Patent ID: 7150363

Claim:
A base structure of a retainer for a shelving shelf board, an arm-like hanger or a hook display fitting of a shelf for displaying commodities on a wall surface, comprising: an operation section supporter which has plural locking sections formed at prescribed intervals on flat surfaces of a flat and vertically long board-like material; a shelf board supporting member which has an engagement recess for slidable engagement with the operation section supporter formed and is provided with an engagement boss having a support arm projected from its front and a guide boss which is extended downward from the engagement boss; and at least one pair of movable locking pieces with an elastic body, which is disposed within the engagement boss and having a male arc sliding surface on a side part of a top end, mutually engaged with and slid on a female arc sliding surface formed on an engagement boss side opposite to the male are sliding surface to perform an opening or closing operation by the elastic force of the elastic body, and having the bottom end projected into the locking section of the operation section supporter; a pair of movable locking pieces which are disposed within the engagement boss and opened or closed by the elastic force of elastic bodies with the top ends as the center of turning and to have the bottom ends projected into the engagement recess, wherein the shelf board supporting member is slidable in the vertical direction in engagement with the operation section supporter, and the movable locking pieces are detachable to the locking sections of the operation section supporter.