DE1204355B - Method for knitting on multi-system circular knitting machines - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

D04b

German class: 25 a -25/05

Number:
File number:
Registration date:
Display day:

S 74299 VII a / 25 a

June 12, 1961

November 4, 1965

The invention relates to a method for knitting on multi-system circular knitting machines in which for determining the beginning or end of an auxiliary thread fed to an auxiliary system in the Knitted fabric when switching this auxiliary system on or off, the first or last needles that the Knit the beginning or the end of the inserted or removed auxiliary thread, knit the auxiliary thread only on Form the main system together with the main thread fed there into double-thread stitches.

Up to now it has been customary to place the beginning or the end of the auxiliary thread just behind the auxiliary system separate, with the inserted auxiliary thread often detached from the goods.

The invention is therefore based on the problem of the transition from two-system to one-system Knitting and vice versa start and end of the auxiliary thread fed to the auxiliary system by forming to anchor double-threaded stitches in the fabric.

This object is achieved according to the invention in that the beginning or the end of the auxiliary thread is only separated from the thread cutting device arranged there on the main system after Method for knitting on multi-system circular knitting machines

Applicant:

Singer-Fidelity, Inc., Philadelphia, Pa. (V. St. A.)

Representative:

Dipl.-Ing. W. Meissner and Dipl.-Ing. H. Tischer, Patent Attorneys, Berlin 33, Herbertstr. 22nd

Named as inventor:

Peter A. Mahler, Philadelphia, Pa. (V. St. A.)

Claimed priority:

V. St. v. America July 12, 1960 (42 383) - -

Lines are shown to explain the operation of the draft tube.

With reference to the drawings, the method shown in FIGS. 1 to 9 explained circular knitting machine

the first and last needles, the auxiliary and 25 a needle circle 15, which is used to carry out a knit the main thread together, arranged in a needle cylinder 16 at the take-off rotary movement lock part of the main system is withdrawn so far, and containment plates 17 (see Fig. 3). Within have become that their tongues are closed. of the needle circle 15 is a rotatable dial 21

The invention will hereinafter be arranged, for example, for rotation with the needle cylinder 16 with reference to the accompanying drawings 30. The dial 21 has a series of support plates 22 and also has a fig. 1 is a partial plan view showing the sinker ring gear 23 which, as shown in FIGS. 1, 2 and 4 shown, lock cap of a multi-system circular knit is provided on its circumference with teeth 24, the machine with a main and auxiliary system shows, have radial guide surfaces 25 , which on their, with certain parts for the purpose of better illustration 35 upper edge in a Cutting edge 26 run, the invention are omitted; A stationary sinker lock cap 31 is shown in FIG. Fig. 2 is an enlarged sectional view taken along dial 21 and bearing cutoff

elements and guide pins, as described in detail below.

The needle circle 15 is surrounded by a tongue ring 32, which is interrupted by systems that in the present case are identified by the reference numerals 33 and. The main system 33 has a plate 35 and several thread guides 36. That

the line 2-2 of FIG. 1;

3 and 5 are sectional views taken along lines 3-3 and 5-5, respectively, of FIG. 1;

F i g. 4 is a partial perspective view of a cutting element as shown in FIG. 2 shown;

F i g. 6 is one of the F i g. 2 similar sectional view
on a reduced scale, those in broken lines
the positions of the lock parts relative to the position of the auxiliary system 34 in 45 comprises a plate 37 and several of the FIGS. Figure 2 shows cut-off elements shown; Thread guide 38 on. In accordance with the

- - ■ - - the usual procedure are the needle cylinder

and rotated the dial, and the thread guides 36 and 38 in time coincidence with the Needle cylinder 16 operated by a conventional device (not shown) which is a pattern drum and pattern chain has to insert threads

F i g. Fig. 7 is a partial perspective view showing the operation of the thread cutting device;

FIG. 8 is a side view of that shown in FIG Components;

F i g. 9 is a sectional view taken along lines 9-9 of FIG. 1 with a suture in full stretch 509 720/30

and interpret. Suction tubes 39 and 40 are above the dial 21 to the non-working threads and remove the cut thread ends from the machine as described below is described.

A thread cutting device 28 and 29 is provided for each system. Any thread trimmer 28,29 cooperates with the cutting edges 26 of the toothed ring 23 in order to cut the thread, which lies over the edge 26. The thread cutting device 28 for the main system 33 works in such a way that only the threads are cut that are laid or laid out on the main system it will not take effect to cut the threads that are laid on the auxiliary system or be interpreted. In the same way, the thread cutting device 29 is effective for the auxiliary system 34, in order to cut off only the threads inserted or laid out by the thread guides 38.

In the case of the FIGS. 1 to 9 explained according to the invention Embodiment, the thread cutting device 28 has a cutting edge 44 on a Holder 45 is arranged, which in turn is attached to the sinker cap 31. The cutting edge 44 ends at its free outer end in a downward projection 46 on the upper Surface of the tooth 24 of the toothed ring 23 rests. As in FIG. 1, protrusion 46 is coming with the ring gear 23 at a point slightly in front of the auxiliary system 34 engaged, so that the auxiliary system 34 laid and laid threads not the separation by the projection 46 of the Cutting edge 44 are subject.

In the operation of the thread cutting device 28, the laid-out thread YI, e.g. B. brought into engagement with the projection 46 of the cutting edge 44 by means of the thread guide 36-2 through the needle circle 15 and the toothed ring 23. As shown in Fig. 1, the thread YI passes over the sinker cap generally in a straight line between the projection 46 and the blade 44 and the retracted thread guide 36-2. As in FIG. As shown in Fig. 1, the thread passes under the blade 44 and holder 45, under the outermost corner of the suction tube 39, under the wire 48 and then up to the raised thread guide 36-2. When the projection 46 cooperates with the cutting edge 26 of the tooth 24, the thread YI is severed, and its severed end is drawn up into the suction tube 39, the thread YI then occupying a position adjacent to the other non-working threads Y-2, which extend from the inactive thread guides 36 to the suction tube 39. It should be noted that the elongated shape of the nozzle of the suction tube 39 places the inoperative yarns Y-2 in layers that are not in the path of movement of the yarns YI and Y-3 across the top of the dial, causing each Influence between non-working threads and the inserted and laid-out threads is prevented.

The main thread Y-3 is inserted by the thread guide 36-1 before laying out the thread YX. The main thread Y-3 is inserted by operating the thread guide 36-1 so as to draw the main thread Y-3 downward from the suction tube 39 into the needle circle 15. It should be noted that the thread cutting device 29 is arranged below the non-working thread Y-2 , so that there is no possibility that the thread cutting device 29 cuts the threads Y-2 . By turning the needle circle 15, the thread YI is guided on the circumference of the sinker cap 31, the suction in the suction device 39 causing the thread YI to take a straight path between the suction tube 39 and the point where the thread is inserted into the needle circle 15. The F i g. 9 shows the main thread Y-3 in a central position adjacent to the suction tube 39. As soon as the needle circle 15 rotates the point of engagement beyond the central position, the end of the main thread Y-3 is brought into engagement with the downwardly directed projection 46 of the blade 44 , the main thread Y-3 extending from the cutting edge 26 of the tooth 24 under the cutting edge 44 into the suction tube 39. When the tooth 24 is moved beyond the downward projection 46, the main thread Y-3 is severed, its severed tail is removed by the suction tube 39, leaving only a very small end. Since the operation of the circular knitting machine leads to an overlap between the laid-out thread end and the inserted thread, it is not a major problem to effect an effective fastening of the severed thread ends emanating from the main system, so that the thread cutting device 28 can be arranged at any point. where the same is not effective with the threads laid in the auxiliary system, but is effective with the threads laid in and laid out on the main system 33.

According to the invention, the thread cutting device 29 for the auxiliary system 34 is next to it subsequent system arranged in such a position that the tongues 72 of the needles 15 are in are in a position so as to define the severed thread end within the hooks of the needles. For this purpose, the thread cutting device 29 is arranged adjacent to the main system 33. As in FIG. As shown in FIG. 2, the thread cutting device 29 has a flat cutting element 51 which is attached to its free outer end has a downwardly directed cutting edge 52 which is connected to the teeth 24 of the Toothed ring 23 cooperates and rests on the same. At its opposite end is that Cut-off element 51 arranged in a holder 52 a, which is formed in one piece with the same Yarn deflection device 53 has. The thread deflector 53 ensures that the Threads from the thread guides 38 pass under the cutting element 51, so that the same be severed by the engagement of the cutting edge 52 with the teeth 24.

In the operation of the thread cutting device 29, as shown in FIGS. 1 to 8, the auxiliary thread Y-4 is shown as being laid out by the thread guide 38-2. The auxiliary thread Y-5 has been added by the thread guide 38-3, and the thread Y-6 is held in the non-working position by the thread guide 38-1. As in FIG. 1, the threads Y-4 and Y-6 pass under a wire 56 and are raised above the level of the sinker cap 31 by a wire 57 (see FIG. 5), which reduces the tension on the threads and that Lifting of the threads supported by the suction tube 40. The threads then pass around guide pins 58, 59 and 60 that enter

Prevent the threads from getting tangled on dial 21. The thread Y-6 is drawn up into the suction tube 40, the auxiliary thread Y-4 continues around the dial 21, the same being guided through the pins 61, 62 and 63. Finally, the thread Y-4 is guided through the needle circle 15 and the toothed ring 23 under the cutting element 51. It should be noted that the final group of needles shown in FIGS. 1, 7 and 8 are identified by the reference numeral 15-4 , are not drawn off on the auxiliary system 34 to a certain height, so that they carry the auxiliary thread Y-4 within their open hooks which hold the main thread Y-3 on the main system 33 take up, whereby two loops are formed on the needles 15-4 , so that the transition from one to two-system knitting and vice versa, the beginning and end of the thread, which is fed to the auxiliary system on or off, is anchored in the goods.

As in FIG. 6, the cutting edge 52 of the cutting element 51 is arranged in the region of the trigger lock part 70, which pulls the needles 15 off to a certain height. The needles 15 are conventional latch needles with a hook 71 and a5 of a rotatable tongue 72. As soon as the pivot point of the tongue 72 is guided from above to below the sinker height 17, the loop previously knitted from the thread YI and located on the needles 15 lifts the Tongue 72 on so as to close the hook 71 in the usual way. As clearly shown in FIG. 8, the arrangement of the cutting edge 52 in the area of the trigger lock part 70 means that the tongue 72 is closed against the hook 71 when the thread end Y-4 is severed. As a result of this arrangement, the severed and last end of the auxiliary thread Y-4 to be knitted is caught in the needle hook 71 and knitted as an appropriate fastening. During the severing of the yarn Y-4, the suction tube 40 pulls the severed and unknitted other end of the yarn Y-4 away from the cutting element 51 and into the suction tube, where the same takes a position adjacent to the yarn Y-6 . A similar effect occurs when the auxiliary thread YS is brought into engagement with the cutting element 51 by the needle circle 15 and the toothed ring 23. The auxiliary thread YS extends at this point from the cutting element 51 around the guide pins 63, 62 and 61 into the suction tube 40. When the thread Y-5 passes the downwardly directed cutting edge 52 of the cutting element 51, it is severed and its severed end is pulled off the dial by the suction in the suction tube 40. The knitted-in end of the auxiliary thread Y-5 is, as is the case in connection with the auxiliary thread Y-4, inserted into the hook 71 of the needles 15 through the tongues 72 and then knitted. It should be noted that a first group of the needles shown in FIG. 1 is indicated by the reference numeral 15-5 , is not drawn off on the auxiliary system 34 to a certain height, so that they carry the auxiliary thread Y-5 within their open hooks and take up the main thread Y-3 on the main system 33.

The result is that the thread cutting device 29 may then continue from the trigger lock part 70 can be arranged if a device is provided which ensures that the thread cutting device 29 does not cut off the threads laid and laid out on the main system 33.

For this purpose, according to the invention, the cutting edge 51 of the cutting element 52 is in that area of the trigger lock member 70 so as to close the hooks 71 of the needles, and an exit to prevent the severed thread end from hooking. Due to the arrangement of the cutting element 52 at this point the main thread Y-3 laid in on the main system 33 follows down into the teeth 24 of the toothed ring 23 through the trigger lock part 70 immediately after the course the cutting edge 51 drawn.

If necessary, actuating levers controlled by the pattern mechanism of the circular knitting machine can be provided for lifting the blades 44 and 51 in order to release the projections 46 and 52 from engagement with the toothed ring 23 when the corresponding systems 33 and 34 are not inserting or removing the Threads takes place.

Claims (1)

Claim: Method for knitting on multi-system circular knitting machines, in which to determine the start or end of an auxiliary thread fed to an auxiliary system in the knitted fabric when this auxiliary system is switched on or off, the first or last needles, which indicate the beginning or end of the knit or laid out auxiliary thread, form the auxiliary thread only on the main system together with the main thread fed there into double-thread stitches, characterized in that the beginning and the end of the auxiliary thread (Y-4, Y-5) only on the main system (33) of the thread cutting device (29) arranged there is separated after the first (15-5) and last (15-4) needles, which knit the auxiliary (Y-5) and the main thread (Y-3) together, on the trigger cam (70) of the main system have been withdrawn so far that their tongues are closed. Considered publications:
U.S. Patent No. 2,785,553. 1 sheet of drawings 509 720ßO 10.65 © Bundesdruckerei Berlin