JPH06246024A - Stick for ice hockey - Google Patents

Abstract

PURPOSE:To provide a stick for ice hockey which is capable of improving the rigidity while holding sufficiently large breaking strain. CONSTITUTION:A stick 1 for ice hockey is made of fiber reinforced plastic 2 having a hollow square section and glass fibers 2 introduced in the thickness portion. The corner portion D having the compression stress relatively higher than that in the other portions of the section only in the glass fibers 2 has only carbon fibers 2 extending longitudinally of the stick 1 and introduced in any one 4 of two durfaces B, C on which reaction vertically acts in hitting a pack, particularly in shooting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice hockey stick made of fiber reinforced plastic, and more particularly to an ice hockey stick made of fiber reinforced plastic into which glass fibers and carbon fibers are introduced.

[0002]

2. Description of the Related Art As shown in FIG. 5, an ice hockey stick 50 has a blade 51, which is called a puck, for hitting a ball, and is inserted and joined to its tip 50a. This is because the blade 51, which is more worn than the stick 50, can be replaced, and its cross-sectional shape is
As shown in FIG. 6, it has a hollow rectangular shape.

When the ice hockey stick 50 having such a structure hits the puck 52, as shown in FIG. 6, a person sliding on the ice presses the stick 50 against the ice surface 53 and slides it in the direction of the arrow. Then, the stick 50 is bent like a bow so as to be sufficiently bent, and the recoil of the bending strikes the puck 52 to give a greater speed to the puck.

Therefore, in order to strike the puck 52 for greater speed, the ice hockey stick 50, as described above, should be sufficiently bowed to bend and bow sufficiently to break back. Distortion and sufficiently high rigidity are required. In addition, the square size of the cross section is required to be small and light so that a person can easily hold the stick 50 and slide on the ice.

As a material for the ice hockey stick 50 as described above, glass fiber reinforced plastic, which is lighter than wood or net and has a large breaking strain, has been adopted in recent years. The glass fibers used in such glass fiber reinforced plastics are generally continuous glass fibers such as woven fabrics and rovings, which have a high rigidity and can withstand a large bending load. ) And a continuous pultrusion method. At this time, although the direction of the glass fiber for each layer is different, the fiber orientation configuration of each side of the cross section and the thickness of each side of the hollow rectangular cross section are the same.

[0006]

However, the size of the cross section of the stick 50 is naturally determined in consideration of its size and lightness so that a person can easily hold it on the ice and run it. As long as it is decided,
There is a problem that there is a limit in increasing the rigidity of the stick 50 by introducing only glass fiber.

Further, in order to increase the rigidity of the stick 50 having a fixed cross section, it is conceivable to uniformly orient the carbon fiber having a rigidity higher than that of the glass fiber together with the glass fiber in the stick 50. The fiber-reinforced plastic in which the amount of strain is less than that of glass fiber is greater than that of glass fiber, but the rigidity is increased, but the strain at break becomes small, and if the stick 50 is curved like a bow immediately before hitting the pack, the carbon fiber will have compressive stress. Then, it is crushed by compression, and there is a problem in that a sufficient yield cannot be obtained.

The present invention has been made in view of the above problems of the prior art, and an object thereof is an ice hockey capable of improving rigidity while maintaining a sufficiently large breaking strain. Is to provide a stick for use.

[0009]

In order to achieve the above object, an ice hockey stick of the present invention is a reinforced ice hockey stick made of fiber reinforced plastic having a hollow cross section and glass fibers introduced into its thickness portion. Only the glass fiber is used in the corner part of the stick where the stress is relatively higher than the other parts of the cross section. Of the two surfaces where the reaction force when hitting the pack, especially when shooting, acts vertically In either of the above, carbon fibers extending in the longitudinal direction of the stick are introduced.

[0010]

[Operation] The stress becomes relatively higher than other parts of the cross section,
Only the glass fiber is used in the corners where a sufficiently large breaking strain is required, and the reaction force when hitting the pack acts vertically, excluding the corners of either one of the two faces where the largest strain occurs. When carbon fibers are introduced into the flat part in the longitudinal direction of the stick, the stick has a breaking strain sufficiently large as that of the reinforced plastic containing only glass fibers, and the carbon fibers are sufficiently compressed without being crushed. The stiffness of the fiber tries to restore its bending. Then, the momentum is applied to the puck to give the puck more speed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a diagram showing a cross section of an ice hockey stick 1 according to an embodiment of the present invention, FIG. 2 is a diagram showing a strain distribution of the ice hockey stick 1 according to an embodiment of the present invention, and FIG. FIG. 4 is a graph showing the maximum strain generated on two surfaces where the reaction force at the time of striking the puck acts perpendicularly and gives the largest strain when a prescribed deflection is given. FIG. 4 is a stick for ice hockey according to the present invention. It is a graph of the load with respect to the deflection of.

An ice hockey stick 1 according to the present invention shown in FIG. 1 has a glass fiber reinforced plastic 2 as a whole.
Except for the corner part D where the compressive stress is relatively higher than the other parts of the cross section on the B side, which is one of the two surfaces B and C on which the reaction force when hitting the pack acts vertically. In the drawing, the carbon fiber bundle 3 is introduced so as to extend widely and thinly and uniformly in the longitudinal direction of the stick 1 only in the flat portion 4 separated by the two-dot chain line in the figure.

When the carbon fiber bundle 3 is thus introduced,
As shown in FIG. 2, the neutral surface position F of the strain moves to the carbon fiber 3 introduction side when the pack is hit. In FIG. 2, the right diagram shows the strain distribution, and (a) is the case of an ice hockey stick made of fiber reinforced plastic containing only glass fibers. When hitting the puck, the neutral plane position F of the strain is the stick. Since it is at the center of the stress, the stress having the same absolute value acts on both of the linear portions on which the tensile stress or the compressive stress acts, and the equal strain occurs.

However, in the case of the ice hockey stick 1 according to one embodiment of the present invention, as shown in (b), the neutral surface position F of the strain is disregarded regardless of which side is the hitting side.
Moves to the surface B on the carbon fiber 3 introduction side. This is because the rigidity of the surface B on the carbon fiber 3 introduction side is greater than the rigidity of the surface C of the glass fiber alone. Therefore, even if the same bending as that of the fiber reinforced plastic ice hockey stick of FIG. 2A is applied, the strain on the carbon fiber 3 introduction side becomes small.

On the other hand, the strain of the surface C of only the glass fiber is larger than that in the case of FIG. 2A, but since the compressive fracture strain of the glass fiber is about twice that of the carbon fiber 3, the strain is large to some extent. It doesn't destroy even if it becomes Since the neutral plane position F can be changed depending on the amount of the carbon fibers 3 on the carbon fiber 3 introduction side, the strain on both planes can be freely designed. Therefore, the strain of the carbon fiber 3 introduction surface B can be selected so that it does not exceed the compressive fracture strain of the carbon fiber 3, and the strain of the surface C of only the glass fiber does not exceed the compressive fracture strain of the glass fiber. .

As a result, a breaking strain as large as that of the ice hockey stick made of fiber reinforced plastic made of only glass fibers can be obtained without compressing and breaking the bundle 3 of carbon fibers.

As described above, in the ice hockey stick 1 of the present invention, the compressive stress becomes relatively higher than that of the other portions of the cross section, and only the glass fiber 2 is packed in the corner D portion where a sufficiently large breaking strain is required. Carbon fiber 3 in the longitudinal direction of the stick on the B side, which is one of the two surfaces B and C, where the reaction force at the time of hitting acts vertically to cause the largest distortion.
Therefore, the stick 1 has a breaking strain sufficiently large as the fiber reinforced plastic having only glass fiber without causing the carbon fiber 3 to be compressed and broken, and has a rigidity of the carbon fiber 3 higher than that of the glass fiber. I try to restore that bend. As a result, it tries to return to its original shape with higher rigidity, which gives more speed when the pack is hit with that momentum.

FIG. 3 shows the calculation result of the maximum strain generated on the two surfaces B and C perpendicular to the reaction force when the prescribed deflection is applied. Referring to FIG. 3, Comparative Example 1 is an ice hockey stick in which plastics reinforced by glass fibers are evenly oriented on both sides of the two surfaces where the reaction force when the carbon fiber hits the pack acts perpendicularly and the largest distortion occurs. 1 shows the case where the load side is the C surface in the ice hockey stick 1 of the present invention shown in FIG. 1, and Example 2 shows the ice hockey stick 1 of the present invention shown in FIG. Shows the case where the load side is the B surface. And, ● is the maximum strain on the C surface side, ◯ is the maximum strain on the B surface side, H is the compressive fracture strain of carbon fiber, and I is the compressive fracture strain of glass fiber.

When the carbon fibers are evenly arranged on both sides as in Comparative Example 1, the maximum strains on both sides exceed the compressive fracture strain H of the carbon fibers. In the ice hockey stick 1, the maximum strain of the carbon fiber 3 introduction surface B does not exceed the compressive fracture strain H of the carbon fiber 3, and the maximum strain of the glass fiber only surface C exceeds the compressive fracture strain I of the glass fiber. Absent.

FIG. 4 shows the result of the bending test under load of the ice hockey stick of the present invention shown in FIG. The solid line shows the ice hockey stick 1 of the present invention, the one-dot chain line shows the plastic ice hockey stick reinforced with only glass fiber without introducing carbon fiber as the comparative example 2, and the two-dot chain line shows the comparative example. 3 shows an ice hockey stick in which carbon fibers are widely and thinly and uniformly oriented in a plastic reinforced with glass fiber as No. 3.

Comparative Example 2 of a plastic ice hockey stick reinforced only with glass fibers without introducing carbon fibers has a breaking strain of E1 which is a sufficiently large value. Shows that the strength is gentle and the rigidity is not so high, and the momentum to restore the bending is small.

Comparative Example 3 of the ice hockey stick in which the carbon fiber is widely and thinly and uniformly oriented in the plastic reinforced with the glass fiber, the inclination up to the breaking strain E2 is high and the rigidity is high, but the breaking strain E2 is compared. It is smaller than the breaking strain E1 of Example 2, indicating that sufficient bending cannot be obtained.

On the other hand, in the embodiment of the present invention, the breaking strain E1 is sufficiently large as in Comparative Example 2 and the breaking strain E
It can be seen that the inclination up to 1 is as large as in Comparative Example 3 and the rigidity is high.

In FIG. 1, although the carbon fiber 3 is introduced on the B side in the above embodiment, it may be on the C side. or,
When the carbon fiber 3 is oriented on the side surface G that does not become a striking surface, the effect is not so great as to orient the carbon fiber 3 on the side B or C on which compressive stress or tensile stress acts, but also on the side surface G. Similarly, if the carbon fiber 3 is oriented so as not to exceed the breaking strain, the rigidity of the stick can be further increased while avoiding the breaking.

[0025]

INDUSTRIAL APPLICABILITY The ice hockey stick of the present invention is an ice hockey stick made of a fiber reinforced plastic having a hollow cross section and glass fibers introduced into the thickness portion, and has a compressive stress other than that of the cross section. Only the glass fiber in the corner part which is relatively higher than the part extends in the longitudinal direction of the stick on one of the two surfaces where the reaction force when hitting the pack, especially when shooting, is perpendicular. Since the carbon fiber to be used is introduced, the stick has a breaking strain sufficiently large as that of the reinforced plastic containing only the glass fiber without the carbon fiber being compressed and broken, and the stick has a carbon fiber rigidity higher than that of the glass fiber. I try to restore that bend.

As a result, the rigidity of the entire stick is improved as compared with the conventional stick for ice hockey made of the reinforced plastic containing only glass fiber. Then, when the pack is hit with the momentum of the stick that tries to return to the original with higher rigidity, it becomes possible to give a higher speed to the pack.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of an ice hockey stick of the present invention.

FIG. 2 is a diagram showing a strain distribution of the ice hockey stick of the present invention.

FIG. 3 is a graph showing the calculation result of the maximum strain in the case where the ice hockey stick of the present invention is provided with a prescribed deflection.

FIG. 4 is a graph of a load against bending of the ice hockey stick of the present invention.

FIG. 5 is a diagram showing an ice hockey stick.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is an operation diagram of an ice hockey stick.

[Explanation of symbols]

 1 Ice Hockey Stick 2 Glass Fiber Reinforced Plastic 3 Carbon Fiber 4 Carbon Fiber Introduced Area B Surface where Reaction Force Acts Vertically C Surface where Reaction Force Acts Vertically D Corner

Claims (1)

[Claims] 1. An ice hockey stick made of fiber reinforced plastic having a hollow cross section and glass fibers introduced into a thick portion, wherein a corner portion where stress is relatively higher than other portions of the cross section An ice hockey stick in which only glass fibers are introduced with carbon fibers extending in the longitudinal direction of the stick on one of the two surfaces on which the reaction force when hitting the puck vertically acts.