KR100942221B1 - Stepless sliding door - Google Patents

Abstract

The present invention relates to a sliding door, and in detail, two door panels share one rail, and withdraw one door panel and slide it toward the open side so that the two door panels can be opened horizontally with each other. Relates to a sliding door.

In order to implement this, the stepless sliding door according to the present invention includes a frame having one rail, a plurality of door panels moving along the rails, sliding members provided in the door panels, and the door panel is closed. And a recess provided in the frame so that the sliding member can stay in a position off the rail when it is pressed.

Description

Stepless Sliding Doors {STEPLESS SLIDING DOOR}

The present invention relates to a sliding door, and in particular, two door panels share one rail, and two sliding members and a relay member for mounting the door panel are provided on each door panel, and a roller provided at the open side relay member is provided. It is located away from the rail, and the roller provided in the closing side relay member also has a curved portion in the rail so that it can be located in the same line as the opening side roller.

The opening side roller is positioned on the rail through the drawing operation of the door panel, and the sliding side moves along the rail through the sliding operation. At this time, the closing side roller passes through the curved portion, and the door panel is opened while keeping the door panel horizontal with the adjacent door panel. To a stepless sliding door.

Among the technologies related to sliding doors that are opened and closed by sliding motion in doors of doors, windows, and various furnitures,

Republic of Korea Patent Publication No. 10-2007-0003482 (2007.01.05, published, 'prior art 1') In the `` sliding door without step using magnetic force ''

Two adjacent doors are positioned on the same plane to form a step between the doors and the doors, and the sliding doors and the closed state can be maintained using a magnet of high magnetic force.

Must be configured according to the magnet attraction and repulsive relationship of the magnet, the technical force is required to minimize the error of the magnetic force, as well as the configuration is very complicated, there is a difficult manufacturing problem.

As another technology, Korean Utility Model Registration No. 20-0374575 (registered on January 20, 2005, referred to as `` advanced technology 2 '') in `` sliding door opening and closing structure ''

In the technique proposed by the same applicant of the prior art 1 by selecting an elastic pressure member instead of a magnet to enable the sliding operation between the two door panels,

The door panel cannot be opened or closed with one hand due to the operation of pushing the elastic pressure member toward the storage space and sliding the adjacent door panel to the empty space.

Since it is necessary to slide the adjacent door panel while pressing the elastic pressing member for one door panel toward the storage space, it is difficult to open and close with little force.

As in the prior art 1, the configuration is very complicated and there is a difficulty in implementing and manufacturing it.

In addition, as another technology, Korean Patent Registration No. 10-0762984 (registered on September 21, 2007, hereinafter referred to as 'prior art 3') `` bathroom cabinet with slide door '' is presented,

The prior art 3 is a guide groove plate installed on the upper and lower plates of the storage cabinet, the rail portion provided to face both sides of the lower guide groove plate installed on the lower plate of the storage cabinet, the slide door guides the lifting and movement by the guide groove plate and the rail portion Is composed of a slider unit is installed, when the door is pushed to one side, the overlapping and open over the stop side door, when pushed back to return to the initial position to close and close the operation is smoothly performed even in a narrow space,

The prior art 3 has a structure in which a slider is seated in each of two guide grooves (corresponding to the rail of the present invention), which is inevitably affecting the front and rear width of the cabinet compared to the structure using one rail,

Also, moving the slider along two guide grooves has a higher rate of interference than running on one rail.

In other words, even if the friction coefficients of the two guide grooves are the same, minute unevenness occurs according to the wear part due to frequent use, and the friction coefficients of the two guide grooves are different, causing interference such as shaking of the door. This will interfere with the slide operation.

In addition, among the two sliders provided in the door, the slider provided at the middle of the door is arranged at a position adjacent to the slider located at the closed side, and in particular, is arranged to be biased from the center of the door to the slider side located at the closed side. Since the opposite side is lifted, there is a problem that the door is not stable and is opened and closed while shaking up and down.

An object of the present invention is to provide a stepless sliding door that allows the sliding member to stay in a position off the rail when the door panel is closed, thereby enabling the sliding opening and closing operation of two door panels sharing one rail.

In addition, the present invention solves the load problem to the door panel through the relay member, to ensure the sliding opening distance while eliminating the sliding motion interference between the two door panel, and also to enable a smooth sliding operation without rattling It is an object to provide a sliding door.

Furthermore, an object of the present invention is to provide a stepless sliding door having a curved portion on the closed side of the rail so that the closed side roller and the open side roller can be positioned in a straight line.

In addition, an object of the present invention is to provide a stepless sliding door which allows the closing side roller to be redirected at an appropriate displacement angle at the curved portion of the rail.

In order to solve the above problems, the stepless sliding door according to the present invention,

A frame in which rails are arranged;

A plurality of door panels moving along the rails;

Sliding members provided in the door panels; And

A recess provided in the frame such that the sliding member stays in a position off the rail when the door panel is closed;

It is made, including.

Here, two adjacent door panels share a rail located in a straight line,

The sliding member is fixed to the door panel through the relay member,

The relay member for supporting the open side sliding member of the relay member

A support arm for allowing the sliding member to stay in the open side and rearward position from the center of gravity of the door panel;

And a concave inlet portion for receiving an open side end portion of an adjacent door panel, and having a connecting arm for fixing the support arm to the door panel.

Moreover, the closed side edge part of the said rail comprises the curved part bent backwards,

The sliding member provided on the closed side of the door panel is a roller, and the roller has a drive shaft for rail direction rotation and a rail vertical direction variable shaft, it is characterized in that the direction can be changed through the variable shaft.

Stepless sliding door according to the present invention,

The biggest effect is to open and close two door panels that share a single rail,

The sliding opening between the two door panels eliminates interference and solves the load problem while ensuring the sliding distance required for opening.

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

1 is a perspective view and enlarged view of the main part of the sliding door according to the present invention, Figure 2 is a plan view and enlarged view of the main part of Figure 1, Figure 3 is an exploded perspective view showing the final sliding member of Figure 1, Figure 4 Figure 1 is an exploded perspective view showing the first sliding member of Figure 1, Figure 5 is a side cross-sectional view showing the displacement coupling means, Figure 6 is a block diagram and enlarged view showing the lower frame, the support, the retractor and the snap means, Figure 7 FIG. 8 is a side cross-sectional view showing a long detachable displacement coupling means, FIG. 9 is a block diagram showing a locking means and a handle in an initial sliding member, and FIGS. 10A to 10E are sliding according to the present invention. FIG. Is a view illustrating a process in which a door panel is pulled out and sliding from a door.

Here, "A" in FIG. 1 is a side view of the frame, "B" in FIG. 2 is an enlarged view of the main parts of the initial sliding member and the fixing means, and "C" in FIG. 2 is an enlarged view of the main part of the final sliding member.

Prior to the description, the front of the door panel is set to the front or the front, based on Figure 1, the storage space, that is, the rear of the door panel is set to the rear or rear.

In addition, the "open side" and "closed side" to be described later mean a direction in which each door panel is opened to open the storage space, and the latter means that each door panel is closed to close the storage space. It means the direction.

As shown in Figures 1 to 6, the stepless sliding door according to the present invention,

It is largely composed of frame, door panel, sliding member and recess.

Looking at each configuration,

The frame 10

Mounting part 11,

A horizontal portion 12 spaced apart from the mounting portion 11;

Two intermediate supports 13 connecting the mounting portion 11 and the horizontal portion 12,

A front support 14 arranged at the front side and connecting the mounting portion 11 and the horizontal portion 12, and

Rear support 15 arranged at the rear side and connecting the mounting portion 11 and the horizontal portion 12

It is made, including.

Here, the mounting portion 11 is further formed with a front portion 111 in which the front end portion is extended upward and the upper end thereof is bent to the rear side, the front portion 111 is the mounting portion when the door panel 20 is opened The components (sliding members, recesses, etc.) mounted on (11) serve to cover the front to prevent exposure.

In addition, the two intermediate supports 13 have a symmetrical shape before and after, respectively, and a recess 131 is formed before and after each.

On the other hand, the rail 16 is mounted on the mounting portion 11 of the frame 10, in connection with the sliding member 30 and the recess 40 to be described later in the mounting relationship of the rail 16 Explain.

remind The door panel 20

A plurality of moving along the rail 16 is provided,

In the present invention, the two are arranged along the single rail 16 through the sliding member 30 and the recess 40 and arranged in the same straight line when closed, and arranged in the same nonlinear line when opened. Become,

In addition, two adjacent door panels 20 share the one rail 16 located in a straight line.

In addition, the door panel 20 may be further provided with a mirror (mirror) in front of the installation site and the nature of use.

remind The sliding member 30

Each door panel 20 is provided, preferably provided in each of the stop and the closed end of each door panel 20, in order to explain them separately, the sliding member 30 provided at the middle end is described below. The first sliding member is referred to collectively, and the sliding member 30 provided at the closed end is collectively referred to as the final sliding member.

The reference numerals of the first sliding member and the final sliding member are 30A and 30B.

The sliding member 30 may be made of a material that is slidable with respect to the rail 16 and may be in the form of applying a lubricant or a rollable form such as a roller to further ensure this.

In the present invention, the sliding member 30 is selected and applied as a roller type, and the present invention is not limited thereto and may be modified and changed in various forms.

The first sliding member 30A

A relay member 31 for staying at an open side and a rearward position away from the center of gravity of the door panel 20, and

Roller 32 is coupled to one end of the relay member 31

It is made, including.

The relay member 31 may include a connection arm 311 fixed to the door panel 20, a support arm 312 to allow the roller 32 to stay at a position deviated from the rail 16. In addition, the connecting arm 311 and the support arm 312 are interconnected to form a 'C' shape made of a concave portion 313 for receiving the open side end of the adjacent door panel 20.

At this time, the roller 32 is coupled to the lower end of the open side of the support arm 312.

The roller 32 has a drive shaft 321, a fixed shaft 322 for connection with the support arm 312, and the bracket 323 is installed with the drive shaft 321 and the fixed shaft 322 Is provided.

And in the present invention, the roller 32 is further provided with a fixing means 70 in order not to run around the fixed shaft 322,

The fixing means 70 is

A locking protrusion 323a provided at an upper end of the bracket 323, and

The support arm 312 of the relay member 31 is composed of a fixing groove (312a) formed to correspond to the locking projection (323a).

Therefore, the roller 32 is coupled to the relay member 31 in a state in which the locking protrusion 323a is seated in the fixing groove 312a of the relay member 31, so that the roller 32 is idle. Will be prevented.

On the other hand, the recess 313 of the relay member 31 is further provided with a cushioning member 313a made of an elastomer (elastomer) material support arm 312 of the first sliding member (30A) provided in the adjacent door panel 20 ) To absorb the end impact.

On the other hand, the relay member 31 in the first sliding member (30A) is preferably installed at both ends of the door panel 20 in consideration of the load of the door panel 20 installed in the hanger type,

Since the relay member 31 of each initial sliding member 30A interferes with each other when the two door panels 20 slide and open and close on the single rail 16.

To solve this interference problem or load problem

In the present invention, when the relay member 31 for the first sliding member 30A is positioned at the center of the door or the open side close to the center of gravity when the center of gravity of the door panel 20, that is, the left and right, the load problem is solved. Resolve,

In addition, by placing the concave portion 313 in the relay member 31 so that the end of the relay member 31 of the adjacent door panel 20, that is, the end of the support arm 312 of the relay member 31 to enter By solving the interference problem and at the same time to ensure the sliding distance for the opening of the door panel 20, an open door panel 20 and the door panel 20 located behind it are mutually open side end and The rear side ends can be located coincident with each other.

The final sliding member 30B

A relay member 36 for staying at a position deviating rearward from the closed side of the door panel 20, and

Roller 37 coupled to one end of the relay member 36

It is made, including.

Here, the relay member 36 is connected to the connection arm 361 fixed to the door panel 20, and the position away from the rail 16, that is, the first sliding member (30A) roller 32 is off It consists of a support arm 362 to allow the roller 37 to be in line with the position to form a 'b' shape.

The roller 37 is provided with a drive shaft 371 for rail direction rotation, a rail vertical direction variable shaft 372, and a bracket 373 in which the drive shaft 371 and the variable shaft 372 are installed. The direction change is possible through the variable shaft 372.

At this time, the variable shaft 372 is positioned on the rail 16 as the roller 32 of the first sliding member 30B is separated from the rail 16 and then pulled out of the door panel 20 for opening. When the door panel 20 is slid in the open direction by an external force, the door panel 20 is slid at an angle first and then has an appropriate displacement angle such that the door panel 20 can be horizontally aligned with the adjacent door panel 20.

To this end, the displacement angle limiting means 80 is further provided in the present invention.

The displacement angle limiting means 80

A locking protrusion 373a provided at an upper end of the bracket 373, and

An angle limiting groove is formed in the support arm 362 of the relay member 36 so as to correspond to the locking protrusion 373a, and the locking protrusion 373a rotates at an appropriate displacement angle with respect to the driving shaft 371. 362a.

On the other hand, referring to Figure 5, there is provided a displacement coupling means (C) for mutual positioning adjustment coupling between the sliding member 30 and the two door panel 20,

The displacement coupling means (C)

Displacement coupling part C1 extending downward to each connecting arm 311 and 361 of the first sliding member 30A and the final sliding member 30B and having a plurality of adjustment holes 311a and 361a,

Displacement accommodating part (C2) formed on the rear side of the upper side of the door panel 20, and

Displacement moving part (C3) is located in the displacement receiving portion (C2) is slidably coupled and has a corresponding control hole (C3-1) for the control hole (311a, 361a)

It is made, including.

When positioning is completed while sliding the displacement moving part C3 located in the displacement receiving part C2 in the open side or closed side direction, it is fastened to the adjustment holes 311a and 361a and the corresponding control hole C3-1. It is fixed by tightening with bolts.

Therefore, the sliding member 30 may be coupled to the door panel 20 after being positioned at an appropriate position. The sliding member 30 may be coupled to the door panel 20 to increase strength of the door panel 20 and the sliding member 30. You can expect

remind The recess 40 is

The roller 32 is provided in the mounting portion 11 of the frame 10 to stay in the position away from the rail 16,

Receiving groove 41 for the roller 32 coupled to the support arm 312 in the relay member 31 of the first sliding member (30A), and

Auxiliary rail 42 for connecting with the rail 16

It is made, including.

Therefore, in the closed door panel 20, the roller 32 is positioned in the receiving groove 41 of the recess 40 (see FIG. 10A top view).

The roller 32 is released from the receiving groove 41 by the front side pulling out operation of the door panel 20 and is positioned on the auxiliary rail 42 (see the top view of FIG. 10B).

The first sliding member 30A of the door panel 20 is moved along the rail 16 by the sliding action of the open side of the door panel 20, and an end of the support arm 312 of the first sliding member 30A is adjacent to the door panel 20. The concave portion 313 is caught and stopped. (See the top view of FIG. 10C to FIG. 10E.)

At this time, the door panel 20 is located on the same line even when the door panel 20 is closed, and when the proper section is passed during the sliding operation, the roller 37 of the final sliding member 30B and the roller 32 of the first sliding member 30A In order to be in the same line

It is preferable that the curved portion 161 bent backward at the closed side end of the rail 16.

The curved portion 171 is formed integrally with the rail 16, or may be formed in a separate auxiliary rail form and connected to the rail 16, in the present invention by selecting the latter (Fig. 2) and FIG. As in 3, the subrail 17 having the curved portion 171 is provided.

On the other hand, in addition to the above-described configuration for the withdrawal and sliding operation of the two door panel 20,

While supporting the lower portion of the two door panel 20 may be provided with components to enable the same operation,

It is possible to simply install the rail of the same type as the path of the rail and the auxiliary rail,

In the present invention, the following configuration is further provided with the lower rail 911 having the same shape as the path of the rail and the auxiliary rail.

A lower frame 91 on which the lower rail 911 is arranged;

Lower rollers 92A and 92B arranged on the lower rail 911 and arranged at positions corresponding to the rollers 32 and 37 of the first and last sliding members 30A and 30B, and

The support 93 is connected to the lower rollers (92A, 92B) and coupled to the lower end of the door panel 20,

In addition, a retractor 94 having a receiving groove 941 is provided so that the lower rollers 92A arranged on the open side of the lower rollers 92A and 92B can be located away from the lower rails 911.

Therefore, when the door panel 20 is drawn out, the roller 32 coupled to the support arm 312 from the relay member 31 of the first sliding member described above is pulled out of the receiving groove 41 of the recess 40. Will be located on the rail 16

At the same time, in the state in which the receiving groove (941) of the retractor (94) of the lower roller (92A) exits the retractor 94 in the withdrawal direction and the roller (92A) is located on the lower rail (911) , (See bottom view in FIGS. 10A and 10B)

Eventually sliding to the open side is possible (see the bottom view of Fig. 10C to Fig. 10E).

On the other hand, the door panel 20 is usually equipped with the upper side first, and the lower side is mounted, when the various types of toilets, washstands, etc. in the bathroom in which the sliding door according to the present invention is to be installed on the upper wall surface When the lower side of the door panel 20 is mounted, interference with a toilet bowl or a wash basin may occur, thereby causing difficulty in mounting.

In order to solve this, in the present invention, the desorption displacement coupling means (D) is provided,

Referring to FIG. 8,

The long detachable displacement coupling means (D)

A lower sliding member D1 having the lower rollers 92A and 92B and having a panel mounting portion D1-1 having a ball catching hole D1-11;

A lower displacement accommodating part D2 formed at a lower end of the door panel 20,

A lower displacement moving part D3 positioned in the lower displacement receiving part D2 and slidably coupled and having an adjustment hole D3-1, and

A lower displacement coupling part D4 having a corresponding adjustment hole D4-1 for the adjustment hole D3-1 of the lower displacement moving part D3 and a long detachable member D4-2;

It is made, including.

Here, the long removable member (D4-2) of the lower displacement coupling portion (D4)

Exposed hole (D4-21),

Balls D4-22 arranged in the exposed holes D4-21, and

It consists of a spring (D4-23) for supporting the end of the ball (D4-22).

The lower displacement moving part (D3) and the lower displacement coupling part (D4) of each of the adjustment holes (D3-1) and the corresponding control holes (D4-1) are fastened with a fastening bolt, the fastening bolt end is the lower displacement receiving portion After the non-contact with (D2) and mutually non-contacting, sliding the lower displacement coupling portion (D4) to the open side or the closed side along the lower displacement receiving portion (D2), when positioning is completed,

The fastening bolt is completely fastened so that the end of the fastening bolt is in close contact with the lower displacement accommodating part D2.

The lower displacement coupling part D4 mounted on the door panel 20 is fitted to the panel mounting part D1-1 of the lower sliding member D1 and partially exposed through the exposure hole D4-21. Since the balls D4-22 are elastically coupled to the ball catching holes D1-11 of the panel mounting part D1-1, mutual mounting is performed.

Therefore, the door panel 20 and the lower sliding member (D1) can be easily attached and detached to improve the workability.

On the other hand, referring to Figure 7, the lower sliding member (D1) is provided with a cushion means (E) in order to prevent the up and down shake when opening and closing the door panel 20,

The cushion means (E) is

It consists of the upper cushion part E1, the upper cushion part E1, and the container E2 accommodated.

The container E2 is mounted on the lower sliding member D1 and supports the lower rail 911 side through the upper cushion part E1, so that the upper and lower sides of the door panel 20 are opened and closed. This prevents shaking.

On the other hand, when the door panel 20 is closed, the door panel 20 is not completely closed by the force generated when the door panel 20 is grasped and pushed to the closed side, which is caused to bounce off, which is generated according to the law of action reaction.

In order to solve this problem in the present invention is provided with snap means (SA, SB),

It is provided on each of the sliding member 30 and the lower sliding member (D1), the sliding member 30 is provided with a snap means (SA) in consideration of the load, the lower sliding member (D1) Snap means (SB) considering the load is provided.

3, the snap means (SA) provided in the sliding member 30 is

Pressing roller (SA1) provided in the final sliding member (D1), And

Connected to the entry part SA2-1, the entry part SA2-1 and connected to the pressurized part SA2-2 having a diameter smaller than that of the pressure roller SA1, and the pressurized part SA2-2. And a seating member SA3-3 in which the pressure roller SA1 is accommodated, and a snap member SA2 provided on the subrail 17.

It is made, including.

Here, the snap member SA2 is preferably made of a material having elasticity.

Therefore, when the door panel 20 is closed, the pressure roller SA1 presses the pressurized part SA2-2 past the entrance part SA2-1 of the snap member SA2, and then the seating part ( SA3-3) is stably entered and positioned,

At this time, the force to move to the open side by the repulsive force is canceled by the pressurized portion (SA-2), it is possible to completely close the door panel 20.

And, referring to Figure 6, the snap means (SB) provided in the lower sliding member (D1)

Two pressing parts (SB1) spaced apart at intervals smaller than the diameter of the lower roller (92B) on both sides with the closed side end of the lower rail (911) between, and

Springs SB2 supporting the rear ends of the two pressing portions SB1

It is made, including.

Therefore, when the door panel 20 is closed, the lower roller 92B enters the lower rail 911 between the two pressing parts SB1, and the two pressing parts SB1 are opened to both sides. The lower roller 92B is seated past the two pressurized portions SB1, and the two pressurized portions SB1 are fixed to the lower roller 92B while being returned to the original state by the spring SB2.

As a result, through the two snap means (SA, SB) it is possible to induce a complete closing of the door panel 20 stably.

On the other hand, the sliding door according to the present invention may be provided with a position adjusting means (not shown) to adjust the up, down, left and right positions of the door panel 20.

And the frame 10 is provided with a locking member (L) on the same non-linear line with the rail (16),

In this case, when the two door panels 20 are pulled out simultaneously at the same time, an error occurs due to the locking member L,

Since the operation of opening or closing the two door panels 20 is not made,

In order to eliminate this, the recess 40 is provided with a locking release knob H, and the handle H is preferably provided in a form that can be easily manipulated from the outside.

In the above description of the present invention with reference to the accompanying drawings, a description has been made mainly on the "stepless sliding door" having a specific shape and structure, the present invention can be variously modified and changed by those skilled in the art, such modifications and changes It should be interpreted as falling within the protection scope of the invention.

1 is a perspective view and an enlarged view showing a sliding door according to the present invention,

2 is a plan view and a main portion enlarged view of FIG.

3 is an exploded perspective view showing the final sliding member of Figure 1,

Figure 4 is an exploded perspective view showing the first sliding member of Figure 1,

Figure 5 is a side cross-sectional view showing a displacement coupling means;

Figure 6 is a schematic view showing the lower frame, the support, the retractor and the snap means and enlarged parts,

7 is a configuration diagram showing a lower sliding member,

Figure 8 is a side cross-sectional view showing the demountable displacement coupling means;

9 is a block diagram showing the locking means and the handle in the first sliding member,

10a to 10e is a view showing a process in which the door panel is drawn out sliding in the sliding door according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: frame

11: mounting portion 111: front portion

12: horizontal part 13: intermediate support

131: trimming part 14: front support

15: rear support 16: rail

161: curved portion 17: subrail

20: door panel

30: sliding member

30A: First sliding member

31: relay member 311: connecting arm

311a: adjusting hole 312: support arm

312a: fixing groove 313: recessed part

313a: buffer member 32: roller

321: drive shaft 322: fixed shaft

323: bracket 323a: locking projection

30B: final sliding member

36: relay member 361: connecting arm

361a: adjusting hole 362: support arm

362a: angle limit groove 37: roller

371: drive shaft 372: variable shaft

373 Bracket 373a

40: recess

41: receiving groove 42: auxiliary rail

70: fixing means

80: displacement angle limiting means

91: lower frame

911: lower rail

92A, 92B: Lower Roller

93: support

94: progressive body

941: Acceptance Home

C: displacement coupling means

C1: displacement coupling part C2: displacement receiving part

C3: Displacement moving part C3-1: Countermeasure control hole

D: Longitudinal desorption coupling means

D1: Lower sliding member D1-1: Panel mounting part

D1-11: Ball catching ball D2: Lower displacement receiving part

D3: Lower displacement moving part D3-1: Adjustment hole

D4: Lower displacement coupling part D4-1: Countermeasure control hole

D4-2: Long detachable member D4-21: Exposed hole

D4-22: Ball D4-23: Spring

E: cushion means

E1: upper cushion portion E2: receptor

SA, SB: Snap means

SA1: Pressure roller SA2: Snap member

SA2-1: Entry part SA2-2: Pressed part

SA2-3: Seating part

SB1: Pressing part SB2: Spring

L: Locking member

H: Locking release knob

Claims (4)

A frame in which rails are arranged; A plurality of door panels moving along the rails; Sliding members provided in the door panels; And And a recess provided in the frame such that the sliding member stays in a position off the rail when the door panel is closed. Two adjacent door panels share a rail located in a straight line, The sliding member is fixed to the door panel through the relay member, The relay member for supporting the open side sliding member of the relay member A support arm for allowing the sliding member to stay in the open side and rearward position from the center of gravity of the door panel; And a concave inlet portion for receiving an open side end portion of an adjacent door panel and having a connecting arm for fixing the support arm to the door panel. delete The method of claim 1, The closed side end of the rail is a stepless sliding door, characterized in that forming a curved back. The method of claim 3, wherein The sliding member provided on the closed side of the door panel is a roller, The roller has a drive shaft for rail direction rotation and a rail vertical direction shaft, Stepless sliding door characterized in that the direction can be changed through the variable shaft.

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