JP2001048433A - Picture device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with a long elevator shaft without extending a transmission distance in an optical space by disposing a light emitting device or a photo detecting device both at a top part and a base of an elevator shaft, and providing a photo detecting device or a light emitting device both in an upper part and a lower part of a cage. SOLUTION: A light emitting device 5 having a light transforming picture device is provided in an elevator shaft 1, a photo detecting device 6 having a light transforming picture device is provided opposite to the light emitting device 5 in a cage 3, whereby an optical signal (f) radiated from the light emitting device 5 is received by the photo detecting device 6. A transmitter 4 provided in a building manager room or the like outputs a picture signal to be displayed on a picture display device 8 to the light emitting device 5, the light emitting device 5 for receiving a picture signal converts the input signal to an optical signal (f), which is radiated to the photo detecting device 6. The photo detecting device 6 receives the optical signal (f), and the optical signal (f) is converted to a picture signal to read out a picture signal. A controller 7 outputs a read picture signal to the picture display device 8, and the picture display device 8 displays the picture signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator imaging apparatus.

[0002]

2. Description of the Related Art A video display device using a monitor television is installed in a car for the purpose of preventing crime in the car and providing information to users in the car. These can transmit images from the image capturing device provided in the car to the recording processing device provided in the manager room, machine room, etc., or the car from outside the manager room via the elevator hoistway. The video signal is transmitted to a video display device such as a monitor television.

As a video signal transmission method, there are a method of transmitting a video signal using a moving cable (tail cord) in an elevator shaft, and a method of using an optical space transmission device without using a cable in a shaft. .

Japanese Patent Application Laid-Open No. 61-197383 and JP-A-61-197383 disclose signal transmission using an optical space transmission apparatus.
As disclosed in Japanese Patent Application Laid-Open No. 3-79574, there has been proposed a car in which a light-emitting device and a light-receiving device are installed in a car, and a light-receiving device and a light-emitting device are installed at predetermined positions of an elevator shaft to transmit signals.

[0005]

In the above prior art, the installation of the light emitting device and the light receiving device having the light conversion function is an installation method along the traveling axis of the elevator. For this reason, the distance between the light emitting device and the light receiving device varies depending on the stop position of the elevator, and thus the amount of received light varies. . For this reason, transmission performance for a long transmission distance is required, and the product cost rises. In addition, it is necessary to align the optical axes even at the farthest position, and there is a problem that it is difficult to adjust the optical axes between the light emitting device and the light receiving device.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in the prior art and to provide an elevator video apparatus which can cope with a long hoistway without extending the transmission distance in an optical space.

[0007]

In order to achieve the above object, the present invention provides an elevator car for servicing a plurality of floors provided with a video photographing device or a video display device. A light-emitting device and a light-receiving device, further comprising a recording processing device for receiving and recording a video signal of the video photographing device, a transmitting device for outputting a video signal to the video display device, and converting these video signals into optical signals for transmission and reception. , The light emitting device or the light receiving device is provided at both the top and the bottom of the hoistway, and both the light receiving device or the light emitting device are provided at the upper and lower portions of the one-way car.

According to the present invention constructed as described above, since the light emitting device and the light receiving device are located in both directions above and below the car of the elevator, the transmission of the image is performed by the side where the distance between the light emitting device and the light receiving device is short. As a result, the longest transmission distance can be reduced to about half of the length of the hoistway. Thus, it is possible to provide an elevator video apparatus in which the optical axis can be easily adjusted.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of an elevator video apparatus according to an embodiment of the present invention. In FIG. 1, 1 is an elevator hoistway, 2 is an elevator machine room, and a machine room 2
The car 3 is provided with a car 3 which is moved up and down by a hoist 9 therein, and a counterweight 10 which is connected to the car 3 via a rope. Reference numeral 4 denotes a transmitting device for outputting a video signal provided in an administrator room or the like. Reference numeral 5 denotes a light-emitting device provided with a light-converted video device provided in the elevator hoistway 1. And f is an optical signal emitted from the light emitting device 5 and received by the light receiving device 6. 7 is a light receiving device 6
Reference numeral 8 denotes a video display device which is installed in the car and receives a signal from the controller 7 and displays a video on a display unit.

In FIG. 1, a transmitting device 4 provided in a management room or the like outputs a video signal to be displayed on a video display device 8 to a light emitting device 5. Light emitting device 5 to which the video signal is input
Converts the signal into an optical signal f and radiates the optical signal f to the light receiving device 6. The light receiving device 6 receives the optical signal f, converts the optical signal f into a video signal, and reads out the video signal. The controller 7 outputs the read video signal to the video display device 8. The video display device 8 receives a video signal from the controller 7 and displays the video signal as an output on a display portion of the video display device 8, for example, a monitor television unit. Through a series of operations, the user in the car can view the video signal from the transmitting device 4 as a video on the video display device 8.

Here, switching of the image on the image display device 8 will be described. The controller 7 emits light from the light-emitting device 5 at the top of the hoistway, emits light from the signal received by the light-receiving device 6 on the car and the light-emitting device of the light-converted image device 5 at the bottom of the hoistway, and A signal is received by the light receiving device, and a signal having a shorter transmission distance is output to the video display device 8 based on an elevator position signal.

For example, when the elevator hoistway distance is long and the light is transmitted by the light emitting device 5 at the top of the hoistway and the light receiving device 6 on the car, a relatively good video signal is obtained when the elevator is running at a position above the middle. However, if the elevator travels at a position lower than the middle position, the transmission distance becomes longer, so that a stable video signal cannot be provided due to the adjustment of the performance of the light emitting device 5 and the light receiving device 6 or the optical axis. On the other hand, if the light-emitting device 5 is installed at the bottom of the hoistway and the light-receiving device 6 is installed under the car, there may be cases where a stable video signal cannot be provided at a position above the middle, contrary to the above-described installation at the top. By installing the light-emitting device 5 and the light-receiving device 6 on both the top and bottom, the controller 7 can select a stable video signal depending on the elevator car position.
A stable image can be provided even for an elevator having a long hoistway distance without improving the performance of the light receiving device 6.

FIG. 2 is an explanatory diagram of an elevator video apparatus according to another embodiment. 2, the same reference numerals as those in FIG. 1 denote the same components. In FIG. 2, reference numeral 11 denotes a video photographing apparatus for photographing the inside of a car. Reference numeral 12 denotes a video recording processing device provided in a control room or the like, 13 denotes a light receiving device having a light conversion image function provided in the elevator hoistway 1, and 14 denotes a light conversion device provided in the car 3 so as to face the light receiving device 13. The light receiving device has an image function, and g is an optical signal emitted from the light emitting device 14 and received by the light receiving device 13. Reference numeral 15 denotes a controller that inputs and controls a signal from the video photographing device 11. A video signal obtained by photographing the inside of the car 3 is converted into an optical signal by the light emitting device 14 of the car 3 via the controller 15 and transmitted to the light receiving device 13 installed in the facing hoistway 1. The transmitted optical signal g is again converted into a video signal by the light receiving device 13 and input to the recording processing device 12 to be recorded. At this time, similarly to the embodiment of FIG. 1, the controller 15 selects the light receiving device 13 and the light emitting device 14 having shorter transmission distances based on the car position signal and transmits the image. As a result, similarly to the above, it is possible to record a stable image of a car even in an elevator having a long hoistway distance without improving the performance of the light receiving device 13 of the light emitting device 14.

In addition, in the embodiment of FIGS. 1 and 2, since the transmission distance is short, there is an advantage that the adjustment of the optical axis of the light emitting device and the light receiving device is easy and the workability is greatly improved.

[0016]

As described above, according to the present invention, the light emitting device or the light emitting device is installed at the top and the bottom of the hoistway, and the light receiving device or the light emitting device is installed above and below the car. In addition, the transmission distance between the light receiving devices can be reduced to about half of the hoistway distance, and it is possible to provide an inexpensive elevator imaging device that can easily adjust the optical axis regardless of the performance of the light emitting / receiving devices.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a display device of a video device of an elevator according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a photographing device of an image device of an elevator according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 elevator hoistway 3 car 4 video transmission / reception apparatus 5 hoistway installation light-emitting device 6 car installation light-receiving device 7 controller 8 image display device 9 elevator hoisting machine 10 counterweight 11 image photographing device 12 video recording device 13 light reception for car installation Device 14 Lighting device installed in car 15 Controller f Optical signal g Optical signal

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshimi Suzuki 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan Inside the Hitachi Building System Co., Ltd. (72) Inventor Tomoaki Suzuki 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Ltd. Hitachi Building Systems Co., Ltd. (72) Inventor Hideki Takasu 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo F-term in Hitachi Building Systems Co., Ltd. 3F303 EA09 FA13

Claims (2)

[Claims] 1. An image pickup apparatus or an image display apparatus is provided in an elevator car which serves a plurality of floors, and a recording processing apparatus for receiving and recording an image signal of the image pickup apparatus in an administrator room, a machine room, or the like. And an image transmission device for outputting an image signal to the image display device, and an image device of an elevator equipped with a light emitting device and a light receiving device for converting these image signals into optical signals and transmitting and receiving the same, wherein the hoistway at the top and the bottom is A video apparatus for an elevator, comprising a light-emitting device or a light-receiving device provided together, and the light-receiving device or the light-emitting device provided both above and below a one-car. 2. The elevator imaging apparatus according to claim 1, wherein infrared rays are used as a transmission medium of the imaging apparatus.