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2. 发明申请

WO1990000640A1 OVERCAST SEWING-MACHINE FOR FORMING A MULTITHREAD OVERCAST SEAM 审中-公开
标题翻译：用于形成多重覆盖层的超大型缝纫机
公开(公告)号：WO1990000640A1
公开(公告)日：1990-01-25
申请号：PCT/EP1989000616
申请日：1989-06-01
申请人： PFAFF HAUSHALTMASCHINEN GMBH , HOLL, Helmar , MEIER, Günter
发明人： PFAFF HAUSHALTMASCHINEN GMBH
IPC分类号： D05B57/02
CPC分类号： D05B57/02
摘要： The aim of the present invention is to adapt a traditional sewing machine so that minimal adjustments are required to sew several different types of stitches. Several solutions are suggested for alternatively sewing stitches 512 and 514, comprising two needle threads, i.e. one gripper underthread and one gripper overlock thread. In one of the embodiments of said invention, the carrier (19) of the overlock gripper can be set in a first operational position, where both needle threads are interlinked together with the gripper overlock thread, and moved to a second operational position, where only the needle thread adjacent to the seam of the object being sewn is interlinked together with the gripper overlock thread. In another embodiment of said invention, two thread eyes (29, 30) are provided in the overlock gripper, at a given distance from each other, and the gripper overlock thread is passed through one of the needle eyes to form one of the types of stitches, and through the other needle eye to form the other type of stitch. Stitch type 504, comprising three threads, can be formed by removing one of the needles. To form stitch type 502, comprising a needle thread and a gripper underthread, without a gripper overhead thread, an overhead gripper (41) on the gripper carrier, having a forked catching tip (44), can be moved between a rest position and an operational position, in which the catching tip of the overhead gripper forms an extension of the catching tip fork branch of the overhead gripper furthest from the needle, by which the gripper underthread is carried around the seam of the object being sewn and positioned in front of the needle for insertion. In order to improve the tensile strength of the stitching, additional stitching tools for forming a double chain stitch seam of stitch type 401, DIN 61400, US Federal Standard Catalogue No 751, are added to the stitching tools for forming the corresponding overhead seam.
摘要翻译：本发明的目的是适应传统的缝纫机，以便缝制几种不同类型的针迹需要最少的调整。建议用于替代缝纫针迹512和514的几种解决方案，包括两个针线，即一个夹持器底线和一个夹持器套锁线。在所述发明的其中一个实施例中，外套夹持器的托架（19）可以设置在第一操作位置，其中两个针线与夹持器上锁螺纹相互连接在一起，并移动到第二操作位置，与正在缝制的物体的接缝相邻的针线与夹持器包锁线相互连接。在所述发明的另一个实施例中，两个螺纹眼（29,30）以彼此相距一定距离设置在外套夹持器中，并且夹持器包锁线穿过针眼之一以形成其中一种缝针，并通过其他针眼形成其他类型的针迹。可以通过移除针中的一个来形成包括三个线的缝合类型504。为了形成线圈类型502，包括没有夹具架线的针线和夹持器底线，具有叉形捕捉尖端（44）的夹持器托架上的顶部夹具（41）可以在静止位置和操作位置，其中顶部夹具的捕获尖端形成距离针最远的顶部夹具的捕捉尖叉分支的延伸部，通过该延伸部分，夹持器底线被围绕被缝合的物体的接缝运送并定位在针插入。为了提高缝合线的拉伸强度，用于形成针脚类型401的双链缝合接缝的附加缝合工具（DIN 61400，美国联邦标准目录号751）被添加到缝合工具中以形成对应的架空缝。

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