Waterproof structure of combination weighing device

A waterproof structure for a combination weighing apparatus, the combination weighing apparatus, comprising:

• a center base substrate having a plurality of openings;
• a plurality of hoppers;
• and
• a plurality of driver units each having a cabinet, the plurality of hoppers each being attachable to a respective one of the plurality of driver units,
• the cabinets of the plurality of driver units being mountable to the plurality of openings of the center base substrate in a manner that the plurality of openings are closable with the cabinets,
• the plurality of driver units being allowed to open and close the gates of the plurality of hoppers,
• the cabinets of the plurality of driver units each comprising a unit case, and a cover case,
• the unit cases each including a metallic material and having an opening formed correspondingly to a respective one of the openings of the center base substrate,
• the cover cases each including a metallic material and having an opening, the cover cases serving to cover the unit cases,
• the cover cases each comprising a flange that covers the flange of the unit case, with a void being present therebetween, from an outer circumferential side of the flange, the flanges of the cover cases being annularly disposed circumferentially along the openings,
• packing members each being interposed between the flange of the unit case and the flange of the cover case,
• the center base substrate comprising blocking protrusions on an outer circumferential surface thereof, the blocking protrusions each protruding into between the packing member and the flange of the cover case in the void.