JP2010168159A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevation device reducing an aerodynamic noise occurring in high-speed operation of an elevator and lengthening the life of a plasma generating device. <P>SOLUTION: The elevator device includes: a car 14 of the elevator ascending and descending in a hoistway 11; a straightening vanes 28a, 28b provided on the car 14 and straightening an air flow on the periphery of the car; the plasma generation device 1 provided on the straightening vanes 28a, 28b, and generating a sheet-like air flow along the surface of the hoistway side of the car 14 by the action of discharge plasma; a sensor 31 provided on the car 14 or the hoistway 11, and outputting distance information between the car 14 and a hoistway wall 30; and a control device 23 on-off controlling the plasma generation device 1 based on the distance information from the sensor 31 and a previously set threshold value. The control device 23 operates the plasma generation device 1 when the distance information is larger than the threshold value, and rests the plasma generation device 1 when the distance information is smaller than the threshold value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator apparatus.

  As the number of buildings rises, the speed of elevators installed in buildings is also increasing. In high-speed elevators, aerodynamic noise generated by the airflow around the car during ascent and descent is a problem (see, for example, Non-Patent Document 1). In order to reduce aerodynamic noise, an elevator apparatus is known in which an extension plate is mounted as a wind regulation cover so as to extend in the up-and-down direction at the lower part of the entrance / exit wall of the car (see, for example, Patent Document 1). In addition, in order to cope with higher speeds of elevators, there is also known a technique in which capsules on the landing side are flat and hemispherical on the other side are provided on the upper and lower sides of the car, respectively, and air conditioning plates are attached between the upper and lower capsules (for example, patent Reference 2). The technique described in Patent Document 2 is obtained by improving the tip portions of the upper and lower capsules to a steep shape. The technology that improved the capsule at the top and under the car is also applied to the world's fastest elevator, reducing noise by letting most of the air flow generated by the car traveling to the side and back of the car (non-patented). Reference 2).

  When a car travels at a high speed on a narrow hoistway, a narrow part is formed by the hall sill and the car sill for each elevator floor. Each time the car passes through this narrow space, the air flow is compressed and the flow velocity increases, generating local aerodynamic noise (buffing sound), and passengers in the car or waiting on the landing It gives an uncomfortable feeling. It has been clarified that a large noise is generated when the tip portion of the wind regulation cover attached to the lower part of the car reaches a narrow part in the hoistway (see Non-Patent Document 3). When the car passes through the narrow part, the air pressure at the lower part of the car increases, the flow velocity of the air that goes to the front of the car accelerates, and the air pressure decreases. A large pressure fluctuation is caused by a continuous increase in the air pressure due to the stagnation pressure and a pressure drop due to the accelerated flow. With respect to this aerodynamic noise, Patent Document 2 discloses that it is effective to mount a capsule. A flow of air flowing from the capsule to the front side of the car is generated, and the presence of this flow reduces the influence of the accelerated flow when the car passes through the narrow part, and aerodynamic noise is reduced.

  Conventionally, as a device for generating an air current, a device for ejecting a two-dimensional jet from a blower and a device using a synthetic jet are known. An airflow generator that generates an airflow by the action of discharge plasma has also been proposed (see Patent Documents 3 and 4). The airflow generation devices described in Patent Documents 3 and 4 can stably generate an airflow even under high temperature or in a dust-containing environment by an airflow induction phenomenon caused by discharge plasma, and can control aerodynamic characteristics. I am doing so. There has also been proposed a technique in which this airflow generation device is provided on a wing, and the air flow on the wing surface is accelerated by an induced flow along the surface of the dielectric (see, for example, Non-Patent Documents 4 to 6).

Japanese Patent No. 3100685 Japanese Patent Laid-Open No. 2005-16496 JP 2007-317656 A JP 2008-1354 A

Hisashi Matsuda, 4 others, “Study on Aerodynamic Noise of High-Speed Elevators (Effect of Apron Section on Flow Around the Car)”, Transactions of the Japan Society of Mechanical Engineers (Part B), August 1993, Volume 59, 564 No., pp. 2494-2499 Toshiaki Nakagawa, 3 others, “The world's fastest 1,010 m / min elevator”, Toshiba Review, June 2002, vol. 57, no. 6, pp. 58-63 Yoshiaki Fujita, 3 others, “Reduction of wind noise of ultra-high speed elevator”, Technical Meeting of the Japan Society of Mechanical Engineers, December 1997, No. 97-76 Motofumi Tanaka, 10 others, “Airflow control by non-equilibrium plasma (1st report) -Inhibition effect on blade surface separation by plasma-induced jet-”, The Japan Society of Mechanical Engineers 85th Fluid Engineering Division Lecture, November 2007, No . 07-16, ISSN 1348-2882, OS5-1-503 Hisashi Matsuda, 9 others, "Airflow control by non-equilibrium plasma (2nd report)-Effect of pulse modulation control", The Japan Society of Mechanical Engineers 85th Fluid Engineering Division lecture, November 2007, No. 07-16, ISSN 1348-2882, OS5-1-504 Hisashi Matsuda, 9 others, “Airflow control by non-equilibrium plasma (effect of pulse modulation control)”, Transactions of the Japan Society of Mechanical Engineers (Part B), August 2008, Vol. 74, No. 744, No. 08-7006

  However, in the technique described in Patent Document 2, a capsule is provided at the top and bottom of the car and a wind regulating plate between the capsules, a groove is formed in the wind regulating plate, and the counterweight is divided into left and right, and a groove is formed on the surface of each counterweight. It is necessary to make a structural improvement, such as forming, and it takes a cost to make this structural improvement. This improvement cannot be applied if the structural improvement is constrained by the size of the hoistway. In the current situation where the speed of elevators is increasing and comfort is increasingly required, there are cases where aerodynamic noise cannot be effectively reduced only by such structural improvements.

  Therefore, in view of the above problems, the present invention can reduce aerodynamic noise generated during high-speed operation of the elevator, and at the same time, can extend the life of the elevator apparatus including the apparatus for reducing aerodynamic noise. An object is to provide an elevator apparatus.

  In order to solve such a problem, according to one aspect of the present invention, an elevator car that moves up and down in a hoistway, a rectifying plate that is provided in the car and rectifies the airflow around the car, A plasma generator provided on the rectifying plate and generating a sheet-like airflow along the hoistway side surface of the car by the action of discharge plasma, and provided on the car or the hoistway. And a sensor that outputs distance information between the hoistway walls, and a control device that controls on / off of the plasma generator based on the distance information from the sensor and a preset threshold value. Activates the plasma generator when the distance information is greater than the threshold, and activates the plasma generator when the distance information is less than the threshold. Elevator apparatus characterized by causing drowsiness are provided.

  According to another aspect of the present invention, the elevator car that moves up and down in the hoistway, the rectifying plate that is provided in the cab and rectifies the airflow around the cab, and the rectifying plate is provided on the rectifying plate. A plasma generator for generating a sheet-like airflow along the hoistway surface of the car by the action of discharge plasma, and a height of the hoistway when the aerodynamic noise is generated while the car is running A storage unit for storing the noise generation position in the vertical direction, a car position output unit for outputting the car position information of the car, the car position information output from the car position output unit, and the storage unit A control device for controlling on / off of the plasma generation device based on the noise generation position, the control device when the car reaches the noise generation position or the noise generation position. It actuates the plasma generator before reaching, in other cases an elevator apparatus, characterized in that to sleep the plasma generator is provided.

  According to another aspect of the present invention, the elevator car that moves up and down in the hoistway, the rectifying plate that is provided in the cab and rectifies the airflow around the cab, and the rectifying plate is provided on the rectifying plate. A plasma generator for generating a sheet-like airflow along the hoistway side surface of the car by the action of discharge plasma, and a detection plate provided in the car and provided in the hoistway, A photoelectric or magnetic switch for detecting light shielding or magnetic shielding, and a control device for controlling on / off of the plasma generating device based on a detection signal from the switch, the control device comprising: Provided is an elevator apparatus characterized by operating the plasma generator when closed in response to a detection plate, and resting the plasma generator otherwise It is.

  According to another aspect of the present invention, the elevator car that moves up and down in the hoistway, the rectifying plate that is provided in the cab and rectifies the airflow around the cab, and the rectifying plate is provided on the rectifying plate. A plasma generator for generating a sheet-like airflow along the hoistway side surface of the car by the action of discharge plasma, and the position of the car in the hoistway opens and closes the door of the car Door zone detection means for detecting that the vehicle is within a possible door zone, and a control device for controlling on / off of the plasma generator based on a detection signal output from the door zone detection means. When it is confirmed that the car is located near the car stop floor, the plasma generator is operated, and otherwise the plasma generator is put to sleep. Elevator apparatus is provided, wherein the door.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to reduce the aerodynamic noise which arises at the time of a high-speed driving | running | working of an elevator, and can extend the apparatus lifetime of the elevator apparatus containing the plasma generator for reducing aerodynamic noise.

It is a figure which shows the cross-sectional structure of the airflow generation apparatus using discharge plasma. It is a figure which shows an example of the speed change of an induced flow. It is a figure which shows the cross-sectional structure of the other airflow generator using a discharge plasma. It is a figure which shows an example of the velocity change waveform of the induced flow generated by the airflow generator of FIG. It is a figure which shows another example of the velocity change waveform of the induced flow generated by the airflow generator of FIG. 1 is a configuration diagram of an elevator apparatus according to a first embodiment of the present invention. It is a figure which shows typically the state of the airflow which arises in the front-end | tip part of a baffle plate when a cage | basket | car approaches a narrow part. It is a block diagram of the elevator apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram of the elevator apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram of the elevator apparatus which concerns on the 4th Embodiment of this invention. It is a perspective view of each single body of a detection plate and a photoelectric switch. It is a block diagram of the elevator apparatus which concerns on the 5th Embodiment of this invention.

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

  In order to reduce the aerodynamic noise of the conventional elevator apparatus described above, the elevator apparatus according to the embodiment of the present invention controls the flow of air around the car by utilizing an airflow generator that is a plasma generator. . Prior to the description of the embodiment of the present invention, the airflow generation device will be described. As an airflow generation device, an airflow generation device that generates an airflow by the action of discharge plasma is used in consideration of downsizing and controllability of the device (see Patent Documents 3 and 4).

  The airflow generator includes a long dielectric, a pair of electrodes embedded in the dielectric, and arranged in parallel with the longitudinal direction of the dielectric, and a voltage applying mechanism for applying a voltage between the electrodes. With. FIG. 1 shows a cross-sectional structure when the airflow generator is cut along a plane perpendicular to the longitudinal direction of the dielectric.

  FIG. 1 is a diagram showing a cross-sectional structure of an airflow generation device using discharge plasma. The airflow generation device 1 (plasma generation device) includes a dielectric 2, a first electrode 3 embedded in a predetermined position in the depth direction from the surface of the dielectric 2, and the width direction of the electrode 3 and the dielectric 2. And a second electrode 4 embedded in the dielectric 2 at the same depth in the depth direction as the electrode 3 from the surface of the dielectric 2, and these electrodes 3. 4, two cables 5 connected to 4, and a discharge power source 6 that applies a voltage between the electrodes 3 and 4 via these cables 5. As the dielectric 2, an electrically insulating material such as glass, polyimide, or rubber is used. A common copper plate is used for the electrodes 3 and 4, and the thickness of the airflow generation device 1 itself including a dielectric is set to be several hundred μm or less.

  As a result, when a voltage is applied between the electrodes 3 and 4 from the discharge power supply 6 and the potential difference between the electrodes 3 and 4 becomes a certain threshold value or more, a discharge occurs between the electrodes 3 and 4, and the electrode 3 4, an induced flow 7 that is an air flow is generated in the vicinity of both. Specifically, when a voltage is applied between the pair of electrodes 3 and 4 via the dielectric 2, dielectric barrier discharge occurs. Discharge occurs between the electrodes 3 and 4, and discharge plasma is generated along with this discharge. Since the dielectric 2 is interposed between the electrodes 3 and 4, no arc discharge is generated, and the dielectric barrier discharge is stably maintained. The magnitude and direction of the induced flow 7 can be controlled by changing the current-voltage characteristics such as the voltage, frequency, current waveform, and duty ratio applied to the electrodes 3 and 4.

  FIG. 2 is a diagram illustrating an example of a change in velocity of the induced flow 7. By applying an alternating voltage or an alternating voltage between the electrodes 3 and 4, it is possible to continuously generate the induced current 7. In the example of FIG. 2, an induced flow toward the electrode 3 (induced flow toward the left in FIG. 1) and an induced flow toward the electrode 4 (induced flow toward the right in FIG. 1) are generated symmetrically. Yes. The induced flow velocities in the respective directions have almost equal values.

  Moreover, the airflow generation device may be configured as shown in FIG. FIG. 3 is a diagram showing a cross-sectional structure of another airflow generation device using discharge plasma. The airflow generation device 8 includes a dielectric 2, a first electrode 3 having an electrode upper surface that is flush with the surface of the dielectric 2, embedded in the dielectric 2, and the width of the electrode 3 and the dielectric 2. A second electrode 4 disposed adjacent to the direction and embedded in a predetermined position in the dielectric 2 in the depth direction from the surface of the dielectric 2, the two cables 5, and a discharge power source 6. The airflow generation device 8 is different from the airflow generation device 1 in which the upper surface of the electrode 3 is buried in the dielectric 2 in that the upper surface of the electrode 3 is exposed on the same surface as the surface of the dielectric 2.

  Thus, when the discharge power source 6 applies an AC voltage or an alternating voltage having a frequency equal to or lower than a predetermined value between the electrodes 3 and 4, an induced current 9 having a waveform shown in FIG. 4 is generated. FIG. 4 is a diagram showing an example of a speed change of the induced flow 9 generated by the airflow generation device 8, and the direction from the electrode 3 to the electrode 4 in FIG. 3 is a positive value. An induced flow from the electrode 4 side toward the electrode 3 side (induced flow toward the left side in FIG. 3) and an induced flow from the electrode 3 side toward the electrode 4 side (induced flow toward the right side in FIG. 3) are generated. . The direction in which the induced flow 9 flows along the surface of the airflow generator 8, that is, the surface of the dielectric 2 is reversed with time. The flow velocity of the induced flow 9 directed in each direction is different. The flow direction alternates with time and the waveform vibrates.

  FIG. 5 shows another example of the velocity change waveform of the induced flow 9 generated by the airflow generation device 8. When the discharge power source 6 applies the voltage applied to the airflow generator 8 after adjusting the value of the voltage, an induced current 9 having a waveform with a flow velocity as shown in FIG. 5 is generated. The average value obtained by taking the time average of the flow velocity in FIG. 5 is a positive or negative value. By changing the voltage applied to the discharge power supply 6, it is possible to cause the airflow generator 8 to generate an induced flow 9 that flows in one direction.

  By using this airflow generator 1 or 8, it is possible to switch between generating a very thin layered air flow in one direction along the surface and generating this flow in the opposite direction. It is. Therefore, in the elevator apparatus according to the embodiment of the present invention, the airflow generating device 1 or 8 that generates an airflow on the current plate or the apron is fixed, and a thin sheet is formed from the airflow generating device 1 or 8 when the car is traveling. Aerodynamic noise is reduced by controlling the flow of air around the car by generating the airflow along the surface of the current plate or apron. By operating the airflow generator 1 or 8, the elevator apparatus performs forced rectification immediately before the car passes through the narrow part of the hoistway. Hereinafter, an elevator apparatus according to an embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
FIG. 6 is a configuration diagram of the elevator apparatus according to the first embodiment of the present invention. The elevator apparatus 10 has a hoistway 11 of a building, and one end of a rope 13 hanging from the hoist 12 is connected to the car 14 and the other end is connected to a counterweight 15 in the hoistway 11. A car door 18 is provided in the car 14 corresponding to the hold door 17 that opens and closes the entrance / exit of the hall 16 on each floor. A work table 19 for an operator to enter is formed in the lower part of the car 14. The work table 19 includes a box-shaped frame 21 provided so as to protrude below the floor portion 20, and a work floor plate 22 fixed to the lower surface of the frame 21. A control device 23 is provided on the work floor plate 22. Signals are exchanged between the control device 23 and the control panel 25 via a tail cord or radio (not shown).

  The control panel 25 is an arithmetic unit that detects the car position and the lifting / lowering speed of the car 14 and issues a speed command to the drive motor of the hoisting machine 12. This arithmetic unit is composed of a CPU, a ROM, and a RAM, and the operation of the entire elevator apparatus 10 is controlled by the CPU executing a program. The control panel 25 receives a pulse signal having a pulse number proportional to the ascending / descending distance of the car 14 from a pulse generator mounted on a speed governor (not shown), and acquires the car position by counting these pulse trains. The control panel 25 obtains the raising / lowering speed of the car 14 by differentiating the pulse signal. The control panel 25 performs a call registration process and gives a drive command to the hoisting machine 12 to move the car 14 up and down on the registered floor.

  A hall sill 26, which is a landing threshold that protrudes toward the hoistway 11, is provided at the entrance / exit of the hall 16 on each floor. A car sill 27 is provided at the front end of the floor 20 of the car 14. A rectifying plate 28a is suspended from the front end of the threshold receiving. The rectifying plate 28a is a rectifying plate or an apron rectifying plate. A rectifying plate 28 b is provided on the upper portion of the car 14. A narrow portion 29 is formed by the hall sill 26 and the car sill 27 when the car 14 passes through each floor.

  Moreover, the airflow generator 1 is attached to the surface of the rectifying plates 28a and 28b on the landing hall 16 side. Each airflow generation device 1 is a plasma airflow generation device, which has an electrode configuration as shown in FIG. 1 and has a module structure based on an insulator such as ceramic. This insulator is fixed to the rectifying plates 28a and 28b with screws or an adhesive. Each of the pair of electrodes 3 and 4 (FIG. 1) of each airflow generation device 1 is an elongated plate-like plate electrode. Each airflow generation device 1 is fixed to the rectifying plates 28a and 28b so that the longitudinal direction of the airflow generation device 1 and the extending direction of the car sill 27 are parallel to each other. Each airflow generator 1 is fixed to the plate surfaces of the rectifying plates 28a and 28b so that the upper surface 1a of FIG. 1 faces the landing hall 16 of FIG. The electric power supplied to the car 14 is distributed by the car 14, and the distributed electric power is used as a high voltage power source corresponding to the discharge power source 6. The controller 23 applies the voltage from the high voltage power source to the two electrodes 3 and 4 of each airflow generator 1 while changing the direction and magnitude of the voltage.

  These airflow generators 1 are installed in parallel with each other on the surfaces of the rectifying plates 28a and 28b. The control device 23 applies a voltage to each of the pair of upper and lower airflow generation devices 1 of the car 14 so as to generate a thin sheet-like airflow in different directions. By the voltage control by the control device 23, the airflow generation device 1 installed on the upper rectifying plate 28b generates an airflow toward the lower side of the hoistway 11 along the surface of the rectifying plate 28b. The airflow generation device 1 installed on the lower rectifying plate 28 a generates an airflow along the surface of the rectifying plate 28 a toward the upper side of the hoistway 11. The airflow from the airflow generation device 1 flows out on the surface of the plate surface at a constant speed, unlike the wind generated by a forced ventilation type device such as a fan. In addition, when the car 14 is raised, the control device 23 operates the upper airflow generation device 1 to generate an airflow downward thereto, and stops the lower airflow generation device 1. Further, when the car 14 is lowered, the control device 23 stops the upper airflow generation device 1 and operates the lower airflow generation device 1 to generate an airflow upward.

  The inner wall of the hoistway 11 is composed of four surfaces: a rear wall surface 30 located in the car room depth direction, a front wall surface on the landing hall 16 side, and a pair of side wall surfaces located in the hoistway width direction. A laser rangefinder 31 (sensor) for measuring the distance from the car 14 to the rear wall 30 is attached to the frame 21 below the car 14 on the rear wall 30 side. The laser rangefinder 31 is a sensor that outputs distance information between the car 14 and the rear wall surface 30 of the hoistway 111. For example, a laser range finder is used. The laser distance meter 31 includes a semiconductor laser that emits a pulse laser, a laser beam scanning unit that irradiates the target region while changing the scanning speed and range of the pulse laser, and a reflection surface of the pulse laser reflected by the object. An imaging unit that captures the state, an image storage unit that stores the captured laser beam reflection image, and a distance that calculates the distance from the semiconductor laser to the laser beam reflection position by reading the laser beam reflection image and performing image processing And a calculation unit. The laser distance meter 31 outputs distance information to the control device 23.

  The control device 23 controls the driving of each airflow generation device 1 based on the distance information from the laser rangefinder 31 and a preset distance threshold, and includes a CPU, a ROM, and a RAM. The ROM stores a threshold value of the distance between the car 14 and the rear wall surface 30. This threshold value is a preset value. In the elevator apparatus 10 according to the present embodiment, the laser distance meter 31 always measures the distance, and the control device 23 has the output signal from the laser distance meter 31 equal to or less than a predetermined threshold value. When the airflow generator 1 is activated and the output signal exceeds this threshold, the airflow generator 1 is put to sleep. A protrusion 30 a such as a beam protrudes from the rear wall surface 30. The laser rangefinder 31 moves up and down as the car 14 moves up and down with the sensitivity directed toward the rear wall 30. The laser range finder 31 outputs different measurement distances depending on whether the protrusion 30a is present in the detectable region and whether the flat portion of the rear wall surface 30 is present in the detectable region.

  When the car 14 is lowered, the control device 23 performs a forced rectification by operating the lower airflow generation device 1 when the laser distance meter 31 reacts, that is, detects the protrusion 30a that is the overhanging portion. . A thin sheet-like airflow is generated upward along the surface of the current plate 28a. When the car 14 is raised, the control device 23 operates the upper airflow generation device 1 when the laser distance meter 31 detects the protrusion 30a. An air flow is generated downward along the surface of the current plate 28b.

  The time during which each airflow generator 1 is kept on is the traveling speed of the car 14, the vertical length of the frame 21, the size of the car 14, the distance between floors, or the distance to the frame 21 of the laser rangefinder 31. It is set according to the mounting position. For example, when the laser distance meter 31 is provided at the lowermost end of the frame 21, when the car 14 is lowered, the control device 23 is forced immediately after the detection signal is received from the laser distance meter 31 and before the narrow portion 29 is formed. Rectification is performed.

  In addition, although the two airflow generation apparatuses 1 are used in the example of FIG. 6, you may attach the airflow generation apparatus 8 (FIG. 3) to the baffle plates 28a and 28b. Each airflow generation device 8 is fixed to the surface of the rectifying plates 28a, 28b on the landing hole 16 side so that the upper surface 8a of FIG. 3 faces the landing hole 16 of FIG. The control device 23 can control each airflow generation device 8 similarly to the example of the airflow generation device 1.

  In the elevator apparatus 10 according to the present embodiment having such a configuration, the control panel 25 always detects the position of the car 14 and notifies the control apparatus 23 of the car position information. When the car 14 is lowered, in FIG. 6, the car 14 approaches the protrusion 30a from above the height position of any of the protrusions 30a. The control device 23 continues to compare the output signal from the laser distance meter 31 with a threshold value stored in advance. When the control device 23 determines that the sensor value from the laser rangefinder 31 has become smaller than this threshold value, it detects that the car 14 has reached the narrow portion 29, and the air flow generator 1 of the rectifying plate 28a A voltage is applied so as to generate an induced flow upward. The control device 23 turns off the airflow generation device 1 of the other rectifying plate 28b.

  FIG. 7 is a diagram schematically showing the state of airflow generated at the tip of the rectifying plate 28a when the car 14 reaches the narrow portion 29. FIG. FIG. 7A shows a state when the airflow generation device 1 is on. FIG. 2B shows the state of the airflow when the airflow generator 1 is off as a reference example. Elements having the same reference numerals as those described above in FIGS. 7A and 7B represent the same elements.

  When the control device 23 turns on the airflow generation device 1, an airflow is generated in the direction opposite to the moving direction of the car 14 from the airflow generation device 1, as shown in FIG. Since plasma discharge occurs, air cannot be blocked at the tip of the rectifying plate 28a (left tip in the figure), and the flow of air that peels from the tip and flows into the front of the car diffuses around the car. The amount of air flow from the front end portion to the front surface of the car door 18 is reduced, and a local accelerated flow is not generated. Thereby, the pressure fluctuation of air is relieved and consequently aerodynamic noise can be suppressed. If the control device 23 does not turn on the airflow generator 1 when the tip of the current plate 28a approaches the narrow portion 29 when the car 14 is lowered, the current plate is shown in FIG. The air dammed up at the tip of 28 a is separated and flows into the front of the car 14, and a local accelerated flow is generated in front of the car door 18. In this case, a large pressure fluctuation of air is caused by the accelerated flow, and as a result, aerodynamic noise is generated.

  Returning to FIG. 6, the car 14 continues to descend further. The control device 23 continues to monitor the distance from the protrusion 30a. When the control device 23 in the state of detecting the protruding object 30a determines that the sensor value from the laser distance meter 31 has become larger than the threshold value, it is determined that the car position has passed the height position of the protruding object 30a. The voltage application to the airflow generator 1 on the side is stopped. When the car 14 approaches the floor and passes through the floor even when the vehicle descends thereafter, the control device 23 operates and stops the airflow generation device 1, respectively.

  When the car 14 is to be lifted, the controller 23 controls the airflow generator 1 on the rectifying plate 28b so as to generate a downward airflow. When the car rises, the control device 23 turns off the airflow generation device 1 of the rectifying plate 28a. The car 14 approaches the height position of this protrusion 30a from below the height position of any protrusion 30a. When the sensor value from the laser rangefinder 31 becomes smaller than the threshold value, the control device 23 applies a voltage to the upper airflow generation device 1 so as to generate an induced flow downward. When the control device 23 turns on the airflow generation device 1, the airflow generation device 1 causes the induced flow to flow downward in the direction opposite to the rise of the car 14. The air flow that separates from the upper part of the car 14 and flows into the front of the car diffuses around the car, and the amount of air flowing from the upper part toward the front of the car door 18 is reduced. Thereby, the pressure fluctuation of air is relieved and consequently aerodynamic noise can be suppressed. Subsequently, when the sensor value becomes larger than the threshold value, the control device 23 determines that the car position has passed the height position of the protrusion 30a, and stops the application of voltage to the upper airflow generation device 1. In the subsequent ascent, the control device 23 operates and stops the airflow generation device 1 when the car 14 approaches the floor and passes through the floor.

  Therefore, in each of the downward and upward directions of the car 14, the air pressure fluctuation can be reliably mitigated by the action of the plasma air flow, and aerodynamic noise can be reduced. In this elevator apparatus, the plasma discharge is turned on and off only when the car 14 approaches and passes through the narrow object 29, which contributes to energy saving. The plasma-induced flow is generated by consuming several watts of electric power, and it is easy to cover the electric power for driving each airflow generator 1 from the electric power supplied to the car 14. Since the airflow generation device 1 itself is also small, the operation of installing these airflow generation devices 1 on the car 14 can be easily performed.

  The two airflow generation devices 1 have a short life when used in a state where voltage is continuously applied. In this elevator apparatus 10, since each airflow generation device 1 is operated by being turned on or off in small increments, the life of each airflow generation device 1 can be extended.

  In this way, only when the car 14 and the rear wall surface 30 approach each other, one of the airflow generation devices 1 is turned on to generate an induced flow, and the height position where the distance between the car 14 and the rear wall surface 30 is wide. In the hoistway 11, since the other airflow generation device 1 is turned off, no voltage is applied to any of the airflow generation devices 1 when an operation for generating plasma discharge is unnecessary. Therefore, it is possible to extend the life of each airflow generation device 1.

  Even when the two airflow generation devices 8 are respectively installed above and below the car 14, the same effect as that obtained when the two airflow generation devices 1 are provided can be obtained.

(First modification of the first embodiment)
In the example of the first embodiment, the number of the airflow generation devices 1 is two. However, the elevator apparatus according to the first modification of the first embodiment of the present invention includes the airflow generation device 1 as a car. You may attach and comprise only to one of the upper and lower sides of 14. For example, the airflow generator 1 is attached only to the rectifying plate 28a below the car 14, and the controller 23 controls the voltage applied to the airflow generator 1 to drive the airflow in the opposite direction. .

  With such a configuration, the control device 23 generates the downward induced flow 7 in the airflow generation device 1 of the lower rectifying plate 28a when the car 14 is raised. The control device 23 causes the airflow generation device 1 to generate the upward induced flow 7 when the car 14 is lowered. Even in this case, the same effect as that obtained in the example of the first embodiment can be obtained.

  Further, the rectifying plate 28b may be provided on the upper portion of the car 14 without providing the rectifying plate 28a on the lower portion of the car 14, and one airflow generator 1 may be attached to the rectifying plate 28b. The control device 23 causes the airflow generator 1 to generate the airflow in the opposite direction. Instead of the airflow generation device 1, an airflow generation device 8 may be used.

(Second modification of the first embodiment)
Moreover, in the said 1st Embodiment and 1st modification, although the airflow generation apparatuses 1 and 8 were attached to any one or both of the baffle plates 28a and 28b, respectively, the car roof upper part and the car floor lower part are respectively. When a high-speed traveling car with a windbreak cover for reducing air resistance is used, the two airflow generation devices 1 or the two airflow generation devices 8 can be mounted on the upper and lower windbreak covers. The wind regulation covers attached to the upper and lower sides cover the upper end portion and the lower end portion of the car 14. The wind regulation cover has a surface facing the landing hall 16 side of the hoistway 11 and a surface facing the rear wall surface 30 side. Preferably, the surface facing the landing hall 16 side is flat and faces the rear wall surface 30 side. The surface is hemispherical or inclined. The airflow generation device 1 may be attached to only the upper windbreak cover, only the lower windbreak cover, or both the upper windbreak cover and the lower windbreak cover.

(Third Modification of First Embodiment)
Although the laser rangefinder 31 is attached to the back plate side of the car 14, the car range 14 may be detected by fixing the laser rangefinder 31 to the rear wall 30 near each floor. Laser distance meters 31 are respectively attached to a plurality of locations in the height direction of the rear wall surface 30. Each laser distance meter 31 is installed so that the output of these laser distance meters 31 is concentrated to the control panel 25 via a cable. The ROM of the control panel 25 stores a threshold value for the distance between the car 14 and the rear wall surface 30. With such a configuration, the control panel 25 continues to monitor the output of each sensor, and operates the airflow generator 1 only when the output signal of any sensor falls below a predetermined threshold value. Generate airflow. Otherwise, the control panel 24 causes the airflow generation device 1 to sleep. Even in this case, the life of the airflow generation device 1 can be extended.

(Second Embodiment)
FIG. 8 is a configuration diagram of an elevator apparatus according to the second embodiment of the present invention. In the figure, elements having the same reference numerals as those described above represent the same elements. The elevator apparatus 10 </ b> A according to the present embodiment includes a passenger car 14, a rope 13, a counterweight 15, a hoisting machine 12, an emergency stop mechanism 32, and a control panel 25.

  The emergency stop mechanism 32 includes a governor 33 incorporating a governor sheave as a driven sheave, a tension sheave 34 with a weight disposed below the hoistway 11, and an endless stretched over the governor sheave and the tension sheave 34. And a safety member (not shown) provided on the car 14, and a connecting member 36 for fixing the governor rope 35 to the car 14. When the control panel 25 rotationally drives the hoisting machine 12 to move the car 14 up and down, the governor rope 35 moves and the governor sheave of the governor 33 rotates. The governor 33 detects the moving speed of the car 14 using the rotational speed of the driven sheave. When the moving speed of the car 14 exceeds a preliminarily stored limit speed, the governor 33 holds the governor rope 35 and applies braking to the movement of the governor rope 35 to thereby improve the safety of the car 14. Is ensured.

  Between the governor sheave and the tension sheave 34, the governor rope 35 is either an outward path or a return path, and is two governor ropes parallel in the vertical direction. An emergency stop device provided on the car 14 is connected to one of the two governor ropes 35 via a connecting member 36.

  The control panel 25 calculates the car position by counting the number of pulses of the pulse signal from the pulse generator attached to the speed governor 33. The control panel 25 and the speed governor 33 cooperate to implement a function as car position output means for outputting the car position. The car position output means notifies the control device 23 of the car position in the height direction in the hoistway 11 of the car 14 based on the position of the connecting member 36.

  Moreover, the airflow generator 1 is attached to each of the rectifying plates 28a and 28b, and the control device 23 controls these airflow generators 1. The ROM of the control device 23 stores position information in the hoistway 11 where noise is generated in the car room in the height direction. The position in the hoistway 11 is the height of the narrow portion 29 and the protrusion 30a. The control device 23 is constantly notified of the current position of the car 14 from the control panel 25. The control device 23 compares the current position information of the car 14 with the position information of the noise occurrence location stored in the ROM, and determines whether the car 14 has approached the noise occurrence location. The control device 23 operates the airflow generation device 1 when the height position of the car 14 is a noise generation place or immediately before the noise generation place. When the control device 23 determines that the height position of the car 14 is not a noise generation place, the two air flow generation devices 1 are put to sleep.

  When the elevator apparatus 10 </ b> A according to the present embodiment configured as described above operates to lower the car 14, the control device 23 determines whether or not the current position of the car 14 has approached the position of the noise generation location stored in advance. The judgment process is always executed. When the control device 23 determines that the car 14 has approached the noise generation location, the control device 23 turns on the airflow generation device 1 of the rectifying plate 28a and causes the airflow generation device 1 to generate an upward induced flow. The control device 23 stops the airflow generation device 1 of the rectifying plate 28b. The amount of air flowing away from the upper part of the car 14 toward the front of the car door 18 is reduced, and aerodynamic noise is suppressed. When the control device 23 determines that the car 14 is away from the noise generation location, the control device 23 turns off the airflow generation device 1 of the rectifying plate 28a. Even when the car is lowered thereafter, the control device 23 operates and stops the airflow generation device 1 when the car 14 approaches the narrow portion 29 and leaves the narrow portion 29, respectively. When the car 14 performs the ascending operation, the control device 23 performs on / off control of the airflow generation device 1 fixed to the rectifying plate 28b. In this case, the drive control method of the airflow generator 1 of the rectifying plate 28b is the same as the example in the case where the car 14 is operated to descend. Further, instead of the airflow generation device 1, the airflow generation device 8 may be installed on the rectifying plates 28a and 28b.

  According to the elevator apparatus according to this embodiment of the present invention, the two airflow generation apparatuses 1 can be operated without performing the process of monitoring the output of the laser generation apparatus 31. Since the on / off timing of the operation of the airflow generation device 1 can be controlled based on the contents of the ROM written in advance, the information in the ROM can be easily changed according to the shape of the building. Even in this elevator apparatus, when the operation for generating the plasma discharge is not necessary, no voltage is applied to the airflow generation apparatus 1, so that the life of the airflow generation apparatus 1 can be extended.

(Third embodiment)
FIG. 9 is a configuration diagram of an elevator apparatus according to the third embodiment of the present invention. In the figure, elements having the same reference numerals as those described above represent the same elements. The elevator apparatus 10 </ b> B according to the present embodiment is provided with a proximity sensor 37 at the front end of the car sill 27 whose sensitivity is directed toward the hoistway front wall surface. The proximity sensor 37 is set with a detectable distance in advance, and outputs a signal indicating that the detected object has been detected when the detected object falls within the detectable distance. As the proximity sensor 37, a magnetic sensor or an ultrasonic sensor is used. The proximity sensor 37 is also a sensor that outputs distance information between the car 14 and the hoistway wall.

  The magnetic sensor is a sensor that outputs a detection signal when it detects that the magnetism is shielded, and has a gap as a part of the magnetic circuit. When a magnetic sensor is used, metal plates are installed at a plurality of locations on the front wall surface. When these metal plates are sandwiched between the gaps of the magnetic sensor attached to the car 14, the magnetism of the magnetic circuit of the magnetic sensor is shielded. The proximity sensor 37 operates by detecting this magnetic shielding.

  The ultrasonic sensor includes an ultrasonic wave transmitting unit that transmits ultrasonic waves and an ultrasonic wave receiving unit that receives ultrasonic waves. When an ultrasonic sensor is used, sound absorbing materials are installed at a plurality of locations on the front wall surface. The ultrasonic sensor attached to the car 14 continues to transmit and receive ultrasonic waves. When the ultrasonic wave from the ultrasonic sensor is absorbed by the sound absorbing material as the car 14 moves up and down, the ultrasonic receiving unit on the sensor side detects that the ultrasonic wave is shielded, and the detection signal Is output. In response to this detection signal, the control device 23 performs the switching operation of the airflow generation device 1.

  Alternatively, the ultrasonic sensor includes an ultrasonic wave transmitting unit that transmits an ultrasonic wave polarized in the first polarization direction, a polarization unit that transmits the ultrasonic wave only in the second polarization direction, and the first And an ultrasonic wave receiving unit that receives an ultrasonic wave having the polarization component. A plurality of polarizing means are attached to the front wall surface, these polarizing means output polarized ultrasonic waves, and the ultrasonic receiving unit receives reflected or transmitted ultrasonic waves. In this case, when the ultrasonic wave is polarized by the polarizing means, the ultrasonic wave receiving unit capable of receiving only the first polarization component detects that the ultrasonic wave is shielded and outputs a detection signal. In response to this detection signal, the control device 23 switches the airflow generation device 1.

  When the elevator apparatus 10 </ b> B according to the present embodiment configured as described above operates to lower the car 14, the control apparatus 23 monitors the output of the proximity sensor 37. For the proximity sensor 37, for example, a detectable distance of 50 mm is preset. The proximity sensor 37 detects the hall sill 26 when the lower end of the car 14 passes near the landing hall 16. When the detection signal from the proximity sensor 37 is detected, the control device 23 turns on the air flow generation device 1 of the rectifying plate 28a and causes the air flow generation device 1 to generate an upward induced flow. The airflow generator 1 of the rectifying plate 28b is stopped. The amount of air flow toward the front surface of the car door 18 is reduced, and aerodynamic noise is suppressed. By making the position of the proximity sensor 37 the lower end of the rectifying plate 28a, the detection timing can be advanced. Even during the subsequent descent, the control device 23 operates and stops the airflow generation device 1 of the rectifying plate 28a when passing near each floor.

  Further, the drive control method of the airflow generator 1 of the rectifying plate 28b by the control device 23 when the car 14 is in the ascending operation is a control example of the airflow generator 1 of the rectifying plate 28a when the car 14 is in the descending operation. The same. Further, instead of the two airflow generation devices 1, two airflow generation devices 8 may be installed in the car 14.

  According to the elevator apparatus according to this embodiment of the present invention, it is possible to detect all objects within a predetermined distance range simply by determining a predetermined distance value and storing the value in the control device 23.

(Fourth embodiment)
FIG. 10 is a configuration diagram of an elevator apparatus according to the fourth embodiment of the present invention. In the figure, elements having the same reference numerals as those described above represent the same elements. In the elevator apparatus 10 </ b> C according to the present embodiment, a plurality of thin detection plates 39 are provided on the left side wall surface 38 from the landing hall 16 toward the car door 18 so as to stand upright from the side wall surface 38. . A photoelectric switch 40 is provided on the roof of the car 14. The photoelectric switch 40 has a light source and a light receiving element facing the light source on the optical path of light from the light source, and detects that the detection plate 39 blocks the light. The control device 23 operates the airflow generation devices 1 provided on the rectifying plates 28a and 28b based on the on output or the off output from the photoelectric switch 40, respectively.

  FIG. 11 is a perspective view of each of the detection plate 39 and the photoelectric switch 40. One long side portion of the detection plate 39 is attached to the side wall surface 38 via the attachment portion 41, and the outline of the other long side portion of the detection plate 39 extends in the vertical line direction. The photoelectric switch 40 includes a frame body 44 having a pair of end faces 42 and 43 facing each other through a gap, a light source portion 45 provided on the end face 42, and an end face of a portion serving as a light receiving region of light from the light source portion 45. The light receiving unit 46 provided in 43 and an electric circuit (not shown) that outputs a signal to the control device 23 when it is detected that the light receiving unit 45 is shielded from light. The photoelectric switch 40 is operated by the detection plate 39 blocking the optical path as a light shielding plate.

  Further, the height position of the detection plate 39 in the hoistway 11 is determined based on the height position of the photoelectric switch 40 on the car roof at the car position where the narrow portion 29 is formed. As an example, the upper end of the detection plate 39 is determined to be the height of the photoelectric switch 40 when the car position is the highest position in the aerodynamic noise generation range of each floor, or a slightly higher position. The lower end of the detection plate 39 is determined to be the height of the photoelectric switch 40 when the car position is the lowest position within the same range of each floor, or a position slightly lower than that. The heights of a plurality of other detection plates 39 not shown in FIG. 11 are also determined according to the height position of the photoelectric switch 40 when the narrowed portion 29 is formed.

  Thus, the photoelectric switch 40 continues to output a receiving signal while receiving the projected light. When the photoelectric switch 40 detects that the optical path is blocked by the detection plate 39, it senses the object and sends a detection signal to the control device 23. When the control device 23 receives the detection signal, one of the airflow generation devices 1 is operated.

  When the elevator apparatus 10 </ b> C according to the present embodiment configured as described above descends, in FIG. 10, immediately after passing the lower end of the upper detection plate 39 among the two detection plates 39 on the upper and lower floors, The light receiving unit 46 starts to receive light from the light source unit 45 opposed thereto. The control device 23 turns off the airflow generation device 1 of the rectifying plate 28a. When the car 14 descends from this state, the photoelectric switch 40 on the car 14 is applied to the upper end of the lower detection plate 39, and the detection plate 39 is a U-shaped frame body 44 in plan view of the photoelectric switch 40. It is sandwiched between the gaps. The photoelectric switch 40 is shielded from light and performs a detection operation, and the control device 23 turns on the airflow generation device 1 of the rectifying plate 28a and causes the airflow generation device 1 to generate an upward induced flow. The amount of air flow toward the front surface of the car door 18 is reduced, and aerodynamic noise is suppressed. While the lower detection plate 39 is sandwiched between the photoelectric switches 40, the airflow generation device 1 is kept on. When the car 14 further descends from this state, the photoelectric switch 40 passes through the lower end of the detection plate 39, the light receiving unit 46 begins to resume light reception, and the photoelectric switch 40 is again receiving light. The control device 23 turns off the airflow generation device 1 of the rectifying plate 28a. The control device 23 operates in the same manner during the descending operation of the car 14 thereafter.

  Moreover, when this elevator apparatus 10C carries out a driving | running operation, the control apparatus 23 carries out on-off control of the airflow generation apparatus 1 of the baffle plate 28b. When the car 14 is raised, immediately after the photoelectric switch 40 passes through the upper end of the lower detection plate 39 among the upper and lower detection plates 39, the state of the photoelectric switch 40 is a light receiving state. When the car 14 rises from this state, the photoelectric switch 40 is shielded from light by being applied to the lower end of the upper detection plate 39 and performs a detection operation. The control device 23 turns on the airflow generation device 1 of the rectifying plate 28b, and the airflow generation device 1 generates a downward airflow. While the upper detection plate 39 is sandwiched between the photoelectric switches 40, the airflow generator 1 is kept on. When the car 14 further rises from this state, the photoelectric switch 40 passes through the upper end of the detection plate 39, and the photoelectric switch 40 is again receiving light. The control device 23 turns off the airflow generation device 1 of the upper rectifying plate 28b.

  Therefore, when it is determined that the position in the height direction of the car 14 is other than the place where the noise is generated, the control device 23 can switch the airflow generation devices 1 to sleep. Instead of the airflow generation device 1, an airflow generation device 8 may be used.

(Modification of the fourth embodiment)
In addition, the elevator apparatus according to the modification of the fourth embodiment of the present invention may use a reflective photoelectric switch instead of the photoelectric switch 40. In the reflection type photoelectric switch, one end face 42 of the end faces 42 and 43 is provided with both a light source unit 45 and a light receiving unit 46 that receives reflected light of the light from the light source unit 45. .

  Moreover, the elevator apparatus which concerns on this modification may use an infrared switch, and the control apparatus 23 may detect shielding of infrared rays, and may carry out on-off control of the airflow generation apparatus 1 of an upper side lower side.

  Moreover, the elevator apparatus which concerns on this modification can also use a magnetic switch. The magnetic switch detects that the magnetism is shielded or the magnetic flux changes. The magnetic switch detects the fact that a detection plate such as a metal plate cuts off the magnetic field in the magnetic circuit and outputs an ON signal, according to the ON output or OFF output of this magnetic sensor. And a circuit switch unit that performs switching. As an example, a magnetic switch includes a support, a magnet plate with a contact that is swingably attached to the support, one end fixed to the support, and the other end locked to the magnet plate. A spring that biases the force that pulls the plate to the support, a terminal that is provided on the support and has separate contacts, and an electric circuit that is connected to these contacts, and the detection plate is a magnetic plate with contacts When approaching, the magnet plate is tilted by the magnetic attractive force, and the two contacts are brought into contact with the tilting so that the switch is closed.

  The elevator apparatus according to this modification can be switched to operate or stop each airflow generation device 1 by turning on / off the control device 23 by using any one of these switches.

(Fifth embodiment)
FIG. 12 is a configuration diagram of an elevator apparatus according to the fifth embodiment of the present invention. In the figure, elements having the same reference numerals as those described above represent the same elements. The elevator apparatus 10D according to the present embodiment uses a door zone detection function that detects a door zone that represents a height range that is determined in advance to allow the car door 18 to be opened and closed. The function of the door zone detecting means is realized by a pulse generator mounted on the speed governor, a CPU, a ROM, and a RAM of the control panel 25. In general, elevators are rescued to the nearest floor with battery power in the event of a power failure and prevent passengers from being trapped in the car 14, and are a plus or minus several hundred millimeters from the landing level. The door zone is determined within the range.

  On the front wall surface 47 where the car door 18 of the hoistway 11 faces is provided with a plurality of landing detection plates 48 for detecting the position of the car 14 for each floor. A landing sensor 49 is attached to the roof of the car 14. The landing detection plate 48 is made of a steel material, and the landing sensor 49 is a magnetic sensor. The height of the landing sensor 49 is determined in consideration of the height difference between the hall sill 26 and the car sill 27. As another aspect of the detection method, an optical sensor that irradiates the landing detection plate 48 with light and receives reflected light may be used. The control device 23 is configured to receive an on signal or an off signal from the landing sensor 49.

  In the elevator apparatus according to the present embodiment, the airflow generating device 1 is provided with a rectifying plate 28a at the lower part of the car 14, and one airflow generating device 1 is attached to the rectifying plate 28a. The control device 23 causes the airflow generation device 1 to change the direction of airflow generation in the opposite direction.

  When the elevator apparatus 10 </ b> D according to the present embodiment configured as described above descends, the landing sensor 39 immediately after passing through the lower end of the upper landing detection plate 48 among the two upper and lower landing detection plates 48. The state is an off state. The control device 23 stops the airflow generation device 1. When the car 14 descends from this state, the landing sensor 39 is applied to the upper end of the lower landing detection plate 48 and the landing detection plate 48 enters the detectable range of the landing sensor 39. The landing sensor 39 is turned on, and the control device 23 turns on the airflow generation device 1 to reduce the amount of air flow toward the front surface of the car door 18 and suppress aerodynamic noise. While the landing detection plate 48 is detected by the landing sensor 39, the airflow generation device 1 is kept on. When the car 14 further descends from this state, the landing sensor 39 passes the lower end of the landing detection plate 48, and the landing sensor 39 is turned off again. The control device 23 turns off the airflow generation device 1. The control device 23 operates in the same manner during the descending operation of the car 14 thereafter.

  Further, the case where the elevator apparatus 10D performs the ascending operation is the same as the example of the descending operation. Thereby, the control apparatus 23 can switch so that the airflow generation apparatus 1 may be made to sleep when it judges that the height direction position of the passenger car 14 is other than a noise generation place.

  According to the elevator apparatus 10D according to this embodiment of the present invention, the operation and stop of the airflow generation apparatus 1 can be switched using an existing landing detection function, and a new switch is connected to the hoistway 11 or the car. 14 is provided, the same effect as in the first embodiment can be obtained.

(Description of other embodiments)
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. The mounting position of the airflow generation device 1 can be variously changed.

  Further, in the above embodiment, the function of the rectifying plate 28a can be realized even if the apron plate and the rectifying plate are separately configured, and the airflow generator 1 is either the apron plate or the rectifying plate. You may attach to either or both.

  The shape of the pair of electrodes 3 and 4 shown in FIGS. 1 and 3 may be a bar shape such as a circle or a rectangle in cross section. These electrodes 3 and 4 may have the same shape or different shapes. In the above embodiment, the control device 23 and the like of the car 14 control the airflow generation device 1, but the control panel 25 may perform this control.

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

  DESCRIPTION OF SYMBOLS 1,8 ... Airflow generator (plasma generator), 1a, 8a ... Upper surface, 2 ... Dielectric, 3,4 ... Electrode, 5 ... Cable, 6 ... Power supply for discharge, 7, 9 ... Induced flow (airflow), DESCRIPTION OF SYMBOLS 10,10A, 10B, 10C, 10D ... Elevator device, 11 ... Hoistway, 12 ... Hoisting machine, 13 ... Rope, 14 ... Riding car, 15 ... Counterweight, 16 ... Landing hall, 17 ... Hold door, 18 ... Car door, 19 ... Work table, 20 ... Floor, 21 ... Frame, 22 ... Work floor, 23 ... Control device, 25 ... Control panel, 26 ... Hall sill, 27 ... Cable sill, 28a, 28b ... Rectifying plate, 29 ... Narrow part, 30 ... Rear wall surface (hoistway wall), 30a ... Projection, 31 ... Laser distance meter (sensor), 32 ... Emergency stop mechanism, 33 ... Speed governor (cage position output means), 34 ... Tension sheave 35 ... Governor rope, 3 DESCRIPTION OF SYMBOLS ... Connecting member, 37 ... Proximity sensor, 38 ... Side wall surface, 39 ... Detection plate, 40 ... Photoelectric switch, 41 ... Mounting part, 42, 43 ... End face, 44 ... Frame body, 45 ... Light source part, 46 ... Light receiving part, 47 ... Front wall surface, 48 ... Landing detection plate, 49 ... Landing sensor.

Claims (5)

The elevator car that goes up and down in the hoistway,
A rectifying plate provided in the car for rectifying the airflow around the car;
A plasma generator that is provided on the current plate and generates a sheet-like airflow along the hoistway surface of the car by the action of discharge plasma;
A sensor that is provided in the car or the hoistway, and outputs distance information between the car and the hoistway wall;
A controller for controlling on / off of the plasma generator based on the distance information from the sensor and a preset threshold value,
The control device operates the plasma generator when the distance information is larger than the threshold, and causes the plasma generator to sleep when the distance information is smaller than the threshold. The elevator car that goes up and down in the hoistway,
A rectifying plate provided in the car for rectifying the airflow around the car;
A plasma generator that is provided on the current plate and generates a sheet-like airflow along the hoistway surface of the car by the action of discharge plasma;
A storage unit for storing a noise generation position in a height direction of the hoistway when aerodynamic noise is generated while the car is traveling;
Car position output means for outputting car position information of the car;
A controller for controlling on / off of the plasma generator based on the car position information output from the car position output means and the noise generation position stored in the storage unit,
The control device operates the plasma generator when the car reaches the noise generation position or before reaching the noise generation position, and otherwise causes the plasma generation apparatus to sleep. Elevator device. The sensor is a proximity sensor whose sensitivity is directed to the hoistway wall;
2. The elevator apparatus according to claim 1, wherein when the proximity sensor detects the hoistway wall, the controller activates the plasma generator, and otherwise causes the plasma generator to sleep. 3. The elevator car that goes up and down in the hoistway,
A rectifying plate provided in the car for rectifying the airflow around the car;
A plasma generator that is provided on the current plate and generates a sheet-like airflow along the hoistway surface of the car by the action of discharge plasma;
A photoelectric or magnetic switch that detects light shielding or magnetic shielding by a detection plate provided in the car and provided in the hoistway;
A control device for controlling on / off of the plasma generator based on a detection signal from the switch,
The control device operates the plasma generator when the switch is closed in response to the plate to be detected, and rests the plasma generator otherwise. The elevator car that goes up and down in the hoistway,
A rectifying plate provided in the car for rectifying the airflow around the car;
A plasma generator that is provided on the current plate and generates a sheet-like airflow along the hoistway surface of the car by the action of discharge plasma;
Door zone detecting means for detecting that the position of the car in the hoistway is within a door zone capable of opening and closing the door of the car;
A control device for controlling on / off of the plasma generator based on a detection signal output from the door zone detector;
The control device operates the plasma generator when it is confirmed that the car is located in the vicinity of a car stop floor, and rests the plasma generator otherwise.

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