A car elevator control method and device

Abstract

The present invention provides a car elevator control method and device, the method comprising: detecting whether the elevator door is closed before the car is lifted; and controlling the elevator door to reopen when the elevator door is not closed. The beneficial effect of the present invention is: by detecting whether the elevator door is not closed before the car is lifted, controlling the elevator door to reopen, preventing the elevator door from being lifted before the elevator door is closed, preventing the occurrence of elevator injuries, and improving the safety of the car elevator.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a car elevator control method and device. Background Art

[0002] Elevators bring convenience to users, but the casualties caused by elevators terrify users. In accidents, it is an indisputable fact that there are more car elevator accidents than escalator elevators, and about 80% of car elevator accidents are caused by elevator doors. The accident process is that the elevator door clamps the elevator car and the elevator car accidentally rises and falls, causing the elevator passengers to be squeezed and torn by the door frames of the elevator door and the hall door. The injury process is more tragic than the ancient Chinese waist beheading and the foreign guillotine. Users have always attributed the cause of the accident to the improper elevator riding action of the elevator passengers. The root cause of the accident is the safety defect in the control logic of the elevator door control system of the elevator car. The defect is that the elevator car should not rise or fall if the elevator door is not closed. More precisely, if the elevator door is completely closed and the elevator car rises or falls, no matter what improper elevator action the elevator passengers make, it will not cause casualties to the elevator passengers.

[0003] The existing elevator control system uses an open-loop control mode based on timing program control for door opening and closing and elevator car lifting. Although an infrared detector is used to detect whether there is an obstacle in the door frame during the closing process of the elevator door, there are two major defects in infrared detection: one is the existence of a detection blind spot, and the other is that even if the object to be detected is in the infrared detection area, the object to be detected must completely block the infrared rays entering the infrared receiver before the infrared receiver can output a detection signal. In other words, the elevator passengers cannot appear in the detection blind spot and completely block the infrared rays entering the infrared receiver. Only then can the detector reliably output a detection signal to control the elevator door to open or output an alarm sound. Otherwise, the elevator car will rise and fall after the door closing delay ends. About 80% of elevator accidents are caused by this, so it is wrong and unfair to blame the cause of the accident on the elevator passengers' improper elevator riding actions.

[0004] Below we outline the working principle of the elevator door control system and use it to prove the safety hazards of the control system. It is mainly composed of a timer and an infrared detector. The timer is used to control the opening and closing of the elevator door and the lifting of the elevator car. The infrared detector is used to detect obstacles during the closing process of the elevator door. If an obstacle is detected, the door will stop closing and reopen to allow passengers to escape. The infrared detector consists of an infrared light-emitting tube and an infrared photosensitive tube installed on both sides of the elevator door frame. If the infrared rays are blocked by the elevator passengers during the closing process of the elevator door, the infrared detector will output an emergency door opening signal to control the elevator from closing the door to opening the door to prevent the elevator door from pinching people. If the elevator passengers do not completely block the infrared rays when entering and exiting the elevator car, the infrared detector will not be able to output an emergency door opening signal, and the elevator passengers will easily be pinched by the elevator door and injured or killed during the lifting of the elevator car. The accident was obviously caused by the elevator passengers not completely blocking the infrared rays, resulting in the detector not outputting detection signals. Most of the victims in the accident were elderly people and children. It should be noted that all the victims were not pinched to death by the elevator door, but were pinched by the elevator door and could not escape, and were squeezed to death during the subsequent lifting of the elevator car. The accident proved that the elevator control system has the following defects: before the elevator car is lifted, it only uses infrared detectors to detect whether there are obstacles blocking the elevator door from closing, but does not detect whether the elevator door is closed. If the infrared detection fails or the obstacle is located in the infrared detection blind spot, it is easy to cause passengers to be trapped and injured or killed during the elevator car lifting. The defects of the existing elevator door control technology are: the elevator car lifting is an open-loop control with time control. Before lifting, it only detects whether there are obstacles between the elevator doors during the closing process, but does not detect whether the elevator doors are reliably closed. If the detection fails, the elevator car will still lift on time, resulting in casualties. This is the fundamental factor leading to the elevator door accident. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a car elevator control method and device in view of the deficiencies in the prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a car elevator control method, comprising:

[0007] Before the car is raised or lowered, check whether the elevator door is closed;

[0008] When the elevator door is not closed, control the elevator door to reopen.

[0009] The beneficial effects of the present invention are: by detecting that the elevator door is not closed before the car is lifted, the elevator door is controlled to reopen, thereby preventing the elevator from lifting or lowering without the elevator door being closed, preventing the occurrence of elevator injuries, and improving the safety of the car elevator.

[0010] Furthermore, when the elevator door is not closed, the step of controlling the elevator door to reopen comprises:

[0011] When the elevator door is not closed, the car lifting command is converted into an emergency door opening command;

[0012] According to the emergency door opening command, the elevator door is controlled to reopen.

[0013] The beneficial effect of adopting the above further solution is that if the elevator door is not closed, the control system outputs the car lifting command, which is automatically converted by the device into an output emergency door opening signal to control the elevator door to reopen so that the passengers can escape from danger. This prevents the elevator from starting to lift before the door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0014] Furthermore, after the step of controlling the elevator door to reopen when the elevator door is not closed, the following steps are performed:

[0015] Determine whether the user inputs an emergency key command;

[0016] When the user inputs the emergency button command, the elevator door is controlled to close.

[0017] The beneficial effect of adopting the above further solution is that after the user escapes from danger, the emergency button can be pressed to control the elevator door to close again, which is convenient for the user to escape from danger, prevents the elevator from causing harm to the user, prevents the elevator from starting to lift before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0018] Furthermore, when the user inputs an emergency button command, after the step of controlling the elevator door to close, the step further includes: controlling the elevator car to rise and fall.

[0019] The beneficial effect of adopting the above further solution is that after the user inputs the emergency button command and the elevator door is closed, the lifting permission command is output, and the elevator car starts to lift safely when the lifting signal is output. This prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the elevator car.

[0020] Furthermore, the step of detecting whether the elevator door is closed before the elevator car is raised or lowered comprises:

[0021] When the elevator door is closed, the elevator car is controlled to rise and fall.

[0022] The beneficial effect of adopting the above further solution is that only when the elevator door is completely closed, the car lifting instruction is output to control the car lifting, which prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0023] In addition, the present invention also provides a car elevator control device, which includes: a door travel detection mechanism for detecting whether the door is fully closed and an emergency control mechanism for controlling emergency opening and closing of the door and lifting of the car, wherein the door travel detection mechanism is connected to the emergency control mechanism;

[0024] The elevator door travel detection mechanism is used to detect whether the elevator door is closed before the elevator car is raised or lowered;

[0025] The emergency control mechanism is used to control the elevator door to reopen when the elevator door is not closed.

[0026] The beneficial effects of the present invention are: by detecting that the elevator door is not closed before the car is lifted, the elevator door is controlled to reopen, thereby preventing the elevator from lifting or lowering without the elevator door being closed, preventing the occurrence of elevator injuries, and improving the safety of the car elevator.

[0027] Furthermore, the emergency control mechanism includes: a first double AND gate circuit, a second double AND gate circuit, an inverter, and a normally open / normally closed composite emergency key, the elevator door travel detection mechanism is connected to the first double AND gate circuit and the inverter, and the second double AND gate circuit is connected to the first double AND gate circuit, the inverter, and the normally open / normally closed composite emergency key;

[0028] The emergency control mechanism is also used to convert the car lifting command into an emergency door opening command when the elevator door is not closed;

[0029] The emergency control mechanism is also used to control the elevator door to reopen according to the emergency door opening instruction.

[0030] The beneficial effect of adopting the above further solution is that if the elevator door is not closed, the control system outputs the car lifting command, which is automatically converted by the device into an output emergency door opening signal to control the elevator door to reopen so that the passengers can escape from danger. This prevents the elevator from starting to lift before the door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0031] Further, the elevator door travel detection mechanism includes: a first detection component for detecting the elevator door travel and a second detection component for detecting the elevator door travel, the first detection component is arranged on the elevator door, the second detection component is arranged on the car door frame, the first detection component and the second detection component are arranged correspondingly, and the second detection component is arranged adjacent to the car control panel;

[0032] The emergency control mechanism is also used to determine whether the user inputs an emergency key command;

[0033] The emergency control mechanism is also used to control the elevator door to close when the user inputs an emergency key command.

[0034] The beneficial effect of adopting the above further solution is that after the user escapes from danger, the emergency button can be pressed to control the elevator door to close again, which is convenient for the user to escape from danger, prevents the elevator from causing harm to the user, prevents the elevator from starting to lift before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0035] Furthermore, the elevator door travel detection mechanism is a micro switch, a mercury switch, an infrared electronic switch or a Hall electronic switch;

[0036] The emergency control mechanism is also used to control the lifting of the car.

[0037] The beneficial effect of adopting the above further solution is that after the user inputs the emergency button command and the elevator door is closed, the lifting permission command is output, and the elevator car starts to lift safely when the lifting signal is output. This prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the elevator car.

[0038] Furthermore, the emergency control mechanism is also used to control the lifting of the car when the elevator door is closed.

[0039] The beneficial effect of adopting the above further solution is that only when the elevator door is completely closed, the car lifting instruction is output to control the car lifting, which prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0040] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic flow chart of a car elevator control method provided in an embodiment of the present invention.

[0042] Figure 2 A schematic diagram of the installation structure of a car elevator control device provided in an embodiment of the present invention.

[0043] Figure 3 A schematic diagram of the control principle of a car elevator control device provided in an embodiment of the present invention.

[0044] Explanation of the accompanying drawings: 1-elevator door travel detection mechanism; 2-emergency control mechanism; 3-first double AND gate circuit; 4-second double AND gate circuit; 5-inverter; 6-normally open / normally closed composite emergency button; 7-first detection component; 8-second detection component; 9-car door frame; 10-car control panel; 11-car; 12-left elevator door; 14-right elevator door; 15-connecting cable. DETAILED DESCRIPTION

[0045] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0046] like Figure 1 As shown, an embodiment of the present invention provides a car elevator control method, which includes:

[0047] S1. Before the car is raised or lowered, check whether the elevator door is closed;

[0048] S2: When the elevator door is not closed, control the elevator door to reopen.

[0049] The beneficial effects of the present invention are: by detecting that the elevator door is not closed before the car is lifted, the elevator door is controlled to reopen, thereby preventing the elevator from lifting or lowering without the elevator door being closed, preventing the occurrence of elevator injuries, and improving the safety of the car elevator.

[0050] Furthermore, when the elevator door is not closed, the step of controlling the elevator door to reopen comprises:

[0051] When the elevator door is not closed, the car lifting command is converted into an emergency door opening command;

[0052] According to the emergency door opening command, the elevator door is controlled to reopen.

[0053] The beneficial effect of adopting the above further solution is that if the elevator door is not closed, the control system outputs the car lifting command, which is automatically converted by the device into an output emergency door opening signal to control the elevator door to reopen so that the passengers can escape from danger. This prevents the elevator from starting to lift before the door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0054] The present invention is a safety control device specifically designed to eliminate the above-mentioned defects of the elevator control system. The device detects whether the elevator door is closed before the elevator car is lifted. Only when the elevator door is completely closed, the device outputs a command to allow the elevator car to be lifted and lowered to control the elevator car. If the elevator door is not closed, the control system outputs a car lifting command, which is automatically converted by the device into an emergency door opening signal to control the elevator door to reopen so that the passengers can escape danger. After the passengers escape danger, the emergency button of the device can be pressed to control the elevator door to close again. After the elevator door is closed, the device outputs a command to allow lifting, and the elevator car begins to lift safely when the control system outputs a lifting signal. This device adds the above-mentioned automatic control device to the existing elevator control system to eliminate the accidents of casualties caused by the elevator door clamping people during lifting.

[0055] Furthermore, after the step of controlling the elevator door to reopen when the elevator door is not closed, the following steps are performed:

[0056] Determine whether the user inputs an emergency key command;

[0057] When the user inputs the emergency button command, the elevator door is controlled to close.

[0058] The beneficial effect of adopting the above further solution is that after the user escapes from danger, the emergency button can be pressed to control the elevator door to close again, which is convenient for the user to escape from danger, prevents the elevator from causing harm to the user, prevents the elevator from starting to lift before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0059] Furthermore, when the user inputs an emergency button command, after the step of controlling the elevator door to close, the step further includes: controlling the elevator car to rise and fall.

[0060] The beneficial effect of adopting the above further solution is that after the user inputs the emergency button command and the elevator door is closed, the lifting permission command is output, and the elevator car starts to lift safely when the lifting signal is output. This prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the elevator car.

[0061] Furthermore, the step of detecting whether the elevator door is closed before the elevator car is raised or lowered comprises:

[0062] When the elevator door is closed, the elevator car is controlled to rise and fall.

[0063] The beneficial effect of adopting the above further solution is that only when the elevator door is completely closed, the car lifting instruction is output to control the car lifting, which prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0064] like Figure 2 As shown, in addition, the present invention also provides a car elevator control device, which includes: a door travel detection mechanism 1 for detecting whether the elevator door is fully closed and an emergency control mechanism 2 for controlling emergency opening and closing of the elevator door and lifting and lowering of the car 11, the door travel detection mechanism 1 is connected to the emergency control mechanism 2;

[0065] The elevator door travel detection mechanism 1 is used to detect whether the elevator door is closed before the elevator car 11 is raised or lowered;

[0066] The emergency control mechanism 2 is used to control the elevator door to reopen when the elevator door is not closed.

[0067] The beneficial effects of the present invention are: by detecting that the elevator door is not closed before the car is lifted, the elevator door is controlled to reopen, thereby preventing the elevator from lifting or lowering without the elevator door being closed, preventing the occurrence of elevator injuries, and improving the safety of the car elevator.

[0068] If the car door is not closed before driving, the driver should be held responsible for the accident. If the elevator door is not closed before ascending or descending, the accident indicates that there is something wrong with the elevator door control system. The invention has the following features: it can be installed on various existing elevator control systems and can be integrated into the control system as a control component during the manufacturing process of the elevator.

[0069] On the basis of the existing elevator control system, an automatic door closing detection device is added. If the door is detected to be closed, the car is allowed to rise and fall. If the door is detected to be not closed, the car is prohibited from rising and falling, thereby completely avoiding the occurrence of casualties caused by the door clamping the person during lifting and falling! The present invention improves the existing car control system from a control mode of timing open-loop control as the main and detection as the auxiliary to a control mode of detecting the door closing signal as the main and timing signal as the auxiliary, that is, a composite control mode of closed-loop control as the main and timing control, i.e., open-loop control as the auxiliary. The key condition for the car to rise and fall is to detect whether the door is closed, and the existing car control system does not have this key condition, so it is easy to cause casualties.

[0070] The present invention is a safety device for eliminating the accident of casualties caused by elevator door in a car. The device first detects the state of the door before each lift of the car. If the door is closed, the lift is controlled. If the door is not closed, the door is controlled to reopen so that passengers trapped in the elevator can escape. The device ensures that the car will not be lifted or lowered until the door is fully closed, and automatically opens the door to allow passengers to escape safely, thereby eliminating the defect of the existing elevator door in the car that easily causes casualties. About 3 billion people enter and exit elevators every day in the world. If the control system of the existing elevator is equipped with the device, casualties caused by passengers being trapped in the elevator door during lifting and lowering can be eliminated.

[0071] Description of the device of the present invention: The present invention is a safety control device added to the existing car elevator control system. The device can be installed on the existing car elevator or integrated into the car control system when manufacturing the car elevator. The device consists of two parts: a door travel detection system (i.e., a door travel detection mechanism) and an emergency control system (i.e., an emergency control mechanism). The door travel detection system is used to detect whether the door is closed before the car is raised or lowered. The emergency control system automatically controls the emergency opening and closing of the door and the lifting of the car in real time according to the detection signal output by the door travel detection system. The structure and function of each system are as follows.

[0072] Elevator door travel detection system: The system can use a travel switch composed of a mechanical switch such as a micro switch or a mercury switch, or a contactless electronic switch such as an infrared electronic switch or a Hall electronic switch to realize the elevator door travel detection function, but no matter which switch is used, it belongs to the technical features and claims of the present invention.

[0073] The following uses the Hall travel switch as an example to explain the structure and working principle of the elevator door travel detection system.

[0074] like Figure 2As shown in the figure, the structure, installation method and working principle of the Hall travel switch are as follows: the Hall travel switch consists of a permanent magnet fixed on the elevator door and a Hall switch fixed on the car door frame. The permanent magnet and the Hall switch are installed at the same height, and the permanent magnet faces the Hall switch when the elevator door is closed. In order to shorten the connection between the device and the existing control system of the car elevator, the Hall travel switch is installed on the door frame on the side close to the car button control panel, and the installation height is the same as the plug socket height behind the control panel. The Hall switch generates a switch signal based on the Hall effect, that is, electromagnetic induction. After the Hall switch is powered on, the permanent magnet on the elevator door leaves the Hall switch when the elevator door is opened, so the Hall switch outputs a zero level when the elevator door is opened. When the elevator door is closed, the permanent magnet on the elevator door faces the magnetic sensitive area of ​​the Hall switch, the Hall switch is turned on, and outputs a high level.

[0075] like Figure 3 As shown in the figure, the structure of the emergency control system: The emergency control system consists of a double AND gate circuit, an inverting circuit (i.e., an inverter), and a normally open / normally closed composite emergency button. The system inputs the elevator door detection signal K1 output by the Hall travel switch and the lifting control signal K2 output by the elevator control system, and automatically generates the elevator door emergency opening signal K3, the elevator lifting control signal K4, and the manual door closing control signal K5. The structure of the elevator control system is shown in the figure. Figure 3 As shown: the Hall switch output signal K1 and the car lifting signal output by the car control system are input into the double AND gate circuit 1 (i.e., the first double AND gate circuit). The output signal of the double AND gate circuit 1 is input into the car lifting control system as the car lifting signal to control the car lifting. The Hall switch output signal is inverted by the inverter circuit and input into the double AND gate circuit 2 (i.e., the second double AND gate circuit) together with the car lifting signal. The output signal of the double AND gate circuit 2 is connected to the normally open / normally closed composite key.

[0076] Figure 3 The letters "a" and "b" in the figure represent ports, K1 is the Hall switch output, K2 is the lifting control input, K3 is the lifting control output, K4 is the emergency door opening control, K5 is the emergency door closing control, V+ is the power supply, GND is the power ground, H is the Hall switch, NS is the permanent magnet, F is the inverter, Y1 is the double AND gate (i.e. the first double AND gate circuit), Y2 is the double AND gate (i.e. the second double AND gate circuit), AJ is the emergency button; N is the north pole of the permanent magnet, and S is the south pole of the permanent magnet.

[0077] like Figure 3As shown, the working principle of the car control switch is: when the elevator door is fully closed, the Hall switch (i.e., the second detection component) outputs a high level K1 to the AND gate Y1a. When the elevator door control system outputs a high level lifting signal K2 to the AND gate Y1b, the two input ends of the AND gate Y1 are simultaneously high level, so the AND gate 1 (i.e., the first double AND gate circuit) outputs a high level signal K3 to the car lifting control system to control the car lifting. If the elevator door is not fully closed, the Hall switch outputs a zero level to the AND gate Y1. At this time, even if the AND gate Y1 inputs a high level lifting signal K2, the AND gate 1 still outputs a zero level, and the car does not lift. The zero level output by the Hall switch is inverted to a high level by the inverter circuit F and input to the AND gate Y2. When the high level lifting signal is also input to the AND gate Y2a, since the inputs of the AND gate Y2 are all high levels, the AND gate Y2 outputs a high level to the emergency button AJ. This level outputs the emergency door opening control signal K4 to the door opening controller through the normally closed contacts 1 and 2 of the emergency AJ to control the elevator door to open. After the elevator door is opened, press the emergency button AJ, and the high level output by the AND door Y2 outputs the emergency door closing control signal to the door closing controller through the AJ normally open contacts 3 and 4 to control the elevator door to close. After the elevator door is closed, the Hall switch outputs a high level, indicating that the elevator door is closed. As mentioned above, the AND door Y1 outputs the K2 control signal to control the lift.

[0078] like Figure 3 As shown, the elevator control device for the car provided by the embodiment of the present invention is controlled in this way: after the elevator door is completely closed, if the control system outputs a lifting control signal K2, the elevator car is controlled to lift. If the K2 signal is input and the Hall switch output is zero, it proves that the elevator door is not closed, and the safety control device outputs an emergency door opening signal K3 to control the elevator door to open. After the elevator door is opened, pressing the emergency button AJ can output K4 to control the elevator door to close. After the elevator door is closed, the elevator can resume lifting. The elevator car is lifted and lowered. This is how the present invention eliminates accidents in which people are trapped by the elevator door and cause casualties during elevator lifting. If the control system outputs a lifting control signal when the elevator door is not closed, the safety control device of the present invention can convert the lifting control signal into a control signal to open the elevator door in real time to control the elevator door to open automatically. After the passenger leaves the elevator door, he presses the emergency button AJ, and the lifting control signal is converted into a door closing control signal. After the elevator door is closed, the car can automatically resume lifting. The control principle is shown in FIG. Figure 3 ,

[0079] Beneficial effects of the invention: The invention is a safety device to prevent car elevator doors from inducing casualties. Accidents in which people are injured or killed during the lifting of the car after being caught by the doors account for about 80% of car elevator accidents. About 3 billion people take car elevators every day in the world, so the probability of accidents is relatively high. The present invention is used to improve existing car elevators, or the device is integrated into the car elevator control system as a product component during the manufacturing process of the car elevator, which can technically eliminate door accidents and ensure the safety of passengers. The device can be installed on the platform isolation doors of high-speed railways and subways to prevent personal injury accidents that may occur when passengers are caught by the platform isolation doors when the train starts. The safety device automatically monitors whether the car elevator door is fully closed; 2. The lifting and lowering instructions output by the existing car elevator control system are no longer directly input into the control car lifting and lowering control system, but are input into the safety device; 3. The safety device determines whether the car can be lifted or lowered based on whether the elevator door is fully closed: if the elevator door is fully closed, the safety device inputs the lifting and lowering instructions to the lifting and lowering control system to control the safe lifting and lowering of the car; if the elevator door is not fully closed, the safety device outputs an emergency door opening instruction; 4. There is an emergency button, which generates emergency automatic door opening and manual door closing through the button and automatically restores the normal operation of the car.

[0080] like Figure 3 As shown, further, the emergency control mechanism 2 includes: a first double AND gate circuit 3, a second double AND gate circuit 4, an inverter 5 and a normally open / normally closed composite emergency button 6, the elevator door travel detection mechanism 1 is connected to the first double AND gate circuit 3 and the inverter 5, and the second double AND gate circuit 4 is connected to the first double AND gate circuit 3, the inverter 5 and the normally open / normally closed composite emergency button 6;

[0081] The emergency control mechanism 2 is also used to convert the car lifting command into an emergency door opening command when the elevator door is not closed;

[0082] The emergency control mechanism 2 is also used to control the elevator door to reopen according to the emergency door opening instruction.

[0083] The beneficial effect of adopting the above further solution is that if the elevator door is not closed, the control system outputs the car lifting command, which is automatically converted by the device into an output emergency door opening signal to control the elevator door to reopen so that the passengers can escape from danger. This prevents the elevator from starting to lift before the door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0084] The first double AND gate circuit and the second double AND gate circuit may be the same double AND gate circuit.

[0085] like Figure 3As shown, further, the elevator door travel detection mechanism 1 includes: a first detection component 7 for detecting the elevator door travel and a second detection component 8 for detecting the elevator door travel, the first detection component 7 is arranged on the elevator door, the second detection component 8 is arranged on the car door frame 9, the first detection component 7 and the second detection component 8 are arranged correspondingly, and the second detection component 8 is arranged adjacent to the car control panel 10;

[0086] The emergency control mechanism is also used to determine whether the user inputs an emergency key command;

[0087] The emergency control mechanism is also used to control the elevator door to close when the user inputs an emergency key command.

[0088] The beneficial effect of adopting the above further solution is that after the user escapes from danger, the emergency button can be pressed to control the elevator door to close again, which is convenient for the user to escape from danger, prevents the elevator from causing harm to the user, prevents the elevator from starting to lift before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0089] The first detection component 7 may be a permanent magnet, and the second detection component 8 may be a Hall switch. The second detection component is connected to the emergency control mechanism.

[0090] like Figure 2 As shown, the elevator of the embodiment of the present invention may include: a car 11, a left ladder door 12, a car door frame 13, a right ladder door 14, a second detection component 8 (i.e., a Hall switch), a first detection component 7 (i.e., a permanent magnet), a car control panel 10, and a connecting cable 15. The car door frame 13 is arranged on the car 11, the left ladder door 12 and the right ladder door 14 are slidably arranged in the car door frame 13, the car control panel 10 is arranged on the inner wall of the car 11, the second detection component 8 is arranged on the car door frame 13, the first detection component 7 is arranged on the right ladder door 14, and the second detection component 8 is connected to the car control panel 10 via the connecting cable 15. The normally open / normally closed composite emergency button 6 can be arranged on the car control panel 10.

[0091] Furthermore, the elevator door travel detection mechanism 1 is a micro switch, a mercury switch, an infrared electronic switch or a Hall electronic switch;

[0092] The emergency control mechanism is also used to control the lifting of the car.

[0093] The beneficial effect of adopting the above further solution is that after the user inputs the emergency button command and the elevator door is closed, the lifting permission command is output, and the elevator car starts to lift safely when the lifting signal is output. This prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the elevator car.

[0094] Furthermore, the emergency control mechanism is also used to control the lifting of the car when the elevator door is closed.

[0095] The beneficial effect of adopting the above further solution is that only when the elevator door is completely closed, the car lifting instruction is output to control the car lifting, which prevents the elevator from lifting before the elevator door is closed, prevents the occurrence of elevator injuries, and improves the safety of the car elevator.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A car elevator control device, characterized in that: include: A door travel detection mechanism for detecting whether the door is fully closed and an emergency control mechanism for controlling emergency opening and closing of the door and lifting of the car, wherein the door travel detection mechanism is connected to the emergency control mechanism; The elevator door travel detection mechanism is used to detect whether the elevator door is closed before the elevator car is raised or lowered; The emergency control mechanism is used to control the elevator door to reopen when the elevator door is not closed; The emergency control mechanism comprises: a first double AND gate circuit, a second double AND gate circuit, an inverter and a normally open / normally closed composite emergency key, the elevator door travel detection mechanism is connected to the first double AND gate circuit and the inverter, and the second double AND gate circuit is connected to the first double AND gate circuit, the inverter and the normally open / normally closed composite emergency key; The emergency control mechanism is also used to convert the car lifting command into an emergency door opening command when the elevator door is not closed; The emergency control mechanism is further used to control the elevator door to reopen according to the emergency door opening instruction; The elevator door travel detection mechanism comprises: a first detection component for detecting the elevator door travel and a second detection component for detecting the elevator door travel, the first detection component is arranged on the elevator door, the second detection component is arranged on the car door frame, the first detection component and the second detection component are arranged correspondingly, and the second detection component is arranged adjacent to the car control panel; The emergency control mechanism is also used to determine whether the user inputs an emergency key command; The emergency control mechanism is also used to control the elevator door to close when the user inputs an emergency key command; When the elevator door is fully closed, the second detection component outputs a high level K1 to the AND gate Y1a. When the elevator door control system outputs a high level lifting signal K2 to the AND gate Y1b, the two input ends of the AND gate Y1 are both high level. Therefore, the first double AND gate circuit outputs a high level signal K3 to the car lifting control system to control the car lifting. If the elevator door is not fully closed, the second detection component outputs a zero level to the AND gate Y1. At this time, even if the AND gate Y1 inputs a high level lifting signal K2, the first double AND gate circuit still outputs a zero level, and the car does not lift. The zero level output by the second detection component is inverted by the inverting circuit F to a high level and input to the AND gate Y2. Among them, the inverting circuit F is an inverter. When When the high-level lifting and lowering signal is also input into the AND gate Y2a, since the inputs of the AND gate Y2 are all high-level, the AND gate Y2 outputs a high-level signal to the emergency button AJ, and the AND gate Y2 outputs a high-level signal through the first normally closed contact and the second normally closed contact of the emergency button AJ to output the emergency door opening control signal K4 to the door opening controller to control the elevator door to open; after the elevator door is opened, press the emergency button AJ, and the high-level signal output by the AND gate Y2 outputs an emergency door closing control signal through the first normally open contact and the second normally open contact of the emergency button AJ to the door closing controller to control the elevator door to close; after the elevator door is closed, the second detection component outputs a high level, indicating that the elevator door is closed, and the AND gate Y1 outputs the K2 control signal to control the lifting and lowering of the car.

2. A car elevator control device according to claim 1, characterized in that: The elevator door travel detection mechanism is a micro switch, a mercury switch, an infrared electronic switch or a Hall electronic switch; The emergency control mechanism is also used to control the lifting of the car.

3. A car elevator control device according to claim 1, characterized in that: The emergency control mechanism is also used to control the lifting of the car when the elevator door is closed.

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