JP7071887B2 - Pipe and piping structure - Google Patents

Description

The present invention relates to pipes and piping structures.

In recent years, there has been an increasing demand for piping on the front side of building walls in the renovation of condominiums. When the pipe is installed on the front side of the building wall, the pipe is visible to the user, so that a more beautiful pipe is desired as compared with the case where the pipe is installed on the back side of the building wall.

For example, Japanese Patent Application Laid-Open No. 2012-246965 (Patent Document 1) discloses a piping structure provided in a region including an inside corner and an outside corner of a building wall. In this piping structure, elbow-shaped joints (hereinafter, also referred to as “elbow joints”) bent 90 degrees along each of the inside corner and the outside corner are arranged, and the elbow joints are connected to each other via a straight pipe. ing. As a result, a beautiful pipe is realized in which each pipe is along the building wall (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-246965

However, depending on the length between the inside corner and the outside corner, even if the piping structure disclosed in Patent Document 1 is used, a beautiful piping cannot be realized. For example, the length detoured in the connection direction by connecting elbow joints to each other via the shortest straight pipe (hereinafter, also referred to as "reference length") is larger than the length between the inside corner and the outside corner. If it is long, one of the elbow joints will float from the wall, making it impossible to realize beautiful piping.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a pipe and a pipe structure capable of beautiful piping regardless of the length between the inside corner and the outside corner. That is.

A pipe according to an aspect of the present invention is a pipe configured to connect to an elbow-shaped fitting. The pipe includes a curved pipe portion, a first straight pipe portion, and a second straight pipe portion. The first straight pipe portion extends from one end of the curved pipe portion. The second straight pipe portion extends from the other end of the curved pipe portion. The curved pipe portion is arranged along the inside corner or the outside corner of the building wall at the time of piping. The pipe axis of the first straight pipe portion and the pipe axis of the second straight pipe portion intersect vertically. The length of each of the first and second straight pipe portions in the pipe axial direction is equal to or larger than the insertion allowance of the joint.

This pipe is placed along the inside or outside corners of the building wall during plumbing. The length of the first or second straight pipe portion can be adjusted by cutting, for example. Therefore, according to this pipe, a beautiful pipe can be realized regardless of the length between the inside corner and the outside corner.

In the above pipe, the length of the first pipe structure formed by connecting one of the first and second straight pipe portions and the joint to detour in the connection direction is formed by connecting the joints via the shortest straight pipe. The second piping structure to be formed may be shorter than the length detouring in the connection direction.

In this pipe, the length of the first pipe structure formed by connecting one of the first and second straight pipe portions and the elbow joint to detour in the connection direction is shorter than the reference length. Therefore, according to this pipe, a beautiful pipe can be realized even if the length between the inside corner and the outside corner is shorter than the reference length.

In the above pipe, at least one surface of the first and second straight pipe portions may be provided with a display indicating a reference position for cutting the pipe to a desired length.

The length between the inside and outside corners varies from place to place. If the length of the tube is too long, it is necessary to cut a part. In this pipe, at least one surface of the first and second straight pipe portions is provided with a display indicating a reference position for cutting. Therefore, the person in charge of construction can easily cut the pipe to a desired length while referring to this display.

A piping structure according to another aspect of the present invention is a piping structure provided in an area including an inside corner and an outside corner of a building wall. The piping structure includes an elbow-shaped joint, an elbow-shaped pipe, and a protective cover. The joint is arranged along one of the inside corner and the outside corner. The pipe is arranged along the other of the inside and outside corners, and one end is connected to the fitting. The protective cover covers the fittings and pipes.

In this piping structure, an elbow-shaped pipe is used for piping in a region including an inside corner and an outside corner. Therefore, according to this piping structure, depending on the length of the elbow-shaped pipe, a beautiful pipe can be realized even if the length between the inside corner and the outside corner is short.

A piping structure according to another aspect of the present invention is a piping structure provided in an area including an inside corner and an outside corner of a building wall. The piping structure includes an elbow-shaped joint and an elbow-shaped pipe. The joint is arranged along one of the inside corner and the outside corner. The pipe is arranged along the other of the inside and outside corners, and one end is connected to the fitting. The length that the first pipe structure formed by the connection between the pipe and the joint detours in the connection direction is the length that the second pipe structure formed by the connection between the joints via the shortest straight pipe detours in the connection direction. Shorter than that.

In this piping structure, the length of the first piping structure formed by connecting the pipe and the elbow joint to detour in the connection direction is shorter than the reference length. Therefore, according to this piping structure, a beautiful piping can be realized even if the length between the inside corner and the outside corner is shorter than the reference length.

According to the present invention, it is possible to provide a pipe and a pipe structure capable of beautiful piping regardless of the length between the inside corner and the outside corner.

It is a figure which shows the pipe structure to which the pipe according to Embodiment 1 is applied. It is a figure which shows the appearance composition of a tube. It is a figure for demonstrating the length of a straight pipe part in a pipe axis direction. It is a figure which shows an example of the piping structure including a pipe. It is a figure which shows the other example of the piping structure which includes a pipe. It is a figure for demonstrating Example 1 of a tube. It is a figure for demonstrating Example 2 of a tube. It is a side view of the pipe according to Embodiment 2. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated.

[1. Embodiment 1]
<1-1. Piping structure>
FIG. 1 is a diagram showing a pipe structure 90 to which the pipe 10 according to the first embodiment is applied. Although omitted in FIG. 1, the piping structure 90 is further extended and connected to a water pipe or a water heater. That is, the piping structure 90 is a piping structure for water supply or hot water supply.

As shown in FIG. 1, the piping structure 90 includes a pipe 10, an elbow joint 20, and a straight pipe 30. The pipe 10 has a shape curved to approximately 90 degrees and is connected to one end of the elbow joint 20. The straight pipe 30 has a straight shape and is connected to the other end of the elbow joint 20. The pipe 10 and the straight pipe 30 are configured to pass a fluid (water, hot water, etc.), and are preferably formed of a polyolefin resin containing, for example, polyethylene, polypropylene, polybutadiene, etc. It may be formed of the resin of. The tube 10 is made, for example, by injection molding, and the straight tube 30 is made, for example, by extrusion molding.

The elbow joint 20 is an elbow-shaped joint and is configured to allow fluid to pass through. The elbow joint 20 has a water channel having a circular cross section inside, and includes an elbow bent at 90 degrees and a joint body attached to both ends of the elbow. The joint body includes an outer cylinder and an inner cylinder that define a tubular receiving port into which the pipe 10 is inserted, and a retaining ring having teeth that bite into the inserted pipe 10 formed on the inner circumference. The structure and dimensions of the joint bodies at both ends are the same. The elbow joint 20 is a so-called one-touch joint provided with retaining teeth. Therefore, the person in charge of construction can connect the pipe 10 or the straight pipe 30 and the elbow joint 20 simply by inserting the pipe 10 or the straight pipe 30 into the receiving port of the elbow joint 20 without using a special tool.

The piping structure 90 is provided along the inside corner 42 and the outside corner 44 of the building wall 40. In the pipe structure 90, the pipe 10 is piped along the inside corner 42 and the elbow joint 20 is piped along the outside corner 44.

As shown in FIG. 3, a one-touch joint 25 (hereinafter referred to as a socket) is connected to the other end of the pipe 10 opposite to the one end to which the elbow joint 20 is connected. In the socket 25, the receiving ports at both ends are arranged in a straight line, and another straight pipe is connected to the other end of the pipe 10 via the socket 25.

If the length between the inside corner 42 and the outside corner 44 is longer than the reference length (the length detoured in the connection direction by connecting the elbow joints 20 via the shortest straight pipe), for example, By aligning the elbow joint 20 along each of the inner corner 42 and the outer corner 44, each pipe can realize a beautiful pipe along the building wall 40. However, when the length between the inside corner 42 and the outside corner 44 is shorter than the reference length, a beautiful pipe cannot be realized by the same method.

In the first embodiment, even when the length between the inside corner 42 and the outside corner 44 is shorter than the reference length, a beautiful pipe is realized by using the pipe 10. Hereinafter, it will be described in detail.

<1-2. Tube configuration>
FIG. 2 is a diagram showing an external configuration of the pipe 10. With reference to FIG. 2, the left side is a front view of the pipe 10, and the right side is a side view of the pipe 10.

With reference to the left side of FIG. 2, a hole 11 having a circular cross section is formed in the pipe 10. In the pipe 10, the fluid flows through the hole 11.

With reference to the right side of FIG. 2, the pipe 10 includes a curved pipe portion 12 and straight pipe portions 14, 16. The straight pipe portion 14 extends from one end of the curved pipe portion 12, and the straight pipe portion 16 extends from the other end of the curved pipe portion 12.

The pipe shaft SL1 of the straight pipe portion 14 and the pipe shaft SL2 of the straight pipe portion 16 intersect vertically. It should be noted that "vertical" does not necessarily have to be a perfect 90 degrees, and there may be a deviation to the extent that no problem occurs in practice.

Each of the straight pipe portions 14 and 16 can be inserted into the elbow joint 20. The pipe 10 and the elbow joint 20 are connected by inserting the straight pipe portion 14 or 16 into the elbow joint 20. On the other hand, another straight pipe is connected to the other end of the pipe 10 via a socket as described above. The pipe 10 and the elbow joint 20 may be connected after adjusting the lengths of the straight pipe portions 14 and 16 according to the widths of the inner corner 42 and the outer corner 44 and the dimensions of the elbow joint 20. .. The length of the straight pipe portions 14 and 16 can be adjusted by cutting.

The nominal diameters of the straight pipe portions 14 and 16 are preferably 10 mm or more and 25 mm or less. The radius of curvature of the axis of the curved tube portion 12 is preferably 8 mm or more, preferably 35 mm or less, more preferably 12 mm or more, and preferably 30 mm or less, from the viewpoint of a sense of unity in the corner and ease of molding. Further, as shown in FIG. 2, the distance A (or B) between the connection end of one straight pipe portion and the axis of the other straight pipe portion is preferably 30 mm or more and 130 mm or less. The width C (or D) of the tube 10 is preferably 35 mm or more and 150 mm or less.

FIG. 3 is a diagram for explaining the lengths of the straight pipe portions 14 and 16 in the pipe axial direction. With reference to FIG. 3, the left side shows the pipe structure 100 in which the pipe 10 and the elbow joint 20 are connected, and the right side shows the pipe structure 200 in which the elbow joints 20A and 20B are connected to each other.

With reference to the left side of FIG. 3, the length of the straight pipe portion 14 in the pipe axial direction is equal to or larger than the insertion allowance 22 of the elbow joint 20. The insertion allowance 22 is the depth of the recess for inserting the tube. By inserting the pipe to the depth of the recess, the elbow joint 20 and the pipe are connected. Further, the length of the straight pipe portion 16 in the pipe axis direction is also the insertion allowance 22 or more.

With reference to the right side of FIG. 3, the shortest length (reference length) that can be detoured by the piping structure 200 is L1 (distance between the axes P3 and P1 of the elbow joints 20A and 20B). With reference to the left side of FIG. 3 again, the length that can be detoured by the piping structure 100 is L2 (distance between the axis P2 and P1 of the elbow joint 20 and the socket 25). By using the pipe structure 100, the detour length is L3 shorter than that in the case of using the pipe structure 200. The length of the straight pipe portion 14 in the pipe axis direction is shorter than the case where L3 becomes 0 (zero). The same applies to the length of the straight pipe portion 16 in the pipe axis direction. For example, the length of L4 (distance between the axial center P3 of one joint and the end face P4 of the other joint) of the elbow joint 20A is 40 to 55 mm, and the length of L1 is 80 to 110 mm. Further, for example, when the lengths of the straight pipe portions 14 and 16 are about 20 to 25 mm and the outer diameter is about 13 to 27 mm, the length of L2 is 60 to 70 mm.

That is, since L3 becomes larger than 0 by using the piping structure including the pipe 10, a beautiful pipe can be realized even when the length between the inside corner and the outside corner of the building wall is shorter than the standard length. be able to.

<1-3. Piping example>
FIG. 4 is a diagram showing a pipe structure 105 including a pipe 10. As shown in FIG. 4, the piping structure 105 includes a pipe 10, an elbow joint 20, and a protective cover 50 that covers the pipe 10 and the elbow joint 20.

The protective cover 50 includes a cover 52 and a base 54. The base 54 is provided along the building wall 40, and the cover 52 is attached to the base 54 after covering the pipe 10 and the elbow joint 20. In the protective cover 50, the pipe 10 is arranged along the inside corner 42 and the elbow joint 20 is arranged along the outside corner 44.

In this example, since the pipe 10 is used, even if the length between the inside corner 42 and the outside corner 44 is less than the standard length, each pipe realizes a beautiful pipe along the building wall 40. ing.

FIG. 5 is a diagram showing a pipe structure 110 including the pipe 10. With reference to FIG. 5, in this example, the positions of the pipe 10 and the elbow joint 20 are interchanged as compared with the example shown in FIG. That is, in the protective cover 50, the elbow joint 20 is arranged along the inside corner 42, and the pipe 10 is arranged along the outside corner 44.

Even in this example, since the pipe 10 is used, a beautiful pipe is realized even if the length between the inside corner 42 and the outside corner 44 is less than the reference length.

<1-4. Example>
(1-4-1. Example 1)
FIG. 6 is a diagram for explaining the first embodiment of the pipe 10. In Example 1, the pipe 10 has a circular cross section, a pipe diameter of 13A, and is made of cross-linked polyethylene.

With reference to FIG. 6, the outer diameter R12 is 17 mm and the inner diameter R11 is 12.9 mm. The wall thickness T11 is 2.1 mm. The tube 10 has a 90-degree elbow shape. The radius of curvature (R) of the curved tube portion 12 is 5.5 mm on the inside and 22.5 mm on the outside. The length L11 in the pipe axis direction of the straight pipe portion 14 and the length L12 in the pipe axis direction of the straight pipe portion 16 are 20 mm or more and 65 mm or less, respectively.

According to the pipe 10 in the first embodiment, the lengths of the straight pipe portions 14 and 16 in the pipe axial direction are the insertion allowance 22 or more of the elbow joint 20, and L3 (FIG. 3) is larger than 0 (zero).

(1-4-2. Example 2)
FIG. 7 is a diagram for explaining the second embodiment of the pipe 10. In Example 2, the pipe 10 has a circular cross section, a pipe diameter of 16 A, and is made of cross-linked polyethylene.

With reference to FIG. 7, the outer diameter R22 is 21.5 mm and the inner diameter R21 is 16.275 mm. The wall thickness T21 is 2.65 mm. The tube 10 has a 90-degree elbow shape. The radius of curvature (R) of the curved tube portion 12 is 5.75 mm on the inside and 27.25 mm on the outside. The length L21 of the straight pipe portion 14 in the pipe axial direction and the length L22 of the straight pipe portion 16 in the pipe axial direction are 22 mm or more and 60 mm or less.

According to the pipe 10 in the second embodiment, the lengths of the straight pipe portions 14 and 16 in the pipe axial direction are the insertion allowance 22 or more of the elbow joint 20, and L3 (FIG. 3) is larger than 0 (zero).

<1-5. Features>
As described above, in the first embodiment, the length (L2 (FIG. 3)) of the pipe structure 100 formed by the connection between the straight pipe portion 14 and the elbow joint 20 is the shortest. The pipe structure 200 formed by connecting the elbow joints 20 to each other via a straight pipe is shorter than the length (L1) that detours in the connection direction. The same applies when the straight pipe portion 16 and the elbow joint 20 are connected.

Therefore, according to the pipe 10 according to the first embodiment, it is possible to realize a beautiful pipe even if the length between the inside corner 42 and the outside corner 44 is shorter than the reference length.

[2. Embodiment 2]
In the pipe 10 according to the first embodiment, no indication was provided on the surfaces of the straight pipe portions 14 and 16. In the pipe according to the second embodiment, a display is provided on the surface of the straight pipe portion. Hereinafter, the points different from those of the first embodiment will be mainly described.

FIG. 8 is a side view of the pipe 10A according to the second embodiment. As shown in FIG. 8, the pipe 10A includes a curved pipe portion 12 and straight pipe portions 14A and 16A. Indications 17 and 18 are provided on the surfaces of the straight pipe portions 14A and 16A, respectively. As an example, the displays 17 and 18 are scale-like displays. There is a predetermined interval between each scale. The indications 17 and 18 may be printed by ink, for example, or may be integrally molded at the time of injection molding of the tube 10A.

The length between the inside and outside corners of a building wall varies from place to place. For example, if the straight pipe portions 14A and 16A are too long, it is necessary to cut a part thereof. In the pipe 10A, indications 17 and 18 are provided on the surfaces of the straight pipe portions 14A and 16A, respectively. Each of the indications 17 and 18 is used by the person in charge of construction to recognize the reference position for cutting the pipe 10A. The person in charge of construction can easily cut the pipe to a desired length with reference to the indications 17 and 18.

As described above, in the pipe 10A according to the second embodiment, the indications 17 and 18 are provided on the surfaces of the straight pipe portions 14A and 16A, respectively. Therefore, the person in charge of construction can easily cut the pipe to a desired length while referring to the indications 17 and 18.

[3. Modification example]
Although the first and second embodiments have been described above, the present invention is not limited to the first and second embodiments, and various modifications can be made without departing from the spirit of the present invention. Hereinafter, a modified example will be described. However, the following modifications can be combined as appropriate.

<3-1>
In the first embodiment, the straight pipe portions 14 and 16 are both set to have a short length in which L3 (FIG. 3) is larger than 0. However, both the straight pipe portions 14 and 16 do not necessarily have to be so shortened. If one of the straight pipe portions 14 and 16 connected to the elbow joint 20 is short, the other may be long. The same can be said for the straight pipe portions 14A and 16A in the second embodiment.

Further, for example, both the straight pipe portions 14 and 16 may have a length in which L3 is smaller than 0. In this case, when the length between the inside corner and the outside corner is shorter than the standard length, the person in charge of construction cuts both or one of the straight pipe portions 14, 16 to make the length of the pipe 10. Will be adjusted. The same can be said for the straight pipe portions 14A and 16A in the second embodiment.

<3-2>
In the second embodiment, the indications 17 and 18 are provided on both surfaces of the straight pipe portions 14A and 16A, respectively. However, such a display does not necessarily have to be provided on both the straight pipe portions 14A and 16A, and may be provided on either one.

<3-3>
The elbow joint 20 is said to be a so-called one-touch joint, but it does not necessarily have to be a one-touch joint. For example, the elbow joint 20 may be a tightening joint or the like.

<3-4>
The strength of the curved pipe portion 12 may be increased by making the curved pipe portion 12 thicker than the straight pipe portions 14 and 16 and inflating the curved pipe portion 12.

<3-5>
The lengths of the straight pipe portions 14 and 16 do not have to be the same. The length may be changed, for example, the longer one may be a straight pipe portion to be inserted into the elbow joint 20, or a straight pipe portion to be cut for length adjustment.

10,10A pipe, 11 holes, 12 curved pipes, 14,14A, 16,16A straight pipes, 17,18 display, 20 elbow fittings, 22 insertion allowances, 30 straight pipes, 40 building walls, 42 inside corners, 44 Outer corner, 50 protective cover, 52 cover, 54, base, 90, 100, 105, 110, 200 piping structure, SL1, SL2 pipe shaft, P1, P2, P3 position, R11, R21 inner diameter, R12, R22 outer diameter, T11, T21 wall thickness.

Claims (4)

It is a piping structure provided in the area including the inside and outside corners of the building wall.
Elbow-shaped joints arranged along one of the inside corner and the outside corner,
An elbow-shaped pipe arranged along the other side of the inside corner and the outside corner and having one end connected to the fitting.
Equipped with
The length that the first piping structure formed by the connection between the pipe and the joint detours in the connection direction is such that the second piping structure formed by the connection between the joints via the shortest straight pipe is in the connection direction. Piping structure shorter than the detour length. The tube is
With the curved pipe part,
The first straight pipe portion extending from one end of the curved pipe portion and
The second straight pipe portion extending from the other end of the curved pipe portion and
Equipped with
The curved pipe portion is arranged along the inside corner or the outside corner of the building wall at the time of piping.
The pipe axis of the first straight pipe portion and the pipe axis of the second straight pipe portion intersect vertically.
The piping structure according to claim 1, wherein the length of each of the first and second straight pipe portions in the pipe axis direction is equal to or larger than the insertion allowance of the joint. The piping structure according to claim 2, wherein on the surface of at least one of the first and second straight pipe portions, a display indicating a reference position for cutting the pipe to a desired length is provided. The piping structure according to any one of claims 1 to 3, further comprising a protective cover covering the joint and the pipe.

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