MULTI-PURPOSE SUPPORT DEVICE

A support device includes a movable body provided movably between an advanced position for forming a projection on an object, and a retracted position for forming a recess on the object. The multi-purpose support device includes a casing body movably supporting the movable body, a biasing body exerting a biasing force to the movable body, and a control mechanism for the movable body. The control mechanism performs a cycle of controlling the movable body including: temporal holding of the movable body at a reference position; first pushing of the movable body at the reference position toward a retracted position against the biasing force; causing the biasing force to move the movable body after the first pushing, to an advanced position; second pushing of the movable body at the advanced position against the biasing force; and causing the biasing force to move the movable body to the reference position.