Abstract: An assembling device for releasably fixedly securing first and second plate-like members together includes a main case mounted on the first member and having an opening for receiving therein a hook member fixed to and projecting from the second plate-like member. A rotary body is rotatably disposed in the main case and includes structure defining a cylindrical inner surface which faces and is eccentric with a rotary shaft, the cylindrical inner surface being engageable with the hook member. A retaining mechanism is provided which yieldably retains the rotary body rotationally fast with the main case at a predetermined rotational position. Rotation of the rotary body causes relative reciprocal motion between the hook member and the main case such that the hook member reaches a desired position relative to the main case, whereby the first and second members are releasably fixedly secured to each other.

Abstract: A device for assembling furniture or the like includes a main case adapted to be mounted on a base panel, a cam rotatably disposed within the main case, and a retaining member. The cam is disposed for eccentric rotation relative to a rotary shaft. The retaining member includes at one end a retaining portion adapted to press a work panel against the base panel, and at the other end an engaging portion for slidably engaging a cylindrical outer surface of the cam. Rotation of the cam causes reciprocal movement of the retaining member, allowing the retaining portion to engage and disengage the work panel for respectively pressing it against the base panel.

Abstract: An instrument for assembling two board-shaped bodies, including an engagement tool adapted to be driven into an opening in one board-shaped body, and a fixing tool adapted to be driven into an opening in the other board-shaped body. The engagement tool includes an annular engagement member having a radially outwardly projecting engagement portion provided with an engagement pawl adjacent the tip thereof, and a rotary cam or eccentric which is rotatably positioned within the annular member to effect radial displacement of the pawl. The engagement tool also includes an annular housing which accommodates therein the annular engagement member, the housing having stops for controlling the rotation of the cam to a predetermined angle, and having an outer peripheral structure which permits it to fixingly engage the one board-shaped body. The fixing tool has an insertion hole into which the engagement portion is inserted, and an engagement pin engaged by the pawl to lock the tools together.