JP2006183436A - Waterproofing/heat insulating structure of surface of flat roof skeleton and exhaust pipe with check valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulator laminated structure which efficiently exhausts, to the outer air, the gas like water vapor or an organic volatile matter content sealed inside a waterproofing sheet and the heat insulator laminated structure provided on a surface of a flat roof skeleton, and hardly exfoliates over a long period of time. <P>SOLUTION: A plurality of heat insulating layers being synthetic resin foam plates 1 are arranged on the surface of the flat roof skeleton leaving a space 2 so that they may not come into contact with one another. The water vapor generated from the concrete skeleton, and the gas like the organic volatile matter content generated from an adhesive agent for lamination of the heat insulating layers and the waterproofing sheet 3 are gathered in the space 2. An exhaust pipe 10 with a check valve is boringly arranged and the pressure in the space 2 is lowered so that the waterproof performance by expansion and contraction of the gas, and the durability of the heat insulating laminated structure may be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a waterproof / heat-insulating layer structure and an exhaust pipe with a backflow prevention valve capable of quickly exhausting gas such as water vapor and organic volatile matter inside a structure provided mainly on a flat roof frame surface such as a concrete building. .

  Conventionally, waterproofing on the flat roof surface of a concrete building has been spread with an asphalt roofing sheet using a liquid obtained by heating and dissolving asphalt solids as an adhesive. In this construction method, since fire is used, problems such as hot air, bad odor, irritating gas, smoke damage and the like which cause trouble for local residents as well as workers are caused at construction sites, and durability thereof is insufficient.

Recently, the necessity of heat insulation and heat insulation of buildings has been well known due to global warming and energy saving problems, and a laminated structure with waterproof and heat insulation functions in place of the asphalt roofing sheet method for the main purpose of waterproofing Is spreading.
For waterproofing and thermal insulation structures for buildings and large buildings on flat roofs, if an additional thermal insulation structure is installed on the existing flat roof with waterproof asphalt roofing sheet layer, it will be repaired and flattened as necessary. After forming the adjustment, a waterproof sheet layer is provided on the heat insulating layer and the upper surface thereof. In addition, when a waterproof and heat insulating structure layer is provided in a new building, a structure in which a heat insulating layer is applied to the entire surface with an adhesive or the like and then a waterproof sheet layer is laminated on the upper surface becomes the mainstream. ing.

  Also, if synthetic resin foam such as expanded polystyrene or expanded polyvinyl chloride is used as the heat insulating material on the surface of the building, such as the roof or outer wall, that comes into contact with the outside air, problems such as condensation may occur. Are known. In general, in a structure in which a waterproof layer or heat insulation layer is laminated on the reinforced concrete that is the outermost surface of the building, water vapor inside the building penetrates into the concrete and is blocked by the waterproof layer or heat insulation layer, losing the escape place and laminating There was a problem of being sealed inside the interface and the waterproof / heat insulating layer structure.

In order to eliminate such problems, in order to release water vapor in the case where a roof material (having a waterproof function) is provided in contact with a heat insulating material surface laid on a roof base material, in Patent Document 1, from the concrete surface By attaching hardware that penetrates the heat insulating material and attaching the roof base material and roofing material to the tip, it is possible to secure a sufficient space for mounting the heat insulating material and a space for venting the water vapor that has permeated from inside the room. It is described that it did.
JP 2000-336789 A

The above-mentioned laminated structure of the waterproof sheet and the heat insulating layer sufficiently satisfies the demand for energy saving by improving the heat insulating function of the building. However, the structure in which the waterproof sheet is laminated directly on the upper surface of the heat insulating layer is waterproof. There was a problem that water vapor that had permeated through could not be released because it was sealed with a sheet.
Furthermore, the laminated structure of the heat insulation layer and the waterproof sheet laid on the flat roof frame is directly subject to large temperature changes in the outside air, and is further exposed to wind, rain, and snow, and is prone to deterioration and peeling from the roof frame surface. I had it.

As a result of investigating the problems of the conventional laminated structure,
(1) Newly constructed reinforced concrete structures contain a large amount of moisture. When a waterproof and heat insulating laminated structure is provided on this surface, a large amount of water vapor is contained and the inside of the laminated structure expands and contracts. Repeatedly, facilitating the peeling of the structure laminated on the surface of the flat roof housing,
(2) The volatile content of the organic adhesive used to form the laminated structure is also contained inside, and it repeats expansion and contraction in the same way as water vapor, increasing the internal pressure. Promoting,
(3) The conventional heat insulating layer structure is based on the idea of increasing the heat insulating effect by laying the heat insulating layer on the entire surface of the flat roof without any gaps. I was able to find out that I had lost the escape.

Therefore, in the present invention, a waterproof / heat-insulating structure that can efficiently exhaust gas such as water vapor and organic volatile matter contained in the laminated structure to the outside air, and does not easily peel off the laminated structure over a long period of time. The purpose is to provide.
Furthermore, another object of the present invention is to provide a waterproof and heat insulating structure by modifying and repairing a flat roof on which an asphalt-based waterproof sheet is formed, or to provide a waterproof and heat insulating structure on a flat roof in a new building, etc. Is to provide a practical waterproof and heat insulating structure that can be easily constructed.

  The waterproof / heat-insulating structure on the surface of the flat roof frame according to claim 1 is a structure laminated on the surface of the flat roof frame, and a plurality of layers laminated on the roof surface with a gap of a predetermined width so that the side surfaces do not contact each other. A plate-like body, a waterproof sheet laminated so as to cover the surface of the plurality of plate-like bodies and the gap, and a hole formed in the gap to exhaust gas such as water vapor and organic volatile matter under the waterproof sheet. And a plurality of exhaust pipes with check valves.

  The exhaust pipe with a backflow prevention valve according to claim 2 exhausts gas such as water vapor and organic volatile matter generated inside a waterproof and heat insulating structure composed of a plate-like body and a waterproof sheet, which is laminated on the surface of the flat roof frame. And an upper body having a canopy and an exhaust main pipe, a pipe with a built-in backflow prevention valve that is the gas flow passage, a plate-like bag and a waterproof sheet disposed in contact with the upper part of the waterproof sheet A lower body having an inflow main pipe for taking in the gas extending into the lower part of the gas pipe, and an exhaust pipe is formed by screwing. The upper body is covered with a canopy covering the upper part and a trunk part of the exhaust main pipe. A drilled lateral hole exhaust port, and a threaded portion formed in the opening of the exhaust main pipe, the lower body is a threaded portion formed in the opening of the backflow prevention valve built-in pipe, A backflow prevention valve structure provided inside the flow prevention valve built-in pipe, and the inflow Characterized in that it and a tip inlet for taking in air of water vapor and organic volatiles like generated inside the structure to the tube tip.

The waterproof / heat insulating structure of the invention of claim 1 is arranged and laminated with a plurality of plate-like bodies on the surface of the flat roof body so as not to contact each other, so water vapor generated from the roof body, Gases such as organic volatile matter generated from the adhesive used when laminating the heat insulating layer and the waterproof sheet can be collected in the gaps between the plate-like bodies.
Further, the gas can be exhausted to the outside air by the exhaust pipe with a backflow prevention valve arranged at a predetermined interval on the waterproof sheet surface, and the gap internal pressure can be lowered.
Further, the gap provided between the plate-like bodies as the heat insulating layer has an effect of absorbing and relaxing the thermal deformation of the heat insulating layer, and can also reduce the peeling due to the heat deformation stress of the heat insulating layer.

Since the exhaust pipe with a backflow prevention valve according to claim 2 has a tubular tip inlet that serves as an inlet for gas such as water vapor or organic volatile matter, it can be easily drilled into the gap through the waterproof sheet. I can do it.
In addition, by providing a horizontal hole inlet in the tube body near the opening of the tip inlet, not only the tube tip opening but also gas such as water vapor and organic volatile matter can be taken in efficiently.

Furthermore, since the backflow prevention valve is provided in the longitudinal intermediate portion of the exhaust pipe with the backflow prevention valve, it is possible to prevent gas such as water vapor and organic volatile matter from re-entering into the gap under the waterproof sheet. And since the horizontal hole exhaust port for exhaust is formed in the horizontal direction near the upper end of the tube body of the backflow prevention valve, it is possible to prevent rain and snow from entering.
Furthermore, the backflow prevention valve structure (lower body) of the exhaust pipe with a backflow prevention valve and the tube body (upper body) provided with the exhaust port are screwed so that they can be easily separated. The internal valve body can be easily replaced and the internal cleaning can be easily performed.

Hereinafter, embodiments of a waterproof and heat insulating structure according to the present invention will be described in detail with reference to the drawings.
(Embodiment)
FIG. 1A shows an exhaust pipe 10 with a backflow prevention valve disposed in a flat roof frame on a building roof so as to communicate with gaps 2 between a plurality of plate-like synthetic resin foams (plate-like bodies) 1 below a waterproof sheet. 1 is a perspective view of a waterproof and heat insulating structure according to an embodiment in which a hole is formed.
FIG.1 (b) shows the drilling state of the exhaust pipe 10 with a backflow prevention valve which comprises the waterproofing and heat insulation structure of embodiment, and is AA sectional drawing in Fig.1 (a).
In FIG. 1, the waterproof and heat insulation structure of this Embodiment has shown the state applied on the surface of the existing asphalt roofing sheet layer 20a currently given to the flat roof frame 20 of a reinforced concrete structure.
A plurality of rectangular plate-shaped synthetic resin foams 1 shown in FIG. 1 (a) are laminated with an organic adhesive on the surface of the asphalt roofing sheet layer 20a while maintaining a gap 2 of about 7 mm so as not to contact each other. ing.

As shown in FIG. 1B, the waterproof sheet 3 is laminated via an organic adhesive so as to cover the entire surface of the plate-shaped synthetic resin foam 1 and the gap 2 and penetrates the waterproof sheet 3. The exhaust pipe 10 with a backflow prevention valve is drilled on the surface of the waterproof sheet 3 with the front end inlet 11a facing downward.
In the embodiment, an example in which a waterproof and heat insulating layer structure is provided on the surface of the existing asphalt roofing sheet layer 20a is shown. Forms of waterproof and heat insulating structures can also be provided.

In general, when a waterproof and heat insulating structure is provided on the surface of an existing asphalt roofing sheet layer, a large amount of asphalt pitch or bonding agent is filled in order to adjust and repair the old asphalt roofing sheet layer. It is necessary to apply.
Even in such a case, the waterproof and heat insulating structure according to the embodiment has a structure in which the volatile matter can always be exhausted by the exhaust pipe with the backflow prevention valve even after the stacking. There is an advantage that it is not necessary to take a long curing period for dissipation.

The plate-like body used in the present invention includes a hard urethane resin foam, a phenol resin foam, a polyisocyanate resin foam, an epoxy resin foam, a styrene resin foam, an olefin resin foam, and a styrene modified material. Examples thereof include an olefin resin foam, or a foam resin obtained by appropriately mixing these. These plate-like bodies are roughly 10 to 100 mm in thickness, 800 to 1000 mm in width and 1800 to 2000 mm in length as one unit, and each plate-like body has a gap of 5 to 15 mm across the construction housing. Lay down.
Examples of the material of the waterproof sheet 3 include various synthetic resins such as rubber or polyvinyl chloride.

  A tip inflow port 11a of the exhaust pipe 10 with the backflow prevention valve is inserted into the inside by perforating a waterproof sheet 3 covering the gap 2 of the plate-like synthetic resin foam 1. A horizontal hole inlet 11b is provided in the vicinity of the distal end of the inserted inflow main pipe 11, and a gas such as water vapor and organic volatile matter staying in the gap 2 flows in by an internal pressure. The inflowing gas passes through the backflow prevention valve built-in pipe 12 and is discharged to the outside air from the side hole exhaust port 13 a provided in the exhaust main pipe 13.

FIG. 2 shows an example in which square plate-shaped synthetic resin foams 1 are arranged in a grid pattern, in which a plurality of plate-shaped synthetic resin foams 1 laid on a flat roof frame surface are stacked while maintaining a gap 2; The perforation arrangement distribution of the exhaust pipe 10 with the backflow prevention valve is illustrated.
In order to exhaust the gas staying in the gap 2 of the plate-shaped synthetic resin foam 1 uniformly over the entire laying surface, it is desirable to lay the plate-shaped synthetic resin foam having the same shape in an orderly manner. The larger the number of the exhaust pipes 10 with the backflow prevention valve that are perforated at intervals on the surface of the waterproof sheet 3, the more effective, but the exhaust effect can be obtained with about one per 1 to 3 square meters.

FIG. 3 is a longitudinal sectional perspective view showing the structure of the exhaust pipe 10 with a backflow prevention valve used in the structure of the present invention.
As shown in FIG. 3, the exhaust pipe 10 with a backflow prevention valve is composed of an upper body A and a lower body B that can be screwed together. The upper body A is mainly composed of the exhaust main pipe 13 and the canopy 40, and the lower body B is mainly composed of the backflow prevention valve built-in pipe 12, the plate-like saddle 30, and the inflow main pipe 11.
The tip inflow port 11a of the inflow main pipe 11 can be easily penetrated through the waterproof sheet 3 by being inclined to form a cut end.
Further, a horizontal hole inlet 11 b that communicates with the lower body hollow portion 11 c in the inflow main pipe 11 is provided so that the gas staying in the gap 2 can easily flow into the inflow main pipe 11. In addition, you may provide this horizontal hole inflow port 11b by changing an angle and a position.

A plate-like rod 30 is provided at an intermediate position between the side hole inlet 11b and the backflow prevention valve built-in pipe 12. The plate-shaped rod 30 has a role of stably fixing the main body of the exhaust pipe 10 with the backflow prevention valve to the waterproof sheet 3 in a vertical posture and preventing rainwater and the like from easily permeating from the portion perforated in the waterproof sheet 3. The surface shape and size of the plate-like ridge 30 are not limited to a circle as long as they have a certain spread on the waterproof sheet 3.
Inside the tube 12 with a built-in backflow prevention valve, there is a backflow prevention valve structure 12d, and a coin-shaped valve body 12a is placed so as to close the lower body hollow portion 11c.
The gas flowing in from the tip inflow port 11a and the side hole inflow port 11b floats the valve body 12a upward against the gravity of the valve body 12a by the atmospheric pressure. As a material of the valve body 12a, a weather-resistant soft synthetic resin material is preferably used, but stainless steel, non-ferrous alloys, and the like can also be used. The diameter of the valve body 12a is about 2 mm smaller than the inner diameter of the backflow prevention valve built-in pipe 12, and a thickness of about 0.8 to 1.2 mm is suitable for reliable operation even when the internal pressure is increased.

The lower body threaded portion 12b is provided in the opening 12c of the backflow prevention valve built-in tube 12, and the upper body threaded portion 13b of the exhaust main pipe 13 is screwed to the lower body threaded portion 12b.
The exhaust main pipe 13 is provided with a lateral hole exhaust port 13a communicating with the upper hollow body 13c. Further, a canopy 40 is provided at the uppermost end of the exhaust main pipe 13 so that rain, snow and the like do not directly enter from the side hole exhaust port 13a.

FIG. 4 is a vertical cross-sectional perspective view showing an example in which the surface shape of the plate cage 30 is a rectangular shape, and a canopy skirt 40a is provided on the outer periphery of the canopy 40 so that rain and snow do not directly enter the lateral hole exhaust port 13a. is there. Further, FIG. 4 shows an example in which the valve body 12a inside the backflow prevention valve structure 12 is formed in a spherical shape instead of a coin shape, and even if the valve body 12a is formed in a spherical shape, it functions as a backflow prevention valve.
Thus, if it is a backflow prevention valve structure which has a mechanism which prevents a backflow by the dead weight of a valve body, the components and other structures can be selected suitably.

  The waterproof and heat-insulating structure of the present invention has a plurality of heat-insulating layers, which are plate-like synthetic resin foams, placed on the surface of a flat roof housing so as not to contact each other, water vapor generated from the concrete housing, Gases such as organic volatiles generated from the adhesive for laminating waterproof sheets can be collected in the gap. And it can be exhausted to the outside air by an exhaust pipe with a backflow prevention valve arranged at a specific interval on the waterproof sheet surface, the internal pressure of the gap can be lowered, the deformation of the waterproof sheet and the heat insulation layer due to the expansion and contraction of the gas can be eased, and peeling Therefore, the durability of the waterproof and heat-insulated laminated structure can be improved.

(A) is a perspective view of the waterproofing and heat insulation structure of embodiment, (b) is AA sectional drawing in (a). It is a perspective view which shows the example which has arrange | positioned the square plate-shaped synthetic resin foam to the grid. It is a longitudinal cross-sectional perspective view of the exhaust pipe with a backflow prevention valve of this invention. It is a longitudinal cross-sectional perspective view which shows another aspect of an exhaust pipe with a backflow prevention valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Plate-like synthetic resin foam 2 ... Gap 3 ... Waterproof sheet 10 ... Exhaust pipe 11 with a backflow prevention valve ... Inflow main pipe 11a ... Tip inflow port 11b ... Side hole Inlet 11c ... Lower body hollow part 12 ... Backflow prevention valve built-in pipe 12a ... Valve body 12b ... Lower body threaded part 12c ... Opening part 12d ... Backflow prevention valve structure 13. .. Exhaust main pipe 13a ... Horizontal hole exhaust port 13b ... Upper body threaded part 13c ... Upper body hollow part 20 ... Flat roof frame 20a ... Asphalt roofing sheet layer 30 ... Board鍔 40 ... Canopy 40a ... Canopy Skirt

Claims (2)

A structure that is laminated on the surface of a flat roof frame, a plurality of plate-like bodies laminated on the roof surface with a gap having a predetermined width so that the side surfaces do not contact each other, and the plurality of plate-like bodies and the gap A waterproof sheet laminated so as to cover the surface, and a plurality of exhaust pipes with backflow prevention valves formed in the gap for exhausting gas such as water vapor and organic volatile matter under the waterproof sheet. Features a waterproof and heat insulating structure on the surface of a flat roof housing. An exhaust pipe used for exhausting gas such as water vapor and organic volatile matter generated inside a waterproof and heat insulation structure composed of a plate-like body and a waterproof sheet, which is laminated on the surface of a flat roof frame, An upper body having an exhaust main pipe, a tube with a built-in backflow prevention valve that is a flow path for the gas, a plate-like ridge disposed in contact with the upper part of the waterproof sheet, and a lower part of the waterproof sheet for taking in the gas The lower body having the inflow main pipe is screwed to form an exhaust pipe,
The upper body includes a canopy covering the upper part, a horizontal hole exhaust port formed in the trunk portion of the exhaust main pipe, and a threaded portion formed in the opening of the exhaust main pipe,
The lower body includes a threaded portion formed in an opening of a tube with a built-in backflow prevention valve, a backflow prevention valve structure provided inside the tube with a built-in flow prevention valve, An exhaust pipe with a backflow prevention valve, comprising: a front end inlet for taking in gas such as water vapor and organic volatile matter generated in the water.

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