JPH01153171A - Stick - Google Patents

Abstract

PURPOSE: To improve the impact instant response puck speed by a method wherein, in a region of at least one half length from the tip of a blade, a part where the grain of a core material made of wood, and the direction of the fiber of a unidirectionally arranged fiber reinforced plastic plate are oriented so as to cross with each other, is provided. CONSTITUTION: A grain is oriented extending to the total length of a blade 3 in the longitudinal direction of the blade 3. Then, in a region from the tip of a toe 3b of the blade 3 to approx. one half of the blade 3, on a core material C made of wood having a part where the grain of the core material C made of wood is oriented in the direction which is orthogonal to the longitudinal direction of the blade 3, a reinforcing plate comprising a fiber reinforced plastic plate A for which the fiber is arranged by pulling in the longitudinal direction of the blade 3, is stuck. Also, in the region from the tip of the toe 3b of the blade 3 to approx. one half of the blade 3, the grain of the core material C made of wood and the fiber direction of the fiber reinforced plastic plate A are crossed to each other. Thus, by reinforcing the one half on the toe tip side of the blade with the fiber reinforced plastic plate which is unidirectionally arranged by pulling, the leading end is light and easy to use, and the impact instant response is favorable because the repulsive force becomes large on the toe tip side of the blade as well, and the puck speed is improved as well.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stick used for ice hockey, cricket, etc., and particularly to a stick whose ball-hitting surface is reinforced with a fiber-reinforced plastic plate. Typical sticks used in ice hockey will be explained below.

(Prior Art) Conventionally, there are sticks of this type used, for example, in ice hockey. This ice hockey stick is used in an intense sport where a disc-shaped puck is hit with great force and the puck is hit back at a high speed, and it is easily damaged.6 Therefore, looking at the amount consumed in Japan, , an average of 3 for college students in one season.
0, but for players who belong to companies, it can be as many as 100 to 150.

For this reason, sticks that were made of wood were repeatedly improved,
Wood reinforced with fiber reinforced plastic (FRP)
Products made of aluminum alloy and glass fiber composite are now available. However, the current situation is that the durable ones are too heavy for ordinary people to use, and the lighter ones lack durability.

There is also the problem that metals such as aluminum alloys undergo plastic deformation, so the fibers of glass, carbon, etc. Glass fiber reinforced plastic (GFRP) plates or carbon fiber reinforced plastic (CFRP) plates impregnated with resin and cured are often used. Examples of this type include US Pat. No. 4,537,398.

The wooden core material has wood grains oriented in the length direction of the blade, and the fiber-reinforced plastic plate used as a reinforcing plate to cover this core material is made of a cross-shaped material in which vertical and horizontal fibers are woven and intersect with each other, and is impregnated with resin such as epoxy. It was manufactured. However, when used, this reinforcement alone was not enough, and since the wood grain was oriented in the longitudinal direction of the blade and the thickness was thin compared to its length, it was easily bent in the width direction due to the impact of the pack. Because it has a tendency to break easily, it has the disadvantage that the bottom of the blade is struck by the water surface, causing it to become rusty or tear.

A cross-shaped fiber-reinforced plastic board has fibers that cross each other vertically and horizontally, so it has the effect of reinforcing both directions at the same time, but on the other hand, the fibers in both directions overlap, cross, and undulate in a wavy manner, so the fibers lack tension. There is. Therefore, the tensile strength and modulus of elasticity are low in both directions, and the strength is low, as well as the repulsive force against deflection is small, and the response to hitting a shot puck and the speed of the puck are slow. In addition, since the fibers overlap and intersect, it is thick, and the amount of resin impregnated increases accordingly, making it quite heavy and having the drawback of loss of operability. Furthermore, there is a problem in that stress is concentrated at the points where the fibers intersect, making them susceptible to breakage.

As an attempt to solve this problem, there is a technique disclosed in Japanese Patent Publication No. 61-59149 by the applicant of the present invention. This technique involves aligning and extending fibers parallel to each other on the ball-striking surface from the ball-striking part to the handle, following the shape of a stick.

However, since the tip of the stick, near the tip of the blade's toe, is far from the grip, the amount of deflection during impact is large, and the response delay is still noticeable, and it is difficult to generate puck speed. It wasn't a good solution.

(Purpose) Therefore, this invention was made in view of the above-mentioned problems, and it is a stick with a light tip, easy to use, and strong, and which can respond quickly to strikes, especially in an area of at least half the length from the tip of the toe of the blade. The aim is to provide a stick that has good performance and can also improve puck speed.

(Structure) In order to achieve this object, the present invention comprises a fiber-reinforced plastic plate in which the grains of the wooden core are aligned in one direction in a region of at least half the length from the tip of the blade. The stick has a portion oriented in a direction that intersects with the direction of the stick.

(Example) The present invention will be explained below based on the drawings.

1 to 24 are diagrams showing an embodiment of the present invention.

Figure 2 shows an ice hockey stick.
A shaft 1 to be held by hand and a blade 3 for hitting the puck are integrally provided. The connection part of the blade 3 with the shaft 1 is called a heel 3a, and the side opposite to the heel 3a is called a toe 3b. As shown in FIG. 1, this blade 3 has at least one fiber-reinforced plastic plate A adhered to each of both surfaces of a wooden core material C to form a ball-striking surface. At least one of the fiber-reinforced plastic plates A is made into a thin plate made by impregnating and hardening epoxy or polyester resin with fibers such as carbon fiber or glass fiber being aligned under tension in one direction. It has extremely good elasticity. The tension to be applied varies depending on the type and diameter of the fiber, but for example, 2400
When using glass fibers of g/, km, the weight is approximately 0.1 to 1.51 kg per fiber.

The wooden core material C has a part of the shaft 1 extending to the heel 3a of the blade 3 as shown in FIGS. 12 and 13,
It forms part of the blade core material.

The remaining portion is made with the wood grain oriented in the width direction (short side direction) of the blade 3, as shown in FIG.

In this way, the grains of the wooden core material C are oriented in a direction that intersects with the fiber direction of the fiber-reinforced plastic board A over at least half the length of the blade 3, in this example the entire length, from the tip of the tow 3b of the blade 3. It has a part that is

In FIG. 3, the blade 3 has wood grains in the longitudinal direction of the blade 3.
The tow 3 of the blade 3 is oriented over the entire length of the blade 3.
A wooden core material C is shown which has a portion in which the grain of the wooden core material C is oriented in a direction perpendicular to the longitudinal direction of the blade 3 in an area approximately half the length of the blade 3 from the tip b. A reinforcing plate made of a fiber-reinforced plastic plate A whose fibers are aligned in the longitudinal direction of the blade 3 is attached to this wooden core material C,
In a region half the length of the blade 3 from the tip of the tow 3b of the blade 3, the grain of the wooden core material C and the fiber direction of the fiber-reinforced plastic board A intersect with each other.

In Figure 4, the wood grain is oriented in the half area on the toe 3b side of the blade 3 of the wooden core material C, and the wood grain is oriented at an angle with respect to the width direction (short direction) of the blade 3, and the longitudinal direction of the blade 3 is oriented on the fiber-reinforced plastic plate A. This shows an example in which the wood grain and the fiber direction intersect by aligning the fibers in the same direction.

Fig. 5 shows a fiber-reinforced plastic plate A attached to a wooden core C with the wood grain oriented in the longitudinal direction of the blade 3 and the fiber direction of the fiber-reinforced plastic plate A aligned in the width direction of the blade 3. An example of pasting to form a stick is shown.

6 to 9 show an example of a blade 3 in which a plurality of fiber-reinforced plastic plates with fibers aligned in one direction are arranged on at least one side of a wooden core material C so that the fiber directions intersect with each other. ing. In Figure 6, two sheets of fiber-reinforced plastic plate A, whose fibers are aligned in the longitudinal direction of the blade 3, and fiber-reinforced plastic plate A2, whose fibers are aligned in the width direction of the blade 3, are superimposed. The attached fiber-reinforced plastic plate AI is shown. Similarly, FIG. 7 shows a fiber-reinforced plastic plate A1 with fibers aligned in the longitudinal direction of the blade 3 and a fiber-reinforced plastic plate A1 with fibers aligned in opposite directions with respect to the width direction of the blade 3. A fiber-reinforced plastic plate AII is shown in which three plastic plates A, A4 are stacked and bonded together.

Figure 8 shows the fiber reinforced plastic plate A shown in Figure 6.
This is an example in which I is attached to a wooden core material C with the grain orientation shown in Figure 4, and Figure 9 shows an example in which the fiber reinforced plastic board AII shown in Figure 7 is attached to a wooden core material C with the grain orientation shown in Figure 3. This is an example in which it is attached to a wooden core material C having a similar orientation. Although only one side of the wooden core material C is shown here, the other side may be the same fiber-reinforced plastic board AI or All, or may be a fiber-reinforced plastic board A consisting of two sheets. By polymerizing and pasting multiple sheets with different fiber directions.

The strength of the three sides of the blade and the directionality of repulsion are reduced, making it durable and allowing you to deliver the ball as you wish.

Figure 10 shows a fiber-reinforced plastic plate AII shown in Figure 9 attached to a wooden core material C having grains oriented in the longitudinal direction of the blade 3, and Figure 11 shows a fiber-reinforced plastic board AII shown in Figure 9. , a fiber-reinforced plastic plate AI shown in FIG. 6 is attached to a wooden core material C whose grains are oriented in the width direction of the blade 3 in a half area on the toe 3b side of the blade 3. As can be seen from these examples, in an area at least half the length of the blade 3 from the tip of the tow 3b of the blade 3,
It has a portion in which the grain of the wooden core material C is oriented parallel to the fiber direction of one of the fiber-reinforced plastic plates AI and All. In this way, wooden core material C
By making the fiber-reinforced plastic plates AI and AII also have fiber directions parallel to the direction of the wood grain, the insufficient strength due to the wood grain is compensated for.

When the fibers are aligned in the longitudinal direction of the blade 3 as shown in FIGS. 1O and 11, the repulsive force against bending is also better than when relying on the wood grain.

FIGS. 14 to 18 show examples in which aligned fiber-reinforced plastic plates are partially provided not only on the ball-hitting surface of the blade 3 but also in areas where strength or the like is required. Figure 14 and 1
In FIG. 5, a fiber-reinforced plastic plate is provided from the heel 3a to the lower part of the shaft 1 so that the fibers are oriented parallel to the longitudinal direction of the shaft 1. FIG. 16 shows an example in which the heel 38 is partially reinforced with fiber-reinforced plastic plates in which fiber-reinforced plastic plates aligned in one direction are stacked so that the fibers intersect. 17th
The figure shows an example in which the tow 3b is partially reinforced by providing a fiber-reinforced plastic plate A in which fibers are aligned in the width direction of the blade 3. In addition, FIG. 18 shows an upper surface 3c and a lower surface 3 of the blade 3 in order to reinforce the peripheral edge of the blade 3.
d Furthermore, a fiber-reinforced plastic plate is provided on the tip end surface 3e of the tow 3b. This fiber-reinforced plastic plate may be a single plate or a plurality of plates, and may be provided only on at least the lower surface 3d.

FIG. 19 is a cross-sectional view cut in the width direction of the blade 3, in which the ball-striking surface and the peripheral edge of the blade 3 are covered and reinforced with a fiber-reinforced plastic plate A and then covered with a layer of protected forest B, such as resin. , the hardness of the surface of the fiber-reinforced plastic plate A and its weakness due to impact are improved. By covering the entire circumference with the protective material B, it is possible to prevent moisture from entering the core wood and increase durability. The protective forest B on the ball hitting surface can protect fiber-reinforced plastic, which has fibers in one direction and is at risk of cracking due to impact from packs, etc. Since the bottom side protective material B slams the bottom of the stick onto the ice when hitting the puck, it can protect the fiber-reinforced plastic on the bottom, which is particularly susceptible to damage. Further, the layer of protective material B is not limited to the entire circumference, but may be provided only on the lower surface 3d, or only on the upper surface 3c and the lower surface 3d. When the protective forest B is provided on the lower surface 3d instead of on the ball-striking surface, the structure is such that the fiber-reinforced plastic plate, which is a reinforcing material, does not interfere with the deformation of the protective material B due to impact, and the fiber-reinforced plastic plate does not peel off. , for example, as shown in FIGS. 20 and 21. In addition, the grip of the puck can be improved by applying unevenness such as protrusions, stripes, and small holes to the ball hitting surface of the protected forest B.

Furthermore, FIGS. 22 to 24 show an example in which at least a part of the ball-hitting surface of the blade 3 is provided with a hitting reinforcing member in which grain and/or fibers are oriented in a direction perpendicular to the ball-hitting surface. . This impact reinforcement member is made of a wooden core material C with wood grains oriented perpendicular to the ball hitting surface, as shown in Fig. 23, and a second
As shown in FIG. 4, a part of the fiber-reinforced plastic plate A may have fibers aligned perpendicularly to the ball hitting surface, or a combination of both may be used. This increases the impact strength per unit area, increases the repulsive force to the puck, and increases the puck speed.

Note that the fiber-reinforced plastic plate A in this example is not a cross-shaped one in which the fibers are woven, but are drawn in one direction by applying tension. In the same alignment plane, the fibers are aligned with a thickness equal to the thickness of the fibers, and then, for example, fiber reinforced plastic plates A with a thickness equal to the fiber thickness that are aligned in different directions are stacked one on top of the other. It is pasted in such a way that it can be seen. In this way, the fiber-reinforced plastic plate A aligned in one direction can have higher elasticity and strength than the fiber-reinforced plastic plate A in which the fibers are woven in a cross-like manner.

This is clear from the following experimental data.

Let me explain the details of the experiment.

(1) Regarding the test piece: ■As shown in Figure 25, attach fiber-reinforced plastic plates F made of four cross-shaped carbon woven fabrics to each side of the ABS resin core material E (one side is omitted in the figure). (Test piece ■).

Equal ratio of vertical and horizontal fibers (1:1) ■As shown in Figure 26, four fiber-reinforced plastic plates A made of aligned carbon fibers are placed vertically and horizontally on both sides of the ABS resin core material E (one side is omitted in the figure). Paste alternately (test pieces ■).

Here, in each of the test specimens I and II, the amount of fibers in each of the fiber-reinforced plastic plates F and A was the same.

■As shown in Figure 27, the wooden core material C is made of maple, and both sides (
Fiber-reinforced plastic plates F made of four cross-shaped carbon woven fabrics are pasted on each side (one side is omitted in the figure).
Test piece ■).

■As shown in Figure 28, the wooden core material C is made of maple, with the wood grain oriented in the width direction of the blade, and reinforced with four aligned fibers on each side (one side is omitted in the figure). The plastic board A was pasted in such a way that the number of fibers in the horizontal direction perpendicular to the wood grain was increased in the vertical and horizontal directions (test piece ■). When the core material has a directionality like wood, the directionality of the fiber-reinforced plastic board A is taken into consideration when reinforcing it.

Here, in the test pieces (1) and (2), the fiber reinforced plastic plates F and A have the same amount of fiber.

(2) Test conditions were as shown in FIG. 29.

1. Test piece (1, II, III, IV) shape 2. Load condition Bending chord: 3-point bending span Q: 80 mm Radius R of indenter (A): 5 mm Support jig (B)
radius R2:2! lll11 test speed:
5mm/win Here, the thickness of the test specimens is 3.0mm for core materials E and C, and ah fiber reinforced plastic plates A and F.
is 0.23mm x 8 plates, total 3.0 + 0.23)l =
Although it is 4.84 m, it actually becomes 5.9 mm because the thickness of the young adhesive is added.

Comparing test piece ■ and test piece ■, the amount of fiber-reinforced plastic plates F and A used is the same, but in test piece ■, fiber-reinforced plastic plate A is aligned in one direction.
It can be seen that by making the fiber direction intersect with the horizontal and vertical stacking directions while also taking into account the grain direction of the core material, the test piece (1) has higher elasticity and strength.

On the other hand, if both test pieces (■) and (2) have the same strength, the weight of the test piece (■) can be made lighter.

In the above table, the specific strength and specific elasticity are values obtained by dividing each numerical value by the weight of the test piece (1) to (2), indicating the strength per weight, and it can be said that the larger this value is, the lighter and stronger the test piece is.

Such a comparison also applies to the comparison between test piece I and test piece ■.

(Effects) As explained above, according to the present invention, the tip half of the blade is reinforced with a fiber-reinforced plastic plate aligned in at least one direction, making the tip light and easy to use, yet durable. It is possible to provide a stick that has a large repulsive force even on the toe end side of the blade, has good batting responsiveness, and can also improve puck speed.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the stick of the present invention, Fig. 2 is a front view of the stick of the invention, and Figs. 3 to 5 show fiber-reinforced plastic plates attached to a wooden core. An explanatory drawing showing an example, Fig. 6 and Fig. 7 are explanatory drawings showing adhesion of a plurality of fiber reinforced plastic plates, and Figs. 8 to 11 respectively show a plurality of fiber reinforced plastic plates and a wooden core. 12 and 13 are front views of the main parts of the stick showing that a part of the shaft constitutes a part of the core material of the blade, and FIGS. 14 to 17. Figure 18 is a front view of the main part of a stick partially reinforced with fiber-reinforced plastic plates, Figure 18 is a cross-sectional view of the stick with the periphery of the blade covered with a protective material, and Figure 19 is a blade with the entire blade covered with a protective material. Figures 20 and 21 are cross-sectional views similar to Figure 19 partially covered with a protective material, and Figure 22 is a cross-sectional view of the ball with wood grain and/or fibers oriented in a direction perpendicular to the ball hitting surface. A front view of the main part of the stick with the impact reinforcement member, FIG. 23 is xx in FIG. 22
24 is a sectional view showing another example at the same position as in FIG. 23, and FIG. 25 is a cross-sectional view taken along the line m-xxm. Figure 26 is an explanatory diagram showing how a fiber-reinforced plastic board with fibers aligned in one direction is attached to an ABS resin core, and Figure 27 is a diagram showing how a fiber-reinforced plastic plate with fibers aligned in one direction is attached to an ABS resin core. An explanatory diagram showing the state in which a fiber-reinforced plastic board made of woven cloth is pasted, Fig. 28 is an explanatory diagram showing a state in which a fiber-reinforced plastic board aligned in one direction is pasted on a wooden core material, and Fig. 29 shows the test conditions. FIG. 1...Shaft, 3...Blade, 3a.
... Heel, 3b... Toe, 3c... Top surface, 3d... Bottom surface, 3e... Toe end surface, A... Fiber reinforced plastic plate, B... Protective material, C... Wooden core material, D...
Impact reinforcement member. Figure 1 Figure 2 3a Figure 3 Section 5 Figure 6 Figure 8 Figure 9 Figure 12 Figure 13 Figure 14 Figure 15 Figure 18 Figure 19 Figure 3C Figure 20 Figure 21 Figure 25 Figure 27 Figure 28 Figure 29 ■

Claims (5)

[Claims] (1) A stick in which a blade is integrally provided on the shaft, and the blade has a ball-hitting surface formed by bonding at least one fiber-reinforced plastic plate to each surface of both sides of a wooden core material. The fibers of at least one of the reinforced plastic plates are aligned in one direction, and the wood grain of the wooden core material is arranged in the fiber-reinforced plastic plate in an area of at least half the length of the blade from the toe tip of the blade. A stick characterized by having a portion oriented in a direction that intersects with the direction of the fibers of the stick. (2) On at least one side of the wooden core material, a plurality of fiber-reinforced plastic plates with fibers aligned in one direction are arranged so that the fiber directions intersect with each other, and from the toe tip of the blade to at least the A half-length region of the blade has a portion in which the grain of the wooden core material is oriented in a direction that intersects with the direction of the fibers of at least one of the fiber-reinforced plastic plates. The stick according to claim 1, characterized in that: (3) In a region at least half the length of the blade from the toe tip of the blade, the grain of the wooden core is parallel to the direction of the fibers of any one of the fiber-reinforced plastic plates made of a plurality of plates. A stick according to any one of claims 1 and 2, characterized in that it has an oriented portion. (4) At least a part of the ball hitting surface of the blade is provided with a hitting reinforcing member in which grains and/or fibers are oriented in a direction perpendicular to the ball hitting surface. The stick according to any one of Items 1 to 3. (5) In a region at least half the length of the blade from the toe tip of the blade, the grain of the wooden core material is oriented in the width direction of the blade, and at least one fiber of the fiber-reinforced plastic plate is arranged. 5. A stick according to any one of claims 1 to 4, characterized in that the stick has a portion oriented in the length direction of the blade.