JP2648284B2 - Pitching machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pitching machine used for baseball hitting practice.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view showing an apparatus called a roller type in a conventional pitching machine. 1 is a motor that generates a rotational force, 2 is a ball to be ejected, 3 is a pair of rollers that sandwich and ejects the ball 2, 4 is a ball whose tip faces the roller 3 and sends the ball 2 to the roller 3 It is a feeder.

In this roller-type pitching machine, a roller 3 is rotated in the directions of arrows A and B by a motor 1 to eject a sphere 2 fed from a sphere feeder 4 after being sandwiched.

FIG. 10 is a perspective view showing a device called an arm type in a conventional pitching machine. 5 is a first arm, 6 is a speed reducer directly connected to the motor 1 to reduce the rotational speed of the motor 1 and amplify the rotational force, 7 is a rotating body, and 8 is a winding between the speed reducer 6 and the rotating body 7. A drive belt for transmitting the rotational force of the speed reducer 6 to the rotating body 7, a convex portion 9 fixed at a position away from the central axis of the rotating body 7, A rotating shaft to which the base end of the first arm 5 is fixed, 11 is a cam fixed to the distal end of the rotating shaft 10, and 12 is a fourth end which is attached to one end of the cam 11 and pulls the cam 11. The spring 13 is a hand fixed to the tip of the first arm 5 and on which the ball 2 is placed.

Next, the operation of the arm type pitching machine shown in FIG. 10 will be described. The rotational force generated by the motor 1 is reduced in rotational speed by the speed reducer 6 to amplify the rotational force and transmitted to the rotating body 7 via the drive belt 8. The arm 5 is pushed to rotate. The angle of the first arm 5 shown in FIG. 10 is substantially perpendicular to the ground, but at this time, the fourth spring 12 is in the most extended state, and the fourth spring 1
When the second axis exceeds the axis of the rotating shaft 10 from above to below, the first arm 5 is pulled by the fourth spring 12, rotates rapidly, and ejects the ball 2.

[0006]

Since the conventional pitching machine is configured as described above, there are the following problems. In the case of a roller-type pitching machine, since a ball is immediately ejected from between the rollers 3, it is difficult to take the timing of the impact as compared with a human pitch. Further, in the case of the arm-type pitching machine, the movement of the arm 5 is monotonous and regular, so that the timing of hitting can be easily obtained as compared with a human pitching.
Therefore, in either case, since the pitching form makes a movement far from the pitching motion of a human, it is not suitable for the practice of training the timing of actually hitting a ball thrown by a human.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The arm of a conventional arm-type pitching machine is divided into two parts, connected by hinges corresponding to human elbows, and the operation of the arm is performed by a human. For the movement of the arm when throwing,
It is an object of the present invention to provide a pitching machine that enables closer exercise to practice hitting a ball thrown by a human by making the exercise closer.

[0008]

According to a first aspect of the present invention, there is provided a pitching machine comprising: a rotating body having a convex portion which is rotated by rotational power given from the outside; A first arm that is coaxial with the rotator and is constrained to rotate only in one direction by a protrusion of the rotator; and a base end rotatably provided at the other end of the first arm. A second arm having a hand on which a ball is placed, a first spring for applying a turning force to the first arm in a pitching direction, and a straddle provided between the first arm and the second arm A second spring for applying a rotational force to the second arm in the pitching direction, a rotation-regulated portion attached to the second arm and restricting rotation of the second arm, and a rotation-regulated portion. A rotation restricting portion that contacts and restricts rotation of the second arm. Those were example.

According to a second aspect of the present invention, there is provided a pitching machine comprising: a rotating body having a convex portion which is rotated by externally applied rotating power; and one end coaxial with the rotating body in a freely rotating state. A first arm positioned and restricted only in one direction by the protrusion of the rotating body; a base end rotatably provided at the other end of the first arm and a ball mounted on the tip end A second arm having a hand, a first spring for applying a rotational force to the first arm in a pitching direction,
A second spring provided across the first arm and the second arm to apply a rotational force to the second arm in a pitching direction; and a track disposed parallel to a rotation surface of the second arm. a fixing plate having a part <br/>, second end is guided the other end portion provided rotatably in the second arm along the track portion
And a bar for restricting rotation of the arm.

According to a third aspect of the present invention, there is provided a pitching machine comprising: a rotating body having a convex portion which is rotated by rotational power given from the outside; and one end coaxial with the rotating body in a freely rotating state. A first arm positioned and restricted only in one direction by the protrusion of the rotating body; a base end rotatably provided at the other end of the first arm and a ball mounted on the tip end A second arm having a hand, a first spring for applying a rotational force to the first arm in a pitching direction,
A second spring that is provided across the first arm and the second arm and applies a rotational force to the second arm in a pitching direction; and a second spring that is arranged perpendicular to a rotation surface of the second arm. A plate having a slit provided at one end thereof, a bar having an engagement portion engageable with the slit at one end, and the other end rotatably provided at the second arm, and fixed to the first arm. A rotating plate for releasing the engagement between the engaging portion and the slit, and a third spring provided between the bar and the second arm for pulling the bar toward the second arm. It is provided.

According to a fourth aspect of the present invention, there is provided a pitching machine comprising: a rotating body having a convex portion and rotating about a rotating shaft by a rotating power supplied from the outside ;
A first arm intermediate section is restrained only in rotation in one direction by the convex portion of the rotatably provided above the rotating body, the base end portion to one end of the first arm rotatably provided A second arm having a hand on which a ball can be placed at the tip;
A first spring that applies a rotational force in the pitching direction to the first arm; and a second spring that is provided across the first arm and the second arm and applies a rotational force in the pitching direction to the second arm.
And the base end is rotatable at the other end of the first arm.
And a third arm provided at the end of the third arm .
A rotation-regulated portion attached to an end of the third arm, the rotation of the third arm being restricted; a rotation-regulating portion in contact with the rotation-regulated portion to restrict the rotation of the third arm; A coupling member for coupling the second arm.

[0012]

In the pitching machine according to the first aspect of the present invention, the rotation of the first arm causes the second arm to follow the rotation of the second spring by the rotation of the first arm. In cooperation with the regulating unit, the second arm follows a trajectory that simulates the movement of the arm when a pitcher throws a ball, which could not be achieved by a conventional one.

In the pitching machine according to the second aspect of the present invention, the second arm follows the rotation by the second spring due to the rotation of the first arm, but is formed on the fixed plate during the rotation. The second arm follows a trajectory simulating the movement of the arm when the pitcher throws a ball, by means of a bar guided by a track of specific shape.

In the pitching machine according to the third aspect of the present invention, the rotation of the first arm causes the second arm to follow the rotation of the second spring by the rotation of the first arm. Engagement part which engages with slit of plate, rotation
In cooperation with the board , the second arm follows a trajectory simulating the movement of the arm when the pitcher throws a ball.

In the pitching machine according to the fourth aspect of the present invention, the rotation of the first arm causes the second arm to follow the rotation of the second spring by the rotation of the second spring. The second arm simulates the movement of the arm when the pitcher throws a ball by the cooperation of the coupling member connecting the third arm and the rotation restricting portion and the rotation restricted portion provided on the third arm. Trajectory drawn.

[0016]

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of the present invention. The same or corresponding parts as those in FIGS. 9 and 10 are denoted by the same reference numerals, and description thereof will be omitted. In the drawing, reference numeral 14 denotes a tip of a spring pin 30.
A first spring attached to the first arm 5 and pulling the first arm 5;
Reference numeral 15 denotes a second arm rotatably attached to the distal end of the first arm 5, reference numeral 16 denotes a first pin which is a rotation restricting portion having a base end attached to a support member (not shown), and 17
A pin receiver 18, which is a rotation-regulated portion fixed to the second arm 15, is provided at the distal end of the first arm 5 and urges the second arm 15 against the first arm 5 in the pitching direction. A second spring.

FIG. 2 is an operation principle diagram in which only the drive system of the arm is extracted from FIG. The rotating body 7 is constantly rotating at a constant rotation speed in the direction of arrow C. The first arm 5 shares the same rotation axis 10 as the rotating body 7, but the first arm 5
Is rotatable with respect to the rotating shaft 10, and is rotated by the protrusion 9 pressing the first arm 5. Second arm 15
Rotates following the first arm 5, but the pin receiver 17 rotates.
Abuts on the pin 16 and cannot follow the first arm 5 thereafter, and the second arm 15 is folded at the tip of the first arm 5 as shown in FIG. It will be in a bent state. Further, as the rotation of the rotating body 7 proceeds, the pin receiver 17 is released from the pin 16 and the second arm 15 is moved by the resiliency of the second spring 18 as shown by the dashed line in FIG. Rotate in the pitching direction. At the same time as the rotation of the second arm 15, the spring pin 30 exceeds the longest position of the first spring 14, and the first arm 5 is rapidly rotated in the pitching direction by the resilience of the first spring 14 to eject the ball 2. I do. In FIG. 2, a pin 16 as a rotation restricting portion restricts rotation of the second arm 15, and a pin receiver 17 as a rotation-regulated portion is attached to the second arm 15. It goes without saying that even if the second arm 15 is restricted and a pin is attached to the second arm 15, the same function is provided.

Embodiment 2 FIG. FIG. 3 is a perspective view showing another embodiment of the pitching machine, and the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals.
The description is omitted. Reference numeral 19 denotes a fixed plate whose center is fixed to a support member (not shown), 19a denotes a track formed on the outer peripheral portion of the fixed plate 19, and 20 denotes one end rotatably provided on the second arm 15. , A bar slidable along the other end along the track portion 19a.

FIG. 4 is an operation principle diagram in which only the drive system of the arm is extracted from FIG. The rotating body 7 is always rotating at a constant rotation speed in the direction of arrow D. The first arm 5 shares the same rotation axis 10 as the rotating body 7, but the first arm 5
Is rotatable with respect to the rotating shaft 10, and is rotated by the protrusion 9 pressing the first arm 5. Second arm 15
Rotates following the first arm 5, but as the rotation advances, the bar 20 slides along the track portion 19a, and the second arm 15 moves to the first position as shown in FIG. The arm 5 is bent at the tip. Further, when the rotation of the rotating body 7 proceeds, the bar 20 slides along the track portion 19a, the bar 20 is released from the track portion 19a, and the second arm 15 is thrown by the elastic force of the second spring 18. Rotate in the direction. At the same time as the rotation of the second arm 15, the spring pin 30 exceeds the longest position of the first spring 14, and the first arm 5 rapidly rotates in the pitching direction by the resilience of the first spring 14, and FIG. )
The sphere 2 is ejected as shown by the alternate long and short dash line.

Embodiment 3 FIG. FIG. 5 is a perspective view showing still another embodiment of the present invention, in which the same or corresponding parts as those in Embodiments 1 and 2 are denoted by the same reference numerals, and the description thereof will be omitted. Reference numeral 21 denotes a rotating plate fixed to the first arm 5, and reference numeral 22 denotes an engagement portion 22 having one end rotatably mounted on the second arm 15 and the other end protruding on both sides.
a is a third spring that draws the second arm 15 and the bar 22, and 24 is an immovable plate fixed to a frame or the like independent of the rotation system of the device.
The engaging portion 22a engages with the slit 24a.

FIG. 6 is an operation principle diagram in which only the drive system of the arm is extracted from FIG. The rotating body 7 is always rotating in the direction of the arrow E. The first arm 5 and the rotating plate 21 share the same rotating shaft 10 as the rotating body 7, but the first arm 5 is provided rotatably with respect to the rotating shaft 10,
The projection 9 rotates in the same direction as the rotating body 7, and the second arm 15 also rotates following the first arm 5. The bar 22 is pulled by the third spring 23 and is normally drawn to the second arm 15.
The engaging portion 22a is engaged with the first arm 5 so that the second arm 15 forms an angle with the first arm 5 as shown in FIG.
When the rotation further proceeds, the rotating plate 21 is engaged with the engaging portion 22a of the bar 22.
Is pushed out of the slit 24a of the plate 24,
Is released from the slit 24a, and the second arm 15 rotates in the pitching direction by the elastic force of the second spring 18. Second
At the same time as the rotation of the arm 15, the spring pin 30 moves beyond the longest position of the first spring 14, and the first arm 5 rapidly rotates in the pitching direction by the resilience of the first spring 14, as shown in FIG. The sphere 2 is ejected as indicated by the dashed line.

Embodiment 4 FIG. FIG. 7 is a perspective view of a pitching machine showing still another embodiment of the present invention. The same or corresponding parts as those in Embodiments 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 25 denotes a third arm attached to a target position of the second arm 15 about the rotation shaft 10, and reference numeral 26 denotes a connecting member that connects an end of the second arm 15 and an end of the third arm 25. It is.

FIG. 8 is an operation principle diagram in which only the drive system of the arm is extracted from FIG. The rotating body 7 is always rotating in the direction of arrow F. Although the first arm 5 shares the same rotation axis 10 as the rotating body 7, the first arm 5
The second arm 15 and the third arm 25 follow the first arm 5 and rotate in the same direction as the rotating body 7 by the protrusion 9. Third
As the rotation of the arm 25 proceeds, the pin receiver 17 as the rotation-regulated portion comes into contact with the pin 16 as the rotation-regulated portion, so that the third arm 25 moves relative to the first arm 5 in FIG.
The angle is as shown in FIG. Accordingly, the second arm 15 is pulled by the coupling member 26 and forms an angle with the first arm 5 as shown in FIG. As the rotation further proceeds, the pin receiver 17 is released from the pin 16, and the second arm 15 rotates in the pitching direction as shown by the one-dot chain line in FIG. . At this time, the third arm 25 is pulled by the second arm 15 via the coupling member 26, and returns to the original state as shown by the dashed line in FIG. 8B. At the same time, the spring pin 30 is
Over the longest position of the first spring 14 and the first spring 14
Arm 5 rapidly rotates in the pitching direction to eject the ball 2.
In FIG. 8, a pin 16 serving as a rotation restricting unit controls the movement of the second arm 15, and a pin receiver 1 serving as a rotation restricted unit is provided.
7 is attached to the third arm 25, but the pin receiver controls the second arm 15 and the pin is connected to the third arm 2.
Needless to say, even if it is attached to 5, it has the same function.

[0024]

As described above, according to the pitching machine of the first aspect of the present invention, during the rotation of the second arm, the rotation regulating portion and the rotation regulating portion cooperate with each other. The second arm can draw a trajectory simulating the movement of the arm when the pitcher throws the ball, and has the effect that the batter can train the timing of hitting the ball thrown by a human.

According to the pitching machine of the second aspect, the same effect as that of the first aspect can be obtained by the bar guided by the track having a specific shape formed on the fixed plate.

According to the pitching machine of the third aspect, the same effect as in the first aspect is obtained by the cooperation of the rotating body and the engaging portion which engages with the slit of the plate at the end of the bar. Can be obtained.

According to the pitching machine of the fourth aspect, a connecting member for connecting the second arm and the third arm, a rotation restricting portion provided on the third arm, and a rotation-regulated member. The same effect as the first aspect can be obtained by cooperation with the section.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a plan view showing the operation principle of Embodiment 1 of the present invention.

FIG. 3 is a perspective view showing Embodiment 2 of the present invention.

FIG. 4 is a plan view showing the operation principle of Embodiment 2 of the present invention.

FIG. 5 is a perspective view showing Embodiment 3 of the present invention.

FIG. 6 is a plan view showing the operation principle of Embodiment 3 of the present invention.

FIG. 7 is a perspective view showing Embodiment 4 of the present invention.

FIG. 8 is a plan view showing the operation principle of Embodiment 4 of the present invention.

FIG. 9 is a perspective view showing a conventional roller-type pitching machine.

FIG. 10 is a perspective view showing a conventional arm type pitching machine.

[Explanation of symbols]

 5 First arm 7 Rotating body 9 Convex part 13 Hand 14 First spring 15 Second arm 16 Pin (rotation restriction part) 17 Pin receiver (Rotation restricted part) 18 Second spring 19 Fixed plate 19a Track part Reference Signs List 20 bar 21 rotating plate 22 bar 22a engaging portion 23 third spring 24 plate 24a slit 25 third arm 26 connecting member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Isamu Nishikido 730 Kamimachiya, Kamakura-shi, Kanagawa Mitsubishi Electric Engineering Co., Ltd. Kamakura Office

Claims (4)

(57) [Claims] 1. A rotating body having a convex portion that is rotated by externally applied rotational power, and one end is coaxially located with the rotating body in a freely rotating state, and one end is formed by the convex portion of the rotating body. A second arm having a hand on which a base end is rotatably provided at the other end of the first arm and a ball is placed at the tip end; and The first to give a turning force in the pitching direction to the first arm
A second spring provided across the first arm and the second arm to apply a rotational force to the second arm in the pitching direction; and a second spring attached to the second arm. A pitching machine comprising: a rotation-regulated portion that restricts rotation of an arm; and a rotation restriction portion that abuts the rotation-regulated portion and restricts rotation of the second arm. 2. A rotating body having a convex portion which is rotated by rotational power given from the outside, and one end positioned coaxially with the rotating body in a freely rotating state, and one direction is defined by the convex portion of the rotating body. A second arm having a hand on which a base end is rotatable at the other end of the first arm and a ball is placed at the distal end; The first to give a turning force in the pitching direction to the first arm
A second spring provided across the first arm and the second arm to apply a rotational force to the second arm in the pitching direction, and a spring parallel to the rotation surface of the second arm. A fixed plate provided with a track portion and a bar having one end portion rotatably provided on the second arm and the other end portion guided along the track portion to regulate rotation of the second arm; A pitching machine comprising: 3. A rotating body having a convex portion which is rotated by rotational power given from the outside, and one end positioned coaxially with the rotating body in a freely rotating state, and in one direction by the convex portion of the rotating body. A second arm having a hand on which a base end is rotatably provided at the other end of the first arm and a ball is placed at the tip end; and The first to give a turning force in the pitching direction to the first arm
A second spring, which is provided over the first arm and the second arm and applies a rotational force in the pitching direction to the second arm; and a second spring with respect to the rotation surface of the second arm. A plate having a slit disposed in a vertical direction, a bar having an engaging portion at one end thereof and capable of engaging with the slit, and a second end rotatably provided on the second arm; A rotating plate fixed to the arm and releasing the engagement between the engaging portion and the slit; and a third plate provided between the bar and the second arm for pulling the bar toward the second arm. A pitching machine comprising: a spring; 4. A rotary body rotating around the rotation shaft by the rotational power applied from the outside and having a convex portion, the upper
A first arm intermediate portion is constrained only rotation in one direction to the convex portion of the rotatably provided above the rotating body to the serial rotary shaft, a base end rotatably to one end of the first arm A second arm having a hand on the tip of which a ball is placed, a first spring for applying a rotational force to the first arm in a pitching direction, the first arm and the second arm, A second spring, which is provided over the second arm and applies a rotational force to the second arm in the pitching direction; and a base end portion at the other end of the first arm.
A rotatable third arm, a rotation-regulated portion attached to the tip of the third arm, the rotation of the third arm being restricted, and the third arm abutting against the rotation-regulated portion. A rotation restricting portion for restricting rotation of the third arm;
A pitching machine comprising: a first arm and a coupling member that connects the second arm to the second arm.