JPH0221413Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for fixing a rubber case by tightening the rubber case with a band through a buckle portion.

FIG. 1 is a partially cutaway plan view showing a conventional tightening structure of this type, and FIG. 2 is an enlarged side sectional view thereof. As shown in the figure, attach rubber case 1 and band 2.
The band 2 was fastened to the metal fitting 4 with a buckle 3, and the end of the band 2 was bent and held under the buckle 3 to prevent the band 2 from coming off. In such a structure, when the bent portion 5 is tightened, it bites into the surface of the rubber case 1, and the amount of tightening is greater than other portions. As a result, cracks were sometimes generated on the surface of the rubber case 1. Also, bent part 5
Because the dimensions of buckle 3 become thicker, buckle 3 becomes thicker.
This had the disadvantage that a space was formed at both ends of the seal, and the tightness was insufficient compared to other parts, resulting in poor airtightness.

In order to eliminate these conventional drawbacks, the present invention prevents cracks on the surface of the rubber case and eliminates airtightness caused by insufficient tightening by interposing a tapered spacer between the bent part of the band and the rubber case. This is designed to improve tightening performance. An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a side sectional view showing an embodiment of the rubber case tightening structure of the present invention. In the figure, 1 is a rubber case, and 2 is a band for tightening, which is doubly tightened around the rubber case. 3 is Batsukuru,
One end of the band 2 after tightening is held back to fix the band 2. 6 is a spacer and the buckle 3 and
The part where the band bending part 5 touches is made thicker, and the band becomes thinner toward the tip to form a tapered shape. Also, the portion that comes into contact with the surface of the rubber case 1 has a curved cylindrical lower surface to provide a comfortable fit. In this way, the spacer 6 can prevent the band bent portion 5 from digging into the surface of the rubber case 1. Further, since the spacer 6 has a cylindrical lower surface and is tapered, the band tightening force can be transmitted evenly, thereby preventing airtightness caused by insufficient tightening. Furthermore, conventionally, multiple bands were used to prevent poor airtightness, but with the present invention, tightening at one location is sufficient to achieve its purpose.
Note that the spacer is connected to the spacer 7 as shown in FIG.
If a guide 7a is provided in a part of the band 2, the spacer 7 will not come off from the band 2 during tightening work.
Work becomes easier.

In the first embodiment, the spacer 6 and the buckle 3 of the band are separated, but if the band retaining part 8a is integrally formed on the spacer 8 including the buckle as shown in FIG. 5, the tightening work becomes extremely easy. , the tightening performance of the rubber case 1 can be significantly improved.

As explained in detail above, the present invention has the advantages of preventing cracks on the surface of the rubber case, making tightening work easier, and significantly improving airtightness. It is very effective when used for tightening the rubber case and connecting fittings used for tightening or oil supply work.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view showing this type of conventional tightening structure, Fig. 2 is an enlarged side sectional view thereof, and Fig. 3 is a side sectional view showing an embodiment of the rubber case tightening structure of the present invention. , FIG. 4 is a perspective view showing another example of the spacer, and FIG. 5 is a side sectional view showing another embodiment of the present invention. 1... Rubber case, 2... Band, 3... Buckle, 4... Metal fitting, 5... Band bent part, 6,
7, 8... Spacer, 7a... Guide, 8a...
Band retention part.

Claims (1)

[Claims for Utility Model Registration] (1) A tapered spacer having a cylindrical surface is interposed between a rubber case covering a cylindrical surface, a band provided to tighten the top surface of the rubber case, and its buckle. Rubber case tightening structure featuring (2) The rubber case tightening structure according to claim 1 of the utility model registration claim, in which the spacer is integrated with the buckle portion of the band.