JPH0113842Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in a tightening band used for tightening and fixing a member such as a cover to a cylindrical object such as a transmission shaft of a vehicle.

(Prior art) The tightening band conventionally used for the above purpose is made by fixing a lever to the palm part of a thin sheet metal band by overlapping it by spot welding or the like. After bending and tightening the part, the lever was tightened with a stopper to lock it in place. However, in addition to the strip material, separate members such as levers and stops must be prepared and joined together, which increases the number of parts and increases manufacturing costs.In addition, there is a risk that the lever may separate from the strip material. This has the problem of a lack of reliability.

(Problems to be solved by the invention) The present invention solves the problems of the above-mentioned conventional technology, that is, the manufacturing cost is low, the tightening can be performed with constant strength at all times, and the tightening state is reliably maintained. The purpose of this invention is to provide a tightening band that can be used in various ways.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a first engagement hole and a second engagement hole are formed in one plate surface of the metal strip in order from one end. , a first protrusion, a second protrusion, and a third protrusion.

(Function) When tightening, the outer circumferential surface of the cylindrical object is surrounded with the other plate surface of the band material inside, and the second
The protrusion and the third protrusion are fitted into the second engagement hole, the second protrusion is engaged with the edge of the second engagement hole on the first engagement hole side, and the second protrusion is engaged with the edge of the second engagement hole on the first engagement hole side, and The contact surface on the second protrusion side is brought into contact with the edge of the second engagement hole opposite to the first engagement hole, and the first protrusion is fitted into and engaged with the first engagement hole. be.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, the tightening band 10
is made by press-forming a single strip of steel, and the first
In the end portion 11a (left end in FIG. 1), in order from the end side, there is a rectangular hole 12, a first protrusion 14 bent in a direction away from the end, and a rectangular hole 1 in the vicinity thereof.
5 and a long hole 16 of a constant width are formed in the second end 11b, in order from the end side, a triangular protrusion 22, a rectangular hole 23 near the triangular protrusion 22, and a second protrusion 24 bent in a direction away from the end. and a first protrusion 26 are formed. The widths of the rectangular holes 12, 15 and 23 and the elongated hole 16 are approximately equal, and the widths of the first to third projections 14, 24, 26 and the triangular projection 22 are approximately equal, and the width of the former is equal to that of the latter. Slightly wider than width. Further, the heights of the first to third protrusions 14, 24, 26 and the triangular protrusion 22 are approximately equal. The tightening band 10 is curved so that the center portion in FIG. 2 is convex upward.

Next, the tightening of the rubber boot using the tightening band configured as above will be explained.

Using the curve of the tightening band 10, as shown in FIG. 4, bend the tightening band 10 into a ring shape and bend both ends so that the first end 11a is on the outside of the second end 11b. Overlap. Both ends 11a, 1
The amount of overlap of 1b is such that the second protrusion 24 fits into the rectangular hole 12 and engages with the edge thereof. At this time, the triangular protrusion 22 is fitted into the elongated hole 16 and protrudes at a position slightly away from one edge 17a.
A rectangular hole 23 is located inside the elongated hole 16 between the edge 17a and the triangular protrusion 22.

In this state, the inner diameter of the tightening band 10 is considerably larger than the outer diameter of the rubber boot to be tightened. Therefore, if possible, the tightening band 10 temporarily fastened in this way may be inserted into the rubber boot from the side; if this is not possible, the temporarily fastened state When completing the
All you have to do is surround the rubber boots. In addition,
The work of bending the tightening band to temporarily fasten it may be done by hand or by using a prescribed tool.

Tightening band 10 temporarily fastened as shown in FIG.
Tips 30a and 30b of a known tool are inserted between the first protrusion 14 and the end surface of the triangular protrusion 22 on the protrusion 24 side and engaged with the rectangular hole 15, the elongated hole 16, and the rectangular hole 23, and the grip portion is closed. Apply force (not shown) to increase the distance between the tips. Here, since the first protrusion 14 and the triangular protrusion 22 are close to each other, when the distance between them is widened at the tips 30a and 30b of the tool, the first end 11a is attached to the tightening band 10 by the tip 30a.
is pulled approximately in the tangential direction. Therefore, tightening can be easily performed by applying a relatively small force to the tool.

The first protrusion 1 is formed by the tool tips 30a and 30b.
4 and the triangular protrusion 22, the second protrusion 24 comes out of the rectangular hole 12, and the triangular protrusion 22 moves toward the second edge 17b within the elongated hole 16, causing the tightening band to tighten. The inner diameter becomes smaller. When the end surface of the triangular protrusion 22 on the side opposite to the protrusion 24 comes into contact with the second edge 17b of the elongated hole 16, the tool expansion operation is stopped, and the tip 30a approaches the third protrusion 26 with the tip 30b as the center. Rotate the tool in the direction (left rotation direction in Figure 4). Then, as shown in FIG. 5, the first and second ends 11a and 11b reach the position shown by the two-dot chain line in FIG.
The third protrusion 26 is fitted into the elongated hole 16, and the second protrusion 24 is fitted into the elongated hole 16. After that, when the tool tip is removed, the first and second ends 11a and 11b move in the direction in which the overlapping length becomes shorter (in FIG. 5, the first end 11a is on the right and the second end 11b is on the left). the rectangular hole 12 and the third hole as shown in FIG.
The protrusion 26 is engaged with the protrusion 26 . The third protrusion 26 prevents the first end portion 11a from floating. In addition, the second protrusion 2
4 can be engaged with the first edge 17a of the elongated hole 16. In this way, the work of tightening the rubber boots using the tightening band 10 is completed.

The advantages obtained by this embodiment are as follows. First, regarding the manufacturing of the tightening band 10, the manufacturing cost is extremely low because it is manufactured by simply pressing a single steel band, and each protrusion is
4, 22, 24 and 26, holes 12, 16, etc., the sizes and positions can be processed accurately with little variation. Furthermore, during the tightening operation, the triangular protrusion 22 is brought into contact with the second edge 17b as a stopper of the elongated hole 16, and the overlapping part of the tightening band 10 is lengthened, so that the tightening can be performed using a known tool. It can be easily and accurately done by any number of people with one hand, and there is no need to caulk any part when the tightening is completed. Further, since a temporary tightening state is provided, tightening becomes easy and flexibility is provided. Furthermore, after the tightening is completed, even if the third protrusion 26 is lost, the tightened state is maintained by the second protrusion 24, and since the second protrusion 24 protrudes into the elongated hole 16, the tightening band 10 is It is difficult to shift in the width direction, and the amount of protrusion of each protrusion 14, 22, 24, and 26 is suppressed to the necessary minimum, so there is little risk of injury.

It should be noted that the present invention should not be construed as being limited to the above-mentioned embodiments, and it goes without saying that details can be changed and improved within a range that does not impair the spirit of the invention. For example, it is not essential to provide the first protrusion 14.

(Effects of the invention) As described above, in the present invention, since the tightening band is formed from a metal band material, the number of parts is small and it is inexpensive, and it also has a part that acts as a stopper during tightening. It can be tightened with a constant force no matter who is doing the work, and since both ends are double-locked, the reliability of tightening is improved.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is also a side view, and Figure 3 is the same as Figure 1.
The cross-sectional view, FIG. 4, and FIG. 5 are cross-sectional views for explaining the operation, respectively. Explanation of symbols of main parts, 12...first engagement hole,
16...Second engagement hole, 22...Third protrusion, 24
...Second protrusion, 26...First protrusion.

Claims (1)

[Claims for Utility Model Registration] A tightening band for encircling and tightening the outer circumferential surface of a cylindrical object, and a first engagement hole, a first engagement hole, and a second engagement hole are provided in one plate surface of a metal strip in order from one end. 2 engagement holes, a first protrusion, a second protrusion, and a third protrusion, the outer circumferential surface of the cylindrical object is surrounded with the other plate surface of the band material inside, and the third protrusion is The second protrusion and the third protrusion are fitted into the second engagement hole, the second protrusion is engaged with the edge of the second engagement hole on the first engagement hole side, and the second protrusion is engaged with the edge of the second engagement hole on the first engagement hole side. The contact surface on the side opposite to the second protrusion is brought into contact with the edge of the second engagement hole opposite to the first engagement hole, and
A tightening band characterized in that the first protrusion is fitted into and engaged with the first engagement hole.