JP2009227400A - Elevator system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator system capable of being applicable to a building with a long lifting stroke and easy installation adjustment and maintenance with high security. <P>SOLUTION: The elevator system is provided with: a hoistway side upper transceiving part 20A for performing radio communication by optical radio communication provided on an upper part of a hoistway 6; a car side upper transceiving part 21A for performing radio communication with the hoistway side upper transceiving part 20A by optical radio communication provided on a side surface of the car 3; a hoistway side lower transceiving part 20B for performing radio communication by optical radio communication provided on a lower part of the hoistway 6; and a car side lower transmitting/receiving part 21B for performing radio communication with the hoistway side lower transceiving part 20B by optical radio communication provided on a side surface of the car 3 in parallel with the car side upper transceiving part 21A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator system that performs wireless communication between a car control unit and an elevator control unit provided in a car using electromagnetic waves.

  In general, in an elevator system, a method of performing signal transmission and power feeding between an elevator control device or a group management control device and a car via a tail cord is the mainstream.

  In recent years, transmission of high-speed and large-capacity data has become necessary in accordance with IT demands such as security enhancement by installing surveillance cameras and information display in a car.

As such an elevator system, there is known a system in which a dedicated cable such as a video / audio coaxial cable or an optical fiber is added to the tail cord for transmission. In addition, methods for wireless transmission using electromagnetic waves such as light and radio waves without using a tail cord (for example, Patent Document 1 and Patent Document 2) have been proposed.
JP 2001-278557 A JP 2006-256783 A

  In the elevator system described above, the method of adding a dedicated cable in the tail cord significantly increases the cost as compared with the conventional tail cord.

  In addition, the method of wireless transmission using electromagnetic waves that are restricted by the Radio Control Law complicates the means for extending the transmission distance as the ascending / descending stroke becomes high. Since different specialized knowledge is required, it is unavoidable to increase the cost of training the installation coordinator and maintenance staff in addition to the equipment cost. In addition, when a general-purpose wireless LAN is used, a transmission system can be constructed at a low cost. However, the number of usable frequency channels is limited, so that interference between the hoistway and the outside is likely to occur, and the effective transmission rate. Inevitable decrease in

  Furthermore, special security measures are required to prevent the interception of information such as surveillance camera data. In addition, the optical space transmission method does not require special security measures for information interception, but it is necessary to secure a complete line-of-sight space as a transmission path. The installation position is restricted. Furthermore, it is difficult to align the optical axis even during installation adjustment because it is affected by the inclination of the car and the change in the car position caused by the uneven distribution of the car passengers and the car position in the hoistway. was there.

  An object of the present invention is to provide an elevator system that can cope with a building having a long ascending / descending stroke, can be easily installed, adjusted, and maintained with high security.

  An elevator system according to an example of the present invention includes an image of a monitoring camera provided on a car that moves in a vertical direction in a hoistway, sound collected by a sound collecting device, a control signal of the monitoring camera, An elevator system that wirelessly transmits at least a part of state data, the hoistway-side upper transmitting / receiving device that performs wireless communication using an electromagnetic wave having a wavelength shorter than that of the millimeter wave or the millimeter wave provided in the upper part of the hoistway; A first car-side transmitting / receiving device that performs wireless communication with the hoistway-side upper transmitting / receiving device using millimeter waves provided on a side surface of the car or an electromagnetic wave having a wavelength shorter than the millimeter wave, and a millimeter provided at the lower part of the hoistway A hoistway-side lower transmitting / receiving device that performs radio communication using electromagnetic waves having a wavelength shorter than a wave or millimeter wave, and the first car-side transmitting / receiving device on the side surface of the car Characterized by comprising the vignetting millimeter wave or the second cab side transceiver performs the hoistway lower transceiver and wireless communication by using more millimeter-wave electromagnetic radiation of shorter wavelength.

  According to the present invention, it is possible to cope with a building having a long ascending / descending stroke, and can be easily adjusted and maintained with high security.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
First, an elevator system according to the first embodiment will be described with reference to FIGS.
As shown in FIG. 1, the elevator system includes an elevator control unit 1, a hoisting machine 2, a car 3, a main rope 4, a counterweight 5, a hoistway 6, car call buttons 7A to 7D, a signal converter 8, Transmission cables 9A, 9B, car control unit 10, signal conversion unit 11, machine room 18, elevator halls 19A-19D, hoistway side upper radio transmitting / receiving unit 20A, hoistway side lower radio transmitting / receiving unit 20B, car side upper radio transmitting / receiving unit 21A, a car side lower wireless transmission / reception unit 21B, a wireless transmission / reception unit mounting bracket 22, a surveillance camera 30 and the like.

  The hoisting machine 2 is installed in a machine room 18 on the upper side of the hoistway 6 that passes through the elevator halls 19A to 19D on each floor of the building. A main rope 4 having an elevator car 3 connected to one end and a counterweight 5 connected to the other end is hung on the hoist 2. The hoisting machine 2 rotates based on a command from the elevator control unit 1 composed of a computer and moves the car 3 to designated elevator halls 19A to 19D. In the elevator halls 19A to 19D on each floor, car call buttons 7A to 7D incorporating a small computer are installed next to the door, and the hall 3 informs that the car 3 is approaching the corresponding floor above the door. A lantern is installed. The car call buttons 7A to 7D on each floor are cascade-connected to RS-485 and LAN communication cables. The elevator control unit 1 is connected to this communication cable. The hall lantern lights up in response to a command from the car call buttons 7A to 7D. Therefore, the hall call that designates the own floor registered by the elevator hall user with the car call buttons 7A to 7D is transmitted to the elevator controller 1 via the communication cable.

  The car 3 is equipped with a car control unit 10 that performs overall control of devices such as a door control device (not shown), an indicator (not shown), a destination floor registration button (not shown), and a surveillance camera 30. The car control unit 10 transmits video signals and audio signals of the monitoring camera 30, control signals and status information of the monitoring camera 30, control signals between the elevator control unit 1 and the like via an internet protocol (IP) via a communication interface (not shown). ) And the like, and transmitted to the signal conversion unit 11 that performs signal conversion processing. The signal conversion unit 11 transmits the converted signal to the radio transmission / reception units 21A and 21B. The car control unit 10 performs door opening / closing control and communication with the elevator control unit 1 using the car-side upper radio transmission / reception unit 21A or the car-side lower radio transmission / reception unit 21B.

  A car-side upper radio transmitter / receiver 21A and a car-side lower radio transmitter / receiver 21B are provided on the side surface of the car in a vertical direction via a radio transmitter / receiver mounting bracket 22. The car-side upper radio transmitter / receiver 21 </ b> A communicates with the hoistway-side upper radio transmitter / receiver 20 </ b> A provided at the upper part of the hoistway 6, and the car-side lower radio transmitter / receiver 21 </ b> B is a hoistway-side provided at the lower part of the hoistway 6. It communicates with the lower radio transceiver 20B.

  The car-side upper radio transmitting / receiving unit 21A and the hoistway-side upper radio transmitting / receiving unit 20A, and the car-side lower radio transmitting / receiving unit 21B and the hoistway-side lower radio transmitting / receiving unit 20B have millimeter waves with higher directivity, or wavelengths longer than millimeter waves. Wireless communication using short electromagnetic waves. In the case of this embodiment, wireless communication is performed by optical wireless communication using an electromagnetic wave having a wavelength shorter than that of the millimeter wave, that is, a light ray between infrared rays and visible rays. By using a millimeter wave with high directivity or an electromagnetic wave having a wavelength shorter than that of the millimeter wave, leakage of communication data can be prevented.

  The radio transmission / reception units 20A and 20B convert the received signals into electric signals, and transmit the converted signals to the signal conversion unit 8 via the transmission cables 9A and 9B. The signal conversion unit 8 transmits to the elevator control unit 1. Further, the signal conversion unit 8 converts data transmitted from the elevator control unit 1 to the car control unit 10 into an Internet protocol (IP) or the like and transmits the data to the radio transmission / reception units 21A and 21B.

  The signal conversion unit 8 and the wireless transmission / reception units 20A and 20B composed of an optical space transmission device and the like are configured to be connected via an Ethernet (registered trademark) cable or an optical fiber cable.

  The elevator control unit 1 is connected to an unillustrated indicator and car call buttons 7A, 7B, 7C, and 7D provided in the elevator halls 19A, 19B, 19C, and 19D via a communication interface (not illustrated). ing.

  Further, the elevator control unit 1 is configured to output a control signal for selecting a transmission path to the signal conversion unit 8, and to selectively switch the output from the signal conversion unit 8 to the radio transmission / reception unit 20A and the radio transmission / reception unit 20B. .

  The car 3 and the suspension weight 5 move up and down in the hoistway 6 along guide rails provided at both ends. As shown in FIG. 2, the guide rail 40 is configured to be fixed through a bolt hole by a bolt 43 with a rail bracket 41 and a rail clip 42 joined to a building beam 44. Further, the radio transceiver 20A is fixed to the guide rail 40 via the mounting brackets 23A and 23B. The mounting bracket 23 </ b> A is fixed to the guide rail 40 through a bolt hole 45 by a bolt 43 with a rail clip 42.

  Further, as shown in FIG. 3, the wireless transceiver 20A (not shown) is attached so that the attachment position and angle can be adjusted in the B direction with bolts and nuts (not shown) by the elongated holes 26A and 26B of the attachment bracket 23B and pressing bolts. Secure. Further, the mounting bracket 23B is configured by fixing and fixing the mounting position and angle in the A direction with bolts and nuts (not shown) through the long holes 24A and 24B and the bolt holes 25A and 25B of the mounting bracket 23A.

  As shown in FIG. 4, the wireless transmission / reception unit 21A (not shown) can adjust the mounting position and angle in the B direction with bolts and nuts (not shown) using the long holes 26C and 26D of the wireless transmission / reception unit mounting bracket 23C and pressing bolts. Fixed to the mounting. The mounting bracket 23C passes through the bolt hole 27A and the long hole 28A of the wireless transmission / reception mounting bracket 22, and similarly passes through the bolt hole 27B and the long hole 28B of the wireless transmission / reception unit mounting bracket 22 with bolts and nuts (not shown) in the A direction. The mounting position and angle can be adjusted and fixed. Similarly, a wireless transmission / reception unit 21B (not shown) that performs transmission to the lower side of the hoistway 6 is attached in the B direction with bolts and nuts (not shown) by means of elongated holes 26E and 26F of the wireless transmission / reception unit mounting bracket 23D and pressing bolts. The position and angle are adjustable and fixed. The wireless transceiver mounting bracket 23D is a bolt and nut (not shown) that passes through the bolt hole 27C and the elongated hole 28C of the mounting bracket 22, and similarly passes the bolt hole 27D and the elongated hole 28D of the wireless transceiver mounting bracket 22. The mounting position and angle are adjustable and fixed in the direction. The radio transceiver mounting bracket 22 is fixed above or below the car 3. Note that the wireless transceiver mounting bracket 22 is preferably fixed above the car 3 in order to perform the adjustment work more safely.

  The elevator control unit 1 uses elevator car call buttons 7A, 7B, 7C and 7D in the elevator hall, a destination floor registration button (not shown) from the car 3, or an elevator car call generated in cooperation with a security device (not shown). Then, the hoisting machine 2 is driven and controlled, and the car 3 is controlled to land on a predetermined floor. The elevator control unit 1 outputs a control signal for selecting a transmission path to the signal conversion unit 8 when the raising / lowering height of the car is higher than a predetermined height, and the signal conversion unit 8 wirelessly transmits and receives the transmission path. Switching between the unit 20A and the radio transmission / reception unit 21A, the radio transmission / reception unit 20A connected via the signal conversion unit 8 and the radio transmission / reception unit connected via the signal conversion unit 11 connected to the car control unit 10 Bidirectional transmission and reception of wireless data with 21A is performed.

  Similarly, the elevator control unit 1 outputs a control signal for selecting a transmission path to the signal conversion unit 8 and converts the transmission path into a signal when the elevation height of the car 3 is lower than a predetermined height. Switching between the hoistway side lower radio transmitting / receiving unit 20B and the car side lower radio transmitting / receiving unit 21B by the unit 8 and connecting to the hoistway side lower radio transmitting / receiving unit 20B connected via the signal conversion unit 8 and the car control unit 10 The wireless data transmission / reception is performed bi-directionally with the car-side lower wireless transmission / reception unit 21B connected via the signal conversion unit 11.

  The optical axis alignment between the hoistway-side upper wireless transceiver 20A and the car-side upper wireless transceiver 21A is the shortest distance and the maximum distance of transmission distance and almost in the middle ((shortest distance + maximum distance) ÷ 2). This is performed by adjusting and fixing the wireless transmission / reception brackets 23A, 23B, 23C, and 23D so that the state is good.

  According to the present embodiment, when the ascending / descending stroke becomes high, two transmission paths are provided and the transmission path is switched depending on the elevation height of the car. The elevator system in the process can be wirelessly transmitted, and by performing wireless transmission using the optical space transmission method, there is a risk of interception of information such as transmission data even if a surveillance camera compatible with a general-purpose Internet protocol is used. Low. In addition, since the wireless transmission / reception units installed in the car are fixed on the same bracket so as to be adjustable, installation adjustment work such as optical axis alignment can be performed relatively easily. That is, according to the present elevator system, it is possible to provide a user with an elevator system that is high in security and capable of high-speed and large-capacity transmission at low cost.

(Second Embodiment)
Next, an elevator system according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structure same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 5, a car displacement detecting means 50 including a gyro sensor, an inclination angle detection sensor, and the like, and an optical axis correction unit 53 are added to the car 3 having the configuration of the first embodiment. It is configured by adding.

  In FIG. 5, a roller guide 12 having rollers 12A to 12C and rollers 13A to 13C for pressing the guide rail 40 from three directions are provided. The rollers 12A and 12B and the rollers 13A and 13C are in contact with the side surface of the guide rail 40 that is orthogonal to the surface facing the side surface of the car and parallel to the longitudinal direction of the guide rail 40 while being pressed by a spring (not shown). ing. Further, the roller 12C and the roller 13C are in contact with the side surface of the guide rail 40 facing the side surface of the car while being pressed by a spring.

  As shown in FIG. 6, the optical axis correction unit 53 includes an X-axis drive unit 53X that is driven by a servo motor (not shown) in the coordinate axis X direction, a Y-axis drive unit 53Y that is driven by a servo motor (not shown) in the coordinate axis Y direction, The X-axis drive unit 53X and the Y-axis drive unit 53Y are configured by an optical axis correction mechanism control unit 53A that performs position control and speed control or torque control.

  An optical axis correction mechanism control unit 53A is a sensor input / output control unit 53B that controls sensor input / output of the car displacement detection means 50 and the like, calculates an optical axis correction position from the car displacement, calculates an X axis drive unit 53X and a Y axis The optical axis correction calculation unit 53C obtains the movement amount of the drive unit 53Y by calculation, the drive mechanism control unit 53D that servo-controls the X-axis drive unit 53X and the Y-axis drive unit 53Y from the calculated movement amount, and the like.

  The radio transmission / reception unit 21A is fixed to the mounting bracket via the mounting bracket 23C so as to be adjustable. Similarly, the wireless transmission / reception unit 21B is fixed to the mounting bracket 22A via the mounting bracket 23D so as to be adjustable. The mounting bracket 22A is engaged with the X-axis drive unit 53X. The signal conversion unit 11 is configured by connecting a car control unit 10, a monitoring camera 30, and radio transmission / reception units 21A and 21B.

  On the upper side surface and the lower side surface of the car 3, means for smoothly moving the car 3 up and down along the guide rail 40 such as roller guides 12A and 12B, guide shoes (not shown), and a non-contact guide device are attached. ing.

  In the present embodiment configured as described above, the inclination of the car 3 and the position change of the car 3 occur due to the uneven distribution of passengers in the car 3 and the height of the car 3 in the hoistway 6. To do. This displacement is detected by the car displacement detecting means 50 and input to the sensor input / output control unit 53B. Based on the displacement of the car 3 input to the sensor input / output control unit 53B, the optical axis correction position on the coordinate XY plane is calculated by the optical axis correction calculation unit 53C to move the X axis drive unit 53X and the Y axis drive unit 53Y. (Correction amount) is calculated. The drive mechanism control unit 53D servo-controls the X-axis drive unit 53X and the Y-axis drive unit 53Y from the movement amount calculated by the optical axis correction calculation unit 53C to drive the mounting bracket 22A. By driving the mounting bracket 22A, the positions of the wireless transmission / reception unit 21A and the wireless transmission / reception unit 21B fixed to the wireless transmission / reception unit mounting brackets 23A and 23B change simultaneously, and the optical axes of the wireless transmission / reception units 21A and 21B are corrected. The

  In addition, the state information of the optical axis correction unit 53 and the state information of the wireless transmission / reception units 21A and 21B are transmitted to each other via the signal conversion unit 11, and when an abnormality occurs, via the wireless transmission / reception unit 21A or 21B, The signal is transmitted to the signal conversion unit 8 via the radio transmission / reception unit 20A or 20B, and the abnormality information is transmitted to the elevator control unit 1. Furthermore, it is connected to a safety chain (not shown) of the car control unit 10 and abnormal information is transmitted to the elevator control unit 1 via a conventional tail cord (not shown).

  Moreover, in the said embodiment, although the car displacement detection means 50 is set as the structure provided exclusively for a gyro sensor, an inclination angle detection sensor, etc., the structure as shown in FIG. 7 may be sufficient.

  As shown in FIG. 7, roller guide displacement detection means 51X, 51Y, 52X, and 52Y for detecting the displacement of the positions of the rollers 12 and 13 are provided. FIG. 8 shows an example of the configuration of the roller guide 13. As shown in FIG. 8, in the roller guide, rollers 13A, 13B, and 13C are attached to a lever 16 that rotates about a swing shaft 14. The rollers 13 </ b> A, 13 </ b> B, and 13 </ b> C are configured to always contact the side surface of the guide rail 40 by the spring 17 while rotating around the rotation shaft 15. Roller guide displacement detection means 51X, 51Y, 52X, 52Y detects the positions of the roller guides 12A and 12B, such as spring positions, and detects the displacement of the roller guide.

  For example, the displacement amount of the roller guide displacement detection means 51X and the displacement amount of the roller guide displacement detection means 51Y become the basic correction amounts of the coordinates XY, respectively (the displacement amount of the roller guide displacement detection means 51X minus the displacement amount of the roller guide displacement detection means 52X). The amount of correction of the coordinate XY is obtained by adding an angle component from the displacement amount), (the displacement amount of the roller guide displacement detection means 51Y−the displacement amount of the roller guide displacement detection means 52Y), and the positional relationship of the sensors, The movement amount of 53X and the Y-axis drive unit 53Y is calculated to correct the optical axis.

  According to this embodiment, optical space transmission is performed by detecting the inclination of the car and the position change of the car caused by the uneven distribution of passengers in the car and the height of the car in the hoistway. Elevator system that automatically corrects the optical axis between devices and fixes the radio transmission / reception unit of the car to the same optical axis correction means, thus reducing the work required for installation adjustment and enabling stable wireless transmission. Can provide.

(Third embodiment)
Next, an elevator system according to a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as 1st Embodiment and 2nd Embodiment, and the overlapping description is abbreviate | omitted.

  The transmission distance between the wireless transmission / reception unit 21A and the wireless transmission / reception unit 20A and the transmission distance between the wireless transmission / reception unit 21A and the wireless transmission / reception unit 20A are set to a certain range or a range below a threshold value. The range is set and stored as an adjustment parameter in a storage device 1A such as an EEPROM or a flash memory (not shown) of the elevator control unit 1.

  In the present embodiment configured as described above, when the elevation height of the car 3 falls within the preset optical axis alignment detailed areas 60A and 60B, the elevator control unit 1 uses the optical axis correction unit 53. Is transmitted to the signal conversion unit 8 as control information, and is transmitted to the signal conversion unit 11 via the wireless transmission / reception unit 20A or 20B via the wireless transmission / reception unit 21A or 21B. Notify within the detailed area range.

  At least in the range where the optical axis alignment detail areas 60A and 60B are detected, the mounting brackets 23C and 23D fixed to the mounting bracket 22 are installed and adjusted so that the optical axis correcting operation range by the optical axis correcting unit 53 is maximized. To do.

  When the displacement of the car 3 by the car displacement detecting means 50 or the roller guide displacement detecting means 51X, 51Y, 52X, 52Y exceeds the correction range by the optical axis correcting part 53, the correction value is set to the optical axis correcting part 53. The optical axis correction is performed within the correction range, and the correction request exceeding the optical axis correction range is recorded in the signal conversion unit 11 and notified to the elevator control unit 1 according to the procedure described in the second embodiment. Then, the elevator control unit 1 issues a warning or abnormality to the central monitoring panel or monitoring center (not shown) that adjustment is necessary.

  According to the present embodiment, the transmission distance between the wireless transmission / reception units is particularly short, and by setting the range in which the optical axis deviation between the wireless transmission / reception units becomes significant due to the displacement of the car position as the optical axis alignment detailed area, Since the range in which the optical axis can be corrected by the optical axis correcting means becomes clear and the necessity of installation readjustment of the wireless transmission / reception unit can be easily determined, an elevator system with good maintainability can be provided.

  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. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The figure which shows schematic structure of the elevator system concerning 1st Embodiment. The figure which shows an example of the fixing method of the radio | wireless transmission / reception part by the side of a hoistway. The figure which shows an example of the wireless transmission apparatus attachment bracket structure by the side of a hoistway. The figure which shows an example of a bracket side radio | wireless transmission apparatus attachment bracket structure. The figure which shows an example of arrangement | positioning of the optical axis correction | amendment means and car displacement detection part concerning 2nd Embodiment. The figure which shows an example of a structure of the optical axis correction | amendment part concerning 2nd Embodiment. The figure which shows an example of arrangement | positioning of the optical axis correction | amendment means and car displacement detection part concerning 2nd Embodiment. The figure which shows an example of a structure of a roller guide. The figure which shows an example of the optical axis alignment detailed area setting concerning 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Elevator control part, 2 ... Hoisting machine, 4 ... Main rope, 5 ... Weight, 6 ... Hoistway, 7A-7D ... Button, 8 ... Signal conversion part, 8 ... Signal conversion part, 9A. 9B ... Transmission cable, 10 ... Control unit, 11 ... Signal conversion unit, 12, 13 ... Roller guide, 12A-12C ... Roller, 13A-13C ... Roller, 14 ... Swing shaft, 15 ... Rotating shaft, 16 ... Lever, DESCRIPTION OF SYMBOLS 18 ... Machine room, 19A-19D ... Elevator hall, 20A ... Hoistway side upper radio | wireless transmission / reception part, 20B ... Hoistway side lower radio | wireless transmission / reception part, 21A ... Car side upper radio | wireless transmission / reception part, 21B ... Car side lower radio | wireless transmission / reception part, 22 ... Wireless transmission / reception unit mounting bracket, 30 ... Surveillance camera, 40 ... Guide rail, 41 ... Rail bracket, 51X. 51Y: Roller guide displacement detection means, 51X: Roller guide displacement detection means, 51Y: Roller guide displacement detection means, 53 ... Optical axis correction unit, 60A. 60B: Optical axis alignment detail area.

Claims (7)

An elevator system that performs wireless communication between a car control unit provided in a car that moves up and down in the hoistway and an elevator control part that controls the vertical movement of the car,
A hoistway-side upper transmitting / receiving device that performs the wireless communication using an electromagnetic wave having a wavelength shorter than that of the millimeter wave or millimeter wave provided on the hoistway,
A first car-side transmitting / receiving device that performs wireless communication with the hoistway-side upper transmitting / receiving device using millimeter waves provided on the side surface of the car, or electromagnetic waves having a wavelength shorter than millimeter waves;
Hoistway side lower transmitting / receiving device that performs the wireless communication using an electromagnetic wave having a wavelength shorter than millimeter wave or millimeter wave provided at the lower part of the hoistway,
A second car side that performs wireless communication with the lower hoistway side lower transmitting / receiving device using millimeter waves or electromagnetic waves having a wavelength shorter than millimeter waves provided on the side surface of the car alongside the first car side transmitting / receiving device. An elevator system comprising: a transmission / reception device.   The first car-side transceiver device and the second car-side transceiver device are provided side by side in a direction orthogonal to the moving direction of the car. Elevator system. A detector for detecting displacement of the car;
A correction unit that corrects optical axes of the first car-side transceiver device and the second car-side transceiver device;
The elevator system according to claim 1, further comprising: a correction amount control unit that controls a correction amount by the correction unit according to the displacement of the car detected by the detection unit. A guide rail provided in the hoistway;
A first roller provided on a side surface of the car and contacting a side surface of the guide rail facing the car by a first spring; and a second roller contacting a side surface of the guide rail facing the car by a second spring. A roller guide having two rollers,
The elevator system according to claim 3, wherein the detection unit detects a displacement amount of the car using a displacement amount of the first spring and a displacement amount of the second spring.   The correction amount control unit controls a correction amount of the correction unit when a distance between the hoistway side upper transmitting / receiving device and the first car side transmitting / receiving device is less than a predetermined value, and the hoistway side lower transmitting / receiving device The elevator system according to claim 3, wherein the correction amount of the correction unit is controlled when the distance from the second car side transmission / reception device is less than a predetermined value.   The elevator system according to claim 1, wherein the first car-side transmitting / receiving device and the second car-side transmitting / receiving device are installed in the car via a bracket. A surveillance camera having a microphone is provided in the car,
The said car control part transmits the image | video and audio | voice acquired by the said monitoring camera, the control signal of the said monitoring camera, and at least one part of the status data of the said monitoring camera to the said elevator control part, It is characterized by the above-mentioned. The elevator system according to 1.

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