Safety fence for underground driveway using buoyancy

Abstract

To provide a safety fence for an underground driveway using buoyancy.SOLUTION: A safety fence 100 installed between vertical columns H constructed along a road of an underground driveway with specific intervals therebetween, includes: at least one air pocket 10 arranged between a pair of adjacent vertical columns H to each other such that upper ends are sealed through abutment on a ceiling surface of the underground driveway and opened lower ends are exposed downward; moving bodies 20 in which both side edges are connected to guide grooves 25a provided on respective one side surfaces of the pair of vertical columns opposite to each other so as to be vertically reciprocal; and at least one buoyant body 30 generating buoyancy to float on a water surface upon water immersion in the underground driveway, wherein the buoyant body 30 moves upward corresponding to a water level of flowing rain water upon the water immersion in the underground driveway, the moving body 20 moves upward along the guide groove 25a together with the buoyant body 30 moving upward to be stopped through abutment of the upper end of the moving body 20 moving upward on the lower end of the air pocket 10 opened downward.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a safety fence for an underground roadway. More specifically, when the underground roadway is flooded, the position of the fence that floats and is exposed above the water surface according to a rapid rise in the water level can be confirmed, and a driver, passenger, or pedestrian who has escaped from a flooded vehicle can grab the floating buoyancy body to request rescue or take shelter from the underground roadway to a safe area outside. The present invention relates to a safety fence for an underground roadway that utilizes buoyancy.

Background Art

[0002] Generally, an underground roadway is constructed and operated at a height lower than the ground in order to avoid above-ground structures.

[0003] Since a normal underground roadway is lower in height than the ground, if it rains, rainwater may collect in the underground roadway and there is a risk of flooding. Therefore, a catch basin for collecting and storing rainwater is installed, and a drainage pump for pumping rainwater to the outside for drainage is installed in the catch basin.

[0004] When a failure occurs in the drainage pump installed in the underground roadway or when a heavy rainstorm that exceeds the discharge volume of the drainage pump occurs and rainwater flows in, the rainwater accumulated in the catch basin flows back, and rainwater rapidly flows into the underground roadway side at a position lower than the ground, causing the underground roadway to be flooded. As a result, it has acted as a major cause of property damage due to vehicle flooding accidents and personal accidents of drivers who have escaped from or been unable to escape from flooded vehicles.

[0005] Therefore, in order to prevent the entry of vehicles or pedestrians into the underground roadway, which is vulnerable to sudden flooding due to heavy concentrated rainfall, a system that measures the water level of the underground roadway with an electrical sensor and blocks the entry of vehicles or gives an electrical warning before the underground roadway is flooded has been applied and operated in the underground roadway system.

[0006] However, such warning and cut-off systems may be disabled due to electric leakage, short circuit, power outage, etc. caused by rainwater in situations such as heavy rainstorms or typhoons. When the warning and system malfunction, there is a fatal problem that there is no way to inform vehicles and people outside the underpass of the flooded state of the underpass or to block entry.

[0007] Patent Document 1 (KR10-2423001 B1) discloses a device for warning of flooding of an underpass, which is configured such that when a buoyancy module floats during flooding of the underpass, a flooding warning rod moves from the inside of a through pipe in the upward direction, and the length of the tip at the upper end that appears outside the upper end of the underpass from the through pipe varies according to the degree to which the buoyancy module floats.

[0008] However, such a flooding warning device has the advantage of warning in advance to prevent the entry of vehicles and pedestrians into the flooded underpass even in a power outage state during flooding of the underpass. However, drivers or pedestrians of vehicles that have entered the inside of the underpass before flooding cannot evacuate from the underpass to the ground in the flooded state of the underpass where the water level rises rapidly and movement is difficult, so the risk of a fatal personal accident was very high.

Summary of the Invention

Problems to be Solved by the Invention

[0009] The present invention is for solving the above-mentioned problems, and the object of the present invention is that when the water level of the underpass rises due to a rapid inflow of water volume into the underpass, a buoyancy body that is a part of a fence structure floats and is maintained on the water surface according to the water level, so that the position of the fence can be confirmed, and a moving body that rises together with the buoyancy body can be grasped, or one can stand on it to request rescue or evacuate to an external safe area. The present invention provides a safety fence for an underpass that utilizes buoyancy.

[0010] Another object of the present invention is to provide a safety fence for an underground roadway using buoyancy that can ensure the upward movement of a buoyancy body that collides with water flowing in during flooding of the underground roadway, minimize the frictional resistance caused by the buoyancy body, and prevent damage to the structural facilities.

[0011] The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned should be clearly understood by those with ordinary knowledge in the technical field to which the present invention belongs from the following description.

Means for Solving the Problems

[0012] According to one aspect of the present invention, in a safety fence installed between vertical columns constructed at regular intervals along the road of an underground roadway, at least one air pocket disposed between a pair of adjacent vertical columns whose upper ends are in contact with and sealed to the ceiling surface of the underground roadway and whose open lower ends are exposed downward, a moving body whose both side edges are connected to be vertically reciprocally movable in guide grooves provided on each one side surface of a pair of vertical columns facing each other, and at least one buoyancy body that generates a buoyancy force that floats on the water surface when the underground roadway is flooded. The buoyancy body moves upward in accordance with the water level of rainwater flowing in when the underground roadway is flooded, the moving body moves upward along the guide groove together with the buoyancy body that moves upward, and the upper end of the moving body that moves upward comes into contact with and stops at the lower end of the air pocket that is open at the lower part. A safety fence for an underground roadway using buoyancy is provided.

[0013] At this time, it may include a connecting portion that connects between the moving body and the buoyancy body, and the connecting portion may include a pair of connecting ribs provided on the upper surface of the buoyancy body such that the lower end of the moving body is fitted and connected.

[0014] At this time, it may include a connecting portion that connects between the moving body and the buoyancy body, and the connecting portion may include a rotation support shaft of a certain length whose upper end is connected to the lower end of the moving body, and a rotation support hole formed through the upper surface of the buoyancy body and rotatably connected to the lower end of the rotation support shaft.

[0015] At this time, it may include a connecting portion that connects between the moving body and the buoyancy body, and the connecting portion may include a rotating support shaft of a certain length whose upper end is connected to the upper surface of the buoyancy body, and a rotating support hole that is formed through the lower end of the moving body and to which the upper end of the rotating support shaft is rotatably connected.

[0016] At this time, it may include an elastic body that is inserted and disposed on the outer surface of the rotating support shaft, whose upper end is fixed to the moving body, and whose lower end is fixed to the buoyancy body.

[0017] At this time, the moving body may include a stopper that extends by a certain length toward the end side of the buoyancy body so as to interfere with the end of the buoyancy body and limit the rotational movement of the buoyancy body.

[0018] At this time, the buoyancy body in contact with the upper surface of the moving body may include a restraint guide bar that is correspondingly inserted into the guide groove so as to move up and down along the vertical column on both side surfaces.

[0019] At this time, the guide groove may be provided as a linear groove that is recessed with a certain depth on one side surface of the vertical column, or may be provided as a linear groove formed in a vertical guide frame that is fixedly installed perpendicular to one side surface of the vertical column.

[0020] At this time, at least one transmitting member that transmits the position information of the air pocket corresponding to the outside during operation may be included inside the air pocket.

[0021] At this time, it may include at least one air supply line that is buried in the upper region of the underpass and supplies air, and the discharge end of the air supply line is communicated and connected to at least one supply hole formed through the air pocket, or is located at the lower end opening of the air pocket.

Advantages of the Invention

[0022] With the above configuration, the safety fence for an underpass using buoyancy according to the present invention, when the water level rises due to rainwater flowing into the inside of the underpass, moves a moving body in contact with a buoyancy body floating on the water surface upward together with the buoyancy body in accordance with the rising water level, and the moving body and the buoyancy body floating on the water surface can be visually confirmed. When the upper end of the moving body moving upward comes into contact with the upper end of the underpass and stops, drivers and pedestrians who have escaped from the vehicles inside the underpass that are starting to flood can visually confirm the position of the moving body, which is a fence structure, and at the same time grab or step on the moving body floating on the water surface and move to the entrance / exit side of the underpass to escape safely, so that personal accidents can be prevented.

[0023] Also, even if the water surface in the underpass rises to the ceiling surface, drivers and pedestrians who have escaped from the vehicle can breathe the air remaining inside the air pocket, and can also increase the survival rate even when the underpass is completely flooded. By transmitting the position of the air pocket to the outside, the position of the survivors can be accurately confirmed, and rescue activities for the survivors can be carried out quickly. On the other hand, by supplying air from the outside to the confirmed air pocket, the survival rate of the survivors can be increased until rescue.

[0024] Also, when the buoyancy body rotates and moves while colliding with the flowing water when water flows into the underpass during flooding, the flowing water can pass under the buoyancy body without obstructing the flow of the flowing water. Therefore, the frictional resistance generated between the moving body that moves upward together with the buoyancy body and the vertical column when the water level rises can be minimized, and thereby, the deformation and damage of the facility can be prevented while the buoyancy body and the moving body move upward stably.

[0025] The effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Brief Description of the Drawings

[0026] FIG. 1 is a schematic view showing the installation state of a safety fence for an underpass using buoyancy according to an embodiment of the present invention.

[0027] Figure 2 is a perspective view of a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0028] Figure 3 is an exploded perspective view of a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0029] Figure 4 is an exploded perspective view showing a buoyancy body of a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0030] Figure 5 is a perspective view of a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention, to which a rotary support shaft and an elastic body are applied.

[0031] Figure 6 is an exploded perspective view between a moving body and a buoyancy body to which a rotary support shaft and an elastic body are applied to a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0032] Figure 7 is a detailed view of a connecting portion composed of a rotary support shaft and an elastic body applied to a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0033] (a) of Figure 8 and (b) of Figure 8 are usage state diagrams of a buoyancy body applied to a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0034] (a) of Figure 9 and (b) of Figure 9 are usage state diagrams of another buoyancy body applied to a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0035] (a), (b), and (c) of Figure 10 are operating state diagrams of a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

Best Mode for Carrying Out the Invention

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it. The present invention can be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts not related to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

[0037] The words and terms used in this specification and claims are not construed as being limited to their ordinary or dictionary meanings, but rather, in accordance with the principle that the inventor can define terms and concepts in order to best explain his or her invention, are construed as meanings and concepts that conform to the technical idea of the present invention.

[0038] Therefore, the embodiments described in this specification and the configurations shown in the drawings correspond to one embodiment of the present invention and do not represent all of the technical ideas of the present invention. Thus, the corresponding configurations may have various equivalents and modifications that can replace them at the time of filing of the present invention.

[0039] As used in this specification, terms such as "comprising" or "having" are intended to describe the presence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0040] When a component is said to be "in front of," "behind," "above," or "below" another component, it is not limited to being directly in contact with and disposed "in front of," "behind," "above," or "below" the other component without any special circumstances, but also includes cases where other components are disposed in between. Also, when a component is said to be "connected" to another component, it is not limited to being directly connected to each other without any special circumstances, but also includes cases where they are indirectly connected to each other.

[0041] Hereinafter, with reference to the drawings, a safety fence 100 for an underground roadway using buoyancy according to an embodiment of the present invention will be described.

[0042] The safety fence 100 for an underground roadway using buoyancy according to an embodiment of the present invention is installed between vertical columns H that are perpendicularly constructed between the bottom surface and the ceiling surface of the underground roadway at regular intervals along the road of the underground roadway as shown in FIGS. 1, 2, 3, and 4. It can include an air pocket 10, a moving body 20, and a buoyancy body 30 to ensure the safe evacuation of drivers who have escaped from vehicles during flooding of the underground roadway and to increase the survival rate even during complete flooding of the underground roadway.

[0043] Referring to FIGS. 1, 2, and 3, the air pocket 10 is a box structure fixedly installed between a pair of adjacent vertical columns H whose upper ends are in contact with and sealed to the ceiling surface of the underground roadway.

[0044] Such an air pocket 10 can include a substantially hexahedral box structure whose upper end corresponding to the ceiling surface of the underground roadway is sealed and whose lower end corresponding to the road surface of the underground roadway is open and exposed downward.

[0045] At this time, the air pocket 10 can include a hexahedral box structure whose upper end edge corresponding to the ceiling surface of the underground roadway is in contact and sealed through a sealing material as a whole, and whose lower end is open.

[0046] Further, one side of the upper end, side, and lower end of the air pocket 10 is in contact with a bracket provided on the ceiling surface of the underground roadway, one side surface of the vertical column H, or a vertical guide frame 25 described later, and it is detachably provided by a plurality of fastening members.

[0047] At this time, the width of the air pocket 10 is preferably provided with a size substantially the same as the width of the vertical column H so as not to interfere with vehicles passing through the underground roadway.

[0048] Also, inside the air pocket 10, at least one transmitting member 12 that transmits the position information of the air pocket 10 installed on the outside to the underground roadway when a survivor presses or touches it can be included.

[0049] At this time, it is preferable that the transmitting member 12 is provided with its surface coated with a fluorescent agent so that its position can be confirmed even in a dark environment, or is installed on the inner surface of the air pocket 10 coated with a fluorescent agent.

[0050] Moreover, it includes at least one air supply line 16 buried in the upper region of the underpass, and includes at least one supply hole 15 formed through the outer surface of the air pocket 10 or the sealing surface of the air pocket 10 corresponding to the ceiling surface of the underpass. The discharge end of the air supply line 16 is communicated and connected with the supply hole 15 so as to supply air into the air pocket 10.

[0051] Thereby, even if the inside of the underpass is completely flooded by rainwater flowing into the underpass, the internal space of the air pocket 10 will be filled with air, and the survivors inside the underpass can breathe the air remaining in the air pocket 10.

[0052] By transmitting the position of the air pocket 10 to the outside together with the presence or absence of the survivors through the touch or pressing operation of the transmitting member provided inside the air pocket 10, the position of the survivors in the flooded underpass can be confirmed from the outside.

[0053] By forcibly supplying air into the corresponding air pocket 10 through the supply hole 15 of the corresponding air pocket 10 by the transmission signal of the transmitting member 12, the survival rate of the survivors can be further increased by the air supplied and filled inside the air pocket 10.

[0054] Here, the discharge end of the air supply line 16 is shown and described as being communicated and connected to the supply hole 15 formed through the ceiling surface of the air pocket 10 to supply air by button operation or in an emergency, but it is not limited to this. It can be communicated and connected to the supply hole 15 formed through one side surface of both side surfaces of the air pocket 10, or can be located at the lower end opening of the air pocket 10 to supply and fill air into the air pocket 10 from the outside.

[0055] Referring to FIGS. 1, 2 and 3, the moving body 20 is a substantially square frame-shaped fence structure whose both side edges are connected to be vertically reciprocally movable with respect to guide grooves 25a provided on each side surface of a pair of vertical columns H facing each other.

[0056] Such a moving body 20 includes upper horizontal members 21 made of square pipe materials having a substantially square cross section, and a pair of vertical members 23 connecting between both ends of lower horizontal members 22, and may include a wire net body 24 provided in a lattice form in a square frame composed of the upper horizontal members 21, the lower horizontal members 22 and the pair of vertical members 23.

[0057] Both side edges of the moving body 20 are inserted and arranged in guide grooves 25a of a vertical guide frame 25 provided on each side surface of a pair of vertical columns H facing each other, and are connected to be vertically movable.

[0058] The guide groove 25a may be provided in a formed groove form formed in a vertical guide frame 25 fixed and installed by a plurality of fastening members on each side surface of a pair of vertical columns H facing each other, or may be provided in a groove form in which a certain length is recessed and formed on one side surface of the vertical column H.

[0059] The vertical guide frame 25 may include a shaped steel material having a substantially "C" cross section and vertically fixed and installed on one side surface of a pair of vertical columns H facing each other by a plurality of anchor members, and forming guide grooves 25a into which vertical members 23 corresponding to both side edges of the moving body 20 are inserted and arranged to be vertically reciprocally movable.

[0060] At this time, the vertical guide frame 25 is made of a shaped steel material having a certain length such that the lower end is close to the bottom surface of the underpass and the upper end is close to the opened lower end of the air pocket 10.

[0061] The vertical guide frame 25 may include a shaped steel material filled inside the vertical column H during the formation of the vertical column H and exposing the guide groove 25a on one side surface of the vertical column H.

[0062] Thereby, the moving body 20 has vertical members 23 at both side edges inserted and arranged in a guide groove 25a exposed or formed on one side surface of a pair of vertical columns H facing each other, and is connected thereto, so that it can reciprocally guide and move in the vertical direction by an external force along the guide groove 25a.

[0063] Referring to FIGS. 1, 2 and 3, the buoyancy body 30 is at least one buoyancy structure that generates buoyancy to float on the water surface when the underpass is flooded.

[0064] Such a buoyancy body 30 is connected to the lower end of the moving body 20 via a connecting portion 50 so that the upper portion corresponding to the moving body 20 moves up and down along the vertical column H together with the moving body 20, or the upper surface corresponding to the moving body 20 is in contact with and constrained by the lower end of the moving body 20.

[0065] The length of the buoyancy body 30 is preferably shorter than the size of the interval between the vertical columns H so as not to interfere with the vertical guide frame 25 fixedly installed on each one side surface of the adjacent vertical columns H.

[0066] Referring to FIG. 4, the buoyancy body 30 includes a buoyancy box body 31 having an internal space of a certain size in which a plurality of containers 33 filled with air to generate buoyancy are built in, and may include a cover plate 32 that covers and seals the open upper portion of the buoyancy box body 31.

[0067] Here, the buoyancy body 30 has been illustrated and described as being composed of a box structure with a plurality of containers 33 for generating buoyancy built therein, but it is not limited thereto, and may include a substantially hexahedron-shaped sealed hollow buoyancy structure formed of buoyancy such as styrofoam for generating buoyancy or having an internal space of a certain size filled with external air injected through an injection port.

[0068] On the one hand, referring to FIGS. 2, 3 and 4, the connecting portion 50 may include a pair of connecting ribs 51 which are connected by a plurality of fastening members such that the lower horizontal member 22, which is the lower edge of the moving body 20, is fitted and arranged on the upper surface of the buoyancy body 30 and connected integrally with the lower end of the moving body 20.

[0069] The pair of connecting ribs 51 may be rib members integrally provided on the upper surface of the cover plate 32, or may be assembled rib members detachably assembled on the upper surface of the cover plate 32.

[0070] Further, the buoyancy body 30 may include a restraint guide bar 35 which is inserted correspondingly into the guide groove 25a so as to be guided and moved vertically along the vertical columns H facing each other on both side surfaces.

[0071] In such a case, since the restraint guide bars 35 provided on both side surfaces of the buoyancy body 30 are restrained and connected to the guide groove 25a so as to be vertically reciprocally movable, the upper surface of the buoyancy body 30 which moves upward in accordance with the rising water level during the flooding of the underpass can transmit an external force for moving the moving body 20 upward along the guide groove 25a while contacting the lower edge of the moving body 20 without the need for a connecting portion 50 such as the connecting rib 51.

[0072] Referring to FIGS. 5, 6 and 7, the connecting portion 50 may include a structure which allows the buoyancy body 30 to rotate itself while connecting the moving body 20 and the buoyancy body 30 to minimize the resistance of the flowing water hitting the buoyancy body 30.

[0073] Such a connecting portion 50 may include a rotation support shaft 55 having a fixed length with its upper end integrally connected to the lower surface of the moving body 20, and a rotation support hole 52 which is formed through the upper surface of the buoyancy body 30 so that the buoyancy body 30 can rotate itself and the lower end of the rotation support shaft 55 is rotatably connected.

[0074] At this time, the rotation support shaft 55, which is the rotation center of the buoyancy body 30 floating on the water surface, may be provided at a position corresponding to the center of the length and the center of the width of the buoyancy body 30, but is not limited thereto, and may be provided at an eccentric position offset to one side from the center of the length of the buoyancy body 30.

[0075] When the rotation support shaft 55 is provided at the center of the length of the buoyancy body 30, the buoyancy body 30 can freely rotate clockwise or counterclockwise about the rotation support shaft 55 along the flow of the flowing water.

[0076] Also, when the rotation support shaft 55 is provided at an eccentric position of the buoyancy body 30, the buoyancy body 30 can rotate with a directionality toward the biased side among clockwise or counterclockwise about the rotation support shaft 55 along the flow of the flowing water.

[0077] At the lower end of the rotation support shaft 55 exposed to the outside through the rotation support hole 52 formed through the buoyancy body 30, a restraint member such as a nut member 55a or a locking pin can be included to permit the self-rotation of the buoyancy body 30 floating on the water surface about the rotation support shaft 55 while maintaining the connection state with the buoyancy body 30.

[0078] Also, the connecting portion 50 can include a coil-type elastic body 53 such as a torsion spring that is inserted and disposed on the outer surface of the rotation support shaft 55, has an upper end fixed to the lower end of the moving body 20, has a lower end fixed to the upper surface of the buoyancy body 30, and generates an external force to return the rotationally moved buoyancy body 30 to its original state by the elastic restoring force generated during the rotational movement of the buoyancy body 30 by the flowing water.

[0079] Also, the moving body 20 can include a stopper 54 that extends to one end side of the buoyancy body 30 to limit the rotational movement in contact with the end of the buoyancy body 30 so that the rotation of the buoyancy body 30 by the flowing water does not occur by more than 360°.

[0080] The stopper 54 can include a bent plate member that extends a certain length from one end or both ends of the lower horizontal member 22 that constitutes the moving body 20 to the end side of the opposing buoyancy body 30.

[0081] Such a stopper 54 is preferably provided within a radius centered on the rotation support shaft 55 so as to interfere with the buoyancy body 30.

[0082] On the other hand, the rotation support shaft 55 has been illustrated and described as a shaft member whose upper end is integrally connected to the lower horizontal member 22 which is the lower end of the moving body 20, and whose lower end is connected to a rotation support hole 52 formed through the upper surface of the buoyancy body 30. However, it is not limited to this. The rotation support shaft 55 can also be provided as a shaft member of a certain length whose upper end is rotatably connected to a rotation support hole 52 formed through the lower horizontal member 22 which is the lower end of the moving body 20, and whose lower end is integrally connected to the upper surface of the buoyancy body 30.

[0083] Thereby, when the water level in the underpass rises due to rainwater flowing into the underpass, the buoyancy body 30 moves upward in accordance with the rising water level, and the moving body 20 that is integrally connected to the buoyancy body 30 or whose upper and lower ends are in contact with the upper surface of the buoyancy body 30 moves upward along the guide groove 25a of the vertical column H together with the buoyancy body 30 due to the buoyancy of the buoyancy body 30 floating on the water surface.

[0084] At this time, the buoyancy body 30 rotates and moves in one direction around the rotation support shaft 55 according to the flow velocity of the flowing water flowing into the underpass. Since the buoyancy body 30 floating on the water surface is not obstructed by the flow of the flowing water due to the rotational movement of the buoyancy body 30, the frictional resistance generated from the connecting components between both ends of the moving body 20 and the guide groove 25a of the vertical column H can be minimized.

[0085] Also, when the water level in the underpass rises due to the inflow of rainwater to a position near the ceiling surface, the upper end of the moving body 20 that moves upward together with the buoyancy body 30 comes into contact with the lower end of the air pocket 10 arranged and fixedly installed on the ceiling surface of the underpass, and further upward movement is interrupted.

[0086] Referring to FIGS. 8(a) and 8(b), when one buoyancy body 30 is provided at the lower part of the moving body 20 and one connecting part 50 having a rotation support shaft 55 is configured between the moving body 20 and the buoyancy body 30, the buoyancy body 30 is arranged side by side with the moving body 20 directly below the moving body 20 and waits during normal times.

[0087] In such a state, when flooding occurs in the underpass, the buoyancy body 30 rises along the vertical column H together with the moving body in accordance with the gradually rising water level change, and at the same time, it can rotate in one direction around the rotation support shaft 55 according to the flow velocity of the inflowing water.

[0088] When the buoyancy body 30 arranged alone rotates and moves, the impact force with the flowing water transmitted to the buoyancy body 30 can be minimized without obstructing the flow of the flowing water flowing in one direction. Therefore, the frictional resistance generated from the guide grooves 25a where both ends of the moving body 20 are arranged can be minimized. As a result, the upward movement of the moving body 20 caused by the buoyancy of the buoyancy body 30 can be stably performed along the vertical column H without delay in accordance with the water level change. On the other hand, the external force caused by the flowing water transmitted to the moving body 20 and the buoyancy body 30 can be reduced to prevent deformation and damage of the structure.

[0089] Referring to FIGS. 9(a) and 9(b), when a pair of buoyancy bodies 30, 30a are provided at the lower part of the moving body 20 and a pair of connecting parts 50, 50a having a rotation support shaft 55 are configured between the moving body 20 and the pair of buoyancy bodies 30, 30a, the pair of buoyancy bodies 30, 30a are arranged side by side with the moving body 20 directly below the moving body 20 and wait during normal times.

[0090] In such a state, when flooding occurs in the underpass, the pair of buoyancy bodies 30, 30a rise along the vertical column H together with the moving body 20 in accordance with the gradually rising vertical change, and at the same time, they can rotate in one direction around the rotation support shaft 55 according to the flow velocity of the flowing water.

[0091] When the pair of buoyancy bodies 30 and 30a arranged rotate and move, the impact force with the flowing water transmitted to the buoyancy bodies 30 and 30a can be reduced without obstructing the flow of the flowing water flowing in one direction. Therefore, the frictional resistance generated from the guide grooves 25a where both ends of the moving body 20 are arranged is minimized. As a result, the upward movement of the moving body 20 caused by the buoyancy of the buoyancy bodies 30 and 30a can be stably performed along the vertical column H without delay in accordance with the water level change. On the other hand, the external force caused by the flowing water directly or indirectly transmitted to the moving body 20 and the buoyancy bodies 30 and 30a can be reduced to prevent deformation and damage of the structure.

[0092] The operation of the safety fence for an underground roadway using buoyancy according to an embodiment of the present invention will be described.

[0093] In normal times, as shown in Fig. 10(a), the buoyancy body 30 descends due to its own weight and waits at the bottom surface of the underground roadway together with the moving body 20.

[0094] In such a state, when rainwater rapidly flows into the underground roadway at a position lower than the ground due to heavy rain in summer and the inflow volume of the inflowing water becomes larger than the discharge volume drained from the underground roadway to the outside, the water level of the water flowing into and accumulating in the underground roadway can gradually rise and rapidly reach the dangerous water level.

[0095] Also, when the water level of the underground roadway gradually rises, as shown in Fig. 10(b), the buoyancy body 30 waiting at the bottom surface will gradually rise in accordance with the water surface height of the rising water.

[0096] In such a case, the upper surface of the rising buoyancy body 30 is integrally connected through a connecting portion 50 such as a connecting rib 51 or a rotary support shaft 55 with the lower horizontal member 22 which is the lower end of the moving body 20. The vertical members 23 which are the both side edges of the moving body 20 are connected to the guide grooves 25a provided in the vertical column H so as to be vertically movable. Therefore, due to the buoyancy of the buoyancy body 30, the moving body 20 is moved directly above along the guide grooves 25a together with the buoyancy body 30.

[0097] The buoyancy body 30 connected to the moving body 20 through a connecting part 50 such as the rotating support shaft 55 can reduce the frictional resistance generated between the moving body 20 that moves upward while rotating around the rotating support shaft 55 according to the flow velocity of the flowing water into which water flows and the guide groove 25a, and the reduced frictional resistance can stably ensure the upward movement of the moving body 20.

[0098] When the water level of the underground roadway continuously and gradually rises so as to be close to the ceiling surface, as shown in Fig. 10(c), the upper end of the moving body 20 that moves upward together with the buoyancy body 30 contacts the lower end of the air pocket 10, and thus the upward movement of the buoyancy body 30 and the moving body 20 is interrupted.

[0099] In addition, drivers, passengers or pedestrians who have escaped from vehicles such as cars or buses whose operations have been stopped during the flooding of the underground roadway can visually confirm the moving body 20 exposed on the water surface, step on the buoyancy body 30 with their feet, grab the moving body 20 exposed on the water surface, and safely take shelter in a safe area while moving towards the entrance and exit side of the underground roadway. Therefore, personal accidents of drivers caused by the flooding of the underground roadway can be prevented.

[0100] In addition, during the complete flooding of the underground roadway, drivers, passengers or pedestrians can increase their survival rate by breathing the air remaining in the air pocket 10 that is filled and remains inside and is in contact with the upper end of the moving body 20.

[0101] By transmitting the position of the corresponding air pocket 10 among a large number of air pockets installed in the underground roadway to the outside together with the presence or absence of survivors through the operation of the transmitting member 12 provided in the air pocket 10, the exact position of the survivors in the flooded underground roadway can be confirmed from the outside and rescue operations can be carried out.

[0102] Further, by supplying air into the air pocket 10 through the air supply line 16 that is communicatively connected to the supply hole 15 of the corresponding air pocket 10 based on the transmission signal of the transmission member 12, the survival rate of survivors who breathe the air, which is the air supplied into the air pocket 10, can be further increased.

[0103] Although one embodiment of the present invention has been described, the idea of the present invention is not limited by the embodiments presented in this specification. Those skilled in the art who understand the idea of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same idea, and these are also included within the scope of the idea of the present invention. [National Research and Development Project Supporting the Present Invention] [Problem Specific Number] 1315002037 [Problem Number] 00255650 [Ministry / Agency Name] Ministry of Administrative Security [(Problem Management Specialist) Agency Name] Korea Institute of Industrial Technology Evaluation and Management [Research Project Name] National Demand Customized Type Life Safety Research and Development Project (Phase 2) (R&D) [Research Problem Title] Development and Demonstration of an Urban Flooding Smart Safety Monitoring System Utilizing a Newly Utilized Resource Multi - cell Buoy [Contribution Rate] 1 / 1 [Project Implementing Agency Name] Daeheung Unemployment [Research Period] 2023.04.01 ~ 2025.12.31

Explanation of Reference Numerals

[0104] 10 ··· Air pocket 12 ··· Transmission member 15 ··· Supply hole 16 ··· Air supply line 20 ··· Moving body 21 ··· Upper horizontal member 22 ··· Lower horizontal member 25 ··· Vertical guide frame 25a ··· Guide groove 30, 30a ··· Buoyancy body 31 ··· Buoyancy box body 32 ··· Cover plate 35 ··· Restraint guide bar 50, 50a ··· Connection part 51 ··· Connection rib 52 ··· Rotation support hole 53 ··· Elastic body 54 ··· Stopper 55 ··· Rotation support shaft H ··· Vertical column

Claims

1. In a safety fence installed between vertical poles constructed at regular intervals along the road of an underground roadway, At least one air pocket is disposed between a pair of adjacent vertical pillars such that an upper end of the air pocket is in contact with a ceiling surface of the underground passageway and is sealed, and an open lower end of the air pocket is exposed downward; a movable body having two frames connected to guide grooves formed on one side of each of a pair of opposing vertical columns so as to be vertically reciprocatingly movable; At least one buoyant body that generates buoyancy to rise to the water surface when the underground roadway is flooded; The buoyant body moves upward in accordance with the water level of rainwater flowing into the underground roadway when the underground roadway is flooded, and the moving body moves upward along the guide groove together with the upwardly moving buoyant body, and the upper end of the upwardly moving moving body comes into contact with the lower end of an air pocket open to the bottom, and stops.

2. a connecting portion that connects the moving body and the buoyant body, The safety fence for an underground passageway according to claim 1, wherein the connecting portion includes a pair of connecting ribs provided on an upper surface of the buoyant body so that the lower end of the moving body is fitted and connected to the connecting ribs.

3. a connecting portion that connects the moving body and the buoyant body, The safety fence for an underground roadway using buoyancy as described in claim 1, characterized in that the connecting portion includes a rotating support shaft of a certain length, the upper end of which is connected to the lower end of the moving body, and a rotating support hole formed through an upper surface of the buoyant body and to which the lower end of the rotating support shaft is rotatably connected.

4. a connecting portion that connects the moving body and the buoyant body, The safety fence for an underground roadway using buoyancy as described in claim 1, characterized in that the connecting portion includes a rotation support shaft of a certain length whose upper end is connected to the upper surface of the buoyant body, and a rotation support hole formed through the lower end of the moving body and to which the upper end of the rotation support shaft is rotatably connected.

5. 5. A safety fence for underground roadways utilizing buoyancy as described in claim 3 or claim 4, characterized in that it includes an elastic body that is inserted and arranged on the outer surface of the rotating support shaft, has an upper end fixed to the moving body, and has a lower end fixed to the buoyant body.

6. The safety fence for underground roadways utilizing buoyancy as described in claim 3 or claim 4, characterized in that the moving body includes a stopper extending a certain length toward the end side of the buoyant body so as to interfere with the end of the buoyant body and limit the rotational movement of the buoyant body.

7. 2. The safety fence for an underground passageway utilizing buoyancy as described in claim 1, wherein the buoyant body, the upper surface of which is in contact with the moving body, includes restraining guide bars on both sides which are inserted into the guide grooves so as to guide the moving body in an up-down direction along the vertical pillars.

8. 2. The safety fence for an underground passageway using buoyancy according to claim 1, wherein the guide groove is a linear groove recessed to a certain depth on one side of the vertical pillar, or a linear groove formed in a vertical guide frame fixedly installed vertically on one side of the vertical pillar.

9. 2. The safety fence for an underground passageway using buoyancy according to claim 1, further comprising at least one transmitting member inside the air pocket, which transmits position information of the corresponding air pocket to an outside side when operated.

10. At least one air supply line is buried in the upper region of the underground passageway to supply air; 2. The safety fence for an underground passageway utilizing buoyancy according to claim 1, wherein a discharge end of the air supply line is connected to at least one supply hole formed through the air pocket or is located at a lower end opening of the air pocket.

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