CN112727321B

CN112727321B - Folding door

Info

Publication number: CN112727321B
Application number: CN202011613295.1A
Authority: CN
Inventors: 陈翠红
Original assignee: Monian Guangdong Technology Co ltd
Current assignee: Monian Guangdong Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-11-08
Anticipated expiration: 2040-12-30
Also published as: CN112727321A

Abstract

The invention discloses a folding door, which comprises a door frame and a door panel assembly arranged on the door frame, wherein the door panel assembly is formed by splicing a plurality of unit doors, each unit door is arranged on the door frame in a sliding manner, and a folding and furling mechanism which is used for folding and furling the unit doors and reaches one side of the door frame is arranged between the unit doors and the door frame; the folding and folding mechanism comprises a guide mechanism which is arranged between the door frame and the unit door and is used for guiding the unit door to move to one side of the door frame, wherein one side of the unit door is rotatably connected to the guide mechanism, and the other side of the unit door is provided with a sliding buckling mechanism which is used for enabling the unit door to be buckled on the door frame in a sliding mode. The folding door can be suitable for a door with a very large width, and has the advantages of small rotating radius, small occupied space, very convenient use and high flexibility in the door opening process.

Description

Folding door

Technical Field

The invention relates to the technical field of doors and windows, in particular to a folding door.

Background

In people's life, various doors such as double-opening doors, single-opening doors, sliding doors, rolling doors, folding doors and sliding doors are seen everywhere, different types of doors are used in different places, and in markets, office buildings or factory workshops, the doors are generally made to be very wide and large in order to facilitate goods or personnel to enter and exit. Market and office building generally adopt two glass doors that open, and the workshop of mill generally adopts two gold doors that open and shut, because the width of these doors is very wide, so also make very wide with the door leaf, this just leads to opening the door or the in-process of closing the door extremely inconvenient, because the door leaf width is big, at the in-process that opens the door, radius of rotation is big, and occupation space is great.

Disclosure of Invention

The invention aims to overcome the existing problems and provide a folding door which can be suitable for a door with a very large width, and has the advantages of small rotation radius, small occupied space, very convenient use and high flexibility in the door opening process.

The purpose of the invention is realized by the following technical scheme:

a folding door comprises a door frame and a door plate assembly arranged on the door frame, wherein the door plate assembly is formed by splicing a plurality of unit doors, each unit door is arranged on the door frame in a sliding manner, and a folding and furling mechanism which is used for folding and furling the unit doors and reaches one side of the door frame is arranged between the unit doors and the door frame; the folding and folding mechanism comprises a guide mechanism which is arranged between the door frame and the unit door and is used for guiding the unit door to move to one side of the door frame, wherein one side of the unit door is rotatably connected to the guide mechanism, and the other side of the unit door is provided with a sliding buckling mechanism which is used for enabling the unit door to be buckled on the door frame in a sliding mode.

The working principle of the folding door is as follows:

when opening the door, exert an external force to the unit door for one of them side of unit door separates with the door frame under the effect of slip lock mechanism, and during the separation, the unit door rotates round the other side of unit door, thereby opens the unit door, and under guide mechanism's effect, the unit door that opens also can slide on the door frame, opens a plurality of unit door, and removes this unit door to door frame one side, can realize folding of unit door and draw in. When the unit door is closed, the unit door is buckled on the door frame through the sliding buckling odd mechanism, the closing of the unit door is realized, and the closed unit door can also slide on the door frame under the action of the guide mechanism and the sliding buckling mechanism, so that the position of the unit door is conveniently adjusted, and the flexible adjustment of the opening area and the position of the door is realized.

In a preferred embodiment of the present invention, the guiding mechanism includes two guide rails respectively disposed at upper and lower ends of the door frame, and a sliding member disposed on the unit door and slidably engaged with the guide rails; the guide rail is provided with a first guide groove, the first guide groove extends along the width direction of the door frame, the opening of the first guide groove positioned on the upper end guide rail faces downwards, and the opening of the first guide groove positioned on the lower end guide rail faces upwards; the sliding part is two first rolling wheels arranged at the upper end and the lower end of the unit door, the two first rolling wheels are vertically arranged on one side of the unit door, and the two first rolling wheels are positioned on the same axis and are respectively in sliding fit with the upper first guide groove and the lower first guide groove. Through setting up above-mentioned structure, not only can realize the sliding guide function of unit door on the door frame, can also realize that the unit door is rotating round first rolling wheel, realize opening folding function of unit door.

Preferably, the sliding buckling mechanism comprises a second guide groove arranged on the side surface of the guide rail, a second rolling wheel arranged on the unit door and matched with the second guide groove in a sliding manner, a buckling piece arranged at the tail end of the second rolling wheel, and a sliding buckling groove arranged on the inner side of the second guide groove and matched with the buckling piece; the sliding buckling groove is arranged in parallel with the second guide groove and is communicated with the second guide groove. Through setting up slip lock mechanism, can make the second wheel that rolls and the cooperation of second guide way on the one hand, guarantee unit door steady motion on the guide rail, on the other hand, through slip lock mechanism with one side and the separation of guide rail of unit door for the unit door can rotate round the axis of first wheel that rolls, realizes the folding (opening) function of unit door.

Preferably, the fastener is a ball-type fastener, the ball-type fastener is composed of a plurality of elastic arc-shaped pieces, and the elastic arc-shaped pieces are uniformly distributed along the circumferential direction; the diameter of the spherical fastener is larger than that of the second rolling wheel; the height of the sliding buckling groove is greater than that of the second guide groove. Adopt above-mentioned mechanism, in the lock in-process, the ball-type fastener is at first through the extrusion of second guide way, the inside shrink of elasticity arc piece, ball-type fastener diameter diminishes, enter into the slip lock inslot along the second guide way, the elasticity arc piece recovers, ball-type fastener is mutually supported with the slip lock groove, the lock is in the slip lock inslot, realize the lock function, and on the same principle, can be with ball-type fastener and slip lock groove alternate segregation, realize the separation function, through the structure, make the unit door not only can the lock on the guide rail, can also slide on the guide rail, therefore, can be according to the nimble width of adjusting unit door's position and gate opening of user demand.

Furthermore, a guide separation plate for guiding the spherical buckling piece to be automatically separated from the sliding buckling groove is arranged at one end, close to the spherical buckling piece, of the guide rail, and the guide separation plate and the guide rail are arranged at an obtuse angle. Through setting up the guide separator plate, when actuating mechanism drive unit door towards installing guide separator plate one side motion, when the unit door arrives the position of motion guide separator plate, under the direction of guide separator plate, the ball-type buckling piece is followed and is slided the separation of buckling groove, and the unit door rotates round the axis of first roller to realize the automatic folding function of unit door.

Preferably, the lower end of the door frame is provided with a mounting groove, a locking mechanism for locking the unit doors on the door frame is arranged in the mounting groove, the locking mechanism comprises a locking pin vertically arranged between each unit door and the mounting groove and a locking driving mechanism for driving the locking pin to move up and down, wherein a locking block is arranged at one side of the lower end of each unit door close to the buckling piece, a locking hole in sliding fit with the locking pin is formed in the locking block, the lower end of the locking pin penetrates through the door frame and extends into the mounting groove, and the locking driving mechanism comprises a rotating shaft rotatably arranged on the mounting groove, a cam arranged on the rotating shaft and used for driving the locking pin to move up and down and a driving piece used for driving the rotating shaft to rotate; the cams correspond to the locking pins in one-to-one mode. Through the arrangement of the mechanism, the locking driving mechanism drives the rotating shaft to move so as to drive the cam to rotate, and the locking pin can be driven to move up and down on the door frame due to the eccentric motion of the cam; when the extreme far end of the cam moves to the highest point of the upper end, the locking pin is driven to move upwards to the locking hole, so that the locking function of the unit door is realized, and the unit door is prevented from moving on the guide rail; when the cam and the far end move to the lowest point of the lower end, the locking pin is driven to move downwards and is separated from the locking hole, so that the unit door can move on the guide rail.

Preferably, the driving member is a rocking handle arranged at one end of the door frame, and the rocking handle is connected with a rotating shaft extending out of the door frame. Through setting up the rocking handle, wave the rotation that the pivot can be realized to the rocking handle, and then realize the locking function of fitting pin.

Preferably, a plurality of supporting seats for supporting the rotating shaft are arranged on the mounting groove, and the supporting seats are distributed along the axis of the rotating shaft. Because the door frame width of folding door is great, the width that leads to the pivot to span is big, can play fine supporting role to the pivot through setting up the supporting seat, improves the stability of pivot motion simultaneously.

Preferably, the unit door is provided with a handle, which is beneficial to facilitating the buckling and the opening of the unit door through the handle.

Preferably, the upper end and the lower end of the unit door are both provided with a fixing plate, the second rolling wheel is installed on the inner side face of the fixing plate, and the locking block is arranged on the outer side face of the fixing plate. Through setting up the fixed plate, the second of being convenient for on the one hand rolls the installation of wheel and latch segment, and on the other hand, when the unit door lock was on the guide rail, the fixed plate can cover the guide rail for the unit door can be installed between upper and lower guide rail, makes the structure become compacter.

Compared with the prior art, the invention has the following beneficial effects:

1. the folding door provided by the invention is suitable for doors with very large width, such as gates in shopping malls, office buildings or factory workshops, by arranging the plurality of unit doors, and meanwhile, the width of the unit doors is small, so that the rotating radius is small in the door opening or closing process, the space is not occupied, and the folding door is very convenient to use.

2. According to the folding door, the guide mechanism and the sliding buckling mechanism are arranged, so that the unit door can be moved when the unit door is opened or closed, the position of the unit door is changed, and the opening area of the unit door is adjusted.

Drawings

Fig. 1-2 are schematic structural views of a first embodiment of a folding door in the present invention, wherein fig. 1 is a perspective view, and fig. 2 is a front view.

Fig. 3 is a sectional view taken along the direction H-H in fig. 2.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic perspective view of the cover plate of fig. 1 without the cover plate.

Fig. 6 is a schematic perspective view of the cover plate of fig. 2 without the cover plate.

Fig. 7 is a partial enlarged view of fig. 6 at B.

Fig. 8 is a schematic perspective view of one of the unit doors of the present invention performing a folding and folding movement on the guide rail.

Fig. 9 is a partial enlarged view at C in fig. 8.

Fig. 10-11 are schematic structural views illustrating a unit door of the present invention when being fastened on a guide rail, wherein fig. 10 is a perspective view, and fig. 11 is a left side view.

Fig. 12 is a partial enlarged view of fig. 10 at D.

Fig. 13 is a partial enlarged view at E in fig. 11.

Fig. 14 is a partial enlarged view at F in fig. 11.

Fig. 15 is a schematic perspective view of the folding and folding movement of two unit doors on the guide rail according to the present invention.

Fig. 16-17 are schematic structural views of the unit door of the present invention, wherein fig. 16 is a perspective view, and fig. 17 is a perspective view from another viewing angle direction.

Fig. 18 is a partial enlarged view at G in fig. 17.

Detailed Description

In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1

Referring to fig. 1-3 and 15, the present embodiment discloses a folding door, which can be applied to very wide doors, and includes a door frame 1 and a door panel assembly disposed on the door frame 1, where the door panel assembly is formed by splicing 6 unit doors 2, and each unit door 2 is slidably disposed on the door frame 1, and a folding mechanism for folding and folding the unit doors 2 to one side of the door frame 1 is disposed between the unit doors 2 and the door frame 1; the folding and furling mechanism comprises a guide mechanism which is arranged between the door frame 1 and the unit door 2 and is used for guiding the unit door 2 to move towards one side of the door frame 1, wherein one side of the unit door 2 is rotatably connected to the guide mechanism, and the other side of the unit door 2 is provided with a sliding buckling mechanism which is used for enabling the unit door 2 to be buckled on the door frame 1 in a sliding manner.

The folding door in this embodiment is through setting up a plurality of unit door 2 for this folding door can be fit for the very big door of width, for example the gate in market, office building or the factory workshop, and simultaneously, the width of unit door 2 is less, makes at the in-process that opens the door or close the door, and turning radius is less, occupation space not, and it is very convenient to use. Through setting up guiding mechanism and slip lock mechanism, make cell door 2 when the state of opening or closing, can both remove cell door 2, change cell door 2's position, thereby realize the adjustment of cell door 2 opening area, because market, office building or factory workshop, the people of business turn over is also different at different time quantums, when needs transport goods, it also has the demand to open the width to the door, area and position through adjusting the door and opening, greatly made things convenient for the configuration to the user demand, can make nimble adjustment according to different situation, the flexibility that the folding door used has been improved.

Referring to fig. 8 to 16, the guide mechanism includes two guide rails 3 respectively disposed at upper and lower ends of the door frame 1, and a sliding member disposed on the unit door 2 and slidably engaged with the guide rails 3; the guide rail 3 is provided with a first guide groove 3-1, the first guide groove 3-1 extends along the width direction of the door frame 1, the opening of the first guide groove 3-1 positioned on the upper end guide rail 3 faces downwards, and the opening of the first guide groove 3-1 positioned on the lower end guide rail 3 faces upwards; the sliding part is two first rolling wheels 4 arranged at the upper end and the lower end of the unit door 2, the two first rolling wheels 4 are vertically arranged on one side of the unit door 2, and the two first rolling wheels 4 are positioned on the same axis and are respectively in sliding fit with the upper first guide groove 3-1 and the lower first guide groove 3-1. Through setting up above-mentioned structure, not only can realize the slip direction function of unit door 2 on door frame 1, can also realize that unit door 2 is rotating round first rolling wheel 4, realize opening folding function of unit door 2.

Referring to fig. 8 to 18, the sliding fastening mechanism includes a second guide groove 3-2 disposed on a side surface of the guide rail 3, a second rolling wheel 5 disposed on the unit door 2 and slidably engaged with the second guide groove 3-2, a fastener 6 disposed at a distal end of the second rolling wheel 5, and a sliding fastening groove 3-3 disposed inside the second guide groove 3-2 and engaged with the fastener 6; the sliding buckling groove 3-3 is parallel to the second guide groove 3-2 and is communicated with the second guide groove 3-2. Through setting up the slip lock mechanism, can make second wheel 5 and second guide way 3-2 cooperation on the one hand, guarantee unit door 2 steady motion on guide rail 3, on the other hand, through slip lock mechanism with one side and the separation of guide rail 3 of unit door 2 for unit door 2 can rotate around the axis of first wheel 4 that rolls, realizes the folding (opening) function of unit door 2.

Referring to fig. 17-18, said fastener 6 is a ball-type fastener comprised of a plurality of elastic arcuate panels 6-1, said plurality of elastic arcuate panels 6-1 being uniformly distributed circumferentially about the fastener; wherein the diameter of the ball-type fastener is larger than that of the second rolling wheel 5; the height of the sliding buckling groove 3-3 is larger than that of the second guide groove 3-2. By adopting the mechanism, in the buckling process, the spherical buckling piece is firstly extruded by the second guide groove 3-2, the elastic arc-shaped piece 6-1 is inwards contracted, the diameter of the spherical buckling piece is reduced, the spherical buckling piece enters the sliding buckling groove 3-3 along the second guide groove 3-2, the elastic arc-shaped piece 6-1 is restored, the spherical buckling piece and the sliding buckling groove 3-3 are mutually matched and buckled in the sliding buckling groove 3-3 to realize the buckling function, and similarly, the spherical buckling piece and the sliding buckling groove 3-3 can be mutually separated to realize the separation function, and the unit door 2 can be buckled on the guide rail 3 and can also slide on the guide rail 3 through the structure, so that the position of the unit door 2 and the opening width of the door can be flexibly adjusted according to the use requirements.

Referring to fig. 9, a guiding separation plate 7 for guiding the ball-type fasteners to automatically separate from the sliding fastening grooves 3-3 is disposed at one end of the guiding rail 3 close to the ball-type fasteners, and the guiding separation plate 7 is disposed at an obtuse angle with respect to the guiding rail 3. By arranging the guide separation plate 7, when the driving mechanism drives the unit door 2 to move towards the side provided with the guide separation plate 7, and the unit door 2 is at the position of the movement guide separation plate 7, under the guide of the guide separation plate 7, the spherical fasteners are separated from the sliding fastening grooves 3-3, and the unit door 2 rotates around the axis of the first rolling wheel 4, so that the automatic folding function of the unit door 2 is realized.

Referring to fig. 6, the door frame 1 is provided with a chamfer on a side adjacent to the guide separating plate 7, which allows the unit door 2 to be prevented from colliding with the door frame 1 during the folding process.

Referring to fig. 2 to 7, a mounting groove 1-1 is formed at the lower end of the door frame 1, a locking mechanism 8 for locking the unit doors 2 to the door frame 1 is arranged in the mounting groove 1-1, the locking mechanism 8 includes a locking pin 8-1 vertically arranged between each unit door 2 and the mounting groove 1-1 and a locking driving mechanism for driving the locking pin 8-1 to move up and down, wherein a locking block 8-2 is arranged at one side of the lower end of each unit door 2 close to the fastening member 6, a locking hole 8-21 in sliding fit with the locking pin 8-1 is formed in the locking block 8-2, the lower end of the locking pin 8-1 passes through the door frame 1 and extends into the mounting groove 1-1, and the locking driving mechanism includes a rotating shaft 8-3 rotatably arranged on the mounting groove 1-1, a cam 8-4 arranged on the rotating shaft 8-3 for driving the locking pin 8-1 to move up and down, and a driving member for driving the rotating shaft 8-3 to rotate; the cams 8-4 correspond to the locking pins 8-1 in position one to one. By arranging the mechanism, the locking driving mechanism drives the rotating shaft 8-3 to move so as to drive the cam 8-4 to rotate, and the cam 8-4 can drive the locking pin 8-1 to move up and down on the doorframe 1 due to the eccentric motion of the cam 8-4; when the extreme far end of the cam 8-4 moves to the highest point of the upper end, the locking pin 8-1 is driven to move upwards to the locking hole 8-21, so that the locking function of the unit door 2 is realized, and the unit door 2 is prevented from moving on the guide rail 3; when the cam 8-4 moves to the lowest point of the lower end, the locking pin 8-1 is driven to move downwards and is separated from the locking hole 8-21, so that the unit door 2 can move on the guide rail 3.

Referring to fig. 2-7, the door frame 1 is provided with a T-shaped through hole 1-2 at a position corresponding to the locking pin 8-1, a T-shaped guide sleeve 8-5 is provided on the T-shaped through hole 1-2, the locking pin 8-1 is in sliding fit with the T-shaped guide sleeve 8-5, a limit step portion 8-11 is provided at the middle of the locking pin 8-1, and the limit step portion 8-11 is used for abutting against the upper end of the T-shaped guide sleeve 8-5. By arranging the limiting step part 8-11, the locking pin 8-1 is tightly propped against the T-shaped guide sleeve 8-5 under the action of gravity, so that excessive abrasion between the locking pin 8-1 and the cam 8-4 is effectively prevented.

Furthermore, the lower end of the locking hole 8-21 is provided with a chamfer, and the chamfer is beneficial to enabling the locking pin 8-1 to enter the locking hole 8-21 more easily when moving upwards.

Referring to fig. 7, the driving member is a rocking handle 8-6 disposed at one end of the door frame 1, and the rocking handle 8-6 is connected to a rotating shaft 8-3 extending out of the door frame 1. Through the arrangement of the rocking handle 8-6, the rotation of the rotating shaft 8-3 can be realized by rocking the rocking handle 8-6, and further the locking function of the locking pin 8-1 is realized.

Referring to fig. 6-7, 6 supporting seats 8-7 for supporting the rotating shaft 8-3 are disposed on the mounting groove 1-1, the supporting seats 8-7 are distributed along the axis of the rotating shaft 8-3, and each supporting seat is adjacent to each cam. The width of the door frame 1 of the folding door is large, so that the spanning width of the rotating shaft 8-3 is large, the supporting seat 8-7 is arranged to play a good supporting role for the rotating shaft 8-3, and meanwhile, the movement stability of the rotating shaft 8-3 is improved.

Referring to fig. 1 to 2, a cover plate 9 for sealing the installation groove 1-1 is provided at a lower end of the doorframe 1. The locking mechanism has the advantages that impurities such as dust can be effectively prevented from entering the mounting groove 1-1, and the using effect and the service life of the locking mechanism 8 are influenced.

Referring to fig. 16, the handle 11 is disposed on the unit door 2, and the handle 11 is disposed on a side close to the fastener 6, which is advantageous in that the fastening and opening of the unit door 2 can be facilitated by the handle 11.

Referring to fig. 16-18, the unit door 2 is composed of a door frame and door panels disposed on two sides of the door frame, fixing plates 10 are disposed on both upper and lower ends of the door frame, the fixing plates 10 are located on the same plane as the door panels located on the outer sides, the second rolling wheels 5 are mounted on the inner side surfaces of the fixing plates 10, and the locking blocks 8-2 are disposed on the outer side surfaces of the fixing plates 10. By arranging the fixing plate 10, on one hand, the installation of the second rolling wheels 5 and the locking blocks 8-2 is facilitated, and on the other hand, when the unit door 2 is buckled on the guide rail 3, the fixing plate 10 can cover the guide rail 3, so that the unit door 2 can be installed between the upper guide rail 3 and the lower guide rail 3, and the structure becomes more compact.

Referring to fig. 16 to 18, the fixed plate 10 is provided with an avoidance section 10-1 at a side close to the first rolling wheel 4, and the avoidance section 10-1 can prevent the unit door 2 from interfering with the guide rail 3 during the opening process.

Referring to fig. 1 to 3 and 15, the folding door operates on the following principle:

when opening the door, exert an external force to unit door 2 for one of them side of unit door 2 separates with door frame 1 under the effect of slip lock mechanism, and during the separation, unit door 2 rotates round the other side of unit door 2, thereby opens unit door 2, and under guiding mechanism's effect, the unit door 2 of opening also can slide on door frame 1, opens a plurality of unit door 2, and moves this unit door 2 to door frame 1 one side, can realize folding of unit door 2 and draw in. When unit door 2 is closed, unit door 2 lock is on door frame 1 through the odd mechanism of slip lock, realizes closing of unit door 2, under guiding mechanism and slip lock mechanism's effect, closed unit door 2 also can slide on door frame 1 to the convenience is adjusted the position of unit door 2, and then realizes opening the nimble adjustment of area and position to the door.

Example 2

The other structures in this embodiment are the same as embodiment 1, except that: the quantity of unit door 2 can carry out corresponding adjustment according to the place, and the door of broad can set up more unit door 2.

Example 3

The other structures in this embodiment are the same as embodiment 1, except that: the driving piece is a driving motor, and the output end of the driving motor is connected with the rotating shaft 8-3. By setting the driving motor, the automatic locking function of the unit door 2 can be realized.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims

1. A folding door comprises a door frame and a door plate assembly arranged on the door frame, wherein the door plate assembly is formed by splicing a plurality of unit doors, and each unit door is arranged on the door frame in a sliding manner; the folding and furling mechanism comprises a guide mechanism which is arranged between the door frame and the unit door and is used for guiding the unit door to move to one side of the door frame, wherein one side of the unit door is rotationally connected to the guide mechanism, and the other side of the unit door is provided with a sliding buckling mechanism which is used for buckling the unit door on the door frame in a sliding way;

the guide mechanism comprises two guide rails respectively arranged at the upper end and the lower end of the door frame and a sliding part arranged on the unit door and matched with the guide rails in a sliding manner; the guide rail is provided with a first guide groove, the first guide groove extends along the width direction of the door frame, the opening of the first guide groove positioned on the upper end guide rail faces downwards, and the opening of the first guide groove positioned on the lower end guide rail faces upwards; the sliding part is two first rolling wheels arranged at the upper end and the lower end of the unit door, the two first rolling wheels are vertically arranged on one side of the unit door, and the two first rolling wheels are positioned on the same axis and are respectively in sliding fit with the upper first guide groove and the lower first guide groove;

the sliding buckling mechanism comprises a second guide groove arranged on the side surface of the guide rail, a second rolling wheel arranged on the unit door and in sliding fit with the second guide groove, a buckling piece arranged at the tail end of the second rolling wheel and a sliding buckling groove arranged on the inner side of the second guide groove and matched with the buckling piece; the sliding buckling groove is arranged in parallel with the second guide groove and is communicated with the second guide groove.

2. The foldable door of claim 1, wherein the fasteners are ball-type fasteners comprising a plurality of resilient flexible arcs, the flexible arcs being circumferentially distributed about the flexible arcs; wherein the diameter of the ball-type fastener is larger than that of the second rolling wheel; the height of the sliding buckling groove is greater than that of the second guide groove.

3. The foldable door as claimed in claim 2, wherein said rail has a guide separation plate at an end thereof adjacent to the ball fasteners for guiding the ball fasteners to automatically separate from the slide fastener slots, the guide separation plate being disposed at an obtuse angle to said rail.

4. The folding door of claim 1, wherein the lower end of the door frame is provided with a mounting groove, the mounting groove is provided with a locking mechanism for locking the unit door to the door frame, the locking mechanism comprises a locking pin vertically arranged between each unit door and the mounting groove and a locking driving mechanism for driving the locking pin to move up and down, wherein the lower end of the unit door is provided with a locking block at a side close to the fastener, the locking block is provided with a locking hole in sliding fit with the locking pin, the lower end of the locking pin passes through the door frame and extends into the mounting groove, and the locking driving mechanism comprises a rotating shaft rotatably arranged on the mounting groove, a cam arranged on the rotating shaft for driving the locking pin to move up and down and a driving member for driving the rotating shaft to rotate; the cams correspond to the locking pins in one-to-one mode.

5. The folding door of claim 4, wherein said driving member is a rocking handle disposed at one end of said door frame, said rocking handle being connected to a shaft extending out of said door frame.

6. The folding door as claimed in claim 4, wherein said mounting groove is provided with a plurality of supporting seats for supporting said rotary shaft, and said plurality of supporting seats are distributed along an axis of said rotary shaft.

7. The folding door of claim 1, wherein said unit door is provided with a handle.

8. The folding door as claimed in claim 4, wherein fixing plates are provided at upper and lower ends of the unit door, the second rolling wheels are mounted on inner side surfaces of the fixing plates, and the locking blocks are provided on outer side surfaces of the fixing plates.