JPH01285452A - Clamping device - Google Patents

Abstract

PURPOSE: To secure a chain while straining the chain by forming a vertical surface and a horizontal surface having an L-shaped cross section so as to abut on a vehicle frame, and forming a back surface of the vertical surface with a projection to be locked with one end of a chain, and connecting the other end of the chain to a locking bolt under the horizontal surface, and fastening it with a nut. CONSTITUTION: As a clamping device for repairing device for resetting a vehicle having an accident and deformed by collision to the original condition with a straightening tool, a support bracket having a vertical surface 5 having an L-shaped cross section and a horizontal surface 12 is provided so as to abut on a vehicle frame 11. A back surface of the vertical surface 5 for abutting on the frame 11 is provided with a projection 15, and one end of a chain 6 is fixed to the projection 15 by a dolly block 18. The other end of the chain 6 is connected to a head part of a locking bolt 13, and fastened by a nut 14 so as to strain the chain 6 stretched around the frame 11. A repairing device having a straightening tool is thereby secured to the frame in the condition that the chain is strongly tensed.

Description

[Detailed Description of the Invention] Technical Field This invention fixes a deformed vehicle at a fixed position on a straightening bench, applies tension and straightening force to the vehicle on the bench, and restores the vehicle to its original undeformed state. This invention relates to a clamping device for restoring the state.

The invention is particularly intended for fixing load-bearing frame parts, for example frame parts of so-called box-frame vehicles, on straightening or aligning benches for straightening purposes.

BACKGROUND PRIOR ART Clamping devices of this type have been known to date. An example of a clamping device is U.S. Patent No. 366,943.
No. 9, this invention is for fixing a cylindrical generator, a motor, etc. by means of a clamping chain. However, this chain is only capable of securing non-load-bearing objects.

Known chain clamps are not suitable for use when large loads are applied to an object while it is held in a fixed position. An example of such an object, or body, is a deformed vehicle, which can be corrected by clamping it on a straightening and alignment bench, subjecting it to tension and straightening forces, and returning the vehicle to its exact original position. It must be restored to its undeformed state.

Known clamping devices also have other drawbacks. For example, in the case of the known chain clamping device,
One end of the chain is secured in place by a locking pin inserted between two adjacent links of the chain. This method of fixing the chain easily causes chain wear and makes chain positioning difficult. Furthermore, when the object fixed by the clamping device receives a large tension force, it is transmitted to the locking bin, which tends to cause deformation of the bin.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to be able to hold a fixed frame member in its intended position even when large tensioning and straightening forces are applied to the frame member, and which is more effective than conventional clamping devices. also has a simple structure,
The object of the present invention is to provide a highly reliable clamping device.

This object is achieved by a clamping device constructed according to the invention and having the features set out in the first claim.

Developments of the invention are set out in the dependent claims.

The invention is based on the concept that a part of the chain should be inserted into the chain clamping pocket and fixed to the clamping member by friction. Therefore, stability and reliable locking action of the chain can be obtained in a simple manner.

The present invention will be explained in detail below.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Figure 1 shows a chain clamping device (1) of the invention, which includes a metal housing (2) forming a support means for the object to be secured by the clamping device.
Consisting of This housing (2) is shown separated in FIGS. 6-7. The housing (2) consists of a slightly inclined completely open side wall (3), a briefly closed upright wall (4) and spaced side walls (3) opposite each other. The upright wall (4) has a portion (5) extending vertically across the plane of the horizontal upper surface (12) connecting the tips of the side walls (3) and (4), and as described below, this A mounting flange (5) is formed for fixing one end of the chains (6), (7).

The housing (2) is secured to the guide means (
9) movably mounted on the top (Fig. 1). The beam (9〉) is mounted and fixed on an alignment or straightening bench (10), which is of the usual kind, for straightening the deformed vehicle chassis and restoring the original deformation. This is to support it so that it can be restored to its original state.

The chassis is held firmly by a plurality of clamping devices (1) constructed according to the invention. The vehicle of FIG. 1 is a so-called box frame vehicle, which is a vehicle having a frame member extending around the chassis, as indicated by the dashed frame member (11). In the embodiment of the drawing, the frame member (11) is the object to be clamped by the clamping device (1).

As shown in Figures 1, 6 and 7, the horizontal surface (12) of the housing (2) and its attachment to the flange (5) are connected to the frame member (11) by a sliding fit.
) The right-angle mount forms a section for supporting the mount at an angle.

The clamping device (1) has chains (6), (7) attached to it, which chains are arranged in a horizontal plane (
12) through the openings (12a), (12b) of the frame member (11) and the upright flange (5).
Leading above the upper edge, said edge has two rectangular recesses (5a), (5b) formed in it, the width of which essentially corresponds to that of the chain. chain(
6) and (7) are composed of a number of links rotatably connected to each other and can flex only in a single plane, like the roller chain of a bicycle sprocket drive mechanism. Although not shown, the chain may consist of a series of flexibly connected links. The two chains are identical to each other,
Here, only one chain (6) will be explained.

A screw tensioning device (13) consisting of a block and a spindle (one of which is shown in Figure 1) is arranged within the housing (2) and is connected to the housing wall (5).
) can be tightened by a nut (14) in contact with the outer surface (5c) of the One end (6a) of chain (6)
is rotatably connected to the tensioning device (13),
The other end (6b) of the chain (6) is locked to said outer surface (5c). In the embodiment of the drawing, the outer surface of the flange (5c
) has a horizontally extending substantially cylindrical rib (15) provided thereon, which may be integrally molded with the flange 1 or welded thereto.

Two outwardly projecting screws (16), (17) are arranged on the rib (15) at a distance approximately equal to the spacing of one link from the rib (15). Furthermore, a clamping bar (18) with holes arranged in positions corresponding to the screws (16), (17) is arranged on the screws and fixed to the outer surface (5c) by a nut,
The clamping bar has a second clamping bar for holding the other end (6b) of the chain in locking engagement with the flange (5).
It forms a clamping device.

As is clear from Figures 1 and 2, the chain (6
) is from the screw tensioning device (13) to the horizontal surface (12
) through the opening (12a) of the frame member (11).
is guided around the recess (5) in the edge of the flange (5).
a) and above the rib (15), the link is pushed below the rib and pressed against the outer surface (5) of the flange, as shown in Figure 3, and the clamping bar (18
) is firmly clamped in this position. after that,
The nut (14) is turned and the screw tensioning device (1
The spindle 3) is tightened and the chain (6) is tightened (Figure 4).

As is clear from Figures 3 and 4, the chain (6
) is forced under the rib (15) and pressed against the outer surface (5c) of the flange, causing the end of the chain (1
5) is the clamping bar (18) and the outer surface of the flange (5)
c) Tightly clamped between. Therefore, the mounting part (
5), in the direction of the chain (6) away from (12>) and in the direction towards the tip (6b) of said chain,
A chain clamping hole is formed by the rear surface of the rib (15) and the outer surface (5c) of the flange, and the tip (6b) of the chain is clamped by the clamping bar (18), and the outer surface (5c) of the flange is clamped by friction.
and held against the rear surface of the rib (15).

The chain clamping pocket in the embodiment of the drawings consists of a hollow formed by a rib (15) on the outer surface (5c) of the flange, but the clamping pocket can be replaced by a recess (not shown) provided in the outer surface (5c) of said flange. The end (6b) of the chain (6) may be pushed into the recess by a clamping bar (18), accommodated and held.

In order to be able to hold the frame member (11) as firmly and reliably as possible, the vertical extension of the mounting flange should be such that the bottom surface of each turn (5a), (5b) is aligned with the top surface of the rim member (11). is placed directly under the chain (
6) is arranged towards said surface and is configured to traverse its entire extension. To improve stability, when the chain is tightened, a thread tensioning device (
13) causes the chain end (6a) to be pulled slightly around the lower left corner of the frame member (11) (see Figure 4), and the chain
) (the left side of the frame member (11) in FIG. 4). Therefore, one side of the frame member (the right side in FIG. 4) and the lower surface of the frame member are in contact with the upper surface and the other side (the left side in FIG. 4) of the frame member by the chain (6).
), (12), and the chain (6) and attachment parts (5), (12) contact the frame member over its entire circumference. In the embodiment of the drawing, the mounting part (5)
, (12) and chain (6) each contact approximately half the circumference of the frame member.

[Brief explanation of the drawing]

FIG. 1 shows alignment for straightening a deformed automobile chassis, that is, the chain clamping device of the present invention attached to a guide frame placed on a straightening bench absorbs a load consisting of a portion of the vehicle chassis. FIGS. 2 to 4 are explanatory diagrams showing three stages of fixing the clamping device of FIG. 1 to a frame member receiving a load; FIGS. 5 is an enlarged perspective view of the chain fixing device forming part of the clamping device of FIG. 1, and FIGS. 6 and 7 are enlarged views of the support means forming part of the clamping device of FIG. FIG. (1)...... Clamping device (2)... Support means (5), (12)... ...Tana (5c), (15)...Chain clamping blur・
(6) ・・・・・・・・・・・・ Clamping chain <11) ・・・・・・・・・・・・ Frame members (13), (14)・...First chain fixing means (15) ...Protrusion (18) ...Second chain Fixing means patent applicant: Akutie Boraget Samefa Agent: Kenbu Arata (1 other person)

Claims (4)

[Claims] (1) Fix the deformed vehicle in a fixed position on a correction bench,
A clamping device for restoring the vehicle to its original undeformed state by applying tension and straightening force to the vehicle on the bench, the clamping device comprising a frame member that receives the load of the vehicle by a sliding fit ( (11) can accommodate (5), (12
), at least one clamping chain (6) for making clamping contact with said frame member (11) and for pressing and holding said frame member (11) against said mounting part; first chain fixing means (13) capable of fixing a first end (6a) of a chain to said support means, applying tension to said chain and clamping said frame member (11) to said attachment part; , (14) and the second
second chain fixing means (18) for fixing the end (6b) to said support means, said support means (2) having a surface (5c) provided with projections (15); Chain clamping pocket (5c), (15)
, the second chain fixing means includes a clamping member capable of clamping a portion of the chain into the chain clamping pocket by friction.
18) A clamping device comprising: (2) The attachment portions (5), (12) and the chain fixing means (13), (14), (18) are such that the chain (6) and the attachment portion are substantially attached to the frame member (1).
1) Clamping device according to claim 1, characterized in that it is formed and arranged to be arranged around the entire circumference of the clamping device. (3) Clamping according to claim 2, characterized in that the attachment parts (5), (12) and the chain (6) are each arranged approximately half a circumference of the object (11). Device. (4) The first to third chains are characterized in that the chain (6) is composed of a plurality of rotatably connected links, and the chain can only be bent in a single same plane.
A clamping device according to any of the claims.