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

Claim 7:
8. 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 to support the ratchet part; 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 rotation limiting part includes:
a pawl rotatably mounted on the support part;
a connection part of which one end portion is coupled with the pawl; and
a driving part with which the other end portion of the connection part is coupled, and, which moves the connection part forwards when the detection sensor senses overspeed or reverse rotation,
wherein the connection part includes:
an extension part of which one end portion is connected with the pawl;
a connection bar of which one end portion is connected with the other end portion of the extension part;
a connection plate with which the other end portion of the connection bar is coupled; and
a driving bar of which both end portions are respectively coupled to the connection plate and the driving part, and
wherein the extension part extends the connection part so that the pawl is perfectly inserted into the ratchet wheel when the pawl is inserted into the ratchet wheel.