JP2001252387A - Pitching device for baseball - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arm type pitching device for baseball, with which balls are powerful. SOLUTION: The pitching device 1 for baseball, in which a ball placed on a ball receiving part 15 is thrown forward by rotating an arm 2 for pitching provided with the ball receiving part 15 for placing the ball for pitching on the top end, is provided with a rotating means 11 for rotating the ball on the top end of the arm 2 for pitching.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a so-called arm-type baseball pitching apparatus.

[0002]

2. Description of the Related Art Conventionally, as a baseball pitching machine (pitching machine), a roller-type pitching machine dedicated to a curve for throwing a ball by passing the ball between a plurality of rotating rollers, and an actual pitcher throwing the ball. As described above, there is a pitching machine of an arm type exclusively for a straight ball which throws a ball placed on a ball receiving portion forward by rotating a pitching arm provided with a ball receiving portion for placing a ball for throwing at the tip.

Conventionally, an arm-type pitching machine 50
As shown in FIG. 7, a pitching arm 51 provided with a ball receiving portion 51a for placing a ball for pitching on the tip thereof, a rotating shaft 52 that rotates integrally with the pitching arm 51, and a rotating shaft 52
Sprocket 53 for rotating the pitching arm 51 around the chain, a chain belt 56, a driving sprocket 57
54 that drives the driven sprocket 53 through the
And a spring 55 for urging the pitching arm 51 in one direction via the rotation shaft 52 in a part of an angular range around the rotation shaft 52. The pitching arm 51 is rotated by the driven sprocket 53, and the pitching arm 51 is rotated by the biasing force of the spring in the partial angle range.
Is rotated at a high speed, the ball receiving portion 51 of the pitching arm 51 is rotated.
The ball placed on a is thrown toward the front target position by the centrifugal force of the pitching arm 51.

[0004]

However, this arm-type pitching machine has a problem that the ball does not have the elongation that the pitcher actually throws because the rotating force (spin) is not applied much to the thrown ball. There is.

Accordingly, an object of the present invention is to provide an arm-type baseball pitching apparatus in which a ball has elongation.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a ball receiving unit provided with a ball receiving unit provided with a ball receiving unit at a tip thereof. A ball throwing device for baseball wherein a thrown ball is thrown forward, wherein a rotating means for rotating the ball is provided at a tip of the arm for throwing ball.

As described above, according to the present invention, since the rotating means for rotating the ball is provided at the tip of the ball throwing arm, the ball thrown from the ball throwing arm is sufficiently rotated. And can throw out a stretchy ball.

[0008] In the present invention, it is preferable that the rotating means includes a roller for rotating the ball by rotating. Then, by making the plane on which the roller rotates parallel to the plane on which the throwing arm rotates,
A stretched straight can be thrown, and the plane on which the roller rotates has a predetermined angle with respect to the plane on which the throwing arm rotates, so that the shot ball or the slider rotates And a shoot or a slider can be thrown.

Further, by rotating the roller in a direction opposite to the rotation direction of the pitching arm, a spin can be applied to the ball, and a ball with elongation can be thrown. Conversely, by rotating the roller in the same direction as the rotation direction of the throwing arm, a reverse spin can be applied to the ball and a falling curve (drop)
Can be thrown.

[0010] In the present invention, the rotating means is loosely fitted to the rotating shaft of the pitching arm, is formed in a disk shape centered on the same axis, and is fixed to a mount supporting the rotating shaft. A pulley, a driven pulley rotatably attached to the pitching arm, a first pulley that rotates integrally with the driven pulley, a second pulley that rotates integrally with the roller, and the fixed pulley And a first belt stretched between the driven pulleys, and a second belt stretched between the first pulley and the second pulley.

According to the present invention, when the throwing arm is rotated, the driven pulley moves on a circle centered on the rotation axis. At this time, the first belt is provided between the driven pulley and the fixed pulley. Is stretched, and the fixed pulley is fixed to the gantry, so that the driven pulley moves while rotating in the direction opposite to the pitching arm. When the driven pulley rotates, the first pulley integrated therewith rotates, and then the second pulley rotates.
The second pulley rotates through the belt, and rotates a roller integrated therewith.

In the present invention, the fixed pulley and the driven pulley are preferably a fixed sprocket and a driven sprocket, and in that case, the first belt is preferably a belt chain. In the present invention,
By making the diameter of the fixed pulley larger than the diameter of the driven pulley, the driven pulley can be rotated faster than the pitching arm, and the roller can be rotated faster with it. Can be.

Further, by rolling the second belt, the roller can be rotated in the same direction as the throwing arm, so that a spin can be applied to the thrown ball and the stretched ball is thrown out. be able to.

[0014] In the baseball pitching apparatus according to the present invention, it is preferable that a brake plate for absorbing vibration of the rotary shaft is provided on a rotating shaft of the pitching arm. It is preferable that the holding member is sandwiched by a pair of holding plates integral with the shaft via a friction plate having a high friction coefficient. By providing the braking plate in this manner, the vibration transmitted from the pitching arm to the rotating shaft after the ball separates is absorbed by the braking plate, so that the vibration transmitted from the pitching arm to the baseball pitching apparatus body can be reduced. it can. Therefore,
The baseball pitching device does not move due to the vibration of the pitching arm, and it is possible to prevent the control of the ball from being inaccurate by overlapping the pitches.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a baseball pitching machine (pitching machine) according to the present invention will be described with reference to the drawings. FIG. 1 is a partially sectional front view of the pitching machine according to the present embodiment. The pitching machine 1 according to the present embodiment includes a pitching arm 2 provided with a ball receiving portion on which a ball for pitching is mounted at a tip, a rotary shaft 3 that rotates integrally with the pitching arm 2, and a rotary shaft mainly. Stand 4 supporting 3
A first driven sprocket 5 that rotates the pitching arm 2 by rotating about the rotation shaft 3, a motor 6 that drives the first driven sprocket 5,
A spring 7 for urging the pitching arm 2 in one direction via the rotation shaft 3 in a part of the angle range, and a disc-like shape which is loosely fitted to the rotation shaft 3 of the pitching arm 2 and has the same axis as the center. And a fixed sprocket 8 fixed to the gantry 4.

The rotating shaft 3 is supported on a gantry 4. The rotating shaft 3 is provided with a fixed sprocket 8, a pitching arm 2, a first driven sprocket 5, and a spring 7 in this order from the left in FIG.

As shown in FIGS. 1 and 2, the pitching arm 2 has a base end 13 fixed to the rotating shaft 3, an arm 14 extending outward from the base 13, and a tip of the arm 14. And a ball receiving unit 15 for placing a ball X for pitching,
It has. A stopper 13a protrudes from the base portion 13 on the side of the first driven sprocket 5 on the arm portion 14 side. One end of the ball receiving portion 15 is formed in a short V-shape, and a roller 11 is rotatably provided at a tip of the ball throwing arm 2 on an extension of the ball receiving portion 15. A second driven sprocket 9 is rotatably provided on the same plane as the fixed sprocket 8 on the base end side of the ball receiving portion 15, and a second driven sprocket 9 is provided outside the second driven sprocket 9. A first V pulley 10 that rotates integrally with the first V pulley 10 is provided. The second driven sprocket 9 is formed so that its diameter is about 1 / N of the diameter of the fixed sprocket 8. A second V pulley 12 that rotates integrally with the roller 11 is provided on the same plane as the first V pulley 10 outside the roller 11.

A chain belt 16 is stretched between the fixed sprocket 8 and the second driven sprocket. Accordingly, when the pitching arm 2 rotates, the second driven sprocket 9 moves on a circle centered on the rotating shaft 3 accordingly. At this time, since the fixed sprocket 8 is fixed to the gantry 4, The driven sprocket 8 rotates in a direction opposite to the rotation direction of the pitching arm 2. Also, the second
Since the diameter of the driven sprocket 9 is 1 / N of the diameter of the fixed sprocket 8, the second driven sprocket 8 rotates at a rotation speed N times the rotation speed of the pitching arm 2.

As shown in FIGS. 2 and 3, a V-belt 17 is stretched between the first V-pulley 10 and the second V-pulley 12 so as to be stretched. Therefore, when the first V pulley 10 rotates with the rotation of the second driven sprocket 8, the second V pulley 12 rotates in the opposite direction to the first V pulley 10.

The first driven sprocket 5 is freely rotatably fitted on the rotating shaft 3. On the side of the pitching arm 2 of the first driven sprocket 5, a projection 5a is provided which abuts on a stopper 13a provided on the base end portion 13 of the pitching arm 2, and the first driven sprocket 5 rotates to project the projection 5a. By pressing the stopper 13a, the pitching arm 2 can be rotated. Also, the first
A chain belt 19 is stretched between the driven sprocket 5 and a disk-shaped drive pulley 18 attached to the rotating shaft 6a of the motor 6, and is configured to rotate in conjunction with the drive pulley 18.

One end of the spring 7 is connected to the gantry 4 as shown in FIG.
The other end is fixed to a spring connector 21 fixed to a portion 3a of the rotating shaft 3 protruding from the gantry 4. Spring connector 21
Is formed in a rectangular shape with rounded corners, one end of which is fixed to the rotating shaft 3, and the other end of which is rotatably attached to a spring 7.
1 is urged upward in FIG.

The gantry 4 of the rotating shaft 3 and the spring connecting member 21
Between them, a brake plate 22 formed in a disk shape is provided. The brake plate 22 is formed to have a large thickness in the vicinity of the outer periphery, and is fixed to the rotating shaft 3 by a pair of pressing plates 23 via a friction plate 24 having a high friction coefficient. For this reason,
When vibration is applied to the rotating shaft 3 from the pitching arm 2,
The braking plate 22 resonates and absorbs vibration of the rotating shaft.

Next, the operation of the arm type pitching machine according to this embodiment will be described. First, the drive pulley 18
Is rotated in the direction of arrow A in FIG. When the drive pulley 18 rotates in the direction of arrow A,
In conjunction with this, the first driven sprocket 5 rotates in the same direction. At this time, since the stopper 13a of the base end portion 13 of the pitching arm 2 is pushed by the projecting portion 5a of the first driven sprocket 5, the pitching arm 2 is moved by the first driven sprocket 5
, The rotation shaft 3 also rotates in the same direction (the direction of arrow B). When the rotating shaft 3 rotates,
Accordingly, the spring connector 21 also rotates against the urging force of the spring 7. When the pitching arm 2 rotates, the fixed sprocket 8 is fixed to the gantry, and the second driven sprocket 9 moves on a circle around the rotation shaft 3 integrally with the pitching arm 2. Therefore, the second driven sprocket 9 rotates in the direction opposite to the pitching arm 2 (the direction of arrow C) as shown in FIG. When the second driven sprocket 9 rotates, the first V pulley 10 integrated therewith rotates in the same direction as the second driven sprocket 9, and in conjunction with this, the second V pulley 12 is opposed to the second driven sprocket 9. The roller 11 rotates in the same direction as the pitching arm 2 (direction of the arrow D), that is, the roller 11 integrated therewith also rotates in the same direction as the pitching arm 2. At this time, the diameter of the second driven sprocket 9 is N
The roller 11 rotates at N times the speed of the pitching arm 2 because it is one-half.

When the spring connecting member 21 rotates and the side of the spring connecting member 21 to which the spring 7 is connected passes the lowest point, that is, when the tip of the pitching arm 2 passes the highest position, The pitching arm 2 that has been rotating at the same speed as the first driven sprocket 5 rotates at a higher speed than the first driven sprocket 5 due to the urging force of the spring 7, and the ball receiving portion 15 at the tip of the pitching arm 2 The placed ball X is thrown forward by the centrifugal force of the throwing arm. In other words, when the pitching arm 2 is rotating in the range of α in FIG. 2, it is rotating at the same speed as the first driven sprocket 5, but the pitching arm 2 is over the topmost point in FIG. In the range of β, the urging force of the spring 7 rotates at a higher speed than the first driven sprocket 5 and
Is thrown forward. At this time, since the roller 11 is rotating in the same direction as the pitching arm 2 at a speed N times that of the pitching arm 2, the pitching arm 2 is applied to the thrown ball X as shown in FIGS.
(In the direction of arrow E) in the opposite direction, and a ball that extends can be thrown.

In the present embodiment, the brake plate 22 is
Is provided, the vibration transmitted from the pitching arm 2 to the rotating shaft 3 after the ball is released is absorbed by the braking plate, and the vibration transmitted from the pitching arm 2 to the pitching machine 1 according to the present embodiment is reduced. Can be. Therefore, the pitching machine 1 does not move due to the vibration of the pitching arm 2, and it is possible to prevent the ball control from becoming inaccurate due to the pitching.

In this embodiment, a V-belt 17 is stretched between the first V-pulley 10 and the second V-pulley 12 in a stretched state, but as shown in FIG.
Between the pulley 10 and the second V pulley 12, a V belt 17 is provided.
May be stretched in a state where it is not tacked. When the V-belt 17 is stretched in a state in which the V-belt 17 is not tacked, the roller 11 moves in the same direction as the first V-pulley 10 (the direction of arrow F), that is, the pitching arm 2.
Of the pitching arm 2
When the player releases the ball, a reverse spin can be added in the direction of arrow G, whereby a falling curve (drop) can be thrown.

Further, in this embodiment, the roller 11 is configured to rotate in a direction parallel to the rotation direction of the pitching arm 2, but as shown in FIGS.
The roller 11 may be rotated at a predetermined angle with respect to the rotation direction. By tilting the roller 11 as shown in FIGS. 5 and 6, a chute or a slider can be thrown.

[0028]

As described above, according to the present invention, since the rotating means for rotating the ball is provided at the tip of the pitching arm, the ball thrown out of the ball throwing arm has:
It is possible to provide an arm-type baseball pitching device that has been sufficiently rotated and has a ball extending.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a baseball pitching apparatus according to the present invention.

FIG. 2 is a view showing an operation of a pitching arm of the baseball pitching apparatus according to the embodiment.

FIG. 3 is a diagram illustrating an operation of a roller of the baseball pitching apparatus according to the embodiment.

FIG. 4 is a diagram illustrating another operation of the roller of the baseball pitching apparatus according to the embodiment.

FIG. 5 is a diagram illustrating another state of the rollers of the baseball pitching apparatus according to the embodiment.

FIG. 6 is a view showing another state of the rollers of the baseball pitching apparatus according to the embodiment.

FIG. 7 is a front view of a conventional arm-type baseball pitching apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 baseball pitching device (pitching machine) 2 pitching arm 3 rotating shaft 4 gantry 5 first driven sprocket 6 motor 7 spring 8 fixed sprocket (fixed pulley) 9 second driven sprocket (driven pulley) 10 first pulley 11 roller 12 Second pulley 15 Ball receiver 16 Chain belt (first belt) 17 V belt (second belt) 22 Brake plate

Claims (11)

[Claims] 1. A ball receiving portion (15) for placing a ball for throwing on a tip thereof.
In a baseball throwing device in which a ball placed on a ball receiving portion (15) is thrown forward by rotating a throwing arm (2) provided with a ball, a tip of the throwing arm (2) A baseball pitching device, comprising: a rotating means (11) for applying rotation to a ball. 2. A baseball pitching apparatus according to claim 1, wherein said rotating means (11) includes a roller (11) for rotating the ball by rotating. 3. The baseball pitching apparatus according to claim 2, wherein a plane on which the roller (11) rotates is parallel to a plane on which the pitching arm (2) rotates. 4. A baseball pitching apparatus according to claim 2, wherein a plane on which said roller rotates rotates has a predetermined angle with respect to a plane on which said throwing arm rotates. 5. The baseball pitching device according to claim 2, wherein said roller (11) is rotated in the same direction as said pitching arm (2). 6. The baseball pitching device according to claim 2, wherein said roller (11) is rotated in a direction opposite to said pitching arm (2). 7. The rotating means (11) is formed in a disk shape centered on the rotation axis (3) of the pitching arm (2) and supports the rotation axis (3). A fixed pulley (8) fixed to (4), a driven pulley (9) rotatably attached to the pitching arm (2), and a first pulley that rotates integrally with the driven pulley (9). A pulley (10), a second pulley (12) rotating integrally with the roller (11), and a first belt (16) stretched between the fixed pulley (8) and the driven pulley (9). ), The first pulley (10) and the second pulley (12)
The baseball pitching apparatus according to any one of claims 2 to 6, further comprising a second belt (17) stretched between the base belts. 8. The baseball pitching apparatus according to claim 7, wherein the diameter of the fixed pulley (8) is larger than the diameter of the driven pulley (9). 9. The baseball pitching apparatus according to claim 7, wherein said second belt (17) is slashed. 10. A rotating shaft (3) of the pitching arm (2).
A braking plate (22) for absorbing vibration of the rotating shaft (3)
10. The baseball pitching apparatus according to claim 1, wherein a baseball is provided. 11. The baseball pitching apparatus according to claim 10, wherein said braking plate is sandwiched by a pair of pressing plates integral with a rotating shaft via a friction plate having a high friction coefficient.