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    • 82. 发明授权
    • Needle thread restraining device in a thread cutting sewing machine
    • 线切割缝纫机中的针线限制装置
    • US5868089A
    • 1999-02-09
    • US958973
    • 1992-10-09
    • Yuichi InamiMinemasa Nagashima
    • Yuichi InamiMinemasa Nagashima
    • D05B47/00D05B65/00
    • D05B65/00D05B47/00
    • A needle thread restraining device in a thread cutting sewing machine comprising a needle thread restraining device 18 which is disposed on a needle thread path between a needle take-up mechanism (5) and a needle thread supplying source (6) for setting the tension of the needle thread 4 to substantially zero when the thread cutting mechanism (9) does not operate and to a given value when the thread cutting mechanism (9) operates, and a tension nullification means 31 for setting the tension applied by a tension regulator (10) to a given value when the thread cutting mechanism (9) does not operate and for nullifying the tension applied by the tension regulator when the thread cutting mechanism operates. The amount of the needle thread to be drawn under the work can be set properly and independently, nullifying of the tension set by the tension discs when the sewing thread is cut by the thread cutting mechanism. Accordingly, the needle thread restraining device in a thread cutting sewing machine of the present invention has an effect that the needle thread, which remains at the needle side and the work side after the completion of cutting of the sewing thread, can be set to have the necessary and sufficient length with ease and accuracy irrespective of the kind of works, the state of seams and the kind of needle thread.
    • 一种切线缝纫机中的线螺纹限制装置,其特征在于,包括设置在针取出机构(5)和针线供给源(6)之间的针线路径上的针线限制装置18, 当线切割机构(9)不工作时,针线4基本上为零,并且当切线机构(9)工作时,该线螺纹4基本上为零;以及用于设定由张力调节器(10)施加的张力的拉伸无效装置31 )切割机构(9)不工作时的给定值,并且在切线机构动作时使由张力调节器施加的张力无效。 在工作时要拉伸的针线的量可以适当且独立地设定,当缝纫线被切线机构切断时,由于张紧盘设定的张力无效。 因此,本发明的切线缝纫机中的线卷限制装置具有如下效果,即,能够将缝纫线的切断结束后的针侧和工作侧残留的针线设定为具有 无论工件的种类,接缝的状态和针线的种类如何,都需要和足够的长度。
    • 90. 发明授权
    • Sewing machine take-up thread shield
    • 缝纫机卷取螺纹屏蔽
    • US4030431A
    • 1977-06-21
    • US688880
    • 1976-05-24
    • Adolph MartinWilliam Joseph Edwards
    • Adolph MartinWilliam Joseph Edwards
    • D05B47/00D05B49/00
    • D05B47/00
    • A thread shield, for a sewing machine having means to interrupt needle bar reciprocation and a take-up with a threading slot to an eyelet thereof, to discourage thread escape from the eyelet or double threading of the eyelet by loose, slung around thread. The sewing machine take-up moves in an up and down path from an uppermost position, where thread may be drawn to the eyelet by way of the threading slot, to a lower position where appreciable slack thread forms when the needle bar reciprocation is interrupted. At the position where appreciable slack thread forms, the take-up moves closely adjacent to an upstanding rib which overlaps the entry to the threading slot thus to deter thread loops from reentering the threading slot. The forward surface of the upstanding rib is tapered in a horizontal plane towards the take-up lever to impede thread, which might otherwise move from the eyelet rearwardly down the threading slot to the threading slot entry. The forward surface of the upstanding rib is also curved in a vertical plane to form a minimum angle of 90.degree. with the projection of the top surface of the take-up lever on the vertical plane, to discourage a loop of thread slung about the take-up from being drawn back during the up stroke of the take-up to a position where it will re-enter the threading slot to double thread or unthread the take-up.
    • 一种用于缝纫机的缝纫机,其具有中断针杆往复运动的装置和带有穿孔的卷绕到其孔眼的装置,以阻止螺纹从孔眼逸出,或者通过松弛的环绕线圈双重穿线。 缝纫机卷取机构从最上方位置向上下方向移动,在最上方的位置,线可以通过穿线槽被拉到孔眼上,当针杆往复运动中断时形成明显的松弛螺纹的下部位置。 在形成明显的松弛螺纹的位置处,卷取物紧紧地靠近与穿入槽的入口重叠的直立肋,从而阻止螺纹环重新进入穿线槽。 直立肋的前表面在水平平面中朝着卷取杆呈锥形,以阻止螺纹,否则螺纹可能会从孔眼向后沿穿线槽移动到穿线槽入口。 直立肋的前表面也在垂直平面上弯曲,以便在垂直平面上使卷绕杆顶表面的突出部形成90°的最小角度,以阻止围绕卷取物的螺旋环 由于在卷取的上行期间被拉回到其将重新进入穿线槽的位置以双线或无螺纹缠绕的位置。