JPS5851659Y2 - Pantograph type lift car using jacks - Google Patents

Description

[Detailed description of the invention] This invention is a simple structure in which a lift platform is installed on the transport vehicle, and a pantograph-type arm installed between the lift platform and the vehicle body base is forcibly rotated by a jack to raise and lower the lift platform. The present invention relates to a pantograph type lift transport vehicle (hereinafter abbreviated as lift car).

Since it would be extremely convenient to provide a lift mechanism to a transport vehicle, many proposals have been made, and various products are available on the market.

In terms of structure, in the case of a pantograph type, the lift platform is raised and lowered by horizontal screws across the bends of the upper and lower arms, or the lift arm is made into an X shape and the lower part of the arm is pushed up diagonally with a cylinder, etc. is the mainstream.

If you were to use a pantograph type model with a cylinder that pushes up vertically, the stroke of the cylinder would have to be extremely long, making it nearly impossible to install.

Therefore, we considered a simple structure that would increase the lifting height using a jack with an extremely short stroke, and created a pantograph-type arm with a dogleg-shaped and an inverted dog-legged arm facing each other, and the lower arm. A lift rod is installed horizontally between the lower arms on both the left and right sides near the rotation axis of the lower arm between them, and a lifting arm is placed across the center of the rod, and a jack is used to push up approximately the center of the lifting arm. I solved the above problem.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a side view of the lift car of the present invention, and FIG. 2 is a rear view thereof.

As shown in the drawing, four wheels 2 are provided at the bottom of the base 1 of the vehicle body, a handle 3 is provided behind the base 1, and a lift platform 4 is provided parallel to the base 1 at the top of the vehicle body. is placed horizontally.

In order to move the lift platform 4 up and down to raise and lower the cargo, the following structure was adopted.

Arms 6 to 9 which can be bent into a dogleg shape, which is one of the features of the present invention, are arranged between the base 1 and the lift table 4 above it.

The arrangement method is that the front lower arm 7 is rotatably fixed on the left and right sides of the front of the vehicle body by a lower arm rotation shaft 18 provided on the base 1, and the upper arm rotation provided on the lift stand 4. The front upper arm 6, which is rotatably provided by a shaft 19, is connected by a connecting rotation shaft 5 so that it can be bent into a dogleg shape.Furthermore, a lift stand 4 and a base 1 are provided on both left and right sides of the rear part of the vehicle body as described above. A pantograph-type structure is provided by disposing a bendable arm in an inverted dogleg shape in which a rear upper arm 8 and a rear lower arm 9 are connected by a connecting rotation shaft 10.

A lift rod 11 is provided between the two front lower arms 7, 7 on both the left and right sides of the front of the vehicle body, and a lift rod 12 is similarly provided between the two rear lower arms 9, 9 at the rear of the vehicle body. .

A jack frame 13 is fixed to the bottom of the base 1.
A hydraulic jack 14 is placed on the pedestal.

A lifting arm 16 is suspended from a movable cradle 15 above the jack 14 to the aforementioned lift rod 1L12.

When the jack lever 17 provided on the jack 14 at the bottom of the base 1 is moved up and down, the jack's pedestal 15 is raised by hydraulic pressure and the lifting arm 16 is pulled up, and the front and rear arms 7.
9 is pulled inward to raise the lift platform 4.

Here, the lifting arm is suspended between the front and rear lower arms 7.9 with the vicinity of the lower arm rotation axis 18 as a fulcrum, and the lifting arm is connected in a bendable manner at the center, and the connecting part is used as a cradle for the jack. By pushing up at 15, we were able to create a structure that allows the lift platform to be raised high with an extremely short jack stroke.

In addition, the lifting arm can be replaced with a wire rope and the lifting rod lL
It is simple to construct a structure in which the rack is stretched between 12 spaces and the center thereof is fixed to the jack holder 15.

When lowering the lift platform 4, the oil pressure is lowered by the switching valve of the jack 14 in the usual manner, and the pedestal 15 is lowered.
The lift platform 4 also descends.

As detailed above, the present invention has a lift structure using a pantograph-type arm, and the lift platform is raised and lowered by utilizing the fact that the pantograph-type arm opens and closes widely by raising and lowering the pedestal of the jack. There is.

In this way, the structure is simple, so it can be provided at low cost, and the lift platform can be easily raised by operating the jack lever under the handle, so even women and girls can easily handle heavy objects.

[Brief explanation of drawings]

FIG. 1 is a side view, and FIG. 2 is a rear view. DESCRIPTION OF SYMBOLS 1...Base, 4...Lift stand, 5...Connection rotation axis, 6...Front upper arm, 7...Front lower arm, 8
...Rear upper arm, 9...Rear lower arm, 10...
・Connection rotation shaft, 14... Jacket, 15... Jacket cradle, 16... Lifting arm.

Claims (1)

[Scope of utility model registration request] A lift stand 4 is arranged on the base 1 of the transport vehicle, and the lift stand 4 is placed on the base 1 of the transport vehicle.
An arm that bends in a dogleg shape by a connecting rotation shaft is provided between the base 1 and the front and rear sides of the vehicle so that the upper end can be rotated with the lift platform 4 and the lower end can be rotated with the base 1, and the jack provided on the base 1 is A lifting arm 16 is connected between the pedestal 15 and the arm.
A pantograph type lift car using a jack, characterized in that the lift platform 4 is raised and lowered by raising and lowering a jack cradle 15.