JP5319507B2 - Joint member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint member capable of restraining the occurrence of such a state that the joint member is held by a plug in spite of not being a connected state. <P>SOLUTION: In a non-connected state and in a half-connected state in which the tip of the plug 50 abuts on the tip of a second seal member 65, the inner diameter portion of a first seal member 61 abuts on an abutting surface which is the outer peripheral surface of a connection part located on the plug tip side rather than a locking recess 53. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a joint member provided with a seal member that comes into contact with a connecting portion of a plug from a radially outer side.

  The joint member that is the subject of the present application is used by being connected to a hose or the like when the hose or the like (for example, a gas hose) is detachably connected to the plug. As a conventional example of such a joint member, for example, there is a technique disclosed in Patent Document 1 below. In the configuration described in Patent Document 1, the joint member 8 includes a cylindrical main body 30, an actuating member 32, a sliding member 34, a locking ball 36, and a cover member 38 (paragraph [0020]. ], FIG. 2). When attaching the joint member 8 to the plug 6, the operator holds the cover member 38 of the joint member 8 and pushes it into the plug 6. By this operation, the connection portion 4 of the plug 6 is received into the cylindrical main body 30 from the joint distal end side. Then, as the connecting portion 4 enters the cylindrical main body 30, the actuating member 32 moves to the joint proximal end side, and when the actuating member 32 reaches a predetermined position for connection, the locking ball 36 moves to the connecting portion 4. The fitting member 8 and the plug 6 are connected to each other by being fitted into the formed lock groove 16 (paragraph [0029], FIG. 3). When the lock ball 36 is fitted into the lock groove 16 in order to maintain the connection state between the joint member 8 and the plug 6, the sliding member 34 moves to the joint tip side, and the lock groove 16 of the lock ball 36 is moved. The withdrawal from is regulated.

  In the above connection state, the seal member 66 attached to the operating member 32 abuts on the distal end portion of the connection portion 4 and the seal member 58 attached to the cylindrical main body 30 contacts the outer peripheral surface of the connection portion 4. Touch. As a result, the gap between the plug 6 and the joint member 8 is double-sealed by the seal members 66 and 58, thereby preventing gas leakage more reliably.

  In the release operation, the connection with the plug 6 is released by operating the sliding member 34 to the side away from the plug 6 in the joint member 8 connected and fixed to the plug 6.

JP 2006-9906 A

  As a result of diligent research, the present inventors have found that when the joint member 8 having the double seal structure as described in Patent Document 1 is connected to the plug 6 or separated from the plug 6, the joint member 8 and the plug It has been found that the joint member 8 may be held by the plug 6 even though it is not in a connected state. As will be described later, this holding state is particularly problematic when the joint member 8 is detached from the plug 6. When such a state occurs, the operator may misrecognize that the connected state is not the connected state. However, it has not been known under what conditions the state in which the joint member 8 is held by the plug 6 in spite of being not in a connected state, and of course to solve this problem. The means are not known.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a joint member including a seal member that comes into contact with the connecting portion of the plug from the outside in the radial direction. It is providing the coupling member which can suppress generation | occurrence | production of the state by which a member is hold | maintained at a plug.

  In order to achieve the above object, the characteristic configuration of the joint member according to the present invention includes a substantially cylindrical main body portion that receives the connecting portion of the plug in the axial direction from the joint distal end side, and an axial portion at an inner peripheral portion of the main body portion. A substantially cylindrical actuating portion that is configured to be movable and is urged toward the joint distal end side by an urging mechanism, and the main body portion moves toward the inner diameter side in the receiving state in which the plug is received, and A plug lock mechanism having a radially moving member that restricts axial movement of the main body relative to the plug and is restricted from moving toward an inner diameter side by the operating portion in a detached state in which the plug is detached from the main body; The main body portion receives the connecting portion, the operating portion is moved to the joint proximal end side, and the radial movement member moves to the inner diameter side and falls into a locking recess provided in the connecting portion, The A connection state in which relative movement in the axial direction between the main body portion and the main body portion is prevented, the plug is detached from the main body portion, the operating portion is moved to the joint distal end side, and the radially moving member is It is configured to be selectable to a non-connected state in which movement to the inner diameter side is prevented, and the main body portion is arranged on the inner diameter surface on the joint tip side from the position of the radial movement member in the axial direction, and the outer peripheral surface of the connection portion A first seal member that abuts from the outside in the radial direction, the actuating portion includes a second seal member that abuts the tip of the connection portion, is in the non-connected state, and the tip of the plug is In a half-connected state in which the front end of the second seal member is in contact, the inner diameter portion of the first seal member is in contact with a contact surface that is an outer peripheral surface of the connection portion located on the plug front end side with respect to the locking recess. .

As a result of intensive research, the present inventors have found that the state in which the joint member is held by the plug even though it is not in the connected state is a disconnected state, and the tip of the plug hits the tip of the second seal member. It has been found that, in the semi-connected state in contact, it occurs in a situation where the inner diameter portion of the first seal member enters the locking recess. Under such circumstances, since the inner diameter portion of the first seal member enters the locking recess, the force required for relative movement between the joint member (main body portion) and the plug (connection portion) increases. If the force against the urging force to the joint distal end of the urging mechanism is not applied, the actuating part that contacts the distal end of the plug via the second seal member moves to the joint proximal end side with respect to the main body. do not do. Therefore, under the above circumstances, the joint member is held by the plug via the first seal member and the second seal member.
The present invention has been made on the basis of the above-described novel technical knowledge. According to the above-described characteristic configuration, the inner diameter portion of the first seal member is located closer to the plug tip than the recess for locking in the half-connected state. Compared with the case where the inner diameter portion of the first seal member enters the locking recess, the relative movement between the joint member (main body portion) and the plug (connecting portion) in order to contact the contact surface that is the outer peripheral surface of the connecting portion The force required for is small. Therefore, even if a particularly large force is not applied to the joint member, the joint member is easily detached from the plug due to gravity or the like. Therefore, according to this structure, generation | occurrence | production of the state by which a coupling member is hold | maintained at a plug can be suppressed although it is not a connection state.
According to the above characteristic configuration, the inner diameter portion of the first seal member may enter the locking recess in the transition process from the connected state to the semi-connected state, or in the transition process from the semi-connected state to the connected state. Although it is possible, even if the inner diameter portion of the first seal member enters the locking recess, the state is not maintained, and the state where the joint member is held by the plug does not occur. Because, in these transition processes, the operating part is located between the position in the non-connected state and the position in the connected state, so that the urging force to the joint tip side by the urging mechanism is applied to the connecting part. It is because it acts through. That is, even if the inner diameter portion of the first seal member enters the locking recess in the above transition process, the connecting portion does not stay at that position but moves to the joint tip side with respect to the main body portion by the biasing force. The first seal member comes out of the locking recess, and the state where the inner diameter portion of the first seal member enters the locking recess is not maintained.

  Here, in the semi-connected state in which the tip of the plug comes into contact with the tip of the second seal member, which is reached through a connection release operation that is a transition from the connected state to the non-connected state, the first seal member It is preferable that the inner diameter portion of the contact portion is in contact with an abutment surface which is an outer peripheral surface of the connection portion located on the plug tip side with respect to the locking recess.

In many cases, the joint member that is the subject of the present application is provided with a connection sound generation mechanism that notifies the completion of the connection operation to the plug. Therefore, even if the joint member is held by the plug before being connected in the process of connection operation to the plug, the operator recognizes that the connection state has not been reached because the connection sound is not generated. be able to. Therefore, the subject of this application becomes a problem especially when removing a coupling member from a plug.
According to this configuration, the connection portion in which the inner diameter portion of the first seal member is located closer to the plug tip than the locking recess in the semi-connection state reached through a connection release operation that is a transition from the connected state to the non-connected state Since it contacts the contact surface which is the outer peripheral surface, when the joint member is removed from the plug, it is possible to reliably suppress the occurrence of a state in which the joint member is held by the plug even though it is not in the connected state.
By the way, when the first seal member is not formed of a flexible material, the inner diameter portion of the first seal member in the semi-connected state reached in the process of the connection operation that is the transition from the non-connected state to the connected state is It is located at substantially the same position as the inner diameter portion of the first seal member in the semi-connected state reached through the connection release operation. In addition, when the first seal member is formed of a flexible material, the inner diameter portion of the first seal member bends toward the joint proximal end side in the semi-connected state reached in the connection operation, and the connection is released. In the half-connected state reached through the operation, the inner diameter portion of the first seal member bends toward the joint tip side. Therefore, in the semi-connected state reached through the connection release operation, if the inner diameter portion of the first seal member comes into contact with the contact surface located on the plug tip side from the locking recess, the half-time reached in the connection operation process. Even in the connected state, the inner diameter portion of the first seal member abuts on the outer peripheral surface of the connecting portion located on the plug tip side from the locking recess or the plug tip portion of the connecting portion. Therefore, according to said structure, when connecting a joint member to a plug, generation | occurrence | production of the state by which a joint member is hold | maintained at a plug is suppressed although it is not a connection state.

  The first seal member includes a substantially annular seal main body fixed to the main body, and a substantially annular radial protrusion formed to project radially inward from the seal main body. An end of the radial protrusion opposite to the seal main body constitutes a seal tip as an inner diameter portion of the first seal member, the radial protrusion is made of a flexible material, In a natural state where one seal member is not deformed, it is preferable that the axial width of the seal tip is formed smaller than the axial width of the opening of the locking recess.

  In this configuration, in the transition process from the connected state to the semi-connected state or the transition process from the semi-connected state to the connected state, a state in which the seal tip portion of the first seal member enters the locking recess occurs. However, as described above, the state where the inner diameter portion of the first seal member enters the locking recess is not maintained, and the joint member is not held by the plug. The present invention is particularly suitable for such a joint member.

  Further, the first seal member includes the seal main body portion and the radial projecting portion, and in a natural state where the first seal member is not deformed, the axial width of the seal distal end portion is used for the locking. In the configuration formed to be smaller than the axial width of the opening of the recess, in the connection state, the radial position where the outer peripheral surface of the connection portion is located in the main body is the first radial position, and The radial position at which the bottom of the locking recess is located is the second radial position, and the radial position that is substantially evenly spaced from both the first radial position and the second radial position is the third radial direction. In a natural state where the first seal member is not deformed, the radial position of the seal tip is on the outer diameter side of the second radial position, and is more than the third radial position. Is also on the inner diameter side To be suitable.

  According to this configuration, in the transition process from the connected state to the semi-connected state or the transition process from the semi-connected state to the connected state, a state occurs in which the seal tip of the first seal member enters near the bottom of the locking recess. Therefore, in this state, the force required for relative movement between the joint member (main body portion) and the plug (connecting portion) can be increased. However, as described above, the state in which the inner diameter portion of the first seal member enters the locking recess is not maintained, so that the joint member is not held by the plug. The present invention is particularly suitable for such a joint member.

  Further, the plug lock mechanism is attached to a through hole that is formed at a predetermined position in the circumferential direction of the main body portion and communicates with an outer peripheral surface and an inner peripheral surface of the main body portion, and is movably mounted in the through hole in a radial direction. It is preferable that the locking recess as the radially moving member is a recess for inserting a part of the locking ball in the connected state.

  According to this configuration, the configuration of the plug lock mechanism including the radial direction moving member can be simplified, and the present invention can be realized with a simple configuration.

It is an axial direction sectional view of a joint member and a plug for explaining a disconnected state of a joint member concerning an embodiment of the present invention. It is explanatory drawing for showing the process from the non-connection state of the coupling member which concerns on embodiment of this invention to a connection state. It is an axial direction sectional view of a joint member and a plug for explaining a connection state of a joint member concerning an embodiment of the present invention. It is an axial direction sectional view of a joint member and a plug for explaining a half-connected state of a joint member concerning an embodiment of the present invention. FIG. 5 is a partially enlarged view of FIG. 4. It is a figure which shows the comparative example for demonstrating a mode that a coupling member is hold | maintained at a plug. It is a partial axial sectional view of a joint member and a plug for showing the composition of the 1st seal member concerning the embodiment of the present invention.

An embodiment of a joint member according to the present invention will be described with reference to the drawings. In addition, this invention is not limited to the structure described in embodiment and drawing demonstrated below, A various modification | change is possible if it is a structure with the same effect.
Here, a case where the present invention is applied to a joint member that is detachably connected to a plug supplied with a gas (for example, city gas) from a gas supply source will be described as an example. As shown in FIG. 5, in the joint member 1 according to this embodiment, in a semi-connected state, the inner diameter portion (seal tip portion 64) of the first seal member 61 is connected to the plug tip side from the locking recess 53. It has the characteristics that it is comprised so that it may contact | abut to the contact surface which is a part outer peripheral surface. Hereinafter, the joint member 1 according to the present embodiment will be described in the order of “configuration of joint member” and “suppression mechanism of the joint member holding state”.

  In the following description, regarding the joint member 1 and the components constituting the joint member 1, the side to which the plug 50 is connected is referred to as a “tip side”, and the side to which the hose 2 on the opposite side to the plug connection side is connected. “Base end side”. That is, in FIG. 1, the left side is the distal end side (hereinafter sometimes referred to as the joint distal end side) with respect to the joint member 1 and the components constituting the joint member 1, and the right side is the proximal end with respect to the joint member 1 and the components constituting the joint member 1. Side (hereinafter sometimes referred to as a joint base end side). On the other hand, regarding the plug 50, the side connected to the joint member 1 is referred to as “tip side”, and the side opposite to the joint member connection side is referred to as “base end side”. That is, in FIG. 1, the right side is the distal end side (hereinafter sometimes referred to as the plug distal end side) with respect to the plug 50, and the left side is the proximal end side (hereinafter sometimes referred to as the plug proximal end side) with respect to the plug 50. .

  In the following description, unless otherwise specified, the directions of “axial direction”, “radial direction”, and “circumferential direction” are determined based on the substantially cylindrical main body 20. That is, the “axial direction” is a direction along the central axis of the main body 20 (the left-right direction in FIG. 1), the “radial direction” is a direction orthogonal to the axial direction, and the “circumferential direction” is the main body 20 The direction of rotation around the central axis (or the tangential direction thereof) shall be expressed.

  In the present embodiment, the locking ball 24 corresponds to the “radially moving member” in the present invention, and the first coil spring 81 corresponds to the “biasing mechanism” in the present invention.

1. Configuration of Joint Member A joint member 1 according to the present embodiment has a gas flow passage extending in the axial direction therein, and as shown in FIG. 1, a main body portion 20, an operation portion 80, a cover portion 40, The sleeve portion 30 and the connector 3 are provided. The main body part 20, the operating part 80, the cover part 40, and the sleeve part 30 are all substantially cylindrical members and are arranged coaxially. In addition, the structure of the main-body part 20, the operation part 80, the cover part 40, and the sleeve part 30 is demonstrated in detail later. The connector 3 is connected to the main body 20 and is a part for connecting the other end of the hose 2 having one end connected to a gas supply destination side of a gas consuming device or the like. The hose 2 is formed of a flexible material such as a rubber hose, for example.

  Here, the configuration of the plug 50 to which the joint member 1 according to this embodiment is connected will be briefly described. Since such a plug 50 is publicly known, detailed description thereof is omitted here. As shown in FIG. 1, the plug 50 includes a plug body and a connection portion 51 to which the joint member 1 is connected. Such a plug 50 is provided, for example, in a gas stopper to which gas is supplied from an in-wall pipe that is a gas supply source. And the connection part 51 is provided with the 1st annular part 55, the recessed part 53 for a lock | rock, and the 2nd annular part 56 toward the front end side from the base end side. In this example, the first annular portion 55 and the second annular portion 56 are configured to have the same diameter. Further, the locking recess 53 is formed along the circumferential direction of the outer periphery of the connecting portion 51. In this example, the cross-sectional shape orthogonal to the circumferential direction is a substantially trapezoidal groove-like portion.

  Inside the plug 50, a fluid flow path along the axial direction from the proximal end side to the distal end side, a valve body 58, and a valve seat 59 are provided. The position of the valve body 58 with respect to the valve seat 59 is configured to switch between an open state that allows the gas flow in the fluid flow path and a closed state that prevents the gas flow in the fluid flow path. . In order to enable switching between such an open state and a closed state, the joint member 1 is provided with a pressing member 26.

  The joint member 1 detachably connected to the plug 50 can selectively realize (switchable) a “connected state”, “non-connected state”, and “intermediate state” described below. It is configured. Here, in the connected state (also referred to as “accepted state”), the connecting portion 51 of the plug 50 has entered the inside of the main body portion 20 and the locking ball 24 has been fitted into the locking concave portion 53 so that the plug In this state, the axial movement of the main body 20 with respect to 50 is restricted. In other words, in the connected state (accepted state), the main body 20 receives the connecting part 51, the operating part 80 is moved to the joint proximal end side, and the locking ball 24 is moved to the inner diameter side to connect the connecting part 51. Is in a state in which the plug 50 and the main body 20 are prevented from moving relative to each other in the axial direction. Further, the disconnected state is a state where the operating unit 80 is not pushed into the joint proximal end side against the biasing force of the first coil spring 81. Specifically, in the disconnected state, the plug 50 is detached from the main body 20, the operating portion 80 is moved to the joint tip side, and the locking ball 24 is prevented from moving toward the inner diameter side. State ", the operating portion 80 and the plug 50 are in contact (in this example, contacted via the second seal member 65), but the operating portion 80 is moved from the position in the disengaged state to the joint proximal end side. "Semi-connected state" not included. Further, the intermediate state is a state other than the connected state and the non-connected state. Specifically, the operating unit 80 and the plug 50 are in contact with each other, and the operating unit 80 resists the urging force of the first coil spring 81. In this state, the locking ball 24 is not fitted into the locking recess 53, although it is pushed into the joint base end side. Accordingly, FIG. 1 is a diagram showing a disconnected state, FIG. 2 (a) is a diagram showing a state immediately before switching to a semi-connected state, FIG. 2 (b) is a diagram showing an intermediate state, and FIG. c) and FIG. 3 are diagrams showing a connection state. FIG. 4 is a diagram showing a half-connected state.

1-1. Configuration of Main Body As shown in FIG. 1, the main body 20 is a substantially cylindrical member that receives the connecting portion 51 of the plug 50 in the axial direction from the joint distal end side. The space formed inside the main body portion 20 is a space for accommodating the connection portion 51 of the plug 50, and functions as a flow path through which the gas supplied from the plug 50 is circulated in the connected state. As shown in FIG. 3, the inner diameter of the cylindrical portion of the main body portion 20 is formed to be slightly larger than the outer diameters of the first annular portion 55 and the second annular portion 56 of the connection portion 51. It is configured to allow entry into the portion 20. Then, the gas supplied from the plug 50 flows to the joint proximal end side along the axial direction, and is supplied to the hose 2 through the connector 3.

  The main body 20 includes a plug lock mechanism 22 and a pressing member 26 that acts on the valve body 58 of the plug 50 and presses the valve body 58 toward the proximal end side of the plug 50. The plug lock mechanism 22 regulates the axial movement of the main body 20 with respect to the plug 50 in the receiving state (connected state) in which the main body 20 receives the plug 50, and in the detached state in which the plug 50 is detached from the main body 20. This is a mechanism for restricting movement of the sleeve portion 30 relative to the main body portion 20 toward the joint tip side. In the present embodiment, the plug lock mechanism 22 penetrates the outer peripheral surface and the inner peripheral surface of the main body 20 formed at predetermined positions in the peripheral direction of the main body 20 (in this example, three locations in the peripheral direction). A hole 25 and a locking ball 24 mounted on each of the through holes 25 so as to be movable in the radial direction are provided. As shown in FIG. 3, the axial position of the through hole 25 is configured to substantially coincide with the axial position of the locking recess 53 of the connecting portion 51 in the connected state. The locking ball 24 is made of, for example, a steel ball. In this example, the diameter of the steel ball is set slightly smaller than the inner diameter of the through hole 25.

  As shown in FIG. 1, in the disengaged state, the locking ball 24 projects radially outward with respect to the outer peripheral surface of the main body portion 20, and restricts movement of the sleeve portion 30 relative to the main body portion 20 toward the joint distal end side. To do. At this time, the outer peripheral surface of the end portion on the distal end side of the operating portion 80 is located on the radially inner side of the locking ball 24, and the movement of the locking ball 24 to the radially inner side (inner diameter side) is restricted. The same applies to the half-connected state.

  In addition, as shown in FIG. 2B, even in the intermediate state, the locking ball 24 protrudes radially outward with respect to the outer peripheral surface of the main body 20, and the joint tip side of the sleeve portion 30 with respect to the main body 20. Restrict movement to On the other hand, the movement of the locking ball 24 toward the radially inner side (inner diameter side) in the intermediate state is regulated by the operating portion 80 and regulated by the connecting portion 51 (the outer peripheral surface of the second annular portion 56). And a state regulated by both the operating unit 80 and the connection unit 51, and takes either state depending on the positional relationship in the axial direction of the connection unit 51 with respect to the main body unit 20. FIG. 2B shows a state in which the movement of the locking ball 24 inward in the radial direction is restricted by the connecting portion 51 (the outer peripheral surface of the second annular portion 56).

  On the other hand, as shown in FIGS. 2 (c) and 3, in the connected state (accepted state), the locking ball 24 moves radially inward (inner diameter side) and is fitted in the locking recess 53. That is, the axial movement of the main body 20 with respect to the plug 50 is restricted in a state in which the inner peripheral surface of the main body 20 protrudes radially inward. In this state, the movement of the locking ball 24 outward in the radial direction is restricted by the inner peripheral surface of the sleeve portion 30. Therefore, once in the connected state, unless the sleeve portion 30 moves to the joint proximal end side, the locking ball 24 is not detached from the locking recess 53, and the connected state is maintained. Thus, the locking recess 53 is a recess for inserting a part of the locking ball 24 in the connected state.

  The pressing member 26 is a member that acts on the valve body 58 of the plug 50 and switches the state of the plug 50 between an open state and a closed state. Specifically, the pressing member 26 enters the inside of the connecting portion 51 as the connecting portion 51 enters the main body portion 20. Then, the distance between the pressing member 26 and the valve body 58 is determined according to the depth of penetration of the connecting portion 51 into the main body portion 20, and in the connected state shown in FIG. The valve body 58 is pressed toward the plug proximal end side, and the valve body 58 is separated from the valve seat 59. As a result, the plug 50 is opened in the connected state, and gas is supplied from the plug 50 to the hose 2 through the joint member 1.

  By the way, the main-body part 20 is provided with the sleeve protrusion prevention part 21 in the joint front end side. Specifically, as shown in FIG. 1, the sleeve protrusion preventing portion 21 is formed on the joint distal end side from the through hole 25 on the outer peripheral surface of the main body portion 20. The sleeve protrusion prevention portion 21 is uniformly formed over the entire region in the circumferential direction, and the inclined surface 32 uniformly formed over the entire region in the circumferential direction overlaps with the sleeve portion 30 in the radial direction. That is, it is comprised so that it may overlap in an axial view. Thereby, the sleeve protrusion prevention part 21 can prevent the sleeve part 30 from moving from the position where the sleeve protrusion prevention part 21 and the inclined surface 32 abut to the joint distal end side.

  In the present embodiment, the sleeve protrusion preventing portion 21 is an inclined surface whose normal direction intersects the axial direction. Specifically, the sleeve protrusion prevention portion 21 is configured such that the normal direction thereof is substantially the same as the normal direction of the inclined surface 32. As shown in FIG. 3, in this example, the sleeve protrusion preventing portion 21 is configured not to contact the inclined surface 32 and to face the inclined surface 32 in a slightly separated state even in the connected state. Yes. That is, the sleeve protrusion preventing portion 21 can prevent the sleeve portion 30 from moving toward the joint distal end side. However, in this example, the sleeve portion 30 does not prevent the sleeve portion 30 from moving toward the joint distal end side in a normal use state. It has become. However, if for some reason the movement of the sleeve part 30 to the joint tip side by the protrusion 41 of the cover part 40 is incomplete, the sleeve protrusion prevention part 21 abuts against the inclined surface 32, The movement of the sleeve portion 30 toward the joint tip side is prevented.

  The main body 20 includes a first seal member 61 on the inner peripheral surface and a third seal member 66 on the outer peripheral surface. The first seal member 61 is a substantially annular member disposed in a groove formed along the circumferential direction on the inner peripheral surface of the main body 20. Specifically, the first seal member 61 is disposed on the joint distal end side in the axial direction from the position of the locking ball 24 on the inner diameter surface of the main body portion 20. As shown in FIGS. 2C and 3, in the connected state, the first seal member 61 contacts the outer peripheral surface of the connection portion 51 (the outer peripheral surface of the first annular portion 55) from the radially outer side. The space formed between the inner peripheral surface of the main body 20 and the outer peripheral surface of the connecting portion 51 is a space closer to the joint proximal end than the position where the first seal member 61 is disposed, and closer to the joint distal end than the position. Airtight sealing of communication with the space. The details of the configuration of the first seal member 61 will be described in the description of the “coupling member holding state suppressing mechanism” described later.

  On the other hand, as shown in FIG. 1, the third seal member 66 is a substantially annular member disposed in a groove portion formed along the circumferential direction on the outer peripheral surface of the main body portion 20. The third seal member 66 is in contact with the inner peripheral surface of the sleeve portion 30 from the radially inner side, and the space formed between the outer peripheral surface of the main body portion 20 and the inner peripheral surface of the sleeve portion 30 is as follows. The communication between the space closer to the joint proximal end than the position where the third seal member 66 is disposed and the space closer to the joint distal end than the position are hermetically sealed.

  Such first seal member 61 and third seal member 66 are made of, for example, a rubber material. In the present embodiment, as shown in FIG. 1, the first seal member 61 is a rubber member (a rubber ring, a rubber packing, etc.) having a substantially T-shaped cross section orthogonal to the circumferential direction. As shown in FIG. 3, it contacts the outer peripheral surface of the connection part 51 in the bent state. On the other hand, the third seal member 66 is a rubber member (a rubber ring, a rubber packing, or the like) having a substantially U-shaped cross section orthogonal to the circumferential direction.

1-2. As shown in FIG. 1, the operating portion 80 is configured to be movable in the axial direction with respect to the main body portion 20 at the inner peripheral portion of the main body portion 20, and to the main body portion 20. It is a substantially cylindrical member that is biased toward the joint tip side. As shown in FIG. 1, the actuating portion 80 is biased toward the joint distal end side with respect to the main body portion 20 by the first coil spring 81 and is a substantially annular second seal member that abuts against the distal end of the connecting portion 51. 65 is provided at the end of the joint tip side. Protrusion of the actuating portion 80 toward the joint distal end due to the urging force of the first coil spring 81 is prevented by a protruding portion 27 provided on the main body portion 20 as will be described later. As shown in FIGS. 2C and 3, the second seal member 65 abuts against the plug tip side end portion of the connection portion 51 in the connected state, and a space between the connection portion 51 and the operating portion 80. As for, the communication between the space radially inward from the position where the second seal member 65 is disposed and the space radially outward from the position is hermetically sealed. The second seal member 65 is made of, for example, a rubber material. In the present embodiment, as shown in FIG. 1, the second seal member 65 is a rubber member (rubber ring, rubber packing, etc.) having a substantially U-shaped cross section perpendicular to the circumferential direction.

  The axial position of the operating portion 80 with respect to the main body portion 20 is determined according to the state relating to the connection of the joint member 1 to the plug 50. That is, as shown in FIG. 1, in the non-connected state, the operating part 80 is located on the joint tip side. Hereinafter, the position in the axial direction of the operating portion 80 in this state is referred to as “non-connection position”. In the non-connected position, the outer peripheral surface of the tip of the operating portion 80 abuts against the locking ball 24 from the radially inner side. As a result, the locking ball 24 protrudes radially outward from the outer peripheral surface of the main body portion 20, and movement of the sleeve portion 30 relative to the main body portion 20 toward the joint distal end side is restricted. The operating portion 80 has a contact portion 82 that contacts the protruding portion 27 formed on the inner peripheral surface of the main body portion 20. As a result, when the abutting portion 82 abuts on the projecting portion 27, that is, when the abutting portion 82 abuts on the projecting portion 27 by the urging force of the first coil spring 81, The movement toward the joint tip side is restricted.

  On the other hand, as shown in FIGS. 2C and 3, in the connected state, the operating portion 80 is located on the joint proximal end side. Hereinafter, the axial position of the operating portion 80 in this state is referred to as a “connection position”. Since the urging force of the first coil spring 81 acts on the operating portion 80 located at the connection position, the operating portion 80 presses the connecting portion 51 toward the joint tip side by the urging force of the first coil spring 81. In this connection state, the connection portion 51 is restricted from moving in the axial direction with respect to the main body portion 20 by the plug lock mechanism 22. As a result, the second seal member 65 is pressed against the joint distal end side with respect to the connection portion 51 fixed to the main body portion 20, and the connection portion 51 by the second seal member 65 and the operating portion 80 are connected. It is possible to make a good seal in the space between. Therefore, the gas supplied from the plug 50 can be prevented from leaking to the external space, and the gas supplied from the plug 50 can be favorably guided to the base end side of the main body portion 20. In the present embodiment, in addition to the second seal member 65, the first seal member 61, the third seal member 66, and the fourth seal member 67 described later are provided, so Even when the sealing performance of the second seal member 65 in the space formed in the space is deteriorated due to foreign matter contamination, aging deterioration, or the like, the leakage of gas to the external space of the joint member 1 is suppressed.

  In addition, as shown in FIG. 2B, in the intermediate state, the operating unit 80 is a position between the non-connection position and the connection position, and is determined according to the degree of entry of the connection part 51 into the main body part 20. Located in position. In this intermediate state, as in the connection state, the second seal member 65 abuts on the plug tip side end of the connection portion 51, so that the operating portion 80 causes the connection portion 51 to be moved to the joint tip side by the biasing force of the first coil spring 81. Press on. Then, as the connecting portion 51 enters deeper into the main body portion 20, the axial position of the operating portion 80 moves to the connecting position side.

1-3. Configuration of Cover Part The cover part 40 is a substantially cylindrical member fixed to the outer side in the radial direction of the main body part 20 as shown in FIG. The cover portion 40 is used to hold the joint member 1 when the joint member 1 is connected to the plug 50. In the present invention, the cover portion 40 is used to generate a connection sound. A pronunciation abutting portion 4 is formed. In the present embodiment, the cover portion 40 is fixed on the base end side of the main body portion 20 and is integrated with the main body portion 20.

  In the present embodiment, as shown in FIG. 1, the cover portion 40 is formed so as to slightly increase in diameter as a whole from the proximal end side toward the distal end side. In accordance with such a shape, the inner peripheral surface of the cover portion 40 is formed with an enlarged diameter portion that gradually increases in diameter toward the distal end side, and between the enlarged diameter portion and the outer peripheral surface of the main body portion 20. The second coil spring 35 is disposed in the space formed in the above. As will be described later, the second coil spring 35 is for biasing the sleeve portion 30 from the joint proximal end side of the main body portion 20 to the joint distal end side.

  Moreover, the cover part 40 is provided with the coating | coated part 42 which covers at least one part of the sleeve part 30 from a radial direction outer side. Thereby, it is suppressed that the magnitude | size of the cover part 40 hold | maintained at the operator at the time of connection operation is limited small. In the present embodiment, the covering portion 42 is configured to cover a part of the proximal end side of the sleeve portion 30. The covering portion 42 is formed so that the diameter of the inner peripheral surface is substantially uniform in the axial direction, and protrudes radially inward from the inner peripheral surface at a predetermined axial position on the joint tip side. A shaped portion 41 is provided.

  In this example, the protruding portion 41 is uniformly formed over the entire circumferential direction on the inner peripheral surface of the cover portion 40. And, as shown in FIG. 1, the protruding portion 41 is configured such that the shape of the cross section orthogonal to the circumferential direction is reduced as a whole in the axial width from the radially outer side toward the radially inner side, The end surface on the joint base end side from the radially inner end of the protruding portion 41 is a cover-side sounding contact portion 43. That is, in the present embodiment, the cover-side sound generation contact portion 43 is formed by the protruding portion 41. Although details will be described later, the cover-side sounding contact part 43 and the sleeve-side sounding contact part 33, which will be described later, generate a sounding contact for generating a connection sound that informs the completion of the connection operation of the joint member 1 to the plug 50. The portion 4 is formed between the sleeve portion 30 and the cover portion 40. By forming the sound generation contact portion 4 in the portion covered with the cover portion 40 in this way, the sound generation contact portion 4 is protected by the cover portion 40 and the sound generation contact portion 4 is prevented from being damaged. It has a configuration.

1-4. Configuration of Sleeve Part The sleeve part 30 is a substantially cylindrical member that is movable in the axial direction at the outer peripheral portion of the main body part 20. In the present embodiment, the sleeve part 30 includes an inclined surface 32 and a retraction part 34. The sleeve portion 30 is biased from the joint proximal end side of the main body portion 20 to the joint distal end side by the second coil spring 35 provided in the joint member 1.

  As described above, in the disconnected state (see FIGS. 1 and 2A) and the intermediate state (see FIG. 2B), the locking ball 24 is radially outward with respect to the outer peripheral surface of the main body portion 20. In a protruding state, the movement of the sleeve portion 30 relative to the main body portion 20 toward the joint distal end side is restricted. In order to realize such a configuration, the sleeve portion 30 is provided with an inclined surface 32. In the non-connected state and the intermediate state, the inclined surface 32 abuts against the locking ball 24, whereby the movement of the sleeve portion 30 toward the joint distal end side is restricted. That is, in the non-connected state and the intermediate state, the sleeve portion 30 urged toward the joint distal end side by the second coil spring 35 has the inclined surface 32 and the locking ball 24 as shown in FIG. 1 and FIG. Is positioned at a position where the two come into contact with each other. This position is a position retracted to the joint proximal end side from the position of the sleeve portion 30 in the connected state. That is, in the non-connected state in which the relative movement in the axial direction between the plug 50 and the main body portion 20 is allowed and the movement of the sleeve portion 30 to the joint distal end side with respect to the main body portion 20 is restricted by the plug lock mechanism 22. Is configured to retreat to the joint proximal end side. In this state, as shown in FIG. 1 and FIG. 2A, the sleeve portion 30 is located at a position where the joint tip side end face is substantially the same as the main body portion 20.

  On the other hand, in the connected state (see FIG. 2C and FIG. 3), the locking ball 24 is fitted into the locking recess 53 and protrudes radially inward with respect to the inner peripheral surface of the main body 20. Therefore, the movement of the sleeve portion 30 toward the joint distal end side is not restricted by the plug lock mechanism 22. Further, the sleeve portion 30 is formed with a sleeve-side sounding contact portion 33 that contacts the protrusion 41 described above. In the connected state, as shown in FIGS. 2C and 3, the sleeve portion 30 that is urged toward the joint tip side by the second coil spring 35 has a sleeve-side sounding contact portion 33 and a cover-side sounding contact portion. 43 is positioned at a position where it contacts 43. Although a detailed description is omitted, when the intermediate state is switched to the connected state, the sleeve-side sound generation contact portion 33 has a predetermined speed determined by the urging force of the second coil spring 35 and has a predetermined speed. It abuts (collises) with the contact portion 43. The sound generated along with the contact is a connection sound that is generated when the main body unit 20 receives the connection unit 51, more precisely, when the connection operation is completed. Note that the position of the sleeve portion 30 in the connected state is a position protruding toward the joint distal end side from the position of the sleeve portion 30 in the non-connected state or the intermediate state. In other words, the sleeve portion 30 is configured to protrude toward the joint distal end side in a connected state where the relative movement in the axial direction between the plug 50 and the main body portion 20 is prevented by the plug lock mechanism 22. In this protruding state, the movement of the sleeve portion 30 toward the joint distal end side is restricted by the protruding portion 41 of the cover portion 40. As shown in FIGS. 2C and 3, the sleeve portion 30 externally fits the small-diameter portion 57 of the plug 50 in a state of protruding from the main body portion 20 toward the joint distal end side.

  Further, in the connected state, as described above, the inner peripheral surface of the sleeve portion 30 restricts the movement of the locking balls 24 outward in the radial direction, and the connected state is maintained. Therefore, when removing the joint member 1 from the plug 50, the sleeve portion 30 is moved to the joint base end side with respect to the main body portion 20 to position the inclined surface 32 on the radially outer side of the locking ball 24, thereby locking The ball 24 is removed from the locking recess 53. Thereby, the axial movement of the main body 20 with respect to the plug 50 is allowed, and the joint member 1 can be separated from the plug 50.

  By the way, as shown in FIG. 1, the retracting portion 34 included in the sleeve portion 30 is arranged in a partial region in the axial direction corresponding to the relative movement range of the protruding portion 41 with respect to the sleeve portion 30. It is formed by retreating inward in the radial direction. In the present embodiment, the retraction part 34 is also formed on the outer peripheral surface of the sleeve part 30 in the circumferential direction in accordance with the fact that the protruding part 41 is uniformly formed over the entire circumferential direction on the inner peripheral surface of the cover part 40. It is uniformly formed over the entire area. A sleeve-side sounding contact portion 33 is formed by the joint proximal end portion of the retraction portion 34. In this example, the surface facing the joint distal end side at the joint proximal end of the retraction part 34 is the sleeve side sounding contact part 33.

  The end part in the axial direction of the retraction part 34 is set as follows. That is, the axial position of the joint distal end of the retraction part 34 is the same axial position as the joint distal end of the cover 40 or the joint distal end of the cover 40 in the disconnected state. It is set so as to be the axial position on the joint distal end side. In the present embodiment, as shown in FIG. 1, the axial position of the joint distal end of the retraction part 34 is the axial position of the joint distal end from the joint distal end of the cover 40 in the disconnected state. The case where becomes is shown as an example.

  On the other hand, the axial position of the joint proximal end of the retraction part 34 is set so that the sleeve-side sounding contact part 33 can contact the cover-side sounding contact part 43 in the connected state. That is, in the state where the sleeve side sound generation contact portion 33 and the cover side sound generation contact portion 43 are in contact, the inclined surface 32 contacts the sleeve protrusion prevention portion 21, or the inclined surface 32 is from the sleeve protrusion prevention portion 21. It is set to be located on the joint proximal end side. In the present embodiment, as shown in FIG. 2C and FIG. 3, the inclined surface 32 is more than the sleeve protrusion preventing portion 21 in a state where the sleeve side sounding contact portion 33 and the cover side sounding contact portion 43 are in contact. It is located on the joint proximal end side, and is configured not to contact the sleeve protrusion prevention portion 21.

  In the present embodiment, the sleeve portion 30 includes a fourth seal member 67. The fourth seal member 67 is a substantially annular member disposed in a groove portion formed along the circumferential direction on the inner peripheral surface of the sleeve portion 30. The fourth seal member 67 is in contact with the outer peripheral surface of the main body portion 20 from the outside in the radial direction, and the space formed between the outer peripheral surface of the main body portion 20 and the inner peripheral surface of the sleeve portion 30 is The communication between the space at the joint proximal end side from the position where the 4 seal member 67 is disposed and the space at the joint distal end side from the position are hermetically sealed. Such a fourth seal member 67 is made of a rubber material or the like. In the present embodiment, as shown in FIG. 1, the fourth seal member 67 is a rubber member (rubber ring, rubber packing, etc.) having a substantially U-shaped cross section orthogonal to the circumferential direction.

2. Next, a suppression mechanism for a state in which the joint member 1 is held by the plug 50 (hereinafter simply referred to as a “joint member holding state”) although not in the connected state will be described. 4 and 5 are views showing a semi-connected state in which the tip of the plug 50 is in a non-connected state and the tip of the plug 50 is in contact with the tip of the second seal member 65. Specifically, it is a diagram showing a semi-connected state in which the distal end of the plug 50 comes into contact with the distal end of the second seal member 65, which is reached through a connection release operation that is a transition from the connected state to the disconnected state. In the connection release operation, the sleeve portion 30 is moved toward the joint proximal end side with respect to the main body portion 20 so that the lock ball 24 is detached from the lock recess portion 53 and the joint member 1 is separated from the plug 50. It is an operation. As shown in FIG. 5, in the present embodiment, the first seal member 61 is formed in a substantially annular seal body 62 fixed to the body 20, and protrudes radially inward from the seal body 62. A substantially annular radial projecting portion 63 is provided, and in a natural state where deformation is not caused, the cross-sectional shape orthogonal to the circumferential direction is substantially T-shaped. In the present embodiment, the entire first seal member 61 including the radial protrusion 63 is made of a flexible material. The end of the radial protrusion 63 opposite to the seal main body 62 constitutes a seal tip 64 as an inner diameter portion of the first seal member 61.

  As shown in FIG. 7, in the present embodiment, the first seal member 61 is configured such that the axial width W2 of the seal tip 64 is the axial width of the opening of the locking recess 53 in a natural state where the first seal member 61 is not deformed. It is formed smaller than W1 and is configured such that the radial position of the seal tip 64 is on the outer diameter side of the second radial position R2 and on the inner diameter side of the third radial position R3. ing. Here, the second radial position R2 is a radial position where the bottom of the locking recess 53 is located in the main body 20 in the connected state. Further, the third radial position R3 is both a first radial position R1 and a second radial position R2 that are radial positions where the outer peripheral surface of the connection portion 51 is located in the main body portion 20 in the connected state. Is a radial position that is substantially evenly spaced from each other. Therefore, in the present embodiment, when the transition from the connected state to the semi-connected state or the transition from the semi-connected state to the connected state occurs, the seal tip portion 64 of the first seal member 61 enters near the bottom of the locking recess 53. .

  As shown in FIG. 5, the seal front end portion 64 of the first seal member 61 is configured to abut on the outer peripheral surface of the second annular portion 56 in the half-connected state. That is, the inner diameter portion of the first seal member 61 in the semi-connected state in which the distal end of the plug 50 is still in contact with the distal end of the second seal member 65, which is reached through a connection release operation that is a transition from the connected state to the disconnected state. (In this example, the seal front end portion 64) comes into contact with the contact surface that is the outer peripheral surface of the connection portion (in this example, the outer peripheral surface of the second annular portion 56) located closer to the plug front end than the locking recess 53. It is configured. Thereby, although it is not a connection state, generation | occurrence | production of the state (joint member holding state) where the joint member 1 is hold | maintained at the plug 50 can be suppressed.

  Hereinafter, the reason why the occurrence of the joint member holding state is suppressed will be supplementarily described with reference to the comparative example of FIG. FIG. 6 is a view showing a comparative example for explaining a state in which the joint member 1 which is the subject of the present application is held by the plug 50. As a result of diligent research, the inventors have found that the inner diameter portion of the first seal member 61 (in this example, the seal tip 64) enters the locking recess 53 as shown in FIG. It was found that the joint member holding state occurs under the circumstances. Under such circumstances, the seal tip 64 of the first seal member 61 enters the locking recess 53 over the entire circumference and is in contact with the inner surface of the locking recess 53. 20) and the force required for relative movement between the plug 50 (connecting portion 51) is increased. If the force against the urging force of the first coil spring 81 to the joint distal end side is not applied, the operating portion 80 that abuts the distal end of the plug 50 via the second seal member 65 is connected to the main body portion 20 with the joint. Does not move to the proximal side. Therefore, under the above situation, the joint member 1 is held by the plug 50 via the first seal member 61 and the second seal member 65.

  On the other hand, in this embodiment, as shown in FIG. 5, the inner diameter portion of the first seal member 61 (in this example, the seal front end portion 64) is positioned closer to the plug front end than the locking recess 53 in the half-connected state. The joint member holding state is prevented from being generated by being configured to contact the outer peripheral surface of the connecting portion (in this example, the outer peripheral surface of the second annular portion 56). This is because the joint member 1 (main body portion 20) and the plug 50 (connection) are connected in the configuration shown in FIG. 5 as compared with the case where the seal tip 64 of the first seal member 61 enters the locking recess 53 as shown in FIG. This is because the force required for the relative movement with respect to the portion 51) is reduced, and the joint member 1 can be easily detached from the plug 50 by gravity or the like even if no particularly large force is applied to the joint member 1.

  In the configuration as shown in FIG. 5, in the transition process from the connected state to the semi-connected state, or in the transition process from the semi-connected state to the connected state, the seal tip 64 of the first seal member 61 is the locking recess. 53, but the state is not maintained. This is because, in these transition processes (intermediate state), the operating unit 80 is located between the non-connection position and the connection position. That is, in this state, since the urging force of the first coil spring 81 toward the joint tip side acts on the connecting portion 50 via the operating portion 80, the connecting portion 50 is not limited to the position, and the urging force is applied to the main body. This is because the first seal member 61 moves out of the locking recess 53 with the movement toward the joint distal end side with respect to the portion 20.

  Although not shown, as described above, the semi-connected state in which the tip of the plug 50 is brought into contact with the tip of the second seal member 65 is reached through a connection release operation that is a transition from the connected state to the non-connected state. In this case, the seal tip portion 64 of the first seal member 61 is configured to be in contact with the contact surface that is the outer peripheral surface of the second annular portion 56 located on the plug tip side with respect to the locking recess portion 53, thereby being disconnected. Even in the semi-connected state that is reached in the process of the connection operation that is the transition from the state to the connected state, it is possible to suppress the occurrence of the joint member holding state. In the connection operation, the connecting portion 51 of the plug 50 is received in the body portion 20 in the axial direction from the joint distal end side, thereby pushing the operating portion 80 toward the joint proximal end side, and the locking ball 24 to the locking recess 53. It is an operation for fitting in. In the semi-connected state reached in the process of the connecting operation, as shown in FIG. 2B, the seal distal end portion 64 bends toward the joint proximal end side, whereas the semi-connected state reached through the connection releasing operation. Then, as shown in FIG. 5, since the seal tip 64 bends toward the joint tip, the seal tip 64 moves closer to the plug tip than the locking recess 53 in the half-connected state reached through the connection release operation. As long as it abuts on the outer peripheral surface of the second annular portion 56 positioned, the seal distal end portion 64 is located closer to the plug distal end than the locking recess even in the semi-connected state reached in the connection operation. This is because it abuts on the outer peripheral surface of the plug and the plug tip of the connecting portion 51.

3. Other Embodiments (1) In the above-described embodiment, in the natural state where the first seal member 61 is not deformed, the axial width W2 of the seal tip 64 of the first seal member 61 is The case where it is formed smaller than the axial width W1 of the opening has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, in a natural state in which the first seal member 61 is not deformed, the axial width W2 of the seal tip 64 is substantially the same as the axial width W1 of the opening of the locking recess 53. In addition, it is one of the preferred embodiments of the present invention to have a configuration that is larger than the axial width W1.

(2) In the above-described embodiment, the first seal member 61 includes the substantially annular seal body 62 fixed to the body 20, and the substantially annular shape that protrudes radially inward from the seal body 62. A case has been described in which the first seal member 61 including the radial protrusion 63 is made of a flexible material. However, the embodiment of the present invention is not limited to this. Therefore, for example, it is also a preferred embodiment of the present invention that only the radial protrusion 63 is made of a flexible material. The first seal member 61 includes a seal body 62 and a radial protrusion 63, and is configured so that a cross-sectional shape orthogonal to the circumferential direction is substantially T-shaped in a natural state where the first seal member 61 is not deformed. It is not limited to what is being done. Therefore, for example, the shape of the cross section perpendicular to the circumferential direction of the first seal member 61 is round (for example, an O-ring), square, X-shaped, D-shaped, U-shaped, V-shaped, L Any shape such as a letter shape or a Y shape can be adopted.

(3) In the above embodiment, the case where all of the first seal member 61, the second seal member 65, the third seal member 66, and the fourth seal member 67 are rubber members formed in a substantially annular shape. Described as an example. However, the embodiment of the present invention is not limited to this, and it is also preferable to employ materials other than rubber as the material of these seal members.

(4) The shape in the cross section orthogonal to the circumferential direction of the second seal member 65, the third seal member 66, and the fourth seal member 67 in the above embodiment is merely an example, and the second seal member 65, the third seal The shape of the cross section orthogonal to the circumferential direction of the member 66 and the fourth seal member 67 is round (for example, an O-ring), square, X-shaped, D-shaped, T-shaped, U-shaped, V Any shape such as a letter shape, an L shape, and a Y shape can be employed.

(5) In the above-described embodiment, in the natural state where the first seal member 61 is not deformed, the radial position of the seal distal end portion 64 of the first seal member 61 is larger in outer diameter than the second radial position R2. As an example, a case has been described in which it is configured to be closer to the inner diameter side than the third radial position R3. However, the embodiment of the present invention is not limited to this. Therefore, for example, the radial position of the seal tip portion 64 of the first seal member 61 is on the outer diameter side of the third radial position R3 in a natural state where the first seal member 61 is not deformed. It is one of the preferred embodiments of the present invention that the inner diameter side of the first radial position R1 is adopted. Further, in a natural state in which the first seal member 61 is not deformed, the radial position of the seal tip 64 of the first seal member 61 is substantially the same as the second radial position R2, or the second diameter It is also suitable as a configuration on the inner diameter side with respect to the direction position R2.

(6) In the above embodiment, the case where the cover portion 40 includes the protruding portion 41 and the sleeve portion 30 includes the retracting portion 34 has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, the cover portion 40 does not include the protruding portion 41, the sleeve portion 30 does not include the retraction portion 34, and the sound generation contact portion 4 is not formed between the cover portion 40 and the sleeve portion 30. This is also one of the preferred embodiments of the present invention. In this case, the movement of the sleeve portion 30 toward the joint distal end side in the connected state is restricted by the sleeve protrusion prevention portion 21 of the main body portion 20, and the connection sound is generated by the contact between the inclined surface 32 and the sleeve protrusion prevention portion 21. It will be.

(7) In the embodiment described above, the inclined surface 32 is positioned closer to the joint base end side than the sleeve protrusion preventing portion 21 in a state where the sleeve side sound generation contact portion 33 and the cover side sound generation contact portion 43 are in contact with each other. The case where it was comprised so that it might not contact | abut to the said sleeve protrusion prevention part 21 was demonstrated as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, it is also preferable that the inclined surface 32 be in contact with the sleeve protrusion prevention portion 21 in a state where the sleeve side sound generation contact portion 33 and the cover side sound generation contact portion 43 are in contact. This is one of the embodiments. In this case, the connection sound is generated not only at the sound generation contact portion 4 but also at the contact portion between the inclined surface 32 and the sleeve protrusion prevention portion 21. Moreover, it is also preferable that the sleeve protrusion prevention portion 21 is configured not by an inclined surface whose normal direction intersects the axial direction but by a surface whose normal direction is parallel to the axial direction.

(8) In the above embodiment, the plug lock mechanism 22 includes the through hole 25 that connects the outer peripheral surface and the inner peripheral surface of the main body 20 formed at a predetermined position in the circumferential direction of the main body 20, and the through hole The case where the ball 25 for locking as a radial direction moving member attached to the radial direction movement member 25 is provided in FIG. However, the embodiment of the present invention is not limited to this, and a plug lock mechanism or a radially moving member having a different configuration can also be adopted.

(9) In the above embodiment, the locking recess 53 is a recess for inserting a part of the locking ball 24 in the connected state, and the groove shape has a substantially trapezoidal cross section perpendicular to the circumferential direction. The case of being a part has been described as an example. However, the embodiment of the present invention is not limited to this, and the configuration of the locking recess 53 is such that the cross-sectional shape orthogonal to the circumferential direction of the locking recess 53 is a substantially triangular shape. The shape can be appropriately changed according to the shape of the plug lock mechanism 22.

(10) In the above-described embodiment, the case where the second seal member 65 is disposed at the end of the operating portion 80 on the joint distal end side has been described as an example. However, the embodiment of the present invention is not limited to this, and a configuration in which the second seal member 65 is disposed at the end portion on the plug distal end side of the connection portion 51 is also preferable. This is one of the embodiments.

(11) In the above embodiment, the third seal member 66 is disposed in the circumferential groove formed on the outer peripheral surface of the main body portion 20, and the fourth seal member 67 is formed on the inner peripheral surface of the sleeve portion 30. The case where it was arrange | positioned in the groove part along the circumferential direction made was demonstrated as an example. However, the embodiment of the present invention is not limited to this. Accordingly, for example, the third seal member 66 is arranged in a groove portion along the circumferential direction formed on the inner peripheral surface of the sleeve portion 30, or the fourth seal member 67 is formed on the outer peripheral surface of the main body portion 20. It is also one of preferred embodiments of the present invention to have a configuration in which the groove is disposed along the circumferential direction. In addition, a configuration including only one of the third seal member 66 and the fourth seal member 67 or a configuration not including both the third seal member 66 and the fourth seal member 67 is also suitable.

(12) In the above embodiment, the case where the first coil spring 81 is a biasing mechanism that biases the operating portion toward the joint distal end side has been described as an example. However, the embodiment of the present invention is not limited to this, and it is one of the preferred embodiments of the present invention to employ a biasing mechanism other than the coil spring.

(13) In the above embodiment, the case where gas is supplied from the plug 50 to the joint member 1 has been described as an example. However, the embodiment of the present invention is not limited to this, and a configuration in which gas is supplied from the joint member 1 to the plug 50 is also a preferred embodiment of the present invention. In this case, the main body portion 20 of the joint member 1 is configured not to include the pressing member 26, or the gas flow state in the joint member 1 is set to an open state and a closed state depending on an axial position of the operating portion 80 with respect to the main body portion 20. It is preferable that the configuration switches between the two.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a joint member provided with a seal member that comes into contact with the connecting portion of the plug from the radially outer side.

1: Joint member 20: Main body 22: Plug lock mechanism 24: Locking ball (radially moving member)
25: Through-hole 50: Plug 51: Connection portion 53: Locking recess 61: First seal member 62: Seal body portion 63: Radial protrusion portion 64: Seal tip portion 65: Second seal member 80: Actuating portion 81: First coil spring (biasing mechanism)
R1: first radial position R2: second radial position R3: third radial position W1: axial width W2 of the seal tip portion: axial width of the opening of the locking recess

Claims (5)

A substantially cylindrical main body portion that receives the plug connection portion in the axial direction from the joint distal end side, and is configured to be movable in the axial direction at the inner peripheral portion of the main body portion. A substantially cylindrical working part,
When the main body portion receives the plug, the main body portion moves toward the inner diameter side to restrict axial movement of the main body portion with respect to the plug, and when the plug is detached from the main body portion, A plug lock mechanism having a radially moving member that is restricted from moving toward the inner diameter side,
The main body portion receives the connecting portion, the operating portion is moved to the joint proximal end side, and the radial movement member moves to the inner diameter side to fall into a locking recess provided in the connecting portion, A connection state in which relative movement in the axial direction between the plug and the main body is prevented; and
The plug is detached from the main body portion, and the operation portion is moved to the joint tip side, and the radial movement member is configured to be selectable in a non-connected state in which movement to the inner diameter side is prevented,
The main body includes a first seal member that is in contact with the outer peripheral surface of the connecting portion from the radially outer side on the inner diameter surface on the joint distal end side from the position of the radial movement member in the axial direction, A second seal member that contacts the tip of the connecting portion;
In the non-connected state, and in a semi-connected state where the tip of the plug is in contact with the tip of the second seal member,
A joint member in which an inner diameter portion of the first seal member comes into contact with a contact surface that is an outer peripheral surface of a connection portion located on a plug tip side from the locking recess. In the semi-connected state in which the tip of the plug comes into contact with the tip of the second seal member, which is reached through a connection release operation that is a transition from the connected state to the non-connected state,
2. The joint member according to claim 1, wherein an inner diameter portion of the first seal member abuts on a contact surface that is an outer peripheral surface of a connection portion located on a plug tip side from the locking recess. The first seal member includes a substantially annular seal body that is fixed to the body, and a substantially annular radial protrusion that protrudes radially inward from the seal body. An end portion of the direction protruding portion opposite to the seal main body portion constitutes a seal tip portion as an inner diameter portion of the first seal member,
The radial protrusion is made of a flexible material,
3. The joint according to claim 1, wherein in a natural state in which the first seal member is not deformed, an axial width of the seal tip is formed smaller than an axial width of the opening of the locking recess. Element. In the connected state, the radial position where the outer peripheral surface of the connecting portion is located in the main body portion is set as a first radial position, and the radial position where the bottom portion of the locking recess is located is a second radial position. Furthermore, a radial position that is substantially evenly spaced from both the first radial position and the second radial position is defined as a third radial position,
In a natural state in which the first seal member is not deformed, the radial position of the seal tip is on the outer diameter side than the second radial position and is on the inner diameter side than the third radial position. The joint member according to claim 3. The plug lock mechanism is mounted in a through hole that is formed at a predetermined position in the circumferential direction of the main body portion and communicates with an outer peripheral surface and an inner peripheral surface of the main body portion, and is mounted in the through hole so as to be movable in a radial direction. Including a locking ball as a radially moving member,
The joint member according to any one of claims 1 to 4, wherein the locking recess is a recess for inserting a part of the locking ball in the connected state.

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