An elevator hall door lock failure detection device

Abstract

The utility model discloses an elevator hall door lock fault detection device relates to elevator technical field, include: all floor outside call board parallel and with control cabinet connection, all floor hall door lock node series connection and with control cabinet connection, all floor's outside call board fire line end and corresponding floor's hall door lock node connection, each floor outside call board zero line parallel and ground connection, when the hall door lock node of a floor is disconnected, all hall door lock node and outside call board of this floor below lose electricity. The utility model solves the problem of low detection efficiency after elevator hall door failure in high -rise building.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to an elevator hall door lock fault detection device. Background Technology

[0002] With urban buildings becoming increasingly taller, elevators are an indispensable part of high-rise buildings. When elevators malfunction, they impact the building's efficiency. As the elevator component that directly interacts with passengers, landing doors are significantly more prone to malfunctions than other elevator parts. When an elevator landing door malfunctions, the elevator cannot operate, requiring immediate diagnosis and resolution. Currently, elevator landing door locks are all connected in series. Checking each floor individually when a problem occurs in a high-rise building's landing door is extremely inefficient, and adding additional detection devices would increase costs.

[0003] Chinese Patent Publication No. CN119117823A discloses a self-detection alarm device for abnormal elevator landing door lock status, including cables for each floor call subsystem and an electrical connection subsystem. Each floor call subsystem includes an external call panel and a landing door lock corresponding to the lobby. Each external call panel is electrically connected to an auxiliary contact, which is a normally closed switch. Each auxiliary contact corresponding to the external call panel is also installed on the corresponding elevator lobby. Normally closed auxiliary contacts are added to each landing door and connected to the spare input BY of the external call panel. However, this solution requires the installation of auxiliary contacts on each elevator lobby, resulting in high costs. Utility Model Content

[0004] This invention aims to solve the problem that traditional elevator door lock circuits often use a series design, which causes a circuit fault when the door lock switch on a certain floor is disconnected. Maintenance personnel must check the door lock status of all floors one by one, making it impossible to quickly locate the faulty floor using visual signals. This invention aims to improve the repair speed for maintenance personnel. Furthermore, this invention aims to prevent faults caused by signal interference by separating the signal line from the power line.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An elevator hall door lock fault detection device comprises all floor call panels connected in parallel and connected to the control cabinet, all floor hall door lock nodes connected in series and connected to the control cabinet, and the live wire of each floor call panel connected to the corresponding floor's hall door lock node. The neutral wires of each floor call panel are connected in parallel and grounded. When a floor hall door lock node disconnects, all hall door lock nodes and call panels below that floor lose power. When a door lock abnormally disconnects, the elevator call system for the current floor and floors below it will not display any fault information, allowing for easy and clear identification of the floor where the fault occurred.

[0006] Preferably, the hall door lock node includes a travel circuit and a door lock switch, which are connected in parallel to prevent power loss during normal door opening.

[0007] Preferably, when the elevator hall door lock is not malfunctioning, the hall door lock node is connected. When the door is open, the door lock switch is disconnected and de-energized, and the travel circuit is closed and connected. When the door is closed, the door lock switch is closed and connected, and the travel circuit is disconnected and de-energized.

[0008] Preferably, the travel circuit includes a relay controlled by the elevator door's opening and closing status. The relay is connected to a limit switch installed above the elevator car. When the door opens, the relay closes, closing the travel circuit; when the door closes, the relay opens, opening the travel circuit. This improves the response speed and stability of the travel circuit's operation, ensuring immediate feedback of signals when the door status changes.

[0009] Preferably, the travel circuit includes a bypass mechanism and a door ball, with the bypass mechanism connected to the door ball and including an elastic component. The bypass mechanism with the elastic component, in conjunction with the door ball, enables the travel circuit to adaptively operate according to the door's opening and closing state, enhancing the reliability of the travel circuit and eliminating the need for additional power supply compared to a relay.

[0010] Preferably, the hall door lock includes a door knife. When the hall door is in the open state, the door knife presses against the door ball and the bypass mechanism. The elastic component of the bypass mechanism is compressed, the bypass mechanism is activated, and the travel circuit is activated. When the hall door is in the closed state, the door knife releases the door ball and the bypass mechanism. The elastic component of the bypass mechanism resets, the bypass mechanism is disengaged, and the travel circuit is disconnected.

[0011] Preferably, the hall door lock includes a door knife, one side of which is directly connected to the door lock switch. Direct connection between the door knife and the door lock switch simplifies the control chain, reduces losses in intermediate transmission links, and improves the timeliness and reliability of the door lock switch operation.

[0012] Preferably, the external call board uses a four-core cable, including two signal lines and two power lines. The signal lines and power lines of the external call board are designed separately, effectively avoiding signal interference problems.

[0013] Preferably, the control cabinet signal terminal is connected to the external call panels on each floor via the signal line of the four-core cable. Connecting the control cabinet and the external call panels via the dedicated signal line of the four-core cable ensures the stability of control signal transmission and reduces communication failures caused by signal attenuation or interference.

[0014] Through the above-mentioned technology, this utility model improves the fault detection speed when the elevator landing door malfunctions and the elevator cannot run, and solves the problem of low fault detection efficiency when the elevator hall door locks are connected in series. Attached Figure Description

[0015] Figure 1This is the circuit diagram of this utility model.

[0016] Figure 2 This is a schematic diagram of the elevator hall door lock of this utility model.

[0017] In the diagram: 1. Door knife; 2. Bypass mechanism; 3. Door ball; 4. Bypass cable; 5. Door lock switch. Detailed Implementation

[0018] Example 1: This example describes the circuit portion of this utility model. For example... Figure 1 The technical solution for the circuit portion of this utility model revolves around the coordinated circuit design of the external call board and the hall door lock node. All external call boards on all floors are connected in parallel and to the control cabinet, while all hall door lock nodes on all floors are connected in series to the control cabinet. Simultaneously, each floor's external call board forms a circuit connection with the corresponding floor's hall door lock node. The external call boards use four-core cables for circuit connection, including two signal lines and two power lines. The signal terminal of the control cabinet establishes a signal transmission channel with the external call display boards on each floor through the signal lines of the four-core cable. The neutral wires of each floor's external call board are connected in parallel and connected to a grounding loop. As the electrical control hub of the system, the wiring design of the control cabinet directly determines the overall operational efficiency. The control cabinet is equipped with six standardized terminals. Terminal 1 is the positive power output terminal, from which the main power line is led directly to the door lock switch input terminal on the highest floor of the elevator shaft. Terminal 2 is the neutral common terminal, with the neutral main line connected in parallel to the neutral input terminals of the call display panels on each floor, establishing a zero-potential reference for the system. Terminals 3 and 4 are signal transmission interfaces, establishing point-to-point communication with the signal input ports of the call display panels on each floor through independent signal cables, ensuring independent and reliable signal transmission. Terminals 5 and 6 are reserved expansion interfaces, reserving space for future functional upgrades and system expansion, improving the adaptability and service life of the device.

[0019] The hall door lock node consists of a travel circuit and a door lock switch connected in parallel. When the elevator hall door lock is closed and functioning correctly, the door lock switch is closed and conducting, the travel circuit is open and de-energized, and the call circuit is powered by the circuit containing the door lock switch. When the door is open, the door lock switch is open and de-energized, the travel circuit is closed and conducting, and the call circuit is switched to be powered by the bypass cable containing the travel circuit. In the floor call circuit, each call display board is connected via a four-core cable. The live wire is connected to the output terminal of the corresponding floor door lock circuit, the neutral wire is connected to the neutral terminal of the control cabinet, and the signal transmission line is directly connected to the signal terminal of the control cabinet via independent S1 / S2 signal lines. When any floor door lock switch is disconnected, the live wire of that floor and all call display boards below it will immediately lose power, providing a clear indication of fault location. When a hall door lock node on a certain floor is disconnected, all hall door lock nodes and call boards on floors below that floor will lose power due to circuit interruption.

[0020] By linking the external call board with the hall door lock node through circuitry and sharing power lines, rapid fault location can be achieved without the need for additional detection devices. Maintenance personnel only need to observe the external call display status and directly pinpoint the faulty floor by calling the highest power-loss floor, completely solving the problem of low efficiency in traditional floor-by-floor troubleshooting. The four-core cable's signal and power lines are separated, and the neutral wire is grounded in parallel, effectively isolating strong and weak currents, significantly reducing the impact of electromagnetic interference on signal transmission, and ensuring stable circuit signals. The parallel circuit structure of the travel circuit and door lock switch, combined with the bypass cable power supply design in the open state, ensures continuous circuit conduction during normal elevator door opening and closing, stable operation of the external call board, and avoids power interruptions during normal operation. Furthermore, the entire circuit design requires no complex additional components, achieving functional integration based on existing external call cables and door lock nodes, significantly reducing equipment costs and maintenance difficulty. The circuit logic is clear, and the circuit interruption phenomenon during a fault is intuitively identifiable, further improving the convenience of fault handling and the reliability of system operation.

[0021] In Example 2, to ensure the external call board does not lose power when the elevator hall door is open normally, the power supply terminal of the external call board cannot be connected to the control cabinet solely through the door lock switch. The external call board also requires a circuit to supply power to the external call board when the hall door is open normally. This example uses the car position determination as the core trigger condition, and achieves precise short-circuiting of the door lock switch through the coordinated action of the limit switch and the relay. During elevator operation, the control cabinet continuously monitors the car position in real time through the floor positioning system. When the car moves towards the target floor and enters the stopping area, the position detection signal is synchronously transmitted to the preset limit switch control module above the car. When the car accurately stops at the floor, and before the door operator system starts the door opening procedure, the floor positioning signal triggers the limit switch to act, and the limit switch changes from the open state to the closed state, connecting the power supply circuit of the newly added relay coil. After the relay coil is energized, it generates electromagnetic force, driving its normally open contact to close rapidly. The normally open contact of this relay has been pre-connected in parallel across the door lock switch of the corresponding floor. The closing of the contact completes the short-circuiting operation of the door lock switch of that floor. During the opening of the hall door, the door operator mechanism disconnects the door lock switch, interrupting the original power supply path. However, the external call board can immediately obtain power through the circuit formed by the relay short-circuit. The power supply current is output from the control cabinet, bypasses the disconnected door lock switch through the closed contacts of the relay, and is directly supplied to the power supply terminal of the external call board on that floor. After the hall door completes the closing action, the door operator system sends a closing signal, and the floor positioning system simultaneously confirms that the car is about to leave or has reached a stationary closing state. The limit switch then resets and opens, the relay coil is de-energized, its normally open contact springs back and opens, the short-circuit circuit terminates its operation, the door lock switch closes again, and the external call board resumes to be powered by the original door lock switch circuit. The backup power supply circuit is only activated when the car stops and the door opens, avoiding circuit redundancy in unnecessary states. At the same time, this circuit works independently with the power line in the four-core cable of the external call board, without interacting with the signal line. It not only achieves functional upgrades based on the existing circuit framework, but also prevents the external call board from losing power when the hall door is normally opening through intelligent switching of dual power supply paths.

[0022] Example 3: To address the issues of easy failure and malfunction in the presence of interference when using electrical methods in Example 2, this invention designs a circuit switching structure based on the mechanical structure of the door lock. In this example, automatic circuit switching is achieved through the mechanical linkage of the door knife mechanism, bypass mechanism, door ball, and door lock switch. When the door is closed, the door knife mechanism remains open. When the elevator passes through the doors on each floor, the door knife mechanism and bypass mechanism are never in contact. At this time, the door lock switch is in the closed state. The conduction of the hall door lock node is achieved entirely through the circuit where the door lock switch is located. The current is output from the control cabinet and stably delivered to the external call board through the closed door lock switch, ensuring the normal operation of the external call function.

[0023] When the elevator enters the open position, the door knife mechanism activates and gradually clamps the door ball. During clamping, the door knife mechanism comes into contact with the bypass mechanism. Because the spring in the bypass mechanism constantly pushes the metal connecting device to the extended position, the contact pressure of the door knife mechanism causes the metal connecting device to connect tightly with the left metal plate. This mechanical contact directly conducts the bypass circuit. At this time, the conduction of the hall door lock node relies on the dual path of power supply from both the door lock switch circuit and the bypass circuit. The door knife mechanism continues to operate, moving to the left after clamping the door ball. This mechanical displacement causes the door lock device to lift synchronously, thereby disengaging the door lock switch. The original power supply path of the door lock switch is thus interrupted, while the previously conducted bypass cable seamlessly takes over the power supply task. Current is continuously delivered to the external call board through the bypass cable, ensuring that the external call board does not lose power due to the door lock switch being disconnected during the door opening process.

[0024] The entire circuit switching process is driven by the orderly movements of the mechanical structure. The posture changes of the door knife mechanism, the force movement of the door ball, the spring reset of the bypass mechanism, and the opening and closing state of the door lock switch form a precise linkage. The mechanical movements and circuit state switching are synchronized in real time. Automatic circuit switching can be completed without additional electrical control components. This ensures the continuous power supply to the external call board when the elevator is opening and closing normally, and improves the stability and accuracy of circuit switching by relying on the inherent reliability of the mechanical structure.

[0025] Example 4 describes the situation when the elevator hall door malfunctions.

[0026] When the elevator hall door experiences a door lock switch jamming failure, the door knife mechanism remains open in the closed state, not contacting the bypass mechanism. The door ball naturally resets, and the bypass mechanism's spring pushes the metal connecting device out. However, the door lock switch, which should be closed, remains open due to the jamming. At this point, the door lock node of that floor fails due to the disconnection of the core path, and the series door lock circuit is interrupted at this point. At the circuit level, current cannot be transmitted downwards through the faulty node, and all hall door lock nodes at and below the faulty floor lose power. The corresponding external call panels are all extinguished due to the power supply circuit interruption; only the external calls above the faulty floor display normally. When the car stops at the faulty floor and starts opening the door, the door knife mechanism clamps the door ball and presses the bypass mechanism to open the bypass circuit. The external call panel of the faulty floor temporarily receives power through the bypass and resumes display, but the series circuit is still blocked by the jammed door lock switch, and the external calls to the lower floors remain de-energized. After the car leaves and the door closes, the bypass disconnects, and the external calls to the faulty floor are extinguished along with the power supply interruption, while the external calls to the lower floors remain de-energized.

[0027] When the bypass mechanism spring of the hall door is damaged and fails, the door knife mechanism opens without contacting the bypass mechanism when the door is closed, the door lock switch closes normally, and the external calls are powered normally. However, when the car stops and the door opens, after the door knife mechanism clamps the door ball, the damaged spring cannot push the metal connecting device, and the metal connecting device cannot connect with the metal plate on the left side, so the bypass circuit is always disconnected. The door knife continues to move to the left, causing the door lock switch to lift and disconnect. At this time, the door lock node of the hall door on that floor is completely disconnected because the door lock switch is disconnected and the bypass is not connected, and the series circuit is interrupted. At the circuit level, the external call boards on the faulty floor and below are all de-energized and turned off due to power outage, and only the external call on the upper floor is normal. When the door is closed, the door knife opens, the door lock switch closes, the series circuit is restored, and the external calls on the faulty floor and below are powered on again. However, before the spring is repaired, the cycle of "door lock disconnected, bypass not connected, node failure, lower floor external call power failure" will repeat every time the door is opened.

[0028] When the door knife mechanism fails to properly clamp the door ball due to wear or jamming, the fault manifests in two core states: First, the door knife cannot contact the door ball at all. When the door is opened, it neither triggers the bypass mechanism nor drives the door lock switch to open. However, because the door knife is not activated, the hall door remains in a slightly ajar state, and the door lock switch cannot close properly. This causes the door lock node of the hall door on that floor to disconnect, interrupting the series circuit, and causing all external call panels on the faulty floor and below to lose power and go out. Second, the door knife makes slight contact with the door ball but does not press it firmly. It neither activates the bypass nor drives the door lock switch to open. However, due to insufficient force from the door knife, the hall door cannot be fully closed. The door lock switch remains open due to the door's condition, similarly causing the door lock node on that floor to fail, interrupting the series circuit, and causing the external call panels on the faulty floor and below to lose power. If the door knife becomes jammed and stagnant after contacting the door ball, neither triggering the bypass nor driving the door lock switch, the hall door remains in a half-open state, the door lock switch cannot close, the door lock node on that floor remains open, and the external call panels on the faulty floor and below continue to lose power, with only the external call panels on the upper floors functioning normally. After the door knife malfunction is repaired, the door knife clamps the door ball normally when the door is opened, the bypass is open, the door lock is disconnected, the node maintains the circuit through the bypass, the series circuit is normal, and all external calls are restored to power.

[0029] When the door lock on a certain floor is disconnected, the external call display for that floor and below will simultaneously lose power. Maintenance personnel can quickly pinpoint the fault location by observing the highest floor that is not displayed. This is followed by a systematic troubleshooting phase, employing parallel inspection methods to simultaneously test critical components such as door lock contacts, springs, and connecting wires, improving troubleshooting efficiency. Based on the inspection results, the process will sequentially delve into the inspection of the car-side mechanisms and control cabinet circuits, with each judgment node having a clear repair path. After repair, the system will perform a verification test to ensure the fault is truly resolved. If verification fails, it will automatically return to the initial observation steps for re-inspection, forming a complete closed-loop process. The maintenance process is as follows.

[0030] Observe the status of the call displays. Maintenance personnel should observe the status of the call displays on each floor to determine which floors' call displays are not lit. Because this invention connects the hall door lock and the call cable power supply in series, while the neutral wire is directly connected in parallel to the call boards on each floor, when a door lock on a certain floor is disconnected, the call displays on that floor and all floors below it will lose power. Therefore, the highest floor that cannot display is the faulty floor. This step can quickly pinpoint the fault to a specific floor without needing to check each floor individually.

[0031] Inspect the door lock mechanism on the faulty floor. Maintenance personnel will proceed to the identified faulty floor and inspect the door lock mechanism. During the inspection, attention should be paid to the physical status of the door lock switch and the connection of the bypass mechanism. As shown in the structural diagram, the door lock switch and bypass switch are installed side-by-side. When the door lock is functioning normally, the switch is in the closed state. When the car stops, the door knife mechanism will contact the bypass mechanism and activate the bypass circuit, simultaneously lifting the door lock device to disconnect the door lock switch.

[0032] Inspect the car-side mechanisms. Maintenance personnel should check the limit switches and door knife mechanism on the car side. When the car stops at the faulty floor, observe whether the door knife mechanism can properly clamp the door ball, whether the bypass mechanism can be properly pressed and conduct the left-side metal plate, and whether the door lock device can be properly lifted. This step can determine whether the fault occurs on the landing door side or the car side, further narrowing down the possible causes.

[0033] Inspect the control cabinet circuit connections. Maintenance personnel should check the circuit connections at the control cabinet end. Confirm that the power cable to terminal 1, and the signal cables to terminals 3 and 4 of the control cabinet are connected correctly, and check for loose or damaged four-core cables (S1 / S2 signal and power cables) on the external call panels of each floor. Since this invention uses a separate design for signal and power cables, maintenance personnel should also confirm that signal transmission is normal to eliminate faults caused by signal interference.

Claims

1. A device for detecting elevator hall door lock malfunctions, characterized in that, All floor call panels are connected in parallel and connected to the control cabinet. All floor hall door lock nodes are connected in series and connected to the control cabinet. The live wire of all floor call panels is connected to the corresponding floor hall door lock node. The neutral wire of all floor call panels is connected in parallel and grounded. When a floor hall door lock node is disconnected, all hall door lock nodes and call panels below that floor lose power.

2. The elevator hall door lock fault detection device according to claim 1, characterized in that, The hall door lock node includes a travel circuit and a door lock switch (5), and the travel circuit and the door lock switch (5) are connected in parallel.

3. A fault detection device for elevator hall door locks according to claim 1 or 2, characterized in that, When the elevator hall door lock is not faulty, the hall door lock node is connected. When the door is open, the door lock switch (5) is disconnected and de-energized, and the travel circuit is closed and connected. When the door is closed, the door lock switch (5) is closed and connected, and the travel circuit is disconnected and de-energized.

4. The elevator hall door lock fault detection device according to claim 3, characterized in that, The travel circuit includes a relay controlled by the elevator door opening and closing status. The relay is connected to a limit switch installed above the elevator car. When the door opens, the relay closes, and the travel circuit closes. When the door closes, the relay opens, and the travel circuit closes.

5. The elevator hall door lock fault detection device according to claim 3, characterized in that, The travel circuit includes a bypass mechanism (2) and a ball ball (3). The bypass mechanism (2) is connected to the ball ball (3). The bypass mechanism (2) includes an elastic component.

6. The elevator hall door lock fault detection device according to claim 5, characterized in that, The hall door lock includes a door knife (1). When the hall door is in the open state, the door knife (1) presses against the door ball (3) and the bypass mechanism (2). The elastic component of the bypass mechanism (2) is squeezed, the bypass mechanism (2) is turned on, and the travel circuit is turned on. When the hall door is in the closed state, the door knife (1) releases the door ball (3) and the bypass mechanism (2). The elastic component of the bypass mechanism (2) is reset, the bypass mechanism is turned off, and the travel circuit is turned off.

7. The elevator hall door lock fault detection device according to claim 2, characterized in that, The hall door lock includes a door knife (1), one side of which is directly connected to the door lock switch (5).

8. The elevator hall door lock fault detection device according to claim 1, characterized in that, The external call board uses a four-core cable, including two signal lines and two power lines.

9. The elevator hall door lock fault detection device according to claim 8, characterized in that, The control cabinet signal terminal is connected to the external call panels on each floor via the signal line in the four-core cable.

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