JP5014788B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus having a scale device for detecting a load in a car.

  In the conventional elevator apparatus, a plurality of scale devices are installed between the lower part of the car and the car frame. And the presence or absence of abnormality of a scale apparatus is determined by comparing the signal from a scale apparatus with a monitoring apparatus. When an abnormality of the scale device is detected, an abnormality report is made by the reporting unit (see, for example, Patent Document 1).

JP-A-6-234476

  Since the conventional elevator apparatus as described above uses a plurality of scale devices, the cost increases. In addition, since the detection points are dispersed, the detection value varies depending on the position of the passenger in the car and the accuracy is deteriorated.

  The present invention has been made to solve the above-described problems, and provides an elevator apparatus capable of reducing the size of the weighing apparatus and reducing the cost and improving the detection accuracy of the loaded load. With the goal.

  An elevator apparatus according to the present invention includes a displacement member that is displaced in accordance with a change in a loaded load in a car, and a plurality of displacement detectors that detect the displacement of the displacement member and output a detection signal in accordance with the loaded load. Equipment.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a front view which shows the cage | basket | car of FIG. It is an enlarged view which shows the principal part of FIG. It is sectional drawing which shows the internal structure of the balance apparatus of FIG. It is a side view which shows the principal part of the balance apparatus of FIG. It is sectional drawing which follows the VI-VI line of FIG. FIG. 6 is a side view showing a state where the displacement member of FIG. 5 is displaced downward. It is sectional drawing which follows the VIII-VIII line of FIG. It is a block diagram which shows the function of the control apparatus of FIG. It is a block diagram which shows the principal part of the scale apparatus of the elevator apparatus by Embodiment 2 of this invention. It is a graph which shows the relationship between the position of the core of FIG. 10, and the output from the 1st and 2nd receiving coil. It is a block diagram which shows the principal part of the scale apparatus of the elevator apparatus by Embodiment 3 of this invention. It is a block diagram which shows the principal part of the scale apparatus of the elevator apparatus by Embodiment 4 of this invention. It is a block diagram which shows the principal part of the scale apparatus of the elevator apparatus by Embodiment 5 of this invention. It is a front view which shows the cage | basket | car of the elevator apparatus by Embodiment 6 of this invention. It is a block diagram which shows the function of the control apparatus of the elevator apparatus of FIG. It is a block diagram which shows the principal part of the control system of the elevator apparatus by Embodiment 7 of this invention. It is a block diagram which shows the principal part of the control system of the elevator apparatus by Embodiment 8 of this invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a car 1 and a counterweight 2 are suspended in a hoistway by a plurality of main ropes 3 and are raised and lowered in the hoistway by the driving force of a hoisting machine 4. The hoisting machine 4 includes a drive sheave 5 around which the main rope 3 is wound, a motor 6 that rotates the drive sheave 5, and a brake 7 that frictionally brakes the rotation of the drive sheave 5. The motor 6 and the brake 7 are controlled by the control device 8.

  The car 1 includes a car frame 9, a car room 10 supported by the car frame 9, and a plurality of vibration isolation members 11 provided between the lower part of the car room 10 and the car frame 9. On the upper beam of the car frame 9, a scale device 12 for detecting the loaded load in the car 1 is provided. The scale device 12 generates a detection signal corresponding to the loaded load in the car 1. A detection signal from the scale device 12 is input to the control device 8.

  2 is a front view showing the car 1 shown in FIG. 1, and FIG. 3 is an enlarged view showing a main part of FIG. A rope end fixing rod 13 is connected to the end of each main rope 3. The upper beam of the car frame 9 is provided with a plurality of insertion holes 9a through which the rope end fixing rods 13 are inserted. At the lower end of each rope end fixing rod 13, a flange-like retaining member 13 a that prevents the rope end fixing rod 13 from coming off from the insertion hole 9 a is provided.

  A shackle spring 14 is provided between each retaining member 13 a and the upper beam of the car frame 9. The car frame 9 is displaced in the vertical direction with respect to the rope end fixing rod 13 in accordance with a change in the loaded load in the car 1. The shackle spring 14 is expanded and contracted with the vertical displacement of the car frame 9 with respect to the rope end fixing rod 13.

  A detection plate 15 is attached above the car frame 9 of the rope end fixing rod 13. The detection plate 15 is rotatably connected to the rope end fixing rod 13 via a rotation shaft 15a.

  The scale device 12 includes a plurality of support members 16 installed on the upper beam of the car frame 9, a scale device main body 17 supported by the support member 16, and the detection plate 15 against the car frame 9 in contact with the detection plate 15. It has a displacement member (axial core) 18 that is displaced up and down with respect to the scale device body 17 in accordance with the vertical movement.

  4 is a cross-sectional view showing the internal structure of the scale device 12 of FIG. 3, FIG. 5 is a side view showing the main part of the scale device 12 of FIG. 4, and FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. . An intermediate part of the displacement member 18 is formed with an iron core part 18a whose sectional diameter continuously changes along the axial direction. The iron core portion 18a is formed in a conical shape whose cross-sectional diameter continuously decreases from the upper end to the lower end. In the vicinity of the upper end portion of the displacement member 18, a flange-shaped spring stopper 18b is formed.

  The iron core portion 18 a is disposed inside the outer frame 19. The upper and lower ends of the displacement member 18 protrude outside the outer frame 19. A preload spring 20 is provided between the upper portion of the outer frame 19 and the spring stopper 18b. A stopper 21 that restricts the upward movement of the displacement member 18 is fixed on the outer frame 19.

  A magnet 22 and first and second yokes 23 and 24 are fixed to the outer frame 19. The first yoke 23 has a first connection end portion 23a connected to the N pole of the magnet 22 and a first facing end portion 23b facing the iron core portion 18a. The second yoke 24 has a second connection end 24a connected to the S pole of the magnet 22 and a second facing end 24b facing the iron core 18a. The first opposed end portion 23b and the second opposed end portion 24b are opposed to each other with the iron core portion 18a interposed therebetween.

  A first magnetic sensor 25 as a displacement detection unit that outputs a detection signal corresponding to the amount of magnetic flux between the first and second opposing end portions 23b and 24b is fixed to the first opposing end portion 23b. . A second magnetic sensor 26 serving as a displacement detection unit that outputs a detection signal corresponding to the amount of magnetic flux between the first and second opposing ends 23b and 24b is fixed to the second opposing end 24b. .

  7 is a side view showing a state in which the displacement member 18 of FIG. 5 is displaced downward, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. When the detection plate 15 is displaced in the vertical direction due to a change in the loaded load in the car 1, the displacement member 18 is mechanically displaced in the vertical direction accordingly. When the displacement member 18 is displaced in the vertical direction, the cross-sectional area of the iron core portion 18a located between the opposed end portions 23b and 24b changes. For example, as shown in FIG. 8, when the cross-sectional area of the iron core portion 18a is increased, the amount of magnetic flux passing between the opposed end portions 23b and 24b is increased. Therefore, the magnetic sensors 25 and 26 output detection signals corresponding to the loaded load in the car 1, respectively.

  FIG. 9 is a block diagram showing functions of the control device 8 of FIG. The control device 8 includes first and second load conversion units 27 and 28, first and second determination units 29 and 30, first and second OR operation units 31 and 32, and first and second It has reporting sections 33 and 34. Detection signals from the magnetic sensors 25 and 26 are digitally converted by the control device 8 and processed.

  The first load conversion unit 27 obtains the displacement amount of the displacement member 18 based on the detection signal from the first magnetic sensor 25, and uses the displacement amount of the displacement member 18 and the spring coefficient of the shackle spring 14, Calculate the load in the car 1. The second load conversion unit 28 obtains the displacement amount of the displacement member 18 based on the detection signal from the second magnetic sensor 26, and uses the displacement amount of the displacement member 18 and the spring coefficient of the shackle spring 14, Calculate the load in the car 1.

  The first determination unit 29 determines whether or not the difference between the loads obtained by the first and second load conversion units 27 and 28 has reached a preset threshold value. The detection signal is sent to the first and second OR operation units 31 and 32. The second determination unit 30 determines whether or not the difference between the loads obtained by the first and second load conversion units 27 and 28 has reached a preset threshold, and when the threshold has been reached The abnormality detection signal is sent to the first and second OR operation units 31 and 32.

  The first OR operation unit 31 sends a notification command to the first notification unit 33 when an abnormality detection signal is transmitted from at least one of the first and second determination units 29 and 30. The second OR operation unit 32 sends a notification command to the second notification unit 34 when an abnormality detection signal is transmitted from at least one of the first and second determination units 29 and 30.

  When the first and second notification units 33 and 34 receive the notification command, the first and second notification units 33 and 34 transmit a signal notifying the abnormality of the scale device 12 to the management room. Further, if the scale device 12 is normal, the control device 8 controls the operation of the car 1 based on the information on the loaded load obtained by the first or second load converters 27 and 28.

  Here, the control device 8 is configured by a computer having an arithmetic processing unit (CPU), a storage unit (ROM, RAM, hard disk, etc.) and a signal input / output unit. The functions of the conversion units 27 and 28, the determination units 29 and 30, the OR operation units 31 and 32, and the reporting units 33 and 34 are realized by a computer.

  That is, a program for realizing the functions of the conversion units 27 and 28, the determination units 29 and 30, the OR operation units 31 and 32, and the reporting units 33 and 34 is stored in the storage unit of the computer. The arithmetic processing unit executes arithmetic processing related to the function of the control device 8 based on the control program.

  In addition, a first computer that realizes the functions of the first load conversion unit 27, the first determination unit 29, the first OR operation unit 31, and the first notification unit 33, and the second load conversion unit 28. The second computer that realizes the functions of the second determination unit 30, the second OR operation unit 32, and the second notification unit 34 can be used to communicate with each other between the first and second computers. Also good.

In such an elevator apparatus, since the displacement of one displacement member 18 is detected by the two magnetic sensors 25 and 26, the scale device 12 can be reduced in size and the cost can be reduced. Moreover, since two detection signals are simultaneously output from the scale device 12, the detection accuracy of the loaded load can be improved.
Further, the control device 8 determines the presence / absence of an abnormality in the weighing device 12 based on the difference between the two detection signals, and outputs an abnormality detection signal in the event of an abnormality, so that the reliability of the weighing device 12 can be improved. it can.

Embodiment 2. FIG.
Next, FIG. 10 is a block diagram showing a main part of a scale device of an elevator apparatus according to Embodiment 2 of the present invention. In the figure, a displacement member 41 is brought into contact with, for example, the same detection plate 15 as in the first embodiment, and is displaced in the vertical direction (axial direction) in accordance with a change in the load loaded in the car 1. A cylindrical core 41 a is attached to the displacement member 41. In the vicinity of the upper end portion of the displacement member 41, a flange-shaped spring stopper 41b is formed.

  The core 41 a is disposed inside the outer frame 42. The upper end portion of the displacement member 41 protrudes outside the outer frame 42. A preload spring 43 is provided between the upper portion of the outer frame 42 and the spring stopper 41b.

  In the outer frame 42, first and second transmitting coils 44, 45 surrounding the core 41a and first and second receiving coils 46, 47 as a displacement detecting unit are arranged. A high-frequency current is applied to the first and second transmission coils 44 and 45 and the first. As a result, an induced current is induced in the receiving coils 46 and 47. High-frequency output signals from the receiving coils 46 and 47 are rectified by a diode or the like and sent as a detection signal to the control device 8 (FIG. 9).

  FIG. 11 is a graph showing the relationship between the position of the core 41a in FIG. 10 and the outputs from the first and second receiving coils 46, 47. The output from the first receiving coil 46 is indicated by a solid line, and the second reception The output from the coil 47 is indicated by a broken line. As shown in FIG. 11, when the core 41a is displaced downward (to the right in FIG. 11), the degree of electromagnetic induction coupling between the transmission coils 44 and 45 and the reception coils 46 and 47 changes, and the first reception is performed. The current output from the coil 46 decreases, and the current output from the second receiving coil 47 increases conversely.

  The control device 8 has the same function as in FIG. The first load conversion unit 27 calculates the loaded load in the car 1 based on the detection signal from the first receiving coil 46. The second load conversion unit 28 calculates the loaded load in the car 1 based on the detection signal from the second receiving coil 47. Other configurations are the same as those in the first embodiment.

In such an elevator apparatus, since the displacement of one displacement member 41 is detected by the two receiving coils 46 and 47, the scale device 12 can be reduced in size and the cost can be reduced. Moreover, since two detection signals are simultaneously output from the scale device 12, the detection accuracy of the loaded load can be improved.
In addition, since the displacement of the displacement member 41 is detected using electromagnetic induction due to a high-frequency current, even when a static magnetic disturbance exists, such as when a magnetic body is close to the scale device 12, for example, The detection accuracy can be further improved without being affected by magnetic disturbance.

Embodiment 3 FIG.
Next, FIG. 12 is a block diagram showing a main part of a scale device of an elevator apparatus according to Embodiment 3 of the present invention. In the figure, a displacement member 51 is brought into contact with, for example, the same detection plate 15 as in the first embodiment, and is displaced in the vertical direction (axial direction) in accordance with a change in the load loaded in the car 1. A flange-shaped reflecting plate 51 a is attached to the displacement member 51. In the vicinity of the upper end portion of the displacement member 51, a flange-shaped spring stopper 51b is formed.

  The reflection plate 51 a is disposed inside the outer frame 52. The upper and lower ends of the displacement member 51 protrude outside the outer frame 52. A preload spring 53 is provided between the upper portion of the outer frame 52 and the spring stopper 51b.

  A first support plate 54 positioned above the reflection plate 51a and a second support plate 55 positioned below the reflection plate 51a are fixed to the outer frame 52. A first light emitter 56 and a first light receiver 57 are attached to the first support plate 54 so as to face the upper surface (first reflection surface) of the reflection plate 51a. A second light emitter 58 and a second light receiver 59 are attached to the second support plate 55 so as to face the lower surface (second reflection surface) of the reflection plate 51a.

  The light emitters 56 and 58 irradiate light toward the reflecting plate 51a. The light receivers 57 and 59 receive the light reflected by the reflecting plate 51a and generate a detection signal corresponding to the intensity of the received light. Detection signals from the light receivers 57 and 59 are sent to the control device 8 (FIG. 9).

  The control device 8 has the same function as in FIG. The first load conversion unit 27 obtains the displacement amount of the displacement member 51 based on the detection signal from the first light receiver 57 and uses the displacement amount of the displacement member 51 and the spring coefficient of the shackle spring 14. Calculate the load in the car 1. The second load conversion unit 28 obtains the displacement amount of the displacement member 51 based on the detection signal from the second light receiver 59 and uses the displacement amount of the displacement member 51 and the spring coefficient of the shackle spring 14. Calculate the load in the car 1. The load converters 27 and 28 may obtain the displacement amount of the displacement member 51 using the phase shift of the light received by the light receivers 57 and 59. Other configurations are the same as those in the first embodiment.

In such an elevator apparatus, since the displacement of one displacement member 51 is detected by the two light receivers 57 and 59, the scale device 12 can be reduced in size and the cost can be reduced. Moreover, since two detection signals are simultaneously output from the scale device 12, the detection accuracy of the loaded load can be improved.
Further, since the displacement of the displacement member 51 is detected by the optical sensor, the detection accuracy can be further improved without being affected by the magnetic disturbance.

Embodiment 4 FIG.
Next, FIG. 13 is a block diagram showing a main part of a scale device of an elevator apparatus according to Embodiment 4 of the present invention. In the figure, a displacement member 61 is brought into contact with, for example, the same detection plate 15 as in the first embodiment, and is displaced in the vertical direction (axial direction) in accordance with a change in the loaded load in the car 1. A conical reflector 61 a is attached to the displacement member 61. In the vicinity of the upper end portion of the displacement member 61, a flange-shaped spring stopper 61b is formed.

  The reflector 61 a is disposed inside the outer frame 62. The upper and lower end portions of the displacement member 61 protrude outside the outer frame 62. A preload spring 63 is provided between the upper portion of the outer frame 62 and the spring stopper 61b.

  First and second support plates 64 and 65 are fixed to the outer frame 62. A first light emitter 56 and a first light receiver 57 facing the side surface (reflective surface) of the reflector 61a are attached to the first support plate 64. A second light emitter 58 and a second light receiver 59 that are opposite to the first light emitter 56 and the first light receiver 57 and face the side surface of the reflector 61a are attached to the second support plate 65. It has been. Other configurations are the same as those of the third embodiment.

In such an elevator apparatus, since the displacement of one displacement member 61 is detected by the two light receivers 57 and 59, the scale device 12 can be reduced in size and the cost can be reduced. Moreover, since two detection signals are simultaneously output from the scale device 12, the detection accuracy of the loaded load can be improved.
In addition, since the displacement of the displacement member 61 is detected by the optical sensor, the detection accuracy can be further improved without being affected by the magnetic disturbance.

Embodiment 5 FIG.
Next, FIG. 14 is a block diagram showing a main part of a scale device of an elevator apparatus according to Embodiment 5 of the present invention. In the figure, the first opposing end portion 23b of the first yoke 23 is provided with a first displacement detecting portion that outputs a detection signal corresponding to the amount of magnetic flux between the first and second opposing end portions 23b, 24b. The third magnetic sensors 25 and 35 are fixed. Second and fourth displacement detectors that output detection signals corresponding to the amount of magnetic flux between the first and second opposing ends 23b, 24b are provided to the second opposing end 24b of the second yoke 24. The magnetic sensors 26 and 36 are fixed.

  The first and second magnetic sensors 25 and 26 are disposed symmetrically with respect to the axis of the displacement member 18 in a first plane perpendicular to the axis of the displacement member 18. The third and fourth magnetic sensors 35 and 36 are symmetrical to each other about the axis of the displacement member 18 in a second plane parallel to the plane on which the first and second magnetic sensors 25 and 26 are arranged. Has been placed.

  Detection signals from the first and second magnetic sensors 25 and 26 are input to the first averaging circuit 37. The first averaging circuit 37 inputs a signal obtained by averaging the detection signals from the first and second magnetic sensors 25 and 26 to the control device 8. Detection signals from the third and fourth magnetic sensors 35 and 36 are input to the second averaging circuit 38. The second averaging circuit 38 inputs a signal obtained by averaging the detection signals from the third and fourth magnetic sensors 35 and 36 to the control device 8.

  The control device 8 has the same function as in FIG. The first load conversion unit 27 calculates the loaded load in the car 1 based on the signal from the first average circuit 37. The second load conversion unit 28 calculates the loaded load in the car 1 based on the signal from the second average circuit 38. Other configurations are the same as those in the first embodiment.

  In such an elevator apparatus, since the signals from the sensors located on opposite sides of the displacement member 18 are averaged, variations in the detection signal due to the axial deflection of the displacement member 18 are offset, and the detection accuracy is improved. Can do.

Note that the averaging process as shown in the fifth embodiment can be applied to the sensor of the detection method as shown in the second to fourth embodiments, and can similarly reduce the influence of the axial deflection of the displacement member.
Further, the averaging process may be performed on the signal before being input to the control device or may be performed in the control device.
Further, when the averaging process is performed in the control device, the data before load conversion may be averaged or the data after load conversion may be averaged.

Embodiment 6 FIG.
Next, FIG. 15 is a front view showing a car of an elevator apparatus according to Embodiment 6 of the present invention. In this example, the car 1 is suspended at two places spaced in the width direction of the car 1. Accordingly, first and second weighing devices 12a and 12b are installed on the car frame 9. The configuration of each scale device 12a, 12b is the same as that of the first embodiment.

  FIG. 16 is a block diagram showing functions of the control device 8 of the elevator apparatus of FIG. The first load converter 71 calculates a load based on a detection signal from the first magnetic sensor 25 of the first scale device 12a. The second load converter 72 calculates a load based on the detection signal from the second magnetic sensor 26 of the first scale device 12a. The third load converter 73 calculates a load based on the detection signal from the first magnetic sensor 25 of the second scale device 12b. The fourth load conversion unit 74 calculates a load based on the detection signal from the second magnetic sensor 26 of the second scale device 12b.

  The loads obtained by the first load conversion unit 71 and the third load conversion unit 73 are added by the first addition calculation unit 75, whereby the loaded load in the car 1 is obtained. In addition, the loads obtained by the second load conversion unit 72 and the fourth load conversion unit 74 are added by the second addition calculation unit 76, whereby another calculation result of the loaded load in the car 1 is obtained. can get. Other configurations are the same as those in the first embodiment.

  As described above, when the suspension points of the car 1 are divided and arranged, a plurality of weighing devices 12a and 12b having a plurality of sensors 25 and 26 are installed at the respective suspension points, and different sensors of different weighing devices 12a and 12b are provided. If the signals from 25 and 26 are combined and added, a plurality of calculation results for the loaded load in the car 1 can be obtained.

The installation position of the scale device is not limited to the hanging part of the car (the main rope connecting part), but is, for example, between the car frame and the lower part of the car room or the support part of the hoisting machine. May be.
In the above example, the mechanical displacement of the displacement member is detected by a magnetic sensor, an induced current sensor or an optical sensor. However, the displacement detection unit is not limited to these detection methods. For example, a strain sensor or the like is used. It may be used.
Furthermore, in the first to sixth embodiments, the calculation results of a plurality of loaded loads are compared to determine the presence or absence of an abnormality. However, the comparison determination process is not necessarily executed, and the calculation results of the loaded loads are different from each other. It is also possible to use for this purpose.

Embodiment 7 FIG.
Next, FIG. 17 is a block diagram showing a main part of an elevator apparatus control system according to Embodiment 7 of the present invention. In the figure, the scale device 81 includes a displacement member (not shown) that is displaced in accordance with a change in the loaded load in the car 1 (FIG. 1), and a detection signal that detects the displacement of the displaced member and that corresponds to the loaded load. Are provided. First and second displacement detectors 82 and 83 are provided. The specific configuration of the scale device 81 is the same as that shown in the first to sixth embodiments, for example.

  A detection signal from the first displacement detector 82 is input to the control device 8 that controls the operation of the car 1. The control device 8 includes a first load conversion unit 84 and a drive pattern calculation unit 85. The first load conversion unit 84 calculates the loaded load in the car 1 based on the detection signal from the first displacement detection unit 82. The drive pattern calculation unit 85 calculates the drive pattern of the hoisting machine 4 (FIG. 1) according to the loaded load obtained by the first load conversion unit 84.

  The detection signal from the second displacement detector 83 is input to a safety device 86 that monitors the presence or absence of an abnormality in the elevator apparatus. The safety device 86 includes a second load conversion unit 87 and an emergency braking unit 88. The second load conversion unit 87 calculates the loaded load in the car 1 based on the detection signal from the second displacement detection unit 83.

  The emergency braking unit 88 determines whether or not the elevator apparatus has an abnormality based on the car position information, the car speed information, and the like, and outputs a command signal for emergency stop of the car 1 when an abnormality is detected. At this time, the emergency braking unit 88 controls the emergency braking method according to the loaded load obtained by the second load converting unit 87.

  For example, the emergency braking unit 88 changes the braking force at the time of emergency braking according to the load, and prevents the passengers in the car 1 from feeling uncomfortable due to unnecessary deceleration. As a method for controlling the braking force, for example, a method in which a plurality of brakes 7 are provided in one hoisting machine 4 and the operation timing of the brakes 7 at the time of emergency braking is shifted can be cited.

  The control device 8 can be configured by a computer. In this case, the functions of the first load conversion unit 84 and the drive pattern calculation unit 85 are realized by the computer of the control device 8. The safety device 86 can be configured by a computer different from the computer of the control device 8, for example. In this case, the functions of the second load conversion unit 87 and the emergency braking unit 88 are realized by the computer of the safety device 86. The safety device 86 can also be configured by an analog electric circuit.

  In such an elevator apparatus, since the detection signal for the control device 8 and the detection signal for the safety device 86 are obtained from one weighing device 81, the weighing device 81 can be reduced in size and the cost can be reduced. Further, since the detection signal for the control device 8 and the detection signal for the safety device 86 are obtained separately, the reliability can be improved.

  In the seventh embodiment, the detection signal output from the scale device 81 is assigned to the control device 8 and the safety device 86, but may be assigned to another device.

Embodiment 8 FIG.
Next, FIG. 18 is a block diagram showing a main part of an elevator apparatus control system according to Embodiment 8 of the present invention. In the figure, the first displacement detector 82 and the control device 8 are supplied with power from a first power supply 89. The second displacement detector 83 and the safety device 86 are supplied with power from the second power supply 90. A battery 91 is connected to the second power supply 90. The second power supply 90 is backed up by the battery 91 during a power failure. Other configurations are the same as those of the seventh embodiment.

In such an elevator apparatus, the emergency braking method can be controlled by obtaining the loaded load even in the event of a power failure, so that the reliability can be improved.

Claims (4)

A scale device comprising: a displacement member that is displaced in accordance with a change in the load in the car; and a plurality of displacement detectors that respectively detect the displacement of the one displacement member and output a detection signal in accordance with the load .
A control device for controlling the operation of the car, and
Equipped with a safety device for emergency braking of the car in the event of an abnormality ,
The displacement detector includes first and second displacement detectors,
An elevator apparatus in which a detection signal from the first displacement detection unit is input to the control device, and a detection signal from the second displacement detection unit is input to the safety device. Upper Symbol controller determines whether the difference between the detection signal from the detection signal and the second displacement detector from the first displacement detecting portion has reached the threshold, if the threshold has been met that occur an abnormality detection signal 請 Motomeko 1 elevator apparatus according. Upper Symbol controller controls the operation of the car in accordance with a detection signal from the first displacement detector,
The elevator apparatus according to claim 1, wherein the safety device controls a braking force at the time of emergency braking according to a detection signal from the second displacement detection unit.   The elevator apparatus according to claim 3, further comprising a battery that supplies power to the safety device during a power failure.

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