JPH0441398A - Car body supporter for lift - Google Patents

Abstract

PURPOSE:To support a vehicle in stabilization by stopping movement of fluid in a sealed bag through actuation of a pressure sensor when the fluid reaches a fixed pressure as well as fixing plural sealed bags in which the fluid is sealed on the upper surface of the receiving base of a lift used for maintenance of the vehicles, or the like, and providing connection between the sealed bags by a communicating pipe. CONSTITUTION:Such a fluid 3a as air or water is sealed in flat sealed bags 3...3, and the lower surfaces thereof are fixed to the flat plate 26 of a receiving base 2. Communicating pipes 4...4 are laid to provide connection among flat sealed bags 3...3, and opening/closing valves 5, 5 are interposed between the communicating pipes 4, 4. When a plunger 1a is made to ascend by a hydraulic mechanism so as to bring the flat sealed bags 3...3 in contact with the supported place of a vehicle A, the flat sealed bags 3...3 adhere closely to said supported place in response to projections and recesses of the bottom of the vehicle A. When a pressure of the sealed fluid reaches a fixed pressure, a pressure sensor 6 is actuated to close all the opening/closing valves 5 set in the communicating pipes 4...4 through a controller. Thus, movement of the fluid 3a among the flat sealed bags 3...3 is stopped, and each sealed bag 3 maintains the vehicle A in its horizontal state and lifts it up safely by keeping a fluid quantity in response to respective projections and recesses.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a vehicle body support device for a lift used for maintenance of vehicles and the like.

(2) Prior art As shown in Fig. 4, the conventional vehicle body support device for a lift consists of welding a flat plate (b) onto a metal angle (a), and attaching appropriate attachments (c) and (b) to the flat plate (b). There are known devices in which a vehicle is supported by attaching e), and devices in which a rubber bat is bonded to the top surface of the flat plate.

(3) Problems to be solved by the invention However, in the former case, it takes a lot of man-hours to attach the attachment to the flat plate (b), and furthermore, it is difficult to attach the attachment to a low-floor vehicle. Moreover, in the latter case, it is difficult to make minute contact with the unevenness of the bearing surface of the vehicle, resulting in problems such as tilting and movement of the vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a vehicle body support device for a lift that is simple in structure, easy to handle, and particularly suitable for lifting low-floor vehicles.

(4) Means for Solving the Problems In order to achieve the above object, the present invention provides a plurality of flat sealed bags filled with a predetermined amount of fluid on the upper surface of the cradle of a lift that uses a drive mechanism to lift up a vehicle, etc. and connect these sealed bags with a communication pipe, and connect any one of these sealed bags.
A pressure sensor that operates at a predetermined pressure is installed in each sealed bag.
The invention is characterized in that an on-off valve that is closed by the operation of the sensor is interposed in the communicating pipe.

(5) Operation By driving the vehicle onto the lift and raising the pedestal by the drive mechanism of the lift to bring the flat sealed bags into contact with the floor surface of the vehicle body, the fluid in each sealed bag moves and the floor surface The convex and concave portions pressurize the fluid inside the sealed bag while coming into close contact with each sealed bag according to the unevenness, and when the fluid reaches a predetermined pressure, the pressure sensor is activated, and this operation closes each on-off valve and closes each sealed bag. The bag maintains its shape according to the unevenness of the floor surface and lifts the car body horizontally.

(6) Example Hereinafter, one example of the present invention will be explained with reference to FIGS. 1 to 3.

(1) indicates a lift, which consists of an angle (2a) fixed to the tip of a plunger (la) and a flat plate (
2b) Left and right pedestals (2) (2) consisting of (2b)
It consists of a hydraulic mechanism and other drive mechanisms (not shown), and is erected in a recess (1b) in the floor.

(3)...(3) indicates flat sealed bags, these flat sealed bags (3)...(3) are made of a corded rubber material, etc., and there is a fluid (3a) such as air or water inside. is enclosed, and the lower surface is fixed to the flat plate (2b) of each of the pedestals (2). In addition, when the sealed fluid (3a) is a liquid such as water, the volume ratio of the liquid to the sealed bag (3)...(3) is 70.
~80% encapsulated.

(4) (4) indicates a communicating pipe, and these communicating pipes (
4) (4) is connected between the flat sealed bags (3)...(3), and on-off valves (5) (5) are interposed between these communication pipes (4) (4). There is.

(6) indicates a pressure sensor consisting of a pressure switch etc.
The pressure sensor (6) is provided in one of the sealing bags (3)...(3), and is activated when the fluid pressure in the sealing bag (3) reaches a set pressure. The output signal from this operation causes all the on-off valves (5) to be closed via the controller (7) as shown in FIG.

Next, the operation of the embodiment having the above configuration will be explained.

First, the vehicle (A) is moved and stopped on the lift (1), and then the plunger (LA) is moved by a hydraulic mechanism (not shown).
) is slightly raised and the flat sealed bags (3)...(3) are brought into contact with the supporting parts of the vehicle (A). At this time, the flat sealed bags (3)...(3) have a spare space when the sealed fluid is a liquid, and when the sealed fluid is a gas, the gas has compressibility, and each flat sealed bag has a spare space. Since the sealed bags (3)...(3) are connected by the communicating pipes (4) (4), the vehicle (A)
The flat sealed bag (3)...
・(3) is in close contact. When the pressure of the sealed fluid increases with this close contact and reaches a predetermined pressure, the pressure sensor (6)
is activated and the communication pipe (4) (4) is activated via the controller (7).
) and close all on-off valves (5) installed in the flat sealed bag (
3) Stop the movement of the gas or liquid (3a) between (3), and further operate the hydraulic mechanism while each sealed bag (3) maintains the amount of fluid according to its unevenness. The vehicle (A) is maintained in a horizontal state and lifted up safely.

In addition, when lowering the vehicle (A), operate in the opposite manner to the above, and the sealing bags (3)...(3) are released from the support points on the bottom of the vehicle, causing the fluid pressure to drop. When the pressure falls below a predetermined pressure, the pressure sensor (6) becomes inactive, and all on-off valves (3) are opened to allow fluid movement between the sealed bags (3), returning to the original state.

(7) Effects of the Invention As described above, according to the present invention, a plurality of flat sealed bags filled with a specific amount of fluid are fixed to the upper surface of the pedestal of the lift, and the sealed bags are connected by a communication pipe, and A pressure sensor (
6) Since the opening/closing valve is provided, when the sealing bag comes into close contact with the unevenness on the bottom of the vehicle, the movement of the fluid inside the sealing bag is stopped and the vehicle can be stably supported. This has the effect of being able to easily lift up a low-floor vehicle with a low-floor vehicle and providing an inexpensive lift.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an embodiment of the present invention Fig. 2 is a block diagram of the control system, Fig. 3 is a front view of the vehicle in an elevated state, and Fig. 4 is a part of a conventional lift. FIG. ...Lift...Pedestal...Flat sealed bag...Communication pipe...Opening/closing valve...Pressure sensor

Claims (1)

[Scope of Claims] A plurality of flat sealed bags filled with a predetermined amount of fluid are fixed to the upper surface of a pedestal of a lift that lifts up a vehicle etc. by a drive mechanism, and these sealed bags are connected by a communication pipe. A vehicle body support device for a lift, characterized in that one of the sealing bags is provided with a pressure sensor that operates at a predetermined pressure, and an on-off valve that is closed by the operation of the sensor is interposed in each of the communication pipes.