A trim cover includes: a plurality of skin materials; and a sewing part formed by sewing two skin materials of the plurality of skin materials with multiple rows of seams which extend in parallel with a sewing line of the two skin materials. In the trim cover formed by sewing the plurality of skin materials, the inclining direction of the seam allowances of the two sewn skin materials can be easily made constant so as to suppress the meandering of the sewing line of the two skin materials, and the appearance quality of the vehicle seat covered with the trim cover can be improved.

A trim cover includes: a plurality of skin materials; and a sewing part formed by sewing two skin materials of the plurality of skin materials with multiple rows of seams which extend in parallel with a sewing line of the two skin materials. In the trim cover formed by sewing the plurality of skin materials, the inclining direction of the seam allowances of the two sewn skin materials can be easily made constant so as to suppress the meandering of the sewing line of the two skin materials, and the appearance quality of the vehicle seat covered with the trim cover can be improved.

An overlock sewing machine includes: a looper cover detection member movable from non-switching to switching positions with looper cover open to closed state transition, with switching member operation switching the threading mechanism state to sewing-enabled after looper cover detection member movement to switching position; a side cover detection member movable from non-detection to detection positions with side cover open to closed state transition; and a lever coupled to the looper cover detection member and side cover detection member, switchable between states of pressing and not pressing the operating protrusion, following looper cover detection member and side cover detection member operating states. The lever is set to the pressing state upon movement of the looper cover detection member to switching position and of the side cover detection member to detection position.

An overlock sewing machine includes: a looper cover detection member movable from non-switching to switching positions with looper cover open to closed state transition, with switching member operation switching the threading mechanism state to sewing-enabled after looper cover detection member movement to switching position; a side cover detection member movable from non-detection to detection positions with side cover open to closed state transition; and a lever coupled to the looper cover detection member and side cover detection member, switchable between states of pressing and not pressing the operating protrusion, following looper cover detection member and side cover detection member operating states. The lever is set to the pressing state upon movement of the looper cover detection member to switching position and of the side cover detection member to detection position.

A trim cover includes: a plurality of skin materials; and a sewing part formed by sewing two skin materials of the plurality of skin materials with multiple rows of seams which extend in parallel with a sewing line of the two skin materials. In the trim cover formed by sewing the plurality of skin materials, the inclining direction of the seam allowances of the two sewn skin materials can be easily made constant so as to suppress the meandering of the sewing line of the two skin materials, and the appearance quality of the vehicle seat covered with the trim cover can be improved.

A trim cover includes: a plurality of skin materials; and a sewing part formed by sewing two skin materials of the plurality of skin materials with multiple rows of seams which extend in parallel with a sewing line of the two skin materials. In the trim cover formed by sewing the plurality of skin materials, the inclining direction of the seam allowances of the two sewn skin materials can be easily made constant so as to suppress the meandering of the sewing line of the two skin materials, and the appearance quality of the vehicle seat covered with the trim cover can be improved.

The invention provides a seam structure for fabric and a sewing method which are aesthetically superior and by which pieces of fabric can be sewn together smoothly, without a sewn-on portion protruding at the reverse surface of a garment that comes in contact with the skin, and without fabric edges being exposed at the front surface of the garment. On the upper face of one piece of fabric 2, there extends, along an edge 2a of the fabric, a stitch 5 that is formed as a result of a part of a needle thread 6 passing through the fabric to reach a lower face thereof through stitch holes 4 that are provided at regular intervals; on an upper face of another piece of fabric 3, there are arrayed, along an edge 3a of the fabric, a plurality of rings 7 that are formed as a result of protrusion of an annular leading end of the needle thread 6 having passed through the stitch holes 4 of the one piece of fabric 2 and through the lower faces of the two pieces of fabric; and a first looper thread 8, which runs in a zigzagging manner on the fabric upper faces towards the other piece of fabric 3 so as to entwine two needle threads that pass through the stitch holes 4 of the one piece of fabric 2, and the rings 7 that protrude beyond the other piece of fabric 3, are linked by a second looper thread 9, to yield a seam structure for fabric in which the two pieces of fabric are joined in a state where respective edges thereof are connected to each other.

The invention provides a seam structure for fabric and a sewing method which are aesthetically superior and by which pieces of fabric can be sewn together smoothly, without a sewn-on portion protruding at the reverse surface of a garment that comes in contact with the skin, and without fabric edges being exposed at the front surface of the garment. On the upper face of one piece of fabric 2, there extends, along an edge 2a of the fabric, a stitch 5 that is formed as a result of a part of a needle thread 6 passing through the fabric to reach a lower face thereof through stitch holes 4 that are provided at regular intervals; on an upper face of another piece of fabric 3, there are arrayed, along an edge 3a of the fabric, a plurality of rings 7 that are formed as a result of protrusion of an annular leading end of the needle thread 6 having passed through the stitch holes 4 of the one piece of fabric 2 and through the lower faces of the two pieces of fabric; and a first looper thread 8, which runs in a zigzagging manner on the fabric upper faces towards the other piece of fabric 3 so as to entwine two needle threads that pass through the stitch holes 4 of the one piece of fabric 2, and the rings 7 that protrude beyond the other piece of fabric 3, are linked by a second looper thread 9, to yield a seam structure for fabric in which the two pieces of fabric are joined in a state where respective edges thereof are connected to each other.