JPH07185056A - Pitching machine - Google Patents

Abstract

PURPOSE:To provide a pitching machine in which the motion of an arm is made closer to the motion of the arm of a human pitcher. CONSTITUTION:A pitching machine has a first arm 5 corresponding to the upper arm of a pitcher, a second arm 15 rotatably formed on the first arm 5, a second spring 18 fit straddling over the second arm and the first arm, and a hand 13 corresponding to the wrist and fingers, and the rotation of the second arm is regulated by the cooperation of a pin 16 and a pin receiver 17.

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 batting practice and the like.

[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. Reference numeral 1 is a motor for generating a rotational force, 2 is a ball to be ejected, 3 is a pair of rollers which ejects by sandwiching the ball 2, 4 is a ball which has a tip end facing between the rollers 3 and sends the ball 2 to the roller 3. It is a feeder.

In this roller type pitching machine, the roller 3 is rotated by the motor 1 in the directions of arrows A and B, and the ball 2 fed from the ball feeder 4 is sandwiched and then ejected.

FIG. 10 is a perspective view showing an apparatus called an arm type in a conventional pitching machine. Reference numeral 5 is a first arm, 6 is a speed reducer that is directly connected to the motor 1 and reduces the rotational speed of the motor 1 to amplify the rotational force, 7 is a rotating body, and 8 is a space 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, 9 is a convex portion fixed to a position away from the central axis of the rotating body 7, and 10 is fixed to penetrate through the central axis of the rotating body 7. In addition, the base end of the first arm 5 is a rotatable shaft, 11 is a cam fixed to the tip of the rotary shaft, 12 is a fourth spring having one end attached to the end of the cam 11 and pulling the cam 11. , 13 are hands which are fixed to the tip of the first arm 5 and carry the ball 2.

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 is transmitted to the rotating body 7 via the drive belt 8. With the rotation of the rotating body 7, the convex portion 9 is The arm 5 is pushed to rotate it. 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 axis of 2 crosses the axis of the rotating shaft 10 from the upper side to the lower side, the first arm 5 is pulled by the fourth spring 12 and rapidly rotates to eject the ball 2.

[0006]

Since the conventional pitching machine is constructed as described above, it has the following problems. In the case of a roller-type pitching machine, a ball is suddenly ejected from between the rollers 3, so it is difficult to set the timing of hitting as compared with a human pitching. Further, in the case of the arm type pitching machine, since the movement of the arm 5 is monotonous and has regularity, the hit timing can be easily obtained as compared with a human pitch.
Therefore, whichever method is used, the pitching form makes a movement far from the pitching motion of the human being, and thus is not suitable for the practice of timing training for actually hitting a ball thrown by a human.

The present invention has been made to solve the above problems. The arm of a conventional arm type pitching machine is divided into two parts, which are connected by a hinge corresponding to a human elbow, and the operation of the arm is made by a human. To the movement of the arm when throwing,
It is an object of the present invention to provide a pitching machine that enables closer practice to practice hitting a ball thrown by humans by making it closer.

[0008]

According to a first aspect of the present invention, there is provided a pitching machine including a rotating body having a convex portion which is rotated by an externally applied rotational power, and one end portion of which is freely rotatable. A first arm that is coaxial with the rotating body and is constrained to rotate only in one direction by the convex portion of the rotating body, and a base end portion is rotatably provided at the other end portion of the first arm and has a distal end. A second arm having a hand on which a ball is placed, a first spring that applies a rotational force to the first arm in the pitching direction, and a second arm that is provided across the first arm and the second arm A second spring that applies a rotational force in the pitching direction to the second arm, a rotation restricting portion that is attached to the second arm and that restricts the rotation of the second arm, and the rotation restricting portion. And a rotation regulating portion that regulates the rotation of the second arm. Those were example.

According to a second aspect of the present invention, the pitching machine has a rotating body having a convex portion which is rotated by a rotational power applied from the outside, and one end portion thereof is coaxial with the rotating body in a freely rotating state. A first arm that is positioned and is restrained only in one direction of rotation by the convex portion of the rotating body, and a base end is rotatably provided at the other end of the first arm and a ball is placed on the tip. A second arm having a hand; a first spring that applies a rotational force in the pitching direction to the first arm;
A second spring that is provided across the first arm and the second arm and that applies a rotational force in the pitching direction to the second arm, and is arranged parallel to the rotation surface of the second arm and is guided. A fixed plate having a portion, one end of which is rotatably provided on the second arm, and the other end of which is guided along the guide portion.
And a bar for restricting the rotation of the arm.

According to a third aspect of the present invention, a pitching machine has a rotary body having a convex portion which is rotated by a rotational power applied from the outside, and one end of which is coaxial with the rotary body in a freely rotating state. A first arm that is positioned and is constrained to rotate only in one direction by the convex portion of the rotating body, and a base end portion is rotatably provided on the other end portion of the first arm and a ball is placed on the tip end portion. A second arm having a hand; a first spring that applies a rotational 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 in the pitching direction to the second arm, and arranged in a direction perpendicular to the rotation surface of the second arm. A plate having a slit, a bar having an engaging portion capable of engaging with the slit at one end and the other end rotatably provided on the second arm, and fixed to the first arm A rotary 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. Be prepared.

According to a fourth aspect of the present invention, there is provided a pitching machine having a rotating body having a convex portion which is rotated by a rotational power applied from the outside, and one end portion of which is coaxial with the rotating body in a freely rotating state. A first arm that is positioned and is constrained to rotate only in one direction by the convex portion of the rotating body, and a base end portion is rotatably provided on the other end portion of the first arm and a ball is placed on the tip end portion. A second arm having a hand; a first spring that applies a rotational 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 in the pitching direction to the second arm, and at a target position centered on the second arm and the rotation axis. A third arm provided, a rotation restricting portion attached to the third arm for restricting rotation of the third arm, and a rotation restricting portion contacting with the rotation restricting portion to restrict rotation of the third arm. It is provided with a rotation restricting portion and a coupling member for coupling the third arm and 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 spring to follow the rotation of the second arm. In cooperation with the restriction unit, the second arm draws a trajectory that simulates the movement of the arm when a pitcher throws a ball, which cannot be done by a conventional one.

In the pitching machine according to the second aspect of the present invention, the rotation of the first arm causes the second spring to follow the rotation of the second arm, which is formed on the fixed plate during the rotation. The second arm draws a trajectory simulating the movement of the arm when the pitcher throws a ball by the bar guided by the guide portion having the specific shape.

In the pitching machine according to the third aspect of the present invention, the rotation of the first arm causes the second spring to follow the rotation of the second arm. The second arm draws a trajectory simulating the movement of the arm when the pitcher throws a ball by the cooperation of the rotating body and the engaging portion that engages with the slit of the plate.

In the pitching machine according to the fourth aspect of the present invention, the rotation of the first arm causes the second spring to follow the rotation of the second arm. During the rotation, the second arm and the second arm are rotated. The second arm simulates the movement of the arm when the pitcher throws a ball by the cooperation of the connecting member that connects the third arm and the rotation restricting portion and the rotation restricting portion provided on the third arm. Draw the trajectory that you did.

[0016]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, in which the same or corresponding parts as those in FIGS. 9 and 10 are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 14 is a first spring whose tip is attached to a spring pin 30 and pulls the first arm 5, 15 is a second arm rotatably attached to the tip of the first arm 5, and 16 is a support. First, which is a rotation restricting portion in which a base end portion is attached to a member (not shown)
Pin 17 and pin receivers 17 and 18 which are fixed parts to be rotated and fixed to the second arm 15 are provided at the tip of the first arm 5 and the second arm 15 with respect to the first arm 5.
Is a second spring for urging the ball in the pitching direction.

FIG. 2 is a principle diagram of operation in which only the drive system of the arm is extracted from FIG. The rotating body 7 is constantly rotating in the direction of arrow C at a constant rotation speed. 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 rotary shaft 10, and the convex portion 9 rotates by pushing the first arm 5. Second arm 15
Rotates following the first arm 5, but the pin receiver 17
Since the first arm 5 contacts the pin 16, the second arm 15 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. 2B. It will be in a bent state. Further, as the rotation of the rotating body 7 progresses, the pin receiver 17 is released from the pin 16, and the elastic force of the second spring 18 causes the second arm 15 to move as shown by the one-dot chain line in FIG. It rotates in the pitching direction. Simultaneously with the rotation of the second arm 15, the spring pin 30 exceeds the longest position of the first spring 14, and the elastic force of the first spring 14 causes the first arm 5 to rapidly rotate in the pitching direction to eject the ball 2. To do. In FIG. 2, the pin 16 which is a rotation restricting part restricts the rotation of the second arm 15, and the pin receiver 17 which is a rotation restricted part is attached to the second arm 15. It goes without saying that even if the second arm 15 is restricted and the pin is attached to the second arm 15, the pin has the same function.

Example 2. FIG. 3 is a perspective view showing another embodiment of the pitching machine. The same or corresponding parts as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 19 is a fixed plate fixed to the rotary shaft 10, 19a is a guide portion formed on the outer periphery of the fixed plate 19, and 20 is one end of the second arm 15
It is a bar that is rotatably provided at the other end and is slidable at the other end along the guide portion 19a.

FIG. 4 is an operation principle diagram in which only the arm drive system is extracted from FIG. The rotating body 7 is constantly rotating in the direction of arrow D at a constant rotation speed. 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 rotary shaft 10, and the convex portion 9 rotates by pushing the first arm 5. Second arm 15
Rotates following the first arm 5, but as the rotation advances, the bar 20 slides along the guide portion 19a, and the second arm 15 moves to the first arm as shown in FIG. 4 (b). The arm 5 is bent at the tip thereof. Further, as the rotation of the rotating body 7 progresses, the bar 20 slides along the guide portion 19a, the bar 20 is released from the guide portion 19a, and the elastic force of the third spring 18 causes the second arm 15 to throw. Rotate in the direction. Simultaneously with the rotation of the second arm 15, the spring pin 30 exceeds the longest position of the first spring 14, and the elastic force of the first spring 14 causes the first arm 5 to rapidly rotate in the pitching direction. )
The sphere 2 is ejected as indicated by the alternate long and short dash line.

Example 3. FIG. 5 is a perspective view showing still another embodiment of the present invention, in which the same or corresponding parts as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted. Two
1 is a rotary plate fixed to the first arm 5, 22 is a bar having one end rotatably attached to the second arm 15 and the other end having an engaging portion 22a protruding toward both sides, and 23 is a second bar. A third spring 24 for pulling the arm 15 and the bar 22 together is a stationary plate fixed to a frame or the like independent of the rotation system of the apparatus. The plate 24 has a slit 24a and an engaging portion 22a.
Are to be engaged.

FIG. 6 is an operation principle diagram in which only the arm drive system is extracted from FIG. The rotating body 7 is constantly rotating in the direction of arrow E. The first arm 5 and the rotary plate 21 share the same rotary shaft 10 as the rotary body 7, but the first arm 5 is rotatably provided with respect to the rotary shaft 10.
The convex portion 9 rotates in the same direction as the rotating body 7, and the second arm 15 also follows the first arm 5 and rotates. The bar 22 is pulled by the third spring 23 and is normally drawn to the second arm 15, but when the rotation of the rotary plate 21 proceeds, the plate 24 is pulled.
The engaging portion 22a is engaged with the first arm 5 and the second arm 15 makes an angle with respect to the first arm 5 as shown in FIG. 6 (b).
When the rotation is further advanced, the rotary plate 21 becomes the engaging portion 22a of the bar 22.
The bar 22 from the slit 24a of the plate 24 to the outside.
Is released from the slit 24a, and the elastic force of the second spring 18 causes the second arm 15 to rotate in the pitching direction. Second
At the same time that the arm 15 rotates, the spring pin 30 exceeds the longest position of the first spring 14, and the elastic force of the first spring 14 causes the first arm 5 to rapidly rotate in the pitching direction, as shown in FIG. The sphere 2 is ejected as indicated by the chain line.

Example 4. FIG. 7 is a perspective view of a pitching machine showing still another embodiment of the present invention.
3 to 3, the same or corresponding parts are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 25 denotes a third arm attached to the target position of the second arm 15 about the rotary shaft 10, and 26
Is a coupling member that connects the end of the second arm 15 and the end of the third arm 25.

FIG. 8 is an operation principle diagram in which only the arm drive system is extracted from FIG. The rotating body 7 is always rotating in the direction of arrow F. The first arm 5 shares the same rotating shaft 10 as the rotating body 7, but the first arm 5 does not rotate.
It is provided rotatably with respect to, and is rotated in the same direction as the rotating body 7 by the convex portion 9, and the second arm 15 and the third arm 25 are also rotated following the first arm 5. Third
When the rotation of the arm 25 of FIG.
The angle is as shown in (b). Along with this, the second arm 15 is pulled by the connecting member 26 and forms an angle with the first arm 5 as shown in FIG. When the rotation further advances, the pin receiver 17 is released from the pin 16, and the elastic force of the second spring 18 causes the second arm 15 to rotate in the pitching direction as shown by the alternate long and short dash line in FIG. 8B. . At this time, the third arm 25 is pulled by the second arm 15 via the connecting member 26, and returns to the original state as shown by the alternate long and short dash line in FIG. 8B. At the same time, the spring pin 30 moves the first spring 14
Beyond the longest position of the
The arm 5 rotates rapidly in the pitching direction and ejects the ball 2.
In FIG. 8, the pin 16 which is the rotation restricting portion controls the movement of the second arm 15, and the pin receiver 1 which is the rotation restricted portion is controlled.
7 is attached to the third arm 25, the pin receiver controls the second arm 15, and the pin is 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, the rotation restricting portion and the rotation restricted portion cooperate with each other during the rotation of the second arm. The second arm can draw a trajectory that imitates the movement of the arm when the pitcher throws a ball, and has the effect of allowing the batter to train the timing of hitting a 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 guide portion of the specific shape formed on the fixed plate.

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

Further, according to the pitching machine of the fourth aspect, the coupling member for connecting the second arm and the third arm, the rotation restricting portion and the rotation restricted provided on the third arm. The same effect as that of claim 1 can be obtained by cooperation with the section.

[Brief description of drawings]

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

FIG. 2 is a plan view showing the operating principle of the first embodiment of the present invention.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a plan view showing the operating principle of the second embodiment of the present invention.

FIG. 5 is a perspective view showing a third embodiment of the present invention.

FIG. 6 is a plan view showing the operating principle of the third embodiment of the present invention.

FIG. 7 is a perspective view showing a fourth embodiment of the present invention.

FIG. 8 is a plan view showing the operating principle of the fourth embodiment 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 1st arm 7 Rotating body 9 Convex part 13 Hand 14 1st spring 15 2nd arm 16 Pin (rotation control part) 17 Pin receiving (rotation controlled part) 18 2nd spring 19 Fixing plate 19a Track part 20 bar 21 rotating plate 22 bar 22a engaging part 23 third spring 24 plate 24a slit 25 third arm 26 coupling member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Tajika 730 Kamimachiya, Kamakura City, Kanagawa Mitsubishi Electric Engineering Co., Ltd. Kamakura Office

Claims (4)

[Claims] 1. A rotating body having a convex portion which is rotated by a rotational power given from the outside, and one end of which is coaxial with the rotating body in a freely rotating state and which is unidirectional by the convex portion of the rotating body. A first arm that is constrained only to the rotation of the first arm, a second arm that has a base end rotatably provided at the other end of the first arm, and has a hand on which a ball is placed at the tip end; The first to give the rotation force in the pitching direction to the first arm
Of the second arm, a second spring provided across the first arm and the second arm to apply a rotational force in the pitching direction to the second arm, and a second spring attached to the second arm. A pitching machine comprising: a rotation restricting portion for restricting rotation of an arm; and a rotation restricting portion that abuts on the rotation restricting portion and restricts rotation of the second arm. 2. A rotating body having a convex portion which is rotated by a rotational power given from the outside, and one end of which is coaxial with the rotating body in a freely rotating state and which is unidirectional by the convex portion of the rotating body. A first arm that is restrained only by the rotation of the first arm, a second arm that has a base end rotatably provided at the other end of the first arm, and has a hand on which a ball is placed at the tip end; The first to give the rotation force in the pitching direction to the first arm
In parallel with the rotation surface of the second arm, and a second spring provided across the first arm and the second arm to apply a rotation force in the pitching direction to the second arm. A fixed plate provided with a guide portion, and a bar having one end rotatably provided on the second arm and the other end guided along the guide portion to restrict rotation of the second arm. A pitching machine characterized by being equipped. 3. A rotating body having a convex portion which is rotated by a rotational power given from the outside, and one end of which is coaxial with the rotating body in a freely rotating state and which is unidirectional by the convex portion of the rotating body. A first arm that is constrained only to the rotation of the first arm, a second arm that has a base end rotatably provided at the other end of the first arm, and has a hand on which a ball is placed at the tip end; The first to give the rotation force in the pitching direction to the first arm
With respect to the rotation surface of the second arm, and a second spring provided across the first arm and the second arm to apply a rotational force in the pitching direction to the second arm. A plate that is vertically arranged and has a slit; a bar that has an engaging portion that is engageable with the slit at one end and that the other end is rotatably provided on the second arm; A rotary plate that is fixed to the arm of the second arm and that disengages the engagement portion from the slit, and a third plate that is provided between the bar and the second arm and that pulls the bar toward the second arm. Pitching machine characterized by having a spring. 4. A rotating body having a convex portion which is rotated by a rotational power given from the outside, and one end of which is coaxial with the rotating body in a freely rotating state and which is unidirectional by the convex portion of the rotating body. A first arm that is constrained only to the rotation of the first arm, a second arm that has a base end rotatably provided at the other end of the first arm, and has a hand on which a ball is placed at the tip end; The first to give the rotation 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. The third arm provided at the target position, the rotation restricting portion that is attached to the third arm and restricts the rotation of the third arm, and the third arm that contacts the rotation restricting portion. A pitching machine comprising: a rotation restricting portion that restricts rotation; and a coupling member that connects the third arm and the second arm.