Method for opening and closing an evacuation ramp of an evacuation door

Abstract

The present application relates to a kind of evacuation door evacuation ramp opening and closing method, including the step when opening and the step when recycling.Opening time: S1.open the folded evacuation ramp, and make the evacuation ramp stretch into flat plate;S2.open main support foot, and make main support foot and ground close to vertical, and main, vice support foot between it is herringbone;S3.stretch evacuation ramp, and the front end of evacuation ramp gradually approaches ground, and make main support foot support on ground;S4.if main support foot meets obstacle when stretching evacuation ramp, main support foot and vice support foot support ground simultaneously.Recycling time: S5.hand pull vice support foot and rotate in the opposite direction of ramp stretching;S6.when vice support foot coincides with main support foot, vice support foot drives main support foot to rotate in the same direction;S7.temporarily fix pedal and support foot;S8.make its support foot adhere to the back of the foremost pedal;S9.ramp recycling is completed.The present application makes support foot rotate when meeting obstacle, and two support feet are herringbone and support ground, guarantee the stability, safety of evacuation ramp.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of operation method of rail transit escape device, more specifically, it relates to a kind of opening and closing method of evacuation door ramp. BACKGROUND

[0002] Rail transit evacuation door is a lifesaving equipment, when subway, urban rail transit etc. Fault occurs, and when disaster occurs, passenger escapes through evacuation door.Evacuation door is generally installed in the front end of driver's room, but there is still about 1 meter height between evacuation door and ground, when passenger escapes, it is easy to cause injury to directly jump from the car, subway bed, track bed is paved with rail, sleeper and stone etc. Facilities, passenger is not careful to easily cause personal injury, and passenger directly jumps down, it will affect the escape speed.In order to increase the safety of escape, evacuation ramp will be set between evacuation door and ground, evacuation ramp is composed of folding treadle, which is folded and installed in driver's room, when escape is needed, evacuation ramp is stretched, and evacuation ramp will be laid between evacuation door and track bed, passenger quickly gets off along evacuation ramp.

[0003] Evacuation ramp needs to be passed through by passenger without interruption, so it needs to be stable to avoid shaking and other causes passenger damage.But the length of evacuation ramp is fixed, and the road conditions of each track are different, there are sleepers, spikes, re-railers, switches and other obstacles in some sections, the height difference between vehicle floor and track bed bottom will be different at these places.For most sections, evacuation ramp can contact the bottom of track bed after being opened, and evacuation ramp is relatively stable;In the above-mentioned sections with obstacles, evacuation ramp cannot be ensured to be stable on the ground.In order to solve this problem, some manufacturers increase a telescopic rod at the front end of evacuation ramp, when evacuation ramp cannot contact the ground, the added telescopic rod will be opened, so that evacuation ramp is fixed to the ground.But track bed is full of various facilities, such as sleeper, spike, re-railer, switch etc., once the telescopic rod encounters these obstacles, it still cannot firmly support the ground, and evacuation ramp still has safety problems.

[0004] CA107521506A discloses a pedal mechanism for urban rail transit vehicle emergency escape evacuation, which adopts a technical solution of setting an extension rod at the front end of the evacuation ramp. When the ramp is unfolded, the first extension rod extends to the left and right sides, supporting the ramp on the top surface of the rail. When encountering a curve or the distance between the ramp and one side of the rail is far, the second extension rod can be manually pulled out to extend the extension rod, so that it can fall on the top surface of the rail to support the curved surface. The invention is suitable for the case where the evacuation ramp is located in the middle of the front end of the driver's room. When the evacuation ramp is unfolded under a straight section, the front end is relatively average distance from the left and right rails, and under a curved section, the evacuation ramp does not exceed the width of the track on one side. The length of the extension rod required to support the rail top surface can be hidden in the space below the pedal. When the evacuation ramp needs to be arranged on the left side of the front end of the driver's room, under a straight section, the evacuation ramp is already left relative to the left and right rails. Under a limit right turn section, when the distance between the evacuation ramp and the right rail is large, the length of the second extension rod cannot meet the requirements. At the same time, the second extension rod of this scheme needs to be manually pulled out, increasing the operation time of the evacuation ramp, and reducing the evacuation efficiency in emergency situations. Moreover, this scheme is only suitable for rail transit vehicles with a driver. If applied to unmanned vehicles, untrained passengers cannot perform the manual operation, the evacuation ramp cannot be stably supported, and the evacuation function cannot be realized. SUMMARY

[0005] The present application aims to solve the problem of the existing technology that the evacuation ramp cannot guarantee safety and stability during use. A method for opening and closing the evacuation ramp of an evacuation door is provided, and the specific technical solutions are as follows:

[0006] A method for opening and closing the evacuation ramp of an evacuation door, the evacuation ramp includes a plurality of folded pedals, the bottom of the frontmost pedal is provided with a support foot, the support foot includes a coaxial rotating main support foot and a secondary support foot, the opening and closing method of the evacuation ramp includes steps of opening and steps of recovering, and the specific steps are as follows:

[0007] When the evacuation ramp is opened:

[0008] S1. Open the folded evacuation ramp to stretch it into a flat plate;

[0009] The evacuation ramp is composed of multiple pedals, and the multiple pedals are sequentially connected to form a flat plate type ramp for escape;

[0010] S2. Open the main support foot to make it perpendicular to the ground, and drive the main support foot to make the secondary support foot form a certain angle with the main support foot, so that the main and secondary support feet form a herringbone shape;

[0011] S3. Stretch the evacuation ramp, and gradually approach the ground at the front end of the evacuation ramp to make the main support foot support on the ground;

[0012] S4. When the main supporting leg encounters an obstacle while the evacuation ramp is being stretched, the main supporting leg and the auxiliary supporting leg rotate in the opposite direction of the stretching of the evacuation ramp, so that the main supporting leg and the auxiliary supporting leg of the inverted V-shaped structure support the ground at the same time;

[0013] When the evacuation ramp is being retracted:

[0014] S5. The auxiliary supporting leg is manually turned in the opposite direction of the stretching of the ramp;

[0015] S6. When the auxiliary supporting leg coincides with the main supporting leg, the auxiliary supporting leg drives the main supporting leg to rotate in the same direction;

[0016] S7. When the supporting leg approaches the back of the step, the step and the supporting leg are temporarily fixed;

[0017] S8. The ramp is retracted, and the plurality of steps are folded in sequence, so that the frontmost step and the second frontmost step press the supporting leg, and the supporting leg is attached to the back of the frontmost step;

[0018] S9. The temporary fixing of the step and the supporting leg is released, and the retraction of the ramp is completed.

[0019] Further, an air spring is arranged on the main supporting leg, and the other end of the air spring is arranged on the step. In S2, the main supporting leg is driven by the air spring, so that the main supporting leg is automatically opened.

[0020] Further, a torsion spring for driving the main supporting leg and the auxiliary supporting leg to form an angle is arranged between the main supporting leg and the auxiliary supporting leg. In S2, the main supporting leg drives the torsion spring, and the torsion spring drives the auxiliary supporting leg to form an inverted V-shaped structure with the main supporting leg.

[0021] Further, a pull rod for controlling the maximum relative angle between the main supporting leg and the auxiliary supporting leg is arranged between the main supporting leg and the auxiliary supporting leg. The pull rod is provided with a sliding groove, one end of the pull rod is hinged to the auxiliary supporting leg, and the pull rod is connected to the main supporting leg through the sliding groove. In S4, when an obstacle is encountered, the main supporting leg is turned in the opposite direction of the stretching of the ramp, and the auxiliary supporting leg is turned in the same direction by the pull rod, so that the two supporting legs of the inverted V-shaped structure support the ground.

[0022] Further, a baffle is arranged on the auxiliary supporting leg. The baffle extends on one side of the main supporting leg. In S6, the auxiliary supporting leg drives the main supporting leg to rotate in the same direction through the baffle.

[0023] Further, a pull ring is arranged on the step, and a hook is arranged on the auxiliary supporting leg. The opening direction of the hook is towards the hinging direction of the step and the auxiliary supporting leg. In S7, the pull ring is hooked on the hook for temporary fixing.

[0024] Further, in S9, the frontmost step and the second frontmost step press the supporting leg, and the supporting leg is attached to the step, so that the pull ring and the hook are automatically released. In the present application, the front and back are the directions of the stretching of the evacuation ramp.

[0025] Further, the ramp is connected by four steps in turn.

[0026] Further, the ramp is unfolded, the front end is not more than 120mm from the rail surface, and the angle with the ground is 24°.

[0027] Further, the ramp is arranged on the left side of the driver's room, and the ramp is deflected 5° to the right side of the driver's room after being unfolded.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] The main supporting leg and the auxiliary supporting leg are arranged, and the supporting leg is perpendicular to the ground after being unfolded, the ground is contacted by the supporting leg, the problem of uncertain height of the evacuation door and the track bed is solved, the evacuation ramp can contact the ground. In the process of stretching the evacuation ramp, if there is no obstacle, the main supporting leg plays a supporting role; when encountering an obstacle, the obstacle will make the main supporting leg rotate backward, drive the auxiliary supporting leg to rotate together, and the main supporting leg and the auxiliary supporting leg will form a herringbone supporting leg, which supports the ground together, effectively ensuring the stability of the ramp. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the placement position of the evacuation ramp;

[0031] Figure 2 It is a schematic diagram of the ramp;

[0032] Figure 3 It is a schematic diagram of the supporting leg unfolding;

[0033] Figure 4 It is a schematic diagram of the supporting leg working without obstacles;

[0034] Figure 5 It is a schematic diagram of the supporting leg distribution;

[0035] Figure 6 It is a schematic diagram of the supporting leg working with obstacles;

[0036] Figure 7 It is a schematic diagram of the baffle;

[0037] Figure 8 It is a schematic diagram of the supporting leg unhooking;

[0038] Figure 9 It is a schematic diagram of the temporary fixing of the supporting leg.

[0039] In the figure: 1 - evacuation ramp; 2 - rail; 3 - cleat; 4 - rotating A-frame; 5 - rail surface; 6 - bed surface; 7 - step 1 ; 8 - step 2; 9 - step 3; 10 - step 4; 11 - main support leg; 12 - secondary support leg; 13 - air spring; 14 - torsion spring; 15 - pull rod; 16 - slide; 17 - baffle; 18 - pull ring; 19 - hook. DETAILED DESCRIPTION

[0040] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise explicitly specified and limited, "on" or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0041] Example 1

[0042] This invention provides a method for opening and closing evacuation doors and evacuation ramps, wherein the evacuation ramp is shaped as follows: Figures 1-5 As shown. Figure 1As shown, the evacuation ramp 1 is offset to the left of the driver's cab and rotated approximately 5°. This is to ensure that the evacuation ramp, when deployed on a straight road, does not interfere with the road spikes, thus preventing the ramp from not deploying properly. Figure 2 As shown, after the evacuation ramp is deployed, its foremost point is no more than 120mm from the rail surface 5, forming a 24° angle with the ground. The evacuation ramp includes multiple treads, which, when extended, connect sequentially to form the evacuation ramp, as shown below. Figure 3 As shown, the evacuation ramp consists of four sections: section 1 (7), section 2 (8), section 3 (9), and section 4 (10). These four sections are connected sequentially to form a rectangular platform for escape. The evacuation ramp is also equipped with handrails, guardrails, and other facilities. Figure 4 As shown, the rotating A-frame support 4 mainly consists of a main support leg 11 and a secondary support leg 12 that rotate coaxially. The rotating A-frame support 4 is as follows... Figure 3 As shown, it is installed in the middle of pedal four 10, and is normally folded between pedal four 10 and pedal three 9. One main support leg and one cooperating secondary support leg form a set. The bottom surface of the pedal has at least two sets to accommodate situations where the left rail on the extreme right turn track will enter the area of ​​pedal four by approximately 200mm, while ensuring the left and right support balance of the ramp in the absence of obstacles. Figure 5 As shown, the rotating A-frame support 4 is arranged in the middle and on the right side of the ramp.

[0043] The methods for opening and closing evacuation ramps are as follows:

[0044] When opened, S1, the four pedals gradually unfold to form an escape ramp; S2, the main support leg 11 is equipped with an air spring 13 connected to the evacuation ramp, the air spring 13 pushes the main support leg 11 to rotate, causing the main support leg 11 to open automatically; S3, the evacuation ramp continues to extend, making the main support leg perpendicular to the ground and supporting the ground; S4, if the evacuation ramp encounters an obstacle during its extension, the obstacle will hinder the main support leg from continuing to move forward, the main support leg will rotate in the opposite direction of the evacuation ramp extension, and drive the secondary support leg to rotate in the same direction, so that the main and secondary support legs simultaneously support the ground in an A-shape.

[0045] During retraction, S5: Manually move the secondary support leg to rotate it in the opposite direction to the evacuation ramp. S6: When the secondary support leg overlaps with the main support leg, the secondary support leg, through a baffle, drives the main support leg to rotate together. The baffle on the secondary support leg extends to one side of the main support leg, causing it to rotate as well. S7: When the legs are close to pedal four, temporarily fix them. The fixing method is not fixed; hooks or other devices can be used. The purpose of temporary fixing is to free the operator's hands, allowing the support legs to automatically retract during pedal retraction. S8: As pedals three and four continue to retract, they compress the temporarily fixed support legs, causing them to finally rest close to pedal four. S9: Release the temporary fixation for the next automatic deployment.

[0046] Embodiment 2

[0047] The present application provides a kind of evacuation door evacuation ramp opening and closing method.As shown in Figures 1-5 The main supporting leg and the secondary supporting leg are provided with torsion spring 14 for driving a certain angle between the two, the main supporting leg drives torsion spring 14, and the secondary supporting leg 12 and the main supporting leg 11 are in the shape of a herringbone structure driven by torsion spring 14.The main supporting leg 11 and the secondary supporting leg 12 are provided with a pull rod 15 for controlling the maximum relative angle between the two, the pull rod 15 is provided with a sliding groove 16, one end of the pull rod 15 is connected to the secondary supporting leg 12, and the main supporting leg 11 is connected through the sliding groove 16.

[0048] The steps when the evacuation ramp is opened are as follows:

[0049] S1, open the folded evacuation ramp 1, so that the evacuation ramp 1 is stretched into a flat plate;

[0050] The evacuation ramp 1 is composed of multiple steps, and the steps are sequentially connected to form a long rectangular flat plate for escape.

[0051] S2, open the main supporting leg 11, so that the main supporting leg 11 is perpendicular to the ground, and the main supporting leg 11 drives the secondary supporting leg 12 to form a certain angle with the main supporting leg 11, so that the main and secondary supporting legs are in the shape of a herringbone. The main supporting leg and the secondary supporting leg are provided with torsion spring 14 for driving a certain angle between the two, the main supporting leg drives torsion spring 14, and the secondary supporting leg 12 and the main supporting leg 11 are in the shape of a herringbone structure driven by torsion spring 14. The main supporting leg 11 and the secondary supporting leg 12 are provided with a pull rod 15 for controlling the maximum relative angle between the two, the pull rod 15 is provided with a sliding groove 16, one end of the pull rod 15 is connected to the secondary supporting leg 12, and the main supporting leg 11 is connected through the sliding groove 16.

[0052] S3, stretch the evacuation ramp 1, and gradually approach the ground at the front end of the evacuation ramp 1, so that the main supporting leg 11 is supported on the ground. As shown in Figure 4 When the ramp is unfolded, as the step four 10 and the step three 9 are unfolded, the rotating herringbone supporting leg 4 is automatically opened to the limit position shown in the figure by the air spring 13 connected to the main supporting leg 11, the main supporting leg 11 is limited by the limiting block, and the secondary supporting leg 12 is pushed away by the torsion spring 14 and limited by the pull rod 15. In the ideal state without obstacles, the ramp can be supported only by the main supporting leg 11 after unfolding.

[0053] S4. If the main supporting leg 11 encounters an obstacle when stretching the evacuation ramp 1, the main supporting leg will rotate in the opposite direction of the evacuation ramp stretching direction, and since the main supporting leg and the secondary supporting leg are provided with a pull rod, the pull rod pulls the secondary supporting leg to rotate in the same direction, so that the main and secondary supporting legs are simultaneously supported on the ground in the shape of a herringbone.

[0054] As Figure 6 shown, when the ramp encounters obstacles such as sleepers, spikes, and rail repositioners during extension, the main support leg 11 rotates backward, compressing the air spring 13, and at the same time, the secondary support leg 12 is rotated together through the pull rod 15, and is changed to support with both legs at the same time, forming a structure similar to a ladder.

[0055] Example 3

[0056] As Figures 1-5 shown, the present application provides a method for opening and closing an evacuation ramp of an evacuation door.

[0057] The steps for recycling the evacuation ramp are as follows:

[0058] S5. Manually turn the secondary support leg 12 in the opposite direction of the ramp extension.

[0059] S6. When the secondary support leg 12 coincides with the main support leg 11, the secondary support leg 12 rotates the main support leg 11 together in the same direction.

[0060] As Figure 7 shown, the secondary support leg 12 is provided with a baffle 17, which extends on one side of the main support leg 11, and the secondary support leg 12 rotates the main support leg 11 together through the baffle 17.

[0061] S7, when the support leg approaches the back of the step, the step and the support leg are temporarily fixed.

[0062] As Figures 8-9 shown, the step is provided with a pull ring 18, and the secondary support leg is provided with a hook 19, the opening direction of the hook is towards the step direction, and the pull ring 18 is hooked on the hook 19 to be temporarily fixed.

[0063] S8, the ramp is recycled, and the multiple steps are folded in turn, the frontmost step and the second frontmost step are pressed against the support leg, and the pull ring 18 and the hook 19 are automatically separated after the support leg is attached to the back of the fourth step.

[0064] S9, the temporary fixing of the step and the support leg is released, and the ramp recycling is completed.

[0065] When the ramp is recycled in place, the fourth step 10 and the third step 9 continue to press and rotate the ladder support leg 4 to make it close to the back of the fourth step, at this time the pull ring 18 and the hook 19 are automatically separated, and the next time the ramp needs to be expanded, the support leg will be automatically expanded.

[0066] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, no reference signs in the claims being regarded as limiting the claim in which they are used.

Claims

1. A method of opening and closing an evacuation ramp of an evacuation door, characterized by, The evacuation ramp comprises a plurality of folded steps, the bottom of the frontmost step is provided with a support leg, the support leg comprises coaxial rotating main support leg and auxiliary support leg; the opening and closing method of the evacuation ramp comprises the following steps: When opening the ramp: S1. Open the folded evacuation ramp to stretch the evacuation ramp into a flat plate; The evacuation ramp is composed of a plurality of steps, and the plurality of steps are sequentially connected to form a ramp for escape; S2. Open the main support leg to make the main support leg close to vertical with the ground, and the main support leg drives the auxiliary support leg to form a certain angle with the main support leg, so that the main support leg and the auxiliary support leg form a herringbone shape; S3. Stretch the evacuation ramp, and gradually approach the ground at the front end of the evacuation ramp to make the main support leg support on the ground; S4. If the main support leg encounters an obstacle when stretching the evacuation ramp, the main support leg and the auxiliary support leg rotate in the opposite direction of the stretching direction of the evacuation ramp, so that the herringbone-shaped main support leg and auxiliary support leg simultaneously support the ground; When recovering the ramp: S5. Manually turn the auxiliary support leg in the opposite direction of the stretching direction of the ramp; S6. When the auxiliary support leg coincides with the main support leg, the auxiliary support leg drives the main support leg to rotate in the same direction; S7. When the support leg approaches the back of the step, temporarily fix the step and the support leg; S8. Recover the ramp to fold the plurality of steps in sequence, and press the frontmost step and the second frontmost step against the support leg to make the support leg fit on the back of the frontmost step; S9. The temporary fixing of the step and the support leg is released, and the ramp recovery is completed.

2. The method of claim 1, wherein The main support leg is provided with an air spring, and the other end of the air spring is arranged on the step, and in S2, the main support leg is driven by the air spring to automatically open.

3. The method of claim 1, wherein the evacuation door and the evacuation ramp are opened and closed by a single door operator. The main support leg and the auxiliary support leg are provided with a torsion spring for driving the two to form a certain angle, and in S2, the main support leg drives the torsion spring, and the torsion spring drives the auxiliary support leg to form a herringbone structure with the main support leg.

4. The method of claim 3, wherein The main support leg and the auxiliary support leg are provided with a pull rod for controlling the maximum relative angle of the two, the pull rod is provided with a sliding groove, one end of the pull rod is connected to the auxiliary support leg, and the pull rod is connected to the main support leg through the sliding groove, and in S4, when an obstacle is encountered, the main support leg rotates in the opposite direction of the stretching direction of the ramp, and the pull rod drives the auxiliary support leg to rotate in the same direction, so that the herringbone-shaped double support legs support the ground.

5. The method of claim 1, wherein the evacuation door and the evacuation ramp are opened and closed by a single door operator. The auxiliary support leg is provided with a baffle, the baffle extends on one side of the main support leg, and in S6, the auxiliary support leg drives the main support leg to rotate in the same direction through the baffle.

6. The method of claim 1, wherein the evacuation door and the evacuation ramp are opened and closed by a single door operator. The step is provided with a pull ring, the auxiliary support leg is provided with a hook, the opening direction of the hook faces the hinge direction of the step and the auxiliary support leg, and in S7, the pull ring is hooked on the hook to be temporarily fixed.

7. The method of claim 6, wherein the evacuation door and the evacuation ramp are opened and closed by a single door operator. In S9, the frontmost step and the second frontmost step press the support leg, and the support leg fits on the step to automatically release the pull ring and the hook.

8. The method of claim 1, wherein the evacuation door and the evacuation ramp are opened and closed by a single door operator. The ramp is composed of four steps connected in sequence.

9. The method of claim 1, wherein the evacuation door and the evacuation ramp are opened and closed by a single door operator. After the ramp is unfolded, the frontmost end is not more than 120mm away from the rail surface, and forms an angle of 24° with the ground.

10. The method of claim 1, wherein, The ramp is arranged on the left side of the driver's room, and after the ramp is unfolded, it is deflected by 5° to the right side of the driver's room.

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