COVER PLATE FOR COVERING THE OUTER PERIPHERY OF A WIRE REEL

摘要

A cover plate for covering the outer periphery of a wire reel comprising an elongate metal plate including on its inner surface a plurality of reinforcing grooves extending continuously across the metal plate and separated in the lengthwise direction of the metal plate, said groove being dimensioned to have a depth sufficient to be deformed into two symmetrically inwards re-entrant bent portions when subjected at the intermediate of the opposite side walls of the groove to an external force produced when the bottom portion of the groove is depressed and in which the re-entrant bent portions are deformed into a flat laminated surface by further depression at opposite side edges of the groove. A method of manufacturing said cover plate, comprising the steps of forming said grooves, depressing the bottom portion of said grooves to form said two symmetrically inwards re-entrant bent portions, and further depressing said re-entrant bent portions into said flat liminated surface. A cover plate manufacturing apparatus comprising a press bed, a pair of restrictable members and a plunger member.