Safe foothold apparatus for platform

A safety footboard apparatus for a platform, wherein the safety footboard apparatus is installed to the platform to be capable of protruding to reduce a separation distance between a train and the platform, the safety footboard apparatus comprising:

• a base frame installed to the platform, wherein an accommodation space is formed inside the base frame;
• an operation arm, wherein one end portion of the operation arm is mounted inside the base frame rotatably around a vertical rotation axis;
• a footboard plate rotatably coupled to an other end portion of the operation arm so that the footboard plate is movable along a curved rotation path in a direction of being protruded or retracted from the base frame according to rotation of the operation arm;
• a rotatable link plate, wherein both end portions of the rotatable link plate are rotatably coupled to the base frame and the footboard plate, respectively, such that the rotatable link plate supports and guides the footboard plate;
• and
• an actuator comprising:
• a drive motor, and
• a power transfer means having an input portion connected to a motor axis of the drive motor and an output portion coupled to the operation arm so that the power transfer means performs rotation to transfer driving force of the drive motor to the operation arm, wherein when external force is input through the output portion, a rotation stop state is maintained not to perform power transfer,
• wherein:
• a driving wheel is coupled to the rotation axis of the operation arm to be connected to the output portion of the power transfer means,
• the operation arm and the driving wheel are arranged to be mutually frictionally contacted through a frictional contact module,
• if the driving force of the drive motor is transferred to the driving wheel through the power transfer means, the driving wheel and the operation arm rotate simultaneously by mutual frictional force to protrude or retract the footboard plate,
• if the external force greater than or equal to a reference number is applied to the footboard plate in a state in which the footboard plate is protruded, the operation arm rotates by counteracting frictional force with the driving wheel in a state in which rotation of the driving wheel is restrained by the power transfer means, and the footboard plate is retracted;
• the safety footboard apparatus further comprising:
• a footboard holder device configured to restrain movement of the footboard plate by electric magnetic force in a state in which the footboard plate is protruded and retracted.

A safety footboard apparatus for a platform, wherein the safety footboard apparatus is installed to the platform to be capable of protruding to reduce a separation distance between a train and the platform, the safety footboard apparatus comprising:

• a base frame installed to the platform, wherein an accommodation space is formed inside the base frame;
• an operation arm, wherein one end portion of the operation arm is mounted inside the base frame rotatably around a vertical rotation axis;
• a footboard plate rotatably coupled to an other end portion of the operation arm so that the footboard plate is movable along a curved rotation path in a direction of being protruded or retracted from the base frame according to rotation of the operation arm;
• a rotatable link plate, wherein both end portions of the rotatable link plate are rotatably coupled to the base frame and the footboard plate, respectively, such that the rotatable link plate supports and guides the footboard plate;
• and
• an actuator comprising:
• a drive motor, and
• a power transfer means having an input portion connected to a motor axis of the drive motor and an output portion coupled to the operation arm so that the power transfer means performs rotation to transfer driving force of the drive motor to the operation arm, wherein when external force is input through the output portion, a rotation stop state is maintained not to perform power transfer,
• wherein:
• a driving wheel is coupled to the rotation axis of the operation arm to be connected to the output portion of the power transfer means,
• the operation arm and the driving wheel are arranged to be mutually frictionally contacted through a frictional contact module,
• if the driving force of the drive motor is transferred to the driving wheel through the power transfer means, the driving wheel and the operation arm rotate simultaneously by mutual frictional force to protrude or retract the footboard plate,
• if the external force greater than or equal to a reference number is applied to the footboard plate in a state in which the footboard plate is protruded, the operation arm rotates by counteracting frictional force with the driving wheel in a state in which rotation of the driving wheel is restrained by the power transfer means, and the footboard plate is retracted;
• wherein a distance measurement sensor configured to measure a protruded distance of the footboard plate is mounted to the base frame.

A safety footboard apparatus for a platform, wherein the safety footboard apparatus is installed to the platform to be capable of protruding to reduce a separation distance between a train and the platform, the safety footboard apparatus comprising:

• a base frame installed to the platform, wherein an accommodation space is formed inside the base frame;
• an operation arm, wherein one end portion of the operation arm is mounted inside the base frame rotatably around a vertical rotation axis;
• a footboard plate rotatably coupled to an other end portion of the operation arm so that the footboard plate is movable along a curved rotation path in a direction of being protruded or retracted from the base frame according to rotation of the operation arm;
• a rotatable link plate, wherein both end portions of the rotatable link plate are rotatably coupled to the base frame and the footboard plate, respectively, such that the rotatable link plate supports and guides the footboard plate;
• and
• an actuator comprising:
• a drive motor, and
• a power transfer means having an input portion connected to a motor axis of the drive motor and an output portion coupled to the operation arm so that the power transfer means performs rotation to transfer driving force of the drive motor to the operation arm, wherein when external force is input through the output portion, a rotation stop state is maintained not to perform power transfer,
• wherein:
• a driving wheel is coupled to the rotation axis of the operation arm to be connected to the output portion of the power transfer means,
• the operation arm and the driving wheel are arranged to be mutually frictionally contacted through a frictional contact module,
• if the driving force of the drive motor is transferred to the driving wheel through the power transfer means, the driving wheel and the operation arm rotate simultaneously by mutual frictional force to protrude or retract the footboard plate,
• if the external force greater than or equal to a reference number is applied to the footboard plate in a state in which the footboard plate is protruded, the operation arm rotates by counteracting frictional force with the driving wheel in a state in which rotation of the driving wheel is restrained by the power transfer means, and the footboard plate is retracted;
• wherein:
• a protrusion detection sensor and a retraction detection sensor configured to detect a protrusion state and a retraction state of the footboard plate are mounted to the base frame,
• the protrusion detection sensor is configured to be activated by being pressed by a detection bracket coupled to one side of the rotatable link plate in a state in which the footboard plate is completely protruded,
• the retraction detection sensor is configured to be activated by being pressed by a side surface of the rotatable link plate in a state in which the footboard plate is completely retracted, and
• the detection bracket is movably coupled to one side surface of the rotatable link plate.