Abstract:
A file drawer is disclosed where two opposed top edges of the file drawer include pivoting rails which are movable to one of the two positions. The rails in one position are spaced for supporting letter size file jackets and in the other position support metric A4 size file jackets. This arrangement allows the manufacture of common size file drawers which can easily be adjusted for either filing application.

Description:
FIELD OF THE INVENTION 
     The present invention relates to file drawers, and in particular, relates to file drawers having a top rail which is adjustable to accommodate both A4 and letter size file hangers. 
     BACKGROUND OF THE INVENTION 
     Most file drawer systems are designed to receive a series of file folder jackets which are used to suspend a file folder. The file folder jackets have laterally extending tabs which engage rails either side of the file drawer. In this way, each file is individually supported and is movable by sliding the file folder jacket along the rails. 
     File drawers are designed to receive legal size file folders, metric (A4) size folders, or letter size folders. The metric folder is slightly larger than the letter size folder. Unfortunately the variation between A4 size folders and letter size folders, requires that the rail for supporting these jackets must be movable to accommodate either the smaller size letter jacket or the larger A4 jacket. There have been some attempts to have a common support structure to receive letter size or metric size folder jackets. 
     In some existing file drawer systems, the rails for supporting the file folder jackets are movable within a slot and secured at either end of the drawer. This arrangement works well but is not convenient to manufacture. Other arrangements such as U.S. Pat. No. 5,393,136 define a removable structure having two different hanging positions offset relative to a center securement location and the rail is reversible. The structure is not immediately apparent to an end user how it can be adjusted to accommodate different sizes and the end user may not even realize it is capable of adapting to different sizes. 
     There remains a need for a more effective structure to accommodate A4 and letter size file jackets. 
     SUMMARY OF THE INVENTION 
     A file drawer, according to the present invention, has two opposed parallel top edges appropriately spaced for supporting letter size or metric size file hangers therebetween. Each top edge of the file drawer has a pivoting rail extending in a longitudinal direction of the respective top edge. Each pivoting rail is movable inwardly of the respective top edge to define a space for receiving and supporting a letter size file hanger. The rails are also movable outwardly to define a space therebetween for receiving and supporting a metric A4 size file hanger. With this arrangement, the user merely moves the rails to the appropriate location for the required file folder size. 
     According to an aspect of the invention, each pivoting rail in cross section, includes a slot like recess opening onto a divided securing cavity. The divided securing cavity has two sections with a cam member therebetween. The cam member, in combination with a securing edge of the rail, provides a bias urging the top edge of the file drawer into one of the two sections. 
     According to yet a further aspect of the invention, each top rail is an extruded plastic component. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Preferred embodiments of the invention are shown in the drawings, wherein: 
     FIG. 1 is a end view showing a securing rail on the edge of a letter file drawer; 
     FIG. 2 is a view similar to FIG. 1 with the rail position for receiving a metric A4 file hanger; 
     FIG. 3 is a partial perspective view of the rail alone; And 
     FIG. 4 is an end view of a securing rail of an alternate section. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The file drawer generally indicated as  2  has opposed top edges  4 , with each top edge having a thickened edge portion  6 . The adapter support rail  20  has a downwardly opening slot like recess  24  which is forced over the top edge  4  of the rail. The thickened portion  6  of the file drawer is captured within the cavity  22  of the adapter rail  20 . The downwardly directed cam member  28  longitudinally divides the cavity  22  into a first locating cavity  34  and a second locating cavity  36 . As can be seen in FIG. 1, the thickened portion  6  is captured by the lower edge of leg  40  and the cam member  28 . 
     The letter size file hanger  10   a  of FIG. 1 is shown with its support tab  12  placed on the angled flange  30  of the adapter rail  20 . 
     The file drawer  2  is thus suitable for receiving A4 file jackets or letter size file jackets without modification of the drawer. For example, the rail  20  can be set for the most common position for the particular market. In North America, the rail  20  would be set to the letter size position shown in FIG.  1 . The same cabinet could be destined for the European market and the adapter rail  20  would be set to the position of FIG.  2 . In this position, the thickened portion  6  of the top edge  4  of the file drawer  2  is located in the second locating cavity  36 . The leg  40  in combination with the cam  28 , maintains the rail in the set position. The user, if necessary, merely pushes the angled flange  30  to the desired position, forcing the thickened portion  6  of the drawer into the opposite locating cavity. The rail is maintained either in the position of FIG. 1 or in the position of FIG.  2 . 
     FIG. 2 illustrates how the angled flange  30  in a position for receiving A4 file jackets is located outwardly of the file drawer  2 , and the support tab  12  of the A4 hanging folder is appropriately located on the adapter rail  20 . It can be seen that both the adapter rail  20  and the support tab  12  of the metric file hanger are slightly outside the periphery of the file drawer  2 . These file drawers  2  typically include telescopic slide members or other slide arrangements to the outside of the file drawer and as such, the supporting cabinet associated with the file drawer  2  has sufficient clearance to allow the adapter rail  20  to be clear of the interior walls of the cabinet. 
     It is general human nature to try to make a simple adjustment when something does not fit. The user, when faced with a file drawer positioned according to FIG. 1, may recognize that the top rail has a unique configuration and will attempt to force the angled rail  30  outwardly. This motion will result in the rail by camming past cam  28  to locate the thickened portion of the file drawer  2  as shown in FIG.  2 . In addition, the slight angle of the flange  30  in either position will suggest the adjustability of the structure. 
     With the present invention, it has been found that the securing cavity of the adapter rail  20  can be shaped to accommodate a pivoting movement of the adapter rail about the upper edge of the file drawer  2 . The user is not required to remove the adapter rail  20  and the structure of the adapter rail  20  provides a visual suggestion that some adjustable movement of the rail is likely. Note that the two positions of the angled flange are non perpendicular. A distinct camming action biasing the member to one of the two positions provides further confirmation that adjustment is part of the design. 
     The securing rail  20   a  of FIG. 4 is movable to one of two positions as described with respect to rail  20 , however, a larger dividing member  28   a  separates the first locating cavity  34  from the second locating cavity  36 . The rail is now symmetrical and the legs  41  and  43  are longer, and terminate at the retaining slot  45 . In this embodiment, the retaining slot is positioned to allow upward movement of the rail to have divider  28   a  clear the top of the top edge  4  of the file drawer, and to relocate the top edge in the desired locating cavity  34  or  36 . The securing rail  28  a is retained on the top edge of the file drawer during any repositioning of the flange  30   a  to accept A4 or letter size file jackets. 
     The adapter rail  20  is preferrably a plastic extrusion which has more than sufficient structural integrity to support the file hangers and the contents of any files placed in the file hangers. There is excellent support for the rail as the top edge of the file drawer is closely associated with the location of the angled rail  30 . 
     Although various preferred embodiments of the present invention have been described herein in detail, it will be appreciated by those skilled in the art, that variations may be made thereto without departing from the spirit of the invention or the scope of the appended claims.