SU54889A1 - Sewing machine for sewing buttons with ears - Google Patents

Description

The invention relates to a sewing machine for sewing buttons with dryers, in which the needle bar frame receives vibrations — through a system of levers and pull from a disk with a fist groove, borrowing it from the main shaft.

In the proposed sewing machine of this type, in order to automatically reproduce the tacks, the ha of the needle bar frame transfer system of the needle bar is made of two parts entering one another. Until the moment of fastening, these parts are connected to each other by means of a spring-loaded pin, which is brought out of the working position by the action of the cam disc on the intermediate links.

The drawing shows a diagram of the proposed sewing machine.

A conic gear 2 is jammed on the crankshaft 7, the .cf is coupled with the same gear 3, which is integral with the disk 4. In the eccentric groove 5 of this disk, roller 6 is mounted, mounted on the shoulder of the lever 7, the other arm of which is pivotally connected to the thrust S , 9. This traction is made of two parts entering one another 8 to 9, which can be interconnected by means of a pin 10 attached to a connector 7 /, which is pressed to a part of 9 tons by a spring 72, with pin W through the hole in part 9 and enters the slot of part 8. To free The end of the connector 7 / is attached to the plate J3, the cutout of which includes the dog} 4 attached to the axis 75; when the machine is in operation, this pawl can rotate with the axis / 5 Il while pulling off the plate 13, and with it the connector 7 / from the 8, 9, with two parts 8 and 9 of the disk being separated.

A spring 76 serves to press the pawl to the connector. At the lower end of the axis 75, the rod 16 is fixed with a roller 77, which is pressed against the rim of the cam disc 18. The end of the 9-pin part is connected to the frame 19 swinging on its axis, the end of the rod 20 enters into its slot. articulated two shoulders rychagom 27, fastened with a frame 22 needle bar 25.

To establish the constant number of needles of the needles of the needle (required in fifteen injections, with the addition of three injections), and to turn off the machine after this machine, a mechanism consisting of an eccentric 25 fixed on the axis 24 is used to establish the button stitching. , tioMeuieHHoro in the square of the swiveling prodnigatel 26 disk 18, freely sitting on about: and 24 and supplied with fifteen teeth. During its swing, the propulsor 26 comes at one end between the teeth of a disk / 5 and for one revolution of the eccentric 25 (equal to the period of the engine 26), turns the disk one notch, its end is connected to the crosshead 27, which runs in the rails 28. To the disk two cams 29 and 30 are attached, of which the cam 29 attached to the rim of the disk serves to rotate through the axis 16 axis / J to disengage the parts of the thrust rod and P, and the cam 30 fastened at the end of the disk to deactivate the trigger mechanism by means of the two shoulders lever 31, 32. 24 is rotated by means of two bevel gears 33, 34, seated on the shaft / and axle 24. By receiving a rotational movement from the shaft / through bevel gears 3 and 2, disk 4, due to the eccentric groove 5, the lever distinctive, and tgu 8, 9 in reciprocating motion. At the moment of pinching the button of the part, the Pt gi are interconnected by means of a pin 10. As a result, the movement from the rod 8, 9 through the rod 20 and the lever 21 is given to the needle bar frame, which starts to swing in a radius equal to the length of lever arm 2 /. The frame swing along the chord is 3-4 mm, which corresponds to the required amount of movement of the needle bar and needle prick from the outside and the inside of the button ear. Frame J9 serves to regulate the swing amplitude of the needle bar 22 frame. After fifteen turns, the eccentric 25 and, therefore, after turning the disk 18 by fifteen teeth or by a full circle, cam 29, pressing the end of the rod J6, rotates the axis / 5,

moreover, the dog 14 retracts the connector // from part 9, then the pin 10 emerges from the slot of the part 8 tons, which makes three idle movements; the frame of the needle bar does not receive a radial movement and the needle bar makes three needle pins at one point.

To install the button to be attached, a fork 35 is attached to the rod 55, d, the right end of which is fastened with a roller 38 pivoting with a spindle in the sub-holder 37; To the same roller 38, the second end of the sling rod is attached, the end of which is connected to the pedal 41 by means of the cable 40.

Having inserted the button 42 into the plug 55 so that the button paw had under the needle 43, the pedal 41 is pressed, as a result of which the roller 38 turns and lifts the plug 55 with the button. Under the needle 43, insert the sewing and stop pressing the pedal, as a result of which the fork 55 under the action of the spring 44 acting on it through the rod 45 and the curved rod 46 with the roller 47, is lowered; the other end of the rod 46 has the form of a foot 48, which serves as an additional clamp for sewing.

To start the machine, the worker presses the starting pedal 49, with a ha 50 through fork 5 / turns frame 52 around the axis 55. Then finger 54 leaves the working pulley notch and fork 55 transfers the belt from the idle pulley to the worker transmitting the rotary shaft motion. At the same time, the short finger 52 of the two shoulders 5 /, 32 under the length of the arm (; his shoulder 5 / moves to the right (according to the drawing) and sinks into the notch of the pad 33 at the lowered end of the fork 5 fastened with the frame 52) and closes the chassis of the machine in working position.

After 13 stitches, disc 18 makes a full turn, and the long arm 5 / of the lever will be lifted then passed under it at the turn. the disc 18 by the cam 30, the end of the short arm 52 of the lever will slide off the pad 33 and stop holding the plug 5 / in the lowered polo