Abstract:
A shading system is provided, such as an overhead shading system for a panoramic window of a motor vehicle, which includes, but is not limited to a holding frame for attachment to a motor vehicle body. The holding frame exhibits a cross member, a first longitudinal member joined with the cross member, and a second longitudinal member joined with the cross member, a transverse strip guided so that it can slide from the first longitudinal member and second longitudinal member in order to activate a shading device coupled with the cross member and transverse strip, such as a roller blind or window shade, for at least partially covering a window opening bordered by the holding frame and transverse strip, and a guide connected with the holding frame, in particular a guiding rope.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to German Patent Application No. 10 2011 114 282.0, filed Sep. 26, 2011, which is incorporated herein by reference in its entirety. 
       TECHNICAL FIELD 
       [0002]    The technical field relates to a shading system and a method for assembling a shading system, which can be used in particular to shade the passenger compartment of a motor vehicle. 
       BACKGROUND 
       [0003]    Document DE 10 2008 020 542 A1 describes a shading system for a motor vehicle, in which a shading device designed as a roller blind can be shifted between two parallel longitudinal members of a holding frame. There is a need for simplifying the activation of a shading system. 
         [0004]    Therefore, at least one object is to indicate measures that enable an easy activation of a shading system. In addition, other objects, desirable features and characteristics will become apparent from the subsequent summary and detailed description, and the appended claims, taken in conjunction with the accompanying drawings and this background. 
       SUMMARY 
       [0005]    An embodiment relates to a shading system, in particular an overhead shading system for the panoramic window of a motor vehicle, encompassing a holding frame for attachment to a motor vehicle body. The holding frame exhibits a cross member, a first longitudinal member joined with the cross member, and a second longitudinal member joined with the cross member, a transverse strip guided so that it can slide from the first longitudinal member and second longitudinal member in order to activate a shading device coupled with the cross member and transverse strip, in particular a roller blind or window shade, for at least partially covering a window opening bordered by the holding frame and transverse strip and at least one guide connected with the holding frame, in particular a guiding rope. The transverse strip exhibits a tilting safeguard that can be propped against the guide so as to guide the transverse strip parallel relative to the first longitudinal member and second longitudinal member. 
         [0006]    When shifting the transverse strip, for example in order to decrease or increase the level of shading achieved by the shading device, the tilting safeguard can prevent the transverse strip from tilting between the first longitudinal member and second longitudinal member, which makes the transverse strip smooth-running, and easy to shift without any unnecessary resistance. This enables an easy activation of the shading system. As a result, the transverse strip can be guided parallel relative to the first longitudinal member and second longitudinal member not just on the faces pointing to the longitudinal members, but also between the first longitudinal member and second longitudinal member with the help of the tilting safeguard. Given enough clearance between the transverse strip and longitudinal members, this enables an easy shifting of the transverse strip without tilting. The tilting safeguard can preferably prevent or at least reduce a rotation by the transverse strip around in particular a vertical rotational axis running essentially perpendicular to the longitudinal members and to the cross member. It is especially preferred that the tilting safeguard be able to prevent or at least reduce a rotation by the transverse strip around an in particular horizontal rotational axis running essentially perpendicular to the longitudinal members and essentially parallel to the cross member. It is further preferred that the tilting safeguard be able to prevent or at least reduce a rotation by the transverse strip around an in particular horizontal rotational axis running essentially parallel to the longitudinal members and essentially perpendicular to the cross member. In particular, the tilting safeguard on the guide means can be moved along one or more contact points and/or contact surfaces given a movement by the transverse strip. The shading device is connected in particular with the holding frame and transverse strip, so that a shading element, for example the shading material of a roller blind, can be extended out of the shading device or retracted into the shading device by moving the transverse strip. 
         [0007]    In particular, the at least one guide is passed through the transverse strip, proceeding from a first face of the transverse strip pointing to the first longitudinal member toward a second face pointing to the second longitudinal member, wherein the at least one guide is diverted into a first receiving area of the first longitudinal member by a first deflecting element provided on the first face, in particular by a pivoted deflection roller, and/or into a second receiving area of the second longitudinal member by a second deflection element provided on the second face, in particular by a pivoted deflection roller. As a result, the guide provided in particular with a flexible design can run into a partial region inside the longitudinal member, so that the guide is not visible from outside, and unable to collide with other movable parts, for example with parts of the shading device and/or with linear guiding elements, for example sliders, guided in the respective longitudinal member and connected with a face of the cross member. In particular, the guiding element can be secured at the height of one end of the first longitudinal member, and at the height of an end of the second guiding element pointing away from this end, and be guided through the cross member, between the first longitudinal member and second longitudinal member. In particular, the guiding element can assume an essentially zigzag progression with essentially rectangular deflections. It is especially preferred that two essentially mirror-inverted guide be provided. 
         [0008]    The transverse strip preferably exhibits a movable actuating handle for shifting the transverse strip. The actuating handle is coupled with at least one braking element for decelerating the guiding element on the tilting safeguard, in particular over a flat surface. The actuating handle, once in an activated operating position, at least reduces a braking effect of the braking element. The braking element is pre-tensioned by a spring element for braking purposes, in particular when the actuating handle is in a non-activated normal position. Cross member movement that is undesirable to a vehicle passenger, in particular given a sudden change in acceleration, for example during an accident, can be prevented by the braking element as the result of friction between the tilting safeguard and guiding element, wherein a movement by the actuating handle relative to the remaining transverse strip makes it possible in particular to lift the braking effect, and allow the transverse strip to shift effortlessly. 
         [0009]    It is especially preferred that the actuating handle be largely, in particular essentially completely, arranged in a recessed grip formed by the transverse strip. In particular the actuating handle is guided into the recessed grip in such a way that it can shift essentially parallel to the first longitudinal member and second longitudinal member. As a result, the actuating handle does not explode the contours of the cross member enveloping the recessed grip and jut into a passenger compartment of the motor vehicle, so that the actuating handle does not obstruct a rearward view through the rearview mirror of the motor vehicle. 
         [0010]    In particular, the at least one guiding element is designed as a jacketed, in particular insert molded, guiding rope. In particular the guiding rope is flattened in an abutment region so as to flatly abut against the tilting safeguard. Given an imminent tilting of the transverse strip, the material used for the jacket and/or its geometric configuration allows the guiding element to exert enough of a counter-torque on the tilting safeguard to prevent tilting and force a parallel motion. The jacket is preferably encased only in the abutment region, so that the flattened jacket can abut against the tilting safeguard between the end positions of the transverse strip in longitudinal directions within the overall traveling distance of the transverse strip, and the guiding rope can be deflected outside the abutment region without a jacket in an easy and space-saving manner, for example using mounted deflection rollers. 
         [0011]    The transverse strip preferably exhibits a lower shell and upper shell made out of different materials, in particular predominantly steel and predominantly aluminum. In particular the lower shell is joined with the upper shell through plastic deformation, in particular clinching or shearing/upsetting. The varying materials make it possible to easily optimize the cross member with respect to stiffness, natural resonance behavior and/or weight, wherein the varying materials can be readily joined together with the sandwich construction method. Additionally or alternatively, the upper shell can be joined with the lower shell via welding, adhesive bonding, screwing, riveting, snap-fitting, or the like. 
         [0012]    It is especially preferred for at least one slider guided in the first longitudinal member or second longitudinal member to be connected with the transverse strip, preferably by clipping. As a result, the transverse strip can be easily connected with the at least one slider, wherein several sliders are preferably provided. In particular, the slider can exhibit a material differing from that of the cross member, making it possible to provide a suitable material pairing between the respective longitudinal member and slider, which enables a high resistance to wear at a low frictional resistance. Additionally or alternatively, the slider can be joined through adhesive bonding, screwing, riveting or the like. 
         [0013]    In particular, a shading device equipped with a cross member and transverse strip and designed as a roller blind is provided. The roller blind exhibits a shading material for at least partially covering a window opening bordered by the holding frame and transverse strip. In particular the shading material is laterally lined to form a thickened area, and the lined thickened area is guided in a guiding slot of the first longitudinal member or second longitudinal member. In particular, the guiding slot exhibits a receiving slot pointing toward the window opening, whose height transverse to the direction in which the shading material moves is greater than the thickness of the shading material, but less than the thickness of the lined thickened area. As a result, the shading material can be threaded on a face of the respective longitudinal member in a longitudinal direction, and cannot exit the receiving slot transverse to the longitudinal direction when forces arise during operation, since the thickened area in this case pushes against the material bordering the receiving slot. 
         [0014]    An embodiment relates to a motor vehicle encompassing a motor vehicle body. The motor vehicle body forms a roof opening, in particular one that transitions into a windshield area, and a shading system, which can be designed and further developed as described above. The motor vehicle body exhibits oblong holes running essentially transverse to the first longitudinal member and to the second longitudinal member for attaching the first longitudinal member and/or the second longitudinal member. This makes it easy to activate the shading system of the motor vehicle. The oblong holes can be used to easily connect the holding frame with the motor vehicle body, during which a precise parallel alignment of longitudinal members relative to each other can be taken into account during assembly. As a result, the transverse strip is prevented from tilting on longitudinal members that do not run parallel to each other. 
         [0015]    An embodiment relates to a method for assembling a shading system, which can be designed and further developed as described above, with a motor vehicle body in which an assembly jig for keeping the first longitudinal member parallel to the second longitudinal member is joined with the first longitudinal member and second longitudinal member, after which the holding frame is connected with the motor vehicle body, whereupon the assembly jig is separated from the first longitudinal member and second longitudinal member. As a result, the holding frame can in particular have an essentially U-shaped configuration, so that the motor vehicle can be furnished with a panoramic window that can comprise both a windshield and a roof window for a roof opening. The assembly jig can be used to keep the ends of the longitudinal members pointing away from the cross member spaced a predefined distance apart, so that the longitudinal members can be mounted parallel to each other with a high level of precision, even if oblong holes running transverse to the longitudinal direction of the longitudinal members are provided for attaching the holding frame to the motor vehicle body. After the shading system has been assembled with the motor vehicle body, this ensures that the shading system of the motor vehicle can be easily activated. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]    The present invention will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and: 
           [0017]      FIG. 1  is a schematic, perspective view of a shading system; 
           [0018]      FIG. 2  is a schematic, exploded view of a transverse strip for the shading system from  FIG. 1 ; 
           [0019]      FIG. 3  is a schematic, exploded view of an actuating unit for the cross member from  FIG. 2 ; 
           [0020]      FIG. 4  is a schematic, perspective view of the actuating unit in the installed state; 
           [0021]      FIG. 5  is a schematic, partially open view of the shading system from  FIG. 1 ; 
           [0022]      FIG. 6  is a schematic, detailed view of the transverse strip from  FIG. 2 ; 
           [0023]      FIG. 7  is a schematic, top view of the shading system from  FIG. 1  in a preassembled state; 
           [0024]      FIG. 8  is a schematic, detailed view of a longitudinal member for the shading system from  FIG. 1 ; and 
           [0025]      FIG. 9  is a schematic, exploded view of part of a holding frame for the shading system from  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION 
       [0026]    The following detailed description is merely exemplary in nature and is not intended to limit application and uses. Furthermore, there is no intention to be bound by any theory presented in the preceding background or summary or the following detailed description. 
         [0027]    The shading system  10  depicted on  FIG. 1  exhibits an essentially U-shaped holding frame  12 , which borders a window opening  14 . The holding frame  12  exhibits a cross member  16 , with which a first longitudinal member  18  and second longitudinal member  20  are connected essentially at right angles, so that the first longitudinal member  18  and second longitudinal member  20  are essentially aligned parallel to each other. A transverse strip  22  is joined with the holding frame  12  so that it can shift in a longitudinal direction  24  running parallel to the longitudinal members  18 ,  20 . The transverse strip  22  is unsupported between the longitudinal members  18 ,  20 . The transverse strip  22  exhibits an actuating unit  26  for shifting the transverse strip  22 . Furthermore, sun visors  28  are movably connected with the transverse strip. In the exemplary embodiment shown, the shading system  10  exhibits a shading device  30  configured as a roller blind, which is joined with the cross member  16  and, by way of a shading material  32  pre-tensioned in the longitudinal direction  24 , with the transverse strip  22 . Shifting the transverse strips  22  makes it possible to expose a portion of the window opening  14 , for example to allow natural sunlight into the passenger compartment, or cover it with the shading material  32  as well as transverse strip  22 , so as to at least partially shade the passenger compartment. The shading device  30  can alternatively also exhibit a window shade. 
         [0028]    As depicted on  FIG. 2 , the transverse strip  22  manufactured based on the sandwich construction method can exhibit a lower shell  34  and an upper shell  36  joined with the lower shell  34  via clinching, between which the actuating unit  26  can be fixed in place. The lower shell  34  and upper shell  36  are made out of different materials. For example, the lower shell  34  can essentially consist of aluminum sheet, while the upper shell  36  can essentially be fabricated out of sheet steel, or vice versa. In the exemplary embodiment shown, the transverse strip  22  additionally exhibits a first cover  38  and a second cover  40 , which each can be joined with the lower shell  34  and/or with the upper shell  36 , preferably through clipping, so as to visually mask the interior of the transverse strip  22 . The cross member  16  is further connected with sliders  42 , via which the cross member  16  is linearly guided in the longitudinal members  18 ,  20 . In the exemplary embodiment shown, the sliders  42  are clipped with the upper shell  36 . 
         [0029]    As depicted on  FIG. 3  and  FIG. 4 , the actuating unit  26  exhibits an actuating housing  42 , which forms a recessed grip  46  for an actuating handle  44 , into which the actuating handle  44  can be nearly completely sunk. In particular, the actuating handle  44  is accommodated so that it can shift in the longitudinal direction  24  with the actuating housing  42 . The actuating housing  42  exhibits an essentially rib-shaped tilting safeguard aligned essentially transverse to the longitudinal direction, which in the exemplary embodiment depicted has flatly configured lateral surfaces pointing in the longitudinal direction  24  that can be made to flatly abut against a first guide  50  and a second guide  52 . In the exemplary embodiment shown, the guide  50 ,  52  are designed as a guiding rope, a partial area of which is provided with a respective flat jacket  54 . The flat abutment by the jackets  54  against the tilting safeguard  48  makes it possible to prevent the transverse strip  22  from tilting, so that the transverse strip  22  will not tilt in the longitudinal members  18 ,  20  while shifting the transverse strip  22 . 
         [0030]    In addition, two braking elements  56  are pivoted to the actuating housing  42 , which are each pre-tensioned with a spring element  58  in such a way that, with the actuating handle  44  in a non-actuated, normal position, the jacket  54  of the respective guiding element  50 ,  52  is jammed between the braking element  56  and tilting safeguard  48 . In this position, the transverse strip  22  is frictionally jammed with the guiding elements  50 ,  52 , so that the transverse strip  22  is not shifted even given suddenly arising, strong acceleration forces. The jackets  54  of the guiding elements  50 ,  52  can each be pressed against the tilting safeguard  48  by a cam  60  formed by the respective braking element  56 . In addition, the braking elements  56  exhibit actuating bolts  62  projecting from the actuating handle  44 , against which the actuating handle  44  can strike in an activated operating position so as to turn the braking elements  56 , thereby moving the cam  60  away from the tilting safeguard  48 , and allowing the guiding elements  50 ,  52  to be moved past the tilting safeguard  48  while shifting the transverse strip  22 . If the actuating handle  44  is released after the transverse strip  22  has shifted, the actuating handle  44  can be held in the normal position essentially without rattling with a return spring  64 , for example in the form of a leaf spring, while the force exerted by the spring elements  58  again closes the braking elements  58 , so that the transverse strip  22  can be smoothly locked in the current position. The actuating unit  26  can be used to intuitively shift the transverse strip  22  in both longitudinal directions  24  using just one hand. 
         [0031]    As depicted on  FIG. 5 , for example, the first guide  50  can be fastened to an end of the second longitudinal member  20  pointing away from the cross member  16 , run through the transverse strip  22  over the entire length of the transverse strip  22  transverse to the longitudinal direction  24 , and be connected with the first longitudinal member  18  and/or the cross member  16  at the end of the first longitudinal member  18  pointing toward the cross member  16 . Accordingly, the second guide  52  can be fastened to an end of the first longitudinal member  18  pointing away from the cross member  16 , run through the transverse strip  22  over the entire length of the strip  22  transverse to the longitudinal direction  24 , and be connected with the second longitudinal member  20  and/or the cross member  16  at the end of the second longitudinal member  20  pointing toward the cross member  16 . As a result, the guide  50 ,  52  can be concealed in the longitudinal members  18 ,  20  and transverse strip  22  in a protected position. As depicted on  FIG. 6 , the respective guide  50 ,  52  can be guided between the transverse strip  22  and the sliders  42  clipped with the transverse strip  22  in a longitudinal direction  24 , for example through a U-shaped receiving area of the longitudinal member  18 ,  20 . 
         [0032]    As depicted on  FIG. 7 , the transverse strip  22  can be positioned in comparatively close proximity to the cross member  16  while assembling the shading system  10  with a motor vehicle body  66  of a motor vehicle. An assembly jig  68  is fastened to the ends of the longitudinal members  18 ,  20  pointing away from the cross member  16  in the longitudinal direction  24  opposite the cross member  16 . The length of the assembly jig  68  is selected in such a way as to maintain the parallelism of the longitudinal members  18 ,  20 , even at the forces that arise during assembly. In particular, the assembly jig exhibits centering pins, so that the shading system  10  can additionally be correctly aligned relative to the motor vehicle body  66  in a roof opening  69  formed by the motor vehicle body  66 . Even given a changing vehicle width of the motor vehicle body  66 , this makes it possible to ensure a simple and rapid assembly with mutually parallel longitudinal members  18 ,  20 . After the holding frame  12  has been completely fastened with the motor vehicle body  66 , the assembly jig  68  can be removed from the essentially U-shaped holding frame  12  in the longitudinal direction, so that the transverse strip  22  can be shifted into its position spaced a maximum distance apart from the cross member  16 . 
         [0033]    As depicted on  FIG. 8 , the shading material  32  can be composed of several layers. In the exemplary embodiment shown, the shading material  32  exhibits an underlay  70 , for example which has a bright hue that matches the roof liner of the motor vehicle, and an overlay  72 , for example which has a dark hue that matches the outside paint of the motor vehicle body  66 . For example, the underlay  70  is designed as a thicker material clad with an overlay  72  designed as a thin film. The shading material  32  projects laterally over a receiving slot  74  into a guiding slot  76  of the respective longitudinal member  18 ,  20 . Inside the guiding slot  76 , the receiving material  32  is lined to produce a thickened area  78 . Given tensile forces inwardly directed into the window opening  14 , the lined thickened area  78  can strike against the material of the longitudinal member  18 ,  20  bordering the receiving slot  74 , so that the shading material  32  cannot slip out of the longitudinal members  18 ,  20 . The thickened area  78  can be generated by a welded seam. It is possible to line several layers or even just one portion, for example just a single layer. For example, only the underlay  70  is lined, so that the overlay  70  ends laterally in a pocket formed by the lining. 
         [0034]    As depicted on  FIG. 9 , the respective longitudinal member  18 ,  20  can exhibit an upper section  80  and a lower section  82  separate from the upper section  80 , which can be connected with each other, for example so as to yield the receiving slot  74  for the shading material  32  between the upper section  80  and lower section  82 , and/or a linear slide for the sliders  42  connected with the transverse strip  22  in a receiving area. In particular, the upper section  80  and/or lower section  82  can be joined with an absorption unit  84  as a kind of crash box, so that the forces arising in case of an accident can be absorbed via the plastic deformation of parts of the absorption unit  84 , without having to tolerate any unnecessary plastic deformations of the holding frame  12  or other components of the shading system  10 . This makes it possible to keep down the repair costs incurred in the event of an accident. 
         [0035]    While at least one exemplary embodiment has been presented in the foregoing summary and detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing summary and detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope as set forth in the appended claims and their legal equivalents.