JPH11152867A - Sheet water-proof structure for flat roof with exhaust pipe installed thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet water-proof structure for a that roof with an exhaust pipe installed thereon to discharge high-temperature gas, capable of preventing the deterioration of a synthetic resin water-proof sheet due to heat. SOLUTION: An insulation area (p) is formed between a water-proof sheet 3 and an exhaust pipe P and an insulation space (q) is formed between a water- proof pipe 4 and the exhaust pipe P by vertically fixing the water-proof pipe 4 at the edge 3a of the water-proof sheet 3 contacting the insulation area (p) in the condition of surrounding the exhaust pipe P. An umbrella-shaped flashing skirt 6 is mounted on the exhaust pipe 4 in the condition of covering the upper opening of the water-proof pipe 4 while leaving an air circulation gap (r).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a flat roof on which an exhaust pipe is installed in a flat roof of a building using a synthetic resin waterproof sheet.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, for example, a waterproof sheet (13) is laid on a flat roof (11) on which an exhaust pipe (P) is protruded from the surface of a foundation (12) made of concrete or the like. As a waterproofing means, a waterproof sheet (13) is spread around the exhaust pipe (P), and a sealing member (15) that covers the end (13a) of the exhaust pipe (P) and is in close contact with the exhaust pipe (P) is tightened. Means for attaching with a band (t) or the like has been adopted.

However, when the exhaust pipe (P) exhausts high-temperature gas (g) for a long time like a chimney, the exhaust pipe (P) of a synthetic resin waterproof sheet (13) is heated. Deterioration progresses from the end (13a) close to the end, the life of the waterproof sheet (13) is shortened, and the waterproof sheet (13) is broken at an early stage.
Similarly, the sealing member (15) at the rising portion of the exhaust pipe (P) and the sealing agent (s) used for the end portion (15a) of the sealing member (s) also significantly deteriorate due to heat, causing cracks. There was a problem that caused.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and provides a synthetic resin even for a flat roof sheet waterproof structure provided with an exhaust pipe for exhausting high-temperature gas. It is an object of the present invention to provide a sheet waterproof structure of a flat roof provided with an exhaust pipe, in which a waterproof sheet made of steel is not deteriorated by heat.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a sheet waterproof structure for a flat roof provided with an exhaust pipe, wherein an insulating region is formed between the waterproof sheet and the exhaust pipe. An insulating space is formed between the waterproof pipe and the exhaust pipe by fixing a waterproof pipe surrounding the exhaust pipe upright to the edge of the waterproof sheet in contact with the insulating area in a watertight manner. An umbrella-shaped drainer skirt is attached to the pipe so as to cover the upper opening of the waterproof pipe leaving a gap for air circulation, and a sheet waterproof structure of a flat roof provided with an exhaust pipe is provided. And

In a preferred aspect of the present invention, a waterproof pipe used for a sheet waterproof structure of a flat roof on which the exhaust pipe is installed has a drainage rib formed on an outer periphery of an upper end of the waterproof pipe. It is a sheet waterproof structure for a flat roof.

As a material used for each member of the sheet waterproof structure of the flat roof according to the present invention, a soft vinyl chloride resin sheet is most commonly used as a waterproof sheet, but other sheet materials conventionally used include: For example, a synthetic rubber sheet or the like is also applicable. A hard vinyl chloride resin pipe is used as the waterproof pipe, but other heat-resistant vinyl chloride resin pipes are also suitable. Further, a metal plate is used for the drainage skirt, and for example, a stainless plate is suitable.

The waterproof sheet structure of the present invention can be applied to any of the mechanical waterproofing method and the contact waterproofing method.

[0009]

Embodiments of the present invention will be described below with reference to the drawings and examples. In addition, all drawings showed the flat roof to which sheet waterproofing was applied by the mechanical fixing method.

FIG. 1 is a sectional perspective view showing a sheet waterproof structure of a flat roof provided with an exhaust pipe of the present invention.
(P) is, for example, a chimney installed to protrude from the surface of a concrete base (2) of a flat roof (1) for discharging various exhaust gases generated inside a building,
An exhaust pipe for discharging a relatively high-temperature gas (g) to the outside. Around the periphery of the exhaust pipe, a waterproof sheet (3) is laid and fixed on a base (2) via a bonding piece (j) bonded and bonded. Have been.

In FIG. 1, between the waterproof sheet (3) and the exhaust pipe (P), an end portion (3a) of the waterproof sheet (3) is arranged apart from the exhaust pipe (P). As a result, the insulating region (p) is formed, and the exhaust pipe (P) is surrounded from the periphery at the edge (3a) of the waterproof sheet (3) in contact with the insulating region (p). In this state, the waterproof pipe (4) is arranged upright, and is fixed by attaching a sealing member (5).
An insulating space (q) is formed between the waterproof pipe (4) and the exhaust pipe (P). In this case, the sealing agent (S1) (S1
2) is filled.

In the above, the width (b) of the insulating space (q)
Is a value obtained by subtracting the thickness of the waterproof pipe (4) from the width (a) of the insulating region (p), and the value varies depending on the size of the exhaust pipe (P), but is approximately 2 to 5 cm.
It is set to about the width. The waterproof pipe (4)
Is desirably 50 mm or more higher than the assumed height of the water pool.

Next, an umbrella-shaped drainage skirt (6) is provided on the exhaust pipe (P) at a position above the waterproof pipe (4) so that the upper opening of the waterproof pipe (4) is opened. The air flow gap (r) is left behind so as to be concealed, and the upper part is attached by tightening the upper part with a fastener (7). The air flow gap (r) between the inner surface of the drainer skirt (6) and the outer periphery of the upper end of the waterproof pipe (4).
Plays a role of always lowering the rise in temperature in the waterproof pipe (4) by the natural circulation of air through the gap (r). At least about 5 mm is required, but if it is too large, As rainwater invades,
It is desirable that the gap is at most about 10 mm. The adjustment of the air flow gap (r) is performed by adjusting the mounting height of the drainage skirt (6) with respect to the waterproof pipe (4).

A heat insulating material (not shown) such as asbestos is interposed between the exhaust pipe (P) and a mounting portion (6a) of the drainer skirt (6), and the exhaust pipe (P) is ) Is desirably prevented from transferring heat to the drainer skirt (6).

As described above, in the waterproof sheet structure of the present invention, the exhaust pipe (P) passes through the high temperature gas (g).
Heat is not directly transmitted to the waterproof sheet (3) due to the formation of the insulating region (p),
Further, since the waterproof pipe (4) is arranged so as to surround the exhaust pipe (P) to form the insulating space (q), the heat transmission is almost shut off. Since the upper opening of the waterproof pipe (4) is covered and covered by the drainage skirt (6) while leaving the air circulation gap (r), it is possible to prevent rainwater from entering. The natural convection of the air acts to maintain the temperature of the air in the pipe for waterproofing (4) at room temperature.

FIG. 2 shows a preferred embodiment of the present invention, and particularly shows a modification of the waterproof pipe (4).
That is, a drainage rib (4a) is formed on the outer periphery of the upper end of the waterproof pipe (4), and this acts to more effectively prevent rainwater from entering. In this case, the air circulation gap (r ') is provided with a drainer skirt (6).
And between the draining rib (4a) on the outer periphery of the upper end of the waterproof pipe (4).

FIG. 3 shows another preferred embodiment of the present invention. In the outer peripheral portion of the exhaust pipe (P), at least the outer peripheral portion corresponding to the insulating space (q) has a heat insulating material such as asbestos. Material (7) is covered. In this case, the transfer of heat from the exhaust pipe (P) can be more effectively blocked.

First, an embodiment of the present invention is applied to a flat roof of a concrete building in which a soft vinyl chloride resin sheet is laid as a waterproof sheet by a close contact method, and has an outer diameter of 20 cm for discharging hot gas. The structure shown in FIG. 4 was adopted for a waterproof structure of a portion where the chimney (P ′) was installed upright from the base portion.

First, as shown in FIG. 4, a ring-shaped insulating region (p) having a width (a) of 5 cm is formed around the chimney (P '), and the insulating region (p) is left outside the insulating region (p). Laid a 1.5 mm thick waterproof sheet (3).

Next, a waterproof pipe (4) having an outer diameter of 3
A pipe made of a hard vinyl chloride resin having a thickness of 0 cm, a thickness of 10 mm, and a height of 30 cm is prepared, and the pipe is arranged upright in the insulating area (p) so that an insulating space (q) is formed.
Further, the waterproof pipe (4) is covered with a hat-shaped sealing member (5) made of a soft vinyl chloride resin and having a cylindrical portion having an inner diameter of 30 cm and a height of 29 cm and having a flanged edge (5a) at the lower end. And the flange-shaped edge (5a) was bonded and fixed to the waterproof sheet (3). Seal member (5)
Sealing agents (S1) and (S2) were applied to the upper end of the and the periphery of the flanged edge (5a), respectively.

Next, as a drainer skirt (6),
The mounting part (6) made of a stainless steel plate with a thickness of 0.3 mm
a) inner diameter is 20 cm, hem (6b) is 45 cm in diameter,
Prepare an umbrella shaped body with a spread angle (α) of about 70 degrees,
This is inserted into the chimney (P '), and the air flow gap (r) is 5 mm.
Then, it was attached using a fastening fitting (t) via asbestos, and the waterproofing was completed.

According to the embodiment, the member used in the sheet waterproof structure of the flat roof provided with the chimney is simple and inexpensive, and its assembly is extremely easy.

Further, the obtained sheet waterproof structure has high heat insulation performance because heat from the chimney is not transmitted to the waterproof sheet, and has high waterproof performance without intrusion of rainwater or the like into the base. .

[0024]

As described above, according to the present invention, in a sheet waterproof structure of a flat roof provided with an exhaust pipe, an insulating region is formed between the waterproof sheet and the exhaust pipe and is in contact with the insulating region. An insulating space is formed between the waterproof pipe and the exhaust pipe by fixing the waterproof pipe surrounding the exhaust pipe upright at the edge of the waterproof sheet in a watertight manner, and then the exhaust pipe has an umbrella shape. The drainage skirt adopts a waterproof structure that is mounted so as to cover the upper opening of the waterproof pipe leaving a gap for air circulation, so that sheet waterproofing is performed around the exhaust pipe that discharges high-temperature gas. Also when applied, the waterproof sheet does not undergo thermal deterioration, and therefore, there is an effect that the durability of the waterproof sheet in the relevant portion is maintained for a long period of time.

Further, according to the present invention, the formation of the insulating region can prevent rainwater or the like from entering, even though the base surface is exposed to the outside air, and keep the temperature environment around the exhaust pipe at room temperature. There is an advantage of exhibiting a synergistic effect that it can be performed.

Furthermore, a drainage rib can be formed on the outer periphery of the upper end of the waterproof pipe, and the waterproof effect can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a partially sectional perspective view showing a waterproof structure for a sheet of a flat roof on which an exhaust pipe of the present invention is installed.

FIG. 2 is a partially sectional perspective view showing a preferred embodiment of a waterproof pipe in the waterproof sheet structure of the present invention.

FIG. 3 is a partially sectional perspective view showing another preferred embodiment of the waterproof sheet structure of the present invention.

FIG. 4 is a partial sectional perspective view for explaining an embodiment of the present invention.

FIG. 5 is a partial cross-sectional view for explaining a sheet waterproof structure of a flat roof provided with a conventional exhaust pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flat roof 2 ... Base 3 ... Waterproof sheet 3a ... Edge 4 ... Waterproof pipe 5 ... Sealing member 5a ... Flanged edge 6 ... Drain skirt 6a ... Attachment part 6b ... Bottom part 7 ... Heat insulating material P, P ' ... exhaust pipe p ... insulating area q ... insulating space r, r '... gap for air flow t ... fastening metal fittings S1, S2 ... sealing agent

Claims (2)

[Claims] 1. A sheet waterproof structure for a flat roof provided with an exhaust pipe, wherein an insulating area is formed between the waterproof sheet and the exhaust pipe, and the edge of the waterproof sheet in contact with the insulating area is provided at an edge of the waterproof sheet. An insulating space is formed between the waterproof pipe and the exhaust pipe by fixing the waterproof pipe surrounding the exhaust pipe upright in a watertight manner, and an umbrella-shaped drainage skirt is provided on the exhaust pipe. A seat roof waterproof structure provided with an exhaust pipe, wherein the upper opening is mounted so as to cover the upper opening with a gap for air circulation. 2. The sheet waterproof structure for a flat roof provided with an exhaust pipe according to claim 1, wherein the waterproof pipe has a drainage rib formed on an outer periphery of an upper end of the waterproof pipe.