摘要:
Bei stich-, schlaufen- und/oder maschenbildenden Textilmaschinen sind zum Nachziehen der Faden, zum Feigeben während der Stichbildung und zum Anzug nach der Stichbildung ein oder mehrere, hin- und herbewegbare Fadenleiter vorgesehen. Beim Nachziehen der Fäden (2) werden sowohl die herzustellende bzw. zu bearbeitende Textilbahn (7) als auch die Fäden (2) selbst stark belastet Das Nachziehen der Fäden und ebenso ein gleichmäßiger Anzug ist dadurch einwandfrei steuerbar, daß eine Fadenwalze (1) bzw. -rolle vorgesehen ist, die in Abhängigkeit von einer Lochkartensteuerung oder der Bewegung der stich-, schlaufen- und/oder maschenbildenden Werkzeuge nach beiden Drehrichtungen hin angetrieben ist.
摘要:
A thread routing mechanism for needle-switchable type sewing machine is installed on a needle bar switching mechanism of the sewing machine, and includes a thread take-up lever, a cylindrical needle bar case and a plurality of threads. The thread take-up lever includes a sway control end and a thread take-up end having thread holes. The cylindrical needle bar case has a rotation axis and a plurality of spaced needle bar holes, and internally defines a hollow space. The needle bar holes are equally distant from the rotation axis, and each receives a needle bar therein. The needle bars respectively carry a needle having an eye formed thereon. The threads are separately routed through a thread course defined by the thread holes, the hollow space and the needle eyes, such that the length of the threads in the thread course maintains same without being affected by a needle bar switching operation.
摘要:
A sewing machine having a reciprocatory needle (9) and a reciprocatory thread-take-up device (17) to deliver thread to the needle employs a thread control device (16) located between the thread take-up device (17) and the needle (9) to engage and apply light tension to the thread. The thread control device can have two opposed plates (24,25) between which the thread runs and which cooperate to apply spring pressure to the thread, for example, a guide plate (25) and a spring plate (24). The guide plate (25) or other device can include catcher structure (37) to catch thread escaping the take-up device (17). The thread control device (17) can help control premature descent of the thread and improperly tensioned stitches.
摘要:
A device for disabling and enabling one or more needles in a quilting machine, a multi-needle embroidery machine, or the like, is described. The device comprises a linear actuator (24) adapted to carry a needle (22) and to keep the latter, for a predetermined time, in a raised position relative to fabric (10) to be sewn. The device includes as well stitching yarn (44) return means (38) being actuated when needle (22) is disabled, in order to subject to a limited tension the portion of stitching yarn located between the disabled needle and the fabric to be sewn, to prevent the yarn from becoming tangled and from breaking. Furthermore, during the entire operating stage as mentioned above, the known yarn tensioning device (48) through which the stitching yarn is led before arriving to the needle, is disabled.
摘要:
A thread routing mechanism for sewing machine includes a cylindrical needle bar case having a rotation axis and holding multiple spaced needle bars that are equally distant from the rotation axis and respectively carry a needle having an eye; a locating disk moving synchronously with the needle bar case and having multiple thread guide holes spaced around the rotation axis; and a thread take-up lever having a thread take-up end with multiple thread holes and movable upward and downward in a space directly above the needle bar case. Each thread hole together with a corresponding thread guide hole and a corresponding eye define a thread course, such that threads respectively routed through the thread courses have the same length even when the needle bars are changed from one to another. A thread pinching unit is also included to pinch or release the threads in or from the thread guide holes.