EP0794310B1 - Folding wing door - Google Patents

Abstract

The door (1) has a number of folding leaves (10,12,13,15) joined in pairs by links (11,14). The linear drive system (2) opens and closes the door leaves which are locked against a forced opening by an active, controlled locking system (25,26). The locking system is mechanically connected to the linear drive system both of which are on the top of the door. The first folding leaves (10,15) pivot on a fixed pivot axle (9,16). The second folding leaves (12,13) are pivotally connected to the first folding leaves by links. The linear drive system comprises a linear drive element (4) driven by a motor (5) and connected mechanically to the second folding leaves. The locking system each comprises a locking element swivelling on a fixed pivot axle and mechanically connected to the linear drive element.

Description

TECHNICAL AREA

The present invention relates to the field of automatic powered doors and gates. It affects one Folding wing door according to the preamble of claim 1.

Such a folding wing door is e.g. from the publication EP-A1-0 561 091 known.

STATE OF THE ART

Folding wing doors, where the door is in single, with each other pivotally connected folding wing is divided, which at Open to the side folded like an accordion and pushed together have been known for a long time. they draw is characterized by the fact that they are particularly large door openings take up significantly less space than doors with pure swinging wings or sliding doors. Basically you can such doors can be opened and closed by hand. On however, such manual operation requires a relatively large one Effort in terms of power and time, so that manually operated folding doors can only be used in special applications.

In contrast, folding wing doors with one are becoming increasingly widespread Power drive, especially if they - for example by means of of a proximity sensor - open and close automatically. Here, the space-saving are combined in an advantageous manner Installation with a quick and convenient way of working, so that such doors are even in areas with heavy traffic have proven.

For the power drive of such folding doors are in the Different drive systems have already been proposed in the past been. DE-A1-44 43 500, for example, discloses a folding door system with a motorized door drive, in which the outer wings, which can be rotated about a fixed axis of rotation (la, 2a) are driven directly in their axis of rotation, and directly from the drive motor (10) via a spur gear (10b), or via a rotating driven transmission element in the form of a chain. The inner wings attached to the outer wings are pivoted by means of folding joints are not driven themselves, but by the outside Wings when opening or closing in appropriate Sliding bearings moved and pivoted at the same time. A The folding wing or the door as a whole is not locked provided because of the direct rotary drive on the outer Wings and the spur gear an undesirable Pushing open the door by hand is at least difficult.

FR-A1-2 541 717 discloses a motor-driven one Folding wing door, in which, driven by a gearwheel, linear and counter-rotating racks both inner folding wings linearly shifted at their free edges and fold the pairs of wings at the same time. A locking of the wing is not provided, so that the door at least from one side by pressing firmly can be opened by hand in the area of the folding joints can. Another disadvantage is that when fully closed Door the wings of each pair of wings practically together cursed and therefore it because of the "blind spot" is likely to be difficult due to a linear thrust movement in Direction of the line of escape necessary for opening the door Initiate folding process.

For the folding wing door with the linear hinge drive according to the EP-A1-0 561 091 mentioned at the beginning becomes this blind spot overcome when opening the door in the area of Folded joints each have shoes (21) with a slide guide are provided, which are at the beginning of the linear thrust movement the folding process in the folding joints using appropriate means (21.7) initiate forcibly and safely. The guide shoes serve as locking elements when the door is closed, which is pushing open the door in the area of the Prevent folding joints. The disadvantage of this solution is that due to the fixed arrangement of the guide shoes on the door frame the tour is limited to a relatively short distance is not independent and unlocking the door can be made by the opening movement so that emergency opening of the door by hand is considerably more difficult becomes.

In DE-A1-38 43 174 is used to initiate the folding movement and to press the folding wing in the closed state of the Door a push-off or pressure finger used, which over a electrically controllable drag nut through the spindle drive is moved, which simultaneously moves the folding wings. Also this type of locking allows due to the spindle drive no independent opening by hand.

PRESENTATION OF THE INVENTION

It is therefore an object of the invention to have a folding wing door motor drive to indicate which in the closed state is automatically secured against unauthorized opening, in an emergency, however, can be opened by hand with little effort can be.

The task is for a folding door of the type mentioned Art solved by the entirety of the features of claim 1. The inventive design of the locking means pivotable about a fixed pivot axis Locking elements, it is possible in a simple manner Emergency, i.e. if the power drive fails, the locking to solve first and then the door without difficulty can be opened by hand.

Basically, the locking system can have a separate, have a drive independent of the actual drive of the door, and can be controlled separately, for example. The one with it associated additional effort in drive and control means and the associated higher susceptibility to failure, however avoided because, according to the invention, the locking system is mechanically coupled to the linear drive system, such that when the door is opened by the linear drive system the locking system unlocks the folding wing at the same time and locked when the door is closed.

A preferred embodiment of the invention stands out characterized in that the linear drive system and the locking system each on the top of the folding door are arranged so that the folding wing door comprises first folding wings, which are rotatable about a fixed axis of rotation, and second folding wing, which overlaps with the first folding wing Folding joints are pivotally connected, and that the linear Mechanical drive element with the second folding leaf is coupled such that the second folding wing at one linear movement of the linear drive element simultaneously perform a linear and pivoting movement. By this way the mechanical coupling results in a simple one reliable door mechanism that takes up little space and can be easily adapted to different applications.

Another preferred embodiment of the invention Folding wing door is characterized in that the linear Drive element band-shaped, in particular as a rope, belt or chain, is formed and the shape of a lengthways of the door extending closed loop, which at one end via a driven by the drive motor Drive wheel and at the other end runs over a deflection wheel, that for mechanical coupling between the linear Drive element and the second folding wings parallel to the linear Drive element guided and with the linear Drive element permanently connected carriage with one each a cam disc containing guide, as well as on the second folding wings are each provided rotary lever, which Rotary lever with one end on the assigned folding wing firmly attached and with the other end in the guide link the associated guide plate are guided, and that the guide links are designed such that the second Folding wing when opening the door first or when Finally, close the door by swinging it. Through the respective interaction of the arranged on the carriage Cam disc with its guiding backdrop and the am Folded wing-mounted rotary lever can be implemented the linear drive movement into the one necessary for opening Achieve pivoting movement, which in a particularly well-guided, soft movement of the folding wings results.

Another preferred embodiment of the folding wing door according to The invention is characterized in that for mechanical Coupling of linear drive element and locking element one driver each on the guide washers is attached, which when opening or closing the Door engages with a pivoted pivot lever comes and this pivots that the pivotal movement the pivot lever by means of a connecting rod on the Locking element is transmitted and that the guide links are designed so that when the door is opened in an idle stroke of the carriages or cams first the lock is released without moving the folding wings, and only then the pivoting movement of the second Folding wing is initiated, or that when closing the First the last pivoting movement of the second folding door is completed and only then in an idle stroke the carriage or cams performed the locking becomes. By decoupling the unlocking process and opening process or closing process and locking process can be a particularly cheap and flexible achieve adaptable opening and closing behavior of the door. Further embodiments result from the dependent claims.

BRIEF EXPLANATION OF THE FIGURES

Fig. 1

in der Frontalansicht ein bevorzugtes Ausführungsbeispiel einer Faltflügeltür nach der Erfindung mit symmetrischer Anordnung von zwei Faltflügelpaaren;

Fig. 2

den Querschnitt durch das Antriebssystem der Tür nach Fig. 1;

Fig. 3

aus der Draufsicht verschiedene Phasen beim Oeffnen einer Tür nach Fig. 1 (das Verriegelungssystem ist der Einfachheit halber hier nicht eingezeichnet);

Fig. 4

in einer Detailansicht das Verriegelungssystem für die rechte Türhälfte der Tür nach Fig. 1;

Fig. 5

in Querschnitt die Anordnung des Verriegelungssystems nach Fig. 4 im Kasten des Antriebssystems; und

Fig. 6

in der zu Fig. 3 vergleichbaren Draufsicht ein Ausführungsbeispiel für eine symmetrische Faltflügeltür nach der Erfindung, deren Türhälften jeweils drei zusammenhängende Faltflügel umfassen.

The invention will be explained in more detail below on the basis of exemplary embodiments in connection with the drawing. Show it

Fig. 1

in the front view of a preferred embodiment of a folding door according to the invention with a symmetrical arrangement of two pairs of folding wings;

Fig. 2

the cross section through the drive system of the door of FIG. 1;

Fig. 3

from the top view different phases when opening a door according to FIG. 1 (the locking system is not shown here for the sake of simplicity);

Fig. 4

in a detailed view the locking system for the right half of the door of Fig. 1;

Fig. 5

in cross section the arrangement of the locking system of Figure 4 in the box of the drive system. and

Fig. 6

in the plan view comparable to FIG. 3, an embodiment for a symmetrical folding wing door according to the invention, the door halves of which each comprise three connected folding wings.

WAYS OF CARRYING OUT THE INVENTION

1 is a preferred embodiment in the front view a folding wing door according to the invention with symmetrical Arrangement of two pairs of folding wings shown. The folding wing door 1 comprises four folding wings 10, 12, 13 and 15, of which two each, namely the folding wings 10 and 12 or the folding wings 13 and 15, a coherent pair form which by means of a hinge-like folding joint 11 or 14 is pivotally connected to one another. The first Folding wing, the left outer folding wing 10 and the right outer folding wings 15 are each about a fixed axis of rotation 9 or 16 rotatable. The second folding wing, the inner folding wing 12, 13, are on their free edge by means of appropriate guide rollers running in a rail (35 in FIG. 2; 41 in Fig. 4) guided linearly above and below. To the bottom guide a floor guide 17 is provided which is let into the floor 18 is. The upper guide takes place inside the box-like Drive system 2, which above the door across the whole door is arranged, and will be related later explained with Fig. 2.

The drive system 2 is designed as a linear drive. Within the drive system 2 runs from across to the door a drive motor 5 driven linear, band-shaped Drive element 4, which is preferably a rope or chain, is in particular also designed as a toothed belt and the shape one closed along the door Has loop that at one end via a drive motor 5 driven drive wheel 6 and at the other end over a deflection wheel 3 runs. The linear drive element 4 is with the inner (second) folding wings 12, 13 mechanically coupled, such that the inner folding wings 12, 13 at a linear movement of the linear drive element 4 simultaneously perform a linear and a pivoting movement.

The mechanical coupling between the linear drive element 4 and the inner folding wings 12, 13 takes place in parallel led to the linear drive element 4 and with the linear Drive element 4 fixedly connected carriages 7, 8. The left carriage 7 is in the example of FIG. 1 on the upper strand of the linear drive element attached, the right carriage 8 on the lower strand. The drive wheel 6 turns against clockwise, the left carriage 7 moves with it the upper strand to the left, the lower carriage with the lower strand, however, to the right. The folding wing door opens. When the door is closed, the drive wheel 6 rotates clockwise and the directions of movement of the carriages 7, 8 turn around.

In the lower area of the carriages 7, 8 there is one each the cam firmly connected, horizontally lying cam 19 and 20 arranged (see also Fig. 3) with an arcuate guide link 19a or 20a is. There is a rotary lever on each of the inner folding wings 12, 13 21 and 22 respectively. The rotary levers 21, 22 are with one end on lever axes 23, 24 of the associated folding wing firmly attached and have a guide role at the other end (32 in Fig. 2) with which they are in the guide link 19a or 20a of the associated guide disk 19 or 20 are performed. The guide links 19a, 20a are of this type trained that the inner folding wings 12, 13 at First open the door by simply swiveling it, before you then (while at the same time further Swivel) linearly outwards. Corresponding when closing the door in the reverse order inner sash with simultaneous swiveling inwards moved towards each other until the door in the last Movement section entirely through a pure swivel movement closes.

To lock the folding wing door 1 in the closed state is for both door halves 10, 12 and 13, 15 within the drive system 2 each have a locking system 25 or 26 provided, the preferred structure of which can be seen in FIG. 4 is. The locking system shown enlarged in FIG. 4 26 for the right half of the folding wing door 1 includes a locking element pivotable about a fixed pivot axis 49 48, which with the linear drive element 4 is mechanically coupled and when moving the on his Wheels 38, 39, 40 running carriage 8 between one Locking position (in Fig. 4 with solid lines shown) and an unlocking position (in Fig. 4th dash-dotted lines) is pivoted. The locking element 48 is preferably in the vicinity of the folding joint 14 arranged and engages in the locking position with a locking pin 54 through an elongated hole 56 in one Locking plate 55 (see also Fig. 5). Hereby it is reliably prevented that the closed folding wings 13, 15 by pushing in the particularly critical area of the Folding joint 14 can be opened without permission or unintentionally.

The mechanical coupling between the linear drive element 4 and the locking element 48 takes place on the Cam 8 arranged, already mentioned cam 20. On the cam 20 is a driver 44 with a side Pin 45 attached, which meshes with when opening the door a pivoted about the pivot axis 51 and with a link 46 equipped pivot lever 50 in engagement comes and pivots this. The pivoting movement of the Swing lever 50 is by means of one in two axes of rotation 52, 47th on the pivot lever 50 and on the locking element 48 rotatably articulated Connecting rod 53 on the locking element 48 transferred. The guide links 19a, 20a in the cams 19, 20 are parallel to the linear one Drive element 4 extending link section designed so that when the door is opened, the carriages 7, 8 or Cam 19, 20, the locking element first in an idle stroke Actuate 48 and thus release the lock without the folding wings 10, 12, 13, 15 being moved. First then if, in the further linear process, the Carriage 7, 8 the curved part of the guide link 19a, 20a takes over the leadership of the rotary levers 21, 22, the Pivotal movement of the second folding wing 12, 13 initiated. The other locking system 25 is for the locking system 26 performed in mirror image.

These sequential processes of unlocking and subsequent opening of the folding wing door are in Fig. 3 in the top view reproduced from above. The better overview are compared to the representation in FIG. 2 the carriages 7, 8 are shown offset from the door plane, and the locking systems 25, 26 not shown, to make the opening processes more visible. Fig. 3a shows the folding door from Fig. 1 in the closed and locked state. The carriage 7, 8, which means Carriers 7a and 8a attached to the linear drive element 4 are in their one end position in which they are with each other have a minimal distance. The folding wings 10, 12, 13, 15 are aligned with one another and form a continuous one closed door surface. Before opening the door is, according to Fig. 3b by the linear drive Carriage 7 or 8 after the already mentioned idle stroke move left or right. Since the rotary levers 21, 22 of the Folding wing 12, 13 in this phase in a linear drive element 4 parallel sections of the curved guide link 19a, 20a can be guided, the carriage 7, 8 can be moved in this phase without the folding wing 12, 13 can be taken. About that shown in Fig. 4 Locking mechanism can initially lock the door unlocked unhindered without the actual one Opening process begins. This unlocking can also can be easily done by hand if one Possibility is provided for the idle stroke by manual operation to achieve the linear drive element 4.

The carriages 7, 8 continue after unlocking outward, the curved section of the Guide slots 19a, 20a guide the rotary levers 21, 22nd and initiates a pivoting process of the folding wings 12, 13, the blind spot of the folding wings aligned with each other overcomes. After inserting the swivel movement, the Folding wing 12, 13 unhindered by the carriage 7, 8 can be moved outside, the wing pairs 10, 12 and 13, 15 and finally unfold the one shown in Fig. 3c Reach end position.

When closing the door, the process described reverses and locks the door: by moving the Carriages 7, 8 are turned inwards by guiding the rotary lever 21, 22 in the guide slots 19a, 20a the folding wings shifted inward while simultaneously pivoting after a last pivoting movement of the inner folding wings 12, 13 the folding wings are aligned one behind the other. It is then reached the state shown in Fig. 3b, in which the rotary levers 21, 22 in parallel to the linear drive element 4 extending backdrop section. At the Subsequent idle stroke of the cam disks 19, 20 (transition from FIG. 3b to FIG. 3a) the driver 44 engages (in FIG. 4) Coming into the scenery 46 with the pin 45 coming from the right of the pivot lever 50 and swings in from the dashed line drawn in with those drawn with solid lines Locking position. Via the connecting rod the locking element 48 is simultaneously counter to the Swiveled clockwise until the locking pin 54 in the slot 56 of the locking plate 55 pivots and the associated folding wing (13) locked.

2 is preferably in one elongated box housed, which consists of two complementary Hollow profiles 27 and 36 is formed, the one Hollow section 27 has a supporting function, while the other Hollow profile is mainly used for covering. Within the first hollow profile 27 are two superimposed parallel ones Guide rails 28, 29 arranged between which the Carriages 7 and 8 with their wheels 30, 31 and 38, 39, 40 are linear. Below the guide rails 28, 29 is a further guide rail 34 in parallel in the hollow profile 27 provided, in which the inner folding wings 12, 13 by means of the guide rollers 35 and 41 are guided linearly. The exemplary Carriage 7 shown comprises a double right-angled support bracket 33, on the top of the wheels 30, 31 are rotatably mounted, and the bottom in the horizontal Cam 19 with its driver 37 for actuation the lock passes. The carriage 7 is over the driver 7a firmly connected to the linear drive element 4. In the lower front part of the hollow profile 27 is - how shown in Fig. 5 - the locking mechanism with the arranged pivotable locking element 48, which with the locking pin 54 in the slot 56 in the locking plate 55 engages.

In the context of the invention, not only symmetrical folding wing doors can with 4 folding wings, but also symmetrical Folding wing doors with 6 or more folding wings, or asymmetrical Folding wing doors with e.g. only 2 or 3 folding wings realized become. 6 is a further embodiment in a representation comparable to FIG. 3, a folding wing door 57 with a total of 6 symmetrically arranged folding wings 68, 70, 72 and 73, 75, 77. The outer folding wings 68, 77 are in turn rotatable about fixed axes of rotation 67 and 78, respectively. The middle folding wings 70, 75 are with the outer Folding wings 68, 77 connected via first folding joints 69, 76, while the inner folding wings (72, 73) on the middle Folding wings 70, 75 articulated via second folding joints 71, 74 are. Again, the combined pan and slide movement the folding wing via a linear drive system 58 by means of cams 79, 82, 83, 86 and in the backdrop of these Cam-guided rotary levers 87-90 causes. The rotary levers 87-90 are at adjacent ends of the adjacent ones, respectively second (i.e. inner and middle) folding wings 70, 72 and 75, 73 attached.

The cam disks 79, 86 of the middle folding wings 70, 75 are via drivers 80, 85 on a first linear drive element 64 attached while the cams 82, 83 of inner folding wing 72, 73 via driver 81, 84 on a parallel second linear drive element 63 are attached. The linear drive elements 63 and 64 run as closed Loops between a drive wheel 62 or 60 and a deflection wheel 65 and 66. both linear drive elements 63, 64 are driven together by a drive motor 59, being between the two drive wheels 60, 61 a graduated power transmission 61 is provided. Also in In this example, the cam plates 79, 82, 83, 86 part of linearly guided carriages, but in Fig. 6 are not shown. Is also not registered from For reasons of clarity, the one comparable to FIG. 4 Locking system, which through the cams in one first idle stroke is actuated when opening.

Overall, the invention results in a folding wing door, which is simple and modular, flexible to the most varied Circumstances can be adjusted with little Additional effort also locked and unlocked by hand can be and is characterized by a soft, harmonious Characterized movement sequence.

LIST OF DESIGNATIONS

1.57

Folding wing door

2.58

Drive system (linear)

3rd

Deflection wheel

4th

Drive element (linear; toothed belt, chain etc.)

5

Drive motor

6

drive wheel

7, 8

Carriage (linearly guided)

7a, 8a

Driver

9.16

Axis of rotation

10, 12

Folding wing

11.14

Folding joint

13, 15

Folding wing

17th

Floor guide

18th

ground

19.20

Cam

19a, 20a

Leadership backdrop

21.22

Rotary lever 1

23.24

Lever axis

25.26

Locking system

27.36

Hollow profile

28.29

Guide rail

30.31

Wheel

32.35

Leadership role

33

Support bracket

34

Guide rail

37.44

Driver

38.39.40

Wheel

41.43

Leadership role

42

Support bracket

45

pen

46

Backdrop

47.52

Axis of rotation

48

Locking element

49.51

Swivel axis

50

Swivel lever

53

Connecting rod

54

Locking pin

55

Locking plate

56

Long hole

59

Drive motor

60, 62

drive wheel

61

Power transmission

63, 64

Drive element (linear)

65.66

Deflection wheel

67.78

Axis of rotation

68,70,72

Folding wing

69.71

Folding joint

73,75,77

Folding wing

74.76

Folding joint

79.82

Cam

80.81

Driver

83, 86.

Cam

84, 85

Driver

87-90

Rotary lever

Claims (11)

1. A folding leaf door (1, 57), comprising a plurality of folding leaves (10, 12, 13, 15 or 68, 70, 72, 73, 75, 77), which are connected to one another in pairs by folding joints (11, 14 or 69, 71, 74, 76), wherein the folding leaf door (1, 57) comprises first folding leaves (10, 15 or 68, 77), which are rotatable around a fixed axis of rotation (9, 16 or 67, 78), as well as second folding leaves (12, 13 or 70, 72, 73, 75), which are pivotally connected to the first folding leaves (10, 15 or 68, 77) via folding joints (11, 14 or 69, 71, 74, 76), and a linear drive system (2, 58) which comprises a linear drive element (4 or 63, 64) driven by a drive motor (5, 59), and which opens and closes the folding leaf door (1, 57) through a linear movement in the door's plane, as well as means for locking the folding leaves (10, 12, 13, 15 or 68, 70, 72, 73, 75, 77) in the case of a closed door, against any unauthorized opening, which locking means is formed as an active, controlled locking system (25, 26), characterized in that, the locking system (25, 26) respectively comprises a pivotable locking element (48) around a specially fixed pivot axis (49), which is mechanically coupled with the linear drive element (4 or 63, 64) and locks or unlocks the second folding leaves (12, 13), and in that a drive pin (37, 44) is respectively connected with the linear drive element (4 or 63, 64) for mechanically coupling the linear drive element (4 or 63, 64) and the locking element (48), which upon opening or upon closing the door causes a unlocking or locking pivotal movement of the locking element (48).
2. The folding leaf door according to claim 1, characterized in that the linear drive system (2, 58) and the locking system (25, 26) are positioned on the upper side of the folding door (1, 57), respectively.
3. The folding leaf door according to claim 2, characterized in that the linear drive element (4 or 63, 64) is mechanically coupled with the second folding leaves (12, 13 or 70, 72, 73, 75) so that the second folding leaves (12, 13 or 70, 72, 73, 75) simultaneously execute a linear and pivotal movement for a linear movement of the linear drive element (4 or 63, 64).
4. The folding leaf door according to claim 3, characterized in that the linear drive element (4 or 63, 64) is formed in the shape of a band, especially as a cable, a belt or a chain, and exhibits the shape of a closed loop extending along the door, which runs on the one hand over a drive wheel (6, 60, 62) driven by the drive motor (5, 59) and on the other hand over a drawback pulley (3, 65, 66), in that fixed carriages(7, 8) guided parallel to the linear drive element (4 or 63, 64) and connected to the linear drive element (4 or 63, 64) with respectively a cam disc (19, 20) containing a guiding slide (19a, 20a), as well as rotation levers(21, 22 or 87-90) are provided for the mechanical coupling between the linear drive element (4 or 63, 64) and the second folding leaves (12, 13 or 70, 72, 73, 75), which rotation levers (21, 22 or 87-90) are securely mounted on one of its ends on the associated folding leaf and guided with the other end in the guiding slide (19a, 20a) of the associated guiding disc (19, 20), and the guiding slides (19a, 20a) are formed so that the second folding leaves (12, 13 or 70, 72, 73, 75) execute a pivotal movement first on opening the door or lastly upon closing the door.
5. The folding leaf door according to claim 4, characterized in that, only a second folding leaf (12 or 13) is respectively jointed to the first folding leaf (10 or 15) over a folding joint (11 or 14), in that the rotation levers (21 or 22) are respectively mounted on the free end of the second folding leaf (12 or 13) and in that the locking elements (48) lock the folding leaves (10, 12, 13, 15) in the direct vicinity of the folding joints (11 or 14).
6. The folding leaf door according to claim 5, characterized in that the second folding leaves (12 or 13) are linearly guided with their free ends in a guide rail (34).
7. The folding leaf door according to any of claims 4 to 6, characterized in that, a drive pin (37, 44) is respectively mounted on the guide discs (19, 20) for mechanically coupling the linear drive element (4 or 63, 64) and the locking element (48), which pin, upon opening or closing the door, engages with a pivotally mounted, pivot lever (50) and pivots the latter, in that the pivotal movement of the pivot lever (50) is transferred to the locking element (48) by means of a connection rod (53) and in that the guiding slides (19a, 20a) are formed so that upon opening the door in a return stroke of the carriages (7, 8) or of the cam discs (19, 20), the lock is first loosened, without moving the folding leaves (10, 12, 13, 15) and just after, the pivotal movement of the second folding leaves (12, 13) is initiated, or in that upon closing the door the last pivotal movement of the second folding leaves (12, 13) is completed first and just after, in a return stroke of the carriage (7, 8) or the cam discs (19, 20), the lock is carried out.
8. The folding leaf door according to claim 4, characterized in that the folding leaf door is formed as a partitioned door preferably symmetrical to the median plan, in that each of the portions (10, 12 or 13, 15) is associated with at least one carriage (7 or 8) and that the carriages of one of the halves are connected with the forward stroke and the carriages of the other half are connected with the return stroke of the linear drive element (4).
9. The folding leaf door according to claim 2, characterized in that the linear drive system (2, 58) is housed in a box formed out of one or more hollow sections (27, 36).
10. The folding leaf door according to claim 4, characterized in that respectively two second folding leaves (70, 72 or 75, 73) are jointed to the first folding leaf (68 or 77) one behind the other through two folding joints (69, 71 or 76, 74), in that the rotation levers (87, 88 or 89, 90) are respectively mounted on the neighboring ends of the neighboring second folding leaves (70, 72 or 75, 73), in that respectively a cam disc (79, 82, 83, 86) is associated with each of the rotation levers (87 - 90), and that the cam discs (79, 82, 83, 86) are moved through two parallel linear drive elements (63, 64), wherein the cam discs (82, 83) of the internal folding leaves (72, 73) are associated with a linear drive element (63), and the cam discs (79, 86) of the median folding leaves (70, 75) are associated with the other linear drive element (64).
11. The folding leaf door according to claim 10, characterized in that both linear drive elements (63, 64) are driven in common by a drive motor (59).

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