JP2009013609A - Waterproof sheet fixing bracket, waterproof structure, and application method for waterproof sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of waterproofing work for a metallic substrate by applying a non-induction-heatable material layer to a waterproof sheet fixing bracket. <P>SOLUTION: This waterproof sheet fixing bracket 3 is used for applying a waterproof sheet 1 onto the metallic substrate 2 by electromagnetic induction heating. The waterproof sheet fixing bracket 3 comprises an induction-heatable metallic member 3A and the non-induction-heatable material layer 3B composed of a non-induction-heatable metal; a waterproof-sheet jointing surface of the induction-heatable metallic member 3A is equipped with a hot-melt adhesive layer; and the non-induction-heatable material layer 3B is provided between the induction-heatable metallic member 3A and the induction-heatable metallic substrate 2. The efficiency of the waterproofing work can be improved by the waterproof structure using the waterproof sheet fixing bracket 3, and an application method for the waterproof sheet. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a waterproof sheet fixing hardware, a waterproof structure and a waterproof sheet construction method for constructing a waterproof sheet on a metal base by electromagnetic induction heating.

It is known that a conductor piece is heated by high-frequency induction heating, and a waterproof sheet is fused with the conductor piece to waterproof the building (see, for example, Patent Document 1).
JP 04-254649 A

  Induction heating (IH, Induction Heating) heats conductive metal, and when there is a metal substrate with a conductive metal plate directly under the waterproof sheet fixing bracket, the metal plate is also heated to set the fixing bracket. In the case of efficient induction heating in a short time that cannot be sufficiently heated in time, a poor fusion occurs between the waterproof sheet and the fixed hardware, and therefore the fusion time becomes longer or the high-frequency output is further increased. Such considerations are necessary and inefficient construction work is forced.

  The problem to be solved is that, as described above, the construction of the waterproof sheet on the metal base depends on the characteristics by induction heating and requires time and output, and the work efficiency is improved and the work does not require skill. This is the subject of the present invention.

  The present invention relates to a waterproof sheet fixing hardware for constructing a waterproof sheet on a metal base by electromagnetic induction heating, and a non-inductive heatable material composed of an induction heatable metal member and a noninductive heatable metal The induction heating metal member includes a heat-melting adhesive layer on a waterproof sheet bonding surface, and the non-induction heating material layer includes the induction heating metal member and the induction heating metal base. The waterproof sheet fixing metal provided between the two, a waterproof structure using the fixed metal, and a construction method of the waterproof sheet.

  According to the present invention, an electromagnetic wave of high-frequency induction heating is transmitted to the metal plate by installing a non-inductive heating material layer such as an aluminum foil between the metal base such as the metal plate directly below and the fixture. Can be prevented, and the fixing bracket can be efficiently heated.

  The present invention aims at electromagnetic induction by using a non-inductive heating material layer with a waterproof sheet fixing hardware for the purpose of simplification, simplification, shortening, etc. of work for waterproofing work such as a metal base roof. Realize without losing the technical advantages of heating.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of induction heating. FIG. 2 is a perspective view of an example metal substrate and an example waterproof sheet fixing hardware.

  As shown in FIGS. 1 and 2, for the induction heating metal substrate 2 on which the waterproof sheet 1 is to be applied, the aluminum substrate is interposed between the metal substrate 2 and the induction heating metal member 3A of the waterproof sheet fixing hardware 3. By installing a non-inductive heating material layer 3B such as a foil and heating the induction heating metal member 3A of the waterproof sheet fixing hardware 3 by the high frequency induction heating device 4 on the waterproof sheet 1, the waterproof sheet 1 It is fused to the waterproof sheet fixing hardware 3.

  In the present invention, the waterproof sheet fixing hardware, the waterproof structure, and the waterproof sheet construction method are the so-called roof sheet waterproofing work, in particular, the fusion method of the waterproof sheet and the waterproof sheet fixing hardware using a high frequency induction heating device, etc. It can be used, and the working time of waterproofing work such as a metal base roof can be greatly shortened.

  The metal base is not particularly limited and is used for a base to be waterproofed. The metal base is present on the surface portion of the structure to be waterproofed and occupies at least the surface of the waterproof sheet bonding portion. Metal bases may be scattered. The metal base includes a member made of induction-heatable metal, for example, a metal layer, and the metal layer can be heated by itself when high-frequency induction heating or the like is performed.

  The induction heating metal of the metal base is a conductor, and has an internal resistance and generates heat particularly on the surface thereof due to electromagnetic induction eddy current, like an induction heating metal member described later. The material is not particularly limited, but is typically made of iron or the like. As a metal base, it is often used as a steel metal plate such as a steel plate, a stainless steel plate, a plated steel plate, and a coated steel plate. Here, non-magnetic materials are also classified as materials that can be heated by induction, and adversely affect the metal base.

  As the induction-heatable metal base, a building member such as a roofing material on which the metal plate or the like is present can be used as a general term. However, when an induction heating metal layer is partially used on the surface of a building member or the like, the metal layer itself can also be referred to as an induction heating metal base as a target.

  The induction-heatable metal substrate is mainly used on a structural housing such as a roof of a building, and is, for example, a refractory roof material whose surface is treated with a steel plate. It also includes coverings for horizontal and vertical parts of buildings. The waterproof sheet fixing hardware is fixed, and the waterproof sheet is bonded onto the fixed hardware and covered with the waterproof sheet.

  The waterproof sheet is constructed on the surface of a metal base. It does not restrict | limit in particular, It can consist of various materials, materials, etc. Typical materials include rubber, asphalt, and thermoplastic resin. In view of durability, workability at the construction site, good workability, and the like, preferably, a thermoplastic resin, particularly preferably a polyvinyl chloride resin, is used. In the case of a thermoplastic resin waterproof sheet, by performing an insulation method in which a machine is partially fixed in a relatively small area, it is possible to omit removal and adjustment of the base, thereby shortening the waterproof work period.

  The waterproof sheet fixing hardware includes a non-inductive heating material layer composed of an induction heating metal member and a non-induction heating metal. The waterproof sheet fixing hardware includes a unit in which an induction heating metal member and a non-induction heating material layer are integrated, such as bonding, fixing, etc. It is a thing. The induction-heatable metal member itself can be heated by electromagnetic induction and can be heated by high-frequency induction heating. An induction heatable metal layer can be provided as a core material. A conductor fixing piece similar to the conventional one is used. For example, although not particularly limited, various shapes, preferably disk-shaped high frequency induction heating is possible, and a normal disk steel plate or a disk-shaped polyvinyl chloride resin-coated steel plate.

  The waterproof sheet fixing hardware and, if necessary, the waterproof sheet can be provided with a hot-melt adhesive layer. The hot-melt adhesive layer is provided on one or both of the waterproof sheet bonding surface of the induction heating metal member and the fixed metal bonding surface of the waterproof sheet, and enables sufficient bonding between the fixed metal and the waterproof sheet. Or it can promote and assist the joining. The hot-melt adhesive layer can be melted by the core material surface of the fixed hardware that is heated by electromagnetic induction. The hot melt adhesive layer is a thermoplastic resin, in particular, at least one material selected from the group consisting of commonly used olefin resins, polyvinyl chloride resins, hot melt resins, and more particularly polyimide resins, polyamide resins and the like. Can consist of

  The non-inductive heatable material layer is made of a non-inductive heatable metal. The non-inductive heatable material layer may be a metal layer made of a non-inductive heatable metal, and may contain a non-inductive heatable metal. Can be a material layer that also contains an induction heatable metal or the like. It is a layer of material in which electromagnetic induction heating is completely or almost impossible, or that is heated or not practically or economically disadvantageous or unsuitable by electromagnetic induction heating. Since the electromagnetic induction heating is a mechanism that generates high temperature generated from the coil to generate an eddy current in the metal to generate heat, the metal having high electrical conductivity does not generate an eddy current.

  The non-inductive heatable material layer may be made of a metal foil such as an aluminum foil, but one type of non-inductive heatable metal and another non-inductive heatable metal, non-metallic material and / or induction heatable. It can consist of a mixture of non-inductive heatable metal, non-inductive heatable metal powder or plate and other non-inductive heatable metal, nonmetallic material and / or induction It can consist of a mixture with a heatable metal, a powder of a nonmetallic material, or a plate-like body.

  The metal substrate is often applied to the entire surface, and even when the metal substrate is partially used, induction heating operation, heating temperature, heating, etc. according to its size, material, thickness, etc. Time is affected. Therefore, when installing an induction heating metal member for fixing a waterproof sheet directly on a metal base, a substance may be sandwiched between the metal base and an induction heating metal member for fixing a waterproof sheet. Even if there is a slight distance, the heating operation up to the set temperature required for fixing the waterproof sheet, the heating time, etc. are significantly affected by the metal base, making the waterproofing work unstable and waterproofing during normal working hours This results in poor sheet fusion and requires labor and skill.

  By installing a non-inductive heating material layer on the metal substrate directly or at a distance, the electromagnetic wave of high-frequency induction heating is prevented from being transmitted to the metal substrate and installed on the non-inductive heating material layer. The induction heating metal member can be efficiently heated. More specifically, the induction heating metal member placed on the non-induction heatable material layer is affected by the type, area, thickness, etc. of the metal substrate by the non-induction heating material layer below it. Efficient electromagnetic induction heating, the waterproof sheet can be fused to the fixed metal, and the heating work can be performed safely and reliably. The fear of heating due to the type and size of the base to be waterproofed, metal base, etc. The time required for waterproofing work can be greatly reduced without the need for investigating qualitative research and skill to deal with them, which can contribute to standardization and versatility of waterproofing work.

The non-inductive heatable material layer can be composed of a non-inductive heatable material having a volume resistivity (at 0 ° C.) of 8.0 × 10 ⁻⁸ Ω · m or less. Theoretically, there cannot be a material with a volume resistivity of 0Ω · m, and at least it does not exist at the present time. A material close to 0 Ω · m is preferable because the same effect can be obtained with a small amount, but in terms of material cost effectiveness, 0.5 × 10 ⁻⁸ Ω · m or more, 1.0 × 10 ⁻⁸ Ω · m or more, 2.0 × 10 ^-8 Ω ・ m or more, or 3.0 × 10 ^-8 Ω ・ m or more, 8.0 × 10 ^-8 Ω ・ m or less, and 0.5 × 10 ^-8 Ω ・ m or more, 7.0 × 10 ^-8 Ω • m or less, 6.5 × 10 ⁻⁸ Ω · m or less, 3.0 × 10 ⁻⁸ Ω · m or less, etc. The volume resistance measurement method is described in JIS C 2525, Standard name: Conductor resistance and volume resistivity test method of metal resistance material. It is measured in the same manner in the case of a non-inductive heatable material layer (excluding a metal single piece foil).

  The non-inductively heatable metal layer is preferably composed of a highly electrically conductive metal selected from the group consisting of aluminum, copper, gold, silver, brass, nickel and the like. A so-called non-magnetic material or non-conductor may be used. By installing what consists of these metals, it can prevent that a high frequency electromagnetic wave reaches | attains the metal under it. From the viewpoint of cost and versatility, aluminum foil or the like can be employed.

Low resistance materials with single metals have volume resistivity (0 ℃), silver: 1.47 × 10 ^-8 Ω ・ m, copper: 1.55 × 10 ^-8 Ω ・ m, gold: 2.05 × 10 ^-8 Ω ・ m m, aluminum: 2.50 × 10 ^-8 Ω · m, etc. Brass, which is an alloy of copper and zinc, has a ratio of 60:40, 70:30, etc., and its volume resistivity (0 ° C.) is 6.3 × 10 ⁻⁸ Ω · m. Indium is close to 8 × 10 ^-8 Ω · m. An element having a volume resistivity of indium or less, or an alloy containing an element somewhat higher than this volume resistivity in some cases, as long as it exhibits a volume resistivity (0 ° C.) of 8.0 × 10 ⁻⁸ Ω · m or less, It can be used as a non-inductive heating material layer.

  The non-inductive heatable material layer preferably has a size larger than the width, diameter, or area of the induction-heatable metal member, and is substantially concentrically overlapped with the induction-heatable metal member. It is practically advantageous to set the size of the induction heating metal member to be heated and the size of the coil of the electromagnetic induction heating device for induction heating. The non-inductive heatable material layer may be lacked by drilling or the like other than the outer peripheral portion, and may have a square hole, a circular hole, or the like. However, the outer peripheral part of the non-inductive heating material layer is at least the most important part for induction heating of the induction heating metal member, for example, the outer peripheral part thereof, so that the adverse effect of the induction heating base metal can be sufficiently prevented. It is necessary to block the induction heating base metal by overlapping with the induction heating base metal. Although it is possible to lay as a joint or on the entire metal base, partial installation is desirable in consideration of cost.

  The non-inductive heatable material layer is preferably annular (donut-shaped) and has an outer shape larger than the outer shape of the induction-heatable metal member and an inner shape smaller than that of the induction-heatable metal member. When the annular shape is an annular shape, the outer diameter is preferably larger than the outer shape of the induction heating metal member, and the inner diameter is preferably smaller than the induction heating metal member.

  As shown in FIGS. 1 and 2, in order to fix the waterproof sheet fixing hardware 3 on the metal base 2, an attachment hole 5 can be used. In addition, the waterproof sheet fixing hardware 3 can be fixed to a structural housing 7 such as C-type steel by using a fixing member 6 such as a fixing metal plug, an anchor, or the like, through the metal base 2 through the mounting hole 5. it can. The metal substrate 2 may be a refractory roof material, and may be composed of a core material 3A such as a heat insulating material such as polyisocyanurate foam, and steel plates 3B on the front and back surfaces.

  The waterproof sheet fixing hardware can be provided with a layer having a desired function such as a heat shielding member layer on one or both of the upper and lower non-inductive material layers. The heat shielding member layer prevents the heat of the induction heating metal member that is heated by electromagnetic induction from being conducted to the metal base and escapes, holds the heat of the induction heating metal member, and is effectively induction heated. Promote. It also helps prevent unnecessary heating of the refractory roofing material as a metal substrate.

  In the waterproof structure including the waterproof sheet, the waterproof sheet fixing hardware, and the metal base, as described above, the waterproof sheet fixing hardware is a non-inductive heating material composed of an induction heating metal member and a non-induction heating metal. The induction heating metal member can be provided with a heat-melting adhesive layer on the waterproof sheet bonding surface, and the non-induction heating material layer comprises the induction heating metal member and the induction heating metal base. The waterproof sheet is joined to the induction heating metal member by electromagnetic induction heating.

  When constructing a waterproof sheet on a metal base, (a) a step of preparing a waterproof sheet fixing metal as described above, wherein the waterproof sheet fixing metal is made of an induction heating metal member and a non-induction heating metal. A non-inductive heatable material layer, wherein the induction-heatable metal member is provided with a heat-melting adhesive layer on the waterproof sheet bonding surface; A step of disposing a conductive material layer between the induction-heatable metal member and the induction-heatable metal base, and (c) a step of joining the waterproof sheet to the induction-heatable metal member by electromagnetic induction heating, The construction method of a waterproof sheet provided with can be used. High frequency output is practically possible with an output of 500 W to 1500 W × 10 seconds.

  The non-inductive heatable material layer is used in combination with an induction-heatable metal member as a waterproof sheet fixing metal, and may be integrally formed. It may be constructed on the ground. In addition, the usual method is used for waterproof sheet construction by electromagnetic induction heating (Nationwide Santac waterproofing business cooperative, “PVC laminated steel sheet fusion type IH method SANTAC IB Santac IB IH fusion system PDF”, [online] , March 2007, Hayakawa Rubber Co., Ltd. [Search June 21, 2007], Internet <URL: http://www.santac.or.jp/other/main.html> etc.).

(Example 1)
Install the waterproof sheet as shown in Figs.
SPCC 0.35mm steel base (an example of a metal base), fixing bracket (one example of induction heating metal member, PVC coated steel plate) (outer diameter 80mm), and waterproof sheet (soft vinyl chloride sheet) , Thickness 1.5mm). An aluminum foil (one example of a non-inductive heating metal layer, outer diameter Φ100 mm, thickness 0.1 mm) is installed between the fixing bracket and the iron plate (Example 1, conditions in which the fixing bracket is placed on the aluminum foil) ) And without the aluminum foil (Comparative Example 1, conditions in which the fixing bracket is placed directly on the iron plate), induction heating from the waterproof sheet with a high frequency induction heating device (coil outer diameter Φ100mm) ( At a material temperature of 25 ° C, a waterproof sheet is laid on the above two products at a high frequency output of 810W x 10 seconds, induction heating is performed on the sheet, and fusion of the waterproof sheet is attempted.

(Evaluation)
In Example 1 (with aluminum foil), the fixing bracket reached the fusing temperature, the waterproof sheet and the fixing bracket could be fused, and the fused state was good. In Comparative Example 1 (no aluminum foil), the fixing metal did not reach the fusing temperature, and poor fusing was observed at that location.

  In the present invention, by installing a non-inductive heating material layer such as aluminum foil on the metal base, the induction heating to the fixed metal is concentrated, the induction heating to the metal base is suppressed, and the heating time is lengthened. And a good fusion state of the waterproof sheet can be obtained.

It is a sectional view showing an example of induction heating. FIG. 3 is a perspective view of an example metal base and an example waterproof sheet fixing hardware.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterproof sheet 2 Metal base 2A Core 2B Steel plate 3 Waterproof sheet fixed metal 3A Induction heating metal member 3B Non-induction heating material layer 4 High frequency induction heating device

Claims (6)

  A waterproof sheet fixing hardware for applying a waterproof sheet on a metal base by electromagnetic induction heating, comprising an induction heating metal member and a non-induction heating material layer composed of a non-induction heating metal. The induction heating metal member includes a heat-melting adhesive layer on a waterproof sheet bonding surface, and the non-induction heating material layer is provided between the induction heating metal member and the induction heating metal base. Waterproof sheet fixing hardware characterized by.   2. The waterproof sheet fixing metal fitting according to claim 1, wherein the non-inductive heating material layer has a larger area than the induction heating metal member.   2. The waterproof sheet fixing metal fitting according to claim 1, wherein the non-inductive heatable material layer is annular and has an outer shape larger than an outer shape of the induction-heatable metal member and an inner shape smaller than the induction-heatable metal member. The waterproof layer according to any one of claims 1 to 3, wherein the non-inductive heatable material layer is made of a non-inductive heatable material having a volume resistivity (0 ° C) of 8.0 × 10 ^-8 Ω · m or less. Sheet fixing hardware.   A waterproof structure including a waterproof sheet, a waterproof sheet fixing hardware and a metal base, wherein the waterproof sheet fixing hardware includes an induction heating metal member and a non-induction heating material layer made of a non-induction heating metal. The induction heating metal member includes a heat-melting adhesive layer on a waterproof sheet bonding surface, and the non-induction heating material layer is disposed between the induction heating metal member and the induction heating metal base. A waterproof structure, wherein the waterproof sheet is joined to the induction-heatable metal member by electromagnetic induction heating. When constructing the waterproof sheet on the metal substrate,
(a) a step of preparing a waterproof sheet fixing hardware, wherein the waterproof sheet fixing hardware comprises an induction heating metal member and a non-induction heating material layer composed of a non-induction heating metal; A step in which the induction-heatable metal member is provided with a heat-melt adhesive layer on the waterproof sheet bonding surface,
(b) disposing a non-inductive heatable material layer composed of a non-inductive heatable metal between the induction-heatable metal member and the induction-heatable metal substrate; and
(c) A method for constructing a waterproof sheet, comprising the step of joining the waterproof sheet to an induction-heatable metal member by electromagnetic induction heating.

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