JPH0631002Y2 - Waterproof sheet for flat roof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a waterproof sheet which is installed and laid in a projecting corner portion when a waterproof sheet is constructed on a flat roof in a roof waterproofing method for a building.

(Prior Art) Conventionally, a roof waterproofing method of laying a waterproof sheet on a flat roof of a building is known. At this time, in the projecting corner portion as shown in the first drawing, when there is a projecting corner b which rises vertically from the flat roof flat portion a, wall surfaces c and d orthogonal to the projecting projecting corner b.
However, it is difficult to lay a waterproof sheet along this three-dimensional shape because the shape is also orthogonal to the plane portion a.

In order to lay a waterproof sheet along such a three-dimensional shape, it is possible to form the waterproof sheet in the three-dimensional shape in advance, but for this purpose, a molding die is required and the waterproof sheet is used. There was the inconvenience of increasing the sheet production costs.

(Problems to be Solved) The present invention provides a waterproof sheet that solves the above-mentioned inconvenience, is extremely easy to manufacture, can be manufactured at low cost, and can be laid securely along the three-dimensional shape of the projected corner. To aim.

(Means for Solving the Problems) In order to achieve such an object, the present invention provides a waterproof sheet to be mounted on a projecting corner portion of a flat roof, which has a substantially trapezoidal shape.
A short side that intersects with the oblique side is formed by refracting an obtuse angle from the apex of the corner portion on the upper base side of one oblique side of the sheet to the upper base.
When a second sheet having substantially the same shape as the sheet is overlapped with the four corners corresponding to the first sheet, the first adhesive piece is provided along the position corresponding to the short side, and the position corresponding to the oblique side is further provided. A second adhesive piece is provided along the first adhesive piece, the first adhesive piece is folded back along the short side, and the second adhesive piece is folded back along the oblique side to adhere to the first sheet.

The waterproof sheet of the present invention is made of rubber or synthetic resin, and is not different from the commonly used one.

It is composed of a first sheet and a second sheet, both sheets are cut and formed, and further adhered to form a shape along the three-dimensional shape of the projected corner portion.

The first sheet has a substantially trapezoidal shape, and a short side intersecting with the hypotenuse is provided from an apex of a corner portion on the upper base side of one of the hypotenuses to form an obtuse angle with the upper base. It is preferable that the length of the short side is equal to or longer than the length of the rising corner from the flat roof flat portion.

The second sheet has substantially the same shape as the first sheet, and is basically the same except that it has an adhesive piece to be bonded to the first sheet. That is, when the corresponding four corners of the first sheet and the second sheet are aligned and overlapped, only the adhesive piece is projected from the first sheet. Therefore, both sheets can be formed by cutting a substantially rectangular sheet by arranging the hypotenuse sides at positions facing each other. The adhesive piece of the second sheet is formed along the position of the short side of the first sheet when the corresponding four corners of the second sheet are overlapped with each other.
It consists of an adhesive piece and a second adhesive piece formed along the position of the hypotenuse.

When adhering the two sheets, the corresponding four corners of the two sheets are made to coincide with each other and the respective adhesive pieces are folded back along the short side and the oblique side and adhered.

When both sheets thus bonded are spread with the adhesive as the back surface, a three-dimensional shape is formed along the projected corner.

The first sheet has a substantially trapezoidal shape as described above, but is slightly changed depending on the shape of the projecting corner portion, and the same applies to the second sheet.

(Operation) Since the present invention adopts such a configuration, the joint between the short side of the first sheet and the first adhesive piece of the second sheet rises along the rising corner, and both sides thereof further have a flat roof plane. Since it will be a shape that follows the wall surface that rises orthogonally from
A waterproof sheet can be laid along the three-dimensional shape of the projecting corner.

(Embodiment) This will be described in more detail with reference to FIGS. 2 to 5 showing an embodiment of the present invention.

First, as shown in the second illustration, the first sheet 1 and the second sheet 2
And were arranged so as to face each other, and a rectangular sheet was cut and formed. The first sheet 1 has a substantially trapezoidal shape, and a short side 6 intersecting with the oblique side 3 is formed by refracting an obtuse angle with respect to the upper bottom 4 from an apex of a corner 5 on the upper base 4 side of one oblique side 3 of the first sheet 1. did. Second
In the sheet 2, in the drawing, the portion 7 partitioned by the broken line is the first
A first adhesive piece 8 having the same shape as the sheet 1 and provided at the position of the short side 6 of the first sheet 1 and a second adhesive piece 9 provided at the position of the oblique side 3 are cut. Formed integrally.

Then, as shown in FIG. 3, the corresponding four corners of both sheets 1 and 2 are aligned and overlapped, and the first adhesive piece 8 is arranged along the short side 6 and the second adhesive piece 9 is formed along the oblique side 3. 1 sheet 1
Project from.

Then, as shown in FIG. 4, the adhesive pieces 8 and 9 are folded back to the first sheet 1 side and adhered.

When the two sheets 1 and 2 thus bonded are developed with the bonding side as the back surface, the result is as shown in FIG. 5, and the shape follows the three-dimensional shape of the projected corner portion.

(Effect) As is apparent from the above description, the present invention can be manufactured by cutting the first sheet and the second sheet and adhering them to each other, and is extremely easy to manufacture. Therefore, there is an effect of providing a tarpaulin waterproof sheet that can be manufactured at low cost and can be reliably laid along the three-dimensional shape of the projected corner portion.

[Brief description of drawings]

FIG. 1 is a perspective view showing a projecting corner portion of a flat roof, FIGS. 2 to 5 show an example of an embodiment of the present invention, and FIGS. 2 to 4 show a manufacturing process of a waterproof sheet. FIG. 5 is a plan view for explaining, and FIG. 5 is a perspective view showing a developed state of the waterproof sheet. 1 ... First sheet, 2 ... Second sheet 3 ... Oblique side, 4 ... Upper bottom 5 ... Corner, 6 ... First short side 8 ... First adhesive piece, 9 ... Second Adhesive piece

Claims (1)

[Scope of utility model registration request] 1. A waterproof sheet to be attached to a projecting corner portion of a flat roof, wherein the oblique side is bent at an obtuse angle from the apex of a corner portion on the upper base side of one oblique side of the generally first trapezoidal first sheet to the upper base. When a second sheet having a short side intersecting with the first sheet and having a substantially same shape as the first sheet is superposed with four corners corresponding to the first sheet being overlapped, a first adhesive piece is provided along a position corresponding to the short side. Is further provided, a second adhesive piece is provided along a position corresponding to the oblique side, the first adhesive piece is folded back along the short side, and the second adhesive piece is folded back along the oblique side to form the first sheet, respectively. Tarpaulin tarpaulin characterized by being bonded