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JP-7855075-B2 - elevator

JP7855075B2JP 7855075 B2JP7855075 B2JP 7855075B2JP-7855075-B2

Inventors

  • 長徳 典宏
  • 山▲崎▼ 智史

Assignees

  • 三菱電機ビルソリューションズ株式会社

Dates

Publication Date
20260507
Application Date
20220914

Claims (9)

  1. A basket and A lifting mechanism for raising and lowering the aforementioned cage, A photographing device attached to the basket, capable of photographing at least one of an upper region located above the basket and a lower region located below the basket, A lighting device attached to the basket, which irradiates light onto at least a portion of the upper region and the lower region, Earthquake detectors capable of detecting earthquakes, The system comprises a lifting mechanism, a photographing device, and a control unit for controlling the lighting device, When the earthquake sensor detects an earthquake, the cage stops, and after the cage stops, the camera takes a photograph of at least a portion of at least one long object. The control unit, Based on the images of at least a portion of the images captured by the aforementioned imaging device, the presence or absence of snagging of at least one long object is determined. With respect to the at least one elongated object, a two-dimensional waveform is generated based on the image, which is defined by time and the amount of unidirectional vibration at a reference point of the elongated object. With respect to the at least one long object, the snagging of the long object is determined based on the two-dimensional waveform, Based on the multiple attenuation peaks that can be observed in the two-dimensional waveform, the snagging of at least one long object is determined. The aforementioned attenuation peak is the point of maximum oscillation in the two-dimensional waveform, and is the point of maximum oscillation where there is no point of maximum oscillation exceeding the attenuation peak at a time after the time the attenuation peak occurred.
  2. The elevator according to claim 1 , wherein the reference point includes the point in the at least one elongated object that is closest to the center of the image.
  3. The elevator according to claim 1 , wherein the reference point includes the location of the long object that shows the greatest fluctuation in the image.
  4. The elevator according to claim 1 , wherein the reference location is a location marked on the long object.
  5. A basket and A lifting mechanism for raising and lowering the aforementioned cage, A photographing device attached to the basket, capable of photographing at least one of an upper region located above the basket and a lower region located below the basket, A lighting device attached to the basket, which irradiates light onto at least a portion of the upper region and the lower region, Earthquake detectors capable of detecting earthquakes, The system comprises a lifting mechanism, a photographing device, and a control unit for controlling the lighting device, When the earthquake sensor detects an earthquake, the cage stops, and after the cage stops, the camera takes a photograph of at least a portion of at least one long object. The control unit, Based on the images of at least a portion of the images captured by the aforementioned imaging device, the presence or absence of snagging of at least one long object is determined. With respect to the at least one elongated object, a two-dimensional waveform is generated based on the image, which is defined by time and the amount of unidirectional vibration at a reference point of the elongated object. With respect to the at least one long object, the snagging of the long object is determined based on the two-dimensional waveform, It further includes a memory unit that pre-stores multiple reference two-dimensional waveforms, The control unit determines whether the long object is caught on the elevator based on one of the plurality of reference two-dimensional waveforms and the two-dimensional waveform, with respect to the at least one long object.
  6. A basket and A lifting mechanism for raising and lowering the aforementioned cage, A photographing device attached to the basket, capable of photographing at least one of an upper region located above the basket and a lower region located below the basket, A lighting device attached to the basket, which irradiates light onto at least a portion of the upper region and the lower region, Earthquake detectors capable of detecting earthquakes, The system comprises a lifting mechanism, a photographing device, and a control unit for controlling the lighting device, When the earthquake sensor detects an earthquake, the cage stops, and after the cage stops, the camera takes a photograph of at least a portion of at least one long object. The control unit, Based on the images of at least a portion of the images captured by the aforementioned imaging device, the presence or absence of snagging of at least one long object is determined. With respect to the at least one elongated object, a two-dimensional waveform is generated based on the image, which is defined by time and the amount of unidirectional vibration at a reference point of the elongated object. With respect to the at least one long object, the snagging of the long object is determined based on the two-dimensional waveform, The imaging device photographs a plurality of different elongated objects, the control unit generates a two-dimensional waveform for each elongated object, and based on the plurality of different two-dimensional waveforms generated for each of the plurality of elongated objects, it determines whether one or more of the elongated objects are caught . The control unit determines whether one or more long objects are caught in the elevator based on the difference in behavior of one or more of the two-dimensional waveforms derived by comparing the plurality of two-dimensional waveforms with respect to the other two-dimensional waveforms .
  7. A basket and A lifting mechanism for raising and lowering the aforementioned cage, A photographing device attached to the basket, capable of photographing at least one of an upper region located above the basket and a lower region located below the basket, A lighting device attached to the basket, which irradiates light onto at least a portion of the upper region and the lower region, Earthquake detectors capable of detecting earthquakes, The system comprises a lifting mechanism, a photographing device, and a control unit for controlling the lighting device, When the earthquake sensor detects an earthquake, the cage stops, and after the cage stops, the camera takes a photograph of at least a portion of at least one long object. The control unit, Based on the images of at least a portion of the images captured by the aforementioned imaging device, the presence or absence of snagging of at least one long object is determined. With respect to the at least one elongated object, a two-dimensional waveform is generated based on the image, which is defined by time and the amount of unidirectional vibration at a reference point of the elongated object. With respect to the at least one long object, the snagging of the long object is determined based on the two-dimensional waveform, An elevator that determines that there is no obstruction of the long object if the local attenuation rate, which can serve as a measure of attenuation in the portion of the two-dimensional waveform that is 10% or less, is below a first threshold, while determining that there is obstruction of the long object if the local attenuation rate is greater than the first threshold.
  8. A basket and A lifting mechanism for raising and lowering the aforementioned cage, A photographing device attached to the basket, capable of photographing at least one of an upper region located above the basket and a lower region located below the basket, A lighting device attached to the basket, which irradiates light onto at least a portion of the upper region and the lower region, Earthquake detectors capable of detecting earthquakes, The system comprises a lifting mechanism, a photographing device, and a control unit for controlling the lighting device, When the earthquake sensor detects an earthquake, the cage stops, and after the cage stops, the camera takes a photograph of at least a portion of at least one long object. The control unit, Based on the images of at least a portion of the images captured by the aforementioned imaging device, the presence or absence of snagging of at least one long object is determined. With respect to the at least one elongated object, a two-dimensional waveform is generated based on the image, which is defined by time and the amount of unidirectional vibration at a reference point of the elongated object. With respect to the at least one long object, the snagging of the long object is determined based on the two-dimensional waveform, An elevator in which, in the first movement of the elevator car after the earthquake has ended, the maximum speed of the car in the first case is greater than the maximum speed of the car in the second case, and the maximum speed of the car in the second case is greater than the maximum speed of the car in the third case.
  9. A basket and A lifting mechanism for raising and lowering the aforementioned cage, A photographing device attached to the basket, capable of photographing at least one of an upper region located above the basket and a lower region located below the basket, A lighting device attached to the basket, which irradiates light onto at least a portion of the upper region and the lower region, Earthquake detectors capable of detecting earthquakes, The system comprises a lifting mechanism, a photographing device, and a control unit for controlling the lighting device, When the earthquake sensor detects an earthquake, the cage stops, and after the cage stops, the camera takes a photograph of at least a portion of at least one long object. The control unit determines whether at least one long object is caught based on at least a portion of the images captured by the imaging device. The aforementioned photographing device photographs at least a portion of the at least one long object after its movement has stopped. The control unit determines whether the long object is stuck based on an image of at least a portion of the long object whose movement has stopped, with respect to the at least one long object . The system further includes a storage unit that stores images taken by the camera of at least one long object, at least a portion of it, while the elevator is stopped at the landing level and no snagging has occurred. The control unit determines whether or not at least one of the long objects is stuck by comparing the image captured by the imaging device with the stored image of at least one of the long objects that has stopped moving after the elevator car has stopped at the landing floor .

Description

This disclosure relates to elevators. Conventionally, the technology described in Patent Document 1 is known as a way to deal with earthquakes in elevators. In this technology, during automatic diagnostic and recovery operation after an earthquake, the elevator car is operated at a lower speed than normal, and the entanglement of long objects is detected from the change in the torque of the hoisting machine. Japanese Patent Publication No. 2018-184241 This is a schematic diagram of an elevator according to one embodiment of the present disclosure.This is a block diagram of the related parts involved in the detection and control of whether long objects get caught.This flowchart shows an example of a procedure for detecting whether a long object is getting stuck, as performed by the control device.This flowchart shows an example of a procedure for detecting whether a long object is getting stuck, as performed by the control device.This figure shows an example of a two-dimensional waveform in a wire rope that is free from snagging.This figure shows an example of a two-dimensional waveform in a wire rope that is snagged. The embodiments relating to this disclosure will be described in detail below with reference to the attached drawings. Note that if multiple embodiments or modifications are included below, it is intended from the outset that new embodiments may be constructed by appropriately combining their characteristic features. Furthermore, in the following embodiments, the same components are denoted by the same reference numerals in the drawings, and redundant explanations are omitted. Also, in the following description, the wire rope 14, control cable, and compensating rope are long objects. Furthermore, as will be described in detail below, the reference point of a long object when no earthquake is occurring will have a deflection of 0 (zero). Also, in the following description, the portion of the two-dimensional waveform that is 10% or less refers to the time portion of the overall waveform of the two-dimensional waveform, which is a function of the deflection amount with respect to time. The overall waveform is the waveform from the start of imaging until the earthquake subsides. Furthermore, among the components described below, components not described in the independent claim indicating the highest-level concept are optional components and not essential components. Figure 1 is a schematic diagram of an elevator 10 according to one embodiment of the present disclosure. As shown in Figure 1, the elevator 10 comprises a car 11, a hoisting machine 12, a counterweight 13, a wire rope 14, a car call button 15, a destination floor selection button 16, a landing detection sensor 17, an encoder 25, a car lifting mechanism 28, and a control device 18. The control device 18 is composed of, for example, a control panel, and in this embodiment, the control device 18 and the hoisting machine 12 are provided in a machine room 30 located above the hoistway 19. If the elevator does not have a machine room, the control panel and the hoisting machine may be provided in a pit located below the hoistway. The wire rope 14 is wound around the hoisting machine 12, one end of which is fixed to, for example, the upper part of the car 11, and the other end is fixed to the counterweight 13 via a deflection wheel (not shown). The elevator car call button 15 is located at the landing 22 to call the elevator car 11 and to specify the direction of movement for the elevator car 11. The destination floor selection button 16 is located inside the elevator car 11 to specify the destination floor for the elevator car 11. The landing detection sensor 17 is installed in the hoistway 19 and detects when the elevator car 11 has landed on the landing 22. The landing detection sensor 17 consists of, for example, vanes 17a made of steel plates or the like, installed in the hoistway at positions corresponding to the landing positions on each floor, and a magnetic detector 17b that detects the vanes 17a. When the control device 18 receives a signal from the landing detection sensor 17 indicating that the elevator car 11 has landed on the landing 22 of any floor, it controls the elevator car door opening/closing motor 39, causing the elevator car door 32 to open and the landing door 31 to open in conjunction with the elevator car door 32, allowing people to get on and off the elevator car 11. The encoder 25 is, for example, an absolute type encoder, and detects the position of the basket 11 and the direction of movement of the basket 11 by detecting the rotational distance and rotational direction from the origin of the hoisting motor 12a of the hoisting machine 12. The encoder 25 may be composed of any of the following types: mechanical (contact type), optical type, magnetic type, or electromagnetic induction type. The elevator 10 is further equipped with a lighting device 40, a camera 43, and an earthquake sensor 47. The lighting device 40