摘要:
Disclosed are a chain link, a chain conveyor, a filling machine, and a package-flap folding method. The chain link comprises a hinge part (38) and a support part (39); the support part is fastened with a blade (28) for clamping and pushing a package; the blade divides the support part into a rectangular front support part (37) and a rear support part (36); multiple chain links can be hinged to form an annular chain, and the distance between the blades of two neighboring chain links in a straight line segment equals to the width of the package (L); the length of the support surface of the front support part (L5) equals to or is slightly smaller than the distance between an flap at the end to the rear side surface of the package (L1); the rear end surface of the rear support part forms the guiding surface for guiding the folding of the flap at the end. The package is fed through the provision platform of the annular chain, during the movement through the chain link from a C-shaped part to the linear top branch, the blade of the next chain link pushes the package closer to the blade of the previous chain link, and the rear end surface of the rear support part folds the flap at the end backward onto the end part.