Rectangular framework for shelving - has four vertical corner uprights and is joined by lengthwise and cross-wise supports in which are vertical holes

摘要

The rectangular framework has four vertical corner uprights (1) joined by horizontal lengthwise (2) and crosswise (3) supports. The uprights (1) have square U-shaped cross-sections with the ends of the facing parallel sides (1a, 1b) bent in twice, towards each other and towards the inside, to enclose a vertical hole (1g). The ends of the lengthwise and crosswise supports are oval or ovoid. The walls of the corner uprights have holes (1c, 1d) with inward-bent edges fitting the ends of the lengthwise supports. The cross-support fits into a vertical hole on a level with each lengthwise support. Each lengthwise and crosswise support has a vertical slot (2a, 3a) in its top and bottom half respectively. USE/ADVANTAGE - The framework has stable corner uprights assembled without tools.