JPH0379576A - Communication device for elevator - Google Patents

Abstract

PURPOSE:To prevent the leak of the unnecessary electric waves outside an elevator passage when an elevator is controlled, using the electric waves, by electromagnetically shielding the elevator passage for an elevator cage. CONSTITUTION:The upper surface 3a of an elevator passage 3 is covered with a transparent glass for viewing, and glass windows 100a and 110a for viewing the inside from outside are installed onto a door 110 at a getting-on field on each floor and the door 110 of a cape 1 which is opposed to the door 110. Though, in the ordinary case, unnecessary electric waves are sometimes irradiated through these glasses, each glass is formed by uniformly applying a thin metal film 201 onto a normal glass 200 and applying a hard coat layer 202 over the metal film 201, and the light transmission performance nearly equal to that of the normal glass is obtained, and the metal film 201 is grounded. Therefore, the leak of the unnecessary electric waves outside the elevator passage 3 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an elevator communication device, and more particularly to an improvement in an electrical signal transmission system between an elevator shaft and an elevator machine room.

(Prior Art) In conventional elevators, control cables are used for signal transmission between the machine room and the car and for supplying power from the machine room to the car. However, control cables may not be usable for outdoor observation elevators, high-lift oblique elevators, etc.

Therefore, several methods have been proposed and put into practical use that do not use control cables during signal transmission or power supply.

Examples include: (1) A method in which a battery is loaded in the car, and the loaded battery is used to power the lighting inside the car and the driving device for opening and closing the door, and inductive radio is used for signal transmission between the machine room and the car. .

(2) A method of supplying power to the car and transmitting signals using a trolley wire.

However, these methods have the following drawbacks.

For example, in method (1), the battery is heavy, requires time and effort to maintain, has a short lifespan, and is also expensive.

In addition, although guided radio is practical for transmitting signals such as calling, it has problems with reliability when transmitting safety circuit signals such as emergency stop signals in the event of an abnormality or detecting that a door is open. Furthermore, in recent years, a monitor camera ITV for monitoring the inside of the car is often provided inside the car, and image signals cannot be transmitted using the guided radio method.

Regarding method (2), since the number of trolley wires that depend on the number of stopped cars is required, each stop signal can be transmitted using a small number of trolley wires when the number of stopped cars is small, making it practical. However, as the number of stops increases, it becomes physically difficult to lay the trolley wire, and it becomes impossible to supply power and transmit signals using the trolley wire.

Therefore, a method has been proposed in which power transmission and signal transmission, which requires a large number of signal lines, are performed through separate transmission systems, thereby increasing the reliability and diversity of signal transmission and reducing the number of trolley wires. There is.

Figure 3 shows this method. In the figure, (1) is a basket;
(2) is the counterweight, (3) is the hoistway, (4) is the car rail, (5) is the counterweight rail, (6) is the rope, (7)
Sheave, (+3), (9) is a warping wheel, (10) is a guide roller on the car side, (11) is a guide roller on the counterweight side,
(12) is the trolley wire, (13) is the current collector, (14)
, (15) are the car side antenna and machine room antenna, (1B) is the machine room control panel, and (17) is the heel control.

Moreover, FIG. 4 shows the configuration of the signal transmission system inside the elevator car (1) and on the side of the elevator machine room (l^). In the figure, (12a) is elevator mMI! (
This is a power trolley wire that supplies power from the elevator (1^) to the elevator (1).Power is sent from the power supply (30) in the machine room (IA) through the transformer (31) to the power trolley wire (12a). Ru. (12a>,
(12b) is a safety circuit trolley wire, and the cage (1)
The safety signal output via the safety circuit switch (32) on the side is connected to the safety circuit trolley wire (12a), (12b).
) and send the safety signal to the machine room control panel (16
).

In the elevator car (1), (17) outputs a door opening/closing command to the door opening/closing electric motor (26) based on the car call registration signal input from the car operation panel (25), and also outputs a door opening/closing command to the door opening/closing electric motor (26). a microprocessor that generates a door closing completion signal to the cage, (27) a microphone that sends a voice message inside the cage, (28) a speaker that sends a voice message to the frame (1), (29) a speaker that transmits a voice message to the frame (1). A television camera (14) captures the image information inside the car and transmits the destination floor signal, audio and image information inside the car onto radio waves.
This is the car side antenna that transmits audio information to the TF4 side (IA) side and receives audio information from the TF4 room (IA) side. In addition,(
22) is a transformer that steps down the voltage of the power supplied from the power trolley wire (12a) and supplies it to the microprocessor (17), the car interior lighting, etc. (23).

On the other hand, in the elevator machine room (IA), (15) receives the destination floor signal received by the machine room side antenna (15) which transmits and receives car position signal audio and image information between the elevator and (1). Receiver, hoisting drive motor (2
(21) is a monitoring panel for the elevator car (1), a microphone (21a), and a speaker (21b).
, equipped with a car monitor television (21c).

Next, the operation of the conventional example will be explained based on the above configuration.

Electric power for electrical equipment in the elevator car (1), such as the car lighting (23) and the microprocessor (17) for car call registration control and door opening/closing control, is supplied from the elevator machine room (IA) through the hoistway. The power is supplied from a power supply trolley wire (12a) laid down. The detection signal of the door closed detection switch (32), which detects that the elevator car door is closed, is also transmitted through the safety circuit trolley wire (12a), which is also laid through the hoistway to the elevator machine room (1^). 12b) to the aircraft room (IA
) machine room i! Sent to IJ Goban (16).

Furthermore, when the destination in the car (1) is registered on the car operation panel (5), the microprocessor (17) calculates a door closing command and drives the door opening/closing electric motor (25) to close the door. When the door closed detection switch (32) is closed, a part of the door closed detection switch (32) is closed, and the machine room control panel (1B) is connected by the trolley wire (12b).
sends a door closing completion signal to On the other hand, a microprocessor (1
7) sends the destination floor signal to the car side antenna (14), and the car side antenna (14) transmits it to the machine room antenna (15) on, for example, a 50GH2 radio wave.

At the same time, this radio wave carries an audio signal from the microphone (27) of the in-car intercom and a video signal from the television camera (29).

In the machine room (LA), this radio wave is received by the machine room (15), sends a destination floor signal to the control panel (16), and is also sent to the audio/video signal monitoring board (21), where it is sent to the speaker (21b), monitor TV ( 21). In addition, audio signals from the microphone (21) (including BGM signals) and car position signals from the m-mounted control panel (16) are carried on radio waves by the machine room antenna (15), and are transmitted to the car side. The signal is fired toward the antenna (14), and the microprocessor (17) lights up the indicator on the car control panel (26). In addition, in the event that the motor is suddenly stopped in the car, the safety circuit switch (32) is activated, and the machine room control panel (16) receives this signal via the trolley wire (12b) to suddenly stop the electric motor (20).

[Problem to be solved by the invention]

However, as described above, the communication method may cause electromagnetic interference due to unnecessary radio waves.

In addition, 50 GHz radio waves are the same as light, and antennas (14)
.

(15) can be narrowed down to an extremely narrow beam, but in the case of an elevator, the axis of the radio waves shifts as the heel (1) moves, so it is adjusted so that the radio waves are slightly diffused, and even more so in the elevator shaft. Other than that, radio waves may leak.

Although elevator hoistways are generally fairly closed, they can pose a threat, particularly to the proper operation of computers within a building.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an elevator communication device that reduces leakage radio waves from the hoistway as much as possible.

[Means for Solving the Problems] An elevator communication device according to the present invention is an elevator communication device that transmits signals between an elevator and an elevator machine room via a wireless device, and an elevator car hoistway is electromagnetically shielded. It is something to do.

[Effect]

According to this invention, unnecessary radio waves are prevented from being radiated outside the hoistway by electromagnetically shielding the hoistway.

(Embodiment) FIGS. 341(a) and 341(b) show an embodiment of the present invention, which has the same basic configuration as FIG. 3.

In the diagonal elevator shown in the figure, the upper surface of the hoistway (3) (
3a) is covered with transparent glass for visibility, and 5% (100) of each of the 51 stops and the door (110) of the car (1) opposite to this are covered with transparent glass to allow the inside of the car to be seen from the outside. Glass windows (100a) and (110a) are installed, respectively. Normally, unnecessary radio waves are often radiated to the outside through these glasses, but each of the above glasses has a thin metal film (201) on a normal glass (200), as shown in the structure shown in Figure (b). is applied uniformly and a hard coat layer (202) is placed on top of it to obtain light transmittance close to that of ordinary glass, and the metal film (201) is grounded.

Therefore, unnecessary radio waves will not be scattered outside the hoistway.

In addition, Fig. 2 shows another embodiment, and it is not necessary to cover the entire surface with a metal film (201) in order to block leakage radio waves, so when it is difficult to uniformly spread a large gold pA@ (The bow can be made longer by dividing it into sections as shown in the figure).

For other parts of the hoistway other than glass, if concrete is used, for example, it will attenuate radio waves considerably, so in many cases no special measures are required, but if necessary, provide electromagnetic shielding with iron plates or the like.

Although the above embodiment describes an example of wireless communication using 500H radio waves, it is also possible to communicate using guided radio, and in this case, there are many leakage radio waves. , the effects of this invention are even more remarkable.

〔Effect of the invention〕

As described above, in this invention, since the hoistway is electromagnetically shielded, even if the elevator is controlled using radio waves, unnecessary radio waves will not leak outside the hoistway.

[Brief explanation of drawings]

Figures 1 (a) and (b) are a schematic diagram of the hoistway and the configuration of the glass according to the present invention, Figure 2 is a structural diagram of the glass according to another embodiment, and Figures 3 and 4 are the diagrams of the conventional glass. FIG. 2 is a configuration diagram illustrating a communication device for an elevator. In the diagram, (3) is the hoistway, and (Woo) and (110) are the landing and car screens. (100a) and (110a) are glass windows, (200) is a glass base, (201) is a metal film, (2
02) is a hard coat layer. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] An elevator communication device for transmitting signals between an elevator car and an elevator machine room via a wireless device, characterized in that a hoistway of the elevator car is electromagnetically shielded.