JPS6227686Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a metal tightening band used for tightening boots of universal joints, etc.

Conventionally, in order to simplify the installation work, this type of metal tightening band consists of a metal band member 1 bent into a ring shape and having both ends joined together, as shown in FIG.
Lever 3 partially overlapped and fixed on the side of palm part 2
and a stopper 4 which is fixed to a part of the band member 1 and locks the lever 3 in the tightened state.

Then, such a metal tightening band 5 is attached to the second
When used to tighten the boot 7 of the universal joint 6 shown in the figure, the outer ring 8 has a ball 9, a cage 10 and an inner ring 1.
1 and the boot 7 is assembled, put the tightening band 5 over the desired position on the boot 7, use the outer end 3a of the lever 3 as a point of force, use the inner end 3b as a fulcrum, and connect it to the palm part 2. The lever 3 is rotated using the fixed portion as a point of action, and the lever 3 is brought into contact with the band member 1, and in this state, the end portion 3a of the lever 3 is fixed by crimping with a stopper 4.

In this way, the conventional tightening band 5 can be tightened with a very simple operation, but in the tightened state,
As shown in FIG. 3, in a part of the circumference (within the range indicated by arrow c), the band-like member 1 and the lever 3 overlap, and in this part, they are localized compared to other parts of the circumference. The outer diameter surface bulges in the radial direction. Especially at the fixed part between the strip member 1 and the lever 3,
A lever 3 overlaps on one of the band-shaped members 1, and a palm part 2 overlaps and protrudes from the outer peripheral surface of the lever 3.

Therefore, for example, when a car is driven on a rough road, mud, sand, or pebbles thrown up from the road surface accumulates between the car's suspension parts and the universal joint.
When the universal joint 6 is rotating counterclockwise in FIG. 3, the accumulated earth and sand interfere with the tightening band. In this case, interference occurs most frequently at the radially protruding portion of the tightening band 5. Particularly in the portion A near the inner end 3b of the lever, there is only one strip member 1, and wear of this portion A becomes a problem.

In view of the above-mentioned problems of the conventional tightening band, this idea has been improved and eliminated, and reinforcing plates are provided in the parts of the belt-shaped member that are likely to be damaged due to interference with accumulated earth and sand when the tightening band is installed. By doing so, it is an object of the present invention to provide a tightening band that prevents damage to the belt-shaped member during rotation due to wear.

An embodiment of this invention will be described below with reference to FIGS. 4 and 5.

In FIG. 4, 15 is a metal tightening band, 16 is a metal band-like member, 17 is a lever that is thicker and more rigid than the band-like member 16, and 18 is a lever 17 placed along the band-like member 16. This is a stopper for securing the product in the closed position.

The band-shaped member 16 is curved into a ring shape, and its both ends are brought into contact with each other. A lever 17 is superimposed on the outside of one of the parts 19, and the lever 17 is integrally assembled with the lever 17 at an appropriate location by an appropriate method such as spot welding. It's fixed. It is preferable that the lever 17 is curved to match the curvature of the strip member 16 in the attached state. The stopper 18 has, for example, a U-shape as a whole, and the strip member 16
It is fitted into the strip member 16 from the inside to the outer end of the lever 17 in the connected state, and is fixed by suitable means such as spot welding so that the open part is located on the outside. . This stopper 1
8 locks the lever 17 by bending the open portion after the lever 17 is rotated.

This tightening band 15 has a reinforcing plate 21 integrally attached to a part of its outer peripheral surface, that is, to a bent protrusion 20 where the outer band member 16' is made to protrude in the radial direction by the lever fulcrum part 17b in the tightened state. It is fixed.

To tighten the tightening band 15, the lever 17 is rotated with the outer end of the lever 17 as the force point 17a, the inner end as the fulcrum part 17b, and the connecting part 22 with the palm part 19 of the band member 16 as the acting point. Move the lever 17 to the fifth position.
As shown in the figure, the lever 17 is brought into contact with the belt-shaped member 16, and in this state, the force point 17a at the end of the lever 17 is applied to the stopper 1.
It can be fixed by caulking at step 8. Then, the tightening band 15 reduces in diameter and tightens the boot or the like.

In addition, when this tightening band 15 is used as a boot band of a universal joint, the tightening band 15 is
Install so that it rotates in the direction shown by the arrow in the figure. In this way, if dirt and sand that has accumulated between the automobile suspension parts and the universal joint come into contact with each other during rotation, the reinforcing plate 21 protrudes the most in the radial direction, so the accumulated dirt, etc. will be removed by the reinforcing plate 21. will interfere,
Although the reinforcing plate 21 will wear out, the band-shaped member 16 at the bending protrusion 20 is protected by the reinforcing plate 21 and wear due to interference with accumulated earth and sand is prevented, and the band-shaped member 16 is prevented from being damaged by wear. Ru.

By the way, when this type of tightening band is tightened, the portion A near the inner end 17b of the lever mentioned above
In addition, as shown in FIG. 3, a caulking portion also protrudes from the mounting portion B of the fastener 4. There is a problem in that this caulked portion interferes with accumulated earth and sand while the automobile is running, and the caulked portion is pushed open and the lever 3 returns to its original position.

To solve the above problem, as shown in FIGS. 4 and 5, the palm part 19 is extended along the lever 17 and close to the outer end 17a of the lever 17 to increase the overlapping part with the lever 17. In addition, in the tightened state, the gap between the tip of the palm part 19 and the stopper 18 should be made as small as possible, and flush with the outer diameter surface of the caulked part of the stopper 18. As a result, the palm part 19 becomes a protective member for the stopper 18, and the caulked part of the stopper 18 does not protrude in the radial direction, and the corner of the caulked part is pushed out without accumulated earth and sand interfering with it. There isn't.

As explained above, this invention involves stacking and fixing the inner end of a lever to the palm-joining parts of both ends of a belt-shaped member curved into a ring, and bending the palm-joining parts by the lever action of this lever to contract the belt-like member. In a metal tightening band of the type in which the outer end of the lever is secured to the band member with a stopper after tightening the lever, bending of the outer band member of the palm part that occurs near the inner end of the lever when tightened. In order to protect the protrusion, a reinforcing plate was attached to the outer circumferential surface of the part of the outer band-shaped member where the above-mentioned bent part occurs. The fastening band can be easily and quickly fastened to boots, etc., and especially if the fastening band is used as a boot band to fasten and fix boots attached to a universal joint, the radially protruding portion of the fastening band, That is, the bent protrusion is protected by the reinforcing plate fixed to the band member, thereby preventing wear and tear due to interference with accumulated earth and sand. In addition, by extending the palm part along the lever and near the outer end of the lever to reduce the gap between the tip of the palm part and the stopper when tightened,
The stopper is protected by the palm part of the band-shaped member and is not pushed and expanded due to interference with accumulated earth and sand, and is prevented from opening due to restoration of the lever. In short, the present invention can greatly improve the durability of the tightening band, improve the reliability of the product, and exhibit its excellent effects.

[Brief description of the drawings]

Figure 1 is a front view of a conventional metal tightening band before tightening, Figure 2 is a sectional view of the main part of a universal joint showing an example of how the tightening band is used, and Figure 3 is a conventional tightening band. FIG. 4 is a front view of the tightening band according to the present invention before tightening, and FIG. 5 is a front view of the tightening band after tightening. 15... Metal tightening band, 16... Band member, 17... Lever, 18... Stopper, 19...
...palm joint, 21...reinforcement plate.

Claims (1)

[Claims for Utility Model Registration] (1) The inner end of a lever is overlapped and fixed to the palm-joining portions of both ends of a belt-shaped member curved into a ring shape, and the palm-joining portions are bent by the lever action of the lever to create a belt-like member. In a metal tightening band of the type in which the outer end of the lever is contracted to the band member with a stopper after reducing the diameter of the lever, the outer band member of the palm part that occurs near the inner end of the lever when tightened. A metal fastening band characterized in that a reinforcing plate is attached to the outer circumferential surface of the outer band-like member at a portion where the bent portion occurs in order to protect the bent portion. (2) The palm part extends along the lever and close to the outer end of the lever so that when tightened, the gap between the tip of the palm part and the stopper is as small as possible. A metal fastening band according to claim 1 of the utility model registration claim, characterized in that: