A sewing machine that suppresses sewing defects is provided. The sewing machine includes: a sewing needle, held by a needle bar and moving back and forth while holding an upper thread; a shuttle, configured to hold a bobbin around which a lower thread is wound and which is housed in a bobbin case, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle; a feeding mechanism, feeding the to-be-sewn article from the sewing position to a first direction; a needle drive portion, provided separately from a belt drive portion to synchronously move the sewing needle and the presser foot component in the first direction; and a control portion, which controls so that the needle drive portion and the belt drive portion operate independently.

A sewing machine that suppresses sewing defects is provided. The sewing machine includes: a sewing needle, held by a needle bar and moving back and forth while holding an upper thread; a shuttle, configured to hold a bobbin around which a lower thread is wound and which is housed in a bobbin case, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle; a feeding mechanism, feeding the to-be-sewn article from the sewing position to a first direction; a needle drive portion, provided separately from a belt drive portion to synchronously move the sewing needle and the presser foot component in the first direction; and a control portion, which controls so that the needle drive portion and the belt drive portion operate independently.

An anti-puckering apparatus for forming, on a work piece, a line of stitching substantially free from puckering is disclosed. The apparatus includes a removable base which is added to a sewing machine bed surface proximate to a needle and a stitch formation zone. The apparatus also includes a carrier mounted on, and moveable relative to, the base and an endless row of flexible filamentary elements carried by the carrier. The carrier progressively moves subsets of filamentary elements into and out of a stitch formation zone during the formation of a line of stitching. The filamentary elements are presented across a stitch formation zone in advance of an intended line of stitching at an oblique angle relative to a sewing machine bed surface.

An anti-puckering apparatus for forming, on a work piece, a line of stitching substantially free from puckering is disclosed. The apparatus includes a removable base which is added to a sewing machine bed surface proximate to a needle and a stitch formation zone. The apparatus also includes a carrier mounted on, and moveable relative to, the base and an endless row of flexible filamentary elements carried by the carrier. The carrier progressively moves subsets of filamentary elements into and out of a stitch formation zone during the formation of a line of stitching. The filamentary elements are presented across a stitch formation zone in advance of an intended line of stitching at an oblique angle relative to a sewing machine bed surface.

The present invention provides a sewing machine that can actuary detect a physical amount of a movement of a fabric without depending on an estimated value. Thus, thread tension can be precisely adjusted. A sewing machine 1 includes a spherical body 22a exposed partly from a needle plate 2. The spherical body 22a is rotated following a feed of a fabric 100. The rotation of the spherical body 22a is detected by rotary encoders 22c, 22d. A physical amount of the movement of the fabric 100 is calculated based on a detection result of the rotary encoders 22c, 22d. The physical amount of the movement of the fabric 100 is, for example, a moving amount and a moving speed.

The present invention provides a sewing machine that can actuary detect a physical amount of a movement of a fabric without depending on an estimated value. Thus, thread tension can be precisely adjusted. A sewing machine 1 includes a spherical body 22a exposed partly from a needle plate 2. The spherical body 22a is rotated following a feed of a fabric 100. The rotation of the spherical body 22a is detected by rotary encoders 22c, 22d. A physical amount of the movement of the fabric 100 is calculated based on a detection result of the rotary encoders 22c, 22d. The physical amount of the movement of the fabric 100 is, for example, a moving amount and a moving speed.

An anti-puckering apparatus for forming, on a work piece, a line of stitching substantially free from puckering is disclosed. The apparatus includes a removable base which is added to a sewing machine bed surface proximate to a needle and a stitch formation zone. The apparatus also includes a carrier mounted on, and moveable relative to, the base and an endless row of flexible filamentary elements carried by the carrier. The carrier progressively moves subsets of filamentary elements into and out of a stitch formation zone during the formation of a line of stitching. The filamentary elements are presented across a stitch formation zone in advance of an intended line of stitching at an oblique angle relative to a sewing machine bed surface.

The present invention provides a sewing machine that can actuary detect a physical amount of a movement of a fabric without depending on an estimated value. Thus, thread tension can be precisely adjusted. A sewing machine 1 includes a spherical body 22a exposed partly from a needle plate 2. The spherical body 22a is rotated following a feed of a fabric 100. The rotation of the spherical body 22a is detected by rotary encoders 22c, 22d. A physical amount of the movement of the fabric 100 is calculated based on a detection result of the rotary encoders 22c, 22d. The physical amount of the movement of the fabric 100 is, for example, a moving amount and a moving speed.

A sewing machine that suppresses sewing defects is provided. The sewing machine includes: a sewing needing, held by a needle bar and moving back and forth while holding an upper thread: a shuttle, configured to hold a bobbin which is housed in a bobbin case and around which a lower thread is wound, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle: a pressure adjustment portion, adjusting pressure applied to the to-be-sewn article by the presser foot member; a feeding mechanism, where endless feeding belts for feeding the to-be-sewn article from the sewing position to a first direction are disposed on two sides of a second direction orthogonal to a first direction with respect to the sewing position, the feeding mechanism is provided with a belt drive portion, and the belt drive portion independently drives the feeding belts on one side of the second direction with respect to the sewing position and the feeding belts on another side of the second direction with respect to the sewing position; and a control portion, configured to control the pressure adjustment portion to make a pressure of the presser foot member be corresponding to a difference between a feeding amount of the feeding belts on one side of the second direction with respect to the sewing position and a feeding amount of the feeding belts on another side of the second direction with respect to the sewing position.

A sewing machine that suppresses sewing defects is provided. The sewing machine includes: a sewing needing, held by a needle bar and moving back and forth while holding an upper thread: a shuttle, configured to hold a bobbin which is housed in a bobbin case and around which a lower thread is wound, and cooperating with the sewing needle to form a seam; a presser foot member, configured to press a to-be-sewn article at a sewing position directly below the sewing needle: a pressure adjustment portion, adjusting pressure applied to the to-be-sewn article by the presser foot member; a feeding mechanism, where endless feeding belts for feeding the to-be-sewn article from the sewing position to a first direction are disposed on two sides of a second direction orthogonal to a first direction with respect to the sewing position, the feeding mechanism is provided with a belt drive portion, and the belt drive portion independently drives the feeding belts on one side of the second direction with respect to the sewing position and the feeding belts on another side of the second direction with respect to the sewing position; and a control portion, configured to control the pressure adjustment portion to make a pressure of the presser foot member be corresponding to a difference between a feeding amount of the feeding belts on one side of the second direction with respect to the sewing position and a feeding amount of the feeding belts on another side of the second direction with respect to the sewing position.