Determination device and determination method

Abstract

To realize a remote monitoring with a high quality capable of preventing the occurrence of variation in quality of the work to deal with troubles, etc. occurred in an elevator due to differences in worker experiences and abilities, with a simple configuration.SOLUTION: A remote monitoring support device 120 determines properly the operation state of a car 131 with a simple configuration by determining the operation state of the car 131 based on the signal output from a rotary encoder 121 to detect the hoist 132a rotation of an elevator 130, and can quickly dispatch the most suitable worker to the site to deal with the detected troubles, etc. by transmitting the notification information related to the determination result to a management server computer 110. This can prevent the occurrence of variation in the responding work quality to the troubles, etc. occurred in the elevator 130 due to differences in worker experiences and abilities with a simple configuration and a high-quality remote monitoring can be realized.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a remote monitoring support device that supports remote monitoring of an elevator. [Background technology]

[0002] Conventionally, elevators installed in multi-story buildings have been inspected by workers periodically, or when a malfunction occurs, to ensure proper operation of the elevator by performing inspection work (diagnostic maintenance work) that involves diagnosis for maintenance purposes.

[0003] In addition, there has traditionally been a remote elevator monitoring system that monitors the status of an elevator at a remote location by providing a communication function to the control board (control device) that controls the elevator's operation and communicating between the control board and a management server computer installed at a remote location from the elevator.

[0004] In addition, there has been a technology in the past that connects a terminal device with communication capabilities to the elevator's control board, etc., and monitors the elevator's status from a remote location via the terminal device. This makes it possible to remotely monitor, for example, older elevators that were not designed for remote monitoring at the time of installation.

[0005] Specifically, related technologies include a technology for an elevator operation monitoring system that includes at least three types of acceleration sensors: a vertical acceleration sensor, a horizontal acceleration sensor, and an acceleration sensor in the direction of the landing, and that enables elevator abnormalities to be detected by multiple monitoring units based on information obtained from these three types of acceleration sensors (see, for example, Patent Document 1 below). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2019-189416 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-203620 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-180205 [Patent Document 4] Patent Publication No. 2021-070560 [Patent Document 5] International Publication No. 2020 / 217352 Summary of the Invention [Problem to be solved by the invention]

[0007] However, all of the above-mentioned conventional technologies have the problem that their configurations tend to be complicated because they detect signs of trouble such as elevator breakdowns and the occurrence of the trouble itself (hereinafter referred to as "trouble, etc." as appropriate) based on information obtained from multiple components that make up the elevator. Also, the above-mentioned conventional technologies have the problem that when an elevator trouble, etc. is detected by remote monitoring, the quality of the work to respond to the trouble, etc. varies due to differences in the experience and ability of the workers who are sent to the site.

[0008] In particular, there was a problem in that the quality of work performed to check the operation of the hoist that raises and lowers the elevator car and to respond to malfunctions varied due to differences in the experience and ability of workers, which compromised the safety of elevator users and threatened their sense of security.

[0009] In addition, generally, components installed by the elevator manufacturer itself or an elevator management company affiliated with the manufacturer (hereinafter referred to as "manufacturers, etc.") are controlled by the elevator's control board, and so-called "independent elevator maintenance service companies" that are independent of manufacturers, etc., install components that are installed when the elevator is installed. It is difficult to obtain elevator information on the same level as manufacturers using this service.

[0010] Due to these circumstances, elevator managers and others have tended to be forced to carry out maintenance management within the scope specified by the elevator manufacturer, etc., which has tended to limit the degree of freedom for elevator managers and others to carry out maintenance management. In such a situation, if the frequency of maintenance inspections is reduced in order to reduce maintenance management costs, there is a problem that the safety of elevator users may be compromised.

[0011] In order to solve the problems associated with the conventional technology described above, the present invention aims to provide a remote monitoring support device that can achieve high-quality remote monitoring by using a simple configuration to prevent variations in the quality of response work to problems related to elevator hoists due to differences in the experience and ability of workers.

[0012] Furthermore, in order to solve the problems of the conventional technology described above, the present invention aims to provide a remote monitoring support device that uses a simple configuration to prevent variations in the quality of response work to problems related to elevator hoists due to differences in the experience and ability of workers, and that can achieve both increased flexibility in maintenance management and improved safety for elevator users. [Means for solving the problem]

[0013] In order to solve the above-mentioned problems and achieve the object, the remote monitoring support device of the present invention is characterized by comprising: an acquisition means for acquiring a signal output from an encoder that detects the rotation of a hoist that raises and lowers an elevator car; a determination means for determining the operating state of the hoist based on the signal acquired by the acquisition means; and a transmission means for transmitting notification information regarding the determination result of the determination means to a management server computer installed in a remote location of the elevator.

[0014] In addition, the remote monitoring support device of the present invention is characterized in that, in the above invention, the determination means determines whether the hoisting machine is stopped or operating based on the signal acquired by the acquisition means.

[0015] In addition, the remote monitoring support device of the present invention is characterized in that, in the above invention, the determination means determines at least one of the rotation direction and rotation speed of the hoisting machine based on the signal acquired by the acquisition means.

[0016] In addition, the remote monitoring support device of the present invention is characterized in that, in the above invention, the judgment means judges whether or not there is unevenness in the rotation of the hoisting machine based on the signal acquired by the acquisition means.

[0017] In addition, the remote monitoring support device of this invention is characterized in that, in the above invention, the acquisition means further acquires a signal output from a sensor used to detect the position of the cage, and the judgment means judges the position of the cage based on the signal acquired by the acquisition means.

[0018] In addition, the remote monitoring support device of this invention is characterized in that, in the above invention, the judgment means judges whether or not there is an abnormality in the correlation between the position of the car and at least one of the rotation direction and rotation speed of the hoist, based on the signal acquired by the acquisition means.

[0019] Further, in the above-mentioned remote monitoring support device according to the present invention, the determination means The system is characterized in that it determines whether the operating state of the hoist is in a normal operating state, and if the determination means determines that the operating state is not in a normal operating state, the transmission means transmits the notification information, which includes information regarding the elevator state, to the management server computer.

[0020] In addition, the remote monitoring support device according to the present invention is characterized in that, in the above invention, the encoder is not connected to a control board of the elevator. [Effects of the Invention]

[0021] The remote monitoring support device of the present invention has the advantage of being able to prevent variations in the quality of response work to problems related to elevator hoists due to differences in the experience and ability of workers through a simple configuration, thereby achieving high-quality remote monitoring.

[0022] Furthermore, the remote monitoring support device of the present invention has a simple configuration that prevents variations in the quality of response work to problems related to elevator hoists due to differences in the experience and ability of workers, and has the effect of achieving both increased flexibility in maintenance management and improved safety for elevator users. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is an explanatory diagram illustrating a system configuration of a remote monitoring system. [Figure 2] FIG. 2 is an explanatory diagram showing the hardware configuration of each part constituting the remote monitoring system. [Figure 3] FIG. 2 is a block diagram showing the functional configuration of the remote monitoring support device. [Figure 4] 10 is a flowchart showing a processing procedure of the remote monitoring support device. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a remote monitoring system including a remote monitoring support device according to the present invention will be described in detail below with reference to the accompanying drawings.

[0025] (System configuration of remote monitoring system) First, the system configuration of a remote monitoring system including a remote monitoring support device according to an embodiment of the present invention will be described. Fig. 1 is an explanatory diagram showing the system configuration of a remote monitoring system. As shown in Fig. 1, a remote monitoring system 100 includes a management server computer 110 and a remote monitoring support device 120.

[0026] The management server computer 110 is installed, for example, in a location different from the location where the elevator 130 to be monitored is installed, and is remote from the location where the elevator 130 is installed. Specifically, the management server computer 110 can be installed, for example, in a maintenance management company 140 that is responsible for maintaining and managing the elevator 130.

[0027] In addition to the management server computer 110, the maintenance management company 140 is also equipped with a telephone 142 that enables direct communication between an occupant in the elevator car of the elevator 130 and an operator 141 of the maintenance management company 140. The telephone 142 may be directly connected to the public voice network 101, or may be connected to the public voice network 101 via a PBX (Private Branch eXchange) not shown.

[0028] The management server computer 110 can be realized by, for example, a general-purpose server computer device. The management server computer 110 may be connected to an operation terminal device 143 realized by a personal computer or the like. The management server computer 110 and the operation terminal device 143 may be installed in the same place. They may be located in different places.

[0029] The elevator 130 to be monitored by the remote monitoring system 100 is installed in a multi-story building or the like, and has a car (cabin) 131 for carrying people and goods. The car 131 is installed in a hoistway (not shown) that runs vertically through each floor of the building. One car 131 is installed in each hoistway.

[0030] The basket 131 is provided with a sensor 131a (see FIG. 2; hereinafter referred to as "basket position detection sensor 131a") that detects the position of the basket. The basket position detection sensor 131a is provided, for example, on the outside of the basket 131, on the ceiling or wall of the basket 131. The basket position detection sensor 131a includes a light-emitting element and a light-receiving element provided in a position opposite the light-emitting element. The basket position detection sensor 131a outputs a signal according to the light-receiving state of the light-receiving element.

[0031] The elevator shaft is provided with plates (not shown) that shield light from the light-emitting element and light-receiving element of the car position detection sensor 131a according to the position of the car 131. A plurality of plates are provided in the length direction of the elevator shaft, i.e., in the vertical direction. Each plate shields light from the light-emitting element and light-receiving element of the car position detection sensor 131a when, as the car 131 moves, the car position detection sensor 131a is positioned at the same height as the plate in the vertical direction.

[0032] The plate is provided at a position that blocks light between the light-emitting element and the light-receiving element in the car position detection sensor 131a when the car 131 is located at a landing position on each floor. Also, the plate is provided at a position that blocks light between the light-emitting element and the light-receiving element in the car position detection sensor 131a when the car 131 passes a position that is a predetermined distance away from the position where the car 131 stops on each floor.

[0033] The elevator 130 may be provided with, for example, a limit switch, a magnetic sensor, an optical sensor, an acceleration sensor, etc., instead of or in addition to the car position detection sensor 131a. Also, instead of or in addition to the car position detection sensor 131a, the elevator 130 may be provided with, for example, a LiDAR (Light Detection and Ranging) that measures distance by the reverberation of laser light.

[0034] Specifically, for example, a TOF (Time-of-Flight) LiDAR that emits pulse waves or an FMCW (Frequency Modulated Continuous Wave) LiDAR that emits FM (Frequency Modulated) waves can be used. By using a TOF LiDAR, the position of the cage 131 can be detected by a simple system.

[0035] The car position detection sensor 131a and the plate, or any other sensors used to detect the position of the car 131 in place of these, are not limited to so-called pre-installed sensors that are installed when the elevator 130 is installed, but may also be sensors that are added after the elevator 130 is installed.

[0036] The elevator shaft is also provided with a drive mechanism 132 involved in the raising and lowering of the car 131. The drive mechanism 132 can be provided, for example, at the top of the elevator shaft, and is composed of a hoist 132a, a rope 132b, a counterweight 132c, etc. The drive mechanism 132 is also equipped with an electromagnetic brake and a speed governor (both of which are not shown).

[0037] The hoist 132a generates power to raise and lower the car 131. The hoist 132a is equipped with a motor and an output shaft that are provided inside a bracket. A rotary encoder 121 is attached to the output shaft of the hoist 132a. The rotary encoder 121 can measure the number of rotations, rotation angle, and rotation position of the output shaft of the hoist 132a.

[0038] The measurement method by the rotary encoder 121 may be, for example, an incremental method that integrates pulses generated corresponding to the rotation angle from the measurement start point, or an absolute method that measures the absolute angular position of one rotation or multiple rotations relative to the origin. Also, the rotary encoder 121 may be a magnetic encoder that detects rotational position information as changes in a magnetic field, converts it into an electrical signal, and outputs it.

[0039] The rotary encoder 121 is not provided in the elevator 130 in advance when the elevator 130 is installed, but is attached after the elevator 130 is installed. The rotary encoder 121 may be attached to the output shaft of the hoisting machine 132a in advance when the elevator 130 is installed.

[0040] The car 131 is equipped with a door 131b. An operation panel 133 is provided inside the car 131. The operation panel 133 is equipped with a group of operation buttons including various operation buttons, a display that shows the floor on which the car 131 is located, etc. The operation panel 133 is also equipped with a microphone and a speaker, and functions as an intercom. The operation panel 133 is equipped with a control board for the operation panel 133.

[0041] Doors 134a are provided at positions (landings) 134 in the elevator shaft that correspond to each floor. Doors 134a provided at landings 134 are locked by a device called an interlock or the like. When elevator 130 arrives at a stopping floor and a motor (not shown) provided in car 131 is driven, the drive mechanism of door 131b of car 131 engages with the interlock, releasing the lock provided by the interlock, and door 131b and door 134a open and close in unison.

[0042] An operation panel 135 is installed at each of the landings 134. Each of the operation panels 135 includes a landing call button, a display that displays the floor where the car 131 is located, and the like (all of which are omitted from the illustration). Each of the operation panels 135 installed at each of the landings 134 includes a control board for the operation panel 135.

[0043] The elevator 130 is equipped with a control board 136 that drives and controls each part of the elevator 130. The control board 136, for example, drives and controls the hoisting machine 132a to raise and lower the car 131. The control board 136 is also connected to, for example, a control board for the operation panel 133 and a control board for the operation panel 135, and transmits and receives signals to and from the control board for the operation panel 133 and the control board for the operation panel 135.

[0044] The remote monitoring support device 120 is connected to the management server computer 110 via a network 102 such as the Internet. Therefore, the remote monitoring support device 120 can communicate with the management server computer 110. The remote monitoring support device 120 also has a communication function and is connected to the rotary encoder 121 wirelessly or via a wire. The remote monitoring support device 120 acquires a signal output from the rotary encoder 121 and determines the operating state of the hoisting machine 132a based on the acquired signal.

[0045] Specifically, the remote monitoring support device 120 receives the signal from the rotary encoder 121. Based on the signal, for example, it is determined whether the hoist 132a is stopped or running. Specifically, the remote monitoring support device 120 may determine, for example, the moving speed of the car 131 based on the signal output from the rotary encoder 121.

[0046] Specifically, the remote monitoring support device 120 may determine, for example, whether or not there is unevenness in the rotation of the hoisting machine 132a, based on the signal output from the rotary encoder 121. Furthermore, the remote monitoring support device 120 may determine the position of the car 131 based on the signal output from the rotary encoder 121 and the signal output from the car position detection sensor 131a.

[0047] Then, the remote monitoring support device 120 transmits information relating to the determination result to the management server computer 110. In this way, by transmitting notification information relating to the determination result about the operating state of the hoisting machine 132a based on the signal output from the rotary encoder 121 to the management server computer 110, the operating state of the hoisting machine 132a can be remotely monitored at the maintenance management company 140 located remotely from the elevator 130.

[0048] Furthermore, the remote monitoring support device 120 may be connected to the control board 136 wirelessly or by wire. In this case, the remote monitoring support device 120 communicates between the control board 136 and the management server computer 110, and can output to the control board 136 operation instructions output from the management server computer 110 according to the state of the elevator 130. This allows the elevator 130 to be remotely controlled by a maintenance management company 140 located in a remote location from the elevator 130.

[0049] The remote monitoring support device 120 is further connected to a telephone 142 via a public voice network 101. The public voice network 101 includes a fixed telephone network (public switched telephone network) and a mobile phone network. This allows a person inside the car 131 of the elevator 130 to communicate directly with an operator 141 of the maintenance management company 140. The remote monitoring support device 120 and the telephone 142 may be connected via the network 102 instead of the public voice network 101.

[0050] (Hardware configuration of each part constituting the remote monitoring system 100) Next, we will explain the hardware configuration of the remote monitoring system 100. Figure 2 is an explanatory diagram showing the hardware configuration of each part that makes up the remote monitoring system 100. As shown in Figure 2, the control board 136 is connected via signal lines to each component that makes up the elevator 130, such as the hoisting machine 132a, the operation panel 133 (control board for the operation panel 133), the operation panel 135 (control board for the operation panel 135), and various sensors (not shown) including the car position detection sensor 131a, and drives and controls each of these components.

[0051] The control board 136 controls the operation of the elevator 130 by acquiring signals (up signals) output from each component of the elevator 130 and outputting control signals (down signals) to each component based on the up signals. Specifically, the control board 136 outputs control signals to the hoisting machine 132a, for example, to control the direction and speed of rotation.

[0052] In addition, the control board 136 can determine whether the car 131 is stopped correctly at the desired floor (without any step with the landing surface) based on the control signal for controlling the direction and speed of rotation output to the hoisting machine 132a and the output from the car position detection sensor 131a.

[0053] The control board 136 controls the rotation direction and rotation speed output to the hoisting machine 132a. Based on the control signal for detecting the car position and the output from the car position detection sensor 131a, it is possible to determine whether the car 131 has passed a position that is a predetermined distance away from the position where the car 131 stops on each floor.

[0054] The control board for the operation panel 133 described above generates an up signal corresponding to the input operation each time it receives an input operation on an operation button by a user of the elevator 130 or the like, and outputs the generated up signal to the control board 136. For example, when the control board 136 acquires an up signal indicating that the emergency button on the operation panel 133 has been operated, it outputs an alert signal to the remote monitoring support device 120 to alert that the emergency button has been operated.

[0055] Furthermore, when control board 136 detects abnormal operation of elevator 130 based on an up signal or the like, it outputs an alert signal to remote monitoring support device 120 to notify that abnormal operation has been detected. When control board 136 detects, for example, an earthquake, an abnormal stop of car 131, insufficient lighting inside car 131, or abnormal sound inside car 131, it outputs an alert signal to remote monitoring support device 120.

[0056] Specifically, for example, when the control board 136 detects an earthquake of a predetermined seismic intensity (for example, seismic intensity 4) or higher, it outputs a signal for issuing an alert to the remote monitoring support device 120. Furthermore, specifically, for example, when the control board 136 detects an abnormal stop of the car 131 at a position where the doors of the car 131 and the landing 134 cannot be opened or closed, such as between floors, it outputs a signal for issuing an alert to the remote monitoring support device 120.

[0057] Specifically, the control board 136 may detect insufficient illuminance inside the car 131 using an illuminance sensor (not shown) such as a phototransistor or photodiode attached inside the car 131, and when it detects insufficient illuminance inside the car 131, it may output an alert signal to the remote monitoring support device 120. Specifically, the control board 136 may use a microphone provided on the operation panel 133 to output an alert signal to the remote monitoring support device 120 when it detects an abnormal sound with a strength (volume) that exceeds the range of normal conversation, such as a scream or yell.

[0058] Specifically, for example, when the control board 136 detects that the corresponding door 131b, 134a does not operate based on the output value of the door opening / closing sensor despite having output a control signal for opening and closing the door 131b, 134a, the control board 136 outputs a signal for issuing an alert to the remote monitoring support device 120. Specifically, for example, when the control board 136 detects abnormal operation (malfunction) in which a passenger is trapped inside the car 131, the control board 136 outputs a signal for issuing an alert to the remote monitoring support device 120.

[0059] Like the control board for operation panel 133, the control board for operation panel 135 generates an up-call signal in response to an input operation on a hall call button by a user of elevator 130 or the like, and outputs the generated up-call signal to control board 136. When an up-call signal is output from the control board for operation panel 135, control board 136 generates various down-control signals based on the up-call signal output from the control board for operation panel 135, just as when a signal is output from the control board for operation panel 133, and controls the operation of elevator 130 by outputting the generated down-control signals to the appropriate parts.

[0060] The remote monitoring support device 120 includes a communication I / F (Interface) 201, a relay board 202, a monitoring control board 203, a memory 204, etc. The communication I / F 201 is connected to a rotary encoder 121 attached to the output shaft of the hoisting machine 132a, and receives input of a signal output from the rotary encoder 121. The signal received as input from the tally encoder 121 is output to the monitoring control board 203.

[0061] The communication I / F 201 is also connected to the car position detection sensor 131a and receives an input of a signal output from the car position detection sensor 131a. The communication I / F 201 outputs the signal received as input from the car position detection sensor 131a to the monitoring control board 203.

[0062] If the elevator 130 is equipped with sensors for detecting the position of the car 131 instead of (or in addition to) the car position detection sensor 131a and the plate, the communication I / F 201 is connected to the sensors and receives input of signals output from the sensors. In this case, the communication I / F 201 outputs the signals received as input from the sensors to the monitoring control board 203.

[0063] Furthermore, the communication I / F 201 is connected to the network 102. This allows the remote monitoring support device 120 to communicate (data communicate) with the management server computer 110 via the communication I / F 201. The communication I / F 201 is connected to the public voice network 101, which is a network for voice communication, in addition to the network 102 for data communication. This allows a person inside the car 131 of the elevator 130 to communicate directly with an operator 141 of the maintenance management company 140.

[0064] The relay board 202 analyzes the various signals output from the control board 136 and outputs the analysis results to the monitoring and control board 203. The various signals output from the control board 136 differ depending on the model of the elevator 130, etc. When analyzing, the relay board 202 converts the various signals output from the control board 136 into a format that can be processed by the monitoring and control board 203 and outputs the converted signals. This makes it possible to remotely monitor the elevator 130 regardless of the model of the elevator 130.

[0065] The monitoring and control board 203 stores the analysis results output from the relay board 202, for example, in the memory 204. The memory 204 may store a judgment threshold value when the monitoring and control board 203 judges the operating state of the hoisting machine 132a. The monitoring and control board 203 may store the signal received as input by the relay board 202 directly in the memory 204 without analyzing it. The monitoring and control board 203 can be realized by a CPU (Central Processing Unit) or the like.

[0066] The memory 204 can be realized by a non-volatile storage medium that retains stored information even when the power supply is cut off. Specifically, the memory 204 can be realized by, for example, a flash memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an EPROM (Erasable Programmable Read-Only Memory), or the like. This can be achieved by using a programmable read-only memory (PROM).

[0067] The monitoring and control board 203 also determines the operating state of the car 131 based on signals output from the rotary encoder 121 and the car position detection sensor 131a. Specifically, the monitoring and control board 203 determines, for example, whether the car 131 is stopped or moving. The monitoring and control board 203 may also determine, for example, the position of the car 131. The monitoring and control board 203 may also determine, for example, whether or not the car 131 is vibrating abnormally.

[0068] If the elevator 130 is equipped with sensors for detecting the position of the car 131 instead of (or in addition to) the car position detection sensor 131a and the plate, the monitoring control board 203 determines the operating state of the car based on signals output from these sensors. may be determined.

[0069] Furthermore, the monitoring control board 203 generates a signal to be transmitted based on the analysis result output from the relay board 202, and transmits the generated signal to the management server computer 110 via the communication I / F 201 connected to the network 102. Specifically, when the monitoring control board 203 receives, via the relay board 202, a signal indicating that an emergency button has been operated, output from the control board 136 (a signal for issuing an alarm), the monitoring control board 203 transmits to the management server computer 110 a predetermined signal indicating that abnormal operation has been detected in the elevator 130.

[0070] In particular, when a signal indicating abnormal operation (a signal for issuing an alarm) is output from the control board 136 and the monitoring control board 203 acquires the signal for issuing an alarm via the relay board 202, the monitoring control board 203 transmits to the management server computer 110 a predetermined signal indicating that abnormal operation has been detected in the elevator 130.

[0071] In addition, when the monitoring control board 203 receives signals (all of which are alarm signals) output from the control board 136 indicating an earthquake, an abnormal stop of the car 131, insufficient lighting inside the car 131, abnormal mechanical sounds picked up using a microphone on the operation panel 133, abnormal sounds such as screams or yelling, the inoperability of doors 131b and 134a, or an occupant trapped inside the car 131, in addition to when the emergency button is operated, the monitoring control board 203 transmits a predetermined signal to the management server computer 110 indicating that abnormal operation has been detected in the elevator 130.

[0072] Alternatively, the monitoring control board 203 may acquire signals (up signals) output from each part of the elevator 130 and signals (down signals) output from the control board 136 to each part of the elevator 130 via the relay board 202, and based on the acquired signals, send a specified signal to the management server computer 110 indicating that abnormal operation has been detected in the elevator 130.

[0073] Specifically, the monitoring control board 203 receives an up signal from a sensor equipped in the elevator 130, indicating that the doors 131b and 134a are not operating, and transmits to the control board 136, based on the received signal, a predetermined signal indicating that abnormal operation has been detected in the elevator 130, to the management server computer 110.

[0074] Specifically, the monitoring control board 203 acquires, for example, a down signal from the control board 136 instructing the hoisting machine 132a to make an emergency stop, and based on the acquired signal, transmits a predetermined signal to the management server computer 110 indicating that abnormal operation has been detected in the elevator 130.

[0075] Furthermore, when a signal indicating that an emergency button has been operated (a signal for issuing an alarm) is output from the control board 136 and the monitoring control board 203 receives the signal for issuing an alarm via the relay board 202, the monitoring control board 203 sends a call signal to the telephone 142 via the public voice network 101 or the like. This enables the passenger in the car 131 to use the microphone and speaker provided on the operation panel 133 to carry out voice communication (a call) with the operator 141 of the maintenance management company 140.

[0076] (Functional configuration of remote monitoring support device 120) Next, a functional configuration of the remote monitoring support device 120 will be described. Fig. 3 is a block diagram showing the functional configuration of the remote monitoring support device 120. As shown in Fig. 3, the functions of the remote monitoring support device 120 include an acquisition unit 301, a determination unit 302, a storage unit 303, a transmission unit 304, and , is realized by

[0077] The acquisition unit 301 acquires a signal output from the rotary encoder 121. The acquisition unit 301 also acquires a signal output from the car position detection sensor 131a. Specifically, the acquisition unit 301 can be realized by, for example, a communication I / F 201 connected to the rotary encoder 121 and the car position detection sensor 131a.

[0078] Furthermore, the acquiring unit 301 may acquire signals output from each component included in the elevator 130 in addition to the rotary encoder 121 and the car position detection sensor 131a. In this case, when the acquiring unit 301 acquires a predetermined signal (such as a signal instructing an inspection) output from the management server computer 110 to the remote monitoring support device 120, the acquiring unit 301 acquires signals output from each component included in the elevator 130 in addition to the rotary encoder 121 and the car position detection sensor 131a. Alternatively, the acquiring unit 301 may constantly acquire signals output from each component included in the elevator 130 in addition to the rotary encoder 121 and the car position detection sensor 131a.

[0079] The determination unit 302 determines the operating state of the hoist 132a based on the signal acquired by the acquisition unit 301. Specifically, the determination unit 302 can be realized by, for example, the monitoring and control board 203. The determination unit 302 determines whether the hoist 132a is stopped or operating based on, for example, the signal acquired by the acquisition unit 301 from the rotary encoder 121.

[0080] Furthermore, for example, when the determination unit 302 determines that the hoist 132a is driving, it may further determine at least one of the rotation direction and rotation speed of the hoist 132a. By determining the rotation direction of the hoist 132a, it is possible to identify the movement direction of the car 131. By determining the rotation speed of the hoist 132a, it is possible to determine the movement speed of the car 131.

[0081] The determination unit 302 may further determine whether the moving speed of the car 131 exceeds a predetermined upper limit value and whether it is below a predetermined lower limit value, based on the signal acquired by the acquisition unit 301. The upper limit value and the lower limit value used by the determination unit 302 to determine the moving speed of the car 131 are stored in the storage unit 303.

[0082] Furthermore, the determination unit 302 may determine, for example, whether or not there is unevenness in the rotation of the hoist 132a. By determining whether or not there is unevenness in the rotation of the hoist 132a, it is possible to determine whether or not there is abnormal vibration in the car 131. Specifically, the determination unit 302 determines whether or not there is unevenness in the rotation of the hoist 132a by identifying the rotation direction, rotation speed, rotation angle, etc. of the hoist 132a per unit time based on the signal acquired by the acquisition unit 301 from the rotary encoder 121, for example, and thereby can determine whether or not there is abnormal vibration in the car 131. For example, the determination unit 302 can determine that there is abnormal vibration in the car 131 when there is extreme fluctuation in the change in the rotation direction or rotation speed of the hoist 132a per unit time.

[0083] Alternatively, specifically, the determination unit 302 may determine whether or not abnormal vibration of the car 131 is occurring based on the results of comparing the rotation direction, rotation speed, rotation angle, etc. of the hoisting machine 132a per unit time, which are identified based on the signal acquired by the acquisition unit 301 from the rotary encoder 121, with pre-stored thresholds. In this case, specifically, the determination unit 302 can be realized by, for example, the monitoring and control board 203, the memory 204, etc.

[0084] Further, the determination unit 302 determines whether the acquisition unit 301 receives the signal from the rotary encoder 121. The position of the car 131 may be determined based on the acquired signal. Specifically, for example, the acquisition unit 301 can determine the position of the car 131 by identifying the rotation direction, rotation speed, rotation angle, etc. of the hoisting machine 132a based on the signal acquired from the rotary encoder 121.

[0085] Furthermore, the determination unit 302 may determine the position of the basket 131 based on, for example, signals acquired by the acquisition unit 301 from the rotary encoder 121 and the basket position detection sensor 131a. In this way, by determining the position of the basket 131 based on signals acquired from the basket position detection sensor 131a in addition to the rotary encoder 121, the position of the basket 131 can be determined with high accuracy.

[0086] The determination unit 302 may further determine whether the operating state of the car 131 is a normal operating state based on the signal acquired by the acquisition unit 301. For example, the determination unit 302 determines that the operating state of the car 131 is not a normal operating state when the car 131 is vibrating abnormally. Furthermore, for example, the determination unit 302 determines that the operating state of the car 131 is not a normal operating state when acceleration equal to or greater than a predetermined value is detected.

[0087] The storage unit 303 stores the signal acquired by the acquisition unit 301, information relating to the determination result of the determination unit 302, etc. Specifically, the storage unit 303 can be realized by, for example, the memory 204. The storage unit 303 may store either the signal acquired by the acquisition unit 301 or information relating to the determination result of the determination unit 302, or may store both.

[0088] The transmitting unit 304 transmits notification information regarding the determination result of the determining unit 302 to the management server computer 110. Specifically, the transmitting unit 304 can be realized, for example, by the communication I / F 201 connected to the network 102. The transmitting unit 304 may transmit the notification information regarding the determination result of the determining unit 302 to the management server computer 110 each time the determining unit 302 makes the determination, or may transmit the notification information to the management server computer 110 at predetermined intervals. When transmitting the notification information to the management server computer 110 at predetermined intervals, the transmitting unit 304 transmits information stored in the memory unit 303 that has not been transmitted to the management server computer 110.

[0089] Furthermore, only when the determination unit 302 determines that the operating state of the cart 131 is not the normal operating state, the transmission unit 304 may transmit notification information indicating that the operating state of the cart 131 is not the normal operating state to the management server computer 110. In this case, the transmission unit 304 may also transmit information stored in the memory unit 303 that has not been transmitted to the management server computer 110, in addition to the notification information indicating that the operating state of the cart 131 is not the normal operating state.

[0090] The notification information may be, for example, the output value of the rotary encoder 121. The notification information may also be, for example, the output values ​​of the rotary encoder 121 and the basket position detection sensor 131a. Furthermore, the notification information may be, for example, information notifying the determination result of the determination unit 302 (whether the basket 131 is stopped or moving, the position of the basket 131, whether or not there is abnormal vibration of the basket 131, etc.).

[0091] The notification information may also be, for example, information notifying that the operating state of the hoist 132a is not a normal operating state. The notification information may include information indicating the date and time when the signal output from the rotary encoder 121 was acquired or the date and time when the operating state of the hoist 132a was determined.

[0092] (Processing procedure of the remote monitoring support device 120) Next, a description will be given of the processing procedure of the remote monitoring support device 120. Fig. 4 is a flowchart showing the processing procedure of the remote monitoring support device 120. In the flowchart of Fig. 4, first, the device waits until it acquires the signal output from the rotary encoder 121 (the output signal of the rotary encoder 121) (step S401: No).

[0093] In step S401, if a signal output from the rotary encoder 121 is acquired (step S401: Yes), it is determined based on the acquired signal whether the hoist 132a is driving (step S402). In step S402, it may be determined whether the hoist 132a is stopped. In step S402, if the hoist 132a is not driving (step S402: No), the process proceeds to step S405.

[0094] On the other hand, in step S402, if the hoisting machine 132a is driven (step S402: Yes), a signal output from the car position detection sensor 131a is acquired (step S403). Then, based on the signal acquired in step S403, the position of the car 131 is determined (step S404).

[0095] Furthermore, the operating state of the hoist 132a is determined based on step S401: Yes, the signal acquired in step S403, etc. (step S405). In step S405, for example, it is determined whether the hoist 132a is stopped or operating. In step S405, for example, the moving speed of the car 131 may also be determined. Specifically, for example, it may be determined whether the moving speed of the car 131 exceeds a predetermined upper limit value or falls below a predetermined lower limit value.

[0096] Also, in step S405, for example, it may be determined whether or not there is unevenness in the rotation of the hoisting machine 132a. Also, in step S405, for example, it may be determined whether or not there is abnormal vibration of the car 131, or the position of the car 131. Specifically, for example, abnormal vibration of the car 131 can be determined based on the rotation direction, rotation speed, rotation angle, etc. of the hoisting machine 132a per unit time.

[0097] Next, based on the determination result in step S405, it is determined whether the operating state of the hoist 132a is in a normal operating state (step S406). In step S406, it is determined that the operating state of the hoist 132a is in a normal operating state when, for example, the moving speed of the car 131 exceeds a predetermined upper limit, falls below a predetermined lower limit, or there is abnormal vibration of the car 131.

[0098] In step S406, if the operating state of the hoisting machine 132a is not the normal operating state (step S406: No), notification information is generated (step S407). Thereafter, the notification information generated in step S407 is transmitted to the management server computer 110 (step S408), and the series of processes ends.

[0099] On the other hand, if the operating state of the car 131 is the normal operating state in step S406 (step S406: Yes), information about the determination result is stored in memory 204 (step S409), and the process proceeds to step S401. The information stored in step S409 is sent to the management server computer 110 together with notification information in step S408.

[0100] In the above-described embodiment, an example has been described in which the rotary encoder 121 attached to the car 131 is used to monitor the operating state of the hoisting machine 132a by the remote monitoring support device 120 attached to the elevator 130, but the present invention is not limited to this. The encoder 121 may be one that was provided when the elevator 130 was installed, or may be one that was added later after the elevator 130 was installed.

[0101] Furthermore, the remote monitoring support device 120 may be provided in an elevator shaft, a machine room, etc. Furthermore, the remote monitoring support device 120 may be provided in the car 131. In this case, the remote monitoring support device 120 may be provided outside the car 131, or may be provided inside the car 131.

[0102] The remote monitoring support device 120 provided inside the car 131 may include a display screen and a speaker in addition to the communication I / F 201, relay board 202, monitoring control board 203, memory 204, etc. In such a remote monitoring support device 120, management information such as advertisements, operation status, or inspection schedules can be notified within the car 131 via the display screen and speaker.

[0103] In this way, by utilizing the functions of a device retrofitted after the installation of the elevator 130, it is possible to achieve both a reduction in maintenance costs and an improvement in safety and convenience for users of the elevator 130. Specifically, such a remote monitoring support device 120 equipped with a display screen can be realized by, for example, a flat-plate-shaped device known as a tablet terminal.

[0104] Furthermore, if a device such as a tablet terminal that is retrofitted after the installation of the elevator 130 has a communication function, the remote monitoring support device 120 according to the present invention can be realized by the device retrofitted after the installation of the elevator 130. This makes it possible to achieve both a further reduction in maintenance and management costs and an improvement in the safety of users of the elevator 130.

[0105] As described above, the remote monitoring support device 120 of an embodiment of the present invention is characterized by acquiring a signal output from a rotary encoder 121 that detects the rotation of a hoist 132a that raises and lowers a car 131 of an elevator 130, and transmitting notification information regarding the determination result of the operating status of the hoist 132a based on the acquired signal to a management server computer 110 installed in a remote location from the elevator 130.

[0106] According to the remote monitoring support device 120 of the embodiment of the present invention, the operating state of the hoist 132a can be determined based on a signal output from the rotary encoder 121 that detects the rotation of the hoist 132a, thereby making it possible to properly determine the operating state of the hoist 132a with a simple configuration and in accordance with certain conditions set in the monitoring control board 203.

[0107] Furthermore, since the remote monitoring support device 120 can communicate with the management server computer 110, not only elevators 130 that have communication functions with external devices such as the management server computer 110 at the time of installation, but also elevators 130 that do not have communication functions at the time of installation can be equipped with an encoder and remote monitoring support device 120 at a later date to send information regarding the judgment results to the management server computer 110.

[0108] This allows information regarding the judgment results to be shared between the management server computer 110 and the remote monitoring support device 120, and the management server computer 110 can quickly and reliably detect any problems that occur in the hoist 132a based on uniform judgment criteria, and can use the management server computer 110 to select the most suitable worker to deal with the detected problem, and dispatch them quickly to the site.

[0109] Then, by quickly dispatching the most suitable worker to the site to deal with the detected trouble, it is possible to quickly deal with the trouble related to the hoisting machine 132a of the elevator 130. This shortens the time that the elevator 130 is unavailable, and ensures convenience for users of the elevator 130.

[0110] In this way, according to the remote monitoring support device 120 of the embodiment of the present invention, it is possible to prevent variations in the quality of response work to troubles related to the hoisting machine 132a of the elevator 130 due to differences in the experience and ability of workers with a simple configuration, thereby realizing high-quality remote monitoring.

[0111] Furthermore, according to the remote monitoring support device 120 of the embodiment of the present invention, by detecting the occurrence of troubles, etc. that have occurred in the hoisting machine 132a based on standardized judgment criteria, it is possible to shorten the training period for workers compared to conventional methods that detect or predict the occurrence of troubles, etc. based on the experience of workers.

[0112] Specifically, according to the remote monitoring support device 120 of the embodiment of the present invention, for example, it is possible to prevent variations in the timing at which each worker discovers signs of trouble related to the hoisting machine 132a of the elevator 130, and perform maintenance and inspection of the elevator 130 or replacement of components of the elevator 130 at an appropriate time, thereby ensuring the safety of users, improving reliability of the elevator 130, and realizing high-quality remote monitoring that allows users to use the elevator 130 with peace of mind.

[0113] Furthermore, according to the remote monitoring support device 120 of the embodiment of the present invention, it is possible to easily detect signs of trouble occurring related to the hoisting machine 132a of the elevator 130, so that a response can be made before the trouble actually occurs, thereby reducing the occurrence of situations where workers need to be called out in an emergency.

[0114] Furthermore, the remote monitoring support device 120 according to the embodiment of the present invention makes it easier to detect signs of trouble occurring related to the hoisting machine 132a of the elevator 130, thereby improving the efficiency and accuracy of purchasing and inventory plans for replacement parts, etc. This in turn makes it possible to reduce various costs associated with the operation and management of the elevator 130.

[0115] Furthermore, the remote monitoring support device 120 of the embodiment of the present invention is characterized in that it determines whether the hoisting machine 132a is stopped or operating based on a signal output from a rotary encoder 121 that detects the rotation of the hoisting machine 132a.

[0116] According to the remote monitoring support device 120 of the embodiment of the present invention, by determining whether the hoisting machine 132a is stopped or running, it is possible to grasp the number of times the elevator 130 has been started and the operating time, thereby grasping the degree of wear on the parts that make up the elevator 130 and appropriately setting the inspection frequency and part replacement timing for the elevator 130. This allows the inspection frequency and part replacement of the elevator 130 to be appropriately performed, reducing maintenance costs and the burden on workers.

[0117] Furthermore, according to the remote monitoring support device 120 of the embodiment of the present invention, it is possible to identify the number of times the elevator 130 has been started by determining whether the hoisting machine 132a is stopped or running, i.e., whether the car 131 is stopped or moving. This also makes it possible to grasp the degree of wear of the parts that make up the elevator 130, and to appropriately set the inspection frequency and part replacement timing of the elevator 130, thereby improving the safety of the elevator 130. By appropriately performing inspection frequency and part replacement, maintenance costs can be reduced and the burden on workers can be reduced.

[0118] Furthermore, the remote monitoring support device 120 of the embodiment of the present invention is characterized in that it determines at least one of the rotation direction and rotation speed of the hoisting machine 132a based on a signal output from a rotary encoder 121 that detects the rotation of the hoisting machine 132a.

[0119] According to the remote monitoring support device 120 of the embodiment of the present invention, by determining at least one of the rotation direction and rotation speed of the hoist 132a, it is possible to determine whether the hoist 132a, i.e., the car 131, is operating normally. Specifically, it is possible to determine, for example, whether the car 131 is accelerating and decelerating smoothly, whether the moving speed of the car is excessively high or low, etc.

[0120] This allows for the occurrence of trouble or signs of trouble to be detected quickly and reliably, and the most suitable worker to deal with the detected trouble can be selected using the management server computer 110 or the like, and dispatched to the site quickly.

[0121] This makes it possible to prevent variations in the quality of response work to problems related to the hoisting machine 132a of the elevator 130 due to differences in the experience and ability of workers using a simple configuration, and by realizing high-quality remote monitoring, it is possible to ensure the safety of users, improve reliability in the elevator 130, and enable users to use the elevator 130 with peace of mind, thereby realizing high-quality remote monitoring.

[0122] The remote monitoring support device 120 according to the embodiment of the present invention is characterized in that it determines whether or not there is unevenness in the rotation of the hoisting machine 132a.

[0123] According to the remote monitoring support device 120 of the embodiment of the present invention, it is possible to determine whether or not there is abnormal vibration in the car 131 by determining whether or not there is unevenness in the rotation of the hoisting machine 132a. This makes it possible to quickly detect signs of a malfunction, and therefore to take measures to prevent a malfunction before it actually occurs.

[0124] This reduces the time that elevator 130 cannot be used during inspection compared to when measures such as replacing parts are taken after a malfunction actually occurs, ensuring the safety of users and improving reliability of elevator 130, allowing users to use elevator 130 with peace of mind.

[0125] Furthermore, the remote monitoring support device 120 of this embodiment of the present invention is further characterized in that it acquires a signal output from the car position detection sensor 131a and determines the position of the car 131 based on the acquired signal.

[0126] According to the remote monitoring support device 120 of the embodiment of the present invention, by taking into consideration the signal output from the car position detection sensor 131a, it is possible to determine, for example, whether the positions of the floor surface of the car 131 and the floor surface of the landing 134 are aligned when the car 131 is stopped, and to detect early any defects such as a difference in level between the floor surface of the car 131 and the floor surface of the landing 134. This improves the reliability of the elevator 130, ensures the safety of users, and enables users to use the elevator 130 with peace of mind.

[0127] Furthermore, the remote monitoring support device 120 according to the embodiment of the present invention detects the position of the car 1 based on the signals output from the rotary encoder 121 and the car position detection sensor 131a. The presence or absence of an abnormality may be determined based on the correlation between the position of the car 31 and the moving speed of the car 131.

[0128] Such a remote monitoring support device 120 determines the position of the car 131 based on the signals output from the rotary encoder 121 and the car position detection sensor 131a, and determines the moving speed of the car 131 based on the signal output from the rotary encoder 121, thereby making it possible to determine whether or not there is an abnormality in the correlation between the position of the car 131 and the moving speed of the car 131. Therefore, it is possible to detect, for example, malfunctions such as the car 131's stopping position moving significantly and inadvertently, or the car 131 passing the stopping position of the floor where the call came in, the top floor, or the bottom floor.

[0129] This allows for the occurrence of trouble or signs of trouble to be detected quickly and reliably, and the most suitable worker to deal with the detected trouble can be selected using the management server computer 110 or the like, and dispatched to the site quickly.

[0130] In addition, the remote monitoring support device 120 of this embodiment of the present invention is characterized in that when it determines that the operating state of the hoisting machine 132a is not in a normal operating state, it sends notification information including information regarding the state of the elevator 130 to the management server computer 110.

[0131] According to the remote monitoring support device 120 of the embodiment of the present invention, the remote monitoring support device 120 determines whether the operating state of the hoisting machine 132a is in a normal operating state, and if it determines that it is not in a normal operating state, it can notify the management server computer 110 of this fact.

[0132] This reduces the processing load on the management server computer 110, which communicates with the remote monitoring support device 120, and if a situation occurs that is not in a normal operating state, the most suitable worker to deal with the situation can be quickly dispatched to the site, and any problems that occur with the elevator 130 can be dealt with promptly, shortening the time that the elevator 130 is unavailable and ensuring convenience for users of the elevator 130.

[0133] Furthermore, the remote monitoring support device 120 according to the embodiment of the present invention is characterized in that the rotary encoder 121 is not connected to the control board 136 of the elevator 130 .

[0134] According to the remote monitoring support device 120 of the embodiment of the present invention, the operating state of the hoisting machine 132a is determined based on a signal output from the rotary encoder 121 that is not connected to the control board 136 of the elevator 130, and the elevator 130 can be remotely monitored using the rotary encoder 121 that is retrofitted to the elevator 130. This allows an independent maintenance service company for the elevator 130 to monitor the operating state of the elevator 130 from a remote location.

[0135] In a situation where it is difficult for an independent elevator 130 maintenance service company to install components such as sensors required for remote monitoring in advance when installing an elevator 130, the elevator 130 manager or other person in charge of maintenance management has no choice but to carry out the management within the scope specified by the manufacturer of each elevator 130, and there is a situation where the elevator 130 manager or other person in charge of maintenance management has little freedom.

[0136] Additionally, communication between the control board 136 and the management server computer 110 is typically performed via a media Communication is often carried out using a unique signal for each elevator, and it is easy for manufacturers of each elevator 130 to uniquely set the costs required for maintaining and managing the elevator 130 (maintenance costs), making it difficult to reduce the maintenance costs borne by those responsible for managing the elevator 130.

[0137] While the safety and sense of security of elevator 130 users tends to increase the more frequently elevator 130 is maintained and inspected, if the frequency of maintenance and inspection is limited to or close to the minimum frequency specified in the guidelines of the Ministry of Land, Infrastructure, Transport and Tourism in order to reduce maintenance and management costs in the above-mentioned situation, it becomes difficult to achieve both increased flexibility in maintenance and management, including reduced maintenance and management costs, and increased safety for elevator 130 users.

[0138] In contrast, according to the remote monitoring support device 120 of the embodiment of the present invention, even an independent elevator 130 maintenance service company can remotely monitor the elevator 130, which makes it possible for independent elevator 130 maintenance service companies to enter the elevator 130 remote monitoring business, thereby achieving both increased flexibility in maintenance management, including reduced maintenance management costs, and improved safety for users of the elevator 130. [Industrial Applicability]

[0139] As described above, the remote monitoring support device of the present invention is useful as a remote monitoring support device that supports remote monitoring of elevators, and is particularly suitable as a remote monitoring support device that supports remote monitoring of elevators by independent elevator maintenance service companies. [Explanation of symbols]

[0140] 100 Remote Monitoring System 110 Management Server Computer 120 Remote monitoring support device 121 rotary encoder 130 Elevator 131 Basket 131a Basket position detection sensor 132a hoisting machine Platform 134 136 Control board 140 Maintenance Management Company 201 Communication I / F 202 Relay board 203 Monitoring and control board 204 memory 301 Acquisition Department 302 Judgment Department 303 Storage section 304 Transmission Unit

Claims

1. an acquisition means for acquiring a signal output from an encoder that detects the rotation of a hoist that raises and lowers an elevator car; a determination means for determining an operating state of the hoisting machine based on the signal acquired by the acquisition means; a transmitting means for transmitting notification information relating to the determination result of the determining means to a management server computer installed at a remote location of the elevator; A remote monitoring support device comprising:

2. 2. The remote monitoring support device according to claim 1, wherein the determining means determines whether the hoist is stopped or operating based on the signal acquired by the acquiring means.

3. 2. The remote monitoring support device according to claim 1, wherein the determining means determines at least one of the rotation direction and the rotation speed of the hoisting machine based on the signal acquired by the acquiring means.

4. 2. The remote monitoring support device according to claim 1, wherein the determining means determines whether or not there is unevenness in the rotation of the hoisting machine based on the signal acquired by the acquiring means.

5. The acquisition means further acquires a signal output from a sensor used to detect the position of the car, 2. The remote monitoring support device according to claim 1, wherein the determining means determines the position of the car based on the signal acquired by the acquiring means.

6. The remote monitoring support device described in claim 5, characterized in that the judgment means determines whether or not there is an abnormality in the correlation between the position of the car and at least one of the rotation direction and rotation speed of the hoist based on the signal acquired by the acquisition means.

7. The determination means determines whether the operation state of the hoisting machine is a normal operation state, A remote monitoring support device as described in any one of claims 1 to 6, characterized in that the transmitting means transmits the notification information including information regarding the elevator status to the management server computer when the judgment means determines that the operating status is not a normal operating status.

8. 6. The remote monitoring support device according to claim 1, wherein the encoder is not connected to a control board of the elevator.

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