Patent ID: 11931849
Assignee: HUVITZ CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A blocking device (100) comprising:
a blocking device housing (41) having a guide (31) formed therein;
a leap block attachment part (21) mounted to be movable up and down on the guide (31) of the blocking device housing (41);
a spring (61) having a lower end that supports the leap block attachment part (21) and an upper end that supports the blocking device housing (41), the spring (61) pushing the leap block attachment part (21) downward by an elastic force, so that a lower end of the leap block attachment part (21) protrudes below a lower end of the blocking device housing (41);
a wire (11) having one end connected to a pulley (15) driven by driving means (93) and the other end connected to the leap block attachment part (21), the wire (11) pulling the leap block attachment part (21) upward when the pulley (15) rotates;
a leap block (51) attached to the lower end of the leap block attachment part (21) by an attractive force of magnets; and
a blocking arm (71) coupled to the blocking device housing (41) and configured to move the blocking device housing (41) up and down.