A bidirectional blocking device for a lifting platform of an automated storage and retrieval system, wherein the device comprises a high-bay rack (1), a lifting platform (2), a travel rail, and a shuttle (6), wherein the high-bay rack (1) is provided with a plurality of groups of shutter arrival rails (5) from bottom to top at equal spacings;
- the lifting platform (2) is able to rise and fall to be docked with the layers of shuttle entry rails (5);
- in a docking state, the shuttle (6) is able to travel onto the lifting platform (2) from the shuttle entry rails (5) and is able to travel onto the shuttle entry rails (5) from the lifting platform (2);
- an A-mounting beam (7) is arranged on one side of the lifting platform (2) close to the high-bay rack (1);
- a B-mounting beam (8) is arranged on a lower part of one side, close to the lifting platform (2), of each shuttle entry rail (5);
- an A-unit (3) and a B-unit (4) are mounted on the A-mounting beam (7);
- an A-unit (3) and a B-unit (4) are mounted on the B-mounting beam (8);
- the A-unit (3) on the A-mounting beam (7) cooperates with the B-unit (4) on the B-mounting beam (8);
- the A-unit (3) on the B-mounting beam (8) cooperates with the B-unit (4) on the A-mounting beam (7);
- when the A-units (3) and the B-units (4) that cooperate with each other are staggered in height, the A-unit (3) on the A-mounting beam (7) prevents the shuttle (6) from horizontally sliding out on the lifting platform (2), and the A-unit (3) on the B-mounting beam (8) prevents the shuttle (6) from horizontally sliding out on the shuttle entry rail (5);
- when the A-units (3) and the B-units (4) that cooperate with each other overlap in height, the B-units (4) drive the cooperating A-units (3) to act to disable a function of preventing the shuttle (6) from sliding out;
- the lifting platform (2) is provided with a transition rail (26);
- the transition rail (26) is able to be docked with each shuttle entry rail (5);
- in the docking state, a travel surface of the shuttle entry rail (5) and a travel surface of the transition rail (26) are coplanar;
- each A-unit (3) comprises a fixed base (9) and a vertically asymmetric rotating main body (10);
- a bearing (19) is disposed on the fixed base (9);
- the rotating main body (10) is in rotatable fit with the fixed base (9) through the bearing (19), and a centroid of the rotating main body (10) is located below the bearing (19);
- when the A-unit (3) and the B-unit (4) that cooperate with each other are staggered in height, the rotating main body (10) always remains vertically upward;
- magnets (18) are arranged on one sides, close to each other, of the fixed base (9) and the rotating main body (10) of the A-unit (3);
- after a driving block (16) of the B-unit (4) is separated from a collision block (11) on the rotating main body (10), an attractive force between the two magnets (18) prevents the rotating main body (10) from swinging under an inertia action;
- a rotating shaft (20) is vertically disposed on the fixed base (9);
- the bearing (19) on the rotating main body (10) is coaxially slidably sleeved on the rotating shaft (20);
- the rotating main body (10) is able to adjust a mutual attractive force between the two magnets (18) by sliding of the bearing (19) in a length direction of the rotating shaft (20);
- an axial limiting plate (21) is sleeved on the rotating shaft (20);
- the axial limiting plate (21) is located between the fixed base (9) and the rotating main body (10), and a limiting surface of the axial limiting plate (21) is always in contact with one side of the rotating main body (10) close to the fixed base (9);
- an electric telescopic rod (25) is arranged on the fixed base (9) and corresponds to the axial limiting plate (21);
- a telescopic end of the electric telescopic rod (25) is fixedly connected to one side of the axial limiting plate (21) away from the rotating main body (10);
- a gravity sensor is disposed on the transition rail (26) of the lifting platform (2);
- the gravity sensor is able to identify a weight of a load on the transition rail (26) and is in signal linkage with the electric telescopic rod (25);
- the gravity sensor is configured with no-load data, first gravity data, and second gravity data that respectively correspond to three cases:
- the lifting platform (2) is in a no-load state, the lifting platform (2) carries the shuttle (6) that does not transport goods, and the lifting platform (2) carries the shuttle (6) that transports goods;
- and after the gravity sensor detects any of the foregoing data, the telescopic end of the electric telescopic rod (25) extends to a corresponding length.