JPS6310355Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gate plate horizontal holding device for a cargo handling lifting device for a vehicle.

[Conventional technology]

A gate plate that rises and lowers at the rear of a freight vehicle is installed to make it easier to load cargo from the ground. However, if the wire or chain that transmits power breaks, the top of the gate plate will tilt and the gate plate will tilt. There was a problem with the baggage on it falling over, which was very dangerous.

Further, if there is a convex object such as a pebble at a position off center while the gate plate is descending, the gate plate will be tilted, and there is a problem that there is a risk that the load on it may fall.

Therefore, it is necessary to drive the left and right gate plates in synchronization, and the inventor of the present invention previously proposed
In No. 42345, a chain or a rack is attached to the left and right lifting members to which the gate plate is attached, a sprocket or pinion is provided to mesh with the chain or rack, and the left and right sprockets or pinions are connected by a shaft. Therefore, we have proposed a gate plate horizontal holding device for a vehicle cargo handling device that synchronizes the left and right lifting members.

[Problem that the invention attempts to solve]

However, in the gate plate horizontal holding device of the vehicle cargo handling equipment mentioned above, the sprocket meshes with the linear chain from one direction, so the sprocket and chain may come off due to vibrations during driving, or the meshing portion may become loose. There is a problem in that the gate plate is slanted due to flying off, and this problem also exists in gate plate horizontal holding devices for vehicle cargo handling equipment using racks and pinions.

Of course, if you make the guide for the lifting member with precision and mesh the chain and sprocket with precision,
At the beginning of production, the meshing part will not come off or fly off, but the processing cost will increase,
Moreover, when used for a considerable period of time, there is a problem in that the vibrations generated while the freight car is running can cause play, which could cause the meshing parts to come off and lead to an accident.

The present invention was developed in view of these circumstances, and allows the entire device to be manufactured at low cost.
To provide a gate plate horizontal holding device for a cargo handling lifting device for a vehicle in which a meshing part does not come off even due to vibrations, left and right lifting members are reliably synchronized, and a gate plate does not tilt.

[Means to solve problems]

The gate plate horizontal holding device of the vehicle cargo handling lifting device according to the present invention in accordance with the above purpose has left and right guide columns erected on both sides of the rear of the vehicle, and moves up and down within the left and right guide columns to move the lower end to the gate. In a vehicle cargo handling elevating device comprising an elevating member connected by a plate and a hydraulic cylinder disposed in the left and right guide columns for elevating and lowering the elevating member, a chain mounting bracket is attached to each of the elevating members. At the same time, each chain having both ends attached to the chain mounting bracket is engaged in a U-shape with an upper sprocket and a lower sprocket respectively provided in the guide column, and furthermore, each chain is provided in the left and right guide columns respectively. The lower sprocket is fixedly attached to a connecting shaft rotatably attached below the loading surface of the vehicle.

[Effect]

In the gate plate horizontal holding device of the vehicle cargo handling lifting device according to the present invention, the lifting members fixed to both sides of the gate plate on which cargo is placed move up and down within the guide column, and each lifting member is equipped with a chain. A metal fitting is provided, and both ends of the chain are attached to the upper sprocket and the lower sprocket in a U-shape, and the left and right lower sprockets are fixedly attached to a connecting shaft that is rotatably attached below the loading surface of the vehicle. ing.

Therefore, the left and right lower sprockets attached to the connecting shaft rotate synchronously.

And the chain is U on the lower sprocket above.
The upper sprocket also rotates synchronously, and as a result, the elevating member is pulled by the synchronously interlocking chain and performs a synchronous linear movement. The gate plate then moves up and down while maintaining its horizontal position.

〔Example〕

Next, an embodiment embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a schematic side view of a gate plate horizontal holding device of a vehicle cargo handling lifting device according to an embodiment of the present invention, FIG. 2 is a detailed sectional view of a section A in FIG. 1, and FIG. is a front view of the gate plate horizontal holding device of the vehicle cargo handling lifting device according to the above embodiment, FIG. 4 is a cross-sectional view taken along arrow A-A in FIG. 3, and FIG. 5 is a vehicle cargo handling lifting device according to the above embodiment. FIG. 2 is a perspective view of a vehicle to which the gate plate horizontal holding device of the device is attached.

As shown in FIGS. 1, 3, and 5, a gate plate horizontal holding device 10 of a cargo handling lifting device for a vehicle according to an embodiment of the present invention has left and right guides erected on both sides of the rear of a vehicle 11. Pillars 12, 13 and elevating members 14, 1 that move up and down inside the left and right guide columns 12, 13
5, hydraulic cylinders 16, 16 disposed in the left and right guide columns 12, 13 to raise and lower the lifting members 14, 15, and the lifting members 14, 15.
chain mounting brackets 17 and 18 attached to the
It has chains 19, 20 connected to the chain mounting fittings 17, 18, and upper sprockets 21, 22 and lower sprockets 23, 24 that mesh with the chains 19, 20, respectively.
These will be explained in detail below.

The elevating members 14 and 15 have T-shaped cross sections as shown in FIG. 4, and have opening grooves 25 and 26 at the rear.
The head fits into the guide columns 12 and 13 in which the guide columns 12 and 13 are formed, and guide rollers 27 and 28 are provided that contact the inside and outside of the guide columns 12 and 13, so that the head can be smoothly raised and lowered along the guide columns 12 and 13. I'm starting to do that.

A gate plate 29 is attached to the lower end of the elevating members 14, 15 so as to be openable and closable.
The gate plate 29 is raised and lowered as the gate plate 5 is raised and lowered. Note that foldable supports 30 and 31 are attached to the intermediate portions of both sides of the gate plate 29 and the intermediate portions of the elevating members 14 and 15 to prevent the gate plate 29 from bending.

Chain fittings 17 and 18 are attached to the upper ends of the elevating members 14 and 15, and guide columns 1
The upper sprockets 21, 22 and the guide columns 12, 1 are rotatably attached to the upper parts of the sprockets 2, 13.
Lower sprocket 2 installed inside 3
Chain 19 meshes with 3 and 24 in a U-shape,
Both ends of 20 are attached. FIG. 2 shows a state in which the chain 19 is attached to the chain attachment fitting 17.

As shown in FIG. 4, the lower sprockets 23 and 24 are attached to both ends of a connecting shaft 34 which is rotatably attached by bearings 32 and 33. It is installed lower than 35 so that it does not interfere with cargo handling.

On the other hand, hydraulic cylinders 16 and 16 are provided inside the guide columns 12 and 13, respectively.
Sprockets 37, 37 are provided at the tips of the hydraulic cylinders 16, 16, respectively, and one end of the sprockets 37, 37 is connected to the lifting member 1.
4, 15, and the other end is attached to the guide column 1.
Chain 3 attached to the lower end of 2, 13
8 and 38 are in mesh with each other, and as the hydraulic cylinders 16 and 16 expand and contract, the elevating members 14 and 15 move up and down.

Therefore, when the hydraulic cylinders 16, 16 are driven to raise and lower the elevating members 14, 15, the chain fittings 17, 18 attached to the elevating members 14, 15 are raised and lowered, but along with this, the chain 19 , 20 move up and down, and the upper sprocket 2
1, 22 and lower sprockets 23, 24 are rotationally driven.

However, since the lower sprockets 23 and 24 are connected via the connecting shaft 34, the chains 19 and 20 move synchronously, and as a result, the elevating members 14 and 15 also move synchronously.

Therefore, the gate plate 2 is attached to the elevating members 14 and 15.
By fixing the gate plate 9 horizontally, even if there is an obstacle under the gate plate 29 or the drive chain 38 is broken, the horizontal state can be maintained.Moreover, the chain 19, Since the sprockets 20 are engaged with the lower sprockets 23 and 24 in a U-shape, they will not come off due to vibrations while the vehicle is running.

[Effect of idea]

As is clear from the above description, the gate plate horizontal holding device of the vehicle cargo handling lifting device according to the present invention has the following features:
A chain mounting bracket is attached to the elevating member that moves the gate plate up and down, and the chain attached to the chain mounting bracket meshes with the lower sprocket fixed to both sides of the connecting shaft.
It is possible to go up and down while keeping the gate plate horizontal.

Since the engagement between the chain and the lower sprocket is U-shaped, the chain will not come off or fly off due to vibrations caused by the running of the vehicle or play caused by use. Since there are no gate plates, the gate plate is always kept horizontal, so there are no accidents such as luggage falling onto the gate plate.

In addition, in the gate plate horizontal holding device of the vehicle cargo handling lifting device of the present invention, the drive means for raising and lowering the lifting member and the gate plate horizontal holding device are separate, so even if the chain of the gate plate horizontal holding device breaks, Even so, the gate plate can be maintained in a substantially horizontal state by the hydraulic cylinder that drives the elevating member, resulting in a double safety structure.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a gate plate horizontal holding device of a vehicle cargo handling lifting device according to an embodiment of the present invention, Fig. 2 is a detailed sectional view of section A in Fig. 1, and Fig. 3
The figure is a front view of the gate plate horizontal holding device of the vehicle cargo handling lifting device according to the above embodiment, FIG. 4 is a sectional view taken along arrow A-A in FIG. 3, and FIG. FIG. 2 is a perspective view of a vehicle to which a gate plate horizontal holding device of an elevating device is attached. Explanation of symbols, 10...Gate plate horizontal holding device of vehicle cargo handling lifting device, 11...Vehicle, 12, 13
... Guide column, 14, 15 ... Lifting member, 16 ...
...Hydraulic cylinder, 17,18...Chain mounting bracket, 19,20...Chain, 21,22...
Upper sprocket, 23, 24... Lower sprocket, 25, 26... Opening groove, 27, 28... Guide roller, 29... Gate plate, 30, 31...
Folding supporter, 32, 33...Bearing, 34...
...Connection shaft, 35...Floor surface, 37...Sprocket, 38...Chain.

Claims (1)

[Scope of utility model registration request] Left and right guide columns erected on both sides of the rear of the vehicle; lifting members that move up and down within the left and right guide columns and whose lower ends are connected by a gate plate; In the cargo handling lifting device for a vehicle, which has a hydraulic cylinder for raising and lowering the lifting member, each of the lifting members is provided with a chain attachment fitting, and each chain, whose both ends are attached to the chain attachment fitting, is installed in the guide column. The upper sprocket and the lower sprocket provided in the left and right guide columns are engaged with each other in a U-shape, and the lower sprockets provided in the left and right guide columns are connected to a connecting shaft that is rotatably mounted below the loading surface of the vehicle. A gate plate horizontal holding device for a vehicle cargo handling lifting device, characterized in that it is fixedly attached.