JP3318160B2 - Pipe fittings - Google Patents

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 of an air conditioner or the like.

[0002]

2. Description of the Related Art In recent years, in piping work for air conditioners and the like installed on buildings, leakage of harmonized air or dirty air discharged to the outside from pipes and pipes or the connection between air conditioner equipment and pipes. In order to prevent this, pipe fittings are widely used. A conventional pipe joint of this type will be described with reference to FIGS.

[0003] As shown in the figure, in connecting two pipes, a pipe joint 102 having a flange provided at the center of the outer periphery at one end of one pipe 101 is inserted from one side and fitted to the flange, and attached. The other pipe 103 is similarly fitted and connected to the other side of the joint 102. However, the construction of the housing equipment is complicated. For example, the construction of the installation portion of the related equipment 104 and the wall holes 105 and 105a penetrating the pipe 101 are performed before the plumbing work, and the parts related to the plumbing performed earlier are performed. Since the construction is performed individually, it is often difficult to pass the pipe 101 through one axis 106. If the displacement of the related parts in the piping occurs, the connection between the pipes 101 and 103 becomes impossible.
Adjustment work such as additional processing of 5, 105a is required, and after the adjustment, the pipe joint 102 is fitted with the other pipe 103 or related equipment. In addition, when a load is applied to the connection portion of the fitted joint in the pull-out direction of the pipes 101 and 103 due to other facility work, it is possible to prevent the connected pipes 101 and 103 from coming off and to ensure the airtightness of the connected portion. For the purpose of winding, the tape 107 is wound to connect the tubes 101, 1
03 and airtightness were secured.

[0004]

In such a conventional pipe joint 102, the pipes 101 and 103 are re-centered, and the connecting portions of the pipes 101 and 103 are prevented from coming off and airtightness is secured.
Although it is necessary to wind the pump 107, the space under the ceiling where the plumbing work is performed, such as pipes of other equipment, air conditioning equipment, wiring of air conditioning equipment, other equipment (lighting, plumbing pipe, electric wiring, etc.), or There are various obstacles such as beams and pillars of the building, and work to realign the pipes 101 and 103 in the narrow space behind the ceiling, to prevent the connected pipes 101 and 103 from coming off and to secure the airtightness of the connection parts. There is a problem that the work of winding the loop 107 cannot be easily performed.

An object of the present invention is to solve the above-mentioned problems, and it is a first object of the present invention to provide a pipe joint which can be connected without realignment work of the pipe and which can secure the airtightness of the connection part.

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 first object, a pipe joint according to the present invention comprises a bellows-shaped movable portion and a movable portion formed on both sides of the movable portion. and a connecting portion the tube made of an elastic material is arranged so as to be fitted and connected to the outer periphery, it has suited the fitting direction of the tube to the connection portion,
The elastic material brings the elastic material into close contact with the inner periphery of the tube.
Configuration to that embedded metal ring having a that folded portion.

Further, in order to achieve the second object, the second
Means has a configuration in which the folded portion of the metal ring is formed in a wave shape and a plurality of teeth are provided.

In order to achieve the third object, a third
Means has a structure in which a metal ring buried in the connection part is formed integrally with the movable part.

[0011]

According to the first aspect of the present invention, the movable part of the pipe joint is bent and deformed in accordance with the state of misalignment between the pipes to be connected, and then has one folded metal ring. By press-fitting the connection part into the pipe and fixing the connection part to the pipe, and press-fitting and fixing the connection part at the other end to other pipes as well, it is possible to eliminate the work of re-centering the pipe, In addition, the connection portion and the folded-back portion of the metal ring can prevent the tube from coming off by the elastic action, and the connection portion can adhere to the tube to ensure airtightness.

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

According to the configuration of the third means, after the one connecting portion is press-fitted into one tube, the movable portion is simply press-fitted into the other tube having a misalignment, and the movable portion is connected to the other tube. It is deformed in accordance with the state of misalignment between the members, 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, on both sides of a movable body 1 which is formed in a bellows shape and is freely bendable, a connection made of an elastic material 4 such as rubber in which inner diameters of pipes 2 and 3 are fitted to the outer periphery. Part 5
And a part of the elastic member 4 near the movable body 1 is left, and a folded portion 6 is provided in the connecting 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 section and an annular shape is embedded.

In the above configuration, when the tubes 2 and 3 are connected 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 folded direction of the folded portion 6 of the metal ring 7 embedded in the connecting portion 5 matches, the connecting portion 5 is guided by the folded portion 6 and is smoothly fitted into the pipe 2. After fitting, folded part 6
An elastic force acting in the direction in which the tube 2 comes off acts on the tube 2 so that the tube 2 is fixed together with the compressed elastic material 4 so that the tube 2 does not come off, and the elastic material 4 adheres tightly to the inner periphery of the tube 2 to ensure airtightness. .

Further, the other pipe 3 connected to the other end of the movable body 1 is connected by the same operation as the connection of the pipe 2 described above.

If the cores of the tubes 2 and 3 connected to both sides of the movable body 1 are out of alignment, the movable body 1 is bent in accordance with the misalignment, and In this case, the connection of the pipes 2 and 3 becomes possible in a state corresponding to the misalignment by bending the elastic member 4.

As described above, according to the pipe joint of the first embodiment of the present invention, even if the pipes 2 and 3 to be connected are misaligned, the connecting portions 5 provided on both sides of the movable body 1 can be connected. Two, three
When the connection is made, the metal ring 7 provided in the connecting portion 5 is smoothly inserted by the action of the folded portion 6, and after the connection, the tubes 2 and 3 are prevented from coming off. 4 is tightly fitted in the tubes 2 and 3, and the movable body 1
And the elastic member 4 of the connecting portion 5 allows it to bend freely and adjust the misalignment. Therefore, the work of centering the tubes 2 and 3 is not required, and the connecting portions of the tubes 2 and 3 are not connected. It is not necessary to wind the loop, and the connection work of the pipes which secures the airtightness of the connection portion 5 and prevents the connection portion from falling off can be completed.

Next, a second embodiment will be described with reference to FIGS. The second embodiment differs from the first embodiment in the metal ring provided at the connection portion. The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, a folded portion 6A of a metal ring 7A provided in a connecting portion 5A provided on both sides of the movable body 1 is formed in a wave shape, and a plurality of tooth portions 6a having elasticity are formed.
Is provided.

In the above configuration, even when the roundness of the tubes 2A and 3A connected by the movable body 1 is poor, when the connecting portion 5A of the movable body 1 is fitted into the tubes 2A and 3A,
Folded portion 6A so as to conform to the shape of the inner diameter of pipes 2A and 3A
The elastic force of the plurality of tooth portions 6a formed on the
The elastic member 4 of the connecting portion 5A is connected in close contact with the inner diameters of the tubes 2A and 3A.

As described above, according to the pipe joint of the second embodiment of the present invention, the connection portion 5A is fixed irrespective of the roundness of the inner diameters of the pipes 2A and 3A to be connected, and the airtightness of the pipe connection portion is achieved. And the retaining effect can be further ensured.

Next, a third embodiment will be described with reference to FIG. Note that the third embodiment differs from the first embodiment in the movable parts, and the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted.

As shown in the figure, a metal ring 7B having a folded part 6 embedded in a connecting part 5B is integrally formed on both sides of a movable body 1A which is bellows-shaped and can be bent.

In the above configuration, one connecting portion 5B is press-fitted into one tube 2 and the other connecting portion 5B is press-fitted to the other tube 3 having a misalignment, so that the movable portion 1
A naturally bends and deforms so as 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 tubes 2, 3 without deforming the movable portion 1A in accordance with the misalignment of the tubes 2, 3. Just by connecting, the connection work can be completed.

[0028]

As is apparent from the above description of the embodiment, according to the present invention, a movable portion formed in a bellows-like and freely bendable, and pipes are fitted and connected to the outer periphery on both sides of the movable portion. in a connection portion made of an elastic material is arranged as, not suited to the fitting direction of the pipe to the connection portion, wherein the elastic force thereof
Since a metal ring having a folded portion for bringing an elastic material into close contact with the inner periphery of the pipe is embedded, it is possible to provide a pipe joint which can be connected without performing the work of realigning the pipe and secure the airtightness of the connection part. .

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

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

[Brief description of the drawings]

FIG. 1 (a) is a perspective view showing a state where a pipe is connected to a pipe joint according to a first embodiment of the present invention; and (b) is a view showing a state where pipes are connected to both ends of the pipe joint according to the first embodiment. Partly broken perspective view

FIG. 2A is a partially broken perspective view of a connection part 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. 3A 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. 3B is a view showing a state in which pipes are connected to both ends of the pipe joint of the second embodiment. Partly broken perspective view

FIG. 4A is a partially broken perspective view of a connection portion of the pipe joint of the second embodiment. FIG. 4B 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 connection portion of the pipe joint of the third embodiment. (B) is a perspective view showing a state where a pipe is connected to the pipe joint of the third embodiment.

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

FIG. 7 is a schematic diagram showing a state where the related equipment and a pipe are piped.

FIG. 8 is a perspective view showing the pipe joint in a tape wound state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable body 1A Movable body 2 tube 2A tube 3 tube 3A tube 4 elastic material 5 connection part 5A connection part 5B connection part 6 folded part 6A folded part 7 metal ring 7A metal ring 7B metal ring

Claims (3)

(57) [Claims] A movable portion formed in a bellows-like shape so as to be freely bent; and a connecting portion made of an elastic material disposed on both sides of the movable portion so as to be fitted and connected to an outer periphery of the movable portion. portion to have unsuitable in the fitting direction of the tube, the bullet by its elastic force
A pipe joint formed by burying a metal ring having a folded portion for bringing a conductive material into close contact with the inner periphery of the pipe. 2. A folded portion of the metal ring is formed in a wave shape.
The pipe joint according to claim 1, wherein a plurality of teeth are provided. 3. The pipe joint according to claim 1, wherein a metal ring embedded in the connecting portion is formed integrally with the movable portion.