| 摘要 |
<p>PURPOSE:To open and close upper and lower dump doors respectively separately or simultaneously by a method wherein the dump door of a platform is divided into upper and lower doors, each upper and lower end of the upper and lower dump doors is pivotally mounted by means of hinges, and the upper and lower hinges of the upper dump door and the upper hinges of the lower dump door are formed detachably. CONSTITUTION:Both upper and lowr ends of the upper and lower dump doors 3a, 3b are pivotally mounted to a panel 2 by means of the hinges 4, 5, 6, 7. The upper hinge 4 of the upper dump door 3a is constituted detachably by means of a bracket 8 fixed to the panel 2, a hinge pin 9 tightly mounted to the dump door 3a and a pin 10 supporting said pin 9 to the bracket 8. The hinge sections of the lower end 5 of the upper dump door and the upper end 6 of the lower dump door are formed detachably by pins 19, 20 fitted to each door, openings 17, 18 shaped to the panel and a pin 21 supporting the pins 19, 20. Said each supprting pin 10, 21 is connected to levers 24, 15, and the pins can be extracted or inserted by means of the levers.</p> |
