JP5162162B2 - Fitting pipe - Google Patents

Description

  The present invention relates to a joint pipe including a cylindrical portion whose one end is connected to a pipe, and a tank connected to the other end side of the cylindrical portion.

  2. Description of the Related Art Conventionally, a liquid feeding device is known in which one end of a joint pipe is connected to a tank, the other end of the joint pipe is connected to a pipe, and liquid in the tank is sent from the pipe to the server through the joint pipe. In such a liquid feeding device, it is necessary to periodically clean the piping when supplying a liquid such as a beverage.

As a device with a mechanism for cleaning the piping, for example, a filling cylinder which can be filled from a storage tank through a filling line which can be closed and which can be discharged through a compounding line by means of a movable piston. The provided arrangement is disclosed. In this device, the filling device is configured to rotate around the axis of the filling cylinder together with the storage tank, and in the first rotational position where the storage tank takes the upper position, the filling line is opened, and the storage tank is The filling line is closed in the second rotational position, which is the lower position. And in the closed filling pipeline, it is comprised so that a compounding agent may not reach a filling cylinder (refer patent document 1).
JP-A-6-86963

  However, the apparatus described in Patent Document 1 has a problem that the configuration of the filling cylinder is complicated and the cost increases. Moreover, it is difficult to process the components of the filling cylinder.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a joint pipe that allows easy processing of components of the joint pipe and enables mass production.

In order to solve the above-described problem, the invention according to claim 1 is provided with a cylindrical part having one end connected to a pipe and having a flow path, and the other end of the cylindrical part, and a tank connected or interposed. A joint pipe provided with a connecting portion connected via the connecting portion, and an on-off valve provided between the connecting portion and the tubular portion, the tube formed on the inner peripheral side of the tubular portion A threaded portion side threaded portion, a connecting portion side threaded portion formed on the outer peripheral side of the connecting portion and screwed to the tubular portion side threaded portion, an inner periphery of the tubular portion, and an end of the connecting portion Between the cylindrical portion side threaded portion and the connecting portion side threaded portion, and the cylindrical portion side on the outer peripheral side of the connecting portion. A wall surface that is formed in a direction in which the screw portion is screwed and protrudes in a radial direction from the connection portion-side screw portion; and formed in the tubular portion; A contact surface that is crimped to the wall surface when the connection portion side thread portion is screwed together, and the inner diameter of the cylindrical portion is made larger than the inner diameter of the connection portion at a position adjacent to the recess. A step portion is formed, and the on-off valve includes a rubber plate having an outer peripheral portion sandwiched between the recesses, and forms a slit that is cut in a circular shape leaving a part in the rubber plate, A valve body that contacts the stepped portion and closes the flow path, and a part of the valve body is a support member that rotatably supports the end of the valve body toward the tubular portion side, from the connection portion side. The valve body is rotated by fluid flowing to the cylindrical portion side.

  According to invention of Claim 1, piping is connected to the end of a cylindrical part, a tank is connected to the connection part provided in the other end of the cylindrical part, or an interposition member is connected to a connection part. The tank is connected. A cylindrical part side threaded part is formed on the inner periphery of the cylindrical part, and by screwing and tightening the connecting part side threaded part and the cylindrical part side threaded part formed on the outer periphery of the connecting part, A connecting portion is attached to the cylindrical portion. At that time, a recess is formed between the inner periphery of the cylindrical part and the end of the connection part, and when the cylindrical part side screw part and the connection part side screw part are screwed together, the opening / closing valve is in the recess. The on-off valve is fixed by being pinched. In addition, in the direction in which the cylindrical portion side threaded portion on the outer periphery of the connecting portion is screwed, a wall surface protruding in the radial direction from the connecting portion side threaded portion is formed, and the cylindrical portion side threaded portion and the connecting portion side are formed. When the threaded portion is screwed and tightened, the wall surface is crimped to the contact surface formed in the tubular portion.

In this joint pipe, the cylindrical part side threaded part is formed on the inner periphery of the cylindrical part, and the connecting part side threaded part is formed on the outer periphery of the connecting part, and the cylindrical part side threaded part, the connecting part side threaded part, Since the cylindrical part and the connecting part are fixed by tightening, the processing of the cylindrical part and the connecting part is easy, and mass production becomes possible. In addition, when the cylindrical portion side screw portion and the connection portion side screw portion are tightened, the wall surface of the connection portion is crimped to the contact surface of the cylindrical portion, so that the wall surface of the connection portion and the contact surface of the cylindrical portion are Due to the frictional resistance, the tubular part side thread part and the connection part side thread part are suppressed from loosening. For this reason, an on-off valve can be hold | maintained in the recessed part between the inner periphery of a cylindrical part and the edge part of a connection part over a long period of time.
Further, a step portion is formed at a position adjacent to the concave portion with the inner diameter of the cylindrical portion larger than the inner diameter of the connecting portion, and a rubber plate constituting the on-off valve is fixed to the concave portion. The on-off valve forms a slit that is cut in a circular shape, leaving a part on the rubber plate, and the circular portion is in contact with the stepped portion to close the flow path. The support member is configured to rotatably support the portion toward the cylindrical portion. In the state where the liquid is not introduced from the tank, the on-off valve has the valve body in contact with the stepped portion to close the flow path, and the backflow of the liquid from the cylindrical portion to the connecting portion side is suppressed or prevented. Further, when the liquid is introduced from the tank to the connection portion, the support member that is a part of the rubber plate extends, the valve body rotates to the cylindrical portion side, and the flow path is opened. Thereby, a liquid can be poured from a connection part to the cylindrical part side. In this joint pipe, the cost can be reduced without complicating the structure for opening and closing the valve body. In addition, an on-off valve composed of a rubber plate can be held in the recess between the inner periphery of the tubular part and the end of the connection part for a long period of time, and the sealing property between the tubular part and the connection part Can be secured.

  According to a second aspect of the present invention, in the joint pipe according to the first aspect of the present invention, a hollow portion in which the contact surface is formed is provided on the inner peripheral side of the cylindrical portion.

  In the invention according to claim 2, since the inner peripheral side of the cylindrical part is provided with a hollow part in which a contact surface is formed, when the cylindrical part side screw part and the connection part side screw part are tightened The pressure-bonding portion between the wall surface of the connecting portion and the contact surface of the tubular portion is disposed in the hollow portion of the tubular portion. For this reason, the crimping | compression-bonding part of the end surface of a projection part and the contact surface of a cylindrical part is not exposed to the exterior of a joint pipe, but is protected by a hollow part.

According to a third aspect of the present invention, in the joint pipe according to the first or second aspect, the open / close valve has recesses formed on both sides of the rubber plate at the position where the support member is provided. It is characterized by that.

In the invention according to claim 3, the opening / closing valve is formed with recesses on both sides of the rubber plate where the support member is provided, so that the support member is easily extended and the valve body is easily rotated.

  According to a fourth aspect of the present invention, in the joint pipe according to any one of the first to third aspects, the connecting portion has a size capable of setting a sponge member that can be washed through the pipe. A small diameter portion having an inner diameter smaller than the diameter of the sponge member is formed along the axial direction on the inner peripheral side of the cylindrical portion.

  In the invention described in claim 4, a sponge member that can be cleaned through the pipe can be set in the connecting portion. In this joint pipe, the sponge member is set in the connection portion and the liquid is introduced, whereby the valve body rotates to the cylindrical portion side, and the sponge member passes through the valve body and is sent to the cylindrical portion. For this reason, clogging of the sponge member in the vicinity of the valve body of the joint pipe is suppressed. In addition, since the small-diameter portion having an inner diameter smaller than the diameter of the sponge member is formed along the axial direction on the inner peripheral side of the cylindrical portion, the sponge member is compressed and moves while contacting the inner wall of the small-diameter portion. . For this reason, the small diameter part of a cylindrical part is washable with a sponge member.

  According to the present invention, it is easy to process the cylindrical portion and the connecting portion constituting the joint pipe, and mass production of the joint pipe is possible. Moreover, it can suppress that the connection part of a cylindrical part and a connection part loosens, and can hold | maintain an on-off valve between a cylindrical part and a connection part over a long period of time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a joint pipe 10 according to an embodiment of the present invention. The joint pipe 10 includes a cylindrical portion 12 in which a flow path 14 through which a liquid (for example, beer or the like) can pass is formed. On the inner peripheral side of the cylindrical portion 12, a large diameter portion 12A on the upstream side in the fluid introduction direction (lower side in FIG. 1), and the diameter gradually increases from the large diameter portion 12A toward the downstream side in the fluid introduction direction. And a small diameter portion 12C formed along the axial direction downstream of the tapered portion 12B in the fluid introduction direction. That is, the flow path 14 is comprised by the large diameter part 12A, the taper part 12B, and the small diameter part 12C.

  As shown in FIG. 4, a hose 62 (pipe) is connected via a joint 18 to one end of the cylindrical portion 12 that is on the downstream side in the liquid introduction direction (upper side in FIG. 4). The hose 62 is connected to a server (not shown) for supplying beer, for example. Further, a cylindrical connecting portion 16 is provided at the other end of the cylindrical portion 12 which is the upstream side in the liquid introduction direction (the lower side in FIG. 4), and this connecting portion 16 is connected to the cleaning tank 70. Has been. In the present embodiment, the connecting portion 16 is connected to the cleaning tank 70, but the connecting portion 16 may be connected to the cleaning tank via an intervening member (not shown).

  As shown in FIG. 1, the inner peripheral portion on the other end side (upstream side in the liquid introduction direction) of the cylindrical portion 12 is larger in diameter than the large diameter portion 12A, and the cylindrical portion side screw is formed on the inner peripheral portion. A threaded portion 12D as a portion is formed. Further, the outer peripheral portion of the connection portion 16 opposite to the cleaning tank 70 has a larger diameter than the outer periphery of the connection portion 16 on the cleaning tank 70 side, and the large diameter portion is screwed into the screw portion 12D. A threaded portion 16A is formed as a part-side threaded portion.

  As shown in FIG. 3, on the outer periphery of the connection portion 16, a wall surface 16 </ b> D that protrudes in the radial direction from the screw portion 16 </ b> A at a position adjacent to the screw portion 16 </ b> A in the direction in which the screw portion 12 </ b> D of the cylindrical portion 12 is screwed. A protruding portion 16 </ b> C provided with is formed. The wall surface 16 </ b> D protrudes outward from the end of the screw portion 16 </ b> A in a direction substantially orthogonal to the outer periphery of the connection portion 16. Moreover, the hollow part 15 with a larger internal diameter than the screw part 12D is formed in the cylindrical part 12 in the position adjacent to the screw part 12D. A contact surface 15 </ b> A that protrudes in a direction substantially orthogonal to the inner periphery of the recess 15 is formed at the step between the screw portion 12 </ b> D and the recess 15 of the cylindrical portion 12. 15 A of this contact surface is formed in the position which the wall surface 16D of the connection part 16 can contact when the screw part 12D and the screw part 16A are screwed together. Further, the outer diameter of the protruding portion 16C is smaller than the inner diameter of the recessed portion 15, and the inner peripheral surface of the recessed portion 15 and the outer peripheral surface of the protruding portion 16C when the screw portion 12D and the screw portion 16A are screwed together. Are configured not to interfere with each other. Then, by screwing and tightening the screw portion 16A of the connecting portion 16 to the screw portion 12D of the cylindrical portion 12, the connecting portion 16 is attached to the cylindrical portion 12, and the wall surface 16D of the connecting portion 16 is the cylindrical portion. 12 contact surfaces 15A.

  As shown in FIG. 1, an opening 16B through which a fluid flows is formed in the core of the connecting portion 16, and the opening 16B is a substantially cylindrical sponge member 30 (see FIG. 1) for cleaning the inside of the hose 62. 4) is formed in a size that can be set. The inner diameter of the opening 16B is smaller than the inner diameter of the large-diameter portion 12A of the cylindrical portion 12, and a step portion 22 is formed at the end of the connection portion 16 opposite to the cleaning tank 70. An opening / closing valve 20 that can open and close the flow path 14 is disposed adjacent to the step portion 22 between the connection portion 16 and the cylindrical portion 12. The cylindrical part 12 and the connection part 16 are formed, for example with the metal. The mounting structure of the on-off valve 20 will be described later.

  As shown in FIGS. 2A to 2C, the on-off valve 20 includes a circular rubber plate 24 and is a part of a circle on the inner diameter side of the circumferential portion 24 </ b> A of the rubber plate 24. A slit S1 that is cut in a circular shape leaving the portion 25 is formed, and a circular portion inside the slit S1 is a valve body 26. Concave portions 27 are formed on both sides of the rubber plate 24 around the support portion 25 and the support portion 25, and the thickness around the support portion 25 and the support portion 25 is thinner than the thickness of the rubber plate 24 in other portions. Is formed. A corner portion 27A in the recess 27 is cut out in an R shape. A circular opening 26 </ b> B is formed at the center of the valve body 26. In the present embodiment, the angle θ1 of both ends in the circumferential direction of the slit S1 with respect to the center of the rubber plate 24 is set to about 40 °, and the angle θ2 of both ends in the circumferential direction of the concave portion 27 with respect to the center of the rubber plate 24 is It is set to about 60 °.

  As shown in FIG. 1, a rigid member 28 including support portions 28 </ b> A and 28 </ b> B supported on the upper surface and the lower surface of the valve body 26 is fitted in the opening 26 </ b> B of the valve body 26. The rigid member 28 is formed of a material (for example, resin) harder than the rubber material of the valve body 26 so that the circular portion of the valve body 26 is not deformed.

  Between the cylindrical portion 12 and the connecting portion 16, the stepped portion 22, the end surface 13 of the large-diameter portion 12 </ b> A, and the inner peripheral portion of the cylindrical portion 12 adjacent to the stepped portion 22 are disposed downstream of the stepped portion 22 in the liquid introduction direction. A concave portion 17 is formed, and a circumferential portion 24A of the rubber plate 24 is sandwiched between the concave portion 17. Then, the circumferential portion 24A of the rubber plate 24 is sandwiched and fixed by the concave portion 17 by screwing and tightening the screw portion 12D of the cylindrical portion 12 and the screw portion 16A of the connecting portion 16.

  In a normal state, the opening / closing valve 20 has the valve body 26 and the rubber plate 24 on the same plane by the support portion 25, and the flow path 14 is closed by the valve body 26 contacting the stepped portion 22. On the other hand, as shown in FIG. 5, when the liquid is introduced, the rubber support portion 25 extends and the valve body 26 rotates to the downstream side in the liquid introduction direction, so that the flow path 14 is opened. ing. At that time, since the thickness of the support portion 25 and the concave portion 27 around the support portion 25 is thinner than the thickness of the rubber plate 24, the support portion 25 is easily stretched and even when fluid is introduced at a low fluid pressure. It becomes easy to turn to the valve body 26. In addition, since the rigid member 28 is provided in the central portion of the valve body 26, the valve body 26 is stably held at a position where the flow path 14 is closed, and the valve body 26 is moved to the cylindrical portion 12 side by introducing liquid. It is possible to rotate smoothly. Thereby, when the valve body 26 comes into contact with the stepped portion 22, the backflow of fluid can be suppressed.

  In addition, as a material which comprises the rubber plate 24 as the on-off valve 20, SBR, NBR, EPDM, silicone rubber, fluororubber, IIR (butyl rubber), natural rubber, etc. are used, for example. Further, the material of the rigid member 28 is preferably a material harder than the rubber plate 24 in order to prevent deformation of the circular portion of the rubber plate 24. For example, PBT (polybutylene terephthalate), polypropylene, polyacetal, or the like is used. .

  As shown in FIG. 4, the joint 18 includes a cap nut 42 at one end of a substantially L-shaped tubular joint body 40. The threaded portion 42 </ b> A of the cap nut 42 is screwed into a threaded portion 12 </ b> E formed at the other end of the tubular portion 12. An annular locking member 44 is disposed on the inner wall of the cap nut 42, and a protrusion 40 </ b> A provided at one end of the joint body 40 is locked to the locking member 44. An annular seal member 46 is disposed between the longitudinal end face of the protrusion 40A of the joint body 40 and the longitudinal end face of the tubular portion 12, and the cap nut 42 and the joint body 40 are sealed. Has been.

  Further, an O-ring 48 provided in a groove formed on the inner peripheral surface of the joint body 40, a ring member 52 disposed adjacent to the groove, and a hose 62 are fixed to the other end of the joint body 40. A lock claw 50 having a substantially V-shaped cross section is provided. Further, the release claw 50 expands the diameter of the lock claw 50 to release the lock claw 50 from getting into the hose 62, and the holding member prevents the release ring 54 from coming off from the joint body 40 on the inner peripheral side of the joint body 40. 56 are provided.

  When the hose 62 is inserted from the insertion port provided at the other end of the joint body 40, the outer peripheral surface of the hose 62 is inserted into the back side of the joint body 40 while sliding the lock claw 50, and the hose 62 is in a coupled state. In this coupled state, when a liquid flows into the hose 62 and an internal pressure is applied, the hose 62 receives a force in a direction in which the hose 62 comes out of the joint body 40, and the hose 62 and the lock claw 50 move slightly to the insertion port side. Bites into the outer peripheral surface of the hose 62. As a result, the gripping force of the lock claw 50 on the hose 62 is increased, and the joint 18 and the hose 62 are firmly connected.

  The connecting portion 16 is formed in such a size that the substantially cylindrical sponge member 30 for cleaning the joint pipe 10 and the hose 62 can be set in the opening portion 16B. Further, the inner diameter of the small diameter portion 12 </ b> C of the cylindrical portion 12 is set smaller than the outer diameter of the sponge member 30. As the sponge member 30, for example, foamable polyurethane is used.

  Next, the operation of the joint pipe 10 of the present invention will be described.

  In this joint pipe 10, the circumferential portion 24 </ b> A of the rubber plate 24 constituting the on-off valve 20 is brought into contact with the end surface 13 of the cylindrical portion 12, and the screw portion 16 </ b> A of the connecting portion 16 is screwed to the screw portion 12 </ b> D of the cylindrical portion 12. By tightening together, the connecting portion 16 is attached to the tubular portion 12. At that time, the circumferential portion 24 </ b> A of the rubber plate 24 is formed by the recess 17 formed by the end surface 13 of the cylindrical portion 12, the inner peripheral surface of the cylindrical portion 12 adjacent to the end surface 13, and the stepped portion 22 of the connecting portion 16. It is pinched and fixed. Further, by tightening the screw portion 16A of the connecting portion 16 to the screw portion 12D of the cylindrical portion 12, the wall surface 16D of the connecting portion 16 is pressure-bonded to the contact surface 15A of the cylindrical portion 12 (see FIG. 3). For this reason, loosening of the screw part 12D of the cylindrical part 12 and the screw part 16A of the connection part 16 is suppressed by the frictional resistance between the wall surface 16D of the connection part 16 and the contact surface 15A of the cylindrical part 12.

  Moreover, in this joint pipe 10, the connection part 16 provided in the end of the cylindrical part 12 is connected to the beer barrel (illustration omitted). When cleaning the hose 62 and the server, as shown in FIG. 4, the beer barrel (not shown) of the connecting portion 16 is removed, and the substantially cylindrical sponge member 30 is set in the connecting portion 16. Further, a cleaning tank 70 filled with water as a cleaning liquid is attached to the connecting portion 16. Then, as shown in FIG. 5, when a predetermined gas (for example, carbon dioxide gas) is introduced and water is introduced into the flow path 14 of the joint pipe 10 by the gas pressure, the valve body 26 of the on-off valve 20 is It rotates downstream in the introduction direction, and the flow path 14 is opened. At this time, as shown in FIGS. 5B and 5C, the sponge member 30 passes through the on-off valve 20 together with water by opening the valve body 26 and moves in the flow path 14. At this time, since the support portion 25 of the valve body 26 and the surrounding thickness are thinner than the thickness of the rubber plate 24, the support portion 25 is easily extended, and the valve body 26 is easily rotated downstream in the introduction direction. For this reason, it is possible to prevent the sponge member 30 from being clogged in the vicinity of the valve body 26.

  As shown in FIG. 6, the sponge member 30 that has passed through the valve body 26 moves in the flow path 14 of the cylindrical portion 12. At this time, the inner diameter of the small-diameter portion 12C of the cylindrical portion 12 is set to be smaller than the outer diameter of the sponge member 30, and the sponge member 30 is compressed and moves while contacting the inner wall of the small-diameter portion 12C. The inside of 12C is cleaned. Further, as shown in FIG. 7, the sponge member 30 is sent from the joint pipe 10 through the joint 18 into the hose 62 along the water introduction direction. At this time, the inner diameter of the hose 62 is set to be smaller than the outer diameter of the sponge member 30, and the inside of the hose 62 is cleaned by the sponge member 30 moving while contacting the inner wall of the hose 62. Further, the sponge member 30 is sent to a server (not shown) on the downstream side of the hose 62, and the inside of the server is cleaned.

  In such a joint pipe 10, the beer barrel (not shown) connected to the connection portion 16 is removed, and then the sponge member 30 is set in the connection portion 16 and the cleaning tank 70 is attached. The hose 62 and the server (not shown) can be efficiently cleaned. Moreover, since the small diameter part 12C whose inner diameter is smaller than the outer diameter of the sponge member 30 is formed in the cylindrical part 12 of the joint pipe 10, the small diameter part 12C can be washed with the sponge member 30. When the fluid is not introduced into the joint pipe 10 (when the pressure is not applied in the direction in which the sponge member 30 is passed), the valve body 26 is closed by contacting the stepped portion 22, and the valve body 26 is closed. The generation of the backflow in the reverse direction (on the connection part 16 side) can be suppressed or prevented.

  Further, in this joint pipe 10, a threaded portion 12D is formed on the inner periphery of the tubular portion 12, a threaded portion 16A is formed on the outer periphery of the connecting portion 16, and the tubular portion is tightened by tightening the threaded portion 12D and the threaded portion 16A. 12 and the connection part 16 are fixed, so that the cylindrical part 12 and the connection part 16 can be easily processed, and the joint pipe 10 can be mass-produced. Further, as shown in FIG. 3, when the screw portion 12D and the screw portion 16A are tightened, the cylindrical portion is caused by the frictional resistance of the crimping portion between the wall surface 16D of the connecting portion 16 and the contact surface 15A of the cylindrical portion 12. It is possible to suppress loosening of the twelve screw parts 12D and the screw part 16A of the connection part 16. Further, since the crimping portion between the wall surface 16D of the protruding portion 16C and the contact surface 15A of the cylindrical portion 12 is disposed inside the hollow portion 15, the crimping portion between the wall surface 16D and the contact surface 15A is not exposed to the outside, It is protected by the recess 15. For this reason, the circumferential portion 24A of the rubber plate 24 can be held in the concave portion 17 between the step portion 22 of the connection portion 16 and the end surface 13 of the cylindrical portion 12 over a long period of time. 16 can be secured.

  On the other hand, the joint pipe 100 shown in FIG. 8 includes a metal outer pipe 102 and an inner pipe 104 inserted inside the outer pipe 102. In this joint pipe 100, the on-off valve 20 is provided in a recess 106 formed by a step portion 22 formed on the inner peripheral side of the outer pipe 102, an outer peripheral surface of the outer pipe 102, and a distal end portion 104 </ b> A of the inner pipe 104. A circumferential portion 24A of the rubber plate 24 that constitutes is sandwiched.

  In this joint pipe 100, it is difficult to process the stepped portion 22 of the outer pipe 102 with a predetermined roughness. Further, it is necessary to accurately process the inner diameter of the outer tube 102 and the outer diameter of the inner tube 104. Further, as shown in FIG. 8B, the thick portion 102A of the outer tube 102 is formed with a thin portion 102B that is recessed in a rectangular shape in accordance with the lever shape in order to attach a counterpart lever (not shown). Therefore, it is difficult to process the thick portion 102A and the thin portion 102B.

  On the other hand, in the joint pipe 10 of the present embodiment, the threaded portion 12D is formed on the inner periphery of the tubular portion 12, and the threaded portion 16A is formed on the outer periphery of the connecting portion 16, so the tubular portion 12 and the connecting portion are formed. 16 processing is easy. Moreover, since the step part 22 is an end surface of the connection part 16, the step part 22 can be easily processed into a predetermined roughness. Moreover, since the cylindrical part 12 is formed by one tube body, when forming a thin part for attaching a counterpart lever (not shown) to the thick part of the cylindrical part 12, FIG. Compared with the outer tube 102 shown in FIG. For this reason, it can respond to mass production of the joint pipe 10.

  In the above-described embodiment, the wall surface 16D is formed adjacent to the screw portion 16A of the connection portion 16, and the contact surface 15A is formed adjacent to the screw portion 12D of the cylindrical portion 12. However, the present invention is not limited thereto. The wall surface 16D may be formed at a position away from the screw portion 16A of the connecting portion 16, and the contact surface 15A may be formed at a position away from the screw portion 12D of the cylindrical portion 12.

It is sectional drawing which shows the joint pipe which concerns on one Embodiment of this invention. It is the top view and sectional drawing which show the rubber plate which comprises the on-off valve provided in the joint pipe shown in FIG. (A) is an expanded sectional view which shows the structure of the thread part of the cylindrical part of a joint pipe shown in FIG. 1, and the thread part vicinity of a connection part, (B) is the end surface and cylinder of the projection part which were formed in the connection part. It is an expanded sectional view which shows the state by which the contact surface of the shape part was crimped | bonded. It is sectional drawing which shows the state which set the sponge member to the connection part of the coupling pipe shown in FIG. 1, and connected the washing tank. It is sectional drawing which shows the process in which the sponge member shown in FIG. 4 moves in the cylindrical part of a coupling pipe. It is sectional drawing which shows the process in which a sponge member moves the inside of a cylindrical part. It is sectional drawing which shows the process in which a sponge member moves in the hose. (A) is sectional drawing which shows the joint pipe of a comparative example, (B) is sectional drawing in the direction orthogonal to (A).

Explanation of symbols

10 Joint pipe 12 Tubular part 12C Small diameter part 12D Screw part (cylindrical part side thread part)
14 flow path 15 hollow part 15A contact surface 16 connection part 16A thread part (connection part side thread part)
16C Protrusion 16D Wall 17 Recess 20 Open / close valve 22 Step 24 Rubber plate 24A Circumference 25 Support (support member)
26 Valve body 30 Sponge member 62 Hose (pipe)
70 Cleaning tank S1 Slit

Claims (4)

One end connected to the pipe and having a flow path, a connecting portion provided at the other end of the cylindrical portion, and a tank is connected or connected via an interposed member, the connecting portion and the cylindrical shape A joint pipe provided with an on-off valve provided between the parts,
A cylindrical part-side threaded part formed on the inner peripheral side of the cylindrical part;
A connecting portion side screw portion formed on the outer peripheral side of the connecting portion and screwed to the cylindrical portion side screw portion;
A recess formed between an inner periphery of the tubular portion and an end portion of the connecting portion, and sandwiching the on-off valve when the tubular portion side screw portion and the connecting portion side screw portion are screwed together When,
A wall surface that is formed in a direction in which the cylindrical portion-side screw portion on the outer peripheral side of the connecting portion is screwed, and projects in a radial direction from the connecting portion-side screw portion;
A contact surface that is formed on the tubular portion and is crimped to the wall surface when the tubular portion-side screw portion and the connecting portion-side screw portion are screwed together;
Have
A stepped portion is formed at a position adjacent to the concave portion with the inner diameter of the cylindrical portion being larger than the inner diameter of the connecting portion,
The on-off valve includes a rubber plate having an outer peripheral portion sandwiched between the recesses, and forms a slit that is cut in a circular shape, leaving a part of the rubber plate in contact with the stepped portion. A valve body that closes the flow path, and a support member that rotatably supports the end of the valve body toward the tubular portion side,
A joint pipe characterized in that the valve body is rotated by fluid flowing from the connecting part side to the cylindrical part side.   2. The joint pipe according to claim 1, further comprising a hollow portion in which the contact surface is formed on an inner peripheral side of the cylindrical portion.   The joint pipe according to claim 1 or 2, wherein the opening / closing valve has recesses formed on both surfaces of the rubber plate at a position where the support member is provided. The connecting portion is formed in a size capable of setting a sponge member that can be washed through the pipe,
The small diameter part of the internal diameter smaller than the diameter of the said sponge member is formed in the inner peripheral side of the said cylindrical part along the axial direction, The any one of Claim 1 to 3 characterized by the above-mentioned. The joint pipe described in 1.

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