| 摘要 |
PURPOSE: A board roller is provided to prevent a damage by a contact by always securing the distance between a constant pressure bearing and a roll and the reduction of a yield rate. CONSTITUTION: The roller(100) comprises:an upper and lower working rolls(2,3) to roll a board(11); middle rolls(4,5) and support rolls(6,7) to support the working rolls(2,3) at vertical; idle rolls(8,9,10,11) to support the working rolls(4,5) at horizontal; constant pressure bearings(12,13,14,15) to support the body unit of the idle rolls(8 or 11) at horizontal by passing the pressure of a fluid( ex. oil) and by rising in a non-contact state.
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