JP5421155B2 - Fluid fitting device - Google Patents

Description

  The present invention relates to a fluid pipe coupling device in which a pipe end portion of a fluid pipe is movable in its longitudinal direction.

  Conventionally, there has been an expansion joint that is connected so that the pipe end portion of the fluid pipe can move in the longitudinal direction (see, for example, Patent Document 1). As shown in FIG. 11, the joint 11 has a sliding short tube 13 slidably inserted into the main body 12. Then, one end side of the sliding short tube 13 protruding from the main body 12 becomes a pipe connecting portion 13a to which the fluid pipe 10 is connected in a water-stopped state, and the other end side positioned on the back side of the main body 12 is It became the slide part 13b which slips in a water stop state with respect to an internal peripheral surface.

JP 2009-14011 A

  By the way, in the conventional joint 11, the main body 12 and the fluid pipe 10 are connected via the sliding short pipe 13. For this reason, in order to avoid water leakage, the joint 11 has a water stop between the main body 12 and the slide portion 13b of the sliding short tube 13, and between the pipe connecting portion 13a of the sliding short tube 13 and the fluid pipe 10. The water stop of two places with the water stop of was required.

  The present invention has been made in order to solve the above-described conventional drawbacks, and an object of the present invention is to connect a pipe end portion of a fluid pipe movably with a single water stop. Another object is to provide a fluid coupling device.

In order to achieve the object, the fluid pipe coupling device according to the present invention has the following configuration. That is,
The fluid pipe coupling device according to the first aspect of the present invention includes a coupling body, a slip-out prevention body, and a water stop ring. Here, the joint body has a cylindrical receiving port into which the pipe end portion of the fluid pipe is inserted. The slip-out prevention body is immovable toward the tube end side on the outer periphery of the rear end of the tube end portion away from the tube end in the tube end portion in order to prevent the tube end portion from slipping out of the receiving port , and It is movably fitted to the tube end side . The water-stop ring is provided at the receiving port, and is in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion in the tube end portion, and the front end of the tube end portion Stop water between the receiving port. In addition, the connection end, which is the pipe end portion with the escape prevention body, is provided in the receiving port so that the connection end faces the escape prevention body so as not to come out of the reception port. A slip-out restricting section is provided to stop the movement. The joint body is provided with an entry restricting portion that faces the connection end portion and stops the movement of the connection end portion in the entry direction so that the connection end portion does not enter deeper than the receiving port. It is done. Therefore, within the range where the front end of the pipe end portion is in contact with the water blocking ring, the shaft of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port. The outlet is formed long in the axial direction so as to be movable in the central direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction. Moreover, the said entrance control part consists of a contact part contact | abutted to the end surface of the said pipe end part part, or the front end surface of the core member inserted in the pipe end part part.

According to this fluid pipe coupling device, when the pipe end portion of the fluid pipe is inserted into the receiving port of the joint body, the water stop ring provided at the receiving port causes the pipe end portion between the front portion and the receiving port. Is stopped. A retaining member is fitted on the outer periphery of the rear end of the pipe end portion of the fluid pipe, and the connecting end, which is a tube end portion with a slip-off preventing body, faces the slip-off preventing body at the receiving port. The slipping-out restricting portion is restricted from coming out of the receiving port, and the contact portion, which is an approaching restricting portion facing the connection end portion, is restricted from entering deeper than the receiving port. Therefore, the receiving end is formed long in the axial direction, and the connection restricting portion is provided at a position where the withdrawal restricting portion and the entry restricting portion (that is, the contact portion) are separated in the axial direction. It can move in the axial direction in the receiving port, and in this range of movement, the front end of the tube end portion is in contact with the water stop ring. In this way, the water stop between the receiving port and the fluid pipe is maintained by one water stop, that is, the water stop between the receiving port and the front end portion of the pipe end portion by the water stop ring, and the connection end portion, that is, the fluid is maintained. The tube end portion of the tube is movably connected to the receptacle.

Moreover, the fluid pipe coupling device according to the second aspect of the present invention includes a coupling main body, a slip-out prevention body, and a water stop ring. Here, the joint body has a cylindrical receiving port into which the pipe end portion of the fluid pipe is inserted. The slip-out prevention body is immovable toward the tube end side on the outer periphery of the rear end of the tube end portion away from the tube end in the tube end portion in order to prevent the tube end portion from slipping out of the receiving port, and It is immovably fitted on the tube end side. The water-stop ring is provided at the receiving port, and is in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion in the tube end portion, and the front end of the tube end portion Stop water between the receiving port. In addition, the connection end, which is the pipe end portion with the escape prevention body, is provided in the receiving port so that the connection end faces the escape prevention body so as not to come out of the reception port. A slip-out restricting section is provided to stop the movement. The joint body is provided with an entry restricting portion that faces the connection end portion and stops the movement of the connection end portion in the entry direction so that the connection end portion does not enter deeper than the receiving port. It is done. Therefore, within the range where the front end of the pipe end portion is in contact with the water blocking ring, the shaft of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port. The outlet is formed long in the axial direction so as to be movable in the central direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction.
According to this fluid pipe coupling device, when the pipe end portion of the fluid pipe is inserted into the receiving port of the joint body, the water stop ring provided at the receiving port causes the pipe end portion between the front portion and the receiving port. Is stopped. A retaining member is fitted on the outer periphery of the rear end of the pipe end portion of the fluid pipe, and the connecting end, which is a tube end portion with a slip-off preventing body, faces the slip-off preventing body at the receiving port. The exit restricting portion is restricted from coming out of the receiving port, and the entry restricting portion facing the connection end is restricted from entering further into the back than the receiving port. Therefore, the receiving port is formed long in the axial direction, and the connection restricting portion is provided in the axial direction in the receiving port by providing the withdrawal restricting portion and the entry restricting portion at positions separated from each other in the axial direction. In this range of movement, the front end of the pipe end portion is in contact with the water stop ring. In this way, the water stop between the receiving port and the fluid pipe is maintained by one water stop, that is, the water stop between the receiving port and the front end portion of the pipe end portion by the water stop ring, and the connection end portion, that is, the fluid is maintained. The tube end portion of the tube is movably connected to the receptacle.

According to a third aspect of the present invention, a fluid pipe coupling device includes a coupling main body, a slip-out prevention body, and a water stop ring. Here, the joint body has a cylindrical receiving port into which the pipe end portion of the fluid pipe is inserted. In order to prevent the tube end portion from slipping out of the receiving port, the slip-out preventing body is immovable at least on the outer periphery of the rear end of the tube end portion away from the tube end in the tube end portion. Fitted. The water-stop ring is provided at the receiving port, and is in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion in the tube end portion, and the front end of the tube end portion Stop water between the receiving port. In addition, the connection end, which is the pipe end portion with the escape prevention body, is provided in the receiving port so that the connection end faces the escape prevention body so as not to come out of the reception port. A slip-out restricting section is provided to stop the movement. The joint body is provided with an entry restricting portion that faces the connection end portion and stops the movement of the connection end portion in the entry direction so that the connection end portion does not enter deeper than the receiving port. It is done. Therefore, within the range where the front end of the pipe end portion is in contact with the water blocking ring, the shaft of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port. The outlet is formed long in the axial direction so as to be movable in the central direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction. In addition, the receptacle is a fixing member that abuts against a rear surface of the escape prevention body at the connection end portion that is stopped from moving in the entry direction by the entry restriction portion and stops movement of the connection end portion in the removal direction. However, it has a fixing member attaching part attached so that attachment or detachment is possible.
According to this fluid pipe coupling device, when the pipe end portion of the fluid pipe is inserted into the receiving port of the joint body, the water stop ring provided at the receiving port causes the pipe end portion between the front portion and the receiving port. Is stopped. A retaining member is fitted on the outer periphery of the rear end of the pipe end portion of the fluid pipe, and the connecting end, which is a tube end portion with a slip-off preventing body, faces the slip-off preventing body at the receiving port. The exit restricting portion is restricted from coming out of the receiving port, and the entry restricting portion facing the connection end is restricted from entering further into the back than the receiving port. Therefore, the receiving port is formed long in the axial direction, and the connection restricting portion is provided in the axial direction in the receiving port by providing the withdrawal restricting portion and the entry restricting portion at positions separated from each other in the axial direction. In this range of movement, the front end of the pipe end portion is in contact with the water stop ring. In this way, the water stop between the receiving port and the fluid pipe is maintained by one water stop, that is, the water stop between the receiving port and the front end portion of the pipe end portion by the water stop ring, and the connection end portion, that is, the fluid is maintained. The tube end portion of the tube is movably connected to the receptacle. Since the receiving port has a fixing member mounting portion, depending on whether or not the fixing member is mounted on the fixing member mounting portion, the connecting end portion, that is, the pipe end portion of the fluid pipe, It can be connected in a fixed state so as not to move in the direction, or can be connected in a state in which it can move in the axial direction.

Further, in the fluid pipe coupling device according to claim 1 or 2 , as in the fluid pipe coupling device according to the invention according to claim 4, the receiving port stops movement in the entry direction by the entry restriction portion. A fixing member attaching portion to which the fixing member that contacts the rear surface of the escape preventing body at the connected end portion and stops the movement of the connecting end portion in the withdrawal direction may be attached detachably. Thus, depending on whether or not the fixing member is attached to the fixing member mounting portion of the receiving port, the connection end portion, that is, the tube end portion of the fluid pipe is fixed to the receiving port so as not to move in the axial direction. Or can be connected while being movable in the axial direction.

Further, in the fluid pipe coupling device according to claim 2 , as in the fluid pipe coupling device according to the invention according to claim 5, the receiving port is prevented from moving in the withdrawal direction by the withdrawal restriction portion. The fixing member that contacts the front surface of the escape prevention body at the connection end and stops the movement of the connection end in the entering direction may have a fixing member mounting portion that is detachably mounted. Thus, depending on whether or not the fixing member is attached to the fixing member mounting portion of the receiving port, the connection end portion, that is, the tube end portion of the fluid pipe is fixed to the receiving port so as not to move in the axial direction. Or can be connected while being movable in the axial direction.

Moreover, in the fluid pipe coupling device according to claim 2 , as in the fluid pipe coupling device according to the invention according to claim 6, the connection port is located at the connection end located in the middle of the movement in the axial direction. A first fixing member attaching part detachably attached to a first fixing member that comes into contact with a rear surface of the escape preventing body at the part and stops the movement of the connection end part in the withdrawal direction; and A second fixing member that comes into contact with the front surface of the escape prevention body at the connection end portion that is stopped from moving in the withdrawal direction by one fixing member and is detachably attached to stop the movement of the connection end portion in the entry direction. The second fixing member attaching portion may be provided. Thus, depending on whether or not the fixing member is attached to the fixing member mounting portion of the receiving port, the connection end portion, that is, the tube end portion of the fluid pipe is fixed to the receiving port so as not to move in the axial direction. Or can be connected while being movable in the axial direction.

  Further, in the fluid pipe coupling device according to any one of claims 1 to 6, like the fluid pipe coupling device according to the invention according to claim 7, the pipe end portion is a pipe end portion thereof. It may be inserted into the receiving port in a state of the connection end portion provided with the escape prevention body.

Further, as in the fluid pipe coupling device according to the invention according to claim 8, in the fluid pipe coupling device according to claim 1 , the pipe end portion is connected to the receiving port on which the escape prevention body is mounted. May be inserted.

  Further, in the fluid pipe coupling device according to any one of claims 1 to 8, as in the fluid pipe coupling device according to the invention according to claim 9, the escape prevention body is disposed in the receiving port, It may be rotatable together with the tube end portion. Thus, the tube end portion of the fluid pipe can be rotated with respect to the receiving port, so that even when the fluid pipe is twisted as the pipe end portion moves in the axial direction. The twist can be absorbed by the rotation of the tube end portion.

In addition, the fluid pipe coupling device according to the invention of claim 10 includes a coupling body, a slip-out prevention body, and a water stop ring. Here, the joint body has a cylindrical receiving port into which the pipe end portion of the fluid pipe is inserted. In order to prevent the tube end portion from slipping out of the receiving port, the slip-out preventing body is immovable at least on the outer periphery of the rear end of the tube end portion away from the tube end in the tube end portion. Fitted. The water-stop ring is provided at the receiving port, and is in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion in the tube end portion, and the front end of the tube end portion Stop water between the receiving port. In addition, the connection end, which is the pipe end portion with the escape prevention body, is provided in the receiving port so that the connection end faces the escape prevention body so as not to come out of the reception port. A slip-out restricting section is provided to stop the movement. The joint body is provided with an entry restricting portion that faces the connection end portion and stops the movement of the connection end portion in the entry direction so that the connection end portion does not enter deeper than the receiving port. It is done. Therefore, within the range where the front end of the pipe end portion is in contact with the water blocking ring, the shaft of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port. The outlet is formed long in the axial direction so as to be movable in the central direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction. The escape prevention body includes a cylindrical outer shell and a retaining ring that is provided inside the outer shell and engages the fluid pipe, and the retaining ring is disposed in the outer shell. and turnable together with the tube end portion.
According to this fluid pipe coupling device, when the pipe end portion of the fluid pipe is inserted into the receiving port of the joint body, the water stop ring provided at the receiving port causes the pipe end portion between the front portion and the receiving port. Is stopped. A retaining member is fitted on the outer periphery of the rear end of the pipe end portion of the fluid pipe, and the connecting end, which is a tube end portion with a slip-off preventing body, faces the slip-off preventing body at the receiving port. The exit restricting portion is restricted from coming out of the receiving port, and the entry restricting portion facing the connection end is restricted from entering further into the back than the receiving port. Therefore, the receiving port is formed long in the axial direction, and the connection restricting portion is provided in the axial direction in the receiving port by providing the withdrawal restricting portion and the entry restricting portion at positions separated from each other in the axial direction. In this range of movement, the front end of the pipe end portion is in contact with the water stop ring. In this way, the water stop between the receiving port and the fluid pipe is maintained by one water stop, that is, the water stop between the receiving port and the front end portion of the pipe end portion by the water stop ring, and the connection end portion, that is, the fluid is maintained. The tube end portion of the tube is movably connected to the receptacle. The escape prevention body includes a cylindrical outer shell and a retaining ring for locking the fluid pipe, and the retaining ring is rotatable with the pipe end portion in the outer shell. . Thus, the tube end portion of the fluid pipe can be rotated with respect to the receiving port, so that even when the fluid pipe is twisted as the pipe end portion moves in the axial direction. The twist can be absorbed by the rotation of the tube end portion.

In addition, a fluid pipe coupling device according to an eleventh aspect of the present invention includes a coupling body, a slip-out prevention body, and a water stop ring. Here, the joint body has a cylindrical receiving port into which the pipe end portion of the fluid pipe is inserted. In order to prevent the tube end portion from slipping out of the receiving port, the slip-out preventing body is immovable at least on the outer periphery of the rear end of the tube end portion away from the tube end in the tube end portion. Fitted. The water-stop ring is provided at the receiving port, and is in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion in the tube end portion, and the front end of the tube end portion Stop water between the receiving port. In addition, the connection end, which is the pipe end portion with the escape prevention body, is provided in the receiving port so that the connection end faces the escape prevention body so as not to come out of the reception port. A slip-out restricting section is provided to stop the movement. The joint body is provided with an entry restricting portion that faces the connection end portion and stops the movement of the connection end portion in the entry direction so that the connection end portion does not enter deeper than the receiving port. It is done. Therefore, within the range where the front end of the pipe end portion is in contact with the water blocking ring, the shaft of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port. The outlet is formed long in the axial direction so as to be movable in the central direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction. The escape prevention body includes a retaining ring that is provided inside the receiving port and locks the fluid pipe, and the retaining ring can rotate with the tube end portion in the receiving port. It has become .
According to this fluid pipe coupling device, when the pipe end portion of the fluid pipe is inserted into the receiving port of the joint body, the water stop ring provided at the receiving port causes the pipe end portion between the front portion and the receiving port. Is stopped. A retaining member is fitted on the outer periphery of the rear end of the pipe end portion of the fluid pipe, and the connecting end, which is a tube end portion with a slip-off preventing body, faces the slip-off preventing body at the receiving port. The exit restricting portion is restricted from coming out of the receiving port, and the entry restricting portion facing the connection end is restricted from entering further into the back than the receiving port. Therefore, the receiving port is formed long in the axial direction, and the connection restricting portion is provided in the axial direction in the receiving port by providing the withdrawal restricting portion and the entry restricting portion at positions separated from each other in the axial direction. In this range of movement, the front end of the pipe end portion is in contact with the water stop ring. In this way, the water stop between the receiving port and the fluid pipe is maintained by one water stop, that is, the water stop between the receiving port and the front end portion of the pipe end portion by the water stop ring, and the connection end portion, that is, the fluid is maintained. The tube end portion of the tube is movably connected to the receptacle. The escape prevention body includes a retaining ring that locks the fluid pipe, and the retaining ring can rotate together with the pipe end portion in the receiving port. Thus, the tube end portion of the fluid pipe can be rotated with respect to the receiving port, so that even when the fluid pipe is twisted as the pipe end portion moves in the axial direction. The twist can be absorbed by the rotation of the tube end portion.

  According to the fluid pipe coupling device of the present invention, the water stop ring provided at the receiving port of the joint body is brought into close contact with the front end portion of the pipe end portion of the fluid pipe, and the escape restriction portion and the entry restriction portion are received. By providing at a position separated from the mouth, the pipe end portion of the fluid pipe can be movably connected to the receiving port by one stop of water stoppage between the receiving port and the front end portion of the pipe end portion. .

It is sectional drawing of 1st embodiment of this invention. Similarly, it is an exploded perspective view. Similarly, it is sectional drawing of a coupling main body. Similarly, it is sectional drawing which shows the connection end part of a fluid pipe | tube. Similarly, it is sectional drawing which shows the coupling main body with which the fall-out prevention body was mounted | worn. Similarly, it is sectional drawing which shows the attachment state of a fixing member. It is sectional drawing of 2nd embodiment of this invention. Similarly, it is sectional drawing which shows the connection end part of a fluid pipe | tube. FIG. 2 is a view corresponding to FIG. 1 of another embodiment of the present invention. Similarly, it is a figure equivalent to FIG. It is sectional drawing which shows the conventional coupling.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the fluid pipe coupling apparatus which concerns on this invention is demonstrated based on drawing.

  1 to 6 show a first embodiment of the present invention. Reference numeral 1 in the figure denotes a fluid pipe, in particular, a fluid pipe as a piping material, and is made of, for example, a synthetic resin pipe such as cross-linked polyethylene or polybutene. 2 is a fluid pipe coupling device to which the fluid pipe 1 is connected.

  The fluid pipe joint device 2 includes a joint body 3 having a cylindrical receiving port 3 a into which a pipe end portion 1 a of the fluid pipe 1 is inserted, a slip-out preventing body 4, and a water stop ring 5. Here, in order to prevent the tube end portion 1a from slipping out of the receiving port 3a, the slip-out preventing body 4 is disposed on the outer periphery of the tube end portion rear portion 1b away from the tube end in the tube end portion 1a. It is fitted at least to the tube end side so as not to move (in the illustrated embodiment, it is fitted so as not to move to the tube end side and to the opposite tube end side). And the escape prevention body 4 becomes rotatable with the pipe end part 1a in the receptacle 3a. The water stop ring 5 is provided in the receiving port 3a and is in close contact with the tube end portion front portion 1c closer to the tube end than the tube end portion rear portion 1b in the tube end portion 1a. Water is stopped between the portion 1c and the receiving port 3a.

  Further, the connection end 1x, which is the pipe end portion 1a with the escape prevention body 4, is not attached to the reception opening 3a so that the connection end 1x does not come out of the reception opening 3a. A slip-out restricting portion 3b that stops the movement of the connecting end 1x in the slip-out direction W1 is provided so as to face the rear surface. The joint body 3 has an entry restricting portion that faces the connection end 1x and stops the movement in the entry direction W2 of the connection end 1x so that the connection end 1x does not enter deeper than the receiving port 3a. 3c is provided. In the illustrated embodiment, the entry restricting portion 3c includes a contact portion that contacts the distal end surface of the core member 6 inserted into the tube end portion 1a.

  Therefore, within the range in which the pipe end portion front portion 1c is in contact with the water stop ring 5, the connection end 1x includes the outlet direction W1 and the entry direction W2 in the opposite directions in the reception port 3a. The receiving port 3a is formed long in the axial direction W so as to be movable in the axial direction W of 3a, and the escape restricting portion 3b and the entry restricting portion 3c are separated from each other in the axial direction W. Is provided. That is, in the fluid pipe coupling device 2, a load in the longitudinal direction is applied to the connection end 1 x due to a change in temperature after the construction, a change in temperature of the fluid flowing in the fluid pipe 1, or the like. Even in such a case, the connection end 1x moves in the axial direction W of the receiving port 3a, which is also the longitudinal direction thereof, so that the load is reduced.

  Here, when the escape prevention body 4 is fitted on the outer periphery of the tube end portion rear portion 1b so as not to move toward the tube end and to move toward the opposite tube end, the connection end of the fluid tube 1 is connected. When 1x moves in the entrance direction W2 in the receiving port 3a, not only the tube end portion 1a moves while the escape prevention body 4 remains, but the escape prevention body 4 is integrated with the pipe end portion 1a. (That is, in the state of the connection end 1x). That is, the escape prevention body 4 and the inner peripheral surface of the receiving port 3a are formed so as not to have much resistance to the movement of the escape prevention body 4.

  Further, the receiving port 3a has a fixing member mounting portion 3d. The fixing member mounting portion 3d abuts against the rear surface of the escape preventing body 4 at the connection end 1x that is stopped from moving in the entry direction W2 by the entry restricting portion 3c, and moves in the withdrawal direction W1 of the connection end 1x. A fixing member 7 is attached to be removable. That is, when the fixing member 7 is attached to the fixing member attaching portion 3d at the position where the connecting end portion 1x is moved to the back end of the receiving port 3a that is in contact with the entry restricting portion 3c, the connecting member 1x is connected by the fixing member 7. The movement in the exit direction W1 is stopped. That is, when the fixing member 7 is attached at a position where the connection end 1x is moved to the back end of the receiving port 3a, the connection end 1x is fixed so as not to move in the axial direction W with respect to the receiving port 3a. .

  Specifically, the joint body 3 is formed in a cylindrical shape so that fluid can pass through, and one end side of the joint body 3 serves as the receiving port 3a. Inside the joint body 3, the receiving port 3 a portion is a receiving hole 3 e in which the pipe end portion 1 a of the fluid pipe 1 and the escape preventing body 4 (that is, the connecting end portion 1 x) are received. The entry restricting portion 3c made of, for example, a protrusion protruding from the inner peripheral surface is provided at the back end of the hole 3e. The rear side of the accommodation hole 3e is a small diameter hole 3f into which the pipe end portion front portion 1c of the fluid pipe 1 is fitted, and the mouth side of the accommodation hole 3e is a large diameter hole 3g into which the escape prevention body 4 is fitted. It has become. And the groove | channel 3h in which the said water stop ring 5 fits is formed in the surrounding surface of the small diameter hole 3f.

  In addition, the receiving port 3a is provided with a restriction member insertion hole 3i into which the withdrawal restriction member 301 as the withdrawal restriction portion 3b is inserted. The restricting member insertion hole 3i is opened on the outer periphery of the receiving port 3a (specifically, the convex portion 3j projecting at four locations on the outer periphery), and the accommodating hole 3e (specifically, a large-diameter hole). 3g) is opened across. The receiving port 3a is provided with a regulating member latching portion 3k that latches the withdrawal regulating member 301. The restricting member hooking portion 3k is provided so as to protrude from the outer periphery of the receiving port 3a, and the leading end of the restricting member hooking portion 3k extends so as to engage with the slip-out restricting member 301. In the illustrated embodiment, the withdrawal restriction member 301 as the withdrawal restriction portion 3b is detachably attached to a restriction member attachment portion 3r configured by the restriction member insertion hole 3i and the restriction member hooking portion 3k. It may be attached so that it cannot be removed.

  Furthermore, the receiving port 3a is provided with a fixing member insertion hole 3n into which the fixing member 7 is inserted. The fixing member insertion hole 3n is located farther from the tip of the receiving port 3a than the restricting member insertion hole 3i, but the form thereof is the same, and an opening is formed in the outer periphery of the receiving port 3a (in detail, the outer periphery thereof). And is opened so as to cross the housing hole 3e (specifically, the large diameter hole 3g). The receiving port 3a is provided with a fixing member hooking portion 3q for hooking the fixing member 7. The fixing member hooking portion 3q is protruded from the outer periphery of the receiving port 3a in the same manner as the restricting member hooking portion 3k, and protrudes so that the tip end of the fixing member hooking portion 3q engages with the fixing member 7. Accordingly, the fixing member insertion hole 3n and the fixing member hooking portion 3q serve as the fixing member attaching portion 3d.

  The escape prevention body 4 includes a cylindrical outer shell 4 a and a retaining ring 4 b that is provided inside the outer shell 4 a and engages the fluid pipe 1. Here, the retaining ring 4 b has a plurality of locking claws 4 c that extend inward to lock the fluid pipe 1. Specifically, the retaining ring 4b is made of, for example, a metal plate material such as a stainless steel plate, and the locking claw 4c is elastically deformable and inwardly inclined so as to be inclined in the entry direction W2. It is extended toward. Therefore, as described above, the slip-out prevention body 4 cannot move to the tube end side and can move to the opposite tube end side on the outer periphery of the tube end portion rear portion 1b depending on the inclination direction of the locking claw 4c. Will be fitted. The slip-out prevention body 4 includes a plurality of retaining rings 4b (three in the illustrated embodiment), and is provided inside the outer shell 4a and is an end ring positioned at each end of the outer shell 4a. 4d and an intermediate ring 4f located in the middle. Therefore, the retaining ring 4b is sandwiched between the end ring 4d and the intermediate ring 4f and between the intermediate rings 4f and 4f.

  By the way, the escape prevention body 4 is formed separately from the fluid pipe 1 (specifically, the pipe end portion 1a). Therefore, the escape prevention body 4 in the fluid pipe coupling device 2 is not received. Whether it is a slip-out prevention body attached to the port 3a, or a slip-out prevention body before being attached, or is a slip-out prevention body into which the pipe end portion 1a of the fluid pipe 1 is inserted, or It does not matter whether it is a slip-out prevention body before being inserted. Moreover, although the coupling main body 3 and the slip-out prevention body 4 may be sold as a set, they may be sold separately.

  The withdrawal regulating member 301 is made of, for example, a metal wire, and is formed in a substantially U shape as shown in FIG. The slip-out restricting member 301 is configured such that the facing pieces 3x and 3x facing each other are inserted into the restricting member insertion holes 3i and 3i provided in the receiving port 3a so that the fluid pipe 1 is sandwiched therebetween, Opposite (see FIG. 1). At this time, the intermediate piece 3y that connects the opposing pieces 3x and 3x in the withdrawal regulating member 301 is hooked on the regulating member latching portion 3k provided in the receiving port 3a, and thus the withdrawal regulating member 301 is stopped by the receiving port 3a. It is done.

  As shown in FIG. 2, the fixing member 7 is made of the same material and the same shape, that is, a common member, with the withdrawal regulating member 301. This fixing member 7 is inserted into the fixing member insertion holes 3n and 3n provided in the receiving port 3a so that the opposing pieces 7x and 7x facing each other sandwich the fluid pipe 1 so as to contact the rear surface of the escape prevention body 4. (Refer to FIG. 6). At this time, the intermediate piece 7y connecting the opposing pieces 7x and 7x in the fixing member 7 is hooked on the fixing member hooking portion 3q provided in the receiving port 3a, and thus the fixing member 7 is stopped by the receiving port 3a. In the case where the withdrawal restricting member 301 is detachably attached to the restricting member attaching portion 3r, the fixing member 7 is made of a member common to the withdrawal restricting member 301. Therefore, when the fixing member 7 is used. In addition to inserting the new fixing member 7 into the fixing member insertion hole 3n while leaving the withdrawal regulating member 301 in the receiving port 3a, the withdrawal regulating member 301 is removed from the regulating member insertion hole 3i, and the withdrawal regulating member is removed. 301 may be used as the fixing member 7 and inserted into the fixing member insertion hole 3n.

  Next, the function and effect of the fluid pipe coupling device 2 in the first embodiment will be described. In this fluid pipe coupling device 2, the pipe end portion 1a of the fluid pipe 1 is fitted in the state of the connection end 1x in which the pipe end portion 1a is provided with the dropout prevention body 4, that is, the dropout prevention body 4 is fitted. In this state, it may be inserted into the receiving port 3a of the joint body 3 (see FIG. 2), or may be inserted into the receiving port 3a in which the escape prevention body 4 is inserted (see FIG. 5). . In the former case, the connection end 1x is inserted into the receiving port 3a in a state in which the withdrawal restriction member 301 is removed from the restriction member insertion hole 3i, and then the withdrawal restriction member 301 is inserted into the restriction member insertion hole 3i. Inserted. In the latter case, the escape prevention body 4 is attached to the receiving port 3a in advance, and the withdrawal restriction member 301 is inserted into the restriction member insertion hole 3i. When the pipe end portion 1a of the fluid pipe 1 is inserted into the receiving port 3a, the pipe end portion 1a penetrates the escape preventing body 4 in the receiving port 3a, thereby preventing the withdrawal. The body 4 is fitted on the outer periphery of the tube end portion 1a.

  As described above, when the pipe end portion 1a of the fluid pipe 1 is inserted into the receiving port 3a of the joint body 3, the pipe end portion front portion 1c and the receiving port are formed by the water stop ring 5 provided in the receiving port 3a. Water is stopped between 3a. A retaining member 4 is fitted on the outer periphery of the rear end 1b of the tube end portion of the fluid tube 1, and the connecting end 1x, which is the tube end portion 1a with the slip-out preventing member 4, is connected to the receiving port 3a. , The escape restricting member 301 (exit restricting portion 3b) facing the exit preventing body 4 is restricted from coming out of the receiving port 3a, and the entrance restricting portion 3c facing the connection end 1x is located behind the receiving port 3a. Is restricted from entering. Therefore, the receiving port 3a is formed long in the axial direction W, and the escape restricting member 301 (exit restricting portion 3b) and the entry restricting portion 3c are provided at positions separated from each other in the axial direction W. The end portion 1x can move in the axial direction W within the receiving port 3a, and the tube end portion front portion 1c is in contact with the water stop ring 5 in the range of this movement. That is, the pipe end portion front portion 1c only comes into contact with the water stop ring 5 even when the connection end portion 1x is positioned on the withdrawal side and the withdrawal prevention body 4 comes into contact with the withdrawal restriction member 301 (the withdrawal restriction portion 3b). Has a length of In this way, the water stop between the receiving port 3a and the fluid pipe 1 is maintained by one water stop, that is, the water stop between the receiving port 3a and the pipe end portion front portion 1c by the water stopping ring 5. The portion 1x, that is, the tube end portion 1a of the fluid tube 1 is movably connected to the receiving port 3a.

  That is, in the fluid pipe coupling device 2, the water stop ring 5 provided at the receiving port 3 a of the joint body 3 is brought into close contact with the pipe end portion front part 1 c of the fluid pipe 1 and the withdrawal restricting member 301. By providing the (rejection restricting portion 3b) and the entry restricting portion 3c at a position separated from the receiving port 3a, the water pipe 1 can be stopped by one stop of water at the receiving port and the front end of the tube end portion. The pipe end portion 1a can be movably connected to the receiving port 3a.

  The receiving port 3a has a fixing member attaching portion 3d. Depending on whether or not the fixing member 7 is attached to the fixing member attaching portion 3d, the connection end 1x, that is, the tube end portion of the fluid pipe 1 is determined. 1a can be connected to the receiving port 3a in a fixed state so as not to move in the axial direction W, or can be connected in a movable state in the axial direction W, and these can be used properly depending on the situation. be able to.

  Further, the escape prevention body 4 is rotatable together with the tube end portion 1a in the receiving port 3a. Thus, the tube end portion 1a (specifically, the connection end portion 1x) of the fluid pipe 1 can be rotated with respect to the receiving port 3a, so that the tube end portion 1a (connection end portion 1x) of the fluid tube 1 can be rotated. Even when the fluid pipe 1 is twisted with the movement in the axial direction W, the twist can be absorbed by the rotation of the pipe end portion 1a (connection end portion 1x).

  7 to 8 show a second embodiment of the present invention. The fluid pipe coupling device 2 of this embodiment is different from the first embodiment in the structure of the slip-out prevention body 4, but the other parts are the same, and the same parts are denoted by the same reference numerals hereinafter. The different parts will be mainly described.

  In the fluid pipe coupling device 2, the escape prevention body 4 is fitted on the outer periphery of the pipe end portion rear part 1 b of the fluid pipe 1 so as not to move toward the pipe end and to move away from the opposite pipe end. The escape prevention body 4 can be rotated together with the pipe end portion 1a in the receiving port 3a.

  Specifically, the escape prevention body 4 includes a split ring 4p and a main body ring 4q. The split ring 4p is formed in a C-shaped cross section in which one portion in the circumferential direction of the cylinder is divided, and is fitted on the outer periphery of the fluid pipe 1. And the nail | claw 4r engaged so that it may bite into the fluid pipe | tube 1 is provided in the internal peripheral surface of this split ring 4p. Further, the outer peripheral surface of the split ring 4p is a tapered surface that is inclined so that its diameter increases toward the distal end side of the fluid pipe 1. On the other hand, the main body ring 4q is fitted on the outer periphery of the split ring 4p, and reduces the diameter of the split ring 4p so that the split ring 4p press-contacts the fluid pipe 1. The main body ring 4q has a cylindrical shape, and the inner peripheral surface thereof is a tapered surface that is inclined so as to become larger in diameter toward the tip end side of the fluid pipe 1 like the outer peripheral surface of the split ring 4p. .

  Next, the function and effect of the fluid pipe coupling device 2 in the second embodiment will be described. In this fluid pipe coupling device 2, the pipe end portion 1a of the fluid pipe 1 is fitted in the state of the connection end 1x in which the pipe end portion 1a is provided with the dropout prevention body 4, that is, the dropout prevention body 4 is fitted. In this state (see FIG. 8), the joint body 3 is inserted into the receiving port 3a. That is, the connection end 1x is inserted into the receiving port 3a in a state in which the withdrawal restriction member 301 is removed from the restriction member insertion hole 3i, and then the withdrawal restriction member 301 is inserted into the restriction member insertion hole 3i. . Other functions and effects are the same as in the first implementation.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the entry restricting portion 3c is composed of an abutting portion that abuts against the distal end surface of the core member 6 inserted into the tube end portion 1a of the fluid pipe 1, but the distal end of the core member 6 is the tube end portion. When it does not protrude from 1a or when the core member 6 is not provided, the entry restricting portion 3c includes a contact portion that contacts the end surface of the tube end portion 1a. Further, in the second embodiment, the entry restricting portion 3 c may further comprise an abutting portion that abuts against the front surface of the escape preventing body 4.

  Further, the withdrawal restricting portion 3b may be made of, for example, a nut member having a hole through which the fluid pipe 1 passes, for example, a cap nut, instead of the withdrawal restricting member 301 inserted into the restricting member insertion hole 3i. The cap nut is provided with an insertion portion to be inserted into the receiving port 3a (specifically, between the inner peripheral surface of the receiving port 3a and the outer peripheral surface of the fluid pipe 1). You may oppose the escape prevention body 4. FIG.

  Furthermore, instead of the withdrawal restricting member 301, as shown in FIGS. 9 and 10, a dual-purpose member 8 that is integrally provided with both the withdrawal restricting portion 3b and the fixing member 7 may be used. The dual-purpose member 8 is formed in a cylindrical shape and has a flange portion 8a at an intermediate position thereof. And the 1st insertion part 8b which protrudes from the one side of the collar part 8a, and is inserted in the receiving port 3a (specifically between the inner peripheral surface of the receiving port 3a, and the outer peripheral surface of the fluid pipe | tube 1) is provided. Then, the leading end of the connecting end portion 1x stops the movement in the pulling-out direction W1 with the tip of the pulling-out restricting portion 3b facing the pull-out preventing body 4 (specifically, the rear surface of the pull-out preventing body 4) (see FIG. 9). ). On the other hand, a second insertion portion 8c that protrudes from the other side of the flange portion 8a and is inserted into the receiving port 3a (specifically, between the inner peripheral surface of the receiving port 3a and the outer peripheral surface of the fluid pipe 1) The fixing member 7 has its tip abutted against the rear surface of the escape preventing body 4 at the connection end 1x whose movement in the entry direction W2 is stopped by the entry restricting portion 3c, and the exit direction W1 of the connection end 1x. Is stopped (see FIG. 10). Here, male screws 8d and 8e are formed on the outer peripheral surfaces of the first insertion portion 8b and the second insertion portion 8c, and the male screws 8d and 8e are screwed on the inner peripheral surface of the receiving port 3a. A mating female screw 3z is formed. Thus, the dual-purpose member 8 is detachably attached to the receiving port 3a when either side (that is, the first insertion portion 8b or the second insertion portion 8c) is selected and screwed into the receiving port 3a. It is done. That is, by forming the second insertion portion 8c longer than the first insertion portion 8b of the dual-purpose member 8 and changing the direction of the single dual-purpose member 8, the connection end 1x, that is, the fluid pipe 1 The tube end portion 1a can be connected in a state where it can be moved in the axial direction W, or can be connected in a state where it is fixed so as not to move in the axial direction W. In this case, a fixing member 7 is prepared separately. There is no need to do.

  Moreover, although the fixing member attaching part 3d is provided in the receiving port 3a so that it may be with respect to the connection end part 1x which moved to the back end of the receiving port 3a, in 2nd Embodiment, other A fixing member attaching portion may be provided so as to be connected to the connection end portion 1x. In other words, the receiving port 3a is in contact with the front surface of the slip-out prevention body 4 at the connection end 1x that is stopped from moving in the pull-out direction W1 by the slip-out restricting portion 3b and stops the movement of the connection end 1x in the entry direction W2. However, you may have a fixing member attaching part attached so that attachment or detachment is possible. In addition, the receiving port 3a is in contact with the rear surface of the disconnection preventing body 4 at the connection end 1x located in the middle of the movement of the receiving port 3a in the axial direction W so that the connection end 1x extends in the removal direction W1. The first fixing member that stops the movement has a first fixing member mounting portion that is detachably attached, and the escape preventing body 4 at the connection end 1x that is prevented from moving in the withdrawal direction W1 by the first fixing member. A second fixing member attaching portion to which the second fixing member that comes into contact with the front surface and stops the movement of the connecting end portion 1x in the entering direction W2 may be attached detachably.

  Further, these fixing member attaching portions 3d and the first and second fixing member attaching portions may not be provided if not necessary.

  Further, the escape prevention body 4 is rotatable together with the tube end portion 1a in the receiving port 3a. As a method for enabling the tube end portion 1a to be rotated in the receiving port 3a, the following method is used. Such a configuration may be adopted. That is, the escape prevention body includes a cylindrical outer shell and a retaining ring that is provided inside the outer shell and engages the fluid pipe 1, and the retaining ring is disposed inside the outer shell. The end portion 1a may be rotatable together. In addition, the escape prevention body includes a retaining ring that is provided inside the receiving port 3a and locks the fluid pipe 1, and the retaining ring together with the tube end portion 1a in the receiving port 3a. It may be rotatable.

  In addition, one water stop ring 5 is used for water stop between the receiving port 3a and the pipe end portion 1a, and the water stop ring 5 is arranged in the axial direction W of the receiving port 3a. Two or more may be used. When a plurality of the water stop rings 5 are used in this way, when the connection end 1x is located on the withdrawal side and the withdrawal prevention body 4 comes into contact with the withdrawal restriction member 301 (the withdrawal restriction portion 3b), That is, when the connection end 1x moves to the maximum in the exit direction W1, the tube end portion front portion 1c has a length that is at least in contact with the water stop ring 5 on the side closest to the mouth of the receiving port 3a. Just have it.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 1a Pipe end part 1b Pipe end part rear part 1c Pipe end part front part 1x Connection end part 2 Fluid pipe joint apparatus 3 Joint main body 3a Receptor 3b Pull-out restricting part 3c Entrance restricting part 3d Fixing member attaching part 4 Pull-out prevention body 5 Water stop ring 6 Core member 7 Fixing member W1 Pull-out direction W2 Entrance direction W Axial direction

Claims (11)

A joint body having a cylindrical receptacle into which a pipe end portion of the fluid pipe is inserted;
In order to prevent the tube end portion from slipping out of the receiving port, the tube end portion cannot be moved to the tube end side on the outer periphery of the rear portion of the tube end portion away from the tube end , and the tube end side is opposite to the tube end side. A slip-out prevention body that is movably fitted to the
Provided at the receiving port, in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion of the tube end portion, between the front end of the tube end portion and the receiving port With a water stop ring,
The connection end, which is the pipe end portion with the escape prevention body, is moved in the withdrawal direction of the connection end so as to face the withdrawal prevention body so that the connection end is not escaped from the reception opening. The exit control part is established,
The joint body is provided with an entry restricting portion that faces the connection end portion and stops movement in the entry direction of the connection end portion so that the connection end portion does not enter deeper than the receiving port, And,
In the range where the front end of the pipe end portion is in contact with the water stop ring, the axial direction of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port The outlet is formed long in the axial direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction .
The said entry control part is a fluid pipe joint apparatus which consists of an abutting part contact | abutted to the end surface of the said pipe end part part, or the front end surface of the core member inserted in the pipe end part part . A joint body having a cylindrical receptacle into which a pipe end portion of the fluid pipe is inserted;
In order to prevent the tube end portion from slipping out of the receiving port, the tube end portion cannot be moved to the tube end side on the outer periphery of the rear portion of the tube end portion away from the tube end, and the tube end side is opposite to the tube end side. A slip-off prevention body fitted immovably to the
Provided at the receiving port, in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion of the tube end portion, between the front end of the tube end portion and the receiving port With a water stop ring,
The connection end, which is the pipe end portion with the escape prevention body, is moved in the withdrawal direction of the connection end so as to face the withdrawal prevention body so that the connection end is not escaped from the reception opening. The exit control part is established,
The joint body is provided with an entry restricting portion that faces the connection end portion and stops movement in the entry direction of the connection end portion so that the connection end portion does not enter deeper than the receiving port, And,
In the range where the front end of the pipe end portion is in contact with the water stop ring, the axial direction of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port The outlet is formed long in the axial direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction. . A joint body having a cylindrical receptacle into which a pipe end portion of the fluid pipe is inserted;
In order to prevent the tube end portion from slipping out from the receiving port, the tube end portion is fitted on the outer periphery of the rear portion of the tube end portion away from the tube end so as to be immovable at least on the tube end side. Body,
Provided at the receiving port, in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion of the tube end portion, between the front end of the tube end portion and the receiving port With a water stop ring,
The connection end, which is the pipe end portion with the escape prevention body, is moved in the withdrawal direction of the connection end so as to face the withdrawal prevention body so that the connection end is not escaped from the reception opening. The exit control part is established,
The joint body is provided with an entry restricting portion that faces the connection end portion and stops movement in the entry direction of the connection end portion so that the connection end portion does not enter deeper than the receiving port, And,
In the range where the front end of the pipe end portion is in contact with the water stop ring, the axial direction of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port The outlet is formed long in the axial direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction.
A fixing member that stops the movement of the connection end in the withdrawal direction by contacting the rear surface of the escape prevention body at the connection end that is stopped from moving in the entry direction by the entry restriction portion; A fluid pipe coupling device having a fixing member mounting portion that is detachably mounted . A fixing member that stops the movement of the connection end in the withdrawal direction by contacting the rear surface of the escape prevention body at the connection end that is stopped from moving in the entry direction by the entry restriction portion; detachably mounted, and having a fixing member mounting part, a fluid pipe coupling device according to claim 1 or 2. A fixing member that stops the movement of the connection end in the entry direction by contacting the front surface of the escape prevention body at the connection end that is stopped from moving in the withdrawal direction by the withdrawal restriction portion; The fluid pipe coupling device according to claim 2 , further comprising a fixing member mounting portion that is detachably mounted. A first fixing member that contacts the rear surface of the escape prevention body at the connection end located in the middle of the axial movement and stops the movement of the connection end in the withdrawal direction is attached to and detached from the receptacle. The connection end is in contact with the front surface of the escape prevention body at the connection end portion that has a first fixing member attachment portion that can be attached, and is stopped from moving in the withdrawal direction by the first fixation member. The fluid pipe coupling device according to claim 2 , further comprising a second fixing member attaching portion to which the second fixing member that stops the movement of the portion in the entering direction is detachably attached.   The tube end portion is inserted into the receiving port in a state of the connection end portion provided with the escape prevention body at the tube end portion. 2. The fluid pipe coupling device according to item 1. The fluid pipe coupling device according to claim 1 , wherein the pipe end portion is inserted into the receiving port on which the escape prevention body is mounted.   The fluid pipe coupling device according to any one of claims 1 to 8, wherein the escape prevention body is rotatable together with the pipe end portion in the receiving port. A joint body having a cylindrical receptacle into which a pipe end portion of the fluid pipe is inserted;
In order to prevent the tube end portion from slipping out from the receiving port, the tube end portion is fitted on the outer periphery of the rear portion of the tube end portion away from the tube end so as to be immovable at least on the tube end side. Body,
Provided at the receiving port, in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion of the tube end portion, between the front end of the tube end portion and the receiving port With a water stop ring,
The connection end, which is the pipe end portion with the escape prevention body, is moved in the withdrawal direction of the connection end so as to face the withdrawal prevention body so that the connection end is not escaped from the reception opening. The exit control part is established,
The joint body is provided with an entry restricting portion that faces the connection end portion and stops movement in the entry direction of the connection end portion so that the connection end portion does not enter deeper than the receiving port, And,
In the range where the front end of the pipe end portion is in contact with the water stop ring, the axial direction of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port The outlet is formed long in the axial direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction.
The escape prevention body includes a cylindrical outer shell and a retaining ring that is provided inside the outer shell and engages the fluid pipe, and the retaining ring is disposed in the outer shell and the tube. with end portions that are turnable, the flow body fitting device. A joint body having a cylindrical receptacle into which a pipe end portion of the fluid pipe is inserted;
In order to prevent the tube end portion from slipping out from the receiving port, the tube end portion is fitted on the outer periphery of the rear portion of the tube end portion away from the tube end so as to be immovable at least on the tube end side. Body,
Provided at the receiving port, in close contact with the front end of the tube end portion closer to the tube end than the rear end of the tube end portion of the tube end portion, between the front end of the tube end portion and the receiving port With a water stop ring,
The connection end, which is the pipe end portion with the escape prevention body, is moved in the withdrawal direction of the connection end so as to face the withdrawal prevention body so that the connection end is not escaped from the reception opening. The exit control part is established,
The joint body is provided with an entry restricting portion that faces the connection end portion and stops movement in the entry direction of the connection end portion so that the connection end portion does not enter deeper than the receiving port, And,
In the range where the front end of the pipe end portion is in contact with the water stop ring, the axial direction of the receiving port including the exit direction and the entering direction in the direction in which the connecting end portion is contradictory in the receiving port The outlet is formed long in the axial direction, and the withdrawal restricting portion and the entry restricting portion are provided at positions separated from each other in the axial direction.
The escape prevention body includes a retaining ring that is provided inside the receiving port and locks the fluid pipe, and the retaining ring can be rotated together with the tube end portion in the receiving port. Tei Ru, flow body fitting device.

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