JP6383372B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint, and more particularly, to a pipe joint capable of quickly and easily attaching and detaching a male pipe joint member and a female pipe joint member.

  2. Description of the Related Art Conventionally, a pipe joint composed of a male pipe joint member and a female pipe joint member that makes it possible to quickly attach and detach pipes is known. A female pipe joint member of such a pipe joint, as disclosed in, for example, Patent Document 1, is typically held in a tubular joint body having a fluid passage and in a radially displaceable manner on the joint body. A locking element, a sleeve arranged to be slidable in the front-rear direction on the outer peripheral surface of the joint body, and a spring for biasing the sleeve forward with respect to the joint body. When the sleeve is in the forward position, the locking element is held by the sleeve in a position protruding from the inner peripheral surface of the joint body. When the sleeve is in the rearward position, the locking element is freely displaceable radially outward. When connecting the female pipe fitting member to the male pipe fitting member, the sleeve is displaced to the rear position against the biasing force of the spring and held in the fluid passage of the female pipe fitting member. So that the male fitting member is inserted into Further, when separating the female pipe joint member from the male pipe joint member, the female pipe joint member is moved to the rear position against the biasing force of the spring and held so that the male pipe joint member is Pull away from the mold fitting.

  In the pipe joint disclosed in Patent Document 1, a lock mechanism is provided that prevents the sleeve from being displaced to the rear position. Specifically, the joint body is provided with a protrusion, the sleeve is provided with a notch that is large enough to receive the protrusion, and the circumferential position of the sleeve is aligned with the notch and the protrusion. Only when the sleeve can be pulled backwards. By rotating the sleeve after connection so that the notch is positioned away from the protrusion, the sleeve is accidentally pulled backward in the connected state, and the female pipe fitting member and the male pipe fitting member The connection is not released unexpectedly.

JP 2014-169718 A

  When connecting the female pipe joint member and the male pipe joint member in the conventional pipe joint as described above, the female pipe joint member is used as the male pipe joint member while the sleeve is pulled backward. Must move towards. Since the direction in which the sleeve is pulled is opposite to the direction in which the female pipe joint member is moved, in order to perform such an operation, the joint body is also held while holding the sleeve in a rearward position with respect to the joint body. In the gripped state, the female pipe joint member must be moved and connected to the male pipe joint member, but this operation is difficult with one hand, and if performed with both hands, the male pipe joint There is a possibility that the member cannot be held and the connecting operation cannot be performed quickly and easily.

  In view of the above-described problems of the prior art, the present invention provides a female pipe joint member that can be connected and disconnected more quickly and easily, and the female pipe joint member and the male pipe connected thereto. It aims at providing the pipe joint which consists of a type pipe joint member.

That is, the present invention
A female fitting member removably coupled to a corresponding male fitting member,
A tubular joint body having a fluid passage extending rearward from the front end opening into which the male pipe joint member is inserted;
A locking position for holding the male pipe joint member inserted in the fluid passage projecting inward from the inner peripheral surface of the joint body, held in the joint body so as to be displaceable in the radial direction of the joint body; A locking element that is displaceable between a locking release position that is located outside the locking position and releases the locking to the male pipe joint member;
An intermediate holding position that is disposed on the outer peripheral surface of the joint body, engages the locker from the outside in the radial direction and holds the locker in the lock position, and is positioned forward of the intermediate hold position and the lock Between a front release position that allows a child to be in the unlocking position and a rear release position that is located rearward of the intermediate holding position and that allows the locker to be in the unlocking position, A sleeve that is displaceable in the direction of the longitudinal axis of the joint body;
A spring disposed between the coupling body and the sleeve and biasing the sleeve toward the intermediate holding position;
A female pipe coupling member is provided.

  In the female pipe joint member, the sleeve can be displaced to the unlocking position by moving the sleeve biased toward the intermediate holding position by the spring forward from the intermediate holding position to the forward release position. Thus, connection with the male pipe joint member becomes possible. Therefore, simply by gripping the sleeve and pressing the female pipe fitting member against the male pipe fitting member, the sleeve is displaced forward relative to the fitting main body in contact with the male pipe fitting member. The forward release position is reached, and the female fitting member is connected to the male fitting member. As a result, the difficulty in performing the connecting operation as described above for conventional pipe joints is eliminated, and the connecting operation can be performed more quickly and easily. In addition, when the sleeve is pulled rearward in the connected state, the sleeve is displaced rearward with respect to the joint main body, so that the lock is in the rear release position where the lock can be displaced to the lock release position. The mold fitting member can be detached from the male fitting member. Therefore, while improving the operability at the time of connection as described above, the operability at the time of detachment is equivalent to the conventional pipe joint.

  Preferably, in the intermediate holding position, the sleeve is allowed to move to the rearward release position, and is allowed to move to the frontward release position, but is prevented from moving to the rearward release position. It is possible to turn the joint main body in the circumferential direction between the retracted prevention position.

  Since the sleeve is not displaced to the backward release position by setting the sleeve to the reverse prevention position, the sleeve is erroneously pulled backward by the sleeve being in the reverse prevention position in the connected state, and the connection is released. Is prevented. Further, if the female pipe joint member is connected to the male pipe joint member in the state where the sleeve is set in the retraction prevention position, the connection cannot be released by pulling the sleeve backward when the connection is completed. Therefore, the operation for locking the sleeve after connection, which is necessary in the conventional pipe joint, is not necessary. This reduces the possibility of leaving the sleeve in a locked state, leaving it in a state where it can be pulled back.

In particular,
One of the joint body and the sleeve has a locking projection that protrudes toward the other, and the other has a projection receiving portion that receives the locking projection,
When the sleeve is moved from the intermediate holding position toward the rearward release position in the retractable position, the locking protrusion passes through the protrusion receiving portion and the sleeve is displaced to the backward release position, and the sleeve is When the retraction prevention position is moved from the intermediate holding position toward the rearward release position, the locking projection comes into contact with the other in the direction of the longitudinal axis and the sleeve is displaced to the rearward release position. Can be prevented.

In particular,
The protrusion receiving portion includes a circumferential intermediate passage through which the locking protrusion passes when the sleeve rotates between the retreat allowable position and the retraction preventive position at the intermediate holding position, and the sleeve is allowed to retreat. A longitudinal forward passage extending forward from the circumferential intermediate passage so that the locking projection passes when displaced from the intermediate holding position to the rearward release position in position, and the sleeve in the retracting prevention position A longitudinal rear passage extending rearward from the circumferential intermediate passage so that the locking projection passes when displaced from the intermediate holding position to the front release position;
When the sleeve is moved toward the forward release position in the retractable position, the locking projection comes into contact with the other in the direction of the longitudinal axis in the circumferential intermediate passage so that the sleeve is in the forward release position. It is possible to prevent the displacement up to.

  With this configuration, the sleeve can be displaced only between the intermediate holding position and the rearward release position in the direction of the longitudinal axis when in the retractable position, and the intermediate holding position in the direction of the longitudinal axis when in the retracting prevention position. And displaceable only between the forward release position. When connecting the female pipe fitting member to the male pipe fitting member, it is necessary to set the sleeve to the retraction prevention position. It is possible to more reliably prevent the displacement to the position.

Preferably,
One end of the spring is held to be fixed to the joint body in the circumferential direction, and the other end of the spring is held to be fixed to the sleeve in the circumferential direction. Urging toward a forward and backward stop position between the reverse stop position and the reverse allowance position;
When the sleeve is moved toward the forward release position and the rearward release position in the forward / backward preventing position, the locking projection comes into contact with the other in the direction of the longitudinal axis in the circumferential intermediate passage. It is possible to prevent the sleeve from being displaced to the front release position and the rear release position.

In particular,
The outer peripheral surface of the joint body has a first support surface facing forward, and a second support surface facing rearward at a position in front of the first support surface,
An inner peripheral surface of the sleeve has a third support surface facing forward, and a fourth support surface facing rearward at a position in front of the third support surface;
The spring is set to a position between the first support surface and the second support surface and between the third support surface and the fourth support surface;
When the sleeve is displaced forward from the intermediate holding position, the spring is compressed between the second support surface and the third support surface to urge the sleeve backward against the joint body; When the sleeve is displaced rearward from the intermediate position, the spring is compressed between the first support surface and the fourth support surface to urge the sleeve forward against the joint body. can do.

The present invention also provides
Any one of the female pipe coupling members,
A male fitting member inserted into the fluid passage of the female fitting member and removably coupled to the female fitting member;
A pipe joint is provided.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a female pipe joint member and a pipe joint according to the present invention will be described with reference to the accompanying drawings.

It is an external view in the state before the connection of the pipe joint which concerns on the 1st Embodiment of this invention. It is an external view in the state in the middle of the connection of the pipe joint of FIG. 1A, and is a figure when the sleeve of a female type pipe joint member exists in a front releasing position. It is an external view in the connection state of the pipe joint of FIG. 1A, and is a figure when the sleeve of a female pipe joint member exists in an intermediate | middle holding position and a retraction prevention position. It is an external view in the connection state of the pipe joint of FIG. 1A, and is a figure when the sleeve of a female type pipe joint member exists in an intermediate | middle holding position and a retreat | retreat allowable position. It is an external view in the state in the middle of detachment | leave of the pipe joint of FIG. 1A, and is a figure when the sleeve of a female pipe joint member exists in a back release position. It is sectional drawing in the IIa-IIa line | wire of FIG. It is sectional drawing in the IIb-IIb line | wire of FIG. It is sectional drawing in the IIc-IIc line | wire of FIG. It is sectional drawing in the IId-IId line | wire of FIG. It is sectional drawing in the IIe-IIe line | wire of FIG. It is sectional drawing in the connection state of the pipe joint which concerns on the 2nd Embodiment of this invention, and is a figure when the sleeve of a female type pipe joint member exists in an intermediate | middle holding position and a retraction prevention position. It is sectional drawing in the state in the middle of the connection of the pipe joint of FIG. 3A, and is a figure when the sleeve of a female pipe joint member exists in a front release position and a retraction prevention position. It is sectional drawing in the state in the middle of detachment | leave of the pipe joint of FIG. 3A, and is a figure when the sleeve of a female type pipe joint member exists in a back release position and a retreat | retreat allowable position. It is sectional drawing in the IVa-IVa line | wire of FIG. 3A. It is sectional drawing in the IVc-IVc line | wire of FIG. 3C. It is an external view of the female pipe joint member which concerns on the 3rd Embodiment of this invention. It is sectional drawing in the VI-VI line of the female pipe joint member of FIG.

  As shown in FIGS. 1A to 1E and 2A to 2E, the pipe joint 100 according to the first embodiment of the present invention includes a female pipe joint member 110 and a male pipe joint member 170 that are detachably connected to each other. Consists of.

  As shown in FIG. 2A, the female pipe joint member 110 includes a tubular joint body 118 having a fluid passage 116 extending in the direction of the longitudinal axis L from the front end opening 112 to the rear end opening 114, and the joint body 118. The locking element 122 held in the locking element holding hole 120 formed on the cylindrical body 126, the cylindrical sleeve 126 disposed on the outer peripheral surface 124 of the coupling body 118, and the coupling body 118 and the sleeve 126. Spring 128. The locker 122 is positioned in the locker holding hole 120 so as to protrude inward from the inner peripheral surface 130 of the joint main body 118 (FIGS. 2A, 2C, and 2D), and on the outer side of the lock position. The joint body 118 can be displaced in the radial direction between the lock release position (FIGS. 2B and 2E) that does not protrude from the inner peripheral surface 130 of the joint body 118.

  On the inner peripheral surface 132 of the sleeve 126, a locker support protrusion 134 protruding inward, a front locker receiving part 136 positioned in front of the locker support protrusion 134, and behind the locker support protrusion 134. A rear locking element receiving portion 138 is formed. The sleeve 126 has an intermediate holding position in which the locking element supporting protrusion 134 engages the locking element 122 from the outside in the radial direction to hold the locking element 122 in the locking position (FIGS. 1A, 1C, 1D, 2A, 2C, 2D). A front release position (FIGS. 1B and 2B) that is positioned in front of the intermediate holding position and that accepts the locking element 122 in the rear locking element receiving portion 138 and allows the locking element 122 to be in the unlocking position; Longitudinal axis between the rear release position (FIGS. 1E and 2E) that is positioned rearward of the holding position and that allows the locker 122 to be received by the front locker receiving portion 136 and to allow the locker 122 to be in the unlocked position. It is attached to be displaceable in the direction of L.

  As shown in FIGS. 2A to 2E, a pin (locking protrusion) 140 that protrudes radially outward toward the sleeve 126 is provided on the outer peripheral surface 124 of the joint body 118. Further, as shown in FIGS. 1A to 1E, the sleeve 126 is provided with a notch (projection receiving portion) 142 that is sized to receive the pin 140. The sleeve 126 includes a retraction prevention position (FIGS. 1A to 1C) in which the notch portion 142 is not aligned with the pin 140 in the circumferential direction, and a retreat allowable position (FIG. 1A) in which the notch portion 142 is aligned with the pin 140 in the circumferential direction. 1D-E) is rotatable in the circumferential direction. When the circumferential position of the sleeve 126 is the retraction prevention position, when the sleeve 126 is moved from the intermediate holding position toward the rearward release position, the pin 140 is placed on the rear end surface 144 of the sleeve 126 in the direction of the longitudinal axis L. The contact prevents the sleeve 126 from being displaced to the rear release position. On the other hand, when the circumferential position of the sleeve 126 is in the retreat allowable position, when the sleeve 126 is moved from the intermediate holding position toward the rearward release position, the pin 140 is received by the notch 142 of the sleeve 126 and the notch 142 Passing through, the sleeve 126 is displaced to the rear release position. With such a configuration, as will be described later, it is possible to prevent the sleeve 126 from being erroneously pulled backward in the connected state and being disconnected.

  The outer peripheral surface 124 of the joint body 118 is provided with a first support surface 148 that is formed forward by a step 146 and a second support surface 152 that is formed by a stop ring 150 and faces the rear. . In addition, the inner peripheral surface 132 of the sleeve 126 is provided with a third support surface 156 that is formed forward by a stop ring 154 and a fourth support surface 160 that is formed by a stepped portion 158 and that faces the rear. ing. The spring 128 is disposed at a position between the first support surface 148 and the second support surface 152 of the joint body 118 and between the third support surface 156 and the fourth support surface 160 of the sleeve 126. . Ring-shaped spring support members 162 and 162 are disposed before and after the spring 128, and the spring 128 is connected to the first to fourth support surfaces 148, 152, 156, and 160 through the spring support members 162 and 162, respectively. Engage. With such a configuration, when the sleeve 126 is displaced forward from the intermediate holding position, the spring 128 is compressed between the second support surface 152 of the joint body 118 and the third support surface 156 of the sleeve 126 so that the sleeve 126 is compressed. When the sleeve 126 is urged rearward toward the intermediate holding position and the sleeve 126 is displaced rearward from the intermediate holding position, the spring 128 is interposed between the first support surface 148 of the joint body 118 and the fourth support surface 160 of the sleeve 126. Compressed to urge the sleeve 126 forward toward the intermediate holding position. That is, the sleeve 126 is always urged by the spring 128 toward the intermediate holding position in the direction of the longitudinal axis L.

  The male pipe coupling member 170 has a fluid passage 172 extending in the direction of the longitudinal axis L, and an annular locking element engaging groove 176 provided on the outer peripheral surface 174 thereof.

  When connecting the female pipe fitting member 110 to the male pipe fitting member 170, the sleeve 126 of the female pipe fitting member 110 is held, and the male pipe fitting member 170 opens the front end of the female pipe fitting member 110. The female fitting member 110 is brought closer to the male fitting member 170 so as to be inserted into the fluid passage 116 from 112. At this time, the sleeve 126 is maintained at the intermediate holding position by the spring 128, and the locking element 122 is held at the locking position by the sleeve 126 (FIGS. 1A and 2A). As shown in FIG. 1A, the sleeve 126 preferably has a position in the circumferential direction that is a retraction prevention position. As the male pipe fitting member 170 is inserted, the front end portion 178 of the male pipe fitting member 170 and the lock 122 come into contact with each other, and the male pipe fitting member 170 is further inserted into the female pipe fitting member 110. Insertion is temporarily blocked. When the sleeve 126 is further pushed forward toward the male pipe joint member 170 side, the sleeve 126 is displaced forward with respect to the joint body 118, and when the sleeve 126 is displaced to the forward release position, the lock 122 is rearwardly locked. It is received by the child receiving part 138 and becomes a lock release position. Then, the engagement between the male pipe joint member 170 and the lock 122 in the direction of the longitudinal axis L is released, and the male pipe joint member 170 is further inserted into the fluid passage 116 of the female pipe joint member 110 ( FIG. 1B, FIG. 2B). When the male fitting member 170 is inserted to a position where the locking element engaging groove 176 of the male fitting member 170 is aligned with the locking element 122 in the direction of the longitudinal axis L, the locking element 122 is inserted into the locking element engagement groove. By 176, it can be displaced to the locking position. When the hand is released from the sleeve 126 in this state, the sleeve 126 is displaced rearward by the biasing force of the spring 128 and returns to the intermediate holding position (FIGS. 1C and 2C). The lock 122 is held in the locked position by the sleeve 126 while being engaged with the lock engaging groove 176 of the male pipe joint member 170, whereby the pipe joint 100 is connected to the female pipe joint member 110 and the male pipe. The connection with the joint member 170 is completed. An O-ring 180 is disposed on the inner peripheral surface 130 of the joint main body 118 of the female pipe joint member 110. In the connected state, the O-ring 180 causes the inner peripheral surface 130 of the joint main body 118 and the male pipe joint to be connected. The outer peripheral surface 174 of the member 170 is hermetically engaged.

  When the female pipe joint member 110 is detached from the male pipe joint member 170, first, the sleeve 126 is rotated so that the circumferential position of the sleeve 126 becomes the retreat allowable position (FIGS. 1D and 2D). When the sleeve 126 is gripped and pulled backward while the sleeve 126 is in the retractable position, the joint body 118 of the female pipe joint member 110 is connected to the male pipe joint member 170 via the lock 122. The sleeve 126 is displaced rearward with respect to the joint body 118. When the sleeve 126 is displaced to the rearward release position, the locker 122 is received by the front locker receiving portion 136 and can be displaced to the lock release position, and the locker engaging groove 176 of the male pipe joint member 170 is The engagement with the lock 122 is released, and the female pipe joint member 110 is detached from the male pipe joint member 170 (FIGS. 1E and 2E).

  If the sleeve 126 is set in the backward movement prevention position as shown in FIG. 1A when starting the connection, the sleeve 126 cannot be displaced backward as shown in FIG. 1C when the connection is completed. Accordingly, the sleeve 126 is prevented from retreating without performing an operation of locking the sleeve 126 after the connection, and the connection is prevented from being unexpectedly released due to the sleeve 126 being pulled by mistake.

  As shown in FIGS. 3A-C and FIGS. 4A-B, the female pipe joint member 210 of the pipe joint 200 in the second embodiment of the present invention has a pin 240 as a locking projection disposed on the sleeve 226 side, It differs from the female pipe joint member 110 in the first embodiment in that a chamfered part 242 as a protrusion receiving part is formed on the outer peripheral surface 224 of the joint body 218. In the female pipe joint member 210, the pin 240 is disposed on the sleeve 226 so as to protrude toward the joint body 218. Two chamfered portions 242 are provided on the outer peripheral surface 224 of the joint body 218 at positions that are point-symmetric. As shown in FIGS. 3A, 3B, and 4A, when the sleeve 226 is in the retraction prevention position where the pin 240 of the sleeve 226 and the chamfered portion 242 of the joint body 218 are not aligned in the circumferential direction, the sleeve 226 When the pin 240 is moved backward, the pin 240 comes into contact with the pin locking surface 244 of the joint body 218 in the direction of the longitudinal axis L, and cannot be displaced to the rear release position as shown in FIG. 3C. On the other hand, it can be displaced to the forward release position shown in FIG. 3B. As shown in FIG. 4B, when the sleeve 226 is rotated back to the retractable allowable position where the pin 240 of the sleeve 226 is circumferentially aligned with the chamfered portion 242 of the joint body 218, the sleeve 226 is pulled backward. The pin 240 passes through the chamfered portion 242 without contacting the joint body 218, and the sleeve 226 is displaced to the rearward release position shown in FIG. 3C (the joint body 218 is shown as rotated in FIGS. 3C and 4B). ) The operation of connecting and disconnecting the female pipe joint member 210 and the male pipe joint member 270 in the pipe joint 200 is the same as that of the pipe joint 100 according to the first embodiment.

  As shown in FIGS. 5 and 6, the female pipe coupling member 310 according to the third embodiment of the present invention is the first in that a pin receiving passage 342 as a protrusion receiving portion is formed in the sleeve 326. It differs from the female pipe joint member 110 in the embodiment. As shown in FIG. 5, the pin receiving passage 342 in the female pipe joint member 310 is formed in a circumferential direction formed at a position where the pin 340 provided in the joint body 318 is received when the sleeve 326 is in the intermediate holding position. A circumferential intermediate passage 342a that extends, a longitudinal front passage 342b that extends forward from the lower end position as viewed in the view of the circumferential intermediate passage 342a, and a rearward position from the upper end position as viewed in the view of the circumferential intermediate passage 342a The longitudinal rear passage 342c extends. The sleeve 326 is between a retraction prevention position where the longitudinal rear passage 342c is aligned with the pin 340 in the direction of the longitudinal axis L, and a retreat allowable position where the longitudinal forward passage 342b is aligned with the pin 340 in the direction of the longitudinal axis L. It can rotate in the circumferential direction. When the sleeve 326 is in the retraction prevention position, when the sleeve 326 is moved forward, the pin 340 passes through the longitudinal rear passage 342c, and the sleeve 326 is displaced to the front release position. In the intermediate passage 342a, the sleeve 326 abuts in the direction of the longitudinal axis L, and the sleeve 326 is prevented from being displaced to the rearward release position. On the other hand, when the sleeve 326 is in the retractable position, when the sleeve 326 is moved rearward, the pin 340 passes through the longitudinal front passage 342b, and the sleeve 326 is displaced to the rearward release position. Is abutted against the sleeve 326 in the direction of the longitudinal axis L in the circumferential intermediate passage 342a to prevent the sleeve 326 from being displaced to the forward release position. In the female pipe coupling members 110 and 210 in the first and second embodiments, the sleeves 126 and 226 can be displaced to the front release position without setting the circumferential positions of the sleeves 126 and 226 to the retraction prevention position. Therefore, it is possible to connect the female pipe joint members 110 and 210 by pushing the sleeves 126 and 226 into the male pipe joint members 170 and 270. On the other hand, in the female pipe coupling member 310, the sleeve 326 cannot be displaced to the forward release position unless the sleeve 326 is set in the retreat prevention position. Is a retreat prevention position, and therefore, when the connection is completed, the retreat of the sleeve 326 is always prevented.

  The female pipe joint member 310 is different from the female pipe joint members 110 and 210 in the first and second embodiments also in the configuration of the spring 328 and the portion that holds the spring 328. On the outer peripheral surface 324 of the joint body 318 and the inner peripheral surface 332 of the sleeve 326 in the female pipe joint member 310, spring holding elongated holes 382 and 384 extending in the direction of the longitudinal axis L are provided. The rear end 328a of the spring 328 is bent inward in the radial direction, and is held in a state of being fixed to the joint body 318 in the circumferential direction by the spring holding elongated hole 382 of the joint body 318. Similarly, the front end 328b of the spring 328 is bent radially outward and is held in a state of being fixed to the sleeve 326 in the circumferential direction by a spring holding long hole 384 of the sleeve 326. The spring 328 biases the sleeve 326 in the circumferential direction toward the forward / backward prevention position (FIG. 5) between the reverse prevention position and the reverse allowance position. Therefore, the sleeve 326 is held at the forward / backward preventing position in a state where no external force is applied in the circumferential direction. When the sleeve 326 is displaced rearward with the circumferential position as the allowance for backward movement, the rear end 328a and the front end 328b of the spring 328 are also in the direction of the longitudinal axis L with respect to the corresponding spring holding elongated holes 382 and 384, respectively. Although not displaced, when the sleeve 326 is displaced forward with the circumferential position as the retraction prevention position, the rear end 328a of the spring 328 is displaced relatively forward in the spring holding elongated hole 382 of the joint body 318, The front end 328 b of the spring 328 is displaced relatively rearward in the spring holding slot 384 of the sleeve 326. The rear end 328a of the spring 328 may be held on the sleeve 326 side, and the front end 328b may be held on the joint body 318 side. When the sleeve 326 is in the forward / backward blocking position, the pin 340 contacts the sleeve 326 in the direction of the longitudinal axis L in the circumferential intermediate passage 342a even if the sleeve 326 is moved toward the forward release position and the backward release position. The sleeve 326 is not displaced in either the forward release position or the rear release position. In the first and second embodiments, even if the sleeves 126 and 226 are in the retraction prevention position in the connected state, the sleeves 126 and 226 can be pushed forward to the front release position. Although the disconnection between the pipe joint members 110 and 210 and the male pipe joint members 170 and 270 is not completely prevented, the forward / backward preventing position is set in the sleeve 326 like the female pipe joint member 310. As a result, forward displacement of the sleeve 326 is also prevented, so that erroneous detachment can be prevented more reliably.

  In the female pipe coupling members 110, 210, and 310 according to the present invention, as described above, the sleeves 126, 226, and 326 hold the locking elements 122, 222, and 322 in the locked position, and the intermediate holding position. Is located forward and the locking elements 122, 222 and 322 are displaceable to the unlocking position, and the locking elements 122, 222 and 322 are displaceable to the locking releasing position which is located rearward from the intermediate holding position. It can be displaced between the rear release position. With such a configuration, the female pipe joint member 110, simply by gripping the sleeves 126, 226, 326 and pressing the female pipe joint members 110, 210, 310 against the male pipe joint members 170, 270, 210 and 310 can be connected to the male fitting members 170 and 270. As a result, the difficulty in performing the connecting operation as described above in the conventional pipe joint is eliminated, and the connecting operation can be performed more quickly and easily.

  Further, as in the above embodiment, the sleeves 126, 226, and 326 are configured to be rotatable in the circumferential direction between the retreat allowable position and the retraction preventive position, and the engagement such as the pins 140, 240, and 340 in the above embodiment is performed. If projection receiving portions such as a stop projection, a notch portion 142, a chamfered portion 242 and a pin receiving passage 342 are provided, the connection is completed by performing the connection operation with the sleeves 126, 226, 326 in the retreat prevention position. At this point, the sleeves 126, 226, and 326 cannot be pulled backward, so that after the connection, the locking operation is forgotten and the sleeves 126, 226, and 326 are pulled backward to remain in a state where the connection can be released. Is reduced.

  In the above embodiment, separate columnar pins 140, 240, and 340 are used as the locking protrusions. However, a spherical member may be press-fitted, or the joint main body 118, 218, 318 or The sleeves 126, 226, and 326 may be directly formed as an integral member. The lockers 122, 222, and 322 are not necessarily spherical and may have other shapes. The springs 128, 228, and 328 that bias the sleeves 126, 226, and 326 to the intermediate holding position may be configured by two springs that bias the sleeve forward and springs that bias the sleeve backward. Of course, it is possible to arbitrarily combine the configurations in the embodiments. For example, the chamfered portion 242 as the projection receiving portion in the second embodiment may be configured as the pin receiving passage 342 in the third embodiment. Alternatively, the springs 128 and 228 in the first and second embodiments may be configured to urge the sleeve toward a predetermined position in the circumferential direction as in the spring 328 in the third embodiment. .

Pipe fitting 100; Female pipe fitting member 110; Front end opening 112; Rear end opening 114; Fluid passage 116; Fitting body 118; Locking element holding hole 120; Locking element 122; Outer peripheral surface 124 (of fitting body 118); Spring 128; inner peripheral surface 130 (of coupling body 118); inner peripheral surface 132 (of sleeve 126); locker support projection 134; front locker receiving portion 136; rear locker receiving portion 138; (Projection) 140; notch portion (projection receiving portion) 142; rear end surface 144; stepped portion 146 (of joint body 118); first support surface 148; stop ring 150; second support surface 152; stop ring 154; Step 158; Step 158; Fourth support surface 160; Spring support member 162; Male pipe joint member 170; Fluid passage 172; Outer peripheral surface 174; Front end 178; O-ring 180;
Pipe joint 200; Female pipe joint member 210; Joint body 218; Locker 222; Outer peripheral surface 224; Sleeve 226; Spring 228; Pin 240; Chamfer 242; Pin locking surface 244;
Female pipe joint member 310; joint body 318; lock 322; outer peripheral surface 324 (of joint body 318): sleeve 326; spring 328; front end 328a; rear end 328b; inner peripheral surface 332 (of sleeve 326); A pin receiving passage 342; a circumferential intermediate passage 342a; a longitudinal forward passage 342b; a longitudinal rear passage 342c; spring retaining slots 382, 384;
Longitudinal axis L;

Claims (4)

A female fitting member removably coupled to a corresponding male fitting member,
A tubular joint body having a fluid passage extending rearward from the front end opening into which the male pipe joint member is inserted;
A locking position for holding the male pipe joint member inserted in the fluid passage projecting inward from the inner peripheral surface of the joint body, held in the joint body so as to be displaceable in the radial direction of the joint body; A locking element that is displaceable between a locking release position that is located outside the locking position and releases the locking to the male pipe joint member;
An intermediate holding position that is disposed on the outer peripheral surface of the joint body, engages the locker from the outside in the radial direction and holds the locker in the lock position, and is positioned forward of the intermediate hold position and the lock Between a front release position that allows a child to be in the unlocking position and a rear release position that is located rearward of the intermediate holding position and that allows the locker to be in the unlocking position, A sleeve that is displaceable in the direction of the longitudinal axis of the joint body;
A spring disposed between the coupling body and the sleeve and biasing the sleeve toward the intermediate holding position;
Equipped with a,
In the intermediate holding position, the sleeve is allowed to move to the rearward release position, and the sleeve is allowed to move to the frontward release position but is prevented from moving to the rearward release position. Between the blocking position and rotatable in the circumferential direction of the joint body,
One of the joint body and the sleeve has a locking projection that protrudes toward the other, and the other has a projection receiving portion that receives the locking projection,
The protrusion receiving portion includes a circumferential intermediate passage through which the locking protrusion passes when the sleeve rotates between the retreat allowable position and the retraction preventive position at the intermediate holding position, and the sleeve is allowed to retreat. A longitudinal forward passage extending forward from the circumferential intermediate passage so that the locking projection passes when displaced from the intermediate holding position to the rearward release position in position, and the sleeve in the retracting prevention position A longitudinal rear passage extending rearward from the circumferential intermediate passage so that the locking projection passes when displaced from the intermediate holding position to the front release position;
When the sleeve is moved from the intermediate holding position toward the rearward release position in the retracting prevention position, the locking projection comes into contact with the other in the direction of the longitudinal axis so that the sleeve is in the rearward release position. When the sleeve is moved toward the forward release position in the retractable position, the locking projection abuts the other in the direction of the longitudinal axis in the circumferential intermediate passage. A female fitting member that prevents the sleeve from being displaced to the forward release position . One end of the spring is held to be fixed to the joint body in the circumferential direction, and the other end of the spring is held to be fixed to the sleeve in the circumferential direction. Urging toward a forward and backward stop position between the reverse stop position and the reverse allowance position;
When the sleeve is moved toward the forward release position and the rearward release position in the forward / backward preventing position, the locking projection comes into contact with the other in the direction of the longitudinal axis in the circumferential intermediate passage. The female fitting member according to claim 1 , wherein the sleeve is prevented from being displaced to the front release position and the rear release position. The outer peripheral surface of the joint body has a first support surface facing forward, and a second support surface facing rearward at a position in front of the first support surface,
An inner peripheral surface of the sleeve has a third support surface facing forward, and a fourth support surface facing rearward at a position in front of the third support surface;
The spring is set to a position between the first support surface and the second support surface and between the third support surface and the fourth support surface;
When the sleeve is displaced forward from the intermediate holding position, the spring is compressed between the second support surface and the third support surface to urge the sleeve backward against the joint body; When the sleeve is displaced rearward from the intermediate holding position, the spring is compressed between the first support surface and the fourth support surface to urge the sleeve forward against the joint body. The female pipe joint member according to claim 1 or 2 , wherein The female pipe joint member according to any one of claims 1 to 3 ,
A male fitting member inserted into the fluid passage of the female fitting member and removably coupled to the female fitting member;
A pipe fitting comprising:

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