CS251880B1 - Circular single-cylinder knitting machine - Google Patents

Abstract

The invention relates to a single-cylinder circular knitting machine for the production of hosiery and the like goods in rotary and reciprocatory knitting in at least one knitting feed with thread guides to which is assigned a device to move them into operational and non-operational positions. The invention solves the problem of elimination of catching the thread in knock-over sinkers belonging to raised non-operating needles 2 in reciprocatory running by moving the operating guide (12) into a raised position during passage of the non-operating needles (2) through the knitting feed, this being effected by a device consisting of a power element (14) assigned to the guide (12), switching means for the power element (14) and control means for the switching means. The power element may be an electromagnet or pneumatic cylinder and piston, the switching means may be an electric switch or air valve and the control means may be a cam. <IMAGE>

Description

The present invention relates to a single-cylinder circular knitting machine for the production of hosiery appd. goods of rotary and return knitting in at least one yarn-knitting system to which a device for theirs is associated. control to working and inepracing positions.

It is known that in small-diameter knitting machines for the production of hosiery and hosiery machines. sock goods, in the case of reversible knitting heel, resp. spikes, unwanted closure of the yarn into the hook of the open discarding sinkers, which is the cause of the yarn tearing during reversible knitting. This disadvantage is solved by the use of the auxiliary discarders, the so-called bluf-sinkers, which close the hooks of the open discarders so that the thread cannot be grasped by them. However, this solution considerably complicates the design and operation of the respective platinum locks. Furthermore, it is known that the platinum locks are arranged such that, at the incremental location where the thread can be trapped, the reference sinkers are closed and then opened so that the thread also cannot enter the hooks. Further, there are known solutions from twin-cylinder knitting machines, in which needle guiding hooks or needle-shaping are used to prevent thread seizure, but this cannot be applied to single-cylinder machines due to their differences to twin-cylinders.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome these disadvantages with a simple, non-demanding solution, which is achieved by providing a machine for moving the working conductor to an elevated position when passing non-vascular needles in knitting systems. an associated solenoid in which a switch associated with a rotating cam is connected to the winding, and a switch is incorporated in the electrical circuit of the switch.

The advantage of the invention lies in its simplicity and consequently in the possibility of a simple design of the platinum ring lid with a view to high knitting speeds and with respect to the reversible knitting of a plurality of two knitting systems.

1 shows schematically a partial axial section through a needle cylinder showing the working position of the heel guide when the thread is inserted into the working needles, FIG. 2 shows the same as FIG. 1, but the heel the waveguide is raised when non-working needles pass by,

Giant. Fig. 3 schematically illustrates the course of working needles in a knitting system showing the thread being laid; Fig. 4 schematically illustrates the position of the laid thread caught in the working needles when the wire is lifted when passing non-working needles through the knitting system;

Known single cylinder circular knitting machine for making hosiery. the goods are provided with a needle cylinder 1, the needles 2, which cooperate in forming the stitches with the Pdhazovy sinkers 3, are embedded in the longitudinal grooves. The machine is equipped with a return knitting system which has left and right locks 4 and 5 ( Fig. 3) with the respective counter-locks 4 * and 5 'and the middle lock 6 a. · the lifting locks 7, 8. The casting sinkers 3 are actuated by the outer and inner rings 9, 10 fixed in the cover 11. of which only the heel conductor 12 is shown. The conductors are actuated in a known manner by vertically movable rods 13, operated by a not illustrated mechanical transmission oid of the imaging drum of the machine. The anchor 14 * of the electromagnet 14 is attached to the heel guide 12, which is a pivotable member of the device that serves to move the needle to an elevated position when the non-working needles pass through the knitting system. The device further comprises a switch 15 connected to the coil circuit of the solenoid 14. The switch 15 is associated with a rotating cam 16 which controls its function and thus the function of the electromagnet. controlled by the imaging device of the machine, eg the imaging drum.

The function of the device described above is as follows. In rotary knitting, the switch 17 is turned off so that both the switch 15 and the electromagnet 14 are not powered and are therefore inoperative. The conductors are indicated by means of the rods 13. In reversible heel knitting, only the heel conductor 12 is in operation, where he is held by the spring 12 ', placing the thread P into the needles 2. The course of the working needles 2 is marked. (FIG. 3); the beginning of stretching of the hooks occurs at the discharge plane O. The angle of the yarn laying is acute. The switch 17 is closed, so that both the switch 15 and the solenoid 14 receive current. After ^{1 travel of} the last working needle 2, which knits the longest heel line through the retracting lock 4, the anchor 14 'of the electro-immunity 14 against the action of the spring 12' pulls the arm of the heel guide 12 and lifts it to the elevated position. 2. Lifting the heel guide 12 changes the yarn laying angle to the angle α1 (Fig. 4), which is less acute than the angle α.This makes it impossible for the yarn P to be laid under the noses of the open casting sinkers 3 and thus its disruption. After the needle cylinder 1 has been rotated to the dead center, the electromagnet 14 releases its armature 14 'and the spring 12' returns the heel guide 12 back to its working position.

The whole cycle then runs the same, but in the opposite direction of rotation.

The electromagnet 14 is controlled by a switch 15 which interrupts the power supply to the electromagnet winding. Switch 15 resp. its function is then controlled by the cam cam 16, the start and end of cam cam 16 controlling the moment of switching on and off of switch 15 and actually corresponds to the time course of the non-working needles 2 ‘around the heel conductor 12 within the smallest number of non-working needles. In the next knitting of the return heel, the heel rows are picked up and then added, making the arch of the non-working needles

2 '‘is changing. However, this practically has no effect on the knitting itself or on the possibility of catching the P d'o yarn.

Within the framework of the invention, it is also possible to operate the heel conductor 12 by means of a pneumatic system, wherein the actuator, i.e. the electromagnet, is replaced by a cylinder and a piston which is attached to the conductor. Furthermore, the shut-off means, i.e. the switch 15, is replaced by a supply valve and a cam can also be used as a control means. The supply valve is then connected to the pneumatic system pinwheel.

Claims (1)

SUBJECT Single-cylinder circular knitting machine for the manufacture of hosiery or the like by rotary and return knitting in at least one knitting system with yarn guides to which a device for controlling them in working and non-working positions is associated, characterized by a device for moving the working conductor (12) into position of the non-working needles through a knitting system in a return knitting system comprising an electromagnet (14) associated with the conductor (12), the winding of which is connected to a switch (15) associated with the rotating cam (16); 15) switch is engaged.