VENTILATING HOLE COVER

摘要

PROBLEM TO BE SOLVED: To provide a ventilating hole cover for achieving higher working efficiency and lower manufacturing cost by integrally forming a cover plate portion and a fist grooved plate portion for receiving rainwater or oil dropping from the cover plate portion while using a less number of members to be provided in parallel to a bottom frame body than that of conventional one to simplify the mounting work. SOLUTION: A plurality of supporting bars 6 are provided in parallel to the bottom frame body 1 which is arranged at the peripheral edge of an almost horizontal ventilating hole 21. Each of the supporting bars 6 is constructed by integrally forming the almost horizontal cover plate portion 14 and the first grooved plate portion 15 bent from a rear edge b of the cover plate portion 14 to the lower and rear side into an approximately L-shape for discharging rainwater or oil flowing therein. A front edge f of each of the cover plate portions 14 is located in each of the grooved plate portions 15 vertically projecting and neighboring each other. COPYRIGHT: (C)2006,JPO&NCIPI