JPH0412903Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a waterproof sheet with a deaeration member that is effectively used for waterproofing the roofs of houses, concrete buildings, etc., especially flat roofs such as rooftops.

BACKGROUND TECHNOLOGY In recent years, exposed parts such as flat roofs of houses and concrete buildings have been treated with asphalt waterproofing, waterproofing with plastic sheets, etc. in order to prevent water from penetrating or seeping into the interior. Treatments such as waterproofing with paint films are commonly performed.

Problems that the invention aims to solve However, when such waterproofing treatment is performed,
Apart from water leakage, another major problem is the phenomenon of ``swelling,'' in which the moisture contained in the concrete layer that is first poured is heated by the sun's heat and evaporates, gradually pushing up the waterproofing layer due to steam pressure. This is pointed out as a point.

For this reason, various deaerators have been proposed to prevent this swelling phenomenon, but when using these deaerators, the completed waterproofing layer must be cut open and installed, which requires construction work. It is complicated and there are problems in waterproofing the incision.
Furthermore, if the part where the deaerator is to be installed is cut out in advance, it still requires a considerable amount of effort to waterproof the part.

There is also a method of more complete waterproofing by pouring more concrete on top of this waterproof layer, but in this case, the moisture remaining in the first concrete layer cannot escape to the outside, and the building This caused mold to grow inside buildings.

Therefore, for flat roofs, there is an urgent need to develop materials that allow moisture remaining in the concrete to evaporate to the outside, and the use of waterproof sheets is particularly convenient from the standpoint of waterproofing construction. There has been a demand for a waterproof sheet that has the function of allowing water in concrete to escape to the outside.

This idea was created in view of these circumstances,
Concrete that has been waterproofed with a waterproof sheet The moisture remaining inside the concrete of the flat roof part is effectively dissipated to the outside, and after the moisture has finished evaporating, rainwater etc. can be removed from the concrete poured under the waterproof sheet. It is an object of the present invention to provide a waterproof sheet having a degassing function that can maintain a sealed state so that the waterproofing effect is not lost due to intrusion into the interior.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention includes a cylindrical frame in which a breathable membrane and a sealing body made of a hot-melt resin having through-holes are provided in the frame. The degassing members are respectively disposed so as to close the hollow portions of the waterproof sheet, and are attached so as to cover the ventilation holes formed in the main body of the prevention sheet so that the sealing body is located on the main body side of the waterproof sheet.

In this case, it is preferable to arrange the breathable membrane and the sealing body at a distance from each other, and also to cover the opening of the frame on the side where the sealing body is disposed with a lid body having a through hole. This is preferable because it more reliably prevents rainwater from entering the inside of the concrete or building through the waterproof layer during evaporation and dissipation of water vapor.

Function The waterproof sheet of the present invention is constructed by attaching the above-mentioned deaeration member to the main body of the tarpaulin covering the ventilation holes provided for dissipating water vapor. When a waterproof sheet is installed as a waterproof layer on the exposed part of a flat roof, even if the moisture remaining in the concrete below the treated layer is warmed by solar heat, this water vapor will pass through the ventilation holes in the waterproof sheet. The gas enters the hollow part of the degassing member, passes through the breathable membrane, and is then diffused to the outside through the through hole of the sealing body and, if a lid is attached, through the through hole of the lid. Therefore, it is possible to reliably prevent the phenomenon of "bulging" of the waterproofing layer due to water vapor generated from the concrete.

In addition, after the above-mentioned generation of water vapor from the concrete has finished and no more water vapor is observed to dissipate, the heat-melting resin placed on the member as a sealant is heated and melted, and the pre-formed This prevents rainwater, etc. from entering from outside by blocking the through-holes. Further, in order to close the through hole, molten resin may be newly supplied. As a result, the sealing body completely closes the hollow part of this member and blocks the evaporation of water vapor and the inflow of moisture from the outside.
Even if ventilation holes are still formed in the main body of the waterproof sheet, the waterproof layer becomes sealed and this sealed state is maintained, thereby reliably preventing moisture such as rainwater from leaking into the building interior. I can do it.

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment FIG. 1 shows a waterproof sheet according to an embodiment of the present invention. This waterproof sheet is made of a synthetic resin sheet such as polyethylene, polypropylene, or ethylene-vinyl acetate copolymer, or a sheet laminated with metal foil, etc. The waterproof sheet 1 is made of a water-impermeable sheet such as a composite sheet, and a deaeration member 3 is attached to cover a vent hole 2 formed in the waterproof sheet 1 for water vapor permeation.

This deaeration member 3 includes a short-axis cylindrical frame body 5 with a ring plate-shaped flange portion 4 integrally protruding from the outer peripheral edge of the lower end. A ring plate-shaped support 6 is provided protruding from the inner peripheral surface of the frame 5, and a breathable membrane 7 is provided on the support 6 in the hollow part 5 of the frame 5.
Further, above this breathable membrane 7, a sealing body 8 made of a hot melt resin is placed slightly apart from this breathable membrane 7 in the hollow part of the frame 5. 5a. This sealing body 8 is formed in the shape of a disk with a concave lower surface, and its outer circumferential surface is in close contact with the inner circumferential surface of the frame body 5, and the outer circumferential edge of the lower end presses against the breathable membrane 7. 7
is fixed, and the lower surface is formed in a concave shape, so that it is separated from the membrane 7 and a space 9 is formed between the membrane 7 and the membrane 7.
is formed. Further, approximately in the center of the sealing body 8, there is a through hole 10 for dissipating water vapor to the outside.
is drilled. 11 is a cylindrical lid body with a head;
It is removably fitted in a liquid-tight manner to the side of the frame body 5 on which the sealing body 8 is disposed. The height (axial length) of the side wall 12 of this lid body 11
is formed higher (longer) than the height (axial length) of the frame 5, and when the lid 11 is attached to the frame 5, the lower end surface of the side wall 12 of the lid 11 is aligned with the frame 5 as shown in the figure. At the same time, in this state, the upper end surface of the frame 5 or the upper surface of the sealing body 8 and the upper wall 1 of the lid 11
A gap 14 is formed between the lower surface of the base plate 3 and the lower surface of the base plate 3. Further, a through hole 15 is formed in the upper part of the side wall 12 of the lid 11, which communicates the gap 14 with the outside of the lid 11 when the lid 11 is attached to the frame 5 as described above. .

Here, the frame body 5 having the flange portion 4 can be formed from metal, synthetic resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyvinyl chloride, etc., but it can be formed from a thermoadhesive waterproof sheet. In the case of thermal bonding, a frame body including a flange portion made of a synthetic resin having thermal adhesive properties and having a relatively low melting point such as ethylene-vinyl acetate copolymer;
It is preferable to form at least a flange portion.

The size of the frame 5 is 3 to 20 mm in height, and the size of the flange 4 is 20 to 150 mm in diameter when the shape is circular.
It is preferably about 25 mm to 40 mm, and if the shape is rectangular, it is preferably about 20 to 100 mm on a side.

The breathable membrane may be a microporous synthetic film that is permeable to water vapor but impermeable to water, such as Gore-Tex (trade name) made from a film made of a water-repellent synthetic resin such as tetrafluoroethylene. can be used effectively.

Further, as the heat-melting resin forming the sealing body 8, a hot melt adhesive made of ethylene-vinyl acetate copolymer or the like can be used. Note that the size of the through hole 7 formed in the sealing body 8 is 0.1 in diameter.
It is preferable to set it to about 10 mm.

Further, the lid body 11 can be made of metal, synthetic resin, or the like. Further, the through hole 15 formed in the lid 11 can be formed in an appropriate shape and size, such as circular, rectangular, dotted, or slit-shaped.

In the embodiment shown in FIG. 1, the deaeration member 3 covers the ventilation hole 2, and its flange portion 4 is attached to the waterproof sheet main body 2 by thermal bonding.

FIG. 2 shows another embodiment of the present invention, in which the frame 5 is formed into a cylindrical shape with a bottom, and a number of holes 16 for water vapor transmission are formed in the bottom of the frame 5.

Further, FIG. 3 shows yet another embodiment of the present invention, in which the support body 6 is formed into a disk shape, and a large number of water vapor permeation holes 1 are formed in the support body 6.
7 is perforated, and a breathable membrane 7 is placed on the support 6, and a circular cap-shaped protector 19 made of metal or synthetic resin with a through hole 18 in the center is provided with a ventilating membrane 7 at the outer circumference of the lower end. The sealing body 8 is placed on the protective body 19 so as to press down on the sexual membrane 7 . In addition, in this example,
An adhesive layer 20 is formed on the lower surface of the flange portion 4, and is attached to the waterproof sheet main body 1 by this adhesive layer 20.

Note that the other configurations of the embodiment shown in FIGS. 2 and 3 are the same as the embodiment shown in FIG. 1, and therefore a description thereof will be omitted.

The above-mentioned waterproof sheet, for example, is rolled up and transported to the site and used for waterproofing work on flat roofs, but when waterproofing is carried out using this waterproof sheet, the moisture in the concrete is warmed by solar heat etc. Even if it evaporates, this water vapor is mainly absorbed by the tarpaulin sheet.
It enters the hollow part 5a of the frame body 5 through the ventilation hole 2, passes through the breathable membrane 7, and then passes through the air hole 9, the through hole 10 of the sealing body 8, the gap 14, and the through hole 15 of the lid body 11 in order. pass through and escape to the outside. Therefore, the occurrence of bulges as described above is prevented. In this case, a void 9 is formed between the air-permeable membrane 7 and the sealing body 8, and the air-permeable membrane 7 effectively exhibits its function, so that water vapor permeates smoothly. In addition, this breathable membrane 7 does not allow water (liquid) to pass through, and since the frame 5 is covered with a lid 11 and the through hole 15 of the lid 11 is formed on the side, rainwater etc. It is difficult to penetrate inside.

Further, after the moisture evaporation in the concrete has subsided, the lid 11 is removed and the sealing body 8 is heated to melt the hot melt resin, thereby closing the through hole 10 of the sealing body 8. . Alternatively, molten resin is separately supplied to the through hole 10 to fill and close the through hole 9. Then, if necessary, reattach the lid 11,
Depending on the case, concrete is also placed on top of the waterproof sheet or waterproof layer. Therefore, by closing the through hole 10, the hollow part 5a of the frame 5 is completely airtightly closed, and the ventilation hole 14 is formed in the waterproof sheet or waterproof layer.
Even if they remain formed, they become sealed and this sealed state is maintained, and the waterproof function is effectively exhibited.

Note that the structure of the degassing member of the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways within the scope of the gist of the present invention.

Effects of the invention As explained above, the waterproof sheet of the invention has the following effects:
A degassing member is made of a cylindrical frame in which an air-permeable membrane and a sealing body made of a heat-melting resin having through-holes are arranged so as to close the hollow part of the frame. Since the sealing body is installed so as to cover the ventilation holes formed in the main body of the sheet and to be located on the main body side of the waterproof sheet, it is possible to effectively dissipate water vapor generated from the concrete to the outside, and also to dissipate the water vapor. After that, the through holes can be easily closed by melting the hot-melt resin, so rainwater does not enter from the outside and the waterproof effect of flat roofs, etc. can be maintained completely and for a long period of time.

[Brief explanation of the drawing]

1 to 3 are sectional views each showing an embodiment of the present invention. 1... Waterproof sheet main body, 2... Ventilation holes, 3...
Deaeration member, 5...frame body, 5a...hollow part, 7...
...Breathable membrane, 8...Sealing body, 9...Empty, 10...
...Through hole, 11...Lid body, 15...Through hole.

Claims (1)

[Claims for Utility Model Registration] 1. A breathable membrane and a sealing body made of a heat-melting resin having through holes are arranged in a cylindrical frame so as to close the hollow part of the frame. 1. A waterproof sheet, characterized in that a deaeration member made of the above is attached so as to cover ventilation holes formed in the main body of the waterproof sheet so that the sealing body is located on the side of the main body of the waterproof sheet. 2. A waterproof sheet according to claim 1 of the utility model registration claim, in which a breathable membrane and a sealing body are arranged between each other. 3. The waterproof sheet according to claim 1 or 2 of the utility model registration claim, which has a lid having a through hole covering the opening of the frame on the sealing body side.