JPH0443399Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a locking device for a tailgate that is screwed to the rear end of a cargo box mounted on the body frame of a cargo vehicle so that it can be opened and closed. .

(Prior Art) Conventionally, in the above-mentioned locking device, an operation lever for operating a latch that is engaged with a receiver provided on the tailgate is pivotally supported on the side of the cargo box, and when the tailgate is closed, the operation lever is The tailgate was secured by tilting the lever parallel to the tailgate.

(Problem to be solved by the invention) However, in the conventional locking device described above, when the tailgate is unlocked, the latch and the operating lever protrude rearward from the rear end of the cargo box, which interferes with the operation. Not only that, but even if the locking device was moved forward so as not to get in the way, when the cargo box was tilted to unload the cargo, the locking device could unexpectedly return to the protruding position and come into contact with the cargo, causing damage. .

The present invention has been proposed in view of the above, and is intended to provide a tailgate locking device for a freight vehicle that can solve the above-mentioned problems of conventional devices.

(Means for solving the problem) A cargo box is mounted on the body frame of a cargo vehicle, and one end of a hook is rotatably pivoted to a bracket fixed to the rear side of the cargo box, and the tail An operating lever, which has a locking member fixed at its tip that engages with a receiving metal fitting fixed to the rear surface of the gate, is rotatably connected to the other end of the latch fitting, and cooperates with both the metal fittings to open the tailgate. In the locking device for securing the tailgate in the closed position, a support groove is provided in front of the pivot portion on the upper surface of the bracket, and when the tailgate is unlocked, the tailgate rotates forward and locks into the support groove. It was designed to be stored.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. A cargo box 2 is mounted on the body frame 1 of a freight vehicle, which is generally designated by the symbol V. A tailgate 3 is screwed 4 so that it can be opened and closed.

One end of a rectangular frame-shaped latch 6 is pivoted 7 to the side wall 2a of the cargo box 2 via a bracket 5 so as to be rotatable around a vertical axis, and the other end of the latch 6 has an operating lever 8. A cylindrical portion 8' formed at the tip thereof is rotatably connected 9. A locking member 10 is integrally fixed to the tip of the operating lever 8, and this locking member 10 has a pair of arms 11 fixed to both ends of the cylindrical portion 8', and a pair of arms 11 fixed to both ends of the tubular portion 8'. It is composed of a shaft body 12 fixed between the tips thereof, and a locking roller 13 rotatably fitted to this shaft body 12.

On the other hand, a stiffener 14 fixed to the outer side edge of the tailgate 3 has a receiving metal fitting 1 having a substantially C-shaped cross section.
5 is fixed, and a hook portion 16 is formed at the edge of this receiving metal fitting 15, with which the locking roller 13 of the locking member 10 can be engaged.

In the figure, 17 is a reinforcing member integrally formed with the receiving metal fitting 15, and 18 is a sealing member.

Incidentally, a support groove 19 having approximately the same width as the latch 6 is formed in front of the pivot joint 7 on the upper surface of the bracket 5, and the unlocked latch 6 is inserted into the support groove 1.
It is configured so that it can be stored in 9.

Next, the operation of the embodiment of the present invention will be explained.

Now rotate the latch fitting 6 to the rear of the cargo box 2, engage the locking roller 13 of the locking member 10 with the hook portion 16 of the receiving metal fitting 15, and then move the operating lever 8 to the second position using the engaging portion as a fulcrum. If the tailgate 3 is rotated toward the rear surface as shown by arrow A in FIG. Moving to the tailgate 3 side, the latch 6 and the locking member 10 forming the toggle link mechanism cooperate with the receiver 15 to lock the tailgate 3 in the closed position as shown in FIG. The operating lever 8 can be stored and held at the rear of the tailgate 3 substantially parallel to the outer surface of the gate 3.

Furthermore, in order to unlock the tailgate 3, it is sufficient to rotate the operating lever 8 in the direction of the arrow B in FIG.
2 and move toward the tailgate 3 side, as shown in FIG. 3, the locking roller 13 of the locking member 10
is removed from the hook portion 16 of the receiving metal fitting 15, and the tailgate 3 is unlocked and can be opened.

Thereafter, the latch 6 can be stored in the support groove 19 by rotating the latch 6 further forward until it becomes parallel to the side wall 2a and dropping it downward. Thereafter, the cargo can be unloaded by tilting the cargo box 2.

The tailgate can also be locked in its original closed position by performing the reverse operation.

(Effects of the invention) As described above, according to the invention, after the tailgate is unlocked, the latch of the locking device can be placed on the side of the side wall of the cargo box and stored and held almost parallel to the side wall of the side wall. The latch and operating lever of the locking device do not protrude rearward beyond the rear surface of the cargo box, allowing safe loading and unloading of cargo, and also helps improve the durability of the locking device.

[Brief explanation of the drawing]

Fig. 1 is a side view of a freight vehicle equipped with the device of the present invention, Fig. 2 is a cross-sectional plan view of the device of the present invention when locked;
FIG. 3 is a cross-sectional plan view when unlocked, FIG. 4 is a side view when stored, and FIG. 5 is a detailed view of the support groove. DESCRIPTION OF SYMBOLS 1...Vehicle frame, 2...Cargo box, 3...Tailgate, 5...Bracket, 6...Latch fitting, 8...Operation lever, 10...Locking member, 15...Bracket fitting,
19...Support groove.

Claims (1)

[Scope of utility model registration request] A cargo box 2 is mounted on a body frame 1 of a cargo vehicle, and one end of a latch 6 is rotatably pivoted 7 to a bracket 5 fixed to the rear side of the cargo box, and attached to the rear surface of the tailgate 3. An operating lever 8 having a locking member 10 fixed to its tip that engages with a fixed receiving fitting 15 is rotatably connected to the other end of the latch 6, and cooperates with both the fittings 6 and 15. In the locking device for securing the tailgate 3 in the closed position, a support groove 19 is provided in front of the pivot portion on the upper surface of the bracket 5, and when the tailgate 3 is unlocked, it rotates forward. 1. A tailgate locking device for a freight vehicle, characterized in that the tailgate locking device is configured to move and be stored in the support groove.