Patent ID: 11891273
Assignee: TAESUNG ESCALATOR CO., LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. An overspeed and reverse drive preventing device for an escalator comprising:
a ratchet part including a ratchet wheel rotatably mounted on an escalator rotary shaft, and friction parts mounted at both sides of the ratchet wheel to be in frictional contact with the ratchet wheel and coupled with the rotary shaft to be rotated together with the rotary shaft;
a detection sensor for sensing rotation of the rotary shaft;
a support frame which is a structure installed inside the escalator to support another object;
a support part mounted on the support frame; and
a rotation limiting part mounted on the support part in order to limit the rotation of the ratchet wheel when a retaining part is inserted into the ratchet wheel,
wherein the support part includes:
a supporter coupled with the support frame; and
a frictionally movable body of which one side is coupled with the supporter and which is mounted to be spaced apart from the rotary shaft, and
wherein when the detection sensor senses overspeed or reverse rotation of the rotary shaft, the retaining part of the rotation limiting part is inserted into the ratchet wheel and is pressed by rotational force of the ratchet wheel to move the frictionally movable body rearwards, so that the frictionally movable body comes into contact with the outer peripheral surface of the ratchet part so as to generate friction.