JP2012202084A - Wood laminate and slat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin wood laminate and a slat, capable of improving designability and coping with problems of product weight and an environmental load, and excellent in shape stability.SOLUTION: In a thin wood laminate 10 in which protrusive plates 11, 12 and 13 are stacked, fiber directions of the stacked protrusive plates 11, 12 and 13 cross one another with longitudinal directions A-A of the stacked protrusive plates 11, 12 and 13 among them. In addition, the stacked protrusive plates 11, 12 and 13 are bonded together with a thermosetting or irreversible thermoplastic adhesive. The formed wood laminate is used as a slat for a blind or a louver.

Description

  The present invention relates to a thin wood laminate used as, for example, a blind slat or a louver slat.

  Conventionally, as a material used for a house or the like, a slat 100 for a blind B as shown in FIGS. 11 and 12, a slat 200 for a louver L (200a, 200b) as shown in FIGS. Aluminum slats, which are made of curved aluminum sheets and coated on both sides, are the mainstream. However, aluminum slats have a cold impression for offices, have poor design, become heavy, and have a large environmental impact in terms of energy consumed (required) during production and disposal.

  In addition, slats using solid boards (about 3 to 6 mm) obtained from natural wood have been proposed in order to improve design properties, etc., but in harsh environments where they are exposed to relatively high temperatures such as near windows. In an environment facing two spaces with different temperatures and humidity, such as when partitioning a living room and a corridor, warping, bending, and twisting due to moisture absorption and desorption of moisture derived from natural wood Aging deterioration such as shape change and fading due to sunlight becomes a problem.

  In addition, there are resin molded products for blind slats and louver slats, but they are poor in design and have a large environmental impact similar to aluminum.

  On the other hand, Patent Document 1 describes an invention relating to a slat in which a thin plate of aluminum is used as a base material, and a natural wood veneer is pasted on the front and back surfaces and this lacquer is applied. Patent Document 2 describes an invention relating to a slat using a nonwoven fabric coated with a thermoplastic adhesive for shape fixation. Patent Document 3 describes an invention relating to slats using a nonwoven fabric made of thermoplastic resin fibers for shape fixation.

  On the other hand, plywood and LVL, which are wood materials, are used for flooring, interior base materials, furniture, structural materials and many other applications by taking advantage of their excellent workability and dimensional stability. in use. In particular, when a plywood or LVL is used for a member that mainly requires strength, such as a structural member, Patent Document 4 discloses a single unit adjacent to the top and bottom in order to increase the strength of the plywood or LVL. An invention relating to a skewed single-plate laminate in which the fiber directions of the plate layers are inclined in an oblique direction so as to cross each other is described.

JP-A-8-42269 JP 2008-274559 A Japanese Patent No. 3579658 Japanese Patent No. 3729410

  However, although the invention described in Patent Document 1 can improve the design by using a natural wood veneer, it is a slat in which dissimilar materials of aluminum and wood are bonded. As a result, the slats may be warped, bent or twisted, and the slats may be opened and closed during use. In addition, since the aluminum base material is exposed on the side surface of the slat, it may be shimmering when the slat is opened and closed, which affects the design. In addition, since the aluminum thin plate is used as a base material, there is a problem of product weight and environmental load.

  In addition, since the inventions described in Patent Document 2 and Patent Document 3 use a nonwoven fabric made of a thermoplastic adhesive or thermoplastic resin fibers to fix the shape, they are exposed to a relatively high temperature state such as a window. In a harsh environment, the shape cannot be maintained, causing problems in use.

  On the other hand, the invention described in Patent Document 4 is such that the fiber directions of vertically adjacent single plate layers are inclined in an oblique direction so as to cross each other, but the strength of a relatively thick laminated material is increased. Therefore, it cannot be applied to suppress warping, bending, and twisting of a thin wood material used as a blind slat or a louver slat and to improve shape stability.

  The present invention solves the above-mentioned conventional problems, and provides a thin wood laminate and slat that enhances designability, can cope with problems of product weight and environmental load, and has excellent shape stability. It is intended.

  The wood laminate of the invention according to claim 1 is a thin wood laminate formed by laminating veneers, and at least three of the laminated veneers have a fiber direction sandwiching a longitudinal direction of the laminated veneers. It is characterized by crossing.

  The invention according to claim 2 is characterized in that, in the wood laminate according to claim 1, the laminated veneer is bonded with a thermosetting or irreversible thermoplastic adhesive.

  The slat of the invention which concerns on Claim 3 consists of a woody laminated body of Claim 1 or Claim 2.

  According to the first aspect of the present invention, since the projecting plates are laminated to form a wood laminate, it can be formed thinner than plywood or LVL. Moreover, the designability can be enhanced by the grain of the veneer. In addition, because it is a wood material, it has a lighter product weight and less environmental impact than metal materials.

  According to the first aspect of the present invention, the fiber directions of at least three of the laminated projecting plates intersect with each other across the longitudinal direction of the laminated projecting plates, so that warpage, bending, and twisting are suppressed. Shape stability can be improved.

  According to the first aspect of the present invention, since the fiber directions of at least three of the laminated veneers intersect with each other across the longitudinal direction of the laminated veneers, the wood laminate is, for example, arcuate. In the case of such a cross-sectional shape, the cross-sectional shape can be maintained by laminating only the veneer plate, because it can be more difficult to split in the direction perpendicular to the cross-section compared to the wood laminate laminated with the fiber direction of the veneer plate being the same. be able to.

  Further, according to the invention described in claim 2, since the laminated veneer is bonded with a thermosetting or irreversible thermoplastic adhesive, it is a harsh environment that is exposed to a relatively high temperature state like a window. Moreover, it can prevent that an adhesive agent melt | dissolves and shape stability falls.

  According to the invention described in claim 3, by using the wood laminate for slats such as blinds and louvers, it is possible to manufacture blinds and louvers with high design properties and excellent shape stability.

  As described above, according to the present invention, it is possible to provide a thin wood laminate and a slat that are improved in design, can cope with problems of product weight and environmental load, and have excellent shape stability.

It is a top view which shows the projecting board which comprises the woody laminated body which concerns on embodiment of this invention. It is a top view which shows the some protrusion board from which a fiber direction differs. 1 is an exploded perspective view showing a wood laminate according to Embodiment 1. FIG. It is a top view which shows the veneer which comprises the wooden laminated body which concerns on Embodiment 1. FIG. 1 is an enlarged cross-sectional view showing a wood laminate according to Embodiment 1. FIG. It is a disassembled perspective view which shows the wooden laminated body which concerns on Embodiment 2. FIG. It is a top view which shows the veneer which comprises the woody laminated body concerning Embodiment 2. FIG. It is a disassembled perspective view which shows the wooden laminated body which concerns on Embodiment 3-4. It is a top view which shows the protrusion board which comprises the wooden laminated body which concerns on Embodiment 3. FIG. It is a top view which shows the protrusion board which comprises the wooden laminated body which concerns on Embodiment 4. FIG. It is a front view which shows a blind. It is a perspective view which shows the slat for blinds. It is a front view which shows a louver. It is a perspective view which shows the slat for louvers.

  Next, with reference to FIG. 1 thru | or FIG. 12, the wooden laminated body which concerns on embodiment of this invention is demonstrated. First, with reference to FIG.1 and FIG.2, the veneer which comprises the wooden laminated body which concerns on this embodiment is demonstrated. FIG. 1 is a plan view showing a projecting plate 1 constituting a wood laminate, and FIG. 2 is a plan view showing a plurality of projecting plates 1 having different fiber directions 2.

  As shown in FIG. 1, the protruding plate 1 is a long plate material, and is manufactured to a thickness of about 0.1 to 2.0 mm using a thin plate manufacturing apparatus such as a slicer using a raw material such as radiatapine. And after drying moderately, it cuts into a suitable size. It should be noted that the plurality of projecting plates constituting one wood laminate do not necessarily have the same thickness. Further, in the case of a thin wooden laminate having a thickness of 3 mm or less at the time of completion, it is preferable that the thickness of the laminated projecting plate is 0.1 to 1.5 mm. Moreover, the grain of the projecting board to be laminated can be applied regardless of the grid or the board, but the grid is more preferable.

  It is also possible to use hardwood such as maple, hippopotamus and lawan, but it is becoming difficult to obtain due to the problem of resource depletion, and coniferous wood such as radiatapine and domestic cedar must be used as an alternative material. Is in the situation. Conventionally, thin laminates using coniferous materials have been difficult to use due to problems of shape stability and designability (because there are many nodes), but according to this embodiment, such coniferous materials can be used effectively. it can.

  Here, reference numeral 2 indicates the fiber direction of the protruding plate 1, but the fiber direction 2 is inclined by an angle α with respect to the longitudinal direction AA of the protruding plate 1. FIG. 2 shows a plurality of projecting plates (a) to (g) having different fiber directions 2 in accordance with the angle α with respect to the longitudinal direction AA of the projecting plate 1. In the following description, a case where the angle α is positive is expressed as “fiber direction is rightward”, and a case where the angle α is negative is expressed as “fiber direction is leftward”.

The respective angles α in the projecting plates (a) to (g) are as follows. Note that the angle α is not limited to this.
(A) -45 °
(B) -20 °
(C) -10 °
(D) 0 °
(E) + 10 °
(F) + 20 °
(G) + 45 °

  Next, with reference to FIG. 3 thru | or FIG. 5, the wooden laminated body which concerns on Embodiment 1 of this invention is demonstrated. FIG. 3 is an exploded perspective view showing the wood laminate 10 according to the first embodiment, and FIG. 4 is a plan view showing the projecting plates 11, 12, 13 constituting the wood laminate 10 according to the first embodiment. FIG. 5 is an enlarged cross-sectional view showing the wood laminate 10 according to the first embodiment.

  As shown in FIG. 3, the wood laminate 10 is formed by sequentially laminating projecting plates 11, 12, and 13. Further, as shown in FIG. 4, the projecting plates 11, 12, and 13 are laminated so that the fiber directions intersect each other. That is, among the plurality of projecting plates shown in FIG. 2, the projecting plates (e) are used as the projecting plates 11 and 13, and the projecting plates (c) are used as the projecting plates 12. Thereby, the fiber directions of the projecting plates 11, 12, 13 are in a state of intersecting with the longitudinal direction of the projecting plate interposed therebetween. Since the angle α of the protruding plate (c) is −10 ° and the angle α of the protruding plate (e) is + 10 °, the angle formed by the fiber direction 2e of the protruding plate 11 and the fiber direction 2c of the protruding plate 12 is 20 °, Similarly, the angle formed by the fiber direction 2c of the protruding plate 12 and the fiber direction 2e of the protruding plate 13 is 20 °.

  In laminating the projecting plates 11, 12, and 13, an adhesive is applied to the surface of the projecting plate. The adhesive to be used is not particularly limited, but if it is a thermosetting or irreversible thermoplastic adhesive, it will be exposed to a relatively high temperature condition such as a window as compared with a thermoplastic one. Even in the environment, it is preferable because it is possible to prevent the adhesive from being dissolved and the shape stability from being lowered.

  FIG. 5 (a) is an enlarged cross-sectional view showing the wood laminate 10 laminated in this manner, and then adhesively cured with a die or a press having a required cross-sectional shape. FIG. 5 (b) is molded by a mold so that the cross section is arcuate, and can be used as the blind slat 100 shown in FIGS.

  According to the wood laminate 10 according to the first embodiment, the protruding plates 11, 12, and 13 are laminated to form the wood laminate 10. Therefore, the wood laminate 10 can be formed thinner than a plywood or an LVL. In addition, the design can be enhanced by the grain of the protruding plates 11 and 13. In addition, because it is a wood material, it has a lighter product weight and less environmental impact than metal materials.

  In addition, since the fiber directions of the laminated projecting plates 11, 12, and 13 intersect with each other across the longitudinal direction of the laminated projecting plates 11, 12, and 13, it is possible to suppress warping, bending, and twisting and to improve shape stability. it can.

  Moreover, since the fiber directions of the laminated projecting plates 11, 12, 13 intersect with each other across the longitudinal direction of the laminated projecting plates 11, 12, 13, the wood laminate 10 has a cross-sectional shape such as an arc shape, for example. In this case, since it is difficult to split in the direction perpendicular to the cross section as compared with the wood laminate in which the fiber directions of the projecting plates are laminated, the sectional shape can be maintained only by stacking the projecting plates.

  Moreover, even if it is the severe environment exposed to a comparatively high temperature state like a window by adhere | attaching the laminated protrusion board 11,12,13 with a thermosetting or irreversible thermoplastic adhesive, an adhesive agent is used. It is possible to prevent dissolution and deterioration of shape stability.

  Moreover, by using the wood laminate 10 for slats such as blinds and louvers, it is possible to manufacture blinds and louvers that have high design properties and excellent shape stability.

  As described above, according to the wood laminate 10 according to the first embodiment, it is possible to provide a thin wood laminate and a slat that have improved design properties, can cope with problems of product weight and environmental load, and have excellent shape stability. Can do.

  Next, with reference to FIG.6 and FIG.7, the wooden laminated body which concerns on Embodiment 2 of this invention is demonstrated. FIG. 6 is an exploded perspective view showing the wood laminate 20 according to the second embodiment, and FIG. 7 is a plan view showing the projecting plates 21, 22, 23, 24 constituting the wood laminate 20 according to the second embodiment. is there.

  As shown in FIG. 6, the wood laminate 20 is formed by sequentially laminating projecting plates 21, 22, 23, and 24. Further, as shown in FIG. 7, the projecting plates 21, 22, 23, and 24 are laminated so that the fiber directions intersect each other. That is, among the plurality of projecting plates shown in FIG. 2, the projecting plates (e) are used as the projecting plates 21 and 24, and the projecting plates (c) are used as the projecting plates 22 and 23. Thereby, the fiber directions of the projecting plates 21, 22, 23, and 24 are in a state of intersecting across the longitudinal direction of the projecting plates. Since the angle α of the protruding plate (c) is −10 ° and the angle α of the protruding plate (e) is + 10 °, the angle formed by the fiber direction 2e of the protruding plate 21 and the fiber direction 2c of the protruding plate 22 is 20 °. Similarly, the angle formed by the fiber direction 2c of the protruding plate 23 and the fiber direction 2e of the protruding plate 24 is 20 °.

  According to the wood laminate 20 according to the second embodiment, like the wood laminate 10 according to the first embodiment, the design is improved, the product weight and environmental load can be addressed, and the shape stability is excellent. Thin wood laminates and slats can be provided.

  Next, with reference to FIG.8 and FIG.9, the wooden laminated body which concerns on Embodiment 3 of this invention is demonstrated. FIG. 8 is an exploded perspective view showing the wood laminate 30 according to the third embodiment, and FIG. 9 is a plan view showing the projecting plates 31, 32, 33, 34, and 35 constituting the wood laminate 30 according to the third embodiment. FIG.

  As shown in FIG. 8, the wood laminate 30 is formed by sequentially laminating projecting plates 31, 32, 33, 34, and 35. Further, as shown in FIG. 8, the protruding plates 31, 32, 33, 34, and 35 are laminated so that the fiber directions intersect each other. That is, among the plurality of projecting plates shown in FIG. 2, the projecting plates (e) are used as the projecting plates 31, 33 and 35, and the projecting plates (c) are used as the projecting plates 32 and 34. Thereby, the fiber directions of the projecting plates 31, 32, 33, 34, and 35 are in a state of intersecting with the longitudinal direction of the projecting plate interposed therebetween. Since the angle α of the protruding plate (c) is −10 ° and the angle α of the protruding plate (e) is + 10 °, the angle formed by the fiber direction 2e of the protruding plate 31 and the fiber direction 2c of the protruding plate 32 is 20 °, Similarly, the angle formed by the fiber direction 2c of the protruding plate 32 and the fiber direction 2e of the protruding plate 33 is 20 °, and the angle formed by the fiber direction 2e of the protruding plate 33 and the fiber direction 2c of the protruding plate 34 is 20 °. The angle formed by the direction 2c and the fiber direction 2e of the protruding plate 35 is 20 °.

  According to the wood laminate 30 according to the third embodiment, like the wood laminate 10 according to the first embodiment, it is possible to improve design properties, cope with problems of product weight and environmental load, and excellent shape stability. Thin wood laminates and slats can be provided.

  Next, with reference to FIG.8 and FIG.10, the wooden laminated body which concerns on Embodiment 4 of this invention is demonstrated. FIG. 8 is an exploded perspective view showing the wood laminate 40 according to the fourth embodiment, and FIG. 10 is a plan view showing the projecting plates 41, 42, 43, 44, 45 constituting the wood laminate 40 according to the fourth embodiment. FIG.

  As shown in FIG. 8, the wood laminate 40 is formed by sequentially laminating projecting plates 41, 42, 43, 44, 45. Furthermore, as shown in FIG. 10, the projecting plates 42, 43, and 44 are laminated so that the fiber directions intersect each other. That is, among the plurality of projecting plates shown in FIG. 2, the projecting plates (e) are used as the projecting plates 42 and 44, and the projecting plates (c) are used as the projecting plates 43. Thereby, the fiber directions of the projecting plates 42, 43, and 44 are in a state of intersecting with the longitudinal direction of the projecting plate interposed therebetween. Since the angle α of the protruding plate (c) is −10 ° and the angle α of the protruding plate (e) is + 10 °, the angle formed by the fiber direction 2e of the protruding plate 42 and the fiber direction 2c of the protruding plate 43 is 20 °, Similarly, the angle formed by the fiber direction 2c of the protruding plate 43 and the fiber direction 2e of the protruding plate 44 is 20 °. Note that the projecting plates (d) shown in FIG. 2 are used as the projecting plates 41 and 45, and the fiber direction of the projecting plates 41 and 45 is the longitudinal direction (angle α = 0 °).

  According to the wood laminate 40 according to the fourth embodiment, like the wood laminate 10 according to the first embodiment, the design is improved, the product weight and environmental load can be addressed, and the shape stability is excellent. Thin wood laminates and slats can be provided.

  Here, the effect in the intensity | strength surface of the wooden laminated body in the said embodiment is demonstrated. The wood laminates laminated with the fiber directions crossed as in the above embodiment may be less likely to split in the direction perpendicular to the cross section of the product, compared to the wood laminate laminated with the fiber directions of the veneer being the same. it can. Because it is possible to have such characteristics, the strength in the length direction and width direction of products such as blind slats and louver slats that are thin and have a long product length relative to the product width. And the rigidity can be controlled.

  In addition, when the crossing angle is increased, the product is given lateral tenacity, and the product can be increased in lateral strength and rigidity. On the other hand, the rigidity (Young's modulus) in the length direction of the product tends to decrease as the inclination increases when the crossing angle is 20 ° or more. Therefore, it is possible to design while adjusting strength and rigidity in accordance with required product performance and use environment. In particular, it is also effective in improving the strength of a wood laminate having various cross-sectional shapes (for example, arc shapes) required depending on the part of the product.

  In addition, in order to obtain the effect in the said embodiment, although it is preferable to make the thickness of the wooden laminated body at the time of completion 6.0 mm or less (for example, including a comparatively thick louver slat etc.), In particular, it is effective in the case of a thin wooden laminate, such as a blind slat of 3.0 mm or less, and more effective in the case of an extremely thin wooden laminate of 2.0 mm or less.

  In the above embodiment, the projecting plate (c) having an angle α = −10 ° and the projecting plate (e) having an angle α = + 10 degrees are used as projecting plates that intersect the fiber directions. Depending on the performance and usage environment, it is possible to use a protruding plate with other angles.

  In addition, from the viewpoint of balance between the left and right sides, it is preferable that the angle of the intersecting fiber directions is symmetrical with respect to the longitudinal direction of the stacked projecting plates, but is not limited thereto.

  In addition, from the viewpoint of the balance between the left and right, it is preferable to laminate so that the total thickness of the protruding plates for each fiber direction is the same on the left and right, and if the protruding plates have the same thickness, the left and right are the same number. However, the present invention is not limited to this.

  Moreover, although it is preferable that the fiber directions of the outermost surface and the outermost surface are the same, it is not limited to this.

  In stacking the projecting plates, projecting plates in different fiber directions may be alternately stacked, or several projecting plates in the same fiber direction may be stacked in succession. However, it is preferable that the fiber direction of the laminated veneer is symmetrical with respect to the center in the thickness direction of the wood laminate, such as “right left and right”, “right left left and right” and “right left and right and left”. .

  Tables 1 and 2 show the experimental results of the shape stability of the wood laminates according to the embodiments of the present invention. In addition, this experimental result is in the structure of the wooden laminated body which concerns on Embodiment 2. FIG.

Normal → Fluctuation in moisture absorption

Normal → Variation in drying

  As shown in Table 1 and Table 2, when Example 1 and Comparative Example 1 are compared, shape stability is improved in both warpage and twist. On the other hand, when Example 1 and Comparative Example 2 are compared, the shape stability is improved with respect to torsion. Considering that the thickness of the laminate of Example 1 is less than half the thickness of the solid material of Comparative Example 2, it is considered that a sufficient effect is obtained.

DESCRIPTION OF SYMBOLS 1 Veneer 2 Fiber direction 10 Wood laminated body 11 Veneer plate 12 Veneer plate 13 Veneer plate 20 Wood laminate body 21 Veneer plate 22 Veneer plate 23 Veneer plate 24 Veneer plate 30 Wood veneer body 31 Veneer plate 32 Veneer plate 33 Veneer plate 34 Veneer plate 35 Veneer plate 40 Veneer laminate 42 Veneer plate 41 Projection plate 44 Projection plate 45 Projection plate 100 Slat 200 Slat B Blind L Louver

Claims (3)

  A thin wood laminate formed by laminating veneers, wherein the fiber directions of at least three of the laminated veneers intersect with each other across the longitudinal direction of the laminated veneers body.   2. The wood laminate according to claim 1, wherein the laminated projecting plates are bonded with a thermosetting or irreversible thermoplastic adhesive.   A slat comprising the wood laminate of claim 1 or 2.

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