| 摘要 |
PURPOSE:To prevent deflected abrasion of a buffer material and gnawing of an engaged face and to easily execute assembling and working, by constituting an engaged inclined face of a drive cam and a slide cam in an engaged state at all times without the buffer material, and fitting the buffer material to the press- contact face of the moving side and the drive cam. CONSTITUTION:An upper holder 1 descends from the top dead center of a press, a work W is pressed against a punch 11 by a pad 12, and thereafter, a press- contact face 1a of the upper holder 1 is made to press-contact with a buffer material 23, and a drive cam 1 is depressed. As a result, the drive cam 15 is guided to a casing 14 and a holding hole 16 of a give plate 17 and descends while compressing a coil spring 22, and its engaged face 15a slides down along an engaged face 18a slide cam 18. Subsequently, the slide cam 18 compresses a coil spring 21, is guided to the casing 14 and the give plate 17 and advances, and desired working is executed to the work W by a pierce punch 10. |
