JP2006017230A - Joint for pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable joint for pipe capable of providing high airtightness even if it is used in a vibratory environment by imparting, thereto, a function capable of preventing rattling in the rotating direction resulting from a clearance in a recessed/projected fitting part in the joint for the pipe having a recessed/projected fitting type rotation preventing mechanism. <P>SOLUTION: A clearance prevention means is provided for suppressing the rotating motion of the pipe relative to a connector body in the recessed/projected fitting part of the joint for the pipe connecting the pipe to the connector body and having the recessed/projected fitting type rotation preventing function between the pipe and the connector body. As the clearance prevention means, for example, a part having an elastic body or an elastic function or a magnet is used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe joint, and more particularly to a pipe joint used for piping of a relatively small-diameter thin-walled resin tube or metal tube used as a supply pipe for oil supply or air supply in various vehicles and machines. is there.

  As this type of conventional joint for piping, for example, a joint for piping shown in FIG. 18 is known (see Patent Document 1). This joint for piping includes a pipe P, a connector main body 1 and a socket main body 2. A flow hole 24 is formed in the connector main body 1 at the axial center position, and a seal ring is continuously formed in the axial direction in the flow hole 24. An enlarged-diameter chamber 23 composed of a small-diameter chamber in which the member 26 is accommodated and a large-diameter chamber continuous therewith is formed, and an engagement hole 29 is provided at a position facing the peripheral surface of the large-diameter chamber.

  The socket body 2 includes an annular wall 55 and a projecting wall 55 ′ at the end, an axially extending direction from the annular wall 55, two engaging portions 28 that are outward in the radial direction, and a radial direction. And two locking pieces 25 facing inward, and are provided in the connector body. Then, the engaging portion 28 of the socket body 2 is engaged with the engaging holes 29, 29 'of the connector body 1, so that the socket body is held at a fixed position. Further, an annular bulging wall portion (annular spool) P ′ is formed in the vicinity of one end portion of the pipe P.

  When one end of the pipe P is inserted into the connector main body 1, the locking piece 25 is expanded radially inward after the annular bulging wall portion P 'expands and the annular bulging wall portion passes. When the locking piece 25 is restored, the locking piece 25 and the annular bush 27 hold the annular bulging wall portion P ′ in an engageable manner, and the pipe P is connected to the connector main body 1.

  In the case of the pipe joint having such a configuration, when the pipe P is inserted into the connector body 1, the annular bulging wall portion P ′ is held between the locking piece 25 of the socket body 2 and the annular bush 27, and can be easily achieved with one touch. A joint for piping that can be attached to the connector body 1 can be configured.

  Further, as shown in FIG. 19, a body 30 having a hose connection portion 31 on one end side and a tube insertion portion 32 on the other end side, and a tube body P inserted into the tube insertion portion 32 are prevented from being removed. The body 30 includes a clip 40 that is secured to the body 30 in association with the protrusion P ′, and is configured to connect the hose 41 and the pipe body P in a continuous manner. The clip is formed in an annular shape energized in a reduced diameter state in which both ends thereof are opposed to each other by an elastic material and can be attached to the clip fitting portion. The clip is fixed to the annular inner peripheral surface. There is known a connector provided with a locking claw 42 which is inserted into a hole and locks a tube body of a tube body insertion portion (see Patent Document 2). 43 is a sealing member.

  However, the above-described conventional joint for piping does not include a means for preventing rotation between the pipe and the connector body, and therefore, when used under a vibration state, this rotational displacement occurs and the seal ring In some cases, the member was worn to induce a decrease in airtightness.

As a countermeasure, for example, Patent Document 3 discloses a joint for piping in which a friction applying means is provided between the pipe and the connector to prevent movement in the rotational direction between the pipe and the connector. As this friction imparting means, for example, a method in which a protruding member formed on the inner peripheral surface of the connector body is concavo-convexly fitted into a slit provided at the distal end portion of the pipe, or an outer peripheral surface of the inner peripheral surface of the connector main body and the pipe front end For example, a system in which a friction bush is disposed is used.
Further, in Patent Document 4, a retainer is provided in the retainer so that the spool portion of the male joint member engages and the terminal of the joint member does not come off, and the flattened portion of the male joint member and the retainer are retained. There is disclosed a joint for piping provided with a detent means for preventing relative rotation with a female joint member in cooperation with a portion.

  However, the method of preventing rotational movement between the pipe and the connector by the friction applying means provided between the pipe and the connector (Patent Document 3) makes it difficult to process the tip of the pipe terminal and requires a lot of labor and time. In addition, in the detent means (Patent Document 4) for preventing the relative rotation between the male joint member and the female joint member, the pipe flat portion in the vicinity of the spool portion inserted into the connector is a member from the side. If the space around the connector is small, the workability is poor, especially in places where the connector is difficult to see, making it difficult to confirm the completion of the work. The flat part of the pipe is directional in the circumferential direction, and if the angle varies, it may be difficult or impossible to insert the member. Time assembling unable to complete assembly has a drawback such as such.

  In order to eliminate such disadvantages, the present inventors can not only completely prevent the rotation of the pipe and the connector from moving in the rotational direction even when used in an excited state, but also are simple and easy in terms of mechanism. Piping joints that have a small number of man-hours and can be easily and quickly performed regardless of the presence or absence of the above-described space have been proposed (Patent Documents 5 and 6).

That is, the inventions described in Patent Documents 5 and 6 previously proposed are, for example, a pipe in which an annular bulging wall portion is provided in the vicinity of an end portion, a seal ring member and an annular bush, and faces outward in the radial direction. A connector body provided with a socket body having a plurality of engaging portions and a plurality of locking pieces facing inward in the radial direction, or a socket body having a locking claw on the inner peripheral surface. When the pipe is inserted into the main body, the locking piece of the socket body held by the annular bushing behind the seal ring member and the engaging portion of the connector main body, or the locking of the socket body fitted to the connector main body An anti-rotation means is provided between the pipe and the connector body of the pipe joint for holding the annular bulging portion with a claw and connecting the pipe to the connector body. The mechanism described in Patent Document 5 includes at least one recess or notch recess formed on a part of the inner peripheral surface or the circumference of the end of the connector main body through which the outer peripheral surface of the pipe is inserted; It consists of at least one projecting member provided near the pipe tip side of the annular bulging portion of the pipe, and is a method of fitting the projecting member into the concave and convex portions. And at least one axial projection provided at the rear end of the connector body and at least one provided on the opposite side of the pipe tip of the annular bulging portion of the pipe as corresponding to the projection. A plurality of concave portions, and a method of fitting the convex portions into the concave and convex portions, or a plurality of axial convex portions provided at the rear end of the connector body, and the annular bulging portion of the pipe corresponding to the convex portions. Provided on the opposite side of the pipe tip side Multiple consists of a contact portion has, the abutment portion and the convex portion is a method of engaged abutting engagement.
JP-A-9-280451 JP-A-8-233181 JP-A-7-269765 JP 2002-276878 A Japanese Patent Application No. 2003-407594 Japanese Patent Application No. 2004-186775

  However, the concave-convex fitting type anti-rotation mechanism described in Patent Documents 5 and 6 previously proposed by the present inventors can completely prevent movement in the rotational direction between the pipe and the connector body. Even when used in an environment with a lot of vibration, the seal ring moves relative to the pipe and wears, resulting in a highly reliable pipe joint that hardly deteriorates in airtightness. In addition, it has excellent effects such as small number of assembly steps and easy and quick work regardless of whether there is space in the place of use. There is a gap inevitably, and the parts or parts that fit in and out due to this gap rattle each other in the rotational direction, especially when used for a long time in an environment with a lot of vibrations. May wear wood is likely to occur, a need for improvement has occurred.

  The present invention was made to solve the problem of wear of the seal ring member due to a gap inevitably present in the rotation preventing mechanism of the concave and convex fitting method. By providing a function that can prevent rattling in the rotational direction due to the gap, that is, a function that eliminates the gap, high airtightness can be obtained even when used in an environment with a lot of vibration, and the pipe is more reliable. It is intended to provide a joint.

The joint for piping according to the present invention is a joint for piping for connecting piping to the connector body, and between the piping and the connector body, the joint for piping having an anti-rotation function by the uneven fitting method between them, The concave-convex fitting portion is provided with a gap preventing means for suppressing the rotational movement between the pipe and the connector main body.
As the gap preventing means for suppressing the rotational movement, a method of providing a convex elastic holding part on the concave side of the concave and convex fitting part can be used, and as the convex elastic holding part provided on the concave side, The convex portion can be constituted by a gap portion that can be elastically sandwiched.
Further, as the gap preventing means for suppressing the rotational movement, a method of assembling an elastic body or a part having an elastic function to at least one of the uneven fitting portions can be used. As an elastic body to be attached or a part having an elastic function, any one of a U-shaped spring material, rubber, elastic resin, and spring that can be fitted in a gap provided between the concave and convex fitting portions, or a combination thereof is used. A combination of them can be used.
Furthermore, as a gap preventing means for suppressing the rotational movement, a pipe-side convex portion that fits into a concave portion on the connector main body side of the concave-convex fitting portion may be formed of a U-shaped spring material.
Further, as another joint for piping according to the present invention, in the joint for piping having a rotation prevention function between the pipe and the connector body, rotation for suppressing the rotational motion between the pipe and the connector body. As the movement preventing means, the pipe and the connector main body are attracted to each other by a magnet attracting method. Further, as a rotational motion preventing means for suppressing the rotational motion in the joint for piping adopting a method of attracting the pipe and the connector main body by the magnet attracting method, in addition to the magnet attracting method, the pipe and It is possible to use a method in which the connector main bodies are concavo-convexly fitted. In the case of this magnet attracting method, either the concave side or the convex side may be made of metal and the other may be made of a magnet.

  The present invention provides a gap between a pipe and a connector body that inevitably exists in a concave-convex fitting portion of a joint for piping having a rotation prevention function by a concave-convex fitting method between parts due to dimensional accuracy or variation of parts. By providing a clearance prevention means to eliminate the gaps, the rotational movement between the concave and convex mating parts or parts can be suppressed, and rattling at the concave and convex mating parts can be almost completely prevented, so it is used in an environment with a lot of vibration. Even in such a case, a highly reliable joint for pipes is obtained in which the seal ring does not move relative to the pipe and wears, resulting in a decrease in airtightness.

FIG. 1 is a plan view of a main part showing a first embodiment of a pipe joint according to the present invention, FIG. 2 is a plan view of the main part showing a second embodiment of the present invention, and FIG. FIG. 4 is a perspective view of an essential part showing a fourth embodiment of the present invention, and FIGS. 5A and 5B are used in the embodiment shown in FIGS. FIG. 6 is a perspective view of the main part showing the fifth embodiment of the present invention, and FIG. 7 is a partially broken plan view of the main part of the sixth embodiment of the present invention. FIG. 8, FIG. 8 is a partially broken plan view of the main part showing the seventh embodiment of the present invention, FIG. 9 is a perspective view of the main part showing the eighth embodiment of the present invention, and FIG. FIG. 11 is a perspective view of a main part showing a ninth embodiment of the present invention, and FIG. 12 is a main part showing a tenth embodiment of the present invention. Slant FIGS. 13A and 13B are perspective views of essential parts of the eleventh embodiment of the present invention, FIG. 14 is a perspective view of essential parts of the twelfth embodiment of the present invention, and FIGS. FIGS. 16A, 16B, and 16C are perspective views of the main part showing a modification of the magnet on the connector body side in the embodiment shown in FIG. 15, and FIGS. FIG. 16B is a perspective view showing a modification of the metal member on the piping side in the embodiment shown in FIG.
In each embodiment, the configuration other than the rotation prevention means is substantially the same as that of the conventional joint for piping already described with reference to FIG. 18, and therefore only the rotation prevention means portion will be described in each embodiment.

  That is, the pipe joint according to the present invention is provided between the pipe P and the connector body 1 provided between the outer peripheral surface of the pipe P and the connector body 1 on the side opposite to the pipe tip side of the annular bulging portion P ′ of the pipe P. In the embodiment shown in FIG. 1 to FIG. 10, a concave and convex fitting is provided on the connector body 1 side and a convex portion on the pipe P side. FIG. 1 shows a joint for a pipe when a gap prevention means is provided in a combined type anti-rotation mechanism. In the first embodiment shown in FIG. 1, a shaft is attached to the rear end of the connector body 1 through which the pipe P is inserted. In a state where the concave portion 1-1 having an appropriate length is formed in the direction, the elastic holding portion 1-2 of the protruding member 3 on the pipe P side is provided in the concave portion 1-1, and the connector main body 1 is assembled to the pipe P. The protrusion member 3 on the pipe P side is provided with an elastic holding part 1-2 in the concave part 1-1 on the connector body 1 side. By unevenness fitted with, projection member 3 is what always without the gap without uneven fit is a mechanism by the elastic holding section 1-2. Here, the elastic holding portion 1-2 has a concave portion formed narrower than the thickness of the protruding member 3 by projecting the opposing surface inside the concave portion 1-1 in an arc shape, and on both sides of the arc-shaped projecting portion. It can be provided by drilling the window hole 1-3. Further, the protruding member 3 on the pipe P side is integrally formed with the piece 3-1, and the piece 3-1 is fixed to the outer peripheral surface of the pipe P by means such as brazing, welding, and bonding. Yes.

  In the second embodiment shown in FIG. 2, instead of the elastic holding portion 1-2 of the concave portion 1-1 provided on the connector main body 1 side, one of the inner surfaces of the concave portion 1-1 is a flat surface and only the other is an arc shape. The configuration is the same as that of the first embodiment shown in FIG. Therefore, also in the case of this pipe joint, in the state where the connector main body 1 is assembled to the pipe P, the protruding member 3 on the pipe P side is inserted into the concave portion 1-1 on the connector main body 1 side through the elastic holding part 1-2. By engaging the projections and depressions, the projection member 3 is always fitted with projections and depressions without any gap by the elastic holding portion 1-2.

  The third embodiment shown in FIG. 3 is the same as that described above except that the elastic holding portion 1-2 of the protruding member 3 is configured by a U-shaped spring material 4 that can be fitted in a gap provided between the concave and convex fitting portions. The configuration is the same as that of the first embodiment shown in FIG. That is, in the rear end portion of the connector main body 1, a recess 1-1 larger than the rotation direction width of the protruding member 3 on the pipe P side is formed, and the connector main body 1 is assembled to the pipe P. And the U-shaped spring material 4 is provided in the gap formed between the inner surface in the rotational direction of the recess 1-1 and the protrusion member 3. By pushing and assembling, the projection member 3 is always fitted in a concave and convex manner by the elastic holding portion 1-2 without a gap. The U-shaped spring material 4 is made of a metal having spring properties such as spring steel, and is fixed to the connector main body 1 or the protruding member 3 by means such as welding or adhesion in addition to press-fitting.

  The fourth embodiment shown in FIG. 4 has the same configuration as that of the embodiment shown in FIG. 3 except that the U-shaped spring material 4 is changed in direction and incorporated into the concave-convex fitting portion. Therefore, also in the case of this pipe joint, while the connector main body 1 is assembled to the pipe P, the protruding member 3 on the pipe P side is fitted into the concave portion 1-1 on the connector main body 1 side, and the concave portion When the U-shaped spring material 4 is pushed into a gap formed between the circumferential inner surface 1-1 and the protruding member 3 and assembled, the protruding member 3 is always fitted with an uneven shape by the elastic holding portion 1-2 without a gap. Combined.

The spring material 4a shown in FIG. 5 (a) is an elastic with a so-called stopper in which the U-shaped spring material 4 shown in FIG. 3 is provided with a flange 4a-1 for preventing the spring material from being pushed too much inward. The spring material 4b shown in FIG. 5 (b) is a flange 4b− for preventing the spring material from being pushed too much into the U-shaped spring material 4 shown in FIG. 1 is an elastic material with a stopper.
Note that the spring material shown in FIGS. 3 to 6 is merely an example, and it is needless to say that an arbitrary shape or structure having the same effect can be used.

  The fifth embodiment shown in FIG. 6 is the same as the third embodiment shown in FIG. 3 except that instead of the U-shaped spring material 4, an elastic body 4c made of hard rubber or elastic resin is used. It is the same configuration. Therefore, in the case of this joint for piping, while the connector main body 1 is assembled to the pipe P, the projection member 3 on the pipe P side is engaged with the concave portion 1-1 on the connector main body 1 side, and the concave portion When the elastic body 4c is pushed into a gap formed between the inner surface in the rotation direction 1-1 and the protruding member 3, the protruding member 3 is always fitted in a concavo-convex shape without any gap by the action of the elastic body 4c.

  The sixth embodiment shown in FIG. 7 and the seventh embodiment shown in FIG. 8 employ a component composed of a coil spring and a pad in place of the U-shaped spring members 4, 4a and 4b and the elastic body 4c. In the sixth embodiment shown in FIG. 7, the inner surface of the concave portion 1-1 that is larger than the rotational width of the protruding member 3 on the pipe P side provided at the rear end portion of the connector body 1 is arranged on one inner surface. A hole 1-4 having an appropriate depth is formed in a direction perpendicular to the inner surface, and a coil spring 4d-1 housed in the hole 1-4 and a pad 4d-2 in which a rotational force is always urged by the coil spring. In the state where the elastic part 4d is first attached to the connector body 1, the protruding member 3 on the pipe P side is fitted into the recess 1-1 on the connector body 1 side. By combining, the coil sp of the elastic component 4d Ring 4d-1 protruding member 3 through the pad 4d-2 by is that without the pressed constantly without any gap irregularities fit the mechanism.

  The seventh embodiment shown in FIG. 8 has the same configuration as that of the sixth embodiment shown in FIG. 7 except that the elastic component 4d is provided on the protruding member 3 on the pipe P side. That is, in the seventh embodiment shown in FIG. 8, a hole 3-2 having an appropriate depth is formed at the tip of the protruding member 3 on the pipe P side in a direction perpendicular to the protruding member, and the hole 3-2 is internally provided. A protruding member that is concavo-convexly fitted in the concave portion 1-1 on the connector body 1 side by an elastic component 4d that is configured by the coil spring 4d-1 and a pad 4d-2 that is always biased in the rotational direction by the coil spring. 3 is always brought into contact with the other inner surface in the rotational direction of the recess 1-1 without any gap. Note that the coil spring 4d-1 and the pad 4d-2 of the elastic component 4d may have either an integral structure or a divided structure.

  In the eighth embodiment shown in FIG. 9, the projecting member 3 on the pipe P side that fits into the recess 1-1 on the connector body 1 side is formed of a U-shaped spring material. The U-shaped portion 3-3 of the projection member 3 made of a spring material having a U-shaped portion 3-3 at the tip portion provided on the pipe P side is pushed into and fitted into the concave portion 1-1 provided at the rear end portion. Thus, the protruding member 3 is structured such that the U-shaped portion 3-3 always fits in and out without gaps.

  FIG. 10 shows a modified example of the protruding member in the eighth embodiment shown in FIG. 9, which replaces the protruding member 3 made of a single spring plate material shown in FIG. 9 with a U-shaped portion 3-3 at the tip. Is a protrusion member 3 made of a separate spring material. That is, in the case of the protruding member 3 made of a single spring plate material, the spring property is lowered when brazed or welded to the pipe P, so the U-shaped portion 3-3 at the tip is made of a separate spring material. The protruding member 3 is configured by assembling the separate U-shaped portion 3-3b to the tip of the protruding member main body 3-3a made of non-spring material brazed or welded to the pipe P. The means for assembling the U-shaped part 3-3 made of the spring material is not particularly limited, but as shown in the figure, a concave part 3-3c for assembling is formed at the end of the U-shaped part 3-3. Then, it is possible to use means for fitting this portion to the projection member main body 3-3a made of a non-spring material by fitting it in an uneven manner.

  Next, the embodiment shown in FIGS. 11 to 12 is a pipe in which a clearance prevention means is provided in an anti-rotation mechanism of an uneven fitting type in which a convex part is provided on the connector body 1 side and a concave part is provided on the pipe P side. 11 shows a first embodiment of the present invention, in which a ninth embodiment shown in FIG. 11 is a projection 1-5 having a substantially cross-sectional rectangular shape with an appropriate length protruding in the axial direction integral with the main body provided at the rear end of the connector main body 1. In the recessed member 5 fixed to the pipe P to be fitted to the pipe, the engaging recessed part 5-1 larger than the rotation direction width of the protrusion 1-5 is formed, and the connector main body 1 is assembled to the pipe P. The protrusion 1-5 on the connector main body 1 side is engaged with the engaging recess 5-1 of the recess member 5 fixed to the outer peripheral surface of the pipe P, and the inner surface in the rotation direction of the engaging recess 5-1 and the protrusion 1- 5 and the slit 1-6 provided in advance on the connector main body 1 side, and is locked at the end. By incorporating push the spring member 4e of U-shaped having a 4e-1, in which always without a gap without uneven fit is a mechanism by the action of the projection 1-5 and the concave member 5 spring member 4e.

  The tenth embodiment shown in FIG. 12 is the same as the ninth embodiment except that a substantially wedge-shaped elastic body 4f made of hard rubber or elastic resin is used instead of the U-shaped spring material 4e. It is the same configuration. That is, the concave member 5 fixed to the pipe P side fitted to the projection 1-5 having a substantially cross-sectional rectangular shape with an appropriate length protruding in the axial direction integral with the main body provided at the rear end portion of the connector main body 1 An engagement recess 5-1 of the recess member 5 fixed to the outer peripheral surface of the pipe P in a state where the engagement recess 5-1 larger than the rotation direction width of the protrusion 1-5 is formed and the connector main body 1 is assembled to the pipe P is provided. -1 and the projection 1-5 on the connector main body 1 side are concavo-convexly fitted, and the substantially wedge-shaped projection is formed in the gap formed between the inner surface in the rotation direction of the engagement recess 5-1 and the projection 1-5. By pushing in and incorporating the elastic body 4f, the projection 1-5 and the concave member 5 are always fitted with a concave and convex shape without any gap by the action of the elastic body 4f. In addition, it cannot be overemphasized that it replaces with the said elastic body 4f, and the U-shaped spring material 4 shown in the said FIG. 3, FIG. 4 can be used.

  The embodiment shown in FIGS. 13 to 17 shows a system in which the pipe and the connector body are attracted to each other by a magnet attracting system. The eleventh embodiment shown in FIG. 13 is a magnet on the connector body 1 side. A metal plate 13 made of iron plate or the like is fixed to the pipe P side, and the metal plate 13 fixed to the outer peripheral surface of the pipe P is attached in a state where the connector body 1 is assembled to the pipe P. By abutting and adsorbing to the protrusion 1-7 on the connector main body 1 side, the protrusion 1-7 and the metal plate 13 are always in contact with no gap.

  In the twelfth embodiment shown in FIG. 14, contrary to the above, a metal plate 13 made of iron plate or the like is attached to the connector body 1 side, a projection 23 made of a magnet is fixed to the pipe P side, and the connector body 1 is attached to the pipe P. In the state in which the metal plate 13 and the projection 23 are always attached to each other by adhering the magnet projection 23 fixed to the outer peripheral surface of the pipe P to the metal plate 13 on the connector main body 1 side so as to be adsorbed. It is a mechanism that makes contact.

  In the thirteenth embodiment shown in FIG. 15, the connector body 1 and the disk in the state where the connector body 1 side is a magnet, the metal disk 13 a is attached to the pipe P side, and the connector body 1 is assembled to the pipe P. This is a method of preventing mutual rotation by adsorbing 13a.

  FIGS. 16A, 16B, and 16C illustrate a method of attaching the magnet on the connector body 1 side in the thirteenth embodiment as a separate body to the rear end portion of the connector body 1, and FIG. (B) is a method in which a concave portion is provided in the rear end portion of the connector main body 1 and an arc-shaped magnet 1-9 is assembled, and (c) is a connector main body. 1 shows a method of embedding a magnet 1-10 of an appropriate size at the rear end of one.

  17 (a) and 17 (b) are modifications of the metal plate on the pipe P side in the thirteenth embodiment, and FIG. 17 (a) replaces the metal disk 13a with a protruding piece 13a-1. A method of adhering the protruding portion at the tip to the magnet on the connector body 1 side by brazing, welding, bonding, heat shrinking tube or the like to the outer peripheral surface of P, and (b) is a method for thinning the protruding piece 13a-1 It is made of a thick plate material, arranged in the opposite direction to the above, and the side opposite to the projection is fixed to the outer peripheral surface of the pipe P at the portion entering the inside of the connector body 1, and the projection is attached to the magnet on the connector body 1 side. This is an example of the adsorption method.

  In addition, although the case where it applied to the joint for piping shown in FIG. 18 was demonstrated here as an example, the rotation prevention means using the uneven | corrugated fitting system of this invention and the rotation stop system using the convex part provided in the connector main body side are used. Needless to say, the rotation preventing means can be applied to the connector shown in FIG. 19 and various connectors having similar functions and configurations.

  The present invention is also applicable to connectors used for various pipes such as relatively thin-diameter thin-walled resin tubes or metal tubes, which are used as supply tubes for oil supply and supply air, particularly for various vehicles and machines.

It is a top view of the important section showing the 1st example of the joint for piping concerning the present invention. It is a top view of the principal part which similarly shows 2nd Example of this invention. It is a perspective view of the principal part which similarly shows 3rd Example of this invention. It is a perspective view of the principal part which similarly shows 4th Example of this invention. FIG. 5 is a perspective view showing a modification of the elastic material used in the embodiment shown in FIGS. 3 to 4. FIG. 5A is a hooked elastic material used in the embodiment shown in FIG. 3, and FIG. The elastic material with a hook used in the example shown in FIG. It is a perspective view of the principal part which similarly shows 5th Example of this invention. It is a partially broken top view of the principal part which similarly shows 6th Example of this invention. It is a partially broken top view of the principal part which similarly shows 7th Example of this invention. It is a perspective view of the principal part which similarly shows 8th Example of this invention. It is a perspective view which shows the modification of the elastic material used in the Example shown in FIG. It is a perspective view of the principal part which similarly shows 9th Example of this invention. It is a perspective view of the principal part which similarly shows 10th Example of this invention. It is a perspective view of the principal part which similarly shows 11th Example of this invention. It is a perspective view of the principal part which similarly shows 12th Example of this invention. It is a perspective view of the principal part which similarly shows 13th Example of this invention. It is a perspective view of the principal part which shows the modification of the magnet of the connector main body side in the Example shown in FIG. 15, (a) is the system which attaches the ring-shaped magnet 1-5 to the rear-end part of the connector main body 1, (b). Shows a method of incorporating the magnet 1-6 into the rear end portion of the connector main body 1, and (c) shows a method of embedding the magnet 1-7 at the rear end portion of the connector main body 1. It is a perspective view which shows the modification of the metal member by the side of the piping in the Example shown in FIG. 15, (a) and (b) show the example which attached the piece with a protrusion each in reverse direction. It is an expanded vertical side view which shows an example of the coupling for conventional piping. It is an enlarged vertical side view which similarly shows the other example of the conventional coupling for piping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connector main body 1-1, 3-3c Concave 1-2 Elastic holding | maintenance part 1-3 Window hole 1-4, 3-2 Hole 1-5, 1-7, 23 Protrusion 1-8 Ring-shaped magnet 1-9 yen Arc-shaped magnet 1-10 Magnet 3 Protruding member 3-1 Piece 3-3, 3-3b U-shaped portion 3-3a Protruding portion main body 4, 4a, 4b, 4e Spring material 4a-1, 4b-1 鍔 4c, 4f Elasticity Body 4d Elastic part 4d-1 Coil spring 4d-2 Pad 4e-1 Locking part 5 Recessed material 5-1 Engaging recessed part 13 Metal plate 13a Disk 1-8 Ring-shaped magnet 1-9 Arc-shaped magnet 1-10 Magnet 13a-1 P with projection P Piping

Claims (8)

A pipe joint for connecting a pipe to a connector body, wherein the pipe joint has a rotation prevention function between the pipe and the connector body by means of an uneven fitting method between the pipe and the connector body. A joint for piping provided with a gap preventing means for suppressing the rotational movement between the main bodies. 2. The piping according to claim 1, wherein as the gap prevention means for suppressing the rotational movement, a method of providing a convex elastic holding portion in a concave portion provided on the connector main body side of the concave and convex fitting portion is used. Fittings. The joint for piping according to claim 2, wherein the convex elastic holding portion provided in the concave portion on the connector main body side of the concave and convex fitting portion is constituted by a gap portion capable of elastically holding the convex portion. The joint for piping according to claim 1, wherein a method of assembling an elastic body or a part having an elastic function to at least one of the concave and convex fitting portions is used as the gap prevention means for suppressing the rotational movement. . Any of a U-shaped spring material, rubber, elastic resin, and spring that can be fitted into a gap provided between the concave and convex fitting portions by an elastic body or an elastic function part to be assembled to the concave and convex fitting portions. The joint for piping according to claim 4, which is configured by one or a combination thereof. 2. The convex portion on the piping side that fits into the concave portion on the connector main body side of the concave-convex fitting portion is configured by a U-shaped spring material as gap prevention means for suppressing the rotational movement. The joint for piping described in 2. A pipe joint for connecting a pipe to a connector body, wherein the pipe joint is provided with a function for preventing rotation between the pipe and the connector body. A pipe joint characterized in that the pipe and the connector main body are adsorbed as a means for preventing rotational movement by an adsorption method using a magnet. The joint for piping according to claim 7, wherein as the rotational motion preventing means for suppressing the rotational motion, a system in which the pipe and the connector main body are unevenly fitted by a magnet attracting system is used.

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