公开(公告)号：US4328759A

公开(公告)日：1982-05-11

申请号：US142155

申请日：1980-04-21

申请人： Svend Astrupgaard ,  Heinz Petri

发明人： Svend Astrupgaard ,  Heinz Petri

IPC分类号： D05B27/22

CPC分类号： D05B27/22

摘要： A sewing machine includes a material engaging part such as a dog which is engageable with a material workpiece to selectively feed it in a forward and a reverse direction. In addition, the sewing machine includes the usual mechanism for raising and lowering the dog so as to complete an advancing or reverse movement of the material. The dog is driven preferably by a mechanism which includes an eccentric which may be adjusted so as to vary the length of horizontal feeding movement of the dog while the elevational changes of the dog remain constant by a separate feeding control mechanism. The magnitude of movement of the dog is controlled in accordance with a stitch length to be sewed by a stitch setting device which includes a movable contacting member which is connected to the eccentric mechanism and is movable between two end positions in order to adjust by a selected amount the movement of the eccentric in driving the dog by a selected amount. The device also includes first and second setting members arranged on respective sides of a contacting member which may, for example, be in the form of a fluid operated piston and a setting member positioning means is connected to the two setting members so as to move them simultaneously in respective opposite directions and position them on respective opposite sides of the contacting member or piston so as to control the end positions of movement of the piston during the operation of the sewing machine. The piston rides in a fluid cylinder and fluid pressure may be applied to respective sides thereof for shifting the position of the piston for the purposes of reversing the direction of feeding movement of the material being sewn.

摘要翻译： 缝纫机包括可与材料工件接合的材料接合部分，例如狗，以选择性地沿正向和相反方向进给。 此外，缝纫机包括用于升高和降低狗的通常机构，以完成材料的前进或后退移动。 狗优选地由包括偏心轮的机构驱动，该偏心器可以被调节以便在犬的高度变化通过单独的进给控制机构保持恒定时改变狗的水平进给运动的长度。 狗的移动量根据由缝纫设定装置缝制的线圈长度来控制，该线圈设置装置包括可移动接触构件，该可动接触构件连接到偏心机构并且可在两个端部位置之间移动，以便通过选定的 量化偏心轮在驾驶狗中的移动量。 该装置还包括布置在接触构件的相应侧上的第一和第二设定构件，其可以例如是流体操作的活塞的形式，并且设定构件定位装置连接到两个设定构件，以便使它们移动 同时在相反的方向上并且将它们定位在接触构件或活塞的相应的相对侧上，以便在缝纫机的操作期间控制活塞的运动的终点位置。 活塞骑在流体缸中，并且可以将流体压力施加到其相应的侧面，以便改变活塞的位置，以便反转正在缝制的材料的进给运动的方向。

公开(公告)号：US4471707A

公开(公告)日：1984-09-18

申请号：US556562

申请日：1983-11-30

申请人： Svend Astrupgaard ,  Ernst K. Krusholt ,  Morgens Poulsen

发明人： Svend Astrupgaard ,  Ernst K. Krusholt ,  Morgens Poulsen

IPC分类号： D05B65/02 ,  D05B57/00 ,  D05B65/00 ,  F15B11/06

CPC分类号： D05B65/00 ,  D05B57/00 ,  D05D2207/02

摘要： A thread catcher of a cutting device in sewing machines is actuated by an air cylinder whose piston has two portions of unequal diameter. The small cylinder space accommodating the smaller-diameter piston portion is permanently pressurized while the larger cylinder space is alternately pressurized and vented. The larger cylinder space portion on its end closer to the smaller piston portion is permanently vented through a conduit. Both this conduit and the conduit for supplying the larger cylinder space include a throttle. The obtained effect is that the first step of motion of the thread catcher is quick and exact in duration, while the second step of motion is slower but performed with a greater force, so that thin threads are prevented from tearing prematurely and thick threads are cut reliably.

摘要翻译： 缝纫机中切割装置的线捕获器由气缸致动，气缸的活塞具有两个不等直径的部分。 容纳较小直径的活塞部分的小气缸空间被永久地加压，同时较大的气缸空间被交替地加压和排气。 靠近较小活塞部分的较大的气缸空间部分通过导管永久地排出。 这个导管和用于提供较大气缸空间的导管都包括节气门。 所获得的效果是，线捕获器的运动的第一步骤是持续的快速和准确的，而第二步运动较慢但是以更大的力执行，使得防止细纱线过早撕裂并且粗线被切割 可靠地