JPS6310015B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hinge operating device for switching the hinge position in order to tilt a cargo box in each direction in a side dump truck or a three-turn dump truck.

Conventionally, side dump trucks or three-turn dump trucks have been known in which the tilting direction of a cargo box can be changed by replacing two lashing pins with engagement pieces. As shown in , the lashing pin is supported by engagement pieces at both ends, and when the cargo box is tilted because the middle part comes into contact with the support pin (male hinge part), it is susceptible to large loads due to bending and shearing. In order to accommodate this, the pins had to be made larger, making them cumbersome to handle and lacking in strength and safety.

This invention solves the above-mentioned conventional problems. Hereinafter, embodiments of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a chassis of a three-turn dump truck, and girder members 2 are fixed to the front and rear of the chassis 1. There is. Regarding the hinge 3, reference numeral 4 is a support pin that is attached to both left and right ends of the beam member 2 via brackets 5, and is attached to the cargo box 8.
It is adapted to engage appropriately with engagement pieces 10 fixed to both left and right ends of the bottom.

To explain the details of the hinge 3, the engaging piece 1
0 is composed of a fixed member 11 and a movable member 12. The lower end of the fixed member 11 is formed into a bifurcated shape and has a short piece 13 and a long piece 14, and an arc-shaped portion 15 between the two pieces engages with the support pin 4. A hollow portion 16 is formed above the intermediate portion of the fixing member 11, and a support portion 18 on which the tip side of the lashing pin 17 is supported is provided at the lower end of the hollow portion 16. On the other hand, the movable member 12 has an intermediate portion pivotally supported 19 between the upper portions of the short pieces 13 of the fixed member 11, and an insertion hole 20 for a lashing pin 17 is bored in the lower part of the pivot 19. A boss 21 is provided at the bottom, and a securing portion 22 for securing the support pin 4 is provided at the lower part. The lower half of the insertion hole 20 on the distal end side is cut out, and the upper half is formed with a support section 30. In addition, 23 is a grip part of the lashing pin 17, 24
is a through hole bored in the boss 21 and the lashing pin 17, and the lashing pin 17 is inserted by inserting the snap pin 25.
A spring 26 is provided above the cavity 16 to bias the movable member 12 in the securing direction. Further, 27 is a hydraulic cylinder provided between the vehicle platform 1 and the cargo box 8.

Next, to explain the operation of the present invention, when traveling, the lashing pin 17 is inserted into the insertion hole 20 as shown by the solid line in FIGS. 2 and 3, and its base end is The distal end side is supported by the support section 30 and the support section 18 in the upper half of the insertion hole 20, respectively, and as a result, the securing pin 17 is supported over substantially the entire range from the proximal end side to the distal end side.

When tilting the cargo box 8 to the right side, the lashing pin 17 of the hinge 3 on the port side can be removed and the hydraulic cylinder 27 can be extended. Since it can swing freely around the 19th section, it swings counterclockwise with the extension of the hydraulic cylinder 27 and is released from the support pin 4. (See the two-dot chain line in Figure 3) On the other hand, on the starboard side hinge (symmetrical to Figure 3), the lashing pin 1
7 prevents the movable member 12 from swinging, and the movable member 12 is reliably supported and secured by its securing portion 22 and arcuate portion 15. Note that the tip of the lashing pin 17 is inserted into the insertion hole 2.
Since the base end side is supported by the support part 30 and support part 18 in the upper half of 0, and by the insertion hole 20 itself, it is difficult to receive a local concentrated load.

As described above, according to the present invention, the engagement piece is composed of a fixed member and a movable member, the movable member has the insertion hole and the support portion for the lashing pin, and the fixed member has the support portion for the lashing pin. By providing this, a simplified hinge can be provided without imposing an unreasonable load on the lashing pin.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is an explanatory diagram of the operation during side dumping, FIG. 2 is a side view of the main parts,
Figure 3 is a partially cutaway front view. 1... Vehicle chassis, 3... Hinge, 4... Support pin, 10...
Engagement piece, 11... Fixed member, 12... Movable member, 17
... Lashing pin, 18... Support part, 20... Insertion hole, 30
...Support part.

Claims (1)

[Claims] 1 Support pins are provided at four locations on both the front and rear sides of either the bottom of the cargo box or the vehicle chassis, and engagement pieces that engage with the support pins are provided at four locations on the other front and back sides, and the support pins and the engagement pieces are connected by the lashing pins. In a side dump truck or three-turn dump truck that is secured to each other to form a hinge, the engagement piece is composed of a fixed member and a movable member pivotably supported on the fixed member, and A hinge operating device for a side dump truck or three-turn dump truck, wherein the movable member is provided with a lashing pin insertion hole and a support portion, respectively.