HATCH STRUCTURE FOR SNOW THROW-IN PORT OF SNOW DITCH

摘要

PURPOSE: To lightly open or close a hatch board manually by providing an arm with a balance weight rotated together with a balance weight and lifted or lowered interlockingly with the opening/closing of a hatch board at the top section of a snow throw-in port connected to a snow ditch. ;CONSTITUTION: A snow throw-in port frame body 6 welded with four L-shaped frame boards 7 into a rectangular shape on the plan view is provided at the top section of the snow insertion port 5 to a snow ditch 3, a hatch frame body is fitted to a rectangular recess 7b formed inside the snow insertion port frame body 6, and the base section of a rectangular hatch board 15 is fitted to the hatch frame body via a hatch haft 20. The base section of an arm 24 with a balance weight 25 is fitted to the balance weight shaft 23 having the second gear 22 meshed with the first gear 21 on the hatch shaft 20.;COPYRIGHT: (C)1996,JPO