JPH1143026A - Car body fixing screw jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly and easily pull out a car body, and restore it to its initial position by preventing the car body from being twisted at its fixed position when the car body, its recessed part in the side surface of the car body in particular, is pulled out to the direction perpendicularly intersected with the side surface in a state that the lower end periphery of the car body is fixed thereto by a screw jack. SOLUTION: In a screw jack A which is formed out of a main body part T erected over the upper surface of a floor and the like so as to be fixed thereto, and of an elevator part R which has a car body fixing jig 6 mounted to its upper end, and concurrently, is freely moved up and down while being turned around within the horizontal surface vertically and rotatably mounted to the main body part, the jack A is so constituted as to be provided with means 19, 20 and 21 and the like, capable of fixing the elevator part R at a position to which the elevator part R has been raised up as specified.

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, which is used to fix the vehicle body immovably when restoring and repairing the vehicle body.

[0002]

2. Description of the Related Art Conventionally, when restoring or repairing damage such as a dent that has occurred in a vehicle body of an automobile due to an accident, the vehicle body is immovably fixed to an upper surface such as a floor. In order to fix the vehicle body in such a repair work, a main body fixed upright to the upper surface such as the floor, and a clamp which is a vehicle body fixing jig is attached to the upper end, and the main body is axially mounted vertically and mounted in a horizontal plane. A screw check is used in combination with an elevating unit that freely moves up and down while rotating. Therefore, two screw jacks configured as described above are arranged along each side of the vehicle body, and the vehicle body is fixed by clamping both lower edges of the vehicle body with the clamps.
Repair work is carried out by clamping the concave portion of the vehicle body with a clamp at the tip of the chain extending from the vehicle correcting machine and pulling the clamp.

[0003]

However, when the concave portion of the vehicle body is thus clamped and clamped by the clamp at the tip of the chain extending from the vehicle correcting machine, the concave portion formed on the side surface of the vehicle body is particularly removed. When it is pulled out and restored in the direction perpendicular to the side surface of the vehicle body, the elevating part and the main body part, which clamp the side edge of the vehicle body with a clamp, are merely screwed together, and the elevating part is freely rotated in a horizontal plane. Since the movable portion is movable, the lifting / lowering portion rotates in a horizontal plane with the restoring operation of pulling out the concave portion, and it is difficult to correctly pull out and restore the concave portion to the original position. There was. Therefore, the present invention has been made to solve such a problem in the prior art, and even during a restoring operation of pulling out the concave portion, the vehicle body fixing jig, that is, the elevating portion is prevented from rotating, and the restoring operation is performed. An object of the present invention is to provide a screw jack for fixing a vehicle body that can be easily operated.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a main body fixed upright on an upper surface of a floor or the like, a jig mounted on a body at an upper end, and a shaft perpendicular to the main body. A screw jack comprising a lifting unit which is mounted and rotatably moves up and down while rotating in a horizontal plane, wherein the lifting unit is non-rotatably fixed to the main body at a position where the lifting unit is raised to a predetermined height. Means, and the lifting means is non-rotatably fixed by the fixing means, so that the side edge of the vehicle body can be firmly fixed, and the vehicle body, particularly the side surface, held by a clamp at the tip of a chain extending from the vehicle correcting machine The recessed portion can be easily and correctly pulled out to its original position and restored.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a screw jack for fixing a vehicle body (hereinafter simply referred to as a screw jack A) according to the present invention will be described below with reference to the drawings. Figure 1 shows screw jack A
FIG. 2 is a partial cross-sectional front view, and FIG. 3 is a cross-sectional view taken along line XX of FIG. The screw jack A is configured by combining a main body portion T and an elevating portion R. Body T
Is vertically formed by welding a lower end of a cylindrical outer cylinder 2 having an upper end opened at the center of the upper surface of a square flat plate, and the outer peripheral surface of the outer cylinder 2 and the upper surface of the seat plate 1 are formed. And four reinforcing plates 3 forming a right-angled triangle are fixed at equal intervals and radially. A screw shaft 4 is erected at the center in the outer cylinder 2, and the lower end thereof is fixed to the upper surface of the seat plate 1 by welding. The elevating part R is schematically constituted by a cylindrical inner cylinder 5 having a lower end opened and a vehicle body fixing jig 6 provided on the upper part thereof. The inner cylinder 5 is inserted into the outer cylinder 2 slidably up and down, and a female screw member 7 screwed to the screw shaft 4 is fixed to the lower end opening of the inner cylinder 5. A shaft 8 is provided on the upper part of the inner cylinder 5.
The shaft portion 8 has a through hole 9 penetrating in the diameter direction. An operation rod 10 is loosely fitted in the through hole 9 and rotates the inner cylinder 5 in a horizontal plane.

Further, a cap-like body 11 is loosely mounted on the upper end of the shaft 8. The cap-shaped body 11 has a small screw 12 screwed inward from one side wall against an outer peripheral surface of a concave small-diameter portion 8a provided around the outer peripheral surface of the shaft portion 8 to prevent the cap-shaped body from slipping out. 11 is integrally fixed to the shaft portion 8. The cap-like body 11
A horizontal base 13 is fixed on the upper surface, and a vehicle body fixing jig 6 as a clamp is provided on the upper surface of the base 13. The vehicle body fixing jig 6 is configured as follows. That is, the base 13
Standing walls 14, 14 are opposed to both ends of the upper surface in the lateral direction, and a horizontal shaft 15 is provided between the standing walls 14, 14, and a plate 16 standing upright on the horizontal shaft 15 is skewed. Thereby, the plate 1
6 is supported by the horizontal shaft 15 so as to be slightly tiltable. The plate-like body 16 has a pair of sandwiching pieces 1 that can be tightened to the left and right by tightening bolts 18 and 18 and nuts 18a and 18a.
7, 17 are provided.

The supporting frames 20, 21 for vertically penetrating the connecting rod 19 through the outer cylinder 2 and the outer surface of the cap-like body 11 are provided.
Is fixed. A small screw 22 is screwed onto the outer wall of the support frame 21 provided on the outer peripheral surface of the cap-shaped body 11 and tightened, so that the tip comes into contact with the outer surface of the connecting rod 19, and the connecting rod 19 is displaced. They are held so that they do not fall.

Next, a method of using the screw jack A will be described with reference to FIGS. This screw jack A is laid on the floor along the left and right sides of the vehicle body B on a rail 2
Two pieces are arranged on the upper surfaces of the seat plates 1, respectively, and both ends of the seat plate 1 are placed in the respective rail grooves 24, 24 with the seat plate 1 straddling the rail grooves 24 engraved on the respective rails 23, 23. Is fixed by a pair of fixing fittings 25, 25 that slide. Then, the vehicle body B is temporarily lifted in the order of front or rear by a garage jack (not shown) or the like, and the small screw 22 is loosened for each screw jack A on the side where the vehicle body B is lifted, and the connecting rod 19 is lowered. With the support rod 21 removed from the upper support frame 21, the operating rod 10 is turned to raise the vehicle body fixing jig 6 together with the elevating portion R, and the lower end edges E of the vehicle body B are sandwiched by the holding pieces 17, 17, respectively. The fixing bolts 18 are fastened and fixed. At this time, since the vehicle body fixing jig 6 slightly tilts, it is easy to pinch. Next, the connecting rod 19 is connected to the support frame 2.
1 and the small screw 22 is tightened, whereby the vehicle body fixing jig 6 is fixed to the outer cylinder 2 together with the elevating part R so as not to rotate. In this manner, the same operation is repeated for the remaining two screw jacks A to firmly fix the vehicle body B.

In this state, for example, a clamp at the tip of a chain 26 pulled out of a vehicle correcting machine (not shown) into a concave portion G on the side surface of the vehicle body B in the middle of the two screw checkers A, A arranged on one side. 27, and is pulled and repaired in a direction perpendicular to the side surface of the vehicle body B. At this time, the vehicle body fixing jig 6 holding the lower edge E of the vehicle body B is fixed integrally with the outer cylinder 2 via the connecting rod 19 because the elevating portion R, that is, the cap-shaped body 11 is fixed integrally with the outer cylinder 2. Even when the concave recessed portion G is subjected to an impact when pulled out by the clamp 27 at the tip of the chain 26, the holding pieces 17, 17 holding the lower end edge E of the vehicle body B, that is, the lifting / lowering portion R may rotate. Absent. Accordingly, since the lower end edge E of the vehicle body B is not twisted excessively, the concave portion G can be correctly and easily pulled out and restored to the original position by the vehicle body corrector.

FIGS. 6 and 7 show a screw jack A1 according to another embodiment. Since the basic structure of the main body T and the elevating unit R is the same as that of this embodiment, the same reference numerals are used. The description will be omitted by attaching. That is, in this embodiment, straight vertical grooves 28, 28 are formed in a continuous manner on both sides of the outer peripheral surface from the predetermined position of the shaft portion 8 to the lower end of the inner cylinder 5. Further, through holes 29, 29 which can communicate with the longitudinal grooves 28, 28 on both sides of the outer peripheral surface of the cap-shaped body 11 and the outer cylinder 2.
, And nuts 30, 30,... Are fixed to the outside thereof, and fixing bolts 31, 31,.
Is screwed. When the tips of the fixing bolts 31, 31... Coincide with the vertical grooves 28, 28 and the through holes 29, 29.
28 to come into contact with the inner surface.

Then, the elevating part R is rotated and raised to a predetermined position so that the vertical grooves 28, 28 and the through holes 29, 29 are aligned, and the fixing bolts 31, 31 are screwed together. By protruding the tips into the vertical grooves 28, 28,
The main body portion T and the lifting / lowering portion R are integrally fixed, and rotation of only the lifting / lowering portion R is prevented. The object of the present invention is achieved even by using such fixing means.

[0012]

As described above, the screw jack for fixing the vehicle body according to the present invention is provided with the fixing means for non-rotatably fixing the elevating portion to the main body at the position where the elevating portion is raised to a predetermined height. Therefore, even when the vehicle body correcting machine pulls the concave portion of the vehicle body, particularly the side surface thereof, in a direction perpendicular to the side surface of the vehicle body, the lifting / lowering portion does not rotate in the horizontal plane, and is thus pinched by the screw jack. Since the twisted vehicle body is not twisted, the concave portion can be correctly and easily pulled out and restored to the original state.

[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 front view showing the same part in cross section.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a front view showing a use state of the screw jack.

FIG. 5 is a plan view showing a use state of the screw jack.

FIG. 6 is a side view of a part of a screw jack according to another embodiment.

FIG. 7 is a sectional side view of the same part.

[Explanation of symbols]

 6 Vehicle Fixing Jig 19 Fixing Means (Connecting Rod) 20 Fixing Means (Support Frame) 21 Fixing Means (Supporting Frame) A Screw Jack F Floor R Elevating Section T Main Body 28, 28 Fixing Means (Vertical Groove) 31, 31 Fixation Means (fixing bolt)

Claims (1)

[Claims] 1. A main body fixed upright to an upper surface such as a floor, and a vehicle body fixing jig is mounted on an upper end, and is vertically mounted on the main body to freely move up and down while rotating in a horizontal plane. A screw jack comprising an elevating part, wherein a fixing means for non-rotatably fixing the elevating part to a main body at a position where the elevating part has been raised to a predetermined height is provided. .