DISPOSABLE DIAPER PRODUCTION METHOD AND PRODUCTION DEVICE

摘要

Provided are a disposable diaper production method and a disposable diaper production device by which cutting positions of respective side pieces can be accurately managed. A partly-finished product is conveyed in a longitudinal direction in a state in which both side portions in the width direction of the cutting position of respective side panel pieces are held for each set of the two side panel pieces when the respective side panel pieces are cut off by a cutting unit. A controller controls driving rates of a cutting motor and a conveying motor to rotate driving blades at a rate faster than the conveying rate of the partly-finished product.

主权项

1. A disposable diaper production method for producing a disposable diaper having a main body portion that extends from a front belly part to a back part via a crotch part and a pair of side portions that covers side surfaces of a lumbar part of a wearer when the disposable diaper is worn,
the method comprising: a constituents producing step of producing constituents formed of the main body portion and four side pieces each of which protrudes from both ends of the main body portion in a longitudinal direction to both outer sides in a width direction of the main body portion; a folding step of folding the main body portion in the longitudinal direction to form two sets of two mutually-overlapping side pieces; a joining step of joining the mutually-overlapping side pieces to each other for each set of the two side pieces of the folded constituents to form the pair of side portions; a cutting step of rotating and driving a driving shaft to rotate a pair of driving blades about an axial line of the driving shaft and compressing each set of the two side pieces joined to each other between the respective driving blades and a pair of facing blades facing the respective driving blades to cut off end portions of the two side pieces uniformly; and a conveying step of conveying the constituents in the longitudinal direction in a state in which both side portions in the width direction of a cutting position of the respective side pieces are held for each set of the two side pieces when the respective side pieces are cut off in the cutting step, wherein the cutting step rotates the driving blades at a rate faster than a conveying rate of the constituents in the conveying step.