JPS6154628B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gate lock device for a truck.

Conventionally, a gate lock device is provided between a cargo box and a gate of a freight vehicle, and the gate is raised and secured to the cargo box so that the rear of the cargo box can be closed. However, in the gate lock device described above, all of the lashing and releasing operations are performed manually by the operator, which makes the operation extremely complicated and is dangerous because there are cases where the operator forgets to perform the lashing operation. Furthermore, since the cargo box and the gate cannot be firmly secured, the rigidity during securing is low.
(Refer to Japanese Utility Model Publication No. 34-10913 and Japanese Utility Model Application Publication No. 54-27415 as conventional examples.) In view of this, the present invention provides a hook and a hook on either the cargo box or the side of the gate of a freight vehicle. A gate lock for a freight vehicle, in which a locking member having a lashing means is fixed to the other side with a lock pin, so that the gate can be automatically lashed to a cargo box when the gate is closed. It provides equipment.

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

As shown in FIGS. 1 to 3, numeral 1 is a cargo box mounted on a freight vehicle, and a tailgate lifter 2 is provided at the rear. The tailgate lifter 2 is configured so that the tailgate 3 is used both for closing the rear of the cargo box 1 and for lifting and lowering cargo, and the tailgate 3 is rotatably connected to the lower part of the support column 4 on both sides. and is tapered at the tip.

On the other hand, at the rear of the cargo box 1, a bracket 5 is fixedly installed on both sides of the lower part, and the bracket 5 has two arms 6.
One end is rotatably attached to the arm 6 by a pin 7, and the other ends of both arms 6 are rotatably attached to the column 4 to form a parallel link mechanism. Furthermore, a hydraulic unit 8 is attached to the lower part of the cargo box 1.
The hydraulic unit 8 includes a hydraulic cylinder and the like and is connected to the pin 7. 9 is a regulation link connected between the tailgate 3 and the support column 4;
is held in a horizontal position. Therefore, when the hydraulic unit 8 is driven, both arms 6 rotate,
The tailgate 3 is raised and lowered horizontally between the ground and the floor of the cargo box 1 to load and unload cargo, while the tailgate 3 is raised vertically at its highest position and the rear of the cargo box 1 is raised and lowered. Close.

Further, a gate lock device 10 is provided between the cargo box 1 and the tailgate 3, and the gate lock device 10 has locking members 11 on both sides of the tailgate 3 and locking pins on the rear end of the cargo box 1. 12 are arranged, and the locking member 11 is composed of a pair of support plates 13 welded to the tailgate 3, a hook 14 pivotally connected to the support plates 13, and a hook securing means 15. The front half of the tailgate 3 protrudes from the front surface of the tailgate 3.

The hook 14 engages with and disengages from the lock pin 12, is interposed between both support plates 13, and is rotatably attached to the front part of the support plate 13 by a pin 16 at a substantially central lower portion. The front part of the hook 14 protrudes forward from the support plate 13, has a U-shaped engagement groove 17, and has a lock pin 12 at the bottom.
A contact portion 18 is formed, which extends slightly forward, and a guide surface 19 extending downward from the tip is formed on the upper surface. In addition, the hook 14 has a stepped portion 20 formed at the rear thereof, and a tension spring 21 is tensioned between the upper portion and the tailgate 3, and the spring 21 always holds the lock pin 12 in the release direction (clockwise in FIG. 2). direction).

The hook securing means 15 includes a lever 23 and a stopper 24 integrally connected to a shaft 22 rotatably held by the support plate 13, and the hook 14 is moved to the engagement position with the lock pin 12 (see FIG. 2). ). The lever 23 is extended upward and curved above the support plate 13, and a grip portion 25 is formed at the end thereof, while the stopper 24 is located between the support plates 13 and engages with and disengages from the step portion 20. Furthermore, a tension spring 26 is tensioned between the shaft 22 and the tailgate 3, and the spring 26 always moves the stopper 24 in the direction of engagement with the stepped portion 20 (counterclockwise in FIG. 2). energized. 2
Numerals 7 and 28 are hook rotation regulating members fixedly provided between the support plates 13.

The lock pin 12 is protruded from the rear end surface of the side wall 29 of the cargo box 1 via a bracket 30 in correspondence with the hook 14.

Next, the locking and releasing operations of the gate lock device 10 will be explained. First, when the tailgate 3 is unlocked, such as when the tailgate 3 is horizontal, the stopper 24 separates from the stepped portion 20 and the hook 14 is rotated upward by the tension spring 21, as shown in FIG. It is dynamically biased and the engagement groove 1
7 opens diagonally forward and downward. Further, the stopper 24 is pressed against the back surface of the hook 14 by a tension spring 26.

When the tailgate 3 is raised from this state, the lock pin 12 first contacts the guide surface 19, rotates the hook 14 downward against the spring force of the tension spring 21, and then the tailgate 3
When pressed against the cargo box 1, the lock pin 12 is completely inserted into the engagement groove 17, and at the same time the stopper 24
is rotated by the tension spring 26 and the stepped portion 20
(see solid line in FIG. 2), the hook 14 is secured, and the tailgate 3 is fixed to the cargo box 1.

In addition, when releasing the above-mentioned lashing, lever 23
The stopper 24 is detached from the stepped portion 20 by rotating the lock pin 12, and the stopper 24 is pressed into the tailgate 3 by the hook 14, which automatically rotates in the releasing direction with respect to the lock pin 12. After the hook 14 continues to rotate while detaching from the lock pin 12,
It is located at the release end position (see Figure 4).

In this embodiment, the locking member 11 is provided on the tailgate 3 and the lock pin 12 is provided on the cargo box 1, but in the present invention, the locking member 11 is provided on the cargo box 1 and the lock pin 12 is provided on the tailgate 3. In addition, the tailgate lifter 2 can be replaced by a pair of arms 6 forming a parallel link mechanism, and the tailgate 3 can be moved by a hydraulic cylinder or the like against a column vertically erected at the rear end of the cargo box 1. A device that can be raised and lowered may also be used.

Further, as another embodiment of the present invention, a lock pin may be provided on the cargo box and a locking member may be provided on the side gate of the cargo box, or conversely, a locking member may be provided on the cargo box and a lock pin may be provided on the side gate. It is.

As described above, according to the present invention, since a locking member having a hook and a hook securing means is provided on either the cargo box of a freight vehicle or the side of the gate, and a locking pin is provided on the other side, the gate can be automatically secured to the cargo box during the closing operation, so there is no need to perform the securing operation again, simplifying the operation and ensuring that forgetting to secure the goods is prevented. , the gate can be safely supported. In addition, since the cargo box and the gate can be firmly tied together, the rigidity at the time of lashing can be increased.

Furthermore, when the gate is opened, the hook securing means is quickly released by disengaging the stopper from the hook stepped portion, and this released state is automatically maintained, so that the gate can be opened. Can be opened immediately.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a perspective view of a tailgate lifter, FIG. 2 is a side view of the gate locking device partially cut away, FIG. 3 is a rear view thereof, and FIG. 4 is a side view of the tailgate lifter. FIG. 3 is a partially omitted side view of the locking member showing the hook in a released state. 1... Packing box, 2... Tailgate lifter, 3...
... Tailgate, 6 ... Arm, 8 ... Hydraulic unit, 10 ... Gate lock device, 11 ... Locking member, 12 ... Lock pin, 14 ... Hook, 1
5... Hook lashing means, 16... Pin, 17...
Engagement groove, 18... Contact portion, 20... Step portion, 21,
26... tension spring, 22... shaft, 2
3...Lever, 24...Stoppa.

Claims (1)

[Claims] 1. A locking member with a hook pivotally attached to one side of a cargo box or a gate of a freight vehicle, and a lock pin to which the hook engages and disengages are provided on the other side, and the hook is in contact with the lock pin. A spring tensioned between the hook and the gate constantly biases the locking pin in the releasing direction, and the locking member has a locking member that rotates in the closing direction of the gate. Hook lashing that holds the hook in the lashing position when the hook and the lock pin come into abutting engagement with each other by a dynamic operation and the hook is positioned at the lashing position of the lock pin against the spring force of the spring. The hook securing means includes a lever pivotally connected to a locking member, and a stopper that engages and disengages from a stepped portion formed on the hook, and is integrally connected to the lever, and the stopper is connected to the lever. A gate lock position for a freight vehicle, characterized in that the gate lock position of a freight vehicle is always biased in the direction of engagement with a stepped portion by a spring stretched between a hook securing means and a locking member.