JPH0680354A - Elevator - Google Patents

Abstract

PURPOSE:To provide an elevator in which vibration of an elevator cage can be reduced with a light weighted device and at a low cost, and lateral vibration generated at running can be more reduced compared with a customary one. CONSTITUTION:This is concerned with an elevator in which roller guides 3 are provided on the desired positions of a car frame 4, and a car consisting of a cage 5 supported in the car frame 4 through vibrationproof rubber is constituted so as to be elevatably moved in the condition of contacting with guide rails 1 arranged in an elevator passage. The elevator is provided with a displacement gauge 12 to detect displacement of the roller guides 3, an accelerometer 9 to detect acceleration of the cage 5, an actuator which is arranged between the cage 5 and the car frame 4, composed of piezoelectric element group 7 laminating a plurality of piezoelectric elements into a multilayer, and can move the cage 5 in the lateral direction, and a means to drive the actuator according to the acceleration signal detected with the accelerometer 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator installed in a hoistway of a building, and more particularly to a car.

[0002]

2. Description of the Related Art FIG. 5 shows a schematic configuration diagram of a conventional elevator. In the hoistway of the building, a guide rail 1 is installed vertically to the ground and fixed to the building by a bracket 2. At that time, the guide rail 1 has an initial deflection at the time of mounting.

Further, when the car consisting of the car room 5 and the car frame 4 travels along the guide rail 1, the guide rail 1 is bent by the pressing force of the roller guides 3a, 3b, 3c, 3d. (Referred to as "deflection"), the initial deflection and the traveling deflection of the guide rail 1 are the roller guide 3a.
~ 3d, to generate horizontal vibration in the cab 5,
Reduce ride comfort. This lateral vibration increases as the elevator speed increases, which may cause the ride comfort to deviate from the allowable range. Roller guides 3a-3d
An elastic body 10 having an appropriate constant is provided between the cage frames 4 to absorb the lateral vibration transmitted by the bending of the guide rail 1 to some extent. Further, a vibration-proof rubber 6 is provided between the car room 5 and the car frame 4 to prevent the vibration transmitted to the car frame 4 from being transmitted to the car room 5 to some extent.

[0004]

As described above, in the conventional structure of the elevator, the vibration of the high frequency component is almost removed, but the low frequency component may still remain, and when the speed is further increased from the current state. , The vibration transmitted from the guide rail 1 cannot be suppressed sufficiently, so the cab 5
There is still the possibility of vibrations that affect the ride comfort. In order to reduce this vibration and further improve the riding comfort, it is conceivable to improve the guide rail 1 which is the source of vibration and reduce the amount of bending. As a means for improving the guide rail 1, it is conceivable to increase the processing accuracy of the guide rail 1 and at the same time increase the mounting accuracy.

However, it is practically difficult to further improve the machining accuracy of the guide rail 1. In addition, although it is necessary to increase the accuracy of mounting the guide rail 1, it is difficult to further improve the accuracy of the installation when the building in which the guide rail 1 is installed shrinks due to the weight of the equipment. These are more prominent as the building rises.
For these reasons, significant reduction in vibration due to improvement of the guide rail 1 cannot be expected.

On the other hand, in order to reduce the traveling deflection of the guide rail 1 due to the eccentric load of the car room 5, it is conceivable to shorten the mounting interval of the brackets 2, but the number of brackets 2 to be installed increases, and the installation time is increased. And costs a lot.

As described above, when the speed of the elevator is further increased, the conventional structure using the elastic body 10 is insufficient, and it is difficult to improve the machining accuracy and installation accuracy of the guide rail 1. Therefore, lateral vibration cannot be sufficiently suppressed.

The present invention has been made in view of the above circumstances, and provides an elevator capable of reducing the vibration of the elevator cab with a lightweight device and at a low cost, while further reducing the lateral vibration generated during traveling as compared with the conventional case. The purpose is to

[0009]

In order to achieve the above object, the invention according to claim 1 has a roller guide at a desired position of a car frame and is supported in the car frame through a vibration isolator. A displacement detecting means for detecting a displacement of the roller guide in an elevator configured to be able to move up and down in a state where a car composed of a car room is in contact with a guide rail arranged in a hoistway, and the car room. Acceleration detection means for detecting the acceleration of

An actuator which is arranged between the car room and the car frame, is composed of a piezoelectric element group in which a plurality of piezoelectric elements are stacked in multiple layers, and is capable of moving the car room laterally, And a means for moving the actuator according to an acceleration signal detected by the acceleration detecting means.

In order to achieve the above-mentioned object, the invention according to claim 2 has a car guide having a roller guide at a desired position of a car frame and comprising a car room supported by a vibration isolator in the car frame. In an elevator configured to be able to move up and down in a state where a car is in contact with a guide rail arranged in a hoistway, a displacement detecting means for detecting a displacement of the roller guide, and an acceleration for detecting an acceleration of the cab. Detection means,

An actuator which is arranged between the car room and the car frame, is composed of a piezoelectric element group in which a plurality of piezoelectric elements are stacked in multiple layers, and is capable of moving the car room laterally, One end of the car frame is rotatable about a fulcrum, and the other end is moved between the actuator and the cab, and the actuator is moved according to an acceleration signal detected by the acceleration detecting means. And an elevator.

[0013]

According to the invention according to claim 1, when the guide rail track is bent and the roller guide is displaced and the car is vibrated, the vibration is predicted from the car frame to the car room. The actuator acts so as to cancel the vibration transmitted to the. In addition, the acceleration detection means,
The vibration generated in the cab can be detected, and the acceleration generated in the cab can be canceled by applying a voltage to the piezoelectric element group and moving the actuator according to the lateral acceleration generated in the cab. Vibration generated in the cab can be further reduced.

According to the invention corresponding to claim 2, in addition to the effect of claim 1, since the link mechanism is provided, the displacement amount of the piezoelectric element group is amplified. Therefore, the number of laminated piezoelectric elements is correspondingly increased. It is possible to reduce the cost and reduce the cost.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a first embodiment of an elevator according to the present invention, and the points different from the conventional example of FIG. 5 will be described. That is, the roller guides 3a, 3b, 3c, 3d are attached to the car frame 4, and the displacement sensors 12a, 12b, 12 are respectively attached to the roller guides 3a-3d.
c and 12d are provided so that the displacement generated by the bending of the guide rail 1 can be detected. Further, an accelerometer 9 is provided in the car room 5 so that the acceleration generated in the car room 5 can be detected.

Further, on both side surfaces of the car room 5 and the car frame 4, a piezoelectric element group 7 in which a plurality of piezoelectric elements are stacked in multiple layers is formed.
Are provided as follows. The piezoelectric element group 7 is
The cab 5 which constitutes an actuator and is provided with an elastic body 13
And both ends thereof are fixed to the car room 5 and the car frame 4, respectively. The car room 5 is supported on the car frame 4 via a rubber vibration isolator 6, and the car frame 4 and the car room 5 are supported.
And are capable of lateral relative movement. Therefore, by applying a voltage to the piezoelectric element,
The piezoelectric element expands and contracts, and the piezoelectric element group 7 stacked in multiple layers is
The car room 5 can be moved with respect to the car frame 4.

In such a structure, when the guide rail 1 has a bend in the track or when the cage chamber 5 is deflected due to an eccentric load, the roller guides 3a to 3d are displaced, and the cage 5 is moved. Vibration occurs. The actuator is moved so as to cancel the vibration transmitted to the car room 5 from the predicted cage frame 4 of this vibration. In addition, the accelerometer 9 attached to the car room 5 also detects the vibration generated in the car room 5. By applying a voltage to the piezoelectric element group 7 according to the lateral acceleration generated in the cab 5 and moving the actuator, the acceleration generated in the cab 5 can be canceled and the vibration generated in the cab 5 can be further reduced. be able to.

The operation of the elevator of the embodiment thus constructed will be described below. Roller guides 3a to 3d are guided by a guide rail 1 provided upright in a hoistway of a building to ascend and descend. Therefore, the roller guides 3a to 3d
Needs to be always in contact with the guide rail 1 and is pressed by the elastic body 10. Therefore, the guide rail 1 is bent due to the pressing force in addition to the bending at the time of mounting. Since the guide rail 1 is supported by the bracket 2, the load is like moving on the beams supporting both ends, and the amount of bending of the guide rail 1 varies depending on the location. Further, the pressing force of the roller guides 3a to 3d is not always constant, and when the load in the car room 5 has an unbalanced load, a large load is applied to the guide rail 1 on one side. At this time, the bending of the guide rail 1 is
It gets even bigger. Although the roller guides 3a to 3d are not directly attached to the car frame 4 but are attached to the car frame 4 through the elastic body 10, they cannot absorb all the vibrations, and the vibrations are caused by the roller guides 3a. ~ 3
It is transmitted from the car frame 4 to the car room 5.

FIG. 4 shows a block diagram of active vibration damping by the piezoelectric element group 7 in which a plurality of piezoelectric elements are stacked in multiple layers. The roller guide 3 (3a) for detecting the displacement transmitted by the bending of the guide rail 1 is shown. , 3b, 3c, 3d), the displacement gauges 12 (12a, 12b, 12c,
12d), an accelerometer 9 provided in the car room 5 for detecting lateral vibration of the car room 5, an actuator including a piezoelectric element group 7, and a cage frame vibration control device that controls the operation amount of the actuator from the detected value. 15 and a cab vibration control device 16. Since the generated vibrations are mainly translational vibrations of the car room 5 and the car frame 4, the vibrations in the translational direction can be suppressed.

As the displacement data of the roller guide 3, two data on the left and right of the upper part of the car frame 4 or two data on the left and right of the lower part of the car frame 4 are used. When the car is raised, the roller guide 3a is used. , 3b are used, and when the car is descending, the displacement data of the roller guides 3c, 3d are used.
Predict the lateral vibration that occurs in.

When the elevator rises, the roller guide 3
From a, 3b, the relative displacement data obtained from the roller guides 3c, 3d at the time of descending is input to the control device and calculation is performed to predict the vibration generated in the car frame 4, and the value of the voltage required to suppress the vibration is calculated. It is determined.

Further, the accelerometer 9 provided in the car room 5 detects the lateral vibration generated in the car room 5. In the subtractor 17, the detected acceleration subtracts the detected acceleration from the value of the target acceleration (O), inputs the value to the cab vibration control device 16 and performs calculation to suppress vibration of the cab. The required voltage value is determined. The value of the voltage output to the piezoelectric element group 7 is determined by adding this voltage and the voltage value of the car frame vibration control device 15 by the adder 18. The lateral vibration obtained by the determined voltage value and the vibration transmitted from the vibration isolating rubber 6 of the car frame 4 are subtracted by the subtractor 1
It is subtracted by 9 and given to the cab 5.

In this case, the piezoelectric element group 7 includes the control device 15,
The vibration of the cab 5 can be suppressed by expanding and contracting according to the input signal from the cab 16, and the vibration of the cab 5 can be targeted acceleration (O).
Get closer to.

Further, since the acceleration signal provided in the car room 5 is fed back, it has an effect of attenuating the vibration generated in the natural frequency range of the car room 5, and the lateral vibration generated in the car room 5 is reduced. It can be reduced and the riding comfort of the car is improved.

The piezoelectric element group 7 is directly connected to the car frame 4 and the car room 5.
When they are combined with each other, they are restrained by the actuator, and the vibration in the high frequency region that cannot be controlled by the actuator is directly transmitted from the car frame 4 to the car room 5. Therefore, the elastic body 13 is provided between the cab 5 and the piezoelectric element group 7. Further, since the piezoelectric element is weak against the tensile force, care must be taken, and it also has a role of absorbing when the tensile force is generated in the piezoelectric element. This control is performed from when the elevator stops at a certain floor to when it goes up and down and stops at the next floor.

The equipment required for active damping is a displacement gauge 1
2. Accelerometer 9, car frame vibration control device 15, cab room vibration control device 16, and piezoelectric element group 7 are all that is required, so the weight is light and the entire elevator device can be changed by providing the control devices 15 and 16. unnecessary.

As described above, according to the embodiment of the present invention, the vibration generated in the elevator can be reduced with a lightweight device and at low cost, and the riding comfort of the car can be further improved.

FIG. 2 shows a second embodiment of the present invention, in which a piezoelectric element group 7 for moving the cab 5, that is, a piezoelectric element group 7 in which a plurality of piezoelectric elements are stacked in a multi-layer structure is provided with a link mechanism 8. FIG. 7 is a schematic diagram of an elevator that is provided with a mechanism that amplifies the displacement amount of the piezoelectric element group 7 by utilizing the mechanism. FIG. 3 is an enlarged view of a part of FIG. 2, in which the link mechanism 8 is provided at the bottom of both ends of the car frame 4.
Is provided so that the car frame 4 can rotate about a fulcrum on the car frame 4 side. Then, the piezoelectric element group 7
Is attached to the intermediate portion of the link mechanism 8 without being directly fixed to the cab 5. When a predetermined voltage signal is input to the piezoelectric element group 7, the piezoelectric element group 7 expands and contracts in response to it, and the displacement amount is the distance L1 between the action point of the piezoelectric element group 7 and the rotation fulcrum 11, Point of action on cab 5 and rotation fulcrum 1
The ratio L2 / L1 of the distance L2 between 1 is amplified by the link mechanism 8 and transmitted to the cab 5, and is moved in the lateral direction. Therefore, the number of stacked piezoelectric element groups 7 can be small, and the cost can be reduced. Further, since the link mechanism 8 is composed of the elastic body 6, the link mechanism 8 can absorb the high frequency component whose vibration cannot be suppressed by the actuator.

As described above, according to the present invention, the vibration generated in the elevator can be reduced with a lightweight device and at a minimum cost, and the riding comfort of the car can be further improved.

[0030]

According to the present invention described above, even if vibrations due to the bending at the time of mounting the guide rail and the bending of the guide rail due to an unbalanced load of the load accompanying the speed increase, It is possible to provide an elevator that can further reduce vibrations and thus can improve riding comfort with a simple structure.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an elevator of the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of the elevator of the present invention.

FIG. 3 is an enlarged view of a part of FIG.

FIG. 4 is a block diagram for explaining the function and effect of the embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a conventional elevator.

[Explanation of symbols]

1 ... Guide rail, 2 ... Bracket, 3a, 3b, 3
c, 3d ... roller guide, 4 ... car frame, 5 ... car room, 6
... Anti-vibration rubber, 7 ... Piezoelectric element group stacked in multiple layers, 8 ... Link, 9 ... Accelerometer, 10 ... Elastic body, 11 ... Rotation fulcrum,
12a, 12b, 12c, 12d ... Displacement meter, 13 ... Elastic body.

Claims (2)

[Claims] 1. A car comprising a car room having a roller guide at a desired position of a car frame and supported by a vibration isolator in the car frame contacts a guide rail arranged in the hoistway. In an elevator configured to be able to move up and down in a contact state, a displacement detection unit that detects displacement of the roller guide, an acceleration detection unit that detects acceleration of the car room, and a space between the car room and the car frame. An actuator that is arranged in a plurality of piezoelectric elements and is formed by stacking a plurality of piezoelectric elements in a multi-layer, and that can move the cab in the lateral direction, and the actuator according to the acceleration signal detected by the acceleration detecting means. An elevator having means for moving an actuator. 2. A car comprising a car room having a roller guide at a desired position of the car frame and supported by a vibration isolator in the car frame contacts a guide rail arranged in the hoistway. In an elevator configured to be able to move up and down in a contact state, a displacement detection unit that detects displacement of the roller guide, an acceleration detection unit that detects acceleration of the car room, and a space between the car room and the car frame. And an actuator that is composed of a piezoelectric element group in which a plurality of piezoelectric elements are stacked in multiple layers and that can move the car chamber laterally, and one end of the car frame is rotatable about a fulcrum. And a means for moving the actuator according to an acceleration signal detected by the acceleration detecting means, the link mechanism having the other end contacting between the actuator and the cab. beta.