JP2001327643A - Throwing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thrown ball having a precise speed and position in the training of a ball game such as baseball, tennis or table tennis. SOLUTION: This throwing machine comprises an impeller having a flange 2 fixed to a shaft 4 rotatably journaled by a bearing 5, a spiral blade 1 fixed to the flange 2, and a flange 3 having a ball feed port 6 in the center and fixed to the spiral blade 1; a guide cover 12 having a throwing port 13 and set on the circumference of the impeller; a shutter 7 arranged on the ball route of the spiral blade 1; and a cam 8 for opening and closing the shutter 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the practice of ball games such as baseball, tennis and table tennis.

[0002]

2. Description of the Related Art In this type of conventional pitching machine, a ball is set at the tip of an arm, a spring is arranged near a center of rotation, and the ball is thrown by the restoring force of the spring. There was a method of putting a ball between tires to give speed.

[0003]

In this type of conventional pitching machine, it is difficult to control the speed, direction and position of the pitched ball.

[0004] It is an object of the present invention to provide a practice method for improving the skill of a ball game, since the control of the direction and position of a thrown ball is ensured.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a pitching machine according to the present invention rotates an impeller having a spiral blade and supplies a ball near the center of rotation to form a spiral. An effective method is to rotate at a high speed as it moves to the outer periphery along the wings, and to finally throw the ball at a high speed from the outer periphery.

[0006]

[Function] The impeller is rotating at a constant speed, but the sphere is supplied near the center and the initial peripheral speed is slow, and moves to the outer periphery along the spiral blade (1) due to centrifugal force, and the peripheral speed accordingly. When the ball jumps out, it is at its highest speed. Because of this,
The speed can be easily transmitted to the ball, and the supply of the ball becomes easy.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment will be described with reference to the drawings. In FIG. 1, a shaft (4) is rotatably supported by a bearing (5) and a pulley (14) and a belt (1).
The sphere (10) supplied from the supply port (6) by the rotational force given by 5) moves to the outer periphery along the spiral blade (1) by centrifugal force, and contacts the guide cover (12). At the end, it jumps out of the throwing port (13) with the position, direction and speed kept constant. When the ball (10) jumps out of the throwing port (13) before coming into contact with the guide cover (12), since the position and direction are not constant, the shutter (7) is closed once and passes through the throwing port (13). The shutter (7) is opened, the ball (10) is brought into contact with the guide cover (12), and is then ejected.

[0008]

Since the present invention is configured as described above, the following effects can be obtained.

Although the impeller having the spiral blades is always rotating, the peripheral speed is low near the supply port (6), so that the supply of the ball (10) becomes easy, and it is impossible to transmit the speed. There is no.

[0010] Further, by providing the shutter (7) and the guide (12), the accuracy of the position, direction and speed of the pitch is good.

The mechanism is simplified as a whole.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pitching machine.

FIG. 2 is a sectional view taken along line AA of the pitching machine.

FIG. 3 is a diagram of an arm-type throwing machine.

FIG. 4 is a view of a tire-type throwing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spiral blade 2 Flange 3 Flange 4 Shaft 5 Bearing 6 Supply port 7 Shutter 8 Cam 9 Frame 10 Ball 11 Supply guide 12 Guide cover 13 Throw port 14 Pulley 15 Belt

Claims (2)

[Claims] 1. A flange (2) is fixed to a shaft (4) rotatably supported on a bearing (5), and a spiral blade (1) is fixed to the flange (2) to form a spiral blade (1). ), The impeller having a flange (3) having a ball supply port (6) at the center is rotated to supply the ball from the ball supply port (6) to give the ball a speed. Machine 2. The spiral blade (1) according to claim 1,
A guide cover (12) having a throwing port (13) is installed around the outer periphery of a blade table having a shutter, and a shutter (7) is arranged on the path of the ball of the spiral blade (1).
Pitcher with a cam (8) that opens and closes the ball to control the position and direction in which the ball pops out