JP5311849B2 - Wooden material using coconut as a raw material and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize palm as a construction material for housing and the like and a material for furniture. <P>SOLUTION: There is provided the woody material 10 which uses the palm 50 as the raw material and is produced by laminating the upside surface part 11, middle layer part 12 and underside surface part 13. For the upside surface part 11 and underside surface part 13 there are used, of veneers prepared when the palm 50 is cut along the circumferential edge of the trunk and processed, veneers prepared from the part more outside in the diameter direction of the trunk than the veneer used for the middle layer part 12 is prepared from. And for the middle layer part 12 there is used, of veneers prepared when the palm 50 is cut along the circumferential edge of the trunk and processed, a veneer obtained from the part more inside in the diameter direction of the trunk than the veneers used for the upside and underside surface parts 11, 13. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a wood material made from coconut as a raw material and a method for producing the same.

  Conventionally, as a building material such as a house or a furniture material, a plywood made of wood or LVL (single plate laminate) has been used. Plywood and LVL can use materials unsuitable for production such as materials with many nodes and cracks, small-diameter materials, and end materials as raw materials. Further, the obtained plate has little anisotropy, is excellent in workability and dimensional stability, and is unlikely to be warped or distorted. And taking advantage of such excellent properties, it is used in flooring, staircases, furniture, civil engineering materials and many other situations.

  As a tree species for plywood and LVL, it has been common to use timbers collectively called southern materials such as lauan that are native to Southeast Asia. Lauan has a large diameter (more than 1m in diameter), and the material is uniform, has few nodes, is reasonably soft and easy to process, and is ideal as a raw material for plywood and LVL. However, in recent years it has become extremely difficult to obtain due to resource depletion.

  Therefore, as an alternative raw material for Rawan, Douglas fir (Pine pine), Radiata pine, and recently even Japanese cedar are being used. These alternative raw materials are relatively easy to obtain and have a relatively fast growth in wood, but have a smaller diameter (about 30-50 cm in diameter) compared to Lauan, and are somewhat non-uniform in material, such as knots. The current situation is that they are extremely numerous and cannot be completely replaced by raw materials. Moreover, although Radiata pine and domestic cedar can be stably produced from planted forests, especially Douglas fir, which is excellent in strength, is said to be depleting resources.

On the other hand, in Southeast Asian countries, coconut has been cultivated since ancient times. There are many kinds of coconut palms such as sago palm, oil palm, and coconut palm. Various products are made by using the fiber part of the fruit in addition to the fruit part being edible. Also, leaves are used as roofing materials locally.
On the other hand, regarding the use of the trunk part of the coconut palm, starch is collected from the trunk of the sago palm industrially. There was no effective usage to the extent that it was partially used for applications such as product processing.

The reason why the trunk portion of the palm has not been used effectively is that it has the following disadvantages particularly in terms of physical properties.
(1) The difference in strength is large in the same material. Although the strength near the bark (radially outside the trunk) is sufficient, the strength near the center (radial inside of the trunk) is greatly inferior. Variations in plywood strength occur.
(2) The moisture content is very uneven in the same material, and uniform drying is difficult. The moisture content varies greatly from 50 to 100% or more depending on the location, so the drying cost is high. Insufficient drying can cause warping and distorting after the product has been produced, and there is a risk of drought and decay due to the effects of residual moisture.
(3) Fast decay after felling It is easy to decay because the place where it grows is a hot and humid rainforest, and the trunk is rich in starch.

  Among the reasons described above, particularly as described in (1) above, since the palm material is brittle near the center of the trunk and has low strength, it is a main factor that is not effectively used as a raw material for the wood material. . This is a problem common to not only coconut materials but also timber having a fragile portion (brittle core material) near the center of the trunk.

On the other hand, as a wood material using an insulator material, in Patent Document 1, after making the insulator material into a plate shape, the melted resin is pressed and infiltrated, and radiation is irradiated to molecularly polymerize and strengthen. The invention relating to a building material in which the obtained plate materials are arranged and bonded in a required shape is described.
Patent Document 2 describes an invention relating to a kind of lumbar core plywood, in which a long piece of wood is obtained by making a coconut material, and then a large number of the long pieces of wood obtained are adjacent to each other and thin plates are bonded from the front and back surfaces. Has been.
JP-A-57-195644 JP 2003-62808 A

  However, the coconut material has extremely large variations in strength near the bark and near the center. Therefore, although plywood and LVL using the vicinity of the bark have sufficient strength, the density is high and the weight is excessive. Conversely, if the vicinity of the center is used, the weight is reduced, but the strength is completely insufficient. Even if both near the bark and near the center are used, the strength cannot be ensured by mixing them properly.

  Further, in the inventions described in Patent Document 1 and Patent Document 2, it is necessary to perform operations such as once drying with lumber and aligning the dimensions and then attaching the surface material, which complicates the manufacturing process. Further, in the lumbering process, a considerable amount is cut at the stage of aligning the dimensions, so that the yield is deteriorated. In particular, when only the vicinity of the bark is used to ensure strength, the yield must be considerably low.

  In addition, if there are many lumber parts such as lumbar core plywood, it will behave like “solid” wood, leaving a material with anisotropy such as warping, distorting, twisting and bending. In addition, in the case of infiltrating a reinforcing resin or performing molecular polymerization by irradiating with radiation, the environmental load due to energy input such as heat and ultraviolet rays is large. Furthermore, when a lumber product is used, the plate thickness is inevitably increased, making it difficult to produce a thin plate product.

  The present invention solves the above-described conventional problems, and an object of the present invention is to effectively use the insulator as a building material such as a house or a furniture material.

The wood material using the insulator of the invention according to claim 1 as a raw material is formed by laminating an upper surface layer portion, a middle layer portion, and a lower surface layer portion, and the space between the upper surface layer portion and the lower surface layer portion is oil palm . It is a wooden material composed of only a single plate, made of coconut as a raw material, and the upper surface layer portion and the lower surface layer portion are processed by cutting the oil palm along the trunk periphery, Using a single plate obtained from the radially outer part of the trunk than the single plate used for the middle layer portion, the middle layer portion is formed by cutting the oil palm along the trunk periphery and processing the upper side of the single plate A single plate obtained from a radially inner portion of the trunk is used rather than the single plate used for the surface layer portion and the lower surface layer portion.

The wood material using the insulator of the invention according to claim 2 as a raw material is formed by laminating an upper surface layer portion, a middle layer portion, and a lower surface layer portion, and the space between the upper surface layer portion and the lower surface layer portion is oil palm . It is a wooden material composed of only a single plate, made of coconut as a raw material, and the upper surface layer portion and the lower surface layer portion are processed by cutting the oil palm along the trunk periphery, A single plate having a specific gravity larger than that of the single plate used for the middle layer portion is used, and the upper surface layer portion and the lower surface layer of the single layer processed by cutting the oil palm along the periphery of the trunk. A single plate having a specific gravity smaller than that of the single plate used for the part is used.

The manufacturing method of the wood material which used the insulator of the invention which concerns on Claim 3 as a raw material laminates | stacks an upper surface layer part, an intermediate | middle layer part, and a lower surface layer part, Between the said upper surface layer part and the said lower surface layer part Is a method for manufacturing a wood material made from palm palm , which is composed only of a single sheet of oil palm , the single sheet processing step of processing the single sheet by cutting the oil palm along the trunk periphery, and the processed A single plate separation step of separating a single plate into at least two or more groups according to the radial position of the trunk from which the single plate was obtained, and the separation on the upper surface layer portion and the lower surface layer portion. Among the group, the single plate belonging to the group obtained from the radially outer portion of the trunk than the group to which the single plate used for the middle layer portion belongs, the middle layer portion, among the sorted group, Upper surface layer part and lower surface layer part A single plate laminating step for laminating using a single plate belonging to the group obtained from the radially inner portion of the trunk than a group to which the single plate used belongs, and a single plate adhering step for bonding and integrating the laminated single plates It is characterized by having.

The manufacturing method of the wood material which used the insulator of the invention concerning Claim 4 as a raw material laminates | stacks an upper surface layer part, an intermediate | middle layer part, and a lower surface layer part, Between the said upper surface layer part and the said lower surface layer part Is a method for manufacturing a wood material made from palm palm , which is composed only of a single sheet of oil palm , the single sheet processing step of processing the single sheet by cutting the oil palm along the trunk periphery, and the processed A single plate separation step of separating a single plate into at least two or more groups according to specific gravity, and the upper surface layer portion and the lower surface layer portion include a single plate used for the middle layer portion of the sorted groups. A single plate belonging to a group having a higher specific gravity than the group to which the plate belongs is used, and the middle layer portion has a specific gravity higher than that of the group to which the single plate used for the upper surface layer portion and the lower surface layer portion belongs. Belonging to a small group of That a veneer laminating step of laminating using a single plate, and having a veneer bonding step for bonding and integrating the veneer that the laminated.

  In addition, in the said Claim 1 thru | or 4, the upper surface layer part, the middle layer part, and the lower surface layer part may each be comprised by one single plate, and are comprised by the several single plate. Also good.

  In the invention according to claim 1, in the upper surface layer portion and the lower surface layer portion, the radial direction of the trunk of the single plate used for the middle layer portion of the single plate processed by cutting the insulator along the periphery of the trunk. A single plate obtained from the outer part is used. Moreover, in the middle layer portion, the single plate obtained from the radially inner part of the trunk than the single plate used for the upper surface layer portion and the lower surface layer portion among the single plates processed by cutting the insulator along the trunk periphery Is used. By laminating the upper surface layer portion, the middle layer portion, and the lower surface layer portion in this way, a single plate with high strength is arranged in the surface layer portion where the bending moment acts most, and a single plate with low strength is arranged in the middle layer portion. can do. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material, and intensity | strength can be pulled out effectively.

  In the second aspect of the invention, the upper surface layer portion and the lower surface layer portion are made of a single plate having a specific gravity larger than that of the single plate used for the middle layer portion among the single plates processed by cutting the insulator along the trunk periphery. A board is used. Moreover, the single layer with a specific gravity smaller than the single plate used for an upper surface layer part and a lower surface layer part is used for the middle layer part among the single plates which cut and processed the insulator along the trunk periphery. By laminating the upper surface layer portion, the middle layer portion, and the lower surface layer portion in this way, a single plate with high strength is arranged in the surface layer portion where the bending moment acts most, and a single plate with low strength is arranged in the middle layer portion. can do. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material, and intensity | strength can be pulled out effectively.

In the manufacturing method of the wooden material which used the insulator of the invention of Claim 3 as a raw material, a single board is processed by cutting an insulator along a trunk periphery in a single board processing process.
Next, in the single plate sorting step, the processed single plates are sorted into at least two groups according to the radial position of the trunk from which the single plate was obtained. Since the insulator is stronger in the vicinity of the bark than in the vicinity of the center, the single plates having different strengths can be grouped in order by the single plate separation process.
Next, in the single plate laminating step, the upper surface layer portion and the lower surface layer portion are separated into a single group belonging to a group obtained from the radially outer portion of the trunk of the group to which the single plate used for the middle layer portion belongs. Use a single plate belonging to the group obtained from the radially inner part of the trunk than the group to which the single plate used for the upper surface layer portion and the lower surface layer portion belongs, among the separated groups, using the plate Laminate. In the single plate bonding step, the stacked single plates are bonded and integrated.
Thereby, a single plate with high strength can be arranged in the upper surface layer portion and the lower surface layer portion where the bending moment acts, and a single plate with low strength can be arranged in the middle layer portion. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material, and intensity | strength can be pulled out effectively. Also, in these processes, there is no lumbering process as in the conventional manufacturing process of plywood or LVL, and the yield does not deteriorate.

In the manufacturing method of the wood material which used the insulator of the invention of Claim 4 as a raw material, a single board is processed by cutting an insulator along the trunk periphery in a single board processing process.
Next, in the single plate sorting step, the processed single plates are sorted into at least two groups according to the specific gravity. Since the strength increases as the specific gravity increases, the single plates having different strengths can be grouped in order by the single plate separation step.
Next, in the single plate laminating step, the upper surface layer portion and the lower surface layer portion are divided into groups, and a single plate belonging to a group having a higher specific gravity than the group to which the single plate used for the middle layer portion belongs is used. Are stacked using a single plate belonging to a group having a specific gravity smaller than a group to which a single plate used for the upper surface layer portion and the lower surface layer portion belongs. In the single plate bonding step, the stacked single plates are bonded and integrated.
Thereby, a single plate with high strength can be arranged in the upper surface layer portion and the lower surface layer portion where the bending moment acts, and a single plate with low strength can be arranged in the middle layer portion. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material, and intensity | strength can be pulled out effectively. Also, in these processes, there is no lumbering process as in the conventional manufacturing process of plywood or LVL, and the yield does not deteriorate.

As described above, according to the present invention, the insulator material can be effectively used as a building material such as a house or a furniture material.
The obtained wood material has extremely small anisotropy such as warping, madness, twisting and bending. In addition, the environmental load due to the use of resin and the input of energy such as heat and ultraviolet rays is small. Moreover, it is easy to manufacture a thin plate product.

  Next, with reference to FIG. 1 thru | or FIG. 3, the wooden material which used the insulator concerning Embodiment 1 of this invention as a raw material, and its manufacturing method are demonstrated. FIG. 1 is a cross-sectional view showing a wood material 10 according to Embodiment 1, and FIG. 2 is a perspective view showing a cross-section of a tree trunk of an insulator 50 as a raw material. Moreover, FIG. 3 is process drawing which shows the manufacturing method of the wooden material 10 which used the insulator concerning Embodiment 1 as a raw material.

As shown in FIG. 1, the wood material 10 has a structure in which five single plates are laminated (5 plies). The wood material 10 may be a plywood or LVL (single plate laminate).
The laminated structure 10 will be described in detail. The wood material 10 includes an upper surface layer portion 11, a middle layer portion 12, and a lower surface layer portion 13. Further, the middle layer portion 12 is composed of three single plates 12a, 12b, and 12c. The upper surface layer portion 11 and the lower surface layer portion 13 are each composed of a single plate.

As a raw material of the wood material 10, a tree trunk of an insulator 50 as shown in FIG. 2 is used. The insulator 50 includes a first part 51 located near the bark (radially outside the trunk) and a second part 52 located near the center (diameter inside the trunk). Here, the portion of the second portion 52 has a low strength and is brittle compared to the portion of the first portion 51.
As will be described later, the insulator 50 is cut along the periphery of the trunk to be processed into a single plate. The single plate obtained from the first portion 51 and the single plate obtained from the second portion 52 When the specific gravity after drying is compared, the single plate obtained from the portion of the first portion 51 has a higher specific gravity (a higher density) and higher strength.

  In FIG. 2, the boundary between the first part 51 and the second part 52 is clearly shown. However, in practice, the strength gradually decreases from the vicinity of the bark to the vicinity of the center and becomes brittle. Therefore, a boundary between the first part 51 and the second part 52 is determined in advance.

  The palm material having such properties has been often discarded without using the trunk until now. Therefore, it is possible to effectively use it as a resource by manufacturing the wood material using the palm material.

  In addition, there are various types of palm such as “sago palm”, “oil palm”, “date palm”, “coco palm”, and any palm may be used. Among them, oil palm is extracted from the raw material of biodiesel fuel, so the amount of cultivation has increased rapidly in recent years, and there is a concern that the amount of discarded trunks will increase. Is preferable.

  As the upper surface layer portion 11 and the lower surface layer portion 13 of the wood material 10, a single plate obtained from the portion of the first portion 51 in the insulator 50 in FIG. On the other hand, a single plate obtained from the portion of the second portion 52 of the insulator 50 is used for the middle layer portion 12. In other words, in the upper surface layer portion 11 and the lower surface layer portion 13, among the single plates processed by cutting the insulator 50 along the periphery of the trunk, from the radially outer portion of the trunk than the single plate used for the middle layer portion 12. The obtained single plate is used, and for the middle layer portion 12, a single plate obtained from the radially inner portion of the trunk than the single plate used for the upper surface layer portion 11 and the lower surface layer portion 13 is used. As a result, the specific gravity of the single plate used for the upper surface layer portion 11 and the lower surface layer portion 13 is larger than the specific gravity of the single plate used for the middle layer portion 12.

Next, the manufacturing method of the wooden material 10 which used the insulator concerning Embodiment 1 as a raw material is demonstrated.
As shown in FIG. 3, the manufacturing method of the wood material 10 according to the first embodiment includes a single plate processing step 100, a single plate sorting step 200, a single plate lamination step 300, and a single plate bonding step 400.

  First, the trunks of the palm 50 are cut in advance at regular intervals, and softened by means of steaming or the like. Then, when sufficiently softened, in a single plate processing step 100, a single plate having a thickness of 1 to 3 mm is manufactured by cutting along the trunk periphery of the insulator 50 by a single plate manufacturing apparatus such as a rotary race. The obtained veneer is generally dried to a moisture content of about 10%, cut into appropriate dimensions, and necessary repairs are performed. In addition, you may perform the drying of a single plate, cutting, repair, etc. after the following single plate separation process 200. FIG.

Next, in the single plate sorting step 200, the processed single plates are sorted into two groups. As the classification standard, the radial position of the trunk from which the veneer is obtained is used. That is, it is classified into a single plate obtained from the vicinity of the bark of the trunk of the palm 50 (radially outer side) and a single plate obtained from the vicinity of the center (radially inner side).
In this embodiment, the tree trunk of the insulator 50 is divided into the first part 51 and the second part 52, and the veneer obtained from the first part 51 is taken as the first group and obtained from the second part 52. The veneer is the second group.

  Moreover, if it is after drying, you may use specific gravity as a reference | standard of classification. That is, a specific gravity threshold value is set in advance, and a single plate having a specific gravity larger than the threshold value is set as a first group, and a single plate having a specific gravity smaller than the threshold value is set as a second group. The specific gravity of the single plate obtained from the first portion 51 is larger than the specific gravity of the single plate obtained from the second portion 52.

Next, in the single plate lamination step 300, the separated single plates are laminated. In the lamination, single plates belonging to the first group are arranged on the upper surface layer portion 11 and the lower surface layer portion 13, and single plates belonging to the second group are arranged on the middle layer portion 12.
As a result, the upper surface layer portion 11 and the lower surface layer portion 13 are arranged with a single plate obtained from the radially outer portion of the trunk rather than the single plate used for the middle layer portion 12 (the upper layer portion 12 has an upper A veneer obtained from the radially inner portion of the trunk is arranged with respect to the veneer used for the surface layer portion 11 and the lower surface layer portion 13).
Similarly, the upper surface layer portion 11 and the lower surface layer portion 13 are arranged with a single plate having a specific gravity larger than that of the single plate used for the middle layer portion 12 (the upper surface layer portion 11 and the lower surface layer are disposed in the middle layer portion 12). A single plate having a specific gravity smaller than that of the single plate used for the portion 13 is disposed).

Next, in the single plate bonding step 400, an adhesive is applied to the laminated single plates to bond and integrate them.
The wood material 10 is completed through the above steps.

  As described above, in the wood material 10 according to the first embodiment, the upper surface layer portion 11 and the lower surface layer portion 13 are formed on the middle layer portion 12 of the single plates obtained by cutting the insulator 50 along the trunk periphery. A veneer obtained from the radially outer part of the trunk is used rather than the veneer used. The middle layer portion 12 is obtained from a radially inner portion of the trunk of the single plate used for the upper surface layer portion 11 and the lower surface layer portion 13 among the single plates obtained by cutting the insulator 50 along the periphery of the trunk. A single plate is used. By laminating the upper surface layer portion 11, the middle layer portion 12 and the lower surface layer portion 13 in this way, a single plate having a high strength is arranged on the surface layer portions 11 and 13 where the bending moment acts most, and a single layer having a low strength is provided. A plate can be placed in the middle layer portion 12. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material 10, and intensity | strength can be pulled out effectively.

  Similarly, in the wood material 10 according to the first embodiment, the upper surface layer portion 11 and the lower surface layer portion 13 are used for the middle layer portion 12 of the single plates obtained by cutting the insulator 50 along the trunk periphery. A single plate having a specific gravity larger than that of the single plate is used. The middle layer portion 12 is made of a single plate having a specific gravity smaller than that of the single plate used for the upper surface layer portion 11 and the lower surface layer portion 13 among the single plates obtained by cutting the insulator 50 along the trunk periphery. Yes. By laminating the upper surface layer portion 11, the middle layer portion 12 and the lower surface layer portion 13 in this way, a single plate having a high strength is arranged on the surface layer portions 11 and 13 where the bending moment acts most, and a single layer having a low strength is provided. A plate can be placed in the middle layer portion 12. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material 10, and intensity | strength can be pulled out effectively.

Moreover, in the manufacturing method of the wooden material 10 which used the insulator as the raw material which concerns on Embodiment 1, the single board is processed by cutting the insulator 50 along the trunk periphery at the single board processing step 100.
Next, in the single plate sorting step 200, the processed single plates are sorted into two groups according to the radial position of the trunk from which the single plate was obtained. Since the insulator 50 has higher strength near the bark than near the center, the insulator 50 can be grouped into single plates having different strengths by the single plate separation step 200.
Next, in the single plate laminating step 300, the upper surface layer portion 11 and the lower surface layer portion 13 are radially separated from the group outside the group to which the single plate used for the middle layer portion 12 belongs (second group) among the sorted groups. The single plate belonging to the group (first group) obtained from the part is used, and in the middle layer portion, the group (first group) to which the single plate used for the upper surface layer portion and the lower surface layer portion belongs among the sorted groups. Are laminated using a single plate belonging to a group (second group) obtained from the radially inner portion of the trunk. In the single plate bonding step 400, the stacked single plates are bonded and integrated.
Thereby, a single plate with high strength can be arranged on the upper surface layer portion 11 and the lower surface layer portion 13 on which the bending moment acts, and a single plate with low strength can be arranged on the middle layer portion 12. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material 10, and intensity | strength can be pulled out effectively. Also, in these processes, there is no lumbering process as in the conventional manufacturing process of plywood or LVL, and the yield does not deteriorate.

Similarly, in the manufacturing method of the wooden material 10 using the insulator as the raw material according to the first embodiment, in the single plate processing step 100, the single plate is processed by cutting the insulator 50 along the periphery of the trunk.
Next, in the single plate sorting step 200, the processed single plates are sorted into two groups according to the specific gravity. Since the strength is higher as the specific gravity is larger, the single plate separation process 200 can be used to group into single plates having different strengths.
Next, in the single plate laminating step 300, the upper surface layer portion 11 and the lower surface layer portion 13 are divided into groups having a higher specific gravity than the group (second group) to which the single plate used for the middle layer portion 12 belongs. A single plate belonging to the first group) is used, and the middle layer portion 12 has a lower specific gravity than the group (first group) to which the single plate used for the upper surface layer portion 11 and the lower surface layer portion 13 belongs among the sorted groups. Lamination is performed using single plates belonging to a group (second group). In the single plate bonding step 400, the stacked single plates are bonded and integrated.
Thereby, a single plate with high strength can be arranged on the upper surface layer portion 11 and the lower surface layer portion 13 on which the bending moment acts, and a single plate with low strength can be arranged on the middle layer portion 12. And the unevenness | strength of intensity | strength can be eliminated as the whole wooden material 10, and intensity | strength can be pulled out effectively. Also, in these processes, there is no lumbering process as in the conventional manufacturing process of plywood or LVL, and the yield does not deteriorate.

  In addition, in order to maintain the efficient production of the fruit part, the trunk part of the coconut tree has been cut and renewed after a certain period of time in order to maintain efficient production of the fruit part. Therefore, it is necessary to replant trees, and as a result, there is a problem with the treatment of the felled trunk portions that occur in large quantities. By using the trunk portion as a wood material as in the present embodiment, this problem can be solved and the wood material can be supplied stably.

  In the first embodiment, the upper surface layer portion 11 and the lower surface layer portion 13 are composed of one single plate, and the middle layer portion 12 is composed of three single plates, but the upper surface layer portion, the middle layer portion, The number of single plates constituting the side surface layer portion is not particularly limited, and the upper surface layer portion, the middle layer portion, and the lower surface layer portion may each be composed of one single plate, or a plurality of single plates. It may be comprised.

For example, a configuration like the wood material 20 according to another embodiment shown in FIG. 4 may be used.
The wood material 20 has a structure in which seven single plates are laminated (7 plies). The laminated structure 20 will be described in detail. The wood material 20 includes an upper surface layer portion 21, an intermediate layer portion 22, and a lower surface layer portion 23. Furthermore, the upper surface layer portion 21 is composed of three single plates 21a, 21b, and 21c, and the lower surface layer portion 23 is composed of three single plates 23a, 23b, and 23c. The middle layer portion 22 is composed of a single plate.

Here, the upper surface layer portion 21 is composed of three single plates 21 a, 21 b, and 21 c, but the condition that the upper surface layer portion 21 is a single plate obtained from a radially outer portion than the middle layer portion 22, or from the middle layer portion 22. As long as the condition that the specific gravity is large is satisfied, the mutual position of the three single plates of the upper surface layer portion 21 is not limited. Similarly, the lower surface layer portion 23 is composed of three single plates 23 a, 23 b, and 23 c, but it is a condition that the lower surface layer portion 23 is a single plate obtained from a radially outer portion than the middle layer portion 22, or the middle layer portion 22. As long as the condition that the specific gravity is larger than that is satisfied, the mutual position of the three single plates of the lower surface layer portion 23 is not limited.
That is, for the single plates 21a, 21b, and 21c of the upper surface layer portion 21 and the single plates 23a, 23b, and 23c of the lower surface layer portion 23, the single plate belonging to the first group in the first embodiment is used, and the middle layer portion 22 is used. A single plate belonging to the second group in the first embodiment may be used.

  Further, like the wood material 30 according to another embodiment shown in FIG. 5, plate materials 31 and 33 made of raw materials such as wood of a tree type different from the insulator 50 are provided on the front and back surfaces of the wood material 10 manufactured from the insulator 50. You may make it laminate | stack and adhere | attach.

Next, with reference to FIG.6 and FIG.7, the wooden material which used the insulator concerning Embodiment 2 of this invention as a raw material, and its manufacturing method are demonstrated. FIG. 6 is a cross-sectional view showing a wood material 40 according to the second embodiment, and FIG. 7 is a perspective view showing a cross-section of a tree trunk of an insulator 60 as a raw material.
In the single plate separation step 200 of the first embodiment, the single plates obtained from the raw material insulators are separated into two groups, whereas in the second embodiment, the single plates are separated into three groups.

  As shown in FIG. 6, the wood material 40 has a structure in which five single plates are laminated (5 plies). The upper surface layer portion 41, the middle layer portion 42, and the lower surface layer portion 43 are configured. Further, the middle layer portion 42 is composed of three single plates 42a, 42b, and 42c. Each of the upper surface layer portion 41 and the lower surface layer portion 43 is composed of a single plate.

As the raw material of the wood material 40, a tree trunk of a coconut 60 as shown in FIG. 7 is used. The insulator 60 includes a first part 61 located near the bark (radially outside the trunk), a second part 62 located near the middle part, and a third part 63 located near the center (diameter inside the trunk). Become. Here, the strength of each part is in the order of first part 61> second part 62> third part 63.
Moreover, when the magnitude | size of the specific gravity after drying of the obtained veneer is compared, it will be in order of 1st site | part 61> 2nd site | part 62> 3rd site | part 63.

For the upper surface layer portion 41 and the lower surface layer portion 43 of the wood material 40, a single plate obtained from the portion of the first portion 61 in the insulator 60 in FIG. 7 is used. On the other hand, a single plate obtained from the portion of the second portion 62 is used for the single plates 42 a and 42 c in the middle layer portion 42. Moreover, the single plate obtained from the part of the 3rd site | part 63 is used for the single plate 42b among the middle layer parts 42. FIG. In other words, in the upper surface layer portion 41 and the lower surface layer portion 43, among the single plates obtained by cutting the insulator 60 along the periphery of the trunk, from the radially outer portion of the trunk than the single plate used for the middle layer portion 42. The obtained single plate is used, and for the middle layer portion 42, a single plate obtained from the radially inner portion of the trunk than the single plate used for the upper surface layer portion 41 and the lower surface layer portion 43 is used. Further, in the three single plates 42a, 42b, 42c of the middle layer portion 42, the portion closer to the surface layer portion (single plate 42a, 42c) is radially outside the trunk than the portion farther from the surface layer portion (single plate 42b). A veneer obtained from the part is used.
As a result, the specific gravity relationship of the single plate used increases as the surface layer portion is approached.

Next, the manufacturing method of the wood material which used the insulator concerning Embodiment 2 as a raw material is demonstrated.
In the same manner as the wood material manufacturing method according to the first embodiment, it is manufactured by the single plate processing step 100, the single plate separation step 200, the single plate lamination step 300, and the single plate bonding step 400. The plate separation process 200 and the single plate lamination process 300 are different.

  In the second embodiment, in the single plate sorting step 200, the processed single plates are sorted into three groups. As the classification standard, the radial position of the trunk from which the veneer is obtained is used. That is, the tree trunk of the palm 60 is divided into a first part 61, a second part 62, and a third part 63, and the veneer obtained from the first part 61 is made into a first group and obtained from the second part 62. A single plate obtained from the third portion 63 is a third group.

  Moreover, if it is after drying, you may use specific gravity as a reference | standard of classification. That is, two specific gravity thresholds are determined in advance, and the first group, the second group, and the third group are set according to the determined threshold values. The specific gravity of the single plate obtained from the first portion 61 is the largest, and the specific gravity of the single plate obtained from the third portion 63 is the smallest.

Next, in the single plate lamination step 300, the separated single plates are laminated. In the lamination, single plates belonging to the first group are arranged on the upper surface layer portion 41 and the lower surface layer portion 43. Next, in the middle layer portion 12, single plates belonging to the second group are arranged on the single plates 42a and 42c, and single plates belonging to the third group are arranged on the single plate 42b.
As a result, the closer to the surface layer part, the veneer from which the radially outer part of the trunk is obtained is arranged (the closer to the surface layer part, the larger veneer is arranged).

  Thus, according to the wooden material 40 using the insulator as the raw material according to Embodiment 2 and the manufacturing method thereof, the veneer obtained from the insulator can be classified more finely according to the strength. And by arrange | positioning so that intensity | strength may become strong, so that it approaches a surface layer part, intensity unevenness can be eliminated as the whole wooden material 40, and intensity | strength can be pulled out more effectively.

  Similarly, also in the wood material 20 shown in FIG. 4, it is possible to extract strength more effectively. For that purpose, the veneer obtained from the insulator of raw material is divided into four groups, the closer to the surface layer part, the veneer from which the radially outer part of the trunk is obtained is arranged (the closer to the surface layer part, A single plate having a large specific gravity is disposed). At this time, the specific gravity relationship in the upper surface layer portion 21 is 21a> 21b> 21c, and the specific gravity relationship in the lower surface layer portion 23 is 23a <23b <23c.

  In addition, by further finely grouping, it is possible to effectively bring out strength even for a plywood having a large number of layers, but the work becomes complicated.

In addition, for example, when it is necessary to form a fruit in the center of the thickness direction of the wood material, the upper surface layer portion and the lower surface layer portion are laminated so that the strength becomes the highest, and if necessary, the central portion It is also possible to laminate a single plate having higher strength than the periphery.
For example, the wood material 70 according to another embodiment shown in FIG. 8 is composed of an upper surface layer portion 71, a middle layer portion 72, and a lower surface layer portion 73. In the upper surface layer portion 71 and the lower surface layer portion 73, Single plates belonging to the first group in the second embodiment having the highest strength are arranged. On the other hand, for the middle layer portion 72, in order to ensure the actual strength, a single plate belonging to the second group having the second highest strength is arranged as the single plate 72b in the central portion, and as the upper and lower single plates 72a, 72c. Single plate belonging to the third group with the lowest strength is placed. Thereby, while ensuring the intensity | strength of an upper and lower surface layer part, real intensity | strength can also be ensured.

In order to ensure the actual strength, a veneer made of wood of a tree species different from that of the palm may be disposed in the central portion.
For example, the wood material 80 according to another embodiment shown in FIG. 9 includes an upper surface layer portion 81, a middle layer portion 82, and a lower surface layer portion 83, and the upper surface layer portion 81 and the lower surface layer portion 83 include Single plates belonging to the first group in the second embodiment having the highest strength are arranged. On the other hand, for the middle layer portion 82, in order to ensure the actual strength, a single plate (having a higher strength than the insulator) made of wood of a tree species different from the insulator is disposed as the single plate 84 in the central portion. As the upper and lower single plates 82a and 82c, single plates belonging to the second group or the third group are arranged. Thereby, while ensuring the intensity | strength of an upper and lower surface layer part, real intensity | strength can also be ensured.

  Depending on the total number of single plates to be stacked, the number of single plates arranged in the central portion may be increased as necessary to increase the strength of the actual part.

As mentioned above, according to the said embodiment, a insulator material can be effectively utilized as building materials, such as a house, and the material of furniture.
The obtained wood material has extremely small anisotropy such as warping, madness, twisting and bending. In addition, the environmental load due to the use of resin and the input of energy such as heat and ultraviolet rays is small. Moreover, it is easy to manufacture a thin plate product.

In this embodiment, the insulator is used as the material of the wood material, but any other material that is brittle and has low strength near the center of the trunk can be applied. For example, it is known that some south-seawood materials have a brittle core material that is a brittle part with low strength at the center, and can be widely applied to wood having such a brittle material.
However, it is very effective to apply to insulators from the viewpoint of securing as raw materials and waste material treatment.

It is sectional drawing which shows the wooden material which used the insulator concerning Embodiment 1 of this invention as a raw material. It is a perspective view which shows the cross section of the coconut tree trunk used as raw material in Embodiment 1. FIG. It is process drawing which shows the manufacturing method of the wooden material which used the insulator as the raw material. It is sectional drawing which shows the wooden material which used the insulator concerning other embodiment as a raw material. It is sectional drawing which shows the wooden material which used the insulator concerning other embodiment as a raw material. It is sectional drawing which shows the wooden material which used the insulator concerning Embodiment 2 of this invention as a raw material. It is a perspective view which shows the cross section of the palm trunk used as raw material in Embodiment 2. FIG. It is sectional drawing which shows the wooden material which used the insulator concerning other embodiment as a raw material. It is sectional drawing which shows the wooden material which used the insulator concerning other embodiment as a raw material.

Explanation of symbols

10 Wood material 11 Upper surface layer portion 12 Middle layer portion 12a Single plate 12b Single plate 12c Single plate 13 Lower surface layer portion 20 Wood material 21 Upper surface layer portion 21a Single plate 21b Single plate 21c Single plate 22 Middle layer portion 23 Lower surface layer portion 23a Single Plate 23b Single plate 23c Single plate 30 Wood material 31 Plate material 33 Plate material 40 Wood material 41 Upper surface layer portion 42 Middle layer portion 42a Single plate 42b Single plate 42c Single plate 43 Lower surface layer portion 50 Insulator 51 First portion 52 Second portion 60 Insulator 61 1st part 62 2nd part 63 3rd part 70 Wood material 71 Upper surface layer part 72 Middle layer part 72a Single board 72b Single board 72c Single board 73 Lower surface layer part 80 Wood material 81 Upper surface layer part 82 Middle layer part 82a Single board 82c Single plate 83 Lower surface layer portion 84 Single plate 100 Single plate processing step 200 Single plate separation step 300 Single plate lamination step 400 Single plate bonding step

Claims (4)

An upper surface layer portion, a middle layer portion, and a lower surface layer portion are laminated, and the space between the upper surface layer portion and the lower surface layer portion is composed of only a single plate of oil palm, and is made of a wooden material made from palm. There,
The upper surface layer portion and the lower surface layer portion were obtained from the radial outer portion of the trunk of the single plate used for the middle layer portion of the single plate obtained by cutting the oil palm along the trunk periphery. Using a single plate,
The middle layer portion was obtained from the radial inner portion of the trunk of the single plate used for the upper surface layer portion and the lower surface layer portion among the single plates processed by cutting the oil palm along the trunk periphery. A wood-based material made from coconut, which is characterized by using a single plate. An upper surface layer portion, a middle layer portion, and a lower surface layer portion are laminated, and the space between the upper surface layer portion and the lower surface layer portion is composed of only a single plate of oil palm, and is made of a wooden material made from palm. There,
For the upper surface layer portion and the lower surface layer portion, among the single plates processed by cutting the oil palm along the trunk periphery, a single plate having a larger specific gravity than the single plate used for the middle layer portion is used,
For the middle layer portion, a single plate having a specific gravity smaller than that of the single plate used for the upper surface layer portion and the lower surface layer portion among the single plates processed by cutting the oil palm along the trunk periphery is used. A wooden material made from the characteristic eggplant. An upper surface layer portion, a middle layer portion, and a lower surface layer portion are laminated, and the space between the upper surface layer portion and the lower surface layer portion is composed only of a single sheet of oil palm , made of a wooden material made from palm A manufacturing method comprising:
A veneer processing step of cutting the oil palm along the trunk periphery to process a veneer,
A single plate sorting step of sorting the processed veneer into at least two or more groups according to the radial position of the trunk from which the veneer was obtained,
In the upper surface layer portion and the lower surface layer portion, a single plate belonging to a group obtained from a radially outer portion of the trunk than a group to which a single plate used for the middle layer portion belongs is used among the sorted groups. In the middle layer portion, among the sorted groups, a single plate belonging to a group obtained from a radially inner portion of the trunk than a group to which a single plate used for the upper surface layer portion and the lower surface layer portion belongs A single plate laminating step for laminating using,
A method for producing a wood material using an insulator as a raw material, comprising: a single plate bonding step for bonding and integrating the laminated single plates. An upper surface layer portion, a middle layer portion, and a lower surface layer portion are laminated, and the space between the upper surface layer portion and the lower surface layer portion is composed only of a single sheet of oil palm , made of a wooden material made from palm A manufacturing method comprising:
A veneer processing step of cutting the oil palm along the trunk periphery to process a veneer,
A single plate separation step of separating the processed single plate into at least two or more groups according to specific gravity;
In the upper surface layer portion and the lower surface layer portion, among the sorted groups, a single plate belonging to a group having a higher specific gravity than a group to which the single plate used for the middle layer portion belongs, the middle layer portion, the Among the separated groups, a single plate laminating step of laminating using a single plate belonging to a group having a specific gravity smaller than the group to which the single plate used for the upper surface layer portion and the lower surface layer portion belongs,
A method for producing a wood material using an insulator as a raw material, comprising: a single plate bonding step for bonding and integrating the laminated single plates.

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