Rolled hem switching device for overlock machine
    3.
    发明授权
    Rolled hem switching device for overlock machine 失效
    卷帘机用卷边切换装置

    公开(公告)号:US5529003A

    公开(公告)日:1996-06-25

    申请号:US346649

    申请日:1994-11-30

    CPC分类号: D05B37/04

    摘要: A rolled hem switching device comprises a lower knife mounting base which is arranged below a throat plate and is adjustably movable in a lateral direction by way of a laterally moving mechanism provided on a sewing machine frame, a moving pawl which slidably engages a guide groove extending in a cloth feeding direction on a side surface of the lower knife mounting base, a presser member which is fixed to the lower knife mounting base and slidably supports a side surface of the moving pawl and which comprises a horizontal slit of a given length for projecting a projecting portion of the moving pawl therethrough and a lower knife which is fixed to a side surface of the lower knife mounting base at a front side of the presser member for slidably supporting a side surface of the moving pawl. As a result, it is possible not only to switch between forming overlock stitches and forming rolled hem, but also to adjust the width of the overlock stitches by integrally adjusting the lateral positions of the moving pawl and lower knife without changing a throat plate and it is also possible to stably hold the moving pawl.

    摘要翻译: 卷边切换装置包括下刀安装基座,其布置在喉板下方并且可通过设置在缝纫机框架上的横向移动机构在横向上可调节地移动;移动棘爪,其可滑动地接合延伸的引导槽 在下刀安装基座的侧面上沿着送布方向,压紧构件固定在下刀安装座上并可滑动地支撑移动爪的侧面,并且包括一给定长度的水平狭缝,用于突出 所述移动棘爪的突出部分穿过其中;以及下刀,其在所述按压部件的前侧固定到所述下刀安装基座的侧表面,用于可滑动地支撑所述移动爪的侧表面。 结果,不仅可以在形成包缝线圈和成形卷边之间进行切换,而且可以通过在不改变喉板的情况下整体地调节移动爪和下刀的横向位置来调整外嵌线圈的宽度 也可以稳定地保持移动爪。