JPH0422596B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to a batting practice machine for baseball and tennis.

[Background technology]

Conventionally, this type of batting practice machine has used a rotating pitching arm to hit a ball placed in a fixed position. Also, attempts have been made to have a structure in which the tip of the pitching arm holds the ball and rotates the pitching arm to throw the ball. However, in any case, the ball throwing motion of the pitching arm cannot be visually confirmed, and therefore there is a problem in that it is difficult to determine the timing of batting.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a batting practice machine in which the ball throwing motion can be visually confirmed and the timing of the batting can be easily determined.

[Disclosure of the invention]

The batting practice machine of the present invention is provided with a ball discharging port located in front of a ball discharging section in the main body case so that the pitching operation of the ball discharging section can be seen from the front. Further, a ball supply section for supplying balls to the ball discharging section is provided on the side surface of the main body case, and the main body case is divided into two parts consisting of a right cover and a left cover, and on the lower inner wall of each cover, A ball guide rail is provided to place the balls on top of each other.

According to this configuration, since the ball throwing opening is provided on the front surface of the main body case, the inside of which can be seen, the practitioner can visually see the movement when throwing out the ball, making it easier to time the ball. Moreover, since the ball supply section is provided on the side of the main body case and the ball guide rail is provided at the bottom of the main case, the practitioner can visually see all the movements from feeding the ball to the ball guide rail to throwing the ball out. You can check it and practice in a way similar to the actual practice of Tosbatsutetsuung. Therefore, it is easier to time the blow. Further, since the main body case is divided into two parts, a right cover and a left cover, and a ball guide rail is provided on each cover, molding of the main body case is easy.

Embodiment An embodiment of the present invention is shown in FIGS. 1 to 10. In the figure, 1 is a main body case, which is divided at the center into a left main body cover 1A and a right main body cover 1B, and is provided with a front cover 1C. The main body case 1 has a ball throwing opening 2 on the front side,
It has a ball feeding port 3 on the side. A pair of parallel guide rails 4 are provided inside the main body case 1 to receive a ball M fed from a ball feeding port 3 formed on the side surface of the main body case 1, and a ball pitching arm 6 and a ball setting arm 7 are provided. , these drive mechanisms are housed together with a U-shaped frame 8. The pitching arm 6, the ball setting arm 7, and the guide rail 4 constitute a ball discharging section. A ball supply receptacle 11 is attached to the ball feed port 3 , and a first ball stocker 9 formed of a pipe material is connected to this, and a second ball stocker 1 is connected to the first ball stocker 9 .
0 is concatenated. 12 is a leg, and 13 is a feed cover.

The driving means for the pitching arm 6 will be explained. The pitching arm 6 is made of a wire spring, and is deflected by the rotation of the cam 14, and when it comes off the cam 14, its tip rotates by the elastic force of the deflection, and throws out the ball M. Specifically, the pitching arm 6 consists of two parallel unit arms 6A and 6B (FIG. 3).
A torsion coil spring portion 15 is integrally extended at the base end of each unit arm 6A, 6B. The tips of each unit arm 6A, 6B are inclined and continuous in the direction of rotation, and the ball M is
The ball holding portion 6C can be held at three points: the parallel portion of B and the continuous portion. pitching arm 6
Cam follower 16 (Fig. 4) is located in the middle of the length direction.
is rotatably mounted, and the cam follower shaft 17 is fixed by welding or the like. The pitching arm 6 is supported by a torsion coil spring part 15 rotatably fitted onto a pipe-shaped arm support shaft 18 (FIG. 5), and an engaging part 15a provided at the tip of the torsion coil spring part 15.
is engaged with the arm spring holding portion 20 of the frame 8. The arm support shaft 18 is attached to the frame 8. The cam follower 16 is in rolling contact with the cam 14.

The diameter of the cam 14 gradually increases in the rotational direction,
There is a discontinuous small path along the way. The cam 14 is driven together with the ball set arm 7 by a motor. This drive transmission system will be explained. A geared motor 21 in which a motor and a speed reducer are integrated is fixed to the frame 8 with screws 22, and a small gear 23 is press-fitted and fixed to the D-cut-shaped output shaft 21a of the geared motor 21. Furthermore, the camshaft 24
Then, a large gear 26 having a protrusion 25 for operating the cam 14 and the ball set arm 7 is connected to the cam 14 and the large gear 26 at a dowel part, and the cam shaft 24 is connected to the large gear 26.
It is rotatably fitted to the Further, in order to position both of them, positioning in the thrust direction is performed with respect to the camshaft 24 using an E ring or the like. By installing the camshaft 24 in this way, the large gear 26 meshes with the small gear 23. Note that the arm support shaft 18 is attached so that the U-shaped frame 8 is expanded in the direction B.

A ball set arm 7 is rotatably installed on each main body cover 1B at a boss portion 50, and a ball setter 100 is attached to the ball set arm 7 with a pin on the outside of the right main body cover 1B so that the ball set arm 7 is integrated with the ball set arm 7. (not shown) or the like. Further, the ball set arm 7 is always pressed in the F direction by a set arm spring 51 at the boss portion 50 of the right main body cover 1B. Further, the other end of the ball set arm 7 to which the ball setter 100 is fixed is rotatably fitted into the boss portion 101a of the ball feeding case 101. The other end of the ball set arm 7 extends above the set and engages with the protrusion 25 of the large gear 24 during assembly. On the other hand, the right main body cover 1B and the ball feeding case 101 have a ball feeding rail 103 consisting of a plurality of inclined ribs in a direction perpendicular to the ball feeding port 3, and a stocker holding part 104 and a ball feeding port on the upper part. 105.
A damper 31 is further fixed to the frame 8 via a damper stay 30. The damper 31 is
This serves as a stopper for the pitching arm 6, and is made of an elastic material such as rubber.

The storage state of the drive mechanism section incorporated in the frame 8, etc. will be explained. The frame 8 is fixed to the left main body cover 1A with two screws 32. Left main body cover 1A
The main body right cover 1B has a dry battery box 33 formed in a part thereof and one guide rail 4, and the main body right cover 1B has a guide rail 4 and a ball feeding port 3 similar to the left main body cover 1A. These left and right body covers 1A, 1B are connected to the power switch 40.
They are fixed by sandwiching the AC adapter terminals 41 respectively.

The guide rail 4 is formed in an arc shape that substantially follows the rotational trajectory of the ball holding portion 6C of the pitching arm 6, and has a shape that gradually moves away from the rotational trajectory of the ball holding portion 6C toward the front in the pitching direction. It is becoming.

A fixed rubber foot 42 is fixed to the lower part of the main body case 1, and an adjusting rubber foot 45 is fixed via an angle adjusting fitting 43 and a pair of angle adjusting screws 44 screwed into the nut portion thereof. Angle adjustment fitting 4
3 is fixed to the main body case 1. The angle adjustment screw 44 is also threaded with a screw fixing nut 46, and by tightening it against the angle adjustment fitting 43, a double nut effect is created, and the adjustment rubber foot 45 is securely fixed. By loosening the screw fixing nut 46 and turning the angle adjustment screw 44, the setting angle of the main body case 1 with respect to the ground can be changed, and the throwing angle of the ball can be changed arbitrarily.

Operation When the power switch 40 is turned on, the geared motor 21 rotates, and the small gear 23 and large gear 26
The cam 14 rotates via. When the camshaft 24 rotates, the pitching arm 6 is moved and the ball setting arm 7 is moved by the protrusion 25 of the large gear 26.
The ball setter 100 is moved via the. Then, the stopper part of _the waiting ball _M1 sinks below the surface of the ball feed rail 102, and the forced feeding part of the waiting ball _M1 becomes the waiting ball.
In order to push M ₁ , the ball is placed on the ball feed rail 10.
3 Move up. The ball that has moved onto the ball feed rail 103 passes smoothly through the ball feed port 3 and reaches the pitching arm 6 because the ball feed rail 102 itself is composed of ribs that are perpendicular to the ball feed port 3 and inclined. The ball is moved onto the ball holding portion 6C.

On the other hand, the ball that has been set as the waiting ball _M2 passes through the ball feeding port 3 at the same time as the waiting ball _M1 is sent out by the ball setter 100, and becomes the waiting ball M2.
Although the same flow as M ₁ is attempted, after the ball setter 100 operates, the distance between the tip of the forced feeding part and the part shown as the stopper part of the waiting ball M ₂ of the ball feeding case 101 is set to be smaller than the ball diameter. Therefore, when the ball setter 100 returns to its original position by the force of the set arm spring 51, it does not move forward any further.
This ensures that the ball is set at the position of the waiting ball _M1 .

FIG. 10 shows the state of the large gear 26 and the pitching arm 6 just before the ball M is thrown. When the cam follower 16 moves away from the maximum radius of the cam 14, the energy stored in the torsion spring portion 15 of the pitching arm 6 causes the pitching arm 6 to be ejected while holding the ball at three points. The pitching arm 6, which has moved while holding the ball, suddenly stops moving when it comes into contact with the damper 31, and only the ball is thrown out with an initial velocity accelerated by the energy of the torsion coil spring section 15.

Here, the ball M is held by the guide rail 4 and the pitching arm 6 and moves together with the pitching arm 6, so that the user can see the movement of the ball M from the ball dispensing opening 2 on the front cover. Further, the trajectory Q of the ball holding portion 6C of the pitching arm 6 and the upper surface of the arc-shaped guide rail 4 are arranged to become farther apart from each other as they go diagonally upward from below, that is, in the pitching direction. Therefore, the ball M is held by both the pitching arm 6 and the guide rail 4 only in the initial stage of being thrown, and thereafter is held only by the tip of the pitching arm 6. Thereafter, the above-described operations are repeated and the balls M held in the stockers 9 and 10 are successively thrown out. The height of the thrown ball M can be easily changed by changing the amount of protrusion of the adjustable rubber feet 45 from the main body case 1, and can be adjusted to the user's requirements.

The ball is thrown out in this way,
Since a ball throwing opening 2 through which the inside of the ball is visible is provided on the front surface of the main body case 1, the batter can visually confirm the timing of throwing out the ball, making it easy to bat. In particular, as in this embodiment, a ball feeding port 3 is provided on the side surface of the main body case 1,
Additionally, by providing the guide rail 4, the batter can visually check the timing of everything from supplying the ball to the pitching arm 6 to moving the ball and throwing it out, allowing the batter to practice in a manner similar to actual toss batting practice. .

〔Effect of the invention〕

The batting practice machine of the present invention has a ball throwing opening on the front surface of the main body case that allows the inside of the ball to be seen, allowing the practitioner to visually see the action when throwing out the ball, making it easier to time the ball. Moreover,
A ball supply section is provided on the side of the main body case, and a ball guide rail is provided at the bottom of the main case, so the practitioner can visually confirm all movements from feeding the ball to the ball guide rail to throwing the ball out. , you can practice in a way similar to actual Tosbatsutetsuung practice. This has the effect of making it easier to time the blow.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of the right main body cover, FIG. 3 is a cutaway front view thereof, and FIG. 4 is a side view showing the initial state. Figure 5 is also a vertical front view of the same.
6 and 7 are respectively a side view and a plan view of the drive mechanism, FIG. 8 is a partially cutaway front view of the entire ball feeding completed state, and FIG. 9 is a side view of the same state. FIG. 10 is a side view of the ball just before it is launched. 1... Main body case, 2... Ball throwing opening,
3...Ball feeding port, 4...Guide rail,
6...Pitching arm, 6C...Ball holding part, 7...
...Ball set arm, 8...Frame, 9,1
0...Ball stocker, 11...Ball supply section,
14...Cam, 15...Torsion coil spring part, 1
8...Arm support shaft, 21...Geared motor, 2
5...Protrusion, 26...Large gear, M...Ball.

Claims (1)

[Scope of Claims] 1. A driving mechanism section and a ball throwing section are provided above and below in a main body case, and a driving mechanism section and a ball throwing section are provided in front of the ball throwing section so that the throwing operation of the ball throwing section can be controlled by the main body case. forming a ball throwing port that is visible from the front, and providing a ball supply section on a side surface of the main body case for supplying the ball to the ball throwing section;
The batting practice machine is characterized in that the main body case is divided into two parts consisting of a right cover and a left cover, and a ball guide rail for placing balls on each other is provided on the lower inner wall of each cover. 2. The batting practice machine according to claim 1, wherein the drive mechanism section is attached to the main body case via a frame. 3. The batting practice machine according to claim 1, further comprising a battery accommodating section provided behind the ball discharging section.