The invention provides a stone non-curtain hanging piece, a non-curtain unit and a
keel-free non-curtain
system. The stone non-curtain hanging piece comprises a hanging piece body, a non-
metal connector, a
metal connector and a
fastener. The hanging piece body is a T-shaped block composed of a first extruding aluminum
alloy piece and a second extruding aluminum
alloy piece, wherein the first extruding aluminum
alloy piece and the second extruding aluminum alloy piece are fastened into a whole through screws. The front end face of the first extruding aluminum alloy piece and the front end face of the second extruding aluminum alloy piece are respectively provided with a claw, wherein the claws are symmetrically arranged in an inwards inclining mode. The hanging piece body, the non-
metal connector and the metal connector are connected in sequence. The invention further discloses the non-curtain unit provided with the hanging piece, and the non-curtain
system. Firstly, construction can be conducted on a stone non-curtain structure according to a
keel-free hanging and pasting technology, namely, no
keel is used; secondly, the stone non-curtain structure has the cold-bridge and hot-bridge isolation function, the opening collapsing phenomenon on the notch portion of stone is avoided when the stone non-curtain structure is used for a long time, and the overall service life of the stone non-curtain structure is prolonged.