First joint and pipe joint

Abstract

A first joint has a central axis and extends in the axial direction along the central axis. The first joint has a first joint body, an axial facing section, an operation section, and an attachment section. The first joint body is connected with a second joint along the central axis. The axial facing section faces, from the front side of the first joint body in the axial direction, a protrusion protruding from the outer circumferential surface of the second joint while the first joint body is connected with the second joint. The operation section is connected with the axial facing section, operates along an axis-intersecting direction intersecting the central axis, and thereby switches the axial facing section and the protrusion between a facing state and a non-facing state in the axial direction. The attachment member is attached to the outer circumferential surface of the first joint body. The attachment member has an operation section-regulating section that regulates the movement of the operation section while the axial facing section and the protrusion are in the facing state.

Description

Technical Field

[0001] The present invention relates to a first joint and a pipe joint.

Background Art

[0002] In a conventional joint device, a user manually operates an operating member to quickly connect and disconnect a joint body from a part of fluid transport equipment. The operating member reciprocates with respect to the outer surface of the joint body by the action of a biasing member (for example, Patent Document 1).

[0003] Specifically, an insert assembly is inserted into the joint body. In this case, the insert assembly is locked to the joint body by the tapered surface of the insert assembly. Also, by pushing down the operating member, the lock is released, and the insert assembly can be detached and removed from the joint body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in a conventional joint device, for example, when the operating member contacts another member, the lock of the insert assembly may be released due to malfunction of the operating member.

[0006] The present disclosure has been made in view of the above problems, and an object thereof is to provide a first joint and a pipe joint capable of suppressing malfunction of the operating part.

Means for Solving the Problems

[0007] An exemplary first joint of this disclosure has a central axis and extends axially along the central axis. The first joint comprises a first joint body, an axial opposing portion, an operating portion, and a mounting portion. The first joint body connects to a second joint along the central axis. The axial opposing portion, when the first joint body is connected to the second joint, axially faces a projection protruding from the outer circumferential surface of the second joint, from the axial front end side of the first joint body. The operating portion is connected to the axial opposing portion and operates along an axial crossing direction intersecting the central axis, thereby switching between an axially opposed state and a non-opposed state between the axially opposed portion and the projection. The mounting member is mounted on the outer circumferential surface of the first joint body. The mounting member has an operating portion restricting portion that restricts the movement of the operating portion when the axially opposed portion and the projection are in opposition.

[0008] An exemplary first joint of this disclosure has a central axis and extends axially along the central axis. The first joint comprises a first joint body, an axial opposing portion, an operating portion, and a mounting portion. The first joint body connects to a second joint along the central axis. The axial opposing portion, when the first joint body is connected to the second joint, axially opposes a projection protruding from the outer circumferential surface of the second joint, from the axial front end side of the first joint body. The operating portion is connected to the axial opposing portion and operates along an axial crossing direction intersecting the central axis, thereby switching between an axially opposed state and a non-opposed state between the axially opposed portion and the projection. The mounting member is mounted on the outer circumferential surface of the first joint body. The mounting member has an intersecting direction opposing portion. The intersecting direction opposing portion, when the axially opposed portion and the projection are in opposition, faces the operating portion in an axially crossing direction between the first joint body and the operating portion.

[0009] An exemplary pipe fitting of this disclosure comprises the first fitting and the second fitting. [Effects of the Invention]

[0010] According to this exemplary disclosure, malfunctions of the operating parts can be suppressed. [Brief explanation of the drawing]

[0011] [Figure 1]Figure 1 is a perspective view showing a second joint according to the first embodiment of this disclosure. [Figure 2] Figure 2 is a cross-sectional view along the line II-II in Figure 1. [Figure 3] Figure 3 is a perspective view showing the first joint according to the first embodiment. [Figure 4] Figure 4 is an exploded perspective view showing the first joint according to the first embodiment. [Figure 5] Figure 5 is a cross-sectional view along the VV line in Figure 3. [Figure 6] Figure 6 is a cross-sectional view showing the state in which the operating member of the first joint according to the first embodiment is in the open position. [Figure 7] Figure 7 is a cross-sectional view showing the state in which the first joint and the second joint according to the first embodiment are connected. [Figure 8] Figure 8 is a plan view showing the first joint according to the first embodiment. [Figure 9] Figure 9 is a cross-sectional view along the line IX-IX in Figure 8. [Figure 10] Figure 10 is a plan view showing another state of the first joint according to the first embodiment. [Figure 11] Figure 11 is a cross-sectional view along the line XI-XI in Figure 10. [Figure 12] Figure 12 is a plan view showing a mounting member according to the first embodiment. [Figure 13] Figure 13 is a perspective view showing a mounting member according to the first embodiment. [Figure 14] Figure 14 is a rear view showing a mounting member according to the first embodiment. [Figure 15] Figure 15 is a front view showing the first joint according to the first embodiment. [Figure 16] Figure 16 is a perspective view showing a first joint according to a modified example of the first embodiment. [Figure 17A] Figure 17A shows the first position of the mounting member according to this modified example. [Figure 17B] Figure 17B shows the second position of the mounting member according to this modified example. [Figure 18]FIG. 18 is a plan view showing the first joint when the mounting member according to this modified example is in the first position. [Figure 19] FIG. 19 is a plan view showing the first joint when the mounting member according to this modified example is in the second position. [Figure 20] FIG. 20 is a cross-sectional view showing the first joint according to the second embodiment. [Figure 21] FIG. 21 is a cross-sectional view showing the first joint according to the second embodiment. [Figure 22] FIG. 22 is a cross-sectional view showing the first joint according to the second embodiment. [Figure 23] FIG. 23 is a cross-sectional view showing the first joint according to the third embodiment. [Figure 24] FIG. 24 is a cross-sectional view showing the first joint according to the third embodiment. [Figure 25] FIG. 25 is a cross-sectional view showing the first joint according to the fourth embodiment. [Figure 26] FIG. 26 is a cross-sectional view showing the first joint according to the fourth embodiment. [Figure 27] FIG. 27 is a cross-sectional view showing the first joint according to the fourth embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0012] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and the description thereof will not be repeated. Also, in the drawings, for ease of understanding, the X-axis, Y-axis, and Z-axis of the three-dimensional orthogonal coordinate system are appropriately shown.

[0013] In this specification, a direction parallel to the central axis AX1 of the first joint (for example, FIG. 3) is described as the "axial direction AD1". Also, a direction orthogonal to the central axis AX1 is described as the "radial direction RD1". The "radial direction RD1" may be any direction as long as it is orthogonal to the central axis AX1 and is not particularly limited. Also, a direction along an arc centered on the central axis AX1 is described as the "circumferential direction CD1".

[0014] Furthermore, the direction parallel to the central axis AX2 of the second joint (for example, Figure 1) is described as "axial AD2". Also, the direction perpendicular to the central axis AX2 is described as "radial RD2". "Radial RD2" can be any direction as long as it is perpendicular to the central axis AX2, and is not particularly limited. Also, the direction along the arc centered on the central axis AX2 is described as "circumferential CD2".

[0015] Furthermore, in this specification, “parallel directions” include substantially parallel directions, and “orthogonal directions” include substantially orthogonal directions. Moreover, in this specification, “ring shape,” “cylindrical shape,” “annular shape,” “tubular shape,” “circular shape,” and “wave shape” do not represent shapes in a strict sense, but rather include shapes that can, for example, realize the function of the first or second joint in this disclosure.

[0016] (First Embodiment) The first joint 100 and the second joint 200 according to the first embodiment of this disclosure will be described with reference to Figures 1 to 15. First, the second joint 200 will be described with reference to Figures 1 and 2.

[0017] Figure 1 is a perspective view showing a second joint 200 according to an embodiment of the present disclosure. As shown in Figure 1, the second joint 200 has a central axis AX2. The second joint 200 extends in an axial direction AD2 along the central axis AX2. The second joint 200 is a male joint. In this embodiment, the "front" of the second joint 200 indicates the side that is inserted into the first joint 100 (Figure 3). The "rear" of the second joint 200 indicates the side that is inserted into the tube TB2.

[0018] The second joint 200 has a projection 204. Specifically, the second joint 200 has a plug portion 201 and an insertion portion 202. The plug portion 201 and the insertion portion 202 are connected in the axial direction AD2. The plug portion 201 has a plug body 203, a projection 204, and a connecting body 205.

[0019] The plug body 203 has a cylindrical shape. The projection 204 protrudes from the outer circumferential surface of the second joint 200. Specifically, the projection 204 protrudes from the outer circumferential surface of the plug body 203 toward the radially outward direction RD2. The projection 204 extends along the circumferential direction CD2. The projection 204 has an annular shape. The projection 204 widens relative to the central axis AX2 from the front end 203a to the rear end 206a of the axial direction AD2 of the second joint 200. In other words, the diameter of the projection 204 increases from the front end 203a to the rear end 206a of the second joint 200. The projection 204 is located on the rear end 203b side of the axial direction AD2 of the plug body 203.

[0020] The connecting body 205 is connected to the rear end 203b of the plug body 203. The connecting body 205 and the plug body 203 are constructed as a single component (a single molded product). The connecting body 205 has a cylindrical shape.

[0021] The insertion portion 202 is inserted into the tube TB2. Specifically, the insertion portion 202 has an insert body 206, a connecting body 207, and a plurality of protrusions 212. The insert body 206 is inserted into the tube TB2. The insert body 206 has a cylindrical shape. The protrusions 212 project outward in the radial direction RD2 from the outer circumferential surface of the insert body 206. The protrusions 212 have an annular shape. The diameter of the protrusions 212 increases from the rear end 206a to the front end 203a of the axial direction AD2 of the second joint 200.

[0022] The connecting body 207 is connected to the rear end portion 206b of the insert 206 at its axial direction AD2. The connecting body 207 and the insert 206 are constructed as a single component (a single molded product). The connecting body 207 has a cylindrical shape.

[0023] The connector 205 of the plug portion 201 fits into the connector 207 of the insertion portion 202. As a result, the plug portion 201 and the insertion portion 202 are connected.

[0024] Figure 2 is a cross-sectional view along the line II-II in Figure 1. Figure 2 shows the second joint 200 separated from the first joint 100. In other words, it shows the second joint 200 not connected to the first joint 100. As shown in Figure 2, the plug portion 201 further includes a plug valve portion 208, an elastic member 209, a sealing member 210, a sealing member 211, and a flow path 213. The insertion portion 202 further includes a flow path 214. The flow paths 213 and 214 extend along the axial AD2. The front end of the axial AD2 of the flow path 214 is connected to the rear end of the axial AD2 of the flow path 213. In other words, the flow paths 213 and 214 are connected.

[0025] The plug valve portion 208 is positioned in the flow path 213 at the front end 203a side of the plug body 203. The plug valve portion 208 is pushed from the rear end 203b side to the front end 203a side of the plug body 203 by the elastic member 209. The plug valve portion 208 closes the flow path 213 at the front end 203a side of the plug body 203. A sealing member 210 is attached to the outer circumferential surface of the plug valve portion 208. The sealing member 210 is an elastic material and has an annular shape. The sealing member 210 seals the flow path 213 at the front end 203a side of the plug body 203.

[0026] The elastic member 209 is placed in the flow path 213. The elastic member 209 is elastic. The elastic member 209 is, for example, a compression coil spring. A sealing member 211 is attached to the outer circumferential surface of the connecting body 205. The sealing member 211 is elastic and has an annular shape. The sealing member 211 seals the space between the outer circumferential surface of the connecting body 205 and the inner circumferential surface of the connecting body 207.

[0027] Next, the first joint 100 will be described with reference to Figures 3 to 6. Figure 3 is a perspective view showing the first joint 100 according to this embodiment. Figure 4 is an exploded perspective view showing the first joint 100.

[0028] As shown in Figures 3 and 4, the first joint 100 has a central axis AX1. The first joint 100 extends in the axial direction AD1 along the central axis AX1. The first joint 100 is a female joint. The first joint 100 is connected to the second joint 200 (Figure 1) along the central axis AX1. In this embodiment, the "front" of the first joint 100 indicates the side into which the second joint 200 is inserted. The "rear" of the first joint 100 indicates the side into which the tube TB1 is inserted.

[0029] The first joint 100 comprises a first joint body 1, a mounting member 3, an operating part 71, and an elastic member 11. Specifically, the first joint 100 has an operating member 7, which in turn has an operating part 71. The first joint body 1 extends along the axial direction AD1. The first joint body 1 connects to the second joint 200 (Figure 1) along the central axis AX1. The mounting member 3 is attached to the outer circumferential surface of the first joint body 1. Details of the mounting member 3 will be described later. The operating member 7, when operated by an operator, switches the connection state between the first joint body 1 and the second joint 200 between a locked state and an unlocked state. The locked state indicates that the connection between the first joint body 1 and the second joint 200 cannot be released. The unlocked state indicates that the connection between the first joint body 1 and the second joint 200 can be released. The elastic member 11 supports the operating member 7. As an example, a push button is composed of an operating member 7 (operating part 71) and an elastic member 11.

[0030] Specifically, the first joint body 1 has a socket portion 5 and an insertion portion 9. The socket portion 5 and the insertion portion 9 are connected in the axial direction AD1. The plug portion 201 (Figure 1) of the second joint 200 is inserted into the socket portion 5. The mounting member 3 is attached to the outer circumferential surface of the socket portion 5.

[0031] The socket portion 5 has a socket body 50. The plug body 203 (Figure 1) of the second joint 200 is inserted into the socket body 50. The socket body 50 has a cylindrical shape.

[0032] The socket body 50 has an opening 51. The opening 51 has a circular shape. The opening 51 is located on the front end 5a side of the socket body 50. The opening 51 opens in the axial direction AD1.

[0033] Continuing with reference to Figures 3 and 4, the configuration related to the operating member 7 and the operating member 7 itself will be described. The socket body 50 further has a through hole 52 and a recess 53. The through hole 52 penetrates the socket body 50 in the direction Da of axial intersection. The direction Da of axial intersection intersects with respect to the central axis AX1. In this embodiment, the direction Da of axial intersection is perpendicular to the central axis AX1. The operating member 7 is positioned in the through hole 52 along the direction Da of axial intersection. The recess 53 is recessed in the direction Da of axial intersection relative to the outer circumferential surface of the socket body 50. The elastic member 11 is positioned in the recess 53 along the direction Da of axial intersection. The elastic member 11 is elastic. The elastic member 11 is, for example, a compression coil spring. The elastic member 11 expands and contracts in the direction Da of axial intersection. The elastic member 11 is positioned between the operating part 71 of the operating member 7 and the bottom surface 53a of the recess 53. The elastic member 11 supports the operating part 71.

[0034] The socket body 50 further has a pair of contact portions 54. In Figures 3 and 4, only one contact portion 54 is shown. The operating member 7 further has a pair of connecting portions 72, a pair of stopper portions 73, an opening 74, and an axially opposed portion 75.

[0035] One side D1 and the other side D2 of the axial intersection direction Da are defined. One side D1 indicates the direction from the axially opposing part 75 toward the operating part 71 (first direction) when the operating member 7 is positioned in the through hole 52. The other side D2 indicates the direction from the operating part 71 toward the axially opposing part 75 (second direction) when the operating member 7 is positioned in the through hole 52.

[0036] The pair of connecting parts 72 extend along the direction Da, which is the direction of the axial intersection. The pair of connecting parts 72 connect the operating part 71 and the axially opposed part 75. In other words, the operating part 71 is connected to the axially opposed part 75 by the pair of connecting parts 72. The connecting parts 72 are columnar in shape. The operating part 71, the pair of connecting parts 72, and the axially opposed part 75 define the opening 74. The opening 74 opens in the axial direction AD1.

[0037] The pair of stopper portions 73 are positioned at both ends of the axially opposing portion 75 in direction Db. Direction Db is perpendicular to the axial intersection direction Da and the axial direction AD1. As shown in Figure 3, with the operating member 7 positioned in the through hole 52, the pair of stopper portions 73 face the pair of contact portions 54 in the axial intersection direction Da. Specifically, with the stopper portion 73 and the contact portion 54 facing each other, the contact portion 54 is located on one side D1 of the stopper portion 73, and the stopper portion 73 is located on the other side D2 of the contact portion 54. The pair of contact portions 54 face each other in direction Db. The through hole 52 is provided between the pair of contact portions 54.

[0038] When the operating member 7 is positioned in the through hole 52, the elastic member 11 pushes the operating part 71 toward one side D1 in the direction Da that intersects the axes. In this case, the stopper part 73 of the operating member 7 contacts the contact part 54 in the direction Da that intersects the axes. Therefore, the stopper part 73 prevents the operating member 7 from coming out of the through hole 52 toward one side D1 in the direction Da that intersects the axes. In other words, the operating member 7 is held in the socket body 50 when it is positioned in the through hole 52. The position of the operating member 7 when the stopper part 73 is in contact with the contact part 54 is sometimes referred to as the "initial position".

[0039] On the other hand, when the operating member 7 is positioned in the through hole 52, if a force is applied to the operating member 7 toward the other side D2 in the direction Da intersecting the axes, the operating member 7 moves from its initial position toward the other side D2 in the direction Da intersecting the axes, against the elastic force of the elastic member 11. When the force on the operating member 7 is released, the elastic force of the elastic member 11 causes the operating member 7 to move toward the other side D1 in the direction Da intersecting the axes until the stopper portion 73 contacts the contact portion 54. In other words, the operating member 7 returns to its initial position.

[0040] Continuing with reference to Figures 3 and 4, the insertion part 9 is inserted into the tube TB1. Specifically, the insertion part 9 has an insert body 91, a connecting body 92, and a plurality of projections 93. The insert body 91 is inserted into the tube TB1. The insert body 91 has a cylindrical shape. The projections 93 protrude from the outer circumferential surface of the insert body 91 toward the radially outward direction RD1. The projections 93 have an annular shape. The diameter of the projections 93 increases from the rear end 91a to the front end 5a of the axial AD1 of the first joint 100.

[0041] The connecting body 92 is connected to the socket portion 5. The connecting body 92 is connected to the rear end portion 91b of the axial AD1 of the insert 91. The connecting body 92 and the insert 91 are constructed as a single component (a single molded product). The connecting body 92 has a cylindrical shape.

[0042] Next, the internal structure of the first joint 100 will be described with reference to Figure 5. Figure 5 is a cross-sectional view along the VV line in Figure 3. Figure 5 shows the state in which the first joint 100 is separated from the second joint 200. In other words, it shows the state in which the first joint 100 is not connected to the second joint 200.

[0043] As shown in Figure 5, the socket portion 5 further comprises a connecting body 55, a socket valve portion 56, a stem portion 57, an elastic member 58, sealing members 59, 60, 61, and 65, a flow path 62, and a plug placement portion 63. The plug body 203 (Figure 1) is placed in the plug placement portion 63. Specifically, the plug placement portion 63 has a plug placement space 67, and the plug body 203 is placed in the plug placement space 67. The plug placement portion 63 also has a projection placement portion 66, and the projection 204 (Figure 1) of the plug body 203 is placed in the projection placement portion 66. The insertion portion 9 further comprises a flow path 94. The first joint body 1 further comprises an overhang portion 64. Specifically, the socket body 50 of the socket portion 5 has an overhang portion 64. Details of the overhang portion 64 will be described later.

[0044] The flow paths 94 and 62 and the plug placement space 67 extend along the axial AD1. The front end of the axial AD1 of flow path 94 is connected to the rear end of the axial AD1 of flow path 62. In other words, flow path 94 and flow path 62 are connected. Also, the front end of the axial AD1 of flow path 62 is connected to the rear end of the axial AD1 of the plug placement space 67. In other words, flow path 62 and plug placement space 67 are connected. The front end of the axial AD1 of plug placement space 67 is connected to the opening 74. In other words, plug placement space 67 is connected to the opening 74. Also, the opening 74 is connected to the opening 51 in the axial AD1.

[0045] The connecting body 55 is connected to the protruding portion 64 of the socket body 50. The protruding portion 64 is located at the rear end of the axial direction AD1 of the socket body 50. The connecting body 55 and the socket body 50 are constructed as a single component (a single molded product). The connecting body 55 has a cylindrical shape.

[0046] The connector 55 of the socket portion 5 fits into the connector 92 of the insertion portion 9. As a result, the socket portion 5 and the insertion portion 9 are connected.

[0047] The socket valve portion 56 has a cylindrical shape. The socket valve portion 56 is positioned at the rear end of the plug placement space 67. The socket valve portion 56 is pushed by an elastic member 58 from the protruding portion 64 side of the socket body 50 towards the front end 5a side. The socket valve portion 56 closes the rear end of the plug placement space 67. A sealing member 65 is positioned in the plug placement space 67. The sealing member 65 is an elastic material and has an annular shape. The rear end of the plug placement space 67 is sealed by the sealing member 65 contacting the outer circumferential surface of the socket valve portion 56.

[0048] The stem portion 57 extends along the axial direction AD1. The front end portion 57a ​​of the stem portion 57 along the axial direction AD1 is positioned at the rear end portion of the plug placement space 67. In the example shown in Figure 5, the front end portion 57a ​​is positioned inside the socket valve portion 56. A sealing member 60 is attached to the outer circumferential surface of the front end portion 57a. The sealing member 60 is an elastic material and has an annular shape. The sealing member 60 seals the space between the outer circumferential surface of the stem portion 57 and the inner circumferential surface of the socket valve portion 56. In addition, a sealing member 61 is positioned in the plug placement space 67. The sealing member 61 is positioned closer to the front end 5a of the socket body 50 than the sealing member 65.

[0049] The elastic member 58 is positioned in the flow path 62. The elastic member 58 is elastic. The elastic member 58 is, for example, a compression coil spring. A sealing member 59 is attached to the outer circumferential surface of the connecting body 55. The sealing member 59 is elastic and has an annular shape. The sealing member 59 seals the space between the outer circumferential surface of the connecting body 55 and the inner circumferential surface of the connecting body 92.

[0050] Next, the operating member 7 will be described with reference to Figures 5 and 6. Figure 5 shows the operating member 7 when the axially opposing portion 75 is in the initial position Z0. As shown in Figure 5, when the operating member 7 (operating portion 71) is stationary, pushed by the elastic member 11 to one side D1 in the axially intersecting direction Da, the axially opposing portion 75 is in the initial position Z0. In the initial position Z0, the axially opposing portion 75 faces the projection arrangement portion 66 in the axial direction AD1. In other words, in the initial position Z0, the axially opposing portion 75 is located in front of the projection arrangement portion 66 in the axial direction AD1.

[0051] Figure 6 shows the operating member 7 when the axially opposing portion 75 is in the open position Z1. As shown in Figure 6, when an external force is applied to the operating member 7 (operating portion 71) toward the other side D2 in the direction Da intersecting the axes, the operating member 7 (operating portion 71) is pushed toward the other side D2 in the direction Da intersecting the axes, against the elastic force of the elastic member 11, and comes to rest. As a result, the axially opposing portion 75 moves from the initial position Z0 to the open position Z1 and comes to rest. In the open position Z1, the axially opposing portion 75 is located toward the other side D2 in the direction Da intersecting the axes than the projection arrangement portion 66. Therefore, in the open position Z1, the axially opposing portion 75 does not face the projection arrangement portion 66 in the axial direction AD1. As a result, in the open position Z1, the front of the projection arrangement portion 66 in the axial direction AD1 is open. Note that the "external force" is, for example, applied by an operator to the operating member 7 (operating portion 71). For example, the operator pushes the operating portion 71 with their finger.

[0052] Next, with reference to Figure 7, the state in which the first joint 100 and the second joint 200 are connected will be explained. Figure 7 is a cross-sectional view showing the state in which the first joint 100 and the second joint 200 are connected. In the state in which the first joint 100 and the second joint 200 are connected, the central axis AX1 of the first joint 100 and the central axis AX2 of the second joint 200 coincide. Therefore, the axial directions AD1 and AD2 coincide, the radial directions RD1 and RD2 coincide, and the circumferential directions CD1 and CD2 coincide.

[0053] As shown in Figure 7, the first joint 100 and the second joint 200 constitute a pipe joint 300. In other words, the pipe joint 300 has the first joint 100 and the second joint 200.

[0054] When the plug body 203 is inserted into the socket body 50, the front end 203a of the axial AD1 of the plug body 203 comes into contact with the front end 56a of the axial AD1 of the socket valve portion 56. As a result, the socket valve portion 56 moves from one side D11 to the other side D12 of the axial AD1 due to the plug body 203. At the same time, the insertion of the plug body 203 into the socket body 50 causes the front end 57a of the axial AD1 of the stem portion 57 to come into contact with the front end 280b of the axial AD1 of the plug valve portion 208. As a result, the plug valve portion 208 moves from the other side D12 to the one side D11 of the axial AD1. Consequently, the flow path 213 of the plug portion 201 and the flow path 62 of the socket portion 5 are connected. Thus, liquid flows between the first joint 100 and the second joint 200.

[0055] Referring to Figure 7, we will now explain the case where the connection state between the first joint 100 and the second joint 200 is switched between a locked state and an unlocked state. When the first joint 100 and the second joint 200 are connected, the plug body 203 is placed in the plug placement area 63 (plug placement space 67) of the socket body 50. In this case, the projection 204 of the plug body 203 is placed in the projection placement area 66.

[0056] The operating member 7 is pushed by the elastic member 11 to one side D1 in the direction Da intersecting the axes. Therefore, the axially opposing portion 75 of the operating member 7 is in the initial position Z0. As a result, the projection 204 of the plug body 203 and the axially opposing portion 75 face each other in the axial direction AD1 and make contact. In other words, in the initial position Z0, the axially opposing portion 75 faces the projection 204 protruding from the outer circumferential surface of the second joint 200, with respect to the axial direction AD1 of the first joint body 1 from the front end 5a side of the axial direction AD1, when the first joint body 1 is connected to the second joint 200. Therefore, the connection between the first joint 100 and the second joint 200 becomes locked.

[0057] On the other hand, when an external force is applied to the actuation part 71 toward the other side D2 in the direction Da intersecting the axis, the axial opposing part 75 moves from the initial position Z0 to the open position Z1. In the open position Z1, the axial opposing part 75 does not face the projection 204 in the axial direction AD1. As a result, the front of the projection 204 in the axial direction AD1 is opened. Therefore, the connection state between the first joint 100 and the second joint 200 becomes unlocked. In other words, the lock on the connection state between the first joint 100 and the second joint 200 is released. Consequently, the second joint 200 can be separated from the first joint 100. Note that the "external force" is, for example, applied by an operator to the actuation member 7 (actuation part 71). For example, the operator pushes the actuation part 71 with their finger.

[0058] As described above with reference to Figure 7, the operating unit 71 operates along the direction Da of the axial intersection, thereby switching between the opposing state and the non-opposing state of the axial opposing portion 75 and the projection 204 in the axial direction AD1.

[0059] Next, the operating member 7 will be described with reference to Figures 4, 8, and 9. Figure 8 is a plan view showing the first joint 100. Figure 9 is a cross-sectional view along the line IX-IX in Figure 8.

[0060] As shown in Figures 4 and 8, the mounting member 3 has a cross-direction opposing portion 30. In this embodiment, the cross-direction opposing portion 30 has two opposing pieces 310. The two opposing pieces 310 face each other in direction Db (Figure 4).

[0061] As shown in Figure 9, the intersecting direction opposing portion 30, in the state where the axially opposing portion 75 and the projection portion 204 are facing each other (Figure 7), faces the operating portion 71 in the direction Da, which is the direction of the intersecting axis, between the first joint body 1 and the operating portion 71. Therefore, according to this embodiment, the intersecting direction opposing portion 30 restricts the movement of the operating portion 71 in the direction Da, which is the direction of the intersecting axis. As a result, malfunction of the operating portion 71 can be suppressed. Thus, it is possible to suppress the state in which the axially opposing portion 75 and the projection portion 204 are not facing each other due to a malfunction of the operating portion 71, and the connection state between the first joint 100 and the second joint 200 becomes an unlocked state.

[0062] Specifically, the actuating part 71 is pushed by the elastic member 11 (Figure 7) to one side D1 in the axial direction Da. The intersecting direction opposing part 30, in the state where the axial direction opposing part 75 and the projection 204 are facing each other (Figure 7), faces the actuating part 71 in the axial direction Da between the socket body 50 and the actuating part 71. Therefore, the intersecting direction opposing part 30 restricts the movement of the actuating part 71 to the other side D2 in the axial direction Da.

[0063] Furthermore, as shown in Figure 9, the mounting member 3 is located at a first position P1 in the axial direction AD1. The first position P1 indicates the position where the intersecting direction opposing portion 30 faces the operating portion 71 in the direction Da, which is the direction of the axial intersection.

[0064] Next, with reference to Figures 10 and 11, the case where the mounting member 3 is in the second position P2 will be described. Figure 10 is a plan view showing the first joint 100 when the mounting member 3 is in the second position P2. Figure 11 is a cross-sectional view along the line XI-XI in Figure 10.

[0065] As shown in Figures 10 and 11, the mounting member 3 is located in the second position P2. The second position P2 indicates a position where the intersecting direction opposing portion 30 is located away from the first position P1 in the axial direction AD1. In other words, the second position P2 indicates a position where the intersecting direction opposing portion 30 is located behind the first position P1 in the axial direction AD1. To put it another way, the second position P2 indicates a position where the intersecting direction opposing portion 30 is not facing the operating portion 71 in the axial direction Da. Therefore, when the mounting member 3 is located in the second position P2, the movement of the operating portion 7 along the axial direction Da is not restricted. As a result, the operator can easily separate the second joint 200 from the first joint 100 by pushing the operating portion 71 toward the other side D2 in the axial direction Da to release the lock by the axial direction opposing portion 75.

[0066] In this embodiment, as an example, the position of the mounting member 3 (first position P1 and second position P2) is indicated by the position of the opposing portions 30 in the axial direction AD1.

[0067] Next, the movement of the mounting member 3 will be described with reference to Figures 8 to 11. The mounting member 3 is movable along the axial direction AD1 between the first position P1 and the second position P2. Therefore, according to this embodiment, the operator can easily switch the connection state between the first joint 100 and the second joint 200 between the locked state and the unlocked state by moving the mounting member 3 along the axial direction AD1 between the first position P1 and the second position P2.

[0068] Furthermore, in this embodiment, as shown in Figures 9 and 11, the first joint body 1 has a first restricting portion 80. Specifically, the socket body 50 has the first restricting portion 80. The first restricting portion 80 restricts the movement of the intersecting direction opposing portion 30 between the first position P1 and the second position P2. Therefore, according to this embodiment, even if an unexpected force such as vibration is applied to the mounting member 3, it is possible to suppress the movement of the mounting member 3 from the first position P1 to the second position P2. As a result, even if an unexpected force such as vibration is applied to the mounting member 3, the movement of the operating member 7 in the direction Da intersecting the axis is restricted by the intersecting direction opposing portion 30. Thus, malfunction of the operating member 7 is effectively suppressed, and it is possible to prevent the connection between the first joint 100 and the second joint 200 from unintentionally becoming unlocked.

[0069] Furthermore, in this embodiment, the first restricting portion 80 extends in the axial direction AD1 in a cross-sectional view. The first restricting portion 80 has a wave shape in a cross-sectional view, for example. In the examples of Figures 9 and 11, the first restricting portion 80 has a first recess 81 and a protrusion 82. The first recess 81 is recessed inward in the radial direction RD1 with respect to the central axis AX1. The protrusion 82 connects to the first recess 81. The protrusion 82 also projects outward in the radial direction RD1. The protrusion 82 is located further in the axial direction AD1 than the first recess 81 with respect to the operating portion 71. In other words, the protrusion 82 is located behind the first recess 81 in the axial direction AD1. According to this embodiment, the first restricting portion 80 can be realized with a simple configuration such as the first recess 81 and the protrusion 82. Also, since the shape of the mounting member 3 only needs to be matched to the shape of the first restricting portion 80, a mounting member 3 with a simple configuration can be realized.

[0070] Specifically, the first recess 81 and the protrusion 82 each have an annular shape extending in the circumferential direction CD1. Furthermore, as shown in Figure 9, at the first position P1, the rear end 320 of the mounting member 3 in the axial direction AD1 fits into the first recess 81. The protrusion 82 is adjacent to the first recess 81 in the axial direction AD1. Therefore, movement of the mounting member 3 from the first position P1 to the second position P2 due to vibration or the like can be effectively suppressed.

[0071] In this embodiment, the first restricting portion 80 further has a second recess 83. The second recess 83 is recessed radially inward RD1. The second recess 83 connects to the protrusion 82. The second recess 83 is located further axially AD1 than the protrusion 82 relative to the operating portion 71. In other words, the second recess 83 is located behind the protrusion 82 in axial AD1. The first joint body 1 also has an overhang 64. The overhang 64 extends radially outward RD1 than the apex VT of the protrusion 82. In other words, the maximum outer diameter R1 of the overhang 64 is greater than or equal to the maximum outer diameter R2 of the protrusion 82 (Figure 6). The overhang 64 connects to the second recess 83 in axial AD1. The overhang 64 is located further axially AD1 than the second recess 83 relative to the operating portion 71. In other words, the overhang 64 is located behind the second recess 83 in axial AD1. Therefore, according to this embodiment, as shown in Figure 11, when the mounting member 3 is in the second position P2, it is possible to prevent the mounting member 3 from coming off to the rear in the axial direction AD1.

[0072] Specifically, the second recess 83 and the protruding portion 64 each have an annular shape extending in the circumferential direction CD1. Also, as shown in Figure 11, at the second position P2, the rear end portion 320 of the mounting member 3 in the axial direction AD1 fits into the second recess 83. The protrusion 82 is adjacent to the second recess 83 in the axial direction AD1. Therefore, movement of the mounting member 3 from the second position P2 to the first position P1 due to vibration or the like can be effectively suppressed.

[0073] Next, another function of the mounting member 3 will be described with reference to Figures 8, 10, 12, and 13. Figure 12 is a plan view showing the mounting member 3. Figure 13 is a perspective view showing the mounting member 3. As shown in Figures 12 and 13, the mounting member 3 further has a second restricting portion 84. As shown in Figure 8, when the mounting member 3 is in the first position P1, the second restricting portion 84 faces the end faces 710 of the operating portion 71 in the circumferential direction CD1. Therefore, the second restricting portion 84 restricts the movement of the operating portion 71 in the circumferential direction CD1. As a result, according to this embodiment, it is possible to prevent the intersecting direction opposing portion 30 from not facing the operating portion 71 in the axial intersecting direction Da. Thus, malfunction of the operating portion 71 can be effectively suppressed.

[0074] Specifically, the second restricting section 84 has a pair of inclined surfaces 840. The inclined surfaces 840 are inclined with respect to the central axis AX1. The pair of inclined surfaces 840 face each other with respect to the central axis AX1 from the front end 5a to the rear end 91a of the first joint body 1. Specifically, the pair of inclined surfaces 840 are inclined with respect to the central axis AX1 so that they approach each other from the front end 5a to the rear end 91a of the first joint body 1.

[0075] When the mounting member 3 is in the first position P1, the inclined surface 840 faces the end face 710 of the operating part 71 in the circumferential direction CD1 and contacts the end face 710.

[0076] In particular, in this embodiment, as shown in Figures 8 and 10, the second restricting portion 84 faces the circumferential CD1 with respect to both end faces 710 of the operating portion 71 in the circumferential CD1, both when the mounting member 3 is in the first position P1 and when the mounting member 3 is in the second position P2. Therefore, according to this embodiment, even when the mounting member 3 is in the second position P2, displacement of the operating portion 71 in the circumferential CD1 can be suppressed. As a result, operation of the operating portion 71 by the operator becomes easier.

[0077] As shown in Figure 10, when the mounting member 3 is in the second position P2, the inclined surface 840 of the second restricting portion 84 is separated from the end face 710 of the operating portion 71 in the circumferential direction CD1.

[0078] Next, another function of the mounting member 3 will be described with reference to Figures 8, 12, and 13. The mounting member 3 has a pair of inclined surfaces 85. The inclined surfaces 85 are inclined with respect to the central axis AX1. The pair of inclined surfaces 85 extend with respect to the central axis AX1 from the front end 5a to the rear end 91a of the first joint body 1. Therefore, according to this embodiment, it is easier for the worker to move the mounting member 3 from the first position P1 to the second position P2.

[0079] Next, another function of the mounting member 3 will be described with reference to Figures 8, 12, and 13. The mounting member 3 has a pair of planes 86. The pair of planes 86 intersect in the axial direction AD1. Therefore, according to this embodiment, it is easier for the worker to move the mounting member 3 from the second position P2 to the first position P1.

[0080] Next, with reference to Figures 8 and 12, yet another function of the mounting member 3 will be described. The mounting member 3 further has a third recess 88. The third recess 88 is recessed in the axial direction AD1. The elastic member 11 is positioned to overlap with the third recess 88 in the direction Da (Figure 4), which is axially intersecting. The elastic member 11 also supports the operating part 71 in the direction Da, which is axially intersecting. Therefore, according to this embodiment, contact between the elastic member 11 and the mounting member 3 can be suppressed. As a result, it is possible to suppress the elastic member 11 from coming off the first joint body 1.

[0081] Specifically, the third recess 88 is recessed in the axial direction AD1 from the front end 5a to the rear end 91a of the first joint body 1. The third recess 88 is located between the socket body 50 and the operating part 71.

[0082] Next, another function of the mounting member 3 will be described with reference to Figures 4 and 13-15. Figure 14 is a rear view showing the mounting member 3. As shown in Figures 13 and 14, the mounting member 3 has a curved portion 87 and an opening 873. The curved portion 87 curves along the circumferential direction CD1 with respect to the central axis AX1. As shown in Figure 4, the curved portion 87 fits onto the outer circumferential surface of the first joint body 1 (socket body 50). Therefore, according to this embodiment, the mounting member 3 can be easily attached to the first joint body 1, and the mounting member 3 can be easily removed from the first joint body 1. Furthermore, even if there is an overhanging portion 64, the mounting member 3 can be easily attached to the first joint body 1 (socket body 50).

[0083] Figure 15 is a front view showing the first joint 100. As shown in Figure 15, in the curved portion 87, the angle θ between one end 871 and the other end 872 of the circumferential CD1 of the curved portion 87 with respect to the central axis AX1 is 230 degrees or more and 250 degrees or less. Therefore, according to this embodiment, the mounting member 3 can be attached to the first joint body 1 (socket body 50) more easily, and the mounting member 3 can be prevented from coming off the first joint body 1 (socket body 50) due to vibration or the like.

[0084] As shown in Figures 13 and 14, the curved portion 87 has a first surface portion 881 and a second surface portion 882. The first surface portion 881 is located at one end of the circumferential CD1 of the curved portion 87. The first surface portion 881 extends along the direction Da which intersects the axes. The second surface portion 882 is located at the other end of the circumferential CD1 of the curved portion 87. The second surface portion 882 extends along the direction Da which intersects the axes. The first surface portion 881 and the second surface portion 882 are parallel. Therefore, according to this embodiment, the opening 873 of the curved portion 87 does not curve and its width does not change, making it easier to attach the mounting member 3 to the first joint body 1 (socket body 50).

[0085] (modified version) Referring to Figures 16 to 19, a modified version of the first embodiment, the first joint 100A, will be described. This modified version differs from the first embodiment in that the mounting member 3A rotates in the circumferential direction CD1. The differences between this modified version and the first embodiment will be mainly described below.

[0086] Figure 16 is a perspective view showing a modified first joint 100A according to the first embodiment. As shown in Figure 16, the first joint 100A has a mounting member 3A. The mounting member 3A is mounted on the first joint body 1 (socket body 50). The mounting member 3A is curved along the circumferential direction CD1. One end 21 and the other end 22 of the mounting member 3A face each other in the circumferential direction CD1. The one end 21 and the other end 22 of the mounting member 3A are spaced apart in the circumferential direction CD1. Therefore, the mounting member 3A has a space SP between one end 21 and the other end 22 of the mounting member 3A.

[0087] Figure 17A shows the first position P1 of the mounting member 3A. Figure 17B shows the second position P2 of the mounting member 3A. Figure 18 shows the first joint 100A when the mounting member 3A is in the first position P1. Figure 19 shows the first joint 100A when the mounting member 3A is in the second position P2.

[0088] As shown in Figures 17A and 17B, the mounting member 3A is rotatable between a first position P1 and a second position P2 along the circumferential direction CD1 with respect to the central axis AX1. The first position P1 is the position where the intersecting direction opposing portion 30 faces the operating portion 71 in the axial intersecting direction Da. As shown in Figure 18, at the first position P1, the operating portion 71 and the intersecting direction opposing portion 30 face each other in the axial intersecting direction Da. Therefore, the intersecting direction opposing portion 30 restricts the movement of the operating portion 71 along the axial intersecting direction Da. As a result, malfunction of the operating member 7 can be suppressed. The second position P2 is the position where the intersecting direction opposing portion 30 is located away from the first position P1 in the circumferential direction CD1. As shown in Figure 19, at the second position P2, the operating portion 71 faces space SP in the axial intersecting direction Da. Therefore, the movement of the operating member 7 along the axial intersecting direction Da is not restricted. As a result, the operator can easily release the lock by pushing the operating member 7 to the other side D2 in the direction Da that intersects the axis. Note that the first position P1 and the second position P2 are separated in the circumferential direction CD1 with respect to the central axis AX1.

[0089] As described above with reference to Figures 16 to 19, according to this modified example, the connection state between the first joint 100A and the second joint 200 can be easily switched between a locked state and an unlocked state by rotating the mounting member 3A in the circumferential direction CD1.

[0090] (Second embodiment) The first joint 2100 according to the second embodiment of this disclosure will be described with reference to Figures 20 to 22. Figures 20 and 21 are cross-sectional views showing the first joint 2100 according to the second embodiment. Figures 20 and 21 show the state in which the first joint 2100 is separated from the second joint 200. Figure 20 shows the operating member 2007 when it is in the initial position Z0. Figure 21 shows the operating member 2007 when it is in the open position Z1.

[0091] In the first joint 100 according to the first embodiment, the intersecting portion 30 of the mounting member 3 faces the operating portion 71 in the direction Da, which is axially intersecting with respect to the operating portion 71, between the first joint body 1 and the operating portion 71. In contrast, in the first joint 2100 according to the second embodiment, the mounting member 2003 has a mounting member projection 2003a that is positioned in the hole 2071a of the operating portion 2071. The following describes the differences between the second embodiment and the first embodiment, and the description of parts that overlap with the first embodiment will be omitted.

[0092] The first joint 2100 comprises a first joint body 2001, a mounting member 2003, an operating part 2071, and an elastic member 2011. Specifically, the first joint 2100 has an operating member 2007, and the operating member 2007 has an operating part 2071. The operating part 2071 has a hole 2071a. The hole 2071a only needs to extend along the axial direction AD1 and does not need to penetrate the operating part 2071, and may have a cylindrical shape, for example.

[0093] The first joint body 2001 extends along the axial direction AD1. The first joint body 2001 is connected to the second joint 200 along the central axis AX1. The mounting member 2003 is attached to the outer surface of the first joint body 2001. The operating member 2007, when operated by an operator, switches the connection state between the first joint body 2001 and the second joint 200 between a locked state and an unlocked state. The elastic member 2011 supports the operating member 2007. As an example, the operating member 2007 (operating part 2071) and the elastic member 2011 constitute a push button.

[0094] Specifically, the first joint body 2001 has a socket portion 2005 and an insertion portion 9. The socket portion 2005 has a socket body 2050.

[0095] The configuration related to the actuarial member 2007 and the actuarial member 2007 will be described with reference to Figures 20 and 21. The socket body 2050 further has a housing portion 2052. The housing portion 2052 has a through hole on one side D1 in the axial direction Da of the socket body 2050, and the inner circumferential surface of the other side D2 in the axial direction Da of the socket body 2050 is recessed in the axial direction Da. The actuarial member 2007 is positioned in the housing portion 2052 along the axial direction Da. The elastic member 2011 is positioned in the housing portion 2052 along the axial direction Da. The elastic member 2011 is elastic. The elastic member 2011 is, for example, a compression coil spring. The elastic member 2011 expands and contracts in the axial direction Da. The elastic member 2011 is positioned between the actuating member 2007 and the bottom surface 2052a of the housing 2052. The elastic member 2011 supports the actuating member 2007.

[0096] The operating member 2007 further includes a pair of connecting parts (not shown) and an axially opposed part 2075. The pair of connecting parts connect the operating member 2071 and the axially opposed part 2075.

[0097] When the operating member 2007 is positioned in the housing 2052, the elastic member 2011 pushes the operating member 2071 to one side D1 in the axial direction Da. In the initial position Z0, the axially opposing portion 2075 faces the projection arrangement portion 66 in the axial direction AD1. In other words, in the initial position Z0, the axially opposing portion 2075 is located axially AD1 forward of the projection arrangement portion 66. Therefore, the connection between the first joint 2100 and the second joint 200 becomes locked.

[0098] On the other hand, when the operating member 2007 is positioned in the housing 2052, if a force is applied to the operating member 2007 toward the other side D2 in the direction Da intersecting the axis, the operating member 2007 moves from the initial position Z0 toward the other side D2 in the direction Da intersecting the axis, against the elastic force of the elastic member 2011. As a result, the axially opposing portion 2075 moves from the initial position Z0 to the open position Z1 and comes to rest. In the open position Z1, the axially opposing portion 2075 is located on the other side D2 in the direction Da intersecting the axis, relative to the projection arrangement portion 66. Therefore, in the open position Z1, the axially opposing portion 2075 does not face the projection arrangement portion 66 in the axial direction AD1. As a result, in the open position Z1, the front of the projection arrangement portion 66 in the axial direction AD1 is opened. Thus, the connection state between the first joint 2100 and the second joint 200 becomes an unlocked state.

[0099] When the force on the actuator 2007 is released, the elastic force of the elastic member 2011 causes the actuator 2007 to move toward one side D1 in the direction Da intersecting the axes. In other words, the actuator 2007 returns to its initial position Z0.

[0100] As described above with reference to Figures 20 and 21, the operating unit 2071 operates along the direction Da of the axial intersection, thereby switching between the opposing state and the non-opposing state of the axial opposing unit 2075 and the projection 204 in the axial direction AD1.

[0101] The first joint 2100 according to the second embodiment will be described with reference to Figures 20 to 22. Figure 22 is a cross-sectional view showing the first joint 2100 according to the second embodiment. Figure 22 shows the state in which the first joint 2100 is separated from the second joint 200. Figure 22 shows the operating member 2007 when it is in the initial position Z0.

[0102] As shown in Figures 20 to 22, the mounting member 2003 has a mounting member projection 2003a. The mounting member projection 2003a is an example of a mounting member restricting portion. The shape of the mounting member projection 2003a is not particularly limited, as long as it can be inserted into the hole 2071a, and is, for example, a cylinder.

[0103] The mounting member projection 2003a is positioned in the hole 2071a of the operating part 2071 when the axially opposing part 2075 and the projection 204 are facing each other. Therefore, according to the second embodiment, the mounting member projection 2003a restricts the movement of the operating part 2071 in the direction Da, which is the direction of the axial intersection. As a result, malfunction of the operating part 2071 can be suppressed. Thus, malfunction of the operating part 2071 can be prevented from causing the axially opposing part 2075 and the projection 204 to become non-opposing, and the connection between the first joint 2100 and the second joint 200 to become unlocked.

[0104] Furthermore, the mounting member 2003 is located at a first position P1 in the axial direction AD1. The first position P1 indicates the position where the mounting member projection 2003a is positioned in the hole 2071a. The first position P1 also indicates the position of the mounting member 2003 in Figure 22.

[0105] On the other hand, the mounting member 2003 is located at the second position P2. The second position P2 indicates a position where the mounting member projection 2003a is located axially AD1 away from the first position P1. In other words, the second position P2 indicates a position where the mounting member projection 2003a is located axially AD1 behind the first position P1. To put it another way, the second position P2 indicates a position where the mounting member projection 2003a is not positioned in the hole 2071a. Furthermore, the second position P2 indicates the position of the mounting member 2003 in Figures 20 and 21. Therefore, when the mounting member 2003 is located at the second position P2, the movement of the operating member 2007 along the axial crossing direction Da is not restricted. As a result, the operator can easily separate the second joint 200 from the first joint 2100 by pushing the operating part 2071 toward the other side D2 in the axial crossing direction Da to release the lock by the axial opposing part 2075.

[0106] In the second embodiment, for example, the position of the mounting member 2003 (first position P1 and second position P2) is indicated by the position of the mounting member projection 2003a in the axial direction AD1.

[0107] Next, the movement of the mounting member 2003 will be described. The mounting member 2003 is movable along the axial direction AD1 between a first position P1 and a second position P2. Therefore, according to the second embodiment, by moving the mounting member 2003 along the axial direction AD1 between the first position P1 and the second position P2, the operator can easily switch the connection state between the first joint 2100 and the second joint 200 between a locked state and an unlocked state.

[0108] (Third embodiment) The first joint 3100 according to the third embodiment of this disclosure will be described with reference to Figures 23 and 24. Figures 23 and 24 are cross-sectional views showing the first joint 3100 according to the third embodiment. Figures 23 and 24 show the state in which the first joint 3100 is separated from the second joint 200. Figure 23 shows the operating member 3007 when in the initial position Z0 and the mounting member 3003 when in the first position P1. Figure 24 shows the operating member 3007 when in the open position Z1 and the mounting member 3003 when in the second position P2.

[0109] In the first joint 2100 according to the second embodiment, the mounting member 2003 has a mounting member projection 2003a that is positioned in the hole 2071a of the operating part 2071, whereas in the first joint 3100 according to the third embodiment, the mounting member 3003 has a cover portion 3003a that is positioned radially outward RD1 than the radially outward surface RD1 of the operating part 3071. The following describes the differences between the third embodiment and the second embodiment, and the description of parts that overlap with the second embodiment will be omitted.

[0110] The first joint 3100 comprises a first joint body 3001, a mounting member 3003, an operating part 3071, and an elastic member 3011. Specifically, the first joint 3100 has an operating member 3007, and the operating member 3007 has an operating part 3071.

[0111] The first joint body 3001 extends along the axial direction AD1. The first joint body 3001 connects to the second joint 200 along the central axis AX1. The mounting member 3003 is attached to the outer circumferential surface of the first joint body 3001. The operating member 3007, when operated by an operator, switches the connection state between the first joint body 3001 and the second joint 200 between a locked state and an unlocked state. The elastic member 3011 supports the operating member 3007. As an example, the operating member 3007 (operating part 3071) and the elastic member 3011 constitute a push button.

[0112] Specifically, the first joint body 3001 has a socket portion 3005 and an insertion portion 9. The socket portion 3005 has a socket body 3050.

[0113] The configuration related to the operating member 3007 and the operating member 3007 will be described with reference to Figures 23 and 24. The socket body 3050 further has a housing portion 3052. The housing portion 3052 has a through hole on one side D1 in the axial direction Da of the socket body 3050, and the inner circumferential surface of the other side D2 in the axial direction Da of the socket body 3050 is recessed in the axial direction Da. The operating member 3007 is positioned in the housing portion 3052 along the axial direction Da. The elastic member 3011 is positioned in the housing portion 3052 along the axial direction Da. The elastic member 3011 is positioned between the operating member 3007 and the bottom surface 3052a of the housing portion 3052.

[0114] The operating member 3007 further has a pair of connecting parts (not shown) and an axially opposed part 3075. The pair of connecting parts connect the operating member 3071 and the axially opposed part 3075.

[0115] When the operating member 3007 is positioned in the housing portion 3052, the elastic member 3011 pushes the operating member 3071 to one side D1 in the axial direction Da. In the initial position Z0, the axially opposing portion 3075 faces the projection arrangement portion 66 in the axial direction AD1. That is, in the initial position Z0, the axially opposing portion 3075 is positioned axially AD1 forward of the projection arrangement portion 66. Therefore, the connection between the first joint 3100 and the second joint 200 is locked. Also, in the initial position Z0, the outer surface of the radial direction RD1 of the operating member 3007 and the outer surface of the radial direction RD1 of the first joint body 3001 are substantially flush. Note that the outer surface of the radial direction RD1 of the operating member 3007 may be positioned radially inward in the radial direction RD1 than the outer surface of the radial direction RD1 of the first joint body 3001.

[0116] On the other hand, when the operating member 3007 is positioned in the housing 3052, if a force is applied to the operating member 3007 toward the other side D2 in the direction Da intersecting the axis, the operating member 3007 moves from the initial position Z0 toward the other side D2 in the direction Da intersecting the axis, against the elastic force of the elastic member 3011. As a result, the axial opposing portion 3075 moves from the initial position Z0 to the open position Z1 and comes to rest. In the open position Z1, the axial opposing portion 3075 is located on the other side D2 in the direction Da intersecting the axis than the projection arrangement portion 66. Therefore, in the open position Z1, the axial opposing portion 3075 does not face the projection arrangement portion 66 in the axial direction AD1. As a result, in the open position Z1, the front of the projection arrangement portion 66 in the axial direction AD1 is opened. Thus, the connection state between the first joint 3100 and the second joint 200 becomes an unlocked state.

[0117] When the force on the actuator 3007 is released, the elastic force of the elastic member 3011 causes the actuator 3007 to move toward one side D1 in the direction Da intersecting the axes. In other words, the actuator 3007 returns to its initial position Z0.

[0118] As described above with reference to Figures 23 and 24, the operating unit 3071 operates along the direction Da of the axial intersection, thereby switching between the opposing state and the non-opposing state of the axial opposing unit 3075 and the projection 204 in the axial direction AD1.

[0119] As shown in Figures 23 and 24, the mounting member 3003 has a cover portion 3003a. The cover portion 3003a is an example of a mounting member restricting portion. The cover portion 3003a is, for example, a plate-shaped body.

[0120] The cover portion 3003a is positioned radially outward of the radial RD1 outer surface of the operating portion 3071 when the axially opposing portion 3075 and the projection portion 204 are facing each other. In other words, the cover portion 3003a covers the radially outward RD1 outer surface of the operating portion 3071. Therefore, according to the third embodiment, contact with the operating portion 3071 is prevented by the cover portion 3003a. In other words, according to the third embodiment, the movement of the operating portion 3071 in the axial crossing direction Da is restricted by the cover portion 3003a. As a result, malfunction of the operating portion 3071 can be suppressed. Thus, malfunction of the operating portion 3071 can be prevented from causing the axially opposing portion 3075 and the projection portion 204 to become non-opposing, and the connection state between the first joint 3100 and the second joint 200 to become unlocked.

[0121] Furthermore, the mounting member 3003 is located at a first position P1 in the axial direction AD1. The first position P1 indicates the position where the cover portion 3003a faces the operating portion 3071 in the direction Da, which is perpendicular to the axis. The first position P1 also indicates the position of the mounting member 3003 in Figure 23.

[0122] On the other hand, the mounting member 3003 is located at the second position P2. The second position P2 indicates a position where the cover portion 3003a is located away from the first position P1 in the axial direction AD1. In other words, the second position P2 indicates a position where the cover portion 3003a is located behind the first position P1 in the axial direction AD1. To put it another way, the second position P2 indicates a position where the cover portion 3003a is not facing the operating portion 3071 in the axial direction Da. Also, the second position P2 indicates the position of the mounting member 3003 in Figure 24. Therefore, when the mounting member 3003 is located at the second position P2, contact with the operating portion 3007 is not obstructed. As a result, the operator can easily separate the second joint 200 from the first joint 3100 by pushing the operating portion 3071 to the other side D2 in the axial direction Da, thereby releasing the lock by the axial opposing portion 3075.

[0123] In the third embodiment, as an example, the position of the mounting member 3003 (first position P1 and second position P2) is indicated by the position of the cover portion 3003a in the axial direction AD1.

[0124] Next, the movement of the mounting member 3003 will be described. The mounting member 3003 is movable along the axial direction AD1 between a first position P1 and a second position P2. Therefore, according to the third embodiment, by moving the mounting member 3003 along the axial direction AD1 on the outer surface of the radial direction RD1 of the socket body 3050 between the first position P1 and the second position P2, the operator can easily switch the connection state between the first joint 3100 and the second joint 200 between a locked state and an unlocked state.

[0125] (Fourth embodiment) The first joint 4100 according to the fourth embodiment of this disclosure will be described with reference to Figures 25 to 27. Figures 25 and 26 are cross-sectional views showing the first joint 4100 according to the fourth embodiment. Figures 25 and 26 show the state in which the first joint 4100 is separated from the second joint 200. Figure 25 shows the operating member 4007 when in the initial position Z0 and the mounting member 4003 when in the first position P1. Figure 26 shows the operating member 4007 when in the open position Z1 and the mounting member 4003 when in the second position P2.

[0126] In the first joint 3100 according to the third embodiment, at the first position P1, the inner surface of the radial RD1 of the cover portion 3003a and the outer surface of the radial RD1 of the operating portion 3071 are in contact, whereas in the first joint 4100 according to the fourth embodiment, at the first position P1, the inner surface of the radial RD1 of the cover portion 4003a and the outer surface of the radial RD1 of the operating portion 4071 face each other with a space between them. The following describes the differences between the fourth embodiment and the third embodiment, and the description of parts that overlap with the third embodiment will be omitted.

[0127] The first joint 4100 includes a first joint body 4001, a mounting member 4003, an operating part 4071, and an elastic member 4011. Specifically, the first joint 4100 includes an operating member 4007, and the operating member 4007 includes an operating part 4071.

[0128] The first joint body 4001 extends along the axial direction AD1. The first joint body 4001 connects to the second joint 200 along the central axis AX1. The mounting member 4003 is attached to the outer circumferential surface of the first joint body 4001. The operating member 4007, when operated by an operator, switches the connection state between the first joint body 4001 and the second joint 200 between a locked state and an unlocked state. The elastic member 4011 supports the operating member 4007. As an example, the operating member 4007 (operating part 4071) and the elastic member 4011 constitute a push button.

[0129] Specifically, the first joint body 4001 has a socket portion 4005 and an insertion portion 9. The socket portion 4005 has a socket body 4050.

[0130] Referring to Figure 25, the configuration related to the actuarial member 4007 and the actuarial member 4007 will be described. The socket body 4050 further has a housing portion 4052. The housing portion 4052 has a through hole on one side D1 in the axial direction Da of the socket body 4050, and the inner circumferential surface of the other side D2 in the axial direction Da of the socket body 4050 is recessed in the axial direction Da. The actuarial member 4007 is positioned in the housing portion 4052 along the axial direction Da. The elastic member 4011 is positioned in the housing portion 4052 along the axial direction Da. The elastic member 4011 is positioned between the actuarial member 4007 and the bottom surface 4052a of the housing portion 4052.

[0131] The operating member 4007 further has a pair of connecting parts (not shown) and an axially opposed part 4075. The pair of connecting parts connect the operating member 4071 and the axially opposed part 4075.

[0132] When the operating member 4007 is positioned in the housing portion 4052, the elastic member 4011 pushes the operating member 4071 to one side D1 in the direction Da which intersects the axes. In the initial position Z0, the axially opposing portion 4075 faces the projection arrangement portion 66 in the axial direction AD1. In other words, in the initial position Z0, the axially opposing portion 4075 is positioned axially AD1 forward of the projection arrangement portion 66. Therefore, the connection between the first joint 4100 and the second joint 200 is locked. Also, in the initial position Z0, the radially outer surface RD1 of the operating member 4007 is positioned radially outward than the radially outer surface RD1 of the first joint body 4001.

[0133] On the other hand, when the operating member 4007 is positioned in the housing 4052, if a force is applied to the operating member 4007 toward the other side D2 in the direction Da intersecting the axis, the operating member 4007 moves from the initial position Z0 toward the other side D2 in the direction Da intersecting the axis, against the elastic force of the elastic member 4011. As a result, the axial opposing portion 4075 moves from the initial position Z0 to the open position Z1 and comes to rest. In the open position Z1, the axial opposing portion 4075 is located on the other side D2 in the direction Da intersecting the axis than the projection arrangement portion 66. Therefore, in the open position Z1, the axial opposing portion 4075 does not face the projection arrangement portion 66 in the axial direction AD1. As a result, in the open position Z1, the front of the projection arrangement portion 66 in the axial direction AD1 is open. Thus, the connection state between the first joint 4100 and the second joint 200 becomes an unlocked state.

[0134] When the force on the actuator 4007 is released, the elastic force of the elastic member 4011 causes the actuator 4007 to move toward one side D1 in the direction Da intersecting the axes. In other words, the actuator 4007 returns to its initial position Z0.

[0135] As described above with reference to Figures 25 and 26, the actuation unit 4071 operates along the direction Da of the axial intersection, thereby switching between the opposing state and the non-opposing state of the axial opposing portion 4075 and the projection 204 in the axial direction AD1.

[0136] As shown in Figures 25 and 26, the mounting member 4003 has a cover portion 4003a. The cover portion 4003a is an example of a mounting member restricting portion. The cover portion 4003a is, for example, a plate-shaped body.

[0137] The cover portion 4003a is positioned radially outward of the radial RD1 outer surface of the operating portion 4071 when the axially opposing portion 4075 and the projection portion 204 are facing each other. In other words, the cover portion 4003a covers the radially outward surface of the operating portion 4071. Therefore, according to the fourth embodiment, contact with the operating portion 4071 is prevented by the cover portion 4003a. In other words, according to the fourth embodiment, the movement of the operating portion 4071 in the axial crossing direction Da is restricted by the cover portion 4003a. As a result, malfunction of the operating portion 4071 can be suppressed. Therefore, it is possible to suppress the axially opposing portion 4075 and the projection portion 204 from becoming non-opposing due to malfunction of the operating portion 4071, and the connection state between the first joint 4100 and the second joint 200 from becoming unlocked.

[0138] Furthermore, the mounting member 4003 is located at a first position P1 in the axial direction AD1. The first position P1 indicates the position where the cover portion 4003a faces the operating portion 4071 in the direction Da, which is perpendicular to the axis. Specifically, at the first position P1, the inner surface of the cover portion 4003a in the radial direction RD1 and the outer surface of the operating portion 4071 in the radial direction RD1 face each other with a space between them. The first position P1 also indicates the position of the mounting member 4003 in Figure 25.

[0139] On the other hand, the mounting member 4003 is located in the second position P2. The second position P2 indicates a position where the cover portion 4003a is located away from the first position P1 in the axial direction AD1. In other words, the second position P2 indicates a position where the cover portion 4003a is located behind the first position P1 in the axial direction AD1. To put it another way, the second position P2 indicates a position where the cover portion 4003a is not facing the operating portion 4071 in the axial direction Da. Also, the second position P2 indicates the position of the mounting member 4003 in Figure 26. Therefore, when the mounting member 4003 is located in the second position P2, contact with the operating portion 4007 is not obstructed. As a result, the operator can easily separate the second joint 200 from the first joint 4100 by pushing the operating portion 4071 to the other side D2 in the axial direction Da, thereby releasing the lock by the axially opposing portion 4075.

[0140] In the fourth embodiment, as an example, the position of the mounting member 4003 (first position P1 and second position P2) is indicated by the position of the cover portion 4003a in the axial direction AD1.

[0141] Next, the movement of the mounting member 4003 will be described. The mounting member 4003 is movable along the axial direction AD1 between a first position P1 and a second position P2. Therefore, according to the fourth embodiment, by moving the mounting member 4003 along the axial direction AD1 between the first position P1 and the second position P2, the operator can easily switch the connection state between the first joint 4100 and the second joint 200 between a locked state and an unlocked state. Furthermore, even if the cover portion 4003a is deflected by an external force, contact with the operating portion 4071 can be suppressed, thereby suppressing malfunction of the operating portion 4071.

[0142] Next, with reference to Figure 27, another function of the mounting member 4003 will be described. Figure 27 is a cross-sectional view showing the mounting member 4003. As shown in Figure 27, the mounting member 4003 further has a movement restricting portion 4084. The movement restricting portion 4084 is, for example, a pair of side walls. Each of the pair of side walls extends from the end of the cover portion 4003a along the axial direction Da. In detail, when the mounting member 4003 is in the first position P1, the movement restricting portion 4084 faces the end faces 4710 of the operating portion 4071 in the circumferential direction CD1. Thus, the movement restricting portion 4084 restricts the movement of the mounting member 4003 in the circumferential direction CD1. As a result, according to the fourth embodiment, it is possible to prevent the cover portion 4003a from no longer facing the operating portion 4071 in the axial direction Da. Thus, malfunction of the operating portion 4071 can be effectively prevented.

[0143] Furthermore, when the mounting member 4003 is in the first position P1, the movement restricting portion 4084 faces the end face 4710 of the operating portion 4071 in the circumferential direction CD1 and contacts the end face 4710.

[0144] Embodiments of the present disclosure have been described above with reference to the drawings. However, the present disclosure is not limited to the embodiments described above, and can be implemented in various forms without departing from its essence. Furthermore, the multiple components disclosed in the above embodiments can be modified as appropriate. For example, some components from all the components shown in one embodiment may be added to the components of another embodiment, or some components from all the components shown in one embodiment may be removed from the embodiment.

[0145] Furthermore, the drawings schematically show each component in order to facilitate understanding of the disclosure, and the thickness, length, number, spacing, etc. of each component shown may differ from the actual dimensions due to the convenience of drawing creation. Also, the configuration of each component shown in the above embodiments is merely an example and is not particularly limiting, and it goes without saying that various modifications are possible within the scope that does not substantially deviate from the effects of this disclosure.

[0146] [1] Mounting members 3 and 3A may be placed on the second joint 200.

[0147] Furthermore, this technology can be configured as follows:

[0148] (1) A first joint having a central axis and extending in the axial direction along the central axis, The first joint body is connected to the second joint along the aforementioned central axis, In the state in which the first joint body is connected to the second joint, the projection protruding from the outer circumferential surface of the second joint is opposed to the axially facing portion of the first joint body from the axial front end side, An operating unit connected to the axially opposing portion and operating along the axial intersection direction intersecting the central axis, thereby switching between an opposing state and a non-opposing state between the axially opposing portion and the projection in the axial direction, Mounting member attached to the outer circumferential surface of the first joint body and It has, The mounting member is a first joint having an operating part restricting portion that restricts the movement of the operating part when the axially opposing portion and the projection portion are in the opposing state.

[0149] (2) A first joint having a central axis and extending in the axial direction along the central axis, The first joint body is connected to the second joint along the aforementioned central axis, In the state in which the first joint body is connected to the second joint, the projection protruding from the outer circumferential surface of the second joint is opposed to the axially facing portion of the first joint body from the axial front end side, An operating unit connected to the axially opposing portion and operating along the axial intersection direction intersecting the central axis, thereby switching between an opposing state and a non-opposing state between the axially opposing portion and the projection in the axial direction, Mounting member attached to the outer circumferential surface of the first joint body and It has, The mounting member is a first joint having, in the state in which the axially opposing portion and the projection portion are facing each other, a portion in an intersecting direction that faces the operating portion in the direction intersecting the axis with respect to the operating portion, between the first joint body and the operating portion.

[0150] (3) The mounting member is movable between a first position and a second position along the axial direction, The first position indicates a position where the intersecting direction opposing portion faces the operating portion in the direction of the intersecting axis, The first joint according to (2), wherein the second position indicates a position where the intersecting opposing portion is located away from the first position in the axial direction.

[0151] (4) The first joint according to (3), wherein the first joint body has a first restricting portion that restricts the movement of the opposing portions in the intersecting direction between the first position and the second position.

[0152] (5) The first regulatory section is, A first recess that is recessed radially inward with respect to the central axis, The protrusion that connects to the first recess and protrudes radially outward It has, The first joint according to (4), wherein the protrusion is located further in the axial direction from the operating portion than the first recess.

[0153] (6) The first regulating portion further has a second recess that is recessed radially inward, The second recess is connected to the protrusion and is located further in the axial direction than the protrusion with respect to the operating part. The aforementioned first joint body is, The operating portion has a protruding portion that is connected to the second recess in the axial direction and is further located further in the axial direction than the second recess, The first joint according to (5), wherein the maximum outer diameter of the protruding portion is equal to or greater than the maximum outer diameter of the convex portion.

[0154] (7) The mounting member is A curved portion that curves along the circumferential direction with respect to the central axis, Opening and It has, The curved portion is a first joint according to any one of (2) to (6) that fits onto the outer circumferential surface of the first joint body.

[0155] (8) The first joint according to (7), wherein the angle between one end and the other end of the curved portion in the circumferential direction with respect to the central axis is 230 degrees or more and 250 degrees or less.

[0156] (9) The curved portion is A first surface portion located at one end of the circumferential direction of the curved portion and extending along the direction of the axial intersection, A second surface portion located at the other end of the curved portion in the circumferential direction and extending along the direction of the axial intersection, It has, The first joint according to (7) or (8), wherein the first surface portion and the second surface portion are parallel.

[0157] (10) The mounting member further has a second restricting portion that restricts the movement of the operating portion in the circumferential direction with respect to the central axis, The second restricting portion is a first joint according to any one of (3) to (9), which faces both end faces of the operating portion in the circumferential direction.

[0158] (11) The second restricting portion is the first joint according to (10), which faces in the circumferential direction with respect to both end faces of the operating portion in the circumferential direction when the mounting member is in the first position and when the mounting member is in the second position.

[0159] (12) The mounting member has a pair of inclined surfaces that are inclined with respect to the central axis, The pair of inclined surfaces extend from the front end to the rear end of the first joint body toward the central axis, the first joint according to any one of (2) to (11).

[0160] (13) The mounting member is the first joint according to any one of (2) to (12), having a pair of planes that intersect in the axial direction.

[0161] (14) Further comprising an elastic member having elasticity and arranged along the direction of the intersection of the axes, The mounting member further has a third recess that is recessed in the axial direction, The first joint according to any one of (2) to (13), wherein the elastic member is arranged to overlap with the third recess in the direction intersecting the axis and supports the operating part in the direction intersecting the axis.

[0162] (15) The mounting member is rotatable between a first position and a second position along the circumferential direction with respect to the central axis, The first position indicates a position where the intersecting direction opposing portion faces the operating portion in the direction of the intersecting axis, The first joint according to (2), wherein the second position indicates a position where the intersecting opposing portion is located away from the first position in the circumferential direction.

[0163] (16) The first joint described in any of (2) to (15), The aforementioned second joint and A pipe fitting having [the following characteristics].

[0164] (17) The operating part has a hole that extends along the axial direction, The mounting member has a mounting member projection that is positioned in the hole when the axially opposing portion and the projection are facing each other, as the operating portion restricting portion, as the mounting member.

[0165] (18) The first joint according to (1), wherein the mounting member has a cover portion which, as the operating portion restricting portion, is positioned radially outward from the radially outward surface of the operating portion in the state in which the axially opposing portion and the projection portion are facing each other.

[0166] (19) The mounting member is movable between a first position and a second position along the axial direction, The first position indicates a position where the cover portion faces the operating portion in the direction intersecting the axis, The second position indicates a position where the cover portion is located away from the first position in the axial direction. In the first position, the radially inner surface of the cover portion and the radially outer surface of the operating portion face each other with a space between them, the first joint as described in (18).

[0167] (20) The mounting member further has a movement restricting portion that restricts the movement of the mounting member in the circumferential direction with respect to the central axis, The operating part is positioned radially outward from the radially outward surface of the first joint body in the state in which the axially opposing part and the projection part are facing each other. The movement restricting portion is the first joint according to (18) or (19), which, in the state in which the axially opposing portion and the projection portion are facing each other, faces both end faces of the operating portion in the circumferential direction.

[0168] (21)(1) or the first joint described in any of (17) to (20), The aforementioned second joint and A pipe fitting having [the following characteristics]. [Industrial applicability]

[0169] This disclosure can be used, for example, in first joints and pipe joints. [Explanation of Symbols]

[0170] 1. First joint body 3, 3A Mounting Member 11 Elastic members 30 Opposing section in the intersecting direction 64 Overhang 71 Operating part 75 Axial opposing section 80 First Regulatory Department 81 First recess 82 Convex part 83 Second recess 84 Second Regulatory Department 85 Slope 86 plane 87 Curved section 88 Third recess 100, 100A First joint 200 Second joint 204 Protrusion 881 First page 882 Second surface section 2003a Mounting member projection (operating part restricting part) 3003a, 4003a Cover section (operating part restricting section) 2071a Hole AX1 center axis

Claims

1. A first joint having a central axis and extending in the axial direction along the central axis, The first joint body is connected to the second joint along the aforementioned central axis, In the state in which the first joint body is connected to the second joint, the projection protruding from the outer circumferential surface of the second joint is opposed to the axially facing portion of the first joint body from the axial front end side, An operating unit connected to the axially opposing portion and operating along the axial intersection direction intersecting the central axis, thereby switching between an opposing state and a non-opposing state between the axially opposing portion and the projection in the axial direction, Mounting member attached to the outer circumferential surface of the first joint body and It has, The mounting member is a first joint having, in the state in which the axially opposing portion and the projection portion are facing each other, a portion in an intersecting direction that faces the operating portion in the direction intersecting the axis with respect to the operating portion, between the first joint body and the operating portion.

2. The mounting member is movable between a first position and a second position along the axial direction. The first position indicates a position where the intersecting direction opposing portion faces the operating portion in the direction of the intersecting axis, The first joint according to claim 1, wherein the second position indicates a position where the intersecting opposing portion is located away from the first position in the axial direction.

3. The first joint according to claim 2, wherein the first joint body has a first restricting portion that restricts the movement of the opposing portions in the intersecting direction between the first position and the second position.

4. The aforementioned first regulatory department, A first recess that is recessed radially inward with respect to the central axis, The protrusion that connects to the first recess and protrudes radially outward It has, The first joint according to claim 3, wherein the protrusion is located further in the axial direction from the operating portion than the first recess.

5. The first regulating portion further has a second recess that is recessed radially inward, The second recess is connected to the protrusion and is located further in the axial direction than the protrusion with respect to the operating part. The aforementioned first joint body is, The operating portion has a protruding portion that is connected to the second recess in the axial direction and is further located further in the axial direction than the second recess, The first joint according to claim 4, wherein the maximum outer diameter of the protruding portion is greater than or equal to the maximum outer diameter of the convex portion.

6. The aforementioned mounting member is A curved portion that curves along the circumferential direction with respect to the central axis, Opening and, It has, The curved portion fits onto the outer circumferential surface of the first joint body, the first joint according to any one of claims 1 to 5.

7. The first joint according to claim 6, wherein the angle between one end and the other end of the curved portion in the circumferential direction with respect to the central axis is 230 degrees or more and 250 degrees or less.

8. The curved portion is A first surface portion located at one end of the circumferential direction of the curved portion and extending along the direction of the axial intersection, A second surface portion located at the other end of the curved portion in the circumferential direction and extending along the direction of the axial intersection, It has, The first joint according to claim 6, wherein the first surface portion and the second surface portion are parallel.

9. The mounting member further includes a second restricting portion that restricts the movement of the operating portion in the circumferential direction relative to the central axis, The first joint according to any one of claims 2 to 5, wherein the second restricting portion faces both end faces of the operating portion in the circumferential direction.

10. The first joint according to claim 9, wherein the second restricting portion faces the end faces of the operating portion in the circumferential direction when the mounting member is in the first position and when the mounting member is in the second position.

11. The mounting member has a pair of inclined surfaces that are inclined with respect to the central axis, The first joint according to any one of claims 1 to 5, wherein the pair of inclined surfaces extend from the front end to the rear end of the first joint body with respect to the central axis.

12. The mounting member has a pair of planes that intersect in the axial direction, the first joint according to any one of claims 1 to 5.

13. It further comprises an elastic member that is arranged along the direction of the intersection of the axes and has elasticity, The mounting member further has a third recess that is recessed in the axial direction, The first joint according to any one of claims 1 to 5, wherein the elastic member is arranged to overlap with the third recess in the direction intersecting the axis, and supports the operating part in the direction intersecting the axis.

14. The mounting member is rotatable between a first position and a second position along the circumferential direction with respect to the central axis. The first position indicates a position where the intersecting direction opposing portion faces the operating portion in the direction of the intersecting axis, The first joint according to claim 1, wherein the second position indicates a position where the intersecting opposing portion is located away from the first position in the circumferential direction.

15. A first joint according to any one of claims 1 to 5, The aforementioned second joint and A pipe fitting having [the following characteristics].

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