JPS6236896B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo box safety support device for a cargo box tilting vehicle.

Generally, for vehicles with tilting cargo boxes such as rear dump trucks and tri-turn dump trucks, maintenance and inspection work may be performed between the cargo box and the vehicle body frame with the hydraulic cylinder extended and the cargo box tilted. When carrying out work, there is a possibility that the hydraulic cylinder may contract unexpectedly due to incorrect operation, etc., and the cargo box may fall, so a support rod is installed between the cargo box and the vehicle body frame to ensure safe work. There is. Conventionally, one or two support rods are provided in a side dump truck or tri-turn dump truck, while two or three receiving members into which the tips of the support rods are inserted are provided on the back of the cargo box to hold the load. Depending on the direction in which the box is tilted, the tip of the support rod is inserted into the receiving member corresponding to the direction in which the box is tilted. However, this has problems such as an increase in the number of parts, an increase in overall weight, and an increase in manufacturing cost.

The present invention has been made in view of this point, and by providing one receiving member into which the tip of the support rod can be inserted no matter which direction the cargo box is tilted, it is possible to safely support the cargo box and The present invention provides a cargo box safety support device for a cargo box tilting vehicle with a reduced number of parts.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

As shown in Figures 1 to 3, reference numeral 1 is a cargo box tilting vehicle, in which a cargo box 3 mounted on a vehicle body frame 2 can be tilted backward and to both sides, and the loaded items can be discharged in three directions. It is a three-turn dump truck. A dump cylinder is connected between the vehicle body frame 2 and the cargo box 3, and a hinge switching operation mechanism is provided to selectively tilt the cargo box 3 rearward or sideways around hinge pins A and B. is provided.

The cargo box tilting vehicle 1 is provided with a cargo box safety support device 4 that prevents the cargo box 3 from dropping unexpectedly due to erroneous operation.
The cargo box safety support device 4 is provided with a support rod 5 on the vehicle body frame 2 and a receiving member 6 on the cargo box 3. Two support rods 5 are provided on both sides of the vehicle body frame 2, and a U-shaped connecting rod 7 is connected to the base end of each support rod 5 at both ends thereof, and the tip end thereof is formed to be slightly tapered. On the other hand, the connecting rod 7 is attached to the vehicle body frame 2.
A U-shaped connecting rod 8, which is loosely passed through, is connected at both ends thereof, and the support rod 5 is held on the vehicle body frame 2 so as to be rotatable in the longitudinal and lateral directions. The receiving member 6 is located on the vertical center axis on the back surface of the cargo box 3, and is positioned rearward from the connection part between the support rod 5 and the vehicle body frame 2 (the mounting part of the connection rod 8) when the cargo box 3 is tilted backward. It is located protrudingly. The receiving member 6 is formed into a cylindrical shape with an open bottom, and a cutout groove 9 is provided at the lower front part.
The lower end is open so that the tip of the support rod 5 can pass therethrough, and the tip is inserted into the receiving member 6. Further, a relief portion 10 is formed in the lower rear portion of the receiving member 6 by partially cutting it out so as not to interfere with the supporting rod 5. 11 is the car body frame 2
This is a holder provided in the holder for storing and holding the support rod 5 in a horizontal state.

Next, to explain the operation of the support rod 5, when the cargo box 3 is tilted backward around the hinge pin A,
Remove either the left or right support rod 5 from the holder 11, rotate it upward, and cut out the tip of the rod into the groove 9.
is inserted into the receiving member 6 (see solid line in FIG. 1). In this state, the support rod 5 is held tilted slightly backward and inward toward the tip (upper end), and if the cargo box 3 suddenly falls, the support rod 5
The tip of the support member 6 contacts the upper front part of the receiving member 6 to reliably support the cargo box 3 (see the two-dot chain line in FIG. 1).

When the cargo box 3 is tilted to the right around the hinge pin B, the right support rod 5 is removed from the holder 11, rotated upward and to the right, and its tip is passed through the cutout groove 9, and the support rod 5 is removed from the holder 11. 6 (see solid line in Figure 3). In this state, if the packing box 3 suddenly falls, the tip of the support rod 5 will come into contact with the side inside the receiving member 6, as described above, and the packing box 3 will be reliably supported (lined in two-dot chain line in Fig. 3). reference). Furthermore, when the cargo box 3 is tilted to the left, the tip of the right support rod 5 is inserted into the receiving member 6 in the same manner.

In this embodiment, two support rods 5 are provided, but only one support rod 5 is provided, and the tip of the support rod 5 is inserted into the receiving member 6 when the cargo box 3 is tilted in each direction. You can also do this. Moreover, although the receiving member 6 is formed into a cylindrical shape, it may be formed into a polygonal cylindrical shape such as a square. Furthermore, although this embodiment has been described with respect to a three-turn dump truck, it may also be applied to a side dump truck.

As described above, according to the cargo box safety support device for a cargo box tilting vehicle of the present invention, a support rod is provided on the vehicle body frame, and one cylindrical receiving member is provided on the back surface of the cargo box, and the front lower part of the receiving member is provided with a support rod on the vehicle body frame. By providing a cutout groove on the side of the vehicle through which the tip of the support rod can pass, it is possible to reliably prevent the cargo box from dropping unexpectedly, allowing maintenance and inspection work to be carried out safely between the cargo box and the vehicle body frame. It can be carried out. In addition, the support rod is securely supported above the front of the cylinder of the receiving member when the box is tilted backwards, and at the inside of the cylinder of the receiving member when the box is tilted sideways, so even if a load is applied unexpectedly due to the downward movement of the cargo box, it will not be affected. It does not come off and the mounting position of the receiving member is not restricted. Furthermore, even when a single receiving member is used, the tip end of the support rod can be inserted into the receiving member via the notch groove with substantially the same trajectory even when the cargo box is tilted in any direction. Therefore, the operation is simple, the number of parts is reduced, the structure is significantly simplified, the overall weight is reduced, and it can be manufactured at low cost.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a side view of the cargo box safety support device when the cargo box is tilted backwards, FIG. 2 is an enlarged front view of the receiving member, and FIG. FIG. 3 is a front view of the cargo box safety support device when tilted to the right. 1... Loading box tilting vehicle, 2... Vehicle body frame, 3... Loading box, 4
...Cargo box safety support device, 5...Support rod, 6...Receiving member, 9...Notch groove.

Claims (1)

[Scope of Claims] 1. A support rod is held in the vehicle body frame at its base end so as to be rotatable in the front and rear and left and right directions, while a cylindrical support rod is provided on the back surface of the cargo box facing the tip of the support rod. 1. A cargo box safety support device for a side dump truck or a tri-turn dump truck, characterized in that a receiving member is provided, and a cutout groove is formed in the lower front part of the receiving member, through which the tip of the support rod passes. 2. The cargo box safety support device for a side dump truck or tri-turn dump truck according to claim 1, wherein two support rods are provided on both sides of the vehicle body frame.