JP3014613B2 - Startup piping method and startup piping members for flexible pipes from inside the slab - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of starting a flexible pipe (flexible water supply or hot water supply pipe, flexible electric conduit, etc.) from a slab, and a vertical pipe used in the slab. It relates to a lifting pipe member.

[0002]

2. Description of the Related Art When a flexible tube is embedded in a slab for piping, it is necessary to raise the end of the flexible tube above the slab surface. In the rising portion of the flexible tube, the position at which the flexible tube rises from the slab surface can be adjusted to some extent in order to improve workability when connecting the end of the flexible tube to another tube or the like. It is desirable. For this reason, FIG.
In addition, various start-up piping methods as shown in FIG. 13 have been implemented.

The construction method shown in FIG. 11 is disclosed in Japanese Utility Model Application Laid-Open No. 62-7724 and the like. First, an end of a flexible tube 11 is raised through a hollow container 13 having a wide upper end. Next, the support rod 17 is passed through a hole formed in the projection 15 of the hollow container 13, and the support rod 17 is tied to a reinforcing bar 19 and fixed. Thereafter, concrete is poured and solidified to form the slab 21. Next, a portion (above the two-dot chain line) protruding above the slab surface 21a of the hollow container 13 is cut off. As a result, the upper end of the hollow container 13 becomes a wide opening, so that the rising position of the flexible tube 11 can be adjusted within that range. The end of the flexible tube 11 is connected to another flexible tube or the like using a pipe joint.

In the method shown in FIG. 12, first, the end of the flexible tube 11 is inserted into a tubular body 23 made of cardboard or the like, and then, if necessary, a rag cloth or the like is filled in the gap between the tubular body 23 and the flexible tube 11. Then, the cylindrical body 23 is fixed to the reinforcing bar 19. Next, concrete is cast and solidified to form the slab 21. Then, the cylinder 2
The concrete around 3 is detached (broken with a chisel or the like), the cylindrical body 23 is removed, and the end of the flexible tube 11 is raised above the slab surface 21a. In this case, it is possible to adjust the rising position of the flexible tube 11 within the range where the concrete is attached.

In the method shown in FIG. 13, first, the end of the flexible tube 11 is pierced into the styrofoam block 25 and then the styrofoam block 25 is fixed to the reinforcing bar 19. Next, concrete is cast and solidified to form the slab 21. Thereafter, the concrete on the styrofoam block 25 and the styrofoam block 25 are removed, and the end of the flexible tube 11 is raised above the slab surface 21a. In this case, the rising position of the flexible tube 11 can be adjusted within the space formed by removing the Styrofoam block 25.

[0006]

However, the conventional flexible pipe start-up piping method has the following problems. In the method of FIG. 11, since the hollow container 13 formed by blow molding of plastic is used, not only the component cost is increased, but also the support rod 17 is used to fix the hollow container 13 to the reinforcing bar 19.
And so on, so that the fixing work is troublesome. In addition, since the hollow container 13 has mechanical strength enough to withstand the casting of concrete, the cutting operation after forming the slab requires time and effort. As a result, there is a problem that construction costs are expensive.

Further, the method of FIG. 12 has a problem that the work efficiency is poor and a large number of man-hours are required because the amount of concrete to be removed is large in removing the cylindrical body 23.
In particular, when the cylindrical body 23 is made of paper such as cardboard, the cylindrical body 23 sticks to the concrete, and it is difficult to remove it.

In the method shown in FIG. 13, the operation of removing the Styrofoam block 25 is troublesome, and the Styrofoam block 25 is scraped out in small pieces, so that it is difficult to clean up afterwards. Further, when the end of the flexible tube 11 is pierced into the block 25, the flexible tube is likely to meander or tilt, so that it is difficult to pierce the flexible tube 11 to prevent this. Further, since a considerably large Styrofoam block 25 is required to pierce the flexible tube 11,
After the block 25 is removed, the cavity becomes large, which may not only reduce the strength of the slab 21 but also increase the amount of backfill when the cavity is backfilled with mortar.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a method for easily and inexpensively setting up a flexible pipe from inside a slab and a starting pipe member used for the method. Is to do.

[0010]

In accordance with the present invention, a method for setting up a flexible tube from inside a slab according to the present invention comprises the steps of: Made in a pipe shape having a resilient wall thickness changes
Put a startup piping member, that part, one end of the startup pipe member within the slab, after the other end side is arranged so as to be located outside the slab, the concrete was Da設and solidified to form a slab It is characterized by the following (claim 1).

After the slab is formed, the rising pipe member is left as it is, the rising piping member protruding above the slab surface is cut off, and the rising pipe member including the portion buried in the slab is raised. There is a case where the entire lifting pipe member is pulled out. , In the case of the resilient in the start-up piping member that is deformable range having, within the scope of the cavity formed by the withdrawal of the startup piping member in the case of, for adjusting the rise position of the flexible tube It is possible.
It is to be noted that is suitable when the present invention is applied to a plumbing method for hot and cold water supply equipment. Is suitable when the present invention is applied to a plumbing method performed in accordance with the provision that no combustible material should be left around the conduit.

In particular, when the flexible tube is covered with a rising pipe member at an oblique position at a portion where the flexible tube rises from the inside of the slab to the outside of the slab, the slab formed by the pipe-shaped rising pipe member is provided. Since the shape of the opening in the surface is substantially elliptical, the adjustment range of the rising position of the flexible tube can be increased.

[0013] Another start-up piping method according to the present invention is such that the thickness of a flexible polymer pipe formed in a slab is changed from the inside of the slab to the outside of the slab .
After placing the pipe- shaped rising pipe member having elasticity and placing the rising pipe member on its side, the lower half is positioned inside the slab and the upper half is positioned outside the slab. The concrete is cast and solidified to form a slab (claim 2).

In this method, since the lower half of the laid-up rising pipe member is merely buried in the slab, after the slab is formed, the rising piping member is taken out of the slab and the end of the flexible pipe is removed. What is necessary is just to remove a starting piping member from a part. It is desirable that the rising pipe member used at this time has a cross section in which at least the lower half gradually narrows toward the lower end. In particular, those having a circular or ring-shaped cross section are preferable. With such a shape, the rising pipe member can be easily taken out of the slab.

The startup pipe member for use in the method of the present invention, made of closed cell foamed polymer, pipes Jodea Rukoto preferably has a resilient wall thickness changes. With closed-cell foamed polymer, cells are closed (not continuous)
It is foamed plastic or foamed rubber.

Further, it is more preferable that the rising pipe member used in the method of the present invention is formed by integrally forming a non-foamed polymer film layer on the outer periphery of a pipe made of a foamed polymer.

[0017]

According to the method of the present invention, it is only necessary to cover a portion of the flexible tube rising from the inside of the slab to the outside of the slab with a pipe-like rising pipe member, so that the end of the flexible tube is pierced into the styrofoam block. ,It does not take time and effort. In addition, since the start-up piping member is in a pipe shape, a long continuous product can be cut into an appropriate length and used, and the cost is lower than when a blow molded product as shown in FIG. 11 is used. Down is possible. The fixing to the rebar is only required to be tied with a wire or the like, which is simple. Further, since no concrete hanging work is required after the slab is formed, the working efficiency is good and the construction cost can be reduced.

Further, according to the construction method of the present invention, a rising pipe member having an elasticity whose thickness changes can be compressed and deformed and easily taken out of the slab, and a cavity formed by taking out the rising pipe member can be obtained. Is small, so backfilling is easy.

In particular, if a foamed polymer material is used as the rising pipe member, it can be easily cut with a cutter knife or the like, so that the work of cutting out the portion of the rising pipe member that is above the slab surface can be easily performed. be able to. Further, since the closed-cell foamed polymer does not penetrate moisture, even if a part of the rising pipe member is left in the slab, there is no fear that mold will grow.

When a non-foamed polymer film layer integrally having a non-foamed polymer film layer around the outer periphery of a pipe made of a foamed polymer is used as a start-up pipe member, the non-foamed polymer film layer is easily peeled from concrete. Can be easily pulled out of the device. Therefore, the removal operation is extremely simple as compared with the case where the styrofoam block is removed, and the small pieces are not scattered, so that the cleaning is easy. In addition, it is also possible to reuse the drawn-out startup piping member. Further, the cavity formed by pulling out the rising pipe member is generally backfilled with mortar or the like after adjusting the rising position of the flexible tube. However, since the volume of the cavity is small, backfilling is easy. It is.

[0021]

【Example】

[Embodiment 1] FIG. 1 shows an embodiment of a start-up piping member used in the method of the present invention. The rising pipe member 27 is composed of a pipe 29 made of closed-cell foamed polyethylene. The inner diameter of the rising pipe member 27 is substantially the same as the outer diameter of the flexible tube. The rising pipe member 27 can be easily manufactured by continuously producing a long closed-cell foamed polyethylene pipe and cutting it to a required length.

[Embodiment 2] FIG. 2 shows another embodiment of a rising pipe member used in the method of the present invention. The rising pipe member 27 is a pipe 29 made of closed-cell foamed polyethylene.
Is provided with a non-foamed plastic film layer 31 integrally on the outer periphery of. The inner diameter of the rising pipe member 27 is substantially the same as the outer diameter of the flexible tube.

The non-foamed plastic film layer 31 is provided for facilitating pulling out of the rising pipe member 27 from the concrete slab, and is preferably made of a polyolefin-based material such as polyethylene or polypropylene. Especially the non-foamed plastic film layer 31
When the embossing process is performed on the base member, it is easier to pull out the rising pipe member 27. Start-up piping member 2 of FIG.
No. 7 can be easily manufactured by continuously producing a long composite pipe in which a non-foamed plastic film layer is integrally provided on the outer periphery of a closed-cell foamed polyethylene pipe and cutting it into a required length.

Embodiment 3 Next, an embodiment of a start-up piping method according to the present invention will be described with reference to FIGS. In this method, as shown in FIG. 3, a flexible tube 11 to be embedded in a slab is piped where a reinforcing bar 19 for forming a slab and a mold frame 33 are assembled. The end of the flexible tube 11 rises so as to protrude above the slab surface. The rising direction may be vertical, but is preferably inclined as shown.

Next, as shown in FIG. 4, a rising pipe member 27 shown in FIG. 1 or 2 is put on the end of the flexible tube 11, and the rising pipe member 27 is fixed to the reinforcing steel 19 with a wire 35 or the like. I do. At this time, the rising pipe member 27 is arranged so that one end is located inside the slab and the other end is located outside the slab.
It is desirable that the upper end of the rising pipe member 27 be covered with a gum tape 37 or the like so that concrete or the like does not enter the flexible tube 11. However, when the rising length of the flexible tube 11 is long and the end portion of the flexible tube 11 projects sufficiently above the upper end of the rising pipe member 27, there is no possibility that concrete or the like enters the flexible tube 11. Therefore, sealing with a gum tape or the like can be omitted.

Next, as shown in FIG. 5, concrete is poured into the formwork 33 and solidified to form the slab 21.
After that, when the portion of the rising pipe member 27 protruding above the slab surface 21a is cut off, a state where the end of the flexible tube 11 rises from the slab surface 21a is obtained as shown in FIG. Since the start-up piping member 27 is a pipe made of foamed polyethylene, it can be easily cut with a cutter knife or the like, and the cutting operation is easy.

In the state shown in FIG. 6, the end of the flexible tube 11 is thick.
It is possible to adjust the rising position within a range in which the rising piping member 27 having the resiliency that changes can be deformed.
In particular, when the flexible tube 11 is raised diagonally, the opening of the slab surface 21a formed by the rising pipe member 27 becomes substantially elliptical, and thus the adjustment of the rising position of the flexible tube 11 is more difficult than when the flexible tube 11 is raised vertically. There is an advantage that the range can be widened. Another flexible tube or the like is connected to the upper end of the flexible tube 11 by a pipe joint.

As described above, the portion of the rising pipe member 27 protruding above the slab surface 21a is cut off by the ordinary method, but the rising length of the flexible tube 11 is long and the end portion of the flexible tube 11 is cut off. Is projected above the upper end of the riser piping member 27, the portion of the riser piping member 27 protruding above the slab surface 21a may not be cut off.

[Embodiment 4] Next, a description will be given of an embodiment in which the rising pipe member is pulled out of the slab. in this case,
The rising piping member 27 with the non-foamed plastic film layer 31 shown in FIG. 2 is used. 3 to 5 are the same as in the third embodiment. After the slab 21 is formed as shown in FIG. 5, the rising pipe member 27 is pulled out, as shown in FIG.

The rising pipe member 27 is a non-foamed plastic film layer 31 whose outer peripheral surface is easily peeled off from concrete.
, It is possible to pull out the slab 21 relatively easily. In addition, the start-up piping member 27
The fact that most of the wall thickness is made of easily deformable expanded polyethylene, and that the outer diameter is easily reduced when pulled, is also considered to be one of the causes of pulling out the slab relatively easily.

In the state shown in FIG. 7, since a cavity 39 is formed around the flexible tube 11, the end of the flexible tube 11 is
It is possible to adjust the start-up position within the range.
When the flexible tube 11 is raised obliquely, the adjustable range of the rising position of the flexible tube 11 can be widened as in the above-described embodiment. The cavity 39 is usually backfilled with mortar or the like after adjusting the rising position of the flexible tube 11. Since the cavity 39 is only formed concentrically around the flexible tube 11, the volume is small and the backfill amount is small. The method of this embodiment is suitable for the construction of a flexible tube for passing an electric wire, that is, an electric conduit.

Embodiment 5 Next, another embodiment of the start-up piping method of the present invention will be described with reference to FIGS. Also in this case, the non-foamed plastic film layer 3 shown in FIG.
It is preferable to use a start-up piping member 27 with one. It is the same as the third embodiment up to the point where the rising pipe member 27 is put on the end of the flexible tube 11. The rising pipe member 27 has a ring-shaped cross section. After this, the starting piping member 2
7 is laid on its side, the lower half is positioned inside the slab, and the upper half is positioned outside the slab.
Fixed to. The end of the start-up piping member 27 is a gum tape 3
Block with 7 mag. In this state, concrete is poured into the formwork 33 and solidified to form the slab 21.

Thereafter, the rising pipe member 27 is connected to the slab 21.
From the end of the flexible tube 11
FIG. 9 shows the state after removing 7. Start-up piping member 27
Is in a state in which the lower half is buried in the slab 21 in a lying state, so that it can be easily taken out from the slab 21.
Further, since the cavity 39 formed by taking out the rising pipe member 27 is small in depth and small in size, it can be easily backfilled with mortar or the like. The method of this embodiment is also suitable for the construction of a flexible tube for passing an electric wire, that is, an electric conduit.

[Embodiment 6] FIG. 10 shows still another embodiment of a rising pipe member used in the method of the present invention. The rising pipe member 27 has a cap 41 attached to one end. Otherwise, the starting piping member 27 shown in FIG.
Therefore, the same parts are denoted by the same reference numerals. By attaching the cap 27 in this way, it is possible to save the trouble of closing the opening at the upper end of the rising pipe member 27 with a gum tape or the like at the construction site. The start-up piping member 27 of FIG. 1 may be configured to have a cap.

As is clear from the above embodiments, the present invention includes the following embodiments. (1) A method in which a portion of a rising pipe member that is above the slab surface is cut off after the slab is formed by the rising piping method according to claim 1. (2) The starting piping method according to claim 1 or 2, wherein the starting piping member according to claim 3 or 4 is used as the starting piping member. (3) In the start-up piping method according to claim 1, the start-up piping member according to claim 4 is used as a start-up piping member, and after forming a slab, a portion where the start-up piping member is embedded in the slab is removed. What is to be pulled out and removed. (4) The rising pipe method according to claim 1, wherein the flexible pipe is raised diagonally and the rising pipe member is disposed diagonally. (5) The rising piping member according to (4), wherein the non-foamed polymer film layer is embossed.

[0036]

As described above, according to the present invention, a pipe-shaped rising pipe made of a foamed polymer and having a variable thickness is provided at a portion where the flexible tube rises from the inside of the slab to the outside of the slab. Since the slab is formed by covering the members, after the slab is formed, within the range in which the rising pipe member can be deformed,
Further, when removing the rising pipe member, the rising position of the flexible tube can be adjusted within the range of the cavity formed thereby.

Further, since the starting piping member is in the shape of a pipe, it can be manufactured at low cost, and the cost of parts can be reduced. Furthermore, there is no need to attach the rising pipe member to the flexible pipe or fix the rising pipe member to a reinforcing bar, etc., and it is not necessary (if any) to suspend concrete after the slab is formed. Since the start-up piping member can be easily removed by cutting or drawing, the work efficiency is good and the construction cost can be reduced.

In particular, when a pipe made of a closed-cell foamed polymer or a pipe in which a non-foamed polymer film layer is integrally coated on its outer periphery is used as a starting pipe member, the pipe can be easily cut with a cutter knife or the like. The operation of cutting off the portion protruding from the slab surface can be easily performed.

When a non-foamed polymer film layer is integrally provided on the outer periphery of a pipe made of a foamed polymer as a start-up piping member, the non-foamed polymer film layer is easily peeled off from concrete. It can be easily pulled out of the slab. In addition, it is also possible to reuse the drawn-out startup piping member.
Further, when the cavity formed by pulling out the rising pipe member is backfilled with mortar or the like, the volume of the cavity is small, so that the amount of backfill is small.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side view showing one embodiment of a rising pipe member used in the method of the present invention.

FIG. 2 is a partially cut-away side view showing another embodiment.

FIG. 3 is a sectional view showing an initial stage showing one embodiment of the method of the present invention.

FIG. 4 is a sectional view showing the next stage of FIG. 3;

FIG. 5 is a sectional view showing the next stage of FIG. 4;

FIG. 6 is a sectional view showing a final stage next to FIG. 5;

FIG. 7 is a sectional view showing a final stage showing another embodiment of the method of the present invention.

FIG. 8 is a sectional view showing an intermediate stage showing still another embodiment of the method of the present invention.

FIG. 9 is a sectional view showing a step subsequent to FIG. 8;

FIG. 10 is a partially cut-away side view showing still another embodiment of the rising pipe member used in the method of the present invention.

FIG. 11 is a sectional view showing an example of a conventional method.

FIG. 12 is a cross-sectional view showing another example of a conventional method.

FIG. 13 is a sectional view showing still another example of the conventional method.

[Explanation of symbols]

 11: Flexible tube 19: Reinforcing bar 21: Slab 21a: Slab surface 27: Start-up piping member 29: Pipe made of closed-cell foamed polyethylene 31: Non-foamed plastic film layer 39: Cavity

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-35515 (JP, A) JP-A-3-230714 (JP, A) JP-A-2-68963 (JP, U) JP-A-2-69 146924 (JP, U) Shokai Sho 62-7724 (JP, U) Shokai Hei 3-33138 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 3/26

Claims (4)

(57) [Claims] 1. A pipe- shaped start- up pipe made of a foamed polymer and having an elasticity with a variable thickness , at a start-up portion of the flexible pipe (11) piped inside the slab from the inside of the slab to the outside of the slab. After placing the member (27) and arranging the portion so that one end of the riser piping member (27) is located inside the slab and the other end is located outside the slab, concrete is poured and solidified, and the slab ( 21) A method of starting up a flexible pipe from inside a slab, the method comprising forming step 21). 2. A pipe- shaped start- up pipe made of a foamed polymer and having an elasticity with a variable thickness , at a start-up portion of the flexible pipe (11) piped into the slab from inside the slab to outside the slab. After placing the member (27) and laying the rising pipe member (27) on its side, the lower half is placed inside the slab and the upper half is placed outside the slab, and then concrete is poured. And forming a slab (21) by solidifying the slab (21). 3. A member for covering the start-up portion of the slab of the flexible tube to be piped to the slab to the slab outside pipe having a resilient steel closed cell foamed polymer, the thickness changes ( 29) Jodea startup piping member of the flexible tube in Rukoto from the slab, characterized in. 4. A pipe (29) made of a foamed polymer and having elasticity with a variable wall thickness , which is a member for covering a rising portion of a flexible tube provided in a slab from inside the slab to outside the slab. A flexible pipe rising from the inside of the slab, wherein the non-foamed polymer film layer (31) is integrally provided on the outer periphery of the flexible pipe.