JPH0437140Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a drain pipe buried in a drain hole provided on the rooftop floor of a building or other structure, and in particular, the invention relates to a drain pipe that is buried in a drain hole provided on the roof surface of a building or other structure. Regarding drain pipes that can be used for

BACKGROUND OF THE INVENTION Drain holes are usually provided on the roof surfaces of buildings and other structures for drainage of rainwater and the like.
As shown in Figure 9, concrete floor base 3
1, a drain hole 37 is formed in the floor surface on which a waterproof layer 35 is provided via a breathable sheet 33, and a drain pipe 39 is buried in this drain hole 37. As the drain pipe 39, a pipe made of a water-impermeable material such as PVC is used. The waterproof layer 35 is provided in a watertight manner with the drain pipe 39. If the concrete floor base 31 is directly exposed in the drain part, water will seep into the concrete during drainage, so the drain part has such a watertight structure.

However, if the drain section is simply constructed in this way, there is no way for the moisture in the concrete floor base 31 to escape, and this moisture moves upwards to the waterproof layer 31.
The pressure builds up at the interface with the waterproof layer 35.
This causes blistering and peeling of the waterproof layer 35.

Therefore, concrete floor base 31 and waterproof layer 35
An air permeable sheet 33 is provided between the air permeable sheet 3 and a vent cylinder (not shown) that communicates with the air permeable sheet 33 is provided on the floor surface to remove moisture in the concrete from the air permeable sheet 3.
3, the water is guided to the decylinder and the moisture etc. are discharged to the outside.

However, since a separate venting cylinder is provided, it not only takes time and effort to increase construction costs, but also impairs the flatness of the floor surface, resulting in the problem that the floor surface cannot be used effectively.

Purpose of the invention This invention aims to
It is an object of the present invention to provide a drain pipe that can simultaneously perform the functions of deaerating a concrete layer and functioning as a normal drain.

Structure of the invention The drain pipe of the invention is a drain pipe that is buried in a drain hole provided in a floor surface, etc., and the outer circumferential surface of the drain pipe is covered with moisture etc. in concrete in the length direction of the pipe. A feature is that a protrusion or a communication hole is formed so that a continuous passage for degassing is formed.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of the drain pipe 11 of the present invention, in which a communicating brim-like body 15a (protrusion) made of open foam is provided at the upper end of the cylindrical body 13. There is. The open pores of this open foam form a continuous passageway. A non-communicating portion 13a is provided on the inner side of the upper end surface of the drain pipe 11 in the thickness direction over the entire circumferential direction.

FIG. 2 is a perspective view showing another embodiment of the present invention, in which a flange-like body having a through-hole 21 is used as the brim-like body 15b, and this through-hole 21 becomes a continuous water passage. A non-communicating portion 13a is provided on the inner side of the upper end surface of the drain pipe 11 in the thickness direction over the entire circumferential direction.

FIGS. 3 and 4 each show other embodiments. In FIG. 3, a plurality of spacers 17a are formed discontinuously in the circumferential direction on the outer peripheral surface of the cylindrical body 13 of the drain pipe 11.
The gap between 7a becomes a continuous water passage. Spacer 17
a is a rectangular body. FIG. 4 is the same as FIG. 3 except that a bowl-shaped spacer 17b (a part of a spherical body) is formed.

FIG. 5 shows an embodiment of the present invention, in which the cylindrical body 13
The spacer 17c extends from the upper end surface to the entire lower end surface.
are spaced apart.

FIG. 6 shows another embodiment of the present invention, in which a through hole 22 is bored in the side wall of the drain pipe 11 along its length. Drain pipe 11
A non-communicating portion (non-perforated portion) 13a is provided on the inner side of the upper end surface in the thickness direction over the entire circumferential direction.

FIG. 7 shows still another embodiment, in which the flanged body 1 has a gap 25 between each divided piece 23, 23...
5c and spacer 17d are both formed.

Next, a method for constructing a drain part during construction of a waterproof layer using the drain pipe of the present invention will be described with reference to FIG. In this construction example,
The drain pipe shown in Figure 7 is used.

First, the drain pipe 11 shown in FIG. 7 is inserted into the drain hole 37. At this time, the flanged body 15
c defines the fixed height position of the drain pipe 11, making it easy to fix it. Further, since the spacer 17d restricts movement of the drain hole 37 in the diametrical direction, alignment is easy.

Next, a concrete floor base 31 and a breathable sheet 33 are laid, and a waterproof layer 35 is further formed.
At this time, the waterproof layer 35 is applied to the non-communicating upper end surface 13 of the drain pipe 11 so as not to close the gap 25 in each divided piece 23, 23 of the brim-like body 15c.
Glue to a. More generally, the continuous passageway of the present invention is secured so as not to be occluded. The breathable sheet 33 is provided so as to communicate with the gap 25 (ie, the continuous passage).

Moisture in the concrete floor base 31 is removed by the flanged body 1.
5c, the gap between the cylindrical body 13 of the drain pipe 11 and the concrete floor base 31, and the gap between the spacers 17d, and escape to the outside.
The concrete floor base 31 can be deaerated using the drain pipe 11.

Further, since the upper end surface 13a of the cylindrical main body 13 of the drain pipe 11 and the waterproof layer 35 are sealed, the waterproof effect is not impaired in the drain portion. Drain water is drained from the drain hole 37 via a drain pipe 41.

Note that as the breathable sheet, an appropriate one such as an open-pore foamed sheet, a nonwoven fabric, or a knitted sheet is used.

As the waterproof layer, a synthetic resin sheet such as vinyl chloride, a synthetic resin coating such as polyurethane, asphalt, etc. are used.

Furthermore, when the waterproof layer 35 becomes fatigued over time, repair work is performed on the waterproof layer. In this construction, a holding concrete layer is placed on top of the waterproof layer 35, a repaired waterproof layer is similarly formed on top of the waterproof layer with a breathable sheet interposed therebetween, and a drain pipe is added to cover the thickness of these layers. The pipe of the present invention can be similarly used as the drain pipe.

Effects of the invention According to the invention, by providing a protrusion or a communicating hole on the outer peripheral surface of the drain pipe so as to form a continuous passage, concrete can be deaerated at the same time as drainage by the drain. . Therefore, when waterproofing the floor surface or repairing the waterproof layer, the moisture contained in the concrete can cause
This prevents problems such as blisters from occurring in the waterproof layer. In addition, since deaeration is performed at the same time as draining, there is no need to install a separate degassing cylinder, which is advantageous in terms of cost, and the floor surface can be made flat to realize effective use of the floor surface. .

[Brief explanation of the drawing]

1, 2, 3, 4, 5, 6 and 7 are perspective views showing embodiments of the present invention. FIG. 8 is an explanatory diagram showing an example of construction of a waterproof layer using the drain pipe of the present invention. 9th
The figure is an explanatory diagram showing an example of construction of a conventional waterproof layer. 11... Drain pipe, 13... Cylindrical body, 13a... Upper end surface, 15a, 15b, 15c
... Flange-shaped body, 17a, 17b, 17c, 17d...
...Spacer, 31...Concrete floor base, 33
...Breathable sheet, 35...Waterproof layer, 37...Drain hole.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a drain pipe buried in a drain hole provided in a floor surface, etc., the outer circumferential surface of the drain pipe is degassed from moisture, etc. in concrete in the length direction of the pipe. A drain pipe characterized in that a protrusion or a communication hole is formed so as to form a continuous passage for carrying out this process. 2. The drain pipe according to claim 1, wherein the protruding portion is a communicating collar-like body provided at the upper end of the drain pipe. 3. The drain pipe according to claim 1, wherein the protrusion is a spacer-like protrusion provided on the outer peripheral surface between both ends of the drain pipe. 4. As the protrusion, a communicating collar-like body is provided at the upper end of the drain pipe, and a spacer-like protrusion is provided on the outer peripheral surface between both ends of the drain pipe. The drain pipe described in item 1.