JPH0791566A - Rising-up unit for indoor dual pipeline and construction method therefor - Google Patents

Abstract

PURPOSE:To make the axial direction of the end of a main pipe approach the axial direction of a main pipe connecting portion of a pipe coupling so as to prevent bending of the main pipe by containing the main pipe in the vicinity of the end thereof inside a rising-up guide pipe in a state forcibly bent at a predetermined curvature. CONSTITUTION:A rising-up guide pipe 15 is connected to the end of a sheath pipe 13 laid along a predetermined path, and is fixed to a given position of a base floor 11. The rising-up guide pipe 15 is provided at one end thereof with the sheath pipe 13 and a connecting portion 17 and at the other end thereof with a screw capable of screwing a cap on the outer periphery of a rising-up straight pipe 33, so as to be secured to a fixing plate 37 on the base floor 11. In construction, after the rising-up guide pipe 15 is fixed, the floor plate 21 is fitted, the main pipe 25 is inserted into the sheath pipe 13 and the rising-up guide pipe 15 and is inserted in the vicinity of the end thereof into a bend holding pipe 45, to be then bent at a curvature restricted by the bend holding pipe 45. A pipe coupling 27 is fixed to the end of the main pipe 25 projecting from the outlet end of the bend holding pipe 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rising part of an indoor double pipe and a construction method thereof.

[0002]

2. Description of the Related Art Recently, double pipes in which a plastic main pipe is housed in a plastic pipe with a corrugated flexible pipe have been used for indoor water pipes.

The piping method of this double pipe and the structure of the rising portion from the floor will be described with reference to FIGS. 11 to 15. First, as shown in FIG. 11, a sheath pipe 13 is laid along a predetermined path on a foundation floor (concrete slab or the like) 11 of a building before a floor board is stretched. Next, the rising guide pipe 15 is connected to the end of the sheath pipe 13 at a position where the pipe is raised. Reference numeral 17 denotes a connecting portion between the sheath pipe 13 and the rising guide pipe 15. After that, the rising guide pipe 15 is fixed to a predetermined position on the foundation floor 11 by the fixing bracket 19.

In this state, the floor board 21 is stretched as shown in FIG. A hole 23 is previously formed in the floor plate 21 at a position corresponding to the upper end portion of the rising guide tube 15. Floorboard from foundation floor 11
Since the height of 21 is often different depending on the building, the rising straight pipe portion of the rising guide pipe 15 is made longer so as to be able to cope with the change in the height of the floor plate 21. Therefore, in a normal case, the upper end portion of the rising guide tube 15 projects from the upper surface of the floor plate 21. Therefore, after this, the protruding portion of the rising guide tube 15 is cut, and the upper end of the rising guide tube 15 is aligned with the upper surface of the floor plate 21 as shown in FIG.

Since the sheath pipe 13 is now installed between the foundation floor 11 and the floor plate 21, the main pipe 25 is inserted into the sheath pipe 13 and the rising guide pipe 15 as shown in FIG. Then, the main pipe 25 is laid. At this stage, the end of the main pipe 25 is pulled out from the upper end of the rising guide pipe 15, and then the floor fitting pipe joint 27 is attached to the end of the main pipe 25. Next, as shown in FIG. 15, push the end of the main pipe 25 into the rising guide pipe 15,
The flange portion 29 of the floor fitting type pipe joint 27 is fixed to the floor plate 21 by screws.

This completes the piping work for the plastic double pipe. After this, the metal pipe 31 rising from the floor is connected to the floor-mounted pipe joint 27.

Although the above is the case where the double pipe is installed between the foundation floor and the floor plate, the double pipe may be installed between the foundation wall and the wall plate in the same manner.

[0008]

As shown in FIG. 15, the rising portion of the indoor double pipe constructed as described above has a foundation floor.
There is no problem if the height H of the floorboard 21 from 11 is higher than a certain level. However, as shown in FIG. 16, when the height H of the floorboard 21 from the foundation floor 11 becomes low, a floor-mounting type pipe joint 27 is attached to the end of the main pipe 25, and the end of the main pipe 25 rises up.
When pushed in, the main pipe 25 is strongly bent at the mouth A of the pipe joint 27 due to the rigidity of the main pipe 25. Therefore, an unreasonable force is applied to the connecting portion between the main pipe 25 and the pipe joint 27, and water leakage may occur during long-term use.

Such a problem is that when a double pipe is installed between the foundation wall and the wall board, the height of the wall board from the foundation wall (in this case, the horizontal distance, but the relationship between the foundation floor and the floor board is It also occurs when the height is collectively low.

[0010]

DISCLOSURE OF THE INVENTION The present invention provides a rising part of an indoor double pipe which solves the above-mentioned problems, and its construction is between a foundation floor and a floor board or a foundation wall and a wall board. A laid sheath pipe, a rising guide pipe fixed to a foundation floor or a foundation wall, one end connected to an end of the sheath pipe, and the other end located in a hole formed in the floor plate or wall plate,
Indoors with a main pipe inserted into the sheath pipe and the rising guide pipe, and a pipe joint attached to the end of the main pipe and fixed to the end of the rising guide pipe or the edge of the hole of the floor plate or wall plate. In the rising part of the heavy pipe, in the rising guide pipe, a bend that keeps the vicinity of the end of the main pipe in a bent state so that the center axis of the end of the main pipe approaches the center axis of the main pipe connecting part of the pipe joint. A holding tube is provided.

The present invention also provides a method for constructing a rising portion of an indoor double pipe as described above, the construction of which is:
Attaching the rising guide pipe to the end of the sheath pipe and fixing the rising guide pipe at a predetermined position on the foundation floor or foundation wall, rising of the rising guide pipe in advance at a prescribed height from the foundation floor or foundation wall. The process of placing a floor plate or wall plate with holes at positions corresponding to the straight pipe part, inserting the main pipe into the sheath pipe and the rising guide pipe and projecting the end of the main pipe and its vicinity from the upper end of the rising guide pipe Process, inserting the vicinity of the end of the main pipe into the bending holding pipe and bending it to a curvature regulated by the bending holding pipe, and attaching a pipe joint to the end of the main pipe, main pipe bent by the bending holding pipe After pushing in the vicinity of the end portion into the rising guide pipe, the pipe joint is fixed to the upper end of the rising guide pipe or the edge of the hole of the floor plate or the wall plate.

In the construction method of the present invention, there may be a case where a step of cutting the rising straight pipe portion of the rising guide pipe is included according to the level of the floor board or the wall board after the step of stretching the floor board or the wall board. is there.

[0013]

According to the present invention, since the vicinity of the end of the main pipe is housed in the rising guide pipe while being forcibly bent to a predetermined curvature by the bending holding pipe, the main pipe is free inside the rising guide pipe. The central axis direction of the end of the main pipe comes closer to the direction of the central axis of the main pipe connecting portion of the pipe joint, and the main pipe is not strongly bent at the mouth of the pipe joint.

However, it is difficult to make the end portion of the main pipe perpendicular to the floor plate or the wall plate by simply bending the vicinity of the end portion of the main pipe by the bending holding pipe and storing it in the rising guide pipe. In order to further reduce the bending of the main pipe at the mouth of the joint, it is desirable to use a pipe joint in which the central axis of the main pipe connecting portion is inclined in the rising direction of the main pipe end.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 8 show a rising portion of an indoor double pipe according to an embodiment of the present invention according to a construction order. First, as shown in FIG. 1, a rising guide pipe 15 is connected to an end portion of a sheath pipe 13 laid along a predetermined path, and the rising guide pipe 15 is fixed at a predetermined position on the foundation floor 11. 2 is a plan view of the rising guide tube 15, and FIG. 3 is A of FIG.
It is a sectional view taken along the line A.

The rising guide pipe 15 has a sheath pipe 13 at one end.
And a threaded portion 35 on the outer circumference of the rising straight pipe portion 33 on the other end side, and a fixing plate 37 to the foundation floor 11 is integrally provided on the bottom portion. To fix to the foundation floor 11, screw the fixing plate 37
By fixing at 39. The fixing plate 37 has a positioning hole 41 formed at a position where the central axis of the rising straight pipe portion 33 passes, and by aligning the positioning hole 41 with the position mark attached to the foundation floor 11, the rising guide pipe 15 is formed. It can be fixed in the correct position. The rising straight pipe section 33
Two parallel planes 43a, 43b facing each other for preventing rotation of a pipe joint, which will be described later, are formed on the inner surface (see FIG. 2).
reference).

After fixing the rising guide pipe 15, the floor plate 21 is stretched as shown by the alternate long and short dash line in FIG. There is a hole in the floorboard 21 in advance.
23 are formed. Since the rising straight pipe part 33 is formed to be long so as to be able to cope with the change in the height of the floor plate 21, after that, the part of the rising straight pipe part 33 protruding from the upper surface of the floor plate 21 is cut off.

Next, as shown in FIG. 4, the main pipe 25 is inserted into the sheath pipe 13 and the rising guide pipe 15, and the end portion of the main pipe 25 is protruded from the upper end of the rising guide pipe 15 by an appropriate length. . Next, the vicinity of the end of the main pipe 25 is inserted into the bending holding tube 45, and is bent to a curvature regulated by the bending holding tube 45. An enlarged diameter portion 47 is formed at the end of the bending holding tube 45 on the main tube insertion side to facilitate insertion of the main tube 25.

Next, the pipe joint 27 is attached to the end of the main pipe 25 protruding from the outlet end of the bent holding pipe 45. This pipe fitting 27
As shown in FIG. 5, the central axis of the main pipe connecting portion 27a is inclined with respect to the central axis of the metal pipe connecting portion 27b.
This inclination angle θ may be set in the range of 10 ° to 25 °, preferably 10 ° to 20 °. Metal pipe connection part 27b of pipe joint 27
A flange portion 29 is formed on the outer periphery of the. The lower half portion of the outer peripheral surface of the flange portion 29 is formed to have a size that fits inside the rising straight pipe portion 33, and the upper half portion has a size equal to or slightly smaller than the outer diameter of the rising straight pipe portion 33. Is formed to have a size to be mounted on the upper end surface of the rising straight pipe portion 33.

When the vicinity of the end of the main pipe 25 to which the bending holding pipe 45 and the pipe joint 27 are attached as described above is pushed into the rising guide pipe 15, the result is as shown in FIG. In this state, the vicinity of the end of the main pipe 25 is held in a bent state by the bending holding pipe 45, and the main pipe connecting portion 27a of the pipe joint 27 is connected to the main pipe 25.
Since the end of the main pipe 25 is inclined in the rising direction, the center axis of the end of the main pipe 25 and the center axis of the main pipe connecting portion 27a of the pipe joint substantially coincide with each other. Therefore, the main pipe 25 is not strongly bent at the mouth of the pipe joint 27, and a reasonably connected state can be obtained.
In addition, a flat surface portion 49 formed on the lower half of the outer peripheral surface of the flange portion 29.
Is sandwiched between the two flat surfaces 43a and 43b (see FIG. 2) on the inner surface of the rising straight pipe portion 33, so that the pipe joint 27 does not rotate with respect to the rising guide pipe 15.

After this, as shown in FIG. 7, the end portion of the metal pipe 31 which rises vertically from the floor plate 21 is screwed and connected to the metal pipe connecting portion 27a of the pipe joint 27. A cap 51 is fitted in advance on the outer circumference of the metal tube 31, and when the cap 51 is pushed down and screwed into the threaded portion 35 of the rising guide tube 15 to be tightened, the result is as shown in FIG. In this state, the rising guide tube
The flange portion 29 is sandwiched between the upper end surface of 15 and the cap 51, and the pipe joint 27 is fixed to the rising guide pipe 15.

In the above embodiment, the height H of the floorboard 21 from the foundation floor 11 (see FIG. 6) is relatively low.
When the height H is relatively high, the result is as shown in FIG. That is, in this case, the distance D between the mouth of the pipe joint 27 and the end of the bent holding pipe 45 may be set larger than that in the above-described embodiment.
Alternatively, a method may be used in which the bending holding tube 45 is made long in advance and is cut into a length suitable for the height H before use.

FIG. 10 shows another embodiment of the present invention. This embodiment is different from the above embodiment in that the flange portion of the pipe joint 27 is
29 is enlarged, and the flange portion 29 is screwed to the floor plate 21. Since the pipe joint 27 can be fixed to the floor plate 21 in this way, it is not necessary to form a threaded portion on the outer periphery of the rising straight pipe portion 33 of the rising guide pipe 15. Since other configurations are the same as those in FIG. 6, the same portions are denoted by the same reference numerals and the description thereof will be omitted.

In each of the above embodiments, the case where the double pipe is installed between the foundation floor and the floor plate has been described. However, the present invention is similarly applied to the case where the double pipe is installed between the foundation wall and the wall plate. It is possible.

[0025]

As described above, according to the present invention, the main pipe is stored in the rising guide pipe in a state where the end portion of the main pipe is forcibly bent by the bending holding pipe, so that the main pipe is free. Since the central axis direction of the end of the main pipe approaches the central axis direction of the main pipe connecting portion of the pipe joint, the main pipe is prevented from being strongly bent at the mouth of the pipe joint, as compared with the case where the main pipe is housed in the rising guide pipe. If the central axis of the main pipe connecting portion is inclined toward the rising direction of the main pipe end as the pipe joint, the bending of the main pipe at the mouth of the pipe joint can be further reduced. Therefore, according to the present invention, it is possible to prevent a water leakage accident or the like at the rising portion of the indoor double pipe, and improve the reliability.

[Brief description of drawings]

FIG. 1 is a side view showing a first stage of a method for constructing a rising portion of an indoor double pipe according to an embodiment of the present invention.

FIG. 2 is a plan view of the rising guide tube in FIG.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a cross-sectional view showing the next step of FIG.

5 is a sectional view of the pipe joint in FIG.

6 is a cross-sectional view showing the next step of FIG.

7 is a cross-sectional view showing the next step of FIG.

FIG. 8 is a side view showing a rising portion of an indoor double pipe according to an embodiment of the present invention completed by the above construction method.

FIG. 9 is a sectional view showing a rising portion of an indoor double pipe according to another embodiment of the present invention.

FIG. 10 is a sectional view showing a rising portion of an indoor double pipe according to still another embodiment of the present invention.

FIG. 11 is a side view showing a first stage of a conventional indoor double-pipe rising construction method.

FIG. 12 is a side view showing the next step of FIG. 11.

FIG. 13 is a side view showing the next step of FIG. 12.

FIG. 14 is a cross-sectional view showing the next step of FIG. 13.

FIG. 15 is a cross-sectional view showing the next step in FIG.

FIG. 16 is a cross-sectional view showing a completed state of a rising portion of a conventional indoor double pipe.

[Explanation of symbols]

 11: Foundation floor 13: Saya pipe 15: Rise guide pipe 21: Floor plate 23: Hole 25: Main pipe 27: Pipe joint 27a: Main pipe connection 27b: Metal pipe connection 29: Flange portion 31: Metal pipe 33: Rise Straight pipe part 35: Screw part 37: Fixing plate 41: Positioning hole 45: Bending holding pipe 47: Expanding part 51: Cap

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tadahiro Sato 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (7)

[Claims] 1. A sheath pipe laid between a foundation floor and a floor plate or between a foundation wall and a wall plate; and a sheath pipe fixed to the foundation floor or the foundation wall, one end of which is connected to an end of the sheath pipe and the other end of which is the floor plate or wall The rising guide pipe located in the hole formed in the plate, the main pipe inserted in the sheath pipe and the rising guide pipe, and the end of the main pipe attached to the end of the rising guide pipe or the hole of the floor plate or wall plate In the rising part of the indoor double pipe equipped with the pipe joint fixed to the edge of, in the rising guide pipe, the central axis of the end of the main pipe is brought close to the central axis of the main pipe connecting part of the pipe joint, A rising part of an indoor double pipe, which is provided with a bending holding pipe for holding the end portion of the main pipe in a bent state. 2. The rising portion of the indoor double pipe according to claim 1, wherein the central axis of the main pipe connecting portion of the pipe joint is inclined in the rising direction of the main pipe end portion. . 3. The rising portion of the indoor double pipe according to claim 1, wherein the pipe joint has a flange portion, and the flange portion rises by a cap screwed to the upper end portion of the rising guide pipe. Characterized by being fixed to a guide tube. 4. The rising portion of the indoor double pipe according to claim 1 or 2, wherein the pipe joint has a flange portion, and the flange portion is fixed to an edge of a hole of a floor plate or a wall plate. Characterized by. 5. The rising part of the indoor double pipe according to any one of claims 1 to 4, wherein the rising guide pipe is fixed to the foundation floor at a central axis of the rising straight pipe part of the rising guide pipe. Characterized in that a positioning hole indicating the position of is formed. 6. The rising portion of the indoor double pipe according to any one of claims 1 to 5, wherein the bending holding pipe has an enlarged diameter portion at an end portion on the main pipe insertion side. . 7. A step of attaching a rising guide pipe to an end portion of a sheath pipe and fixing the rising guide pipe to a predetermined position of a foundation floor or a foundation wall, in advance at a predetermined height from the foundation floor or the foundation wall. A process of stretching a floor plate or wall plate with holes at positions corresponding to the rising straight pipe part of the rising guide pipe, inserting the main pipe into the sheath pipe and the rising guide pipe, and raising the end of the main pipe and its vicinity to the rising guide pipe. The process of projecting from the upper end of the main pipe, the end of the main pipe is inserted into the bending holding pipe to bend to the curvature regulated by the bending holding pipe, and the pipe joint is attached to the end of the main pipe. After pushing the bent end part of the main pipe into the rising guide pipe and then fixing the pipe joint to the upper end of the rising guide pipe or to the edge of the hole in the floor plate or wall plate, Rise of piping Construction methods.