JP5701415B1 - Emergency wide area lighting system - Google Patents

Abstract

[PROBLEMS] To illuminate a wide area leading to a specific evacuation area with brightness as if it were a full moon night, even in an emergency situation where a power outage occurred at night. An illumination device is provided. A light emitting device 1 installed at a high place overlooking almost the entire target area to be evacuated, includes an outer cylindrical body 7 having a light emitting opening 10 at one end of a cylindrical shape, and an illumination light beam. , A reflecting mirror 9 that reflects the emitted light from the light source 8 by a reflecting surface 9 a provided inside the bowl-shaped inner side and changes the light into a parallel light beam toward the light emission port 10, and a light beam in the outer cylinder 7. An optical system member 19 is disposed near the radiation port 10 and refracts at least an upper part of the parallel light beams from the reflecting mirror 9 toward the light beam radiation port 10 in a diagonally forward and downward direction in the radiation direction. ing. [Selection] Figure 2

Description

  The present invention illuminates a large area leading to a predetermined evacuation area as if it were a full moon night, especially in the event of a disaster such as a strong earthquake, large-scale fire or tsunami at night and a power outage. The present invention relates to an emergency wide-area lighting device that enables residents to quickly and surely reach a condemned place.

  In the event of a sudden disaster such as an earthquake, large-scale fire, or tsunami, it is necessary to evacuate to a safe evacuation site immediately. Therefore, in each region, evacuation drills are usually conducted by setting in advance a safe evacuation site and an evacuation route that can reach the evacuation site through a safe road in the shortest distance. However, when a large-scale disaster occurs, an unexpected situation occurs, for example, some roads on the evacuation route that residents are familiar with may be inaccessible due to collapsed buildings or severe large-scale fires. May occur. In such a case, it is considered that even residents who have undergone evacuation training lose their normal feelings and panic.

  Therefore, conventionally, various evacuation guidance systems have been proposed in which the above-described problems are solved. The first evacuation guidance system installs an evacuation guidance device in many places where many residents come and go, such as urban areas and parks, and this evacuation guidance device is a map displayed on a map information display section. An LED provided on the evacuation route in the map information display section displays the fire occurrence position by turning on or blinking the LED provided above, and the evacuation route from the fire occurrence place to the specified evacuation place Is displayed by lighting or blinking, and when the current position exists on the evacuation route, the light irradiation direction of the evacuation direction indicator is controlled to be directed to the evacuation direction and guided to the evacuation site (For example, refer to Patent Document 1).

  In addition, the second evacuation guidance system is to install a guidance guide plate at a place where a large number of residents come and go, and displays a disaster occurrence location using a plurality of light emitting elements of each guidance guide plate, In the evacuation route from the installation location of the guide plate to the evacuation site, a plurality of route guidance devices having light emitters indicating the traveling direction of the evacuation route are arranged along the evacuation route, and the plurality of route guidance devices Are lit in order from the first stage near the guidance guide plate toward the last stage near the evacuation place to display the evacuation route (see, for example, Patent Document 2).

JP 2008-234250 A JP 2010-2111648 A

However, there is a possibility of a power failure in the event of a disaster such as a strong earthquake or a large-scale fire. As a countermeasure against this power failure, power failure response devices such as generators and backup batteries are installed for each of a large number of evacuation guidance devices or guidance guide plates. It is possible to install them individually, but in such a case, the installation cost becomes extremely high, and nevertheless, it will be completely dark when a power outage occurs at night, so bring a small portable light etc. Unless the illumination light is illuminated on the evacuation guidance device or the guidance guide plate, the display contents of the evacuation guidance device or guidance guide plate cannot be fully understood. However, a person who accuses and evacuates an elderly person or handicapped person while holding a child needs both hands to hold and care, so he cannot afford to illuminate with a portable small light.

  In particular, when a strong earthquake occurs in the dark and a tsunami is forecasted for a short time of about 10 minutes, the evacuation guidance device or guidance guide plate should be attached with a portable small light. There is no time delay while checking the display contents. In other words, when a power outage occurs at night, the evacuated person is forced into a panic mentally because the surroundings are almost invisible in the dark while they must evacuate to the evacuation site in a hurry. If a wide area that leads to the evacuation site in the target area to be evacuated can be illuminated from above with a light beam like a full moon night, a collapsed building or an inaccessible road Therefore, it is considered that it is possible to evacuate quickly by eliminating the mental panic of the evacuating person, and the appearance of such an illumination device is expected.

  The present invention has been made in view of the above problems, and even in an emergency situation where a power outage occurred at night and it was completely dark, a wide area leading to a specific evacuation site could be An object of the present invention is to provide an emergency wide area illumination device that can illuminate with such brightness.

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that an outer cylindrical body in which a light emitting port is opened at one end of a cylindrical shape, a light source that emits an illumination light beam, and a light beam emitted from the light source. Reflected by a reflecting surface provided on a bowl-shaped inner surface and changed to a parallel light beam directed to the light beam emission port, and disposed near the opening of the light beam emission port in the exterior cylinder, A light radiation device comprising an optical system member that refracts at least an upper part of parallel light rays toward the light radiation opening toward the front obliquely downward in the radiation direction, and an operation control unit that controls the operation of the light radiation device; And a power supply device that supplies power to the light emitting device and the operation control unit, wherein the optical system member has one surface arranged perpendicular to the parallel light beam and the other surface on the one surface. With a certain angle It provides emergency wide illumination device according to claim are configured from that prism unit.

According to a second aspect of the present invention, there is provided an exterior cylindrical body having a light emitting port opened at one end of a cylindrical shape, a light source that emits an illuminating light beam, and a reflection that is provided on the inner surface of the light emitting light from the light source. A reflecting mirror that reflects on a surface and changes to a parallel light beam directed toward the light beam emission port, and is arranged in the vicinity of the opening of the light beam emission port in the exterior cylindrical body, A light emitting device comprising an optical system member that refracts at least an upper part thereof obliquely downward in the radiation direction, an operation control unit that controls the operation of the light emitting device, the light emitting device, and the operation control. A prism unit having one surface disposed perpendicular to the parallel light beam and the other surface having an angle α with respect to the one surface. And α is n There is provided an emergency wide area illumination device characterized by being configured to satisfy the formula: = sin (α + β) ÷ sin α . Here, n is the refractive index of the prism portion, α is the apex angle formed by the light incident surface and the light exit surface of the prism portion, and β is the refractive angle of the prism portion.

  The invention according to claim 3 is the emergency wide area illumination device according to claim 1 or 2, wherein the light source is a discharge lamp made of a xenon lamp, and the operation control unit senses a seismic intensity of a predetermined value or more. An earthquake detection sensor that outputs an earthquake detection signal, an illuminance measuring device that outputs a nighttime detection signal when illuminance below a predetermined value is detected, and the power source when both the earthquake detection signal and the nighttime detection signal are input And a controller that controls to start the apparatus and to turn on the discharge lamp.

  According to the emergency wide area illumination device according to claims 1 and 2, since the emitted light beam from the light source is reflected by the reflecting surface of the reflecting mirror and changed to the parallel beam, the parallel beam hardly spreads. Along the way, reach far. In addition to this, at least the upper part of the parallel light beam traveling from the reflecting mirror to the light beam emission port is refracted by the optical system member obliquely forward and downward in the radiation direction. By changing the traveling direction of the optical path downward, the light beam that spreads as it goes far away due to air fluctuations and attenuation can be polymerized into a lower light beam, preventing a decrease in illuminance at a distance. be able to. As a result, this light beam can be a light beam that can be projected to a distance of about 3 to 10 km, although it varies depending on the light emission intensity of the light source.

  Therefore, the light radiation device is installed on a hill overlooking the target area to be evacuated and the parallel light rays radiated from the light radiation device are set so as to extend in a substantially horizontal direction above 30 to 35 m above the ground. For example, the entire wide area under the radiating light beam is illuminated with the brightness illuminated by the full moon. This allows residents to evacuate quickly while maintaining normality without being panicked, even in a dark situation where a strong earthquake occurred at night and a power outage occurred. Moreover, since it is not necessary to use a portable small lamp or the like even when a power outage occurs, it is possible to evacuate while holding a child with both hands or caring for an elderly person or a disabled person.

  In addition, after a strong earthquake occurs and a power outage occurs, if it takes a relatively long time to recover from the power outage, the affected area should be illuminated with the equipment at night until the power outage is recovered. If this is done, lifesaving work can be efficiently promoted and a crime prevention effect can be obtained.

  According to the emergency wide area illumination device according to claim 3, the controller determines that an earthquake has occurred at night when the earthquake detection signal from the earthquake detection sensor and the night detection signal from the illuminance measuring device are input together. Since the generator is started and the discharge lamp is lit, the discharge lamp can be automatically lit and acted upon in an emergency when a disaster occurs so that it can be evacuated safely. . In particular, when a tsunami forecast is issued after the occurrence of a strong earthquake, the target area can be illuminated immediately and automatically, so that residents can feel safe and evacuate quickly to the evacuation site. There is a big effect. In addition, since the discharge lamp is lit and driven by the power generated by the generator, the discharge lamp can be lit and driven without any trouble even when a power failure occurs.

It is a perspective view which shows the emergency wide area illumination device which concerns on one Embodiment of this invention. It is a cutting | disconnection side view of the light-emitting device in the emergency wide area illuminating device same as the above. It is a front view of the light-emitting device in the emergency wide area illumination device same as the above. It is a block diagram which shows the whole structure of the emergency wide area illumination device same as the above. It is a flowchart which shows the operation control by the controller in the emergency wide area illumination device same as the above. It is an optical diagram of the optical system member in a light-emitting device same as the above.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an emergency wide area illumination device according to an embodiment of the present invention. This emergency wide area illumination device is a light beam for illuminating a wide area of about 3 to 10 km in a linear distance from above. A radiation emitting device 1, an operation control unit 2 of the light emitting device 1, a receiving device 3 that receives a start command signal and a drive stop command transmitted from a regional disaster countermeasure center described later, a generator and a battery And the light emitting device 1, the operation control unit 2, and the power supply device 4 for supplying driving power to the receiving device 3.

  2 which is a cut side view of the light emitting device 1 and FIG. 3 which is a front view thereof, the light emitting device 1 includes a discharge lamp 8 as a light source, a reflecting mirror 9 and the like inside a cylindrical outer cylindrical body 7. Is installed, and one end portion of the outer cylindrical body 7 is opened to provide a light emitting port 10. More specifically, a discharge lamp 8 that emits a strong light beam is provided in the interior central portion of the exterior cylinder 7 in an arrangement along the cylinder center of the exterior cylinder in the exterior cylinder 7. The reflecting mirror 9 is provided in such an arrangement that the emitted light beam from the discharge lamp 8 is reflected by the reflecting surface 9 a made of a bowl-shaped inner peripheral surface and radiated from the light beam emission port 10 of the exterior cylindrical body 7. The reflecting mirror 9 has a reflecting surface 9a formed in a parabolic shape, and a relatively large-diameter through-hole 9b that serves also for introducing cooling air is opened at the center.

  In this embodiment, the discharge lamp 8 is a xenon lamp that uses light from arc discharge in xenon gas. The discharge lamp 8 is arranged so as to penetrate the through-hole 9b of the reflecting mirror 9, and one end near the light emitting port 10 is fixed to the inner surface of the outer cylindrical body 7 via three support rods 11. The other end is fixed to the inner surface of the outer cylinder 7 via the mounting arm 12, the insulating plate 13 made of bakelite, and the support arm 14. As shown in FIG. 2, the discharge lamp 8 and the reflecting mirror 9 are positioned and arranged in a relative relationship in which the light divergence portion of the discharge lamp 8 matches the focal point of the reflecting mirror 9. Are reflected by the reflecting surface 9a of the reflecting mirror 9 and are changed to parallel rays directed toward the light emitting port 10. As a result, a strong linear light beam is radiated far from the light emission port 10 as its spread is small. According to the measurement results, in the case of the discharge lamp 8 composed of a xenon lamp with an output of 2 kW, the light spread in front of 1 km is only 35 m, and if the discharge lamp 8 with a higher output is used, the illumination light beam is about 10 km ahead. It is confirmed that it can be projected far away. Further, on the lower part of the outer surface of the outer cylinder 7, AC power generated by the generator of the power supply device 3 is rectified by a built-in rectifier, and predetermined DC power is supplied to the discharge lamp 8 to drive the discharge lamp 8 to light. The lamp driving unit 17 is attached, and this lamp driving unit 17 is controlled by the controller 30 of the operation control unit 2 in FIG.

  Optical that refracts the optical path of the upper half of the light beam reflected by the reflecting mirror 9 and converted into parallel light toward the front obliquely downward in the traveling direction, in the vicinity of the light beam emission port 10 inside the outer cylindrical body 7. The system member 19 is fixed by three fixing members 20 so as to close the light emitting port 10 of the exterior cylindrical body 7. The optical system member 19 has an upper semicircular portion that is circular in a front view, and is formed in a prism portion 19a that refracts the light path of the light beam obliquely downward and forward.

  Returning to FIG. 1, the outer cylindrical body 7 in which the discharge lamp 8 and the reflecting mirror 9 are installed as described above has a pair of support legs 21 b and 21 c erected on the left and right on the base plate portion 21 a. It is supported by a substantially U-shaped support base 21. Specifically, as shown in FIG. 3, a pair of rotational support shafts 23 projecting radially outward at two positions opposite to each other on the radial direction passing through the horizontal plane on the outer surface of the exterior cylinder 7, 23 is provided integrally with the outer cylindrical body 7, and the pivot shafts 23 and 23 are rotatably supported by bearings 24 and 24 provided at upper ends of the support legs 21b and 21c. As a result, the outer cylindrical body 7 is supported so as to be rotatable in the vertical direction with the pivotal support shafts 23, 23 as fulcrums, and is rotated around the vertical direction of the light emitted from the discharge lamp 8 and emitted from the light emitting port 10. The radiation angle can be variably adjusted.

Further, as shown in FIG. 2, the mounting base 27 on which the base plate portion 21 a of the support base 21 is placed and fixed has a columnar guide shaft 27 a protruding from the lower surface in the recess 28 a of the fixing base 28. The outer tubular body 7 is provided so as to be pivotable in the horizontal direction by being fitted so as to be pivotable. As a result, the outer cylindrical body 7 can variably adjust the radiation angle around the horizontal direction of the light beam emitted from the discharge lamp 8 through the light radiation port 10.

  As shown in FIG. 1, the controller 30 installed on the mounting base 29 in the operation control unit 2 includes an earthquake detection signal, an illuminance measuring device 32, which the earthquake detection sensor 31 senses and outputs a shake exceeding a predetermined seismic intensity. The night detection signal output by detecting the illuminance below the predetermined value, and the start command signal and the drive stop command signal received by the receiving device 3 from the regional disaster countermeasure center described later are input. The controller 30 drives and controls lighting of the discharge lamp 8 via the lamp driving unit 17 based on these input signals. On the other hand, the receiving device 3 includes a receiving antenna 33 and a receiving circuit unit 34 that supplies a start command signal or a drive stop command signal received by the receiving antenna 33 to the controller 30.

  The power supply device 4 that supplies driving power to each part of the light emitting device 1 incorporates a DC generator, an AC generator, and a battery having a self-generating function, and is normally driven from the battery to the controller 30 and the receiving circuit unit 34. Electric power is supplied, and the generator is activated in an emergency, and the generated electric power is supplied as driving power to the discharge lamp 8 via the feeder line and the lamp driving unit 17. Therefore, the light emitting device 1 can radiate illumination light by receiving the driving power supplied from the power supply device 4 without any trouble even in the case of a power failure that easily occurs during a large-scale disaster.

  The light emitting device 1, the operation control unit 2, the receiving device 3 and the power supply device 4 in the above-mentioned emergency wide area illumination device are installed at a high place overlooking almost the entire target area to be guided to a designated evacuation site. It is installed so that the light beam is radiated almost horizontally from the height to a height of 30 to 35 m above the ground. In this case, if a plurality of light emitting devices are arranged side by side so that the light beams emitted from them are parallel to each other, even if the target area to be illuminated is a wide area, it can be illuminated over the entire wide area. . Here, the radiation direction of the light beam is adjusted by rotating the outer cylinder 7 of the light radiation device 1 in the vertical direction and the horizontal direction.

  In addition, if a plurality of light emitting devices are arranged so that the emitted light rays face each other, a dark part due to the shadow of the high-rise building may occur even when there is a building higher than the height in the radiation direction of the light rays. Absent.

  In FIG. 4, which is a block diagram of the emergency wide area illumination device of the embodiment, this emergency wide area illumination device guides people in the area to a preset safe evacuation area when a disaster occurs in the target area. It is managed by a regional disaster countermeasure center 37 installed in a public facility or the like for the purpose of carrying out business for doing so. In this regional disaster countermeasure center 37, by manually operating the command switch 38, the control unit 39 is controlled to transmit a start command signal or a drive stop command signal from the transmission antenna 41 via the transmission circuit unit 40. Thus, the drive control of the discharge lamp 8 is remotely operated.

Next, the emergency wide area illumination device of this embodiment will be described with reference to the flowchart of FIG. The controller 30 constantly monitors the input of the earthquake detection signal from the earthquake detection sensor 31, the nighttime detection signal from the illuminance measuring device 32, and the start command signal or the drive stop command signal from the reception circuit unit 34. If a strong earthquake of a predetermined seismic intensity or higher occurs at night, the controller 30 determines that an earthquake detection signal output by the earthquake detection sensor 31 detecting the occurrence of an earthquake of a predetermined seismic intensity or higher is input (step S1). Subsequently, it is determined that the nighttime detection signal output by measuring the illuminance below the predetermined value by the illuminance measuring instrument 32 is input (step S2). Thereby, the controller 30 starts the generator of the power supply device 4 (step S4). The generated AC power of this generator is rectified by a rectifier of the lamp driving unit 17 and converted to a predetermined value of DC power, and then supplied to the discharge lamp 8 as driving power, so that the discharge lamp 8 is driven to light. In the case of a DC generator, generated DC power is supplied to the discharge lamp 8 as it is.

  The emitted light from the discharge lamp 8 is reflected by the reflecting surface 9a formed on the paraboloid of the reflecting mirror 9 and converted to a parallel light, and then emitted from the light emitting port 10. The parallel rays reach far away with hardly spreading. In addition to this, the following means for efficiently utilizing the emitted light for downward illumination is taken in the light emitting device 1 of the embodiment. That is, the light beam traveling from the reflecting mirror 9 toward the light emitting port 10 is not a strict parallel light beam due to errors such as the shape of the reflecting surface 9a of the reflecting mirror 9 but air fluctuations and attenuation, and the light beam travels away. Will spread. In this case, the light beam spreading downward contributes to the original purpose of illuminating the lower side of the light beam by a light beam extending in a substantially horizontal direction, but the light beam spreading upward becomes useless that hardly contributes to illuminating the lower part. As a result, the illuminance decreases with increasing distance from the radiation direction of the light beam. Therefore, the upper half of the parallel rays from the reflecting mirror 9 is refracted obliquely forward and downward in the light emission direction by the prism portion 19a formed in the upper semicircular portion of the optical member having a circular shape when viewed from the front. In this way, it is superposed on the lower parallel rays, and this can prevent a decrease in illuminance at a distance in the light emission direction. As a result, the light beam transmitted through the optical system member 19 corresponds to about 3 to 10 km although it varies depending on the difference in emission intensity of the light source (the rating of the xenon lamp used as the discharge lamp 8 in this embodiment). It is possible to project far away.

  The optical system member 19 will be described with reference to FIG. In the optical system member 19, when the apex angle formed by the light incident surface 19i and the light exit surface 19o of the prism portion 19a is α, the refraction angle of the prism portion 19a is β, and the refractive index of the prism portion 19a is n, the law of refraction. Based on n = sin (α + β) ÷ sin α, the shape of the prism portion 19a having the apex angle α that can efficiently superimpose the upper half of the parallel rays into the lower rays is obtained. be able to. In this case, as is apparent from the illustration of FIG. 6, the apex angle α to be obtained in order to form a preferable prism portion 19a is set so that parallel light can be obtained by the optical member 19 and the reflecting mirror 9 to be used. Nevertheless, if it is set so as to coincide with the divergence angle generated in the light beam, based on this apex angle α, the refraction angle directed in the direction in which the upper half of the parallel light beams can be efficiently superposed on the lower light beam. β is determined. For example, in the case of using the optical system member 19 formed of soda glass and having a refractive index n of 1.51, when the refraction angle β that can effectively correct the beam divergence angle is 1.75, Based on the law equation, the apex angle α is required to be 3.423, and when the refraction angle β capable of effectively correcting the beam divergence angle is 2.0, the apex angle α is 3.910. It is required to become.

  Therefore, the light emitting device 1 is installed on a hill overlooking the target area to be evacuated, and the parallel light emitted from the light emitting device 1 extends in a substantially horizontal direction at a height of about 30 to 35 m with respect to the ground. In this way, even in a dark situation where a strong earthquake occurred at night and a power outage occurred, the entire wide area under the radiating light is illuminated by the brightness illuminated by the full moon. Therefore, residents can evacuate quickly without panic and keeping a normal heart. In addition, since it is not necessary to use a portable small light, etc., it is possible to evacuate safely because it is possible to easily hold a child with both hands or to care for an elderly person or a disabled person.

Further, in this emergency wide area illumination device, the controller 30 determines that an earthquake has occurred at night when the earthquake detection signal from the earthquake detection sensor 31 and the night detection signal from the illuminance measuring device 32 are input together. Since the generator of the power supply device 4 is activated and the discharge lamp 8 is driven to light up, the discharge lamp 8 is automatically driven to light in an emergency when a disaster occurs so that it can be evacuated safely. Can respond. In particular, when a tsunami forecast is issued after the occurrence of a strong earthquake, the tsunami usually rushes after a short period of about 10 minutes from the occurrence of the earthquake. Can be evacuated safely and quickly to an evacuation site. In addition, since the discharge lamp 8 is driven to turn on with the generated power generated by the generator, the discharge lamp 8 can be driven to turn on without any trouble even when a power failure occurs.

  When an earthquake with a seismic intensity that cannot be detected by the earthquake detection sensor 31 in the target area occurs at night and the occurrence of a tsunami is predicted, the earthquake detection signal is not output from the earthquake detection sensor 31 and the discharge lamp 8 is automatically turned on. Not. In this case, the command switch 38 is manually operated in the regional disaster countermeasure center 37, and accordingly, the control unit 39 controls the transmission circuit unit 40 to transmit an activation command signal from the transmission antenna 41. The activation command signal is received by the receiving antenna 33 and input from the receiving circuit unit 34 to the controller 30. After determining that the earthquake detection signal has not been input (step S1), the controller 30 determines that the activation command signal has been input (step S3), and activates the power generator 4 (step S4). The discharge lamp 8 is immediately turned on by remote operation by the generated AC power of the generator. As a result, it is possible to evacuate safely and promptly from a tsunami that rushes after a short time of about 10 minutes since the occurrence of the earthquake. If an earthquake occurs in the daytime, the controller 30 determines that an earthquake detection signal has been input (step S1), but thereafter determines that neither a nighttime detection signal nor an activation command signal has been input (step S2). , S3) and the discharge lamp 8 is not lit. As a result, it is possible to prevent the discharge lamp 8 from being lit and driven unnecessarily during bright daytime.

  In addition, when the necessity of evacuation is resolved after the discharge lamp 8 is automatically turned on by the control of the controller 30 when a disaster occurs, it is driven by manual operation of the command switch 38 from the regional disaster countermeasure center 37. When the stop command signal is transmitted and the controller 30 determines that the drive stop command signal has been input (step S5), the controller 30 controls to stop the operation of the generator (step S6) and the discharge lamp 8 is wasted. Stop continuation of lighting drive.

  Note that the present invention is not limited to the above-described embodiment, and various additions, modifications, or deletions are possible within the scope not departing from the gist of the present invention, and such modifications are also included in the scope of the present invention. For example, in the embodiment, the case where a xenon lamp is used as the light source is illustrated, but the present invention is not limited to this, and an ultrahigh pressure mercury lamp, a mercury xenon lamp, or a metal halide lamp can be used as the light source.

1 Light emitting device
2 Operation controller
3 Receiver
4 Power supply
7 Exterior cylinder
8 Discharge lamp (light source)
9 Reflector
9a Reflective surface
10 Light exit
19 Optical components
30 controller
31 Earthquake detection sensor
32 Illuminance measuring instrument
37 Regional Disaster Countermeasure Center

Claims (3)

An outer cylindrical body having a light emitting opening opened at one end of a cylindrical shape, a light source that emits an illuminating light beam, and a light beam emitted from the light source by reflecting the light emitted from the light source on a reflective surface provided on a bowl-shaped inner surface A reflecting mirror that changes to a parallel light beam toward the mouth, and a radiation direction of at least an upper portion of the parallel light beam that is disposed in the vicinity of the opening of the light beam emission port in the exterior cylindrical body and that travels from the reflection mirror toward the light beam emission port. A light emitting device comprising an optical system member that is refracted forward and obliquely downward, and
An operation controller for controlling the operation of the light emitting device;
A power supply for supplying power to the light emitting device and the operation control unit,
The optical system member is composed of a prism portion having one surface arranged perpendicular to the parallel light beam and the other surface having a predetermined angle with respect to the one surface. apparatus. An outer cylindrical body having a light emitting opening opened at one end of a cylindrical shape, a light source that emits an illuminating light beam, and a light beam emitted from the light source by reflecting the light emitted from the light source on a reflective surface provided on a bowl-shaped inner surface A reflecting mirror that changes to a parallel light beam toward the mouth, and a radiation direction of at least an upper portion of the parallel light beam that is disposed in the vicinity of the opening of the light beam emission port in the exterior cylindrical body and that travels from the reflection mirror toward the light beam emission port. A light emitting device comprising an optical system member that is refracted forward and obliquely downward, and
An operation controller for controlling the operation of the light emitting device;
A power supply for supplying power to the light emitting device and the operation control unit,
The optical system member is a prism portion in which one surface is arranged perpendicular to the parallel light beam and the other surface has an angle α with respect to the one surface, and α is configured to satisfy the following formula: and emergency wide illumination device characterized in that is.
n = sin (α + β) ÷ sinα
Here, n is the refractive index of the prism portion, α is the apex angle formed by the light incident surface and the light exit surface of the prism portion, and β is the refractive angle of the prism portion. The light source is a discharge lamp comprising a xenon lamp,
When the operation control unit detects a seismic intensity of a predetermined value or more, an earthquake detection sensor that outputs an earthquake detection signal, an illuminance measuring device that outputs a nighttime detection signal when detecting an illuminance of a predetermined value or less, and the earthquake 3. A controller according to claim 1, further comprising a controller that performs control to activate the power supply device to drive the discharge lamp when the sensing signal and the nighttime detection signal are input together. Emergency wide area lighting device.