Patent ID: 8919715

Claim:
A foldable shelf holder, comprising: a wall side member mountable on a wall and a shelf side member mountable on a shelf plate, the foldable shelf holder changing from a folded state where the shelf side member is folded relative to the wall side member to a used state where the shelf side member is approximately orthogonal to the wall side member, wherein the wall side member has a pin as an axis of rotation of the shelf side member relative to the wall side member and a rotation limiter for limiting rotation of the shelf side member relative to the wall side member, the shelf side member has a long groove which extends in a direction where the shelf side member extends for insertion of the pin of the wall side member, when the shelf side member is slid toward the wall side member in a direction where the long groove extends so that the pin moves in one end of the long groove, a distance from the pin as an axis of rotation of the shelf side member to an abutting portion of the shelf side member behind the pin increases and the abutting portion of the shelf side member behind the pin comes into contact with the rotation limiter of the wall side member so as to prevent rotation of the shelf side member relative to the wall side member and the shelf side member becomes unable to be folded relative to the wall side member, when the shelf side member is slid in a direction away from the wall side member so that the pin moves in another end of the long groove, the distance from the pin as an axis of rotation of the shelf side member to the abutting portion of the shelf side member behind the pin decreases and the shelf side member becomes able to rotate relative to the wall side member and thereby to be folded relative to the wall side member, the wall side member has a web and a pair of side wall parts, the side wall parts standing at opposing width sides of the web and facing each other, and a cross section of the web and the pair of side wall parts defines a U shape, the wall side member has a pair of upper wall parts, each of the upper wall parts respectively located at a longitudinal end of a corresponding one of the side wall parts, each upper wall part being connected to the corresponding one side wall part via a bend in the corresponding one side wall part and being located inwardly or outwardly of the corresponding one side wall part, and the pair of upper wall parts functions as the rotation limiter.