Secondary protection mechanism for emergency unlocking of elevator landing door

Abstract

The utility model relates to the technical field of elevators, and provides a secondary protection mechanism for emergency unlocking of an elevator landing door, which comprises a deflector rod arranged on the landing door, a pulling device connected to the deflector rod, a blocking piece connected to the other end of the pulling device, and an emergency unlocking device arranged on the landing door and a door frame, a limiting piece is arranged on the door frame, the driving lever rotates to drive the pulling device to pull the blocking piece to move to one side of the limiting piece, meanwhile, the driving lever can make contact with the emergency unlocking device to open the emergency unlocking device, and the landing door can be pushed to enable the blocking piece to abut against the limiting piece to prevent the landing door from being continuously opened. Secondary protection is achieved through the limiting piece and the blocking piece, only an observation opening through which a human body cannot pass can be formed when the landing door is opened for the first time, after safety is confirmed, the landing door is completely opened, falling accidents and shearing accidents are prevented from occurring, and the technical problem that after an operator opens the landing door, the falling accidents and the shearing accidents possibly occur is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a secondary protection mechanism for emergency unlocking of elevator landing doors. Background Art

[0002] The elevator landing door lock is one of the common elevator safety devices, and its function is to prevent the elevator landing door from being accidentally opened or pried open, and to prevent people from falling into the elevator shaft. However, in emergency situations such as rescue and emergency repair, it is necessary to open the landing door from the outside. Therefore, in the prior art, a triangular lock is usually configured on the door panel of the landing door, and external personnel turn the triangular lock with a key, so as to drive the unlocking rod to push open the moving hook above by using the trigger plate connected to the triangular lock, thereby realizing the separation of the moving hook and the fixed hook and completing the unlocking work. However, this kind of emergency unlocking device usually opens the landing door to the maximum at one time, and there is a risk of falling accidents and shearing accidents, which is mainly reflected in unauthorized personnel privately opening the landing door, authorized personnel opening the landing door in a fuzzy state such as being drunk, incorrect confirmation of the car position, and the requirement of using greater force to open the landing door and less force after opening, which may cause loss of balance and falling into the hoistway due to excessive initial force. Summary of the Utility Model

[0003] Therefore, in view of the above problems, the utility model provides a secondary protection mechanism for emergency unlocking of elevator landing doors, which solves the technical problems that falling accidents and shearing accidents may occur after the operator opens the landing door.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A secondary protection mechanism for emergency unlocking of elevator landing doors includes a lever arranged on the landing door, a pulling device connected to the lever, a blocking member connected to the other end of the pulling device, and an emergency unlocking device arranged on the landing door and the door frame. The blocking member is slidably arranged on the landing door, and a limiting member is arranged on the door frame. When the lever rotates, it can drive the pulling device to pull the blocking member to move to one side of the limiting member. At the same time, the lever can contact the emergency unlocking device to open the emergency unlocking device, and pushing the landing door can make the blocking member abut against the limiting member to prevent the landing door from opening further.

[0006] Furthermore:

[0007] The limiting member includes a slide rail and a spring arranged on the slide rail. When the blocking member abuts against the limiting member, the spring can be compressed.

[0008] The maximum compression amount of the spring is 15 mm.

[0009] A jack is arranged at the other end of the lever, and a key hole is arranged on the landing door. The jack and the key hole are connected by a locking member. Inserting the key into the key hole on the landing door can drive the lever to rotate.

[0010] The pulling device comprises a steel wire rope connected to the shifting rod and the blocking member.

[0011] The pulling device also includes a large pulley and a small pulley, and the steel wire rope passes through the large pulley and the small pulley.

[0012] A sliding piece is arranged on the side wall of the landing door, a sliding groove is arranged on the sliding piece, a sliding bar is slidably arranged on the sliding groove, the blocking piece is connected to the sliding bar, and the sliding bar can drive the blocking piece to move when sliding along the sliding groove.

[0013] A door hanging panel is provided at the top of the floor door. The emergency unlocking device includes a fixed hook arranged on the door frame, a movable hook rotatably arranged on the door hanging panel, and a push rod arranged on the movable hook. When the push rod is rotated, the push rod can be pushed to make the movable hook rotate upward, thereby realizing the separation of the movable hook and the fixed hook.

[0014] One end of the blocking member is bent twice to form a gate-shaped structure, and the length of one end of the blocking member is greater than the length of the other end.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model realizes secondary protection by cooperating with the limit piece and the blocking piece to protect the operator. The rotation of the push rod can make the blocking piece move to one side of the limit piece and push the landing door until the blocking piece abuts against the limit piece. When the landing door is opened for the first time, only an observation hole that a human body cannot pass through can be formed. The operator observes whether the car is in place through the observation hole. After confirming that it is safe, the landing door is closed to a certain extent, and the blocking piece will slide down. The landing door is no longer blocked and can be fully opened. The risk of falling caused by unauthorized personnel or authorized personnel opening the landing door privately in an ambiguous state can be prevented. The risk of falling caused by the operator stepping into the wellway due to unclear operation of the car when opening the landing door can be avoided, thereby preventing falling accidents and shearing accidents. cutting accidents; further, the spring-loaded slide has a simple structure, can play a buffering role, has good durability, and can maintain stable operation for a long time; further, through the pulley and the wire rope, when the lever rotates, it can not only trigger the emergency unlocking device, but also make the blocking member slide upward. The simultaneous execution of the two can ensure that the blocking member is located on the side of the limit member when the floor door is pushed open, preventing the floor door from being opened directly to the maximum, and there is no need to set up a driving device to drive the blocking member to slide, and the structure is streamlined; further, the combination of the large pulley and the small pulley can make the movement smoother and more precise, thereby improving work efficiency; further, the sliding direction of the blocking member can be limited by the slide to prevent the blocking member from deviating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model when the middle door is closed;

[0018] Figure 2It is a schematic structural diagram when the blocking member abuts against the limiting member after the landing door is opened;

[0019] Figure 3 It is a schematic structural diagram of the limiting member;

[0020] Figure 4 It is a schematic structural diagram of the sliding member and the blocking member;

[0021] Figure 5 It is a schematic structural diagram of the sliding member and the blocking member from another angle;

[0022] Figure 6 It is a schematic structural diagram of the emergency unlocking device;

[0023] Figure 7 It is a schematic structural diagram of the blocking member from another angle.

[0024] In the figure: 1, lever; 2, pulling device; 3, blocking member; 4, emergency unlocking device; 5, limiting member; 6, landing door; 7, door frame; 8, sliding member; 81, sliding groove; 82, sliding strip; 21, large pulley; 22, small pulley; 23, steel wire rope; 41, fixed hook; 42, movable hook; 43, push rod; 44, hanging door panel; 11, jack; 51, slide rail; 52, spring. Specific embodiments

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Refer to Figures 1 to 7, the present utility model provides a secondary protection mechanism for emergency unlocking of an elevator landing door, which includes a lever 1 provided on the landing door 6, a pulling device 2 connected to the lever 1, a blocking member 3 connected to the other end of the pulling device 2, and an emergency unlocking device 4 provided on the landing door 6 and the door frame 7. The blocking member 3 is slidably provided on the landing door 6. A slider 8 is provided on the side wall of the landing door 6. A chute 81 is provided on the slider 8. A slide bar 82 is slidably provided on the chute 81. The blocking member 3 is connected to the slide bar 82. The slide bar 82 sliding along the chute 81 can drive the blocking member 3 to move. A limiting member 5 is provided on the door frame 7. The limiting member 5 includes a slide rail 51 and a spring 52 provided on the slide rail 51. The blocking member 3 abutting against the limiting member 5 can compress the spring 52. A jack 11 is provided at the other end of the lever. A keyhole is provided on the landing door 6. The jack 11 and the keyhole are connected by a locking member. Inserting a key into the keyhole on the landing door 6 can drive the lever 1 to rotate. The rotation of the lever 1 can drive the pulling device 2 to pull the blocking member 3 to move to one side of the limiting member 5. At the same time, the lever 1 can contact the emergency unlocking device 4 to open the emergency unlocking device 4. Pushing the landing door 6 can make the blocking member 3 abut against the limiting member 5 to prevent the landing door 6 from opening further. The pulling device 2 includes a steel wire rope 23 connecting the lever 1 and the blocking member 3, and also includes a large pulley 21 and a small pulley 22. The steel wire rope 23 passes through the large pulley 21 and the small pulley 22. A hanging door plate 44 is provided at the top of the landing door 6. The emergency unlocking device 4 includes a fixed hook 41 provided on the door frame 7, a movable hook 42 rotatably provided on the hanging door plate 44, and a push rod 43 provided on the movable hook 42. When the lever 1 rotates, it can push the push rod 43 to make the movable hook 42 rotate upward, realizing the separation of the movable hook 42 and the fixed hook 41.

[0027] One end of the above-mentioned blocking member 3 is bent twice to form a door-shaped structure. The length of one end of the blocking member 3 is greater than that of the other end. The above-mentioned blocking member 3 can be of a door shape, an I shape, a U shape or other structures, which are specifically set according to the situation.

[0028] The above-mentioned emergency unlocking device 4 can also adopt other existing unlocking structures, which are specifically set according to the situation.

[0029] The above-mentioned limiting member 5 can also be a structure without elasticity, which can also play a limiting role. A fixed groove can also be installed on the door frame, and the limiting member 5 is installed on the fixed groove, which is specifically set according to the situation.

[0030] The maximum compression amount of the above-mentioned spring 52 is 15 mm, which is specifically set according to the situation.

[0031] The above-mentioned slider 8 and slide bar 82 can also not be provided, which is specifically set according to the situation.

[0032] Only one of the above-mentioned large pulley 21 and small pulley 22 can also be provided, which is specifically set according to the situation.

[0033] The above locking member can be a screw and a nut, which are specifically set according to the situation.

[0034] The working mode of the present utility model is as follows:

[0035] During use, a professional operator inserts a specific key into the keyhole and rotates the key to drive the lever 1 to rotate. The rotation of the lever 1 drives the steel wire rope 23 to pull the blocking member 3, causing the blocking member 3 to slide upward to one side of the limiting member 5. At the same time, the lever 1 can contact the emergency unlocking device 4 to open the emergency unlocking device 4. The operator opens one side of the landing door 6 by hand. When the landing door 6 is opened unilaterally by more than 60 mm, the blocking member 3 contacts the limiting member 5. At this time, continue to push open the landing door 6. When the limiting member 5 reaches the maximum compression amount of 15 mm, the landing door 6 is blocked and cannot be opened further, forming an observation port that a person cannot pass through. The operator observes whether the car is in place through the observation port. After confirming safety, close the landing door 6 in the opposite direction by about 10 mm. The blocking member 3 will slide downward when it is no longer clamped, and the landing door 6 is no longer blocked and can be opened normally, realizing secondary protection and avoiding accidents.

[0036] Although the present utility model is specifically shown and described in combination with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present utility model in terms of form and details without departing from the spirit and scope of the present utility model defined by the appended claims, and all of them are within the protection scope of the present utility model.

Claims

1. A secondary protection mechanism for emergency unlocking of an elevator landing door, characterized in that: It includes a lever arranged on the floor door, a pulling device connected to the lever, a blocking member connected to the other end of the pulling device, and an emergency unlocking device arranged on the floor door and the door frame. The blocking member is slidably arranged on the floor door, and a limiting member is arranged on the door frame. The rotation of the lever can drive the pulling device to pull the blocking member to move to one side of the limiting member. At the same time, the lever can contact the emergency unlocking device to open the emergency unlocking device. Pushing the floor door can make the blocking member abut against the limiting member to prevent the floor door from continuing to open.

2. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 1, characterized in that: The limiting member comprises a slide rail and a spring arranged on the slide rail, and the blocking member abuts against the limiting member to compress the spring.

3. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 2, characterized in that: The maximum compression of the spring is 15 mm.

4. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 1, characterized in that: The other end of the lever is provided with an insertion hole, and the landing door is provided with a key hole. The insertion hole and the key hole are connected through a locking piece, and inserting a key into the key hole on the landing door can drive the lever to rotate.

5. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 1, characterized in that: The pulling device comprises a steel wire rope connected to the shifting rod and the blocking member.

6. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 5, characterized in that: The pulling device also includes a large pulley and a small pulley, and the steel wire rope passes through the large pulley and the small pulley.

7. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 1, characterized in that: A sliding piece is arranged on the side wall of the landing door, a sliding groove is arranged on the sliding piece, a sliding bar is slidably arranged on the sliding groove, the blocking piece is connected to the sliding bar, and the sliding bar can drive the blocking piece to move when sliding along the sliding groove.

8. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 1, characterized in that: A door hanging panel is provided at the top of the floor door. The emergency unlocking device includes a fixed hook arranged on the door frame, a movable hook rotatably arranged on the door hanging panel, and a push rod arranged on the movable hook. When the push rod is rotated, the push rod can be pushed to make the movable hook rotate upward, thereby realizing the separation of the movable hook and the fixed hook.

9. The secondary protection mechanism for emergency unlocking of an elevator landing door according to claim 1, characterized in that: One end of the blocking member is bent twice to form a gate-shaped structure, and the length of one end of the blocking member is greater than the length of the other end.

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