JP2002340266A - Opening and closing valve structure of internal passage opening and closing type pipe joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening and closing valve device contained in a pipe joint device and particularly the opening and closing valve structure of an internal passage opening and closing type pipe joint device capable of simply and precisely replacing an opening and closing valve member to a valve seat member. SOLUTION: In this internal passage opening and closing type pipe joint device, with the plug-in insert connecting operation of the male joint member 70 to the pipe joint body 10, the opening and closing valve member 41 is opened, and the male joint member 70 is anchored and constrained in the opening valve operation corresponding position by an anchoring engagement means, and with the releasing operation for the anchoring constraint, the opening and closing valve member 41 is returned to the valve closing position to enable plug-out separating operation of the male joint member 70. In the pipe joint device, a connecting sleeve 21 and a cylindrical base 11 are respectively provided with an internal passage A1, A2, and with a valve seat member 31 interposed in the interior, the connecting sleeve 21 and the cylindrical base 11 are threaded and connected to constitute the pipe joint body 10. The opening and closing valve member 41 is combined with the valve seat member 31 to constitute an opening and closing valve structure. In replacing the opening and closing valve member 41, the connecting sleeve 21 and the cylindrical base 11 are relatively disconnected to expose the opening and closing valve structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve structure of a pipe joint device for opening and closing an internal flow passage, and more particularly, to a valve seat member, and is normally closed by being resiliently opened and closed by the valve seat member. A pipe joint body containing an on-off valve member maintained in a valve state, a plug-in insertion connection operation in the pipe joint body to open the on-off valve member, and a plug-out release operation to close the valve. In the configuration of the internal flow passage opening / closing type pipe joint device in combination with the male joint member to be made, particularly, in order to cope with wear and the like of each part in the opening / closing valve member due to frequently repeated plug-in and plug-out operations, the above-mentioned structure is adopted. The present invention relates to an improvement of an on-off valve structure which allows an on-off valve member and corresponding parts to be exchanged as easily as possible and allows a pressurized fluid to be handled to flow smoothly and effectively at the time of connection. .

[0002]

2. Description of the Related Art Generally, a pipe joint body of this type is combined with a male joint member, and the male joint member is plugged into and connected to the pipe joint body to open a valve and to be plugged out. Numerous proposals have been made for a so-called one-touch type pipe joint device with an on-off valve device for performing a valve closing operation.

[0003] Next, an outline of a conventional pipe joint device with a one-touch on-off valve device according to an example thereof will be described.

FIG. 17 is a partially cutaway side view showing the schematic structure of a conventional pipe joint body before plug-in connection in a conventional pipe joint apparatus with an on-off valve device. FIG. It is a half-cut side view which shows the aspect after plug-in connection of a type | mold joint member.

In the device configuration shown in FIGS. 17 and 18, the conventional pipe joint device with an on-off valve device has a primary internal flow passage A formed therein. A pipe joint main body 200 having an opening / closing valve device 210 interposed and an outer release member 220 provided on an outer peripheral portion, and a secondary side internal flow path B communicating with the primary side internal flow path A formed therein. In the connection state in which the plug-in is detachably inserted into the connection end of the fitting body 200, the on-off valve device 210 is opened and maintained, and the plug-out is released and closed under the operation of the external release member 220. Male actuating member 230 to be actuated
Consists of

[0006] The base portion of the pipe joint body 200 is composed of a cylindrical base 201 to which a pressurized fluid to be passed, for example, pressurized air from a pressurizing source, is supplied, and the on-off valve device is mounted on the cylindrical base 201. A connection sleeve 202 on the connection insertion end side which is screwed through a valve seat member 211 serving as a valve seat of the connection 210
A plurality of holding holes 203 penetrating both the inner and outer peripheral surfaces are formed in the open connection end side of the connection sleeve 202, and the diameter of each holding hole 203 is larger than the thickness thereof. The retaining hard balls 204 are respectively loosely inserted and held, and the outer peripheral sliding surface 205 is provided on the outer peripheral surface on the connection end side including the outer peripheral opening of each holding hole 203, and the inner peripheral sliding surface 206 is provided on the inner peripheral surface. Are formed, and a stopper ring 207 is provided near the opening end.

Here, an on-off valve member 2 which is combined with the valve seat member 211 to be an on-off valve of the on-off valve device 210
12 has a tapered operating inner surface 213 acting as an opening / closing mechanism for opening and closing the valve seat member 211 and an inner peripheral sliding surface 206 of the connecting sleeve 202. The sliding outer surface 214 that moves and the inner peripheral surface on the connection end side including the inner peripheral opening of each of the holding holes 203, and when the connection is not made (when the plug-out is detached and the valve is closed), each of the holding holes 203 is closed. Close the inner peripheral opening of each ball and retain each hard ball 2
The operation outer surface 21 which holds the first hard disk 204 and opens the inner peripheral opening at the time of connection (at the time of plug-in connection and the valve is in the open state) to allow the later-described pushing of each of the hard balls 204 to the locking operation position.
5 are integrally formed, and further, an introduction opening 216 for introducing and flowing the pressurized fluid supplied at the time of valve opening is opened. The on-off valve member 212 is constantly resiliently pressed by the ridge 217 and maintains the valve-closed state.

The external releasing member 220 slidably disposed on the outer peripheral sliding surface 205 of the connection sleeve 202 is adapted to constantly press each of the retaining hard balls 204 to the inoperative position during the non-connection. And for pressing each of the retaining hard balls 204 in the retaining operation direction at the time of connection, and an inner peripheral surface on the connection end side having an inner diameter slightly larger than the outer diameter of the stopper ring 207. The inclined cam surface 221
And a holding inner peripheral surface 222 is formed so as to be connected to the inclined cam surface 221. Here, the inclined cam surface 22
1 constantly presses each of the retaining hard balls 204 held in the non-operation position on the operation outer surface 215 of the on-off valve member 212 in the retaining operation direction by the resilient pressure of the ridge 223. Each of the retaining hard balls 204 is restrained and held at the retaining operating position.

In the above state, the external release member 2
Numeral 20 is occupied by the ridge 223 and always occupies a position corresponding to non-connection. In the connection operation (plug-in insertion connection operation) described later, each of the retaining hard balls 204 is retained by the inclined cam surface 221 in the retaining operation position. The male joint member 230 is automatically pushed out to hold the male joint member 230 at the valve opening operation position, and at the time of a disconnection operation (plug-out detachment operation), the extrusion is manually released to release the holding restraint. For this purpose, it is slidable on the outer peripheral sliding surface 205.

On the other hand, at the time of plug-in insertion connection, the male joint member 230 has a similarly tapered outer operating surface 231 for abutting against the inner operating surface 213 of the on-off valve member 212 to open the valve. On the connection-side outer peripheral surface 232, a retaining outer peripheral groove 233 which is retained and restrained by each retaining hard ball 204 at the valve opening operation position is formed.

Accordingly, in the case of the conventional apparatus having the above-described configuration, in the pipe joint body 200 in the non-connected state, as shown in FIG. 17, the on-off valve member 212 is pressed against the valve seat member 211 by the elastic force of the spring 217. As a result, the opening / closing valve device 210 is maintained in the closed state to shut off the primary side internal flow path A, and at the same time, the operation outer surface 215 of the opening / closing valve member 212 and the inclined cam surface 221 of the external release member 220 are in contact with each other. Each detained hard ball 204 is held in the inactive position between
, The retaining hard balls 204 are constantly pressed in the retaining operation direction. That is, the on-off valve device 210 is in the closed state with the male joint member 230 plugged out of the pipe joint body 200.

When the male joint member 230 is plugged in to the pipe joint body 200 in the valve closing state of the on-off valve device 210 (see FIG. 18), the male joint member 230 is firstly connected with the operation. The operation outer surface 231 of the joint member 230 abuts against the operation inner surface 213 of the on-off valve member 212, and the pushing operation of the on-off valve member 212 in the connection direction and, consequently, the valve opening direction is started against the elastic force of the sprung 217. .

Subsequently, the retaining hard balls 204 held on the operation outer surface 215 in response to the pushing operation of the on-off valve member 212 cause the inclined cam surface 22
1 is pushed out in the detent operating direction and the operating outer surface 215
At the time when the holding by the holding is released,
4 comes into contact with the connection-side outer peripheral surface 232 of the male joint member 230, and the valve opening action of the on-off valve device 210 continues.

Further, when the on-off valve device 210 is opened as expected, each retaining hard ball 204 falls into the retaining outer peripheral groove 233 of the male joint member 230 to occupy the retaining operation position. The male joint member 230 is retained by being retained by the retaining inner peripheral surface 222 beyond the inclined cam surface 221. As a result, the male joint member 230 is retained at the valve opening position. That is, this state corresponds to the pipe joint body 2 shown in FIG.
00 is a valve-open state of the on-off valve device 210 in which the male joint member 230 is plugged in, and the primary side internal flow path A and the secondary side internal flow path B flow through the introduction opening 216. Maintained as possible. In this valve open state, the operation end of the external release member 220 stands by while protruding toward the connection end beyond the stopper ring 207.

Next, in order for the male joint member 230 to be plugged out of the pipe joint body 200 in the open state of the on-off valve device 210, the end of the external release member 220 protruding toward the connection end side is required. By pressing the portion against the elastic pressure of the spring 223, the restrained holding by the holding inner peripheral surface 222 of each of the retaining hard balls 204 at the retaining operating position is released, and the opening and closing valve member 212 is used. Due to the resilient pressure of the ridge 217 applied to the male joint member 230, each of the retaining hard balls 204 is pushed out of the retaining outer peripheral groove 233 and moves again to the inclined cam surface 221 side. Release of the restraint restraint against
On-off valve device 210 by pulling out the male joint member 230
In other words, the plug-out removal operation of the male joint member 230 can be easily performed.

[0016]

In the case of the above-mentioned conventional pipe joint device with an on-off valve device, the plug-in insertion / connection operation of the male joint member 230 with respect to the pipe joint body 200 and the plug-out detachment operation are frequently repeated. At this time, wear, wear and the like of the corresponding parts, particularly the on-off valve member 212 corresponding to the sliding operation part, and the related parts are generally inevitable with each operation. On the other hand, since the fluid handled by the present apparatus is a relatively high-pressure pressurized fluid, leakage of the pressurized fluid due to this kind of wear, abrasion, etc. hinders the smooth operation of the work itself, and Since it is extremely dangerous, it must be strictly avoided, and as a result, the on-off valve member 212 and corresponding parts need to be replaced and exchanged.

However, in the above-mentioned conventional apparatus, as described above, the opening / closing valve device 212 is operated to open / close the male joint member 230 in response to the plug-in insertion connection / disconnection of the male joint member 230. Components that function as opening and closing mechanisms for the
3, the sliding outer surface 214, and the operating outer surface 215 are formed integrally with each other, and the respective elements are closely associated with the corresponding parts. In order to perform the replacement of the on-off valve member 212 here, After once disassembling the pipe joint device as a whole, the on-off valve member 212 including the respective component elements 213 to 215 is replaced and exchanged, and adjustment of the respective component elements 213 to 215 with the relevant components is performed. What you need,
There is a problem that the replacement work is not always easy and cannot be easily performed.

The present invention has been made in order to solve such a conventional problem.
Provided is an opening / closing valve structure of an internal flow passage opening / closing type pipe joint device capable of easily and accurately exchanging an opening / closing valve member for a valve seat member, particularly, a valve seat member. It is.

[0019]

In order to achieve the above object, according to the present invention, an opening / closing mechanism for opening / closing an opening / closing valve device is separated from an opening / closing valve member and mounted in a pipe joint device. By eliminating the need for adjustment at the time of replacement, the on-off valve member is made into a single unit only for opening and closing the internal flow path, and the base part of the pipe joint device in which the on-off valve member is disposed is disassembled in one operation. This makes it possible to simplify the replacement and replacement.

According to a first aspect of the present invention, there is provided a connection sleeve having a common primary-side internal flow path formed therein and a supply-side cylindrical base, and the connection sleeve is connected to a connection opening of the connection sleeve. Fastening engagement means, operating means for operating the fastening engagement means are arranged, and the cylindrical base is detachably connected to the connection sleeve via a valve seat member, and the valve seat member includes A pipe joint body in which an on-off valve member that constantly occupies the valve closing position and shuts off the primary-side internal flow path is operably opposed to open / close operable, and flows through the primary-side internal flow path;
An operation actuating part for forming a secondary side internal flow path and for performing a plug-in insertion connection operation and a plug-out detachment operation in the connection sleeve, wherein the cylinder part has an operation operating part for operating the operating means; And a male joint member provided with a valve-opening operating portion for opening the on-off valve member. The plug-in insertion connection operation of the male joint member causes the on-off valve member to open. At the same time, the male joint member is restrained and restrained at the valve opening corresponding position by the restraining engagement means, and the opening / closing valve member is returned to the valve closing position along with the release operation of the restraint restraint. An on-off valve structure for an internal flow passage opening-and-closing type pipe joint device capable of detaching the plug-out, wherein the on-off valve member surrounds a valve seal member pressurized against a valve seat surface of the valve seat member. Connection between the valve body and the valve body A passive projection having a cylindrical valve-opening end protruding in a cylindrical shape, which is abutted and pressed by the valve-opening operating portion of the male joint member, and a flow opening having a required opening area formed in the cylindrical portion. It is constituted by a cylindrical portion, and is characterized in that a pressurized fluid can be introduced through the flow opening when the valve is opened.

In the opening / closing valve structure of the internal channel opening / closing type pipe joint device according to the first aspect of the present invention, the operation of the connection sleeve is performed by plug-in insertion connection operation of the male joint member to the pipe joint body while the valve is in the closed state. The means is actuated to actuate the retaining engagement means, which retains and holds the male joint member in the connected position, while simultaneously opening and closing the on-off valve member to maintain the open state. I do. By releasing the retaining operation of the male coupling member by the retaining engagement means in the valve-open state, the plug-out operation of the male coupling member from the pipe joint main body can be performed. With the detachment operation, the on-off valve member operates to close the valve and maintains the closed state. On the other hand, in order to replace or replace the on-off valve member due to wear, abrasion, etc. in each part of the on-off valve member, only one simple operation of removing the cylindrical base from the connection sleeve of the pipe joint body is performed. In the exposed state, the target on-off valve member can be taken out and replaced with a new on-off valve member, and after the replacement is exchanged, it is only necessary to reconnect the cylindrical base to the connection sleeve. It can be easily performed without any relation to the components.

According to a second aspect of the present invention, in the opening / closing valve structure of the internal flow passage opening / closing type pipe joint device according to the first aspect, the male / female member is provided at the annular valve opening operation end of the on / off valve member. It is characterized in that a buffer member for receiving and abutting the valve opening operating portion of the mold coupling member in a buffering manner is detachably provided.

In the opening and closing valve structure of the internal passage opening and closing type pipe joint device according to the second aspect of the present invention, a buffer member for receiving the valve opening operation portion of the male joint member in a buffer manner is attached to and detached from the annular valve opening operation end of the opening and closing valve member. As a result, the abutment of the valve-opening operating portion against the annular valve-opening operation end is effectively mitigated, and a smooth valve-opening operation is performed. Therefore, the durability of the on-off valve member itself is increased, and the buffer member can be replaced by abrasion or the like.

According to a third aspect of the present invention, there is provided a connection sleeve in which a common primary-side internal flow path is formed, and a supply-side cylindrical base body, wherein the connection sleeve has a connection opening. Fastening engagement means, operating means for operating the fastening engagement means are arranged, and the cylindrical base is detachably connected to the connection sleeve via a valve seat member, and the valve seat member includes A pipe joint body in which an on-off valve member that constantly occupies the valve closing position and shuts off the primary-side internal flow path is operably opposed to open / close operable, and flows through the primary-side internal flow path;
An operation actuating part for forming a secondary side internal flow path and for performing a plug-in insertion connection operation and a plug-out detachment operation in the connection sleeve, wherein the cylinder part has an operation operating part for operating the operating means; And a male joint member provided with a valve-opening operating portion for opening the on-off valve member. The plug-in insertion connection operation of the male joint member causes the on-off valve member to open. At the same time, the male joint member is restrained and restrained at the valve opening corresponding position by the restraining engagement means, and the opening / closing valve member is returned to the valve closing position along with the release operation of the restraint restraint. An on-off valve structure for an internal flow passage opening-and-closing type pipe joint device capable of detaching the plug-out, wherein the on-off valve member surrounds a valve seal member pressurized against a valve seat surface of the valve seat member. Connection between the valve body and the valve body And a passive protruding flat plate portion having a plate-shaped valve-opening operation end protruding in a flat plate shape that is abutted and pressed by the valve-opening operation portion of the male joint member. The pressurized fluid can be introduced from both sides of the passively projecting flat plate portion.

In the opening and closing valve structure of the internal flow passage opening and closing type pipe joint device according to the third aspect, the construction of the opening and closing valve member is exactly the same as that of the above first aspect except that the construction is different. The same or substantially the same operation as in the case of 1 is obtained.

According to a fourth aspect of the present invention, in the opening and closing valve structure of the internal flow passage opening and closing type pipe joint device according to the third aspect, the plate-like valve-opening operation end of the on-off valve member is provided with: The male joint member has a cut-off portion at an intermediate portion except for both ends for abutting the valve-opening operation portion and allowing the flow of the pressurized fluid during the valve-opening operation. .

In the opening and closing valve structure of the internal flow passage opening and closing type pipe joint device according to the fourth aspect, a cutout portion is formed at an intermediate portion of the opening and closing valve member except for both operating end portions of the plate-like valve opening operation end. In addition, the flow of the pressurized fluid during the valve opening operation is smoothly performed.

[0028]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a preferred embodiment of an on-off valve structure of an internal flow passage type pipe joint device according to the present invention. FIG.

First, a first embodiment of the present invention will be described.

FIG. 1 shows a schematic structure of the open / close valve structure of the internal passage open / close type pipe joint device to which the first embodiment is applied before plug-in insertion connection (valve closed state), and FIG. FIG. 2B is a half-sectional side view of the same male coupling member, and FIG. 2 is an enlarged view of the retaining mechanism in the closed state of FIG. 3 is a front view of the on-off valve member of FIG. 1A as viewed from the connection end side.

FIG. 4 is a half-cut side view showing a state after the plug-in insertion connection between the pipe joint main body and the male joint member (valve open state) in the first embodiment, and FIG. FIG. 5 is an explanatory cross-sectional view showing, in an enlarged manner, a configuration of a retaining and locking mechanism in a valve open state of FIG. 4. FIG. 6 is a half-cut side view showing a state in which the pipe joint body and the male joint member are in a plug-out detachment (non-connection) preparation state, and FIG. 7 is a locking engagement in the non-connection preparation state in FIG. It is sectional explanatory drawing which expands and shows a mechanism part structure.

In the configuration before plug-in insertion connection shown in FIGS. 1 to 3 (valve closed state), the pipe joint device of the internal flow passage opening / closing type according to the first embodiment has one end side (free end). A required pressurized fluid (pressurized fluid handled by the apparatus, for example, pressurized air, etc.) is supplied from a supply tube from the right end side of the figure to the other end side (the operating end is the left end in the figure). (Corresponding to the part side) is a connection receiving opening end (hereinafter, simply referred to as a connection end), and is provided with an on-off valve device 30 which is always in a non-connected state and is kept resiliently closed in a completely hollow cylindrical shape. A pipe joint body 10 having a configuration and one end side (similarly, a free end corresponding to a left end side in the figure) is connected to a pressurized fluid utilization device (for example, a hand nozzle device for jetting pressurized air as a manually operated tool) And the other end (similarly, the operating end corresponds to the right end in the figure) The on-off valve device 30 is opened in a connection state in which a push-in operation end (hereinafter, simply referred to as an insertion end) 72 and the insertion end 72 is removably inserted and connected into the connection end of the pipe joint body 10. And a male coupling member 70 having a hollow cylindrical configuration that is maintained by valve actuation.

The base portion of the pipe joint body 10 includes a cylindrical base 11 having a hexagonal head portion for fastening on an outer peripheral surface corresponding to a free end portion to which the supply tube is connected, and a valve seat member inside the cylindrical base 11. And a connection sleeve 21 having a hexagonal head portion for fastening on the outer peripheral surface, which is also removably screwed and connected via 31. Is formed, and the primary internal flow path A is divided into a free end flow path A1 and a connection end flow path A2 with the valve seat member 31 as a boundary.
An on-off valve member 41 that is combined with the valve seat member 31 and constitutes the on-off valve device 30 is disposed. Reference numerals 21a and 31a denote seal rings interposed in the respective coupling portions.

Here, a first step portion 12 is formed at an appropriate position on the inner peripheral surface of the cylindrical base 11 toward the connection end.

On the other hand, for the connection sleeve 21,
A female opening / closing member 51 described later in the connection end side channel A2.
In the circumferential direction of the cylindrical portion 22 corresponding to the standby position, a plurality of holding holes that penetrate both the inner and outer circumferential surfaces at equal angular intervals, in this case, for example, ten holding holes 23 are pierced, The retaining hard balls 29 are movably loosely inserted into the holding holes 23, respectively. Further, on the outer peripheral surface of the cylindrical portion 22, an outer peripheral sliding surface 25 that allows a later-described external release member 61 to be slidable by the second step portion 24 that is directed to the connection end side at a required position is formed,
At the connection end side end of the outer peripheral sliding surface 25, a stopper ring 26 that regulates the maximum sliding position range of the external release member 61 after the external release member 61 is fitted is fitted. Further, on the inner peripheral surface of the cylindrical portion 22, a female step opening / closing member 51 described later is slidable by the abutting step 27 which is in contact with the internal opening of each holding hole 23 on the connection end side and goes to the free end side. An inner peripheral sliding surface 28 is formed.

The valve seat member 31 has a hollow ring shape which is sandwiched and fixed between the cylindrical base body 11 and the connection sleeve 21 and forms a part of the primary side internal flow path A.
A tapered valve seat surface 32 which expands toward the free end side, and thus the free end side flow path A1 side, is formed, and a plug-in connection is formed on an inner peripheral surface 33 connected to the valve seat surface 32. At times, a sealing member 34 for sealing out an insertion outer peripheral surface 73 corresponding to an insertion end (valve-opening operating portion) 72 of the cylindrical body portion 71 of the male joint member 70 is attached, and the connection sleeve is provided on an end surface on a connection end side. A third step portion 35 is formed opposite to the abutting step portion 21.

The open / close valve member 41 is, as shown in FIG.
A valve seal member 43 is provided on the connection end side of the valve body portion 42, which comes into contact with the valve seat member 31 so as to be able to move toward and away from the valve and comes into contact with the valve seat surface 32. A plurality of flow openings 46 having a required opening area for introducing a pressurized fluid at the time of valve opening are opened in a cylindrical portion 44 projecting in a cylindrical shape from the connection end side, and the male joint member is formed on the end surface. Insertion end 70
An annular valve-opening operation end 45 is formed opposite to the first end portion of the cylindrical base 11 on the free end side of the valve body portion 42. Support recess 4
7 is formed in an annular shape.

In this case, the on-off valve member 4 of each of the above-described configurations is used.
In FIG. 1, the valve seat member 3 is constantly operated by the elastic force of the first ridge 48.
1 to keep the valve closed.

The female opening / closing member 51 is inserted into the inner peripheral sliding surface 28 of the connection sleeve 21 and is slidably operated by a plug-in insertion connection operation of the male joint member 70. Similarly, it has a hollow cylindrical tubular portion 52, which is located at an appropriate position on the outer peripheral surface of the tubular portion 52, here the sliding surface 53, and the third step portion 35 of the valve seat member 31, and thus the fixed portion And a fourth step portion 54 extending toward the free end side for stretching the second spline 57 therebetween, and the operating inner surface 55 gently expanded in a tapered shape toward the connection end side on the inner peripheral surface main portion. It is formed, and the end on the connection end side is an abutting end face 56.

In this case, the female opening / closing member 51 according to each of the above-described structures is always abutted against the abutting step 27 of the connection sleeve 21 by the elastic force of the second ridge 57 and stands by. By always closing the internal opening of each holding hole 23 on the inner peripheral sliding surface 28 side, each retaining hard ball 29 loosely inserted into each holding hole 23 is held at the non-operation position.

The external release member 61 is fitted on the outer peripheral sliding surface 25 of the connection sleeve 21 and, when the male joint member 70 is inserted and connected by a plug-in, the connection position is in the connection end side direction (at the connection position). The sliding operation is automatically performed in the direction (corresponding to the valve opening operation), whereby the male coupling member 70 is restrained and locked by supporting a locking operation to be described later, and when the plug-out detachment operation is performed, the locking is performed. At the time when the operation is released, the restraint is released and the sliding operation can be manually performed in the free end direction (the direction corresponding to the valve closing operation). A fifth step portion 64 is formed on the inner peripheral operation surface 63 of the cylindrical portion 62 and facing the second step portion 24 of the connection sleeve 21 toward the free end side.
A third ridge 68 is stretched between the step portion 24.

Further, at the connection end side end of the inner peripheral operation surface 63 of the external release member 61, each of the retaining hard balls 29 in the non-operation position is pressed with an inner diameter enough to receive the stopper ring 26. A pressing inner circumferential groove (one pressing surface serving as a pressing action portion) 65 and a pressing inclination which constantly presses each of the retaining hard balls 29 in the retaining mode in the retaining operation direction by the elastic force of the third ridge 68. A cam surface (the other inclined cam surface serving as a pressing portion) 66 is formed. Further, on the free end side of the inner peripheral operating surface 63 adjacent to the pressing inclined cam surface 66, a restricted inner peripheral groove 6 for restricting and retaining each retaining hard ball 29 at the retaining operation position.
7 is formed.

In this case, as shown in FIGS. 1 and 2, the external release member 61 having the above-described configuration does not engage with the female opening / closing member 51 at the standby position in a state before plug-in insertion connection (valve closed position). Each retaining hard ball 29 in each holding hole 23 at the operating position is pressed and held by the pressing inner circumferential groove 65 of the cylindrical portion 62 while the pressing action by the third ridges 68 is given, and together. In the state of being always pressed in the retaining operation direction by the pressing inclined cam surface 66 and after the plug-in insertion connection (valve opening position), each of the retaining hard balls 29 is restrained and held by the restraining inner circumferential groove 67. .

That is, here, the connection sleeve 21
Each of the retaining hard balls 29 constitutes a retaining engagement means of the male joint member 70, and an operating means for operating the retaining engagement means by the female opening / closing member 51 and the external release member 61 is provided. Be composed. As a result, in the pipe joint body 10, before the plug-in connection, the opening / closing valve device 30 is closed by the female-type opening / closing member 51 holding each of the retaining hard balls 29 in the inoperative position. It is maintained in a valve state. Further, in the case after the plug-in connection, each retaining hard ball 29 is pulled with the release of the pressing of each retaining hard ball 29 due to the operation of the female type opening / closing member 51 and the opening operation of the opening / closing valve device 30. It will be extruded in the fastening operation direction.

Next, the male joint member 70 is attached to the cylindrical body 7.
1 to form a secondary-side internal flow path B which can communicate with the connection end side flow path A2 side of the primary-side internal flow path A, and as described above, the plug-in connection In operation, the opening / closing valve device 30, in this case, an insertion end (valve opening operating portion) 72 for pressing the annular valve opening operation end 45 of the opening / closing valve member 41, and the insertion outer peripheral surface 7 corresponding to the insertion end 72.
Three. Further, an outer working surface 74 that rises in a tapered shape from the inserted outer circumferential surface 73 so as to abut against the inner working surface 55 of the female opening / closing member 51, and a connecting end side outer circumferential surface 75 adjacent to the working outer surface 74. In this case, each of the retaining hard balls 29 in each of the retaining holes 23 pushed out in the retaining operation direction is received, and each of the retaining hard balls 29 is engaged with the on-off valve side upper peripheral surface 76a to retain and retain the same. The retaining outer peripheral groove 76 is formed, and at the insertion end side of the retaining outer peripheral groove 76, some extra space portion 76b is formed to receive each retaining hard ball 29 fully in the groove. .

Subsequently, the opening and closing operation and effects of the internal flow passage opening / closing type pipe joint device, particularly the opening / closing valve device 30, according to the first embodiment of each of the above configurations will be described.

In the device configuration according to the first embodiment,
The state before plug-in insertion of the male joint member 70 into the pipe joint body 10 (when not connected and in a valve-closed state) is as shown in FIGS. 1 and 2, and the plug of the male joint member 70 is plugged. The state after the in-insertion connection (at the time of connection and the valve is in the open state) is as shown in FIGS. 4 and 5. In addition, the state of the plug-out detachment operation preparation state (transition preparation state to non-connection state) in which the pipe joint body 10 and the male joint member 70 are relatively differentiated is as shown in FIGS. 6 and 7.

That is, in the closed state shown in FIGS. 1 and 2 when the valve is not connected, the opening / closing valve member 4 faces the valve seat surface 32 of the valve seat member 31 in the opening / closing valve device 30 in the pipe joint body 10.
The first valve seal member 43 is pressed into contact with the elastic force of the first ridge 48 to block the flow path between the free end flow path A1 and the connection end flow path A2 of the primary internal flow path A. In addition, the female opening / closing member 51 closes the inner opening of each holding hole 23 by the elastic force of the second ridge 57 by the sliding surface 53 at the standby position to hold each retaining hard ball 29 at the non-operation position, Further, the external release member 6
1 also holds the respective retaining hard balls 29 in the non-operation position in the standby position by the retaining inner circumferential groove 65, and retains the retaining hard balls 29 by the pressing force of the third ridge 68 by the pressing inclined cam surface 66. It is in a state of pushing in the direction.

When the male / female joint member 70 is plugged in and connected to the pipe joint body 10 in the closed state of the on-off valve device 30, first, the outer surface of the male joint member 70 is operated. 74 is the inner working surface 5 of the female opening / closing member 51
5, and the female opening / closing member 51 is
Is pushed in the connecting direction against the resilient pressure, and the insertion end 72 comes into contact with the annular valve opening operation end 45 of the opening / closing valve member 41 during the pushing operation. It starts to operate in the connection direction, in this case, the valve opening direction, against the resilient pressure of the one bar 48.

When the female opening / closing member 51 is pushed in, the insertion outer peripheral surface 73 comes into contact with the seal member 34, so that the pressurized fluid that starts flowing at the start of the valve opening operation is prevented from leaking to the outside. At the time when the holding of the retaining hard balls 29 by the sliding surface 53 of the female opening / closing member 51 is released, the retaining hard balls 29 are pressed by the pressing inclined cam surface 66 in a pressurized state, and the connection end side outer peripheral surface is pressed. 75.

At the end of the pushing operation of the female opening / closing member 51, each retaining hard ball 29 is pushed by the pressing inclined cam surface 66.
Is pressed into the retaining outer peripheral groove 76, so that each retaining hard ball 29 moves into the restraining inner peripheral groove 67 beyond the pressing inclined cam surface 66. In other words, in other words, after the external release member 61 is automatically activated until it hits the stopper ring 26 by the pressing of the third splines 68, each of the retaining hard balls 29 dropped into the retaining outer peripheral groove 76. Is pushed out by the slight return operation of the female opening / closing member 51 by the pressing of the second ridge 57, so that the female opening / closing member 51 is smoothly received in the restraining inner circumferential groove 67 and the upper portion of the retaining outer circumferential groove 76 on the opening / closing valve side. While the female opening / closing member 51 is held in the restrained state while being held in the engaged state with the peripheral surface 76a, the external release member 61 is simultaneously released from the stopper ring 26. It will be secured in the preparation position.

That is, as a result, as shown in FIGS. 4 and 5, the plug-in insertion connection of the male joint member 70 into the pipe joint main body 10 is performed, and the valve opening operation of the on-off valve device 30 is performed as expected. When the valve is opened and the valve opening state is maintained by the restraint of the female opening / closing member 51, the pipe joint body 1 is closed.
Thus, a flow can be made between the primary internal flow path A in the inner side and the secondary internal flow path B in the male joint member 70.

In the above-mentioned valve-open state, the external release member 61 is restrained at the corresponding position (valve-opening-corresponding position) by receiving each hard ball 29 into the restraining inner circumferential groove 67 and holding the restrained ball. As long as the restrained state is not released, not only manual operation operation (artificial operation operation) but also other operations, for example, unintentional inadvertent operation accompanying collision with another object, etc. It is held impossible to perform any operation. That is, in this restrained state, the external release member 61 cannot be operated for plug-out detachment, and the possibility of erroneous operation or the like is completely avoided.

Next, when the opening and closing valve device 30 is opened by restraining the female opening / closing member 51 inserted and connected to the plug-in, the male joint member 70 is opened from within the pipe joint body 10.
In order to remove the plug-out from the pipe joint body, the pipe joint body 10 and the male joint member 70 are relatively differentiated from each other, and the differential state is maintained. Both the joint member 70 and the joint member 70 are actuated again in the pushing direction and, consequently, in the valve opening direction against the resilient pressure of the first and second ridges 48 and 57 (the withdrawal operation in the valve closing direction is naturally impossible as described above). This causes a relative differential between the two members once, thereby releasing the restraint of the external release member 61 and keeping the restraint released (unless the restraint is maintained). (Returning to the original restrained state), the external release member 61 is released again, and thus the plug-out removal operation of the male joint member 70 as intended can be performed.

The release operation of the external release member 61 will be described in more detail. In the plug-in connection state (valve open state) shown in FIGS. 4 and 5, as shown in FIGS. Retaining outer peripheral groove 76 at member 70
Each of the retaining hard balls 29 engaged with the opening / closing valve side upper peripheral surface 76a and held in the constraining inner peripheral groove 67 of the external release member 61 is connected to the pipe joint body 10 and the male joint member 7.
With the relative differential with respect to 0 and maintaining the differential state,
First, the engagement with the open / close valve side upper peripheral surface 76a is released, and in the released state, the retaining outer peripheral groove 7
6 and 7 is placed in a floating state in which it can move toward the extra space portion 76b side, so that the plug-out is ready for disconnection (preparation for transition to non-connection) in FIGS. The operation of the external release member 61 which is abutted and held at the disengagement preparation position is enabled.

Then, subsequently, the differential state is maintained, that is, the restraint of the external release member 61 by the retaining hard balls 29 is released. In this case, FIG.
7, the external release member 61 is manually slid to the free end side against the elastic force of the third splines 68, whereby each of the retaining hard balls 29 in the retaining operation position is moved. In the form of being pushed into the retaining outer peripheral groove 76 including the extra space portion 76b, the outer releasing member 61 shifts from the corresponding side in the restricted inner peripheral groove 67 to the pressing inclined cam surface 66 side again in response to the sliding operation, As a result, the restraining restraint of the male joint member 70 is also released, and the male joint member 70 can be easily plugged out. After the plugout is released, the pipe joint main body 10 is again in FIG. The flow returns to the state shown in FIG.

Next, another example (modification) of the on-off valve structure in the first embodiment will be described.

FIG. 8 is a partially cut-away side view showing a schematic configuration of a pipe joint body before plug-in connection (valve closed state) of an open / close valve structure according to another example of the internal flow path open / close type pipe joint apparatus of the first embodiment. 9 is an enlarged partial cross-sectional view showing the configuration of the retaining mechanism in the valve-opened state of FIG. 8, and FIG. 10 is a front view of the on-off valve member of FIG. 9 as viewed from the connection end side. FIG.

8 to 10, the on-off valve structure according to the modification of the first embodiment is such that the male joint member 70 is inserted into the annular valve-opening end 45 of the on-off valve member 41. A buffer member 49 for receiving and abutting the end (valve-opening operating portion) 72 in a buffer-like manner is provided so as to be detachable, and the other configuration is exactly the same as in the case of FIGS. 1 to 7 described above. is there.

In the case of the on-off valve structure according to the modification of the first embodiment, the buffer member 49 provided around the annular valve-opening operation end 45 of the on-off valve member 41 is used to open the valve by the male joint member 70. Since the abutting contact of the insertion end 72 during operation can be buffered, the impact caused by the abutting contact can be effectively reduced, and as a result, the valve opening operation can be performed smoothly. Thus, the impact resistance of the annular valve opening end 45 can be improved, and the durability of the on-off valve member 41 itself can be significantly increased.
At the same time, the buffer member 49 can be replaced by abrasion or the like.

Here, in the structure of the internal flow passage opening / closing type pipe joint device according to the first embodiment described above and the modification of the first embodiment, the opening / closing valve device provided in the pipe joint main body 10. 30, when there is concern about leakage of pressurized fluid when the valve is open due to wear, abrasion, or the like in each part of the on-off valve member 41, the pipe joint is used to replace the on-off valve member 41. Connection sleeve 21 constituting the base of main body 10
The opening / closing valve structure is exposed to the outside by only one simple operation of unscrewing and removing the cylindrical base member 11 from, and the target opening / closing valve member 41 is taken out in the exposed state to easily connect with a new opening / closing valve member. After the replacement, the cylindrical body 11 may be screwed and connected to the connection sleeve 21 again. At this time, the connection sleeve 21
For removing the cylindrical base 11 from the screw and removing the cylindrical base 11 to the connecting sleeve 21 again, for example, by utilizing the respective hexagonal heads formed on the respective outer peripheral surfaces. One can be fixed by using a tool such as a monkey wrench or a hexagon wrench, and the other can be easily screwed or screwed and turned.

In other words, the connection sleeve 21 and the cylindrical base 11 can be unscrewed and removed and screwed again without any relation to the other components of the device. And the replacement of the corresponding portion of the on-off valve member 41, for example, the valve seal member 43, the buffer member 49, and the first spring 48 if necessary, etc., can be performed very easily and easily. As described above, there is no need to consider the relationship with other components at all, so that adjustment or the like at the time of replacement is not required, and effective and accurate replacement can be quickly performed.

Next, a second embodiment of the present invention will be described.

FIG. 11 shows a schematic structure of a pipe joint body before plug-in insertion connection (valve closed state) of the open / close valve structure of the internal flow path open / close type pipe joint apparatus to which the second embodiment is applied. (A) is a half-cut side view of the same pipe joint body, (b) is a half-cut plan view of the same, and FIG. 12 is FIG. 11 (a).
FIG. 13 is an enlarged cross-sectional explanatory view showing the configuration of the retaining mechanism in the valve-opened state, and FIG. 13 is a front view of the on-off valve member shown in FIG.

In the apparatus configuration shown in FIGS. 11 to 13, the on-off valve structure according to the second embodiment is different from the on-off valve member 41 according to the first embodiment in that a corresponding on-off valve member 41a is configured as follows. I do.

That is, the opening / closing valve member 41a is located at the connection end side of the valve body portion 42a, and is opposed to the valve seat member 31 so as to be capable of opening / closing / opening / closing operation, and similarly abuts on the valve seat surface 32. A valve seal member 43a is provided around the valve body portion 42a.
Of the male joint member 70 which is operated by the insertion end (valve-opening operation part) 72 of the male joint member 70,
A passive protruding flat plate portion 44a having a plate-shaped valve-opening operation end 45a protruding in a flat plate shape is formed.
Similarly, the receiving concave portion 47a is formed in an annular shape, and the other components are exactly the same as those in the first embodiment.

Therefore, in the case of the on-off valve member 41a according to the second embodiment, the pressurized fluid flows along both sides of the passively projecting flat plate portion 44a when the on-off valve device 30 is open. In the second embodiment, the same or substantially the same operation and effect as those in the first embodiment can be obtained.

Next, another example (modification) of the on-off valve structure in the second embodiment will be described.

FIG. 14 shows a schematic structure of a pipe joint body before plug-in connection (valve closed state) of an open / close valve structure according to another example of the internal flow path open / close type pipe joint apparatus of the second embodiment. 15A is a half-cut side view of the pipe joint body, FIG. 15B is a half-cut plan view thereof, and FIG.
FIG. 16 is an enlarged cross-sectional explanatory view showing the configuration of the retaining and locking mechanism in the valve open state, and FIG. 16 is a front view of the opening / closing valve member of FIG.

In the device configuration shown in FIGS.
The opening / closing valve structure according to the modification of the second embodiment is configured such that the insertion end (valve opening operating portion) 72 of the male joint member 70 at the plate-like valve opening operation end 45a of the opening / closing valve member 41a is buffered. Both ends for stopping and abutting, that is, substantially the insertion end 7
In the end portion of the passive protruding flat plate portion 44a corresponding to an intermediate portion excluding both end portions of No. 2, a cutout portion 46a for allowing the flow of the pressurized fluid at the time of the valve opening operation is formed. The other configurations are exactly the same as those in FIGS. 11 to 13.

In the case of the on-off valve structure according to the modification of the second embodiment, the cut-out portion 46a is formed at the edge of the passive protruding flat plate portion 44a when the on-off valve device 30 is open. The flow of the pressurized fluid along both sides of the passive protruding flat plate portion 44a becomes smooth, and in the modification of the second embodiment, the same or substantially the same as in the second embodiment, and thus the first embodiment. A similar effect can be obtained.

[0072]

As described above in detail in each embodiment, according to the opening / closing valve structure of the internal flow passage opening / closing type pipe joint device of the present invention, the plug-in insertion connection operation of the male joint member to the pipe joint body. With the opening of the on-off valve member,
The male coupling member is retained at the position corresponding to the valve-opening operation by the retaining engagement means, and the opening / closing valve member is returned to the valve-closing position with the release operation of the retaining constraint, thereby returning the male type member. An internal flow passage opening / closing type pipe joint device which enables a plug-out detachment operation of a joint member, wherein a connection sleeve and a cylindrical base body each having an internal flow passage are provided, and the inside is provided with a valve seat member therebetween. The connection sleeve and the cylindrical base are screwed together to form a pipe joint body, and the valve seat member is combined with an on-off valve member to form an on-off valve structure. When replacing the on-off valve member, the on-off valve structure can be easily exposed by a simple operation of simply unscrewing the connection sleeve and the cylindrical base member. Remove the target on-off valve member and open / close a new one After replacing the member can be returned to the available state a cylindrical base body to the connection sleeve attached again screwing. Therefore, if a required number of on-off valve members are prepared, disadvantages such as leakage of pressurized air to be handled due to wear, abrasion and the like can be easily dealt with. The mutual unscrewing and unscrewing and re-screwing can be performed completely independently of the other components of the device, and does not require any adjustment or the like related to other components for each exchange. It has practically excellent features such as effective and accurate replacement and exchange can be quickly performed.

[Brief description of the drawings]

FIG. 1 shows a schematic configuration of an internal flow passage opening / closing type pipe joint device to which a first embodiment of the present invention is applied before plug-in insertion connection (valve closed state), and FIG. (B) is a half sectional side view of the male joint member.

FIG. 2 is an enlarged partial cross-sectional view illustrating a configuration of a retaining mechanism in a closed state of FIG. 1A.

FIG. 3 is a front view of the on-off valve member shown in FIG.

FIG. 4 is a half cutaway side view showing a state after the plug-in insertion connection between the pipe joint body and the male joint member (valve open state).

FIG. 5 is an enlarged cross-sectional explanatory view showing the configuration of the retaining mechanism in the valve-open state of FIG. 4;

FIG. 6 is a half cutaway side view showing a state in which the pipe joint main body and the male joint member are in a plug-out detachment (non-connection) preparation state.

FIG. 7 is an enlarged sectional explanatory view showing a configuration of a retaining and locking mechanism in a non-connection preparation state of FIG. 6;

FIG. 8 is a half cutaway side view showing a schematic configuration of a pipe joint body before plug-in insertion connection (valve closed state) of an open / close valve structure according to another example of the internal flow path open / close type pipe joint apparatus of the first embodiment. is there.

FIG. 9 is an enlarged partial cross-sectional view showing the configuration of the retaining mechanism in the valve-opened state of FIG. 8;

FIG. 10 is a front view of the on-off valve member of FIG. 9 as viewed from the connection end side.

FIG. 11 shows a schematic configuration of a pipe joint main body before plug-in insertion connection (in a valve closed state) of an internal flow passage opening / closing pipe joint device to which a second embodiment of the present invention is applied, and FIG.
FIG. 2 is a half-cut side view of the pipe joint body, and FIG.

FIG. 12 is an enlarged sectional explanatory view showing the configuration of the retaining mechanism in the valve open state of FIG. 11 (a).

FIG. 13 is a front view of the on-off valve member of FIG. 11A as viewed from the connection end side.

FIG. 14 shows a schematic configuration of a pipe joint body before plug-in insertion connection (valve closed state) of an open / close valve structure according to another example of the internal flow path open / close type pipe joint apparatus of the second embodiment. Figure (a) is a half-cut side view of the pipe joint body, and Figure (b)
Is a plan view of the same half.

FIG. 15 is an enlarged cross-sectional explanatory view showing the configuration of the locking mechanism in the valve-opened state of FIG. 14 (a).

FIG. 16 is a front view of the on-off valve member shown in FIG.

FIG. 17 is a half-cut side view showing a schematic configuration of a pipe joint body before plug-in connection in a conventional pipe joint device with an on-off valve device.

FIG. 18 is a half-cut side view showing an aspect after plug-in connection of the male joint member to the pipe joint main body.

[Explanation of symbols]

 A Primary side internal flow path A1 Free end side flow path of primary side internal flow path A2 Connection end side flow path of primary side internal flow path B Secondary side internal flow path 10 Fitting body 11 Cylindrical base 12 First Step 21 Connection sleeve 21a Seal ring 22 Tubular part 23 Holding hole 24 Second step 25 Outer sliding surface 26 Stopper ring 27 Butt step 28 Inner sliding surface 29 Retaining hard ball 30 Opening / closing valve device 31 Valve seat member 31a Seal ring 32 Valve seat surface 33 Inner peripheral surface 34 Seal member 35 Third step portion 41, 41a Open / close valve member 42, 42a Valve body portion 43, 43a Valve seal member 44 Cylindrical portion 44a Flat plate portion 45 Annular valve opening operation End 45a Plate-shaped valve opening operation end 46 Flow opening 46a Cutout 47, 47a Receiving recess 48 First spring 49 Buffer member 51 Female opening / closing member 52 Tubular part 53 Sliding surface 54 Fourth step 55 Surface 56 abutting end surface 57 second spring 61 external release member 62 cylindrical portion 63 inner peripheral operation surface 64 fifth step portion 65 pressing inner circumferential groove 66 pressing inner surface 67 restraining inner circumferential groove 68 third spring 70 male coupling member 71 Cylindrical part 72 Inserting and pushing operation end (insertion end) 73 Inserting outer peripheral surface 74 Working outer surface 75 Connecting end side outer peripheral surface 76 Retaining outer peripheral groove 76a Opening valve side upper inner surface 76b Extra space

Continued on the front page (72) Inventor Shuzaburo Ishii 3-10-2 Minamiyukiya, Ota-ku, Tokyo (72) Inventor Hidetoshi Ishii 3-10-2, Minamiyukiya, Ota-ku, Tokyo F-term (reference) 3J106 AB01 BA01 BB01 BC04 BC12 BD01 BE33 CA19 EA03 EB07 EC02 EC07 ED32 EE13 GA01 GA04 GA13 GA14 GA23 GB01

Claims (4)

[Claims] 1. A connection sleeve having a common primary-side internal flow path formed therein, and a cylindrical body on a supply side, wherein a retaining engagement means is provided at a connection opening of the connection sleeve, and the retaining engagement means is provided. Is disposed, and the cylindrical base is detachably connected to the connection sleeve via a valve seat member. The valve seat member is always resiliently occupied in the closed position. A pipe joint body having an open / close valve member for shutting off / opening / closing the secondary internal flow path, and a secondary internal flow path formed to flow through the primary internal flow path; and The connection sleeve has a tubular portion for performing plug-in insertion connection operation and plug-out removal operation, and the tubular body portion has an operation operating portion for operating the operating means and the opening / closing valve member. At least a male joint member provided with a valve opening With the plug-in insertion connection operation of the male joint member, the opening / closing valve member is opened, and the male joint member is restrained by the retaining engagement means at a position corresponding to the valve opening operation. Further, the opening / closing valve structure of the internal flow passage opening / closing type pipe joint device for allowing the plug-out to be released by returning the opening / closing valve member to the valve closing position in accordance with the release operation of the retaining constraint, A valve member in which a valve member is provided around a valve seal member pressurized against the valve seat surface of the valve seat member; and a valve opening operating portion of the male joint member on a connection end side of the valve member portion. And a passively projecting tubular body part which forms a tubular valve-opening operating end projecting in a cylindrical shape which is abutted and pressed, and which has a flow opening having a required opening area in the tubular part. During operation,
An on-off valve structure for an internal passage opening / closing pipe joint device, characterized in that a pressurized fluid can be introduced through the flow opening. 2. An annular valve opening operation end of the on-off valve member,
The opening and closing of the internal flow passage opening / closing type pipe joint device according to claim 1, wherein a buffer member for receiving and abutting the valve opening operation portion of the male joint member in a buffered manner is detachably provided. Valve structure. 3. A connecting sleeve in which a common primary-side internal flow path is formed, and a cylindrical body on the supply side, wherein a retaining engagement means is provided at a connection opening of the connecting sleeve, and the retaining engagement means is provided. Is disposed, and the cylindrical body is detachably connected to the connection sleeve via a valve seat member. The valve seat member is always resiliently occupied in the closed position. A pipe joint body having an opening / closing valve member for shutting off the secondary internal flow path facing the opening / closing operation, and a secondary internal flow path passing through the primary internal flow path; and The connecting sleeve has a tubular body for plug-in insertion connection operation and plug-out detachment operation. The tubular body part has an operation operating part for operating the operating means, and the opening / closing valve member is operated to open. At least a male joint member provided with a valve opening With the plug-in insertion connection operation of the male joint member, the opening / closing valve member is opened, and the male joint member is restrained by the retaining engagement means at a position corresponding to the valve opening operation. Further, the opening / closing valve structure of the internal flow passage opening / closing type pipe joint device for allowing the plug-out to be released by returning the opening / closing valve member to the valve closing position in accordance with the release operation of the retaining constraint, A valve member in which a valve member is provided around a valve seal member pressurized against the valve seat surface of the valve seat member; and a valve opening operating portion of the male joint member on a connection end side of the valve member portion. And a passive protruding flat plate portion having a plate-shaped valve-opening end that protrudes into a flat shape and is pressed by the pressure from both sides of the passive protruding flat plate portion when the valve is opened. Internal flow passage opening / closing pipe joint characterized by being capable of introducing a fluid The opening and closing valve structure of the location. 4. A plate-like valve opening operation end of the on-off valve member,
A cut-out portion is formed in an intermediate portion of the male joint member except for both ends for bringing the valve-opening operation portion into contact with the male-type joint member, and allows a pressurized fluid to flow during the valve-opening operation. The open / close valve structure of the internal flow passage open / close type pipe joint device according to claim 3.