KR20130024068A - Automatic step plate for passenger car - Google Patents

Abstract

PURPOSE: An automatic foothold device for a railway vehicle is provided to makes passengers easily get onto and off from the railway vehicle as an indoor floor of the railway vehicle and a platform are connected by a foothold unit at same height. CONSTITUTION: An automatic foothold device for a railway vehicle comprises a frame unit(100), foothold units(200,300), and a driving unit. The top face of the frame unit and the indoor floor of the railway vehicle are placed on a same plane. The foothold units are linearly moved in the frame unit to draw out from the frame unit to a platform. The frame unit comprises a body part and protruded support parts. The foothold units are received in the body part. The protruded support parts are formed in both ends of the front side of the body part to support both ends of the foothold units when the foothold units are drawn out from the body part.

Description

Movable Scaffolding Device for Railway Vehicles {Automatic Step Plate for Passenger Car}

The present invention relates to a movable scaffolding device for a railway vehicle. More specifically, passengers can easily get on and off the railroad car by connecting the indoor floor of the railroad car and the platform at the same height through the scaffolding unit that is drawn out in the direction of the platform from the frame unit which is flush with the indoor floor of the railroad car. It has a more secure structure by strengthening the supporting force on the scaffolding unit through the protruding support supporting the scaffolding unit, and the scaffolding unit is drawn out step by step to the platform, so that passengers can move more conveniently and safely. The present invention relates to a movable scaffolding device for a railroad car that can get on and off a vehicle.

In general, the door of the railroad car is formed to have a certain height from the ground, and the platform corresponding to the door height of the railroad car is installed at the railway station where the railroad car stops for getting on and off passengers through the door, and the passengers You are getting on or off the railroad car through the door of the car.

At this time, the platform installed in each train station is installed in two kinds of platform with relatively high height and low platform with relatively low height. Accordingly, passengers can easily get on and off the railroad cars according to the platform type. A separate movable scaffolding device is installed.

In other words, in a room where a door of a railroad car is formed, a stairway is provided to descend from the indoor floor of the railroad car toward the platform, and the door staircase is installed to correspond to the height of the low-floor platform so that the railroad car is connected to the train station of the low-floor platform. When stopping, it is configured to allow passengers to easily get off the platform via the door stairs. However, if the railroad car stops at the railway station of the solid platform, the door stairs are located at a position lower than the height of the platform, so a separate movable scaffolding device is installed on the door stairs of the railroad car for easy passengers getting on and off. have.

The movable scaffolding device for a railroad vehicle is a device for connecting the indoor floor of the railroad car and the platform at the same height for the passengers to get on and off, and operates in such a manner that the railroad car is withdrawn or deployed from the railroad car only when the railroad car stops on a solid platform. The mobile scaffolding apparatus for a railroad vehicle according to the prior art has a problem that its use is very inconvenient and unsafe, such as a structure that is simply installed by hand or has a weak structural strength and is easily broken or broken.

The present invention has been invented to solve the problems of the prior art, the object of the present invention is to the indoor floor surface of the railway vehicle through the scaffolding unit which is drawn out in the direction of the platform from the frame unit which is coplanar with the interior floor surface of the railway vehicle It is to provide a movable scaffolding device for a railroad car to connect the platform to the same height so that passengers can get on and off the railroad car easily.

Another object of the present invention is to form a protruding support so as to support the scaffolding unit drawn out from the frame unit, thereby strengthening the support force for the scaffolding unit in the state in which the scaffolding unit is pulled out, thereby providing a movable scaffolding device for a railway vehicle having a more secure structure. To provide.

Still another object of the present invention is to separate the first scaffold module and the second scaffold module so that the scaffold unit drawn out from the frame unit can be extended to the platform so that the passengers can get on and off the railway vehicle more conveniently and safely. It is to provide a movable scaffolding device for a railway vehicle to enable.

According to an aspect of the present invention, there is provided a movable scaffolding device for a railroad car installed at an entrance and exit of a railroad car so that passengers can easily get on and off a platform, the frame unit having an upper surface mounted on the same plane as an indoor floor of the railroad car; A scaffolding unit mounted on the inside of the frame unit to be linearly movable so that the frame unit can be pulled out from the frame unit; And a driving unit for linearly driving the scaffolding unit, wherein the frame unit supports the main body portion in which the scaffolding unit is accommodated, and both side ends of the scaffolding unit when the scaffolding unit is withdrawn from the main body. It provides a movable scaffolding device for a railway vehicle, characterized in that it comprises a projecting support portion protruding to both sides of the front surface of the main body portion.

In this case, a protective cover may be mounted on the front surface of the main body to open and close the inner space depending on whether the scaffolding unit is pulled out.

In addition, a bellows cover which is folded or unfolded according to whether the scaffolding unit is pulled out may be mounted on surfaces facing each other.

On the other hand, the scaffolding unit is a first scaffolding module that is accommodated in the body portion of the frame unit and coupled to the frame unit so as to be linearly withdrawn to the end of the protruding support; And a second scaffold module coupled to the first scaffold module to be linearly movable so as to be withdrawn from the first scaffold module.

The driving unit may include a first driving module fixedly mounted to the frame unit to drive the first scaffold module to move linearly; And a second driving module fixedly mounted to the first scaffold module to drive the second scaffold module to move linearly.

In this case, the first drive module may include a drive roller and a driven roller rotatably mounted to the frame unit so as to be positioned at the front end and the rear end of the first scaffold module, respectively; A drive belt wound around the drive roller and the driven roller and linearly moved by the rotation of the drive roller; And a driving motor for rotationally driving the driving roller, wherein the first scaffold module may be coupled to the driving belt to linearly move.

In addition, the frame unit may be equipped with a first guide rail to guide the linear movement path of the first scaffold module.

On the other hand, the first scaffold module has a guide protrusion formed on the outer surface to slide the first guide rail and the first scaffold frame linearly moved by the first drive module; A first scaffold plate coupled to an upper surface of the first scaffold frame; And a second guide rail mounted on an inner side surface of the first scaffold frame to guide a linear movement path of the second scaffold module.

The second scaffold module may further include a second scaffold frame having a guide protrusion formed on an outer surface of the second scaffold so as to be slide-coupled with the second guide rail and linearly moved by the second driving module; And it may be configured to include a second scaffold plate hinged to the front of the second scaffold frame.

In this case, the first scaffolding frame of the first scaffolding module supports the second scaffolding plate to restrain the rotational movement of the second scaffolding plate in a state where the second scaffolding plate is not withdrawn from the first scaffolding module. The rod can be mounted.

In addition, the second drive module may include a pneumatic cylinder operated by air pressure; And a link module, one end of which is connected to the pneumatic cylinder and the other end of which is connected to the second scaffold module, wherein the link module is rotatably coupled to the first scaffold module to be folded according to the operation of the pneumatic cylinder. And may be operable to move the second scaffold module.

In this case, the link module may include a driving link having one end connected to the pneumatic cylinder and the stop part rotatably coupled to the first scaffold module; And a driven link having one end connected to the drive link and the other end connected to the second scaffold module.

According to the present invention, the passengers can get on and off the railroad car by connecting the indoor floor of the railroad car and the platform at the same height through the scaffolding unit that is drawn out in the direction of the platform from the frame unit which is coplanar with the indoor floor of the railroad car. There is an effect that can be easily performed.

In addition, by forming a protruding support so as to support the scaffolding unit drawn out from the frame unit, it is possible to have a more secure structure by reinforcing the support force for the scaffolding unit in the state where the scaffolding unit is drawn out.

In addition, by separating the first scaffolding module and the second scaffolding module so that the scaffolding unit that is withdrawn from the frame unit can be extended to the platform, it can be withdrawn step by step, so that passengers can get on and off the railway vehicle more conveniently and safely. have.

In addition, by combining the second scaffold module of the scaffolding unit in the hinge structure, even if there is a slight difference in the height of the second scaffolding module and the platform, the second scaffolding unit is rotated and inclined so that the interior of the railway vehicle without stepping on the platform The floor surface and the platform can be connected to have a safer ride.

1 is a perspective view schematically showing an installation form of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention;
2 is an operating state diagram schematically showing an operating state of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention;
3 is an exploded perspective view schematically showing the configuration of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention;
4 is an exploded perspective view illustrating an enlarged configuration of a first scaffolding module and a first driving module of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention;
5 is an operating state diagram schematically showing an operating state of the first scaffolding module and the first driving module of the movable scaffolding device for a railway vehicle according to an embodiment of the present invention;
6 is an enlarged perspective view illustrating a configuration of a second scaffolding module and a second driving module of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention;
7A and 7B are diagrams schematically illustrating an operating state of a second scaffolding module and a second driving module of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a perspective view schematically showing the installation form of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention, Figure 2 is a schematic view showing an operating state of the movable scaffolding device for a railway vehicle according to an embodiment of the present invention 3 is an exploded perspective view schematically showing the configuration of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention.

The movable scaffolding device 10 for a railroad vehicle according to an embodiment of the present invention connects an indoor floor P1 and a platform Q of the railroad vehicle P to facilitate entrance and exit of passengers. It is installed in the frame unit 100, the scaffolding unit (S), and comprises a drive unit 400.

The frame unit 100 is mounted so that its upper surface is flush with the interior bottom surface P1 of the railroad vehicle P, and the main body portion 101 in which the scaffolding unit S is retractably received therein, and the scaffolding unit It is configured to include a protruding support portion 102 protruding from both sides of the front surface of the main body portion 101 so as to support both side ends of the scaffolding unit S when S is withdrawn from the main body portion 101. That is, as shown in FIG. 1, a staircase P2 descending from the indoor bottom surface P1 of the railway vehicle P toward the platform Q is installed at the entrance and exit of the railway vehicle P, and the frame unit 100 is provided. The main body portion 101 of the railroad car (P) is disposed adjacent to the staircase (P2) so as to form the same plane as the indoor floor surface (P1), the projecting support (102) to be located in the vertical upper portion of the staircase (P2) It is formed in the same plane as the main body 101.

As shown in FIG. 3, the frame unit 100 includes a support frame module 110 composed of a plurality of frames, and an upper cover coupled to upper and lower ends of the support frame module 110 so that an accommodation space is formed therein. 130 and the lower cover 120, the support frame module 110 is a side frame 111 spaced apart in parallel to each other in a direction toward the platform (Q), both ends of the side frame 111 It may be composed of a cross frame 112 connected to the rear end of each. At this time, the side frame 111 is preferably formed integrally so that the main body portion 101 and the protruding support portion 102 can be formed at the same time, the structural strength of the frame unit 100 can be further improved. .

The scaffolding unit S is mounted to be linearly movable inside the frame unit 100 so that the scaffolding unit S can be pulled out from the main body 101 of the frame unit 100 in the platform direction. The scaffolding unit S is drawn out toward the platform from the first scaffolding module 200 and the first scaffolding module 200 which extends from the main body portion 101 of the frame unit 100 to the end of the protruding support portion 102. It may be configured to include a second scaffold module 300.

The driving unit 400 is a device for driving the scaffolding unit S to linearly move in the direction in which the scaffolding unit S is drawn out toward the platform. The driving unit 400 drives the first scaffolding module 200 and the second scaffolding module 300. Although it may be configured to drive with one driving device, the first driving module 410 for linearly driving the first scaffold module 200 and the second driving module for linearly driving the second scaffold module 300 ( 420 may be formed independently of each other.

According to this structure, the movable scaffolding device for a railway vehicle according to an embodiment of the present invention has the scaffolding unit S in the main body portion 101 of the frame unit 100 in the reference state as shown in FIG. It is held in the accepted form, and thus the entrance staircase P2 of the railway vehicle P is kept open, so in this state the passengers are coplanar with the interior floor surface P1 of the railway vehicle P. It is possible to get on and off along the doorway stairs P2 from the upper surface of the main body unit 101. As such, when the passengers get on and off along the entrance stairs P2, the platform may correspond to a low platform.

If the platform is a solid platform, since the height of the doorway stairs P2 of the railroad car is different from the height of the platform, the movable scaffolding device according to an embodiment of the present invention operates to compensate for this. As shown in (b) and (c), the scaffolding unit S accommodated in the main body portion 101 of the frame unit 100 operates in a manner to be drawn out toward the platform Q. As the scaffolding unit S is drawn as described above, the platforms Q are connected to each other at approximately the same height from the indoor floor P1 of the railway vehicle P, so that passengers can easily get on and off along the scaffolding unit S. have. At this time, the scaffolding unit (S) is the first scaffold module 200 as shown in (b) of FIG. 2 is first drawn out to the end of the protruding support 102, then as shown in (c) of FIG. Likewise, the second scaffold module 300 is configured to be drawn out toward the platform Q.

Therefore, in the movable scaffolding device for a railroad vehicle according to an embodiment of the present invention, when the height of the doorway stairs P2 of the railroad car is different from the height of the platform Q, the scaffolding unit S is moved from the frame unit 100 to the platform ( By being withdrawn to Q), the passengers can be safely and easily carried out. At this time, the frame unit 100 is formed so that the protruding support portion 102 is formed to support both side ends of the scaffolding unit (S) drawn out from the main body portion 101, thereby achieving a more stable structure, thereby causing damage or Less damage can be used for longer periods of time, as well as ensuring a safer passenger ride process.

On the other hand, the bellows cover 132, which is folded or unfolded as the scaffolding unit S is drawn out or received from the main body 101, as shown in FIGS. It may be mounted, thereby preventing foreign matter from entering the interior of the frame unit 100 to protect various components accommodated in the frame unit 100. In addition, the front cover of the main body portion 101 may be equipped with a protective cover 131 that can open and close the inner space according to whether the scaffolding unit (S) is pulled out, the protective cover 131 is attached to the main body portion 101 It is coupled to the hinge structure can be configured to be rotatable by its own weight. The protective cover 131 may also close the front surface of the main body 101 to prevent the inflow of foreign matter into the frame unit 100 and to protect the components inside.

Next, the configuration of the scaffolding unit S and the driving unit 400 will be described in more detail with reference to FIGS. 4 to 7.

4 is an exploded perspective view illustrating an enlarged configuration of a first scaffold module and a first driving module of a movable scaffolding device for a railroad vehicle according to an embodiment of the present invention, and FIG. 5 is a railroad vehicle according to an embodiment of the present invention. FIG. 6 is a view illustrating an operating state of the first scaffolding module and the first driving module of the movable scaffolding device. FIG. 6 is a diagram illustrating the second scaffolding module and the second scaffolding of the movable scaffolding device for a railway vehicle according to an embodiment of the present invention. 7 is a perspective view illustrating an enlarged configuration of a drive module, and FIGS. 7A and 7B schematically illustrate operating states of a second scaffold module and a second drive module of a movable scaffolding device for a railway vehicle according to an embodiment of the present invention. This is a working state diagram.

As described above, the scaffolding unit S is accommodated in the main body 101 of the frame unit 100 and is linearly coupled to the frame unit 100 such that the first scaffold can be pulled out to the end of the protruding support 102. The module 200 and the second scaffold module 300 are linearly coupled to the first scaffold module 200 so as to be pulled out from the first scaffold module 200 toward the platform Q.

The driving unit 400 includes a first driving module 410 and a second driving module 420 for linearly driving the first scaffold module 200 and the second scaffold module 300, respectively. The first driving module 410 is fixedly mounted to the frame unit 100, and the second driving module 420 is fixedly mounted to the first scaffolding module 200 to move together with the first scaffolding module 200.

In more detail, as illustrated in FIG. 4, the first driving module 410 is rotatably mounted to the frame unit 100 so as to be positioned at the front and rear ends of the first scaffold module 200 along the withdrawal direction. The drive roller 411 and the driven roller 412, the drive belt 413 wound up by the drive roller 411 and the driven roller 412, and are linearly moved by the rotation of the drive roller 411, and the drive roller 411 It may be configured to include a drive motor 415 for driving the rotation.

At this time, the drive belt 413 is equipped with a separate coupler 414 to be coupled to the first scaffold module 200, the first scaffold module 200 through the coupler 414 drive belt ( It may be coupled to 413 and configured to move linearly with the drive belt 413. In addition, the first guide rail 140 is drawn out of the first scaffold module 200 in the frame unit 100 so that the linear movement path of the first scaffold module 200 moving together with the driving belt 413 may be guided. Longitudinally disposed along the direction, the guide protrusion 211 may be formed in the first scaffold module 200 to be slide-coupled with the first guide rail 140.

Meanwhile, the first scaffold module 200 may include a first scaffold frame 210 linearly moved by the first driving module 410 and a first scaffold plate 220 coupled to an upper surface of the first scaffold frame 210. And a second guide rail 240 mounted on an inner side surface of the first scaffold frame 210 to guide the linear movement path of the second scaffold module 300. The first scaffold frame 210 forms a basic support structure of the first scaffold module 200, and the guide protrusion 211 slidably coupled to the first guide rail 140 described above is formed on the outer surface. In addition, the second guide rail 240 mounted on the inner surface of the first scaffold frame 210 may allow the second scaffold module 300 to linearly move relative to the first scaffold module 200. It is formed long along the moving direction of (300).

According to this structure, as shown in FIGS. 5A and 5B, when the driving motor 415 rotationally drives the driving roller 411, the driving belt 413 wound around the driving roller 411 is advanced. Alternatively, the backward movement, and thus the first scaffold module 200 coupled to the drive belt 413 moves forward or backward together with the drive belt 413. Therefore, the drive belt 413 is preferably applied as a timing belt for more precise movement control.

Meanwhile, the second scaffold module 300 includes a second scaffold frame 310 linearly moved by the second driving module 420 and a second scaffold plate 320 hinged to the front surface of the second scaffold frame. It is configured by. The second scaffold frame 310 forms a basic support structure of the second scaffold module 300, and the guide protrusion 311 which is slide-coupled with the second guide rail 240 of the first scaffold module 200 described above on the outer surface thereof. ) Is formed, and the second scaffold plate 320 is rotatably coupled to the front surface of the second scaffold frame 310 through a hinge 330, as shown in (c) of FIG. 2. Even though the height is different from the hinge 330 is rotated by its own weight around the hinge 330 is disposed obliquely, it can be connected to the platform (Q) without a step.

In this case, the second scaffolding plate 320 is hinged to the first scaffolding frame 210 of the first scaffolding module 200 in a state in which the second scaffolding plate 320 that is hinged in this manner is not drawn out from the first scaffolding module 200. It is preferable that the support rod 230 for supporting the second scaffold plate 320 is mounted so that rotational movement about the hinge 330 of FIG. The support rod 230 is preferably formed in a rotatable roller shape so that the second scaffold plate 320 can be easily withdrawn.

On the other hand, the second drive module 420 is a pneumatic cylinder 421 operated by pneumatic pressure, and one end is connected to the pneumatic cylinder 421, the other end is connected to the second scaffold module 300, the link module 422 It can be configured to include. At this time, the link module 422 is rotatably coupled to the first scaffold module 200 is folded in accordance with the operation of the pneumatic cylinder 421 is configured to operate in a manner to move the second scaffold module 300. .

In more detail, as shown in FIG. 6, the link module 422 includes a drive link 422a having a stop portion rotatably coupled to the first scaffold module 200 through a rotation pin 422c, and a drive link ( And a driven link 422b coupled to one end of 422a. The driving link 422a is connected to the pneumatic cylinder 421 at the other end in a state in which the driving link 422a is rotatably coupled to the first scaffold module 200 through the rotation pin 422c, and one end of the driven link 422b is the driving link. It is connected to one end of the (422a) and the other end is connected to the second scaffold module 300.

Therefore, when the pneumatic cylinder 421 is operated as shown in FIGS. 7A and 7B, the drive link 422a rotates about the rotation pin 422c, and accordingly, the driven link connected to the drive link 422a. 422b rotates in conjunction. Since the other end of the driven link 422b is coupled to the second scaffold module 300, the second scaffold module 300 moves linearly in the forward or backward direction on the link connection structure.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: frame unit 101: main body
102: protruding support 200: first scaffold module
300: second scaffold module 400: drive unit
410: first drive module 420: second drive module

Claims (12)

In the movable scaffolding device for a railroad car, which is installed at the entrance of a railroad car so that passengers can get on and off the platform,
A frame unit mounted so that an upper surface thereof is coplanar with an indoor bottom surface of the railway vehicle;
A scaffolding unit mounted on the inside of the frame unit to be linearly movable so that the frame unit can be pulled out from the frame unit; And
Drive unit for linearly driving the scaffolding unit
The frame unit includes a main body portion in which the scaffolding unit is accommodated, and protrudes from both side ends of the front surface of the main body so as to support both side ends of the scaffolding unit when the scaffolding unit is withdrawn from the main body. A movable scaffolding device for a railway vehicle, comprising a projecting support.
The method of claim 1,
A front cover of the main body portion is a movable scaffolding device for a railroad vehicle, characterized in that the protective cover for opening and closing the inner space is mounted according to whether the scaffolding unit is drawn out.
The method of claim 2,
The bellows cover which is folded or unfolded according to whether the scaffolding unit is pulled out is mounted on opposite surfaces of the protruding support unit.
The method according to any one of claims 1 to 3,
The scaffolding unit
A first scaffold module accommodated in the main body of the frame unit and linearly coupled to the frame unit to be drawn out to an end of the protruding support portion; And
A second scaffold module coupled to the first scaffold module to be linearly movable so as to be withdrawable from the first scaffold module
Railroad car moving scaffolding device comprising a.
The method of claim 4, wherein
The drive unit is
A first driving module fixedly mounted to the frame unit to drive the first scaffold module to move linearly; And
A second driving module fixedly mounted to the first scaffold module to drive the second scaffold module to move linearly
Railroad car moving scaffolding device comprising a.
The method of claim 5, wherein
The first driving module
A driving roller and a driven roller rotatably mounted to the frame unit so as to be positioned at the front end and the rear end of the first scaffold module, respectively;
A drive belt wound around the drive roller and the driven roller and linearly moved by the rotation of the drive roller; And
A drive motor for rotationally driving the drive roller
And a first scaffold module coupled to the drive belt to move linearly.
The method of claim 5, wherein
And the first guide rail is mounted to the frame unit so as to guide the linear movement path of the first scaffold module.
The method of claim 7, wherein
The first scaffold module
A first scaffold frame having a guide protrusion formed on an outer surface of the first guide rail so as to slide-fit with the first guide rail, and linearly moving by the first driving module;
A first scaffold plate coupled to an upper surface of the first scaffold frame; And
A second guide rail mounted on an inner side surface of the first scaffold frame to guide a linear movement path of the second scaffold module;
Railroad car moving scaffolding device comprising a.
The method of claim 8,
The second scaffold module
A second scaffold frame having a guide protrusion formed on an outer surface of the second guide rail to be slide-coupled with the second guide rail, and linearly moved by the second driving module; And
A second scaffold plate hinged to the front of the second scaffold frame
Railroad car moving scaffolding device comprising a.
The method of claim 9,
The first scaffold frame of the first scaffold module has a support rod for supporting the second scaffold plate such that the rotational movement of the second scaffold plate is constrained while the second scaffold plate is not withdrawn from the first scaffold module. Movable scaffolding device for a railway vehicle, characterized in that the mounting.
The method of claim 5.
The second drive module
Pneumatic cylinder operated by pneumatic pressure; And
A link module having one end connected to the pneumatic cylinder and the other end connected to the second scaffold module
And the link module is rotatably coupled to the first scaffold module to be folded according to the operation of the pneumatic cylinder and to move the second scaffold module to move the second scaffold module.
The method of claim 11,
The link module
A drive link, one end of which is connected to the pneumatic cylinder and a stop portion rotatably coupled to the first scaffold module; And
A driven link having one end connected to the drive link and the other end connected to the second scaffold module.
Railroad car moving scaffolding device comprising a.

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