JP2001208268A - Socket for quick joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for a quick joint easily performing the attachment/detachment operation between a socket and a plug without needing a large operation force and eliminating a compressed air from jetting out from the plug in releasing the plug from the socket. SOLUTION: This socket is provided with a primary air chamber connected to an air source and feeding the air from the air source at all times, a secondary air chamber formed with an engagement part detachably engaging the plug, and an opening/closing valve opening/closing the primary air chamber and the secondary chamber. The opening/closing valve is provided with a primary-side pressure bearing face and a secondary-side pressure bearing face smaller than the primary-side pressure bearing face, and the primary-side pressure bearing face is faced to the primary air chamber and arranged by energized in the valve opening direction at all times by a spring. The socket is also provided with an air feed pilot valve bypassing the opening/closing valve and guiding the air in the primary air chamber to the secondary air chamber side, and an exhaust pilot valve emitting the air in the secondary air chamber to the air, and the opening/closing valve element is opened/closed by the air pressure using the operation of the respective pilot valves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a socket of a quick joint for detachably connecting, via an air hose, between a compressed air source such as a compressor and a pneumatic device such as a power nailer operated by compressed air. .

[0002]

2. Description of the Related Art In a pneumatic device driven by compressed air or the like, an air source and a device pipe are connected via an air hose to supply compressed air to the device. And quick couplings are used to facilitate connection or disconnection between the air hose and the pneumatic device. The quick coupling consists of a socket located upstream of the air supply and a plug located downstream. In a conventional socket, a lock ball is disposed around an opening for receiving a plug, protrudes into the opening of the plug, engages with an annular groove formed in the plug, and locks the plug. The socket has a slidable operating sleeve that restrains the plug in the protruding position or releases the restraint, and the socket is pressed by contact with the tip of the plug inserted into the opening in the socket. There is a built-in on-off valve that is released when in position. Further, as another type, a type in which the opening / closing valve is manually opened / closed separately from a plug insertion operation is known.

[0003]

In the above-mentioned conventional socket, the on-off valve is urged in the closing direction by a spring force and receives the air pressure supplied from an air source. In the operation of opening the valve, a large operating force is required for mounting the plug to open the on-off valve against the spring force and the air pressure. Further, after the opening / closing valve is pushed and opened by the plug, the air pressure acts on the plug, so that a larger operating force is required. Further, when the plug is detached from the socket, air remaining on the device side may be ejected from the plug, and the plug may be shaken by the reaction of the ejected air. In particular, in the case of a relay hose, the end of the hose with the plug is shaken by the jet air, and in some cases, the property may be damaged or the body may be harmed. In the type in which the on-off valve is manually opened and closed separately from the plug mounting operation, for example, it is necessary to move the valve body against the sliding resistance of an O-ring or the like, and the opening and closing operation is very troublesome. Had become something. An object of the present invention is to solve the above-mentioned disadvantages of the conventional socket and to provide a socket for a quick joint in which the plug mounting operation can be performed easily and compressed air does not blow out from the plug when the air plug is detached. I do.

[0004]

According to the present invention, there is provided a socket for a quick joint for detachably connecting a plug connected to a tool driven by compressed air. Is a primary air chamber connected to an air source and constantly supplied with air from the air source, a secondary air chamber having an engaging portion for detachably engaging a plug, and a primary air chamber and a secondary air chamber. With an on-off valve to open and close the space,
The on-off valve includes a primary-side pressure receiving surface and a secondary-side pressure-receiving surface smaller than the primary-side pressure-receiving surface, and is arranged so that the primary-side pressure-receiving surface faces the primary air chamber and is normally urged by a spring in a valve-opening direction. An air supply pilot valve that bypasses the on-off valve to conduct air in the primary air chamber to the secondary air chamber side, and an exhaust pilot valve that discharges air in the secondary air chamber to the atmosphere are provided. The on-off valve body is opened and closed by air pressure by operation. The socket according to the second aspect is characterized in that the air supply pilot valve and the exhaust pilot valve are arranged so that operation parts that can be operated independently from the outside face outward. Claim 3
Is characterized in that the air supply pilot valve is provided with a safety device for preventing the pilot valve from being inadvertently operated to the operation position. The socket according to claim 4, wherein the socket comprises a lock ball for catching the plug in the engagement portion and an operating sleeve for restraining the lock ball, and each operating end of the air supply pilot valve and the exhaust pilot valve. Part is housed in a control groove formed on the inner peripheral surface of the operation sleeve, and each pilot valve is operated to a non-operation position and an operation position by a rotation operation of the operation sleeve. I do. The socket according to claim 5, wherein the control groove of the operation sleeve is constituted by a vertical groove parallel to a sliding direction of the operation sleeve and a circumferential groove continuously extending in the circumferential direction. The operation end of the pilot valve body is housed in the circumferential groove of the control groove so that the sliding operation of the operation sleeve is disabled.

[0005]

According to the socket of the present invention having the above structure,
Since the plug does not release the open / close valve when the plug is mounted, a large operation force is not required for mounting the plug. Further, since the opening / closing valve is not released until the plug is completely mounted on the socket, no air pressure acts on the plug in the course of mounting, and the mounting operation force due to the action of the air pressure is not increased. Also, since the on-off valve is opened and closed by controlling the air pressure in the secondary air chamber via the air supply pilot valve and the exhaust pilot valve, a large operating force for opening and closing the on-off valve is not required. Operability is good. Furthermore, when removing the plug from the socket, the residual air on the tool side can be exhausted to the atmosphere at the same time as closing the on-off valve before removing the plug, so that the removal operation can be performed lightly without being affected by the air pressure when removing the plug. Also, there is no air ejection from the plug at the moment of the detachment, so that the dancing phenomenon of the hose or the like due to the ejected air can be prevented. According to the second aspect of the invention, each of the air supply pilot valve and the exhaust pilot valve can be arbitrarily operated by an operator, and a relatively simple configuration can be achieved. According to the third aspect of the present invention, since the safety device is formed in the air supply pilot valve, it is possible to prevent the air supply pilot valve from being carelessly operated and to shut off the air during use of the tool. Can be prevented. According to the fourth aspect of the present invention, each of the air supply and exhaust pilot valves can be operated by the operation sleeve that is operated when the plug is attached or detached. Therefore, the operation can be performed in connection with the operation of attaching / detaching the plug without operating each pilot valve. The opening and closing operation of the on-off valve can be automatically performed. According to the fifth aspect of the present invention, since the operating end of each pilot valve is accommodated in the circumferential groove of the operating ring, the plug is connected and the on-off valve is opened to allow air to flow. , The operation ring cannot be slid and the air supply pilot valve must be operated before the plug is installed, or the operation ring must be operated before the exhaust pilot valve must be operated to remove the plug. Can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on an embodiment shown in the drawings. 1 to 3 show a configuration of a socket according to a first embodiment of the present invention. Socket 1
Has a hollow cylindrical portion 2 for receiving a plug at one end side, similarly to a normal socket, and a lock ball 3 housed in a fitting hole formed in a peripheral wall of the cylindrical portion 2 has a cylindrical shape. The plug engages with an annular groove formed on the outer periphery of the plug and protrudes into the shape portion 2 to connect the plug and the socket. The protruding state of the lock ball 3 is restrained or released by the operation sleeve 4 slidably mounted on the outer periphery of the cylindrical portion 2 or released from the restraint. A guide sleeve 5 for preventing the lock ball 3 from protruding into the tubular portion 2 when a plug is not mounted is disposed inside the tubular portion 2. An air passage to the side is formed. At the rear end side of the tubular portion 2 is formed a mounting portion 6 for mounting to the compressed air supply source side. In this embodiment, a male screw portion for fixing to a device such as a compressor is formed. In the case of attaching to an air hose, a known hose connection structure can be adopted.

[0007] Between the hollow cylindrical portion 2 and the mounting portion 6,
An on-off valve 7 for opening and closing between the two is formed. The air supply source side of the on-off valve 7 is separated from the primary air chamber 8, and the plug connection side is separated from the secondary air chamber 9. The on-off valve 7 is seated from the primary air chamber 9 side with respect to an annular valve seat 10 arranged on the inner peripheral surface of the cylindrical portion 2 to close between the two chambers. And a guide cylinder 12 extending toward the secondary air chamber 9. When the valve body 11 separates from the valve seat 10, the air in the primary air chamber 8 is introduced into the guide cylinder 12 through the opening 13 formed in the guide cylinder 12 and flows to the guide sleeve 5. . A tension / compression spring 14 is provided between the end of the guide cylinder 12 of the on-off valve 7 and the guide sleeve 5 to generate a tension action and a compression action at a predetermined interval. The tension / compression spring 14 has hook portions formed at both ends thereof engaged with the guide sleeve 5 and a pin arranged in the guide tube portion 12, and the end of the cylindrical coil portion is provided on the guide sleeve 5. It is arranged so as to face the flange portion and the end of the guide tube portion 12. When the guide sleeve 5 is at the front end position by the action of the tension / compression spring, a pulling action is exerted in a direction to close the on-off valve 7, and when the guide sleeve 5 moves rearward by attaching a plug, The compression action is applied in a direction to open the on-off valve 7. The guide sleeve 5 is constantly urged toward the plug insertion side by a compression spring 14a interposed between the guide sleeve 5 and the cylindrical portion 2. In a state where the primary air chamber 8 is connected to the air source and the compressed air is supplied, the air in the primary air chamber 8 acts on the valve body 11 of the on-off valve 7 to keep the on-off valve 7 closed.

A pilot valve for opening and closing the on-off valve 7 is disposed downstream of the valve body 11 of the on-off valve 7. The air supply pilot valve 15 for opening the on-off valve 7 is configured as an on-off valve that opens and closes between the primary air chamber 8 and the secondary air chamber 9. An air supply pilot valve 15 is provided in a valve housing 16 installed radially with respect to the cylindrical portion 2.
And the first piston valve 17 on the distal end side and the second
A piston valve 18 is provided. The air on the side of the primary air chamber 8, which is constantly supplied to the intermediate portion between the two piston valves 17 and 18 via the air passage 19, is introduced into or shut off from the secondary air chamber 9 by the first piston valve 17. The second piston valve 18 forms a pressure receiving surface larger than the first piston valve 17,
Normally, the first piston valve 17 is biased to a position where air communication from the primary air chamber 8 to the secondary air chamber 9 is shut off by the air pressure introduced in the middle. Air supply pilot valve 1
The operation part 20 formed on one end side of the valve housing 16
The first piston valve 17 is exposed from an opening formed at the outer end of the valve housing 16 and can be manually pressed. With this operation, the first piston valve 17 is connected to the annular groove 21 formed on the inner peripheral surface of the valve housing 16. The air in the primary air chamber 8 arranged at the corresponding position is introduced into the secondary air chamber 9.

An exhaust pilot valve 22 for closing the on-off valve 7 is configured as a valve for opening and closing between the secondary air chamber 9 and the atmosphere. The exhaust pilot valve 22 has the same diameter as that of the exhaust pilot valve 22 but has a large diameter so that the compressed air in the secondary air chamber 9 can be released into the atmosphere at a stretch and the pressure in the secondary air chamber 9 can be sufficiently reduced. Is set. First and second two piston valves 23, 24 of the exhaust pilot valve 22
Are annular grooves 2 formed on the inner wall of the valve housing 25.
6 and is movable between a position disposed opposite to the annular groove 26 and a position separated from the annular groove 26 and sealed to the inner wall of the valve housing. Further, the exhaust pilot valve 22 is constantly urged by a spring 27 provided between the exhaust pilot valve 22 and the valve housing 25 to a position in which the space between the secondary air chamber 9 and the atmosphere is closed. The exhaust pilot valve 22 is moved to a position that opens the inside of the secondary air chamber 9 to the atmosphere by pressing the operation portion 28 exposed at the outer end of the valve housing 25.

A state in which the plug 29 is connected to the socket 1 of the first embodiment will be described with reference to FIGS. As shown in FIG. 4, when the plug 29 is not connected to the socket 1, the guide sleeve 5 moves to the left in the figure, and the on-off valve 7 is placed in the closed position by the pulling action of the tension / compression spring 14. Have been. The valve element 11 of the on-off valve 7 is seated on the valve seat 10 and shuts off between the primary air chamber 8 and the secondary air chamber 9. In this state, when the socket 1 is connected to an air source such as a compressor, air is supplied to the primary air chamber 8, and this air pressure acts on the pressure receiving surface on the primary air chamber 8 side of the valve body portion 11 to generate air. Maintain the closed state. This prevents the compressed air from leaking between the primary air chamber 8 and the secondary air chamber 9.

When the plug 29 is inserted into the socket 1 from the open end of the cylindrical portion 2, the guide sleeve 5
3 is moved rightward in the figure by contacting the flange portion 30. As a result, a compression action is generated in the tension / compression spring 14 to generate a pressing action in the opening direction of the on-off valve 7, but the action of the air pressure acting on the pressure receiving surface on the primary air chamber 8 side of the valve body 11 is more effective. Large, the on-off valve 7 is maintained in the closed position.
As shown in FIG. 5, the lock ball 3 fits into the annular groove 31 of the plug 29, and the operation sleeve 4 slides on the outer peripheral side of the lock ball 3 to restrain the lock ball 3 in a protruding state and mount the plug. Is completed. During this time, the air supply pilot valve 15
Remains in the closed position and stops the flow of air into the secondary air chamber 9, so that the inside of the secondary air chamber 9 remains at the atmospheric pressure, and is completely affected by air when the plug 29 is mounted. Absent.

Next, as shown in FIG.
When the valve 5 is operated, the second piston valve 18 of the pilot valve moves to the annular groove 21 to introduce the air in the primary air chamber 8 to the secondary air chamber 9 through the air passage 19. The pressure inside the secondary air chamber 9 is increased by the introduction of the air, and this pressure air acts on the pressure receiving surface of the on-off valve 7 on the side of the secondary air chamber to cooperate with the pressing force of the tension / compression spring 14. The on-off valve 7 is opened. As shown in FIG. 6, after the on-off valve 7 moves to the open position, even if the operation of the air supply pilot valve 15 is released and the supply of air via the air passage 19 is cut off, Since air is introduced through the on-off valve 7, the on-off valve 7 is kept in the open position by the compression action of the tension / compression spring 14.

When the exhaust pilot valve 22 is operated from the above state as shown in FIG. 7, the secondary air chamber 9 is connected to the atmosphere, and the pressure in the secondary air chamber 9 decreases. As a result, the pressing force by the air pressure acting on the on-off valve from the secondary air chamber 9 decreases, and the on-off valve 7 moves in the closing direction by the pressing force acting on the on-off valve 7 from the primary air chamber 8 side. Thus, the communication between the primary air chamber 8 and the secondary air chamber 9 is cut off. Further, by maintaining the operation state of the exhaust pilot valve 22, the air remaining in the air tool or the air hose connected to the plug 29 is discharged through the exhaust pilot valve 22. Thereafter, even if the exhaust pilot valve 22 is released, no air flows into the secondary air chamber 9, so that the exhaust valve 7 does not open again. Thereafter, the operation sleeve 4 is slid rightward in the figure to release the lock ball 3 from the restrained state, whereby the plug 29 can be detached from the socket. At this time, since there is no compressed air in the secondary air chamber 9 and on the tool side, no air action occurs when the plug 29 is disengaged, and the plug 29 when the plug 29 is disengaged.
There is no ejection of air from the tool side.

FIGS. 8 to 13 show a socket 32 according to a second embodiment of the present invention. In this embodiment, the operating end portions 3 of the air supply pilot valve 33 and the exhaust pilot valve 34
The fifth embodiment differs from the first embodiment in that 5, 5 are operated by cam grooves 38, 39 formed on the inner peripheral surface of an operation sleeve 37 for restraining the lock ball 3. The operation sleeve 37 of this embodiment is mounted so as to be rotatable in the circumferential direction in addition to the movement in the slide direction for restraining and releasing the lock ball 3. 34 is extended to a position covering the same. On the rear inner peripheral surface of the operation sleeve 37, there are formed longitudinal grooves 40, 41 along the sliding direction, and cam grooves 38, 43 constituted by circumferential grooves 42, 43 connected to the longitudinal grooves 40, 41.
39 are formed corresponding to each pilot valve,
The cam grooves 38 and 39 are formed of a deep groove portion that does not press the pilot valves 33 and 34 and a shallow groove portion that presses the pilot valves 33 and 34 to the operation position.
The cam groove 38 for the air supply pilot valve 33 is formed such that a vertical groove 40 is formed in a deep groove, and is gradually changed to a shallow groove at an end portion of a circumferential groove 42 following the vertical groove. The cam groove 39 for the exhaust pilot 34 valve gradually changes so that the vertical groove 41 is formed shallow and becomes deeper at the end of the circumferential groove 43.

Before the plug 29 is mounted as shown in FIG. 10, the operating portions 35 and 36 of the air supply pilot valve 33 and the exhaust pilot valve 34 are connected to the vertical grooves 40 and 39 of the cam grooves 38 and 39, respectively.
The air supply pilot valve 33 is engaged with the deep groove and is arranged at the non-operating position to block the communication path between the primary air chamber 8 and the secondary air chamber 9. Exhaust pilot valve 3
Numeral 4 engages with the shallow groove and is operated to the operating position to open the secondary air chamber 9 to the atmosphere. Then, as shown in FIG. 11, when the plug 29 is mounted, the operation sleeve 37 moves forward to restrain the lock ball 3, but any of the cam grooves 38, 39 has the depth of the vertical grooves 40, 41. Since the height does not change, the pilot valves 33 and 34 do not change from the initial state. Accordingly, since the on-off valve 7 is not opened, no air is affected when the plug 29 is mounted.

Next, as shown in FIG.
7 by rotating each pilot valve 33, 3
4 are guided by the circumferential grooves 42, 43 of the cam grooves 38, 39. When the operation sleeve 37 reaches the end of the rotation operation, the exhaust pilot valve 34 moves from the shallow groove to the deep groove and moves to the non-operation position, and shuts off between the secondary air chamber 9 and the atmosphere. The air supply pilot valve 33 moves from the deep groove to the shallow groove and is moved to the operation position. As a result, the air in the primary air chamber 8 is introduced into the secondary air chamber 9 through the air passage 19, the pressure in the secondary air chamber 9 increases, and the on-off valve 7 operates to the open position. Operation sleeve 3
7 is rotated, each pilot valve 33, 3
The operation end portions 35 and 36 of the fourth engagement with the circumferential grooves 42 and 43 prevent the operation sleeve 37 from moving in the sliding direction. This can prevent an accident in which the operation sleeve 37 is accidentally slid and the plug 29 is detached from the socket 32. By rotating the operation sleeve 37 to the initial position as shown in FIG. 13, the air supply pilot valve 33 and the exhaust pilot valve 34 are respectively arranged in the initial state, so that the primary air is transmitted through the communication port 19. A means is provided between the chamber 8 and the secondary air chamber 9, and at the same time, the secondary air chamber 9 is released to the atmosphere and the pressure drops, whereby the on-off valve 7 is closed and the supply of air from the primary air chamber 8 is shut off. At the same time, residual air on the tool side is discharged from the exhaust pilot valve 34. Thereafter, the operation sleeve 37 can be slid to detach the plug 29 from the socket 32 without any influence of the pressure.

Another embodiment shown in FIGS. 14 to 16 is that a safety device is added to the manually operable air supply pilot valve 44 in the above-described first embodiment, and the other configuration is the same as the above-mentioned first embodiment. This is the same as the embodiment. The safety device 45 includes an operation plate 47 disposed on the lower surface of the operation end 46 of the air supply pilot valve 44, and an opening 48 formed in the operation plate 47 is aligned with a boss 49 of the pilot valve 44. As a result, the pilot valve 44 can be operated, and the edge of the opening 48 abuts on the boss 49 as shown in FIG. 44 is disabled. On the other end side of the operation plate 47, a pressing operation portion 51 is formed. By pushing this in against the action of the spring 50, the opening 48 aligns with the boss portion 49 and the pilot valve 4
4 can be operated. That is, to operate the air supply pilot valve 44, the pressing operation unit 5 of the safety device 45 is operated.
It is necessary to simultaneously operate 1 and the operating end 46 of the pilot valve, thereby preventing the air supply pilot valve 44 from being carelessly operated.

In each of the above-described embodiments, the configuration in which the air supply pilot valve and the exhaust pilot valve are arranged to face the socket is disclosed. However, the present invention is not limited to this configuration. It is possible to arrange the valves radially at an angle or to arrange both pilot valves axially side by side.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a socket according to a first embodiment of the present invention.

FIG. 2 is a vertical side view of the socket of FIG.

FIG. 3 is a sectional view of the socket of FIG. 1 taken along line AA in FIG. 2;

FIG. 4 is a sectional view showing a state before mounting a plug in the first embodiment.

FIG. 5 is a sectional view showing a state in which the plug is mounted and the air supply pilot valve is operated.

FIG. 6 is a sectional view showing a state in which the exhaust pilot valve is operated.

FIG. 7 is a sectional view showing a state in which the on-off valve is bound.

FIG. 8 is a longitudinal sectional view showing a socket according to a second embodiment of the present invention.

FIG. 9 is a sectional view taken along line BB in FIG. 8;

FIG. 10 is a sectional view showing a state before mounting a plug in a second embodiment.

FIG. 11 is a sectional view showing a state where the plug is mounted.

FIG. 12 is a sectional view showing a state where the operation sleeve is rotated.

FIG. 13 is a sectional view showing a state in which the operation sleeve is returned to a position where sliding operation is possible.

FIG. 14 is a perspective view showing a part of an air supply pilot valve according to still another embodiment.

FIG. 15 is a sectional view showing a state in which the safety device of the same embodiment as that of FIG. 14 is not operated.

FIG. 16 is a sectional view showing a state in which the safety device is released and the air supply pilot valve is operated.

[Explanation of symbols]

 1, 32, 44 Socket 2 Cylindrical part 3 Lock ball 4, 37 Operation sleeve 5 Guide sleeve 6 Attachment part 7 Open / close valve 8 Primary air chamber 9 Secondary air chamber 14 Extension / compression spring 15, 33 1 piston valve 18 second piston valve 19 air passage 20 operating section 21 annular groove 22, 34 exhaust pilot valve 23 first piston valve 24 second piston valve 26 annular groove 27 spring 28 operating section 35, 36 operating end 38, 39 Cam groove 40, 41 Vertical groove 42, 43 Circumferential groove 45 Safety device 46 Operation end 47 Operation plate 48 Opening 49 Boss 50 Spring 1 Pressing operation

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshihide Okuno 6-6, Hakozakicho, Nihonbashi, Chuo-ku, Tokyo F-term (reference) 3H056 AA01 BB01 BB32 BB45 CA15 CD04 CD06 GG01 GG11 3J106 AB01 BB01 BC04 BC12 BD01 BD05 BE24 BE29 CA13 EA03 EB07 EC02 EC07 ED32 EE13 EF07 EF08 GA01 GA05 GA23 GB01 GB03 GB10

Claims (5)

[Claims] 1. A socket of a quick joint for detachably connecting a plug connected to a tool driven by compressed air, wherein the socket is connected to an air source and constantly supplied with air from the air source. A primary air chamber, a secondary air chamber having an engaging portion for detachably engaging a plug, and an open / close valve for opening and closing the primary air chamber and the secondary air chamber. A pressure-receiving surface and a secondary-side pressure-receiving surface smaller than the primary-side pressure-receiving surface are provided, and the primary-side pressure-receiving surface faces the primary air chamber and is always urged by a spring in the valve-opening direction to bypass the on-off valve. An air supply pilot valve for conducting air in the primary air chamber to the secondary air chamber side, and an exhaust pilot valve for discharging air in the secondary air chamber to the atmosphere. Open / close operation by air pressure A quick joint socket characterized by the following: 2. The socket according to claim 1, wherein the air supply pilot valve and the exhaust pilot valve are arranged so that an operation part that can be operated independently from the outside faces outward. . 3. The socket according to claim 2, wherein the air supply pilot valve is provided with a safety device for preventing the pilot valve from being inadvertently operated to an operation position. 4. The socket includes a lock ball for catching the plug in the engagement portion and an operation sleeve for restraining the lock ball, and each operation end of the air supply pilot valve and the exhaust pilot valve is provided. The pilot valve is housed in a control groove formed in an inner peripheral surface of the operation sleeve, and each pilot valve is operated to a non-operation position and an operation position by a rotation operation of the operation sleeve. Item 2. The socket according to Item 1. 5. The control groove of the operating sleeve is constituted by a vertical groove parallel to a sliding direction of the operating sleeve and a circumferential groove extending in a circumferential direction continuously from the vertical groove. 5. The socket according to claim 4, wherein the operating end of the body is accommodated in the circumferential groove of the control groove so that the sliding operation of the operating sleeve is disabled.