JP2743265B2 - Plug-in connection type pipe fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an internal flow passage by plugging an external male joint member into a female joint member provided in an internal flow passage for introducing a pressurized fluid in a pipe joint body. And a plug-in connection type pipe joint device with an on-off valve that allows the introduced pressurized fluid to be led out.More specifically, the pipe joint body is restricted in a valve closing position while the pipe joint body is constrained to a valve closing position. By making a plug-in connection of the male joint member to the female joint member, the plug-in connection state is automatically restricted, and based on the connection restriction, a manual operation of the opening / closing valve portion built in the pipe joint body is performed. By opening the connection flow path by operation, the valve opening state is automatically restrained and the pressurized fluid can be led out, and the pipe joint is released with manual release from the valve opening state. Removal of residual internal pressure in the body and continued Those relating to improvement of the manual restraint released combined plug out leaving the way may make on-off valve with plug-in connection type pipe coupling device from the connected state.

[0002]

2. Description of the Related Art Conventionally, this type of plug-in connection type pipe joint device with an on-off valve, that is, in this case, a female joint member provided in an internal flow passage for drawing out a pressurized fluid of a pipe joint body. By manually plugging-in a male joint member for introducing an external pressurized fluid, the on-off valve equivalent part is automatically opened to allow the pressurized fluid to be led out, and the restraining means is used. The connection opening state is restrained and maintained, and while the connection opening state is maintained, the release means is manually operated to release the restraint by the restraining means and manually release the male joint member. In a plug-in connection type pipe joint device with an on-off valve that is configured to be plugged out, the internal flow path of the pipe joint body, here, a flow path for introducing a pressurized fluid, and the pressurized fluid are derived. An on-off valve mechanism is interposed between In addition, maintaining the closed state by pressing the valve body against the valve seat of the opening / closing valve mechanism is performed by an integrated pressing force of the spring pressure by the valve spring from the introduction flow path side and the fluid pressure of the pressurized fluid. Is a general form.

[0003] The connection of the female joint member in the outlet side flow passage to the male joint member in the pipe joint main body having the inlet side flow passage is in opposition to the combined pressure of the spring pressure and the fluid pressure. By performing plug-in connection with the pushing force applied, the on-off valve is opened to perform the operation. On the other hand, with respect to detachment of the pipe joint body from the male joint member, similarly, the spring pressure and the fluid pressure The plug-out is released by pulling out the on-off valve while the valve is closed by the integrated pressure, and the residual pressure purge performed prior to the release is usually performed through a gap between the constituent members.

[0004]

However, in the case of the above-mentioned conventional plug-in connection type pipe joint device with an on-off valve, the structure itself of the on-off valve mechanism formed in the pipe joint body and the on-off valve Holding the connection to the mechanism after opening the valve,
The respective structures of the restraining mechanism and the releasing mechanism for releasing the restraint prior to the valve closing and disconnection are relatively complicated, and the opening / closing valve mechanism, the restraining mechanism and the releasing mechanism are each required. In addition to the number of parts that make up
The connection and opening / closing operation have an undesired disadvantage that the pressure of the introduced pressurized fluid is affected.At the same time, the residual pressure to be purged is scattered around, and depending on the properties of the controlled pressurized fluid, There were various problems such as fouling or even danger.

[0005] The present invention has been made to solve such a conventional problem.
The open / close valve mechanism, the restraining mechanism, and the release mechanism are individually configured with a simple and small number of parts, and the internal flow path is opened and closed without being affected by the pressurized fluid pressure. This type of plug-in connection type pipe with an on-off valve is designed to realize the correctness and ease of operation of holding and restraint release, and to purify the residual pressure only in a specific direction. It is to provide a coupling device.

[0006]

According to a first aspect of the present invention, a plug-in type pipe joint device according to the present invention comprises a valve path seal on each of a connection side and a connection side. A pipe joint body provided with an on-off valve portion between the internal flow paths divided by a via, and a male joint member externally provided with respect to a female joint member disposed in a connection-side internal flow path of the pipe joint body. And a plug-in connection restraining mechanism provided with an engagement member for restraining and holding the male joint member at the connection position, wherein the pipe joint body includes the female mold A first resilient means for constantly resiliently pressing the joint member toward the non-connecting side; the resilient pressure of the first resilient means holding the engaging member on the non-restricted side when disconnected and toward the restricted side when connected; A joint mechanism for releasing and constraining the male joint member connected against the elastic pressure; An opening / closing operation member for selectively opening / closing an opening / closing valve portion to a valve closing position side through a valve path seal and a flow path seal, and being separated from the connection side internal flow path via a purge seal; An opening / closing valve mechanism provided with a purge-out portion for purging out the inside of the connection-side internal flow path in a predetermined external direction at a valve-closing position; A valve-opening restricting mechanism that is released when disengaged, and a releasing member that is connected to the engaging member and the opening / closing operation member, and a second resilient unit that constantly presses the releasing member toward the restricting side is provided. A release mechanism for restricting the operation member to the valve closing position when disconnected and releasing it when connected to enable the valve opening and closing operations is incorporated.

Therefore, in the plug-in connection type pipe joint device according to the first aspect, a male joint from the outside with respect to the female joint member of the joint mechanism portion while the pipe joint body is kept in the non-connection closed state. The plug-in connection of the members and the restriction at the connection position by the engaging member are possible, and the opening / closing valve section can be arbitrarily operated by operating the opening / closing operation member at the opening / closing valve mechanism section under the restriction control of the opening / closing restriction mechanism section. The valve can be selectively opened and closed, and the operation of the release member at the release mechanism releases the engagement and holding of the male joint member, so that the male joint member can be plugged out and disconnected after connection. Prior to this, the residual pressure can be specified and purged in a set direction.

According to a second aspect of the present invention, there is provided a plug-in connection type pipe joint device which opens and closes between respective internal flow paths which are separated via a valve path seal on each of a connection side and a connection side. A pipe joint body provided with a valve portion, a male joint member externally plugged into a female joint member disposed in a connection-side internal flow path of the pipe joint body, and the male joint member A pipe joint device having a plug-in connection restricting mechanism provided with an engaging member for restricting and holding the female joint member at a connection position, wherein the female joint member is constantly pressed against the pipe joint body toward the non-connection side. A first resilient means for holding the engaging member on the non-restraining side when the connection member is not connected by the resilient pressure of the first resilient means, and releasing the engaging member to the restraining side when the connection member is connected to resist the resilient pressure; The joint mechanism for restraining the male joint member is opened via the valve seals and the flow path seals. An opening / closing operation member for selectively switching a valve portion to a valve-opening and valve-closing position side, wherein the valve portion is divided via the one valve passage seal between the valve-side internal flow passage and the valve-closing position; An opening / closing valve mechanism provided with a purge-out portion for purging out the inside of the connection-side internal flow path in a predetermined external direction; and a valve opening for restraining the opening / closing operation member at the valve-opening position at the time of the connection and releasing at the time of disconnection after the connection. A restraining mechanism, a release member connected to the engaging member and the opening and closing operation member, and a second resilient means for constantly pressing the release member toward the restraining side; and closing the opening and closing operation member when not connected. A release mechanism that restricts the valve position and releases the valve at the time of connection to open and close the valve is provided.

Therefore, the plug-in connection type pipe joint device according to the second aspect is completely different from the case of the plug-in connection type pipe coupling device according to the first embodiment, except that one valve path seal can also serve as a purge seal. A similar effect is obtained.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a plug-in connection type pipe joint device according to the present invention. FIG.

First, a description will be given of a plug-in connection type pipe joint device to which a first embodiment of the present invention is applied.

FIGS. 1, 2, 3 and 4 show the external appearance of a plug-in connection type pipe joint device to which a first embodiment of the present invention is applied, and FIG. The pipe joint body in the closed state before the connection of the mold joint member is in the upper half, and the pipe joint body in the open state after the engagement and restraint of the male joint member to the female joint member is in the lower half. FIG. 2 is an overall side view showing the pipe joint body in a valve-closed state after connection engagement and restraint of the male joint member with the female joint member, respectively. Also, FIG. 3 shows that the valve closing state corresponding to FIG.
FIG. 4 is a partially enlarged longitudinal sectional view showing the valve closing state corresponding to FIG. 2 by 90 ° after the angle has been converted by 90 ° and showing only the upper half. It is.

That is, FIGS. 1, 2 and 3, and FIG.
In the configuration of the first embodiment shown in FIG. 1, the plug-in connection type pipe joint device is provided with a pipe joint body A in which an on-off valve portion B is disposed in an internal flow path.
A joint mechanism C for plug-in connection of the male joint member 101 to be connected, and a male joint member 1 by the joint mechanism C
01 and a plug-in connection restricting mechanism D for restricting and holding the plug-in connection state of the male joint member 101 by the plug-in connection restricting mechanism D after the plug-in connection restriction of the male joint member 101 from the outside. In addition, the opening / closing valve mechanism E including the purge-out portion F for purging the residual pressure at the time of closing the valve in a predetermined direction, the valve opening state by the opening / closing valve mechanism E is restrained and released, and the restrained holding is released. A valve opening restraint mechanism G;
After the closed state of the on-off valve mechanism E is restrained and held, the male joint member 10 by the plug-in connection restraining mechanism D
And a release mechanism H for releasing the restraint holding and allowing the plug-out to be detached. The release mechanism H is incorporated into each of these mechanisms C to E, G, and H so that they can be linked and operated. Make up the whole.

In the case of the first embodiment, the joint mechanism C includes a part of the plug-in connection restraining mechanism D, and the release mechanism H includes the plug The other part of the in-connection restraining mechanism D is included. In addition, depending on the opening / closing valve mechanism E and the valve opening restraining mechanism G facing the outside, the male joint member 10
The valve closing state (corresponding to each upper half in FIGS. 1 and 3) is maintained before the plug-in connection (1), and the manual operation after plug-in connection (corresponding to the valve closing state in FIGS. 2 and 4) is performed. Opening (corresponding to each lower half of FIGS. 1 and 3) and closing (corresponding to each upper half of FIGS. 1 and 3) of the on-off valve portion B by operation are both enabled, and Maintaining the valve-closed state (corresponding to each upper half in FIGS. 1 and 3) upon disconnection of the plug-out, and purging out the residual pressure in a predetermined external direction (similarly, each upper half in FIGS. 1 and 3) Applies). Further, depending on the release mechanism H facing the outside, the plug-in connection of the male joint member 101 to the plug-in connection restraining mechanism D during the plug-in connection (corresponding to the valve closed state in FIGS. 2 and 4). The restraint holding operation by automatic operation and the restraint release operation by manual operation when the male joint member 101 is unplugged from the plug-in connection restraining mechanism D (corresponding to each upper half in FIGS. 1 and 3). Are enabled together. Here, the pressurized fluid to be controlled is constantly introduced into the pipe joint body A, and the plug-in connection operation of the male joint member 101 and the opening / closing of the opening / closing valve mechanism E after the plug-in connection are performed. With the operation, it is drawn out from the male joint member 101 side.

On the other hand, the male-type joint member 101 has a connection-side internal flow path 102 and has a distal-end connecting portion 103 and a tapered pressing surface 104 for connecting to a female-type joint member, which will be described later. An engaging circumferential groove 105 for restraining and holding a part of each engaging ball at the connection valve opening position is formed respectively.

The pipe joint body A includes a main body member 11 having a hollow cylindrical shape, a valve member 21 substantially forming the on-off valve portion B, and a restraining member 31. Are integrally joined together by screwing and tightening therebetween, and are commonly provided inside the hollow body in the axial direction. To form a primary side internal flow path 10a with
In addition, the other side of the valve member 21 (the downstream side of the pressurized fluid to the supplied portion) and the restricting member 31 form a secondary-side internal flow path 10b. Between the side internal flow path 10a and the secondary side internal flow path 10b, a valve path that can be controlled to open and close, in other words, the open / close valve portion B is formed.

On the outer peripheral surface side of the main body member 11, a pressurized fluid introduction side (front side), that is, a supply side (hereinafter referred to as a rear side or a rear end) is a discharge side (rear side). Fluid tube (not shown) for introducing a pressurized fluid sequentially to the feeding side (hereinafter referred to as the front side or the front end)
, A male screw portion 13 for screwing a retaining ring member 201 for retaining a fluid tube inserted into the connection beak 12, and an outer peripheral surface of the main body (in this case, preferably, as described later, As one caution signal indicating that the valve is in the open state at the present time, for example, “blue” is displayed on at least the corresponding peripheral surface) 14 and A first threaded surface 16 is formed at an interval between the first and second sliding surfaces 15, and a female screw portion 17 is formed by threading on a front inner peripheral surface corresponding to the primary internal flow passage 10a. A holding hole 18 for setting and arranging the valve-opening restraining mechanism G is formed in a predetermined portion corresponding to the front side in 14 in the radial direction as described later.

The valve member 21 is connected to the primary side internal flow path 1.
0a and the secondary-side internal flow path 10b, and the primary-side internal flow path 10a as the non-operating side of the on-off valve portion B is substantially sandwiched between the partition 22 and the outer peripheral side. And a secondary communication port 24 for communicating and opening the secondary internal flow passage 10b to the outer peripheral side, respectively. Male screw part 25 screwed into female screw part 16 of the main body member 11
Are formed on the outer peripheral surface on the front end side, and the male screw portions 26 are formed by threading.

In each of the outer peripheral grooves on the rear side and the front side across the communication groove 27 for opening the secondary communication port 24, a first seal ring 28 having a Y-shaped cross section is provided.
a and the second seal ring 28b are fitted to each other,
A third seal ring 28c having an O-shaped cross section is fitted in an outer circumferential groove occupying a predetermined position further on the front side than the second seal ring 28b on the front side, and the secondary-side internal flow path is provided. 1
A second sliding surface 29 is formed on the front inner peripheral surface corresponding to 0b. In this case, the first seal ring 28a
The second seal ring 28b with the Y end side facing the primary communication port 23 side (valve path side) that is open to the outer peripheral side.
Are arranged inside seals on the side of the secondary communication port 24 (valve path side) which is opened to communicate with the outer peripheral side, so that each is added from the valve path side which is the respective Y end side. The third seal ring 28c is surely prevented from leaking the pressurized fluid to the opposite side against the fluid pressure, and the third seal ring 28c is described later in the valve-opening position (corresponding to each upper half in FIGS. 1 and 3). A purge hole for purging out residual pressure as a purge-out portion F is sealed inside and outside the flow path.

A third sliding surface 32 is formed on the outer peripheral surface on the rear side of the restraining member 31, and the third sliding surface 32
A ball hole 33 penetrating the inner and outer peripheral surfaces is formed at a plurality of angular positions (in this case, at every 90 °, four angular positions) at equal angular intervals with respect to the position approaching the front side in the above. In each of the ball holes 33, engagement balls 34 which can be selectively protruded to either of the inner and outer peripheral surfaces are loosely fitted, respectively, and the third sliding surface is provided. On the front side at 32
The rearward contact surface 35 is raised according to an operation cam surface of the release mechanism H, which will be described later, in this case, an operation cam surface for operating the plug-in connection restraining mechanism D. On the rear side of the peripheral surface, a female screw portion 36 to be screwed to the male screw portion 26 of the valve member 21 is formed by threading, and further, on the inner surface on the front side of each of the ball holes 33, and facing toward the rear side. An abutment step 37 is formed.

Here, with respect to each of the ball holes 33,
As will be described later, each engagement ball 34 loosely fitted therein is accurately positioned and protruded toward the inner peripheral surface side when the connection valve is opened, and occupies a predetermined position when the connection ball is disconnected and the valve is closed. It is formed in a tapered shape that can easily protrude to the outer peripheral surface side.

The joint mechanism C including a part of the plug-in connection restraining mechanism D is provided on the second sliding surface 2 of the valve member 21.
9 has an annular female joint member 41 in which a fourth sliding surface 42 on the outer peripheral surface is inserted and slidably fitted. A fourth seal ring 43 having an O-shaped cross section for sealing the inside and outside of the secondary-side internal flow path 10b is fitted therein, and an inner circumferential groove formed in an intermediate portion of the inner circumferential surface is fitted with: A fifth seal ring 44 having a flat O-shape in cross section for sealing the inside and outside of the male joint member 101 with the distal end connection portion 103 is fitted therein. After forming a tapered pressure receiving surface 45 for receiving the tapered pressing surface 104 of the mold joint member 101, the front end is abutting end 46.

The female joint member 41 is located in the valve member 21 of the pipe joint body A, and is located between the valve member 21 and an inner end face of the partition 22 corresponding to the secondary internal flow passage 10b. In this state, the first pressing spring 47 is interposed so as to be constantly pressed forward. In this state, as shown in each upper half of FIGS. By the cam action on the lower hemisphere of each of the engaging balls 34 by the surface side edge,
Each of the engagement balls 34 is pushed out to the outer peripheral side, the pushed state of each of the engagement balls 34 is maintained by the fourth sliding surface 42, and the abutting end 46 is
The first abutting step 37 abuts, and as described later, maintains the non-connection closed state.

The opening / closing valve mechanism section E including the purge-out section F is a valve member of the pipe joint body A, in this case, the first
Are provided corresponding to the valve member 21 including the primary side communication port 23 and the secondary side communication port 24 as the non-operating side of the on-off valve portion B which is opened to communicate with the outer peripheral portion with the seal ring 28a as a boundary,
The opening and closing valve portion B serves as an operating side. As shown by broken lines in the upper half and the lower half of FIG. 3, respectively, the primary communication port 23 and the secondary communication port 24 are provided. Opening / closing operation that can be selectively switched to a non-communicating state (valve closed position, corresponding to the upper half of FIG. 3) or a communicating (valve open position, corresponding to the lower half of FIG. 3). It has a member 51.

On the other hand, the opening and closing operation member 51 includes a first outer peripheral surface 16 of the main body member 11 constituting the pipe joint main body A and first, second, and third seal rings 28a and 28b of the valve member 21. , 28c in a state in which the first and second seal rings 2
The first seal ring 52, which has a Y-shaped cross section and is fitted in an inner circumferential groove of the rear inner circumferential surface, is formed by the first sliding member 8a, 28b, 28c. Moving surface 1
5, the rear inner peripheral surface is internally sealed. Further, with respect to the intermediate portion of the inner peripheral surface, the sliding position between the primary side communication port 23 and the secondary side communication port 24 A communication flow path for enabling communication, that is, in other words,
A communication channel 53 for opening and closing the on-off valve portion B is formed. In this case, the sixth seal ring 52
By arranging the Y end side toward the primary communication port 23 which is open to the outer peripheral side, the pressurized fluid flows to the opposite side against the fluid pressure applied from the Y end side. Prevent leaks reliably.

The valve closing position shown in the upper half of each of FIGS. 1 and 3 is located behind the sixth seal ring 52 of the opening / closing operation member 51 so that the body member 11 abuts. An inner peripheral surface 54 extending in the axial direction is formed with an inner peripheral surface step 54a abutted against the step portion 15 formed therein.
The guide slot 55 is formed to penetrate the rear end edge, and the extension of the guide slot 55 is partially included, and the guide slot 55 is required in the axial direction through the engaging step 56a of the inner peripheral end face. An engaging inner peripheral surface 56 occupying the area is formed. In this case, the rear extension portion of the opening / closing operation member 51 is provided at least at the outer peripheral surface of the main body member 11 (the surface indicated by “blue”) at the valve closing position shown in each upper half of FIGS. ) 14
Is set to such an extent that it is covered (the "blue" display is not exposed) and partially opened (the "blue" display is exposed) at the valve opening position shown in the lower half of FIG. The range of formation of the engagement inner peripheral surface 56 including the engagement step portion 56a is regulated by a valve opening restricting mechanism F described later.

Further, on the front side of the communication channel 53 of the opening / closing operation member 51, an inner periphery of the inner periphery sealed by sliding contact with the first, second, and third seal rings 28a, 28b, 28c. A fifth sliding surface 57 is formed, and at the valve closing position shown in each upper half of FIGS.
1 and 3, and occupies a predetermined position sealed out by the third seal ring 28c so as to occupy the fifth sliding surface 57. A purge hole 58 for purging the residual pressure as a purge-out portion F for communicating the inside to the outside is set in a predetermined angular direction and is formed so as to penetrate therethrough.

Here, as shown in each upper half of FIGS. 1 and 3, the location of the opening / closing operation member 51 where the communication flow path 53 is formed is shown in the upper half of FIGS. An outer circumferential groove 27 which is located only on the outer peripheral side of the primary communication port 23 for communicating and opening the passage 10a and opens the secondary communication port 24 for communicating and opening the secondary internal flow passage 10b.
1 is opened to the outside through a purge hole 58, and in the connection-opened state, as shown in each lower half of FIGS. 1 and 3, the outer peripheral portion of the communication groove 27 having the secondary-side communication port 24 opened. , The primary and secondary communication ports 2
The setting is made such that communication can be established between the third and the fourth.

The valve-opening restricting mechanism G is formed by drilling a spring receiving hole 63 from the lower side of the main body 62 and projecting an operation knob 65 to an upper periphery through an engaging shoulder 64. The valve-opening restricting member 61 is inserted into the holding hole 18 formed at a predetermined position on the main body outer peripheral surface 14 of the main body member 11 through a second pressing spring 66. The opening 62 is slidably fitted to constantly resiliently press radially outward, and the operation knob 65 is inserted into the guide slot 55 of the opening and closing operation member 51. 5
The operation end protrudes to the outside through 5. In this case, the engaging shoulder 64 of the valve-opening restricting member 61 is used.
1 and 3 are held fully in the guide slots 55 at the valve closing positions shown in the upper halves of FIGS. 1 and 3 to maintain the non-connected closed state, and the lower halves of FIGS. In the valve-opening position shown in FIG. 5, the engaging inner peripheral surface 56 including the engaging step portion 56a is engaged to restrain the opening / closing operation member 51, and maintains the connected valve-open state as described later.

The releasing mechanism H including the other part of the plug-in connection restraining mechanism D has an annular releasing member 71 which is slidably inserted into the front outer peripheral surface of the opening / closing operation member 51. At the rear end side of the release member 71, a cylindrical portion 73 extended by a predetermined range with an inner peripheral edge 72 abutting the front edge side abutting step 59 of the opening / closing operation member 51 therebetween.
A sixth sliding surface 74 on the inner peripheral surface, which is in sliding contact with the third sliding surface 32 of the restraining member 31, is formed on the front edge side.
After that, an operating cam surface 75 is formed on the inner peripheral front surface. On the other hand, the release member 71 is provided between the front end surface of the valve member 21 and the inner peripheral edge.
By being interposed, it is constantly suppressed forward. In this case, the operating cam surface 75 of the release member 71 is formed on the upper hemispherical surface of each of the engaging balls 34 pushed to the outer peripheral side at the valve closing position shown in each upper half of FIGS. By contacting and restraining from the rear side, the disconnection closed valve state is maintained, the purge hole 58 is exposed outside the cylindrical portion 73, and the valve opening position shown in each lower half of FIGS. Then, the upper hemispherical surface of each of the engaging balls 34 is restrained by the sixth sliding surface 74 to maintain the connection open state, and the purge hole 58 is similarly exposed outside the cylindrical portion 73 here. Let it.

The operation of the apparatus according to the present embodiment having the above configuration is as follows. First, each operation of plug-in connection of the male joint member 101 to the apparatus of this embodiment and opening and closing of the connection flow path will be described.

In the non-connection closed state shown in each upper half of FIGS. 1 and 3, in the joint mechanism C including a part of the plug-in connection restraining mechanism D, the female joint member 41 abuts. The end portion 46 is in contact with the abutting step portion 37 of the restraining member 31 in the pipe joint body A by the elastic force of the first pressing spring 47, and each engaging ball 34 is pushed out to the outer peripheral side. In state.

On the other hand, in the release mechanism H including the other part of the plug-in connection restraining mechanism D, the operating cam surface 75 of the release member 71 abuts on the upper hemisphere of each of the pushed engagement balls 34. And the stored third pressure spring 76
, The engaging balls 34 are constantly pressed toward the inner peripheral surface, and the inner peripheral edge 7 of the release member 71 is pressed.
The communication flow path 53 of the opening / closing operation member 51 as the opening / closing valve mechanism section E whose movement is restricted by 2 is connected to the primary side communication port 23 of the valve member 21 that opens and closes the primary side internal flow path 10a as the opening / closing valve section B. It is located on the outer peripheral side and closes the valve path.

The step 54a of the inner peripheral surface of the opening / closing operation member 51 abuts against the step 15 of the main body member 11, and a part of a purge hole 58 serving as a purge-out portion F is exposed to the outside. Further, the engagement shoulder 64 of the valve-opening restricting member 61 as the valve-opening restricting mechanism G is provided with the opening / closing operation member 5.
1 is pressed against the inner peripheral surface 54.

Therefore, in the valve closed state shown in each upper half of FIGS. 1 and 2, it is impossible for the pressurized fluid introduced into the primary internal flow path 10a to be led out to the secondary internal flow path 10b. Not
Since the opening / closing operation member 51 is restrained by the release member 71, the opening / closing operation member 51 cannot be opened / closed alone. In this case, the “blue” display is covered (not exposed).

Thus, in the non-connection valve-closed state, the joint member 41 of the joint mechanism C is located from the front side of the pipe joint body A.
When the male joint member 101 is inserted in the connection direction, the distal end connecting portion 103 is firstly sealed by the seal ring 44, and then the tapered pressing surface 104 comes into contact with the tapered pressure receiving surface 45. The operation during this time only requires a simple insertion force, and does not require any pressing force.

Subsequently, when the male joint member 101 is further pushed in against the elastic force of the first pressing spring 47,
When the joint member 41 is slid rearward while accumulating the first pressing spring 47, and the abutting end portion 46 has passed the holding position for each of the engagement balls 34, the release mechanism portion H
Under the elastic pressure of the third pressing spring 76, the inner portion of each engaging ball 34 constantly pressed to the inner peripheral surface side by the operating cam surface 75 falls into the engaging peripheral groove 105 and The male joint member 101 is held in contact with the inner surface to secure the male joint member 101 at the corresponding position, and each of the dropped engagement balls 34 is pressed against the elastic force of the first pressing spring 47 which is simultaneously stored. Therefore, the cam member is pressed by the corresponding contact surface toward the outer peripheral surface side.
Each of the engagement balls 34 pressed forward to the outer peripheral surface side while being left (while remaining at the valve closing position)
Is restrained by a sixth sliding surface 74, and the operating cam surface 75 is abutted against the abutting surface 35.
That is, this is the plug-in connection valve closing state shown in FIG. 2 and FIG.

Therefore, in the plug-in connection closed state shown in FIGS. 2 and 4, the restraint by the release member 71 is merely released while the opening / closing operation member 51 is left. The pressurized fluid introduced into the internal flow path 10a is not led out to the secondary-side internal flow path 10b,
On the other hand, the opening / closing operation member 51 is independently restrained by the valve opening restraint member 61 and can be independently moved forward, that is, can be independently opened / closed with respect to the opening / closing valve portion B. And
The pushing operation may be simply performed against the elastic force of the first pressing spring 47, and the primary internal flow path 10
This can be done very easily without any influence from the pressurized fluid introduced into a.

Next, as the release member 71 slides forward in the release mechanism H, the opening / closing operation member 51 left at the valve closing position is pushed in the valve opening direction, here, forward. When the sliding operation is performed until the contact end 59 abuts against the step portion 72, the opening / closing valve portion B is maintained in a closed state by being maintained at the outer peripheral side of the primary communication port 23 until that time. In order for the communicating flow path 53 to move (open) to a position straddling the secondary communication port 24 and thus the communication groove 27,
The primary communication port 23 and the secondary communication port 24, in other words, the primary internal flow path 10a and the secondary internal flow path 10b communicate with each other through the communication flow path 43, and as a result, the open / close valve section is opened. B is opened, and the engaging shoulder 64 of the valve opening restricting member 61 is elastically engaged from the inner peripheral surface 54 into the engaging inner peripheral surface 56 with the transition of the guide groove 55. On the one hand,
The abutting end 59 is abutted against the stepped portion 72 to restrict the opening / closing operation member 51 to the moving position while keeping the release member 71 inoperable (plug-out of the male joint member 101 impossible), and at the same time, , The purge hole 58 is the third seal ring 2
While being sealed out beyond 8c, the restrained state is maintained by the presence of the engagement step 56a. That is,
This is the valve open state shown in each lower half of FIGS. 1 and 3, and the required primary-side internal flow path 1
The pressurized fluid is led out from inside 0a to the inside of the secondary side internal flow path 10b.

In the sliding operation in the valve opening direction, the "blue" display on the outer peripheral surface 14 of the main body is gradually opened (exposed) as the opening / closing operation member 51 shifts in the valve opening direction. To indicate that the pressurized fluid is finally being supplied. At this time, the sliding operation is performed on the primary side internal flow path 1.
This can be done very easily without any influence from the pressurized fluid introduced into Oa.

Next, the operation of disconnecting the male joint member 101 from the apparatus configuration of this embodiment, including closing the connection flow path, will be described.

The plug-out release operation is performed by first opening the valve-opening restricting member 6 with respect to the opening / closing operation member 51.
After releasing the restraint by the first engaging shoulder 64, the opening / closing operation member 51 is closed. That is, the valve opening restraint member 61
By pressing down the operation knob portion 65 protruding to the outside against the elastic force of the second pressing spring 66, the elastic pressure engagement of the engagement shoulder 64 with the engagement inner peripheral surface 56 is released, The open / close operation member 51 is slid backward in the released state until the inner peripheral step 54a abuts against the step 15 to thereby provide a communication passage 53 of the open / close operation member 51.
Returns to the outer peripheral portion side of the primary communication port 23 of the valve member 21 which communicates and opens the primary internal flow path 10a as the on-off valve portion B, and the fifth sliding surface 57 is Channel 10
b is closed to shift to the valve-closed state, and the "blue" indication on the outer peripheral surface 14 of the main body is gradually covered (not exposed) with the shift, and at the same time, the purge hole 58 is communicated with the outer peripheral groove 27. Thus, the residual pressure in the secondary-side internal flow path 10b is automatically purged in a set direction toward the outside before the male joint member 101 is detached from the plug-out.

Next, after the opening and closing operation member 51 is returned to the valve closing position and the residual pressure is purged from the purge hole 58 as described above, the release member 71 is pressed against the elastic pressure of the third pressing spring 76. The rearward sliding operation releases the engagement of the outer portions of the engagement balls 34 by the sixth sliding surface 74 and releases the engagement balls 34.
Is pushed out to the outer peripheral surface side by the applied pressing force to the outer peripheral surface side by the accumulated first pressing spring 47, and is again restrained and held by the operation cam surface 75. In this closed state, the male joint member 101 can be easily pulled out. The operation of moving the release member 71 here may be simply performed against the elastic force of the third pressing spring 76, and the primary-side internal flow path 10
This can be done very easily without any influence from the pressurized fluid introduced into a. That is, the plug-out removal of the male joint member 101 from the required pipe joint body A is completed by the above-described valve closing and restraint releasing operations.

Next, a description will be given of a plug-in connection type pipe joint device to which the second embodiment of the present invention is applied.

FIGS. 5 and 6 show the external appearance of a plug-in connection type pipe joint device to which the second embodiment of the present invention is applied. FIG. 5 shows the structure of the first embodiment. FIG. 6 is an overall enlarged vertical sectional view corresponding to FIG. 3, and FIG.
FIG. 5 is a half enlarged vertical sectional view similarly corresponding to FIG. 4.

Here, in the case of the first embodiment, due to the holding pressure of the pressurized fluid to be handled, the withstand pressure of the purge hole 58 is set such that the Y end is directed toward the flow path. Seal ring 28b which performs an inner sealing function for purging hole 58, and a third seal ring 28 exclusive to purge hole 58.
b, but in the present second embodiment, instead of the second seal ring 28b, a seal ring 81 capable of sealing inside and outside which has a cross section slightly bulged at four corners and capable of sealing inside and outside is provided.
, The third seal ring 28b is eliminated, and the required number of parts can be reduced by one except that the third seal ring 28b has the same configuration as that of the first embodiment, and is identical to the first embodiment. Action and effect are obtained.

[0047]

As described above in detail in each embodiment, according to the plug-in connection type pipe joint device according to the first aspect of the present invention, the connection side and the connection side are provided with valve seals. A pipe joint body provided with an on-off valve portion between each of the divided internal flow paths is provided, and a male joint member is externally plugged into a female joint member disposed in a connection-side internal flow path of the pipe joint body. In a pipe joint device having a plug-in connection restricting mechanism portion provided with an engagement member for making an in-connection and restraining and holding the male joint member at a connection position, the female joint member is not always connected to the pipe joint body. A first elastic pressure means for elastically pressing the engaging member toward the non-constraining side when the engaging member is not connected, and releasing to the constraining side when connecting to engage the male member against the elastic pressure. Opening / closing valve via a joint mechanism that restrains the mold joint member and each valve path seal and flow path seal The valve has an opening / closing operation member for selectively switching to a valve-opening position and a valve-closing position side. An on-off valve mechanism provided with a purge-out portion for purging out in a predetermined direction, an on-off operating member restrained at a valve-opening position during connection, released upon disconnection after connection, an engaging member, and an on-off operation A release member connected to the member, a second resilient means for constantly repressing the release member to the restraining side is provided, and the opening / closing operation member is restrained at the valve-closing position when not connected;
Since the release mechanism that opens and closes the valve when connected is built in, the fitting mechanism is externally connected to the female joint member while the pipe joint body is kept in the disconnected and closed state. The plug-in connection of the male joint member from the connector and the connection at the connection position by the engaging member are possible, and the operation of the opening / closing operation member at the opening / closing valve mechanism under the control of the opening / closing restriction mechanism. The opening / closing valve portion can be optionally opened and closed by operating the release member in the release mechanism, and the engagement holding with the male joint member is released, and the male joint member is plugged out. In addition to this, the residual pressure can be specified and purged in a set direction prior to disconnection after connection, and it has excellent features such as being relatively simple in structure and easy to implement.

According to the plug-in connection type pipe joint device of the second aspect of the present invention, in the plug-in connection type pipe joint device of the first aspect, one of the valve path seals also serves as a purge seal. Therefore, the required number of parts can be reduced, and the same operation and effects as those of the plug-in connection type pipe joint device of the first aspect can be obtained.

[Brief description of the drawings]

FIG. 1 shows an external appearance of a plug-in connection type pipe joint device to which a first embodiment of the present invention is applied, in which an upper half portion of a pipe joint body in a state before a male joint member is connected, It is whole side view which respectively shows the pipe joint main body by the valve opening state after connection engagement of the male joint member to a female joint member at the lower half part, and restraint.

FIG. 2 shows the connection engagement of the male joint member with the female joint member of the plug-in connection type pipe joint device according to the first embodiment.
It is the whole side view which shows the pipe joint main body by the valve closed state after restraint.

FIG. 3 shows the plug-in connection type pipe joint device of the first embodiment converted into a 90 ° angle in the closed state corresponding to FIG. It is a whole expansion longitudinal cross-sectional view each shown in a lower half part.

FIG. 4 is an enlarged half-sectional view of the plug-in connection type pipe joint device according to the first embodiment, showing a valve closing state corresponding to FIG.

5 is an overall enlarged vertical sectional view corresponding to FIG. 3 in a plug-in connection type pipe joint device to which a second embodiment of the present invention is applied.

FIG. 6 is a half enlarged vertical sectional view corresponding to FIG. 4 of the plug-in connection type pipe joint device of the second embodiment.

[Explanation of symbols]

 A Pipe joint body B On-off valve section C Joint mechanism section D Plug-in connection restricting mechanism section E On-off valve mechanism section F Purge out section G Valve opening restricting mechanism section H Release mechanism section 10a Primary internal flow path 10b Secondary internal flow Road 11 Body member 12 Connecting beak 13 Male screw part 14 Body outer peripheral surface 15 Butt step part 16 First sliding surface 17 Female screw part 18 Holding hole 21 Valve member 22 Partition wall 23 Primary communication port 24 Secondary communication port 25, 26 Male thread portion 27 Communication groove 28a, 28b, 28c First, second, third seal ring 29 Second sliding surface 31 Restraining member 32 Third sliding surface 33 Ball hole 34 Engaging ball 35 Abutment surface 36 Female thread portion 37 Butting step portion 41 Female joint member 42 Fourth sliding surface 43, 44 Fourth, fifth seal ring 45 Tapered pressure receiving surface 46 Butting end portion 47 First pressing spring DESCRIPTION OF SYMBOLS 1 Opening / closing operation member 52 6th seal ring 53 Communication channel 54 Inner peripheral surface 54a Inner peripheral surface step 55 Guide long hole 56 Engaging inner peripheral surface 56a Engaging step 57 Fifth sliding surface 58 Purge hole 59 Butting step 61 Opening / closing restraint member 62 Body 63 Spring receiving hole 64 Engagement shoulder 65 Operating knob 66 Second pressing spring 71 Release member 72 Inner peripheral edge 73 Tube 74 Fourth sliding surface 75 Actuation Cam surface 76 Third pressing spring 81 Seal ring instead of second and third seal rings 101 Male joint member 102 Internal connection side flow passage 103 Tip connection portion 104 Tapered pressing surface 105 Engagement peripheral groove 201 Push Ring stopper

Claims (2)

(57) [Claims] 1. A pipe joint body in which an on-off valve portion is disposed between each internal flow path divided via a valve path seal on each of a connection side and a connection side, and a pipe joint body inside the connection side of the pipe joint body is provided. A plug-in connection restricting mechanism portion having an engaging member for externally plug-in connecting a male joint member to a female joint member disposed in a flow path and restraining and holding the male joint member at a connection position. Wherein the pipe joint body has first resilient means for constantly resiliently pressing the female joint member toward the non-connection side, and the first resilient force of the first resilient means. A joint mechanism for holding the engaging member on the non-constrained side when disconnected and releasing it to the constrained side when connected to restrain the male joint member to be connected against the elastic force; An opening / closing operation member for selectively switching the opening / closing valve portion to a valve closing position side via a road seal, An opening / closing valve mechanism section which is separated through a purge seal between the connection-side internal flow path and a purge-out section for purging out the inside of the connection-side internal flow path in a predetermined external direction at a valve closed position; ,
A valve opening restraint mechanism for restraining the opening / closing operation member at the valve opening position at the time of connection and releasing at the time of disconnection after connection, and a release member connected to the engaging member and the opening / closing operation member, A second resilient means for constantly repressing the restraining side is provided, and the opening / closing operation member is restrained at a valve closing position when not connected, and is released when connected to allow a valve opening / closing operation. A plug-in connection type pipe joint device characterized by comprising. 2. A pipe joint body in which an on-off valve portion is arranged between each internal flow path divided via a valve path seal on each of a connection side and a connection side, and the inside of the connection side of the pipe joint body is provided. A plug-in connection restricting mechanism portion having an engaging member for externally plug-in connecting a male joint member to a female joint member disposed in a flow path and restraining and holding the male joint member at a connection position. Wherein the pipe joint body has first resilient means for constantly resiliently pressing the female joint member toward the non-connection side, and the first resilient force of the first resilient means. A joint mechanism for holding the engaging member on the non-constrained side when disconnected and releasing it to the constrained side when connected to restrain the male joint member to be connected against the elastic force; An opening / closing operation member for selectively switching the opening / closing valve portion to a valve closing position side via a road seal, Opening / closing provided with a purge-out portion that is separated from the connection-side internal flow path via the one valve path seal and purges out the connection-side internal flow path in a predetermined external direction at the valve-closing position. A valve mechanism, a valve opening restraint mechanism for restraining the opening / closing operation member at the valve opening position at the time of connection, and releasing at the time of disconnection after connection, and a release member connected to the engagement member and the opening / closing operation member. A second resilient means for constantly repressing the release member toward the restraining side, wherein the opening / closing member is restrained to a valve closing position when not connected, and released when connected to enable a valve opening / closing operation. A plug-in connection type pipe fitting device characterized by comprising a part and a part.