JPH09159084A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect pipes together airtightly and to separate the pipes from each other after piping by arranging a connecting pipe part, by which both connecting port, parts are connected together in a bent condition including a certain linear condition, and a seal member around the axis line on the inside face of each connecting port part. SOLUTION: Each of connecting port parts 3 positioned in both end parts of a pipe joint 1 is provided with an inner circumferential face with the inside diameter slightly larger than the outside diameter of a pipe to be connected. The pipe connecting port parts 3 are connected to each other by means of a connecting pipe 7 whose inside diameter is approximately equal to the inside diameter of the pipe, and in boundary parts between axis line direction both end parts of the connecting pipe 7 and the respective connecting port parts 3, stepped parts 8 are arranged. On the inner circumferential face on the stepped part 8 side, a recess part 9 is formed over the whole of periphery of the axis line, and a seal member 11 is installed in the recess part 9. The seal member 11 is constructed by integrally molding a ring type part 11a to be inserted into the recess part, 9 and a seal piece 11b inclined toward the center side and to the connecting pipe 7 side on the inner circumferential face of the ring type part 11a by synthetic rubber and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting pipes to each other, and more particularly, to a pipe joint which has an extremely low internal pressure and requires removal after cleaning for cleaning. Regarding pipe fittings.

[0002]

As a hose (pipe) used for draining a drain generated in an air conditioner, a bendable bellows-shaped one is used. In the bellows-shaped hose, dust and the like contained in the drain are accumulated in the concave portion of the inner surface of the hose, so that the hose must be occasionally cleaned even after the piping. In particular, dust and the like are likely to be accumulated in the bent portion, and there is a risk that the drain may not be drained due to clogging.

However, when connecting such bellows-shaped hoses to each other, a joint pipe having an outer diameter substantially equal to the inner diameter of the hose or an inner diameter substantially equal to the outer diameter of the hose with respect to the ends of the hose. The pipe joints of (1) and (2) were fitted and adhered to each end of the hose, but in this case, the hose could not be removed after piping and the inside could not be cleaned.

Further, since this type of hose is often installed in a narrow space such as a ceiling or a wall, an adhesive must be applied to each end of the hose in the narrow space. The adhesive application work was troublesome and the workability was extremely poor. If the adhesive is applied unevenly or the application amount is small, it is not possible to connect the hose and the joint pipe in an airtight manner, and there is a risk that the drain will leak from the connection point.

The present invention has been invented in order to solve the above-mentioned conventional drawbacks, and its object is to connect pipes with a certain degree of airtightness to effectively prevent water leakage at the connection points. It is to provide a pipe joint that can be prevented.

Another object of the present invention is to provide a pipe joint which can separate and clean the pipes even after the pipes and can prevent clogging.

[0007]

For this reason, the first aspect of the present invention is to provide at least two connecting ports each having an inner diameter substantially equal to an outer diameter of a pipe to be connected in a bent state including a constant linear state. A pipe joint is formed by connecting the connecting pipe portions and attaching a seal member provided on the inner surface of each connection opening portion around the axis. Then, the connecting port of the pipe joint is inserted into the end of the pipe to be connected, and the elastically deformable seal member is pressed against the outer peripheral surface of the pipe so that the pipes can be detached and connected in an airtight state.

According to a second aspect of the present invention, at least two connecting port portions each having an inner diameter substantially equal to an outer diameter of a pipe to be connected are connected by elastically deformable and bendable elastic connecting pipe portions. A seal member is provided on the inner surface of each connection port portion around the axis to form a pipe joint. A seal member that is elastically deformed by inserting the connection port of the pipe joint into the end of the pipe to be connected while bending the elastic connecting pipe according to the arrangement of the pipes is pressed against the outer peripheral surface of the pipe. By doing so, the tubes can be removed from each other and connected in an airtight state.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

Embodiment of Claim 1 FIG. 1 is a central longitudinal sectional view of a pipe joint.

FIG. 2 is a partially cutaway perspective view of the pipe joint.

The pipe joint 1 is made of a synthetic resin such as vinyl chloride resin, and the connection ports 3 located at both ends thereof have an inner peripheral surface having an inner diameter slightly larger than the outer diameter of the pipe 5 to be connected. . The pipe connection ports 3 are connected by the connection pipes 7 having an inner diameter substantially equal to the inner diameter of the pipes 5, and stepped portions 8 are provided at the boundaries between the respective axial ends of the connection pipes 7 and the respective connection ports 3. Has been.

Recesses 9 are formed on the inner peripheral surface of each connection port 3 on the side of the step portion 8 around the entire axis, and a seal member 11 is attached to each recess 9. Each seal member 11 includes a ring-shaped portion 11a that is fitted into the recess 9,
The inner peripheral surface of the ring-shaped portion 11a is made of synthetic rubber, and the sealing piece 11b is inclined toward the center side and the connecting pipe 7 side.
It is made of elastomer resin and is integrally formed.

As a method of attaching the seal member 11 to the recess 9, a ring-shaped portion 11a of the seal member 11 is inserted into the recess 9 and the elastic force of the ring-shaped portion 11a is maintained to maintain the inserted state. When the seal member 11 is made of an elastomer resin, the seal member 11 may be integrally molded in the recess 9 of the connection port 3 with the elastomer resin and then fixed by fusion.
When the seal member 11 is integrally molded with an elastomer resin, a plurality of holes 3a are formed in the connection port portion 3 of the recess 9 in advance at equal intervals around the axis as shown in FIG. By injecting the elastomer resin into the inside of the seal member 11 and integrally molding the seal member 11, by filling a part of the elastomer resin in the hole 3a, the fixing strength of the seal member 11 to the connection port portion 3 can be increased. Further, it is desirable that the seal member 11 is attached to the inner peripheral surface of the connection port 3 at a position close to the step 8.

Next, the connecting operation of the pipes 5 by the pipe joint 1 will be described.

FIG. 4 is a central longitudinal sectional view showing a connected state of the pipe 5 by the pipe joint 1.

When the connecting port 3 of the pipe joint 1 is inserted into one end of the pipe 5 to be connected, the seal piece 11b of the seal member 11 is elastically deformed in the direction of expanding the diameter of the pipe 5.
The outer peripheral surface of the pipe 5 is slidably contacted, and when the end of the pipe 5 hits the stepped portion 8 of the connection port portion 3, the elastic force thereof presses the outer peripheral surface of the pipe 5 to connect the outer peripheral surface of the pipe 5. The inner peripheral surface of the mouth portion 3 is made airtight.

When the end portion of the other pipe 5 is inserted into the other connection port portion 3 of the pipe joint 1 described above until it abuts the recess 9, the seal piece 11 of the seal member 11 is inserted.
Similarly to the above, b is pressed against the outer peripheral surface of the end portion of the tube 5 by its elastic force to be airtight.

In the above connected state, the seal pieces 11b of the respective seal members 11 are inclined in the inserting direction with respect to the respective pipes 5 and are in pressure contact with the step portion 8 side, so that the drain or the like flowing in the pipes 5 and the pipe joint 1 is formed. It is possible to prevent the fluid of No. 2 from flowing out and leaking to the opening side of the connection port portion 3 by the seal piece 11b that is brought into pressure contact with the outer peripheral surface of the end portion of the pipe 5 when the fluid enters.

The seal member 11 in each connection port 3
When the mounting position is set to the step portion 8 side, the amount of fluid that enters between the inner peripheral surface of each connection opening portion 3 and the outer peripheral surface of the end portion of the connection opening portion 3 can be reduced. It is possible to prevent the seal member 11 from being deteriorated by the fluid and keep the both members in an airtight state for a long period of time.

Further, each pipe 5 and the pipe joint 1 are provided with a seal piece 11b.
Since the connected state is maintained only by the elastic force of, the dust inside the pipe joint 1 and the pipe 5 can be removed by removing the pipe 5 and the like.

Embodiment of Claim 2 FIG. 5 is a central longitudinal sectional view of a pipe joint.

The pipe joint 51 has a structure in which the connection port portions 53 are connected to each other by an elastic connection pipe 55.

Each connection port 53 is made of a synthetic resin such as vinyl chloride, is formed in a substantially cylindrical shape having an inner diameter slightly larger than the outer diameter of the pipe 57 to be connected, and has a pipe on the inner peripheral surface of the end on the non-connection side. Stepped portions 59 each having an inner diameter substantially equal to the inner diameter of 57 are integrally formed. A cylindrical fixing portion 61 is integrally formed on the end surface of each step portion 59.

A concave portion 63 is formed on the inner peripheral surface of each connection port portion 53 on the step portion 59 side around the entire axis, and the concave portion 6 is formed.
A seal member 65 made of elastically deformable synthetic rubber or elastomer resin is attached to the unit 3. The seal member 65 is the same as the seal member 11 in the first embodiment, and has a ring-shaped portion 65 of the seal member 65 formed in advance.
The a may be inserted into the recess 63 and fixed by its elastic force, or the seal member 65 may be integrally molded in the recess 63 with an elastomer resin.

An elastic connecting pipe 55 is attached to the fixed portion 61 of each connection port portion 53. The elastic connecting pipe 55 is made of synthetic rubber and elastomer resin, and the elastic connecting pipe 55 formed in a pipe shape in advance is inserted and adhered to the fixing portion 61, or the elastic connecting pipe 55 is made of elastomer resin with respect to the fixing portion 61. It may be integrally molded. When the elastic connecting tube 55 formed in the shape of a pipe in advance is inserted and bonded to the fixing portion 61, as shown in FIG. 6, a plurality of protrusions 61 are formed on the outer peripheral surface of each fixing portion 61.
It is also possible to form a around the entire axis and to prevent the protrusion 61 a from biting into the inner peripheral surface of the elastic connection pipe 55 when the elastic connection pipe 55 is inserted into the fixed portion 61. or,
When the elastic connecting pipe 55 is integrally formed with each fixing portion 61 by the elastomer resin, a plurality of holes 61b are provided in each fixing portion 61 at equal intervals around the axis as shown in FIG. When the elastic connection pipe 55 is integrally molded with the fixing portion 61 by the elastomer resin, a part of the elastomer resin may be filled in the hole 61b to enhance the fixing strength of both.

The pipe joint 51 has the following actions in addition to the same actions as the pipe joint 1 in the first embodiment.

That is, when the axes of the pipes 57 to be connected do not match, or when the pipes 57 are separated from each other, as shown in FIG. The pipes 57 can be connected to each other by elastically deforming the elastic connection pipe 55. Further, when the axial crossing angle or the separation width between the pipes 57 is large, a plurality of pipe joints 51 are used as shown in FIG. 9, and the elastic connecting pipes 55 in the respective pipe joints 51 are curved with a small curvature. The spacer tube 67 may be used for connection.

In each of the above embodiments, the pipe joint 1
Although 51 is formed in a straight state, the connection port portions 3 and 53 are formed by the connecting pipe 7 or the elastic connecting pipe 55 which is curved in a predetermined curvature in advance.
It is also possible to provide the connection ports 5 and 53 at the end of the T-shaped or cruciform connecting pipe 7 or the elastic connecting pipe 55 in which the pipe joints 1 and 51 connecting to each other or the inside communicate with each other.

[0030]

Therefore, according to the present invention, the pipes can be connected to each other with a certain degree of airtightness, and the water leakage at the connection point can be effectively prevented. Further, according to the present invention, the pipes can be separated from each other and cleaned even after the pipes are cleaned, and clogging can be prevented.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a pipe joint.

FIG. 2 is a partially cutaway perspective view of a pipe joint.

FIG. 3 is a partially cutaway perspective view showing another example of mounting the seal member.

FIG. 4 is a central longitudinal sectional view showing a connected state of the pipe 5 by the pipe joint 1.

FIG. 5 is a central longitudinal sectional view of the pipe joint.

FIG. 6 is a partially cutaway perspective view showing an attachment example of an elastic connecting pipe.

FIG. 7 is a partially cutaway perspective view showing an attachment example of an elastic connecting pipe.

FIG. 8 is a vertical cross-sectional view showing a connected state of tubes.

FIG. 9 is a vertical cross-sectional view showing a connected state of tubes.

[Explanation of symbols]

 1 Pipe Joint 3 Connection Port 5 Pipe 7 Connection Pipe 9 Recess 11 Seal Member 51 Pipe Joint 53 Connection Port 55 Elastic Connection Pipe 65 Seal Member

Claims (6)

[Claims] 1. A connection pipe part for connecting at least two connection ports each having an inner diameter substantially corresponding to an outer diameter of a pipe to be connected, and connecting the connection ports in a bent state including a constant linear state. A pipe joint comprising a seal member provided around the axis on the inner surface of each connection port. 2. An at least two connection port portion having an inner diameter substantially corresponding to an outer diameter of a pipe to be connected, and an elastic connection pipe portion for elastically deforming the connection port portion and connecting the bendable portions. A pipe joint comprising a seal member provided around the axis on the inner surface of each connection port. 3. The seal member according to claim 1 or 2, wherein the seal member projects toward the center side and the connecting pipe portion side with respect to the recess formed in the inner peripheral surface of each connection opening portion around the axis line. Pipe fittings that are inserted and mounted as shown. 4. The seal member according to claim 1 or 2, wherein the seal member is made of an elastomer resin on the center side and the connecting pipe portion side with respect to the recess formed in the inner peripheral surface of each connection opening portion around the axis line. Pipe joint that is integrally molded so as to project toward. 5. A pipe joint according to claim 2, wherein the elastic connecting pipe is formed in advance into a cylindrical shape by an elastic member, and is fitted and fixed to each connection port. 6. The pipe joint according to claim 2, wherein the elastic connecting pipes are integrally molded with the elastomer resin into the respective connection ports.