| 摘要 |
A universal cross member (18) that can be used with a bed frame or bed rails to provide support for a box spring and mattress. The universal cross member (18) has a straight bar (20) with telescoping ends so that the universal cross member (18) be used even where there are variances in the distance between the side rails (10) and still be fitted to those side rails. A tensioning system is provided to add strength to the universal cross member (18) to eliminate, in almost all instances, the need for some further support of the universal cross member (18) from the floor, such as a caster or a glide. In the system, a tensioning bar (26) has its ends affixed at or near the ends of the straight member (20) and its center contacts a block at a finite distance from the straight member (20) at or about the center of the straight member. By placing the tension bar (26) in a predetermined tension, a force is created that acts through the block (30) against the approximate center of the straight member (20). That tension can be created by pulling the ends of the tensioning bar (26) outwardly near its end. The tension bar (26) thus creates a force against the straight member (20) at its center but also pulls the ends of the straight member (20) inwardly to stress the straight member (20) toward a bowed configuration where the center is bowed away from the direction of the force and the ends bowed in the opposite directions. Thus, the stress counters the weight imposed on the universal cross member by the box spring, mattress and other components supported by the universal cross member (18) and the need for additional support from the floor is eliminated and the universal cross member can be used independent of the height of the side rails from the floor.
|
