JP3031826B2 - Gas tap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stopper incorporating a valve which opens only when the stopper is located at an almost open position.

[0002]

2. Description of the Related Art A conventional gas valve is provided with a safety valve for preventing gas leakage by shutting off a passage in the gas valve when, for example, a gas pipe connecting a gas valve and a gas device is disconnected. There is something. However, the safety valve does not operate unless the flow rate of the gas flowing through the gas stopper is in an overflow state that is larger than that during normal use. For this reason, when the gas pipe comes off when the gas stopper is in the half-open state, the safety valve does not operate and the gas continues to leak.

Therefore, in recent gas stoppers, another valve body is incorporated in addition to the safety valve (see Japanese Utility Model Publication No. 4-43650 and Japanese Utility Model Application Laid-Open Publication No. Hei 4-30370). The valve is opened only when the plug of the gas plug is located at the substantially open position. Therefore, it is possible to prevent the gas from continuing to leak even if the gas pipe is disconnected at the half-open time when the safety valve does not operate.

The valve is opened and closed by a valve operating member in response to an opening and closing operation of the plug. That is,
The valve operating member is disposed in a vertical hole formed in the plug, and is urged by an operation spring from the opening side of the vertical hole to the back side. However, when the stopper is located at the closed position, the engagement convex portion formed on the valve operating member engages with the engagement surface formed on the stopper, thereby moving the vertical hole to the far side. Has been blocked. However, when the plug is rotated from the closed position to the substantially open position, the engaging protrusion enters the engaging recess formed in the plug and can move in the same direction. As a result,
The valve operating member is moved in the same direction by the operating spring. At this time, the valve body is locked by the valve operating member and moves together with the valve operating member. Thereby, the valve body opens.

On the other hand, when the plug is rotated from the open position to the closed position, the valve operating member rotates together with the plug because the engaging projection of the valve operating member is inserted into the engaging recess. . When the valve operating member rotates slightly, the lock between the valve operating member and the valve body is released, and the valve body is moved by the valve spring toward the opening of the vertical hole to close the valve. When the plug is further closed and rotated, the valve operating member is moved by the cam mechanism against the biasing force of the operating spring. Then, when the stopper is turned to the almost closed position, the engagement protrusion comes out of the engagement recess, and the valve operating member is turned by the valve spring in a state where the engagement protrusion contacts the engagement surface. Return to the original position.

Here, in the gas plugs described in the above two publications, the engaging recess and the engaging surface are formed on the plug, but there are also those in which these are formed on the plug main body (Japanese Utility Model Publication No. 61-31).
No. 250). However, when the engaging concave portion and the engaging surface are formed in the plug main body, a part of the valve operating member must be protruded from the vertical hole of the plug body, and the entire gas plug becomes correspondingly large. . In this regard, in the case where the engaging recess and the engaging surface are formed in the plug body as in the above two publications, almost the entire valve operating member can be housed in the vertical hole, and thereby the gas The plug can be downsized.

[0007]

Problems to be Solved by the Invention
In the gas stopper described in Japanese Patent Application Laid-Open Publication No. H11-115, the engaging recess is formed on the bottom surface of the vertical hole of the stopper. In this case, if the plug is cast, the engaging recess can be formed relatively easily. However, when the plug is made of brass, casting cannot be performed, and the engaging recess must be cut. This cutting is a very difficult operation because the engaging recess is located at the back of the vertical hole. For this reason, there is a problem that a great amount of time is required for the production and the production cost rises.

In the gas plug described in Japanese Utility Model Publication No. 4-43650, a ring member is integrally connected to an end of the plug body, and an engagement recess is formed on the inner peripheral surface of the ring member. is there. In this case, the engaging recess can be cut relatively easily, but there is a certain limit in reducing the manufacturing time and the manufacturing cost in terms of metal cutting. In addition, there is a problem that the entire length of the plug is increased by the amount of connection of the ring members, and as a result, the size of the gas plug is increased.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. A plug having a vertical hole is rotatably provided inside the plug, and a support cylinder has one end. The valve body is fixed in a state where the portion is inserted into the vertical hole, and a valve body that opens and closes one end opening of the support cylinder by being brought into contact with and separated from one end surface of the support cylinder inside the vertical hole is provided. Between the inner peripheral surface of the hole and the outer peripheral surface of the support cylinder, the valve moves with the valve from the one end opening side to the other end side of the vertical hole only when the plug is located at the substantially open position. A valve operating member for opening the valve body is provided so as to be movable in the axial direction of the vertical hole and rotatably in the circumferential direction, and to an inner peripheral portion of the vertical hole, an outer peripheral portion of the valve operating member. The engaging projection formed on the vertical hole is movable in the axial direction of the vertical hole and is not movable in the circumferential direction of the vertical hole. A part is formed, and is engaged with one end of the plug body in the circumferential direction from the engaging concave portion, and the engaging convex portion is engaged with the vertical hole so as to be immovable in the axial direction and movably in the circumferential direction. In the gas stopper having a mating surface, a cylindrical body formed of resin is fitted and fixed in the vertical hole, and the engaging recess and the engaging surface are formed in the cylindrical body. In this case, for the reason described later, it is desirable to form a through hole that forms the engaging recess with the inner peripheral surface of the vertical hole in the cylindrical body. In addition, a slit extending in the circumferential direction from the engagement recess is formed at one end of the cylindrical body located on the opening side of the vertical hole, and the side surface of the slit located on the other end side of the plug body is It is desirable to have an engagement surface. Further, it is desirable to form a protrusion on the outer peripheral surface of one end of the cylindrical body for positioning the cylindrical body with respect to the plug by abutting against one end of the plug.

[0010]

The engagement recess and the engagement surface can be formed simultaneously with the formation of the cylindrical body. Moreover, since it is only necessary to fit and fix the cylindrical body into the vertical hole of the plug, the manufacturing time can be shortened and the manufacturing cost can be reduced. Also,
Since the cylindrical body is fitted in the vertical hole, the overall length of the plug does not increase, and therefore, it is possible to prevent the gas plug from increasing in size.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, the gas plug 1 includes a plug body 2, a plug 3, a support cylinder 4, a valve 5,
The valve operating member 6 and the cylinder 7 are main components.

As shown in FIG. 4, inside the plug main body 2,
An inflow port 21, an outflow port 22, and a storage hole 23 are formed. The storage hole 23 extends downward from the upper end surface of the plug main body 2, and has an inlet hole 21 opened on the inner peripheral surface at the lower end thereof, and an outlet 22 opened on the inner peripheral surface of the intermediate portion. The portion of the storage hole 23 where the outflow hole 22 opens is a tapered hole 23a. The storage hole 2 slightly below the tapered hole 23a.
An annular mounting surface 23b facing upward is formed on the inner peripheral surface of 3. The outlet 22 on the outer surface of the plug body 2
The plug of the quick joint is screwed and fixed to the opening.

As shown in FIG. 5, the plug 3 has a tapered main body 31 corresponding to the tapered hole 23a. Inside the main body portion 31, a vertical hole 32 having a circular cross section extending upward from the lower end surface thereof along the axis is formed, and a horizontal hole 33 extending from the inner peripheral surface to the outer peripheral surface of the intermediate portion of the vertical hole 32 is formed. Have been. The vertical hole 32 has a large-diameter hole 32a at the upper end and a small-diameter hole 32b at the lower end. A step surface 32c is formed between the large-diameter hole 32a and the small-diameter hole 32b. ing.

The plug 3 constructed as described above is rotatably inserted into the tapered hole 23a, and is rotated by a handle 81 via an intermediate member 82 as shown in FIGS. It is supposed to be. In this case, the rotation range of the plug 3 is restricted between the open position where the axis of the horizontal hole 33 coincides with the axis of the outlet 22 and the closed position where the horizontal hole 33 is substantially 90 ° away from the outlet 22. Have been. Of course, at the open position, the inflow port 21 and the outflow port 22 communicate with each other via the vertical hole 32 and the horizontal hole 33, and at the closed position, are blocked by the plug 3 between the inflow port 21 and the outflow port 22.

As shown in FIG. 6, the support cylinder 4 has a cylindrical shape, and has a small-diameter portion 41 at the upper end and a large-diameter portion 42 at the lower end. An annular protrusion 43 is formed at the upper end of the large diameter portion 42, and an annular groove 43 a is formed on the outer peripheral surface of the annular protrusion 43. An O-ring 83 (see FIGS. 1 to 3) is mounted on the annular protrusion 43a. And the support cylinder 4 has its annular projection 8
The plug 3 is fitted to the inner peripheral surface of the storage hole 23 in a state where it is mounted on the mounting surface 23b, and the plug is hermetically sealed with the inner peripheral surface of the storage hole 23 by the O-ring 83. It is fixed to the main body 2. Therefore, the gas flowing from the inflow port 21 flows into the vertical hole 32 through the inside of the support cylinder 4.

At the lower end of the support cylinder 4, a wire 84 (see FIGS. 1 to 3) is disposed so as to cross the inside thereof, and a ball valve (safety valve) 85 is mounted on the wire 84. Have been. When the flow rate of the gas flowing inside the support cylinder 4 becomes excessive, the ball valve 85 floats against its own weight by the pressure of the gas, and is formed at an intermediate portion of the inner peripheral surface of the support cylinder 4. The person sits on the valve seat 44. Thereby, the inside of the support cylinder 4 is shut off.

In this embodiment, a ball valve 85 is used as a safety valve which is seated and moved against its own weight by the pressure of gas. However, another known safety valve, for example, a valve urged upstream by a spring. A body may be used. In this way, the gas plug 1 can be used with its upside down.

As shown in FIG. 7, the valve element 5 has a disk-shaped head 51. This head 51 is shown in FIGS.
As shown in FIG. 3, it is arranged in a vertical hole 32 above the support cylinder 4, and its lower end has an annular shape made of rubber or the like having excellent sealing properties as shown in FIG. 7 (D). A seal member 86 is mounted and fixed. Then, the seal member 86 abuts on the upper end surface of the support cylinder 4 serving as the valve seat surface 45, thereby closing the upper end opening of the support cylinder 4 and moving upward from the valve seat surface 45 to close the upper end of the support cylinder 4. The upper end opening is opened.

The lower end of the head 51 is provided with a pair of legs 5.
2, 52 are formed. Each leg 52 is formed on the inner peripheral surface of the upper end of the support cylinder 4 and extends in the vertical direction.
The valve element 5 is inserted into the support tube 4 so as to be movable in the up and down direction and in the circumferential direction by being inserted between the support tube 4 and the support tube 4 so as to be movable in the up and down direction and not in the circumferential direction. It is linked to impossible. The lower ends of the legs 52, 52 are connected and reinforced by a connecting shaft 53, and a projecting portion 54 projecting downward is formed at the center of the connecting shaft 53. When the head portion 51 is seated on the valve seat surface 45, the projecting portion 54 hits the ball valve 5 seated on the valve seat 44, thereby pushing down the ball valve 5 biting on the valve seat 44.

The valve operating member 6 is, as shown in FIG.
It has a cylindrical portion 61 having a cylindrical shape, and a bottom portion 62 formed at the upper end of the cylindrical portion 61. The cylindrical portion 61 is provided with the vertical hole 32.
Is inserted movably in the axial direction of the vertical hole 32 and rotatably in the circumferential direction between the inner peripheral surface of the support cylinder 4 and the outer peripheral surface of the small diameter portion 41 of the support cylinder 4. On the other hand, the bottom 62 is disposed above the head 51 of the valve body 5 so as to face the head 51, and a valve spring 87 is disposed in a compressed state between the bottom 62 and the head 51. I have. This valve spring 87 causes the head 5
1 can be seated on the valve seat surface 45.

The upper end of the valve spring 87 is non-rotatably connected to the valve operating member 6 by being inserted between a pair of projections 63 formed on the bottom 62. The lower end is formed of a pair of protrusions 5 formed on the head 51.
By being inserted between 5, 55, it is non-rotatably connected to the valve body 5. Therefore, the valve operating member 6 is
, The valve spring 87 is twisted, and as a result, the valve operating member 6 is urged to turn in the direction opposite to the turning direction.

A window hole 64 is formed in the peripheral wall of the cylindrical portion 61 of the valve operating member 6 so as to pass therethrough. A locking projection 65 is formed on the upper part of one side surface of the window hole 64. A locking projection 56 formed on the outer peripheral surface of the head 51 of the valve element 5 enters the window hole 64. Here, when the plug 3 is located at the open position, the locking projection 56 of the valve element 5 is located above the locking projection 65. In addition, the valve operating member 6 is constantly urged upward by an operating spring 88 disposed between the lower end surface and the annular projecting portion 43 of the support cylinder 4. Therefore, when the valve operation member 6 moves upward by the urging force of the operation spring 88, the valve body 5
Moves upward together with the valve operating member 6. by this,
When the plug 3 is located at the open position, the valve 5 opens.

A cam surface 66 is provided on the other side of the window hole 64.
Are formed in the window hole 64.
The protrusion 47 formed on the outer peripheral surface of the upper end of the first member 1 enters. Here, when the plug 3 rotates from the open position to the closed position, the valve operating member 6 rotates integrally with the plug 3, and the valve operating member 6 moves from the open position side. When rotated to the closed position side, the projection 47 abuts on the cam surface 66. The cam operation of the cam surface 66 and the projection 47 allows the valve operating member 6 to move downward with the closing rotation of the plug 3.

As shown in FIG. 9, the cylindrical body 7 is formed by molding a resin or the like into a cylindrical shape, and has an outer diameter substantially equal to the inner diameter of the small-diameter hole portion 32b of the vertical hole 32. I have. A projecting portion 71 forming a part of a circle is provided at the upper end of the outer peripheral surface of the cylindrical body 7.
Is formed, and an annular protruding portion 72 is formed at a lower end portion. The cylindrical body 7 is inserted into the small diameter portion 32b of the vertical hole 32, and is fixed by means such as adhesion. In this case, the cylinder 7 is inserted until the annular projection 72 abuts on the lower end surface of the plug 3, and the projection 71 is
Is fitted to the lower inner peripheral surface, whereby positioning in the axial direction and the circumferential direction with respect to the plug 3 is performed. Moreover, the annular projecting portion 72 and the projecting portion 71 sandwich the lower end surface of the plug 3 and the inner peripheral surface of the lateral hole 33, thereby fixing the cylinder 7 to the stopper 3, so that the cylindrical body 7 is fixed. 7 does not necessarily need to be adhered to the plug 3. However, it is desirable to adhere to increase the fixing strength. Also,
In the case of bonding, the projections 71 and 72 connect the cylinder 7 to the plug 3
Is temporarily fixed to the cylindrical body 7 until the adhesive is solidified.
Does not need to be fixed to the plug 3 using fixing means, and the bonding operation can be performed easily by that much.

When the cylindrical body 7 is inserted into the small diameter portion 32b, the cylindrical body 7 is inserted by an amount corresponding to the radial projection of the projection 71.
Need to be elastically deformed. Therefore, in the cylindrical body 7, a pair of slits 73, 73 are formed on both sides in the circumferential direction of the protruding portion 71, and a pair of slits 74, 74 are provided at a position approximately 90 ° away from the protruding portion 71 in the circumferential direction.
Is formed, whereby the cylindrical body 7 can be easily elastically deformed. Of course, only one pair of slits 73, 73 (74, 74) may be formed, and the other slits 74, 74 (73, 73) may be formed as necessary.

In the peripheral wall portion of the cylindrical body 7, through holes 75, 75 penetrating therethrough are formed so as to be 180 ° apart in the circumferential direction. In the through hole 75, while the stopper 3 rotates from the open position to the substantially closed position, the engaging convex portion 67 formed on the outer peripheral surface of the lower end portion of the valve operating member 6 is movable in the vertical direction. And it is inserted so that it cannot move in the circumferential direction. Therefore, when the plug is located in the above range, the valve operating member 6 is connected to the plug 3
Are connected so as to be vertically movable and non-rotatable.

Each of the through holes 7 is provided at the lower end of the cylindrical body 7.
Slits (slit grooves) extending from the lower end portions of the plugs 5 and 75 in the circumferential direction (the direction from the closed position side to the open position side of the plug 3).
76, 76 are formed. The upper side surface of the slit 76 is an engagement surface 76a, on which the valve operating member 6 moves downward until the engagement protrusion 67 reaches the lower end of the through hole 75. When pivoted in the opening direction,
The engaging projection 67 is configured to abut. In this state, the valve operating member 6 is connected to the stopper 3 so as to be rotatable and immovable upward.

The projection 72 of the cylinder 7 is provided with a through hole 75.
The inner peripheral portion of the portion facing the slit 76 is cut off to form a thin portion 72b, and the inner diameter of the thin portion 72b is the same as the outer diameter of the cylindrical body 7. Then, the engaging protrusion 67 is passed through the space between the thin portions 72b and 72b, and
5 can be inserted. Of course, when the engaging convex portion 67 comes out of the through hole 75 and moves in the circumferential direction, the inner peripheral side portion of the thin portion 72b moves.
Grooves 68, 68 extending vertically are formed on the inner peripheral surface corresponding to the engagement protrusions 67, 67 of the valve operating member 6. The projections 47, 47 and the two locking projections 56 of the valve body 5,
56 are substantially the same as the outer diameters of the respective bridges. Also,
The groove 68 is provided with a minute projection 69 whose height increases from the lower end to the upper end. Accordingly, the projection 47 and the locking projection 56 move over the minute projection 69 while elastically deforming the valve operating member 6, thereby forming the groove 68.
Can enter the window hole 64 from the
Is prevented from passing through the groove 68 by the minute projection 69.

In the gas plug 1 having the above configuration, it is assumed that the plug 3 is now located at the open position as shown in FIG.
At this time, the valve body 5 is opened by the valve operating member 6. In this state, when the plug 3 is turned to the closed position side, the engagement convex portion 67 of the valve operating member 6 enters the through hole 75 of the cylinder 7, so that the valve operating member 6 is
It rotates with it. When the valve operating member 6 rotates slightly, the locking projection 65 of the valve operating member 6 is separated from the engaging projection 56 of the valve body 5 in the circumferential direction. As a result, the valve element 5 is moved downward by the valve spring 87 and seats on the valve seat surface 45, thereby blocking the upper end opening of the support cylinder 4 (see FIG. 2).

When the stopper 3 is further turned to the closed position,
The cam surface 66 of the valve operating member 6 abuts on the projection 47 of the support cylinder 4. Therefore, the valve operation member 6 is moved downward against the urging force of the operation spring 88. At this time, the rotation of the valve operating member 6 causes the valve spring 87 to be twisted,
The valve spring 87 urges the valve operating member 6 toward the open position. When the plug 3 is turned to the closed position, the engaging projection 67 reaches the lower end of the through hole 75, and its upper surface is substantially flush with the engaging surface 76a of the slit 76. As a result, the engaging projection 67 can move along the slit 76, and the valve operating member 6 is rotated to the initial position when opened by the rotational urging force of the valve spring 87. This state is the closed state shown in FIG. 1, and the valve operating member 6 is connected to the stopper 3 so as to be immovable upward and rotatable by the engagement between the engagement surface 76a and the engagement protrusion 67. Have been.

On the other hand, when the plug 3 located at the closed position is turned to the open position, the valve operating member 6 is stopped at a fixed position, and only the plug 3 turns. When the plug 3 reaches the open position, the engaging projection 67 enters the through hole 75. As a result, the valve operating member 6 can be moved upward, and is moved upward by the operating spring 88 until it comes into contact with the upper side surface of the through hole 75. At this time, the valve operating member 6
Of the valve body 5 moves upward together with the valve operating member 6. As a result, the valve element 5 opens, and the valve element 5 is brought into the open state shown in FIG.

Here, in the gas stopper 1 described above, the through-hole 75 functioning as an engagement recess is formed in the cylinder 7 which is separate from the stopper 3, and the engagement surface 76a is formed. In addition, there is no need to form an engagement recess and an engagement surface in the plug 3, and it is sufficient to simply fit and fix the cylinder 7 to the vertical hole 32 of the plug 3. Moreover, since the cylindrical body 7 is a resin molded product, it can be manufactured much easier and in a shorter time than metal processing. Therefore, the labor and cost of manufacturing the gas stopper 1 can be reduced.

Further, since the cylindrical body 7 is inserted into the vertical hole 32 of the plug 3, the length of the plug 3 does not increase.
Therefore, it is possible to prevent the gas stopper 1 from becoming large.

The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, in the above-described embodiment, the through hole 75 is formed, but a concave portion (engaging concave portion) extending vertically may be formed on the inner peripheral surface of the cylindrical body 7 instead. However, when the cylindrical body 7 is formed of resin, forming the through-holes 75 not only makes the actual forming easier than forming the concave portions, but also makes it possible to manufacture a mold at low cost. This is the same for the slit 76. That is, instead of the slit 76, a groove (slit groove) extending in the circumferential direction may be formed on the inner peripheral surface of the cylindrical body 7, but it is more preferable to form the slit 76.
Further, the lower end surface of the cylindrical body 7 may be used as the engagement surface without forming the slit 76.

[0035]

As described above, according to the first aspect of the present invention, since the cylindrical body having the engaging concave portion and the engaging surface is fitted and fixed to the vertical hole of the plug body, The manufacturing cost of the plug can be reduced. Further, since the length of the plug does not increase, it is possible to prevent the gas plug from becoming large. According to the second aspect of the present invention, since the through-hole is formed in the cylindrical body to form the engagement recess, the cylindrical body can be easily formed at low cost. Similarly,
According to the third aspect of the invention, the cylindrical body can be easily formed at low cost. According to the invention of claim 4,
By contacting the protruding portion with the end face of the plug, the fitting depth of the cylinder to the vertical hole of the plug can be made constant.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a longitudinal sectional view showing a state when a stopper is turned to a closed position.

FIG. 2 is a partially omitted longitudinal sectional view showing a state when the plug of the embodiment is slightly rotated from an open position to a closed position.

FIG. 3 is a partially omitted longitudinal sectional view showing a state when the plug of the embodiment is rotated to an open position.

FIG. 4 is a longitudinal sectional view showing the plug main body of the embodiment.

FIG. 5 shows the plug of the embodiment, and FIG. 5 (A)
5B is a front view, and FIG. 5B is a cross-sectional view taken along the line BB of FIG. 5A.

FIG. 6 shows a cylindrical body of the embodiment, and FIG. 6 (A)
Is a plan view thereof, FIG. 6B is a side view thereof, FIG.
(D) is a cross-sectional view of CC and DD of FIG. 6 (A), respectively.
FIG. 6E is an enlarged view as viewed from an arrow E in FIG. 6B.

FIG. 7 shows a valve element of the embodiment, and FIG. 7 (A)
7 (B) is a side view, FIG. 7 (C) is a front view thereof, FIG. 7 (D) is a sectional view taken along line DD of FIG. 7 (A), and FIG.
(E) is a view on arrow E in FIG. 7 (C).

8 shows a valve operating member of the embodiment, and FIG.
8A is a plan view, FIG. 8B is a front view, FIG.
(C) and (D) are respectively CC and DD of FIG.
FIG. 8E is a cross-sectional view taken along the arrow E in FIG. 8B.

FIG. 9 shows a cylindrical body of the embodiment, and FIG. 9 (A)
9B is a plan view thereof, FIG. 9B is a side view thereof, FIG. 9C is a front view thereof, and FIGS. 9D and 9E are respectively FIG. 9A.
9D is a sectional view taken along line DD and EE, and FIG.
It is an arrow view.

FIG. 10 is an exploded perspective view showing a plug, a support cylinder, a valve body, a valve operation member, a cylinder, a valve spring, and an operation spring of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas plug 2 Plug main body 3 Plug body 4 Support cylinder 5 Valve body 6 Valve operation member 7 Cylindrical body 21 Inflow port 22 Outflow port 23 Insertion hole 32 Vertical hole 33 Horizontal hole 47 Projection 56 Locking protrusion 65 Locking protrusion 66 Cam surface 75 through hole 76 slit 76a engagement surface 87 valve spring 88 operation spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 63-18683 (JP, U) JP-A 4-30370 (JP, U) JP-A 58-189867 (JP, U) JP-A 2- 60778 (JP, U) JP-A 62-18475 (JP, U) JP-A 63-59279 (JP, U) JP 4-9494 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 17/18-31/34

Claims (4)

(57) [Claims] 1. A plug having a vertical hole is rotatably provided inside the plug, and a support cylinder is fixed with one end inserted into the vertical hole, and the support cylinder is fixed inside the vertical hole. A valve body that opens and closes one end opening of the support cylinder by being brought into contact with and separated from one end face of the support cylinder is provided, and the plug body is provided between an inner peripheral surface of the vertical hole and an outer peripheral surface of the support cylinder. The valve operating member that moves from the one end opening side of the vertical hole to the other end side with the valve element and opens the valve element only when the is located at the substantially open position is in the axial direction of the vertical hole. Movable, and provided so as to be rotatable in the circumferential direction, an engagement convex portion formed on the inner peripheral portion of the vertical hole on the outer peripheral portion of the valve operating member is movable in the axial direction of the vertical hole, and An engagement recess is formed to engage with the vertical hole so as to be immovable in the circumferential direction. The stopper extends at one end of the plug from the engagement recess in the circumferential direction. In a gas stopper having an engagement surface in which the engagement protrusion is not movable in the axial direction of the vertical hole and is movably engaged in the circumferential direction, a cylinder formed by molding a resin in the vertical hole is provided. A gas stopper, wherein the gasket is fitted and fixed, and the engagement recess and the engagement surface are formed in the cylindrical body. 2. The gas stopper according to claim 1, wherein the cylindrical body is formed with a through hole that forms the engaging recess with the inner peripheral surface of the vertical hole. 3. A slit extending in the circumferential direction from the engagement recess is formed at one end of the cylindrical body located on the opening side of the vertical hole, and a slit is formed on the other end of the cylindrical body. The gas plug according to claim 1, wherein a side surface is the engagement surface. 4. A projection formed on an outer peripheral surface of one end of the cylindrical body for positioning the cylindrical body with respect to the stopper by abutting against one end of the stopper. The gas stopper according to any one of claims 1 to 3.