JPH07173906A - Flat seam roofing material - Google Patents

Abstract

PURPOSE:To prevent occurrence of cracks in the end part of a flat seam roofing material and reduce the weight of the material by forming a left-handed lowering part and a right-handed lowering part on the right and left ends of the upper edge of a roofing material formed by a fiber mixed-in cement plate, forming the lower edge part into a waveform, and shifting the roofing materials from each other by a half width. CONSTITUTION:A left-handed lowering part 2 and a right-handed lowering part 3 are provided on the upper edge of a flat seam roofing material 1, and projecting parts 5 and recessed parts 6 are provided on the lower edge like a waveform. The roofing materials 1 are arranged side by side to lay the first stage materials 11, 12, 13..., and the second stage materials 21, 22..., are laid thereon in such a manner as to shift from each other by a half width. Hereinafter, the third and following stage materials 31, 32, 33... are laid in such a manner as to shift internaly. The areas of the overlapping parts of the roof materials l are reduced to the minimum. Thus, the roofing 1 materials are saved so as to reduce the weight of a roof, and it is possible to prevent the occurrence of cracks due to aged deterioration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat roof material of fiber-mixed cement board.

[0002]

2. Description of the Related Art A flat sheet roofing material is a thin flat sheet of fiber-mixed cement board which is prepared by dehydrating a slurry of cement or wood fibers, punching it into a desired shape, press-molding it, curing it and curing it. When roofing this, the flat roofing materials are arranged in a row in the left-right direction by abutting the left and right side surfaces of the flat roofing material, and the flat roofing material in the upper row is covered with the lower part of the flat roofing material in the upper row. And, the flat roof members in the lower row are laterally offset and arranged in the same manner as in the lower row, and the flat roof members in the upper row are similarly arranged.

The flat roofing material disclosed in Japanese Utility Model Laid-Open No. 52-138626 has a raised roof appearance and enhances the appearance.
In order to reduce the intrusion of rainwater, the eaves side edge is formed symmetrically with respect to the center line, the concave and convex parts of the irregularity have the same width, and the left and right sides of the eaves side edge are half width. The convex part of is arranged.

In the flat roofing material disclosed in Japanese Utility Model Laid-Open No. 4-125309, in order to make the roofed appearance various designs, the end portions of the four sides are formed into uneven shapes having different shapes.

[0005]

However, in the flat roofing material as described above, since the uneven shape of the eaves side end has a right-angled or acute-angled corner, the corner of the fiber-mixed cement board is included in the corner. Cracks may occur in the curing process, or cracks may occur due to a change with time after the flat roofing material is raised. Not very durable.

[0006] Further, the flat roof material having the four side edges formed in a concavo-convex shape has a square or rectangular shape, and the ridge side has a square shape. Therefore, when it is roofed, the flat roof materials in the upper and lower rows overlap each other. Becomes wider. It wastes material and adds weight.

An object of the present invention is to solve the above conventional problems.

[0008]

Means for Solving the Problems The present invention is a flat roof material of a fiber-mixed cement board, which is prepared by dehydrating slurry of cement, wood fiber or the like by papermaking, depressurizing, curing and curing,
The flat roofing materials of each row are arranged in the left-right direction by abutting the left and right sides thereof, and the flat roofing material of the upper row is covered with the lower part of the flat roofing material of the lower row and the lower row. In the flat roofing material that is offset from the flat roofing material in the left and right direction, the left side and the right side of the ridge are formed in a downward-sloping and downward-sloping shape, respectively. It is a flat roof material characterized by being formed into a shape.

[0009]

In the present invention, the eave-side end is formed in the shape of a smooth curved wave, and there is no right-angled or acute-angled corner.
At the edge of the eaves, cracks are less likely to occur during the curing process of the fiber-mixed cement board, and cracks are less likely to occur due to changes over time after roofing of the flat roofing material.

Further, the left side and the right side on the ridge side are formed in a shape that descends to the left and to the right, respectively, and the ridge side has a substantially mountain shape. In the case of thatching, the overlapping parts of the flat roofing materials in the upper and lower rows become narrower than when the ridge side is square.

[0011]

EFFECTS OF THE INVENTION In the present invention, cracks are unlikely to occur at the eaves-side end and durability is high.

In addition, in the case of thatching, the overlapping portions of the flat roofing materials in the upper and lower rows are narrowed compared to the square or rectangular flat roofing materials, so that the material is saved and the weight is reduced.

[0013]

EXAMPLE The flat sheet roofing material 1 of this example is a thin flat sheet of fiber-mixed cement board which is obtained by paper-making and dehydrating slurry of cement or wood fiber, punching it into a desired shape, press-molding, curing and curing. .

As shown in FIG. 1, the upper part on the ridge side is about one-third on the left side and about one-third on the right side descending to the left 2
And it is formed in 3 to the right. As shown in FIG. 1, the lower left portion 2 and the lower right portion 3 each have a convex quadrant shape in the lower half to form a protrusion 4 and a concave quadrant shape in the upper half. ing.

As shown in FIGS. 1 and 2, the eave side end is
Waveforms 5 and 6 of continuous smooth curves that are not bent are formed. The convex portions 5 and the concave portions 6 of the corrugated portion are alternately arranged, the convex portion 5 is arranged at the central position, and the half width of the convex portion 5 is arranged at both left and right positions. The convex portion 5 and the concave portion 6 have an arc shape. The width a of the convex portion 5 and the width b of the concave portion 6 are the same.
The amount of protrusion of the convex portion 5 and the amount of depression of the concave portion 6 are the same.

The central portions of the left and right sides and the upper side are linear.

The flat roof material 1 has a width of 60c.
It is about m, the height is about 45 cm, and the thickness is about 6 mm.

When the flat roof material 1 is to be roofed, the flat roof material 11, as shown in FIG.
12 and 13 are arranged in a row in the left-right direction by abutting the left and right side surfaces thereof, and the flat roof members 21 and 22 in the row above are arranged.
The lower part is covered with the upper part of the flat roof material 11, 12, 13 of the lower row, and the flat roof material 11, 12, 13 of the lower row is covered.
And shift by half width to the left and right, and arrange in the same way as the lower row,
Further, the flat roof members 31, 32, 33 in the upper row are similarly arranged.

Then, the half-width convex portions 5 on both sides of the eave-side end portions of the adjacent flat roof members 11 and 12 are butted against each other. Compared with the case where the half-width concave portions 6 are arranged at both sides of the eaves-side end portions of the flat plate roof members 11 and 12, the abutting distance between the adjacent flat plate roof members 11 and 12 becomes longer. Rainwater is hard to invade.

Further, on the left and right side surfaces of the adjacent flat roof members 11 and 12 which are butted to each other, the flat roof members 21 in the upper row are provided.
Of the flat roof material 21 overlaps with the convex portion 5 at the central position of the eaves side end. Compared to the case where the recess 6 is arranged at the central position of the eaves side end of the flat roof material 21, the left and right side surfaces of the flat roof materials 11 and 12 that are abutted are covered by the flat roof material 21 in the upper row. Becomes longer. Rainwater is hard to invade.

[Brief description of drawings]

FIG. 1 is a perspective view of a flat roof material of an embodiment of the present invention.

FIG. 2 is a partial front view of the flat roof member of the same example.

FIG. 3 is a plan view showing a state in which the flat roof material of the same example is roofed.

[Explanation of symbols]

 1 Flat roof material 2 Lower left part 3 Lower right part 5 Convex part of corrugated part 6 Recessed part of corrugated part

Claims (2)

[Claims] 1. A flat roof material of fiber-mixed cement board, which is prepared by dehydrating slurry of cement, wood fiber, etc., by papermaking, pressure molding, curing, and curing, and the flat roof material of each row is provided on the left and right sides thereof. Are aligned in the left-right direction, and the flat roof material of the upper row is covered with the lower part of the flat roof material of the lower row, and the flat roof material of the lower row is offset in the left-right direction. In the flat roof material, the left side and the right side on the ridge side are formed in a downward-sloping and downward-sloping shape, respectively, and the eaves-side end is formed into a smooth curved corrugated shape. Material. 2. A flat roof material of a fiber-mixed cement board, which is prepared by dehydrating slurry of cement, wood fiber, etc., by papermaking, dehydration, pressure molding, curing and curing, and the flat roof material of each row is provided on the left and right sides thereof. Are aligned in the left-right direction, and the flat roof material of the upper row is covered with the lower part of the flat roof material of the lower row, and the flat roof material of the lower row is offset by half width in the horizontal direction. In the roofing flat roofing material, the left side and the right side of the ridge side are formed in a downward-sloping and downward-sloping shape, respectively, and the eaves-side end is formed into a smooth curved corrugated shape. The flat roof material is characterized in that the convex portion of the corrugated portion is arranged at the center position of the, and the half width of the convex portion of the corrugated portion is arranged at both left and right positions of the eaves side end portion.