JP2004156768A - Rubber sheet for water service - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin and rigid sheet for a rubber packing material for water service capable of preventing penetration and leakage of water through an intermediate layer of the rubber packing material fitted to a water service pipe, and facilitated in fitting work and manufacture. <P>SOLUTION: A stainless steel metal net 12 is placed on a sheet 11a for the rubber packing material formed from rolled styrene butadiene rubber, and a sheet 11b for the rubber packing material formed from rolled styrene butadiene rubber is placed thereon, and they are heated and pressured. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a rubber sheet for water service used as a rubber packing material for preventing water leakage from a seam of a pipe, for example, in a water pipe.
[0002]
[Prior art]
As a conventional rubber sheet for a water supply used as a rubber packing material, there is a water sealing rubber sheet in which a cloth is embedded and integrated as a reinforcing material in an intermediate layer of the rubber packing material sheet. In addition, as a packing material for preventing water leakage, as in a rubber packing material disclosed in JP-A-7-260062, a plate-like, film-like, paste-like, or composite material of these is used between sealing layers made of water-expandable rubber. Some materials are sandwiched or buried.
[0003]
[Problems to be solved by the invention]
However, the rubber packing punched from the rubber sheet for water supply in which the cloth is embedded in the intermediate layer has a problem that water permeates and leaks into the cloth embedded in the intermediate layer due to water pressure, that is, causes leakage.
[0004]
Further, a rubber packing material in which a high ionization tendency auxiliary material made of a plate, a film, a paste, or a composite thereof is sandwiched or buried between the seal layers has a problem that the work of attaching to a pipe becomes difficult due to its thickness. There is. In particular, since the plate-like reinforcing material is thick, it is difficult to drill holes such as screw holes for fixing to flanges etc. after embedding the plate-like reinforcing material in the intermediate layer of the rubber packing material sheet Problem.
[0005]
SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a water-supply rubber for a rubber packing material that does not leak from the intermediate layer of the rubber packing material attached to the pipe, is thin, has high rigidity, and can be easily and easily manufactured. It is an object to provide a seat.
[0006]
[Means for Solving the Problems]
The present invention, in order to solve the above-mentioned problems, is a sheet for a rubber packing material for preventing water leakage from a joint of a pipe, and is used for a water service in which a net-like body or a thin plate-like body is embedded and integrated as an intermediate layer of the rubber packing material. The rubber sheet is a flat plate.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a rubber sheet for water supply of the present invention will be described with reference to the accompanying drawings.
[0008]
FIG. 1 is a perspective view showing a water-supply rubber sheet 1 according to the present invention. A stainless steel wire mesh 12 is placed on a rubber packing material sheet 11a made of rolled styrene-butadiene rubber, and further rolled thereon. The rubber packing material sheet 11b made of styrene butadiene rubber is placed and heated and pressed.
[0009]
FIG. 2 is a cross-sectional view of the water-supply rubber sheet 1 shown in FIG. 1. The rubber packing material sheets 11a and 11b made of styrene-butadiene rubber are vulcanized and bonded by heating under pressure. It is embedded and integrated as the intermediate layer 13.
[0010]
FIG. 3 is a cross-sectional view showing another embodiment of the water-supply rubber sheet 1 using a thin plate instead of the wire mesh of FIG. 1. The rubber packing material sheets 11a and 11b made of styrene-butadiene rubber are pressurized. A rubber bonding steel sheet 14 (manufactured by Nippon Steel Corporation, trade name “View Coat”), which is vulcanized and bonded by heating and zinc-treated on the surface, is embedded and integrated as an intermediate layer 13. The thickness of the steel plate 14 is 0.08 mm to 0.15 mm. The hardness of the steel plate 14 does not hinder the punching of the packing material.
[0011]
FIG. 4 is a cross-sectional view showing an attached state of a rubber packing material 31 obtained by punching out an annular shape from the water-supply rubber sheet 1 of FIG. 2, and the rubber packing material 31 is sandwiched between the flanges 21, 21 of the pipe 22. When the bolts 23 and the nuts 24 are tightened, the inner side surfaces of the flanges 21 and the both side surfaces of the rubber packing material 31 come into contact with each other, and are tightly fixed.
[0012]
The present invention is not limited to the above-described embodiment, and may be not only a stainless steel wire mesh, but also a mesh formed of a metal or resin that is not easily rusted, such as aluminum. It may be stamped and used as a rubber packing material used for a water supply pipe.
[0013]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0014]
According to the present invention, by embedding a reinforcing material such as a net or a thin plate in the intermediate layer of the rubber packing material sheet, water does not penetrate into the intermediate layer, so that the rubber packing for water supply can be stamped. It is possible to prevent seepage leakage. In addition to being able to mold the water-supply rubber sheet to a thin thickness, when fixing the rubber packing material, it is not only easy to install, but also has a strong resistance to damage to the rubber packing material due to excessive tightening of screws and high rigidity. A rubber sheet for water supply can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a rubber sheet for water supply of the present invention.
FIG. 2 is a sectional view showing a rubber sheet for water supply of the present invention.
FIG. 3 is a sectional view showing another embodiment of the rubber sheet for water supply of the present invention.
FIG. 4 is a cross-sectional view showing a mounting state of a rubber packing material made of the rubber sheet for water supply in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water supply rubber sheet 11a, 11b Rubber packing material sheet 12 Wire mesh 13 Intermediate layer 14 Thin plate 21 Flange 22 Pipe 23 Bolt 24 Nut 31 Rubber packing material

Claims (2)

A sheet for a rubber packing material for preventing water leakage from a seam of a pipe, wherein the netting body is embedded and integrated as an intermediate layer of the rubber packing material. The water-supply rubber sheet according to claim 1, wherein the intermediate layer comprises a thin plate.

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