JP2020037983A - Piping structure - Google Patents

Abstract

To provide a piping structure capable of suppressing twisting of pipe ends by easily and efficiently performing angle adjustment when connecting pipe ends of a first joint having crossing pipe ends and a pipe end of the other pipe or joint by a second joint arranged on outer peripheries of the pipe ends.SOLUTION: A piping structure 100 includes: a first joint 10 formed by crossing at least one of a plurality of pipe ends with the other pipe end; a resin pipe 20; and a second joint 30 which is arranged on outer peripheries of pipe ends 11 of the first joint 10 and a pipe end 21 of the resin pipe 20 and connects the first joint 10 and the resin pipe 20. The piping structure further includes: a plurality of first belt-like sections 12 which are arranged at intervals in a circumferential direction on outer peripheral surfaces of the pipe ends 11 and extend in an axial direction to the outside of the second joint 30; and a plurality of second belt-like sections 22 which are arranged at intervals in the circumferential direction on the outer peripheral surface of the resin pipe 20 and extend in the axial direction to the outside of the second joint 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a piping structure formed by connecting pipe ends.

  In recent years, a resin pipe (pipe main body) formed of a thermoplastic resin (for example, polyvinyl chloride, ABS resin, etc.) has been used for gas pipes instead of metal because it has earthquake resistance, flexibility, and corrosion resistance. Widely used for water pipes, drain pipes, etc.

  In such a connection of the resin pipe, for example, the end of the first pipe and the end of the second pipe are opposed to each other, and the pipe end of the first pipe (the part extending from the end). It is common to arrange and fix a joint on the outer peripheral surface of the pipe end of the second pipe.

  On the other hand, it is difficult to connect a resin tube made of an olefin resin such as a polyethylene resin or a polypropylene resin with an adhesive. Therefore, for example, connection by an electric fusion method is common, and an electric fusion joint is widely used as a means for efficiently realizing the electric fusion method (for example, see Patent Document 1).

  Specifically, the electric fusion joint includes a joint body made of a thermoplastic resin, a heating wire embedded in the fusion interface on the inner peripheral surface side of the joint body, and an outer periphery of the joint body connected to the heating wire and And a connector mounting portion (current-carrying portion) arranged on the surface.

  Then, the pipe end of the first pipe and the pipe end of the second pipe are respectively inserted into receptacles provided at both ends of the joint body of the electric fusion joint, and the power supply unit supplies power to the power supply unit by heating. To generate heat. As a result, the resin of the portion located around the heating wire on the outer peripheral surface of the pipe end of the first pipe and the second pipe and the inner circumferential surface of the receptacle is melted, and the pipe ends of the first pipe and the second pipe are melted. The part and the electric fusion joint are connected to form an integrated piping structure.

  Such a piping structure is not limited to the case where it is buried underground, and has been widely applied to general apartment buildings and the like. In addition, in order to efficiently apply the method to a prefabricated construction method or the like, a piping structure including a joint with a branch pipe using, for example, a joint with a branch pipe (electric fusion joint) is disclosed (for example, Patent Document 1). 2).

JP 2014-199128 A JP 2006-105389 A

However, the present invention is not limited to the joint with a branch pipe (electro-fusion joint). In the case where the pipe end of the first joint and the pipe end of another pipe or joint are connected by a second joint disposed on the outer periphery of the pipe end, the first joint and other pipes are connected. Alternatively, the joint may be twisted around the axis.
That is, for example, where one pipe end of the first joint is to be connected to the pipe end of the other pipe in the correct posture, the one pipe end is not connected to the correct posture. In a state where the pipe or the joint is rotated in the circumferential direction (twisted state), there is a possibility that the pipe or the joint is connected to the pipe end of another pipe.
On the other hand, when such a piping structure is configured, it is not easy to adjust the angle for suppressing the twist of the pipe ends around the axis, and the work requires skill.

  The present invention has been made in view of such circumstances, and a pipe end of a first joint where at least one pipe end crosses another pipe end, and a pipe end of another pipe or joint. When connecting the parts with the second joint disposed on the outer periphery of these pipe ends, it is possible to easily and efficiently adjust the angle and suppress the pipe ends from twisting around the axis. It is intended to provide a simple piping structure.

In order to solve the above problems, the present invention proposes the following means.
The invention according to claim 1 is a piping structure, wherein the first joint has a plurality of pipe ends, and at least one of the plurality of pipe ends crosses another pipe end. A pipe or joint having a pipe end connected to the pipe end of the first joint; an outer periphery of the pipe end of the first joint and a pipe end of a pipe or joint connected to the first joint; And a second joint that connects a pipe end of the first joint and a pipe end of the pipe or the joint, wherein a pipe end of the first joint and the pipe or the joint are provided. At least one of the connection portions to be connected is provided on the outer peripheral surface of the pipe end of the first joint at a circumferential interval with a plurality of first joints extending axially outward of the second joint. A belt-shaped portion and a plurality of pipes or pipes which are arranged on the outer peripheral surface of a pipe end portion of the pipe at an interval in a circumferential direction and extend axially outward of the second joint. Characterized in that it comprises a second strip-shaped portion of the.

According to the piping structure of the present invention, at least one of the connection portions where the pipe end of the first joint and the pipe or the pipe end of the joint are connected is formed on the outer peripheral surface of the pipe end of the first joint. A plurality of first belt-shaped portions which are arranged at intervals in the circumferential direction and extend axially outward of the second joint, and are arranged at intervals in the circumferential direction on an outer peripheral surface of a pipe or a pipe end of the joint; Since a plurality of second belt-like portions extending in the axial direction are provided outside the second joint, the first belt-like portion and the second belt-like portion can be viewed by looking at the relative positions in the circumferential direction. (1) It is possible to visually recognize a state where the joint and the pipe or the joint are opened around the axis (twisted state).
As a result, when the pipe end of the first joint and the pipe end of another pipe or joint are connected by the second joint, the angle is easily and efficiently adjusted so that the pipe ends are around the axis. Can be suppressed.
Here, the pipe end refers to a first joint, a joint connected to the first joint, or a straight pipe extending from a pipe end (opening) of a pipe.

  The invention according to claim 2 is the piping structure according to claim 1, wherein the first belt-shaped portion is formed to have a length extending from the second joint outward to 10 mm or more and 150 mm or less. It is characterized by being.

  According to the piping structure of the present invention, since the length of the first band-shaped portion extending outward from the second joint is formed to be 10 mm or more and 150 mm or less, the axis of the first band-shaped portion with respect to the second band-shaped portion. The surrounding twist (relative position in the circumferential direction) can be easily and clearly cored.

  The invention according to claim 3 is the piping structure according to claim 1 or 2, wherein the first joint, a pipe or a joint connected to the first joint, and the second joint are made of an olefin-based resin. The first joint and the pipe or the joint are formed and fused to the second joint.

  ADVANTAGE OF THE INVENTION According to the piping structure which concerns on this invention, since the 1st joint formed by olefin resin and the piping or joint connected with a 1st joint are connected by a 2nd joint, piping structure easily and efficiently. Can be configured.

  ADVANTAGE OF THE INVENTION According to the piping structure which concerns on this invention, when constructing a piping structure, the twist about the axis line of the pipe end parts connected can be adjusted easily.

1 is a schematic configuration illustrating an example of a piping structure according to a first embodiment of the present invention. It is sectional drawing explaining an example of the schematic structure of the connection part which concerns on the piping structure which concerns on 1st Embodiment. It is a schematic structure figure explaining the piping structure concerning a 2nd embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning a 3rd embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning a 4th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning a 5th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning a 6th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning a 7th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning the 1st modification of a 7th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning the 2nd modification of a 7th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning the 3rd modification of a 7th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning an 8th embodiment of the present invention. It is a schematic structure figure explaining the 1st modification of the 1st joint applied to the piping structure concerning an 8th embodiment of the present invention. It is a schematic structure figure explaining the piping structure concerning the 2nd modification of an 8th embodiment of the present invention.

<First embodiment>
Hereinafter, a piping structure according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic configuration diagram illustrating a piping structure according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a schematic configuration of a connection portion according to the piping structure. In the drawing, reference numeral 100 denotes a piping structure, reference numeral 10 denotes a T-shaped joint (first joint), reference numeral 11 denotes a pipe end of the T-shaped joint, reference numeral 20 denotes a resin pipe (piping), and reference numeral 21 denotes a resin pipe. Reference numeral 30 denotes an electro-fusion joint (second joint).
Here, the pipe end refers to a first joint, a joint connected to the first joint, or a straight pipe extending from a pipe end (opening) of a pipe.

The piping structure 100 includes, for example, a T-joint (first joint) 10, three resin pipes 20, and three electric fusion joints (second joints) 30, as shown in FIG.
In the first embodiment, the T-joint (first joint) 10, the resin pipe 20, and the electric fusion joint (second joint) 30 are made of, for example, polyethylene resin (olefin-based resin).
The T-joint (first joint) 10 has a configuration in which, for example, a pipe end 11 formed by extrusion molding is integrally connected to a T-joint body formed by injection molding.

As shown in FIG. 1, the T-shaped joint (first joint) 10 includes a pipe end 11 and a first band-shaped portion 12.
The tube end 11 includes, for example, a tube end 111, a tube end 112, and a tube end 113 that extend linearly from the tube end (opening). In this embodiment, the outer diameters of the pipe end 111, the pipe end 112, and the pipe end 113 are formed to have the same diameter.
Further, a first band-shaped portion 12 is formed on the outer peripheral surface of the tube end 111, the tube end 112, and the tube end 113.

The tube end 111 is formed along the first axis O1.
The tube end 112 and the tube end 113 are formed on the same line along the second axis O2.
In addition, the first axis O1 and the second axis O2 are arranged orthogonal to each other. That is, the tube end 111 is formed orthogonal to the tube end 112 and the tube end 113.

The first belt-shaped portion 12 is formed along the first axis O1 or the second axis O2 on the respective tube ends 11 by, for example, extruding and printing resins having different colors.
In addition, four first belt-shaped portions 12 are formed on the outer periphery of each tube end 11 and are arranged at 90 ° intervals in the circumferential direction. In this embodiment, for example, it is formed over the entire length of the pipe end 11 from the T-shaped joint body to the pipe end (opening).

In addition, the length of the first band portion 12 can be set arbitrarily, but the length L12 of the electrofusion joint (second joint) 30 extending outward is, for example, not less than 10 mm and not more than 150 mm. It is preferred that there be.
Further, a portion of the first belt-shaped portion 12 located inside the electrofusion joint 30 is scraped off with a scraper or the like in order to stably fuse with the electrofusion joint 30.
In addition, the length L11 from the pipe end (opening) where the first belt-shaped portion 12 is formed corresponds to the length located inside the electrofusion joint 30 (for example, the length L11 = 40 mm or more). It may be formed economically by doing.

As shown in FIG. 1, the resin pipe (pipe) 20 includes a pipe end 21 and a second strip 22.
The tube ends 21 are formed to extend linearly from the tube ends (openings).
The tube ends 21 of the resin pipes 20 are formed to have the same outer diameter as the tube ends 111, 112, and 113. The tube end 21 is arranged along the first axis O1 or the second axis O2 so as to face the tube ends (openings) of the tube ends 111, 112, and 113. .

The second belt-like portion 22 is formed along the first axis O1 or the second axis O2 on each tube end 21 by, for example, extruding a resin having different printing or color together.
Further, four second belt-like portions 22 are formed on the outer periphery of each tube end 21 and are arranged at 90 ° intervals in the circumferential direction.
In addition, the length of the second band-shaped portion 22 can be set arbitrarily. For example, the length L22 extending outward of the electrofusion joint (second joint) 30 is set to 10 mm or more. Is more preferable, and it is more preferable that it is 150 mm or less.
Further, a portion of the second belt-shaped portion 22 located inside the electrofusion joint 30 is scraped off with a scraper or the like in order to stably fuse with the electrofusion joint 30.
Further, the length L21 from the pipe end (opening) where the second belt-shaped portion 22 is formed is made to correspond to the length located inside the electrofusion joint 30 (for example, the length L21 is equal to or greater than 40 mm). It may be formed economically by doing so.

As shown in FIG. 2, the electric fusion joint (second joint) 30 includes, for example, a joint main body 31, a stopper 32, a heating wire 33, a covering 34, and a connector attaching portion 35. .
The joint main body 31 includes a first receiving portion 31A and a second receiving portion 31B.

The first receiving portion 31A has an inner diameter corresponding to the outer diameter of the tube end portion 11 so that the tube end portion 11 is inserted.
The second receiving portion 31B has an inner diameter corresponding to the outer diameter of the tube end 21 so that the tube end 21 is inserted.
Further, the first receiving portion 31A and the second receiving portion 31B are arranged linearly with each other along the first axis O1 or the second axis O2.

  The stopper 32 is formed to protrude radially inward between the first receiving portion 31A and the second receiving portion 31B. The pipe end 11 and the pipe end 21 are configured to be positioned at predetermined positions in the directions of the first axis O1 and the second axis O2 in the joint main body 31.

  The heating wire 33 is covered with the covering body 34 and is exposed along the first axis O1 or the second axis O2 along the first axis O1 or the second axis O2 so as to be exposed inside the first receiving portion 31A and the second receiving portion 31B of the joint body 31. Is spirally wound on the inner peripheral side of. The heating wire 33 heats and melts the pipe end 11 and the second connection pipe 21 to fuse the outer peripheral surfaces of the pipe end 11 and the second connection pipe 21 to the inner peripheral surface of the joint body 31. It has become.

  The covering body 34 is formed of, for example, a polyethylene resin, and by covering the heating wire 33 with the covering body 34, the fluid flowing in the joint body 31 prevents the heating wire 33 from being rusted or damaged.

  Then, the tube end 11 is inserted into the first receiving portion 31A, the tube end 21 is inserted into the second receiving portion 31B, and the heating wire 33 is energized to generate heat. By melting the inner peripheral surface of the second receiving portion 31B and the outer peripheral surface of the tube end 111 and the tube end 21, the electric fusion joint 30 is connected to the tube end 11 and the tube end 21. I have.

According to the piping structure 100 according to the first embodiment, the pipe end 11 of the T-shaped joint (first joint) 10 and the pipe end 21 of the pipe 20 are connected by the electric fusion joint (second joint) 30. At the time of connection, the angle can be easily and efficiently adjusted to prevent the pipe end 11 and the pipe end 21 from being twisted around the first axis O1 or the second axis O2.
As a result, the tube end 111 of the T-shaped joint (first joint) 10 can be accurately positioned at a predetermined position around the tube end 112 and the second axis O2 of the tube end 112.

  Further, according to the piping structure 100, since the length of the first band-shaped portion 12 extending outward from the electrofusion joint (second joint) 30 is formed to be 10 mm or more and 150 mm or less, the first band-shaped portion is formed. The torsion (relative position in the circumferential direction) about the first axis O1 and the second axis O2 with respect to the second band-shaped portion 22 of the twelve can be easily and clearly set as a nucleus.

  Further, according to the piping structure 100, since the T-shaped joint 10 and the resin pipe 20 are connected by the electric fusion joint 30, the piping structure can be easily and efficiently formed.

<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 3 is a schematic configuration diagram illustrating a piping structure according to a second embodiment of the present invention. In FIG. 3, reference numeral 10A denotes a T-shaped joint (first joint).

  The piping structure 200 includes, for example, a T-shaped joint (first joint) 10A, a resin pipe 20, and an electric fusion joint (second joint) 30, as shown in FIG.

As shown in FIG. 3, the T-shaped joint (first joint) 10 </ b> A includes, for example, a pipe end 11 and a first strip 12.
The tube end 11 includes, for example, a tube end 111A, a tube end 112, and a tube end 113 extending linearly from the tube end (opening). That is, a tube end 111A is provided instead of the tube end 111 according to the first embodiment.
In this embodiment, the outer diameter of the tube end 111A is smaller than the outer diameters of the tube end 112 and the tube end 113.

The resin pipe (pipe) 20 and the electric fusion joint (second joint) 30 connected to the pipe end 111A are formed to have dimensions corresponding to the outer diameter of the pipe end 111A.
Further, a first band-shaped portion 12 is formed on the outer peripheral surface of the tube end 111A, the tube end 112, and the tube end 113.
Other configurations are the same as those of the first embodiment.

<Third embodiment>
Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a schematic configuration diagram illustrating a piping structure according to a third embodiment of the present invention. In FIG. 3, reference numeral 300 indicates a piping structure, and reference numeral 10B indicates a T-shaped joint (first joint).

As shown in FIG. 4, the piping structure 300 includes, for example, a T-shaped joint (first joint) 10B, a resin pipe 20, and an electric fusion joint (second joint) 30.
As shown in FIG. 4, the T-shaped joint (first joint) 10 </ b> B includes, for example, a pipe end 11 and a first strip 12.

The tube end 11 includes, for example, a tube end 111B, a tube end 112, and a tube end 113 extending linearly from the tube end (opening). That is, a tube end 111B is provided instead of the tube end 111A according to the second embodiment.
In this embodiment, the outer diameter of the tube end 111B is smaller than the outer diameters of the tube end 112 and the tube end 113. A flange 13 is formed at the pipe end of the pipe end 111B.

Further, the first belt-shaped portion 12 is not formed at the tube end 111B, but is formed at the tube end 112 and the tube end 113.
In addition, the resin pipe 20 is configured to be connected to the pipe end 112 and the pipe end 113 by an electric fusion joint (second joint) 30.
Other components are the same as those of the second embodiment.

<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a schematic configuration diagram illustrating a piping structure according to a fourth embodiment of the present invention. In FIG. 5, reference numeral 400 denotes a piping structure, and reference numeral 40 denotes a T-shaped joint (first joint).

As shown in FIG. 5, the piping structure 400 includes, for example, a T-shaped joint (first joint) 40, a resin pipe 20, and an electric fusion joint (second joint) 30.
As shown in FIG. 5, the T-shaped joint (first joint) 40 includes, for example, a pipe end 11 and a first band-shaped portion 12.

The tube end 11 includes, for example, a tube end 111B, a tube end 112, and a tube end 114 extending linearly from the tube end (opening). That is, a tube end 114 is provided instead of the tube end 113 according to the third embodiment.
As shown in FIG. 5, the pipe end 114 has a pipe end receiving port into which the pipe 20A is inserted.
In this embodiment, the inner diameter of the tube end 114 is, for example, the same size as the outer diameter of the tube end 112.

Further, the first belt-shaped portion 12 is not formed on the tube end 111B and the tube end 114, but is formed only on the tube end 112.
Further, the resin pipe 20 is configured to be connected to the pipe end 112 by an electric fusion joint (second joint) 30.
Other configurations are the same as those of the third embodiment.

<Fifth embodiment>
Next, a fifth embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a schematic configuration diagram illustrating a piping structure according to a fifth embodiment of the present invention. In FIG. 6, reference numeral 50 denotes a Y-shaped joint (first joint).

As shown in FIG. 6, the piping structure 500 includes, for example, a Y-shaped joint (first joint) 50, a resin pipe 20, and an electric fusion joint (second joint) 30.
As shown in FIG. 6, the Y-joint (first joint) 50 includes, for example, a pipe end 51 and a first belt-shaped portion 12.

The tube ends 51 extend linearly from the tube ends (openings), for example, and are formed in three directions along a first axis O51, a second axis O52, and a third axis O53.
In addition, the first axis O51, the second axis O2, and the third axis O53 intersect with each other, and at the intersection, about 120 ° around an axis orthogonal to the first axis O51, the second axis O2, and the third axis O53. They are arranged at intervals. That is, the three tube ends 51 are configured to intersect with each other at an interval of 120 °.

The first belt-shaped portion 12 is formed at each tube end 51 along a first axis O51, a second axis O52, and a third axis O532.
In addition, four first belt-shaped portions 12 are formed on the outer periphery of each pipe end 51 and are arranged at 90 ° intervals in the circumferential direction.
The length of the first belt-shaped portion 12 can be set arbitrarily. For example, the length L12 of the electrofusion joint (second joint) 30 extending outward is 10 mm or more and 150 mm or less. It is preferred that there be.

Further, the resin pipe 20 is configured to be connected to each pipe end 51 by an electric fusion joint (second joint) 30.
Other configurations are the same as those of the first embodiment.

<Sixth embodiment>
Next, a sixth embodiment of the present invention will be described with reference to FIG.
FIG. 7 is a schematic configuration diagram illustrating a piping structure according to a sixth embodiment of the present invention. In FIG. 7, reference numeral 600 denotes a piping structure, reference numeral 10C denotes a T-shaped joint (first joint), and reference numeral 10D denotes a T-shaped joint (other joint).

  As shown in FIG. 7, the piping structure 600 includes, for example, a T-joint (first joint) 10C, a T-joint (other joint) 10D, a resin pipe 20, and an electric fusion joint (second joint). 30. Specifically, in the first embodiment, a T-shaped joint (first joint) 10C is arranged in place of the T-shaped joint (first joint) 10, and the pipe end 112 of the T-shaped joint (first joint) 10 is arranged. A T-shaped joint (first joint) 10 </ b> D is arranged instead of the resin pipe 20 connected to.

As shown in FIG. 7, the T-shaped joint (first joint) 10 </ b> C includes a pipe end 11 and a first strip 12.
The tube end 11 includes, for example, a tube end 111C, a tube end 112, and a tube end 113 extending linearly from the tube end (opening).
The tube end 111C is not connected to the resin pipe 20 by, for example, an electric fusion joint (second joint) 30.
In this embodiment, the outer diameters of the tube end 112 and the tube end 113 are formed to have the same diameter. Further, a first band-shaped portion 12 is formed on the outer peripheral surface of the tube end 112 and the tube end 113.
In the sixth embodiment, the T-joint (first joint) 10C and the T-joint (first joint) 10D are made of, for example, polyethylene resin (olefin-based resin).

The tube end 111C is formed along the first axis O1.
The tube end 112 and the tube end 113 are formed on the same line along the second axis O2.
In addition, the first axis O1 and the second axis O2 are arranged orthogonal to each other. That is, the tube end 111C is formed orthogonal to the tube end 112 and the tube end 113.

As shown in FIG. 7, the T-shaped joint (other joint) 10D includes a pipe end portion 11 and a first band-shaped portion 12, and the specific structure is a T-shaped joint (first joint) 10C. It has the same configuration.
Other configurations are the same as those of the first embodiment, and therefore, the same reference numerals are given and the description is omitted.

<Seventh embodiment>
Next, a seventh embodiment of the present invention will be described with reference to FIG.
FIG. 8 is a schematic configuration diagram illustrating a piping structure according to a seventh embodiment of the present invention.
8, reference numeral 700 denotes a piping structure, reference numeral 70 denotes an elbow joint (first joint), and reference numeral 71 denotes a pipe end.

  As shown in FIG. 8, the piping structure 700 includes, for example, an elbow joint (first joint) 70, a resin pipe 20, and an electric fusion joint (second joint) 30. The resin pipe 20 is connected to the pipe ends 71 on both sides of the elbow joint (first joint) 70 by an electric fusion joint (second joint) 30.

As shown in FIG. 8, the elbow joint (first joint) 70 includes a pipe end 71, a curved pipe 75, and the first strip 12.
The pipe end 71 includes, for example, a pipe end 711 and a pipe end 712 that extend linearly from the pipe end (opening).
The elbow joint (first joint) 70 is formed of, for example, a polyethylene resin (olefin-based resin).
The elbow joint (first joint) 70 has a configuration in which, for example, a tube end portion 71 formed by extrusion molding is integrally connected to a curved tube portion 75 formed by injection molding.

The tube end 711 is formed along a first axis O71, and the tube end 712 is formed along a second axis O72.
The first axis O <b> 1 and the second axis O <b> 2 are arranged orthogonal to each other, and are configured to intersect in the curved tube portion 75. That is, the pipe end 711 is formed so as to be orthogonal to the pipe end 712.

The outer diameters of the pipe end 711 and the pipe end 712 are formed to have the same diameter.
The first band-shaped portion 12 is formed on the outer peripheral surface of the pipe end 711 and the pipe end 712 over the entire length from the elbow 75 toward the pipe end (opening).

The resin pipe (pipe) 20 has a pipe end 21 having the same outer diameter as the pipe end 711 and the pipe end 712. The tube end 21 is disposed along the first axis O1 or the second axis O2 so as to face the tube ends (openings) of the tube ends 711 and 712.
Other configurations are the same as those of the first embodiment.

<Seventh Embodiment (First Modification)>
Next, a first modification of the seventh embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a schematic configuration diagram illustrating a piping structure according to a first modification of the seventh embodiment.
9, reference numeral 700A denotes a piping structure, reference numeral 70A denotes an elbow joint (first joint), and reference numeral 71A denotes a pipe end.

  As shown in FIG. 9, the piping structure 700A includes, for example, an elbow joint (first joint) 70A, a resin pipe 20, and an electric fusion joint (second joint) 30. The resin pipe 20 is connected to the pipe ends 71 on both sides of the elbow joint (first joint) 70A by an electric fusion joint (second joint) 30.

  As shown in FIG. 9, the elbow joint (first joint) 70A includes a pipe end 71A, a curved pipe part 75, and a first belt-shaped part 12.

  The difference between the tube end 71A and the tube end 71 according to the seventh embodiment is that the tube end 71A is longer than the tube end 711 and the tube end 712 in place of the tube end 711 and the tube end 712. This is a point provided with a pipe end 711A and a pipe end 712A. Other configurations are the same as those of the seventh embodiment.

<Seventh embodiment (second modification)>
Next, a second modification of the seventh embodiment of the present invention will be described with reference to FIG.
FIG. 10 is a schematic configuration diagram illustrating a piping structure according to a second modification of the seventh embodiment.
In FIG. 10, reference numeral 700B denotes a piping structure, reference numeral 70B denotes an elbow joint (first joint), and reference numeral 71B denotes a pipe end.

  As shown in FIG. 10, the piping structure 700B includes, for example, an elbow joint (first joint) 70B, a resin pipe 20, and a T-shaped electric fusion joint (second joint) 130.

As shown in FIG. 10, the elbow joint (first joint) 70 </ b> B includes a pipe end 71 </ b> B, a curved pipe part 75, and a first belt-shaped part 12.
The pipe end 71B includes a pipe end 711B formed along the first axis O71 and a pipe end 712B formed along the second axis O72.

  The T-shaped electric fusion joint (second joint) 130 is, for example, a branch pipe formed along the axis O73 at a central portion in the axial direction of the electric fusion joint (second joint) 30 according to the first embodiment. Is formed. The axis O73 is arranged orthogonally to the first axis O71 (intersection angle 90 °). Note that the intersection angle of the axis O74 may be other than 90 °. The other parts are the same as those of the electric fusion joint (second joint) 30 and will not be described.

The resin pipe 20 is connected to the pipe end 711B (71B) of the elbow joint (first joint) 70B by a T-shaped electric fusion joint (second joint) 130.
The resin pipe 20 is connected to the pipe end 712 </ b> B (71 </ b> B) by an electric fusion joint (second joint) 30. Other configurations are the same as those of the seventh embodiment.

<Seventh embodiment (third modification)>
Next, a third modification of the seventh embodiment of the present invention will be described with reference to FIG.
FIG. 11 is a schematic configuration diagram illustrating a piping structure according to a third modification of the seventh embodiment.
In FIG. 11, reference numeral 700C denotes a pipe structure, reference numeral 70C denotes a 90 ° bend joint (first joint), and reference numeral 71C denotes a pipe end.

  As shown in FIG. 11, the piping structure 700C includes, for example, a 90 ° bend joint (first joint) 70C, a resin pipe 20, and an electric fusion joint (second joint) 30.

As shown in FIG. 11, the 90 ° bend joint (first joint) 70C includes, for example, a pipe end 71C, a curved pipe 75, a straight pipe 76, and a first belt-shaped section 12.
The pipe end 71C includes a pipe end 711C formed along the first axis O71 and a pipe end 712C formed along the second axis O72. Further, the straight pipe portion 76 is formed along the second axis O72.

The tube end 711C, the curved tube 75, the straight tube 76, the curved tube 75, and the tube end 712C are arranged in this order.
The resin pipe 20 is connected to the pipe end 711C (71C) and the pipe end 712C (71C) of the 90 ° bend joint (first joint) 70C by an electric fusion joint (second joint) 30. I have.
Other configurations are the same as those of the seventh embodiment.

<Eighth embodiment>
Next, an eighth embodiment of the present invention will be described with reference to FIG.
FIG. 12 is a schematic configuration diagram illustrating a piping structure according to an eighth embodiment of the present invention.
12, reference numeral 800 denotes a pipe structure, reference numeral 80 denotes a straight pipe with a branch (first joint), and reference numeral 81 denotes a pipe end.

  As shown in FIG. 12, the piping structure 800 includes, for example, a straight pipe 80 with a branch (first joint), a resin pipe 20, and an electric fusion joint (second joint) 30.

The straight pipe with branch (first joint) 80 includes, for example, a branch pipe 85, a pipe 85A, a pipe end 81 connected to the pipe 85A, a pipe end 85B, and a pipe end 85C. And a first belt-shaped portion 12.
The branch pipe 85 is connected to a pipe 85A, a pipe end 85B, and a pipe end 85C.
The pipe portion 85A, the pipe end 81, and the pipe end 85B are formed along the first axis O81.

  The pipe end 85C is a branch pipe disposed between the pipe 85A and the pipe end 85B in the direction of the first axis O81 of the branch pipe 85. In this embodiment, the pipe end 85C is orthogonal to the first axis O81 (intersection angle). 90 °) and is formed along the second axis O2. The tube end 81 and the tube end 85B are formed to have the same outer diameter.

The straight pipe with branches (first joint) 80 is formed of, for example, a polyethylene resin (olefin-based resin).
In addition, the straight pipe with branch (first joint) 80 has a configuration in which, for example, a pipe end 71 formed by extrusion molding is integrally connected to a branch pipe section 85 formed by injection molding.

  The first belt-like portion 12 is formed on the outer peripheral surface of the pipe end 81 at an interval of 90 ° in the circumferential direction from the branch intuition main body 85 toward the pipe end (opening) over the entire length.

The straight pipe with branch (first joint) 80 is capable of, for example, branching a fluid flowing along the first axis O1 to a pipe end 85C.
In this embodiment, the resin pipe 20 is connected to the pipe end 81 by the electric fusion joint (second joint) 30.

The resin pipe 20 may be connected to one or both of the pipe end 85B and the pipe end 85C by an electric fusion joint (second joint) 30.
Other configurations are the same as those of the first embodiment.

<Eighth Embodiment (First Modification)>
Next, a first modification of the eighth embodiment of the present invention will be described with reference to FIG.
FIG. 13 is a schematic configuration diagram illustrating a first modification of the first joint applied to the piping structure according to the eighth embodiment. In FIG. 13, reference numeral 80A indicates a straight pipe with a branch (first joint), and reference numeral 81A indicates a pipe end.

The straight pipe with branch (first joint) 80A includes, for example, a branch pipe 85, a pipe 85A, a pipe end 81A connected to the pipe 85A, a pipe end 85B, and a pipe end 85C. And a first belt-shaped portion 12.
The difference between the straight pipe with branch (first joint) 80A and the straight pipe with branch (first joint) portion 81 according to the eighth embodiment is, for example, the pipe end 81 instead of the pipe end 81. This is a point that a tube end 81A formed to be long and capable of transferring fluid even between different floors is provided.
Other configurations are the same as those of the seventh embodiment.

<Eighth Embodiment (Second Modification)>
Next, a second modification of the eighth embodiment of the present invention will be described with reference to FIG.
FIG. 14 is a schematic configuration diagram illustrating a piping structure according to a second modification of the eighth embodiment.
In FIG. 14, reference numeral 800B denotes a piping structure, reference numeral 80B denotes a straight pipe with an elbow branch (first joint), reference numeral 81B denotes a pipe end portion, and reference numeral 330 denotes a male threaded joint (second joint). I have.

  As shown in FIG. 14, the piping structure 800B includes, for example, a straight pipe with an elbow branch (first joint) 80B, a resin pipe 20, and a male threaded joint (second joint) 330.

The straight pipe 80B with an elbow branch (first joint) 80B includes, for example, a branch pipe section 85, a pipe section 85A, a pipe end section 81 connected to the pipe section 85, a pipe end section 85B, and a pipe end section 85C. , An elbow 87 and the first belt-shaped portion 12.
The straight pipe with an elbow (first joint) 80B differs from the straight pipe with a branch (first joint) 80 in that an elbow 87 is connected to the pipe end 85C.

  The male threaded joint (second joint) 330 is a joint that mechanically connects the pipe end 81 and the pipe end 21 of the resin pipe 20 on the pipe receiving port 331 and the pipe receiving port 332 side, Various well-known external threaded joints can be applied.

The externally threaded joint (second joint) 330 inserts the pipe end 81 into the pipe receiving port 331 and inserts the pipe end 21 of the resin pipe 20 into the pipe receiving port 332 to tighten the screw. , The pipe end 81 and the outer periphery of the resin pipe 20 to connect the pipe end 81 to the resin pipe 20.
Other configurations are the same as those of the seventh embodiment.

  Note that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the invention.

  For example, in the above-described embodiment, the case where the first joint is a T-shaped joint, an elbow joint, or a straight pipe with a branch has been described, but the first joint may be applied to another joint.

  Further, in the above embodiment, the case where the pipe or the joint (other joint) connected to the first joint is the resin pipe 20 or the T-shaped joint 10D, but other various pipes or joints are applied. May be.

  Further, in the above embodiment, the case where the second joint is the electric fusion joint 30, the T-shaped electric fusion joint 130, and the male threaded joint 330 has been described. May be applied.

  Further, in the above-described embodiment, the case where the first band-shaped portion 12 extends from the tube end (opening) of the tube end of the first joint has been described. Whether or not to extend from the (opening) can be appropriately set. For example, the first belt-shaped portion 12 is set to a set dimension (for example, 40 mm) from the pipe end (opening) of the pipe end of the first joint. Alternatively, it may be formed from a position that is only separated.

Further, in the above embodiment, the case where the first joint, the pipe, and the second joint are formed of a polyethylene resin has been described. However, for example, the first joint, the pipe, and the second joint may be formed of another olefin-based resin such as a polypropylene resin.
Further, instead of the olefin resin, the first joint, the pipe, and the second joint may be formed of another thermoplastic resin (for example, polyvinyl chloride, ABS resin, or the like).

Further, in the above-described embodiment, the case where four first belt-shaped portions 12 and two second belt-shaped portions 22 are formed in the circumferential direction has been described. However, the first belt-shaped portion and the second belt-shaped portion arranged in the circumferential direction are described. Can be set arbitrarily.
In addition, the positions and lengths of the first band-shaped portion 12 and the second band-shaped portion 22 in the axial direction can be arbitrarily set.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention, and the above-described embodiments may be appropriately combined and applied.

100, 200, 300, 400, 500, 600, 700, 700A, 700B, 700C, 800, 800B Piping structure 10, 10A, 10B, 10C, T-joint (first joint)
11, 111, 111B, 111C, 112, 113 Pipe end 10D T-joint (other joint)
11, 111C, 112A, 113A Pipe end 12A Second strip 20, 20A Resin piping (piping)
21, 21A Pipe end 22, 22A Second strip 30 Electric fusion joint (second joint)
130 T-shaped electric fusion joint (second joint)
330 Fitting with Male Thread (Second Fitting)
50 Y-shaped joint (first joint)
51, 52, 53 Pipe ends 70, 70A, 70B, 70C Elbow joint (first joint)
71, 71A, 71B, 71C, 711, 711A, 711B, 711C, 712, 712A, 712B, 712C Pipe ends 80, 80A, 80B Straight pipe with branch (first joint)
81, 81A, 81B, 85B Pipe end

Claims (3)

A first joint having a plurality of pipe ends, at least one of the plurality of pipe ends intersecting with another pipe end;
A pipe or joint having a pipe end connected to the pipe end of the first joint,
A second joint, which is arranged on the outer periphery of the pipe end of the first joint and the outer periphery of the pipe end of the pipe or joint, and connects the pipe end of the first joint and the pipe end of the pipe or joint; ,
With
At least one of the connecting portions where the pipe end of the first joint and the pipe end of the pipe or the joint are connected,
A plurality of first strip-shaped portions which are arranged at intervals in a circumferential direction on an outer peripheral surface of a pipe end portion of the first joint and extend axially outward of the second joint, and a pipe end of the pipe or the joint; A plurality of second band-shaped portions which are arranged at intervals in the circumferential direction on the outer peripheral surface of the portion and extend axially outward of the second joint;
A piping structure comprising: The piping structure according to claim 1, wherein
The first belt-like part is
A pipe structure, wherein a length extending outward from the second joint is formed to be 10 mm or more and 150 mm or less. The piping structure according to claim 1 or 2,
The first joint, the pipe or the joint, the second joint is formed of an olefin-based resin,
A piping structure, wherein the first joint and the pipe or the joint are fused to the second joint.

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