Bobbin changer apparatus for sewing machine

a technology for changing bobbins and sewing machines, applied in sewing apparatuses, loop takers, textiles and paper, etc., can solve the problems of high cost, high labor intensity, and a large amount of time and labor in the manufacture of component parts
US20070056490A1Inactive Publication Date: 2007-03-15TOKAI IND SEWING MACH CO LTD +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
TOKAI IND SEWING MACH CO LTD
Publication Date
2007-03-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

Transfer mechanism (20) is provided for reciprocally transferring a bobbin grasping device (10), grasping a bobbin case (B) at the distal end of a chuck section (11), between a rotary hook (6) of a sewing machine and a bobbin stock section (8). First cam plate (31) is provided adjacent to one end for orienting the chuck section (11) toward the rotary hook (6) during the transfer, while a second cam plate (41) is provided adjacent to the other end for orienting the chuck section (11) toward the bobbin stock section (8) during the transfer. The cam plates (31, 41) are detachable from the transfer mechanism (20), and, in transportation of the machine, one of the cam plates is transported as an attachment to a main sewing table, while the other plate is transported as an attachment to an extension sewing table. The bobbin grasping device (10) includes a moving body section (13), chuck section (11), and a spring member (19) for normally biasing the chuck section toward a predetermined neutral position.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a bobbin changer apparatus for automatically replacing a bobbin case having accommodated therein a lower thread bobbin to be mounted in a rotary hook of a sewing machine. BACKGROUND ART

[0002] Lower thread change devices are arranged to, when a bobbin, contained in a bobbin case mounted in a rotary hook supported on a rotary hook base, has run out of a lower thread, automatically replace the empty bobbin case with a new bobbin case containing a bobbin with a sufficient lower thread wound thereon, and such lower thread change devices have been known as bobbin changers. In Japanese Patent Application Laid-open Publication No. 2000-157774, there is disclosed a multi-head sewing machine equipped with a plurality of machine heads, where a bobbin changer is provided for each of the machine heads (i.e., for each of the rotary hook bases) and drive mechanisms of the individual bobbin changers are drivable via a same or common drive sou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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