JP2018159461A - Pipe fitting - Google Patents

Abstract

The present invention provides a pipe joint that can be easily attached and detached and can be easily separated even in a fixed state. When connecting, a locking element 124 is displaced to a releasing position along an insertion portion 152 of a male joint member 150 against a biasing force of a retaining ring 126, and a locking recess 154 is formed. The locking element 124 is displaced to the locking position by the urging force of the retaining ring 126 and is fitted to the short shaft part of the locking recess 154. As a result, the male joint member 150 is locked to the female joint member 110 and is connected. When separating, the female joint member 110 and the male joint member 150 are relatively rotated. Then, the contact position between the locking recess 154 and the locking element 124 moves from the short shaft part to the long shaft part, and the locking element 124 is displaced to the release position against the urging force of the retaining ring 126, and the locking is released. The In this state, the male joint member 150 is separated by being pulled out of the female joint member 110. [Selection] Figure 1

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 joint member and a female joint member.

  Conventionally, a pipe joint composed of a male joint member and a female joint member that enables quick attachment and detachment of pipes is known. The female joint member of such a pipe joint is, for example, as disclosed in Patent Document 1, a female joint body in which a receiving portion for receiving a male joint member and a locker hole penetrating in the radial direction are formed. Locking element, female joint that can be displaced between a locking position that is radially displaceable in the locking element hole and that is partially inserted into the receiving portion and a release position that is displaced outward from the locking position The sleeve has a sleeve that is slidable in the front-rear direction on the outer peripheral surface of the main body, and a spring that biases the sleeve forward with respect to the female joint main body. The male joint member receives the female joint member. An insertion part to be inserted into the part, and a male joint body having a locking recess for receiving the locking element and locking the insertion part in the receiving part. When connecting the female joint member and the male joint member, the sleeve is displaced to the rear position against the urging force of the spring and held in the male joint body in the receiving portion of the female joint body. Insert the fitting body. When separating the female joint member and the male joint member, the sleeve is displaced to the rear position against the urging force of the spring and is held in the male joint body from the receiving portion of the female joint body. Pull out the fitting body.

JP 2006-316983 A

  However, in such a pipe joint, the gap between the sleeve and the sliding portion of the outer peripheral surface of the female joint body, the gap between the lock element and the lock element hole, and the female joint body and the male joint body In some cases, foreign matter may be caught in the gap, or the fluid may enter the gap and oxidize or dry and become stuck. In particular, since the gap between the sleeve and the sliding portion of the outer peripheral surface of the female joint body is narrow, the sleeve is easily fixed, and the sleeve may not be able to move in combination with the urging force of the spring.

  An object of the present invention is to provide a pipe joint that can be easily attached and detached and can be easily separated even in a fixed state.

That is, the present invention is a pipe joint comprising a female joint member and a male joint member detachably connected to the female joint member,
The female joint member includes a receiving portion having a cylindrical inner peripheral surface for receiving the male joint member, and a lock hole formed so as to penetrate the inner peripheral surface from the outer peripheral surface in the radial direction. A female joint main body having a female joint body disposed in the locking element hole, and being displaceable in a radial direction between a locking position in which a part is inserted into the receiving portion and a release position displaced outward from the locking position; A locking element, and an elastic member for urging the locking element toward the locking position,
The male joint member has a cross-sectional shape having an insertion portion inserted into the receiving portion of the female joint member, a short shaft portion, and a long shaft portion, and the length of the long shaft portion is The short shaft portion has a length equal to or greater than the diameter of the insertion portion and less than the diameter of the insertion portion, and has a locking recess on the outer peripheral surface for receiving the locking element and locking the insertion portion in the receiving portion. A male joint body,
When the insertion part of the male joint member is inserted into the receiving part of the female joint member, the locking position of the locking element against the urging force of the elastic member is increased along the insertion part. When the locking recess is aligned with the locking element, the locking element is displaced to the locking position by the urging force of the elastic member and is fitted to the short shaft portion of the locking recess. The male joint member is locked to the female joint member to be connected,
When the female joint member and the male joint member are relatively rotated in the connected state, the contact position between the locking recess and the locking element moves from the short shaft portion to the long shaft portion. A tube in which the locking between the female joint body and the male joint body is released by displacing the locking element to the release position against the urging force of the elastic member. Provide fittings.

  In this pipe joint, the sliding part between parts is reduced by not using a sleeve that slides in the front-rear direction, and it is fixed rather than sliding in the front-rear direction by a structure that releases the lock by rotating. It is easy to peel off, and furthermore, since the locking recess acts like a cam, it is possible to apply a force radially outward to the locking element, so that there is a gap between the female joint body and the male joint body Even when the gap between the locking element and the locking element hole is fixed, it is easy to release the locking.

  Specifically, the male joint member has an anti-rotation groove formed at a position adjacent to the short shaft portion of the locking recess on the insertion portion, and the locking element includes the anti-rotation groove. The anti-rotation step formed at the contact position can be provided, and in the connected state, the anti-rotation step can be fitted into the anti-rotation groove.

  With such a configuration, it is possible to prevent the lock from being released when a rotational force is unexpectedly applied to the female joint member and the male joint member.

  More specifically, the locking element has a protrusion formed at a position in contact with the locking recess, and the male joint member straddles the long shaft portion of the locking recess from the insertion portion. When the female joint member and the male joint member are relatively rotated in the connected state and the locking element is displaced to the release position, The groove portion can be fitted.

  With such a configuration, the lock can be easily released even when the operator is not visually recognizing the hand.

  More specifically, the locking element and the elastic member can be an integral member.

  Since the number of parts can be reduced by such a configuration, the assemblability can be improved.

  More specifically, the locking element has a gap groove formed at an interval in a portion in contact with the locking recess and the locking hole, and a contact portion between the locking element and the locking recess. The area and the area of the contact portion between the locking element and the locking element hole can be reduced.

  With such a configuration, the area of the contact portion that causes sticking can be reduced, so that unlocking in the sticking state is easier to perform.

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

It is a sectional side view in the state before the connection of the pipe joint which concerns on the 1st Embodiment of this invention. It is a perspective view of the pipe joint of FIG. It is a sectional side view in the connection state of the pipe joint of Drawing 1, and is a figure when a lock child is in a lock position. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 (internal parts are omitted). It is a sectional side view in the state in the middle of separation of the pipe joint of Drawing 1, and is a figure when a lock child is in a release position. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5 (internal parts are omitted). It is a sectional side view in the connection state of the pipe joint which concerns on the 2nd Embodiment of this invention. It is a perspective view of the male coupling member of FIG. It is a perspective view of the locker of FIG. It is a perspective view of the male coupling member which concerns on the 3rd Embodiment of this invention. It is a perspective view of the locker of the pipe joint which concerns on the 3rd Embodiment of this invention.

  As shown in FIGS. 1 and 2, the pipe joint 100 according to the first embodiment of the present invention includes a female joint member 110 and a male joint member 150 detachably connected to the female joint member 110. Become.

  The female joint member 110 has a cylindrical female joint main body 114 having a through hole 112 extending in the front-rear direction as a whole. The female joint body 114 is formed so as to penetrate the radial direction from the outer peripheral surface 120 to the inner peripheral surface 116, and a receiving portion 118 having a cylindrical inner peripheral surface 116 that receives the insertion portion 152 of the male joint member 150. The locking element hole 122 is provided. A locking element 124 is provided in the locking element hole 122, the locking element 124 can be displaced in the radial direction in the locking element hole 122, and a locking position where a part is inserted into the receiving portion 118, and a locking position It is possible to displace in the radial direction between the release position displaced outward. Further, a retaining ring 126 is provided as an elastic member that urges the locking element 124 toward the locking position.

  A valve 130 that is displaceable in the direction of the axis L of the through hole 112 is supported by a valve support member 128 in the through hole 112 of the female joint member 110. The valve 130 is pressed against the valve seat 134 by a compression coil spring 132 and is sealingly engaged.

  The male joint member 150 includes a male joint body 158 in which an insertion portion 152 inserted into the receiving portion 118 of the female joint member 110 and a locking recess 154 that receives the locking element 124 are provided on the outer peripheral surface 156. The locking recess 154 has an elliptical cross-sectional shape with a short shaft portion 160 formed with a length less than the diameter of the insertion portion 152 and a long shaft portion 162 formed with a length equivalent to the diameter of the insertion portion 152. doing. When the locking recess 154 receives the locking element 124 at the short shaft portion 160, the insertion portion 152 is locked in the receiving portion 118. The male joint body 158 has a through hole 164 extending in the front-rear direction, and a valve support member 166, a valve 168, a compression coil spring 170, and a valve seat 172, which are the same as the female joint member 110, are placed in the through hole 164. I have.

  When the female joint member 110 is connected to the male joint member 150, the insertion part 152 of the male joint member 150 is inserted into the receiving part 118 of the female joint member 110. When the locking element 124 is displaced to the release position against the urging force of the retaining ring 126 along the insertion part 152 of the male joint member 150, and the locking recess 154 is aligned with the locking element 124, the locking element 124 is obtained. Is displaced to the locking position by the urging force of the retaining ring 126 and is fitted to the short shaft portion 160 of the locking recess 154. As a result, the male joint member 150 is locked to the female joint member 110 and is in a connected state as shown in FIGS. 3 and 4.

  When the female joint member 110 is separated from the male joint member 150, as shown in FIGS. 5 and 6, the female joint member 110 and the male joint member 150 are relatively rotated in the connected state. . Then, the contact position between the locking recess 154 and the locking element 124 moves from the short shaft part 160 to the long shaft part 162, and the locking element 124 is displaced to the release position against the urging force of the retaining ring 126. As a result, the locking between the female joint member 110 and the male joint member 150 is released, and in this state, the male joint member 150 is separated by being pulled out of the female joint member 110.

  In the present invention, as described above, a sliding portion between components can be reduced by using a structure that does not use a sleeve that slides in the front-rear direction, which is conventionally required. Further, by adopting a structure in which the locking is released by rotating, it is easier to peel off than sliding in the front-rear direction, and the locking recess 154 functions like a cam so that the locking element 124 can be moved in the radial direction. An outward force can be applied. Accordingly, even when the gap between the female joint body 114 and the male joint body 158 or the gap between the lock 124 and the lock hole 122 is fixed, the lock can be easily released.

  As shown in FIG. 7, the pipe joint 200 according to the second embodiment of the present invention includes a female joint member 210 and a male joint member 250 detachably connected to the female joint member 210.

  As shown in FIGS. 8 and 9, the male joint member 250 has an anti-rotation groove 274 formed at a position adjacent to the short shaft portion 260 of the locking recess 254 on the insertion portion, and the locking element 224. Has an anti-rotation step 236 formed at a position in contact with the anti-rotation groove 274.

  As shown in FIG. 7, in the connected state, the anti-rotation step 236 is fitted in the anti-rotation groove 274 so that the male joint member 250 cannot rotate with respect to the female joint member 210. At the time of separation, the male joint member 250 is pushed in the insertion direction, the rotation prevention groove 274 and the rotation prevention step 236 are disengaged, and then rotated to separate.

  In the connected state, the anti-rotation step 236 is fitted in the anti-rotation groove 274, so that it is possible to prevent unexpected unlocking when a rotational force is applied unexpectedly, thus improving safety. be able to. In addition, in the pipe joint which concerns on the 2nd Embodiment of this invention, you may make it provide a rotation prevention groove | channel in a locking element, and provide a rotation prevention step in a male coupling main body.

  As shown in FIGS. 10 and 11, the male joint member 350 and the lock 324 in the pipe joint according to the third embodiment of the present invention are protrusions formed at positions where the lock 324 is in contact with the locking recess 354. The male joint member 350 has a groove portion 376 formed so as to straddle the long shaft portion 362 of the locking recess 354 from the insertion portion 352.

  In the connected state, when the female joint member and the male joint member 350 are relatively rotated, and the lock 324 is displaced to the release position, the protrusion 336 and the groove 376 are fitted, The position is aligned at the release position, which assists the separation work. In addition, it is possible for the operator to easily recognize that the click feeling is obtained and the release position is reached. Therefore, even when the operator is not visually recognizing the hand, the lock is easily released. Moreover, you may make the relationship between a projection part and a groove part reverse similarly to the pipe joint which concerns on the 2nd Embodiment of this invention.

  In the pipe joint according to the present invention described above, the locker and the retaining ring as the elastic member are configured as separate parts. However, these members are integrally formed using a member that undergoes elastic deformation such as sheet metal or resin. It is good also as a member.

  Moreover, in the pipe joint according to the present invention described above, a large number of gap grooves are provided in the contact portion between the locking element and the locking recess, which cause sticking, and the contact part between the locking element and the locking element hole, thereby reducing the contact area. You may make it easy to isolate | separate. The clearance groove should just exist in at least one of the contact part of a locking element and a locking recessed part, and at least one of the contact part of a locking element and a locking element hole.

Pipe joint 100; Female joint member 110; Through hole 112; Female joint main body 114; Inner peripheral surface 116; Receiving portion 118; Outer peripheral surface 120; Locker hole 122; Locker 124; Retaining ring 126; Valve 130; compression coil spring 132; valve seat 134; male joint member 150; insertion section 152; locking recess 154; outer peripheral surface 156; male joint body 158; short shaft section 160; long shaft section 162; Valve support member 166; Valve 168; Compression coil spring 170; Valve seat 172; Pipe joint 200; Female joint member 210; Locking element 224; Anti-rotation stage 236; Male joint member 250; Insertion part 252; Shaft portion 260; Anti-rotation groove 274; Locking element 324; Projection portion 336; Male joint member 350; Insertion portion 352; Locking recess portion 354; 362; the groove 376;

Claims (5)

A pipe joint comprising a female joint member and a male joint member detachably connected to the female joint member,
The female joint member is:
A female joint main body having a receiving portion having a cylindrical inner peripheral surface for receiving the male joint member, and a locking element hole formed so as to penetrate from the outer peripheral surface to the inner peripheral surface in the radial direction;
A lock element that is disposed in the lock hole and is radially displaceable between a lock position in which a part is inserted into the receiving portion and a release position that is displaced outward from the lock position; and ,
An elastic member for urging the locking element toward the locking position;
Have
The male joint member is:
The female joint member has an insertion portion to be inserted into the receiving portion, a short shaft portion and a long shaft portion having a cross-sectional shape, and the length of the long shaft portion is equal to or greater than the diameter of the insertion portion. A male joint body having a length of the short shaft portion less than the diameter of the insertion portion and having a locking recess for receiving the locking element and locking the insertion portion in the receiving portion on the outer peripheral surface;
Have
When the insertion part of the male joint member is inserted into the receiving part of the female joint member, the locking position of the locking element against the urging force of the elastic member is increased along the insertion part. When the locking recess becomes a position aligned with the locking element, the locking element is displaced to the locking position by the urging force of the elastic member and is fitted to the short shaft portion of the locking recess. The male joint member is locked to the female joint member to be connected,
When the female joint member and the male joint member are relatively rotated in the connected state, the contact position between the locking recess and the locking element moves from the short shaft portion to the long shaft portion. The lock between the female joint body and the male joint body is released by displacing the locking element to the release position while resisting the biasing force of the elastic member. Pipe fittings. The male joint member has an anti-rotation groove formed at a position adjacent to the short shaft portion of the locking recess on the insertion portion;
The locking element has an anti-rotation step formed at a position in contact with the anti-rotation groove;
In the connected state, the rotation prevention step is fitted into the rotation prevention groove.
The pipe joint according to claim 1. The locking element has a protrusion formed at a position in contact with the locking recess;
The male joint member has a groove portion formed so as to straddle the long shaft portion of the locking recess from the insertion portion;
When the female joint member and the male joint member are relatively rotated in the connected state, and the locking element is displaced to the release position, the protrusion and the groove are fitted. The
The pipe joint according to claim 1 or 2. The locking element and the elastic member are integrated.
The pipe joint according to any one of claims 1 to 3. The locking element has a gap groove formed at an interval in a portion contacting the locking recess and the locking hole, and an area of a contact portion between the locking element and the locking recess, and the locking The contact area between the child and the locking child hole is reduced,
The pipe joint according to any one of claims 1 to 4.

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