JPH0329502Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a locking device for locking the side gate and rear gate of, for example, one-sided and three-sided loading platforms having side gates and rear gates.

2. Description of the Related Art For example, a vehicle having a cargo platform that opens on three sides is configured such that a side gate and a rear gate are locked by a single locking device at the rear end of the cargo platform. As shown in FIG. 4, the lock device has a pair of hooks 1 and lock levers 2, and the hooks 1 are provided, for example, at the rear end of the side gate 3.
A lock lever 2 is provided on a rear gate 4. The hook 1 is curved into an L-shape, and is fixed to the rear end surface of the side gate 3 with its outer side open. The lock lever 2 is bent into a rectangular shape, and has one end attached to an operating lever 6 rotatably attached to the inner end of the base plate 5, and the other end inserted through a slit 7 formed in the side wall 5a of the base plate 5. There is. One end of the base plate 5 is rotatably attached to the rear gate 4. Further, the base plate 5 is formed with an elongated hole 8 through which the hook 1 can pass.

The locking device is configured such that when the side gate 3 is erected, the rear gate 4 is erected, and the operating lever 6 is pulled toward the user, the base plate 5 is pressed toward the side gate 3, and the hook 1 provided on the side gate 3 is pressed. is projected from the elongated hole 8 of the base plate 5, and then the lock lever 2 is pushed into the hook 1. Thereafter, the operating lever 6 is rotated and pressed toward the rear gate 4, thereby moving the lock lever 2 toward the rear gate 4, pulling the hook 1, and locking the side gate 3 and the rear gate 4. To release the lock, perform the opposite operation to the above.

Problems to be Solved by the Invention In the locking device, the hook 1 does not pass through the elongated hole 8 of the base plate 5 unless the side gate 3 and rear gate 4 are securely abutted against each other.
Moreover, the lock lever 2 is also constructed so that it cannot engage with the hook 1. Therefore, when locking, the side gate 3 and the rear gate 4 must be butted against each other, but the side gate 3 and the rear gate 4 deform slightly when opening and closing, or deform due to the load of luggage, etc. The side gate 3 and the rear gate 4 do not butt against each other, resulting in an opening, which often makes it impossible to lock the side gate 3 and the rear gate 4. This requires strong force to butt the side gate 3 and rear gate 4, making locking work difficult and difficult for people with weak strength to lock. There was a problem that I was told could not be done.

Means for Solving the Problem This invention has a hook fixedly attached to one gate, a rotatably provided lock lever that engages with the hook on the other gate, and a spring that constantly presses the lock lever in the locking direction. The hook is also stopped at a predetermined position by a stopper, and the hook has an engagement recess on the upper surface near the rear part, and the upper surface is tapered upward gradually rising from the rear end toward the engagement recess. and the side surface from the engagement recess toward the rear end is curved toward the other gate side as a side guide surface, and the lock lever has an engagement portion extending downward at the end facing the hook. It has a shape with an upwardly sloped taper formed on the lower surface.

Function: With this device, for example, if the gate with the hook attached is erected, and then the gate with the lock lever attached is erected, the lock lever will be guided by the curved surface of the hook and the rising guide surface and will engage with the hook. At the same time, pull the hook to correct both gates to their normal state and lock them.

Embodiment FIGS. 1 and 2 are drawings showing an embodiment of the present invention. In the figures, 10 is a side gate of a loading platform, and 11 is a rear gate. 12 is a hook provided on the side gate 10, as shown in FIG. 3, an engaging recess 13 is integrally formed near the rear end;
The upper surface of the engagement recess 13 is formed into a tapered guide surface 14 rising from the rear end, and the front part of the engagement recess 13 is bent into a crank shape, and the rear end is curved toward the rear gate 11 to form an arc-shaped guide surface 14. A guide surface 15 is formed. The hook 12 is fixed to the side gate 10 so that the rear end engaging recess 13 protrudes rearward from the rear end of the side gate 10 and is positioned behind the rear gate 11.

Reference numeral 16 designates a lock lever provided on the rear gate 11, which is integrally formed with an engaging portion 17 extending downward at its tip facing the hook 12, and has a lower surface of the engaging portion 17 formed into a tapered surface 18 with an upward slope. An arcuate groove 19 is formed on the upper surface of the intermediate portion. Further, a bush 20 is passed through the rear portion of the lock lever 16 and is integrally connected thereto. The lock lever 16
is arranged so that the engaging part 17 protrudes from the end of the rear gate 11 and engages with the engaging recess 13 of the hook 12 in a substantially horizontal state, and the bush 20 attached to the lock lever 16 is fixed to the rear end surface of the rear gate 11. The base plate 21 is rotatably fitted onto a pivot shaft 22 protruding from approximately the center of the base plate 21. Reference numeral 23 denotes a coil spring fitted into the bush 20 of the lock lever 16. One end 23a of the coil spring 23a is bent and engaged with the arcuate groove 19 on the upper surface of the lock lever 16, and the other end is brought into pressure contact with the rear gate 11. The rotational force is always applied in the locking direction (clockwise in FIG. 1). 24
is a stopper formed on the base plate 21,
The lock lever 16 is held in a substantially horizontal position.

Reference numeral 25 designates an operating lever for rotating the lock lever 16, which is formed into a U-shape in cross section and whose lower end is formed into an arcuate surface. This operation lever 25 is rotatably connected to a pivot 26 protruding from the rear of the base plate 21, and its tip is connected to the lock lever 16.
It is placed overlappingly above the . 27
A supporting piece formed on the base plate 21 supports the operating lever 25 in the locked position.

Reference numeral 28 denotes a cover that covers the pivot joints of the lock lever 16 and the operating lever 25.

In the above locking device, when the side gate 10 is raised and the rear gate 11 is raised, the engaging portion 17 of the lock lever 16 first engages with the rear end of the hook 12 as the rear gate 11 is raised, and its guide surface 15, the hook 12 is pulled, forcing the side gate 10 to abut against the rear gate 11, and the lock lever 16 is guided by the rising guide surface 14 of the hook 12 and rotates counterclockwise against the spring 23. When the rear gate 11 completes its upright operation, avoiding interference with the hook 12, it climbs over the ascending guide surface 14, is rotated in the locking direction by the elasticity of the spring 23, and the engaging portion 17 engages with the engaging recess 13. side gate 10 and rear gate 1
1 and lock.

Furthermore, locking can also be achieved by raising the side gate 10 while the rear gate 11 is raised. That is, after raising the rear gate 11,
When the side gate 10 is raised, the hook 12 contacts the lock lever 16 and then presses the tapered surface 18 to rotate the lock lever 16 counterclockwise to avoid interference between the hook 12 and the lock lever 16, and the side gate 10 is raised. Finish standing up and lift 1
2 gets over the engaging portion 17 of the lock lever 16, the lock lever 16 rotates in the locking direction, the engaging portion 17 engages with the engaging recess 13, and the side gate 10 and rear gate 11 are locked.

To release the lock, simply push up the end of the operating lever 25 that protrudes from the cover 28. That is, when the operating lever 25 is pushed up and rotated clockwise, its tip will touch the locking lever 16.
The end of the lock lever 16 is pushed down and rotated counterclockwise against the spring 23 to disengage the lock lever 16 and the hook 12 and release the lock. After that, by folding down the rear gate 11 or side gate 10, the cargo platform is opened. When the rear gate 11 or side gate 10 is opened, if the pushing force on the operating lever 25 is removed, the lock lever 16 is rotated clockwise by the spring 23, but the stopper 2
It is held in place at 4.

In addition, since the rotation direction of the lock lever 16 in the above-mentioned locking device is changed to the opposite direction by the operating lever 25, when the lock is released, the protruding end of the operating lever 25 only has to be pushed upward, and the locking device is placed at a high position on the loading platform. It has become easier to operate as it has been installed in
Improves operability.

In addition, in the above embodiment, a hook is provided on the side gate and a lock lever is provided on the rear gate.
Conversely, a lock lever may be provided on the side gate and a hook may be provided on the rear gate.

Further, the above-mentioned locking device can be used not only for locking a cargo platform that opens on three sides but also for a cargo platform that has only a rear gate that opens on one side.

Effects of the invention In this invention, the rear gate is raised after the side gate is raised, or if the side gate is raised after the rear gate is raised, the lock is automatically applied, and the side gate opens at the same time as the locking. Since the lock is automatically corrected and reliably locked, the work is very easy and reliable, and even a person with weak strength can lock the lock reliably.

[Brief explanation of drawings]

FIG. 1 is a front view of a locking device according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view of a hook, and FIG. 4 is a perspective view of essential parts of a conventional locking device. 10...Side gate, 11...Rear gate,
12...Hook, 16...Lock lever, 21...
...Base plate, 23...Spring, 24...
...Stopper, 25...Operation lever.

Claims (1)

[Scope of utility model registration request] It is fixed to one gate of a loading platform having a side gate and a rear gate, has an engaging recess on the upper surface near the rear, and has a tapered rising guide surface whose upper surface gradually rises from the rear end toward the engaging recess. and a hook having a side guide surface in which the side surface facing the rear end from the engagement recess is curved toward the other gate, and a hook rotatably attached to the other gate and having an end facing the hook. A lock lever integrally formed with an engaging portion extending downward, the lower surface of the engaging portion being tapered, a spring that constantly rotates the lock lever in the locking direction, and a stopper that stops the lock lever at a predetermined position, A gate lock device for a loading platform, characterized in that the engaging portion of the lock lever is engaged with the engaging recess of the hook.