JPS5851856B2 - Dog board for loading and unloading luggage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo loading and unloading dog board for transferring cargo to be loaded and unloaded between a cargo vehicle and a cargo handling dog.

Generally, when loading and unloading cargo between a cargo vehicle such as a truck and a cargo handling dog, a dog board is hung between the receiving platform of the cargo vehicle and the dog, and the cargo is transferred between them. However, transporting the dog board and installing it in a predetermined position required multiple workers, which was a laborious and troublesome task.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dog board for loading and unloading cargo with a simple structure, which allows the dog board to be transported and installed at a predetermined position extremely easily and reliably. .

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. As shown in Fig. 1, the dog board B of the present invention can be raised and lowered from the cargo receiving platform C of a freight vehicle and the cargo handling dog D via a lift mechanism. The cargo W can be loaded and unloaded between the loading table C and the lifting table T by being interposed between the lifting tables T provided.
To explain the structure of this dog board B with reference to the diagram,
A pair of columns 4, 4 are erected on both sides of a frame 1, which has a running wheel 2 on one side and a flexible wheel 3 on the other side, and a fixed outer cylinder 5 is mounted approximately vertically on the top of each column 4. The fixed outer cylinder 5 has vertical guide holes 6 in both side walls.

A movable inner cylinder 7 is fitted into the fixed outer cylinder 5 so as to be slidable up and down, and a bracket 8 having a flange piece 9 is fixed to the upper end of the movable inner cylinder 7, and the flange piece 9 is connected to the fixed outer cylinder. 5
The lower limit position of the movable inner cylinder 7 is regulated by contacting the upper surface.

On the bracket 8, a mounting tongue 11, which is vertically provided below the board 10, is pivotally supported by a support shaft 12 so as to be freely rotatable up and down.

The board 10 is constructed by hingedly connecting the inner end of the auxiliary board 10□ to the inner end of the main board 10□ with a hinge 13,
The main and auxiliary boards 101 , 102 are capable of bending at approximately right angles, with the auxiliary board 102 being larger than the main board 101 .

The mounting tongue piece 11 is vertically installed at the inner end of the back surface on the main board 101 side.

A gas spring 21 is connected between the back surfaces of the main board 101 and the auxiliary board 102, and when the main and auxiliary boards 100.10□ are in one plane, the gas spring 21 is fully extended and holds them in that position. do.

A torque shaft 14 passing through the guide hole 6 is rotatably suspended at the lower end of the movable inner cylinder T, and base ends of first and second bell cranks 15 and 16 are attached to both ends of the torque shaft 14. are fixed to each other, and these bell cranks 15, 16 can rotate together.

A first gas spring 17 is connected between the first bell crank 15 and the mounting tongue 11 of the main board 101, and a bracket 8 on the second bell crank 16 and the movable inner cylinder T is connected.
A second gas spring 18 is connected between them.

The gas spring 21 and the first and second gas springs 17, 18 are each constructed by sealing gas between inner and outer members that are slidably fitted into each other.

First and second bell cranks 15 are provided at the lower end of the fixed outer cylinder 5.
．． A stopper 19 is provided to restrict the downward swinging of the support 16, and a stopper 20 is fixed to one side of the support 4 to lock the main board 101, which is rotated downward, in a substantially vertical position. .

Next, referring to FIG. 4, a case will be described in which the dog board B of the present invention is used to load and unload cargo W between the loading platform C of the cargo vehicle V and the dog 0. First, the board 10 is held substantially horizontally. Slightly compress the gas spring 21 and rotate the main board 101 downward around the hinge 13 to release the stopper 2.
0 and fold it at a substantially right angle.

In this case, the torque shaft 14 is brought into contact with the stopper 19 and is prevented from rotating downward, and the first gas spring 17 is contracted and an extension force is stored (FIG. 4A).

Next, the dog board B is run toward the dog D with the folded main board 10□ in front, the end surface of the mount 1 is brought into contact with the side surface of the dog D, and the brakes are applied to the flexible wheels 3.

Next, the freight vehicle V is moved backward toward the dog board B, and the rear part of the vehicle body is inserted under the auxiliary board 10□ of the board board 10 (Fig. 4, exit).

Next, move the auxiliary board 102 upward about 90 degrees around the hinge 13.
It rotates and stands up so that it is flush with the main board 101 (dashed line in Figure 4).

In this case, the gas spring 21 is extended and the auxiliary board 1
If you assist the upward rotation of 02, the main board 101
Hold the auxiliary board 10□ on the same plane.

Next, in order to hold the board 10 approximately horizontally, the main board 10 is
When □ is rotated upward, the first gas spring 17, which is in the contracted state, expands and assists the upward rotation of the board 10.

On the other hand, the second gas spring 1B remains in the extended state.

As the board 10 continues to rotate upward and its center of gravity G moves beyond the vertical line passing through the support shaft 12 to the overhanging side (Fig. 4C), the board 10 automatically rotates upward due to its own weight. The auxiliary board 10□ is rotated and extended to a substantially horizontal extended position, and the tip of the auxiliary board 10□ is supported on the cargo receiving platform C (FIG. 4-2).

Therefore, as mentioned above, the center of gravity G of the board 10 is located at the support axis 12.
above the vertical line passing through the first gas spring 1
7 is fully extended and pulled further upward, causing the first bell crank 15 to rotate upward, and the second bell crank 16 also rotates upward via the torque shaft 14, causing the second gas spring to be in an extended state. 18 begins to be compressed, the board 10 is cushionedly rotated to the extended position by the cushioning action of the second gas spring 18.

Once the board 10 has been rotated to the extended position, the lift mechanism is activated to raise the elevating table T on the dog D, and the edge of the elevating table T is brought into contact with the main board 101 of the board 10. Let them come into contact with you.

In this case, the board 10 is raised to the movable inner cylinder T,
The lifting table T is raised until the board 10 becomes approximately horizontal (FIG. 4E).

As described above, the board 10 of the dog board B can be hung between the cargo receiving platform C of the freight vehicle V and the lifting table 7 on the dog D, and the work of loading and unloading the cargo W can be performed between them.

As described above, according to the present invention, a board plate can be extended from the upper end of a movable inner cylinder that is movable up and down on a fixed outer cylinder that is fixed to a support on a movable frame, and can be rotated so that it can be stored. If a supporting device is provided between the board and the movable inner cylinder to assist the rotation of the board in the extending direction until the center of gravity of the board exceeds the center of rotation, the assisting device A shock absorber is installed that allows the dog board to be extended to the extended position in conjunction with the operation of the dog board, making it easy for one worker to transport the dog board and extend the board. The work efficiency can be significantly improved, and since the board can be extended while being provided with a cushioning effect, the board can be extended quietly and safely.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the case where cargo is loaded and unloaded between a freight vehicle and a dog using the dog board for loading and unloading cargo of the present invention, Fig. 2 is a front view of the dog board of the present invention, and Fig. 3 is the same. The side view and FIG. 3a are partial views of FIG. 1 with a part thereof cut away, and FIGS. 4A to 4H are operational views of the dog board of the present invention. G... Center of gravity, 1... Frame, 4 knees...
Pillar, 5... Fixed outer cylinder, 7... Movable inner cylinder, 10... Board plate, 101... Main board, 10□...・・Auxiliary board, 13・・・・
...Hinge, 15...1st bell crank, 16.
...Second bell crank, 1T...First gas spring as an auxiliary device, 18...Second gas spring as a shock absorber, 21...Gas spring.

Claims (1)

[Claims] 1. A support is erected on a movable frame, a fixed outer cylinder is fixed to the support, a movable inner cylinder is provided on the fixed outer cylinder so as to be movable up and down, and a movable inner cylinder is attached to the upper end of the movable inner cylinder. The board is rotatably provided so that it can be extended and stored, and between the board and the movable inner cylinder, the board is rotated in the extending direction until the center of gravity of the board exceeds the center of rotation. A dog board for loading and unloading cargo, which is provided with a buffering device which provides a buffering effect to the protrusion of the board in conjunction with the operation of the assisting device. 2. In the luggage loading and unloading dog board according to claim 1, the assisting device includes a first bell crank rotatably supported on a movable inner cylinder, and a tip of the first bell crank. A dog board for loading and unloading cargo, comprising a first gas spring connecting the boards, the first gas spring being held in a compressed state when the boards are stored. 3. In the luggage loading/unloading dog board according to claim 1, the shock absorber includes a second bell crank which is pivotally supported on the movable inner cylinder so as to be rotatable together with the first bell crank.
It consists of a bell crank and a second gas spring that connects the tip of the second bell crank and the movable inner cylinder, and the second gas spring is arranged so that the center of gravity of the board exceeds its rotation center in the extending direction. A dog board for loading and unloading cargo that is compressed when rotated. 4. In the luggage loading/unloading dog board according to claim 1, the board plate includes a main board rotatably supported on the upper end of the movable inner cylinder, and a hinge attached to the main board. The back surfaces of the main board and the auxiliary board are connected by a gas spring, and the gas spring is extended when the main board and the auxiliary board are on one plane, and A dog board for loading and unloading cargo that maintains this state.