JP2002005382A - Pipe coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing cost by using pipe couplings of the same structure. SOLUTION: A mounting part 21 is formed at a lower end part of an outer peripheral surface of a pipe coupling main body 1. A fitting hole 23 is formed at a lower end part of a fluid flow passage 6 of the pipe coupling main body 1. A mounting hole 32 mounted with the mounting part 21 of the pipe coupling main body 1 thereon and a flange 33 projected into the mounting hole 32 and abutted on an end face of the pipe coupling main body 1 are formed at an opening part of a fluid flow passage 8 of a relay member 3. A fixing member 4 has a fitting part 34 fitted into the fitting hole 23 of the pipe coupling main body 1, a large diameter part 35 having a diameter larger than that of the fitting part 34 and fitted into an inner peripheral surface of the flange 33 of a relay member 3 and a flange 36 abutted on a lower surface of the flange 33 of the relay member 3. The fitting part 34 of the fixing member 4 has a shape to forcibly fit into the fitting hole 23 of the pipe coupling main body 1 and a plurality of pawl-shaped projections 37 bitten into an inner peripheral surface of the fitting hole 23 of the pipe coupling main body 1 are formed on an outer peripheral surface of the fitting part 34. The relay member 3 fixing the pipe coupling main body 1 by the fixing member 4 is fixed to a body 5 with a screw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint device for directly or indirectly attaching a pipe joint made of synthetic resin to a pipe opening of a fluid device.

[0002]

2. Description of the Related Art Conventionally, as a structure for attaching a pipe joint made of a synthetic resin to a piping port of a fluid device, a structure in which a male thread portion of the pipe joint is screwed into a female thread portion of the fluid device, and the other end of the pipe joint is connected to a fluid device. Press-fitting into the mounting hole of the fitting, a structure in which the flange part integral with the fitting is fixed to the fluid equipment with screws, the other end of the fitting is pressed into the mounting groove of the fluid equipment and the claw on the outer peripheral surface of the fitting is A structure in which the inner peripheral surface of the mounting groove is bitten is used.

Further, as disclosed in Japanese Utility Model Application Laid-Open No. 6-80096, the locking arm of the press plate is engaged with the back surface of the fluid device, and the pipe joint is tightened by the press plate to be attached to the fluid device. As disclosed in JP-A-9-49578, a fitting is inserted into an output opening of a fluid device, a fitting is attached to an insertion groove of the fluid device, and a fitting portion of the fitting is locked by the fitting of the fitting. A structure for engaging the groove is known.

Further, Utility Model Registration Publication No. 253030
A structure in which a pipe joint is inserted into an output port of a fluid device, and a locking portion of an elastic clip attached to a mounting groove of the fluid device is locked in a locking groove of the pipe joint. As disclosed in Japanese Unexamined Patent Publication No. Hei 10-26278, the notch of the fixing plate is engaged with the engagement groove of the pipe joint, and the pipe joint integrally having the fixing plate is fitted into the mounting hole of the fluid device and fixed. Structure for fixing plate to fluid equipment, Utility Model Registration Publication No. 25
As disclosed in Japanese Patent No. 89617, a structure in which a pipe fitting is fitted into a mounting hole of a block, a locking portion of a press fitting is locked in a locking groove of the fitting, and the press fitting is fixed to a fluid device. There is also.

[0005]

However, the structure in which the flange portion integral with the pipe joint is fixed to the fluid device by screws is used, while the pipe joint body made of synthetic resin is used from the viewpoint of cost reduction. It is necessary to mechanically and precisely connect a flange made of a high-strength material to a pipe joint body made of steel from the aspect of function and strength, which requires complicated processing technology and makes it difficult to reduce manufacturing costs. .

Further, a structure in which the other end of the pipe joint body is press-fitted into a mounting groove of a fluid device and a claw portion on an outer peripheral surface of the pipe joint body is cut into an inner peripheral surface of the mounting groove is a method of forming a pipe joint using a metal. It has to be manufactured, which increases the manufacturing cost. Furthermore, since the former uses a synthetic resin pipe joint and the latter uses a metal pipe joint, it is necessary to prepare both a synthetic resin pipe joint and a metal pipe joint. This makes it difficult to reduce manufacturing costs.

An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a pipe joint device capable of using a pipe joint having the same structure and reducing manufacturing costs.

[0008]

A pipe joint device according to the present invention for achieving the above object comprises a pipe joint body having one end connected to a pipe and the other end mounted in a mounting hole of a body to be mounted. A pipe joint device comprising: a fitting member that fits into a fitting hole formed in the other end portion of the pipe joint body to fix the body to be attached and the pipe joint body. It is characterized by comprising a fitting portion fitted into the fitting hole of the pipe joint body, and a large diameter portion having a diameter larger than the fitting portion and located outside the pipe joint body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiment. FIG. 1 is a longitudinal sectional view of the first embodiment. In the pipe joint device according to the first embodiment, a so-called flange mounting method is used. A pipe 2 such as a tube is provided at the upper end of two pipe joint bodies 1 having the same shape.
Are connected to each other, and the lower end of the pipe joint body 1 is attached to a relay member 3 via a fixing member 4, respectively. The relay member 3 is fixed to a body 5 of a fluid device such as an electromagnetic valve or a manifold. The pipe joint body 1 and the relay member 3 are made of synthetic resin, the fixing member 4 is made of metal, and the body 5 is made of metal or synthetic resin. And the pipe joint body 1,
The pipe 2, the relay member 3, the fixing member 4, and the body 5 are provided with fluid channels 6 to 10, respectively.

In the middle of the upper and lower portions of the interior of the pipe joint body 1,
A hole 11 having a diameter larger than that of the fluid channel 6 and into which the tube 2 is inserted is formed. Above the hole 11, a hole 12 having a larger diameter than the hole 11 is formed.
A ring packing 13 for sealing the outer peripheral surface of the pipe fitting, a lock ring 14 for locking the pipe body 2 to the pipe joint body 1, and a guide ring 15 for preventing the lock ring 14 from coming off are fitted. A release ring 16 for releasing the lock is fitted.

At the lower end of the pipe joint body 1, an attachment portion 21 having an outer peripheral surface smaller in diameter than the upper outer peripheral surface and attached to a later-described attachment hole of the relay member 3 has a stepped portion 22. Is formed through. Further, the fluid passage 6 of the pipe joint body 1
A fitting hole 23 into which a fitting portion described later of the fixing member 4 is fitted is formed at a lower end portion of the peripheral wall through a step portion 24.
An annular groove 26 into which the O-ring 25 is fitted is formed on the outer peripheral surface of the mounting portion 21 of the pipe joint body 1.

A boss 31 is provided on the upper surface of the relay member 3, and a mounting hole through which the mounting portion 21 of the pipe joint body 1 is mounted is provided in the opening of the fluid flow path 8 of the relay member 3 including the boss 31. 32, and a flange 33 projecting into the mounting hole 32 and abutting on the end face of the pipe joint body 1 are formed.

The fluid passage 9 of the fixing member 4 communicates with the fluid passage 6 of the pipe joint body 1, and most of the fixing member 4 is fitted into a fitting portion 34 fitted in the fitting hole 23 of the pipe joint body 1. It has been.
The lower part of the fitting part 34 of the fixing member 4 has a larger diameter than the fitting part 34 and is a large diameter part 35 fitted to the inner peripheral surface of the flange 33 of the relay member 3. Has a relay member 3
A flange 36 is formed in contact with the lower surface of the flange 33. The fitting portion 34 is shaped so as to be pressed into the fitting hole 23 of the pipe joint body 1, and the outer peripheral surface of the fitting portion 34 has a claw shape that bites into the inner peripheral surface of the fitting hole 23 of the pipe joint body 1. A projection 37 is formed.

When the pipe joint body 1 is mounted on the body 5, the ring packing 1 is inserted into the hole 12 in the upper part of the pipe joint body 1.
3, the lock ring 14, the guide ring 15, and the release ring 16 are fitted, and the annular groove 2 in the lower part of the pipe joint body 1 is fitted.
6 is fitted with an O-ring 25, and the mounting portion 21 of the pipe joint body 1 is inserted into the mounting hole 32 of the relay member 3. As a result, the O-ring 25 presses against the peripheral wall of the mounting hole 32 of the relay member 3, and the step portion 22 and the lower end surface of the pipe joint body 1 contact the upper end surface of the relay member 3 and the flange 33, respectively. The downward movement of 1 stops.

Next, when the fitting portion 34 of the fixing member 4 is pressed into the fitting hole 23 of the pipe joint body 1 from below the relay member 3,
The large diameter portion 35 of the fixing member 4 fits inside the flange 33 of the relay member 3, the upper surface of the flange 36 of the fixing member 4 contacts the lower surface of the flange 33 of the relay member 3, and the plurality of claws of the fixing member 4 The projection 37 bites into the inner peripheral surface of the fitting hole 23 of the pipe joint body 1. Thereby, the fixing member 4 has its flange 3
The flange 33 of the relay member 3 is sandwiched between the upper surface of the pipe 6 and the lower end surface of the pipe joint body 1 to fix the pipe joint body 1 and the relay member 3.

Then, the relay member 3 to which the pipe joint body 1 is fixed by the fixing member 4 is arranged at a predetermined position on the body 5, and the relay member 3 is fixed to the body 5 by a fixing screw (not shown). Subsequently, the tube 2 is passed through the inside of the release ring 16, the lock ring 14, and the ring packing 13 to form the hole 11.
Press-fit. When removing the pipe joint body 1,
The tube 2 is pulled out by pushing the release ring 16 and the above procedure is performed in reverse.

As described above, in the first embodiment, the mounting portion 21 of the pipe joint body 1 is press-fitted into the mounting hole 32 of the relay member 3, and the fitting portion 34 of the fixing member 4 is connected to the pipe from below the relay member 3. Since the fitting is press-fitted into the fitting hole 23 of the joint body 1, the pipe joint body 1 can be attached to the relay member 3 with a simple structure, and the manufacturing cost can be reduced. Also, by simply changing the shape of the fixing member 4, the pipe joint body 1 having the same shape can be obtained.
Can be attached to various relay members 3, which can contribute to a reduction in manufacturing cost.

FIG. 2 is a partial sectional view of the second embodiment. In the pipe joint device of the second embodiment, a so-called press-fitting method is used. The relay member 3 according to the first embodiment is omitted, and the pipe joint body 1 having the same structure as that of the first embodiment is directly attached to a body 42 having a fixing member 41.

That is, in the fixing member 41, the fluid passage 43, the fitting portion 44, and the claw-shaped projection 45 are the same as those in the first embodiment, but the flange 36 in the first embodiment is omitted. Has been. The large-diameter portion 46 is long in the axial direction and thick, and a claw-shaped projection 47 is also formed on the outer peripheral surface of the large-diameter portion 46. A lower mounting hole 49 to which the large diameter portion 46 of the fixing member 41 is mounted and an upper mounting hole 50 to which the mounting portion 21 of the pipe joint body 1 is mounted are formed in the opening of the fluid flow path 48 of the body 42. Have been.

When attaching the pipe joint body 1 to the body 42, the large diameter portion 46 of the fixing member 41 is pressed into the lower mounting hole 49 of the body 42. Thereby, the plurality of claw-shaped projections 47 of the fixing member 41 bite into the inner peripheral surface of the lower mounting hole 49,
The fixing member 41 is fixed to the body 42. When the mounting portion 21 of the pipe joint body 1 is pressed into the upper mounting hole 50 of the body 42, the fitting portion 44 of the fixing member 41 is press-fitted into the fitting hole 23 of the pipe joint body 1 and the fixing member 4 is pressed.
One plurality of claw-shaped projections 45 bite into the inner peripheral surface of the fitting hole 23 of the pipe joint body 1, and the fixing member 41 fixes the pipe joint body 1 to the body 42.

In the second embodiment, if an adhesive is applied between the outer peripheral surface of the large diameter portion 46 of the fixing member 41 and the inner peripheral surface of the lower mounting hole 49 of the body 42, the fixing member 4
1 and the fixing force of the body 42 can be improved. Similarly, if an adhesive is interposed between the outer peripheral surface of the fitting portion 44 of the fixing member 41 and the inner peripheral surface of the fitting hole 23 of the pipe joint body 1,
The fixing force between the pipe joint body 1 and the fixing member 41 can be improved.

In the first embodiment, the O-ring 25
Is fitted in the annular groove 26 of the mounting portion 21 of the pipe joint body 1, but in the case of the pipe joint body 1 'having no annular groove 26 as shown in FIG. To O
A similar effect can be obtained by fitting the ring 52.

Further, as shown in FIG.
Similar effects can be achieved by fitting O-rings 55 and 56 into annular grooves 53 and 54 provided on the outer peripheral surfaces of the fitting portion 44 and the large diameter portion 46, respectively.

[0024]

As described above, in the pipe joint device according to the present invention, a fixing member is interposed between the attached body and the pipe joint body, and the fixing member is fitted into the fitting hole of the pipe joint body. And a large-diameter portion located outside of the pipe joint body with a diameter larger than that of the fitting section, so that the pipe joint body having the same structure can be variously changed only by changing the shape of the fixing member. The present invention can be applied to an attached body, and can reduce manufacturing costs.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first embodiment.

FIG. 2 is a partial sectional view of a second embodiment.

FIG. 3 is a partial sectional view of a third embodiment.

FIG. 4 is a partial sectional view of a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 'Fitting main body 2 Pipe 3 Relay member 4, 41, 41' Fixing member 5, 42, 42 'Body 21 Mounting part 23 Fitting hole 25, 52, 55, 56 O-ring 32, 49, 50 Mounting Hole 33, 36 Flange 34, 44 Fitting part 35, 46 Large diameter part 37, 45, 47 Claw-shaped projection

Claims (8)

[Claims] 1. A pipe joint body having one end connected to a pipe body and the other end mounted in a mounting hole of a body to be mounted, and fitted into a fitting hole formed in the other end of the pipe joint body. A pipe joint device comprising: the attached body; and a fixing member for fixing the pipe joint body, wherein the fixing member includes a fitting portion that fits into the fitting hole of the pipe joint body; A large-diameter portion having a diameter larger than that of the portion and located outside the pipe joint body. 2. A relay member for fixing the mounted body to a fluid device, the relay member being provided with a flange portion projecting into the mounting hole, wherein the large diameter portion of the fixing member and the pipe joint main body are provided. The pipe joint device according to claim 1, wherein the flange portion of the relay member is sandwiched between the other end portion. 3. The fluid device according to claim 1, wherein the attached body is a fluid device, and the fluid device is provided with a fitting hole communicating with the mounting hole and fitting the large-diameter portion of the fixing member. Pipe fitting equipment. 4. The pipe joint device according to claim 1, wherein the fitting portion of the fixing member is press-fitted into the fitting hole of the pipe joint body. 5. The pipe joint device according to claim 1, wherein an outer peripheral surface of the fitting portion of the fixing member is bonded to an inner peripheral surface of the fitting hole of the pipe joint body. 6. The pipe joint device according to claim 3, wherein the large-diameter portion of the fixing member is press-fitted into the fitting hole of the fluid device. 7. An outer peripheral surface of the large diameter portion of the fixing member and an inner peripheral surface of the fitting hole of the fluid device are adhered.
The pipe joint device according to item 1. 8. The pipe joint device according to claim 1, wherein a claw-shaped projection is provided on at least one of an outer peripheral surface of the fitting portion and an outer peripheral surface of the large diameter portion of the fixing member.