JP2706313B2 - stick - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stick used for ice hockey, cricket, and the like, and more particularly to a stick whose striking surface is reinforced with a fiber-reinforced plastic plate. Hereinafter, a stick used for a typical ice hockey will be described.

(Prior Art) Conventionally, as this kind of stick, there is a stick used for ice hockey, for example. This ice hockey stick is used for aggressive sports in which a disc-shaped puck is hit with a violent momentum and a fast-speed puck is hit. Therefore, looking at the consumption in Japan, an average of 30 college students and 100-150 players belonging to companies during a season.

For this reason, wooden sticks have been improved, and wood-reinforced plastic (FRP) reinforced aluminum alloy and glass fiber composites have appeared. However, in any case, a strong one is too heavy and is hard to use for ordinary people, and a light one lacks durability at present.

Metals such as aluminum alloys have the problem of plastic deformation, and glass cloth or carbon fiber cloth (woven fabric) is coated on both sides of a wooden core material with a thermosetting resin such as epoxy or polyester. A glass fiber reinforced plastic (GFRP) plate or a carbon fiber reinforced plastic (CFRP) plate which is impregnated with a resin and cured is often used. This type includes U.S. Pat.
There is something like 7,398.

The wood core has a grain oriented in the length direction of the blade, and a fiber reinforced plastic plate as a reinforcing plate covering the blade is made by impregnating a resin such as epoxy into a cross-shaped cloth in which vertical and horizontal fibers are woven and crossing each other. It was made. But,
When used, this reinforcement alone is not enough, the grain is oriented in the longitudinal direction of the blade and the thickness is thin compared to the length, so it is difficult to withstand pack impact, easily breaks in the width direction, and easily cracks in the grain direction There is a drawback that the bottom of the blade is hit against the ice surface, so that the blade is damaged or torn.

The cross-shaped fiber reinforced plastic plate has the effect of simultaneously reinforcing both directions because the fibers cross each other vertically and horizontally, but the fibers in both directions overlap and intersect and undulate, so the fiber tension is insufficient. I have. Therefore, there are drawbacks that the tensile strength and the elastic modulus in both directions are small, the strength is weak, the repulsion force against the bending is small, and the response to hit the shot pack and the pack speed are slow. Further, since the fibers overlap and cross each other, the fibers have a thickness, and the amount of impregnated resin increases accordingly. In addition, there is a problem that the stress is concentrated at the points where the fibers intersect, so that the fibers are easily broken.

In order to solve this problem, there is a technique disclosed in Japanese Patent Publication No. 61-59149 by the applicant of the present invention.
According to this technique, fibers are aligned and extended in parallel with each other on the side of the ball striking surface applied from the ball hitting portion to the handle portion, following the shape of a stick.

Also, since the tip of the stick, that is, the vicinity of the tip of the toe of the blade, is far from the grip, the amount of deflection when hitting is large, the response delay is still conspicuous, and the pack speed is hard to come out. The applicant has filed an application as Japanese Patent Application No. 62-313856.

However, the wooden core material and the fiber reinforced plastic plate are hard to each other, and their bonded surfaces are easily peeled off, and the fiber reinforced plastic plate and the blade are more likely to break. In addition, when it is destroyed, fragments may be scattered and may injure players or the like.

(Object) In view of the foregoing, the present invention has been made in view of the above problems, and prevents separation of an adhesive surface between a wooden core material and a fiber reinforced plastic plate, reduces an impact acting on a blade, and provides a fiber reinforced plastic. It is an object of the present invention to provide a stick that is excellent in the effect of preventing the destruction of a plate or a blade, and that is provided with measures for preventing scattering.

(Structure) In order to achieve this object, the present invention provides a method in which a blade is integrally provided on a shaft, and the blade has at least one fiber-reinforced plastic plate adhered to each of both surfaces of a wooden core. In a stick having a ball striking surface formed, at least one of the fiber-reinforced plastic plates has fibers aligned in one direction, and is at least approximately half the length of the blade from the toe tip of the blade. Has a portion where the grain of the wooden core is oriented in a direction intersecting with the direction of the fibers of the fiber reinforced plastic plate, and furthermore, the wooden core and the fiber reinforced plastic plate are soft. The sticks are adhered to each other with a thin film interposed.

Hereinafter, the present invention will be described with reference to the drawings.

1 to 26 are views showing an embodiment of the present invention.

FIG. 2 shows an ice hockey stick, in which a shaft 1 to be gripped by hand and a blade 3 to strike a puck are integrally provided. The connection between the blade 3 and the shaft 1 is called a heel 3a, and the side opposite to the heel 3a is called a toe 3b. The blade 3 is made of a wooden core material C as shown in FIG.
At least one fiber reinforced plastic plate A is adhered to each of the two surfaces of the substrate to form a ball striking surface. At least one of the fiber reinforced plastic plates A is a thin plate obtained by impregnating and curing an epoxy or polyester resin in a state where fibers such as carbon fiber and glass fiber are tensioned in one direction and aligned. And has extremely excellent resilience. The tension to be applied varies depending on the type and diameter of the fiber, for example, 2400 g /
km of glass fiber, about 0.1 ~ per fiber
1.51 kg.

The wooden core C has a part of the shaft 1 extending to the heel 3a of the blade 3 as shown in FIGS. 12 and 13, and constitutes a part of the blade core. As shown in FIG. 1, the grain is oriented in the width direction (transverse direction) of the blade 3.

As described above, at least approximately half the length of the blade 3 from the tip of the toe 3b of the blade 3, that is, in the region of the entire length in this example, the grain of the wooden core C crosses in the direction intersecting with the fiber direction of the fiber-reinforced plastic plate A. It has a portion that is oriented.

In FIG. 3, the grain is oriented in the longitudinal direction of the blade 3 over the entire length of the blade 3 and the toe of the blade 3
A wooden core C having a portion in which the grain of the wooden core C is oriented in a direction orthogonal to the longitudinal direction of the blade 3 is shown in a substantially half area of the blade 3 from the tip 3b. A reinforcing plate made of a fiber-reinforced plastic plate A in which fibers are aligned in the longitudinal direction of the blade 3 is attached to the wooden core material C,
In a region approximately half the length of the blade 3 from the tip of the toe 3b of the blade 3, the grain of the wooden core C and the fiber direction of the fiber reinforced plastic plate A intersect each other.

FIG. 4 shows that the wood grain inclined with respect to the width direction (transverse direction) of the blade 3 is oriented in a substantially half area of the blade 3 of the wooden core material C on the toe 3b side. An example in which the wood grain and the fiber direction intersect by aligning the fibers in the longitudinal direction is shown.

FIG. 5 shows that the wood grain is oriented in the longitudinal direction of the blade 3 on the wooden core material C, and the fiber direction of the fiber reinforced plastic sheet A is aligned with the width direction of the blade 3 so that the fiber reinforced plastic sheet A is attached to the wooden core material C. The example which sticks and forms the stick is shown.

6 to 9 show an example of a blade 3 in which a plurality of fiber-reinforced plastic plates in which fibers are aligned in one direction are arranged on at least one surface of a wooden core C so that the directions of the fibers intersect each other. ing. In FIG. 6, two sheets of a fiber reinforced plastic plate A _{1 in} which fibers are aligned in the longitudinal direction of the blade 3 and a fiber reinforced plastic plate A _{2 in} which fibers are aligned in the width direction of the blade 3 are superposed. A fiber reinforced plastic plate AI stuck on is shown. Similarly fibers seventh diagram aligned pull the respective fibers in a direction inclined opposite to each other with respect to the width direction of the longitudinal pulling the fibers collated fiber-reinforced plastic plate A ₁ and the blade 3 of the blade 3 A fiber reinforced plastic plate AII in which three sheets of reinforced plastic plates A ₃ and A ₄ are overlapped and adhered is shown.

FIG. 8 is a fiber reinforced plastic plate shown in FIG.
FIG. 9 shows an example in which AI is attached to a wooden core material C having the wood grain orientation shown in FIG. 4, and FIG. 9 shows the fiber-reinforced plastic plate A II shown in FIG. This is an example of sticking to a wooden core material C having an orientation close to that of FIG. Here, only one surface of the wooden core material C is shown, but the other surface may be the same fiber-reinforced plastic plate AI, AII or a single fiber-reinforced plastic plate A. By superposing and sticking a plurality of sheets having different fiber directions, the strength of the blade 3 and the directionality against repulsion are reduced, so that the ball can be durable and arranged as desired.

FIG. 10 shows a fiber-reinforced plastic plate shown in FIG. 9 on a wooden core C having a grain oriented in the longitudinal direction of the blade 3.
FIG. 11 shows the blade 3 in a substantially half area on the toe 3b side of the blade 3 as shown in FIG.
The fiber-reinforced plastic plate AI shown in FIG. 6 is adhered to a wooden core material C in which the grain is oriented in the width direction. As can be seen from these examples, a fiber-reinforced plastic plate composed of a plurality of wood cores C is provided at least in a region approximately half the length of the blade 3 from the tip of the toe 3b of the blade 3.
It has a portion oriented in parallel with the direction of any one of the fibers of AI and AII. In this way, the fiber direction parallel to the grain direction of the wooden core material C can also be set to the fiber reinforced plastic plate AI,
A II makes up for the lack of strength due to the grain. When the fibers are aligned in the longitudinal direction of the blade 3 as shown in FIGS. 10 and 11, the repulsive force against the bending is better than the case where the wood grain is used.

FIGS. 14 to 18 show examples in which not only the striking surface of the blade 3 but also a aligned fiber-reinforced plastic plate is partially provided in a portion where strength or the like is required. 14 and 15, the fiber reinforced plastic plate A is provided from the heel 3a to the lower part of the shaft 1 so that the fibers are oriented in parallel with the longitudinal direction of the shaft 1. FIG. 16 shows an example in which the fiber reinforced plastic plate A, which is aligned in one direction, is provided on the heel 3a with a fiber reinforced plastic plate which is superposed so that the fibers intersect, and is partially reinforced. Figure 17 shows tow 3b
This is an example in which a fiber-strength plastic plate A in which fibers are aligned in the width direction of the blade 3 is provided to partially reinforce the portion. In FIG. 18, a fiber reinforced plastic plate A is provided on the upper surface 3c, the lower surface 3d, and the tip surface 3e of the toe 3b to reinforce the peripheral edge of the blade 3.
The fiber reinforced plastic plate A may be a single plate or a plurality of plates, or may be provided at least on the lower surface 3d.

FIG. 19 is a cross-sectional view of the blade 3 covered with a layer of a protective material B such as a resin and reinforced by covering the striking surface and the peripheral edge of the blade 3 with a fiber-reinforced plastic plate A, and cutting the blade 3 in the width direction. The surface of the fiber reinforced plastic plate A is improved in hardness and weakness due to impact. That is, the protective member 8 is provided on an arbitrary outermost surface of the blade 3. By covering the entire circumference with the protective material B, it is possible to prevent the penetration of moisture into the wood of the core and to increase the durability. The striking face protective material B can protect fiber-reinforced plastics in which the fibers may crack in one direction due to the impact of a pack or the like. The protective material B on the bottom side strikes the bottom surface of the stick on ice when hitting the pack, so that the fiber-reinforced plastic on the bottom surface which is particularly easily damaged can be protected. Further, the layer of the protective material B is not limited to the entire circumference, and may be provided only on the lower surface 3d or only on the upper surface 3c and the lower surface 3d. When the protective material B is provided on the lower surface 3d without being provided on the hitting surface in this way, a structure in which the fiber reinforced plastic plate as the reinforcing material does not interfere due to deformation of the protective material B due to an impact or the like, and the fiber reinforced plastic plate does not peel off. For example, it is necessary to make it as shown in FIGS. In addition, the grip of the pack can also be improved by subjecting the protective material B to a bumping process such as a protrusion, a streak-like protrusion, or a small hole on the surface in the hitting direction.

Further, FIGS. 22 to 24 show an example in which at least a part of the striking surface of the blade 3 is provided with a striking reinforcing member D in which wood grains and / or fibers are oriented in a direction perpendicular to the striking surface. . This striking reinforcing member D is made of a wooden core C with wood grain oriented perpendicular to the striking surface as shown in FIG. 23, and as shown in FIG. Or a combination of both. As a result, the impact strength per unit area increases, the repulsive force against the pack increases, and the pack speed also increases.

Further, FIG. 25 shows an example in which the fiber reinforced plastic plate A is bonded to both surfaces of the wooden core material C with the soft thin film G interposed therebetween in the blade 3 shown so far. The soft thin film G is a thin film of a flexible material, for example, rubber or soft plastic, and is interposed between the bonding surfaces of the wooden core material C and the fiber reinforced plastic plate A to separate the bonding surfaces. It has a remarkable effect on prevention, has a function of alleviating the impact acting on the blade 3, and has an excellent effect of preventing the fiber reinforced plastic plate A from being broken.

Next, FIG. 26 shows an example of a blade 3 having a protective material in which a scattering prevention member 4 is integrated. In the figure, C is a core material made of wood, and fiber-reinforced plastic plates A reinforced with inorganic fibers such as carbon fiber and glass fiber are attached to the outer and hitting surfaces of the core material with a soft thin film G interposed therebetween. On both outer sides, scattering of a woven fabric, a linear material or a good belt made of organic fibers having high tensile strength, such as nylon, polyester, and aramid, or fibers of rubber or metal, etc., for protecting the hard and brittle fiber reinforced plastic plate A. The protection member 4 (here, a woven fabric) has a thermoplastic surface attached to both sides or one side (here, both sides), and a soft surface protection material 5 itself is attached. Reference numerals 6 and 7 denote protection materials for protecting the upper surface or the bottom surface of the blade 3 and are made of a thermoplastic material or the like.

Even if the stick is durable enough,
When the blade 3 receives a large impact or has reached the end of its life, a breakage accident occurs suddenly at the blade 3. In such a case, a part of the blade 3 may fly away from the stick itself, possibly hitting a player who is playing a game, practicing, or even watching a game, and may cause injury. Also, there is a problem that the tip on the side that does not fly has a sharp broken surface and may injure other players. Thus, even if a breakage accident occurs, the scattering prevention member 4 functions and the broken tip portion does not separate and scatter.

The fiber reinforced plastic plate A in this embodiment
Is not a cloth-like one in which fibers are woven, but is one that is tensioned in one direction and aligned. The fibers are aligned with a thickness equal to the thickness of the fibers within the same alignment plane, and then, for example, a fiber-reinforced plastic plate A having a thickness equal to the thickness of the fibers aligned in different directions is weighed together. It is pasted like this. Thus, the fiber reinforced plastic plate A aligned in one direction can have higher elasticity and higher strength than the fiber reinforced plastic plate A in which the fibers are woven in a cross shape.

 This is evident from the following experimental data.

The contents of the experiment are described as follows: (1) As for the test piece, as shown in FIG. 27, four cloth-like carbon woven fabrics are respectively formed on both sides (one side is omitted in the figure) of an ABS resin core material E. (A test piece I).

As shown in Fig. 28, four aligned carbon fiber-filled fiber-reinforced plastic plates A are placed on both sides (one side is omitted in the figure) of ABS resin core material E as shown in Fig. 28. Paste alternately (specimen II).

Here, in each of the test pieces I and II, the fiber amount of each of the fiber reinforced plastic plates F and A is the same.

As shown in FIG. 29, the wooden core C is made of itaya maple and the grain is oriented in the longitudinal direction of the blade. Affix the reinforced plastic plate F (test piece III).

As shown in FIG. 30, four pieces of fiber reinforced plastic plates are provided on both sides (one side is omitted in the figure) of the wooden core C made of itaya maple and the grain is directed in the width direction of the blade. A is attached so as to increase the number of fibers in the horizontal and vertical directions and the horizontal direction perpendicular to the grain (test piece IV). When the core material has directionality like a tree, it is reinforced in consideration of the directionality of the fiber reinforced plastic plate A.

Here, in the test pieces III and IV, the fiber amounts of the fiber reinforced plastic plates F and A are the same.

(2) The test conditions were as shown in FIG.

1. Shape of test specimen (I, II, III, IV) 2. Load Condition tester: Autograph (Shimadzu) Bending Strings: 3-point bending span: radius of 80mm indenter (b) R _1: 5 mm radius R ₂ of the support jig (B): 2 mm Test Speed: 5 mm / min where The thickness of the test pieces I to IV is 3.0 mm for the core materials E and C and 0.23 mm × 8 for the fiber reinforced plastic plates A and F, for a total of 3.0+
0.23 × 8 = 4.84 mm, but actually 5.9 mm because the thickness of the adhesive is added.

When the test pieces III and IV are compared, the amount of use of the fiber reinforced plastic plates F and A is the same, but in the test piece IV, the fiber direction of the fiber reinforced plastic plate A aligned in one direction is different. By intersecting with the width, width, length and width in consideration of the grain direction of the core material, it can be understood that the test piece IV has higher elasticity and strength.

Conversely, if the strengths of the test pieces III and IV are the same, the weight of the test piece IV can be reduced.

In the above table, the specific strength and the specific elasticity are values obtained by dividing each numerical value by the weight of each of the test pieces I to IV, and indicate the strength per weight. The larger the value, the lighter and stronger it is.

Such a comparison is the same for the comparison between the test piece I and the test piece II.

(Effects) As described above, according to the present invention, the blade is integrally provided on the shaft, and the blade is formed by bonding at least one fiber-reinforced plastic plate to each of the two surfaces of the wooden core. In a stick having a striking surface formed thereon, at least one of the fiber-reinforced plastic plates has fibers aligned in one direction, and has an area at least approximately half the length of the blade from the toe tip of the blade. The has a portion in which the grain of the wooden core is oriented in a direction intersecting with the direction of the fibers of the fiber-reinforced plastic plate, and further, the wooden core,
Since the fiber reinforced plastic plate and the fiber reinforced plastic plate are bonded to each other with a soft thin film interposed therebetween, separation of the bonding surface between the wooden core material and the fiber reinforced plastic plate is prevented, and the impact acting on the blade is prevented. The present invention can provide a stick excellent in the effect of preventing the destruction of the fiber reinforced plastic plate or the blade and in which the scattering prevention is taken.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one embodiment of the stick of the present invention, FIG. 2 is a front view of the stick of the present invention, and FIGS. 3 to 5 show a fiber-reinforced plastic plate adhered to a wooden core. FIGS. 6 and 7 are explanatory diagrams showing examples of attaching a plurality of fiber-reinforced plastic plates, and FIGS. 8 to 11 are respectively a plurality of fiber-reinforced plastic plates and a wooden core. Explanatory diagram showing the attachment with the material, FIG. 12 and FIG.
FIG. 13 is a front view of a main part of a stick showing that a part of a shaft constitutes a part of a core material of a blade, and FIGS. 14 to 18 are main parts of a stick partially reinforced with a fiber-reinforced plastic plate. Front view, FIG. 19 is a cross-sectional view in the width direction of the blade portion in which the entire blade is covered with a protective material, FIGS. 20 and 21 are cross-sectional views similar to FIG. 19 in which the blade is partially covered with a protective material, FIG. 22 is a front view of a main part of a stick having a striking reinforcing member in which wood grains and / or fibers are oriented in a direction perpendicular to the striking face, FIG.
The figure is a sectional view along XXIII-XXIII in FIG. 22, and FIG.
23 is a cross-sectional view showing another example of the same position as in FIG. 25, FIG. 25 is an exploded perspective view of a stick with a soft thin film interposed, and FIG. 26 is a blade with a surface protection member integrated with a scattering prevention member. FIG. 27 is a cross-sectional view, FIG. 27 is an explanatory view showing a state in which a fiber-reinforced plastic plate of a cloth-like carbon woven fabric is pasted on an ABS resin core material, and FIG. 28 is a diagram in which fibers are aligned in one direction on an ABS resin core material. FIG. 29 is an explanatory diagram showing a state in which a fiber-reinforced plastic plate is attached, FIG. 29 is an explanatory diagram showing a state in which a fiber-reinforced plastic plate of cloth-like carbon woven cloth is attached to a wooden core material,
FIG. 30 is an explanatory view showing a state in which a fiber-reinforced plastic plate aligned in one direction is attached to a wooden core, and FIG. 31 is an explanatory view showing test conditions. 1 ... shaft, 3 ... blade, 3a ... heel, 3b ... toe, 3c ... top surface, 3d ... bottom surface, 3e ... toe tip surface, 4 ... scattering prevention member, 5 ... surface protection material 6 top protection material 7 bottom protection material A fiber reinforced plastic plate B protection material C wood core material D impact strengthening member G soft thin film

Claims (7)

(57) [Claims] 1. A stick in which a blade is provided integrally with a shaft, and the blade has a ball striking surface formed by bonding at least one fiber-reinforced plastic plate to each of both surfaces of a wooden core. At least one of the fiber reinforced plastic plates has fibers aligned in one direction, and in a region at least approximately half the length of the blade from the tip of the toe of the blade, the grain of the wooden core is the fiber. It has a portion oriented in a direction intersecting with the direction of the fibers of the reinforced plastic plate, and the wooden core and the fiber reinforced plastic plate are bonded to each other with a soft thin film interposed therebetween. Characterized by a stick. 2. A plurality of fiber-reinforced plastic plates in which fibers are aligned in one direction are arranged on at least one surface of the wooden core material so as to intersect with each other in a fiber direction. At least a half-length region of the blade has a portion where the grain of the wooden core is oriented in a direction intersecting with the direction of at least any one fiber of the fiber-reinforced plastic plate. 2. The stick according to claim 1, wherein the stick is provided. 3. The direction of the fiber of any one of the fiber-reinforced plastic plates comprising a plurality of wood grains of the wooden core is provided in a region at least half the length of the blade from the tip of the toe of the blade. 3. The stick according to claim 1, wherein the stick has a portion oriented in parallel. 4. A striking reinforcing member having a grain and / or fiber oriented in a direction perpendicular to the striking surface is provided on at least a part of the striking surface of the blade. Item 4. The stick according to any one of Items 1 to 3. 5. A wood grain of the wooden core is oriented in a width direction of the blade in an area at least half a length of the blade from a toe tip of the blade, and at least one of the fiber reinforced plastic plates is provided. The stick according to any one of claims 1 to 4, wherein the fiber has a portion oriented in the longitudinal direction of the blade. 6. A stick according to any one of claims 1 to 5, wherein a protective material is provided on any outermost surface of said blade. 7. The stick according to claim 6, wherein said protection member is integrated with a scattering prevention member.