JP2003293525A - Waterproof-sheet fixture and method for fixing waterproof sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out the fixing works of a waterproof sheet in the same workability as a steel plate in which a hot melt heat-fusion resin is laminated on the top face of the conventional steel plate, and to fix the waterproof sheet on a surface, on which the sheet is laid, for a prolonged term. <P>SOLUTION: In the waterproof-sheet fixture A for fixing the waterproof sheet on the surface, on which the sheet is laid, interposing the waterproof sheet between the waterproof sheet B made of a synthetic resin and the surface C, a welding layer 2 fixed on the waterproof sheet side is laminated and unified on the top face of a stationary plate 1 fixed on the surface side, on which the sheet is laid, and the welding layer 2 is composed of a thermoplastic synthetic resin layer 21 laminated on the top face of the stationary plate 1 and a hot melt heat fusion material layer 22 being laminated on the layer 21, having a melting temperature lower than a thermoplastic synthetic resin and being heat-fused to the waterproof sheet. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin waterproof sheet and a surface to be laid on the waterproof sheet for a flat roof or a pitched roof of a building, a floor surface of a veranda or a roof balcony of a house, or a civil engineering waterproofing work. More specifically, the present invention relates to a waterproof sheet fixing tool for mechanically fixing the waterproof sheet on a target surface to be laid and a method for fixing the waterproof sheet using the waterproof sheet fixing tool, and more specifically, to the target surface to be laid. The present invention relates to a waterproof sheet fixing device in which a waterproof sheet is melt-integrated by thermal welding using an induction heating treatment device and a waterproof sheet fixing method using the waterproof sheet fixing device. .

[0002]

2. Description of the Related Art As one of the methods for mechanically fixing a soft synthetic resin waterproof sheet to a surface to be laid, a hot-melt type heat-welding resin is laminated on the surface of a disk-shaped (circular) steel plate. There is a fixing method using a fixing tool made of. In this method, the waterproof sheet fixture is previously fixed to the laying target surface of the waterproof sheet with screws or the like, and the waterproof sheet is covered from above to secure the waterproof sheet fixture between the waterproof sheet and the laying target surface. An induction heating device is placed on the upper surface of the waterproof sheet at a position corresponding to the waterproof sheet fixing tool, and the waterproof sheet is laminated on the surface of the disk-shaped steel sheet by induction heating. The waterproof sheet is mechanically fixed to the laying target surface by being melt-integrated with the layer. (See JP-A-11-200563, etc.)

[0003]

However, in the above-mentioned conventional method, since the waterproof sheet fixing tool is covered with the waterproof sheet and the surface to be laid in a hermetically sealed state, the evaporation of water contained in the surface to be laid is carried out. It is inevitable that moisture will be trapped between the waterproof sheet and the surface to be laid due to the effect of condensation and dew condensation, resulting in a high humidity condition. This humid condition does not cause a problem with respect to the adhesiveness between the waterproof sheet fixing tool, that is, the hot-melt heat-welding resin layer laminated on the surface of the disc-shaped steel sheet and the waterproof sheet, but it does not affect the disc-shaped steel sheet and its surface. The adhesive strength with the laminated hot-melt heat-welding resin is reduced. For this reason, there is a concern that the waterproof sheet may be peeled off and blown off from the waterproof sheet fixture when the waterproof sheet is subjected to wind sway over time.

Therefore, the waterproof sheet is fixed by using a vinyl chloride coated steel sheet having a structure similar to that of the waterproof sheet fixing device (a steel sheet whose surface is coated with a soft vinyl chloride resin, commonly referred to as "vinyl chloride steel sheet"). Although it is possible to make a tool, since the melting temperature (gelling temperature) is higher than that of vinyl chloride resin, induction heating time is extended compared to the case where hot-melt heat-sealing resin is laminated on the upper surface of steel sheet. In addition to inferior properties, induction heating until the vinyl chloride resin coating the surface of the steel plate gels causes the steel plate to rise to a temperature above the melting temperature (gelling temperature) of the vinyl chloride resin, resulting in , The adhesive strength of the vinyl chloride resin layer to the steel plate is reduced, and even if the waterproof sheet is heat-welded to the vinyl chloride resin film of the waterproof sheet fixture (steel plate), the waterproof sheet remains solid. There is a problem that the easily peeled from the ingredients.

The present invention has been made in view of the above problems, and its object is to fix the waterproof sheet in the same manner as the conventional method in which a hot-melt heat-welding resin is laminated on the upper surface of a steel sheet. It is an object of the present invention to provide a waterproof sheet fixture and a method for fixing a waterproof sheet, which can be installed with no workability and can fix the waterproof sheet to the laying target surface for a long period of time.

[0006]

The waterproof sheet fixing device of the present invention for solving the above-mentioned problems fixes the waterproof sheet to the laying target surface by interposing it between the synthetic resin waterproof sheet and the laying target surface. A tarpaulin fixing tool for
A thermoplastic synthetic resin layer in which a welding layer fixed to the waterproof sheet side is integrally laminated on the upper surface of a fixing plate fixed to the laying target surface side, and the welding layer is laminated on the upper surface of the fixing plate. And a hot-melt heat-welding material layer which is laminated on the thermoplastic synthetic resin layer and has a lower melting temperature than the thermoplastic synthetic resin and heat-welds to the waterproof sheet. Is. Further, the method for fixing a waterproof sheet according to the present invention uses the above-mentioned waterproof sheet fixing tool, and after fixing the fixing plate side of the waterproof sheet fixing tool to the laying target surface, laying a synthetic resin waterproof sheet. Cover the target surface, place an induction heating device on the top surface of the waterproof sheet at a position corresponding to the waterproof sheet fixture, and the induction sheet to form the waterproof sheet and the hot-melt heat-welding material layer of the waterproof sheet fixture. The waterproof sheet is fixed to the waterproof sheet fixture by fusion and integration. At this time, a vinyl chloride resin is used as the waterproof sheet, the thermoplastic synthetic resin layer in the welding layer of the waterproof sheet fixture is made of a vinyl chloride resin layer, and the hot melt heat-welding material layer is made of a polyester resin. It is preferable to use.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the embodiments. FIG. 1 is a schematic cross-sectional view illustrating the structure of the waterproof sheet fixing tool A according to the present invention.
Shows a schematic cross-sectional view for explaining a state in which the waterproof sheet B is fixed to the laying target surface C using the waterproof sheet fixing tool A.

The waterproof sheet fixing tool A according to the present invention is constructed by laminating and integrally laminating a welding layer 2 fixed on the waterproof sheet B side on the upper surface of a fixing plate 1 fixed on the laying target surface C side. By the way, examples of the laying target surface C include a flat roof or a pitched roof of a building, a floor surface of a veranda or a roof balcony of a house, or a waterproofing work for civil engineering.

The fixing plate 1 fixed to the surface C to be laid is not particularly limited, but it is in a high humidity state such as a stainless steel plate or a steel plate which has been subjected to anticorrosion treatment such as zinc / aluminum / magnesium plating or zinc plating. Also, a steel plate that is resistant to rust is preferably used. Further, the fixing plate 1 is formed to have the same thickness and shape as the steel plate used in the conventional waterproof sheet fixing device of this type. That is, for example, the thickness is about 0.6 to 1 mm, and the shape is arbitrary, such as a plate shape formed in a square shape having a square shape or a rectangular shape, a disk shape formed in a circular shape or an elliptical shape shape, and a size. Is formed with one side or an outer diameter of about 50 to 100 mm, and the waterproof sheet fixture A
A screw fixing hole 3 for inserting a screw D for fixing the screw to the laying target surface C side is formed.

The screw fixing hole 3 of the waterproof sheet fixing tool A is preferably formed so that the head portion D'of the fixing screw D does not protrude from the waterproof sheet fixing tool A. Further, the peripheral edge on the back side of the fixing plate 1 is formed. The edges are preferably formed by slightly bending inward for reinforcement. Then, the welding layer 2 is formed on the fixed plate 1.
In the case of integrally laminating, the fixing plate 1 may be punched before or after punching into a predetermined shape, but in consideration of productivity, it is better to punch and form the welding layer 2 after laminating.

The welding layer 2 laminated and integrated on the upper surface of the fixing plate 1 and fixed to the waterproof sheet B side is composed of a thermoplastic synthetic resin layer 21 directly laminated and integrated on the upper surface of the fixing plate 1, and the thermoplastic resin layer 21. The hot-melt type heat-welding material layer 22 is laminated on the synthetic resin layer 21 and has a lower melting temperature than the thermoplastic synthetic resin and heat-welds to the waterproof sheet B.

The thermoplastic synthetic resin used for the thermoplastic synthetic resin layer 21 directly laminated on the upper surface of the fixing plate 1 includes polyethylene, polypropylene, ethylene vinyl acetate copolymer, EEA (ethylene ethyl acrylate), etc. Examples of the olefin resin, vinyl chloride resin, polyester resin, acrylic resin, urethane resin and the like. These thermoplastic synthetic resins are laminated and integrated on the upper surface of the fixing plate 1 to a thickness of 0.1 to 0.5 mm by a known method such as a paste sol coating coating method or a sheet laminating method to obtain a thermoplastic synthetic resin. Layer 21 is formed. If the thickness of the thermoplastic synthetic resin layer 21 is less than 0.1 mm, the required adhesive strength cannot be obtained,
If it is thicker than 0.5 mm, the conductivity of heat from the fixed plate 1 becomes slower, so that it is necessary to lengthen the heating time, which leads to poor workability. In addition, if the heating time becomes long, the temperature of the fixing plate 1 becomes too high, and peeling may occur between the thermoplastic synthetic resin layer 21 and the fixing plate 1. Therefore, it is preferably about 0.5 mm at the maximum. At this time, as a rustproofing treatment for the fixing plate 1, it is preferable that the thermoplastic synthetic resin is laminated and integrated on the back surface to a thickness of 0.1 to 0.5 mm.

The hot-melt type heat-welding material layer 22 which is heat-welded to the waterproof sheet B side includes ethylene vinyl acetate type resin, olefin type resin, polyester type resin, polyamide resin, synthetic rubber and the like. However, in use, a material whose melting temperature is lower than the melting point of the thermoplastic synthetic resin layer 21 is selected. That is, for example, when the thermoplastic synthetic resin layer 21 is formed of a vinyl chloride resin or a polyester resin, a polyester resin having a lower melting point than that of the hot melt thermal adhesive material layer 22 is used. The hot-melt heat-welding material layer 22 has a surface area of the thermoplastic synthetic resin layer 21 of 0.05 to
Laminated to a thickness of 0.3 mm. If the thickness of the hot-melt heat-welding material layer 22 is too thin (thinner than 0.05 mm), unwelded portions due to shrinkage voids are likely to occur during melting, and if it is too thick (thicker than 0.3 mm), the waterproof sheet during melting. Not only is it wrinkled easily, but it takes time to melt and cool, and the workability deteriorates.

When the melting temperature of the hot-melt type heat-welding material layer 22 is equal to or higher than the melting temperature of the thermoplastic synthetic resin layer 21, the hot-melt type heat-welding material layer 22 is used.
Since the adhesion failure between the thermoplastic synthetic resin layer 21 and the thermoplastic synthetic resin layer 21 and the adhesion failure between the thermoplastic synthetic resin layer 21 and the fixing plate 1 may occur, the melting temperature of the hot-melt heat-welding material layer 22 is set to the thermoplastic synthetic resin layer 21. It is preferable to lower the melting point of 21 to 20 ° C. to 50 ° C. Because, when the induction heating is performed by the induction heating device, the heat is generated by the thermoplastic synthetic resin layer 21.
Since the temperature is transmitted to the hot-melt type heat-welding material layer 21 from the above, if the melting temperatures are close to each other, the thermoplastic synthetic resin layer 22 melts and the base material cannot be maintained. The better is the difference. At this time, the surface temperature of the waterproof sheet may rise to about 80 ° C. in the summer environment, and when the hot-melt heat-welding material layer 22 melts at this temperature, the adhesiveness decreases and the waterproof sheet fixture A Since the waterproof sheet B may be easily peeled off, the melting point of the hot-melt heat-welding material layer 22 is preferably 100 ° C. or higher and 140 ° C. or lower.

When the hot-melt heat-welding material layer 22 is laminated on the upper surface of the thermoplastic synthetic resin layer 21, the hot-melt heat-welding material is heated and melted at 100 to 150 ° C.
The thermoplastic synthetic resin layer 2 is obtained by passing the fixing plate 1 formed by laminating the thermoplastic synthetic resin layer 21 in advance between the rolls.
1 is formed by laminating a hot-melt type heat-welding material layer 22 on the upper surface of 1, or a solution obtained by dissolving the hot-melt type heat-welding material in a solvent such as methyl ethyl ketone, tetrahydrofuran, cyclohexanone, or toluene is used as the thermoplastic synthetic resin layer 21.
The hot-melt type heat-welding material layer 22 is laminated and formed on the upper surface of the thermoplastic synthetic resin layer 21 by applying it on the upper surface and drying it.

According to an experiment, a soft vinyl chloride resin is laminated as the thermoplastic synthetic resin layer 21 on the fixing plate 1, and then the hot melt type thermal adhesive material layer 22 is made of a polyester type resin on the upper surface of the thermoplastic synthetic resin layer 21. Even if a waterproof sheet made of a soft vinyl chloride resin is welded to a waterproof sheet fixture A formed by laminating heat-welding materials while heating it to about 200 ° C., the thermoplastic synthetic resin layer 21 is peeled from the fixing plate 1. It was confirmed that the adhesiveness was so good that there was no such a case, and no decrease in adhesion was observed even when it was immersed in warm water at 60 ° C. for 168 hours, and both heat resistance and water resistance were excellent. From this, soft vinyl chloride resin coated steel sheet (commonly called PVC steel sheet)
A waterproof sheet fixture A formed by laminating a hot-melt polyester resin (hot-melt heat-sealing material layer 22) on the surface of the sheet
Is excellent in water resistance, a vinyl chloride resin waterproof sheet B is placed on the waterproof sheet fixing tool A, and fusion-bonding is performed from above the waterproof sheet B with an induction heating device to obtain hot melt on the surface of the waterproof sheet fixing tool A. Water resistance deterioration of the polyester resin (hot-melt heat-sealing material layer 22) melted and welded to the waterproof sheet B is much less than that of the fixing plate 1 directly laminated with the hot-melt polyester resin, which is a waterproof sheet. It was confirmed that the durability of the construction method of fixing the fixture A to the laying target surface C in advance was significantly improved.

Next, a method of fixing the waterproof sheet B to the laying target surface C using the waterproof sheet fixing tool A will be described. A plurality of waterproof sheet fixtures A are arranged with the fixing plate 1 side down on the laying target surface C at intervals of 60 to 1000 mm, and the waterproof sheet fixtures A are fixed to the laying target surface C with screws D in advance. Then, the waterproof sheet B is covered from above and the laying target surface C is covered with the waterproof sheet B. After that, an induction heating device (not shown) is placed on the upper surface of the waterproof sheet B at a position corresponding to the waterproof sheet fixing tool A, and the hot-melt thermal adhesive material in the welding layer 2 of the waterproof sheet fixing tool A is placed by induction heating. The layer 22 is melted and the back surface side of the waterproof sheet B is melted and integrated with the welding layer 2 of the waterproof sheet fixture A, whereby the waterproof sheet B is welded and fixed to the waterproof sheet fixture A. This work is performed on all the waterproof sheet fixtures A to fix the waterproof sheet B to the laying target surface C.

Next, a concrete example will be described. Example 1 A stainless steel plate (SUS304) having a thickness of 0.6 mm is used as the fixing plate 1, and a soft vinyl chloride resin sheet (melting temperature 175 ° C.) having a thickness of 0.3 mm is formed on the surface thereof as the thermoplastic synthetic resin layer 21. Then, a vinyl chloride resin-coated steel sheet was obtained. A disk was formed from this vinyl chloride resin-coated steel sheet by punching into a circular shape having an outer diameter of 80 mm having a screw hole 3 of φ8 mm in the center. next,
The soft vinyl chloride resin surface (thermoplastic synthetic resin layer 2
1) 150 ° C. as the hot-melt heat-welding material layer 22
A hot-melt polyester resin (melting temperature: 120 ° C.) heated and melted on was applied to a thickness of 0.15 mm and cooled to obtain a waterproof sheet fixture A. Then, cover the waterproof sheet fixture A with a 2 mm soft vinyl chloride resin waterproof sheet B, place an induction heating device on the waterproof sheet at a position corresponding to the waterproof sheet fixture A, and oscillate for 5 seconds. Then, the hot-melt heat-welding material layer 22 (hot-melt polyester resin) was induction-heated and melted to weld the waterproof sheet B to the welding layer 2 of the waterproof sheet fixture A. The normal peel strength of the waterproof sheet fixture A and the waterproof sheet B of this product is 215 kg, and the peel strength of the waterproof sheet fixture A and the waterproof sheet B after being immersed in warm water at 60 ° C. for 168 hours is 180 kg, which is higher than the normal peel strength. Water resistance retention rate (= (peel strength / normal peel strength) * 100) is 84
%Met.

<Comparative Example> A disk of the same size was prepared using the same stainless steel plate (SUS304) as in Example 1, and the disk surface was heated and melted at 150 ° C. while being passed between rolls. A melt polyester resin (melting temperature: 120 ° C.) was applied to a thickness of 0.15 mm and cooled to obtain a waterproof sheet fixture A. Then, cover the waterproof sheet fixture A with a 2 mm soft vinyl chloride resin waterproof sheet B, place an induction heating device on the waterproof sheet at a position corresponding to the waterproof sheet fixture A, and oscillate for 5 seconds. The hot melt polyester resin laminated on the surface of the disk was induction-heated and melted to fuse the waterproof sheet B to the hot melt polyester resin layer of the waterproof sheet fixture A. Waterproof sheet fixing tool A for this
And the waterproof sheet B had a normal peel strength of 235 kg, but the waterproof sheet fixture A and the waterproof sheet B had a peel strength of 110 kg after being immersed in warm water at 60 ° C. for 168 hours, and the water resistant strength retention ratio with respect to the normal peel strength was It was 47%.

[0020]

As described above, the waterproof sheet fixing device of the present invention is formed by integrally laminating the welding layer fixed on the waterproof sheet side on the upper surface of the fixing plate fixed on the laying target surface side, and fixing the welding layer. A thermoplastic synthetic resin layer laminated on the upper surface of the plate, and a hot-melt type heat-welding material layer laminated on the thermoplastic synthetic resin layer and having a lower melting temperature than the thermoplastic synthetic resin and heat-welding to a waterproof sheet. Since it is composed of, the work of fixing the waterproof sheet can be done with the same workability as that of the conventional hot-melt heat-sealing resin laminated on the upper surface of the steel plate, and the waterproof sheet can be laid on the surface to be laid for a long period of time. Can be fixed to. That is, since the welding layer to be welded to the waterproof sheet is composed of a thermoplastic synthetic resin layer laminated on the upper surface of the fixing plate and a hot-melt type heat-welding material layer having a lower melting temperature than the thermoplastic synthetic resin, the steel sheet Compared with the conventional waterproof sheet fixture with hot-melt polyester resin laminated on it, it has superior adhesive and water resistance to the waterproof sheet. Therefore, it is possible to improve water resistance deterioration due to moisture from the laying target surface, and waterproof sheet fixture It is possible to greatly improve the durability of fixing the waterproof sheet.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view illustrating the structure of a waterproof sheet fixing tool according to the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a state in which a waterproof sheet is fixed to a laying target surface using the waterproof sheet fixing tool according to the present invention.

[Explanation of symbols]

A: Tarpaulin fixture B: Waterproof sheet C: Surface to be laid D: Screw 1: Fixed plate 2: Weld layer 21: Thermoplastic synthetic resin layer 22: Hot-melt type heat-welding material layer 3: Screw hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Suzuki Etsuyuki             5-3 Honakakanuki-cho, Tsuchiura City, Ibaraki Prefecture Ronseal             Industrial Co., Ltd. Tsuchiura Works

Claims (3)

[Claims] 1. A waterproof sheet fixture for fixing a waterproof sheet to a laying target surface by interposing it between a synthetic resin waterproof sheet and the laying target surface, which is fixed to the laying target surface side. A welding plate fixed to the waterproof sheet side is integrally laminated on the upper surface of the fixing plate, and the welding layer is
A thermoplastic synthetic resin layer laminated on the upper surface of the fixing plate,
Fixing of a waterproof sheet characterized by comprising a hot-melt type heat-welding material layer laminated on the thermoplastic synthetic resin layer and having a lower melting temperature than the thermoplastic synthetic resin and heat-welding to the waterproof sheet. Ingredient 2. The waterproof sheet fixing device according to claim 1, which is fixed to the laying target surface with the fixing plate side of the waterproof sheet fixing device facing down, and then the synthetic resin waterproof sheet is laid on the laying target surface. By covering, the induction heating device is placed on the upper surface of the waterproof sheet at a position corresponding to the waterproof sheet fixing tool, and the waterproof sheet and the hot-melt heat-welding material layer of the waterproof sheet fixing tool are melted and integrated by induction heating. Thus, the waterproof sheet is fixed to the waterproof sheet fixing tool, thereby fixing the waterproof sheet. 3. The waterproof sheet is made of vinyl chloride resin, the thermoplastic synthetic resin layer of the welding layer in the waterproof sheet fixture is made of vinyl chloride resin layer, and the hot-melt type heat welding material layer is made of polyester resin. The method for fixing a waterproof sheet according to claim 2, wherein