| 摘要 |
PURPOSE:To omit the shutting operation corresponding to a dumping direction and to improve the working efficiency by a method wherein a side board can be opened automatically by the relative revolution between a shaft of revolution and a dumping body or a chassis frame. CONSTITUTION:When a dumping body 1 falls and turns an operating piece 34 comes into contact with the roller 37 of a guide member 36 and when the dumping body 1 falls and turns further, the operating piece 34 is restrained from motion, a bell-crank 32 turns about a shaft 31, the rear board 9 is shut automatically as a hook 11 engages with a pin 10. When a side board is used, the dumping body 1 rises and turns about the axis of a stopper pin 5 but through an operating piece 35 separates from the roller 37 no external force acts and according a toggle mechanism 30 remains as it is and the rear board continues to be shut. |
