JP5894746B2 - Gas stopper - Google Patents

Description

  The present invention relates to a gas stopper in which a valve body moves linearly.

  Generally, this type of gas stopper has a stopper body and a valve body. A gas passage is formed in the stopper body. The gas passage has an upstream inflow hole through which gas is supplied and a downstream outflow hole through which the gas flows out. The downstream end of the inflow hole is open to the inner peripheral surface of the outflow hole. On the other hand, the valve body is provided in the outflow hole so as to be slidable between a closed position and an open position. When the valve body moves to the closed position, the opening on the inner peripheral surface of the outflow hole on the downstream side of the inflow hole is closed, and the gas plug is closed. When the valve body moves to the open position, the opening on the downstream side of the inflow hole is opened, and the gas stopper is opened.

  A plug portion is formed on the outer surface of the plug body where the outflow hole opens. When a socket is connected to the plug portion, a push rod provided on the socket enters the outflow hole and moves the valve body from the closed position to the open position. As a result, the gas stopper is opened, and the gas supplied to the inflow hole is supplied to the gas appliance through the outflow hole, the socket, and the gas pipe connected to the socket. On the other hand, when the socket is removed from the plug portion, the valve body is returned from the open position to the closed position by the return spring. As a result, the gas stopper is automatically switched from the open state to the closed state.

  The valve body blocks the gas flow by covering the opening of the inflow hole. Therefore, the outer peripheral surface of the valve body needs to be in close contact with the inner peripheral surface of the outflow hole. Therefore, in the gas stopper described in Patent Document 1 below, a C-shaped valve body is used. The C-shaped valve body can be elastically expanded and contracted, and is inserted into the outflow hole in a contracted state. Therefore, the outer peripheral surface of the valve body is in close contact with the inner peripheral surface of the outflow hole by its own elasticity. Thereby, the airtightness between the outer peripheral surface of a valve body and the inner peripheral surface of an outflow hole is ensured.

Japanese Utility Model Publication No. 2-77367

The valve body has a constant-thickness type whose thickness is constant over the entire length in the circumferential direction, and the thickness of the part facing the open part is the thickest, and gradually increases from there to both ends adjacent to the open part. There is a thickness change type. Gas plugs using each type of valve have the following problems.
That is, in the constant-thickness type valve body, when the diameter is reduced, the portion facing the open portion is most greatly deformed to have an elliptical cross section or an oval shape. For this reason, in the gas stopper using the constant thickness type valve body, a part of the outer peripheral surface of the valve body is separated from the inner peripheral surface of the outflow hole having a circular cross section. As a result, it is difficult for the valve body to reliably shield the opening of the inflow hole, and the sealing performance may be deteriorated.
On the other hand, the variable thickness type valve element is deformed substantially the same when the diameter is reduced, so that the shape can be maintained in a circular cross section before and after the diameter expansion and contraction. Therefore, the problem of deterioration in sealing performance does not occur. However, it is very difficult to accurately manufacture a variable thickness type valve element whose thickness changes along the circumferential direction. For this reason, the gas stopper using the variable thickness type valve element has a problem that the manufacturing cost increases.

In order to solve the above problems, the present invention provides a plug body in which a gas passage having an upstream inflow hole and a downstream outflow hole is formed, and a valve slidably provided in the outflow hole. A downstream end of the inflow hole is opened on the inner peripheral surface of the outflow hole, the opening is opened and closed by the valve body, and the outer peripheral surface of the valve body is the valve body itself. In the gas stopper pressed and brought into contact with the inner peripheral surface of the outflow hole due to the elasticity of the valve body, the valve body has a main body portion with a circular cross-section mounting portion formed on the outer peripheral surface, and the outflow into the mounting portion of the main body portion. A metal plate member that is provided so as to be immovable in the longitudinal direction of the hole and that opens and closes the opening portion of the inflow hole on the inner peripheral surface of the outflow hole, and the valve portion has a certain thickness. Is wound around the outer peripheral surface of the mounting portion in a state of being elastically deformed, and the above The outer peripheral surface of the portion is slidably pressed into contact with the inner peripheral surface of the outflow hole by its own elasticity, and the opening of the inflow hole at least on the inner peripheral surface of the outflow hole of the plate member constituting the valve portion A range wider than the portion facing the portion is formed as a flat plate portion.
In this case, the flat plate portion has a length of a semicircle or more in terms of the circumferential length of the outflow hole, and the longitudinal center of the flat plate portion is the inflow on the inner peripheral surface of the outflow hole. It is desirable to match with the center of the opening of the hole.
It is desirable that the outer diameter of the main body is set to be substantially the same as a value obtained by subtracting twice the thickness of the plate material constituting the valve portion from the inner diameter of the outflow hole.
The plug body is made of metal, a resin cylinder is provided in the outflow hole, and a space between the outer peripheral surface of the cylinder and the inner peripheral surface of the outflow hole is hermetically sealed. A communication hole that penetrates from the outer peripheral surface to the inner peripheral surface, communicates the inflow hole with the inside of the cylindrical body, and flows gas into the cylindrical body from the inflow hole, The inside of the cylinder is a part of the outflow hole, the communication hole is an opening of the inflow hole on the inner peripheral surface of the inflow hole, and the valve body is slid on the inner peripheral surface of the cylinder. It is desirable that the opening is opened and closed by the valve body on the inner peripheral surface of the cylindrical body.

  According to the present invention having the above-described characteristic configuration, the valve body is constituted by a main body portion in which a mounting portion having a circular cross section is formed, and a valve portion made of a metal plate wound around the mounting portion of the main body portion. Therefore, there is no manufacturing difficulty in manufacturing a C-shaped valve body whose thickness changes in the circumferential direction. Accordingly, the valve body can be manufactured at low cost, and the gas stopper can be manufactured at low cost. Moreover, since the valve part is comprised by winding a board | plate material around a main-body part, a valve part becomes circular. Therefore, it is possible to reliably avoid a situation where the sealing performance is deteriorated.

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention in a state where a main valve is located at a closed position. FIG. 2 is a longitudinal sectional view showing the same embodiment with the main valve positioned at the open position. FIG. 3 is an enlarged cross-sectional view showing a main part of FIG. 4 is a cross-sectional view taken along line XX in FIG. FIG. 5 is a cross-sectional view taken along line YY of FIG. FIG. 6 is an exploded perspective view of the same embodiment. FIG. 7 is a perspective view of the main body and the plate material used in the embodiment. FIG. 8 is a perspective view of the main body and the plate shown in a state where the plate is elastically curved. FIG. 9 is a perspective view showing a valve body used in the embodiment. It is a front view which shows the other example of the board | plate material used as a valve part of the valve body which concerns on this invention. FIG. 11 is a sectional view similar to FIG. 3 showing a second embodiment of the present invention. 12 is a cross-sectional view taken along line XX of FIG. 13 is a cross-sectional view taken along line YY in FIG. 11 of the sub-valve used in the same embodiment.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 9 show a first embodiment of the present invention. The gas stopper A of this embodiment includes a stopper body 1, a main valve body (valve body) 2, and a sub-valve body 3 as main components.

  The stopper body 1 is made of a metal such as brass, and a gas passage 11 is formed in the stopper body 1. The gas passage 11 has an inflow hole 12 and an outflow hole 13. One end of the inflow hole 12 is open to the outer surface (the lower surface in FIG. 1) of the plug body 1. The other end of the inflow hole 12 extends toward the inside of the plug body 1. The outflow hole 13 extends in a direction intersecting with the inflow hole 12. In particular, in this embodiment, it extends in the orthogonal direction.

One end and the other end of the outflow hole 13 are respectively opened on the outer surface of the plug body 1 (the right end surface and the left end surface in FIG. 1). One end opening of the outflow hole 13 is sealed by a lid 4 screwed and fixed to the opening. The lid 4 is covered with a decorative sheet 4A so that it cannot be seen from the outside. Thereby, the aesthetics of the gas stopper A are improved.

The other end portion (upper end portion in FIG. 1) of the inflow hole 12 is opened on the inner peripheral surface of the outflow hole 13 on the end portion (downstream end portion) side closed by the lid body 4. Therefore, the inflow hole 12 and the outflow hole 13 are communicated with each other through the opening 12 a of the inflow hole 12 on the inner peripheral surface of the outflow hole 13.

  A tubular joint 5 is rotatably and airtightly fitted to the outer surface of the plug body 1 where one end of the inflow hole 12 opens. A tapered female thread portion 51 is formed on the inner peripheral surface of the joint 5. A primary gas pipe (not shown) is screwed and fixed to the taper female thread portion 51. Gas is supplied from the primary gas pipe to one end (upstream end) of the inflow hole 12. The gas supplied to the inflow hole 12 flows into the outflow hole 13 through the opening 12a. The plug body 1 may be provided with a joint to which a flexible gas pipe is connected instead of the joint 5. Alternatively, a gas pipe may be directly connected to one end opening of the inflow hole 12.

  A plug portion 14 is formed on the outer surface portion of the plug body 1 where the other end portion (left end portion in FIG. 1) of the outflow hole 13 opens. The plug portion 14 has a size and a shape defined by Japanese Industrial Standard (JIS S2120). A socket S is detachably connected to the plug portion 14. When the socket S is connected to the plug portion 14, the gas supplied from the primary side gas pipe to the inflow hole 12 flows into the socket S through the outflow hole 13, and the secondary side gas pipe connected to the socket S It is supplied to a gas appliance (not shown) via (not shown). Instead of the plug portion 14, a connection portion for connecting the secondary side gas pipe and having another shape and structure may be provided on the outer surface portion of the plug body 1 where the outflow hole 13 opens. Good.

  An overflow prevention valve mechanism 6 is provided inside the inflow hole 12. The overflow prevention valve mechanism 6 closes the inflow hole 12 when the flow rate of the gas flowing through the inflow hole 12 exceeds a predetermined flow rate. The overflow prevention valve mechanism 6 has a well-known structure, and therefore a detailed description thereof is omitted. A reset member 61 is provided inside the inflow hole 12 and downstream of the excessive outflow prevention valve mechanism 6. The reset member 61 is for resetting the overflow prevention valve mechanism 6 in a state where the inflow hole 12 is closed and returning the overflow prevention valve mechanism 6 to the state in which the inflow hole 12 is opened. Operated by the main valve body 2.

  The main valve body 2 is provided at the upstream end of the outflow hole 13 where the lid body 4 is provided. The main valve body 2 is movable between the closed position shown in FIG. 1 and the open position shown in FIG. 2, and is urged from the open position to the closed position by the first and second valve springs 7A and 7B. ing. When the main valve body 2 is located at the closed position, the opening 12 a of the inflow hole 12 is closed by the main valve body 2. As a result, the inflow hole 12 and the outflow hole 13 are blocked, and the gas stopper A is closed. When the main valve body 2 moves to the open position, the opening 12a of the inflow hole 12 is opened. As a result, the inflow hole 12 and the outflow hole 13 communicate with each other, and the gas stopper A is opened.

  It is assumed that the overflow prevention valve mechanism 6 closes the inflow hole 12 when the main valve body 2 is located at the open position. In this state, the reset member 61 is moved to the outflow hole 13 side by the reset spring 62, and a part of the reset member 61 enters the outflow hole 13. When the main valve body 2 moves from the open position toward the closed position, the reset member 61 is moved toward the inflow hole 12 by the main valve body 2 against the urging force of the reset spring 62. When the main valve body 2 moves to the closed position, and thereby the reset member 61 is moved to a predetermined position, the overflow prevention valve mechanism 6 is reset.

  A sub-valve element 3 is accommodated in a portion of the inside of the outflow hole 13 on the downstream side of the main valve element 2. The sub-valve element 3 is provided on the inner peripheral surface of the outflow hole 13 so as to be slidable in the longitudinal direction. The upstream end of the sub-valve element 3 is in contact with the downstream end of the main valve element 2. Accordingly, the auxiliary valve body 3 is urged to the downstream side of the outflow hole 13 via the main valve body 2 by the first and second valve springs 7A and 7B.

A valve portion 31 is provided at the end of the sub-valve element 3 located on the downstream side of the outflow hole 13. When the socket S is not connected to the plug portion 14, the valve portion 31 is seated on the valve seat 13a formed at the downstream end of the outflow hole 13 by the first and second valve springs 7A and 7B. ing. When the valve portion 31 is seated on the valve seat 13 a, the main valve body 2 and the sub valve body 3 can no longer move to the downstream side of the outflow hole 13. The position of the main valve body 2 at this time is a closed position. Therefore, when the main valve body 2 is in the closed position, the space between the inflow hole 12 and the outflow hole 13 is closed by the main valve body 2 and the outflow hole 13 is closed by the sub valve body 3. The gas stopper A is kept closed with high airtightness.

On the other hand, when the socket S is connected to the plug portion 14, the push rod Sa provided in the socket S hits the sub valve body 3, and the sub valve body 3 is moved upstream of the outflow hole 13 as shown in FIG. The main valve body 2 is moved by a predetermined distance from the closed position while being moved away from the valve seat 13a. The position of the main valve body 3 at this time is an open position. Therefore, when the socket S is connected to the plug portion 14, the space between the inflow hole 12 and the outflow hole 13 is opened, the outflow hole 13 is opened, and the gas plug A is opened. Therefore, gas is supplied from the outflow hole 13 to the gas appliance via the socket S and the secondary gas pipe.

When the socket S is removed from the plug portion 14, the main valve body 3 is moved from the open position to the closed position, and the sub valve body 3 is seated on the valve seat 13a. As a result, the gas stopper A is automatically switched to the closed state.

A third valve spring 7 </ b> C is provided between the main valve body 2 and the sub valve body 3. The sub valve body 3 is biased to the downstream side of the outflow hole 13 by the third valve spring 7C, while the main valve body 2 is biased to the upstream side. However, the biasing force of the third valve spring 7C is weaker than the biasing force of the first valve spring 7A. Therefore, the main valve body 2 and the sub-valve body 3 behave together as long as the main valve body 2 moves normally. However, when the main valve body 2 is stopped at an open position or a position between the open position and the closed position for any reason, the sub-valve element 3 is downstream of the outflow hole 13 by the third valve spring 7C. Moved to the side and seated on the valve seat 13a. As a result, gas leakage is prevented from occurring even when the main valve body 2 stops.

  The main valve body 2 has a main body portion 2A and a valve portion 2B, particularly as shown in FIGS. The main body 2A has a cylindrical shape and is accommodated in the outflow hole 13 so as to be movable in the longitudinal direction. A guide groove 21 extending in the longitudinal direction is formed in the peripheral wall portion of the main body 2A. In this guide groove 21, a sphere 8 provided immovably on the inner peripheral surface of the outflow hole 13 is relatively movable in the longitudinal direction of the guide groove 21, and the width direction of the guide groove 21 (the circumferential direction of the main body 2 </ b> A). ) Is immovably inserted. Accordingly, the main body 2A moves only in the longitudinal direction of the outflow hole 13 without rotating in the circumferential direction.

  A notch 22 is formed in the peripheral wall of the main body 2A. The notch 22 is disposed at an end located on the downstream side of the outflow hole 13 in the peripheral wall. Moreover, the notch 22 is arranged so as to face the opening 12a when the main valve body 2 is located at the open position. Therefore, when the main valve body 2 is located at the open position, the gas in the inflow hole 12 enters the main valve body 2 through the opening 12a and the notch 22, and the main body portion of the outflow hole 13 from there. It flows into the portion downstream of 2A (the left portion in FIG. 1).

  A partition wall 23 is formed in the main body 2A. By the partition wall 23, the inside of the main body 2A is divided into a part located on the upstream side of the outflow hole 13 and a part located on the downstream side. In addition, the partition wall 23 is disposed adjacent to the notch 22 on the downstream side of the outflow hole 13. Therefore, the gas that has entered the notch 22 through the opening 12a flows into only the portion of the main body 2A downstream of the partition wall 23 and does not flow into the upstream portion. The partition wall 23 is urged to the downstream side of the outflow hole 13 by the first and second valve springs 7A and 7B.

  A mounting portion 24 is formed on the outer peripheral surface of the main body portion 2A. The mounting portion 24 has a circular cross section, and is disposed concentrically with the other portions of the main body portion 2A. The mounting portion 24 is configured by a circular arc surface that is continuous in the circumferential direction and the axial direction except for a portion where the guide groove 21 is formed. The mounting portion 24 does not necessarily have to be continuous in the circumferential direction and the axial direction. When the plate material 2C described later is wound around the mounting portion 24, the mounting portion 24 is circumferential in the range in which the plate material 2C can be circular. It may be intermittent or may be intermittent in the axial direction.

  An engagement groove 25 is formed in an annular shape on the outer peripheral surface of the main body 2A. The engaging groove 25 is disposed adjacent to one end of the mounting portion 24, that is, the end of the mounting portion 24 located on the downstream side of the outflow hole 13. The engagement groove 25 may be disposed adjacent to the other end of the mounting portion 24. Further, the engagement groove 25 may be formed with a predetermined length in the circumferential direction without being formed in an annular shape.

  The valve portion 2B is configured by winding the plate material 2C around the mounting portion 24. The plate material 2C is made of a metal flat plate having elasticity such as stainless steel, and has a constant thickness throughout the plate material 2C. Both end portions of the plate portion 2C, that is, both end portions in the circumferential direction of the valve portion 2B are separated from each other in the circumferential direction by substantially the same distance as the width of the guide groove 21 (width in the circumferential direction of the outflow hole 13). 21 are located at substantially the same position as the both sides in the width direction. Therefore, both end portions in the circumferential direction of the valve portion 2B are in contact with the sphere 8. Accordingly, the valve portion 2B is allowed to move only in the longitudinal direction of the outflow hole 13, and is prevented from rotating in the circumferential direction of the main body portion 2A.

  The plate member 2C constituting the valve portion 2B is wound around the mounting portion 24 in a state where it does not undergo plastic deformation, that is, within the range of elastic deformation. Therefore, the valve portion 2B tries to expand its diameter by its own elasticity, and the outer peripheral surface of the valve portion 2B is pressed against the inner peripheral surface of the outflow hole 13 by the elastic force of the valve portion 2B. Moreover, the outer diameter of the valve portion 2B is larger than the other part of the main valve body 2. Therefore, only the valve portion 2 </ b> B of the main valve body 2 slides on the inner peripheral surface of the outflow hole 13.

  The valve portion 2 </ b> B has the same axial length as the mounting portion 24. That is, the length of the valve portion 2B in the axial direction is the same as the length between the notch portion 22 and the engagement groove 25. Moreover, the valve portion 2B is arranged so that both end portions in the axial direction are located at the same position in the axial direction as both end portions of the mounting portion 24. Therefore, when the main valve body 2 is located at the closed position, the valve portion 2B closes the opening 12a and closes the gas stopper A. On the other hand, when the main valve body 2 is located at the open position, the valve portion 2B is spaced from the opening 12a toward the lid 4 and opens the opening 12a. Thereby, the gas stopper A will be in an open state.

  An engaging claw 26 is formed at one end of the valve portion 2B in the axial direction (longitudinal direction of the outflow hole 13). The engaging claw 26 is inserted into the engaging groove 25 so as not to move in the longitudinal direction of the outflow hole 13. Thus, the valve portion 2B is mounted on the mounting portion 24 so as not to move in the longitudinal direction of the outflow hole 13.

  The outer diameter of the mounting portion 24 is set to be approximately the same as the value obtained by subtracting twice the thickness of the plate 2C from the inner diameter of the outflow hole 13. Here, “substantially the same size” means a size that satisfies the following condition. That is, when the outer diameter of the mounting portion 24 is made equal to the value obtained by subtracting twice the thickness of the plate 2C from the inner diameter of the outflow hole 13, the valve portion 2B mounted on the mounting portion 24 slides in the outflow hole 13. It is almost impossible to move. Therefore, the outer diameter of the mounting portion 24 is slightly smaller than the value obtained by subtracting twice the thickness of the plate 2C from the inner diameter of the outflow hole 13 so that the valve portion 2B can slide in the outflow hole 13. Set to On the other hand, when the outer diameter of the mounting portion 24 is excessively small, the inner peripheral surface of the valve portion 2B and the outer peripheral surface of the mounting portion 24 when the diameter of the valve portion 2B increases until it contacts the inner peripheral surface of the outflow hole 13. A large gap is generated between the valve portion 2B and the valve portion 2B does not have a circular cross section, but has a cross-sectional elliptical or oval shape. Then, as described above, the sealing performance of the main valve body 2 with respect to the opening 12a may be deteriorated. Therefore, the outer diameter of the mounting portion 24 is obtained by subtracting twice the thickness of the plate member 2C from the inner diameter of the outflow hole 13 within a range where no problem occurs in the sealing performance even if the valve portion 2B has an elliptical cross section. It is set to a dimension smaller than the value. That is, the outer diameter of the mounting portion 24 is close to a value obtained by subtracting twice the thickness of the plate member 2C from the inner diameter of the outflow hole 13 in a range in which the valve portion 2B can slide in the outflow hole 13. Is set.

  More specifically, the outer diameter of the mounting portion 24 varies depending on the inner diameter of the outflow hole 13, but the inner diameter of the outflow hole 13 is D, the outer diameter d of the mounting portion 24, and the plate material 2C. The outer diameter d of the mounting portion 24 is set to a value smaller by 0.02 to 0.5 mm than (D-2T). The thickness T of the plate material 2C is set to 0.02 to 0.1 mm. The outer diameter d of the mounting portion 24 and the thickness T of the plate material 2C are preferably determined based on experiments.

  In the gas stopper A having the above-described configuration, the valve portion 2B of the main valve body 2 is configured by winding a metal plate 2C around the mounting portion 24 having a circular cross section. It does not become circular and maintains a substantially circular cross section. Therefore, it can prevent that the reliability of the seal with respect to the opening part 12a of the valve part 2B falls. Further, the main valve body 2 is constituted by a main body 2A having a mounting section 24 having a circular cross section and a plate material 2C wound around the mounting section 24, and the plate material 2C has a certain thickness. The main valve body 2 can be easily manufactured as compared with the case where a valve body having a C-shaped cross section and the thickness changes in the circumferential direction, and the manufacturing cost of the main valve body 2 can be reduced. it can. As a result, the manufacturing cost of the gas stopper A can be reduced.

  Next, another embodiment of the present invention will be described. In the embodiment described below, only the configuration different from the above-described embodiment will be described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  FIG. 10 shows another example of the plate material used in the gas stopper A of the present invention. In the plate member 2D of this embodiment, the entire plate member 2C of the above embodiment is formed in a flat plate shape, whereas only the intermediate portion in the longitudinal direction (circumferential direction when it becomes the valve portion 2B). A flat plate portion 27 is provided, and both end portions are inclined portions 28 and 28 inclined with respect to the flat plate portion 27 by the same angle. The length L of the flat plate portion 27 is at least longer than the dimension of the opening 12a in the longitudinal direction of the outflow hole 13, and in this example, is longer than 3/4 of the circumference of the outflow hole 13. Half of the value obtained by subtracting the length of the flat plate portion 27 from the total length of the plate material 2D is the length of the inclined portion 28. The inclination angle of the inclined portion 28 is shown to be larger than the actual inclination angle in FIG. 10 for convenience of explanation, but is about 1 to 2 °.

  The plate member 2D having such a configuration is wound around the mounting portion 24 such that the inclined portion 28 is positioned inside the circle. Since the valve portion 2B configured by winding in this way has both circumferential end portions directed radially inward with respect to the circle, the contact pressure of each portion of the valve portion 2B with respect to the inner peripheral surface of the outflow hole 13 Can be reduced. That is, when the whole is flat like the plate material 2C of the above embodiment, both end portions in the circumferential direction of the valve portion 2B are in press contact with the inner peripheral surface of the outflow hole 13 with a larger contact pressure than the intermediate portion in the circumferential direction. To do. However, in the valve portion 2B configured by the plate material 2D of this example, both end portions in the circumferential direction are configured to go radially inward, so both end portions of the valve portion 2B with respect to the inner peripheral surface of the outflow hole 13 The contact pressure can be reduced. As a result, the difference in the contact pressure of each part of the valve part 2B with respect to the inner peripheral surface of the outflow hole 13 can be reduced.

  In addition, about the inclination part 28 of board | plate material 2D, you may form instead the curved part curved in the circular arc shape. In this case, the curved portion is formed such that the radius of curvature of the outer peripheral surface thereof is set to be slightly larger than the radius of the outflow hole 13, and the base end portion is smoothly connected to the flat plate portion 27 without a step.

  11 to 13 show a second embodiment of a gas plug according to the present invention. In the gas stopper B of this embodiment, the cylindrical body 9 is fitted into the outflow hole 13 concentrically. The cylinder 9 is formed by molding a relatively hard resin, and is formed as a cylinder having a constant inner diameter. One end portion of the cylindrical body 9 located on the downstream side of the outflow hole 13 is pressed against an annular step surface 13 b formed on the inner peripheral surface of the outflow hole 13, and the other end surface is downstream of the outflow hole 13 by the lid body 4. Has been pressed. Thereby, the cylinder 9 is provided in the outflow hole 13 so as not to move in the longitudinal direction. A protrusion 91 is formed on the outer peripheral surface of the cylindrical body 9. The protrusion 91 is disposed at a position 180 degrees away from the opening 12a of the inflow hole 12 in the circumferential direction. The protrusion 91 is inserted into the key groove 13 c formed on the inner peripheral surface of the outflow hole 13, thereby preventing the cylindrical body 9 from rotating. In this way, the cylindrical body 9 is fixed in the outflow hole 13. In addition, between the outer peripheral surface of the cylinder 9 and the inner peripheral surface of the outflow hole 13, it is airtightly sealed by seal members S1, S2 such as O-rings.

  A communication hole (opening portion of the inflow hole) 92 penetrating from the outer peripheral surface to the inner peripheral surface is formed in the peripheral wall portion of the cylindrical body 9. The communication hole 92 has the same shape and dimension as the opening 12 a of the inflow hole 12. Moreover, the communication hole 92 is disposed at the same position as the opening 12 a in the longitudinal direction and the circumferential direction of the outflow hole 13. Therefore, the gas in the inflow hole 12 enters the inside of the cylindrical body 9 from the opening 12a through the communication hole 92, and further, from the inside of the cylindrical body 9 to the downstream portion of the outflow hole 13 from the cylindrical body 9. Inflow. As is clear from this, in this embodiment, the inside of the cylindrical body 9 constitutes a portion on the upstream side of the outflow hole 13. Therefore, the communication hole 92 that opens to the inner peripheral surface of the cylindrical body 9 is substantially an opening portion of the inflow hole 12 that opens to the inner peripheral surface of the outflow hole 13. One end portion of the reset member 61 located on the downstream side of the inflow hole 12 is inserted into the communication hole 92 so as to be movable in the longitudinal direction of the inflow hole 12.

  The main valve body 2 is slidably provided on the inner peripheral surface of the cylindrical body 9. The main body 2A of the main valve body 2 has a shape in which a portion located in front of the partition wall 23 is deleted from the main body 2A of the above embodiment toward the downstream side of the outflow hole 13. In the guide groove 21 of the main body 2 </ b> A, a ridge 93 formed on the inner peripheral surface of the cylindrical body 9 is inserted so as to be movable relative to the spherical body 8. A valve portion 2B is slidably inserted in the inner peripheral surface of the cylindrical body 9.

  The auxiliary valve body 3 has a shaft portion 32. One end of the shaft 32 (the end on the downstream side of the outflow hole 13) abuts against the partition wall 23 of the main body 2A. A valve portion 31 is provided integrally with the other end portion of the shaft portion 32. A plurality of arm portions 33 are integrally provided at an intermediate portion of the shaft portion 32, and a guide ring portion 34 disposed concentrically with the shaft portion 32 is integrally provided at the distal end portion of each arm portion 33. Yes. The guide ring portion 34 is slidably inserted into the inner peripheral surface of the cylindrical body 9. A guide groove 34 a is formed in the guide ring portion 34. By inserting the ridge 93 into the guide groove 34a so as to be relatively movable, the sub-valve element 3 is supported by the cylinder body 9 so as to be movable in the longitudinal direction and non-rotatable.

  According to the gas plug B of this embodiment, in addition to the effects of the gas plug A of the above embodiment, the plug body 1A can be manufactured at low cost, and as a result, the gas plug B can be manufactured at low cost. An effect is obtained. That is, in the case of the first embodiment in which the main valve body 2 is directly fitted into the outflow hole 13 of the metallic plug body 1, the gap between the inner peripheral surface of the outflow hole 13 and the outer peripheral surface of the valve portion 2B. In order to prevent gas from leaking out, it is necessary to process the outflow hole 13 with high accuracy, particularly with high surface roughness. As a result, there is a problem that the manufacturing cost of the plug body 1 is increased, and as a result, the manufacturing cost of the gas plug A is increased. On the other hand, according to this gas stopper B, the main valve body 2 is slidably provided on the cylinder 9, and the cylinder 9 is formed by molding a resin. The surface roughness of the inner peripheral surface of the cylindrical body 9 can be made highly accurate only by molding. Therefore, the plug body 1A can be manufactured at low cost, and the gas plug B can be manufactured at low cost.

In addition, this invention is not limited to said embodiment, A various modification is employable in the range which does not deviate from the summary.
For example, in the above-described embodiment, the present invention is applied to the gas stoppers A and B having the auxiliary valve body 3, but the present invention is also applicable to a gas stopper without the auxiliary valve body 3. is there.
Further, in the case where the cylindrical body 9 is provided in the outflow hole 13, the cylindrical body 9 may be made of metal if strength is more important than manufacturing cost.

A gas stopper B gas stopper 1 stopper body 1A stopper body 2A body portion 2B valve portion 2C plate material 2D plate material 9 cylinder 11 gas passage 12 inflow hole 12a opening portion 13 outflow hole 24 mounting portion 27 flat plate portion 92 communication hole

Claims (5)

A plug body in which a gas passage having an upstream inflow hole and a downstream outflow hole is formed, a valve body slidably provided in the outflow hole, and the gas outflow downstream of the valve body A sub-valve element that is slidably provided in the hole and that sits on or separates from a valve seat formed at the downstream end of the outflow hole to open and close the outflow hole. The end is opened to the inner peripheral surface of the outflow hole, the opening is opened and closed by the valve body, and the outer peripheral surface of the valve body is pressed against the inner peripheral surface of the outflow hole by the elasticity of the valve body itself In the gas stopper that is contacted and the opening and closing of the outflow hole by the sub valve body and the opening and closing of the inflow hole by the valve body are performed synchronously,
The valve body is provided on the outer peripheral surface of the main body portion having a circular cross-section mounting portion, and provided on the mounting portion of the main body portion so as not to move in the longitudinal direction of the outflow hole. A valve portion for opening and closing the opening of the inflow hole,
When the sub-valve body directly contacts the downstream end surface of the main body of the valve body, the outflow hole and the inflow hole are synchronously opened and closed,
It said valve portion is the mounting section outer peripheral surface depending on the metal plate member wound in a state of being elastically deformed to the configuration of which has a constant thickness, the elasticity of the outer circumferential surface itself of the valve portion Is slidably pressed against the inner peripheral surface of the outflow hole,
A gas stopper, characterized in that the plate member constituting the valve portion is formed as a flat plate portion in a wider range than at least a portion facing the opening portion of the inflow hole on the inner peripheral surface of the outflow hole.   The flat plate portion has a length of a semicircle or more in terms of the circumferential length of the outflow hole, and the center of the flat plate portion in the longitudinal direction is the opening of the inflow hole on the inner peripheral surface of the outflow hole. The gas stopper according to claim 1, wherein the gas stopper is aligned with a center of the portion.   The outer diameter of the main body portion is set to be substantially the same as a value obtained by subtracting twice the thickness of the plate material constituting the valve portion from the inner diameter of the outflow hole. Gas stopper as described.   The gas plug according to any one of claims 1 to 3, wherein the plate material has the flat plate portion in the middle in the longitudinal direction, and both end portions of the plate material are inclined with respect to the flat plate portion. . A stopper body having a gas passage having an inflow hole on the upstream side and an outflow hole on the downstream side formed therein; and a valve body slidably provided in the outflow hole; and a downstream end of the inflow hole The opening is opened on the inner peripheral surface of the outflow hole, the opening is opened and closed by the valve body, and the outer peripheral surface of the valve body is pressed against the inner peripheral surface of the outflow hole by the elasticity of the valve body itself. In the gas tap
The valve body is provided on the outer peripheral surface of the main body portion having a circular cross-section mounting portion, and provided on the mounting portion of the main body portion so as not to move in the longitudinal direction of the outflow hole. A valve portion for opening and closing the opening of the inflow hole,
It said valve portion is the mounting section outer peripheral surface depending on the metal plate member wound in a state of being elastically deformed to the configuration of which has a constant thickness, the elasticity of the outer circumferential surface itself of the valve portion Is slidably pressed against the inner peripheral surface of the outflow hole,
The plate member constituting the valve portion is formed as a flat plate portion having a flat area wider than at least the portion facing the opening portion of the inflow hole on the inner peripheral surface of the outflow hole,
The plug body is made of metal, a resin cylinder is provided in the outflow hole, and a space between the outer peripheral surface of the cylinder and the inner peripheral surface of the outflow hole is hermetically sealed. A communication hole that penetrates from the outer peripheral surface to the inner peripheral surface, communicates the inflow hole with the inside of the cylindrical body, and flows gas into the cylindrical body from the inflow hole, The inside of the cylinder is a part of the outflow hole, the communication hole is an opening of the inflow hole in the inner peripheral surface of the cylinder, and the valve body slides on the inner peripheral surface of the cylinder. A gas stopper, which is provided so as to be movable and opens and closes the opening of the communication hole on the inner peripheral surface of the cylindrical body by the valve body.

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