| 摘要 |
PROBLEM TO BE SOLVED: To provide a conveyance device in which computer control is made redundant by using a simple mechanism, the device itself is simple such that maintenance is facilitated, and a relative convexoconcave difference of a conveyed body on a conveyance belt has a flatness of approximately 0.05 mm or less.SOLUTION: A suction type conveyance device is constituted of: a perforated metallic belt in which multiple through-holes are formed; and a housing-shaped suction body which sucks a conveyed body together with the perforated metallic belt and has a prescribed length along a travel direction of the perforated metallic belt, and of which width almost coincides with a perforated part width of the perforated metallic belt. In the suction type conveyance device, there is disposed, at an upper part of the suction body, a porous plate having air permeability and on which the perforated steel belt slides to move on its surface, whereas an air chamber is formed at a lower part of the suction body. The suction type conveyance device is configured such that: air inside the air chamber is forcibly discharged via vacuum holes that are open to a bottom surface of the suction body; and a height difference in surface irregularity of the porous plate is made to be approximately 0.05 mm or less and thereby a heigh difference in irregularity of the conveyed body is approximately 0.05 mm or less. |
