Cup dispenser for a beverage vending machine

1. A cup dispenser for a beverage vending machine, the cup dispenser comprising:

a magazine rotatably mounted about a rotation axis and provided with a plurality of columns arranged around the rotation axis, each of the plurality of columns is adapted to store a respective stack of cups and is provided with a respective release device operable to dispense individual ones of the cups;

a first actuator operable to rotate the magazine about the rotation axis and selectively bring the plurality of columns in a fixed cup dispensing station;

a second actuator operable to operate the release device of a respective one of the plurality of columns in the fixed cup dispensing station;

a power takeoff powered by the second actuator; and

a third actuator operable to selectively move the power takeoff to and from an engagement position, in which the power takeoff is kinematically coupled with a power input of the respective release device in the fixed cup dispensing station.

2. The cup dispenser of claim 1 , wherein the power takeoff is adapted to move between a disengagement position in which the power takeoff fails to interfere with the release devices when the release devices pass through the fixed cup dispensing station during the rotation of the magazine, and the engagement position in which the power takeoff is coupled with the power input of the release device of one of the plurality of the columns containing the cups to be extracted.

3. The cup dispenser of claim 2 , wherein the power takeoff is moved to and retained in the engagement position only for the time necessary for dispensing the cup.

4. The cup dispenser of claim 1 , wherein:

each of the release devices includes a plurality of release elements and a respective transmission having an input that defines the power input and having a gear, the gear including a central part that defines a hub; and

the power takeoff is defined by a pin configured to fit into the hub to result in the pin being angularly coupled with said gear.

5. The cup dispenser of claim 4 , wherein the pin includes a conical fitting end having a grooved profile.

6. The cup dispenser of claim 5 , wherein the second actuator is operable to rotate the pin and operate the release devices.

7. The cup dispenser of claim 5 , wherein the first, second and third actuators are mounted to form a compact actuator assembly housed in a box-shaped casing arranged below the magazine.

8. The cup dispenser of claim 7 , further comprising:

an optical sensor mounted to the compact actuator assembly; and

an electronic control unit connected to the optical sensor and configured to detect, based on an output of the optical sensor, a presence or an absence of the cups one of the plurality of columns the latter stops or runs through the fixed cup dispensing station, and to consequently control rotation of the magazine if no cup is in the column at the fixed cup dispensing station.

9. The cup dispenser of claim 7 , wherein the third actuator includes a linear actuator and is adapted to move the pin between a lowered position defining the disengagement position, and a raised position defining the engagement position in which the pin axially fits into the hub.

10. The cup dispenser of claim 9 , further comprising:

wherein the third actuator includes a solenoid actuator;

a rocker arm transmission is arranged between a linear output member of the third actuator and the pin to move the pin from a normal position thereof when the third actuator is activated; and

elastic return means operable to move the pin back into the normal position when the third actuator is deactivated.