| 摘要 |
PURPOSE:To eliminate the necessity of a supporting bar by preventing the fall-down of an erected holding member by a lock member. CONSTITUTION:By turning and operating a hook lever 17, the lock of the holding member 15 is released. By grasping a knob part 18 by one hand, the holding member 15 is turned and erected. The engagement of a lock pin 14 with a lock lever 12 that is not turned nor regulated by a buffle plate 19 is released with the other hand to turn and erect the lock lever 12. Its engaged part 12a is engaged with the engaging groove 15c of the holding member 15, thereby preventing the holding member 15 from falling down. Consequently, the supporting bar for preventing the holding member from falling down, which has been used, is not needed any more. |
