JPH04133863U - sports butt - Google Patents

Abstract

(57) [Summary] [Objective] To provide a sports bat made of fiber-reinforced plastic, which can have rigidity and elasticity set appropriately and can prevent impact transmission from a striking part to a grip part. [Structure] This bat 10 includes a hitting part 12, a grip part 14, and an elastic curved part 16 located between them and integrally formed therewith. It also includes a layered outer shell made of fiber-reinforced plastic and having a predetermined wall thickness. A plurality of fiber cutting parts or slits 32 are provided in the connection area between the grip part 14 and the elastic curved part 16. slit 3
The number of fibers cut at 2 accounts for about 25% of the total number of fibers in the connection area. The connection area provided with the slit 32 is covered with a covering layer 34 of plastic material.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to sports bats used for example in baseball and softball, especially Made of fiber-reinforced plastic, it has moderate elasticity and cushions the impact when struck. Regarding sports bats that can be used for sports.

0002

[Conventional technology]

Although wooden bats have a moderate amount of elasticity, they break easily. On the other hand, hollow gold Attribute bats are hard to break, but they lack elasticity, and the weight of the bat itself is carefully controlled during manufacturing. It is not easy to control accurately. For this reason, fiber-reinforced plastic bats being developed. Fiber-reinforced plastic bat allows for more precise control of its weight It has better strength than a wooden bat, but its rigidity cannot be precisely controlled. I can't control it.

0003 As is well known, a bat (for example, a baseball bat) curves at the moment it hits the ball. However, the diameter of the ball is reduced to about 3/4 so that it is in close contact with the hitting part of the bat while still being able to interact with the bat. Moving forward together. When the bat stops bending after catching the ball, the elastic force of the bat is reach maximum limit. In this state, the batter's swing force begins to be transmitted to the ball, and the batter's swing force begins to transfer to the ball. Le gains the power to fly to maximum distance. In other words, the elastic force of the bat is at its maximum Carrying the ball with the bat while it reaches and stops curving will cause the ball to travel farther. This is essential for flying far away. Therefore, the stiffness of the bat is too high and the elastic force is If it's too big, the ball will be hit before the batter's swing force is transferred to the ball. It tends to move away from the bat, so the ball doesn't fly as far. On the other hand, If the bat does not have sufficient rigidity and elasticity, the bat will bend at the moment it hits the ball. If the pitch is too high, the contact time between the bat and the ball will be longer, which will reduce the batter's swing power. He can't concentrate on the ball, and the ball doesn't fly far.

0004

[Problem that the idea aims to solve] The thickness of the hitting part of conventional fiber-reinforced plastic bats is It is extremely thick to prevent it from breaking. This increases the rigidity of the bat. As mentioned above, the problem is that the batter's swing power is not sufficiently transmitted to the ball. There is. Additionally, the outer layer of conventional fiber-reinforced plastic bats is generally made of epoxy resin. It is made up of multiple fiberboards impregnated with carbon dioxide, giving it a uniform structure throughout. death Therefore, the impact generated on the hitting part of the bat by hitting the ball can be prevented. The ball is transmitted to the grip of the bat without being affected, and this allows the ball to be hit while holding the bat. This will cause injury to both hands of the person.

[0005] In view of the above, the main purpose of this invention is to set the rigidity and elasticity as necessary. The purpose of the present invention is to provide a sports bat made of fiber-reinforced plastic. Another purpose of this invention is to reduce the impact from the hitting part of the bat to the grip part. Sports bags made of fiber-reinforced plastic with effective means to prevent transmission The aim is to provide the following.

[0006]

[Means and actions for solving the problem]

In order to achieve the above object, the sports bat according to the present invention has a striking part, a grip, the grip part, and the part located between the striking part and the grip part and integrated therewith. An elastic curved portion is formed. This batt also consists of fibers with a predetermined wall thickness. It has a layered outer shell made of reinforced plastic. The grip part and bullet in this layered outer shell A plurality of fiber cutting parts are provided in the connection area with the flexible curved part. And these The number of fibers cut at the fiber cutting section is 5 of the total number of fibers in the connection area. It is characterized by having a predetermined ratio of % to 95%. These fiber cuts is a mechanism that prevents the transmission of impact from the striking part of the bat to the grip part during batting. fulfill one's duties. Furthermore, the rigidity and elasticity of the striking part are determined by the fiber cutting part placed in the connection area. Therefore, the rigidity and elasticity of the grip part and the elastic curved part are different. become. In other words, the rigidity and Elasticity can be adjusted by selecting the number of fibers cut by the fiber cutting section. , so you can get the best hitting effect. Furthermore, the above connection area is coated. A cover layer made of a high molecular weight polymer can be used to cover the connection area. It serves to protect and absorb the remaining impact.

[0007] Furthermore, in a sports bat according to a preferred embodiment of the present invention, the above-mentioned coating layer is suitable. It is characterized by having a suitable number of buried objects. These buried objects are, for example, metal, Materials with specified rigidity such as composite materials, wood, ceramics, fiber reinforced plastics, etc. Consisting of In addition, from the standpoint of absorbing residual impact, buried objects such as plastic or rubber may be It can also be made from shock-absorbing materials such as foam, foamed plastic materials, etc. Current However, some of these buried objects are made of materials with a certain rigidity, and others are made of shock absorbing materials. It can also be made from available materials.

[0008]

【Example】

Hereinafter, the present invention will be explained in detail by some preferred embodiments with reference to the accompanying drawings. I will clarify. Referring to FIGS. 1 to 7, a sports bat 10 (hereinafter simply referred to as a bat) according to the present invention is shown. 10) includes a striking part 12, a grip part 14, and a combination of the striking part 12 and the grip. The elastic curved portion 16 is located between the portion 14 and integrally formed therewith. Ru. The bat 10 includes a layered outer shell 20 having a multilayer structure, and the layered outer shell 20 is made of fiber reinforced plastic. It is formed by pressure molding using stick material. Therefore, the bat 10 is, e.g. For example, it is formed from a plurality of carbon fiber boards pre-impregnated with epoxy resin. these The carbon fiber board is wound so that its own fibers are oriented in a predetermined direction. . The carbon fiber board thus wound is placed in a mold and heated and pressurized to form a bat 10. molded.

[0009] A preferred embodiment 1 of the present invention is shown in FIGS. 1 and 2. The bat 10 according to Example 1 is , on the surface of the connection area 30 between the grip part 14 and the elastic curved part 16, a plurality of irregularly arranged A slit 32 of a predetermined depth and a predetermined length is provided. In this slit 32 The fibers of the layered outer shell 20 are cut in the connecting region 3, and the number of cut fibers increases in the connection area 3. It accounts for about 25% of the total number of fibers in 0. Furthermore, the contact including the grip part 14 A coating layer 34 made of a plastic material is applied to the surface of the connection area 30 by injection molding. Cover. As a result, the striking portion 12 of the bat 10 has a wall thickness of its layered outer shell 20. It can be formed thicker than the lip portion 14. In this way, the connection area 30 is A coating layer 34 is provided on the surface including the grip portion 14. to provide greater stiffness and elasticity to the connection area 30 and to cover the By adjusting the number of lits 32, an optimal impact effect can be obtained. Also, the blow At times, the impact transmitted from the striking part 12 of the bat 10 to the grip part 14 is transmitted through the slit 32. effectively prevented by. Furthermore, the remaining impact is absorbed by the coating layer 34. , the impact transmitted to the batter's hands is minimized.

0010 3 and 4 show another preferred embodiment 2 of the present invention. Bat 1 according to Example 2 0, an annular recess 50 is formed in the connection area between the grip part 14 and the elastic curved part 16. There is. The surface of the annular recess 50 has a plurality of irregularly arranged slits 52 and transparent holes. A hole 54 is provided. Number of fibers cut in these slits 52 and through holes 54 occupies about 40% of the total number of fibers in the annular recess 50. Furthermore, the annular recess 50 is coated with a plastic covering layer 56 by injection molding. The annular recess 50 Before coating with the coating layer 56, a plurality of fiber-reinforced plastics are coated as necessary. A reinforcing piece 58 can be embedded in the annular recess 50. These slits 52, transparent Transmission of impact from the striking part 12 to the grip part 14 through the holes 54 and the coating layer 56 By embedding the reinforcing piece 58, the rigidity and strength of the bat 10 are improved. and elasticity is increased.

[0011] Another preferred embodiment 3 of the present invention is shown in FIGS. 5-7. Bag according to Example 3 10 is provided with eight grooves 59 on the surface of the annular recess 50. Each groove 59 is mutually They are equally spaced apart and arranged parallel to the longitudinal axis of bat 10. These grooves 5 A plurality of slits 60 and through holes 62 arranged irregularly are provided between the holes 9 . child The number of fibers cut in these slits 60 and through holes 62 is equal to the number of fibers cut in the annular recess 50. It accounts for about 60% of the total number of fibers. Furthermore, in Example 3, the annular recess 50 is Reinforcing pieces 63 made of fiber-reinforced plastic are inserted into some of the grooves 59, and other A plastic shock-absorbing piece 64 can be fitted into the groove 59 . Moreover, In addition, a plastic covering layer 70 is placed in the annular recess 50 to absorb the remaining impact. Cover. In this way, the bat 10 of Example 3 provides sufficient strength to the striking portion 12. On the other hand, the slit prevents the impact transmitted from the striking part 12 to the grip part 14 at the time of striking. 60, the through hole 62, the shock absorbing piece 64, and the covering layer 70. I can do that. In addition, the optimum stiffness of the elastic curved portion 16 for obtaining the optimum impact effect is also provided. The strength can be adjusted by appropriate use of reinforcing pieces 63 that fit into the slits 60. Wear.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a preferred embodiment 1 of the present invention, where the covering layer is shown by a transparent layer.

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1;

FIG. 3 is a perspective view of a second preferred embodiment of the present invention, where the covering layer is shown by a transparent layer;

FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is a perspective view of a third preferred embodiment of the present invention, where the covering layer is shown by a transparent layer.

6 is a cross-sectional view taken along line 6-6 of FIG. 5. FIG.

7 is a cross-sectional view taken along line 7-7 of FIG. 5. FIG.

[Explanation of symbols]

10...Sports bat 12...Blowing part 14...Grip part 16...Elastic curved part 20...Layered outer shell 30…Connection area 32, 52, 60…slit 34, 56, 70…covering layer 50...Annular recess 54, 62...Through hole 58, 63...Reinforcement piece 59...Groove

Claims (11)

[Scope of utility model registration request] 1. A sports bat comprising a hitting part, a grip part, and an elastic curved part located between and integrally formed with the hitting part and the grip part, which is made of fiber-reinforced plastic and has a predetermined shape. a layered outer shell having a wall thickness, a plurality of fiber cutting parts of various shapes are provided in the connecting region of the grip part and the elastic curved part in the layered outer shell, and fibers cut at the fiber cutting parts are provided. A sports bat characterized in that the number of fibers is 5% to 95% of the total number of fibers in the connection area. 2. The sports bat according to claim 1, wherein the fiber cutting portion is a slit having a predetermined width. 3. The sports bat according to claim 1, wherein the fiber cutting portion is a through hole having a predetermined diameter. 4. The sports bat according to claim 1, wherein the connection region is covered with a coating layer made of a high molecular weight polymer. 5. A recess having a predetermined depth and length is provided in the layered outer shell located in the connection region, and the recess is provided with the fiber cut portion and covered by the covering layer. sports bat. 6. The sports bat according to claim 4, wherein the covering layer includes a plurality of embedded objects made of a predetermined material. 7. The sports bat according to claim 4, wherein a plurality of equally spaced grooves are provided in the connection region, and an embedded object made of a predetermined material is fitted into each of these grooves. 8. The sports bat according to claim 5, wherein the recess has an annular shape centered on the longitudinal axis of the bat. 9. The sports bat according to claim 5, wherein the recess has a plurality of equally spaced grooves on its surface, and an embedded object made of a predetermined material is fitted into each of these grooves. 10. The sports bat according to claim 6, wherein the buried object is made of a material having a predetermined rigidity. 11. The sports bat according to claim 6, wherein the buried object is made of a material having shock absorbing properties.