JPH0960782A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint capable of obtaining the stable connection state by coupling a connecting coupling piece into a connecting coupling groove to prevent a release, and coupling a rotation preventing pawl into a coupling hole. SOLUTION: The position of a connecting coupling piece 14 is made to coincide with the position of the insertion port 24b of a connecting coupling groove 24, the cylinder inserting pipe 15 of a plug 1 is inserted into the insertion port 21 of a socket 2, and the front end faces of the plug 1 and the socket 2 are butted together. When handhold blades 11, 22 are held by hands respectively and the plug 1 is rotated in the forward direction to make the handhold blades 11, 22 coincide with each other, a connecting coupling piece 14 inserted into the insertion port 24b of the connecting coupling groove 24 slidingly moves the release prevention section 24 a of the connecting coupling groove 24 to the handhold blade 22 side, a rotation preventing pawl 13 is inserted into a coupling hole 23, and the connection of the plug 1 and the socket 2 is completed. The connection of the plug 1 and the socket 2 is invariably completed when the rotation preventing pawl 13 is inserted into the coupling hole 23, and the connection state of the plug 1 and the socket 2 is stabilized with no personal difference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint useful for connecting pipes and the like.

[0002]

2. Description of the Related Art Conventionally, a plug and a socket have been constructed. The insertion tube of the plug is inserted into the insertion opening of the socket and the cap nut provided on the plug is screwed into the socket to connect the plug to the socket. Doing pipe fittings are used to connect piping pipes etc.

[0003]

However, in the above-mentioned pipe joint, the degree of tightening of the cap nut differs depending on the individual operator, and even when the same person performs the construction, it varies from place to place. However, it has not always been possible to obtain a stable connection state between the plug and the socket. When the tightening of the cap nut is weak, the cap nut is easily reversed and loosened due to external stress, and the connection between the plug and the socket may rattle or come off.

The present invention has been made in view of the above circumstances, and provides a pipe joint in which a stable connection state can be obtained.

[0005]

A pipe joint according to a first aspect of the present invention comprises a plug having a cylindrical insertion tube projecting from a front end surface and a socket having an insertion opening opening at the front end surface. A pipe joint in which a pipe is inserted into an insertion opening of a socket and the front end faces of the plug and the socket are butted against each other to connect the plug and the socket, and an engaging portion is provided on the front end face of either the plug or the socket. A connecting engagement piece provided at the tip portion is provided in a protruding manner, the connecting engagement piece is fitted into the other front end surface of the plug or socket, and the plug and socket are relatively arranged with the cylindrical insertion tube as a rotation axis. A connecting engagement groove is formed on the concentric circumference of the rotating shaft so that the engaging portion engages with the engaging portion to be prevented from coming off by being rotated, and the connecting engaging piece and the connecting engaging groove are Aside, plug Is provided with a rotation prevention tab on one of the front end faces of the socket, and a fitting hole is provided on the other front end face of the plug or socket. It is characterized in that the rotation preventing tab is fitted into the fitting hole by being prevented from coming off.

According to a second aspect of the present invention, there is provided the pipe joint according to the first aspect, characterized in that handle wings are provided on the outer peripheral portions of the plug and the socket so as to stand upright in a direction perpendicular to the rotation axis. is there.

According to a third aspect of the present invention, there is provided the pipe joint according to the second aspect, wherein the handle blades respectively provided on the plug and the socket relatively move the plug and the socket with the cylindrical insertion tube as a rotation axis. By rotating and engaging and holding the connecting engagement piece in the connecting engagement groove, they are fitted and abutted against each other, and the anti-rotation tab and the fitting hole are respectively the grips of the plug and socket. It is characterized in that it is provided near the tip of the wing.

A pipe joint according to a fourth aspect is the pipe joint according to the third aspect, wherein at least one of the handle blades provided on the plug or the socket is provided with a release lever protruding rearward, When the release lever is pressed, the handle wing having the release lever is bent backward so that the rotation preventing tab is pulled out from the fitting hole.

In the pipe joint according to claim 5 and the pipe joint according to any one of claims 1 to 4, the wall thickness of the groove side wall portion of the coupling engagement groove has a taper, and along the taper, The connection engagement piece moves in the connection engagement groove so that the plug and the socket are brought into pressure contact with each other.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a state before connection of a pipe joint according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state after connection of the pipe joint according to the embodiment shown in FIG. FIG. 3 is a cross-sectional view showing a state after connection of the pipe joint according to the embodiment shown in FIG.

As shown in the drawing, the pipe joint according to the embodiment has a plug 1 having a cylindrical insertion pipe 15 protruding to the front end face.
And a socket 2 having an insertion opening 21 opening at the front end surface, and the cylindrical insertion tube 15 of the plug 1 is connected to the socket 2
The plug 1 and the socket 2 are rotatably inserted in the insertion port 21 and the front ends of the plug 1 and the socket 2 are butted against each other to connect the plug 1 and the socket 2. A packing 16 is provided around the cylindrical insertion tube 15 in a ring shape,
The packing 16 seals a gap between the inserted cylindrical insertion tube 15 and the insertion port 21.

The plug 1 and the socket 2 are provided at the ends of the piping pipes 17 and 25 that are connected to the left and right respectively. On the outer peripheral portion of the plug 1, handle wings 11 that stand upright in the direction perpendicular to the central axis of the cylindrical insertion tube 15 are provided at two symmetrical positions. Similarly, the outer peripheral portion of the socket 2 has an insertion opening. Handle wings 22 that stand in the direction perpendicular to the central axis of 21 are provided at two symmetrical positions.
The front side surface of the handle wing 11 of the plug 1 is flush with the front end surface of the plug 1, and similarly, the front side surface of the handle wing 22 of the socket 2 is flush with the front end surface of the socket 2. Therefore, the handle wing 11 of the plug 1 and the handle wing 2 of the socket 2
2 means that the cylindrical insertion tube 15 of the plug 1 is inserted into the insertion opening 21 of the socket 2 and the ends of the plug 1 and the socket 2 are butted against each other so that the cylindrical insertion tube 15 serves as a rotation axis and the plug 1 is inserted into the socket 2. By rotating them relative to each other, they are matched and abutted. Here, rotating the plug 1 relative to the socket 2 may mean rotating only one of the plug 1 and the socket 2, or rotating both of them. This means that the rotation directions with respect to the socket 2 are the same.

The plug 1 will be described in more detail. On the front side surface of the handle wing 11 of the plug 1, an engaging portion 14a is formed.
A substantially T-shaped coupling engagement piece 14 having a tip is provided in a protruding manner, and a rotation preventing claw 13 is further provided in the vicinity of the tip of the handle wing 11. The anti-rotation claw 13 has a substantially wedge shape having an inclined surface that gradually rises from the front to the rear in the traveling direction when the plug 1 is rotated clockwise relative to the socket 2. Also, the handle wing 11
A release lever 12 is provided so as to project rearward from the tip of the. The handle wing 11 is slightly thinner from the center to the tip, and can be elastically deformed rearward when the release lever 12 is pressed from the tip side of the handle wing 11.
The above-described coupling engagement piece 14, rotation preventing tab 13, and release lever 12 are similarly provided symmetrically with respect to the central portion of the plug 1 in each of the handle wings 11 and 11 provided at two locations. Is.

Next, the socket 2 will be described in more detail. A fitting hole 23 is provided in the front side surface of the handle blade 22 of the socket 2 near the tip of the handle blade 22. The fitting hole 23 inserts the cylindrical insertion tube 15 of the plug 1 into the insertion opening 21 of the socket 2 and abuts the ends of the plug 1 and the socket 2 with each other so that the cylindrical insertion tube 15 serves as a rotating shaft. By rotating clockwise relative to the socket 2, the handle wings 11 and 22 are aligned with each other and the rotation preventing tab 13 is fitted therein. Here, assuming that the clockwise rotation of the plug 1 relative to the socket 2 is the forward rotation, and the counterclockwise rotation thereof is the reverse rotation, the handle wings 11 are elastic along the gentle slope of the anti-rotation claw 13. The anti-rotation claw 13 easily fits into the fitting hole 23, while the anti-rotation claw 13 has a substantially wedge shape. It becomes difficult to pull it out.

At the front end of the socket 2, handle wings 22 are provided.
Is formed with a substantially fan-shaped collar-shaped plate 26 in the reverse rotation direction. The coupling engagement piece 14 of the plug 1 is fitted into the collar-shaped plate 26, and the plug 1 is further rotated in the forward direction to further rotate the coupling engagement piece. A coupling engagement groove 24 is provided in which 14 is slidably moved and the engagement portion 14a is engaged to prevent removal. The coupling engagement groove 24 is formed in an arc shape concentric with the rotary shaft from the handle wing 22 and is a through hole penetrating to the rear side of the collar plate 26. The end of the coupling engagement groove 24 on the side opposite to the handle wing 22 side is the fitting port 24b of the coupling engagement piece 14, and the groove width extends from this fitting port 14b to the end of the handle wing 22 side. Is narrowed, and the engagement portion 14a of the coupling engagement piece 14 serves as a pull-out prevention portion 24a that engages with the rear side hole edge. Further, the flange plate 26 has a taper whose wall thickness gradually increases from the fitting port 24b toward the handle blade 22 side, and the coupling engagement groove 24 also has a similar taper with this taper. . Therefore, when the plug 1 is rotated in the normal direction, the coupling engagement piece 14 fitted from the fitting port 24 b of the coupling engagement groove 24 slides along the taper in which the thickness of the groove side wall portion of the coupling engagement groove 24 gradually increases. As it moves, it is pulled inward of the coupling engagement groove 24, and the front end face of the plug 1 and the front end face of the socket 2 come into firm contact with each other.

The connection operation of the pipe joint according to the embodiment will be described. First, the position of the coupling engagement piece 14 and the position of the fitting inlet 24b of the coupling engagement groove 24 are made to coincide with each other, and the cylindrical insertion pipe of the plug 1 is made. 15 is inserted into the insertion opening 21 of the socket 2 and the front end surfaces of the plug 1 and the socket 2 are butted against each other. Next, when the handle wings 11 and 22 are respectively held by hand and the plug 1 is rotated in the forward direction so that the handle wings 11 and 22 are aligned with each other, the connecting engagement piece 14 fitted in the fitting opening 24b of the connecting engagement groove 24 is removed. The sliding prevention movement portion 24a of the coupling engagement groove 24 is slidably moved to reach the handle wing 22 side, and the rotation prevention tab 13 is fitted into the fitting hole 23, and the connection between the plug 1 and the socket 2 is completed. In this way, the connection between the plug 1 and the socket 2 is always completed when the anti-rotation claw 13 is fitted into the fitting hole 23. There is no difference for each and it becomes stable. Further, the completion of the connecting work between the plug 1 and the socket 2 can be confirmed by a click feeling when the rotation preventing tab 13 is fitted into the fitting hole 23. Further, since the anti-rotation claw 13 and the fitting hole 23 are provided near the tips of the handle wings 11 and 22, respectively, the reverse rotation prevention effect of the anti-rotation claw 13 against the stress acting in the reverse rotation direction becomes large. ing.

On the other hand, when the plug 1 and the socket 2 are separated, the rotation preventing tab 13 is pulled out from the fitting hole 23 by pressing the release lever 12 at the tip of the handle wing 11, and the plug 1 is further removed. By reversely rotating and pulling out the coupling engagement piece 14 from the fitting inlet 24b of the coupling engagement groove 24,
Separation of the plug 1 and the socket 2 is completed.

[0018]

According to the pipe joint of the first aspect of the present invention, the cylindrical insertion pipe of the plug is inserted into the insertion opening of the socket so that the front end faces of the plug and the socket are butted against each other and the connection engagement piece is connected and engaged. The connection engaging piece slides in the connection engaging groove by engaging in the groove and further rotating the plug and the socket with the cylindrical insertion tube as a rotation axis, and the engaging portion of the connection engaging piece. Is engaged and held in the coupling engagement groove, and the plug and the socket are in a coupled state. At this time, the rotation preventing tab is fitted into the fitting hole to restrain the rotation of the plug and the socket, so that the above-mentioned connected state of the plug and the socket is maintained. Therefore, the connection between the plug and the socket is always completed at the position where the anti-rotation tab is fitted into the fitting hole, and the connection state between the plug and the socket becomes constant and stable. In addition, when connecting the plug and socket, insert the plug into the socket and butt the ends of each other, and rotate the plug and socket relative to each other so that the rotation prevention tabs are automatically inserted into the fitting holes. It can be easily performed such as completion, and at this time, the completion of the connection operation can be confirmed by a click feeling when the rotation preventing tab is fitted into the fitting hole.

According to the pipe joint of the second aspect, in addition to the effect of the pipe joint of the first aspect, since the plug and the socket can be rotated with the handle wing, the connection operation can be facilitated.

According to the pipe joint of the third aspect, in addition to the effect of the pipe joint of the second aspect, the rotation preventing tab and the fitting hole are provided near the tips of the handle wings of the plug and the socket, respectively. Since the position of the anti-rotation claw and the fitting hole increases the distance from the rotation axis of the plug and socket, it is possible to withstand a larger stress acting on the connection part of the plug and socket and restrain the rotation of the plug and socket. The reverse rotation prevention effect is increased.

According to the pipe joint of the fourth aspect, in addition to the effect of the pipe joint of the third aspect, pressing the release lever causes the handle wing having the release lever to be bent backward to prevent the rotation. Since the tab is designed to be pulled out from the fitting hole, the plug and the socket can be easily removed by rotating the plug and the socket in reverse while pressing the release lever.

According to the pipe joint of the fifth aspect, in addition to the effect of the pipe joint of any of the first to fourth aspects, the wall thickness of the groove side wall portion of the coupling engagement groove has a taper. Since the connecting engagement piece moves in the connecting engagement groove along the taper so that the plug and the socket are brought into pressure contact with each other, the connection between the plug and the socket becomes more stable without rattling.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state before connection of a pipe joint according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state after the pipe joint according to the embodiment shown in FIG. 1 is connected.

3 is a cross-sectional view showing a state after connection of the pipe joint according to the embodiment shown in FIG.

[Explanation of symbols]

 1 Plug 2 Socket 11 Handle Wing 13 Anti-rotation Claw 14 Connection Engagement Piece 14a Engagement Part 15 Cylindrical Insertion Pipe 21 Insertion Port 22 Handle Wing 23 Fitting Hole 24 In Connection Engagement Groove

Claims (5)

[Claims] 1. A plug having a cylindrical insertion tube protruding to the front end surface and a socket having an insertion opening opening to the front end surface. The cylindrical insertion tube of the plug is inserted into the insertion opening of the socket and the plug and A pipe joint in which the front end surfaces of the sockets are butted against each other to connect the plug and the socket, and a connecting engagement piece having an engaging portion at the tip is provided on the front end surface of either the plug or the socket, and On the other front end face of the plug or socket, the above-mentioned coupling engagement piece is fitted,
Further, a connecting engagement groove is formed on the concentric circumference of the rotary shaft, which is moved by relatively rotating the plug and the socket with the cylindrical insertion tube as the rotary shaft to engage with the engaging portion to prevent the plug from coming off. In addition to the above-mentioned connecting engaging piece and connecting engaging groove, a rotation preventing tab is projected on the front end face of either the plug or the socket, and a fitting hole is formed on the other front end face of the plug or socket. The pipe joint is characterized in that the rotation preventing tab is fitted in the fitting hole by engaging the connection engaging piece in the connection engaging groove to prevent the connection preventing piece from coming off. 2. The pipe joint according to claim 1, wherein the plug and the socket are provided with handle wings standing upright in a direction perpendicular to the rotation axis on the outer peripheral portions of the plug and the socket, respectively. 3. The handle wings provided on the plug and the socket respectively rotate the plug and the socket relative to each other with the cylindrical insertion tube as a rotation axis so that the coupling engagement piece is in the coupling engagement groove. 7. The engagement prevention means is adapted to be matched with each other so as to be abutted against each other, and the rotation preventing claw and the fitting hole are provided in the vicinity of the tip of the handle wing of the plug and the socket, respectively. Two
The listed pipe fittings. 4. A handle wing having the release lever is provided by providing a release lever projecting rearward on at least one tip of the handle wing provided on the plug or the socket, and pressing the release lever. The pipe joint according to claim 3, wherein the anti-rotation tab is bent rearward so as to be pulled out from the fitting hole. 5. The wall thickness of the groove side wall portion of the coupling engagement groove has a taper, and the coupling engagement piece moves in the coupling engagement groove along the taper, and the plug and the socket are pressed against each other. The pipe joint according to any one of claims 1 to 4, characterized in that.