CN104229604A - Elevator equipment - Google Patents

Abstract

Solving the problem in elevators with compensating pulleys that as the travel of the elevator becomes longer, the elasticity of the slings decreases, which leads to an increase in the amplitude of the slings and a decrease in the natural frequency of vibrations of the slings, whereby the attenuation effect of the damper becomes weaker , The up and down vibration of the compensation pulley device increases, and the resulting up and down vibration of the elevator car deteriorates the ride comfort of the elevator. In an elevator installation having a compensating sheave arrangement for compensating the mass balance of the main rope suspending the elevator car and the counterweight according to the position of the elevator installation's car and the counterweight, an actuator arrangement and a link mechanism arrangement are provided , when the compensation pulley vibrates up and down, the actuator device applies a pushing force to the guide rail to increase the friction between the compensation pulley and the guide rail, thereby improving the damping effect, and the linkage mechanism device causes the actuator device to The displacement in the horizontal direction is converted into the displacement in the up and down direction of the compensation pulley.

Description

elevator equipment

technical field

The invention relates to an elevator installation with a compensating pulley arrangement with compensating pulleys and compensating ropes.

Background technique

Generally speaking, the elevator equipment consists of a sheave installed on the output shaft of the winch, a main rope wound on the sheave, an elevator car suspended by the main rope and controlled by the speed of the hoist, and a hoist suspended on the main A counterweight on the sling and having a mass equal to that of the elevator car. In the bucket-type elevator equipment described above, the lifting and lowering of the elevator car is controlled, and the actual load on the motor is reduced by keeping the masses on the side of the elevator car and the side of the counterweight in balance.

As the stroke of the elevator becomes longer, the mass ratio occupied by the main rope changes due to the position of the elevator car, resulting in an imbalance and a change in the actual load of the hoist. In order to control the load fluctuation of the above-mentioned hoisting machine to a minimum, a compensation pulley device with a compensation rope and a compensation pulley is provided. The pulley is used to apply tension to the compensating rope.

In order to apply tension to the compensation rope whose length changes due to temperature and aging, the compensation pulley adopts a structure that is not fixed to the building but is suspended by the compensation rope. The frictional force between the sliding parts on the pulley attenuates the vertical vibration of the compensation pulley.

In elevator equipment, the up and down vibration mode depends on factors such as the elasticity of the main sling and the compensation rope, the rotational inertia of the hoist, the quality of the elevator car and the counterweight, the quality of the compensation pulley device and the rotational inertia of its rotating part, etc., in some In the up and down vibration mode, the speed control system of the hoist will become unstable, resulting in vibration, which may adversely affect the ride comfort of the elevator equipment.

In the existing elevator equipment, the attenuation of the up and down vibration of the compensating pulley only depends on the friction between the compensating pulley and the guide rail. The up and down vibration of the cabin increases. As a prior art, Patent Document 1 discloses a structure related to a device for attenuating up and down vibration of a compensating pulley, which is provided with a damper independently damping each pulley by a mechanism using two compensating pulleys , to reduce vibration by moving the elevator car and counterweight in phase or in opposite phase.

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 6-211463

Summary of the invention

The problem to be solved by the invention

In Patent Document 1, with respect to the vibration caused by the elevator car and the counterweight, the vertical vibration is reduced by a damper provided on the compensating pulley. However, as the stroke of the elevator becomes longer, the elasticity of the rope decreases and the natural vibration frequency of the rope decreases, and the attenuation effect of the damper becomes weak, making it impossible to reduce the vertical vibration of the compensating pulley. In addition, in the structure of Patent Document 1, when the elasticity of the rope decreases as the stroke of the elevator becomes longer, it is necessary to increase the stroke of the damper or increase the size of the mechanism in order to cope with the increase in the amplitude of the rope. . Moreover, when the amplitude of the generated sling vibration exceeds the stroke of the damper, there is a problem that the compensation pulley mechanism itself will vibrate up and down, resulting in the problem that the vibration-damping mechanism cannot perform the vibration-damping function.

Contents of the invention

It is an object of the present invention to suppress vertical vibrations generated in an elevator car by suppressing vibrations generated in compensating pulleys in long-travel elevators, thereby achieving comfortable ride quality in the elevators.

solution

The elevator equipment of the present invention has a compensating pulley device that lifts and lowers the elevator car and the counterweight suspended by the main sling through the winch, and has a compensating pulley and a bottom connected to the lower part of the elevator car and the counterweight. Compensating ropes, the compensating sheave device guides the sliding of the compensating sheave along the guide rail, the elevator installation is characterized in that an actuator device applying a pushing force is provided on the compensating sheave device, and the pushing force is used to increase The frictional force in the direction perpendicular to the guide rail, in addition, a link mechanism that converts the displacement of the actuator device into the displacement of the compensation pulley in the direction of the guide rail is provided between the compensation pulley and the actuator device.

Invention effect

According to the invention, the elevator installation has a compensating pulley arrangement which raises and lowers the elevator car suspended by the main ropes and the counterweight via the winch, and has a compensating pulley and a connection to the lower part of the elevator car and the lower part of the counterweight Compensating ropes, the compensating pulley device guides the sliding of the compensating pulley along the guide rail, in the elevator equipment, an actuator device that applies a pushing force is provided on the compensating pulley device, and the pushing force is used to increase and The friction force in the direction perpendicular to the guide rail, in addition, a link mechanism for converting the displacement of the actuator device into the displacement of the compensation pulley in the direction of the guide rail is provided between the compensation pulley and the actuator device. Thereby, the frictional force between the guide rail and the compensation pulley can be increased, and the vertical vibration of the compensation pulley can be reduced. In addition, the horizontal displacement of the actuator is converted into the displacement of the compensation pulley in the up and down direction by using the link mechanism to attenuate the up and down vibration of the compensation pulley, thereby effectively reducing the vibration of the compensation pulley device and reducing the The up and down vibration of the elevator car excited by the up and down vibration of the compensation pulley device can make the elevator equipment have a comfortable ride.

Description of drawings

Fig. 1 is a schematic diagram showing the overall configuration of an elevator system according to a first embodiment of the present invention.

Fig. 2A is a front view showing the structure of the compensation pulley device in the first embodiment.

Fig. 2B is a side view showing the structure of the compensation pulley device in the first embodiment.

Fig. 3 is a perspective view showing the structure of the actuator device in the first embodiment.

FIG. 4 is a block diagram showing a circuit configuration of a control unit in the first embodiment.

Fig. 5A is an explanatory diagram for explaining the operation of the compensating pulley device in the first embodiment.

Fig. 5B is an explanatory diagram for explaining the operation of the compensating pulley device in the first embodiment.

Fig. 5C is an explanatory diagram for explaining the operation of the compensating pulley device in the first embodiment.

Fig. 5D is an explanatory diagram for explaining the operation of the compensating pulley device in the first embodiment.

Fig. 6 is a schematic diagram showing an overall configuration of elevator equipment according to a second embodiment of the present invention.

Fig. 7A is a front view showing the structure of the compensation pulley device in the second embodiment.

Fig. 7B is a side view showing the structure of the compensating pulley device in the second embodiment.

Fig. 8 is a perspective view showing a compensating pulley device in a second embodiment.

FIG. 9 is a block diagram showing a circuit configuration of a control unit in the second embodiment.

Fig. 10A is a schematic diagram showing changes in the sling due to the operation of the device in the second embodiment.

Fig. 10B is a schematic diagram showing changes in the sling due to the operation of the device in the second embodiment.

The reference signs are explained as follows:

2 main slings

3 counterweight

4 compensating rope

5 compensation pulley

6 elevator cars

7 rails

50 compensation pulley device

51, 52 boot boots

53 Actuator device

55 connecting rod

56 compensation pulley frame

81 Actuator support

82 linear actuator

91 auxiliary pulley

92 auxiliary pulley frame

100, 101 Elevator equipment

200, 300 Actuator control unit

201, 301 Sensor Department

202 position sensor

203 Displacement signal conversion unit

210, 310 Moment calculation department

211, 311 target value generator

212, 312 gain compensator

213, 313 adder

220, 320 drive control department

302 Rotation angular velocity detector

303 Rotation angular velocity conversion unit

Detailed ways

The present invention is described below with reference to examples and drawings.

first embodiment

A first embodiment of the present invention will be described below. Fig. 1 is a schematic diagram showing the overall configuration of an elevator system according to a first embodiment of the present invention.

As shown in FIG. 1 , in an elevator system 100 , an elevator car 6 and a counterweight 3 are connected to a sheave 1 attached to an output shaft of a hoist (not shown) via a main rope 2 . 50 denotes a compensating pulley device, and the compensating rope 4 for compensating the weight change of the main rope 2 due to the position change of the elevator car 6 is connected to the lower side of the elevator car 6 and the counterweight 3 via the compensating pulley 5 . 51 and 52 indicate guide shoes slidably guided by the guide rail 7, 53 indicates an actuator device, and 56 indicates a compensating pulley frame. 55 denotes a link connecting the actuator device 53 and the compensating pulley frame 56 , 200 denotes an actuator control unit, and 202 denotes a position sensor of the compensating pulley 5 . F represents the building floor.

Fig. 2A is a front view showing the structure of the compensating pulley device in the first embodiment, and Fig. 2B is a side view showing the structure of the compensating pulley device. The compensating pulley 5 is suspended by the compensating rope 4 , and the compensating pulley 5 is provided so as to be able to move in the vertical direction via the guide rail 7 in order to deal with expansion and contraction of the compensating rope 4 . At this time, the compensating pulley 5 and the guide rail 7 are guided by the guide shoe 51 . The guide shoe 51 is attached to a compensation pulley frame 56 having a shaft of the compensation pulley 5 . The link 55 is provided between the compensation pulley frame 56 and the actuator device 53 via shafts 70 and 71 , and is rotatably supported by the shafts 70 and 71 . The actuator device 53 connected to the link 55 has an actuator support portion 81 and a linear actuator 82 , and is guided vertically by the guide rail 7 via the guide shoe 52 .

FIG. 3 is a perspective view showing the detailed structure of the actuator device 53 in the first embodiment. The shaft 71 connected to the link 55 is supported by the actuator support portion 81 . The linear actuator 82 is attached between the actuator support portion 81 and the guide shoe 52 along a direction perpendicular to the guide rail 7 , and can be flexibly displaced by electromagnetic force. In FIG. 3 only a group of actuator devices 53 engaged with the guide rail 7 on the front side of the device is shown.

FIG. 4 is a block diagram showing the circuit configuration of the actuator control unit 200 in the first embodiment. In FIG. 4, arrowed lines indicate signal lines. The actuator control unit 200 has a sensor unit 201 , a torque calculation unit 210 , and a drive control unit 220 .

In the sensor unit 201, the position sensor 202 detects the position of the compensating pulley frame 56 in the vertical direction, and outputs the driving torque to the linear actuator 82 according to the output of the sensor unit 201, and the position sensor 202 measures the position of the compensating pulley frame 56. The distance from the building floor F is used to detect the moving distance due to vibration, and the position signal is converted into a digital signal by the position signal conversion unit 203 .

In the torque calculation part 210, the output of the position signal conversion part 203 is multiplied by the gain by the gain compensator 212, and the output is combined with the output of the target value generator 211 to compensate the target position of the pulley frame 56 by the adder 213. add up. The difference from the target position is input to the drive control unit 220 as a command value. Thereafter, the linear actuator 82 is driven according to the torque obtained by the drive control unit 220 .

5A to 5D are explanatory diagrams explaining the operation of the compensating pulley device in the first embodiment. The distance between the compensating pulley frame 56 and the floor surface F of the building is detected by the position sensor 202 attached to the compensating pulley frame 56 . The actuator device 53 is configured to be controlled based on information output from the position sensor 202 and driven toward the guide rail, thereby applying a pressing force to the guide rail 7 .

As shown in FIG. 5A , when the compensating pulley 5 is raised, the linear actuator 82 is driven in the direction of the guide rail 7 . Thereby, as shown in FIG. 5B , the shaft 71 of the link on the side of the linear actuator 82 moves toward the guide rail 7 by the action of the link 55 , and the link 55 rotates about the shaft 71 . With this rotation, the compensating pulley frame 56 is pushed downward, whereby the rising of the compensating pulley 5 can be suppressed.

Conversely, as shown in FIG. 5C , when the compensating pulley 5 is lowered, the linear actuator 82 is driven in the opposite direction of the guide rail 7 . Thus, as shown in FIG. 5D , the shaft 71 of the connecting rod on the side of the linear actuator 82 moves in the opposite direction along the guide rail 7 under the action of the connecting rod 55 , and the connecting rod 55 moves in the opposite direction with the shaft 71 on the side of the linear actuator 82 . Rotate around the center. With this rotation, the compensating pulley frame 56 is lifted upward, whereby the descending of the compensating pulley 5 can be suppressed.

The damping effect of the compensating pulley device 50 can be enhanced by the pressing force toward the guide rail 7 generated by the driving of the linear actuator 82 , thereby making it possible to suppress vibration. In addition, by converting the driving force of the linear actuator 82 toward the guide rail through the link 55 into a driving force for driving the compensation pulley frame 56 and the compensation pulley 5 in the vertical direction, the compensation pulley can be reduced in size. 5 Vibration of its own up and down direction.

At this time, when the linear actuator 82 is driven in the direction of the guide rail 7, in order to increase the frictional force with the guide rail 7 in the pushing direction and the suction direction, the cross section of the guide shoe 52 mounted on the linear actuator 82 is It is formed in a U-shape so that pressing force against the guide rail 7 can be generated from two directions. In addition, in FIGS. 2 and 3 , for convenience of explanation, only the front actuator device 53 is shown, while the rear actuator device 53 has the same structure.

In the first embodiment, the case where a linear actuator is used as the actuator has been described, but as long as it is an actuator that can apply a pushing force to the rail, an actuator that moves linearly or a linear actuator may be used. A mechanism that converts a rotary actuator into a linear actuator. For example, hydraulic actuators, pneumatic actuators, ball screws or rack and pinion could also be used. Similarly, a vibration meter has been described as an example of a displacement meter, but an accelerometer, a speedometer, or the like may be used as long as the vibration of the compensation pulley can be detected.

As described above, according to the first embodiment, the actuator is used to increase the pressing force in the direction of the guide rail, whereby the damping effect of the vibration by the frictional force between the compensation pulley and the guide rail can be improved. Furthermore, the vertical vibration of the compensation pulley can be reduced by the link mechanism that converts the drive of the actuator in the direction of the rail to the drive of the compensation pulley in the vertical direction. In addition, through the function of the above-mentioned device, the vibration occurring in the compensating pulley 5 can be reduced, and the up and down vibration of the elevator car caused by the vibration of the compensating pulley 5 can be reduced, thereby improving the ride comfort of the elevator.

second embodiment

A second embodiment will be described below with reference to FIGS. 6 to 8 . Fig. 6 is a schematic view showing the overall structure of an elevator device 101 according to a second embodiment of the present invention, Fig. 7A is a front view showing the structure of a compensating pulley device in the second embodiment, and Fig. 7B is a view showing the second embodiment A side view of the structure of the compensating pulley device in FIG. 8 is a perspective view showing the compensating pulley device in the second embodiment.

6 to 8, the auxiliary pulley 91 is rotatably held on the auxiliary pulley frame 92, the compensation rope 4 is erected on the auxiliary pulley 91, and the linear actuator 82 of the actuator device 53 is connected to the guide rail 7. The auxiliary pulley frame 92 and the auxiliary pulley 91 are driven in the orthogonal direction, and the tension of the rope acting on the compensation rope 4 between the compensation pulley 5 and the auxiliary pulley 91 is changed, thereby changing the natural vibration of the compensation rope 4 frequency.

In this way, it is also possible to reduce the rope vibration caused by the anti-phase vibration between the elevator car 6 and the counterweight 3, and to reduce the rotational vibration generated on the compensating pulley 5, thereby reliably reducing the vibration of the elevator car. The up and down vibration of the compartment 6. 300 denotes an actuator control unit, and 302 denotes a rotation angle detector for detecting rotation of the auxiliary pulley 91 .

In addition, for the convenience of description, the same reference numerals are used for the common parts as those of the first embodiment, and the detailed description of the above parts will be omitted.

As shown in FIG. 6 , the auxiliary pulley frame 92 is provided with a shaft 71 connected to the link 55 . The auxiliary pulley 91 is arranged between the elevator car 6 and the compensation pulley 5 or between the counterweight 3 and the compensation pulley 5 .

As shown in FIGS. 7A , 7B, and 8 , the compensating rope 4 is erected between the compensating pulley 5 and the auxiliary pulley 91 . The auxiliary pulley 91 is provided so as to be able to contact the compensating rope 4 even when the displacement of the actuator reaches the maximum displacement within the driving range of the linear actuator 82 .

FIG. 9 is a block diagram showing a circuit configuration of a control unit in the second embodiment. The actuator control unit 300 has a sensor unit 301 , a torque calculation unit 310 , and a drive control unit 320 .

In the sensor unit 301 , the rotational angular velocity of the auxiliary pulley 91 is detected by the rotational angular velocity sensor 302 , and is converted into a digital signal by the rotational angular velocity signal conversion unit 303 . According to the output of the sensor part 301, the drive torque is output to the linear actuator 82 via the torque calculation part 310 and the drive control part 320. The rotation of the auxiliary pulley 91 during the vibration mode of vibration occurs in the opposite direction, and the signal of the rotation speed is converted into a digital signal.

The output of the rotation angular velocity signal conversion unit 303 is multiplied by the gain by the gain compensator 312 in the torque calculation unit 310 , and added to the target value of the target value generator 311 by the adder 313 . The rotation of the auxiliary pulley 91 is damped by inputting a command value to the drive control unit 320 and applying tension to the compensation rope 4 via the linear actuator 82 .

Fig. 10A and Fig. 10B are schematic diagrams showing changes in the sling due to the operation of the compensating pulley in the second embodiment. First, as shown in FIG. 10B , the linear actuator 82 is driven to shrink in the direction of the guide rail, thereby applying tension to the compensation rope 4 through the connecting rod 55, so that the natural frequency of the compensation rope 4 changes toward an increasing direction, so that The natural vibration frequency of the compensation rope is offset from the vibration frequency of the vibration of the compensation rope, thereby making it difficult for the vibration to propagate.

On the other hand, as shown in FIG. 10A , the linear actuator 82 is extended and driven in the direction opposite to the guide rail, the tension of the compensating rope 4 is decreased, and the natural frequency of the compensating rope 4 is changed toward a decreasing direction. This makes it difficult for the vibrations of the compensating rope to propagate.

In addition, by using the auxiliary pulley 91, for example, when the compensation rope 4 is lowered, when the actuator raises the compensation pulley 5, even if the auxiliary pulley 91 reaches the maximum contraction amount, the compensation rope 4 can be pushed, so that it can be continuously By applying tension to the compensating rope 4 , the function originally assumed by the compensating pulley 5 can be exerted, that is, the tension load can be continuously applied to the compensating rope 4 .

As described above, according to the second embodiment, in addition to increasing the frictional force between the compensation pulley and the guide rail 7 by the linear actuator 82 and displacing the compensation pulley 5 up and down, by using the auxiliary pulley 91, it is also possible to The tension of the compensating rope 4 between the auxiliary pulley 91 and the compensating pulley 5 is controlled. Thus, the natural vibration frequency of the compensation rope 4 located between the auxiliary pulley 91 and the compensation pulley 5 can be changed, so that the vibration of the compensation rope 4 is difficult to propagate, and by reducing the vibration that causes the rotation vibration of the auxiliary pulley 5, it is possible to further effectively Reducing the up and down vibration of the elevator car can further improve the ride comfort of the elevator.

Claims (13)

1. A kind of elevator equipment, it has compensating pulley device, and described compensating pulley device makes the suspended elevator car of main sling and counterweight lift by winch, and has compensating pulley and the bottom of described elevator car and The compensation rope connected to the lower part of the balance weight, the compensation pulley device guides the sliding of the compensation pulley along the guide rail, The elevator installation is characterized in that, The compensation pulley device is provided with an actuator device that generates a damping force for attenuating the vertical vibration of the compensation pulley in order to reduce the vertical vibration of the compensation pulley. 2. Elevator installation according to claim 1, characterized in that As the actuator device, there is provided an actuator device that applies a urging force for increasing the friction force in a direction perpendicular to the guide rail, and between the compensation pulley and the actuating pulley. A linkage mechanism is provided between the actuator devices to convert the displacement of the actuator device into the displacement of the compensating pulley in the direction of the guide rail. 3. Elevator installation according to claim 1 or 2, characterized in that The elevator installation has a sensor for detecting the vibration of the compensating sheave and an actuator control unit that drives the actuator device to increase the distance between the compensating sheave and the compensating sheave. friction between the guide rails, thereby damping the vibration of the compensating pulley assembly. 4. Elevator installation according to any one of claims 1 to 3, characterized in that The compensation pulley device has a compensation pulley frame that rotatably supports the compensation pulley. 5. Elevator installation according to any one of claims 1 to 4, characterized in that The actuator device includes a brake shoe engaged with the guide rail and an actuator connected to the brake shoe. 6. Elevator installation according to claim 5, characterized in that The actuator device has an actuator support portion that supports the actuator. 7. Elevator installation according to claim 5, characterized in that The actuator device has a linear actuator provided between the brake shoe and the actuator device so as to be able to expand and contract. 8. Elevator installation according to any one of claims 1 to 7, characterized in that One end of the link mechanism is rotatably pivotally supported by the actuator device, and the other end of the link mechanism is rotatably pivotally supported by the compensation pulley. 9. Elevator installation according to any one of claims 1 to 7, characterized in that The compensating pulley device has an auxiliary pulley which, by displacement of the actuator device, applies tension to the compensating cable, thereby damping rotational vibrations of the compensating cable. 10. Elevator installation according to claim 9, characterized in that The auxiliary pulley is rotatably pivotally supported by the actuator device. 11. Elevator installation according to claim 10, characterized in that The auxiliary pulley is rotatably pivotally supported by an auxiliary pulley frame provided on the actuator device. 12. Elevator installation according to any one of claims 9 to 11, characterized in that The tension of the compensating rope can be varied by driving the auxiliary pulley in a direction orthogonal to the guide rail by the actuator device. 13. Elevator installation according to claim 12, characterized in that The compensation pulley and the auxiliary pulley are connected through the link mechanism, and the compensation pulley is displaced along the guide rail through the opening and closing action of the actuator device in a direction perpendicular to the guide rail .