JP2013148143A - Joint pipe header - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint pipe header where a sealing member for a sealing plug or the like or a specific header end unit is not required.SOLUTION: A joint pipe header has a plurality of branch pipes including a resin casing into which fluids flow, and a joint part that is formed integrally with the casing on an outer circumferential surface of the casing and where a joint body is connected in one action.

Description

  The present invention relates to a pipe joint header.

  Conventionally, a pipe header having a plurality of branch pipes has been used. In such a header for piping, there is a pipe joint header in which a plurality of branch pipes having one-touch joints (joint portions) are integrally formed as equipment piping (for example, Patent Document 1). In addition, there is a pipe joint header in which a plurality of header members including branch pipes are connected to form a required number of branch pipes (for example, Patent Document 2).

  However, in the invention of Patent Document 1, it is necessary to attach a sealing plug to the branch pipe to which no pipe is connected, which takes time. Further, in the invention of Patent Document 2, a pipe joint header is formed by connecting a required number of header members, but the opening of the header member at the end is sealed with a sealing plug, or a dedicated header end Unit must be connected.

JP-A-2005-185508 JP 2004-204659 A

  The present invention has been made in consideration of the above matters, and an object thereof is to provide a pipe joint header that does not require a sealing member such as a sealing plug or a dedicated header end unit.

  The pipe joint header according to claim 1 includes a resin-made tubular body into which a fluid flows, and a joint portion that is integrally formed with the tubular body on an outer peripheral surface of the tubular body, and the tubular body is connected in one action. A plurality of branch pipes provided.

  In the pipe joint header according to the first aspect, it is possible to form a branch flow path that branches from the cylindrical body to the branch pipe only by forming a through hole in the outer peripheral surface of the cylindrical body that is the bottom of the branch pipe. Moreover, since the flow path is obstruct | occluded by the outer peripheral surface of a cylinder about the branch pipe which does not form a through-hole, sealing members, such as a sealing plug, and a header edge part unit are not required.

  Furthermore, since a plurality of branch pipes are formed in the pipe joint header, when increasing the branch flow path, it is only necessary to form a through hole in the bottom of the branch pipe, and there is no need to prepare a separate header member. . Moreover, since the branch pipe is provided with the joint part, the pipe can be connected by one action.

  The pipe joint header according to claim 2 is the pipe joint header according to claim 1, wherein a through hole is formed in at least one portion of the outer peripheral surface of the cylindrical body where the branch pipe is formed. ing.

  In the pipe joint header according to the second aspect, by forming the necessary number of through holes in the outer peripheral surface of the cylindrical body in advance, it is possible to save the user from forming the through holes.

  The pipe joint header according to claim 3 is the pipe joint header according to claim 1 or 2, wherein at least one portion of the outer peripheral surface of the cylindrical body on which the branch pipe is formed has the cylindrical body. A thin portion having a thickness thinner than other portions is formed.

  In the pipe joint header according to claim 3, since the through hole is formed in the thin portion, the through hole can be formed in a short time.

  Since the present invention is configured as described above, it is possible to provide a pipe joint header that does not require a sealing member such as a sealing plug or a dedicated header end unit.

It is a perspective view which shows the pipe joint header which concerns on embodiment of this invention. It is a sectional side view of the pipe joint header concerning the embodiment of the present invention. It is a principal part expanded sectional view which shows the branch pipe which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the shaping | molding method of the pipe joint header which concerns on embodiment of this invention. It is a principal part expanded sectional view which shows the state which has formed the through-hole in the bottom part of the branch pipe which concerns on embodiment of this invention. It is a principal part expanded sectional view which shows the state by which the pipe is connected to the branch pipe which concerns on embodiment of this invention. It is a principal part expanded sectional view which shows the modification of the pipe joint header which concerns on embodiment of this invention.

  A pipe joint header according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the pipe joint header 10 includes a main body pipe 12, a plurality of branch pipes 14 formed on the outer peripheral surface of the main body pipe 12, and a connection portion 16 formed at the end of the main body pipe 12. Has been. The branch pipe 14 and the connection part 16 are formed with a joint part 18, and the pipe 100 connected to a watering device such as a washing machine or a bathtub is connected to the joint part 18.

  As shown in FIG. 2, the main body tube 12 is a cylindrical member formed of a resin such as polybutene, and is formed by injection molding or the like. In addition, a linear flow path 34 through which a fluid such as water or hot water flows is formed inside the main body pipe 12.

  One end side of the main body tube 12 is closed, and the other end side is opened to form a connection portion 16. A joint portion 18 including an O-ring 20, a collet 22, and a cap 24 is formed in the connection portion 16. In addition, since the structure of the connection part 16 and the joint part 18 is the same as that of the joint part 18 formed in the branch pipe 14 mentioned later, detailed description is abbreviate | omitted here.

  A plurality of branch pipes 14 are formed on the outer peripheral surface of the main body pipe 12 at equal intervals along the axial direction of the main body pipe 12. The branch pipe 14 is a cylindrical body that protrudes in the radial direction of the main body pipe 12 and is formed integrally with the main body pipe 12. In the present embodiment, five branch pipes 14 are formed, but the number of branch pipes 14 is appropriately set depending on the installation environment of the pipe joint header 10 or the like. For example, when connecting pipes from many watering devices, the pipe joint header 10 in which more branch pipes 14 are formed is used.

  A through hole 26 is formed in the bottom 14A of the four branch pipes 14 excluding the leftmost branch pipe 14L among the five branch pipes 14. In addition, a joint portion 18 including an O-ring 20, a collet 22, and a cap 24 is provided on the upper part of the four branch pipes 14, and a pipe 100 for water supply, hot water supply, or drainage is connected (see FIG. 6).

  As shown in FIG. 3, the branch pipe 14 includes a first tube portion 28 and a second tube portion 30 having a larger diameter than the first tube portion 28. Further, a step portion 32 is formed on the inner wall surface of the branch pipe 14 between the first tube portion 28 and the second tube portion 30. In addition, an annular protrusion 28 </ b> A projecting outward in the radial direction is formed on the upper portion of the first tube portion 28.

  An annular O-ring 20 constituting the joint portion 18 is fitted into the second cylindrical portion 30, and the O-ring 20 is locked and positioned by a step portion 32. An annular collet 22 is fitted above the O-ring 20, and the collet 22 is in contact with the O-ring 20. On the inner peripheral surface of the collet 22, a plurality of claw portions 22A protruding radially inward are formed along the circumferential direction.

  A cap 24 is provided on the outer peripheral surface of the second cylindrical portion 30. The cap 24 is a cylindrical member having a thread groove formed on the inner peripheral surface thereof, and is fixed by being screwed into a male screw portion 30 </ b> A formed on the outer peripheral surface of the second cylindrical portion 30. Further, the upper end portion 24A of the cap 24 projects radially inward to prevent the collet 22 from being pulled out.

  A through hole 26 having a diameter smaller than that of the first tube portion 28 is formed in the center portion of the bottom portion 14 </ b> A of the branch pipe 14. Through this through hole 26, the flow path 34 of the main body pipe 12 and the branch flow path 36 of the branch pipe 14 communicate with each other.

  The flow rate of the fluid flowing into the branch flow path 36 can be adjusted by changing the hole diameter of the through hole 26. However, since the end of the pipe 100 is locked by the bottom 14A of the branch pipe 14, the bottom 14A is fixed to the bottom 14A. It is desirable to leave a part. Further, the shape of the through hole 26 is not particularly limited. For example, it may be a polygon.

  Next, an example of a method for forming the pipe joint header 10 according to the present embodiment will be described.

  As shown in FIG. 4, when the pipe joint header 10 is formed by injection molding, a resin that is a raw material for the pipe joint header 10 is injected at a high temperature into a mold 38 composed of a plurality of parts. Thereafter, the mold 38 is cooled while pressure is applied, and the resin in the mold 38 is hardened to form the pipe joint header 10.

  The mold 38 includes an upper mold 38A that moves to the front side in the vertical direction of the paper surface, a lower mold 38B (not shown) that moves in the vertical direction of the paper surface in a pair with the upper mold 38A, a branch pipe mold 38C, and a main body tube mold. 38D. When the pipe joint header 10 is taken out from the mold 38, first, the upper mold 38A that is in contact with the outer peripheral surface of the main body pipe 12 and the outer peripheral surface of the branch pipe 14 is pulled out to the front side in the vertical direction of the paper surface and removed. Next, the branch pipe mold 38C that is in contact with the inner peripheral surface of the branch pipe 14 is pulled upward in the drawing and removed.

  After removing the upper mold 38A and the branch pipe mold 38B, the pipe joint header 10 is taken out from the lower mold 38B by pulling out the main pipe 38D that is in contact with the inner peripheral wall of the main pipe 12. Thereafter, the gate portion 40 that becomes a flow path for feeding the resin into the mold 38 is cut off by a nipper or the like. In addition, although it shape | molded by injection molding in this embodiment, if a method which can shape | mold the main body pipe | tube 12 and the branch pipe 14 integrally, a shaping | molding method will not be restrict | limited. For example, it may be formed by hollow molding.

  Moreover, in shaping | molding of the pipe joint header 10 which concerns on this embodiment, although the through-hole 26 is not formed, you may form the through-hole 26 in the bottom part 14A of some branch pipes 14 (refer FIG. 2). In this case, a part of the branch pipe mold 38C in contact with the bottom 14A of the branch pipe 14 is extended until it reaches the main body pipe mold 38D, and the through hole 26 is formed so that the resin does not flow.

  Next, a method for connecting a pipe to the pipe joint header 10 according to the present embodiment will be described.

  When connecting a pipe to the pipe joint header 10 injection-molded by the mold 38 of FIG. 4, it is necessary to form the through hole 26 in the bottom portion 14A of the branch pipe 14 to which the pipe is connected.

  As shown in FIG. 5, a drill 42 is inserted into the branch pipe 14 to which the pipe is connected, and the bottom portion 14 </ b> A is cut to form the through hole 26. At this time, the cutting location can be easily positioned by holding the pipe joint header 10 with a jig (not shown).

  In the present embodiment, the through hole 26 is formed by the drill 42, but the through hole 26 may be formed by other methods. For example, the through hole 26 may be formed by cutting the bottom portion 14A with a horuseau or the like.

  When the bottom portion 14A of the branch pipe 14 is cut by the drill 42, the cut pieces of the resin are scattered inside the main body pipe 12, so that water is poured into the main body pipe 12 for cleaning. Thereafter, as shown in FIG. 3, the O-ring 20 and the collet 22 are fitted into the branch pipe 14 in which the through hole 26 is formed, and the cap 24 is attached.

  As shown in FIG. 6, when connecting the pipe 100 to the branch pipe 14, it is desirable to attach the support sleeve 102 to the pipe 100 in advance. The support sleeve 102 is a cylindrical member made of resin, and has an outer diameter that is substantially the same as the inner diameter of the pipe 100. A flange portion 102 </ b> A extending in the radial direction is formed on one end side of the support sleeve 102. The outer diameter of the flange portion 102 </ b> A is formed to be the same as or slightly smaller than the outer diameter of the pipe 100.

  The above-described support sleeve 102 is inserted into the pipe 100, and the tip portion of the pipe 100 and the flange portion 102A are brought into contact with each other. Thereafter, the pipe 100 is inserted into the branch pipe 14. At this time, the tip of the branch pipe 14 is maintained in a perfect circle by the support sleeve 102, so that the pipe 100 can be smoothly inserted into the branch pipe 14.

  The pipe 100 is inserted into the branch pipe 14 until the flange portion 102A of the support sleeve 102 reaches the bottom portion 14A, and the connection of the pipe 100 is completed. In this state, the O-ring 20 seals the gap between the pipe 100 and the branch pipe 14 so that the fluid flowing through the branch flow path 34 does not leak. Further, since the claw portion 22A formed in the collet 22 bites into the pipe 100, when the pipe 100 is pulled out from the branch pipe 14, the claw portion 22A further bites into the pipe 100 and suppresses the extraction of the pipe 100. . In this way, the pipe 100 can be connected to the branch pipe 14 with one action.

  Next, when a new pipe 100 is connected to the pipe joint header 10 due to an increase in the number of water-circulating devices (for example, when the pipe 100 is connected to the branch pipe 14A in FIG. 2), the pipe joint header 10 is temporarily connected. All the pipes 100 are removed, and as described above, the through hole 26 is formed in the bottom of the branch pipe 14A with a drill, a horusor or the like. Thereafter, the branch flow path 34 can be formed simply by washing and attaching the O-ring 20, the collet 22 and the cap 24 to the branch pipe 14A.

  In the present embodiment, the five branch pipes 14 are formed in the same direction with respect to the main body pipe 12, but may be formed in different directions. A plurality of branch pipes 14 may be formed in the circumferential direction of the main body pipe 12. In this case, the branch pipe 14 to be used can be selected according to the direction in which the pipe 100 is connected.

  In the present embodiment, the inner diameters of the five branch pipes 14 are formed with the same dimensions, but the inner diameter dimensions of some of the branch pipes 14 may be formed with different dimensions. In this case, pipes 100 having different diameters can be connected to one pipe joint header 10.

  In the embodiment of the present invention, the bottom portion 14A of the branch pipe 14 is planar. For example, as shown in FIG. 7, a recess 44 is formed in the bottom portion 14A of the branch pipe 14 at the stage of injection molding. Also good. By forming such a recess 44, the partition wall that separates the flow path 34 and the branch flow path 36 becomes a thin portion 12 </ b> A that is thinner than the thickness of the main body tube 12. For this reason, the through-hole 26 can be formed easily.

  In FIG. 7, the recess 44 is formed in a concave shape from the outer peripheral surface of the main body tube 12, but may be formed in a concave shape from the inner peripheral surface of the main body tube 12. In this case, since it becomes difficult to form the concave portion 44 by injection molding, the concave portion 44 may be formed by another molding method or by secondary processing after injection molding.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect. For example, the outer peripheral surface of the main body pipe 12 in which the branch pipe 14 is formed may be formed thick.

10 Pipe joint header 12 Body pipe (tubular body)
12A Thin section 12A
14 Branch pipe 18 Joint part 26 Through hole

Claims (3)

A plastic cylinder into which the fluid flows,
A plurality of branch pipes formed integrally with the cylindrical body on the outer peripheral surface of the cylindrical body and provided with joint portions to which the tubular body is connected in one action;
Pipe fitting header with.   The pipe joint header according to claim 1, wherein a through hole is formed in at least one place on the outer peripheral surface of the cylindrical body where the branch pipe is formed.   The pipe joint header according to claim 1 or 2, wherein a thin portion having a thickness smaller than that of other portions of the cylindrical body is formed in at least one portion of the outer peripheral surface of the cylindrical body where the branch pipe is formed. .

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