JP2560352Y2 - Gas cock - 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 cock incorporating a gas leakage prevention valve which opens only when it is almost open.

[0002]

2. Description of the Related Art Generally, a gas cock has a cock body having an inlet and an outlet, and a vertical hole rotatably provided inside the cock body and extending along one axis from one end face on the inlet side. A plug having a horizontal hole extending from the vertical hole to the outer peripheral surface, and when the plug is rotated to the open position, the inlet and the outlet communicate with each other through the vertical hole and the horizontal hole. When rotated to the closed position, the inlet and the inlet are shut off by the plug.

In the case where a gas pipe comes off from a gas cock due to an accident, for example, a large amount of gas may leak from the gas cock and cause a serious accident such as a fire. Therefore, a conventional gas cock is provided with an overflow prevention valve that closes when the flow rate of gas flowing in the gas cock becomes excessive. However, the overflow prevention valve does not operate unless the gas flow rate becomes excessive. For this reason, when the gas pipe comes off when the gas cock is used in the half-open state, the gas continues to flow out.

Therefore, recent gas cocks are provided with a gas leakage prevention valve. As a gas cock provided with such a gas leakage prevention valve, for example, there is a gas cock described in Japanese Utility Model Laid-Open No. 63-18683. The gas leakage prevention valve of the gas cock is provided inside the cock main body with a distal end inserted into the vertical hole of the plug, and communicates with the inflow port and the vertical hole. A valve body that opens and closes a portion, and an operating member that opens the valve body only when the stopper is in the substantially open position. The valve body is a cylindrical body except when the stopper is in the substantially open position. The tip opening is closed. Therefore, even if an accident that the gas pipe comes off when the plug is at the half-open position occurs, it is possible to prevent gas from leaking.

[0005]

The gas cock described in the above publication has a problem that the number of parts increases or the diameter of the plug increases. That is, due to the structure of the gas leakage prevention valve, when the stopper is rotated from the open position to the closed position, the operation member rotates integrally with the stopper, and when the stopper is rotated in the opposite direction, the operation member operates. The member must be stopped. Therefore, in the above-described gas cock, a stopper ring is provided separately from one end of the stopper body, and an engagement groove extending in the axial direction is formed on the inner peripheral surface of the stopper ring, while the outer periphery of the operating member is formed. The engagement groove is formed on the surface so that the engagement groove is detachably engaged with the engagement groove. However, when such a locking ring is provided, there is a problem that the number of parts increases by that much and the structure becomes complicated. Therefore, it is conceivable to directly form the engaging groove on the inner peripheral surface of the vertical hole of the plug. However, in this case, it is necessary to increase the thickness of the plug by an amount corresponding to the formation of the engaging groove. As a result, there is a problem that the diameter of the plug increases.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the invention according to claim 1 comprises a cock body having an inlet and an outlet, a vertical hole extending from one end face along the axis, and A stopper having a horizontal hole extending from the vertical hole to the outer peripheral surface, the stopper being rotatably provided between an open position and a closed position inside the cock main body; A cylindrical body fixed in a state inserted into the hole and communicating with the inflow port and the vertical hole through the inside thereof, provided in the vertical hole so as to be movable in the axial direction thereof, and abutting against a tip end surface of the cylindrical body. A valve element for closing the opening of the distal end of the cylindrical body, and a valve body rotatably provided inside the vertical hole of the plug body and movable in the axial direction of the plug body, wherein the plug body is located at the substantially open position. Operating member that separates the valve body from the distal end surface of the cylinder only when And a gas leak prevention valve which, in between the plug body and the operating member, the engagement mechanism for rotating with the operation member with the rotation of the plug is engaged detachably provided,
Between the operating member and the tubular body, move the operating member toward one end surface of the plug so that the engagement mechanism is released when the plug is rotated to the substantially closed position. In the gas cock provided with a cam mechanism for moving the engaging mechanism, the engaging mechanism is configured such that the engaging recess is formed on a bottom surface of a vertical hole of the plug and an upper end of the operating member, and the engaging recess is formed on the operating member. And an engaging portion that is non-rotatably and removably engageable. In this case, the operating member is urged toward the bottom of the vertical hole by the male member, and the engaging portion abuts against the bottom surface of the vertical hole when the engaging portion escapes from the engaging concave portion. It is desirable.

[0007]

Since the engagement recess is formed on the bottom surface of the vertical hole of the plug, it is not necessary to increase the diameter of the plug. Further, when the engaging portion is made to abut against the bottom surface of the vertical hole, the length of the plug can be minimized.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, the schematic configuration of the entire gas cock will be briefly described. As shown in FIGS. 1 to 3, a plug 3 is rotatably arranged inside the cock body 1. The plug 3 is provided with a handle 10
1 (refer to FIG. 4) allows the user to rotate by approximately 90 ° from the open position shown in FIG. 1 to the closed position shown in FIG. In the open state, the valve body 6 of the gas leakage prevention valve 10 is separated upward from the cylinder 4 together with the operation member 7 by the first spring 8 (elastic member), and the upper end opening of the cylinder 4 is opened. ing. Therefore, the gas flowing in from the inflow port 12 passes through the inside of the cylindrical body 4 and flows out from the outflow port 13. In this open state, when the gas flow rate becomes excessive, the ball valve 5 is floated by the gas and seated on the valve seat 44. Thus, the overflow state is instantaneously eliminated.

When the stopper 3 is slightly rotated in the direction of the arrow from the open position to the closed position, as shown in FIG.
Is moved downward by the urging force of the second spring 9 and abuts on the cylindrical body 4 to block the upper end opening. Therefore, an accident that the gas continues to leak without operating the ball valve 5 when the valve is half-opened is prevented.

Next, the specific structure of each part of the gas cock will be described in detail with reference to FIGS. 1 to 3 and other drawings. As shown in FIG. 5, the cock main body 1 has an inverted Z-shape, and has a tapered hole-shaped plug storage hole 11 extending downward from the upper end surface thereof. An inlet 12 is provided at the bottom of the stopper housing hole 11.
Is opened. A gas pipe (both not shown) connected to a main plug is connected to an opening outside the inflow port 12. In addition, an outflow hole 13 is opened in the inner peripheral surface of the middle portion of the stopper housing hole 11.
As shown in FIG. 2, a hose end 100 is rotatably provided at an opening outside the outlet 13.
It should be noted that a gas pipe (both not shown) connected to a gas appliance is connected to the hose end 100.

A key groove 14 extending vertically along the inner peripheral surface is formed on the inner peripheral surface of the plug housing hole 11, and an annular concave portion 15 is formed on the bottom surface of the plug housing hole 11. ing. On the inner peripheral surface of the concave portion 15, two flat portions 16 are formed 180 ° apart in the circumferential direction.

The rubber packing 2 is inserted into the plug housing hole 11. As shown in FIG. 6, the rubber packing 2 has a cylindrical shape, and is formed in a tapered shape corresponding to the stopper housing hole 11. And rubber packing 2
Is inserted into the plug housing hole 11 with the key portion 21 formed on the outer peripheral surface thereof fitted in the key groove 14. In this case, when the rubber packing 2 is inserted until the rubber packing 2 comes into contact with the bottom surface of the plug housing hole 11, the rubber packing 2 comes into press contact with the inner peripheral surface of the plug housing hole 11 due to its own elasticity. Airtightness between the surface and the outer peripheral surface of the rubber packing 2 is ensured. In addition, rubber packing 2
In the state where the outlet 1 is inserted into the stopper housing hole 11,
A through-hole 22 is formed in a portion facing 3, and a protruding portion 23 is formed in an annular shape on the inner peripheral surface of the lower end.

A stopper 3 is rotatably and airtightly fitted on the inner peripheral surface of the rubber packing 2. As shown in FIG. 7, the plug 3 has a tapered main body 31 corresponding to the inner peripheral surface of the rubber packing 2, and a lower portion facing the inflow port 12 is provided inside the main body 31. A vertical hole 32 extending upward from the end face is formed, and a horizontal hole 33 extending laterally from the vertical hole 32 and opening to the outer peripheral surface is formed. In the upper bottom surface of the vertical hole 32, an engagement recess 32a is provided.
Are formed. The horizontal hole 33 is located at the same position in the vertical direction as the through hole 22 when the plug 3 is inserted until it comes into contact with the protrusion 23 of the rubber packing 2. Therefore, the horizontal hole 33 is switched between a communicating state facing the outlet 13 through the through hole 22 and a blocking state separated from the through hole 22 depending on the rotation position of the plug 3.

The plug 3 is held by the handle 101
A position where the facing area between the lateral hole 33 and the through hole 22 is maximum (hereinafter referred to as an open position), and a position where the lateral hole 33 and the through hole 22 are turned off by 90 ° from the open position to be in a blocking state (Hereinafter, referred to as a closed position).

The cylinder 4 of the gas leakage prevention valve 10 is inserted into and fixed to the bottom of the plug housing hole 11. The cylindrical body 4 is made of a resin having appropriate rigidity and flexibility, such as polyacetal, and has a large-diameter portion 41 at the lower end and a small-diameter portion 42 at the upper end, as shown in FIG. . An annular projection 43 is formed between the large diameter portion 41 and the small diameter portion 42. A flat surface 43a is formed on the outer peripheral surface of the annular projecting portion 43 so as to be 180 ° apart in the circumferential direction.

The annular projection 43 is fitted into the recess 15 with the flat surface 43a of the cylinder 4 facing the flat portion 16 of the cock body 1.
1 non-rotatably inserted. Moreover, the annular projection 4
Reference numeral 3 is equal to or slightly thicker than the depth of the recess 15. Therefore, when the plug 3 is inserted into the upper surface of the annular projecting portion 43 until it comes into contact with the projecting portion 23 of the rubber packing 2, the lower end surface of the rubber packing 2 abuts. It is fixed airtight. As a result, the gas flowing in from the inflow port 12 flows through the inside of the cylindrical body 4 to the outflow port 13 side.

An overflow prevention valve is provided inside the large diameter portion 41 of the cylinder 4. That is, the ball valve 5 is provided inside the large diameter portion 41 so as to be vertically movable. The ball valve 5 is normally supported by a pin 102 provided on the cylinder 4. A valve seat 44 facing downward is formed at an intermediate portion of the inner peripheral surface of the cylindrical body 4. When the flow rate of the gas flowing in the cylinder 4 becomes an overflow state, the ball valve 5 is floated by the gas and seated on the valve seat 44,
As a result, the overflow state is instantaneously eliminated.

Further, on the inner peripheral surface of the upper end portion of the cylindrical body 4, a pair of protrusions 45, 45 extending in the vertical direction
The fitting groove 47 is formed by a pair of protrusions 45 and 45 and the inner peripheral surface of the cylindrical body 4. On the outer peripheral surface of the upper end portion of the small-diameter portion 42, two projections 46 are separated from each other by 180 ° in the circumferential direction.
Are formed at a distance of approximately 45 ° in the circumferential direction. The lower end of the projection 46 has a semicircular shape, and the upper end has a gradually narrower width and a gradually lower height, and the upper end of the cylindrical body 4 has a height of zero.

On the inner peripheral surface of the small diameter portion 42 of the cylindrical body 4, a valve 6
Are connected to be vertically movable and non-rotatable.
The valve element 6 is made of a resin such as polyacetal,
As shown in FIG. 9, a disc-shaped valve portion 61 is provided at the center thereof.
It has. The valve portion 61 shields the upper end opening of the cylindrical body 4 by contacting the upper end surface of the cylindrical body 4, and has a pair of legs 62, 62 extending downward on the lower surface thereof.
Are formed. At the lower ends of the legs 62, 62, there are formed connecting portions 63 for connecting and reinforcing them. A projecting portion 64 extending downward from the center of the connecting portion 63 is formed.

On the other hand, on the upper surface of the valve portion 61, there are formed two projections 65, 65 facing each other with the center thereof interposed therebetween, and a cylindrical portion 66 surrounding the two projections 65 is formed. In the middle part of the outer peripheral surface of the cylindrical part 66, two engagement projections 67, 67 are circumferentially separated from each other by 180 °,
And it is formed so as to be substantially 45 ° apart from the leg 62 in the circumferential direction. It is to be noted that the crossing diameter of the two engagement protrusions 67 is the same as the outer diameter of the valve portion 61, as is clear from FIG. 9C.

In the valve body 6 having the above structure, the legs 62, 62 are slidably inserted into the fitting grooves 47, 47, respectively.
Thereby, it is connected to the cylindrical body 4 so as to be vertically movable and non-rotatable.

An operating member 7 is fitted on the outer peripheral surface of the small diameter portion 42 of the cylindrical body 4 so as to be movable in a predetermined range in the vertical direction and rotatable in a predetermined range in the circumferential direction. The operation member 7 is made of a resin such as polyacetal, and has a tubular portion 71 as shown in FIG. The inner diameter of the cylindrical portion 71 is slightly larger than the outer diameter of the small diameter portion 42 so as to slidably and rotatably fit on the outer peripheral surface of the small diameter portion 42 of the cylindrical body 4. Two window holes 72, 72 are formed in the peripheral wall of the cylindrical portion 71 at 180 ° apart from each other in the circumferential direction. The window 72 has a substantially square shape,
The lower side 72a, the upper side 72b, and the closing rotation direction of the plug 3 (hereinafter, referred to as
It is called the closing direction. ) And a left side 72d that faces the opening rotation direction of the plug 3 (hereinafter referred to as the opening direction). Between the lower side 72a and the right side 72c, there is formed a cam surface 72e that goes upward from the left side 72d to the right side 72c.

When the cylindrical portion 71 is fitted on the outer peripheral surface of the small-diameter portion 42 of the cylindrical body 4, the projection 46 of the cylindrical body 4 enters the window hole 72. In this case, as shown in FIGS. 1 to 3 and 11, a first spring 8 is mounted between the lower end surface of the cylindrical portion 71 and the annular projecting portion 43 of the cylindrical body 4. The operating member 7 is urged upward by the spring 8. Therefore, usually, by the urging force of the first spring 8,
The projection 46 is in contact with the lower side 72a of the window hole 72 (see FIG. 12A). When the operating member 7 is rotated in the closing direction (the direction opposite to the arrow in FIG. 12) from the state where the projection 46 is in contact with the lower side 72a, the projection 46 comes into contact with the cam surface 72e as shown in FIG. Touch As a result, the operation member 7 moves downward against the urging force of the first spring 8. As is apparent from this point, the projection 46 and the cam surface 72e constitute a cam mechanism.

In order to make the projection 46 enter the window hole 72, the cylindrical portion 71 may be inserted into the outer periphery of the small diameter portion 42. When the cylindrical portion 71 is inserted into the outer periphery of the small diameter portion 42, the cylindrical portion 7
Due to the elastic deformation of 1, the inner peripheral surface gets over the protrusion 46, and the protrusion 46 enters the window hole 72. In this case, an inclined surface 73 is formed in a portion between the window hole 72 and the lower end surface of the inner peripheral surface of the cylindrical portion 71 so that the inner peripheral surface of the cylindrical portion 71 can easily climb over the projection 46. Of course,
For the same reason, the height of the upper half of the projection 46 is gradually reduced as it goes upward.

A sub-window 74 is formed between the two windows 72, 72, and the gas flowing out of the upper end opening of the cylinder 4 when the valve is opened opens the window 72 and the sub-window 74. Through the outlet 13.

Further, an upper wall portion 75 is formed at the upper end portion of the cylindrical portion 71 to shield the opening. A through hole 76 is formed in the center of the upper wall 75. The through hole 76 has a slightly larger diameter than the cylindrical portion 66 of the valve body 6, and the cylindrical portion 66 is inserted into the through hole 76. Further, two notches 77, 77 having a fan shape are formed on the inner peripheral surface of the through hole 76 so as to be 180 ° apart in the circumferential direction. The inside diameter of the two cutouts 77, 77 is slightly larger than the outside diameter of the two engagement protrusions 67, 67 of the valve body 6. Therefore, when the operation member 7 moves downward by the action of the cam mechanism, the engagement protrusions 67 move relatively upward through the notches 77, 77 and are positioned above the upper wall portion 75. (See FIG. 13C).

When the engaging projections 67 and 67 are located above the upper wall 75, the operating member 7 is opened in the opening direction (FIG. 13) until the engaging projection 67 comes into contact with an engaging portion 78 described later.
(In the direction indicated by the arrow in FIG. 13), the portion 75a of the upper wall 75 located between the notch 77 and the leg 78a faces the engaging projection 67 (see FIG. 13D). When the operating member 7 moves upward in this state, the portion 75a comes into contact with and engages with the engagement protrusion 67, and as a result, the valve body 6
Will move upward together with it.

Further, two notches 7 are formed on the upper surface of the upper wall portion 75.
An engagement portion 78 is formed in a portion between 7, 77. The engaging portion 78 includes two legs 78a, 78a extending upward from the upper surface of the upper wall portion 75, and a connecting portion 78b connecting the upper ends of the two legs 78a, 78a. The legs 78a, 78a are arranged between the two notches 77, 77. Moreover, the leg 78
a, 78a are cylindrical portions 66 of the valve body 6 that pass through the through holes 76;
The surfaces facing each other are arc-shaped surfaces having the same center and diameter as the through-holes 76 so that the holes can enter between them.

The engaging portion 78 is provided in the engaging recess 3 of the plug 3.
When the engagement portion 78 and the engagement recess 32a are engaged with each other, the operation member 7 rotates integrally with the plug 3 when the engagement portion 78 is engaged with the engagement recess 32a. Move. On the other hand, when the plug 3 is rotated from the open position to the closed position or immediately before it, the engagement depth between the engagement portion 78 and the engagement concave portion 32a (the depth in the up-down direction) is different from that of the projection 46. The movement amount is the same as the amount by which the operation member 7 is moved downward by the cam action with the cam surface 72e. Therefore, when the plug 3 is positioned at the closed position, the engagement between the engaging portion 78 and the engaging concave portion 32a is released, and the operation member 7 can rotate with respect to the plug 3. As is clear from this, the engaging mechanism is constituted by the engaging concave portion 32a and the engaging portion 78. When the operation member 78 rotates with respect to the plug 3, the connecting portion 78 b rotates with the urging force of the first spring 8 in contact with the bottom surface of the vertical hole 32.

A second spring 9 is mounted between the valve 6 and the operating member 7. The lower end of the second spring 9 is inserted into the cylindrical portion 66 of the valve body 6 and abuts on the upper surface of the valve portion 61, and the end of the wire is connected between the two protrusions 65, 65. Is connected to the valve body 6 so as not to rotate. On the other hand, the upper end of the second spring 9 extends along the inner peripheral surfaces of the two legs 78a, 78a, and is in contact with the lower surface of the connecting portion 78b. Moreover, the upper end of the wire of the second spring 9 is inserted between the two projections 79, 79 formed on the lower surface of the connecting portion 78b, thereby being non-rotatably connected to the operating member 7. . The second spring 9 connected to the valve body 6 and the operating member 7 in this manner is mounted between the two in a compressed and twisted state. As a result, the second spring 9 biases the valve body 6 downward, biases the operation member 7 upward, and further biases the operation member 7 in the opening direction.
The second spring 9 urges the valve body 6 in the closing direction. However, since the valve body 6 is engaged with the cylinder 4 so as not to rotate,
It is not rotated by the second spring 9.

Next, the operation of the gas cock configured as described above will be described. In the open state shown in FIG. 1, the lateral hole 33 of the plug 3 is connected to the outflow port 1 through the through hole 22 of the rubber packing 2.
The plug 3 is located in the open position so as to communicate with the plug 3. At this time, the operating member 7 has its engaging portion 78 engaged with the engaging concave portion 32a of the plug 3, and
As shown in FIG. 2A, the lower side 72a of the window hole 72 is moved upward by the first spring 8 until the lower side 72a of the window hole 72 comes into contact with the projection 46 of the cylindrical body 4. Further, as shown in FIG. 2
The spring 78 is urged in the opening direction (the direction of the arrow in FIG. 13), and the leg 78 a of the engaging portion 78 is brought into contact with the engaging projection 67 of the valve 6. Moreover, in this state,
The valve body 6 is moved upward together with the operation member 7 by the portion 75a of the upper wall 75 of the operation member 7 engaging with the engagement projection 67, and the valve portion 61 of the valve body 6 is , And the upper end opening of the cylindrical body 4 is opened.

In the above-mentioned open state, the gas flowing from the inflow port 12 passes through the inside of the cylinder 4 and
The vertical hole 32 of the plug 3 through the window hole 72 and the sub-window hole 74
From there, through the lateral hole 33 and the through hole 22 to the outlet 13. At this time, when the flow rate of the gas becomes excessive, the ball valve 5 is lifted up from the support pin 102 by the gas and is seated on the valve seat 44. Therefore, the overflow state is instantaneously eliminated.

When the plug 3 is slightly rotated in the closing direction (the direction opposite to the arrow in FIGS. 12 and 13) from the above-described open state, that is, the engagement length of the engagement projection 67 and the portion 65a in the circumferential direction is reduced. When the stopper 3 is rotated in the closing direction by the distance, the operating member 7 is rotated by the same amount in the same direction as the stopper 3 by the engagement between the engaging portion 78 and the engaging concave portion 32a. As a result, as shown in FIG.
The engagement with 5a is released. Engagement protrusion 67 and portion 65a
Is released, the valve body 6 is moved downward by the second spring 9, and as shown in FIG.
Abuts on the upper end surface of the cylindrical body 4 to shield the upper end opening of the cylindrical body 4. Therefore, the gas is prevented from flowing from the inflow port 12 to the outflow port 13 even though the plug 3 is located at the half-open position.

In the state where the valve element 6 is in contact with the cylinder 4, if the ball valve 5 is assumed to be seated on the valve seat 44, the lower end of the projection 64 abuts the ball valve 5 from above. Then, the ball valve 5 is pushed down. Thereby, the ball valve 5 is reset.

When the plug 3 is further rotated in the closing direction, as shown in FIG. 12C, the cam surface 72e of the operating member 7 comes into contact with the projection 46, and as a result, the operating member 7 It is moved downward against the urging force. As a result of the operation member 7 being moved downward, the engagement portion 78 and the engagement
a and the projection 67 of the valve element 6
Moves relatively upward through the notch 77.

When the plug 3 is turned by approximately 90 ° to the closed position, the operating member 7 moves further downward, so that
The engagement projection 67 of the valve 6 passes through the notch 77 and relatively moves upward until it is located slightly above the upper wall 75. In addition, at this time, the engaging portion 78 escapes from the engaging concave portion 32a, and the engagement between them is released. Then, the operating member 7 is rotated in the opening direction by the urging force of the second spring 9 until the leg portion 78a of the engaging portion 78 comes into contact with the engaging protrusion 67 of the valve body 6. As a result, as shown in FIG. 13D, the phases of the engaging portion 78 and the engaging concave portion 32a are shifted by 90 °.

At this time, the upper surface of the engaging portion 78 is
The vertical position of the operating member 7 before and after the rotation is constant because the operating member 7 is brought into contact with the bottom surface of the vertical hole 32 by the urging force. Therefore, after the rotation of the operation member 7, the portion 75 a of the upper wall portion 75 is positioned below the engagement protrusion 67 of the valve body 6 and faces the same. In this case, since the portion 75a and the engagement protrusion 67 are vertically separated from each other, the valve body 6 is not affected at all by the rotation of the operation member 7, and the upper end opening of the cylindrical body 4 is blocked. Continue to maintain state. When the plug 3 is turned to the closed position, the inlet 12 and the outlet 13 are of course blocked by the plug 3 as shown in FIG.

Next, to open the gas cock in the closed state, the stopper 3 is rotated from the closed position to the open position.
At this time, since the engaging portion 78 has escaped from the engaging concave portion 32a, the operating member 7 does not rotate with the rotation of the plug 3. Therefore, when the plug 3 is rotated by approximately 90 ° from the closed position to the open position, the phase of the engaging recess 32a matches the phase of the engaging portion 78. Therefore, the engagement portion 78 can be fitted into the engagement recess 32a, and the operation member 7 is connected to the first spring 8
And it is moved upward by the urging force of the second spring 9. When the operation member 7 slightly moves upward, the upper wall 75
Abuts against the engagement projection 67 of the valve body 6, and the two are integrated by the second spring 9. Therefore, thereafter, the valve element 6 and the operation member 7 are moved integrally by the urging force of the first spring 8. And the lower side 7 of the window hole 72
Both stop when the projection 2a hits the projection 46. In the stopped state, the engaging portion 78 is
And the valve body 6 is separated upward from the cylinder body 4 to open the upper end opening. Of course, the lateral hole 33 of the plug 3 is connected to the outflow hole 1 through the through hole 22 of the rubber packing 2.
It is in communication with 3. That is, it returns to the open state shown in FIG.

Here, in the above-described gas cock, since the engaging recess 32a is formed on the bottom surface of the vertical hole 32 of the plug 3, it is not necessary to increase the thickness of the main body 31 of the plug 3. Therefore, it is possible to prevent the plug 3 from increasing in diameter, thereby preventing the entire gas cock from increasing in size. Of course, since the locking ring in the conventional gas cock is not required, the number of parts does not increase.

In this embodiment, the engagement recess 3
An increase in the length of the plug 3 due to the formation of 2a can be minimized. That is, in a normal gas cock having a gas leakage prevention valve (for example, the gas cock described in the above publication), a gap is formed between the bottom surface of the vertical hole and the upper end surface of the operation member. In the gas cock, the upper end surface of the engaging portion is made to abut against the bottom surface of the vertical hole 32a, so that the length of the plug 3 can be shortened accordingly. Thus, the entire gas cock can be further reduced in size.

[0041]

As described above, according to the gas cock of the present invention, the engaging recess for rotating the operating member together with the plug is formed on the bottom surface of the vertical hole of the plug, so that the number of parts can be reduced. Without increasing the diameter, it is possible to prevent an increase in the diameter of the plug body and an increase in the overall size based on the diameter. In addition, when the distal end surface of the engaging portion of the operating member is made to abut against the bottom surface of the vertical hole, the length of the plug can be minimized, thereby further miniaturizing the entire gas cock. can do.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of the present invention when opened.

FIG. 2 is a vertical cross-sectional view of a main part when the embodiment is half-opened.

FIG. 3 is a longitudinal sectional view of a main part when the embodiment is closed.

FIG. 4 is a side view showing the whole of the embodiment.

FIG. 5 shows the cock body of the embodiment,
FIG. 5A is a longitudinal sectional view, and FIG. 5B is an enlarged view of FIG.

FIG. 6 shows a rubber packing of the embodiment, and FIG.
(A) is a front view thereof, and FIG. 6 (B) is a BB line of FIG. 6 (A).
FIG. 6C is a cross-sectional view taken along the arrow in FIG.

7 (A) is a front view of the plug according to the embodiment, and FIGS. 7 (B) and 7 (C) are views taken along arrows B and C of FIG. 7 (A), respectively. , FIG. 7D and FIG.
It is DD and EE sectional drawing of (B).

8 (A) is a front view, FIG. 8 (B) is a view on arrow B of FIG. 8 (A), and FIG.
(C) and (D) are respectively CC and DD of FIG.
FIG. 8E is a cross-sectional view of FIG.
FIG. 9F is a side view of FIG.

9A and 9B show the valve body of the embodiment, FIG. 9A is a front view thereof, FIG. 9B is a side view thereof, and FIGS.
(D) is a view taken in the direction of arrow C and D in FIG.
(E) is an EE cross-sectional view of FIG. 9 (A).

FIG. 10 shows an operation member of the embodiment, and FIG.
(A) is its front view, FIG. 10 (B) is its side view, FIG.
0 (C) is a sectional view taken along line CC of FIG. 10 (B), and FIG.
(D) and (E) are a view taken along arrows D and E in FIG. 10 (A), respectively.

FIG. 11 is an exploded perspective view showing the gas leakage prevention valve of the embodiment.

12A and 12B are diagrams illustrating a relationship between a window hole and a projection according to the embodiment, and FIG. 12A illustrates a relationship when the window is opened;
FIG. 12B shows a relationship in a state where the stopper is slightly rotated from the open position to the closed position, FIG. 12C shows a relationship in a state immediately before closing, and FIG. 12D shows a relationship in a closed state. Is shown.

13A and 13B show the relationship between the engagement protrusion of the valve body of the embodiment, the upper wall portion of the operation member and the notch, and FIG. 13A shows the relationship at the time of opening, and FIG. 13C shows a relationship in a state where the stopper is slightly rotated from the open position to the closed position, and FIG. 13C shows a relationship in a state immediately before closing.
FIG. 13D shows the relationship at the time of closing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cock main body, 3 plug body 4 cylinder body 6 valve body 7 operating member 8 1st spring (elastic member) 10 gas leakage prevention valve 11 plug insertion hole 12 inflow port 13 outflow port 32 vertical hole 32a engagement recess 33 side hole 46 Projection 72 Window hole 72e Cam surface 78 Engagement part

Claims (2)

(57) [Scope of request for utility model registration] 1. A cock body having an inlet and an outlet, a vertical hole extending from one end surface along an axis, and a horizontal hole extending from the vertical hole to an outer peripheral surface, and is located at an open position inside the cock body. And a stopper provided rotatably between a closed position and the inside of the cock body in a state where the tip is inserted into the vertical hole, and through the inside, the inflow port and the vertical hole are connected. A valve body provided in the vertical hole so as to be movable in the axial direction thereof, and abutting against a distal end surface of the cylindrical body to shield a distal end opening of the cylindrical body; and a vertical hole of the plug body. And an operating member that is provided rotatably and movably in the axial direction of the plug body, and separates the valve body from the distal end surface of the cylindrical body only when the plug body is located at the substantially open position. A gas leakage prevention valve is provided, and an operation is provided between the stopper and the operation member. An engagement mechanism for rotating the working member with the rotation of the stopper is provided so as to be disengageable, and between the operation member and the cylinder, the stopper is rotated to a substantially closed position. In a gas cock provided with a cam mechanism for moving the operation member toward one end surface side of the plug so that the engagement of the engagement mechanism is released, the engagement mechanism may be provided in a vertical hole of the plug . And an engagement portion formed at the upper end of the operating member and engaged with the engagement recess so as to be non-rotatably and removably insertable. Gas cock. 2. The operating member is urged toward the bottom of the vertical hole by an elastic member, and the engaging portion abuts against the bottom surface of the vertical hole when the engaging portion comes out of the engaging concave portion. The gas cock according to claim 1, wherein the gas cock is configured as follows.