JP3156451B2 - Sealing method for faucet casing and its water passage - Google Patents

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 the workability and sealing property of the casing.

[0002]

2. Description of the Related Art In recent years, a double-tube 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 a space between the two. Have been.

[0003] In FIG. 6, a faucet casing 1 has an outer tube 5 made of a brass tube to which a hot water supply pipe 2, a water supply pipe 3 and a spout 4 are connected on the outer surface, and an inner cylinder 6 inserted and fitted into the outer cylinder 5. And is formed from As shown in FIG.
Has an outer diameter smaller than the inner diameter of the outer cylinder 5, and a space therebetween is defined by an annular or linear partition wall 7 protruding from the outer surface of the inner cylinder 6. 9 is formed. A V-shaped seal groove 10 that opens toward the inner surface of the outer cylinder 5 is formed continuously on the partition wall 7, and a synthetic rubber packing 11 is fitted into the seal groove 10 to form a water passage 8. , 9 and so on. A mixing ratio adjustment unit and a flow rate adjustment unit (not shown) are mounted in the hollow portion of the inner cylinder 6.

[0004]

The above-described double-tube type faucet casing has the following problems. When assembling the faucet casing 1, the inner cylinder 6 in which the packing 11 has been fitted in the seal groove 10 in advance is inserted and fitted into the outer cylinder 5. To prevent leakage due to water pressure, sealing is performed. It is necessary to set the shape and dimensions 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 inserting the inner cylinder 6 into the outer cylinder 5,
Naturally, the frictional resistance between the packing 11 and the inner surface of the outer cylinder 5 was increased, and the work was very difficult. In addition, the outer cylinder 5
In the case where minute projections, rough surfaces, and the like are present on the inner surface of the packing, there is also a problem that the packing 11 is caught at the time of insertion and a part thereof is damaged. Further, when the shape of the packing 11 is a combination of an annular shape and a straight line, the manufacturing die has to adopt a complicated shape and configuration, and the manufacturing and remodeling due to the design change are enormous. There is also a problem that it takes a long time.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for sealing a water passage of a water faucet casing and a water faucet casing which can solve the problems of the above-mentioned prior art, and realize an improvement in assembling workability and sealing performance. And

[0006]

In order to achieve the above object, a water faucet casing according to the present invention comprises an outer cylinder constituting a casing of the casing, and an inner cylinder fitted to the outer cylinder with a predetermined gap. A partition wall protruding from the outer surface of the inner cylinder and having a continuous seal groove facing the surface on the outer cylinder side; and a liquid perforated in a pipe wall of the outer cylinder at a position communicating with the seal groove. And a sealing material injection port.

Further, in the method for sealing a water passage of a faucet casing according to the present invention, a space between the outer cylinder and the inner cylinder constituting the faucet casing is partitioned by a partition wall projecting from an 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, at a position communicating with a seal groove provided in a partition wall of the inner cylinder, a pipe wall of the outer cylinder is provided. A liquid sealing material is injected into the sealing groove from an injection hole of the liquid sealing material perforated in the above, 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 without packing, and then the liquid sealing material is injected into the sealing groove from the injection hole of the outer cylinder to spread over the entirety. The liquid sealing material is cured in the 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 water faucet casing 1 of the present embodiment, a partition wall 7 is provided on the pipe wall near both ends of the outer cylinder 5.
One inlet 1 communicating with the continuous seal groove 10
2, 13 are perforated. In addition, the injection ports 12 and 13
The hole is opened on the same line as the connection position of the hot water supply pipe 2 and the water supply pipe 3, that is, at a position that becomes the back surface when the hot water mixer tap is attached. Further, a partition wall 7 having a continuous seal groove 10 is projected from the outer surface of the inner cylinder 6 as in the conventional product, but the packing is not fitted into the seal groove 10 at the time of assembly.

In this embodiment, as shown in FIG. 2, first, a worker or an assembling apparatus inserts and fits the inner cylinder 6 into the outer cylinder 5 to perform positioning. At this time, since there is no packing unlike the conventional product, the operation can be performed very easily. Next, as shown in FIG. 3 (enlarged sectional view of a portion A in FIG. 2),
A nozzle 14 of a liquid sealing material injection device is pressed against one injection port 12 of the outer cylinder 5 to inject a heat-curable liquid sealing material (for example, liquid rubber, an adhesive or the like) 15. Since the sealing groove 10 of the partition wall 7 is continuous, the injected liquid sealing material 15 reaches the other injection port 13 after spreading 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 thermostat or the like and heated for a predetermined time. Then, the liquid sealing material 15 hardens into a rubber state, and the water passages 8 and 9 are securely sealed.
As shown in FIG. 5, the liquid sealing material 15 also penetrates into the gap between the inner surface of the outer cylinder 5 and the partition wall 7, so that the sealing is performed with a wider width than the conventional solid packing. Therefore, reliable sealing without hot water or water leakage due to water pressure can be achieved. In addition, as the liquid sealing material 15, a silicon-based material that does not easily undergo hydrolysis even in contact with hot water is preferable.

Although the description of a specific embodiment has been completed above, embodiments of the present invention are not limited to this embodiment. For example,
A urethane-based material or a room-temperature-curable material may be used as the liquid sealing material. In the above embodiment, the present invention is applied to a faucet casing of a hot and cold water mixing faucet, but may be applied to other types of faucet casings. Further, the number of injection ports 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 and 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 at the time of assembly as in the conventional product, and the sealing area is increased, so that reliable sealing can be achieved. Furthermore, since a mold for packing is not required, simplification of the faucet casing manufacturing equipment and cost reduction are realized.

[Brief description of the 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 where the faucet casing of the embodiment is assembled.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 2;

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

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

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

FIG. 7 is a sectional view of a main part of the faucet casing shown in FIG. 6;

[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

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E03C 1/042 F16K 27/00

Claims (2)

(57) [Claims] 1. An outer cylinder constituting a casing of a casing, an inner cylinder fitted to the outer cylinder with a predetermined gap, and protruding from an outer surface of the inner cylinder and facing a surface on the outer cylinder side. A water faucet casing comprising: a partition wall having a continuous sealing groove; and a liquid sealing material injection hole perforated in a tube wall of the outer cylinder at a position communicating with the sealing groove. 2. A method for sealing a water passage formed by partitioning a space between an outer cylinder and an inner cylinder constituting a faucet casing by a partition wall protruding from an outer surface of the inner cylinder. ,
After the inner cylinder is inserted into the outer cylinder, at a position communicating with the seal groove provided in the partition wall of the inner cylinder, a liquid sealing material perforated in the pipe wall of the outer cylinder is inserted into the seal groove through the inlet. A method of sealing a water passage of a water faucet casing, comprising: injecting a liquid sealing material into the sealing member, and curing the liquid sealing material to seal the water passage.