| 摘要 |
PROBLEM TO BE SOLVED: To provide a rear flap door opening/closing mechanism which enables loading of a long object and dropping of sediment adhering to four corners of a box by making a top end and a bottom end of a rear flap door openable and closable.SOLUTION: A rear flap door opening/closing mechanism 1 comprises: a drive device 10 which is provided at a rear end side of a box 110 and drives a cylinder shaft 11 in a vertical direction from its distal end side, and whose base end is mounted rotatably; a first arm 20 whose one end is rotatably connected to a distal end of the cylinder shaft 11; a plate 30 which is erected upward at a rear end of a lateral flap 120 provided at the lateral side of the box 110 of a dump truck 100, and whose corner on the rear side is rotatably connected to the rear end of the lateral flap 120 and whose corner on the front side is rotatably connected to the other end of the first arm 20; and a second arm 40 whose one end is rotatably connected to a top end of the plate 30 and whose the other end is rotatably connected to the top end of a rear flap door 111.SELECTED DRAWING: Figure 1 |
