JPH08170779A - Plug-in connection type tube joint device having opening/ closing valve - Google Patents

Abstract

PURPOSE: To smooth the flow of a pressurized fluid, to simplify the constitution of a connection mechanism, to prevent the erroneous operation, and surely achieve the hydraulic pressure purge effect at the secondary connection side. CONSTITUTION: An opening/closing valve operating mechanism part 11 provided with an opening/closing valve 13 to open/close a primary side flow passage 2 and first and second cam means 18, 19, and a hydraulic pressure purge mechanism part 31 provided with a cylindrical purge member 32 are built in a pipe joint body 1. A joint mechanism part 21 provided with engagement keeping means 22, 23 which are provided with a female joint member 23, restrict the operation of the opening/closing valve operating mechanism 11 through the hydraulic pressure purge mechanism part 31 in the non-connecting condition, and independently hold a male joint member 41 in the connecting condition, and releasing means 22, 24 which restrict the holding condition of the male joint member 41 by the engagement keeping means 22, 23, are restricted through the hydraulic pressure purge mechanism part 31, and release the holding condition as the hydraulic pressure purge mechanism part 31 returns is built in the pipe joint body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in connection type pipe joint device with an on-off valve, particularly for handling a pressurized fluid,
More specifically, it is configured so that the external male joint member can be securely and safely connected to the female joint member inside the pipe joint body having the on-off valve by plug-in and disconnection by plug-out. The present invention relates to an improvement of the plug-in connection type pipe joint device with an open / close valve.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional plug-in connection type pipe fitting device with an on-off valve of this kind.

Here, FIG. 8 shows a schematic configuration of a plug-in connection type pipe joint device with an on-off valve according to a conventional example, in a non-connection closed state (upper half portion) and a connection open state (lower half portion). It is the whole longitudinal section side view shown in half.

In other words, the conventional plug-in connection type pipe fitting device with an on-off valve has an internal primary passage 51 on the primary side in the axial direction, as seen in the upper half configuration shown as a non-connection closed state in FIG.
a having a pipe joint body 51 formed therein.
A valve seat member 52 which is sealed with a seal ring 52a on the inner surface separated by a stepped portion 51b and has a valve seat 52b formed on an inner end surface thereof and is slidable in the axial direction;
a, the pressing surfaces 53b and 53c are formed on the inner peripheral surface and the outer peripheral surface on the outer end side, respectively.
b and 53c, an inner engaging hole 53e adjacent to the restraining member 53 in which a plurality of engaging balls 53d are inserted is disposed, and the inner peripheral surface of the valve seat member 52 is sealed by a seal ring 54a. A female joint member 54 slidable along the inner peripheral surface of the member 53 is arranged, and a release member 55 slidable along the outer peripheral surface on the outer end surface side of the pipe joint body 51. Is arranged.

[0005] The female joint member 54 has a valve head 54b with a valve seal 54c on the inner end face side, and has a connection flow passage 54d and a valve head 54 that are open axially inside to the outer end face side.
b, a communication passage 54e opened to the outer peripheral surface side is formed in each of them, and an abutting step portion 54f is formed inside the outer end surface side, and an outer passage of the abutting step portion 54f is formed. After the seal ring 54g is provided on the inner surface, the outer end surface is a restraining surface 54h, the inner side on the outer end surface side is a tapered surface 54i, and the outer side is a pushing surface 54j. And this female type joint member 5
4 is a pressing spring 5 between the valve seat member 52 and the outer peripheral surface side.
6, the valve seal 5 of the valve head 54b is interposed.
4c is pressed against the valve seat 52b to shut off the flow paths from each other, that is, to achieve the desired valve closing action, and at the same time, the restraining surface 54h is brought into contact with the pressing surface 53b to restrain the sliding.

The release member 55 has an inclined cam surface 55a formed on the inner side on the outer end surface side, and a pressing surface 55b formed on an inner peripheral surface on the inner end surface side connected to the cam surface 55a. Each release member 55 is partially exposed on the outer peripheral surface of the restraining member 53 by interposing a pressing spring 57 on the inner peripheral surface side with the outer end surface of the pipe joint body 51. The cam surface 55a is pressed against the combined ball 53d.

On the other hand, a male joint member 61 plug-in connected to the female joint member 54 in the pipe joint body 51,
As seen in the lower half configuration shown as the connected valve opening state in FIG. 19, the secondary side internal flow path 61a is formed in the axial direction, and the contact end portion 54f is abutted from the connection end portion side. A pressing surface 61b that is pressed, an outer peripheral surface 61c that is sealed by the seal ring 54g, a tapered surface 61d that abuts the tapered surface 54i, and an engagement groove 61e that engages the engagement balls 53d are formed respectively. I am doing it.

Therefore, in the case of the conventional plug-in connection type pipe fitting device with an opening / closing valve having the above-mentioned configuration, in the upper half configuration shown as the non-connection closed state in FIG. The female joint member 54 and the valve seat member 52 are pressed by the pressing spring 56 in directions opposite to each other on the inner end surface side and the outer end surface side, and the female joint member 54 is not connected. Abuts against the pressing surface 53b on the inner peripheral surface side of the restricting member 53, and the valve seal 54c of the female joint member 54 is
Is slightly pressed away from the valve seat 52b of the valve seat member 52 to maintain a closed state between the two flow paths 51a and 54d. The pushing surface 54j of the mold joint member 54 pushes each of the engagement balls 53d of the restraining member 53 to the outer peripheral side to partially expose the engaging ball 53d, and the release member 55 is pressed to the outer end surface side by the pressing spring 57, so that the cam surface 55a Is brought into contact with the exposed portion of each engagement ball 53d to maintain the release member 55 at the valve closing position.

Next, in the lower half configuration shown in the connected valve open state of FIG. 8, the female spring member 54 of the pipe joint body 51 is pressed against the female end member 54 of the pipe joint body 51 from the outer end side in the non-connection closed state. The desired plug-in connection is made by pushing the male joint member 61 against the pressing force of 56.

That is, first, in the non-connection closed state, the connection end of the male joint member 61 is inserted into the outer end of the female joint member 54. That is, by contacting the pressing surface 61b of the male joint member 61 with the abutting step 54f of the female joint member 54, the outer peripheral surface 61c is sealed by the seal ring 54g, and the tapered surface 61d is tapered.
4i is abutted.

Next, in this inserted state, when the male joint member 61 is pushed in against the pressing force of the pressing spring 56, the female joint member 54 moves to the inner end side, and the valve seat is moved. After moving the member 52 until it comes into contact with the step portion 51b, the valve seal 54c is separated from the valve seat 52b and opened, and at the same time, with the movement of the pushing surface 54j, each engagement ball of the restraining member 53 is moved. After the restriction of 53d is released, each engaging ball 53d falls into the engaging groove 61e of the male joint member 61 due to the cam action of the cam surface 55a of the release member 55 pressed by the pressing spring 57. At the same time, the release member 55 moves to the valve opening position and is held by the pressing surface 55b, and the cam surface 55a abuts against the pressing surface 53c on the outer peripheral surface side to shift to the connection valve open state. In this connection-opened state, the fluid flows from the primary-side internal flow path 51a through the secondary-side communication flow path 54e bounded by the valve section, to each of the secondary-side connection flow paths 54d and the internal flow path. 61a.

Next, in order to shift from the connection-open state to the non-connection-closed state, that is, to perform plug-out, the release member 55 which is moving to the valve-open position in the connection-open state is pressed. What is necessary is just to move to the valve closing position side against the pressing force of the spring 57, and the movement of the release member 55 to the valve closing position causes the engagement of each of the engagement balls 53d to the engagement groove 61e. In order to be released, the female joint member 54 is automatically returned to the original state by the pressing force of the pressing spring 56 to perform the valve closing action. In the valve closed state, the female joint member 54 is released. The male joint member 61 can be easily extracted from the connector 54.

[0013]

However, in the case of the conventional plug-in connection type pipe joint device with an on-off valve having the above-described structure, the on-off valve mechanism is integrated with the female type joint member, so that the overall structure is increased. Not only becomes extremely complicated itself, but also has a disadvantage that the flow of fluid lacks smoothness because the on-off valve operating mechanism exists so as to block the inside of the flow path. In order to obtain an accurate valve closing action, since the elastic force of the pressing spring between the valve seat member and the female joint member is set to be strong, the pushing resistance of the male joint member with respect to the female joint member is compared. Powerful
There is a problem that plug-in connection operation is not easy.

On the other hand, since the release member for releasing the connection is always in a release operation state, there is a possibility that the release member may be released excessively. Further, the valve shifts from the open state to the closed state. In this case, means for purging the secondary fluid pressure remaining in the male coupling member is not added, and
Even if added, since the purging operation of the purging member is regarded as a one-way operation, there is a disadvantage that the releasing operation involves danger.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. It is an object of the present invention to facilitate the flow of pressurized fluid and to simplify the structure of a connection mechanism. Another object of the present invention is to provide a plug-in connection type pipe fitting device with an on-off valve, which prevents erroneous operation and can reliably perform a fluid pressure purging operation at a secondary connection side.

[0016]

To achieve the above object, a plug-in connection type pipe joint device with an on-off valve according to the present invention is operated in connection with an on-off valve operating mechanism and the on-off valve operating mechanism. The fluid pressure purge mechanism and the coupling mechanism are separately set, and the mechanisms are connected to each other to perform an erroneous operation prevention function. In addition, a fluid pressure purge function in the secondary flow path is provided. This can be performed by a directional operation.

That is, the present invention relates to a female joint member having a flow path which can communicate with a primary flow path in a pipe joint body.
The male joint member forming the secondary flow path is plugged in and maintained in a connected state in which the secondary fluid pressure cannot be purged, and is plugged out to be in a disconnected state in which the secondary fluid pressure can be purged. A pipe joint device for pressurized fluid, comprising an on-off valve for opening and closing the primary flow path in the pipe joint body, and first and second interlocking with the on-off operation of the on-off valve. An opening / closing valve operating mechanism provided with each of the cam means; and a rotating operation by the first cam means, wherein the opening / closing valve operating mechanism is engaged with the first cam means and held at a non-connection position where fluid pressure can be purged. A fluid pressure purge mechanism portion having a cylindrical purge member which is later in contact with the second cam means and slidably restrained in a connection state in which fluid pressure cannot be purged; and the female joint member, and Operate the on-off valve operating mechanism via the fluid pressure purge mechanism in the disconnected state. An engagement and holding means for independently holding the male joint member in a connected state, and a holding state of the male joint member by the engagement and holding means, and A plug-in connection type pipe with an opening / closing valve, wherein the coupling mechanism section is provided with a release mechanism for releasing the holding state when the fluid pressure purge mechanism section is returned by the restraining operation. It is a joint device.

[0018]

Accordingly, the following effects can be obtained in the plug-in connection type pipe joint device with an on-off valve according to the present invention.

That is, in the unconnected state in which the male joint member is plugged out from the pipe joint body, the on-off valve provided in the primary side flow passage is maintained in the closed state by the on-off valve operating mechanism section. The tubular purging member of the fluid pressure purging mechanism portion is engaged with the first cam means of the on-off valve operating mechanism portion and is held at the non-connection position where the fluid pressure can be purged.

On the other hand, in this case, since the opening / closing valve operating mechanism is restrained by the releasing means of the joint mechanism, only the opening / closing valve operating mechanism is opened in the unconnected state. It is not possible.

In the unconnected state, in order to plug in the male joint member, first, the male joint member is plugged in to the female joint member of the engaging and holding means to release the male joint member. The restraint of the opening / closing valve operating mechanism portion by the means is released, and the valve opening operation becomes possible.

Next, by opening the on-off valve operating mechanism, the first cam means interlocked with the valve opening operation causes the cylindrical purge of the fluid pressure purging mechanism at an initial stage of the interlocking. After the member is displaced to a required pivot position, and after the first cam means is deviated, the second cam means continues to slide the cylindrical purge member which has been displaced. Is moved and restrained to a connection position that cannot be purged.
The male joint member is restrained by the engagement and holding means, and the plug-in connection is completed in this manner, and the pressurized fluid flows from the primary flow path of the pipe joint body to the opened / closed valve. Then, it flows into the secondary side flow path of the male joint member.

Further, in this case, the releasing means of the joint mechanism portion, and further the engagement holding means, are restrained via the cylindrical purging member of the fluid pressure purging mechanism portion, and by the restraint, the male Since the mold joint member is retained, the male joint member alone cannot be plugged out in the connection state as it is.

In order to plug out the male joint member in the connection state, first, the on-off valve operating mechanism is operated to close the on-off valve to close the on-off valve. Since the cylindrical purging member of the fluid pressure purging mechanism is in a restricted state while being rotationally deviated, the first cam means interlocking with the valve closing operation has a cylindrical shape. The return is started without operating the purge member, and at the final stage of the return operation, the second cam means is again restrained at a position past the engagement position with respect to the cylindrical purge member, and the connection state is continued. In this state, similarly, it is impossible to plug out only the male joint member.

Next, in a state where the opening / closing valve operating mechanism is operated to the valve closing position, the cylindrical purge member which is rotationally deviated is operated to recover the deviation and sliding positions. By re-engaging, the cylindrical purge member is completely returned to the non-connection position, in other words, the purge-possible position, and purges the fluid pressure remaining in the secondary flow path after closing the valve. The second cam means re-restrains the cylindrical purging member, and thus the retaining means of the male joint member itself by the releasing means is released. In this state,
The male joint member can be easily plugged out.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a plug-in connection type pipe joint device with an on-off valve according to the present invention will be described below in detail with reference to FIGS.

FIGS. 1 to 7 show a basic plug-in connection type pipe joint device with an on-off valve to which an embodiment of the present invention is applied. FIG. FIG. 2 is an overall longitudinal side view showing a schematic configuration of a valve closing state by the valve.
FIG. 3 is an overall side view showing a schematic configuration of a valve-closed state due to non-connection of the male joint member. FIG. 3 is a portion showing a connection relationship between an on-off valve operating mechanism and a fluid pressure purge mechanism in the valve-closed state. FIG. 4 is a plan view, and FIG. 4 is an overall vertical sectional side view showing a schematic configuration of a valve opening state associated with plug-in connection of a male joint member. FIG. 5 is an overall side view showing a schematic configuration of the valve opening state. FIG. 6 is a partial plan view showing a connection relationship between an opening / closing valve operating mechanism and a fluid pressure purge mechanism in an open state while the male coupling member is connected, and FIG. 7 is a male coupling member of the same. FIG. 4 is a partial plan view showing a connection relationship between an on-off valve operating mechanism and a fluid pressure purge mechanism in a closed state when the plug-out is performed.

The device of this embodiment is
An on-off valve operating mechanism that opens and closes the on-off valve of the primary flow path, a fluid pressure purge mechanism that purges fluid pressure in the secondary flow path when the valve is closed, and a primary-side flow path And a coupling mechanism of a female coupling member to be plugged into the fluid pressure purge mechanism and a coupling mechanism in connection with opening and closing operations of the on-off valve operating mechanism. It is constituted so that a part can operate.

That is, in the embodiment shown in FIGS. 1 to 7, the plug-in connection type pipe joint device with an on-off valve is provided with a pipe joint body 1 and incorporated in the pipe joint body 1 to form a flow passage. An open / close valve operating mechanism 11 that opens and closes, and a joint mechanism 21 that is connected to and restricted by the open / close valve operating mechanism 11 via a fluid pressure purge mechanism 31 to plug-in an external male joint member 41. Is done.

As is apparent from FIG. 1, the pipe joint body 1 is formed in a rectangular tube shape corresponding to the opening / closing valve operating mechanism portion 11 side, and corresponds to the fluid pressure purging mechanism portion 31 side. Is formed into a cylindrical shape, and the primary-side flow path 2 is formed inside in the axial direction, and then the connection pipe 3 is attached to the inner end side where the connection pipe 3 mounted on a fluid pressure generation source or the like is screwed. A communication space 5 communicating with the introduction flow path 4 and a valve shaft hole 6 that opens to the rectangular tubular surface 1a of the outer peripheral portion, and a seal ring 8 with a step portion 7 inside the outer end portion side. And further, the internal flow path 4
A plurality of purge holes 9 opening to the outer peripheral cylindrical surface 1b are formed in the intermediate portion of the above.

Further, in the case of the present embodiment, the opening / closing valve operating mechanism section 11 is a ball valve (ball valve) which is independently incorporated into the pipe joint body 1 and can be opened / closed from the outside. The valve seat member 12 is used, which is internally fixed in the communication space 5, and the ball valve member 1 which is rotatably fitted in the valve seat member 12 to form a valve flow path 13a in a required direction.
3 and the valve shaft hole 6 through a slit engagement with the ball valve member 13 so as to be rotatable.
And a lever board 16 which is integrally attached to a shaft portion of the valve shaft 14 with a cap nut 15 via a bearing plate and a spring washer.

As is apparent from FIGS. 2 and 3, the lever base plate 16 is located on one side in the present embodiment, and the pipe joint is in a predetermined direction, for example, in a valve closed position. A valve operating lever 17 extending in a direction orthogonal to the axial direction of the main body 1.
The valve shaft 14 is set as a rotation center o in a predetermined direction, for example, a direction parallel to the axial direction at the valve closing position in the other side portion. A substantially semicircular cam projection (first cam means) 18 projects at a difference between the valve closing position and the valve opening position, and
The valve operating lever 17 is connected to the cam projection 18 so that the cam projection 18 has a valve closing equivalent radius a, and the valve operating lever 17 has a valve closing equivalent radius a that corresponds to the difference interval. c to form a gentle eccentric arcuate guiding cam surface (second cam means) 19 which follows the valve opening direction of the ball valve member 13 and has a radius b equivalent to the valve opening. A stop piece 20 for regulating the valve rotation angle that extends from the projection 18 side and faces the valve operating lever 17 with the valve shaft 14 interposed therebetween is cut and raised to fall.

Here, the roles and mutual positional relations of the respective parts of the lever base plate 16 with the valve shaft 14 as the center of rotation will be summarized as follows.

That is, the valve operating lever 17 performs a valve operation of opening the ball valve member 13 from the closed position to the open position and closing the valve from the open position to the closed position. The piece 20 constitutes a valve rotation angle regulating means, and one end face side of the outer peripheral cylindrical tubular surface 1a of the pipe joint body 1 at each of the valve closing position and the valve opening position when the valve is operated by the valve operating lever 17. And restricts the valve rotation angle by abutting against the other end side.

The guiding cam surface 19 and the cam projection 18
Means the erroneous operation prevention means, and details thereof will be described later.
With the opening operation of the valve operating lever 17 from the valve closing position to the valve opening position in accordance with the start of plug-in to the male coupling member 41, the coupling mechanism 21 and, consequently, the fluid pressure purge mechanism 31 are moved. By sliding the male joint member 41 from the valve-closed position to the valve-open position, the male joint member 41 can be connected.
In accordance with the plug-in connection of No. 1, the joint mechanism 21 is slid and rotated by a required angle, and the valve closing position of the valve operating lever 17 from the valve-opening position (plug-in connection state). After the holding of the male joint member 41 is completed.
The operation of the fluid pressure purge by the fluid pressure purge mechanism 31 in the connection state is restricted, and as a result, the pipe mechanism body 1 from the joint mechanism 21 by the joint mechanism 21 after the valve closing operation of the valve operation lever 17 is left as it is. The plug-out of the male joint member 41 is disabled, and the plug-out after purging the internal pressure by the rotation return operation of the joint mechanism 21 is enabled as described later.

Accordingly, in the case of the opening / closing valve operating mechanism section 11 having the above-described configuration, the pipe joint body 1 shown in FIGS.
In the closed state where the plug-in connection of the male joint member 41 to the is not made, the stop piece 20 of the lever base plate 16 is located on the one end face side of the rectangular tubular surface 1a in the axial direction of the pipe joint body 1. The contact position, in other words, the ball valve member 13 is held at the valve closed position, and the guide cam surface 1
9 is held at a non-restraining restriction position with respect to the fluid pressure purge mechanism 31, and the cam projection 18 is engaged with the fluid pressure purge mechanism 31 as described later, and is in a plug-in standby state.

Subsequently, in the valve open state where the plug-in connection of the male joint member 41 to the pipe joint body 1 shown in FIGS. The valve operating lever 17 is rotated to a position where the stop piece 20 of the lever base plate 16 abuts against the other end surface side of the rectangular tubular surface 1a, in this case, a position parallel to the axial direction, and the ball valve member 13 opens. Is operated and held at the position, the guide cam surface 19 is held at the restraint restricting position for restraining the operation of the fluid pressure purge mechanism portion 31, and the cam projection 1 is held.
8, the fluid pressure purge mechanism 31 is rotated and deviated by a predetermined angle, and then is moved to and held at a non-restraining restriction position with respect to the fluid pressure purge mechanism 31. The flow of the pressurized fluid from the flow path to the flow path on the male joint member 41 side becomes possible.

In the valve-closed state shown in FIG. 7 in which the male fitting member 41 is plugged in to the pipe fitting main body 1 with respect to the axial direction of the pipe fitting main body 1, the lever board is closed. 16 stop pieces 20 are square cylindrical surfaces 1
a, the ball valve member 13 is held at the valve-closing position again.
The guide cam surface 19 is held at a non-regulating position with respect to the fluid pressure purging mechanism portion 31, and the cam projection 18 is held at a restraining regulation position with respect to the fluid pressure purging mechanism portion 31, as will be described later. This enables plug-out after purging of the internal pressure by the return operation of the rotational displacement of the.

Next, as shown in FIG. 1, the joint mechanism portion 21 includes a restraint member (engagement holding means and release means) screwed to the outer end side of the pipe joint body 1. Part) 22
And a female joint member (other part of the engagement holding means) 23 slidably fitted on the inner peripheral surface of the restraining member 22, and slidably fitted on the outer peripheral surface of the restraining member 22. (The other part of the release means) 24.

Here, the restraining member 22 has pressing surfaces 22a on the inner peripheral surface and the inner peripheral surface on the outer end side, respectively.
22b, and each of the pressing surfaces 22a, 22b
An engagement ball (common to the engagement holding means and the release means) 25 is inserted into each of the inner engagement holes 22c adjacent to the inner side.

The female joint member 23 has a constraining surface 23a on its outer end surface and a tapered surface 23 on its inner peripheral surface.
b, an annular shape in which an extruded surface 23c is formed on the outer peripheral surface. The female joint member 23 is provided between the outer peripheral surface of the pipe joint body 1 and the pressing spring 2 on the inner peripheral surface side.
6, the restraining surface 23a is brought into contact with the pressing surface 22a of the restraining member 22, the sliding thereof is restrained, and the pushing surface 23c is moved by the engaging balls 25 of the restraining member 22. Is extruded to the outer peripheral side to partially expose.
In this case, the pressing spring 26 that applies a pressing action to the female joint member 23 does not also serve to close the valve portion as in the conventional case described above, but simply the female joint member. Since only 23 is repressed, it is not necessary to maintain a strong pressing force.

Further, the releasing member 24 has a slanted cam surface 24a formed inside the outer end surface, and the cam surface 2 is formed.
A pressing surface 24b is formed on the inner peripheral surface on the inner end surface side connected to 4a, and an inner edge 24c is formed on the inner end surface. The release member 24 is partially exposed to the outer peripheral side of the restraining member 22 by interposing a pressing spring 27 on the inner peripheral surface side between the outer end surface of the pipe joint body 1 and the main release member 24. Combined ball 25
Against the cam surface 24a.

On the other hand, the male joint member 41 plug-in connected to the female joint member 23 in the pipe joint body 1 is shown in FIG.
As shown in the figure, the secondary side internal flow path 4
2 and the outer peripheral surface 41a sealed by the seal ring 8 and the tapered surface 23 from the connection end side.
The engagement groove 41c for engaging the respective engagement balls 25 with the tapered surface 41b abutting on b.

Accordingly, in the case of the joint mechanism 21 having the above-described configuration, in the valve-closed state where the male joint member 41 is not plugged in to the pipe joint body 1 shown in FIGS. As a result, the restraining surface 23a of the female joint member 23 is brought into contact with the pressing surface 22a on the inner circumferential surface side of the restraining member 22, and the pushing surface 23c moves the engaging balls 25 of the restraining member 22 toward the outer circumferential side. And the release member 24 is pressed to the outer end surface side by the pressing spring 27 so that the cam surface 24 a
The release member 24 is maintained in the valve closed position by being brought into contact with the exposed portion of.

Subsequently, in the valve-open state in which the male joint member 41 is plugged in to the pipe joint body 1 shown in FIGS. 4 to 6, the female joint member 23 is in the non-connection closed state. On the other hand, the pressing spring 26
Of the male joint member 41 against the pressing force of the male joint member 41, the outer peripheral surface 41a of the male joint member 41 is sealed by the seal ring 8 in the pipe joint body 1 and the tapered surface is formed. 41b is brought into contact with the tapered surface 23b of the female joint member 23, and with the movement of the pushing surface 23c of the female joint member 23, the restraint of each engagement ball 25 of the restraint member 22 is released. Later, the respective engaging balls 25 fall into the engaging grooves 41c of the male joint member 41 and are engaged by the cam action of the cam surface 24a of the releasing member 24 pressed by the pressing spring 27, and the release is performed. Member 24
Moves to the valve opening position and is held by the pressing surface 24b, and further, the cam surface 24a is brought into contact with the pressing surface 22b on the outer peripheral surface side to shift to the connection open state. In this connection open state, The pressurized fluid flows from the primary flow path 2 to the secondary flow path 42 via the valve section.

Further, in order to shift from the connection open state to the non-connection closed state again, the release member 24 moving to the valve open position is closed against the pressing force of the pressing spring 27. The engagement groove 41c of each engagement ball 25 is moved by moving the release member 24 to the valve closing position.
Is released, the female joint member 23 is automatically returned to the original state by the pressing force of the pressing spring 26 to perform the valve closing action. In the valve closed state, The male joint member 41 can be easily extracted from the female joint member 23.

Next, the fluid pressure purging mechanism 31 is slidably fitted on the cylindrical surface 1b of the pipe joint body 1 and is located on the inner peripheral surface of the pipe joint main body 1. A cylindrical purge member 32 provided with a set of seal rings 33 at a position where the peripheral surface seal is formed straddling each of the purge holes 9 and the peripheral surface seal is released in the non-connection closed state. The outer edge 32a of the cylindrical purge member 32 corresponding to the outer end surface side can be brought into contact with the inner edge 24c of the release member 24 in the connection open state, and the inner edge surface side of the tubular purge member 32 corresponds to the inner end surface side. After the inner edge 32b is guided by the erroneous operation preventing cam plate 15 linked to the valve operating handle 16 and moves in the non-connection closed state, the inner edge 32b contacts the regulating cam surface 15b and is held at the moving position. It is supposed to be.

Accordingly, in the case of the fluid pressure purge mechanism 31 having the above-described configuration, the pipe joint body 1 shown in FIGS.
In the closed state where the male joint member 41 is not plugged-in to the female joint member 41, the plug-in connection of the male joint member 41 to the female joint member 23 is not made and the release member 24 is closed. , The peripheral surfaces of the respective purge holes 9 are not sealed by the respective seal rings 33 of the cylindrical purge member 32, and the erroneous operation prevention cam plate is provided because the valve operation handle 16 is in the valve closing position. Fifteen
Is not regulated by the regulating cam surface 15b.

Further, in the connection open state where the plug-in connection of the male joint member 41 to the pipe joint body 1 shown in FIGS. 4 to 6 is not made, the male joint member 41 to the female joint member 23 is opened. When the valve operating handle 16 is actuated to the valve opening position, the tubular purge member 32 is guided to the erroneous operation prevention cam plate 15 and moved to the intended position. At the same time, the peripheral surface of each purge hole 9 is sealed by each seal ring 33 by being regulated by the regulation cam surface 15b, and at the same time, the release member 24 is moved and restrained to the valve opening position to prevent the erroneous operation. Become.

As described above, in the plug-in connection type pipe joint device with an on-off valve according to the structure of this embodiment, the male joint member 41 is plug-in connected to the female joint member 23 of the pipe joint body 1. And with respect to the male joint member 41,
When the connection state is maintained by the engagement and restraint of the joint mechanism section 21 and the opening and closing valve operating mechanism section 11 is opened in the connected state, the internal flow path 2 in the pipe joint body 1 and the male joint member 41 are opened. The inside of the secondary side internal flow path 42 is communicated and the valve shifts to an open state, and the restricting operation of the fluid pressure purge mechanism 31 is performed in connection with the valve opening operation of the open / close valve operating mechanism 11. Then, the purging action in the secondary side internal flow path is automatically closed, and at the same time, the connection state of the joint mechanism 21 is also automatically restricted, and thereafter, the opening / closing valve operation is performed. Unless the mechanism unit 11 is closed, the connection state cannot be released.

When the valve opening / closing valve operating mechanism 11 is closed with the valve open, the internal flow path 2 in the pipe joint body 1 and the secondary internal flow path in the male joint member 41 are opened. 42
The gap is shut off and the valve shifts to the valve-closed state, and the release of the restraint of the fluid-pressure purge mechanism 31 in conjunction with the valve-closing operation is performed. The joint mechanism 21 can be operated together. As a result, when the joint mechanism 21 is released, the fluid pressure purge mechanism 31 is also automatically operated at the same time. After the purging action in the inside has been performed, the male joint member 41 can be withdrawn very easily from the female joint member 23.

Although a spherical valve, that is, a ball valve, is used as the on-off valve, any other on-off valve such as a cock type or a butterfly type may be used. Functions and effects can be obtained.

[0053]

As described above in detail with reference to the embodiments,
According to the present invention, a male joint member having a secondary side flow path is plugged into a female type joint member having a flow path capable of communicating with the primary side flow path in the pipe joint body. In a pipe joint device for a pressurized fluid that is maintained in a connection state in which the secondary side fluid pressure cannot be purged and is plugged out to a non-connection state in which the secondary side fluid pressure can be purged, the primary side flow in the pipe joint body An on-off valve operating mechanism section having an on-off valve for opening and closing a passage and provided with each of first and second cam means interlocking with the opening and closing operation of the on-off valve, and engaging with the first cam means. Cylinder held at a non-connecting position where fluid pressure can be purged, and which is slidably restrained in a connected state where fluid pressure cannot be purged by contacting the second cam means after being rotated by the first cam means. Fluid pressure purging mechanism section having a cylindrical purging member, and a female joint member The engagement and holding means for independently holding the male joint member in the connected state while restraining the operation of the on-off valve operating mechanism via the fluid pressure purge mechanism, and the engagement of the male joint member by the engagement and holding means The holding mechanism is restrained, and the locking mechanism is operated via the fluid pressure purge mechanism. The coupling mechanism is provided with a release mechanism for releasing the holding state when the fluid pressure purge mechanism returns. Therefore, the following practically excellent effects can be obtained.

(1) In the unconnected state in which the male joint member is plugged out of the pipe joint main body, since the opening operation of the on-off valve operating mechanism is restricted, the closing of the pressurized fluid on the primary side is ensured. In addition, the secondary side is maintained to be purgeable.

(2) In the non-connection state, the valve opening operation can be performed by plug-in connection of the male joint member to the female joint member, and the valve opening operation by the on-off valve operating mechanism unit causes the valve to open and close. The purge member can be pivotally displaced and slid to open the valve in a state where the purge cannot be performed, and plug-out of the male joint member can be disabled.

(3) In the connected state, with the valve closing operation by the on-off valve operating mechanism, the cylindrical purge member is slid back to the non-connection position and the fluid pressure remaining in the secondary flow path is purged. Then, the rotational displacement of the cylindrical purge member is returned to the original position and the position is restrained again, that is, the sliding return of the cylindrical purge member due to the valve closing operation and the return of the cylindrical purge member to the deviation. The two-step operation enables the male joint member to be plugged out for the first time after purging the secondary fluid pressure, completely avoiding the danger of erroneous operation. You can do it.

That is, to summarize the above, in the present invention, the opening / closing valve of the internal flow path is opened / closed by the opening / closing valve operation mechanism portion, and the male joint member is connected and held to the female joint member by the joint mechanism portion.
The connection release and the closing and opening of the purge of the secondary fluid pressure by the fluid pressure purge mechanism can be performed independently of each other and automatically in relation to each other. In the independent configuration, the individual structure of each mechanism can be simplified as a whole, and the operation itself is extremely easy, and particularly, the connection and holding of the male joint member to the female joint member of the joint mechanism can be improved. Accordingly, the valve can be opened, and the secondary fluid pressure can be purged before the connection is released. Further, the connection can be released by performing the operation in two stages. Danger can be eliminated, and at the same time, there is an excellent feature that the operation can be performed smoothly and quickly with a small operation force without requiring any further operation force.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional side view showing a schematic configuration of a valve-closed state in which a male joint member of a plug-in connection type pipe joint device with an on-off valve according to an embodiment of the present invention is not connected.

FIG. 2 is an overall side view showing a schematic configuration of a valve-closed state due to disconnection of a male joint member in the embodiment.

FIG. 3 is a partial plan view showing a connection relationship between an opening / closing valve operation mechanism section and a fluid pressure purge mechanism section in a non-connection closed valve state in the embodiment.

FIG. 4 is an overall vertical cross-sectional side view showing a schematic configuration of a valve-opening state accompanying plug-in connection of the male joint member in the embodiment.

FIG. 5 is an overall side view showing a schematic configuration of a valve-opened state associated with the plug-in connection of the male joint member in the embodiment.

FIG. 6 is a partial plan view showing a connection relationship between an opening / closing valve operating mechanism and a fluid pressure purge mechanism in an open state with the male joint member plugged in in the embodiment.

FIG. 7 is a partial plan view showing the connection between the on-off valve operating mechanism and the fluid pressure purge mechanism in a closed state when the male joint member is plugged out in the embodiment.

FIG. 8 is an overall longitudinal side view showing a schematic configuration of a conventional plug-in connection type pipe fitting device with an open / close valve, which is partially cut into a non-connection closed state (upper half) and a connection open state (lower half). FIG.

[Explanation of symbols]

 1 Pipe Joint Main Body 1a Square Cylindrical Surface 1b Cylindrical Surface 2 Primary Side Flow Path 3 Connection Pipe 4 Introductory Flow Path 5 Communication Space 6 Valve Shaft Hole 7 Step 8 Seal Ring 9 Purge Hole 11 Open / Close Valve Operating Mechanism 12 Valve Seat Member 13 Ball valve member 13a Valve flow path 14 Valve shaft 14a Valve seal 15 Cap nut 16 Lever base plate 17 Valve operating lever 18 Cam projection (first cam means) 19 Induction cam surface (second cam means) 20 Stop piece 21 Joint mechanism part 22 Restraint member (part of engagement holding means and release means) 22a, 22b Pushing surface 22c Engagement hole 23 Female joint member (other part of engagement holding means) 23a Restraint surface 23b Tapered surface 23c Pushing surface 24 Release member (other part of releasing means) 24a Cam surface 24b Pressing surface 24c Inner end edge 25 Engaging ball (common to engaging holding means and releasing means) 26, 27 Pressing spring 31 Fluid Purging Mechanism Section 32 Cylindrical Purging Member 32a Outer Edge 32b Inner Edge 33 Seal Ring 41 Male Joint Member 41a Outer Surface 41b Tapered Surface 41c Engagement Groove 42 Internal Channel

Claims (3)

[Claims] 1. A male joint member having a secondary passage formed therein is plugged into a female joint member having a passage that can communicate with a primary passage in a pipe joint body. A pipe joint device for pressurized fluid, which is maintained in a connected state in which the side fluid pressure cannot be purged, and is plugged out to be in a disconnected state in which the secondary fluid pressure can be purged, wherein: An on-off valve operating mechanism having an on-off valve for opening and closing the primary flow path, and first and second cam means respectively associated with opening and closing operations of the on-off valve; A connection state in which the first cam means is engaged with the cam means and is held at a non-connection position capable of purging the fluid pressure, and which is in contact with the second cam means after the rotation operation of the first cam means so that the fluid pressure cannot be purged. Fluid pressure purge mechanism provided with a cylindrical purge member that is slidably restrained on the female joint member Engagement holding means for holding the open / close valve operating mechanism via the fluid pressure purge mechanism in the disconnected state, and independently holding the male joint member in the connected state; and Release means for restraining the holding state of the male joint member by the engagement holding means and being restrained by the fluid pressure purge mechanism to release the held state with the return of the fluid pressure purge mechanism. A plug-in connection type pipe joint device with an on-off valve, wherein a joint mechanism provided for each is incorporated. 2. The plug-in connection with an on-off valve according to claim 1, wherein said first cam means is a cam projection which removably engages with a notch recess of said cylindrical purge member. Type pipe fitting device. 3. The plug with an on-off valve according to claim 1, wherein said second cam means is an induction cam surface which comes into contact with said cylindrical purge member so as to be able to come and go, and is slidably restrained. In connection type pipe fitting device.