WO2013039326A1 - Interlocking device for a triple sliding door - Google Patents

Abstract

The present invention relates to an interlocking device for a triple sliding door. The interlocking device includes: an upper rail fixedly installed on an upper portion of a door frame; a slide fitted into a first guide part of the upper rail, disposed movably along the first guide part, and having a through hole for fixedly coupling an intermediate door in one side thereof; a belt rotatably disposed between a pair of pulleys disposed on an upper portion of the slide; a first interlocking ball for moving the intermediate door and a front door relative to each other when the belt is moved; and a second interlocking ball for moving the intermediate door and a rear door relative to each other when the belt is moved. When each of the intermediate door, the front door, and the rear door are moved in a length direction of the upper rail, a looseness tolerance while each of the doors is moved along the upper rail may be minimized to stably maintain the movement of each of the doors and maximally prevent noise from occurring.

Description

Interlocking device of triple interlocking door

The present invention relates to a linkage of a triple interlocking door, and more particularly, to a linkage of a triple linkage door that can prevent the generation of noise by allowing the three doors to move stably and smoothly on the upper rail.

In general, when a plurality of doors are installed in a sliding manner, an interlocking triple sliding door that opens and closes one door to open and close another door in a desired direction has an advantage that a door can be used more widely than a conventional two door system. It is widely used in recent years.

As a technology of the triple interlocking door related to this, Korean Patent Registration No. 10-0724592, "opening and closing body interlocking device" has been proposed.

According to the prior art, the guide rail installed in the door interlock device is slid through the sliding groove formed by the first coupling part of the upper rail, which guides each time the door is opened and closed. There is a problem that noise occurs due to friction movement of the rail in the sliding groove.

In addition, the prior art is installed so that the engaging groove of each of the carrier body through the engaging piece formed in the longitudinal direction "L" shape on both sides of the substrate portion of the door interlock device and the door interlock device is installed in the second door body The transfer body is connected to the pivot shafts of the intermediate door body and the rear door body through the sliding hole to open and close the door body so that the engaging grooves of the respective carrier bodies slide through the engaging pieces in the door interlock device. When the sliding door is opened and closed repeatedly, frictional wear occurs, and the door linkage is slightly twisted in the middle door, the front door, and the rear door. When the furnace assembly is made, the coupling groove of the carrier is not slipped smoothly at the coupling piece. There is a problem that can generate noise together.

In addition, in the above prior art, since empty spaces are formed in the upper portion of the door body, outside wind flows through the upper end portion of the door body through these empty spaces, and thus, a problem in that windproof and soundproofing are not properly performed.

On the other hand, the interlock device of the sliding door of Patent No. 10-0880272 discloses a structure in which the guide rollers installed on the upper portions of the first, second and third doors are slidably opened and closed while being guided by the recesses of the upper rail.

However, the above prior art has a disadvantage in that it is difficult to attach or detach the sliding door to the door frame during the construction process or to be removed by the consumer, and the upper part is formed with an empty space to prevent wind and sound insulation.

In addition, the sliding sliding interlock of the Patent Publication No. 10-2003-64003 is mounted to slide on the lower surface of the door frame can be overlapping or unfolding the first interlocking door, the middle door and the second interlocking door; A pair of rotors fixed to the upper surface of the intermediate door to be rotatable; A rotating belt mounted to the rotating body; A pair of sleeves respectively formed upward from one side of the first interlocking door and the other side of the second interlocking door; And a pair of fasteners fixed to both sides of the rotating belt which rotate in opposite directions and fixed to the sleeve, respectively.

However, in the above prior art, it is necessary to fix the slab to the first interlocking door and the second interlocking door and to connect the fixture to the slab in order to interlock the first interlocking door, the middle door, and the second interlocking door. There is a problem in that the first interlocking door and the second interlocking door can not be used as it is, and the guide rollers fixed to the upper surface of the first interlocking door, the middle door and the second interlocking door on the three guide rails installed on the lower surface of the door frame, respectively. Since there is a structure that is moved there is a problem that excessive noise is generated in the process of moving each guide roller in the guide rail.

The present invention has been made to solve the above problems of the prior art, the purpose of which is to move each door on the upper rail when the middle door, the front door and the rear door is to move in the longitudinal direction of the upper rail, respectively. By minimizing the clearance gap, the interlock device of the triple interlocking door for preventing the generation of noise to the maximum while maintaining the movement of each door stably.

Another object of the present invention is to provide an interlocking device of a triple interlocking door to remove the empty space formed at the top of each door to prevent the wind from entering the top of each door to improve the effect of wind and sound insulation.

The interlocking device of the triple interlocking door according to the present invention includes an installation plate part fixedly installed on an upper part of the door frame, a first guide part formed in the longitudinal direction of the installation plate part at a lower center of the installation plate part, and the installation plate part. A second guide portion formed in the longitudinal direction of the mounting plate portion in parallel with the first guide portion on a lower front surface, and formed in the longitudinal direction of the installation plate portion in parallel with the first guide portion on the lower rear surface of the installation plate portion; An upper rail having a third guide part; A slider which is inserted into the first guide part of the upper rail and is formed to be movable along the first guide part, and on one side a slider having a through hole for fixing and coupling the middle door; A belt rotatably installed between a pair of pulleys installed on an upper portion of the slider; A front door fixing part for fixedly coupling a first belt fixing part fixedly coupled to one point of the belt, a front door formed adjacent to the first belt fixing part and movably installed in the front of the middle door; The intermediate door is provided when the belt is moved with a first guider installed above the front door fixing part and movably inserted into the second guide part of the upper rail to move along the second guide part. A first interlocking tool for allowing the front door to move relative to each other; And a rear door fixing part configured to securely couple a second belt fixing part fixedly coupled to one point of the belt, and a rear door formed adjacent to the second belt fixing part and movably installed at a rear side of the middle door. And a second guider installed on an upper side of the rear door fixing part and movably fitted to a third guide part of the upper rail to move along the third guide part. And a second interlocking port for allowing the door and the rear door to move relative to each other.

The interlock device of the triple interlocking door according to the present invention, when the middle door, the front door and the rear door are to move in the longitudinal direction of the upper rail, respectively, to minimize the clearance tolerance that each door moves on the upper rail Therefore, the noise can be prevented to the maximum while maintaining the movement of each door stably.

In addition, the interlock device of the triple interlocking door of the present invention, by removing the empty space formed on the upper end of each door can prevent the wind flows into the upper end of each door to improve the effect of wind and sound insulation. .

1 is an external perspective view of an interlock device of the triple interlocking door of the present invention.

Figure 2 is an exploded perspective view of the interlock device of the triple interlocking door of the present invention.

Figure 3 is an external perspective view of the upper rail in the interlock device of the triple interlocking door of the present invention.

Figure 4 is a perspective view showing three doors coupled to the lower linkage of the triple linkage door of the present invention.

Figure 5 is a partially exploded perspective view of the main part of the interlock device of the triple interlocking door of the present invention.

Figure 6 is a perspective view of the upper rail removed from the interlock device of the triple interlocking door of the present invention.

Figure 7 is an external perspective view of the fixing piece in the interlock device of the triple interlocking door according to the present invention.

Figure 8 is a perspective view showing a state in which the triple interlocking door is opened in the interlock device of the triple interlocking door of the present invention.

Figure 9 is a perspective view showing a state in which the triple interlocking door is opened about halfway in the interlock device of the triple interlocking door of the present invention.

10 is a perspective view showing a state in which the triple interlocking door is closed in the interlock device of the triple interlocking door of the present invention.

Hereinafter, a linkage device of a triple interlocking door according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The interlocking device of the triple interlocking door according to the present invention is for interlocking and opening three doors installed in a sliding manner such as a door of a building or a movable partition wall, as shown in FIGS. 1 and 2. The upper rail 10, the slider 20, the belt 37, the first interlocking tool 40, and the second interlocking device 50 are provided.

The upper rail 10 is fixed to the upper portion of the door frame (not shown) to guide the three doors, that is, the middle door (D1), the front door (D2), the rear door (D3) to slide in parallel with each other. 1 to 3, the mounting plate portion 11 is fixed to the upper portion of the door frame, and is formed in the longitudinal direction of the mounting plate portion 11 in the lower center of the mounting plate portion 11 A first guide part 12 and a second guide part 13 formed in the longitudinal direction of the mounting plate part 11 in parallel with the first guide part 12 on a lower front surface of the mounting plate part 11; And a third guide part 14 formed at a lower rear surface of the mounting plate part 11 in the longitudinal direction of the mounting plate part 11 in parallel with the first guide part 12.

As shown in FIGS. 1 and 2, the first guide part 12 may move the middle door D1 in the longitudinal direction of the upper rail 10 from the lower center of the upper rail 10. As a part for guiding, as shown in FIG. 3, it consists of the 1st vertical wall 15, the 2nd vertical wall 16, the 1st guide rail 15a, and the 2nd guide rail 16a.

The first vertical wall 15 is formed in the longitudinal direction of the mounting plate portion 11 so as to be perpendicular to the lower surface from one point located on the front side with respect to the central point of the mounting plate portion 11.

The second vertical wall 16 is formed on the bottom surface of the mounting plate part 11 in parallel with the first vertical wall 15 at one point located on the rear side with respect to the center point of the mounting plate part 11. . Here, the terms front and rear are to mean the right and left sides of the drawing, respectively, in the mounting plate 11 shown in FIGS. 2 and 3.

As shown in FIG. 3, the first guide rail 15a extends horizontally at the lower end of the first vertical wall 15, and the second guide rail 16a is formed on the second vertical wall 16. It extends horizontally from the lower end of the.

As shown in FIGS. 1 and 2, the second guide part 13 is a part for guiding the front door D2 to be movable in the longitudinal direction of the upper rail 10. As described above, the first vertical wall 15, the third vertical wall 17, the first guide rail 15a, and the third guide rail 17a are formed.

The third vertical wall 17 is a lower surface of the mounting plate portion 11 in parallel with the first vertical wall 15 at a point located on the front side of the mounting plate portion 11 than the first vertical wall 15. The third guide rail 17a extends horizontally from the lower end of the third vertical wall 17.

As shown in FIGS. 1 and 2, the third guide part 14 is a part for guiding the rear door D3 to be movable in the longitudinal direction of the upper rail 10. As described above, the second vertical wall 16, the fourth vertical wall 18, the second guide rail 16a, and the fourth guide rail 18a are formed.

The fourth vertical wall 18 is a lower surface of the mounting plate portion 11 in parallel with the second vertical wall 16 at a point located on the rear side of the mounting plate portion 11 than the second vertical wall 16. The fourth guide rail 18a extends horizontally from the lower end of the fourth vertical wall 18.

1 and 8, the intermediate door D1 is positioned below the first guide part 12 of the upper rail 10 and is formed to be movable in the longitudinal direction of the upper rail 10. When the triple interlocking doors are all closed, it is positioned at the center of the opening (not shown) as shown in FIG. 10, and is inserted into the through hole of the base plate 21 to be described later as shown in FIG. 4 at the upper end thereof. A pair of pivot shafts p1 and p2 for lowering and being fixedly coupled to the base plate 21 are protruded from each other.

The front door D2 is positioned below the second guide part 13 of the upper rail 10 as shown in FIGS. 1 and 8, and is formed to be movable in the longitudinal direction of the upper rail 10. When the triple interlocking doors are all closed, it is positioned at the right side of the opening as shown in FIG. 10, and the first interlocking hole 40 and the front door auxiliary guider 60 which will be described later as shown in FIG. A pair of pivot axes (p3, p4) to be fixed to () are spaced apart from each other are formed protruding.

The rear door D3 is positioned below the third guide part 14 of the upper rail 10 as shown in FIGS. 1 and 8, and is formed to be movable in the longitudinal direction of the upper rail 10. When the triple interlocking doors are all closed, the three interlocking doors are positioned at the left side of the opening as shown in FIG. 10, and the second interlocking hole 50 and the rear door auxiliary guider 70 which will be described later as shown in FIG. A pair of pivot axes (p5, p6) to be fixed to () is spaced apart from each other are formed protruding.

As shown in FIG. 1 and FIG. 8, the slider 20 allows the middle door D1 to move along the first guide part 12. As shown in FIG. 21 and a pair of movable bodies 30.

The base plate 21 is a flat member which is installed to be movable along the first guide part 12, as shown in FIG. 2, one side of which is formed on a pair of upper portions of the middle door D1. A through hole 22 for fitting the pivot shafts p1, p2 (see FIG. 4) is formed, and a belt 37 is rotatably installed on the upper portion thereof. Reference numerals 23 and 24 are holes for engaging the pins 25 for fixing the movable body 30 to be described later, 26 are holes for fitting the shaft 39 of the pulley 38, and 27 are windshields. Guide hole for fitting (89), 89 is the windshield.

The pair of movable bodies 30 are respectively formed at both ends of the base plate 21 as shown in FIGS. 2 and 4, and the first guide rail 15a and the second guide rail 16a are respectively formed. Interposed between the base plate 21 and the first guide part 12 so as to be movable between the first guide groove 31 and the second guide groove 32 as shown in FIG. 2. And a fitting groove 33 and through holes 34 and 35.

The first guide groove 31 is fitted to the first guide rail 15a is moved along the first guide rail 15a, the second guide groove 32 is the second guide rail ( 16a) is fitted to be moved along the second guide rail 16a.

Here, the first guide groove 31 is described as being moved along the first guide rail (15a) by fitting the first guide rail (15a), the first guide groove (31) By simply changing to a protrusion and changing the first guide rail 15a to a groove, the protrusion may be guided to the groove to be moved along the first guide 12.

The fitting groove 33 is a portion for fitting and coupling both ends of the base plate 21, the through holes 34, 35 are pins for fixing the base plate 21 and the movable body 30. As holes, they are formed at positions corresponding to pin holes 23 and 24 of the base plate 21.

2, 4 and 5, the belt 37 is rotatably installed between a pair of pulleys 38 installed on the base plate 21. Reference numeral 39 is a pulley shaft.

As shown in FIGS. 2 and 4 to 6, the first interlocking tool 40 moves relative to the intermediate door D1 and the front door D2 when the belt 37 moves. The first belt fixing part 41, the front door fixing part 42, and the first guider 43 are provided for this purpose.

The first belt fixing portion 41 is fixed to one point of the belt 37, as shown in Figures 2, 4 to 6 are moved with the movement of the belt 37.

The front door fixing part 42 is a plate-shaped member which is formed adjacent to the first belt fixing part 41, and fixes the front door D2 which is movably installed at the front of the middle door D1 at the center thereof. The through hole 42a for engaging is formed.

The first guide 43 is installed on the upper side of the front door fixing portion 42 and the third guide groove (43a) for moving along the second guide portion 13 of the upper rail (10) And a fourth guide groove 43b.

The third guide groove 43a is formed to be movable along the first guide rail 15a by fitting the first guide rail 15a, and the fourth guide groove 43b is the third guide. The rail 17a is fitted to be movable along the third guide rail 17a. Reference numeral 44 is a pin hole for fitting the pin 45 to fix the windshield guide 80 to be described later.

As shown in FIGS. 2 and 4 to 6, the second interlocking tool 50 moves relative to each other by interlocking the intermediate door D1 and the rear door D3 when the belt 37 moves. To this end, a second belt fixing part 51, a rear door fixing part 52, and a second guider 53 are provided.

The second belt fixing part 51 is fixedly coupled to one point of the belt 37 as shown in FIGS. 2 and 4 to 6 and moved together with the movement of the belt 37.

The rear door fixing part 52 is a plate-shaped member which is formed adjacent to the second belt fixing part 51, and fixes a rear door D3 which is movably installed at the rear of the middle door D1 at the center thereof. The through hole 52a for engaging is formed.

The second guide 53 is installed on the upper side of the rear door fixing portion 52 and the fifth guide groove 53a for moving along the third guide portion 14 of the upper rail 10. And a sixth guide groove 53b.

The fifth guide groove 53a is formed to be movable along the second guide rail 16a by fitting the second guide rail 16a, and the sixth guide groove 53b is the fourth guide groove. The rail 18a is fitted to be movable along the fourth guide rail 18a. Reference numeral 54 is a pin hole for fitting the pin 55 to fix the windshield guide 87 to be described later.

On the other hand, the interlock device of the triple interlocking door according to the present invention as shown in Figures 2, 4 to 6, the front door assistance to be moved along the second guide portion 13 of the upper rail (10) The guider 60 may be further included.

The front door assistance guider 60 is to allow the front door D2 to be stably moved along the second guide part 13 of the upper rail 10, as shown in FIGS. 2 and 4 to 6. As described above, a through hole 61 is formed at the center for fitting the pivot shaft p4 (see FIG. 4), and at both sides thereof, a first guide groove 62 for fitting the first guide rail 15a and a first guide groove 62. A second guide groove 63 for fitting the three guide rails 17a is formed. Reference numeral 64 is a pin hole for fitting the pin 65 to fix the windshield guide 80 to be described later.

In addition, the interlock device of the triple interlocking door according to the present invention, as shown in Figs. 2, 4 to 6, the wind between the front door auxiliary guider 60 and the first linkage 40 is the front In order to block the inflow to the upper side of the door (D2) may be further provided with a windshield guide 80 and the windshield 86.

The windshield guide 80 is a flat member fixed to the lower portion of the first interlocking guide 40 and the front door auxiliary guider 60, and is formed to be movable on the second guide 13. The guide hole 81 for fitting the windshield 86 to be described later is formed. Reference numeral 82 is a pin hole, 83, 84 are through holes for fitting the pivot shafts (p3, p4, see Fig. 4), 85 is to guide the first interlocking hole 40 and the front door auxiliary guider (60). It is a guide to do it.

The windshield 86 is installed in the guide hole 81 formed in the lower portion of the windshield guide 80 to prevent the wind from flowing between the windshield guide 80 and the front door (D2), rubber Ones of elastic materials such as may be used.

In addition, the interlock device of the triple interlocking door according to the present invention is a rear door assist guider 70 for fitting the pivot shaft (p5) of the rear door (D3) as shown in Figs. The rear door assistance guider 70 may be stably moved along the third guide part 14 of the upper rail 10.

The rear door assist guider 70 has only a difference in position when compared with the front door assist guider 60, and the detailed description thereof will be omitted.

A lower portion of the rear door assist guider 70 and the second interlocking port 50 may further include a windshield blocking means for blocking wind from entering the upper side of the rear door D3.

The windshield blocking means may be a windshield guide 87 and windshield 88, and the windshield guide 87 and windshield 88 are the windshield guide 80 and windshield 86 and the Since the structure is the same, description thereof is omitted.

In addition, the interlock device of the triple interlocking door according to the present invention is fixed to one side of the upper rail 10 as shown in Figs. 1, 2, 4-7, the rear door (D3) on the left side It is provided with a fixing member 90 to be fixed.

The fixing member 90 may be used in various forms, and for example, the fixing member 90 may include a pressing piece 91, a fixing piece 92, and a bolt 93 as shown in FIG. 7.

7 is a view of the bottom surface for convenience of description. Referring to FIG. 7, the fitting portions 19 and 4 formed with the fixing piece 92 and the pressing piece 91 on one side of the upper rail 10 are referred to. ), The fixing piece 92 is located at the lower portion of the fitting portion 19, the pressing piece 91 is located at the upper portion of the fitting portion 19, in this state bolt (93) When the fixing piece 92 is fastened to the bolt holes 92a and 91a of the pressing piece 91 by pressing, the pressing piece 91 is pressed while the fixing piece 92 is fixed to the fitting portion 19. Will be.

The fixing piece 92 has a fitting hole 92b formed at the center thereof in a resilient manner so that when the pivot shaft p5 of the rear door D3 is forcibly fitted to the fitting hole 92b, the rear door ( D3) is unable to move, and when the pivot shaft p5 is separated from the fitting hole 92b, the rear door D3 is movable.

The operation of the interlock device of the triple interlocking door according to the present invention having the above configuration will be described with reference to the accompanying drawings.

8 is a perspective view illustrating a state when the door is opened, and the upper rail 10 and the fixing member 90 are disassembled and shown for convenience of description.

In FIG. 8, the three doors, that is, the middle door D1, the front door D2, and the rear door D3 are positioned in one direction and remain overlapped. In this state, the door is opened. The first linkage 40 is located on the left side in the drawing of FIG. 8, and the second linkage ball 50 is located on the right side in the view of FIG. 8.

When the door is to be closed in such a state, as shown in FIG. 9, when the front door D2 is moved in the direction of the arrow, the first interlocking hole 40 and the front door assistance positioned at the upper side of the front door D2 are assisted. The guider 60 moves to the right in FIG. 9, and since the belt 37 is fixed to the first interlocking hole 40, the belt 37 also moves along with the movement of the first interlocking hole 40. As the belt 37 is moved, the intermediate door D1 is also moved in the direction of the arrow as shown in FIG. 9, and the rear door D3 is fixed to the fixed member. In FIG. 9, one side end is fixed to the upper rail 10 not shown in FIG. 9, so that the rear door D3 does not move but only the middle door D1, and finally, shown in FIG. 10. As shown, the front door (D2) is located on the right, the middle door (D1) is in the center Position, the rear door (D3) is a door located on the left side is maintained fully closed.

By the way, the interlock device of the triple interlocking door according to the present invention is the first guide groove 31 and the second guide groove (31) of the movable body 30 formed in the slider 20 located above the middle door (D1) ( 32 is stably moved in the state where the upper rail 10 is fitted to the first guide rail 15a and the second guide rail 16a, respectively, so that the intermediate door D1 is moved to the first guide part ( When moving along the 12), it is possible to prevent the middle door (D1) from swinging left and right to reduce the clearance gap of the middle door (D1) as much as possible, thus reducing the noise caused by the movement of the door This can be reduced as much as possible.

In addition, the first interlocking tool 40 formed on the upper side of the front door D2 includes a first guider 43 formed with a third guide groove 43a and a fourth guide groove 43b. Since the first guider 43 is fitted to the second guide part 13 of the upper rail 10 to perform a stable movement, it is possible to minimize the occurrence of the clearance gap or the noise caused by the movement of the front door D2.

In addition, the second linkage 50 formed in the upper portion of the rear door D3 includes a second guider 53 formed with a fifth guide groove 53a and a sixth guide groove 53b. Since the two guiders 53 are fitted to the third guide part 14 of the upper rail 10 to perform a stable movement, the two guiders 53 can reduce the occurrence of the clearance gap or the noise caused by the movement of the rear door D3 as much as possible.

While specific embodiments of the present invention have been described above by way of example, these are for illustrative purposes only and are not intended to limit the protection scope of the present invention. It will be apparent to those skilled in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.

The interlock device of the triple interlocking door according to the present invention, when the middle door, the front door and the rear door are to move in the longitudinal direction of the upper rail, respectively, to minimize the clearance tolerance that each door moves on the upper rail Therefore, the noise can be prevented to the maximum while maintaining the movement of each door stably.

Claims (8)

Mounting plate portion 11 fixed to the upper portion of the door frame, the first guide portion 12 formed in the longitudinal direction of the mounting plate portion 11 in the lower center of the mounting plate portion 11, and the mounting plate portion 11 The second guide portion 13 is formed in the longitudinal direction of the mounting plate portion 11 in parallel to the first guide portion 12 on the lower front of the), and the first rear surface on the lower rear of the mounting plate portion 11 An upper rail having a third guide part 14 formed in the longitudinal direction of the mounting plate part 11 in parallel with the guide part 12; Slider is inserted into the first guide portion 12 of the upper rail 10 is formed to be movable along the first guide portion 12, the slider formed with a through hole for fixing the intermediate door (D1) on one side 20; A belt (37) rotatably installed between the pair of pulleys (38) installed on the upper portion of the slider (20); The first belt fixing portion 41 fixedly coupled to one point of the belt 37, the front surface is formed adjacent to the first belt fixing portion 41 and movable on the front surface of the middle door (D1) The front door fixing part 42 for fixing the door D2 and the front door fixing part 42 are installed on the upper side of the front door fixing part 42 so as to be movable to the second guide part 13 of the upper rail 10. The intermediate door D1 and the front door D2 move relative to each other when the belt 37 is moved by having a first guider 43 formed to be movable along the second guide part 13 when the belt 37 is moved. A first linkage 40 to be used; And A second belt fixing portion 61 fixedly coupled to one point of the belt 37, and a rear surface formed adjacent to the second belt fixing portion 61 and movable on the rear surface of the middle door D1. A rear door fixing part 62 for fixing the door D3 and an upper side of the rear door fixing part 62 and movably inserted into the third guide part 14 of the upper rail 10. The intermediate door D1 and the rear door D3 move relative to each other when the belt 37 is moved by having a second guider 53 formed so as to move along the third guide part 14. A second interlocking device (50) to the; interlocking device of the triple interlocking door consisting of. The method of claim 1, The first guide part 12, A first vertical wall 15 formed in the longitudinal direction of the mounting plate part 11 so as to be perpendicular to the lower surface from one point located on the front side with respect to the center point of the mounting plate part 11; A second vertical wall 16 formed on the bottom surface of the mounting plate part 11 in parallel with the first vertical wall 15 at one point located on the rear side with respect to the center point of the mounting plate part 11; A first guide rail 15a extending horizontally from the lower end of the first vertical wall 15; And And a second guide rail (16a) extending horizontally from the lower end of the second vertical wall (16). The method of claim 2, The slider 20, A base plate 21 inserted into the first guide part 12 so as to be movable, and having a through hole formed at one side thereof to fix the intermediate door D1; And It is formed at both ends of the base plate 21, respectively, is sandwiched between the first guide rail (15a) and the second guide rail (16a) so that the base plate 21 along the first guide portion 12 A pair of movable bodies 30 to be movable; Interlocking device of the three interlocking doors. The method of claim 3, wherein The movable body 30, A first guide groove 31 to which the first guide rail 15a is fitted to be movable along the first guide rail 15a; The second interlocking device of the interlocking door having a second guide groove (32) is formed to be movable along the second guide rail (16a) is fitted to the second guide rail (16a). The method according to any one of claims 2 to 4, The second guide part 13, The first vertical wall (15); Third vertical wall 17 formed on the lower surface of the mounting plate portion 11 in parallel with the first vertical wall 15 at a point located on the front side of the mounting plate portion 11 than the first vertical wall 15. ); The first guide rail 15a; And A third guide rail 17a extending horizontally from the lower end of the third vertical wall 17; The third guide 14, The second vertical wall (16); A fourth vertical wall 18 formed on the bottom surface of the mounting plate 11 in parallel with the second vertical wall 16 at a point located on the rear side of the mounting plate portion 11 rather than the second vertical wall 16. ); The second guide rail 16a; And And a fourth guide rail (18a) extending horizontally from the lower end of the fourth vertical wall (18). The method of claim 5, The first guider 43, A third guide groove 43a in which the first guide rail 15a is fitted to be movable along the first guide rail 15a; The interlocking device of the triple interlocking door having a fourth guide groove (43b) is formed so that the third guide rail (17a) is fitted to be movable along the third guide rail (17a). The method of claim 6, The front surface is formed so as to be movable along the second guide portion 13 in a position spaced apart from the first interlocking hole 40, the through-hole 61 for fixing the front door (D2) in the center Door auxiliary guider 60; is further included, The front door auxiliary guider 60, A first guide groove 62 for fitting the first guide rail 15a, Interlocking device of the triple interlocking door is provided with a second guide groove (63) for fitting the third guide rail (17a). The method of claim 7, wherein The first interlocking device 40 and the front door auxiliary guider 60 is fixedly attached to the second guide portion 13 and is formed to be movable, the lower portion of the windshield is fixed to the front door (D2) Guide 80; And The windshield is installed in the lower portion of the guide 80, the windshield to prevent the flow of wind between the windshield guide 80 and the front door (D2) (86); the triple interlocking door further comprises Interlock.

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