JPS641869Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rear door opening/closing device for a dump truck, and particularly relates to an operating lever of the opening/closing device that opens and closes upward.

(Prior Art) Conventionally, an opening/closing device for opening and closing a rear sliding door upwardly includes an arm member whose central portion is rotatably pivoted to a vehicle body frame, and a link member connecting the rear sliding door and the arm member. The fan door opening/closing device is composed of a stopper member that is urged by a spring to abut against the arm member, and an operating lever is provided on a side of the stopper member toward the outside. Because it is fixed and juts out to the side, it is easy to come into contact with other objects, and there is a risk that the sliding door will open in that case, which is a problem.

(Example) This invention was made in view of the above problems,
Below, an embodiment of this invention will be explained based on the drawings. 1 is a cargo box placed on the rear body frame 2 of a dump truck.
The cargo box 1 is mounted so that it can be tilted freely via the hinge shaft 3.
A rear fan door 4 is pivotally connected to the rear end opening via a pivot shaft 5 so as to open and close upwardly, and the rear door 4 is opened and closed at the rear end opening of the cargo box 1 in a state where the closed position is tilted slightly rearward from the vertical direction. At the same time, the rear fan door 4 is closed when it is fully opened.
are connected so as to abut against the regulating member 6 and to be substantially flush with the floor surface of the cargo box 1.

Reference numeral 7 denotes an arm member, whose substantially central portion is rotatably supported on the same axis as the hinge shaft 3, and a link 9 is connected between the upper end of this arm member 7 and the outer end of the bracket 8 of the rear fan door 4. are pivotally connected by pins 10 and 11, and the arm member 7 is provided so as to be biased counterclockwise about the hinge shaft 3 when the rear fan door 4 is in the closed position. Similarly, a stopper member 12 is provided on the vehicle body frame 2, with which the side surface of the arm member 7 abuts at the closed position of the rear fan door 4. This stopper member 12 is biased counterclockwise by a spring 13, and its base is It is rotatably provided on a base shaft 14 pivotally attached to both left and right ends of the frame 2, and an operating lever 15 is fixed to the side thereof. Therefore, by rotating the operating lever 15, the stopper member 12 can be rotated clockwise about the base shaft 14.

By the way, the operating lever 15 includes a fixing rod 16 fixed to the side of the stopper member 12, a handle 17 having a space inside, a bar 18 inserted into the interior space of the handle 17, etc. The fixed rod 16 has a bifurcated tip, into which the tip of the bar 18 is inserted and connected with a pin 20. Further, stoppers 21 and 22 are fixed to the tips of the handle 17 and the bar 18, respectively, and a spring 19 is installed between them. As a result, the handle 17 is always urged downward by the spring 19 and is fixedly supported by the upper and side portions of the fixed rod 16.

Therefore, when operating the operating lever 15, it is only necessary to rotate the handle 17 and place it perpendicular to the stopper member 12, and when driving or after operation, rotate the handle 17 in the original direction and place it parallel to the stopper member 12. By placing the operating lever 15 in the driving position and the operating position, the operating lever 15 can be fixedly supported at each of the traveling position and the operating position.

(Effects of the Invention) The present invention, configured as described above, eliminates the risk of the rear sliding door opening due to the operating lever coming into contact with another object while the vehicle is running, thereby contributing to improved safety.

[Brief explanation of drawings]

Figure 1 is a side view of the rear of a dump truck's cargo box when the cargo box is laid down, showing an embodiment of this invention, and Figure 2 is the same rear part of the cargo box as in Figure 1, with the automatic opening/closing function released and the fan door facing the floor. FIG. 3 is a partially enlarged view seen from the direction A in FIG. 1. 1... Packing box, 2... Vehicle frame, 3... Hinge shaft,
4... Rear fan door, 16... Fixed rod, 17... Handle, 18... Bar, 19... Spring.

Claims (1)

[Scope of utility model registration request] In a dump truck equipped with an opening/closing device for opening and closing a rear fan door upwardly at the rear end opening of a cargo box mounted on a vehicle body frame so as to be tiltable, approximately the center portion thereof is rotatably pivoted to the vehicle body frame. a link pivotally connected between a position spaced from the pivot shaft of the rear sliding door and the arm member, and a link rotatably provided on the vehicle body frame side and abutting against the arm member. The handle of the operating lever is bent around a connecting pin with a fixing rod fixed to the side of the stopper member. An operating lever for a dump truck fan door opening/closing device characterized by being freely provided.