RU198787U1 - DEVICE FOR ATTACHING THE BENDER TO THE SEWING MACHINE - Google Patents

Abstract

The utility model relates to devices for processing (edging) the edges of parts with materials with a high surface density at various angles.

The technical task and the technical result of the utility model is to expand the technological capabilities of sewing machines by simplifying the transportation of the processed material and the edging tape, as a result of which the stitch length is constant, and, consequently, the quality of the stitch is improved.

The technical result is achieved in that the device for attaching the edging to the sewing machine contains a shaft that reciprocates in the supports fixed with screws on the platform of the sewing machine, on which the edging, bracket is rigidly fixed, a slider is inserted into the straight groove of the bracket, pivotally connected by means of a finger with a lever on which a transporting bar is fixed, receiving movement along an ellipse from the shafts of the mechanism for moving the material to be processed on the sewing machine. 3 ill.

Description

The utility model relates to sewing machine building, in particular, to devices for processing (edging) the edges of parts with materials with a high surface density at various angles.

Known device for fastening the edging on a sewing machine, consisting of a base equipped with an arcuate groove, means for attaching the edging (stand, bracket with a lock, cracker, spring-loaded locking lever) and changing its position relative to the working area of the sewing machine (No. 1560661, class D05B 35/06, 1990).

Known is a device for edging a strip of fabric sections of parts, containing a strip shaper and a pressure plate fixedly mounted on the machine platform, a slider fixed on the pressure plate, connected by means of a two-armed lever and a hinge axis to the feed shaft of the fabric engine mechanism, while the pressure plate additionally has a pusher , connected by means of telescopically located links with a two-arm lever and an axis of displacement of the slider (No. 1622460, class B05B 35/06, 1991).

The disadvantage of these solutions is their limited application, the complexity of transporting the processed material and edging tape, especially if the material of the tape has a high surface density, uneven stitch length, and, consequently, instability of the quality of the resulting stitch.

The technical challenge and technical result of the utility model is to expand the technological capabilities of sewing machines.

The technical result is achieved in that the device for fixing the edging on the sewing machine contains a shaft that reciprocates in the supports fixed with screws on the platform of the sewing machine, on which the edging, the bracket is rigidly fixed, a slider is inserted into the straight groove of the bracket, pivotally connected by means of a finger with a lever on which a transporting bar is fixed, receiving movement along an ellipse from the shafts of the mechanism for moving the material to be processed on the sewing machine.

FIG. 1 shows a structural diagram of a device for attaching a binder to a sewing machine.

FIG. 2 shows the unit for moving the edging tape.

FIG. 3 shows the unit for moving the processed material with an edging tape.

The device for fastening the edging device on the sewing machine contains a shaft 1 that reciprocates in the supports 2, 3, fixed with screws 19 on the platform 20 of the sewing machine, on which the edging device 4, bracket 5 is rigidly fixed, a slider 7 is inserted into the straight slot of the bracket, pivotally connected by means of a finger 8 with a lever 10 having a fork 11, on which a conveyor bar 12 is fixed, receiving an elliptical movement from the shafts of the mechanism for moving the workpiece material of the sewing machine.

The device for fastening the edging device to the sewing machine contains a shaft 1, reciprocally moving in the supports 2, 3, fixed with screws 19 on the platform 20 of the sewing machine. At the end of the shaft 1, a bezel is rigidly fixed 4. On the shaft 1, by means of a screw 18, a bracket 5 with a straight groove 6 is fixed, along which the slider 7 moves, pivotally connected to the pin 8. The pin 8 is fastened by means of a screw 9 to the lever 10, which has a fork 11, on which is fixed rack 12. Lever 10 with rack 12 receive movement in an ellipse from the shafts 13, 14 of the mechanism for moving the material to be processed, through the slider 16 inserted into the fork 11 and rocker arms 15, 17.

During operation of the sewing machine, when the needle 21 (Fig. 2) pierces the workpiece material 22 with the edging tape 23, the rail 12 drops below the needle plate 24 and moves forward (a). Together with the rail 12, the binder 4 moves and pulls the braid 23 by the stitch size.

When the needle 21 comes out of the material 22 to be processed and the braid 23 (Fig. 3), the rail 12 begins to move back (b) and transports the material to be processed 22 with an elongated braid 23 by the stitch size.

When using the proposed device, the transporting force of the material being processed and the edging tape is reduced, as a result of which a constant stitch length is achieved, and, consequently, the quality of the stitch is improved, especially when using a tape with a high areal density.

Claims (1)

A device for attaching the edging device to the sewing machine, containing a shaft that reciprocates in the supports fixed with screws on the platform of the sewing machine, on which the edging device is rigidly fixed, a bracket, a slider is inserted into the straight groove of the bracket, pivotally connected by means of a finger with a lever on which a transporting rail is fixed, which receives movement along an ellipse from the shafts of the mechanism for moving the material to be processed on the sewing machine.

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