JP2004314575A - Solid material-laminated plywood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid material-laminated plywood with good handleability like a usual plywood in which the handleability is improved by suppressing the distortion of solid materials due to warping or expansion/contraction while keeping the natural texture thereof. <P>SOLUTION: The wide and tough solid material-laminated plywood having good natural texture is produced by thinning the solid material to suppress its distortion, putting the thinned materials in a required width and laminating and bonding them. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a laminated plywood made of a solid material in which a thin and thin solid board is adhered to a laminate to form a large plate to take advantage of the solidity and to simplify the construction.
[0002]
[Prior art]
To enjoy the goodness of wood using solid wood for floors, walls, ceilings, furniture, etc., you have to ask a craftsman for the construction. Of course it will be expensive.
The use of plywood or veneer makes it difficult to maintain a good condition for a long time, even if the construction is easy.
Over the years, it is said that it is not good to say that it is made of veneer, but it breaks with a little force, as it is synonymous with.
[Problems to be solved by the invention]
It would be good if we could make a board that combines the goodness of solid wood and the goodness of plywood construction. Speaking of laminated plywood, it becomes veneer, but is made by bonding veneers.
The veneer is a thin plate made by cutting with a blade so that the logs are peeled continuously toward the core like a wig, and at this time, regardless of the tree structure or fiber, The force of bending the board finely parallel to the grain at the angle of the blade works, and the fibers and tissues are divided, and the tenacity characteristic of wood is lost.
This is the main reason why the plywood is easily broken.
This is also due to the fact that the surface becomes fuzzy and sparse over time. The same applies to veneer decorative plywood in which a veneer that has been cut in the same direction as the grain of the wood with a blade and thinned like a shaving is adhered to plywood or the like.
The act of sharpening with a blade results in a state in which the fiber or tissue of the tree is bent at the angle of the cutting edge, so that a substantial part is broken finely.
Wood grain (summer eyes are soft and winter eyes are firm and dark) is a non-uniform appearance of the material, and it is also a characteristic of wood that it is not concentric. Become.
Therefore, the veneer is easily broken, the plywood is easily broken or broken, and the wood and the original strength are not maintained.
Since the power to expand and contract in the state of veneer and the force that easily goes out of order are divided, even if it becomes plywood, it does not go out of order, but the stickiness of the tree is gone.
For example, the strength of a 6 mm thick plywood plate and a 6 mm thick plate of two solid 3 mm plates are completely different in strength.
Here is the goodness of innocence that the smoothness of the bark is also different. Due to these differences, "Veneer-making", which will become obvious over the years, is recognized as a pronoun although it is not good.
The best feature of the wood material is that it is not uniform like metal, it is a living thing, and it has a mixture of Natsume and Winter eyes with different expansion and contraction, and it constantly expands and contracts due to moisture. They manifest as warpage, bending, stretching in width.
[0004]
On the other hand, the goodness of innocence is that it is durable and durable, and the skin is clean and smooth forever.
Placing solid wood on the floor or wall, etc. is very easy to use, even if you know that it is very good, because there are concerns that the tree may go crazy after construction and it may be ugly or there may be gaps Yes.
Narrow boards must be neatly arranged without gaps. If tree expansion and contraction are also taken into consideration, there will be problems such as later swelling due to moisture and swelling or drying to form gaps.
Since the expansion and contraction of the tree is unavoidable, the fittings are not connected, and the tongue and groove are processed.
The construction will be done by experts. Of course it becomes expensive.
[0005]
[Means for Solving the Problems]
In order to be able to handle the goodness of the solid wood as it is, like veneer, it is easy to handle it like a plywood with a solid, easy-to-install size, and like a solid wood Don't go crazy.
The condition for stopping the warpage and expansion and contraction of wood can be achieved by bonding thin boards as seen in plywood.
Actually, it is possible to prepare a product that is solid, has a plate thickness of 1 mm or more, has an appropriate width, is arranged in the size of plywood, and is laminated and bonded. At this time, the boards have different properties depending on whether the grain is parallel or cross-laminated.
Regarding the board width, in order to correct the bending and warping that occurs due to dryness and characteristics, after grinding the logs to take up the pillars after sawing the logs, take the shrinkage and warping of the wood and take into account the bending, then grind it to a larger size than the intended size. Then, it is ground again to the desired size. At this time, a thin plate comes out as waste material.
This board is aligned in width and thickness properly, cut into a predetermined length, and arranged in a size intended for use, and bonded to a laminate.
There is no fixed limit on the thickness or width, so it is natural to use cut off materials that are produced during sawing.
Successful use of thinned wood will also be possible.
One of the reasons why the use of small-diameter trees such as thinned wood does not progress is that small-diameter trees tend to be out of order, and when they are made of raw materials, of course, they cannot maintain high quality even after they become products.
The heartwood, which is the center of the log, is particularly hard, fragile, susceptible, and characterized, with smaller diameter trees being more prominent and therefore avoided.
This problem can be solved by using a thin board. The main causes of the inconsistency are that the structure of the wood is not uniform, the trees have summer and winter eyes, the stretching ratio is different, and the eccentric circle is drawn There is to take a plate-like thing from a log. In addition, wood has a phenomenon called thinning, the surface shrinks due to drying, the inner surface does not shrink at the same speed, the inner surface shrinks with a delay, and it gradually decreases in size over time. .
Sudden loss of eyesight can result in cracks or cracks in the wood. The power is powerful and cannot be stopped easily.
The difference in the expansion and contraction of the back and front of the board appears as warping or bending, the thicker the board, the stronger the warping force is, the thinner the board is weaker, so the stretching force is weaker so that it does not lead to the warping of the board Alternatively, the warp may be maintained with a small force, such as by reducing the width of the board so as not to be affected by expansion and contraction.
In reality, as a guide, if you glue a board with a thickness of about 6 mm or less to a solid thing, the board will almost completely stop expanding and contracting, and you can suppress irregularities.
Since the expansion and contraction of the tree is very slight in the length direction of the tree, it is considered to be in a fixed state, and by stopping the movement in the width direction, the board does not go out of order.
In order to fix the movement in the width direction, it can be done by gluing in the length direction that does not move. At this time, the condition that the thickness of the plate is thin is as described above. The plywood is glued.
At this time, it is important that the thickness of the front and back plates is the same, so that the product is not disordered. Laying an odd number of layers will not be out of order.
[0006]
Also, by bonding this thin plate to an existing solid plate, such as plywood (not very thin, the finished product will warp if it is thin), the plywood looks like a solid plywood (Fig. 2). Become.
Alternatively, a solid board (Fig. 4) can be made by bonding this thin board to a product with a small array of square bars.
Also at this time, this bar is not wide and needs to be sized so that expansion and contraction of the bar does not affect it.
Plywood made of solid wood can be used without inferiority to the veneer (without giving up).
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
By thinning the solid wood so that it does not go crazy, and by lining it up and gluing it to the laminate, it is possible to provide a board that is solid and can be handled and constructed like plywood.
[0008]
The thin solid boards are cut into target lengths and arranged in a required width to form a plate (1). The other one is made of a plate-like object with the vertical and horizontal lengths and widths interchanged, and then glued together, resulting in a plate with the front and back grain crossed (Fig. 1).
The expansion and contraction of the front plate in the width direction is stopped by the one with no vertical expansion and contraction of the back plate.
Also, the sledding is slightly reduced.
An odd number of sheets may be stacked similarly to plywood.
[0009]
There is also a method of bonding a thin solid board (1) to an existing plywood (2) (FIG. 2). If the plywood is thin, gluing this solid board to both sides of the plywood will not warp.
[0010]
When a thin solid plate is glued to a plate-shaped product (4) in which square materials are arranged, a disc (FIG. 4) is obtained. At this time, it is a condition that narrow timbers are arranged.
A plate may be used instead of the square, but it is necessary to stop the expansion and contraction and warp of this plate (5) by making a small cut like a backing (shadow drawing) of the pillar so that the plate is not disturbed.
There is also a method in which a cut is made in the back surface of a slightly thicker plate instead of a thinned solid plate to form a laminate, but there is a risk that cracks may occur in the cut portion and make it hard to see.
By using this notch method, it is possible to construct a single large-diameter solid wood without any inconvenience.
There is also a hand to make a large amount of precious veneer wood with veneer, but considering the life of veneer products, the amount is small, but it is a method that can keep the goodness of solid for a long time.
In order to ensure the goodness and strength of the construction of the round surface, it is sufficient to bond a sheet of paperboard or bamboo that is strong in bending to a plate shape (3) with this solid thin plate and the laminate, and back it. Alternatively, as shown in FIG. 3, the adhesive may be put in the middle part of the lamination.
In addition, even if the grain is laminated in parallel like a parallel plywood, it is possible to obtain a solid plywood with a relatively good bending that suppresses tree expansion and contraction. At this time, it is natural that the seams of the front and back plates do not match.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
If the surface of the floor is damaged in an existing house, you can just put this board on it without replacing it, it can be easily installed on a damaged wall without a waist wall, it is crazy even if it is solid and thick There is nothing you can do. The goodness of innocence is alive and the construction can be done with the feeling of wearing veneer.
The ceiling panel is solid and light, and the construction is nice.
[0013]
If it is of the same thickness, plywood has strength comparable to that of plywood, so it can be replaced by a decorative board or resin board, such as a back plate of high-end furniture, a surface of a round surface, a place where innocence is not allowed by solid features Can be used as
[0014]
The length and width are free while maintaining the innocence's goodness, so it can be finished relatively lightly for special items such as large boxes.
Do-it-yourselfers can also make and finish solid veneers with the feel of veneer.
[Brief description of the drawings]
FIG. 1 is a solid laminated plywood in which a grain of wood is crossed with a solid thin plate and bonded to a laminate.
FIG. 2 is a solid laminated plywood obtained by bonding a solid thin plate to another plywood in a laminated manner.
FIG. 3 shows a solid laminated plywood in which boardboard, bamboo, plywood and the like are inserted into the middle part of the laminate with solid laminated plywood on the front and back, and adhered to the laminate.
FIG. 4 is a solid laminated plywood in which a solid thin plate is adhered to a square bar in a laminate.
FIG. 5 is a solid laminated plywood in which a solid thin plate is bonded to a solid thick plate in a laminate.
FIG. 6 is a solid thin plate having a chamfered edge at both ends of the width of the plate.
DESCRIPTION OF SYMBOLS 1 Solid thin board 2 Plywood 3 Intermediate layer of paperboard, bamboo, plywood, etc. 4 Solid square wood 5 Solid thick board 6 Cut 7 Beveled solid thin board

Claims (1)

Laminated plywood with solid board glued to the laminate

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