JPH0726599A - Faucet casing and sealing method of water path thereof - Google Patents

Abstract

PURPOSE:To increase the assembling workability and sealing ability. CONSTITUTION:At first, an operator or an assembling device inserts an inner cylinder 6 into an outer cylinder 5 and fits thereto to position them. Next, a thermosetting liquid seal material made of silicon is infected from one infection hole 12 formed in the outer cylinder 5 by an injector. Then the liquid sealing material flows into the seal groove 10 of a partition wall 7 separating the water path from the injection hole 12 and spreads all over the whole and reaches the other outlet opening 13 formed in the outer cylinder 5. Thereafter, the faucet casing 1 is heated for a specified period of time to harden the liquid seal material so as to seal the water path.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet casing and a method for sealing a water passage thereof, and more particularly to a technique for improving its assembling workability and sealing performance.

[0002]

2. Description of the Related Art In recent years, a double-tube type faucet casing has been proposed in which a synthetic resin inner cylinder is inserted and fitted into a metal pipe outer cylinder, and a water passage is formed in the space between them. Has been done.

In FIG. 6, a faucet casing 1 has an outer cylinder 5 made of brass and having an outer surface to which hot water supply pipes 2, water supply pipes 3 and spouts 4 are connected, and an inner cylinder 6 to be inserted and fitted into the outer cylinder 5. It is formed from and. As shown in FIG. 7, the inner cylinder 6
Has an outer diameter smaller than the inner diameter of the outer cylinder 5, and a space therebetween is partitioned by an annular or linear partition wall 7 projecting from the outer surface of the inner cylinder 6, and a hot water or water flow passage 8, 9 is formed. A V-shaped seal groove 10 that opens toward the inner surface of the outer cylinder 5 is continuously formed in the partition wall 7, and a packing 11 made of synthetic rubber is fitted into the seal groove 10 to form a water passage 8. , 9, etc. are sealed. A mixing ratio adjusting unit and a flow rate adjusting unit (not shown) are mounted in the hollow portion of the inner cylinder 6.

[0004]

The above-mentioned double pipe type faucet casing has the following problems. When assembling the faucet casing 1, the inner cylinder 6 in which the packing 11 is fitted in the seal groove 10 in advance is inserted into the outer cylinder 5 to be fitted, but in order to perform sealing to prevent leakage due to water pressure, It is necessary to set the shape and size of the packing 11 so that the packing 11 is strongly pressed against the inner surface of the outer cylinder 5 in the assembled state. Therefore, when the inner cylinder 6 is inserted into the outer cylinder 5,
The frictional resistance between the packing 11 and the inner surface of the outer cylinder 5 naturally increased, and the work was extremely difficult. Also, the outer cylinder 5
If there are minute projections, rough surfaces, etc. on the inner surface, the packing 11 is caught during insertion, and there is a problem that part of the packing 11 is damaged. Further, when the packing 11 is a combination of an annulus and a straight line, the manufacturing die has to adopt a complicated shape and configuration, and it is greatly repaired due to the manufacturing or design change. There was also a problem that it took a long time.

Therefore, an object of the present invention is to provide a method for sealing a water passage of a faucet casing and a faucet casing which solve the problems of the above-mentioned prior art and improve assembly workability and sealability. And

[0006]

In order to achieve the above object, the faucet casing of the present invention comprises an outer cylinder constituting an outer casing of the casing, and an inner cylinder fitted to the outer cylinder with a predetermined gap. , A partition wall having a continuous seal groove that is provided so as to project from the outer surface of the inner cylinder and faces the outer cylinder side surface, and a liquid perforated in the pipe wall of the outer cylinder at a position communicating with the seal groove A sealing material injection port is provided.

Further, in the method of sealing the water passage of the faucet casing of the present invention, the space between the outer cylinder and the inner cylinder constituting the faucet casing is divided by the partition wall projecting on the outer surface of the inner cylinder. A method of sealing a water passage formed by the method, wherein after inserting the inner cylinder into the outer cylinder, a pipe wall of the outer cylinder is provided at a position communicating with a seal groove provided in a partition wall of the inner cylinder. A liquid sealing material is injected into the seal groove from a liquid sealing material injection hole that is perforated, and the liquid sealing material is cured to seal the water passage.

[0008]

According to the present invention, the inner cylinder is inserted into the outer cylinder in a state where the packing is not fitted, and then the liquid sealing material is injected into the seal groove through the injection hole of the outer cylinder so that the liquid sealing material is spread over the whole, and thereafter, at room temperature or heating. The liquid sealing material is cured in this state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, in the faucet casing 1 of this embodiment, a partition wall 7 is provided on a pipe wall near both ends of the outer cylinder 5.
One injection port 1 communicating with the continuous sealing groove 10
2 and 13 are perforated. The inlets 12 and 13 are
An opening is formed on the same line as the connection position of the hot water supply pipe 2 and the hot water supply pipe 3, that is, a portion which becomes a back surface when the hot and cold water mixing valve is attached. A partition wall 7 having a continuous sealing groove 10 is provided on the outer surface of the inner cylinder 6 in the same manner as the conventional product, but no packing is fitted into the sealing groove 10 during assembly.

In this embodiment, as shown in FIG. 2, an operator or an assembling apparatus first inserts and fits the inner cylinder 6 into the outer cylinder 5 for positioning. At this time, since there is no packing unlike the conventional product, the work can be performed very easily. Next, as shown in FIG. 3 (enlarged sectional view of portion A in FIG. 2),
The nozzle 14 of the liquid sealing material injection device is pressed against one injection port 12 of the outer cylinder 5 to inject a thermosetting liquid sealing material (for example, liquid rubber, adhesive, etc.) 15. The injected liquid sealing material 15 has the sealing groove 10 of the partition wall 7 continuous, and thus reaches the other injection port 13 after the liquid sealing material 15 is spread over the whole as shown in FIG.

When the liquid sealing material 15 leaks from the inlet 13, the faucet casing 1 is then carried into a constant temperature bath or the like and heated for a predetermined time. Then, the liquid sealing material 15 is hardened into rubber, and the water passages 8 and 9 are reliably sealed.
As shown in FIG. 5, since the liquid sealing material 15 also penetrates into the gap between the inner surface of the outer cylinder 5 and the partition wall 7, the sealing is performed with a wider width than the conventional solid packing. Therefore, it is possible to make a reliable seal without leakage of water or water due to water pressure. The liquid sealing material 15 is preferably a silicon-based material that is unlikely to cause hydrolysis even when it comes into contact with hot water.

Although the description of the specific embodiment has been completed, the embodiment of the present invention is not limited to this embodiment. For example,
As the liquid sealing material, a urethane type material or a room temperature curing type material may be used. Further, although the present invention is applied to the faucet casing of the hot and cold water mixing faucet in the above embodiment, it may be applied to other types of faucet casings. Further, the number of inlets to be bored in the outer cylinder may be one or three or more.

[0014]

As is apparent from the above description, according to the present invention, the insertion / fitting of the inner cylinder into the outer cylinder becomes extremely easy, and the workability of assembling the faucet casing is improved. In addition, the packing is not damaged during assembly as in the conventional product, and the sealing area is increased, so that reliable sealing is possible. Further, since a mold for manufacturing the packing is unnecessary, simplification of the faucet casing manufacturing equipment and cost reduction are realized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a faucet casing according to the present invention.

FIG. 2 is a perspective view showing a state in which the faucet casing of the embodiment is assembled.

FIG. 3 is an enlarged sectional view of part A in FIG.

FIG. 4 is a perspective view showing a state in which a liquid sealing material is injected into the faucet casing.

FIG. 5 is an enlarged sectional view of an essential part showing a state in which a liquid sealing material is injected into the seal groove.

FIG. 6 is an exploded perspective view showing a conventional faucet casing.

7 is a cross-sectional view of a main part of the faucet casing shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Faucet casing 5 Outer cylinder 6 Inner cylinder 7 Partition wall 8,9 Water passage 10 Seal groove 12,13 Injection port 14 Injection device 15 Liquid sealing material

Claims (2)

[Claims] 1. An outer cylinder forming a casing of a casing, an inner cylinder fitted into the outer cylinder with a predetermined gap, and an outer cylinder protruding from the outer surface of the inner cylinder and facing the outer cylinder side surface. A faucet casing comprising: a partition wall having a continuous seal groove, and an inlet for a liquid sealing material formed in a pipe wall of the outer cylinder at a position communicating with the seal groove. 2. A method for sealing a water passage formed by partitioning a space between an outer cylinder and an inner cylinder constituting a water faucet casing with a partition wall projecting from an outer surface of the inner cylinder. ,
After inserting the inner cylinder into the outer cylinder, at a position communicating with the seal groove provided in the partition wall of the inner cylinder, from the injection port of the liquid sealing material bored in the pipe wall of the outer cylinder into the seal groove. A method for sealing a water passage of a faucet casing, which comprises injecting a liquid sealing material into a container and curing the liquid sealing material to seal the water passage.