JP6045261B2 - Gas stopper - Google Patents

Description

  The present invention provides a cylindrical gas stopper body having a gas flow passage formed therein, and is movable in a direction along the gas flow direction in a part of the gas flow passage, and closes the gas flow passage. The present invention relates to a gas stopper provided with a slide valve whose posture is freely changeable between an opening posture for opening the gas flow passage.

As a gas stopper for a fluid such as gas as described above, a gas connector connected to a gas pipe is attached to the gas stopper body, and the slide valve is closed from the posture by the pressing portion provided in the gas connector. There is known one that presses the opening posture upstream of the flow passage to open the gas flow passage and supplies gas to the gas appliance connected to the gas connector (see Patent Document 1).
Since the slide valve is urged so as to return to the closed position by the urging member, by removing the gas connector from the gas plug main body, the pressing by the pressing portion against the slide valve is released, and the urging member The sliding valve returns to the closed position by the urging force, and the gas supply to the gas appliance is stopped.
In the technique disclosed in Patent Document 1, the slide valve (valve body 6) is provided with a seal member (packing 7), and the gas flow passage is in a state where the slide valve is in a closed position. A valve seat portion (valve seat 9) on which the seal member of the slide valve is seated is provided on the inner peripheral wall.
And it is comprised so that a gas flow path may be in a closed state, when the sealing member (packing 7) of a slide valve (valve body 6) seats on a valve seat part (valve seat 9).

JP-A 63-88395

  In the technique disclosed in Patent Document 1, it is necessary to provide a seal member on the slide valve in order to close the gas flow passage, and the configuration is complicated. Further, since the tip of the seal member (packing 7) is formed in a plane perpendicular to the axis of the gas flow passage and the valve seat portion (valve seat 9) is formed as an inclined surface, the seal member (packing 7) and The seating site with the valve seat (valve seat 9) is in point contact, and the sealing performance may be reduced. Such a decrease in sealing performance is likely to occur when the sealing member is seated with the tip end face inclined.

  The present invention has been made in view of the above-described problems, and the object thereof is to maintain a relatively simple configuration while appropriately closing the gas flow passage in the closed posture of the slide valve. An object of the present invention is to provide a gas stopper capable of smoothly moving a slide valve between a closed posture and an open posture and ensuring stable sealing performance.

In order to achieve the above object, a gas plug is movable in a direction along a gas flow direction in a part of the gas flow passage to a cylindrical gas plug body in which a gas flow passage is formed. A gas stopper provided with a slide valve whose posture is freely changeable between a closed posture for closing a path and an open posture for opening the gas flow passage,
On the inner peripheral surface of the gas stopper main body, the outer peripheral surface of the slide valve is seated in the closed posture of the slide valve, and in the posture change between the open posture and the closed posture of the slide valve, A seating guide for guiding the slide valve so that the axis of the slide valve matches the axis of the gas flow path ;
The slide valve has a tapered body having a tapered shape on an outer peripheral surface thereof, and has a valve body that closes or opens the gas flow passage at an upstream portion in the gas flow direction,
The tapered portion is integrally formed with the valve body,
A closed posture side gas in which the valve body is a gas flow passage portion on the side in which the valve body takes the closed posture is a flow path diameter of the gas flow passage portion on the side in which the valve body takes the open posture. It is configured to be larger than the flow path diameter of the flow path part,
The seating guide portion is provided in the closed posture side gas flow path portion,
The gas stopper main body includes a valve seat portion having a reverse taper shape in which the taper-shaped portion is seated on an inner peripheral surface of the slide valve in the closed posture.
The valve seat portion functions as the seating guide portion .

According to the above characteristic configuration, the seating guide portion provided on the inner peripheral surface of the gas stopper main body is configured such that the outer peripheral surface of the slide valve can be directly seated, so while maintaining a relatively simple configuration, The gas flow passage can be properly closed, and a stable sealing property can be secured.
Furthermore, since the seating guide unit guides the movement between the closing posture and the opening posture of the slide valve, the slide valve can be smoothly moved.
As a result, it is possible to smoothly move the slide valve between the closed posture and the open posture while adopting a relatively simple configuration and appropriately closing the gas flow passage in the closed posture. it can.
Furthermore, according to the above-described characteristic configuration, the taper-shaped portion of the slide valve is seated on the reverse-tapered valve seat portion provided on the inner peripheral surface of the gas stopper main body in a state where the slide valve is in the closed posture. With the configuration, the gas flow passage can be closed, and the valve seat portion has an inversely tapered shape, so that it effectively functions as a seating guide portion that smoothly guides the tapered portion of the slide valve.
Furthermore, according to the above characteristic configuration, when the flow path diameter of the gas flow passage part in the opening posture is larger than the flow path diameter of the gas flow passage part in the closed position, that is, in the gas flow passage, the flow diameter is Even in the case of change, by providing the guide function part of the seating guide part in the gas flow passage part on the closed posture side, in particular, the valve body which is the upstream part of the slide valve is located inside the gas plug body. The movement can be smoothly guided at the gas flow path portion that easily interferes with the peripheral surface.

Further features of the gas stopper of the present invention are as follows :
Before SL gas flow path is that is configured in a straight line along the direction of movement between the said closed and posture opened posture of the slide valve.

  According to the above characteristic configuration, the gas flow passage is linear, and the flow path diameter of the open posture side gas flow passage portion is larger than the flow passage diameter of the closed posture side gas flow passage portion, that is, a straight line. Even in the case where the diameter of the gas flow passage is changed, the sliding function is provided by providing the guide function portion of the seating guide portion in the closed posture side gas flow passage portion. The movement can be smoothly guided in the gas flow path portion that easily interferes with the inner peripheral surface of the gas.

Further features of the gas stopper of the present invention are as follows:
The gas flow passage is connected to a first linear portion along a moving direction between the closing posture and the opening posture of the slide valve, and a state having a predetermined angle with the first linear portion. A second linear portion;
The gas flow direction is a direction from the side of the first linear portion where the slide valve takes the closing posture toward the second linear portion,
The seating guide portion is provided on the upstream side of the connection portion with the second linear portion of the first linear portion.

Further features of the gas stopper of the present invention are as follows:
The gas flow passage is connected to a first linear portion along a moving direction between the closing posture and the opening posture of the slide valve, and a state having a predetermined angle with the first linear portion. A second linear portion;
The gas flow direction is a direction from the side of the second linear portion toward the side of the first linear portion where the slide valve takes the closing posture,
The seating guide portion is provided on the downstream side of the connection portion with the second linear portion of the first linear portion.

  According to the above characteristic configuration, the gas flow passage is connected to the first linear portion in a state having a predetermined angle in addition to the first linear portion along the moving direction of the slide valve. Even when the gas flow passage is bent in an L shape, the seating guide portion is located upstream of the connection portion with the second linear portion of the first linear portion. By providing it on the side or downstream side, the gas flow passage can be properly closed, and the slide valve can smoothly guide the movement of the slide valve at the connection portion where the slide valve easily interferes with the inner peripheral surface of the gas plug body. it can.

Further features of the gas stopper of the present invention are as follows:
An overflow prevention valve for preventing excessive outflow of gas upstream of the slide valve in the gas flow direction of the gas flow passage;
A reset operation that is arranged between the slide valve and the overflow prevention valve in the gas flow direction and resets the overflow prevention valve by movement of the slide valve between the closed position and the open position; It is in the point provided with the reset means to perform.

  According to the above characteristic configuration, the reset operation for resetting the overflow prevention valve is performed by the reset means by the movement of the slide valve that smoothly moves between the closed posture and the open posture. It can be executed reliably and the safety can be improved.

Sectional drawing of the gas connector and gas stopper in the state which has removed the gas connector in 1st Embodiment from the gas stopper main body Sectional drawing of the gas connector and gas stopper in the state which has mounted | wore the gas stopper main body with the gas connector in 1st Embodiment Sectional drawing which shows the movement of the gas stopper in 1st Embodiment Sectional drawing of the gas stopper in another embodiment Side sectional view which shows the state at the time of opening of the gas stopper of 2nd Embodiment The disassembled perspective view which shows the slide valve and operation mechanism part of the gas stopper of 2nd Embodiment Side sectional view which shows the state at the time of the action | operation of the excessive outflow prevention valve of the gas stopper of 2nd Embodiment Side sectional view which shows the state in the middle of closing operation of the gas stopper of 2nd Embodiment Side sectional view which shows the state at the time of closing of the gas stopper of 2nd Embodiment Explanatory drawing explaining the transition state of the position of the guide pin in the guide groove at the time of the capping operation | movement in 2nd Embodiment. Explanatory drawing explaining the transition state of the position of the guide pin in the guide groove at the time of the opening operation | movement in 2nd Embodiment. Side sectional view which shows the state at the time of closing of the gas stopper of 3rd Embodiment Side sectional view which shows the state at the time of opening of the gas stopper of 3rd Embodiment Side sectional view showing the state when the gas plug of the reference form is closed Side sectional view showing the state when the gas plug of the reference form is opened Side cross-sectional view showing the shape of the seating guide portion according to the reference embodiment Side cross-sectional view showing the shape of the first valve body according to the reference embodiment

The gas stopper according to the present invention can appropriately close the gas flow passage while adopting a relatively simple configuration, and can smoothly move the slide valve between the closed posture and the open posture. Further, the present invention relates to a material that can improve the sealing performance.
Hereinafter, the embodiment will be described with reference to the drawings.
[First Embodiment]
As shown in FIGS. 1 and 2, the gas stopper according to the first embodiment includes a cylindrical gas stopper body 2 in which a gas flow passage 1 is formed, and a gas connection is made to the gas stopper body 2. The gas flow passage 1 is provided by supplying the gas to the gas appliance connected to the gas connection tool 100 by gas flow in the gas flow passage 1 by attaching the tool 100 and removing the gas connection tool 100 from the gas plug body 2. It is configured as a so-called gas outlet that stops the gas flow in the gas and stops the gas supply to the gas appliance.
FIG. 1 shows a state where the gas connector 100 is removed from the gas plug body 2, and FIG. 2 shows a state where the gas connector 100 is attached to the gas stopper body 2.

  The gas plug main body 2 includes a slide valve G that can freely open and close the gas flow passage 1, and an overflow prevention valve H2 that prevents gas flow when the gas flow rate in the gas flow passage 1 exceeds a certain level. And a reset means R for performing a reset operation for resetting the excessive outflow prevention valve H2 when the gas connector 100 is detached from the gas plug body 2. Here, the reset operation is an operation of pressing the operated member H3 in the excessive outflow prevention valve H2 to the upstream side of the gas flow passage 1.

  The gas flow passage 1 has a circular cross section, and is provided in a straight line along the axial direction (X direction in FIGS. 1 and 2) of the gas plug body 2. The gas flow direction of the gas flow passage 1 is the same direction. The gas flow passage 1 includes a plurality of flow path portions 1a to 1f whose flow path diameters are changed, and prevents excessive outflow in order from the upstream side in the gas flow direction (the right side in the X direction in FIGS. 1 and 2). An overflow prevention mechanism H provided with a valve H2, a reset means R, and a slide valve G are provided. As a plurality of flow path parts, the first flow path part 1a, the second flow path part 1b, the third flow path part 1c, the fourth flow path part 1d, and the fifth flow path part 1e in order from the upstream side in the gas flow direction. , A sixth flow path portion 1f is provided. The first flow path part 1a communicates with a gas inlet (not shown), the second flow path part 1b is formed with the same diameter as the first flow path part 1a, and the overflow prevention mechanism H Has been placed. The third flow path portion 1c is formed with a flow path diameter larger than that of the second flow path portion 1b, and the reset means R is disposed. On the inner peripheral surface of the gas plug main body 2 forming the fourth flow path portion 1d, an inversely tapered portion 30 that reduces the flow path diameter from the upstream side to the downstream side is provided, and the fifth flow path portion 1e is It is the same diameter as the flow path diameter on the downstream side of the fourth flow path part 1d, and the sixth flow path part 1f is formed in an inclined shape that makes the flow path diameter smaller on the downstream side than on the upstream side, The gas outlet body 3 communicates with a gas outlet 3 formed at the distal end portion.

  The slide valve G includes a first valve body G1 capable of closing the fourth flow path portion 1d in the gas flow passage 1, and a second valve body G2 capable of closing the sixth flow path portion 1f in the gas flow passage 1. It has.

The first valve body G1 is provided so as to be movable along the axial direction of the gas plug body 2 over the third flow path part 1c, the fourth flow path part 1d, and the fifth flow path part 1e.
The first valve body G1 is provided with a tapered portion G1a having a tapered shape on the outer peripheral surface on the upstream side, and the tapered portion G1a has a closed posture (the posture shown in FIG. 1) of the first valve body G1. ), The first valve body G1 is opened and seated on the reverse tapered portion 30 provided in the gas plug main body 2 forming the fourth flow path portion 1d (an example of the closed posture side gas flow passage portion). 2 (position shown in FIG. 2), it is located in the third flow path part 1c (an example of the open posture side gas flow passage part).
The first valve body G1 has a tapered shape portion G1a that forms the fourth flow path portion 1d when the posture is changed between the closed posture (the posture shown in FIG. 1) and the open posture (the posture shown in FIG. 2). The axial center of the first valve body G1 is guided so as to be held by the axial center of the gas flow passage 1 by the reverse tapered portion 30 provided in the gas stopper main body 2. Thereby, the 1st valve body G1 can prevent interfering with the internal peripheral surface of the gas stopper main body 2. FIG. Furthermore, since the taper-shaped part G1a of the first valve body G1 is in the closed posture in the state of being seated on the reverse taper-shaped part 30 provided in the gas stopper main body 2 forming the fourth flow path part 1d, it is sufficiently wide. A seating area can be secured to ensure sealing performance.
In other words, in the present application, the reverse tapered portion 30 of the gas plug body 2 forming the fourth flow path portion 1d seats the tapered portion G1a of the first valve body G1 of the slide valve G and opens it. Acts as a seating guide for guiding the movement between the posture and the closed posture.
The downstream end of the first valve element G1 is provided with a shaft part G1b that extends downstream along the axial center thereof. The first valve element G1 is connected to the first valve element G1 by the shaft part G1b. It is connected with the two-valve element G2.

The second valve body G2 is provided so as to be movable along the axial direction of the gas plug body 2 over the fifth flow path part 1e and the sixth flow path part 1f.
The outer diameter of the downstream end portion of the second valve body G2 is shaped along the inclined portion of the sixth flow path portion 1f, and the valve seat on which the second valve body G2 is seated is the sixth flow path portion 1f. It is comprised in the inclination part.
When the second valve element G2 moves to the sixth flow path part 1f, the second valve body G2 takes a closed posture (position shown in FIG. 1) to close the sixth flow path part 1f, and moves to the fifth flow path part 1e. An open posture (the posture shown in FIG. 2) that allows distribution is taken.
An upstream portion of the second valve body G2 is provided with an outer peripheral portion G2a that surrounds the shaft portion G1b of the first valve body G1. The second valve body G2 has its surrounding portion G2a surrounding the shaft portion G1b of the first valve body G1, so that the shaft center is held at the shaft center of the first valve body G1.
Further, the second valve body G2 is pressed by the first valve body G1 from the upstream side toward the downstream side, and when the gas connector 100 is removed, the second valve body G2 is closed to be seated on the sixth flow path portion 1f. Return to posture.
In this way, both the first valve body G1 and the second valve body G2 constituting the slide valve G are movable between the closed posture and the open posture along the axial direction of the gas plug body 2, and the gas The flow passage 1 is biased so as to return to a closed posture.

The gas connector 100 that can be attached to and detached from the gas plug body 2 will be described. Since the gas connector 100 has a known configuration, a detailed description thereof will be omitted and will be briefly described.
In the gas connector 100, the positions of the protruding member 102, the locking ball 103, and the locking ball 103 that are biased forward by the first coil spring 101 (the right side in the X direction in FIGS. 1 and 2) are set in the radial direction. An inner diameter member 104 that is pressed against the front end of the gas stopper main body 2 and is retracted, and a rod-like pressing portion 105 that presses the slide valve G when the gas stopper main body 2 is mounted. It has.

  When the gas connector 100 is attached to the gas plug main body 2, as shown in FIG. 2, the distal end portion of the gas plug main body 2 abuts against the inner diameter member 104, so that the inner diameter member 104 is biased by the second coil spring 106. Retire against. When the inner diameter member 104 is retracted, the locking ball 103 moves inward in the radial direction, the locking ball 103 is fitted into the fitting groove 2 a formed in the gas plug main body 2, and the protruding member 102 is the first coil spring 101. It protrudes to the front side (right side in the X direction in FIG. 2) by the urging force. In this way, the locking ball 103 of the gas connector 100 is fitted into the fitting groove 2 a of the gas plug body 2, so that the gas connector 100 is externally mounted on the gas plug body 2. When the gas connector 100 is attached to the gas plug body 2, the slide valve G is pressed by the pressing portion 105 of the gas connector 100. By pressing against the slide valve G by the pressing portion 105, both the first valve body G1 and the second valve body G2 are located upstream of the gas flow passage 1 along the axial direction of the gas plug body 2 (X direction in FIG. 2). The gas flow path 1 is opened and gas is supplied to the gas appliance.

  When the gas connector 100 is removed from the gas plug body 2, the locking member 103 is fitted into the fitting groove 2a by pushing the protruding member 102 against the urging force of the first coil spring 101. Since it is released, the gas connector 100 can be removed from the gas plug body 2. When the gas connector 100 is removed from the gas plug body 2, the pressing by the pressing portion 105 against the slide valve G is released, and both the first valve body G1 and the second valve body G2 are biased by the biasing member F1. Accordingly, the gas flow passage 1 is moved to the downstream side (right side in the X direction in FIG. 2) along the axial direction of the gas plug body 2 to return from the open position to the closed position, and the gas flow path 1 is closed. The

  The excessive outflow prevention mechanism H is disposed in the second flow path portion 1b of the gas flow path 1, and includes a cylindrical member H1 in which a flow path for circulating gas is formed. Inside the cylindrical member H1, there is an overflow prevention valve H2 that is movable in the axial direction of the gas plug body 2 between an initial position that allows gas flow and an operating position that blocks gas flow, and a reset operation from the reset means R. As a result, the operated member H3 (corresponding to the operated part) that receives the pressing operation to the upstream side of the gas flow passage 1, and the overflow prevention valve H2 and the operated member H3 are movable in the axial direction of the gas plug body 2. And a supporting member H4 for supporting the above.

  The overflow prevention valve H2 is urged by the third urging member F3 so as to return to the initial position upstream of the operating position, and is held at the initial position by contacting the contact member H5. ing. The overflow prevention valve H2 is provided so as to be freely movable from the initial position to the operating position by the flow pressure of the gas flow rate when the gas flow rate exceeds a certain level. H2 is seated on the valve seat H6 and prevents gas flow.

  The support member H <b> 4 is formed in a cylindrical shape whose inside penetrates in the axial direction of the gas plug main body 2. The upstream portion of the support member H4 is externally fitted to the shaft portion H2a of the overflow prevention valve H2, and supports the overflow prevention valve H2 so as to be movable in the axial direction of the gas plug body 2. The downstream portion of the support member H4 is externally fitted to the operated member H3, and supports the operated member H3 so as to be movable in the axial direction of the gas plug body 2.

  The upstream portion H3a of the operated member H3 is formed in a rod shape extending in the axial direction of the gas stopper main body 2, is fitted into the support member H4, and is supported so as to be movable in the axial direction of the gas stopper main body 2. Yes. The downstream portion of the operated member H3 is formed in a substantially conical shape provided with a head portion H3b that protrudes downstream in the central portion of the gas flow passage 1 in the flow path radial direction. On the outer side in the radial direction of the head portion H3b, a leg portion H3c extending outward in the radial direction is provided, and the distal end portion of the leg portion H3c is engaged with an engaging groove H1a formed in the tubular member H1. Yes. Although illustration is omitted, a plurality of leg portions H3c are provided at intervals in the circumferential direction, and gas flows between the leg portions H3c. The operated member H3 is urged by the fourth urging member F4 so that the head portion H3b at the downstream side portion returns from the cylindrical member H1 to the protruding position where it protrudes to the downstream side of the gas flow passage 1. The portion H3c abuts against the end of the engagement groove H1a and is held at the protruding position.

The support member H4 has an excessive outflow in a state in which an interval corresponding to the amount of movement from the initial position to the operating position is separated between the excessive outflow prevention valve H2 positioned at the initial position and the operated member H3 positioned at the protruding position. The prevention valve H2 and the operated member H3 are supported so as to be movable in the axial direction of the gas plug body 2. Thereby, the excessive outflow prevention mechanism H is moved from the initial position of the excessive outflow prevention valve H2 when the reset operation in which the operated member H3 located at the protruding position is pressed upstream of the gas flow passage 1 is released. Movement to the operating position is allowed.
On the other hand, when the overflow prevention valve H2 is moved to the operating position by the flow pressure at a gas flow rate above a certain level, the overflow prevention valve H2 that has moved to the operating position comes into contact with the operated member H3 that is located at the protruding position. ing. When the operated member H3 located at the protruding position is subjected to a reset operation that is pressed to the upstream side of the gas flow passage 1, the operated member H3 and the overflow prevention valve H2 are brought into contact with the operated member H3. The overflow prevention valve H2 integrally moves to the upstream side of the gas flow passage 1, the seating of the overflow prevention valve H2 on the valve seat portion H6 is released, and the gas pressure from the upstream side is released. The overflow prevention valve H2 is returned to the initial position by the urging force of the third urging member F3. In this way, the excessive outflow prevention mechanism H sets the excessive outflow prevention valve H2 to the initial position when the operated member H3 located at the protruding position receives a reset operation that is pressed to the upstream side of the gas flow passage 1. I am returning.

  When the gas connector 100 is detached from the gas stopper main body 2, the reset means R is excessive as the slide valve G moves from the open position to the closed position in the axial direction of the gas stopper main body 2. In order to return the outflow prevention valve H2 to the initial position (in order to reset it), a reset operation for pressing the head H3b of the operated member H3 to the upstream side of the gas flow passage 1 is performed.

  The reset means R is a single oscillating member R1 that can oscillate around an axis P along a flow path radial direction (the front and back direction in FIG. 1 and FIG. 2) perpendicular to the gas flow direction of the gas flow passage 1. And a fifth member that urges the swinging member R1 to return to the operation position (see FIGS. 3A and 3D) for resetting the operated member H3 in the overflow prevention valve H2. An urging member F5 (corresponding to the first urging means) and a pressing member R2 that presses and swings the swinging member R1 as the slide valve G moves from the closed position to the open position are provided.

  The swing fulcrum of the swing member R1 is disposed at the center of the gas flow path 1 in the flow path radial direction, and the head H3b of the operated member H3 in the overflow prevention mechanism H is also the flow path diameter of the gas flow path 1. It is arranged at the center of the direction. The pressing portion R2a where the pressing member R2 presses the swinging member R1 is disposed at an eccentric position that deviates from the central portion of the gas flow passage 1 in the flow path radial direction to the end side. The swing member R1 has one end portion thereof as a pressed portion R1a that receives a pressing action at the pressing portion R2a of the pressing member R2, and the other end portion is reset with respect to the head H3b of the member H3 to be operated. As the pressing operation portion R1b for performing the above operation, the central portion is used as a swing fulcrum. As shown in FIG. 1, when the swinging member R1 is located at the operation position, the oscillating member R1 positions the pressed portion R1a at the end of the gas flow passage 1 in the flow path radial direction, and the pressing operation portion R1b. The gas flow passage 1 is formed in an L shape that is positioned at the center in the radial direction of the flow path. In this way, the pressing action portion R2a is disposed at an eccentric position that is deviated from the central portion of the gas flow passage 1 in the flow passage radial direction toward the end portion, and therefore from the central portion in the flow passage radial direction of the gas flow passage 1. It can be used as an installation space for the swing member R1 over one side and the other side. Moreover, when it is located at the operation position, the pressed portion R1a is positioned at the end of the gas flow passage 1 in the flow passage radial direction, and the pressure operation portion R1b is located at the center of the gas flow passage 1 in the flow passage radial direction. Therefore, the pressing operation portion R1b and the head H3b of the operated member H3 can be opposed to each other in the axial direction of the gas plug main body 2, and the reset operation can be appropriately performed.

  The swing member R1 is swung to one side (counterclockwise in the figure) in the swing direction by the fifth biasing member F5 and returned to the operation position (see FIGS. 3A and 3D). It is energized to do. As shown in FIG. 3 (d), the pressing operation portion R1b has an inclined surface, and when the swinging member R1 swings to the operation position, the inclined surface is moved to the head H3b of the operated member H3. A reset operation for pressing the head H3b toward the upstream side of the gas flow passage 1 is performed.

  The pressing member R <b> 2 is integrally formed with the first valve body G <b> 1 so as to have a rod shape that extends from the upstream end of the first valve body G <b> 1 that is the slide valve G to the upstream side of the gas flow passage 1. As shown in FIGS. 3 (b) and 3 (c), the pressing member R2 has a gas flow path along the axial direction of the gas plug body 2 as the slide valve G moves from the closed position to the open position. 1, the swing member R1 is pressed and swung to a position deviated from the operation position to the other side in the swing direction (clockwise in the figure).

Hereinafter, the movement of the slide valve G, the excessive outflow prevention mechanism H, and the reset means R will be described with reference to FIG.
FIG. 3A shows a state where the gas connector 100 is removed from the gas plug body 2. FIG. 3B shows a state in which the gas connector 100 is mounted on the gas plug body 2. FIG. 3C shows a state in which the excessive outflow prevention valve H2 has moved from the initial position to the operating position when the gas connector 100 is mounted on the gas plug body 2. FIG. FIG. 3D shows a state in which the reset operation is performed by removing the gas connector 100 from the gas plug body 2.

  As shown in FIG. 3A, when the gas connector 100 is removed from the gas plug body 2, the slide valve G is in the closed position, and the gas flow path 1 is closed by the slide valve G. It is spoken. At this time, the swinging member R1 is biased so as to return to the operation position by the biasing force of the fifth biasing member F5, so that the pressing operation portion R1b of the swinging member R1 is the head of the operated member H3. A reset operation for pressing the portion H3b to the upstream side of the gas flow passage 1 is performed. This reset operation returns the excessive outflow prevention valve H2 to the initial position. FIG. 3A shows a state in which the excessive outflow prevention valve H2 is returned to the initial position.

  As shown in FIG. 3 (b), when the gas connector 100 is attached to the gas plug body 2, the pressing portion 105 of the gas connector 100 presses the slide valve G to the upstream side of the gas flow passage 1, and the slide valve G moves from the closed position to the open position to open the gas flow passage 1. At this time, with the movement of the slide valve G, the pressing member R2 presses and swings the swinging member R1 to the other side in the swinging direction (clockwise in the figure), and the swinging member R1 has come off the operating position. Swing to position. By this swinging of the swinging member R1, the reset operation in which the pressing operation portion R1b of the swinging member R1 presses the head H3b of the operated member H3 to the upstream side of the gas flow path 1 is released. When the reset operation is released, the head H3b of the operated member H3 is returned to the protruding position by the urging force of the fourth urging member F4. In this way, when the operated member H3 is returned to the protruding position, the movement of the overflow prevention valve H2 from the initial position to the operating position is allowed between the operated member H3 and the overflow prevention valve H2. A space is formed.

  As shown in FIG. 3 (c), when the gas flow rate exceeds a certain level, the overflow prevention valve H 2 is moved downstream of the gas flow passage 1 along the axial direction of the gas plug body 2 by the flow pressure of the gas flow rate. The overflow prevention valve H2 moves from the initial position to the operating position. Thereby, the gas flow is blocked by the excessive outflow prevention valve H2 moving to the operating position.

  As shown in FIG. 3 (d), when the gas connector 100 is removed from the gas plug body 2, the pressure of the gas connector 100 on the upstream side of the gas flow passage 1 against the slide valve G by the pressing portion 105 is released. The slide valve G moves from the open posture to the closed posture along the axial direction of the gas plug body 2 by the biasing force of the first biasing member F1 and the second biasing member F2. At this time, with the movement of the slide valve G, the pressing member R2 is separated from the swinging member R1, the pressing swinging by the pressing member R2 with respect to the swinging member R1 is released, and the swinging by the biasing force of the fifth biasing member F5 The moving member R1 swings to one side (counterclockwise in the figure) in the swing direction and returns to the operation position. When the swinging member R1 returns to the operation position, a reset operation is performed in which the pressing operation portion R1b of the swinging member R1 presses the head H3b of the operated member H3 to the upstream side of the gas flow passage 1. As shown in (a), the overflow prevention valve H2 is returned to the initial position.

  As shown in FIGS. 3A to 3D described above, even when the first valve body G1 moves, the first valve body G1 as the gas plug G is closed (shown in FIG. 3A). In the posture change between the posture) and the open posture (posture shown in FIGS. 3B, 3C, and 3D), the tapered portion G1a can be seated on the reverse tapered portion 30 of the fourth flow path portion 1d. In addition, since the movement of the reverse tapered portion 30 is guided so that the axis of the first valve body G1 is held by the axis of the gas flow passage 1, the first valve body G1 is In particular, in the open posture, it is possible to prevent shaft shake. Thereby, the 1st valve body G1 can prevent interfering with the internal peripheral surface of the gas stopper main body 2. FIG.

[Second Embodiment]
In the embodiment described so far, the gas valve according to the present invention is moved between the closed posture and the open posture with the attachment and removal of the gas connector 100 from the gas plug body 2. The gas plug according to the present invention is configured as a so-called gas outlet that switches between supply and stop of gas to the gas appliance. An embodiment configured as a so-called gas cock that performs switching between supply and stop of gas to a gas appliance will be described with reference to FIGS. In addition, about the structure similar to embodiment described so far, description may be omitted.

As shown in FIGS. 5 and 6, the gas stopper configured as a gas cock according to the present embodiment includes a valve housing portion 5, a gas inflow passage 1 </ b> A and a gas outflow passage 1 </ b> B that open to the valve housing portion 5, respectively. However, it is accommodated in the gas stopper main body 2 formed inside, the valve accommodating part 5, and the valve mechanism part A that opens and closes between the gas inflow path 1A and the gas outflow path 1B, and the operation on the operation part 11 And an operating mechanism B that opens and closes the valve mechanism A.
Hereinafter, detailed configurations of the gas stopper main body 2, the valve mechanism portion A, and the operation mechanism portion B will be sequentially described.

[Gas stopper body]
Each of the gas inflow passage 1A (an example of the first linear portion) and the gas outflow passage 1B (an example of the second linear portion) is arranged inside the gas plug body 2 in a state where the axes X and Y intersect each other at right angles. It is a channel which has a circular section arranged in. Specifically, the gas plug of the present embodiment is configured as a so-called L-shaped gas plug by arranging the axis X of the gas inflow passage 1A in the vertical direction and arranging the axis Y of the gas outflow passage 1B in the horizontal direction. Has been. The L-shaped gas plug thus configured discharges the gas g flowing into the gas plug main body 2 from the bottom to the top in a horizontal direction, and is applied to a gas device (not shown) or the like disposed on the side. Supply. In the present embodiment, the gas stopper is not configured as the L-shaped gas stopper, but the crossing angle between the gas inlet path 1A and the gas outlet path 1B is appropriately set, for example, by providing the gas outlet path 1B obliquely downward. It can be modified.
Further, the valve accommodating part 5 is a space having a circular cross section formed inside the gas stopper main body 2 on the upper extension of the gas inflow path 1A, and the gas inflow path 1A opens below the valve accommodating part 5. The gas outflow passage 1B is opened to the side of the valve accommodating portion 5.

(Valve mechanism)
The valve mechanism part A is formed in the opening 1Aa with respect to the valve accommodating part 5 of the gas inflow passage 1A, and slides along the axis X to be seated on the valve seat part to close the opening 1Aa. A closed posture (posture shown in FIG. 5) and an open posture that slides along the axis X and separates from the inversely tapered portion 30 to open the opening 1Aa (posture shown in FIGS. 7, 8, and 9) And a slide valve G ′ that is displaced between the two.
That is, the slide valve G ′ slides in the vertical direction along the axis X of the gas inflow passage 1A arranged in the vertical direction. The upper end position of the slide range is a closed posture where the slide valve G ′ closes the opening 1Aa, and the lower end position of the same range is an open posture where the slide valve G ′ opens the opening 1Aa. Therefore, in the present embodiment, the closed posture side indicates the upper side, and the open posture side indicates the lower side.
The slide valve G ′ includes a tapered portion G′a at an upstream portion thereof and a shaft portion G′b that abuts against a slide portion C of an operation mechanism portion described later at a downstream portion thereof.
The valve seat of the gas inflow passage 1A functions as a seating guide portion that seats the tapered portion G′a of the slide valve G ′ and guides the movement between the open posture and the closed posture of the slide valve G ′. It is configured as an inversely tapered portion 30.
Further, the reverse tapered portion 30 is provided on the upstream side of the connection portion with the gas outflow passage 1B in the gas inflow passage 1A in order to appropriately guide between the closed posture and the open posture of the slide valve G ′. It has been.
Thereby, the flow direction of the gas g in the gas inflow passage 1A (an example of the first linear portion) and the gas outflow passage 1B (an example of the second linear portion) is determined by the closing posture of the slide valve G ′ in the gas inflow passage 1A. The direction is from the side taking the gas toward the gas outflow passage 1B.

  The slide valve G ′ is urged by the coil spring 24 from the upstream side (lower side in FIG. 5) to the downstream side (upper side in FIG. 5), and receives a pressing operation from the operating mechanism. The closed posture (posture shown in FIG. 5) is maintained in a natural state.

(Operation mechanism)
The operation mechanism unit B transmits a downward pressing operation on the operation unit 11 by the operator to the slide valve G ′ and opens the slide unit C along the axis X along the slide line C, which can slide together with the slide valve G ′. It comprises an axis urging means D that urges upward from the posture side toward the closed posture side, and a guide portion 20 that guides the slide of the slide portion C.
The operation portion 11 is provided as an upper surface of the upper bottom portion of the reverse cup-shaped operation button 10 that is arranged coaxially with the axis X of the gas inflow passage 1A and covers the upper portion of the gas plug body 2.
The operation button 10 is provided so as to be slidable in the vertical direction along the axis X. Further, the operation button 10 is provided between the lower surface of the upper bottom portion of the operation button 10 and the upper surface of the gas plug body 2. A coil spring 13 for biasing the operation button 10 upward is inserted.
The coil spring 13 is an ordinary coil spring in which winding portions are separated from each other between adjacent ones. When the coil spring 13 receives a compressive force along the axis X, an expansion force is generated along the coaxial line X. .

The slide portion C includes a guide pin 18 that is rotatably provided around the axis X, and a rotation biasing means E that biases the guide pin 18 in a direction around the axis X.
The guide pin 18 is disposed coaxially with the axis X and is formed to protrude outward in the radial direction of the circular cross section of the shaft member 17 on the outer surface of the cylindrical shaft member 17 that can slide along the axis X. Yes.
On the other hand, the rotation urging means E has one end fixed to the lower surface of the upper bottom portion of the operation button 10 and the other end fixed to the upper surface of the shaft member 17 so as to be coaxial with the axis X of the gas inflow passage 1A. The torsion coil spring 15 is arranged.
The torsion coil spring 15 is a coil spring in which the winding portions are in close contact with each other between adjacent portions, and receives a torsional moment in a certain rotation direction, thereby rotating in the direction opposite to the rotation direction (right direction in FIG. 6). Generates a repulsive force. Furthermore, the torsion coil spring 15 is configured such that the winding portion is in close contact with each other between adjacent portions, so that the downward pressing force along the axis X of the operation unit 11 received from one end side is applied to the shaft member on the other end side. 17 can be transmitted.
Protrusions 16 are provided at both ends of the torsion coil spring 15, and a winding portion including the protrusions 16 is formed on the groove 12 formed on the lower surface of the upper bottom of the operation button 10 and on the upper surface of the shaft member 17. By fitting into the formed groove portion 19, both ends of the torsion coil spring 15 are fixed to the operation button 10 and the shaft member 17.

The axis urging means D is composed of a normal coil spring 24 whose winding portions are separated from each other between adjacent ones, and generates an expansion force along the coaxial line X by receiving a compression force along the axis X.
This coil spring 24 is inserted in a compressed state along the axis X between the lower surface of the slide valve G ′ and the upper surface of the cylindrical member H1 provided below the valve housing portion 5. In a form in which the slide valve G ′ is urged upward with respect to the upper surface of H1, the slide part C including the slide valve G ′ is urged upward along the axis X from the open posture side toward the closed posture side.

The guide portion 20 is configured by a cylindrical member 21 having a guide groove 22 formed on the outer surface for guiding the guide pin 18 to slide on the axis line X and to rotate around the axis line X.
Further, the guide groove 18 is rotated against the biasing force of the torsion coil spring 15 when a pressure is applied to the operating portion 11 to displace the slide valve G ′ from the closed position to the open position. Rotation guides 22a, 22b, and a locking mechanism in which the guide pin 18 biased by the coil spring 24 and the torsion coil spring 15 is locked while the slide valve G ′ is maintained in the open position when the pressing force is subsequently released. A portion 22c is formed.
With such a configuration, the gas stopper according to this embodiment will be described later in detail, but the opening operation is performed by one pressing operation on the operation unit 11, and the subsequent pressing operation on the operation unit 11 is performed. A so-called push-push type opening / closing operation in which a closing operation is performed is realized.

As shown in FIG. 10A, in the guide groove 22, the end portions on the rotation posture side of the rotation guide portions 22 a and 22 b are locking portions in the rotation direction against the urging force around the axis X of the torsion coil spring 15. It is located on the far side of rotation (for example, the left side in FIG. 10A) from 22c. A bulging portion 22d formed by the guide groove 22 bulging in the urging direction side (that is, the upper side) along the axis X of the coil spring 24 from the opening posture side end of the rotation guiding portions 22a and 22b to the locking portion 22c. Is formed.
Therefore, the guide pin 18 can be directly moved along the upper side of the guide groove 22 from the end portion on the opening posture side of the rotation guide portions 22a and 22b toward the locking portion 22c via the bulging portion 22d. Thus, it is appropriately locked to the locking portion 22c. The shape and the like of the bulging portion 22d can be changed as appropriate, and the bulging portion 22d is omitted to form a locking portion 22c that cuts upward in the middle of the opening posture side rotation guiding portion 22b. When the pressing force f11 applied to the operation unit 11 is removed with the guide pin 18 at the posture side end, the guide pin 18 opens and the posture side rotation guiding portion 22b is slightly reversed to be in the middle You may comprise so that it may be latched by 22c.

The rotation guiding portions 22a and 22b are arranged in the opening posture side rotation guiding portion 22b arranged in the opening posture side with respect to the locking portion 22c in the direction around the axis X, and arranged in the closing posture side than the locking portion 22c. It comprises a closed posture side rotation guiding portion 22a.
Furthermore, when the orthogonal plane of the axis X of the gas inflow passage 1A is S, the lead angle αb of the guide groove 22 with respect to the orthogonal plane S in the opening posture side rotation guiding portion 22b is the same lead angle αa of the closing posture side rotation guiding portion 22a. Is set smaller than.
That is, in the plug opening operation, the guide pin 18 that is applied with the pressing force to the operation portion 11 and is guided along the rotation guide portions 22a and 22b is between the closed posture side and the position where the locking portion 22c is formed. The opening posture side rotation guiding portion is displaced along the closed posture side rotation guiding portion 22a and from the position where the locking portion 22c is formed to the end portion on the opening posture side formed on the rotation back side. It will be displaced along 22b.
Since the lead angle αb of the opening posture side rotation guiding portion 22b is smaller than the lead angle αa of the closing posture side rotation guiding portion 22a, the guide pin 18 is opened against the biasing force of the torsion coil spring 15, and the posture side rotation guiding is performed. The pressing force with respect to the operation unit 11 necessary for displacement along the portion 22b is larger than when the displacement is performed along the closed posture side rotation guiding portion 22a.
Hereinafter, the detailed configuration of the guide groove 22 will be described based on FIGS. 10 and 11 together with the transition state of the guide pin 18 in the guide groove 22 during the opening and closing operation of the gas stopper of the present embodiment. 10 and 11, the guide groove 22 is shown in a state where the outer peripheral surface of the cylindrical member 21 is developed on a plane.

(When opening)
First, the transition state of the position of the guide pin 18 in the guide groove 22 during the opening operation of the gas stopper according to the present embodiment will be described with reference to FIG.
When the slide valve G ′ is in the closed position and is closed (see FIG. 5), the guide pin 18 is in the closed position side of the rotation guide portion 22a in the guide groove 22 as shown in FIG. Is located at the end (upper right end in FIG. 10A).
Next, when a pressing force f11 is applied to the operation portion 11 and the pressing force f11 is transmitted to the slide portion C, the guide pin 18 provided on the slide portion C is as shown in FIG. The guide groove 22 moves to the boundary between the closing posture side rotation guiding portion 22a and the opening posture side rotation guiding portion 22b.
During this movement, the guide pin 18 is displaced downward from the closed posture side toward the open posture side against the upward biasing force fd from the open posture side toward the closed posture side along the axis X by the coil spring 24. At the same time, the torsion coil spring 15 rotates against the urging force fe in the direction around the axis X.
That is, the upward biasing force fd and the rightward biasing force fe in FIG. 10B are applied to the guide pin 18 located at the boundary between the closing posture side rotation guiding portion 22a and the opening posture side rotation guiding portion 22b. It has been added.

Further, when a relatively large pressing force f11 is applied to the operation portion 11, the guide pin 18 is opened in the guide groove 22 in the opening posture side rotation guiding portion 22b as shown in FIG. c), the slide valve G ′ is displaced to the open posture (see FIG. 7).
Also in this movement, the guide pin 18 moves in the lower left direction against the upward biasing force fd by the coil spring 24 and the rightward biasing force fe by the torsion coil spring 15, and the guide pin 18 after the movement Is a state in which an upward biasing force fd and a rightward biasing force fe are added.
The urging forces fd and fe increase as the amount of displacement of the guide pin 18 in the lower left direction increases, but the same reference numerals are used to simplify the explanation.

Next, when the pressing force f11 applied to the operation unit 11 is removed as described above, an upward biasing force fd by the coil spring 24 and a rightward application by the torsion coil spring 15 are obtained as shown in FIG. Due to the force fe, the guide pin 18 moves along the bulging portion 22d to a position where it abuts on the locking portion 22c in the upper right direction.
The angle of the wall surface with which the guide pin 18 of the locking portion 22c abuts is such that the guide pin 18 to which the resultant force of the urging forces fd and fe is applied is prevented from being displaced toward the rotation guide portions 22a and 22b. Since the guide pin 18 is set, the position of the guide pin 18 is maintained in a state of being locked to the locking portion 22c. As a result, as shown in FIG. 8, the slide valve G ′ is maintained in the open posture. Thus, the opening operation is completed.

[When closing operation]
Next, the transition state of the position of the guide pin 18 in the guide groove 22 during the gas stopper closing operation of the present embodiment will be described with reference to FIG.
When the slide valve G ′ is in the open posture and is opened (see FIG. 5), the guide pin 18 is in a position where it is locked to the locking portion 22c as shown in FIG. 11 (a). It is in.
Next, when a relatively small pressing force f11 ′ is applied to the operation portion 11 and the pressing force f11 ′ is transmitted to the slide portion C, the guide pin 18 provided on the slide portion C is moved to the position shown in FIG. As shown in FIG. 2, the lever is slightly displaced in the lower left direction against the urging forces fd and fe, so that the latching portion 22c is unlocked.
At this time, since the pressing force f11 ′ applied to the operation unit 11 is smaller than the pressing force f11 applied during the above-described opening operation, the guide pin 18 is, for example, an opening posture side rotation guiding unit. There is no displacement toward the open posture along 22b.
Further, the lead angle αb of the opening posture side rotation guiding portion 22b is smaller than the lead angle αa of the closing posture side rotation guiding portion 22a, and the guide pin 18 is opened against the urging force fe of the torsion coil spring 15. Since a relatively large pressing force is required to displace to the opening posture side along 22b, the guide pin 18 opens when the operating portion 11 is pressed with a pressing force f11 'smaller than the pressing force. There is no displacement toward the back of the rotation along the posture side rotation guiding portion 22b.

Next, when the pressing force f11 ′ applied to the operation unit 11 as described above is removed, an upward biasing force fd by the coil spring 24 and a rightward application by the torsion coil spring 15 are removed as shown in FIG. Due to the force fe, the guide pin 18 moves in the upper right direction along the closing posture side rotation guiding portion 22a.
As a result, the slide valve G ′ is displaced from the open posture to the closed posture, and the closing operation is completed.
In the present embodiment, the rotation guide portion of the guide groove 22 is configured by the closed posture side rotation guide portion 22a and the open posture side rotation guide portion 22b, but the rotation guide portion may be configured by a uniform one. I do not care. Further, the lead angles αa and αb of the rotation guide portions 22a and 22b are not uniform and can be modified as appropriate, for example, gradually decreasing from the closed posture side to the open posture side.

[Overflow prevention mechanism]
As shown in FIG. 5, the gas stopper according to the present embodiment shuts off the gas supply when a gas g having a flow rate higher than a certain level flows, so that the gas inflow passage 1A is provided with an excessive outflow prevention valve H2 as shown in FIG. An outflow prevention mechanism H is provided, and further, a reset means R for performing a reset operation for resetting the excessive outflow prevention valve H2 by the movement of the slide valve G ′ between the closed posture and the open posture is provided.
Here, since the configurations of the overflow prevention valve H2 and the reset means R are basically the same as those of the first embodiment, a detailed description thereof is omitted, but on the lower surface of the slide valve G ′. The protruding pressing member 7 corresponds to the pressing member R2 of the first embodiment, and the pressing member 7 presses and swings the swinging member R1 as the slide valve G ′ moves. A reset operation is performed.
That is, in a state where the gas flow is blocked by the outflow prevention valve H2 being moved to the operating position when the slide valve G ′ is in the open posture (see FIG. 9), the slide valve G ′ is moved to the closed posture. When the swinging member R1 is pressed and swung by the pressing member 7 to shift to the other swinging direction (counterclockwise) (see FIG. 5), the swinging member R1 is moved to the operation release position (see FIG. 5). 9), the overflow prevention valve H2 is released from being seated on the valve seat H6, and the overflow prevention valve H2 is returned to the initial position by the urging force of the third urging member F3. In this manner, the reset operation is performed.

  Also in the second embodiment, the slide G ′ has a tapered shape G ′ in a posture change between a closed posture (posture shown in FIG. 5) and an open posture (posture shown in FIGS. 7, 8, and 9). A is guided by the reverse tapered portion 30 of the gas inflow path 1A so that the axis of the slide valve G ′ is held by the axis of the gas inflow path 1A. Thereby, the slide valve G can prevent interference with the inner peripheral surface of the gas stopper main body 2.

[Third Embodiment]
In the third embodiment, as shown in FIGS. 12 and 13, the gas flow path 1 is configured such that the gas outflow path 1 </ b> B (the first flow path 1 </ b> B) extends along the moving direction between the closing position and the opening position of the slide valve G. 1 example of a straight portion) and a gas inflow passage 1A (an example of a second straight portion) connected to the gas outflow passage 1B in a state having a predetermined angle. , The flow direction of the gas g is a direction from the gas inflow path 1A toward the side where the slide valve G ′ takes the closed posture in the gas outflow path 1B.
Since the slide valve G is configured by the first valve body G1 and the second valve body G2 as in the first embodiment, the detailed description of the configuration is omitted.
In the third embodiment, the tapered portion G1a of the first valve body G1 is seated, and the reverse tapered portion 30 as a seating guide portion that guides the movement of the first valve body G1 includes a closed posture and an open posture of the first valve body G1. In order to appropriately guide the movement between the two, the gas outflow passage 1B is provided on the downstream side of the connection portion with the gas inflow passage 1A.
The upstream end of the first valve body G1 is provided with an extending portion 40 extending toward the gas inflow passage 1A, and the extending portion 40 is in a closed posture of the first valve body G1 (FIG. 12). The posture H3b of the excessive outflow prevention mechanism H provided in the gas inflow path 1A is pressed when the posture is changed between the posture shown in FIG. 13 and the opening posture (posture shown in FIG. 13). .

[Another embodiment]
(1) In the first embodiment, the pressing member R2 is integrally formed with the slide valve G. However, the pressing member R2 is configured by a member different from the pressing member R2, and the pressing member and the other member are configured. It can also be connected to be movable in the axial direction of the gas plug body 2 integrally.

(2) In the first embodiment, the oscillating member R1 is formed in an L shape. However, the shape of the oscillating member R1 is not limited to the L shape, and other various shapes are applicable. be able to.

(3) In the first embodiment, the overflow prevention mechanism H includes the operated member H3 separately from the overflow prevention valve H2. For example, when the overflow prevention valve H2 moves to the operating position. In addition, the shaft portion of the overflow prevention valve H2 protrudes to the downstream side of the gas flow passage 1, and the shaft portion of the overflow prevention valve H2 that protrudes is used as the operated portion with respect to the shaft portion of the overflow prevention valve H2. It is also possible to perform a reset operation.

(4) In the first embodiment, the central axis is the same for all of the plurality of flow path portions constituting the gas flow passage 1, and the gas flow passage 1 is provided in a straight line. For example, FIG. As shown, the flow path part (first flow path part 1a to second flow path part 1b) constituting the upstream part of the gas flow path 1 and the flow path part (first flow path part constituting the downstream part of the gas flow path 1) It is also possible to form a linear gas flow passage 1 having a center axis shifted in the radial direction of the flow path with the three flow path parts 1c to the sixth flow path part 1f).
Thus, providing the gas flow passage 1 in a straight line along the axial direction of the gas plug body 2 is not limited to a straight line as in the first embodiment, but as shown in FIG. What is comprised from the flow-path part shifted in the direction shall also be included. 4, as in the first embodiment, the gas stopper main body 2 itself can be provided in a straight line, and the gas stopper main body 2 can be configured compactly.

(5) In the first to third embodiments, the slide valve G has the tapered portion Ga, and the seating guide for guiding and guiding the tapered portion Ga on the inner peripheral surface of the gas plug main body 2. The example in which the reverse taper-shaped part 30 was provided as a part was shown.
Hereinafter, although not included in the scope of rights of the present application, a configuration according to a reference form of the gas plug of the present application will be exemplified.
As a reference form, as shown in FIGS. 14 and 15, the slide valve G is configured by a first valve body G1 and a second valve body G2, and the first valve body G1 has a cylindrical portion Gc, and is cylindrical. In the gas stopper main body 2 in which the outer peripheral surface of the shape portion Gc forms the fourth flow path portion 1d (an example of the closed posture side gas flow passage portion) of the gas flow passage 1 in the closed posture (posture shown in FIG. 14). while seated on the peripheral surface, open at the position (position shown in FIG. 15), it is configured to be positioned in the third channel region 1c of larger diameter than the fourth channel region 1d (an example of the posture side gas flow path region opening) Can be mentioned .
In this configuration, the inner peripheral surface of the gas stopper main body 2 that forms the fourth flow path portion 1d (an example of the closed posture side gas flow passage portion) serves as a seating guide portion.

(6) In 1st-3rd embodiment, the seating guide part formed in the inner peripheral surface of the gas stopper main body 2 has the whole outer peripheral surface of the taper-shaped part G1a of the 1st valve body G1 of the slide valve G. The shape of the contact shape is shown.
Hereinafter, although not included in the scope of rights of the present application, as a reference form of the gas stopper of the present application, the seating guide portion is a part of the outer peripheral surface of the tapered portion G1a of the first valve body G1 of the slide valve G. The thing of the shape which contact | abuts is illustrated. With this configuration , the movement of the slide valve G between the opening posture and the closing posture can be appropriately guided.
Specifically, as a reference form, as shown in FIG. 16A, in a cross-sectional view along the axis of the gas stopper main body 2, the third flow path portion 1 c of the gas stopper main body 2 and the smaller diameter of the third flow path portion 1 c. The structure which makes the corner | angular part formed in the inner periphery of the gas stopper main body 2 between 4 flow-path parts 1d a seating guide part is mentioned .
Further, as a reference form, as shown in FIG. 16 (b), the third flow path portion 1c of the gas plug main body 2 and the fourth flow path having a smaller diameter in the cross-sectional view along the axis of the gas plug main body 2 are used. The structure which makes the seating guide part the reverse taper-shaped part which is formed in the inner periphery of the gas stopper main body 2 between the site | parts 1d, and contact | abuts a part of outer peripheral surface of the taper-shaped part G1a of the 1st valve body G1 is mentioned. .
Further, as a reference form, as shown in FIG. 16C, the third flow path portion 1 c of the gas plug main body 2 and the fourth flow path having a smaller diameter than that of the gas plug main body 2 in a cross-sectional view along the axis of the gas plug main body 2. The structure which makes the chamfering part which has the predetermined curvature formed in the inner periphery of the gas stopper main body 2 between the site | parts 1d into a seating guide part is mentioned .

(7) In the first to third embodiments, the seat portion G1a of the first valve body G1 of the slide valve G is a reverse-tapered seating guide portion formed on the inner peripheral surface of the gas plug body 2. An example in which the entire outer peripheral surface is a tapered shape is shown.
Hereinafter, although not included in the scope of rights of the present application, a reference form of the gas stopper of the present application is illustrated.
If the shape of the other reference form of the 1st valve body G1 is illustrated, the seating part G1a of the 1st valve body G1 of the slide valve G will follow the axial center of the gas stopper main body 2, as shown to Fig.17 (a). In a cross-sectional view, there is a shape that abuts with a reverse tapered seating guide portion of the gas plug main body 2 with a point instead of a surface. In this case, the three-dimensional shape of the seating portion G1a is a flat cylindrical shape.
As another reference form, as shown in FIG. 17B , the seating portion G1a of the first valve body G1 of the slide valve G has a gas flow direction in a cross-sectional view along the axis of the gas plug body 2. in addition include a configuration for the tapered portion formed in a part of the downstream side, as another reference embodiment, as shown in FIG. 17 (c), seat of the first valve body G1 of the slide valve G G1a has a configuration in which a part of the downstream side in the gas flow direction is a chamfered portion having a predetermined curvature in a cross-sectional view along the axis of the gas plug body 2.

  The present invention is capable of smoothly moving the slide valve between the closed posture and the open posture while adopting a relatively simple configuration and appropriately closing the gas flow passage. It can be effectively used as a stopper.

1: Gas flow path 1A: Gas inflow path 1B: Gas outflow path 2: Gas stopper body 3: Gas outlet 7: Pressing member 30: Reverse taper shape part 100: Gas connector G: Slide valve G1a: Taper shape part G1b : Shaft

Claims (5)

A closed position for closing the gas flow passage and a gas flow passage which is movable in a direction along a gas flow direction in a part of the gas flow passage to a cylindrical gas stopper body in which the gas flow passage is formed. In a gas stopper equipped with a slide valve whose posture can be freely changed between the opening posture to open the
On the inner peripheral surface of the gas stopper main body, the outer peripheral surface of the slide valve is seated in the closed posture of the slide valve, and in the posture change between the open posture and the closed posture of the slide valve, A seating guide for guiding the slide valve so that the axis of the slide valve matches the axis of the gas flow path ;
The slide valve has a tapered body having a tapered shape on an outer peripheral surface thereof, and has a valve body that closes or opens the gas flow passage at an upstream portion in the gas flow direction,
The tapered portion is integrally formed with the valve body,
A closed posture side gas in which the valve body is a gas flow passage portion on the side in which the valve body takes the closed posture is a flow path diameter of the gas flow passage portion on the side in which the valve body takes the open posture. It is configured to be larger than the flow path diameter of the flow path part,
The seating guide portion is provided in the closed posture side gas flow path portion,
The gas stopper main body includes a valve seat portion having a reverse taper shape in which the taper-shaped portion is seated on an inner peripheral surface of the slide valve in the closed posture.
A gas stopper in which the valve seat portion serves as the seating guide portion . The gas plug according to claim 1, wherein the gas flow passage is configured in a straight line along a moving direction between the closing posture and the opening posture of the slide valve . The gas flow passage is connected to a first linear portion along a moving direction between the closing posture and the opening posture of the slide valve, and a state having a predetermined angle with the first linear portion. A second linear portion;
The gas flow direction is a direction from the side of the first linear portion where the slide valve takes the closing posture toward the second linear portion,
2. The gas stopper according to claim 1, wherein the seating guide portion is provided on an upstream side of a connection portion between the first linear portion and the second linear portion . The gas flow passage is connected to a first linear portion along a moving direction between the closing posture and the opening posture of the slide valve, and a state having a predetermined angle with the first linear portion. A second linear portion;
The gas flow direction is a direction from the side of the second linear portion toward the side of the first linear portion where the slide valve takes the closing posture,
2. The gas stopper according to claim 1, wherein the seating guide portion is provided on a downstream side of a connection portion between the first linear portion and the second linear portion . An overflow prevention valve for preventing excessive outflow of gas upstream of the slide valve in the gas flow direction of the gas flow passage;
A reset operation that is arranged between the slide valve and the overflow prevention valve in the gas flow direction and resets the overflow prevention valve by movement of the slide valve between the closed position and the open position; The gas stopper according to any one of claims 1 to 4, further comprising a resetting unit for performing the resetting .

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