| 摘要 |
PROBLEM TO BE SOLVED: To loosen a clamping instrument 37 and separate an auxiliary bar from a beam in compliance with kinds of use by relatively engaging respective shaft bars 31 through a pair of interlocking links 34, 35, actuating a pair of opening hooks in the separating direction at all times by the elasticity of a spring, fixing attachments 38 on the interlocking links and providing a belt stopper 58 operating the interlocking links on the beam side. SOLUTION: A beam is protruded in the rotor peripheral edge direction from a forward and backward rotating shaft 21 set concentrically with a rotor 13, and a pair of opening hooks 32 provided on the end of the beam are moved forward and backward on a moving area of a clamp 14, and a mouth of a packaging bag 20 is spread for a material to be packaged by separating the moving opening hooks. A pair of opening hooks are supported on a new auxiliary bar 30 through respective rotatable shaft bars 31, and the auxiliary bar is connected to be removable from the release end of the beam and fixable thereon by a clamping instrument 37. |
