JP3044803B2 - Carbon fiber reinforced glulam - Google Patents

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 particularly, to a method of cutting wood processed in the fiber direction provided with an H-shaped carbon fiber reinforced resin composite material layer in cross section. The present invention relates to a carbon fiber reinforced laminated material obtained by laminating a plurality of fibers via an adhesive with fiber directions parallel to each other.

[0002]

2. Description of the Related Art Conventionally, a laminated wood has been known as a material obtained by laminating a sawn board or small squared wood which has been cut long in the fiber direction of wood and bonding the fibers in parallel to each other using an adhesive. Mainly used for building materials such as pillars and beams in architecture. Such glued lumber not only inherits the excellent properties of wood, but also features that cannot be obtained with ordinary lumber products, i.e., comparing the size and shape of materials required by gluing sawn boards and small square timber. It can be made freely, and it is possible to reduce the dispersion of product strength by removing and dispersing defects such as nodes and rot. It is difficult to cause deviation and the like, and it is easy to manufacture a bent material by using a jig having a curvature.

[0003]

However, such a conventional laminated timber is not suitable for a structural material of a large building. If the laminated timber is used as a structural material of a large building, the rigidity of the laminated timber is increased. Therefore, it is necessary to increase the thickness of the glued lumber, and as a result, there are problems such as the lowering of the ceiling of the building and the height of the building becoming unnecessarily high. The weight of the building increases,
There were also problems such as easy transmission of vibration.

[0004]

The inventors of the present invention have conducted intensive studies to solve the above-mentioned conventional problems, and as a result, it has been found that these problems can be solved by using a laminated wood having a specific structure. And arrived at the present invention. That is, an object of the present invention is to provide a laminated wood suitable for a structural material of a large building, and it is possible to reduce the amount of natural wood used by such a laminated wood, and also in terms of forest protection. It is an object of the present invention to provide a laminate reinforced with carbon fibers that is useful.

[0005] The purpose of the laminated wood is to laminate a plurality of pieces of wood cut in the fiber direction with the fiber directions parallel to each other via an adhesive, and on one surface of the laminated material and on the surface. A flat carbon fiber reinforced resin composite material layer is provided on the facing surface, and a separate flat carbon fiber reinforced resin composite material layer is provided so as to connect between the carbon fiber reinforced resin composite material layers. This is easily achieved by a carbon fiber reinforced laminated material characterized in that the fiber reinforced resin composite material layer is configured to have an H-shaped cross section.

Hereinafter, the present invention will be described in detail. The wood used in the present invention is not particularly limited as long as it is wood used for conventional laminated wood, and usually, cypress, cedar,
Wood such as hemlock and spruce is used. And such wood may be used in combination of two or more. Further, the shape of the wood to be used is not particularly limited, and it is usually used in the form of a sawn board or a small square wood which is cut in a long direction in the fiber direction of the wood.

The laminated wood of the present invention is obtained by laminating a plurality of such woods with the fiber directions parallel to each other via an adhesive, and the number of laminated woods varies depending on the purpose of use. Is preferably about 4 to 5 sheets, that is, about 10 to 15 cm in total plate thickness. In order to laminate these woods, an adhesive such as a resorcin resin or a urea resin is used on the surfaces of the respective woods to heat them at 120 ° C. to 180 ° C. for about 1 to 10 hours by means of a heating furnace, high frequency heating or the like. do it.

[0008] The feature of the present invention is one of such laminated wood.
Flat carbon fiber strength on one surface and on the opposite surface
The carbon fiber reinforced resin
Separate flat carbon fiber strength to connect between composite layers
Provided with a plasticized resin composite material layer, and these flat carbon fibers
Make the reinforced resin composite material layer H-shaped in cross section
It is what was constituted. Flat carbon fiber reinforced resin composite
As a material, a unidirectional fiber with one direction of reinforcing fiber
Repreg (UD prepreg), two-dimensional reinforcing fiber direction
Prepreg or reinforced fiber made of oriented fabric
Matrix resin after placing woven fabric in two-dimensional direction
Can be used, such as those impregnated with
Wear. The carbon fiber to be used
It is important to use highly elastic reinforcing fibers to improve
It is important and specifically, the elastic modulus is 20t / mm^Two~ 75t / m
m ^Two, Preferably an elastic modulus of 30 t / mm^Two~ 70t / mm
^TwoIs better. Long fibers are usually used as reinforcing fibers.
However, short fibers should be used as long fibers as do not impair the effects of the present invention.
May be used with fibers. Further rigidity of the resulting glulam
Even if a small amount of glass fiber is mixed so as not to impair the improvement
Good. The form of glass fiber to be mixed is not particularly limited
Not use, for example, use carbon fiber UD prepreg
In the case, mix as weft in the direction perpendicular to the fiber direction
Or glass scrim made of glass fiber
Incorporated by using in combination with fiber UD prepreg
be able to. Also used as matrix resin
Means phenolic resin, epoxy resin, unsaturated polyester
Resin, diallyl phthalate resin, bismaleimide tree
Fat, polyimide, polyamide imide, polyurethane tree
Fat, resorcin resin, urea resin, melamine resin, etc.
Resins.

In the present invention, such a plate-like carbon fiber reinforced resin composite material is placed in contact with one surface of the laminated wood and a surface opposite to the surface, and the plate-like carbon fiber reinforced resin composite layer is formed. Provide. Next, separate flat carbon fiber reinforced resin composite layers are provided so as to connect between the two carbon fiber reinforced resin composite layers. It is important that the three carbon fiber reinforced resin composite material layers be connected so as to be H-shaped in cross section. And finally, the carbon fiber reinforced resin composite material layer and the laminated material are bonded and cured, but as a manufacturing method, the reinforcing fibers are arranged so that the reinforcing direction of the reinforcing fibers is substantially the same as the fiber direction of the wood. It is usual to bond and cure, but if necessary, a laminate of a plurality of sheet-like carbon fiber reinforced resin composite materials so that the reinforcing directions intersect may be used. Then, as a method of adhesion and curing, the uncured carbon fiber reinforced resin composite material is placed in contact with the surface of the laminated material, and after forming into a desired shape, it may be performed in the same manner as the production conditions of the laminated material described above. Good or pre-bonded under similar conditions with an uncured carbon fiber reinforced resin composite material interposed on the surface of the wood layer in advance.
After hardening, another wood layer is further laminated, and the process may be performed in the same manner as in the manufacturing conditions of the laminated wood described above.

The fiber content of the flat carbon fiber reinforced resin composite material of the present invention is usually 40 to 70 parts, preferably 50 to 60 parts, per 100 parts of the matrix resin.
Part. In addition, such a carbon fiber reinforced laminated material may cover the surface of the carbon fiber reinforced resin composite material layer with a decorative material or the like as necessary. The laminated wood of the present invention can be applied to applications used as ordinary laminated wood, but is particularly suitable for structural materials of large buildings such as schools, gymnasiums, auditoriums and churches, and large wooden boats.

[0011]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist. Embodiment A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a schematic view of a laminated wood reinforced with a carbon fiber composite material. As shown in FIG. 1, a flat carbon fiber reinforced resin composite material layer 1 is provided on one surface of a laminated material and on a surface opposing the surface, and the carbon fiber reinforced resin composite material layers are connected to each other. Is provided with a separate flat carbon fiber reinforced resin composite material layer, and heated so that these carbon fiber reinforced resin composite material layers become H-shaped in cross section.
The adhesive is cured.

As shown in FIG. 2, the prepreg is cut in accordance with the amount of reinforcement, laminated, and sandwiched between woods to reinforce the laminated wood. A small piece of cedar wood was used to make the glulam core 2. The dimensions of the small cedar pieces were 3 cm in thickness, 5 cm in width, and 400 cm in length, and five pieces were laminated to produce a laminated wood core 2 as shown in FIG. Carbon fiber prepreg is "HY
EJ-12M65D "(Chemical Fiberlight Co., Ltd.) was used.

The dimensions are 10 cm wide and 400 cm long.
One set of a set, 15 cm in width and 400 cm in length was cut, and 6 plies were laminated. This prepreg is used between the two laminated wood cores 2 and on the upper and lower surfaces thereof using an epoxy resin adhesive, "Dynamic Bond B-910" (Dainippon Color Materials Co., Ltd.).
The carbon fiber prepreg layers were assembled so as to be H-shaped by bonding. Next, the prepreg and the adhesive were cured by heating at a temperature of 120 ° C. for 2 hours to obtain a carbon fiber reinforced laminated material of the present invention.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a carbon fiber reinforced laminated wood of the present invention as viewed from an oblique direction.

FIG. 2 is an explanatory view showing lamination of carbon fiber prepreg sheets.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carbon fiber reinforced resin layer 2 Glulam core 3 Unidirectional prepreg sheet

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-70851 (JP, A) JP-A-55-21264 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 E04C 3/00-3/46 B27M 1/00-3/38

Claims (1)

(57) [Claims] 1. A laminated material obtained by laminating a plurality of pieces of wood cut in the fiber direction in parallel with each other in a fiber direction via an adhesive, and a surface on one surface of the laminated material and a surface facing the surface. A flat carbon fiber reinforced resin composite material layer is provided thereon, and a separate flat carbon fiber reinforced resin composite material layer is provided so as to connect between the carbon fiber reinforced resin composite material layers. A carbon fiber reinforced laminated material, wherein the composite material layer is configured to be H-shaped in cross section.