JP2003343066A - Exterior facing board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inorganic exterior facing board with a new constitution capable of preventing the crack by hardening contraction of an inorganic material. <P>SOLUTION: The exterior facing board of the inorganic material (1) is so constituted that unevenness is integrally formed on the rear side (2) to give an air cycle space between projection (2a), at the same time, minute unevenness (5) is formed on the front side by corresponding to the unevenness on the rear side, the height of minute projection (5b) on the rear side is equivalent to 2 to 65% of the height of the projection on the rear side, and it is preferably equivalent to 7 to 36%. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior plate made of an inorganic material, and more particularly to an exterior plate that is preferably used when an air cycle space is provided in a wall surface of a house for air circulation.

[0002]

2. Description of the Related Art A conventional exterior plate has a back surface which is a smooth surface, and the surface thereof is provided with optional makeup such as pattern printing, colored coating, and uneven pattern.

By the way, in recent years, a construction method has been proposed in which an air cycle space for allowing air to flow in a wall surface of an outer wall structure of a house is provided. The outer wall structure in this case is a pillar,
After applying the outer wall underlaying plate and the waterproof sheet on the foundation structural material such as studs in order, the vertical furring strip or horizontal furring strip is provided so that an air cycle space that communicates in the vertical or horizontal direction on the wall surface is provided on it. Was attached, and the smooth back surface of the exterior plate was brought into close contact with the furring strip for construction.

In the construction of such an air cycle outer wall structure, there is a problem that it takes a lot of time and labor to install the exterior plate after attaching the furring strip to provide the air cycle space. In addition, since the exterior plate that is installed on the furring strip is in a state of being floated from the outer wall underlaying plate and the waterproof sheet, it is vulnerable to external impact. Therefore, the thickness of the exterior plate can be increased to increase the impact resistance. It was necessary to improve, and it was unavoidable to increase costs.

Therefore, as shown in FIG. 10, it has been proposed to provide a plurality of concave grooves C extending on the back surface of the inorganic substrate B of the exterior plate A over the entire longitudinal direction and / or the lateral direction thereof. There is. According to this prior art, when the exterior plate A is installed on the base structure material (not shown) by the groove C, the exterior plate and the base structure material are continuous over a plurality of exterior plates. Since an air cycle space is provided and the furring strips are not required, construction work is reduced, and since the exterior plate can be adhered to the underlying structural material for construction, sufficient strength against external impact is provided. To demonstrate
Since it is not necessary to thicken and reinforce the exterior plate, the cost can be reduced.

[0006]

A plurality of fine decorative grooves D extending in the same direction as the concave grooves C on the rear surface side are formed on the surface of the inorganic substrate B of the exterior plate A according to the prior art shown in FIG. Other than that, the surface is a smooth surface E, and the shapes of the front and back surfaces of the exterior plate A are significantly different. Inorganic materials such as cement have the characteristic that they gradually harden over a long period of several years, and during this time, shrinkage occurs with hardening, so the shapes of the front and back surfaces are extremely different. Then, there was a problem that a crack F was generated due to curing shrinkage (FIG. 11). The crack F is particularly caused by the inorganic substrate B.
Is thin, that is, the concave groove C on the back surface side
From the top to the smooth surface E on the surface side, or the decorative groove D
Is likely to occur on the bottom of the.

A coating film is often formed on the surface side of the exterior plate that is exposed to the outside air in the installed state for the purpose of improving performance such as waterproofness, heat-resistant spraying resistance and durability and for makeup. By increasing the strength of the surface side by the coating film and blocking the contact with the outside air, the cement hardening rate is significantly reduced and the shrinkage amount is also reduced. It tries to maintain the balance with the curing shrinkage on the side. However, even if such measures are taken, if the front and back shapes are extremely different from each other, cracking is likely to occur due to minute shrinkage.

[0008]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above problems and to provide an inorganic type exterior plate having a novel structure capable of preventing cracking due to curing shrinkage of an inorganic material.

In order to achieve this object, the present invention according to claim 1 is an exterior plate made of an inorganic material, in which concavities and convexities are integrally formed on the back surface to provide an air cycle space between the convex parts of the concavities and convexities. In addition to the above, the fine unevenness is formed on the front surface side corresponding to the unevenness on the back surface side, and the height of the fine convex portion on the front surface side is 2 to 65 times the height of the convex portion on the back surface side.
It is characterized by being set as%.

According to a second aspect, in the exterior plate according to the first aspect, the height of the concave portion on the front surface side is 7 to the height of the convex portion on the rear surface side.
It is characterized by being 36%.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of an exterior plate of the present invention will be described with reference to FIGS. 1 and 2. The exterior plate is a cement plate, a slag cement plate, a wood chip cement plate,
It is composed of an inorganic substrate 1 such as an ALC plate, a pearlite plate, a calcium silicate plate, etc., and its back surface (the surface which becomes the base structure material side during construction) has convex portions 2a, 2a ...
And concave portions 2b, 2b ... Are alternately formed to form a corrugated surface 2. When this exterior plate is constructed on the base structural material, the convex portions 2a, 2a having a predetermined height are provided.
The presence of ... provides a continuous air cycle space over the plurality of exterior plates between the exterior plates and the base structure material between the convex portions 2a, 2a.

The surface pattern of the inorganic substrate 1 is arbitrary, and a pattern pattern such as a tile pattern, a brick pattern, or a rock split pattern can be formed. In this embodiment, the concave and convex portions 2a and 2b on the back surface side are formed.
Vertical decorative grooves 3a, 3a ... Which extend in substantially the same direction (longitudinal direction) and at substantially equal intervals, and adjacent vertical decorative grooves 3a, 3
It is shown as having a tile-like pattern by the horizontal decorative grooves 3b, 3b ... Which are formed so as to extend in the orthogonal direction (shorter direction) so as to connect between a. Further, male and female seeds 4a and 4b of arbitrary shape are formed on the periphery of the inorganic substrate 1, and the exterior plates are joined in the longitudinal direction and the lateral direction through the fitting of the male and female seeds 4a and 4b. The outer wall surface is formed. In the illustrated embodiment, the male seeds 4a and the female seeds 4b are formed on the peripheral edge along the longitudinal direction of the inorganic substrate 1, but the male seeds and the female seeds are similarly formed on the peripheral edge along the lateral direction of the inorganic substrate 1. Can be formed.

The general surface of the inorganic substrate 1 is a fine uneven surface 5 having a corrugated shape in substantially the same direction as the waveform of the uneven surface 2 on the back surface side, and the uneven height is minutely formed. The positions of the concave portions 5a, 5a ... And the convex portions 5b, 5b ... Correspond to the positions of the convex portions 2a, 2a ... And the concave portions 2b, 2b. In other words, the surface of the inorganic substrate 1 is the corrugated surface 2 on the back surface side.
It is assumed that the corrugated surface 5 is in tune with.

However, the height of the convex portions 5b on the corrugated surface 5 on the front surface side of the inorganic substrate 1 (that is, the height difference between the convex portion 5b and the concave portion 5a) is the height of the convex portions 2a on the corrugated surface 2 on the back surface side. (That is, the height difference between the convex portion 2a and the concave portion 2b)
2 to 65%, and more preferably 7 to 36%.
Within the range of%. The inorganic substrate 1 is formed such that the height of the convex portion 5b on the front-side corrugated uneven surface 5 is within the above range with respect to the height of the convex portion 2a on the rear-side corrugated uneven surface 2. The balance of curing and shrinkage on the front and back surfaces of the substrate 1 is secured, and the occurrence of cracks is prevented.

From the viewpoint of the balance of curing and shrinkage on the front and back surfaces of the inorganic substrate 1, the height of the convex portion 5b on the corrugated surface 5 on the front surface side of the inorganic substrate 1 is set to the corrugated surface 2 on the back surface side.
It is preferable that the height is substantially equal to the height of the convex portion 2a in the above, but in order to secure a sufficient air cycle space when the exterior plate is constructed on the base structural material, the convex portion 2a of the back-side irregular surface 2 is sufficiently large. However, it is preferable not to visually perceive that the surface side, which is the decorative surface, is an uneven surface. The height ratio for satisfying these trade-offs is 2 to 65%, and more preferably 7 to 36%, which is proved through a large number of test examples by the present inventor. is there.

Although the manufacturing process of the exterior plate of this embodiment is not particularly limited, for example, the cross-sectional shape of the corrugated surface 5 on the front surface side is dealt with immediately after the inorganic material is extruded into a predetermined size. An upper press plate having a shape,
It can be manufactured by pressing and sandwiching it with a lower press board having a shape corresponding to the cross-sectional shape of the back-side corrugated uneven surface 2.

Further, by forming the surface of the inorganic substrate 1 into the minute corrugated uneven surface 5, the solar light hitting the surface is reflected in various directions depending on the irradiation location, and is slightly different from the case where the surface is completely flat. Different new designs can be exhibited.

Further, in the case where the surface is desired to be a completely flat surface, an embodiment in which a transparent coating 6 is formed on the fine uneven surface 5 of the inorganic substrate 1 as shown in FIGS. 1 and 2 to have a smooth surface (FIG. 3) ) Can be.

In the above-described embodiment, the corrugated irregular surface is formed by alternately forming the convex portions 2a, 2a ... And the concave portions 2b, 2b. 2 is formed, the concave-convex surface on the back surface side is not limited to this, and a convex portion having an arbitrary plane shape such as an elliptical shape, a circular shape, or an oval shape can be formed to have an arbitrary cross-sectional shape.

Several examples of the shape of the convex portion formed on the back surface of the exterior plate of the present invention are shown in FIGS. 4 to 7.
In FIG. 5, the convex portion 7 has an elliptic cylindrical shape, and in FIG. 6, the convex portion 9 has a shape extending from the elliptical base portion 9a to the small diameter elliptical tip surface 9c via the curved side surface 9b, and in FIG. 7, the small diameter oval tip surface from the oval base portion 10a to the curved side surface 10b. 1
The convex portion 10 reaches 0c.

FIG. 8 shows a state in which exterior plates 11 and 11 according to another embodiment of the present invention are joined together through the fitting of male seeds 12 and female seeds 13 formed on the peripheral edges in the longitudinal direction thereof. Is shown, and FIG. 9 is a cross-sectional view thereof. In this exterior plate 11, a substantially elliptic cylindrical convex portion 7 as shown in FIG. A plurality of rows are arranged at equal intervals with an angle of about 45 degrees with respect to the lateral direction. Such a convex portion 7 can be formed by an arbitrary method such as embossing, cutting, or coating. Reference numeral 7'indicates a defective convex portion in which a part of the convex portion 7 is defective. By forming such a defective convex portion 7'on the peripheral edge of the exterior plate 11 in the longitudinal direction / short direction, When the exterior plates 11, 11 are joined together as shown in FIG. 8, the defective projections 7 ′, 7 ′ are combined to create a complete shape as the projection 7. By providing the convex portion 7 array as shown in FIG. 8, whether the exterior plate 11 is horizontally stretched or vertically stretched, the same good ventilation performance can be obtained. be able to.

According to the embodiment as shown in FIGS. 7 to 9, the convex shape formed discontinuously on the back surface of the exterior plate gradually reduces from an arbitrary intermediate point in the longitudinal direction toward both ends. In addition, it has a substantially trapezoidal vertical cross-sectional shape and its top surface is formed to be substantially flat, and when it is a protrusion of such a shape, it is substantially constant regardless of the direction of the protrusion in the construction state. Since good air flow is ensured, the air smoothly rises between the protrusions between the exterior plate and the underlying structural material regardless of whether the exterior plate is used for vertical or horizontal lining. It is possible to exhibit good ventilation performance even under climatic conditions including no wind.

[0023]

INDUSTRIAL APPLICABILITY According to the present invention, in an exterior plate made of an inorganic material, unevenness is integrally formed on the back surface thereof to provide an air cycle space between the projections of the unevenness, and Since minute unevenness is formed on the front surface side corresponding to the unevenness and the height of the minute convex portion on the front surface side is 2 to 65% of the height of the convex portion on the rear surface side, The balance of curing shrinkage can be secured and the occurrence of cracks can be prevented.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an exterior plate according to an embodiment of the present invention.

FIG. 2 is a lateral cross-sectional view of this exterior plate.

FIG. 3 is a lateral cross-sectional view of an exterior plate according to another embodiment of the present invention.

4A and 4B are a vertical cross-sectional view (a) and a bottom view showing an example of the shape of a convex portion formed on the back surface of the exterior plate of the present invention.

5A and 5B are a vertical cross-sectional view (a) and a bottom view showing another example of the shape of the convex portion formed on the back surface of the exterior plate of the present invention.

6A and 6B are a vertical cross-sectional view (a) and a bottom view showing another example of the shape of a convex portion formed on the back surface of the exterior plate of the present invention.

7A and 7B are a vertical cross-sectional view (a) and a bottom view showing another example of the shape of the convex portion formed on the back surface of the exterior plate of the present invention.

FIG. 8 is a plan view showing a state in which two exterior plates according to still another embodiment of the present invention are joined.

9 is a sectional view taken along line XX in FIG.

FIG. 10 is a cross-sectional view showing a conventional technique in which a plurality of concave grooves extending in the longitudinal direction and / or the lateral direction of the exterior plate are provided on the back surface of the exterior plate.

FIG. 11 is a perspective view of the exterior plate of the related art and is a diagram showing a state in which a crack is generated.

[Explanation of symbols]

1 Inorganic substrate 2 Back surface wavy surface 2a convex part 2b recess 3a Vertical makeup groove 3b Horizontal makeup groove 4a male 4b female 5 Surface minute wavy surface 5a convex part 5b recess 6 Transparent coating 7 Back convex part 7'missing convex part 8 Back convex part 8a base 8b Flat tip surface 9 Backside convex part 9a base 9b curved side 9c Flat tip surface 10 Back convex part 10a base 10b curved side 10c Flat tip surface 11 Exterior plate 12 Yomi 13 female 14 Inorganic board

Continued front page    (72) Inventor Koichi Sozono             Shares 5-13-6 Asakusabashi, Taito-ku, Tokyo             Company Noda F term (reference) 2E110 AA09 AA48 AB04 AB22 BA12                       BB22 BB23 BB32 BB33 BC14                       BC15 BD23 DA03 DA23 DC08                       GA33W GB11W

Claims (2)

[Claims] 1. An exterior plate made of an inorganic material, which is constructed such that irregularities are integrally formed on the back surface thereof to provide an air cycle space between the convex portions of the irregularities, and which corresponds to the irregularities on the rear surface side. Minute unevenness is formed on the front surface side, and the height of the fine convex portion on the front surface side is 2 to 65 times the height of the convex portion on the back surface side.
An exterior plate characterized by being defined as%. 2. The exterior plate according to claim 1, wherein the height of the minute convex portion on the front surface side is 7 to 36% of the height of the convex portion on the rear surface side.