KR20030036958A - Lifting apparatus subway safety plate - Google Patents

Abstract

PURPOSE: A lifting apparatus of a safety footstep is provided to prevent accidents by reducing the gap between a platform and a safety door. CONSTITUTION: A safety footstep device(40) is installed under a platform to be moved upward, downward, frontward and backward. A control unit(10) receives a radio signal to be transmitted when a safety door is opened and closed, compares the signal with a previously input value and operates the safety footstep device according to the compared result. A radio transmitter(20) receives and transmits the radio signal when the safety door is opened and closed by embedding in the control unit. An emergency detecting unit(30) is connected with the control unit by a cable, detects an entering subway when the safety footstep device is operated though the subway is not entered by the mis-operation of the control unit and directly transmits the detected signal to the control unit. Thereby, accidents are prevented previously and the advertising effect is obtained by displaying letters in the safety footstep device through an LED(Light Emitting Device).

Description

Subway safety scaffold lifting device {LIFTING APPARATUS SUBWAY SAFETY PLATE}

The present invention relates to a subway safety scaffolding lifting device, in particular, equipped with a safety scaffolding device to automatically move forward and backward when the safety door opening and closing of the subway to reduce the gap between the safety gate and the platform of the subway to prevent safety accidents It relates to a safety scaffold lifting device.

In general, the subway is a public transportation that can move a large number of people in a short time to replace the ground traffic saturated by the increase in traffic volume. These subways are about ten, and one is equipped with four safety gates.

However, when the subway arrives at the platform and the safety door is opened, a certain gap is generated between the safety gate and the platform where the passengers get off, and the passenger's belongings, etc. are in trouble because it cannot be blocked. Safety accidents and the loss of passengers, especially children and the elderly.

The present invention has been made to solve such a conventional problem, the present invention is to provide a subway safety scaffold lifting device that is to prevent the accident of passengers falling out by reducing the gap between the platform and the safety gate of the subway. The main purpose is

Technical problem of the present invention for achieving the object of the present invention, the safety scaffolding device is installed in each of the lifting platform and the bottom of the platform at each point that is opened and closed the safety door of the subway; A control unit installed at each of the platforms and receiving a radio signal transmitted when the safety door is opened and closed, comparing the signal with a previously input value, and then operating the safety scaffolding device according to the value; A wireless transmitter installed to be connected to the opening / closing switch of the safety door and receiving and transmitting a wireless signal when opening and closing the safety door; A wireless receiver built in the control unit and receiving a wireless signal of the wireless transmitter and transmitting the wireless signal to the controller; And an emergency line which is connected to the control unit by wire and is installed at the entrance side of the subway to detect an entering subway when the safety scaffolding device is advanced when the subway is not entered due to a malfunction of the control unit, and directly transmits this signal to the control unit. This is achieved by the sensing part.

1 is a configuration diagram schematically showing the overall configuration of a subway safety foot lift lifting device according to the present invention.

Figure 2 is a perspective view of a subway safety step lifting device according to the present invention.

3 is a front view of FIG. 2;

4 is a sectional view of the main parts of FIG. 3;

5 is a side view of FIG. 2;

Figure 6a, 6b is a cross-sectional view of the operating state of the subway safety step lifting device in accordance with the present invention.

Figure 7 is a bottom view showing the safety device in the subway safety step lifting device according to the present invention.

8 is an enlarged sectional view taken along the line A-A of FIG.

9 is an enlarged sectional view taken along the line B-B in FIG.

10 is an enlarged cross-sectional view taken along the line C-C in FIG.

11 is a view illustrating an operation state of a guide device in a safety device of a subway safety scaffold lifting apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: platform 10: control unit

20,21: radio receiver 30: emergency detection unit

40: safety scaffolding device 50: lifting device

51: vertical guide groove 52,53: 1st and 2nd vertical guide rod

54 plate 55, 71 first and second roller

56, 57: 1st and 2nd vertical plate 58: Horizontal guide groove

59,60: First and second evaluation guide member 61: Fixed bracket

62,76: piston 63: vertical cylinder

70: front and rear movement apparatus 72,73: first and second side members

74,75: upper and lower members 74a: plate

77: horizontal cylinder 78: advertising device

80: safety device 81,83: external, internal member

82: engaging portion 83a: reinforcing plate

90: guide device 91,92: first and second rail

93a, 93b: 1,2 link member 94: fixing pin

95: connection pin 96: rotation pin

97: roller 98: elastic member

100,110: first and second stopper 101: guide ball

200: fastening bolt 210: nut

300: buffer member 311: insertion groove

310: body portion 320: protrusion

400: inclined guide member 410: housing

420: rotating roller

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention and its operation will be described.

1 to 11, the safety scaffold lifting apparatus according to the present invention is largely the control unit 10, the wireless receiver 20, 21, the emergency detection unit 30 and the safety scaffolding device 40 Is done.

The control unit 10 is installed in the platform (1), respectively, when the subway enters the platform (1) and is stopped, the radio signal transmitted when the driver opens the safety door and the radio signal generated when the safety door closes after getting on and off passengers After receiving the, the signal is compared with the input value, and then the safety scaffolding device 40 is operated back and forth according to the value.

The wireless transmitter 20 is installed to be connected to the opening and closing switch (not shown) of the safety door to receive and transmit a radio signal when opening and closing the safety door.

The radio receiver 21 is built in the control unit 10 receives the radio signal of the radio transmitter 20 and transmits it to the control unit 10 to selectively operate the safety scaffolding device 40.

In addition, the radio receiver 20, 21 should not crosstalk at any other frequency, the range is 10M, and the operating voltage is 220V single phase.

On the other hand, the control unit 10 is connected to the emergency detection unit 30 installed in front of the platform (1) in the direction of the subway wired to receive the detected signal to operate the safety scaffolding device (40).

The emergency detection unit 30 is connected to the control unit 10 in a wired manner, is installed in about 200M front of the subway entrance side boarding platform 1, the safety scaffolding device when not entering the subway due to a malfunction in the control unit 10 When the 40 is advanced, the subway is detected and then the signal is directly transmitted to the control unit 10 to operate the safety scaffolding device 40 in the initial state in the control unit 10.

The safety scaffolding device 40 is composed of a lifting device 50, the front and rear movement device 70 and the safety device (80).

The elevating device 50 has an upper end fixed to both sides of the lower part of the landing station 1, and vertical guide grooves 51 are formed to correspond to each other, and the first and second vertical guides having a rectangular plate 54 fixed to the lower end thereof. The rods 52 and 53 and a pair of first rollers 55 inserted into the vertical guide grooves 51 of the first and second vertical guide rods 52 and 53 so as to be movable up and down are rotatably respectively. The first and second vertical plates 56 and 57 and the first and second vertical plates 56 and 57 that are arranged are fixed on both sides of the first and second vertical plates 56 and 57 so as to have the same height and horizontality. The first and second number evaluation guide members 59 and 60 formed to correspond to each other, the fixing bracket 61 fixed to the central region of the bottom of the first and second number evaluation guide members 59 and 60, and the fixing bracket 61. And vertical movement means fixedly installed at both sides between the plate 54. At this time, the vertical movement means is a vertical cylinder (63) provided with a piston (62).

The front and rear movement apparatus 70 is provided with a second roller 71 inserted into the horizontal guide groove 58 of the first and second number evaluation guides 59 and 60 so as to be movable back and forth. The first and second side members 72 and 73 formed, the upper member 74 fixed to the first and second side members 72 and 73, and the first and second side members 72 and 73 The lower member 75 is fixed between the lower portion, the lower member 75 is made of a horizontal moving means provided on the rear center region and the fixing bracket 61 rear. At this time, the horizontal moving means is a horizontal cylinder 77 having a piston (76).

And, between the first and second side members (72, 73) of the front and rear movement device 70 is provided with an advertising device 78, which is represented by LED.

The advertising device 78 is configured to be represented by letters and numbers as a plurality of LEDs, and even if the front and rear mobile device 70 is not operated can be seen by the passengers across the platform (1) to obtain the advertising effect.

The safety device 80 is an outer member 81 fixed to the upper portion of the upper member 74 of the front and rear movement device 70, one end is inserted into the outer member 81 so as to be protruding, and the engaging portion ( 82 is formed between the inner member 83, the inner and outer members 83, 81, the guide device 90 for guiding the appearance of the inner member 83, and one end of the inner member 83 to be movable It consists of a plurality of buffer members 300 and the inclined guide member 400 inclined at both ends of the inner member 83 in order to act as a safety footing.

The guide device 90 may include a reinforcing plate provided at an inner upper portion of the outer member 81 and an upper portion of the upper member 74. 83a) Slidingly inserted into the first and second rails 91 and 92 and the first and second rails 91 and 92 provided in the lengthwise direction, respectively, and rotating while maintaining an "X" shape. The first and second link members 93a and 93b and the first and second link members 93a and 93b which are continuously assembled and held between the sides of the first and second link members 93a and 93b may be provided respectively. It consists of an elastic member 98 for supporting the rotation of 93b).

At this time, one end of the first and second link members 93a and 93b is fixedly installed on the inner and outer members 83 and 81 as fixing pins 94 so as to rotate the first and second link members 93a and 93b. It becomes a center of view, and is connected rotatably by connecting pins 95 to each intersecting central region, and by rotating pins 96 on both sides of connecting portions of end portions of each of the first and second link members 93a and 93b. Each of the first and second link members 93a and 93b is rotatably provided, and each of the first and second link members 93a and 93b is rotatable side to side along the inside of the first and second rails 91 and 92. The first and second link members 93a and 93b are folded around the connection pin 95 and the rotation pin 96.

Then, the first and second stoppers 100 and 110 having the guide holes 101 formed to correspond to both inner and outer members 83 and 81 inner upper sides thereof are installed while maintaining the same height, and the first stopper 100 is disposed on one surface thereof. The fixing nut 210 is fixed to communicate with the guide hole 101, and the fixing nut 210 is inserted through the guide holes 101 of the first and second stoppers 100 and 110 at the same time. ) To prevent the inner member 83 from being separated from the outer member 81.

In addition, the fastening bolt 200 is provided with an adjusting nut 220 to adjust the length of the inner member 83 is haunted from the outer member 81.

The buffer member 300 is formed integrally with one end of the body portion 310 and the body portion 310, the insertion groove 311 is formed to be sequentially inserted into the engaging portion 82 of the inner member (83) , The tip is formed of a protrusion 320 inclined. And, the buffer member 300 is made of a rubber material.

The inclined guide member 400 includes a housing 410 fixed to one side at both ends of the inner member 83, and a plurality of rotating rollers 420 rotatably provided with an outer diameter protruding from the inside of the housing 410. Is done.

On the other hand, the safety scaffolding device 80 is a horizontal movement means of the vertical cylinder 63 and the vertical movement device 70, which is a vertical movement means of the elevating device 50 by a program previously inputted from the control unit 10. The air is supplied to the in-cylinder horizontal cylinder 77, and the flow of air is changed to selectively operate the vertical cylinder 63 and the horizontal cylinder 77, and the piston 62 of the vertical cylinder 63 and the horizontal cylinder 77 76) The stroke length and torque are adjusted.

Referring to the operating state of the present invention configured as described above, as shown in Figs. 1 to 5, the subway enters the station in the traveling direction and stops at the designated position of the platform 1, and then the subway driver operates the safety door opening and closing switch. When the safety door is opened, the safety door is opened and at the same time, the wireless transmitter 20 connected to the safety door open / close switch transmits this signal.

Then, the wireless receiver 21 of the control unit 10 installed in the landing 1 receives the wireless signal generated when the driver's safety door is opened and transmitted to the control unit 10. At this time, the radio receiver 20, 21 should not crosstalk at any other frequency, the range is 10M, the voltage used is 220V single phase.

Accordingly, the control unit 10 receives the radio signal from the radio receiver 21, and then compares the signal with a pre-input value and before and after the safety scaffolding device 40 installed at the bottom of the landing 1 according to the value. It is going to go up and down.

That is, the controller 10 supplies air to the horizontal cylinder 77 which is a horizontal moving means of the front and rear movement apparatus 70. Then, the piston 76 of the horizontal cylinder 77 provided on the rear central region of the lower member 75 and the fixing bracket 61 is extended forward.

Accordingly, the second and the second side members 72 and 73 are provided at both ends and are inserted into the horizontal guide grooves 58 of the first and second number evaluation guides 59 and 60 so as to be movable back and forth. The rollers 71 are moved forward along the horizontal guide grooves 58 of the first and second number evaluation guide members 59 and 60 so that the first and second side members 72 and 73 and the upper and lower members 74 ( 75) and the safety device 80 on top of the upper member 75 are moved forward simultaneously (see FIG. 6A).

At this time, the maximum stroke in which the horizontal cylinder 77 extends forward corresponds to a length in which the rear surface of the outer member 81 of the safety device 80 serving as the safety scaffold matches one end of the landing 1.

At the same time, as shown in FIG. 6B, the control unit 10 supplies air into the vertical cylinder 63, which is a vertical movement means fixedly installed at both sides between the fixing bracket 61 and the plate 54 of the elevating device 50. do. Then, the piston 62 of the vertical cylinder 63 is extended upward.

Accordingly, the upper end is fixed to both sides of the bottom of the landing 1 and the vertical guide groove 51 of the first and second vertical guide rods 52 and 53 having the plate 54 fixed to the lower end so as to be movable up and down. Vertical guide grooves 51 of the first and second vertical guide rods 52 and 53 are provided with first and second vertical plates 56 and 57 rotatably arranged with a pair of first rollers 55 inserted therein, respectively. Will rise along.

At the same time, the first and second vertical plates 56 and 57 are fixed on both sides of the other surface to maintain the same height and horizontality, and the first and second vertical evaluation guides 59 and 60 are formed to correspond to the horizontal guide grooves 58 on one surface thereof. ) And the horizontal guide groove 58 of the first and second number evaluation guides 59 and 60 as the fixing bracket 61 fixed to the bottom center area of the first and second number evaluation guide members 59 and 60 rises. ), The first and second side members 72 and 73, the upper and lower members 74 and 75 and the safety device 80 of the front and rear movement apparatus 70 inserted therein are raised.

Accordingly, the gap between the tip of the shock absorbing member 300 inserted into one end of the inner member 81 of the safety device 80 and the subway safety door are narrowed as much as possible. At this time, the maximum stroke length in which the vertical cylinder 63 extends upward is the upper surface of the outer member 81 and the inner member 83 of the safety device 80, which serves as a safety footing, coincides with the upper surface of the landing 1. Corresponds to the length.

In this state, the passengers will safely step on and off the inner and outer members 83 and 81 of the safety device 80.

On the other hand, after the passengers safely get on and off as described above, when the subway driver operates the safety door switch to close the safety door, the safety door is closed and at the same time the wireless transmitter 20 connected to the safety door opening and closing switch is this signal Will be sent out.

Then, the wireless receiver 21 of the control unit 10 installed in the platform 1 receives the wireless signal generated when the driver's safety door is closed, and transmits it to the control unit 10, which is controlled by the control unit 10. The signal is received and compared with a previously input value, and then the safety scaffolding device 40 installed at the bottom of the platform 1 is lowered and retracted according to the value.

That is, the control unit 10 converts the flow of air supplied to the horizontal cylinder 77 of the front and rear mobile device 70 and the vertical cylinder 63 of the elevating device 50, as shown in FIGS. 6A and 6B. By returning to the original position by operating the forward and backward movement device 70 and the elevating device 50 in the same reverse order, it is prepared for the next operation.

Then, between the first and second side members 72 and 73 of the front and rear movement apparatus 70, an advertisement apparatus 78 configured to be represented by letters and numerals as a plurality of LEDs is provided to operate the front and rear movement apparatus 70. Regardless of whether the passengers across the platform 1 can be seen, the advertisement effect can be obtained.

On the other hand, as shown in FIGS. 7 and 11 in the state in which the elevating device 50 and the front and rear movement device 70 of the safety scaffolding device 40 is sequentially operated as shown in FIG. 5B due to a malfunction of the control unit 10. The subway enters the station and stops at the platform 1 where the safety gate of the subway is opened and closed.

At this time, the safety door side of the subway along the rotating roller 420 protruding rotatably inside the housing 410 of the inclined guide member 400 fixed to one side to both ends of the inner member 83 of the safety device 80 The abutment is guided, and the end of the inner portion (83) of the inner end of the engaging portion 82 of the body portion 310 as the insertion groove 311 is inserted into the protrusion 320 of the buffer member 300 sequentially The shock absorbing member 300 is pressed.

In this process, the shock absorbing member 300 is made of a rubber material, so that the shock is partially buffered, and the shock absorbing member 300 is pushed to the other side, so that a part of the shock absorbing member 300 is separated from the locking portion 82 of the inner member 83 to shock the shock. .

By the pressing force of the side surface of the subway safety door, the inner member 83 inserted into the outer member 81 fixed to the upper member 74 of the front and rear movement apparatus 70 is retractably inserted into the outer member 81. As a whole.

Accordingly, the first and second link members 93a and 93b sequentially assembled to intersect the letter “X” between the inner member 83 and the outer member 81 are sequentially folded inward.

That is, one end is fixedly installed on the inner and outer members 83 and 81 by the fixing pin 94, and is connected to the center area of each intersection is rotatably connected by the connecting pin 95, the rotation of both ends of the connection portion Each roller 97 of the first and second link members 93a and 93b, each of which has a roller 97 rotatably as a pin 96, is provided on the inner and outer members 83, 81 and the upper member 74. As shown in FIG. It is sequentially moved to the right along the first and second rails 91 and 92 provided.

Accordingly, one end of the first and second link members 93a and 93b is fixed to the inner and outer members 83 and 81 by the fixing pin 94, and thus the connection pin 95 and the rotating pin 96 are centered. Will be folded. At this time, the elastic members 98 respectively installed between both sides of the first and second link members 93a and 93b are elastically extended.

At the same time, the inner and outer members 83 and 81 are inserted into the guide holes 101 of the first and second stoppers 100 and 110 installed on both sides, and are fastened to the fixing nut 210 of the first stopper 100. The guide hole 101 of the second stopper 110 of the inner member 83 is moved inward along the outer diameter of the fastening bolt 200 in a fixed state so that the inner member 83 is stably inside the outer member 81. Will move. At this time, when the fastening force of the adjustment nut 220 provided in the fastening nut 200 is adjusted, the inner member 83 adjusts the length from which it emerges from the outer member 81.

Therefore, in the state where the damage to the inner member 83 is prevented, the passengers will safely step on and off the inner and outer members 83 and 81 of the safety device 80.

Starting from the subway in such a state, when the safety door side of the rear of the subway deviated from the inner member 83 of one side of the platform 1, the inner member 83 pressed on one side of the safety door sequentially projects outward.

Accordingly, the first and second link members 93a and 93b are sequentially assembled such that the elastic member 98 returns to its original state and intersects with an "X" between the inner member 83 and the outer member 81 by this restoring force. Are sequentially unfolded outward.

That is, one end is fixedly installed on the inner and outer members 83 and 81 by the fixing pin 94, and is connected to the center area of each intersection is rotatably connected by the connecting pin 95, the rotation of both ends of the connection portion Each roller 97 of the first and second link members 93a and 93b, each of which has a roller 97 rotatably as a pin 96, is provided on the inner and outer members 83, 81 and the upper member 74. As shown in FIG. The left and right rails sequentially move along the first and second rails 91 and 92 provided.

Accordingly, one end of the first and second link members 93a and 93b is fixed to the inner and outer members 83 and 81 by the fixing pin 94, and thus the connection pin 95 and the rotating pin 96 are centered. It is spread out sequentially.

At the same time, the inner and outer members 83 and 81 are inserted into the guide holes 101 of the first and second stoppers 100 and 110 installed on both sides, and are fastened to the fixing nut 210 of the first stopper 100. The guide hole 101 of the second stopper 110 of the inner member 83 is moved outward along the outer diameter of the fastening bolt 200 in a fixed state so that the inner member 83 is stabilized outside the outer member 81. Will move.

In addition, when the safety scaffolding device 40 is advanced due to a malfunction in the control unit 10, the emergency detecting unit 30 is connected to the control unit 10 in a wired manner and installed in the platform 1 at the entrance side of the subway. After detecting the entering subway, the signal is directly transmitted to the control unit 10 to operate the safety scaffolding device 40 to the initial state in the control unit 10. That is, the safety scaffolding device 40 is returned to its original state.

On the other hand, the safety device 80 is the vertical movement means and the horizontal movement means is selectively operated by the value input from the control unit 10, the movement distance of the inner and outer members 83, 81 of the safety device 80 is It is configured not to touch the side of the subway safety door, or in case the inner and outer members 83, 81 of the safety device 80 is in contact with the side of the subway safety door due to the malfunction of the control unit 10. That is, it is designed with safety in mind.

According to the present invention described above, a plurality of safety scaffolding device is installed in the same position as the number of the safety doors of the subway at the position of the platform that the safety gate of the subway is opened and closed, so that the safety scaffolding device is operated simultaneously when opening and closing the subway safety door. By reducing the gap between the platform and the safety doors, passengers, especially children and the elderly, can get on and off safely and prevent accidents.In addition, the safety scaffolding system displays the letters and numbers on the safety scaffolding to get advertising effect. Will be.

While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to the embodiments described above, and is typically defined in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge of the world can make many variations.

Claims (7)

A safety scaffolding device 40 respectively installed on the bottom of the platform 1 at each point at which the safety gate of the subway is opened and closed to move up and down; The control unit is installed in the platform (1) to receive a radio signal transmitted when opening and closing the safety door to compare the signal with a previously input value, and then to operate the safety scaffolding device 40 according to the value ( 10); A wireless transmitter 20 installed to be connected to an open / closed switch of the safety door to receive and transmit a wireless signal when the safety door is opened and closed; A radio receiver 21 built in the control unit 10 and receiving a radio signal of the radio transmitter 20 and transmitting the radio signal to the control unit 10; And It is connected to the control unit 10 in a wired manner, and is installed on the subway entry side and detects the subway to enter when the safety scaffolding device 40 is operated when the subway is not entered due to a malfunction of the control unit 10. Emergency detection unit 30 for directly transmitting a signal to the control unit 10; Subway safety scaffold lifting device, characterized in that consisting of. According to claim 1, wherein the safety scaffolding device 40 First and second vertical guide rods 52 and 53 on which upper ends are fixed to both sides of the platform 1 and vertical guide grooves 51 are formed correspondingly, and rectangular plates 54 are fixed to lower ends thereof. And a pair of first and second vertical plates in which a pair of first rollers 55 rotatably inserted into the vertical guide grooves 51 of the first and second vertical guide rods 52 and 53 are rotatably arranged. The first and second number evaluation guides 59 and 60 fixed to both sides of the first and second vertical plates 56 and 57 and the horizontal guide grooves 58 are formed on one surface thereof. ), And the lifting device 50 consisting of vertical movement means fixed to both sides between the fixing bracket 61 and the plate 54 fixed to the bottom central region of the first and second number evaluation guides 59 and 60. ; First and second side members 72 and 73 having a second roller 71 inserted into the horizontal guide groove 58 of the first and second number evaluation guides 59 and 60 so as to be movable back and forth; An upper member 74 fixed to the upper parts of the first and second side members 72 and 73, a lower member 75 fixed between the lower parts of the first and second side members 72 and 73, and A front and rear movement apparatus 70 comprising a horizontal movement means provided on the rear center region of the lower member 75 and the rear surface of the fixing bracket 61; And The inner member 81 is fixedly installed on the upper member 74 of the front and rear movement apparatus 70, and the inner member is inserted into the outer member 81 so that one end can be protruded, the inner member formed with a locking portion 82 at one end And a guide device 90 installed between the inner and outer members 83 and 81 to guide the appearance of the inner member 83, and sequentially inserted into the inner member 83 so as to be movable. A safety device (80) consisting of a plurality of shock absorbing members (100) and an inclined guide member (200) inclined at both ends of the inner member (83); Subway safety scaffold lifting device, characterized in that consisting of. According to claim 2, Between the first and second side members (72) (73) of the front and rear mobile device (70) Subway safety scaffold lifting device, characterized in that provided with an advertising device represented by the LED (78). The method of claim 2, wherein the guide device 90 The inner upper portion of the outer member 81 and the upper portion of the plate 74a of the upper member 74 and the inner upper portion of the inner member 83 and the upper portion of the reinforcing plate 83a of the lower inner member 83 are provided in the longitudinal direction, respectively. First and second rails 91 and 92, One side is fixed by the fixing pin 94 on the inner and outer members (83, 81), and is connected to the center region to be crossed by a connecting pin (95), rotatable pins (96) on both sides of the connecting portion of each end Rollers 97 are slidably inserted into the first and second rails 91 and 92 so as to be slidable left and right, respectively, so that the first and second link members 93a and 93b are continuously assembled and maintained. Wow, Subway, characterized in that made of an elastic member 98 is installed between both sides of the first and second link members 93a and 93b to support the rotation of the first and second link members 93a and 93b. Safety scaffold lifting device. The first and second stoppers 100 and 110 of claim 2 or 4, wherein the first and second stoppers 100 and 110 having the guide holes 101 are formed on the inner sides of the inner and outer members 83 and 81 so as to correspond to each other. Become, The fixing nut 210 is fixed to one surface of the first stopper 100 so as to communicate with the guide hole 101. The fastening bolts 200 are inserted through the guide holes 101 of the first and second stoppers 100 and 110 to be fastened to the fixing nuts 210. The fastening bolt 200 is provided with a control nut 220, the inner safety member lifting device, characterized in that to adjust the length from which the inner member (83) haunted from the outer member (81). The body member 310 of claim 2, wherein the buffer member 300 includes an insertion groove 311 formed to be sequentially inserted into the locking portion 82 of the inner member 83; Subway safety foot lifting device, characterized in that formed integrally on one end of the body portion 310, the front end is formed of an inclined protrusion 320 is inclined. According to claim 2, The inclined guide member 400 is a housing 410 fixed to one side inclined to both ends of the inner member 83, An outer diameter is protruded in the housing 410, subway safety scaffold lifting apparatus, characterized in that consisting of a plurality of rotating rollers are provided rotatably.