JPH10102743A - Decorative laminated sheet with groove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent designing property by forming a plural number of section V shaped decorative grooves on a surface of a plane rectangular decorative sheet and forming a chamfered surface for joint groove formation on an upper edge part by providing joint parts on both side surfaces in the longitudinal direction. SOLUTION: A decorative sheet 1 with grooves applied with processing of a joint part, processing of a chamfered surface for joint groove formation and processing of grooving of decorative grooves on the side of a surface is molded by attaching and integrating a surface decorative material on the surface side of a plane base plate. Thereafter, a joint groove is formed by forming a plural number of section V shaped decorative grooves 4 in the longitudinal direction on the surface of this decorative sheet 1 and applying processing of chamfered surfaces 5 on edge parts on both side surfaces in the longitudinal direction of the decorative sheet 1. Chamfering depth Db is made smaller than depth Da of the decorative groove, a chamfering angle Qb is made larger than a half of a groove bottom opening angle Qa of the decorative groove 4, and chamfering width Wb is made half of decorative groove width Wa. Consequently, it is possible to maintain an excellent designing property by recognizing in human eyes that the joint groove and the decorative groove are the same groove in a state where a clearance is produced between the joint parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative panel with grooves used for interior wall materials, ceiling materials, floor materials and the like of buildings.

[0002]

2. Description of the Related Art A decorative panel having a plurality of thin parallel decorative grooves formed on the surface of the decorative panel can provide a three-dimensional effect and improve the design, so that it can be used for interior wall materials and ceilings. It is widely used as a material, flooring material and the like.

[0003] In actual construction, a plurality of decorative boards are joined, so that joints are usually formed on both sides of the decorative board parallel to the decorative groove, and joints are formed on the upper edges of both sides. A groove forming chamfered surface is formed. Then, when the decorative boards are joined with substantially no gap, the joining grooves formed by the chamfered surfaces have the same shape and the same dimensions as the decorative grooves previously formed on the decorative board surface, For example, when the decorative groove has a V-shaped cross section, the angle between the chamfered surface and the decorative plate surface is the same as the angle between the inclined surface forming the decorative groove and the decorative plate surface, and the length of the chamfered surface. Most commonly, is designed to be the same as the length of the inclined surface.

[0004]

However, in the above-described conventional decorative panel, the desired bonding state, that is, when there is substantially no gap between the decorative panel bonding portions at the time of bonding, is not desirable. Although it is possible to impart the three-dimensional appearance and design of the decorative board, in practice, there are often gaps between the joints of the decorative board, in which case the joint groove is different from the decorative groove to the human eye. As a result, there is a problem that a sense of incongruity is generated and the design is reduced.

More specifically, as shown in FIG. 8 (b), when there is a strict gap between the joints but there is substantially no gap, when the decorative plates (101) are joined together, The width Wm between the upper edges of the joining groove (106) formed by the chamfered surface (105) (hereinafter referred to as "joining groove width") Wm is the width between the upper edges of the decorative groove (104) shown in FIG. A virtual intersection obtained by extending two straight lines connecting the upper edge and the lower edge of the chamfered surface (105) in the cross section of the joining groove (106). The length (hereinafter, referred to as "joining groove depth") Dm from the perpendicular foot raised from (120) to the extension of the surface of the decorative plate (101) to the virtual intersection (120) is also the same as that of the decorative groove bottom. From vertex (121) to decorative board (10
1) The length from the foot of the perpendicular line rising on the extension of the surface to the top (121) of the bottom of the decorative groove (hereinafter referred to as "the decorative groove depth")
The joint groove (106) and the decorative groove (104) are recognized by the human eye as the same groove. However, when a gap is formed between the joining portions as shown in FIG. 8C, the joining groove width (Wn) becomes the decorative groove width (Wt).
Virtual intersection (120) of the joining groove (106)
) Since the joint groove depth (Dn) becomes larger than the decorative groove depth (Dt) due to the lowered position, the gap between the joints becomes a shadow and the user feels that the depth is further increased.
The joint groove (106) is recognized by the human eye as a groove different from the decorative groove (104), causing a sense of incongruity and, consequently, poor design.

[0006] The gap between the joints as described above may have already been generated at the time of construction due to the effects of fluffing and some irregularities at the joints of the decorative board. In addition, the decorative board dries and shrinks as the temperature and humidity change over time, so that a gap is generated between the joints. Particularly, in the latter case, a gap is generated between the joints because of the inherent inherent property of the decorative board that it shrinks due to a change in temperature and humidity.

The present invention has been made in view of such a technical background, and it is inevitable that a gap is formed between joints of a decorative board, that is, an ideal joint having substantially no gap. Regardless of whether it is a state or a state where a gap is formed between the joints, the joint groove and the decorative groove can be recognized as the same groove by human eyes, and as a result, excellent designability is maintained An object of the present invention is to provide a grooved decorative board.

[0008]

Means for Solving the Problems In order to achieve the above object, the present inventor has conducted intensive studies, and as a result, from the leg of a perpendicular line rising from the lower edge of the chamfered surface to the extension of the surface of the decorative board, the lower edge has been obtained. And the angle between the chamfered surface and the perpendicular is set to be greater than half the groove bottom opening angle of the cosmetic groove, and the perpendicular from the upper edge of the chamfered surface. By setting the horizontal distance to substantially the same length as half the width of the decorative groove, even if there is no gap between the joints at the time of joining, there is a gap between the joints In addition, the present inventors have found that a grooved decorative plate excellent in design can be obtained, which can be recognized that the joining groove and the decorative groove are the same groove.

That is, the grooved decorative board according to the present invention is:
A decorative plate having a flat rectangular shape, on the surface of which one or more decorative grooves having a V-shaped cross section or a substantially V-shaped cross section are formed along the length direction, and on both side surfaces in the length direction. In a decorative board in which a joining portion is formed and a joining groove forming chamfered surface is formed on an upper edge portion on both side surfaces having the joining portion, a perpendicular line rising from a lower edge of the chamfered surface on an extension of the surface of the decorative plate. The length from the foot to the lower edge of the chamfered surface is set to be smaller than the depth of the decorative groove, and the angle between the chamfered surface and the perpendicular is the groove bottom opening angle of the decorative groove. The horizontal distance from the upper edge of the chamfered surface to the perpendicular is set to be larger than half, and is set to substantially the same length as half the width between the upper edges of the decorative grooves. Is what you do.

In general, when a gap is formed between the joints, the gap becomes a shadow and the sense of depth is emphasized, causing a sense of incongruity. A perpendicular line (2
Since the length from the foot (21) of (0) to the lower edge of the chamfered surface (hereinafter referred to as “chamfering depth”) is set to be smaller than the decorative groove depth, the virtual intersection of the joining grooves during joining is set. Is equal to or higher than the top of the groove bottom of the decorative groove. That is, since the joint groove depth is equal to or smaller than the decorative groove depth, the sense of depth of the joint groove caused by the gap formed between the joints is reduced, or the gap between the joint groove and the decorative groove is reduced. Is not recognized. Further, the angle formed between the chamfered surface and the perpendicular (hereinafter referred to as “chamfered angle”) is set to be larger than half of the groove bottom opening angle of the decorative groove, so that the groove bottom opening angle of the joining groove is changed to the decorative groove. In other words, the inclination of the joint groove is gentler than the inclination of the decorative groove, and the sense of depth due to the shadow of the gap generated between the joints is reduced. Furthermore, since the horizontal distance from the upper edge of the chamfered surface to the perpendicular (hereinafter referred to as “chamfer width”) is set to substantially the same length as half the width of the decorative groove, the width of the decorative groove and the joint groove are set. The widths are substantially equal in length, and the difference in width between the two cannot be naturally recognized by the human eye. In a state where a gap is generated between the joints due to the combination of the above operations, the joint groove and the decorative groove are recognized by the human eye as the same groove.

On the other hand, when no gap is substantially formed, no shadow due to the gap can be generated. In this case, the groove width is visually strongly recognized.
According to the present invention, the chamfer width is set to substantially the same length as half of the decorative groove width. As a result, the decorative groove width and the joining groove width become substantially the same length, and the difference between the widths of the two is different. Naturally, it cannot be recognized by the human eye. Therefore, even in an ideal joining state in which there is substantially no gap, the joining groove and the decorative groove are recognized as the same groove by human eyes.

As described above, according to the present invention, regardless of the ideal joining state where there is substantially no gap or the state where a gap is formed between the joining portions, the joining groove is formed in the human eye. The decorative grooves are recognized as the same grooves, and as a result, an effect of maintaining excellent design can be obtained.

[0013] Preferably, the decorative groove and the chamfered surface are colored. As a result, the joint groove and the decorative groove can be surely recognized by the human eye as the same groove, and the three-dimensional effect can be further provided, and the design can be further improved. .

[0014] More preferably, in the joint portion of the decorative boards, at least a portion which is visible from the front side at the time of joining is colored. As a result, the effect of causing the human eye to recognize that the joining groove and the decorative groove are the same groove can be obtained more reliably.

In the present invention, the chamfer width must be set to substantially the same length as half of the width of the decorative groove, but it is not recognized that there is a difference in width when viewed visually as being substantially equal. This means that a difference in the degree is acceptable, for example, when the width of the decorative groove is 2.0 to 5.0 mm.
In this case, a value obtained by doubling the chamfer width is sufficiently acceptable even if a difference of about ± 30% occurs with respect to the decorative groove width, but is not particularly limited to this.

The groove bottom opening angle of the decorative groove means not only the case where the inclined surface of the decorative groove is straight in the cross section of the groove but also the case where the inclined surface is convex or concave as shown in FIG. An angle formed by two straight lines connecting the upper edge and the lower edge of the inclined surface. The groove bottom opening angle of the joining groove also refers to the angle between two straight lines connecting the upper edge and the lower edge of the chamfered surface.

Similarly, the chamfer angle means a straight line connecting the upper edge and the lower edge of the chamfered surface when the chamfered surface is convex or concave as well as when the chamfered surface is straight in the cross section of the chamfered surface. And a vertical line rising from the lower edge of the chamfered surface on an extension of the surface of the decorative board.

The imaginary intersection point refers to an intersection point obtained by extending two straight lines connecting the upper edge and the lower edge of the chamfered surface in the cross section of the joining groove as described above, but there is no gap between the joining portions. When the lower edges of the chamfered surfaces are in contact with each other, the lower edges of the chamfered surfaces (coincidence points of the lower edges of the two chamfered surfaces) are referred to, and such a case is also used.

Therefore, the depth of the joint groove rises from the virtual intersection obtained by extending two straight lines connecting the upper edge and the lower edge of the chamfered surface in the cross section of the joint groove as described above. It is defined as the length from the foot of the vertical line to the virtual intersection, but if there is no gap between the joints and the lower edges of the chamfered surfaces are in contact with each other as described above, the decorative plate is drawn from the lower edge of the chamfered surface From the leg of the vertical line that was launched on the extension of the surface,
The term refers to the length up to the lower edge, and is used to include such a case.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

[0021] The grooved decorative board (1) according to the present invention comprises:
As shown in FIG. 3, a flat substrate (2) is used, a surface decorative material (3) is adhered and integrated on the surface side of the substrate (2), and joints (9) and (10) are processed and joint grooves are formed. Basically, it has a chamfered surface (5) processed and a decorative groove (4) formed on the surface side, and has substantially no gap when the decorative plates (1) are joined together. Regardless of whether it is in a typical joint state or in a state where a gap has occurred between the joints,
The relation between the chamfered surface (5) forming the joint groove (6) and the decorative groove (4) so that the joint groove (6) and the decorative groove (4) are recognized as the same groove by the human eye. Is defined.

First, as shown in FIG.
The surface decorative material (3) is attached to the upper surface of the flat substrate (2) of about mm, particularly preferably about 5 to 20 mm via an adhesive.

As the substrate (2), a wooden board, an inorganic board, a synthetic resin board or a laminate of a plurality of these boards is used.

Examples of the wood board include plywood, lumber core plywood, medium fiber board (MDF), particle board, hard board, insulation board, wafer board (WB), oriented strand board (OSB), wood fiber A single sheet or a plurality of sheets, such as a board, a single-ply laminated material (LVL), a laminated wood, a continuous mesh fiber board (Zefferwood), and the like, may be used. Examples of the inorganic plate include a slate plate, a calcium silicate plate, a rock wool plate, a glass wool plate, and a pulp cement plate. Examples of the synthetic resin plate include those made of polyvinyl chloride resin, acrylic resin, polyester resin, melamine resin, and the like.

The above-mentioned substrate (2) may have the following configuration as required for the purpose of improving sound absorption and sound insulation. That is, a narrow groove or a circular concave portion may be appropriately formed on the back surface side of the substrate (2). In the substrate (2) in which a plurality of materials are stacked, at least one of the constituent materials may be subjected to groove processing, cutting processing, or hole processing. Further, a substrate (2) in which a plurality of materials are laminated.
Then, between the laminated materials, a synthetic or natural rubber sheet,
A non-woven fabric sheet, a foam sheet, a high specific gravity sheet mixed with a high specific gravity substance such as iron powder or lead powder, an asphalt-based sheet, or the like, or a laminate of a plurality of these may be interposed.

The surface decorative material (3) is most commonly and preferably a wooden veneer having a thickness of about 0.2 to 1.0 mm. Other decorative paper, decorative synthetic resin sheets, and synthetic resin impregnated materials are used. A conventionally known decorative material such as decorative paper can also be used. As the surface decorative material (3), a material further subjected to an arbitrary makeup such as pattern printing and coloring printing can be used.

As the adhesive for adhering the surface decorative material (3) to the substrate (2), various conventional adhesives can be used. For example, urea resin type, vinyl acetate resin type, ethylene acetate resin type vinyl type, rubber type, melamine resin type, urea / melamine co-condensation resin type, phenol resin type, aqueous vinyl urethane resin type, epoxy resin type, acrylic type or these Can be used in combination.

Incidentally, the surface decorative material (3) may be adhered through an interposing sheet for reinforcement as necessary. That is, when using a wooden veneer as the surface decorative material (3), paper, non-woven fabric, woven fabric,
It may be attached to the substrate (2) via a reinforcing sheet made of a resin sheet, metal foil, or the like.

[0029] Joints (9) and (10) are formed on at least both sides in the length direction of the substrate (2). Although the decorative plate (1) shown in FIG. 3 employs a phase-matching real shape as the shape of the joint portion, it has a book-like shape as shown in FIG. 4 and a phase-like shape as shown in FIG. May also be
The present invention is not particularly limited to these, and other known shapes such as tangs can be employed.

On the surface of the decorative plate (1), one or a plurality of decorative grooves (4) having a V-shaped or substantially V-shaped cross section are formed in the longitudinal direction. The forming method is not particularly limited, and may be a known method such as cutting and crushing. Further, it is desirable that the decorative groove (4) is also formed in the width direction, so that a three-dimensional effect can be further provided and the design can be more excellent. The most common shape of the decorative groove (4) is a V-shaped cross section as shown in FIG. 4, and other generally V-shaped (inclined surface is convex or concave (FIG. 5)). Can be. Further, the width and depth of the groove are not particularly limited, but preferably the width is 2.0 to
It is preferable to set the depth to about 5.0 mm and the depth to about 0.6 to 1.7 mm. The opening angle of the groove bottom of the decorative groove (4) is usually 80 to 120 °, but is not particularly limited to this.

On the other hand, the upper edges of both sides in the longitudinal direction of the decorative plate (1) are subjected to chamfering (5), and the method of forming the chamfering surface (5) is the same as that of the decorative groove (4). There is no particular limitation, and a known method such as cutting may be used. Since the chamfered surface (5) forms the joining groove (6) when the decorative plates (1) are joined together, the chamfered surface (5) must be formed so as to meet the following conditions which are the main features of the present invention. Must. That is, as shown in FIG. 1, the chamfer depth (Db) is smaller than the decorative groove depth (Da), and the chamfer angle (θb) is the groove bottom opening angle (θa) of the decorative groove (4).
), And the chamfer width (Wb) is substantially equal to half of the decorative groove width (Wa).
It is necessary to form a chamfered surface (5). In the above,
The difference between the value obtained by doubling the chamfer angle (θb) and the groove bottom opening angle (θa) of the decorative groove (4) is preferably within 30 °. The chamfering depth (Db) is equal to the decorative groove depth (Db).
a) is preferably set to 50% to 88%,
Above all, it is more preferable to be set to 60% to 80%.

FIG. 2 is an enlarged sectional view of a joining groove (6) when the decorative plates (1) according to the present invention are joined to each other, and FIG. FIG. If there is a gap between the joints, the gap becomes a shadow and the sense of depth is emphasized, causing a sense of incongruity. However, according to the present invention, the chamfering depth (Db) is determined in advance as described above. Is set smaller than the decorative groove depth (Da), the position of the virtual intersection (120) of the joining groove (6) at the time of joining is equal to or higher than the height of the groove bottom apex of the decorative groove (4). Higher than. That is, the joint groove depth (Dx) is equal to or smaller than the decorative groove depth (Da). When the joint groove depth (Dx) and the decorative groove depth (Da) are equal, the sense of depth of the joint groove (6) generated by shadowing the gap formed between the joints is reduced, When the joint groove depth (Dx) is smaller than the decorative groove depth (Da) as shown in FIG. 2B, the difference in depth between the joint groove (6) and the decorative groove (4). Is not recognized. Further, since the chamfer angle (θb) is set to be larger than half of the groove bottom opening angle (θa) of the decorative groove, the groove bottom opening angle (θd) of the joining groove is set.
Becomes larger than the groove bottom opening angle (θa) of the decorative groove. In other words, the inclination of the chamfered surface (5) becomes gentler than the inclination of the inclined surface (4a) of the decorative groove. The sense of depth due to the shadow of the gap is reduced. Furthermore, since the chamfer width (Wb) is set to substantially the same length as half of the decorative groove width (Wa), the decorative groove width (Wa) and the joining groove width (Wd) are substantially equal in length. As a result, the difference in width between the two cannot be recognized by the human eye. In a state where a gap is generated between the joints due to the above-described actions, the joint groove (6) and the decorative groove (4) are recognized as the same groove by the human eye.

On the other hand, when there is substantially no gap as shown in FIG. 2A, the groove depth and the groove bottom opening angle are provided between the decorative groove (4) and the joining groove (6). Although there is a difference in the above, since the shadow due to the gap cannot occur, in this case, the groove width is visually strongly recognized, but according to the present invention, the chamfer width (Wb)
Are set to be substantially equal in length to half the width of the decorative groove (Wa). As a result, the width of the decorative groove (Wa) and the width of the joint groove (Wc) are substantially equal to each other, and the difference in width between the two is different. Of course cannot be recognized by the human eye. Therefore, even in an ideal joining state having substantially no gap, the joining groove (6) and the decorative groove (4) are recognized as the same groove by human eyes.

As described above, according to the present invention, regardless of the ideal joining state where there is substantially no gap or the state where there is a gap between the joining portions, the present invention can The joint groove (6) and the decorative groove (4) are recognized as the same groove by the eyes, and as a result, an effect that excellent design property is maintained can be obtained.

The decorative plate (1) may be provided with the following surface decoration as required. That is, the surface of the surface decorative material (2) is polished by a method such as sanding according to a conventional method. Further, the surface decorative material (2) may be colored using a coloring agent (7), and if necessary, may be painted using a transparent or colored transparent paint (8). As the paint (8), in addition to general paints such as amino alkyd, polyurethane, lacquer, polyester, etc., if necessary, UV-curable paint, electron beam-curable paint and the like can be used. The coating may be a two-layer coating of undercoating and topcoating, or a three-layer coating of undercoating, intermediate coating, and topcoating, or a multi-layer coating of more. By applying these coatings, the surface of the decorative plate (1) can be made very glossy and the design can be further improved. Further, a glossy makeup such as wax can be applied on the coating.

As shown in FIG. 5, it is preferable that the decorative groove (4) and the chamfered surface (5) are colored using a coloring agent (7). Accordingly, the joint groove (6) and the decorative groove (4) can be surely recognized as the same groove by the human eye, and a three-dimensional effect can be further provided, and the design can be improved. It can be further improved. At this time, any color can be used for the colorant (7), and the colorant (7) may be the same color, similar color or different color as the color tone of the surface of the decorative plate (1). However, the coloring of the decorative groove (4) and the chamfered surface (5) should be the same color or similar color from the viewpoint of making the human eye recognize that the joint groove (6) and the decorative groove (4) are the same groove. There is a need.

Further, as shown in FIG. 6, it is preferable to apply a coloring agent (7) to at least a portion of the decorative plate joints (9) and (10) which are in view from the surface side at the time of joining, as shown in FIG. . As a result, the effect of causing the human eye to recognize that the joint groove (6) and the decorative groove (4) are the same groove can be obtained more reliably. At this time, the color of the colorant (7) may be the same color, similar color or different color as the color tone of the surface of the decorative plate (1), but the joining groove (6) is the same groove as the decorative groove (4). From the viewpoint of recognizing that the color is the same as or similar to the coloring of the decorative groove (4) and the chamfered surface (5). The colored portion of the joint is not limited to the portion shown in FIG. 6. For example, the entire surface of the upper horizontal surface of the joint (9) in FIG. 6 may be colored.

Grooved decorative board (1) produced as described above
If there is a concern that warpage may occur due to water absorption, moisture absorption, drying, etc. from the back surface, resin-impregnated paper, vulcanized fiber paper, synthetic resin film,
A waterproof sheet (11) such as a synthetic resin independent foam sheet, or a multilayer sheet in which paper, nonwoven fabric, woven fabric, etc. are arranged on both sides of an aluminum foil or synthetic resin layer is adhered, and subjected to waterproofing and moisture proofing treatment. Is preferred. Alternatively, a paint similar to the paint (8) may be applied to the back surface. Further, if necessary, a non-woven fabric may be attached to the waterproof sheet (11) via an adhesive.
It is preferable to attach a cushion sheet (12) such as a synthetic resin foam or a laminate of a plurality of these, so that sound absorption and sound insulation can be improved. In this case, it becomes easy to adjust to the unevenness and unevenness of the base, and the finish of construction can be improved.

[0039]

As described above, according to the grooved decorative plate of the present invention, even if a gap is formed between the joints, the chamfering depth is set to be smaller than the decorative groove depth. Therefore, the position of the virtual intersection of the joining groove at the time of joining is equal to or higher than the height of the groove bottom apex of the decorative groove. That is, since the joint groove depth is equal to or smaller than the decorative groove depth, the sense of depth of the joint groove caused by the gap formed between the joints is reduced, or the gap between the joint groove and the decorative groove is reduced. Is not recognized. In addition, since the chamfer angle is set to be larger than half of the groove bottom opening angle of the decorative groove, the groove bottom opening angle of the joint groove becomes larger than the groove bottom open angle of the decorative groove. Is gentler than the inclination of the decorative groove, and the sense of depth due to the shadow of the gap generated between the joints is reduced. Furthermore, since the chamfer width is set to substantially the same length as half of the decorative groove width, the decorative groove width and the joint groove width are substantially equal, and the difference between the two widths is not noticeable to human eyes. Of course cannot be recognized. In a state where a gap is generated between the joints due to the combination of the above operations, the joint groove and the decorative groove are recognized by the human eye as the same groove.

On the other hand, if there is substantially no gap, no shadow due to the gap can be generated. In this case, the groove width is strongly noticed visually. For example, as a result of the chamfer width being set to be substantially equal to half the width of the decorative groove, the width of the joint groove and the width of the decorative groove are substantially equal to each other, and the difference in width between the two is visually recognized by human eyes. Of course cannot be recognized. Therefore, even in an ideal joining state in which there is substantially no gap, the joining groove and the decorative groove are recognized as the same groove by human eyes.

As described above, according to the present invention, irrespective of whether it is an ideal joining state with substantially no gap or a state in which a gap is formed between the joining portions, The joint groove and the decorative groove are recognized by the human eye as the same groove, and as a result, an effect that excellent design property is maintained can be obtained.

Further, when the decorative groove and the chamfered surface are colored, it is possible to surely obtain the effect of causing the human eye to recognize that the joint groove and the decorative groove are the same groove, and to obtain a three-dimensional structure. The feeling can be further provided, and the design can be further improved.

Further, in the case where at least a portion of the decorative plate joining portion which is visible from the surface side at the time of joining is colored, the joint groove and the decorative groove are recognized as the same groove by the human eye. Thus, the effect of making it possible can be obtained more reliably.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing the relationship between a decorative groove and a chamfered surface of a decorative plate with grooves according to the present invention, wherein FIG. 1 (a) is a sectional view of the decorative groove, and FIG. ) Shows a cross-sectional view of the chamfered surface, respectively.

FIG. 2 is an enlarged cross-sectional view showing a joining groove formed when the decorative plates are joined to each other, and FIG. 2A is a cross-sectional view in a case where there is substantially no gap between joined portions. , Same figure (b)
Is a sectional view showing a case where a gap is formed between the joints.

FIG. 3 is a perspective view showing a grooved decorative board according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a grooved decorative board according to another embodiment.

FIG. 5 is a sectional view showing still another embodiment.

FIG. 6 is an enlarged cross-sectional view showing the vicinity of the joint when a configuration in which the joint is further colored is employed in the embodiment of FIG. 5;

FIG. 7 is an enlarged sectional view showing the definition of a groove bottom opening angle, showing the vicinity of a decorative groove, wherein FIG. 7A is a sectional view when the inclined surface is concave, and FIG. The cross-sectional view in the case where the surface is convex is shown.

FIG. 8 is an enlarged cross-sectional view showing a groove portion of a conventional grooved decorative plate, wherein FIG. 8A is a cross-sectional view of the decorative groove, and FIG.
Is a cross-sectional view of the joining groove when a gap is not substantially formed between the joining portions, and FIG. 3C is a cross-sectional view of the joining groove when a gap is formed between the joining portions.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Decorative grooved board 4 ... Decorative groove 5 ... Chamfered surface 6 ... Joint groove 7 ... Colorant 9, 10 ... Joint 20 ... Perpendicular 21 ... Perpendicular leg

Claims (3)

[Claims] 1. A decorative plate having a rectangular flat plate shape, and having a V-shaped cross section or a substantially V-shaped cross section along the length direction on its surface.
Or a decorative plate in which a plurality of decorative grooves are formed, a joining portion is formed on both side surfaces in the longitudinal direction, and a joining groove forming chamfered surface is formed on both side upper edges having the joining portion. The length from the lower leg of the chamfer surface to the lower leg of the chamfer surface from a perpendicular foot rising on an extension of the decorative board surface,
While being set smaller than the depth of the decorative groove, the angle between the chamfer surface and the perpendicular is set to be larger than half the groove bottom opening angle of the decorative groove, and from the upper edge of the chamfer surface A grooved decorative plate, wherein a horizontal distance to the perpendicular line is set to be substantially equal to a half of a width between upper edges of the decorative groove. 2. The grooved decorative board according to claim 1, wherein the decorative groove and the chamfered surface are colored. 3. The grooved decorative plate according to claim 2, wherein at least a portion of the joint between the decorative plates, which is visible from the front side at the time of joining, is colored.