Abstract: A hanger has a support column having a protrusion. The protrusion has a first and a second protrusion formed to be protruding in opposite directions with each other on a second axial line that intersects orthogonally with a first axial line, and a third protrusion formed to be protruding on a third axial line that intersects orthogonally with the first axial line and the second axial line. A link portion has an accommodation portion for engaging and accommodating the protrusion. The hanger is linked with the link portion, such that a revolution within a first prescribed angle range around the first axial line is permitted, and a folding revolution that is a revolution within a second prescribed angle range around the second axial line is permitted when the support column is located at either one of both ends of the first prescribed angle range.

Abstract: A hanger has a support column having a protrusion. The protrusion has a first and a second protrusion formed to be protruding in opposite directions with each other on a second axial line that intersects orthogonally with a first axial line, and a third protrusion formed to be protruding on a third axial line that intersects orthogonally with the first axial line and the second axial line. A link portion has an accommodation portion for engaging and accommodating the protrusion. The hanger is linked with the link portion, such that a revolution within a first prescribed angle range around the first axial line is permitted, and a folding revolution that is a revolution within a second prescribed angle range around the second axial line is permitted when the support column is located at either one of both ends of the first prescribed angle range.