In general, as shown in the figures, the present invention includes a cross-rail support system  for use with a bed frame。 In FIG。 1。 a bed frame 26 is shown for supporting a box spring and a mattress。 The bed frame 26 includes a pair of side rails 27 and a pair of ends 28 such as a headboard and footboard that are interconnected to form a generally rectangular frame and at least one of the cross-rail support systems  11  according to the invention。  The cross-rail  support system or systems 11 are adapted for engaging the side rails27。 The ends 28 0f the bed frame 26 have additional legs 29 to support the mattress and  although the illustrated bed frame 26 0f FIG。 1 is constructed from wood that the bed frame may be constructed from a variety of materials。 For example, the side rails 27 and/or the ends 28 may be metallic。

   The cross-rail support system 11 includes a pair of elongate beams 12 in a general parallel alignment and a number of leg assemblies 13 and the overall width of the support system 11 is defined by the distance between the two outer ends 14 0f the elongate beams 12。 Advantageously, the leg assembly or assemblies 13 maintain the parallel alignment of the elongate beams 12 and provide the support for the mattress。 Each leg assembly 13 has an elongate tube 15 and a leg structure 16。 Each elongate tube 15 defines at least one interior space 17 for holding the elongate beams 12 and facilitating the sliding of the elongate beams 12 along their lengths relative to each other thereby adjusting the overall width of the support system 11。 The length of the elongate tube 15 provides lateral constraint against the elongate beams 12 which maintains their parallel alignment。 For example, the length of the elongate tube 15 may be five inches。 The interior space or spaces 17 0f each leg assembly 13 also facilitates the advantageous adjustability of the placement of each leg assembly 13 along the length of the

elongate beams 12 independently from any other leg assembly 13 and from the overall width of the support system 11。Each leg structure 16 depends from the elongate tube 15 0f that leg assembly 13 and has a height generally perpendicular to the elongate beams 12。 The leg structure 16 may be welded to the elongate tube 15 as shown or connected in some other manner。

   The height of each leg  structure  16 may be adjustable。  For example, as illustrated, the leg structure 16 may comprise a series of telescoping extensions 18。 where the height of the leg structure 16 is adjusted by moving the extensions 18 in and out of one another。 Further。 as illustrated, the leg structure 16 may have a floor glide 19 with a screw-type stem 20 that engages an insert 21 in the bottom telescoping extension 18a for further adjusting。

  Locking members may be used to fix the height of the leg structure 16。 For example, as illustrated。 the leg assembly 13 may have a series of locking screws 22a。 Specifically, the locking screws 22a may be used by inserting and extending the screws 22a through and into threaded through-holes 23a on the  telescoping extensions 18 and/or other parts of the leg structure so that the ends of the screws 22a tighten against the next inner telescoping extension 18 thereby creating a frictional engagement between the extensions 18 and inhibiting movement between them。

  In another aspect, the locking members may be configured to allow the maximum extension or shortening of the leg structure 16。 As an example and as illustrated。 one or more of the telescoping extensions 18 and/or other parts for the leg structure may have an open ended groove 24 for receiving the next lower locking member。 The groove 24 allows for the shortening on the leg structure 16 without the interference from the locking members。 This advantageously shortens the length of the leg structure 16 for a given maximum extension length, which allows a greater range of adjustability and lower shipping costs。                          。