JP4437973B2 - Pipe fitting and its female pipe fitting member - Google Patents

Description

  The present invention relates to a pipe joint, and more particularly to a female pipe joint that enables insertion of a male pipe joint member with a relatively small insertion force when a male pipe joint member is inserted and connected to a female joint member. The present invention relates to a member and a pipe joint including the female pipe joint member.

In a pipe joint composed of a female pipe joint member and a male pipe joint member each provided with an on-off valve that is spring-biased and in the closed position, when the male pipe joint member is inserted and connected to the female pipe joint member Each open / close valve must be displaced from the closed position to the open position against the spring force. Therefore, especially when the diameter of the pipe joint is large, the diameter of the sliding part of the on-off valve is large, and a large spring force is required to return the open / close valve to the closed position. When it is necessary to prevent the fluid from leaking by pressing the open / close valve in the closed position against the valve seat with a large spring force to be used in a negative pressure environment, the male pipe fitting member should be In order to insert it into the female pipe joint member, a large force against such a spring force is required. (See Patent Documents 1 and 2)
Reality 6-19911 No. 7-43588

Therefore, it is desirable to make the force for inserting the male pipe coupling member into the female pipe coupling member as small as possible.
The present invention has been made in view of these points.

That is, the present invention is a cylindrical main body provided with a fluid passage having a male member receiving portion at the front end portion;
A fixed valve body provided in the fluid passage of the tubular body;
A slide valve body provided between an inner wall surface of the cylindrical body and the fixed valve body, and slidable in a longitudinal axis direction of the fluid passage;
A closed position for sealingly engaging the fixed valve body and closing the fluid passage;
The male fitting member inserted into the male member receiving portion is pressed and displaced rearward in the longitudinal axis direction, and the sealing engagement with the fixed valve body is released to open the fluid passage. A slide valve body that is displaceable between,
Between the valve body engagement position which is provided in the cylindrical main body so as to be displaceable in the radial direction of the cylindrical member and engages with the slide valve body, and the valve body engagement release position away from the slide valve body A displaceable valve element engaging member,
A pressure position provided on the cylindrical main body to press the valve element engaging element to the valve element engaging position and prevent the slide valve element from moving from the closed position; and the valve element engaging element. An operation member that is displaceable between a pressure release position that allows the slide valve body to be displaced between the closed position and the open position. ,
When the male pipe coupling member is pulled out from the male member receiving portion, the male pipe coupling member and the slide valve body are connected, and the slide valve body is displaced from the open position to the closed position. A male member engaging element for releasing the connection between the male pipe joint member and the slide valve body when the slide valve body is in the closed position;
And a female pipe joint member comprising the female pipe joint member and a male pipe joint member fitted and inserted into the female pipe joint member.
In the female pipe joint member and the pipe joint, the slide valve body can be held in the closed position without the spring member that urges the slide valve body to the closed position, so that the conventional slide valve body is closed. The force required when inserting the male pipe joint member into the female pipe joint member is smaller than that provided with the spring member for biasing the position.

In particular,
The male member engaging element is provided on the slide valve body and is displaced radially inward and engaged and connected to the male pipe joint member, and is displaced radially outward. A male member disengagement position that is distant from the male pipe joint member, and is displaceable to the male member disengagement position when the slide valve body is in the closed position; When the slide valve body is displaced between the closed position and the open position, the male member engagement position can be set.

  More specifically, the inner wall surface of the cylindrical main body moves the male member engaging element to the male member engaging position when the slide valve body is displaced between the closed position and the open position. A pressing portion for pressing the male member engaging member, and an opening recess for allowing the male member engaging element to be in the male member disengaging position when the slide valve body is in the closed position. it can.

  That is, when the slide valve body is displaced between the closed position and the open position, the male member engaging element engages and connects the slide valve body to the male pipe joint member, and the female pipe member of the male pipe joint member is engaged. The slide valve body is forcibly displaced between the closed position and the open position as the pipe joint member is inserted and pulled out, and when the slide valve body is in the closed position, the male member engaging element is male. The male pipe joint member can be pulled out of the female pipe joint member in a state where the slide valve body is left in the closed position apart from the mold pipe joint member.

Specifically, the operation member can be displaced in the axial direction between the pressing position and the pressing release position on the cylindrical main body,
A spring member is provided between the operating member and the cylindrical main body to urge the operating member toward the pressing position forward in the axial direction.
The cylindrical main body is provided so as to be displaceable in the radial direction, and is pressed outward in the radial direction by the male fitting member inserted into the male member receiving portion, whereby the operating member is moved to the spring. An operation member engaging member is provided that is displaced to the pressing release position against the member and allows the slide valve body to be displaced from the closed position toward the open position by the male pipe joint member. Like that. That is, by doing in this way, when the male pipe joint member has been inserted into the female pipe joint member, the operation member engaging element moves the operation member to the pressing release position, and the slide valve body moves to the open position. Automatically allow displacement.

Further, when the male pipe joint member displaces the slide valve body to the open position, the operating member engaging element is displaced radially inward and disengaged from the operating member, and the operating member is moved to the spring. An operating member engaging member receiving recess for allowing the member to be displaced forward in the axial direction by the member;
The operating member displaced forward in the axial direction presses and engages the operating member engaging element with the operating member engaging element receiving recess to prevent the male fitting member from being pulled out from the male receiving part. It is preferable to do so.

  In the female pipe joint member and the pipe joint according to the present invention, as described above, the slide valve body can be held in the closed position without the spring member that biases the slide valve body to the closed position. The male pipe joint member can be inserted into the female pipe joint member with a small force as compared with a conventional spring member that biases the slide valve body to the closed position.

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

  The pipe joint 10 according to the present invention has a female pipe joint member 12 and a male pipe joint member 14, and the male pipe joint member 14 is separated from the female pipe joint member 12 (FIG. 1). ) To the connecting position (FIG. 5) inserted into the female pipe joint member 12 and connected to each other, and from this connecting position (FIG. 5) to the separated position (FIG. 1). Has been.

  First, the female pipe coupling member 12 includes a cylindrical main body 20 having a fluid passage 18 having a male member receiving portion 16 at a front end portion, and a fixed valve body 22 provided in the fluid passage 18 of the cylindrical main body 20. A slide valve body 24 provided between the inner wall surface of the cylindrical main body 20 and the fixed valve body 22 and slidable in the axial direction of the fluid passage 18; On the cylindrical main body 20, the valve body engaging element 26 and the operating member engaging element 38 that are displaceable in the radial direction, the male member engaging element 28 that is displaceable in the radial direction on the slide valve element 24, and And a cylindrical operation member 30 provided to be displaceable in the front-rear direction.

  In the illustrated example, the cylindrical main body 20 includes a first cylindrical member 20-1 at the front position and a second cylindrical member called a normal adapter screwed to the first cylindrical member 20-1. 20-2.

  The fixed valve body 22 includes a spider portion 22-1 including a plurality of members extending radially from the center of the fluid passage 18 and fixed to the second tubular member 20-2, and a shank extending forward from the center of the spider portion. And an annular seal ring 34 is attached to the tip of the shank portion 22-2.

  The slide valve body 24 is closed by a closed position (FIGS. 1 to 3) where the fluid passage 18 is closed by sealingly engaging with the fixed valve body 22 and the male pipe joint member 14 inserted into the male member receiving portion 16. By being pressed and displaced rearward in the axial direction, the sealing engagement with the fixed valve body 22 is released and the fluid passage 18 can be displaced between the open position (FIG. 5).

  The valve body engaging element 26 (provided in the cylindrical main body 20) engages with an annular recess 24-1 provided on the outer peripheral surface of the slide valve body 24, so that the slide valve body 24 is in relation to the cylindrical main body 20. The valve body engaging position (FIGS. 1 and 2) for preventing relative movement in the axial direction enters the annular recess 30-1 provided on the inner peripheral surface of the operation member, and the slide valve body 24 is engaged. The engagement is released, and the slide valve body 24 can be displaced between a valve body disengagement position (FIG. 3) that allows the slide valve body 24 to move relative to the cylindrical body in the axial direction.

  A male member engaging element 28 (provided on the slide valve body 24) engages with an annular recess 14-1 provided on the outer peripheral surface of the male fitting member 14 inserted into the fluid passage 18, The male member engaging position (FIG. 5) for fixing the slide valve body 24 in the axial direction to the male pipe joint member 14 and the large diameter of the inner peripheral surface of the first tubular member 20-1. A male mold that enters the annular recess 20-3 and is disengaged from the annular recess 14-1 of the male pipe joint member 14 so that the male pipe joint member 14 can be displaced relative to the slide valve body 24 in the axial direction. It can be displaced between the member disengagement positions (FIG. 2).

  The operation member 30 is configured such that the valve element engaging element 26 is engaged with the valve element engaging position (FIGS. 1 and 2: the valve element engaging element is engaged with the annular recess 24-1 of the slide valve element 24 and the slide valve element 24 is closed. A pressing position (FIGS. 1 and 2) that presses (a position that prevents movement from FIG. 1 to FIG. 3), and a valve body engagement release position (FIG. 4: the valve body engaging element 26 is attached to the operation member 30). A pressure that allows a large-diameter annular recess 30-1 provided on the inner peripheral surface to enter, disengage from the slide valve body 24, and move to the open position (position that allows the slide valve body to move to FIG. 5). It can be displaced between the release position (FIG. 3).

  Between the operation member 30 and the cylindrical main body 20, the operation member 30 is brought into a pressed position (FIGS. 1 and 2: a position where the slide valve body 24 is prevented from moving from the position of FIGS. 1 and 2). A spring member (compression coil spring) 36 that biases forward in the axial direction is provided.

  In the state where the male pipe joint member 14 shown in FIG. 1 is separated from the female pipe joint member 12, the slide valve body 24 of the female pipe joint member 12 is sealingly engaged with the annular seal ring 34 of the fixed valve body 22. Thus, the fluid passage 18 is closed, and the operating member 30 is in a position to press the valve element engaging element 26 against the annular recess 24-1 of the slide valve element 24. Therefore, the slide valve element 24 is a cylindrical valve element. 20 in a fixed state. In the male pipe coupling member 14, the on-off valve 42 set in the fluid passage 40 is urged to the closed position by a spring member (compression coil spring) 44.

  In order to change the male pipe joint member 14 from the separation position of FIG. 1 to the connection position of FIG. 5, the male pipe joint member 14 is inserted into the male member receiving portion 16 of the female pipe joint member 12, 2, the inclined surface 14-2 provided on the outer peripheral surface of the male pipe joint member 14 presses the operating member engaging element 38 radially outward, and the operating member engaging element 38 becomes the operating member. The operation member 30 starts to be displaced to the left as viewed in the figure by being pressed and engaged with the inclined surface 30-3 following the large-diameter front end portion 30-2 on the inner peripheral surface 30 of the drawing.

  As shown in FIG. 3, in a state where the distal end of the male pipe coupling member 14 is inserted until it contacts the slide valve body 24, the annular recess 30-1 of the operation member 30 is aligned with the valve body engaging element 26 in the radial direction. In addition, the male member engaging element 28 is aligned with the annular recess 14-1 of the male pipe joint member 14 in the radial direction. Accordingly, when the male pipe joint member 14 is further pushed into the female pipe joint member 12, the valve element engaging element 26 is pushed into the annular recess 30-1 of the operating member, and the male member engaging element 28 is inserted into the male pipe. The slide valve body 24 is pushed leftward in the axial direction with respect to the cylindrical main body 20 while being pushed into the annular recess 14-1 of the joint member 14.

  In the state shown in FIG. 5, the operation member engaging element 38 is in a position aligned with the annular recess 14-3 provided in the male pipe joint member 14 in the radial direction, and the valve element engaging element 26 is in the operation member 30. It will be in the state which removed from the annular recessed part 30-1. Therefore, the operating member 30 is returned to the right by the spring member 36, and the operating member engaging member 38 is pressed and engaged with the annular recess 14-3 of the male pipe coupling member 14 so that the male pipe coupling member 14 is engaged. It fixes to the cylindrical main body 20 (accordingly, the female pipe joint member 12).

  When the male pipe joint member 14 is pulled out from the female pipe joint member 12, the operator displaces the operation member 30 from the position in FIG. 5 to the position in FIG. 3 against the spring member 36. As a result, the operation member engaging element 38 can be displaced in the radial direction, and when the male pipe coupling member 14 is pulled rightward, the slide valve fixed to the male pipe coupling member 14 by the male member engaging element 28. When the male member engaging element 28 is displaced to the right together with the body 24 and reaches the position shown in FIG. 3, the male member engaging element 28 is aligned with the annular recess 20-3 of the first cylindrical member 20-1. Is disconnected from the male pipe joint member 14, and only the male pipe joint member 14 is moved rightward and pulled out from the female pipe joint member 12. In this state, when the operator removes the operation member 30 from the hand, the operation member 30 is returned to the position of FIG. 1 by the spring member 36, and the valve body engaging element 26 is pressed against the annular recess 24-1 of the slide valve body 24. The slide valve body 24 is engaged and fixed in the axial direction.

  As is apparent from the above description, in the pipe joint 10 according to the present invention, the spring means for biasing the slide valve body 24 provided in the female pipe joint member 12 to the closed position (FIGS. 1 to 3). Although the valve body engaging element 26 in the closed position is engaged with the slide valve body 24, the valve body engaging element 26 can be held in this position.

It is a longitudinal cross-sectional view of the pipe joint which concerns on this invention in the state which the male pipe joint member isolate | separated from the female pipe joint member. In the process of connecting the male pipe joint member to the female pipe joint member, the engaging member operating member of the female pipe joint member is displaced rearward in the axial direction of the female pipe joint member by the inserted male pipe joint member. It is a longitudinal cross-sectional view which shows the state which began to be done. In the process of connecting the male pipe joint member to the female pipe joint member, the male pipe joint member is further inserted into the female pipe joint member, whereby the engagement member operating member is further displaced rearward and the valve body. It is a longitudinal cross-sectional view which shows the state by which the engagement element became displaceable to radial direction outer side, and the slide valve body became displaceable relatively with respect to a fixed valve body. In the process of connecting the male pipe joint member to the female pipe joint member, the valve body engaging element enters the large-diameter annular recess provided on the inner peripheral surface of the operation member, and is disengaged from the slide valve body. It is a longitudinal cross-sectional view which shows the state which the valve body started to move to an open position. It is a longitudinal cross-sectional view which shows the state which the connection to the female pipe joint member of a male pipe joint member was completed.

Explanation of symbols

10 Pipe Fitting 12 Female Pipe Fitting Member 14 Male Pipe Fitting Member 14-1 Annular Recess 14-2 Inclined Surface 14-3 (Male Fitting Member) Annular Recess 16 Male Member Receiving Part 18 Fluid Passage 20 Main body 20-1 First cylindrical member 20-2 Second cylindrical member (adapter)
20-3 annular recess 22 fixed valve body 22-1 spider portion 22-2 shank portion 24 slide valve body 24-1 annular recess 26 valve body engaging element 28 male member engaging element 30 operating member 30-1 annular recessed part 30-2 Front end portion 30-3 Inclined portion 34 Annular seal ring 36 Spring member (compression coil spring)
38 Operating member engagement element 40 Fluid passage 42 (of male pipe coupling member) On-off valve 44 Spring member

Claims (10)

A cylindrical body comprising a fluid passage having a male member receiving portion at the front end portion;
A fixed valve body provided in the fluid passage of the tubular body;
A slide valve body provided between an inner wall surface of the cylindrical body and the fixed valve body, and slidable in a longitudinal axis direction of the fluid passage;
A closed position for sealingly engaging the fixed valve body and closing the fluid passage;
The male fitting member inserted into the male member receiving portion is pressed and displaced rearward in the longitudinal axis direction, and the sealing engagement with the fixed valve body is released to open the fluid passage. A slide valve body that is displaceable between,
Between the valve body engagement position that is provided in the cylindrical main body so as to be displaceable in the radial direction of the cylindrical member and engages the slide valve body, and the valve body engagement release position that is separated from the slide valve body A displaceable valve element engaging member,
A pressure position provided on the cylindrical main body for pressing the valve element engaging element to the valve element engaging position to prevent the slide valve element from moving from the closed position; and the valve element engaging element. An operation member that is displaceable between a pressure release position that allows the slide valve body to be displaced between the closed position and the open position. ,
When the male pipe coupling member is pulled out from the male member receiving portion, the male pipe coupling member and the slide valve body are connected, and the slide valve body is displaced from the open position to the closed position. A male member engaging element for releasing the connection between the male pipe joint member and the slide valve body when the slide valve body is in the closed position;
A female pipe joint member comprising: The male member engaging element is provided on the slide valve body and is displaced radially inward and engaged and connected to the male pipe joint member, and is displaced radially outward. A male member disengagement position that is distant from the male pipe joint member, and is displaceable to the male member disengagement position when the slide valve body is in the closed position; The female in a pipe joint according to claim 1, wherein when the slide valve body is displaced between the closed position and the open position, the male member engagement position is set. Type pipe joint member. An inner wall surface of the cylindrical main body includes a pressing portion that presses the male member engaging element to the male member engaging position when the slide valve body is displaced between the closed position and the open position. 3. An open recess that allows the male member engaging element to be in the male member disengaging position when the slide valve body is in the closed position. Female pipe joint member. The operation member is displaceable in the axial direction between the pressing position and the pressing release position on the cylindrical main body,
A spring member is provided between the operating member and the cylindrical main body to urge the operating member toward the pressing position forward in the axial direction.
The cylindrical main body is provided so as to be displaceable in the radial direction, and is pressed outward in the radial direction by the male fitting member inserted into the male member receiving portion, whereby the operating member is moved to the spring. An operation member engaging member is provided that displaces the member against the pressing release position against the member and allows the slide valve body to be displaced from the closed position toward the open position by the male pipe joint member. The female pipe joint member according to any one of claims 1 to 3, wherein the female pipe joint member is provided. When the male pipe coupling member displaces the slide valve body to the open position, the operating member engaging element is displaced radially inward and disengaged from the operating member, and the operating member is moved by the spring member. An operation member engaging member receiving recess for allowing displacement in the axial direction forward;
The operating member displaced forward in the axial direction presses and engages the operating member engaging element with the operating member engaging element receiving recess to prevent the male fitting member from being pulled out from the male receiving part. The female pipe joint member according to claim 4, wherein the female pipe joint member is configured as described above. A pipe joint comprising a female pipe joint member and a male pipe joint member fitted and connected to the female pipe joint member,
The female pipe joint member is
A cylindrical body comprising a fluid passage having a male member receiving portion at the front end portion;
A fixed valve body provided in the fluid passage of the tubular body;
A slide valve body provided between an inner wall surface of the cylindrical body and the fixed valve body, and slidable in a longitudinal axis direction of the fluid passage;
A closed position for sealingly engaging the fixed valve body and closing the fluid passage;
The male fitting member inserted into the male member receiving portion is pressed and displaced rearward in the longitudinal axis direction, and the sealing engagement with the fixed valve body is released to open the fluid passage. A slide valve body that is displaceable between,
Between the valve body engagement position which is provided in the cylindrical main body so as to be displaceable in the radial direction of the cylindrical member and engages with the slide valve body, and the valve body engagement release position away from the slide valve body A displaceable valve element engaging member,
A pressure position provided on the cylindrical main body for pressing the valve element engaging element to the valve element engaging position to prevent the slide valve element from moving from the closed position; and the valve element engaging element. An operation member that is displaceable between a pressure release position that allows the slide valve body to be displaced between the closed position and the open position. ,
When the male pipe coupling member is pulled out from the male member receiving portion, the male pipe coupling member and the slide valve body are connected, and the slide valve body is displaced from the open position to the closed position. A male member engaging element for releasing the connection between the male pipe joint member and the slide valve body when the slide valve body is in the closed position;
The pipe joint in the pipe joint characterized by having. The male member engaging element is provided on the slide valve body and is displaced radially inward and engaged and connected to the male pipe joint member, and is displaced radially outward. A male member disengagement position that is distant from the male pipe joint member, and is displaceable to the male member disengagement position when the slide valve body is in the closed position; The pipe joint according to claim 6, wherein when the slide valve body is displaced between the closed position and the open position, the slide member is set to the male member engaging position. An inner wall surface of the cylindrical main body includes a pressing portion that presses the male member engaging element to the male member engaging position when the slide valve body is displaced between the closed position and the open position. The open recess for allowing the male member engagement element to be in the male member disengagement position when the slide valve body is in the closed position. Pipe fittings. The operation member is displaceable in the axial direction between the pressing position and the pressing release position on the cylindrical main body,
A spring member is provided between the operating member and the cylindrical main body to urge the operating member toward the pressing position forward in the axial direction.
The cylindrical main body is provided so as to be displaceable in the radial direction, and is pressed outward in the radial direction by the male fitting member inserted into the male member receiving portion, whereby the operating member is moved to the spring. An operation member engaging member is provided that displaces the member against the pressing release position against the member and allows the slide valve body to be displaced from the closed position toward the open position by the male pipe joint member. The pipe joint according to any one of claims 6 to 8, wherein the pipe joint is provided. When the male pipe coupling member displaces the slide valve body to the open position, the operating member engaging element is displaced radially inward and disengaged from the operating member, and the operating member is moved by the spring member. An operation member engaging member receiving recess for allowing displacement in the axial direction forward;
The operating member displaced forward in the axial direction presses and engages the operating member engaging element with the operating member engaging element receiving recess to prevent the male fitting member from being pulled out from the male receiving part. The pipe joint according to claim 9, which is configured as described above.

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