JPH032307Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an automatic mahjong table, and more particularly to a drive device for a posture control roller that adjusts tiles dropped from a table into a predetermined posture.

An automatic mahjong table that automatically mixes the tiles, controls their posture, and stacks them on the tabletop automatically handles each tile dropped from the tabletop onto the turntable by the centrifugal force caused by the rotation of the turntable and the centrifugal force generated by the rotation of the turntable. A posture control roller that rotates in reverse on the upper surface of the periphery of the turntable mixes the mixture and adjusts it to a predetermined posture, and then,
By sequentially feeding these tiles into the posture correction device and the stacking device, all the tiles are stacked face down on the tabletop in two tiers. If each rotation is made by a different drive source (motor),
The configuration of the drive unit becomes complicated, making the entire device more expensive, and the rotational speed of the turntable and the attitude control roller must be controlled to a predetermined speed, which leads to problems such as complicated operation. Ta.

Therefore, the purpose of the present invention is to enable the posture control rollers to be driven and rotated by a single drive source for the turntable, thereby greatly simplifying the structure of the drive unit and improving the overall performance of the automatic mahjong table. An object of the present invention is to provide a driving device for a posture control roller in an automatic mahjong table, which is devised so as to reduce the manufacturing cost and simplify the operation.

In order to achieve the above-mentioned object, the present invention has a guide groove formed in the upper surface of the peripheral part of the turntable, which has the same trajectory as the cycloid curve drawn by the guide pin protruding from the bottom surface of the attitude control roller. By fitting the above-mentioned guide pin, the attitude control roller is configured to rotate in the opposite direction as the turntable rotates.

Next, the present invention will be explained with reference to the accompanying drawings.

In the drawings, reference numeral 1 denotes a turntable having a generally conical shape, and in FIG. Indicates the axis of rotation.
In Figures 1 and 2, 3 is a hopper attached to the bottom side of a tabletop (not shown), and the turntable 1 rotates within this hopper 3, and when the tabletop is opened, The tiles P dropped onto the turntable 1 are moved toward the peripheral portion 1a by the centrifugal force of the rotating turntable 1.

Also, in FIGS. 1 and 2, the reference numeral 4 indicates an attitude control roller disposed on the upper surface of the periphery of the turntable 1.
Although only one posture control roller 4 is shown, in reality, they are arranged at four positions on the upper surface of the periphery of the turntable 1 at equal intervals. This posture control roller 4, which is made entirely in a substantially cylindrical shape, has two upper and lower roller members 4 made of rubber or a material with the same effect as rubber.
a, 4b, and the circumferential surface of each roller member 4a, 4b has several vertical grooves 4a, respectively.
1 and 4b1 are recessed at intervals. Further, first, second, and third guide pins 5, 6, and 7 are vertically provided at equal intervals on the outer peripheral edge of the bottom surface of the lower roller member 4b.

In FIG. 2, reference numeral 8 denotes a column fixed to the outer wall of the hopper 3, and a roller support arm 9 is horizontally attached to the upper end of the column 8 so as to face inside the hopper 3. Reference numeral 10 denotes a bearing boss fixed to the tip of the support arm 9, and a roller shaft 11 is attached to the bearing boss 10 so as to face the upper surface of the periphery of the turntable 1. 10a is a mounting shaft for mounting the upper end of the roller shaft 11 into the bearing boss 10, and the shaft hole 1 of the roller shaft 11 is inserted through the mounting shaft 10a.
By forming 1a into a vertically elongated hole, the entire roller shaft 11 is mounted so as to be movable up and down, and
A resilient spring 13 interposed between a sleeve 12 attached to the middle of the roller shaft 11 and the bearing boss 10 constantly urges the roller shaft downward.

The above-mentioned attitude control roller 4 is rotatably attached to the lower end of the roller shaft 11 having the above-mentioned structure via bearings 14. Next, the structure for rotating the attitude control roller 4 will be explained.

In Figures 1 to 3, 15, 16, 17
are first, second, and third guide grooves recessed on the peripheral portion 1a of the turntable 1;
5, 16, and 17 rotate the turntable 1 in the clockwise direction in the drawing, and the attitude control roller 4
is formed in the same locus as a cycloid curve drawn by each of the first, second, and third guide pins 5, 6, and 7 when rotated counterclockwise,
By fitting each guide pin 5, 6, 7 into each of these guide grooves 15, 16, 17, it is possible to rotate the posture control roller 4 in a reverse direction in conjunction with the forward rotation of the turntable 1. .

Since the posture control roller drive device according to the present invention has the configuration described above, when the turntable 1 is rotated by the motor in the clockwise direction (arrow R direction) in the drawing, each guide pin 5, 6, 7 moves along the guide grooves 15, 16, and 17, and thereby the posture control roller 4 can be rotated in the counterclockwise rotation direction (direction of arrow L) in the drawings around the roller shaft 11. In particular, at least 2
Since the posture control roller 4 is rotated by the engagement of the plurality of guide pins 5, 6, 7 with the guide grooves 15, 16, 17 of the cycloid curve, any one of the guide pins is connected to the peak of the cycloid curve. That is, even if it is locked to 15a, 16a, 17a, the other guide pins move along the guide grooves and forcibly release the lock, so the posture control roller 4 always rotates smoothly. Each tile P, which is moved toward the peripheral portion 1a by the centrifugal force caused by the rotation of the turntable 1, can be arranged in a predetermined posture. That is, according to the posture control roller 4 shown in the figure, only the tiles P facing in the longitudinal direction are allowed to pass between the inner wall surface of the hopper 3 and each tile P in a sideways or standing state is
Then, by adjusting the tiles P so that they are oriented in the longitudinal direction, or by flipping them toward the center of the turntable 1 and causing them to fall over, by repeating this action, he finally arranges all the tiles P so that they are facing in the longitudinal direction. It can be sent to the next posture forcing device. In addition, when rotating the posture control roller 4, each guide groove 15, 1
Since the fitting state of each guide pin 5, 6, 7 into the inside of 6, 17 is elastically maintained by the elastic spring 13,
There is no fear that the rotation of the posture control roller 4 will be interrupted midway due to the rotation of the posture control roller 4 being dislodged.

In addition, in FIG. 2, 4a2 is a flange piece formed on the upper end surface of the upper roller member 4a, and this is for tipping over the standing tiles P, but this flange piece 4a2 is not provided. However, it goes without saying that the vertical grooves 4a1 and 4b1 of the posture control roller 4, which is formed into a substantially cylindrical shape as shown in FIG. 1, can overturn the standing tiles P.

As explained above, according to the attitude control roller drive device according to the present invention, the attitude control roller is reversely rotated by the guide groove in conjunction with the rotation of the turntable. Drive mechanisms such as belts and gears are not required at all, and only the drive mechanism for the turntable is required, which greatly simplifies the configuration of the drive unit and reduces manufacturing costs.
Since the attitude control roller rotates in synchronization with the rotation of the turntable, there is no need to adjust the rotation speed of the attitude control roller, and constant stirring (mixing) is achieved at all times.
It can perform a functional alignment function, and combined with the fact that it is simple in structure and easy to implement, its practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of the present invention, FIG. 2 is a side sectional view of another embodiment of the present invention, and FIG. 3 is a plan view of a turntable used in the present invention. 1... Turntable, 1a... Peripheral part, 4...
...Attitude control roller, 5, 6, 7...Guide pin,
11... Roller shaft, 15, 16, 17... Cycloid curve guide groove recessed on the upper surface of the peripheral portion of the turntable.

Claims (1)

[Scope of utility model registration request] A roller shaft is suspended toward the upper surface of the periphery of the turntable configured to be freely rotatable, and a posture control roller having at least two or more guide pins protruding from the bottom surface is rotatably attached to the roller shaft, and
A guide groove having the same locus as a cycloid curve drawn by each of the guide pins by mutual rotation of the turntable and the attitude control roller is recessed on the upper surface of the peripheral part of the turntable, and each of the above-mentioned A drive device for a posture control roller in an automatic mahjong table, which has a configuration in which a guide pin is fitted and rotates the posture control roller in reverse according to the rotation of a turntable.