JPH08189147A - Waterproof structure - Google Patents

Abstract

PURPOSE: To prevent thermal conduction of a waterproof sheet to the substrate side when the waterproof sheet is fixed on the substrate by means of electromagnetic induction heating. CONSTITUTION: A waterproof sheet covering the whole upper face of an asphalt waterproofing layer 2a of which waterproof substrate 1 has deteriorated, are spread through conductive pieces 3. In the waterproof sheet, The thermo-welding layer is molten by heating the conductive pieces 3 by means of electromagnetic induction and the welding material is stuck to the substrate through the conductive pieces 3 and screws. On heating the conductive pieces, the thermal conduction to the substrate side is prevented by plastic boards 6. Hence, the most generated heat of the conductive pieces 3 is contributed to melting heat of the thermo-welding layer to stiffen the connection and a heat insulating layer is also molten without damage thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for waterproofing a waterproof sheet for construction or civil engineering.

[0002]

2. Description of the Related Art Conventionally, in a waterproofing work for construction work or civil engineering work, for example, waterproofing work for a flat roof, a waterproof sheet is put on a skeleton such as concrete, and the sheet is fixed on the skeleton. 4-25464
There is a technique for fixing the electromagnetic induction heating disclosed in Japanese Patent No.

This technique will be described with reference to FIGS. 1 and 3. As shown in FIG. 1, first, a waterproof base (upper surface of the body) is provided.
1 is provided with a conductor piece 3 at a required position.
As shown in, it is fixed to the base 1 with screws such as anchors 4.

Next, the waterproof sheet 2 is placed on the base 1, and as shown in FIG. 4, the conductor pieces 3 are heated on each conductor piece 3 by electromagnetic induction by a welding tool, and this heat generation causes thermal welding. The agent layer 5 is melted to bond the waterproof sheet 2 to the conductor piece 3, and the conductor sheet 3 and the anchor 4 are fixed to the base 1.

[0005]

In fixing the waterproof sheet 2 by electromagnetic induction heating, conventionally, the conductor piece 3 is directly screwed to the upper surface of the base 1 as shown in FIG. For this reason, the heat generated by the conductor piece 3 escapes to the underlayer 1 and a sufficient amount of heat cannot be secured, and the waterproof sheet 2 may not be sufficiently joined to the conductor piece 3. If this bond is not enough,
The waterproof sheet 2 is raised, which is not preferable.

Further, as shown in FIG. 12, in a heat insulating structure in which a heat insulating layer 8 is formed on an upper surface of a base 1 and a waterproof sheet 2 is put on the heat insulating layer 8, the heat insulating layer 8 is usually urethane foam. Since the conductor piece 3 is made of heat-sensitive material such as styrene foam, it is melted by the heat generated by the conductor piece 3, and the conductor piece 3 digs into the heat insulating layer 8 as shown in FIGS.
However, it becomes like a chain line, and eventually the screw part may break like a solid line. If the waterproof sheet 2 is torn, it will be useless. This phenomenon occurs when there is a heat-sensitive layer such as a urethane coating film between the base 1 and the waterproof sheet 2 in addition to the heat insulating layer 8.

Under the above circumstances, it is an object of the present invention to ensure a sufficient amount of heat and not melt a heat insulating layer or the like.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a conductor piece having a heat-welding material layer on its upper surface is screwed to a required position of a waterproof base, and the entire surface of the base is covered with a screw. A waterproof sheet covering the entire surface is stretched with the conductor piece interposed, and the heat-welding material layer is melted by heating the conductor piece by electromagnetic induction from above the waterproof sheet, and the waterproof sheet is bonded to the conductor piece. In the above-mentioned known waterproof structure, the heat insulating layer is formed on the entire lower surface of the conductor piece.

In this structure, the heat insulating layer may be a long heat insulating plate, and the conductor piece may be provided on the upper surface of the heat insulating plate. At this time, the conductor piece may be movable in the length direction of the heat insulating plate.

The conductor piece may have the heat-welding material layer formed on the upper surface and the heat insulating layer on the lower surface, or the heat-welding material layer formed on the upper and lower surfaces thereof.

[0011]

In the waterproof structure according to the present invention thus constructed, heat conduction to the base side is blocked by the heat insulating layer when the conductor piece is heated by electromagnetic induction. Therefore, most of the heat generated by the conductor pieces contributes to the melting of the heat-welding material layer.

[0012]

[Effect] The present invention is constructed as described above, and exhibits the following effects by the above operations.

Since the heat of induction heating is not transmitted to the base side, the waterproof sheet can be firmly adhered to the conductor piece, and even if the base side has a heat-meltable heat insulating layer, the heat insulating layer is not There is no risk of melting and damage.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment is shown in FIGS. 1 to 4, and this embodiment relates to repair of waterproofing from a flat roof floor surface 1 to a rising portion 1a. As shown in FIG. 1a
The Alfalto waterproof layer 2a is formed on the upper surface, and the waterproof layer 2a is deteriorated.

First, as shown in FIG. 1, the conductor pieces 3 are fixed to the required positions on the surfaces of the bases 1 and 1a with anchor nails 4, respectively. As shown in FIG. 1 and FIG. 2, the conductor piece 3 is a thermoplastic synthetic resin 5 which exhibits adhesiveness by melting polyester resin or the like on the surface of a stainless plate having a width of 50 mm and a length of 90 to 100 mm, for example. Is coated by a hot melt method or the like. Further, this conductor piece 3 can be freely fitted into a long plate 6 such as PVC resin.
Is an easy-to-carry one, for example, about 1 to 2 m is appropriately arranged on the upper surface of the base 1, the conductor piece 3 is fitted to a required position of the long object 6 and the conductor piece 3 is fixed by the anchor nail 4.
The bases 1 and 1a are fixed. At this time, a heat resistant insulating sheet 7 may be laid on the entire surface of the waterproof layer 2a.

A corner portion from the floor surface 1 to the rising portion 1a has an elongated object 6 and a conductor piece 3 having an L-shaped cross section which conforms to their shapes. As shown in FIG. 1, the conductor pieces 3 are arranged in the vicinity of the rising portion 1a (peripheral portion) in a large amount and in the other portions less than that.

On the other hand, in advance, in a factory or in the field, a roll-shaped PVC sheet having a required width is joined at its side edges to form a waterproof sheet 2 having the same shape as the upper surfaces of the bases 1 and 1a, and the conductor piece 3 is attached. The waterproof sheet 2 is placed on the bases 1 and 1a and finely adjusted by sufficient positioning and cutting, and a welding tool is applied from the waterproof sheet 2 onto each conductor piece 3. An induction coil is provided inside the welding tool, and the induction coil is excited by an alternating current, and an eddy current is generated in the conductor piece 3 by the electromagnetic induction action of the generated magnetic field. Therefore, the conductor piece 3 generates heat due to eddy current loss, the adhesive resin 5 on the upper surface is melted, and the waterproof sheet 2 is bonded.

When the waterproof sheet 2 is melt-bonded, the synthetic resin elongated plate 6 prevents the heat generation of the conductor piece 3 from being conducted to the bases 1 and 1a. At this time, if a layer of the synthetic resin 5 is also formed on the back surface of the conductor piece 3, the adhesive piece 3 is firmly joined to the long plate 6 by melting the layer 5.

The conductor pieces 3 can be formed in an appropriate shape as shown in FIGS. 5 and 6, and they can be moved in the longitudinal direction of the elongated plate 6. In addition, as shown in FIGS. 7 and 8, the conductor piece 3 may be embedded in the long plate 6 or may have a structure in which it can be fitted. If the fitting is possible, the pitch t between the conductor pieces 3 shown in FIG. 1 can be made appropriate by appropriately selecting the fitting position. In the case of fitting, a layer of synthetic resin 5 may be formed on the front and back surfaces of the conductor piece 3, and the conductor piece 3 may be fixed to the long plate 6 by melting the synthetic resin layer 5.

In the embodiment shown in FIGS. 9 and 10, the heat insulating layer of the conductor piece 3 is composed of a synthetic resin plate 6a having the same shape, and the plastic synthetic resin layer 5 is formed on the front and back surfaces of the conductor piece 3. Are formed. As shown in FIG. 10, the conductor piece 3 is fixed to the base 1 by the anchor nails 4 with the synthetic resin plate 6a interposed therebetween, and the waterproof sheet 2 is heat-welded in the same manner as described above. At this time, the conductor piece 3 is joined to the synthetic resin plate 6a by the synthetic resin 5. If a heat-resistant synthetic resin is used instead of the synthetic resin 5 on the back surface of the conductor piece 3, this resin layer performs a heat insulating action.

In the embodiment shown in FIG. 11, a heat insulating layer 8 such as urethane foam resin is formed on the surface of the waterproof substrate 1.
In this embodiment, a cylindrical portion 6b is formed in the center of the synthetic resin plate 6a in the embodiment of FIG. Stick to. A heat insulating material 8a is packed in the cylindrical portion 6b. Also in this case, the synthetic resin plate (layer) 6a
May be integrally formed on the lower surface of the conductor piece 3 or may be a long plate.

When the heat-welding layer 5 is formed on the back surface of the conductor piece 3, after fixing the heat insulating plates 6 and 6a to the bases 1 and 8, the conductor piece 3 is thermally insulated at the same time as the waterproof sheet 2 is bonded. It can be fixed to the insulating plates 6 and 6a. Therefore, it is not necessary to form the holes for the screws 4 in the conductor piece 3.

[Brief description of drawings]

FIG. 1 is a partially removed perspective view of an embodiment.

FIG. 2 is a perspective view of a main part of the embodiment.

FIG. 3 is a sectional view of a main part of the same embodiment.

FIG. 4 is a sectional view of a main part of the same embodiment.

FIG. 5 shows another embodiment, in which a is a perspective view of a main part and b is a sectional view of the same.

FIG. 6 is a sectional view of a main part of another embodiment.

FIG. 7 is a perspective view of a main part of another embodiment.

FIG. 8 is a perspective view of a main part of another embodiment.

FIG. 9 is a perspective view of a main part of another embodiment.

FIG. 10 is a sectional view of the main part of the embodiment.

FIG. 11 is a cross-sectional view of main parts of another embodiment.

FIG. 12 is an operation explanatory view of a conventional example.

[Explanation of symbols]

 1, 1a Waterproofing base 2 Waterproofing sheet 2a Asphalt waterproofing layer 3 Conductor piece 4 Anchor (screw) 5 Heat-welding material layer (adhesive resin) 6, 6a Synthetic resin plate (heat-resistant insulating plate) 7 Heat-resistant insulating sheet 8 Foam urethane insulation layer

Claims (5)

[Claims] 1. A waterproof sheet 2 covering the entire surface of the underlayer 1 with screws 4 and 4b of conductor pieces 3 having a heat-welding material layer 5 on the upper surface of the waterproof underlayer 1, 1a. Are stretched with the conductor piece 3 interposed therebetween, and the heat-welding material layer 5
Is melted by heating the conductor piece 3 due to electromagnetic induction from above the waterproof sheet 2, and the waterproof sheet 2 is covered with the conductor piece 3
A water-proof structure adhered to, characterized in that the heat insulating layers 6, 6a are formed on the entire lower surface of the conductor piece 3. 2. The waterproof structure according to claim 1, wherein the heat insulating layer comprises a long heat insulating plate 6, and the conductor piece 3 is provided on the upper surface of the heat insulating plate 6. 3. The conductor piece 3 is movable in the length direction of the heat insulating plate 6.
Waterproof structure described. 4. The conductor piece 3 used in the waterproof structure according to claim 1, wherein the heat-welding material layer 5 is formed on an upper surface of the conductor piece 3 and heat insulating layers 6 and 6a are formed on a lower surface thereof. thing. 5. The conductor piece 3 used in the waterproof structure according to claim 3, wherein the heat-welding material layer 5 is formed on the upper and lower surfaces thereof.