SHUTTER MECHANISM FOR HOPPER FEEDING PATH

PROBLEM TO BE SOLVED: To provide a shutter mechanism for a hopper feeding path in which a sliding part is eliminated, and a material can be prevented from being mixed caused by inferiority of action and falling off of a foreign matter and hermeticity is high when the feeding path is closed by means of a shutter body and the whole constitution is simplified. SOLUTION: In the shutter mechanism 20 for opening and closing the hopper feeding path 10 for feeding a granulated material or a powder material, a shutter seat 3 through which the granulated material or the powder material passes, a shutter body 4 having a tapered contact face for closing the hopper feeding path 10 under a condition where it is brought into contact with the opening part of this shutter seat, and an air cylinder 5 for driving this shutter body 4 to bring it into contact with and to separate from the shutter seat 3, are concentrically arranged at a part of the hopper feeding path 10 and hermeticity while the feeding path is closed by bringing a tapered contact face of the shutter body 4 into contact with the opening part of the shutter seat 3 is made higher. COPYRIGHT: (C)2003,JPO