JPH0358748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a batting practice machine for tennis, baseball, etc.

[Background technology]

BACKGROUND ART Conventionally, as a batting practice machine for tennis, baseball, etc., machines that hit the ball forward have been used. To perform various exercises, hold the ball in two positions: directly above and in front.
It is necessary to switch the direction of the ball when hitting the ball, and a batting practice machine that can switch the direction has been proposed.

However, there is no structure in which the launch strength is changed in conjunction with a change in the launch direction, and the direction and strength must be adjusted separately, which poses a problem in that the operations are difficult to perform.

[Purpose of the invention]

This invention provides a batting practice machine that can switch the ball in two directions, directly above and in front, and change the hitting strength in conjunction with the switching of the hitting direction, and has a simple structure for exercise. The purpose is to

[Disclosure of the invention]

The batting practice machine of the present invention includes: a casing having a ball supply hole and a ball launch hole adjacent to the ball supply hole and open on the top and front surface; an inner side of the ball supply hole and the ball launch hole; a ball receiving plate located astride the inside of the ball receiving plate, an arm extending from the ball receiving plate in a direction opposite to the front side of the ball ejection hole, and a spring hook hanging from the tip of the arm; a ball supporting means having a lever, the arm being pivotally supported on a rotating shaft so that the ball receiving plate can move up and down; and a ball supporting means disposed between the ball receiving plate and the rotating shaft to support the ball. a ball striking means having a hitting arm for hitting the ball on the receiving plate, and having a hitting spring suspended between the tip of the spring-loaded lever and the rear end of the hitting arm; The ball support plate is located at a position of the ball receiving plate where the placed ball is ejected from the top opening of the ball ejecting hole, and at a position of the ball receiving plate where the ball is ejected from the front opening of the ball ejecting hole. and locking means for removably locking the means.

According to the structure of the present invention, by rotating the ball support means around the rotation axis, the ball receiving plate is moved to a position where the ball is launched from the top opening of the ball launch hole or from the front opening of the ball launch hole. You can change the launch position. Additionally, as the ball support means rotates, the spring lever of the ball support means rotates around the rotation axis, so the position of the tip of the spring lever changes with respect to the ball ejecting means, so the spring force of the impact spring is reduced. The ball's launch force changes. Therefore, by rotating the ball support means, the ball launch direction and launch strength can be changed in conjunction with each other.

An embodiment of the invention is shown in FIGS. 1 to 4. That is, this batting practice machine has a casing 1
, ball support means 30 , and ball launch means 3
1 and a locking means 32.

The casing 1 has a ball supply hole 2 and, adjacent to the ball supply hole 2, a ball punching hole 3 that is open at the top and front surface. Ball supply hole 2
is formed on one side of the front part of the upper surface of the casing 1,
The ball punching hole 3 is formed from the other side of the upper surface to the front surface. Note that a handle 4 and a switch 5 are provided at the rear of the upper surface of the casing 1.

The ball support means 30 has a ball receiving plate 6 located astride the inside of the ball supply hole 2 and the inside of the ball ejecting hole 3, and the ball receiving plate 6 is located opposite to the front side of the ball ejecting hole 3. It has an arm 6a extending in the same direction, and a spring-loaded lever 6c hanging from the tip of the arm 6a, and the arm 6a is pivotally supported on a rotating shaft 8 so that the ball receiving plate 6 can move in the vertical direction. . The ball receiving plate 6 has a width in which the ball mounting portion 6d reaches from the ball supply hole 2 to the ball ejection hole 3.
The stopper wall 6b is formed on the side edge of the lower side, and a ball support plate 12 is erected on the base frame 9 along the rear edge of the ball rest 6d. Arm 6a extends rearwardly from stopper wall 6b. Further, the rotating shaft 8 is supported by a base 23.

The ball striking means 31 has a striking arm 7 that is disposed between the ball receiving plate 6 and the rotating shaft 8 and hits the ball M on the ball receiving plate 6, and has a striking arm 7 that is arranged between the ball receiving plate 6 and the rotating shaft 8 and hits the ball M on the ball receiving plate 6. The impact spring 22 is suspended between the rear end of the impact spring 7 and the rear end of the impact spring 22.

The striking arm 7 is fixed to a rotating shaft 13, and the rotating shaft 13 is supported by a base frame 9 and a gear case 16 by a pair of bearings 14 and 15. 17 and 18 are retaining rings. The striking arm 7 has a striking piece 19 at its tip and a spring locking pin 20 at its other end. A striking spring 22 is hung between the spring locking pin 20 and the spring locking pin 21 of the spring hooking lever 6c of the ball receiving plate 6. A gear 24 is attached to the rotating shaft 13 of the striking arm 7 via a one-way clutch (not shown), and a gear 24 is attached to the rotating shaft 13 of the motor 25 via a one-way clutch (not shown).
6 are engaged. The one-way clutch prevents the striking arm 7 from reversing and allows it to freely rotate in the forward direction (in the direction of arrow E in FIG. 3). The gear case 16 is fixed to the base frame 9, and the motor 25 is fixed to the gear case 16.

The locking means 32 determines the position of the ball receiving plate 6 where the ball M placed on the ball receiving plate 6 is ejected from the upper opening of the ball ejecting hole 3, and the position of the ball receiving plate 6 where the ball M placed on the ball receiving plate 6 is ejected from the front opening of the ball ejecting hole 3. The ball support means 30 is removably locked at the position of the ball receiving plate 6. This locking means 32 is connected to the ball receiving plate 6.
Switching handle 10 and switching handle 1 fixed to
Handle fitting hole 1 of casing 1 that penetrates 0
Consists of 1. The handle engagement hole 11 has engagement notches 11a and 11b on the upper and lower sides, and the handle 10 can selectively engage with these upper and lower engagement notches 11a and 11b. Board 6
The position where the ball M is launched from the top opening of the ball launch hole 3, and the position where the ball M is launched from the top opening of the ball launch hole 3.
It is positioned at the position where it is ejected from the front opening of.

Operation Ball M is fed from ball supply hole 2 to casing 1.
The ball enters the ball, rolls on the ball receiving plate 6, stops at a position where it abuts against the stopper wall 6b, and is driven out of the ball hitting hole 3 by the rotating hitting arm 7. FIG. 3 shows the state at the moment when the ball M is hit with the switching handle 10 engaged with the lower engagement notch 11b and the ball receiving plate 6 fixed downward. In this case, the ball is fired in the direction of arrow C, which is perpendicular to the angle of the hitting arm 7 at this time. That is,
Ball M is launched diagonally forward.

The launch operation will be explained. When the switch 5 is turned on, the motor 25 moves the striking arm 7 to the arrow E.
The percussion spring 22 is gradually expanded by being rotated in the direction shown in FIG. When the striking arm 7 rotates to an angle at which the striking spring 22 is fully extended, the striking arm 7 instantaneously rotates at high speed and strikes the ball M due to the restoring force of the striking spring 22 and the action of the one-way clutch.

Figure 4 shows how the switching handle 10 is connected to the upper engagement notch 1.
1a to fix the ball receiving plate 6 upward. At this time, the ball mounting portion 7d of the ball receiving plate 6 is at approximately the same height as the rotation axis 13 of the batting arm 7, and the batting arm 7 hits the ball M in a nearly horizontal state, so the ball M is As shown in D, it will be launched almost directly overhead. At this time, the spring locking pin 21 fixing one end of the impact spring 22 moves inward as the ball receiving plate 6 moves upward, so that the impact spring 22
Since the deflection length of the ball M is reduced, the force required to launch the ball M is smaller than when the ball is launched forward as shown in FIG. In this way, the switching handle 1
By simply changing the angle of the ball receiving plate 6 by changing the number 0, the hitting strength by the hitting arm 7 can also be changed, making adjustment easy. Moreover, the change in the launch angle and the change in the launch strength can be linked in this way by simply attaching the impact spring 22 to the ball receiving plate 7 instead of the base, so the structure for linkage is simple. It is.

FIG. 5 shows an example in which this batting practice machine is used for tennis batting practice. Figure 5 A shows the ball M being hit forward and then hitting the racket 3 after one bounce.
This shows the case where the ball is returned with a score of 0. The returned ball M is received by a net 28 supported by a pole 27 and returns from a guide rail 29 to the ball supply hole 2 of the casing 1 of this batting practice machine. FIG. 5B shows an example in which the ball M is hit directly above and returned without bouncing.
In this case, since the force for hitting the ball M is weak, the ball M can only rise to the height shown in the figure, making it easier to practice. If this height is set to the highest height of the ball M that has bounced once as shown in FIG. 5A, it will be easier to practice.

〔Effect of the invention〕

The batting practice machine of the present invention has a ball receiving plate that determines the direction in which the ball is launched, and a striking spring of the ball launching means is provided in the spring-loaded lever and the ball supporting means that are suspended between the rear end of the striking arm. By operating the ball support means, the ball launch direction and ball launch strength can be changed in conjunction with each other.
Moreover, the operability is improved and the structure is simplified.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a cross-sectional plan view thereof, FIG. 3 is a longitudinal side view showing the forward launch state, and FIG. 4 is the upward launch state. The longitudinal side view shown in FIGS. 5A and 5B are also explanatory views for its use. 1...Casing, 2...Ball supply hole, 3...
...Ball launch hole, 6...Ball receiving plate, 6a...
Arm, 6c...Spring lever, 7...Blow arm, 8...Rotary shaft, 22...Blow spring, 30...
Ball supporting means, 31...Ball launching means, 3
2...Locking means, M...Ball.

Claims (1)

[Scope of Claims] 1. A casing having a ball supply hole and a ball ejection hole adjacent to the ball supply hole and opened on the top and front surface; a spring-loaded lever that has a ball receiving plate located astride inside, has an arm that extends from the ball receiving plate in a direction opposite to the front side of the ball ejection hole, and that hangs down from the tip of the arm; a ball support means, the arm being pivotally supported on a rotating shaft so that the ball receiving plate can move in the vertical direction; and a ball supporting means disposed between the ball receiving plate and the rotating shaft, the ball supporting means a ball striking means having a striking arm for striking a ball on a plate, and having a striking spring suspended between the tip of the spring-loaded lever and the rear end of the striking arm; and a ball striking means placed on the ball receiving plate. The ball supporting means is located at a position of the ball receiving plate where the ball is ejected from the top opening of the ball ejecting hole, and at a position of the ball receiving plate where the ball is ejected from the front opening of the ball ejecting hole. A batting practice machine comprising a locking means for releasably locking a batting practice machine.