KR20160136152A

KR20160136152A - Covering apparatus for cargo box

Info

Publication number: KR20160136152A
Application number: KR1020150069971A
Authority: KR
Inventors: 고재욱
Original assignee: 화신강업(주)
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2016-11-29
Also published as: KR101703735B1

Abstract

The present invention relates to a railway car, comprising: a rail part provided in two rows along a longitudinal direction of a cargo box and disposed symmetrically on both sides with respect to a space part of the cargo space; A pair of frame parts installed to be slidable on the rail part and symmetrically provided on the front and rear sides in the longitudinal direction of the rail part; And a locking part for locking the pair of frame parts to each other, wherein the frame part is formed of a C shape in cross-section and has a plurality of openings; A locking frame provided at an end of the frame portion; And a driving roller and a steering roller which are coupled to each other so as to protrude and extend in a lower end direction of each of the cell packing frame and the locking frame and are protruded to the left side of the cell packing frame and the locking frame And a bracket including an inner bracket provided on the inner side and an outer bracket provided on the outer side so as to protrude to the right side of the cloth frame and the lock frame.

Description

{COVERING APPARATUS FOR CARGO BOX}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading box cover apparatus such as a railway vehicle, a dump truck, and a container box.

More particularly, the present invention relates to a railroad car which is provided with a plurality of frames which are installed to be slidable on an upper end of a rail provided on a carriage and which cover or open the carriage, So that the width of folding of a plurality of frames can be minimized when the cover unit is disassembled to open the loading unit.

Generally, a freight vehicle is a device that moves a loaded cargo by traveling a long distance after loading cargo in a rear-mounted cargo ship. To prevent the cargo loaded on the freight car from falling, A tear film such as a tear film is provided to prevent breakage or deformation from occurring.

Such a barrier has been used mainly by loading cargo in a loading cargo, spreading a tent on it, and then connecting the loading cargo with a binding cord. However, the driver must directly lift the tent in the loading car to install the blocking film in the loading car. And it is very difficult to cover the upper part with a tent when a relatively bulky cargo is loaded.

In order to solve the above problems, a loading lid has been developed which can cover or easily release the loading box by slide motion.

As one of such loader covers, Korean Patent Laid-Open Publication No. 10-2004-0084102 discloses a truck loader cover.

FIG. 1 is a perspective view showing a state in which support poles are installed at regular intervals in a truck lid of a conventional truck, and the structure thereof is coupled to the truck itself so as to be opened and closed in the longitudinal direction on both sides of the floor 11 forming the floor. And a pair of side gates (10) formed on the upper portion and having guide grooves (12) formed in the longitudinal direction; And a roller 21 which is coupled to the guide grooves 12 of the side gate 10 and slidable back and forth along the guide grooves 12 at both ends of the side gate 10, A plurality of support poles 20 mounted on the support poles 20; A cover member 50 wrapping around the outside of the support pole 20 and having a rear curtain 52 opened and closed by a zipper 51 at the rear; Fixing means (30) provided inside the cover member (50) and fixing the cover member (50) to the support pole (20); And a position fixing member (40) provided on the side gate (10) for fixing the position where the support pole (20) slides forward and backward.

When the cargo is loaded on the loading box 1, such a truck loading cargo cover simply expands and contracts the cover member 50 for protecting the cargo by the sliding movement of the supporting pole 20 to cover or open the loading car 1 It is possible to increase the safety during running and the convenience of the user at the same time.

However, in the conventional truck lid cover, a roller 21 is provided at both lower ends of a plurality of support pole blocks 20, and the roller 21 is coupled to be slidable along the guide groove 12, The supporting pole 20 is disposed at the upper end of the guide groove 12 in the case where one roller 21 is provided at both ends of one support pole 20 having a ' The vertical state can not be maintained.

That is, the support pole 20 supported at the upper end of the guide groove 12 by the rollers 21 provided at both ends of the lower side of the support pole 20 can not maintain the upright standing state.

In order to solve such a problem, even if a plurality of rollers 21 are provided in the direction in which the support pole 20 slides, and the support pole 20 is set upright, if a plurality of rollers 21 are provided, The plurality of rollers 21 are brought into contact with each other when the plurality of support poles 20 are combined with each other to widen the interval between the support poles 20 so that the width of the support poles 20 is reduced during contraction, There is a problem that it can interfere.

Korean Patent Publication No. 10-2004-0084102 (October 2006)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a railway car which is provided with a plurality of frames which are slidably mounted on an upper end of a rail, There is provided a loading box cover device capable of minimizing the width of folding of a plurality of frames when the loading device is opened to disassemble the cover device by providing the rollers supported by the rails in a zigzag form between the frames so that each frame can be slidably moved I have to.

According to an aspect of the present invention, there is provided a loading box cover device comprising: a rail part arranged in two rows along a longitudinal direction of a loading box and disposed symmetrically on both sides with respect to a space part of the loading box; A pair of frame parts provided so as to be slidable on the rail part, the pair of frame parts being provided symmetrically on the front and rear sides in the longitudinal direction of the rail part; And a locking part for locking the pair of frame parts to each other, wherein the frame part has a cross section of a " C " A locking frame provided at an end of the frame part; And a driving roller and a steering roller which are supported by the rail and are coupled to each other so as to protrude and extend in a lower direction of each of the basket frame and the lock frame, And a bracket including an inner bracket, an outer bracket provided on the outer side so as to have a shape protruding to the right side of the cloth frame and the lock frame, and to solve the technical problem .

The present invention relates to a railroad car which is provided with a plurality of frames which are installed to be slidable on an upper end of a rail provided on a carriage so as to cover or open the carriage and in which the rollers supported on the rails are slidable in a zigzag It is possible to minimize the width of the folding of the plurality of frames when the cover is opened by disassembling the cover device, so that the volume occupied by the frame can be minimized, and the space occupied by the load can be maximized. Effect.

Further, according to the present invention, since the cover device is opened and closed on both sides, a lock portion is provided in the middle of the pair of cover devices, the cover device can be easily closed after the cargo is loaded in the cargo hold, The cover device can be dismantled only by the pulling action of the pulling force of the pulling force of the pushing force.

1 is a perspective view illustrating a state where a support pole is installed at a predetermined interval in a conventional truck lid.
FIG. 2 is a perspective view of a loading box cover apparatus according to the present invention. FIG.
FIG. 3 is a side view showing a state in which the loading box is opened in the loading-box cover apparatus according to the present invention.
FIG. 4 is a side view showing a state where the loading box is closed in the loading tray cover apparatus according to the present invention. FIG.
FIG. 5 is a front view showing a connection state of a rail part and a frame part in the loader cover device according to the present invention. FIG.
FIG. 6 is a plan view showing a frame portion in the loader cover device according to the present invention.
7A is a side view showing an example in which a frame is contacted with a conventional load-carrying cover device.
FIG. 7B is a side view showing an example in which the frame is contacted in the loader cover device according to the present invention.
8 is a front view showing a locking part in the loading tray cover device according to the present invention.
FIG. 9 is a view showing the operation of the lock unit in the loader cover unit according to the present invention.
10 is a perspective view showing another example of the loading box cover apparatus according to the present invention.

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

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. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

The present invention is characterized in that a plurality of frames are provided so as to be slidable on rails respectively provided symmetrically to a space of a loading box, and a pair of rollers provided in each frame are provided in a zigzag form between the frames, To a loading box cover device capable of minimizing the width of folding of a plurality of frames when the loading box is opened.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

FIG. 2 is a perspective view of a loading box cover apparatus according to the present invention. FIG.

The loading unit cover device according to the present invention can easily open and close the space portion 110 of the loading box 100 while minimizing the width of the space when the frame portion 300 is folded to load the cargo into the space portion 110 The frame part 300, the lock part 400, and the tent storage part 500 so as to maximize the size of the tent part.

The rail part 200 is provided in two rows along the longitudinal direction of the loading box 100 for providing a space for loading cargo and is arranged symmetrically on both sides of the space part 110 of the loading box 100, A rail supporting portion 210 and a rail 220. [

As shown in FIG. 2, the rail 200 may include a loading box 100, which is formed to have four sides of the loading box 100 and is configured to load cargo on the upper side of the space 110, 100 may be provided on the upper side of the wall formed in the lengthwise direction of the stacker 100. Depending on the design conditions, as shown in FIG. 10 to be described later, 100 may be provided on the upper left and right ends of the space 110. [

The rail supporting portion 210 performs a function of supporting the rail 220, which will be described later,

At this time, the upper surface of the rail support part 210 may have an inclined surface which is lowered from the middle part of the loading unit 100 toward the outer side.

A rail 220 to be described later is coupled to the upper side of the rail support 210 and is coupled to the rail 220 so that the frame 300 can slide on the rail 220. Rainwater or the like flows outward So that it is possible to minimize the inflow into the loading box 100.

Further, when a tent is provided on the outer surface of the frame 300, a rainwater or the like flowing along the tent is moved to the outside of the loading box 100 and is introduced into the loading box 100 by the inclined surface of the rail supporting portion 210 Can be minimized.

Referring to FIG. 5, the rail 220 includes an overall 'king' section. The rail 220 is fixedly mounted on the rail supporting part 210, and a frame part 300 to be described later is slidably installed A traveling roller 331, which will be described later, is received in and supported by a groove formed on the upper side, and a steering roller 332 is received and supported in a groove formed on the lower side.

The driving roller 331 and the steering roller 332 are supported on the upper and lower sides of the rail 220 as shown in Fig. 5 of the rail 220, so that the frame portion 300 is provided on the upper side of the rail 220 The upright state is maintained, but the slide can be moved.

The frame part 300 is provided on the upper part of the rail part 200 so as to be slidable and provided on the front and rear sides in the longitudinal direction of the rail part 200, And includes a bubble frame 310, a lock frame 320, and a bracket 330. The bubble frame 310,

3, when the locking part 400, which will be described later, which locks the middle part of the frame part 300 is released, the frame parts 300 are arranged on the front and rear sides in the longitudinal direction of the rail part 200 So that the loading box 100 is opened.

4, when the pair of frame parts 300 are slid to the middle part of the rail part 200, the frame parts 300 are brought into mutual contact with each other and the loading box 100 is closed do.

Depending on the design conditions, a tent may be further provided on the outer surface of the frame portion 300.

When the loading unit 100 is opened by unfolding the frame unit 300, rainwater or the like is prevented from being introduced into the loading unit 100 by the tent, and the frame unit 300 is narrowed to open the loading unit 100 The cargo of the loading box 100 can be protected and the frame part 300 can be easily expanded and folded by folding the left and right side surfaces and the upper side of the tent to form wrinkles.

The hopper frame 310 has a plurality of cross-sections so as to be slidable on the rail 220. The hopper frame 310 is slid forward and backward in the longitudinal direction of the rail 220, So that the space portion 110 is opened or closed.

The locking frame 320 is provided at the end of a plurality of the cellar frames 310. The locking frame 320 has a cross section in the shape of a letter C and is slidable on the rail 220, The locking frames 320 provided at the ends of the frame parts 300 are brought into contact with each other when the pair of frame parts 300 symmetrical about the middle part of the frame part 300 are slid and closed.

At this time, the protrusions 321 and the corresponding grooves 322 may be formed in each of the pair of the lock frames 320.

The brackets 330 are coupled to each other so as to protrude and extend in the lower direction of each of the plurality of the cell packing frames 310 and the locking frames 320. The brackets 330 are provided as a pair of the inner brackets 330a and the outer brackets 330b, And includes a traveling roller 331 and a steering roller 332.

At this time, the inner bracket 330a is provided in the inner direction of each of the plurality of the bubble frame 310 and the lock frame 320, and the outer bracket 330b is provided inside the plurality of the bubble frame 310 and the lock frame 320 And are symmetrically arranged with respect to the bubble frame 310 and the lock frame 320.

6, the inner bracket 330a is provided to protrude to the left side of the bubble frame 310 and the lock frame 320, and the outer bracket 330b is provided to face the bubble frame 310, And a shape protruding to the right side of the lock frame 320.

Accordingly, when a plurality of bubble frames 310 and the lock frame 230 are slidably moved and narrowed, the inner bracket 330a and the outer bracket 330b arranged in a staggered arrangement form a plurality of bubble frames 310 The inner bracket 330a provided in one cell frame 310 and the outer bracket 330b provided in the other cell frame 310 are overlapped with each other so that the widths of the cell frame 310 and the lock frame 230 Can be minimized.

The driving roller 331 is drawn into the upper space of the rail 220 having the 'Wang' shaped cross section and the steering roller 332 is drawn into the lower space of the rail 220 having the ' So that a part protruding from both sides of the rail 220 is supported on the upper side and the lower side so that the cell frame 310 and the locking frame 320 are securely supported on the rail 220 to be slidable.

At this time, the traveling roller 331 and the steering roller 332 are provided on the opposite sides of the inner bracket 330a and the outer bracket 330b, respectively. However, as shown in FIG. 6, The traveling roller 331 and the steering roller 332 are provided on the left side with respect to the cloth packing frame 310 and the lock frame 320 and are provided with a traveling roller 331 and a steering roller 332 provided on the outer bracket 330b, Is provided on the right side with respect to the cloth packing frame 310 and the lock frame 320.

5, the cloth packing frame 310 and the lock frame 320 are supported to be held in an upright state on the rail 220, and can be slidably moved, and the inner bracket 330a and the outer bracket 330, When the frame part 300 is closed, the interval between the plurality of the bubble frame 310 and the lock frame 320 can be minimized. Therefore, when the cargo is loaded into the space part 110, There is an advantage that it can be utilized more widely.

Meanwhile, when the plurality of frames are slid and opened to load the cargo in the loading box, the space between the frames is narrowed and the loading box is opened.

However, in the conventional tray cover device, it is difficult to secure a wide space for loading / unloading the cargo because the interval between the frames is wide. Therefore, it may be difficult to carry the cargo up and down.

This will be described in detail with reference to FIG. 7A.

FIG. 7A is a side view showing a state in which a frame is folded in a conventional tray cover apparatus, and a plurality of frames are provided with rollers below each frame so that each frame can be installed upright on the rails, As shown in Fig.

However, when a plurality of frames provided at predetermined intervals are closed to load the cargo in the loading box, the interval is narrowed and slid, and the narrowed interval can not be minimized by the volume occupied by the pair of rollers .

Therefore, it is difficult to secure a space for loading the cargo in the loading box, and the cargo or the frame may be damaged when the cargo is loaded on a long type of cargo such as a pipe or the like. There is a problem.

7B, the brackets 330 for supporting the plurality of bubble frames 310 and the lock frame 320 are provided as an inner bracket 330a and an outer bracket 330b, When the frame part 300 is closed to load the cargo, the plurality of the bubble frame 310 and the lock frame 320 are arranged to protrude leftward and rightward with respect to the frame 310 and the lock frame 320, respectively, Since the interval between the frames 320 is minimized, a space for loading or unloading the cargo to or from the loading box 100 can be secured more widely, which is advantageous in its utilization.

The locking part 400 is configured to fasten the locking frame 320 provided at the front end of the frame part 300 formed on the front and rear sides of the space part 110 of the loading box 100, (Not shown), and a central locking device 410 and an unlocking rope 420.

When the loading unit 100 is to be closed, the frame unit 300 is unfolded. Each of the pair of frame units 300 is slid toward the middle side of the loading unit 100, The locking frames 320 are brought into contact with each other. At this time, the lock frame 320 is mutually locked by the lock part 400, thereby fixing the unfolded state of the frame part 300, so that the closed state of the loading part 100 is maintained.

The locking part 400 is configured to be released only by the operation of pulling the unlocking rope 420 to be described later so that the driver (user) pulls the unlocking rope 420 to unlock the locking part 400, ) To be opened.

The central locking device 410 functions to lock the locking frames 320 provided at the front ends of the frame parts 300 to each other. The central locking device 410 includes a rod rod guide 411, a locking hook hinge 412, 413, a locking hook spring hinge 414, a locking hook spring 415, and a locking hook 416.

As shown in the accompanying drawings, the central locking device 410 may be provided in plurality in the longitudinal direction of the locking frame 320.

The rod rod guide 411 is provided at one end of the frame part 300 of the pair of frame parts 300 and has a side opened to provide a space through which the locking hook 416, do.

The locking hook hinge 412 is protruded from the upper surface of the rod rod guide 411 and functions to insert and rotate a hook 413 described later.

The hook 413 is rotatably coupled to the locking hook hinge 412 and is opened to one side and is hooked on a locking hook 416 to be described later so that the pair of locking frames 320 are kept mutually locked .

This hook 413 is formed so that the surface that contacts the locking hook 416 is inclined so that the locking hook 416 can be easily inserted into the space opened to one side of the hook 413 and hooked, As shown in FIG.

The hook 413 is brought into contact with the locking hook 416 which will be described later when the pair of frame parts 300 are slid to be unfolded so that the locking frame 320 contacts each other, The locking hooks 416 are pulled into the openings to one side of the hooks 413 to be engaged.

The locking hook spring hinge 414 is provided on the outer surface of the hook 413, and the locking hook spring 415 described later is fastened.

One side of the locking hook spring 415 is coupled to the other side line end of the rod rod guide 411 and the other side is coupled to the locking hook spring hinge 414. [

The locking hook spring 415 elastically supports the hook 413 so that the hook 413 rotatable about the axis of the locking hook hinge 412 can be rotated in the clockwise direction .

The locking hook 416 is provided at the tip of the other frame part 300 of the pair of frame parts 300 and has a cylindrical shape and is hooked on the hook 413 so that the pair of frame parts 300 ) Make virtual call lock state.

9, when the loading unit 100 is closed, the pair of frame units 300 are slid and unfolded, and the middle of the loading unit 100 is opened. The locking hooks 416 provided on the other locking frame 320 push the inclined surfaces of the hooks 413 provided on the one locking frame 320 so that the locking hooks 416 are locked The hook 413 is rotated in the counterclockwise direction about the hook hinge 412 so that the locking hook 416 is pulled into the space opened to one side of the hook 413 and when the locking frame 320 is completely in contact with each other The hook 413 is again rotated in the clockwise direction by the elastic force of the locking hook spring 415 so that the locking hook 416 is engaged.

Accordingly, the pair of frame parts 300 are locked to each other, so that the loading box 100 is kept closed.

The release rope 420 is coupled to the other end of the hook 413 to release the lock state of the lock portion 400. As shown in the accompanying drawings, The one side of the unlocking rope 420 is coupled to one of the plurality of central locking devices 410 and the other side is formed to protrude to the outside of the loading box 100. [ When the driver (user) pulls the release rope 420, the hook 413 provided in each of the plurality of central locking devices 410 is rotated counterclockwise about the locking hook hinge 412 , The hooking state of the locking hook 416 is canceled, and the locked state is canceled between the frame parts 300.

Thus, when the frame part 300 is unlocked and slidably moved, the frame part 300 is narrowed so that the loading box 100 is in an opened state.

The tent storage unit 500 is provided at the upper and lower ends of the loading unit 100 so that when the loading unit 100 is opened, the pair of frame units 300 are slid and closed, As shown in FIG.

As shown in the accompanying drawings, the tent storage unit 500 may be formed in such a manner that both sides of the tent storage unit 500 are opened, and cover the upper side of the frame unit 300 in the opened state of the loading unit 100.

Accordingly, when the cargo is loaded / unloaded to / from the loading box 100, the tents that can be installed on the outside of the frame unit 300 can be protected from falling of the cargo. When the frame unit 300 is narrowed The tent can be induced to smoothly wrinkle.

10, the upper and lower sides of the frame part 300 are long, and the installation height of the rail part 200 is set to be shorter than the height of the space part 100 of the loading part 100. [ Lt; RTI ID = 0.0 > 110 < / RTI >

Accordingly, it is possible to install a loading box having various forms such as a loading box for loading or unloading cargo into the upper space of the loading box, or a loading box for loading or unloading cargo on the upper side, left side and right side of the loading box.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It can be seen that branch substitution, modification and modification are possible.

100: loader 110:
200: rail part 210: rail supporting part
220: rail 300: frame part
310: Packet frame 320: Lock frame
321: projection 322: groove
330: Bracket 330a: Inner bracket
330b: outer bracket 331: traveling roller
332: steering roller 400: locking part
410: Central locking device 411: Rod rod guide
412: Locking hook hinge 413: Hook
414: Locking hook spring hinge 415: Locking hook spring
416: Locking hook 420: Release rope
500: tent storage unit

Claims

A rail part 200 provided in two rows along the longitudinal direction of the loading box 100 and symmetrically arranged on both sides with respect to the space part 110 of the loading box 100;
A pair of frame parts 300 installed to be slidable on the rail part 200 and symmetrically provided on the front and rear sides in the longitudinal direction of the rail part 200;
And a locking part 400 for locking the pair of frame parts 300 to each other,
The frame part 300 includes:
A plurality of bubble frames 310 having a cross section in a 'C'shape;
A locking frame 320 provided at an end of the frame part 300; And
A driving roller 331 and a steering roller 332 coupled to each other so as to protrude and extend in the bottom direction of each of the cell packing frame 310 and the locking frame 320 and being supported by the rail part 200, And an inner bracket 330a provided on the inner side so as to protrude to the left side of the bubble frame 310 and the lock frame 320 and an inner bracket 330b protruding to the right side of the bubble frame 310 and the lock frame 320 And a bracket (330) including an outer bracket (330b) installed on the outer side of the bracket (330).

The method according to claim 1,
The tent storage unit 500 is disposed on the upper and lower ends of the loading box 100 and is located on the upper side of the frame unit 300 with the loading box 100 opened. Wherein the cover unit is further provided with a cover.

The method according to claim 1,
The rail part (200)
A rail support 210 coupled to the stack 100; And
And a rail 220 fixedly installed on the rail supporting part 210 and having a cross section as a whole,
The driving roller 331 is inserted into the upper space of the rail 220 having the 'Wang' shape and the steering roller 332 is inserted into the lower space of the rail 220 having the ' And a portion protruding to both sides of the rail 220 is supported on the upper side and the lower side.

The method of claim 3,
The rail support portion 210
And the upper side has an inclined surface which is lowered toward the outer side from the middle portion of the loading box (100).

The method according to claim 1,
A protrusion 321 is formed on one side of a lock frame 320 provided at the tip of one of the pair of frame parts 300,
A groove 322 corresponding to the projection 321 is formed on the other side of the lock frame 320 provided at the tip of the other frame 300 of the pair of frame parts 300,
Wherein the protrusion (321) is drawn into the groove (322) when the locking frame (320) is brought into contact with each other.

The method according to claim 1,
The locking part 400
And a central locking device 410,
The central locking device 410
A rod rod guide 411 provided on a lock frame 320 provided at one end of the frame part 300 of the pair of frame parts 300 and having one side opened;
A locking hook hinge 412 protruding from an upper surface of the rod rod guide 411;
A hook 413 rotatably coupled to the locking hook hinge 412 and opened to one side;
A locking hook spring hinge 414 provided on an outer surface of the hook 413;
A locking hook spring 415 having one end coupled to the other end of the rod rod guide 411 and the other end coupled to the locking hook spring hinge 414; And
And a locking hook 416 provided on a locking frame 320 provided at the tip of the other frame part 300 of the pair of frame parts 300,
Wherein the locking hook spring (415) elastically supports the locking hook hinge (412) so that the hook (413) can be rotated clockwise.

The method of claim 6,
The locking part 400
And a release rope 420 coupled to the other side of the hook 413,
When the release rope 420 is pulled, the hook 413 is rotated counterclockwise about the locking hook hinge 412 so that the hooking state of the locking hook 416 is released.

The method of claim 6,
The central locking device 410
Wherein a plurality of the locking frames (320) are provided in the longitudinal direction of the lock frame (320).