Road closure signs and road closure sign systems

Abstract

To provide a road closure display body and road closure display system capable of eliminating the need to transport a gate to the front of an entrance of an underpass, and of quickly displaying the traffic closure of the underpass.SOLUTION: A road closure display body 100 is formed by attaching a road closure or a corresponding sign to a sheet. The sheet 60 is wound and accommodated in a recess 20 in a road surface 14 in front of an entrance 11 of an underpass 10. During an emergency, the sheet 60 is rolled out from the recess 20 onto the road to prohibit entry into the underpass 10.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a road closure sign and a road closure sign system. [Background technology]

[0002] Heavy rains, typhoons, and the resulting river flooding cause water levels to rise on roads, leading to frequent natural disasters such as water seeping into underpasses and flooding, and this flooding damage is said to be a man-made disaster caused by global warming. Because flooding can occur while vehicles are passing through an underpass, which can lead to vehicles becoming trapped inside, it is necessary to prohibit vehicles from entering the underpass before it becomes flooded.

[0003] The most common measure to prohibit entry into an underpass is an electronic signboard installed on a pole (telephone pole) in front of the underpass entrance, which displays a message such as "Road Closed Ahead" and guides people to a detour. In places where there is no electronic signboard in front of the underpass entrance, a gate with a message such as "Road Closed" or an equivalent sign is manually transported to the road surface and installed as a no-entry measure.

[0004] Patent Document 1 proposes a traffic safety device that uses a pair of utility pole advertising towers installed on a pair of utility poles near the intersection of two roads. This traffic safety device includes a display device that is attached to the utility pole so as to be visible from the direction of approaching the intersection and that displays a visible image based on image data, a transmitter / receiver that transmits and receives information to and from another utility pole advertising tower installed on the side of the road that is in a blind spot, object detection means that performs proximity detection to detect when an object heading towards the intersection approaches to within a predetermined distance before the intersection and arrival detection to detect when the object has reached the intersection, information provision means that transmits and outputs a warning start signal in response to the proximity detection and a warning end signal in response to the arrival detection from the transmitter / receiver to the other utility pole advertising tower, advertising display means that displays advertising information on the display device, and warning display means that switches the display on the display device from advertising information to warning information during the period from when the transmitter / receiver receives the warning start signal to when the transmitter / receiver receives the warning end signal. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-191861 Summary of the Invention [Problem to be solved by the invention]

[0006] In conventional warning displays using electronic signboards, including the traffic safety device described in Patent Document 1, the letters are displayed electronically on an electronic signboard located above the road in the direction of travel, and drivers often miss the display. Therefore, when an underpass is actually flooded, in addition to the display on the electronic signboard, the above-mentioned gates are generally transported and installed on the road surface. However, transporting and installing gates by hand takes time and effort, and there is a risk that the gates cannot be installed in time before the underpass is flooded.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a road closure indicator and a road closure display system that eliminate the need to transport a gate to the entrance of an underpass and can quickly display a road closure sign to the underpass in a manner that is difficult to overlook. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the road closure sign according to the present invention is: A road closure or equivalent sign is attached to the sheet to form a road closure sign, The sheet is wound up and stored in a recess in the road surface just before the entrance to the underpass, and in an emergency, the sheet is rolled out from the recess onto the road, prohibiting entry into the underpass.

[0009] According to this aspect, a sheet bearing a sign such as "Road Closed" is stored in a rolled-up state in a recess in the road surface just before the underpass entrance, and in an emergency the sheet is rolled out from the recess onto the road to prohibit entry into the underpass, thereby eliminating the need to transport a gate just before the underpass entrance and enabling a sign to be quickly posted that the underpass is closed. Also, unlike conventional displays using electronic bulletin boards, the sheet bearing the sign "Road Closed" is deployed above the road surface, eliminating the risk of vehicle drivers overlooking the sign.

[0010] Here, "underpass" includes the lower road at an intersection that is dug down, a road that passes under the intersection, and a tunnel-type underground passage. "Emergency" means when there is a possibility of flooding of the underpass or when the underpass is already flooded. Furthermore, "signs equivalent to road closures" include signs indicating the expected time period of road closures and signs regarding detour routes.

[0011] It is desirable that the sheet be deployed only on the road of the lane of travel leading to the underpass, so that in an emergency, the oncoming lane can be used as a lane for emergency vehicles and the like.

[0012] In another aspect of the road closure sign according to the present invention, The road no-entry indicator includes a belt-shaped lid extending in the longitudinal direction of the recess, a plurality of links supporting the lid, and the sheet, a portion of which is fixed to the lid, When the link is folded, the road closure indicator is housed in the recess, and the lid closes the opening of the recess, When the link is unfolded, the lid is lifted upward from the recess, and the seat is unfolded.

[0013] According to this aspect, the strip-shaped lid can be raised and lowered by folding and unfolding multiple links, and the sheet, a portion of which is fixed to the lid, is stored in a recess as the lid moves up and down and is unfolded above the recess, thereby making it possible to form a road no-entry sign with excellent retention capabilities for the unfolded sheet, while eliminating the need to construct a strip-shaped recess deep below the road surface.

[0014] In addition, it is preferable that the link be configured so that the height when unfolded (height of the unfolded seat) can be adjusted freely, and it is desirable that the link be unfolded to a suitable height that is easily visible to the driver and adjusted so that the seat can be unfolded, depending on the slope of the road surface and the visibility conditions when the seat is unfolded.

[0015] The multiple links can be deployed or folded manually or automatically, but even in the case of manual deployment, the links can be deployed by, for example, lifting a cover housed in a recess via a manually rotated gear or the like, and the sheet can be unfolded at the same time, making it possible to quickly deploy the sheet in front of the underpass entrance with a small number of personnel. Furthermore, at the very least, there is no need for manual transportation to the installation location as in the past, so the effort and time required to deploy the sheet is still significantly reduced.

[0016] In another aspect of the road closure sign according to the present invention, The four links form a pantograph, and a plurality of the pantographs are folded and unfolded in the longitudinal direction.

[0017] According to this aspect, the four links form a pantograph, and by deploying the multiple pantographs above the recess, the belt-shaped lid can be raised vertically upward as the pantographs deploy, and the seat can be stably supported by the lid and the pantographs. Here, the number of pantographs provided can range from one to multiple, depending on the longitudinal length of the belt-shaped lid.

[0018] In another aspect of the road closure sign according to the present invention, The two links are assembled in an X shape around a pivot axis to form an X-shaped body, and the X-shaped bodies are folded in the longitudinal direction and then unfolded.

[0019] According to this aspect, two links are assembled in an X shape around a pivot axis to form an X-shaped body, and multiple X-shaped bodies are deployed above the recess, so that the strip-shaped lid can be raised vertically upward as the X-shaped bodies are deployed, allowing the lid and the X-shaped bodies to stably support the sheet.

[0020] Another aspect of the road closure sign according to the present invention is A road closure or equivalent sign is attached to the sheet to form a road closure sign, The sheet is wound around and fastened to the crossbar of a frame body equipped with an electric signboard, which is attached in front of the entrance to the underpass, and in an emergency, the sheet is unrolled onto the road below, prohibiting entry into the underpass.

[0021] According to this aspect, a sheet bearing a sign such as "Road Closed" is wound around and fastened to the horizontal rail of a frame body equipped with an electronic signboard that is attached in front of the entrance to the underpass, and in an emergency the sheet is rolled out onto the road below to prohibit entry into the underpass, thereby eliminating the need to transport a gate to the entrance to the underpass and enabling a sign to be quickly posted that the underpass is closed. In particular, unlike conventional electronic signboard displays, the sheet bearing a sign such as "Road Closed" is deployed at a height closer to the road surface, so drivers will not miss the sign.

[0022] Another aspect of the road closure sign according to the present invention is A vertical guide is provided on the support column of the frame body, The sheet is wound downward along the guide.

[0023] According to this aspect, the sheet is unwound downward along the vertical guides provided on the support pillars of the frame body, so that the sheet can be unwound downward stably and unfolded.

[0024] Another aspect of the road closure sign according to the present invention is The sheet is characterized in that it is a water-permeable sheet.

[0025] According to this aspect, the sheet is permeable to water, so that even if the water level on the road rises to the level at which the sheet is placed, the sheet is permeable to water, and thus it is possible to prevent the sheet from being pushed by water pressure and being unable to maintain its deployed position. Examples of the water-permeable sheet include a resin sheet with many holes, a mesh sheet, and a woven sheet with a relatively coarse mesh.

[0026] Another aspect of the road closure sign according to the present invention is The sheet feeder is characterized by further comprising an actuator for unwinding the sheet.

[0027] According to this aspect, the actuator unwinds the sheet, so that the sheet can be unwound in the shortest possible time in an emergency. Here, the actuator includes various types such as an electric motor, a motor including a servo motor or a linear motor, a hydraulic cylinder, a pneumatic cylinder, a water pressure cylinder, an electric cylinder, etc.

[0028] Furthermore, one aspect of the road closure display system according to the present invention is The road closure indicator; a user terminal; the actuator includes a first communication unit and an actuator driving unit; The user terminal is characterized by including a second communication unit capable of wirelessly communicating with the first communication unit, and a drive control unit that executes drive control of the actuator drive unit.

[0029] According to this aspect, the road no entry indicator is equipped with an actuator that automatically unrolls the sheet by, for example, driving a link, and by performing drive control of the actuator via wireless communication from a user terminal, it becomes possible, for example, from a remote road management facility, to quickly unroll the sheet of the road no entry indicator installed in front of the entrance to an underpass that is under management, and issue an alert that entry into the underpass is prohibited.

[0030] In another aspect of the road closure display system according to the present invention, The user terminal is characterized by further comprising an information acquisition unit that acquires heavy rain information or flood information for the area in which the road closure display is installed.

[0031] According to this aspect, by further comprising an information acquisition unit that acquires heavy rain or flood information for the area where the road closure display is installed, the sheet can be reliably unrolled before the underpass being monitored becomes flooded. [Effects of the Invention]

[0032] As can be understood from the above explanation, the road closure indicator and road closure display system of the present invention eliminate the need to transport a gate to the front of the underpass entrance, and can quickly display a road closure sign to the underpass in a manner that is difficult to overlook. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is an external view of an example of an underpass, showing a state in which a road no-entry sign according to a first embodiment is housed in a recess in the road surface just before the entrance to the underpass. FIG. [Figure 2] FIG. 2 is a front view of the road no-entry sign according to the first embodiment, showing a state in which a sheet is unwound onto the road from a recess. [Figure 3] FIG. 1 is an external view of an example of an underpass, showing a state in which a sheet is unrolled onto the road. [Figure 4] FIG. 10 is a front view of the road no-entry sign according to the second embodiment, showing a state in which the sheet is unwound onto the road from the recessed portion. [Figure 5] FIG. 10 is an external view of an example of an underpass, showing a state in which a storage case constituting a road no-entry display device according to the third embodiment is installed on a frame body equipped with an electronic bulletin board, which is attached in front of the entrance to the underpass. [Figure 6] FIG. 11 is an enlarged view of a part of the frame body and a storage case that constitutes the road no-entry sign according to the third embodiment. [Figure 7] FIG. 11 is a front view of a road no-entry sign according to a third embodiment, showing a state in which the sheet is unwound onto the road from the storage case. [Figure 8] FIG. 1 is an external view of an example of an underpass, showing a state in which a sheet is unrolled onto the road. [Figure 9] 1 shows an example of the overall configuration of a road closure display system according to an embodiment, and also shows an example of the functional configuration of an actuator that unrolls a sheet of a road closure display body and a user terminal. [Figure 10]FIG. 2 is a diagram illustrating an example of a hardware configuration of a user terminal. DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, examples of road closure signs and road closure display systems according to the embodiments will be described with reference to the accompanying drawings. Note that in this specification and the drawings, substantially identical components may be designated by the same reference numerals to avoid redundant description.

[0035] [Road No. Indicator in the First Embodiment] First, an example of a road no-entry sign according to the first embodiment will be described with reference to Figures 1 to 3. Here, Figure 1 is an external view of an example of an underpass, showing a state in which the road no-entry sign according to the first embodiment is housed in a recess in the road surface just before the entrance to the underpass. Also, Figure 2 is a front view of the road no-entry sign according to the first embodiment, showing a state in which a sheet is unrolled onto the road from the recess, and Figure 3 is an external view of an example of an underpass, showing a state in which the sheet is unrolled onto the road.

[0036] The underpass 10 shown in the figure is the lower road of a grade-separated intersection, and is a four-lane road formed by box culverts. There are two lanes for vehicles traveling in the Y1 direction and two lanes for vehicles traveling in the oncoming direction.

[0037] In the illustrated underpass 10, the forward lane side is the entrance 11 of the underpass 10, and the oncoming lane side is the exit 12 of the underpass 10.

[0038] A recess 20 extending in the vehicle width direction is provided in the road surface 14 in front of the entrance 11 of the underpass 10, and a road no entry sign 100 is housed in the recess 20. As shown in Fig. 1, when there is no risk of flooding of the underpass 10, a strip-shaped cover 30 forming the road no entry sign 100 closes the recess 20, and the road surface 14 is open to traffic.

[0039] 2, the state in which the road no entry sign 100 is housed in the recess 20 is shown by a dot-dash line, and the state in which it is deployed on the road is shown by a solid line. The front view shown in FIG. 2 is a view of the road no entry sign 100 as seen from a vehicle traveling in the travel lane, and shows the pantograph 40 and other parts on the back side of the seat 60 (the underpass 10 side) in a see-through manner.

[0040] The road no entry sign 100 has a strip-shaped lid 30 extending in the longitudinal direction of the recess 20, a plurality of links 41 supporting the lid 30, and a sheet 60 whose upper end is fixed to the lid 30.

[0041] The strip-shaped lid 30 is made of metal or hard resin, and the ceiling may be provided with a pavement layer similar to that of the surrounding road. As shown by the dashed dotted line in Figure 1, when the road no-entry sign 100 is placed in the recess 20, the flat upper surface of the lid 30 closes the upper opening of the recess 20 and is configured to be flush with the road surface around the recess 20.

[0042] A pantograph 40 is formed by four links 41, and the legs of multiple pantographs 40 (two in the illustrated example) are fixed to the recess 20, and the tops are fixed to the underside of the lid 30 to support the lid 30. The pantograph 40 is stored in the recess 20 by folding in the longitudinal direction of the recess 20, and is unfolded upward to push the lid 30 upward in the X3 direction.

[0043] The pantograph 40 has an upper link mechanism and a lower link mechanism, each consisting of a pair of links 41, rotatably attached to a lower pivot shaft 42 fixed to the recess 20 and an upper pivot shaft 43 fixed to the lid 30, and the upper link mechanism and the lower link mechanism are rotatably attached to separate left and right pivot shafts 44, to which screw rods 45 are attached, so that the upper link mechanism and the lower link mechanism can be expanded and contracted by rotating the screw rods 45.

[0044] A motor 50 (an example of an actuator) is mounted on one end of the screw rod 45, and when driven by the motor 50, the screw rod 45 rotates in the X1 direction, and in response to the rotation of the screw rod 45, the upper link mechanism and the lower link mechanism move toward the center in the X2 direction, changing their position from the normal folded state shown by the dashed dotted line to the unfolded state shown by the solid line, thereby lifting the lid 30 upward in the X3 direction. The two motors 50 are designed to rotate synchronously.

[0045] Here, the actuator 50 to be applied may be a motor as shown in the illustration, or may be a cylinder mechanism such as a hydraulic cylinder, an air cylinder, or an electric cylinder, or a ball screw (mechanism), etc. Furthermore, instead of the illustrated example in which the screw rod 45 is rotated by the actuator 50, it may be rotated manually.

[0046] Even if the screw rod 45 is rotated manually, for example, by having two people rotate both screw rods 45 in sync, the road closure indicator 100 can be quickly deployed and the sheet 60 can be unrolled, eliminating the time and effort required to transport and set up a gate as in the past.

[0047] A sheet roll 61 on which a sheet 60 is wound is housed in the recess 20, and the end unwound from the sheet roll 61 is fixed to the lid 30. When the pantograph 40 is deployed, the lid 30 is lifted upward, causing the sheet 60 to be unwound from the sheet roll 61 and unfolded onto the road as shown in Figures 2 and 3. The height of the sheet 60 in the unfolded state shown in Figures 2 and 3 (the height lifted by the pantograph 40) is preferably set to a height that is easily visible to drivers of vehicles traveling in the travel lane.

[0048] Here, the sheet 60 is made of a water-permeable material, or as shown in the illustrated example, has a large number of water-permeable holes 62. Examples of water-permeable materials include a mesh-like resin sheet and a woven fabric sheet with a relatively coarse mesh.

[0049] Since the sheet 60 is water permeable, even if the water level on the road rises to the installation level of the sheet 60, the sheet 60 can be prevented from being pushed by water pressure and being unable to maintain the deployed position due to the water permeability of the sheet 60.

[0050] The front of the seat 60 is marked with a sign prohibiting entry into the underpass 10, such as "Road Closed Ahead."

[0051] As shown in Figure 3, a large sheet 60 is deployed at a level that is easily visible to the driver of the vehicle just before the entrance 11 of the underpass 10 in the travel lane, and an alarm is issued that the underpass 10 is closed to traffic. This allows the driver to recognize the prohibited state of the underpass 10 without overlooking the display, and to change direction of travel to the detour lane on the side in the Y3 direction, thereby avoiding the use of the underpass 10 that is flooded or at risk of being flooded.

[0052] Once the risk of flooding has been eliminated, the pantograph 40 is folded to lower the lid 30 and the sheet 60, and the no-entry display 100 is placed in the recess 20, and the opening of the recess 20 is closed with the lid 30, thereby returning the underpass 10 to its normal state where it can be used.

[0053] Furthermore, as shown in FIG. 3, by deploying the sheet 60 only on the road in the lane of travel of the lanes leading to the underpass 10, in an emergency, the oncoming lane can be used as a lane for emergency vehicles, etc., making it possible to rescue drivers of vehicles stranded in the flooded underpass 10, for example.

[0054] [Road No. Indicator according to the Second Embodiment] Next, an example of a road no-go sign according to a second embodiment will be described with reference to Fig. 4. Here, Fig. 4 is a front view of the road no-go sign according to the second embodiment, showing a state in which a sheet is unwound onto the road from the recessed portion.

[0055] The illustrated road no entry sign 100A differs from the road no entry sign 100 in that it includes an X-shaped element 70 instead of the pantograph 40.

[0056] X-shaped body 70 is formed by assembling two links 71 in an X shape around pivot shaft 72, and the legs of multiple (two in the illustrated example) X-shaped bodies 70 are fixed to recess 20, and the tops are fixed to the underside of lid 30 to support lid 30. X-shaped body 70 is accommodated in recess 20 by folding in the longitudinal direction of recess 20, and is unfolded upward to push lid 30 upward in the X6 direction.

[0057] The recess 20 is provided with a guide rail 74 that accommodates the wheels 73 at one end of each link 71 so that they can move freely in the longitudinal direction of the recess 20, and similarly, the lid 30 is provided with a guide rail 75 that accommodates the wheels 73 at the other end of each link 71 so that they can move freely in the longitudinal direction.

[0058] Motors 50 (an example of an actuator) are mounted on the rotation shafts 72 of the two links 71, and when the two links 71 are rotated in the X4 direction by the driving of the motors 50, the wheels 73 at the ends of each link 71 move toward the center in the X5 direction inside the guide rails 74, 75, changing their position from the normal folded state shown by the dashed dotted line to the unfolded state shown by the solid line, thereby lifting the lid 30 upward in the X6 direction. The two motors 50 are rotated synchronously.

[0059] Similar to the road closure display 100, the road closure display 100A can be quickly deployed without any personnel or with as few personnel as possible to warn vehicle drivers that the underpass 10 cannot be used.

[0060] [Road closure sign according to the third embodiment] Next, an example of a road no-entry sign according to a third embodiment will be described with reference to Figs. 5 to 8. Fig. 5 is an external view of an example of an underpass, showing a state in which a storage case constituting the road no-entry sign according to the third embodiment is installed on a frame body equipped with an electronic signboard, which is attached in front of the entrance to the underpass. Fig. 6 is an enlarged view of a part of the frame body and the storage case constituting the road no-entry sign according to the third embodiment. Fig. 7 is a front view of the road no-entry sign according to the third embodiment, showing a state in which a sheet is unrolled from the storage case onto the road. Fig. 8 is an external view of an example of an underpass, showing a state in which the sheet is unrolled onto the road.

[0061] A frame body 16 equipped with an electronic signboard 19 is provided in front of the entrance 11 of the underpass 10. The frame body 16 includes support posts 17 and a truss structure 18 extending horizontally, with the electronic signboard 19 mounted on the truss structure 18. Various road traffic information is displayed electronically on the electronic signboard 19, and in FIG. 5, information such as "Road Closed Ahead" is displayed.

[0062] A storage case 80 that forms road no-entry sign 100B is installed on the lower crosspiece of truss structure 18. Also, a guide 82 that guides sheet 60 as it is unwound from storage case 80 is attached to support post 17.

[0063] As shown in FIG. 6, a sheet roll 61 around which a sheet 60 is wound is housed inside a housing case 80, and a motor 50 (an example of an actuator) that unwinds the sheet 60 is also housed inside the housing case 80.

[0064] As shown in Fig. 7, when the motor 50 is driven in the X7 direction, the sheet 60 is unwound downward from the sheet roll 61 and spread out on the road as shown in Fig. 7 and Fig. 8. The height of the sheet 60 in the spread state shown in Fig. 7 and Fig. 8 should also be set to a height that is easily visible to the driver of a vehicle traveling in the lane of travel.

[0065] As shown in Figure 8, a large sheet 60 is deployed at a level that is easily visible to the driver of the vehicle just before the entrance 11 of the underpass 10 in the travel lane, and an alarm is issued that the underpass 10 is closed to traffic. This allows the driver to recognize the prohibited state of the underpass 10 without overlooking the display, and to change direction of travel to the detour lane on the side in the Y3 direction, thereby avoiding the use of the underpass 10 that is flooded or at risk of being flooded.

[0066] When the risk of flooding has been eliminated, the motor 50 is driven to lift and rewind the sheet 60, thereby returning the travel lane to its normal state where it is possible to pass through and the underpass 10 is in use.

[0067] [Road closure display system according to the embodiment] Next, an example of a water blocking system according to an embodiment will be described with reference to Fig. 9 and Fig. 10. Here, Fig. 9 shows the overall configuration of an example of a road closure display system according to an embodiment, and is a diagram showing an example of the functional configuration of an actuator that unrolls a sheet of a road closure display body and a user terminal, and Fig. 10 is a diagram showing an example of the hardware configuration of the user terminal.

[0068] 9, the road closure display system 400 includes a road closure display device 100 (100A, 100B) and a user terminal 200 provided by a road administrator or the like that manages the unwinding and rewinding of the sheet 60 of the road closure display device 100 (100A, 100B). The road closure display system 400 is formed by connecting the actuator 50 that unwinds and rewinds the sheet 60 of the road closure display device 100 (100A, 100B) and the user terminal 200 via a network 300. Examples of the user terminal 200 include a personal computer (PC), a tablet, a smartphone, etc.

[0069] The network 300 includes a public network such as the Internet, a wireless network such as a mobile phone network, a dedicated network such as a VPN (Virtual Private Network), a LAN (Local Area Network), and the like.

[0070] 10, the user terminal 200 includes a CPU 211, a main memory device 212, an auxiliary memory device 213, a communication IF (interface) 214, and an input / output IF 215, which are interconnected by a connection bus 216. The main memory device 212 and the auxiliary memory device 213 are computer-readable recording media. Note that the above components may be provided separately, or some of the components may not be provided.

[0071] The CPU 211 is also called an MPU (Microprocessor) or a processor, and may be a single processor or a multiprocessor. The CPU 211 is a central processing unit that performs overall control of the user terminal 200, which is made up of a computer. The CPU 211, for example, deploys a program stored in the auxiliary storage device 213 in an executable form in the working area of the main storage device 212, and controls peripheral devices through the execution of the program, thereby providing functions that meet a predetermined purpose.

[0072] The main memory device 212 stores computer programs executed by the CPU 211, data processed by the CPU 211, etc. The main memory device 212 includes, for example, a flash memory, a RAM (Random Access Memory), and a ROM (Read Only Memory). The auxiliary memory device 213 stores various programs and various data on a readable and writable recording medium, and is also called an external memory device. The auxiliary memory device 213 stores, for example, an OS (Operating System), various programs, various tables, etc. The OS includes, for example, a communication interface program that exchanges data with external devices connected via the communication IF 214. The external devices include, for example, an actuator 50 connected to a network.

[0073] The auxiliary storage device 213 is used, for example, as a storage area that supplements the main storage device 212, and stores computer programs executed by the CPU 211, data processed by the CPU 211, etc. The auxiliary storage device 213 is a silicon disk including nonvolatile semiconductor memory (flash memory, EPROM (Erasable Programmable ROM)), a hard disk drive (HDD: Hard Disk Drive), a solid state drive, etc. Examples of the auxiliary storage device 213 include drives for removable recording media such as CD drives, DVD drives, and BD drives, and examples of removable recording media include CDs, DVDs, BDs, USB (Universal Serial Bus) memories, and SD (Secure Digital) memory cards.

[0074] The communication IF 214 is an interface with the network 300 to which the user terminal 200 is connected. The communication IF 214 transmits drive signals and drive stop signals via the network 300 to the actuators 50 that constitute the road closure display members 100 (100A, 100B).

[0075] The input / output IF 215 is an interface for inputting and outputting data to and from devices connected to the user terminal 200. Input devices such as a keyboard, a touch panel, a mouse, or other pointing device, and a microphone are connected to the input / output IF 215. The user terminal 200 receives operation instructions and the like from an operator who operates the input device via the input / output IF 215. Output devices such as a display device, a liquid crystal display (LCD) or an organic electroluminescence (EL) panel, a printer, and a speaker are also connected to the input / output IF 215.

[0076] As shown in FIG. 9, the user terminal 200 provides various functions of at least a second communication unit 201, a drive control unit 202, and an information acquisition unit 203 by the execution of a program by a CPU 211.

[0077] On the other hand, the actuator 50 includes a first communication unit 51 and an actuator driving unit 52 .

[0078] A command signal from the drive control unit 202 of the user terminal 200 is transmitted to the first communication unit 51 of each actuator 50 via the second communication unit 201, and the actuator drive unit 52 executes control of the rotation of the links 41, 71 by the actuator 50, and automatic unwinding control of the sheet 60 is performed.

[0079] Furthermore, the information acquisition unit 203 of the user terminal 200 is configured to acquire heavy rain information and flood information for the area where the road closure display 100 (100A, 100B) is installed at any time. This information acquisition unit 203 issues an alarm to alert the road administrator before the underpass 10 is flooded, thereby making it possible to reliably unroll the sheet 60 of the road closure display 100 (100A, 100B) onto the road in an emergency.

[0080] The present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form. [Explanation of symbols]

[0081] 10: Underpass 11: Entrance 12: Exit 14: Road surface 15: Median strip 16: Frame body 17: Strut 18: Truss structure 19: Electronic bulletin board 20: Recess 30: Lid 40: Pantograph 41: Link 42, 43, 44: Rotating shaft 45:Screw rod 50: Actuator (motor) 51: First Communications Department 52: Actuator drive unit 60: Sheet 61: Sheet roll 62: Hole 70:X-shaped body 71: Link 72: Rotating shaft 73: Wheel 74,75: Guide rail 80: Storage case 82: Guide 100, 100A, 100B: Road closure sign 200: User terminal 201: Second Communications Department 202: Drive control unit 203: Information acquisition department 300: Network 400: Road closure display system

Claims

1. A road closure or equivalent sign is attached to the sheet to form a road closure sign, The sheet is wound around and fastened to a horizontal beam of a frame body equipped with an electronic signboard, which is attached in front of the entrance to the underpass. The road closure indicator is characterized in that the electronic bulletin board displays road closure or equivalent road traffic information in an electronic manner, and in the event of an emergency, the large sheet is rolled out onto the road below at a level that is easily visible to vehicle drivers, thereby prohibiting entry into the underpass.

2. A vertical guide is provided on the support column of the frame body, 2. The road no entry sign according to claim 1, wherein the sheet is unwound downward along the guide.

3. 3. The road no entry sign according to claim 1, wherein the sheet is a water-permeable sheet.

4. The road no entry sign according to claim 1 , further comprising an actuator that executes unwinding of the sheet.

5. The road closure indicator according to claim 4; a user terminal; the actuator includes a first communication unit and an actuator driving unit; A road closure display system characterized in that the user terminal is equipped with a second communication unit that is capable of wireless communication with the first communication unit, and a drive control unit that performs drive control of the actuator drive unit.

6. The road closure display system according to claim 5, wherein the user terminal further comprises an information acquisition unit that acquires heavy rain information or flood information for an area in which the road closure display is installed.

Images