| 摘要 |
An internal batch mixer is provided with: a casing within which a material is mixed; a door which opens and closes a material discharge opening of the casing by being rotated about the axis thereof and closes the material discharge opening when in a closed state; and a latch mechanism which, when the material is mixed in the casing, holds the door in a latched state, the latched state being a state in which the material discharge opening is being closed by the door and cannot be opened, and which, when the material having been mixed in the casing is discharged from the inside of the casing, releases the door from the latched state. The latch mechanism is provided with a linear actuator which has a movable section capable of moving linearly and moves the movable section to the door side to supply power to the latch member, the power causing the latch member to move to the door side, and a linear sensor for measuring the distance of linear movement of the movable section caused by the linear actuator. Information relating to the displacement of the latch member is displayed on a display device on the basis of the distance of linear movement of the movable section measured by the linear sensor.
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