JP4804861B2 - Header-base, manufacturing method thereof and header structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a compact header, which simply and surely connects header bases, and allow the connected state to be confirmed with eyes, while changing the sealing structure of a resinoid pipe on its outside surface to a sealing structure on its inside surface. <P>SOLUTION: The header bases have T-shape passages A1, A2 composed of inner pipes B1, B2, which are made of PPS resin and form inner passages via their spigots, and outer pipes E1, E2, which are made of transparent trogamid resin and cover the inner pipes B1, B2. The header is configured such that inside periphery sealing mechanisms are provided between both of the inner pipes B1, B2 and the outer pipes E1, E2, and a cylindrical element H2 for serving as one end of the passage is connected to the spigot, where F1, F2 are pipe holding rings, and G1, G2 are caps. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a header-base which brings about conversion of a resin pipe connection seal structure and a header structure using the same.

  In recent years, resin pipes have been widely used as pipes for water supply / hot water supply or drainage, and this is connected to a header to form a water supply / hot water supply or drainage system. The header structure usually includes an O-ring and a pipe holding ring. The O-ring is brought into contact with the outer surface of the resin pipe to provide a water stop function. It was a structure that digs into the surface.

  FIG. 1 is a half-cut view of a so-called one-push type header base, and FIG. 2 is a similar type of header. In the figure, reference numeral 21 denotes a T-shaped header base. A step 22 a is formed inside the L-shape of the flow path 22, and an O-ring 23 and a pipe holding ring 24 are built in the distal end 21 a of the header base 21. In this structure, the caps 25a and 25b are screwed onto the screw portion outside the tip portion 21a so as to cover them. The other flow path end is a sleeve 26. Therefore, as shown in FIG. 2, the sleeve 26 is sequentially inserted from the cap 25b to complete the header, and the O-ring 23 comes into contact with the outer surface 26a of the inserted sleeve 26 and the outer surface 30a of the resin pipe 30. The claw portion 24a of the pipe holding ring 24 has a structure that bites into these outer surfaces 26a and 30a and prevents the removal.

  In this way, the connection between the header base and between the header and the resin pipe has become extremely simple, but the resin pipe is not handled so carefully during construction or when it is carried in, and it is not attached to the surface of the resin pipe. There are cases where scratches are made. In this case, if the O-ring contacts over the scratch, it causes water leakage, and the work is re-executed. Needless to say, the sleeve surface of the header base body is also easily damaged.

  Furthermore, if the sleeve 26 is not completely inserted, water leakage may occur due to this, and the insertion point of the sleeve is conventionally related to the resistance at the time of insertion or when the sleeve is inserted. It was a qualitative judgment such as judging by the length of, and the integrity of visual insertion could not be verified. For this reason, there was a need to develop a new header that did not leak even when the resin pipe was damaged, including changes to the header structure.

  The present invention is a header that brings about a change in the seal structure at the time of connection between a resin pipe and a header base, and provides a complete sealing function even when the outer surface of the sleeve of the resin pipe or the header base is damaged. And a header using the same.

The first gist of the present invention is a T-shaped header base in which a straight channel and a rising channel are formed, and has a diameter substantially the same as the inner diameter of the resin pipe P into which the tip of the rising channel A1 is inserted. The outer cylinder E1 is formed with a peripheral groove C1 formed on the outer surface of the inner cylinder B1 and fitted with an O-ring D1. The outer cylinder E1 is formed facing the inner cylinder B1. A cap G1 that prevents the removal of these pipe retaining rings F1 after mounting the pipe holding ring F1 facing the front end is formed as a resin pipe insertion opening screwed into the outer cylinder E1, and the one end of the linear flow path A2 is connected to the cylinder H2. At the same time, the tip of the other end is formed as an inner cylinder B2 having an outer diameter substantially the same as the inner diameter of the cylinder H2, and a circumferential groove C2 is formed on the outer surface of the inner cylinder B2, and an O-ring D2 is fitted therein. The outer cylinder E2 is formed facing the inner cylinder B2. , The outer tube E2 front ends opposite to the pipe retaining ring F2 these slipped out preventing cap G2 of the cylindrical member H2 that is screwed into the outer cylinder E2 spigot and without after mounting of the inner cylinder B1, the The inner cylinder B2 and the cylinder H2 are integrally formed, and an inner diameter of the inner cylinder B2 facing the straight flow path is opposite to the inner cylinder B2 across the rising flow path. T-shaped, characterized in that it has a smaller diameter than the inner diameter of the cylinder H2 facing the straight flow path, and the inner cylinder B2 and the inner wall of the cylinder H2 are each flush with each other. This relates to a header substrate.

  Preferably, the outer cylinders E1 and E2 are made of a transparent material so that the tip of the cylinder H2 to be inserted can be seen.

  The second gist of the present invention is a method of manufacturing a T-shaped header-base, and the first step of molding the inner cylinders B1, B2 and cylinder H2 defined in the first invention with a PPS resin. , A second step of setting the molded product obtained in the first step in a mold for defining the outer shape of the header-base, and a third step of casting trogamide resin in the cavity forming the outer cylinder portion. The present invention relates to a method for producing a T-shaped header-base having a transparent outer cylinder portion, comprising a fourth step of taking out the header-base from the mold.

  Here, preferably, the PPS resin is selected from Fortron 1140A1 or Fortron 1130T6 manufactured by Polyplastics, and the trogamide resin is Trogamide CX7323 manufactured by Daicel Degussa.

  A third gist of the present invention is a T-shaped header to which the T-shaped header substrate of the first invention is connected, and a cylindrical body H2 at one end of the straight flow path A2 of the T-shaped header substrate is provided. Then, it is inserted into the cap G1 on the other end of the straight flow path A2 of the adjacent T-shaped header base, and the O-ring D2 is brought into contact with the inner peripheral surface of the cylindrical body H2, and the pipe is held on the outer peripheral surface of the cylindrical body H2. The present invention relates to a header structure in which a ring-shaped header base is sequentially connected by bringing a ring F2 into contact therewith.

  According to the header structure of the present invention, it is a header structure that realizes a compact conversion from the sealing structure of the outer surface of the resin pipe to the sealing structure of the inner surface, and the connection between the header bases is simple and reliable. In addition to the conventional header structure that seals the outer surface of the resin pipe, by applying the header of the present invention, it is possible to make a header with a structure that easily seals the inner surface of the resin pipe. In addition, when the outer surface of the resin pipe is damaged, the seal structure can be changed very easily.

  Of course, it is needless to say that the connection between the header and the base is ensured by making the outer cylinder portion of the header and the base transparent.

  The header structure according to the third aspect of the present invention will be described with reference to the header structure for conversion from the outer surface seal structure of the resin pipe to the inner surface seal structure. Such concerns are eliminated.

  When connecting the rising flow path A1 of the header and the resin pipe P, a portion having an outer diameter substantially the same as the inner diameter of the resin pipe P to be inserted, that is, the inner cylinder B1 has a circumferential groove C1 on its outer surface. The outer ring E1 is mounted on the header base so as to face the inner cylinder B1, and a resin pipe is inserted between the outer cylinder E1 and the inner cylinder B1. Accordingly, the inner surface of the resin pipe P and the O-ring D1 come into contact with each other to exhibit a sealing function. On the other hand, a pipe holding ring F1 and preferably a release ring I are also mounted at the tip of the outer cylinder E1, and a cap G1 is screwed onto the outer cylinder E1 so as to cover them. The claw portion of the pipe holding ring F1 bites into the outer surface and exhibits a function of preventing the removal.

  Normally, when water leaks due to scratches on the outer surface of the resin pipe P, the resin pipe P is replaced, and in some cases, the header itself may be replaced. Avoids scratches on the outer surface of the resin pipe P that are directly connected to a water leak accident, and the inner surface of the resin pipe P that is hardly damaged during work or transportation is the target site for sealing. The resin pipe P whose outer surface is damaged by adopting it can be used.

  A specific example of the holding mechanism of the resin pipe P will be described. The front end of the outer cylinder E1 has a V-shaped point J, and the pipe holding ring F1 has the same shape as the V-shaped point J. A claw portion is formed on the inner side. The cap G1 is screwed to cover the pipe holding ring F1, and an inner tapered surface L facing the outer diameter side tapered surface K of the V-shaped pipe holding ring F1 is provided on the inner peripheral surface of the cap G1. Is.

  When the resin pipe P is about to escape, pressure is applied to the inside of the pipe, that is, a fluid is caused to flow inside. As a result, when the resin pipe P is about to escape, the claws bite into the outer surface of the pipe. The pipe holding ring F1 also moves in the direction of exiting. However, the taper surface K of the outer side of the pipe holding ring F1 and the taper surface L of the cap come into contact with each other, and this contact causes the pipe holding ring F1 to move toward the inner diameter, where further claw biting occurs. This will prevent the pipe from coming off.

  The claw that has bitten into the outer surface of the resin pipe P can be released by screwing off the cap G1, but preferably the release ring I is mounted next to the pipe holding ring F1. . The release ring I is a ring having a tapered surface N facing the inner diameter tapered surface M of the V-shaped pipe holding ring F1, and can be pushed inward from between the cap G1 and the resin pipe P. It has a structure. Therefore, the inner diameter side tapered surface M of the pipe holding ring F1 can be pushed inward by pushing the release ring I inward without having to unscrew the cap G1. The bite of the part is released and the resin pipe P can be pulled out.

  The connection between the header straight passage A2 and the cylinder H2 is exactly the same as the connection between the passage A1 and the resin pipe P, and the description is omitted here. It is reliable and easy to remove.

  In the header-base body according to the first invention of the present invention, it is preferable that the outer cylinders E1 and E2 are made of a transparent material, and the outer cylinders E1 and E2 are A trogamide resin is suitable, while the inner cylinders B1, B2 and the cylinder H2 are preferably made of a metal such as opaque PPS resin or gun metal.

  The second invention provides a suitable method for manufacturing such a header-base, and the inner cylinder and the cylinder are integrally molded by PPS resin or the like, and this is a model having a predetermined outer mold of the header. -The header-base is suitably molded by setting in the mold and casting the trogamide resin by so-called in-mold molding to form the outer cylinder.

  In addition, trogamide resin is a microcrystalline polyamide resin (Daicel Degussa), and has the characteristics that there is little shrinkage at the time of molding and less warpage, and further, it has high optical transparency and high mechanical stability. This resin has features such as high heat distortion temperature, excellent chemical resistance, and low shrinkage. Among these, CX7323 is most preferable for the trogamamide resin. On the other hand, the PPS resin is selected from Fortron 1140A1 or Fortron 1130T6 manufactured by Polyplastics.

  Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. FIG. 3 is an exploded half cut view of the header base X according to the first embodiment of the present invention, and FIG.

  The T-shaped header base X has a linear flow path A2 and a rising flow path A1 formed therein, and an inner cylinder having an outer diameter substantially the same as the inner diameter of the resin pipe P into which the tip of the rising flow path A1 is inserted. B1 is formed, a circumferential groove C1 is formed on the outer surface of the inner cylinder B1, and an O-ring D1 is fitted. The outer cylinder E1 is mounted on the header base so as to face the inner cylinder B1, and is opposed to the front end of the outer cylinder E1. Then, after the pipe holding ring F1 is mounted, a cap G1 that prevents these slipping out is formed as a resin pipe insertion opening screwed to the outer cylinder E1. In the illustrated example, a release ring I for releasing the biting of the claw portion of the pipe holding ring F1 is mounted in the cap G1.

  On the other hand, one end of the straight flow path A2 is formed as a cylindrical body H2, which is used for connection with an adjacent header base X. The relationship between the cylindrical body H2 and the other side of the straight channel A2 is exactly the same as the relationship between the resin pipe P and the rising channel A1. That is, as will be described later, the inner peripheral surface of the cylindrical body H2 is sealed by the O-ring D2, and the outer peripheral surface is prevented from coming off by the pipe holding ring F2.

  Now, the other end of the straight channel A2 is an inner cylinder B2 having an outer diameter substantially the same as the inner diameter of the cylinder H2, and a circumferential groove C2 is formed on the outer surface of the inner cylinder B2. The O-ring D2 is fitted in, the outer cylinder E2 is mounted on the header base so as to face the inner cylinder B2, and the pipe holding ring F2 and the release ring I are mounted facing the front end of the outer cylinder E2, and then they come out. The cap G2 that prevents this is screwed into the outer cylinder E2 to form a slot for the cylinder H2. The behavior of both when inserted will be described later.

  The header bases constituting the inner cylinders B1 and B2 are core bodies made of metal such as (PPS) resin or gun metal, and the outer cylinders E1 and E2 are formed by in-mold molding of transparent trogamide resin (CX7233) on the outer surface. It is formed. In addition, the outer cylinder E1 may be integrated with the core body by crimping or screwing.

  In the illustrated example, the trogamide resin is described as having a shape covering the root of the cylindrical body H2, but is not limited to this, and the entire length of the cylindrical body H2 as shown by a one-dot chain line. May be covered with trogamide resin (E3). By doing so, there is a protection and buffering effect of the cylindrical body H2 by PPS or the like, and furthermore, it is possible to control the degree of biting of the claws of the pipe holding ring F2.

  FIG. 5 is an enlarged view of the vicinity of the pipe holding ring F1 and the release ring I. The front end of the outer cylinder E1 has a V-shaped cusp J, and the pipe holding ring F1 has substantially the same shape as the V-shaped cusp J. V-shaped. In the illustrated example, a release ring I is mounted next to the pipe holding ring F1, and a cap G1 is screwed to cover them.

  First, in order to prevent the resin pipe P from coming off, the inner peripheral surface of the cap G1 is an inner tapered surface L facing the outer diameter side tapered surface K of the V-shaped pipe holding ring F1. Accordingly, in the inserted resin pipe P, the claws F0 of the pipe holding ring F1 bite into the outer surface, but the resin pipe P is likely to come out with its internal pressure due to the fluid flowing inside the resin pipe P. It will be a movement. However, the pipe holding ring F1 also moves in the same direction, and the tapered surfaces K and L come into contact with each other. For this reason, the pipe holding ring F1 moves in the direction of reducing the diameter inward, so that the claw F0 further bites in. This prevents the omission.

  Next, the resin pipe P is pulled out. The release ring I is a ring having a tapered surface N facing the inner diameter side tapered surface M of the V-shaped pipe holding ring F1, and the cap G1 and the resin pipe. It has a structure that can be pushed inward from between P. Therefore, by pressing the release ring I inward, the inner diameter side taper surface K of the pipe holding ring F1 and the taper surface N can be brought into contact with each other and pressed inward, so that they bite into the outer surface of the resin pipe P. The nail F0 has been removed and the resin pipe P can be pulled out.

  When the header bases X are connected to form the header Y, mutual disconnection prevention and release, that is, the relationship between the cylindrical body H2 and the pipe holding ring F2 and release ring I is the prevention and release / extraction of the resin pipe P. This is the same as in the case of, and the description is omitted here.

  Thus, in the conventional header, the outer surface of the resin pipe was used to exhibit the sealing function and the prevention function, but the present invention has changed this, and the sealing function is the inner surface of the resin pipe. The omission prevention function is performed on the outer surface of the resin pipe. Therefore, the header of the present invention is a header for conversion from the outer surface seal structure of the resin pipe to the inner surface seal structure, and prevents leakage of water by adopting this header in advance during piping work or maintenance. Measures will be taken. Of course, even if the header is replaced during maintenance, the resin pipe does not need to be replaced and is extremely economical. For this reason, the header of the present invention can be widely used as a water supply / hot water supply header.

FIG. 1 is a half cut view of a conventional one-push type joint. FIG. 2 is a half cut view of a one-push type branch joint. FIG. 3 is an exploded half cut view of the header base in the first embodiment of the present invention. FIG. 4 is a half-cut view of a finished header product using the header substrate in FIG. FIG. 5 is an enlarged view of the main part of the header base.

Explanation of symbols

A1 ... Rising flow path A2 ... Linear flow path B1, B2 ... Inner cylinder C1, C2 ... Circumferential groove D1, D2 ... O-ring E1, E2, E3 ... Outer cylinder F1, F2 ... Pipe holding ring F0 ... Pipe holding ring claw G1, G2 ... Cap H2 ... Cylinder I ... Release ring J ... Shape of front end of outer cylinder K ... Outer diameter taper surface of pipe retaining ring L ... Inner peripheral surface (taper surface) of cap
M: Tapered surface on the inner diameter side of the pipe retaining ring N: Tapered surface of the release ring P: Resin pipe X: Header base Y: Header

Claims (10)

An inner cylinder B1 which is a T-shaped header base having a straight flow path and a rising flow path formed therein, and has an outer diameter substantially the same as the inner diameter of the resin pipe P into which the tip of the rising flow path A1 is inserted. A peripheral groove C1 is formed on the outer surface of the inner cylinder B1 and an O-ring D1 is fitted. The outer cylinder E1 is mounted on the header base so as to face the inner cylinder B1, and a pipe is opposed to the front end of the outer cylinder E1. A cap G1, which prevents these slipping out after the retaining ring F1 is mounted, is formed as a resin pipe insertion opening screwed into the outer cylinder E1, and one end of the straight flow path A2 is a cylinder H2, and the other end is The tip is formed as an inner cylinder B2 having an outer diameter substantially the same as the inner diameter of the cylinder H2, and a circumferential groove C2 is formed on the outer surface of the inner cylinder B2, and an O-ring D2 is fitted into the outer cylinder B2 so as to face the inner cylinder B2. The outer cylinder E2 is the header base Wear is, the outer cylinder E2 front ends opposite to the pipe retaining ring cylindrical body cap G2 which prevents escape of these were screwed into the outer cylinder E2 after mounting the F2 H2 of spigot and without the,
The inner cylinder B1, the inner cylinder B2, and the cylinder H2 are integrally formed, and an inner diameter of the inner cylinder B2 facing the straight flow path is set so as to sandwich the rising flow path. A diameter smaller than the inner diameter of the cylinder H2 facing the linear flow path on the opposite side of the cylinder B2, and the inner cylinder B2 and the inner wall of the cylinder H2 are respectively flush with each other; T-shaped header substrate characterized by   The T-shaped header base according to claim 1, further comprising a release ring I for releasing the biting of the claw portions of the pipe holding rings F1, F2.   The T-shape according to claim 1 or 2, wherein the front ends of the outer cylinders E1 and E2 have a V-shaped point J, and the pipe holding rings F1 and F2 have substantially the same shape as the V-shaped point J. Header substrate.   4. The T-shaped header base according to claim 1, further comprising an inner tapered surface L facing the outer diameter side tapered surface K of the V-shaped pipe holding rings F 1, F 2 on the inner peripheral surfaces of the caps G 1, G 2. .   The T-shaped header base according to any one of claims 1 to 4, further comprising a tapered surface N facing the inner diameter side tapered surface M of the V-shaped pipe holding rings F1, F2 at the rear end of the release ring I.   The T-shaped header base according to any one of claims 1 to 5, wherein the outer cylinders E1 and E2 are integrally molded, and the inner cylinders B1 and B2 and the cylinder H2 are integrally molded.   A first step of mold-molding the inner cylinders B1, B2 and the cylinder H2 as defined in claims 1 to 6 with PPS resin, and a molded product obtained by the first step is a module for defining the outer shape of the header-base body. -A second step of setting in the mold, a third step of casting trogamide resin in the cavity forming the outer cylinder part, and a fourth step of taking out the header-substrate from within the mold. The manufacturing method of the T-shaped header-base | substrate which made the outer cylinder part transparent to be transparent.   The method for producing a T-shaped header-substrate according to claim 7, wherein the PPS resin is selected from Fortron 1140A1 or Fortron 1130T6 manufactured by Polyplastics.   8. The process for producing a T-shaped header-substrate according to claim 7, wherein the trogamide resin is trogamide CX7323 manufactured by Daicel Degussa.   A T-shaped header to which the T-shaped header substrate according to any one of claims 1 to 6 is connected, wherein a cylindrical body H2 at one end of the straight flow path A2 of the T-shaped header substrate is connected to an adjacent T. It is inserted into the cap G1 at the other end of the linear flow path A2 of the letter-shaped header base, and the O-ring D2 is brought into contact with the inner peripheral surface of the cylindrical body H2, and the pipe holding ring F2 is brought into contact with the outer peripheral surface of the cylindrical body H2. A header structure characterized in that T-shaped header bases are sequentially connected.

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