Evacuation Guidance System

Abstract

To provide an evacuation guidance system for enabling people to safely evacuating.SOLUTION: An evacuation guidance system incudes: evacuation guidance display devices 4 each of which is arranged in an advance direction of a passage and has a light guide plate; and a disaster prevention display device 2 which performs control to display advance possible information indicating that advancing is possible on one surface of the light guide plate based on a fire occurrence signal received from a sensor 3, and to display advance impossible information indicating that advancing is impossible on the other surface of the light guide plate. The light guide plate is a transparent plate. The evacuation guidance display device 4 includes: first recessed parts provided on the one and the other surfaces of the light guide plate so as to display the advance possible information; first illumination parts for projecting light to the first recessed parts so as to display the advance possible information; second recessed parts for displaying the advance impossible information; and second illumination parts for projecting light to the second recessed parts so as to display the advance impossible information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an evacuation guidance system. [Background technology]

[0002] Conventionally, when a disaster occurs, evacuation guidance has mainly been provided by evacuation guide lights installed at emergency exits (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2009-300359 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in any facility, including large facilities where an unspecified number of people are present, even if people in the building are aware of a fire through emergency broadcasts or other means, it may be difficult for them to evacuate safely if they are not able to see the evacuation guide lights from their location.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide an evacuation guidance system that enables safe evacuation. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the evacuation guidance system described in claim 1 includes a display board device having a display board provided facing the proceeding direction of a passageway, and a control device that performs control to display proceeding possible information indicating that proceeding is possible on one side of the display board and to display proceeding impossible information indicating that proceeding is impossible on the other side of the display board based on a fire occurrence signal received from a fire alarm system. the display plate is a transparent plate, and the display plate device comprises a one-surface-side first recess and a one-surface-side second recess provided on the one surface side of the display plate, an other-surface-side first recess and an other-surface-side second recess provided on the other surface side of the display plate, a one-surface-side first illumination unit arranged on a first side surface of the one surface side and projecting light onto a second side surface of the one surface side facing the first side surface of the one surface side, a one-surface-side second illumination unit arranged on the second side surface of the one surface side and projecting light onto the first side surface of the one surface side, and a one-surface-side second illumination unit arranged on the first side surface of the other surface side, the one surface side first illumination section which projects light onto a second side surface of the other surface side opposed to a first side surface of the other surface side, and an other surface side second illumination section which is disposed on the second side surface of the other surface side and projects light onto the first side surface of the other surface side, wherein the first recess of the one surface reflects a portion of the light projected from the one surface side first illumination section towards the one surface side, thereby performing a display on the one surface according to the shape of the first recess, thereby displaying the progress possible information on the one surface, and the second recess of the one surface reflects a portion of the light projected from the one surface side second illumination section towards the one surface side, The first recess of the other surface reflects a portion of light projected from the other surface side first illumination unit toward the other surface side, thereby displaying the no-progress information on the one surface according to the shape of the second recess, the first recess of the other surface reflects a portion of light projected from the other surface side second illumination unit toward the other surface side, thereby displaying the no-progress information on the one surface ... according to the shape of the first recess, and the second recess of the other surface reflects a portion of light projected from the other surface side second illumination unit toward the other surface side, thereby displaying the no-progress information on the one surface according to the shape of the second recess. By displaying the information on the other side, the impossibility of proceeding is displayed on the other side, and when it is possible to proceed to one side of the display board, light is projected from the one side first lighting unit and light is not projected from the one side second lighting unit, when it is not possible to proceed to one side of the display board, light is not projected from the one side first lighting unit and light is projected from the one side second lighting unit, and when it is possible to proceed to the other side of the display board, light is projected from the other side first lighting unit,The light is not projected from the other surface side second illumination unit, and when the light cannot travel to the other surface of the display board, the light is not projected from the other surface side first illumination unit and the light is projected from the other surface side second illumination unit.

[0007] The evacuation guidance system according to claim 2 is the evacuation guidance system according to claim 1, The first recess on the one surface is characterized in that the point at which the transparent plate contacts the outside of the transparent plate in the first recess on the one surface is configured to approach the first side surface on the one surface side as it moves from the one surface to the other surface. Effect of the Invention

[0010] According to the evacuation guidance system described in claim 1, by displaying information indicating whether proceeding is possible on one side of a signboard provided facing the direction of travel of the passageway and information indicating whether proceeding is impossible on the other side of the signboard, for example, it is possible to make the signboard stand out, and since the information indicating whether proceeding is possible and the information indicating whether proceeding is impossible can be used to inform people of this, it is possible to evacuate safely. [Brief description of the drawings]

[0014] [Figure 1] 1 is a diagram showing a building to which a disaster prevention system according to an embodiment of the present invention is applied; [Diagram 2] FIG. 2 is a front view showing an installation state of the evacuation guidance display device. [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a block diagram showing the functions of the disaster prevention display device. [Diagram 5] FIG. 11 is a diagram illustrating an example of facility information. [Figure 6] FIG. 2 is a block diagram showing functions of the evacuation guidance display device. [Figure 7] FIG. 2 is a front view of the evacuation guidance display device in a state in which progress information is displayed. [Figure 8] FIG. 11 is a front view of the evacuation guidance display device when impossible-to-proceed information is displayed. [Figure 9] 8 is a cross-sectional view of FIG. 7 taken along line B-B. [Figure 10] 8 is a cross-sectional view taken along CC in FIG. 7 . [Figure 11] 13 is a flowchart of an evacuation guidance process. [Figure 12] FIG. 1 is a diagram showing a building to which a disaster prevention system is applied. [Figure 13] FIG. 1 is a diagram showing a building to which a disaster prevention system is applied. [Figure 14]FIG. 1 is a diagram showing a building to which a disaster prevention system is applied. [Figure 15] FIG. 2 is a cross-sectional view of the evacuation guidance display device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an evacuation guidance system according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to the embodiment.

[0016] [Basic Concept of the Embodiment] First, a basic concept of the present embodiment will be described. The present embodiment generally relates to an evacuation guidance system.

[0017] An "evacuation guidance system" is a system for guiding evacuation, and more specifically, a system for guiding people to evacuate in the event of any disaster, including a fire or earthquake, and is equipped with, for example, a display board device and a control device.

[0018] A "display board device" is a device equipped with a display board provided facing the direction of travel of a passageway, and, for example, optionally equipped with a light shielding plate, a first recess, a first lighting unit, a second recess, and a second lighting unit.

[0019] Note that "provided facing the traveling direction of the passage" is a concept corresponding to, for example, providing a sign board so that it can be seen by people passing along the passage, and as an example, it is a concept corresponding to providing the sign board along a direction intersecting the passage (for example, a direction perpendicular to the passage). Also, "provided facing the traveling direction of the passage" is a concept corresponding to providing a sign board so that, for example, a person passing along the passage in a first direction toward the sign board can see one side of the sign board, and a person passing along the passage in a second direction (the opposite direction to the first direction) toward the sign board can see the other side of the sign board (the side opposite to the one side).

[0020] The term "display board" is a concept that includes, for example, a transparent board (i.e., a transparent plate-like object) or a board of any color other than a transparent board. The term "display board" is also a concept that includes, for example, a board that has a first display board and a second display board that are arranged along the thickness direction of the display board. The term "display board" is also a concept that includes, for example, a board that is not composed of a first display board and a second display board that are arranged along the thickness direction of the display board, but is composed of a single board in the thickness direction.

[0021] When a display board is constructed using a first display board and a second display board, for example, a light blocking plate, which is an element of a display board device, may or may not be provided between the first display board and the second display board. The term "light blocking plate" refers to a plate that blocks light between the first display board and the second display board, and is a concept that includes, for example, a plate that blocks all light or a plate that blocks only part of the light.

[0022] The first recess, the first illumination unit, the second recess, and the second illumination unit are provided, for example, on one side and the other side of the display board. The "first recess" is, for example, a recess for displaying progress possible information. The "first illumination unit" is, for example, an illumination means for projecting light into the first recess to display progress possible information. For example, the "second recess" is, for example, a recess for displaying progress impossible information. Also, the "second illumination unit" is, for example, an illumination means for projecting light into the second recess to display progress impossible information.

[0023] The color of the light projected by the first illumination section and the color of the light projected by the second illumination section may be the same color or may be different colors.

[0024] The "control device" refers to a control means that performs control to display proceeding possible information indicating that proceeding is possible on one side of the display board, and to display proceeding impossible information indicating that proceeding is impossible on the other side of the display board, based on a fire outbreak signal received from a fire alarm system.

[0025] The "progression possible information" is, for example, information indicating that safe progress is possible when a fire occurs, and is a concept including, for example, information for guiding evacuating people to move in a direction away from the fire source. The "progression impossible information" is, for example, information indicating that safe progress is impossible when a fire occurs, and is a concept including, for example, information for preventing evacuating people from moving in a direction toward the fire source (i.e., information for discouraging evacuating people from moving in a direction toward the fire source). The "progression possible information" and "progress impossible information" may be in any format as long as they comply with the above definition, and are concepts including, for example, text format, image format, or symbol format (i.e., an arrow mark or an "x" mark). The display colors of these pieces of information are arbitrary, and may be different colors from each other, or may be the same color from each other.

[0026] Furthermore, the "control device" may be realized, for example, by a disaster prevention receiver or a disaster prevention display device, or may be realized by implementing the function of a control device in any device other than these devices (for example, a personal computer or a server computer, etc.). Note that a "disaster prevention receiver" is, for example, a device that manages a monitored area, and is a concept that includes, for example, devices that perform disaster prevention such as fire prevention. A "disaster prevention display device" is a device that displays the status of a monitored area. A "monitored area" is an area that is the subject of monitoring, and is a concept that includes, for example, any area within a building or any area outside a building, etc.

[0027] A "fire alarm system" is equipment for reporting the occurrence of a fire, and is a concept that includes, for example, sensors and transmitters. A "detector" is a device that detects the occurrence of a fire in a monitored area and reports the occurrence of a fire, and is a concept that includes, for example, devices that detect fires based on smoke or heat. A "transmitter" is a device that reports a fire in a monitored area, and is a concept that includes, for example, a device equipped with a push button that reports the occurrence of a fire when pressed.

[0028] The "fire occurrence signal" is a signal indicating that a fire has occurred, and is a concept that includes, for example, a signal transmitted from a fire alarm system to a control device.

[0029] In the embodiment described below, the "monitoring area" is an area inside a building, and the "control device" is realized using a disaster prevention display device.

[0030] [Specific details of the embodiment] Next, the specific contents of the embodiment will be described.

[0031] (composition) First, the configuration of the disaster prevention system according to the present embodiment will be described. Fig. 1 is a diagram showing a building to which the disaster prevention system according to the present embodiment is applied, Fig. 2 is a front view showing an installation state of an evacuation guidance display device, and Fig. 3 is a cross-sectional view taken along line AA in Fig. 2.

[0032] In the cross-sectional view, hatching of the cross section is omitted (similar to other cross-sectional views). In addition, the disaster prevention receiver 1 and the disaster prevention display device 2 in Fig. 1 are actually installed in any section (e.g., a disaster prevention room, etc.) in a building, and the communication line L1 is actually installed in the building, but in Fig. 1, at least a part of it is shown outside the building for convenience of explanation.

[0033] Note that the X-Y-Z directions shown in Figs. 1 to 3 are perpendicular to each other; specifically, the X direction is the horizontal direction, the +X direction is referred to as the east side (the other side), the -X direction is referred to as the west side (one side), the Y direction is the horizontal direction, the Z direction is the vertical direction, the +Z direction is referred to as the upper side, and the -Z direction is referred to as the lower side.

[0034] The disaster prevention system 100 in Fig. 1 is an evacuation guidance system, specifically, a system for performing disaster prevention regarding a fire in the building in Fig. 1, and is applied to the building. The building is, for example, a three-story commercial facility, and as shown in Fig. 1, emergency stairs used for evacuation in the event of a fire are provided on the east side (+X direction) and the west side (-X direction). Note that, unless specifically shown in Fig. 1, an emergency exit for evacuating to the outside of the building is provided at the position where the emergency stairs are provided on the first floor of the building.

[0035] The disaster prevention system 100 in Fig. 1 includes, for example, a disaster prevention receiver 1, a disaster prevention display device 2, a sensor 3, and an evacuation guidance display device 4. Note that, although a plurality of sensors 3 and evacuation guidance display devices 4 in Fig. 1 are provided on each floor, only representative ones are shown in the figure.

[0036] (Configuration: Disaster prevention receiver) 1 is a device that performs various processes related to disaster prevention when it receives a fire occurrence signal from a detector 3, and is capable of communicating with various devices (such as the detector 3, the evacuation guidance display device 4, and the disaster prevention display device 2) via a communication line L1, for example. The specific configuration of this disaster prevention receiver 1 is arbitrary, and a known configuration can be applied, so detailed description will be omitted.

[0037] (Configuration-disaster prevention display device) Fig. 4 is a block diagram showing the functions of the disaster prevention display device. The disaster prevention display device 2 in Fig. 1 is the above-mentioned control device, and is capable of communicating with various devices (sensor 3, evacuation guidance display device 4, disaster prevention receiver 1, etc.) via a communication line L1. The disaster prevention display device 2 is also capable of directly communicating with the evacuation guidance display device 4 via the communication line L1 without going through the disaster prevention receiver 1. The disaster prevention display device 2 also has known functions such as a function of displaying various information related to disaster prevention (for example, information showing the location of a fire, or information about fire extinguishing equipment, etc.), but here, the description of the known functions will be omitted as appropriate, and functions related to the features of the present application will be described.

[0038] The disaster prevention display device 2 includes a communication unit 21, a display unit 22, an operation unit 23, a recording unit 24, and a control unit 25, as shown in FIG.

[0039] (Configuration-Disaster Prevention Display Device-Communication Department) 4 is a communication unit that communicates with external devices (i.e., each device included in the disaster prevention system 100). The specific type and configuration of the communication unit 21 are arbitrary, but it can be configured, for example, using a known communication circuit (the same applies to the communication units of other devices).

[0040] (Configuration-disaster prevention display device-display section) 4 is a display unit that displays various information. The specific type and configuration of the display unit 22 are arbitrary, but it can be configured using a display such as a known liquid crystal display or organic EL display, for example.

[0041] (Configuration - Disaster prevention display device - Operation section) The operation unit 23 in Fig. 4 is an operation means for inputting various information. The specific type and configuration of the operation unit 23 are arbitrary, but for example, it can be configured using known operation buttons, etc. Note that the operation unit 23 may be configured using a touch pad, a keyboard, a mouse, etc. instead of or together with the operation buttons.

[0042] (Configuration - Disaster prevention display device - Recording section) 4 is a recording means for recording programs and various data necessary for the operation of the disaster prevention display device 2, and is configured using, for example, a flash memory or a hard disk. However, instead of or together with the flash memory or hard disk, any other recording medium including a magnetic recording medium such as a magnetic disk, or an optical recording medium such as a DVD or a Blu-ray disk can be used (the same applies to the recording units of other devices).

[0043] The recording unit 24 stores, for example, map information and facility information.

[0044] (Configuration - Disaster prevention display device - Recording section - Map information) "Map information" is, for example, information that identifies, as a map, a floor plan of the interior of a building to which the disaster prevention system 100 is applied, such as information that identifies a map such as a floor plan of each floor (i.e., a floor plan that identifies the positional relationship of each section (corridors, rooms, emergency stairs, etc.) on each floor). The specific method of storing such map information is arbitrary, but, for example, when map information is input to the disaster prevention display device 2 using any method (e.g., a method of inputting information using a recording medium such as a memory stick, or a method in which the administrator transmits and inputs information from his / her own terminal), the control unit 25 stores the map information (the same applies to facility information described later).

[0045] (Configuration - Disaster prevention display device - Recording section - Equipment information) "Facility information" is information that identifies each piece of equipment, which is each device included in the disaster prevention system 100. Fig. 5 is a diagram illustrating an example of facility information. For example, as shown in Fig. 5, this facility information associates information corresponding to the item "facility ID," information corresponding to the item "facility type information," and information corresponding to the item "installation location information" with each other.

[0046] The information corresponding to the item "facility ID" is facility identification information (identification information is also referred to as "ID") for uniquely identifying each facility. This facility ID is arbitrary, but for example, a facility ID is set for each of the detector 3 and the evacuation guidance display device 4, and this facility ID is recorded. In FIG. 5, for example, "ID311" to "ID316" for uniquely identifying the detectors 311 to 316 in FIG. 1, and "ID411" to "ID413" for uniquely identifying the evacuation guidance display devices 411 to 413 in FIG. 1 are stored. The information corresponding to the item "facility type information" is facility type information for identifying the type of the facility (in FIG. 5, "detector" for identifying the type of the detector 3, and "evacuation guidance display device" for identifying the type of the evacuation guidance display device 4).

[0047] The information corresponding to the item "Installation location information" is installation location information that specifies the location where each piece of equipment is installed. This installation location information is arbitrary, but for example, in FIG. 5, a case will be described in which information is stored that specifies the floor number on which each piece of equipment is installed, each section, and the position within the section. For example, it will be described that an evacuation guidance display device 411 is provided near the center of a first passage (see FIG. 2 and FIG. 3) that runs along the east-west direction (X direction) on the first floor of the building in FIG. 1, a sensor 311 is provided on the west side (-X direction) of the first passage, and a sensor 312 is provided on the east side (+X direction) of the first passage (similar to the second and third floors of the building). In particular, it is assumed that this first passage (similar to the second and third floors of the building) leads to the emergency staircase on the west side (-X direction) and the emergency staircase on the east side (+X direction) shown in FIG. 1. In this case, the installation location information stored includes "1F, west side of first aisle" which specifies the first floor and the west side of the first aisle where the detector 311 is installed, and "1F, center of first aisle" which specifies the first floor and near the center of the first aisle where the evacuation guidance display device 411 is installed.

[0048] The information at the top of such equipment information (the combination of "ID311," "detector," and "1st floor, west side of first aisle") indicates that the type of detector 311 identified by "equipment ID" = "ID311" is "detector" indicated by the "equipment type information," and that the location where detector 311 is installed is "1st floor, west side of first aisle" indicated by the "installation location information" (i.e., the west side of the first aisle on the first floor of the building).

[0049] (Configuration - Disaster prevention display device - Control unit) The control unit 25 in Fig. 4 is also a control means for controlling the disaster prevention display device 2, and is specifically a computer including a CPU, various programs interpreted and executed on the CPU (including basic control programs such as an OS, and application programs that are started on the OS and realize specific functions), and an internal memory such as a RAM for storing programs and various data (this also applies to control units of other devices). In particular, the control program according to the embodiment is installed in the disaster prevention display device 2 via an arbitrary recording medium or a network, thereby substantially configuring each unit of the control unit 25 (this also applies to control units of other devices). The processing performed by the control unit 25 will be described later.

[0050] (Configuration-sensor) The detector 3 in FIG. 1 is a device that detects and notifies the occurrence of a fire in the section in which it is installed, and is installed in each section on each floor, and includes, for example, detectors 311 to 316. The specific type and configuration of the detector 3 are arbitrary, but for example, the detector 3 includes a communication section, a recording section, and a control section, which are not shown. The recording section of the detector 3 stores an equipment ID for uniquely identifying the detector, and in particular, the recording sections of the detectors 311 to 316 store "ID311" to "ID316" as equipment IDs. When the control section of the detector 3 detects the occurrence of a fire using a known method (for example, a method of detecting based on smoke density), the control section of the detector 3 generates a fire occurrence signal including the equipment ID stored in the recording section of the detector 3, and transmits the generated fire occurrence signal to the disaster prevention receiver 1 to notify the occurrence of a fire.

[0051] (Configuration - Evacuation guidance display device) FIG. 6 is a block diagram showing the function of the evacuation guidance display device, FIG. 7 is a front view of the evacuation guidance display device in a state where the progress possible information is displayed, FIG. 8 is a front view of the evacuation guidance display device in a state where the progress impossible information is displayed, FIG. 9 is a BB cross-sectional view of FIG. 7, and FIG. 10 is a CC cross-sectional view of FIG. 7. Note that FIG. 7 and FIG. 8 show the evacuation guidance display device 4 in a state where it is seen from the +X direction to the -X direction of FIG. 1. In addition, with regard to FIG. 9 and FIG. 10, the shape, size, and number of each recess are actually adjusted arbitrarily so as to realize each function (function to display each information) described later, but here, they are illustrated for convenience in explaining the principle of the function. In addition, in FIG. 9 and FIG. 10, the light output from each lighting unit is illustrated by an arrow of a dashed line. Also, FIG. 9(a) and FIG. 9(b) show the same configuration, and show the lighting units outputting light in different states.

[0052] 1 is the above-mentioned display board device, and is provided on each floor, and includes, for example, evacuation guidance display devices 411 to 413. The installation method of this evacuation guidance display device 4 is arbitrary as long as it is provided facing the passageway travel direction, but for example, as shown in Fig. 2 and Fig. 3, a case will be described in which the evacuation guidance display device 4 is provided on the upper side (+Z direction) of each passageway and installed on a hanging wall 900 by any method (for example, a method using mounting brackets, a method of screwing, etc.).

[0053] The "hanging wall" 900 is, for example, a transparent plate-like member for smoke prevention, and is provided toward the traveling direction of each passage. Since the hanging wall 900 is transparent in this way, even if the evacuation guidance display device 4 is installed on the hanging wall 900, as shown in Figs. 2 and 3, the evacuation guidance display device 4 can be viewed from one side (+X direction) and the other side (-X direction). In particular, from one side (+X direction), it is possible to directly view one side (+X direction) of the evacuation guidance display device 4, and from the other side (-X direction), it is possible to view the other side (-X direction) of the evacuation guidance display device 4 through the transparent hanging wall 900.

[0054] The evacuation guidance display device 4 includes, for example, a communication unit 41, a recording unit 42, a control unit 43, the light guide plate 5 and an illumination unit 6 shown in FIG.

[0055] (Configuration - Evacuation guidance display device - Communication department) The communication unit 41 in FIG. 6 is a communication means for communicating with an external device (that is, each device included in the disaster prevention system 100).

[0056] (Configuration - Evacuation guidance display device - Recording unit) The recording unit 42 in Figure 6 is a recording means for recording programs and various data necessary for the operation of the evacuation guidance display device 4, and stores an equipment ID for uniquely identifying the device itself. In particular, the recording units 42 of the evacuation guidance display devices 411-413 store "ID411"-"ID413" as equipment IDs.

[0057] (Configuration - Evacuation guidance display device - Control unit) 6 is a control means for controlling the evacuation guidance display device 4. The process performed by the control unit 43 will be described later.

[0058] (Configuration - Evacuation guidance display device - Light guide plate) 7 to 10 is the above-mentioned display plate, and specifically, is provided facing the traveling direction of the passage. As shown in Fig. 7 and Fig. 8, the light guide plate 5 selectively displays progress possible information 401, progress impossible information 402, or fire occurrence information 403, and more specifically, selectively displays each of the above-mentioned information on both the surface of one side (+X direction) of the light guide plate 5 (specifically shown in Fig. 7 and Fig. 8) and the surface of the other side (-X direction) of the light guide plate 5 (specifically not shown).

[0059] The "progress possible information" 401 is the aforementioned progress possible information, for example, information for guiding evacuees to move away from the source of fire, and is information of an arrow mark (FIG. 7) for encouraging movement toward the evacuation guidance display device 4. The "progress impossible information" 402 is the aforementioned progress impossible information, for example, information for preventing evacuees from moving toward the source of fire, and is information of an "X" mark (FIG. 8) for discouraging movement toward the evacuation guidance display device 4. The "fire outbreak information" 403 is information for reporting that a fire has broken out in a building, and is, for example, a flame mark and text information saying "fire FIRE" (FIGS. 7 and 8).

[0060] The light guide plate 5 in Figures 7 to 10 displays the above-mentioned information based on the light output from the illumination unit 6, for example, and has a predetermined thickness as shown in Figures 9 and 10, and is a rectangular plate-like plate as shown in Figures 7 and 8, is transparent as a whole, and is made of any material such as resin or glass. The light guide plate 5 is provided with, for example, a recess 50 as shown in Figures 9 and 10.

[0061] (Configuration - Evacuation guidance display device - Light guide plate - Recess) The recesses 50 are depressions for reflecting the light output from the illumination units 6 and incident on the light guide plate 5 to one side (+X direction) and the other side (-X direction) of the light guide plate 5, thereby displaying the above-mentioned information on one side (+X direction) and the other side (-X direction) of the light guide plate 5, and have a reflective surface that reflects light from a predetermined one of the illumination units 6. The recesses 50 include, for example, a one-side first recess 51, a one-side second recess 52, a one-side third recess 53, a one-side first recess 54, a other-side second recess 55, and a other-side third recess 56, as shown in Figs. 9 and 10 .

[0062] The one-side first recess 51 (FIG. 9), the one-side second recess 52 (FIG. 9), and the one-side third recess 53 (FIG. 10) are for reflecting the light incident on the light guide plate 5 to one side (+X direction) of the light guide plate 5, thereby displaying the above-mentioned information on the surface of one side (+X direction) of the light guide plate 5. The one-side first recess 51 is for displaying the proceeding possible information 401 by reflecting the light from the one-side first illumination unit 61, for example, as shown in FIG. 9(a). The one-side second recess 52 is for displaying the proceeding impossible information 402 by reflecting the light from the one-side second illumination unit 62, for example, as shown in FIG. 9(b). The one-side third recess 53 is for displaying the fire occurrence information 403 by reflecting the light from the one-side third illumination unit 63, for example, as shown in FIG. 10.

[0063] The other-side first recess 54 (FIG. 9), the other-side second recess 55 (FIG. 9), and the other-side third recess 56 (FIG. 10) are for reflecting the light incident on the light guide plate 5 to the other side (−X direction) of the light guide plate 5, thereby displaying the above-mentioned information on the surface of the other side (−X direction) of the light guide plate 5. The other-side first recess 54 is for displaying the proceeding possible information 401 by reflecting the light from the other-side first illumination unit 64, for example, as shown in FIG. 9(b). The other-side second recess 55 is for displaying the proceeding impossible information 402 by reflecting the light from the other-side second illumination unit 65, for example, as shown in FIG. 9(a). The other-side third recess 56 is for displaying the fire occurrence information 403 by reflecting the light from the other-side third illumination unit 66, for example, as shown in FIG. 10.

[0064] (Configuration - Evacuation guidance display device - Lighting section) 7 to 10 is an illumination means for projecting light onto the recess 50 of the light guide plate 5 to display the above-mentioned information. The illumination section 6 includes, for example, a one-side first illumination section 61, a one-side second illumination section 62, a one-side third illumination section 63, a other-side first illumination section 64, a other-side second illumination section 65, and a other-side third illumination section 66.

[0065] The one-side first lighting section 61, the one-side second lighting section 62, and the one-side third lighting section 63 are one-side lighting means that output light to display each of the above-mentioned information on one side (+X direction) of the light guide plate 5, and the other-side first lighting section 64, the other-side second lighting section 65, and the other-side third lighting section 66 are other-side lighting means that output light to display each of the above-mentioned information on the other side (-X direction) of the light guide plate 5.

[0066] The one-side first illumination section 61 and the other-side first illumination section 64 are the above-mentioned first illumination sections, and are provided along the edge of the light guide plate 5 on the +Y side as shown in Figs. 7 and 8, for example, and a plurality of (plural) light sources that output blue light toward the -Y side are provided along the Z direction. In detail, the one-side first illumination section 61 is for displaying blue progress possible information 401 on the surface of the light guide plate 5 on one side (+X direction) by projecting blue light onto the one-side first recess 51 as shown in Fig. 9(a), for example. The other-side first illumination section 64 is for displaying blue progress possible information 401 on the surface of the light guide plate 5 on the other side (-X direction) by projecting blue light onto the other-side first recess 54 as shown in Fig. 9(b), for example.

[0067] The one-side second illumination section 62 and the other-side second illumination section 65 are the second illumination sections described above, and are provided along the edge of the light guide plate 5 on the -Y side as shown in Figs. 7 and 8, for example, and a plurality of (plural) light sources that output red light toward the +Y side are provided along the Z direction. In detail, the one-side second illumination section 62 is for displaying the no-go information 402 in red on the surface of the light guide plate 5 on one side (+X direction) by projecting red light onto the one-side second recess 52 as shown in Fig. 9(b), for example. The other-side second illumination section 65 is for displaying the no-go information 402 in red on the surface of the light guide plate 5 on the other side (-X direction) by projecting red light onto the other-side second recess 55 as shown in Fig. 9(a), for example.

[0068] The one-side third illumination section 63 and the other-side third illumination section 66 are provided along the edge of the light guide plate 5 on the -Z side, as shown in Fig. 7 and Fig. 8, for example, and a plurality of (plural) light sources that output red light toward the +Z side are provided along the Y direction. In detail, the one-side third illumination section 63 is for displaying the fire outbreak information 403 in red on the surface of the light guide plate 5 on one side (+X direction) by projecting red light onto the one-side third recess 53, as shown in Fig. 10, for example. The other-side third illumination section 66 is for displaying the fire outbreak information 403 in red on the surface of the light guide plate 5 on the other side (-X direction) by projecting red light onto the other-side third recess 56, as shown in Fig. 10, for example.

[0069] (process) Next, the evacuation guidance process among the disaster prevention processes executed by the disaster prevention system 100 configured as above will be described. FIG. 11 is a flowchart of the evacuation guidance process (in the following description of each process, steps are abbreviated as "S"), and FIG. 12 is a diagram showing a building to which the disaster prevention system is applied. The "evacuation guidance process" is, in outline, a process executed by the disaster prevention display device 2, and is, for example, a process for guiding evacuation when a fire occurs. The timing for executing this evacuation guidance process is arbitrary, but for example, when each device of the disaster prevention system 100 is powered on, repeated execution is started, and the description will begin from the point where execution of the evacuation guidance process has started. As shown in FIG. 12, the description will be given by taking as an example a case where a fire occurs on the west side of the first passage on the first floor of a building.

[0070] In SA1 of FIG. 11, the control unit 25 of the disaster prevention display device 2 judges whether or not a fire has occurred. Although the specific details are arbitrary, for example, the configuration is such that when the detector 3 detects a fire, the detector 3 transmits a fire occurrence signal including an equipment ID for identifying the detector 3 itself to the disaster prevention receiver 1, and when the disaster prevention receiver 1 receives the fire occurrence signal, the control unit 25 transmits fire occurrence information (information indicating that a fire has occurred) including the equipment ID included in the fire occurrence signal to the disaster prevention display device 2. If the control unit 25 of the disaster prevention display device 2 has not received the fire occurrence information, it judges that a fire has not occurred (NO in SA1) and repeatedly executes SA1 until it judges that a fire has occurred. If the control unit 25 has received the fire occurrence information, it judges that a fire has occurred (YES in SA1) and proceeds to SA2.

[0071] The processing here may be changed as desired. For example, the control unit 25 of the disaster prevention display device 2 may be configured to directly receive a fire occurrence signal from the detector 3, and then perform processing of SA1 based on whether or not the fire occurrence signal has been received.

[0072] Here, for example, as shown in Fig. 12, if a fire breaks out on the west side of the first passage on the first floor of a building, the detector 311 detects the fire and transmits a fire occurrence signal including its own facility ID "ID311" to the disaster prevention receiver 1, and when the disaster prevention receiver 1 receives the fire occurrence signal, it transmits fire occurrence information including "ID311" contained in the signal to the disaster prevention display device 2. In this case, the control unit 25 of the disaster prevention display device 2 receives the fire occurrence information including "facility ID" = "ID311" and determines that a fire has occurred (YES in SA1).

[0073] In SA2 in Fig. 11, the control unit 25 of the disaster prevention display device 2 specifies information to be displayed on the evacuation guidance display device 4 in Fig. 12. Fig. 13 is a diagram showing a building to which the disaster prevention system is applied. Although specific details are arbitrary, for example, a facility ID included in the fire occurrence information received in SA1 is acquired, and the facility information in Fig. 5 and the map information in the recording unit 24 in Fig. 4 are referenced to identify the location of the fire occurrence in the building based on the acquired facility ID, an evacuation route that allows people in the building to safely evacuate based on the identified location of the fire is identified, and information to be displayed on the evacuation guidance display device 4 is identified based on the identified evacuation route.

[0074] Here, for example, the "equipment ID"="ID311" included in the fire occurrence information received by SA1 is acquired, and the "installation location information"="1F, west side of the first passage" associated with the above-mentioned "equipment ID"="ID311" is specified by referring to the equipment information in FIG. 5, and the west side of the first passage on the first floor of the building indicated by the specified "installation location information="1F, west side of the first passage" is specified as the fire occurrence location by referring to the map information in the recording unit 24 in FIG. 4. Next, based on the specified fire occurrence location, for example, an arbitrary method (for example, a method for specifying an evacuation route by which people in a building can safely evacuate by referring to map information, for example, a method for specifying an evacuation route moving in a direction toward an emergency staircase or an emergency exit while moving away from the fire source, etc.) is used to specify an evacuation route R1 (that is, an evacuation route for evacuating from the west side (-X direction) to the east side (+X direction) on each floor) indicated by an arrow in FIG. 13, and information to be displayed on the evacuation guidance display device 4 is specified based on the specified evacuation route R.

[0075] As a method for identifying information to be displayed on the evacuation guidance display device 4 based on the evacuation route R, for example, a set of information of progress possible information 401 and fire occurrence information 403 shown in Fig. 7 (hereinafter also referred to as "progress possible set information"), or a set of information of progress impossible information 402 and fire occurrence information 403 shown in Fig. 8 (hereinafter also referred to as "progress impossible set information") is identified. For example, "progress possible set information" is identified as information to be displayed on one of the faces on one side or the other side of one evacuation guidance display device 4, and "progress impossible set information" is identified as information to be displayed on the other face (i.e., the face opposite to the face identified as the face displaying "progress possible set information").

[0076] In detail, for example, "progress possible set information" is specified as information to be displayed on one or the other side of the evacuation guidance display device 4 that is visible when the evacuation guidance display device 4 is viewed facing the direction of travel of the above-mentioned identified evacuation route (in the case of evacuation route R in FIG. 13, the direction from the west side (-X direction) to the east side (+X direction)), while "progress impossible set information" is specified as information to be displayed on the opposite side of the one or the other side of the evacuation guidance display device 4 (i.e., the side that is visible when the evacuation guidance display device 4 is viewed facing the opposite direction to the direction of travel of the above-mentioned identified evacuation route (in the case of evacuation route R in FIG. 13, the direction from the west side (-X direction) to the east side (+X direction))).

[0077] Here, for example, "progress possible set information" is specified as the information to be displayed on the other side (-X direction) of the evacuation guidance display devices 411-413, and "progress impossible set information" is specified as the information to be displayed on one side (+X direction) of the evacuation guidance display devices 411-413.

[0078] In SA3 in FIG. 11, the control unit 25 of the disaster prevention display device 2 performs a process of displaying information on the evacuation guidance display device 4. FIG. 14 is a diagram showing a building to which the disaster prevention system is applied. Specifically, although it is arbitrary, for example, an information display signal corresponding to the processing result of SA2 is generated, and the generated information display signal is transmitted to each evacuation guidance display device 4, thereby displaying the information specified in SA2 on the evacuation guidance display device 4. The "information display signal" is a signal for specifying the information to be displayed on each surface of each evacuation guidance display device 4, and is, for example, a signal including a facility ID for identifying the evacuation guidance display device 4 to be displayed, one-side display information indicating the information to be displayed on one surface of the evacuation guidance display device 4, and other-side display information indicating the information to be displayed on the other surface of the evacuation guidance display device 4.

[0079] As for the processing in detail, for example, in SA2, for the evacuation guidance display device 411, “progress possible set information” is identified as the information to be displayed on the surface on the other side (-X direction), and “progress impossible set information” is identified as the information to be displayed on the surface on one side (+X direction), so an information display signal (hereinafter also referred to as “first information display signal”) including “facility ID” = “ID411”, “one side display information” = “progress impossible set information”, and “other side display information” = “progress possible set information” is generated and transmitted to the evacuation guidance display device 4. Similarly, the evacuation guidance display devices 412-413 generate and transmit an information display signal (hereinafter also referred to as a "second information display signal") including "facility ID" = "ID412", "one side display information" = "progress impossible set information", and "other side display information" = "progress possible set information", and also generate and transmit an information display signal (hereinafter also referred to as a "third information display signal") including "facility ID" = "ID413", "one side display information" = "progress impossible set information", and "other side display information" = "progress possible set information".

[0080] On the other hand, the control unit 43 of the evacuation guidance display device 4 receives the information display signal transmitted from the disaster prevention display device 2, acquires the equipment ID contained in the received information display signal, and if the acquired equipment ID matches the equipment ID recorded in the recording unit 42, determines that the information display signal is for itself, acquires the "one-side display information" and "other-side display information" contained in the information display signal, and displays each piece of information based on the acquired information. Note that if the equipment IDs do not match each other, the information display signal is not for itself, so no control is performed.

[0081] Regarding the process of displaying each piece of information, when the acquired "one-side display information" is "progress impossible set information" (i.e., when the acquired "other-side display information" is "progress possible set information"), the control unit 43 of the evacuation guidance display device 4 outputs light from the one-side second lighting unit 62 and the other-side first lighting unit 64 as shown in FIG. 9(b), and outputs light from the one-side third lighting unit 63 and the other-side third lighting unit 66 as shown in FIG. 10, thereby displaying the "progress impossible set information" (i.e., the progress impossible information 402 and the fire outbreak information 403 shown in FIG. 8) on one side (+X direction) of the light guide plate 5 of the evacuation guidance display device 4, and also displays the "progress possible set information" (i.e., the progress possible information 401 and the fire outbreak information 403 shown in FIG. 7) on the other side (-X direction) of the light guide plate 5 of the evacuation guidance display device 4.

[0082] On the other hand, when the aforementioned acquired "one-side display information" is "progress possible set information" (i.e., when the aforementioned acquired "other-side display information" is "progress impossible set information"), the control unit 43 of the evacuation guidance display device 4 outputs light from the one-side first lighting unit 61 and the other-side second lighting unit 65 as shown in FIG. 9(a), and outputs light from the one-side third lighting unit 63 and the other-side third lighting unit 66 as shown in FIG. 10, thereby displaying the "progress possible set information" (i.e., the progress possible information 401 and the fire outbreak information 403 shown in FIG. 7) on one side (+X direction) surface of the light guide plate 5 of the evacuation guidance display device 4, and also displays the "progress impossible set information" (i.e., the progress impossible information 402 and the fire outbreak information 403 shown in FIG. 8) on the other side (-X direction) surface of the light guide plate 5 of the evacuation guidance display device 4.

[0083] Here, for example, when the control unit 43 of the evacuation guidance display device 411 receives the "first information display signal", it displays "progress impossible set information" on one side (+X direction) of the light guide plate 5 of the evacuation guidance display device 4, and displays "progress possible set information" on the other side (-X direction) of the light guide plate 5 of the evacuation guidance display device 4. Similarly, the control units 43 of the evacuation guidance display devices 412-413 also display "progress impossible set information" on one side (+X direction) of the light guide plate 5 of the evacuation guidance display device 4, and displays "progress possible set information" on the other side (-X direction) of the light guide plate 5 of the evacuation guidance display device 4. In this way, as shown in FIG. 14, the "progress impossible set information" (FIG. 8) is displayed on one side (+X direction) of each evacuation guidance display device 4, and the "progress possible set information" (FIG. 7) is displayed on the other side (-X direction), so that people in the building can be safely evacuated along the evacuation route R in FIG. 13. This ends the evacuation guidance process.

[0084] (Effects of the embodiment) In this manner, according to this embodiment, by displaying proceeding possible information 401 on one surface of the light guide plate 5 provided facing the travel direction of the passage (e.g., the first passage, etc.) and displaying proceeding impossible information 402 on the other surface of the light guide plate 5, for example, it is possible to make the light guide plate 5 stand out, and since the proceeding possible information 401 and the proceeding impossible information 402 can be used to inform people whether they can proceed or not, it becomes possible to evacuate safely.

[0085] Furthermore, by projecting light onto the first recess 51 on one side or the first recess 54 on the other side to display the proceeding possible information 401, and by projecting light onto the second recess 52 on one side or the second recess 55 on the other side to display the proceeding impossible information 402, the proceeding possible information 401 and the proceeding impossible information 402 can be made to stand out even in a relatively dark place, for example, making it possible to evacuate safely.

[0086] Furthermore, since the color of the light projected by the one side first lighting unit 61 and the other side first lighting unit 64 is different from the color of the light projected by the one side second lighting unit 62 and the other side second lighting unit 65, for example, the display colors of the progress possible information 401 and the progress impossible information 402 can be made different from each other, making it possible to intuitively know whether progress is possible or not.

[0087] [Modifications to the embodiment] Although the embodiment of the present invention has been described above, the specific configuration and means of the present invention can be modified and improved as desired within the scope of the technical ideas of each invention described in the claims. Such modifications will be described below.

[0088] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and may vary depending on the implementation environment of the invention and the details of the configuration, and may solve only some of the problems described above or achieve only some of the effects described above.

[0089] (Regarding decentralization and integration) In addition, the above-mentioned configuration is a functional concept, and does not necessarily have to be physically configured as shown in the figure. In other words, the specific form of distribution or integration of each part is not limited to that shown in the figure, and all or a part of it can be functionally or physically distributed or integrated in any unit. For example, by implementing some or all of the functions of the disaster prevention display device 2 described in the embodiment in the disaster prevention receiver 1, the disaster prevention receiver 1 can be used as the above-mentioned control device.

[0090] (About evacuation guidance display devices (part 1)) Also, the configuration of the evacuation guidance display device 4 in FIG. 9 may be changed arbitrarily. FIG. 15 is a cross-sectional view of the evacuation guidance display device. Note that FIG. 15 is a cross-sectional view corresponding to FIG. 9. Specifically, instead of the light guide plate 5 in FIG. 9, two light guide plates 501 and 502 may be provided with a light shielding plate 503 interposed therebetween, as shown in FIG. 15, to configure an evacuation guidance display device 4A. Note that this evacuation guidance display device 4A is the same as the evacuation guidance display device 4, except that the light guide plates 501 and 502 and the light shielding plate 503 are used instead of the light guide plate 5. The light guide plates 501 and 502 are a first display plate and a second display plate arranged along the thickness direction (X direction) of the light guide plates 501 and 502, and are the same as the light guide plate 5 in FIG. 9, except that two of them are provided. Further, the light shielding plate 503 is provided between the light guide plates 501, 502, blocks light between the light guide plates 501, 502, and is of any color (for example, white, black, green, etc.). In this configuration, the light shielding plate 503 provided between the light guide plates 501, 502 can prevent light from leaking between the light guide plates 501, 502, for example, and therefore can improve the visibility of the progress possible information 401 and the progress impossible information 402. The light shielding plate 503 may be configured to block all light, or may be configured to block a portion of light.

[0091] (About evacuation guidance display devices (part 2)) The configuration of the evacuation guidance display device 4 in Fig. 1 may be changed as desired. For example, the evacuation guidance display device may be configured by providing two known liquid crystal displays with their back sides (opposite to the side displaying information) facing each other.

[0092] (About evacuation guidance display devices (part 3)) 1 may be installed at any position other than the hanging wall 900, for example, may be installed on a pillar or beam using a mounting bracket, or may be installed in a state of hanging from the ceiling.

[0093] (Features) Furthermore, the features of the above-described embodiments and the features of the modifications may be combined in any manner.

[0094] (Additional Note) The evacuation guidance system of Appendix 1 comprises a display board device having a display board arranged facing the direction of travel of the passageway, and a control device that performs control to display, based on a fire occurrence signal received from a fire alarm system, on one side of the display board, progress possible information indicating that progress is possible, and on the other side of the display board, progress impossible information indicating that progress is impossible.

[0095] Moreover, the evacuation guidance system of Appendix 2 is the evacuation guidance system described in Appendix 1, wherein the display board is a transparent board, and the display board device comprises a first recess for displaying the proceeding possible information, a first lighting unit for projecting light into the first recess to display the proceeding possible information, a second recess for displaying the proceeding impossible information, and a second lighting unit for projecting light into the second recess to display the proceeding impossible information, the first recess being provided on each of the one side and the other side of the display board.

[0096] In addition, the evacuation guidance system of Supplementary Note 3 is the evacuation guidance system described in Supplementary Note 2, wherein the color of the light projected by the first lighting unit and the color of the light projected by the second lighting unit are different from each other.

[0097] Furthermore, the evacuation guidance system of Appendix 4 is an evacuation guidance system described in any one of Appendixes 1 to 3, wherein the display board comprises a first display board and a second display board arranged along the thickness direction of the display board, and the display board device comprises a shading board provided between the first display board and the second display board.

[0098] (Effect of supplementary notes) According to the evacuation guidance system described in Appendix 1, by displaying information indicating whether proceeding is possible on one side of a signboard provided facing the direction of travel of the passageway and information indicating whether proceeding is impossible on the other side of the signboard, for example, it is possible to make the signboard stand out, and since the information indicating whether proceeding is possible and the information indicating whether proceeding is impossible can be used to inform people of whether proceeding is possible or impossible, it is possible to evacuate safely.

[0099] According to the evacuation guidance system described in Appendix 2, by projecting light onto the first recess to display the information on possible progression, and by projecting light onto the second recess to display the information on impossible progression, it is possible to make the information on possible progression and the information on impossible progression stand out even in a relatively dark place, for example, thereby enabling safe evacuation.

[0100] According to the evacuation guidance system described in Appendix 3, the color of the light projected by the first lighting unit and the color of the light projected by the second lighting unit are different from each other, so that, for example, the display colors of information indicating whether proceeding is possible and information indicating whether proceeding is not possible can be made different from each other, making it possible to intuitively know whether proceeding is possible or not.

[0101] According to the evacuation guidance system described in Appendix 4, by providing a light shielding plate between the first display board and the second display board, for example, it is possible to prevent light from leaking between the first display board and the second display board, thereby improving the visibility of each of the proceeding possible information and the proceeding impossible information. [Explanation of symbols]

[0102] 1 Disaster prevention receiver 2 Disaster prevention display device 3 sensor 4 Evacuation guidance display device 4A Evacuation guidance display device 5 Light guide plate 6. Lighting Section 21 Communications Department 22 Display section 23 Control section 24 Recording Section 25 Control Unit 41 Communications Department 42 Recording Section 43 Control Unit 50 Recess 51 First recess on one side 52 Second recess on one side 53 Third recess on one side 54 Other side first recess 55 Second recess on other side 56 Third recess on other side 61 First lighting section on one side 62 Second lighting section on one side 63 Third lighting section on one side 64 Other side first lighting unit 65 Second lighting unit on the other side 66 Third lighting unit on the other side 100 Disaster Prevention System 311 Sensor 312 Sensor 313 Sensor 314 Sensor 315 Sensor 316 Sensor 401 Progress information 402 Information about not being able to proceed 403 Fire Information 411 Evacuation guidance display device 412 Evacuation guidance display device 413 Evacuation guidance display device 501 Light guide plate 502 Light guide plate 503 Shading plate 900 Hanging wall L1 communication line R Evacuation route

Claims

1. A display board device including a display board provided facing the travel direction of the passage; displaying, on one side of the display board, progress information indicating that progress is possible, based on a fire occurrence signal received from a fire alarm system; a control device that performs control to display impossibility of proceeding information on the other side of the display board, the impossibility of proceeding; Equipped with The display panel is a transparent panel, The display panel device includes: a first recess and a second recess provided on the one surface side of the display panel; an other-surface-side first recess and an other-surface-side second recess provided on the other surface side of the display panel; a one-surface-side first illumination unit that is disposed on a first side surface of the one surface side and projects light onto a second side surface of the one surface side that faces the first side surface of the one surface side; a one-surface-side second illumination unit that is disposed on a second side surface of the one surface side and projects light onto a first side surface of the one surface side; an other-surface-side first illumination unit that is disposed on a first side surface of the other surface side and projects light onto a second side surface of the other surface side that faces the first side surface of the other surface side; an other-surface-side second illumination unit that is disposed on a second side surface of the other surface side and projects light onto a first side surface of the other surface side; Equipped with The first recess on the one surface reflects a part of the light projected from the one surface side first illumination unit toward the one surface side, displaying the progress information on the one surface by performing a display on the one surface according to the shape of the first recess; The second recess on the one surface reflects a part of the light projected from the one surface side second illumination unit toward the one surface side, displaying the impossibility of proceeding information on the one surface by performing a display on the one surface according to the shape of the second recess; The first recess on the other surface reflects a part of the light projected from the other surface side first illumination unit toward the other surface, displaying the progress possible information on the other surface by performing a display on the other surface according to the shape of the first recess; The second recess on the other surface reflects a part of the light projected from the other surface side second illumination unit toward the other surface side, displaying the impossibility of proceeding information on the other surface by performing a display on the other surface according to the shape of the second recess; If it is possible to proceed to one side of the display board, Light is projected from the one surface side first illumination unit, and light is not projected from the one surface side second illumination unit; If it is not possible to proceed to one side of the display board, The one surface side first illumination unit is prevented from projecting light, and the one surface side second illumination unit is caused to project light; If it is possible to proceed to the other side of the display board, light is projected from the other surface side first illumination unit and light is not projected from the other surface side second illumination unit; If it is not possible to proceed to the other side of the display board, The other surface side first illumination unit is prevented from projecting light, and the other surface side second illumination unit is caused to project light. The evacuation guidance system is characterized by the above.

2. The first recess on the one surface is A portion where the transparent plate contacts the outside of the transparent plate in the first recess on the one surface is The first side surface of the one surface is closer to the first side surface of the one surface as the first side surface moves from the one surface to the other surface.

2. The evacuation guidance system according to claim 1,

Images