| 摘要 |
An objective of the present invention is to provide a machine tool which can improve durability of a door and reduce noise when opening and closing the door. The machine tool comprises: a housing having an opening part formed on one side thereof and comprising an upper rail and a lower rail arranged on an upper side and a lower side of the opening part, respectively; a door which slides along the upper rail and the lower rail to open and close the opening part; a lower roller unit which is arranged on an end of a lower side of the door to support the door, and moves along the lower rail; and an upper roller unit which is arranged on an end of an upper side of the door, moves along the upper rail, and has a base mounted on the door, a mounting hole, a shaft mounted in the mounting hole, a bearing arranged on one end of the shaft to be moved along the upper rail, and a balance maintaining unit to maintain balance of the shaft. |
