SAFETY APPARATUS FOR TRAIN PLATFORM

Abstract

 The present invention provides a vertically opening/closing screen door, comprising: a pair of main bodies which are disposed upright to be spaced from other on a platform; at least two blocks which are movably provided on respective main bodies, and which overlap each other while moving upward; a wire rope for connecting the block provided on one main body with the block provided on the other main body; and a rope supporting part which is provided in each block and rotationally supports the wire rope so as to connect the wire rope disposed in a plurality of rows with the blocks.

Description

TECHNICAL FIELD

[0001] The present invention relates to safety equipment for a train platform, and more particularly, to a vertically opening/closing safety apparatus disposed on the train platform.

BACKGROUND ART

[0002] Falling accidents in which passengers fall to tracks and collision accidents in which passengers collide with the trains are occurring at the platform for the trains such as subways and trains. In order to prevent these accidents, as a safety apparatus for a train platform, horizontally opening/closing screen doors that are opened and closed by being interlocked with an entrance of the train when the train stops are being installed. In the case of such a horizontally opening/closing screen door, a plurality of doors are installed at positions corresponding to those of the entrances of the train to increase manufacturing and installing costs. In addition, if a position of each of the screen doors does not coincide with a position of each of the entrances of the stopping train, the screen door may not operate. As a technology for solving the problem of the conventional screen door, Korean Patent Registration No. 10-0601112, which is entitled "safety apparatus of electric vehicle platform" has been disclosed.

DISCLOSURE OF THE INVENTION

TECHNICAL PROBLEM

[0003] In the above-described "safety apparatus of the electric vehicle platform" disclosed in Korean Patent Registration No. 10-0601112, when each of moving plates of moving bodies in which ropes are disposed is elevated, central positions of the moving plates are different from each other to generate abrasion due to twisting and eccentric-load phenomena by load that is biased in one direction. Also, if one moving plate of the moving body overlaps the other moving plate while ascending, when the passenger approaches thereto, the passenger's arm or hand may be caught between the ropes connected to the two moving plates. Here, the passenger may get injured or feel pain.

[0004] Also, in the safety apparatus for the train platform using the ropes, a horizontal force due to tension of each of the ropes is applied to a pair of rope elevation units supporting the ropes. Here, there is the need for technology that is capable of effectively controlling the tension of the rope. Also, when the ropes connected to the two moving plates are cut off, the cutoff portion of the rope may inflict an injury on the passenger therearound while the rope is constricted due to the tension. Also, since the ropes connected to the two moving plates lengthily extend, fine vertical vibration in the rope may occur.

[0005] The present invention is provided to solve various problems including the above-described problems. However, this may be merely illustrative, and thus the technical scope of the present invention is not limited thereto.

TECHNICAL SOLUTION

[0006] A safety apparatus for a train platform, the safety apparatus including: a pair of main bodies disposed upright to be spaced apart from each other on the platform; at least two blocks movably mounted on the respective main bodies to overlap each other while ascending; a wire rope connecting the block disposed on one main body to the block disposed on the other main body; and a rope support disposed on each of the blocks to rotatably support the wire rope so that the wire rope is arranged in plural rows and connected to each of the blocks.

[0007] Here, the at least two first rotation pulleys may be disposed at the inside of the block, and the at least two rotation pulleys may be disposed at the outside of the block in which the at least two first rotation pulleys are mounted.

[0008] Here, the first rotation pulley included in one main body may be disposed the block disposed in the one main body, and the first rotation pulley included in the other main body is disposed in parallel to the second rotation pulley included in the other main body.

[0009] Here, the safety apparatus for the train platform may further include a tension adjustment unit for connecting wires wound around the at least two first rotation pulleys to each other and adjusting tension of the wire rope.

[0010] Additionally, technical solution of the present invention will be solved by various units/parts described in the claims of the present invention.

ADVANTAGEOUS EFFECTS

[0011] According to another embodiment of the present invention, when the wire rope that acts as the screen door is disposed between the pair of rope elevation units, the wire rope may be installed in the zigzag form by using the plurality of rotation pulleys as the supports to complete the fixing of both ends of the wire rope once, thereby securing work convenience.

[0012] According to further another embodiment of the present invention, if each of the upper and lower screen doors is constituted by the wire rope disposed in the zigzag form, when a portion of the human body is caught between the upper and lower screen doors, the vertical press applied to the human body may be reduced. Also, when the passenger is bumped into the screen door in a horizontal direction, the screen door may be minimized in horizontal displacement.

[0013] According to further another embodiment of the present invention, if each of the upper and lower screen doors are constituted by different kinds of wire ropes having tension different from each other, when the lower screen door contacts an obstacle while descending, the above-described effects described in the foregoing embodiments as well as the effect in which the control unit of the screen door immediately detects the obstacle may be obtained. Also, when the screen door is constituted by the different kinds of wire ropes, the above-described effects may be provided, and simultaneously, the horizontal tension applied between the rope elevation units may be reduced. Therefore, costs for securing the strength of the rope elevation unit may be reduced.

[0014] The technical scope of the present invention is not limited to the above-described effects.

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 

FIG. 1 is a schematic front view illustrating a structure of a safety apparatus for a train platform according to an embodiment of the present invention, FIG. 2 is a front perspective view of the safety apparatus for the train platform of FIG. 1, FIG. 3 is a side view of a left-side rope elevation unit of FIG. 2, FIG. 4 is a plan view of the left-side rope elevation unit of FIG. 2, FIG. 5 is an operation view of FIG. 2, FIG. 6 is an enlarged view of a main part of FIG. 2, FIG. 7 is a front view of FIG. 6, FIGS. 8 and 9 are views illustrating a state in which the safety apparatus of the present invention is used, and FIG. 10 is a view illustrating a comparative example in which the rope is individually connected.

FIG. 11 is a view illustrating constitutions of the safety apparatus for the train platform according to an embodiment of the present invention.

FIGS. 12 and 13 are views illustrating an example of a method in which a stopper is coupled to a wire rope.

FIG. 14 is a side cross-section view illustrating an example of a spread prevention unit of FIG. 5.

FIG. 15 is a view illustrating an inner structure of a left-side rope elevation unit of a pair of rope elevation units according to another embodiment of the present invention.

FIG. 16 is a plan view illustrating inner constitutions of the left-side rope elevation unit of FIG. 15.

FIG. 17 is a schematic view illustrating an inner structure of the right-side rope elevation unit disposed at a side opposite to the left-side rope elevation unit of FIG. 15.

FIG. 18 is a view illustrating a state where the wire rope is disposed between the upper blocks according to an embodiment of the present invention.

FIG. 19 is a view illustrating a state where outer and inner wire ropes are disposed between the pair of rope elevation unit of FIG. 11 or 15.

MODE FOR CARRYING OUT THE INVENTION

[0016] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. Sizes of elements in the drawings may be exaggerated for convenience of explanation.

[0017] Hereinafter, a safety apparatus for a train platform according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.

[0018] As illustrated in FIG. 1, the safety apparatus for the train platform according to an embodiment of the present invention may include rope elevation units 100, wire ropes 200, and rope sagging prevention units 300.

[0019] Each of the rope elevation units 100 may be disposed at a position selected between an entrance and an exit of the platform where the train enters. The plurality of rope elevation units 100 may be spaced a predetermined distance apart from each other and connected to the wire ropes 200. Each of the rope sagging prevention units may act as a support and be provided in appropriate numbers between the rope elevation units 100 to prevent the wire rope 200 from sagging. The rope sagging prevention unit 300 may be omitted in certain embodiments.

[0020] That is, the rope elevation units 100 are installed on a safety line of a subway or train platform where a passenger waits for the subway or train. When the train approaches a riding position, the rope elevation units 100 lift the wire ropes 200 to allow the passenger who is waiting for the train at the platform to ride in the train. Also, when the train departs after the riding is finished, the rope elevation units 100 allow the wire ropes 200 to descend thereby securing passenger's safety. Thus, the safety apparatus for the train platform according to an embodiment of the present invention may be called a rope platform safety device or a rope platform screen device.

[0021] As illustrated in FIG. 2, each of the rope elevation units 100 may include a main body 110 vertically installed on the platform, at least two blocks 130 and 140 each of which is connected to each of the wire ropes 200 and vertically moving along the main body 110, and a driving member 120 (FIG. 3) moving the blocks 130 and 140. In the current embodiment, two blocks 130 and 140 may be provided in a pair. As illustrated in FIG. 4, the blocks 130 and 140 may be classified into a first block 130 disposed on a rear surface of the main body 110 and a second block 140 disposed on front surface of the main body 110.

[0022] In a modified embodiment, at least three blocks may be installed in one main body 110.

[0023] A first pulley member 150 connected to the first block 130 through a second connection tool 152 and a second pulley member 151 fixed to one side of the first pulley member 150 and connected to the second block 140 through the other second connection tool 152 may be disposed on an upper end of the inside of the above-described main body 110. Here, the second pulley member 151 may have a diameter less than that of the first pulley member 150. That is, the first and second pulley members 150 and 151 may have diameters different from each other. In the current embodiment, the first pulley member 150 connected to the first block 130 that is disposed lower than the second block 140 may have a diameter greater than that of the second pulley member 151.

[0024] When the driving member 120 operates to rotate the first pulley member 150 and second pulley member 151 having a diameter less than that of the first pulley member 150 at the same time, the first and second pulley members 150 and 151 have different rotating distances from each other for the same time. As a result, the first and second blocks 130 and 140 may be differently adjusted in elevation distances and elevation velocity.

[0025] Here, the first and second pulley members 150 and 151 may be adjusted in diameters so that the wire ropes 200 overlap each other when it ascends, and the wire ropes 200 does not overlap each other when it descends according to a movement distance and position of each of the wire ropes 200.

[0026] The first and second pulley members 150 and 151 may be provided in numbers equal to those of the blocks 130 and 140. Also, the first and second pulley members 150 and 151 may have diameters different from each other to adjust an elevation distance of the wire rope 200 according to an operation of the driving member 120. For example, when the number of the blocks is two, two pulleys having diameters different from each other may be provided, and also, when the number of the blocks is three, three pulleys having diameters different from each other may be provided.

[0027] For example, a smoothly rotatable gear or pulley may be applied as the above-described first and second pulley members 150 and 151, and a belt or rope having flexibility so that the belt or rope is wound around outer diameters of the first and second pulley members 150 and 151 may be used as the second connection tool 152.

[0028] Here, the first and second pulley members 150 and 151 may smoothly elevate at least two blocks 130 and 140 by using one driving member 120.

[0029] Although various units such as rotation motors capable of rotating the first pulley member 150 or second pulley member 151 may be used as the driving member 120, a linear motor and a hydraulic cylinder may be used in certain embodiments. Although the driving member 120 is disposed in the upper end of the main body 110, the driving member 120 may be easily changed in position, e. g. , the driving member 120 may be disposed in a lower end of the main body 110.

[0030] A balancing weight 121 may be connected to the first pulley member 150 or the second pulley member 151 by a first connection tool 122. A flexible belt may be used as the first connection tool 122 so that the first connection tool 122 is connected to the first pulley member 150 or second pulley member 151 to rotate. The balancing weight 121 may have a weight corresponding to those of at least two blocks 130 and 140 which are vertically moving by the driving member 120 and that of the wire rope 200 connected to the at least two blocks 130 and 140. When the balancing weight 121 is provided, the driving member 120 may be reduced in load.

[0031] Since the balancing weight 121 descends due to the self-weight thereof in case of a blackout or emergency, the blocks 130 and 140 and wire ropes 200 connected to the balancing weight 121 may ascend to allow the passengers to safely evacuate. Here, the balancing weight 121 may include a plurality of balancing weights each of which has a predetermined weight to allow the worker to assemble or disassemble the plurality of balancing weights so as to adjust the weight of the balancing weight 121.

[0032] An auxiliary roller 123 may be disposed in an upper portion of the main body 110, and thus the first connection tool 122 connected to the driving member 120 smoothly moves and then is connected to the first pulley member 150 or second pulley member 151.

[0033] Thus, when the driving member 120 operates, the blocks 130 and 140 and wire ropes 200 may descend due to their self-weights to block the entrance of the passenger. On the contrary, when the driving member 120 reversely operates, the blocks 130 and 140 and wire ropes 200 may ascend to allow the passenger to enter the train.

[0034] That is, as illustrated in FIG. 5, when the passenger enter the train, the blocks 130 and 140 are maintained in an ascended state, and as illustrated in FIG. 2, when the entrance of the passenger is blocked, the blocks 130 and 140 are maintained at positions different from each other, which are at upper and lower positions to allow the wire ropes 200 to block the entrance of the passenger.

[0035] Meanwhile, rails 111 and 112 for respectively vertically guiding moving paths of the blocks 130 and 140 may be disposed on one side of the inside of the main body 110. First rollers 131 and 141 rotating and moving along the rails 111 and 112 may be respectively disposed in the blocks 130 and 141. For example, the first rollers 131 and 141 may use a liner movement member such as a linear moving (LM) block and an LM guide which are capable of sliding along the rails 111 and 112.

[0036] Here, as illustrated in FIG. 4, centers of the rails 111 and 112, first rollers 131 and 141, and wire rope 200 may be arranged on the same straight line when viewed in plan view. This is because when the centers of the rails 111 and 112 and first rollers 131 and 141 and the center the wire rope 200 are disposed at different positions while the wire rope 200 having predetermined tension is elevated, eccentric load and twisting of the wire rope 200 may occur in one direction to prevent the blocks 130 and 140 and wire rope 200 from being smoothly elevated, thereby causing frequent breakdown and also, resulting in safety accidents.

[0037] As illustrated in FIG. 1, the wire rope 200 may be installed to extend from one side of the main body 110 to the other side of the main body 110, which are disposed at selected positions between the entrance and exit of the platform. That is, an end of the wire rope 200 is connected to each of the blocks 130 and 140 that vertically moves along the main body 100. The wire ropes 200 having a wire arranged in at least two rows are mounted on the first and second blocks 130 and 140, respectively.

[0038] For example, a surface of the wire rope 200 may be covered with an insulating rubber or synthetic resin material. Detailed constitutions of the wire rope 200 will be described later.

[0039] As illustrated in FIG. 5, a spread prevention unit 220 vertically connecting the wires having two or more rows to each other may be further installed on the wire rope 200 to prevent the wires from shaking when the wires are elevated and to efficiently prevent the passenger from entering. For example, the spread prevention unit 220 may be formed of a fabric or synthetic resin material to entirely connect the plurality of wire ropes 200 to each other.

[0040] Meanwhile, as illustrated in FIG. 6, a ratchet wheel 153 may be coupled to one side of the first pulley member 150 or second pulley member 151. Also, a hook may be additionally mounted on one side of the main body 110 so that the hook 160 rotates in a left/right direction with respect to the hinge shaft 161.

[0041] The hook 160 may have one side that is configured to contact and be fitted to the ratchet wheel 153 and the other side on which a support roller 162 is mounted to rotate by contacting the first connection tool 122 connected to the first pulley member 150 or second pulley member 151.

[0042] Thus, usually, while the support roller 162 is in contact with the first connection tool 122 to rotate, the hook 160 and the ratchet wheel 153 are in a state where the hook 160 is spaced a predetermined distance apart from the ratchet wheel 153 so that the hook 160 is not in contact with the ratchet wheel 153. When the first connection tool 122 is cut off, the hook 160 rotates with respect to the hinge shaft 161 due to the self-weight of the support roller 162 and then is fitted to the ratchet wheel 153 to stop the first and second pulley members 150 and 151, thereby preventing the safety accident that is generated when the blocks 130 and 140 and wire rope 200 suddenly descend from occurring in advance.

[0043] Meanwhile, as illustrated in FIG. 7, a plurality of hook grooves 170 may be vertically defined in the main body 110, and a hook protrusion 171 connected to the second connection tool 152 may be disposed on the upper portion of the main body 110 so that the hook protrusion 171 vertically rotates with respect to a rotation shaft 172 disposed at one side of each of the blocks 130 and 140.

[0044] Thus, when the second connection tool 152 is cut off, the hook protrusion 171 rotates in one direction with respect to the rotation shaft 172 and then is fitted to the hook groove 170 to prevent the safety accident that is generated when the blocks 130 and 140 and wire rope 200 suddenly descend from occurring in advance.

[0045] Meanwhile, as illustrated in FIG. 2, the above-described wire rope 200 may be provided in plural rows and be coupled to the blocks 130 and 140 disposed in one main body 110 and blocks 130 and 140 disposed in the other main body 110 by rope supports.

[0046] Each of the rope supports may include a plurality of rotation pulleys 132, 133, 142, and 143 mounted on each of the blocks 130 and 140 to rotatably support the wire ropes 200. Each of the wire ropes 200 may be alternately circularly wound around of the plurality of rotation pulleys 132 and 133 or 142 and 143 in a horizontal direction. That is, one wire rope 200 may be connected to each of the blocks 130 and 140 so that the wire rope 200 has a closed loop.

[0047] Here, the plurality of rotation pulleys 132, 133, 142, and 143 may include a first rotation pulley 132 and 142 and a second rotation pulley 133 and 143.

[0048] At least two first rotation pulleys 132 and 142 may be installed to rotatably support the rows of the outer wires of the wire ropes 200 having the plurality of rows. In the current embodiment, although each of the wire ropes 200 connected to each of the blocks 130 and the blocks 140 is arranged in six rows, the present invention is not limited thereto and may be variously modified.

[0049] For example, like as the current embodiment, in the wire rope 200 having six rows, rows of the outer wires of the wire rope 200 means a first row and a sixth row, and rows of the inner wires of the wire rope 200 means a second row to fifth row. Also, if an area of one row of the wire rope 200 needs to be designated, it is called "wire" for convenience.

[0050] At least two second rotation pulleys 133 and 143 may be installed to rotatably support the wires, which are arranged inside, of the wire rope 200 arranged in plural rows.

[0051] As the rope elevation unit 100 illustrated at a left side of FIG. 2, the first rotation pulleys 132 and 142 may be respectively disposed inside the blocks 130 and 140, and the second rotation pulleys 133 and 143 may be respectively disposed at the outside of the blocks 130 and 140. In the current embodiment, two first rotation pulleys 132 and 142 and four second rotation pulleys 133 and 143 are installed to one of each of the blocks 130 and 140. Here, the inside of the blocks 130 and 140 means a portion that is adjacent to the rails 111 and 112, and the outside of the blocks 130 and 140 means a portion that is adjacent to the blocks 130 and 140 facing each other.

[0052] On the other hand, as the rope elevation unit 100 illustrated at a right side of FIG. 2, the first rotation pulleys 132 and 142 and the second rotation pulleys 133 and 143 may be disposed in parallel to each other at the inside or outside of the blocks 130 and 140.

[0053] Here, the blocks 130 and 140 illustrated at the left side of FIG. 2 may respectively further include tension adjustment units 135 and 145 for respectively connecting the wire wound around the pair of first pulleys 132 to each other and connecting the wire wound around the pair of first pulleys 142 to each other. The tension adjustment units 135 and 145 may adjust tension of the wire rope 200.

[0054] The wire rope 200 connected to each of the blocks 130 and 140 may be easily adjusted in tension by one tension adjustment unit 135 and one tension adjustment unit 145. For example, each of the tension adjustment units 135 and 145 may include a tension spring and may be provided in various versions. In order to adjust the tension, the first rotation pulleys 132 and 142 may be provided as a ratchet wheel.

[0055] Like this, since the wire rope 200 connected by the rope support is rotatably supported by the plurality of rotation pulleys 132, 133, 142, and 143, the wire rope 200 has a degree of freedom (DOF) to circulate the rotation pulleys 132, 133, 142, and 143.

[0056] Thus, as illustrated in FIG. 8, if the two blocks 130 and 140 overlap each other to ascend, when a human body A, such as a hand, an arm is fitted between the wire ropes 200, the wire rope 200 lengthily extends while the plurality of rotation pulleys 132, 133, 142, and 143 are rotating.

[0057] Therefore, as illustrated in FIG. 10, when the human body A is fitted, only one wire extends in the conventional wire rope connection structure in which each wire W is individually connected. However, in the current embodiment, all of the plurality of wires may rotate to extend, thereby relatively reducing the passenger's pain and risk of injury.

[0058] Also, as illustrated in FIG. 9, if the blocks 130 and 140 spread to block the entrance of the passenger, tensions T1 and T2 respectively applied to the wires of the wire rope 200 are the same even though the passenger hits the wire rope 200. Thus, as illustrated in FIG. 10, the wire rope 200 may have the same displacement as that of the conventional wire rope to which each wire W is individually connected. Therefore, the current embodiment may achieve its original object for safely blocking the passenger at the platform.

[0059] FIG. 11 is a view illustrating constitutions of the safety apparatus for the train platform according to an embodiment of the present invention.

[0060] In the safety apparatus for the train platform, the rope elevation units 100 illustrated in FIG. 1 are respectively disposed at the left and right sides, and the wire rope 200 is connected therebetween. The left-side rope elevation unit is represented with reference number 101, and the right-side rope elevation unit is represented with reference number 102. The wire rope 200 may be classified into several segments 201 to 206. Each of the segments 201 to 206 may be classified by the rotation pulleys 132, 133, 142, and 143. Stoppers 231 and 232 may be disposed at each of the segments 201 to 206. In FIG. 11, the stoppers 231 and 232 may be disposed at the outside of the main body 110 and may be spaced a predetermined distance apart from a case portion of the main body 110. Each of the stoppers 231 and 232 may be tightly coupled to the wire rope 200. In another embodiment, the stoppers 231 and 232 may be disposed in the main body 110. Also, the spread prevention unit 221 is coupled to the wire rope 200. Constitutions and functions of the wire rope 200 and spread prevention unit 221 will be described with reference to FIGS. 12 to 14.

[0061] FIGS. 12 and 13 are views illustrating an example of a method of coupling the stopper 231 to the wire rope 200. The stopper 231 may be constituted by a front piece 231a and a rear piece 231b. The wire rope 200 is disposed between a pair of rope elevation units 100, and then as illustrated in FIG. 12, the front and rear pieces 231a and 231b of the stopper 231 are coupled to each other in a state where the wire rope 200 is disposed therebetween. The front piece 231a is attached and coupled to the rear piece 231b. Here, each of the front and rear pieces 231a and 231b may be formed of an elastic material. Alternatively, each of the front and rear pieces 231a and 231b may have a hole and be coupled to each other by tightening a bolt and nut through the hole. Here, each of the front and rear pieces 231a and 231b may be formed of a hard material. In case of the embodiment in which each of the stoppers 231 and 232 has a disk shape, each of the stoppers 231 and 232 may have a diameter greater than that of a hole of the main body 110, which is defined to allow the wire rope 200 to pass therethrough. The stopper 232 may have the same structure and function as that of the stopper 231.

[0062] Referring to FIG. 11, when a spot BP of the segment 201 is cut off, the wire rope 200 (including the tension adjustment unit 145) may constrict with respect to a central point O of the wire rope 200. Thus, each of the segments 201 to 206 may move right and/or left. Here, since the stoppers 231 and 232 are tightly coupled to the wire rope 200 and each of which has a size greater than the hole of the main body 110 for passing the wire rope 200 therethrough, the stoppers 231 and 232 may be caught by the main body 110. Thus, each of the segments 201 to 206 may be limited in movement distance. If the stoppers 231 and 232 do not exist, each of cut both ends of the segment 201 may shake forward and backward while moving far away from each other in each of left and right directions to hurt a person therearound. Thus, the stoppers 231 and 232 may exist to reduce the above-described risk.

[0063] FIG. 14 is a side cross-section view illustrating an example of a spread prevention unit 220 of FIG. 5.

[0064] In the spread prevention units 220 and 221 illustrated in FIG. 14, the uppermost hole H1 has a diameter ϕ1 and others H2 to H6 have diameters ϕ2 (ϕ2>ϕ1). Here, the hole H1 has a diameter less than or equal to that of the wire rope 200 passing through the hole H1. Thus, the spread prevention unit 221 and the wire rope 200 may be tightly coupled to each other to move together with each other. On the contrary, each of the holes H2 to H6 has a diameter greater than that of the wire rope 200. Thus, the wire rope 200 may freely move within each of the holes H2 to H6 in left and right directions. Although the uppermost hole H1 has the smallest diameter in FIG. 14, a predetermined hole of the plurality of holes H1 to H6 may have a diameter less than diameters of other holes in a modified embodiment. Thus, as illustrated in FIG. 8, even though the human body is caught by a certain spot BA, the wire rope 200 may vertically extend sufficiently. Thus, even though the spread prevention unit 221 exists, when the human body is caught between the wire rope 200, the pain may be minimized.

[0065] The spread prevention unit 221 illustrated in FIG. 14 may be mounted on the wire rope 200 after the wire rope 200 is completely installed. Here, the spread prevention unit 221 may be constituted by a front piece and a rear piece, and thus the front and rear pieces may be coupled to each other by a adhesion material or a coupling member such as a bolt/a nut. Here, the spread prevention unit 221 may be formed of an elastic material.

[0066] FIG. 15 is a view illustrating an inner structure of a left-side rope elevation unit 100L of a pair of rope elevation units according to another embodiment of the present invention.

[0067] A left-side rope elevation unit 100L includes upper and lower sprockets 14 and 15 connected to each other by a chain 20. A driving member 120 (FIG. 16) such as a rotation motor may be connected to the lower sprocket 15, and the upper sprocket 14 may rotate together with the lower sprocket 15 according to an operation of the driving member 120.

[0068] Two rails 111 and 112 for respectively guiding left-side upper and lower blocks 140L and 130L are disposed in a left-side rope elevation unit 100L. Each of the left-side upper and lower blocks 140L and 130L may be connected to a rotation shaft of the upper sprocket 14 by a second connection tool 152.

[0069] A balancing weight 121 having a weight corresponding to those of the left-side upper and lower blocks 140L and 130L may be connected to a shaft of the upper sprocket 14.

[0070] Two outer rotation pulleys 43 for mounting an outer wire rope and seven inner rotation pulleys 42 for mounting an inner wire rope are disposed in the left-side upper block 140L. Similarly, two outer rotation pulleys 33 for mounting an outer wire rope and seven inner rotation pulleys 32 for mounting an inner wire rope are disposed in the left-side lower block 130L. The number of the rotation pulley may be changed according to an embodiment.

[0071] FIG. 16 is a plan view illustrating inner constitutions of the left-side rope elevation unit 100L of FIG. 15.

[0072] A first pulley member 150, a second pulley member 151 having a diameter less than that of the first pulley member 150 and the upper sprocket 14 may rotate about the same shaft. Alternatively, even though not the same shaft, the first and second pulley members 150 and 151 may rotate about the other shaft that is interlocked with the shaft of the upper sprocket 14. The first pulley member 150 is connected to the left-side lower block 130L by a second connection tool 152, and the second pulley member 151 is connected t the left-side upper block 140L by the other second connection tool 152. The balancing weight 121 and the upper sprocket 14 may rotate about the same shaft by a first connection tool 122. Alternatively, even though not the same shaft, the balancing weight 121 may rotate about the other shaft that is interlocked with the shaft of the upper sprocket 14. The upper sprocket 14 is connected to the lower sprocket 15 by the chain 20, and the lower sprocket 15 rotates by the driving member 120. The driving member 120 may be controlled by a control unit 59.

[0073] FIG. 17 is a schematic view illustrating an inner structure of the right-side rope elevation unit 100R disposed at a side opposite to the left-side rope elevation unit 100L of FIG. 15.

[0074] A right-side rope elevation unit 100R has an inner structure corresponding to that of the left-side rope elevation unit 100L. However, since the left-side upper and lower blocks 140L and 130L are connected to each other by the wire rope, the right-side upper block 140R may have a modified structure from that of the left-side upper block 140L. That is, the right-side upper block 140R includes two outer rotation pulleys 43 for mounting the outer wire rope and six inner rotation pulleys 42 for mounting the inner wire rope. The right-side lower block 130R may have the same constitutions as that of the right-side upper block 140R.

[0075] FIG. 18 is a view illustrating a state where the wire rope is disposed between the upper blocks 140L and 140R according to an embodiment of the present invention. In FIG. 18, the wire rope may be constituted by different kinds of wire ropes, which are an inner wire rope 201H and an outer wire rope 200H. The inner wire rope 201H is alternately disposed on thirteen inner rotation pulleys 42. Both ends of the inner wire rope 201H are connected to each other by a second coupling tool 62. The outer wire rope 200H is alternately disposed on four outer rotation pulleys 43. Both ends of the outer wire rope 200H are connected to each other by a first coupling tool 61. Each of the first and second coupling tools 61 and 62 may include a tension adjustment unit such as a spring.

[0076] The outer wire rope 200H may be disposed at the outside than the inner wire rope 201H and have elasticity greater than that of the inner wire rope 201H. For example, although the outer wire rope 200H may be formed of the same material as that of the inner wire rope 201H, the outer wire rope 200H may use a wire thicker than that of the inner sire rope 201H. Alternatively, the outer and inner wire ropes 200H and 201H may have the same thickness, however the outer wire rope 200H may be formed of a material having elasticity greater than that of the inner wire rope 201H. That is, the outer and inner wire ropes 200H and 201H may be wire ropes different from each other.

[0077] An embodiment of the present invention relates to a method of installing the wire rope of the safety apparatus for the train platform, and in this method, the outer wire rope 200H is installed after the inner wire rope 201H is installed.

[0078] FIG. 19 is a view illustrating a state where outer and inner wire ropes are disposed between the pair of rope elevation unit of FIG. 11 or 15.

[0079] An upper screen door is provided by the outer and inner wire ropes 200H and 201H. That is, ' the upper screen door' is a concept including the outer and inner wire ropes 200H and 201H. A lower screen door is provided by the outer and inner wire ropes 200L and 201L.

[0080] When the human body is caught by the wire rope while the safety apparatus for the train platform illustrated in FIG. 19 is opening and closing, following effects may be obtained.

[0081] First, a portion of the human body may be caught by a gap B1 between the two inner wire ropes 201H and 201L. Here, since each of the inner wire ropes 201H and 201L lengthily and freely extends by the rotation of each of the inner rotation pulleys 32 and 42, a vertical force applied to the human body may be reduced to decrease the pain of the human body. When a portion of the human body is caught between the inner wire rope and the outer wire rope, the inner wire rope may sufficiently extend to reduce the vertical force applied to the human body.

[0082] Second, a portion of the human body such as a head may be caught by the lowermost wire B2 of the lower screen door while the above-described upper and lower screen doors are descending. Here, the control unit 59 may immediately detect a change of a load applied to the driving member 120 to stop the screen door from descending. Here, if the tension applied to the outer wire rope 200L of the lower screen door is not big enough, the screen door descends further by a predetermined distance after a portion of the human body contacts a lower side of the outer wire rope 200L, and then the control unit 59 may detect the change of the load applied to the driving member 120. Thus, as the outer wire rope 200L increases in tension, the control unit 59 may be improved in detection responsibility with respect to the load change.

[0083] In FIG. 19, for example, if both of the tension of the outer and inner wire ropes 200L and 201L are adjusted to have big values, horizontal tension applied between the rope elevation units 100L and 100R increases too big, and thus the rope elevation units 100L and 100R need to be made stronger. On the contrary, for example, if both of the tension of the outer and inner wire ropes 200L and 201L are adjusted to have small values, the above-described effect in which the control unit 59 is improved in load change detection responsibility may not be obtained. Thus, as illustrated in FIGS. 18 and 19, the different kinds of wire ropes having different tensions from each other may be used to prevent the above-described limitations from occurring.

[0084] In FIG. 19, if the safety apparatus from which the outer wire ropes 200H and 200L are removed is installed, the safety apparatus may have a structure similar to that of FIG. 3.

[0085] FIGS. 2 to 10 are views illustrating the safety apparatus for the train platform according to an embodiment of the present invention, and FIGS. 15 to 18 are illustrating a safety apparatus for a train platform according to another embodiment of the present invention. The present invention has been particularly shown and described with two examples of various embodiments, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. For example, the constitutions of the rope elevation unit 100 illustrated in FIGS. 2 to 10 may be exchanged with those of the rope elevation units 100L and 100R illustrated in FIGS. 15 to 19.

[0086] Hereinafter, embodiments of the present invention will be described with reference to reference numerals of accompanying drawings.

[0087] A platform safety apparatus according to an embodiment of the present invention includes an upper screen door 11, a lower screen door 12, and the pair of elevation units 100R and 100R or 100 for vertically elevating the upper and lower screen doors 11 and 12. The pair of elevation units 100L and 100R or 100 includes the upper blocks 140L and 140R or 140 in which the plurality of upper rotation pulleys 42 or 142 that are vertically arranged to allow the upper screen door 11 to be mounted thereon are disposed and the lower blocks 130L and 130R or 130 in which the plurality of lower rotation pulleys 32 or 132 that are vertically arranged to allow the lower screen door 12 to be mounted thereon are disposed. Also, the upper screen door 11 includes the upper wire ropes 201H or 200 alternately circularly wound around the plurality of upper rotation pulleys 42 or 142 disposed in the pair of elevation units 100L and 100R or 100 in a horizontal direction to allow both ends thereof to be coupled to each other. Also, the lower screen door 12 includes the lower wire ropes 201L or 200 alternately circularly wound around the plurality of lower rotation pulleys 32 or 132 disposed in the pair of elevation units 100L and 100R or 100 in a horizontal direction to allow both ends thereof to be coupled to each other.

[0088] A platform safety apparatus according to another embodiment of the present invention includes an upper screen door 11, a lower screen door 12, and a pair of elevation units 100R and 100R or 100 for vertically elevating the upper and lower screen doors 11 and 12. The upper screen door 11 includes the upper outer wire rope 200H and the upper inner wire rope 201H, and the lower screen door 12 includes the lower outer wire rope 200L and the lower inner wire rope 201L. Each of the pair of elevation units 100L and 100R or 100 includes the upper blocks 140L and 140R including the plurality of upper outer rotation pulleys 43 for mounting the upper outer wire rope 200H and the plurality of upper inner rotation pulleys 42 for mounting the upper inner wire rope 201H. Also, each of the pair of elevation units 100L and 100R or 100 includes the lower blocks 130L and 130R including the plurality of lower outer rotation pulleys 33 for mounting the lower outer wire rope 200L and the plurality of lower inner rotation pulleys 32 for mounting the lower inner wire rope 201L.

[0089] The upper inner wire rope 201H may be alternately circularly wound around the plurality of upper inner rotation pulleys 42 in a horizontal direction, and the upper outer wire rope 200H may be supported by the plurality of upper outer rotation pulleys 43 at the outside of the upper inner wire rope 201H.

[0090] The lower inner wire rope 201L may be alternately circularly wound around the plurality of lower inner rotation pulleys 32 in a horizontal direction, and the lower outer wire rope 200L may be supported by the plurality of lower outer rotation pulleys 33 at the outside of the lower inner wire rope 201L.

[0091] According to a modified embodiment of the present invention, one of the upper and lower screen doors may be constituted by several ropes that are separately coupled thereto like as the rope illustrated in FIG. 10, and the other one may be constituted by one rope or two ropes wound around the plurality or rotation pulleys like as the wire rope illustrated in FIG. 14 or 19. In this structure, the effect that is obtained by FIG. 14 or 19 may be obtained by the modified embodiment.

[0092] Accordingly, a person having ordinary skill in the art will understand from the above that various modifications and other equivalent embodiments are also possible. Hence, the real protective scope of the present invention shall be determined by the technical scope of the accompanying claims.

<Descriptions of the reference numerals in the drawings>

14, 15:	Sprocket	20:	Chain
32, 42:	Inner rotation pulley	33, 43:	Outer rotation pulley
59:	Control unit
61:	First coupling tool	62:	Second coupling tool
100:	Rope elevation unit	110:	Main body
100L:	Left-side rope elevation	100R:	Right-side rope elevation unitunit
111, 112:	Rail	120:	Driving member
121:	Balancing weight	122:	First connection tool
123:	Auxiliary block	130:	First block
130L:	Left-side lower block	130R:	Right-side lower block
131, 141:	First roller	140:	Second block
140L:	Left-side upper block	140R:	Right-side upper block
132, 142:	First rotation pulley	133, 143:	Second rotation pulley
150:	First pulley member
151:	Second pulley member	152:	Second connection tool
153:	Ratchet wheel	160:	Hook
161:	Hinge shaft	162:	Support roller
170:	Hook groove	171:	Hook protrusion
172:	Rotation shaft	200, 201 to 206:	Wire rope
220, 221 to 224:	Spread prevention unit	231, 232:	Stopper
200H, 200L:	Outer wire rope	201H, 201L:	Inner wire rope

Claims

1. A safety apparatus for a train platform, the safety apparatus comprising:

a pair of main bodies disposed upright to be spaced apart from each other on the platform;

at least two blocks movably mounted on the respective main bodies to overlap each other while ascending;

a wire rope connecting the block disposed on one main body to the block disposed on the other main body; and

a rope support disposed on each of the blocks to rotatably support the wire rope so that the wire rope is arranged in plural rows and connected to each of the blocks.

2. The safety apparatus according to claim 1, wherein the rope support comprises a plurality of rotation pulleys mounted on the blocks, and the wire rope is alternately circularly wound around the plurality of rotation pulleys in a horizontal direction.

3. The safety apparatus according to claim 2, wherein the plurality of rotation pulleys comprise:

at least two first rotation pulleys for rotatably supporting the rows of the outer wires of the wire rope having the plurality of rows; and

at least two second rotation pulleys for rotatably supporting the rows of the inner wires of the wire rope having the plurality of lines.

4. The safety apparatus according to claim 1, further comprising:

a first pulley member disposed in an upper end of the inside of the main body and connected to the block through a coupling tool;

a second pulley member fixed to one side of the first pulley member and connected to the block through a coupling tool, the second pulley member having a diameter less or greater than that of the first pulley member; and

a driving member disposed at one side of the inside of the main body to rotate the first and second pulley members.

5. The safety apparatus according to claim 4, wherein a rail is vertically disposed on one side of the inside of the main body, and a roller rotatably moving along the rail is disposed in the block,
wherein the rail and the roller are disposed in a straight line.

6. The safety apparatus according to claim 1, further comprising a spread prevention unit for vertically connecting the wires having the plural rows of the wire rope to each other.

7. A method of installing a safety apparatus for a train platform, the method comprising:

uprightly installing a pair of rope elevation units (100), wherein each of the rope elevation units (100) comprises first and second blocks (130, 140) comprising a plurality of rotation pulleys (132, 133, 142, 143);

circularly alternately winding a wire rope (200) around the rotation pulleys (132, 133, 142, 143) in a horizontal direction between the pair of first blocks (130) and between the pair of second blocks (140); and

installing stoppers (231, 232) on each of segments (201 to 206) of the wire rope (200),

wherein the first and second blocks (130, 140) overlapping each other while ascending by the rope elevation unit (100), and

a plurality of holes through which the wire rope 200 passes is defined in each of the rope elevation units 100, and

each of the stoppers (231, 232) has a shape in which the stopper does not pass through the hole.

8. The method according to claim 7, further comprising installing a spread prevention unit (220) having a plurality of through holes, through which the wire rope (200) passes, on the wire rope (200),
wherein at least one hole (H1) of the plurality of through holes has a diameter less that or equal to that of the wire rope (200) so that a portion of the wire rope (200) is fixed to the spread prevention unit (220), and
at least the other hole (H2) of the plurality of through holes has a diameter greater than that of the wire rope (200).

9. A safety apparatus for a platform comprising:

upper and lower screen doors; and

a pair of elevation units for vertically elevating the upper and lower screen doors,

wherein each of the pair of elevation units comprises:

an upper block comprising a plurality of upper rotation pulleys vertically arranged to mount the upper screen door thereon; and

a lower block comprising a plurality of lower rotation pulleys vertically arranged to mount the lower screen door thereon, and

wherein the upper screen door comprises an upper wire rope circularly alternately wound around the plurality of upper rotation pulleys, which are provided in the pair of elevation units, in a horizontal direction to allow both ends thereof to be coupled each other, and

the lower screen door comprises a lower wire rope circularly alternately wound around the plurality of lower rotation pulleys, which are provided in the pair of elevation units, in the horizontal direction to allow both ends thereof to be coupled to each other.

10. A safety apparatus for a platform comprising:

first and second screen doors; and

a pair of elevation units for vertically elevating the first and second screen doors,

wherein each of the pair of elevation units comprises:

a first block comprising a plurality of first rotation pulleys vertically arranged to mount the first screen door thereon; and

a second block for mounting the second screen door thereon,

wherein the first screen door comprises a first wire rope circularly alternately wound around the plurality of first rotation pulleys, which are provided in the pair of elevation units, in a horizontal direction to allow both ends thereof to be coupled to each other, and

the second screen door comprises several wires that horizontally extend.

Drawing