JPS604824Y2 - Lashing device for dump cargo boxes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lashing device for a dump box, which reliably prevents the box from flying up due to vibrations caused by a dump truck or the like running.

Generally, lashing devices that use hooks to secure dump boxes have the advantage of being able to reliably prevent the boxes from flying up while driving, but they also have very troublesome problems when it comes to operation. There is.

In other words, when dumping a cargo box, it is necessary to manually disengage the hook and maintain that state to perform the dumping operation, and when the cargo box is lowered, the hook must be returned to the engaged position. It is necessary to perform rotation operation.

The present invention solves the above-mentioned problems as much as possible, and embodiments will be described below with reference to the drawings.

1 is a chassis frame, 2 is a subframe provided on the chassis frame 1, and 3 is a cargo box mounted on the subframe 2, which can be dumped rearward around a hinge section 4 at the rear end. .

An engaging member such as a lock pin 6 that protrudes laterally is attached to the side surface of the main girder 5 of the cargo box 3, and the lock pin 6 is attached to the side surface of the subframe 2 corresponding to the lock pin 6 by the force of a spring 7. A hook 8 that engages with is supported by a shaft 9 and a bearing 10 so as to be able to swing back and forth.

An inclined surface 11 that slopes rearward and downward is formed on the upper surface of the head of the hook 8, and when the cargo box 3 is lowered, the lock pin 6 comes into contact with the inclined surface 11, thereby causing the hook 8 to resist the force of the spring 7. When the cargo box 3 is fixed on the sub-frame 2, the lock pin 6 passes through the head, allowing the hook 8 to engage with the lock pin 6.

Reference numeral 12 denotes a restraining piece located slightly in front of the hook 8 and pivotally supported by a mouth-shaped bracket 13 fixed to the lower surface of the cargo box 3 so as to be able to swing back and forth. is pivoted so that it can be moved freely.

A stopper piece 15 is fixed to the front surface of the bracket 13, and when a rotational force acting backward from the hanging position of the restraint piece 12 is applied, the upper part of the restraint piece 12 comes into contact with the stopper piece 15, causing the restraint piece 12 to rotate backward. The forward movement of the restraining piece 12 is restricted, and the restraining piece 12 can freely rotate forward.

16 is a locking arm that is bent into a dogleg shape and whose base end is fixed to the side surface of the hook 8. When the locking arm 16 rotates forward, the tip of the locking arm 16 touches the roller 14. The locking arm 16 is able to move forward of the restraining piece 12 by making contact and pushing the restraining piece 12 forward.

Reference numeral 17 denotes an operating lever for rotating the hook 8. This operating lever 17 is fixed to the shaft 9, and the acting force of the operating lever 17 is transmitted to the hook 8 via the shaft 9.

In addition, 19 indicates a stopper fixed to the base of the hook 8,
When this stopper 19 collides with another stopper piece 20 protruding from the side surface of the subframe 2, it holds the hook 8 vertically and allows engagement with the lock pin 6.

With the above configuration of the present invention, when the operating lever 17 is rotated forward from the position shown by the solid line in FIG. Rotate.

When the locking arm 16 begins to rotate, the tip of the locking arm 16 first collides with the roller 14 at the bottom of the restraint piece 12, thereby causing the restraint piece 12 to rotate forward.

When the restraint piece 12 is rotated further forward from the two-dot chain line position, the engagement between the restraint piece 12 and the locking arm 16 is released, and the locking arm 16 is positioned in front of the restraint piece 12. At this time, The restraint piece 12 rotates rearward again by its own weight and returns to the vertical solid line position.

After that, when the operation lever 17 is released, the hook 8
Due to the force of the spring 7, the locking arm 16 is moved to the position shown by the solid line in FIG.
The hook 8 rotates to the position where it engages again with the restraining piece 1.
2, it is stopped and held at this position.

When the cargo box 3 is dumped in the above state, the restraint piece 12 rises together with the cargo box 3. When the restraint piece 12 rises to a predetermined height, it disengages from the locking arm 16, so that the hook 8 and The locking arm 16 is positioned at 2 in FIG.
It is rotated to the dot-dashed line position, that is, the position where engagement with the lock pin 6 is possible.

Next, when the rising cargo box 3 descends, the lock pin 6 on the cargo box 3 side first collides with the inclined surface 11 of the hook 8, and as a result, the hook 8 rotates slightly forward against the force of the spring 7. The lock pin 6 can be moved downward.

After that, when the cargo box 3 is fixed on the subframe 2, the hook 8 that has been rotated forward is rotated backward again by the force of the spring 7. At this time, the hook 8 and the lock pin 6 are engaged, and the cargo box 3 is It will definitely be tied down.

In the above embodiment, the hook 8 is placed on the chassis frame 1 side.
Although the lock pin 6 and the restraining piece 12 are respectively attached to the cargo box 3 side, it would be satisfactory even if they were reversed.

Furthermore, although the locking arm 16 is attached to the hook 8, the shaft 9
It can also be installed on.

Furthermore, in the embodiment described above, the hook 8 is held in a position where the engagement with the lock pin 6 is released by engaging the locking arm 16 with the restraining piece 12. Locking arm 16 by direct engagement
It is also possible to create a structure that eliminates the .

As described above, in the present invention, once the hook is moved to the position where it is disengaged from the lock pin, the hook is automatically held in the disengaged position, making subsequent dumping operations of the cargo box easier. If the cargo box rises further, the hooks will automatically rotate to a position where they can be engaged, so if the cargo box descends and settles on the chassis frame, the lock pins and hooks will automatically engage. This will ensure that the cargo box is securely secured.

[Brief explanation of drawings]

Figure 1 is an overall side view of a dump truck equipped with the lashing device of the present invention, Figures 2 and 3 are side views of the main parts of the present invention,
FIG. 4 is a longitudinal sectional view of FIG. 2. 1 is a chassis frame, 3 is a cargo box, 6 is a lock pin, 7 is a spring, 8 is a hook, 12 is a restraining piece, and 16 is a locking arm.

Claims (1)

[Scope of utility model registration request] A hook capable of engaging with an engaging member provided on the other side is rotatably provided on either the chassis frame side or the cargo box side, and the head of the hook is capable of contacting the engaging member when the cargo box is lowered. In addition to providing an inclined surface, a part of the hook is provided with a spring that biases it in the direction of engagement with the engagement member, and further provided with a stopper piece that restricts rotation of the hook beyond the engagement position with the engagement member, - At a position on the side having the force engaging member in the direction in which the hook can rotate, the hook can be rotated in the same direction as the hook, and can be rotated in a different direction by a stopper piece. By providing a restraining piece to be regulated and rotating the hook, the hook disengages from the retaining member and engages with the restraining piece, and as the cargo box rises, the hook engages with the restraining piece. A lashing device for a dump cargo box, characterized in that it can be released from engagement with a locking member and returned to a position where it can be engaged with a retaining member.