Patent Number: 043938990
Section: claims

1. Apparatus for plugging a plurality of cylindrical holes provided through an inner peripheral wall of a cylindrical container, said apparatus comprising a plurality of plugs to be inserted into said plurality of holes for plugging the same, a supporting ring assembly having an outer diameter smaller than an inner diameter of said container, a beam assembly detachably connected to said ring assembly, means provided on said beam assembly for supporting said plurality of plugs and simultaneously forcing said plugs radially outwardly into said cylindrical holes of said cylindrical container, and means for preventing said plugs from being driven radially inwardly out of said cylindrical holes. 2. Apparatus as set forth in claim 1 wherein said supporting ring assembly is divided into circumferential pieces. 3. Apparatus as set forth in claim 1 which further comprises means for accurately positioning said supporting ring assembly so as to align said plugs supported by said supporting means with said cylindrical holes. 4. Apparatus as set forth in claim 3 wherein said positioning means comprises a plurality of brackets secured on the inner peripheral wall of the container in a circumferentially spaced apart relation, and a corresponding number of supporting pieces secured on the radially outer surface of said ring assembly so that said pieces are engageable with said brackets when said ring assembly is positioned correctly. 5. Apparatus as set forth in claim 1 wherein said means for supporting and forcing said plugs into said holes comprises carriages which are simultaneously driven radially outwardly along said beam assembly by a hydraulic device. 6. Apparatus as set forth in claim 1 wherein said means for preventing said plugs from being driven out of said cylindrical holes comprises means for bringing said ring assembly to a position where a rod projectable from said ring assembly is aligned with each said plug, and a hydraulic device for driving said rod radially outwardly into a tight contact with said plug.