JPH08105160A - Cement roof board material - Google Patents

Abstract

PURPOSE: To facilitate positioning of a cement roof board while taking advantage of the cement roof board capable of arranging both cut pieces along a corner ridge to use and while keeping strength in high degree in comparison with a notch to be provided when the whole cement roof board material is cut and divided by forming it in a roughly square shape. CONSTITUTION: A plane viewed square board body B is molded from a cement material using cement as the main ingredient, and section viewed bias cut surfaces 4 separated rated gradually from the end edge section on the rear side with the approach to the front 2 side is formed on the circumferential edge section. In such a cement roof board material, projections 1 projected within a range of thickness thereof and within a range of width of the rear are provided on the bias cut surfaces 4 and are formed as marks when execution is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to form a rectangular plate body in a plan view from a cement material containing cement as a main material, and a peripheral edge portion of the back side edge gradually becomes closer to the surface side in a sectional view. The present invention relates to a cement roofing plate material having a bias cut surface separated from the portion.

[0002]

2. Description of the Related Art Such a roofing board material is usually used to form a roof of a building as a whole by stacking a plurality of cement roofing board materials while shifting them from each other. Therefore, since a mark is required to align the cement roof plate materials that are adjacent to each other or overlap each other, as a means for forming the mark, conventionally,
As this kind of cement roofing board material, in the case of a rectangular one with a bias cut surface formed at the peripheral edge,
V-shaped notches are formed at the positions that should be used as alignment marks (for example, the center position in the width direction and the overlap position in the height direction), or the shape of the peripheral portion is formed into a substantially pentagonal shape. It was considered that some of the existing vertices were used as marks for alignment.

Further, such a cement roofing material has been cut and divided along the slope of the ridgeline to make a corner ridge.

[0004]

In the above-mentioned conventional cement roofing board material, if a notch is provided in the roofing board material, cracks or cracks easily occur from the position of the notch, and the strength is lowered, This is not preferable because water easily permeates from the notch portion. On the other hand, when the entire cement roof plate material is molded into a substantially pentagonal shape, since the cement roof plate material is molded in different shapes, when cutting the corner ridge, the cement roof material is cut, One of the two divided pieces could not be used and was just discarded. Therefore, there is a disadvantage that waste of cement material is large and it is uneconomical.

Therefore, in view of the above-mentioned drawbacks, an object of the present invention is to form the cement roofing board as a whole into a substantially rectangular shape so that both pieces are arranged along the corner ridge when cut and divided. It is an object of the present invention to provide a cement roofing sheet material that makes use of the advantages that can be utilized and yet facilitates alignment while maintaining high strength as compared with providing a notch.

[0006]

[Means for Solving the Problems] A rectangular plate member is molded from a cement material containing cement as a main material in a plan view, and a peripheral edge portion gradually becomes closer to a front surface side in a cross-sectional view. In a cement roofing sheet material having a bias cut surface spaced apart from, the characteristic configuration of the present invention for achieving the above-mentioned object is a bias cut surface, within a thickness range, and within the width range of the back surface. This is because a projecting portion is provided to form a mark at the time of construction, and the function and effect thereof are as follows.

[0007]

In other words, by forming a projecting portion on the bias cut surface of the substantially rectangular cement roofing board material, when cutting the cement roofing material when roofing the corner ridge, both cut and divided cross sections, It can be used for thatching a corner ridge, and by the bias cut surface, while giving a feeling of thickness, such as a feeling of weight, of the cement roofing board material, within the thickness range of the bias cut surface, and Since the protrusion that protrudes within the width range of the back surface is provided, the protrusion is
When roofing with roofing materials made of cement, when making a roof of a building by stacking them while shifting them from each other, use as a mark to align the roofing materials made of cement that are adjacent to or overlap each other. In addition, the strength can be increased as compared with the case where the notch is formed as a mark for alignment.

[0008]

Therefore, by forming the entire cement roofing sheet material into a substantially rectangular shape, both pieces can be disposed along the corner ridge and used when cut and divided, so that the cement roof can be discarded. It is economical because the number of plate fragments can be reduced and the cement material is not wasted.

Further, since it does not project beyond the thickness range of the bias cut surface or the width range of the back surface, the projection is produced when the cement roof plate materials are stacked or stored side by side. It is unlikely that the part will come into contact with the adjacent cement roofing board material and cause scratches, cracks, or the protruding part itself will be chipped, which will interfere with storage. There are advantages such as not becoming.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the cement roofing sheet material of the present invention is manufactured by supplying a cement material obtained by mixing cement, pulp, sand, etc. in layers, adding water, press-molding and cutting. Bias cuts are formed at the central portions of the four sides of the rectangular plate B in plan view, leaving the protruding portions 1, 1, 1, 1 (see FIG. 4).

As shown in FIGS. 2 and 3, the projecting portion 1 is formed to have the same thickness from the front surface 2 to the back surface 3 over the entire length in an aa sectional view including the apex 11 in FIG. In the bb cross-sectional view that does not include the apex 11, the surface 2
The bias cut surface 4 is formed so as to be gradually separated from the edge portion 31 on the back surface 3 side as it approaches the side.

Further, as shown in FIG. 4, the projecting portion 1 is formed in a tapered shape as it approaches the apex 11 in a plan view, and as a whole, it projects from the bias cut surface 4 in a triangular pyramid shape. It has a unique shape.

As shown in FIG. 5, the cement roofing sheet material is used for thatching the corner ridge portion of the roof, and has a shape between the roof sheet material C for the central portion of the roof and the corner ridge portion A. It is used by cutting and laying it. The remaining portion of the cut cement roof plate material is turned upside down and cut into a shape between another roof plate material C for the central part of the roof and the corner ridge portion A for reuse. As a result, the number of cement roof plate materials used can be significantly reduced and waste materials can be reduced to about one-third as compared with the case where a conventional substantially pentagonal cement roof plate material is used for the corner ridge A. Material cost and
A significant cost reduction was achieved in the transportation cost of the cement roofing board material.

[Other Embodiment] Another embodiment will be described below.
In the previous embodiment, the protrusion 1 was configured to protrude in the shape of a triangular pyramid, but the present invention is not limited to this, and the protrusion 1 is not formed in a tapered shape, and one side surface is the bias cut. It may be formed in a triangular prism shape along the surface so as to project from the bias cut surface 4 (see FIG. 6), and further, a cut in which the bias cut surface 4 and the projecting portion 1 are connected by a gently curved surface. It may have a surface.

Further, the apex 11 does not have to be on the same plane as the surface 2 in the bias cut plane in a cross sectional view, or on the end portion in a plan view.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Plan view of cement roof board

2 is a partial sectional view taken along the line aa in FIG.

FIG. 3 is a partial cross-sectional view taken along the line bb in FIG.

FIG. 4 is an enlarged perspective view of a protrusion.

[Fig. 5] A state diagram in which the roof is roofed with the cement roof plate material of Fig. 1.

FIG. 6 is an enlarged perspective view of a protrusion according to another embodiment.

[Explanation of symbols]

 B plate 1 protrusion 2 front surface 3 back surface 31 edge 4 bias cut surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Hirose 1 at 2 Takamatsu, Kosai Town, Koga District, Shiga Prefecture Kubota Shiga Factory

Claims (2)

[Claims] 1. A rectangular plate body (B) is molded from a cement material whose main component is cement, and a peripheral surface of the plate body (B) gradually becomes closer to a front surface (2) side in a cross sectional view as viewed from a back surface (3). ) Side edge part (31) is a roof plate made of cement formed with a bias cut surface (4) spaced apart from the bias cut surface (4) within the thickness range, and
A roofing material made of cement which is provided with a projecting portion (1) projecting within the width range of the back surface (3) and is formed as a mark at the time of construction. 2. The cement roofing board material according to claim 1, wherein the projecting portion (1) is formed in a tapered shape as it approaches the edge portion (31) in a plan view.