| 摘要 |
PURPOSE:To obtain easy and precise perforation of a plastic product by engaging a notch or rib formed in the plastic product with an engaging portion formed in a jig to locate and secure the product thereto. CONSTITUTION:A plastic product 1 has in the upper bended portion 2 thereof a notch which is engaged with an engaging portion 7 having a mating configuration and projecting from the central end portion of the upper surface of a jig 5 so as to locate and secure the product thereto. Then, the jig 5 in engagement with the plastic product is attached to a predetermined position of a perforator 6 which is movable vertically and logitudinally, and lowering of a drill 6a causes perforation to form four perforations in each of the upper and lower bended portions 2, 2 of the plastic product 1. This allows easy and precise perforation of the plastic product. |
