Abstract: A closure plate for detachable attachment to the opening formed in a floor panel is provided. The closure plate includes a flexible, integral locking pawl provided with a protrusion at a desired position thereof. The resiliently deformable locking pawl can be formed integrally with the closure plate, and can have an enlarged portion at the free end of the pawl, and the plate can have a manipulation bore with a recessed surface in the inner periphery thereof for receiving the free end of the pawl. The closure plate includes at least in the upper surface thereof a guide portion defining a wiring port.

Abstract: A device for fixing floor panels mounted on a surface of a base floor by means of support legs which permit vertical adjustment of the floor panels is provided. The fixing device comprises a retainer plate fixed to the base floor for receiving the support legs therein; a support member extending vertically from the retainer plate and having an internally threaded portion; a panel holder; and a bearing member for the panel holder. The bearing member includes one end thereof threaded into the internally threaded portion of the support member for rotatable movement of the bearing member relative to the retainer plate. The bearing member is adapted to be accessible through the floor panels for operation thereof. The panel holder is adapted to be engageable with the bearing member in order to fix the floor panels.

Abstract: The present invention is a device for supporting floor panels in which when the floor panels are clamped by a single-operation type panel retainer, a retaining member of a vertically swingable panel retainer support on a stud bolt is urged downwardly by the resilient force of a compression spring washer interposed between the upper surface of the retainer member and the lower surface of the head portion of the stud bolt for tightly securing the floor panels to the panel pedestal.The present invention further provides a structure for supporting floor panels in which a supporting post is swingably raised on the pedestal base plate, side walls of corners of the floor panels placed on the panel pedestal being matchingly engaged with a guide wall of the panel pedestal support and mating projections of said panel pedestal being closely fitted into mating holes formed by embedding resin holders in said floor panels, whereby the floor panels are tightly secured by a panel retainer to the panel pedester.