JP2003212448A - Space optical transmission device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a space optical transmission device of an elevator capable of easily aligning an optical axis regardless of the distance from a light emitting apparatus to a light receiving apparatus. <P>SOLUTION: The optical transmission device comprises the light emitting apparatus that is disposed in a car and radiates an optical signal and the light receiving apparatus 31 that is disposed in the upper part of a hoistway, is faced to the light emitting apparatus, and receives the optical signal. A light receiving surface 31a of the light receiving apparatus 31 is provided with a light emitting indicator 31b for announcing the fact that a light receiving level of the light receiving apparatus 31 is a defined value or higher. Optical axis adjustment is performed at the highest floor position, and then the car 3 is moved toward the lowest floor position. During the movement, when the optical axis is displaced, the light receiving level becomes the defined value or lower, and the light emitting indicator 31b lights off, a worker having recognized the optical axis displacement based on the lighting off adjusts the optical axis at that position. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator spatial light transmission apparatus, and more particularly to an elevator spatial light transmission apparatus for transmitting signals between a car and a machine room.

[0002]

2. Description of the Related Art In recent years, there has been a tendency for mischief and crime in elevator cars to increase, and security cameras have been installed in the cars in order to prevent this or to utilize it for identifying the performer after the occurrence. The number of elevators has increased. In addition, in the modern age of the information age, the user expects that various necessary information will be provided by the information display device at a short time when the passenger is in the car.

Under such circumstances, in a new elevator newly installed in a building, a moving cable, that is, a coaxial cable contained in a tail cord, or a coaxial cable along the tail cord, the passenger car can be mounted. The image signal of the internal security camera is transmitted to a recording device installed in a machine room or the like, or a monitor TV set in a control room. Further, in an elevator having an information display device in a car, display signals for weather forecast, text broadcasting, etc. are transmitted via a coaxial cable.

On the other hand, when a crime prevention camera or an information display device is newly installed in an existing elevator, the method in which the coaxial cable is routed along the existing tail cord is such that the tail cord that swings or bends when the car runs is coaxial. Since the guide support of the cable becomes unstable, there is a risk of disconnection due to repeated stress or due to contact with equipment installed in the hoistway. Therefore, it is necessary to remove the existing tail cord and replace it with a tail cord containing the coaxial cable, and it is costly to install a new security camera or information display device in the existing elevator due to material costs, work costs, etc. There was a problem. In particular, the above problem was remarkable in a high-rise building with a long hoistway stroke.

For this reason, conventionally, from the viewpoint of reliability and cost, a wired one using a coaxial cable and a wireless one transmitting information by a spatial optical transmission device have been proposed. Here, what applies the spatial light transmission device to an elevator and transmits the image signal in the car to the management room via the machine room will be described with reference to the drawings.

FIG. 3 is a side view showing a conventional spatial light transmission device for an elevator, FIG. 4 is an explanatory view for explaining the direction of the optical axis of the spatial light transmission device, and FIG. 5 shows the relationship between the light receiving level and the image quality. FIG.

The elevator has a hoistway 1 as shown in FIG.
Machine room 2 formed adjacent to the upper part of the car, a car 3 and a counterweight 4 hoisted in a hoistway in the hoistway 1, and a car room 3 and a counterweight 4 installed in the machine room 2 to drive the car 3 and the counterweight 4. A hoisting machine 5, a security camera 6 installed in the car 3, a monitor TV 8 installed in the control room 7 outside the hoistway 1 and capable of outputting the image signal captured by the security camera 6, A guide roller 16 for guiding the car 3 along the guide rail 15 is provided.

The conventional spatial light transmission device is installed on the car 3 via the light emitter fixing bracket 13, is connected to the security camera 6, and emits an optical signal.
It is installed in the upper part of the hoistway 1, that is, in the lower part of the machine room 2 via a bracket 14 for fixing a photoreceiver, receives an optical signal facing the light emitter 9, and is connected to the monitor TV 8 via a signal cable 11. The light receiver 10 is provided.

In the conventional spatial light transmission device configured as described above, when an image signal is sent from the security camera 6 installed in the car 3 to the light emitter 9, the light emitter 9 transmits the image signal. The signal is converted into a high-frequency signal by FM modulation that is less susceptible to distortion, and is converted from an electric signal to near-infrared light by a near-infrared light emitting diode (not shown), and the light signal 12 is irradiated toward the light receiver 10. On the other hand, the light receiver 10 converts an optical signal 12 into an electric signal by a photodetector such as a phototransistor (not shown), demodulates it into the same high frequency signal as the light emitter 9 to take out an image signal, and monitors it via a signal cable 11. It is sent to the television 8 and the monitor television 8 outputs the image signal.

By the way, when the spatial light transmission device is applied to an elevator, after the light emitter 9 and the light receiver 10 are attached, work for aligning the optical axes is required. For optical axis alignment, as shown in FIG. 3, first, the car 3 is stopped at the uppermost floor position shown by the broken line, and the horizontal and vertical directions of the receiver fixing bracket 14 are adjusted from above the car 3 to position the light receiver 10. Is fixed at a position separated from the guide rail 15 by a predetermined distance A. Then the car 3
Adjust the horizontal and vertical of the bracket 13 for fixing the light emitter,
The position of the light emitter 9 is fixed at a position separated from the guide rail 15 by a predetermined distance A. After that, the car 3 is moved to the lowest floor position, and the light receiving level of the light receiver 10 is confirmed at this position. That is, the optical axis is aligned by an indicator generally provided in the light receiver 10, and the monitor television 8 is connected to the light receiver 10 to check the image quality.

As shown in FIGS. 4 (a) and 4 (b), the optical signal 12 has a wide-angle width 12a and is emitted from the light emitter 9 and the distance between the light emitter 9 and the light receiver 10 and the light reception. The level has the relationship shown in FIG. Therefore, when the deviation of the optical axis is equal to or larger than the specified value as shown in (b), it is assumed that the car 3 is on the lower floor and the light receiver 9 is located away from the light emitter 9 as shown in FIG. There is a problem that the image quality is significantly deteriorated. Therefore, it is necessary to keep the deviation of the optical axis within a specified value as shown in (a).

Conventionally, as this type, there is one described in Japanese Patent Application No. 11-199190.

[0013]

By the way, in the above-described conventional spatial light transmission device, the optical axis is visually aligned by the indicator provided in the light receiver 10. But,
When applied to an elevator, the indicator can be easily checked because the distance to the light receiver 10 is short when the car 3 is located on the top floor, but the car 3 is placed on the bottom floor. When placed, the car that is working 3
It was difficult to confirm because there was a distance from the top to the light receiver 10. This problem was particularly noticeable in high-rise buildings with long hoistway strokes. It is also possible to open the hatch door from the elevator hall on the top floor with the car 3 positioned on the bottom floor and look into it, and visually check the indicator of the light receiver 10. It also increases the work time and is not realistic.

The present invention has been made in view of the above-mentioned circumstances in the prior art, and an object thereof is spatial light of an elevator that can easily perform optical axis alignment regardless of the distance from the light emitter to the light receiver. It is to provide a transmission device.

[0015]

In order to achieve this object, the present invention provides a light emitter installed in a car for emitting an optical signal, and a light emitter installed in the upper part of a hoistway and facing the light emitter. In a spatial light transmission device for an elevator, which comprises a light receiver for receiving a signal, and which transmits a signal between the car and the machine room, the light receiver is configured so that the light receiving level of the light receiver is equal to or higher than a specified value. It is configured to include an informing means for informing.

According to the present invention configured as described above, when the optical axis is adjusted, the operator performs the optical axis adjustment on the uppermost floor, and performs the low speed operation on the car while moving toward the lowermost floor. Move the car. During this period, the notification means provided in the light receiver constantly notifies that the light reception level of the light receiver is equal to or higher than the specified value. On the other hand, when the optical axis is deviated and the light receiving level becomes equal to or lower than the specified value, the operator can immediately recognize the fact and adjust the optical axis at that position. Since the light receiving level of the light receiver is notified in this manner, the optical axis can be easily aligned regardless of the distance from the light emitter to the light receiver.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the spatial light transmission device for an elevator according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the spatial light transmission apparatus for an elevator according to the present invention, and FIG. 2 is a plan view of a light receiver provided in the spatial light transmission apparatus. In addition, FIG.
The same parts as those shown in FIG. That is, 1 is a hoistway, 2 is a machine room, 3 is a car, 4 is a counterweight, 5 is a hoist, 6 is a security camera, 7 is a control room, 8 is a monitor TV, 11 is a signal cable, 12 is a An optical signal, 13 is a light emitting device fixing bracket, 14 is a light receiving device fixing bracket, 15 is a guide rail, and 16 is a guide roller.

As shown in FIG. 1, the elevator spatial light transmission apparatus of the present embodiment is provided with a light emitter 30 installed in a car 3 for emitting an optical signal, and a light emitter 3 installed in an upper portion of a hoistway 1.
0 and a light receiver 31 for receiving an optical signal, the light receiving surface 31a of the light receiver 31 as shown in FIG.
In addition, an informing means for informing that the light receiving level of the light receiver 31 is a specified value or more, that is, the light emitting indicator 31.
b is provided. Further, the light emitting indicator 31b emits light when the light receiving level is equal to or higher than a specified value, turns off when the light receiving level is equal to or lower than the specified value, and enables visual confirmation even if the spatial light transmission device is away from the rated distance. It has an easy-to-feel color tone and brightness.

In this embodiment, in the optical axis alignment, first, the car 3 is stopped at the uppermost floor position shown by the broken line, and the horizontal and vertical directions of the receiver fixing bracket 14 are adjusted from above the car 3, The position of the light receiver 31 is fixed at a position separated from the guide rail 15 by a predetermined distance A. Next, the horizontal and vertical directions of the bracket 13 for fixing the light emitter are adjusted on the car 3 and the light emitter 3 is adjusted.
The position of 0 is fixed at a position separated from the guide rail 15 by a predetermined distance A. After that, the car 3 is moved toward the lowest floor shown by the solid line while performing low speed operation on the car 3. During this time, if the light receiving level of the light receiver 31 is equal to or higher than the specified value, the light emitting indicator 31b provided in the light receiver 31 continues to emit light. On the other hand, when the optical axis is shifted and the light receiving level becomes equal to or lower than the specified value, the light emitting indicator 31b is turned off. The worker who recognizes the deviation of the optical axis by turning off the light emitting indicator 31b adjusts the optical axis at that position. While repeating this procedure, the car 3 is moved to the lowest floor position, and the light receiving level of the light receiver 31 is confirmed.

In the embodiment configured as described above, the light receiving level of the light receiver 31 is notified by the light emitting indicator 31b, so that the optical axis can be easily aligned regardless of the distance from the light emitter 30 to the light receiver 31. You can As a result, the adjustment time can be shortened, the work can be performed safely without requiring work in a dangerous position, and the operation of the car 3, the optical axis adjustment, and the light reception level can be checked on the car 3. Since it can be done, labor saving can be achieved.

[0022]

Since the present invention is configured as described above, since the light receiving level of the light receiver is notified by the notifying means, the optical axis can be easily aligned regardless of the distance from the light emitter to the light receiver. You can As a result, the adjustment time can be shortened, the work can be performed safely without requiring work in a dangerous posture, and the operation of the car, adjustment of the optical axis, and confirmation of the light receiving level can be performed on the car. Therefore, labor saving can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a spatial light transmission device for an elevator according to the present invention.

FIG. 2 is a plan view of a light receiver provided in the spatial light transmission device.

FIG. 3 is a side view showing a conventional spatial light transmission device for an elevator.

FIG. 4 is an explanatory diagram illustrating a direction of an optical axis of the spatial light transmission device.

FIG. 5 is an explanatory diagram showing a relationship between a light receiving level and image quality.

[Explanation of symbols]

1 hoistway 2 Machine room 3 cage 4 counterweight 5 hoisting machine 6 security cameras 7 management room 8 monitor TV 12 Optical signal 30 light emitter 31 light receiver 31a Light receiving surface 31b Luminous indicator (informing means)

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Claims (3)

[Claims] 1. A car cage machine comprising: a light emitter installed on a car to emit an optical signal; and a light receiver installed on an upper part of a hoistway to face the light emitter to receive the optical signal. In an elevator space optical transmission device for transmitting signals between rooms, the light receiver is provided with an informing means for informing that a light receiving level of the light receiver is equal to or more than a specified value. Optical transmission equipment. 2. The spatial light transmission device for an elevator according to claim 1, wherein the notification means comprises a light emission indicator. 3. The spatial light transmission device for an elevator according to claim 2, wherein the light emission indicator is installed on a light receiving surface of the light receiver.