Patent ID: 6863324
Filing Date: 2005-03-08
Classification: B65D

Abstract:
1. A bottom opening type container comprising: a side plate and a pair of bottom plates; opening and closing shafts of the bottom plates mounted in the vicinity of a bottom portion of the side plate; engaging pins provided in the vicinity of tip ends of the bottom plates; a pair of opening and closing arms which are pivoted to opening and closing fulcrums fixed to the side plate and can retain the engaging pins at lower end portions; intermediate links having one end coupled to an upper portion of the opening and closing arms; a block connected to other ends of the intermediate links; a lifting rod screw-coupled to the block; a sleeve into which is inserted the lifting rod a rocker arm mounted in the vicinity of a lower end of the sleeve and ascends and descends together with the sleeve; a lifting-up arm coupled to the lifting rod via a pin; a manual lever inserted between the lifting-up arm and an upper end of the sleeve to be rotatable by 180° in a horizontal direction using the lifting rod as a rotation shaft; and a stopper provided at a lower portion of the manual lever to prevent the manual lever from lowering, wherein both end portions of the rocker arm are engaged with upper end portions of the opening and closing arms, the lifting-up arm has one short arm and one L-shaped arm on both sides about the pin serving as a rotation center, a pushing-down pin is provided near to the rotation center of the short arm and a lifting hole is provided at a tip end of the L-shaped arm, and S-shaped slits which are fitted to the rocker arm in left and right directions at respective positions of opening and closing are provided in the opening and closing arms.