CN213892489U - Scalable emergent evacuation ladder suitable for high-speed maglev train - Google Patents

Abstract

The utility model discloses a scalable emergent sparse ladder suitable for high-speed maglev train belongs to the sparse technical field of high-speed maglev traffic, and it holds the storehouse through the setting of door below at high-speed maglev train to set up the scalable emergent sparse ladder of constituteing by two articulated subassemblies and a plurality of footboards in holding the storehouse, utilize in the articulated subassembly a plurality of articulations to set up and cooperate the control with the correspondence of first bracing piece, second bracing piece, can realize the quick folding and the expansion of scalable emergent sparse ladder. The utility model discloses a scalable emergent evacuation ladder, its simple structure sets up and easy and simple to handle, can form continuous emergent evacuation ladder between high-speed maglev train door and evacuation platform, provides the guarantee for the emergent evacuation under the train emergency, has avoided emergent evacuation in-process personnel to follow dropping on the train, has guaranteed passenger's personal safety and property safety, has promoted the application of high-speed maglev track traffic technique, has better application prospect and spreading value.

Description

Scalable emergent evacuation ladder suitable for high-speed maglev train

Technical Field

The utility model belongs to the technical field of high-speed maglev traffic is sparse, concretely relates to scalable emergent sparse ladder suitable for high-speed maglev train.

Background

With the continuous development of rail transit technology and the increasing improvement of living standard of people, the requirements on the travel quality and the travel efficiency are also continuously improved. At present, although the traditional wheel-rail track traffic is greatly improved in the operation speed compared with the prior art, the operation speed is limited by the wheel-rail adhesion limit and is difficult to be greatly improved. Meanwhile, with the continuous accumulation and development of magnetic levitation track traffic technology, the research heat of high-speed magnetic levitation track traffic begins to rise year by year, and the ever-conducting high-speed magnetic levitation initially realizes commercial application or reaches the commercial application degree.

The existing normal-conducting high-speed magnetic suspension vehicle generally adopts an arrangement form of rail-holding operation, adopts a long-stator linear motor sectional power supply technology to carry out traction drive, and adopts the design of arranging redundancy and the like of important subsystems and components, so that the high-speed magnetic suspension vehicle is safer and more reliable than a wheel-rail train. However, the high-speed maglev system has many electrification devices and a complex operation environment, and an evacuation and escape method for taking a train into consideration when a train breaks down suddenly in an auxiliary parking area or a tunnel is required.

At present, aiming at evacuation in a high-speed maglev traffic viaduct section, a common method is to set an auxiliary parking area with evacuation and escape conditions for passengers, and correspondingly set an evacuation channel in the auxiliary parking area, so that a train can slide to the auxiliary parking area to park when the train breaks down on the viaduct, and then escape through the evacuation channel; for evacuation and escape in a tunnel section, an evacuation platform is provided to allow passengers to descend to the evacuation platform through a vehicle door. However, the speed grade of high-speed maglev is generally 400-600 km/h, the aerodynamic effect and the difference between the track beam and the conventional wheel track are very different, so that the distance between the evacuation platform and the train door is longer than that of the conventional track traffic. For example, in the tunnel region, the height difference between the floor surface of a 600km/h grade magnetic levitation vehicle and the evacuation platform is 900mm, and the distance between the evacuation platform and the side part of the vehicle is 690mm at the minimum. Such big discrepancy in elevation and level for there is certain potential safety hazard in the evacuation of following evacuation platform on the train, often is in under conditions such as nervous atmosphere or light dim when in addition fleeing for one's life evacuation, makes the personnel evacuation in-process very easily take place to drop, endangers passenger safety.

SUMMERY OF THE UTILITY MODEL

To the above defect of prior art or improve in the demand one or more, the utility model provides a scalable emergent evacuation ladder suitable for high-speed maglev train can be at high-speed maglev train door department and evacuation platform/evacuation passageway's the emergent evacuation ladder of automatic formation between the ground, and the passenger flees fast on the auxiliary vehicle, avoids sparse personnel of fleing the in-process to drop, guarantees passenger's personal safety, promotes the security and the reliability of high-speed maglev traffic.

In order to achieve the above purpose, the utility model provides a retractable emergency evacuation ladder suitable for a high-speed maglev train, which is arranged in a containing bin below a door of the high-speed maglev train and comprises a pair of hinge assemblies which are oppositely arranged;

the hinge assembly comprises a first support rod, a second support rod and three hinge pairs which are sequentially hinged, namely a first hinge pair, a second hinge pair and a third hinge pair which sequentially extend outwards from one side of the vehicle door after being unfolded;

each hinge pair comprises a pair of hinge rods hinged with each other, and the end parts of two adjacent hinge pairs are hinged with each other; meanwhile, pedals are respectively hinged between the two first hinge pairs and between the two second hinge pairs, and two ends of each pedal are respectively hinged at the positions where the two hinge rods in the corresponding hinge pair are hinged with each other;

one end of the first supporting rod is rotatably connected to the inner side wall surface of the accommodating bin, and the other end of the first supporting rod is hinged to the position where the two hinge rods in the first hinge pair are hinged to each other, so that the emergency evacuation ladder in a folded state is retracted into the accommodating bin or rotated out of the accommodating bin;

the second supporting rod comprises a rotating part and a telescopic part which are coaxially arranged; one end of the rotating part is rotatably connected to the inner wall surface of the accommodating bin, the other end of the rotating part is movably matched with one end of the telescopic part, the other end of the telescopic part is hinged to the position where the two hinge rods in the second hinge pair are hinged to each other, and therefore the hinge pairs can be driven by the second support rod to achieve switching between a folded state and an unfolded state.

As a further improvement of the present invention, the two hinge rods in the third hinge pair are hinged at the ends; and is

Supporting legs are arranged at the end parts of the two hinge rods in the third hinge pair, which are hinged with each other, or a supporting pedal is arranged between the two third hinge pairs; the supporting feet or the supporting pedals are used for abutting against the ground after the emergency evacuation ladder is unfolded so as to support the emergency evacuation ladder.

As a further improvement of the present invention, two hinge rods of the two first hinge pairs are respectively hinged at the middle part, and one side of each of the two first hinge pairs, which is far away from the corresponding second hinge pair, is respectively hinged with at least one additional hinge pair;

the two hinge rods in the additional hinge pair are hinged with each other, and the pedal is arranged between the two aligned additional hinge pairs.

As a further improvement of the utility model, the opening part of the containing bin is provided with an openable apron board.

As a further improvement of the utility model, the apron board is arranged in a split type with two apron boards or a translation type with a single apron board.

As a further improvement of the present invention, at least one additional hinge pair is further provided between the first hinge pair and the second hinge pair and/or between the second hinge pair and the third hinge pair; the two hinge rods in the additional hinge pair are hinged in the middle, a pedal is arranged at the hinged position in the middle, and two ends of the additional hinge pair are hinged with the corresponding hinge pair respectively.

As a further improvement of the utility model, it corresponds at least one the additional hinge is to being provided with flexible rotation support rod.

As a further improvement of the present invention, the second support rod is a rotatable hydraulic support rod.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, through the utility model above technical scheme who conceives compares with prior art, the beneficial effect who has includes:

(1) the utility model discloses a scalable emergency evacuation ladder suitable for high-speed maglev train, it is through setting up the storehouse in the door below of high-speed maglev train, and set up the scalable emergency evacuation ladder that contains two relative settings hinge assembly and a plurality of footboard in the storehouse, utilize a plurality of articulated pairs and the corresponding setting of first bracing piece, second bracing piece in the hinge assembly, make the emergency evacuation ladder can be held in the storehouse with the form of folding when the train normally operates, and can roll over and expand from the storehouse when the train needs emergency evacuation, form continuous evacuation ladder between the door ground of train and the ground of evacuation platform/evacuation passageway, in order to compensate height difference and evacuation level difference between high-speed maglev train door ground and evacuation platform/evacuation passageway ground, avoid the passenger to drop from the door when emergent, guarantee the emergent security of passenger, the emergency evacuation on the high-speed maglev train is guaranteed, and the operation reliability of the high-speed maglev train is improved.

(2) The utility model discloses a scalable emergent evacuation ladder suitable for high-speed maglev train, it is through setting up the emergent evacuation ladder that can extend outward at the door department of high-speed maglev train, make the evacuation platform/evacuation passageway of high-speed maglev traffic keep away from the operation region of train as far as possible, reserved more safe spaces for the operation of high-speed maglev train; meanwhile, the building cross-sectional area of matched facilities such as an evacuation platform and the like can be reduced to a certain extent, the investment cost of construction of related civil facilities is saved, and the construction cost of high-speed magnetic suspension traffic is reduced.

(3) The utility model discloses a scalable emergent evacuation ladder suitable for high-speed maglev train, it sets up the supporting legs or supports the footboard through the tip that the third hinge is right for emergent evacuation ladder can reliably support subaerial at evacuation platform evacuation passageway after emergent expansion, guarantees emergent evacuation ladder job stabilization nature and security.

(4) The utility model discloses a scalable emergency evacuation ladder suitable for high-speed maglev train, it is through the additional setting of articulated pair and footboard in the articulated subassembly, and the corresponding setting of corresponding flexible rotation bracing piece is deuterogamy for the length after emergent evacuation ladder expandes can further be adjusted according to actual need, and then satisfies the use under the different application environment, has promoted the commonality and the flexibility of emergent evacuation ladder setting; meanwhile, the emergency evacuation ladder can be accommodated in the accommodating bin when not in operation, so that the design of the outer contour of the train can be fully maintained, the streamline of the outer contour of the train is not influenced, and the influence on the sealing performance of the train is small.

(5) The utility model discloses a scalable emergent evacuation ladder suitable for high-speed maglev train, a structure is simple, the setting is simple and convenient with the operation, can be fast between high-speed maglev train door department ground and evacuation platform ground, accurately form continuous emergent evacuation ladder, emergency evacuation under the high-speed maglev train emergency provides the guarantee, the personnel of having avoided emergent evacuation in-process from dropping on the train, the personal safety and the property safety of passenger have been guaranteed, the application of high-speed maglev track traffic technique has further been promoted, better application prospect and spreading value have.

Drawings

Fig. 1 is a schematic axial-side three-dimensional structure of an emergency evacuation ladder according to an embodiment of the present invention;

fig. 2 is a front view of the retractable emergency evacuation ladder of the embodiment of the present invention when it is retracted and accommodated;

fig. 3 is a sectional view of the retractable emergency evacuation ladder in the direction of a-a when the retractable emergency evacuation ladder is retracted and accommodated in the embodiment of the present invention;

fig. 4 is a front view of the retractable emergency evacuation ladder of the embodiment of the present invention when opened;

fig. 5 is a sectional view of the retractable emergency evacuation ladder in the embodiment of the present invention from the B-B direction when the retractable emergency evacuation ladder is opened;

fig. 6 is an enlarged view of a partial structure of the retractable emergency evacuation ladder when being retracted and accommodated in the embodiment of the present invention;

fig. 7 is an enlarged view of a partial structure of the retractable emergency evacuation ladder according to the embodiment of the present invention when opened;

in all the figures, the same reference numerals denote the same features, in particular:

1. a folding bar assembly; 2. a pedal; 3. supporting legs; 4. an accommodating bin; 5. a skirt board; 6. a vehicle door; 7. a vehicle body;

101. a first support bar; 102. a second support bar; 103. a first hinge pair; 104. a second hinge pair; 105. a third hinge pair; 106. a fourth hinge pair;

1021. a rotating part; 1022. a telescopic part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

please refer to fig. 1-7, the retractable emergency evacuation ladder suitable for high-speed maglev train in the preferred embodiment of the present invention is disposed in the storage compartment 4 below the door 6 of the high-speed maglev train body 7, and the corresponding storage compartment 4 is provided with the skirt board 5 capable of automatically opening and closing, so that the evacuation ladder is folded and accommodated in the storage compartment 4 when not in operation, and is unfolded and extended from the storage compartment 4 when in operation, then the train door 6 and the evacuation platform are connected, and the rapid evacuation of personnel on the train is completed.

In particular, the evacuation ladder in the preferred embodiment comprises a pair of hinge assemblies, which are arranged opposite each other and between which a plurality of steps 2 are arranged, so that the plurality of steps 2 may form a continuous ladder structure after deployment of the evacuation ladder, as shown in fig. 1.

More specifically, each hinge assembly includes a first support bar 101, a second support bar 102, and a plurality of hinge pairs sequentially hinged. In order to ensure the stability of the plurality of hinge pairs against forces and support, the hinge pairs in the preferred embodiment are provided in four, namely a first hinge pair 103, a second hinge pair 104, a third hinge pair 105 and a fourth hinge pair 106. Obviously, the length and number of hinge pairs may also be set preferably according to the set length of the evacuation ladder, for example, three hinge pairs (in this case, the fourth hinge pair 106 is preferably eliminated, and the first hinge pair 103 is set in the form of the fourth hinge pair 106), or more than four hinge pairs may be provided, and additional hinge pairs may be provided between the first hinge pair 102 and the second hinge pair 104, between the second hinge pair 104 and the third hinge pair 105, and/or between the first hinge pair and the fourth hinge pair 106; accordingly, it is further preferable to provide corresponding telescopic rotary support bars for the extra hinge pairs, the arrangement of which is referred to the arrangement of the second support bar 102.

Further, the number of hinge pairs in the preferred embodiment is four, as shown in fig. 6 and 7. Two hinge rods of the first hinge pair 103 and the second hinge pair 104 are respectively hinged with the middle part, and two ends of the two hinge rods are respectively hinged with the end parts of the hinge rods of the adjacent hinge pair, namely, one end of the first hinge pair 103 is hinged with one end of the fourth hinge pair 106, the other end is hinged with one end of the second hinge pair 104, and the other end of the second hinge pair 104 is hinged with the end part of the third hinge pair 105. Correspondingly, the ends of the two hinge rods of the fourth hinge pair 106 and the third hinge pair 105 facing away from the adjacent hinge pair are hinged to each other, forming a continuous hinge structure as shown in fig. 7.

Furthermore, three pedals 2 are arranged corresponding to the four hinged pairs, each pedal 2 is horizontally arranged, and two ends of each pedal are respectively hinged with the two hinged components. Specifically, both ends of the pedal 2 are respectively hinged at the junction position of two hinge rods in the corresponding hinge pair, as shown in fig. 7. Meanwhile, the third hinge joint is used for supporting the two hinge rod hinge joints in the 105 to be abutted to the evacuation platform, so the pedal 2 is not arranged at the two hinge rod hinge joints, but the supporting legs 3 are arranged, so that the supporting legs 3 can be abutted to the ground of the evacuation platform/evacuation channel after the evacuation ladder is unfolded, and stable support is provided for the maintenance of the whole evacuation ladder.

It is clear, however, that the preferred embodiment also allows direct abutment of the hinged ends of the third pair 105 against the ground of the evacuation platform, but such an arrangement would reduce the area of contact of the third pair 105 with the ground, increase the force of the third pair 105 against the ground, and present the possibility of damaging the ground of the evacuation platform. In addition, as shown in other hinge pairs, the pedals 2 can be horizontally arranged at the hinge positions of the two hinge rods of the third hinge pair 105, namely, the pedals 2 at the end parts are abutted against the ground of the evacuation platform after the evacuation ladder is unfolded, and the stable support of the whole evacuation ladder is further ensured.

Further, a first supporting rod 101 and a second supporting rod 102 are provided corresponding to each hinge pair as shown in fig. 6 and 7, wherein the first supporting rod 101 is a rotatable supporting rod, one end of which is hinged on the inner side wall surface of the accommodating chamber 4, and the other end of which is hinged at the hinged position of the two hinge rods in the first hinge pair 103. Meanwhile, the first supporting rod 101 is located at the middle lower part of the inner wall of the opening of the accommodating bin 4 at the position where the end part is hinged with the accommodating bin 4, so that when the first supporting rod 101 rotates towards the outside of the accommodating bin 4, the folding evacuation ladder accommodated in the accommodating bin 4 can be taken out by the first supporting rod 101. Of course, when the first support bar 102 rotates from the outside of the accommodating compartment 4 to the inside of the accommodating compartment 4, the folded evacuation ladder can be retracted into the accommodating compartment 4.

Further, the second support rod 102 in the preferred embodiment is a telescopic rotation support rod, which includes a rotation part 1021 and a telescopic part 1022 coaxially disposed. One end of the rotating part 1021 is rotatably connected with the inner side wall surface of the accommodating bin 4 to move upwards, and the telescopic part 1022 is coaxially matched with the periphery of the other end of the rotating part 1021 and can be axially and reciprocally telescopic relative to the side end part, so that the folding evacuation ladder can be unfolded or the folding evacuation ladder can be folded in a retracting manner. In the preferred embodiment, the actuation of the telescopic part 1022 is hydraulic, with one end matching the turning part 1021 and the other end hinged at the hinge position of the two hinge rods in the second hinge pair 104. Through the flexible of pars contractilis 1022, can realize that the second articulates 104 along the axial of second bracing piece 102 release or pull back, and the two hinge bar hinge position of first articulated pair 103 at this moment are fixed by first bracing piece 101 for the hinge assembly can be pulled open under pars contractilis 1022's effect and extend or be pulled back folding, utilize the change of two hinge bar contained angles in each articulated pair, can correspond the horizontal extension distance and the vertical extension distance that increase evacuation ladder, realize the intercommunication of door department carriage ground and evacuation platform/evacuation passageway ground.

In addition, the skirt panel 5 in the preferred embodiment is preferably provided in a horizontally-translated open-close manner, and may further preferably be provided in a manner that two skirt panels are split or a single skirt panel is translated.

In summary, the retractable emergency evacuation ladder in the preferred embodiment is shown in fig. 2 and 3 in the non-operating state, in which the first support bar 101 is rotated back into the storage compartment 4, the second support bar 102 is in the retracted state, and the skirt panels 5 close the opening of the storage compartment 4.

When the high-speed maglev train is stopped stably at one side of the evacuation platform, firstly opening the apron board 5 below the train door 6 to open the accommodating bin 4, then controlling the first support rod 101 to rotate outwards for a certain angle and lock in place, and taking out the evacuation ladder in a folded state from the accommodating bin 4, wherein in the process, the second support rod 102 rotates along with the rotation, and the telescopic part 1022 on the second support rod 102 extends along with the extension; thereafter, the extension part 1022 on the second support rod 102 is controlled to extend axially to unfold the evacuation ladder in a folded state, so that the pedals on the fourth hinge pair 106 move to the position below the door position, and the support legs 3 on the third hinge pair 105 are supported on the ground of the evacuation platform, thereby completing the unfolding of the emergency evacuation ladder and facilitating the passengers on the door position to get on or off the vehicle.

After the emergency evacuation ladder finishes evacuation work, the second support rods 102 are controlled to retract firstly, the hinge pairs are retracted to the folded state, the first support rods 101 are controlled to rotate, the folded evacuation ladder is retracted to the accommodating bin 4, and finally the apron boards 5 are closed, so that the emergency evacuation ladder is reset and accommodated.

The utility model provides a scalable emergent evacuation ladder suitable for high-speed maglev train, a structure is simple, the setting is simple and convenient with the operation, can be fast between high-speed maglev train door department ground and evacuation platform ground, accurately form continuous emergent evacuation ladder, emergency evacuation under the high-speed maglev train emergency provides the guarantee, the personnel of having avoided emergent evacuation in-process from dropping on the train, the personal safety and the property safety of passenger have been guaranteed, the application of high-speed maglev track traffic technique has further been promoted, better application prospect and spreading value have.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A telescopic emergency evacuation ladder suitable for a high-speed maglev train is characterized in that the emergency evacuation ladder is arranged in a containing bin below a door of the high-speed maglev train and comprises a pair of hinge assemblies which are oppositely arranged;

the hinge assembly comprises a first support rod, a second support rod and three hinge pairs which are sequentially hinged, namely a first hinge pair, a second hinge pair and a third hinge pair which sequentially extend outwards from one side of the vehicle door after being unfolded;

each hinge pair comprises a pair of hinge rods hinged with each other, and the end parts of two adjacent hinge pairs are hinged with each other; meanwhile, pedals are respectively hinged between the two first hinge pairs and between the two second hinge pairs, and two ends of each pedal are respectively hinged at the positions where the two hinge rods in the corresponding hinge pair are hinged with each other;

one end of the first supporting rod is rotatably connected to the inner side wall surface of the accommodating bin, and the other end of the first supporting rod is hinged to the position where the two hinge rods in the first hinge pair are hinged to each other, so that the emergency evacuation ladder in a folded state is retracted into the accommodating bin or rotated out of the accommodating bin;

the second supporting rod comprises a rotating part and a telescopic part which are coaxially arranged; one end of the rotating part is rotatably connected to the inner wall surface of the accommodating bin, the other end of the rotating part is movably matched with one end of the telescopic part, the other end of the telescopic part is hinged to the position where the two hinge rods in the second hinge pair are hinged to each other, and therefore the hinge pairs can be driven by the second support rod to achieve switching between a folded state and an unfolded state.

2. A telescopic emergency evacuation ladder suitable for use in a high speed magnetic-levitation train as claimed in claim 1, wherein the two hinge rods of the third hinge pair are hinged at the ends; and is

Supporting legs are arranged at the end parts of the two hinge rods in the third hinge pair, which are hinged with each other, or a supporting pedal is arranged between the two third hinge pairs; the supporting feet or the supporting pedals are used for abutting against the ground after the emergency evacuation ladder is unfolded so as to support the emergency evacuation ladder.

3. The retractable emergency evacuation ladder suitable for high-speed maglev trains according to claim 1, wherein the two hinge rods of the two first hinge pairs are respectively hinged at the middle part, and the sides of the two first hinge pairs departing from the corresponding second hinge pairs are respectively hinged with at least one additional hinge pair;

the two hinge rods in the additional hinge pair are hinged with each other, and the pedal is arranged between the two aligned additional hinge pairs.

4. A telescopic emergency evacuation ladder suitable for a high-speed maglev train according to any one of claims 1 to 3, wherein an openable skirt board is provided at the opening of the accommodating bin.

5. The retractable emergency evacuation ladder suitable for high-speed magnetic-levitation trains as claimed in claim 4, wherein said skirt boards are arranged in two skirt board halves or in a single skirt board translation.

6. A retractable emergency evacuation ladder suitable for use in a high speed magnetic-levitation train as claimed in claim 1, wherein at least one additional hinge pair is further provided between the first and second hinge pairs and/or between the second and third hinge pairs; the two hinge rods in the additional hinge pair are hinged in the middle, a pedal is arranged at the hinged position in the middle, and two ends of the additional hinge pair are hinged with the corresponding hinge pair respectively.

7. A retractable emergency evacuation ladder suitable for use in a high speed magnetic-levitation train as claimed in claim 6, wherein a retractable rotary support bar is provided corresponding to at least one of said additional hinge pairs.

8. The retractable emergency evacuation ladder suitable for high-speed maglev trains of claim 1, wherein the second support bar is a rotatable hydraulic support bar.

Images