JPH0522205Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a batting practice machine used for practicing baseball, softball, etc.

(Prior art) Conventionally, a rotating arm with a ball suspended by a string is temporarily stopped, the string of the ball is wrapped around the rotating arm, and then the ball and string are automatically wound back to the original hanging position. The batting practice machine was made in 1973.
- Shown in Publication No. 13509.

(Problem to be solved by the invention) The batting practice machine described in the above conventional technology,
Practitioners may feel a little irritated because they have to wait until the string of the ball comes undone.

In order to eliminate this feeling of irritation, all you have to do is avoid getting caught. In other words, it would be fine to not apply restraint, but this would result in a delay before the next blow.

The object of the present invention is to provide a new batting practice machine that is designed to prevent the string from getting wrapped around the ball and to minimize the time lag before the next hit.

(Means for Solving the Problems) In order to achieve the above object, the batting practice machine according to the present invention has a transverse arm 15 fixed to the upper end of the column main body 4, and a position that can be moved to a position near the tip of the transverse arm 15. Fixed collar 17 and horizontal arm 15
An end stop plate 19 fixed to the tip of the end stop plate 19, a leather lining 18 stretched on the inner surface of the end stop plate 19, and a freely rotatable part between the collar 17 and the end stop plate 19 on the transverse arm 15. and a rotating ring 21 with a hanging member 20 fitted in a slidable manner, and a wire 22 attached to the hanging member 20.
The ball 23 hanging down through the rotating ring 21
and permanent magnets 24 and 25 fixed to the collar 17 with the same poles facing each other.

(Function) The launched ball 23 is allowed to rotate around the horizontal arm 15 by the free rotation of the rotating ring 21. When this ball is launched in the correct direction, it rotates in a circular trajectory on a virtual plane perpendicular to the horizontal arm 15, stalls, and stops at its original position (the position before hitting). Further, when the ball is launched in an incorrect direction, a so-called oblique direction, as the ball 23 rotates, the rotating ring 21 simultaneously rotates and reciprocates on the horizontal arm 15 every time the ball rotates once. When the rotating ring 21 moves toward the end stop plate 19 and comes into contact with the leather lining 18, it is momentarily stopped, and when it moves toward the collar 17, the repulsive force of both permanent magnets is applied to the collar 17. This prevents contact between the rotary ring 21 and the rotary ring 21 to avoid frictional braking that would otherwise occur due to such contact. That is, the ball 23 is repeatedly and slightly braked by the lining 18 on the one hand, and rotates without being braked by the collar 17 on the other hand. However, this rotation of the ball 23 does not continue for a long time, and the rotational force gradually weakens. In this case, when the braking force of the lining 18 overcomes the rotational force of the rotating ring 21 due to the rotation of the balls 23, the rotating ring 21 suddenly stops. Even if this stoppage occurs, the ball 23 tries to continue rotating due to inertia and moves as if wrapping around the horizontal arm 15. but,
At this time, the ball 23 is located outside the tip of the transverse arm 15, that is, at a location where the transverse arm 15 does not exist, and no longer winds around the ball 23. It should be noted that since the ball 23 is not braked by the collar 17 and rotates until it stalls naturally, even if the transverse arm 15 is present in the vicinity of the collar 17, it will not wrap around the ball 23.

When the ball is launched in an incorrect direction, it is braked by the inner lining 18, so the next launch is possible again in a shorter period of time than when the ball is launched in the correct direction. By recognizing the length of this return time, the practitioner can judge whether or not the ball was hit correctly.

(Effect of the invention) As described above, the batting practice machine according to the invention includes the transverse arm 15 fixed to the upper end of the column main body 4, the collar 17 movably fixed to a position near the tip of the transverse arm 15, and the transverse An end stop plate 19 fixed to the tip of the arm 15, a leather lining 18 stretched on the inner surface of the end stop plate 19, and a collar 1 on the horizontal arm 15.
Rotating ring 2 with a hanging member 20 fitted in a position between 7 and end stop plate 19 so as to be freely rotatable and slidable.
1, a ball 23 hanging from the hanging member 20 via a wire 22, a rotating ring 21, and a collar 17.
Permanent magnet 2 fixed with the same pole facing the
4 and 25, the brake is applied little by little as mentioned in the above-mentioned operation, and it does not wrap around, making it an excellent product that can completely achieve the intended purpose. This is effective, and is convenient because when using it, as mentioned above, it is possible to determine whether the shot is correct or incorrect by comparing the length of time it takes to return to the state where the next shot is possible.

(Embodiment) In the embodiment of the present application shown in FIG. 1 and FIG. A square pipe strut body 4 with a slightly smaller diameter is inserted from above, and the strut body 4 is connected to the strut standpipe 3 so as to be movable up and down, and a chain is fixed to the side of the strut body 4 so that it can be oriented vertically. A rack 5 is installed and a support standpipe 3 is installed.
A pinion 7 that meshes with the rack 5 through a through hole 6 is attached to the side surface of the rack 5 using a central shaft 8 and a support shaft member 9. Furthermore, an annular manual handle 10 is fixed to the central shaft 8. A plurality of insertion holes 13 are formed in the outer circumference of the support column 11 in a radial arrangement, and the tip of the lever 13 is inserted into one of these insertion holes 12 in a removable manner. A horizontal arm 15 is fixed, and a collar 17 with a tightening screw 16 is repositionably fitted to a portion near the tip of the arm 15, and an end stop plate 19 with a leather lining 18 is fastened to the tip of the arm 15. A rotary ring 21 with a metal hanging member 20 is fitted in the arm 15 between the collar 17 and the end stop plate 19 so as to be freely rotatable and slidable. A ball 23 is suspended from the hanging member 20 of the rotating ring 21 with a metal wire 22, and a pair of permanent magnets 2 are attached to the rotating ring 21 and the collar 17.
4 and 25 are fixed with the same poles facing each other,
The repulsive force generated by these two magnets is set to such a magnitude that the rotating ring 21 returns to the middle of the sliding range.

In the figure, reference numeral 27 indicates a fixing screw for stopping vertical movement of the column main body 4, and reference numeral 28 indicates an anchor driving ring.

Furthermore, the present invention can also be implemented in a fixed manner by directly attaching the pedestal.

In the above embodiment, the practitioner hits the ball 23 with a bat, and the coach swings the lever 13 during the practitioner's swing to rotate the handle 10 and pinion 7 forward and reverse in small increments, thereby causing the prop body 4. The arm 15 and the ball 23 are moved up and down as appropriate, and the ball 23 is used for purposes such as batting practice in which the player can keep up with changes in the height of the ball 23.

Incidentally, when the practitioner practices alone without a coach, the height of the ball 23 can be appropriately determined by fixing the support main body 4 with the fixing screw 27.

In addition, by changing the position of the collar 17 using the tightening screw 16, the length of the reciprocating range of the rotary ring 21 can be adjusted, making fine adjustments to prevent twisting and adjusting the difficulty of striking. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entire embodiment of the present application, and FIG. 2 is a sectional view. 1... Tripod mount, 2... Frame, 3... Prop standpipe,
4... Prop body, 5... Rack, 6... Through hole, 7
... Pinion, 8 ... Center shaft, 9 ... Support shaft member,
10...Manual handle, 11...Ring part, 12
...Insertion hole, 13...Lever, 15...Arm,
16...Tightening screw, 17...Collar, 18...Inner lining, 19...End stop plate, 19'...Tightening bolt, 2
0... Hanging member, 21... Rotating ring, 23...
Wire, 23...Ball, 24, 25...Magnet, 27...Fixing screw, 28...Driving ring,
30...Coil spring.

Claims (1)

[Scope of utility model registration request] Lateral arm 15 fixed to the upper end of the column main body 4
, a collar 17 fixed to a position near the tip of the transverse arm 15 in a repositionable manner, an end stop plate 19 fixed to the tip of the transverse arm 15 , and a leather lining 18 stretched over the inner surface of the end stop plate 19 . , a rotating ring 21 with a hanging member 20 fitted in a position between the collar 17 and the end stop plate 19 on the horizontal arm 15 so as to be freely rotatable and slidable, and a wire 22 connected to the hanging member 20. This batting practice machine is characterized by comprising a ball 23 hanging down, and permanent magnets 24 and 25 fixed to a rotating ring 21 and a collar 17 with the same poles facing each other.