A web joint apparatus 200 is configured to join a pair of webs 61, 62 for absorbent article 1 folded in the cross direction CD with reference to a folding line. The web joint apparatus 200 includes: an ultrasonic horn 211 configured to join the paired waistline portions 10 an anvil 222 facing the ultrasonic horn 211 and configured to pinch the intermediate web 6 between the anvil 222 and the ultrasonic horn 211 and a crotch hold bar 240 configured to hold the intermediate web 6 while stretching the intermediate web 6 in a direction in which the crotch portions 20 get away from the waistline portions, when the intermediate web 6 are joined by the ultrasonic horn 211 and the anvil 222.本發明提供一種,在被對折的纖維網的接合時,可確實防止胯下部在砧輥的法線方向彎折的情況,並且可更確實抑制吸收性物品的製造不良之纖維網接合裝置及纖維網接合方法。解決手段,本發明的纖維網接合裝置(200),是以與機械方向MD平行的彎折線為基準,將吸收性物品(1)用的纖維網(61、62)朝向交叉方向CD折疊的狀態下,接合一對的腰圍部(10)。纖維網接合裝置(200)是具備有:接合一對的腰圍部(10)的超音波振盪頭(211);與超音波振盪頭(211)對向,且在與超音波振盪頭(211)之間夾著中間體纖維網(6)的砧(222);以及藉由超音波振盪頭(211)與砧(222)接合中間體纖維網(6)之際,在沿著胯下部(20)從腰圍部遠離的方向,伸長中間體纖維網(6)的狀態下,保持中間體纖維網(6)的胯下保持桿(240)。200...纖維網接合裝置210...超音波機構500...限制部90...折疊裝置232...下游側輥220...旋轉滾筒231...上游側輥240...胯下保持桿20...胯下部MD...機械方向CD...交叉方向
