JPS59213843A - Building panel and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a building board that has a design appearance full of three-dimensionality and solidity and has excellent sound absorption properties, and a method for manufacturing the same.

Traditionally, spraying has been widely known as a decorative board with an uneven pattern on the surface by painting or rainbow polishing, but with this processing method, the height of the protrusions is relatively low and it can be easily viewed from a distance. When viewed, the entire surface is flattened and there is no three-dimensional effect.Furthermore, the bottom of the uneven pattern is completely exposed, so it lacks depth and lacks a design appearance.

On the other hand, as building boards having sound-absorbing properties, there are known building boards in which a large number of small holes or recesses in a travertine pattern are provided in a porous board such as a soft fiber board or a rock wool board.

However, although this structure differs depending on the material of the building board and the shape of the small holes or recesses, in general, even if it has sound absorption properties in the mid to high frequency range, it has extremely poor sound absorption properties in the low frequency range. Furthermore, since the small holes and recesses are extremely small, they have a flat appearance with no depth and lack a three-dimensional effect, as described above.

The present invention has been made in view of these problems, and is a closure of a plate-like base material having a cross-sectional dovetail groove shape, the width of which is narrower on the surface side and wider on the inside side from the surface to the inside. A building board formed with an annular groove and a method for manufacturing the same are provided.

Embodiments of the present invention will be described with reference to the drawings. (1) is a plate-shaped substrate made of vegetable fiberboard, mineral fiberboard, or other suitable material and having a thickness of about 1 to 2 mm, and on the surface side thereof. A plurality of closed annular grooves (2) whose planar shape is circular, rectangular, polygonal or other suitable shape and whose depth is approximately % to % of the thickness of the plate-like base material (1), preferably 4th. -----(2) was excavated and formed.

These grooves (2) include a narrow groove part (3) that opens on the surface side of the plate-shaped base material (ri), and a groove cut into the inside of the plate-shaped base material (1) that communicates with the narrow width groove part (3). The groove width of the narrow groove portion (3) is approximately equal to or slightly smaller than the thickness of the plate-shaped base material (1). The width of the internal widening groove part (4) is approximately 1°3 to 2.0 times that of the narrow groove part (3) on the opening side. .

Furthermore, the internal widening groove part (4) is provided along the shape of the narrow width groove part (3), but the width direction is not the same as that of the narrow width groove part (3).
The lower end of the both side wall surfaces of 3) may be widened to both sides, or only the lower end of the - side wall surface may be widened.

In addition, a closed annular groove (2) consisting of these groove parts (3) and (4)
) does not necessarily have to have the same groove width over its entire circumference, but may vary.

(5) is an island-shaped protrusion surrounded by the closed annular groove (2). This protrusion (5) does not necessarily need to be formed flush with the surface of the plate-like object, and may be formed below the surface of the plate-like object.

Next, to describe the manufacturing method of such building boards, first, a rotary blade (6) such as a router having the same diameter as the narrow groove part (3) is placed on the surface of the plate-shaped base material (1) at an appropriate position. After drilling a hole with a desired depth (the depth of the groove (2)) while rotating the rotary blade (6), as shown in FIG.
A closed annular groove (2) is excavated while moving in a plane direction to draw an appropriate trajectory such as a circular shape or a rectangular shape.

Next, insert a rotary blade whose height is smaller than the depth of the annular groove (2) into the annular groove (2) and insert the rotating shaft (7) into the annular groove (2).
The inside of the groove is expanded laterally by shifting the groove width center line inwardly or outwardly, and in this state, the rotary blade (d) is moved along the groove (2) to narrow the surface side. A wide groove portion (4) is cut inside the wide groove portion (3).

During this cutting, the rotary blade (6') is held parallel to the narrow groove (3) with the axis (7) of the rotary blade (6') shifted from the center of the narrow groove (3) on the surface side to the other side. (6) It is also possible to move the narrow groove part (3) as shown in Figures 1 to 3.
It is possible to obtain wide groove portions (4) that are enlarged from the lower ends of both side walls to both sides.

Note that the wide groove portion (4) may be cut during excavation of the groove (2), that is, the narrow groove portion (3).

In addition, in order to excavate such a closed annular groove (2) having a dovetail-shaped cross section, a deep and narrow groove (3) is excavated in advance using a rotary blade having an appropriate thickness and height, and then the width is widened. A rotary blade having the same wall thickness as the height of the groove (4) is brought into contact with the bottom of the groove, and while being rotated, the axis is shifted from the center of the groove to one side as described above to widen the groove (4). Alternatively, the closed annular groove (2) may be excavated at one time using a cutter having a small-diameter blade for excavating narrow grooves and a large-diameter blade for excavating wide grooves, which are integrally arranged vertically. May be excavated. In this case, as shown in Fig. 5, a slot (8) with the same diameter as the large-diameter blade is obtained at the start of excavation, and a slot (8) with a narrow upper part and an enlarged lower part is obtained from the slot (8). A groove is formed.

As described above, the building board of the present invention is formed by cutting a closed annular groove with a narrow opening groove width on the surface side and a wide internal groove width in a plate-like base material, so it is different from conventional ceilings. It exhibits a deep and solid feeling that could not be obtained with architectural boards such as boards,
Moreover, since the internal groove is wide, it gives a sense of depth even when viewed directly from an oblique direction, giving it an extremely three-dimensional effect.Furthermore, the shape and size of the closed annular groove create an excellent appearance in terms of design. It is intended to be presented.

Furthermore, the narrow groove on the surface side and the widened groove on the inside form a dovetail groove shape in cross section, so that sound waves in a specific range of frequencies, especially in the low range, are silenced by giving them the same pedigree as a Helmholtz resonator. Furthermore, sound at other frequencies can be diffusely reflected and absorbed within the widening groove.In particular, when a porous material such as a soft fiberboard or a Q+Y wool board is used as the plate-like base material, the sound can be absorbed. In some cases, it has a high sound-absorbing effect, making it ideal for ceiling panels and interior decoration materials in music rooms, etc.

Moreover, since the method of the present invention involves excavating and forming the inner widening groove part of the closed annular groove of a desired depth using a rotary blade in the plate-shaped base material, the groove width and the inner widening groove part can be increased and A building that can be formed into any shape, easily excavated with a rotary blade, and can form a wide variety of annular grooves depending on the size of the rotary blade and the direction of movement, and has excellent sound absorption and design. This is something you can get a board from.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view thereof, Fig. 2 is a longitudinal front view, Fig. 3 is a partially cutaway enlarged perspective view, and Figs. 4 and 5 show annular groove formation. FIG. 3 is a simplified plan view showing the state. (1)... Plate base material, (2)... Closed annular groove, (8
)... Narrow groove part, (4)... Wide groove part, (6)...
Rotating blade. Patent applicant: Daiken Kogyo Co., Ltd. → To Masashi Bei 58

Claims (1)

[Claims] ■ A building board formed by cutting a closed annular groove with a wide open groove width on the surface side and a wide internal groove width on a plate-shaped base material. (2) The building board according to claim 1, wherein the internal widening groove portion expands only in one direction from one side wall surface of the narrow width groove portion on the front side. (2) The building board according to claim 1, wherein the internal widening groove portion expands in both directions from both side wall surfaces of the narrow width groove portion on the front side. (2) A method for manufacturing a building board, which comprises excavating and forming a closed annular groove of a desired depth and an internal widening groove portion of the groove using a rotary blade in a plate-shaped base material. The inner bottom widening groove is moved by moving the zero-rotation blade along the narrow groove while being shifted by a certain dimension toward the side wall of the narrow groove with respect to the width center of the narrow groove opening on the surface of the plate-shaped base material. 5. A method for manufacturing a building board according to claim 4, which comprises excavating a.