Anti-sinking device

Abstract

Anti-sinking device with: a first guide portion (28), a second guide portion (78), an intermediate guide portion (32), first connecting means (54) between the first guide portion (28) and the intermediate guide portion (32), giving an angular deviation and making it possible to ensure continuity of guidance for a guide element such as a guide roller (30), - second connecting means (34, 64) between the intermediate guide portion (32) and the second guide portion (78), forming an elbow and making it possible to ensure continuity of guidance for an element such as a guide roller (30), - a locking system with a male part (84) and a female part (88), and - fixing elements (44, 78) of the first and second guide portions (28, 78) with their guide groove facing downwards Abstract figure: Figure 2

Description

Title of the invention: Anti-sinking device

[0001] The present disclosure relates to an anti-sinking device intended for the last panel of a side-moving sectional door and to a side-moving sectional door provided with such an anti-sinking device. Technical field

[0002] The present disclosure relates to the field of sectional doors. It is known to use such a door to close a relatively large opening, for example a garage opening of a residential house. This type of door is most often implemented when the ceiling height inside the construction is limited (compared to a tilting door which requires overhead clearance). Such a door comprises rigid panels juxtaposed and hinged relative to each other around axes corresponding substantially to two neighboring edges of said panels. This set of panels, called a leaf, is guided by a lower rail (fixed to the floor) and by an upper rail (fixed to the frame) which each extend along the opening of the construction and inside said construction, generally forming a right angle.The width of the panels is adapted to the radius of curvature of the elbow so that the set of panels can take a closed position in which the corresponding opening is then completely closed by said door as well as an open position allowing passage through the opening, preferably a complete passage.

[0003] In a side-moving sectional door, there is a "first" panel which is the first element to close the opening when the door moves from its open position to its closed position. Opposite this first panel, there is a "last" panel. In most doors of this type, to lock the door in the closed position, the first panel is immobilized. This prevents any movement of the other panels since these are engaged with each other, the lower rail and the upper rail which are used for guiding the different panels in a lateral movement. Prior art

[0004] A sectional door, for example, illustrated in document FR3078094A1. The door described in this document comprises a first panel shaped like a gate. Thus, it is possible to partially open the door to allow the passage of a person, for example, without it being necessary to move the entire leaf. A locking system at the first panel is described in detail in this document.

[0005] A problem with such a sectional door concerns the closing at the last panel, that is to say the panel which closes the corresponding opening last during a closing movement. This last panel, and more particularly its free vertical edge (opposite the first panel), may have play. As a result, when a seal is made, the seal used to make this seal may gape and not perform its function under optimal conditions.

[0006] Another problem is the locking of this last panel. The door is locked at the first panel and due to the inevitable mechanical tolerances on a door which is generally more than two meters long, there can be play at the last panel which is therefore more vulnerable in the event of malicious acts, such as vandalism. Summary

[0007] The present disclosure improves the situation. Its purpose is thus to provide a device intended for a sectional door which makes it possible to guarantee good sealing even at the level of the last panel. Preferably, this device will also allow better locking of the last panel, making the sectional door more resistant to break-ins.

[0008] An anti-sinking device is proposed for cooperating with a lateral moving sectional door.

[0009] According to the present disclosure, such an anti-sinking device comprises: - a first guide portion having a first guide groove, - a second guide portion having a second guide groove, - an intermediate guide portion arranged between the first guide portion and the second guide portion and having an intermediate guide groove, - first connecting means between the first guide portion and the intermediate guide portion, said connecting means connecting the first guide portion and the intermediate guide portion in such a way that, on the one hand, the intermediate guide portion is in the extension of the first guide portion but giving an angular deviation and, on the other hand, said connecting means have a guide groove making it possible to ensure continuity of guidance for a guide element such as a guide roller, - second connecting means for ensuring a connection between the intermediate guide portion and the second guide portion, the second connecting means forming an elbow between the intermediate guide portion and the second guide portion and having a curved connecting piece whose bending angle is adjustable, with a guide groove making it possible to ensure continuity of guidance for an element such as a guide roller, and - fixing elements for supporting the first guide portion and the second guide portion with their guide groove open downwards.

[0010] In this way, guidance of a last leaf panel whose free edge is provided with a guide roller or the like can be achieved to gradually bring said roller to the second guide portion which is chosen to give the free edge of the last panel a translational movement at the end of the closing stroke (and at the start of the opening stroke) and thus to properly control the positioning of the last panel parallel to a corresponding opening.

[0011] The features set out in the following paragraphs may, optionally, be implemented, independently of one another or in combination with one another:

[0012] - the curved connecting piece may have a substantially flat flexible base of which extend perpendicular to the base of the slats, each end of the base having means for connection to a guide portion, a guide groove being made in a lateral edge of each slat between the flexible base and the free end of the slat. In this variant, it is also possible to provide that each slat has, near its free end on one face, a projecting zone and on the opposite face a hollow zone so that when the base flexes the free ends of the slats move closer to each other, the projecting zones cooperate with the hollow zones, securing the slats to each other.

[0013] - the first guide portion and the intermediate guide portion are produced in C-shaped sections with similar sections;

[0014] - the first connecting means comprise several first connecting pieces, each connecting piece has a lower face into which opens a guide groove forming an arc of a circle, two radial faces forming a dihedron, and the first connecting pieces are similar. Alternatively, each radial face may have an opening and a projection so as to allow a connecting piece to fit together with another similar connecting piece;

[0015] - the device further comprises a locking system with a male part cooperating with a female part.

[0016] According to another aspect, there is provided a lateral moving sectional door comprising: - a first panel, - a last panel, - intermediate panels mounted hinged between the first panel and the last panel, - a lower guide rail intended to be fixed to a floor, - an upper guide rail having a first rectilinear part, a second rectilinear part and a curved part connecting the first rectilinear part to the second rectilinear part, a guide groove extending along the entire length of the guide rail, characterized in that it further comprises an anti-sinking device as described above, in that the first guide portion of the anti-sinking device is parallel to the first straight portion of the upper guide rail, and in that the second guide portion of the anti-sinking device is parallel to the second straight portion of the upper guide rail.

[0017] The features set out in the following paragraphs may, optionally, be implemented, independently of one another or in combination with one another:

[0018] - the last panel has a guide roller arranged near the vertical edge free from said last panel, said roller being engaged in a guide groove of the anti-sinking device, in that one part (male part or female part) of the locking device is fixed on the last panel, the other part (female part or male part) being fixed so as to be fixed relative to the lower guide rail of the sectional door;

[0019] - each first connecting piece is supported by the curved part of the rail of upper guide. Brief description of the figures

[0020] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawing, in which: Fig.l

[0021] [Fig.l] shows in perspective an example of a sectional door with lateral movement according to one embodiment. Fig. 2

[0022] [Fig.2] partially shows an anti-sinking device associated with the door sectional view of [Fig.l], on an enlarged scale and from a different point of view. Fig. 3

[0023] [Fig.3] shows in perspective a first connecting device between a first rail secondary and an intermediate secondary rail of the anti-sinking device of [Fig.2], Fig. 4

[0024] [Fig.4] shows an exploded view of the first connecting device of [Fig.3]. Fig. 5

[0025] [Fig.5] shows in perspective the assembly of a rail and its cooperation with a roller. Fig. 6

[0026] [Fig.6] shows in a top view on an enlarged scale an element of the first device connecting figures 3 and 4. Fig. 7

[0027] [Fig.7] shows in perspective a second connecting device intended to connect the rail intermediate secondary to a second secondary rail. Fig. 8

[0028] [Fig.8] shows the two connecting devices of figures 3, 4, 5 and 6. Fig. 9

[0029] [Fig.9A] shows a bendable element of the second connecting device in perspective on an enlarged scale.

[0030] [Fig.9B] shows an alternative embodiment of the element of [Fig.9A] in the curved position. Fig. 10

[0031] [Fig. 10] shows on an enlarged scale in perspective an accessory used in cooperation with the element illustrated in Figures 9A and 9B to limit bending of said element. Fig. 11

[0032] [Fig. 11] shows a locking device for an anti-sinking device of the previous figures. Description of the embodiments

[0033] Reference is now made to [Fig. 1]. In this figure, the person skilled in the art will recognize a lateral moving sectional door. Figures 1 and 2 show a first wall 2 and a second wall 4 which are arranged at right angles (another relative orientation is possible but this is the most common configuration). The second wall 4 has an opening (hidden by the sectional door) and the purpose of the sectional door is to open and close this opening.

[0034] In Figures 1 and 2, the sectional door opens to the left while in Figures 3 to 11 the illustrated door opens to the right. The assembly is the same but with mirror symmetry.

[0035] The sectional door comprises several panels: a first panel 8, a last panel 10 and intermediate panels 12. The first panel 8 is the one that is capable of moving along the entire opening. These panels slide, on the one hand, on a lower rail 14 fixed to a floor 16 and, on the other hand, by being guided and held by an upper rail 18 which, as illustrated here, is fixed to the first wall 2 and to the second wall 4 but which could also, for example, be suspended from a ceiling (not illustrated here). In the open position, the panels of the sectional door are all located along the first wall 2 while in the closed position ([Fig.l]) of the sectional door, all the panels are located along the second wall 4 opposite the opening so as to close it, preferably in a watertight manner.

[0036] Those skilled in the art know such a sectional door and its operation. Document FR3078094 for example describes such a door. The door of the prior art in this document, as well as the door illustrated here, comprise a gate which forms the first panel 8. In the present disclosure, the first panel 8 does not necessarily constitute a gate. Such a door being known, the “conventional” elements of the prior art are therefore not described in detail here (articulation between the panels, guidance on the lower rail, guidance at the upper rail, shape of the rails, etc.).

[0037] It will be assumed hereinafter that the first wall 2 and the second wall 4 are vertical walls. The panels also extend vertically. The floor 16 is assumed to be horizontal. The lower rail 14 and the upper rail 18 thus extend in a substantially horizontal plane.

[0038] Optionally, it is noted that the sectional door illustrated in Figures 1 and 2 is motorized. The present disclosure is not limited to this type of door but works equally well for a manual or motorized system. The motorization consists of providing a movement rail 20 on the first wall 2, preferably substantially at mid-height of the door, arranged horizontally. A motorized carriage 22 can move along (at least over part of the length of said rail) using an electric motor and is connected by a connecting rod 24 to the last panel 10. The motorized carriage 22 then pushes the last panel 10 to close the sectional door and pulls the last panel 10 to open the sectional door.

[0039] As can be seen in [Fig. 1], the first panel 8 is provided with a lock 26 making it possible to ensure locking at least at three points of this first panel 8. On the other hand, in a sectional door of the prior art, it is not known to carry out locking at the level of the last panel 10. The following description provides the means of firstly carrying out precise positioning of the last panel 10 and then also locking of this last panel 10, this locking being carried out automatically when the sectional door is closed (and unlocking automatically when this door is opened). To carry out this precise positioning and this locking of the last panel 10, it is proposed to produce a particular guide for this last panel 10 and a device called an anti-sinking device ensuring both guidance and advantageously locking of the last panel 10 is described below and illustrated in the figures..

[0040] [Fig.2] shows secondary guide means for the sectional door. These guide means are called secondary because they complement the means guide already known to those skilled in the art for opening and closing the sectional door.

[0041] The guiding means of the anti-sinking device, intended for guiding the last panel 10, thus comprise in particular: - a first fixed secondary rail 28 extending along the first wall 2 and defining a first guide portion for a roller 30 (figures 5 and 11), - connecting and direction changing means, - an intermediate secondary rail 32 inclined relative to the first secondary rail 28 (and to the first wall 2), and - a curved connecting piece 34 with an adjustable bending angle to create an additional deviation adapted to the dimension of the spandrel.

[0042] The first secondary rail 28 and the intermediate secondary rail 32 are for example made from the same profile. A section of this profile can be seen in [Fig.4]: it is a profile with a substantially flat (and horizontal) base 36 and of overall C-shape, the opening of the profile being oriented downwards. The space defined by the inside of the branches of the C of the first secondary rail 28 thus forms a guide groove 37 intended to receive the roller 30.

[0043] In the illustrated embodiment, provision is made to fix the upper rail 18 of the sectional door to support profiles. Here, a first support profile 38 is provided, fixed horizontally to the first wall 2, and a second support profile 40 is provided, fixed horizontally to the second wall 4 (at the same height as the first support profile 38). These profiles are similar and are such that when they are fixed to their respective wall, a groove 42 is formed in the upper part of the profile. In the example illustrated in the drawing, the groove 42 is provided against the wall to which the support profile is fixed.

[0044] As can be seen in Figures 3 and 4 for example, provision is made along the first wall 2 to fix the first support profile 38. First fixing pieces 44 are then provided, each ensuring both the fixing of the upper rail 18 and the first secondary rail 28. These first fixing pieces 44 are, in the example illustrated, profiled pieces which comprise: - a vertical wing 46 of a shape adapted to cooperate with the groove 42, - a rectangular section housing 48, and - a clamp 50 in the form of a stirrup open downwards to receive the upper rail 18 by clipping.

[0045] First fixing pieces 44 are regularly provided along the first support profile 38. The first secondary rail 28 is held under the housing 48 using a wedging clip 52 (figures 4 and 5) as shown in more detail in [Fig. 5]. In this [Fig. 5], parts of the anti-sinking device have been removed to allow the cooperation between in particular the first fixing piece 44, the first secondary rail 28 and the wedging clip 52. This figure further shows the roller 30 in the first secondary rail 28 as well as the means for fixing this roller 30 on the last panel 10. As can be seen in [Fig.5], the wedging clip 52 has two elastic tabs which cooperate with the lower face of the housing 48 so as to hold under the lower face of the housing 48 a wedge with holding tabs of a shape adapted to the first secondary rail 28 to hold the latter against the clamp 50 carrying the upper rail 18.

[0046] In a known manner, as mentioned for example in the preamble, the upper rail 18 has a first rectilinear part (along the first wall 2) and a second rectilinear part (along the second wall 4), the two rectilinear parts being connected by a curved part. The curved part is most often in an arc of a circle forming substantially a quarter of a circle. The upper rail 18 can be obtained by bending a profiled rail.

[0047] The first secondary rail 28 extends parallel along the first rectilinear part of the upper rail 18, for example up to the limit between the first rectilinear part and the curved part of the upper rail 18. The guide groove formed by the first secondary rail 28 is then extended by first connecting pieces 54 (figures 3, 4 and 6).

[0048] [Fig.3] illustrates how the first connecting pieces are intended to be fixed 54 on the curved portion of the upper rail 18. As can be seen in [Fig.4] which is an exploded view showing the first connecting pieces 54 in perspective, each of these pieces has on a lateral face a clip shape 56 to cooperate with the upper rail 18. Each first connecting piece 54 further comprises a substantially hollow body. The latter has two radial faces 60 (relative to the curvature of the upper rail 18) which in top view ([Fig.6]) form a dihedral with an angle of the order of a degree to a few degrees. The lower face of the body is grooved with a groove profile corresponding to the guide groove 37. From each radial face 60 extends a projection 62. The projections 62 on the two radial faces 60 are offset so that two first connecting pieces 54 can fit into each other as illustrated in [Fig.3].These first connecting pieces 54 then form an arc-shaped assembly, the angle of this arc-shaped assembly depending on the number of pieces fitted into each other. The projections 62 and the housing 48 of a first fixing piece are adapted to each other in such a way that a projection 62 can be introduced into the housing in a fitted manner and thus the groove made in the body 58 extends the guide groove 37 of the first secondary rail 28 mounted under the housing 48.

[0049] A second connecting piece 64 is provided to provide the link between a set (possibly with a single piece) of first connecting pieces 54 fitted together. into each other and the intermediate secondary rail. This second connecting piece 64 has, on the one hand, a face with a projection 62 so as to be able to cooperate with a first connecting piece 54 and fit into it and, on the other hand, a lower housing 66 for receiving one end of the intermediate secondary rail 32 so as to provide continuity of the guide groove 37.

[0050] The other end of the intermediate secondary rail 32 is connected to the curved connecting piece 34 (figures 7 to 9 in particular). This curved connecting piece 34 comprises a flexible base 70 from which extend strips 72 as well as two connecting ends 74 each with a projection 62 similar to the projections of the first connecting pieces 54 and the second connecting piece 64. In top view, the curved connecting piece 34 at rest, that is to say not curved, resembles a comb. The curved connecting piece 34 is intended to be curved in such a way that the free ends of the strips 72 approach each other. It is provided that these strips 72 can fit into each other to form a rigid assembly ([Fig.9B]).Thus, each strip 72 near its free end has on a face opposite a neighboring strip a projecting relief and on its opposite face a hollow relief so that a projecting relief of a strip 72 can be inserted into a hollow relief of a neighboring strip when the flexible base 70 bends. The cooperation between the strips 72 in the bent position makes it possible to avoid any twisting of the bent connecting piece 34. In the illustrated embodiment, the raised parts are ribs which extend parallel to the flexible base 70 and the hollow parts are corresponding grooves also parallel to the flexible base 70.

[0051] To ensure the continuity of the guide groove, the connection ends 74 and each of the strips 72 are cut to reproduce the section of the guide groove and allow the passage / guidance of the roller 30.

[0052] The connection ends 74 can cooperate with a second connecting piece 64. Such a second connecting piece 64 is then used to connect the intermediate secondary rail 32 to the curved connecting piece 34.

[0053] To limit the bending of the curved connecting piece 34, it is provided to use one or more inter-slat pieces 76 ([Fig.10]). Depending on the bending angle required, inter-slat pieces 76 are introduced each time between two slats 72. Preferably, these inter-slat pieces 76 are introduced first of all between a slat 72 and a connection end 74, more precisely the connection end opposite the intermediate secondary rail 32. If several inter-slat pieces 76 are used, they will be placed from the connection end 74 opposite the intermediate secondary rail, housing themselves successively in the free spaces between the slats 72.

[0054] An inter-slat piece 76 is illustrated in [Fig. 10]. Such a piece substantially takes the form of a slat, with, like each slat, a cutout for the passage of the roller 30, a raised part on one face and a raised part on the opposite face.

[0055] Finally, the curved connecting piece 34 is connected to an end piece 78 fixed to the second support profile 40. This end piece 78 is fixed to the second support profile 40, for example, using a vertical wing cooperating with the groove 42 described above. The connection of this end piece 78 with the curved connecting piece 34 is advantageously achieved by interlocking and this end piece 78 advantageously has a projection 62 and a housing for receiving the corresponding projection 62 of the connection end 74 of the curved connecting piece.

[0056] The curved connecting piece 34 is shown in the curved position in Figures 2 and 9B while in the other figures, it is at rest, without bending.

[0057] In [Fig.9B] is shown an alternative embodiment of the curved connecting piece 34 (compared to [Fig.9A]). The difference here is at the connection ends 74. It is provided here to connect the curved connecting piece 34 with the connecting pieces 64 (which must be adapted accordingly) by a tenon / mortise connection. The assembly of the elements with this type of connection is done in a vertical (or radial) movement in the installed mounted position whereas for the other parts illustrated, the connection between the parts is made by longitudinal interlocking (i.e. horizontal in the installed mounted position). It is preferable from an ergonomic point of view to have only one type of connection (tenon / mortise, interlocking, or other) between the different parts of the system but it is also possible to have a mix.

[0058] [Fig. 11] illustrates the mounting of the roller 30 on the last panel 10. This figure illustrates the frame of the last panel 10. The roller 30 is mounted at the end of an axis 80 held in a bearing made on a cradle 82 fixed on the last panel 10. It is noted that the axis 80 is offset relative to the last panel 10: on the one hand it is offset beyond the edge of the last panel 10 opposite the other panels and, on the other hand, it is offset towards the outside of the sectional door, that is to say towards the first wall 2 or the second wall 4.

[0059] [Fig. 11] also illustrates locking means with a male element cooperating with a female part in the form of a buttonhole. Here, the male part is formed by a screw 84 mounted in an anti-sinking support 86 fixed on the edge of the last panel 10 opposite the other panels of the sectional door. The head of the screw 84 projects relative to the outer face of the last panel 10 and cooperates with the female part in the form of a buttonhole 88 which has a through slot for receiving the screw rod, the head of the screw acting as a button in the buttonhole. The buttonhole 88 can be fixed directly to the second wall 4 or to a support profile (solution illustrated) which can for example be similar to the first support profile 38 or to the second support profile 40 but oriented vertically. Industrial application

[0060] The proposed device provides an original way of guiding the free edge of the last panel 10 to control its trajectory and ensure a rectilinear movement of this free edge at the end of closing of the sectional door (in the known systems of the prior art, this free edge at the end of closing most often describes an arc of a circle). The proposed device is also suitable for reduced spandrels, the spandrel being, in the description above, the distance which separates the vertical edge of the opening 6 from the first wall 2.

[0061] The device, in a closing movement of the sectional door, guides the free edge of the last panel 10 firstly linearly and parallel to the first wall as long as the roller 30 is in the first secondary rail 28. When approaching the second wall, the free edge is deflected towards the opening: its trajectory is deflected by a few degrees (for example by an angle between 2 and 30°). The roller is then guided in the intermediate secondary rail. Then, in the immediate vicinity of the second wall, the roller enters the curved connecting piece, takes a trajectory in an arc of a circle and the free edge of the last panel 10 is deflected again to take a linear movement (preferably parallel to the second wall) allowing locking / hooking to be carried out.At the end of the stroke, possibly before the roller leaves the curved connecting piece, as well as in the end piece, the roller follows a rectilinear trajectory, parallel to the second wall and tangent to the opening. Locking can be achieved using any type of locking (bolt / strike, screw / buttonhole or other) and several locking points can be made, for example at the bottom and middle of the door.

[0062] The device can adapt to almost any situation. Thanks to its modularity, it can adapt to walls that are not perpendicular, to spandrels of all sizes, even small ones. The modular kinematics makes it possible to ensure a movement tangent to the opening by adapting the specific approach trajectory to each spandrel value (and angle between the two walls).

[0063] With the system described above, each panel moves along its support / upper rail (possibly being guided by a lower rail). Only the last panel has a specific guide which ensures a clean approach trajectory in order to achieve guidance tangent to the opening.

[0064] The anti-sinking device described here makes it possible to lock the last panel 10 of the sectional door described using a locking device. Locking is carried out automatically when the sectional door is closed and unlocking is carried out without any particular action when the sectional door is opened.

[0065] The present disclosure is not limited to the exemplary embodiment and the variants described above, only as examples, but it encompasses all the variants that a person skilled in the art may envisage within the framework of the protection sought.

Claims

Claims

1. Anti-sinking device intended to cooperate with a lateral moving sectional door, characterized in that it comprises: - a first guide portion (28) having a first guide groove, - a second guide portion (78) having a second guide groove, - an intermediate guide portion (32) arranged between the first guide portion (28) and the second guide portion (78) and having an intermediate guide groove, - first connecting means (54) between the first guide portion (28) and the intermediate guide portion (32), said connecting means (54) connecting the first guide portion (28) and the intermediate guide portion (32) in such a way that, on the one hand, the intermediate guide portion (32) is in the extension of the first guide portion (28) but giving an angular deviation and, on the other hand,said connecting means (54) have a guide groove for ensuring continuity of guidance for a guide element such as a guide roller (30), - second connecting means (34, 64) for ensuring a connection between the intermediate guide portion (32) and the second guide portion (78), the second connecting means forming an elbow between the intermediate guide portion (32) and the second guide portion (78) and having a curved connecting piece (34) whose bending angle is adjustable, with a guide groove for ensuring continuity of guidance for an element such as a guide roller (30), and - fixing elements (44, 78) for supporting the first guide portion (28) and the second guide portion (78) with their guide groove open downwards.,

2. Anti-sinking device according to claim 1, characterized in that the curved connecting piece (34) has a substantially flat flexible base (70) from which slats (72) extend perpendicular to the base, each end of the base having connection means (74, 64) to a guide portion, a groove guide being made in a lateral edge of each strip (72) between the flexible base (70) and the free end of the strip.

3. Anti-sinking device according to claim 2, characterized in that each strip (72) has near its free end on one face a projecting zone and on the opposite face a hollow zone such that when the base flexes in such a way that the free ends of the strips (72) approach each other, the projecting zones cooperate with the hollow zones, securing the strips to each other.

4. Anti-sinking device according to one of claims 1 to 3, characterized in that the first guide portion (28) and the intermediate guide portion (32) are made from C-shaped profiled parts having similar sections.

5. Anti-sinking device according to one of claims 1 to 4, characterized in that the first connecting means comprise several first connecting pieces (54), in that each connecting piece has a lower face into which opens a guide groove forming an arc of a circle, two radial faces (60) forming a dihedron, and in that the first connecting pieces (54) are similar.

6. Anti-sinking device according to claim 5, characterized in that each radial face (60) has an opening and a projection (62) so as to allow a connecting piece (54) to fit into another similar connecting piece (54).

7. Anti-sinking device according to one of claims 1 to 6, characterized in that it further comprises a locking system with a male part cooperating with a female part.

8. Laterally moving sectional door comprising: - a first panel (8), - a last panel (10), - intermediate panels (12) mounted hinged between the first panel (8) and the last panel (10), - a lower guide rail (14) intended to be fixed to a floor, - an upper guide rail (18) having a first rectilinear part, a second rectilinear part and a curved part connecting the first rectilinear part to the second rectilinear part, a guide groove extending along the entire length of the guide rail, characterized in that it further comprises an anti-sinking device according to one of claims 1 to 7, in that the first guide portion (28) of the anti-sinking device is parallel to the first rectilinear part of the upper guide rail, and in that the second guide portion (78) of the anti-sinking device is parallel to the second rectilinear part of the upper guide rail.

9. Laterally moving sectional door according to claim 8, characterized in that the last panel (10) has a guide roller (30) arranged near the free vertical edge of said last panel (10), said roller (30) being engaged in a guide groove of the anti-sinking device, in that one part (male part or female part) of the locking device is fixed on the last panel, the other part (female part or male part) being fixed so as to be fixed relative to the lower guide rail of the sectional door.

10. Laterally moving sectional door according to one of claims 8 or 9, characterized in that each first connecting piece (54) is supported by the curved part of the upper guide rail (18).

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