JPS5822229B2 - Feeding device for robot machine for table tennis practice - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a delivery device for transferring balls supplied from a hopper to an ejection device at predetermined time intervals in a table tennis practice robot machine.

Conventional delivery devices include, for example, Japanese Patent Publication No. 52-20888.
As shown in the ``Table Tennis Ball Serving Device'' in the publication, the ball descends from an upper hopper-shaped container to a lower tray, and is projected into the tray in the tangential direction by the blades of a rotating cylinder suspended vertically within the tray. The injection device is configured such that the extruded balls are sandwiched between a rotating wheel and a pad attached to a support member, and are injected by the frictional force of the extruded balls. It is composed of

Therefore, this ball serving device does not emit the impact sound of repelling the ball.

However, in table tennis, players visually observe the opponent's movements and the ball, as well as listen to the sound of the ball being hit by the racket, and use this visual and auditory sense to prepare themselves, so they emit the hitting sound. Devices that do not do this lack one element of practice and are far from perfect.

In view of the above, it is an object of the present invention to provide a delivery device that accurately delivers balls one by one and also emits a hitting sound.

The gist of this invention is to provide a descending control mechanism for lowering the balls at predetermined time intervals in the vertical pipe section of the L-shaped tube through which the balls descending from the hopper can pass, and to make the balls wait at the bending section of the L-shaped tube. A repelling mechanism that operates in synchronization with a descending control mechanism is configured to repel the L-shaped tube toward the distal end of the horizontal portion of the L-shaped tube, thereby emitting a striking sound.

The present invention will be described in detail below with reference to actual cases shown in the drawings.

In FIGS. 1 and 2, an L-shaped tube 3 formed by a vertical tube section 1 and a horizontal tube section 2 is formed with an inner diameter that allows a table tennis ball 4 to pass through, and its lower end is perpendicular to the vertical tube section 1. 9
is fixed.

On the circumferential surface of the vertical tube section 1 opposite to the horizontal tube section 2, an upper slit 5, a central slid 6, and a lower slid 7 are perforated in a direction perpendicular to the vertical tube section 1.

The rotating shaft 8 is installed parallel to the vertical pipe portion 1 at a position facing the slits 5 to γ, is supported by a pedestal 9, and can be driven in the direction of arrow A by a variable speed motor 10 fixed to the lower surface of the pedestal 9. It is configured.

A control plate 11 and a cam plate 12 are respectively fixed to the shaft 8 and are rotatable through the slits 5 and 6.
The gap between the cam plate 12 and the gap between the cam plate 12 and the bottom surface of the bent portion 3a of the L-shaped tube 3 are formed to be slightly larger than the diameter of the ball 4, and the center of the slid γ is located at the bent portion 3a. It is formed so that it is at the same height as the radius of the ball from the bottom of the ball.

The outer diameters of the control plate 11 and the cam plate 12 are large enough to hold the ball on the upper surface within the vertical pipe portion 1, and a notch 11a is carved on the outer periphery of the control plate 11. is formed to allow the ball 4 to descend within the vertical pipe portion 1, and a cutout portion 12c formed by a radial straight portion 12a and a spiral curved portion 12b is carved in the cam plate 12. The notch 1 is formed inside the vertical pipe 1.
When the ball 2c passes, the ball 4 above the ball 4 is configured to be able to descend.

The phase difference between the control plate 11 and the cam plate 12 is determined by the vertical tube portion 1
When the notch 12 passes through the notch 12, the ball 4 that descends is once caught by the cam plate 12, and when the cam plate 12 further rotates and the notch 12c passes, the ball 4 descends, and the cam plate 12 further rotates. Then, the straight portion 12a is configured to pass a cam roller 17, which will be described later.

And the above-mentioned slit 5.6, control plate 11, cam plate 12
The descending control mechanism 13 is configured by the following.

A support shaft 14 is erected on the upper surface of the pedestal 9 in front of the vertical tube section 1, and a resilient member 15 is pivotally attached to the support shaft 14. Its tip is formed into a convex curve so as to face the height center of the ball 4 waiting on the bottom surface 3a of the bending part.

Further, a cam roller 17 is loosely engaged with the upper end of the stud 16 erected in the branch portion 15a, and the cam roller 17 faces the outer peripheral surface of the cam plate 12 and is biased by a tension coil spring 18.

The spring 18 has one end connected to the stud 16 and the other end connected to the frame 9.
It is hung on a hook erected.

A resilient mechanism 19 is constituted by the slid 7, cam plate 12, stud 14, resilient member 15, cam roller 17, spring 18, and the like.

Incidentally, reference numeral 20 denotes feathers for holding the balls 4 waiting on the bottom surface of the bending section 3a, and two feathers are planted symmetrically along the circumference of the bottom surface of the bending section 3a.

Further, reference numeral H indicates a hopper, and reference numeral P indicates an injection roller, which is installed in correspondence with a pipe member connected to the horizontal pipe portion 2.

When the balls 4 are stored in the hopper H and the motor 10 is started at a desired speed, the descending sterilization mechanism 13 is operated via the rotating shaft 8, and one ball 4 is moved to the bending section 3 through the above-described process.
It descends to the bottom of a and waits while being supported by the feathers 20.
Further, the cam plate 12 rotates, and the straight part 12a of the cam plate 12
When the ball passes the cam roller 17, the repelling member 15 suddenly turns under the tension of the spring 18, repelling the waiting ball 4 toward the injection roller P, and at this time producing a striking sound.

As the cam plate 12 rotates, the resilient member 15 returns to its original position according to the curve 12b.

Thereafter, the above-mentioned operation is repeated.

Note that the repelled ball is immediately ejected by the roller P.

Also, the variable speed motor 10 can be adjusted to change the time interval of delivery.

As described above, the delivery device of the present invention lowers the balls descending the vertical tube portion of the LL-shaped tube one by one at predetermined time intervals using a descending control mechanism, and makes them wait at the bent portion of the L-shaped tube.
In this part, the repelling mechanism is configured to repel the waiting ball toward the distal end of the horizontal tube.
Balls are sent out accurately one by one and accompanied by a hitting sound, allowing table tennis practice to feel just like a real game.

In addition, as shown in FIG. 3, in this invention, a vertical slit 25 is carved on the side surface of the vertical tube section 21 of the L-shaped tube 23 opposite to the horizontal tube section 22, and a horizontal rotation axis is formed opposite to this slit. 2
8, a cylinder 29 is fixed to the rotating shaft 28, blades 30 are provided radially protruding from the cylinder 29, and the blades 30 are formed to be rotatable by passing through the slit 25 and inside the vertical tube part 21. It constitutes the descending control mechanism 33, and also includes the horizontal support shaft 34.
The elastic mechanism 3 is made up of the elastic member 35 that engages with the elastic member 35, the cam 32 driven by the horizontal rotation shaft 31, and the spring 38.
9, the blade 30 rotates once per revolution of the cam 32.
The ball 4 can be configured to rotate by a pitch, lower the ball 4 at predetermined time intervals, and rebound the ball 4.

[Brief explanation of the drawing]

1 and 2 show an actual case of the present invention, FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a front view showing another actual case. 1...Vertical pipe section, 2...Horizontal pipe section, 3
...... L-shaped tube, 3a... Bent part, 4...
...Ball, 5...Top IJt, 6.
...Central slit, 7, song, bottom slit, 1
1... Antibacterial plate, 12... Cam plate, 13
゜33...Descent control structure, 15...Curved bullet repellent member,
19°39... Repulsion mechanism.

Claims (1)

[Claims] 1. It consists of an L-shaped tube through which balls can pass, a descending control mechanism that lowers the balls one by one at predetermined time intervals, and a springing mechanism that bounces the balls, and is carved into the vertical tube part of the above-mentioned L-shaped tube. The lowering control mechanism is configured to lower the ball to the bent portion of the bow-shaped tube by means of a control plate and a cam plate that rotate in the upper and center slits provided, and a lowering control mechanism carved in the bent portion of the bow-shaped tube. The bullet is configured to make a sudden turn of the spring member that is synchronized with the cam plate into the lower slit, and spring the ball waiting in the bent part of the bow-shaped tube toward the distal end of the horizontal tube portion of the bow-shaped tube. A delivery device for a robot machine for table tennis practice, characterized in that it is equipped with a delivery mechanism.