Patent Publication Number: US-2011049941-A1

Title: Folding top arrangement for a convertible

Description:
BACKGROUND 
     EP 1 398 195 A1 describes a folding top arrangement for a convertible with a first roof part, which is at the front in the direction of travel, a second roof part, which is at the rear in the direction of travel, and a third, central, roof part. The three roof parts are each designed as rigid shell components and completely cover the interior of the convertible when the folding top is closed. To enable the folding top to be opened, the three roof parts can be arranged as a roof part stack that can be deposited in a rear area of the convertible. For this purpose, is the folding top arrangement comprises a main link mechanism comprising a first main link and a second main link, both of which are pivotally attached to the vehicle body, and a holding part, which connects the first main link to the second main fink, with the result that the vehicle body, the holding part, the first main link and the second main link together form a main four-bar arrangement, the coupler of which is formed by the holding part. A main four-bar arrangement is provided in the region of each of the two vehicle side faces. When the folding top is closed, the third roof part extends over the interior of the vehicle in the transverse direction of the vehicle and, on each side of the vehicle, is connected immovably to the holding part provided there. Each of the holding parts has a first mounting section, which extends forward in relation to the direction of travel, beyond the third roof part, and a second mounting section, which extends rearward beyond the third roof part. When the folding top is closed, the first roof part is arranged in front of the third roof part and, to open the folding top, can be pivoted rearward into a position above the holding part. For this purpose, the first roof part is mounted on the first mounting section of the holding part, on the one hand, and on the third roof part, on the other hand, by means of a drivable first kinematic linkage. The first kinematic linkage comprises a first, front, roof part link and a second, rear, roof part link, the first roof part link being connected pivotably to the first roof part at a first pivot point and being connected pivotably to the first mounting section of the holding part at a second pivot point. At a first end, the second roof part link is connected pivotably to an edge of the first roof part which is at the rear in relation to the direction of travel. At its second end, the second roof part link is furthermore pivoted to the third roof part by means of a four-bar arrangement. For this purpose, the four-bar arrangement has a first link and a second link, which are pivoted to the second end of the second roof part link and to the third roof part respectively. The third roof part thus forms a ground link and the second roof to part link forms a coupler of the four-bar arrangement. When the folding top is closed, the second roof part link is accommodated completely in a depression provided in the third roof part. Starting from the closed position, the first roof part is pivoted rearward into a position above the holding part and the third roof part by pivoting the first roof part link and the second roof part link. To drive this pivoting motion, a kinematic drive mechanism comprising a first auxiliary link, a second auxiliary link and a coupler rod is provided. A first end of the first auxiliary link is pivotally attached to the first roof part link at a third pivot point arranged between the first pivot point and the second pivot point and, at its second end, the first auxiliary link is connected to a first end of the second auxiliary link at a fourth pivot point. The second auxiliary link is pivotally attached to the holding part at a fifth pivot point, with the result that the holding part, the first auxiliary link, the first roof link and the second auxiliary link together form a first four-bar arrangement, in which the holding part forms a ground link of the first four-bar arrangement and the first auxiliary link forms a coupler of the first four-bar arrangement. The coupler rod engages on the first four-bar arrangement in the region of the fourth pivot point, with the result that pivoting of the first four-bar arrangement and hence pivoting of the first roof part link relative to the holding part can be driven and controlled by means of the coupler rod. One disadvantage with this folding top arrangement is that the second roof part link, which can be lowered into the third roof part, necessitates a complex seal for the depression provided in the third roof part and furthermore necessitates an expensive optical cover for the second roof part link when the folding top is closed. Another disadvantage is that the first mounting section of the holding part extends a relatively long way forward in the direction of travel beyond the extent of the third roof part, with the result that the holding part has a relatively large extent in comparison with the third roof part and, when the folding top is completely opened, takes up a correspondingly large amount of deposition space in the rear area of the convertible. The large amount by which the first mounting section projects forward beyond the third roof part is necessary especially because the first roof part link rests against a front edge of the third roof part when the first roof part has been pivoted rearward. The ratio of the length of the first mounting section to the height of the third roof part therefore determines the angle at which the first roof part link is arranged relative to the horizontal in the deposition position of the first roof part and hence also the vertical distance between the first roof part, which is mounted on the first roof part link, and the third roof part. In order to achieve compact deposition of the first roof part above the third roof part in terms of vertical extent, it is therefore necessary that the first mounting section should extend a correspondingly long way forward beyond the third roof part. 
     DE 10 2007 054 469 A1 describes a folding top arrangement for a convertible, which is designed as a folding cloth top. The folding top arrangement comprises a link mechanism arranged on each side of the vehicle, a front bow and a number of bows which span the interior of the vehicle in the transverse direction when the folding top is closed. The link mechanism comprises a first main link and a second main link, each of which has a first end pivotally attached to the vehicle body and a second end remote from the vehicle body. The link mechanism furthermore comprises a holding part, which is pivoted to the first main link in the region of the second end and which extends forward in the direction of travel, starting from the first main link, when the folding top is closed. The holding part is pivoted to the second end of the second main link by way of a short coupler link. A first roof part including the front bow is mounted pivotably at a first pivot point at an end of the holding part remote from the first main link. As the folding top is opened, the first roof part can be pivoted upward and rearward about the first pivot point, with the result that an inner side of the front bow, which faces the interior of the vehicle when the folding top is closed, faces vertically upward when the folding top is completely opened. At a first end remote from the first main link and the second main link, a coupler rod extending substantially parallel to the holding part is pivoted to a first end of a first auxiliary link, which is connected pivotably to the first roof part at a second end. A pivoting motion of the first roof part can thus be controlled by a mutually parallel relative motion of the coupler rod and the holding part. 
     DE 102 43 070 A1 describes a folding top arrangement for a convertible in which a first roof part, which is at the rear in relation to the direction of travel, is pivotally attached to the vehicle body by means of a first, rear, roof part link and a second, front, roof part link. The first roof part can be pivoted forward in relation to the direction of travel. For this purpose, the vehicle body, the first roof part, the first roof part link and the second roof part link together form a four-bar arrangement. The second roof part link is designed as a knee lever and has a long first link arm, which attaches the first roof part pivotally to the vehicle body, and a short second link arm, which is arranged at an angle to the first link arm. The second link arm forms a first auxiliary link of a further four-bar arrangement. The further four-bar arrangement comprises a second auxiliary link, which is arranged so as to intersect with the first auxiliary link and is pivotally attached to the vehicle body at a first end, and a coupler link, which is connected pivotably to a second end of the first auxiliary link and of the second auxiliary link respectively. 
     DE 101 33 957 A1 describes a three-part rigid-shell folding top for a convertible. The folding top comprises a first roof part, which is at the front in the direction of travel, a second, central, roof part and a third roof part, which is at the rear in the direction of travel. The central roof part is mounted pivotably on the vehicle body by means of a main link mechanism designed as a four-bar. The central roof part has an extension which points forward in the direction of travel, and the central roof part and the extension together form a holding part for a kinematic linkage which holds the first roof part. The kinematic linkage comprises a first link and a second link, the holding part, the first link, the second link and the first roof part together forming a four-bar arrangement, the ground link of which is the holding part and the coupler of which is the first roof part. 
     DE 101 50 218 A1 describes a rigid-shell folding top for a convertible comprising a first, front, roof part, a second, central, roof part and a third, rear, roof part. The second roof part is pivotally attached to the vehicle body by means of a main link mechanism designed as a four-bar. The first roof part is pivotally attached to a holding part comprising the central roof part by means of a first kinematic linkage, which comprises a first, front, roof part link, and a second, rear, roof part link. The first roof part link is connected pivotably to the first roof part at a first pivot point and is connected pivotably to an extension of the central roof part, said extension pointing forward in the direction of travel, at a second pivot point. The first link mechanism furthermore comprises an auxiliary link and a coupler link. The auxiliary link is designed as a toggle and is connected pivotably at a first end to the extension of the central roof part and is connected pivotably at a second end to a first end of the coupler link. A second end of the coupler link is connected pivotably to a section of the first roof part link which extends beyond the second pivot point. The extension of the central roof part, the first roof part link, the auxiliary link and the coupler link together form a four-bar arrangement, the ground link of which is the extension of the central roof part and the coupler of which is the coupler link. The four-bar arrangement is used to improve the introduction of torque into the first roof part link, for which purpose a drive rod engages on the auxiliary link. 
     DE 102 43 085 A1 describes a three-part rigid-shell folding top for a convertible, in which a first roof part, which is at the front in the direction of travel, is pivotally attached to a holding part comprising a second, central, roof part by means of a first kinematic linkage. The first kinematic linkage comprises a first, front, roof part link and a second, rear, roof part link, which are each connected pivotably at a first end to the holding part and pivotably at a second end to the first roof part. The kinematic linkage furthermore comprises a first auxiliary link and a second auxiliary link. The first auxiliary link is connected pivotably at a first end to the first roof part link and at a second end to a first end of the second auxiliary link. The second auxiliary link is connected pivotably to the holding part at a second end, with the result that the holding part, the first roof part link, the first auxiliary link and the second auxiliary link together form a four-bar arrangement, the ground link of which is formed by the holding part and the coupler of which is formed by the first auxiliary link. 
     SUMMARY OF THE INVENTION 
     It is an object of the invention to specify a folding top arrangement for a convertible which allows roof parts to be deposited in a space-saving manner in the completely opened position of the folding top. 
     It is an further object of the invention to specify a folding top arrangement which allows roof parts to be deposited in securely fixed positions. 
     According to a first aspect of the invention, these objects are achieved by a folding top arrangement for a convertible, comprising a first roof part, and a holding part, wherein the first roof part is arranged in front of the holding part when the folding top is closed, wherein the first roof part can be pivoted rearward over the holding part, wherein the first roof part is mounted on the holding part by means of a drivable first kinematic linkage, wherein the first kinematic linkage comprises a first, front, roof part link, a second, rear, roof part link, a first auxiliary link and a second auxiliary link, wherein the holding part, the first roof part link, the first auxiliary link and the second auxiliary link together form a first four-bar arrangement, wherein the holding part forms a ground link of the first four-bar arrangement, and wherein the first roof part link forms a coupler of the first four-bar arrangement. 
     According to a further aspect of the invention, these objects are achieved by a support arrangement for fixing a roof part relative to a holding part of a folding top arrangement, comprising a gripping element that can be brought into engagement with the roof part, and a kinematic control mechanism that guides the gripping element, wherein the gripping element can be moved by means of the kinematic control mechanism between a position in engagement with the roof part and a position released from the roof part, and wherein a movement of the gripping element can be coupled to a movement of the roof part. 
     By virtue of the fact that the first roof part link forms a coupler of the first four-bar arrangement, the first roof part link can advantageously be moved over a relatively large spatial area relative to the holding part. In particular, that end of the first roof part link which is adjacent to the holding part can be moved vertically upward and rearward relative to the holding part, starting from the completely closed position of the folding top, by means of the first auxiliary link and of the second auxiliary link. This advantageously makes it possible to move the first roof part link into a virtually horizontal position substantially parallel to the holding part when the first roof part has been moved fully to the rear, even when an obstacle that has at least one vertically upward component of extension and limits the pivoting travel of the first roof part link is arranged on the holding part. A large distance in a horizontal direction between the obstacle and the pivotal attachment of the first roof part link to the holding part is rendered unnecessary by the upward and/or rearward movement of the pivotal attachment point of the first roof part link, with the result that, in comparison with a conventional folding top, in which the first roof part link is pivotally attached to the holding part directly at a pivot point and therefore cannot be moved away from the latter, the required forward extent of the holding part to accept the first roof part link is considerably reduced. The arrangement of the first roof part in front of the holding part and the possibility of pivoting the first roof part rearward over the holding part encompass both an arrangement of the first roof part in front of the holding part in relation to the direction of travel of the convertible, in which the pivotability of the first roof part toward the rear includes pivotability at least predominantly counter to the direction of travel, and an arrangement of the first roof part in front of the holding part in relation to a direction counter to the direction of travel of the convertible, in which the pivotability of the first roof part toward the rear includes pivotability at least predominantly in the direction of travel. In the case of a folding top with a plurality of roof parts, the first roof part can thus be designed as a roof part which is at the front, a roof part which is at the rear or a roof part which is arranged between other roof parts in relation to the direction of travel of the convertible. The first four-bar arrangement preferably comprises only the pivot points of the first auxiliary link and the second auxiliary link with respect to the first roof part and the holding part respectively. However, it has to be understood that further pivot points can be provided, the first four-bar arrangement thus forming, in particular, part of a seven-bar arrangement or of a multi-bar arrangement of some other configuration. It is expedient for the first kinematic linkage to be driven by engagement of a drive element on the first four-bar arrangement, and a leverage ratio of the drive element at the point of engagement on the four-bar arrangement is preferably chosen so that a pivoting motion of the first roof part can be driven with little expenditure of force, starting either from the completely closed position of the folding top or from the completely opened position of the folding top. 
     Preferably, it is possible to arrange the first auxiliary link and the second auxiliary link in a position in which they intersect. This advantageously makes it possible to impose a rotary motion on the first roof part link over a particularly large angular range in order to allow a large pivoting travel of the first roof part. It has to be understood that the first auxiliary link and the second auxiliary link can expediently be arranged parallel to one another with respect to their pivoting plane and/or can be designed so as to be offset in a direction perpendicular to their pivoting plane in order to facilitate or allow intersection. 
     The folding top arrangement expediently comprises a kinematic drive mechanism, which drives the first kinematic linkage. The kinematic drive mechanism preferably comprises a first drive link, a second drive link and a coupler rod, and, in a first preferred embodiment, the first drive link is coupled rigidly either to the first auxiliary link or to the second auxiliary link. A pivoting motion of the first roof part can thus be controlled directly by pivoting the first drive link. The rigid coupling of the first drive link with either the first auxiliary link or the second auxiliary link can be provided either by a rigid connection between a drive link and an auxiliary link that are provided fundamentally as separate components or by means of a one-piece design of the drive link and the auxiliary link, e.g. as a knee lever. It is particularly advantageous for the first drive link to be guided at least predominantly parallel to either the first auxiliary link or the second auxiliary link as the first roof part is pivoted. According to a second, likewise preferred, embodiment, the holding part, one of the first auxiliary link and the second auxiliary link, the first drive link and the second drive link together form a four-bar drive arrangement, in which the coupler rod is pivotally attached at a pivot point of the four-bar drive arrangement. It is expedient if the coupler rod engages on the first drive link, the second drive link or the common pivot point of the first drive link and the second drive link in a region situated at a distance from the holding part. This embodiment advantageously allows great mobility of the coupler rod relative to the elements of the first kinematic linkage and simultaneously allows a sufficiently large torque to be introduced into the first kinematic linkage. 
     The folding top preferably comprises a second roof part, the second roof part expediently being mounted on the holding part by means of a drivable kinematic linkage. 
     The second roof part is expediently arranged behind the holding part when the folding top is closed, and the second roof part can preferably be pivoted forward over the holding part. In a first preferred embodiment in this context, the first roof part and the second roof part together cover the interior of the convertible completely when the folding top is closed. According to another, likewise preferred, embodiment, at least one further roof part is provided in addition to the first roof part and the second roof part. The at least one roof part can be provided between the first and the second roof part when the folding top is closed. By virtue of the fact that the first roof part can be pivoted rearward over the holding part and the second roof part can be pivoted forward over the holding part, compact stacking of the roof parts, preferably in an alignment of a respective camber of the roof parts in the same direction, can be achieved when the folding top is completely opened. For this purpose, the second roof part can preferably be pivoted into a position above the first roof part. Particularly when space conditions in the deposition area for the roof parts render it expedient, the first roof part can be provided so as to be pivotable into a position above the second roof part. It is expedient if the second roof part comprises a rear window of the convertible. 
     The second kinematic linkage preferably comprises a third roof part link and a fourth roof part link, the holding part, the second roof part, the third roof part link and the fourth roof part link together forming a second four-bar arrangement. This advantageously enables the second roof part to be moved over a relatively large pivoting range by means of the second kinematic linkage and to be pivoted into a deposition position in which it completely covers the holding part and preferably also the first roof part. It has to be understood that pivotal attachment by means of a link pair corresponding to the first auxiliary link and the second auxiliary link can be provided in the case of at least one of either the third roof part link and the fourth roof part link. If a third roof part is provided, which is arranged between the first roof part and the roof part, an extent of a second mounting section of the holding part to accept the third roof part link and the fourth roof part link can thus be shortened in its rearward extent. 
     The second kinematic linkage is preferably positively coupled to the kinematic drive mechanism, and by this means a common activation of the first roof part and the second roof part in a definable time sequence is advantageously achieved. This embodiment furthermore advantageously makes it possible for the first and the second roof part to be driven in common by means of just one drive unit, which can be designed as a rotary motor or a linear drive unit, for example. 
     It is particularly preferred that the coupler rod is pivotally attached to one of the third roof part link and the fourth roof part link. This allows direct coupling of the first kinematic linkage and the second kinematic linkage, ensuring that a movement of the first roof part and the second roof part is driven and controlled directly in common. 
     The folding top arrangement preferably comprises a support arrangement for fixing the first roof part in the opened position of the folding top. The support arrangement, which particularly preferably engages on the first roof part in a rear area of the latter, advantageously allows immovable support for the first roof part in the deposited position, thus excluding or at least reducing unwanted vibration of the first roof part and the associated noise generation and increased wear produced during driving, especially by shocks on the convertible. 
     The support arrangement preferably comprises a catch hook that can be moved relative to the holding part. It is particularly preferred that the catch hook be mounted on the holding part by means of a first support link and a second support link, the holding part, the catch hook, the first support link and the second support link together forming a four-bar. The catch hook can thus be moved along a relatively large pivoting path and can be pivoted in an advantageous manner into an inoperative position in a region close to other parts of the second kinematic linkage, especially when the folding top is completely closed. The catch hook is preferably coupled to the second kinematic linkage by means of a control arrangement. This ensures direct coupling of the movement of the catch hook to the movement of the second roof part, thus making it possible to dispense with a separate drive means and a separate control device for the catch hook. It is particularly preferred that the control arrangement be designed as a multi-bar arrangement. Here, the control arrangement can advantageously be arranged in a position beyond dead center in the opened position of the folding top, thus ensuring that the catch hook is secured against unwanted pivoting and that the first roof part is supported in a stable manner. 
     The folding top arrangement preferably comprises at least one third roof part mounted immovably on the holding part. Provision is preferably made here for the holding part to have a mounting section, which projects forward beyond the third roof part, and for the first kinematic linkage to be mounted completely in the first mounting section. In this way, which is very particularly advantageous, both the first roof part link and the second roof part link can be arranged in a first mounting region of the holding part, making the involved recessing of the second roof part link, in the third roof part for example, unnecessary. As an alternative or in addition, provision can be made for the holding part to have a second mounting section, which projects rearward beyond the third roof part, and for the second kinematic linkage to be mounted completely in the second mounting section. 
     The first roof part, the second roof part and the third roof part are expediently deposited with a camber being oriented in the same direction when the folding top is opened. In a first, preferred, embodiment, the first roof part, the second roof part and the third roof part are each designed as rigid shell components and, when the folding top is closed, outward-facing outer surfaces of the shell components can already directly form an outer skin of the folding top. It has to be understood that at least parts of the first roof part, the second roof part and the third roof part can also be covered or spanned with a folding top cloth or that at least some of the group comprising the first roof part, the second roof part and the third roof part can be designed as frame components carrying a folding top cloth. 
     Independently of the above, a further aspect of the invention relates to a support arrangement for fixing a roof part relative to a holding part of a folding top arrangement, in which the support arrangement comprises a gripping element that can be brought into engagement with the roof part, in which a kinematic control mechanism that guides the gripping element is provided, in which the gripping element can be moved by means of the kinematic control mechanism between a position in engagement with the roof part and a position released from the roof part, and in which a movement of the gripping element can be coupled to a movement of the roof part. 
     Further advantages and features of the invention will become apparent from the following description of preferred illustrative embodiments of the invention. 
     The invention is explained in greater detail below with reference to the attached figures by means of two illustrative embodiments of a folding top arrangement according to the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a first illustrative embodiment of a folding top arrangement according to the invention with the folding top completely closed. 
         FIG. 2  shows the folding top arrangement from  FIG. 1  in a schematic representation, in which, in particular, links of the folding top arrangement are shown schematically. 
         FIG. 3  shows the folding top arrangement from  FIG. 1  in a partially opened intermediate position. 
         FIG. 4  shows the folding top arrangement in the intermediate position in accordance with  FIG. 3  in a schematic view. 
         FIG. 5  shows the folding top arrangement from  FIG. 1  with the folding top completely opened. 
         FIG. 6  shows the folding top arrangement in the completely opened position in accordance with  FIG. 5  in a schematic view. 
         FIG. 6   a  shows an enlargement of the illustration from  FIG. 6 , with links of a conventional four-bar arrangement for the first roof part additionally being shown. 
         FIG. 7  shows a second illustrative embodiment of a folding top arrangement according to the invention with the folding top completely closed. 
         FIG. 8  shows the folding top arrangement from  FIG. 7  in a schematic representation. 
         FIG. 9  shows the folding top arrangement from  FIG. 7  in a partially opened intermediate position. 
         FIG. 10  shows the folding top arrangement in the intermediate position in accordance with  FIG. 9  in a schematic view. 
         FIG. 11  shows the folding top arrangement from  FIG. 7  with the folding top completely opened. 
         FIG. 12  shows the folding top arrangement in the completely opened position in accordance with  FIG. 11  in a schematic view. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  to  FIG. 6  show a first illustrative embodiment of a folding top arrangement  100  according to the invention. The folding top arrangement  100  comprises a first roof part  101 , which is at the front in relation to the direction of travel, a second roof part  102 , which is at the rear in relation to the direction of travel, and a third, central, roof part  103 .  FIG. 1 ,  FIG. 3  and  FIG. 5  each show the folding top arrangement  100  in a side view, in which the roof parts  101 ,  102 ,  103  and a kinematic roof linkage that connects the roof parts  101 ,  102 ,  103  to one another can be seen. The kinematic roof linkage is arranged symmetrically on each side of the vehicle, but only links provided on the left hand side of the vehicle in relation to the direction of travel are shown in  FIG. 1  to  FIG. 6  respectively. In the illustration in accordance with  FIG. 2 ,  FIG. 4  and  FIG. 6 , the folding top arrangement  100  is in each case shown in a folding top position corresponding to the illustration in accordance with  FIG. 1 ,  FIG. 3  and  FIG. 5 , but links of the kinematic roof linkage are represented only schematically. Links which have a total of just two pivot points are represented as a straight line between the pivot points. Links which are connected to other components by more than two pivot points are represented schematically as closed hatched polygons in which each pivot point forms one corner of the polygon. A holding part  104  visible in  FIG. 1 ,  FIG. 3  and  FIG. 5  is not shown in  FIG. 2 ,  FIG. 4  and  FIG. 6 . Common pivot points of elements that can each be moved relative to the holding part  104  are represented as circles in  FIG. 2 ,  FIG. 4  and  FIG. 6 , while pivot points which connect one element of the kinematic roof linkage to the holding part  104  are represented as triangles. As is readily apparent, for example, from a comparison of  FIG. 3  and  FIG. 4 , the links represented schematically as straight lines in  FIG. 4  are frequently designed with a single or multiple offset and curvature. It has to be understood that the links can be curved or offset not only in the illustrated plane of the drawing but also in a direction perpendicular to the plane of the drawing. 
     As is readily apparent especially in  FIG. 3  and  FIG. 5 , the third roof part  103  is mounted immovably on the holding part  104 . In the present case, the holding part  104  is designed as a metal part with multiple offsets extending substantially in the direction of travel. The third roof part  103  extends across the interior of the vehicle in the transverse direction of the vehicle and is mounted on the holding part  104  in the region of the vehicle side face. The holding part  104  has a first mounting section  105 , which extends forward beyond the third roof part  103  in the direction of travel, and a second mounting section  106 , which extends beyond the third roof part  103  counter to the direction of travel. 
     The first roof part  101  is mounted movably on the holding part  104  in the region of the first mounting section  105  by means of a first kinematic linkage  107 . As can be seen by comparing the illustration in  FIG. 1 ,  FIG. 3  and  FIG. 5 , the first roof part  101  can be pivoted rearward in a direction counter to the direction of travel, starting from the completely closed position of the folding top arrangement  100  illustrated in  FIG. 1 , into a position above the third roof part  103 . The pivoting motion of the first roof part  101  is guided by means of the first kinematic linkage  107 . The first kinematic linkage  107  comprises a first roof part link  108 , which is at the front in relation to the direction of travel, and a second, rear, roof part link  109 . The first roof part link  108  and the second roof part link  109  are each pivoted to the first roof part  101  at adjacent points at a first end remote from the holding part  104 . At its second end, the end adjacent to the holding part  104 , the first roof part link  108  has a first pivot point  110  and a second pivot point  111 . A first auxiliary link  112  with a first end remote from the holding part  104  and a second end adjacent to the holding part  104  is pivoted at its first end to the first roof part link  108  at the first pivot point  110 . The first auxiliary link  112  is pivotally attached to the holding part  104  at its second end at a third pivot point  113 . A second auxiliary link  114 , which in the present case is designed as a first link arm of a knee lever  115 , is pivoted to the first roof part link  108  at a first end, the end remote from the holding part  104 , at the second pivot point  111 . The auxiliary link  114  is furthermore attached pivotably to the holding part  104  at a fourth pivot point  116 . The fourth pivot point  116  is arranged in a connection area between the first link arm and a second link arm of the knee lever  115 . The holding part  104 , the first roof part link  108 , the first is auxiliary link  112  and the second auxiliary link  114  together form a first four-bar arrangement, the pivot points of which are formed by the first pivot point  110 , the second pivot point  111 , the third pivot point  113  and the fourth pivot point  116 . Here, the holding part  104  forms a ground link and the first roof part link  108  forms a coupler of the first four-bar arrangement. As is readily apparent especially in  FIG. 1  and  FIG. 2 , the first auxiliary link  112  and a second auxiliary link  114  are arranged in a position in which they are substantially parallel to one another and substantially horizontal in the completely closed position of the folding top. As is furthermore readily apparent in  FIG. 3  and  FIG. 4 , when the first four-bar arrangement is pivoted into the intermediate position the first auxiliary link  112  and the second auxiliary link  114  are pivoted into a position in which they intersect, with the result that the first roof part link  108  forming the coupler of the first four-bar arrangement is moved into a substantially vertical position. Finally, as can be seen in  FIG. 5  and  FIG. 6 , the first auxiliary link  112  and the second auxiliary link  114  are furthermore arranged so as to intersect one another in the completely opened position of the folding top, the first roof part link  108  being arranged in a position in which it extends substantially horizontally rearward. The first roof part link  108  can therefore advantageously be moved through a pivoting angle of almost 180 degrees between the completely closed position of the folding top and the completely opened position of the folding top by means of the first four-bar arrangement. Starting from the closed position of the folding top, there is furthermore a vertically upward and rearward movement of the first pivot point  110  and of the second pivot point  111 . 
     At its end remote from the first roof part  101 , the second roof part link  109  is pivotally attached directly to the holding part  104 . When the first roof part  101  is pivoted, the second roof part link  109  is guided at all times substantially parallel to the first roof part link  108 . 
     Pivoting of the first kinematic linkage  107  and hence pivoting of the first roof part  101  between the completely closed position of the folding top and the completely opened position of the folding top can be driven by means of a kinematic drive mechanism  117 . The kinematic drive mechanism  117  comprises a first drive link  118 , a second drive link  119  and a coupler rod  120 . In the present case, the first drive link  118  is designed as the second link arm of the knee lever  115  and extends from the fourth pivot point  116  to that end of the second link arm of the knee lever  115  which is remote from the holding part  104 . The second drive link  119  is designed as a short straight link and has a first end, which is adjacent to the first drive link  118 , and a second end, which is adjacent to the coupler rod  120 . At its first end, the second drive link  119  is pivoted to the first drive link  118  and, at its second end, it is pivoted to the coupler rod  120 . In the present case, the coupler rod  120  extends substantially in a horizontal direction and substantially parallel to the holding part  104 . By movement of the coupler rod  120  in a horizontal direction and toward the rear, counter to the direction of travel, a force is exerted on the first drive link  118  via the second drive link  119 , as a result of which a torque is exerted on the knee lever  115 . In corresponding fashion, pivoting of the first four-bar arrangement and hence of the first kinematic linkage  107  can be driven by movement of the coupler rod  120  in a horizontal direction. 
     The second roof part  102  is mounted on the second mounting section  106  of the holding part  104  by means of a second kinematic linkage  121 . The second kinematic linkage  121  comprises a third roof part link  122 , which is at the front in relation to the direction of travel, and a fourth roof part link  123 , which is at the rear in relation to the direction of travel. The third roof part link  122  and the fourth roof part link  123  are each pivotally attached to the second roof part  102  at a first end, which is remote from the holding part  104 , and, at their second end, which is adjacent to the holding part  104 , they are each pivoted to the second mounting section  106  of the holding part  104 . Thus, the holding part  104 , the second roof part  102 , the third roof part link  122  and the fourth roof part link  123  together form a second four-bar arrangement, by means of which, starting from the completely closed position of the folding top, the second roof part  102  can be pivoted forward and into a position above the third roof part  103 . The third roof part link  122  has an extension which projects beyond the point of pivotal attachment to the holding part  104  and to which the coupler rod  120  is pivotally attached. By means of a driven movement of the coupler rod  120  in a horizontal direction, the first roof part  101  and the second roof part  102  can thus be pivoted in a synchronized manner relative to one another. 
     Arranged in the region of the second mounting section  106  is a support arrangement  124  which, when the folding top is completely opened, engages on the first roof part  101  and holds the latter in the position in which it is laid on top of the third roof part  103  in order to avoid unwanted vibration or movement of the first roof part  101  owing to shocks while the convertible is being driven. The support arrangement  124  comprises a gripping element  125 , which is designed as a catch hook, a first support link  126  and a second support link  127 . The first support link  126  and the second support link  127  are each pivotally attached to the gripping element  125  at a first end and to the holding part  104  at a second end. Thus, the holding part  104 , the gripping element  125 , the first support link  126  and the second support link  127  together form a third four-bar arrangement, by means of which the gripping element  125  can be moved relative to the holding part  104 . The first support link  126  has an extension which projects beyond the point of pivotal attachment to the holding part  104  and on which a first end of a control link  128  of a control arrangement  129  engages. At a second end remote from the first end the control link  128  is pivoted to the coupler rod  120 . The support arrangement  124  can thus be driven directly by the coupler rod  120 . In the completely opened position of the folding top, the gripping element  125  engages on a support pin  134  attached to the first roof part  101  and holds the first roof part  101  in the completely opened position against vibration or similar unwanted movement. 
     In the region of the second kinematic linkage  121 , the kinematic drive to mechanism  117  has a third drive link  130  and a fourth drive link  131 . At a first end, the third drive link  130  engages in a pivoted manner on the third roof part link  122  and, at a second end, is connected to a first end of the fourth drive link  132  at a drive pivot point  133 . A second end of the fourth drive link is mounted in a pivoted manner on the holding part  104 . A piston rod of a drive unit  132  designed as a piston-cylinder drive unit is furthermore pivotally attached at the drive pivot point  133 , said drive unit being supported on the holding part  104  at an end which is remote from the drive pivot point  133  and which is fixed to the cylinder. Actuation of the drive unit  132  changes the length of the part of the piston rod which projects from the cylinder, enabling pivoting of the third roof part link  122  and hence movement of the coupler rod  120  to be driven via the third drive link  130 . 
     The folding top arrangement functions as follows: 
     Starting from the completely closed position of the folding top, in which the first roof part  101  is fixed against a cowl panel of the front windshield of the convertible (not shown), and in which the first roof part  101 , the second roof part  102  and the third roof part  103  are arranged together, adjoining one another, above the interior of the vehicle and cover the latter completely, actuation of the drive unit  132  can be used to initiate a movement of the coupler rod  120  in a substantially horizontal direction counter to the direction of travel and hence synchronous pivoting of the first roof part  101  rearward and of the second roof part  102  forward until the second roof part  102 , the first roof part  101  and the third roof part  103  have been brought together one above the other with a camber being oriented in the same direction in a roof part stack. As is readily apparent especially in  FIG. 2 ,  FIG. 4  and  FIG. 6 , the first roof part link  108  and the second roof part link  109  each pivot through an angular range of almost 180 degrees during the movement of the first roof part  101 . During this process, the first, front, roof part link  108  is guided relative to the holding part  104  at its second end, that adjacent to the holding part  104 , into a position shifted vertically upward and counter to the direction of travel, enabling the first roof part link  108  to be moved into a substantially horizontal position without colliding with the central roof part  103 . As is readily apparent especially in  FIG. 6   a , the pivotal attachment of the first roof part link  108  by means of the first auxiliary link  112  and of the second auxiliary link  114  makes possible a significant reduction in the extent of the first mounting section  105  beyond the region of the third roof part  103  since a conventional four-bar arrangement of the first roof part on the holding part  104  would necessitate pivotal attachment of the two symbolically indicated conventional roof part links  108 ′,  109 ′. The extent of the holding part  104  in the horizontal direction is thus significantly reduced, leading to a significantly smaller deposition space for the roof part stack in the rear area of the convertible. 
     Driven by the coupler rod  120 , a movement of the gripping element  125  into a position of engagement with the support pin  134  of the first roof part  101 , in which the first roof part is fixed on the holding part in the region of its rearward end in relation to the direction of travel, takes place synchronously with the movement of the first roof part  101  and the second roof part  102 . 
     The sequence of motion of the first roof part  101 , the second roof part  102  and the third roof part  103  as illustrated in  FIG. 1  to  FIG. 6  shows only the formation of the roof part stack. The holding part  104  is pivotally attached to the vehicle body by means of a main four-bar arrangement (not shown) and can be pivoted from the position in which it is arranged centrally above the interior of the vehicle and which is associated with the closed position of the folding top into a deposition area in the rear of the convertible, and, in comparison with the closed position of the folding top, the orientation of the roof parts  101 ,  102 ,  103  remains substantially the same. The formation of the roof part stack can be either fully concluded before the beginning of a deposition movement of the holding part  104  in the rear area or can be at least partially simultaneous with the deposition movement of the holding part  104  in the rear area. As an alternative to the linear drive  132 , the movement of the coupler rod can be coupled to a pivoting motion of the main four-bar carrying the holding part  104  in order to drive the pivoting motion of the first roof part  101  and the second roof part  102 . 
       FIG. 7  to  FIG. 12  show a second illustrative embodiment of a folding top arrangement  200  according to the invention. Here, components that are identical or have the same function are provided with a reference sign incremented by  100  in comparison with the first illustrative embodiment. In the text which follows, the focus will be primarily on the differences between the second illustrative embodiment and the first illustrative embodiment. 
     As is readily apparent especially in  FIG. 9  and  FIG. 10 , the kinematic drive mechanism  217  in accordance with the second illustrative embodiment has a first drive link  218  which can be moved relative to the second auxiliary link  212 , the first drive link  218  being pivotally attached at a first end to the first pivot point  210  of the first roof part link  208  and being connected at its second end to a second drive link  219 , which is, in turn, pivotally attached to the holding part  204 . The coupler rod  220  is pivotally attached to the common pivot point of the first drive link  218  and the second drive link  219 . Accordingly, the first drive link  218  is not designed as a link arm of a knee lever but as a short link. The first auxiliary link  212  and the second auxiliary link  214  are furthermore arranged in such a way that they intersect one another as the first roof part  201  is pivoted rearward. 
     The kinematic drive mechanism  217  in accordance with the second illustrative embodiment advantageously has improved introduction of force by the coupler rod  220  into the first kinematic linkage  107  when driving the movement of the first roof part  201  out of the completely opened position into the closed position since the first drive link  218 , which transmits a pulling or pushing force of the coupler rod  220  to the first kinematic linkage  209 , is guided and supported by the second drive link  219  in contrast to the second drive link  119  of the first illustrative embodiment, with the result that points of pivotal attachment of the first drive link  218  are subjected to lower loads. 
     Moreover, in the folding top arrangement  200  in accordance with the second illustrative embodiment, no support arrangements corresponding to the support arrangements  124  of the first illustrative embodiment are provided. 
     In the above description, the invention has been explained by means of two preferred illustrative embodiments, in which the second roof part is arranged in a position above the roof part in the completely opened position of the folding top. It has to be understood that it is likewise possible for the first roof part to be arranged in a position above the second roof part with the folding top completely opened, for which purpose, in particular, the longitudinal extent of the first auxiliary link and of the second auxiliary link is adapted or a four-bar arrangement can also be provided for the second roof part link on the holding part. It likewise has to be understood that a multi-bar arrangement can also be provided for the pivotal attachment of the third roof part link and/or the fourth roof part link of the second roof part, in particular in order to shorten a rearward extent of the second mounting section beyond the third roof part. 
     In the two illustrative embodiments of a folding top arrangement  100 ,  200  explained above, the holding part  104 ,  204  is in each case designed as a continuous metal part which carries the third roof part  103 ,  203 . It has to be understood that the holding part can also be constructed in one piece with the third roof part or that two parts separately attached to the third roof part, which extend forward and rearward respectively beyond the third roof part, form the holding part together with the third roof part. 
     The roof parts  101 ,  102 ,  103 ,  201 ,  202 ,  203  in the illustrative embodiments explained above are each designed as rigid shell components. It has to be understood that some or all of the roof parts can also be designed as rigid shell components at least partially covered with folding top cloth or as folding top linkages carrying a folding top cloth.