Sewing machine

Patent metadata

Field	Value
Publication number	US-2024175186-A1
Application number	US-202318522155-A
Country	US
Kind code	A1
Filing date	Nov 28, 2023
Priority date	Nov 29, 2022
Publication date	May 30, 2024
Grant date	—

Abstract

A sewing machine includes: a sewing needle; a shuttle, cooperating with the sewing needle to form a seam; a pressing member, pressing a sewing object disposed at a sewing position immediately below the sewing needle; a feed mechanism, in which endless feed belts feeding the sewing object disposed at the sewing position from the sewing position along a first direction are disposed on two sides with respect to the sewing position in a second direction orthogonal to the first direction, and in which a belt drive part is provided; a needle drive part, provided separately from the belt drive part, and moving the sewing needle in the first direction; and a control part, exerting control so that the belt drive part and the needle drive part operate independently.

First claim

What is claimed is:

1 . A sewing machine, comprising:
a sewing needle, held by a needle bar and holding an upper thread to move reciprocally; a shuttle, holding a bobbin which is accommodated in a bobbin case and in which a lower thread is wound, and cooperating with the sewing needle to form a seam; a pressing member, pressing a sewing object disposed at a sewing position immediately below the sewing needle; a feed mechanism, in which endless feed belts feeding the sewing object disposed at the sewing position from the sewing position along a first direction are disposed on two sides with respect to the sewing position in a second direction orthogonal to the first direction, and in which a belt drive part is provided; a needle drive part, provided separately from the belt drive part, and moving the sewing needle in the first direction; and a control part, exerting control so that the belt drive part and the needle drive part operate independently.

2 . The sewing machine as claimed in claim 1 ,
wherein the control part performs, as a mode of feeding the sewing object, a belt feed mode that controls the needle drive part and the belt drive part, so that the sewing needle and the feed belts do not move in the first direction during a period in which the sewing needle is stuck to the sewing object, and the sewing needle does not move in the first direction and the feed belts move in the first direction during a period in which the sewing needle is withdrawn from the sewing object.

3 . The sewing machine as claimed in claim 1 ,
wherein the control part performs, as a mode of feeding the sewing object, a needle feed mode that controls the needle drive part and the belt drive part, so that the sewing needle and the feed belts move synchronously by a predetermined distance in the first direction during a period in which the sewing needle is stuck to the sewing object, and the sewing needle and the feed belts do not move in the first direction during a period in which the sewing needle is withdrawn from the sewing object.

4 . The sewing machine as claimed in claim 1 ,
wherein the control part is able to switch between a belt feed mode and a needle feed mode, the belt feed mode controls the needle drive part and the belt drive part, so that the sewing needle and the feed belts do not move in the first direction during a period in which the sewing needle is stuck to the sewing object, and the sewing needle does not move in the first direction and the feed belts move in the first direction during a period in which the sewing needle is withdrawn from the sewing object, and the needle feed mode controls the needle drive part and the belt drive part, so that the sewing needle and the feed belts move synchronously by a predetermined distance in the first direction during the period in which the sewing needle is stuck to the sewing object, and the sewing needle and the feed belts do not move in the first direction during the period in which the sewing needle is withdrawn from the sewing object.

Assignees

• Juki Kk

Inventors

• Ogawa Tatsuya
• Higa Takahiro
• Sato Kuniaki
• Nakayama Hajime
• Zhang Juan

Classifications

• D05B19/16

  Control of workpiece movement, e.g. modulation of travel of feed dog · CPC title

• D05B19/14

  Control of needle movement, e.g. varying amplitude or period of needle movement · CPC title

• D05B19/02 Primary

  Sewing machines having electronic memory or microprocessor control unit · CPC title

• D05B69/12 Primary

  using rotary electric motors · CPC title

• D05B1/12

  Lock-stitch seams · CPC title