This is a nationalization of PCT/JP05/008463 filed Apr. 27, 2005 and published in Japanese.
The present invention relates to a board for building material, a method of producing the board and a method of installing the board, and more specifically, to such a board which has a number of perforations formed on its surface visually in a uniform and regular arrangement, a method of producing such a board, and a method of installing such a board.
Boards for building material, such as gypsum boards and calcium silicate boards, are practically and widely used as architectural interior finish materials. In general, these kinds of boards are secured to interior finish base materials to be finished, such as light-weight steel base members or base boards, with use of fixing elements such as screws or nails (referred to as “fixing elements” hereinafter), or with use of adhesives and the fixing elements. The fixing elements are screwed or driven to the board so that exposed parts of the fixing elements are flush with surfaces or slightly sunk below the surfaces, whereby the fixing elements are tightly fixed to the base materials. On the surfaces of the boards, there are irregularities or dents locally formed around the exposed parts of the screwed or driven fixing elements, or cross recesses of the screw heads or the like for engagement with a rotating tool such as a screwdriver. Therefore, putty finishing is carried out for such exposed parts, before painting, wallpapering and so forth.
A construction method in consideration of such putty finishing can be assumed, wherein recesses, grooves or the like for the putty are preformed in screwing or driving positions of the fixing elements. For instance, circular recesses having a diameter slightly larger than that of a profile of the screw head are preformed in the screwing positions, and the putty is filled thereinto after the screws are driven to centers of the recesses, whereby the screw heads in the recesses are embedded in the putty. As a technique similar to this method, it is disclosed in Japanese patent application laid-open publication No. 55-138556 (JP No. 55-138556) that a board for building material has regular grooves corresponding to tile joints and exhibits a tile joint pattern. This board is secured to a base material by hammering nails into the bottom of the groove. The groove is filled with white cement. Heads of the nails are embedded in the solidified white cement, so that the heads are visually concealed from an interior space of a room.
Further, a board for building material preliminarily provided with an interior finish material on its surface, such as a decorated gypsum board or decorated calcium silicate board, is known. As regards this kind of board, it is unnecessary to execute painting, wallpapering or the like for the surface of the board. Therefore, an interior finish surface can be formed in an interior side by merely fixing the board to a ceiling or a wall. When such a decorated board is secured to a base material by screws, a measure is normally taken for irregularities or unevenness of the surface of the board caused by screw heads, exposure of the screw heads, or the like. For example, putty finishing for the screw heads or a specific painting for the screw heads is carried out, or specific screws are used.
A method for allowing the screw heads to be visually inconspicuous without such a treatment for the screw heads is disclosed in Japanese patent application laid-open publication No. 2003-154514 (JP No. 2003-154514), in which an irregular pattern is preformed on a surface of the board. This kind of method might be able to be used for a decorated ceiling board or the like having an irregular pattern, such as a vermicular pattern. However, such a method cannot be employed with respect to a board for building material having a uniform and regular formation of patterns, undulations or apertures.
Furthermore, a perforated board for building material having many through-holes of a small diameter or small dimensions is known. The perforated board is mainly intended for prevention of an echo, or control of a sound absorption performance or an acoustic reverberation time. The perforated board is a plate-like member having an appropriate open area ratio. In general, a layer of air, or a layer packed with a sound absorbing material such as a glass wool is provided behind the plate-like member; or otherwise, a sheet such as a sheet of paper is overlaid on a reverse face of the plate-like member. If required, an interior finish work such as painting or wallpapering is provided in a plant or a construction site with respect to a face of the perforated board on its interior side. It is disclosed in Japanese patent application laid-open publication No. 2000-504797 (JP No. 2000-504797, which corresponds to PCT pamphlet of PCT international application No. WO97/29254, that a part of through-holes of such a perforated board is formed to be fissure-like perforations which do not extend through the board.
In general, a number of through-holes are disposed in the perforated board mainly intended for acoustic control or sound absorption, and the through-holes exhibit a variety of patterns or shadows over the whole surface. However, the fixing element such as a board fixing screw cannot be driven or screwed in the through-hole. Usually, the perforated board is partially provided with non-perforated zones to which the fixing elements can be driven or screwed. For example, this kind of non-perforated zone is formed in a periphery of the board, or it is provided in a form of zone traversing the board.
However, if such a non-perforated zone is formed on the board, the number of through-holes and the locations of through-holes, or their regularity, uniformity and architectural design are restricted by forming the non-perforated zones. In addition, putty finishing and/or painting for concealing an exposed part of the fixing element has to be executed.
For architectural appearance of the exposed part of the fixing element, it might be possible to employ the method of preforming recesses, grooves or the like for putty finishing, as disclosed in JP 55-138556 as set forth above. According to such a method, however, drying shrinkage of the putty, aged deterioration of the putty and so forth may occur, which result in a condition that the recesses or grooves themselves are conspicuous.
On the other hand, the method of preforming irregular patterns on the board as disclosed in JP Nos. 2003-154514 and 2000-504797 as set forth above (i.e., method for allowing existence of the fixing element to be inconspicuous by irregular pattern or the like) cannot be employed for a perforated board having a regular or uniform thorough-holes.
Further, since the perforated board is mainly used for improving an acoustic performance of a room, it is desired in many cases that a certain area is entirely finished by the perforated boards. However, in some cases, it is not desired that the whole finished area has the sound absorption performance, owing to a purpose or structure of the room. For example, in some cases, it is desired that the perforated board is located only in a part effective in improvement of the acoustic performance, and that non-perforated boards are located in a part in which the sound absorption effect is unnecessary or in which an acoustic reflection is required. However, impairment of uniformity or unity of architectural design results from mixed use of the perforated boards and the non-perforated boards. This may lead to an unnatural impression or a sense of incompatibility, which often results in difficulty of interior design. Therefore, in practice, the finished area, such as a ceiling, is entirely finished by the perforated boards, regardless of whether the sound absorption performance is required.
It is an object of the present invention to provide a board for building material and a method of producing the board, which can ensure a region for screwing or driving a fixing element without impairing the regularity, uniformity or architectural design of the perforations, and which can improve workability of construction by omitting putty finishing or the like for an exposed part of the fixing element.
It is another object of the present invention to provide a construction method or execution method of the board for building, which enables arbitrary setting of a sound absorption effect and an acoustic reverberation effect of an interior finish surface, without impairing uniformity or unity of architectural design of the interior finish surface.
To attain the aforementioned object, the present invention provides a board for building material which has perforations disposed on a surface of the board, the perforations being constituted from a number of recesses, or a number of recesses and through-holes, wherein all or a part of the recesses are positioned in an area of the board in which fixing elements are to be screwed or driven, and wherein a bottom face of the recess constitutes a face for screwing or driving the fixing element thereto, and a color of the bottom face is set to have a brightness of color decreased in comparison with a color of the surface of the board.
According to the present invention, the recesses are disposed in the region for securing the board to a base material by means of the fixing element, whereby the board can be formed with portions (the recesses) secured by the fixing element. The color of the bottom face of the recess is set to have the brightness of color decreased in comparison with the color of the surface of the board. It is difficult to visually distinguish the recess from the through-hole, as viewed from the interior of the room, and therefore, the recess and the through-hole give a resident or the like a visually equal impression. That is, the portions for screwing or driving the fixing elements are formed by the recesses which are visually recognized as the through-holes, and therefore, regularity, uniformity or architectural design of the perforations is not restricted by provision of the screwing or driving regions.
The present invention also provides a board for building material which has perforations disposed on a surface of the board, the perforations being constituted from a number of recesses, or a number of recesses and through-holes, wherein the perforations are regularly or uniformly disposed on the surface of the board and wherein a color of a bottom face of the recess is set to have a brightness of color decreased in comparison with a color of the surface of the board.
According to such an arrangement of the present invention, it is difficult to visually distinguish the recess from the through-hole, as viewed from an interior of a room, and therefore, the recess and the through-hole gives a visually equal impression to a resident or the like. The regularity, uniformity or architectural design of the perforations is not restricted by forming the recesses (or it is not restricted by replacing a part or all of the through-holes with the recesses). Further, an exposed part of the fixing element can be positioned on the bottom face, which is set to have the decreased brightness of color in comparison with the color of the surface of the board and dented from the surface of the board. It is difficult for the resident to be visually conscious of such an exposed part of the fixing element. Therefore, it is possible to omit the putty finishing or the like for the exposed part of the fixing element.
Thus, according to the board of the present invention, the region for screwing or driving the fixing element can be ensured without impairment of the regularity, uniformity or architectural design of the perforations, and workability can be improved by omission of putty finishing or the like for the exposed part of the fixing element, or omission of painting, wallpapering or the like for the surface of the board.
If desired, the fixing element is provided with the exposed part having substantially the same color as that of the bottom face, or the exposed part is coated with a paint having substantially the same color as that of the bottom face. Preferably, the surface of the exposed part is formed with minute undulations or indentations for diffusely reflecting light. For example, the exposed part formed with such minute undulations or indentations is coated with a paint having substantially the same color as that of the bottom face. Alternatively, a relatively thick coat of paint is applied to the exposed part so that minute undulations or indentations are formed thereon by the coat. According to these arrangements, the exposed part is prevented form being visually conspicuous by natural or artificial light entering the recess in a certain direction. In other words, the exposed part can be further inconspicuous by such simple means, and this allows the resident or the like to be entirely unaware of the fixing element.
Preferably, the aforementioned recesses are disposed in the area of the board to which the fixing element should be screwed or driven, and the bottom face of the recess forms a face for screwing or driving the fixing element thereto.
Further, the present invention provides a board for building material having the aforementioned arrangement, wherein a sound absorption of the board is established by control of a ratio of the recesses and the through-holes.
Such an arrangement of the present invention enables arbitrary setting of the sound absorption effect and the acoustic reverberation effect of the interior finish surface of the board. That is, the through-hole increases the sound absorption performance of the board whereas the recess decreases the sound absorption performance thereof. Therefore, arbitrary setting of the sound absorption performance of the board can be carried out by control of the ratio of the recesses and the through-holes. In addition, change of the ratio of the recesses and the through-holes does not impair the regularity, uniformity or architectural design of the perforations. Such a control of the ratio may be performed by setting of an opening area ratio or setting of a quantity ratio of the recesses and the through-holes.
All of the perforations of the board can be formed by the recesses in accordance with the present invention. Such a board can be used as an acoustically non-absorptive perforated board, differently from the acoustically absorptive perforated board with the perforations of the through-holes. The acoustically non-absorptive perforated board gives the resident and so forth an impression visually equivalent to that of the acoustically absorptive perforated board. The viewer does not have a sense of incongruity even if the non-absorptive board is provided adjacent to the absorptive board on a finished surface. That is, in the eyes of the resident, the non-absorptive board is indistinguishable from the adjacent absorptive board. Therefore, it is possible to provide the absorptive board in only a part of the finished area, without impairing uniformity or unity of architectural design of the interior finish surface.
Further, the layout of the recesses on the acoustically absorptive board is preferably set to be in accord with the distance between base members (ceiling joists or the like) spaced at regular intervals. On the other hand, in an actual construction site, it is necessary to cut the boards into pieces for dimensional adjustment in a peripheral zone near the wall; or it is necessary to provide openings and their reinforcement structures for building equipment, such as air outlets, air-conditioners or lighting fixtures. The board with only the perforations of the aforementioned recesses (i.e., the acoustically non-absorptive board) can be preferably disposed in such a part. For example, in a case where the ceiling is generally constructed by the boards with the recesses only in positions for the fixing elements and the through-holes in the other area (i.e., the acoustically absorptive boards), the non-absorptive boards can be exceptionally secured only to a peripheral zone near the wall and a part surrounding the openings for building equipment. Even if the non-absorptive boards are provided in such a manner, uniformity or unity of architectural design of the ceiling surface is not impaired, and advantage of workability, such as omission of putty finishing or the like, can be still obtained.
From another aspect, the present invention provides a method of producing the aforementioned perforated board, wherein a flat pressing face of a male die is pressed against a surface of a board for building material so that a recess having a predetermined depth is formed thereon and a bottom face of the recess is formed for screwing or driving a fixing element thereto.
According to such a method, the board of the present invention can be efficiently produced.
It is preferred that a guide plate with a guide hole and an abutment face is used. The male die can be inserted into the guide hole and the abutment face can abut against the surface of the board. The pressing face of the male die is pressed against the surface of the board in a state that the abutment face is in contact with the surface of the board.
More preferably, there is provided a penetrating member, which has a profile substantially conforming to an outline of the recess and which transitionally penetrates the surface of the board for facilitating deformation of the surface. A projection, blade or scoring member can be preferably used as such a penetrating member. The penetrating member forms bending means, such as a groove, a V-shaped cut, a folding line or dots, on the surface of the board.
From still another aspect, the present invention provides a method of installing the board for building material, comprising a step of; installing on an interior surface, the first board which is improved in its sound absorption performance by controlling a ratio of the recess and the through-hole as set forth above, and the second board which is reduced in its sound absorption performance by controlling the ratio of the recess and the through-hole, thereby setting a sound absorption effect and an acoustic reverberation effect of a room.
According to such a method, it is possible to arbitrarily set the sound absorption effect and the acoustic reverberation effect of the interior finish surface, without impairing uniformity or unity of architectural design of the interior finish surface.
The board (second board) reduced in its sound absorption performance includes a board which does not have any through-hole but has only the recesses.
In a preferred embodiment of the present invention, the bottom face has an index for positioning a tip of the fixing element. Such an index is used as a mark for allowing the worker to recognize the position for securing the board. Preferably, this positioning index is made by print, application of paint, denting or the like. It is preferred that the index is a dent or aperture positioned at a center of the bottom face of the recess, into which the tip of the fixing element can be inserted. According to such an arrangement, the fixing element can be centered in the recess by the index and the fixing element can be accurately screwed or driven into the board by guidance of the index.
In an embodiment of the present invention, a number of perforations uniform in size and shape are formed on the surface of the board by the through-holes and the recesses. In another embodiment, the dimensions of the through-hole and the recesses are set to be in accord with a pattern of the perforations on the board surface. For example, if the pattern is such that the size of perforation stepwisely or gradually varies, appropriate setting of the size of the through-hole and recess is made in accordance with a rule of the pattern. In such embodiments, each of the cross-sectional shapes of the through-hole and the recess can be an arbitrary shape, e.g., a polygon such as a triangle, square or pentagon, or a circle.
Preferably, a substrate of the board is a gypsum board and the bottom face of the recess is formed by a liner paper for gypsum board. The recess is stamped on the surface of the board by unheated compression-forming for locally compressing the substrate, such as press-forming. The bottom face and the side face in the recess are covered with the liner paper. Preferably, the depth of the recess from the surface of the board is determined, taking into consideration of a visual effect of the recess, as well as reduction of strength, breakage under tension, sharing, damage or deterioration of the liner paper which may occur on the periphery of the recess during press-forming. For example, it is desirable to increase the depth of recess to provide an equal visual effect of the recess and the through-hole. However, during screwing or driving the fixing element, the liner paper of the bottom face is apt to be separated and released therefrom by a reaction force of the screwed or driven fixing element. On the other hand, if the depth of recess is decreased, it may be possible to avoid such a condition. However, a problem is caused in which the recess and the through-hole give different visual effects to the observers, or paint deposits on the bottom face of the recess during painting of the surface of the board. For this reason, the depth of the recess is set to be, preferably, in a range from 0.1 mm to 2.0 mm, more preferably, in a range from 0.3 mm to 1.0 mm. It is preferred that the liner paper is colored beforehand in the aforementioned color of the bottom face, or a coat of paint having the aforementioned color of the bottom face is applied to the bottom face and the exposed part of the fixing element.
In a case where the recess is stamped by press-forming or the like, it is preferred to consider reduction of strength, breakage under tension, sharing, damage or deterioration of the liner paper which may occur on the periphery of the recess during press-forming, as well as breakage of the liner paper which may be caused by the force acting on the liner paper when the fixing element is screwed or driven to the board. As an example of concrete countermeasures, the basis weight (weight per unit area) of the liner paper is set to be in a range from 150 g/m2 to 250 g/m2, preferably, equal to or greater than 200 g/m2. As another example of the countermeasures, a chemical effecting adhesiveness between the core and the liner paper is added in a process of manufacturing a gypsum board, whereby the defect occurring during press-forming as set forth above is eliminated.
There is a range of the specific gravity of the gypsum board appropriate to the depth of the recess. If the specific gravity is not in such a range, exfoliation of the liner paper is apt to be caused by destruction of the core during compression. In consideration of such exfoliation, the specific gravity of the core is set to be in a range from 0.5 to 1.0, preferably in a range from 0.7 to 0.9. In general, natural gypsum, chemical gypsum and recycled gypsum are used as raw materials of gypsum board. It is desired that the ratio of recycled gypsum is reduced.
It is desired that reinforcement material such as grass fibers are added to a core in a process of manufacturing a gypsum board, so as to prevent reduction of strength and fire resistance of the gypsum board owing to creation of the perforations. When the board is provided on the ceiling, the grass fibers also act to prevent deflection of the board. Further, it is desired that boric acid or the like is added to the material of the core for preventing the deflection.
Preferably, a sheet such as a sheet of paper or a resin sheet is laid over the through-hole on the reverse face side of the board. Such a sheet overlaid on the reverse face side enables to prevent a flame from acting on the reverse face of the board through the hole. Particularly, in consideration of the fire resistance, an incombustible sheet including glass fibers and an inorganic matter is preferably used as the aforementioned sheet. Calcium carbonate, calcium silicate, aluminum hydroxide, sepiolite, zeolite and so forth can be exemplified as the inorganic matter.
In another embodiment of the present invention, a covering layer having a predetermined thickness is overlaid on a right face of the substrate of the board, except the perforation. The bottom face of the recess is formed by the surface of the substrate, and the side face of the recess is formed by an edge of the covering layer. Preferably, the covering layer is formed by a relatively thick coat of paint or coating material on a right face of the substrate. According to such an arrangement, a recess can be formed at an uncovered part, and the depth of the recess is set to be the thickness of the covering layer. The thickness of the layer is set to be, preferably, in a range from 0.1 mm to 2.0 mm, more preferably, in a range from 0.3 mm to 1.0 mm.
With reference to the attached drawings, preferred embodiments of the present invention are described hereinafter.
A perforated board for building material 1 comprises a substrate, which is a gypsum board of a predetermined thickness T (e.g., thickness T=9.5 mm) having a gypsum core 10 covered with sheets of gypsum board liner paper 11 on its both faces. The board 1 has a rectangular profile of a predetermined size W×L (e.g., 455 mm×910 mm) as seen in the front elevational view. A sheet of backing paper 15 is overlaid on a reverse face of the board 1. The sheet 15 is adhered to the reverse face of the gypsum board by an adhesive. A sheet of material including glass fibers and an inorganic substance can be preferably used as the sheet 15.
The board 1 is formed with a number of bored square through-holes 12. Each of the holes 12 illustrated as black squares in
In
As shown in
As shown in
The sheet 11 on a right face side of the board 1 is colored beforehand in a hue, a brightness and a saturation of color such that the recess 13 and the through-hole 12 give an equal visual impression to a viewer (a resident and so forth in a room). A finish coat of paint is applied to the sheet 11 so that a paint film 18 is provided thereon. The paint film 18 is formed on an overall surface of the board except the openings of the holes 12 and the recesses 13, so that an interior finish surface exposed to the interior space is formed. Although the sheet 11 is exposed on the bottom face 16 and the side faces 17 of the recess 13, the sheet 11 colored as set forth above gives to the resident in the room, a visual impression equal to that of the through-holes 12, in relation to the color of the paint film 18 and the depth D of the recess 13.
A coat of paint different from the interior finish coat of paint may be applied to the sheet 11 in the recess 13. In such a case, a paint of a hue, a brightness and a saturation of color, which give the resident a visual impression equivalent to that of the hole 12, is selected as a paint to be applied in the recess 13. Preferably, a head of a screw exposed to the interior space is also coated with a paint having a hue, a brightness and a saturation of color which provide a visual impression equal to that of the bottom face 16 and the side faces 17 of the recess 13.
As the recess 13 forms a simulative through-hole which takes a visual effect equivalent to that of the through-hole 12 in the non-perforated zone S, the board 1 is visually recognized as a perforated board which has through-holes regularly and uniformly arranged over the whole area of the board.
The recesses 13 in predetermined positions are formed with positional indexes 19 for board fixing screws. Each of the indexes 19 is a small dent which is stamped at a center of the bottom face 16 as shown in
As shown in
The board 1 is secured to the base material 60, such as a ceiling joist, in a condition that the screw head 71 is contained in the recess 13 as shown in
The substrate W is a gypsum board of a predetermined thickness T (e.g., thickness T=9.5 mm) which has a gypsum core 10 covered with sheets of the gypsum board liner paper 11 on its both faces. A male die 30 is used in the process as shown in
The process as shown in
The substrate W thus formed with the recess 13 is finished by painting with use of a painting or coating device, such as roll coater. According to experiments of the present inventor, if the depth D (
In the process as shown in
Preferably, the device for forming the recess as illustrated in
In
Similarly to the board 1, the board 2 is provided with the recesses 13 in an area for securing the board to the interior finish base material with use of the board fixing screws. The size G×G and the depth D of the recess 13 are set to be the same as those of the recess 13 of the board 1.
The board 2 differs from the aforementioned board 1 in that the board 2 is not provided with the through-hole 12 at all, and that the recesses 13 are formed in positions where the through-holes 12 in the aforementioned board 1 (
The sheet 11 positioned on the right face side of the board 2 is colored beforehand in a hue, a brightness and a saturation of color so as to provide a visual impression equivalent to the through-hole 12 of the board 1 (
A coat of paint different from the paint for the interior finish surface may be applied to the sheet 11 in the recess 13, similarly to the recess 13 of the board 1. In such a case, the sheet 11 in the recess 13 is painted by a paint having a hue, a brightness and a saturation of color which provide a visual impression equivalent to that of the through-hole 12 (
It is preferred that the recesses 13 in predetermined positions are provided with the positional indexes for the board fixing screws (not shown), similarly to the aforementioned embodiment.
As illustrated in
A steel ceiling furring structure 6 is constructed by light-weight steel ceiling joists 61, support members for the joists 62, hangers 63 and hanging bolts 64. The boards 1, 2 are secured to the joists 61 by the board fixing screws (not shown). As shown in
The boards 1, 2 adjacent to each other give visually equivalent impression to the resident or the like, and the ceiling looks as if regularly arranged through-holes are distributed over the whole area of the ceiling. Accordingly, the boards 1, 2 can be provided in a mixed condition, without impairing uniformity or unity of architectural design of the interior finish surface.
In
In
The ceiling as shown in
Alternatively, decorative gypsum boards (e.g., “Gyptone” or “Marbletone” manufactured by Yoshino Gypsum Co., Ltd.) may be positioned in the vicinity of the wall surface 81 or in the zones for installing the building equipment 82, 83, 84.
In
However, according to the boards 1, 2 having an arrangement as set forth above, as shown in
In
The sheet 11 positioned on the right face side is colored in a hue, a brightness and a saturation of color to give the resident or the like, a visual impression equivalent to the through-hole 12, whereby the recesses 13 and the through-holes 12 give the resident or the like, a visually equivalent impression. A resin paint, resin coating material and so forth for creating a relatively thick layer 20 is applied to the sheet 11, except for the holes 12 and the recesses 13. The thickness of the layer 20 is set to be in a range of 0.1-2.0 mm, preferably, in a range of 0.4-1.0 mm. Openings of the hole 12 and the recess 13 are set to have the uniform size (G×G). The dimension G is preferably set to be at least 8 mm, in consideration of the size of the fixing element and so forth.
The edges of the sheets 11, the edge 10a of the core 10 and an edge of the layer 20 are exposed in the holes 12, and the visual impression of the holes 12 depends on tones of colors of the core 10 and the sheets 11, and natural or artificial light entering the holes 12 and its vicinities thereof. The sheet 11 is exposed on the bottom face 16 of the recess 13. The side face 17 of the recess 13 is formed by the edge of the layer 20.
A coat of paint different from the paint for the interior finish surface may be applied to the bottom face 16 of the recess 13. A paint of a hue, a brightness and a saturation of color, which provide a visual impression equivalent to that of the hole 12, is selected as the paint to be coated on the bottom face 16. Preferably, a head of a screw exposed to the interior space is also coated with a paint of a hue, a brightness and a saturation of color which give a visual impression equivalent to that of the bottom face 16 and the side faces 17 of the recess 13. Preferably, the screws, each having a screw head with a pattern of minute indentations painted in a plant (FIG. 5(C)), are used for securing the boards 1.
Although the present invention has been described as to a preferred embodiments, the present invention is not limited thereto, but may be carried out in any of various modifications or variations without departing from the scope of the invention as defined in the accompanying claims.
For example, in relation to the architectural design, allocation, strength, sound absorption performance or the like of the boards 1, 2, it is possible to suitably change the size of the gypsum board for the board 1, 2, the dimensions and arrangements of the holes 12 and the recesses 13, and so forth. Such boards are exemplified in
Further, the substrate of the board 1, 2 is not limited to the gypsum board, but the other material, such as a calcium silicate board or MDF, may be used as the substrate of the board 1, 2.
The perforated board for building material according to the present invention is preferably used as an interior finish board used in an interior finish work. Especially, it is preferably used as a ceiling board to be used in a partitioned space, a room, a specific floor of a building, or a large space such as a hall which should be adjusted in its interior acoustic performance. Further, it is also preferably used as a board of a wall located near a ceiling. The arrangement of the present invention may be applied to an exterior finish material, a sound absorptive board for a high level road or an elevated railway, or the like.
Number | Date | Country | Kind |
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2004-132587 | Apr 2004 | JP | national |
2004-366580 | Dec 2004 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP2005/008463 | 4/27/2005 | WO | 00 | 10/30/2006 |
Publishing Document | Publishing Date | Country | Kind |
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WO2005/106156 | 11/10/2005 | WO | A |
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