Finishing material

Abstract

This suppresses warping when using wood as lumber. [Solution] The finishing material 20 is formed by arranging wooden boards 22, each having grooves G1 and G2 formed along the longitudinal direction of at least one of its front and back sides, in the width direction.

Description

Technical Field

[0001] The present invention relates to a finishing material.

Background Art

[0002] Patent Document 1 below shows a configuration in which floorboards with a wood surface on the front side and floorboards with a wood back on the front side are alternately arranged. These floorboards are formed in a trapezoidal shape with the wood surface as the upper base, and are arranged so that the ends overlap each other to suppress warping.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When using solid wood as a finishing material in the form of a board, it is preferable to suppress warping for aesthetic reasons. However, as shown in Patent Document 1 above, simply arranging the wood surface and the wood back of the floorboard alternately in the board width direction may not provide sufficient warping countermeasures.

[0005] In consideration of the above facts, an object of the present invention is to suppress warping when using wood as a board.

Means for Solving the Problems

[0006] The finishing material according to claim 1 is formed by arranging wooden boards having grooves formed along the longitudinal direction on at least one of the front side and the back side in the width direction.

[0007] Wood has different rates of shrinkage due to heat and moisture on its front and back sides. Because of this, solid wood boards can warp, and finished materials formed by arranging these boards may become uneven. Even when solid wood is not used, warping can occur if the front and back sides are exposed to different environments.

[0008] In the finishing material of claim 1, a groove is formed along the longitudinal direction on at least one of the front and back sides of the wooden board. As a result, compared to a case where no groove is formed, the overall length of expansion and contraction is shortened by the amount of expansion and contraction of the grooved portion. In addition, it is possible to suppress the pushing and pulling of the portions separated by the groove. As a result, warping of the entire wooden board can be suppressed.

[0009] The finishing material of claim 2 is the finishing material of claim 1, wherein the widthwise ends of adjacent wooden boards are arranged to overlap.

[0010] In the finishing material of claim 2, the widthwise ends of adjacent wooden boards are overlapped, so that the surface beneath the finishing material is not visible through the joints. Furthermore, if the end of one wooden board placed on the back side tries to curl towards the front side, the end of the other wooden board placed on the front side can prevent the curling.

[0011] The finishing material of claim 3 is the finishing material of claim 2, wherein the wooden boards are solid plank-grained wood, and wooden boards with the face side facing outwards and wooden boards with the back side facing outwards are arranged alternately.

[0012] Flat-sawn lumber is planks of wood that are sawn so that one side is the face side and the other side is the back side. The face side then warps in a concave shape.

[0013] In the finishing material of claim 3, the end of the wooden board, where the front side is the face side, tends to curl towards the front side, The edges of wooden boards, where the front side is the front and back, tend to curl towards the back side. However, because these edges are placed on top of each other, the curling cancels out. [Effects of the Invention]

[0014] According to the present invention, warping can be suppressed when wood is used as a board material. [Brief explanation of the drawing]

[0015] [Figure 1] (A) is an elevation view showing a finishing material according to an embodiment of the present invention, and (B) is a cross-sectional view of (A) along line BB. [Figure 2] This is a schematic cross-sectional view showing the deformation of a plate material according to an embodiment of the present invention. [Figure 3] This is a cross-sectional view showing a modified example of a finishing material according to an embodiment of the present invention. [Figure 4] This is a cross-sectional view showing another modified example of a finishing material according to an embodiment of the present invention. [Figure 5] This is a cross-sectional view showing yet another modification of the finishing material according to an embodiment of the present invention. [Modes for carrying out the invention]

[0016] The finishing materials according to embodiments of the present invention will be described below with reference to the drawings. Components indicated by the same reference numerals in each drawing are considered to be the same component. However, unless otherwise specified in the specification, each component is not limited to one, and there may be multiple such components.

[0017] Furthermore, explanations of redundant components and reference numerals in each drawing may be omitted. This disclosure is not limited to the following embodiments, and modifications can be made as appropriate within the scope of the purpose of this disclosure, such as omitting components, substituting them with different components, or combining one embodiment with various modifications.

[0018] In each drawing, the directions indicated by arrows X and Y are along the horizontal plane and are perpendicular to each other. The direction indicated by arrow Z is along the vertical direction (up and down). In each drawing, the directions indicated by arrows X, Y, and Z are assumed to coincide with each other.

[0019] <Finishing material> In FIGS. 1(A) and 1(B), a finishing material 20 according to an embodiment of the present invention is shown in a front elevation view. As shown in FIG. 1(A), the finishing material 20 is a decorative material with a louver-like design in a front elevation view, and is used as a finishing material for various parts such as outdoor walls, eaves, indoor walls, ceilings, etc. The finishing material 20 is formed by combining a plurality of long wooden boards 22.

[0020] The wooden board 22 is arranged such that its longitudinal direction is along the vertical direction, and the finishing material 20 is formed by arranging these wooden boards 22 in the width direction. The wooden board 22 is fixed to the mounting surface 10 by driving screws or the like at arbitrary positions.

[0021] (Grain) As shown in FIG. 1(B), the wooden board 22 is a solid wood material. The wooden board 22 is a material (a so-called "board-grained" board material) sawn such that its longitudinal direction is along the vertical direction of the tree and its width direction is perpendicular to the radial direction of the tree.

[0022] In this figure, the upper side of the paper surface is the exposed surface (front side) of the finishing material 20, and the lower side of the paper surface is the mounting surface (back side) 10 of the finishing material 20. As shown in this figure, in the finishing material 20, the wooden board 22A with the front side being the outer surface of the tree (the outer side in the radial direction of the tree) and the wooden board 22B with the front side being the inner surface of the tree (the outer side in the radial direction of the tree) are alternately arranged. In the following description, when there is no need to particularly distinguish between the wooden boards 22A and 22B, they are collectively referred to as the wooden board 22.

[0023] (Front side groove) On the front side of the wooden board 22, a plurality (two in this embodiment) of protrusions 24 protruding from the reference plane L1 to the front side are formed. The reference plane L1 is a plane within the plane of the wooden board 22 and along the mounting surface 10, and the protrusion 24 is a ridge (linear protrusion) along the longitudinal direction of the wooden board 22.

[0024] Each of the protrusions 24 has the same width (width W1) and is arranged with a gap W2 between them. This gap W2 is called a groove G1 when viewed from the surface of the protrusion 24. The groove G1 is a groove that runs along the longitudinal direction of the wooden board 22.

[0025] Furthermore, the projection 24 located at the widthwise end (the projection 24 on the right in Figure 1) is formed by projecting out in the widthwise direction from one end E1 of the wooden board 22 in the widthwise direction. This projecting portion is placed overlapping with the adjacent wooden board 22. As a result, adjacent wooden boards 22 in the widthwise direction are placed with their widthwise ends overlapping each other.

[0026] Furthermore, the spacing between the protrusions 24 of adjacent wooden boards 22 is equal to the spacing W2 between the protrusions 24 of identical wooden boards 22. As a result, grooves G1 are formed between the protrusions 24 of adjacent wooden boards 22. Consequently, the finishing material 20 has an appearance in which louver-shaped protrusions 24 with a width W1 are arranged with spacing W2 between them.

[0027] (The groove on the back) On the back side of the wooden board 22, grooves G2 are formed, penetrating from the surface in contact with the mounting surface 10 toward the reference surface L1. The grooves G2 are grooves that run along the longitudinal direction of the wooden board 22. The grooves G2 are formed on the back side of the wooden board 22 with arbitrary width, number, and spacing.

[0028] Thus, in the finishing material 20, grooves (groove G1 on the front side and groove G2 on the back side) are formed along the longitudinal direction on both the front and back sides of the wooden board 22.

[0029] Wooden boards 22A and 22B have substantially identical cross-sectional shapes, as shown in Figure 1(B). "Substantially identical" means that the shapes are identical except for the groove G2 on the back side. The configuration of the groove G2 on the back side is arbitrary, so there may be differences in this groove G2.

[0030] <Mechanism and Effects> Generally, wood has different rates of shrinkage due to heat and moisture on its face and back sides. Because of this, solid wood, especially flat-sawn planks, is prone to warping, and finished materials formed by arranging these planks may become uneven.

[0031] For example, wooden board 22 is prone to warping, as shown by the dashed or dotted lines in Figure 2, with the face side of the wood becoming concave.

[0032] Therefore, in the finishing material 20 of the present invention, grooves (groove G1 on the front side and groove G2 on the back side) are formed along the longitudinal direction on both the front and back sides of the solid wood board 22. As a result, compared to cases where only one of grooves G1 or G2 is formed, or where neither groove G1 or G2 is formed, the overall expansion and contraction length is shortened by the amount of expansion and contraction in the parts where grooves G1 and G2 are formed.

[0033] In other words, in the wooden board 22A, the presence of groove G1 on the face side (and face side) reduces the amount of shrinkage on the face side. Also, the presence of groove G2 on the back side (and back side) reduces the amount of expansion on the back side.

[0034] Furthermore, in the wooden board 22B, the presence of groove G1 on the back side (and front side) reduces the amount of expansion on the back side. Also, the presence of groove G2 on the front side (and back side) reduces the amount of shrinkage on the front side.

[0035] As a result, both the amount of shrinkage on one side and the amount of elongation on the other side are reduced, thus suppressing warping.

[0036] Furthermore, it is possible to suppress the pushing and pulling of the separated parts separated by grooves G1 and G2.

[0037] In other words, in the wooden board 22A, the tension between the parts separated by groove G1 on the face side (and face side) is suppressed, reducing the amount of shrinkage on the face side. Also, the pressure between the parts separated by groove G2 on the back side (and back side) is suppressed, reducing the amount of elongation on the back side.

[0038] Furthermore, in the wooden board 22B, the parts separated by groove G1 on the back (and front) side of the wood are prevented from pushing against each other, reducing the amount of elongation on the back side. Also, the parts separated by groove G2 on the front (and back) side of the wood are prevented from pulling against each other, reducing the amount of shrinkage on the front side. As a result, warping of the entire wooden board can be suppressed.

[0039] Furthermore, in the finishing material 20 of the present invention, the widthwise ends of adjacent wooden boards 22 are arranged to overlap. This prevents the underlying surface of the finishing material 20 from being visible through the joints.

[0040] Furthermore, if the end E2 of one of the wooden boards 22A, which is positioned on the back side, tries to bend towards the front side, the end E3 of the other wooden board 22B, which is positioned on the front side, can prevent the bending.

[0041] Furthermore, in the finishing material 20 of the present invention, the wooden boards 22 are "flat-grained" material, and wooden boards 22A with the face side facing outwards and wooden boards 22B with the back side facing outwards are arranged alternately.

[0042] Therefore, the end E2 of the wooden board 22A, where the front side is the face side, tends to warp towards the front side, while the end E3 of the wooden board 22B, where the front side is the back side, tends to warp towards the back side. Since these ends E2 and E3 are arranged overlapping, the warping cancels each other out.

[0043] <Other Embodiments> In the above embodiment, the cross-sectional shape of the wooden board 22A with the front side facing outwards and the cross-sectional shape of the wooden board 22B with the front side facing inwards are substantially the same, but the embodiments of the present invention are not limited to this.

[0044] For example, as shown in Figure 3, the cross-sectional shape of the wooden board 22C with the face side facing outwards and the cross-sectional shape of the wooden board 22D with the back side facing outwards may be different. In the example shown in this figure, both ends of the wooden board 22C are positioned overlapping with both ends of the wooden board 22D.

[0045] Furthermore, both ends of the wooden board 22C are positioned on the mounting surface 10 side, and both ends of the wooden board 22D are positioned outside the ends of the wooden board 22C.

[0046] As a result, the end E2 of the wooden board 22C, where the front side is the face side, tends to bend towards the front side, while the end E3 of the wooden board 22D, where the front side is the back side, tends to bend towards the back side. Since these ends E2 and E3 are arranged overlapping, the bending cancels out.

[0047] Furthermore, in the above embodiment, wooden boards 22A with the face side facing outwards and wooden boards 22B with the back side facing outwards are arranged alternately, but the embodiments of the present invention are not limited to this. For example, in the example shown in Figure 1, all wooden boards 22 may be made of wooden boards 22A with the face side facing outwards, or they may be made of wooden boards 22B with the back side facing outwards.

[0048] Furthermore, although the wooden board 22 in the above embodiment is a board material cut with the grain facing outwards, the embodiments of the present invention are not limited to this.

[0049] For example, as shown in Figure 4, the wooden board 26 of the present invention may be made from lumber that has been sawn so that its longitudinal direction is aligned with the vertical direction of the tree and its width direction is aligned with the radial direction of the tree (so-called "straight-grained" board material).

[0050] Since boards cut with straight grain are less prone to warping compared to boards cut with flat grain, the warping prevention effect can be enhanced.

[0051] Furthermore, although the wooden board 22 in the above embodiment has different shapes on the front and back sides, the embodiments of the present invention are not limited to this.

[0052] For example, as shown in Figure 5, the wooden board 28 of the present invention may have the same shape on both the front and back sides. The wooden board 28 has a cross-sectional shape that is point-symmetric with respect to the center point O. If the wooden board 28 is rotated 180 degrees from the position shown in Figure 5 so that the side facing the mounting surface 10 becomes the exposed side, the arrangement of the front and back sides of the wood will be reversed, but the shape will not change.

[0053] According to this embodiment, a finishing material 20 can be formed using only one type of wooden board 28, in which wooden boards with the face side facing outwards and wooden boards with the back side facing outwards are arranged alternately.

[0054] Furthermore, in the above embodiment, the widthwise ends of adjacent wooden boards 22 are arranged to overlap, but the embodiments of the present invention are not limited to this. For example, the widthwise ends of adjacent wooden boards 22 may be arranged to butt against each other.

[0055] Even in this embodiment, by forming grooves along the longitudinal direction (groove G1 on the front side, groove G2 on the back side) on both the front and back sides of the wooden board 22, warping can be suppressed compared to cases where such grooves are not formed.

[0056] Furthermore, although the wooden boards 22, 26, and 28 were described as solid wood in the above embodiments, the embodiments of the present invention are not limited to this. For example, the wooden boards of the present invention may be laminated wood, plywood, composite materials using wood, etc.

[0057] Even when solid wood is not used, warping can occur if the environment exposed to the front and back sides differs. For example, there may be differences in sunlight, humidity, temperature, etc., between the mounting surface 10 and the exposed surface. In contrast, forming grooves in the wooden board can suppress warping.

[0058] Furthermore, in the above embodiments, grooves (front groove G1 and back groove G2) are formed on both the front and back surfaces of the wooden boards 22, 26, and 28, but the embodiments of the present invention are not limited to this. For example, the wooden board of the present invention only needs to have grooves formed on at least one of the front and back surfaces. That is, if either the front groove G1 or the back groove G2 is provided, warping of the wooden board can be suppressed. [Explanation of Symbols]

[0059] 20 Finishing materials 22 Wooden board 22A wood board 22B wood board 22C wood board 22D wood board 26 wooden boards 28 wooden boards G1 Ditch G2 Ditch

Claims

1. A finishing material formed by arranging wooden boards in the width direction, each board having a groove formed along its longitudinal direction on at least one of its front and back sides.

2. The edges of adjacent wooden boards are overlapped in the width direction. The finishing material according to claim 1.

3. The aforementioned wooden board is made of solid plank wood. The wooden boards, with the front side facing the grain and the back side facing the grain, are arranged alternately. The finishing material according to claim 2.

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