CN-117466099-B - Working method of door knife

CN117466099BCN 117466099 BCN117466099 BCN 117466099BCN-117466099-B

Abstract

When the elevator is dropped, the safety tongs of the elevator work to brake the elevator, the door knife moves to drop the gate ball to contact, in the power-on state, the door motor drives the door knife to open the door lock, the door is opened, in the power-off state, the door is pulled in the elevator, the door knife opens the door lock, and the door and the landing door are opened.

Inventors

LI JUNKAI
ZENG SHANSHAN
DENG HUAZHEN
ZHU HUARONG

Assignees

浙江智菱科技有限公司

Dates

Publication Date: 20260505
Application Date: 20230906

Claims (9)

1. The working method of the door knife is characterized in that the elevator is dropped in fault, and after the elevator safety tongs brake the elevator to stop suddenly, the method comprises the following three operation modes: S1, when the stop position of the elevator car is at a landing door position, a blade body of a door blade is contacted with a door ball, a door motor drives the door blade to open a car door lock under the power-on state, the car door is opened, the door is pulled in the elevator car under the power-off state, the door blade opens the car door lock, and the car door and the landing door are opened; S2, when the elevator car stops at a landing door position but the car and a flat landing position are at a non-safe height, the car body of the door knife is not contacted with the gate ball, and the car door cannot be opened; S3, when the elevator car stops at a landing door position but the elevator car and the landing position are at a safe height, when the elevator falls down, a safety tongs of the elevator works to brake the elevator, a door knife moves to descend a door ball to contact, a door motor drives a door knife to open a car door lock in an electrified state, the car door is opened, the door is pulled in the elevator car in an outage state, the door knife opens the car door lock, the car door and the landing door are opened, and the descending maximum stroke of the door knife is smaller than or equal to the safe height; In S3, a door frame is arranged on a lift car, two ends of a mounting plate are fixed on sliding rail pieces at the outermost sides of a sliding device, a door knife rest is provided with a first connecting shaft and a second connecting shaft, a lift car door hanging plate is arranged on the door frame in a sliding mode, the mounting plate is provided with a transverse first sliding groove, the lift car door hanging plate is provided with a longitudinal second sliding groove, the first connecting shaft is adapted to slide in the first sliding groove, the second connecting shaft is adapted to slide on the second sliding groove, the sliding device is provided with a first driving lock, the sliding device is provided with a hook arm, the hook arm is hinged in an arm groove of the sliding rail at the outermost sides and is connected with a torsion spring for resetting, an initial position is arranged in the arm groove, the resetting position is 90 degrees with the initial position, the initial position is locked through the second driving lock, the reset position is locked through the third driving lock, the hook ring matched with the hook arm is arranged at the front end adaptive position of the lift car, when the lift drops, the safety tongs of the lift work to brake the lift, the first driving lock is unlocked, the door knife falls along with the mounting plate, the second driving lock is unlocked, the hook arm resets to be in contact with the groove contact hook and is locked through the third driving lock, the knife body of the door knife is contacted with the door ball, the door motor drives the door knife to open the lift car door lock under the power-on state, the lift car door is opened, the door is pulled down in the lift car under the power-off condition, the lift car door lock is opened by the door knife, the lift car door and the landing door are opened, and the maximum sliding travel of the sliding device is smaller than or equal to the safety height.
2. The method of claim 1, wherein the first drive lock is unlocked when the elevator is in a falling fault, the sliding device is provided with a secondary unlocking device, the secondary unlocking device is unlocked when the elevator is in a falling fault and the safety gear is stopped when the elevator is in a falling fault, and the sliding device slides down at the moment, and the second drive lock is unlocked, so that the hook arm is matched with the hook ring to be hooked.
3. The method of claim 1, wherein the sliding device comprises three sliding rails, the first driving lock is unlocked and comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve, the second sleeve and the third sleeve are sequentially and slidably sleeved, the cavities of the first sleeve, the second sleeve and the third sleeve are communicated and are provided with reset spring pieces, one end of the traction rope is connected with the first sleeve, and the traction rope is fixed with the elevator speed limiting rope through a plurality of guide wheels and is fixed at the fixed end of the traction rope.
4. The method of claim 1, wherein the sliding device comprises a first sliding rail member, a second sliding rail member and a third sliding rail member, the first sliding rail member and the second sliding rail member are respectively provided with a pulley groove, and the second sliding rail member and the third sliding rail member are provided with rubber pulleys at the adaptive positions to form damping sliding in an adaptive manner.
5. The method of claim 1, wherein a check mechanism is disposed between adjacent rail members of the sliding device in an adaptive manner, the check direction is upward check, the check mechanism comprises a check hook and check teeth, the check hook is hinged to the outer rail member, and the plurality of check teeth are disposed on the adjacent inner rail member.
6. The method of claim 2, wherein the auxiliary unlocking device comprises a fixing seat, rollers, a pinch roller, a fixing belt, a guide wheel, a fixing device and a fixing rope, wherein the rollers, the pinch roller and the guide wheel are arranged on the fixing seat in a rotating way, the rollers are arranged opposite to the pinch roller and are arranged on an elevator speed limiting rope in an adapting way, the pinch roller is provided with a protruding part and is matched with two side wheel surfaces of the guide wheel, the pinch roller is provided with a torsion spring to enable an initial state to be separated from the guide wheel surfaces, the fixing rope is fixed with the fixing device through wheel grooves of the guide wheel, the fixing belt is fixed with the fixing device through two side wheel surfaces of the guide wheel, the fixing device is fixed with the elevator speed limiting rope at a corresponding position, the fixing seat is fixed with a car, the second driving lock is L-shaped, one end of the second driving lock is fixed with a head end of a sliding rail piece at the head end of the second driving lock, the other end of the second driving lock is inserted and is longitudinally inserted and matched with an initial position state of the hook arm in a sliding way, and the fixing belt is fixed with the second rope through a first connecting rope and a second rope.
7. The method of claim 6, wherein the strap and cable are attached to a clip on the holder.
8. A method of constructing a door knife according to claim 6, wherein: the fixing belt and the fixing rope have elasticity.
9. A method of constructing a door knife according to claim 3 wherein the first sleeve is retained and magnetically attracted to the bottom of the cavity of the second sleeve and the second sleeve is retained and magnetically attracted to the bottom of the cavity of the third sleeve.

Description

Working method of door knife Technical Field The invention relates to the field of elevator manufacturing, in particular to a working method of a door knife. Background The elevator door machine is a mechanism for opening and closing elevator hall car door, when the elevator door machine is subjected to elevator door opening and closing signals, the elevator door machine controls the door opening motor through a self-contained control system to convert the moment generated by the motor into a force in a specific direction to close or open the door. When the door closing preventing force is larger than n, the door machine automatically stops closing the door and reversely opens the door to play a role in protecting the door from being closed to a certain extent. In order to reduce elevator accidents, elevator door machine often is provided with anti-theft door parts, general elevator manufacturers can be provided with elevator door opening stoppers, mechanical lock hooks prohibit opening doors in non-flat areas, passengers are prevented from maliciously taking off the doors, the passengers fall off when jumping out, in the falling accident process of the elevator, due to the action of the anti-theft parts of the elevator, the elevator stop points often are not in the flat areas, however, in the accident, in proper drop positions, namely when elevator car floors and flat threshold drops are smaller, if the elevator car doors and the landing doors can be taken off when faults occur, passengers in the elevator can carry out rapid self rescue, the rescue time can be reduced, and the occurrence of secondary accidents can be avoided. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide a working method of a door knife after elevator fault braking stops under the safety of exiting the elevator car. The technical scheme adopted by the invention for solving the problems is that the working method of the door knife comprises the following three operation modes after the elevator fault is dropped and the elevator safety tongs brake the elevator to stop suddenly: S1, when the stop position of the elevator car is at a landing door position, a blade body of a door blade is contacted with a door ball, a door motor drives the door blade to open a car door lock under the power-on state, the car door is opened, the door is pulled in the elevator car under the power-off state, the door blade opens the car door lock, and the car door and the landing door are opened; S2, when the elevator car stops at a landing door position but the car and a flat landing position are at a non-safe height, the car body of the door knife is not contacted with the gate ball, and the car door cannot be opened; And S3, when the elevator car stops at a landing door position but the elevator car and the landing position are at a safe height, when the elevator falls down, the elevator is braked by the safety tongs of the elevator, the door knife moves to descend to make contact with the door ball, the door motor drives the door knife to open the car door lock in the electrified state, the car door is opened, the door is pulled in the elevator car in the outage state, the door knife opens the car door lock, the car door and the landing door are opened, and the descending maximum stroke of the door knife is smaller than or equal to the safe height. In S3, a door plate is arranged on a lift car, two ends of a mounting plate are fixed on a sliding rail piece at the outermost side of a sliding device, a door knife rest is provided with a first connecting shaft and a second connecting shaft, a lift car door hanging plate is arranged on the door plate in a sliding mode, the mounting plate is provided with a first transverse sliding groove, the lift car door hanging plate is provided with a second longitudinal sliding groove, the first connecting shaft is adapted to slide in the first sliding groove, the second connecting shaft is adapted to slide on the second sliding groove, the sliding device is provided with a first driving lock, the sliding device is provided with a hook arm, the hook arm is hinged in an arm groove of the sliding rail at the outermost side and is connected with a torsion spring for resetting, an initial position is arranged in the arm groove, the reset position is 90 DEG with the initial position, the initial position is locked through a second driving lock, the reset position is locked through a third driving lock, a hook ring matched with the hook arm is arranged at the front end of the lift car, when the lift car falls down, a safety tongs of the lift car is in operation, the lift car is braked, the first driving lock is in a falling state, the door lock is in a sliding state, and the door lock is in contact with the lift car door lock is in a sliding state, and the door lock is in a sliding state. Further, after the elevator falls down to malfunction, the first driving lock is unlocked, the s