JP2001011907A - Pipe branching device, and piping structure using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe branching device suitable for arranging the piping to each indoor water supply position from a main pipe using a plurality of flexible pipes, and a piping structure using this pipe branching device. SOLUTION: This pipe branching device 30 to arrange the piping from an outdoor or underfloor main pipe to indoor water supply positions using a plurality of flexible sheath pipes and a plurality of flexible branch pipes passed through each of the plurality of sheath pipes, comprises a box 31 having a main pipe passing hole 311 through which the main pipe is passed and a plurality of sheath pipe passing holes 312 to pass the sheath pipes through which the branch pipes are passed, and a header 40 to direct a main pipe connection part 41 to which the main pipe is connected within the box 31 and a plurality of branch pipe connection parts 42 to which a plurality of branch pipes are respectively connected toward the main pipe passing hole 311 and the sheath pipe passing holes 312, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe branching device used for piping from a main pipe to indoors, and a pipe structure used for the pipe branching device. For more information,
The present invention relates to a structural technique suitable for piping using a flexible branch pipe such as a pipe made of polybutene or crosslinked polyethylene.

[0002]

2. Description of the Related Art Conventionally, when branch pipes are branched from a main pipe to various places in a room, the main pipe is guided to a room, and branch pipes are formed from the main pipe to each water supply position with steel pipes. However, when pipes are drawn indoors with steel pipes as in the past, it is necessary to connect the steel pipes with a number of joints such as elbows and cheeses. To make such a connection, thread the ends of the steel pipes with threads. You need to do it. For this reason, in the piping work, the thread cutting work is troublesome, and the reliability of the screwed portion is low. In addition, when such pipes are used, since long pipes are routed by steel pipes, pipes are screwed in more places, which takes a lot of time and effort in construction, and causes a large pressure loss.
Piping reliability is further reduced.

[0003] The applicant of the present invention has invented a piping structure using a flexible pipe for routing a branch pipe from a main pipe to a room and has applied for a patent (Japanese Patent No. 2892946). In this piping structure, a plurality of flexible sheath pipes are respectively routed from the main pipe to each indoor water supply position, and a flexible branch pipe is passed through each of these sheath pipes. According to this piping structure, even when the length of the branch pipe is long, the sheath pipe and the branch pipe can be drawn while being bent, so that there is no need to pipe using a large number of joints such as elbows and cheeses, and the construction is easy. It is. Further, the pipes can be connected to each other by a method such as heat fusion or mechanical bonding, and there is almost no threaded portion, so that the reliability of the connected portion is high. Furthermore, after the old branch pipe is pulled out from the sheath pipe, there is an advantage that the branch pipe can be renewed simply by inserting a new branch pipe into the sheath pipe.

[0004]

In order to efficiently perform such piping, it is important to connect the main pipe and the branch pipe without any trouble and to draw out the branch pipe therefrom. However, at present, there is no piping branching device optimal for the piping structure according to the present invention.

[0005] Therefore, an object of the present invention is to provide a pipe branching device suitable for performing piping from a main pipe to each water supply position from a main pipe to a room using a plurality of flexible pipes, and to use the pipe branching device. The purpose of the present invention is to provide an improved piping structure.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plurality of flexible sheath tubes and a plurality of sheath tubes from an outdoor or underfloor main pipe to a plurality of indoor water supply positions. What is claimed is: 1. A piping branching device for performing piping using a plurality of flexible branch pipes passed through each of pipes, wherein a main pipe insertion hole through which the main pipe is passed and a plurality of sheaths through which the sheath pipe is passed. A box in which a pipe insertion hole is formed, and a main pipe connection portion to which the main pipe is connected and a plurality of branch pipe connection portions to which the plurality of branch pipes are respectively connected in the box. And a header that faces the side of the sheath tube insertion hole.

In the present invention, the box for accommodating the header is formed with the main tube insertion hole and the sheath tube insertion hole, and the header in the box connects the main tube connection portion and the branch tube connection portion with the main tube insertion hole and the sheath tube respectively. Because it is aimed at the insertion hole,
The main pipe drawn into the box from the main pipe insertion hole is connected to the main pipe connection part of the header, while a plurality of branch pipes can be connected to each of the branch pipe connection parts formed on the header. Can be linked to Further, with respect to the sheath tube through which the branch pipe is passed, the sheath tube can be easily pulled into the box or drawn out of the box only by passing through the sheath tube insertion hole. Therefore, the piping from the main pipe to each water supply position from the main pipe to the indoor can be performed using a flexible pipe without any trouble.

In the present invention, it is preferable that the plurality of headers are arranged in the box while a plurality of headers are fixed at different heights from each other on a header base arranged in the box. With such a configuration, even when the connection of the branch pipes is insufficient with one header, a plurality of headers can be arranged in the box, so that a large number of branch pipes can be connected to the main pipe with one pipe branching device. Further, since the plurality of headers are formed at different heights, the sheath tube passing through the branch pipe can be easily routed from the header to the sheath tube insertion hole in the box.

In the present invention, it is preferable that the main tube insertion holes are respectively formed at positions facing each of the opposed side portions of the box. With this configuration, there is an advantage that it is possible to select from which side of the two directions in which the main pipe insertion hole of the box is formed the main pipe is drawn into the box in accordance with the position of the main pipe. Also, even when the required number of water supplies and hot water supplies is not enough, it is easy to cover the shortage by arranging the boxes side by side.

In the present invention, the header mount is disposed on a seat placed on the bottom of the box, so that the header mount is located at a predetermined height from the bottom of the box. Preferably, they are arranged.
With this configuration, the header base is in a state of being floating from the bottom of the box, so that it is easy to put a hand around the main pipe connecting portion of the header when connecting the main pipe to the header. Therefore, the connection work between the header and the main pipe can be easily performed. In addition, maintenance after construction is easy.

[0011] The pipe branching device according to the present invention, for example,
When the main pipe is located only outside, a guide pipe is extended from the pipe branching device installed outdoors to a predetermined position such as under the floor, and a plurality of sheath pipes are passed through the guide pipe, and then these sheath pipes are passed through. It can be used to construct a piping structure in which the pipes are routed from the outlet of the guide pipe to each indoor water supply position. Thus, when the pipe branching device is installed outdoors, there are the following advantages. First, since the primary side of the header is still joined by threading to the steel pipe, maintenance after the installation can be performed outdoors. Also, if the header is outside, you can easily secure an inspection port for the header, and on which part of the floor you should secure the inspection port,
Don't worry. Further, when an inspection port is formed on the floor, there is a disadvantage that a squeak sound is produced when walking on a lid covering the inspection port. However, such an inconvenience does not occur if the header is installed outdoors. Furthermore, when the header is installed outdoors, there is no need to attach a freezing prevention heater or the like because the metal main pipe is underground up to the header.

Further, in the pipe branching device according to the present invention, for example, when the main pipe goes down to the floor, the pipe branching device is installed under the floor, and the sheath pipe is connected to each indoor water supply from the pipe branching device. Used to construct a piping structure that has been routed to a location. That is, the pipe branching device according to the present invention can be used for constructing a piping structure in which a sheath pipe is routed from the pipe branching device without using a guide pipe. Thus, when the pipe branching device is installed under the floor, there are the following advantages. First, a box can prevent mice and the like from gathering due to the heat of the header. Further, by installing the header at a low position, drainage can be easily performed. Further, the cool air entering from the ground window can be cut by the pipe branching device.

Further, in the pipe branching device according to the present invention, for example, even when the main pipe only comes to the outside, the pipe is drawn from the pipe branching device to each indoor water supply position without using the guide pipe. It can also be used to construct structures.

[0014]

Embodiments of the present invention will be described with reference to the drawings.

[Overall Configuration of Centralized Piping Structure] FIG. 1 is an explanatory view schematically showing the entire centralized piping structure of this embodiment.
FIG. 2 is a cross-sectional view schematically showing a connecting portion between a branch pipe and a header in the pipe branching device shown in FIG. FIG.
FIG. 3A is a cross-sectional view schematically showing a state in which a branch pipe is passed through a sheath pipe used in the centralized piping structure of the present embodiment, and FIG.
It is sectional drawing which shows the mode that the sheath pipe | tube and the branch pipe were cut | disconnected by the AA 'line of (a). FIG. 4 is an explanatory view schematically showing a structure of a water supply part where branch pipes are drawn and piped by the centralized pipe structure shown in FIG. 1.

As shown in FIG. 1, in the centralized piping structure 1 of the present embodiment, when water is supplied to various places inside the house 10 in a house having the foundation of the air cycle structure, the outside 11
The pipe branching device 30 is buried in the ground near the rear stage of the antifreeze plug 21 of φ20 m / m, and water from the main pipe 20 is distributed from the header 40 provided in the pipe branching device 30.
Here, the main pipe 20 is, for example, a lining steel pipe of φ20 m / m. The header 40 has a main pipe connecting portion 41 to which the main pipe 20 is connected, and a plurality of branch pipe connecting portions 42 protruding from the side surface of the header 40.

Water is also supplied to the boiler 26 in the outdoor area 11, and although not shown, the hot water supplied from the boiler 26 through the main pipe 20 also has a φ20 m / m hot-water supply steel pipe and a pipe branching device. Hot water is supplied to various parts of the room 10 via a header in the room 30.

A water meter 25 is connected to the main pipe 20, and φ is provided in front of a boiler 26 (water heater).
A 13 m / m antifreeze plug 27 is inserted.

As described later in detail, in this embodiment, 1
Two headers 40 are arranged inside one pipe branching device 30, one of which is a water supply header to which water from the main pipe 20 is supplied, and the other is a boiler 2.
6 is a hot water supply header to which hot water from 6 is supplied. Here, the drain valve is underground. The piping structure from the water supply header to the indoor water supply position and the branch piping structure from the water supply header to the indoor water supply position have basically the same structure.

Connected to each branch pipe connecting portion 42 of the header 40 is a flexible branch pipe 51 made of polybutene or crosslinked polyethylene. For connecting the branch pipe connecting portion 42 and the branch pipe 51, for example, as shown in FIG. 2, a cap nut 43 is used. The polybutene pipe or the cross-linked polyethylene pipe used for the branch pipe 51 has higher strength even in a high-temperature atmosphere, and is superior in corrosion resistance and the like, and is superior to a steel pipe as a water supply pipe. Here, it is preferable that a muffling material 55 such as a muffling tape is wound around the branch pipe 51.

Each branch 51 is passed through a sheath tube 52 made of synthetic resin which is also flexible. A cap 53 is fitted to the end of the sheath tube 52 through the branch tube 51 so that the branch tube 51 cannot be accidentally pulled out of the sheath tube 53. In this example, the water supply path uses a blue sheath pipe, and the hot water supply path uses a red sheath pipe.

The outline of the piping structure using the branch pipe 51 and the sheath pipe 52 will be described below together with the method of construction.

In FIG. 1, a guide pipe 54 made of a vinyl chloride pipe is buried from the pipe branching device 30 to the indoor underfloor 12, and the guide pipe 54 opens on the inner surface of the pipe branching device 30. And under the floor 12
Open on the ground. Here, although the detailed illustration is omitted, the guide tube 54 is in a state of being loosely bent using a large bending elbow or the like. After disposing the guide tube 54 in such a state, first, the sheath tube 52 is passed through the inside of the guide tube 54, and the sheath tube 52 passes through the floor plate 17 or a predetermined portion formed on the wall through the floor plate 17. It is routed to the water supply position 15.

After such a state, FIG.
As shown in (b), a branch pipe 51 is inserted into a pipe branching device 30 inside a sheath pipe 52 which is routed to a predetermined water supply position 15.
By passing from inside, the branch pipe 51 is guided to the sheath pipe 52 and is routed to each water supply position 15 in the room 10 to be piped.

At the water supply position 15, for example, as shown in FIG. 4, a branch pipe 51 and a sheath pipe 52 are raised on the back side of the wall plate 16, and as shown by an arrow B from a hole formed in the wall plate 16. 51 is pulled out, and a water tap 19 is attached to the tip thereof via a joint 191 such as a resin or metal Φ socket or elbow. Here, an external thread and an internal thread are formed in a joint portion with the water tap 19 on the joint 191 side. When configuring such a water supply part,
First, for example, the elbow box 6
0 is fixed. In the elbow box 60, a sheath tube receiving port 61 is formed downward, and
A fixing ring 63 forming a branch pipe drawing hole 62 is attached to the front surface. Further, a decorative plate 64 is placed on the front surface of the fixing ring 63. In order to guide the branch pipe 51 from the pipe branching device 30 buried underground to the mounting position of the fixing ring 63 (water supply position 15) using the elbow box 60 having such a structure, the sheath pipe 52 is branched through the guide pipe 54. The device is guided from the device 30 to the elbow box 60, and the sheath tube 52 is connected to the sheath tube receiving port 61 using the receiving sleeve 64. In this state, when the branch pipe 51 is pushed into the sheath pipe 52 from the side of the pipe branching device 30, the branch pipe 51 reaches the elbow box 60 through the inside of the sheath pipe 52, and then travels along the gently bent internal passage. Drawn out from the branch pipe drawing hole 62. Thereafter, the water tap 19 is connected to the branch pipe 51. The same applies to other water supply positions.

As described above, in the centralized piping structure 1 of the present embodiment,
Since the branch pipe 51 made of polybutene or cross-linked polyethylene has flexibility, if the guide pipe 54 is provided from the outdoor pipe branching device 30 to the floor 12 below, the guide pipe 54 is provided.
Then, the branch pipe 51 is passed through the inside of the sheath pipe 5, and then the branch pipe 51 is passed through the inside of the sheath pipe 5, whereby the branch pipe 51 can be easily routed and piped. Therefore, it is not necessary to use a joint such as an elbow from the inside of the pipe branching device 30 to the rising portion of the water tap 19. Therefore, as in this example, the pipe branching device 30 near the antifreeze plug 21 in the outdoor 11 is set at the branching position to cope with freezing in a cold region, and therefore, even when the branching distance of the branch pipe 51 is long, construction can be performed. Is easy. In addition, since the number of screwed portions is small, the reliability of the piping is high.

After the construction, after the old branch pipe 51 is pulled out from the sheath pipe 52, the new branch pipe 51 is replaced with the sheath pipe 52.
, The branch pipe 51 from the pipe branching device 30 to the water supply position 15 can be updated. Further, the branch pipe 51
Is made of polybutene or cross-linked polyethylene, and when connection is required, the connection can be made by heat fusion or mechanical joining instead of threading, so that the connection portion is highly reliable.

The following advantages are obtained when the pipe branching device 30 is buried outdoors underground. First, header 4
Since the primary side of No. 0 is still joined by screw cutting to a steel pipe, maintenance after the installation can be performed outdoors. In addition, if the header 40 is outdoors, an inspection port for the header 40 can be easily secured, and it is not necessary to worry about which part of the floor to secure the inspection port. Further, when the inspection port is formed on the floor, there is a disadvantage that a squeak sound is produced when walking on the lid covering the inspection port. However, if the header 40 is installed outdoors, such a problem does not occur. Furthermore, when the header 40 is installed outdoors, there is no need to attach a freezing prevention heater or the like since the metal main pipe is underground up to the header 40.

[Structure of piping branching device] In constructing such a centralized piping structure, in this embodiment, a piping branching device 30 shown in FIG. 5 is used.

FIG. 5 shows the centralized piping structure of the present embodiment.
It is a disassembled perspective view of the piping branching device which connects a main pipe and a branch pipe. FIG. 6 is a plan view showing an arrangement relationship between a header, a main pipe, and a sheath pipe arranged in the pipe branching device shown in FIG. FIG. 7 is a perspective view showing the appearance of the pipe branching device.

The pipe branching device 30 first has four main pipe insertion holes 311 (311) through which the main pipe 20 (see FIG. 1) passes.
A, 311B, 311C, 311D) and six sheath tube insertion holes 31 through which a sheath tube 52 in which a branch tube 51 is passed.
2 (312A, 312B, 312C, 312D, 312
(E, 312F), raised frames 32, 33 to be superimposed on the box 31, and a lid 34 made of a steel plate. Such raised frame 32,
The use of the 33 enables to cope even when the height of the ground fluctuates, and if the raised frames 32 and 33 are removed, the connection with the header 40 can be performed only by the lowermost box 31. Is good.

In the box 31, the main tube insertion holes 311A and 311B formed on the side surface portion 315 side and the main tube insertion holes 311C and 311D formed on the side surface portion 316 side.
Are formed at positions opposing each other, and the main pipe insertion holes 311B and 311D are provided with the main pipe insertion holes 311A and 311C.
It is formed at a higher position. In addition, the sheath tube insertion hole 3
1 is provided with a guide tube connection socket 38.

The pipe branching device 30 includes a header 40
(40A, 40B) and the header 40 in the box 31
(40A, 40B) to hold the header base 35 horizontally
And two seats 36 placed on the bottom 310 of the box 31.

The header base 35 has a total of four header support plates 351 (351A, 351B) rising from the bottom plate portion 350 for fixing the headers 40, respectively. After passing through a hole 356 (356A, 356B) formed in the U-shaped rod 351,
By fixing a screw (not shown) to the end of No. 2,
The header 40 is fixed to the header base 35. Where 2
The height position when the header 40 (40A, 40B) of the book is fixed to the header base 35 is defined by the height position of the hole 356 formed in the header support plate 351. In the example shown in FIG. The hole 356B used to fix the header 40B is higher than the hole 356A used to fix the header 40A. Therefore, with the header 40 fixed to the header base 35, the header 40 is arranged at a higher position in the box 51 in the box 40B than in the header 40A.

As described above, the header 40 has a main pipe connecting portion 41 at one end and a branch pipe connecting portion 42 at a side surface. The header 40 is fixed to the header base 35, and With the header base 35 arranged in the box 31, the two headers 40 (40A, 40B)
The branch pipe connecting portion 42 is directed toward the sheath tube insertion hole 312. In a state where the header 40 is fixed to the header frame 35 and the header frame 35 is arranged in the box 31, both ends of the header 40 (40A, 40B) are directed to the side surfaces 315, 316 of the box 31, respectively. However, in the example shown in FIG. 5, the header 40 (40A, 40B) is
1 is directed toward the side portion 316 of the side portions 315 and 316, and in this state, each main pipe connecting portion 41 of the header 40 (40A, 40B) is inserted into the main pipe insertion hole 311C formed in the side portion 316. , 311D.

In order to connect the main pipe 20 and the branch pipe 51 using the pipe branching device 30 configured as described above, as shown in FIG. 6, a box 31 of the pipe branching device 30 is installed in a hole dug in the ground. After that, lay a guide tube and so on.

Next, the guide tube 54 is connected to the 0 guide tube connection socket 38 of the box 31.

Next, the main pipe 20 is connected to the side portion 3 of the box 31.
The seat 36 is arranged at a predetermined position depending on which side of the seat 15 or 316 is to be arranged. That is, in the example shown in FIG. 6, the main pipe 20 is drawn in from the side surface portion 316 of the side surface portions 315 and 316 of the box 31, and thus the header base 35 is arranged close to the side surface portion 315. At the position where the header base 35 is stably supported by the
Place. Next, the header base 35 to which the header 40 is fixed is placed on the seat 36. Therefore, the header base 3
5 is floating from the bottom 310 of the box 31.

In this state, the header 40 (40A, 40B)
Each of the main pipe connecting portions 41 has a main pipe insertion hole 311C, 311D.
, The main tube insertion holes 311C, 311
D, the end of the main pipe 20 is drawn into the box 31 and the header 40 (40A, 40A
B) Each main pipe connecting part 41 and the main pipe 20 are connected.

The sheath tube 52 having passed through the branch tube 51 has already been drawn into the box 31 through the sheath tube insertion hole 312. Here, although not shown, the header 40
B is higher than the header 40A, and there is a sufficient gap between the bottom plate 350 of the header base 35 and the header 40B. Therefore, of the sheath tubes 52 passing through the sheath tube insertion hole 312 of the box 31 and passing through the branch pipe 51 connected to the header 40A, the sheath tube 52 passing through the lower position of the header 40B is disposed toward the header 40A. It is. From this state, the end of the branch pipe 51 protruding from the end of the sheath pipe 52 is connected to each branch pipe connecting portion 42 of the header 40, and the branch pipe 51 is connected to the main pipe 20 via the header 40.

After the branch of the pipe is completed in this way,
On the box 31, pile up the raising frames 32, 33,
Then, cover 34 is put on. A cap 37 is fitted to the main pipe insertion holes 311A and 311B, which are not used for drawing in the main pipe 20, to prevent water, earth and sand, and mice from entering the box 31.

As described above, in the pipe branching device 30 of the present embodiment, the main pipe insertion hole 311 and the sheath pipe insertion hole 312 are formed in the box 31 for storing the two headers 40, and the header is formed in the box 31. Reference numeral 40 designates the main pipe connecting part 41 and the branch pipe connecting part 42 toward the main pipe insertion hole 311 and the sheath pipe insertion hole 312, respectively.
The main pipe 20 drawn into the box 31 from the
The main pipe connecting part 41 of the header 40 and the branch pipes 51 may be connected to the respective branch pipe connecting parts 42 of the header 40.
The main pipe 20 and the branch pipe 51 can be easily connected. Further, with respect to the sheath tube 52 through which the branch pipe 51 passes, the sheath tube 52 can be easily pulled into the box 31 or drawn out of the box 31 simply by passing the sheath tube through the hole 52. Can be done. Therefore, piping from the main pipe 20 to each water supply position to the indoor can be performed without trouble by using flexible pipes (branch pipe 51 and sheath pipe 52).

The header 40 has two boxes 31.
In the box 31, the branch pipes 51 and the sheath pipes 52 are fixed at a high position because the branch pipes 51 and the sheath pipes 52 are fixed at different height positions with respect to the header base 35. Through the header 40B.

In this embodiment, the main tube insertion hole 311
Are formed at positions opposing each of the opposing side surfaces 315 and 316 of the box 31, so that any one of the side surfaces 351 and 352 of the box 31 is adjusted in accordance with the position of the main pipe 20. Has the advantage that it is possible to select whether the main pipe 20 is to be drawn into the box 31 from the side.

The header base 35 is placed on the seat 36 so as to float from the bottom 310 of the box 31. For this reason, when connecting the main pipe 20 to the header 40, it is easy to put a hand around the main pipe connecting portion 41 of the header 40, so that the connecting operation can be easily performed.

[Other Embodiments] In the above embodiment, since the main pipe 20 reaches only the outside, the pipe branching device 30 is arranged outdoors, and the guide pipe 54 is extended from the pipe branching device 30 to the floor below. For example, when the main pipe 20 reaches below the floor, the pipe branching device 30 may be disposed under the floor. Therefore, the pipe branching device 30 is used without using the guide pipe 54. The configuration may be such that the sheath pipe 52 is routed from the water supply position to each indoor water supply position. Further, even when the main pipe 20 reaches only the outside, the sheath pipe 52 may be routed from the pipe branching device 30 to each indoor water supply position without using the guide pipe 54.

[0047]

As described above, in the pipe branching device according to the present invention, the box for accommodating the header is formed with the main pipe insertion hole and the sheath pipe insertion hole, and the header is connected to the main pipe in the box. The main pipe drawn into the box from the main pipe insertion hole is connected to the main pipe connection part of the header, while the branch pipe and the branch pipe connection part are directed to the main pipe insertion hole and the sheath pipe insertion hole, respectively. Since it is sufficient to connect a plurality of branches to the connection part, the main pipe and the branches can be easily connected. Further, with respect to the sheath tube through which the branch pipe is passed, the sheath tube can be easily pulled into the box or drawn out of the box only by passing through the sheath tube insertion hole. Therefore, the piping from the main pipe to each water supply position from the main pipe to the indoor can be performed using a flexible pipe without any trouble.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing the entire centralized piping structure to which the present invention is applied.

FIG. 2 is a cross-sectional view schematically showing a connecting portion between a branch pipe and a header in the pipe branching device shown in FIG.

3A is a cross-sectional view schematically showing a state where a branch pipe is passed through a sheath pipe used in the centralized piping structure shown in FIG. 1, and FIG.
FIG. 4 is a cross-sectional view schematically showing a state where a sheath tube and a branch tube are cut along the line AA ′ in FIG.

FIG. 4 is an explanatory view schematically showing a structure of a water supply portion where a branch pipe is routed and piped by the centralized pipe structure shown in FIG.

5 is an exploded perspective view of a pipe branching device for connecting a main pipe and a branch pipe in the centralized pipe structure shown in FIG.

FIG. 6 is a plan view showing an arrangement relationship between a header, a main pipe, and a sheath pipe arranged in the pipe branching device shown in FIG.

FIG. 7 is a perspective view showing an appearance of the pipe branching device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Centralized piping structure 10 Indoor 11 Outdoor 12 Below floor 15 Water supply position 20 Main pipe 30 Pipe branching device 40, 40A, 40B Header 41 Main pipe connecting part 42 Branch pipe connecting part 51 Polybutene branch pipe 52 Synthetic resin or crosslinked polyethylene sheath pipe 31 Boxes 32, 33 Raising frame 34 Cover 35 Header base 36 Seat 38 Guide pipe connection socket 54 Guide pipe made of vinyl chloride pipe 311 311A-311D Main pipe insertion hole 312, 312A-312F Sheath tube insertion hole 351, 351A, 351B Header Support plate

Claims (6)

[Claims] A plurality of flexible sheath pipes and a plurality of flexible branch pipes passing through each of the plurality of sheath pipes are used from an outdoor or underfloor main pipe to a plurality of indoor water supply positions. A pipe branching device for performing piping through the main pipe, a main pipe insertion hole through which the main pipe is passed, and a box formed with a plurality of sheath pipe insertion holes through which the sheath pipe is passed through the branch pipe, In the box, a main pipe connecting portion to which the main pipe is connected and a plurality of branch pipe connecting portions to which the plurality of branch pipes are respectively connected are headers that face the main pipe insertion hole side and the sheath pipe insertion hole side, respectively. A pipe branching device comprising: 2. The header according to claim 1, wherein a plurality of headers are arranged in the box with a plurality of headers being fixed to different height positions on a header base arranged in the box. Pipe branching equipment. 3. The pipe branching device according to claim 1, wherein the main pipe insertion holes are formed so as to be opposed to each of opposed side portions of the box. . 4. The method according to claim 3, wherein:
A pipe branching device, wherein the header gantry is arranged at a predetermined height from the bottom of the box by being arranged on a seat placed on the bottom of the box. . 5. A piping structure using the piping branching device defined in any one of claims 1 to 4, wherein the sheath tube comprises:
A pipe structure, wherein a plurality of guide pipes extending from the pipe branching device to a predetermined position are passed, and each pipe is routed from an outlet of the guide pipe to each water supply position indoors. 6. A piping structure using the piping branching device defined in any one of claims 1 to 4, wherein the sheath tube comprises:
A piping structure which is routed from the piping branching device to each indoor water supply position.