SU39525A1 - Grab attachment to sewing machines to form weave of needle and bottom threads - Google Patents

Description

This invention relates to a claw attachment to sewing machines for intertwining needle and lower yarns using a holder, the cavity of which serves to rotate the bobbin case with the bobbin, and the side wall is provided with a slit for inserting and removing a needle thread loop that is circled around the bobbin case with help, new grab. The proposed grab fixture is designed to provide a simple and robust design in which the friction of parts of the mechanism would be minimized.

In FIG. Figure 1 shows a section of the proposed device; FIG. 2 is a variant of it; FIG. 3-part holder; FIG. 4-7 other adaptations; FIG. 8-10 details of it.

The grip device for sewing machines, which serves to weave the upper needle thread from the bottom one that comes from the bobbin thread, has the following device. The bobbin (Fig. 1) is enclosed in a special kind of bobbin case b, which fits freely into the holder-box (Fig. 3), fixedly mounted under the machine plate. Housing holder. 2 consists of two halves separated by a slit 10 and connected by a jumper //, and a bobbin case with a shaper (FIG. 10) is inserted into it, with the end

the opening is closed by a door (fig. 8). The door is designed to change the bobbin. Along the slit 10 (Fig. 3), a rotary motion is performed that captures the upper thread Kdniec 4, 5 (Fig. 1) of the grapple 7. A top of the Upper yarn, a passage in the slot, slides along the facets (sides) of the bobbin case on the first half turn of the grapple. When the grapple passes through the lower position, the loop comes off its cone and, under the action of the nitrite, the gatel slides along the second half of the bobbin case. In this way, the process of circling the loop of the upper thread around the bobbin case is performed. FIG. 2, the mechanism for interlacing the threads is made in the form of a grapple (grapple), carrying in its housing the bobbin case 6 with a bobbin. Its action is similar to that described for the variant of FIG. 1. In the embodiment shown in FIG. 4. The bobbin case with the bobbin 13 is not removed and is placed between the elastic stops 14, consisting of balls pressed by the springs 15. The bobbin holder can be fixed in the proper position also with a conical head 76 and spring 77 or cones 18. In FIG. . 7, the holder is held by the balls 19, which are placed in the body of the holder. The subject matter of the invention. 1, A grapple attachment to sewing machines to form the interweaving of needle and lower threads using a holder, the cavity of which serves to accommodate the bobbin case with a spool, and the side wall is provided with a slit for looking at and removing a needle thread loop that is circled around the bobbin case using a grapple, different In that the bobbin case 6 (Figs. 1 and 2) is placed in the cavity of the holder 2 with a gap so as to suspend the cap with the help of the lower thread, in order to reduce friction. 2. In device g; on item 1, the use of spring-loaded ball stops 17, fixing the bobbin case 3 in the proper position. 3. When used in accordance with claim 1, use the hook of a grapple 7, equipped with tips of 4 liters 5, rerun; And each other.

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