COFFEE GRINDING MACHINE WITH IMPROVED CONTAINER CONNECTION AND OPENING / CLOSING DEVICE

Claims

1. A coffee grinding machine (1) comprising a container (2) for storing coffee beans to be ground and a connection seat (15) configured to connect the container to the coffee grinding machine (1), wherein the container (2) comprises an outlet opening (2B) and a device (20) for closing and opening the outlet opening, wherein the device (20) for closing and opening the outlet opening comprises a fixed element (30) that is substantially integral with the container (2) and a movable shutter element (40, 50) with a manual control element (46) for moving the shutter element to an open or closed position, wherein the manual control element (46) is configured to interact with the connection seat (15, 151) and / or with the fixed part (30, 36) for closing the movable shutter element (40, 50),while the container (2) is rotated in the first direction to detach it from the seat (15) for connection, 2. The coffee grinding machine (1) according to claim 1, wherein the shutter element comprises a plurality of shutter tongues (50) movable between a first position and a second position, wherein the opening (33) in the lower part of the fixed part (30) is closed and prevents the passage of coffee beans into the grinding group (3) of the coffee grinding machine (1).

3. A machine (1) for grinding coffee according to claim 2, in which the shutter element comprises a movable part (40) designed with the possibility of performing a rotational movement relative to the fixed part and moving the tongues (50) from the first position to the second position and vice versa.

4. A machine (1) for grinding coffee according to any of the preceding claims, in which the manual control element (46) is a control lever (46) formed in one piece with the movable part (40) of the damper element.

5. The coffee grinding machine (1) according to claim 4, in which the seat (151) for connection comprises a first stop (151a) and a second stop (151b) for limiting the rotational movement of the control lever (46) and forcing the control lever (46) to position the tongues in the closed position.

6. The coffee grinding machine (1) according to claim 4 or 5, in which, while the container (2) rotates in the first direction to remove it from the connection with the seat (15) for connection, the second stop (151b) and the control lever (46) remain in mutual contact to bring the tongues (50) of the shutter to the closed position.

7. A coffee grinding machine (1) according to any of the preceding claims, further comprising a safety on / off system that prevents the coffee grinding machine from operating when the container (2) is not connected correctly.

8. A machine (1) for grinding coffee according to claim 7, in which the system comprises a safety reed switch (60) and a corresponding activating magnet (61) of the reed switch, wherein the activating magnet of the reed switch is made integral with the fixed part (30) of the device (20), and the reed switch (60) is made integral with the machine (1).

9. A machine (1) for grinding coffee according to any one of claims 2 to 8, in which each of the tongues (50) of the shutter essentially has a triangular shape with a base and a apex.

10. The coffee grinding machine (1) according to claim 9, wherein each of the flap tongues (50) comprises a first downwardly facing protruding pivot pin (54) which is located substantially at one end of the side of each flap tongue (50), wherein each of the flap tongues (50) is pivotally connected to the fixed element (30) by means of a corresponding pivot pin (54) which interacts with a corresponding opening (34) in the lower part (32) of the fixed element (30).

11. A machine (1) for grinding coffee according to claim 9 or 10, in which each of the tongues (50) of the shutter comprises a second cam pin (59), wherein the second cam pin (59) is located essentially in an intermediate position of the base of each tongue (50) of the shutter, wherein each of the cam pins (59) is designed with the possibility of interacting with a groove (49) of a movable element (40) of the shutter.

12. A machine (1) for grinding coffee according to any of the preceding claims, in which the fixed element (30) comprises teeth (37) protruding radially from the side surface (35) of said fixed element, wherein the seat (15, 151) for connection comprises longitudinal grooves (157) designed with the possibility of interaction with the teeth (37), wherein the connection between the radially protruding teeth (37) and the grooves (157) determines the position of installation and removal of the container relative to the seat (15) during installation.

13. In a coffee grinding machine (1), a method for detaching a container (2) from a seat for detaching a container of the coffee grinding machine (1), wherein the container (2) comprises an outlet (2B) and a device (20) for closing and opening the outlet, wherein the device (20) for closing and opening the outlet comprises a fixed element (30) that is substantially integral with the container (2), and a movable shutter element (40, 50) with a manual control element (46) for moving the shutter element (30) to an open or closed position, wherein the manual control element (46) is configured to interact with the seat (15, 151) for connection and / or with the fixed part (30, 36), wherein if the shutter element (40, 50) is in the open position, the method includes the step of rotating the container (2) in the first direction so that the manual control element (46) the control remains in such contact with the seat (15, 151) for connection,that when the container (2) rotates, the movable element (40, 50) of the shutter rotates relative to the container and closes the outlet opening., 14. The method according to claim 13, wherein the manual control element (46) is a control lever (46) made in one piece with the movable part (40) of the shutter element, wherein the seat for connection comprises a window (151) with a first stop (151a) and a second stop (151b) for limiting the movement of the control lever (46), wherein the step of rotating the container (2) in the first direction includes the step of rotating the container (2) in such a way that the control lever (46) remains opposite the second stop (151b) in order to close the outlet opening of the container during its rotation.