Connection device, structural system and shelving unit

A connection device for installing a shelf or a shelf frame on a vertical support equipped with at least one axially extending row of perforations in order to construct a shelving unit, comprising:

• a hanger component with a main body having an engagement portion and a support portion and being designed to be suspended from one of the perforations of the vertical support such that the engagement portion engages behind one of the perforations of the vertical support and the support portion is arranged outside of the aforementioned perforation of the perforations of the vertical support;
• and
• a bracket comprising a housing portion which has a front face designed to rest against the vertical support and a cavity that is shaped so as to receive the support portion of the main body of the hanger component,
• wherein the bracket is equipped with a clamping mechanism which is designed to clamp the housing portion of the bracket together with the vertical support when the cavity of the housing portion of the bracket receives the support portion of the main body of the hanger component and the main body of the hanger component is suspended from the aforementioned perforation of the perforations of the vertical support,
• wherein the clamping mechanism of the bracket comprises a claw part having a first claw,
• the support portion of the main body of the hanger component is equipped with a second claw, and
• the first claw of the claw part of the clamping mechanism of the bracket and the second claw of the support portion of the main body of the hanger component engage one another when the cavity of the housing portion of the bracket receives the support portion of the main body of the hanger component and the main body of the hanger component is suspended from the aforementioned perforation of the perforations of the vertical support.