JP2008237857A - Reinforced wooden bat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforced wooden bat whose durability is improved, which hardly breaks, has a wider sweet spot, and improves reactive force and a batting average and a distance of a hit ball by reinforcing a taper part, whereas a conventional wooden bat of which only a ball hitting part is reinforced is weak in the taper part, does not hit a ball farther, and is not durable. <P>SOLUTION: Synthetic resin is pressure injected deep inside a part ranging from a taper part 4 to a grip end 5 except a ball hitting part 2 and is hardened to reinforce the taper part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a reinforced wooden bat used for hitting with baseball and softball.

Wooden bats are said to have less repulsive force than metal bats and do not extend the flight distance. The reason is that the taper portion of the wooden bat has a large deflection, the bat that is bent at the time of hitting has a long time to return to the original, and the sweet spot is narrow. On the other hand, metal bats are generally said to have higher repulsive force and longer flight distance than wooden bats. The reason is that there is little deflection of the taper portion, the time for the bat that is bent at the time of hitting the ball to return to the original time is short, and the sweet spot is wide. The conventional wooden bat has a good shot feeling, but the sweet spot is narrow, the flight distance does not increase, and it is easy to break. (See, for example, Japanese Patent Laid-Open No. 2004-260688).
JP 2006-51063 A

  In the bat described in Patent Document 1, in order to obtain durability and resilience, a synthetic resin is pressure-injected / cured into the hitting ball portion, but by injecting / curing the synthetic resin into the hitting ball portion, Although the resilience increases, on the other hand, since the ball striking surface that catches the ball is hard, the ball slips at the time of hitting, the ball does not rotate, and the ball is estimated to be stalled. Further, since the synthetic resin is not pressurized and injected only into the inner surface of the bat but only on the surface, it does not lead to reinforcement of the entire bat.

  It has been found that the material increases in weight and strength by about 1.5 times by pressurizing and curing the synthetic resin up to the inner center of the material of the wooden bat. Focusing on the fact that this effect can be used to change the strength and balance of wooden bats and to bring out features not found in conventional wooden bats, in addition to the conventional method of impregnating the surface of wooden bats with synthetic resin, the tapered part or grip A reinforced wooden bat is invented by pressure-injecting and curing a synthetic resin to the inner part of the head or the top of the head. By injecting and curing synthetic resin to the inner center of the taper, which is unique to wooden bats, when the ball is hit, the taper is strengthened to achieve a strong and small deflection of the taper similar to or close to that of a metal bat. The object of the present invention is to provide a reinforced wooden bat that has a strong repulsive force and a wide sweet spot while being a wooden bat.

  In order to achieve the above object, the present invention comprises a normal batted ball portion, a tapered portion, a grip portion, and a wooden bat provided with a grip end, and the longitudinal direction from the tapered portion to the grip end excluding the hitting ball portion of the wooden bat. Further, it is characterized in that the synthetic resin is pressure-injected and cured to the inner core.

  Further, the second problem-solving means is characterized in that a synthetic resin is pressure-injected and cured to the inner center in the longitudinal direction of the tapered portion of the intermediate portion of the grip and the hitting ball portion of the reinforced wooden bat. .

  A third problem solving means is characterized in that, in the present invention according to claim 1 and claim 2, synthetic resin is pressure-injected and hardened to the top of the head of the reinforced wooden bat. To do.

  According to a fourth aspect of the present invention, in the present invention according to claim 1 and claim 2, the resin injected into the reinforced wooden bat includes at least two kinds of different resins such as vegetable resin or synthetic resin. It is characterized by being layered and pressurized and injected in a roll along the inner center of the bat.

  The operation of the first problem solving means is as follows. If the ball hitting part that hits the ball of the bat is considered as the point of action, the grip part gripped by the hand is considered as the force point, and the part that becomes the taper part below the ball hitting part as the fulcrum, the fulcrum between the force point and the action point is It has an element that can increase or decrease the force at the point of action. By injecting and hardening the synthetic resin to the taper portion serving as the fulcrum, the taper portion can be maximally strengthened and the force of the hit ball portion serving as the action point of the wooden bat can be increased. By strengthening the taper part which bends greatly at the time of hitting the ball, the deflection can be reduced, thereby making it possible to widen the sweet spot than the conventional wooden bat and increase the repulsive force and extend the flight distance. Moreover, by injecting synthetic resin from the taper portion to the grip end to the inner center portion, the weight of the taper portion increases, and a hand-balance bat can be made.

  In addition, the action of the second problem solving means is to inject and cure synthetic resin only on the taper portion serving as a fulcrum, thereby strengthening the taper portion that affects deflection and strengthening the repulsive force of the wooden bat. be able to. Moreover, although it is a wooden bat, the striking surface and the grip surface can widen the sweet spot without impairing the feel and feel of a normal wooden bat, and can further increase the flight distance. Further, by pressurizing and hardening the synthetic resin to the taper portion up to the inner core portion, the weight of the taper portion increases and a middle balance bat can be made.

  In addition, the action of the third problem solving means is that the reinforced wood is about 1.5 times heavier by pressurizing and curing the synthetic resin to the inner core of the material. By pressurizing and injecting the synthetic resin to the inner core, the same effect as that of attaching a weight to a normal wooden bat head appears, and the head balance can be adjusted.

  In addition, the action of the fourth solution means that, for example, at least two kinds of resins such as vegetable resin or synthetic resin having different properties such as soft resin, hard resin, soft resin, etc. are made into multiple layers and rolled along the inner center of the bat. By injecting and curing into a shape, the strength of the bat can be increased, and a safe and economical bat that is hard to break can be made.

  As described above, according to the present invention, the synthetic resin is pressure-injected and cured to the innermost portion of the taper portion that is the middle portion between the head and the grip of the reinforced wooden bat. As a result, the tapered portion which is a weak point is strengthened, and by strengthening, the deflection of the tapered portion can be reduced, and a bat having a strong repulsive force can be provided. Moreover, by pressurizing and injecting plant resin or synthetic resin to the inner core, the hand side becomes heavier, and a bat that can be hand-balanced while being a wooden bat can be provided.

  Further, in the present invention according to claim 2, since the synthetic resin is not injected into the hitting portion and the grip portion under pressure and is not hardened, the feel of hitting and the grip grip is a wooden bat that is the same as before. It can be used without any sense of incongruity, and it is possible to obtain a hit ball in which the ball is rotated, which is a characteristic of a wooden bat.

  According to the third aspect of the present invention, a synthetic resin is pressure-injected and hardened to the inner end of the head, and the weight of the head can be adjusted by the injection amount of the synthetic resin. While there is, you can practice swinging with attention to head balance and batting.

  Further, according to the present invention of claim 4, the strength of the bat can be further improved by forming multiple layers of vegetable resin or synthetic resin having different properties and pressurizing and curing to the inner core. A difficult bat can be realized. By injecting environmentally friendly resin, it is possible to provide a reinforced wooden bat that is kind to the environment and a wooden bat that is hard to break and highly safe and economical.

  The sweet spot of a normal wooden bat is about 11.3 cm long when the ball is caught at 90 degrees from the throwing direction, but in the case of a metal bat, the sweet spot is a wooden spot. Since it is about three times as wide as the bat, and therefore the portion for catching the ball is widened, the batting ratio and the flight distance are improved compared to the wooden bat. INDUSTRIAL APPLICABILITY The present invention can provide a reinforced wooden bat having a high repulsive force for expanding the sweet spot and improving the hitting rate and flying distance by reinforcing the tapered portion and reducing the deflection at the time of hitting.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. However, the present invention is not limited by each embodiment, and the following embodiment is described as an example of the reinforced wooden bat of the present invention, and is limited to the section of this description. is not.

  1 shows a side view of a reinforced wooden bat, 2 is a hitting ball part (operation point), 3 is a grip part (power point), 4 is a taper part (fulcrum), 5 is a grip end, 6 represents a sweet spot, and 7 represents a portion where a synthetic resin is injected under pressure and cured.

  In FIG. 2, 8 is a portion where the synthetic resin is pressure-injected and cured to the top of the reinforced wooden bat, and 9 is a portion where the synthetic resin is pressure-injected from the taper portion to the grip end.

  In FIG. 3, reference numeral 10 denotes a portion where the synthetic resin is pressure-injected / cured into the tapered portion.

  In FIG. 4, reference numeral 10 'denotes a cross section of a reinforced wooden bat in which a synthetic resin is pressure-injected and cured in a tapered portion.

  In FIG. 5, 11 is a hard synthetic resin, 12 is a soft synthetic resin, 13 is a hard synthetic resin, and the like. It shows a cross section of the bat. Moreover, 14 of FIG. 5 represents another example which inject | pours a synthetic resin.

  The meaning of the above configuration will be described below. The grip part (force point) gripped by the hand of 3 and the hitting ball part (action point) for hitting the ball of 2 are located between the force point and the action point, and the fulcrum part where the force of the action point can be increased or decreased, When considering the 4 taper portion (fulcrum), the portion where the flying distance and the repulsive force are increased or decreased at the time of hitting the ball is inevitably considered as the 4 taper portion (fulcrum). This 4 taper portion (fulcrum) gradually becomes thinner from the 2 hitting ball portion (operation point) to the 3 gripping portion (power point), and is the portion where the deflection is greatest at the time of hitting, which is also the same in terms of strength. It is the weakest part. By reinforcing and injecting resin from the 4 taper portion to the 5 grip portion to the inner center portion, the 4 taper portion can be strengthened.

  The reason why the synthetic resin is pressure-injected and cured from the taper part 4 to the grip end 5 is that the taper part of the wooden bat has a large deflection, so that the energy transmitted to the ball at the time of hitting is lost and the repulsive force against the ball is reduced It was low. On the other hand, the taper portion of the metal bat has little deflection, and therefore, the energy transmitted to the ball is less consumed at the time of hitting, and the repulsive force against the ball is high. The present invention pays attention to the fact that it is not the hitting ball part but the taper part of the bat that increases the repulsive force against the ball, and the taper part and the grip part are cured by pressurizing and curing resin to cure the taper part. We decided to achieve a reinforced wooden bat with less deflection. As a result, the sweet spot spreads, and a reinforced wooden bat that increases the repulsive force and the flight distance is obtained.

  Further, the weight of the head, center, and hand is adjusted by the pressure injection amount of the synthetic resin to the top of the head 8 and 9, 10 to obtain a reinforced wooden bat that can adjust the head balance, middle balance, and hand balance.

  10 'is a cross-sectional view of a reinforced wooden bat in which synthetic resin is pressure-injected and cured, but as shown in the figure, by compressing and injecting synthetic resin up to the center of the wooden bat material, The weight and hardness are about 1.5 times that of a normal material, and the strength and hardening of the tapered portion and the grip portion can be realized and the sweet spot can be widened.

  11 to 14 are cross-sectional views showing an example of injecting vegetable resin or chemically synthesized resin. In Nos. 11 to 13, the repulsive force and strength are further improved by injecting the resin having different viscosities and properties. No. 14 injects the resin into a ginkgo shape, thereby strengthening the strength of the tapered portion of the bat and bringing about the effect of expanding the sweet spot.

  Side view of reinforced wooden bat   Side view of the same reinforced wooden bat   Side view of the same reinforced wooden bat   Sectional view of the resin injection part from the taper part to the grip part   An example of the cross section of the resin injection part from the taper part to the grip part

Explanation of symbols

1 Reinforced wooden bat 2 Hitting ball part (point of action)
3 Grip part (power point)
4 Tapered part (fulcrum)
5 Grip end 6 Sweet spot 7 Portion where plastic resin is injected and hardened 8 Portion where plastic is injected and hardened to the top of a reinforced wooden bat 9 Pressurize synthetic resin from taper to grip Portion to be injected / cured 10 Portion for injecting / curing synthetic resin to taper portion 10 'Sectional view of the portion to inject / harden synthetic resin to taper portion 11 Sectional view of synthetic resin for pressure injection to taper portion 12 Cross-sectional view of synthetic resin to be pressure-injected into tapered portion 13 Cross-sectional view of synthetic resin to be pressure-injected into tapered portion 14 Example of cross section of synthetic resin-injected portion into tapered portion

Claims (4)

  It consists of a wooden bat equipped with a normal hitting ball part, taper part, grip part, and grip end, excluding the hitting part of the wooden bat, and injecting synthetic resin into the inner part in the longitudinal direction from the taper part to the grip end. Reinforced wooden bat characterized by curing.   A reinforced wooden bat, wherein synthetic resin is injected and cured to the inner center in the longitudinal direction of the taper portion of the intermediate portion of the hitting ball portion and the grip portion of the reinforced wooden bat.   3. The reinforced wooden bat according to claim 1, wherein a synthetic resin is pressure-injected and hardened to the top of the top of the reinforced wooden bat.   The resin to be injected into the reinforced wooden bat is formed by multiple layers of at least two different resins such as vegetable resin or synthetic resin, and is injected and cured in a roll shape along the inner center of the bat. 1. A reinforced wooden bat according to claim 2.

Images