JP2019112201A - Elevator - Google Patents

Abstract

To improve the safety when opening a landing door of an elevator manually.SOLUTION: An elevator 100 includes a falling prevention door 101 installed at a landing 107 of each floor for the elevator, warning lightings 102 arranged respectively at portions facing landing doors 103 of each floor in a hoistway 108, and a control panel 200 controlling the opening/closing of the falling prevention door 101 and the lighting-on/lighting-off of the warning lightings 102. The control panel 200 releases the controlling of the opening/closing of the falling prevention door 101 during the maintenance and inspection and makes the warning lighting 102 disposed at a floor of the landing 107 turn on when a difference between a ceiling height of a car 105 and a story floor height of the landing 107 and a difference between a floor height of the car 105 and a story floor height exceed predetermined ranges respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a safety device at the time of maintenance and inspection of an elevator. In particular, the present invention relates to a technique for preventing a worker from falling into a hoistway during maintenance and inspection.

  At times other than normal operation, such as maintenance and inspection work of elevators, the landing door may be manually opened to get on the car. Under the present circumstances, as a technique which avoids falling to the inside of a hoistway, to patent document 1, "The switch which detects external opening operation in a hall door, the alerting | reporting apparatus operate | operated in synchronization with this detection, illuminating devices, and these power supplies A safety device for an elevator hall door is disclosed, in which a safety device with a single device is provided in the vicinity of a hall door outer opening hole or in an outer opening jig (abstract excerpt).

Unexamined-Japanese-Patent No. 11-29243

  According to the above-mentioned technology, a warning is issued before the elevator landing door is opened. However, no consideration is given to the safety for the operation after the landing door is opened.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a technique for improving the safety when the landing door of the elevator is manually opened.

  According to the present invention, there are provided a fall prevention door installed at a landing of each floor of an elevator, a warning illumination disposed in a hoistway at a position facing the landing door of each floor, opening and closing of the fall prevention door, and A control panel for controlling turning on / off of the warning light, wherein the control panel cancels the control of the opening / closing of the fall prevention door at the time of maintenance inspection, and the ceiling height of the car and the floor of the landing When the difference between the height and the difference between the floor height of the car and the floor height is more than a predetermined range, the warning lighting disposed on the floor of the landing is illuminated. And provide an elevator.

  According to the present invention, the safety when the elevator landing door is manually opened is improved. In addition, the subject except having mentioned above, a structure, and an effect are clarified by description of the following embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram of the elevator of embodiment of this invention. (A) And (b) is an explanatory view for explaining a fall prevention door of an elevator of an embodiment of the present invention. (A) And (b) is an explanatory view for explaining a fall prevention door of an elevator of an embodiment of the present invention. (A) is a functional block diagram of the control panel of the embodiment of the present invention, (b) is a hardware configuration diagram of the control panel of the embodiment of the present invention. It is a flowchart of lighting control processing for warning of an embodiment of the present invention. It is a flowchart of the lighting on / off process of the illumination for warning of embodiment of this invention. It is an explanatory view for explaining lighting on / off of warning lighting of an embodiment of the present invention. It is an explanatory view for explaining lighting on / off of warning lighting of an embodiment of the present invention. It is a flow chart of control processing of a fall prevention door of an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, in the present specification, components having the same function are denoted by the same reference symbols unless otherwise specified, and the repetitive description will be omitted.

  FIG. 1 is an entire configuration diagram of an elevator 100 according to an embodiment of the present invention. The elevator 100 according to this embodiment includes a car 105, a landing door 103, a fall prevention door 101, a car door 104, a counterweight 113, a hoist 112, a control panel 200, and a main rope 106. The transmission path 110, the warning light 102, and the mode switch (SW) 111 are provided.

  In the elevator 100, the car 105 is connected to the counterweight 113 via the main rope 106. By driving the main rope 106 with the hoisting machine 112, the car 105 and the counterweight 113 move up and down in the hoistway 108 in a fishing bottle manner. The hoisting machine 112 is driven in accordance with a control signal from the control board 200.

  The mode switching SW 111 receives an instruction to switch the operation mode of the elevator 100. The elevator 100 of the present embodiment has a normal operation mode and a maintenance operation mode. The normal operation mode is an operation mode selected during normal operation, and the maintenance operation mode is an operation mode selected during maintenance and inspection work. The mode switching SW 111 receives an instruction for transition from the normal operation mode to the maintenance operation mode, and receives an instruction for transition from the maintenance operation mode to the normal operation mode.

  The mode switching SW 111 is installed, for example, inside the car 105. Then, when pressing by the operator 109 is received, the SW signal is output to the control board 200. In the control board 200, when the SW signal is received, the operation mode is switched.

  The landing door 103 is installed at the landing 107 of each floor. Further, the car door 104 is disposed in the car 105. In the normal operation mode, the control panel 200 controls the operation of the landing door 103 and the car door 104. For example, when the car 105 arrives at each floor, control is performed so that the car door 104 and the landing door 103 are interlocked and opened and closed. On the other hand, in the maintenance operation mode, control on each door is released so that it can be opened and closed manually.

  Furthermore, the elevator 100 according to the present embodiment includes the fall prevention door 101 and the warning light 102 on each floor. The control panel 200 controls the opening / closing of the fall prevention door 101 and the lighting and extinguishing of the warning light 102.

  The warning light 102 is disposed at a position in the hoistway 108 that can be seen by the worker 109 at the landing 107 in each floor without the car 105 and the landing door 103 being open. For example, it is disposed on a wall surface (a facing position) in a position facing the landing door 103 of each floor in the hoistway 108. It is desirable that the warning light 102 be, for example, red, orange, yellow, or any other color that can notify the worker 109 of the danger.

  In the maintenance operation mode, the warning light 102 has a floor height (floor height) of the landing 107 of each floor and a ceiling height of the car 105 (ceiling height) or a floor height of the car 105. The lighting and extinguishing are controlled by the control panel 200 according to the relationship with the height (floor height). The details of lighting control by the control panel 200 will be described later.

  The fall prevention door 101 is provided in such a manner that the safety of the worker 109 can be secured in the maintenance operation mode without interfering with the passenger getting on and off in the normal operation mode. For example, in the normal operation mode, it engages with the landing door 103 and operates in conjunction with the landing door 103. On the other hand, in the maintenance operation mode, it operates independently. In the maintenance operation mode, the control panel 200 does not receive control, and for example, it can be manually opened and closed using an external opening jig or the like.

  In addition, the fall prevention door 101 is installed at a place where the operation of the landing door 103 or the operation of other components in the hoistway 108 of the elevator 100 is not hindered. FIG. 2A is a view of the elevator 100 from the landing 107 on the floor where the car 105 is seated. Moreover, FIG.2 (b) is sectional drawing of Fig.2 (a). As shown in these figures, the fall prevention door 101 is disposed, for example, between the car door 104 and the landing door 103 in a state where the car 105 is landing.

  Furthermore, the fall prevention door 101 prevents the worker 109 from falling onto the hoistway 108 when the car 105 is not disposed at a position where the worker 109 can get in during the maintenance operation mode. In the form that can notify the danger.

  FIG. 3A is a view of the elevator 100 from the landing 107 on the floor where the car 105 is not landing. Moreover, FIG.3 (b) is sectional drawing of Fig.3 (a). As shown in these figures, for example, the fall prevention door 101 has a height that can not be overcome even if the worker 109 falls, and a strength that can not be broken even if the worker 109 falls. For example, the fall prevention door 101 has the same size as the landing door 103. For example, it is made of a material having a strength substantially equal to that of the car door 104 and a material having a thickness. Thus, even in the maintenance operation mode, even if the landing door 103 is opened by the external opening jig, the worker 109 can be prevented from falling into the hoistway 108.

  In addition, the fall prevention door 101 has a structure in which the line of sight of the worker 109 is not completely blocked. For example, it is set as the structure which used the material which has transmissivity at least one part, such as a transparent board. Moreover, it may be a fence-like, lattice-like, or net-like configuration. As a result, in the maintenance operation mode, when the landing door 103 is opened by the external opening jig, the worker 109 can see the lit warning illumination 102 and can grasp the danger.

  The size and the material of the fall prevention door 101 are not limited to those described above. When the landing door 103 is opened in the maintenance operation mode, the worker 109 can be prevented from falling into the hoistway 108, and the size and the material can be arbitrarily set as long as the danger can be notified.

  Further, the elevator 100 includes a rotation amount detection sensor 121 and a brake operation detection sensor 122 as sensors for detecting various states in the elevator 100.

  The rotation amount detection sensor 121 is attached to the hoisting machine 112, detects the rotation amount of the hoisting machine 112, and outputs it to the control board 200. For example, an encoder or the like is used.

  The brake operation detection sensor 122 detects the operation of the brake attached to the hoisting machine 112 and outputs it to the control board 200.

  Next, the function of the control panel 200 for realizing the above control will be described. FIG. 4A is a functional block diagram of the control panel 200 of the present embodiment. Here, a description will be given focusing on the function related to the drop prevention processing of the worker 109 in the maintenance operation mode.

  The control panel 200 of the present embodiment includes a warning illumination control unit 210, a fall prevention door opening / closing control unit 220, an operation control unit 230, and a mode determination unit 240.

  Mode determination unit 240 determines the operation mode of elevator 100 in accordance with the SW signal from mode switching SW 111. In the present embodiment, for example, an operation mode flag is set in the maintenance operation mode. For example, when the current operation mode is the normal operation mode, when the SW signal is received, the operation mode flag is set. On the other hand, when the current operation mode is the maintenance operation mode, that is, when the operation mode flag is set, when the SW signal is received, the operation mode flag is released.

  The warning light control unit 210 controls lighting and extinguishing of the warning lights 102 of each floor in the maintenance operation mode. The warning lighting control unit 210 determines whether or not the warning lighting 102 should be turned on for each floor according to the position of the car 105, and performs control according to the determination result. For example, in the maintenance operation mode, the warning light control unit 210 outputs a control signal to the warning light 102 to turn on the light when the car 105 is not disposed at a position where the worker 109 can get in.

  Specifically, in the maintenance operation mode, the absolute value of the difference between the floor position (floor height) and the ceiling position (ceiling height) of the car 105 is a predetermined value or more, and the floor If the absolute value of the difference between the floor height and the floor position (floor height) of the car 105 is equal to or greater than a predetermined value, the light is turned on. For this reason, the warning light control unit 210 first confirms whether or not the maintenance operation mode is in place, and then checks whether or not the car 105 is stopped, and if it is stopped, the floor Each time, the relationship between the stop position and the floor is determined.

  Whether the car 105 is stopped or not, the relationship between the stop position and the floor is determined by the output of the rotation amount detection sensor 121 or the brake operation detection sensor 122. Further, the stop position of the car 105 is calculated by the output of the rotation amount detection sensor 121. Details of the on / off processing will be described later.

  The fall prevention door opening / closing control unit 220 controls the opening / closing of the fall prevention door 101. In the present embodiment, in the normal operation mode, the fall prevention door 101 is controlled to open and close in conjunction with the landing door 103. It may be operated in conjunction with the car door 104. On the other hand, in the maintenance operation mode, this cooperation is released. Generally, in the maintenance operation mode, the control from the control panel 200 is released and the landing door 103 can be manually opened and closed. In the present embodiment, the fall prevention door 101 is similarly released from the control of the fall prevention door opening / closing control unit 220 and can be manually opened and closed.

  The operation control unit 230 controls the overall operation operation of the elevator 100 such as the operation of the car 105 and the opening and closing of the landing door 103 in the normal operation mode. Further, in the maintenance operation mode, the car 105 is operated in accordance with an instruction from the worker 109. For example, according to an instruction from the worker 109, the car 105 is operated to a position where the floor height of the car 105 becomes equal to the floor height of the predetermined landing 107, or the ceiling height of the car 105 is the predetermined landing 107 The car 105 is operated to a position equal to the floor height of the vehicle.

  The control panel 200 is realized by, for example, an information processing apparatus including a CPU 251, a memory 252, a storage device 253, and an external device interface (I / F) 254 as shown in FIG. 4B. . For example, each function is realized by the CPU 251 loading a program stored in advance in the storage device 253 into the memory 252 and executing the program.

  In addition, the operation mode flag is set, for example, in the memory 252. Further, data used to execute each process described later, data generated during execution, and data obtained as a result of execution are stored in, for example, the storage device 253 or the memory 252. Further, signals from the mode switch SW 111, the rotation amount detection sensor 121, and the brake operation detection sensor 122 are input via the external device I / F 254. Further, control signals to the warning light 102 and the fall prevention door 101 are similarly output via the external device I / F 254.

  Note that part or all of each function may be realized by hardware, for example, by designing as an integrated circuit.

  Next, a flow of warning lighting control processing by the warning lighting control unit 210 of the present embodiment will be described. FIG. 5 is a process flow of the warning illumination control process of the present embodiment. The following processing is repeatedly performed at predetermined time intervals.

  First, the warning illumination control unit 210 determines whether or not the maintenance operation mode is set (step S1101). Whether or not it is the maintenance operation mode is determined by whether or not the operation mode flag is set. That is, if the operation mode flag is set, it is determined that the maintenance operation mode is set. Here, if it is not the maintenance operation mode, the process is ended as it is.

  If the maintenance operation mode is selected in step S1101, the warning illumination control unit 210 determines whether the car 105 is stopped (step S1102). Whether the car 105 is stopped or not is calculated by using the rotation amount detected by the rotation amount detection sensor 121 to calculate the elevating speed of the car 105. If the elevating speed is zero, it is determined that the car 105 is stopped. If the brake is operating, it may be determined as a stop from the output of the brake operation detection sensor 122. If the car 105 is not stopped, the process is terminated.

  The determination as to whether or not the maintenance operation mode is in effect and the determination as to whether or not the car 105 is stopped may be performed first.

  Next, when the warning lighting control unit 210 is in the maintenance operation mode and the car 105 is stopped, the lighting control unit 210 performs lighting on / off control of the warning lighting 102 (step S1103), and ends the process. The details of the on / off control of the warning light 102 will be described later.

  Next, the flow of the on / off control process of the warning illumination 102 by the warning illumination controller 210 in step S1103 will be described. FIG. 6 is a process flow of the on / off control process of the present embodiment.

  The warning light control unit 210 compares the height of the floor (floor height) with the height of the floor of the car 105 and the height of the ceiling for each floor, and the difference between them is a predetermined range In the above case, the warning light 102 is turned on. Conversely, when at least one of the differences is within a predetermined range, the warning light 102 is turned off.

  The height of the floor surface of the car 105 from the bottom of the hoistway 108 is hereinafter referred to as the floor height Hb, and the height of the ceiling of the car 105 from the bottom of the hoistway 108 is referred to as the ceiling height Hc. Do. Moreover, the elevator 100 of this embodiment shall have a floor of N-th floor (N is an integer greater than or equal to 1). The height (floor height) Hf (n) from the lowermost surface of the floor 108 of the landing floor 107 of the n-th floor is assumed to be predetermined as a design value. In addition, n is a counter which counts a floor.

  First, the warning illumination control unit 210 calculates the floor height Hb of the car 105 (step S1201). The stop position of the car 105 is used as the floor height Hb of the car 105. The stop position is obtained by calculating the current position of the car 105 from the rotation amount detected by the rotation amount detection sensor 121.

  Next, the ceiling height Hc of the car 105 is calculated (step S1202). The ceiling height Hc is obtained by adding the height of the car 105 which is a design value to the calculated floor height Hb.

  Then, for each floor, it is determined whether or not lighting is necessary. Here, first, the floor counter n is initialized (n = 1) (step S1203).

  First, the warning illumination control unit 210 calculates the absolute value ΔHb (ΔHb = | Hf (n) −Hb |) of the difference between the floor height Hf of the n-th floor and the floor height Hb (step S1204). ). Then, the absolute value ΔHb of the difference is compared with a predetermined floor height threshold (floor height threshold Thb) (step S1205).

  If the absolute value ΔHb of the difference is not the floor height threshold Thb or more (step S1205; No), that is, if ΔHb is smaller than Thb, the warning illumination control unit 210 turns off the warning illumination 102 on the nth floor (step S1209).

  When the absolute value ΔHb of the difference is the floor height threshold Thb or more (step S1205; Yes), the warning illumination control unit 210 determines the absolute value of the difference between the floor height Hf (n) of the nth floor and the ceiling height Hc. ΔHc (ΔHc = | Hf (n) −Hc |) is calculated (step S1206). Then, the absolute value ΔHc of the difference is compared with a predetermined ceiling height threshold (ceiling height threshold Thc) (step S1207).

  If the absolute value ΔHc of the difference is not the ceiling height threshold Thc or more (step S1207; No), that is, if ΔHc is smaller than Thc, the warning illumination control unit 210 turns off the warning illumination 102 on the nth floor (step S1209).

  If the absolute value ΔHc of the difference is greater than or equal to the ceiling height threshold Thc (step S1207; Yes), the warning illumination control unit 210 turns on the warning illumination 102 on the nth floor (step S1208).

  The above process is repeated to the N-th floor (steps S1210 and S1211), and the process ends.

  In the above process, the floor height threshold Thb is set to a height at which the worker 109 can safely get on the car 105 when the landing door 103, the fall prevention door 101, and the car door 104 are opened. For example, it is about 5 cm.

  The ceiling height threshold Thc is set to a height at which the worker 109 can safely get on the ceiling of the car 105 when the landing door 103, the fall prevention door 101, and the car door 104 are opened. Be done. For example, it is about 5 cm.

  For example, the case where the car 105 is at the position shown in FIG. 7, that is, when the car 105 is stopped at a height of about 1 st floor, will be described as an example. The floor height Hf of the first floor and the floor height Hb of the car 105 are approximately equal. Therefore, in the first floor, the absolute value of the difference ΔHb becomes smaller than the floor height threshold Thb, and the warning illumination 102a on the first floor is turned off. In this case, the worker 109 can get into the car 105 by opening the landing door 103, the fall prevention door 101 and the car door 104, and does not fall into the hoistway 108.

  On the other hand, the floor height Hf of the second floor, the floor height Hf of the third floor, and the floor height Hb of the car 105 are larger than the floor height threshold Thb. Therefore, next, the ceiling height Hc of the car 105 is compared with the floor heights Hf (2) and Hf (3). In either case, since the absolute value of the difference is greater than the ceiling height threshold Thc, the warning lights 102b and 102c on the second and third floors are turned on.

On the other hand, when the car 105 is stopped at the position shown in FIG. 8, that is, the case where the ceiling height of the car 105 is stopped at the same position as the floor height on the second floor is taken as an example. Do.
The absolute value of the difference between the first floor floor height Hf (1) and the floor height Hb of the car 105 is larger than the floor height threshold Thb. Further, the absolute value of the difference between the floor height Hf (1) of the first floor and the ceiling height Hc of the car 105 is larger than the ceiling height threshold Thc. Therefore, the warning light 102a on the first floor is turned on.

  The absolute value of the difference between the second floor floor height Hf (2) and the floor height Hb of the car 105 is larger than the floor height threshold Thb. However, the floor height Hf (2) of the second floor and the ceiling height Hc of the car 105 are substantially the same. Therefore, the absolute value of the difference between the two is smaller than the ceiling height threshold Thc. Therefore, the warning light 102b on the second floor is turned off. In this case, the worker 109 can get on the car 105 by opening the landing door 103, the fall prevention door 101 and the car door 104 on the second floor, and does not fall into the hoistway 108.

  The absolute value of the difference between the floor height Hf of three times and the floor height Hb of the car 105 is larger than the floor height threshold Thb. Further, the absolute value of the difference between the floor height Hf (3) of the third floor and the ceiling height Hc of the car 105 is larger than the ceiling height threshold Thc. Therefore, the warning light 102c on the third floor is turned on.

  The warning lighting control unit 210 controls lighting and extinguishing of the warning lighting 102 as described above. As a result, even in the maintenance operation mode, even if the car 105 is moved for maintenance, the necessary floor warning light 102 is turned on according to the position at which the car 105 is stopped, and unnecessary floors The floor warning light 102 can be turned off.

  In the above process, although the floor height threshold Thb and the ceiling height threshold Thc are separately set, the present invention is not limited thereto. Both thresholds may use the same value.

  Next, the flow of control processing by the fall prevention door opening / closing control unit 220 will be described using FIG. The fall prevention door opening / closing control unit 220 executes processing when the mode determination unit 240 receives the SW signal from the mode switch SW 111. That is, the fall prevention door opening / closing control unit 220 monitors the operation mode flag of the mode determination unit 240 at predetermined time intervals, and executes the process when it is changed.

  The fall prevention door opening / closing control unit 220 determines whether the operation mode after switching is the maintenance operation mode (step S1301). The determination is performed by referring to the operation mode flag. If the operation mode after switching is not the maintenance operation mode, control is performed so as to be interlocked with the landing door 103 (step S1303), and the process is ended.

  On the other hand, in the case of the maintenance operation mode, the interlock with the landing door 103 is released, the operation control is also released (step S1302), and the process is ended.

  As described above, the elevator 100 according to the present embodiment includes the fall prevention door 101 which is not interlocked with the landing door 103 in the maintenance operation mode. And this fall prevention door 101 is formed by the size and the material which can prevent the fall of the worker 109 to the hoistway 108.

  Further, according to the present embodiment, in the maintenance operation mode, the warning illumination 102 provided in association with the landing position of each floor in the hoistway 108 is lit as necessary. For example, the warning light 102 is turned on except when the car 105 is stopped at a position where the worker 109 can get in the car 105 or on the ceiling of the car 105.

  The fall prevention door 101 of the present embodiment further has transparency. Therefore, when the car 105 is stopped at a position where the worker 109 can not get in, the worker 109 can see the lighting of the warning light 102 over the fall prevention door 101.

  Therefore, according to the present embodiment, the worker 109 can easily grasp the danger when the landing door 103 is manually opened in the maintenance operation mode. That is, according to the present embodiment, the worker 109 can be appropriately alerted. Thus, according to the present embodiment, it is possible to reduce the possibility of the worker 109 falling into the hoistway, and to provide the elevator 100 with high safety.

  In the above embodiment, in the maintenance operation mode, the control from the fall prevention door opening / closing control unit 220 for the fall prevention door 101 is released to enable manual opening and closing, but the present invention is not limited thereto. In the maintenance operation mode, the fall prevention door opening / closing control unit 220 may control so that the fall prevention door 101 can be opened only when the possibility that the worker 109 falls into the hoistway 108 is eliminated.

  In this case, for example, when it is determined that the worker 109 is not likely to fall in the maintenance operation mode, the fall prevention door opening / closing control unit 220 outputs a control signal to open the fall prevention door 101. As in the case of the warning light control unit 210, for example, the presence or absence of the worker 109 falling is determined based on the relationship between the stop position of the car 105 and the floor height of the landing 107 where the worker 109 is located. .

  In addition, the fall prevention door 101 is provided with a lock mechanism that can be opened and closed from the control panel 200, and the fall prevention door open / close control unit 220 locks when it is determined that the worker 109 is not likely to fall in the maintenance operation mode. It may be configured to output a release instruction.

  The present invention is not limited to the above embodiment, but includes various modifications. For example, the above-described embodiment is for describing the present invention in an easy-to-understand manner, and is not necessarily limited to one having all the described configurations. Further, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, and replace other configurations for part of the configurations of the respective embodiments.

  Further, control lines and information lines indicate what is considered to be necessary for the description, and not all control lines and information lines in the product are necessarily shown. In practice, almost all configurations may be considered to be mutually connected.

100: Elevator, 101: Fall prevention door, 102: Warning light, 102a: Warning light, 102b: Warning light, 102c: Warning light, 103: Ground door, 104: Car door, 105: Car, 106 A: Main rope, 107: landing, 108: hoistway, 109: worker, 110: transmission path, 111: mode switching SW, 112: hoisting machine, 113: counterweight, 121: rotation amount detection sensor, 122: brake Motion detection sensor,
200: control panel, 210: warning light control unit, 220: fall prevention door opening / closing control unit, 230: operation control unit, 240: mode determination unit, 251: CPU, 252: memory, 253: storage device, 254: external Equipment I / F,
Hb: Floor height, Hc: Ceiling height, Hf: Floor height, Thb: Floor height threshold, Thc: Ceiling height threshold

Claims (4)

Fall prevention doors installed at each elevator floor,
Warning lights disposed in the hoistway at positions facing the landing door of each floor,
A control panel for controlling opening / closing of the fall prevention door and turning on / off of the warning light;
The control panel cancels the control of the opening and closing of the fall prevention door at the time of maintenance inspection, and the difference between the ceiling height of the car and the floor height of the landing, and the floor height of the car and the floor An elevator characterized in that the warning lights disposed on the floor of the landing are lit when the difference with the floor height is more than a predetermined range. The elevator according to claim 1, wherein
The fall prevention door is transparent, and is disposed between the car door of the car and the landing door of the floor on which the car is landing, with the car landing. An elevator characterized by being. The elevator according to claim 1 or 2, wherein
An elevator characterized in that the control panel operates the fall prevention door interlocking with at least one of the landing door and the car door during normal operation. The elevator according to claim 2, wherein
An elevator, wherein the fall prevention door has approximately the same size as the landing door and approximately the same strength as the car door.

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