JPH06122179A - Carbon fiber reinforced laminated wood material - Google Patents

Abstract

PURPOSE:To provide a lightweight laminated wood material having high rigidity. CONSTITUTION:A carbon fiber reinforced laminated wood material is constituted by providing plate-shaped carbon fiber reinforced resin composite material layers 1 molded by pultrusion on both surfaces of laminated wood materials 2 each formed by laminating wood layers subjected to cutting processing in the fiber direction thereof through an adhesive so that the fiber directions of the wood layers become mutually parallel and providing a flat-shaped carbon fiber reinforced resin composite material layer 1 molded by separate pultrusion so as to connect those composite material layers so that all of the carbon fiber reinforced resin composite material layers 1 become H-shape in a cross-sectional shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon fiber reinforced laminated wood, and more specifically to a wood which is cut in the fiber direction and provided with a carbon fiber reinforced resin composite material layer having an H-shaped cross section. The present invention relates to a carbon fiber reinforced laminated material in which a plurality of fibers are laminated in parallel with each other with an adhesive interposed therebetween.

[0002]

2. Description of the Related Art Laminated wood has been known as a material obtained by laminating lumber or small square wood that has been machined long in the fiber direction of wood with an adhesive so that the fiber directions thereof are parallel to each other. It is mainly used for frame materials such as columns and beams in architecture. Such laminated lumber not only inherits the excellent properties of wood as it is, but also compares the characteristics that cannot be obtained by general lumber products, that is, the size and shape required by laminating lumber and small timber. It can be made freely, and defects such as knots and rot can be removed and dispersed to reduce variations in product strength. It is difficult to cause an error and the bending material can be easily manufactured by using a jig having a curvature.

[0003]

However, such conventional laminated lumber is not suitable for the structural material of a large building, and if the laminated lumber is used for the structural material of a large building, the rigidity of the laminated lumber is increased. Therefore, it is necessary to increase the thickness of the laminated wood, and as a result, there are problems such as the ceiling of the building becoming low, and the height of the building becoming unnecessarily high, and when using structural materials such as steel materials. The weight of the building increases,
There was also a problem that the vibration could be transmitted easily.

[0004]

Therefore, as a result of intensive studies made by the present inventors in order to solve the conventional problems, these problems can be solved by using a laminated material having a specific structure. And has reached the present invention. That is, an object of the present invention is to provide a laminated lumber suitable for a structural material of a large building, and it becomes possible to reduce the amount of natural wood used by the laminated lumber, and also in terms of forest protection. An object is to provide a carbon fiber reinforced laminated wood which is useful.

[0005] The purpose of the laminated wood is to laminate a plurality of woods cut in the fiber direction with the fiber directions parallel to each other via an adhesive, and to one surface and the surface of the laminated wood. A flat plate carbon fiber reinforced resin molded by pultrusion molding is provided on the opposite surfaces, and a flat pultruded carbon fiber reinforced resin is formed so as to connect between the carbon fiber reinforced resin composite material layers. This can be easily achieved by a carbon fiber reinforced laminated material characterized in that a composite material layer is provided and these carbon fiber reinforced resin composite material layers are configured to have an H-shaped cross section.

The present invention will be described in detail below. The wood used in the present invention is not particularly limited as long as it is wood used in conventional laminated wood, and usually, cypress, cedar,
Wood such as Tsuga and spruce is used. And such wood may be used in combination of 2 or more types. Further, the shape of the wood to be used is not particularly limited, and it is usually used in the shape of a sawing board, a small timber, etc., which has been machined long in the fiber direction of wood.

The laminated wood of the present invention is made by laminating a plurality of such woods with the fiber directions thereof being parallel to each other with an adhesive agent. Is about 4 to 5, that is, the total plate thickness is about 10 to 15 cm. Further, in order to stack these woods, an adhesive such as resorcin resin or urea resin is used on the surface of each wood and heated by heating furnace, high frequency heating or the like at 120 to 180 ° C. for about 1 to 10 hours. do it.

A feature of the present invention is to provide a flat carbon fiber reinforced resin composite material layer formed by drawing on one surface of the laminated material and a surface opposite to the surface, and to provide the carbon fiber reinforced resin composite. The plate-like carbon fiber reinforced resin composite material layers formed by separate pultrusion molding are provided so as to connect the material layers, and these plate-like carbon fiber reinforced resin composite material layers are H-shaped in cross-sectional shape. It is configured as follows. As the flat carbon fiber reinforced resin composite material, it is possible to use either a pultrusion sheet having a unidirectional reinforcing fiber direction, a pultrusion sheet having a two-dimensional reinforced fiber direction (cloth), or the like. it can. The pultrusion molding method is a molding method in which various fibers are continuously drawn out, impregnated with a matrix resin, passed through a mold having a desired cross-sectional shape, and shaped, and a long molded product having a uniform cross section is continuously formed. It is a method of molding FRP that can be manufactured in a simple manner. As the carbon fiber to be used, it is important to use a highly elastic reinforcing fiber in order to improve the rigidity of the obtained laminated wood. Specifically, the elastic modulus is 20 t / mm ^{2 to} 75 t / mm ² , preferably the elastic modulus. good thing of ^{30t / mm 2 ~70t / mm 2} . Long fibers are usually used as the reinforcing fibers, but short fibers may be used together with the long fibers as long as the effects of the present invention are not impaired. Further, a small amount of glass fiber may be mixed to the extent that the improvement in rigidity of the obtained laminated material is not impaired. The form of the mixed glass fiber is not particularly limited. For example, when carbon fiber is used, it is mixed as a weft in a direction perpendicular to the fiber direction or a glass scrim made of glass fiber is used in combination with carbon fiber. Can be mixed by. Examples of the matrix resin used include resins such as phenol resin, epoxy resin, unsaturated polyester resin, diallyl phthalate resin, bismaleimide resin, polyimide, polyamideimide, polyurethane resin, resorcin resin, urea resin and melamine resin.

In the present invention, such a flat plate-shaped carbon fiber reinforced resin composite material is placed in contact with one surface of the laminated wood and a surface opposite to the surface to form a flat plate carbon fiber reinforced resin composite material layer. Set up. Next, a separate plate-shaped carbon fiber reinforced resin composite material layer formed by drawing is provided so as to connect between these two carbon fiber reinforced resin composite material layers. It is important that the three carbon fiber reinforced resin composite material layers are connected in an H-shaped cross section. Finally, the carbon fiber reinforced resin composite material layer and the laminated material are adhered. As a method for producing the same, the reinforcing fibers are arranged and adhered in the same direction as the fiber direction of the wood. However, a sheet-shaped carbon fiber reinforced resin composite material laminated so that the reinforcing directions intersect may be used if necessary. As a bonding method, the carbon fiber reinforced resin composite material may be placed in contact with the surface of the laminated material to form a desired shape, and then the same manufacturing conditions as those for the laminated material may be used.

In this carbon fiber reinforced laminated material, the surface of the carbon fiber reinforced resin composite material layer may be covered with a decorative material or the like, if necessary. The laminated lumber of the present invention can be applied to the applications used as ordinary laminated lumber, but is particularly suitable for structural materials of large buildings such as schools, gymnasiums, auditoriums and churches, and large wooden boats.

[0011]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded. Examples Hereinafter, preferred examples of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a schematic view of a laminated wood material reinforced with a carbon fiber composite material. As shown in FIG. 1, a flat plate-shaped carbon fiber reinforced resin composite material layer 1 formed by pultrusion is provided on one surface of a laminated material and a surface opposite to the surface, and the carbon fiber reinforced resin composite material layer A flat plate carbon fiber reinforced resin composite material layer formed by separate pultrusion molding is provided so as to connect the layers, and these carbon fiber reinforced resin composite material layers are H-shaped in cross section, Let it adhere.

Small pieces of cedar wood were used to make the laminated wood core 2. The dimensions of the cedar pieces are 3 cm thick, 5 cm wide, and 4 length.
The laminated core 2 was made as shown in FIG. The carbon fiber reinforced resin sheet uses "Dialed K137" (Mitsubishi Kasei) and epoxy resin "Araldite GY260" as the matrix resin.
(Japan Ciba Geigy) was used, and the carbon fiber sheet formed by drawing was used.

The width is 10 cm and the length is 400 cm.
A set, a width of 15 cm and a length of 400 cm, was cut into one set. This carbon fiber reinforced resin sheet is bonded between two laminated wood cores 2 and the upper and lower surfaces thereof using an epoxy resin adhesive, "Dynamic Bond B-910" (Dainippon Color Materials Co., Ltd.), The carbon fiber reinforced resin sheet was assembled so as to have an H shape to obtain a carbon fiber reinforced laminated material of the present invention.

[0014]

According to the present invention, it is possible to obtain a laminated material which has higher rigidity and is lighter than the conventional one at a low cost.

[Brief description of drawings]

FIG. 1 is an explanatory view of a carbon fiber reinforced laminated material of the present invention seen from an oblique direction.

[Explanation of symbols]

 1 Carbon fiber reinforced resin sheet 2 Laminated wood core

Claims (1)

[Claims] 1. A laminated wood comprising a plurality of woods cut in the fiber direction and having the fiber directions parallel to each other with an adhesive, and a surface on one surface of the wood and a surface facing the surface. A plate-like carbon fiber reinforced resin composite material layer formed by pultrusion molding and a separate pultruded carbon fiber reinforced resin composite material so as to connect the carbon fiber reinforced resin composite material layers. A carbon fiber reinforced laminated material, characterized in that a material layer is provided, and these carbon fiber reinforced resin composite material layers are configured so as to have an H-shaped cross section.