JPH0222375Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chain tensioner for repairing an automobile frame.

When modifying the frame of a car, frame 4
After supporting the parts with frame supports, a chain is attached to the frame, and the chain is tensioned with a tensioner to correct the frame.

Conventional products include the applicant's Intention No. 54417, shown in Figure 1 (approval for registration dated February 29, 1980).
There is something.

This product has chain retaining claws on both ends, and the chain is hooked on by determining the spacing between the chain retaining claws in advance, then the handle is tilted down and the chain is pulled to tension the chain, but depending on the location. In the past, when the handle was tilted down or raised, it hit the frame or the frame correction machine itself, making it difficult to work smoothly.

The present invention solves these drawbacks and is a chain tensioner for automobile frame repair that can tension the chain smoothly without interfering with the frame or the frame repair machine. It is as follows.

A screw support part 3 is provided at the other end of the inner cylinder 2 which has a chain stopper 1 at one end, and a screw support part 3 is provided at one end of the outer cylinder 4 fitted into the inner cylinder 2 at a position facing the chain stopper 1. A chain retaining pawl 5 is provided, and a threaded rod 6 that is screwed onto the screw bearing portion 3 is held inside by a screw holding portion 13, and the end of this threaded rod 6 is connected to the outer cylinder 4.
A bulging collar body 6 is provided at the end of this threaded rod 6, protruding from the end.
A bearing 12 is interposed between the bulging flange body 6b and the screw holding portion 13, and a socket 9 for inserting an impact wrench 8 is connected to the end of the threaded rod 6 via a universal joint 7. The outer cylinder 4 is connected to the inner cylinder 2 by chain stoppers 1 and 5.
This relates to a chain tensioner for repairing an automobile frame, characterized in that the threaded rods 6 are slidably fitted in a non-rotating state so as to face each other, and the tip of the threaded rod 6 is screwed onto the threaded support part 3 of the inner cylinder 2.

In the figure, 10 is a keyway, 11 is a key, and 12 is a thrust bearing.

Since the present invention is configured as described above, the socket 9
When the impact wrench 8 is inserted and rotated, the inner cylinder 2 and outer cylinder 4 move in and out due to the screw action of the threaded rod 6, and when the inner cylinder 2 and outer cylinder 4 are brought together, they are pulled by the chain retaining claws 1 and 5. The suspended chain 14 is pulled and stretched.

In this case, the inner cylinder 2 and the outer cylinder 4 can be moved in and out by the screw action, and the chain 14 can be quickly stretched, so that the work efficiency is increased accordingly.

Furthermore, since the socket 9 is not provided directly on the threaded rod end 6a of the threaded rod 6, but is provided via the universal joint 7, the impact wrench 8 can be attached to the frame 8, the frame 15, or the frame correction machine. If it gets in the way of the frame 15, frame correction machine,
Further, chain tensioning work can be carried out without getting in the way of the chain 14.

Since the chain retaining claws 1 and 5 for hanging the chain are provided at positions facing each other, the axial direction P of the threaded rod 6 and the pulling direction Q of the chain are parallel to each other.

Therefore, the threaded rod 6 can be threaded very smoothly, and the chain can be pulled smoothly.

Further, a bulging collar body 6b is formed at the end of the threaded rod 6,
Since the bearing 12 is interposed between the bulging collar body 6b and the screw holding portion 13, the screwing motion of the threaded rod 6 becomes even better, and the chain can be pulled smoothly.

In addition, since the impact wrench 8 can be used in a position where it is easy to work, strong rotational torque can be transmitted to the threaded rod 6 and highly efficient chain tensioning work can be carried out, which has excellent practical effects.

[Brief explanation of the drawing]

Figure 1 is a slope view of the conventional product, Figure 2 is a slope view of the proposed product, Figure 3 is a front sectional view of the proposed product, Figure 4 is a front view showing the proposed product in use, and Figure 5 is a front view of the proposed product. It is an enlarged front view of the main part. 1... Chain retaining claw, 2... Inner cylinder, 3... Screw support, 4... Outer cylinder, 5... Chain retaining claw, 6...
...Threaded rod, 6a...Threaded rod end, 7...Universal joint, 8...Impact wrench, 9...
...socket.

Claims (1)

[Scope of utility model registration request] A screw support part 3 is provided at the other end of the inner cylinder 2 which has a chain stopper 1 at one end, and a threaded support part 3 is provided at a position facing the chain stopper 1 at one end of the outer cylinder 4 into which the inner cylinder 2 is fitted. A chain retaining pawl 5 is provided, and a threaded rod 6 that is screwed onto the screw bearing portion 3 is held inside by a screw holding portion 13, and the end of this threaded rod 6 is connected to the outer cylinder 4.
A bulging collar body 6 is provided at the end of this threaded rod 6, protruding from the end.
A bearing 12 is interposed between the bulging collar body 6b and the screw holding portion 13, and a socket 9 for inserting an impact wrench 8 is connected to the end of the threaded rod 6 via a universal joint 7. The outer cylinder 4 is connected to the inner cylinder 2 by chain stoppers 1 and 5.
A chain tensioner for repairing an automobile frame, characterized in that the threaded rods 6 are slide-fitted in a non-rotating state so as to face each other, and the tip of a threaded rod 6 is screwed onto a threaded support part 3 of an inner cylinder 2.