JP2006321201A - Wood processing method and compressed wood product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wood processing method capable of providing a conductive layer on wood to be processed easily and economically by a reduced number of processes and processing wood so as to be capable of easily mold the same, and to provide a compressed wood product. <P>SOLUTION: The wood processing method has a compression process for individually compressing a plurality of respective woods, a carbonization process for carbonizing at least a part of the surface of the predetermined wood contained in a plurality of the woods and a fixing process for superposing a plurality of the woods individually compressed in the compression process one upon another in a predetermined order to fix them. The compressed wood product is formed by processing a plurality of the woods into a predetermined three-dimensional shape by performing the wood processing method. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wood processing method for processing a plurality of timbers into a predetermined three-dimensional shape by compressing the timbers, and a compressed wood product formed by compressing a plurality of timbers.

  In recent years, natural wood has attracted attention. Since wood has a variety of grain, individual differences occur depending on the location of the raw wood, and the individual differences are the individuality of each product. In addition, scratches and changes in color caused by long-term use may also have a unique texture and may be familiar to the user. For these reasons, wood is attracting attention as a material that can produce unique and tasty products that are not found in products using synthetic resins and light metals, and its processing technology is also making dramatic progress.

  Conventionally, as a processing technique for such wood, after compressing one piece of softened water, and cutting the wood substantially parallel to the compression direction to obtain a plate-like primary fixed product, this primary fixed product is heated and absorbed by water. There is known a technique of forming a predetermined three-dimensional shape while performing the process (for example, see Patent Document 1). There is also known a technique in which a piece of wood compressed in a softened state is temporarily fixed, and this wood is put into a mold and recovered to mold (for example, see Patent Document 2). In these techniques, the thickness and compression rate of wood are determined in consideration of various points including individual differences and types of wood, strength of wood after processing, and its use.

Japanese Patent No. 3078452 JP-A-11-77619

  By the way, when forming an exterior material for electronic equipment using compressed wood, it is necessary to form a conductive layer that electrically shields electromagnetic waves propagating from the outside of the electronic equipment and protects internal wiring. Such a conductive layer is often formed by disposing a thin plate made of a conductive member such as brass on the surface of the compressed wood, but a separate conductive member is disposed on the compressed wood. The method of forming the conductive member and the step of attaching the conductive member to the compressed wood are required, and it is not always economical because it requires labor and material costs.

  In addition, when processing is performed with emphasis on the strength of the wood, the thickness of the processed wood must be increased to some extent, but when compressing a single piece of wood as in the prior art described above, There is a problem that the difficulty of molding increases by increasing the thickness of the wood.

  The present invention has been made in view of the above, and it is possible to easily and economically provide a conductive layer with less man-hours on a wood to be processed, and to provide a wood processing method and a compressed wood product that are easy to mold. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, the invention according to claim 1 is a processing method of wood that forms a predetermined three-dimensional shape using a plurality of wood, and each of the plurality of woods A compression step for individually compressing, a carbonization step for carbonizing at least a part of the surface of the predetermined wood contained in the plurality of woods, and a plurality of woods individually compressed in the compression step are stacked in a predetermined order And a fixing step for fixing.

  The invention according to claim 2 is the invention according to claim 1, wherein in the fixing step, a plurality of pieces of wood individually compressed in the compression step are arranged in an order in which the carbonized layer is located at a boundary between adjacent pieces of wood. It is characterized in that it is fixed in layers.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the carbonization step is performed before the fixing step and before or after the compression step.

  According to a fourth aspect of the present invention, in the first or second aspect of the invention, in the compression step, the wood forming the carbonized layer is sandwiched between a pair of molds corresponding to a shape to be deformed. By applying a compressive force and heating the compressive force, at least a portion of the mold that contacts the surface portion of the wood forming the carbonized layer is heated until reaching a temperature higher than the carbonizing temperature of the wood. The carbonization step is performed collectively.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein in the fixing step, a plurality of pieces of wood individually compressed in the compression step are stacked in a predetermined order and collectively. It is characterized by compressing.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, in the fixing step, the plurality of timbers are formed by a pair of molds corresponding to a shape to deform the plurality of timbers stacked in a predetermined order. It is characterized by applying a compressive force by pinching.

  The invention according to claim 7 is the invention according to any one of claims 1 to 4, wherein in the fixing step, a plurality of pieces of wood individually compressed in the compression step are stacked and bonded in a predetermined order. It is characterized by.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the fixing step is performed so that fiber directions of at least two pieces of wood among the plurality of pieces of wood intersect. Features.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein the plurality of timbers include timbers having different grain.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein the plurality of woods have substantially the same thickness.

  The invention according to claim 11 is characterized in that, in the invention according to any one of claims 1 to 10, the compressibility of each wood to be compressed in the compression step is substantially the same.

  According to a twelfth aspect of the present invention, in the invention according to any one of the first to eleventh aspects, in the compression step, each of the plurality of timbers is made of a pair of molds corresponding to shapes to be deformed. It is characterized in that a compressive force is applied by sandwiching.

  The invention according to claim 13 is a compressed wood product in which a plurality of individually compressed woods overlap to form a predetermined three-dimensional shape, and the woods have a carbonized layer on at least a part of a surface thereof. Is included.

  A fourteenth aspect of the invention is characterized in that, in the thirteenth aspect of the invention, the plurality of timbers are overlapped so that the carbonized layer is located at a boundary between adjacent timbers.

  A fifteenth aspect of the invention is the invention according to the thirteenth or fourteenth aspect, characterized in that it is an exterior material for exteriorizing an electronic device.

  According to the present invention, after compressing each of the plurality of timbers individually, carbonizing at least a part of the surface of the predetermined timber contained in the plurality of timbers, the plurality of individually compressed timbers are in a predetermined order. In this way, it is possible to provide a conductive layer easily and economically with less man-hours on the wood to be processed, and to provide a wood processing method and a compressed wood product that are easy to form. Become.

  The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below with reference to the accompanying drawings.

(Embodiment 1)
FIG. 1 is a perspective view showing a configuration of a compressed wood product according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. A compressed wood product 1 shown in these drawings includes a main plate portion 1a having a substantially rectangular surface, and two extending along the longitudinal direction of the main plate portion 1a and at a predetermined angle with respect to the main plate portion 1a. A side plate portion 1b, and two side plate portions 1c extending along the short direction of the main plate portion 1a and extending at a predetermined angle with respect to the main plate portion 1a, have a substantially uniform wall thickness (referred to as 2r). Have

The compressed wood product 1 has a substantially bowl-like shape in which an outer member 11 and an inner member 12 which are two pieces of compressed wood are overlapped. The external material 11 is a grid material having a fiber direction L ₁₁ substantially parallel to the longitudinal direction of the compressed wooden product 1. The inner member 12 is a grid material having a fiber direction L ₁₂ substantially parallel to the short direction of the compressed wood product 1. Thus, it is substantially perpendicular to the fiber direction L ₁₂ of the fiber direction L ₁₁ and inner member 12 of the outer member 11. The thickness of the outer material 11 and the thickness of the inner member 12 are the same, both r.

  A conductive carbonized layer Cb is formed on the inner surface of the outer material 11 facing the boundary with the inner member 12. The carbonized layer Cb only needs to be formed in the vicinity of the boundary between the outer member 11 and the inner member 12, and may be formed on the outer surface of the surface of the inner member 12 that faces the boundary with the outer member 11. . Further, the carbonized layer Cb may be formed on both the inner side surface of the outer member 11 and the outer side surface of the inner member 12.

  Next, a wood processing method according to Embodiment 1 of the present invention will be described. In the following description, a case where the compressed wood product 1 having the above-described configuration is formed will be described. However, the wood processing method according to the first embodiment can be applied to compressed wood products having other shapes. .

  First, the wood used as the raw material for the outer member 11 and the inner member 12 is formed from the raw wood. FIG. 3 is an explanatory view schematically showing a situation in which the wood that is the raw material of the outer member 11 and the inner member 12 is formed from the uncompressed solid material 50 that is the raw wood. The wood 51 used as the raw material of the external material 11 has a flat plate shape, and is shaped from the solid material 50 so that the longitudinal direction of the wood 51 is substantially parallel to the fiber direction L of the solid material 50. As shown in FIG. 4, the wood 51 thus shaped is a grid material having a wall thickness R (> r) and a surface grain G that runs substantially in parallel.

  On the other hand, the timber 52 that is the raw material of the inner member 12 has a flat plate shape, and is shaped from the solid material 50 so that the lateral direction of the timber 52 is substantially parallel to the fiber direction L of the solid material 50. As shown in FIG. 5, the timber 52 thus shaped is a grid material having a wall thickness R and a surface grain G running substantially in parallel. It is shorter than the length in the longitudinal direction.

  When the woods 51 and 52 are shaped from the solid material 50 as described above, the wood 51 and 52 are shaped by adding a volume that is reduced by a compression process described later. In addition, as the solid material 50, persimmon, persimmon leaf, paulownia, cedar, pine, cherry tree, persimmon, ebony, bamboo, teak, mahogany, rosewood, etc. can be used.

  Next, one surface of the wood 51 is carbonized (carbonization step). FIG. 6 is an explanatory view schematically showing the outline of this carbonization step. In the same figure, the case where one surface of the wood 51 is carbonized using the gas burner 200 is shown. That is, by igniting the gas burner 200 and blowing a flame against one surface of the wood 51 (the upper surface in the vertical direction in the case of FIG. 6), the carbonized layer Cb is formed on the surface where the flame is blown. The At this time, if at least one of the wood 51 and the gas burner 200 is periodically moved, a more uniform carbonized layer Cb can be formed. Hereinafter, the wood 51 in which the carbonized layer Cb is formed on one surface by the carbonization process is referred to as “wood 51C”.

  Subsequent to the carbonization step described above, the wood 51C is compressed (compression step). FIG. 7 is an explanatory diagram showing an outline of the compression process. FIG. 8 is a sectional view taken along line BB in FIG. As shown in FIGS. 7 and 8, in this compression step, the wood 51 </ b> C is compressed using two molds 61 and 71. Of the two molds, the mold 61 that applies a compressive force to the wood 51C from above the wood 51C has a convex portion 62 that projects downward. On the other hand, the mold 71 that applies a compressive force to the wood 51C from below the wood 51C during compression has a recessed portion 72 that is recessed downward.

  In performing this compression step, the wood 51C is first left in a high-temperature and high-pressure steam atmosphere for a predetermined time. The high temperature and high pressure here means that the temperature is 100 to 230 ° C., more preferably about 180 to 230 ° C., and the pressure is 0.1 to 3 MPa (megapascal), more preferably about 0.45 to 2.5 MPa. Refers to the state.

  Thereafter, the wood 51C softened by excessively absorbing moisture in the water vapor atmosphere described above is compressed in the same water vapor atmosphere. Specifically, first, the wood 51C is sandwiched so that at least one of the two molds 61 and 71 is brought close to the other mold, and a compression force is applied. FIG. 9 is a diagram showing this compressed state, and more specifically, a longitudinal sectional view (having the same cut surface as FIG. 8) showing a state in which the deformation of the wood 51C is almost completed in the compressed state. As shown in FIG. 9, by compressing the wood 51 </ b> C using a pair of molds 61 and 71, the wood 51 </ b> C is deformed into a substantially bowl shape corresponding to the three-dimensional shape of the gap between the mold 61 and the mold 71. To do.

  After leaving for a predetermined time in the state shown in FIG. 9, the mold 61 and the mold 71 are separated to release the compression, and the water vapor atmosphere is released to dry the wood 51C. Depending on the material of the wood 51C, when the two molds are separated, the original shape may be restored. In this case, the compression may be released and dried in a state where the wood 51C is sandwiched between the molds 61 and 71. Of course, the drying time of the wood 51C varies depending on the shape and type of the wood 51.

Assuming that the thickness of the wood 51C after the compression process is r ₁ (<R), the value of r ₁ is almost uniform regardless of the location. Therefore, the compression rate C ₁ of the wood 51C in the compression process is given by (R−r ₁ ) / R. Specific numerical values of the compression ratio C ₁ is approximately 0.3 to 0.6.

  By the way, the wood 51C has a grain, and its density is not uniform. For this reason, unevenness occurs on the surface of the carbonized layer Cb formed by the carbonization process due to the density difference. In the first embodiment, by performing the compression step subsequent to the carbonization step, the surface of the carbonized layer Cb can be leveled and unevenness can be eliminated.

So far, the compression process of the wood 51C has been described, but the same compression process is performed on the wood 52 as well. By using a pair of dies different from the dies 61 and 71 used for compressing the timber 51C, the timber 52 has a slightly smaller outer shape than the compressed timber 51C and is almost uniform regardless of the location. It is compression-molded into a substantially bowl shape having a wall thickness r ₂ (<R). Therefore, the compression rate C ₂ of the wood 52 in the compression process is given by (R−r ₂ ) / R.

In the first embodiment, each mold is designed so that the thickness r ₁ of the wood 51C after the compression process is equal to the thickness r _{2 of the} wood 52, and the compression rate C of the wood 51C in the compression process is ₁ and the compressibility C _{2 of the} wood 52 are equal (C ₁ = C ₂ ). Hereinafter, the wood 51C after the compression process is referred to as the outer member 11, and the wood 52 after the compression molding is referred to as the inner member 12.

  In addition, when sandwiching the timbers 51 and 52 and applying a compression force, the compression force may be adjusted by, for example, moving up and down a mold that applies the compression force from above. Such up-and-down movement may be realized by providing electrically-driven drive means and control means for controlling the drive of the drive means, or by connecting the upper and lower molds with screws. You may implement | achieve by fastening manually or automatically.

  After the compression step described above, the two members are overlapped so that the inner surface of the outer member 11 and the outer surface of the inner member 12 face each other, and the overlapped outer member 11 and inner member 12 are fixed (adhering). Process). FIG. 10 is an explanatory view showing an outline of this adhering step, and FIG. 11 is a sectional view taken along the line CC in FIG. In the first embodiment, as the fixing process, the outer member 11 and the inner member 12 that have been softened by being left in the same high-temperature and high-pressure steam atmosphere as in the compression process are used as a pair of molds 81 and 91 in the same steam atmosphere. The outer member 11 and the inner member 12 are collectively clamped by the pair of molds, and both members are fixed by applying a compressive force.

  Here, the configuration of the molds 81 and 91 will be described. First, the mold 81 that applies a compressive force to the inner member 12 from above has a convex portion 82 that fits to the inner surface of the inner member 12. In the convex portion 82, the curvature radius RA of the curved surface that abuts on the curved portion 12ab that curves between the bottom surface portion and the side surface portion on the inner side surface of the inner member 12 is smaller than the curvature radius RI of the inner side surface of the curved portion 12ab. . On the other hand, the mold 91 that applies a compressive force to the outer member 11 from below has a recess 92 into which the outer surface of the outer member 11 is fitted. In the recess 92, the curvature radius RB of the curved surface that contacts the curved portion 11ab that curves between the bottom surface portion and the side surface portion on the outer surface of the outer member 11 is smaller than the curvature radius RO of the outer surface of the curved portion 11ab.

  FIG. 12 is a cross-sectional view showing a state in which the overlapping outer member 11 and inner member 12 are sandwiched between a pair of molds 81 and 91 and a compressive force is applied, and the deformation of the outer member 11 and the inner member 12 is shown. It is a longitudinal cross-sectional view (it has the same cut surface as FIG. 11) which shows the state completed substantially. After leaving for a predetermined time in the state shown in FIG. 12, the compression is released and the fixed outer member 11 and inner member 12 are dried. When compression is performed in the fixing step, an appropriate adhesive may be applied in advance to the surfaces where the outer member 11 and the inner member 12 are in contact with each other.

  As a result of the fixing process described above, the thicknesses of the outer member 11 and the inner member 12 are substantially equal to r (see FIG. 2). The total thickness 2r of the outer material 11 and the inner member 12 is about 30 to 50% of the total thickness 2R of the two timbers 51 and 52 in a state of being formed from a solid material before compression.

  FIG. 13 is a perspective view showing a configuration of a digital camera to which the compressed wood product 1 processed as described above is applied as an exterior material. A digital camera 100 shown in FIG. 1 includes an imaging unit 4 including an imaging lens, a flash 5, and a shutter button 6, and is packaged by two cover members 2 and 3 formed from the compressed wood product 1, respectively. The digital camera 100 includes a control circuit that performs drive control related to imaging processing and the like, a solid-state imaging device such as a CCD and a CMOS, and a microphone and a speaker that perform audio input and output, thereby realizing the functions of the digital camera 100. Various electronic members and optical members are accommodated (not shown).

  FIG. 14 is a perspective view showing a schematic configuration of the cover members 2 and 3. Among these, a cylindrical opening 41 that exposes the imaging unit 4 and a rectangular parallelepiped opening 42 that exposes the flash 5 are formed in the main plate portion 2 a of the cover member 2 that covers the front side of the digital camera 100. Has been. Further, a semi-cylindrical cutout 441 is provided on the side plate portion 2b of the cover member 2.

  On the other hand, on the main plate portion 3a of the cover member 3 that covers the back side of the digital camera 100, a display unit realized by using a liquid crystal display, a plasma display, an organic EL display, or the like in order to display image information or character information. A rectangular parallelepiped opening 43 that exposes (not shown) is formed. The side plate portion 3b of the cover member 3 is provided with a semi-cylindrical cutout 442 that forms an opening 44 for exposing the shutter button 6 in combination with the cutout 441 of the cover member 2.

  In addition to the openings and notches described above, an opening for attaching a finder, an opening for displaying an input key that accepts an input of an operation instruction signal, and an interface (DC for connection to an external device) An opening that exposes an input terminal, a USB connection terminal, and the like may be provided. Furthermore, a sound output hole for outputting sound generated by a speaker inside the digital camera 100 may be provided.

  When the digital camera 100 is assembled by storing various electronic members, an appropriate adhesive is applied to the opposing side plate end faces of the cover member 2 and the cover member 3 and joined together. Then, you may seal the outer periphery of the junction part of two cover members using the sealing member which consists of an elastic member etc. Also, a groove portion is formed in the end portion of the side plate portion of one of the two cover members to be joined, and the end portion of the side plate portion of the other cover member is fitted in the groove portion. Protruding portions that can be combined may be formed, and both may be fitted together during bonding.

  Originally, wood is an insulator, but in the vicinity of the boundary between the outer member 21 and the inner member 22 of the cover member 2 and in the vicinity of the boundary between the outer member 31 and the inner member 32 of the cover member 3, the carbonization process described above is performed. The carbonized layers Cb are respectively formed. Therefore, if the compressed wood product according to the first embodiment is applied as an exterior material of the digital camera 100, electromagnetic waves propagating from the outside can be shielded by the carbonized layer Cb. Since the carbonized layer Cb is formed by carbonizing the surface of the wood as described above, it is not necessary to separately prepare a conductive member such as a metal. Therefore, it is suitable for reducing the size and weight of the digital camera 100 at low cost.

  Further, when the compressed wood product according to the first embodiment is applied as the exterior material of the digital camera 100, the carbonized layer Cb is not exposed to the outside or the inside, so that the appearance as wood is maintained and the exterior material is The fear of a short circuit with the substrate disposed inside can be avoided.

  The compressed wood product according to the first embodiment is a portable electronic device other than a digital camera, for example, a portable communication terminal such as a mobile phone, PHS or PDA, a portable audio device, an IC recorder, a portable television, a portable It can also be used as exterior materials for type radios, remote controls for various home appliances, and digital video. As described above, when the compressed wood product according to the first embodiment is applied as an exterior material of an electronic device, it is more preferable that the thickness thereof is about 1.6 mm.

  According to Embodiment 1 of the present invention described above, each of the two pieces of wood is individually compressed, and after carbonizing the surface of one of the pieces of wood, the two pieces of individually compressed wood are given a predetermined amount. By stacking in order and compressing and fixing again, it is possible to easily and economically provide a conductive layer (carbonized layer) with less man-hours on the wood to be processed, and a wood processing method that is easy to mold and It becomes possible to provide compressed wood products.

  In addition, you may make it perform the carbonization process in this Embodiment 1 with respect to the predetermined | prescribed surface of the outer member and / or inner member which are in the dry state after performing a compression process.

(Embodiment 2)
The wood processing method according to Embodiment 2 of the present invention is characterized in that the carbonization step of forming a carbonized layer on the surface of the wood shaped from the raw wood is performed together with the compression step of compressing the wood. And

  FIG. 15 is a diagram showing an outline of the compression step in the wood processing method according to the second embodiment, and corresponds to FIG. 8 described in the first embodiment. As shown in FIG. 15, a timber 51 shaped like a flat plate from a solid material 50 is sandwiched between two molds 63 and 71, and a compressive force is applied thereto. Among these, the mold 63 for applying a compressive force to the wood 51 from above has a convex portion 64 protruding downward. A heater 65 is installed inside the convex portion 64. The heater 65 is connected to a heating device 66 having a temperature control function. On the other hand, the mold 71 is as described in the first embodiment, and has a concave portion 72 that is recessed downward.

  When compressing a flat-shaped wood 51 having a thickness R from an uncompressed solid wood 50 that is a raw wood, the wood 51 is sandwiched between molds 63 and 71 and a predetermined compressive force is applied. The heater 65 is heated until the mold 63 reaches a temperature higher than the carbonization temperature of the wood 51 (generally about 350 ° C.) by operating the heating device 66. Thereby, the wood 51 is compressed and deformed into a predetermined three-dimensional shape, and the surface of the wood 51 in contact with the convex portion 64 of the mold 63 heated to a temperature higher than its own carbonization temperature is carbonized. That is, in the second embodiment, the compression process and the carbonization process are performed collectively in one process. As a result, the wood 51 becomes the outer member 11 having the carbonized layer Cb on the inner side surface after molding (see FIG. 2).

  Note that the compression step for forming the inner member 12 and the fixing step for fixing the outer member 11 and the inner member 12 in an overlapping manner are the same as those in the first embodiment. Therefore, the compressed wooden product completed through the fixing process is also similar to the compressed wooden product 1 described above, and has a substantially bowl shape having the carbonized layer Cb in the vicinity of the boundary between the outer member 11 and the inner member 12.

  According to Embodiment 2 of the present invention described above, each of the two timbers is individually compressed, and after carbonizing the surface of one of the timbers, the two individually compressed timbers are predetermined. In this order, the conductive layer (carbonized layer) can be easily and economically provided with less man-hours on the wood to be processed by stacking together and compressing and fixing together. A processing method and a compressed wood product can be provided.

  Moreover, according to this Embodiment 2, it becomes possible to process wood more rapidly and easily by carrying out the compression process and the carbonization process of the wood which form a carbonized layer collectively as one process. .

  As in the first embodiment, a carbonized layer may be formed on the outer surface of the wood that is the inner member. In this case, a heater is incorporated in a mold (corresponding to the mold 71 in FIG. 15 and used in the compression process of the inner member) that applies a compressive force from below the wood, and this heater is connected to the heating device. do it.

(Embodiment 3)
The wood processing method according to Embodiment 3 of the present invention performs the compression step and the carbonization step in the same manner as the wood processing method according to Embodiment 1 above, and has an outer member (having a carbonized layer on the inner surface) and an internal After forming the material, as a fixing step, the outer member and the inner member are overlapped, and the two members are bonded using a predetermined adhesive to form a compressed wood product.

  FIG. 16 is a diagram showing an outline of a fixing process in the wood processing method according to the third embodiment. As shown in the figure, the outer member 13 and the inner member 14 formed by the compression process are overlapped, a predetermined amount of a predetermined adhesive is applied to the bonding surfaces of both members, and the both members are bonded. As a result, the compressed wood product 1 shown in FIG. 1 is completed.

  In the fixing step described above, the inner surface of the outer member 13 and the outer surface of the inner member 14 have the same shape, so positioning is not necessary when bonding the two members, but the bonding pressure is set to an appropriate value. It is more preferable to perform bonding using some kind of jig. As such a jig, a mold used in the compression process of the outer member 13 (a mold corresponding to the mold 91 in FIG. 10 and the like) and a mold used in the compression process of the inner member 14 (a mold 81 in FIG. 10 and the like). Can be used in combination. In this case, what is necessary is just to apply the force required for adhesion | attachment in the state clamped by the two metal mold | dies mentioned above which overlapped the outer member 13 and the inner member 14. FIG.

  By the way, in this Embodiment 3, unlike the said 2 embodiment, it must compress to final thickness by a compression process. Therefore, for example, when the outer members 13 and 14 having the thickness r are formed by compressing the woods 51 and 52 having the thickness R, the specific value of the compression ratio C = (R−r) / R is 0. It is about .5 to 0.7.

  Instead of performing carbonization of wood using the gas burner 200, a heater is provided in one mold, and the mold is heated until reaching a temperature higher than the carbonization temperature of wood, as in the second embodiment. Thus, the carbonization step and the compression step may be performed collectively in one step.

  According to Embodiment 3 of the present invention described above, each of the two pieces of wood is individually compressed, and after carbonizing the surface of one of the pieces of wood, the two pieces of individually compressed wood are given a predetermined amount. By stacking and adhering in order, it is possible to easily and economically provide a conductive layer (carbonized layer) with less man-hours on the wood to be processed, and to provide a wood processing method and compressed wood products that are easy to mold It becomes possible to do.

  Further, according to the third embodiment, since the outer member and the inner member are simply bonded in the fixing step, it is possible to process the wood more quickly and easily.

(Other embodiments)
So far, the first to third embodiments have been described in detail as the best mode for carrying out the present invention, but the present invention should not be limited only by these embodiments. For example, instead of using the entire surface of the wood as a carbonized layer, a carbonized layer having a conductive pattern having a relatively large area that can be applied as a ground line may be formed on the surface of the wood. In this case, a through-hole portion for electrically connecting the carbonized ground line and the substrate disposed inside the electronic device may be formed in the inner member.

  It is also possible to form a carbonized layer between adjacent timbers using three or more timbers. In this case, since there are a plurality of boundaries where the carbonized layer can be formed, a carbonized layer for shielding electromagnetic waves is formed at one of the boundaries, and a carbonized layer forming a conductive pattern for the ground line is formed at one of the other boundaries. It may be formed.

  Further, the carbonized layer may be formed on the inner surface of the inner member and / or the outer surface of the outer member. Also in this case, if a carbonized layer is formed on the entire surface, the effect of shielding electromagnetic waves can be obtained. On the other hand, if a carbonized pattern having a relatively large area is formed, the carbonized pattern is applied as a conductive pattern for ground lines. can do.

  Further, when stacking and fixing a plurality of timbers, the timbers may be shaped so that at least the fiber directions of the timbers intersect each other. In this sense, the wood that is shaped from the raw wood is not limited to the grain material, and may be a grain material, a memorial material, or a lip material, depending on conditions such as the use of the compressed wood product and aesthetics. Moreover, it shape | molds so that it may have a different grain for every timber, and you may combine them suitably.

  In addition, when shape | molding a timber from a raw wood, you may shape | mold so that it may make three-dimensional shape which is not flat form. In this case, at the stage of shaping the wood, the necessary openings and notches may be formed together, or after the wood is shaped, the openings and notches are formed by cutting or drilling. Also good.

  As is clear from the above description, the present invention can include various embodiments and the like not described herein, and within the scope not departing from the technical idea specified by the claims. Various design changes and the like can be made.

It is a perspective view which shows the structure of the compression wooden product formed by the processing method of the timber which concerns on Embodiment 1 of this invention. It is the sectional view on the AA line of FIG. It is a figure which shows the condition which shapes wood from solid wood. It is a perspective view which shows the structure of the timber used as the outer member of the compression wooden product which concerns on Embodiment 1 of this invention. It is a perspective view which shows the structure of the timber used as the inner member of the compression wooden product which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the outline | summary of the carbonization process in the processing method of the wood which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the outline | summary of the compression process in the processing method of the timber which concerns on Embodiment 1 of this invention. It is the BB sectional view taken on the line of FIG. It is a longitudinal cross-sectional view which shows the state (state in which deformation | transformation was substantially completed) which is compressing the timber in a compression process. It is explanatory drawing which shows the outline | summary of the adhering process in the processing method of the wood which concerns on Embodiment 1 of this invention. It is CC sectional view taken on the line of FIG. It is a longitudinal cross-sectional view which shows the state (state in which the deformation | transformation was substantially completed) which has compressed the outer member and the inner member in the adhering process. It is a perspective view which shows the external appearance structure of the digital camera which applied the compressed wood product of FIG. 1 as an exterior material for electronic devices. It is a perspective view which shows the structure of the exterior material of a digital camera. It is explanatory drawing which shows the outline | summary of the compression process (carbonization process) in the processing method of the wood which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows the outline | summary of the adhering process in the processing method of the wood which concerns on Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compression wooden product 2, 3 Cover member 1a, 2a, 3a Main board part 1b, 1c, 2b, 2c, 3b, 3c Side board part 4 Imaging part 5 Flash 6 Shutter button 11, 13, 21, 31 External material 12, 14, 22 , 32 Inner member 11ab, 12ab Curved portion 41, 42, 43, 44 Opening portion 50 Solid material 51, 51C, 52 Wood 61, 63, 71, 81, 91 Mold 62, 64, 82 Convex portion 65 Heater 66 Heating device 72, 92 Concave portion 100 Digital camera 200 Gas burner Cb Carbonized layer G Wood

Claims (15)

A method of processing a wood that forms a predetermined three-dimensional shape using a plurality of wood,
A compression step of individually compressing each of the plurality of woods;
A carbonization step of carbonizing at least a part of the surface of the predetermined wood contained in the plurality of wood to form a carbonized layer;
A fixing step of stacking and fixing a plurality of pieces of wood individually compressed in the compression step in a predetermined order;
A method for processing wood, comprising: The fixing step includes
The wood processing method according to claim 1, wherein a plurality of pieces of wood individually compressed in the compression step are stacked and fixed in an order such that the carbonized layer is positioned at a boundary between adjacent woods. The carbonization step includes
The wood processing method according to claim 1 or 2, wherein the method is performed before or after the fixing step and before or after the compression step.   In the compression step, the wood forming the carbonized layer is sandwiched between a pair of molds corresponding to the shape of the wood to be deformed to apply a compressive force, and when applying the compressive force, at least the carbonized layer is The carbonization step is performed collectively by heating a portion of a mold that contacts the surface portion of the wood to be formed until reaching a temperature higher than the carbonization temperature of the wood. 2. The method for processing wood according to 2. The fixing step includes
5. The wood processing method according to claim 1, wherein a plurality of pieces of wood individually compressed in the compression step are stacked in a predetermined order and compressed together. The fixing step includes
6. The wood processing method according to claim 5, wherein a compression force is applied by sandwiching the plurality of woods by a pair of molds corresponding to a shape to be deformed of the plurality of woods stacked in a predetermined order. . The fixing step includes
The wood processing method according to any one of claims 1 to 4, wherein a plurality of pieces of wood individually compressed in the compression step are stacked and bonded in a predetermined order. The fixing step includes
The wood processing method according to any one of claims 1 to 7, wherein at least two of the plurality of timbers are stacked so that fiber directions of the timbers intersect each other.   The wood processing method according to any one of claims 1 to 8, wherein the plurality of woods include woods having different grain.   The wood processing method according to any one of claims 1 to 9, wherein the plurality of woods have substantially the same thickness.   The wood processing method according to any one of claims 1 to 10, wherein the compressibility of each wood to be compressed in the compression step is substantially the same. The compression step includes
The wood processing according to any one of claims 1 to 11, wherein a compression force is applied by sandwiching each piece of wood by a pair of molds respectively corresponding to the shape to be deformed of each of the plurality of pieces of wood. Method. A compressed wood product in which a plurality of individually compressed woods overlap to form a predetermined three-dimensional shape,
The compressed wood product, wherein the plurality of wood includes wood having a carbonized layer on at least a part of a surface thereof.   The compressed wood product according to claim 13, wherein the plurality of woods are overlapped so that the carbonized layer is located at a boundary between adjacent woods.   The compressed wood product according to claim 13 or 14, wherein the compressed wood product is an exterior material for exterior packaging of electronic equipment.

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