JP2002338170A - Elevator car power supply - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an elevator car power supply device capable of reducing the influence of electromagnetic waves on equipment. A power supply means for generating an AC voltage, and power supply lines connected to the power supply means and arranged in a loop along the vicinity of a side surface of a guide rail via a bracket, are provided. Cores 10a and 10b and iron cores 10a and 10b provided on the side of the car 2 and facing the power supply line.
b, and a power receiving means 10 provided with coils 10 c and 10 d wound around b to generate an electromotive force.
a, 9b, the feed lines 9a, 9b
A part of the electromagnetic wave radiated from b is absorbed by the guide rail 4a, which is a magnetic material, so that scattering to the outside is suppressed. [Effect] Safety and reliability of equipment can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for an elevator car, and more particularly to an elevator car power supply device suitable for supplying electric power to a car from a power supply means on a building side in a non-contact manner.

[0002]

2. Description of the Related Art As a power supply device for supplying electric power from a power supply means on the building side to a moving body traveling along a traveling path, for example, an elevator hoistway, that is, a car, in a contactless manner, a predetermined AC A power supply means for generating a voltage, a power supply line connected to the power supply means for flowing a high-frequency current along the hoistway, an iron core provided in the car, facing the power supply line, and wound around the iron core; There is a power receiving means provided with a coil for generating electric power, wherein an electromotive force generated in the coil of the power receiving means is converted into a predetermined voltage by electromagnetic induction and supplied as electric power of the car.

[0003] As this type, for example, an elevator car power supply device described in JP-A-9-56088 can be mentioned.

[0004]

In the above-described conventional elevator car power supply apparatus, when a high-frequency current is supplied to the power supply line, an electromagnetic wave is generated from the power supply line. If the control device is installed near the power supply line, the electromagnetic wave may cause the door drive control device to malfunction, making it impossible to open and close the door. In addition, there is a problem that the electromagnetic waves transmit through the hoistway and cause noises in devices other than the elevator device, for example, a telephone device and a video device.

[0005] Further, due to the inclination of the car during running of the car or the swing of the power supply line, the gap between the power supply line and the iron core wound with the coil of the power receiving means fluctuates, and in some cases, the gap varies. A power supply line and the core may come into contact with each other. As described above, when the gap between the power supply line and the iron core fluctuates, there is a problem that the electromotive force of the secondary winding, that is, the coil of the iron core fluctuates and the output voltage becomes unstable. Further, when the power supply line and the iron core come into contact with each other, there is a problem that the power supply line is broken and power cannot be supplied to the car.

SUMMARY OF THE INVENTION The present invention has been made in view of such a situation in the prior art, and a first object of the present invention is to provide an elevator car power supply device capable of reducing the influence of electromagnetic waves on equipment. It is in.

It is a second object of the present invention to provide an elevator car power supply device capable of suppressing a fluctuation in a gap between a power supply line and an iron core.

[0008]

Means for Solving the Problems To achieve the first object, the invention according to claim 1 of the present invention comprises a power supply means installed on a building side to generate a predetermined AC voltage, A power supply line connected and extended into the hoistway, a core provided on the side of the car that moves up and down along the guide rail, facing the power supply line, and a coil wound around the iron core to generate an electromotive force are provided. And a power supply device for an elevator, the power supply line being arranged in a loop along the vicinity of the side surface of the guide rail.

According to the first aspect of the present invention, the power supply line to which the high-frequency current is supplied by the power supply is arranged in a loop along the vicinity of the side surface of the guide rail. Therefore, a part of the electromagnetic wave radiated from the power supply line is absorbed by the guide rail, which is a magnetic material, and scattering to the outside is suppressed. Thereby, the influence of the electromagnetic wave on the device can be reduced.

According to a second aspect of the present invention, in order to achieve a second object, the power supply line is supported by a bracket attached to the guide rail.

According to the second aspect of the present invention, the power supply line is supported along the guide rail via the bracket, so that even if the car is inclined, The power supply line is located near the guide device serving as the fulcrum, so that the influence on the gap between the power supply line and the iron core is small, and the fluctuation can be suppressed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator car power supply apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of an elevator car power supply apparatus according to the present invention, FIG. 2 is a side view of the car power supply apparatus, and FIG. 3 is a schematic configuration of power supply means provided in the car power supply apparatus. FIG. 4 is a plan view showing a support state of a feed line provided in the car power supply device, FIG. 5 is a perspective view showing an iron core of a power receiving means provided in the car power supply device, and FIG. 6 is provided in the car power supply device. FIG. 10 is a perspective view showing another shape of the iron core of the power receiving unit to be used.

In general, as shown in FIGS. 1 and 2, an elevator includes a car 2 and a counterweight 3 that move up and down in a hoistway 1, and guide rails 4a and 4 that extend into the hoistway 1.
b, a guide device 5a, 5b, 5c, 5d interposed between the car 2 and the guide rails 4a, 4b to guide the car 2 along the guide rails 4a, 4b; A main rope 6 whose end is connected to the counterweight 3.

The power supply device for an elevator according to the present embodiment is provided at a building side with a power supply means 7 for generating a predetermined AC voltage, and is connected to the power supply means 7 and guided through brackets 8a and 8b. A forward feed line 9a, a return feed line 9b arranged in a loop along the vicinity of the side surface of the rail 4a, and a feed line 9a provided on the car 2 side;
Iron cores 10a and 10b facing this iron core 9b
a, a coil 10c wound around 10b to generate an electromotive force;
And a power receiving means 10 provided with the power receiving means 10d.

As shown in FIG. 3, the power supply means 7 comprises a rectifier circuit 7 for rectifying an AC power supply and converting it to a DC voltage.
a and an inverter 7 for converting a DC voltage into a high-frequency AC
b, and supplies a voltage of an arbitrary frequency to the outward feeder 9a,
It is supplied to the return line 9b. In FIG. 3, the input circuit of the inverter 7b is omitted.

Further, as shown in FIG. 4, the bracket 8a is formed of a first support 8c, one end of which is fixed to the guide rail 4a, and a nonmagnetic material, and one end of the bracket 8a is connected to the first support 8c. And a second support 8d that supports the feeder line 9a at the other end.

Further, as shown in FIG. 5, the power receiving means 10 has an iron core 10a having a substantially U-shaped cross section.
And a coil 10c which is a secondary winding wound around the iron core 10a. The primary winding is composed of the above-described power supply lines 9a and 9b. Further, as shown in FIG. 6, the iron core 10e may have a ring shape, and a coil 10f as a secondary winding may be wound around the iron core 10e.

In this embodiment, when a high-frequency current is supplied from the power supply means 7 to the power supply lines 9a and 9b, the coils 10c and 10d wound around the iron cores 10a and 10b are connected to the power supply lines 9a and 9b. By facing each other, an electromotive force is generated by an electromagnetic induction effect. The electromotive force is converted into a predetermined voltage and supplied to a load provided in the car 2, for example, a power supply for lighting, a power supply for door driving and a power supply for signals, which are not shown. At this time, when the high-frequency current is supplied to the feed lines 9a and 9b, the feed lines 9a and 9b serve as antennas to emit high-frequency electromagnetic waves, but the forward feed line 9a and the return feed line 9
By arranging the guide rail 4a, which is a magnetic material, in the loop b, a part of the radiated electromagnetic wave is absorbed by the guide rail 4a, and scattering to the outside is suppressed.

Also, even if a passenger in the car 2 leans on one side and the car 2 tilts, for example, the power supply lines 9a and 9b are moved along the guide rail 4a via the brackets 8a and 8b. When the car 2 is tilted, the feed lines 9a and 9bb are arranged near the guide devices 5a and 5c serving as fulcrums when the car 2 is tilted.
a, 9b and the gap between the iron cores 10a, 10b has little effect.

In the embodiment configured as described above, the scattering of the electromagnetic wave is suppressed, so that the influence of the electromagnetic wave on devices, for example, a door driving control device, a communication device, and a video device can be reduced. Further, even if the car 2 is tilted, the influence on the gap between the power supply lines 9a and 9b and the iron cores 10a and 10b is small, and the fluctuation is suppressed. Power can be supplied, and the power supply lines 9a and 9b
0a and 10b can be prevented from being damaged by contact.

FIG. 7 is a side view showing another embodiment of the elevator car power supply apparatus of the present invention. The same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

A car power supply device according to another embodiment includes a plurality of brackets 18a, 18b, 1 arranged at predetermined intervals.
The feeding line 19a is supported by 8c and 18d. Further, in the embodiment shown in FIG. 2, the power supply line 9a passes through a gap below the guide rail 4a. If there is no gap, the power supply line 19a is connected to the guide rail 14a as shown in FIG.
In the lower part a, it is arranged so as to straddle this guide rail 14a.

In another embodiment configured as described above,
Since the power supply line 19a is supported by the plurality of brackets 18a to 18d, the power supply line 19a due to an earthquake or strong wind is provided.
And the fluctuation of the gap between the power supply line 19a and the iron core 10a is reliably suppressed, whereby the fluctuation of the secondary-side electromotive force can be reduced and stable power supply can be performed. Can be prevented from contacting the iron core 10a and being damaged. Further, there is no restriction on the arrangement of the power supply line 19a, and the workability can be improved.

[0025]

According to the first aspect of the present invention, as described above, the scattering of the electromagnetic wave is suppressed, so that the electromagnetic wave can be applied to devices such as a door driving control device, a communication device, and a video device. The effect can be reduced, thereby improving safety and device reliability.

Further, since the invention according to claim 2 of the present invention is configured as described above, it is possible to suppress the fluctuation of the gap between the power supply line and the iron core when the car is tilted. Stable power supply can be performed with less fluctuation of the secondary side electromotive force, and the power supply line can be prevented from being damaged by contact with the iron core.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an elevator car power supply device of the present invention.

FIG. 2 is a side view of the car power supply device.

FIG. 3 is a schematic configuration diagram of power supply means provided in the car power supply device.

FIG. 4 is a plan view showing a support state of a power supply line provided in the car power supply device.

FIG. 5 is a perspective view showing an iron core of a power receiving means provided in the car power supply device.

FIG. 6 is a perspective view showing another shape of the iron core of the power receiving means provided in the car power supply device.

FIG. 7 is a side view showing another embodiment of the elevator car power supply device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Car 2a 4b, 14a Guide rail 5a, 5b, 5c, 5d Guide device 7 Power supply means 8a, 8b, 18a, 18b, 18c, 18d Bracket 9a, 9b, 19a Power supply line 10 Power receiving means 10a, 10b , 10e iron core 10c, 10d, 10f coil

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Fumihiro Ogawa 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building Systems Co., Ltd. (72) Sanjishi Hayasaka 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo F term in Hitachi Building Systems, Ltd. (reference) 3F002 GA03 GB02 3F305 BB08 5H105 AA16 BA01 BB07 CC02 DD10

Claims (2)

[Claims] 1. A power supply means installed on a building side for generating a predetermined AC voltage, a power supply line connected to the power supply means and extending into a hoistway, and a car side moving up and down along a guide rail. And a power receiving means provided with an iron core facing the power supply line and a coil wound around the iron core to generate an electromotive force, wherein the power supply line is disposed near a side surface of the guide rail. An elevator car power supply device, which is arranged in a loop along the path. 2. The elevator car power supply device according to claim 1, wherein the power supply line is supported by a bracket attached to the guide rail.