| 摘要 |
PURPOSE:To prevent that the crushed material insufficiently crushed and comparatively large in size is discharged from the discharge port of a crusher and to prevent the trouble such as clogging in the following line. CONSTITUTION:The freely reciprocatively rotary ripper wheels 6, 7, 8 are provided in a casing 2. When the respective ripper wheels 6, 7, 8 are normally rotated, the discharge port 4 of the casing 2 is closed by a provided damper. When these are reversely rotated, the discharge port 4 is opened thereby. |
