JPS6211472A - Pitching apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a pitching device, and more particularly to a pitching device configured to be able to complexly change the properties of a pitched ball.

[Prior Art] Various pitching devices have been proposed for practicing ball games such as table tennis and baseball.

Most of these pitching devices use a pair of upper and lower drive rollers to sandwich the guided ball between them, and use the rotational force of the rollers to pitch the ball.

The pitching speed is changed by changing the rotational speed of the drive roller, and the spin strength is changed by changing the relative rotational speed of the two rollers, so that a curve ball can be thrown. be.

[Problems to be Solved by the Invention] However, since the pitching device having the structure described above has only two sets of drive rollers, there are only a few types of combinations of speed and spin, and it is difficult to realize combinations of speed and spin of all kinds. The problem was that it was not possible.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention arranges three or more drive rollers at equal angular intervals in the circumferential direction, and adjusts the rotational speed of each drive roller. It has a structure that allows it to be adjusted freely.

[Function] By adopting the structure described above, all kinds of speed and spin combinations can be realized by complexly combining the respective rotational speeds of three or more drive rollers, and all kinds of speed and spin combinations can be realized. You can increase the effectiveness of your practice by pitching a breaking ball.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 and subsequent figures explain the practical aspects of the present invention, and FIG. 1 shows an overall view of the apparatus.

In Fig. 1, the reference numeral l indicates the base of the device, and on this base l, a pair of left and right support frames 2 allow a long and narrow housing 3 to be rotated so that its vertical angle can be freely changed. Bearing possible.

A support plate 4 is fixed to the distal end side of the hollow casing 3 in a state perpendicular thereto.

A through hole 6 having approximately the same diameter as the sphere is formed in the center of the support plate 4 on the axis of the housing 3 and surrounded by the guide tube 5 .

On the other hand, four drive rollers 7 to 1 are provided on the outer side of the support plate 4.
0 are arranged at equal angular intervals in the circumferential direction, that is, at 90 degree intervals.

Each drive roller has a support frame 11 projecting from the support plate 4.
The support frame 11 is rotatably supported by a shaft, and is rotated by a motor 12 fixed to the other side of each support frame 11 .

The distance between the outer peripheral edges of opposing drive rollers 7 to 10 is approximately the same as the diameter of the sphere.

Furthermore, friction members 7a and lla made of rubber or foamed synthetic resin are fitted onto the outer peripheral surface of each drive roller.

On the other hand, adjacent to the back side of the support plate 4, there is a guide tube 1 shaped like a substantially "C" from the upper side of the tip of the housing 3 toward the tip.
6 is fixed.

The tip of this guide tube 16 communicates with the through hole 6 in the center of the support plate 4.

Further, a blower 17 for feeding spheres is fixed to the rear end of the housing 3, and the air flow generated by the blower 17 passes through the housing 3 through a transparent hole formed in the curved part of the guide tube 16. The sphere is blown into the guide cylinder 16 through the hole 16a, and the falling sphere is blown out from the through hole 6 and pushed out between the blowing drive rollers 7-10.

The sphere feeding means is not limited to the floor, but other means may also be used, such as a straight wire driven by a solenoid.

On the other hand, what is designated by the reference numeral 18 is a sphere feeding device, which is formed into a cylindrical shape as a whole and is supported by a column 19 fixed on the base l.

A dish-shaped frame 20 is fixed to the upper end of the sphere supply device 18, and a plurality of inclined support plates 21 are arranged at predetermined intervals on the lower side of the frame 20. A continuous spiral tube 22 is sandwiched between the tubes 21 and 21.

The upper end of this spiral tube 22 is connected to the dish-shaped frame 2.
0, and its lower end communicates with the upper end of the guide tube 16.

Therefore, a large number of spheres (for example, table tennis balls) 23 inserted into the frame 20 roll and move within the spiral tube 22 due to their own weight, and are guided into the guide tube 16.

Next, the operation of this embodiment configured as above will be explained.

First, the entire device is set in a corner of a table tennis table (not shown) on the other side of the net, and the angle of the housing 3 is adjusted to determine the height of the trajectory of the ball.

Then, the rotational speed of each drive roller is determined according to the skill of the practitioner, and the siliceous quality is set.

This rotational speed is set using a switch or the like on the control panel (not shown).

With this set state, the blower 17 is rotated via a switch (not shown), and the drive rollers 7 to 10 are rotated.
Rotate.

Then, the sphere 23 that has been guided into the guide cylinder 16 through the spiral tube 22 is sent out from the opening 6 between the drive rollers 7 to 10 by the air flow generated by the rotation of the blower 17, and the ball is pitched.

This pitching is performed by the rotation of the drive rollers 7 to 10, and the strength of the spin at this time is determined by the rotational speed of each drive roller.

The angle of spin is also determined by setting the relative rotational speed.

Therefore, if there is data on the batting and pitching of a well-known strong player, by setting the rotational speed of each drive roller based on this data, it is possible to realize a situation in which the player is playing against that player.

The pitched balls are hit back using a racket or the like, but the pitching of the balls is performed at partial pitches until all of the balls in the ball supply device 18 have passed through the spiral tube 22 and have been pitched.

In addition, if you want to change the pitch of the pitch, use the blower 1.
7 may be driven intermittently, or a shutter may be provided within the housing 3 and this shutter may be opened and closed at a predetermined pitch.

By the way, in the above-mentioned embodiment, the drive roller is
Although a structure in which four drive rollers 24 to 26 are provided is illustrated as an example, a structure in which three drive rollers 24 to 26 are arranged at intervals of 120 degrees in the circumferential direction may be adopted as shown in FIG.

When there are three drive rollers, there are fewer types of curveballs than when there are four, but compared to the conventional structure using two drive rollers, the ball throws far more curveballs. can.

Further, the number of drive rollers is not limited to three or four, and as long as it is three or more, a plurality of drive rollers may be provided.

[Effects] As is clear from the above description, according to the present invention, three or more drive rollers are arranged facing the supply port of the spheres in a state where they can grip the spheres, and the rotational speed of each drive roller is adjusted. Since it adopts a structure that allows free settings, the speed and spin of the pitched ball can be quickly and arbitrarily controlled and set electronically, making it possible to set pitches with all kinds of variation H. can be done.

[Brief explanation of drawings]

The drawings are for explaining one embodiment of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a sectional view of main parts, Fig. 3 is a front view when four drive rollers are provided, and Fig. 4 is a front view when four drive rollers are provided. The figure is a front view of a case where three drive rollers are provided. 1...Base 2...Support frame 3...Casing 4...Support plate 6...Through hole
7-10... Drive roller 12... Motor 1
6... Guide cylinder 17... Blower 18... Sphere supply device 23... Sphere Fig. 2

Claims (1)

[Claims] a support plate having a through hole in the center through which the sphere is guided; three or more drive rollers arranged at equal angular intervals in the circumferential direction and capable of holding the sphere between the through holes; A sphere feeding device that sequentially supplies the spheres to the through-hole side, and a feeding means that is arranged behind the support plate and feeds the spheres between the driving rollers, and the rotational speed of each of the driving rollers is independently controlled. A pitching device characterized in that it is configured to be adjustable.