Abstract:
A window regulator rail, in particular for a motor vehicle, includes a mounting portion and a fastening bolt. The fastening bolt includes an attachment collar and first and second fastening portions that are arranged on opposite sides of the attachment collar. The fastening bolt is releasably and adjustably attached to the mounting portion of the window regulator rail in a predefined position by the first fastening portion. On the second fastening portion, a fastening member is arranged in a mounting position.

Description:
RELATED APPLICATIONS  
       [0001]     The application claims priority to German Application No. 10 2005 008 080.4, which was filed on Feb. 22, 2005.  
       BACKGROUND OF THE INVENTION  
       [0002]     This invention relates to a window regulator rail, in particular for a motor vehicle, and to a mounting of the window regulator rail on the motor vehicle.  
         [0003]     A carriage is mounted on the window regulator rail. An adjustable window or other components of a window regulator are accommodated in the carriage. For a vehicle manufacturer who will mount the window regulator in a vehicle, the window regulator rail is supplied to an assembly line preassembled as much as possible, so that minimal effort can be used to mount the window regulator in the vehicle.  
         [0004]     A commonly used way of mounting a window regulator rail includes screwing the window regulator rail to a mounting lug that is provided on the vehicle for mounting the window regulator rail. For this purpose, a bore is provided in the window regulator rail and the mounting lug, which bore constitutes an elongated hole in one of the window regulator rail and mounting lug. This provides for a precise alignment of the window regulator rail during installation.  
         [0005]     One disadvantage with this mounting method is that the window regulator rail must be aligned during assembly and a separate screw must be supplied to an assembly line.  
       SUMMARY OF THE INVENTION  
       [0006]     It is the object of the invention to create a window regulator rail, as well as an assembly including a window regulator rail and mounting lug, which considerably simplifies the assembly.  
         [0007]     For this purpose, a window regulator rail for a motor vehicle includes a mounting portion and a fastening bolt. The fastening bolt includes an attachment collar and first and second fastening portions that are arranged on opposite sides of the attachment collar from each other. The fastening bolt is releasably and adjustably attached to the mounting portion of the window regulator rail in a predefined position by the first fastening portion. On the second fastening portion, a fastening member is arranged in a mounting position.  
         [0008]     With the subject window regulator rail, all requirements can be satisfied at once. On the one hand, the position and alignment, in which the window regulator rail is mounted in the vehicle, can be specified precisely because the fastening bolt can be attached to the mounting portion of the window regulator rail in a nominal position. This nominal position corresponds to a constructionally specified position, which the fastening bolt must assume theoretically, to ensure that the window regulator rail is mounted in the vehicle in the desired position and alignment. Since the inevitable manufacturing tolerances are distributed around the nominal position in the manner of a Gaussian curve, it can be expected for the majority of the window regulator rails that the fastening bolt is “correctly” arranged in the nominal position. In the few cases in which a readjustment is required, the readjustment can be made, as the fastening bolt is releasably and adjustably attached to the mounting portion. On the other hand, it is not necessary to provide a separate component at the assembly line for the window regulator rail, as the necessary fastening member for mounting on the mounting lug is already part of the second fastening portion.  
         [0009]     Preferably, the mounting portion includes an elongated hole that receives the first fastening portion. This provides for shifting the fastening bolt within limits provided by the elongated hole, so that the fastening bolt can take either the nominal position or, in the case of a readjustment, an individually determined position.  
         [0010]     In accordance with the preferred embodiment, it is provided that the first fastening portion is a threaded bolt with a first nut screwed onto the threaded bolt. This provides a low manufacturing and mounting effort.  
         [0011]     Preferably, the first nut is non-rotatably held at the mounting portion. For instance, an outside surface of the first nut rests against a contact surface of the mounting portion. In this case, no additional measures must be taken to prevent the first nut from rotating when the fastening bolt is mounted at the mounting portion. The first nut could be a square nut, which rests against a bent tab of the mounting portion at the outside surface. A square nut provides a low piece cost.  
         [0012]     In accordance with the preferred embodiment, the second fastening portion is also a threaded bolt with a second nut screwed onto the threaded bolt. This provides for adjustably mounting the window regulator rail and the fastening bolt at the mounting lug in the vehicle with little effort.  
         [0013]     Preferably, the second nut is a self-locking nut. The advantage is that the second nut captively remains in the mounting position, i.e. in that position in which the second fastening portion of the fastening bolt can loosely be inserted into the mounting lug. In other words, the second nut is screwed onto the second fastening portion just so far such that an associated locking ring will bite, and the second nut cannot be released from the second fastening portion during the transport of the preassembled window regulator rail. Only during the assembly of the window regulator rail in the vehicle will the second nut then be screwed further onto the second fastening portion, until the second nut fixes the window regulator rail at the mounting lug. The term “self-locking nut” is also meant to include an assembly including a nut and a separate locking member that prevents the nut from being released due to vibrations, etc.  
         [0014]     In accordance with the preferred embodiment of the invention, the second fastening portion is provided with an engagement portion for a tool at an end facing away from the attachment collar. The engagement portion constitutes a square or hexagon, for example. On the one hand, this provides for retaining the fastening bolt to prevent the fastening bolt from rotating when the second nut on the second fastening portion is tightened. On the other hand, the engagement portion provides for rotating the fastening bolt. As a result, the first fastening portion can be screwed into the first nut when the fastening bolt is mounted for instance in the nominal position, or can slightly be screwed out of the first nut, in order to bring the fastening bolt from the nominal position into an individually determined position, and can then be re-tightened in the first nut.  
         [0015]     The above-mentioned object is also solved by an assembly including a window regulator rail, as mentioned above, and a mounting lug that is mounted on the vehicle. The mounting lug includes a positioning configuration, preferably formed by an indentation, in which the attachment collar is at least partly received. As a positioning configuration, the indentation provides for an automatic positioning of the fastening bolt at the mounting lug and hence for the correct alignment of the window regulator rail in the vehicle. The actual adjustment of the correct position has already been accomplished before the assembly because the fastening bolt was mounted on the mounting portion of the window regulator rail in the nominal position. During the actual assembly of the window regulator rail, no further steps must be taken. Apart from the positioning of the window regulator rail during the assembly, the positioning configuration also has another function. The positioning configuration ensures that the correct position of the window regulator rail is maintained even if the second nut should loosen in operation. Even if the second nut is not completely tightened, the attachment collar cannot leave the indentation. This is only possible after the second nut has been screwed down very far from the second fastening portion.  
         [0016]     Preferably, both the indentation and the attachment collar are circular. This ensures that the attachment collar can be received in the indentation independent of an associated rotary position.  
         [0017]     Preferably, the attachment collar is bevelled towards the second fastening portion. This facilitates the positioning of the attachment collar of the fastening bolt in the indentation, and the attachment collar acts in the manner of an inlet bevel.  
         [0018]     In accordance with the preferred embodiment, the mounting lug has a slot that ends in a middle of the indentation. The fastening bolt is simply laterally inserted into the mounting lug until the attachment collar lies in the indentation. Then, it is only necessary to tighten the second nut, and the window regulator rail is mounted precisely and reliably.  
         [0019]     The above-mentioned object is also solved by a method for mounting a component, in particular for mounting a window regulator rail in a vehicle, which includes the following steps: A fastening bolt is releasably mounted to the component in a nominal position. Then, the component together with the fastening bolt, is mounted in the vehicle, the fastening bolt automatically defining the mounting position of the component. Subsequently, the fastening bolt is attached to the vehicle. Thereupon, it is checked whether the nominal position of the component complies with a geometry of the vehicle. If the position of the component does not comply with the geometry of the vehicle, the fastening bolt is released from the component, the component is adjusted, and the fastening bolt is firmly re-mounted to the component. The particular advantage of this method is, for a majority of the mounted components, such as window regulator rails, the position of the component in the vehicle can already be precisely defined before the actual assembly, while the position nevertheless can newly be adjusted at a later date if necessary. Moreover, reference is made to the advantages mentioned above with respect to the window regulator rail.  
         [0020]     These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0021]      FIG. 1  shows a cross-sectional view of a window regulator rail of the invention, which is mounted on a mounting lug in a vehicle.  
         [0022]      FIG. 2  shows the mounted window regulator rail in a first perspective view.  
         [0023]      FIG. 3  shows the mounted window regulator rail in a second perspective view. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0024]     In  FIGS. 1-3 , a portion of a window regulator rail  5  is shown, which is mounted on a mounting lug  7 . The window regulator rail  5  is shown in a cross-sectional view with one end of the window regulator rail being cut-off. Only a mounting portion  10  of the window regulator rail  5  is relevant for understanding of the invention. The mounting portion  10  is positioned at one end of the window regulator rail  5 . The mounting lug  7  is also shown in a cut-off cross-sectional view; the way in which the mounting lug  7  is mounted in a vehicle, and where the mounting lug  7  is mounted, are not relevant for the understanding of the invention.  
         [0025]     The mounting portion  10  includes an elongated hole  12 , which in the illustrated embodiment extends approximately parallel to a lower edge of the window regulator rail  5 . A first threaded bolt  14  with a first nut  16  screwed onto the first threaded bolt  14  extends through the elongated hole  12 . The first nut  16  is a square nut and rests against a bent edge portion  17  of the mounting portion  10  at one outside surface.  
         [0026]     The first threaded bolt  14  is integrally formed with an attachment collar  18 , which has a circular outer contour. A second threaded bolt  20  is also integrally formed with the attachment collar  18 . The second threaded bolt  20  has a second nut  22  screwed onto the second threaded bolt  20 , which constitutes a self-locking nut. On a side facing the second threaded bolt  20 , the attachment collar  18  has a circumferential bevel  19 .  
         [0027]     The first threaded bolt  14 , the second threaded bolt  20 , and the attachment collar  18  have a rotationally symmetrical design and are arranged coaxially. Together, they form a fastening bolt that includes a first fastening portion, which is associated with the mounting portion  10 , and a second fastening portion, which is associated with the mounting lug  7 .  
         [0028]     At a free end, the second threaded bolt  20  has an engagement portion  24  that constitutes a hexagon shape. The function of the engagement portion  24  will be explained below.  
         [0029]     The mounting lug  7  includes a positioning portion in the form of an indentation  26 , which has a circular contour and is designed as an embossed portion. In the illustrated embodiment, a depth of this embossed portion is approximately equal to a wall thickness of the mounting lug  7 . Proceeding from a bottom of the indentation  26 , an inclined transitional portion extends up to an outside surface of the mounting lug  7 . From an edge of the mounting lug  7 , a slot  28  leads to a middle of the indentation  26 . The width of the slot  28  is slightly larger than a diameter of the second threaded bolt  20 .  
         [0030]     The fastening bolt is mounted at the mounting portion  10  by introducing the first threaded bolt  14  through the elongated hole  12  and screwing the first threaded bolt  14  into the first nut  16 , so that the mounting portion  10  is clamped between the first nut  16  and the attachment collar  18 . The first nut  16  cannot rotate when the first threaded bolt  14  is screwed in, as the first nut  16  is non-rotatably held by the bent edge portion  17 . The required tightening torque is applied by a tool that is placed onto the engagement portion  24 . When the fastening bolt is tightened, it is held in a nominal position which corresponds to that position which it should take in accordance with constructional specifications to ensure that the window regulator rail  5  assumes a required position and alignment in the vehicle. The second nut  22  is loosely screwed onto the second threaded bolt  20  merely to an extent that an associated locking ring will bite and the second nut  22  is captively retained.  
         [0031]     The window regulator rail  5 , preassembled as described below, is mounted in the vehicle by inserting the second threaded bolt  20  into the slot  28  of the mounting lug  7 , until the attachment collar  18  comes to lie in the indentation  26 . The bevel  19  of the attachment collar  18  and the inclined transitional portion of the indentation  26  facilitate the positioning of the attachment collar  18  in the indentation  26 . When the attachment collar  18  is arranged in the indentation  26 , the second nut  22  is tightened until the mounting lug  7  is clamped between the attachment collar  18  and the second nut  22 .  
         [0032]     If it turns out that the window regulator rail  5  is not positioned correctly, although the fastening bolt and hence also the window regulator rail  5  are in the nominal position, the second nut  22  can be released again, the fastening bolt can slightly be screwed out of the first nut  16 , the window regulator rail  5  can be positioned correctly, and then the fastening bolt and the second nut  22  can be re-tightened.  
         [0033]     The cooperation of attachment collar  18  and indentation  26  ensures that the fastening bolt also remains correctly positioned in the indentation  26  when the second nut  22  has not been tightened properly. The attachment collar  18  can only leave the indentation  26  when the second nut  22  has been screwed off very far from the second threaded bolt  20 . This increased constructional safety could possibly eliminate the need for a self-locking nut, and a conventional nut could be used instead.  
         [0034]     The window regulator rail and the mounting thereof as described above are particularly useful for frameless doors of a motor vehicle, in which lowerable windows are not guided in a door frame above a door parapet, but only inside the door parapet. In the case of frameless doors, a particularly high rigidity and precise positioning of the window regulator rails are particularly important, as otherwise the window cannot reliably be urged against an associated seal at a vehicle roof.  
         [0035]     Although a preferred embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.