JPH0520369Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a ball feeding device in a pitching machine.

(Prior art) Among the prior art, the pitching machine known as Design Registration No. 363180 is a pitching machine that supplies a ball between a pair of rotating discs and throws the ball from between the discs. be.

In the prior art, a pair of rotating disks whose outer peripheries are made of urethane foil are provided, and balls are supplied between the rotating disks. In addition, in this type of pitching machine, the type of pitch is changed by tilting the machine or changing the number of revolutions of the left and right rotating discs.

However, the ball feeding device in the prior art has a problem in that the ball is fed into the rotating disk unstably when the machine body is tilted, and as a result, the desired type of pitch cannot be obtained.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to provide a ball feeding device that can reliably feed balls even when the machine is used at an angle.

(Means for solving the problem) The means for solving the problem in this invention are as follows:
A pitching machine is equipped with urethane foils on a pair of parallel rotating shafts protruding from the machine body, and is equipped with a rotational drive mechanism that can rotate each urethane foil individually. and a ball supply main body having a ball supply port with obliquely formed both sides of the open portion, a ball supply port provided perpendicularly to the ball supply main body, a piston slidably provided in the ball supply main body, Bearings provided on both sides of the piston and rolled into guide grooves on the sides of the ball supply body; a rack gear provided on the end wall of the piston and protruding from the base end of the ball supply body; The stopper comprises a motor driven in the axial direction, a stopper having a spherical body that is provided near the ball supply port and biased toward the inside of the ball supply body and retreats from the ball supply body when the ball passes; The present invention is characterized in that the ball supply port of the ball supply main body faces between the pair of urethane foils.

(Example) In FIGS. 3 and 4, a machine body 1 is formed in a box shape, and a pair of rotating shafts 2 are provided to protrude from the upper surface of the machine body 1. Each rotating shaft 2 is provided with a disc 3 on the same plane through a key 4 on a portion protruding from the machine body 1, and a urethane foil 6 is fitted onto the outer periphery of the disc 3 by fitting a urethane 5 thereinto. It is formed.

Each of the rotating shafts 2 is attached to a bearing block 7 provided on the upper surface of the machine body 1, and at least one of the bearing blocks 7 is connected to the rotating shaft 2.
The urethane foil 6 is provided so as to be movable in a direction perpendicular to the longitudinal direction of the
The installation interval can be freely adjusted.

A mechanism for adjusting the mounting interval of each of the urethane foils 6 is built into the machine body 1, but in addition to this, the rotating shaft 2 is
A drive motor is provided that drives the left and right sides at different rotation speeds.

Each of the urethane foils 6 is equipped with a mechanism that can drive the left and right sides individually, so that they can be rotated at the same rotation speed or at different rotation speeds. In addition, the mounting interval of each urethane foil 6 is adjusted to be slightly smaller than the diameter of the ball, and the direction of rotation is such that the left side rotates counterclockwise and the right side rotates clockwise in FIG. 3. .

When the ball is fed between the urethane foils 6, the ball is ejected from the urethane foil 6 with a strong force. Also, the machine body 1
A desired type of pitch can be obtained by selecting the inclination angle and the number of left and right rotations of the urethane foil 6.

In addition, a safety cover 8 is provided on the upper surface of the machine body 1 to cover the urethane foil 6.

Next, the ball supply mechanism will be explained. 1st
2, the ball supply main body 10 is cylindrical and has a ball supply port 11 with an open end and an oblique side surface, and the ball supply port 11 is inserted between the urethane foil 6. It is fixed to the machine body 1 by mounting legs 12 provided on the lower surface. Reference numeral 13 denotes a ball supply port which projects in a direction perpendicular to the ball supply main body 10 and is open at the top, into which balls are fed from above.

Further, the ball supply main body 10 houses a piston 14 which is retracted behind the ball supply port 13 and moves forward and backward toward the ball supply port 11, and the piston rod of the piston 14 is located at the base end of the ball supply main body 10. The protruding portion is formed on the rack gear 15. 16 is the ball supply main body 1
0, 17 is a gear head, 18 is a motor, and the motor 1 is
By driving the gear 8, the rack gear 15 is moved forward and backward, and the piston 14 is moved.

In order to ensure stable engagement between the rack gear 15 and the pinion that drives it, bearings 19 are provided on both sides of the piston 14, and the bearings 19 are provided along the length of the ball supply body 10 in a guide. It is accommodated in the groove 20 (FIG. 5).

21 is the ball supply port 13 and the ball supply port 1;
A spherical body 2 protruding toward the inside of the ball supply main body 10 with a ball stopper provided between the spherical body 1 and the ball supply body 10.
2 is provided so as to be movable in the vertical direction with a mounting screw 23, and a spring 25 installed between the collar 24 of the mounting screw 23 and the spherical body 22 normally moves the spherical body 22 toward the ball supply main body 10. It stands out.

Balls are thrown into the ball supply main body 10 from the ball supply port 13 while the piston 14 in the ball supply main body 10 is retracted. Then the motor 18
When the piston 14 is moved forward toward the supply port 11 by driving the ball, the ball is supplied from the ball supply port 11 against the stopper 21 to between the urethane foil 6, and is ejected from the urethane foil and thrown.

The machine body 1 has the urethane foil 6 oriented vertically as shown in Fig. 6A, and the upper foil 6 is
If you throw a ball while rotating the lower foil 6 at 1200 rpm and 2340 rpm, the ball will fly straight out. Note that a hardball baseball has a diameter of 74 mm.

The inventor's experimental results have shown that it is easier to control the ball when the urethane foils are placed at intervals of 50 to 52 mm. In addition, the speed of the ball increases by increasing the rotation speed of the urethane foil, and slows down by decreasing the rotation speed, but the type of ball can be changed by selecting the rotation speed of the left and right foils and changing the inclination angle of the machine body.

Figure 6 shows examples of how the machine is used, all of which are for right-handed batters, and all of the figures are viewed from the direction in which the ball is fed.

A is a straight ball B is a ball that curves while rising from right to left (slider of a low-handed pitcher) C is a slider that curves from right to left D is a curve ball E is a curve that falls vertically (drop ball) F is a shot ball G is a ball that curves from left to right Ball that curves (slider) Polish the outside to make the sides parallel.

(Effects of the invention) The effect of this invention is that even when the machine body is used at an angle, the ball can be stably fed between the urethane foils used to throw the ball, thereby ensuring that the desired type of pitch can be obtained. There is.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view of the entire assembled ball supply mechanism, Figure 2 is a plan view of the same, Figure 3 is a plan view of the ball supply mechanism assembled into the machine body, Figure 4 is a front view of the same, and Figure 5 is a top view of the assembled ball supply mechanism. The figures show the piston of the supply mechanism, A is a plan view, B is a front view, and FIGS. 6A to 6H are explanatory diagrams showing examples of use of the pitching machine. 1...Machine body, 2...Rotating shaft, 3...Disc, 5...Urethane, 6...Urethane foil, 7
... Bearing block, 11 ... Ball supply main body, 1
1...Ball supply port, 12...Mounting leg, 13...
Ball supply port, 14... Piston, 15... Rack gear, 16... Linear head, 17... Gear head, 18... Motor, 19... Bearing, 2
0... Guide groove, 21... Stopper, 22...
Spherical body, 25...spring.

Claims (1)

[Scope of utility model registration request] A pitching machine is equipped with urethane foils on a pair of parallel rotating shafts protruding from the machine body, and is equipped with a rotational drive mechanism that can rotate each urethane foil individually. and a ball supply main body having a ball supply port with obliquely formed both sides of the open portion, a ball supply port provided perpendicularly to the ball supply main body,
A piston slidably provided in the ball supply main body, bearings provided on both sides of the piston and brought into rolling contact with guide grooves on the sides of the ball supply main body, and a bearing provided on the end wall of the piston and provided with the ball A rack gear protruding from the base end of the supply main body, a motor that drives the rack gear in the axial direction, a motor provided near the ball supply port and biased toward the inside of the ball supply main body, and a motor that is biased toward the inside of the ball supply main body when passing the ball. 1. A ball supply device for a pitching machine, comprising a stopper having a spherical body retracting from a ball supply body, and a ball supply port of the ball supply body facing between the pair of urethane foils.