JPH10245178A - Vibration preventing device for elevator car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve riding comfort by preventing an elevator car from being vibrated. SOLUTION: This devise allows an acceleration sensor 17 to detect acceleration applied to a car platform, and to send a signal to a magnet adjusting means 18 when the car platform 12 starts vibrating as vibration is generated to an elevator car. The magnetic adjusting means 18 adjusts magnetic force between electric magnets based on the acceleration signal received from the acceleration sensor in such a way as to cancel acceleration by controlling the energizing current applied to oppositely faced electric magnets 15 and 16. Thereby, the vibration of a car platform due to vibration generated to an elevator car is restrained, and vibration applied to passengers is restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration preventing device for an elevator car.

[0002]

2. Description of the Related Art Conventionally, an elevator car has a structure shown in FIG. 12, in which a car floor 2 is integrally attached to a cab 1 suspended by ropes and driven up and down. And this elevator car is guided via guide rollers by guide rails installed in the hoistway,
Ascent and descent while maintaining straight running stability.

[0003]

In such a conventional elevator car structure, as the elevator speed increases, the vibration acting on the elevator car also increases, and the car floor vibrates, giving passengers a feeling of discomfort and anxiety. There was a point. This is because the guide rails installed in the hoistway always have a seam at a fixed length, and when the guide roller passes through this seam part, the unevenness of the seam can be picked up and the vibration can be transmitted to the elevator car. Responsible.

In order to prevent the guide rollers from picking up such irregularities in the joints of the guide rails, springs, dampers, etc. are attached to the roller portions to provide a structure for absorbing vibrations, or to increase the elasticity of the rollers to increase vibration absorption. It has a good structure. However, in a high-speed elevator, such measures are not enough to prevent vibration, and it is expected that the problem will be further exacerbated in future high-speed elevators.

[0005] Further, while the guide rails have good linearity and efforts have been made to install the guide rails as vertically as possible, the linearity of the guide rails cannot be made perfect. It has not been possible to prevent the elevator car from vibrating due to distortion of the guide rail during high-speed running.

In addition, since the elevator car is suspended by a rope, the rope is stretched and contracted by the inertial force of the elevator car particularly during acceleration and deceleration.
This appears as vibration of the elevator car, but no measures have been taken to prevent such vibration.

[0007] The present invention has been made in view of such conventional problems, and is intended to prevent the vibration of the elevator car caused by the bending of the guide rail, the unevenness of the seam, and the expansion and contraction of the rope from being transmitted to the passengers in the car. It is an object of the present invention to provide an elevator car vibration preventing device with improved ride comfort.

[0008]

According to a first aspect of the present invention, there is provided an elevator car vibration preventing apparatus having a plurality of car floors arranged horizontally in the middle of a car room in a suspended state and installed at the bottom of the car room. The electromagnet and a plurality of electromagnets installed on the lower surface of the car floor are opposed to each other, the car floor is horizontally supported by a magnetic force between a plurality of sets of opposing electromagnets, and an acceleration sensor is installed near each of the electromagnets on the car floor, A magnetic force adjusting means for adjusting a magnetic force between electromagnets facing each other in a direction to cancel the acceleration detected by the acceleration sensor is provided.

In the vibration preventing apparatus for an elevator car according to the first aspect of the present invention, when vibration occurs in the elevator car and the car floor starts to vibrate, the acceleration sensor detects the acceleration acting on the car floor and gives it to the magnetic force adjusting means. . The magnetic force adjusting means controls the amount of electricity to the opposing electromagnets based on the acceleration signal received from the acceleration sensor to adjust the magnetic repulsion so as to cancel the acceleration. As a result, even if vibrations occur in the cab, vibrations of the car floor are suppressed, and vibrations transmitted to passengers are suppressed.

According to a second aspect of the present invention, there is provided a vibration preventing device for an elevator car, wherein a car floor is horizontally suspended in the middle of a car room, and a plurality of electromagnets installed at the bottom of the car room and a lower surface of the car floor are provided. A plurality of installed electromagnets are opposed to each other, the car floor is horizontally supported by magnetic force between a plurality of sets of opposed electromagnets, and an inclination angle sensor is installed on the car floor to cancel the inclination detected by the inclination angle sensor. Magnetic force adjusting means for adjusting the magnetic force between electromagnets facing each other in the direction is provided.

In the vibration preventing apparatus for an elevator car according to the second aspect of the present invention, when the car floor is tilted from a horizontal state due to vibration, the tilt angle sensor detects the tilt, and the magnetic force adjusting means energizes the opposing electromagnets. The amount is controlled and adjusted so as to cancel the inclination from the horizontal. As a result, even if vibrations occur in the cab, vibrations of the car floor are suppressed, and vibrations transmitted to passengers are suppressed.

According to a third aspect of the present invention, there is provided the vibration preventing device for an elevator car according to the first or second aspect, further comprising: a gap sensor for detecting each of a plurality of gaps between the bottom surface of the cab and the bottom surface of the car floor; When one of the gaps detected by the gap sensor greatly fluctuates beyond a predetermined value, there is provided a gap adjusting means for adjusting the magnetic repulsive force between the electromagnets facing each other in a direction to return the gap to the reference value.

[0013] In the vibration preventing device for an elevator car according to the third aspect of the present invention, the gap sensor serves as a backup when the acceleration sensor or the inclination angle sensor fails and the acceleration or inclination of the car floor cannot be correctly detected. Monitoring the gaps at a plurality of locations between the bottom surface of the car and the bottom surface of the car floor, and when any of the gaps detected by these gap sensors greatly fluctuates beyond a predetermined value, the gap adjusting means refers to the gap. The magnetic force between the opposing electromagnets is adjusted in the direction to return to the value, and the car floor is prevented from being extremely tilted or vibrated.

According to a fourth aspect of the present invention, there is provided the elevator car vibration preventing apparatus according to any one of the first to third aspects, further comprising:
A cushioning material that prevents horizontal displacement of the car floor is attached to the periphery of the car floor, and the cushioning material is supported on the side of the cab, and when the car floor tries to displace in the horizontal direction due to vibration. A cushioning material buffers the displacement.

According to a fifth aspect of the present invention, there is provided the vibration preventing apparatus for an elevator car according to any one of the first to third aspects, further comprising an electromagnet for vertically supporting the periphery of the car floor attached to a side surface of the car room, It is supported in a magnetic levitation state by an electromagnet, and the horizontal displacement of the car floor is buffered by the magnetic force of these supporting electromagnets.

According to a sixth aspect of the present invention, there is provided the elevator car vibration preventing apparatus according to any of the first to third aspects, wherein gaps between a plurality of locations on the periphery of the car floor and a plurality of opposed locations on the side of the cab are further defined. A gap sensor for detecting, a horizontal displacement detecting means for detecting a horizontal displacement of the car floor based on a gap detection value detected by each of the gap sensors, and a horizontal displacement detected by the horizontal displacement detecting means. Lateral displacement correcting means for horizontally moving the car floor in the direction.

In the vibration preventing apparatus for an elevator car according to the present invention, when the car floor is displaced in the horizontal direction by vibration, the horizontal displacement detecting means detects the horizontal displacement of the car floor based on the gap detection value detected by the gap sensor. Is detected, and the lateral displacement correcting means controls the horizontal movement of the car floor in a direction to offset the displacement amount in the horizontal direction, and controls the car floor to return to the original position, thereby preventing the horizontal displacement of the car floor.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an elevator car vibration preventing device according to a first embodiment of the present invention.
The car floor 1 is suspended in the cab 11 of the elevator.
The car floor 12 is provided with a cushion 13 made of a flexible and low-friction material, such as rubber or urethane foam, which is attached so as to go around the side surface of the cab 11. The buffer 14 of the same material attached to the peripheral portion of the contact member abuts.

A suitable plurality of locations on the bottom of the cab 11 (for example, three locations 120 ° apart around the center, 4
Lower electromagnets 15 are installed at the corners or at the center of each of the four sides, and these lower electromagnets 1 on the lower surface of the car floor 12.
The upper electromagnet 16 is attached to each of the locations corresponding to the upper and lower electromagnets 15, 15.
By generating the same magnetic repulsive force between the 16, the car floor 12 is supported horizontally in a suspended state with respect to the bottom surface of the car room 11. Acceleration sensors 17 are also provided at a plurality of appropriate locations on the lower surface of the car floor 12 so as to detect the acceleration generated in each part of the car floor 12.

A control circuit 1 for adjusting magnetic repulsion between a plurality of sets of opposed lower electromagnets 15 and upper electromagnets 16.
8 are provided, and a plurality of sets of opposing lower sides are provided so as to receive acceleration signals from the respective acceleration sensors 17 and generate magnetic repulsive force necessary for canceling out each of the accelerations at a corresponding place. , The current to each of the upper electromagnets 15 and 16 is controlled to increase or decrease.

The control circuit 18 has a functional configuration shown in FIG. Here, the lower electromagnets 15a to 15d are respectively installed at the center positions of the four sides of the bottom surface of the car room 11, and face the lower electromagnets at the center positions of the four sides of the lower surface of the car floor 12. The upper electromagnet 16a
16d are installed, and acceleration sensors 17a to
17d will be described as being installed near these upper electromagnets 16a to 16d.

The acceleration signals Ga to Gd of the acceleration sensors 17a to 17d are input, and the current values Ia to Id required to generate magnetic repulsion required to cancel the acceleration signals Ga to Gd. An acceleration-current (GI) conversion unit 21 for calculating each of them, and a GI conversion unit 21
, The lower electromagnets and the upper electromagnets 15a of the opposing sets at the positions corresponding to the currents Ia to Id of the magnitudes calculated by
16b to 15d; a current control circuit 22 for energizing 16d.

Next, the operation of the above-described elevator car vibration preventing device will be described. When vibration occurs during elevator traveling, the car room 11 vibrates, and the car floor 12 also starts vibrating, acceleration signals Ga to Gd are input to the control circuit 18 from the acceleration sensors 17a to 17d at the respective positions. .

Therefore, the acceleration-current conversion section 21 of the control circuit 18 inputs the acceleration signals Ga to G based on the acceleration-current conversion table registered in advance.
The current values Ia to Id required to generate the magnetic repulsion required to cancel them are calculated for each of the values d and output to the current control circuit 22 as current command values. In the current control circuit 22, currents of magnitudes corresponding to the given current command values Ia to Id are supplied to the lower electromagnets and the upper electromagnets 15 a; 16 b to 15 d; A magnetic repulsive force is applied to each position to cancel the acceleration generated due to the vibration, and the car floor 12 is always kept in a substantially horizontal state with little vibration.

On the other hand, when the car floor 12 is displaced in the horizontal direction, the displacement of the car floor 12 is buffered by the low friction between the shock absorbers 13 and 14 and the elasticity is flexible, and the car floor 12 is pushed back to the original position.

As described above, the vibration preventing device for the elevator car according to the first embodiment detects the acceleration generated in each part of the car floor 12 even when the car room 11 is vibrated, and detects the acceleration of each part. The vibration of the car floor 12 is prevented by generating a magnetic repulsion force of a magnitude that cancels the
This is to improve ride comfort.

Next, a second embodiment of the present invention will be described with reference to FIG. The feature of the second embodiment resides in the support structure of the peripheral portion of the car floor 12, in which at least four central portions are equal in the vertical direction provided at four corresponding positions on the side surface of the car room 11. Peripheral edge supporting electromagnets 23a, 23 that generate magnetic force and magnetic force equal in the horizontal direction
b, 23c are provided to balance the vertical and horizontal forces acting on the car floor 12 from each peripheral portion. The other mechanisms for preventing vibration of the car floor 12 are the same as those of the first embodiment shown in FIGS.

In the case of the second embodiment, the vibration generated on the car floor 12 is attenuated in the same manner as in the first embodiment, and the vibration is always kept almost horizontal with little vibration. In addition, for the displacement in the horizontal direction, the peripheral supporting electromagnets 23a, 23b, and 23c are provided at various positions on the peripheral edge and generate magnetic forces balanced in the vertical and horizontal directions.
Can be supported by always returning to the normal position.

Next, a third embodiment of the present invention will be described with reference to FIG. The feature of the third embodiment is that a horizontal displacement correcting function is further added to the horizontal displacement preventing mechanism of the second embodiment shown in FIG. This is common to the first embodiment shown in FIGS.

Referring to FIG. 4, the structure of the mechanism for correcting horizontal displacement of the car floor 12 will be described. Offset plates 24-1 to 24-4 are provided at appropriate places on the car floor 12, for example, at the center of each of four sides.
And gap sensors 25-1 to 25-4 for monitoring gaps between the offset plates 24-1 to 24-4 are provided at opposing portions on the four side surfaces of the car room 11, respectively. The horizontal displacement control circuit 26 monitors the gap amounts detected by the sensors 25-1 to 25-4, and corrects the horizontal displacement by controlling the amount of current supplied to each of the electromagnets 23b-1 to 23b-4. .

That is, as shown in FIG. 5, the horizontal displacement control circuit 26 calculates (a1-a1) for the gap amounts a1 to a4 input by the gap sensors 25-1 to 25-4, respectively.
a3) and (a2-a4) are calculated to obtain the displacement amounts δ1 and δ2 in the directions of the two axes, respectively. Further, the electromagnets 24b-1 to 24b-4 are used to correct the displacement amounts δ1 and δ2 by a built-in table. The displacement-current converter 27 for calculating the amount of current i1 to i4 that needs to be supplied to each of them, and supplies the current having the magnitude of the current command values i1 to i4 to each of the electromagnets 24b-1 to 24b-4. It comprises a current control circuit 28.

The damping action for the vertical vibration of the car floor 12 by the elevator car vibration preventing device of the third embodiment is the same as that of the first embodiment. The correcting operation for the horizontal displacement of the car floor 12 is as follows.

The displacement-current (δ-I) converter 27 calculates (a1-a3) and (a2-a3) for the gap amounts a1 to a4 input by the gap sensors 25-1 to 25-4, respectively.
a4) is calculated to calculate the displacement amount δ in each of the two horizontal axes.
1 and δ2, and the electromagnet 24b− is used to correct these displacement amounts δ1 and δ2 by a built-in table.
Current amount i that needs to be supplied to each of 1 to 24b-4
1 to i4 are calculated. Then, the current control circuit 28 generates currents of the magnitudes i1 to i4 from the power supply and supplies the currents to the electromagnets 24b-1 to 24b-4.

Thus, in the vibration preventing apparatus for an elevator car according to the third embodiment, the vertical vibration of the car floor 12 against the vertical vibration of the car floor 12 is similar to that of the first embodiment.
The acceleration generated in each part is detected, and a magnetic repulsive force having a magnitude to cancel the acceleration of each part is applied to the electromagnets 15 and
By damping the vibrations by causing them between the two, the car floor 12 is maintained in a horizontal state, and when the car floor 12 is displaced in the horizontal direction, the horizontal displacement is corrected in the above-described manner, so that the car floor is always kept. 12 can be supported substantially horizontally in the proper position, and the influence of vibration can be minimized, so that the riding comfort can be improved.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The vibration preventing device for an elevator car according to the fourth embodiment differs from the first embodiment shown in FIGS. 1 and 2 in that the acceleration sensor 17 in the first embodiment shown in FIG. The inclination angle sensors 30x and 30y for detecting the inclination angle are provided, and the inclination angle sensors 30x and 30y are controlled by the control circuit 18 '.
Angles αx, α in the directions of the two orthogonal axes detected by
By adjusting the current flowing through the magnetic repulsive force between the opposing sets of the lower electromagnets 15a to 15d and the upper electromagnets 16a to 16d so as to cancel them and return to the horizontal state corresponding to y. It is characterized by controlling and damping the vibration of the car floor 12 and always maintaining a horizontal state. Hereinafter, portions common to the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the fifth embodiment will be described.

The inclination angle sensors 30x and 30y are formed by two orthogonal axes, each of which connects a pair of lower electromagnets 15a to 15d and an upper electromagnet 16a to 16d which are opposed to each other in a horizontal direction. Here, the x-axis and the y-axis are attached to the center of the lower surface of the car floor 12 so as to match them. And these inclination angle sensors 30x, 3
The tilt angle signal detected by 0y is input to the control circuit 18 '.

As shown in FIG. 7, the control circuit 18 'outputs signals αx and αy from the inclination angle sensors 30x and 30y, respectively.
And a slope-current converter 21 'for calculating the magnitudes Ia-Id of the currents to be passed through the corresponding sets of electromagnets 15a; 16a-15d; 16d in order to cancel these inclination angles. A current control circuit 22 for supplying a current having a magnitude corresponding to each of the current command values Ia to Id calculated by the current converter 21 'to each set of the electromagnets 15a; 16a to 15d; 16d.

Next, the operation of the vibration preventing device for an elevator car according to the fourth embodiment having the above configuration will be described. Vibration occurs during the elevator traveling, the cab 11 vibrates,
When the car floor 12 is also tilted by vibration, the tilt angle sensor 3
0x and 30y are the inclination angles α in the directions of the two orthogonal axes.
x and αy are detected and input to the control circuit 18 '.

The slope-current converter 21 'of the control circuit 18'
Then, based on the tilt angle-current conversion table registered in advance, the current values Ia to Id required to generate the magnetic repulsion required to cancel the input tilt angles αx and αy, respectively. Is calculated and output to the current control circuit 22 as a current command value. The current control circuit 22 outputs the currents Ia to Id that match the given current command value to the lower electromagnet 15 and the upper electromagnet 15 that face each other.
a; 16b to 15d; 16d is energized to give a magnetic repulsive force to lift the part lowered by vibration, and the car floor 12 is maintained in a horizontal state.

It should be noted that the displacement of the car floor 12 in the horizontal direction is similar to that of the first embodiment shown in FIG.
The displacement is absorbed by 3 and 14 and restored to the normal position.

As described above, in the elevator car vibration preventing apparatus according to the fourth embodiment, if the car floor 12 is tilted due to the vibration of the car room 11, the tilt angle of the car floor 12 is checked. The car floor 12 is kept horizontal by generating a magnetic repulsive force in the lower and upper electromagnet sets corresponding to the magnitude where the inclination is canceled, so as not to be directly affected by the vibration, The aim is to improve comfort.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The features of the fifth embodiment are the same as those of the second embodiment shown in FIG.
Peripheral supporting electromagnets 23a, which generate the same magnetic force in the vertical direction and the same magnetic force in the horizontal direction, provided at the four corresponding portions of the side surface of the car room 11 at the center of each side.
23b and 23c are provided so as to balance the vertical and horizontal forces acting on the car floor 12 from each peripheral portion. The other vibration preventing mechanisms of the car floor 12 are shown in FIG.
This is the same as the fourth embodiment shown in FIG.

In the case of the fifth embodiment, the vibration generated on the car floor 12 can be attenuated and maintained in a horizontal state by the same method as in the fourth embodiment. For the displacement in the horizontal direction, the peripheral supporting electromagnets 23a, 23 which are installed at various positions on the peripheral edge as in the second embodiment and generate magnetic forces balanced in the vertical and horizontal directions.
The support can be made such that it always returns to the normal position by the action of b and 23c.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. The vibration preventing device for an elevator car according to the sixth embodiment has a structure similar to that of the fourth embodiment shown in FIGS.
The present embodiment is characterized in that it has a vibration prevention mechanism similar to that of the third embodiment, and a horizontal displacement correcting mechanism similar to that of the third embodiment shown in FIGS. Therefore, the tilt angle sensors 30x, 3 in the two orthogonal directions are controlled by the control circuit 18 '.
A current that can generate a magnetic repulsive force that cancels the inclination of the car floor 12 detected by 0y is supplied to a pair of lower and upper electromagnets corresponding to a corresponding place to maintain a horizontal state, and at the same time, to a horizontal displacement, With the method of the third embodiment, the car floor 12 can be moved horizontally so that the horizontal displacement is pushed back to the normal position.

Next, a seventh embodiment of the present invention will be described with reference to FIG.
It will be described based on. The seventh embodiment is different from the first embodiment shown in FIGS. 1 and 2 in that each of the upper electromagnets 16a to 16d (16 in FIG. 10; the same applies hereinafter) is further provided on the lower surface of the car floor 12. Offset plate 31
a to 31d (31 in FIG. 10; the same applies hereinafter) and the offset plates 31a to 31d
Gap sensors 32a to 32d for detecting a gap with 31d
32d (32 in FIG. 10, the same applies hereinafter) is installed, and changes in the gap amounts d1 to d4 detected by the gap sensors 32a to 32d are monitored, and the acceleration sensors 17a to 17d are monitored.
When d fails, the change in the gap amounts d1 to d4 is observed, and if they greatly change from the reference value, they are corrected so as to correct them. The backup control circuit 33 for controlling the

That is, as shown in FIG. 11, the backup control circuit 33 inputs the gap amounts d1 to d4 detected by the respective gap sensors 32a to 32d, A gap change-current converter 34 for calculating current values Ia to Id that need to be supplied to the corresponding lower and upper electromagnet sets in order to correct the change, and output from the gap change-current converter 34. The current control circuit 35 supplies a current having the magnitude of the current command values Ia to Id to each set of the lower and upper electromagnets 15a; 16a to 15d; 16d.

When any of the acceleration sensors 17a to 17d fails, the car floor 12 is controlled by the control circuit 18.
Is large, the backup control circuit 3
If the gap change-current converter 34 determines that any one of the gap amounts d1 to d4 detected by the gap sensors 32a to 32d has greatly changed from the specified value, the control by the control circuit 18 is stopped and the backup is performed. The control is switched to the control on the control circuit 33 side. Then, the current values Ia to Id that need to be supplied to the corresponding lower and upper electromagnet pairs to correct the change in the gap are calculated, and the current control circuit 35
And the current command value Ia given by the current control circuit 35
To the lower and upper electromagnets 15a;
a to 15d; 16d, and is controlled so that the car floor 12 is parallel to the bottom of the car room 11. Thereby, the reliability of the system can be improved.

The installation of the gap sensor and the backup control circuit of the seventh embodiment can be performed in any of the first to sixth embodiments.

In each of the above embodiments, the case where the acceleration sensor and the upper electromagnet are installed at the center of each of the four sides of the car floor has been described. However, the installation locations are not particularly limited.
Four corners may be used, and more generally, if the arrangement is such that the inclination of the car floor in any direction from the horizontal state can be detected, it is possible to install the car floor at three appropriate places. There are no restrictions on the location or number of installations.

[0050]

As described above, according to the first aspect of the present invention,
When vibrations occur in the elevator car and the car floor begins to vibrate, the acceleration sensor detects the acceleration acting on the car floor and gives it to the magnetic force adjusting means, based on the acceleration signal received from the acceleration sensor by the magnetic force adjusting means. The amount of power to the vehicle is controlled so that the magnetic force between the electromagnets is adjusted to cancel the acceleration, so even if vibrations occur in the cab, the vibrations on the car floor are suppressed and the vibrations transmitted to passengers are suppressed. And the ride comfort can be improved.

According to the second aspect of the present invention, when the car floor tilts from the horizontal state due to vibration, the tilt angle sensor detects the tilt, and the magnetic force adjusting means controls the amount of electricity to the opposing electromagnets to control the horizontal. The magnetic force between the electromagnets is adjusted so as to cancel the inclination from the vehicle, so even if vibration occurs in the cab, the vibration of the car floor is suppressed, the vibration transmitted to the passengers is suppressed, and the riding comfort is improved. I can do it.

According to the third aspect of the present invention, as a backup when the acceleration sensor or the inclination angle sensor fails and the acceleration or inclination of the car floor cannot be correctly detected, the bottom surface of the car room and the lower surface of the car floor are provided by the gap sensor. Is monitoring each of the multiple gaps between
When any of the gaps detected by these gap sensors greatly fluctuates beyond a predetermined value, the gap adjusting means adjusts the magnetic force between the opposing electromagnets in the direction of returning the gap to the reference value. In addition, the car floor can be prevented from being extremely tilted or vibrated, and the reliability of the system can be improved.

According to the fourth aspect of the present invention, in addition to the first to third aspects, a cushioning material for preventing the car floor from being displaced in the horizontal direction is attached to the periphery of the car floor, and the cushioning material is attached to the cab. When the car floor tries to displace in the horizontal direction due to vibration, the cushioning material can buffer the displacement.

According to the fifth aspect of the present invention, in addition to the first to third aspects of the present invention, the periphery of the car floor is further magnetized by a vertically supporting electromagnet and a horizontal supporting electromagnet attached to the side of the cab. Since the car floor is supported in a floating state, the horizontal displacement of the car floor can be buffered by the magnetic force of these supporting electromagnets.

According to the invention of claim 6, when the car floor is displaced in the horizontal direction by vibration, the horizontal displacement detecting means detects the horizontal displacement of the car floor based on the gap detection value detected by the gap sensor, and corrects the lateral displacement. The means moves the car floor horizontally in the direction to offset the horizontal displacement and controls the car to return to the original position, so preventing the vertical vibration of the car floor and ensuring the horizontal displacement Can be prevented.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is a functional block diagram of a control circuit according to the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a third embodiment of the present invention.

FIG. 5 is a functional block diagram of a control circuit according to the third embodiment.

FIG. 6 is an explanatory diagram of a fourth embodiment of the present invention.

FIG. 7 is a functional block diagram of a control circuit according to the fourth embodiment.

FIG. 8 is an explanatory diagram of a fifth embodiment of the present invention.

FIG. 9 is an explanatory view of a sixth embodiment of the present invention.

FIG. 10 is an explanatory view of a seventh embodiment of the present invention.

FIG. 11 is a functional block diagram of a backup control circuit according to the seventh embodiment.

FIG. 12 is an explanatory view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Car room 12 Car floor 13 Buffer body 14 Buffer body 15, 15a-15d Lower electromagnet 16, 16a-16d Upper electromagnet 17, 17a-17d Acceleration sensor 18, 18 'Control circuit 21 Acceleration-current conversion part 21' Incline- Current converter 22 Current control circuit 23a, 23c Electromagnet 23b, 23b-1 to 23b-4 Electromagnet 24-1 to 24-4 Offset plate 25-1 to 25-4 Gap sensor 26 Displacement control circuit 27 Displacement-current converter 28 Current control circuit 30x, 30y Incline angle sensor 31 Offset plate 32, 32a to 32d Gap sensor 33 Backup control circuit 34 Gap change-current conversion unit 35 Current control circuit

Claims (6)

[Claims] Claims: 1. A car floor is horizontally suspended in the middle of a car room, and a plurality of electromagnets installed on the bottom of the car room and a plurality of electromagnets installed on the lower surface of the car floor are opposed to each other. The car floor is horizontally supported by the magnetic force between the plurality of opposed electromagnets, and an acceleration sensor is installed near each of the electromagnets on the car floor, and the acceleration sensor detects the acceleration in a direction to cancel the acceleration. An anti-vibration device for an elevator car, comprising magnetic force adjusting means for adjusting a magnetic force between opposing electromagnets. 2. The car floor is horizontally suspended in the middle of the car room, and a plurality of electromagnets installed on the bottom of the car room and a plurality of electromagnets installed on the lower surface of the car floor face each other. The car floor is horizontally supported by a magnetic force between the plurality of sets of opposing electromagnets, and an inclination angle sensor is installed on the car floor, and the car floor is opposed to each other in a direction to cancel the inclination detected by the inclination angle sensor. An elevator car vibration preventing device comprising magnetic force adjusting means for adjusting a magnetic force between electromagnets. 3. A gap sensor for detecting a plurality of gaps between a bottom surface of the car room and a lower surface of the car floor, and one of the gaps detected by the gap sensor greatly fluctuates beyond a predetermined value. 2. A gap adjusting means for adjusting a magnetic force between the opposing electromagnets in a direction for returning the gap to a reference value at a time.
Or the vibration preventing device for an elevator car according to 2. 4. The car floor according to claim 1, wherein a cushioning member for preventing horizontal displacement of the car floor is attached to a peripheral portion of the car floor, and the cushioning member is supported on a side surface of the car room. The vibration preventive device for an elevator car according to Claim 1. 5. The rim of the car floor is supported in a magnetic levitation state by a vertical supporting electromagnet and a horizontal supporting electromagnet attached to the side surface of the cab.
The vibration preventing device for an elevator car according to any one of claims 1 to 3. 6. A lateral gap sensor for detecting a gap between each of a plurality of peripheral portions of the car floor and a plurality of opposing portions of the side surface of the car, and a gap detection for each of the lateral gap sensors. Based on the value,
Horizontal displacement detecting means for detecting the horizontal displacement of the car floor; and lateral displacement correcting means for horizontally moving the car floor in a direction to offset the horizontal displacement detected by the horizontal displacement detecting means. The vibration preventing device for an elevator car according to any one of claims 1 to 3.