JP2001173839A - Inspection implement of slide type gas valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection implement capable of certainly detecting returning abnormality of a slide valve which is constantly energized in the valve closing direction in the slide type gas valve serially integrated with a plug part on which a socket is installed free to connect and disconnect to and from it. SOLUTION: This inspection implement is constituted of a socket part 1 in which a connecting mechanism free to connect and disconnect like a socket and advancing and retreating shafts 21, 22 built in it free to advance and retreat and energized toward the connecting side (one side) with a plug part, an end part of one 21 of the advancing and retreating shafts is at a position to be inserted into the plug part, the advancing and retreating shafts 21, 22 are at specified setting positions in a non-contact state of the socket part 1 with a gas valve, size of energizing force of the advancing and retreating shafts 21, 22 and their advancing and retreating loci are set so as to be projected in the other direction by a specified distance from the aforementioned set position at the time when the slide stopper connects the socket part 1 to the plug part at the normal valve closing position, and it is constituted so that the above advancement and retreat can be seen from outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection tool for detecting an abnormal return of a slide plug (abnormal valve closing) of a slide gas plug containing a slide plug normally biased in a closing direction. is there.

[0002]

2. Description of the Related Art As one of the devices using a flexible tube connecting device using a coupling device, a gas plug which enables one-touch mounting is known. This type of gas stopper (39) is shown in FIG.
As shown on the right side of the figure, the plug part (3) protrudes from the cock body (31) communicating with the gas passage (34), and the outer peripheral end of the plug part (3) has an annular concave groove (30). Is formed. In addition, a lift valve (37) and a slide plug (38) following the lift valve (37) are built in the gas stopper (39), and the lift valve (37) and the slide stopper (38) are spring-loaded. The plug (3) is urged toward the open end side of the plug (3) by (32) and (33). In other words, the open end of the plug portion (3) is always kept closed by the lift valve (37) biased by the spring (32), and the gas passage (34) is closed by the spring (33). The valve is normally kept closed by the slide stopper (38) urged to the valve. In order to open this type of gas stopper (39), it is generally called a socket (4) having a pressing shaft (40) for pushing the lift valve (37) inward as shown on the left side of the figure. What is necessary is just to connect the connecting tool which is.

A socket (4) is pressed against an end face of a plug (3) and is urged by a spring (42) to the open end side (forward) of the socket (4). A holding cylinder (43) having a built-in cylinder (41), a locking ball (44) provided to penetrate the holding cylinder (43), and an axially slidable with respect to the holding cylinder (43). The reciprocating cylinder (4) which is externally fitted and urged by a spring (45) in a direction to protrude forward from the socket (4).
6). A small-diameter stepped portion (47) is formed on the rear inner peripheral surface of the advance / retreat cylinder (46), and the socket (4) is connected to a gas stopper.
Lock ball (44) without connecting to (39)
Is held by the outer peripheral surface of the rubber cylinder (41), and a part of the locking ball (44) projecting outward from the holding cylinder (43) is accommodated in front of the small diameter step (47). It is configured as follows. That is, the front end face of the small-diameter step portion (47) of the holding cylinder (43) engages with the locking ball (44) from behind, whereby the advance / retreat cylinder (46) is maintained in the non-projecting state. Becomes

When this socket (4) is fitted over the tip of the gas stopper (39) and pushed in, the rubber cylinder (41) is pushed and shrunk by the tip of the plug (3) as shown in FIG. At the same time, when the annular groove (30) of the plug (3) coincides with the position of the locking ball (44), the locking ball (44) is
, And is fitted in the annular groove (30).
At the same time, the engagement of the small-diameter step portion (47) with the locking ball (44) is released, and the advance / retreat cylinder (46) projects forward by the urging force of the spring (45), and the locking ball (44) Outside is pressed by the small-diameter step (47), and the locking ball (44) is
The state engaged with the retaining state at (30) is maintained.

In this state, the lift valve (37) in the plug (3) is pushed inwardly of the gas stopper (39) by the pressing shaft (40) of the socket (4), and the lift valve (37) is pressed. ), The slide stopper (38) is pushed inward, and the gas stopper (39) is opened. As a result, the gas in the gas passage (34) is
Then, the gas is supplied to the gas equipment through the gas rubber tube attached to the socket (4) and the socket (4). To remove the socket (4) from the gas stopper (39), the advance / retreat cylinder (46) is retracted, and the small-diameter step (47) is positioned behind the locking ball (44). Then, the rubber cylinder (4
1) is elastically restored by the urging force of the spring (42), and simultaneously presses the end face of the gas stopper (39), and at the same time, the locking ball (44) is pushed by the end face of the rubber tube (41) to form the annular groove (30). Popped out of the socket
(4) will be removed from the plug (3). In this state, the lift valve (37) and the slide plug (38) return to the closed state by the springs (32) and (33).

[0006]

SUMMARY OF THE INVENTION However, the socket
When the slide plug (38) connected to (4) and opened is returned to the closed state, impurities such as dust are mixed in the plug (3), or the slide plug (38) is The slide stopper (38) may not be returned to a normal state because the slide stopper (38) may be caught halfway without sliding accurately in the plug portion (3).
Even in this case, the open end of the plug (3) is kept closed by the lift valve (37) biased by the spring (32), so that the slide plug (38) is closed due to abnormal return. No valve abnormality can be confirmed from the appearance of the gas stopper (39).

In order to confirm the return abnormality of the slide plug (38), a method is employed in which the slide valve (37) is pushed inward and determined based on the moving distance and the moving load.
Depending on the abnormal stop position of the slide stopper (38) in 9),
The detection method is not uniform and uncertain. Also, in the method of inserting the detection jig into the plug (3), if the slide stopper (38) stops abnormally with the valve open, gas leakage will occur from the plug (3). It is dangerous.

According to the present invention, there is provided a slide-type gas stopper having a built-in slide stopper which is constantly urged in a valve closing direction, which can reliably detect a return abnormality (abnormal valve closing) of the slide stopper. An object of the present invention is to provide a gas stopper inspection tool. [1]

[0009]

Means for Solving the Problems The solution of the present invention taken to solve the above-mentioned problem is as follows: "A sliding gas plug integrated in series with a plug portion to which a socket for connecting a gas hose is detachably connected. An inspection tool for a slide-type gas stopper which detects a return abnormality of a slide stopper which is normally urged in a closing direction by a spring, and which has a socket portion having a detachable connection mechanism similar to the socket. An advancing / retracting shaft which is built in the socket portion so as to be movable forward and backward and is urged toward one side of the socket portion which is a connection side with the plug portion, wherein the advancing / retreating shaft has an end on one side. In a position to be inserted into the plug portion,
When the socket is not connected to the gas tap,
The reciprocating axis is at a predetermined set position, and when the socket is connected to the plug section where the slide stopper is in a normal valve closing position, the reciprocating axis is a predetermined distance from the set position in the socket. The magnitude of the urging force of the advance / retreat axis and the advance / retreat trajectory of the advance / retreat axis are set so that the advance / retreat axis is protruded, so that the advance / retreat of the advance / retreat axis can be seen. "

This inspection tool is for confirming the return abnormality of the slide stopper incorporated in the ordinary slide gas stopper as described above. The socket part can be attached to and detached from the plug part of the gas stopper in the same manner as a normal socket.
When the socket portion is connected to the plug portion of the gas stopper in which the slide stopper is in the normal valve closing position, the reciprocating shaft built in the socket portion moves from a predetermined set position in the socket portion to the position of the socket portion. It protrudes by a predetermined distance to the side opposite to the connection side (one side) to the plug part. Whether or not the user has moved by the predetermined distance from the predetermined setting position can be visually confirmed. When the socket is connected to the plug of the gas stopper in a state where the slide stopper has not returned to the normal state, since the moving distance of the advance / retreat axis from the set position is different from the normal case, the slide stopper is abnormally returned. (Abnormal valve closing) can be detected.

[Item 2] In the inspection tool for a slide-type gas stopper of the invention according to the above item 1, "the portion of the advancing / retracting shaft protruding from the socket portion is housed in an outer case connected to the socket portion. At the same time, it is assumed that a colored portion having a constant width which is continuous in the axial direction is formed at a predetermined position of the advance / retreat axis, and a transparent window having a predetermined width is formed in the outer case so that the inside can be seen through. , The width of the colored portion,
The width is approximately equal to the width of the see-through window, and the setting position is
The one end of the colored portion was substantially coincident with the one edge of the see-through window, and the socket portion was connected to the plug portion where the slide plug was in a normal valve closing position. Sometimes, the advancing / retracting shaft is moved more than the urging force of the first spring urging the slide plug in the closing direction so that the end of the colored portion substantially coincides with the other edge of the see-through window. The biasing force of the second spring biasing toward the socket side is set to be small ", in a state where the socket portion is not connected to the gas stopper, through a see-through window formed in the outer case. Substantially the entire area of the advance / retreat axis that is visible is the colored part. This state is a state in which the advance / retreat axis is at the predetermined set position. When the socket is connected to the gas plug, the urging force of the second spring that urges the advance / retreat shaft toward the socket is smaller than the urging force of the first spring in the gas plug. , The reciprocating axis is
The slide stopper pushes and moves to the other side. Whether or not the slide stopper in the gas stopper has returned to the normal position can be confirmed by determining whether the advance / retreat axis is moved to a position where the colored part is displaced from the see-through window.

[3] In the inspection tool for a slide-type gas stopper of the invention according to the above [1] and [2], the reciprocating shaft includes a first reciprocating shaft having one end built in the socket, and a reciprocating shaft. A second advance / retreat axis, which is connected to the other end of the first advance / retreat axis and is different in color from the first advance / retreat axis, has a boundary between the first advance / retreat axis and the second advance / retreat axis. When the socket is not connected to the gas stopper, only the second advance / retreat axis can be seen from the see-through window when the socket is not connected to the gas stopper. Then, when the socket is connected to the gas stopper in which the slide stopper has returned to the normal position, what can be seen from the see-through window is colored in a color different from the second advance / retreat axis.
Only the forward and backward axes. In this manner, the return state of the slide stopper in the gas stopper can be confirmed from the change in the color seen through the see-through window.

[0013]

According to the inspection tool for a slide gas plug of the present invention, the return state of the slide plug in the gas plug can be detected by confirming the moving distance of the advance / retreat axis. It is possible to easily and surely check for an abnormal return of the slide plug (abnormal valve closing). In addition, since the socket can be externally fitted to the tip of the gas plug and connected in the same manner as a normal socket, it is easy to mount on the gas plug and, in addition, the slide plug is opened. Even in the case where the slide stopper is stopped in the gas stopper as it is, the return abnormality of the slide stopper can be detected without causing gas leakage to the outside.

In the inspection tool according to the second aspect of the present invention, the return abnormality of the slide plug can be detected based on whether the colored portion of the advancing / retreating axis is visible or invisible from the see-through window. There is an effect that it is easier to confirm the return abnormality of the slide stopper due to the tool.

In the inspection tool according to the third aspect of the invention, the return abnormality of the slide plug of the gas plug can be confirmed by the color of the advance / retreat axis seen through the see-through window. In addition, the return abnormality of the slide stopper can be more easily detected.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
Description will be given based on the drawings. As shown in FIG. 1, the inspection tool for a sliding gas tap according to this embodiment includes a socket part (1) that can be externally connected to a plug part (3) of the gas stopper, and a socket part.
(1) and a shaft (2) that is continuous with the shaft. An annular groove (30) is formed on the outer periphery of the tip of the plug (3).

The gas stopper which can be used by the inspection tool of this embodiment may be a slide gas stopper of the type shown in FIG. 4, but in this embodiment, as shown in FIG. A slide gas stopper of a type in which a slide stopper (35) obtained by integrating the lift valve (37) of FIG. 4 with a slide stopper (38) is urged in a valve closing direction by a first spring (33). (49) is adopted.

[Structure of Socket Part (1)] As shown in FIG. 1, the socket part (1) has an appearance in which an advancing and retreating cylinder (16) protrudes from an open end (front end) of the outer cylinder (10). And advance and retreat cylinder (16)
A spring (15) is interposed between the rear end and a base end surface provided at a predetermined position in the outer cylinder (10).
The reciprocating tube (16) is biased in a direction to protrude forward with respect to the outer tube (10). In addition, a small-diameter stepped portion (17) protruding inward is formed in the rear area of the advancing / retreating cylinder (16). A holding cylinder (13) is fitted inside the outer cylinder (10) and the reciprocating cylinder (16). Three through holes (19) near the tip of the holding cylinder (13)
Are formed at equal intervals in the circumferential direction, and locking balls (14) are fitted into the respective through holes (19). still,
The diameter of the locking ball (14) is set to be larger than the thickness of the through hole (19).

A shaft cylinder (23) is formed at the rear end of the holding cylinder (13) to extend into the shaft (2). In addition, holding cylinder (13)
Is made of an opaque resin. Holding tube (1
3), a rubber cylinder (11) is fitted therein.
The metal ring (18) is fitted to the front end of the metal ring (1),
8) The rubber cylinder (11) is urged in a direction to extend forward by a spring (12) interposed between the rear end of the rubber cylinder (11) and the base end of the rubber cylinder (11).

[Configuration of Shaft (2)] The shaft (2)
A first forward / backward shaft (21) and a second forward / backward shaft (22) are connected to a second spring in a front open cylindrical outer case (20) made of transparent resin and connected to the rear of the socket (1). According to (24), the socket part
(1) The structure is biased to the side. The open end side of the outer case (20) is externally connected to the shaft tube portion (23) connected to the rear of the holding tube (13) in the socket portion (1), and the outer case (20) is connected. ), A tubular member (2
5) is fitted outside. The front end of the tubular member (25) is attached so as to be located at a predetermined distance from the rear end of the shaft tubular portion (23), and the opaque shaft is the same as the front end of the opaque tubular member (25). The portion between the rear end of the cylindrical portion (23) and the transparent window (2) provided in the circumferential direction of the outer case (20) and allowing the inside to be seen through is provided.
Functions as 6).

The first advance / retreat axis (21) and the second advance / retreat axis (22) are inserted into a through hole formed at the bottom (27) of the second advance / retreat axis (22). The rear shaft (28) penetrates and is integrated, and the second spring (24) is interposed between the inner surface of the bottom (27) and the inner surface of the bottom of the outer case (20). 2
The reciprocating shaft (22) is urged toward the socket (1) side together with the first reciprocating shaft (21). The first reciprocating shaft (21) and the second reciprocating shaft (21)
The forward / backward axes (22) are colored differently, and in this embodiment, the first forward / backward axis (21) is green and the second forward / backward axis (22) is red. The tubular member (25) is made of an opaque resin colored white, and the holding tube (13) is also made of a whitish resin.

[Regarding the state where the socket (1) is not connected to the gas stopper] The inspection tool according to the embodiment of the present invention in the non-use state where the socket (1) is not connected to the gas stopper, as shown in FIG. Inside the locking ball (14), a metal ring (18) fitted externally to the front end of the rubber cylinder (11)
The small-diameter step portion (17) of the reciprocating cylinder (16) urged forward by the spring (15) has a locking ball from the rear.
(14). As a result,
(16) is prevented from protruding forward by the urging force of the spring (15) by the locking ball (14), and the non-projecting state is maintained with respect to the outer cylinder (10).

The first advancing / retreating shaft (21) and the second advancing / retreating shaft (22) in the shaft portion (2) are in the maximum output state by the urging force of the second spring (24). In this state, a boundary portion (29) between the first advance / retreat axis (21) and the second advance / retreat axis (22) is
(23) The front end of the first reciprocating shaft (21) is located at the front end of the reciprocating cylinder (16) of the socket part (1) while being coincident with or slightly ahead of the rear end of the socket (1). So that the second
The biasing force of the spring (24), the first advance / retreat axis (21) and the second advance / retreat axis (22)
And the width of the see-through window (26) are set in a predetermined dimensional relationship. Thus, only the red second advance / retreat shaft (22) is seen through the see-through window (26) between the white tubular member (25) and the shaft tubular portion (23). The urging force of the second spring (24) is applied to the gas plug that connects the socket (1).
(49) and is set to be weaker than the urging force of the first spring (33) for urging the slide plug (35) in the valve closing direction.

[Regarding the state in which the socket (1) is connected to the gas stopper-1] FIG. 2 shows that the socket (1) is connected to the gas stopper (49) in which the slide stopper (35) is in a normal return state. It is sectional drawing of the said inspection tool which shows the use condition connected. Gas tap (49)
When the plug (3) is inserted into the open end of the socket (1), the distal end of the first reciprocating shaft (21) is slightly inserted into the plug (3) and the slide plug (35) is inserted. Abuts the end face of At the same time, the tip of the plug (3) is
The socket portion (1) is inserted into the holding tube (13) while being in contact with the front end surfaces of (1) and pushing them backward.

Since the biasing force of the second spring (24) is set to be weaker than that of the first spring (33), the first advance / retreat shaft (21)
Pushed by the slide stopper (35), the shaft with the second advance / retreat shaft (22)
It is moved to the back of (2). Further, since the rubber cylinder (11) is elastically deformable, the rubber cylinder (11) is forcibly contracted by being pushed by the distal end surface of the plug (3). When the metal ring (18) of the rubber cylinder (11) is moved rearward from the through hole (19) in the holding cylinder (13), the locking ball (14) fitted in the through hole (19).
Is pushed forward by the small-diameter step portion (17) of the reciprocating cylinder (16), falls inward of the holding cylinder (13), and has an annular concave groove of the plug part (3).
(30) fit inside.

In this state, the engagement between the small-diameter step portion (17) and the locking ball (14) is released, so that the advance / retreat cylinder (16)
By virtue of the urging force of the spring (15), the projection protrudes forward a predetermined distance from the open end of the outer cylinder (10) and the locking ball (14) fits into the annular concave groove (30). The socket part (1) is attached to the tip of the plug part (3) of the gas stopper (49) in such a manner as not to come off. Whether the socket part (1) is securely connected to the plug part (3) can be easily confirmed by the manner of projection of the reciprocating cylinder (16).

To remove the socket (1) from the plug (3), the reciprocating cylinder (16) is forcibly retracted. Holding tube (13)
When the through hole (19) of the rubber cylinder (11) corresponds to the area in front of the small-diameter step (17), the rubber cylinder (11) returns elastically by the urging force of the spring (12), and the locking ball (14) ) Annular groove (30)
At the same time, the socket part (1) is pushed out of the small diameter step part (17) and fitted into the front area, and the socket part (1) comes off the plug part (3). The manner of attaching and detaching the socket part (1) to and from the plug part (3) is the same as the relationship between the plug part of the conventional sliding gas plug and the socket for opening the plug.

When the socket (1) is securely attached to the plug (3) in a retaining state, the first advance / retreat shaft (21) is pushed backward by the slide plug (35), and the second advance / retreat shaft is moved. (twenty two)
The dimensional relationship and positional relationship of each part are set such that the boundary portion (29) with the front end portion of the cylindrical member (25) coincides with the front end portion of the tubular member (25) or is located slightly behind the front end portion. In other words, only the green first advancing / retracting shaft (21) is seen through the see-through window (26) between the white tubular member (25) and the shaft tubular portion (23).

[Regarding the state in which the socket part (1) is connected to the gas stopper-2] FIG. 3 shows a state in which the slide part (35) is returned to the socket part (1) in the abnormal state (abnormal valve closing state). FIG. 50 is a cross-sectional view showing a state where the connection is made to (49).

For example, when the socket part (1) is connected to the gas stopper (49) in which the slide stopper (35) has been stopped for some reason while returning from the valve-open state to the valve-closed state. In the same manner as described above, the reciprocating barrel (16) protrudes forward by the urging force of the spring (15), and the locking ball (14) provided in the holding barrel (13) has the annular shape of the plug (3). Groove (30)
The socket (1) and the plug (3)
The slide stopper (35) is located deeper inside the plug (3) than in the normal case, so that the first advance / retreat shaft (21) ) Is inserted into the plug portion (3) until the distal end of the slide stopper (35) comes into contact with the distal end surface. For this reason, the movement distance of the first advance / retreat axis (21) moving backward by being pushed by the slide stopper (35) is shortened, and the boundary between the first advance / retreat axis (21) and the second advance / retreat axis (22) is reduced. (29) cannot move to the rear of the see-through window (26) provided in the shaft portion (2), and stops within the formation range of the see-through window (26). It will be seen through. That is, both the red second advance / retreat axis (21) and the green first advance / retreat axis (21) can be seen from the see-through window (26). From this state, the slide stopper (35) of the gas stopper (49) can be seen. ) Can be detected. Also, depending on where the boundary portion (29) is visible in the see-through window (26),
The approximate stop position of the slide stopper (35) in (49) can also be estimated.

As the slide stopper (35) incorporated in the gas stopper (49) used in this embodiment, the slide stopper (35) in which the slide stopper and the lift valve are integrated is adopted.
When the return error of (35) occurs, the slide plug (35) is located deeper than the plug (3), so it is easy to find the return error of the slide plug (35) from its appearance, As shown in FIG. 4, in a gas stopper (39) in which a lift valve (37) is urged in a closing direction against a slide stopper (38) by a spring (32), the slide stopper (38) returns. Even in the event of an abnormality, the lift valve (37) is urged by the spring (32) in a direction to close the open end of the plug (3).
The return abnormality of the slide stopper (38) cannot be found.

When the socket (1) of the inspection tool according to the embodiment of the present invention is connected to such a gas stopper (39), the first advance / retreat shaft is connected.
(21) pushes the lift valve (37) inward until it comes into contact with the slide stopper (38).
The backward movement distance of 1) becomes shorter. For this reason, the perspective window (2
From (6), the boundary (29) can be seen, and the slide stopper
(38) Return abnormalities can be found. in this way,
In the inspection tool of the present invention, the inspection tool for detecting a return abnormality of the slide stopper (38) in the gas stopper (39) having the lift valve (37) urged in the closing direction by the spring (32) is more used. It can be used more effectively.

In this case, the biasing force of the second spring (24) is
The first spring that biases the slide stopper (38) in the valve closing direction
It is set to be weaker than that of the spring (33) and stronger than the urging force of the spring (32) that urges the lift valve (38) to close the open end of the plug (3). I do. In the inspection tool of the above embodiment, the see-through window (26) formed in the shaft (2) is provided.
Is the range between the opaque cylinder member (25) and the shaft cylinder part (23) continuous with the holding cylinder (13), but the outer case (20) corresponding to the shaft cylinder part (23) When the opaque adhesive tape (48) is wound and adhered to the outer surface as shown by the two-dot chain line in FIG. 1, the existence of the see-through window (26) becomes clearer.

In this inspection tool, the gas stopper (39) or the gas stopper (4
Insert the plug (3) of (9) in the same way as a normal socket.
Since the socket (1) can be attached to the plug (3), the slide stopper (35) or slide stopper (38) should be
Even when the valve is stopped in the open state, the return abnormality of the slide plug can be detected without causing gas leakage to the outside of the gas plug.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an inspection tool for a sliding gas tap according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a use state in which the inspection tool according to the embodiment of the present invention is connected to a gas stopper in which a slide stopper is in a normal return state.

FIG. 3 is a cross-sectional view illustrating a use state in which the inspection tool according to the embodiment of the present invention is connected to a gas stopper in which a slide stopper returns and is in an abnormal state.

FIG. 4 is an explanatory view of a non-connected state of a conventional slide gas stopper and a socket connected thereto.

FIG. 5 is an explanatory view of a state in which the slide gas tap and the socket of FIG. 4 are connected.

[Explanation of symbols]

 (1) ・ ・ ・ ・ ・ ・ ・ ・ Socket (16) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Advancing / retracting cylinder (2) ・ ・ ・ ・ ・ ・ ・ ・ Shaft (20) ・ ・ ・ ・ ・ ・ ・ ・Outer case (21) ········· 1st advance / retreat shaft (22) ·········································· 2nd spring (26) ·・ ・ ・ ・ ・ ・ ・ Transparent window (33) ・ ・ ・ ・ ・ ・ ・ ・ First spring (35) ・ ・ ・ ・ ・ ・ ・ ・ Slide stopper

Claims (3)

[Claims] 1. A return abnormality of a slide plug, which is built in a slide gas plug integrated with a plug portion to which a gas hose connection socket is detachably connected in series and is normally urged in a closing direction by a spring, is detected. An inspection tool for a sliding gas tap, wherein the socket includes a detachable connection mechanism similar to the socket, and is connected to the plug in the socket so as to be retractable and advanceable in the socket. A reciprocating shaft biased toward one side of the plug, wherein the reciprocating shaft is at a position where the one end is inserted into the plug portion, and the socket portion is connected to the gas stopper. If not,
The reciprocating shaft is at a predetermined setting position, and when the socket is connected to the plug portion where the slide stopper is at a normal valve closing position, the reciprocating shaft is at a predetermined distance from the setting position in the socket. The magnitude of the urging force of the advance / retreat axis and the advance / retreat trajectory of the advance / retreat axis are set so as to protrude toward the slide axis. Inspection tools. 2. The inspection tool for a slide-type gas stopper according to claim 1, wherein a portion of the advancing / retracting shaft protruding from the socket portion is housed in an outer case connected to the socket portion, and the advancing / retracting shaft is moved. At a predetermined position of the shaft, a colored portion having a constant width that is continuous in the axial direction is formed, and the outer case is formed with a see-through window having a predetermined width through which the inside can be seen. The width is substantially equal to the width of the see-through window, and the setting position is a position where the one end of the colored portion substantially coincides with the one-side edge of the see-through window; When the socket portion is connected to the plug portion where the plug is in the normal valve closing position, the slide plug is closed so that the end of the colored portion substantially coincides with the other edge of the see-through window. The first bar biasing in the direction Than the biasing force of, inspection tool sliding gas valve which said reciprocating shaft to set small the biasing force of the second spring which urges the socket side. 3. The inspection tool for a slide-type gas stopper according to claim 2, wherein the reciprocating shaft includes a first reciprocating shaft having one end built in the socket portion, and the first reciprocating shaft protruding from the socket portion. A second advance / retreat axis connected to the other end of the shaft and having a different color from the first advance / retreat axis, and a boundary between the first advance / retreat axis and the second advance / retreat axis is provided on the one side of the colored portion; Inspection tool for the sliding gas tap at the end.