crotch while the former half is being sewn and moves towards the sewing mechanism unit 3 applying proper tension to the workpiece 85 in accordance with the sewing operation the hand 5 releases the holding operation when it approaches the sewing mechanism unit 3 and then guides a pair of edges of the front and back bodies extending from the center of the crotch to the bottom of the other leg of the workpiece 85 for trousers hereinafter referred to as latter half to the sewing mechanism unit 3 with overlapping them the hand 5 also includes a sewn edge fold down mechanism unit 33 which will be described later to check the cloth being six layered the third hand 6 holds the bottom of the latter half while the latter half is being sewn moving towards the sewing mechanism unit 3 in accordance with the sewing operation the following is a detailed description of each of the above units as shown in fig7 the sewing mechanism unit 3 comprises a sensor 14 to detect that the cloth to be sewn is set on the needle drop point and another sensor 15 to detect that the second hand 5 has been arrived in addition to essential components to be a sewing machine.