JPH09178003A - Gas cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the generation of malfunction such as a leak of gas from a detecting plug due to the wrong operation at the time of removing a screw closure of a detecting plug in a gas cock, in which a detecting plug provided in a main body of a gas cock and a gas circuit are communicated with each other and while the detecting plug is closed by a disconnectable screw closure. SOLUTION: A stopper device for limiting the angle of rotation of an operating shaft 20 of a plug 2 in a fixed range from a cock full-opening position to a full closing position in the normal condition is provide. This stopper device is formed into the structure that a stopper function is released by inserting a shaft part 32 into a fitting hole part 31 provided in a member to be integrally moved with the operating shaft 20, and the shaft part 32 is provided in the tip of a screw plug 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cock, and more particularly to a gas cock having a pressure detecting plug of a gas circuit to which the gas cock is connected.

[0002]

2. Description of the Related Art As this type of gas cock, a gas cock connecting portion is provided at both ends and a connecting plug for pressure detection is provided on a side wall of a closed housing portion of a so-called intermediate cock type gas cock body. It is disclosed in Japanese Patent No. 11478.
In this structure, an auxiliary hole for detecting pressure is formed in the closing member so as to communicate with the passage hole for gas circuit, and this is connected to the connecting plug for detecting pressure.

In normal use, the connection plug for pressure detection is closed by a screw plug, and there is no fear of gas leakage to the outside even if the flow passage in the gas cock and the connection plug for pressure detection are in communication. On the other hand, at the time of pressure detection, the closing position is set so that the upstream side of the gas circuit and the connection plug for pressure detection are communicated with each other through a passage hole in the closure, and the pressure is detected by the connection plug for pressure detection. The rubber tube of the pressure device is connected, and the pressure of the gas circuit on the upstream side can be detected.

[0004] For example, when the gas cock is provided in the indoor pipe, if the meter cock at the upstream end of the indoor pipe is closed, the presence or absence of gas leakage in the entire indoor pipe can be detected by the pressure detection. However, in this conventional apparatus, when the gas cock closeer is set at the above-described pressure detection position and the inside of the pressure detection connection plug and the upstream side of the gas cock communicate with each other, if the screw stopper is removed, ,
There is an inconvenience that gas leaks from the connection plug for pressure detection.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and it is described as follows. In the passage hole (21) of the closure (2) housed in the main body (1), the upstream side of the closure (2) and the pressure detecting plug (12) are blocked with the flow passage to the downstream side blocked. Auxiliary hole (22) for connecting and is formed,
Gas plug in which the pressure detecting plug (12) is detachably closed with a screw stopper (13) '', the pressure detecting plug (12)
It is an object of the present invention to eliminate the inconvenience of gas leakage from the pressure detection plug (12) due to an erroneous operation when the screw plug (13) is removed.

[0006]

[Means for Solving the Problems] The technical means of the present invention for solving the above-mentioned problems is to: A stopper device (3) is provided to limit the movement to a certain range up to a certain range. ) Is inserted so that the stopper function is released, and the shaft (3
2) was provided at the tip of the screw plug (13).

The above technical means operates as follows. During normal use, the screw plug (13) is still attached to the test plug (12), and the stopper (3) operates the stopper (2) within a certain range from the fully open position to the fully closed position of the cock by the action of the stopper device (3). It is opened and closed.

[0008] In the case of gas leak inspection, etc., first, a screw plug (1
3) Remove the stopper.At this time, since the stopper device (3) performs the stopper function,
(2) cannot be rotated. In this state, a rubber tube or the like is connected to the pressure measuring plug (12), and the shaft (32) provided at the tip of the removed screw plug (13) is pushed into the fitting hole (31). The stopper function of (3) is released. Thus, the closing member (2) can be rotated to a position beyond a certain range from the fully open position to the fully closed position. As a result, when the circuit on the upstream side of the closet (2) and the inside of the pressure detection plug (12) are set to be in communication (gas circuit pressure detection state), the pressure detection plug (1
With the pressure detector connected to 2), it is possible to inspect the pressure change of the circuit on the upstream side of the closing member, and it is possible to inspect the occurrence of gas leakage and the like.

[0009]

EFFECT OF THE INVENTION The screw plug (13) is removed and the shaft portion (32) thereof is removed.
Since the gas circuit pressure detection state is set by fitting the plug into the fitting hole (31), the screw plug (13 It is possible to prevent inconvenience that gas leaks from the pressure detection plug (12) due to the removal of ().

[0010]

Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, the gas cock of this embodiment is a so-called intermediate cock having threaded portions for connecting gas pipes at both ends. The pressure sensing plug (12) protrudes sideways from the body, and its open end has this pressure sensing plug.
It is closed by a screw plug (13) screwed to (12).

As shown in FIGS. 4 and 5, the main body (1) has a tubular portion (10) connected to the upper portion of the closing container (11), and is fixed from an open end of the tubular portion. Engagement grooves (1
4) are formed, and a pair of notches (15) and (15) having a fixed width reaching below the engagement groove (14) are formed by the diameter line of the cylindrical portion (10) (the inlet of the main body (1)). (Diameter line in the direction orthogonal to the straight flow path from the to the outlet). And, in one notch (15), an excision area (16) is formed by excision of the upper end of the cylindrical part (10) over a range of 90 degrees, and the bottom surface (17) of this excision area (16) is It is located above the engagement groove (14).

As shown in FIGS. 4 and 6, the screw plug (13) is connected to the shaft (3) from the tip of a screw formed following the head.
2) has a protruding configuration, a sealing packing (P) for sealing is externally fitted to the screw portion, and an annular groove formed in the head portion includes:
The annular part (4) of the connector (4) made of a flexible synthetic resin material
1) is fitted outside. Therefore, when the screw plug (13) is screwed into the plug for detection (12), these packings (P) are clamped between the head thereof and the end face of the plug (12) for detection and sealed.

The tip of the connecting member (4) is a key-shaped projection.
(42), which is attached to the through hole of the tongue protruding from a part of the main body (1) so as not to be pulled out, and a predetermined space is provided between the key-shaped projection (42) and the annular portion (41). They are connected by a thin linear portion (43). The closing member (2) has a through hole (21) for linearly connecting the inlet side and the outlet side of the main body (1), and an auxiliary hole (22) orthogonal to the through hole and smaller than the through hole (21). Are formed. At the upper end of the operating shaft (20) of this closing piece (2),
The angular shaft portion (23) is engaged with the clutch plate (5) in a paired state. Therefore, the body
The clutch plate (5) is vertically movable up and down with respect to the operating shaft (20) of the closing member (2) accommodated in (1), but has a relationship of rotating integrally with the closing member (2).

As shown in FIG. 4, the clutch plate (5) has a shaft portion (53) projecting upward from the center of the disk portion (51).
A cut shaft (54) having a parallel surface portion protrudes from the tip of the shaft portion. Further, a slit (52) having a constant width is formed along the diameter line of the disk part (51), and the cutting direction of the slit (52) and the direction of the parallel plane part of the cut shaft (54) are aligned. Are matched. A notch (55) is formed at a position perpendicular to the slit (52).

A stopper ring (33) is disposed below the clutch plate (5) and is fitted onto the operating shaft (20) of the closure (2),
An upright piece (34) provided on the stopper ring (33) fits into the cutout (55). When the clutch plate is assembled in the main body (1), a spring (24) is interposed between the stopper ring (33) and the upper end surface of the closing member (2).
(5) and the stopper ring (33) are urged in the ascending direction.

On the other hand, a locking plate is provided on the upper surface of the clutch plate (5).
(6) is provided. The locking plate (6) has a shape in which a pair of protruding tongue pieces (61) and (61) are arranged on the diameter line from the annular main body, and the central opening is the shaft part (53). Is formed in a size large enough to allow loose fit. In this type of gas cock, as shown in Fig. 5, the closure (2) is
(1), and insert the spring (2) from above.
4) is fitted over the operating shaft (20), and a stopper ring (33) and a clutch plate (5) are mounted thereon in the order shown in FIG. 4 and a locking plate is mounted on the upper surface of the clutch plate (5). (6) and push them in with the locking plate (6) attached to the main body (1).
Located below the engagement groove (14) provided in the upper end cylindrical portion of
When a C-shaped locking ring (R) is mounted in the engagement groove (14), these parts are mounted in a retaining state. In this state,
The engaging plate (6) is positioned with respect to the cylindrical portion (10) by the fitting of the protruding tongue piece (61) and the notch (15). It is in a state of contact.

An operation knob (7) is provided on the clutch plate (5).
Are fitted to the cut shaft (54) in a state of preventing relative rotation and are mounted and fixed by screws. And this operation knob
When the knob (71) protruding in a straight line of (7) is orthogonal to the axis of the main body (1) as shown in Fig. 1, the closure (2)
Are set to the fully closed position (the state shown in FIG. 9B).

As shown in FIGS. 4, 7, and 8, the operation knob (7) includes an L-shaped movable claw (35) serving as one of the stopper devices (3) and this movable claw (35). A leaf spring (36) for urging the outside (35) is built in. The movable claw (35) is built in the cavity (71) of the operation knob (7), which is formed inside the downwardly open cavity formed inside the knob (71) so as to be horizontally movable, and has a bent tongue piece (37) at the lower end thereof. Protruding inward. This movable claw (35)
Is located in the cut-off area (16) of the cylindrical portion (10) in the assembled state. Since the leaf spring (36) is constantly urged outward, the upright piece of the movable claw (35) closes the one side wall (18) of the resection area (16) when the child (closed). 2) is in the fully closed position, and the state in contact with the other side wall (19) is the closed position.
It becomes the fully open position of (2).

A fitting hole (31) is opened in the side wall of the knob (71) facing the upright piece of the movable claw (35), and the size of the fitting hole (31) is determined by a screw. Shaft (3) provided at the tip of stopper (13)
2) is set to the size that can be inserted just. Further, the movable range of the movable claw (35) is set in relation to the thickness of the cylindrical portion (10) following the resection area (16), and when the movable claw (35) is pushed inward by the shaft portion (32), FIG. 12A and the lower end of the movable claw (35) is located on the inner peripheral side of the cylindrical portion (10).

Therefore, in this embodiment, in the assembled state, when the operation knob (7) is set to the fully closed position (FIG. 1), one side of the lower portion of the movable pawl (35) is a side wall ( 1
8), and from this state counterclockwise 90
Once rotated, the other side of the movable pawl (35) will be the side wall of the resection area (16).
Contacting (19), the closure (2) is in the fully open state (state (A) in Fig. 9). As described above, in this embodiment, the combination of the movable claw (35) and the excision region (16) of the tubular portion (10) functions as the stopper device (3) described above.

The screw plug (13) is removed from the normal state, and the shaft (32) of the screw plug (13) is inserted into the fitting hole with the rubber plug or the like for detection being connected to the plug (12) for detection. When pushed into the (31), the lower part of the movable claw (35) is pushed inward as described above, and is located on the inner peripheral side of the cylindrical portion (10). As a result, the stopper device (3) having the above configuration is brought into the stopper function released state. In order to facilitate this release operation, as shown in FIGS. 7 and 8, when the operation knob (7) is in the assembled state,
The bent tongue piece (37) of (35) is accommodated in a sliding concave part (72) formed in the cavity of the operation knob (7) in a paired state, and the area above the bent tongue piece (37) is Is housed in the cavity in a free state.

In addition to the method in which the stopper function is released by such a horizontal movement, the movable claw (35) is configured to swing about its upper end as a fulcrum.
The movable claw (35) is located at the inner periphery side of the cylindrical portion (10) when the lower portion of the movable claw (35) is pushed in. Can also be adopted.

In this embodiment, a pushing and turning mechanism is adopted as an operating mechanism of the gas cock. For this reason, the locking plate (6)
The opening at the center of 4 is the largest 4 as shown in Figs.
A part surrounded by the first arc (62) of the one-half arc, a part surrounded by the second arcs (63) (64) of smaller arcs, and a part surrounded by the smallest third arc (65) Consists of.

Then, at the fully closed position of the closing member (2), one side of the upright piece (34) of the stopper ring (33) comes into contact with one side (66) of both ends of the first circular arc (62) in a counterclockwise direction. . By the action of the stopper device (3) described above, the opening / closing rotation is performed in a range rotated 90 degrees in the counterclockwise direction from this state. The upper surface of the plate (5) is in contact with the locking plate (6) and the upright piece (34)
And the one side (66) are in contact with each other, so that the counterclockwise rotation is prevented. In this state, when the operating knob (7) is depressed by a certain stroke, the tip of the upright piece (34) is located below the locking plate (6), and the operating knob (7) is turned while maintaining this state. When rotated clockwise, the closing member (2) can be rotated to the fully open position.
In this way, a pushing mechanism is realized. In this pushing state, the bending tongue (37) provided at the lower end of the movable claw (35) approaches the bottom surface (17) of the excision region (16), so that it does not come into contact with it. The excavation depth of this excision region (16) is set to a predetermined depth. That is, the cutting depth is set slightly deeper than the lowest position of the bent tongue piece (37) when the operation knob (7) is pushed in.

In this embodiment, when the closure (2) is rotated 90 degrees clockwise from the fully closed position, as shown in (C) of FIG. The holes (22) are aligned with each other. Thereby, it is possible to perform the pressure detection in a state where the upstream side and the downstream side of the gas cock communicate with each other. Then
From this state, when it is rotated clockwise by a fixed angle (75 degrees) to the state of FIG. 9D, the upstream side of the gas cock and the auxiliary hole (22) are set to communicate with each other. Needless to say, in order to set these positions (positions (C) and (D) in FIG. 9), the stopper device (3) is set to the stopper function released state by the procedure described above. In this case, a stopper mechanism is adopted to enable accurate positioning of the closure (2) at this time.

For this reason, as shown in FIG.
On the upper surface of the disk portion (51) of (5), a pin (56) is projected from the radius of the second circular arc (63) (64) to the inner peripheral portion. FIG. 1 shows the relationship between the pin (56) and the steps at both ends of the third arc (65).
The relationship shown in FIG. When閉子(2) is in the fully closed state, in the pin (56) is 10, as indicated by a solid line located at a point (S _1), as shown in phantom in FIG. 12-a and FIG. 7 Then, the shaft (32) of the screw plug (13) is pushed into the fitting hole (31) so that the movable claw (35) is positioned inside the cylindrical portion (10). after moving in the direction, while being positioned to the remove the screw plug (13) (S ₁₎ was 90 degrees rotation in a clockwise direction from the point of the pin to a point (S ₂₎ (56) ( In Fig. 12-b), the closing element (2) is in the combustion pressure detection state (Fig. 9-
(C)), and the set in a position of coming in contact with the stepped portion of the end and (65a) a pair of causing further 75 ° rotation in a clockwise direction when the pin (56) is a third circular arc (65) (S ₃₎ State (see Fig. 12-c)
And this position becomes the primary side pressure detection state (FIG. 9- (D)).

In the combustion pressure detection state, the knob (71) of the operation knob (7) is aligned with the axial direction of the main body (1). ) Can be determined to be in the combustion pressure detection state (FIG. 9- (C)). Child
When (2) is in the primary pressure detection state (FIG. 9- (D)), the position of the knob (71) is slightly inclined from the horizontal position. (56) and the third arc (65)
This positioning is assured by the contact of the one end with the step (65a).

When the closing member (2) is rotated from the fully closed position to the previous position, the pin (56) is connected to the other step of the third circular arc (65).
Although the moving in (65b) side, the angle from (S ₁₎ of points to said stepped portion, because are made to correspond to the angle to the fully open position from the fully closed position of閉子, the pin (56 ) Does not hinder the opening and closing rotation during normal operation. Shaft (32) and fitting hole (31)
In this embodiment, the screw plug has a circular cross section. However, as shown in FIG. 11, if the cross section is set to a T-shaped cross section or a complicated cross section other than this, the screw plug (13) Since the stopper device (3) cannot be set to the stopper function released state by a member other than the shaft section (32) of the above, it may be set to the combustion pressure detection state or the primary pressure detection state due to mischief, etc. There is no. Further, in the above embodiment, the fitting hole (31) is provided in the operation knob (7), but
It is needless to say that the fitting hole portion (31) may be provided in another portion that rotates integrally with (2), and the stopper device (3) may have a configuration other than the above-mentioned embodiment. . For example, a pin housed in the operation knob (7) so as to be slidable in the horizontal direction and urged in the protruding direction exerts a stopper function in relation to the cylindrical portion (10). Alternatively, the stopper function may be released by pressing the button.

In the above embodiment, when the combustion pressure is detected (FIG. 9 (C)), the upright piece (34) moves the upright piece (34) to the other side (67) of the first arc (62) of the locking plate (6). Since it is in contact with, the positioning of this combustion pressure detection state is reliable. Further, when the closure (2) is rotated from this position to the primary pressure detection state ((D) in FIG. 9), the push-and-turn operation is performed as in the case of the normal opening / closing operation. As a result, the upright piece (34) is locked by the locking plate (6).
It is pushed downwards and can be moved clockwise relative to the other side (67). Then, when the primary pressure detection state is reached, as shown in FIG.
As shown in 2- (c), the upright piece is positioned below the outer periphery of the second arc (63) of the locking plate (6), and the pin (56) and the stepped portion are located.
Positioned by contact with (65a).

As described above, even when operating from the combustion pressure detection state to the primary pressure detection state, the pushing operation is required, so that an erroneous operation in this case can be reliably prevented. Also, in this embodiment, the height of the pin (65) is set sufficiently high,
When pushing and turning the clutch plate (5), the upper end of the clutch plate (5) should be located above the locking plate even when the clutch plate (5) is pushed in for a certain stroke. 56) and the step (65b) are in contact with each other. Therefore, even if the movable plate (35) is pushed in by the shaft portion (32) of the screw plug (13) when the closure (2) is in the fully open position, the closure (2) is moved further clockwise. Since it cannot rotate, erroneous operation can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a front view thereof.

FIG. 3 is a side view thereof.

FIG. 4 is an exploded view of the embodiment of the present invention.

FIG. 5 is a sectional view thereof.

FIG. 6 is a detailed view of a plug (12) for test pressure and a screw plug (13).

FIG. 7 is a detailed view of the stopper device (3) in a state where the operation knob (7) is pushed into the cylinder portion (10).

FIG. 8 is an XX cross-sectional view of a main part.

FIG. 9 is a diagram showing the relationship between the closing member (2), the main body (1) and the knob (71) at each operation position.

FIG. 10 is a diagram showing the relationship between the locking plate (6) and the pin (56).

FIG. 11 is an explanatory view of another cross-sectional shape of the fitting hole (31) and the shaft (32).

FIG. 12 is a diagram showing the relationship between the cylinder (10), the pin (56), and the movable pawl (35) and the locking plate (6).

[Explanation of symbols]

 (1) ・ ・ ・ Main body (11) ・ ・ ・ Closer housing (12) ・ ・ ・ Plug for measuring pressure (2) ・ ・ ・ Closer (21) ・ ・ ・ Pass hole (22) ・ ・ ・ Auxiliary hole (13) Screw plug (20) Operation shaft (3) Stopper device (31) Fitting hole (32) Shaft

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[Procedure amendment]

[Submission date] January 31, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004] For example, when the gas cock is provided in the indoor pipe, if the meter cock at the upstream end of the indoor pipe is closed, the presence or absence of gas leakage in the entire indoor pipe can be detected by the pressure detection. However, in this conventional device, the pressure detection mode in the state where the gas cock closure is set to the pressure detection position is limited, and for example, the first state (apparatus in which the upstream side and the downstream side of the gas cock are communicated The operation for setting the pressure detection state during combustion) and the second state for detecting the pressure only on the upstream side of the gas cock was troublesome.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and "The gas flow passage is linearly formed through the main body (1) of the gas cock and is provided in the gas flow passage. A pressure detecting plug (1) communicating with an intermediate position of the opening end of the gas flow path is provided on the side wall of the closed container (11).
2) is provided, and in the closure (2) housed in the main body (1), the upstream side or the downstream side of the closure (2) and the pressure detection plug ( 12) is formed with an auxiliary hole (22) for communicating with and through a passage hole (21) formed in the closure (2), and the pressure detecting plug (1)
2) is a gas cock in which the screw cock (13) is removably closed, and in a first state (a pressure detection state at the time of burning the instrument) in which the upstream side and the downstream side of the gas cock communicate with each other and the upstream side of the gas cock. It is an object of the present invention to easily perform the operation for setting the only pressure to the second state for detecting the pressure.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

The technical means of the present invention for solving the above-mentioned problems are as follows: "The closing direction rotation at the fully closed position of the operating shaft (20) of the closure (2) in the normal use range. A stopper device (3) for preventing movement and releasing the blocking by a predetermined operation is provided, and the blocking is released by operating the stopper device (3), and the closing is performed by the operating shaft (20). When the child (2) is rotated from the fully closed position to outside the normal use area, the auxiliary hole (2
2) corresponds to the pressure detecting plug (12) and the through hole (2
The first state in which 1) communicates with the upstream and downstream gas channels in the main body (1), and the upstream gas channel by the auxiliary hole (22) and the passage hole (21). The size of the diameter of the passage hole (21) and the diameter of the auxiliary hole (22) and the pressure detection plug so that the pressure detection plug (12) can be set in a second state in which only the pressure detection plug (12) communicates. The size of (12) is set so that the first state is a state where the closure (2) is rotated 180 degrees from the fully open position, and the second state is when the closure (2) is It is a state of being rotated by a certain angle from the first state ”. Here, the "close direction rotation" is "rotation in the direction from the fully open position to the fully closed position" and is not limited to the rotation in the normal use range between the fully open position and the fully closed position, and is not limited to the ground. Even in the rotation range of, the rotation in the above-mentioned direction is referred to as "closed rotation". This also applies to the claims.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

The above technical means operates as follows. During normal use, the operation of the operating shaft (20) within a certain range from the cock fully open position to the fully closed position by the action of the stopper device (3)
Thus, the closing member (2) is opened and closed.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

When inspecting for gas leaks, the screw plug (13) is first removed, and at this time, the stopper device (3).
Has a stopper function, the closure (2) can be rotated only within the operating range. In this state, a rubber tube or the like is connected to the pressure detection plug (12) and the stopper device (3) is operated to release the so-called stopper function that prevents the closing direction rotation at the fully closed position. The closure (2) can be rotated to a position beyond a certain range from the position to the fully closed position. As a result, when the closure (2) is set in a state (gas circuit pressure detection state) where the circuit on the upstream side or the downstream side of the closure (2) and the inside of the pressure detection plug (12) communicate with each other, the pressure detection plug ( By means of the pressure detection device connected to 12), the pressure change in the circuit upstream of the closure can be inspected, and it is possible to inspect the presence or absence of gas leakage. In the above technical means, the pressure detection plug (12) communicates with the upstream side and the downstream side of the closure (2) by setting the first state, so that a so-called combustion pressure detection state is achieved. . Then, by changing from this state to the second state, the upstream side of the closure (2) and the pressure detection plug (12) communicate with each other, which is a so-called primary side pressure detection state. The first state is a state in which the closing member (2) is rotated 180 degrees from the fully open position, and therefore the fact that the first state has been set is the operation knob attached to the operation shaft (20). You can definitely judge by the posture.
Since the first state is the state rotated by a certain angle from this state, it is easy to determine that the operation to the first state is performed.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

EFFECTS OF THE INVENTION By releasing the stopper function of the stopper device (3), the closure (2) can be rotated from the fully closed position to outside the normal use range, and the operation shaft (20) can be operated. Since it is possible to set the first state and the second state by the above, it is possible to prevent the careless setting of the pressure detection state and to easily perform the operation of setting the first state and the second state. . Further, since the first state is the state opposite to the fully opened position, this first state is easy to discriminate. Therefore, the determination of the second state is easy. In addition,
"In the second state, the closure (2) is set to a state further rotated by an angle of 75 degrees from the first state"
In the case of (refer to claim 2), since the posture of the operation knob in the second state is an oblique posture, it is easy to judge that the operating knob is in the second state. In addition, "a stopper is provided separately from the stopper device (3) for preventing further rotation in the closing direction when the second state is further rotated in the closing direction from the first state" ( Claim 3
In (1), since the stopper stops at a predetermined position when rotating to the second state, the positioning in the second state is reliable. There is no need to worry about incorrect positioning.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

When the closure (2) is rotated from the fully closed position to the fully open position, the pin (56) moves to the other step (65b) side of the third arc (65). But, (S
_Since the angle from the point ₁ ) to the stepped portion corresponds to the angle from the fully closed position to the fully opened position of the closure, this pin (56) does not hinder the opening / closing rotation in the normal state. Although the shaft portion (32) and the fitting hole portion (31) are set to have a circular cross section in this embodiment, they may be set to have a T-shaped cross section as shown in FIG. If a complicated cross-sectional shape is set, the stopper device (3) cannot be set to the stopper function released state by members other than the shaft portion (32) of the screw plug (13), so that the combustion pressure detection state is set by mischief or the like. Or set to the primary pressure detection state. Further, in the above-mentioned embodiment, the fitting hole portion (31) is provided in the operation knob (7), but the fitting hole portion (31) is provided in the other portion which rotates integrally with the closure (2). Needless to say, the stopper device (3) may have a structure other than the above-mentioned embodiment. For example, a pin that is slidably accommodated in the operation knob (7) in the horizontal direction and biased in the protruding direction exerts a stopper function in relation to the tubular portion (10), and this pin is used as the shaft portion (32). Alternatively, the stopper function may be released by pushing in.

Claims (2)

[Claims] A closed housing (11) of a body (1) of a gas cock.
A pressure detection plug (12) is provided on the side wall of the valve (2), and the passage (21) of the valve (2) accommodated in the main body (1) is closed in a state where the flow path to the downstream side is shut off. ) And the plug for measuring pressure (12)
In the gas cock in which an auxiliary hole (22) for communicating and connecting the pressure sensor is formed and the plug for measuring pressure (12) is removably closed with a screw plug (13), the operation shaft (20) of the closet (2) is connected. A stopper device (3) is provided to limit the normal rotation angle to a certain range from the cock fully open position to the cock fully closed position.
(3) is a fitting hole provided in the member that moves integrally with the operation shaft (20).
A gas cock having a structure in which the stopper function is released by inserting the shaft portion (32) into the (31), and the shaft portion (32) is provided at the tip of the screw plug (13). 2. The gas cock according to claim 1, wherein the shaft (32) is a shaft having a modified cross section, and the cross-sectional shape of the fitting hole (31) is a modified cross section adapted to the shaft.