| 摘要 |
PURPOSE:To make it possible to automatically correct a slip, by guiding the upper end part of a valve stem during pressurization of an upper sheet, with the use of a chamfered part formed in the lower end section of a second cylindrical member in a first cylindrical member. CONSTITUTION:An assembly jig body 15 and three pawls 16 are attached to the lower section of a hand body 13 which is held on a slide bearing through the intermediary of a slide shaft, movably in the vertical direction. The assembly jig body 15 is cylindrical and inserted therein with a slidable centering member 17 in which a rod-like cotter guide 20 having a tapered end is slidably disposed. Further, springs 18, 19 are disposed in the assembly jig body 15 and a centering member 17, respectively. With this arrangement the centering member 17 is pressed downward by a relatively strong force while the cotter guide 20 is pressed downward by a relatively weak force. |
