JP2001058767A - Image device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image device of elevator capable of minimizing the transmission distance in light space. SOLUTION: A light emitting device 5 is installed on the wall of an elevator shaft 1 or on an appendix apparatus in the direction perpendicular to the axis of elevator running while a light receiving device 6 is installed on a car 3 in the direction perpendicular to the axis of elevator running, and thereby it is possible to minimize the transmission distance between the light emitting device 5 and light receiving device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator video apparatus provided with a light emitting device and a light receiving device.

[0002]

2. Description of the Related Art Recently, a video display device using a monitor television has been installed in a car for the purpose of providing information to users in the car. These are for transmitting a video signal from outside such as an administrator room to a car via an elevator hoistway and outputting the video signal on a video display device such as a monitor television.

Conventionally, video signal transmission methods include a method of transmitting a video signal using a moving cable (tail cord) in an elevator shaft, and a method using an optical space transmission device without using a cable in the shaft. There is.

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-mentioned conventional apparatus, the light-emitting device and the light-receiving device are installed along a 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 capable of minimizing a transmission distance in an optical space.

[0007]

In order to achieve the above object, the present invention provides an image display device in an elevator car, and transmits an image signal to the image display device in a management room or an elevator machine room. In an elevator video apparatus having a transmitting device for outputting, an auxiliary device of an elevator shaft wall or a hoistway has an optical axis in a direction perpendicular to the traveling axis of the car, and a video signal from the transmitting device. A light emitting device that emits light as an optical signal is provided, while a light receiving device that receives an optical signal from the light emitting device is provided in the car, and the optical signal of the light receiving device is converted into a video signal, and the video display device It is configured to display.

According to the present invention, the light emitting device and the light receiving device are installed at right angles to the traveling axis of the elevator, so that the distance between the light emitting device and the light receiving device can be minimized. It is possible to provide an inexpensive video device that is easy to adjust the optical axis.

[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 the figure, reference numeral 1 denotes an elevator hoistway, 2 denotes an elevator machine room, and a car 3 which is lifted and lowered by a hoisting machine 10 in the machine room 2, and a counterweight 11 connected to the car 3 via a rope are provided. Have been. 4 is a transmitting device provided in a control room or an elevator machine room, etc., 5 is an elevator hoistway 1
The light emitting device provided in the vehicle has an optical axis in a direction perpendicular to the traveling axis of the car 3 and emits a video signal from the transmitting device 4 as an optical signal. 6 is the light emitting device 5 in the car 3
Is a light receiving device provided to face the light emitting device 5;
Is an optical signal emitted from the light receiving device 6 and received by the light receiving device 6. 7
Is a memory device for inputting and storing signals from the light receiving device 6, 8 is a controller for inputting and controlling signals from the memory device 7, 9 is installed in a car and receives a signal from the controller 8 and displays a signal. This is a video display device for displaying video on a computer.

The transmitting device 4 provided in the manager's office or the like outputs a video signal to be displayed on the video display device 9 to the light emitting device 5. The light emitting device 5 that has received the video signal converts the signal into an optical signal f and emits 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 outputs the video signal to the memory device 7. The memory device 7 stores the input signal. The controller 8 reads out the video signal stored in the memory device 7. The controller 8 outputs the read video signal to the video display device 9. The video display device 9 receives a video signal from the controller 8 and displays the video signal as an output on a display portion of the video display device 9, 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 output device 9.

Here, switching of the image on the image display device will be described. The controller 8 reads the video signal from the memory device 7 and outputs it to the video display device 9. When new information is stored in the memory device 7, that is, when the light emitting device 5 and the light receiving device 6 face each other, the controller 8
Reads out new information from the memory device 7 and outputs a new video signal to the video display device 9. At the same time, by erasing the old information in the memory device 7, the video can be switched. In terms of the positional relationship of the elevator, the elevator repeatedly travels and stops, and the light receiving device 6 is located at a position where the light emitting device 5 and the light receiving device 6 face each other, that is, when the car 3 arrives at the floor where the light emitting device 5 is installed. , An optical signal f is emitted and a video signal is transmitted.

Next, a method of installing the light emitting device 5 and the light receiving device 6 will be described. In the above configuration, the light emitting device 5
Is installed on the wall of the elevator shaft 1 or on an attached device in a direction perpendicular to the traveling axis of the elevator. The light receiving device 6 is installed on the car 3 in a direction perpendicular to the traveling axis of the elevator.
In this way, the transmission distance between the light emitting device 5 and the light receiving device 6 can be minimized by installing the light emitting device in a direction perpendicular to the traveling axis of the elevator. That is, by minimizing the transmission distance, the light amount of the optical signal f changes according to the transmission distance, so that transmission with an extremely small light amount is possible. Further, since the transmission distance is short, there is an advantage that the adjustment of the optical axis of the light emitting device 5 and the light receiving device 6 is easy and the workability is greatly improved. In this example, the optical axis from the light emitting device is directly transmitted to the light receiving device. However, the same object can be achieved even if a reflector such as a mirror is provided on the way.

Next, the parts installed in the elevator will be described. The place to install for elevator hoistway 1 is
In order to increase the number of transmissions, the floor where the elevator waits for the longest time or the floor with the highest frequency of use is desirable.However, the situation of the building such as the method of setting the top floor or the lowest floor where the laid cable is the shortest It goes without saying that it changes depending on.

[0015]

As described above, according to the present invention, the transmission distance between the light emitting device and the light receiving device is minimized by installing the optical axis from the light emitting device in the direction perpendicular to the traveling axis of the elevator. Thus, it is possible to provide an inexpensive elevator image apparatus in which the optical axis can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an elevator video apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 elevator hoistway 3 car 4 transmitter 5 light emitting device 6 light receiving device 7 memory device 8 controller 9 video display device f optical signal

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04B 10/22 (72) Inventor Yoshimi Suzuki 1-6-6 Kanda Nishikicho, Chiyoda-ku, Tokyo Hitachi Building Systems, Ltd. (72) Inventor Tomoaki Suzuki 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Co., Ltd. Within Hitachi Building System Co., Ltd. (72) Inventor Hideki Takasu 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Co., Ltd. Hitachi Building System F Term (reference) 3F303 DB11 FA13 3F306 AA01 CB05 CB34 5K002 AA01 AA03 FA03 GA07

Claims (3)

[Claims] 1. An elevator video apparatus comprising: a video display device provided in an elevator car; and a transmitting device for outputting a video signal to the video display device in a management room or an elevator machine room. A light-emitting device that has an optical axis in a direction perpendicular to the traveling axis of the car and that emits a video signal from the transmitter as a light signal is provided on an accessory of a wall or a hoistway, while the car is provided. A light receiving device for receiving an optical signal from the light emitting device, an optical signal of the light receiving device is converted into a video signal, and the video signal is displayed on the video display device. 2. The video system for an elevator according to claim 1, further comprising a memory device for storing a video signal received by a light receiving device in said car. 3. The apparatus according to claim 1, wherein infrared light is used as the optical signal.