| 摘要 |
<p>PURPOSE:To attain the control of the lock and release of a head plate just with a single plunger by hooking a lock part of a head lock plate to a lock member and preventing the rotation of the head lock plate with a holding plate which interlocks the plunger. CONSTITUTION:A plunger coupled to an arm 16b of a holding plate 16 is energized and the plate 16 holds a head lock plate 7. The plate 7 is pushed by a pin 9a of a drive plate 9 and starts a shift to the right. Thus a head plate 1 connected to the plate 7 via a link 2 is moved downward. With advance of the plate 7, a hook-shaped lock part 10a rides over a lock member 11 and is hooked there. The advanced position of the part 10a is kept to secure a play state. When the energization is released, the plate 7 is set free. Then the hook state of the part 10a is released. Thus it is possible to control the lock and release of the plate 1 when its advance is over as well as the coupled state of the plate 1 with a drive mechanism during its advance just with a single plunger.</p> |
