| 摘要 |
PROBLEM TO BE SOLVED: To make belt support frames 24, 28 displaceable forward and rear ward in a synchronous manner with the movement of a seal bar in a box motion in a bag-making filling and packaging machine. SOLUTION: A pair of leg frames are erected from right and left symmetric screw grooves of handle shafts 31, 39 which are rotatably stretched between both frames 30 via a female screw, frames 24 having a side belt 27 are slidably supported by the leg frames via a linear rail, and a through rod 50 provided on the seal bar 15 is engaged with a longitudinal slit of the frames 24. The box motion of the seal bar 15 is transmitted to the frames 24 via the through bar 50, and the seal bar is reciprocated along the linear rail of the leg frames. When the relative width of the leg frames is changed by operating the handle shaft 31, the space of the side belt frames 24 is also changed. This mechanism is also used for a rear frame 28. |
