SU38413A1 - Zatel knots for sewing machines - Google Patents

Description

The proposed knotting unit for sewing machines with a fixed bottom thread holder and a rotating looper is designed to give the opportunity without friction of parts of the mechanism, by achieving free space around the bottom thread holder, to increase the number of stitches per unit of time and, consequently, to increase machine productivity.

In FIG. 1 shows a general view of the nodes of the recipient (in section) and FIG. 2 and 3 - details of a different form of its implementation.

The knot consists of a fixed holder 2 of the lower thread and of a rotating holder of the thread 1. The holder of the thread is held in a certain position by two cones 3 and 8, of which the cone 8 is pivotally attached to the platform of the machine. Through the cone 8 passes the finger, on which the plate 9 is fixed, pressing under the action of the spring 10 to the holder 2. The second cone 3 is fixed on the rod 4, which passes inside the hollow shaft 5, which carries the looper and is rotated by the pin 12. The rod 4 is stationary Attached to the platform 6 of the machine using the rack 7.

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The process of interlacing the upper thread with the lower one to form a normal stitch knot is as follows. Looper: The inlet 1 with its tip 13 picks up the needle thread and, with a downward stroke, enlarges the loop, which simultaneously expands, hits the holder 2 of the lower thread and slides on both sides, the passage between the cones from the drag and drop catheter 1. From the loop-catcher 1 with the loop through the lower center, the thread lifts the well-known thread lever, which is not indicated on the drawing, and thus forms a knot between the threads. On. FIG. Figure 2 shows a loop catcher with a groove 14 in which the protrusions 15 of the bottom thread holders 2 are inserted (Fig. 3).

The subject matter of the invention.

1. Nodes for sewing machines with a fixed bottom thread holder and a rotating hinge. With a press, characterized in that the bottom thread holder 2 is placed between the cones 8 and 3, of which the cone 8 is pivotally attached to the machine platform and carries a spring-loaded plate 9, which presses to the holder 2, the cone 3, is shown; it is eaten on the sleeve 4, passing inside the canopy of the shaft 5, which serves to rotate the loop head.

2. The form of execution of the knot knots. According to claim 1, characterized in that the holder 2 of the lower thread (Fig. 3) is provided with protrusions 15 entering the groove 14 (Fig. 2) of the loop catcher 1.

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