JPH0262384A - Talking device for elevator cage - Google Patents

Abstract

PURPOSE:To make telephone conversation between a passenger and a foreman so as not to be prevented by background music at the time of emergency or the like happening by interrupting a broadcasting set of the background music at a time when talking device is in an operating state. CONSTITUTION:When a handset RT comes off, a switch SW1 interlocking with a hook switch HS is turned to ON, whereby power is fed to amplifiers 3, 4 installed in each side of a sub-machine 1A and a new machine 1B. On the other hand, each of line switches SWR, SWT installed in signal lines LR, LT connecting the sub-machine 1A and the new machine 1B is also turned to ON as interlocked with the hook switch HS, whereby voltage is fed to a base of a transistor TR1 by way of terminals TR, TT of the new machine 1B, namely, connecting terminals TR, TT, and the transistor TR1 operates, thus a relay X comes to ON. Then, with this relay X turned on, a contact Xa is closed. With this circuit closing, a circuit for a broadcasting set speaker 7 attached to a cage from a broad casting set 6 is interrupted. Consequently, telephone conversation is in no case prevented by any music.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication device for an elevator car in which background music is broadcast.

[Conventional technology]

An elevator car is usually equipped with a communication device for communicating with outside parties, so that abnormal situations within the elevator car can be dealt with. In other words, if a passenger becomes trapped in an elevator car for some reason, the passenger must use the communication device inside the elevator car to call outside personnel (for example, the building manager or the elevator owner). The operator of the central monitoring system is called and informed of the conditions inside the elevator car, and the attendant informs the passengers of the necessary measures. In recent years, such elevator cars are often equipped with devices that play music (background music) to soothe passengers.

[Problem to be solved by the invention]

By the way, if there is an emergency situation such as a passenger being trapped in an elevator car and a call is made between a passenger and a staff member via a communication device, if background music is playing inside the elevator car, the staff member will This makes it difficult to hear what the passengers are saying, and it also becomes difficult for the passengers to hear the staff's calls. Furthermore, considering that passengers are in an excited state and are unable to have a calm conversation in an emergency situation, the interference of background music with conversations cannot be ignored.

SUMMARY OF THE INVENTION An object of the present invention is to provide a communication device for an elevator car that solves the above-mentioned problems of the prior art and allows smooth communication between passengers and staff.

[Means to solve the problem]

In order to solve the above object, the present invention provides an elevator car equipped with a broadcasting device for broadcasting music and a communication device for making calls with the outside, in which the circuit of the broadcasting device is activated when the communication device is in an operating state. It is characterized in that it is provided with a shutoff means for shutting off.

[Effect]

When an emergency situation occurs and a call is made between a passenger in an elevator car and an attendant, this call status is detected and the circuit of the background music broadcasting device is cut off to back up each other's calls. Avoid being disturbed by ground music.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3. Fig. 1 is a circuit diagram of an elevator car and an external communication device in an elevator car communication device according to an embodiment of the present invention, Fig. 2 is a communication state detection relay circuit diagram, and Fig. 3 is a broadcast for broadcasting music. In Figure 0, which is a circuit diagram of the device, IA is an in-car communication device (child unit), IB is an external communication device (new device), 1 is a transmitter, 2, 3.4 are amplifiers, 5 is a matching circuit network, RT is a handset, BT is a Cadonica battery, s
p,, sp2 is a speaker, M is a microphone.

CK is the call button for the telephone, and TR and TT are the terminals.

LR and LT are signal lines connecting slave unit IA and new unit IB, H8
is a hook switch that operates when the handset is disconnected; SWl, SWR, and SWT are switches that operate in conjunction with hook switch H8. D.

D2 is a diode, R4 and R are resistors, TR is a transistor or a relay for detecting the call status, T is a connection terminal for the Kadonica battery BT, 6 is a broadcasting device that broadcasts background music, and 7 is attached to the car. The broadcasting device speaker Xa is a contact that operates when the communication state detection relay X is turned on.

Next, we will explain the operation of this embodiment. For example, when the handset RT shown in FIG. 1 is removed, the switch SW1 linked to the hook switch H8 is turned on, and the Power is supplied to the amplifiers 3 and 4. On the other hand, the line switches SWR and SWT provided on the signal lines LR and LT connecting the slave unit IA and the new unit IB are also connected to the hook switch H8.
The voltage is supplied to the base of the transistor TR1 through the new machine IB terminals TR and TT, that is, the connection terminals TR and TT shown in FIG.
R operates, and relay X turns on. And relay X
By turning on, the contact Xa shown in FIG. 3 is opened. As a result, the circuit from the broadcasting device 6 to the broadcasting device speaker 7 attached to the elevator car is cut off.According to this embodiment, when an emergency situation occurs, the communication between the passengers in the elevator car and the attendant is interrupted. When this state is reached, this call status is detected and the circuit of the background music broadcasting device is cut off, so that there is an effect that mutual calls are not disturbed by the background music.

〔Effect of the invention〕

As described above, in the present invention, when the communication device is in operation, the background music broadcasting device is cut off, so that if an emergency situation occurs, there will be no communication between the passengers in the elevator car and the staff. When a call is being made, this call state is detected and the circuit of the background music broadcasting device is cut off, so that mutual calls are not interrupted by the background music.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an elevator car and an external communication device in an elevator car communication device according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a communication state detection relay, and FIG. 3 is a circuit diagram of a broadcasting device that broadcasts music. IA: In-car communication device, IB: External communication device. RT...Handset, X...Relay H for call status detection
8... Hook switch, 6... Broadcast device for broadcasting music, 7... Speaker park for broadcast device attached to the car.

Claims (1)

[Claims] (1) In an elevator car equipped with a broadcasting device for broadcasting music and a communication device for making calls with the outside, a cutoff means is provided to interrupt the circuit of the broadcasting device when the communication device is in an operating state. Features: Elevator car communication device.