noun
pivot hinge
A hinge that allows a door or lid to swing open by rotating around a vertical axis, often used in traditional Japanese architecture or cabinetry.
この戸は軸吊りで、柱を軸にして回転します。
This door uses a pivot hinge and rotates around the pillar.
蝶番 is a general term for hinges, while 軸吊り specifically refers to a pivot hinge where the door rotates on a vertical axis.
Compound of 軸 (axis, pivot) and 吊り (hanging, suspension), literally 'axis hanging'. The exact historical derivation is uncertain, but the term describes a hinge mechanism where the door is suspended on a pivot axis.