JP3204685B2 - Piping 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, and more particularly to a pipe joint used for a pipe having a small diameter of 20 mm or less, which is used as a supply pipe for supplying oil or air to various vehicles and machines.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view of a conventional pipe joint of this type. The pipe joint comprises a pipe P, a connector main body 1 and a socket main body 2. The connector main body 1 has a through hole at an axial center position. 24, a large-diameter chamber 23 consisting of a small-diameter chamber accommodating the seal ring member 26 via a backup ring 26a and a large-diameter chamber connected to the flow-through hole 24 in the axial direction. Engagement holes 29 and 29 'are formed at opposing positions on the peripheral surface of the large-diameter chamber.

The socket body 2 has an annular bush 2 at the end.
And two engaging pieces 2 formed integrally with the annular bush 27 so as to extend in the axial direction and elastically displaced radially outward.
8 and two locking pieces 25 elastically displaced radially inward. Further, an annular bulging wall portion P 'is formed near one end of the pipe P.

The socket body 2 is inserted from one end of the pipe P, and the locking piece 25 passes over the annular bulging wall portion P ', and the locking piece 25 and the annular bush 27 form an annular expansion. The socket body 2 is locked to the pipe P in a state where the projecting wall portion P 'is sandwiched. Then, the engagement pieces 2 of the socket body 2 are inserted into the engagement holes 29 and 29 ′ of the connector body 1 inserted through the one end of the pipe P outside the socket body 2.
The connector body 1 is attached to the pipe P via the socket body 2 in a state in which the connector body 8 is engaged.

As described above, in the conventional pipe joint,
Piping P in which socket body 2 is locked to annular bulging wall P '
In addition, the connector body 1 can be easily mounted with one touch to form a piping joint.

[0006]

In the above-described conventional pipe joint, when the socket body 2 is attached to the pipe P, the locking piece 25 of the socket body 2 engages the annular bulging wall P 'of the pipe P. The annular bulging wall portion P 'moves over the locking piece 2
The socket body 2 is attached to the pipe P by being sandwiched between the socket 5 and the annular bush 27. For this reason, the distance between the tip of the locking piece 25 and the annular bush 27 needs to be larger than the thickness of the annular bulging wall P 'of the pipe P in the axial direction. Therefore, a displacement may occur in the axial direction on the pipe P side in the connected state, and particularly when used in a vibrating state, the displacement may cause the seal ring member 26 to wear and reduce airtightness. May be induced.

SUMMARY OF THE INVENTION The present invention has been made in view of the present situation of the above-mentioned type of pipe joint, and has as its object the connection between the pipe and the connector body in the axial direction and the radial direction in the connected state. It is an object of the present invention to provide a piping joint in which a seal ring member is extended in life by preventing displacement and a seal ring member is compressed in an axial direction to apply a pressing force in a radial direction to further improve sealing performance.

[0008]

In order to achieve the above object, a pipe joint according to the present invention comprises: a pipe having an annular bulging wall in the vicinity of an end; an annular bush; A plurality of engaging pieces and a plurality of locking pieces elastically displaced radially inward. The annular bush and the locking pieces clamp an annular bulge of a pipe assembled therewith. An engagement portion for engaging the engagement piece with the socket main body to be engaged with the pipe; a seal ring member provided inside the socket body; and the socket body is attached to engage the engagement piece with the engagement portion. In a piping joint having a connector body for connecting the piping by joining, a taper made of an elastic material having a contact surface inclined with respect to a surface perpendicular to an axis between the piping and the connector body. A ring member and the tapered ring member are attached to the locking piece. As well as, and it is characterized in that the means for compressing the sealing ring member in the axial direction is disposed.

[0009]

With the above construction, the socket body is assembled to the connector body so that the engagement piece of the socket body is engaged with the engagement portion, and then the pipe is inserted to connect the annular bulging wall portion to the socket. Hold it between the annular bush of the main body and the locking piece,
Alternatively, the annular bulging portion of the pipe is previously sandwiched between the annular bush and the locking piece of the socket main body, and the engaging piece of the socket main body is engaged with the engaging section of the connector main body in the pipe in which the socket main body is assembled. Then, the connector body is mounted. In this case, a tapered ring member including at least two ring members made of an elastic material provided between the pipe and the connector main body is pressed in the axial direction by means for urging the tapered ring member to the engagement piece of the socket main body. One of the ring members presses the outer peripheral surface of the pipe at right angles to the axis, and the other ring member presses the inner peripheral surface of the connector body at right angles to the axis. And acts as a vibration damper in the radial direction, prevents wear of the seal ring member, and compresses the seal ring member in the axial direction so that the inner peripheral surface of the pipe and the connector body Further, a further pressing force is applied to the outer peripheral surface of the first member to improve the sealing property therebetween.

[0010]

An embodiment of the present invention will now be described with reference to FIG.
1 to 3 in which the same reference numerals are given to the same parts as those described above. In each of the embodiments, the configuration other than the tapering member is substantially the same as the conventional piping joint described with reference to FIG. 4, and therefore, in each embodiment, the description of the same components as the conventional is omitted. .

In the first embodiment, as shown in FIG. 1, a concave portion 1a is provided in the axial direction on the distal end side of the small-diameter chamber of the connector main body 1, and a spring 35 is provided in the concave portion 1a. A tapered ring member including ring bodies 36 and 37 is disposed between the spring 35 and the backup ring 26 a at the distal end of the small diameter chamber disposed adjacent to the seal ring member 26. In addition, a tapered ring member including a ring body 38 is disposed between the backup ring 26 a at the rear end side of the small diameter chamber and the annular bush 27 which are arranged adjacent to the seal ring member 26 in the small diameter chamber. The ring bodies 36 and 37 constituting the tapered ring member are formed of an elastic material.
A contact surface having the same inclination with respect to a plane perpendicular to the axis is formed, and the ring bodies 36 and 37 are disposed in the small-diameter chamber with the contact surfaces facing each other. . The ring body 38 is also formed of an elastic material, and the ring body 38 also has a contact surface inclined with respect to a plane perpendicular to the axis. The annular bush 27 is formed with the same inclined contact surface, and the ring member 38 is brought into contact with the contact surface with the contact surface, and the ring member 38 is disposed in the small-diameter chamber.

The other parts of the structure of the first embodiment are the same as those of the conventional pipe joint described with reference to FIG.

In the first embodiment having such a configuration, when the connector body 1 is engaged with the socket body 2 and the pipe P is inserted through the connector body 1 as already described with reference to FIG. Ring body 3 by spring 35
7 is pressed in the axial direction, and this pressing force is transmitted to the ring body 36 via the contact surface. Therefore, the ring bodies 36, 3
7, a pressing force is applied to the outer peripheral surface of the pipe P and the inner peripheral surface of the connector main body 1, and relative displacement of the pipe P and the connector main body 1 in the axial direction and the radial direction is prevented. Wear is prevented. Also spring 3
The spring force of No. 5 is transmitted to the seal ring member 26 via the ring members 37 and 36 made of an elastic material and the backup ring 26a, and the seal ring member 26 is compressed in the axial direction so that the seal ring member 26 is compressed. The outer peripheral surface of the pipe P and the inner peripheral surface of the connector main body 1 are pressed, so that the sealing performance is further improved. Further, since the ring body 38 made of an elastic material is sandwiched between the annular bush 27 and the backup ring 26a while being pressed in the axial direction, the relative movement of the pipe P and the connector body 1 in the axial direction and the radial direction. Displacement is prevented.

If the ring bodies 36 and 38 are provided with a single axial slit, the diameter can be easily reduced and the sealing performance can be further improved.

As described above, according to the first embodiment, the pipe P
, The relative movement of the connector body 1 in the axial direction is completely prevented, and the sealing performance of the pipe joint can be greatly improved.

In the second embodiment, as shown in FIG. 2, a recess 1a is provided in the axial direction on the distal end side of the small-diameter chamber of the connector body 1, and a spring 35 is provided in the recess 1a. A tapered ring member composed of ring bodies 41, 42, 43 is disposed between the seal ring members 26 via a backup ring 26a. On both end surfaces of the ring body 42 in the axial direction, contact surfaces inclined with respect to a surface perpendicular to the axis are formed, and the ring bodies 41 and 43 are provided on the contact surfaces of the ring body 42, respectively. An opposing contact surface is formed.

The other parts of the structure of the second embodiment are the same as those of the conventional pipe joint described with reference to FIG.

In the second embodiment having such a structure, the socket main body 2 is engaged with the pipe P and the connector main body 1 is engaged with the socket main body 2 as already described with reference to FIG. And the spring force in the axial direction of the spring 35, the backup ring 26a, the seal ring member 26
The ring member 43 is transmitted to the ring member 43 through the shaft, and the ring member 43 is pressed in the axial direction. Since this pressing force is transmitted to the ring bodies 42, 41 which are in contact with each other on the inclined contact surface, the outer peripheral surface of the pipe P and the inside of the connector body 1 are formed by the ring bodies 41, 42, 43 made of an elastic material. A pressing force is applied to the peripheral surface, and relative displacement between the pipe body P and the connector body 1 in the axial direction and the radial direction is prevented, so that the wear of the seal ring member 26 is prevented. The spring force of the spring 35 is transmitted to one of the seal ring members 26 via the backup ring 26a, and furthermore, the ring bodies 43, 42, 41
Is also transmitted to the other seal ring member 26 via.
For this reason, when these seal ring members 26 are compressed in the axial direction, a pressing force is applied to the outer peripheral surface of the pipe P and the inner peripheral surface of the connector body 1, and the axial center of the pipe P and the connector body 1 is compressed. The relative displacement in the directions is prevented, and the sealing performance is improved.

As described above, in the second embodiment as well, the relative movement of the pipe P and the connector body 1 in the axial direction is completely prevented, and the sealing performance of the pipe joint is greatly improved. Will be possible.

As shown in FIG. 3, the third embodiment differs from the second embodiment in that the connector body 1 is in contact with the ring body 42.
A concave portion 50 is provided on an inner peripheral surface of the ring member 50, and a spring 51 is provided in the concave portion 50. Preferably, a low friction material 42 'is provided on an outer peripheral surface of the ring body 42 which contacts the spring 51. The configuration of other parts of the third embodiment is the same as that of the second embodiment already described with reference to FIG.

Incidentally, the ring body 4 for the same reason as described above.
It is preferable to provide one axial slit also at 1, 42 and 43.

In the third embodiment, the pressing force applied to the coil body 1 and the tube P by the ring bodies 41, 42, 43 is added by adding a spring 51 in the same manner as in the second embodiment. By increasing, the relative displacement between the pipe P and the connector body 1 in the axial direction and the radial direction can be completely prevented, and the compressive force on the seal ring member 26 in the axial direction can be further increased.

In the above embodiment, the spring 35 is disclosed as a means for urging the tapering member in the direction of the locking piece 25, but an elastic seal may be used instead of the spring.

As described above, according to each embodiment,
By providing various tapering members and providing a means for urging the tapering members against the locking pieces, displacement of the connector body 1 with respect to the pipe P in the axial direction can be prevented, and vibration is prevented in the radial direction. Is effectively performed, and the seal ring member is compressed in the axial direction to apply a further pressing force to the inner peripheral surface of the pipe and the outer peripheral surface of the connector main body, thereby improving the sealing performance between the two and increasing the vibration. Even if used under conditions, the seal ring member will not wear and the airtightness will not decrease,
Further, it is possible to provide a pipe joint in which the airtightness is positively improved.

[0025]

According to the present invention, the taper ring member made of an elastic material and the means for urging the taper ring member to the locking piece of the socket body are provided between the pipe and the connector body. The shaft is prevented from moving in the axial direction, and vibration is prevented in the radial direction.Even when used in an environment with a lot of vibration, the seal ring member will not wear and the airtightness will not be reduced. A further improved pipe joint is provided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a first example of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a second example of the present invention.

FIG. 3 is an explanatory diagram showing a configuration of a main part of a third embodiment of the present invention.

FIG. 4 is an explanatory view showing a configuration of a conventional pipe joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector main body 2 Socket main body 25 Locking piece 27 Annular bush 28 Engaging piece 35 Spring 36, 37, 38, 41, 42, 43 Ring body 50 Depression 51 Spring P Piping P 'Annular bulging wall

────────────────────────────────────────────────── ─── Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 37/00-37/48 F16L 33/23 F16L 47/06

Claims (4)

(57) [Claims] 1. A pipe provided with an annular bulging wall near an end thereof, an annular bush, a plurality of engagement pieces elastically displaced radially outward, and a plurality of engagement pieces elastically displaced radially inward. A socket having a stop piece, the socket body being locked to the pipe by clamping an annular bulge of the pipe assembled by the annular bush and the locking piece; And a connector body for connecting the pipe by mounting the socket body and engaging the engaging piece with the engaging portion by mounting the socket body. Between the pipe and the connector body, a tapered ring member made of an elastic material having a contact surface inclined with respect to a plane perpendicular to the axis, and biasing the tapered ring member to the locking piece; Means for compressing the seal ring member in the axial direction. A pipe joint, which is provided. 2. The tapered ring member according to claim 1, wherein two ring members having one contact surface inclined with respect to a surface perpendicular to the axis are in contact with each other. The joint for piping according to 1. 3. The tapered ring member has two ring bodies having one contact surface inclined with respect to a plane perpendicular to the axis, and two contact bodies inclined with respect to a plane perpendicular to the axis. 2. The piping joint according to claim 1, wherein one ring body having a surface is configured to face each other. 4. The tapering member according to claim 1, wherein the tapering member has a substantially axial slit at one position.
Piping fitting as described.