Connecting devices for frame bars with polygonal cross-sectional shape

摘要

A device (1) for connecting together elongated construction materials has one or more end-surface connecting parts (3) each for being connected to an end surface of one of the materials (10) and a side surface connecting part (5) for receiving and being connected to side surfaces of another one of the materials. Each end-surface connecting part has a bolt-accepting hole (3a) formed for allowing a bolt (7) to pass therethrough and a counter-bored part formed on the reverse side for receiving therein the head of the bolt (7). The side-surface connecting part (5) has an indentation for accepting therein and being connected transversely to another of elongated construction materials. Bolts are passed through holes in the side-surface connecting part (5) to securely attach it to side surfaces of this another elongated construction material (10).