fig1 is a schematic view briefly showing the structure of a first embodiment of the analyzer of the present invention . the first embodiment of the analyzer of the present invention is provided with a sample receiver 2 for receiving a sample rack containing sample containers , measuring units 5 a , 5 b , 5 c , 5 d for measuring a sample , sample transporting devices 3 for transporting the sample rack , sample holder 4 for holding the sample rack after sample collection , and transport control device 8 . the sample transporting devices 3 are respectively provided for the measuring units 5 a , 5 b , 5 c , and 5 d . the measuring units 5 a , 5 b , 5 c , 5 d may be the same type of measuring unit , or may be different types of measuring units . the measuring units 5 a , 5 b , 5 c , 5 d are connected to a controller 9 via a lan 7 . in the first embodiment , the controller 9 controls the operations of the measuring units 5 a , 5 b , 5 c , and 5 d . the sample receiver 2 is configured to ship a sample rack holding a plurality of sample containers to the sample transporting device 3 on the farthest right in fig1 . the sample receiver 2 is controlled by the transport control device 8 , which is connected to the sample receiver 2 through the lan 7 so as to be capable of data communication . the transport control device 8 controls the sample receiver 2 , sample transporting device 3 , and sample holder 4 by obtaining information relating to the measuring units 5 a , 5 b , 5 c , and 5 d stored in the controller 9 , for example , by obtaining identification information and information relating to the type of measuring unit . fig2 is a perspective view of the exterior of a sample container . as shown in fig2 , the sample container t is tube shaped with an open top end . a sample , for example blood collected from a patient , is accommodated in the interior of the sample container t , and the opening at the top end can be sealed by a cap c . a barcode label bl 1 bearing a printed barcode that identifies the sample is adhered to the side surface of the sample container t . fig3 is a perspective view of the exterior of a sample rack . as shown in fig3 , the sample rack l is configured so as to hold ten sample containers t in a vertical ( upright ) state . a barcode label bl 2 bearing a printed barcode identifying the sample rack l is adhered to the side surface of the sample rack l . in the analyzer 1 shown in fig1 , four sample transporting devices 3 are disposed on the front side ( the side at the bottom of fig1 ) of the measuring units 5 a , 5 b , 5 c , and 5 d . the sample rack l is delivered between adjacent sample transporting devices 3 . the sample transporting device 3 farthest to the right side in fig1 starts transporting the sample rack l received from the sample receiver 2 . the sample transporting device 3 farthest to the left side in fig1 transports the sample rack l to the sample holder 4 . fig4 is a schematic view briefly showing the structure of the sample transporting device 3 of the first embodiment of the present invention . as shown in fig4 , the sample transporting device 3 is provided with a first transport mechanism 31 for supplying a sample to a measuring unit , a second transport mechanism 32 for transporting a sample to a sample transporting device 3 ( or sample holder 4 ) on the downstream side , and a controller 300 for controlling the second transport mechanism 32 . the first transport mechanism 31 is provided with a pre - analysis rack holder 33 capable of temporarily holding a plurality of sample racks l accommodating sample containers t that contain samples to be analyzed , a rack transporter 35 for linearly moving horizontally the sample rack l in the x direction in the drawing , a barcode reader 36 for reading the barcode label adhered to the sample rack l , a rack sensor 37 for detecting the presence of the sample rack l , sample container sensor 38 for detecting the presence of the sample container t , and a rack mover 39 for delivering the sample rack l to a post - analysis rack holder 34 . the reanalysis rack holder 33 is quadrilateral in shape in planar view , with a width slightly larger than the width of the sample rack l . the reanalysis rack holder 33 becomes lower in stages from the circumferential surface so that the unanalyzed sample rack l is mounted on the top surface . the sample rack l is delivered from the second transport mechanism 32 to the reanalysis rack holder 33 by the rack feeder 322 of the second transport mechanism 32 , which is described later . the rack sensor 37 is mounted near the reanalysis rack holder 33 , and the position at which the sample rack l is detected by the rack sensor 37 is the rack detection position 33 a . the sample rack l is transported from the second transport mechanism 32 to the rack detection position 33 a , where the rack sensor 37 detects the transported sample rack l . a rack feeder 33 b , which is capable of extending toward the inner side , is provided on both side surfaces of the reanalysis rack holder 33 . when the sample rack l has been detected by the rack sensor 37 , the sample rack l is moved backward when the sample rack l engages the extended rack feeder 33 b and is moved in this engaged state in a backward direction ( a direction approaching the rack transporter 35 ). the rack feeder 33 b is driven by a stepping motor 33 c provided below the reanalysis rack holder 33 . the rack transporter 35 transports , in the x direction , the sample rack l delivered by the reanalysis rack holder 33 . the sample container detection position 35 a at which the sample container t is detected by the sample container sensor 38 , and the sample supplying position 35 c at which the sample is supplied to the measuring unit are present on the transport path of the sample rack l moved by the rack transporter 35 . the rack transporter 35 moves the sample rack l through the sample container detection position 35 a to the sample supplying position 35 c . the sample supplying position 35 c is a position downstream the distance of one sample in the transport direction from the sample container detection position 35 a , so that when a sample is transported to the sample supplying position 35 c by the rack transporter 35 , the sample container t is grasped by the hand of the measuring unit and removed from the sample rack l , and the sample is supplied to the measuring unit by aspirating the sample from the sample container t . after the rack transporter 35 has transported the sample container t to the sample supplying position 35 c , the transport of the sample rack l is stopped while the supplying of the sample is completed and the sample container t is returned to the sample rack l . the rack transport 35 has two belts , a first belt 351 and a second belt 352 , which operate independently . the widths in the arrow y direction of the first belt 351 and second belt 352 are respectively less than half of the width b of the sample rack l in the arrow y direction . the first belt 351 and second belt 352 are arranged in parallel so as to not protrude beyond the width b in the arrow y direction of the sample rack l when the sample rack l is transported by the rack transporter 35 . the sample rack l can be transported in the x direction and the opposite direction by controlling the movement direction of the first belt 351 and second belt 352 . the barcode reader 36 reads the barcode of the barcode label bl 1 adhered to the sample container t , and reads the barcode of the barcode label bl 2 adhered to the sample rack l as shown in fig2 and 3 . the barcode reader 36 reads the sample barcode of the sample container t as the sample container t is rotated in a horizontal direction by a rotating device while held in the sample rack l . even when the barcode label bl 1 of the sample container t is positioned on the opposite side from the barcode reader 36 , the barcode label bl 1 can be turned toward the barcode reader 36 by rotating the sample container t , thus allowing the barcode reader 36 to read the sample barcode . the rack barcode of the sample rack l records the rack id allocated to each sample rack l , and this information is used in managing the sample analysis results . the rack sensor 37 and the sample container sensor 38 are contact type sensors , respectively configured by a contact piece , light emitting element for emitting light , and light receiving element . the rack sensor 37 and the sample container sensor 38 are curved by the contact piece coming into contact with a detection object , and as a result the light emitted from the light emitting element is reflected by the contact piece and impinges the light receiving element . thus , the sample container t can be detected as the contact piece is bent by the sample container t when the detection object , that is the sample container t containing the sample , passes below the sample container sensor 38 . the rack mover 39 is disposed so as to face the post - analysis rack holder 34 with the rack transporter 35 interposed therebetween , and the rack mover 39 is moved horizontally in the y direction via the drive force of a stepping motor 39 a . thus , the sample rack l is pushed into the post - analysis rack holder 34 by moving the rack mover 39 to the post - analysis rack holder 34 side when the sample rack l is transported to a position 391 between the post - analysis rack holder 34 and the rack mover 39 ( hereinafter referred to as post - analysis rack transport position ). the analyzed sample rack l is therefore moved from the first transport mechanism 31 to the second transport mechanism 32 . the second transport mechanism 32 is configured by the rack mover 321 , rack feeder 322 , and post - analysis rack holder 34 . the rack mover 321 extends in the arrow x direction in the drawing , and is capable of linearly moving horizontally the sample rack l in the arrow x direction . the rack mover 321 has an endless belt 321 a and a stepping motor 321 b , and the belt 321 a is moved in the arrow x direction by the drive force of the stepping motor 321 b . the sample rack l mounted above the belt 321 a can therefore be transported in the x direction . the rack feeder 322 is positioned on the front side of the reanalysis rack holder 33 so as to face the reanalysis rack holder 33 with the rack mover 321 interposed therebetween , and is linearly moved horizontally in the y arrow direction by the drive force of the stepping motor 322 a . thus , the sample rack l is pushed to the rack detection position 33 a within the reanalysis rack holder 33 by moving the rack feeder 322 to the reanalysis rack holder 33 side when the sample rack l is transported to a position 323 between the reanalysis rack holder 33 and the rack feeder 322 ( hereinafter referred to as reanalysis rack transport position ). the post - analysis rack holder 34 is quadrilateral in shape in the planar view , with a width slightly larger than the width of the sample rack l . the post - analysis rack holder 34 becomes lower in stages from the circumferential surface so that the analyzed sample rack l is mounted on the top surface . the sample rack l is delivered from the rack transporter 35 to the post - analysis rack holder 34 by the rack mover 39 . a rack feeder 34 b , which is capable of extending toward the inner side , is provided on both side surfaces of the post - analysis rack holder 34 . when the sample rack l has been moved by the rack mover 39 , the sample rack l is then moved forward when the sample rack l is engaged by the extended rack feeder 34 b and moved forward in the engaged state ( in a direction approaching the rack mover 321 ). the rack feeder 34 b is driven by a stepping motor 34 c provided below the post - analysis rack holder 34 . the sample rack l transporting operation performed by the sample transporting device 3 is controlled by the transport control device 8 , which is connected to the sample transport device 3 via the lan 7 so as to be capable of data communication . that is , the transport control device 8 controls the operation of receiving the sample rack l performed by the sample receiver 2 , the operation of transporting the sample rack l performed by the sample transporting device 3 , and the operation of receiving the sample rack l performed by the sample holder 4 . note that the sample receiver 2 , sample transporting device 3 , and sample holder 4 are respectively provided with a controller 200 , 300 , 400 , which is configured by a cpu , rom , ram and the like , as shown in fig1 . the transport control device 8 is capable of controlling the operations of the sample receiver 2 , sample transporting device 3 , and sample holder 4 via data communication with the controllers 200 , 300 , 400 of the sample receiver 2 , sample transporting device 3 , and sample holder 4 . the control device 9 is also connected so as to be capable of data communication with the controllers 200 , 300 , 400 of the sample receiver 2 , sample transporting device 3 , and sample holder 4 . fig5 is a block diagram showing the structure of the transport control device 8 of the first embodiment of the present invention . as shown in fig5 , the transport control device 8 is configured by a cpu 81 , ram 82 , memory 83 , i / o interface 84 , video interface 85 , portable disk drive 86 , communication interface 87 , and an internal bus 88 , which is connected to all these hardware components . the cpu 81 is connected to each hardware component of the transport control device 8 via the internal bus 88 , so as to control the operation of each hardware component , and execute the functions of various software in accordance with a transport control program 101 stored in the memory 83 . the ram 82 is a volatile memory such as sram , dram or the like , and is used to expand loaded modules during the execution of the transport control program 101 , and to store the temporary data generated during the execution of the transport control program 101 . the memory 83 is configured by an internal fixed storage device ( hard disk ), rom or the like . the transport control program 101 stored in the memory 83 may be downloaded by the portable disk drive 86 from a portable recording medium 80 such as a dvd or cd - rom on which information such as programs and data are recorded , and expanded from the memory 83 to the ram 82 during execution of the program . of course , computer programs such as the transport control program 101 may also be downloaded from a peripheral computer connected to an external network through the communication interface 87 . the memory 83 is also provided with a transport control information memory 831 for storing transport control information such as configuration item information and the like for transport control according to the type of measuring unit connected to the lan 7 . the communication interface 87 is connected to the internal bus 88 so as to be capable of sending and receiving data to / from an external computer by means of connection to an external network such as a lan , wan , or the internet . in the first embodiment , the control device 9 , sample transporting devices 3 and the like are connected via the lan 7 . the i / o interface 84 is connected to an input unit 110 such as a keyboard and mouse or the like , so as to receive data input . the video interface 85 is also connected to an image display unit 120 such as a crt monitor , lcd or the like , so as to display predetermined images . the measuring units 5 a , 5 b , 5 c , 5 d may be all of the same type or may be of different types . in the first embodiment , the measuring units 5 a , 5 b , 5 c are all of the same type , but the remaining measuring unit 5 d is a different type of measuring unit . specifically , the measuring units 5 a , 5 b , 5 c are blood cell counters for counting blood cells using both an electrical resistance method and optical method . the measuring unit 5 d is a smear sample preparing device for preparing a smear sample . note that the measuring units 5 a , 5 b , 5 c , 5 d are not limited to these types and may be urine analyzers , blood coagulation measuring devices , immunoanalyzers , gene amplification measuring apparatuses or the like . fig6 is a block diagram showing the structure of the control device 9 and measuring units 5 a , 5 b , 5 c , 5 d of the first embodiment of the present invention . in the example of fig6 , a structural example is shown of the blood cell counting apparatus , that is , measuring unit 5 a ( 5 b , 5 c ). as shown in fig6 , the measuring unit 5 a ( 5 b , 5 c ) is configured by a sample obtainer 50 , drive circuit 501 for driving the sample obtainer 50 , sample preparing section 52 , drive circuit 502 for driving the sample preparing section 52 , detection section 53 , drive circuit 503 for driving the detection section 53 , and waveform processing circuit 504 for performing waveform processing of the electrical signals output from the detection section 53 . the sample obtainer 50 and sample preparing section 52 are respectively driven by the drive circuit 501 and the drive circuit 502 via control signals corresponding to control data stored in a register 505 . the detection section 53 converts , for example , the obtained optical signals to electrical signals . the waveform processing circuit 504 amplifies the electrical signals converted and transmitted by the detection section 53 , and performs waveform processing of the amplified electrical signals . the register 505 stores the electrical signals that have been subjected to waveform processing by the waveform processing circuit 504 . the communication interface 506 is a lan interface connected by a lan cable 70 to a communication interface 97 of the control device 9 . thus , a processor 507 transmits information relating to the measuring unit 5 a ( 5 b , 5 c ) to the control device 9 when a transmission request signal for information relating to the measuring unit 5 a ( 5 b , 5 c ) is received from the control device 9 . the control device 9 is configured by a cpu 91 , ram , 92 , memory 93 , i / o interface 94 , video interface 95 , portable disk drive 96 , communication interface 97 , and an internal bus 98 connecting these hardware components . the cpu 91 is connected to each hardware component of the control device 9 via the internal bus 98 , so as to control the operation of each hardware component , and execute the functions of various software in accordance with an operation control program 102 stored in the memory 93 . the ram 92 is a volatile memory such as sram , dram or the like , and is used to expand loaded modules during the execution of the operation control program 102 , and to store the temporary data generated during the execution of the operation control program 102 . the memory 93 is configured by an internal fixed storage device ( hard disk ), rom or the like . the operation control program 102 stored in the memory 93 may be downloaded by the portable disk drive 96 from a portable recording medium 90 such as a dvd or cd - rom on which information such as programs and data are recorded , and expanded from the memory 93 to the ram 92 during execution of the program . note that computer programs such as the operation control program 102 may also be downloaded from a peripheral computer connected to an external network through the communication interface 97 . the memory 93 is provided with a measuring unit information memory 931 for storing measuring unit information including the identification information of the connected measuring units 5 a , 5 b , 5 c , 5 d , and information relating to the measured results . the communication interface 97 is connected to the internal bus 98 so as to be capable of sending and receiving data to / from an external computer by means of connection to an external network such as a lan , wan , or the internet . in the first embodiment , the control device 9 is connected to the transport control device 8 and sample transporting devices 3 and the like via the lan 70 . the i / o interface 94 is connected to an input unit 130 such as a keyboard and mouse or the like , so as to receive data input . the video interface 95 is also connected to an image display unit 140 such as a crt monitor , lcd or the like , so as to display predetermined images . in the analyzer of the first embodiment of the present invention , the measuring unit 5 a performs the first examination of the sample , and a determination is made as to whether a re - examination must be performed . when it has been determined that re - examination is required , the sample to be re - examined must be transported to the measuring unit which is to perform the re - examination . that is , when the re - examination is to be performed by the measuring unit that performed the first examination , the sample rack l holding the sample container t containing the sample to be re - examined must be transported back to the sample supplying position 35 c . when the re - examination is performed by the measuring unit 5 b or 5 c , which is a different measuring unit from the measuring unit 5 a that performed the first examination , the sample rack l holding the sample container t containing the sample to be re - examined must be transported to the measuring unit 5 b or 5 c . configurations preset by the user through the image display 120 of the transport control device 8 are received beforehand whether the re - examination of the sample is performed by the measuring unit 5 a or one of the measuring units 5 b or 5 b . fig7 shows an example of a measuring unit configuration screen for configuring the measuring unit for performing the re - examination of a sample of the first embodiment of the analyzer 1 of the present invention . in the measuring unit configuration screen shown in fig7 , a configuration for whether to perform a re - examination is first received by clicking a mouse or the like on a radio button or the like . this configuration may also be received through a selection button or the like on a pulldown menu . note that an erroneous configuration can be avoided before the occurrence by validating the radio button of the re - examination unit configuration only when a “ perform re - examination ” configuration has been received . when a “ perform re - examination ” configuration has been received , the configuration of the measuring unit to perform the re - examination ( re - examination measuring unit ) may then be received . when a “ same unit ” configuration has been received , the sample determined to require re - examination is re - examined by the measuring unit 5 a that performed the first examination . therefore , instructions are transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined back to the sample supplying position 35 c of the measuring unit 5 a . when a “ different unit ” configuration has been received , the sample determined to require re - examination is re - examined by either the measuring unit 5 b or 5 c . note that performing the re - examination by either the measuring unit 5 b or 5 c can be selected based on predetermined selection conditions that have been set previously . for example , the measuring unit nearest the detected position of the sample rack l holding the sample container t containing the sample to be re - examined may be selected , or the measuring unit with the fewest number of sample racks l awaiting examination may be selected by precounting the number of sample racks l being transported to the respective measuring units 5 b and 5 c . the measuring unit that has the lightest processing load may also be selected by precalculating the processing loads of the processors 507 of the respective measuring units 5 b and 5 c . instructions are then transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the selected measuring unit 5 b or 5 c . when an “ assign ” configuration has been received , the sample determined to require re - examination is re - examined by the measuring unit assigned by the user . assigning a measuring unit may also be accomplished by , for example , a pulldown menu . in this case , instructions are transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the assigned measuring unit . when an “ unassigned ” configuration has been received , the sample determined to require re - examination is re - examined by a measuring unit selected based on a predetermined condition . note that the selection of any measuring unit may be accomplished by presetting predetermined selection conditions . for example , the measuring unit nearest the sample rack l holding the sample container t containing the sample to be re - examined at the moment the transport control device 8 has received the re - examination order signal from the control device 9 may be selected , or the measuring unit with the fewest number of sample racks l awaiting examination may be selected by precounting the number of sample racks l being transported to the respective measuring units 5 a , 5 b , and 5 c . the measuring unit that has the lightest processing load may also be selected by precalculating the processing loads of the processors 507 of the respective measuring units 5 a , 5 b , and 5 c . instructions are then transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the selected measuring unit . the selection information of the measuring unit for performing the re - examination , which has been configured on the measuring unit configuration screen shown in fig7 , is stored in the transport control information memory 831 of the transport control device 8 . the cpu 81 of the transport control device 8 obtains the information relating to the transport priority of the sample to be re - examined by referencing the selection information of the measuring units stored in the transport control information memory 831 . the configuration of the measuring unit for performing the re - examination may also be received for each measurement item . in this case , a plurality of measurement items are prestored as determination conditions in the memory 83 of the transport control device 8 , and the configuration of the selection conditions of the measuring unit are received when re - examination is to be performed for individual measurement items . fig8 shows an example of a configuration screen for configuring each measurement item of the measuring unit for performing the re - examination of the first embodiment of the analyzer 1 of the present invention . in the measuring unit configuration screen shown in fig8 , the configuration of whether to perform re - examination is received for each measurement item 71 by clicking the mouse or the like on a button 72 . this configuration may also be received through a radio button or the like on a pulldown menu . the items displayed in the measurement items 71 are read from the measurement items stored as determination conditions in the memory 83 . in fig8 , the items received for the configuration are batched . note that an erroneous configuration can be avoided before the occurrence by validating the radio button of the re - examination unit configuration only when a “ perform re - examination ” configuration has been received . the “ same unit ” configuration is specified in the example of fig8 in relation to the “ abnormal red blood cell count ” and “ abnormal white blood cell count ” configuring the measuring unit for performing the re - examination when an abnormality has been detected in the red blood cell count and white blood cell count measurement items . in this case , the sample determined to require re - examination is re - examined by the measuring unit 5 a . therefore , instructions are transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined back to the sample supplying position 35 c of the measuring unit 5 a . the “ other unit ” configuration is specified in the example of fig8 in relation to the “ white blood cell fraction ” configuring the measuring unit for performing the re - examination when an abnormality has been detected in the white blood cell fraction measuring item . in this case , the sample determined to require re - examination is re - examined by the measuring unit 5 b or 5 c . note that the selection of either measuring unit 5 b or 5 c may also be accomplished by presetting a predetermined selection condition . for example , the measuring unit nearest the detected position of the sample rack l holding the sample container t containing the sample to be re - examined may be selected , or the measuring unit with the fewest number of sample racks l awaiting examination may be selected by precounting the number of sample racks l being transported to the respective measuring units 5 b and 5 c . the measuring unit that has the lightest processing load may also be selected by precalculating the processing loads of the processors 507 of the respective measuring units 5 b and 5 c . instructions are then transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the selected measuring unit 5 b or 5 c . when the “ assign 5 c ” configuration is received , the sample determined to require re - examination is re - examined by the assigned measuring unit 5 c . although only the measuring unit 5 c is assigned in the example of fig8 , such assignment is not specifically limited . in this case , instructions are then transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the assigned measuring unit 5 c . when an “ unassigned ” configuration has been received , the sample determined to require re - examination is re - examined by a measuring unit assigned based on a predetermined condition . note that the selection of any measuring unit may be accomplished by presetting predetermined selection conditions . for example , the measuring unit nearest the sample rack l holding the sample container t containing the sample to be re - examined at the moment the transport control device 8 has received the re - examination order signal from the control device 9 may be selected , or the measuring unit with the fewest number of sample racks l awaiting examination may be selected by precounting the number of sample racks l being transported to the respective measuring units 5 a , 5 b , and 5 c . the measuring unit that has the lightest processing load may also be selected by precalculating the processing loads of the processors 507 of the respective measuring units 5 a , 5 b , and 5 c . instructions are then transmitted from the cpu 81 of the transport control device 8 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the selected measuring unit . the selection information of the measuring unit for performing the re - examination , which has been configured on the measuring unit configuration screen shown in fig8 , is stored in the transport control information memory 831 of the transport control device 8 . the cpu 81 of the transport control device 8 obtains the information relating to the transport priority of the sample to be re - examined by referencing the selection information of the measuring units stored in the transport control information memory 831 . whether or not re - examination is required may also be determined based on whether or not the obtained measurement data are within a normal range by storing a normal range of normal measurement values in the memory 93 of the control device 9 to be used for determining whether the measurement value of each measurement item is normal . in this case , an item may be provided for receiving the configuration of a normal range for each measurement item in the example of fig8 . note that overlooking a sample that requires re - examination can be prevented before the occurrence and needless re - examination can be avoided by suitably configuring a normal range for each measurement item . a configured normal range for each measurement item is stored in the memory 93 of the control device 9 through the lan 7 . fig9 is a flow chart showing the sequence of the re - examination process performed by the cpu 81 of the transport control device 8 of the analyzer 1 of the first embodiment of the present invention . in fig9 , the cpu 81 of the transport control device 8 of the analyzer 1 of the first embodiment determines whether a re - examination order signal , which specifies the execution of re - examination , has been received from the cpu 91 of the control device 9 . that is , the cpu 81 determines that re - examination is required when a re - examination order signal , which specifies the execution of re - examination , has been received from the cpu 91 , and determines that re - examination is not required when a re - examination order signal , which specifies the execution of re - examination , has not been received from the cpu 91 within a predetermined time . note that the cpu 91 of the control device 9 determines whether re - examination is required based on a predetermined condition , and transmits a re - examination order signal to the transport control device 8 when re - examination is required , and does not transmit a re - examination order signal when re - examination is not required . the cpu 81 then awaits reception when the cpu 81 has determined that a re - examination order signal has not been received ( step s 901 : no ). the re - examination order signal includes not only the information contained in the first order information , for example , the patient id that identifies the patient and the sample id contained in the barcode information as information identifying the sample , but also includes the measuring unit id that identifies the measuring unit that performed the first examination , as well as the measurement items determined to require re - examination . when the cpu 81 has determined that a re - examination order signal has been received ( step s 901 : yes ), the cpu 81 references the measuring unit selection information stored in the transport control information memory 831 ( step s 902 ), and specifies the measuring unit that has the transport priority for the sample determined to require re - examination ( step s 903 ). the cpu 81 determines whether the specified measuring unit is the same measuring unit that performed the first examination . when the cpu 81 determines that the specified measuring unit is the same measuring unit that performed the first examination ( step s 904 : yes ), the cpu 81 transmits instructions to transport the sample rack l holding the sample container t containing the sample to be re - examined back to the sample supplying position 35 c of the measuring unit that performed the first examination ( step s 905 ). when the cpu 81 determines that the specified measuring unit is not the same measuring unit that performed the first examination ( step s 904 : no ), the cpu 81 transmits instructions to transport the sample rack l holding the sample container t containing the sample to be re - examined to the specified measuring unit ( step s 906 ). according to the first embodiment described above , an analyzer is provided that is capable of realizing both a demand to perform re - examination by a different measuring unit than that which performed the first examination and a demand to obtain analysis results quickly for a sample determined to require re - examination by respectively receiving a configuration of the measuring unit that performed the first examination capable of obtaining an analysis result most quickly , or a configuration of another measuring unit different than the measuring unit that performed the first examination . since the structure of the analyzer 1 of the second embodiment of the present invention is identical to the structure of the analyzer 1 of the first embodiment and like parts are designated by like reference numbers , detailed description is therefore abbreviated . the second embodiment differs from the first embodiment in that the cpu 81 controls the sample transporting devices 3 so as to transport the sample to the measuring device capable of obtaining the analysis result in the shortest time by calculating , the analysis result obtaining time for each measuring unit , that is , the time needed to obtain the analysis result of re - examination at the moment the sample has been determined to require re - examination . accordingly , whether re - examination is performed by the measuring unit 5 a that performed the first examination , or re - examination is performed by the measuring unit 5 b or 5 c does not need to be preconfigured by the user through the image display 120 of the transport control device 8 , nor by the measuring unit configuration screen for configuring the measuring unit for performing the re - examination . that is , the processing is identical to when the “ unassigned ” configuration is specified in the first embodiment . when a predetermined sample has been determined to require re - examination , the cpu 81 of the transport control device 8 detects the current position of the sample rack l holding the sample container t containing the sample to be re - examined , and calculates , for the measuring unit of each transport priority , the analysis result obtaining time from the aspiration of the transported sample until the analysis result is obtained . the analysis result obtaining time may also be the transport time from the current position of the sample rack l holding the sample container t containing the sample to be re - examined , or a time converted the number of sample awaiting measurement for each measuring unit . these times may also be combined , and index calculated for a comprehensive determination . fig1 is a flow chart showing the sequence of the re - examination process performed by the cpu 81 of the transport control device 8 of the analyzer 1 of the second embodiment of the present invention . in fig1 , the cpu 81 of the transport control device 8 of the analyzer 1 of the second embodiment determines whether a re - examination order signal , which specifies the execution of re - examination , has been received from the cpu 91 of the control device 9 ( step s 1001 ). the cpu 81 then awaits reception when the cpu 81 has determined that a re - examination order signal has not been received ( step s 1001 : no ). the re - examination order signal includes not only the information contained in the first order information , for example , the patient id that identifies the patient and the sample id contained in the barcode information as information identifying the sample , but also includes the measuring unit id that identifies the measuring unit that performed the first examination , as well as the measurement items determined to require re - examination . when the cpu 81 determines that a re - examination order signal has been received ( step s 1001 : yes ), the cpu 81 calculates the analysis result obtaining time for each measuring unit ( step s 1002 ). the cpu 81 selects the measuring unit with the shortest calculated analysis result obtaining time as the measuring unit for performing re - examination ( step s 1003 ). the cpu 81 determines whether the selected measuring unit is the same measuring unit that performed the first examination ( step s 1004 ). when the cpu 81 determines that the selected measuring unit is the same measuring unit that performed the first examination ( step s 1004 : yes ), the cpu 81 transmits instructions to transport the sample rack l holding the sample container t containing the sample to be re - examined back to the sample supplying position 35 c of the measuring unit that performed the first examination ( step s 1005 ). when the cpu 81 has determined that the selected measuring unit is another measuring unit that is different than the measuring unit that performed the first examination ( step s 1004 : no ), the cpu 81 transmits instruction to transport , to the selected measuring unit , the sample rack l holding the sample container t containing the sample to be re - examined ( step s 1006 ). according to the second embodiment , the analysis result obtaining time required to re - examine a sample determined to require re - examination is calculated for each measuring unit , and the measuring unit with the shortest calculated analysis result obtaining time is selected as the measuring unit for re - examining the sample . the re - examination analysis result can be obtained early by automatically selecting the measuring unit with the shortest analysis result obtaining time as the measuring unit for performing the re - examination by performing controls to transport the sample determined to require re - examination to the selected measuring unit . note that not only is the measuring unit with the shortest calculated analysis result obtaining time selected as the measuring unit to perform the re - examination , the calculated analysis result obtaining times may also be displayed on the screen display 120 so that the user may also select a measuring unit to perform the re - examination based on the displayed analysis result obtaining times . in this case , the measuring unit with the shortest analysis result obtaining time can be selected as the measuring unit to perform re - examination by having the transport control device 8 perform controls to transport the sample determined to require re - examination to the selected measuring unit . fig1 is a schematic view briefly showing the structure of the analyzer 1 of a third embodiment of the present invention . the analyzer 1 of the third embodiment of the present invention is provided with two measuring units including a first measuring unit 5 a and second measuring unit 5 b that are mutually of the same type , sample transporting device ( transporting device ) 3 disposed on the front side of the first measuring unit 5 a and the second measuring unit 5 b , and a control device 12 configured by a pc ( personal computer ) electrically connected to the first measuring unit 5 a , second measuring unit 5 b , and sample transporting device 3 . in the third embodiment , the first measuring unit 5 a and the second measuring unit 5 b are the same type of measuring unit , which measure a sample by measuring the same items using the same measurement principle . note that in this case the same type of measuring unit not only includes the two measuring units 5 a and 5 b which measure a sample for completely identical measurement items , but also includes cases wherein a plurality of measurement items measured by the first measuring unit 5 a and a plurality of measurement items measured by the measuring unit 5 b are partially in common to both measuring units . the first measuring unit 5 a and the second measuring unit 5 b are arranged in parallel . furthermore , the first measuring unit 5 a and the second measuring unit 5 b measure predetermined measurement items of a sample aspirated , by an internal sample aspirating section and accessed through ports 51 a and 51 b provided in the housing , from sample container t held in a sample rack l transported by the sample transporting device 3 . the control device 12 is configured by a personal computer ( pc ) or the like . fig1 is a block diagram showing the structure of the control device 12 of the analyzer 1 of the third embodiment of the present invention . as shown in fig1 , the control device 12 is configured by a cpu 121 , ram 122 , memory 123 , i / o interface 124 , video interface 125 , portable disk drive 126 , communication interface 127 , and an internal bus 128 , which is connected to all these hardware components . the cpu 121 is connected to each hardware component of the control device 12 via the internal bus 128 , so as to control the operation of each hardware component , and execute the functions of various software in accordance with a transport control program 101 stored in the memory 123 . the ram 122 is a volatile memory such as sram , dram or the like , and is used to expand loaded modules during the execution of the transport control program 101 , and to store the temporary data generated during the execution of the transport control program 101 . the memory 123 is configured by an internal fixed storage device ( hard disk ), rom or the like . the transport control program 101 stored in the memory 123 may be downloaded by the portable disk drive 126 from a portable recording medium 80 such as a dvd or cd - rom on which information such as programs and data are recorded , and expanded from the memory 123 to the ram 122 during execution of the program . note that computer programs such as the transport control program 101 may also be downloaded from a peripheral computer connected to an external network through the communication interface 127 . the memory 123 is provided with a transport control information memory 1231 for storing transport control information , such as the configuration item information for transport control , for each measuring unit 5 a and 5 b . the communication interface 127 is connected to the internal bus 128 so that the control device 12 is capable of sending and receiving data to / from an external computer by means of connection to an external network such as a lan , wan , or the internet . the i / o interface 124 is connected to an input unit 12 b such as a keyboard and mouse or the like , so as to receive data input . the video interface 125 is connected to an image display 12 a such as a crt monitor , lcd or the like to display predetermined images . the brief structure of the sample transporting device 3 is identical to that of the first embodiment and like parts are designated by like reference numbers ; therefore detailed description is abbreviated . note that the reanalysis rack holder 33 is quadrilateral in shape in planar view , with a width slightly larger than the width of the sample rack l . the reanalysis rack holder 33 becomes lower in stages from the circumferential surface so that the sample rack l , which holds the reanalysis sample containers t , is mounted on the top surface . the post - analysis rack holder 34 is also quadrilateral in shape in the planar view , with a width slightly larger than the width of the sample rack l . the post - analysis rack holder 34 becomes lower in stages from the circumferential surface so that the post analysis sample rack l is mounted on the top surface . in the analyzer of the third embodiment of the present invention , the measuring unit 5 a performs the first examination of the sample , and a determination is made as to whether a re - examination must be performed . when it has been determined that re - examination is required , the sample to be re - examined must be transported to the measuring unit which is to perform the re - examination . that is , when the re - examination is to be performed by the measuring unit that performed the first examination , the sample rack l holding the sample container t containing the sample to be re - examined must be transported back to the sample supplying position 35 c . when the re - examination is performed by the measuring unit 5 b , the sample rack l holding the sample container t containing the same to be re - examined must be transported to the adjacent measuring unit 5 b . whether the measuring unit 5 a performs the re - examination or the measuring unit 5 b performs the re - examination can be preconfigured by the user through the image screen 12 a of the control device 12 . the measuring unit configuration screen displayed on the image display 12 a is identical to that of first embodiment shown in fig7 . when a “ perform re - examination ” configuration has been received , the configuration of the measuring unit ( re - examination unit ) to perform the re - examination ( re - examination measuring unit ) is received . when a “ same unit ” configuration has been received , the sample determined to require re - examination is re - examined by the measuring unit 5 a that performed the first examination . therefore , instructions are transmitted from the cpu 121 of the control device 12 to transport the sample rack l holding the sample container t containing the sample to be re - examined back to the sample supplying position 35 c of the measuring unit 5 a . when a “ different unit ” configuration has been received , the sample determined to require re - examination is re - examined by the measuring unit 5 b . the cpu 121 of the control device 12 issues instructions to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the measuring unit 5 b . when an “ assign ” configuration has been received , the sample determined to require re - examination is re - examined by the measuring unit assigned by the user . assigning a measuring unit may also be accomplished by , for example , a pulldown menu . in this case , instructions are transmitted from the cpu 121 of the control device 12 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the assigned measuring unit . when an “ unassigned ” configuration has been received , the sample determined to require re - examination is re - examined by the measuring unit selected based on a predetermined condition . note that the selection of any measuring unit may be accomplished by presetting predetermined selection conditions . for example , the measuring unit nearest the detected position of the sample rack l holding the sample container t containing the sample to be re - examined may be selected , or the measuring unit with the fewest number of sample racks l awaiting examination may be selected by precounting the number of sample racks l being transported to the respective measuring units 5 a and 5 b . the measuring unit that has the lightest processing load may also be selected by precalculating the processing loads of the processors 507 of the respective measuring units 5 b and 5 b . instructions are then transmitted from the cpu 121 of the control device 12 to transport the sample rack l holding the sample container t containing the sample to be re - examined to the sample supplying position 35 c of the selected measuring unit . the selection information of the measuring unit for performing the re - examination , which has been configured on the measuring unit configuration screen shown in fig7 , is stored in the transport control information memory 1231 of the control device 12 . the cpu 121 of the control device 12 obtains the information relating to the transport priority of the sample to be re - examined by referencing the selection information of the measuring units stored in the transport control information memory 1231 . the configuration of the measuring unit for performing the re - examination may also be received for each measurement item . in this case , a plurality of measurement items are prestored as determination conditions in the memory 123 of the control device 12 , and the configuration of the selection conditions of the measuring unit are received when re - examination is to be performed for individual measurement items . since the configuration screen of each measurement item of the measuring unit for performing the re - examination is identical to that of the first embodiment shown in fig8 , including the configuration content , detailed description is abbreviated . the selection information of the measuring unit for performing the re - examination , which has been configured on the measuring unit configuration screen shown in fig8 , is stored in the transport control information memory 1231 of the control device 12 . the cpu 121 of the control device 12 obtains the information relating to the transport priority of the sample to be re - examined by referencing the selection information of the measuring units stored in the transport control information memory 1231 . note that , whether or not re - examination is required may also be determined based on whether or not the obtained measurement data are within a normal range by storing a normal range of normal measurement values in the memory 123 of the control device 12 to be used for determining whether the measurement value of each measurement item is normal . in this case , an item may be provided for receiving the configuration of a normal range for each measurement item in the example of fig8 . note that overlooking a sample that requires re - examination can be prevented before the occurrence and needless re - examination can be avoided by suitably configuring a normal range for each measurement item . a normal range for each measurement item of the configuration can be stored in the memory 123 of the control device 12 . fig1 is a flow chart showing the sequence of the re - examination process performed by the cpu 121 of the control device 12 of the analyzer 1 of the third embodiment of the present invention . in fig1 , the cpu 121 of the control device 12 of the analyzer 1 of the third embodiment determines whether a sample for which an analysis result has been obtained will be re - examined ( step s 1301 ). when the cpu 121 determines not to re - examine ( step s 1301 : no ), the cpu 121 end the process . when the cpu 121 determines to perform re - examination ( step s 1301 : yes ), the cpu 121 references the measuring unit selection information stored in the transport control information memory 1231 ( step s 1302 ), and specifies the transport priority measuring unit to perform re - examination of the sample requiring re - examination ( step s 1303 ). the cpu 121 determines whether the specified measuring unit is the same measuring unit that performed the first examination ( step s 1304 ). when the cpu 121 determines that the specified measuring unit is the same measuring unit that performed the first examination ( step s 1304 : yes ), the cpu 121 transmits instructions to transport the sample rack l holding the sample container t containing the sample to be re - examined back to the sample supplying position 35 c of the measuring unit that performed the first examination ( step s 1305 ). when the cpu 121 determines that the specified measuring unit is not the same measuring unit that performed the first examination ( step s 1304 : no ), the cpu 121 transmits instructions to transport the sample rack l holding the sample container t containing the sample to be re - examined to the specified measuring unit ( step s 1306 ). according to the third embodiment , the configuration of the measuring unit for performing re - examination of a sample can be optionally received . therefore , it is possible to receive an explicit specification of the measuring unit that performed the first examination capable of obtaining an analysis result in the shortest time , or a different measuring unit than that which performed the first examination as the measuring unit for performing the re - examination . accordingly , it is possible to perform the re - examination by the sample using the measuring unit that performed the first examination or using a different measuring unit when the analysis result of a predetermined measurement item is outside the normal range , and when a cause of the abnormality can not be specified . note that the present invention is not limited to the embodiments described above , and may be variously modified and rearranged insofar as such modification is within the scope of the invention . for example , the transport control device 8 and control device 9 may be singular or plural , or may be integratedly combined . furthermore , the re - examination order signal may be transmitted to the transport control device 8 when the control device 9 performs a determination as to whether a sample requires re - examination and has determined that the sample requires re - examination . however , the present invention is not limited to this configuration . for example , a host computer connected to the analyzer 1 through the lan 7 may perform the determination as to whether a sample requires re - examination , and may transmit a re - examination order signal to the transport control device 8 when the host computer has determined that the sample requires re - examination .