CN210598668U - Double-rail three-leaf sliding door - Google Patents

Abstract

The utility model discloses a double track three push-and-pull doors. The three push-and-pull doors of double track include: the door comprises a door frame, a fixed door leaf and two movable door leaves, wherein the fixed door leaf and the two movable door leaves are arranged in the door frame in a staggered and parallel mode, the fixed door leaf is fixedly connected with the door frame, the two movable door leaves are both in sliding connection with the door frame, and the two movable door leaves can be opened or closed relative to the fixed door leaf when sliding along the door frame. The technical scheme of the utility model the width of opening when can increase push-and-pull removal door leaf.

Description

Double-rail three-leaf sliding door

Technical Field

The utility model relates to a door and window technical field, in particular to double track three-leaf push-and-pull door.

Background

At present, the sliding door is widely applied due to the advantages of no space occupation, spaciousness, brightness and the like. In the existing double-track three-leaf sliding door structure, three door leaves are arranged on two tracks in a sliding mode and can be moved in a sliding mode, so that the width of one door leaf can be opened at most when the door leaves are moved in the sliding mode, and the opening width is relatively small.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three push-and-pull doors of double track, the width of opening when aiming at increase push-and-pull removal door leaf.

In order to achieve the above object, the utility model provides a three push-and-pull doors of double track, including door frame, a fixed door leaf and two activity door leaves, one fixed door leaf and two the crisscross parallel arrangement of activity door leaf in the door frame, one fixed door leaf with door frame fixed connection, two the activity door leaf all with door frame sliding connection, two the activity door leaf is followed can for when the door frame slides fixed door leaf is opened or is closed.

The utility model discloses an in the embodiment, the doorjamb includes frame, lower frame, left frame, right frame and mullion, go up the frame the left side frame the lower frame reaches the right side frame is end to end in proper order to all be fixed in the wall body, the both ends of mullion are fixed in respectively go up the frame with the lower frame, fixed door leaf all around respectively with the left side frame go up the frame the lower frame reaches well mullion, each the upper and lower side of activity door leaf respectively with go up the frame with lower frame sliding connection.

In an embodiment of the present invention, the upper frame and the lower frame are both provided with two slide rails, the two slide rails are both disposed on one side of the middle mullion facing the outdoor, and the two slide rails are arranged in parallel; the upper side and the lower side of the two movable door leaves are both provided with a sliding piece; the sliding part is connected with the sliding rail in a sliding manner.

The utility model discloses an in the embodiment, two the slide rail includes first slide rail and second slide rail, first slide rail is located the mullion with between the second slide rail, at least one end of first slide rail is provided with the breach of stepping down that supplies the rainwater to pass through, the lower frame in first slide rail with be provided with drainage channel between the second slide rail.

The utility model discloses an in the embodiment, the lower frame is equipped with the holding chamber, the side of going up of lower frame in first slide rail with seted up the intercommunication between the second slide rail the first wash port in holding chamber, the intercommunication has been seted up to the lateral wall of lower frame the second wash port in holding chamber, first wash port the holding chamber reaches the second wash port forms drainage channel.

In an embodiment of the present invention, a sealing block is convexly disposed on the upper side surface of the lower frame, and the sealing block is disposed between the two slide rails; and/or, the downside of going up the frame is protruding to be equipped with sealed piece, sealed piece sets up in two between the slide rail for prevent indoor outer air flow or rainwater entering.

The utility model discloses an in the embodiment, each movable door leaf all includes well club, fan above club, fan side club, fan below club and glass, well club fan above club fan side club reaches club head and the tail are connected in proper order below the fan to enclose and close and form installation space, glass install in the installation space, fan above club with go up frame sliding connection, fan below club with lower frame sliding connection.

The utility model discloses an in the embodiment, well muntin orientation one side of well muntin is provided with first trip portion, well muntin orientation one side of well muntin is provided with second trip portion, second trip portion in the joint when movable door leaf closes in first trip portion.

In an embodiment of the present invention, a handle portion is disposed on a side of the mullion opposite to the movable door leaf, and a handle portion is disposed on a side of the mullion opposite to the fixed door leaf, so as to facilitate the push-pull operation of the movable door leaf; and/or a handle part is arranged on one side of the fan side stile facing the indoor space and is used for controlling the movable door leaf to open or close relative to the fixed door leaf.

In an embodiment of the present invention, the fixed door leaf includes a fixed frame and glass installed in the fixed frame, a sealing rubber strip is disposed between the upper side of the fixed frame and the upper frame, the upper side of the sealing rubber strip abuts against the upper frame, and the lower side of the sealing rubber strip abuts against the upper side of the fixed frame; and/or, the downside of fixed frame with be provided with joint strip between the lower frame, joint strip's upside butt in the downside of fixed frame, and downside butt in the lower frame.

The technical scheme of the utility model, set up a door leaf in the three push-and-pull doors of double track into fixed door leaf, fixed door leaf and door frame fixed connection, two other door leaves set up to movable door leaf, movable door leaf and door frame sliding connection to, fixed door leaf and the crisscross parallel arrangement of two movable door leaves are in the door frame, and movable door leaf can be opened or closed for fixed door leaf in the slip process. Such setting, when carrying out the push-and-pull removal to movable door leaf, can remove movable door leaf to fixed door leaf's front for each movable door leaf overlaps with fixed door leaf, and the width of two door leafs just so can be opened, compares in current double track three push-and-pull doors promptly, and the width of opening when its push-and-pull removal has obtained effectual increase.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the double-rail three-leaf sliding door of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 1;

FIG. 5 is a schematic cross-sectional view taken along line D-D of FIG. 1;

FIG. 6 is a schematic view of a portion of the dual-rail three-leaf sliding door at another viewing angle;

FIG. 7 is an exploded view of a portion of the movable door leaf of FIG. 1;

FIG. 8 is a schematic view of the lower bezel of FIG. 1 from another perspective;

fig. 9 is a schematic structural view of the lower frame of fig. 1 from a further perspective.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The utility model provides a double track three push-and-pull doors 100.

Referring to fig. 1 and fig. 2, in an embodiment of the dual-rail three-leaf sliding door 100 of the present invention, the dual-rail three-leaf sliding door 100 includes a door frame 10, a fixed door leaf 30 and two movable door leaves 50, the fixed door leaf 30 and the two movable door leaves 50 are disposed in the door frame 10 in a staggered and parallel manner, the fixed door leaf 30 is fixedly connected to the door frame 10, the two movable door leaves 50 are both slidably connected to the door frame 10, and the two movable door leaves 50 can be opened or closed relative to the fixed door leaf 30 when sliding along the door frame 10.

Specifically, the door frame 10 is a quadrilateral frame structure, and is fixedly installed on the wall, and the fixed door leaf 30 is generally fixedly installed on one side frame of the door frame 10, and the fixed installation mode can be screw fixation, buckle fixation, or other reasonable and effective fixing modes. Both movable door leaves 50 are slidably disposed in the door frame 10, and the movable door leaves 50 can be opened or closed relative to the fixed door leaf 30 during the sliding process. Moreover, the two movable door leaves 50 and the fixed door leaves 30 are arranged in parallel in a staggered manner, so that when each movable door leaf 50 is pushed and pulled, each movable door leaf 50 can be moved to the front of the fixed door leaf 30, each movable door leaf 50 is overlapped with the fixed door leaf 30, the width of the two door leaves can be opened, and compared with the width which can only be opened by one door leaf at most, the width of the two door leaves is relatively increased.

Here, the fixed door 30 is provided on the indoor side of the door frame 10, and the two movable doors 50 may be provided on the outdoor side of the fixed door 30, or of course, the two movable doors 50 may be provided on both sides of the fixed door 30.

Therefore, can understand, the technical scheme of the utility model, set up a door leaf in the double track three push-and-pull door 100 into fixed door leaf 30, fixed door leaf 30 and door frame 10 fixed connection, two other door leaves set up to movable door leaf 50, movable door leaf 50 and door frame 10 sliding connection to, fixed door leaf 30 and two crisscross parallel arrangement of movable door leaf 50 are in door frame 10, and movable door leaf 50 can open or be closed for fixed door leaf 30 at the slip process. Such setting, when carrying out the push-and-pull removal to movable door leaf 50, can remove movable door leaf 50 to fixed door leaf 30 in the front for each movable door leaf 50 overlaps with fixed door leaf 30, and the width of two door leafs just so can be opened, compares in current double track three push-and-pull doors promptly, and the width of opening when its push-and-pull removal has obtained effectual increase.

Further, door frame 10 includes last frame 11, lower frame 12, left frame 13, right frame 14 and well muntin 15, and last frame 11, left frame 13, lower frame 12 and right frame 14 are end to end in proper order to all be fixed in the wall body, and the both ends of well muntin 15 are fixed in respectively and are gone up frame 11 and lower frame 12, fixed door leaf 30 all around respectively with left frame 13, last frame 11, lower frame 12 and well muntin 15, the upper and lower side of each movable door leaf 50 respectively with last frame 11 and lower frame 12 sliding connection.

Specifically, the upper frame 11, the left frame 13, the lower frame 12 and the right frame 14 are sequentially connected end to end and enclose to form a quadrangular door frame 10 structure. And these four borders equal fixed mounting wall body still is provided with well mullion 15 between top frame 11 and the lower frame 12, well mullion 15 perpendicular to top frame 11 sets up, well mullion 15 just encloses with top frame 11, left frame 13 and lower frame 12 like this and closes and form quadrilateral frame structure, fixed door leaf 30 all around fixed mounting in this quadrilateral frame, generally, fixed door leaf 30 all around all through fix with screw in top frame 11, left frame 13, lower frame 12 and well mullion 15, so alright realize fixed door leaf 30's fixed mounting. And, the upper and lower ends of each movable door leaf 50 are slidably connected to the upper frame 11 and the lower frame 12, respectively, so that the movable door leaf 50 can be opened or closed relative to the fixed door leaf 30 during sliding along the upper and lower frames 12.

The middle vertical frame 15 is preset with screw holes, and during assembly, the middle vertical frame 15 is screwed with the upper frame 11 and the lower frame 12 by self-tapping screws.

Referring to fig. 2 to 5, in an embodiment of the present invention, the upper frame 11 and the lower frame 12 are both provided with two sliding rails, the two sliding rails are both disposed on the outdoor side of the middle mullion 15, and the two sliding rails are disposed in parallel; the upper side and the lower side of the two movable door leaves 50 are both provided with a sliding part 521; a sliding member 521 is slidably connected to a sliding rail.

Specifically, the protruding two slide rails that are equipped with of the side of going up of lower frame 12, the slide rail is protruding muscle form, and the length direction along lower frame 12 extends the setting, and two slide rails are parallel to each other and set up, and all locate well mullion 15 towards outdoor one side, correspondingly, the downside of going up frame 11 also corresponds sets up two slide rails. And the upper side and the lower side of each movable door leaf 50 are provided with a sliding member 521, when the movable door leaf 50 is installed, the two sliding members 521 are installed on the upper side and the lower side of the movable door leaf 50 respectively, then the movable door leaf 50 and the sliding member 521 are installed between the upper frame 11 and the lower frame 12 as a whole, and at this time, one sliding member 521 is installed on a sliding rail correspondingly, so that the installed movable door leaf 50 can slide along the upper frame 11 and the lower frame 12.

It should be noted that, here, the sliding member 521 may be a sliding block or a pulley, in an embodiment of the present invention, the lower side surface of each movable door leaf 50 is provided with a pulley, the pulley is slidably connected to the sliding rail of the lower frame 12, the upper side surface of each movable door leaf 50 is provided with a sliding block, and the sliding block is slidably connected to the sliding rail of the upper frame 11. When the movable door leaf 50 is pushed or pulled, the pulley mainly slides, and the slider assists in sliding.

Further, the two slide rails include a first slide rail 121 and a second slide rail 122, the first slide rail 121 is disposed between the middle vertical frame 15 and the second slide rail 122, at least one end of the first slide rail 121 is provided with a yielding notch 1211 through which rainwater passes, the lower frame 12 is provided with a drainage channel (not labeled) between the first slide rail 121 and the second slide rail 122, and the drainage channel is communicated outdoors.

Specifically, the first slide rail 121 is located between the middle vertical frame 15 and the second slide rail 122, and at least one end of the first slide rail 121 is provided with a relief notch 1211 for allowing rainwater to pass through, and the drainage channel penetrates through the lower frame 12 and is communicated with the outdoor, so that the rainwater flows into between the first slide rail 121 and the second slide rail 122 through the relief notch 1211 and is drained to the outdoor through the drainage channel.

Referring to fig. 3, 8 and 9, the lower frame 12 is provided with a receiving cavity 125, a first drainage hole 123 communicating with the receiving cavity 125 is formed between the first slide rail 121 and the second slide rail 122 on the upper side of the lower frame 12, a second drainage hole 124 communicating with the receiving cavity 125 is formed on the side wall of the lower frame 12, and the first drainage hole 123, the receiving cavity 125 and the second drainage hole 124 form a drainage channel.

Specifically, the lower frame 12 is a hollow structure, the inside of the lower frame forms an accommodating cavity 125, the first drainage hole 123 is a circular hole and is opened on the upper side surface of the lower frame 12, and the first drainage hole 123 is located between the first slide rail 121 and the second slide rail 122 and is communicated with the accommodating cavity 125. The second drainage hole 124 is a substantially oblong hole, is opened on the outdoor side wall of the lower frame 12, and is communicated with the accommodating cavity 125. Thus, the first drainage hole 123, the accommodating cavity 125 and the second drainage hole 124 form a drainage channel, and rainwater flows through the relief notch 1211 and flows into the accommodating cavity 125 through the first drainage hole 123, and finally is drained to the outside through the second drainage hole 124.

Optionally, the first drainage holes 123 are provided in plural, the plural first drainage holes 123 are spaced along the length direction of the lower frame 12 and are all communicated with the accommodating cavity 125, and similarly, the plural second drainage holes 124 are also provided, and the plural second drainage holes 124 are spaced along the length direction of the lower frame 12 and are all communicated with the accommodating cavity 125. The arrangement can ensure that the drainage operation is carried out more smoothly and quickly.

It should be noted that the lower wall of the accommodating cavity 125 is inclined, so that the rainwater can smoothly flow to the second drainage hole 124 along the inclined wall, thereby ensuring that the drainage operation is performed more smoothly and quickly.

Referring to fig. 3 to 5 again, in an embodiment of the present invention, a sealing block 111 is protruded on an upper side surface of the lower frame 12, and the sealing block 111 is disposed between the two sliding rails; and/or, the lower side of the upper frame 11 is convexly provided with a sealing block 111, and the sealing block 111 is arranged between the two sliding rails to prevent indoor and outdoor air from flowing or rainwater from entering.

Specifically, the sealing block 111 may be disposed on the upper side of the lower frame 12 to reduce the gap between the movable door leaf 50 and the lower frame 12, or may be disposed on the lower side of the upper frame 11 to reduce the gap between the movable door leaf 50 and the upper frame 11, and of course, the sealing blocks 111 may be disposed on both the upper side of the lower frame 12 and the lower side of the upper frame 11. The setting of sealed piece 111 here mainly plays sealed effect to effectively prevent indoor outer air flow, thereby guarantee indoor better leakproofness and syllable-dividing effect, and sealed piece 111 here has waterproof performance, can prevent the rainwater entering well. Meanwhile, the lower side surface of the upper frame 11 and the upper side surface of the lower frame 12 are both provided with the sealing blocks 111, so that the movable door leaf 50 can be effectively prevented from moving upwards and falling off, and the anti-theft function is also achieved.

Referring to fig. 2 to 5 again, each movable door leaf 50 includes a mullion 51, an upper sash mullion 52, a side sash mullion 54, a lower sash mullion 53 and glass 33, wherein the mullion 51, the upper sash mullion 52, the side sash mullion 54 and the lower sash mullion 53 are sequentially connected end to end and enclose to form an installation space, the glass 33 is installed in the installation space, the upper sash mullion 52 is slidably connected with the upper frame 11, and the lower sash mullion 53 is slidably connected with the lower frame 12.

Specifically, mullion 51, fan upper side mullion 52, fan side mullion 54 and fan lower side mullion 53 are sequentially connected end to end and enclose to form a quadrangular frame structure, the frame structure is provided with an installation space for installing glass 33, the glass 33 generally adopts hollow toughened glass 33, and the insides of the mullion 51, the fan upper side mullion 52, the fan side mullion 54 and the fan lower side mullion 53 are all provided with fixed pressing lines 311 for limiting and fixing the glass 33, and sealant and rubber bars are arranged between the fixed pressing lines 311 and the glass 33, so that the installation tightness of the glass 33 is ensured, and the glass 33 is protected. The outer sides of the upper stile 52 and the lower stile 53 are provided with sliding parts 521 matched with the sliding rails, so as to realize the sliding connection with the upper frame 11 and the lower frame 12.

It should be noted that, the sliding rails herein all adopt a hollow double-wall thick supporting structure, so as to increase the supporting strength, and facilitate the installation of the siliconized wool tops on the upper stile 52 and the lower stile 53 of the fan to form the sealing surfaces.

Optionally, referring to fig. 2, fig. 6 and fig. 7, the movable door leaf 50 further includes a connecting member 55 for connecting the mullion 51, the upper sash mullion 52, the side sash mullion 54 and the lower sash mullion 53, where the connecting member 55 is substantially a right-angle or right-angle section, and generally a sash mullion group angle section is selected, that is, two ends of the mullion 51, the upper sash mullion 52, the side sash mullion 54 and the lower sash mullion 53 all adopt 45-degree cut angles, and the joint of two adjacent mullions is connected by the sash mullion group angle section to assemble the frame structure.

Further, referring to fig. 2 again, a first hook 151 is disposed on a side of the mullion 15 facing the mullion 51, a second hook 511 is disposed on a side of the mullion 51 facing the mullion 15, and the second hook 511 is engaged with the first hook 151 when the movable door 50 is closed. The first and second hooking portions 151 and 511 are disposed such that the contact surfaces of the mullion 15 and the mullion 51 are hooked to each other to form a sealing effect, thereby restraining the sliding of the movable door 50.

Further, please refer to fig. 2 again, the mullion 51 adopts an outer buckle plate 513 manner, the outer buckle plate 513 is connected with the mullion 51 in a buckling manner, the outer buckle plate 513 and the mullion 51 enclose to form a cavity, and the sliding member 521 is installed at the top or the bottom in the cavity, so that when the mullion 51 is assembled, the sliding member 521 at the top or the fixed part can be installed first, and then the outer buckle plate 513 is assembled, so that the installation of the sliding member 521 can be facilitated. And the joint of the mullion 51 and the outer buckle 513 is further provided with a heat insulation rubber strip 515 to realize the effect of a heat insulation profile.

Referring to fig. 6, in an embodiment of the present invention, a handle portion 153 is disposed on a side of the mullion 15 opposite to the movable door leaf 50, and a handle portion 153 is disposed on a side of the mullion 51 opposite to the fixed door leaf 30, so as to facilitate the push-pull operation of the movable door leaf 50.

Specifically, the handle portion 153 is substantially rib-shaped, and the outer contour of the cross section thereof is substantially arc-shaped, and the handle portion 153 is long and is vertically disposed on the side surface of the mullion 15 and the mullion 51. The arrangement of the handle 153 can facilitate the push-pull operation of the movable door leaf 50, and can also play a role in strengthening stability, so that the wind pressure resistance and deformation capacity of the door leaf are increased, and the whole wind pressure resistance and deformation capacity of the sliding door 100 is increased.

Furthermore, the upper and lower ends of the handle 153 are provided with plastic plugs 1531 to plug the holes after the upper and lower ends are cut off, so that the shape is beautiful and the human body is not scratched when the handle slides.

Referring to fig. 2, a handle 541 is disposed on a side of the side stile 54 facing the room for controlling the movable door 50 to open or close relative to the fixed door 30. When the movable door 50 needs to be opened or closed, an external force is applied to the handle 541, and the handle 541 can control the movable door 50 to open or close relative to the fixed door 30 under the external force.

Referring to fig. 2 and 3, a sealing rubber strip 17 is disposed between the upper side of the fixed door leaf 30 and the upper frame 11, the upper side of the sealing rubber strip 17 abuts against the upper frame 11, and the lower side abuts against the upper side of the fixed door leaf 30; and/or, a sealing rubber strip 17 is arranged between the lower side surface of the fixed door leaf 30 and the lower frame 12, the upper side of the sealing rubber strip 17 is abutted against the lower side surface of the fixed door leaf 30, and the lower side is abutted against the lower frame 12.

Specifically, the fixed door leaf 30 includes a fixed frame 31 and a glass 33 installed in the fixed frame 31, the fixed frame 31 is a quadrilateral frame structure and is used for assembling the fixed glass 33, the inner sides of the fixed frame 31 are both provided with a fixed pressing line 311 for limiting the fixed glass 33, and a sealant and a rubber bar are arranged between the fixed pressing line 311 and the glass 33, so as to ensure the sealing performance of the installation of the glass 33, and further protect the glass 33. Here, the sealing rubber strip 17 is an elastic rubber strip, and may be disposed between the fixed frame 31 and the upper frame 11, between the fixed frame 31 and the lower frame 12, or between the fixed frame 31 and the upper frame 11 and between the fixed frame 12 and the lower frame 12. During the assembly, place joint strip 17 between fixed frame 31 and top frame 11 to place joint strip 17 between fixed frame 31 and lower frame 12, then adopt self-tapping screw with fixed frame 31 and top frame 11 and lower frame 12 fixed connection, and compress tightly joint strip 17, with the better leakproofness between fixed door leaf 30 and door frame 10 of realization.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. The double-track three-leaf sliding door is characterized by comprising a door frame, a fixed door leaf and two movable door leaves, wherein the fixed door leaf and the two movable door leaves are arranged in the door frame in a staggered and parallel mode, the fixed door leaf is fixedly connected with the door frame, the two movable door leaves are both in sliding connection with the door frame, and the two movable door leaves can be opened or closed relative to the fixed door leaf when sliding along the door frame.

2. The double-rail three-leaf sliding door according to claim 1, wherein the door frame comprises an upper frame, a lower frame, a left frame, a right frame and a middle vertical frame, the upper frame, the left frame, the lower frame and the right frame are sequentially connected end to end and are fixed on a wall, two ends of the middle vertical frame are respectively fixed on the upper frame and the lower frame, the periphery of the fixed door leaf is respectively connected with the left frame, the upper frame, the lower frame and the middle vertical frame, and the upper side surface and the lower side surface of each movable door leaf are respectively connected with the upper frame and the lower frame in a sliding manner.

3. The dual-rail three-sash sliding door according to claim 2, wherein the upper frame and the lower frame are provided with two sliding rails, the two sliding rails are provided on the outdoor side of the middle mullion, and the two sliding rails are arranged in parallel;

the upper side and the lower side of the two movable door leaves are both provided with a sliding piece;

the sliding part is connected with the sliding rail in a sliding manner.

4. The dual-rail three-sash sliding door according to claim 3, wherein the second slide rail comprises a first slide rail and a second slide rail, the first slide rail is disposed between the middle mullion and the second slide rail, at least one end of the first slide rail is provided with an abdicating notch for rainwater to pass through, and the lower frame is provided with a drainage channel between the first slide rail and the second slide rail.

5. The dual-rail three-sash sliding door according to claim 4, wherein the lower frame has a receiving cavity, a first drainage hole communicating with the receiving cavity is formed on an upper side surface of the lower frame between the first slide rail and the second slide rail, a second drainage hole communicating with the receiving cavity is formed on a side wall of the lower frame, and the first drainage hole, the receiving cavity and the second drainage hole form the drainage channel.

6. The double-rail three-sash sliding door according to claim 3, wherein a sealing block is convexly provided on the upper side surface of the lower frame, and the sealing block is disposed between the two sliding rails; and/or the presence of a gas in the atmosphere,

go up the protruding sealed piece that is equipped with of downside of frame, sealed piece sets up in two between the slide rail for prevent indoor outer air flow or rainwater entering.

7. The double-track three-sash sliding door according to claim 2, wherein each movable door leaf comprises a mullion, an upper sash mullion, a side sash mullion, a lower sash mullion and glass, the mullion, the upper sash mullion, the side sash mullion and the lower sash mullion are sequentially connected end to end and enclose to form an installation space, the glass is installed in the installation space, the upper sash mullion is slidably connected with the upper frame, and the lower sash mullion is slidably connected with the lower frame.

8. The dual-rail three-sash sliding door according to claim 7, wherein a first hooking portion is disposed on a side of the mullion facing the mullion, and a second hooking portion is disposed on a side of the mullion facing the mullion and engaged with the first hooking portion when the movable door leaf is closed.

9. The dual-rail three-sash sliding door according to claim 7, wherein a handle portion is provided on a side of said mullion opposite to said movable door leaf, and a handle portion is provided on a side of said mullion opposite to said fixed door leaf for facilitating the sliding operation of said movable door leaf; and/or the presence of a gas in the gas,

and a handle part is arranged on one side of the sash side stile facing the indoor space and is used for controlling the movable door leaf to open or close relative to the fixed door leaf.

10. The double-rail three-leaf sliding door according to any one of claims 2 to 9, wherein the fixed door leaf comprises a fixed frame and glass installed in the fixed frame, a sealing rubber strip is arranged between an upper side face of the fixed frame and the upper frame, an upper side of the sealing rubber strip abuts against the upper frame, and a lower side of the sealing rubber strip abuts against an upper side face of the fixed frame; and/or the presence of a gas in the atmosphere,

the downside of fixed frame with be provided with joint strip between the lower frame, joint strip's upside butt in the downside of fixed frame, and downside butt in the lower frame.

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