JPH0928856A - Snow board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide high resiliency, and attain weight reduction and a thin wall as much as possible by forming a board core material of a wooden core arranged in a load point part on which feet are placed and a foaming resinous core arranged so as to surround the periphery of the wooden core. SOLUTION: A snow board 2 is provided with a board core material 4, fiber reinforced resin layers arranged on upper and under surfaces of the board core material 4 and ABS resin sheets arranged on its both upper and under surfaces. A sole sheet to form a sliding surface is also arranged under the ABS resin sheet on the under surface side, and the sole edges are arranged in the lengthwise direction on both side edges of the sole sheet. Side sheets made of ABS resin are also arranged in both left and right side parts of the board core material 4. The board core material 4 is formed of a wooden core 16 arranged in a load point part on which a user places both left and right feet at sliding time and a foaming resinous core 18 arranged so as to surround the periphery of the wooden core 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snowboard that is lightweight and secures high repulsive force.

[0002]

2. Description of the Related Art Generally, a snowboard uses a wood core as a board core material, and a fiber reinforced resin layer is provided on both upper and lower sides of the wood core as a reinforcing material. The fiber reinforced resin layer is a long fiber such as glass fiber. The fiber direction of is arranged in the longitudinal direction of the board core material.

[0003]

However, the above-mentioned conventional snowboard using the wood core as the board core material has a limit in weight reduction and thickness reduction. Further, since the fiber direction of the fiber reinforced resin is arranged so as to be oriented in the longitudinal direction of the board core material, the reinforcing fiber functions to improve the strength of the board core material against bending rigidity in the longitudinal direction, but the strength of the torsional rigidity. Little could have worked for improvement.

The present invention has been made in view of the above conventional problems, and a first object thereof is to obtain a high repulsive force, and further possible to reduce the weight and the thickness. To provide snowboards. A second object is to provide a snowboard which can improve not only bending rigidity in the longitudinal direction but also strength against torsional rigidity.

[0005]

In order to achieve the above first and second objects, in the present invention, a snowboard is constructed as follows.

According to the first aspect of the present invention, in a snowboard in which fiber reinforced resin layers are provided on both upper and lower surfaces of a board core material, the board core material is a wooden core arranged at a load point where a foot is placed, By forming the wooden core from a foam resin core arranged around the wooden core, while securing the fixing strength of the boot locking fastener with the wooden core,
Most other board cores are made of foamed resin to reduce weight.

According to the second aspect of the present invention, the strength of the board core material itself is improved by mixing the reinforcing fibers into the foamed resin core, which enables further weight reduction and thickness reduction.

In the invention according to claim 3, the wooden core is divided into two pieces, and the divided wooden cores are separated from each other and arranged at respective load point portions on which the left and right feet can be placed. , Further reduce the weight of the board core material.

In the invention according to claim 4, the direction of orientation of the plurality of long fibers arranged in the fiber reinforced resin layer is at least 2 by inclining to the right and left at a predetermined angle with the longitudinal direction of the board core material as a symmetry line. By arranging them in the direction, not only the bending rigidity in the longitudinal direction of the board core material, but also the torsional rigidity is improved. Here, the bending rigidity and the torsional rigidity can be arbitrarily set in consideration of the angle of the long fibers in the directing direction and the arrangement density of the long fibers.

In the invention according to claim 5, the fiber reinforced resin layer is formed by integrally curing at least two prepreg resin sheets in which long fibers are arranged in a single direction. By arranging the two prepreg sheets in such a manner that the fiber orientation directions are inclined at a predetermined angle with the longitudinal direction of the board core material as a symmetry line, it is possible to easily change the angle setting of the fiber orientation direction. Broaden the applicability to the manufacture of various products with different setting values such as bending rigidity and torsional rigidity.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a snowboard according to the present invention. FIG. 1A is a plan view thereof and FIG. 1B is a longitudinal sectional view thereof. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along the line BB, FIG. 4 is a cross-sectional perspective view taken along the line C-C, and FIG. 5 is a reinforcing fiber. It is a figure explaining the directivity direction of.

As shown in detail in FIG. 4, the snowboard 2 includes a board core material 4, a fiber reinforced resin layer 6 disposed on both upper and lower surfaces of the board core material 4, and ABS resin disposed on both upper and lower surfaces thereof. The seat 8 is provided, and a sole sheet 10 that forms a sliding surface is further provided below the ABS resin sheet 8 on the lower surface side, and sole edges 12 are provided on both side edges of the sole sheet 10 along the longitudinal direction. ing. Further, side sheets 14 made of ABS resin are provided on both left and right sides of the board core member 4.

As shown in FIGS. 1 to 3, the board core member 4 surrounds the wooden core 16 disposed at a load point portion on which the user puts his left and right feet when sliding, and the periphery of the wooden core 16. And a foamed resin core 18 arranged in.

The wooden core 16 has a rectangular shape and is divided into two parts, which are spaced apart from each other and arranged at a load point portion on which the right foot is placed and a load point portion on which the left foot is placed.
Each of the divided wooden cores 16 is provided with a fastener fixing means for fixing a fastener for locking the boot.
In the illustrated example, the fastener fixing means is the embedded nut 20, and the load points of the left and right feet (that is, the attachment positions of the boot fasteners) can be adjusted back and forth according to the physique and preference of the user. The wooden cores 16 and 16 are provided with 10 embedded nuts 20 each in two rows. The nut 20 has a cap nut shape and is embedded through the wooden core 16. The lower end of the nut 20 has an enlarged flange portion 20a so that the nut 20 does not fall out.

The foamed resin core 18 is the wooden core 1
A large part of the board core material 4 is formed by surrounding the circumferences of 6, 6 and the wooden core 1 is provided at a load point where both feet are placed.
By arranging 6,16, the total weight is reduced by using the lightweight foam resin core 18 for most of the other portion while securing a sufficient fixing strength of the boot fastener attached to the load point portion. . Here, reinforcing fibers (not shown) may be mixed into the inside of the foamed resin core 18 so as to improve the strength thereof. If such a core made of fiber reinforced foamed resin is used, It is possible to reduce the weight and the thickness.

When forming the board core material 4 in which the wooden core 16 and the foamed resin core 18 are composited, the metal core 16 is inserted in a predetermined position in the mold, and the metal core 16 is inserted. By injecting a resin agent into the mold by foaming, the wooden cores 16 and 16 and the foamed resin core 18 are integrally molded. Further, the wooden core 16 does not necessarily have to be divided into two as in the illustrated example, and may be a single piece.

On the other hand, in the fiber reinforced resin layer 6, a first continuous fiber group arranged in the longitudinal direction of the board core material 4,
A second long fiber group and a third long fiber group are arranged symmetrically with respect to the longitudinal direction with a directing direction inclined by a predetermined angle, and the second long fiber group and the third long fiber group are arranged so as to be oriented in these three directions. By the long fibers, the snowboard 2 is improved in not only the bending rigidity in the longitudinal direction but also the torsional rigidity.

That is, in the illustrated example, as shown in FIG. 5, the fiber reinforced resin layer 6 is formed by laminating three prepreg sheets 6a, 6b and 6c in which long fibers are aligned in a single direction. In the first prepreg sheet 6a, the long fibers of the first prepreg sheet 6a are oriented in the longitudinal direction of the board core material 4 so that the first prepreg sheet 6a is in contact with the board core material 4 and the upper and lower parts thereof. It is arranged on both sides. Further, in the second prepreg sheet 6b and the third prepreg sheet 6c, the longitudinal directions of the board core material 4 are symmetrical lines, and the directional directions of the respective long fibers are inclined in opposite directions to each other by a predetermined angle θ and are bilaterally symmetric. And is sequentially laminated on the outer side of the first prepreg sheet 6a.

Here, the bending rigidity and the torsional rigidity of the snowboard 2 can be arbitrarily set in various ways in consideration of the angle θ of the long fibers in the directing direction and the arrangement density of the long fibers. Is preferably set in the range of 30 degrees to 45 degrees, but it does not matter if it is set smaller or larger than this angle range.

When the fiber reinforced resin layer 6 is integrally formed on the upper and lower sides of the board core member 4, three prepreg sheets 6a, 6b and 6c are provided on the upper and lower surfaces of the board core member 4, respectively.
The prepreg material is flexible and can be inserted into the mold by pressing and heating in the mold, and the prepreg material is flexible. The shape can be easily formed. At the same time, the ABS resin sheet 8 for protecting the surface and the decoration, the formation of the sole sheet 10 on the sliding surface, and the assembling of the steel edge 12 can be collectively processed in the same process. is there.

If the fiber reinforced resin layer 6 is formed by using at least two prepreg sheets 6b and 6c in this way, the setting of the angle of the long fiber pointing direction can be easily changed. Therefore, it is possible to broaden the applicability to manufacture of various products with different set values of bending rigidity and torsional rigidity.

As the reinforcing long fibers to be used,
Examples thereof include glass fiber, carbon fiber, and Kevlar fiber, and these may be used alone or in combination.

[0024]

As described in detail in the above embodiments, according to the present invention, the following excellent effects are exhibited.

According to the first aspect of the present invention, in a snowboard in which fiber reinforced resin layers are provided on both upper and lower sides of a board core material, the board core material is a wooden core disposed at a load point portion on which a foot is placed, and Since it is formed from a foamed resin core that surrounds the wooden core, the majority of the board core material is a lightweight foamed resin core while securing the fixing strength of the boot locking fastener with the wooden core. It is possible to reduce the weight of the snowboard as much as possible.

In the invention according to claim 2, since the reinforcing fiber is mixed in the foamed resin core, it is possible to further reduce the weight and the thickness while ensuring the strength of the board core material sufficiently.

In the invention according to claim 3, since the wooden core is divided into two and arranged at the respective load point portions of the left and right legs, the board core material portion made of lightweight foamed resin can be enlarged, and further. The weight can be reduced.

In the invention according to claim 4, since the directing directions of the long fibers arranged in the fiber reinforced resin layer are inclined symmetrically with respect to the longitudinal direction of the board core material, the longitudinal direction of the board core material is increased. Not only the bending rigidity but also the torsional rigidity can be improved, and the bending rigidity and the torsional rigidity can be arbitrarily set in consideration of the angle of the long fibers in the directing direction and the arrangement density of the long fibers. .

In the invention according to claim 5, the fiber-reinforced resin layer is formed by laminating at least two prepreg resin sheets and integrally curing the sheets, and the sheets are mutually oriented so that the direction of fiber orientation is the board core material. Since it is arranged symmetrically with respect to the longitudinal direction, it is easy to change the angle setting of the fiber orientation direction, and it is possible to expand the applicability to the manufacture of various products with different set values such as bending rigidity and torsional rigidity. it can.

[Brief description of drawings]

1 shows a snowboard according to the present invention, FIG. 1 (a) is a plan view thereof, and FIG. 1 (b) is a longitudinal sectional view thereof.

FIG. 2 is a cross-sectional view taken along line AA in FIG.

FIG. 3 is a cross-sectional view taken along line BB in FIG.

4 is a cross-sectional perspective view of a C-C line portion in FIG.

FIG. 5 is a diagram illustrating a directing direction of reinforcing fibers arranged in a fiber-reinforced resin layer.

[Explanation of symbols]

 2 Snowboard 4 Board core 6 Fiber reinforced resin layer 6a, 6b, 6c Prepreg sheet 16 Wooden core 18 Foam resin core

Claims (5)

[Claims] 1. A snowboard in which fiber-reinforced resin layers are provided on both upper and lower surfaces of a board core material. The board core material is a wooden core disposed at a load point portion on which a foot is placed, and a periphery of the wooden core. A snowboard, characterized in that it is formed from a foamed resin core arranged so as to surround it. 2. The snowboard according to claim 1, wherein reinforcing fibers are mixed in the foamed resin core. 3. The wooden core is divided into two pieces, and the divided wooden cores are spaced apart from each other and are arranged at load point portions on which the left and right feet are placed, respectively. Snowboard according to 2 above. 4. A plurality of long fibers arranged in the fiber reinforced resin layer are arranged so as to be inclined at a predetermined angle to the left and right with the longitudinal direction of the board core material as a line of symmetry and oriented in at least two directions. The snowboard according to claim 1, wherein the snowboard is a snowboard. 5. The fiber reinforced resin layer is formed by laminating at least two prepreg resin sheets in which long fibers are aligned in a single direction and aligned, and integrally hardened. 5. The snowboard according to claim 4, wherein the prepreg sheets are arranged such that the directions of the fibers are inclined to each other at a predetermined angle with respect to the longitudinal direction of the board core as a symmetry line.