JP2005080912A - Training machine for swinging practice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a training machine for swinging practice allowing any user to strengthen the muscular power and increase the head speed in a narrow space without being tired while enjoying the impact, hitting sound, touch and reality felt when actually hitting a ball, to obtain an always stable swinging trajectory, and thereby to easily master sharp swing using the lower half body of the user. <P>SOLUTION: The training machine for swinging practice comprises a shaft 2, a grip 3 disposed at the base end 2a of the shaft 2, a hitting member 6 mounted on the shaft 2 to be movable in the axial direction, and a hit member 5 mounted at the distal end 2b of the shaft 2 to generate the impact force and hitting sound by the hitting of the hitting member 6. The training machine also has a balance weight 4 for balancing the grip side GS and the head side when the hitting member 6 is moved to the distal end 2b of the shaft 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention can be used by anyone regardless of age or gender for practicing ball games that use ball hitting equipment such as baseball, tennis, golf, or table tennis, or to eliminate lack of exercise. This is related to a practice device for swinging.

   In general, the practice of swinging such as baseball, tennis, golf, table tennis, and kendo only swings a hitting tool such as a bat or a racket.

  However, in the practice of swinging only by swinging the hitting tool described above, there is no change and it is monotonous, and the impact force, hitting sound or realism when hitting a ball etc. is not obtained, and even if you do it, you get bored immediately. There were many things.

  Therefore, it removes the drawbacks of the general hitting tools mentioned above, and anyone can increase muscle strength and head speed in a small space while enjoying the impact, striking sound, feel, and realism of hitting a ball. There has been proposed a training device for timeless swinging (see, for example, Patent Document 1).

  In such a conventional practice device for swinging, a hit member is fixed to the tip of a shaft having a base end as a grip, and an impact force is applied to the hit member and the shaft between the grips by a collision with the hit member. In addition, it is configured by slidably fitting a striking member that generates a striking sound. By gripping the grip and bringing the striking member into contact with the inner end of the grip and swinging, centrifugal force and inertia generated by the swinging motion are generated. The striking member moves toward the tip along the shaft and collides with the hit member.However, the impact speed when the striking member collides with the hit member increases as the swing speed increases and the trajectory of the swing is closer to the arc. It becomes large and can obtain good impact force, impact sound, feel and the like.

JP-A-8-024386

  However, in the conventional practice device for swinging as described above, although a good impact force, hitting sound, feel, etc. can be obtained, if the hitting member moves to the tip due to centrifugal force and inertia due to swinging, the grip of the swinging bat Since the hand at the side is lighter, the head of the swinging bat is lowered, the arm, elbow, etc. are burdened, the swing trajectory is distorted, and the foam is liable to collapse.

  So, while enjoying the impact, striking sound, feel, and realism of hitting a ball etc., anyone can increase muscle strength and head speed in a narrow space, and always have a stable swing There is a need for a swing exerciser that can obtain a trajectory and can easily acquire a sharp swing using the lower body.

  The present invention has been made in view of this point, and anyone can increase muscle strength and head speed in a narrow space while enjoying the impact force, striking sound, feel, and presence when actually hitting a ball. In addition to being able to get tired, it is an object of the present invention to provide an exerciser for swinging that can always obtain a stable swing trajectory and can easily acquire a sharp swing using the lower body.

  In order to achieve the above-described object, the practicing device for swinging according to claim 1 of the present invention is characterized by a shaft, a grip provided at a base end portion of the shaft, and an axis of the shaft. In the practice device for swinging, the striking member has a striking member movably provided along a direction, and a striking member that is provided at the tip of the shaft and generates impact force and striking sound by collision of the striking member. When moving to the tip of the shaft, a counterweight is provided to balance the grip side and the head side. By adopting such a configuration, the striking member is brought into contact with the inner end of the grip by gripping the grip, and the striking member is moved to the tip along the shaft by the centrifugal force and inertia generated by the swinging. It moves and collides with the hit member, but the higher the swing speed and the closer the trajectory of the swing to the arc, the greater the impact when the hit member collides with the hit member, resulting in better impact force, impact sound, and feel. In addition, the balance between the grip side and the head side when the striking member moves to the tip due to centrifugal force and inertia due to swinging can be easily taken. It can prevent the grip side from becoming light.

  According to a second aspect of the present invention, there is provided a swing training device according to the first aspect of the present invention, wherein the counterweight has a weight on the grip side when the striking member moves to the tip of the shaft. It is in the point formed so that it may be heavier than.

  According to a third aspect of the present invention, the practice device for swinging according to the present invention is characterized in that, in the first or second aspect, a cylindrical counterweight attachment portion that opens at the end surface of the base end portion at the base end portion of the shaft. And the counterweight is attached to the counterweight attachment portion.

  According to a fourth aspect of the present invention, the practice device for swinging according to the present invention is characterized in that, in any one of the first to third aspects, an adjusting means capable of adjusting a mounting position of the counterweight is provided. is there.

  According to the practice device for swinging according to the first aspect of the present invention, anyone can enjoy the impact force, the hitting sound, the touch, and the sense of presence when actually hitting a ball, etc. In addition to being tired of being able to strengthen, it is possible to always obtain a stable swing trajectory, thereby producing extremely excellent effects such as being able to easily acquire a sharp swing using the lower body.

  According to the practice device for swinging of the present invention according to claim 2, since the shaft can be heavier than the hand of the shaft during swinging, it is possible to more reliably prevent the head from falling down. Play.

  According to the practice device for swinging according to the third aspect of the present invention, there is an extremely excellent effect that the counterweight can be easily placed in a portion that does not interfere with swinging.

  According to the practice device for swinging according to the fourth aspect of the present invention, fine adjustment of the balance between the grip side and the head side when the striking member moves to the tip due to centrifugal force and inertia due to swinging can be easily performed. There are extremely excellent effects such as.

  The present invention will be described below with reference to embodiments shown in the drawings.

  1 to 6 show a first embodiment of a swing bat to which a swing training device according to the present invention is applied. FIG. 1 is a schematic external perspective view showing the main part of the overall configuration, and FIG. FIG. 3 is an enlarged front view of a partly cut showing the grip side of FIG. 1 upward, FIG. 4 is an enlarged front view of a part of the grip part of FIG. 3, and FIG. FIG. 6 is an enlarged half cross-sectional front view, and FIG. 6 is a view similar to FIG. 3 showing an example of adjusting the mounting position of the counterweight.

  The swing bat of this embodiment is an example of a baseball swing bat.

  As shown in FIGS. 1 to 3, a baseball swing bat 1 as a swing training device of the present embodiment has a shaft 2 formed in a substantially linear shape. A grip 3 and a counterweight 4 are provided on the base end 2a (FIG. 3) of the shaft 2 shown in the diagonally lower left part (upper part of FIG. 3) of FIG. A hit member 5 is provided at the tip 2b (FIG. 3) shown in the lower part of FIG. Further, a striking member 6 is provided between the grip 3 on the outer periphery of the shaft 2 and the hit member 5 so as to be movable along the axial direction on the outer periphery of the shaft 2. The swinging bat 1 has a grip that the diagonally lower left part (upper part of FIG. 3) on the base end 2a side of the shaft 2 is a part that the user grips when performing swinging. 1 is the head side HS located on the opposite side to the grip side GS. The upper right side in FIG. 1 (the lower side in FIG. 3) on the tip 2b side of the shaft 2 is the side GS.

  The shaft 2 of the present embodiment is made of a material having high rigidity such as a stainless steel pipe, and is formed in a cylindrical shape having an outer diameter of about 19 mm, a thickness of about 1 mm, and a length of about 1 m, for example. As shown in detail in FIG. 4, the outer periphery of the base end portion 2 a located on the grip side GS of the shaft 2 is a grip attachment portion 7 for attaching the grip 3, and the inner hole 2 c of the shaft 2 is formed. The base end portion 2 a is a counterweight attaching portion 8 for attaching the counterweight 4.

  That is, the cylindrical counterweight attachment part 8 opened to the end surface of the base end part 2a is formed by the base end part 2a of the inner hole 2c of the shaft 2.

  In the vicinity of the base end portion 2a of the shaft 2, a pair of mounting holes 10 for mounting a fixing pin 9 for fixing the grip 3 and the counterweight 4 to the shaft 2, as shown in detail in FIG. 2 is formed coaxially so as to penetrate through 2 in the radial direction. A fixing bolt may be used instead of the fixing pin 9. In this case, one of the pair of mounting holes 10 may be a through hole through which the fixing bolt can be inserted, and the other may be a screw hole into which the fixing bolt can be screwed. Further, as shown in FIGS. 2 and 3, a flange 11 having a diameter larger than the outer diameter of the shaft 2 is provided around the tip 2 b positioned on the head side HS of the shaft 2.

  In addition, what is necessary is just to set the shape, size, weight, material, etc. of the shaft 2 as needed, such as the specification and design concept of the practice device for swinging. For example, the shape of the shaft 2 may be a bottomed cylindrical shape with the head side HS as the bottom.

  As shown in FIGS. 3 and 4, the grip 3 is attached to the grip mounting portion 7 of the shaft 2 so as to cover the outer periphery of the base end portion 2 a of the shaft 2. As shown in detail in FIG. 4, the grip 3 of the present embodiment includes a substantially cylindrical grip body 12 having a diameter larger than the outer diameter of the shaft 2, and an outward flange on the grip side GS of the grip body 12. And a grip end 13 formed in a shape. As shown in FIG. 1, an anti-slip tape 14 is wound around the outer periphery of the grip body 12. Further, as shown in detail in FIG. 4, the grip end 13 has a pair of through holes 15 through which the fixing pins 9 used when fixing the grip 3 to the shaft 2 are inserted, and penetrates the grip end 13 in the radial direction. And is formed on the same axis.

  The material of the grip 3 can be selected from various materials such as wood, metal, resin and rubber according to the specifications of the practice device for swinging and the design concept. The grip 3 of this embodiment is formed by processing wood.

  The shape, size, weight, attachment method to the shaft 2 and the like of the grip 3 may be set as required according to the specifications and design concept of the swing exerciser. For example, the outer periphery of the grip side GS of the shaft 2 may be directly configured as the grip 3 by winding the tape 14 around the outer periphery of the grip side GS of the shaft 2. Further, as a method of attaching the grip 3 to the shaft 2, welding or joining using an adhesive may be used.

  The counterweight 4 is used for balancing the grip side GS and the head side HS of the swinging bat 1 when the striking member 6 moves to the tip due to centrifugal force and inertia caused by swinging during swinging. 3 and 4, the base end 2a of the inner hole 2c of the shaft 2, that is, the base end 2a is attached to the counterweight mounting portion 8 so as to close the opening. ing. The counterweight 4 of this embodiment is formed in a substantially bar-shaped weight main body 16 having a diameter smaller than the inner diameter of the inner hole 2c of the shaft 2, an outward flange shape on the grip side GS of the weight main body 16, and A weight stopper 17 having a diameter larger than the outer diameter of the shaft 2 is provided. Further, as shown in detail in FIG. 4, the weight body 16 has a plurality of fixing pins 9 to be used when fixing the counterweight 4 to the shaft 2, and in this embodiment, three insertion holes 18, 19 and 20 are aligned and arranged at predetermined intervals along the axial direction of the weight main body 16. Note that the three insertion holes 18, 19, 20 and their intervals are exaggerated. Further, the number and interval of the insertion holes 18, 19, and 20 may be set as required according to the specifications, design concept, etc. of the practice device for swinging.

  The weight body 16 of the counterweight 4 is inserted into the shaft 2 from the opening end of the grip side GS of the inner hole 2c of the shaft 2, and is provided in the inner hole 2c of the base end portion 2a of the shaft 2. It is attached to the weight attaching portion 8 and is fixed to the shaft 2 by a fixing pin 9 inserted into any one of the three insertion holes 18, 19, 20. For example, as shown in FIG. 4, in the initial state, the fixing pin 9 is inserted into the insertion hole 18 arranged on the most grip side GS.

  In the counterweight 4 of the present embodiment, the mounting position of the counterweight 4 with respect to the shaft 2 is changed along the axial direction of the shaft 2 by selecting the insertion holes 18, 19, 20 in which the fixing pins 9 are inserted. It is possible.

  However, the counterweight 4 according to the present embodiment has a striking member that depends on the centrifugal force and inertia of the swing during the swing regardless of whether the fixed pin 9 is inserted into any of the three insertion holes 18, 19, 20. When 6 moves to the tip of the shaft 2, the grip side GS of the swinging bat 1 is made heavier than the head side HS.

  The fixing pin 9 and the plurality of insertion holes 18, 19, 20 formed in the weight body 16 of the counterweight 4 constitute an adjusting means 21 that can adjust the mounting position of the counterweight 4 of the present embodiment. Yes.

  The adjusting means 21 is not limited to the configuration of the plurality of insertion holes 18, 19, 20 formed in the weight body 16 of the fixing pin 9 and the counterweight 4 of the present embodiment. The main body 16 is screwed into the inner hole 2c on the grip side GS of the shaft 2, and the position of the weight main body 16 in the axial direction is adjusted steplessly according to the amount of the weight main body 16 screwed into the inner hole 2c of the shaft 2. The mounting position of the counterweight 4 with respect to the shaft 2 can be adjusted in the axial direction of the shaft 2 such as a configuration in which the fixing position in the axial direction of the weight main body 16 is set by a fixing nut disposed on the weight stopper 17 side of the main body 16. Any configuration can be used.

  The material of the counterweight 4 can be selected from various materials such as wood, metal, resin, and rubber according to the necessity of the specification and design concept of the swing exerciser. The counterweight 4 of this embodiment is formed by processing a metal.

  Further, the shape, size, weight, etc. of the counterweight 4 may be set as required according to the specifications and design concept of the swing exerciser. For example, it is good also as a structure which encloses lead etc. with large specific gravity by making a hollow into an inside. However, as described above, it is important to make the weight of the grip side GS of the swing bat 1 heavier than the weight of the head side HS during swinging.

  As shown in FIG. 3, the hit member 5 is held by a flange 11 having a diameter larger than the outer diameter of the shaft 2 that functions as a stopper provided around the tip of the shaft 2. The hit member 5 has a cylindrical shape made of metal, wood, resin, or the like, and the center hole 22 of the hit member 5 includes a small-diameter hole 22a disposed on the grip side GS and a head side. A large-diameter hole 22b arranged in the HS is a stepped hole connected by a step portion 22c. Further, the small diameter hole 22 a is formed substantially equal to the outer diameter of the shaft 2, and the large diameter hole 22 b is formed approximately equal to the outer diameter of the flange 11. The hit member 5 is held at the tip 2b of the shaft 2 by extending the shaft 2 from the small-diameter hole 22a of the center hole 22 so that the flange 11 of the shaft 2 is in contact with the step 22c. Has been. The large-diameter hole 22b of the center hole 22 is sealed by a plug 23 that is closely fitted in the large-diameter hole 22b. The hit member 5 of this embodiment is formed by processing wood.

  Various hitting sounds can be generated by hitting the hitting member 6 by selecting the material of the hitting member 5 or enclosing water or air with a hollow inside.

  The striking member 6 is made of rubber or resin so as to have a certain weight and has a cylindrical shape, and is slidably fitted to the shaft 2 as shown in FIG. The inner diameter of the central hole 24 of the striking member 6 is slightly larger than the outer diameter of the shaft 2, so that the striking member 6 can freely move along the shaft 2. When the striking member 6 collides with the striking member 5 at a high speed, an impact force is transmitted to the shaft 2 and a striking sound is generated.

  As shown in FIG. 3, in the vicinity of the grip 3 on the outer periphery of the shaft 2, along the shaft 2 of the striking member 6 with the inner end surface 5 a located on the grip side GS of the striking member 5 as the final moving end. A stopper 25 for adjusting the movement range is fixed to the shaft 2 so that the movement can be adjusted. Further, a scale 26 for selecting a fixing position of the stopper 25 is formed on the surface of the shaft 2. As shown in detail in FIG. 5, the scale 26 displays the ball speed of the pitcher in baseball, and displays a scale line such that the ball speed increases as the distance from the hit member 5 to the stopper 25 increases. Has been. This is because when the distance from the hit member 5 to the stopper 25 increases, the acceleration of the hit member 6 also increases, so that the impact when the hit member 6 collides with the hit member 5 increases. This is because it feels like a strike. A numerical value representing the ball speed is attached to a predetermined position in the scale line display.

  As shown in FIG. 5, the stopper 25 is formed in a cylindrical shape that is made of metal or resin and can be fitted to the shaft 2. The inner diameter of the center hole 27 of the stopper 25 is the outer diameter of the shaft 2. The stopper 25 can move freely along the shaft 2. The stopper 25 is formed with a screw hole 28 extending in the radial direction, and a set screw 29 screwed into the screw hole 28 is screwed into pressure contact with the surface of the shaft 2. Thus, the stopper 25 can be fixed at an arbitrary position on the shaft 2. At this time, the scale line of the scale 26 that coincides with the outer end face 30 located on the head side HS of the stopper 25 has a corresponding ball speed.

  In addition, when the striking member 6 is brought into contact with the outer end surface 30 on the head side HS of the stopper 25, a holding member that can be temporarily retained to prevent the striking member 6 from moving due to its own weight, for example, a magnet It is good also as a structure which provides. In this case, it is important to form at least the end surface of the striking member 6 on the grip side GS with an adsorbing piece that can be adsorbed by a magnetic force. Furthermore, it is preferable that the magnetic force of the magnet be such that the striking member 6 attracted and held by the stopper 25 is quickly detached from the stopper 25 without feeling resistance when swinging.

  The stopper 25 can be selected and used from a wide variety of configurations such as a configuration that can be expanded and contracted in the axial direction.

  To assemble the swing bat 1 of this embodiment, as shown in FIG. 2, the shaft 2 is inserted into the hit member 5 from the base end 2 a side, and the step portion 22 c of the hit member 5 is connected to the flange 11. When contacted, the large-diameter hole 22 b of the hit member 5 is sealed with the plug body 23. Next, the shaft 2 is inserted into the striking member 6 and the stopper 25 from the base end portion 2a side, and the grip end 13 and the counterweight 4 are respectively inserted into the outer periphery of the base end portion 2a of the shaft 2 and the inner hole 2c. The grip end 13 and the counterweight 4 are both fixed by the fixing pin 9 and the tape 14 is wound around the grip 34 of the shaft 2.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  According to the swing bat 1 of the present embodiment, for example, the weight of the striking member 6 is 800 g, the stopper 25 is fixed at a position of 150 km / h, the grip 3 is gripped and the striking member 6 is brought into contact with the stopper 25, By striking at a high head speed, the striking member 6 moves along the shaft 2 and collides with the striking member 5 due to the centrifugal force and inertia generated by the swinging. At this time, when hitting a ball at a speed of 150 km / h The same impact force is transmitted to the arm, and a loud hitting sound is generated, providing a sense of presence.

  Also, if the swinging bat 1 is swung on the assumption of a pitcher's pitching course, depending on the pitching course, there are easy swinging courses and difficult swinging courses. Since the head speed decreases in the course, a different feel can be obtained according to the pitching course of the pitcher.

  Thus, according to the swinging bat 1 of the present embodiment, it is possible to obtain a good impact force, impact sound, feel, etc. according to the ball speed set by the stopper 25. Of course, it is possible to obtain impact force, striking sound, feel and the like according to the head speed without providing the stopper 25.

  Furthermore, according to the swinging bat 1 of the present embodiment, the balance between the proximal end 2a side and the distal end 2b side of the shaft 2 when the striking member 6 moves to the distal end due to the centrifugal force and inertia due to the swinging, that is, Since the balance between the grip side GS and the head side HS of the swing bat 1 can be easily taken, it is possible to prevent the hand of the shaft 2 from becoming lighter during swinging. As a result, when swinging, the shaft 2 is lighter than the hand, which lowers the head, imposes a burden on the arm, elbow, etc., causes the swing trajectory to become unstable (blur), and easily inconveniences that the foam tends to collapse. Can be prevented.

  Therefore, according to the swing bat 1 of the present embodiment, anyone can increase muscle strength and head speed in a narrow space while tasting the impact force, striking sound, feel, and presence when actually hitting a ball. In addition to being able to get tired, you can always get a stable swing trajectory, which makes it easy to acquire a sharp swing using the lower half of the body, with the head not naturally lowered, hand hitting, naturally tightening the sides it can.

  Further, according to the swinging bat 1 of the present embodiment, when the counterweight 4 moves the striking member 6 to the distal end portion 2b of the shaft 2, the swinging bat 1 on the base end portion 2a side of the shaft 2 is used. The grip side GS is made heavier than the weight of the head side HS of the swing bat 1 on the tip 2b side of the shaft 2, so that the hand of the shaft 2 becomes lighter during swinging. Can be prevented more reliably.

  Further, according to the swinging bat 1 of the present embodiment, the cylindrical counterweight that opens to the end surface of the base end 2a is formed on the base end 2a of the shaft 2 located on the grip side GS of the swinging bat 1. Since the mounting portion 8 is provided and the counterweight 4 is attached to the counterweight mounting portion 8, the counterweight 4 is placed at the base end 2 a of the inner hole 2 c of the shaft 2, that is, a portion that does not interfere with swinging. It can be easily arranged.

  Further, according to the swinging bat 1 of the present embodiment, since the adjusting means 21 capable of adjusting the mounting position of the counterweight 4 is provided, the striking member 6 has moved to the tip due to centrifugal force and inertia caused by swinging. Fine adjustment of the balance between the grip side GS of the swinging bat 1 on the base end 2a side of the shaft 2 and the head side HS of the swinging bat 1 on the distal end 2b side of the shaft 2 is easily performed. Can do.

  That is, the swing bat 1 of the present embodiment is changed by a simple operation of inserting the fixing pin 9 into any of the three insertion holes 18, 19, 20 formed in the weight body 16 of the counterweight 4. The attachment position of the weight 4 can be easily adjusted. As a result, fine adjustment of the balance between the grip side GS and the head side HS of the swing bat 1 can be easily performed.

  For example, when the grip side GS feels light during swinging, the mounting position of the counterweight 4 is adjusted. That is, the fixing pin 9 inserted in the insertion hole 18 of the most grip side GS shown in FIG. 4 is removed, the counterweight 4 is moved to the grip side GS, and as shown in the adjustment example of FIG. By inserting the fixing pin 9 into the insertion hole 20 of the side HS, the grip side GS can be made heavier than the state shown in FIG.

  As described above, according to the adjusting means 21 of the swinging bat 1 of the present embodiment, the balance between the grip side GS and the head side HS of the swinging bat 1 can be finely adjusted. Can be set according to the user's physique and preferences.

  7 and 8 show a second embodiment in which the device for practicing swinging according to the present invention is applied to a swinging bat, FIG. 7 is an enlarged half sectional front view of a scale portion of a shaft, and FIG. 8 is a stopper portion. FIG.

  The swinging bat 34 of this embodiment uses a stopper 35 different from the stopper 14 used in the swinging bat 1 of the first embodiment described above.

  In this embodiment, the surface of the shaft 2 in the range in which the stopper 35 can move is provided with an elongated rectangular recess 36 along the longitudinal direction of the shaft 2 as shown in FIG. A scale 26 for selecting a fixing position of the stopper 35 is formed on the surface of the recess 36.

  On the other hand, a male screw portion 37 is engraved on the surface of the shaft 2 in a range where the stopper 35 can move except for the inside of the concave portion 36. The stopper 35 has a female screw portion 38 which is screwed into the male screw portion 37. It has a cylindrical bolt 40 engraved in 39. On the outer peripheral side of the bolt 40, a large-diameter rotation operation portion 41 that is knurled at intervals in the axial direction and a small-diameter male screw portion 42 are formed at intervals in the axial direction. .

  The stopper 35 has a nut 43, and a central hole 44 of the nut 43 has a first female screw portion 45 that is screwed into the male screw portion 37 of the shaft 2, and a step that is coaxial with the first female screw portion 45. The second female screw portion 47 is provided continuously through the portion 46 and screwed into the male screw portion 42 of the bolt 40. On the outer peripheral side of the nut 43, a rotation operation portion 48 having the same diameter as the rotation operation portion 41 of the bolt 40 and subjected to knurling is formed.

  In the center hole 44 of the nut 43, an annular space 50 surrounded by the step portion 46, the second female screw portion 47, and the front end surface 49 of the bolt 40 is formed. A double annular elastic member 51 made of resin or metal is disposed. The structure of other parts not shown in the figure is the same as that of the swinging bat 1 of the first embodiment described above.

  According to such a configuration, the nut 43 of the stopper 35 is separated from the bolt 40, the end edge 52 of the nut 43 is aligned with the desired scale 26 in the recess 36 of the shaft 2, and then the bolt 40 is The male screw portion 42 of the bolt 40 is screwed into the second female screw portion 47 of the nut 43. Then, the bolt 40 and the nut 43 are integrated so that the front end surface 49 of the bolt 40 bends the double annular elastic member 51 in the annular space 50. Then, the bolt 40 and the nut 43 receive a force in a direction away from each other by the spring force stored in the bent double annular elastic member 51, and the bolt 40 and the nut 43 are not actively driven to rotate. As long as you stay in each position.

  Therefore, according to the configuration of the stopper 35 of the swinging bat 34 of the present embodiment, unlike the stopper 14 of the swinging bat 1 of the first embodiment, the stopper 2 is not damaged by the set screw 29 on the surface of the shaft 2. 35 can be stopped at a predetermined position on the shaft 2.

  In addition, this invention is not limited to each embodiment mentioned above, A various change is possible as needed. For example, in each embodiment, a baseball game has been described, but it may be formed in a shape that approximates tennis or table tennis rackets, golf clubs, kendo bamboo swords, wooden swords, and the like.

Schematic external perspective view showing the main part of the overall configuration of the first embodiment of the practice device for swinging according to the present invention Exploded view of FIG. Partial cut enlarged front view showing the grip side of FIG. FIG. 3 is a partially cut enlarged front view of the grip portion of FIG. Enlarged half-section front view of the scale portion of FIG. The same figure as FIG. 3 showing an example of adjusting the mounting position of the counterweight Enlarged half cross-sectional front view of the scale portion of the second embodiment in which the practice device for swinging according to the present invention is applied to a swinging bat. Enlarged half-section front view of the stopper

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 34 Element swinging bat 2 Shaft 2a Base end part 2b Front end part 2c Inner hole 3 Grip 4 Counterweight 5 Impact member 6 Impact member 7 Grip attachment part 8 Counterweight attachment part 9 Fixing pin 18, 19, 20 Insertion Hole 21 Adjusting means 25, 35 Stopper

Claims (4)

A shaft, a grip provided at the base end portion of the shaft, a striking member movably provided along the axial direction of the shaft, and an impact caused by a collision of the striking member provided at the distal end portion of the shaft In an exercise device for swinging having a striking member that generates force and striking sound,
An exerciser for swinging according to claim 1, further comprising a counterweight for balancing the grip side and the head side when the striking member moves to the tip of the shaft. 2. The counterweight according to claim 1, wherein the counterweight is formed so that a weight on a grip side is made heavier than a weight on a head side when the striking member moves to a tip portion of the shaft. Practice device for swinging. A cylindrical counterweight attachment portion that opens to an end surface of the base end portion is provided at a base end portion of the shaft, and the counterweight is attached to the counterweight attachment portion. The practice device for swinging according to claim 1 or claim 2. The practice device for swinging according to any one of claims 1 to 3, wherein an adjusting means capable of adjusting a mounting position of the counterweight is provided.