Boring device and multi-needle embroidery sewing machine equipped with the same
AssigneeBrother Kogyo Kabushiki Kaisha
InventorTomoyasu Niizeki
Life of this patent
Estimating the term…
Abstract
A boring device that can be attached to and detached from a lower end of one of a plurality of needle bars provided on a multi-needle embroidery sewing machine, and includes a boring knife that makes a cut in a work cloth and a first engagement portion to be engaged with a second engagement portion provided on the one of a plurality of the needle bars. The second engagement portion restricts horizontal rotation of the boring device, and a horizontal position of the boring knife with respect to the one of the needle bars is determined when the first engagement portion is engaged with the second engagement portion.
Claims2
A multi-needle embroidery sewing machine comprising:
- a plurality of needle bars;
- a second engagement portion provided on a predetermined needle bar of the plurality of needle bars;
- and
- a detachable boring device that is attached to a lower end of the predetermined needle bar,
- wherein:
- the boring device comprises a boring knife that makes a cut in a work cloth and a first engagement portion that is engaged with the second engagement portion;
- the second engagement portion restricts horizontal rotation of the boring device;
- a horizontal position of the boring knife with respect to the predetermined needle bar is determined when the first engagement portion is engaged with the second engagement portion;
- the boring device further comprises an attachment portion configured to fix the boring device to the lower end of the predetermined needle bar;
- and
- the multi-needle embroidery sewing machine further comprises an interference member that interferes with the attachment portion when the boring device is attached to the lower end of a needle bar other than the predetermined needle bar, thereby restricting the attachment of the boring device to the needle bar other than the predetermined needle bar.
Dependencies are inferred from the claim text.