JP2018087622A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint which enables a handle to be disposed therein without increasing a size in a longitudinal axis direction.SOLUTION: A joint includes a handle member 40 which is attached so as to protrude from an outer peripheral surface 12a of a pipeline holding member 12 to the radial outer side and is formed so as to be gripped by a worker. A sleeve 32 holding a locking element 24 from the radial outer side has a cutout 48, which receives the handle member 40, at its rear end part 32a. The sleeve 32 can be displaced to a release position with the cutout 48 receiving the handle member 40 when its circumferential rotation position is in an alignment position in which the cutout 48 and the handle member 40 are aligned. When the rotation position is in a non-alignment position in which the cutout 48 and the handle member 40 are not aligned, the rear end part 32a of the sleeve 32 interferes with the handle member 40 to inhibit the sleeve 32 from being displaced from a holding position to the release position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint that removably connects a corresponding piping member.

  In a pipe joint composed of a socket and a plug, a so-called one-touch type pipe joint in which the connection is completed by inserting the plug into the socket is well known. A socket for such a pipe joint usually includes a cylindrical side wall portion that defines an insertion space into which a plug is inserted, a locking element that is held in a through hole formed in the cylindrical side wall portion, and a cylindrical side wall portion. And a sleeve for holding the lock from the outside. The sleeve is located between a holding position where a part of the locking element protrudes into the insertion space and holds the plug, and a position where the locking element is displaced radially outward to unlock the plug. It can be displaced by. When the plug is inserted into the socket insertion space in order to connect to the socket, the locking element is displaced to a position where the plug is locked, and the sleeve is displaced to the holding position to hold the locking element at the position where the lock is locked to the plug. At the same time, the plug is pressed by the seal member disposed in the insertion space of the socket, and the flow path of the socket and the flow path of the plug are sealed and communicated. As a result, the plug is connected to the socket. When releasing the connection, the plug is pulled out of the socket so that the sleeve is displaced to the release position so that the lock can be displaced to the position where the engagement with the plug is released.

  Moreover, in the same kind of pipe joint shown by patent document 1, the notch is formed in the rear-end part of a sleeve, and the pin which protrudes to a radial direction outer side is arrange | positioned at the outer peripheral surface of a socket. The sleeve can be displaced from the holding position to the release position only when the notch is in a rotational position that aligns with the pin, and when the notch and the pin are in a rotational position where the pin is not aligned, the rear end of the sleeve becomes the pin. It cannot be displaced from the holding position to the release position due to interference. This prevents the sleeve from being accidentally operated in the connected state and the connection from being released unexpectedly.

  In some cases, the socket structure of the pipe joint as in the cited document 1 is used as a joint for temporarily connecting another pipe to a pipe member such as a flange pipe during a pipe inspection process in a factory or the like. Since the target piping member usually has a larger diameter than the plug in the above-described pipe joint, the joint connected thereto is inevitably large. Moreover, the sealing member for sealing between a piping member and a coupling also becomes a big thing according to the diameter of a piping member. In order to seal and connect the joint to the piping member in the connecting operation, the seal member needs to be crushed to some extent between the connecting end surface of the joint and the connecting end surface of the piping member. The diameter increases as the diameter increases. Therefore, when the joint is locked and attached to the piping member as in the above-described pipe joint, the seal member is simultaneously crushed to seal between the flow paths. Is very difficult to do.

  Therefore, in the joint connected to the piping member, there is also a joint that can separately perform the operation of locking and attaching the joint to the piping member and the operation of crushing the sealing member to seal and communicate between the flow paths. Has been developed. Such a joint usually includes a pipe holding member having a cylindrical side wall that defines an insertion space, and a flow path member that has a flow path and is screwed into the pipe holding member so as to be displaceable in the direction of the longitudinal axis. Have. When connecting such a joint to a pipe member, the pipe member is first inserted into the joint insertion space so that the pipe member is held in the insertion space by the lock, and then the flow path member is piped. By rotating it with respect to the holding member and displacing it toward the piping member, the connecting end surface of the flow path member is pressed against the connecting end surface of the piping member, and the seal member therebetween is crushed to be in sealing engagement with each other. As a result, the flow path of the piping member and the flow path of the flow path member are sealed and communicated.

Japanese Utility Model Publication No. 51-69119

  The operation of rotating the flow path member in the joint connected to the piping member as described above is necessary for the seal member to be enlarged and crushed in accordance with the piping member having a relatively large diameter as described above. As the force increases, the joint itself may be large and heavy, and even if separated from the operation of locking the piping member, a relatively large force is required. For this reason, the rotation operation may be performed using a tool such as a spanner, but it is desirable that a handle be provided so that the operation can be easily performed without such a tool.

  However, the pipe holding member of the joint is provided with a sleeve that is displaceable in the direction of the longitudinal axis on the outer peripheral surface thereof and is also rotatable in the circumferential direction to prevent erroneous operation. If the handle is to be arranged so as not to interfere with the displacement of the sleeve, the handle is usually provided at a position further rearward of the sleeve when in the release position so as not to interfere with the sleeve. If it does so, the length in the direction of a longitudinal axis of a joint will become large, and a weight will also become large in connection with it.

  Accordingly, an object of the present invention is to provide a joint in which a handle is arranged without increasing the size in the direction of the longitudinal axis.

That is, the present invention
A joint for detachably connecting corresponding piping members,
A cylindrical side wall portion and a rear end wall portion defining an insertion space extending rearward from the front end opening, a locking element holding hole penetrating the cylindrical side wall portion in a radial direction of the cylindrical side wall portion, and the cylindrical side wall A pipe holding member having a female thread portion that penetrates the rear end wall portion in the direction of the longitudinal axis of the portion;
A locking position that is held in the locking element holding hole, protrudes inward from the inner peripheral surface of the cylindrical side wall portion, engages with the piping member inserted into the insertion space, and locks the piping member; A locking element that is displaceable between a locking release position that is located outside the locking position and releases the locking of the piping member;
A holding position that is disposed on the outer peripheral surface of the pipe holding member and engages the locking element from the outside in the radial direction to hold the locking element in the locking position, and is displaced rearward from the holding position and the locking element A sleeve that is displaceable in the direction of the longitudinal axis between the disengagement position that allows the disengagement to the unlocking position, and is rotatable in the circumferential direction of the pipe holding member;
A flow path member having an outer peripheral surface on which a male screw portion is formed and screwed into the female screw portion of the pipe holding member by the male screw portion, and extending rearward from a front end opening located in the insertion space A flow path member having a flow path to perform,
A handle member attached to the pipe holding member so as to protrude radially outward from the outer peripheral surface of the pipe holding member and gripped by an operator,
By rotating the flow path member in the circumferential direction relative to the pipe holding member, the flow path member is displaced forward with respect to the pipe holding member and inserted into the insertion space. The connection end surface of the flow path member is hermetically engaged with the connection end surface of the piping member held in the insertion space by the locking element in the locked position, and the flow path of the flow path member and the piping member A joint that communicates with the flow path,
The sleeve has a notch for receiving the handle member at a rear end;
The sleeve can be displaced from the holding position to the release position while receiving the handle member in the notch when the circumferential rotation position is at an alignment position where the notch and the handle member are aligned. When the rotational position is at an inconsistent position where the notch and the handle member are not aligned, the rear end portion interferes with the handle member and is displaced from the holding position to the release position. A joint is provided which is adapted to prevent this.

  In the joint, since the handle member attached to the pipe holding member is received in the notch of the sleeve when the sleeve is displaced from the holding position to the release position, the handle member is formed in the longitudinal direction of the pipe holding member. It becomes possible to arrange without increasing the length in the direction of the axis. In addition, since the sleeve is prevented from being displaced to the release position by the rear end portion interfering with the handle member by setting the rotational position to the misalignment position, the handle member prevents the sleeve from being erroneously operated. It will also have. That is, in the joint, there is no need to separately provide a pin that interferes with the sleeve, which is necessary in the prior art for the function of preventing erroneous operation.

  Preferably, the pipe holding member has a handle holding hole for slidably receiving the handle member, and the handle member is displaceable in the radial direction along the handle holding hole. Can do.

  With such a configuration, when carrying the joint or holding the joint attached to the pipe member, the handle member is pushed into the handle holding hole of the pipe holding member to protrude from the outer peripheral surface of the pipe holding member. The amount can be kept small so that the handle member does not get in the way. Further, when the operation of rotating the flow path member with respect to the pipe holding member is performed, the handle member can be largely pulled out so that the operator can easily grasp it.

  Preferably, the handle member has a sliding resistance member disposed between the handle member and the handle holding hole, and the handle member has an arbitrary resistance with respect to the handle holding hole by the sliding resistance force of the sliding resistance member. It can be made stationary at a radial position.

  With such a configuration, it is possible to prevent the handle member from being unintentionally displaced due to gravity.

Preferably,
Further provided on the outer peripheral surface of the flow path member is a rotational flow path connecting member that is rotatably disposed in the circumferential direction and has a flow path extending in the radial direction,
The flow path of the flow path member has an opening that opens to the outer peripheral surface of the flow path member;
The rotary flow path connecting member is disposed so as to cover the opening, and the flow path of the rotary flow path connecting member is sealed and communicated with the flow path of the flow path member with respect to the flow path member. Can be rotated.

  By connecting a pipe for supplying fluid to the pipe member via the joint to the rotary flow path connecting member, the pipe rotates together and twists when the flow path member is rotated. Can be prevented.

  Preferably, at a position rearward of the rotating flow path connecting member, the flow path member is attached to the flow path member so as to extend radially outward from the outer peripheral surface of the flow path member. It is possible to further include another handle member formed.

  By providing the handle member also on the side of the flow path member, the operation of rotating the flow path member with respect to the pipe holding member can be performed more easily.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a joint according to the present invention will be described with reference to the accompanying drawings.

It is a figure which shows the state before the connection of the joint which concerns on one Embodiment of this invention. It is a figure which shows the state by which the flange of the piping member is inserted in the insertion space of the coupling of FIG. 1, and the flange is hold | maintained in the insertion space. It is a figure which shows the state which the flow path of the joint of FIG. 1 and the flow path of a piping member are sealingly connected. It is a figure which shows the state which the connection of the piping member by the coupling of FIG. 1 was completed.

  A joint 10 according to an embodiment of the present invention removably connects a piping member 1 having a flange 2 as shown in FIG. 1, and has a piping holding having an insertion space 20 for receiving the flange 2 of the piping member 1. A member 12 and a flow path member 50 having a flow path 62 connected to the flow path 3 of the piping member 1 are provided.

  The pipe holding member 12 has a cylindrical side wall portion 14 and a rear end wall portion 16, and an insertion space 20 extending rearward from the front end opening 18 is defined by the cylindrical side wall portion 14 and the rear end wall portion 16. Is done. The cylindrical side wall portion 14 is formed with a locker holding hole 22 penetrating in the radial direction, and a spherical locker 24 is held therein. The rear end wall portion 16 is formed with a female screw portion 26 that penetrates in the direction of the longitudinal axis L. The locking element 24 held in the locking element holding hole 22 is substantially located at a locking position (FIG. 2-4) protruding inward from the inner peripheral surface 14a of the cylindrical side wall portion 14 and outside the locking position. 1 to the locking release position (FIG. 1) that does not protrude from the inner peripheral surface 14a of the cylindrical side wall portion 14. A slide member 30 urged forward by a spring 28 is provided in the insertion space 20, and in a non-connected state in FIG. 1, the locker 24 is supported by the slide member 30 from the radially inner side. Held in the unlocked position.

  A sleeve 32 is disposed on the outer peripheral surface 12 a of the pipe holding member 12. The sleeve 32 engages with the locking element 24 from the outside in the radial direction to hold the locking element 24 in the locking position (FIG. 2-4), and is displaced rearward from the holding position so that the locking element 24 moves to the unlocking position. It can be displaced in the direction of the longitudinal axis L with respect to the release position (FIG. 1) that allows displacement. The sleeve 32 is biased forward by a spring 34, that is, toward the holding position. In the unconnected state of FIG. 1, the locking element receiving recess 36 at the front end of the sleeve 32 is engaged with the locking element 24 held in the unlocking position by the slide member 30, so that the sleeve 32 is held in the released position. Has been.

  A handle holding hole 38 extending in the radial direction is formed in the pipe holding member 12, and a cylindrical handle member 40 is held in the handle holding hole 38. The handle member 40 is located radially along the handle holding hole 38 in the radial direction of the pipe holding member 12 (FIGS. 1, 2, and 4) and radially outward from the position. It is possible to displace between the position (FIG. 3) that protrudes greatly. The handle member 40 is formed with a groove 40b extending in the axial direction on the circumferential side surface 40a thereof. Bolts 42 are attached to the pipe holding member 12 so as to partially protrude into the handle holding hole 38. The bolt 42 is attached so as to extend into the groove 40 b of the handle member 40. When the handle member 40 is displaced outward in the radial direction, the bolt 42 is engaged with the step 40c at the lower end of the groove 40b as shown in FIG. 3, so that the handle member 40 is removed from the handle holding hole 38. It is preventing. Further, when the handle member 40 is about to rotate, the bolt 42 is engaged with the side wall of the groove 40b, thereby preventing the rotation. An annular groove 40d is formed on the circumferential side surface 40a of the handle member 40, and a rubber O-ring 44 is attached to the annular groove 40d as a sliding resistance member. A sliding frictional resistance is generated between the handle member 40 and the handle holding hole 38 by the O-ring 44. The handle member 40 is stationary at an arbitrary position by sliding frictional resistance by the O-ring 44. The pipe holding member 12 is further formed with an air hole 46 extending from the lower end portion of the handle holding hole 38 to the rear end surface 12b of the pipe holding member 12. The air hole 46 is used to allow air to flow in and out of the handle holding hole 38 when the handle member 40 sealed against the inner peripheral surface of the handle holding hole 38 is displaced by the O-ring 44. is there.

  A notch 48 is formed in the rear end portion 32a of the sleeve 32. When the sleeve 32 is in the release position, the notch 48 receives the handle member 40 as shown in FIG.

  The flow path member 50 has a male threaded portion 52 on its outer peripheral surface 50 a, and the male threaded portion 52 is attached to the pipe holding member 12 by being screwed into the female threaded portion 26 of the pipe holding member 12. A seal member 56 for sealingly engaging with the connection end surface 4 of the piping member 1 is attached to the connection end surface 54 that is the front end surface of the flow path member 50 located in the insertion space 20. Further, the flow path member 50 is formed with a flow path 62 that extends rearward from the front end opening 58 formed in the connection end surface 54 to the opening 60 that opens to the outer peripheral surface 50a. The flow path 62 includes a first flow path portion 62a extending rearward from the front end opening 58 and four extending in the radial direction in the vicinity of the rear end of the first flow path portion 62a (only two are visible in the drawing). The second flow path portion 62b includes a groove-shaped third flow path portion 62c that extends in the circumferential direction on the outer peripheral surface 50a and communicates with the four second flow path portions 62b. Accordingly, the opening 60 has a belt shape that makes one round in the circumferential direction.

  On the outer peripheral surface 50a of the flow path member 50, there is provided a rotary flow path connecting member 64 disposed so as to be rotatable in the circumferential direction. One channel 66 extending in the radial direction is formed in the rotary channel connecting member 64. The inner peripheral surface of the rotating flow path connecting member 64 is hermetically engaged with the outer peripheral surface 50 a of the flow path member 50 by two seal members 68. Since the opening 60 of the flow path 62 of the flow path member 50 has a continuous belt shape in the circumferential direction, the flow path 66 of the rotary flow path connection member 64 is the same as that of the rotary flow path connection member 64 in the circumferential direction. Even if it exists in the position, it can maintain the state sealed and connected with the flow path 62 of the flow path member 50. That is, the rotating flow path connecting member 64 can rotate in a state where the flow path 66 is sealed and communicated with the flow path 62 of the flow path member 50.

  Further, another rod-like handle member 70 is attached to the flow channel member 50 and is disposed so as to penetrate the flow channel member 50 in the radial direction at a position behind the rotary flow channel coupling member 64. The handle member 70 extends radially outward from the outer peripheral surface 50 a so that both ends thereof are located outside the outer peripheral surface 50 a of the flow path member 50.

  When connecting the joint 10 to the corresponding pipe member 1, the joint 10 is brought close to the pipe member 1 so as to insert the flange 2 of the pipe member 1 into the insertion space 20 from the state of FIG. 1. Then, the slide member 30 is pushed backward by the connection end surface 4 of the flange 2. When the flange 2 is inserted to a position where it passes through the locking element 24, the locking element 24 is pushed by the sleeve 32 and displaced radially inward as shown in FIG. At the same time, the sleeve 32 is displaced forward to the holding position by the urging force of the spring 34 and holds the locking element 24 in the locking position. As a result, the piping member 1 is in a state where the flange 2 is held in the insertion space 20 and cannot be pulled out from the insertion space 20. However, at this point, a gap can be formed between the connection end face 54 of the flow path member 50 and the connection end face 4 of the piping member 1, and the flow path member 50 and the piping member 1 are still sealed. Not engaged.

  Next, the handle member 40 on the pipe holding member 12 side is pulled out and gripped radially outward, and the handle member 40 on the flow path member 50 side is also gripped so that the flow path member 50 is attached to the pipe holding member 12. Rotate relatively. Then, the flow path member 50 is displaced forward with respect to the pipe holding member 12, and the connection end face 4 of the pipe member 1 is sealed to the connection end face 4 of the pipe member 1 via the seal member 56 as shown in FIG. It will be in the engaged state. As a result, the flow path 62 of the flow path member 50 is connected to the flow path 3 of the piping member 1 in a sealed manner and in communication. When a pipe (not shown) for supplying a fluid to the flow path 66 of the rotary flow path connecting member 64 is already connected, the rotary flow path connecting member 64 is rotated when the flow path member 50 is rotated. Since it rotates with respect to the flow path member 50, it is possible to prevent the piping from rotating and twisting together with the flow path member 50. Alternatively, when a pipe joint (not shown) is attached to the rotary flow path connecting member 64 and the pipe is connected via the pipe joint after the connection of the joint 10 is completed, the connection is completed. The rotary flow path connecting member 64 can be rotated to set the pipe joint to an arbitrary position where the pipe can be easily connected.

  In the connected state, the handle member 40 is pushed inward in the radial direction so that the handle member 40 protruding greatly outward in the radial direction does not get in the way, and most of the handle member 40 is put into the handle holding hole 38 as shown in FIG. It is good also as the accommodated state.

  As shown in FIG. 2, after the flange 2 of the piping member 1 is held in the insertion space 20, the sleeve 32 is rotated in the circumferential direction so that the notch 48 and the handle member 40 are not aligned (see FIG. 2). 3 and 4), it is possible to prevent the connection from being unexpectedly released due to an erroneous operation of the sleeve 32. That is, by setting the sleeve 32 to the misalignment position, the rear end portion 32a of the sleeve 32 interferes with the handle member 70 when the sleeve 32 is displaced rearward toward the release position. Will not be able to be displaced to the release position. Therefore, even if a backward force is accidentally applied to the sleeve 32, the connection is not released.

  When releasing the connection, an operation opposite to the connection operation described above may be performed. That is, the handle member 40 on the pipe holding member 12 side is pulled out radially outward (FIG. 3), and the flow path member 50 is rotated to connect the connection end face 54 of the flow path member 50 and the connection end face 4 of the pipe member 1. While releasing the sealing engagement, the sleeve 32 is rotated to the alignment position where the notch 48 is aligned with the handle member 40 (FIG. 2), and the sleeve 32 is further displaced rearwardly to the release position to thereby connect the piping member. 1 is pulled out from the insertion space 20 (FIG. 1). It should be noted that the handle member 40 is received in the notch 48 when the sleeve 32 is displaced to the release position.

  In the joint 10, the handle member 40 attached to the pipe holding member 12 is received by the notch 48 of the sleeve 32 when the sleeve 32 is displaced from the holding position to the release position. Can be arranged at a position where the length of the pipe holding member 12 in the direction of the longitudinal axis L is not increased. Further, when the sleeve 32 is rotated in the connected state so that the notch 48 and the handle member 40 are not aligned, the rear end portion 32 a of the sleeve 32 interferes with the handle member 40, and the sleeve 32. Cannot be displaced to the release position. In other words, the handle member 40 can provide a function of preventing the sleeve 32 from being erroneously operated. With such a structure, there is no need to separately provide a pin that interferes with the sleeve, which was necessary in the prior art.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the piping member 1 connected to the joint 10 does not necessarily have the flange 2. Alternatively, the handle member 70 on the flow channel member 50 side may be shaped and arranged so as not to penetrate the flow channel member 50, and the flow channel 62 may be a straight flow channel that extends straight in the direction of the longitudinal axis L. Further, the handle member 40 on the pipe holding member 12 side may be fixed to the pipe holding member 12 so as not to be displaced in the radial direction, and the O-ring 44 as a sliding resistance member is attached to the handle holding hole 38. It may be.

Piping member 1; flange 2; flow path 3; connection end face 4;
Joint 10; Pipe holding member 12; Outer peripheral surface 12a; Rear end surface 12b; Cylindrical side wall portion 14; Inner peripheral surface 14a; Rear end wall portion 16: Front end opening 18; Insertion space 20: Locker holding hole 22; A female thread portion 26; a spring 28; a slide member 30; a sleeve 32; a rear end portion 32a; a spring 34; a lock receiving portion 36; a handle holding hole 38; a handle member 40; a circumferential side surface 40a; An annular groove 40d; a bolt 42; an O-ring 44; an air hole 46; a notch 48; a flow path member 50; an outer peripheral surface 50a; an external thread portion 52; a connection end surface 54; a seal member 56; a front end opening 58; Path 62; first channel portion 62a; second channel portion 62b; third channel portion 62c; rotating channel connecting member 64; channel 66; seal member 68; handle member 70; longitudinal axis L;

Claims (5)

A joint for detachably connecting corresponding piping members,
A cylindrical side wall portion and a rear end wall portion defining an insertion space extending rearward from the front end opening, a locking element holding hole penetrating the cylindrical side wall portion in a radial direction of the cylindrical side wall portion, and the cylindrical side wall A pipe holding member having a female thread portion that penetrates the rear end wall portion in the direction of the longitudinal axis of the portion;
A locking position that is held in the locking element holding hole, protrudes inward from the inner peripheral surface of the cylindrical side wall portion, engages with the piping member inserted into the insertion space, and locks the piping member; A locking element that is displaceable between a locking release position that is located outside the locking position and releases the locking of the piping member;
A holding position that is disposed on the outer peripheral surface of the pipe holding member and engages the locking element from the outside in the radial direction to hold the locking element in the locking position, and is displaced rearward from the holding position and the locking element A sleeve that is displaceable in the direction of the longitudinal axis between the disengagement position that allows the disengagement to the unlocking position, and is rotatable in the circumferential direction of the pipe holding member;
A flow path member having an outer peripheral surface on which a male screw portion is formed and screwed into the female screw portion of the pipe holding member by the male screw portion, and extending rearward from a front end opening located in the insertion space A flow path member having a flow path to perform,
A handle member attached to the pipe holding member so as to protrude radially outward from the outer peripheral surface of the pipe holding member and gripped by an operator,
By rotating the flow path member in the circumferential direction relative to the pipe holding member, the flow path member is displaced forward with respect to the pipe holding member and inserted into the insertion space. The connection end surface of the flow path member is hermetically engaged with the connection end surface of the piping member held in the insertion space by the locking element in the locked position, and the flow path of the flow path member and the piping member A joint that communicates with the flow path,
The sleeve has a notch for receiving the handle member at a rear end;
The sleeve can be displaced from the holding position to the release position while receiving the handle member in the notch when the circumferential rotation position is at an alignment position where the notch and the handle member are aligned. When the rotational position is at an inconsistent position where the notch and the handle member are not aligned, the rear end portion interferes with the handle member and is displaced from the holding position to the release position. A joint that was designed to prevent this.   The pipe holding member has a handle holding hole for slidably receiving the handle member, and the handle member is displaceable in the radial direction along the handle holding hole. Fittings.   A sliding resistance member disposed between the handle member and the handle holding hole, the handle member being positioned at an arbitrary radial position relative to the handle holding hole by a sliding resistance force of the sliding resistance member; The joint according to claim 2, wherein the joint is made stationary. Further provided on the outer peripheral surface of the flow path member is a rotational flow path connecting member that is rotatably disposed in the circumferential direction and has a flow path extending in the radial direction,
The flow path of the flow path member has an opening that opens to the outer peripheral surface of the flow path member;
The rotary flow path connecting member is disposed so as to cover the opening, and the flow path of the rotary flow path connecting member is sealed and communicated with the flow path of the flow path member with respect to the flow path member. The joint according to any one of claims 1 to 3, wherein the joint is rotated. In another position attached to the flow path member so as to penetrate the flow path member in the radial direction and extend radially outward from the outer circumferential surface of the flow path member at a position behind the rotary flow path connecting member. The joint according to claim 4, further comprising a handle member.

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