JP2005308008A - Female joint member for pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a female joint member of a new structure enabling one touch connection. <P>SOLUTION: The female joint member 10 includes a male joint member socket part 28 and a locking element 40 set in the socket part displacably in a radial direction. A male joint member is connected and fixed by engaging the locking element 40 with a locking element socket recess part 12-2 of the male joint member 12. The locking element is displaced by a locking element pushing member 44 between engagement position with the recess part 12-2 and non-engagement position where the locking element is released from the recess part. A fixing element 50 retains the locking element pushing member 44 at an unlock position, and the lock is released when the male joint member is inserted until a position where the locking element socket recess part 12-2 receives the locking element. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe joint, and more particularly to a female joint member (socket) in a pipe joint.

  In a pipe joint of a type consisting of a female joint member and a male joint member (plug) inserted and connected to the female joint member, both joint members are simply inserted into the female joint member. There is a so-called one-touch type pipe joint that is connected and fixed (Patent Document 1).

  This one-touch type pipe joint is generally configured as follows. The female joint member ("Socket 1" in Patent Document 1) has a tubular joint body ("Socket body 2"). The joint body has a male joint member receiving portion that receives a male joint member ("plug 26"). A hole is provided in the peripheral wall of the male joint member receiving portion, and a lock (“lock 7”) is set in the hole so as to be displaceable in the radial direction, and a part of the lock is formed on the inner surface of the peripheral wall. It is movable between a radially inner position that protrudes inward from the inside and a radially outer position that does not protrude from the inner surface of the peripheral wall. A cylindrical locker support member (“collar 8”) is displaceable in the axial direction of the joint body on the inside of the peripheral wall of the male joint member receiving portion, and supports the locker from the inside. The locking element is movable between a forward position for setting the locking element in the radially outer position and a retracted position for releasing the support of the locking element, and is biased from the retracted position toward the advanced position by a coil spring. A locking element pressing member (“sleeve”) is provided around the male joint member receiving portion, and the locking element is engaged with the locking element to press the locking element to the radially inner position, and the locking element. It is possible to displace between the retracted position which releases the pressing to allow the locker to reach the radially outer position. The locking element pressing member is urged from a retracted position to an advanced position by a coil spring, and the coil spring has a stronger spring force than the coil spring that urges the locking element support member, so that the locking element is surely secured. It can be held in the locked position.

  In this pipe joint, when the male joint member and the female joint member are not connected, the lock member pressing member in the female joint member is set to the retracted position, and the lock element supporting member is set to the advanced position. Is the radially outer position. When the male joint member is inserted into the female joint member in this state, the male joint member is inserted while retracting the locker support member against the coil spring at the tip, and is inserted for a predetermined length. And the locking element receiving recess ("engagement groove 27") formed on the outer peripheral surface of the male joint member are aligned with the locking element, and the locking element pressing member is moved to the advanced position by the coil spring, and the locking element Is fixed in a state of being fitted into the lock receiving recess. The male joint member can be pulled out of the female joint member by retracting the lock pressing member.

JP 2001-41381 A

  As described above, the female joint member in the conventional one-touch type pipe joint is configured so that, in a state where the male joint member is not inserted, the lock element is supported from the radially inner side by the lock element support member. When the male joint member is completely inserted into the female joint member, the support by the lock support member is released and the lock is pressed to the radially inner position by the lock pressing member. Then, the male joint member and the female joint member are connected and fixed by being fitted into the lock receiving recess of the male joint member.

  It is an object of the present invention to provide a female joint member in a pipe joint having a novel configuration in which the lock operation is performed in a completely different manner from the lock operation in such a conventional female joint member. To do.

That is, the present invention
A female joint member adapted to be coupled to a male joint member,
A male joint member receiving portion adapted to receive the male joint member, and a fluid passage communicating with the fluid passage of the male joint member received in the male joint member receiving portion, A joint body provided with a radial hole in the joint member receiving portion;
A lock provided in the radial hole,
In order to prevent the male joint member from slipping out of the male joint member receiving portion by fitting into the lock receiving recess formed on the outer peripheral surface of the male joint member inserted into the male joint member receiving portion. Mating position,
A non-fitting that is located radially outward from the fitting position and allows the male joint member to be released from the male joint member receiving portion when the male joint member is released from fitting into the lock receiving recess. A lock that is displaceable between the joint positions;
A locking element pressing member attached to the outside of the male joint member receiving portion,
A locking position for pressing the locking element into the fitting position;
A locking element pressing member that is displaceable between unlocking positions that allow the locking element to move to a non-fitting position;
A stator that engages with the locking element pressing member to hold the locking element pressing member in the unlocked position and allows the locking element pressing member to move to the locking position by being detached from the locking element pressing member. When,
A stator support member for supporting the stator provided in the male joint member receiving portion from the inside in the radial direction,
A retracted position moved rearward by the male joint member inserted into the male joint member receiving portion until the locking element receiving recess of the male joint member is in a position to receive the lock;
A stator support member displaceable between a forward position closer to the locking member than the retracted position;
A first biasing member that biases the stator support member toward the forward movement position,
When the stator support member is in the advanced position, the stator is engaged with a locker pressing member in the unlocked position to hold the locker pressing member in the unlocked position, and When the female is moved backward from the position to reach the retracted position, the stator is detached from the lock pressing member, and the lock pressing member is allowed to move to the locking position. A mold coupling member is provided.

  When this female joint member is connected to the male joint member, the male joint member receiving portion of the female joint member is aligned with the male joint member in the axial direction and pushed toward the male joint member. The stator support member is displaced from the forward movement position to the backward movement position by the male joint member inserted into the female joint member, and the stator is disengaged from the lock element pressing member, so that the lock element pressing member is unlocked. It can be displaced from the position to the locking position, and can be connected and fixed with the male joint member.

Specifically, the stator is spherical, and the locking element pressing member has a stator receiving recess for receiving the spherical stator at the unlocked position,
When the stator support member is in the advanced position, the stator support member engages with the stator and pushes the stator into the stator receiving recess (the “large diameter portion” in the embodiments described below). When,
An inclined surface that is inclined radially inward and forward from the pushing surface;
When the stator support member is moved backward from the advance position, the inclined surface supports the stator, and the stator is inclined as the stator support member moves toward the retract position. When the stator support member reaches the retracted position when it is displaced radially inward along the surface, the stator is removed from the stator receiving recess, and the lock pressing member is moved toward the lock position. Can be made possible.

  The female joint member according to the present invention may be provided with a handle that is fixed to the lock member pressing member and includes a grip that can be gripped by an operator at a rear position of the female joint member. it can.

  Furthermore, a second urging member for urging the locking member pressing member from the unlocked position to the locking position is provided, and when the stator supporting member reaches the retracted position and the stator is detached from the locking member pressing member. The second urging member may move the lock pressing member from the unlocked position to the locked position.

  As described above, the female joint member according to the present invention does not require the locker support member, which is the main component of the conventional female joint member of the one-touch type pipe joint, and has a completely new configuration and is a one-touch. The present invention provides a pipe joint that enables a connecting operation of a formula, and has the following excellent effects as compared with a conventional female joint member.

  In the conventional pipe joint, when inserting the male joint member into the female joint member, if the lock support member is inserted to a position where the lock support member is detached from the lock and then pulled out for some reason, the lock support member Before the locking member pressing member is advanced by the coil spring, the locking member is locked to the male joint member before reaching the position where the locking member support member supports the locking member. The case where it pushes into the position for fitting with a child receiving recessed part arises.

  Such a state causes the following problems, for example. That is, the locking element pressing member is related to the open / close valve in the female joint member, and when the male joint member is normally in the retracted position indicating that it is not connected, the open / close valve cannot be opened. To prevent the operator from opening the on-off valve accidentally and to allow the on-off valve to be opened only when it is in the forward position, usually indicating that the male joint member is connected There is. In particular, such a safety mechanism is often employed when handling a high-pressure fluid. In such a pipe joint, as described above, when the locking element pressing member is not scheduled (that is, when the connection with the male joint member is not made), the forward position is reached. Since the open / close valve can be opened, an operator may open the open / close valve by mistake.

  In the pipe joint including the female joint member according to the present invention, the lock pressing member is moved by the stator different from the lock until the lock receiving recess of the male joint reaches the position for receiving the lock. Since the male joint member has passed through the lock member after the male joint member has passed through the lock member, even if the male joint member is suddenly pulled out of the female joint member, the lock member pressing member is in the lock position. It does not move forward, and therefore does not cause the above problems that have occurred in conventional pipe fittings.

  In addition, an inclined surface is provided on the surface of the stator support member that supports the stator, and as the stator support member is retracted by the male joint member, the stator is gradually displaced in the radial direction and finally locked. By disengaging from the child pressing member, the stator can be surely removed from the locking member pressing member in a stable state. That is, without providing such an inclined surface on the surface that supports the stator, a pushing surface having a large diameter for pushing the stator into the stator receiving recess of the locking member pressing member, and the stator receiving the stator In the case of a configuration in which the small-diameter surface is connected stepwise to enable it to be removed from the recess, the time when the spherical locking member is displaced from the large-diameter portion to the small-diameter portion is stable. It may not be possible. This is due to the urging force of the urging means that urges the locking member pressing member that presses the stator inward in the radial direction and the stator support member that supports the stator from inside in the radial direction. This is because the displacement operation may be affected. In the present invention, such a problem can be solved.

Hereinafter, an embodiment of a female joint member of a pipe joint according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a pipe joint 16 including a female joint member 10 according to the present invention and a male joint member 12 inserted and connected to the female joint member.

  The female joint member 10 has a cylindrical joint body 18, and the joint body 18 is screwed to the adapter 20 to which the pipe T is connected from the left side in FIG. A central tubular member 26 to which a spherical valve 24 for opening and closing the fluid passage 22 in the joint member is attached, and a front tubular member 30 which is screwed to the central tubular member 26 and constitutes the male joint member receiving portion 28. Consists of.

  The front tubular member 30 has a poppet-type valve 32 that is displaced rearward by the inserted male joint member 12 to open the fluid passage 22, and is inserted into the male joint member receiving portion 28. And a fixed connecting means 34 for fixedly connecting the male joint member. The fixed connecting means 34 has a spherical locking element 40 set in a radial hole 36 formed in the front cylindrical portion 30, and the outer peripheral surface 12-1 of the inserted male joint member 12. The male joint member is fixed by fitting the locking element into a locking element receiving recess 12 (groove formed in an annular shape in the illustrated example) 12-2.

  Specifically, the fixed connecting means 34 has a locker pressing member 44 which is set on the outer peripheral surface of the front cylindrical member 30 and is slidable in the axial direction. The locking element 40 is fitted in the locking element receiving portion 12-2 of the male joint member 12 without projecting to the inside of the inner peripheral surface 30-1 of the front cylindrical member 30 (see FIG. 1). A rear position (unlocked position) in the axial direction for allowing a non-fitted position), and the locking element 40 is displaced radially inward from the non-fitted position and the front tubular member 30 for projecting to the inside of the inner peripheral surface 30-1 and pressing it to the radially inner position (fitting position) shown in FIG. 4 for fitting into the lock receiving recess 12-2 of the male joint member 12. It is possible to displace between the axial front position (locking position).

  The fixed connecting means 34 further includes a stator 50 for fixing the locker pressing member 44 in the unlocked position and an axial direction in the front tubular member 30 for supporting the stator 50 from the inside in the radial direction. The stator support member 52 is set so as to be displaceable.

  As shown in FIG. 1, the stator 50 is fitted into a stator receiving recess 44-1 formed on the inner peripheral surface of the lock pressing member 44, and the lock pressing member 44 is unlocked as illustrated. It is possible to move the locking element pressing member 44 to the locking position (Fig. 4) forward in the axial direction by moving to the inside in the radial direction from the fixing position and detaching from the stator receiving recess 44-1. The stator support member 52 supports the stator so as to determine the position of the stator 50 in the radial direction. That is, the stator support member 52 includes a large-diameter portion 52-1 that supports the stator 52 at the fixed position, and an inclined surface 52- that gradually inclines from the large-diameter portion forward in the axial direction and radially inward. 2 and a small diameter portion 52-3 following the inclined surface. As shown in FIG. 2, when the male joint member 12 is inserted into the male joint member receiving portion 28, the male joint member 12 passes through the lock 40 and contacts the poppet-shaped valve 32. It moves rearward in the axial direction, and then comes into contact with the stator support member 52 to displace the stator support member 52 along with the valve 32 rearward in the axial direction. The stator support member 52 retreated by the male joint member 12 initially supports the stator 50 by the large-diameter portion 52-1 (FIG. 2), but is fixed on the inclined surface 52-2 as the retreat proceeds. Thus, the stator 50 is gradually displaced inward in the radial direction, and the locking element receiving recess 12-2 of the male joint member 12 is in a position where the locking element 40 can be received (FIG. 3). The stator 50 comes off the stator receiving recess of the lock pressing member 44. When the stator 50 is disengaged, the locking element pressing member 44 is displaced to the locking position forward in the axial direction by the coil spring 60 (FIG. 4), and the locking element 40 is fitted into the locking element receiving recess 12-2 of the male joint member 12. Then, the male joint member 12 is fixed to the female joint member 10. At this point, the poppet valve 32 is in a state of opening the fluid passage 22 of the female joint member.

  As shown in FIGS. 1 and 5, a handle 62 for an operator to grip and operate the female joint member 10 is attached to the locker pressing member 44. That is, a cylindrical connecting member 64 is fixed to the outer periphery of the locking element pressing member 44 and extends rearward. A rear end 64-1 having a truncated cone shape has a pair of rearward extending portions from the left and right sides thereof. Connecting members 66 and 68 are attached, and the connecting members 66 and 68 have grips 70 and 72 (in FIG. 1, C-shaped as viewed in FIG. 5 and inverted L-shaped as viewed in FIG. 5). Only the lower part is shown). When connecting the female joint member 10 to the male joint member 12, the operator holds the grips 70, 72 with both hands, aligns the male joint member receiving portion 28 with the male joint member 12 in the axial direction, Push toward the male joint member 12. By doing so, the male joint member 12 is inserted into the female joint member 10 as described above, and finally, the locking element pressing member 44 becomes the locking position (FIG. 4), and the male The joint member 12 is fixed to the female joint member 10. In the illustrated example, a coil spring 60 for pressing the lock pressing member forward is provided. However, the coil spring is not necessarily required, and an operator holds the lock pressing member 44 forward with the handle. Can be displaced.

  The spherical valve 24 provided on the central cylinder member 26 of the joint body 18 is opened and closed by turning a lever 74 provided on the upper part of the central cylinder member 26. A rotation preventing member 64-2 extending to the vicinity of the lever 74 is fixed to the upper end of the rear end 64-1 of the cylindrical connecting member 64 of the handle 62 attached to the locker pressing member 44, and the locker pressing member When 44 is in the unlocked position of FIG. 1, even if the lever 74 is to be rotated, the rotation preventing member 64-2 is engaged so that the lever 74 cannot be rotated. When the locking element pressing member 44 moves to the locking position (FIG. 4) forward in the axial direction and the inserted male joint member 12 is fixed, the anti-rotation member moves away from the lever 74 and the lever 74 rotates. The movement, that is, the movement of the spherical valve 24 to the open position is allowed. When the spherical valve 24 is in the open position, the pressurized fluid flows into the male joint member 12 through the fluid passage 22 and the poppet valve 32 and flows through the poppet valve 86 of the male joint member. .

  In FIG. 1, a fluid discharge means 88 is provided in the lower portion of the joint body 18, and when the connected male joint member 12 is extracted, the poppet type valve in the female joint member is provided. A discharge passage 76 for discharging the pressurized fluid remaining between the valve 32 and the spherical valve 24 to the outside is provided.

  In the illustrated example, a retaining ring 78 is provided at the front end portion of the joint body to prevent the locking element pressing member 44 from coming out, and the poppet valve 32 slides on the outer peripheral surface thereof. The cylinder member 80 which is set to be possible, the stop ring 82 which prevents the cylinder member from coming out of the front end of the poppet-shaped valve 32, and the coil spring 84 are urged to the position where the fluid passage is closed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made within the technical scope of the present invention described in the claims.

It is a partially cutaway side view showing a female joint member according to the present invention and a male joint member inserted and connected to the female joint member. It is the partial side view which made the upper half part the cross section which shows the state which the male coupling member began to insert in the female coupling member of FIG. FIG. 3 is a partial side view with the upper half portion taken as a cross section, showing a state in which insertion of the male joint member has proceeded further than in FIG. 2. It is a partial side view which made the cross section the upper half part which shows the state by which the male coupling member was inserted completely and connected to the female coupling member. It is a top view of the female coupling member of FIG.

Explanation of symbols

T Pipe 10 connected to female joint member Female joint member 12 Male joint member 12-1 Outer peripheral surface 12-2 Locking element receiving recess 16 Pipe joint 18 Joint body 20 Adapter 22 Fluid passage 24 Spherical valve 26 Central tube member 28 Male joint member receiving portion 30 Front cylindrical member 30-1 Inner peripheral surface 32 Poppet valve 34 Fixed connecting means 36 Radial hole 40 Locking element 44 Locking element pressing member 44-1 Stator receiving recess 50 Stator 52 fixing Child support member 52-1 Large diameter portion 52-2 Inclined surface 52-3 Small diameter portion 60 Coil spring 62 Handle 64 Connection member 64-1 Connection member rear end portions 66, 68 Connection members 70, 72 Grip 74 Lever 76 Discharge passage 78 Stop ring 80 Tubular portion 82 Stop ring 84 Coil spring 86 Poppet valve 88 Fluid discharge means

Claims (4)

A female joint member adapted to be coupled to a male joint member,
A male joint member receiving portion adapted to receive the male joint member, and a fluid passage communicating with the fluid passage of the male joint member received in the male joint member receiving portion, A joint body provided with a radial hole in the joint member receiving portion;
A lock provided in the radial hole,
In order to prevent the male joint member from slipping out of the male joint member receiving portion by fitting into the lock receiving recess formed on the outer peripheral surface of the male joint member inserted into the male joint member receiving portion. Mating position,
A non-fitting that is located radially outward from the fitting position and allows the male joint member to be released from the male joint member receiving portion when the male joint member is released from fitting into the lock receiving recess. A lock that is displaceable between the joint positions;
A locking element pressing member attached to the outside of the male joint member receiving portion,
A locking position for pressing the locking element into the fitting position;
A locking element pressing member that is displaceable between unlocking positions that allow the locking element to move to a non-fitting position;
A stator that engages with the locking element pressing member to hold the locking element pressing member in the unlocked position and allows the locking element pressing member to move to the locking position by being detached from the locking element pressing member. When,
A stator support member for supporting the stator provided in the male joint member receiving portion from the inside in the radial direction,
A retracted position moved rearward by the male joint member inserted into the male joint member receiving portion until the locking element receiving recess of the male joint member is in a position to receive the lock;
A stator support member that is displaceable between forward positions closer to the locking member than the retracted position;
A first biasing member that biases the stator support member toward the forward movement position,
When the stator support member is in the advanced position, the stator is pressed radially outward to engage the locker pressing member in the unlocked position so that the locker pressing member is unlocked. And when the stator support member is moved backward from the advanced position to the retracted position, the stator is disengaged from the lock pressing member and the lock pressing member is moved to the locked position. A female joint member characterized by being allowed.
The stator is spherical, and the locking member pressing member has a stator receiving recess for receiving the spherical stator when in the unlocked position;
The stator support member, when in the advanced position, engages with the stator and pushes the stator into the stator receiving recess;
An inclined surface that is inclined radially inward and forward from the pushing surface;
When the stator support member is moved backward from the advance position, the inclined surface is adapted to engage the stator, and the stator is moved as the stator support member moves toward the retract position. When the stator support member reaches the retracted position when displaced radially inward along the inclined surface, the stator is removed from the stator receiving recess, and the lock pressing member is directed to the lock position. The female joint member according to claim 1, wherein the female joint member is allowed to be moved.   The female mold according to claim 1 or 2, further comprising a handle that is fixed to the locking element pressing member and includes a grip that can be gripped by an operator at a rear position of the female joint member. Joint member. The female joint member according to any one of claims 1 to 3, further comprising second urging means for urging the locking member pressing member from the unlocked position to the locked position.

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