JPH0650012B2 - Pipe drawing method from inside the slab to outside the slab and pipe drawing tool used therefor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for drawing a pipe from inside a slab to outside a slab and a pipe drawing tool used for the method.

(Prior Art) Conventionally, for piping that connects a pipe from inside the slab to a pipe outside the slab, as shown in Fig. 12, first, the support column (30) is fixed to the rebar (22) that is reinforced inside the slab. Then, one end of the pipe (20) piped in the slab is bound to the column (30), concrete is placed in such a state, and after the slab is formed, it is connected to the pipe outside the slab.

Also, as shown in Fig. 13, draw the pipe (2
Insert one end of (0) into the short pipe (40) with a large diameter,
Fill the gap between the short pipe (40) and the pipe (20) with a rag cloth (41), etc.
Fix one end of the short pipe (40) by inclining it so that it is substantially flush with the slab surface, place concrete, and after forming the slab, remove the short pipe (40) by mounting concrete and pipe (20 The method of pulling out one end of () and connecting it to the pipe outside the slab was also adopted.

However, in the case of the conventional method shown in Fig. 12, one end of the pillar (30) or pipe (20) protrudes from the slab surface when pouring concrete, so it is very disturbing to level the pouring concrete. It is very time-consuming, and the pillars (30) and pipes (20) often fall down due to the poured concrete, and one end of the pipe (20) is embedded in the slab, and the concrete is later removed. There was a problem of having to hang. In addition, after the slab is formed, it is necessary to remove the pillars (30) protruding from the slab surface, which requires labor.

Even in the case of the conventional method as shown in FIG. 13, the amount of concrete to pull out one end of the pipe (20) was very large, and the work was very troublesome. In addition, there is a problem that one end of the short pipe (40) may be buried in the concrete, and the location of the vine may not be known later.

On the other hand, as shown in FIG. 14, as a method of fixing one end of the pipe (20) so as not to project from the slab surface and preventing one end of the pipe (20) from being embedded in concrete,
Form the block (50) with foamed resin and insert one end of the pipe (20) to be piped into the slab deeply into this block (50) so that one surface of the block (50) is substantially flush with the slab surface. Conventionally, a method of fixing, pouring concrete, forming a slab, and then connecting to a pipe outside the slab has been adopted.

However, even for the method of construction using the block (50) as described above, it is difficult to remove the foamed resin block (50) from the slab after the slab is formed, and the block (50) is scraped out into small pieces, After that, it was hard to clean up. Further, when one end of the pipe (20) is pierced into the block (50), the pipe (20) is likely to meander or tilt, so that the work of piercing the pipe (20) to prevent this is very troublesome.
Also, in order to prevent the pipe (20) sticking due to such meandering or inclination of the pipe (20) from protruding outside the block (50), using a large block also affects the strength of the slab, There was a problem that the hollow formed by removing (50) had to be backfilled later.

Furthermore, in the case of the construction method using the block (50), the block
Since one end of the pipe (20) is deeply inserted into the (50), it takes time to cover the end of the pipe (20) with a cap or the like so that the foamed resin does not get stuck in the pipe, and such a block of foamed resin (50 ) Is produced by a worker on site using a heat insulating material or the like, so that there is a problem in that the size also varies.

(Problems to be Solved by the Invention) The present invention has been made in view of such circumstances, and it is possible to efficiently perform a piping work for connecting a pipe from inside a slab to a pipe outside a slab with a simple operation, In addition, it does not require a separate connecting tool when connecting to a pipe outside the slab, and can be applied when connecting pipes of different types or diameters inside and outside the slab. An object of the present invention is to provide a piping method and a pipe pulling tool that acts on the piping method.

(Means for Solving the Problem) According to the piping method of the present invention, as described in claim 1, “one end of a pipe to be piped in a slab is inserted into the tubular portion of the pipe drawer having the tubular portion. While fitting, then fix the pipe drawing tool to the formwork or skeletal rebar so that the upper surface is substantially flush with the slab upper surface, then place concrete and open the upper surface of the pipe drawing tool after forming the slab. Then, one end of the pipe to be piped to the outside of the slab is inserted from the upper opening of the pipe drawing tool, and further inserted into the tubular portion of the pipe drawing tool. "

Further, the pipe pulling tool according to the present invention has a structure in which “a tubular portion into which one end of each pipe is fitted and inserted into both ends,
And a main body having a closing portion which is inserted into one end of the tubular portion and is opened to insert one end of a pipe piped outside the slab after pouring concrete ”.

Further, the pipe drawing tool according to claim 3 includes “a fixing portion for fixing the main body and the tubular portion to the form or the skeletal rebar”.
The pipe drawer according to claim 4 is characterized in that "the tubular portion is configured as a separate body that is detachable from the main body", and the pipe drawer according to claim 5 is the pipe drawer. 7. The pipe drawing tool according to claim 6, characterized in that the closing portion of the tool is formed by a knockout knockout, and the "fixing portion of the tube drawing tool is installed on a skeletal rebar in the slab. The support member to be fixed is formed by a cylindrical body through which the support rod is fixed. "The pipe drawing tool according to claim 7, wherein the pipe drawing tools are attached to and detached from each other and are connected in parallel. It is characterized by that.

(Operation of the Invention) In the piping method according to the first aspect, since the pipe drawer is fixed to the formwork or the skeleton rebar so that the upper surface thereof is substantially flush with the upper surface of the slab, and concrete is poured, When the concrete is placed, the pipe pull-out tool does not protrude from the top surface of the slab and the placed concrete can be leveled quickly.

Also, after forming the slab, open the upper surface of the pipe drawing tool,
It is a method of inserting one end of the pipe to be piped outside the slab from the top opening of the pipe drawing tool, and then inserting it into the tubular part of the pipe drawing tool. It is not necessary to remove the slab from the inside of the slab after forming the slab, so that the pipe from the inside of the slab to the outside of the slab that connects the pipe from inside the slab to the outside of the slab can be efficiently drawn.

Furthermore, when connecting pipes outside the slab, it is done by inserting one end of the pipe to be piped outside the slab into the tubular part of the pipe drawing tool, so no separate connecting tool is required and the work is easy. become.

Further, when the tubular portion is horizontal, the pipe in the slab to be inserted can be piped without bending, for example, with respect to the pipe laid in the slab with a rigid resin pipe or steel pipe, It can also be applied to piping that connects flexible resin pipes from outside the slab. Also, by changing the diameter of both ends of the tubular part,
It can also be applied when connecting pipes with different diameters inside and outside the slab.

When using the pipe drawer according to any one of claims 2 to 7, it is sufficient to insert one end of the pipe into the tubular portion to fix the main body and the tubular portion to the pulling position, and concrete. After the casting, the closed portion is opened, one end of the pipe outside the slab is inserted, and the pipe is inserted into the tubular portion, so that the pipe inside the slab and the pipe outside the slab can be easily connected.

Further, in this pipe pulling tool, the main body accommodates the minimum portion required for inserting the pipe outside the slab and does not form an extra recess in the slab.

Further, in the case of the pipe drawing tool according to the third aspect, the main body and the tubular portion can be easily and surely fixed to the form or the skeletal rebar by the fixing portion.

In the case of the pipe drawer according to claim 4 in which the tubular portion and the main body are separate bodies, the tubular portion can be replaced with the main body as it is, and it is possible to easily handle pipes of various pipes having different diameters.

Further, in the case of the pipe withdrawal tool according to the fifth aspect, the withdrawal port of the pipe can be easily opened by punching with a hammer or the like in the closed portion formed by the knockout.

In the case of the pipe drawing tool according to claim 6, since it is fixed by a support rod which is installed and fixed to the skeletal rebar in the slab, it can be securely fixed, and compared with the case where it is fixed to the formwork.
Fixing members such as nails are not exposed outside the slab.

Further, in the case of the pipe drawing tool according to the seventh aspect, when a plurality of pipes are drawn from the slab at the same time, they can be easily connected in parallel by the connecting means.

(Example) Hereinafter, the present invention will be described in detail according to an example shown in the drawings. For convenience of explanation, the pipe drawing tool will be described first, and then the piping method will be described.

1 and 2 show an embodiment of the pipe drawing tool (10) according to the present invention.

This pipe drawing tool (10) is made entirely of synthetic resin, has a closing part (11) on the upper part of the main body (12), and the main body (12) has
As shown in FIG. 2, one end of a pipe (21) to be piped outside the slab is accommodated.

As shown in FIG. 3, the closing part (11) has a thin wall (11
The knockout formed in a) is formed and opened by punching. In addition to the knockout, the blocking portion (11) may be a surface that is thin overall, or a surface that is thick overall. The closing part (11) has such strength that it does not deform even if the cast concrete is covered with a fog.

The main body (12) can accommodate the pipe (21) outside the slab, and is elongated in the insertion direction of the pipe (21) to the extent that it does not hinder the insertion work of the pipe (21) outside the slab. The inner wall bottom of the main body (12) in the insertion direction of the pipe (21) is gently curved and inclined.

On one side wall of the body (12), a pipe (20) to be piped in the slab
One end of the pipe (21) to be piped outside the slab and one end of the pipe (21) are formed with cylindrical portions (13) respectively inserted into both ends. At the center of the inner surface of this cylindrical part (13), as shown in FIG.
(14) is formed so that the ends of the pipe (20) inside the slab and the pipe (21) outside the slab abut. Further, the tubular portion (13) has a locking claw having a triangular cross-section that projects inward from the inner surface of the tubular portion (13) and locks the pipe (20) inside the slab and the pipe (21) outside the slab. (15) are formed on both sides of the ledge (14).

The means for locking the pipes (20) (21) is not limited to the above-mentioned embodiment, and may be locked by the peripheral wall of the tubular portion (13) or screws screwed from the upper part of the main body (12). Of course, the pipes (20) and (21) and the tubular portion (13) may be adhered to each other with an adhesive, or any other known locking means may be used.

At both ends of the side wall of the main body (12), a tube (1
6) are provided respectively. This tube (16) is a fixing part for fixing the pipe pulling tool (10) in the slab, and as shown in FIG. 9, a support that is erected and fixed to the skeletal rebar (22) in the slab. The rod (23) is adapted to be inserted.
The support rod (23) inserted into the tube (16) has a height such that the position of the closing portion (11) of the pipe pulling tool (10) is almost the same as the upper surface of the slab formed by pouring concrete. Adjusted,
It is constructed so as to be erected and fixed to the skeletal reinforcing bars (22) arranged in the slab. The support rod (23) is fixed to the cylinder (16).
Not limited to the case. Further, the fixing part may be any part for fixing the main body (12) and the tubular part (13) to the form or the skeletal rebar (22).

Further, in this embodiment, a connecting portion (17) is formed on the side edge of the closing portion (11) by unevenness so as to be slidably fitted from above and below, and if necessary, a plurality of pipe drawing tools (10). Can be connected side by side. Such connecting means are
For example, a protrusion having a screw insertion hole is provided in the closing part (11),
The protruding pieces may be overlapped and screwed together, or they may be fitted and connected by corresponding unevenness,
It suffices as long as the pipe drawing tools (10) can be attached to and detached from each other and can be connected in parallel.

Further, the pipe drawing tool (10) can be connected to each other as shown in FIG. 1, and as shown in FIG.
Multiple tubes (20) may be housed within the body (12).

FIGS. 6 to 8 show another embodiment of the pipe drawing tool (10). In this embodiment, the tubular portion (13) is constructed as a separate body which is detachable from the main body (12). There is.

That is, the main body (12) is formed with one end side wall open, and the tubular portion (13) has an outer shape corresponding to the shape of the opening (12a) of the main body (12) and is inserted through the opening (12a). A peripheral wall portion (13a) is formed at one end. A convex portion (18) is formed on the peripheral wall portion (13a), while a concave portion (19) into which the convex portion (18) fits is formed on the inner wall of the main body (12). Therefore, as shown in FIG. 8, by inserting the peripheral wall portion (13a) of the separate cylindrical portion (13) through the opening (12a) of the main body (12), the convex portion (18) and the concave portion (19) are inserted. )
Are fitted together to attach the tubular portion (13) and the main body (12) together.

The tubular portion (13) and the main body (12) have a structure in which the concave portion (19) and the convex portion (18) are integrally fitted, as in the above-described embodiment, and the tubular portion (13 ) And the main body (12) may be integrally attached with each other by means of a screw or the like. Further, a structure may be adopted in which a male screw or a female screw is formed at one end of the tubular portion (13) and a female screw or a male screw is formed on the main body (12), and the both are screwed together and attached integrally.

Next, regarding the piping method, the pipe drawing tool (10) shown in FIG.
The case where is used will be described as an example.

First, as shown in FIG. 9, a pipe (20) to be piped on the formwork.
One end of the tube is inserted into the tubular portion (13) of the tube pullout tool (10). Next, the support rods (23) are inserted into the cylinders (16) on both side walls of the main body (12), and the inserted support rods (23) are supported by the nearby supporting bone rebars (22) arranged on the formwork. The rod (23) is erected, and is tied to the supporting bone rebar (22) with a wire or the like to fix the pipe pulling tool (10). At this time, the height is adjusted so that the position of the closed portion (11) of the pipe drawing tool (10) is substantially the same as the slab surface formed by pouring concrete. In the piping method according to the present invention, after fixing the pipe drawing tool (10) on the mold, one end of the pipe (20) piped on the mold is inserted into the tubular portion (13). You may

Then, as shown in FIG. 10, concrete is poured to form a slab (C). At this time, concrete may be covered on the upper surface of the pipe drawing tool (10) to form a thin film of concrete. However, this part has a different color from the concrete forming the surrounding slab (C), so the position of the pipe drawer (10) can be clearly discerned at a glance, and the covered concrete can be easily tapped on this part. It is possible to easily peel off and expose the blocking portion (11) which is the upper surface of the pipe pulling tool (10).

After curing the concrete, as shown in Fig. 11, the blockage (1
The knockout of 1) is punched out, and the insertion port for inserting one end of the pipe (21) outside the slab is opened. When the closed part (11) is formed with a uniform thickness, it is cut with a knife or a hand-held manual tool with a bit. Then, attach one end of the pipe (21) to be piped outside the slab to the main body.
It is inserted into the inside of the (12), and further inserted into one end of the tubular portion (13).
This completes the drawing of the pipe from the inside of the slab to the outside of the slab.

In addition, the piping method and the pipe drawing tool of the present invention are conduit tubes,
Alternatively, it can be applied to various pipes such as a flexible gas pipe, a water supply / drainage hot water pipe, and a flexible pipe for protecting these.

(Effects of the Invention) As described above, by the piping method and the pipe drawing tool according to the present invention, the pipe drawing tool is not projected from the slab surface during concrete pouring, and the poured concrete is leveled. It can be done quickly, and it does not require the work of peeling concrete or removing it from the slab after forming the slab like the foamed resin block, and the piping work to connect the pipes inside the slab to the pipes outside the slab can be performed easily and efficiently. You can

Also, when pouring concrete when forming a slab,
Even if the upper surface of the pipe puller is covered with concrete, the slab surface where the pipe puller is located has a thin concrete thickness and a different color, so the position of the pipe puller can be distinguished at a glance. By tapping lightly, you can remove the covered concrete on the upper surface of the pipe drawer to expose the upper surface of the pipe drawer.

Furthermore, when connecting pipes outside the slab, it is done by inserting one end of the pipe to be piped outside the slab into the tubular part of the pipe drawing tool, so no separate connecting tool is required and the work is easy. become.

Further, when the tubular portion is horizontal, the pipe in the slab to be inserted can be piped without bending, for example, with respect to the pipe laid in the slab with a rigid resin pipe or steel pipe, It can also be applied to piping that connects different types of pipes inside and outside the slab, such as connecting a flexible resin pipe from outside the slab.
Further, by making the diameters of both ends of the tubular portion different, it can be applied to a case where pipes having different diameters are connected inside and outside the slab.

Further, in the pipe pulling tool according to the present invention, the main body accommodates the portion necessary for pulling out the pipe, and does not form an extra recess in the slab. Therefore, a problem such as forming a recess in an unnecessary slab and affecting the strength of the slab does not occur.

Further, in the case of the pipe drawing tool according to the third aspect, the main body and the tubular portion can be easily and surely fixed to the form or the skeletal rebar by the fixing portion.

Further, in the case of the pipe drawing tool according to the fourth aspect, the tubular portion can be replaced with the main body as it is, and the pipes of various pipes having different diameters can be easily dealt with.

Furthermore, in the case of the pipe drawing tool according to the fifth aspect, the drawing port of the pipe can be easily opened by punching the closed portion with a hammer or the like.

In the case of the pipe drawing tool according to claim 6, since it is fixed by the support rod which is installed and fixed to the skeletal rebar in the slab, it can be securely fixed, and compared with the case where it is fixed to the formwork, it is outside the slab. The fixing members such as nails are not exposed.

Further, in the case of the pipe drawing tool according to the seventh aspect, when a plurality of pipes are drawn from the slab at the same time, the connecting means can be simply connected in a parallel state, which is convenient.

[Brief description of drawings]

FIGS. 1 and 2 show an embodiment of a pipe drawing tool according to the present invention. FIG. 1 is a perspective view thereof, FIG. 2 is a perspective view of a use state in which a closing portion is opened, and FIG. FIG. 4 is a partially enlarged cross-sectional view of the closed portion, FIG. 4 is a cross-sectional view showing a state in which a pipe inside the slab and a pipe outside the slab are inserted into the tubular portion, and FIG. 5 is another embodiment of the pipe drawing tool according to the present invention. 6 and 8 show another embodiment of the pipe drawing tool according to the present invention, FIG. 6 is its perspective view, and FIG. 7 is its perspective view. FIG. 8 is an exploded perspective view, FIG. 8 is a cross-sectional view thereof, and FIGS. 9 to 11 are cross-sectional views showing the piping method according to the present invention using the pipe drawing tool shown in FIG. FIG. 13 is each sectional view showing a conventional piping method, and FIG. 14 is a perspective view showing a conventional piping method using a foamed resin block. DESCRIPTION OF SYMBOLS 10 ... Pipe drawing tool, 11 ... Closure part, 12 ... Main body, 13 ... Cylindrical part, 16 ... Cylinder, 17 ... Connection part, 20 ... Pipe, 22 ... Spinner rebar, 23 ... Support rod.

Claims (7)

[Claims] 1. An end of a pipe to be piped in a slab is fitted into the tubular portion of a tubular drawer having a tubular portion, and
The pipe drawer is fixed to the formwork or skeletal rebar so that the upper surface is substantially flush with the slab upper surface, then concrete is placed, and after forming the slab, open the upper surface of the pipe drawer.
Next, one end of the pipe to be piped to the outside of the slab is inserted from the top opening of the pipe drawer, and further inserted into the tubular portion of the pipe drawer, and a pipe drawing method from inside the slab to outside the slab . 2. A tubular part into which one end of each pipe is inserted and fitted at both ends, and a pipe which communicates with one end of the tubular part and is opened for inserting one end of a pipe piped outside a slab after concrete placing A pipe pulling tool comprising: a main body having a closing portion; 3. The pipe drawing tool according to claim 2, further comprising a fixing portion for fixing the main body and the tubular portion to the form or the skeletal rebar. 4. The pipe drawing tool according to claim 2, wherein the tubular portion is formed as a separate body that is detachable from the main body. 5. The pipe drawing tool according to claim 2, wherein the closing portion is formed by a knockout capable of punching. 6. The pipe drawing tool according to claim 3, 4 or 5, wherein the fixing portion is formed by a cylinder through which a supporting rod which is erected on and fixed to a skeletal reinforcing bar in the slab is inserted. . 7. The pipe drawing tool according to claim 2, further comprising connecting means for connecting and disconnecting the pipe drawing tools so as to be connected in parallel with each other.