JP2008025612A - Pipe joint made of resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint made of resin not to be easily damaged even when a strong external force is exerted to a joint body made of resin. <P>SOLUTION: The pipe joint 1 made of resin comprises a plurality of pipe joint portions 6, a fluid passage 5 connected to a plurality of the pipe joint portions 6, the joint body 2 by resin formation comprising flange-shaped annular ribs 7a, 7b, 7c in the outer periphery of each pipe joint portions 6, and a body jacket 3 provided in the outer periphery of each pipe joint portions 6. Adjoining annular ribs 7a and 7b and annular ribs 7a and 7c of each pipe point portions 6 of the joint body 2 are jointed with each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to pipe joints such as water pipes and air conditioning pipes, and more particularly to resin pipe joints used as flexible pipe joints for water supply and hot water supply.

  In general, many cheese-type pipe joints 101 as shown in FIG. 11, for example, are used as flexible pipe joints such as crosslinked polyethylene pipes for water supply and hot water supply. In this pipe joint 101, the body 102 is formed of a metal material (gun metal). From the viewpoint of reducing the manufacturing cost due to the recent rise in metal materials, the body as shown in FIGS. Resin pipe joints 104 and 105 in which 102 is made of a synthetic resin have been developed and used.

  These resin pipe joints 104 and 105 have a structure in which ribs 107 that support the pipe connection portions 106 are formed at the root portions of the pipe connection portions 106 of the body 102 to which the flexible pipe is connected. Is formed independently at each pipe connecting portion 106 and has a gap 108 between other adjacent ribs 107.

  Therefore, when a strong external force is applied to these resin pipe joints 104 and 105 from the direction of the arrow A, for example, there is a gap 108 between the adjacent ribs 107, so that the ribs 107 support each other and resist the external force. This is not possible, and shearing force and bending force act directly on the pipe portion of the branching portion 109 of the body 102. For this reason, there is a problem in that the resin body 102 that is clearly weaker in strength than metal is damaged.

  Further, since the conventional resin pipe joints 104 and 105 have a structure in which ribs are not formed at the branch portion 109 of the body 102, the cap nuts 110 provided at the left and right pipe connection portions 106 in the figure are floors, grounds, and the like. The branch portion 109 of the body 103 is in a floating state. For this reason, there has been a problem that the body 102 is easily broken when it is stepped on or a strong external force is applied.

  In addition, as a pipe joint which formed the body in resin, there exist some which are disclosed by patent document 1, for example.

Japanese Patent Laid-Open No. 2003-269664

  The present invention was developed in view of the above-described problems, and is a resin that is not easily damaged even when a strong external force is applied to a joint body (body) formed of the resin. An object is to provide a pipe joint.

  The present invention described in claim 1 includes a resin-formed joint body including a plurality of pipe connection portions and fluid passages communicating with the respective pipe connection portions, and a collar-like annular rib on an outer periphery of each of the pipe connection portions. A resin pipe joint comprising a main body outer cylinder provided on the outer periphery of each of the pipe connection portions, wherein the adjacent annular ribs of the pipe connection portions of the joint body are bonded to each other It is a pipe joint.

  The present invention described in claim 2 includes a resin-formed joint body including a plurality of pipe connection portions and fluid passages communicating with the respective pipe connection portions, and a collar-like annular rib on the outer periphery of each of the pipe connection portions. In the resin pipe joint comprising at least a main body outer tube provided on the outer periphery of each pipe connecting portion and a cap nut provided on the outer periphery of the front end portion of each main body outer tube, a tip is provided on the outer periphery of the central portion of the joint main body. Is a resin pipe joint provided with an annular rib having a size that is flush with the outer surface of the cap nut.

  The present invention described in claim 3 includes a resin-formed joint body including a plurality of pipe connecting portions and fluid passages communicating with the respective pipe connecting portions, and a collar-like annular rib on the outer periphery of each of the pipe connecting portions. A resin pipe joint comprising at least a main body outer cylinder provided on the outer periphery of each pipe connecting portion and a cap nut provided on the outer periphery of the distal end portion of each main body outer cylinder, adjacent to each pipe connecting portion of the joint main body. In the resin pipe joint, the annular ribs are connected to each other, and an annular rib having a tip that is flush with the outer surface of the cap nut is provided on the outer periphery of the central portion of the joint body.

  The present invention according to claim 4 is the resin pipe joint according to claim 1, 2 or 3, wherein the joint body is a cheese type or an elbow type.

  The present invention according to claim 5 is the resin pipe joint according to claim 2, wherein the joint body is a socket type.

  In the resin pipe joint according to the first aspect of the present invention, since the adjacent annular ribs formed on the outer periphery of each pipe connecting portion of the joint body are coupled to each other, they are coupled to each other even if an external force is applied to the joint body. The adjacent annular rib can resist the external force, and the proof stress is increased as compared with the conventional resin pipe joint, and the joint body is not easily damaged.

  The resin pipe joint of the present invention according to claim 2 has a size such that the tip is flush with the outer surface of the cap nut provided at each pipe connection portion of the joint body on the outer periphery of the center part of the joint body. Since the annular rib is provided, the joint body can be supported by the annular rib and the cap nut even when an external force is applied to the joint body, and the resin joint body is not easily damaged.

  Moreover, the resin pipe joint of the present invention according to claim 3 has a size in which the adjacent annular ribs of the joint body are coupled to each other and are flush with the outer surface of the cap nut provided in each pipe connection portion. Since an annular rib is provided in the joint body, even if an external force is applied to the joint body, it can resist the external force by an annular rib having a size that is flush with the outer surface of the cap nut, together with the mutually connected annular rib. This can prevent the resin joint body from being damaged even by a stronger external force.

  Moreover, since the resin pipe joint of this invention of Claim 4 is a cheese type | mold or elbow type pipe joint which has the effect of above-mentioned Claims 1-3, it is the product made from the conventional cheese type | mold or elbow type resin. Compared to pipe joints, it has stronger proof strength against external forces and will not be easily damaged.

  The resin pipe joint of the present invention according to claim 5 is a socket-type pipe joint having the effect of the above-described claim 2, and therefore more resistant to external force than the conventional socket-type resin pipe joint. It has strong proof stress and will not break easily.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIGS. 1-3 is a figure regarding the cheese type resin pipe joint of 1st Example concerning this invention, Comprising: This resin pipe joint 1 has the joint main body 2, the main body outer cylinder 3, and the cap nut 4 at least. It consists of a provided structure.

  More specifically, the joint body 2 is formed of a synthetic resin in a T-shaped cheese shape (inverted T-shape in the figure), and includes three pipes communicated by an internal fluid passage 5 (FIG. 2). A circular hook-like annular rib 7a, 7b, 7c for supporting the pipe connecting part 6 is formed on the outer periphery of the pipe connecting part 6 near the base part and provided adjacent to each other. The annular rib 7a and the annular rib 7b, and the annular rib 7a and the annular rib 7c are integrally coupled. Further, on the outer periphery of the central portion 2a of the joint body 2 (FIG. 1) corresponding to the branch portion 5a of the fluid passage 5, the tip 9a is connected to the outer surface 4a of the cap nut 4 provided on the left and right pipe connecting portions 6 shown in the figure. Circular rib-shaped annular ribs 9 having the same size are formed. The end 9b of the annular rib 9 is formed so as to support the annular rib 7a. The annular rib 9 and the annular ribs 7b and 7c are formed in parallel with each other at a predetermined interval. The annular rib 9 has a circular bowl shape having a larger diameter than the annular ribs 7b and 7c, and the thickness thereof is the same as or slightly thicker than the annular ribs 7a, 7b and 7c.

  A fitting part 10 for fitting the main body outer cylinder 3 is formed on the outer peripheral part adjacent to the annular ribs 7a, 7b, 7c (FIG. 3) of each pipe connecting part 6 and the tip of each pipe connecting part 6 Two grooves 12 into which the O-ring 11 is fitted are formed on the outer peripheral portion near the portion.

  Each groove 12 is fitted with an O-ring 11, and the fitting portion 10 of each joint body 2 is fitted with a locking portion 3 a (FIG. 1, FIG. 2) with a reduced diameter of the main body outer cylinder 3. Yes. Between this main body outer cylinder 3 and the pipe connection part 6 (FIG. 2), the clearance gap 13 of the predetermined space | interval is provided. A retaining ring 14, a spacer 15, a compression ring 16, and a diameter-expanding piece (not shown) are provided on the inner peripheral surface of the main body outer cylinder 3 sequentially from the open end side to the back side. The rear end 16a of the compression ring 16 is in contact with a contact portion 3b formed on the inner peripheral surface of the main body outer cylinder 3 near the locking portion 3a. A gap is provided between the compression ring 16 and the O-ring 11 so that a flexible pipe such as a crosslinked polyethylene pipe can be fitted therein. In this joint, when the cross-linked polyethylene pipe is inserted to the back, the pipe end comes into contact with a diameter-expanding piece (not shown) that is removably inserted into the slit of the compression ring 16 and is thus detached. At the same time, when the compression ring 16 is tightened with a resilient tightening force, the tube is water-stopped.

  In the cheese-shaped resin pipe joint 1 of the illustrated first embodiment having the above-described configuration, since the annular ribs 7a, 7b, 7c that support the pipe connecting portions 6 are coupled, an external force is applied to the joint body 2. Even if it acts on it, it can resist external force with the mutually joined annular rib 7a, 7b, 7c, and it can prevent that the joint main body 2 is damaged. In addition, an annular rib 9 that is flush with the outer surface 4a of the cap nut 4 is formed on the outer periphery of the central portion of the joint body 2, so that the annular rib can be used even when stepped on or a strong external force is applied. The joint body 2 can be supported by the left and right pipe connecting portions 6 via 9 and the cap nut 4, and can be prevented from being easily broken.

  4 and 5 are diagrams relating to the cheese-type resin pipe joint of the second embodiment according to the present invention, and this resin pipe joint 1 is the cheese-type resin pipe joint of the first embodiment described above. However, some of the configurations are different, and the different configurations will be described.

  In the cheese-type resin pipe joint 1 of the second embodiment, ribs 15a and 15b are formed so as to cross the annular rib 9 on both sides on the tip 9a side of the annular rib 9 formed in the central portion 2a of the joint body 2. Is provided. Each of the ribs 15a and 15b has a substantially quarter circle shape. One rib 15a has both ends coupled to the annular rib 7b and the annular rib 9, and the other rib 15b includes the annular rib 7c and the annular rib 9. And both ends are joined. In addition, about the other structure of this 2nd Example, it is the same as that of the structure of 1st Example, The same code | symbol is attached | subjected to the same location and description is abbreviate | omitted.

  Since the cheese-type resin pipe joint 1 of the second embodiment having the above-described configuration has a structure in which ribs 15a and 15b are further provided on the resin pipe joint 1 of the first embodiment, the arrow A Even if an external force is received from the direction, since the annular rib 7b, the annular rib 7c and the annular rib 9 are connected and coupled by the ribs 15a and 15b, it can withstand a stronger external force, Breakage of the joint body 2 can be prevented.

  6 and 7 are diagrams relating to an elbow-type resin pipe joint according to a third embodiment of the present invention (note that the same reference numerals as those in the first embodiment are used for convenience). The resin pipe joint 1 is composed of at least a joint body 2, a body outer cylinder 3, and a cap nut 4.

  That is, the joint body 2 is formed in an L-shaped elbow shape with a synthetic resin, and includes two pipe connection portions 6 communicated by an internal fluid passage (not shown). The annular ribs 7a and 7c that support the pipe connecting portions 6 are formed on the outer periphery near the portion, and the adjacent annular ribs 7a and the annular ribs 7c are combined.

  Further, on the outer periphery of the central portion 2a of the joint body 2, each circular rib 9 in the shape of a circular bowl having a tip 9a that is flush with the outer surface 4a of the cap nut 4 provided in each pipe connection portion 6 shown in the figure. In the figure, they are crossed in a + shape. The end portions 9b of the annular ribs 9 are formed so as to support the annular ribs 7a and 7c. The one annular rib 9 and the annular rib 7a are formed in parallel at a predetermined interval, and the other annular rib 9 and the annular rib 7c are the same. Each of the annular ribs 9 is a circular bowl having a larger diameter than the annular ribs 7a and 7c, and the thickness is the same or the annular rib 9 is formed to be slightly thicker than the annular ribs 7a and 7c.

  A fitting part 10 for fitting the main body outer cylinder 3 is formed on the outer peripheral part adjacent to the annular ribs 7a, 7c of each pipe connecting part 6, and the outer peripheral part near the tip part of each pipe connecting part 6 is formed. Is formed with two grooves 12 for fitting the O-ring.

  In addition, the other structure of the resin pipe joint 1 of this 3rd Example is the same as that of the resin pipe joint 1 of the above-mentioned 1st Example, and abbreviate | omits description.

  The elbow-type resin pipe joint 1 according to the third embodiment has the above-described configuration, and the adjacent annular ribs 7a and 7c that support the pipe connecting portions 6 are joined together. Even when added to the main body 2, the external ribs 7a and 7c connected to each other can resist the bending external force, and the joint main body 2 can be prevented from being damaged by the external force. Further, since the annular ribs 9 that are flush with the outer surface 4a of the cap nut 4 are formed on the outer periphery of the central portion of the joint body 2, the pipe connection can be made even if it is stepped on or a strong external force is applied. Since the joint body 2 is supported by the cap nut 4 provided in the portion 6 and the annular rib 9, it is not easily broken.

  8 and 9 are diagrams relating to an elbow-type resin pipe joint according to a fourth embodiment of the present invention (note that the reference numerals in the drawings are the same as those in the third embodiment for convenience). In the resin pipe joint 1 of the fourth embodiment, the annular ribs 9 are provided on the diagonal line of the square center part 2a in the figure connecting the pipe connection parts 6 of the elbow-type joint body 2. The ends of the annular rib 9 are coupled to the corners of the annular ribs 7a and 7c to be coupled. Further, both side portions 9c of the tip 9a of the annular rib 9 are formed so as to be flush with the outer surface 4a of the cap nut 4 provided on each pipe connecting portion 6 of the joint main body 2 via the main body outer cylinder 3. . The annular rib 9 is thicker and more durable than the annular ribs 7a and 7c. In addition, the other structure of the resin pipe joint 1 of this 4th Example is the same as that of the resin pipe joint 1 of the above-mentioned 3rd Example, and abbreviate | omits description.

  The elbow-type resin pipe joint 1 of the fourth embodiment has the above-described configuration, and even if it is stepped on or a strong external force is applied to the joint body 2, the side portion 9c of the annular rib 9 and the cap nut 4 The outer surface 4a is in contact with a contact surface such as a floor to support the entire resin pipe joint 1, so that it is not easily broken. Moreover, since each annular rib 7a, 7c, 9 is mutually couple | bonded, it becomes a stronger rib also in intensity | strength.

  FIG. 10 is a view relating to a socket-type resin pipe joint according to a fifth embodiment of the present invention (note that the reference numerals in the figure are the same as those in the above embodiments for convenience), and are made of this resin. The pipe joint 1 includes a socket-type joint main body 2 provided with pipe connection portions 6 into which flexible tubes such as cross-linked polyethylene pipes are fitted on both sides, a main body outer cylinder 3 provided in each pipe connection portion 6, and a main body outer cylinder 3. A cap nut 4 is provided. Note that the water stop connection structure of the flexible pipe to both pipe connection portions 6 in the socket-type resin pipe joint 1 is the same as the structure described in the first embodiment, and the water stop connection in FIG. Structural illustrations and descriptions are omitted.

  In the socket-type resin pipe joint 1 of the fifth embodiment, a flange-shaped annular rib 9 is provided at the central portion 2a of the joint body 2. Similarly to the above-described embodiments, the annular rib 9 is formed such that the tip 9a is flush with the outer surface 4a of the cap nut 4 provided on the left and right pipe connecting portions 6 shown in the figure.

  In the socket-type resin pipe joint 1 of the fifth embodiment, the outer surface 4a of both cap nuts 4 and the tip 9a of the annular rib 9 of the central portion 2a are placed so as to contact the floor or the like, for example. Even if it is stepped on from above or other external force is applied, both the left and right cap nuts 4 receive external force from the central annular rib 9, and the central portion 2a of the joint body 2 is bent by bending force or the like. Can be prevented.

  In addition, the main body outer cylinder 3, the cap nut 4, and the spacer 15 in each of the above-described embodiments are also made of synthetic resin. The main body outer cylinder 3 and the cap nut 4 are made of polyethersulfone (PES) resin, a joint main body. 2 is injection-molded with polyphenylsulfone (PPSU) resin.

  Further, in the present invention, adjacent annular ribs are connected to each other where the adjacent annular ribs are integrally formed with resin, but are formed separately with resin so that each annular rib is in contact with adjacent locations. It is also included.

It is a front view of the cheese type resin pipe joint of the first embodiment according to the present invention. It is sectional drawing of the cheese type resin pipe joint of 1st Example concerning this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the coupling main body of the cheese type resin pipe fitting of 1st Example concerning this invention. It is a front view of the cheese type resin pipe fitting of 2nd Example concerning this invention. It is a front view of the coupling main body of the cheese type resin pipe fitting of 2nd Example concerning this invention. It is a front view of the elbow type resin pipe joint of 3rd Example concerning this invention. It is a front view of the joint main body of the elbow type resin pipe joint of 3rd Example concerning this invention. It is a front view of the elbow type resin pipe joint of 4th Example concerning this invention. It is a front view of the joint main body of the elbow type resin pipe joint of 4th Example concerning this invention. It is sectional drawing of the socket type resin pipe joint of 5th Example concerning this invention. It is a front view of the elbow type pipe joint which consists of a conventional metal body. It is a front view of the conventional elbow type resin pipe joint. It is a front view of the resin pipe joint of other examples of the conventional elbow type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin pipe joint 2a Center part of a joint main body 2 Joint main body 3 Main body outer cylinder 4 Cap nut 5 Fluid passage 6 Pipe connection part 7a, 7b, 7c Annular rib 9 Annular rib

Claims (5)

  A resin-formed joint body provided with a plurality of pipe connection portions and fluid passages communicating with the respective pipe connection portions, and provided with a collar-like annular rib on the outer periphery of each of the pipe connection portions, and provided on the outer periphery of each of the pipe connection portions A resin pipe joint comprising a main body outer cylinder, wherein the adjacent annular ribs of the pipe connecting portions of the joint body are bonded to each other.   A resin-formed joint main body provided with a plurality of pipe connection portions and fluid passages communicating with the respective pipe connection portions and provided with rib-like ribs on the outer periphery of each of the pipe connection portions, and a main body provided on the outer periphery of each of the pipe connection portions In a resin pipe joint comprising at least an outer cylinder and a cap nut provided on the outer periphery of the distal end portion of each main body outer cylinder, the tip is flush with the outer surface of the cap nut on the outer periphery of the central portion of the joint body. A resin pipe joint provided with an annular rib.   A resin-formed joint body provided with a plurality of pipe connection portions and fluid passages communicating with the respective pipe connection portions, and provided with a collar-like annular rib on the outer periphery of each of the pipe connection portions, and provided on the outer periphery of each of the pipe connection portions In a resin pipe joint comprising at least a main body outer cylinder and a cap nut provided on the outer periphery of the front end part of each main body outer cylinder, the adjacent annular ribs of the pipe connection parts of the joint main body are coupled to each other, and A resin pipe joint, characterized in that an annular rib having a size whose tip is flush with the outer surface of the cap nut is provided on the outer periphery of the central portion of the joint body.   The resin pipe joint according to claim 1, 2 or 3, wherein the joint body is a cheese type or an elbow type.   The resin pipe joint according to claim 2, wherein the joint body is a socket type.

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