JP2012206270A - Curved plywood, method for manufacturing the same, and plywood - Google Patents

Abstract

Provided is a curved plywood that can be subjected to processing such as window opening processing on a curved wood without using a special forming jig, and can be sufficiently substituted for a plastic material, and a method for manufacturing the same.
A curved plywood 6 is formed by further bending a plywood made of three or more wood boards (single board), and the wood boards 2F and 2R on both outer sides thereof have the same grain direction. Direction (forward direction), and at least one of the wood boards sandwiched between them is laminated so that the grain direction is a direction (cross direction) intersecting the grain direction of both outer sides (cross direction) to form a plywood Furthermore, it is finally formed in a curved shape.
[Selection] Figure 1B

Description

  The present invention relates to a curved plywood, a manufacturing method thereof, and a plywood, and in particular, a curved plywood capable of replacing a plastic part of a home appliance (home appliance) having a curved shape and a window frame or the like with wood, and a manufacturing method thereof. And plywood.

  Conventionally, a curved portion in home appliances such as a television receiver is usually made of plastic. In other words, according to the plastic material, it is possible to directly mold the final form, which is not only advantageous in terms of manufacturing cost, but also excellent in various properties such as strength, durability and light weight. This is because home appliances and other products having advantages can be provided.

  However, on the other hand, plastic materials are made from fossil fuels, such as petroleum, which are expected to be depleted in the future, and they can generate toxic gases for the environment and human beings by combustion. In addition, the biodegradability is low and it is difficult to dispose of waste. In other words, durability is rather an environmental burden.

  On the other hand, for the prevention of global warming, the sound development and maintenance of forests is also important, and the regeneration and promotion of forestry and timber processing is an essential component in the healthy development and maintenance of such forests. In other words, from the perspective of creating a sustainable society and protecting ecosystems and the environment, the use and expansion of use of wood can be said to be an important technical issue.

  Under such circumstances, technical efforts are being made to replace wood products with molded parts and members that were conventionally manufactured from plastic materials, such as curved portions of home appliances. For example, the technology disclosed in the following non-patent document says that when processing a curved shaped plywood, a special molding jig is prepared and the processing conditions are adjusted to process the curved shaped plywood. Is.

Tochigi Prefectural Industrial Technology Center Research Report, Vol.1996 Page.67-71 (1997.06) Shigeru Tokiwa, Yoshitoshi Saito “Study on Precision Cutting Method of Molding Materials (2nd Report) Trial Manufacture of Adsorption Fixing Jig for Molding Materials”

  However, the processing of wood generally has a problem in that there are many parts that are difficult to process and the handmade elements are strong, resulting in high costs. Further, the technique disclosed in the document requires that a forming jig is specially prepared and used. There is a need for a technique capable of processing curved wood by a simpler method.

  Accordingly, the problem to be solved by the present invention is that, based on the problems of the prior art, it is possible to perform processing such as window opening on curved wood without using a special forming jig, plastic material It is another object of the present invention to provide a curved plywood that can be sufficiently substituted, a manufacturing method thereof, and a plywood for forming a curved plywood.

  As a result of earnestly working on the above problems, the inventor of the present application pays attention to the processing characteristics inherent in the wood grain direction of the wood, and can solve the problems based on various examinations of the lamination direction of the single plates in the plywood. That led to the present invention. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

[1] A curved plywood composed of three or more wood boards, and the wood boards on both outer sides thereof have the same grain direction (hereinafter referred to as “forward direction”), and at least of the wood boards sandwiched inside One piece is a curved plywood in which the grain direction intersects the grain direction on both outer sides (hereinafter referred to as “cross direction”).
[2] The curved plywood according to [1], wherein a curve is formed in a direction substantially orthogonal to the forward direction (hereinafter referred to as “orthogonal direction”).
[3] The curved plywood according to [2], wherein the wood boards are laminated so that the wood grain directions of the wood boards are alternately forward and cross directions.

[4] The curved plywood according to any one of [1] to [3], wherein the intersecting direction is a direction substantially orthogonal to the forward direction.
[5] The curved plywood according to any one of [1] to [4], which is for NC machining.
[6] The curved plywood according to any one of [1] to [4], which is NC processed.
[7] The curved plywood according to [6], wherein the NC processing is window opening processing.
[8] A method of manufacturing a curved plywood from a plywood composed of three or more wood boards, wherein the wood boards on both outer sides thereof have the same grain direction (hereinafter referred to as “forward direction”). In addition, at least one of the wood boards sandwiched between the insides is a direction in which the grain direction intersects the grain direction of both outer sides (hereinafter referred to as “intersection direction”), and a direction orthogonal to the forward direction (hereinafter, A method for producing a curved plywood, in which a curved plywood is obtained by subjecting the plywood to a pressure treatment by a curve forming means so that a curve is formed in the “orthogonal direction”).

[9] The curved plywood manufacturing method according to [8], wherein in the plywood, the intersecting direction is a direction substantially orthogonal to the forward direction, and a curved plywood for NC processing can be manufactured.
[10] The curved plywood according to any one of [1] to [5] is used, and the curved plywood is changed from a curved state to a flat state by suction processing using suction means of an NC processing apparatus. An NC-processed curved plywood manufacturing method in which the curved plywood is brought into a curved state again by performing a processing process and releasing the suction process.
[11] A plywood board composed of three or more wood boards, and the wood boards on both outer sides thereof have the same grain direction (hereinafter referred to as “forward direction”), and at least one of the wood boards sandwiched between them. The plywood is characterized in that the grain direction is a direction in which the grain direction intersects the grain direction on both outer sides (hereinafter referred to as “cross direction”), and is used for manufacturing curved plywood.

  That is, the present invention is based on a plywood whose characteristics are controlled by a novel and special laminated structure obtained by paying attention to the processing characteristics inherent in the wood grain direction.

  Since the curved plywood of the present invention, the manufacturing method thereof, and the plywood are configured as described above, according to this, the elasticity of the curved plywood against the curved wood (plywood) without using a special forming jig. By utilizing this property, it is possible to perform processing such as window opening processing by an NC router or the like, and it can be sufficiently substituted for plastic materials. Therefore, according to the present invention, it is possible to pioneer new uses of wood, and thus contribute to the promotion of forestry and wood processing industries. It is also consistent with the direction of sustainable society and ecosystem and environmental protection.

It is explanatory drawing which shows the basic composition of this invention curved plywood, and shows the structure of a plywood. It is explanatory drawing which shows the basic composition of this invention curved plywood, and shows the structure of the last form as a curved plywood. It is explanatory drawing which shows the structural example of the curved plywood of this invention. It is explanatory drawing which shows another structural example of the curved plywood of this invention. It is explanatory drawing which put together the difference in the characteristic by the method of combining a single board to a table | surface. It is explanatory drawing which shows the example of the processed curved plywood of this invention. It is a flowchart which shows this invention curved plywood manufacturing method. It is a flowchart which shows this invention NC processed curved plywood manufacturing method.

Hereinafter, the present invention will be described in detail with reference to the drawings.
1A and 1B are explanatory views showing a basic configuration of the curved plywood according to the present invention. FIG. 1A shows the configuration of the plywood, and FIG. 1B shows the configuration of the final form as the curved plywood. As shown in these figures, the curved plywood 6 is formed by further forming a plywood 5 made of three or more wood boards (single board) into a curved shape, and the wood boards 2F and 2R on both outer sides thereof are made of wood. The direction is the same direction (hereinafter referred to as “forward direction”), and at least one of the wood boards sandwiched between them, 3A in the figure is the direction in which the grain direction intersects the grain direction on both outer sides (hereinafter referred to as “intersection”). The main structure is that the plywood 5 is formed by being laminated so as to be “direction”), and finally formed into a curved shape.

  The curved shape can be formed by pressing using a pressing device. An appropriate condition can be used as the pressing condition, and the present invention is not limited to this. Moreover, although each figure shows the example of the plywood 5 and the curved plywood 6 in which the three single plates 2F, 3A, and 2R are laminated, the number of laminated single plates is not limited to this, including FIG. .

  In the curved plywood 6, the curve is formed in a direction substantially perpendicular to the forward direction (hereinafter referred to as “orthogonal direction”) with respect to the forward direction which is the grain direction in the single plates 2 F and 2 R on the outer sides. It can be.

  With this configuration, in the curved plywood 6, when the curve is finally formed in a direction orthogonal to the plywood 5, the direction of the grain directions of the outer single plates 2F and 2R does not oppose the curve, that is, Due to the forward direction, the curve is smoothly and reasonably formed. Further, inside the plywood 5 is provided with at least one single plate 3A or the like having a grain in the crossing direction. The single plate 3A or the like is applied to the single plates 2F and 2R on both outer sides. This has the effect of stabilizing the curved shape.

  That is, if all the single plates constituting the plywood 5 are in the same wood grain direction, the force to restore the original flat plate shape becomes larger than the once formed curved shape, and the stable maintenance of the curved shape (hereinafter referred to as the curved shape) , Also called “curvature stability”). If it does so, the curved plywood 6 with the finally stable shape cannot be formed.

  However, according to the plywood 5 according to the present invention, the curved plywood 6 having a stable shape can be finally obtained because the plywood 5 has good curvature stability for the reasons described above. In other words, the illustrated plywood 5 has a plywood structure that can be sufficiently used for manufacturing curved plywood. Further, according to the curved plywood 6 having such a configuration, good results can be obtained even when processing the curved plywood described later.

  In the present invention, the direction of curve formation is not necessarily limited to the orthogonal direction, but it is highly desirable that the direction is substantially orthogonal (orthogonal direction) in consideration of curvature stability and workability during processing. Here, “substantially orthogonal” refers to a range that can be grasped in the same manner as orthogonal in the provision of an actual curved shape, even if it is not strictly orthogonal by an angle of 90 °.

  In addition, the wood species of the wood board (single board) for constituting the curved plywood 6 is not limited at all as long as it has a grain, and any kind can be used. For example, Japanese conifers such as cedar, red pine, black pine, hiba, larch, spruce, sawara, yew, koyamaki, dogwood, hinoki, tsuga, himekomatsu, fir, todomatsu, juniper, kayak, ginkgo, togasawara, beech, mizunara, zelkova, There are no particular limitations on domestic hardwoods such as sakura, wig, camphor, tochinoki, chestnut, firewood, alder, and birch, and other foreign tree species.

  In addition, the adhesive used, the bonding method and other specific production conditions for producing the plywood are not particularly limited in the present invention, and any conventionally known method can be used as long as it meets the requirements of the present invention. be able to.

  FIG. 2 is an explanatory view showing a configuration example of the curved plywood of the present invention. As shown in the figure, in the curved plywood 26, the single plates sandwiched inside may be used in the crossing direction, such as the single plates 23A and 23B. Further, the present invention is not limited to this example, and the method of aligning the direction of the grain when laminating the single plates can be freely determined as long as the requirements described in FIGS. 1A and 1B are provided. However, it is more desirable to use the lamination method described with reference to FIG.

FIG. 3 is an explanatory view showing another configuration example of the curved plywood of the present invention. Also,
FIG. 3-2 is an explanatory diagram in which differences in characteristics depending on how single plates are combined are summarized in a table. As shown in FIG. 3, the curved plywood 36 is configured so that the grain directions of the wood boards 32F, 32A, 32B, 32C,..., 32F are alternately forward direction-crossing direction-forward direction-. The wood board 32F and the like are laminated. In addition, in the figure, the combination method (lamination | stacking state) of a single board is shown, and the method of formation of the curve with respect to it is drawn by the arc under it.

  With this configuration, the curvature stability of the curved plywood 36 can be optimized. The crossing angle according to the crossing direction with respect to the forward direction is not particularly limited as long as a certain curvature stability can be obtained thereby. However, as shown in the above figures and FIG. 3, it is more desirable that the crossing angle is a substantially right angle, that is, the crossing direction is a direction substantially orthogonal to the forward direction. This is because, by setting such an angle, the curvature stability can be maximized, and an optimum result can be obtained also when processing the curved plywood described later.

  Here, the characteristic with which this invention curved plywood is provided is demonstrated using FIGS. 3-2. The figure shows the difference in characteristics depending on the lamination method when three single plates are combined and laminated to form a plywood. In the example shown in the upper part of the figure, all the single plates are laminated in the forward direction to form a plywood, and the curve is formed in the orthogonal direction. Since the curved plywood obtained by this method has the same grain direction for all the single plates, the whole grain is aligned and therefore has elasticity. Therefore, it can be said that it is suitable for processing because it is sucked well and has a flat plate shape during suction processing in NC processing described later.

  However, since this curved plywood has a uniform grain as a whole, it is inferior in terms of stably maintaining the curved shape once formed by pressing. That is, the elasticity at the time of suction processing in NC processing is good, but the curvature stability is lacking.

  The example shown in the middle of the figure is that plywood is formed by a lamination method in which the inner single plate is crossed with respect to both outer single plates, and the curve is formed in the forward direction, not in the orthogonal direction. is there. The curved plywood obtained by this method has good curvature stability by press treatment because the single plate sandwiched between them is in the crossing direction. However, because of its low elasticity due to its structure, there is no stability at the time of suction processing in NC processing and it is not suitable for processing.

  The example shown in the lower part of the figure is the present invention. Curvature stability is good when the formed plywood is formed into a curved plywood by pressing, and the elasticity in suction processing in NC processing is sufficient. Therefore, the curved plywood of the present invention has a stable shape and is also suitable for NC machining.

  An NC processed curved plywood obtained by performing NC processing on the curved plywood of the present invention described above is also within the scope of the present invention. For example, the processed curved plywood 47 shown in FIG. 4 is an example in which a window portion 40 is provided by opening a window by NC processing.

  FIG. 5 is a flowchart showing the method for manufacturing a curved plywood of the present invention. As shown in the figure, this manufacturing method is a method for manufacturing a curved plywood 56 from a plywood 55 made of three or more wood boards (single board). As described above, as the plywood 55, the wood boards on both outer sides thereof are in the forward direction, and at least one of the wood boards sandwiched between the insides is the cross direction of the grain direction of the present invention. Plywood for manufacturing curved plywood is used. The plywood 55 is subjected to a pressurizing process (press process) by the curve forming means 58 and 59. By this pressure treatment, a curve is formed in the orthogonal direction of the plywood 55, and a curved plywood 56 is obtained.

  As described above, it is highly desirable that the crossing direction of the plywood 55 is a direction substantially orthogonal to the forward direction. Thereby, the favorable curved plywood for NC processing can be obtained. As the curve forming means 58 and 59, a conventionally known press apparatus can be used without any particular limitation.

  FIG. 6 is a flowchart showing the NC processed curved plywood manufacturing method of the present invention. As shown in the figure, this flow uses a curved plywood 66, which is changed from a curved state to a flat state <flat plate state, 66H> by suction processing using suction means 61V of an NC processing apparatus such as an NC router. While maintaining the state, NC processing is performed by the processing tool 61D such as a drill, and the suction processing by the suction means 61V is canceled to return the flat state <66H> of the curved plywood 66 to the curved state again. The curved plywood 67 is completed.

  As described above, the curved plywood 66 has elasticity that is more than the degree that it can be transformed into a flat plate state 66H that can be sufficiently processed in the suction processing in the NC processing. Therefore, window opening processing and other NC processing can be performed without problems, and a good NC processed curved plywood 67 can be obtained.

Examples of the present invention will be described below, but the present invention is not limited thereto.
Example Exhaust hole of air cleaner 1.6 mm thick, 450 mm square hiba material is coated with vinyl acetate emulsion adhesive on one side, 3 sheets are laminated, and the laminated one is pressed for 24 hours while curving Bonded to form a curved plywood. Next, using the NC router, the surface of the curved plywood was sucked by the suction mechanism to make the curved surface flat. While maintaining this state, the entire shape of the curved plywood was adjusted as designed with a dimension of 430 × 420 mm.

  At the same time, the surface was drilled to form exhaust holes. Furthermore, it was turned over and drilled from the back, and the shape of the exhaust hole was adjusted as designed. This completes the process, and as a finish, the entire exhaust hole was painted with astringency. The above process can smoothly perform the bending process for manufacturing the curved plywood and the subsequent NC process, and the exhaust hole part of the manufactured air purifier has a stable fixed shape with a curved shape. was.

  According to the curved plywood and the manufacturing method thereof of the present invention, it is possible to perform processing such as NC processing on curved wood (plywood) without using a special forming jig, and it is sufficient for plastic materials. Can be substituted. For example, a plastic part of a household appliance having a curved shape and a window frame or the like can be replaced with wood. Furthermore, the present invention also leads to effective utilization of unused resources such as thinned wood, leads to the development of new uses of wood, and can contribute to the promotion of forestry and wood processing industries. Therefore, it is an invention with high industrial applicability not only in forestry and wood processing industries but also in related industrial fields.

2F, 2R, 22F, 22R, 32F, 32R ... Wood plates on both outsides (single plate)
3A, 23A, 23B, 33A, 33B, 33C ... Wood board sandwiched inside (single board)
5, 55 ... Plywood 6, 26, 36, 56, 66 ... Curved plywood 40, 60 ... Window 47 ... Processed curved plywood 58, 59 ... Curve forming means 61D ... Processing tool 61V ... Suction means 66H ... Flat plate state 67 ... NC processed curved plywood

Claims (11)

It is a curved plywood composed of three or more wood boards, and the wood boards on both outer sides thereof have the same grain direction (hereinafter referred to as “forward direction”), and at least one of the wood boards sandwiched between them is Curved plywood in which the grain direction intersects with the grain direction on both outer sides (hereinafter referred to as “cross direction”). The curved plywood according to claim 1, wherein a curve is formed in a direction substantially orthogonal to the forward direction (hereinafter, “orthogonal direction”). The curved plywood according to claim 2, wherein the wood boards are laminated so that the grain direction of the wood boards is alternately a forward direction and a crossing direction. The curved plywood according to any one of claims 1 to 3, wherein the intersecting direction is a direction substantially orthogonal to the forward direction. The curved plywood according to any one of claims 1 to 4, wherein the curved plywood is used for NC machining. The curved plywood according to any one of claims 1 to 4, wherein the curved plywood is NC processed. The curved plywood according to claim 6, wherein the NC processing is window opening processing. A method for producing a curved plywood from a plywood composed of three or more timber boards, wherein the plywood has the same wood grain direction (hereinafter referred to as “forward direction”) on both outer timber boards, At least one of the sandwiched wood boards is assumed to have a direction in which the grain direction intersects the grain direction on both outer sides (hereinafter referred to as “intersection direction”), and a direction orthogonal to the forward direction (hereinafter referred to as “orthogonal direction”). The curved plywood manufacturing method which obtains a curved plywood by subjecting the plywood to a pressurizing process by a curve forming means so that a curve is formed in “). The method for manufacturing a curved plywood according to claim 8, wherein the intersecting direction of the plywood is a direction substantially orthogonal to the forward direction, and a curved plywood for NC processing can be manufactured. Using the curved plywood according to any one of claims 1 to 5, the curved plywood is changed from a curved state to a flat state by suction processing using suction means of an NC processing device, and NC processing is performed in that state. An NC-processed curved plywood manufacturing method in which the curved plywood is brought into a curved state again by releasing the suction process. It is a plywood composed of three or more timber boards, and the wood boards on both outer sides thereof have the same grain direction (hereinafter referred to as “forward direction”), and at least one of the timber boards sandwiched between them is A plywood characterized in that the grain direction is a direction intersecting with the grain direction on both outer sides (hereinafter referred to as “crossing direction”) and is for producing curved plywood.

Images