JP2022074284A - Orthogonal integration plate for furniture-fitting and manufacturing method thereof - Google Patents

Abstract

To provide an orthogonal integration plate for a furniture-fitting capable of weight saving while securing an advantage of hardness of a broad leaf tree.SOLUTION: An inside ply 20 is constituted by laminating-adhering between two outside plies 10 by making a fiber direction mutually orthogonal, and the outside ply is constituted by juxtaposing or adhering a lamina or a small square bar of a broad leaf tree mutually in parallel in its fiber direction, and an inside ply is constituted of Japanese cedar or cypress, and a plate thickness of the inside ply is a dimension within a range of 12 mm-14 mm, and a plate thickness of the outside ply is a dimension within a range of 2.4 mm-2.6 mm or a dimension within a range of 3.9 mm-4.1 mm or the plate thickness of the inside ply is a dimension within a range of 15 mm-17 mm, and the plate thickness of the outside ply is a dimension within a range of 3.4 mm-4.6 mm.SELECTED DRAWING: Figure 1

Description

There is an application for exception of loss of novelty

The present invention relates to an orthogonal laminated board for furniture and fittings and a method for manufacturing the same, and particularly to a laminated board capable of realizing weight reduction while ensuring the advantage of hardness of hardwood and a method for manufacturing the same.

For example, there are statistics that about 40% of the privately owned forests in Hyogo prefecture are broad-leaved forests, and about 40% of the broad-leaved forests are oak and oak. Among broad-leaved trees, chestnuts, tamo, zelkova, quercus crispula, etc. are widely used as raw materials for wood, but they require a long time to grow and it is necessary to use old trees, so they are abundant resources in Japan. However, it relied exclusively on imports.
On the other hand, among broad-leaved trees, oak and oak are fast-growing and abundant as resources, and can be used in large quantities like cedar and cypress.
In addition, chestnuts are abundant only in small-diameter trees.

Further, a technique has been proposed in which wood is dried at a low temperature at a temperature in the range of 30 ° C to 50 ° C without warping, distortion, or discoloration (Patent Document 1). Even if Quercus serrata and Quercus acutissima were dried, they were warped and twisted, making it difficult to use as a plate material, and they were only used as firewood and shiitake mushrooms (Patent Document 2).

Recently, the demand for firewood and oak trees has decreased, and the satoyama has been left unmaintained, and even when producing oak trees, large trees 60 to 80 years old are cut and their branches are used for the oak trees. There was a need to develop applications for hardwoods such as oak, oak, and chestnut.

The applicant applies a crude lumber from Konara or Kunugi, which is then dried at a temperature in the range of 35 ° C to 60 ° C at a low temperature until the water content is in the range of 15% to 20%, and is a light-shielding moisture-proof sheet. After covering with and curing, low-temperature re-drying is performed at a temperature within the range of 35 ° C to 60 ° C until the water content reaches 10% or less, and the low-temperature re-dried base plate material is used as a flooring material with a finishing width and finishing thickness. We have come up with a proposal for a manufacturing method that is designed to be finished in the above (Patent Document 3).

By the way, it has been proposed to use CLT (Cross Laminated Timber) having high strength for floor materials and wall materials of building structures (Patent Document 4).

Japanese Unexamined Patent Publication No. 09-318251 Japanese Unexamined Patent Publication No. 07-327486 Japanese Patent No. 6486296 Japanese Unexamined Patent Publication No. 2019-167708

If hardwoods such as oak, oak or chestnut can be used for furniture and fittings, the use of hardwoods will be expanded, but oak, oak and chestnut are harder and heavier than cedar and hinoki, and can be used for furniture and fittings. Difficult to use. Recently, DIY, in which non-experts (amateur) process materials by themselves to make furniture and fittings, has become widespread, but hardwoods are hard and heavy, so it is difficult for amateurs to handle.

In view of this point, it is an object of the present invention to provide an orthogonal laminated board for furniture and fittings which can realize weight reduction while ensuring the advantage of hardness of hardwood.

Therefore, the orthogonal laminated board for furniture and fittings according to the present invention is configured by laminating and adhering the inner plies between the two outer plies with the fiber directions orthogonal to each other, and the above two outer plies are made of broad-leaved lumber. The inner ply is made of cedar or glulam, while the plate or small square lumber is composed of the fiber directions arranged parallel to each other or bonded to each other, and the outer ply and the inner ply have a thickness of 12 mm. Dimensions in the range of ~ 14 mm, outer plies in the range of 2.4 mm to 2.6 mm, dimensions in the range of 3.9 mm to 4.1 mm, or inner plies in the range of 15 mm to 17 mm. It is characterized in that the outer ply has a dimension within the range of 3.4 mm to 4.6 mm.

One of the features of the present invention is to form a CLT by making two outer plies and inner plies orthogonal to each other in the fiber direction, and the two outer plies are made of broad-leaved sawn board or small square lumber, and the inner plies are made of cedar or cypress. It is in the point that I tried to use.

As a result, the weight of the board can be reduced due to the characteristics of sugi or cypress, while the hardness and strength of CLT can be ensured by hardwood.
When the CLT of this case is applied to a door, the weight can be reduced, and as a result, the burden on the hinge is small, and nailing can be easily performed as compared with the case where the inside is hollow.
Furthermore, since the pattern of hardwood appears on the surface, a real feeling can be obtained as compared with plywood and the like, and a beautiful design and a high-quality texture can be obtained.

When the thickness of the orthogonal laminated board (hereinafter, sometimes simply referred to as CLT) is 18 mm, the inner ply has a dimension within the range of 12 mm to 14 mm, and the outer ply has a dimension within the range of 2.4 mm to 2.6 mm. However, if the outer ply has a thickness of more than 2.6 mm, the CLT becomes heavy and hard, which makes it complicated to process with DIY or the like, but if it is less than 2.4 mm, the desired hardness cannot be obtained.

When the CLT plate thickness is 21 mm, the inner ply has a dimension in the range of 12 mm to 14 mm, the outer ply has a dimension in the range of 3.9 mm to 4.1 mm, but the outer ply has a thickness exceeding 4.1 mm. Then, the CLT becomes heavy and hard, and it becomes complicated to process by DIY or the like, but the desired hardness cannot be obtained if it is less than 3.9 mm.

When the CLT plate thickness is 24 mm, the inner ply has a dimension in the range of 15 mm to 17 mm, the outer ply has a dimension in the range of 3.4 mm to 4.6 mm, but the outer ply has a thickness exceeding 4.6 mm. Then, the CLT becomes heavy and hard, and it becomes complicated to process by DIY or the like, but the desired hardness cannot be obtained if it is less than 3.4 mm.

Further, the reason why the outer ply and the inner ply are specified to have the dimensions in the above range is that if the outer ply and the inner ply are out of the range, the CLT may be warped or twisted.

Sugi and cypress may be a single plate, but sugi and cypress may be formed by arranging or adhering the fiber directions of the ground lumber or small square lumber in parallel to each other.

Hardwood milling boards and small lumber can be manufactured as follows. A straight lumber is cut out from the trunk of a broad-leaved tree, and a rough plate larger than the finish width and finish thickness is sawn from the straight lumber. After low-temperature drying until the water content is within the range of The cured base plate is low-temperature re-dried at a temperature within the range of 35 ° C or more and 60 ° C or less until the water content reaches 10% or less, and finally the low-temperature re-dried base plate is used for the finishing width and finishing thickness. Finish on a ground board or small square lumber.

A rough plate with less warpage and twist can be obtained by low-temperature drying at a temperature in the range of 35 ° C to 60 ° C until the moisture content is in the range of 10% to 20%. The water content of the board becomes uniform throughout the rough board, and then it is re-dried at low temperature until the water content reaches 10% or less to obtain a raw board material without warping or twisting. By finishing to a square lumber, a plate material having a higher density and higher wear resistance than beech or teak can be obtained, and the optimum CLT for furniture and fittings can be obtained.

In addition, there is a heather such as a tiger group as a characteristic of oak and oak, and it has a high-class texture equivalent to oak and chestnut, and has excellent design, high nail holding power, and excellent workability.

The straight material is sawn on a rough plate using a band saw trolley and a table saw.

The rough plate and the raw plate material are dried at a low temperature in the range of 35 ° C to 60 ° C using a low temperature dryer. The reason why the temperature is set to 35 ° C or higher is that at a temperature of less than 35 ° C, it takes a long time to dry the rough plate to a moisture content in the range of 10% to 20% or the raw plate material to a moisture content of 10% or less. This is because if the temperature exceeds 60 ° C, the warp or twist may increase due to drying.

Since the inner and outer plies are bonded to each other, the ground board and the small square timber may be arranged in the width direction, but if they are joined in the width direction by, for example, wood grain strips and used for CLT, high strength can be obtained. ..

Further, the method for manufacturing an orthogonal laminated board for furniture and fittings according to the present invention includes a step of cutting a straight lumber from a trunk of a broad-leaved tree, a step of sawing a rough plate larger than the finish width and finish thickness from the straight lumber, and a rough plank. A step of low-temperature drying the board at a temperature in the range of 35 ° C or more and 60 ° C or less until the water content is in the range of more than 10% and 20% or less, and the finishing width and finishing thickness of the low-temperature dried rough board. The process of rough-finishing a larger base plate material, the process of covering the rough-finished base plate material with a light-shielding moisture-proof sheet and curing it, and the process of curing the cured base plate material at a temperature within the range of 35 ° C or more and 60 ° C or less 10 The process of low-temperature re-drying until the water content reaches% or less, the process of finishing the low-temperature re-dried base plate into a ground board or small square lumber with a finishing width and finish thickness, and the process of finishing the ground board or small square lumber with each other in the fiber direction. It is characterized by comprising a step of manufacturing an outer ply by arranging or adhering it in parallel with each other, and a step of sandwiching and adhering an inner ply of a lumber or a lumber between two outer plies.

It is a figure which shows the embodiment of the orthogonal laminated board for furniture and fittings which concerns on this invention. It is a figure which shows an example which applied the orthogonal laminated board of the said embodiment to furniture.

Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 and 2 show preferred embodiments of orthogonal laminated boards for furniture and fittings according to the present invention. In the figure, the CLT 30 of this example is configured by laminating and adhering two outer plies 10 and inner plies 20 with their fiber directions orthogonal to each other.

The two outer plies 10 are made by bonding hardwoods such as konara or chestnut lumber 11 or small square lumber 12 with their fiber directions aligned parallel to each other, and the inner ply 20 is made of sugi or cypress grinder 21 or small. The square lumber 22 is manufactured by arranging the fiber directions parallel to each other and adhering them.

The thickness of the outer ply 10 and the inner ply 20 is a dimension b in the range of 12 mm to 14 mm for the inner ply 20, for example 13 mm, and the outer ply 10 is 2.4 mm to 2.6 mm, for example 2.5 mm or 3.9 mm to. A dimension a within the range of 4.1 mm, for example 4.0 mm, or a dimension b within the range of the inner ply 20 of 15 mm to 17 mm, for example 16 mm, and the outer ply 10 in the range of 3.4 mm to 4.6 mm. The inner dimension a is, for example, 4.0 mm.

When manufacturing CLT30, logging oak or chestnut. Cut the trunk of 28 cm or more at the end at the bend to make a straight material. The lumber is 2m to 4m.

Next, the rough plate is sawn. Saw with a band saw trolley and table saw to be +20 mm wider than the finished width and +5 mm or more than the finished thickness. Use chips for sapwood, mold, stains, and worm-eaten materials. Immediately after sawing, "solid" is applied to prevent the invasion of mold. Also, avoid direct sunlight and avoid exposure to wind and rain so that it will not warp or twist.

In the next step, artificial drying is performed. Put stiles with a thickness of 24 mm or more in a low-temperature dryer at a pitch of 60 cm or less, lay slabs with a gap of 1 cm or more in the width direction, and stack them at a temperature within the range of 35 ° C to 60 ° C. Dry at low temperature until the moisture content is in the range of more than% and 20% or less. The drying time varies depending on the moisture content of the rough plate. If the water content of the rough plate is high, a long time is required.

Next, the defects of the low-temperature dried rough plate are removed. First, roughen the plane so that it is +10 mm from the finished width and +4 mm from the finished thickness. After that, defects such as worm-eaten, cracked, mold, bent, and bent knots are removed with a cut and sew, and the raw plate material is used.

Finger processing is performed on the obtained raw plate material. Finger processing uses a finger shaver to form fingers on the opposite end faces of the substrate. After the finger processing is completed, the base plate is bonded in the longitudinal direction with an adhesive, for example, an aqueous vinyl chloride adhesive, and then cut to a required length. When bonding, press with a pressure adjusted to prevent pinholes.

Next, storage and curing are performed. A stile with a thickness of 24 mm or more is put in a stile at a pitch of 60 cm or less, and the stile is piled up. By this curing, the water content of the base plate material becomes uniform throughout the base plate material. The storage / curing time is until the product is ordered, but long-term storage / curing is preferable for quality stability.

When an order is received, it will be re-dried. Put stiles with a thickness of 24 mm or more in a low-temperature dryer at a pitch of 60 cm or less, lay slabs with a gap of 1 cm or more in the width direction, and stack them at a temperature within the range of 35 ° C to 60 ° C. Re-dry at low temperature until the moisture content is less than%. As a result, a base plate material of stable quality with less warpage and twist can be obtained.

After low temperature re-drying, pre-processing is performed. That is, using a moulder, crushing is performed to produce a slab or small square lumber, and a wood grain is processed using a moulder, and a groove is formed on one side of the slab or small square. At the same time, end match processing is performed with a double end tenor, repairs such as knots and cracks with putty and adhesive, and finished with a wide sander to a roughness of # 240.

After that, it is put on a press machine, bonded with an adhesive, for example, an aqueous vinyl chloride adhesive, molded to the required dimensions, squeezed 0.5 mm larger than the finished dimensions with a planar, and # 240 roughness with a wide sander. Finish to manufacture a laminated board.

10 outer ply 20 inner ply

Claims (3)

The inner ply (20) is laminated and bonded between the two outer plies (10) with the fiber directions orthogonal to each other.
The two outer plies (10) are composed of hardwood sawn boards or small square lumbers whose fiber directions are arranged parallel to each other or adhered to each other.
The inner ply is made of sugi or cypress, and the thickness of the outer ply and the inner ply is within the range of 12 mm to 14 mm for the inner ply and 2.4 mm to 2.6 mm for the outer ply. Or the dimensions are in the range of 3.9 mm to 4.1 mm, or the inner plies are in the range of 15 mm to 17 mm and the outer plies are in the range of 3.4 mm to 4.6 mm. Orthogonal laminated board for furniture and fittings characterized by being. The orthogonal laminated board for furniture and fittings according to claim 1, wherein the inner ply (20) is formed by arranging or adhering sugi or cypress on a ground board or small square timber in parallel with each other in the fiber direction. The process of cutting out direct wood from the trunk of hardwood,
The process of sawing rough plates larger than the finished width and thickness from straight lumber,
A step of low-temperature drying the rough plate at a temperature in the range of 35 ° C or more and 60 ° C or less until the moisture content is in the range of more than 10% and 20% or less.
The process of rough finishing a low-temperature dried rough plate into a base plate material larger than the finish width and finish thickness,
The process of covering the rough-finished base plate with a light-shielding moisture-proof sheet and curing it,
A step of low-temperature re-drying the cured raw plate material at a temperature within the range of 35 ° C or higher and 60 ° C or lower until the moisture content reaches 10% or lower.
The process of finishing a low-temperature re-dried raw plate into a ground lumber or small square lumber with a finishing width and finishing thickness.
The process of making an outer ply by arranging or adhering a sawn board or small square lumber in parallel with each other in the fiber direction.
The process of putting the inner ply of Sugi or Japanese cypress between the two outer plies and putting it on the back,
A method of manufacturing orthogonal laminated boards for furniture and fittings, which is characterized by being equipped with.

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