JP2012144328A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that an accurate stop position of a car of a broken elevator machine cannot be acquired when a car position pulse outputted from the broken elevator machine is abnormal.SOLUTION: The elevator includes: cars 5, 24; reflectors 39, 40; reflective sensors 6, 36 which project optical beams with the optical axes being turned to sidewall surfaces 17, 51, and receive light reflected by the side wall surfaces 17, 51 and the reflectors 40, 39; sensor control circuits 37, 38 which on/off-drive the sensors 6, 36 and detect changes in the optical quantity of the received light and changes in the incident angle of the received light; hoists 7, 28 which drive each car 5, 24 to move up and down and output each car position signal; and operation control units 9, 27 which perform the operation control of elevator machines 1, 2 and perform rescue operation with the car 24 as a car to be rescued and the car 5 as a rescue car. The operation control unit 9 travels the car 5 while outputting projecting light beam from the sensor 6, and stops the car 5 at a position where the change in light quantity and the change in incident angle are detected by the sensor 6.

Description

  One embodiment relates to an elevator.

  In an elevator equipped with a plurality of elevators, if a passenger is trapped due to an abnormality such as a failure in any of the elevators, the car of the adjacent car (elevator car) goes to the stop position of the car of the failed car To land. An operation (automatic rescue operation) is performed in which the car of the adjacent car rescues the person trapped in the car of the trouble car from the side rescue door. Conventionally, the elevator notifies the rescue car of a car position pulse signal indicating the car position, and the elevator moves to the car position of the faulty car.

JP 2007-119102 A JP 2008-120558 A JP 2004-123315 A

  However, in the above-described conventional technology, when the car position pulse signal output from the failed car is abnormal, it is not possible to acquire the exact stop position of the car of the failed car. If the car position pulse signal is no longer output from the faulty car, the stop position of this car cannot be acquired. The operation control device of the rescue car cannot accurately match the position of the car of the rescue car with the position of the car of the trouble car using the car position pulse signal from the trouble car.

  In order to solve such a problem, according to one embodiment of the present invention, a plurality of hoistways provided in the same hoistway space are raised and lowered, and a plurality of cars each having a rescue exit are provided for each of these cars. A light reflecting plate provided on the outside of each car and a light beam provided for each of the plurality of cars and having an optical axis directed to a side wall surface in the hoistway space across the adjacent hoistway. Reflective sensors that receive light reflected by the side wall surface and the reflecting plate, and these sensors are driven on and off to detect changes in the amount of received light and changes in the incident angle of the received light by each sensor. A sensor control circuit provided for each of the cars, a hoisting machine provided for each of the plurality of hoistways for driving each car up and down and outputting a car position signal of each car, the hoisting machine, and With the sensor control circuit A function to send and receive control signals and control the operation of each elevator, to treat each car with an abnormal car that outputs an abnormality in the car position signal as a rescue car, and to perform rescue operation using any normal car as a rescue car A plurality of operation control units, and among these operation control units, the operation control unit of the rescue car, while driving the rescue car while outputting a projection light beam from the sensor of the rescue car, An elevator is provided in which the rescue car is stopped at a position where the sensor control circuit detects a change in the light amount and the incident angle.

1 is a schematic configuration diagram of an elevator according to an embodiment of the present invention. It is a figure for demonstrating the detection method of the change of the light quantity of the received light by the elevator which concerns on embodiment of this invention, and the change of an incident angle. It is a figure which shows the structural example of the operation control apparatus used for the elevator which concerns on embodiment of this invention. It is a flowchart for demonstrating the control at the time of abnormality detection of the car position signal by the elevator which concerns on embodiment of this invention. It is a flowchart for demonstrating the automatic rescue driving method by the elevator which concerns on embodiment of this invention. It is a figure for demonstrating an example of the detection method of the light quantity change of the received light by the elevator which concerns on embodiment of this invention.

  Hereinafter, an elevator according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. In the drawings, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic configuration diagram of an elevator according to an embodiment of the present invention. In the elevator according to the present embodiment, the elevator 1 and the elevator 2 are provided in the same hoistway space 3.

  The elevator No. 1 includes a car 5 having a rescue exit by moving up and down the hoistway 4a in the hoistway space 3, and a photoelectric sensor 6 (reflective sensor) provided in the car 5 and having an optical axis directed to the side wall surface 17. ), A sensor control circuit 37 that drives the photoelectric sensor 6 on / off, a hoisting machine 7 that drives the car 5 up and down, and a car side control that controls the operation of the sensor control circuit 37 in the cage 5. An operation control device 9 (operation control unit) that exchanges control signals between the device 8 and the hoisting machine 7 and the car-side control device 8 to control the operation of the elevator 1, and the hoisting machine 7 The main sheave 10 that is driven to rotate, the main rope 11 (rope) that hangs around the main sheave 10 and suspends the car 5, and the counterweight that is hung by the main rope 11 and moves in the direction opposite to the ascending / descending direction of the car 5 And a C / W) 12.

  The car 5 includes a car frame 14 provided with two car sheaves 13 at the top, a car room 15 surrounded by the car frame 14, a side rescue door 16 serving as a rescue outlet in an emergency, and a reflecting surface directed toward the side wall surface 17. And an infrared reflecting plate 39 provided on the car frame 14 in a state where the car frame 14 is placed. A tail cord (not shown) is led outside the car frame 14 so that the car-side control device 8 and the operation control device 9 can communicate with each other. The car room 15 is provided with a display and a speaker for informing information. The side rescue door 16 has, for example, a tread plate, an arm and a hinge that supports the tread plate so as to be openable and closable. To bridge. The reflector 39 reflects a light beam from a photoelectric sensor attached to the car 24.

  The photoelectric sensor 6 includes a projector that projects a projection light beam horizontally across the adjacent hoistway 4 b on the side wall surface 17 in the hoistway space 3, reflected light from the side wall surface 17, and a reflector 40 of the car 24. And a light receiver that receives reflected light from the light source. The photoelectric sensor 6 is provided at the lower end of the car frame 14. The height of the mounting position of the photoelectric sensor 6 is adjusted to the position where the projection light beam irradiates the lower end of the car frame 31 of the car 24 when the height of the car 24 and the height of the car 5 are the same. Yes.

  FIG. 2 is a diagram for explaining a method of detecting a change in the amount of received light and a change in incident angle by the photoelectric sensor 6. The above described symbols represent the same elements. The photoelectric sensor 6 includes a housing 6a having a light window, a projector 41 that outputs a light beam having an infrared wavelength region, and a lens 44 that converges the light beam emitted from the projector 41 and projects it onto a target 43. The lens 45 that collects the light reflected by the object 43, the light receiver 46 that receives the light from the lens 45 and has reception sensitivity in the infrared wavelength region, and the calculation based on the difference between the output currents of the light receiver 46 is performed. An arithmetic circuit 50 and a substrate 47 that electrically connects the projector 41, the light receiver 46, and the arithmetic circuit 50 are provided. The object 43 includes the detection plate 40 of the car 24 when the car 5 is arranged next to the car 24 as shown in the position B, and the side wall surface 17 when the car 24 does not exist as shown in the position A. Point to.

  When the right side of the lens 44 is seen and the detection plate 40 is not present, the light beam is reflected by the side wall surface 17 and collected on the lens 45. When the detection plate 40 is present when looking right from the lens 44, the light beam is reflected by the detection plate 40 and collected on the lens 45. The light receiver 46 includes a first light receiving portion 48 and a second light receiving portion 49 that are divided into upper and lower portions with a plane passing through the center in the height direction as a boundary. The first light receiving unit 48 is composed of one or more photodiodes. The second light receiving unit 49 is also composed of one or more photodiodes. That is, the light receiver 46 has a two-divided photodiode configuration. On these first light receiving part 48 and second light receiving part 49, a light spot of reflected light is formed. The first light receiving unit 48 mainly receives reflected light with high intensity from the detection plate 40. The second light receiving unit 49 receives reflected light from the side wall surface 17. In the arithmetic circuit 50, the state of the photoelectric sensor 6 is such that the light receiving intensity of the second light receiving unit 49 is large and the light receiving intensity of the first light receiving unit 48 is small, and the light receiving intensity of the second light receiving unit 49 is small. It is monitored whether the received light intensity of 48 is high. The arithmetic circuit 50 constantly monitors the state by the output current.

  The sensor control circuit 37 in FIG. 1 detects changes in the amount of received light including reflected light from the side wall surface 17 and reflected light from the adjacent cage 24 and changes in the incident angle of the received light. The sensor control circuit 37 notifies the car-side control device 8 that a change in the light amount and incident angle of the received light has occurred.

  In addition, the hoisting machine 7 performs a raising / lowering driving operation for winding and unwinding the main rope 11 and outputs a car position pulse signal (car position signal) of the car 5. The hoisting machine 7 includes a hoisting motor 18 having a motor shaft, and a pulse generator 19 attached to the motor shaft. A main sheave 10 is attached to the motor shaft of the hoisting motor 18. The main rope 11 wound around the main sheave 10 is stretched between two car sheaves 13 and a counterweight sheave 20 provided on the upper part of the counterweight 12, respectively. It is fixed to the rope hitch 21 at the upper end of the hoistway space 3. The pulse generator 19 includes a pulse generator and an encoder, and outputs a car position pulse to the operation control device 9.

  The car-side control device 8 causes the photoelectric sensor 6 to start a detection operation via the sensor control circuit 37 in response to a command from the operation control device 9.

  FIG. 3 is a diagram illustrating a configuration example of the operation control device 9. In the same figure, peripheral devices of the operation control device 9 are also shown, and the above-described reference numerals represent the same elements. The operation control device 9 includes an operation control unit 9a that controls the operation of the car 5 by signals from the car-side control device 8 and the hall call registration device 22 on each floor, and the hoisting machine 10 with respect to the operation control unit 9a. A car position detection unit 9c that outputs a car position signal of the car 5 calculated based on the car position pulse signal and the height information of each floor stored in the storage unit 9b, and the car position of the car 5 via the signal cable 23 A transmission / reception unit 9d that transmits a signal to the operation control device 9 on the elevator 2 side and receives a car position signal on the elevator 2 side is provided.

  The operation control unit 9a supervises the execution of the automatic rescue operation. The operation control unit 9a assigns the car 5 as a rescue car or a rescued car. The car position detection unit 9c counts the number of car position pulses in accordance with the movement of the car 5, and the car position information of the car 5 that is running is calculated based on the counted value and the car position information of the car 5 before departure. Is output. When the transmission / reception unit 9d does not receive the car position pulse signal from the adjacent operation control device 27 or receives an abnormal value, the abnormality in the output of the car position pulse signal on the elevator unit 2 side is detected by the operation control unit 9a or the car. The position detector 9c detects.

  In FIG. 1, an elevator car 2 adjacent to the elevator car 1 includes a car 24 that moves up and down the hoistway 4 b and has a rescue outlet, and a photoelectric sensor that is provided in the car 24 and has an optical axis directed to the side wall surface 51. 36, a sensor control circuit 38 that detects the change in the amount of received light and the change in the incident angle of the received light, the hoisting machine 25 that drives the car 24 up and down, and a sensor. A control signal is exchanged between the car-side control device 26 that monitors the operation of the control circuit 38 and controls the operation in the car 24, and the hoisting machine 25 and the car-side control device 26. An operation control device 27 (operation control unit) that performs control, a main sheave 28 that is rotationally driven by the hoist 25, and a main rope 29 (robot) that suspends the car 24 wound around the main sheave 28. And flop), and a counterweight 30 which moves the lifting direction opposite the direction of the hanging is car 24 by the main rope 29.

  The car 24 includes a car frame 31, a car room 32 surrounded by the car frame 31, a side rescue door 33 that is an emergency rescue exit, and a reflecting plate 40 with a reflecting surface facing the side wall surface 51. The car-side control device 26 and the operation control device 27 can communicate with each other by a tail code outside the car frame 31. The car room 32 is provided with a display and a speaker, and the car-side control device 26 controls the display and the speaker.

  The photoelectric sensor 36 also has a projector 41 that projects a projection light beam horizontally across the adjacent hoistway 4a on the side wall surface 51, and a light receiver 46 that receives reflected light. The photoelectric sensor 36 transmits and receives an infrared light beam and is provided at the lower end of the car frame 31.

  The sensor control circuit 38 detects a change in the amount of reflected light from the side wall surface 51 and the amount of received light from the adjacent cage 5 and a change in the incident angle of the received light. The sensor control circuit 38 notifies the car-side control device 26 that the amount of received light and the incident angle have changed.

  The hoisting machine 25 includes a hoisting motor 34 to which the main sheave 10 is attached, and a pulse generator 35 attached to the motor shaft of the hoisting motor 34. The pulse generator 35 outputs a car position pulse signal having a pulse number and a pulse width modulated according to the rotation speed of the motor shaft to the operation control device 27.

  While the car position pulse signal of the car 24 can be acquired, the operation control device 27 determines that the car has a minor failure and executes an operation of moving the car 24 to the nearest floor or a specific designated floor (evacuation floor). If the operation control device 27 cannot receive the car position pulse signal, it determines that a serious failure has occurred, and assigns the car 24 as a rescued car. The operation control device 27 has substantially the same configuration as that of the operation control device 9, and the operation control device 27 performs substantially the same function as that of the operation control device 9 for functions other than these functions.

  FIG. 4 is a flowchart for explaining the control at the time of abnormality detection of the car position pulse signal by the elevator according to the present embodiment. In the following description, it is assumed that the elevator 1 is normal and an abnormality occurs on the elevator 2 side.

  While the elevator according to the present embodiment having the above-described configuration is in operation, the operation control devices 9 and 27 respectively set the operation mode of the elevator to the normal operation mode in Step A1. The operation of elevators 1 and 2 will start. The pulse generator 19 outputs a predetermined number of car position pulse signals such as several thousand for each rotation of the motor shaft. During normal operation, the operation control device 9 is notified of the car position pulse signal of the car 5 from the pulse generator 19. The operation control device 9 rotates the hoisting machine 7 according to the car call and the hall call. The operation control device 9 transmits a car position pulse signal of the car 5 to the operation control device 27, and receives a car position pulse signal of the car 24 from the operation control device 27. In step A <b> 1, the operation control device 27 is notified of the car position pulse signal of the car 24 from the pulse generator 35. The operation control device 27 rotationally drives the hoisting machine 7 according to the car call and the hall call. The operation control device 27 transmits the car position pulse signal of the car 24 to the operation control device 9, and receives the car position pulse signal of the car 5 from the operation control device 9. In step A1, the operation control devices 9 and 27 constantly monitor whether or not an abnormality has occurred.

  In step A2, the operation control device 9 determines whether or not an abnormality has occurred based on, for example, car position pulse information, car door failure, power failure, or power supply system abnormality.

  When the operation control device 9 detects an abnormality in the elevator car 2 in step A3, the Yes route is passed, and in step A4, the operation control device 9 determines whether or not the car position pulse signal of the car 24 of the adjacent car can be acquired. To do. When the car position pulse signal can be acquired, the operation control devices 9 and 27 determine that the car has a minor failure, and pass the Yes route, and start the operation of moving the car 24 to the nearest floor or a specific designated floor in Step A5. In this step A5, a maintenance person gets on the car 24 of the malfunctioning machine. The operation control device 27 causes the car 24 to travel. The maintenance staff works to rescue passengers.

  In step A4, when the operation control device 9 cannot acquire the car position pulse signal from the operation control device 27, it is determined that the failure is serious and the Yes route is passed. The operation control device 9 uses the photoelectric sensor 6 in step A6. Start the rescue operation that was. The operation control device 9 treats the car 24 as a rescued car and assigns the car 5 as a rescue car. The operation control device 9 sets the raising / lowering speed of the car 5 to a low speed.

  FIG. 5 is a flowchart for explaining the automatic rescue operation method by the elevator according to the present embodiment.

  In step B1, the operation control device 9 cancels all the car calls and hall calls when the automatic rescue operation is started. The operation control device 9 causes the car 5 to go straight to the evacuation floor. The evacuation floor is, for example, the entrance floor. The operation control device 9 reads the evacuation floor information held in advance from the storage unit 9c.

  In step B2, the operation control device 9 performs door closing on the evacuation floor. Upon receiving a command from the operation control device 9, the car-side control device 8 turns on the power to the photoelectric sensor 6. The photoelectric sensor 6 starts to transmit a projection light beam toward the side wall surface 17 of the hoistway space 3.

  The light beam from the hoistway 4 a is output to the adjacent hoistway 4 b, and the reflected beam reflected by the side wall surface 17 reaches the photoelectric sensor 6. The operation control device 9 starts the low-speed operation of the car 5. The car 5 starts to rise at a low speed, for example, a low speed equivalent to the traveling speed during the inspection operation, while transmitting the light beam and receiving the reflected light.

  In step B <b> 3, the operation control device 9 determines whether there is a change in the amount of received light and an incident angle of the received light via the sensor control circuit 37 and the car-side control device 8. While the car 5 is rising from the evacuation floor, while the change in the amount of received light and the change in the incident angle of the received light do not occur, the process of determining whether there is a change is continued through the No route.

  When the operation control device 9 detects the change in the light amount and the incident angle in step B3, it passes through the Yes route, and determines that the operation control device 9 has received the reflected light from the car 24, and the detected position in step B4. Stop the car 5 at

  FIG. 6 is a diagram for explaining an example of a method for detecting a change in light amount. The above described symbols represent the same elements. The projector 41 starts to rise while projecting light. The light receiving unit 46 collects the light reflected by the side wall surface 17. A light spot is formed on the second light receiving portion 49. As shown in FIGS. 2 and 6, a light spot is formed at a position F1 at the center in the height direction. The magnitudes of the output currents by the amounts of light received by the first light receiving unit 48 and the second light receiving unit 49 are equal. For example, the arithmetic circuit 50 performs an operation of subtracting the magnitude of the output current from the second light receiving unit 49 from the magnitude of the output current from the first light receiving unit 48. The sensor control circuit 37 determines that the reflected light is from the side wall surface 17 based on the difference value from the arithmetic circuit 50 and a threshold value stored in advance.

  Next, when the height of the car 5 becomes the same as the height of the car 24, the photoelectric sensor 6 receives the light reflected by the detection plate 40. The light spot moves on the first light receiving unit 48. As shown in FIG. 2, the light spot moves on the light receiver 46 from the position F1 to the position F2 by a distance ΔL. The arithmetic circuit 50 obtains the difference between the output current indicating the amount of light received by the first light receiver 48 and the output current indicating the amount of light received by the second light receiver 49 according to the distance ΔL. The arithmetic circuit 50 obtains the relationship between the position of the lens 44 and the amount of reflected light from the detection plate 40 at that position by an arithmetic expression using a triangulation method. The sensor control circuit 37 detects that the reflected light has been received from the detection plate 40 by referring to a triangulation method arithmetic expression and a memory table in which positions and values of received light are associated with each other. The sensor control circuit 37 notifies the car-side control device 8 of detection.

  Subsequently, in step B5 of FIG. 5, the operation control device 9 notifies the start of work, for example, by displaying the start of work on a display in the cab 15 or outputting the start of work from a speaker. The maintenance staff confirms the current stop position of the car 5 and then opens the side rescue door 16 of the car 5. A maintenance worker enters the hoistway space 3 and bridges the tread to the side rescue door 33 of the car 24, and a handrail or the like is hung between the cars 5 and 24 above the tread. Passengers in the car 24 move to the car 5 by the guidance of the maintenance staff. All passengers are rescued by a safe rescue operation.

  In step B6, the maintenance staff operates the car-side control device 8 to notify the operation control device 9 of the rescue completion. In step B6, the operation control device 9 causes the car 5 to go straight to the evacuation floor. The operation control device 9 opens on the evacuation floor. Passengers travel safely. Automatic rescue operation is completed.

  The above explanation is an example in which the car 5 is a rescue car and the car 24 of the elevator 2 in which an abnormality has occurred is a rescue car. When an abnormality occurs on the elevator car 1 side, the elevator according to the present embodiment operates by operating the operation control devices 9 and 27 interchangeably. The operation control device 27 drives the photoelectric sensor 36 of the car 24, and the photoelectric sensor 36 scans the projected light beam toward the other side wall surface 51 in the hoistway space 3, thereby causing the cars 5 and 24 to move. A rescue operation is performed to rescue the passengers in the car 5 as the rescued car and the rescue car, respectively.

  Even when the car position pulse signal from any of the pulse generators 19 and 35 cannot be used due to the occurrence of a power failure or failure during a disaster, the photoelectric sensors 6 and 36 according to the elevator according to the present embodiment. It is possible to accurately grasp the car position of the faulty car by scanning by the above, and it is possible to automatically rescue any passenger in the car 5 or 24 of the faulty car.

  Since the detection is performed using the change in the amount of received light and the change in the incident angle, even if the color of the detection object changes, the influence on the operation of the photoelectric sensor 6 is small. The photoelectric sensor 6 does not detect a background object that exists behind the preset distance. The photoelectric sensor 6 is not affected by the movement of other objects during the detection of the reflector 40. The photoelectric sensor 6 can continue a stable detection operation.

  If a projector and a light receiver are separately provided in the car 5 and the car 24, respectively, and the light receiver of the car 24 receives a projection light beam from the car 5 and detects the presence of the car 24, Due to the occurrence of an electric system failure, the car position of the car 24 may be unable to be acquired. Passengers trapped in the car 24 cannot be rescued by the automatic rescue operation. On the other hand, according to the elevator according to the present embodiment, the function of projecting and receiving light is provided in one car 5, so even if an electrical failure occurs, the rescue machine is a malfunctioning machine. The car height position can be acquired.

  Moreover, since the photoelectric sensors 6 and 36 perform detection using infrared rays, the reflected light level can be maintained without scattering the reflected light even if dust or dust in the hoistway space 3 is present. As a result, it is possible to execute an accurate rescue operation that is not easily affected by deterioration in detection accuracy with respect to scattering of infrared rays by dust or dust.

  Further, although the photoelectric sensors 6 and 36 are provided at the lower ends of the car frames 14 and 31, respectively, the photoelectric sensors 6 and 36 may be provided at the upper ends of the car frames 14 and 31, respectively. In this case, the operation control devices 9 and 27 lower the cars 5 and 24 from the upper floor. The operation control device 9 matches the floor surface of the car 5 and the floor surface of the car 24 by stopping the car 5 when the sensor control circuit 37 detects a change in the amount of incident light and the incident angle. The example of the control by the operation control device 27 is similar to this.

  Or you may attach the photoelectric sensors 6 and 36 to the outer wall surface side of the side plate which comprises the cabs 15 and 32, respectively. In this case, the operation control device 9 and the rolling control device 27 align the car height level according to the mounting height of the photoelectric sensors 6 and 36 relative to the car height and the height of the reflectors 39 and 40.

  Thus, the photoelectric sensor 6 of the car 5 and the photoelectric sensor 36 of the car 24 can increase the ratio between the light reception level of the reflected light from the side wall surface 17 and the light reception level of the reflected light from the reflection plate 40. Detection can be performed reliably.

  Thus, even if the car position pulse signal output from the elevator car 2 becomes abnormal, the operation control unit 9 of the elevator car 1 can accurately align the position of the car 5 used for rescue with the car 24.

(Modification)
In the above embodiment, since the car 5 is driven at a low speed during the inspection operation, the car 5 can be stopped in a short time after detecting a change in the amount of light. The elevator according to the embodiment of the present invention may execute the automatic rescue operation while moving the traveling speed of the car 5 at the normal speed. In the elevator according to the modification of the embodiment of the present invention, the photoelectric sensors 6 and 36 are installed at the upper ends of the car frames 14 and 29, respectively. The configuration other than this point is the same as that of the elevator shown in FIG.

  With such a configuration, the operation control device 9 starts an operation of automatic rescue operation. After causing the car 5 to go straight to the evacuation floor, the operation control device 9 drives the photoelectric sensor 6 to the car 5 side. The photoelectric sensor 6 transmits a light beam toward the side wall surface 17 of the hoistway space 3 and receives reflected light. In this state, the operation control device 9 performs an operation of detecting the lower end portion of the car 24 by raising the car 5 at a normal speed faster than the speed during the inspection operation. Since the car 5 cannot be stopped immediately after the amount of incident light and the incident angle are changed in step B3 of the flowchart of FIG. 4, the operation control device 9 does not stop the floor of the car 5 of the photoelectric sensor 6. Control is performed so that the car 5 is stopped at the timing when the distance between the position relative to the surface and the floor surface is finished to rise. For example, the car 5 travels about 2 meters.

  From the position of the car 5 at the moment when the photoelectric sensor 6 detects a change in the amount of light, the car 5 rises about 2 meters, and then the car 5 stops. Since the car 5 is stopped with a margin of about 2 meters, the operation control device 9 can drive the car 5 at a normal speed. The time required for detecting the car position of the car 24 can be shortened.

  Further, the operations of the operation control devices 9 and 27 may be interchanged to operate.

  In other words, in this modification, the operation control device 9 can perform control by the same operation as when the elevators 1 and 2 perform landing control on each floor using the landing plates.

  The photoelectric sensors 6 and 36 are provided at the upper ends of the car frames 14 and 31, respectively. However, the photoelectric sensors 6 and 36 may be provided at the lower ends of the car frames 14 and 31, respectively. In this case, the operation control devices 9 and 27 lower the cars 5 and 24 from the upper floor. Control which stops the cage | basket | car 5 at the timing which finishes falling the position between the position with respect to the floor surface of the cage | basket | car 5 of the photoelectric sensor 6 and this floor surface is performed.

  Alternatively, the photoelectric sensors 6 and 36 may be attached to the outer wall surface side of each car side plate, and the car height level may be aligned according to the mounting height of the photoelectric sensors 6 and 36 with respect to the car height. You may provide a reflecting plate in a wall surface.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In the above embodiment, the car position pulse signal is directly transmitted and received between the elevators 1 and 2, but the car position pulse signal is transmitted via the group management control device which is a host device of the elevators 1 and 2. May be transmitted and received between the operation control devices 9 and 27.

  The number of elevators may be three or more. Three or more operation control devices mutually notify each other's own car position pulse signal, and when any car position pulse signal from any elevator becomes abnormal, the operation control device or group management control of another elevator The device assigns a rescue machine. Subsequent operation of the elevator is the same as in the above embodiment.

  The light projector 41 of the photoelectric sensor 6 may use a laser light source having a wavelength in the visible light band, and the light receiver 46 uses a light receiving element corresponding to the light emission band. The photoelectric sensor 6 may include a lens for collecting light, a mirror, and the like.

  Instead of the photoelectric sensor 6, an ultrasonic sensor that transmits and receives ultrasonic waves may be used. This ultrasonic sensor detects an intensity change of the sound pressure level of a sound wave by an opposing car 5 using a time difference from the transmission to reception of an ultrasonic oscillator, a reflected wave receiver, and an ultrasonic wave. And a beam focusing lens.

  Although the cars 5 and 24 are provided with the side rescue doors 16 and 33 on the side of the car, respectively, the cars 5 and 24 may be provided with a rescue outlet on the rear side of the car room or on the ceiling side of the car room.

  In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1, 2 ... Elevator No. 3, 3 Hoistway space, 4a, 4b ... Hoistway, 5, 24 ... Car, 6, 36 ... Photoelectric sensor (reflective sensor), 7, 25 ... Hoisting machine, 8, DESCRIPTION OF SYMBOLS 26 ... Car side control apparatus (car side control part), 9, 27 ... Operation control apparatus (operation control part), 9a ... Operation control part, 9b ... Memory | storage part, 9c ... Car position detection part, 9d ... Transmission / reception part, 10 28, main sheave, 11, 29 ... main rope, 12, 30 ... counterweight, 13 ... car sheave, 14, 31 ... car frame, 15, 32 ... car room, 16, 33 ... side rescue door (rescue exit), 17, 51 ... Side wall surface, 18, 34 ... Hoisting motor, 19, 35 ... Pulse generator, 20 ... Counterweight sheave, 21 ... Rope hitch, 22 ... Landing call registration device, 23 ... Signal cable, 37, 38 ... Sensor control circuit, 39, 4 Reflector, 41 ... Projector, 43 ... Target, 44, 45 ... Lens, 46 ... Light receiver, 47 ... Substrate, 48 ... First light receiving part (photodiode), 49 ... Second light receiving part (photodiode), 50 ... arithmetic circuit.

Claims (4)

Raising and lowering a plurality of hoistways provided in the same hoistway space, and a plurality of cars each having a rescue exit,
A light reflector provided on the outside of each car for each of these cars;
Light that is provided for each of the plurality of cars, projects a light beam having an optical axis directed to a side wall surface in the hoistway space across the adjacent hoistway, and is reflected by the side wall surface and the reflecting plate A reflective sensor that receives light,
A sensor control circuit provided for each car that drives these sensors on and off and detects a change in the amount of received light by each sensor and a change in the incident angle of the received light;
A hoisting machine provided for each of the plurality of hoistways for driving each car up and down and outputting a car position signal of each car;
A control signal is exchanged between the hoisting machine and the sensor control circuit to control the operation of each elevator, each car that outputs an abnormality in the car position signal is treated as a rescued car, A plurality of operation control units having a function of performing a rescue operation using a normal car as a rescue car,
Among these operation control units, the operation control unit of the rescue car causes the rescue car to travel while outputting a projection light beam from the sensor of the rescue car, and the sensor control circuit controls the light amount and the incident angle. An elevator characterized in that the rescue car is stopped at a position where a change is detected.   The elevator according to claim 1, wherein the sensor projects and receives infrared rays.   The elevator according to claim 1, wherein the sensor is provided at an upper end portion or a lower end portion of the car frame. The sensor includes: a light projector; and a light receiver including a plurality of photodiodes arranged in a direction in which a light spot of the received light moves.
The elevator according to claim 1, wherein the sensor control circuit detects the presence of the rescued car based on the magnitude of the output current from the photodiodes.

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