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2. 发明公开

EP1083255A1 Apparatus for detecting thread breakage in sewing machine 有权
标题翻译： VERrichtung zur Fadenbruchfeststellung在einerNähmaschine
公开(公告)号：EP1083255A1
公开(公告)日：2001-03-14
申请号：EP00113633.2
申请日：2000-06-28
申请人： PEGASUS SEWING MACHINE MFG. CO., LTD.
发明人： Kawahito, Toshio, c/o Pegasus Sewing Machine Mfg. , Kaneda, Tatsuaki, c/o Pegasus Sewing Machine Mfg. , Iuchi, Hiroyuki, c/o Pegasus Sewing Machine Mfg.
IPC分类号： D05B51/00 , D05B69/36 , D05B57/02
CPC分类号： D05B51/00 , D05B57/02 , D05B69/36
摘要： The invention relates to an apparatus for detecting thread breakage in a sewing machine. The sewing machine comprises a looper (3) reciprocating laterally across a leading end of a needle, a thread-controlling cam (11) fixed on a rotary shaft (S) interlocked with the reciprocal motion of the looper and varying in the extent of projection from the thread take-up stand (10) along with rotation of the shaft, and thread guides (12) disposed on the thread take-up stand at both sides of the thread-controlling cam. Said thread guides have thread eyelets (12a) for inserting the looper thread (6). Other thread guides having thread pass eyelets (15a) for inserting the looper thread are fixed and disposed on the looper thread route between the thread-controlling cam and the looper. A thread breakage-detecting member (13) detects presence or absence of vibration of looper thread inserted in the thread pass eyelets of other thread guides between the other thread guides. A control circuit stops the sewing machine from driving on the basis of the detection of absence of thread vibration by this thread breakage-detecting member. In this constitution, breakage of looper thread while the sewing machine is being driven is securely detected, and the sewing machine is stopped immediately when the looper thread is broken, so that lowering of the sewing operation efficiency is effectively prevented.
摘要翻译：本发明涉及一种用于检测缝纫机断线的装置。该缝纫机包括横向穿过针头前端的弯针（3），固定在旋转轴（S）上的螺纹控制凸轮（11），该旋转轴（S）与弯针的往复运动互锁并且在突出程度上变化从卷取架（10）与轴的旋转以及设置在卷线架上的导纱器（12）在螺纹控制凸轮的两侧。所述螺纹导向件具有用于插入弯针线（6）的螺纹孔眼（12a）。具有用于插入弯针线的螺纹孔眼（15a）的其它螺纹导纱器固定并设置在线控制凸轮和弯针之间的弯针线路上。线断线检测构件（13）检测插入在其它导线器之间的其它导线器的螺纹孔眼中的弯针线的振动的存在或不存在。基于该线断线检测部件检测到不存在螺纹振动，控制电路使缝纫机停止行驶。在这种结构中，可以可靠地检测缝纫机被驱动时的弯针线的破损，并且当弯针线断裂时缝纫机立即停止，从而有效地防止缝纫操作效率的降低。

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