SU414334A1 - SEWING MACHINE - Google Patents

Description

The invention relates to light industry and to the design of a sewing machine.

The known machine, comprising upper and lower sleeves, in which needles are located, receiving reciprocating movement towards and at an angle to each other from the crank mechanisms, is not adapted for grinding two fabrics with a filler between them along two closed contours.

In the proposed sewing machine for expanding the technological capabilities of the sleeve, they are hingedly connected to each other and equipped with a mechanism for moving them in a vertical plane, and the lower pyKatB is equipped with a free-wheeling coupling, the outer cover of which has a grooved surface ensuring the transport of the material.

In addition to this, the mechanism for moving the sleeves can be made in the form of kinematic chains connected with the drive of a spring-loaded rod carrying rollers, which are located in the profile grooves in the sleeves of the mashina and the lock. On the upper arm of the machine, it is advisable to install a transfer roller with a (grooved surface, periodically interacting with the grooved surface of the ring coupling.

FIG. Figure 1 shows schematically the proposed screw machine in a longitudinal section: FIG. 2 is a front view of the machine with an indication of the direction of the longitudinal section of the machine along the line A - A, shown in “a of FIG. one; in fig. 3 is a section along the line B - B in FIG. one.

At first, the machine produces the grinding of two fabrics with a filler between them in a closed circle, with a large diameter circle. The NEEDLES then go out of the fabric, the upper and lower threads are cut, and the machine moves closer to the center of the circle of small diameter to grind the fabrics. After trimming the yarns, the machine automatically moves to the idle position.

A round billet consisting of two fabrics with a filler freely rotates on a special stand with a roller motor of a fabric for a stitch length (not shown in the drawing).

The machine is mounted on a slider /, which is inserted, into the guides for moving therein from the pneumatic drive to the working position. On the slider is fixed stand 2, | To which the lower sleeve 5 and the upper sleeve 4 are pivotally attached.

The sleeves 5 and 6, in which the hollow shaft 7 is placed, are pressed into the upper sleeve, in order to deflect the upper needle. Vutr.i shaft pressed bushings 8, in which is placed the shaft 9 of the upper needle. The shaft 7 is fixed to the rocker arm 10, and on the shaft 9 an eccentric 11, which is fitted with a connecting rod 12, which is pivotally connected to the two-arm lever 13 (see Fig. 2). One shoulder lever is pivotally connected to the upper sleeve 4. Another lever arm is connected to the arm of the rocker arm 10 through the shaft 14. The drum 15 is fixed to the shaft 9, which is connected to the lower shaft 18 by an endless belt 16, fixed to the lower shaft 18. On - The frame 19 is fixed to the shaft 7, in the guides of which the rod 20 of the upper needle is placed. On the shaft 9, the hinged arm 21 is rigidly fixed. The crank shoulder is connected with a pin 22 to the connecting rod 23. The lower connecting rod head is connected to the rod 20 of the needle through the connecting shank 24. In the upper tide (the sleeve is placed a spring-loaded brace 25, to which a screw 26 is attached for transporting the fabric 27 with a grooved surface. In the lower sleeve 5, similarly to the upper sleeve, is placed in two bushes 28 a hollow shaft 29 inside which is placed in bushes 30 shaft 18 of the needle needle. The bottom needle frame 31 is rigidly fixed on the rug 5. The needle rod 32 is located in its guides. From the shaft 18 through the crank 33, the finger of the crank 34, the rod 35 and the connecting pin 36, the rod 32 receives a return; translational motion s.

The lower sleeve 5 is equipped with a roller overrunning clutch 37, the outer cage of which has a corrugated surface that provides transportation of the material. An asterisk 38 is rigidly fixed on the hollow shaft 29, in the in-hollows of which there are spring-loaded cylindrical rollers 39 (see FIG. 3).

The drive of the sewing machine is an electric motor 40 mounted on the slider 1. From the electric motor, through pulley 41 and belt 42, a pulley 43 gets worn freely onto the shaft 18. The pulley is designed as a pair of roller clutch, inside which are two shoulders 44, inside whose shoulders are connected to rollers that are jamming. The outer shoulders of the arms cover the cone 45, loosely mounted on the shaft 18.

Upper and lower sleeves are connected through U-shaped grooves. On the protruding parts x ikkavo-in there are profile grooves, -in which the rollers 46 are put on m 47, rigidly connecting an oo with the rod 48 inserted into the guide 49. The plug of the guide is inserted into the groove of the cone 45. -the casing of the directing shaft (the spring-loaded retainer 50 is fixed, it sticks into the hollow of the rod 48. The roller 51 is fixed on the rack 2. The bracket 52 is fixed on the slider 1, the carrier -the guide 49 with the spiral worn spring 53, one end of which rests on the bracket 52, and the other - on the nut 54. The guide 49 is connected nnevmonilindra with the rod 55 (not shown).

In Bpe.MiH of the machine operation, the fabric (not shown in the drawing) is clamped on a freely rotating stand, located between the holder, the overrunning clutch 37 and the roller 27 with a grooved 5 surface. When the electric motor is turned on, the pulley 41, through the strap 42, rotates the pulleys43, and through it the levers 44, the roller clutches and the shaft 18. From the shaft through the drum 17, the belt 16 and the drum / 5 receives rotation of the shaft 9. 1: 1 get the movement of the crank-shatunnye mech. And the rods 20 and 32 needles, located at an angle. In this case, the needles receive a reciprocating motion, mutually 15 wire loops to each other after passing them through the fabric. Under the action of the eccentric 11, the shatun 12 oscillates the two shoulders lever 13 through the tu 14 (see fig. 2), oscillates the beam 10 and the shaft 7 of the deflection of the upper needle. Frame 0 19 and the upper needle bar 20 oscillate along the stitch line. Asterisk 38 commits. the oscillating motion and through the rollers 39 wedges the o-boom of the overrunning clutch 37, together with it the rotational pulsating 5 motion. The product sandwiched between the sleeves 37 and the roller 27 moves by an amount equal to the stitch length. The rod 20 of the upper needle is deflected to the lower position by the same amount.

0 After the completion of the closed cycle of operation, the pneumatic cylinder is turned on, the scraper 55 of which moves to the right, moving the guide 49 and the rod 48. The rollers 46 move along the profile grooves. At this time, the 5th shoulder of the guide 49, which is polished in the form of a fork, leads the cone 45 out of contact with the two shoulders 44, and the clutch disengages from STI 43, which will freely rotate on the shaft 18. Simultaneously, the roller 5 0 moves along a horizontal direction. to my site, spring-loaded latch 50. The machine stops. Further movement of the rod 55 to the right leads to rotation of the lower 3 and upper 4 arms on the axis 56 under the action of the STVI6M rollers 46 moving along the inclined sections of the profile grooves. The rods 20 and 32 needles, the yoke 37 and the roller 27 move away from each other, withdrawing the needle from the fabric, and the retainer 50, interacting with the inclined plane with the roller 51, comes out of engagement with the rod 48. The movement of the mask to the non-working position occurs further movement of the guide 49 to the right, which with its support moves the brackets 52 and the sliding frame / along the 5 guides. The mechanism for trimming the upper and lower threads produces -Cutting and pinching the 1-END of the threads (not shown in the drawing). Turning the machine into its working position occurs in reverse order, 0 i.e. pressing the pneumatic button, including the pneumatic drive in the opposite direction.

The rod 55 moves to the left a guide 49, a nut 54 and, compressing the spring 53, simultaneously moves the slider / up to the stop, which o-borders the machine from the idle position to the working position. The cone 45 will then move along the shaft 18 to the levers 44. At this time, the latch 50 will move along the roller 51 and under the action of the spring will engage with the rod 48. The rod moves the rollers 46 first along the inclined grooves, bringing the sleeves 3 and 4 to the close -shaped grooves of the rack 2. In this case, the holder 37 and the roller 27 clamp the fabric and the needles enter it.

Then the rollers 46 continue to move along the profile grooves, and the cone 45 will come into contact with the levers 44, connecting the tongue 43 through the coupling to the shaft 18. The grinding starts, after the KOTOiporo is finished, the drive 55 automatically moves the rod. The process is repeated.

Subject invention

Claims (3)

1. A sewing machine containing upper and lower sleeves in which needles are located that receive a reciprocating movement towards and at an angle to each other from the curvature-shatz mechanisms that are kinematically connected with the drive, in order technological hoops, the maschine sleeves are hinged to each other and equipped with a mechanism for moving them in a vertical plane, and the 1 LOWER hose is equipped with an overrunning roller clutch, which has a grooved surface on the outer sleeve sportirovanie material. 2. The machine according to claim 1, characterized in that the mechanism for moving the sleeves is made in the form of B (kinematically associated with the drive a spring-loaded rod carrying rollers located in profile grooves in the sleeves of the machine, and a lock. 3. The machine according to claim 1, characterized in that a transport roller with a corrugated surface, periodically interacting with the corrugated surface of the overrunning clutch, is installed on the upper rsha of the machine. jrj | ..mife, j 12 Vi 29 Rig.d