JPS60215380A - Ball throwing machine for baseball - 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 (Field, Object) The present invention relates to a baseball pitching machine that emphasizes control.

(Background Art) The ball is not thrown in the tangential direction of the rotating body, as seen in conventional baseball pitching machines, which hold the ball at the tip of a rotating arm and swing it around to throw the ball. , if the position at which the ball is released changes slightly, the angle at which it is thrown will also change slightly. Even if there is only a slight deviation, there will be a considerable discrepancy at 10 or 20 meters ahead, so it is said that d1 control is poor.It is good for practicing hitting balls on various courses, but the ball It is difficult to judge strikes, and it is not suitable for practicing ``not hitting the ball.'' In order to practice while judging balls and strikes, an umpire must stand behind and accompany the player. Furthermore, even if there is an umpire, it is said that it is difficult even for experts to judge a ball strike when the bat is swung but not swung.

The distance between the pitcher and catcher may be shorter than the regular distance to practice focusing on the course and getting your eyes used to it, but control is more important than anything else.
There is a need for a pitching machine that can throw multiple pitches on the same course in succession. In softball, where the distance between pitcher and catcher is short, it is especially necessary to practice to develop a sense of the course.

(Purpose, Configuration) The present invention has an object to provide a pitching machine with excellent control, and its configuration includes a slider that is guided along a straight line just before the brake is applied, so that the ball hits the front of the slider. The slider is accelerated from zero speed and brake is applied when the slider reaches the maximum speed (I-Characteristic).

(Effect, yJJ effect) The brake is applied to the slider when it accelerates from zero initial velocity and reaches the maximum speed when it is on a straight line, so the slider does not hit the ball strongly and the ball remains attached to the slider until the end. Since the ball is released smoothly, there is no outside force added to the ball at the moment of separation, so the ball is thrown in a straight line, with excellent control. Even if you choose to spin rather than throw, the course you throw is extremely accurate. When carrying out the game, efforts are made to give the ball some rotation to prevent it from swinging or falling freely.

(Example) In Fig. 1, l is a guide cylinder fixed on a support base that can tilt in a vertical plane, 3 is a ballistic piston fitted in the guide cylinder, and da is a piston rod integrated with the piston 3. ! is a slider connected to the front end of the . Piston rod! Although it is long, if it is made of stainless steel, it will not bend much, so the guide tube Otsu is not necessarily necessary for Squidag. One or more round holes ♂ are drilled in the rear end wall 7 of the guide tube l, and the pressurized air cylinder provided in the rearward extension of the guide tube l is covered with a pressurized air cylinder and is free to rotate. - one or more holes 1/ are drilled on the radius; This revolver l[theta] is provided with a key ball 2 for determining a fixed rotational position, which is pushed by a spring 13 that biases the revolver in the center direction. /4t is the compressor, 13 is the constant pressure tank, about! It is stabilized at atmospheric pressure.

There is an open window /6 in the middle of the guide tube l. When the piston passes the open window lB, the rear part of the guide tube suddenly becomes low pressure, and when it is detected through the detection tube 12, the valve closes to the high pressure air supply tube /r and no air is supplied. . 1 is a valve that opens the high pressure air cylinder to the atmosphere when the air supply is cut off.

The front surface of the slider is, for example, a spherical abutment. A mouth J is opened just above the slide dug in the retracted position, and the ball in the transfer pipe 21 is dropped from there. There is a retractable piece 23 at the bottom of which is pressed against the spring cover.
A part of this protruding piece n is provided with a spherical surface, 2g, which complements the spherical surface. As shown in the figure, the ball dropped from the mouth I is stable and does not roll forward.

As shown in Figure 2, the middle part of the spherical surface of the slider is sometimes provided with a slightly depressed groove.

In addition, 26 is a width-inset handle for freely tilting the support base 2 on the fixed base J on the vertical pillar 27, 29 is a vertical pillar on the base 3θ that supports the vertical pillar 27 freely in rotation, and 29 is for fixing the vertical pillar 27. The screw-in handle, 31, is a button that, when pressed, supplies high-pressure air. In addition, the bevel gear that rotates together with the 32 beam Porver 10, JJF! 9 gears 34t1 belt 3 meshing with 3 bevel gears! A round hole 36 is made in the disk which rotates through the revolver, and when the revolver 10 is rotated once, one ball is dropped from the mouth. g is the ball reservoir. Although detailed explanations are omitted, it is conceivable that all equipment could be fully automated and unmanned.
Piston rod! If the piston is pulled back 3ft by the rod M extended rearward, it will be safer. 3 is a slider for adjusting the initial speed.

For this adjustment, the air pressure may be changed.

FIG. 3 shows an improved version of the slider 4t, in which a forward-facing transfer table si extends from the top of the slider, and a groove j2 is carved in the middle of the lower surface thereof. The groove j2 of the transfer table is slightly inclined with respect to the central axis of the guide tube 6, and is inclined more toward the front than downward. This rolling table can be placed on the side or below, making it both classy! 3 is given a greater inclination toward the axis at the front. The groove in the illustrated example is such that the ball thrown is straight. Although not shown, the transfer table ti or its groove j2
A large number of diagonal holes may be formed in the ball, and the air may be ejected from the diagonal holes so that the air flows backward to impart further rotation to the ball.

With the above configuration, rod 3? Pull back to the reverse limit position,
When the revolver IO is rotated once, one ball enters from the mouth and is stably captured by the slider by the spherical surface of the retractable piece 23 and the slider.

When the bush button 31 is pressed, high-pressure air of approximately j atmospheres is constantly supplied into the cylinder, and the ballistic piston 3 begins to move slowly. The slide dog starts to move slowly and immediately pushes the retractable piece 23 all the way, and the ball hits the spherical surface 2 of the retractable piece 23.
By the time it leaves 41, it has already been pushed by the slider with a large acceleration and has become attached to the spherical surface of the slider, so it will not leave the spherical surface of the slider without the assistance of the spherical surface 2da. If the cross-sectional area of the piston is approximately lθd, the maximum speed will be approximately lo after traveling approximately 7 meters.
At that time, the piston 3 passes through the window 16 of the guide cylinder l and does not receive high pressure, but instead enters the front part of the guide cylinder, so strong braking pressure is applied. receive,
The brakes are applied suddenly.

At maximum speed, piston 3 and slider are on a straight course, so the ball is thrown straight away in that direction without being given any rotation. If the piston passes through the window 16t, low pressure will be generated in the rear part of the guide tube/cylinder, which will be detected by the detection tube/2 and the supply of high pressure air will be stopped. When the rod M is pushed back to some extent by the spring action of the air in the front part and the rod M is pulled back, it is possible to prepare for the next pitch.

Although the repo bar 10 has been described only for supplying balls, it can also be used for supplying pressure.

If there were no air resistance, a ball flying at a speed of lθ0 at a speed of 4 would fly 70 meters, fly about 03 (A, 21) meters, and fall about /Gm, which is y straight, but because of air resistance. If the ball is not given any rotation, it may become a knuckleball, causing it to wobble, drop suddenly, or curve. In the present invention, since no rotational force is applied from the slider to the ball that leaves the slider, even if the ball is thrown in an accurately determined direction, the song may sometimes drop.To prevent this, the slider Transfer table added to! /teeth,
Since the direction of throwing the ball is slightly downward with respect to the axis of the guide cylinder 6, the ball that gently separates from the slider's contact area is a rolling table! l, especially the rolling table! l groove j2
Even though the inclination is slight, the negative acceleration of the slider is extremely large, so the ball is strongly attracted and guided by both edges and rolls, causing the ball to rotate at high speed. The circumferential speed of the ball's outer periphery at the edge of separation from the transfer table is approximately 10
A rotational force is applied to the 0 ball, which is 0 km A, but that force is exactly opposite to the direction of the ball's movement, and the large momentum of the ball is preserved as it is, without disturbing the direction of the ball's movement. In this case, the spin acts to preserve the direction of motion, and in this case, the buoyancy and gravity are in opposite directions, so the ball is straight and control is excellent. rod! Rotatably attach the and slide tag to the rolling table SL! A curveball can be thrown by rotating the ball around and adjusting the rotational position.

If you have a scale mark, you can accurately cast to various courses, both high and low, and outside. A net 410 may be provided to allow the batter to hit the ball. In order to prevent the guide tube from tilting due to the reaction of the ball and to prevent it from moving backward, it is recommended to attach a brake to the wheel 4tl.In addition, attach a pin set-shaped clamp to the slider and use it to clamp the ball. Even if you don't do anything, you can still throw a curveball, but the course will definitely be inaccurate. However, since the direction in which the ball is thrown is accurate, it is possible to impart considerable accuracy when imparting spin to the ball.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view showing an improved slider, Fig. 3 is a sectional view showing an improved slider, and the Oda diagram is taken along the IV-N line in Fig. 3. FIG. 111. Guide tube, 3010 ballistic piston, g9. . Slider. Engraving of drawings (no changes to the content) Procedures and amendments (method) 1939! May 74 to Day 4 Relationship with the case of the person making the amendment Patent applicant's name Naka Kiyo joint name representative (shipment date θ, 4t, 3θ) Symmetry of amendment Drawing

Claims (1)

[Claims] Immediately before the brake is applied, a slider is provided that is guided in a straight line, and a contact part is provided on the front of the slider to which the ball is applied.The slider is accelerated from zero speed, and the brake is applied when the slider reaches the maximum speed. A baseball pitching machine characterized by: