KR100498128B1 - Freight car for railroad - Google Patents

Abstract

The present invention relates to a railroad railway vehicle having a freight car body having a cargo loading portion and a side door opening, comprising: a pair of doors for partitioning and closing the door opening; A plurality of sliding rollers provided below at least one of the doors; A shifting rail for supporting at least one of the sliding rollers and a lower shifter body for supporting the shifting rail in parallel to move in parallel between the closed state and the open ready state spaced outwardly. A lower shifter; An upper shifting bracket provided on an upper portion of at least one of the doors; An upper shifting operation part for supporting the upper shifting bracket so as to be movable in parallel, and allowing the door to move in parallel between a closed state and an open ready state spaced outwardly; and an upper shifting part coupled to the upper shifting operation part An upper shifter having an upper shifter body for supporting the putting operation part; A shifter driver configured to drive the upper and lower shifter bodies; And a lower fixing rail linearly aligned with the shifting rail in the open ready state to slidably support the sliding door so that the door in the open ready state can be moved in parallel with the closed door. As a result, the door can be easily opened and closed, thereby saving time and manpower to load the cargo, and also easily loading a large volume of cargo. In addition, since the door is made of a light material, it is not only easy to move, but also the load of cargo can be increased as the door becomes lighter.

Description

Railway wagons {FREIGHT CAR FOR RAILROAD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to railroad wagons, and more particularly, to railroad wagons provided with a wagon body having a cargo loading section and a side door opening.

In general, railway railcars are provided with a plurality of wheels for traveling a railroad and a freight car body provided with a cargo loading unit for loading freight, and a transverse direction in the longitudinal direction of the main body for loading cargo in the cargo loading unit. And a plurality of doors capable of opening and closing the door openings. Thus, by loading the cargo in the cargo loading through the door opening provided in the main body of the car, by closing the door opening using a plurality of doors, it is possible to transport the cargo safely.

However, such a conventional railroad wagon is generally provided with 12 doors (6 on each side) at the door openings on both sides, and a rail having a double sliding structure under the door opening where the doors are provided. Therefore, when loading or unloading cargo, the doors must be moved alternately to open and close the door openings, so that a lot of time and manpower is wasted in loading or unloading cargo.

In addition, since the door provided in the conventional railroad car is manufactured using a heavy metal material such as steel, it is not easy to move, and there is a problem that the load of the cargo is reduced due to the weight of the door.

In addition, the conventional railroad wagons have a problem that it is difficult to load a bulky cargo because the width and height of the door opening provided in the wagon body is small.

Accordingly, it is an object of the present invention to provide a railroad wagon that can be easily opened and closed to reduce the time and manpower to load or unload cargo, as well as to easily load a large volume of cargo.

In addition, another object of the present invention is to provide a railroad wagon for making a door made of a light material and not only easy to move, but also increase the load of cargo as the door becomes lighter.

According to the present invention, there is provided a railroad railcar having a freight car body having a cargo loading portion and a side door opening, comprising: a pair of doors for blocking the door opening; A plurality of sliding rollers provided below at least one of the doors; A shifting rail for supporting at least one of the sliding rollers and a lower shifter body for supporting the shifting rail in parallel to move in parallel between the closed state and the open ready state spaced outwardly. A lower shifter; An upper shifting bracket provided on an upper portion of at least one of the doors; An upper shifting operation part for supporting the upper shifting bracket so as to be movable in parallel, and allowing the door to move in parallel between a closed state and an open ready state spaced outwardly; and an upper shifting part coupled to the upper shifting operation part An upper shifter having an upper shifter body for supporting the putting operation part; A shifter driver configured to drive the upper and lower shifter bodies; And a lower fixed rail for slidably supporting the sliding roller so that the door in the ready state can be linearly aligned with the shifting rail in the open ready state so that the door in the ready state can move in parallel with the closed door. It is achieved by a dragon car.

Here, the upper and lower shifter body is rotatably provided so that the door can be moved in parallel between the closed state and the open ready state spaced outwardly, and the shifter driving unit is capable of rotatably driving the upper and lower shifter body. desirable.

A lower shifting bracket is further provided on at least one side of the sliding roller at a lower portion of the door, and the lower shifter body preferably includes a lower shifting bar to support the lower shifting bracket in parallel.

The lower shifter body may further include a lower auxiliary rail in which the door is linearly aligned with the lower fixing rail in the closed state.

A plurality of guide rollers provided at an upper portion of the door; It is preferable to further include a guide rail provided on the vehicle body body to guide the guide roller so that the door in the open ready state can move in parallel to the door in the closed state.

The upper shifting operation unit may include: an opening shifting bar which contacts the inner side of the upper shifting bracket to move the door from a closed state to an open ready state; It is preferable to include a closing shifting bar for contacting the outer side of the upper shifting bracket to move the door from the open ready state to the closed state.

It is preferable that an intermediate guide roller provided inside the one of the pair of doors and guided by the other, and an intermediate guide rail provided outside the other and guide the intermediate guide roller.

The intermediate guide roller and the intermediate guide rail are preferably provided in both of the pair of doors.

The shifter driving unit, the rotation knob; A rotating body engaged with the rotary knob and rotated by the rotation of the rotary knob; An upper rod having one side eccentrically coupled from the center of the pivot body and the other side coupled to the upper shifter body; One side is eccentrically coupled from the center of the rotating body, the other side preferably comprises a lower rod coupled to the lower shifter body.

The shifter driving unit further includes a pinion which is coupled to the rotation knob and has the same rotation axis and rotates integrally, and the rotation body is a gear in engagement contact with the pinion.

The upper rod and the lower rod preferably includes a length adjusting bolt.

The door may include a stop bar protruding to restrict sliding movement of the door at both ends of the sliding direction, and the vehicle body further includes a stopper that prevents sliding movement of the door in response to the stop bar. .

The door is preferably made of aluminum.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a railroad car 1 according to an embodiment of the present invention includes a plurality of wheels provided to travel a railroad, a cargo loading part capable of loading cargo, and a cargo loading part. The main car body 10 having the door openings opened in both sides, the door 30 of the car body body 10 is closed in a straight line so as to be opened and closed, and a pair of doors 30 are provided at each door opening, and each door ( 30 has a shifter driving unit 100 for opening and closing.

Hereinafter, in the present specification, the four doors 30 provided at both side door openings of the wagon body 10 and the four shifter driver 100 driving each door 30 have the same configuration, and thus, reference is made to FIG. 1. As a result, a pair of doors 30 and a pair of shifter driver 100 provided in the vehicle body 10 will be described, and the same configuration will be omitted.

As shown in Figures 1 to 6, the railroad railway car 1 according to an embodiment of the present invention, the door 30 is closed and the door opening of the car body body 10 to the outward direction of the door opening Upper and lower shifters 60 and 80, which are slidably displaced so as to be movable in an open ready state, and upper and lower shifters 60 for transferring the door 30 to a closed state and an open ready state. The shifter driving unit 100 for rotating the 80 and the door 30 transferred in the open ready state by the upper and lower shifters 60 and 80 may slide in parallel with the other door 30. The guide rail 20 and the lower fixing rail 25 coupled to the upper and lower portions of the 10 and the upper and lower portions of the door 30 to be slidably movable with respect to the guide rail 20 and the lower fixing rail 25. It further comprises a guide roller 50 and the sliding roller 55 is coupled.

The doors 30 are provided in pairs on both sides of the vehicle body 10. And, each door 30 is made of an aluminum material to reduce the weight and the frame 31 and the plate 32 and the rivet joint 33 is mutually riveted to increase the strength and combined with the frame 31 to repair Rope hanger 34 provided to easily separate the door 30 from the wagon body 10, a handle 35 for sliding movement of the door 30, and a protrusion formed at the bottom of both ends of the door 30 And stop bars 37 for limiting sliding movement of the door 30 by stoppers 13 provided at both ends of the vehicle body 10 in the lower end of the longitudinal direction, and an intermediate guide roller provided in the inner center of the door 30. 40 and an intermediate guide rail 45 for guiding the intermediate guide roller 40 at the outer center of the door 30. In addition, between the pair of doors 30 provided on both sides of the wagon body 10, a central separator 15 connected from the top of the wagon body 10 to the bottom is provided. In addition, a sealing material such as rubber is attached to the inner edge of the door 30 to prevent leakage when the door 30 is in the closed state.

The upper shifter 60 and the lower shifter 80 are coupled to the upper and lower portions of the wagon body 10 so that the door 30 is closed in a closed state to close the door opening of the wagon body 10 and the door opening is separated outward. Allow parallel movement in open ready.

The upper shifter 60 is provided in a pipe shape and has an upper shifter main body 61 rotated by the shifter driving unit 100 and an upper shifting operation unit which is integrally rotated by being coupled to the upper shifter main body 61.

The upper shifter body 61 is coupled to the upper rod 110 of the shifter driving unit 100, one side of which will be described later, and the other side extends to the center separator 15 of the vehicle body 10. In addition, a plurality of upper body brackets 69 are provided to couple the upper shifter body 61 to the upper portion of the wagon body 10.

The upper body bracket 69 has one side bolted to the upper portion of the vehicle body 10, the other side is rotatably coupled to the upper shifter body 61.

The upper shifting operation part includes an opening shifting bar 63 and a closing shifting bar 65, and three opening shifting bars 63 are provided in a plate shape at predetermined intervals to the upper shifter body 61. The upper shifting bracket 51 is integrally rotatably coupled and in contact with the inner side of the upper shifting bracket 51 provided on the upper portion of the door 30 to be described later to transport the door 30 in an open ready state. ) Is transferred outward of the vehicle body 10 (see FIGS. 7 to 9).

Closing shifting bar 65 is provided close to the outer side of the opening shifting bar 63, and is provided in the plate shape, such as the opening shifting bar 63 at three predetermined intervals in the upper shifter body (61) It is integrally rotatable. In addition, the closing shifting bar 65 is in contact with the outer surface of the upper shifting bracket 51 provided on the upper portion of the door 30 to be described later so that the door 30 can be moved in parallel from the ready state of the open to the closed state. The upper shifting bracket 51 is transferred in the vehicle body body 10 direction (see FIGS. 7 to 9). In addition, the opening shifting bar 63 and the closing shifting bar 65 are provided one by one in correspondence with one upper shifting bracket 51.

The lower shifter 80 is provided in a pipe shape and is coupled to the lower shifter main body 81 and the lower shifter main body 81 rotated by the shifter driving unit 100 and are integrally rotated and provided in pairs at predetermined intervals. Has a shifting rail 83 and a lower auxiliary rail 87.

The lower shifter body 81 includes a plurality of lower shifting bars 85 and a lower shifter body 81 to couple the lower shifting bracket 56 to the lower portion of the vehicle body 10 so as to support the lower shifting bracket 56 to be described later. Has a lower body bracket (89). And, one side of the lower shifter body 81 is coupled to the lower rod 120 of the shifter driver 100 to be described later, the other side extends to the center separator 15 of the vehicle body 10.

The lower body bracket 89 is bolted to one side of the lower body car body 10, the other side is rotatably coupled to the lower shifter body (81).

The shifting rails 83 are provided in a pair in a plate shape with a predetermined interval at the bottom of each door 30, one side of which is integrally rotatable to the lower shifter body 81, and the other side of the lower fixing rails ( A cross section is provided in a circular shape as shown in 25). Then, the shifting rail 83 is in contact with the sliding roller 55 provided in the lower portion of the door 30 so that the door 30 can be moved in parallel in the open ready state, the sliding roller 55 is connected to the main vehicle body 10. Is transferred outward (see FIGS. 7 to 9).

The lower shifting bar 85 is provided in a pair in a plate shape at predetermined intervals, one side is integrally rotatably coupled to the lower shifter body 81, and the other side is provided in the same shape as the lower fixing rail 25. do. In addition, the lower shifting bar 85 contacts the lower shifting bracket 56 provided at one side of the sliding roller 55 of the door 30 by providing the door 30 in parallel with the open ready state and the closed state. The lower shifting bracket 56 is conveyed outward of the wagon body 10 or in the direction of the wagon body 10 (see FIGS. 7 to 9).

The lower auxiliary rail 87 is provided in pairs at predetermined intervals in a plate shape, one side of which is integrally rotatably coupled to the lower shifter body 81, and the other side of the lower auxiliary rail 87 is provided in the same shape as the lower fixing rail 25. . In addition, the lower auxiliary rail 87 is formed such that the door 30 may be connected to the lower fixing rail 25 in a closed state (see FIGS. 7 to 9). In addition, the shifting rail 83, the lower shifting bar 85, and the lower auxiliary rail 87 are provided in correspondence with one sliding roller 55 and the lower shifting bracket 56, respectively.

The intermediate guide roller 40 and the intermediate guide rail 45 are provided in each door 30, and as shown in FIG. 10, the intermediate guide roller 40 provided in one door 30 is connected to the other door 30. It is guided to the intermediate guide rail 45 provided to be sliding.

The shifter driving unit 100 is provided as a pair on each side of the longitudinal direction of the main body, that is, the railroad railway car 1 is connected to each other to transfer each door 30 in a closed state and an open ready state. do. In addition, the shifter driving unit 100 has a rotation knob 101 which can be directly rotated by a user by hand, and a pinion 102 which is integrally rotated with the same rotation axis by being combined with the rotation knob 101 and the pinion. Gear 105, which is a rotating body rotated by the rotation of the rotary knob 101 and engaged with the 102, the upper rod 110 for transmitting the rotation of the gear 105 to the upper shifter body 61, and the gear It includes a lower rod 120 for transmitting the rotation of the 105 to the lower shifter body (81).

The gear 105 is provided in a floating shape, and the plate surface of the gear 105 is provided with a rotation center portion 106 rotatably coupled to the vehicle body body 10. In addition, the plate surface of the gear 105 has a hinge coupling portion 114 which is eccentric to the rotation center portion 106 so that one end of the upper rod 110 and the lower rod 120 is rotatably coupled.

One side of the upper rod 110 is eccentrically coupled from the center of rotation 106 of the gear 105, the other side is coupled to the upper shifter body 61 through a connecting member 113. The connecting member 113 has an inner circumferential surface that can be coupled to a spline shape formed on an outer circumferential surface of an end of the upper shifter body 61 coupled to the upper rod 110 by recessing one side to accurately transmit rotational force to the upper shifter body 61. A spline shape is provided at the other side, and is coupled to the other side by a hinge coupler 114 so as to be rotatable with the other side of the upper rod 110. And, the upper rod 110 is provided with a length adjusting bolt 111 to adjust the overall length.

One side of the lower rod 120 is eccentrically coupled from the center of rotation 106 of the gear 105, the other side is coupled to the lower shifter body 81 through the connection member 113. As described above, the connection member 113 has a spline shape formed on the inner circumferential surface thereof so as to be coupled to a spline shape formed on the outer circumferential surface of the end of the lower shifter body 81 coupled to one of the lower rods 120 by recessing one side thereof. The side is coupled by the hinge coupling portion 114 to be rotatable with the other side of the lower rod (120). Then, the lower rod 120 is provided with a length adjusting bolt 111 to adjust the overall length.

The guide rail 20 is coupled to the upper portion of the wagon body 10 along the longitudinal direction of the wagon body 10 in a cross-section having a "c" shape, and is provided in the same quantity as the door 30. And, the guide rail 20 has a plurality of roller receiving portion 21 formed to be cut to accommodate the guide roller 50 provided in the upper portion of the door 30 when the door 30 is transported in an open ready state , The door 30 is guided to the guide roller 50 when the sliding is moved in the ready to open state (see FIGS. 7 to 9).

The lower fixing rail 25 has a circular cross section and is coupled by the lower fixing rail bracket 26 to the lower portion of the vehicle body 10 along the longitudinal direction of the vehicle body 10, in the same quantity as the door 30. Prepared. In addition, when the door 30 is transported in an open ready state, the sliding roller 55 provided at the lower portion of the door 30 is moved outside the freight vehicle body 10 by a shifting rail 83 provided below the freight vehicle body 10. When the door 30 is transferred to the fully ready state, the shifting rail 83 is positioned in line with the lower fixed rail 25. Accordingly, the lower fixing rail 25 guides the sliding roller 55 that slides through the shifting rail 83.

Guide rollers 50 are provided in a pair on the upper portion of each door 30 is accommodated in the guide rail 20 through the roller accommodating portion 21 when the door 30 is transported in an open ready state. Then, the upper surface of the door 30 in close proximity to the guide roller 50 is moved by the opening shifting bar 63 or the closing shifting bar 65 to transfer the door 30 to the ready or closed state. Three upper shifting brackets 51 are provided.

Sliding roller 55 is provided in a pair with a predetermined spacing interval in the lower portion of the door 30, the shifting rail provided in the lower portion of the truck body 10 when the door 30 is transported in an open ready state ( 83) to the outside of the vehicle body 10. In addition, when the door 30 is completely transported in the ready state, the shifting rail 83 is positioned in line with the lower fixed rail 25, so that the sliding roller 55 has the shifting rail 83 and the lower fixed rail. Through 25, the slide is movable. In addition, the pair of lower shifting brackets 56 are integrally coupled to the outer surface of the sliding roller 55 to move the contact by the lower shifting bar 85 to transfer the door 30 to an open ready state or a closed state. Is provided.

With this configuration, looking at the operation of the door provided in the vehicle for the vehicle according to the embodiment of the present invention.

First, we will look at the process of the door is transferred from the closed state to the open ready state. 7 is a cross-sectional view of a state in which the door 30 is in a closed state to close the opening of the vehicle body 10. As shown in this figure, the guide roller 50 is separated from the guide rail 20 is transported in the direction of the main vehicle body 10, the sliding roller 55 is also separated from the lower fixed rail 25, the main vehicle body It is conveyed in the (10) direction. And, the state in which the door 30 is in the closed state is the same state as the shifter driver 100 placed on the right side of FIG. In this state, when the rotary knob 101 of the shifter driver 100 placed on the right side of FIG. 11 is rotated clockwise, when the door 30 is rotated to the ready state, the upper rod 110 is moved downward and at the same time, the lower rod is rotated. 120 is moved upwards so that the upper shifter body 61 is rotated counterclockwise and the lower shifter body 81 is rotated clockwise. Thus, when the door 30 is transported in an open ready state, the door 30 may have the same shape as the shifter driver 100 placed on the left side of FIG. 11. 8 is a longitudinal cross-sectional view showing a state in which the door 30 is transferred in an open ready state. As shown in the figure, the opening shifting bar 63 integrally provided on the upper shifter body 61 pushes the upper shifting bracket 51 provided on the upper part of the door to the outside to guide the guide roller 50 to the guide rail ( 20). In addition, the shifting rail 83 and the lower auxiliary rail 87 integrally provided on the lower shifter body 81 push the sliding roller 55 and the lower shifting bracket 56 provided on the lower side of the door to the outside. Reference numeral 55 became transferable to the lower fixing rail 25. Then, when the door 30 is opened, as shown in FIG. 9, the guide roller 50 is guided to the guide rail 20 and the sliding roller 55 is guided to the lower fixed rail 25. The intermediate guide roller 40 provided on the rear surface of the door 30 is accommodated and guided by the intermediate guide rail 45 provided on the outer surface of the door 30 in a closed state. And, protruding from the lower end of both sides of the door 30 is provided on the stop bar 37 and both ends of the longitudinal direction of the vehicle body 10 corresponding to the stop bar 37, the sliding movement of the door 30 By providing a stopper 13 to limit the door 30 can be safely moved.

In addition, the process in which the door 30 is moved from the open ready state to the closed state rotates the rotary knob 101 provided in the shifter driver 100 in a direction opposite to the direction in which the door 30 moves to the open ready state. Then, the upper shifter body 61 and the lower shifter body 81 are rotated by the upper rod 110 and the lower rod 120 in the opposite direction to move the door 30 to the open ready state. Then, the closing shifting bar 65 is in contact with the rear surface of the upper shifting bracket 51 to transfer the upper shifting bracket 51 in the direction of the vehicle body 10. Then, the shifting rail 83 and the lower shifting bar 85 transfer the sliding roller 55 and the lower shifting bracket 56 in the direction of the vehicle body 10. Thus, the door 30 closes the door opening of the vehicle body 10.

In the above-described embodiment, three upper shifting brackets 51 and a pair of guide rollers 50 spaced a predetermined distance from each of the doors 30 are provided, but one or more of these components may be provided. The opening shifting bar 63 and the closing shifting bar 65 corresponding to the upper shifting bracket 51 are also preferably the same as the quantity of the upper shifting bracket 51. In addition, although a pair of sliding rollers 55 and a lower shifting bracket 56 spaced a predetermined distance from the lower portion of each door 30 are provided, one or more of these components may be provided, and the sliding rollers 55 The shifting rails 83 and the lower shifting bars 85 corresponding to the lower shifting brackets 56 and the lower shifting brackets 56 are also equal to the quantity of the sliding roller 55 and the lower shifting bracket 56.

As in the above-described embodiment, the door is preferably made of aluminum, but of course, other materials, such as alloy steel, which is light and maintain strength, may be used.

As such, the railroad car according to the embodiment of the present invention includes a pair of doors provided at both sides of the main body, upper and lower shifters for transporting the doors in a closed state and an open ready state, and upper and lower shifters. By providing a shifter driving part for driving, the door can be easily opened and closed, thereby reducing time and manpower for loading cargo.

In addition, the pair of doors can be provided to close the entire one side of the main body to provide a wide opening of the main body, it is possible to easily load a large volume of cargo.

In addition, by manufacturing the door using a light aluminum material, not only is easy to move, but also the load of cargo can be increased as the door becomes lighter.

As described above, according to the present invention, the door can be easily opened and closed, so that time and manpower can be reduced, and a large volume of cargo can be easily loaded.

In addition, since the door is made of a light material, it is not only easy to move, but also the load of cargo can be increased as the door becomes lighter.

1 is a perspective view of a railroad car according to the invention,

Figure 2 is a perspective view of the door of the railroad car of Figure 1,

3 is a rear perspective view of the door of the railroad car of FIG.

4 is a perspective view of a lower shifter of the railroad car of FIG. 1;

5 is a perspective view of an upper shifter of the railroad car of FIG. 1;

6 is a rear perspective view of the upper shifter of the railroad car of FIG.

7 is a sectional view taken along line Ⅶ- 의 of the door of the railroad car of FIG. 1 closed;

8 is a cross-sectional view of the Ⅶ-Ⅶ in a state in which the door of the railroad car of FIG. 1 is in operation;

FIG. 9 is a sectional view taken along line “VIII” of the door of the railroad car of FIG. 1 open; FIG.

10 is a longitudinal cross-sectional view of the doors of the railroad car of FIG. 1 overlapped with each other;

11 is an operation state diagram of the shifter driver of the railroad car according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: railroad car 10: car body

13: stopper 15: center separator

20: guide rail 21: roller receiving portion

25: lower fixed rail 26: lower fixed rail bracket

30: door 31: frame

32: plate 33: rivet joint

34: rope hanger 35: handle

37: stop bar 40: intermediate guide roller

45: middle guide rail

50: guide roller 51: upper shifting bracket

55: sliding roller 56: lower shifting bracket

60: upper shifter 61: upper shifter body

63: opening shifting bar 65: closing shifting bar

69: upper body bracket

80: lower shifter 81: lower shifter body

83: shifting rail 85: lower shifting bar

87: lower auxiliary rail 89: lower body bracket

100: shifter driving unit 101: rotation knob

102: pinion 105: gear

106: rotation center 110: the upper rod

111: length adjusting bolt 113: connecting member

114: hinge coupling portion 120: lower rod

Claims (13)

In a railroad cart having a freight car body having a cargo loading section and a side door opening, A pair of doors for blocking the door openings; A plurality of sliding rollers provided below at least one of the doors; A shifting rail for supporting at least one of the sliding rollers and a lower shifter body for supporting the shifting rail in parallel to move in parallel between the closed state and the open ready state spaced outwardly. A lower shifter; An upper shifting shifting provided on an upper portion of at least one of the doors; An upper shifting operation part for supporting the upper shifting bracket so as to be movable in parallel, and allowing the door to move in parallel between a closed state and an open ready state spaced outwardly; and an upper shifting part coupled to the upper shifting operation part An upper shifter having an upper shifter body for supporting the putting operation part; A shifter driver configured to drive the upper and lower shifter bodies; And a lower fixing rail slidably supporting the sliding roller so that the door in the open ready state is linearly aligned with the shifting rail in the open ready state so that the door in the open ready state can move in parallel with the closed door. The door includes a stop bar protruding to limit sliding movement of the door at both ends of the sliding direction, and the vehicle body includes a stopper that prevents sliding movement of the door in response to the stop bar. Railroad wagons. The method of claim 1, The upper and lower shifter bodies are rotatably provided to allow the door to move in parallel between a closed state and an open ready state spaced outwardly, The shifter driving unit is a railcar for driving the upper and lower shifter body rotatably. The method of claim 1, A lower shifting bracket is further provided on at least one side of the sliding roller at a lower portion of the door, The lower shifter main body includes a lower shifting bar for supporting the lower shifting bracket so as to be movable in parallel. The method of claim 1, The lower shifter body further includes a lower auxiliary rail that is linearly aligned with the lower fixed rail in the closed state of the door. The method of claim 1, A plurality of guide rollers provided at an upper portion of the door; And a guide rail provided at an upper portion of the wagon body to guide the guide rollers so that the door in the open ready state can move in parallel with the door in the closed state. The method of claim 1, The upper shifting operation portion, An opening shifting bar for contacting the inner side of the upper shifting bracket to move the door from a closed state to an open ready state; And a closing shift bar for contacting the outer side of the upper shifting bracket to move the door from the open ready state to the closed state. The method of claim 1, An intermediate guide roller provided inside one of the pair of doors and guided by the other, and an intermediate guide rail provided on the other side and guiding the intermediate guide rollers is provided. . The method of claim 7, wherein And the intermediate guide roller and the intermediate guide rail are provided in both of the pair of doors. The method of claim 1, The shifter driving unit, Rotating handle; A rotating body engaged with the rotary knob and rotated by the rotation of the rotary knob; An upper rod having one side eccentrically coupled from the center of the pivot body and the other side coupled to the upper shifter body; One side is eccentrically coupled from the center of the rotating body, the other side railroad car, characterized in that it comprises a lower rod coupled to the lower shifter body. The method of claim 9, The shifter driving unit further includes a pinion coupled to the rotation knob and having the same rotation axis and integrally rotating. And the pivoting body is a gear in engagement with the pinion. The method of claim 9, The upper rod and the lower rod railroad car, characterized in that it comprises a length adjustment bolt. delete The method of claim 1, The door is a railroad car, characterized in that made of aluminum material.