JP7209252B2 - joint - Google Patents

Description

The present invention relates to a joint for connecting pipes.

2. Description of the Related Art Conventionally, joints used for connecting pipes (connected pipes) are known. Such a joint is provided with a mechanism for suppressing withdrawal of the connected pipe that has been inserted.
For example, in Patent Document 1 below, a holding piece having a biting piece that bites into the outer periphery of an inserted tube and a holding piece that bites into the outer periphery of an inserted tube, and an operating surface that is pushed when the tube is removed are disclosed in Patent Document 1 below. A pipe joint is disclosed that includes a releasing operating member.

JP 2011-220467 A

However, with the pipe joint disclosed in Patent Document 1, it is necessary to push the operation member when removing the tube, and further improvement is desired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint capable of preventing the connected pipe from being pulled out and improving workability when the pipe is pulled out.

In order to achieve the above object, a joint according to the present invention comprises a first cylindrical member having a receiving port provided at a first end in the axial direction; A second cylindrical member provided with an insertion port into which an end of a connected pipe is inserted on a direction first end side ; a removal prevention member held at a removal suppression position and a removal-allowed position allowing removal so as to be movable in a generally radial direction with respect to the second cylindrical member, wherein the removal prevention member includes the removal prevention member. In the restrained position, the tip portion is arranged to protrude from the inner peripheral surface of the second cylindrical member in the axial direction toward the axial center side, and is brought into contact with the outer peripheral surface of the connected pipe so as to bite. is provided, and the second cylindrical member has a lock position that prevents the removal prevention member from moving to the removal-enabled position and the movement of the removal prevention member to the removal-enabled position. It is characterized in that it is movable relative to the first tubular member to an unlocked position that allows it, and is held by the first tubular member at each position.

Since the joint according to the present invention is configured as described above, it is possible to prevent the connected pipe that has been inserted from being pulled out, and at the same time, it is possible to improve the workability at the time of pulling it out.

(a), (b) is a schematic perspective view which shows typically an example of the joint which concerns on one Embodiment of this invention. It is a schematic exploded perspective view of the joint. It is a schematic exploded perspective view of the joint. (a) is a schematic rear view of the joint, (b) is a schematic rear view showing an example of a first tubular member provided in the joint, and (c) is a second tubular member provided in the joint. FIG. 4 is a schematic rear view schematically showing an example of a member and a protective member; 4A is a schematic side view of the joint, and FIG. 4B is a schematic longitudinal sectional view corresponding to the line X1-X1 in FIG. 4A. (a) and (b) are schematic longitudinal sectional views corresponding to FIG. 5(b). (a) is a schematic side view of the joint, and (b) is a schematic vertical cross-sectional view corresponding to the X2-X2 arrow view in (a). (a) is a schematic side view of the same joint, and (b) is a schematic vertical cross-sectional view corresponding to the X3-X3 line arrow view in (a). (a) and (b) are schematic perspective views schematically showing an example of a joint according to another embodiment of the present invention. It is a schematic exploded perspective view of the joint. It is a schematic exploded perspective view of the joint. (a) is a schematic longitudinal sectional view corresponding to FIG. 5(b), and (b) is a schematic longitudinal sectional view corresponding to FIG. 8(b).

An embodiment of the present invention will be described below with reference to the drawings.
It should be noted that some of the detailed reference numerals attached to other drawings are omitted in some of the drawings.
1 to 8 are diagrams schematically showing an example of the joint according to the first embodiment.
As shown in FIGS. 1 and 5, the joint 1 according to the present embodiment includes an outer cylindrical member 30 that constitutes a first cylindrical member provided with a receiving port 31 on the axial first end side. Further, the joint 1 is a second cylindrical member which is received in the receiving port 31 of the outer cylindrical member 30 and provided with an insertion port 21 into which the end portion 9 of the connected pipe 8 is inserted on the first end side in the axial direction. is provided with an inner cylindrical member 20 that constitutes the The joint body 2 of the joint 1 is composed of the inner cylinder member 20 and the outer cylinder member 30 .

The connected pipe 8 connected to the joint 1 may be made of an appropriate material according to the type of fluid to be passed through the connected pipe 8 or the like. For example, the connected pipe 8 may be a resin pipe mainly made of a synthetic resin material such as polyvinyl chloride resin, or a metal pipe made of a metal material such as stainless steel. Further, the connected pipe 8 may be used as a pipe through which liquid such as water or gas such as gas passes, and may constitute, for example, a drain pipe having a relatively large diameter.
Further, an appropriate tubular member may be fixedly provided on the axial second end side of the joint 1 . Further, the axial second end portions of the two joints 1, 1 according to the present embodiment may be connected to each other by an appropriate tubular member. For example, the axial second ends of the two joints 1, 1 may be connected to each other by an elbow-shaped or flexible tubular member.

In addition, the joint 1 in this embodiment includes a protective member 10 that is axially movable with respect to the inner cylindrical member 20 . The protective member 10 is axially movable with respect to the inner cylindrical member 20 between an initial position on the first axial end side and a connection completion position on the second axial end side. When it reaches the connection completion position by being pushed by the connected pipe 8 inserted therein, it constitutes a notification member that notifies the connection completion state. With such a configuration, the operator can be made to recognize that the connected pipe 8 has been inserted to a predetermined position and the connection has been completed.
Further, in this embodiment, the outer cylinder member 30, which will be described later, is rotatable about the axis with respect to the inner cylinder member 20, and the protection member 10 is connected with the rotation relative to the inner cylinder member 20 in one direction. It is configured to function as an operating member that moves from the completed position toward the initial position. With such a configuration, by rotating the outer cylinder member 30 relative to the inner cylinder member 20, the protection member 10 that has been set to the connection completion position can be easily returned to the initial position. As a result, when reconnecting the connected pipe 8 to the joint 1, workability can be improved as compared with the case where the protective member 10 needs to be disassembled and returned to its initial position.

The joint 1 also includes a seal member (peripheral surface seal member) 19 provided on the inner peripheral side of the inner cylindrical member 20 .
The protective member 10 can move from a protective position covering the peripheral seal member 19 to an exposed position where the peripheral seal member 19 can be exposed and brought into close contact with the outer peripheral surface 8 a of the connected pipe 8 . The protection member 10 includes a pushed portion 15 provided on the second axial end side and pushed toward the exposed position by the end portion 9 of the connected pipe 8 , and a first axial portion of the pushed portion 15 . and a cylindrical portion 11 that is provided on the end side and covers the peripheral surface seal member 19 . With such a configuration, when the connected pipe 8 is inserted, the peripheral seal member 19 is covered with the protection member 10 in the protective position, so that the tip of the connected pipe 8 is It can be inserted in a non-contact state against the peripheral surface seal member 19, and damage, twisting, etc. of the peripheral surface seal member 19 can be prevented. In this embodiment, the protective position of the protective member 10 is the initial position on the first axial end side, and the exposed position of the protective member 10 is the connection completion position on the second axial end side. That is, the initial position is a state in which the peripheral seal member 19 is protected by the protective member 10, and the connection completed position is a state in which the peripheral seal member 19 is exposed and can be in close contact with the outer peripheral surface 8a of the connected pipe 8. It is said that With such a configuration, when the protection member 10 constituting the notification member reaches the connection completion position (exposed position), a notification is given, so that the operator can be made to recognize that the properly sealed state has been established. .

In addition, the inner diameter of the cylindrical portion 11 is made larger than the outer diameter of the connected pipe 8, and the outer diameter of the first axial end portion of the cylindrical portion 11 including the portion covering the peripheral surface seal member 19 is set to the inner diameter of the inner cylindrical member. The inner diameter of the recessed stepped portion 24, which will be described later, is smaller than the portion in which the cylindrical portion 11 of 20 moves in the axial direction. With such a configuration, the connected pipe 8 can be easily inserted into the tubular portion 11 of the protective member 10 that protects the peripheral seal member 19 . In addition, the protection member 10 can be easily moved with respect to the inner cylindrical member 20 together with the connected pipe 8, and the load required when inserting the connected pipe 8 (insertion load) can be reduced.
As shown in FIGS. 2 and 3, the cylindrical portion 11 of the protective member 10 has a substantially cylindrical shape penetrating in the axial direction. The inner diameter of the tubular portion 11 refers to the inner diameter of the smallest diameter portion of the tubular portion 11. In the present embodiment, as shown in FIG. It has the same diameter over substantially the entirety. With such a configuration, when inserting the connected pipe 8, it is easier to insert the connected pipe 8 than in the case where the cylindrical portion 11 has a projecting step portion, a recessed step portion, a bent portion, etc. It is possible to further improve the insertability of the connected pipe 8 into the cylindrical portion 11 without being caught. The inner diameter of the tubular portion 11 may be slightly larger than the outer diameter of the connected pipe 8 .

The cylindrical portion 11 has a chamfered inclined surface formed on the inner peripheral side edge of the axial first end portion on the insertion side of the connected pipe 8, and the axial direction first end portion is The inner diameter of the inner peripheral edge portion may be larger than the inner diameter of the second end in the axial direction. In other words, the tubular portion 11 may be provided with a portion at the first axial end portion which is larger than the inner diameter of the second axial end side. In this case, the dimension along the axial direction of the inclined surface of the inner peripheral side edge of the first axial end portion may be 1/4 or less of the dimension along the axial direction of the cylindrical portion 11 . The fact that the inner diameter of the tubular portion 11 is the same over substantially the entire axial direction may include the case where such an inclined surface is provided. Further, instead of making the inner diameter of the tubular portion 11 uniform over substantially the entire axial direction, the inner diameter slightly expands from the axial second end portion toward the axial first end portion. It may be in an open form.

Further, the outer diameter of the first axial end portion of the cylindrical portion 11 including the portion covering the peripheral surface seal member 19 indicates the outer diameter of the maximum diameter portion of the portion. The outer diameter of the first axial end portion of the portion 11 is made uniform over substantially the entirety of the first axial end portion in the axial direction. With such a configuration, there are a projecting stepped portion, a recessed stepped portion, a bent portion, and the like for crushing the peripheral surface seal member 19 in an axially intermediate portion on the outer peripheral side of the first axial end side portion of the tubular portion 11 . Compared to such a structure, the cylindrical portion 11 can be moved smoothly in the axial direction with respect to the peripheral surface seal member 19 . In addition, twisting of the peripheral seal member 19 can be suppressed more effectively. The outer diameter of the first end portion of the tubular portion 11 may be slightly smaller than the inner diameter of the portion of the inner cylindrical member 20 where the recessed stepped portion 24 is formed.
In addition, in the illustrated example, a chamfered inclined surface is provided on the outer peripheral side edge of the first axial end of the cylindrical portion 11, and the outer diameter of the outer peripheral side edge of the first axial end is reduced to the first axial direction. An example is shown in which the outer diameter is smaller than the outer diameter of the two ends. With such a configuration, when the protective member 10 is moved from the exposed position to the protected position as described later, the axial first end of the cylindrical portion 11 is less likely to be caught by the peripheral surface seal member 19 . can. In other words, the cylindrical portion 11 may be provided with a portion at the axial first end portion having a smaller outer diameter than the axial second end side. In this case, the dimension along the axial direction of the inclined surface of the outer peripheral side edge of the first axial end portion may be 1/4 or less of the dimension along the axial direction of the cylindrical portion 11 . The expression that the outer diameter of the first axial end portion of the cylindrical portion 11 is the same over substantially the entire axial direction includes the case where such an inclined surface is provided. good. It should be noted that a configuration in which such an inclined surface is not provided on the outer peripheral side edge of the first end in the axial direction of the cylindrical portion 11 may be employed.

The pressed portion 15 of the protective member 10 is provided in a continuous manner on the tubular portion 11 so as to protrude from the axial second end portion of the tubular portion 11 toward the axial center side. In the present embodiment, the pressed portion 15 is provided in an annular shape along the entire periphery of the axial second end portion of the cylindrical portion 11 (see also FIG. 4A). Note that instead of such a mode, a configuration in which the pressed portion 15 is provided only on a part of the peripheral edge of the axial second end portion of the tubular portion 11 may be employed.
The end surface of the end portion 9 of the connected pipe 8 is brought into contact with the surface of the pressed portion 15 facing the first end in the axial direction, and as the connected pipe 8 is inserted, the protective member 10 is moved to the second axial direction. It is moved toward the end side, that is, the exposed position (connection completion position).
Moreover, as shown in FIG. 6(b), the opening defined by the pressed portion 15 is formed on the second axial end side of the connected pipe 8 and the joint 1 in a state where the connected pipe 8 is connected. and are configured to communicate with each other. In addition, the inner diameter of the opening defined by the pressed portion 15 is substantially the same as the inner diameter of the connected pipe 8 and the axial second end portion of the joint 1 . Note that the inner diameter of the opening defined by the pressed portion 15, the inner diameter of the connected pipe 8, and the inner diameter of the axial second end portion of the joint 1 are not limited to substantially the same diameter, and are different. A diameter may be used.

Further, in the present embodiment, the engaging portion 13 of the protective member 10 and the inner cylinder member 20 constitutes a click mechanism that gives a click feeling when the protective member 10 reaches the exposed position where the peripheral surface seal member 19 is exposed. and an engaged portion 28 are provided. With such a configuration, the protective member 10 is at the exposed position, and the worker can sensuously (tactilely) recognize the state in which the peripheral surface seal member 19 is in close contact with the outer peripheral surface 8 a of the connected pipe 8 . . As a result, insufficient insertion and insufficient sealing can be suppressed, and the need to mark the connected pipe 8 with a marker or the like before insertion can be eliminated.
Further, in this embodiment, when the protective member 10 reaches the connection completion position, the engaging portion 13 engages with the engaged portion 28 of the inner cylindrical member 20 to give a click feeling, thereby indicating the connection completion state. It is configured to be notified. With such a configuration, even if the connection site is dark or noisy, compared to the case where the worker can visually or aurally recognize the connection completion state, the connection completion state can be sensed (tactilely). ) to make the operator aware of the connection completion state. That is, the engaging portion 13 and the engaged portion 28 constitute a click mechanism that gives a click feeling when the protective member 10 is at the exposed position and the connection completed position.

As shown in FIGS. 2 and 5B, the engaging portion 13 is provided on the outer peripheral edge portion of the axial second end portion of the tubular portion 11 . The engaging portion 13 has a substantially triangular shape (substantially mountain-like shape) that tapers toward the outer side in the radial direction when viewed in the circumferential direction. The engaged portion 28 of the inner cylindrical member 20 is provided at the distal end portion of a projecting piece portion 27 provided to extend from the axial second end portion of the inner cylindrical member 20 toward the axial second end side. there is The protruding piece 27 has a plate-like shape with its thickness extending along the radial direction. The engaged portion 28 is provided so as to protrude from the distal end portion of the projecting piece portion 27 toward the axial center side, and has a substantially triangular shape (substantially mountain-like shape) that tapers toward the axial center side when viewed in the circumferential direction. ).
As shown in FIGS. 6A and 6B, the engaging portion 13 of the protective member 10 moving the engaged portion 28 toward the exposed position (connection completion position) causes elastic deformation of the projecting piece portion 27. As shown in FIGS. A click feeling is given when moving to get over with. Similarly, when the protective member 10 moves toward the protective position (initial position), the engaging portion 13 overcomes the engaged portion 28 with the elastic deformation of the protruding portion 27, and the protective member 10 moves to the protective position. (initial position). A space is provided on the radially outer side of the protruding piece 27 to allow the radially outward elastic deformation of the protruding piece 27 .

Further, the protective member 10 is provided with a concave portion 12 for receiving the engaged portion 28 in the exposed position (connection completion position). The recess 12 is provided so as to be adjacent to the first end in the axial direction of the engaging portion 13 and open radially outward on the outer peripheral surface of the cylindrical portion 11 . In the illustrated example, the concave portion 12 is a hole penetrating through the cylindrical portion 11 in the thickness direction (radial direction).
Further, in this embodiment, as shown in FIGS. 2 and 3, the engaging portion 13 and the recessed portion 12 of the protective member 10 and the projecting portion 27 and the engaged portion 28 of the inner cylindrical member 20 are spaced apart in the circumferential direction. are provided at a plurality of locations (three locations in the example shown). Alternatively, only one engaging portion 13 and one concave portion 12 of the protective member 10 and one protruding piece portion 27 and one engaged portion 28 of the inner cylindrical member 20 may be provided.

In addition, as shown in FIGS. 2 and 3 , the protection member 10 is provided with a rotation restraint portion 14 that restrains rotation of the protection member 10 relative to the inner cylindrical member 20 about the axis. In the present embodiment, an example is shown in which the rotation suppressing portion 14 is a protrusion arranged along both circumferential sides of each projecting piece portion 27 . In other words, the protection member 10 is prevented from rotating about its axis relative to the inner cylinder member 20 by the rotation restraint portions 14, 14 on both circumferential sides of the projecting piece portion 27. As shown in FIG.
These anti-rotation portions 14, 14 on both sides protrude radially outward from the outer peripheral surface of the second axial end portion of the cylindrical portion 11, and extend axially along both side edges of each recess 12. provided to extend in the direction Further, in the example of the drawing, an example is shown in which a concave portion is provided at the proximal end portion of each projecting piece portion 27 to receive a portion of the rotation restraint portion 14 of the protective member 10 at the protective position. The rotation restraint portion 14 for restraining the rotation of the protection member 10 with respect to the inner cylindrical member 20 is not limited to the structure described above, and various other structures may be used.

As shown in FIGS. 2, 3, and 5B, the inner cylinder member 20 has a substantially cylindrical shape penetrating in the axial direction concentrically with the protection member 10 so as to enclose the protection member 10 therein. An opening of the inner cylindrical member 20 on the axial first end side constitutes an insertion port 21 of the joint 1 (joint main body 2).
In this embodiment, the inner cylinder member 20 is formed in a stepped shape on the axial second end side so that the inner diameter is larger than that on the axial direction first end side, and receives the tubular portion 11 of the protective member 10 . It has a configuration in which a recessed stepped portion 24 is provided. With such a configuration, the tip of the connected pipe 8 inserted from the first end in the axial direction, which is the side of the insertion port 21 , is less likely to be caught by the cylindrical portion 11 , and the connected pipe 8 with respect to the cylindrical portion 11 is less likely to be caught. Insertability can be further improved. In addition, the cylindrical portion 11 is stably attached to the inner cylindrical member 20 as compared with the case where the cylindrical portion 11 is arranged on the inner peripheral side of the inner cylindrical member 20 without providing such a recessed stepped portion 24 . can be moved.

The inner diameter of the first axial end portion of the inner cylindrical member 20 is set to correspond to the outer diameter of the connected pipe 8 . The inner diameter of the first axial end portion of the inner cylindrical member 20 may be slightly larger than the outer diameter of the connected pipe 8 . The inner diameter of the first axial end portion of the inner cylindrical member 20 is the same throughout substantially the entire axial direction. It should be noted that an appropriate chamfered inclined surface or the like may be provided on the periphery of the opening of the insertion port 21 .
The inner diameter of the second axial end portion of the inner cylindrical member 20 where the recessed stepped portion 24 is provided is set to the outer diameter of the cylindrical portion 11 (the rotation suppressing portion 14 is larger than the outer diameter of the cylindrical portion 11 so that the cylindrical portion 11 can be received). outside diameter of the removed part). In addition, the inner diameter of the axial second end portion of the inner cylindrical member 20 where the recessed stepped portion 24 is provided is substantially the same throughout the entire axial direction. In the present embodiment, the inner peripheral surface of the tubular portion 11 and the inner peripheral surface of the first axial end portion of the inner tubular member 20 are formed along the radial direction of the recessed stepped portion 24 so that they have substantially the same curved surface shape. An example in which the step size is approximately the same as the thickness size of the cylindrical portion 11 is shown. Further, as shown in FIG. 5(b), on the stepped wall surface facing the second axial end side of the recessed stepped portion 24, the cylindrical portion 11 of the protective member 10 positioned at the protective position has a first axial end side portion. are abutted or closely faced.

Further, in the present embodiment, the inner cylindrical member 20 is provided with a concave groove 25 for receiving the peripheral surface seal member 19 over the entire circumference. With such a configuration, it is possible to suppress movement, twisting, and the like of the peripheral seal member 19 when the tubular portion 11 is moved with respect to the peripheral seal member 19 . In addition, since the outer diameter of the first axial end portion of the cylindrical portion 11 is the same throughout substantially the entire axial direction, compared to a trumpet-shaped portion, the distance from the exposed position to the protected position is greater. When the protective member 10 is moved by pressing, the cylindrical portion 11 is less likely to be caught by the peripheral surface seal member 19 accommodated in the groove 25 . Thereby, the protection member 10 can be smoothly moved toward the protection position.
The recessed groove 25 is provided so as to open toward the axial center side on the bottom surface facing the axial center side of the recessed stepped portion 24 forming the inner peripheral surface of the axial second end side portion of the inner cylinder member 20 . ing. In the illustrated example, the recessed groove 25 has a substantially rectangular groove shape when viewed in the circumferential direction.

As shown in FIG. 5B, the concave groove 25 is configured such that the opening on the axial side is covered over the entire circumference by the cylindrical portion 11 of the protective member 10 at the protective position. In other words, when the protective member 10 is in the protective position, the tubular portion 11 is positioned on the inner peripheral side of the peripheral seal member 19 over the entire circumference, and the peripheral seal member 19 is covered with the tubular portion 11 . Become.
The peripheral surface seal member 19 accommodated in the groove 25 has an annular shape, and as shown in FIG. 6B, when the protection member 10 is in the exposed position, it is elastically restored from the opening of the groove 25 to the axial center. It protrudes toward the side and closely contacts the outer peripheral surface 8 a of the connected pipe 8 . The peripheral surface seal member 19 is shaped so as to be in close contact with the outer peripheral surface 8a of the connected pipe 8 to ensure sealing performance, and also to fit the cylindrical portion 11 of the protective member 10 moving toward the protective position. It may have an appropriate shape so that it is difficult to get caught. The figure shows an example in which the peripheral surface seal member 19 is formed in a substantially U-shape opening toward the first end side in the axial direction when viewed in the circumferential direction. Further, the peripheral surface seal member 19 may be made of an appropriate material according to the type of fluid to be passed through the connected pipe 8 or the like. The peripheral seal member 19 may be made of a soft synthetic resin material, rubber, various elastomer materials, or the like.

Further, as shown in FIGS. 6(b) and 8(b), the joint 1 has an inner cylinder between a removal suppression position that suppresses removal of the connected pipe 8 that has been inserted, and a removal possible position that enables removal. A retaining member 5 is movably held with respect to the member 20 . In addition, the inner cylindrical member 20 is positioned between a lock position for suppressing movement of the retaining member 5 to the detachable position and an unlocking position for permitting movement of the retaining member 5 to the detachable position. It is relatively movable with respect to the member 30 . Further, the inner cylindrical member 20 is configured to be held by the outer cylindrical member 30 at each of the locked position and the unlocked position. With such a configuration, it is possible to prevent the connected tube 8 from being pulled out by the pull-out prevention member 5 at the pull-out prevention position. In addition, since the connected pipe 8 can be pulled out while the inner cylinder member 20 is positioned at the unlocked position relative to the outer cylinder member 30 and held by the outer cylinder member 30, the operation member can be pushed. Workability can be improved as compared with the case where it is necessary to extract while doing so. Further, when the operating member is biased by a spring or the like, it is difficult to uniformly push the operating member in the circumferential direction. According to this embodiment, there is no such concern.

Further, in the present embodiment, as shown in FIGS. 2 and 3, the retainer member 5 is divided into a plurality of pieces (three pieces in the example shown) in the circumferential direction, and is attached to the inner cylindrical member 20 so as to be freely movable in the radial direction. The configuration is maintained. With such a configuration, it is provided over the entire circumference in the circumferential direction, and is removed compared to the case where it is necessary to bend the end on the shaft center side to release it by pushing it with the operation member. The retaining member 5 can be smoothly moved toward the possible position. Since these three retaining members 5 have the same configuration, one of them will be described below as an example.
As shown in FIG. 5(b), the retaining member 5 has a distal end portion disposed so as to protrude from the inner peripheral surface of the inner cylinder member 20 in the axial direction midway in the withdrawal restraining position toward the axial center side. 6. The distal end portion 6 abuts the outer peripheral surface 8a of the connected pipe 8 so as to bite into it, and movement of the connected pipe 8 in the extraction direction is suppressed. Further, the retainer member 5 is in the form of a thin plate whose thickness direction is generally along the axial direction. Further, in the example shown in the figure, an example in which notch-shaped recesses are provided alternately in the circumferential direction on the axial center side and the radial outer side so as to open respectively on the axial center side and the radial outer side of the retaining member 5 is shown. showing. The dimension along the circumferential direction of the distal end portion 6 of the retaining member 5 that abuts against the outer peripheral surface 8a of the connected pipe 8 may be an appropriate dimension from the viewpoint of preventing the connected pipe 8 from coming off. The dimensions may be such that they are in contact with the outer peripheral surface 8a over half or more in the circumferential direction.

Further, in this embodiment, the inner cylindrical member 20 is provided with a slit-shaped accommodation recess 23 extending in the circumferential direction, in which the retainer member 5 is accommodated and held, so as to penetrate in the radial direction. . With such a configuration, it is possible to accommodate and hold the retainer member 5 that is generally movable in the radial direction in the accommodation recess 23 . As a result, the retaining member 5 can be easily assembled compared to a configuration in which the retaining member 5 is held in a recess that opens on the inner peripheral side. In the present embodiment, a plurality (three in the figure) of accommodation recesses 23 are provided at intervals in the circumferential direction of the inner cylinder member 20 corresponding to the number of the retainer members 5 . These accommodation recesses 23 are configured in the same manner as each other.
The accommodation recess 23 is configured to accommodate the retaining member 5 so that the distal end portion 6 of the retaining member 5 is exposed on the inner peripheral surface. In this embodiment, the accommodation recess 23 is provided in an inclined shape that is inclined toward the second end side in the axial direction as it goes toward the axial center side. That is, the retainer member 5 housed in the housing recess 23 is provided so as to incline toward the axial second end side as it goes toward the axial center side. With such a configuration, it is possible to suppress the movement of the connected pipe 8 in the removal direction, and at the same time, it is possible to improve the insertability when inserting the connected pipe 8 .

That is, in this embodiment, the retainer member 5 is held by the inner cylindrical member 20 so as to be movable not in the radial direction orthogonal to the axial direction but in the direction inclined with respect to the radial direction. In this way, even when the movement direction is inclined with respect to the radial direction, it is generally included in the radial direction. In other words, the retaining member 5 moving between the detachment restraining position and the detachable position may expand and contract in the radial direction.
Further, the accommodation recess 23 is provided so as to allow elastic deformation of the distal end portion of the retainer member 5 toward the second end in the axial direction when the connected pipe 8 is inserted. Further, the accommodation recess 23 is configured to allow movement of the retainer member 5 radially outward.
In addition, the retaining member 5 is held by the inner cylindrical member 20 so as to suppress the movement of the retaining member 5 toward the axial center side with the tip portion 6 protruding slightly from the inner peripheral surface of the inner cylindrical member 20. A holding portion 23a is provided. Further, the retention member 5 is provided with a held portion 7 held by the holding portion 23 a of the inner cylindrical member 20 .

In the present embodiment, portions provided so as to protrude in the circumferential direction at radially outer portions on both sides in the circumferential direction of the retaining member 5 are defined as held portions 7 and 7 . Further, a portion having a notch-shaped recess on the axial side of the circumferentially central portion of the retainer member 5 serves as a held portion 7 . In other words, in this embodiment, the retainer member 5 is provided with a plurality of (three in the figure) held portions 7, 7, 7 spaced apart in the circumferential direction.
Inner edges on both sides in the circumferential direction of the housing recess 23 are provided with retaining portions 23a, 23a in the form of projecting steps for retaining the retained portions 7, 7 on both sides in the circumferential direction of the retaining member 5 (FIG. 4A). reference). In addition, at the circumferentially central portion of the accommodation recess 23, there is provided a holding portion 23a in the form of a retaining wall that retains the held portion 7 at the circumferentially central portion of the retaining member 5 (FIGS. 1B and 1B). 5(b), etc.). Note that the retained portion 7 of the retaining member 5 and the retaining portion 23a of the inner cylinder member 20 are not limited to those configured as described above, and various other modifications are possible.

Further, in the present embodiment, the inner cylinder member 20 is provided with a protrusion 22 that serves as a finger hook when the inner cylinder member 20 is rotated relative to the outer cylinder member 30 . The protrusion 22 is provided to protrude radially outward from the outer peripheral side of the axial first end of the inner cylinder member 20 . Further, the protrusion 22 protrudes radially outward from the outer peripheral surface of the outer cylindrical member 30 so that it can be hooked with a finger. In addition, the inner cylindrical member 20 is provided with a plurality of (three in the figure) protrusions 22 spaced apart in the circumferential direction. In addition, instead of such a mode, a configuration in which only one protrusion 22 is provided may be employed.
Further, in this embodiment, the joint 1 is provided with an inter-cylinder seal member 18 for sealing between the inner cylinder member 20 and the outer cylinder member 30 . In the present embodiment, a concave groove 26 for accommodating the inter-cylinder seal member 18 is provided on the second axial end of the inner cylinder member 20 over the entire circumference.

The concave groove 26 is provided so as to open toward the axial second end side on the axial second end surface in the vicinity of the base end portion of the projecting piece portion 27 of the inner cylindrical member 20 . The illustrated example shows an example in which the groove 26 has a substantially rectangular groove shape when viewed in the circumferential direction.
The inter-cylinder seal member 18 accommodated in the recessed groove 26 is annular, and as shown in FIG. It is configured to be in close contact with the wall surface 36 . The shape of the inter-cylinder sealing member 18 may be an appropriate shape so as to ensure sealing performance, as in the case described above. In the illustrated example, the cylinder-to-cylinder seal member 18 has an O-ring shape that is substantially circular when viewed in the circumferential direction. Further, the inter-cylinder seal member 18 is made of an appropriate material such as a soft synthetic resin material, rubber, various elastomer materials, etc., in accordance with the type of fluid to be passed through the connected pipe 8, as described above. Anything is fine.
The inside of the connected pipe 8 and the inside of the joint 1 are sealed from the outside of the joint 1 by the inter-cylinder sealing member 18 and the peripheral surface sealing member 19 .

In this embodiment, the outer cylinder member 30 moves the inner cylinder member 20 relative to the outer cylinder member 30 between the locked position on the second axial end side and the unlocked position on the first axial end side. It is configured to be held freely. Further, in this embodiment, the outer cylinder member 30 has a first position for suppressing the movement of the protection member 10 to the exposure position (connection completion position) side, which is the protection position (initial position), and an exposure position for the protection member 10 . It is rotatable relative to the inner cylindrical member 20 to a second position that allows movement to the position side.
Further, in this embodiment, as shown in FIGS. 7(a) and 8(a), the locked position and the unlocked position of the inner cylindrical member 20 with respect to the outer cylindrical member 30 are displayed on the outer peripheral side of the joint 1. A display unit 29 is provided. With such a configuration, the operator can recognize whether the inner cylindrical member 20 is at the locked position or the unlocked position. As a result, it is possible to prevent unintended disconnection of the connected pipe 8 and prevent the connected pipe 8 from being forcibly pulled out.

In this embodiment, the display section 29 is configured to function also as a display section that displays the first position and the second position of the inner cylinder member 20 with respect to the outer cylinder member 30 . With such a configuration, when the outer cylinder member 30 is rotated relative to the inner cylinder member 20 to bring the protection member 10 into the protection position, the protection member 10 becomes the protection position. The operator can be made to recognize by the display unit 29 that the has reached the first position. Further, after the first position is set in this way, when the outer cylinder member 30 is rotated relative to the inner cylinder member 20 to allow the protection member 10 to move to the exposed position side, the protection member 10 is exposed. A worker can be made to recognize by the display part 29 that the outer cylinder member 30 which becomes movable to the position side has become the 2nd position. In this embodiment, the display portion 29 is provided on the inner cylindrical member 20 . A specific configuration of the display unit 29 will be described later.

As shown in FIGS. 2, 3, and 5B, the outer cylinder member 30 has a substantially cylindrical shape that extends through the inner cylinder member 20 in the axial direction so as to be concentric with the inner cylinder member 20. there is The outer cylinder member 30 includes an inner cylinder receiving portion 37 at a first axial end portion provided with a receiving port 31 for receiving the inner cylinder member 20 , and a second end constituting a second axial end portion of the joint 1 . It has a tubular portion 30 a and an intermediate tubular portion 35 provided between the second end tubular portion 30 a and the inner tubular receiving portion 37 . The stepped wall surface 36 to which the cylinder-to-cylinder seal member 18 comes into close contact constitutes a stepped portion on the inner peripheral side between the intermediate cylindrical portion 35 and the inner cylinder receiving portion 37 .
The second end tubular portion 30 a has an outer diameter and an inner diameter smaller than those of the intermediate tubular portion 35 . As shown in FIG. 6B, the inner diameter of the second end tubular portion 30a is substantially the same as the inner diameter of the connected pipe 8 in this embodiment. The above-described exposure position (connection completion position) and The surface of the pressed portion 15 of the protected member 10 facing toward the second end in the axial direction comes into contact or closely faces. When the connected pipe 8 is inserted, the inner peripheral surfaces of the second end cylindrical portion 30a, the pressed portion 15, and the connected pipe 8, which have substantially the same inner diameters, are connected to form substantially the same curved surface. are distributed as follows. With such a configuration, the pressure loss at the joint 1 portion of the fluid flowing through the connected pipe 8 can be reduced.

Further, in the present embodiment, as shown in FIGS. 7B and 8B, the outer cylinder member 30 is rotated in one direction relative to the inner cylinder member 20. In this configuration, an inclined guide surface 34 is provided that contacts the contacted portion (the inclined guided surface 17) of the protective member 10 when the protective member 10 is moved. The inclined guide surface 34 abuts on the abutted portion (the inclined guided surface 17) of the protective member 10 when the outer cylinder member 30 is rotated in one direction relative to the inner cylinder member 20. The protection member 10 is moved from the connection completion position toward the initial position. With such a configuration, the protective member 10 can be smoothly moved toward the initial position by the guiding action of the inclined guide surface 34 .

Further, in this embodiment, the abutted portion of the protective member 10 is an inclined guided surface 17 provided in parallel with the inclined guide surface 34 of the outer cylindrical member 30 . With such a configuration, the protective member 10 can be moved more smoothly toward the initial position by the mutual guiding action of the inclined guide surface 34 and the inclined guided surface 17 . Here, the inclined guide surface 34 and the inclined guided surface 17 do not need to be completely parallel. It should be possible to move toward For example, the inclination angles may differ from each other by about 20 degrees.
In addition, in this embodiment, the inclined guide surface 34 of the outer cylinder member 30 and the inclined guided surface 17 of the protective member 10 are provided at a plurality of locations (three locations in the figure) spaced apart in the circumferential direction. and With such a configuration, the protective member 10 can be moved more smoothly toward the initial position by the mutual guiding action of the inclined guide surfaces 34 and the inclined guided surfaces 17 provided at a plurality of locations in the circumferential direction. can. Since the plurality of inclined guide surfaces 34 and inclined guided surfaces 17 have the same configuration, one of them will be described below as an example.

As shown in FIGS. 2, 3 and 8(b), the inclined guided surface 17 of the protective member 10 extends from the surface facing the second axial end of the pressed portion 15 of the protective member 10 to the axial second end. It is the projecting direction tip surface of the guided projecting piece portion 16 provided so as to project toward the two end side. The projected piece portion 16 to be guided is configured such that the thickness direction is along the radial direction. In addition, the projected piece portion 16 to be guided may be formed in a substantially circular arc shape that is substantially concentric with the protective member 10 when viewed in the axial direction.
The inclined guided surface 17 is provided so as to incline toward the axial first end side from the circumferential one side edge of the guided projecting piece portion 16 toward the circumferential other side edge.

The inclined guide surface 34 of the outer cylindrical member 30 is the bottom surface facing the first end in the axial direction of the guide recess 33 that opens in the stepped wall surface 32 so as to receive the guided projecting piece portion 16 of the protective member 10 .
As shown in FIGS. 7(b) and 8(b), the guide recess 33 has an outer diameter larger than that of the axially second end portion of the second cylindrical end portion 30a and a thickness thereof. It is provided at the enlarged axial first end portion. Moreover, as shown in FIG. 4(b), the guide recess 33 is provided so as to extend in the circumferential direction. The illustrated example shows an example in which the guide recess 33 has a substantially quarter arc shape when viewed in the axial direction.
The inclined guide surface 34 forming the bottom surface of the guide recess 33 is provided so as to incline from the deepest portion 34a on one side in the circumferential direction toward the other side in the circumferential direction toward the first end in the axial direction. The other side edge is a boundary edge 34 b with the step wall surface 32 . That is, the guide recess 33 is formed so that the depth dimension along the axial direction decreases from the deepest portion 34a on one side in the circumferential direction toward the boundary edge portion 34b on the other side in the circumferential direction. The axial dimension from the deepest portion 34a of the guide recess 33 to the boundary edge 34b corresponds to the axial movement dimension of the protective member 10 moved from the exposed position to the protected position. . Instead of providing the inclined guide surface 34 of the outer cylindrical member 30 and the inclined guided surface 17 of the protective member 10 at a plurality of locations, only one of each of these may be provided. Further, the portion to be abutted against the inclined guide surface 34 of the outer cylindrical member 30 is not limited to the inclined guided surface 17, and may be a surface having a convex curved surface shape, and other various modifications are possible. is.

The intermediate tubular portion 35 is provided so as to receive the protrusion portion 27 of the inner tubular member 20 described above. The inner diameter of the intermediate cylindrical portion 35 is set to an appropriate diameter so as to form a space that allows elastic deformation of the projecting piece portion 27 radially outward.
The inner cylinder receiving portion 37 has an inner diameter corresponding to the outer diameter of the inner cylinder member 20 so that the inner cylinder member 20 can be received. The inner diameter of the inner cylinder receiving portion 37 may be slightly larger than the outer diameter of the inner cylinder member 20 .
In addition, in the present embodiment, the radially outer end portion of the retainer member 5 abuts against the inner peripheral side of the outer cylinder member 30 to prevent movement to the detachable position. A recessed stepped portion 38 that forms a space that allows movement to the radially outer side, which is the possible side, is axially adjacent to the recessed stepped portion 38 . Further, the contact portion and the recessed stepped portion 38 are provided on the inner peripheral side of the inner cylinder receiving portion 37 .
The recessed stepped portion 38 is provided in a stepped shape on the inner peripheral side of the axially first end portion of the inner cylinder receiving portion 37 so that the inner diameter is larger than that of the axially second end portion. The depth dimension (step dimension) along the radial direction of the recessed stepped portion 38 is set appropriately so that the tip portion 6 of the retaining member 5 does not substantially protrude from the inner peripheral surface of the inner cylindrical member 20 at the removable position. It may be dimensioned. In addition, the inner peripheral surface of the inner cylinder receiving portion 37 adjacent to the axially second end side of the recessed step portion 38 constitutes a contact portion.

Further, the outer cylinder member 30 is provided with a guide opening 39 that constitutes a holding part that holds the display part 29 as a held part of the inner cylinder member 20 at each of the locked position and the unlocked position. In this embodiment, the guide opening 39 is provided in the inner tube receiving portion 37 . The guide opening 39 is configured to guide and expose the display portion 29 of the inner cylinder member 20 that is moved relative to the outer cylinder member 30 . Further, the guide opening 39 is provided with a locked position holding portion 39a for holding the display portion 29 at the locked position and a guide portion 39b as an unlocked position holding portion for holding the display portion 29 at the unlocked position. ing. The lock position holding portion 39a and the guide portion 39b are provided so as to be offset in the axial direction and connected to each other in the circumferential direction.
The display portion 29 of the inner cylinder member 20 is formed in the shape of a projection that protrudes radially outward from the outer peripheral surface of the inner cylinder member 20 . In the illustrated example, the display portion 29 has a substantially columnar shape when viewed in the projecting direction (radial direction).

The guide opening 39 of the inner cylinder receiving portion 37 has a slit shape extending in the circumferential direction through the inner cylinder receiving portion 37 in the radial direction (thickness direction).
5(a) and 7(a), the lock position holding portion 39a is provided at one circumferential end portion of the guide opening 39, and the first axial end portion of the display portion 29 with respect to the inner cylinder receiving portion 37. Prevent sideways movement. The lock position holding portion 39a is formed so as to be bent toward the second end in the axial direction so as to be located closer to the second end in the axial direction than the other side portion of the guide opening 39 in the circumferential direction. Further, the lock position holding portion 39a is provided with a restricting portion 39c that restricts movement of the display portion 29 relative to the guide opening 39 toward the first end in the axial direction and the other side in the circumferential direction.

When the display portion 29 is positioned at the lock position holding portion 39a, as shown in FIG. A state in which movement to the outside in the radial direction is suppressed by being restricted by the surface is created. At this locked position, the display portion 29 is regulated by the locked position holding portion 39a and the regulating portion 39c, and the inner cylindrical member 20 is held axially immovable with respect to the outer cylindrical member 30 at the locked position. Become.
Further, the state in which the display portion 29 is positioned at the lock position holding portion 39a in this way is defined as the second position where the protection member 10 is allowed to move toward the exposed position side. In this state, the inclined guided surface 17 of the guided projecting piece portion 16 of the protective member 10 faces the deepest portion 34a of the inclined guide surface 34 of the outer cylinder member 30, and the protective member 10 at the protected position is exposed. It becomes possible to move to the side.

Further, the display portion 29 is moved toward the other side in the circumferential direction relative to the inner cylinder receiving portion 37 so as to release the restriction by the restricting portion 39c provided in the lock position holding portion 39a, and is positioned at the bent portion. By doing so, the display portion 29 can move toward the first end in the axial direction relative to the inner cylinder receiving portion 37 . In this state, if the display portion 29, that is, the inner cylinder member 20 is moved relative to the inner cylinder receiving portion 37 toward the axial direction first end side, as shown in FIG. The concave stepped portion 38 of the inner cylinder receiving portion 37 is positioned radially outward of the retainer member 5 , so that the retainer member 5 can be moved radially outward. In other words, it is in the unlocked position, and in this state, the connected pipe 8 can be pulled out from the joint 1 as the retaining member 5 moves radially outward.
At this unlocked position, the display portion 29 is regulated by a guide portion 39b provided so as to extend in the circumferential direction on the other circumferential side of the guide opening 39, and the inner cylinder member 20 is moved relative to the outer cylinder member 30. At the unlocked position, it is held so as not to move in the axial direction.

Further, the display portion 29 moves relatively along the guide portion 39b, and as shown in FIG. The first position is set to restrain the movement of the member 10 toward the exposed position. In this state, as shown in FIG. 8B, the inclined guided surface 17 of the guided projecting piece portion 16 of the protective member 10 faces the boundary edge portion 34b of the inclined guide surface 34 of the outer cylindrical member 30. As a result, the protection member 10 is in the protection position while being unable to move toward the exposure position. In addition, at the other end in the circumferential direction of the guide opening 39, there is provided a concave portion that enables reception of the display portion 29 when the inner cylinder member 20 is assembled to the outer cylinder member 30 (see FIG. 2). . It should be noted that the circumferential dimension of the guide opening 39 corresponds to the rotation of the outer cylinder member 30 that rotates relative to the inner cylinder member 20 when the protective member 10 is moved from the exposed position toward the protected position. An appropriate dimension may be set according to the angle (about 90 degrees in the example shown).
Further, in this embodiment, the guide opening 39 and the display portion 29 are provided at a plurality of locations (three locations in the example shown) at intervals in the circumferential direction. In addition, instead of such a mode, a configuration in which only one guide opening 39 and one display portion 29 are provided may be employed. The retaining member 5, the protective member 10, the inner cylindrical member 20, and the outer cylindrical member 30, which constitute the joint 1, may be made of a hard synthetic resin material, metal material, or the like.

In the joint 1 configured as described above, as shown in FIG. In addition, in the protected position, the connected pipe 8 is inserted through the insertion port 21 . As shown in FIG. 6A, the end face of the end portion 9 of the connected pipe 8 is pressed against the pressed portion 15 of the protective member 10, and the protective member 10 is axially moved with respect to the inner cylindrical member 20. Then, the engaging portion 13 of the protective member 10 contacts the engaged portion 28 of the inner cylindrical member 20 as described above. Then, as shown in FIG. 6(b), when the connected pipe 8 is further pushed in, the engaging portion 13 of the protective member 10 climbs over the engaged portion 28 of the inner cylindrical member 20, and a click feeling is imparted to the protective member. The member 10 is at the exposed position, the peripheral surface seal member 19 is exposed, and is brought into close contact with the outer peripheral surface 8a of the connected pipe 8 . In this state, the inclined guided surface 17 of the guided projecting piece portion 16 of the protective member 10 is in contact with or closely faces the deepest portion 34 a of the inclined guide surface 34 of the outer cylindrical member 30 . Further, in this state, removal of the connected pipe 8 is suppressed by the removal prevention member 5 in the removal prevention position.

When extracting the connected pipe 8 connected to the joint 1 as described above, as shown in FIG. The inner cylinder member 20 is moved relative to the outer cylinder member 30 so as to move around and move to the axial direction first end side. That is, it is set to the unlocked position. As a result, as described above, the retaining member 5 can be moved radially outward, and the connected pipe 8 can be pulled out. In this state, the protective member 10 is in the exposed position (see FIG. 7(b)), so when connecting the connected pipe 8 after the connected pipe 8 is pulled out, the protective member 10 is placed in the protective position. is desired. That is, as shown in FIGS. 7(b) and 8(b), the inner cylinder member 20 (protection member 10) is rotated relative to the outer cylinder member 30 around the axis toward the first position side. . As a result, the guide action of the inclined guide surface 34 of the outer cylindrical member 30 causes the inclined guided surface 17 of the guided projecting piece portion 16 of the protective member 10 to move toward the first end in the axial direction, and the protective member 10 is protected. position, and the outer cylindrical member 30 is at the first position. In this state, the movement of the protective member 10 to the exposed position side is restrained by the boundary edge portion 34b of the inclined guide surface 34 of the outer cylinder member 30. As shown in FIG. Therefore, contrary to the above, the inner cylinder member 20 (protection member 10) is rotated relative to the outer cylinder member 30 toward the lock position side and moved to the second end side in the axial direction. to position the display portion 29 on the lock position holding portion 39a. As a result, the protective member 10 from the protective position can be moved toward the exposed position, and the retainer member 5 cannot be moved radially outward.

Next, another embodiment will be described with reference to the drawings.
9 to 12 are diagrams schematically showing an example of the joint according to the second embodiment.
In the following embodiment, differences from the first embodiment will be mainly described, and similar configurations will be given the same reference numerals, and their description will be omitted or simplified. In addition, descriptions of operations, functions, and the like that are the same as those of the first embodiment will be omitted or briefly described.

As shown in FIGS. 10 and 11, a joint 1A according to this embodiment differs from the first embodiment in that an inner cylinder member 20A and an outer cylinder member 30A that constitute a joint body 2A are divided in the axial direction. are mainly different.
As shown in FIGS. 10 to 12, the inner cylindrical member 20A is divided into a first axial portion 20Aa and a second axial portion 20Ac which are axially divided so as to partition both sides of the housing recess 23A in the axial direction. I have. With such a configuration, the shape of the retainer member 5A can be simplified compared to, for example, the first embodiment in which the accommodation recess 23 is provided by integral molding or cutting. , making it easier to manufacture. In addition, it becomes easier to form a holding portion for holding the retaining member 5A, and compared to the structure provided with the retained portion 7 as described above, it is possible to alleviate the concentration of stress locally on the retaining member 5A. can. Moreover, the circumferential dimension of the distal end portion 6A that abuts against the outer peripheral surface 8a of the connected pipe 8 can be effectively increased, and the holding force of the connected pipe 8 can be improved. Further, as will be described later, even when the retainer member 5A is provided with a bent portion in the middle in the radial direction, it can be easily arranged in the accommodation recess 23A.
The first axial portion 20Aa and the second axial portion 20Ac are configured to be joined by a fixing tool 3 as a joining tool. In the illustrated example, the first axial portion 20Aa is provided with an insertion hole 20Ab for the fastener 3, and the second axial portion 20Ac is provided with a fastening portion 20Ad provided with a female threaded hole into which the fastener 3 is screwed. is shown. Also, an example in which these insertion holes 20Ab and fastening portions 20Ad are provided at a plurality of locations (two locations in the example shown) at intervals in the circumferential direction is shown.

A protrusion 22 is provided in the first axial portion 20Aa on the first axial end side in the same manner as described above. Further, the inner diameter of the first axial portion 20Aa is set to correspond to the outer diameter of the connected pipe 8 as described above.
In the second axial portion 20Ac on the second axial end side, in substantially the same manner as described above, a concave groove 25 for receiving the peripheral surface seal member 19, a concave groove 26 for receiving the inter-cylinder seal member 18, a projecting piece portion 27, and a display portion. 29 are provided. In this embodiment, the second axial portion 20Ac is provided with two projecting pieces 27 spaced apart in the circumferential direction. Moreover, corresponding to these two projecting pieces 27, 27, the protective member 10A has a configuration in which the recessed portion 12 and the engaging portion 13 are provided at two locations spaced apart in the circumferential direction. Further, in substantially the same manner as described above, the configuration is such that the rotation restraint portions 14A, 14A are provided so as to be positioned on both sides of the recess 12 in the circumferential direction. In the illustrated example, the rotation restraining portions 14A, 14A are not shaped to extend in the axial direction, but are shaped like projections projecting in the radial direction.

Further, the inner diameter of the second axial portion 20Ac is made larger than the inner diameter of the first axial portion 20Aa so that the recessed stepped portion 24A substantially similar to the above is formed. The drawing shows an example in which the step size of the recessed step portion 24A and the thickness size of the cylindrical portion 11A of the protective member 10A are larger than those of the first embodiment.
When the first axial portion 20Aa and the second axial portion 20Ac are joined, an accommodation recess 23A for accommodating and holding the retaining member 5A is defined between them. In this embodiment, it is set as the structure which provided 5 A of retaining members divided into two in the circumferential direction.
The retaining member 5A is provided with a notch-shaped recess so as to divide the portion on the side of the tip portion 6A in the circumferential direction. The figure shows an example in which a plurality of (five in the figure) cut-like recesses are provided at equal intervals in the circumferential direction of the retaining member 5A. Further, in the present embodiment, the radially outer portion of the retainer member 5A is not provided with a notch-shaped recess, and the radially outer portion is inclined toward the axial second end side. It is bent with respect to the portion 6A side portion and is provided so as to extend in the radial direction.

Further, the retained portion 7A of the retainer member 5A is a radially outer portion that constitutes the bottom portion of the notch-shaped recess. In other words, also in this embodiment, a plurality of held portions 7A are provided in the retainer member 5A at intervals in the circumferential direction.
As shown in FIG. 11, the holding portion 23Aa of the inner cylindrical member 20A is shaped like a protrusion that protrudes from the axial first end portion of the axial second portion 20Ac toward the axial first end side. The holding portion 23Aa is inserted into the notch-shaped recess of the retainer member 5A to restrain the radially inward movement of the held portion 7A. Moreover, it is set as the structure which provided the several holding|maintenance part 23Aa with the space|interval in the circumferential direction at the axial direction 2nd site|part 20Ac. Although the figure shows an example in which the holding portions 23Aa are provided in the same number as the notch-shaped recesses of the retaining member 5A, the number of the holding portions 23Aa may be smaller than the number of the notch-shaped recesses.

Note that the retainer member 5A may not be divided in the circumferential direction by the notch-shaped recess as described above, instead of being divided in the circumferential direction. In this case, a configuration may be adopted in which a through hole having a long diameter in the radial direction through which the projecting holding portion 23Aa is inserted is provided in the retainer member 5A.
Further, the retained portion 7A of the retaining member 5A and the retaining portion 23Aa that retains it are not limited to the above-described modes. For example, as in the present embodiment, when the radially outer portion is bent with respect to the distal end portion 6A side portion, the bent portion is used as the held portion, and an appropriate method for holding the bent portion in the inner cylindrical member 20A is used. A configuration in which a holding portion is provided may be employed. In this case, the configuration may be such that the projecting holding portion 23Aa is not provided. Various other modifications are possible for the retainer member 5A and the inner cylindrical member 20A that holds the retainer member 5A.

As shown in FIG. 9, the outer cylindrical member 30A is divided into a first axial portion 37Aa and a second axial portion 37Ac which are divided in the axial direction so as to define both axial sides of a guide opening 39A similar to the above. It has That is, the outer cylinder member 30A is configured by dividing the inner cylinder receiving portion 37A in the axial direction. With such a configuration, the display portion 29 can be displayed without providing a concave portion for receiving the display portion 29 on the inner peripheral surface of the first axial end portion of the outer cylinder member 30 as in the first embodiment. can be positioned within the guide opening 39A.
Further, the first axial portion 37Aa and the second axial portion 37Ac are configured to be joined by a fixing tool 4 as a joining tool. In the illustrated example, a protrusion 37Ab having an insertion hole for the fastener 4 is provided on the outer peripheral portion of the axial first portion 37Aa, and a female screw to which the fastener 4 is screwed on the outer peripheral portion of the axial second portion 37Ac. The example which provided fastening part 37Ad with which the hole was provided is shown. Moreover, the example which vacated the space|interval in the circumferential direction, and provided these projection part 37Ab and fastening part 37Ad in multiple places (three places in the example of a figure) is shown.

As shown in FIGS. 10 and 11, a concave portion that defines the lock position holding portion 39Aa of the guide opening 39A is provided at the axial first end portion of the axial first portion 37Aa on the axial second end side. there is
A concave portion that defines the guide portion 39Ab of the guide opening 39A is provided at the axial second end portion of the axial second portion 37Ac on the axial first end side. A restricting portion 39Ac similar to that described above is provided at one circumferential end of the concave portion forming the guide portion 39Ab.
Even in the joint 1A configured as described above, as shown in FIG. For example, the protection member 10A is at the exposed position in the same manner as described above. In other words, the peripheral surface seal member 19 is exposed and is brought into close contact with the outer peripheral surface 8a of the connected pipe 8, and the removal of the connected pipe 8 is suppressed by the removal prevention member 5A set at the removal prevention position.
When extracting the connected pipe 8 connected to the joint 1A as described above, as shown in FIG. to the unlocked position. As a result, the retaining member 5A can be moved radially outward, and the connected pipe 8 can be pulled out.

It should be noted that the mutually different configurations described in each of the above embodiments may be suitably modified, rearranged and applied, or combined and applied as necessary.
Further, in each of the above-described embodiments, an example in which the display portion 29 for displaying the locked position (second position) and the unlocked position (first position) is provided on the outer peripheral side of the joints 1 and 1A is shown. Such a display part 29 and guide openings 39, 39A for exposing it may not be provided. In this case, appropriate holding portions that hold the inner cylinder members 20 and 20A with respect to the outer cylinder members 30 and 30A at the locked position (second position) and the unlocked position (first position),
A configuration in which a restriction guide or the like for restricting movement in the axial direction is provided may be employed.
In each of the above-described embodiments, the engaging portion 13 and the engaged portion 28, which constitute a click mechanism that gives a click feeling when the protective members 10 and 10A and the inner cylindrical members 20 and 20A are in the exposed position, are provided. Although an example in which such a click mechanism is provided is shown, a configuration in which such a click mechanism is not provided is also possible. In this case, a display window capable of notifying that the protective members 10 and 10A have reached the exposed position (connection completion position) may be provided as a notifying portion, or a sound may be generated to notify. Furthermore, the configuration may be such that the protection member 10, 10A does not have a notification function for notifying that the protective member 10, 10A has reached the exposed position (connection completion position).

In each of the above embodiments, the protection members 10 and 10A are moved from the exposed position to the protected position as the outer cylinder members 30 and 30A are rotated in one direction relative to the inner cylinder members 20 and 20A. Although a configuration example is shown, it is not limited to such an aspect. A configuration provided with an appropriate operating portion capable of moving the protection members 10 and 10A toward the protection position from the outer peripheral side of the joints 1 and 1A, and inner cylindrical members 20 and 20A for setting the protection members 10 and 10A to the protection position. It may be configured such that it needs to be detached from and re-assembled.
Further, in each of the above-described embodiments, an example in which the inner cylindrical members 20 and 20A are provided with the groove 25 for receiving the peripheral surface seal member 19 is shown. A stepped wall or the like may be provided to prevent the circumferential seal member 19 from moving toward the second end in the axial direction. Further, in each of the above-described embodiments, an example is shown in which the inner cylindrical members 20 and 20A are provided with the recessed stepped portions 24 for receiving the cylindrical portions 11 and 11A of the protective members 10 and 10A. 24 may be omitted.

In each of the above-described embodiments, the protection members 10 and 10A are configured to be movable from the exposed position to the protected position with respect to the inner cylinder members 20 and 20A. Anything is fine. In other words, the protection member 10, 10A may be made immovable toward the protection position after being moved toward the exposure position. Furthermore, the configuration may be such that the protective members 10 and 10A for protecting the peripheral surface seal member 19 are not provided.
Further, in each of the above-described embodiments, the example in which the housing recesses 23, 23A penetrating the inner cylinder members 20, 20A in the radial direction are provided, but the housing recesses opening only on the inner peripheral side may also be provided. good.
Further, in each of the above-described embodiments, an example in which a plurality of retaining members 5 and 5A are provided in the circumferential direction is shown, but a single retaining member 5 and 5A may be provided. In this case, the retainer members 5 and 5A may be closed loops or open loops.

Further, in each of the above-described embodiments, an example is shown in which the retaining members 5 and 5A are moved substantially in the radial direction to the extractable position, but the present invention is not limited to such an aspect. For example, a configuration may be adopted in which the distal end portions of the retaining members 5 and 5A are axially moved to the removable position. In this case, a suitable operation piece or the like may be provided on the inner peripheral side of the inner cylindrical members 20, 20A for axially moving the distal end portions of the retainer members 5, 5A.
Further, in this embodiment, an example is shown in which the inner cylinder members 20 and 20A are moved in the circumferential direction and the axial direction relative to the outer cylinder members 30 and 30A to reach the locked position and the unlocked position. However, it is not limited to such a mode. For example, the locked position and the unlocked position may be set by moving the inner cylinder members 20 and 20A relative to the outer cylinder members 30 and 30A in one of the circumferential direction and the axial direction. In this case, the retained portions (display portions) 29 of the retaining members 5 and 5A and the inner cylinder members 20 and 20A, and the retaining portions (lock position retaining portions 39a and 39Aa and unlock position retaining portions) of the outer cylinder members 30 and 30A. The guide portions 39b, 39Ab) may be appropriately deformed. The configuration of each member and each part of the joints 1 and 1A according to the above embodiments is merely an example, and various modifications are possible.

1, 1A Joint 5, 5A Retaining member 20, 20A Inner cylindrical member (second cylindrical member)
20Aa first portion in the axial direction 20Ac second portion in the axial direction 21 insertion port 23, 23A accommodation recess 29 display portion 30, 30A outer cylindrical member (first cylindrical member)
31 reception port 8 connected pipe 9 end

Claims (4)

A first cylindrical member provided with a receiving port on the axial first end side, and the receiving port of the first cylindrical member is received, and the end of the connected pipe is inserted on the axial direction first end side. A second tubular member provided with an insertion port, a removal restraint position for suppressing removal of the connected pipe which is divided into a plurality of parts in the circumferential direction and inserted, and a removal possible position for enabling removal. a retaining member held movably in a generally radial direction with respect to the second cylindrical member,
The retaining member is disposed so as to protrude toward the axial center from the inner peripheral surface of the second tubular member in the axial direction midway at the removal restraint position, and bites into the outer peripheral surface of the connected pipe. A tip portion is provided that abuts so as to
The second cylindrical member has a lock position that prevents the removal prevention member from moving to the removal-enabled position, and an unlock position that allows the removal prevention member to move to the removal-enabled position. A joint characterized in that it is relatively movable with respect to said first cylindrical member, and is held by said first cylindrical member at each position. In claim 1 ,
A joint characterized in that the second tubular member has a slit-shaped accommodation recess extending in the circumferential direction, in which the retaining member is accommodated and held, and is provided so as to penetrate substantially in the radial direction. . In claim 2 ,
A joint, wherein the second cylindrical member is provided with a first axial portion and a second axial portion which are axially divided so as to partition both axial sides of the accommodation recess. In any one of claims 1 to 3 ,
A joint, wherein a display portion for displaying the locked position and the unlocked position of the second tubular member with respect to the first tubular member is provided on an outer peripheral side of the joint.

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