DE1255846B - Thread changing device for circular knitting machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

D04b

German class: 25 a-25/05

Number: 1255 846

File number: F 32892 VII a / 25 a

Filing date: January 4, 1961

Opened on: December 7, 1967

The invention relates to a thread changing device for circular knitting machines with more than two systems with a disc arranged inside the needle roller assembly at such a height that this lies between the loading and unloading positions of the thread guides and the inclined slots are less Has width which are directed opposite to the direction of rotation of the machine in which the threads retained by knitting can be withdrawn automatically and automatically when re-knitting can be pulled out again.

In a known thread changing device (German patent specification 807294) a disk is provided, which has two inclined slots that are opposite to the normal direction of rotation of the needle cylinder are directed. These slots are intended for a main thread and a reinforcement thread take up that during circular knitting in the manufacture of reinforced surfaces at times be held back from entangling. For guiding and holding the other threads is at the known device a thread clamp is provided which is substantially in the center of the cylinder is arranged. With the known device it is not possible to accommodate more than two systems, because here only half the circumference of the disc can be used to guide the threads. Furthermore you can the slots take up only a few threads.

The invention is based on the object of a thread catching device for a circular knitting machine to create with more than two systems, in which all threads to be changed without jamming and closing cut can still be safely kept out of the knitting process and brought back into it.

According to the invention this object is achieved in that the disc is circular and its peripheral edge serves as a guide surface for the threads in the waiting position, including their slots are provided with eyes.

Due to the circular design of the disc, only the number of systems that are actually on Perimeter of the needle cylinder can be accommodated, determining the number of systems. The eyelet slots allow as many threads to be held on hold as can be loaded and unloaded by each thread changing device on each system.

With reference to the figures of the drawing, a thread changing device according to the invention to be discribed. It shows

F i g. 1 is a schematic sectional view of a thread changing device and

Thread changing device
for circular knitting machines

Applicant:

Fabrique Nationale d'Armes de Guerre S. Α.,

Herstallez-Liege (Belgium)

Representative:

Dipl.-Ing. E. Prince and Dr. G. Hauser,

Patent Attorneys, Munich 60, Ernsbergerstr. 19th

Named as inventor:

Guido Azzolari,

Brignano d'Adda, Bergamo (Italy)

Claimed priority:.
Italy from January 5, 1960,

dated December 12, 1960

F i g. FIG. 2 is a plan view of the FIG. 1 shown device.

A drive device known per se is provided which drives a number of rocker arms 15. Each rocker arm 15 carries a holder 18, the end of which is arranged in a predetermined position relative to the rotating needle roller assembly. At the free end of the holder 18 carries a thread guide 19, the lower end of which has a lateral extension 20, to which the upper end of a thread guide tube 21 is attached for passing a thread. Within the needle ring indicated at 51, a disk 41 is arranged at such a height that it lies between the insertion and unfolding positions of the thread guides 19. This disk 41 has, as FIG. 2 shows, slits 47, 48 of small width, which are directed opposite to the direction of rotation of the machine and are provided at their end with eyes 49, 50; in these slots 47, 48 the threads ae held back by the knitting in FIG. 2 can be withdrawn automatically and pulled out again automatically when knitting again.

The disk 41 has an axis 42 which is secured in the tubular end 44 by means of a clamping screw 43 a support bracket 45 is attached. The support bracket 45 is fastened to the component 17 by means of screws 46.

709 707/108

Claims (1)

In the illustrated embodiment, a thread changing device for a knitting machine is provided, which has a main system with five threads and three additional systems with one thread each; an elastic thread is also fed to one of the additional systems. This means that this knitting machine processes practically nine threads. The five threads of the main system, namely the threads α to e, are fed through the thread guide system 36, while the threads /, g and h and the elastic thread / are fed through the thread guides 19. To explain the operation of the thread changing device, it is assumed that stockings or socks are to be knitted which have five main parts, namely the edge, the lengths, the heel, the foot and the toe. The machine must be constructed in such a way that it can knit the socks or stockings in continuous and uninterrupted order; the movements of the needles on the one hand and the movements of the thread changing devices on the other hand must be controlled in such a way that the feeding of the threads α to / takes place in such a way that the threads α and / and the elastic thread / are available for knitting the edge The length of threads b, f, g and h, thread c for knitting the heel , threads b, f, g and h for knitting the foot , and thread c for knitting the tip. A thread d, which is made of cotton, is also present between the individual stockings or socks , and a thread e is also provided to create a separation zone. In the waiting state of a thread, that is, when this thread in question is not knitted, such as the thread, this thread goes through the disc 41, for example through the eye 50, and is guided by the thread guide tube 21 of the associated thread guide, which is in the rest position is located. If this thread g is to participate in the knitting work again, which is automatically controlled by a programmed control device, then the thread guide is lowered and the lower end of the thread guide tube 21 brings the thread g to a height that is between the normal height of the upper ends of the needles 51 and the height of the disk 41. In this position the thread g, which passes through the disc 41 and the eye 50, is in contact with the upper surface of the disc 41 and can be pulled down at the edge. A loop is formed into which needles moving upwards can subsequently grip. During their downward movement, these needles 51 take the loop down with them, while the thread g temporarily remains on the corresponding part of the disk 41. When the needle 51 passes in front of the slot 48 belonging to the eye 50, will ίο the thread g released and can be fed to the needles. If, for example, the thread g is to be brought into the waiting position, the thread guide is raised by an appropriate control, and consequently the thread g automatically comes into contact with the circumference of the disk 41. At the moment when this thread g passes the slot 48 , it is captured by this slot, and this slot inevitably leads this thread to the eye 50 in the waiting position. The same process also takes place with the threads α to 7 coming from the other thread guides, the waiting position or the knitting position being determined by the position of the thread guides. Claim: Thread changing device for circular knitting machines with more than two systems, with one arranged inside the needle roller ring at such a height that this between the The thread guide is laid in and laid out and has inclined slits of small width, which are opposite to the direction of rotation of the machine in which the from Knitting retained threads can be withdrawn automatically and automatically when re-knitting can be pulled out again, characterized in that the disc (41) is circular is designed and its scope as a guide surface for the waiting position Threads are used, for which purpose the slots (47, 48) are provided with eyes (49, 50). Considered publications:
German patent specifications No. 807 294, 504 723,
503,418; British Patent No. 612,819;
U.S. Patent Nos. 2,500,337, 2,070,458. 1 sheet of drawings 709 707/108 11.67 © Bundesdmckerei Berlin