JPH0953774A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint by which pipes can be connected to each other even if center dislocation correcting work of the pipes is not performed and airtightness of a connecting part can be secured. SOLUTION: A pipe joint is provided with a connecting part 5 composed of an elastic material 4 where pipes 2 and 3 are arranged on both sides of a movable body 1 formed in a freely bendable bellows shape so as to be fitted and connected to the outer periphery, and is constituted so that a metallic ring 7 having a folding-back part 6 proceeding in the fitting direction of the pipes 2 and 3 is embedded in the connecting part 5.

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 piping work 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, harmonized air leaks from pipes or pipes, or the connection between air conditioner equipment and pipes, and the leakage of dirty air discharged outdoors. Pipe joints are widely used to prevent this. A conventional pipe joint of this type will be described with reference to FIGS. 6 to 8.

As shown in the figure, when connecting two pipes, a pipe joint 102 having a flange at the center of the outer circumference is inserted into the end portion of one pipe 101 from one end, and the pipe joint 102 is fitted to the flange and attached. The other tube 103 is also fitted and connected to the other side of the joint 102 in the same manner. However, the construction of the housing equipment is complicated, and, for example, the mounting portion of the related equipment 104 and the wall holes 105 and 105a penetrating the pipe 101 are constructed before the plumbing work. Since the work is performed individually, it is often difficult to perform the portion through which the pipe 101 is passed through the single axis 106. When displacement of a related portion in the pipe occurs, it becomes impossible to connect the pipes 101 and 103 to each other. Therefore, in order to correct the misalignment of the pipe 101, alignment of related devices and the like and the wall hole 10
Adjustment work such as additional machining of Nos. 5 and 105a is required, and after the adjustment, the pipe joint 102 is fitted to the other pipe 103 and related devices. In addition, if a load is applied to the connection part of the fitted joint in the direction of disconnecting the pipes 101 and 103 due to other facility construction, the connected pipes 101 and 103 are prevented from coming off, and the airtightness of the connected parts is secured. By winding a tape 107 for the purpose of
It secured the 03's omission and airtightness.

[0004]

In such a conventional pipe joint 102, it is necessary to realign the cores of the pipes 101 and 103 and to prevent the connecting portions of the pipes 101 and 103 from coming off and to ensure airtightness.
Although the work of winding the pipe 107 is required, pipes of other equipment such as the ceiling ceiling where piping work is performed, air conditioning equipment, wiring of air conditioning equipment, other equipment (lighting, water supply / drainage pipe, electric wiring, etc.), or There are various obstacles such as beams and columns of buildings, and the work of realigning the cores of the pipes 101 and 103 in a narrow ceiling, etc., and preventing the connected pipes 101 and 103 from coming off and ensuring the airtightness of the connection part. There is a problem that the work of winding the tape 107 cannot be easily performed.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a pipe joint which can be connected without realigning the core of the pipe and which can secure the airtightness of the connecting portion.

A second object is to enable more reliable connection regardless of the roundness of the pipe to be connected.

A third object is to improve the connection workability of the pipe joint.

[0008]

In order to achieve the above-mentioned first object, the pipe joint of the present invention is constructed such that the first means is a bellows-like movable portion and both sides of the movable portion. The pipe is provided with a connecting portion made of an elastic material arranged so as to be fitted and connected to the outer periphery, and a metal ring having a folded portion extending in the fitting direction of the pipe is embedded in the connecting portion.

Further, in order to achieve the second object, the second
In this means, the folded portion of the metal ring is formed in a wavy shape, and a plurality of tooth portions are provided.

In order to achieve the third object, the third
The means has a structure in which the metal ring embedded in the connection portion is formed integrally with the movable portion.

[0011]

According to the present invention, by the structure of the above-mentioned first means, the movable portion of the pipe joint is bent and deformed in accordance with the misaligned state of the pipes to be connected, and then one of the folded metal rings is provided. By press-fitting the connection part to the pipe to fix the connection part to the pipe, and similarly press-fitting and fixing the connection part at the other end to the other pipe as well, it is possible to omit the work of realigning the core of the pipe, Moreover, the elastic action of the connection portion and the folded portion of the metal ring can prevent the tube from coming off, and the connection portion can be in close contact with the tube to ensure airtightness.

Further, according to the structure of the second means, since a plurality of tooth portions are formed in the folded portion, the elastic force of each tooth portion acts along the roundness of the pipe to be connected, and the connecting portion is connected. The part and the inner diameter of the pipe are in close contact, and a more reliable connection can be made.

Further, according to the structure of the third means, the movable portion can be piped by simply press-fitting one connecting portion into one pipe and then press-fitting the connecting portion at the other end into another pipe having a misalignment. It can be deformed according to the misaligned state of each other, and the work of adjusting the bending of the movable part can be omitted.

[0014]

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 figure, a connection made of an elastic material 4 such as rubber is fitted on both sides of a movable body 1 which is formed in a bellows shape and is bendable so that the inner diameters of the connected pipes 2 and 3 are fitted to the outer circumference. Part 5
And a part of the elastic material 4 in the vicinity of the movable body 1 is left, and the folded portion 6 is provided in the connection portion 5 in the fitting direction in which the tubes 2 and 3 are fitted.
And a metal ring 7 having a substantially U-shaped cross section and formed in an annular shape is embedded.

In the above structure, when connecting the tubes 2 and 3 via the movable body 1, the connecting portion 5 provided at one end of the movable body 1 is press-fitted into one of the tubes 2. At this time, since the folding direction of the folding portion 6 of the metal ring 7 embedded in the connecting portion 5 is coincident with each other, the connecting portion 5 is guided by the folding portion 6 and fitted into the pipe 2 in the smooth, Folded part 6 after mating
An elastic force acts on the pipe 2 in the pulling direction of the pipe 2 and the pipe 2 is fixed together with the compressed elastic member 4 so as not to slip out, and the elastic member 4 is closely attached to the inner circumference of the pipe 2 to ensure airtightness. .

Further, the other pipe 3 connected to the other end of the movable body 1 is also connected by the same action as when connecting the above-mentioned pipe 2.

When the cores of the pipes 2 and 3 connected to both sides of the movable body 1 are deviated, the movable body 1 is bent corresponding to the misalignment and the space between the movable body 1 and the connecting portion 5 is increased. Also in this case, by bending the elastic material 4, the pipes 2 and 3 can be connected in a state corresponding to the misalignment.

As described above, according to the pipe joint of the first embodiment of the present invention, even if the connecting pipes 2 and 3 are misaligned, the connecting portions 5 provided on both sides of the movable body 1 are connected to each other. A few
When it is fitted into the connection part 5, the metal ring 7 provided in the connection part 5 is inserted into the smooth by the action of the folded part 6, and after the connection, the pipes 2 and 3 are prevented from coming off, and the elastic material of the connection part 5 is prevented. 4 is closely attached to the inside of the tubes 2 and 3, and the movable body 1 is provided for the misalignment.
Also, since the elastic member 4 of the connection portion 5 bends freely to adjust the core misalignment, only the connection is performed without performing the alignment work of the pipes 2 and 3, and the connection portion of the pipes 2 and 3 is not touched. -It is possible to complete the work of connecting the pipes, which have both the airtightness of the connection part 5 and the prevention of the disconnection, without the need to wind the cable.

Next, a second embodiment will be described with reference to FIGS. 3 and 4. The second embodiment is different from the first embodiment in the metal ring provided in the connecting portion, 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 drawing, the folded portion 6A of the metal ring 7A provided in the connecting portion 5A arranged on both sides of the movable body 1 is formed in a wave shape, and the tooth portion 6a having a plurality of elastic forces is formed.
Is provided.

In the above structure, even when the tubes 2A and 3A connected by the movable body 1 have poor roundness, when the connecting portion 5A of the movable body 1 is fitted into the tubes 2A and 3A,
The folded portion 6A along the shape of the inner diameter of the tubes 2A and 3A
The elastic force of the plurality of tooth portions 6a formed on the
The elastic material 4 of the connecting portion 5A is closely attached to the inner diameters of the tubes 2A and 3A to be connected.

As described above, according to the pipe joint of the second embodiment of the present invention, the connecting portion 5A is fixed regardless of the roundness of the inner diameters of the pipes 2A and 3A to be connected, and the airtightness of the pipe connecting portion is improved. And the retaining effect can be made more reliable.

Next, a third embodiment will be described with reference to FIG. The third embodiment is different from the first embodiment in the movable part, 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 drawing, a metal ring 7B having a folded portion 6 embedded in a connection portion 5B is integrally formed on both sides of a bellows-shaped and flexible movable body 1A.

In the above-mentioned structure, the movable portion 1 is fitted with one of the connecting portions 5B being press-fitted into the one pipe 2 and the other connecting portion 5B being fitted together with the other pipe 3 having the misalignment.
A naturally bends and deforms to match the misalignment between the tubes 2 and 3, and the work of adjusting the bending of the movable portion 1A can be omitted.

As described above, according to the pipe joint of the third embodiment of the present invention, the connecting portion 5B is press-fitted into the pipes 2 and 3 without deforming the movable portion 1A according to the misalignment of the pipes 2 and 3. The connection work can be completed simply by connecting.

[0028]

As is apparent from the above description of the embodiments, according to the present invention, the movable portion formed in a bellows shape and bendable, and the pipes are fitted and connected to the outer periphery on both sides of the movable portion. Since a metal ring having a connecting portion made of an elastic material arranged in such a manner as described above and having a folded-back portion extending in the fitting direction of the pipe is embedded in the connecting portion, it is not necessary to realign the core of the pipe. A pipe joint that can be connected and that ensures the airtightness of the connection portion can be provided.

Further, since the folded portion of the metal ring is formed in a wave shape and a plurality of teeth are provided, reliable connection can be achieved even if the roundness of the pipe to be connected is poor.

Further, by forming the metal ring embedded in the connecting portion integrally with the movable portion, the work of adjusting the misalignment in the movable portion can be omitted, so that the workability of connecting the pipe joint can be improved. it can.

[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 perspective view showing a state where a pipe is connected to both ends of the pipe joint of the first embodiment. Partial broken perspective view

FIG. 2A is a partially cutaway perspective view of a connecting portion of the pipe joint of the first embodiment. FIG. 2B 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 of the present invention. FIG. 3 (b) is a perspective view showing a state in which the pipe is connected to both ends of the pipe joint of the second embodiment. Partial broken perspective view

FIG. 4 (a) is a partially broken perspective view of a connecting portion 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. 5 (a) is a partially broken perspective view of a connecting portion of the pipe joint of the third embodiment. FIG. 5 (b) is a perspective view showing a state where a pipe is connected to the pipe joint of the third embodiment.

FIG. 6A is a perspective view showing a state in which a pipe is connected to a conventional pipe joint, and FIG. 6B is a partially broken perspective view showing a state in which a pipe is connected from both of the pipe joints.

FIG. 7 is a schematic diagram showing a state where the related equipment and pipes are connected.

FIG. 8 is a perspective view showing a tape winding state of the pipe joint.

[Explanation of reference numerals] 1 movable body 1A movable body 2 tube 2A tube 3 tube 3A tube 4 elastic material 5 connecting part 5A connecting part 5B connecting part 6 folding part 6A folding part 7 metal ring 7A metal ring 7B metal ring

Claims (3)

[Claims] 1. A connection part comprising a movable part which is bellows-shaped and bendable, and a connection part made of an elastic material which is arranged on both sides of the movable part so that the pipe is fitted and connected to the outer periphery. A pipe joint formed by embedding a metal ring having a folded-back portion in the fitting direction toward the fitting direction of the pipe. 2. The folded portion of the metal ring is formed in a wavy shape,
The pipe joint according to claim 1, wherein a plurality of teeth are provided. 3. The pipe joint according to claim 1, wherein the metal ring embedded in the connection portion is formed integrally with the movable portion.