said conveying unit is provided with a front side frame and a rear side frame arranged, spaced at a distance, in the back and forth direction, a support member that couples said frames together, and a conveying belt mechanism arranged between said frames, and is positioned under {HEAD ~ said support frame} spaced at {TAIL ~ a distance} 
spaced at
said conveying unit is provided with a front side frame and a rear side frame arranged , spaced at a distance , in the back and forth direction , a support member that couples said frames together , and a conveying belt mechanism arranged between said frames , and is positioned under { HEAD ~ said support frame } spaced at { TAIL ~ a distance }
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