JPS6329652B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hinge operating position 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 tri-turn dump trucks have been known in which the tilting direction of a cargo box can be changed by replacing two lashing pins with engaging pieces. When attempting to dump the cargo box after inserting it into the engaging piece at the corner position, there was a risk that the cargo box or the chassis would be damaged.

In order to solve the above-mentioned conventional problems, this invention makes it impossible to simultaneously insert two securing pins into engagement pieces located at diagonal 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 beam member 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. . 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. Appropriately engages with bifurcated engagement pieces 9 and 10 fixed to both left and right ends,
The support pins 6 and 7 are adapted to appropriately engage with two-pronged engagement pieces 11 and 12 fixed to both rear left and right ends of the bottom of the cargo box 8. The engaging pieces 9, 12 and 10, 11 at the diagonal positions are respectively formed with insertion holes 13, 14 having irregularly shaped grooves as engaged parts as shown in FIG. , two lashing pins 15, 1 having irregularly shaped protrusions as engaging portions corresponding to these insertion holes 13, 14.
6 are provided, and these two lashing pins 1
By inserting the support pins 4, 5, 6, 7 and the corresponding engagement pieces 9, 10, 11 into the insertion holes 13, 14 of the engagement pieces 9, 10, 11, 12, , 12 are secured to each other to form a dump hinge. Note that 17 is a dump cylinder interposed between the 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 16 and 15 are inserted into the insertion holes 14 and 13 of the engagement pieces 11 and 12 with the cargo box 8 placed on the vehicle chassis 1. 12 and the support pins 6 and 7 are engaged with each other,
After that, when the dump cylinder 17 is extended, 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 15 and 16 into the insertion holes 1 of the engagement pieces 12 and 10.
3 and 14 to engage the engaging pieces 12 and 10 and the support pins 7 and 5 with each other, and then the dump cylinder 1
7, the cargo box 8 tilts to the right around the support pins 5 and 7, as shown in FIG.
When the cargo box 8 is tilted to the left, the lashing pins 15 and 16 are inserted into the insertion holes 1 of the engagement pieces 9 and 11 as described above.
3 and 14 and then extend the dump cylinder 17, the cargo box 8 tilts to the left around the support pins 4 and 6.

Next, if the lashing pins 15, 16 are inserted into the diagonally located engagement pieces 9, 12 or 10, 11, respectively, the diagonally located engagement pieces 9,
Since grooves of the same shape are formed in 12, 10, and 11, the lashing pin 1 has an irregularly shaped protrusion.
Either one of the locking pins 5 and 16 cannot be inserted, so that the lashing pins 15 and 16 are connected to the diagonally opposite engagement pieces 9 and 16, respectively.
12 or 10 and 11 at the same time, it is possible to prevent damage to the vehicle platform 1 and cargo box 8 due to erroneous operation.

Further, when the lashing pins 15 and 16 are rotated after being inserted into the insertion holes 13 and 14, the protrusions formed on the lashing pins 15 and 16 are inserted into the lashing pins 1 and 16 as shown in FIG.
It also acts as a retaining piece for the lashing pins 5 and 16, and prevents the lashing pins 15 and 16 from falling off during dumping or traveling. Further, the shape of the engaging portion such as the protrusion is not limited to the shape of this embodiment, and may be any shape as long as the lashing pin can correspond only to the engaged portion at the diagonal position.

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, two lashing pins cannot be simultaneously inserted into the insertion holes of the engagement pieces located at diagonal positions, so damage to the vehicle platform or cargo box due to erroneous operation 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 5 is an enlarged partial cross-sectional view showing the lashing state of the engagement piece and the support pin, and FIG. 5 is an enlarged view showing the attachment relationship between the engagement piece and the lashing pin. 1... Vehicle chassis, 4, 5, 6, 7... Support pin, 8
... Packing box, 9, 10, 11, 12 ... Engagement piece, 1
3, 14...insertion hole, 15, 16...lashing pin.

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 the side dump truck or three-turn dump truck, the support pin and the engagement piece are tied together by the lashing pin to form a hinge.
an engaging portion having a different shape is formed on each of the lashing pins, and an engaged portion corresponding to the engaging portion of the lashing pin is formed on the engaging piece, and the engaging piece is located at a diagonal position. A hinge operating device for a side dump truck or a tri-turn dump truck, in which the two securing pins cannot be inserted into insertion holes located at diagonal positions at the same time by aligning the engaged portions of the two.