Elevator door knife with improved manual unlocking device

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By designing an elevator door knife with a transmission mechanism, locking mechanism and manual unlocking device in the elevator door knife, the problem of poor safety of the existing elevator door knife manual unlocking device is solved, and high safety manual activation and continuous activation state is achieved in emergency situations.

CN222593165UActive Publication Date: 2025-03-11CIXI JIAYU ELEVATOR PARTS CO LTD

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Patent Information

Application Number: CN202421448270.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-24
Publication Date: 2025-03-11
Estimated Expiration: 2034-06-24

AI Technical Summary

Technical Problem

The existing elevator door knife manual unlocking device has poor safety and is prone to improper pulling, resulting in safety hazards.

Method used

An elevator door knife including a door knife back plate, a transmission mechanism, a locking mechanism and a manual unlocking device are designed. The locking mechanism is unlocked by the combination of the curved rod and the lock hook. The manual unlocking device uses an adjustable adjustment screw and a self-locking adjustment rod to ensure that it can be manually activated and kept the elevator door knife in an active state in an emergency.

Benefits of technology

It improves the manual activation ability of the elevator door knife in emergency situations, and makes the elevator door knife always active by screwing the adjustment screw, which significantly improves safety.

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Figure CN222593165U_ABST

Patent Text Reader

Abstract

The utility model relates to an elevator door knife with an improved manual unlocking device, which comprises a door knife back plate, a left knife arm component and a right knife arm component are arranged on the front side of the door knife back plate, the manual unlocking device is arranged on the side face of the door knife back plate, and the manual unlocking device comprises a support arranged on one side of the door knife back plate. A rotating block is rotatably arranged on the support, a limiting plate used for blocking the connecting plate is arranged on the rotating block, a rotating shaft of the rotating block is connected to the support, an arc-shaped groove is formed in the support around the rotating shaft, a movable rod is arranged on the rotating block, the movable rod penetrates through the arc-shaped groove, and the arc-shaped groove is connected with the rotating shaft of the rotating block. The manual unlocking device has the advantages that the combination of the adjustable adjusting screw and the self-locking adjusting rod is adopted, so that the elevator door knife can be manually started in emergency, and the elevator door knife can be always in an activated state by screwing the adjusting screw, so that the elevator door knife is not prone to falling off, and the service life of the elevator door knife is prolonged. And the safety is high.

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Description

Technical Field

[0001] The utility model relates to an improvement of an elevator door knife device, in particular to an improvement of a manual unlocking device. Background Art

[0002] The elevator door knife transmits the movement of the car door to the landing door by cooperating with the door lock of the landing door, so that the car door and the landing door can be opened or closed synchronously. When the elevator is leveled, the door knife will tighten and clamp the door wheel, so that the hook on the hall door will open, release the door lock, and the door can be opened. During the process of closing the door, if the elevator door machine encounters resistance, such as the force preventing the door from closing is greater than 150N, the door machine will automatically stop closing the door and open the door in the opposite direction, which can prevent the elevator from clamping passengers or objects when closing the door, and play a role in door closing protection. The spring on the door knife can keep the door knife with an appropriate resistance when opening and closing, so that the door can be opened and closed smoothly. During the operation of the elevator, the cooperation of the door knife and the door lock also plays a role in safety protection. If the position of the door lock and the door knife is incorrect, the elevator will stop immediately to prevent the elevator from running when the door is not closed correctly.

[0003] In an emergency, we need to operate the door knife for emergency manual unlocking. For example, our factory has designed a manual unlocking device in an elevator door knife with a car door lock with patent number 2023225427674 to ensure that maintenance personnel can open the elevator door in case of power failure or emergency. However, the wire rope of this wire rope pull lock is easy to be pulled by mistake, and the safety is poor. Utility Model Content

[0004] In order to overcome the disadvantage of poor safety of the existing manual unlocking device for elevator door knife, the utility model provides an elevator door knife with an improved manual unlocking device.

[0005] The technical solution of the utility model to solve its technical problem is: an elevator door knife improved by a manual unlocking device, comprising a door knife back plate, a left knife arm assembly and a right knife arm assembly are arranged on the front of the door knife back plate, a transmission mechanism is arranged on the back of the door knife back plate, the left knife arm assembly and the right knife arm assembly are respectively hinged at two ends of the transmission mechanism, the transmission mechanism is hinged at the center of the door knife back plate, and a locking mechanism is also arranged on the door knife back plate, the locking mechanism comprises a lock plate and a movable plate, the lock plate and the movable plate are connected by a curved rod, a lock hook is arranged at the end of the lock plate, a connecting plate is arranged at the top of the movable plate, the connecting plate is connected with a retractable spring column, and one end of the spring column away from the connecting plate is fixed on the back of the door knife back plate, the door knife back plate is provided with a movable groove at the lower left end corresponding to the movable plate, the lower left end of the movable plate is connected with a pressing wheel, the pressing wheel is arranged through the movable groove, and the left knife arm assembly squeezes the pressing wheel to drive the lock The mechanism is unlocked, and a manual unlocking device is provided on the side of the door knife back plate, and the manual unlocking device includes a bracket arranged on one side of the door knife back plate, the bracket is rotatably provided with a rotating block, the rotating block is provided with a limiting plate for blocking the connecting plate, the rotating shaft of the rotating block is connected to the bracket, the bracket is provided with an arc groove around the rotating shaft, the rotating block is provided with a movable rod, and the movable rod is penetrated in the arc groove, and the manual unlocking device also includes a self-locking adjusting rod, one end of the self-locking adjusting rod is connected to the movable rod, and the other end of the self-locking adjusting rod is connected to the bracket; an adjusting screw is provided on the self-locking adjusting rod, one end of the adjusting screw is penetrated through a through hole on the bracket, and the other end of the adjusting screw is screwed in the first screw hole in the self-locking adjusting rod, so that the adjusting screw can adjust the distance between the screw head and the self-locking adjusting rod; the diameter of the through hole is smaller than the screw head of the adjusting screw.

[0006] Further preferably, an upper connecting head is provided at the upper end of the self-locking adjusting rod, the upper connecting head is connected to the movable rod, a stud is fixedly connected to the lower end of the upper connecting head, and the stud is screwed into the second screw hole on the self-locking adjusting rod.

[0007] In order to accommodate the adjusting screw and the stud, a strip groove is provided on the self-locking adjusting rod, and the adjusting screw and the stud are inserted into the strip groove.

[0008] Further preferably, the strip groove is divided into an upper strip groove for accommodating the stud and a lower strip groove for accommodating the adjusting screw.

[0009] In order to facilitate the installation of the adjusting screw, a transverse plate is provided on the bracket, and the through hole is located on the transverse plate.

[0010] In order to further increase the stability, a spring is sleeved on the adjusting screw, one end of the spring is pressed on the transverse plate and the other end is pressed on the self-locking adjusting rod.

[0011] In order to facilitate the sliding of the adjusting screw, a nylon lubricating sleeve is further provided on the through hole, and the adjusting screw is slidably arranged in the nylon lubricating sleeve.

[0012] For easy selection, the adjusting screw is a cross screw.

[0013] In order to facilitate the adjustment of the screw position, a chamfered surface is provided on the inner side of the screw head of the adjusting screw, and the through hole is pressed on the chamfered surface.

[0014] In order to enable the adjusting screw to be screwed in an emergency, a friction convex strip is arranged on the screw head of the adjusting screw.

[0015] When the utility model is in use, the elevator is in the process of running, the elevator door is in a closed state, at this time, the locking mechanism is in a locked state, and the first lock hook is firmly clamped on the lock block to ensure the safety of passengers; when the elevator runs to the parking floor, the door ball moves between the left arm knife assembly and the right arm knife assembly, and then the door ball pushes the left knife arm assembly to slightly squeeze the pressing wheel to drive the locking mechanism to unlock, drive the curved rod on the back of the doorway back plate to move to the left, and the movable rod rotates clockwise to drive the connecting plate to squeeze the spring column. At the same time, the lock plate rotates counterclockwise to drive the lock hook to tilt up, so that the entire locking mechanism is unlocked, and the elevator car door is allowed to be opened. If the elevator fails, the maintenance personnel can pull down the adjustment screw, thereby driving the limit plate on the rotating block to lift the connecting plate and block it, and the connecting plate drives the entire locking mechanism to lift the lock hook, so that the locking mechanism is urgently unlocked. If the maintenance personnel want the manual unlocking device to be in an activated state, they can screw the adjustment screw so that the adjustment screw drills into the bar groove, and the entire device is straightened and always in a locked state.

[0016] The beneficial effects of the utility model are as follows: 1. The combination of an adjustable adjusting screw and a self-locking adjusting rod is adopted, so that the elevator door knife can be manually activated in an emergency, and the elevator door knife can be always in an activated state by screwing the adjusting screw, which is highly safe. 2. The self-locking adjusting rod is provided with two fine-tuning gears, namely, the stud stroke gear and the adjusting screw stroke gear, which can conveniently adjust the locking stroke and is suitable for a variety of door knife accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the back side of an embodiment.

[0018] Figure 2 It is a front view schematic diagram of an embodiment.

[0019] Figure 3 is a schematic diagram of the manual unlocking device.

[0020] Figure 4 It is a schematic diagram of the manual unlocking device in the other direction. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Combined with Figures 1 to 4 , an elevator door knife with improved manual unlocking device, comprising a door knife back plate 1, a left knife arm assembly 2 and a right knife arm assembly 3 are arranged on the front of the door knife back plate 1, a transmission mechanism 4 is arranged on the back of the door knife back plate 1, the left knife arm assembly 2 and the right knife arm assembly 3 are respectively hinged at both ends of the transmission mechanism 4, the transmission mechanism 4 is hinged at the center of the door knife back plate 1, and a locking mechanism 5 is also arranged on the door knife back plate 1, the locking mechanism 5 comprises a locking plate 6 and a movable plate 7, the locking plate 6 and the movable plate 7 are connected by a curved rod 8, the locking plate 6 is provided with a lock hook 9 at the end, a connecting plate 10 is provided at the top of the movable plate 7, and the connecting plate 10 is connected with a retractable spring column 11, and the end of the spring column 11 away from the connecting plate 10 is fixed to the back of the door knife back plate 1, and the door knife back plate 1 is provided with a movable groove 12 at the lower left end corresponding to the movable plate 7, and the lower left end of the movable plate 7 is connected with a pressing wheel 13, and the pressing wheel 13 is arranged through the movable groove 12, and the left knife arm assembly 2 squeezes the pressing wheel 13 to drive the locking mechanism 5 to unlock, and the side of the door knife back plate 1 is provided with a manual The unlocking device 14 includes a bracket 15 provided on one side of the door blade back plate 1, a rotating block 16 is rotatably provided on the bracket 15, and a limit plate 17 for blocking the connecting plate 10 is provided on the rotating block 16. The rotating shaft of the rotating block 16 is connected to the bracket 15, and an arc groove is provided around the rotating shaft on the bracket 15. A movable rod 18 is provided on the rotating block 16, and the movable rod 18 is inserted in the arc groove. The manual unlocking device 14 also includes a self-locking adjustment Rod 19, one end of the self-locking adjustment rod 19 is connected to the movable rod 18, and the other end of the self-locking adjustment rod 19 is connected to the bracket 15; an adjusting screw 20 is provided on the self-locking adjustment rod 19, one end of the adjusting screw 20 is passed through a through hole 21 on the bracket 15, and the other end of the adjusting screw 20 is screwed into the first screw hole in the self-locking adjustment rod 19, so that the adjusting screw 20 can adjust the distance between the screw head and the self-locking adjustment rod 19; the aperture of the through hole 21 is smaller than the screw head 22 of the adjusting screw 20.

[0023] Further preferably, an upper connector 23 is provided at the upper end of the self-locking adjustment rod 19 , and the upper connector 23 is connected to the movable rod 18 . A stud 24 is fixedly connected to the lower end of the upper connector 23 , and the stud 24 is screwed into a second screw hole on the self-locking adjustment rod 19 .

[0024] In order to accommodate the adjusting screw 20 and the stud 24 , a groove 25 is provided on the self-locking adjusting rod 19 , and the adjusting screw 20 and the stud 24 are inserted into the groove 25 .

[0025] More preferably, the strip groove 25 is divided into an upper strip groove 26 for accommodating the stud 24 and a lower strip groove 27 for accommodating the adjusting screw 20 .

[0026] In order to facilitate the installation of the adjusting screw 20 , a transverse plate 28 is provided on the bracket 15 , and the through hole 21 is located on the transverse plate 28 .

[0027] In order to further increase the stability, a spring 29 is sleeved on the adjusting screw 20 , and one end of the spring 29 presses on the transverse plate 28 and the other end presses on the self-locking adjusting rod 19 .

[0028] In order to facilitate the sliding of the adjusting screw 20 , a nylon lubricating sleeve 30 is further provided on the through hole 21 , and the adjusting screw 20 is slidably disposed in the nylon lubricating sleeve 30 .

[0029] For the convenience of selection, the adjusting screw 20 is a cross screw.

[0030] In order to facilitate the adjustment of the adjusting screw 20 , a chamfered surface 31 is provided on the inner side of the screw head 22 of the adjusting screw 20 , and the through hole 21 is pressed on the chamfered surface 31 .

[0031] In order to allow the adjusting screw 20 to be screwed in an emergency, a friction ridge 32 is provided on the screw head 22 of the adjusting screw 20 .

[0032] When the utility model is in use, the elevator is in the process of operation, the elevator door is in a closed state, at this time, the locking mechanism 5 is in a locked state, and the first lock hook 9 is firmly clamped on the lock block to ensure the safety of passengers; when the elevator runs to the parking floor, the door ball moves between the left arm knife assembly and the right arm knife assembly, and then the door ball pushes the left knife arm assembly 2 to slightly squeeze the pressing wheel 13 to drive the locking mechanism 5 to unlock, drive the curved rod 8 on the back of the doorway back plate to move to the left, and the movable rod 18 rotates clockwise to drive the connecting plate 10 to squeeze the spring column 11, and at the same time, the lock plate 6 rotates counterclockwise to drive the lock hook 9 to tilt up, so that the entire locking mechanism 5 is unlocked, and the elevator car door is allowed to be opened. If the elevator fails, the maintenance personnel can pull down the adjustment screw 20, thereby driving the limit plate on the rotating block 16 to lift the connecting plate 10 and block it, and the connecting plate 10 drives the entire locking mechanism 5 to lift the lock hook 9, so that the locking mechanism 5 is urgently unlocked. If the maintenance personnel want to activate the manual unlocking device 14, they can screw the adjusting screw 20 so that the adjusting screw 20 is drilled into the bar groove 25, and the whole device is straightened and always in the locked state.

[0033] The beneficial effects of the utility model are as follows: 1. The combination of an adjustable adjusting screw and a self-locking adjusting rod is adopted, so that the elevator door knife can be manually activated in an emergency, and the elevator door knife can be always in an activated state by screwing the adjusting screw, which is highly safe. 2. The self-locking adjusting rod is provided with two fine-tuning gears, namely, the stud stroke gear and the adjusting screw stroke gear, which can conveniently adjust the locking stroke and is suitable for a variety of door knife accessories.

Claims

1. An improved elevator door knife for a manual unlocking device, comprising a door knife back plate, a left knife arm assembly and a right knife arm assembly are arranged on the front of the door knife back plate, a transmission mechanism is arranged on the back of the door knife back plate, the left knife arm assembly and the right knife arm assembly are respectively hinged at both ends of the transmission mechanism, the transmission mechanism is hinged at the center of the door knife back plate, and a locking mechanism is also arranged on the door knife back plate, the locking mechanism comprises a lock plate and a movable plate, the lock plate and the movable plate are connected by a curved rod, a lock hook is arranged at the end of the lock plate, a connecting plate is arranged at the top of the movable plate, the connecting plate is connected to a retractable spring column, and the end of the spring column away from the connecting plate is fixed to the back of the door knife back plate, The door knife back plate is provided with a movable groove at the lower left end of the movable plate, the movable plate is connected with a pressure wheel at the lower left end, the pressure wheel passes through the movable groove, the left knife arm assembly squeezes the pressure wheel to drive the locking mechanism to unlock, and a manual unlocking device is provided on the side of the door knife back plate, and the manual unlocking device includes a bracket arranged on one side of the door knife back plate, a rotating block rotatably provided on the bracket, a limiting plate for blocking the connecting plate is provided on the rotating block, the rotating shaft of the rotating block is connected to the bracket, an arc groove is provided on the bracket around the rotating shaft, and a movable rod is provided on the rotating block, and the movable rod is penetrated in the arc groove, characterized in that: The manual unlocking device also includes a self-locking adjusting rod, one end of which is connected to the movable rod, and the other end of which is connected to the bracket; an adjusting screw is provided on the self-locking adjusting rod, one end of which is passed through a through hole on the bracket, and the other end of which is screwed into a first screw hole in the self-locking adjusting rod, so that the adjusting screw can adjust the distance between the screw head and the self-locking adjusting rod; the diameter of the through hole is smaller than the screw head of the adjusting screw.

2. The improved elevator door knife with manual unlocking device according to claim 1 is characterized in that: An upper connector is provided at the upper end of the self-locking adjusting rod, and the upper connector is connected to the movable rod. A stud is fixedly connected to the lower end of the upper connector, and the stud is screwed into the second screw hole on the self-locking adjusting rod.

3. The improved elevator door knife with manual unlocking device according to claim 2 is characterized in that: The self-locking adjusting rod is provided with a strip groove, and the adjusting screw and the stud are inserted into the strip groove.

4. The improved elevator door knife with manual unlocking device according to claim 3 is characterized in that: The strip groove is divided into an upper strip groove for accommodating the stud and a lower strip groove for accommodating the adjusting screw.

5. The improved elevator door knife with manual unlocking device according to claim 1 is characterized in that: A transverse plate is provided on the bracket, and the through hole is located on the transverse plate.

6. The improved elevator door knife with manual unlocking device according to claim 5 is characterized in that: The adjusting screw is also covered with a spring, one end of which is pressed on the horizontal plate and the other end of which is pressed on the self-locking adjusting rod.

7. The improved elevator door knife with manual unlocking device according to claim 6 is characterized in that: A nylon lubricating sleeve is also provided on the through hole, and the adjusting screw is slidably arranged in the nylon lubricating sleeve.

8. The improved elevator door knife with manual unlocking device according to claim 1 is characterized in that: The adjusting screw is a cross screw.

9. The improved elevator door knife with manual unlocking device according to claim 1, characterized in that: The inner side of the screw head of the adjusting screw is provided with a chamfered surface, and the through hole is pressed on the chamfered surface.

10. The improved elevator door knife with manual unlocking device according to claim 1, characterized in that: The screw head of the adjusting screw is provided with a friction convex strip.