JPH08261337A - Gas cock - Google Patents

Abstract

PURPOSE: To connect a gas cock directly to a gas apparatus. CONSTITUTION: In a gas cock 1 wherein a flexible hose is connected to a gas inflow passage 11, one end part of a coupling member 40 is rotatably arranged in a sealed state at a gas cock body 10. A screw hole 44 communicated with a gas outflow passage 12 is formed in the coupling member 40. A gas apparatus is connected in a screwed-in state to the screw hole 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cock.

[0002]

2. Description of the Related Art In a gas cock, a plug is rotatably housed in a gas cock body having a gas inflow passage and a gas outflow passage, and the plug is rotated by a handle so as to rotate the gas inflow passage and the gas outflow passage. There is a structure that connects or disconnects with. In this type of gas cock, various piping component connection structures are adopted for the gas inflow passage and the gas outflow passage. For example, a screw hole at the end of each passage, a male screw on the outer peripheral surface of the gas cock body corresponding to the end of each passage, an outer circumference of the gas cock body corresponding to the end of the gas outflow passage. The surface is a hose end, etc.

[0003]

However, the conventional gas cock described above has a drawback in that a gas appliance such as a gas stove cannot be directly connected to the gas cock. Because, normally, the gas cock is fixed by connecting the gas inflow side to a gas pipe or the like. Therefore, the gas cock cannot be subsequently turned to screw the gas appliance into the screw hole or the male screw of the gas cock. On the other hand, in the case of the gas cock whose gas outlet side is the hose end, it goes without saying that it cannot be connected without the gas hose. Therefore, in the case of the conventional pipe connection structure, the gas appliance could not be directly connected to the gas cock. In addition to the above problems, when removing a gas appliance that was connected to a gas cock via a gas hose or the like from the gas hose, or when removing the gas hose or the like from this gas cock, the removal work should be done with the gas cock open. There is also a problem that there is a risk of releasing gas. The present invention has been made in view of the problems of the above-mentioned conventional techniques, and an object thereof is to provide a gas cock that can directly connect a gas appliance, and to provide a gas cock that is more excellent in safety in addition to the gas cock. There is a place to do it.

[0004]

In order to achieve the above object, the invention according to claim 1 is such that a stopper is rotatably housed in a gas cock body, and the stopper is rotated through a handle. In a gas cock in which a gas inflow passage to which a flexible hose is connected and a gas outflow passage to which a gas appliance is connected are connected and cut off, a gas appliance is screwed into one end and is connected to the gas outflow passage of the gas cock body. The other end portion of the connecting member having a threaded hole through which the outer peripheral surface of the one end portion serves as a tool hanging portion for a tool such as a spanner,
It is characterized in that the gas cock body is rotatably supported in a sealed state. The invention according to claim 2 is
The gas cock according to claim 1 is characterized by including the following (a) erroneous operation prevention cover and (b) lock part. (B) It is attached to the support portion for the connecting member in the gas cock body so as to be able to project and retract, and when it protrudes outward, it covers the tool hook of the connecting member to make it impossible to hook the tool, and when it sinks inward, the tool A misoperation prevention cover that exposes the hanging part and allows tools to be hooked. (B) When the gas inflow passage and the gas outflow passage of the gas cock body are communicated with each other, the erroneous operation preventing cover is engaged with the erroneous operation preventing cover that protrudes outward to prevent the erroneous operation preventing cover from moving inward. A lock portion provided on the handle, which is disengaged from the erroneous operation prevention cover when the inflow passage and the gas outflow passage are blocked. In the invention according to claim 3, a cylindrical sliding surface is formed between the gas cock body and the connecting member, and lubricating oil is lubricated between both sliding surfaces so that the lubricating oil is provided between the sliding surfaces. It is characterized by being sealed by an oil film. The invention according to claim 4 is characterized in that the diameter difference between the two sliding surfaces is 50 μm or less, and silicone oil is used as the lubricating oil. The invention according to claim 5 is characterized in that the difference in diameter between the two sliding surfaces is 100 μm or less, and grease is used as the lubricating oil.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a gas cock according to the present invention will be described below with reference to the drawings from FIG. 1 to FIG. First, a first embodiment of a gas cock according to the present invention will be described with reference to FIGS. 1 to 5. 1 to 3 show a state where the gas cock is closed, and FIGS. 4 and 5 show a state where the gas cock is opened.

As shown in FIG. 1, the gas cock 1 is substantially L-shaped when viewed from the front. The gas cock 1 has a gas cock body 10 in which a gas inflow passage 11 and a gas outflow passage 12 are provided. The gas inflow passage 11 and the gas outflow passage 12 are arranged so as to be orthogonal to each other, and when the gas cock 1 is installed with the gas inflow passage 11 facing downward,
Gas flows in from below and flows out horizontally. In addition, in the following description, the gas cock 1 assumes the above-described posture unless otherwise specified.

In the gas cock body 10, a taper hole-shaped plug accommodating portion 13 is provided at a portion where the gas inflow passage 11 and the gas outflow passage 12 intersect with each other. A plug 20 for connecting or blocking the outflow passage 12 is rotatably housed.
The outer peripheral surface 21 of the stopper 20 is a tapered surface corresponding to the stopper accommodating portion 13, and the stopper 20 has an outer peripheral surface 21 corresponding to the stopper accommodating portion 13.
Close to the inner wall of the. A gas passage 22 having a substantially L shape is provided inside the stopper 20. One end side of the gas passage 22 is always connected to the gas inflow passage 11 of the gas cock body 10, and when the other end side of the gas passage 22 is connected to the gas outflow passage 12 of the gas cock body 10, the gas inflow passage 11 and the gas outflow passage 12 are connected. Is connected to allow the gas to flow, and at other times, the other end of the gas passage 22 is closed by the wall surface of the plug housing portion 13, and the gas inflow passage 11 and the gas outflow passage 12 are blocked by the plug 20. It will be.

The stopper 20 is connected to a handle 30 arranged above the gas cock body 10 via an intermediate member 23, and the stopper 20 can be rotated by the handle 30. However, the rotation angle of the handle 30 is regulated to 90 ° by a regulation mechanism (not shown), and when the gas cock 1 is in the closed state, the knob portion 32 provided on the upper surface of the cylindrical portion 31 of the handle 30 is seen in plan view. It is positioned so as to be orthogonal to the axis of the gas outflow passage 12 of the main body 10 (see FIG. 2), and when the handle 30 is rotated counterclockwise in FIG. 2 by 90 ° from this state, the plug 20 also rotates in synchronization. Then, the gas cock 1 is opened, and the knob portion 32 of the handle 30 is positioned along the axis of the gas outflow passage 12 of the gas cock body 10 (see FIG. 5).

In the gas cock body 10, a portion corresponding to the outer end of the gas outflow passage 12 is a support portion 14 for a connecting member 40 described later. This support 1
4 has a kind of double pipe structure, and has a small diameter pipe portion 15 and a large diameter pipe portion 16. The inside of the small-diameter pipe portion 15 serves as the gas outflow passage 12. The large-diameter pipe portion 16 projects outward from the small-diameter pipe portion 15, and includes a thick-walled portion 16a located outside the small-diameter pipe portion 15 and a thin-walled portion 16b protruding further outward from the thick-walled portion 16a. It is configured.

The connecting member 40 has a small diameter portion 41 having a circular cross section.
And a large diameter portion 42 having a circular cross section extending from the small diameter portion 41, and a tool hooking portion 43 extending from the large diameter portion 42 and having a substantially hexagonal cross section so that a tool such as a spanner can be hooked. Further, the connecting member 40 is provided with a screw hole 44 that opens to the end surface on the tool hanging portion 43 side.
4 is connected to a through hole 45 that opens at the end surface of the small diameter portion 41.

In this connecting member 40, the small diameter pipe portion 15 of the gas cock body 10 is inserted into the through hole 45, and the small diameter portion 41 is inserted into the thick wall portion 16a of the large diameter pipe portion 16 of the gas cock body 10 to make The diameter portion 42 is inserted into the thin portion 16b of the large diameter pipe portion 16 and is rotatably supported with respect to the gas cock body 10. The tool hooking portion 43 projects outward from the large diameter pipe portion 16. There is. Furthermore, the connecting member 40
By inserting the outer peripheral portion of the retaining ring 50 fitted in the groove of the outer peripheral surface of the small diameter portion 41 into the groove provided in the thick portion 16a of the large diameter pipe portion 16 of the gas cock main body 10. It is supported immovably with respect to 10 in the axial direction of the gas outflow passage 12.

A seal ring 51 is mounted between the outer peripheral surface of the small-diameter pipe portion 15 of the gas cock body 10 and the through hole 45 of the connecting member 40 so as to prevent gas from leaking.

The inner peripheral surface of the thin portion 16b of the large-diameter pipe portion 16 of the gas cock body 10 and the large-diameter portion 4 of the connecting member 40.
The outer peripheral surfaces of 2 are sliding surfaces with respect to each other. The inner peripheral surface of the thin portion 16b of the gas cock body 10 and the connecting member 4
By setting the diameter difference of the outer peripheral surface of the large diameter portion 42 of 0 to a predetermined value, and further, lubricating oil is injected between these sliding surfaces,
Ensure extremely high airtightness in this sliding part,
It functions as a safety device when the seal ring 51 is damaged, and reliably prevents gas leakage. still,
The airtightness on the sliding surface will be described in detail later.

A cylindrical erroneous operation prevention cover 60 is attached to the outside of the large-diameter pipe portion 16 of the support portion 14 of the gas cock body 10 so as to be movable in its axial direction. The erroneous operation prevention cover 60 is, as shown in FIGS.
When the gas cock body 10 is located closest to the inside of the gas cock body 10, the tip end surface of the gas cock body 10 has a large diameter pipe portion 16
It is almost flush with the tip surface of. Misoperation prevention cover 6
0 has a step portion 61 in the middle of its inner peripheral surface. The inner diameter of the base end side of the step portion 61 is slightly larger than the outer diameter of the large diameter pipe portion 16, and the tip end side of the step portion 61 is smaller than the outer diameter of the large diameter pipe portion 16. The inner diameter is larger than the inner diameter on the base end side and is slightly larger than the circumscribed circle diameter of the tool hooking portion 43 of the connecting member 40. Therefore, the erroneous operation prevention cover 60 can be pulled out to the outside, and when the erroneous operation prevention cover 60 is pulled out to the outside, the step portion 61 is hooked on the end face of the tool hooking portion 43 of the coupling member 40 on the base end side. It stops and stops, and the portion on the tip side of the step portion 61 of the erroneous operation prevention cover 60 is the tool hanging portion 43.
Is almost covered.

The erroneous operation prevention cover 60 is designed to be prevented from moving inward by a collar portion (lock portion) 33 provided on the handle 30. The flange portion 33 is provided so as to project outward from the cylindrical portion 31, and in plan view is formed in a fan shape around the upper left quarter arc of the cylindrical portion 31 when the plug 20 shown in FIG. 2 is in the closed state. ing. Tsubabe 3
The outer edge of 3 extends downward, and the lower end thereof is located below the upper end of the outer peripheral surface of the erroneous operation prevention cover 60. However, when the stopper 20 is closed and the handle 30 is in the state shown in FIG.
As shown in FIG. 3, the erroneous operation prevention cover 60 is provided at the outer edge portion of the collar portion 33 so that it can be closest to the inside.
The portion that interferes with is cut into an arc shape to form a recess 34.

As described above, since the handle portion 30 is provided with the collar portion 33, when the stopper 20 is in the closed state and the handle 30 is as shown in FIG.
In order to open 0, the erroneous operation prevention cover 60 must be pulled out to the outside so that the recess 34 of the collar portion 33 of the handle 30 hits the outer peripheral surface of the erroneous operation prevention cover 60 and cannot rotate. In addition, the erroneous operation prevention cover 60 is pulled out to rotate the handle 30,
When 0 is positioned as shown in FIG. 5, the base end face of the erroneous operation prevention cover 60 engages with the outer peripheral surface of the collar portion 33 of the handle 30, as shown in FIG. Cannot move further inward.
Therefore, most of the tool hooking portion 43 of the connecting member 40 is covered with the erroneous operation prevention cover 60, and it becomes impossible to hook a tool such as a spanner on the tool hooking portion 43, and the connecting member 4
It is not possible to rotate 0.

The gas inflow passage 1 of the gas cock body 10
A flexible hose 70 can be connected to 1. That is, the gas inflow passage 11 of the gas cock body 10
A connection port 17 connected to the gas inflow passage 11 is provided at the end on the side, and as shown in FIG.
The flexible hose 70 is inserted by inserting the seal ring 71 and the flexible hose 70 having the intermediate member 72 attached to the tip thereof, and screwing the nut 73 into the male screw portion 18 provided on the outer surface of the end of the gas cock body 10 and tightening the screw.
Is connected to the gas cock body 10.

By the way, in this gas cock 1,
Thin portion 16 in large-diameter pipe portion 16 of gas cock body 10
The diameter difference between the inner peripheral surface of b and the outer peripheral surface of the large-diameter portion 42 of the connecting member 40 is set to a predetermined value, and lubricating oil is injected between both sliding surfaces, so that the airtightness of this sliding surface is improved. As described above, it is confirmed by the experiment. The experimental results are described below.

In the experiment, one having the same structure as the gas cock 1 of the above-mentioned embodiment from which the seal ring 51 is removed is used, and one of the sliding surfaces has a diameter of 15 mm, and is arranged along the axial direction of the connecting member 40. A sliding surface having a length of 6 mm was used. Then, the screw hole 44 of the connecting member 40 is appropriately stoppered, and the stopper 20 of the gas cock 1 is opened,
An appropriate pressurized air supply device was connected to the connection port 17, and air having a pressure higher than the atmospheric pressure by 420 mmH ₂ O was supplied to the gas cock 1. The laboratory temperature during the experiment was 20 °
Met.

In the first experiment, silicone oil KF96H manufactured by Shin-Etsu Silicone Co., Ltd. was used as a lubricating oil between the sliding surfaces.
(Product name) was lubricated to form an oil film over the entire length between the sliding surfaces. As a result, when silicone oil with a viscosity of 30,000 centistokes was used, there was no air leakage from this sliding surface (that is, the amount of air leakage was zero) at a sliding surface diameter difference of 3 to 50 μm. The difference is 61 μm and the air leakage amount is 2562 cc / Hr, the diameter difference is 80 μm and the air leakage amount is 2090 cc / Hr, the diameter difference is 100 μm.
The air leakage amount of 7508 cc / Hr was measured at.

When silicone oil having a viscosity of 50,000 centistokes is used, there is no air leakage from the sliding surface (that is, the amount of air leakage is zero) when the difference in diameter between the sliding surfaces is 3 to 50 μm. The diameter difference was 61 μm and the air leak amount was 273 cc / Hr, the diameter difference was 80 μm and the air leak amount was 546 cc / Hr, and the diameter difference was 100 μm and the air leak amount was 5818 cc / Hr.

Therefore, when silicone oil was used as the lubricating oil, no air leakage was observed when the diameter difference of the sliding surface was 50 μm or less, and it was confirmed that the sliding surface was highly airtight. .

Further, in the second experiment, Cock Grease T-2 (trade name) of Nippon Grease Co., Ltd. was lubricated as a lubricating oil between the sliding surfaces, and an oil film was formed over the entire length between the sliding surfaces. Formed. In this case, when the diameter difference between the sliding surfaces was 100 μm or less, there was no air leakage from the sliding surfaces, and it was confirmed that the airtightness was as high as that of the silicone oil.

In the gas cock 1, the gas cock 1 can be installed at a predetermined place and connected to the gas main pipe, and then a gas appliance such as a gas stove can be directly connected to the gas cock 1. Next, the procedure will be described.

The gas cock 1 with the plug 20 closed is installed at a predetermined position, and the flexible hose connected to the gas main pipe is connected to the connection port 17 of the gas cock body 10 in the above-described manner.
Connect to. Next, the erroneous operation prevention cover 60 is moved inward to fully expose the tool hooking portion 43 of the connecting member 40. Then, a male screw portion (not shown) extending from the gas appliance to be connected is screwed into the screw hole 44 of the connecting member 43, and the connecting member 40 is tightened. At that time, a tool such as a spanner is hooked on the tool hook 43 of the connecting member 40 to sufficiently tighten it. With this, even if the gas cock 1 itself cannot rotate, the gas appliance can be directly connected to the gas cock 1.

When the gas cock 1 is opened, the erroneous operation prevention cover 60 is pulled out and the handle 30 is rotated counterclockwise.

When the gas cock 1 is opened as described above, the erroneous operation preventing cover 60 almost covers the tool hook 43 of the connecting member 40. In addition, as described above, in this state, the collar portion 33 of the handle 30 prevents the erroneous operation prevention cover 6 from operating.
It is hooked on the end surface of 0 to prevent the erroneous operation prevention cover 30 from moving inward. Therefore, a tool such as a spanner cannot be hooked on the tool hook 43 of the connecting member 40, and the connecting member 40 cannot be loosened. In the case of this gas cock 1, in order to remove the gas appliance, the handle 30 must be rotated to the closed state and the erroneous operation prevention cover 60 must be moved inward to expose the tool hook 43 of the connecting member 40. The connecting member 40 cannot be loosened using a tool. Therefore, it is possible to prevent an accident in which the gas appliance is accidentally removed from the gas cock 1 with the gas cock 1 left open and the gas is leaked.

6 to 9 show a gas cock 1 according to a second embodiment. 6 and 7 show the gas cock 1 in the closed state, and FIGS. 8 and 9 show the open state. Parts of this gas cock 1 that are the same as those of the gas cock 1 of the first embodiment described above are assigned the same reference numerals and explanations thereof are omitted, and only the differences will be described below.

There are two major differences between this gas cock 1 and that of the first embodiment. One is that the erroneous operation prevention cover 60 is always elastically urged outward.
A ring-shaped protrusion is provided on the inner peripheral surface of the erroneous operation prevention cover 60, and a spring 65 is housed between the protrusion and the gas cock body 10. Urged to.
Further, the projection is hooked on the end surface of the tool hooking portion 43 of the connecting member 40 on the base side to prevent the erroneous operation prevention cover 60 from popping out and coming off from the gas cock body 10.

Another difference lies in the shape of the handle 30. In the handle 30 of the gas cock 1 according to the first embodiment, the lower portion of the knob 32 has a substantially cylindrical portion 31.
However, the lower portion 35 of the knob 32 of the gas cock 1 according to the second embodiment has a substantially oval shape in plan view that bulges to one side in the longitudinal direction of the knob 32, as shown in FIGS. 7 and 9. The bulging portion 35a of the lower portion 35 is the first
The lock portion corresponds to the collar portion 33 in the embodiment.

In the case of the gas cock 1 of the second embodiment, since the erroneous operation prevention cover 60 is biased outward by the spring 65, the gas cock 1 is normally connected when the gas cock 1 is open or closed. The tool hanging portion 43 of the member 40 is covered with an erroneous operation prevention cover 60. Therefore, a spanner or the like cannot be hooked on the tool hook 43 of the connecting member 40.

When the gas cock 1 is in the closed state, a spring 65 is attached to the erroneous operation prevention cover 60 as shown in FIG.
When a force against the elasticity of is applied to move inward, the tool hooking portion 43 of the connecting member 40 can be exposed, and a tool such as a spanner can be hooked there.
It should be noted that in order to prevent the erroneous operation prevention cover 60 moved inward and the lower portion 35 of the handle 35 from interfering with each other when the gas cock 1 is closed, the lower portion 35 of the handle 30 in FIG.
In a portion where the erroneous operation prevention cover 60 overlaps, a part of the bottom surface of the lower portion 35 of the handle 30 is recessed, similar to the recess provided in the collar portion 33 in the first embodiment.

Further, when the gas cock 1 is in the open state, as shown in FIGS. 8 and 9, the bulging portion 35a of the handle 30 hooks the end face of the erroneous operation preventing cover 60, and the inner side of the erroneous operation preventing cover 60 is closed. The movement of the connecting member 40
It is not possible to expose the tool hanging portion 43 of No.

When opening the gas cock 1,
After the erroneous operation prevention cover 60 is pulled out to a position where it does not overlap with the handle 30 in plan view, the erroneous operation prevention cover 60 can be rotated by rotating the handle 30 even if the operator releases the hand from the erroneous operation prevention cover 60. Lower part 3
It is pushed by the outer peripheral surface of 5 and moves outward.

Also in this embodiment, since the connecting member 40 is rotatably supported by the gas cock body 10, the gas appliance can be directly connected to the gas cock 1 as in the first embodiment. it can.

In addition, in the gas cock 1 according to the second embodiment, the supporting portion 14 of the gas cock body 10 does not have the small-diameter pipe portion 15, and the seal ring 51 is the gas cock body 1.
The retaining ring 50 provided between the inner peripheral surface of the thick portion 16a of the large diameter pipe portion 16 of 0 and the outer peripheral surface of the small diameter portion 41 of the connecting member 40 is the large diameter pipe portion 16 of the gas cock body 10. The connecting member 4 disposed between the inner peripheral surface of the thin portion 16b and the outer peripheral surface of the large diameter portion 42 of the connecting member 40 in FIG.
Although the tool hooking portion 43 of 0 has a small structural difference such as having a substantially rectangular cross section, as described above, it has the same effect as the gas cock 1 of the first embodiment.

The present invention is not limited to the above-mentioned embodiment and various modes can be adopted. For example, the lock portion of the handle is not limited to the shape of the embodiment, and it goes without saying that various other shapes can be adopted. Further, the sliding surface between the gas cock body and the connecting member may be coated with a resin having an extremely small coefficient of friction such as a fluororesin to improve the sliding. Further, in the gas cock of this embodiment, the gas inflow passage and the gas outflow passage provided in the gas cock main body are arranged so as to intersect with each other, but these passages may be arranged in a substantially straight line. . Furthermore, the shape of the plug is not limited to the shape of the above-described embodiment, and it goes without saying that it may be a spherical shape or another shape.

[0038]

As described above, in the invention according to claim 1, the connecting member is rotatably supported in the sealed state on the gas cock body, and the end portion of the connecting member communicates with the gas outflow passage of the gas cock body. Since a screw hole is provided and the outer peripheral surface of this end is used as a tool hanging portion, the gas appliance can be directly connected to this gas cock, and the gas cock is rotated with respect to the gas appliance even after the connection. It has an excellent effect that it can. In the invention according to claim 2, an erroneous operation prevention cover capable of covering the tool hooking portion of the connecting member is attached to the support portion for the connecting member in the gas cock body so as to be retractable, and the handle is provided with the lock portion. , The lock portion is located outside when the gas cock is in the open state, and engages with the erroneous operation prevention cover that covers the tool hanging portion and prevents the erroneous operation prevention cover from moving inward. As a result, when the gas cock is open, the erroneous operation prevention cover cannot be moved inward to expose the tool hook of the connecting member, and the connecting member cannot be loosened.Therefore, you can remove the gas appliance from the gas cock with the gas cock open. It has an excellent effect that it is possible to prevent an accident such as removing the gas and leaking gas. In the invention according to claims 3 to 5, the airtightness of the cylindrical sliding surface provided between the gas cock body and the connecting member is enhanced, and therefore the safety is significantly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a gas cock according to a first embodiment of the present invention in a closed state.

FIG. 2 is a plan view of the same embodiment.

FIG. 3 is a half sectional side view of the same embodiment.

FIG. 4 is a longitudinal sectional view of an essential part corresponding to FIG. 1 showing an open state.

FIG. 5 is a plan view corresponding to FIG.

FIG. 6 is a longitudinal sectional view of an essential part showing a gas cock according to a second embodiment of the present invention in a closed state.

FIG. 7 is a plan view of the same embodiment.

FIG. 8 is a longitudinal sectional view of an essential part corresponding to FIG. 6 showing an open state.

FIG. 9 is a plan view corresponding to FIG.

[Explanation of symbols]

 1 gas cock 10 gas cock main body, 11 gas inflow passage 12 gas outflow passage 14 support portion 20 stopper 30 handle 33 collar portion (lock portion) 35a bulging portion (lock portion) 40 connecting member 43 tool hook portion 44 screw hole 60 erroneous operation prevention cover

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Yoshizaki 109-1 Shinmachi, Joetsu City, Niigata Prefecture Koyo Sangyo Co., Ltd.

Claims (5)

[Claims] 1. A plug is rotatably accommodated in a gas cock body, and by rotating the plug through a handle, a gas inflow passage to which a flexible hose is connected and a gas outflow passage to which a gas appliance is connected are formed. In a gas cock that communicates and is cut off, a gas appliance is screwed into one end and has a screw hole that communicates with the gas outflow passage of the gas cock body, and the outer peripheral surface of the one end is used for a tool such as a spanner. A gas cock, wherein the other end of the connecting member is a rotatably supported by the gas cock body in a sealed state. 2. The gas cock according to claim 1, comprising the following (a) erroneous operation prevention cover and (b) lock part. (B) It is attached to the support portion for the connecting member in the gas cock body so as to be able to project and retract, and when it protrudes outward, it covers the tool hook of the connecting member to make it impossible to hook the tool, and when it sinks inward, the tool A misoperation prevention cover that exposes the hanging part and allows tools to be hooked. (B) When the gas inflow passage and the gas outflow passage of the gas cock body are communicated with each other, the erroneous operation preventing cover is engaged with the erroneous operation preventing cover that protrudes outward to prevent the erroneous operation preventing cover from moving inward. A lock portion provided on the handle, which is disengaged from the erroneous operation prevention cover when the inflow passage and the gas outflow passage are blocked. 3. A cylindrical sliding surface is formed between the gas cock body and the connecting member, lubricating oil is injected between the sliding surfaces, and a seal is formed between the sliding surfaces by an oil film of lubricating oil. The gas cock according to claim 1 or 2, wherein the gas cock is provided. 4. The gas cock according to claim 3, wherein the diameter difference between the two sliding surfaces is 50 μm or less, and silicone oil is used as the lubricating oil. 5. The gas cock according to claim 3, wherein the diameter difference between the two sliding surfaces is 100 μm or less, and grease is used as the lubricating oil.