Detection device for engagement depth of elevator door lock
By designing an elevator door lock engagement depth detection device, which uses sensors and a processor to calculate the engagement depth, the problems of large measurement errors and low efficiency in existing technologies are solved. This enables efficient and accurate detection of elevator door lock engagement depth, ensuring the safe operation of elevators.
Patent Information
- Application Number
- CN202511887493.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-02-27
AI Technical Summary
Existing methods for detecting the engagement depth of elevator door locks suffer from large measurement errors, require close cooperation between two people, have low inspection efficiency, cannot be measured at the lower end of the elevator, require stopping the elevator from normal operation, and have long inspection times.
Design a device for detecting the engagement depth of an elevator door lock, including a door lock engagement mechanism, a door lock drive mechanism, an arc length calculation unit, and a processor. The device calculates the engagement depth using sensors and sensor combinations, and controls the rotation of the movable lock hook through the processor to achieve dynamic monitoring.
This technology enables direct detection of door lock engagement depth at elevator stops, improving measurement accuracy and efficiency, avoiding observation errors, ensuring elevator safety, and not affecting normal operation.
Smart Images
Figure CN121573541A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of elevator equipment technology, and in particular to a device for detecting the engagement depth of an elevator door lock. Background Technology
[0002] In Clause 5.3.9.1.2 of GB / T7588.1-2020 "Safety Code for Elevator Manufacturing and Installation Part 1: Passenger Elevators and Freight Elevators", the electrical safety device for the locking device of the landing door and car door should only activate when the locking components are engaged for at least 7mm. According to Clause A1.2.7.8(2) of TSG 7001-2023 "Rules for Supervision and Periodic Inspection of Elevators", the car (carrying device) can only start when the locking elements are engaged for at least 7mm. Based on the above requirements, the door lock circuit can only be connected when the engagement length of the locking elements of the elevator landing door lock and car door lock (if any) is at least 7mm.
[0003] Currently, the common inspection method for the above-mentioned items in elevator inspection work is as follows: The elevator is moved to a suitable position for maintenance, the movable latch of the elevator door lock is disengaged, and the measuring personnel place a steel ruler in a suitable position, ensuring the ruler is as close as possible to the limit stop block in the elevator door lock, with the top of the ruler and the highest point of the limit stop block at the same horizontal level, and the ruler as vertical as possible. At this time, the cooperating personnel press the common button and the maintenance up (maintenance down) button, and the measuring personnel slowly lower the movable latch until the elevator car moves (i.e., the electrical contacts just close). The engagement length at which the elevator car just moves is recorded; this engagement length is the minimum engagement length of this door lock. The elevator door lock engagement depth should be the minimum value among multiple door lock measurements.
[0004] The above inspection methods suffer from large measurement errors, require close cooperation between two people, and have low inspection efficiency. Furthermore, the door lock engagement length cannot be measured at the lower elevator terminal, necessitating alternative methods. These methods all require stopping the elevator's normal operation, conducting the inspection from the top of the elevator car, and involve a large number of personnel and lengthy testing time. Therefore, we propose a device for detecting elevator door lock engagement depth. Summary of the Invention
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a device for detecting the engagement depth of an elevator door lock, comprising: A door lock engagement mechanism, comprising a door lock seat, a hook stop disposed on the door lock seat, and a lock arm disposed on one side of the door lock seat, wherein a movable lock hook is rotatably disposed on one side of the lock arm and can engage with the hook stop; A door lock drive mechanism, wherein the door lock drive mechanism is used to drive the movable lock hook to rotate; An arc length calculation unit, comprising a first position sensor disposed at the end of the hook stop, a second position sensor disposed at the end of the movable locking hook, and an angle sensor disposed on the outer wall of the movable locking hook; and, The processor is used to calculate the engagement depth between the movable lock hook and the hook stop, and to drive the door lock drive mechanism. The first position sensor, the second position sensor, and the angle sensor are electrically connected to the processor.
[0006] As a preferred embodiment of the elevator door lock engagement depth detection device of the present invention, wherein: an electrical contact arm is provided on the end face of the door lock seat above the hook stop, and a conductive sheet is provided on the top of the movable lock hook.
[0007] As a preferred embodiment of the elevator door lock engagement depth detection device of the present invention, the door lock drive mechanism includes a rotary motor electrically connected to the processor, the output end of the rotary motor being connected to the input end of a gear reducer, the output end of the gear reducer being connected to one end of a first connecting rod, the other end of the first connecting rod being rotatably connected to one end of a second connecting rod, and the other end of the second connecting rod being rotatably connected to a movable lock hook.
[0008] As a preferred embodiment of the elevator door lock engagement depth detection device of the present invention, wherein: a groove is formed at the end of the hook stop, the first position sensor is embedded in the groove, a groove is formed at the end of the movable lock hook, and the second position sensor is embedded in the groove.
[0009] As a preferred embodiment of the elevator door lock engagement depth detection device of the present invention, it further includes a current transformer, which is disposed in the elevator door lock circuit and connected to the processor.
[0010] As a preferred embodiment of the elevator door lock engagement depth detection device of the present invention, it further includes an alarm unit connected to the processor, the alarm unit including a buzzer and / or a warning light.
[0011] The beneficial effects of this invention are as follows: By using a first position sensor at the end of the hook stop, a second position sensor at the end of the movable lock hook, and an angle sensor on the outer wall of the movable lock hook, the door lock engagement depth can be detected directly at the elevator stop without affecting the normal operation of the elevator. The measurement is performed once the elevator floor door lock is closed, realizing a dynamic monitoring function. When the door lock engagement length is found to be less than 7mm, an early warning is issued in time, improving the safety of the elevator door lock detection process and increasing work efficiency. At the same time, it avoids situations where the elevator stops operating or the measurement accuracy is insufficient due to observation errors in the detection work. Attached Figure Description
[0012] Figure 1A visual diagram of a device for detecting the engagement depth of elevator door locks.
[0013] Figure 2 This is a right-side view of the device for detecting the engagement depth of elevator door locks.
[0014] Figure 3 A left-side view of the device for detecting the engagement depth of elevator door locks.
[0015] Figure 4 This is a flowchart of Example 1.
[0016] Figure 5 This is a flowchart of Example 2. Detailed Implementation
[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Example 1
[0018] Reference Figures 1-4 In the first embodiment of the present invention, an elevator door lock engagement depth detection device is provided. The elevator door lock engagement depth detection device includes a door lock engagement mechanism 100, a door lock drive mechanism 200, an arc length calculation unit 300, and a processor 400. The door lock drive mechanism 200 drives the door lock engagement mechanism 100 to operate, and the cooperation between the arc length calculation unit 300 and the processor 400 can calculate the elevator door lock engagement depth in real time.
[0019] Specifically, the door lock engagement mechanism 100 includes a door lock seat 101, a hook stop 102 disposed on the door lock seat 101, and a lock arm 104 disposed on one side of the door lock seat 101. A movable lock hook 105 that can engage with the hook stop 102 is rotatably disposed on one side of the lock arm 104.
[0020] Currently, elevator landing doors are most vulnerable to being pried open by external forces. If the elevator landing door lock engagement depth is shallow, dangerous situations such as abnormal opening of the landing door lock can easily occur. Therefore, the standard stipulates that at the critical point when the landing door lock electrical safety circuit is closed and the elevator can operate, the engagement depth of the door lock of the elevator landing door or car door must be greater than 7mm, that is, the hook 102 and the movable lock hook 105 must be engaged or hooked firmly for at least 7mm before the elevator car can operate normally.
[0021] Preferably, the door lock drive mechanism 200 is used to drive the movable lock hook 105 to rotate.
[0022] The engagement or disengagement between the hook stop 102 and the movable lock hook 105 requires external power to be applied to the movable lock hook 105, causing the movable lock hook 105 to rotate and disengage from the hook stop 102. Only then can the elevator door lock be opened, and the door lock drive mechanism 200 can be used to drive the movable lock hook 105 to rotate.
[0023] Preferably, the arc length calculation unit 300 includes a first position sensor 301 disposed at the end of the hook 102, a second position sensor 302 disposed at the end of the movable hook 105, and an angle sensor 303 disposed on the outer wall of the movable hook 105.
[0024] When the movable lock hook 105 begins to rotate under the action of the door lock drive mechanism 200, when the end of the movable lock hook 105 rotates to align with the end of the hook stop 102, the second position sensor 302 at the end of the movable lock hook 105 receives a signal from the first position sensor 301 at the end of the hook stop 102. Simultaneously, the second position sensor 302 also sends a signal to the processor 400. At the moment the processor 400 receives the signal, it determines the first angle between the movable lock hook 105 and the horizontal plane based on the angle sensor 303. The processor 400 can then control the angle sensor 303 to rotate the movable lock hook 105 around the first angle, rotating it at an angle set by the operator. The hook 105 reaches a second included angle with the horizontal plane. The angle difference between the second included angle and the first included angle is n degrees. The arm length of the movable locking hook 105 is pre-input into the processor 400. Since the angle change of the movable locking hook 105 during rotation is very small, the difference between the arc length and chord length when the end of the movable locking hook 105 rotates can be ignored. It can be approximately assumed that the arc length is equal to the chord length. The calculated arc length is the engagement depth between the movable locking hook 105 and the hook stop 102. The arc length L when the end of the movable locking hook 105 rotates is L=n*π*r / 180, where L is the arc length, n is the central angle between the first included angle and the second included angle, and r is the arm length of the movable locking hook 105.
[0025] Preferably, the processor 400 is used to calculate the engagement depth between the movable lock hook 105 and the hook stop 102, and to drive the door lock drive mechanism 200 to operate. The first position sensor 301, the second position sensor 302, and the angle sensor 303 are electrically connected to the processor 400 respectively.
[0026] The processor 400 controls the door lock drive mechanism 200 to drive the movable lock hook 105 to rotate. The processor 400 calculates the value of the arc length of the end of the movable lock hook 105 to rotate based on the angle difference n degrees between the second included angle and the first included angle when the movable lock hook 105 rotates, the pre-input arm length r of the movable lock hook 105, and the arc length formula. This value is the engagement depth between the movable lock hook 105 and the hook stop 102.
[0027] In use, the processor 400 controls the door lock drive mechanism 200 to drive the movable lock hook 105 to rotate. When the movable lock hook 105 begins to rotate under the action of the door lock drive mechanism 200, when the end of the movable lock hook 105 rotates to align with the end of the hook stop 102, the second position sensor 302 at the end of the movable lock hook 105 receives the signal generated by the first position sensor 301 at the end of the hook stop 102. At the same time, the second position sensor 302 also sends a signal to the processor 400. At the moment the processor 400 receives the signal, it determines the first angle between the movable lock hook 105 and the horizontal plane based on the angle sensor 303. The processor 400 can then control the angle sensor 303 to rotate the hook 105 starting from the first angle. The line rotates at an angle set by the operator so that the movable hook 105 reaches a second included angle with the horizontal plane. The difference in the central angle between the second included angle and the first included angle is n degrees. The arm length of the movable hook 105 is pre-input into the processor 400. Since the angular change of the movable hook 105 during rotation is very small, the difference between the arc length and chord length when the end of the movable hook 105 rotates can be ignored. It can be approximated that the arc length is equal to the chord length. The calculated arc length is the engagement depth between the movable hook 105 and the hook stop 102. The arc length L when the end of the movable hook 105 rotates is L=n*π*r / 180, where L is the arc length, n is the central angle between the first included angle and the second included angle, and r is the arm length of the movable hook 105. Example 2
[0028] Reference Figure 1 , Figure 2 , Figure 3 ,as well as Figure 5 This is the second embodiment of the present invention, which is based on the previous embodiment.
[0029] Specifically, an electrical contact arm 103 is provided on the end face of the door lock seat 101 above the hook stop 102, and a conductive sheet 106 is provided on the top of the movable lock hook 105.
[0030] When the movable locking hook 105 rotates to the point where the top conductive plate 106 contacts the electrical contact arm 103 above the hook stop 102, the electrical safety circuit is activated. The elevator door lock can be closed through the engagement of the movable locking hook 105 and the hook stop 102, and the process of closing the electrical safety circuit. The present invention can use the contact between the conductive plate 106 and the electrical contact arm 103 as the critical point signal for the closure of the electrical safety circuit.
[0031] Preferably, the door lock drive mechanism 200 includes a rotary motor 201 electrically connected to the processor 400. The output end of the rotary motor 201 is connected to the input end of the gear reducer 202. The output end of the gear reducer 202 is connected to one end of the first link 203. The other end of the first link 203 is rotatably connected to one end of the second link 204. The other end of the second link 204 is rotatably connected to the movable lock hook 105.
[0032] The processor 400 controls the rotation of the rotating motor 201, and the gear reducer 202 can increase the rotation torque. The first connecting rod 203 and the second connecting rod 204 form a crank-connecting rod mechanism, and the movable locking hook 105 is driven to rotate through the second connecting rod 204.
[0033] Preferably, a groove is provided at the end of the hook 102, and the first position sensor 301 is embedded in the groove; a groove is provided at the end of the movable locking hook 105, and the second position sensor 302 is embedded in the groove.
[0034] By embedding the first position sensor 301 and the second position sensor 302 into the grooves opened at the end of the hook 102 and the end of the movable lock hook 105 respectively, the first position sensor 301 or the second position sensor 302 can be prevented from being scratched and damaged.
[0035] Preferably, it also includes a current transformer 500, which is installed in the elevator door lock circuit and connected to the processor 400.
[0036] When the movable locking hook 105 rotates until the top conductive plate 106 contacts the electrical contact arm 103 above the hook stop 102, the electrical safety circuit is connected. At this time, the current transformer 500 detects that the electrical safety circuit is connected and sends a signal to the processor 400, thereby controlling the rotating motor 201 to stop rotating.
[0037] Preferably, it also includes an alarm unit 600, which is connected to the processor 400, and the alarm unit 600 includes a buzzer and / or a warning light.
[0038] When the processor 400 calculates that the engagement depth between the movable locking hook 105 and the hook stop 102 is less than 7mm, the processor 400 controls the activation of the buzzer and / or warning light.
[0039] In use, the processor 400 controls the rotation of the rotating motor 201, and the gear reducer 202 increases the rotational torque. The first connecting rod 203 and the second connecting rod 204 form a crank-connecting rod mechanism. The second connecting rod 204 drives the movable locking hook 105 to rotate. When the end of the movable locking hook 105 rotates to align with the end of the hook stop 102, the second position sensor 302 in the groove at the end of the movable locking hook 105 receives the signal sent by the first position sensor 301 in the groove at the end of the hook stop 102. At the same time, the second position sensor 302 also sends a signal to the processor 400. At the moment the processor 400 receives the signal, it determines the first angle between the movable locking hook 105 and the horizontal plane based on the angle sensor 303. When the movable locking hook 105 rotates until the conductive plate 106 at the top contacts the electrical contact arm 103 above the hook stop 102, the electrical safety circuit is connected. At this time, the current transformer 500 detects the connection of the electrical safety circuit and sends a signal to... The processor 400 then controls the rotating motor 201 to stop rotating. At this time, the processor 400 determines the second included angle between the movable locking hook 105 and the horizontal plane based on the angle sensor 303. The difference in the central angle between the second included angle and the first included angle is n. Since the arm length r of the movable locking hook 105 is input to the processor 400 in advance, the processor 400 can calculate the arc length L when the end of the movable locking hook 105 rotates using the arc length formula: L = n*π*r / 180. Since the angle change of the movable locking hook 105 during rotation is very small, the difference between the arc length and the chord length when the end of the movable locking hook 105 rotates can be ignored. It can be approximated that the arc length is equal to the chord length. The calculated arc length is the engagement depth between the movable locking hook 105 and the hook stop 102. If the calculated arc length L is less than 7mm, the processor 400 controls the activation of the buzzer and / or warning light to trigger an alarm. This invention can realize dynamic monitoring function by measuring once the elevator door lock is closed.
[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A device for detecting the engagement depth of an elevator door lock, characterized in that: include: The door lock engagement mechanism (100) includes a door lock seat (101), a hook stop (102) disposed on the door lock seat (101), and a lock arm (104) disposed on one side of the door lock seat (101). A movable lock hook (105) that can engage with the hook stop (102) is rotatably disposed on one side of the lock arm (104). A door lock drive mechanism (200) is provided for driving the movable lock hook (105) to rotate. An arc length calculation unit (300) includes a first position sensor (301) disposed at the end of the hook stop (102), a second position sensor (302) disposed at the end of the movable locking hook (105), and an angle sensor (303) disposed on the outer wall of the movable locking hook (105); and, The processor (400) is used to calculate the engagement depth between the movable lock hook (105) and the hook stop (102) and to drive the door lock drive mechanism (200) to operate. The first position sensor (301), the second position sensor (302), and the angle sensor (303) are electrically connected to the processor (400).
2. The elevator door lock engagement depth detection device as described in claim 1, characterized in that: An electrical contact arm (103) is provided on the end face of the door lock seat (101) above the hook stop (102), and a conductive sheet (106) is provided on the top of the movable lock hook (105).
3. The elevator door lock engagement depth detection device as described in claim 1, characterized in that: The door lock drive mechanism (200) includes a rotary motor (201) electrically connected to the processor (400). The output end of the rotary motor (201) is connected to the input end of the gear reducer (202). The output end of the gear reducer (202) is connected to one end of the first link (203). The other end of the first link (203) is rotatably connected to one end of the second link (204). The other end of the second link (204) is rotatably connected to the movable lock hook (105).
4. The elevator door lock engagement depth detection device as described in claim 1, characterized in that: The hook (102) has a groove at its end, and the first position sensor (301) is embedded in the groove. The movable lock hook (105) has a groove at its end, and the second position sensor (302) is embedded in the groove.
5. The elevator door lock engagement depth detection device as described in claim 1, characterized in that: It also includes a current transformer (500), which is disposed in the elevator door lock circuit and connected to the processor (400).
6. The elevator door lock engagement depth detection device as described in claim 1, characterized in that: It also includes an alarm unit (600) connected to the processor (400), the alarm unit (600) including a buzzer and / or a warning light.