JPS58180169A - Automatic ball sending 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] The present invention relates to an automatic ball throwing device used for tennis practice.

The ball cutting section of this type of automatic ball throwing device uses a rotary plate having a plurality of holes or notches, and the balls that have entered the holes or notches of the rotary plate are ejected one by one by their own weight or dropped. There is one thing that is sent to the ball launcher by air conveyance.

However, since the Me rotary plate is a rigid body, the holes or notches (balls that have entered the ball may get caught between the rotary plate and the discharge port when being discharged) are particularly important to shorten the time (interval) for cutting out the balls. The higher the rotational speed of the rotary plate, the higher the probability of such jamming.

Further, the time during which the cut balls are transported by air or their own weight to the firing section depends on the diameter of the ball and the state of the progress of transport, making it unstable and not providing a constant firing interval. Furthermore, the mechanism was complex, prone to breakdowns and wear, lacked durability, and was expensive.

In view of the above-mentioned drawbacks of the conventional techniques, the present invention has been developed to cut out the ball reliably, to maintain a constant sum of firing intervals, to adjust the firing interval to any Km, and to provide an inexpensive l-le cut-out machine with increased durability. 6. Get an automatic ball throwing device.

Hereinafter, the present invention will be explained in detail based on an embodiment shown in the drawings.
cExplain.

In the embodiment shown in FIGS. 1 to 3, reference numeral 1 denotes a main body of an automatic ball throwing device, and a projectile tube 2 is fixedly installed within the main body 1 of the projector. This launch tube 2 has a wheel insertion hole 3.3 formed in the upper and lower parts of the center, and a ball inlet 4 on the upper surface near the rear. This hose 5 is attached to the ball inlet 4 as a hose G-in) 7KK. Reference numeral 8 denotes a check plate that is attached to the rear end of the firing tube 2 and prevents the ball 6 that has fallen from the ball inlet 41 from moving in the counter-launching direction. 9, 9 is the wheel insertion hole 3.3 of the launch tube 2
A pair of upper and lower wheels are rotatable in the direction in which the IK ball of the ejector main body, a part of which is inserted, can be ejected, and the upper and lower wheels 9, 9 are fixed to the IK ejector main body. The upper and lower drive motors 10 and 10 are fixed to the upper and lower drive motors 11.11 by means of set screws 12.12. 13 is a ball cutting device;
/ The ejecting device 1 part 3 has a notch 14 shaped like an apex extending from the rear of the launch tube to approximately the center thereof, and this notch @14.
a notch 15 formed in the upside-down plate 8 at a position corresponding to;
・The outer surface of the firing part main body l is fixed and the cut-out motor mounting plate 16 and the cut-out motor attachment plate 16#c are fixed.
The cutout motor 17 has a cutout motor 17, and the notch 14. It is possible to enter into the ball 6.
There are a plurality of blades 2o at intervals of one person, in this example, five blades 2o.
It is composed of a cut-out blade 21 having a diameter.

In the above configuration, if the balls 6 are sequentially supplied into the hose 5, the IC upper and lower drive motors, IQ, IQ cylinder
When the cut-out motor 17 is driven at the required speed, the upper and lower wheels 9.9 and the cut-out blades 21 shown in FIGS. 2 and 1 are rotated in the direction of the arrow. To prevent this, the ball inlet 4 is opened by using the weight of the ball 6 from inside the hose 5.
The ball 6 that has entered the firing tube 2 is surely pushed into the space between the upper and lower wheels 9, 9 by one blade 20 of the cut-out blade 21. For this reason, the upper and lower wheels 9.9
The ball 6 pushed into the barrier is pushed into the upper and lower wheels 9, 9
is fired because it is rotating at high speed.

In addition, the inner diameter of the launch tube 2, the inner diameter of the ball inlet 4, the cutout blades 210, and the dimensions between the blades 20 are respectively slightly larger than the diameter area of the ball 6 so that the ball 6 does not get caught and two individuals do not separate. It is set.

As is clear from the above description, the present invention has the following effects.

(11) The ball that falls into the launcher from the ball inlet of the launcher can be reliably pushed between the pair of wheels.

(2) Since the ball is pushed between a pair of wheels each time the cut-out blade rotates, there is no failure and the ball is highly durable.

(3) The structure is simple and inexpensive.

(4) Since the blade spacing of the cut-out blades is set to a size that accommodates one ball, it is possible to reliably push the balls one by one between the pair of wheels.

(5) Since the rotational speed of the cutting motor can be set to any Kf, the ball firing interval can be set arbitrarily.

(6) Since the distance between the ball inlet and the pair of wheels can be made as small as the radius of the cutting blade, the time from cutting out to firing the ball can be shortened.

4. Brief Description of the Drawings Figure 1 is a cross-sectional view showing one embodiment of the present invention; Figure 2; Figure 3;
The figures are shown in Figure #4 of the main part of the present invention.

1: Launcher body, 2: Launch tube, 3: Wheel insertion hole, 4: Ball inlet, 5: Hose,
6: TM-L.

7: Horsey India, 8: Check plate.

, 9.9: Upper and lower wheels, 10.10: Upper and lower drive motors.

ll: Shaft, 12: Set screw.

13: Ball cutting device, 14: Notch 1! Part, 15
: Notch, 16: Cutout motor mounting plate, 17
: Cutting motor, 18: Rotating shaft.

19: Set screw, 20: Blade, 21: Cut out feather.

Patent Applicant: Fuji Electric Manufacturing Co., Ltd. Representative Patent Attorney
Yoshihisa Narioka Figure 1

Claims (1)

[Claims] l) The balls are dropped into the launcher at the ball entrance area of the launcher via a hose in an aligned state, and the balls that have fallen into the nuclear launcher are pushed through a pair of opposing wheels to be launched (automatic ball throwing device). Then, insert the ball cutting device into the ball inlet and launch tube (a rotatable cutting blade with a plurality of blades placed in the wheel to push the fallen balls one by one). and,
An automatic ball throwing device comprising a motor capable of rotating this cut-out blade at an arbitrary rotational speed.