JP2014238130A - Gas cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reset structure of an overflow prevention valve having a simple structure and easy to assemble, in a detachable gas cock with the overflow prevention valve connected to a gas pipeline end.SOLUTION: A reset part 20 has a reset body 55 capable of directly or indirectly pushing a valve body of an overflow prevention valve 5, and an oscillation body 33 integrated with a spring 220 and oscillating with telescopic motion of the spring 220. When the spring 220 is elastically restored, the oscillation body 33 pushes the reset body 55, and restores the overflow prevention valve 5 to an initial state. When the spring is compressed, the oscillation body 33 releases the pushing state of the reset body 55, and restores the overflow prevention valve 5 to an actuation possible state.

Description

  The present invention relates to a gas stopper, and more particularly to a gas stopper including an overflow prevention valve and a reset unit that resets the overflow prevention valve.

Japanese Patent Application No. 2013-8300 was invented as a gas stopper equipped with a reset portion for resetting the excessive outflow prevention valve.
As shown in FIG. 4, a connecting screw cylinder portion (11a) to which a gas pipe joint (not shown) is screwed and connected is formed on the upstream side (lower side in the drawing) of the casing (11). The overflow prevention valve (5) is densely accommodated on the downstream side, and the reset section (10) and the plug for resetting the overflow prevention valve (5) further on the downstream side The upstream side of the part (2) is fitted and accommodated. The plug part (2) is screwed to a female screw part formed at the downstream open end (19) of the casing (11).

The plug device (2) accommodates the valve device (21) so as to be able to advance and retreat, and the reset unit (10) is disposed between the valve device (21) and the overflow prevention valve (5). The parts are set in series.
The gas flow path is closed when the overflow prevention valve (5) is operated and when the outlet flow path in the plug portion (2) is blocked by the valve device (21) as shown in FIG. Is done.

As the overflow prevention valve (5), a known valve shown in FIG. 6 can be employed. In this case, a valve body (52) that moves downstream by gas pressure is accommodated in the case body (50). In a normal state, as shown in FIG. (52) is biased by the spring (54a) to be separated from the valve seat (53).
When some abnormality occurs on the downstream side of the gas flow path in the plug portion (2) and the gas is in an excessively flowing state, the excessively flowing out prevention valve (5) is activated, as shown in FIG. As described above, the valve body (52) moves against the urging force of the spring (54a) by being pushed downstream by the gas pressure and press-fits the valve seat (53). This is the closed state of the overflow prevention valve (5). At this time, the valve shaft (52a) integrated with the valve body (52) moves to the vicinity of the reset body (55) located in a state protruding from the downstream top surface of the case body (50).

In order to release the valve closing state, the reset body (55) is pushed into the inside. When the reset body (55) is pushed, the valve body (52a) is pushed upstream by the reset body (55), and accordingly, the pressure bonding of the valve body (52) to the valve seat (53) is released. Then, as shown in FIG. 6C, the valve body (52) is returned to the original state separated from the valve seat (53) by the spring (54a).
The overflow prevention valve (5) of the gas plug (1) shown in FIG. 4 is in the state (opened state) of FIG. 6 (A), and the overflow prevention valve (5) of FIG. FIG. 6C shows a state (reset state).

  The valve device (21) includes an auxiliary valve (21a) pushed by the push-in shaft (40) of the socket, and a slide stopper (21b) that can move simultaneously with the auxiliary valve (21a). The reset portion (10) interlocked with the movement in the forward / backward direction extends from the slide plug (21b) to the upstream side, and the engagement convex portions (101a) (101b) protrude in the horizontal direction at the predetermined positions. An extension rod (101), a lever piece (102) whose both ends are bent in opposite directions and one end (102a) of the extension rod (101a) engages with an engagement protrusion (101a), and a lever piece (102 And a support cylinder (103) on which a rotation shaft (13) is rotatably supported.

If the socket is removed from the plug part (2) from the safety aspect after the overflow prevention valve (5) is activated, the valve device (21) is reset by the biasing force of the spring (23). The plug portion (2) is moved to the downstream side together with the extension rod (101) of the portion (10), and is closed as shown in FIG.
As the extension rod (101) moves downstream, the engaging projection (101a) of the extension rod (101) moves the one end (102a) of the lever piece (102) downstream. When the (102) is turned, the other end (102b) is turned to the upstream side, and the reset body (55) of the overflow prevention valve (5) in the closed valve state is moved to the case body (50 ) Can be pushed into.

  When the reset body (55) of the overflow prevention valve (5) in the closed state is pushed into the case body (50) by the other end (102b) of the lever piece (102), as described above, the valve stem (52a) is pushed by the reset body (55) and moved upstream, so that the pressure-bonding of the valve body (52) to the valve seat (53) is released, and at the same time, the valve body (52) (54a) urges the case body (50) toward the bottom (56). As a result, the overflow prevention valve (5) is reset to the initial state (the state shown in FIG. 6C).

  Thereafter, when the socket is connected to the plug portion (2) again, as shown in FIG. 4, the valve device (21) is pushed in by the pushing shaft (40) in the socket, and at the same time, the extension rod (101) is pushed. It is moved upstream (downward). As a result, the engagement of the engaging protrusion (101a) with the one end (102a) of the lever piece (102) is released, and the reset body (55) is in the other end of the lever piece (102) in the free state. It is released from the pressed state by (102b), and is returned to the initial state protruding from the case body (50) as shown in FIG. 6 (A) by the urging force of the spring (54b).

Japanese Patent Laid-Open No. 10-169812 JP 2000-297870 A

  In the above conventional gas stopper, friction powder is not generated even when the socket is repeatedly attached to and detached from the plug portion (2) as disclosed in JP-A-10-169812. Prevents inconvenience that the valve body in the overflow prevention valve after operation becomes difficult to be reset due to deformation of the part or deterioration of the function due to adhesion to the parts constituting the reset part However, the reset part (10) is composed of an extension rod (101) interlocked with the movement of the valve device (21) and a lever piece (102) engaged with the extension rod (101), and the lever piece (102) is rotated. In order to pivotally support it, the rotating shaft (13) and the support cylinder (103) that supports the rotating shaft must be set, which increases the number of parts, the structure is complicated, and the assembly is troublesome. is there.

The present invention is a gas plug in which a gas pipe connection is provided at the upstream open end of the casing and a socket connection plug is provided at the downstream open end,
An overflow prevention valve that automatically shuts off the gas passage when a certain amount of gas flows through the gas passage;
A reset unit for returning the overflow prevention valve after operation to an initial state;
A valve device that is accommodated in the plug portion so as to be movable in a forward and backward direction, and opens and closes the plug portion;
In the gas stopper provided with a spring for urging the valve device in a direction to close the plug portion, the number of parts constituting the reset portion is reduced, and a gas stopper that can be easily assembled is provided. Let it be an issue.

The gas stopper of the invention according to claim 1 is: “The overflow prevention valve is set to be operable in a socket mounted state, and the overflow prevention valve after the operation is in a socket removed state by the reset unit. It is set to be able to return to the initial state,
The reset portion includes a pushing portion that can push the valve body of the overflow prevention valve directly or via a pushing member, and is integrated with the spring and swings as the spring expands and contracts. Become
When the valve device moves in a direction to close the plug portion by the biasing force of the spring, the swinging body swings in a direction in which the pushing portion pushes the valve body of the overflow prevention valve back to the initial state. ,
When the valve device is moved in a direction to open the plug portion, the spring is compressed, and at the same time, the rocking body is swung in a direction to release the pushing state of the valve body of the overflow prevention valve by the pushing portion. It is set to move ”.

The technical means operates as follows.
The overflow prevention valve is accommodated in the casing, and is set so that it can operate in a state where the socket is attached to the plug portion. When the socket is removed when the overflow prevention valve is actuated, the valve device moves in the direction of closing the plug portion by the elastic return force of the spring (downstream side), and at the same time the swinging body swings, The pushing part of the rocking body pushes the valve body of the overflow prevention valve after the operation directly or indirectly. As a result, the valve body of the overflow prevention valve after operation returns to the initial state, and the overflow prevention valve is reset.
Then, after the abnormality on the downstream side is repaired, when the socket is connected to the plug portion, the valve device moves in the direction of opening the plug portion (upstream side), and at the same time, the rocking body prevents excessive outflow by the pushing portion. It swings in the direction to release the pressed state of the valve body.

According to a second aspect of the present invention, there is provided the gas stopper according to the first aspect of the invention, wherein the oscillating body is provided with the pushing portion at one end, and the pushing portion is a valve body of the overflow prevention valve. Is pivotally supported in the direction to push in,
The spring includes a retractable coil spring portion interposed with the upstream end fixed between the valve device and the oscillating body, and a first extension extending further upstream from the upstream end of the coil spring portion. 1 extension shaft and a second extension shaft extending from the downstream end of the spring portion to the upstream side,
A pivot shaft of the oscillating body projecting in a perpendicular direction to an extension end of the first extension shaft;
The extension end of the second extension shaft is engaged with the other end of the oscillator,
In the closed state of the gas spigot where the coil spring portion has been elastically restored, the extension end of the second extension shaft is located downstream of the extension end of the first extension shaft, and the gas in which the coil spring portion is compressed When the stopper is in an open state, the second extension shaft is positioned with the expansion and contraction of the coil spring portion so that the extension end of the second extension shaft is positioned upstream of the extension end of the first extension shaft. It is possible to move in the direction of expansion and contraction ”.

Since the first extension shaft is extended from the upstream end of the coil spring portion fixed to the predetermined position to the upstream side, the rotation shaft provided at the extension end is also fixed to the predetermined position. It is in. An oscillating body is pivotally supported by the rotating shaft, and an extension end of the second extension shaft is engaged with the other end of the oscillating body. Thereby, the rocking body is integrated with the spring.
When the second extension shaft moves in the expansion / contraction direction in accordance with the expansion / contraction of the coil spring portion, the other end of the oscillating body with which the extension end is engaged is also moved in the same direction. It rotates around the rotation axis.
As described above, the rotation shaft of the first extension shaft serves as a rotation fulcrum of the oscillating body, and the pushing portion provided on the oscillating body serves as an action point. The extension end of the second extension shaft functions as a force point for swinging the swinging body.
When the socket is removed from the plug portion after the overflow prevention valve is actuated, the coil spring portion is elastically restored, and the extension end of the second extension shaft is located downstream of the extension end of the first extension shaft. To move. In response to this, the rocking body is rotated in the direction in which the other end moves to the downstream side and one end moves to the upstream side, and the pushing portion provided at the one end of the rocking body prevents excessive outflow after operation. Push the valve body directly or indirectly. Thereby, the excessive outflow prevention valve is reset.
When the socket is reconnected to the plug portion after the excessive gas outflow state has been repaired, the valve device is pushed upstream by the pushing shaft in the socket, so that the coil spring portion is compressed and the second extension shaft The extension end of the first movement shaft moves so as to be located upstream of the extension end of the first extension shaft. As a result, the oscillating body rotates in the opposite direction to the above, releases the pushing state of the valve body of the overflow prevention valve by the pushing portion, and the valve body of the overflow prevention valve returns to the initial state.

According to a third aspect of the present invention, there is provided the gas plug according to the second aspect of the present invention, wherein "the engagement shaft projects in a direction perpendicular to the extension end of the second extension shaft,
An engagement hole for inserting the engagement shaft is formed at the other end of the rocking body, and a shaft hole for rotatably inserting the rotation shaft is formed at a substantially central portion of the rocking body.
The engagement hole is a long hole extending toward the shaft hole side ”.
An engagement shaft that protrudes from the extension end of the second extension shaft is inserted into an engagement hole formed in the other end of the rocking body, and a rotating shaft is inserted into a shaft hole formed in a substantially central portion of the rocking body. As a result, the oscillating body rotates about its substantially central portion as the second extension shaft moves. The movement trajectory of both ends when the rocking body rotates will show a convex arc on the outside, but the engagement hole formed in the other end is a long hole extending toward the shaft hole side, The engaging shaft slides in the elongated hole toward the center in accordance with the rotation of the swinging body, so that the second extending shaft has a spring portion without applying a load in the convex direction to the outside. The movement along the direction of expansion and contraction can be maintained.

  As described above, according to the gas stopper according to the present invention, the rocking body constituting the reset unit is integrated with the spring originally provided in the gas stopper, and is interlocked with the expansion and contraction of the spring. Since the valve body of the overflow prevention valve can be pushed or released indirectly, the number of parts constituting the reset portion is reduced, and the structure is simplified to facilitate assembly.

  In particular, as the spring, the first extension shaft is extended from the upstream end of the coil spring portion, the second extension shaft is extended from the downstream end to the upstream side, and the swing shaft is projected on the extension end of the first extension shaft. The moving body is pivotally supported so that the extension end of the second extension shaft is engaged with the other end of the swinging body, so that the swinging body is integrated with the spring and can be handled as one unit. . As a result, when the plug portion is removed from the casing, the spring and the rocking body can be taken out together, so that the inspection, repair, and replacement of each component are facilitated, and the workability of various operations is improved.

  Further, in the case where the engagement hole provided at the other end of the rocking body and engaged with the engagement shaft provided at the extension end of the second extension shaft is a long hole, the rocking body is rotated around the rotation shaft. Even if it is made to do, since a convex load is not applied to the second extension shaft, no radial force is applied to the downstream end of the spring portion which is the base end portion of the second extension shaft. As a result, the durability can be improved, the swinging body can be smoothly rotated, and the pushing-in operation and the releasing operation of the valve body of the overflow prevention valve can be performed smoothly.

It is sectional drawing which shows the normal use condition of the gas stopper of embodiment of this invention. It is explanatory drawing of the spring employ | adopted as the gas stopper of embodiment of this invention. It is sectional drawing which shows the state which the overflow prevention valve of the gas stopper of embodiment of this invention was reset. It is sectional drawing which shows the normal use condition of the conventional gas stopper. It is sectional drawing which shows the state which the conventional overflow prevention valve of the gas stopper was reset. It is explanatory drawing of the overflow prevention valve used for a gas stopper, (A) shows the normal time, (B) shows the time of valve closing, (C) shows the mode at the time of reset.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a sectional view showing a normal use state of a gas stopper according to an embodiment of the present invention.
The gas plug (3) according to the embodiment of the present invention has a plug part (4) screwed to the downstream open end (39) of the casing (31), as in the conventional one. .
The casing (31) is tightly accommodated from the upstream side (lower side in the drawing) with a connecting screw cylinder (31a) to which a gas pipe joint (not shown) is screwed and connected, and an overflow prevention valve (5). The small-diameter cylindrical portion (31b) and the large-diameter cylindrical portion (31c) that is larger in diameter than the small-diameter cylindrical portion (31b) and that accommodates a part of the plug portion (4) and the reset portion (20) described later are straightened. The male screw formed at the intermediate position of the plug part (4) is formed on the female screw part formed at the downstream open end (39) of the large diameter cylindrical part (31c). The screw part is screwed.

  The valve device (21) housed in the plug part (4) is integrated with the auxiliary valve (21a) and the auxiliary valve (21a) which are pushed by the socket pushing shaft (40), as in the conventional device. The slide plug (21b) has a large-diameter cylindrical portion (211) that is movable to the upstream side, and the valve device (21) is connected to the plug portion (4 on the upstream side of the slide plug (21b). A coil spring portion (22) that constitutes a spring (220) that urges in the direction of closing.

  The coil spring portion (22) is fitted at both ends into the upstream open end of the cylindrical portion (211) of the slide plug (21b) and the groove portion (41) formed near the upstream open end in the plug portion (4). From the upstream end of the coil spring portion (22) received in the plug portion (4) in a state of being interposed between the spring receiving portion (42) and being fixed to the spring receiving portion (42). A first extension shaft (221) extends upstream (downward in the drawing). A second extension shaft (222) is also extended upstream from the downstream end of the coil spring portion (22) that presses the cylindrical portion (211) of the slide plug (21b) downstream. The second extension shaft (222) is set to be positioned on the outer side in the radial direction of the coil constituting the coil spring portion (22) with respect to the first extension shaft (221).

  Further, as shown in FIG. 2, from the extension end of the first extension shaft (221), a rotation shaft (25) for pivotally supporting a rocking body (33) to be described later is provided as a first extension shaft (221). ), And an engagement shaft (26) to be inserted into an engagement hole (36) formed in the rocking body (33) from the extension end of the second extension shaft (222). The second extending shaft (222) is provided so as to project in a direction perpendicular to the second extending shaft (222) and in the projecting direction of the rotating shaft (25).

Since the upstream end of the coil spring portion (22) is placed on the spring receiving portion (42), the coil spring portion (22) is positioned in the plug portion (4) and extends from the first extension shaft (221). ) And the rotation shaft (25) projecting in the right-angle direction from the extended end are also positioned at a predetermined position regardless of the expansion and contraction of the coil spring portion (22).
As shown in FIGS. 2 and 3, when the coil spring portion (22) is elastically restored, the engagement shaft (26) is located downstream (upward in the drawing) from the rotation shaft (25). As shown in FIG. 1, when the coil spring portion (22) is compressed, the engagement shaft (26) is located upstream of the rotating shaft (25) (downward in FIG. 1). The expansion / contraction length of the coil spring portion (22) and the lengths of the first extension shaft (221) and the second extension shaft (222) are set so as to be positioned at the positions.

The rocking body (33) described above is a plate-like body interposed between the spring receiving portion (42) and the excessive outflow prevention valve (5), and the rotation of the first extension shaft (221) is provided at a substantially central portion. A shaft hole (35) through which the dynamic shaft (25) is rotatably inserted is formed, and an overflow prevention valve (5) is formed at one end of the rocking body (33) by the rotation of the rocking body (33). A pressing portion (34) capable of pressing the reset body (55) is formed. An engagement hole (36) into which the engagement shaft (26) of the second extension shaft (222) can be inserted is formed at the other end.
The engagement hole (36) is formed in a long hole shape extending toward the shaft hole (35).

  As described above, the rotation shaft (25) and the engagement shaft (26) protrude in the directions facing each other, so that these are formed in the shaft hole (35) and the engagement hole (36). Each of the swinging bodies (33) is inserted from the opposite direction, and the rotating shaft (25) and the engaging shaft (26) are prevented from dropping off from the shaft hole (35) and the engaging hole (36). Yes. In this way, the first and second extension shafts (221) and (222) of the spring (220) are integrally connected to the rocking body (33), whereby the spring (220) and the rocking body (33) are united. And can function as the reset unit (20).

  In order to assemble the gas stopper (3) of this embodiment, the valve device (21) in which the slide stopper (21b) is fitted into the auxiliary valve (21a) and integrated, and the coil spring portion of the spring (220) ( 22) are accommodated in order from the upstream open end of the plug part (4), and the spring receiving part (42) is attached to the groove part (41) to fix them in a retaining state, and from the coil spring part (22). The rotating shaft (25) of the first extension shaft (221) protruding upstream is inserted into the shaft hole (35) of the rocking body (33) and at the same time the engaging shaft (26 of the second extension shaft (222)) ) Is inserted into the engaging hole (36) of the rocking body (33) from the opposite direction, thereby integrating the rocking body (33) with the spring (220). Thereby, the reset part (20) is integrally attached to the plug part (4).

Then, the plug portion (4) with the rocking body (33) exposed on the upstream side is disposed downstream of the casing (31) after the overflow prevention valve (5) is accommodated in the small diameter cylindrical portion (31b). The gas stopper (3) can be assembled by housing the large-diameter cylindrical part (31c) from the side open end (39) and screwing the plug part (4) into the downstream open end (39). Complete.
In this way, the reset unit (20) is configured by unitizing the spring (220) and the oscillating body (33) that urge the valve device (21) in the direction to close the plug unit (2). Since the plug portion (4) can be accommodated in the retaining state, the total number of parts is reduced, and the assembling work is facilitated.

  The gas flow path passes from the connecting screw cylinder (31a) through the overflow prevention valve (5) in the initial state, into the large diameter cylinder (31c), and the notch (4a) of the plug (4). ) To the plug part (4), and the gas flow path is formed when the overflow prevention valve (5) is activated and the socket is removed as shown in FIG. When the flow path in the plug part (4) is blocked by the device (21), it is closed. At this time, the valve device (21) is moved to the downstream side of the plug portion (4) by the elastic return force of the coil spring portion (22), and the outer peripheral surface of the cylindrical portion (211) is downstream of the notch portion (4a). The gas flow path into the plug portion (4) is blocked by tightly fitting into the plug portion (4) on the side. That is, the outer peripheral surface of the cylindrical portion (211) functions as a valve body.

  As the overflow prevention valve (5), the known valve described in FIG. 6 can be adopted, and the gas stopper (3) is used on the downstream side of the gas flow path in the plug part (4) during use. When some abnormality occurs and the gas is excessively discharged, as shown in FIG. 6B, due to the gas pressure, the valve body (52) moves downstream against the urging force of the spring (54a). It is pushed and pressed against the valve seat (53), and the overflow prevention valve (5) is closed.

After the overflow prevention valve (5) is actuated to be closed, the socket is once removed from the plug portion (4) in order to repair the excessive outflow state of the gas. Then, the elastic return force of the coil spring portion (22) moves the valve device (21) to the downstream side, and the plug portion (4) is closed as shown in FIG.
Since the second extension shaft (222) moves downstream with the elastic return of the coil spring portion (22), the engagement shaft (26) also moves further downstream than the rotation shaft (25), The oscillating body (33) rotates in such a direction that the other end having the engagement hole (36) with which the engagement shaft (26) is engaged is moved to the downstream side, and one end having the pushing portion (34) is moved to the upstream side. By moving, the pushing portion (34) pushes the reset body (55) of the overflow prevention valve (5) into the case body (50).

  When the valve shaft (52a) is pushed upstream by the reset body (55) pushed into the case body (50), as shown in FIG. 6 (C), the urging force of the spring (54a) The body (52) returns to the original state separated from the valve seat (53), and the overflow prevention valve (5) is reset to the initial state.

  Further, when the second extension shaft (222) moves downstream, the engagement shaft (26) slides in the long hole-shaped engagement hole (36) toward the shaft hole (35) while moving the rocking body. Since the other end of (33) is pulled downstream, even if the other end of the rocking body (33) rotates so as to draw an outwardly convex arc, the second extension shaft (222) There is no convex load on the outside. Therefore, the second extension shaft (222) moves straight along the expansion / contraction direction of the coil spring portion (22) without applying a radial force to the second extension shaft (222) or the coil spring portion (22). Can be made. As a result, the durability of the reset unit (20) is improved, and the swinging body (33) is smoothly rotated, so that the reset operation of the overflow prevention valve (5) can be performed smoothly.

  After the overflow prevention valve (5) is reset, when the socket is connected to the plug part (4) in order to use the gas plug (3) again, as shown in FIG. At the same time that the auxiliary valve (21a) is pushed in by (40), the slide plug (21b) is moved upstream (downward), and the coil spring portion (22) is compressed. As a result, the second extension shaft (222) moves to the upstream side, and accordingly, the engagement shaft (26) moves to the upstream side of the rotation shaft (25). Therefore, the rocking body (33) rotates in the direction in which the pushing portion (34) moves to the downstream side when the other end moves to the upstream side, and the reset body (55) It is released from the pressing state by 34), and is returned to the initial state protruding from the case body (50) as shown in FIG. 6 (A) by the urging force of the spring (54b).

  When the above gas plug (3) is connected to a gas pipe installed in the wall or floor and the connection as a buried gas plug is completed, and then the inspection or repair of the gas plug (3) is performed When the plug part (4) is removed from the casing (31), the reset part (20) together with the valve device (21) is also set in the plug part (4), and the downstream open end of the casing (31) ( 39), the parts can be easily inspected, repaired and replaced, and the workability is improved.

(20) ......... Reset section
(220) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Spring
(21) ... Valve device
(3) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Gas stopper
(31) ... Case
(31a) ... Connection screw cylinder
(33) ... Oscillator
(34) ... Push-in part
(39) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Downstream open end
(4) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Plug
(5) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Overflow prevention valve
(52) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Valve
(50) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Case body
(55) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Reset body

Claims (3)

A gas plug in which a gas pipe connection is provided at the upstream open end of the casing and a socket connection plug is provided at the downstream open end,
An overflow prevention valve that automatically shuts off the gas passage when a certain amount of gas flows through the gas passage;
A reset unit for returning the overflow prevention valve after operation to an initial state;
A valve device that is accommodated in the plug portion so as to be movable in a forward and backward direction, and opens and closes the plug portion;
In the gas stopper provided with a spring for biasing the valve device in a direction to close the plug portion,
The overflow prevention valve is set in a state where it can be operated in a socket mounted state, and the overflow prevention valve after the operation is set so that it can be returned to the initial state by the reset unit in a socket removed state. And
The reset portion includes a pushing portion that can push the valve body of the overflow prevention valve directly or via a pushing member, and is integrated with the spring and swings as the spring expands and contracts. Become
When the valve device moves in a direction to close the plug portion by the biasing force of the spring, the swinging body swings in a direction in which the pushing portion pushes the valve body of the overflow prevention valve back to the initial state. ,
When the valve device is moved in a direction to open the plug portion, the spring is compressed, and at the same time, the rocking body is swung in a direction to release the pushing state of the valve body of the overflow prevention valve by the pushing portion. A gas tap that is set to move. 2. The gas stopper according to claim 1, wherein the oscillating body is provided with the pushing portion at one end and is pivotally supported so that the pushing portion can rotate in a direction of pushing the valve body of the overflow prevention valve. Has been
The spring includes a retractable coil spring portion interposed with the upstream end fixed between the valve device and the oscillating body, and a first extension extending further upstream from the upstream end of the coil spring portion. 1 extension shaft and a second extension shaft extending from the downstream end of the spring portion to the upstream side,
A pivot shaft of the oscillating body projecting in a perpendicular direction to an extension end of the first extension shaft;
The extension end of the second extension shaft is engaged with the other end of the oscillator,
In the closed state of the gas spigot where the coil spring portion has been elastically restored, the extension end of the second extension shaft is located downstream of the extension end of the first extension shaft, and the gas in which the coil spring portion is compressed When the stopper is in an open state, the second extension shaft is positioned with the expansion and contraction of the coil spring portion so that the extension end of the second extension shaft is positioned upstream of the extension end of the first extension shaft. A gas stopper that can move in the telescopic direction. The gas stopper according to claim 2, wherein an engagement shaft protrudes in a perpendicular direction from an extension end of the second extension shaft,
An engagement hole for inserting the engagement shaft is formed at the other end of the rocking body, and a shaft hole for rotatably inserting the rotation shaft is formed at a substantially central portion of the rocking body.
The engagement hole is a gas stopper that is a long hole extending toward the shaft hole.

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