Modular furniture unit for assembly by a wedge

A T-shaped wedge for assembling a furniture unit, comprising:

• a rectangular plate, wherein the edges of the plate define a length direction and a width direction,
• a trapezoid plate, superimposed on the rectangular plate such that a first parallel edge of the trapezoid plate is adjacent to a first width edge of the rectangular plate, and wherein the non-parallel edges are symmetrically tapered along the length direction and in the direction away from the first width edge, and
• a beam, placed at the first width edge, thereby forming the T-shape
• wherein the wedge is configured for frictionally engaging two planes within the furniture unit.

A modular shelving unit for assembly without tools, comprising:

• a) a plurality of frame plates configured to be assembled to form a rectangular outer frame, wherein the inner surface of at least a part of the vertical outer frame plates comprises a first vertical groove,
• b) one or more shelf modules, each shelf module configured to be assembled to form a horisontal shelf within said outer frame, each shelf module comprising:
• two vertical side plates, configured to be placed opposite each other against opposite vertical inner surfaces of the outer frame,
• a horisontal shelf plate configured to be placed on top of the two vertical side plates in a first notch-and-groove engagement with the adjacent vertical side plates, said shelf plate further comprising a second notch at each end of the shelf plate,
• two wedges configured to be received within the apertures formed at each end of the shelf plate between the first vertical groove of the outer frame plate and the second notch at the end of the shelf plate,
• wherein the modular shelving unit is configured such that the installation of the wedge in the aperture displaces the horisontal shelf plate in the horisontal direction transverse to the width of the shelving unit, thereby stabilising the shelf module by compressing the horisontal shelf plate against the outer frame.