JP2968220B2 - Screw jack for body fixing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw jack for fixing a vehicle body used for immovably fixing a vehicle body.

[0002]

2. Description of the Related Art Conventionally, when restoring or repairing damage such as a depression in a vehicle body of an automobile due to an accident, the vehicle body is fixed immovably on a floor or the like. For fixing a vehicle body in such a repair work, for example, a screw jack described in Japanese Utility Model Publication No. 63-17735, which is related to the invention of the applicant, is known. In the screw jack according to the present invention, a cylinder is vertically established on a flat seat plate, a screw shaft is screwed into the cylinder so as to be able to move up and down, and an annular receiving piece is fixed to an upper protruding portion of the screw shaft. It is configured.

[0003] Two screw jacks constructed as described above are arranged along both sides of the vehicle body, and each end of a pipe provided in the vehicle width direction is inserted into the annular receiving piece.
The height of the vehicle body support bracket for holding the edge of the vehicle body mounted on the pipe is adjusted by raising and lowering the screw shaft. Further, each screw jack is securely fixed by being engaged with a stopper fixed to the ground via a chain. In this state, the concave work of the vehicle body is clamped by a clamp extending from the vehicle body correcting machine, and the clamp is pulled to perform the repair work.

[0004]

As described above, the screw jack is configured such that the screw shaft is screwed into the cylinder and moves up and down in the cylinder, and the pipe is inserted through the annular receiving piece at the upper end of the screw shaft. Since it is necessary to use a screw shaft having a large diameter to provide strength, it was not produced in a commercially available product and was manufactured by special order. But,
Exclusively the lateral force pulled by the body corrector is directly applied to the screw shaft, and when a large force is applied, the screw shaft may bend and become unusable. In addition, there is a problem that the cost is increased because the screw shaft is manufactured by a special order.
Therefore, the present invention improves durability by inserting the inner cylinder slidably into the outer cylinder and supporting the pipe with the inner cylinder to prevent bending, and furthermore, to apply a lateral force directly to the screw shaft. An object of the present invention is to provide a screw jack for fixing a vehicle body, which can be provided at a low cost by using a general commercially available screw shaft instead of a special order product without adding a screw shaft.

[0005]

In order to achieve the above object, a screw jack for fixing a vehicle body according to the present invention has an outer cylinder vertically established on a flat upper surface of a seat plate, and an inner cylinder is provided in the outer cylinder. A screw shaft is erected on the upper surface of the seat plate, and a female screw member screwed to the screw shaft is fixed to the lower end of the inner cylinder, or a screw is fixed to the lower end of the inner cylinder. A female screw member to be screwed to the screw shaft is fixed to the lower side of the outer cylinder while the shaft is vertically provided, and the screw shaft and the female screw member are screwed together so that the inner cylinder can be freely raised and lowered, A jig for fixing the vehicle body can be mounted on the upper part of the inner cylinder.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a screw jack A for fixing a vehicle body (hereinafter simply referred to as a screw jack) according to the present invention will be described below with reference to the drawings. Figure 1 shows screw jack A
FIG. 2 is a longitudinal sectional view of FIG. In the figure, reference numeral 1 denotes a seat plate made of a flat plate, and an outer cylinder 2 is vertically established on the upper surface of the seat plate 1 by welding. A commercially available screw shaft 3 is set upright at the center in the outer cylinder 2, and its lower end is fixed to the upper surface of the seat plate 1 by welding. An inner cylinder 4 having a lower end opened is slidably fitted into the outer cylinder 2, and
A female screw member 5 to be screwed to the screw shaft 3 is fixedly provided at the lower end opening of the screw shaft 3. A shaft portion 6 is provided upright at the upper end of the inner cylinder 4.

[0007] 7 is an upper horizontal plate 7 above and below the vertical plate 7a.
b and a lower horizontal plate 7c are bent so as to protrude in opposite directions to each other as a vehicle body fixing jig, and the upper horizontal plate 7b of the receiver 7 is attached to the shaft 6. At the same time, the vertical plate portion 7a is suspended along one side of the outer cylinder 2 and the annular receiving piece 8 is fixed on the lower horizontal plate portion 7c by welding. Further, an L-shaped receiving piece 9 is fixed to the vertical plate portion 7a by welding on the receiving piece 7 on the annular receiving piece 8, and another annular receiving piece 10 is fixed to the L-shaped receiving piece 9 by welding. . Tightening bolts 11 and 12 for tightening a pipe to be inserted are respectively penetrated through the annular receiving pieces 8 and 10 so as to be loosely fastened.

Reference numeral 13 denotes a sliding cylinder loosely fitted on the outer periphery of the outer cylinder 2,
The vertical plate portion 7a of the receiving member 7 is fixed to the sliding cylinder 13 by welding. A cap 14 is loosely covered on the upper end of the shaft portion 6, and an annular receiving piece 15 as a vehicle body fixing jig is fixed on the cap 14 by welding. A small screw 16 protruding inward from one side wall of the cap-shaped body 14 is loosely fitted into a small-diameter portion 17 formed on the shaft 6 so as to prevent the cap-shaped body 14 from coming off. Reference numeral 18 denotes an operating rod which is loosely fitted in a through hole 19 penetrating in the diameter direction of the shaft portion 6 and rotates the inner cylinder 4. The jig for fixing the vehicle body includes an annular receiving piece 15.
In addition, a jig such as a clamp for fixing each part of the vehicle body is attached.

Next, the use of the screw jack A will be described with reference to FIG. Two screw jacks A are arranged along both side edges of the vehicle body B, and both ends of the pipe 20 provided in the vehicle width direction are respectively inserted into the annular receiving pieces 15 on the upper part of the inner cylinder 4. Reference numeral 21 denotes a vehicle support fitting mounted on the pipe 20, and a plate 23 in a direction orthogonal to the annular body 22 is vertically fixed to an upper surface of an annular body 22 fitted and inserted into the pipe 20 by welding.
A pair of sandwiching pieces 24, 24 are provided on the plate-like body 23 so as to be able to be tightened by tightening bolts 25, 25, and a bracket 26 is fixed to a middle portion by a fixing bolt 27, and a through hole is formed in the bracket 26. 28 and 29 are open. Reference numeral 30 denotes a stop bolt screwed in to tighten the pipe 20 inserted through the annular body 22. Both ends of a vertical rod 31 arranged along both side edges of the vehicle body B are inserted into the through holes 29, and a flat rectangular frame is formed by surrounding the vehicle body B with two pipes 20 and the vertical rod 31. They are ready to be assembled. A chain 32 is inserted into the through hole 28, and both ends of the chain 32 can be engaged with a stopper 34 fixed to the ground with anchor bolts 33.

Then, the operating rod 18 is turned to rotate the inner cylinder 4.
Is raised through the pipe 20, and the holding pieces 24, 24 of the respective vehicle support fittings 21 are brought into contact with predetermined portions on the lower surfaces on both side edges of the vehicle body B, so that the vehicle Hold the lower edge E. Thereby, the vehicle body B can be fixed.
Then, by extending the chain 32, each screw jack A is prevented from skidding. In this state, a clamp drawn out from a vehicle body corrector (not shown) is clamped in the concave portion of the vehicle body B and repaired. At this time, although a lateral force is applied to the upper end of the inner cylinder 4 via the pipe 20, the inner cylinder 4 is configured to be slidably inserted into the outer cylinder 2, so that the screw shaft 3 is bent. There is nothing to do.

FIG. 4 shows a screw jack A1 according to another embodiment. This is a donut disk shape in which the upper end of the screw shaft 3 is fixed to the center of the lower end of the inner cylinder 4 by welding, and the female screw member 5 screwed to the screw shaft 3 is fixed horizontally in the outer cylinder 2. It is fixed to the upper surface of the support plate 35 by welding. Other configurations are the same as those shown in FIG. Also in this embodiment, the inner cylinder 4 is slidably fitted in the outer cylinder 2 and is supported in the same manner as the configuration shown in FIG. 2 to prevent the screw shaft 3 from being bent.

FIG. 5 shows a screw jack A2 according to still another embodiment. This is the outer cylinder 2 with the support cylinder 36
And a lower end thereof is fixed to the upper surface of the seat plate 1, and a plurality of communication holes 38 through which the pins 37 are passed are provided at different heights. On the other hand, the lower end of the outer cylinder 2 is not fixed to the upper surface of the seat plate 1, but a communication hole 39 is formed near the lower end of the outer cylinder 2 to communicate with the communication hole 38. Further, a communication hole 3 is provided in the outer cylinder 2.
2, and the lower end of the screw shaft 3 is fixed at the center of the upper surface of the bottom plate 40 as shown in FIG. Other configurations are the same as those shown in FIG. The screw jack A2 configured as described above lifts the outer cylinder 2 with the pin 37 removed, and selects a communication hole 38 provided at the lower end of the screw jack A2 at an appropriate position from the communication holes 38 provided in the support cylinder 36. And the pin 37 is made to penetrate, so that the lifting and lowering operation of the screw shaft 3 can be performed earlier than the turning operation of the operating rod 18.

[0013]

As described above, the screw jack for fixing the vehicle body according to the present invention has the inner cylinder slidably fitted in the outer cylinder erected on the upper surface of the seat plate. A screw shaft is erected on the upper surface of the inner cylinder and a female screw member is fixed to the lower end of the inner cylinder, or a screw shaft is vertically provided at the lower end of the inner cylinder and a female screw member is fixed to the lower side of the outer cylinder, Since the screw shaft and the female screw member are screwed together so that the inner cylinder can be freely raised and lowered, the external force applied at the time of repairing the vehicle body can be received by the inner cylinder, and the screw shaft can be prevented from bending, Thereby, the durability of the screw shaft can be increased. Further, since the screw shaft can be a general commercial product instead of a special order product, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a screw jack for fixing a vehicle body according to the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a perspective view of a use state.

FIG. 4 is a longitudinal sectional view of a screw jack for fixing a vehicle body according to another embodiment.

FIG. 5 is a longitudinal sectional view of a screw jack for fixing a vehicle body according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat plate 2 Outer cylinder 3 Screw shaft 4 Inner cylinder 5 Female screw member 6 Shaft 15 Jig for fixing vehicle body (annular receiving piece)

Claims (1)

(57) [Claims] 1. An outer cylinder is vertically established on an upper surface of a flat seat plate, and an inner cylinder is slidably fitted in the outer cylinder. A screw shaft is erected on the upper surface of the seat plate. A female screw member screwed to the screw shaft at the lower end of the inner cylinder, or a screw shaft is vertically attached to the lower end of the inner cylinder and screwed to the screw shaft below the outer cylinder. Is fixed, a screw shaft and a female screw member are screwed together so that the inner cylinder can be freely moved up and down, and a jig for fixing a vehicle body can be mounted on the upper part of the inner cylinder. Screw jack for fixing the vehicle body.