| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a projection and to also eliminate straightening and adjusting works, etc., of its curvature by getting rid of a dog for detection from a tray. SOLUTION: It is not necessary to install a conventional dog on a tray 7 and straightening and adjusting works, etc., of its curvature are not required as a clearance S between each of the adjacent trays 7 and detection holes 23 smaller than the clearance S in size drilled on the original point trays 7 are detected by two photoelectric sensors 22.
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