JPS6357251B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a front dump prevention device for preventing a cargo box from tilting forward in a side dump truck or a three-turn dump truck.

Conventionally, side dump trucks or tri-turn dump trucks have been known in which the direction of tilting of a cargo box can be changed by replacing two lashing pins with engaging pieces. After inserting the engagement pieces into the insertion holes at the left and right positions at the same time,
When attempting to dump the cargo box, the cargo box would tilt forward, which was extremely dangerous.

In order to solve the above-mentioned conventional problems, this invention makes it impossible to simultaneously insert two lashing pins into the insertion holes of the engagement pieces located at the front left and right positions.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a chassis of a three-turn dump truck. A girder 2 is fixed to the front part of the chassis 1, and a circular pipe 3 is rotatably supported at the rear part of the chassis 1. There is. 4 and 5 are support pins attached to both left and right ends of the beam member 2; 6 and 7 are support pins attached to both left and right ends of the circular tube 3; and support pins 4 and 5 are located at the front of the bottom of the cargo box 8. The support pins 6, 7 are appropriately engaged with two-pronged engagement pieces 9, 10 fixed to both left and right ends, and the support pins 6, 7 are fitted with two-pronged engagement pieces 11, 12 fixed to both rear left and right ends of the bottom of the cargo box 8. It is adapted to be engaged with as appropriate. and engaging pieces 9,1
0, 11 and 12 are respectively formed with insertion holes 15, 15 for lashing pins 13, 14, and
The two lashing pins 13 and 14 are connected to the engagement piece 9,
10, 11, 12, respectively insertion holes 15, 15
By inserting the support pins 4, 5,
6, 7 and the corresponding engaging pieces 9, 10,
A dump hinge is constructed by tying any two of 11 and 12 together.

Blocking members 16 and 17 are attached to the outside of the engagement pieces 9 and 10 so as to be movable left and right, and are connected by a shaft 18, and engage one of the lashing pins 13 as shown in FIG. Insertion hole 15 of piece 10
When the locking pin 14 is inserted into the insertion hole 15 of the engagement piece 9, the blocking members 16 and 17 move to the right via the shaft 18. Insertion of the binding pin 14 is prevented.

Note that 19 is a dump cylinder interposed between the vehicle chassis 1 and the cargo box 8.

Next, to explain the operation of the present invention, the packing box 8
When tilting the cargo box 8 backward, the lashing pins 13 and 14 are inserted into the insertion holes 15 and 15 of the engagement pieces 11 and 12, respectively, with the cargo box 8 placed on the vehicle chassis 1. , 12 and the support pins 6, 7 and then extend the dump cylinder 19, the cargo box 8 tilts rearward about the circular tube 3 as shown in FIG.

Next, when tilting the cargo box 8 to the right side, insert the lashing pins 13 and 14 into the insertion holes 1 of the engagement pieces 10 and 12.
5, 15 to engage the engaging pieces 10, 12 and the support pins 5, 7 with each other, and then extend the dump cylinder 19. As shown in FIG. Tilt to the right around . In addition, when tilting the cargo box 8 to the left side, the cargo box 8 can be supported by inserting the lashing pins 13 and 14 into the insertion holes 15 and 15 of the engaging pieces 9 and 11 and then extending the dump cylinder 19 as described above. It tilts to the left around pins 4 and 6.

Next, if the lashing pins 13 and 14 are inserted into the insertion holes 15 and 15 of the engagement pieces 9 and 10 located at the front left and right positions, respectively, the lashing pin 13 is inserted into either one of the insertion holes 15. Then, the other lashing pin 14 is prevented from being inserted into the other insertion hole 15 by the blocking member 16 or 17, so that the lashing pin 14 cannot be inserted.
3 and 14 are insertion holes 1 for the front left and right engaging pieces 9 and 10
5 and 15 at the same time, thereby preventing the cargo box 8 from tipping forward due to erroneous operation.

Although the present invention has been described above as applied to a three-turn dump truck, the same effects can be obtained when applied to a side dump truck.

As explained above, according to the present invention, it is impossible to simultaneously insert the two lashing pins into the insertion holes of the engagement pieces located at the front left and right positions, which prevents the cargo box from tipping forward due to erroneous operation, resulting in safety. , damage to the vehicle chassis or cargo box can be prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory diagram of the operation during side dumping, FIG. 2 is an explanatory diagram of the operation during rear dumping, FIG. 3 is a plan view with the cargo box omitted, and FIG. 4 is an explanatory diagram of the operation during side dumping. 5 is an enlarged view showing the state in which the blocking member is attached, and FIG. 5 is a partially omitted perspective view showing the state in which the blocking member is attached. 1... Vehicle chassis, 4, 5, 6, 7... Support pin, 8
... Packing box, 9, 10, 11, 12 ... Engagement piece, 1
3, 14... lashing pin, 15, 15... insertion hole,
16, 17... blocking member, 18... shaft.

Claims (1)

[Claims] 1 Support pins are provided at four locations on both 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 insertion holes for lashing pins are provided in the engagement pieces. are provided respectively, and a lashing pin is inserted into any two of the insertion holes,
In a side dump truck or a three-turn dump truck in which the support pin and the engagement piece are tied to each other by the lashing pin to form a hinge, the lashing pin is attached to the outside of the engagement piece at the two front left and right places. By providing blocking members to prevent the insertion of the lashing pins, and allowing the blocking members to move horizontally in conjunction with each other, when the lashing pin is inserted into one of the insertion holes, one of the blocking members prevents the insertion of the lashing pin. 1. A front dump prevention device for a side dump truck or a three-turn dump truck, characterized in that the other blocking member moves outward from the other insertion hole to prevent the lashing pin from being inserted.