JPS6213644Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tennis pitching machine that allows the pitching angle to be adjusted both vertically and horizontally, and to enable continuous pitching.

The illustrated embodiment will be described below.

Reference numeral 1 denotes a box-shaped base with a substantially rectangular plane. Rubber legs 2 are attached to the four corners of the lower surface of the lower plate 1a, and rubber wheels 3 are attached to the rear parts of the left and right plates 1b and 1c. These wheels 3, 3 do not touch the ground when each leg 2 is in contact with the ground, but touch the ground when the base 1 is tilted diagonally forward.

Reference numeral 4 denotes a handle having a substantially inverted U shape, and a grip portion 4c is horizontally suspended from the upper ends of both long side portions 4a, 4a, the lower surface of which is fixed to the rear portion of the upper plate 1d of the base 1.

5 is a handle fixed to the front plate 1e of the base 1.

6 is a machine frame, which has both lower ends of an inverted U-shaped frame rod 6b fixed to the rear part of a square base plate 6a;
A support plate 6c is horizontally suspended approximately in the center of the frame rod 6b, and a guide plate 6d in which an arcuate long hole 7 is formed is horizontally suspended above the frame rod 6b. It is pivotally supported in the center of the upper plate 1d of 1 so that it can be rotated horizontally.

1f is a support part integrally formed on the right side of the base 1, and a motor 1 for rotating a disk 9 pivotally supported on the support part 1f.
0 is mounted on the lower side of the support part 1f, and one end of the rod 12 is pivoted to a pin 11 established around the upper surface of the disk 9, and the other end of the rod 12 is pivoted to a pin 13 established on the base plate 6a. The rotation of the disk 9 causes the machine frame 6 to horizontally rotate (18 degrees left and right).

14 is a limit switch provided on the support part 1f, which presses the tip of the actuator against the circumferential surface of the disk 9, and connects it to a pair of protrusions 15, 15' attached to a part extending halfway around the circumferential surface. The motor 10 is actuated by contact with the motor 10, and the rotation of the motor 10 is controlled by a control circuit (not shown) connected thereto.

Reference numeral 16 denotes a housing, which is in the shape of a vertically long rectangular parallelepiped box, and the center part of the rear plate 16a is supported by a shaft 17 on the support plate 6c of the machine frame 6 so as to be vertically rotatable (up and down 50 degrees). The threaded rod 18 attached to the upper left side of the rear plate 16a is connected to the guide plate 6d of the machine frame 6.
It can be fixed at a desired turning position by inserting it into the elongated hole 7 and tightening a knob 19 that is screwed into the protruding portion.

Reference numerals 20 and 20' designate a pair of upper and lower rotors, which are injection mechanisms built into the housing 16, and the rotors have circumferential surfaces slightly concave in the center that face each other vertically with an interval corresponding to about 2/3 of the diameter of a tennis ball. The tennis balls sandwiched between them are rotated in opposite directions by AC continuously variable speed motors (not shown), and the tennis balls sandwiched between them are delivered to the injection hole. 21.

The injection hole 21 is located on the left plate 16b of the housing 16.
The rotors 20 and 20' are provided at locations corresponding to opposing portions of the rotors 20 and 20'.

Reference numeral 22 denotes a flat circular converging hopper attached to the upper part of the housing 16, and a semicircular input port 23 is provided on the upper surface.
A pulsator 24 that is rotated by a motor (not shown) is installed inside the housing 16, and the stored tennis balls are transferred one by one to the rotor 2 through a guide passage 25 provided in the housing 16.
0 and 20'.

Reference numeral 26 denotes an operation panel provided at the rear upper part of the housing 16, which operates the rotation of the machine frame 6 and the rotors 20, 20'.

However, from the ball hopper 22 to the rotor 2
The tennis balls fed to the holes 0 and 20' are ejected through the injection hole 21, and are ejected from the court by horizontally rotating the machine frame 6 by the motor 10 and automatically changing the ejection angle from side to side. By vertically rotating the housing 16 and adjusting the ejection angle up and down, desired pitches such as strokes and lobing can be made.

In the above embodiment, the machine frame is rotated by a motor, but the machine frame may be rotated manually, and the injection mechanism is not limited to a rotor but may be a suitable mechanism such as a spring.

As is clear from the above, according to the present invention, a housing containing an injection mechanism is pivotably supported on a base so as to be pivotable horizontally, and a housing containing an injection mechanism is pivotably pivoted vertically. Since a ball hopper is provided, by rotating the machine frame horizontally to change the ejection angle of the tennis ball to the left or right, it is possible to continuously throw tennis balls to a fixed position on the left or right side of the court, and by rotating the housing vertically, the ejection angle can be changed up or down. Since the desired continuous pitches such as strokes and lobing can be made by this method, a variety of pitches can be efficiently performed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a rear view, FIG. 3 is a plan view, FIG. 4 is a left side view, and FIG. 5 is a right side view. 3, 3...Wheel, 4...Handle, 1...Base, 6...Machine frame, 20, 20'...Rotor serving as an injection mechanism, 16...Housing, 22...Ball collecting hopper.

Claims (1)

[Scope of utility model registration request] A machine frame is pivotably supported horizontally on a base having wheels and a handle, and a housing containing an injection mechanism is pivotably supported vertically on the machine frame,
A tennis pitching machine characterized in that a ball collecting hopper for supplying tennis balls to the ejection mechanism is provided on the upper side of the housing.