JP2008032202A - Gas supply connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas supply connector, wherein a socket having a cylindrical front end to which a gas flow-in port opens and a base which is connected in communication with a gas supply destination and a plug B having a cylindrical front end 5 to which a gas flow-out port 4 opens and a base 6 which is connected in communication with a gas supply source are formed connectable in communication with each other with the socket front end externally fitted to the plug front end, a gas flow-out port opening/closing valve element 8 is mounted inside the plug reciprocatingly in the axial direction of a cylinder and an elastic energizing means 10 is mounted there for moving a valve element to a gas flow-out port side closing position, and a thrust member is provided in the socket for operating the valve element to be thrust and moved from the closed position to an opened position against energizing force with the socket front end externally fitted to the plug front end, thereby effectively preventing gas blowout from the gas flow-out port due to malpractice during a time excluding a gas using time. <P>SOLUTION: A warning means 14 for warning the thrusting movement of the valve element from the closed position to the opened position against energizing force is provided over between the valve element and the plug in such a manner as to cancel the warning with specified operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a socket having a cylindrical socket front end portion in which a gas inlet port is opened, a socket base portion capable of connecting the gas inlet port to a gas supply destination, and a cylindrical plug tip portion in which a gas outlet port is opened. And a plug provided with a plug base portion that can connect the gas outlet to a gas supply source, and externally fitting the socket tip portion to the plug tip portion to supply the gas supply destination to the gas supply Originally configured to be able to communicate and connect, a valve body that can open and close the gas outlet is mounted inside the plug so as to be able to reciprocate in the cylinder axis direction, and the valve body is closed on the gas outlet side. The urging means capable of elastically urging so as to move to the position is mounted, and the valve body moving to the closed position as the socket tip end is fitted to the plug tip end is Push to the open position against the biasing force of the biasing means The mobile operable pressing member, a gas supply connector which is provided on the socket.

The gas supply connector closes with the urging force of the urging means as the cylindrical socket front end opening the gas inlet opens to the cylindrical plug front end opening the gas outlet. The valve body that has moved to the position is operated to be pressed and moved to the open position against the urging force of the urging means by the pressing member provided in the socket. If the socket base is connected to the gas supply destination with a gas hose or the like in advance, there is an advantage that the gas supply destination can be connected to the gas supply source by a so-called one-touch operation in which the socket tip is fitted to the plug tip. There is a valve body that is moved to the closed position due to mischief or misoperation other than when using the gas that externally fits the socket tip to the plug tip. From the gas outlet Once pressed and moved to the open position against the urging force of the means, there is a possibility that gas is ejected from the gas outlet.
For this reason, a cap for closing the gas outlet has been detachably attached to the plug tip so that the valve element that has been moved to the closed position is not pushed to the open position by mischief or misoperation. (It is a well-known and commonly used technique and information on prior art documents cannot be disclosed).

Japanese Patent Laid-Open No. 2-85578

However, if the cap is only detachably attached to the tip of the plug, if the cap is removed by hand, the valve body can be easily pushed and moved from the gas outlet to the open position using a fingertip or a stick. However, there is a drawback that gas cannot be effectively prevented from being ejected from the gas outlet due to mischief.
The present invention has been made in view of the above circumstances, and an object thereof is to effectively prevent gas ejection from a gas outlet due to mischief except when gas is used.

  A first characteristic configuration of the present invention is a socket having a cylindrical socket front end portion in which a gas inflow opening is opened, a socket base portion capable of connecting the gas inflow port to a gas supply destination, and a gas outflow opening. A plug having a cylindrical plug tip portion and a plug base portion capable of communicating and connecting the gas outlet to a gas supply source; and fitting the socket tip portion to the plug tip portion to supply the gas The tip is configured to be able to communicate with the gas supply source, and a valve body capable of opening and closing the gas outlet is mounted inside the plug so as to reciprocate in the direction of the cylinder axis. A biasing means that is elastically biased so as to move to the closed position on the outlet side is mounted, and the socket tip is moved to the closed position as the socket tip is fitted to the plug tip. The valve body is resisted against the urging force of the urging means. An opening position that resists the biasing force of the biasing means of the valve body that is a connecting member for gas supply provided in the socket, and that is provided with a pressing member capable of being pressed and moved at the opening position. In the point which is provided over the said valve body and the said plug, the control means which can check the pushing movement to the side can be cancelled | released by specific operation.

[Action and effect]
The check means that can check the pressing movement to the open position side against the urging force of the urging means of the valve body that is moving to the closed position is able to release the check by a specific operation. In the state where the pressing movement to the opening position side against the urging force of the urging means of the valve body is restrained by the restraining means, it is in the closed position until a specific operation is applied and the restraint is released. It is difficult to move the moving valve body to the open position against the urging force of the urging means by simply pressing the valve body from the gas outlet opening at the tip of the plug. Thus, it is possible to effectively prevent gas from being ejected from the gas outlet due to mischief.

  According to a second characteristic configuration of the present invention, an engaging portion capable of engaging the valve body moving to the closed position in the plug base side direction with respect to the plug side is provided around the cylindrical axis of the valve body. The urging force of the urging means of the valve body is provided in a state in which the valve body is engaged in the plug base side direction with respect to the plug. It is configured to be able to restrain the pressing movement toward the opening position to resist, and to be able to release the restraint by a specific operation of releasing the engagement with the plug tip by rotating the valve body around the cylinder axis. It is in a certain point.

[Action and effect]
An engagement portion capable of engaging the valve body moving to the closed position in the plug base side direction with respect to the plug side is provided so as to be freely disengaged by a rotation operation around the cylindrical axis of the valve body, The check means is configured to be able to check the pressing movement toward the open position against the urging force of the urging means of the valve body while the valve body is engaged with the plug in the plug base side direction. Therefore, when the valve body is moved to the closed position, the valve body is rotated around the axis of the cylinder and engaged with the plug in the plug base side direction. By restricting the movement to the side, it is possible to reliably restrain the pressing movement to the open position side against the urging force of the urging means of the valve body.
Further, since the restraining means is configured to be able to release restraint by a specific operation of rotating the valve body around the cylinder axis and releasing the engagement with the plug, it resists the biasing force of the biasing means of the valve body. In a state where the pushing movement toward the open position is restrained, gas is blown out from the gas outlet by mischief until a specific operation is performed to release the engagement with the plug by rotating the valve body around the cylinder axis. Can be effectively prevented.

  According to a third characteristic configuration of the present invention, the valve body has a cylindrical axis direction in which an annular hermetic seal material is interposed over the entire circumference between the outer peripheral surface of the valve body and the inner peripheral surface of the plug. The valve body and the plug can be screwed together by rotating around the cylinder axis of the valve body moving to the closed position. A state in which a threaded portion is provided across the outer peripheral surface of the valve body and the inner peripheral surface of the plug, and the valve body moving the restraining means to the closed position is threadedly engaged with the plug The valve body is configured to be able to restrain the pressing movement of the valve body toward the open position against the urging force of the urging means, and the valve body is rotated around the cylinder axis to be screwed into the plug. It is in the point that it is configured to be able to release the restraint by a specific operation for releasing the match.

[Action and effect]
The valve body is moved to a closed position within a certain length range in the direction of the cylinder axis where an annular hermetic seal material is interposed over the entire circumference between the outer peripheral surface of the valve body and the inner peripheral surface of the plug. And a threaded portion that allows the valve body and the plug to be screwed together by a rotation operation around the cylinder axis of the valve body that is moved to the closed position. An opening position that is provided over the inner peripheral surface of the plug and resists the urging force of the urging means of the valve body in a state where the valve body that is moving to the closed position is screwed into the plug. It is configured to be able to restrain the pressure movement to the side, so that the valve element can be rotated around the cylinder axis while the valve element is moving to the closed position within a certain length range in the cylinder axis direction. Then, the valve body and the plug are screwed together, thereby restricting the movement of the valve body toward the open position and resisting the urging force of the urging means of the valve body. A pressing movement in the opening position side can be check surely that.
In addition, since the valve body is configured to be able to release the restraint by a specific operation of rotating the valve body around the cylinder axis to release the threaded engagement with the plug, the valve body is moved to the open position side that resists the urging force of the urging means of the valve body. In the state where the movement of the pressure is restrained, the gas is effectively ejected from the gas outlet by mischief until a specific operation is performed to release the screwing to the plug by rotating the valve body around the cylinder axis. Can be prevented.

  According to a fourth characteristic configuration of the present invention, a cap capable of sealing the gas outlet is detachably attached to the plug, and the cap is detached from the plug when the cap is attached to the plug. Along with this, the cap and the valve body are mechanically linked so that the check means switches to a state in which the pressing movement of the valve body toward the open position against the urging force of the urging means is checked. This is in that a linkage mechanism is provided.

[Action and effect]
Since the cap that can seal the gas outlet is detachably attached to the plug, when the gas is not used with the socket removed from the plug, the cap can be closed by attaching the cap to the plug and sealing the gas outlet. The operation of pressing and moving the valve body to the open position even when the check means is not switched to the state of checking the pressing movement to the open position side against the biasing force of the biasing means of the valve body moving to the position Therefore, it is possible to prevent gas from being ejected from the gas outlet due to mischief.
However, if the restraining means has not been switched to a state that restrains the pressing movement of the valve body that is moving to the closed position to the open position side, if the cap is removed from the plug, the valve body is moved to the open position. There is a drawback that the operation of pressing and moving can be performed, and the ejection of gas from the gas outlet due to mischief cannot be effectively prevented.
Therefore, paying attention to this drawback, the pressing movement of the valve body toward the open position against the urging force of the urging means of the valve body is restrained as the cap is detached from the plug from the attached state of the cap to the plug. Since a linkage mechanism that mechanically links the cap and the valve body is provided so that the restraining means switches to the state where the valve body moves, the pressing movement of the valve body moving to the closed position to the open position side is restrained. Even when the cap is attached to the plug without the check means being switched to the state, the valve body is pressed toward the open position against the urging force of the urging means of the valve body as the cap is detached from the plug. The restraining means is switched to a state where the movement is restrained.
Therefore, even if the cap attached without the check means being switched to the state of checking the pressing movement of the valve body moving to the closed position to the open position side is removed from the plug, a specific operation is added. Until the restraint by the restraining means is released, it is difficult to move the valve body to the open position side against the biasing force of the biasing means, simply by pressing the valve body from the gas outlet opening at the tip of the plug. Except when using gas, it is possible to effectively prevent gas from being ejected from the gas outlet due to mischief.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 to 3 show a city gas supply connector such as a gas outlet according to the present invention. A cylindrical socket front end portion 2 where a gas inlet 1 is opened and a gas inlet 1 are connected to a gas supply destination such as a gas consuming appliance. A socket A provided with a socket base 3 which can be connected to each other by a gas hose (not shown), a cylindrical plug tip 5 where the gas outlet 4 opens, and a gas outlet 4 are provided inside the wall. A plug B provided with a plug base 6 that can be connected to a gas supply source via a gas conduit by a fixed pipe (not shown) or the like is provided. As shown in FIG. Is connected to the plug tip 5 to connect the socket A and the plug B so that the gas supply destination can be connected to the gas supply source.

  A valve seat 7 is formed on the gas outlet side inner peripheral surface of the plug B, and a valve body 8 capable of opening and closing the gas outlet 4 is mounted on the inner side of the plug B so as to reciprocate in the cylinder axis X direction. A compression coil spring 10 is mounted between the valve body 8 and the spring retaining C ring 9 so that the valve body 8 contacts the valve seat 7 via an airtight seal elastic O-ring 11 as shown in FIG. The biasing means is configured to be elastically biased so as to move to the corresponding closed position.

  In addition, the pressed shaft member 12 that protrudes near the gas outlet 4 while the valve body 8 is moved to the closed position is integrated with the cylindrical axis X on the gas outlet side of the valve body 8 so as to be integrated. A pressing shaft member 13 capable of pressing the pressed shaft member 12 is provided on the inner side of the socket A so as to be concentric with the cylindrical shaft core X, and the socket tip 2 is plugged as shown in FIGS. The valve body 8 that has moved to the closed position that contacts the valve seat 7 as it is externally fitted to the distal end portion 5 can be operated to be pressed and moved to the open position against the urging force of the compression coil spring 10. It is.

  And the check means 14 which can check the pressing movement to the open position side which resists the urging | biasing force of the compression coil spring 10 of the valve body 8 which has moved to the closed position which contacts the valve seat 7 is the check means 14 Is provided across the valve body 8 and the plug B so that the check can be released by a specific operation.

  The check means 14 includes an engaging portion 15 that can engage the valve body 8 that has been moved to the closed position with respect to the plug distal end portion 5 in the plug base side direction, and a cylindrical axis X of the valve body 8. As shown in FIG. 1, the valve body 8 is engaged with the plug distal end portion 5 toward the plug base side as shown in FIG. 2 is configured so that the pressing movement toward the open position against the urging force of the compression coil spring 10 can be restrained, and the plug 8 is rotated around the cylinder axis X as shown in FIG. The restraint can be released by a specific operation for releasing the engagement with the tip 5.

  The engaging portion 15 integrally forms a pair of tongue pieces 16 on the outer peripheral side of the valve body 8 at a position facing the valve body radial direction, and faces the inner peripheral side of the plug B in the plug radial direction. A pair of concave grooves 17 that are long in the direction of the cylindrical axis X and an arc-shaped peripheral groove into which the tongue piece 16 enters the gas outlet side end of the concave groove 17 as the valve body 8 is rotated. 18 is formed.

  Then, a rotary operation tool 20 such as a hexagon wrench is fitted into a rotation operation locking hole 19 such as a hexagon hole formed on the end surface of the pressed shaft member 12, and the valve body 8 in the closed position is rotated. Engagement for engaging the valve body 8 with respect to the plug B toward the plug base side by turning the tongue piece 16 into the circumferential groove 18 by rotating the operation tool 20 in one direction around the cylinder axis. By operation, as shown in FIG. 1, the valve body 8 can be switched to a restrained state in which the pressing movement of the valve body 8 toward the open position against the urging force of the compression coil spring 10 is restrained. The engagement of the valve body 8 with respect to the plug tip 5 is released by causing the tongue 16 that has been rotated in the other direction by the turning operation tool 20 to enter the circumferential groove 18 to face the end of the groove 17. With a specific operation, the tongue piece 16 is moved along the concave groove 17 in the direction of the cylinder axis X as shown in FIG. , And are configured to be able to switch to restrain release state to allow the pressing movement in the opening position side against the urging force of the compression coil spring 10 of the valve body 8.

  Although not shown, in the present embodiment, the valve body 8 is made up of, for example, a pressed shaft member 12 on the gas outlet side in which a rotation operation locking hole 19 is formed, and the pressed shaft member 12. Also, the valve body 8 is divided into a plurality of valve body constituent members in the direction of the cylindrical axis X by separately forming the parts on the compression coil spring 10 side, and these valve body constituent members are concentric. The valve body 8 is configured by being integrally screwed together or concentrically integrated to form a valve body component member and a plug B on the gas outlet side of the valve body component members. The check means 14 that can check the pressing movement toward the open position against the urging force of the urging means (compression coil spring) 10 of the valve body 8 that has moved to the closed position is released by the specific operation. It may be provided as possible.

[Second Embodiment]
4 to 10 show another embodiment of the connector for supplying city gas according to the present invention, in which the gas plug outlet 4 and the gas outlet 4 can be connected to the gas supply source. A plug B is configured by fixing and fixing the plug base 6 integrally and concentrically with an elastic O-ring 40 for hermetic sealing.

  Inside the plug B, a valve body 8 capable of opening and closing the gas outlet 4 is mounted so as to reciprocate in the direction of the cylinder axis X, and the valve body 8 moves to a closed position on the gas outlet 4 side. The urging means 10 that can be urged elastically is mounted, and the valve body 8 that is moving to the closed position is pushed toward the open position against the urging force of the urging means 10. The check means 14 that can check the pressure is provided across the valve body 8 and the plug B so that the check can be released by a specific operation.

  The valve body 8 has a valve body 8a in which the inner peripheral surface of the plug through hole 41 forming the gas outlet 4 is a valve seat 7 and the tip side can be inserted into and removed from the plug through hole 41, and the valve body 8a. And a flange 8b integrally provided on the base end side of the valve body, and the valve body penetrating radially through the valve main body 8a on the back side of the gas flow hole 43 opened in the base end side end face 42 of the valve main body 8a. The gas that is connected to the through hole 44 and flows into the gas flow hole 43 from the plug base 6 side is between the valve body through hole 44, the outer peripheral surface of the valve body 8, and the inner peripheral surface of the plug tip 5. The gas outlet 4 is configured to flow out through the space 45.

  An elastic O-ring 11 for hermetic sealing is attached to the distal end side of the valve body 8a, and a compression coil spring 10 is attached between the flange 8b and the inner bottom surface of the plug base 6, so that the elastic O-ring 11 is plugged. An urging means capable of elastically urging the valve body 8 so as to move to the closed position where the gas outlet 4 is closed by sliding in close contact with the inner peripheral surface of the through hole 41, A stopper ring 46 that restricts the range of movement of the body 8 toward the closed position by contact with the flange portion 8 b is fixed in a state of being sandwiched between the plug base portion 6 and the plug tip portion 5.

  Therefore, when the socket tip 2 is not fitted on the plug tip 5, as shown in FIG. 6, the valve body 8 is moved to the closed position by the urging force of the compression coil spring 10, and the socket tip When the socket 2 is externally fitted to the plug tip 5 and the socket A and the plug B are connected, the pressing shaft member 13 of the socket A presses the valve element 8 against the urging force of the compression coil spring 10. As shown in FIG. 7, the valve body 8 is moved to the open position, and the gas supply destination can be connected to the gas supply source.

  The restraining means 14 includes an engaging portion 15 that can engage the valve body 8 moving to the closed position toward the plug base side in the plug base side direction, around the cylinder axis X of the valve body 8. The compression coil of the valve body 8 in a state where the valve body 8 is engaged with the plug B side toward the plug base side as shown in FIG. A configuration in which the pressing movement toward the open position against the urging force of the spring 10 can be restrained, and the valve body 8 is rotated around the cylinder axis X to release the engagement with the plug B side. As shown in FIGS. 6 and 7, the operation can be switched to the check release state.

As shown in FIG. 5, the engaging portion 15 is formed integrally with a stopper ring 46 fixed on the plug B side and a tongue piece 16 protruding toward the inner peripheral side thereof, and from the flange portion 8b of the valve body 8a. In addition, the concave groove 17 into which the tongue piece 16 is relatively movable along the cylindrical axis X direction and the valve body 8 moving to the closed position are rotated on the outer peripheral side on the distal end side. An arcuate circumferential groove 18 into which the tongue piece 16 located on the 17 side enters is formed.
The circumferential groove 18 is formed in an arc shape extending over an angle range θ of about 90 degrees around the cylinder axis X.

  Then, a + -shaped rotation operation fitting groove 47 is formed on the distal end surface of the valve body 8, and the valve body 8 in the closed position is rotated by the rotary operation tool 20 such as a screwdriver fitted into the fitting groove 47. Is rotated in one direction around the cylinder axis X (counterclockwise in this embodiment), and the tongue 16 is inserted into the circumferential groove 18 as shown in FIG. As shown in FIG. 4, the engaging operation for engaging B with the plug base side direction restrains the pressing movement of the valve body 8 toward the open position against the urging force of the compression coil spring 10. It can be switched to the check state.

  Further, by rotating the valve body 8 in the other direction (clockwise in this embodiment) with the rotation operation tool 20, the tongue piece 16 that has entered the circumferential groove 18 faces the end of the concave groove 17. In the specific operation of releasing the engagement of the valve body 8 with respect to the plug B side, the tongue piece 16 enters the concave groove 17 as shown in FIGS. It is configured to be able to switch to a check release state that allows pressing movement toward the open position against the urging force of the coil spring 10.

  FIGS. 8 to 10 show a cap C that is detachably attached to the plug B from which the socket A is removed, and a female screw portion 49 that is screwed into a male screw portion 48 formed on the outer peripheral surface of the plug base 6. And an elastic O-ring 50 for hermetic sealing to be brought into close contact with the end face of the plug base 6, and the cap C is rotated clockwise and the female screw portion 49 is screwed into the male screw portion 48 to be attached to the plug B. As shown in FIG. 9, the gas outlet 4 is configured to be sealed.

  Then, from the state in which the cap C is attached to the plug B shown in FIG. 9, the valve body 8 moves toward the open position against the urging force of the compression coil spring 10 as the cap C is detached from the plug B. A linkage mechanism 51 that mechanically links the cap C and the valve body 8 is provided so that the check means 14 is switched to a check state that checks the pressing movement.

  The linkage mechanism 51 has a fitting shaft member 53 provided with a + -shaped fitting tip 52 that can be fitted in the turning operation fitting groove 47 of the valve body 8 concentrically inside the cap C. It is configured to project integrally.

Therefore, as shown in FIG. 9, as the cap C is rotated clockwise (in the positive direction) and attached to the plug B in which the restraining means 14 is not switched to the restrained state as shown in FIG. When the fitting tip 52 is fitted into the turning operation fitting groove 47 and the cap C in the mounted state is rotated counterclockwise (reverse direction) to be detached from the plug B, the compression coil spring 10 The valve element 8 in which the turning operation fitting groove 47 is fitted to the fitting tip 52 is rotated counterclockwise by the urging force, and the tongue piece 16 is formed in the circumferential groove 18 as shown in FIG. Entering, the check means 14 is switched to the check state.

When the cap C is attached to the plug B in which the check means 14 is switched to the check state, the fitting tip 52 is fitted into the turning operation fitting groove 47 and the cap C is moved to the right. Since the valve body 8 is also rotated clockwise, as a result, when the cap C is attached to the plug B, the check means 14 is switched to the check release state.
Other configurations are the same as those of the first embodiment.

[Third Embodiment]
FIGS. 11 to 13 show another embodiment of the city gas supply connector according to the present invention, in which the cylindrical socket front end portion 2 in which the gas inlet 1 is open and the gas inlet 1 can be connected to the gas supply destination. A socket A having a socket base 3, and a plug B having a cylindrical plug tip 5 in which a gas outlet 4 is opened and a plug base 6 capable of connecting the gas outlet 4 to a gas supply source. As shown in FIG. 13, the socket tip 2 is externally fitted to the plug tip 5 to connect the socket A and the plug B so that the gas supply destination can be connected to the gas supply source. It is.

  Inside the plug B, a slide-type valve body 8 capable of opening and closing the gas outlet 4 is mounted so as to reciprocate in the direction of the cylinder axis, and a compression coil spring 10 is interposed between the valve body 8 and the plug base 6. 11 and 12, as shown in FIGS. 11 and 12, elastic O-rings (an example of an annular hermetic seal material) 23 are attached to annular grooves 21 and 22 formed on the outer peripheral surface of the valve body. Biasing means capable of elastically urging the valve body 8 is configured so that 24 moves to a closed position that is in airtight contact with the inner circumferential surfaces 27 and 28 of the plug B over the entire circumference. .

  The valve body 8 is integrally provided with a small-diameter portion 25 on the gas outlet side and a large-diameter portion 26 on the plug base side in a concentric manner, and an elastic O-ring is provided in each of the small-diameter portion 25 and the large-diameter portion 26. 23 and 24 are mounted, and the elastic O-rings 23 and 24 are slidable in the direction of the cylinder axis in a state where the elastic O-rings 23 and 24 are in close contact with the inner peripheral surfaces 27 and 28 of the plug B over the entire circumference. A closed position within a certain length range in the axial direction of the cylinder axis along which the elastic O-rings 23 and 24 are interposed over the entire circumference between the outer peripheral surface of the valve body 8 and the inner peripheral surfaces 27 and 28 of the plug B. It is provided to be movable.

  Further, a pressing shaft member 13 capable of pressing the end face on the gas outlet side of the valve body 8 moving to the closed position is provided on the inner side of the socket A so as to be concentric with the cylindrical shaft core X, as shown in FIGS. As shown in the figure, each of the elastic O-rings 23, against the urging force of the compression coil spring 10 causes the valve body 8 that has been moved to the closed position as the socket front end 2 is externally fitted to the plug front end 5. The plug B is configured to be capable of being pressed and moved to an open position where the close contact with the inner peripheral surfaces 27 and 28 of the plug B is released.

  Then, the check means 14 capable of checking the pressing movement of the valve body 8 moving to the closed position toward the open position against the urging force of the compression coil spring 10 can be released by a specific operation on the check means 14. The valve body 8 and the plug B are provided.

As shown in FIGS. 11 and 12, the restraining means 14 rotates the valve body 8 and the plug B together by rotating the valve body 8 moving to the closed position around the cylinder axis X. The joint portion 29 is provided so as to extend over the outer peripheral surface of the distal end side of the small diameter portion of the valve body 8 and the inner peripheral surface of the plug B.
The threaded portion 29 is composed of a male screw portion 30 formed on the distal end side of the valve body 8 and a female screw portion 31 formed on the gas flow outlet side inner peripheral surface of the plug B.

Then, a rotation operation tool 20 such as a hexagon wrench is fitted into a rotation operation locking hole 19 such as a hexagon hole formed in the tip end surface of the small diameter portion of the valve body 8, and the valve is operated by the rotation operation tool 20. When the body 8 is rotated in the direction in which the body 8 is screwed into the plug B, the male screw portion 30 enters the female screw portion 31 by the urging force of the compression coil spring 10 and moves to the closed position as shown in FIG. While the body 8 is screwed to the plug tip 5, the pressing movement of the valve body 8 toward the open position against the urging force of the compression coil spring 10 can be restrained, and the male screw portion 30 A specific operation for releasing the screwing of the valve body 8 with respect to the plug tip 5 as shown in FIG. 12 by rotating the valve body 8 screwed to the female thread portion 31 in the reverse direction by the rotation operation tool 20. It is configured to be able to release checks.
Other configurations are the same as those of the first embodiment.

[Fourth Embodiment]
Although not shown, in the third embodiment, for example, by forming the small diameter portion 25 on the gas outlet side constituting the valve body 8 and the large diameter portion 26 on the plug base side separately, the valve body 8 is formed. The valve body is divided into a plurality of valve body constituent members in the direction of the cylinder axis X, and these valve body constituent members are screwed together in a concentric shape, or are fitted together in a concentric shape. 8, a biasing means (compression coil spring) of the valve body 8 moving to the closed position over the valve body constituent member and the plug B on the gas outlet side among the valve body constituent members The restraining means 14 that can restrain the pressing movement toward the opening position against the urging force of 10 may be provided so that the restraint can be released by a specific operation.
Other configurations are the same as those of the third embodiment.

[Fifth Embodiment]
14 to 19 show another embodiment of the connector for supplying city gas according to the present invention, in which the plug distal end portion 5 and the plug base portion 6 are arranged, and the rear end face 54 of the plug distal end portion 5 is made larger than the inner peripheral surface of the plug base portion 6. A plug B that is inserted into the inner side and is integrally fastened and fixed concentrically is provided, and the range of movement of the valve body 8 elastically biased by the compression coil spring 10 toward the closed position side is 8b and the rear end face 54 of the plug front end portion 5 are configured to be regulated.

  The valve body 8 is provided with an elastic O-ring 11 for hermetic sealing that is in sliding contact with the valve seat 7 formed on the inner peripheral surface of the plug through hole 41 on the distal end side. The elastic O-ring 11 is provided over the entire circumference between the outer peripheral surface and the inner peripheral surface of the plug through hole 41 so as to be movable to a closed position within a certain length range in the cylinder axis direction.

Then, as shown in FIG. 14, the valve body 8 moving to the closed position is rotated about the cylinder axis X, and the valve body 8 and the plug B are connected to each other as shown in FIG. A screwing portion 29 that can be screwed is provided across the outer peripheral surface of the valve body 8 and the inner peripheral surface of the plug B, and resists the urging force of the compression coil spring 10 of the valve body 8 moving to the closed position. The check means 14 capable of checking the pressing movement toward the opening position is provided so that the check can be released by a specific operation.
The threaded portion 29 is composed of a male threaded portion 30 formed on the outer peripheral surface of the valve body 8a and a female threaded portion 31 formed on the inner peripheral surface of the plug B.

The restraining means 14 is formed with a + -shaped rotation operation fitting groove 47 on the distal end surface of the valve body 8, and a rotation operation tool 20 such as a screwdriver fitted in the fitting groove 47, at a closed position. The valve body 8 is rotated in the forward direction (in the present embodiment, counterclockwise) in which the male screw portion 30 is screwed into the female screw portion 31, so that the male screw portion 30 enters the female screw portion 31 by the urging force of the compression coil spring 10. Thus, as shown in FIG. 14, in the state where the valve body 8 moving to the closed position is screwed into the plug B, the valve body 8 moves toward the open position against the urging force of the compression coil spring 10. The valve body 8 is configured so that it can be switched to a restrained state that restrains the pressing movement, and the male screw portion 30 is screwed into the female screw portion 31, and is rotated in the reverse direction (clockwise in this embodiment) by the rotary operation tool 20. In a specific operation for releasing the screwing of the valve body 8 with respect to the plug B, As shown in 5, it is configured to be switched to restrain release state for releasing the restraint.
Reference numeral 55 denotes a check display mark provided by applying paint to the valve main body portion protruding from the gas outlet 4 in the check state in order to display that the check means 14 is switched to the check state. It is.

  FIGS. 17 to 19 show a cap C that is detachably attached to the plug B from which the socket A is removed, and a female screw portion 49 that is screwed into a male screw portion 48 formed on the outer peripheral surface of the plug base 6. And an elastic O-ring 50 for hermetic sealing to be brought into close contact with the end surface of the plug base 6, and the cap C is rotated clockwise and the female screw portion 49 is screwed into the male screw portion 48 to be attached to the plug B. As shown in FIG. 18, the gas outlet 4 is configured to be sealed.

  Then, from the state in which the cap C is attached to the plug B shown in FIG. 18, the valve body 8 moves toward the open position against the urging force of the compression coil spring 10 as the cap C is detached from the plug B. A linkage mechanism 51 that mechanically links the cap C and the valve body 8 is provided so that the check means 14 is switched to a check state that checks the pressing movement.

  The linkage mechanism 51 has a fitting shaft member 53 provided with a + -shaped fitting tip 52 that can be fitted in the turning operation fitting groove 47 of the valve body 8 concentrically inside the cap C. It is configured to project integrally.

  Accordingly, as shown in FIG. 18, the fitting tip as shown in FIG. 18 is attached to the plug B in which the restraining means 14 is not switched to the restrained state as shown in FIG. 52 is fitted in the turning operation fitting groove 47, and the attached cap C is rotated counterclockwise so as to be detached from the plug B, and the turning operation fitting is performed by the urging force of the compression coil spring 10. The valve body 8 in which the mating groove 47 is fitted to the fitting front end 52 also rotates counterclockwise, and the male screw portion 30 is screwed to the female screw portion 31. As shown in FIG. It is switched to the check state.

When the cap C is attached to the plug B in which the check means 14 is switched to the check state, the fitting tip 52 is fitted into the turning operation fitting groove 47 and the cap C is moved to the right. Since the valve body 8 also rotates clockwise when the cap C is mounted, as a result, when the cap C is mounted on the plug B, the check means 14 is in the check release state. It has been switched.
Other configurations are the same as those of the second embodiment.

[Sixth Embodiment]
FIGS. 20-23 shows the modification of the linkage mechanism 51 in 5th Embodiment, and as shown in FIG. 20, in the front end surface of the valve body 8, the circular fitting hole 60 concentric with the cylinder axis X is provided. The four concave grooves 61 are formed radially with the fitting hole 60 as a center, and a + -shaped turning operation fitting groove 47 is formed, and as shown in FIG. On the inner side, a fitting shaft portion 62 concentrically entering the fitting hole 60 and a −-shaped fitting tip portion 52 that can be fitted across the left and right concave grooves 61 sandwiching the fitting hole 60 are integrally formed. The fitting shaft member 53 provided is movably mounted in the cylinder axis X direction, and an urging mechanism 63 capable of elastically urging the fitting shaft member 53 toward the mouth side of the cap C is provided. Configured.

  The fitting shaft portion 62 is provided at the center position in the width direction of the fitting tip portion 52 so as to protrude toward the mouth side of the cap C.

  The boss member 64 is fixed to the inside of the cap C so as not to be relatively rotatable around the cylinder axis X, and the movable member 66 is not relatively rotatable in the boss hole 65 of the boss member 64 and is moved in the cylinder axis X direction. The fitting shaft member 53 is integrally provided on the movable member 66, and the fitting shaft member 53 is mounted together with the movable member 66 so as to be reciprocally movable in the cylinder axis X direction.

  The urging mechanism 63 has a coil spring mounted inside a cylindrical portion 67 integrally formed on the bottom surface of the movable member 66, and the fitting shaft member 53 moves toward the inner bottom surface side of the cap C together with the movable member 66. Accordingly, when the coil spring 63 is compressed and deformed, the elastic restoring force is provided so that the fitting shaft member 53 can be elastically pressed and biased so as to return and move toward the mouth side of the cap C. In a free state where the coil spring 63 is not compressed and deformed, the fitting shaft member 53 has moved greatly toward the mouth side of the cap C.

  Further, as shown in FIGS. 22 and 23, the male threaded portion 30 of the valve body 8 that has come out of the female threaded portion 31 can freely enter the inner end side of the female threaded portion 31 at the plug tip 5 of the plug B. A space S is formed.

The switching operation of the check mechanism 14 by the linkage mechanism 51 will be described.
FIG. 22 shows the plug B in which the check means 14 is switched to the check release state, that is, as shown in FIG. 22 (a), the male threaded portion 30 of the valve body 8 and the female threaded portion 31 of the plug B are screwed together. The case where the cap C is attached to the released plug B is shown. As shown in FIG. 22B, the fitting shaft portion 62 enters the fitting hole 60 concentrically, and the fitting tip portion A cap C is applied concentrically to the plug B so that 52 is fitted over the left and right concave grooves 61 sandwiching the fitting hole 60, and the coil spring 63 is compressed and deformed as shown in FIG. Then, while the fitting shaft member 53 is relatively moved toward the inner bottom surface side of the cap C, the cap C is rotated clockwise (in the positive direction) to be screwed and fixed to the plug B.

  When the cap C is screwed into the plug B, the fitting tip 52 is fitted over the left and right concave grooves 61, so that the valve body 8 rotates clockwise, but the valve body 8 at this time Since the male screw part 30 idles in the screw release direction with respect to the female screw part 31, the check means 14 is maintained in the check release state.

  Next, when the cap C is rotated counterclockwise (in the reverse direction) with respect to the plug B, the fitting shaft member 53 moves with respect to the cap C, as shown in FIG. The valve body in a state in which the fitting tip 52 is fitted over the left and right concave grooves 61 by the urging force of the compression coil spring 10 while relatively moving according to the feed amount accompanying the screwing with the screw 31. 8 rotates, and the male thread part 30 of the valve body 8 is screwed into the female thread part 31.

  That is, the screw pitch in the screw portions 48 and 49 for screwing the cap C to the plug B is different from the screw pitch in the screw portions 30 and 31 for screwing the valve body 8 to the plug B. Even when the cap C is rotated, the screw pitches 48 and 49 are screwed up while absorbing the difference in screw pitch by the relative movement of the fitting shaft member 53 and the cap C in the direction of the cylinder axis X. The operation and the screwing operation at the screw portions 30 and 31 can be performed simultaneously.

  Then, the cap C is further rotated to release the screwing of the male screw part 30 to the female screw part 31 in the middle of releasing the screwing of the female screw part 49 of the cap C and the male screw part 48 of the plug B. 30 enters the space S, and the cap C is further rotated while the male screw portion 30 is idled in the space S, so that the cap C is removed from the plug B as shown in FIG.

  Accordingly, as shown in FIG. 23 (e), in the state where the cap C is removed from the plug B, the male screw portion 30 enters the void S, so that the check mechanism 14 is moved to the closed position. The pressing movement toward the open position against the urging force of the coil spring 10 is switched to a check state in which the end of the male screw 30 and the end of the female screw 31 are checked.

  Further, from the state shown in FIG. 23 (e), the valve body 8 is rotated clockwise by the rotation operation tool 20, the male screw portion 30 is screwed into the female screw portion 31, and the male screw portion 30 is the female screw portion 31. As shown in FIG. 22 (a), it is possible to switch to a check release state in which the check is released, by a specific operation in which the screw is screwed until it exits.

In this embodiment as well, when the cap C is attached to the plug B in which the check means 14 is switched to the check state, the fitting tip 52 is fitted over the left and right concave grooves 61. In this state, since the cap C is rotated and mounted clockwise, the valve body 8 also rotates clockwise when the cap C is mounted, and the screwing of the male thread portion 30 of the valve body 8 to the female thread portion 31 is released. As a result, in the state where the cap C is attached to the plug B, the check means 14 is switched to the check release state as shown in FIG.
Other configurations are the same as those of the fifth embodiment.

[Seventh Embodiment]
24 and 25 show a modification of the linkage mechanism 51 in the sixth embodiment. The length (lead) of the female thread 31 at the plug tip 5 of the plug B is the length of the male thread 30 of the valve body 8. The female threaded portion 49 of the cap C and the male threaded portion 48 of the plug B extend over the entire length of the female threaded portion 31 of the plug distal end portion 5. The cap C is formed so as to be detachable from the plug B with the number of rotations smaller than the number of rotations of the valve body 8 required for screwing.

The switching operation of the check mechanism 14 by the linkage mechanism 51 will be described.
FIG. 24 shows the plug B in which the restraining means 14 is switched to the restraining release state, that is, as shown in FIG. 24 (a), the male threaded portion 30 of the valve body 8 and the female threaded portion 31 of the plug B are screwed together. The case where the cap C is attached to the released plug B is shown. As shown in FIG. 24 (b), the fitting shaft portion 62 enters the fitting hole 60 concentrically, and the fitting tip portion A cap C is applied concentrically to the plug B so that 52 is fitted over the left and right concave grooves 61 sandwiching the fitting hole 60, and the coil spring 63 is compressed and deformed as shown in FIG. Then, while the fitting shaft member 53 is relatively moved toward the inner bottom surface side of the cap C, the cap C is rotated clockwise (in the positive direction) to be screwed and fixed to the plug B.

  When the cap C is screwed into the plug B, the fitting tip 52 is fitted over the left and right concave grooves 61, so that the valve body 8 rotates clockwise, but the valve body 8 at this time Since the male screw part 30 idles in the screw release direction with respect to the female screw part 31, the check means 14 is maintained in the check release state.

  Next, when the cap C is rotated counterclockwise (reverse direction) with respect to the plug B, as shown in FIG. 25 (d), the fitting shaft member 53 with respect to the cap C has the male screw portion 30 and the female screw portion. The valve body in a state in which the fitting tip 52 is fitted over the left and right concave grooves 61 by the urging force of the compression coil spring 10 while relatively moving according to the feed amount accompanying the screwing with the screw 31. 8 rotates, and the male thread part 30 of the valve body 8 is screwed into the female thread part 31.

  Then, the cap C is further rotated to release the screwed engagement between the female threaded portion 49 of the cap C and the male threaded portion 48 of the plug B as shown in FIG. In the state, as described above, the cap C can be detached from the plug B with the number of rotations smaller than the number of rotations of the valve body 8 required for screwing the male thread portion 30 of the valve body 8 over the entire length of the female thread portion 31. Thus, the screw threading of the male screw part 30 with respect to the female screw part 31 stops at an intermediate position in the longitudinal direction of the female screw part 31.

  Therefore, as shown in FIG. 25 (e), in the state where the cap C is removed from the plug B, the male screw portion 30 is screwed into the female screw portion 49, so that the check mechanism 14 is moved to the closed position. The state is switched to a check state in which the pressing movement toward the open position against the urging force of the coil spring 10 of the body 8 is checked.

Further, from the state shown in FIG. 25 (e), the valve body 8 is rotated clockwise by the rotation operation tool 20, and the male screw portion 30 is screwed until it comes out of the female screw portion 31. As shown in (b), it is configured to be switchable to a check release state for releasing the check.
Other configurations are the same as those of the sixth embodiment.

[Other Embodiments]
1. In the gas supply connector according to the present invention, a pin that can be inserted through the plug and the valve body in the radial direction of the plug is detachably provided, and the pin is inserted through the plug and the valve body. There may be provided a checking means that checks the pressing movement toward the opening position against the urging force of the urging means of the valve body and can release the restraint by a specific operation of extracting the pin from the valve body.
2. The gas supply connector according to the present invention may be used to connect the gas supply destination to a gas supply source by using a device that does not consume gas such as a gas pressure measuring device as a gas supply destination. .
3. The gas supply connector according to the present invention may be used as a connector for supplying various gases other than city gas.

Longitudinal sectional view showing plug in restrained state Longitudinal sectional view showing the socket and the plug in the restrained release state Longitudinal section showing the connection between the socket and plug (A) Longitudinal sectional view showing the plug in the restrained state of the second embodiment, (B) Cross sectional view showing the plug in the restrained state of the second embodiment. (A) Perspective view of essential part showing plug in the restrained state of the second embodiment, (b) Perspective view of essential part showing the plug in the restrained release state of the second embodiment. (A) Longitudinal sectional view showing the socket of the second embodiment and the plug in the restrained release state, (B) Transverse sectional view showing the plug in the restrained release state of the second embodiment The longitudinal cross-sectional view which shows the connection state of the socket and plug of 2nd Embodiment The longitudinal cross-sectional view which shows the plug and cap of 2nd Embodiment The longitudinal cross-sectional view which shows the plug and cap of 2nd Embodiment The longitudinal cross-sectional view which shows the plug and cap of 2nd Embodiment The longitudinal cross-sectional view which shows the plug of the check state of 3rd Embodiment The longitudinal cross-sectional view which shows the socket and plug of a check release state of 3rd Embodiment The longitudinal cross-sectional view which shows the connection state of the socket and plug of 3rd Embodiment The longitudinal cross-sectional view which shows the plug of the check state of 5th Embodiment Longitudinal sectional view showing the socket of the fifth embodiment and the plug in the restrained release state The longitudinal cross-sectional view which shows the connection state of the socket and plug of 5th Embodiment A longitudinal sectional view showing a plug and a cap of a fifth embodiment A longitudinal sectional view showing a plug and a cap of a fifth embodiment A longitudinal sectional view showing a plug and a cap of a fifth embodiment The principal part perspective view which shows the plug and cap of 6th Embodiment Longitudinal sectional view showing the cap of the sixth embodiment The longitudinal cross-sectional view which shows the plug and cap of 6th Embodiment The longitudinal cross-sectional view which shows the plug and cap of 6th Embodiment A longitudinal sectional view showing a plug and a cap of a seventh embodiment A longitudinal sectional view showing a plug and a cap of a seventh embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas inlet 2 Socket front-end | tip 3 Socket base 4 Gas outlet 5 Plug front-end | tip 6 Plug base 8 Valve body 10 Energizing means 13 Pressing member 14 Checking means 15 Engagement part 23 Airtight sealing material 24 Airtight sealing material 27 Inner surface 28 Inner surface 29 of plug 29 Threaded portion 51 Coupling mechanism A Socket B Plug C Cap

Claims (4)

A socket provided with a cylindrical socket front end portion that opens a gas inlet, a socket base portion that can connect the gas inlet to a gas supply destination, a cylindrical plug front end portion that opens a gas outlet, and the gas Provided with a plug having a plug base that can be connected to and connected to the gas supply source, the socket tip is externally fitted to the plug tip, and the gas supply destination is connected to the gas supply Configure as possible
A valve body that can open and close the gas outlet is mounted inside the plug so as to reciprocate in the direction of the cylinder axis, and elastically so that the valve body moves to a closed position on the gas outlet side. Equipped with a biasing means that can be biased,
A pressing member that can be operated to press and move the valve body that is moving to the closed position to the open position against the urging force of the urging means as the socket front end is fitted to the plug front end. A gas supply connector provided in the socket,
The valve body and the plug can be released by a specific operation of a restraining means capable of restraining the pressing movement of the valve body moving to the closed position toward the open position against the biasing force of the biasing means. A gas supply connector provided over and over. An engaging portion that can engage the valve body that has been moved to the closed position in the plug base side direction with respect to the plug side is provided so as to be freely disengaged by a turning operation around the cylindrical axis of the valve body. And
In the state where the valve body is engaged in the plug base side direction with respect to the plug, the check means is restrained from being pushed toward the open position against the urging force of the urging means of the valve body. The gas supply device according to claim 1, wherein the valve body is configured to be able to be released by a specific operation of rotating the valve body around a cylinder axis to release the engagement with the plug tip. Connection tool. The valve body is in a closed position within a certain length range in the direction of the cylinder axis where an annular hermetic seal material is interposed over the entire circumference between the outer peripheral surface of the valve body and the inner peripheral surface of the plug. Provided to be movable,
A screwing portion capable of screwing the valve body and the plug to each other by a turning operation around the cylinder axis of the valve body moving to the closed position is provided on the outer peripheral surface of the valve body and the plug. Provided over the inner peripheral surface,
In the state where the valve body moving to the closed position is screwed into the plug, the check means is restrained from being pushed toward the open position against the urging force of the urging means. 2. The gas supply connector according to claim 1, wherein the gas supply connector is configured to be able to be released by a specific operation in which the valve body is rotated around a cylinder axis to release screwing with respect to the plug. A cap capable of sealing the gas outlet is detachably attached to the plug,
With the operation of detaching the cap from the plug from the attached state of the cap to the plug,
A linkage mechanism that mechanically links the cap and the valve body so that the restraining means is switched to a state that restrains the pressing movement of the valve body toward the open position against the biasing force of the biasing means. The gas supply connector according to any one of claims 1 to 3, wherein a gas supply connector is provided.

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