JP4191970B2 - Cap to prevent foreign matter from entering the connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is used for pipe connectors (hereinafter represented by “connectors”) such as metal adapters, resin connectors or headers for connecting pipes used mainly for water supply or hot water supply. It is related to the cap.
[0002]
[Prior art]
Conventionally, metal pipes have been used as pipes for water supply, hot water supply, or air conditioning equipment in buildings, but such pipes are concerned about water contamination and leakage due to rust and corrosion. Resin pipes tend to be used. And what was devised so that the adapter for connecting this pipe, the connector, and the header for distributing water and hot water can be connected with one touch is employed (Patent Document 1). Hereinafter, the present invention will be described with a connector as a representative, but the connector is also being switched from a metal one to a resin one to prevent grabbing and water leaking into the surface of the pipe inside the connector. An O-ring is built in.
[0003]
That is, the connector and the pipe are carried into the piping work site in the state of parts that are not connected to each other, and the pipe is connected to the connector while cutting the pipe to an appropriate length to perform the piping work. However, the piping work site is usually not in a favorable state as a work environment, dust and dust are scattered, and in some cases, this is floating in the air. Therefore, it goes without saying that these dusts and debris can easily enter, for example, the inside of the connector. If pipes are connected in a state where they are contained, it may cause water leakage. It will not be able to change quality or maintain sufficient flow.
[0004]
Therefore, it is necessary to take measures to prevent foreign matter such as dust and dirt from entering the pipe insertion port in the connector. As a simple method that can be generally considered, it is conceivable to seal the insertion port with a tape provided with an adhesive material, but it is also true that the adhesive material is easily removed. It can be considered that this may cause a negative effect on pipe connection and the like.
[0005]
On the other hand, as a problem on the pipe side, when connecting to the connector, a support sleeve is inserted into the tip of the pipe and then inserted into the connector, but the support sleeve is inserted into the pipe. There is a case where it is inserted into the connector with the illusion. As described above, when a support sleeve is not used, the strength in the radial direction of the pipe is weak, so that it is easily deformed, the grab ring is not sufficiently bitten, and the occurrence of water leakage is unavoidable.
[0006]
[Patent Document 1]
JP-A-5-106773 [0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above prior art, and prevents the entry of foreign matters such as dust and dirt into the connector and securely fits the support sleeve to the pipe. A cap is provided.
[0008]
[Means for Solving the Problems]
The gist of the present invention is that the cap for protecting the pipe insertion port of the connector includes an annular plate portion covering the front surface of the insertion port, a recessed portion toward the inside of the insertion port at the center thereof, and a periphery of the annular plate portion. A substantially cylindrical skirt portion that is formed and conforms to the outer shape of the pipe insertion port, and is formed by connecting the annular plate portion and the recess portion with an annular bulging portion that faces away from the insertion port. The bulging portion is a cap for preventing entry of foreign matter into the connector, characterized in that the bulging portion is sized to accommodate a flange portion formed at the tip of a support sleeve fitted into the pipe. It is usually made of synthetic resin, and the whole is usually obtained by vacuum forming.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The cap according to the present invention has a function of covering a pipe insertion port of the connector and a function of holding a support sleeve inserted into the pipe. In other words, the recess is placed in the connector into the pipe insertion port to prevent foreign material from entering, and the support sleeve flange is placed in the annular bulge to prevent the connector from being inserted into the pipe insertion port. One support sleeve is always associated, and it can be inserted into the end of the pipe as it is. For this reason, the mistake of inserting the pipe into the connector without inserting the support sleeve can be greatly reduced.
[0010]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
FIG. 1 is a front view of a foreign matter intrusion prevention cap 1 according to the present invention, and FIG. 2 is a half sectional view. The cap 1 is made of polypropylene, 2 is an annular plate portion that covers the front face of the pipe insertion port in the connector, 3 is a skirt portion formed around this, and 4 is an annular plate portion 2. It is the hollow part formed in the center of. And the annular plate part 2 and the hollow part 3 are connected by the annular bulging part 5 which goes to the opposite side to an insertion port.
[0011]
FIG. 3 is a half sectional view in which the support sleeve 10 is combined with the cap 1, and shows a state in which the flange 11 of the support sleeve 10 is housed in the annular bulging portion 5.
[0012]
FIG. 4 is a half sectional view showing the relationship between the elbow-type connector-20 and the cap 1 of the present invention. In the connector-20, the connector 20 is formed with two step portions 21 and 22 therein, and the step portion 21 on the deep side is provided at a position for determining the tip of the pipe to be inserted. On the other hand, an O-ring 23 and a grab ring 24 are fitted into the step portion 22 on the shallow side, and a claw portion 25 that bites into the surface of the pipe is formed inside the grab ring 24. An outer peripheral side of the grab ring 24 forms an inclined surface 26. A socket 27 is screwed around the connector 20 so that the inclined surface 28 formed on the inner peripheral side of the socket 27 and the inclined surface 26 of the grab ring 24 face each other. Provided. The connector 20 was made of polybutene resin in this example.
[0013]
Now, the support sleeve 10 is inserted into the socket 27 with the flange 11 of the support sleeve 10 in the annular bulging portion 5 of the cap 1 and the connector 20. The skirt part 3 of the cap 1 is fitted so as to cover it. In this case, the length of the support sleeve 10 is set such that the tip reaches the step portion 21.
[0014]
That is, as shown in FIG. 4, the cap 1 containing the support sleeve 10 covers the pipe insertion port in the connector 20 before use, and therefore, in the connector 20 Foreign matter does not enter during storage. When using the connector 20, the cap 1 is removed for the first time, the support sleeve 10 contained in the cap 1 is inserted into the tip of the pipe to be inserted, and the flange 11 of the support sleeve 10 is inserted. Since the pipe 30 is exposed at the tip of the pipe 30 and inserted, the situation of forgetting to insert the support sleeve 10 into the pipe 30 is extremely reduced.
[0015]
The support sleeve 10 is inserted into the pipe 30 to be connected so that the claw 25 of the grab ring 24 can easily bite into the surface of the pipe 30, and the flange 11 is caught on the tip of the pipe 30 to specify its position. Is.
[0016]
In terms of the relationship between the cap 1 and the support sleeve 10, the flange 11 is fitted into the annular bulging portion 5, and the surface of the recessed portion 3 comes into contact and is held from the inside. The support sleeve 10 can be easily taken out of the cap 1, and the cap 1 is brought to the tip of the pipe 30 while the support sleeve 10 is fitted, and the support sleeve 10 is moved to the support sleeve 10. It is also possible to insert it into the pipe 30. In this case, since the support sleeve 10 is not directly gripped by hand, it is more preferable.
[0017]
As described above, the foreign matter intrusion prevention cap of the present invention can be used not only for connectors, but also for other pipe connectors such as headers and faucet plugs. FIG. 5 shows a header 40 made of polybutene, and FIG. 6 is an exploded explanatory view thereof. These are constituted by the header members 40a, 40b,... And are assembled by inserting the protruding ports 42 of the respective headers into the respective insertion ports 41a. The caps 1 (and the support sleeves of the present invention) are inserted into the insertion ports 41a. -Support 10) can be employed, and the support sleeve 10 is also inserted into the projecting opening 42 as it is. Needless to say, the cap 1 (and the support sleeve 10) is applied to the pipe insertion opening 41b of each header member, and the support sleeve 10 is fitted into the tip of the pipe 30. 43 is a protective piece.
[0018]
【The invention's effect】
As described above, the use of the cap of the present invention can completely prevent foreign matter from entering the inside of the connector or the like, and the support sleeve can be inserted into the pipe by inserting the support sleeve into the cap. This makes it possible to eliminate forgetting to insert, not only to prevent the entry of foreign substances, but also to prevent the occurrence of water leakage, which is very convenient for pipe connection work.
[Brief description of the drawings]
FIG. 1 is a front view of a foreign matter intrusion prevention cap 1 of the present invention.
2 is a half sectional view of FIG. 1. FIG.
FIG. 3 is a half sectional view in which a support sleeve is combined with a cap.
FIG. 4 is a half sectional view showing the relationship between a connector and a cap.
FIG. 5 is a half sectional view showing the relationship between a header and a cap.
FIG. 6 is an exploded explanatory view of FIG. 5;
[Explanation of symbols]
1. Foreign matter intrusion prevention cap,
1a ... Pipe insertion port,
2. Annular plate part,
3 ... Skart part,
4. Depression,
5 ... An annular bulge,
10. Support sleeve,
11. Flange,
20 ... Connector-
21, 22... Connector—internal step,
23 O-ring,
24. Grabbling,
25 ... nails,
26 ... an inclined surface on the outer peripheral side of the grab ring,
27. Socket,
28. Inclined surface on the inner circumference side of the socket,
30 ... pipe,
31 ... Flange,
40 ... Header
40a, 40b, ... header-components,
41a, 41b.
42.
43. Protection piece.

Claims (3)

The cap that protects the pipe insertion port of the connector is formed around the annular plate portion covering the front surface of the insertion port, a recessed portion toward the inside of the insertion port at the center, and around the annular plate portion. An approximately cylindrical skirt portion that conforms to the outer shape, and an annular plate portion and a recess portion are connected by an annular bulging portion that faces away from the insertion port, and the annular bulging portion is connected to the pipe. A cap for preventing foreign matter from entering a connector, wherein the cap is sized to accommodate a flange portion formed at the tip of a support sleeve to be fitted. 2. The cap for preventing foreign matter from entering the connector according to claim 1, wherein the cap is made of a synthetic resin. 3. The cap for preventing foreign matter from entering the connector according to claim 2, wherein the cap is made of polypropylene.

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