Joint for modular furniture

A multishelf structure comprising shelves containing at their opposite ends spaced vertically disposed holes, and means for supporting the shelves in spaced parallel relation, one above another, said means comprising spaced parallel columns at the opposite ends of the shelves, said columns extending continuously from the underside of one shelf upwardly through the holes in the one shelf to the underside of the shelf above, but not into the holes therein, and locking means comprising a block at each end of each shelf having contact with the lower side of the shelf, said blocks containing at their upper and lower sides spaced holes offset outwardly with respect to the holes in the shelves, the holes in the top side receiving the portions of the columns extending downwardly through a given shelf and the holes in the lower side receiving the portions of the columns extending upwardly from said shelf into the holes at the lower side of the blocks at the underside of the shelf above such that the shelf at the upper side of a block bends the columns inwardly and the block at the underside of the shelf above bends the columns outwardly.