JPH0523618Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a structure for attaching a cap to a rubber bag, and more specifically, to an improvement in the structure for attaching a cap to a rubber bag used for oil fences, silt fences, etc. .

[Conventional technology]

Conventionally, oil fences, silt fences, etc. have been constructed by connecting cylindrical caps attached to the ends of rubber bags so that the rubber bags are in sequential communication, and gas or liquid is injected from one end of the cap. It is known that gas or liquid can be injected into all rubber bags by doing this.

As shown in Fig. 4, the fitting structure of the cap of this type of rubber bag is such that the cap member, which is made by vulcanizing and adhering a rubber block B to the outer periphery of a metal cylindrical body A, is attached to the end of the rubber bag C. or by placing an unvulcanized rubber block B on the outer periphery of the metal cylindrical body A and then placing an unvulcanized rubber bag body C, C. The entire body is heated under pressure at once to vulcanize and integrate.

[Problems with conventional technology]

However, in any case, the cap mounting structure described above is designed to resist the inflation pressure of the rubber bag only by the interfacial adhesion between the metal cap and the rubber bag. There was a problem in that the repeated stress caused by the injection and discharge of water easily caused deformation and fatigue, and eventually leakage accidents were likely to occur due to interfacial delamination.

In addition, to solve this problem, from both outer surfaces of the rubber bag, press metal fittings E and E are applied to the outer periphery of the cap member as shown in Fig. 5, and fastened with fasteners F and F such as bolts and nuts. Although it is also possible to improve the installation strength by using fasteners F,
There was a problem in which local breakage of the rubber sheet was likely to occur due to excessive tightening of F, and no fundamental solution could be found.

[The problem that the idea attempts to solve]

In view of the above-mentioned problems, this invention provides a structure for attaching a cap to a rubber bag, which is resistant to fatigue failure due to repeated stress caused by pressurization and depressurization, and which prevents leakage accidents over a long period of time. It was made for the purpose of

[Technology to solve problems]

That is, in the structure for attaching the cap of the rubber bag of this invention, the cap, which is formed by integrally extending metal plates in the diametrical direction on the outer periphery of the metal cylinder, is inserted into the edge of the rubber bag. A fastening member in which the front and back sheets constituting the bag, the metal cylinder, and the metal plate are adhered with an adhesive, and a presser metal fitting is applied from the outer surface side of the front and back sheets, and the presser metal fitting penetrates the metal plate. It is characterized by being compressed and fastened.

〔Example〕

Next, an example of this invention will be described.

Figure 1 is an enlarged sectional view of the main parts of an embodiment of this invention.
FIG. 2 is a perspective view showing the base of the embodiment, and FIG. 3 is a sectional view showing the manufacturing state.

The base attachment structure of the rubber bag body of this invention is as shown in FIG. metal cylinder 2A
The rubber bag body 1 is made by inserting a cap 2 on its outer periphery, which is made by welding metal plates 2B, 2B each having approximately the same thickness as the inner rubber layer 1A and extending them in the diametrical direction.
The rubber sheet constituting the metal cylinder 2A and the metal plates 2B, 2B are bonded together under pressure, and the presser metal fittings 4, 4 are applied from the outer surface side of the rubber sheets 1, 1 to penetrate the metal plates 2B, 2B. Fastening members 5, 5
It is constructed by compression fastening.

In the above, the adhesion between the rubber sheet and the cap 2 is as follows:
In addition to adhesive treatment using chlorinated rubber adhesive, third
As shown in the figure, unvulcanized rubber members are sequentially laminated in a press device 6, and the whole is compressed and vulcanized to be bonded at once.Then, as shown in FIG. You may conclude with 5.

[Effect]

In this invention, metal plates 2B, 2B are extended in the diametrical direction and welded to the outer periphery of a metal cylindrical body 2A that injects and discharges air, etc. into the rubber bag, and the rubber The rubber sheets constituting the bag 1 are glued one on top of the other, and the presser fittings 4, 4 are applied, and they are strongly fastened with the fasteners 5, 5, so that the mouthpiece and the rubber sheet are bonded together with no adhesive other than fasteners. Furthermore, since the stress is dispersed between the metal plate and the pressing fitting, no sea surface separation or local breakage occurs around the mouthpiece, and a strong counterforce is exerted.

〔effect〕

As explained above, in this device, the mouthpiece is glued to the rubber sheet via a metal plate extending around the outer circumference of the metal cylinder, and is firmly sandwiched and fixed by the presser metal fittings. It exhibits strong adhesion strength, and does not cause interfacial peeling or local breakage even when subjected to slight repeated stress due to injection and discharge.
It can be made with reliable and high mounting strength.

Furthermore, since the rubber sheet is compressed over a wide area by both the metal plate and the holding plate, it has various practical effects, such as stress concentration can be avoided, and deterioration and fatigue of the rubber sheet due to compression can be prevented.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional view of the main parts of an embodiment of this invention.
FIG. 2 is a perspective view showing the base of the embodiment, FIG. 3 is a sectional view showing the manufacturing state, and FIGS. 4 and 5 are sectional views showing a conventional example.

Claims (1)

[Scope of utility model registration request] A cap made of a metal plate integrally extending in the diametrical direction from the outer periphery of the metal cylinder is inserted into the edge of the rubber bag, and the front and back sheets constituting the rubber bag, the metal cylinder and the metal are inserted into the end edge of the rubber bag. A rubber bag body characterized in that plates are bonded together with an adhesive, a presser metal fitting is applied from the outer surface side of the front and back sheets, and the presser metal fitting is compressed and fastened with a fastening member that penetrates the metal plate. Base mounting structure.