JP2009281537A - Pipe fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe fitting capable of surely preventing an unexpected disconnection in use, by easily performing disconnection work of a socket and a plug. <P>SOLUTION: A projection part 14d projecting in the axial direction of a lock sleeve 14 is arranged on one end in the axial direction of the lock sleeve 14. Since a groove 14c is arranged so as to adjust a position in the peripheral direction to a locking pin 15 in a position where the locking pin 15 abuts on one end in the peripheral direction of the projection part 14d, the lock sleeve 14 is rotated up to an abutting position of the projection part 14d and the locking pin 15, and the connection of the socket 10 and the plug 20 can be released by moving in the axial direction as it is. Thus, the disconnection work of the socket 10 and the plug 20 can be easily performed even in a dark place and a pipe-complicatedly-arranged place, without conventionally requiring work for aligning the locking pin and the groove of the lock sleeve by means of visual observation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pipe joint for connecting, for example, a high-pressure pipe used in a hydraulic device or the like.

  Conventionally, as this type of pipe joint, a socket connected to one pipe, a plug connected to the other pipe, and an axially movable socket are provided in the socket, and the valve seat on the socket side is provided by a spring. A socket-side valve element that closes the socket-side flow path by press-contacting, and a plug-side flow path that closes the plug-side valve seat by spring contact with the plug-side valve seat. A plug-side valve body, a plurality of balls that are provided on the socket side so as to be movable in the radial direction, and that engage with the engagement portion on the plug side to restrict axial movement of the plug, and an axial direction on the socket side It is provided so as to be movable, restricting movement of each ball in the disengagement direction by moving in one axial direction, and allowing movement in the disengagement direction of each ball by moving in the other axial direction That a Kkusuribu are known (e.g., see Patent Document 1.).

  In this pipe joint, when the lock sleeve is moved in the other axial direction and the plug is inserted into the socket, the valve bodies retreat from the valve seats with their tips abutting each other, and the valve bodies are opened to release the socket and the plug. These flow paths communicate with each other. When the plug is inserted into the socket, each ball engages with the engaging portion of the plug, and when the lock sleeve moves in one axial direction, the movement of each ball in the radially outward direction (disengagement direction) is restricted. The socket and the plug are locked in a coupled state.

By the way, in the pipe joint, by moving the lock sleeve in one axial direction, each ball is restricted from moving in the disengagement direction by the lock sleeve. There is a possibility that the connection between the socket and the plug may be released due to movement in the other axial direction due to contact or vibration. Therefore, a pin that can be locked in the axial direction to the lock sleeve is provided on the outer peripheral surface of the socket, and movement of the lock sleeve in the other axial direction is restricted by locking with the pin, and the pin is placed at a predetermined position in the circumferential direction of the lock sleeve. In order to release the connection between the socket and the plug by accepting a groove, the lock sleeve is rotated to align the groove with the pin so that the lock sleeve can be moved in the other axial direction. (For example, refer to Patent Document 2).
JP 2003-202096 A JP-A-8-178159

  However, in the pipe joint, when releasing the connection between the socket and the plug, it is necessary to visually align the groove of the lock sleeve with the pin. Therefore, in a dark place or a place where piping is complicatedly arranged, the lock sleeve Therefore, there is a problem that it is difficult to perform the operation for releasing the connection between the socket and the plug.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to facilitate the disconnection operation of the socket and the plug and to reliably prevent the accidental disconnection during use. It is to provide a pipe joint that can be used.

  In order to achieve the above object, the present invention is provided with a socket connected to one pipe, a plug connected to the other pipe, a radially movable side on the socket side, and an engagement portion on the plug side. A plurality of balls that restrict the axial movement of the plug by engaging with each other and the socket side are provided so as to be movable in the axial direction, and by moving in one axial direction, each ball can move in the disengagement direction. And a lock sleeve that allows the ball to move in the disengagement direction by moving in the other axial direction. The lock sleeve is rotatably provided in the circumferential direction of the socket body. By aligning the locking part protruding from the socket body with the groove provided at a predetermined position in the circumferential direction at one end in the axial direction, the locking part can be received in the groove and the lock sleeve can be moved in the other axial direction. You In the above-described pipe joint, a protruding portion that protrudes in the axial direction of the lock sleeve is provided at one axial end of the lock sleeve, and the groove is positioned at a position where the locking portion abuts against one circumferential end of the protruding portion. It arrange | positions so that it may align with the circumferential direction.

  As a result, the lock sleeve is rotated to a position where the groove is separated from the engagement portion in the circumferential direction, and the lock sleeve is engaged with the engagement portion to restrict the movement in the axial direction. The sleeve does not move in the axial direction due to external contact or vibration. Further, when the lock sleeve is rotated to a position where one end in the circumferential direction of the protruding portion contacts the locking portion, the groove of the lock sleeve is aligned with the locking portion in the circumferential direction, and the locking portion is grooved at the contact position. The lock sleeve can be moved in the other axial direction.

  According to the present invention, since the lock sleeve does not move in the axial direction due to contact with the outside or vibration during use, accidental disconnection can be reliably prevented. In addition, since the lock sleeve can be rotated to the contact position between the protruding portion and the locking portion and moved in the axial direction as it is, the connection between the socket and the plug can be released. There is no need to visually align the groove of the sleeve, and the connection between the socket and the plug can be easily released even in a dark place or a place where piping is complicatedly arranged.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a partially sectional side view of a pipe joint, FIG. 2 is a partially sectional side view of a socket, and FIG. 3 is a partially sectional side view of a plug. 4 is a front sectional view of the socket, and FIG. 5 is a partial side sectional view showing the operation of the pipe joint.

  This pipe joint includes a socket 10 connected to one pipe (not shown) and a plug 20 connected to the other pipe (not shown). By connecting the socket 10 and the plug 20, a flow path on the socket 10 side is formed. 10a communicates with the flow path 20a on the plug 20 side.

  The socket 10 includes a socket body 11 having a flow path 10a therein, a valve body 12 that opens and closes the flow path 10a of the socket body 11, a plurality of balls 13 provided in the socket body 11 so as to be movable in a radial direction, Each ball 13 includes a lock sleeve 14 that restricts movement of each ball 13 in the radial direction.

  The socket body 11 is formed so that the plug 20 can be inserted on one end side in the axial direction, and a tapered valve seat 11a with which the valve body 12 abuts in the axial direction is provided on the inner peripheral surface on one end side in the axial direction. . A pipe connection part 11 b is provided on the other axial end side of the socket body 11, and the pipe connection part 11 b is formed by a screw part (not shown) formed on the inner peripheral surface of the socket body 11. A plurality of holding holes 11c for holding each ball 13 movably in the radial direction are provided at one end side in the axial direction of the socket body 11 at intervals in the circumferential direction. It is formed so as to penetrate through. Further, a sealing material 11d made of an annular rubber is provided on the inner peripheral surface on one axial end side of the socket body 11, and the space between the socket body 11 and the plug 20 is sealed by the sealing material 11d. . Further, a locking pin 15 as a locking portion for restricting the axial movement of the lock sleeve 14 is provided at a predetermined position in the circumferential direction of the outer peripheral surface of the socket body 11. It is formed so as to protrude in a cylindrical shape from the surface toward the radially outer side.

  The valve body 12 is held in the socket main body 11 so as to be movable in the axial direction via a guide member 12 a, and its tip end is brought into contact with the valve seat 11 a of the socket main body 11. The valve body 12 has a contact surface with the valve seat 11a formed in a tapered shape, and a protruding portion 12b protruding in the axial direction is provided on the tip side thereof. The guide member 12a is fixed to the inner peripheral surface of the socket body 11, and is formed so that a fluid can flow by opening a part of the circumferential direction in the axial direction. A spring 12c that presses the valve body 12 toward the valve seat 11a is attached to the guide member 12a, and the socket-side flow path 10a is closed by pressing the valve body 12 against the valve seat 11a by the spring 12c. ing.

  Each ball 13 is held in the holding hole 11c of the socket body 11 so as to be movable in the radial direction, and a part of the ball 13 protrudes outside or inside the holding hole 11c.

  The lock sleeve 14 is made of a cylindrical member, and is provided on the outer peripheral surface side of the socket body 11 so as to be movable in the axial direction. On the inner peripheral surface of the lock sleeve 14, an annular contact portion 14a capable of contacting each ball 13 in the radial direction is projected, and one end surface in the axial direction of the contact portion 14a is tapered. The lock sleeve 14 is urged in one axial direction by a spring 14b. When the lock sleeve 14 moves in one axial direction, the contact portion 14a comes into contact with each ball 13, and a part of each ball 13 is part of the socket body 11. The balls 13 protrude radially inward from the inner peripheral surface of the ball 13 so that the movement of the balls 13 outward in the radial direction is restricted. Further, when the lock sleeve 14 is moved in the other axial direction, the contact between the contact portion 14a and each ball 13 is released, and each ball 13 can be moved radially outward. The lock sleeve 14 is provided in the socket body 11 so as to be rotatable in the circumferential direction, and a groove 14c capable of receiving the locking pin 15 in the axial direction is provided at one end in the axial direction at a predetermined position in the circumferential direction. Further, at one end in the axial direction of the lock sleeve 14, a protrusion 14 d is formed by protruding a part of the lock sleeve 14 in the circumferential direction. When the lock sleeve 14 is rotated in one circumferential direction, the protrusion 14 d is provided. When the lock sleeve 14 is rotated in the other circumferential direction, the other circumferential end of the projecting portion 14 d comes into contact with the locking pin 15. In this case, the protrusion 14d has the lock sleeve 14 at a predetermined angle θ (180 ° or more and less than 360 °) from a position where one end in the circumferential direction contacts the locking pin 15 to a position where the other circumferential end contacts the locking pin 15. ) To rotate in the circumferential direction. Further, the groove 14c is disposed at a position where the locking pin 15 contacts one end in the circumferential direction of the protruding portion 14d, and the locking sleeve 15 is received in the groove 14c at this contact position, so that the lock sleeve 14 is moved in the other axial direction. Can be moved to. Further, an annular projecting portion 14e projecting in the radial direction is provided on the outer peripheral surface of the lock sleeve 14, and the projecting portion 14e serves as a slip stopper when the lock sleeve 14 is moved in the axial direction. In addition, the outer peripheral surface of the protrusion 14e is provided with two notches 14f in the circumferential direction. For example, dust and foreign matter are clogged between the socket body 11 and the lock sleeve 14, and the lock sleeve 14 is manually rotated. When this becomes difficult, a tool such as a spanner can be locked in each notch 14f and rotated.

  The plug 20 includes a plug body 21 having a flow path 20a therein and a valve body 22 that opens and closes the flow path 20a in the plug body 21.

  The plug body 21 is formed so that one end in the axial direction can be inserted into one end in the axial direction of the socket body 11, and a tapered valve seat in which the valve body 22 abuts in the axial direction on the inner peripheral surface of the one end in the axial direction. 21a is provided. A pipe connecting portion 21 b is provided on the other axial end side of the plug main body 21, and the pipe connecting portion 21 b includes a screw portion (not shown) formed on the inner peripheral surface of the plug main body 21. Further, on the outer peripheral surface of the plug main body 21, concave engagement portions 21c with which the balls 13 are engaged are provided continuously in the circumferential direction.

  The valve body 22 is held in the plug main body 21 so as to be movable in the axial direction via a guide member 22 a, and its distal end is brought into contact with the valve seat 21 a of the plug main body 21. The valve body 22 has a tapered contact surface with the valve seat 21a, and a protruding portion 22b protruding in the axial direction is provided on the tip side. The guide member 22a is fixed to the inner peripheral surface of the plug main body 21 and is formed to allow fluid to flow by opening a part of the circumferential direction in the axial direction, like the guide member 12a of the socket 10. The guide member 22a is provided with a spring 22c that presses the valve body 22 toward the valve seat 21a, and the plug-side flow path 20a is closed by pressing the valve body 22 against the valve seat 21a by the spring 22c. It has become.

  In the pipe joint configured as described above, the lock sleeve 14 is rotated to a position where one end in the circumferential direction of the projecting portion 14d contacts the locking pin 15, and the lock sleeve 14 is moved from one axial direction to the other. When the plug 20 is inserted into the socket 10, the valve bodies 12, 22 retreat from the valve seats 11 a, 21 a with the protrusions 12 b, 22 b at the tips contacting each other, and the valve bodies 12, 22 are opened and the sockets are opened. 10 and the flow paths 10a and 20a of the plug 20 communicate with each other. When the plug 20 is inserted into the socket 10, each ball 13 engages with the engaging portion 21 c of the plug 20, and the lock sleeve 14 moves from the other side in the axial direction to one side, whereby the contact portion 14 a of the lock sleeve 14. Thus, the movement of each ball 13 in the radially outward direction (disengagement direction) is restricted, and the socket 10 and the plug 20 are locked in a coupled state. Here, as shown in FIGS. 4 (a) and 5 (a), when the lock sleeve 14 is rotated to a position where the other circumferential end of the protruding portion 14d contacts the locking pin 15, a groove 14c of the lock sleeve 14 is obtained. Moves from the locking pin 15 to a position away from the locking sleeve 14 in the circumferential direction. As a result, even when the lock sleeve 14 attempts to move to the other axial direction due to contact with the outside, vibration, or the like, one axial end (the portion other than the protruding portion 14d) of the lock sleeve 14 is locked to the locking pin 15. Therefore, the connection between the socket and the plug is not released during use. Further, as shown in FIGS. 4B and 5B, when the lock sleeve 14 is rotated to a position where one end in the circumferential direction of the protruding portion 14d contacts the locking pin 15, the groove 14c of the lock sleeve 14 is engaged. By aligning with the stop pin 15 in the circumferential direction and receiving the locking pin 15 in the groove 14c at this contact position, the lock sleeve 14 can move in the other axial direction. Accordingly, as shown in FIG. 5C, the connection between the socket 10 and the plug 20 is released by operating the lock sleeve 14 and moving it to the other axial direction.

  As described above, according to the present embodiment, the lock sleeve 14 is pivoted to the position where the groove 14c is separated from the latch pin 15 in the circumferential direction, whereby the lock sleeve 14 is latched to the latch pin 15 in the axial direction. Therefore, the lock sleeve 14 does not move in the axial direction due to contact with the outside, vibration, or the like, and it is possible to reliably prevent inadvertent disconnection during use.

  In addition, a protrusion 14d that protrudes in the axial direction of the lock sleeve 14 is provided at one end in the axial direction of the lock sleeve 14, and the locking pin 15 and the locking pin 15 are positioned at a position where the locking pin 15 abuts on one end in the circumferential direction of the protrusion 14d. Since the lock sleeve 14 is arranged so as to be aligned in the circumferential direction, the lock sleeve 14 is rotated to the contact position between the projecting portion 14d and the locking pin 15, and is moved in the axial direction as it is to connect the socket 10 and the plug 20. Can be released. This eliminates the need to visually align the locking pin and the groove of the lock sleeve as in the prior art, and disconnects the socket 10 and the plug 20 even in a dark place or a place where piping is complicatedly arranged. Work can be done easily.

  Furthermore, since the protrusion 14d is formed by protruding a part of the circumferential direction of the lock sleeve 14 in the axial direction, it is not necessary to form the protrusion 14d by a separate part, and the number of parts is not increased. There is an advantage.

  Further, since the protruding portion 14d is formed so that the lock sleeve 14 is rotated by 180 ° or more from a position where one end in the circumferential direction contacts the locking pin 15 to a position where the other circumferential end contacts the locking pin 15. If the locking pin 15 is rotated to a position where it comes into contact with the other circumferential end of the protruding portion 14d, the amount of rotation of the lock sleeve 14 to a position where the locking pin 15 comes into contact with one circumferential end of the protruding portion 14d is set. It can be ensured sufficiently, and the accidental disconnection during use can be more reliably prevented. It should be noted that the rotation angle of the lock sleeve 14 may be any angle of 180 ° or more as long as it is less than 360 °.

The partial cross section side view of the pipe joint which shows one Embodiment of this invention Partial cross-sectional side view of socket Partial cross-sectional side view of plug Front sectional view of socket Partial side sectional view showing the operation of the pipe joint

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Socket, 11 ... Socket main body, 13 ... Ball | bowl, 14 ... Lock sleeve, 14c ... Groove, 14d ... Projection part, 15 ... Locking pin, 20 ... Plug.

Claims (3)

A socket connected to one pipe, a plug connected to the other pipe, and a radial movement on the socket side so that the plug can be moved in the axial direction by engaging with an engagement portion on the plug side. A plurality of balls that regulate the movement of the ball and the socket side are provided so as to be freely movable in the axial direction. And a lock sleeve that enables movement of each ball in the disengagement direction. The lock sleeve is rotatably provided in the circumferential direction of the socket body, and is provided at a predetermined position in the circumferential direction at one axial end of the lock sleeve. In the pipe joint in which the locking portion protruding from the socket body is aligned with the groove so that the locking portion is received in the groove and the lock sleeve can be moved in the other axial direction.
A protruding portion protruding in the axial direction of the lock sleeve is provided at one axial end of the lock sleeve, and the groove is aligned with the locking portion at a position where the locking portion abuts on one circumferential end of the protruding portion. A pipe joint characterized by being arranged as described above. The pipe joint according to claim 1, wherein the protruding portion is formed by protruding a part of a circumferential direction of the lock sleeve in the axial direction. The protruding portion is formed such that the lock sleeve is rotated by 180 ° or more from a position where one end in the circumferential direction abuts against the locking portion to a position where the other end in the circumferential direction abuts against the locking portion. Item 3. A pipe joint according to item 1 or 2.

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