JP2011119894A - Public-address broadcast device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a public-address broadcast device which is readily movable, even on a road which does not have sufficient width, and which transmits broadcast over a wide range. <P>SOLUTION: The public-address broadcast device includes a vehicle, a public-address unit, and an enclosure unit for storing the public-address unit for enhancing audio effect, being mounted on the vehicle and extensible to the vertically-upper side. The enclosure unit is rotatably mounted on the vehicle. The public-address broadcast device may, further, include a reproduction device capable of reproducing sound signals amplified by the public-address unit, and an antenna capable of transmitting/receiving the sound signals through radio communication. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a movable loudspeaker broadcasting apparatus. In particular, the present invention relates to a loudspeaker broadcasting apparatus that performs broadcasting while holding a loudspeaker at a high place.

  Loudspeakers are installed in municipalities such as municipalities for the purpose of disseminating local disaster prevention, emergency rescue and disaster recovery information.

  FIG. 1 is a schematic diagram of a loudspeaker broadcasting apparatus 1 disclosed in Patent Document 1. As shown in FIG. 1, the loudspeaker broadcasting apparatus 1 includes an antenna 2 that receives an audio signal, a playback device 3 that reproduces the audio signal, and a horn loudspeaker 4 that expands the audio. The loudspeaker broadcasting apparatus 1 receives an audio signal from a master station facility (not shown) that transmits a disaster prevention broadcast, a disaster broadcast, etc., and transmits the audio signal to the target area by enlarging and reproducing the audio signal.

  In Patent Document 1, a horn loudspeaker 4 is fixed at a high position by a column 5 in order to transmit a broadcast to a wide range with one loudspeaker broadcasting device 1. In addition, it is possible to transmit broadcasts over the entire target area by disposing a plurality of loudspeaker broadcasting apparatuses 1 in any location within the target area.

  In Patent Document 2, not only a sound signal is transmitted to a loudspeaker broadcasting device capable of transmitting a broadcast in a wide range as disclosed in Patent Document 1, but also on an in-vehicle wireless terminal or a portable terminal that can be carried. A method for sending an audio signal is disclosed. Therefore, even if a loudspeaker is not installed in the entire target area, when a person carrying an in-vehicle wireless terminal or a portable terminal moves to a range that requires broadcasting, the broadcast is transmitted to the terminal owned by that person. Can do.

JP-A-10-242873 JP 2008-288774 A

  However, in the loudspeaker broadcasting device disclosed in Patent Document 1, when a disaster occurs and the support column collapses, the audio signal cannot be received or reproduced, and disaster is one of the purposes of the loudspeaker broadcasting device. There was a problem that sometimes broadcasting could not be transmitted.

  In addition, in the method disclosed in Patent Document 2, the in-vehicle wireless terminal or the mobile terminal cannot be used for loudspeaking, and thus disaster information may not be noticed. Even if the loudspeakers are individually moved, it is difficult to fix the loudspeakers to the same height as in Patent Document 1, and the range of transmission is limited.

  In order to mount the loudspeaker broadcasting device disclosed in Patent Document 1 on a vehicle and make it movable, the vehicle is limited to a large vehicle from the viewpoint of ensuring stability during movement. However, a large vehicle cannot travel on a narrow road, and it is not easy to change the direction of the vehicle, so that the movable range is limited. In particular, when a disaster occurs, the road may become narrower due to the collapse of the building or other obstacles, and there has been a problem that it is impossible to move to the target location.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a loudspeaker broadcasting apparatus that can be easily moved on a road that is not wide enough and that can transmit a broadcast over a wide range.

  In order to achieve the above object, the present invention is a vehicle, a loudspeaker, and an enclosure that accommodates the loudspeaker to enhance the acoustic effect, and is mounted on the vehicle and is extendable upward and downward in the vertical direction. And an enclosure part.

  According to the present invention, it is possible to easily move even on a road that is not wide enough, and broadcast transmission is possible over a wide range.

It is the schematic of the conventional loudspeaker broadcasting apparatus. It is the schematic of the loudspeaker broadcasting apparatus in embodiment of this invention.

  Embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 2 is a schematic diagram of the loudspeaker broadcasting apparatus 6 in the embodiment of the present invention. As shown in FIG. 2, the loudspeaker broadcasting device 6 includes an enclosure loudspeaker 8 that expands sound in a vehicle 7. The vehicle 7 is provided with an antenna 2 for receiving an audio signal and a playback device 3 capable of reproducing the received audio signal.

  The enclosure loudspeaker 8 enhances the acoustic effect by housing the loudspeaker 10 in a box or structure called an enclosure. In the present embodiment, the enclosure loudspeaker 8 includes an enclosure part 9 that can be expanded and contracted vertically upward from the vehicle 7, and a loudspeaker part 10 that is disposed at the uppermost part of the enclosure part 9. When the enclosure part is extended to the maximum, the loudspeaker part 10 is at a high place and can transmit a broadcast to a wide range.

  Examples of the expandable structure of the enclosure part 9 include a structure in which hollow similar-shaped cylinders and polygonal columns are built in in order from a larger dimension, and expansion and contraction is performed by sliding the cylinders and polygonal columns. Moreover, the mechanism which can be fixed in the state which extended the enclosure part 9 is also provided.

  As a loudspeaker used for the loudspeaker broadcasting apparatus 6, a horn loudspeaker can be cited in addition to an enclosure loudspeaker. Since the horn loudspeaker is heavier than the enclosure loudspeaker 8, a strut with sufficient strength must be used to fix the horn loudspeaker at a high place. Therefore, in order to move the horn loudspeaker fixed at a high place with a strut having sufficient strength, it is limited to a large vehicle such as a fire engine or a special vehicle.

  When the enclosure type loudspeaker 8 is used, the weight can be reduced as compared with the case where the horn type loudspeaker is used. Therefore, the enclosure type loudspeaker 8 can be moved even in a small vehicle, a so-called light vehicle. Moreover, since the enclosure part 9 plays the role of a support | pillar by lengthening the enclosure part 9 to the vertical direction upper side, the weight for a support | pillar can also be reduced in weight.

  Furthermore, the enclosure part 9 has a structure that can be expanded and contracted. Accordingly, when the vehicle 7 is moved, the enclosure portion 9 is contracted to lower the center of gravity of the loudspeaker broadcasting device 6, and the loudspeaker broadcasting device 6 can be moved in a stable state.

  The enclosure loudspeaker 8 is rotatably fixed to the vehicle 7 and can reproduce sound in a desired direction.

  Next, the operation of the embodiment of the present invention will be described.

  The operator of the loudspeaker broadcasting apparatus 6 moves the vehicle 7 of the loudspeaker broadcast apparatus 6 to the target area. When the vehicle 7 of the loudspeaker broadcasting device 6 is moved, the enclosure unit 9 is contracted in order to lower the center of gravity of the loudspeaker broadcast device 6.

  While moving to the target location or when arriving at the target location, the operator uses the antenna 2 to receive an audio signal from a master station equipment (not shown). The master station equipment can wirelessly communicate disaster broadcasts and disaster broadcasts.

  When the loudspeaker broadcasting apparatus 6 arrives at the target location, the operator stops the vehicle 7. Thereafter, the audio signal received from the master station facility is reproduced using the reproduction device 3. When reproducing the audio signal, the enclosure portion 9 is extended and the loudspeaker portion 10 is held at a high place. Broadcasting can be transmitted over a wide range by reproducing the audio signal at a high position in the loudspeaker 10.

  Further, the enclosure loudspeaker 8 is rotated according to the direction of the target area, and the direction of the loudspeaker 10 is determined. By changing the direction of the loudspeaker 10, the broadcast can be transmitted in a desired direction.

  In the loudspeaker broadcasting apparatus 6 in the present embodiment, the enclosure loudspeaker 8 is used as the loudspeaker, and the enclosure part can be expanded and contracted, so that the center of gravity of the loudspeaker broadcast apparatus 6 can be lowered. Therefore, it is not necessary to use a large special vehicle as the vehicle 7 in order to move the loudspeaker broadcasting apparatus 6 stably, and even a small vehicle, a so-called light vehicle, can be moved sufficiently.

  By reducing the size of the vehicle 7, it becomes easy to travel even on narrow roads. Further, the direction of the vehicle 7 can be easily changed even in a place that is not sufficiently wide. Therefore, the loudspeaker broadcasting device 6 can easily reach the target place as compared with a large vehicle.

  Further, the antenna 2 may be capable of transmitting and receiving with the master station equipment. By making it possible to transmit an audio signal from the loudspeaker broadcasting device 6 to the master station facility, it is possible to transmit information from the operator of the loudspeaker broadcast device 6 to the master station facility.

DESCRIPTION OF SYMBOLS 1 Fixed type loudspeaker broadcasting apparatus 2 Antenna 3 Playback apparatus 4 Horn type loudspeaker 5 Prop 6 Mobile loudspeaker broadcasting system 7 Vehicle 8 Enclosure loudspeaker 9 Enclosure part 10 Loudspeaker part

Claims (3)

The vehicle,
The loudspeaker,
A loudspeaker broadcasting apparatus comprising: an enclosure unit that houses the loudspeaker unit and enhances an acoustic effect, the enclosure unit being mounted on the vehicle and extending and contracting upward in a vertical direction.   The loudspeaker broadcasting apparatus according to claim 1, wherein the enclosure portion is rotatably mounted on the vehicle.   The loudspeaker broadcasting device according to claim 1, further comprising: a playback device capable of reproducing a voice signal that is loudened by the loudspeaker unit; and an antenna capable of transmitting and receiving the voice signal by wireless communication.

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