JPH0742065B2 - Elevator car support equipment - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car support device, and more particularly to a vibration-proof support structure for preventing vibration of a hoisting machine or an electric motor from being transmitted to an elevator car through main ropes.

[Prior art]

A semiconductor converter such as a variable voltage variable frequency (VVVF) system or a thyristor Leonard system is used for speed control of the motor of an elevator hoisting machine. In this case, from the electric motor, minute vibration and annoying magnetic noise are generated in accordance with the control of the voltage and frequency supplied to the electric motor. The fundamental frequency of such vibrations and noise is, for example, 6
In the case of the pulse type thyristor Leonard system, it is 6 times the power supply frequency, and in the VVVF system by the pulse width modulation system, it is twice the carrier frequency. Therefore, in an elevator using a hoisting machine as described above, even if the machine room in which the hoisting machine is installed has a sound-insulating structure, it is suspended mechanically adjacent to the living room or to the main rope suspended from the machine room. Vibration and noise of the hoisting machine are propagated through the building beams to the elevator car that can be lowered, which causes discomfort to the occupants. FIG. 7 shows a conventional elevator hoist supporting device having a function of preventing the above-mentioned vibration. In the figure, 1 is a hoistway, 2 is a machine room formed on the hoistway 1, and on a machine table 6 supported by a receiving beam 5 embedded by cinder concrete 4 on a floor 3 of the machine room 2. A base 8 is installed via a vibration-proof rubber 7, and a hoisting machine 9 is installed on the base 8. The hoisting machine 9 includes a motor 9a whose speed is controlled by a conversion means such as a variable voltage variable frequency (VVVF) system or a thyristor Leonard system, a gear type speed reducer 9b that reduces the speed of the motor 9a, and the speed reducer 9b. It is composed of a sheave 9c rotated by and a brake. Reference numeral 10 is a deflector wheel attached to the machine base 6. The deflector wheel 10 and the sheave 9c are main ropes.
11 is wound, and both ends thereof are suspended in the hoistway 1 to suspend the elevator car 15. First, a car frame 15a is hung on the main ropes 11, and a car room 15b is supported via an elastic body 15c provided on the car frame 15a. The car frame 15a has an inverted T-shape as shown in the figure, and an elastic body 15c provided on the bottom side supports the underfloor 15d of the car room 15b located above the elastic body 15c to support the weight. It is supposed to do. Further, a micro switch 15e for detecting the amount of bending of the elastic body 15c is provided, and the detection result is transmitted to the machine room 2 via a cable (not shown). Incidentally, 16 is a hanging weight.

[Problems to be Solved by the Invention]

In the conventional elevator car support device configured as described above, since the electric motor 9a is controlled by the VVVF method, the thyristor Leonard method, or the like, minute vibration or annoying noise is generated from the electric motor 9a. The fundamental frequency of this vibration or noise is determined by the method, and is, for example, 6 times the power supply frequency in the 6-pulse thyristor Leonard method, and is twice the carrier frequency in the VVVF method using the PWM modulation method. In addition, vibration and noise are generated from the gears of the hoisting machine 9. Although these vibrations are transmitted to the car frame 15a through the main ropes 11 and are damped to some extent by the elastic body 15c, it cannot be prevented that vibrations that cannot be damped are transmitted to the elevator cab 15b. The present invention solves the above problems, and an object of the present invention is to provide a support device that can more efficiently prevent vibration from being transmitted to the elevator cab through the main ropes 11.

[Means for solving problems]

The present invention is made in an elevator car in which a car room is supported by a car frame suspended from a main rope via an elastic body, and a high temperature superconductor is provided on one side between the car frame and the car room. , An electromagnet is arranged on the other side to face each other,
Provided with a control means for exciting this electromagnet only while traveling,
The elastic body is arranged so that the elastic body supports the weight of the cab only when the electromagnet is not excited.

[Action]

Since the elevator cab can be magnetically levitated by utilizing the repulsive force between the high-temperature superconductor and the electromagnet, it is possible to more efficiently perform vibration isolation as compared with the conventional support structure using only the elastic body.

【Example】

A first embodiment of the present invention is shown in FIG. The same parts as those of the conventional FIG. 7 are designated by the same reference numerals and the description thereof will be omitted. On the elastic body 15c provided on the bottom side 15f of the car frame 15a, the high temperature superconductor 100 having a substantially V-shaped groove structure is arranged. The high temperature superconductor 100 is formed from an oxide such as (YBa) ₃ Cu ₂ O ₇ or an organic material. An electromagnet 101 is arranged on the underfloor of the elevator cab 15b so as to face the high temperature superconductor 100. The electromagnet 101 has a size that fits approximately in the V-shaped groove, and has a size such that a constant gap can be formed. The electromagnet 101 is controlled by a control unit (not shown).
Excited only when the elevator car is running. When the elevator car is not running, the electromagnet 101
Is not excited and is in contact with the substantially V-shaped groove formed of the high temperature superconductor 100, and the weight of the cab 15b is supported by the elastic body 15c. That is, since the vibration from the hoisting machine 9 is not transmitted when the vehicle is not traveling, it is not necessary to magnetically levitate the cab 15b. In addition, immediately before traveling, the amount of bending of the elastic body 15c is detected by the micro switch 15e, the weight of the passenger in the cab is measured, and the electric motor 9a is measured using the measurement result.
Must be controlled to smoothly accelerate and decelerate. When the elevator car starts running, the electromagnet 101 is excited by the control means (not shown), and the high temperature superconductor 10 is applied to the electromagnet 101.
Repulsive force is exerted by magnetism from the three inner walls of the substantially V-shaped groove of 0, and the cab 15b is stably floated. Next, a second embodiment of the present invention is shown in FIG. In the first embodiment, it is assumed that the critical temperature of the high temperature superconductor is higher than the set temperature of the supporting device which is the magnetic levitation device, and no means for cooling the high temperature superconductor is provided. However, when the critical temperature of the high-temperature superconductor 100 is lower than the set temperature of the device, the high-temperature superconductor 100 is cooled by a cooling pipe 102 through which a cryogen such as liquid nitrogen is passed, is supported by a heat insulating support material 103, and is a sealed container. It is also possible to seal in the vacuum space 105 by 104. Another cooling means is shown in the third embodiment shown in FIG. The same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. By embedding the high temperature superconductor 100 and the cooling pipe 102 in the heat insulating material 106 such as expanded polystyrene, the sealed container 104 as shown in FIG. 2 can be eliminated. FIG. 4 shows a fourth embodiment of the present invention. In FIG. 1, the high-temperature superconductor 100 has a substantially V-shaped groove structure to prevent the cab 15b from moving laterally in the drawing, but this movement is the fourth.
It is also possible to prevent this by providing a pair of high temperature superconductors 100 having L-shaped end faces as shown in the figure as a left-right pair. In order to prevent the cab 15b from moving in the direction perpendicular to the drawing in FIGS. 1 and 4, the high temperature superconductor 100 has a pot structure or a high temperature superconductor 100 having a substantially V-shaped structure. It is conceivable to make the directions of the left and right grooves at right angles. Further, in FIG. 1, the high temperature superconductor 100 is arranged in the car frame 15a via the elastic body 15c, but in another embodiment, the electromagnet 101 is arranged via the elastic body. It is also possible to arrange it on the car room side 15b. Further, both elastic bodies can be arranged at the same time. Further, in FIG. 1, it is possible to arrange the high temperature superconductor 100 and the electromagnet 101 upside down. Also at this time, the elastic body can be provided on either one or both. FIG. 5 shows a fifth embodiment of the present invention. In FIG. 1, the set of the high temperature superconductor 100 and the electromagnet 101 and the elastic body 15c are arranged in series, so to speak, but they may be arranged in parallel as shown in FIG. At this time, the size of the elastic body 15c and the size and arrangement of the gap between the high temperature superconductor 100 and the electromagnet 101 are calculated so that the elastic body 15c supports the weight of the cab 15b only when the electromagnet 101 is not excited. With such a structure, the vertical dimension of the supporting device can be reduced. FIG. 6 shows a sixth embodiment of the present invention. In the above embodiment, the set of the high temperature superconductor 100 and the electromagnet 101, and the elastic body
15c was provided on the bottom side 15f of the car frame 15a. However, the present invention is not limited to such a structure,
For example, as shown in FIG. 6, a high temperature superconductor 100 and an electromagnet 1
It is also possible to place the 01 set above the cab 15b. That is, the car frame 15a has not only the bottom 15f but also the top 15g.
A high temperature superconductor 100 having a substantially V-shaped groove structure is provided on the upper side 15g, and an inverted L-shaped support member 15h is provided from the cab 15b so as to cover the high temperature superconductor 100 above. An electromagnet 101 is arranged below the supporting member 15h, and faces the high temperature superconductor 100 with a certain clearance dimension. On the other hand, the elastic body 15c is provided on the bottom side 15f of the car frame 15a as in the above-described embodiment. In the sixth embodiment, a set of the high temperature superconductor 100 and the electromagnet 101 is provided on the upper side 15g of the car frame 15a and an elastic body 15c is provided on the bottom side 15f, but the positional relationship between the two can be reversed. Is.

【The invention's effect】

As described above, according to the present invention, the high-temperature superconductor and the electromagnet have a vibration-proof structure in which the elevator cab is levitated by the repulsive force repulsed by magnetism. To be prevented.

[Brief description of drawings]

FIG. 1 is a schematic side view showing the first embodiment of the present invention, and FIG.
FIG. 4 is an enlarged view of an essential part showing the same second embodiment, FIG. 3 is an enlarged view of an essential part showing the same third embodiment, FIG. 4 is a schematic side view showing the same fourth embodiment, and FIG. FIG. 6 is a schematic side view showing a fifth embodiment, FIG. 6 is a schematic side view showing the sixth embodiment, and FIG. 7 is an overall configuration diagram showing a conventional elevator hoisting machine and a supporting device. 11 …… Main rope, 15a …… Car frame, 15b …… Car room, 15c ……
Elastic body, 15d …… under floor, 15e …… micro switch, 15f
…… Bottom, 15g …… Top, 15h …… Supporting member, 100 …… High temperature superconductor, 101 …… Electromagnet, 102 …… Cooling pipe, 103
...... Insulation support material, 104 ...... sealed container, 105 ...... vacuum space,
106 ... Insulation material. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (3)

[Claims] 1. In an elevator car in which a car room is supported by a car frame suspended from a main rope via an elastic body, a high-temperature superconductor is provided on one side between the car frame and the car room and the other side thereof. A control means for arranging the electromagnet to face each other and exciting the electromagnet only while traveling is provided, and the elastic body is arranged so that the elastic body supports the weight of the cab when the electromagnet is not excited. Elevator car support device. 2. The elevator car supporting apparatus according to claim 1, wherein the high-temperature superconductor or the electromagnet is arranged on the car frame side or the car room side via an elastic body. 3. The elevator car supporting apparatus according to claim 1, wherein the high-temperature superconductor has a structure cooled by a cooling pipe and supported by heat insulating means.