Trouser-fly sewing apparatus for mechanically manufacturing a fly to which a slide fastener is sewn diagonally

The apparatus has a fly-conveying passage (16) provided at a conveying section (15) for carrying a fly (F) from a supply section to a sewing section (33) where a slide fastener chain (H) is sewn to the fly. An angle-changing element (19) which has a desired inclination relative to the conveying direction of the fly is disposed on one side of the fly-conveying passage against which a side portion of the fly abuts so that the fly displaced diagonally prior to reaching the sewing section. Preferred Features: The inclination angle of the angle-changing element can be adjusted with respect to the conveying direction of the fly and can ascend or descend so as to abut or retreat from the fly. The supply section is a lateral supply section (2a) which is disposed on one side of the fly-conveying passage, to which it supplies the fly in a lateral direction. The lateral supply section has a number of follower rollers (5) for supplying the fly that are each adjustable to that the side end portion of the fly abuts the angle-changing element. Alternatively the supply section may be a longitudinal supply section on the upstream side of the fly-conveying passage, to which it supplies the fly in a longitudinal direction and which includes a number of driving rollers that each have rotary shafts that are adjustable to that the side end portion of the fly abuts the angle-changing element. The conveying section has a longitudinal conveying belt disposed above the fly-conveying passage which can ascend and descend and which carries the fly to the sewing section while pressing the fly when the conveying belt descends. The conveying belt includes first (17) and second (18) sections, the second of which is positioned between the sewing section and the first section so that a rear portion of the second section on a side towards the first section can ascend and descend and both succeeding and preceding flies can be simultaneously conveyed to the sewing section of the slide fastener chain while being pressed after succeeding fly is caused to abut on the preceding fly. In der Vorrichtung ist ein Querzuführabschnitt (2a) an einer Seite eines Untertrittband-Förderdurchlasses (16) angeordnet, und ein Winkeländerungsteil (19) mit einem gewünschten Neigungswinkel ist auf der anderen Seite des Förderdurchlasses (16) angeordnet. Ein Untertrittband (F) wird von dem Querzuführabschnitt (2a) zugeführt, so daß es an dem Winkeländerungsteil (19) zur Anlage gelangt und bis zu dem gewünschten Neig