WO2016035815A1 - 複合型バット構造 - Google Patents
複合型バット構造 Download PDFInfo
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- WO2016035815A1 WO2016035815A1 PCT/JP2015/074936 JP2015074936W WO2016035815A1 WO 2016035815 A1 WO2016035815 A1 WO 2016035815A1 JP 2015074936 W JP2015074936 W JP 2015074936W WO 2016035815 A1 WO2016035815 A1 WO 2016035815A1
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- grip
- hand
- bat
- finger
- center
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/50—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball
- A63B59/51—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball made of metal
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/50—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball
- A63B59/54—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball made of plastic
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/50—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball
- A63B59/58—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball characterised by the shape
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/08—Handles characterised by the material
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/10—Handles with means for indicating correct holding positions
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/12—Handles contoured according to the anatomy of the user's hand
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/18—Baseball, rounders or similar games
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
- A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/50—Substantially rod-shaped bats for hitting a ball in the air, e.g. for baseball
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/06—Handles
- A63B60/14—Coverings specially adapted for handles, e.g. sleeves or ribbons
Definitions
- the present invention relates to an improvement of a composite bat in which a body portion made of a metal cylindrical body and a grip portion made of FRP are connected to different members.
- the body part made of metal cylinder and the grip part made of FRP are connected to bring the center of gravity of the body part close to the center of impact and transmit the maximum impact energy, while the grip form of the bottom grip is locked as a palm grip.
- the present invention relates to a composite bat structure devised to obtain the maximum bat swing angular velocity.
- Patent Document 1 A composite-type bat structure that relaxes transmission is proposed (Patent Document 1).
- Patent Document 2 a joining member that alleviates the impact from the body portion to the grip portion is interposed in the joint portion, an obstacle occurs in energy transmission from the grip to the striking body portion. Therefore, there has been proposed a bat structure in which the hitting body portion and the grip portion are firmly interconnected (Patent Document 2).
- vibration transmission from the body part to the grip part and transmission of impact energy from the grip part to the metal body part are related as a form in which the metal body part having the hitting center and the grip part giving the hitting rotational energy are joined.
- Patent Document 1 a vibration damping type
- Patent Document 2 a rigid body connection type
- Non-Patent Document 1 Non-Patent Document 1
- various grip structures have been proposed (Patent Documents 3 and 4).
- an inclination angle is provided between the grip portion of the substantially circular cross section and the knob-shaped grip end, and the short palm and the little finger abductor of the bottom grip are supported on the lower edge of the grip end.
- a grip structure is proposed that forms a gently curved support surface to improve the grip strength during swing.
- the grip part of the bottom hand has a non-circular cross section, and an asymmetric flare-shaped part is formed on the grip part on the upper part of the grip part of the non-circular cross section. It is intended to make a grip.
- the new grip structure has a non-circular cross section instead of a circular cross section, and because the grip end has an irregular shape such as an irregular shape, it is impossible to manufacture the grip part integrally with the body part. It is difficult, and it has also been proposed to join the impact drum and grip (Patent Document 5).
- the metal bat has a sweet spot wider than that of wood and is located on the grip side, so it is convenient for beginners to learn to hit and more durable than wood.
- a bat is recommended.
- the grip of the bat in baseball is an important grip that guides the correct bat swing.
- the right hand is held so that the second joint of the finger of the right hand is between the second joint of the finger of the left hand and the base of the finger.
- This is the most orthodox way of gripping, and the back of both hands is the correct way of gripping.
- a swing that matches the line from the shoulder of the bottom hand to the arm and the bat to the swing plane toward the ball, that is, three perpendicular relations between the arms and the bat.
- Non-Patent Document 1 A swing that “creates a bat from the inside” along the bottom hand line is realized (Non-Patent Document 1).
- the bottom area of the grip part of the bat is gripped by the palm grip with the bottom hand, while the second hand of the finger is the first joint of the finger of the bottom hand
- the top hand be gripped with a finger grip so that it is between the two joints and the base of the finger.
- softball hitting is similar to baseball downswing, and it feels that the palm grip can be hit more strongly not only on the bottom hand but also on the palm of at least the middle finger, ring finger, and little finger area of the top hand. Because it is. Therefore, in the “top” of the takeback at the time of batting, in order to match the line from the shoulder of the bottom hand to the arm and the bat with the swing plane toward the ball, the bat grip is between both arms and each arm and the bat.
- the grip portion is made of FRP to facilitate manufacture of the grip portion that easily obtains the maximum angular velocity, while the barrel portion having a hitting center with excellent hitting efficiency is made of metal.
- the grip part and the metal body part of different materials whether to use shock-damping joining of the metal body part and the metal grip part (Patent Document 1) or complete energy transfer rigid body joining (Patent Document) 2) has both advantages and disadvantages.
- the latter is superior for improving the angular velocity of the metal barrel, and secondly, the former with less impact is desirable for swinging the bottom grip as a palm grip.
- the present inventor has used a high strength and high elastic material as a material having intermediate physical properties between the metal barrel and the FRP grip to join the bat with a grip shape. While giving the maximum angular velocity to the swing, it was found that there was no damage, but the impact transmission to the grip part of the barrel for impact was alleviated. It is an object of the present invention to provide a bat structure that is easily connected to the grip portion through a connecting part having elasticity and easily obtains excellent striking efficiency.
- the present invention comprises a barrel portion that forms a hitting center, a cap portion that is attached to the distal end of the barrel portion, a throat portion that extends from the rear end of the trunk portion to the grip portion, and a grip portion that has a grip end at the rear end.
- a three-piece composite bat for connecting the body part and the grip part with a connecting member forming a throat part the body part is made of a hollow metal cylinder having a specific gravity higher than that of the grip part, and caps the opening at the tip
- the center of gravity is located at the lower part of the body part, and the center of gravity at the lower part of the body part is shifted in the distal direction, while the grip part is made of FRP having a lighter specific gravity than the body part to form the function of locking the bottom hand.
- the front end of the grip part is extended and integrated with the throat part, and the vibration attenuation rate is smaller than that of the grip part and larger than that of the body part.
- the hollow body is made of a metal cylindrical body
- the grip part is made of FRP
- the grip part and the grip end are connected to each other.
- the grip end is covered with the grip part to form a function to lock the bottom hand that grips the grip part, and the tip of the grip part is extended and integrated with the throat part.
- the 3PC type is preferable in which the rear end of the body and the front end of the grip part are connected via a vibration damping connection part that is smaller and has a larger vibration attenuation rate than the body metal.
- the connecting part is a resin selected from a para-aramid resin (Kepler), an ultrahigh molecular weight polyethylene resin, a polyarylate resin, a PBO resin, and a high-strength high-elasticity resin made of carbon resin. Therefore, the damping of the FRP grip portion is not abrupt, and a material having physical properties suitable as a slope portion connecting between the body portion and the grip portion is provided.
- the throat portion at the rear end of the body portion engages with the fitting recess at the outer periphery of the lower part of the connection part, and the throat portion at the tip of the grip part is fitted into the upper inner periphery fitting recess of the connection part via the outer fitting protrusion.
- the metal that forms the body is mainly aluminum or aluminum alloy
- the FRP that forms the grip is mainly glass fiber or carbon fiber type FRP. Therefore, the impact attenuation coefficient is that of the metal body, Kepler connection parts, and FRP grips. They are selected in order.
- the composite bat structure made of a metal cylindrical body and FRP is a connecting part made of high-strength and high-elasticity resin, which suppresses extreme tilting and attenuates the impact vibration of the body to grip part. Therefore, not only can the discomfort caused by the off-center hitting be eased, but the center of gravity can be brought closer to the hitting center by adopting the body of the metal cylindrical body, thereby improving the hitting efficiency.
- the grip portion and the grip end can be formed separately, and the grip portion and the grip end can be integrated by connecting them.
- the bottom hand is firmly palm-gripped and at the same time the finger grip is taught to the top hand.
- the palm margin below the joint can be prevented from coming off the grip end. Therefore, a reinforcing portion that engages with the tip of the little finger of the bottom hand and / or the palm near the third joint of the little finger is provided to prevent the bottom hand from coming off from the grip end of the little finger or palm of the bottom hand.
- the bottom grip extending from the end of the grip end part to the grip center has a substantially oval cross section perpendicular to the butt axis, and is located above the grip center of the upper grip and above the bat axis.
- the grip part with at least three fingers from the middle finger to the little finger has an elliptical cross section perpendicular to the bat axis, and the grip end part changes from an elliptical shape to a circular butt throat section, thereby reducing the downswing.
- the bat When this operation is considered mechanically with respect to batting, as shown in FIG. 10, the bat has a body portion B having the thickest uniform diameter from the head H at the tip, and a throat portion where the diameter gradually decreases from the body portion B.
- the bat hit is an elastic collision
- the bat is gripped by the grip part G, swings out, swings at the maximum angular velocity ⁇ , and the moment of inertia I and the angular velocity ⁇ move to the center of gravity G away from the center Q of the grip.
- the kinetic energy F I ⁇ represented by the product of the above is given, and the kinetic energy F given at this maximum angular velocity is hit at a sweet point near the hitting center P of the bat and transmitted to the ball.
- the maximum rebound coefficient is V2 (speed of the bat swung to rebound)-V0 (speed of the ball immediately after hitting) / V1 (throwing of the pitcher) Ball speed) -V2 (speed of bat swung to repel) is obtained, so that the first to third grip structures of the present invention are used and the hitting proposition is based on It is also an object of the present invention to provide a composite bat structure that can easily perform bat swinging with the maximum angular velocity ⁇ that the player can have, and that can be struck at the sweet point of the bat while applying the maximum moment of inertia I to the bat center of gravity C.
- the swing structure “shake the bat to hit the grip” is achieved by using the grip structure “take out the bat from the inside”.
- a right batter needs a grip structure that locks the grip with the left back facing up when swinging.
- the bat swing with the maximum angular velocity gives an inertia moment around the center of gravity, and the product of the inertia moment I and the bat swing angular velocity ⁇ is given to the ball as kinetic energy F,
- the impact energy of the ball is elastically collided with the ball at the sweet spot.
- the sweet spot is a point between the node of the primary mode of the natural vibration of the bat and the hitting center, and a large coefficient of restitution is obtained (FIG. 10).
- the hitting center is the ball hitting the bat. This is a point where the translational motion of the center of gravity of the bat and the rotational motion around the center of gravity cancel each other out, and it means that it does not move.
- the combination of the metal barrel portion and the FRP grip portion further moves the bat center of gravity C in the barrel portion B of the metal bat in the direction of the bat hitting center P from the original position by the additional weight ⁇ M to the butt head cap H.
- the kinetic energy F given to the hit ball at the sweet spot in the vicinity of the hit center can be maximized.
- the lock structure R formed from the grip end E to the grip G locks the gripped back of the hand on the opposite side of the dominant arm, and guides it to hit impact upward, "Swing" to achieve a swing that gives the maximum angular velocity to the bat swing.
- the maximum striking efficiency can be obtained by the synergistic effect of the center of gravity movement and the grip lock.
- the additional weight ⁇ M to the bat head is preferably in the range of 10 to 100 g, although it depends on the total weight of the bat.
- the grip portion of the present invention is preferably made of FRP, and examples thereof include PAN-based fiber FRP, pitch-based fiber FRP, glass fiber-based FRP, aramid fiber-based FRP, and silicon carbide fiber-based FRP.
- the grip part G is preferably formed by combining the grip part GP that gradually reduces the cylindrical diameter from the throat part and the grip end part EP that covers the grip part C to form the grip part C.
- FIG. 16 shows the grip end at the lower end of the FRP grip part GP. Combined with one of parts E-1 and filled with foamed resin, etc.,
- FIG. 17 shows the FRP grip part GP inserted at the lower end of the grip end part E-1 and combined.
- auxiliary grip part G-1 is a semi-cylindrical auxiliary grip part G-1 and upper part of the bottom hand and upper hand gripped by the little finger of the bottom hand and upper hand on the lower end upper surface of the FRP cylindrical grip part GP.
- Inclined part G-2 that opens the forefinger and thumb of the hand is combined with inclined end part E-2 It is constructed by integrally by filling a foaming resin or the like.
- the palm grip of the bottom hand can also be assisted by increasing the coefficient of friction, which preferably surrounds the entire circumference of the lower half of the grip, but at least grips the center of the grip and its vicinity It is good to form from the center to the grip end.
- the length of the part that increases the friction coefficient of the grip part is made to match the rule regarding the length that can be applied with pine sprout as described in the rule book of the US Major League Baseball Committee.
- FIG. 1 is a perspective view of a grip structure of a bat according to the present invention, in which a grip portion G has a substantially oval cross section downward from the center of the grip, and a band or the like is wound around a peripheral surface where a palm of a bottom band comes into contact, and a friction coefficient is large.
- the shape is such that the grip end is inclined and both side surfaces bulge outward from the upper portion to prevent the tip of the outer little finger and the palm below the third finger joint from falling out of the grip end.
- It is a perspective view which shows the holding state of the grip part of FIG. 1, The bottom hand is locked, The palm inner surface has shown the state by which a palm grip is maintained by both surfaces with a large friction coefficient.
- FIG. 4 is a continuous explanatory view showing that the bat is pulled out without changing the distance between the bat and the shoulder and the right angle relationship between the bottom hand and the bat from the state of FIG. 3.
- the grip end shows the state where the tip side of the little finger bulges outside.
- the grip end shows the state where the little finger tip side and the palm end side under the little finger third joint bulge outside.
- the grip end is bulged to the outside of the tip of the little finger and the palm tip side below the third joint of the little finger, and the grip section cross-sectional shape reaches the lower third quarter.
- a lock mechanism is formed at the grip end.
- the lower three-quarters of the AA, BB, and CC line grips form an elliptical cross section, forming a grip for the palm grip, and from there to the slope, a vertically long ellipse is circular (DD line) ) To make a deformable sleeve.
- FIG. 6 is a perspective view of only the grip according to the third modified example of the present invention, in which the grip end is inclined at 20, 25, and 30 degrees with respect to a vertical plane perpendicular to the butt axis from the lower end portion of the grip end; The left and right ends indicate a state in which the grip end is slightly bulged from the outer periphery of the grip portion.
- FIG. 12 is a cross-sectional view along the longitudinal axis of FIG. 11.
- the perspective view which shows the holding state of the grip part of FIG. FIG. 13B is a sectional view taken along line BB in FIG. 13A.
- the body angle and the state of the left hand grip at the time of impact of the inner angle (1), middle (2), and outer angle (3) of the right batter by the grip of FIG. 13A are shown.
- FIG. 4 is an explanatory diagram showing the movement of the center of gravity by the additional weight of the bat head and the movement of the hitting center P from P to G1 by the movement of the grip center from G to G1 in the present invention.
- the perspective view (A) which shows the state which joined the metal cylinder body B and the FRP grip part G via the vibration attenuation type joining part J which consists of highly elastic high-strength resin, An enlarged perspective view (B) of the joining part J FIG.
- FIG. 15C is a cross-sectional view (C) of a joint portion between the cylindrical body body B and the FRP grip portion G and a partially enlarged cross-sectional view (D) of FIG. 15C.
- Sectional drawing (A) which shows the structure of the grip part G of 1st Example which has the lock part R which locks a bottom hand
- the perspective view (A) which shows the structure of the grip part G of 2nd Example which has a lock part which locks a bottom hand
- the side view (B) of the grip part G of 2nd Example which has the lock part F which locks a bottom hand
- Sectional view (A) showing the configuration of the grip part G of the third embodiment for palm-griping from the little finger to the middle finger of the bottom hand and the upper hand, and the grip part and the bottom for locking the bottom hand.
- FIG. 1 is a side view of the entire bat, which includes a butt head H, a butt body B, a butt throat part T, a butt grip part G, and a grip end E.
- the entire bat has a body B made of a cylindrical metal body, a grip part G having an oval or oval non-circular cross section, and a grip end having an oval shape in which both sides bulge outwardly above the oval cross section.
- the body part B and the grip part G are connected by the joint part J.
- FIG. 2 is a sectional view taken along the line II-II.
- the trunk portion is made of a metal cylinder and the grip portion is manufactured by weight reduction with FRP
- a predetermined weight ⁇ M is added
- the bat center of gravity C in the bat trunk portion B is the original weight as shown in FIG. Since it moves by ⁇ a in the direction of the bat hitting center P from the position, the kinetic energy F applied to the center of gravity increases.
- the body part B reaches the grip part G through the joint part J forming the throat part T, and has a non-circular cross section, for example, an elliptical shape, extending toward the grip end E.
- An inclination angle ⁇ is formed in the outer grip portion, and the lock portion R having a non-circular cross section tilts the left hand grip (bottom hand) of the right batter from the little finger side to the thumb side. Is pushed clockwise to lock, maintaining the right-angle relationship between the forearm of the bottom hand and the bat, suppressing the return of the left back during bat swing and suppressing the bending of the left elbow during impact.
- the grip half-circumference part encircled by the palm of the top hand is wrapped with the palm of the top hand, while the grip half-circumference part is one of the first cross-sectional ellipses that is perpendicular to the axis extending in the longitudinal direction of the bat.
- the grip friction coefficient is increased at the half circumference of the grip that is wrapped with the palm of the bottom hand ( Figure 1).
- the friction coefficient of that region is set so that the second joint of the finger of the top hand comes between the second joint of the finger of the bottom hand and the base of the finger.
- the butt grip portion is gripped by the finger grip with the top hand (see FIG. 2), and the back of the bottom hand and the top of the top hand are guided in parallel.
- This is the “top” of the takeback when batting, so that the right angle relationship between the forearm of the second bottom hand and the forearm of the top hand matches the swing plane from the shoulder to the arm and the bat to the swing plane toward the ball.
- Creates three right-angle relationships between both arms and between each arm and the bat, and the three right-angle relationships provide a swing out the bat from within along the bottom hand line. Is.
- the three right angles are a right angle between the forearm of the bottom hand and the bat (FIG. 3A), and a second right angle between the forearm of the bottom hand and the forearm of the top hand (see FIG. 3A), the third is the right angle between the forearm of the top hand and the bat (FIG. 3B).
- the fact that the angle between the forearm of the bottom hand and the bat at the time of the top is almost a right angle has a very important meaning in the swing.
- the bat is placed on the shoulder of the top hand.
- the right angle between the forearm of the bottom hand and the forearm of the top hand dominates the movement of both arms linked to the rotation of the upper body in the batting movement. Both arms do not move with the arms, but the movement of the scapula It moves by rotating the upper body. Therefore, if the forearms move from side to side at right angles from start to finish, the upper body moves when the swing starts to pull out the bat along the bottom hand line with the rotational movement without changing the close distance from the acetabulum to the acetabulum. (FIGS. 4B and C), creating a “pick bat from within” action.
- the right angle between the forearm of the bottom hand and the forearm of the top hand is a palm grip on the bottom hand
- the second joint of the finger of the top hand is between the second joint of the bottom hand and the base of the finger. If you grip the butt grip part with the finger grip on the top hand like a top hand, the back of the hand of the bottom hand and the back of the top hand will be parallel, and the line from the shoulder of the bottom hand to the arm and the bat will match the swing plane going to the ball This will create an action to “take out the bat from inside”.
- the grip structure of the bat may be adopted as the grip structure of the bat.
- the little finger side and little finger of the bottom hand can be firmly gripped with the power grip without falling off from the grip end, and the forearm of the bottom hand is maintained at right angles to the axis of the bat.
- FIG. 6 is an improvement of the modified example shown in FIG. 5, and aims to prevent the power grip of the bottom hand from slipping out or coming off from the palm side grip end and to maintain the power grip of the bottom hand firmly.
- the second modified example not only the upper part in the vicinity of the grip end, but also the curved part along the palm end is bulged on the periphery of the middle abdomen to form the inclined part, so that the palm end of the bottom hand is difficult to come off from the grip end.
- it prevents slipping out of the grip end on the little finger side, and further improves the grip power.
- FIG. 6 shows this grip structure.
- FIG. 6A is an end view of the grip end, and a lock structure portion is formed by tilting the grip from the end to the grip from the upper periphery of the bottom hand side half periphery to the middle abdomen.
- the state is shown in the side view of FIG. 6B and the cross-sectional view taken along the line BB of FIG. That is, from the sectional view taken along line AA in FIG. 6C and the following sectional view taken along line BB, as shown in the bottom hand side half circumference (the right half circumference of the sectional view),
- the wrist is slightly cocked clockwise to lock, and the second slope is formed from the upper edge to the middle abdomen from the end toward the grip, and the back of the hand of the bottom hand extends from the little finger side to the thumb side.
- the palm side of the bottom hand can be firmly gripped with the power grip without falling off from the grip end, and the forearm of the bottom hand is maintained at a right angle to the axis of the bat.
- the bottom grip is gripped with the palm grip so that the angle between the forearm of the bottom hand and the bat at the top is almost perpendicular.
- This is the first necessary task
- second the top hand between the second joint of the finger and the base of the finger against the palm grip of the bottom hand so that the forearm of the bottom hand and the forearm of the top hand are at right angles
- the present invention provides an FRP grip structure that easily realizes such an atypical grip.
- the first is an area that increases the coefficient of friction that realizes the palm grip of the bottom grip
- the second is a bottom grip and a bat. It is a grip structure that can be locked and held in a right angle relationship.
- the grip structure shown in FIG. 7 to FIG. 9 is a bat grip in which at least the bottom grip extending from the grip end to the grip center is substantially elliptical in cross section perpendicular to the bat axis, and from the grip center of the top grip to above the bat. At least the grip part of the three fingers from the middle finger to the little finger has a non-circular cross section perpendicular to the bat axis, and the region transitioning from the elliptical cross section to the circular cross section of the throat portion is an inclined region
- This is a butt grip structure that allows palm grip to be performed on both the bottom hand and the top hand. By gripping the bottom hand and the top hand with the palm grip, it is easy to realize downswing, and a grip suitable for a female softball can be realized.
- the lock structure in this embodiment forms a lock structure by bending the upper end of the grip end along the finger pad so that the left and right ends from the upper end of the grip end and the tip of the little finger of the bottom hand are applied to the grip end.
- the little finger tip side of the end is slightly bulged, or the little finger tip side of the grip end and the palm peripheral end below the little finger are slightly bulged so that the little finger tip of the bottom hand and the palm tip below the little finger are on the grip end.
- the grip end has a multi-faceted shape and both sides bulge, and each corner is curved inwardly from the grip end and tilts, with the little finger tip side and palm end side gripping around the second joint of the bottom hand Reinforced so as not to come off the end.
- the lower end of the grip end flows along the outer shape of the bat and does not need to bulge, but the end grip has an angle of 20 degrees, 25 degrees, and 30 degrees with respect to the vertical line to lock the grip. Strength can be improved.
- an area for increasing the friction coefficient of the grip is formed at least in the central part and the vicinity of the half circumference of the bottom grip part wrapped by the palm of the bottom hand, and the grip lower area (bottom) is formed by the palm grip on the bottom hand. Make it easier to grasp.
- the top hand has an area that increases the friction coefficient of the grip at least in the middle of the upper grip half circumference that is wrapped with the palm of the middle finger, ring finger, and little finger. Make the area (bottom) easier to grip.
- FIG. 11 is a side view of the entire bat, which includes a butt head H, a butt trunk B, a butt throat T, a butt grip G, and a grip end E.
- the bat head H is provided with a cap-type head M having approximately 10 kinds of adjustment weights, in which the additional weight varies in the range of 10 to 100 g, to the standard weight head.
- the end face of the bat head is circular, but the grip has an elliptical cross section, and the grip end has a multi-faceted shape that bulges from the top to both sides.
- a predetermined weight ⁇ M is added to the butt head H.
- the center of gravity C of the bat in the butt body B moves from the original position in the direction of the bat hitting center P by ⁇ a (see FIG. 14).
- the hit center P hardly moves, the sweet spot located near the hit center from the center of gravity C hardly moves. Therefore, the kinetic energy F imparted to the center of gravity C increases by the distance ⁇ a from the center Q of the grip by the amount of the center of gravity movement I (moment of inertia), so even if the angular velocity ⁇ does not change, the kinetic energy is ⁇ a ⁇ ⁇ . Will increase.
- the centroid C approaching the hitting center P the kinetic energy acting on the centroid C is more likely to be affected by the sweet spot, and it is mechanically proved that the kinetic energy imparted to the ball at the sweet spot surely increases.
- the body part B reaches the grip part G through the throat part T, has an elliptical cross section extending toward the grip end E, and an inclination angle ⁇ is formed on the outer grip surface with respect to the central axis extending in the longitudinal direction.
- Part R tilts the left hand grip of the right batter from the little finger side to the thumb side as shown in FIG. 13A.
- the left hand wrist is pressed and locked clockwise, and the return of the left back during bat swing is suppressed. Suppresses bending of left hand elbow during impact. This induces the action of “shaking the bat so as to hit the grip” and brings about a result of improving the angular velocity of the bat swing.
- the inclination angle ⁇ with respect to the center line of the lock portion R is preferably increased by ⁇ according to the increased weight ⁇ M of the butt head. This is because the more the center of gravity moves to the tip of the bat, the more the inertial force that makes the left back of the bat swing easier to return. *
- the grip part of the bat is gradually deformed from an elliptical shape to a circular shape from the grip end toward the grip center, and when the grip end is elliptical, the upper peripheral edge forms an inclined part, Since the grip end is flat from the upper peripheral edge to the lower part, the little finger side of the bottom hand is slippery because the end is not raised. Therefore, in the preferred embodiment 2, it is preferable to employ various grip structures shown in the preferred embodiment 1.
- the joint portion J is formed by using the joint part JP made of a highly elastic high-strength resin (Kepler) for the body portion B made of a metal cylinder and the grip portion G made of FRP.
- FIG. 15 shows the joining method. Metal barrel B is blanked and spun into a bat shape to some extent. Thereafter, shedding is performed. In other words, the base tube is put into the mold and smashed to complete the shape of the bat. Then, it head-processes and heat-processes and provides hardness and stickiness. The joining part JP is inserted therein, and the end of the metal body part B is joined to the recess of the joining part JP via an adhesive.
- Kepler highly elastic high-strength resin
- the grip part GP is inserted into the metal body B from above, and the annular ridge formed on the outer periphery of the upper end of the grip part GP is fitted into the annular groove formed on the inner periphery of the upper part of the joining part JP (FIG. 15D). Secure with adhesive.
- the grip part G has a palm grip of the bottom hand, and the metal body part B is given impact energy through a joining part JP made of high-elasticity and high-strength resin (Kepler). Does not occur.
- the maximum energy transmission point of the bat is closer to the grip side than that of the wooden case due to the weight balance between the metal barrel and the FRP grip portion G, and further extends toward the hand. Furthermore, as a result of the center of gravity approaching the hitting center, the hitting energy increases. As a result, the kinetic energy F at the sweet spot in the bat swing is improved and the swing is corrected so as to give the maximum angular velocity to the bat swing, so that the maximum impact efficiency can be achieved by the synergistic effect.
- the grip portion of the present invention is preferably manufactured from FRP, and examples thereof include PAN-based fiber FRP, pitch-based fiber FRP, glass fiber-based FRP, aramid fiber-based FRP, and silicon carbide fiber-based FRP.
- the grip part G needs to form a lock part that inclines from the grip end toward the center of the grip part at least because the bottom hand needs to perform a palm grip, and covers the grip part GP that gradually reduces the cylindrical diameter from the throat part. It is preferable to form the grip portion G in combination with the grip end part EP.
- FIG. 16 shows the FRP grip part GP, which is assembled by bringing the lower end of the grip end part E-1 close to one end of the grip end part E-1 and filled with foamed resin or the like.
- FIG. 16A has a lock portion R for locking the bottom hand.
- FIG. 16B is a sectional view showing the configuration of the grip portion G of the first embodiment, FIG. 16B is a side view of the grip portion G of the first embodiment having a lock portion R for locking the bottom hand, and FIG. 16C is a lock for locking the bottom hand.
- the top view of the grip part G of 2nd Example which has the part R is shown.
- FIG. 17 shows an FRP grip part GP with the lower end inserted into the center of the grip end part E-1, combined with foam resin, etc.
- FIG. 17A shows a first part having a lock portion F for locking the bottom hand.
- FIG. 17B is a side view of the grip portion G of the third embodiment having a lock portion R for locking the bottom hand
- FIG. 17C is a lock for locking the bottom hand. It is a top view of the grip part G of 3rd Example which has the part F.
- FIG. 17 shows an FRP grip part GP with the lower end inserted into the center of the grip end part E-1, combined with foam resin, etc.
- FIG. 17A shows a first part having a lock portion F for locking the bottom hand.
- FIG. 17B is a side view of the grip portion G of the third embodiment having a lock portion R for locking the bottom hand
- FIG. 17C is a lock for locking the bottom hand. It is a top view of the grip part G of 3rd Example which has the part
- FIG. 18 shows the semi-cylindrical auxiliary grip part G-1 of the two-stage grip part that is gripped by the middle finger from the lower finger of the bottom hand and the upper hand on the upper surface of the lower end of the FRP system cylindrical grip part GP, and the index finger and thumb of the upper hand are opened.
- the inclined part G-2 can be combined with the inclined end part E, filled with foamed resin or the like, and integrated. That is, FIG. 18A is a cross-sectional view showing the configuration of the grip portion G of the fourth embodiment that palm-grips from the little finger to the middle finger of the bottom hand and the upper hand and locks the bottom hand, and FIG. FIG.
- FIG. 18C is a plan view of the grip end E of the fourth embodiment of the second-stage grip for palm gripping from the little finger to the middle finger of the bottom hand and the upper hand, and FIG. Figure 3 shows various tilts (20, 25, 30 °) relative to a line perpendicular to the axis of the grip end of the three examples.
- a grip having various lock functions can be easily manufactured by forming the grip portion and the grip end part.
Abstract
Description
他方、野球におけるバットのグリップは正しいバットスウィングを誘導する大切な握りである。通常、右打ちの選手の場合は右手の指の第二関節が左手の指の第二関節と指の付け根の間にくるように握る。これが最もオーソドックスな握り方で、両手の甲は平行になる正しい握り方である。この握りによって、テイクバックの「トップ」において、ボトムハンドの肩から腕、バットにかけてのラインを球に向かうスウィングプレーンに一致させるスウィング、すなわち、両腕とバットとの間に3つの直角の関係を作り出し、ボトムハンドのラインに沿って、「内からバットを出す」スウィングが実現するものである(非特許文献1)。このようなバットの握りに強さとコントロール性能の両方を持たせるにはバットのグリップ部下部領域をボトムハンドでパームグリップに握らせる一方、トップハンドを指の第二関節がボトムハンドの指の第二関節と指の付け根の間にくるようにしてトップハンドにフィンガーグリップで握らせることが推奨される。他方、ダウンスウィングを教えるためにはボトムハンドにパームグリップさせるだけでなく、トップハンドにも好ましくは中指、薬指及び小指の領域の手のひらにもパームグリップさせる必要がある。特にソフトボールの打撃は野球のダウンスウィングに似て、ボトムハンドだけでなく、トップハンドの少なくとも中指、薬指及び小指の領域の手のひらにパームグリップさせる方が強くヒッティングすることができるという感触が得られるからである。そこで、バッティング時テイクバックの「トップ」において、ボトムハンドの肩から腕、バットにかけてのラインを球に向かうスウィングプレーンに一致させるために、バットグリップは、両腕の間、各両腕とバットとの間に3つの直角の関係を作り、その3つの直角の関係によってボトムハンドのラインに沿って、「内からバットを出す」スウィングを実現するために、第1に、ボトムハンドにパームグリップで握らせ、ボトムハンドの前腕とバット軸線とを直角関係に維持するグリップ構造を提供する必要があるが、このグリップ構造を容易に実施するためには、バットグリップにおいて、少なくともグリップエンドからグリップ中心に至るボトムグリップがバット軸線に対し直交する断面が大略楕円形をなすとともに、該楕円形グリップ部をボトムハンドでパームグリップに把持したときボトムハンドを手首部を中心に親指側に押圧旋回するロック構造をグリップエンドをバットグリップの軸線に対して傾斜させて製造し、しかもそのロック機能を維持するために、ボトムグリップの小指先端及び/又は小指第三関節下方の掌端がグリップエンドから外れないようにグリップエンドが少なくとも一方の側面が外方に、好ましくは両側面が外方に膨出した、お多福形状とするグリップ構造が提案される。
本発明においては、衝撃減衰形態であるが、接続パーツをパラ系アラミド樹脂(ケプラー)、超高分子量ポリエチレン樹脂、ポリアリレート樹脂、PBO樹脂、及び炭素樹脂からなる高強度高弾性樹脂から選ばれる樹脂から選択するので、FRP製グリップ部に対する減衰は急激でなく、胴部とグリップ部の間を接続するスロープ部として適した物性を有するものが提供される。そして、前記胴部後端のスロート部は接続パーツ下部外周の嵌合凹部に係合し、グリップ部先端のスロート部は接続パーツの上部内周嵌合凹部に外側嵌合凸部を介して嵌合し、接続するのが好ましい。胴部を形成する金属は主として、アルミ又はアルミ合金で、グリップ部を形成するFRPは主としてガラス繊維またはカーボン繊維形のFRPであるので、衝撃減衰係数は金属胴部、ケプラー接続パーツ、FRPグリップの順となるように選択される。
以下、添付図面に基づいて説明する。
図1はバット全体の側面図で、バットヘッドHと、バット胴部Bと、バットスロート部Tと、バットグリップ部Gと、グリップエンドEとからなる。
バット全体は金属円筒体からなる胴部Bと、楕円形又は卵形の非円形断面をなすグリップ部Gと、グリップエンドは楕円形断面の上方、両側が外方に膨出したお多福形状をなし、接合部Jで胴部Bとグリップ部Gとを接続している。図2はそのII-II線断面図である。
図11はバット全体の側面図で、バットヘッドHと、バット胴部Bと、バットスロート部Tと、バットグリップ部Gと、グリップエンドEとからなる。
バットヘッドHには標準重量のヘッドに付加重量が10~100gの範囲で変化するおよそ10種類の調節重しのキャップ型ヘッドMが取り付けられる。バットヘッドの端面は円形であるが、グリップは楕円形断面をなし、グリップエンドは上部から両側に膨出するお多福形状をなす。
本発明においては、金属円筒体からなる胴部BとFRPからなるグリップ部Gを高弾性高強度樹脂(ケプラー)からなる接合パーツJPを用いて接合部Jを形成する。図15はその接合方式を示す。金属胴部Bは素管加工し、スピニング加工してある程度バットの形にする。その後、シェジング加工を施す。即ち金型に素管を入れて強打し、バットの形を完成させる。その後、ヘッド加工し、熱処理加工して、硬度と粘りを付与する。そこに、接合パーツJPを嵌入し、金属胴部Bの端部を接合パーツJPの凹部に接着剤を介して接合する。その後、グリップパーツGPを上部から金属胴部Bに挿入し、グリップパーツGPの上端外周に形成した環状突条を接合パーツJPの上端内周に形成した環状凹溝に嵌入させ(図15D)、接着剤で固定する。これに胴部の打撃時の衝撃は接合パーツJPを介してやや減衰してグリップ部Gに伝達されるので、オフセンター打撃のときでもスティング(衝撃)は緩和されることになる。他方、グリップ部Gはボトムハンドのパームグリップが確保され、高弾性高強度樹脂(ケプラー)からなる接合パーツJPを介して金属胴部Bは打撃エネルギーが付与されるので、ねじれによるエネルギー減少はほとんど発生しない。しかも金属胴部とFRPグリップ部Gとの重量バランスによりバットの最大エネルギー伝達点は木製の場合よりグリップ側に近く、しかも手元の方に長く伸びることになる。さらに重心は打撃中心に近づく結果、打撃エネルギーは増加することになる。その結果、バットスウィングでのスイートスポットでの運動エネルギーFを向上させるとともに、バットスウイングに最大の角速度を与えるようにスウィングを矯正するので、その相乗効果により最大の打撃効率を達成できることになる。
本発明のグリップ部はFRPで製造されるのが好ましく、PAN系繊維FRP,ピッチ系繊維FRP,ガラス繊維系FRP,アラミド繊維系FRP,炭化ケイ素繊維系FRPなどが挙げられる。グリップ部Gは少なくともボトムハンドにパームグリップを行わせる必要上グリップエンドからグリップ部中心に向けて傾斜するロック部を形成する必要があり、スロート部から次第に円筒径を縮小するグリップパーツGPとそれに被せるグリップエンドパーツEPとを組み合わせてグリップ部Gを形成するのが好ましい。図16はFRP系グリップパーツGPの下端をグリップエンドパーツE-1の一方に寄せて組み合わせ、発泡樹脂等を充填して一体化したもので、図16Aはボトムハンドをロックするロック部Rを有する第1実施例のグリップ部Gの構成を示す断面図で、図16Bはボトムハンドをロックするロック部Rを有する第1実施例のグリップ部Gの側面図、図16Cはボトムハンドをロックするロック部Rを有する第2実施例のグリップ部Gの平面図を示す。
G グリップ部
J 接合部
Claims (10)
- 打撃中心を形成する胴部と、胴部先端に取り付けられるキャップ部と、胴部後端からグリップ部に至るスロート部と、後端にグリップエンドを有するグリップ部と、からなり、前記胴部とグリップ部をスロート部を形成する接続部材で接続する3ピース複合型バットであって;
上記胴部は、グリップ部より比重の高い中空の金属円筒体からなり、その先端開口をキャップ部で閉鎖する一方、グリップ部を胴部より比重の軽いFRP製とし、上記胴部下部にある重心を先端方向に移行させる一方、グリップ部にボトムハンドをロックする機能を形成するとともに、上記接続部材をグリップ部先端は延長してスロート部と一体化させ、グリップ部より振動減衰率が小さく、胴部より振動減衰率が大きい振動減衰接続パーツとし、胴部後端とグリップ部の先端とを接続させることを特徴とする複合型バット構造。 - 打撃中心を形成する金属胴部がアルミ又はアルミ合金からなり、胴部後端からグリップ部に至るスロート部がパラ系アラミド樹脂(ケプラー)、超高分子量ポリエチレン樹脂、ポリアリレート樹脂、PBO樹脂、及び炭素樹脂からなる高強度高弾性樹脂から選ばれる樹脂からなり、FRP製グリップ部がPAN系繊維FRP,ピッチ系繊維FRP,ガラス繊維系FRP,アラミド繊維系FRP,炭化ケイ素繊維系FRPからなる群から選ばれるFRPからなる請求項1記載の複合型バット構造。
- 前記胴部後端のスロート部は接続パーツ下部外周の嵌合凹部に係合し、グリップ部先端のスロート部は接続パーツの上部内周嵌合凹部に外側嵌合凸部を介して嵌合し、接続している請求項2記載の複合型バット構造。
- FRP製グリップ部において、グリップエンドパーツが少なくともグリップエンドからグリップ中心に至るバット軸線に対し直交する断面が楕円形をなすとともに、該非円形グリップエンドをボトムハンドでパームグリップで把持したときボトムハンドを手首部を中心に親指側に押圧するロック構造をグリップエンドに有する請求項1~3のいずれかに記載の複合型バット構造。
- 上記グリップエンドパーツのボトムハンドの小指先端部及び/又は小指第三関節近傍の掌部と係り合う補強部を備え、スウィング時のボトムハンドの小指又は掌部のグリップエンドからの外れを防止する請求項4記載の複合型バット構造。
- グリップエンドパーツのボトムハンドに対するロック構造が、バットの長手方向軸に対しグリップエンドとグリップ部との境界に、ボトムハンドの手の甲がグリップ中心に向かう押圧強制力を与えるロック構造を形成し、前記ロック構造のボトムハンドの小指先端部及び/又は小指第三関節近傍の掌部と係合補強部がグリップエンド外方膨出部で形成されていることを特徴とする請求項4記載の複合型バット構造。
- グリップエンドパーツのエンドからグリップ中心に至るボトムグリップがバット軸線に対し直交する断面が大略楕円形をなすとともに、アッパーグリップのグリップ中心からバット上方に少なくとも中指から小指に至る3本指でのグリップ部分をバット軸線に対し直交する断面が大略楕円形をなし、該グリップ部楕円形断面からバットスロート部断面円形に変化する請求項4記載の複合型バット構造。
- グリップエンドパーツのボトムハンドの手のひらで包み込まれるボトムグリップ部の半周部の少なくとも中央部およびその近傍にグリップの摩擦係数を増大させる領域部を形成し、ボトムハンドにパームグリップでグリップ下方領域(ボトム)を握らせる請求項4記載の複合型バット構造。
- トップハンドの少なくとも中指、薬指及び小指に相当する手のひらで包み込まれるアッパーグリップ部の半周部の少なくとも中央部およびその近傍にグリップの摩擦係数を増大させる領域部を形成し、トップハンドにもパームグリップでグリップ上方領域を握らせる請求項4記載の複合型バット構造。
- グリップ中心からスロート部に至るグリップ部の上部領域において、上記ボトムハンドの指の第二関節と指の付け根の間にトップハンドの指の第二関節がくるようにトップハンドでバットグリップ部を握った時トップハンドの第2関節を中心としてその近傍にグリップの摩擦係数を増大させる領域部を形成し、ボトムハンドにパームグリップでグリップ下部を握らせるとともに、トップハンドにフィンガーグリップでグリップ上部を握らせるように、ボトムハンドの前腕とトップハンドの前腕との直角関係を誘導する請求項4記載の複合型バット構造。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/507,490 US20170296891A1 (en) | 2014-09-02 | 2015-09-02 | Composite bat structure |
JP2016546670A JP6632981B2 (ja) | 2014-09-02 | 2015-09-02 | 複合型バット構造 |
Applications Claiming Priority (10)
Application Number | Priority Date | Filing Date | Title |
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JP2014178533 | 2014-09-02 | ||
JP2014004679U JP3195294U (ja) | 2014-09-02 | 2014-09-02 | バットグリップ構造 |
JP2014-004679U | 2014-09-02 | ||
JP2014178534 | 2014-09-02 | ||
JP2014-004678U | 2014-09-02 | ||
JP2014-178534 | 2014-09-02 | ||
JP2014-178533 | 2014-09-02 | ||
JP2014004678U JP3194502U (ja) | 2014-09-02 | 2014-09-02 | 打撃効率を高めるバット構造 |
JPPCT/JP2015/064279 | 2015-05-19 | ||
PCT/JP2015/064279 WO2016035391A1 (ja) | 2014-09-02 | 2015-05-19 | バットグリップ構造およびそれを備えるバット構造 |
Publications (1)
Publication Number | Publication Date |
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WO2016035815A1 true WO2016035815A1 (ja) | 2016-03-10 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/074827 WO2016035782A1 (ja) | 2014-09-02 | 2015-09-01 | バットグリップ構造およびそれを備えるバット構造 |
PCT/JP2015/074936 WO2016035815A1 (ja) | 2014-09-02 | 2015-09-02 | 複合型バット構造 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2015/074827 WO2016035782A1 (ja) | 2014-09-02 | 2015-09-01 | バットグリップ構造およびそれを備えるバット構造 |
Country Status (2)
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US (2) | US20170282031A1 (ja) |
WO (2) | WO2016035782A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019083874A (ja) * | 2017-11-02 | 2019-06-06 | 株式会社アシックス | バット及びバットの設計方法 |
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US5088733A (en) * | 1988-04-01 | 1992-02-18 | Barnea Jeffrey M | Baseball bat with oval handle |
JP2003299756A (ja) * | 2002-04-02 | 2003-10-21 | Wilson Sporting Goods Co | ボールバット |
US20070191156A1 (en) * | 2006-02-15 | 2007-08-16 | Thu Van Nguyen | A multi-component bat having threaded connection and assembly process |
JP2008508053A (ja) * | 2004-07-29 | 2008-03-21 | イーストン・スポーツ・インコーポレイテッド | 最適化されたボールバット |
US20090131206A1 (en) * | 2007-11-15 | 2009-05-21 | Leinert Bruce R | Baseball bat |
JP2011139856A (ja) * | 2010-01-08 | 2011-07-21 | Nhk Spring Co Ltd | 打撃具及び球技用バット |
JP2014117480A (ja) * | 2012-12-17 | 2014-06-30 | Ssk Co Ltd | 非木製バットとその製造方法 |
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2015
- 2015-09-01 US US15/507,469 patent/US20170282031A1/en not_active Abandoned
- 2015-09-01 WO PCT/JP2015/074827 patent/WO2016035782A1/ja active Application Filing
- 2015-09-02 US US15/507,490 patent/US20170296891A1/en not_active Abandoned
- 2015-09-02 WO PCT/JP2015/074936 patent/WO2016035815A1/ja active Application Filing
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US5088733A (en) * | 1988-04-01 | 1992-02-18 | Barnea Jeffrey M | Baseball bat with oval handle |
JP2003299756A (ja) * | 2002-04-02 | 2003-10-21 | Wilson Sporting Goods Co | ボールバット |
JP2008508053A (ja) * | 2004-07-29 | 2008-03-21 | イーストン・スポーツ・インコーポレイテッド | 最適化されたボールバット |
US20070191156A1 (en) * | 2006-02-15 | 2007-08-16 | Thu Van Nguyen | A multi-component bat having threaded connection and assembly process |
US20090131206A1 (en) * | 2007-11-15 | 2009-05-21 | Leinert Bruce R | Baseball bat |
JP2011139856A (ja) * | 2010-01-08 | 2011-07-21 | Nhk Spring Co Ltd | 打撃具及び球技用バット |
JP2014117480A (ja) * | 2012-12-17 | 2014-06-30 | Ssk Co Ltd | 非木製バットとその製造方法 |
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JP2019083874A (ja) * | 2017-11-02 | 2019-06-06 | 株式会社アシックス | バット及びバットの設計方法 |
Also Published As
Publication number | Publication date |
---|---|
WO2016035782A1 (ja) | 2016-03-10 |
US20170282031A1 (en) | 2017-10-05 |
US20170296891A1 (en) | 2017-10-19 |
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