SU779466A1 - Sewing semiautomatic device for part treatment over given contour - Google Patents

Description

The invention relates to the field of sewing and shoe manufacturing and is used when sewing together blanks having dual contours of seams. A semiautomatic machine for machining parts according to a predetermined contour is known, which contains a copying mechanism, a copying disk, mounted either to the semi-automatic shaft and connected with the mechanism of longitudinal and transverse movement of the clamps for the parts and the stop mechanism, and the control circuit 1. its application, since in one cycle it can only draw one contour of the workpiece. The purpose of the invention is the expansion of the technological capabilities of a semi-automatic sewing machine. This goal is achieved by the fact that the sewing semi-automatic machine for machining parts along a predetermined contour, containing a sewing mechanism, a copier mounted on the shaft of the semi-automatic machine and connected with the mechanism for moving and lateral movement of the clamps for parts and with the mechanism of stopping the control circuit, additionally maintains the means for displacing the clamps parallel to the contour of the workpiece, associated with the control circuit and with the mechanism for the longitudinal and transverse movement of the clamps, and the latter are spring-loaded. In addition, the means for displacing the clamps parallel to the contour of the workpiece consists of an electromagnet, the core of which is connected to the clamps by means of a rocker arm. FIG. 1 shows the structural scheme of the known semi-automatic; in fig. 2.- electrical control circuit; in fig. 3 - contour of the reproduced stitch. | The semiautomatic sewing machine consists of a sewing mechanism .1, a copier disk 2, a mechanism 3 for longitudinal and lateral movement of the clamp, which consists of —from the top 4 and bottom 5 plates, spring loaded with springs b and 7, means for displacing the clamps, having an electromagnet 8, hinged on mechanism 3, rocker 9, hinged electromagnet connected with a core with clamping plates 4 and 5, return springs 10, guides 11, protrusion 12 fixed on a cam 2, gear 13,

the front wheel rotates the gear 14 with a fixed protrusion 15, the pawl 16, the automatic stop frame 17 and the hook and needle thread trimming mechanism 18. The electrical control circuit of the semi-automatic includes a limit switch B1 connected to the pedal for opening the clamping plates, switches B2 and OZ, connected recorded with a protrusion on a copier disk, switch B4, associated with the start pedal of the semiautomatic device, electromagnet EM1 start, electromagnet EM2

shifting clamping plates, electromagnetic relays P1 and P3, and electromagnetic relay P2 with slower tripping times. The described semiautomatic works as follows. - By pressing the pedal to open the clamping plates, the upper 4 of which open under the action of the spring 6, the workpiece is installed in the area of the sewing mechanism 1 between the lower plate 5 and the upper 4, the pedal is lowered and under the action of Spring 7 the upper plate 4 closes fixing the workpiece. After pressing and releasing the start-up pedal, the switch B4 (Fig. 2) turns on, when the relay is activated and the relay contacts close the POWER circuit of the start electromagnet EM1 and relay P2. Relay P2 is triggered, contact P2 is closed. The semiautomatic device was put into operation. The mechanism for moving the clamps receives movement from the copier disk 2 in the longitudinal and transverse directions along the contour (Fig. 3) ABCDE (the letters indicate the order of the prick sequence) Copier and disc. In this case, the relay P1 is triggered, by the contact P1 of the circuit the power supply of the electromagnet EM2 moves the CLANKS, the core of which by means of the rocker arm 9 displaces the clamps with the workpiece along the guides, the contact P1 opens the circuit relay P2. At the same time, the OZ switch disconnects the power supply circuit of the relay, and

the relay P2 is more active than the opening and closing time of the OT, therefore the power supply circuit of the relay RZ is closed by the 6N cycle P2. The copier disk makes a second turn and the mechanism for moving the clamps with the workpiece moves along contour A. (After the completion of the second revolution of the copier disk, the protrusion 15 on the gear 14, rotated from gear 13 with a gear ratio of 1: 2, sits on the shaft of the copier disk, turns the dog 16 is counterclockwise, which frees the machine's automatic shutdown frame 17. The VZ switch disconnects the RZ relay, which opens the P1 contact circuit with the P3 contact, the P3 contact opens the P2 power supply circuit. When the semiautomatic device stops, the pedal for opening the clamps is pressed, the switch B1 opens the electric circuit, 5 the trimming mechanism 18 cuts off

Shuttle and needle threads, clips under the action of the spring 10 are returned to their original position.

0 A semiautomatic sewing machine differs favorably from the indicated prototype in that it is possible to increase the processing cycle without changing the program volume of the program carrier, while obtaining a double seam contour, with the second contour being parallel to the first.

Claims (2)

1. A semiautomatic machine for machining parts according to a predetermined contour, containing a sewing mechanism, a cam disk mounted on the semiautomatic machine and connected to the mechanism of longitudinal and transverse movement with a clip for parts and with a rest mechanism, and a control circuit characterized by what, 0 in order to enhance technological capabilities, it has a means for displacing the clamps parallel to the contour of the workpiece, associated with the control circuit and the mechanism of the longitudinal and transverse movement of the clamps, and the latter are spring-loaded. 2. The semiautomatic sewing machine according to claim 1, wherein the means for displacing the clamps parallel to the contour of the workpiece consists of an electromagnet, the core of which is associated with the clamps. through the rocker arm. Sources of information 5 taken into account in the examination 1. USSR author's certificate 621815, cl. About ..05 At 21/00, 1976. PI vQI Bd -Q | Q- P2 rf about- Fy / Ai