JP2002227507A - Double sliding door unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a double sliding door unit in which two door plates are shifted from the closing state for butting each other in the same vertical plane to the opening state for superposing one on the other inside and outside. SOLUTION: This double sliding door device is provided with a first door 1 laterally moving along an inside moving path, a second door 2 hung on a lateral mover 10 through a parallel link mechanism 9 formed to parallelly move between the inside of the inside moving path and the inside of an outside moving path, and urged to the inside moving path side, and a cam means 60 for moving the second door 2 in parallel to the inside of the outside moving path. Traversing bodies 6, 13 engaged with one lower guide rail 58 for oscillatory stop are provided on the lower parts of both doors 1, 2 so that both doors 1, 2 are allowed to superpose one on the other inside and outside. The traversing body 13 for steady brace at the lower part of the second door 2 is connected to the door 2 through a link 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door device used to open and close openings of stationary furniture, built-in storage, and the like.

[0002]

2. Description of the Related Art As this kind of sliding door device, for example, as described in Japanese Patent No. 3080349,
When the opening is closed, the two doors abut each other to form a continuous plane, and when one of the two doors is opened to open the opening, one of the two doors is opened. There is known a sliding door device in which the doors move in parallel to the outside of the other door so that the two doors overlap each other inside and outside.

A sliding door apparatus of this type is composed of a first door suspended on an upper guide rail for support and laterally moving along an inner moving path, and a parallel link mechanism for a laterally moving body engaged with the upper guide rail for support. And is configured to be able to translate between the inside movement path and the outside movement path outside the inside movement path, and is urged toward the inside movement path side by a spring. The second door and the cam means for moving the second door into the outer movement path when the two doors relatively move from the closed state in which the two doors abut each other in the inner movement path are the two doors. A lower guide rail for steadying and a run-out engaging with the guide rail in order to prevent the lower end of each door from swinging inward and outward at right angles to the direction of movement of the door. A horizontal moving body for stopping is installed It has been.

[0004]

However, in the conventional sliding door device described in the above publication, the anti-sway horizontal member is attached to both ends of the lower ends of the two doors in the moving direction, The two lower guide rails for steadying are arranged in two stages above and below the front edge of the floor plate of the opening that is opened and closed by the sliding door device so as to correspond to each door. Not only is the cost of the steady rest means high, but also the height of the floor plate at the opening which is opened and closed by the sliding door device is increased, and the storage efficiency is reduced.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sliding door apparatus which can solve the above-mentioned conventional problems. The first door 1 suspended from the upper supporting guide rail 50 and laterally moving along the inner movement path, and the laterally moving body 1 engaged with the upper supporting guide rail 51 are denoted by reference numerals.
0 through a parallel link mechanism 9 so as to be able to translate between the inside movement path and the outside movement path outside the inside movement path.
A second door 2 urged toward the inner moving path side by
When the two doors 1 and 2 relatively move from the closed state where they abut each other in the inside moving path, the cam means 60 for moving the second door 2 in parallel into the outside moving path is provided by the cam means 60. , 2 a sliding door device provided at the butting ends 1 a, 2 a, wherein one lower guide rail 58 for steadying is laid, and the swinging device is provided at the lower part of both doors 1, 2. The anti-sway horizontal members 6, 13 which are engaged with the lower guide rails 58 for stop are provided at positions where the doors 1, 2 are allowed to overlap each other in and out, and are used for anti-sway at the lower part of the second door 2. The horizontal moving body 13 is provided with the links 40 and 41 of the parallel link mechanism 9.
It is configured to be connected to the door 2 via a link 12 parallel to the door 2.

In implementing the apparatus of the present invention having the above-mentioned structure, the anti-swaying horizontal members 6, 13 can be arranged one by one near the center of each of the doors 1, 2.

[0007] The lower guide rail 58 for steadying is provided with a groove-shaped rail portion 59 which is open to the lower side, and is attached to the lower side of the front edge of the floor plate 57 of the opening 3 which is opened and closed by the sliding door device. The anti-sway horizontal members 6 and 13 are provided with a groove-shaped rail portion 59 of the anti-sway lower guide rail 58.
Can be constituted by one vertical axis roller 25, 48 which fits into the roller.

The supporting upper guide rail 50 for suspending the first door 1 is provided outside the supporting upper guide rail 51 in which the laterally moving body 10 for suspending the second door 2 is fitted. It can be integrally connected so as to be located between 51 and the first door 1.

The first door 1 has a support for hanging the first door 1 at a position in the vicinity of the horizontal shaft roller 17 fitted to the support upper guide rail 50 for hanging the first door 1. The upper guide rail 50 may be provided with a vertical shaft roller 18 that abuts a vertical rail surface 56 formed parallel to the inner moving path.

The supporting upper guide rail 51 into which the laterally moving body 10 for suspending the second door 2 is fitted has an upper grooved rail portion 52 that is open on the lower side, and an upper opening rail that is opened immediately below the upper grooved rail portion 52. And the lower grooved rail portion 53 and the rear side wall plate portion 54.
The horizontal moving body 10 is provided with the upper and lower grooved rails 52 and 53 at both ends in the moving direction.
A pair of upper and lower concentric vertical shaft rollers 37 and 38
And a horizontal shaft roller 39 fitted to the lower grooved rail portion 53, and the parallel link mechanism 9 for connecting the horizontal moving body 10 and the door 2 is provided with a vertical link at both ends of the horizontal moving body 10. It can be constituted by a pair of horizontal swing links 40, 41 in the movement direction, one end of which is supported by the support shaft 36 of the shaft rollers 37, 38.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 3, reference numeral 1 denotes a first door, 2 denotes a second door, and 3 denotes both doors. An opening that is opened and closed by a door. The first door 1 has hanging roller units 4 at positions near both ends in the door movement direction inside the upper end thereof.
5 is attached, and an anti-sway horizontal member 6 is attached near the center of the door moving direction inside the lower end. Second door 2
A horizontal moving body 10 is attached to the inside of the upper end via a pair of bearing units 7, 8 and a parallel link mechanism 9 in the door moving direction, and a bearing unit 11 and a link 12 are provided near the center of the door moving direction inside the lower end. Moving body 1 for steadying through
3 is attached.

The hanging roller units 4 and 5 of the first door 1 have the same structure, and are provided on the back side of the door 1.
A casing 14 buried flush with the upper end of the casing 14, a movable body 15 fitted inside the casing 14 so as to be able to move up and down as shown in FIG.
A supporting horizontal axis roller 17 pivotally supported by the movable body 15 so that the entire roller protrudes from the rear side of the door 1;
The vertical axis roller 18 supported by the movable body 15 so that a part of the roller projects to the rear side of the door 1 near the upper end of the door 1
It is composed of The vertical position adjusting means 16 includes:
It comprises a screw shaft 19 having an upper end fixed to the movable body 15 and a rotary operation tool (nut) 20 that is screwed onto the screw shaft 19.

The anti-swaying horizontal member 6 of the first door 1 is composed of one flanged vertical shaft roller 25. The means for supporting the flanged vertical shaft roller 25 is provided on a casing 21 buried on the back side of the door 1 and flush with the lower end of the door 1.
5, a movable body 23 fitted inside the casing 21 so as to be able to move up and down and urged in the ascending direction by a spring 22, and attached to the movable body 23 and below the lower end of the door 1. , And a bearing member 24 extending horizontally inward, and the flanged vertical shaft roller 25 is pivotally supported on the top end of the bearing member 24.

The bearing units 7 and 8 of the second door 2 have a casing 26 buried on the back side of the door 2 and flush with the upper end of the door 2 and, as shown in FIG. A vertical shaft 28 supported by the bearing member 27 so as to be able to move up and down so that the upper end protrudes from the upper end of the door 2, a vertical position adjusting means 29 for the vertical shaft 28, and A vertical shaft roller 30 is supported by the casing 26 so that a part of the roller projects toward the rear side. The vertical position adjusting means 29 includes a vertical axis 28.
, And a rotary operating tool (nut) 31 screwed into the screw shaft portion 28a.

The horizontal moving body 10 of the second door 2 is shown in FIGS.
As shown in FIG.
2 and 33, and a belt-like plate 34 connecting the two roller units 32 and 33.
Is a pair of upper and lower vertical shaft rollers 37 and 38 supported on the upper and lower ends of a single vertical shaft 36 penetrating the bearing member 35, and a part of the roller below the bearing member 35. The supporting horizontal shaft roller 39 is supported by the bearing member 35 so as to protrude therefrom. Note that the upper vertical shaft roller 37 is
The entire roller protrudes upward from the upper end of the shaft member, and the lower vertical shaft roller 38 is loosely fitted in a notch recess formed at the lower end of the bearing member 35.

The parallel link mechanism 9 of the second door 2 is constituted by a pair of mutually parallel links 40 and 41 connecting the roller units 32 and 33 at both ends of the horizontal moving body 10 and the pair of bearing units 7 and 8. ing. The outer ends of the links 40, 41 are supported on the upper ends of the vertical shafts 28 of the bearing units 7, 8, and the inner ends of the links 40, 41 are
A vertical shaft 36 of each of the roller units 32 and 33 is supported between a vertical shaft roller 37 at the upper end thereof and an upper end of the bearing member 35. As shown in FIG. 6, a torsion coil spring 42 for urging the links 40, 41 between the links 40, 41 and the bearing member 35 so that the laterally moving body 10 and the door 2 approach each other. Are inserted in a state of being loosely fitted to the vertical shaft 36.

The bearing unit 11 of the second door 2 is
A casing 43 buried flush with the lower end of the door 1 on the back side of the door 1 and a bearing member 44 fitted inside the casing 43 so as to be able to move up and down and ascend and descend by a spring 45 as shown in FIG. And a vertical shaft roller 4 supported by a casing 43 so that a part of the roller protrudes toward the rear side of the door 2 near the lower end of the door 2.
7 is comprised. The link 12 has the same effective length as the respective links 40 and 41 of the parallel link mechanism 9 and is inclined in the same direction. One end is attached to the lower end of the vertical shaft 46 and the lower end of the door 2 Extends horizontally inward at the bottom. And the steadying horizontal member 13
Is constituted by a flanged vertical shaft roller 48 supported on the upper end of the link 12. The flanged vertical shaft roller 48 and the oscillating horizontal moving member 6 of the first door 1
Is the same as the flanged vertical shaft roller 25.

As shown in FIG. 5, a top plate 49 of the opening 3 that is opened and closed by the first door 1 and the second door 2 is disposed so as to cover the upper sides of the two doors 1 and 2, Upper guide rail 50 for suspending the first door 1 and upper guide rail for suspending the second door 2 so as to be positioned inside the first door 1 below the top plate 49. 51 are attached. The upper supporting guide rails 50 for suspending the first door 1 are integrally connected to the outer side of the supporting upper guide rail 51 for suspending the second door. . Thus, the supporting upper guide rail 51 for suspending the second door 2 includes an upper grooved rail portion 52 that is open on the lower side, and a lower grooved rail that is open immediately below the upper grooved rail portion 52. And an upper channel-shaped rail portion 52.
The support upper guide rail 50 for suspending the first door 1 is mounted in a state buried in the top plate 49, and a horizontal rail protruding outwardly flush with the lower end of the lower grooved rail portion 53. And a vertical rail surface 56 disposed above the horizontal rail portion 55 substantially flush with the outer edge of the horizontal rail portion 55.

As shown in FIG. 5, the floor plate 57 of the opening 3 is erected such that the bottom surface thereof is located at substantially the same level as the lower ends of the first door 1 and the second door 2. Floorboard 5
A lower guide rail 58 for steadying is buried in the bottom surface near the front edge of 7. The lower guide rail 58 for steadying is provided with a groove-shaped rail portion 59 that is open on the lower side.

As shown in FIG. 5, the first door 1 is mounted on a horizontal rail portion 55 of the upper guide rail 50 by supporting the horizontal shaft rollers 17 of the hanging roller units 4 and 5. At the same time, the vertical shaft roller 25 with a flange of the horizontal member 6 for steadying movement of the door 1 is fitted to the groove-shaped rail portion 59 of the lower guide rail 58 for steadying, so that the door 1 itself is moved. It is suspended so as to be able to reciprocate while maintaining a vertical posture along a linear inner moving path including the moving object.

The vertical axis rollers 18 of the suspension roller units 4 and 5 are connected to the support upper guide rail 5.
When the second door 2 overlaps the outside of the first door 1 and is pushed inward from the second door 2 as described later, the vertical axis roller The first door 1 can be moved smoothly even in such a state because the roller 18 can roll by contacting the vertical rail surface 56.
Also, even if there is some variation in the spacing between the horizontal rail portion 55 of the upper guide rail 50 for support and the lower guide rail 58 for steadying, the flanged vertical shaft roller 25 of the horizontal member 6 for steadying can be used. Since it can move up and down with the movable body 23 in a pair, and is urged upward by the urging force of the spring 23,
The flange of the roller 25 abuts the shoulders on both sides of the grooved rail portion 59 to maintain a state in which the roller 25 is always fitted to the grooved rail portion 59 at a constant depth. , Does not come into sliding contact with the bottom surface of the grooved rail portion 59.

As shown in FIG. 6, a pair of upper and lower vertical shaft rollers 37 and 38 of the roller units 32 and 33 at both ends of the horizontal moving body 10 of the second door 2 are formed by upper and lower members of the upper guide rail 51 for support. The horizontal shaft rollers 39 for supporting the roller units 32 and 33 are mounted on the bottom surface of the lower grooved rail portion 53 while being fitted to the grooved rail portions 52 and 53, and are used to prevent the door 2 from oscillating. The vertical shaft roller 48 with the flange of the horizontal moving body 13 is fitted to the groove-shaped rail portion 59 of the lower guide rail 58 for steadying, so that the first door 1 moves vertically along the inner movement path. And can be suspended back and forth.

Thus, the second door 2 suspended as described above is accompanied by a parallel horizontal swinging motion of the links 40 and 41 of the parallel link mechanism 9 and the link 12 supporting the horizontal member 13 for steadying. And the horizontal body 10 and the horizontal body 1 for steadying
3 can be moved inward and outward, and is urged inward by the spring 42 for urging the links 40 and 41 of the parallel link mechanism 9 with respect to the laterally moving body 10. As described above, when the second door 2 is located at a position that does not overlap with the first door 1, the second door 2 is moved by the urging force of the spring 42 into an inner movement path in which the first door 1 moves. And is in a state of abutting against the first door 1. At this time, as shown in FIG. 6, the vertical shaft rollers 30 of the pair of bearing units 7 and 8 on the upper side of the second door 2 are connected to the vertical rail surface 56 of the supporting upper guide rail 50 for suspending the first door 1. And the vertical shaft roller 47 of the lower bearing unit 11 abuts on the front end face 57a of the floor plate 57, so that the second door 2 is located within the inner movement path in which the first door 1 moves. Accurate positioning. Of course, link 4
A stopper that regulates the swing range of 0, 41, and 12 may be provided so as to position the second door 2.

As described above, when the first and second doors 1 and 2 are in the same inner movement path and are in the closed position where they abut each other, as shown in FIG. The doors 1 and 2 are closed. Although not shown, the movement of the first door 1 in the direction away from the second door 2 from the closed state of the opening shown in FIG.
And a stopper that abuts against the bearing member 35 of the horizontal door 10 to prevent the horizontal moving body 10 of the second door 2 from moving away from the first door 1. It is attached.

As shown in FIG. 1, a cam means is provided at the abutting ends 1a and 2a of the doors 1 and 2 which abut each other when the doors 1 and 2 are closed. 60 are provided. That is, the butting end 2a of the second door 2
Are overlapped on the outside of the butting end 1a of the first door 1, the butting ends 1a and 2a of the two doors 1 and 2 are formed in a wedge-shaped cross section, and the bearing unit 7 of the second door 2 is The vertical shaft roller 30 is also configured to protrude toward the butting end 2 a of the second door 2, and the cam means 60 is formed by the wedge-shaped butting end 1 a of the first door 1 and the vertical roller 30. It is configured. Thus, the first door 1 is moved to the second door 2 from the state shown in FIG. 1 in which the two doors 1 and 2 are in the closed position, or the second door 2 is moved to the first door 1. When moved in the direction, the wedge-shaped butting end 2a of the second door 2 rides on the wedge-shaped butting end 1a of the first door 1 via the vertical shaft roller 30 of the bearing unit 7, The second door 2 is connected to the parallel link mechanism 9 against the urging force of the spring 42.
And, it is configured to move outward in parallel with the swing of the link 12.

Accordingly, in FIG. 1 where both doors 1 and 2 are in the closed position.
When the first door 1 is moved toward the second door 2 from the state shown in FIG. 2, the first door 1 pushes the second door 2 outward, and the first door 1 When the second door 2 is moved toward the first door 1, the second door 2 is moved to the first door 1. In the state where the first door 1 is moved in parallel so as to ride on the outside of the first door 1, the outer door moves along the outer movement path parallel to the inner movement path in which the first door 1 moves. At this time, as shown in FIG. 7, the inward return force of the second door 2 due to the urging force of the spring 42 is applied to each of the bearing units 7, 8, 1
The first door 1 is received by the first vertical shaft rollers 30 and 47 abutting on the upper and lower end surfaces of the first door 1, and acts on the first door 1.
The inward pressing force from the vertical axis roller 18 of each of the hanging roller units 4 and 5 abuts on the vertical rail surface 56 of the upper guide rail 50 for support, and the vertical axis with a flange of the horizontal member 6 for steadying. Since the roller 25 is fitted on the lower guide rail 58 for steadying, the roller 25 is received on the top plate 49 and the floor plate 57 side, and the first door 1 and the second door 2
Can be smoothly moved.

As described above, the opening 3 can be opened by moving the first door 1 so as to overlap the inside of the second door 2 or the second door 2 so as to overlap the outside of the first door 1. However, at this time, as shown in FIG. 3B, the horizontal members 6, 13 of the doors 1, 2 engaging with the common lower guide rail 58 for the anti-sway interfere with each other, and the doors 1, 2, In order not to prevent the relative movement of the doors 2 to a position where they completely overlap, the anti-sway horizontal members 6 and 1 are provided near the center of the doors 1 and 2 in the moving direction.
3 are provided. In this embodiment, the anti-sway horizontal members 6 and 13 are arranged one by one near the center in the moving direction of the doors 1 and 2, respectively. For example, the butting ends 1a and 2a of the doors 1 and 2 are arranged. In the region between the rear end and the vicinity of the center on the opposite side, a plurality of steady rests can be arranged side by side in the moving direction.

When the second door 2 is moved, the flanged vertical shaft roller 48 of the anti-sway horizontal member 13 is also moved by the vertical shaft 4.
6 can be moved up and down in pairs, and are urged upward by the urging force of the spring 45, so that the flange of the roller 48 comes into contact with the shoulders on both sides of the grooved rail portion 59, so that the grooved rail portion is always provided. Since the state in which the lower guide rail 59 is fitted to the fixed depth 59 is maintained, even if there is some variation in the interval between the lower groove rail 53 of the support upper guide rail 51 and the lower guide rail 58 for steadying, The flanged vertical shaft roller 48 does not come off the grooved rail portion 59 or slide on the bottom surface of the grooved rail portion 59.

The configuration of the present invention is not limited to the above embodiment. For example, a spring that urges the second door 2 toward the movement path of the first door 1, that is, the inner movement path side, is also interposed between the link 12 of the horizontal member 13 for steadying movement and the bearing unit 11. It is also possible to use not only a torsion coil spring but also a tension coil spring or a leaf spring. In addition, various modifications as described in Japanese Patent No. 3080349 can be employed.

[0030]

The sliding door device according to the present invention can be implemented and used as described above. According to the sliding door device according to the present invention, one lower door for steadying is used. Since the guide rails guide the steady-state moving body of the first door to the steady-state moving body of the second door, a dedicated steady-state lower guide rail is provided for each door. Compared with the case, not only can the cost of the steadying means at the lower end of the door as a whole apparatus be significantly reduced, but also the floor plate height of the opening which is opened and closed by the sliding door apparatus can be reduced. And storage efficiency can be improved.

According to the second aspect of the present invention, it is sufficient to dispose one anti-sway horizontal member for each of the doors. The steadying effect of each door can be enhanced as compared with a case where a steady rest is provided at the rear end opposite to the end.

According to the third aspect of the present invention, one lower rail for steadying is concealed and protected by the floor plate of the opening which is opened and closed by the sliding door device.
Since the guide rail is provided with a groove-shaped rail portion that is open at the lower side, there is no possibility that the guide rail may be damaged by contact with an article to be taken in and out of the opening, and dust and the like may be contained in the guide rail. There is no danger that the doors will accumulate and hinder smooth movement of the door.

Further, according to the structure of the fourth aspect, the upper support rail for suspending the first door and the upper guide rail for suspension suspending the second door are connected in two vertical stages. The rate at which the height of the opening is reduced by the guide rail is smaller than in the case where the guide rail is used, so that articles can be easily taken in and out.

According to the fifth aspect of the present invention, the first door is suspended in comparison with the case where the vertical shaft roller is internally fitted to the upper support rail for suspending the first door. The structure of the supporting upper guide rail for hanging the door is simplified. Moreover, when the second door overlaps the outside of the first door, an inward pressing force received from the second door is used to suspend the first door via the vertical axis roller. Therefore, it is possible to easily perform the push-in movement of the first door into the inside of the second door and the integral movement of both doors in a state where they are overlapped with each other.

Further, according to the structure of the sixth aspect, the horizontal moving member for suspending the second door can be completely installed in the guide rail, and the horizontal moving member can be smoothly slid. I can do it. Further, since the vertical support shaft for supporting the vertical shaft roller of the horizontal moving member is also used as the support shaft of the horizontal swing link of the parallel link mechanism, the number of parts is reduced and the cost can be reduced.

[Brief description of the drawings]

FIG. 1A is a plan view in which a guide rail is omitted in a state in which an opening is closed, and FIG.

FIG. 2 is a front view in which a guide rail and a door itself are omitted in a state where an opening is closed.

FIG. 3A is a plan view in which a guide rail is omitted with an opening portion opened, and FIG. 3B is a cross-sectional plan view of the same.

FIG. 4 is a front view showing a part of a horizontal moving body and a parallel link mechanism of a second door.

FIG. 5 is a partially cutaway longitudinal side view showing a first door and a support structure thereof.

FIG. 6 is a partially cutaway longitudinal side view showing a second door and a support structure thereof.

FIG. 7 is a partially cut-away longitudinal side view showing each door and a support structure thereof in a state where a first door and a second door overlap inside and outside.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 first door 1a wedge-shaped butting end of first door (cam means) 2 second door 2a wedge-shaped butting end of second door 3 opening 4,5 hanging roller unit 6 steady Horizontal moving body 7, 8 Bearing unit 9 Parallel link mechanism 10 Horizontal moving body 11 Bearing unit 12 Link 13 Steady horizontal moving body 16 Vertical position adjusting means 17 Supporting horizontal axis roller 18 Vertical axis roller 25 Vertical axis roller with flange 29 Vertical position Adjusting means 30 Vertical axis roller (cam means) 32, 33 Roller unit 34 Strip plate 36 Vertical axis 37, 38 Vertical axis roller 39 Supporting horizontal axis roller 40, 41 Link 42 Torsion coil spring 47 Vertical axis roller 48 Vertical with flange Axial roller 49 Top plate 50 Upper guide rail for supporting first door 51 Upper guide for supporting second door Rail 52 Upper-side grooved rail part opened downward 53 Lower-side grooved rail part 54 opened upper side Rear wall part 55 Horizontal rail part 56 Vertical rail surface 57 Floor plate 58 Lower guide rail for steady rest 59 Lower-opened grooved form Rail part 60 Cam means

Claims (6)

[Claims] 1. A first door which is suspended by an upper guide rail for support and traverses an inner movement path, and is suspended by a horizontal moving member which engages with the upper guide rail for support via a parallel link mechanism. A second door urged toward the inner movement path side by a spring while being configured to be able to move in parallel between the inside movement path and an outer movement path outside the inner movement path; When the doors relatively move from a closed state in which they abut each other in the inner moving path, a cam means for moving the second door in parallel into the outer moving path is provided at the abutting end of the two doors. A sliding door device is provided, wherein one lower anti-sway lower guide rail is laid, and at the lower part of both doors, there is a horizontal anti-sway member that engages with the lower anti-sway guide rail. , In a position that allows both doors to overlap each other inside and outside Vignetting, the lower portion of the anti-vibration lateral motion of the second door, the is connected to the door via a link parallel link of the parallel link mechanism, pulling difference door device. 2. The sliding door apparatus according to claim 1, wherein the horizontal members for steadying are provided one by one near the center of each of the two doors. 3. The swing-stop lower guide rail is provided with a groove-shaped rail portion which is attached to a lower side of a front edge portion of a floor plate of an opening which is opened and closed by the sliding door device and is open to the lower side. The sliding door device according to claim 1, wherein the stopper horizontal moving body includes one vertical axis roller fitted into the groove-shaped rail portion of the steady-state lower guide rail. 4. A supporting upper guide rail for suspending the first door, the supporting upper guide rail and the first upper guiding rail being outside the supporting upper guide rail in which the horizontally moving body suspending the second door is fitted. The sliding door device according to any one of claims 1 to 3, which is integrally and continuously provided so as to be located between the sliding door device and the door. 5. A supporting upper guide rail for suspending the first door at a position near a horizontal shaft roller fitted to the supporting upper guide rail for suspending the first door. The sliding door device according to any one of claims 1 to 4, further comprising a vertical axis roller abutting on a vertical rail surface formed parallel to the inner moving path. 6. An upper guide rail for support in which a laterally movable body for suspending the second door is internally fitted, comprising an upper grooved rail portion that is open on the lower side, and a lower groove that is open just above the upper grooved rail portion. And a pair of upper and lower concentric vertical shafts fitted to the upper and lower grooved rail portions at both ends in the moving direction of the laterally moving body. A roller and a horizontal shaft roller fitted to the lower channel rail portion are supported by a shaft, and the parallel link mechanism that connects the horizontal moving body and the door is a support shaft of a vertical shaft roller at both ends of the horizontal moving body. The sliding door device according to any one of claims 1 to 5, wherein the sliding door device is constituted by a pair of horizontal swing links having one end supported in the movement direction.