JPH0814450A - Pipe joint - Google Patents

Abstract

PURPOSE:To provide an O annular pipe joint displaying an effect of both preventing a leak of air or the like from a connecting part of the fellow pipes and preventing coming off of the pipe from the connecting part. CONSTITUTION:A device has a metal ring 6 formed into an integral structure by connecting an outer cylinder 4, set to the fitting dimension to an external diameter of one pipe 1 connected, to an inner cylinder 5, set to the fitting dimension to an internal diameter of the pipe 1 connected by providing a fold back part 5a in both ends, by a connecting part 6a in order to connect the two pipes of equal diameter. In this constitution, the pipe 1 is connected from one side of an 0 ring 3 formed of elastic material 6b or the pipe 2 is connected to the other side, so as to fix the respective pipes prevented from coming off by an elastic effect of the respective fold back part 5a of the metal ring 6 and also so as to closely attach a material part of the 0 ring 3, having elasticity, to the pipes 1, 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for plumbing such as air conditioning equipment.

[0002]

2. Description of the Related Art In recent years, in the plumbing work of air conditioners installed in buildings, leaks of conditioned air or dirty air discharged to the outside from the connection between pipes or the connection between air conditioner equipment and pipes. Pipe joints are widely used to prevent this. A conventional pipe joint of this type will be described with reference to FIGS.

As shown in the figure, when connecting two pipes, a connection connecting pipe 102 having a flange at the center of the outer periphery of one pipe 101 is inserted from one end and fitted to the flange. The other pipe 10 is attached to the other side of the connecting pipe 102.
Similarly, 3 is fitted and connected. However, if a load is applied in the direction of disconnection of the pipe of the connection part due to another piping work that affects the connection part or work such as position adjustment of the air conditioning equipment,
Since there is a concern that the connected pipe may come off, a tape 104 for fixing the connecting portion is wrapped around the pipe so as to prevent the pipe from coming off due to the holding force of the tape 104. Further, regarding the airtightness, since the work of winding the tape 104 is not uniform, there is a concern that conditioned air or dirty air may leak.

[0004]

In such a conventional pipe joint, after connecting the pipes 101 and 103, a rubber seal is wound around the connecting portion to secure airtightness, or the pipes 101 and 10 are connected.
It is necessary to wind the tape 104 to fix the pipes 101 and 103 in order to prevent the pipe 3 from coming off.
Piping work such as the ceiling above the ceiling is the pipe of other equipment, air conditioning equipment, wiring of air conditioning equipment, and other equipment (lighting, water supply and drainage pipes,
There are various obstacles such as electrical wiring, etc., or beams and columns of buildings, and connected pipes 10 in narrow ceilings, etc.
Tape 104 for rubber seals and slip-out prevention to 1, 103
There was a problem that the winding work of was not easy.

The present invention solves the above problems by eliminating the work of wrapping a connecting portion of a pipe having the same diameter with a tape for preventing the connecting portion of the pipe from coming off, and connecting the pipes only by inserting them. A first object of the present invention is to provide a pipe joint capable of ensuring the airtightness and the effect of preventing the pipe from coming off.

The second purpose is to make the connection of the pipes more reliable.

[0007]

In order to achieve the first object of the pipe joint of the present invention, the first means is that the outer cylinder and the inner cylinder are connected to each other through the connecting portions, and both end portions of the inner cylinder are connected. Is provided with a metal ring provided with a folded-back portion toward which the elastic force acts toward the outer cylinder side, and an O ring formed by an elastic material surrounding the inner cylinder of the metal ring. The pipe is connected and fixed by elastic force.

In order to achieve the second object,
The second means has a configuration in which a corrugated portion is formed at the folded portion of the first means.

[0009]

According to the present invention, by the construction of the above-mentioned first means, a pipe is inserted into both ends of an O-ring having a metal ring in which an outer cylinder and an inner cylinder having folded portions at both ends are integrated, Due to the elastic effect of the folded part of the inner ring of the metal ring, the tube can be prevented from coming off,
The O-ring elastic material is in close contact with the pipe to ensure airtightness, and the pipe can be formed by fixing it.

Further, by the constitution of the second means, more reliable connection can be secured regardless of the roundness of the outer diameter of the pipe connected by the metal ring folded back in a corrugated shape.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the drawing, an O-ring 3 capable of connecting the pipe 1 and the pipe 2 has an outer cylinder 4 having an inner diameter of an interference fit with the outer diameters of the pipe 1 and the pipe 2 so that the O-rings 3 can be connected to their respective end faces.
And the outer peripheral portion of the inner cylinder 5 which is provided with folded-back portions 5a each having a substantially U-shaped cross section and having elastic force acting toward the outer cylinder 4 at both ends and having a fitting dimension with the inner diameters of the pipes 1 and 2. The substantially central portion of the outer cylinder 4 and the substantially central portion of the inner peripheral portion of the outer cylinder 4,
A rubber material 6b having a metal ring 6 integrally formed via a
A folded portion of the outer cylinder 4 and the inner cylinder 5 which is made of an elastic material such as 5a is compressed by sandwiching the pipe 1 and is fixed by the elastic effect so that the connected pipe 1 and the pipe 2 do not come off. Also, due to this connection, the rubber material 6b of the O ring 3 is provided between the pipe 1 and the pipe 2. The elastic material such as is adhered and the airtightness is secured.

As described above, according to the pipe joint of the first embodiment of the present invention, the work of wrapping the tape in the narrow ceiling is abolished, and the pipe is connected in the pipe connection work with the pipe and the air conditioning equipment. Only by doing so, it is possible to complete the work of connecting the pipes, which has both the airtightness of the connection portion and the prevention of disconnection.

Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in the metal ring provided in the O-ring, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the folded portion 5b inside the O-ring 3A is provided with a corrugated metal ring 6A.

With the above structure, the connecting pipe 1 and pipe 2 are connected.
The corrugated folded portion 5b of the O-ring 3A ensures the pipe 1 and the pipe 2 by the elastic force of each corrugated portion along the inner peripheral surface of the pipe 1 and the pipe 2 to be connected, regardless of the circularity of the inner diameter of the pipe. It will be fixed to.

As described above, according to the pipe joint of the second embodiment of the present invention, the connecting portion is fixed regardless of the roundness of the outer diameters of the pipe 1 and the pipe 2 to be connected, and the pipe connecting portion is hermetically sealed. It is possible to make the effect of preventing slipping out more reliable.

[0018]

As is apparent from the above description of the embodiments, according to the present invention, a connection joint for forming an O-ring made of an elastic material is formed, and a folding portion for fixing a pipe to the O-ring is provided. Since it has a metal ring,
It is not necessary to wrap a special rubber seal to secure the airtightness of the pipe connection, and also eliminate the tape wrapping work to prevent the pipe from coming off after connecting the pipe, thus ensuring the airtightness of the connection. A pipe joint that can secure and prevent the pipe from coming off can be provided.

Further, since the folded portion of the metal ring is formed in a wave shape, the pipe can be securely fixed regardless of the roundness of the pipe to be connected.

[Brief description of drawings]

FIG. 1A is a perspective view showing a state where a pipe is connected to a pipe joint of a first embodiment of the present invention. FIG. 1B is a state where a pipe is connected from both ends of the pipe joint of the first embodiment. Partially broken perspective view

FIG. 2 (a) is a partially broken perspective view of an O-ring of the pipe joint of the first embodiment. FIG. 2 (b) is a partially broken perspective view of a metal ring of the pipe joint of the first embodiment.

FIG. 3 (a) is a perspective view showing a state in which a pipe is connected to the pipe joint of the second embodiment. FIG. 3 (b) is a part showing a state in which the pipe is connected from both ends of the pipe joint of the second embodiment. Broken perspective view

FIG. 4 (a) is a partially broken perspective view of an O-ring of the pipe joint of the second embodiment. FIG. 4 (b) is a partially broken perspective view of a metal ring of the pipe joint of the second embodiment.

FIG. 5A is a perspective view showing a state where a pipe is connected to a conventional pipe joint, and FIG. 5B is a partially broken perspective view showing a state where the pipe is connected from both of the pipe joints.

FIG. 6 is a perspective view showing a tape winding state of the pipe joint.

[Explanation of symbols]

 1 tube 2 tube 3 O ring 3A O ring 4 outer cylinder 5 inner cylinder 5a folding part 5b folding part 6 metal ring 6A metal ring 6a coupling part 6b elastic material

Claims (2)

[Claims] 1. A metal ring in which an outer cylinder and an inner cylinder are connected to each other through a connecting portion, and a folded portion on both ends of which the elastic force acts toward the outer cylinder, and an inner cylinder of the metal ring. A pipe joint having an O-ring formed of an elastic material surrounding the above, and connecting and fixing the pipe to both ends of the O-ring by the elastic force of the inner cylinder. 2. The pipe joint according to claim 1, wherein a corrugated portion is formed on a folded portion provided on the metal ring.