JP6180279B2 - Ball for rods - Google Patents

Description

  The present invention relates to a ball game rod-shaped body, and more particularly to a ball game for hitting a ball such as golf or baseball or a ball game rod that can be used for practice.

  In ball games in which a ball is hit with a rod-like body such as a club or bat, such as golf or baseball, one of the problems is to make the ball strong and fly far. Since it is effective to use the bending of the rod-shaped body for such a problem, the structure of the rod-shaped body for improving the bending has been studied conventionally. For example, Patent Document 1 discloses a golf club shaft that improves the bending of the shaft by changing the bending rigidity along the longitudinal direction of the shaft and providing a plurality of bending rigidity lowering regions.

JP 2005-152613 A

  However, the shaft disclosed in Patent Document 1 is not only difficult for the user to imagine an efficient swing because the bending of the shaft itself occurs in any direction at each position in the axial direction. Even if there is variation, it is difficult to experience the difference between them, so it is difficult to efficiently use the bending of the shaft.

  Accordingly, an object of the present invention is to provide a ball-like rod-shaped body that can easily perform a swing that effectively uses the bending of the rod-shaped body.

  The object of the present invention is a ball-like rod-shaped body that can be used for ball games or for practice thereof, and is provided with a gripping portion on the base end side of the elongated body, A first high-rigidity portion and a second high-rigidity portion that are connected to each other via a portion, and each of the first high-rigidity portion and the second high-rigidity portion has a flat cross-sectional shape, The flat portions are arranged so that the longitudinal directions of the flat shapes intersect with each other, and the intermediate portion is achieved by a ball-like rod-like body having lower rigidity than the first high-rigidity portion and the second high-rigidity portion. The

  In this ball game rod-like body, it is preferable that the main body has a ball hitting portion at the tip.

  It is preferable that the hitting unit includes a gravity center position adjusting means for adjusting the gravity center position.

  Moreover, it is preferable to provide a moving body that moves relative to the striking part by acceleration / deceleration of the striking part.

  In addition, the gripping portion includes a third high-rigidity portion, a first low-rigidity portion, a fourth high-rigidity portion, and a second low-rigidity portion that are sequentially arranged from the proximal end side toward the distal-end side. It is preferable that the first low-rigidity portion and the second low-rigidity portion have lower rigidity than the third high-rigidity portion and the fourth high-rigidity portion.

  ADVANTAGE OF THE INVENTION According to this invention, the rod-shaped body for ball games which can perform the swing which uses effectively the bending of a rod-shaped body easily can be provided.

It is a front view of the rod-shaped object for ball games concerning one embodiment of the present invention. 2A is a cross-sectional view taken along the line AA and FIG. 2B is a cross-sectional view taken along the line BB in the ball-shaped rod for ball game shown in FIG. 1. It is a principal part perspective view of the rod-shaped body for ball games which concerns on other embodiment of this invention. It is a principal part perspective view of the rod-like body for ball games which concerns on other embodiment of this invention. It is a figure for demonstrating the usage method of the rod-shaped object for ball games shown in FIG. It is a front view of the rod-shaped object for ball games concerning other embodiments of the present invention. It is a principal part enlarged view of the rod-shaped body for ball games which concerns on other embodiment of this invention. It is a principal part enlarged view of the rod-shaped body for ball games which concerns on other embodiment of this invention. It is a front view of the rod-shaped object for ball games concerning other embodiments of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a ball game rod according to an embodiment of the present invention. A ball game rod 1 shown in FIG. 1 is used as a golf club or golf swing practice tool, and has a long main body 10 and a gripping portion (grip) provided on the base end side of the main body 10. ) 20 and a striking portion (head) 30 provided on the front end side of the main body 10.

  The main body 10 includes a first high-rigidity portion 12 and a second high-rigidity portion 14 having a flat cross-sectional shape, and is disposed on the proximal end side of the first high-rigidity portion 12 along the axis L of the main body 10. A second high-rigidity portion 14 is disposed. The first high-rigidity portion 12 and the second high-rigidity portion 14 are made of, for example, a metal material or a synthetic resin, and have a certain thickness (for example, about 1 cm). In fact, it is configured so that bending in the thickness direction hardly occurs while recalling bending in the thickness direction.

  2A and 2B are a cross-sectional view taken along line AA and BB in FIG. 1, respectively. As shown in FIGS. 2A and 2B, the longitudinal directions D1 and D2 of the flat cross-sectional shapes of the first high-rigidity portion 12 and the second high-rigidity portion 14 are viewed in the axial direction of the main body 10. Sometimes they are arranged to cross each other. Thereby, it can be made easy to remind the user of the image that causes the main body 10 to bend in the two directions that are the thickness directions of the first high-rigidity portion 12 and the second high-rigidity portion 14. . The intersection angle between the first high-rigidity portion 12 and the second high-rigidity portion 14 is not particularly limited, but is preferably orthogonal to each other as in the present embodiment.

  The intermediate portion 19 is interposed between the first high-rigidity portion 12 and the second high-rigidity portion 14, and both end portions are the end portions of the first high-rigidity portion 12 and the second high-rigidity portion 14, respectively. It is fixed by welding. As long as the means for connecting the first high-rigidity part 12 and the second high-rigidity part 14 and the intermediate part 19 can be securely connected to each other, such as bonding, fitting, or fixing using screws or rivets. It is not specifically limited, Furthermore, the structure which can attach or detach both may be sufficient. It is preferable that the first high-rigidity part 12, the intermediate part 19, and the second high-rigidity part 14 are arranged in a straight line with their center lines along the axis L of the main body 10.

  The intermediate portion 19 is configured to have lower rigidity than the first high-rigidity portion 12 and the second high-rigidity portion 14. That is, the bending rigidity in any direction of the intermediate portion 19 is set to be lower than any bending rigidity of the first high-rigidity portion 12 and the second high-rigidity portion 14 in the same direction. Further, the torsional rigidity of the intermediate portion 19 around the axis of the main body 10 is set to be lower than any of the torsional rigidity of the first high-rigidity portion 12 and the second high-rigidity portion 14. The bending rigidity and torsional rigidity of the intermediate portion 19 are preferably set to be approximately the same as the bending rigidity and torsional rigidity of a conventional golf club shaft, for example.

  Specifically, the material of the intermediate portion 19 is the same as the material of the first high-rigidity portion 12 and the second high-rigidity portion 14, and the intermediate portion 19 is replaced with the first high-rigidity portion 12 and the second high-rigidity portion 12. It can be formed in a cylindrical shape whose diameter is smaller than the thickness of the high-rigidity portion 14. Alternatively, the intermediate portion 19 can be made of a material having a Young's modulus smaller than that of the first high-rigidity portion 12 and the second high-rigidity portion 14, whereby the bending rigidity and torsional rigidity of the intermediate portion 19 can be lowered. The intermediate portion 19 can be formed in a tapered shape, for example, to generate an axial stiffness distribution. In this case, it is preferable that the maximum values of the bending rigidity and the torsional rigidity of the intermediate portion 19 are smaller than the minimum values of the bending rigidity and the torsional rigidity of the first high rigidity portion 12 and the second high rigidity portion 14.

  The bending rigidity of the intermediate portion 19 is preferably isotropic, but is not necessarily limited thereto. For example, the intermediate portion 19 is bent in the direction imaged from the shapes of the first high-rigidity portion 12 and the second high-rigidity portion 14 (that is, the thicknesses of the first high-rigidity portion 12 and the second high-rigidity portion 14). It is possible to adopt a configuration in which flexible deformation is likely to occur in the direction). FIG. 3 shows an example of such an intermediate portion 19, in which a plurality of flexible strips 191 are arranged between a pair of end plates 192 and 192, and the first high-rigidity portion 12 and Each band plate 191 may be arranged according to the long side and the short side of the second high-rigidity portion 14. Thereby, the intermediate part 19 can be configured to easily generate not only bending deformation but also torsional deformation. Or as shown in FIG. 4, the intermediate part 19 can be comprised by the cylindrical body 194 which has the some slit 193 in the axial direction of an outer peripheral surface. In addition to the above, the intermediate portion 19 can also be configured from a solid or hollow member made of an elastic material such as rubber, or a spring material such as a coil spring.

  The holding part 20 and the striking part 30 are fixed to both ends of the main body 10 by welding. Regarding the fixing of the gripping portion 20 and the striking portion 30 to the main body 10, as in the case of the connection between the first high-rigidity portion 12 and the second high-rigidity portion 14 and the intermediate portion 19, other known couplings are also possible. Means can be used as appropriate. The orientation of the first high-rigidity portion 12 relative to the striking portion 30 is such that the wide surface of the first high-rigidity portion 12 faces the striking target when the face that is the striking surface of the striking portion 30 is directed to the striking target. Is set to However, when the orientations of the first high-rigidity portion 12 and the second high-rigidity portion 14 are switched and the face of the striking portion 30 is set to the target, the wide surface of the second high-rigidity portion 14 faces the target. You may comprise as follows.

  As shown in FIG. 5, the ball-shaped rod 1 having the above-described configuration is such that the user stands in front of the ball B and takes an address toward the hitting target in the right direction of the drawing, From the state where the face and the wide surface of the first high-rigidity portion 12 are directed to the hitting target, the golf swing can be used. Since the first high-rigidity portion 12 and the second high-rigidity portion 14 are arranged so that the longitudinal directions of the flat cross-sectional shapes intersect each other, the main body 10 is different for the user in the address state. An image in two directions can be visually generated.

  The user performs backswing and downswing according to this image. That is, in the backswing, the user swings up the first high-rigidity portion 12 in the thickness direction and then swings up the second high-rigidity portion 14 in the thickness direction. The high-rigidity part 14 is imaged in a state of being bent in the swing direction. Thereafter, the user swings down the second high-rigidity portion 14 in a bent state in the downswing in the reverse direction, and the inertial force in the downward direction is applied to the hitting portion 30 due to this bending. While imagining the occurrence, the first high-rigidity portion 12 is further swung down with an image that causes the first high-rigidity portion 12 to conform to the thickness direction. Thus, in both the backswing and the downswing, a swing that effectively uses the bending of the main body 10 can be performed by performing a two-step swing that changes the direction in which the main body 10 is bent in the middle. it can.

  As an actual behavior of the ball-shaped rod 1 for ball games, the first high-rigidity portion 12 and the second high-rigidity portion 14 are hardly deformed due to their high rigidity, and the user imagines that This mainly occurs in the intermediate portion 19. That is, the bending of the main body 10 that the user consciously changed the direction during the backswing or the downswing occurs as a bending deformation in two different directions in the intermediate portion 19, and is accompanied by a change in the bending direction. Torsional deformation of the main body 10 also occurs mainly in the intermediate portion 19. In this way, the user performs the swing along the image visually recalled from the shapes of the first high-rigidity portion 12 and the second high-rigidity portion 14, and actually the main body 10 during the swinging. On the other hand, since the bending deformation and the torsional deformation similar to those of the conventional golf club can be caused, the swing that effectively utilizes the bending of the rod-like body can be easily performed. Further, when this ball game rod 1 is used for practice, the user swings a general golf club with the same image as the ball game rod 1 of the present embodiment, thereby promoting progress. be able to.

  When performing a swing using the ball-shaped rod 1 for ball games, it is easy for the user to recall an image in which the first high-rigidity portion 12 and the second high-rigidity portion 14 are each made to be in the thickness direction. A swing sheet displaying the trajectory of each part of the body such as the hand and the waist and the trajectory of each part of the rod-like body 1 such as the hitting part 30 is attached to a wall or the like, and the body or the rod-like body 1 along the displayed trajectory. You may make it move. This swing seat is formed in a cylindrical shape so as to surround the user, and by tilting the axis line according to the forward tilting posture of the user, the user swings so as to follow the displayed trajectory. It is possible to acquire an efficient swing more easily.

  The cross-sectional shape of the first high-rigidity portion 12 and the second high-rigidity portion 14 may be a flat shape so that a virtual bending direction can be easily visualized, and is rectangular as in this embodiment. In addition to the cross section, various shapes such as an elliptical shape, a rhombus shape, a polygonal shape, and a belt shape may be used. Further, the first high-rigidity portion 12 and the second high-rigidity portion can be obtained by externally fitting a member having a flat cross-sectional shape in two places on a cylindrical conventional golf shaft while changing the direction of the longitudinal direction. 14 can also be configured. In this case, the first high-rigidity portion 12 and the second high-rigidity portion are arranged by placing the first high-rigidity portion 12 and the second high-rigidity portion 14 at an interval with respect to the cylindrical shaft. The shaft portion exposed between 14 can function as the intermediate portion 19. Adding a color, a pattern, or the like to the first high-rigidity portion 12 and the second high-rigidity portion 14 as a configuration that visually appeals the bending direction of the first high-rigidity portion 12 and the second high-rigidity portion 14. You can also.

  As mentioned above, although one Embodiment of this invention was explained in full detail, the specific aspect of this invention is not limited to the said embodiment. For example, in the ball game rod 1 shown in FIG. 1, it is preferable that the hitting unit 30 is configured so that the center of gravity position can be adjusted by the center of gravity position adjusting means. The center-of-gravity position adjusting means 40 shown in FIG. 6 includes a bolt part 42 that is fixed to the tip of the main body 10 and extends in the axial direction, and two nuts 44 a and 44 b that are screwed into the bolt part 42. By inserting the cylindrical insertion portion 32 provided in 30 into the bolt portion 42 and sandwiching it with the nuts 44a and 44b, the center of gravity of the striking portion 30 is moved in the axial direction of the main body 10 so that the desired position is reached. Can be fixed. As the center-of-gravity position adjusting means, various adjusting members having different lengths are prepared in advance and appropriately interposed between the main body 10 and the striking part 30, so that the center of gravity position of the striking part 30 is set in the axial direction of the main body 10. The structure which can be adjusted may be sufficient.

  In the center-of-gravity position adjusting means 40 shown in FIG. 6, another bolt part is fixed to the insertion part 32 so as to extend in a direction orthogonal to the axial direction of the bolt part 42, and the striking part 30 is moved along this bolt part. By making it possible, the position of the center of gravity of the striking part 30 may be adjusted not only in the axial direction of the main body 10 but also in a direction perpendicular thereto. Further, the center of gravity of the striking portion 30 can be configured to be movable in three orthogonal directions by the same method as described above. According to these configurations, it is possible to easily experience the bending and twisting change of the intermediate portion 19 due to the difference in the center of gravity of the hitting portion 30, and it is possible to experience club fitting suitable for the user and efficient swinging. Can be made easier. The center-of-gravity position adjusting means 40 can also be configured by a weight body that is detachable or movable with respect to the striking portion 30.

  Further, as shown in FIG. 7, the striking portion 30 is a hollow wood-type head, a part of the striking portion 30 (for example, the upper crown portion 34) is formed of a transparent material, and a sponge ball is formed inside the striking portion 30. It is also possible to provide a movable body 50 such as a ping-pong ball. According to this configuration, the movement of the moving body 50 due to the acceleration / deceleration of the striking portion 30 during the swing can be visually observed through the transparent crown portion 34, and the direction and magnitude of the moment acting on the striking portion 30 can be determined. The user can easily understand. The striking part 30 does not necessarily have to include a transparent part, and the movement of the striking part 30 can also be grasped by the response when the moving body 50 collides with the inner wall surface of the striking part 30 by the acceleration / deceleration of the striking part 30. . A movement path may be formed inside the striking unit 30 so that the moving body 50 can move only when the striking unit 30 moves correctly, and the moving body 50 located at the start point at the start of the swing is at the end of the swing. A swing check can also be performed by confirming whether or not it has moved to the end point. The moving body 50 may be configured to be connected to an elastic member such as a spring so that it can be confirmed that the moving body 50 jumps out from the striking portion 30 during the swing.

  As shown in FIG. 8, the gripping portion 20 includes a third high-rigidity portion 26, a first low-rigidity portion 27, a fourth high-rigidity portion 28, and a second low-rigidity portion from the proximal end side toward the distal end side. The rigid portions 29 can be sequentially arranged. The first low-rigidity portion 27 and the second low-rigidity portion 29 are set so that the bending rigidity is lower than that of the third high-rigidity portion 26 and the fourth high-rigidity portion 28. Flexural rigidity changes discontinuously. When the grip portion 20 is formed of a rubber material or the like as in the conventional grip, a third high-rigidity portion 26 and a fourth high-rigidity portion 28 are formed by wrapping a leather belt or the like around a part of the surface, The remaining portion can be the first low-rigidity portion 27 and the second low-rigidity portion 29. Alternatively, a desired rigidity distribution may be formed by changing the number of turns of the double-sided tape to be wound around the shaft into which the grip 20 is inserted in the axial direction. In order to easily cause bending in the first low-rigidity portion 27 and the second low-rigidity portion 29, the shaft portion into which the grip portion 30 is inserted is preferably thinner than the conventional one, and from the distal end side to the proximal end side The taper may be a reverse taper shape that gradually narrows toward the center.

  In the gripping unit 20 shown in FIG. 8, when the user is right-handed, the middle finger, the ring finger, and the little finger of the left hand grip the third high-rigidity portion 26, and the index finger of the right hand holds the fourth high-rigidity portion 28. It is preferable that the positions and the axial lengths of the third high-rigidity portion 26 and the fourth high-rigidity portion 28 are set so as to be gripped. According to this configuration, the swing is performed between the third high-rigidity portion 26 and the first low-rigidity portion 27 and between the fourth high-rigidity portion 28 and the second low-rigidity portion 29 as a fulcrum. It is possible to cause the first low-rigidity portion 27 and the second low-rigidity portion 29 to bend in different directions, and the above-described two-stage swing can be performed more easily.

  In addition to golf, the present invention can be applied to various ball games in a broad sense of hitting a ball-shaped hit object with a rod-like body, such as tennis and badminton rackets, ice hockey sticks, baseball bats, etc. Can be applied. Furthermore, the ball-shaped body for ball game of the present invention can be used for practice of throwing a ball such as a baseball, in addition to hitting a hit object. That is, in the rod-shaped body 1 shown in FIG. 1, as shown in FIG. 9, the gripping portion 20 is a spherical body having substantially the same size as a baseball, etc. By providing, the rod-shaped body 1 can be configured. According to the rod-shaped body 1 shown in FIG. 9, while the user performs a pitching operation with the gripping portion 20 as a ball, the flexure of the first high-rigidity portion 12 and the second high-rigidity portion 14 is imaged. The intermediate portion 19 can be made smooth, and an efficient throwing foam using inertial force can be easily experienced.

DESCRIPTION OF SYMBOLS 1 Rod-like body 10 for ball games Main body 12 1st highly rigid part 14 2nd highly rigid part 19 Intermediate | middle part 20 Gripping part 30 Strike part

Claims (5)

A ball-shaped body that can be used for a ball game or for its practice,
It has a grip on the base end side of the long body,
The main body includes a first high-rigidity portion and a second high-rigidity portion that are connected to each other via an intermediate portion,
Each of the first high-rigidity portion and the second high-rigidity portion has a flat cross-sectional shape, and is arranged so that the longitudinal directions of the flat shapes intersect with each other,
The intermediate portion is a ball-like rod-like body having a lower rigidity than the first high-rigidity portion and the second high-rigidity portion.   The ball body according to claim 1, wherein the main body includes a ball hitting portion at a tip portion.   The ball hitting bar according to claim 2, wherein the hitting portion includes a gravity center position adjusting means for adjusting the gravity center position.   The rod-like body for ball games according to claim 2 or 3, further comprising a moving body that moves relative to the striking portion by acceleration / deceleration of the striking portion. The gripping portion has a third high-rigidity portion, a first low-rigidity portion, a fourth high-rigidity portion, and a second low-rigidity portion arranged sequentially from the base end side toward the distal end side.
5. The ball-shaped rod for ball game according to claim 1, wherein the first low-rigidity part and the second low-rigidity part have lower rigidity than the third high-rigidity part and the fourth high-rigidity part. body.

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