DE2027571A1 - Yarn laying in multiple-head flat bed - knitting machines - Google Patents

Abstract

Yarn guide system comprises at least one reciprocation linkage which bears at least one thread guide for each knitting head. Adjustable stops limit the reciprocation of each guide. Each guide has a box which carries a thread guide and is slidably mounted on the linkage. A drive is fixed to the linkage. A centering or added-load means is between the box and the drive. In operation, the linkage can reciprocate over a distance slightly exceeding the end position determined by the stops.

Description

DR. MÖLLER-BORE DIPL-PHYS. DR. MANITZ 2027571

DlPL-CHEM. DR. DEUFBL DIPL-ING. FINSTERWALD DIPL-ING. GRÄMKOW

PATENT LAWYERS

June 4, 1970 Ho / ck - S 2158

S.A. ' Monk (Sutton in Ashfield) Limited

Mansfield Road,
Sutton in Ashfield, Nottinghamshire, England

Yarn carrier systems
for knitting machines.

The invention relates to knitting machines with straight bar knitting machine and is particularly focused on an improved device for Laying the yarn directed over the knitting elements, especially in connection with multi-head machines.

In multi-head knitting machines with straight crossbeams, the yarn carriers are fixedly arranged on a carrier rod, which extends in the longitudinal direction of the machine. Typically a plurality of such rods is provided, each Rod has several yarn carriers. Every thread carrier is assigned to a knitting head and takes relative to this the

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same position. Usually the support rod is moved back and forth in the longitudinal direction of the knitting head, and means are provided for their movement and thus the movement of the yarn carriers precisely in those Stop end positions that correspond to the edges of the garment to be manufactured.

One way to achieve this precise end-of-travel alignment is with the chain drive mechanism for the carrier as described in our copending application No. Ij5 911/68. Although this method is satisfactory, it is costly. In addition, it has the disadvantage that wear occurring in the mechanism ^{causes conditions 1} in which the masses moving in the transverse direction overtake their drive and deceleration forces, that is, in which there is oversteering. This then leads to so-called "slamming" when the support rod reaches its end position as defined by the edge screws.

Another possibility is to drive the support rod via a slide box that slips through, when the support bar hits the edge stops. Such attacks are on the nut housings for Edge or shaping screw provided. This method has the disadvantage that considerable Forces would have to be consumed and that the above-mentioned conditions for "popping" seriously affect the speed of operation of the device.

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It is also known to attach each yarn carrier to a very light box that is slidably seated on the carrier rod. The back and forth movement is given to it by means of friction pads. In this case, above each active head edge stops arranged at the edge or Fassonierungsschrauben _s and each is under frictional Tragbox strikes their separate right and left edge stops at "This approach has the advantage over the method described above, that the conditions for the" bangs "can be reduced considerably, since the mass of the yarn carrier box is significantly reduced". However, a disadvantage of this method is that pawls must be provided in order to hold each box in its outermost edge position and to enable widening to take place.

It should be noted that the lateral movement is great Masses themselves do not cause problems in the design and operation of yarn laying devices. However there are problems in achieving precisely defined end positions of the yarn carriers, especially when they are high Speeds is worked. The invention is therefore directed, inter alia, to creating a yarn laying system, which obviates or substantially eliminates these problems and the disadvantages of the above-mentioned known methods reduced.

According to the invention, a yarn carrier system for multi-head knitting machines with a straight cross member is created, consisting of at least ⁿ ßin and forth going support rod for holding at least one yarn carrier for each knitting head and adjustable stops for

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Limitation of the back and forth movement of the yarn carriers. ,, where each yarn carrier is provided with a centralization or override device that of the support rod limited exceedance is permitted in their transverse movement. This eliminates the need to precisely achieve the end position for all heavy moving masses, such as the support rods and. represent the yarn carriers.

Preferably the centralization or override device is designed as a compression spring, which between a part of the fixedly arranged on the support rod Carrying box and a part of the carrying box that is slidably seated on the carrying rod.

The invention thus creates very light yarn carriers, have the yarn guides and sit on a relatively heavy support rod moving back and forth »The support rod is accelerated from its rest position attached to the edge and in the other edge position up to Braked to a standstill. The yarn carriers are arranged and designed so that they have a relative movement between allow the twine guides and the support rod so that the possibility - but not the necessity consists that the support rod a slight movement beyond the desired end position of the yarn guides passes through.

On the accompanying drawing, an embodiment of the device according to the invention is for example shown. Show it:

1 shows a cross section through part of a knitting machine with straight crossbeam, whereby the relative

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Positions of a Mehrzhal of yarn carriers are shown; .

FIG. 2 is a view in the direction of arrow 2 according to FIG. 1, only the parts being shown which are needed for a clear understanding of the invention;

FIG. 5 shows a front view on an enlarged scale a yarn carrier according to the invention;

Fig. 4 is a section along the line 4-4 of Fig.

As can be seen in particular from FIG. 1, a knitting machine with a straight cross member comprises a plurality of carrying boxes 1 with guides 2 for the yarn.

In the figures certain parts of the main frame of the machine are shown. All of these parts carry that Reference symbol F.

The yarn guides 2 are arranged to cooperate with a series of needles j5. The needles sit on a needle bar 4 and can execute limited angular movements. With the needles j5 work in plates 5 arranged in a row in a known manner (sinkers) together, which in guides (tricks) of a sinker bed 6 (sinker bed) slide. The sinkers 5 are actuated by a finishing element 7 (slurcock) via a pawl 8, which is biased by a spring 9 into its rest position will. In addition, a number of knock-over bits are provided, which are held by a knock-over rod. (11) to be worn. They serve to

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to cooperate with the needles 3 if known.

From Fig. 3 it can be seen that the carrier boxes 1 for the Each thread sits on a support rod 12. The support rods 12 extend lengthwise over a knitting compartment KB into a control compartment CB of the machine, where they are connected to drive means, not shown. These are used in a known manner to create a longitudinal, cause reciprocating movement of the support rods and thus the support boxes with the yarn guides 2 relative to the needles 3 to move back and forth. In this context, it should be noted that the support rods 12 can be any desired Number of active compartments -KB can extend, each having a carrier box 1 for each active compartment.

Each carrying box 1 consists of a base element 13 with two support plates 15 which are arranged at a distance from one another and which are fastened by means of screws 14. The basic element and the support plates can slide relative to the support rod 12. Between the support plates 15, the base element 13 is provided with a downwardly protruding shoulder 16, to which the yarn guide 2 is attached by means of screws 17. There is also a yarn feed pipe 18 provided to cooperate with the guide 2 and avoid tangling or entangling of the yarn.

The support plates I5 are provided with shoulders I9, which receive opposite ends of a spindle 2o, the spindle 2o has threaded pieces at its ends, wherein each end is provided with a fastening nut 21 and a stop 22 for relative adjustment

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to allow the carrying box. There are two on spindle 2o Slidable, spaced apart sleeves 23 are provided, each with one end on the lugs 19 abut, while their other ends carry transverse projections 24. A spring 25 is also seated on the spindle 2o. It is arranged so that it is supported on the other mentioned ends of the sleeve 23, to brace this against the approaches I9. The from the spring 25 exerted force is preferably in the Of the order of 0.5 kg.

A drive arm 2β with two spaced apart Lugs or projections 27 is fastened to the support rod 12 by means of screws 28. Its location is chosen so that the lugs or projections 27 each bear against the projections 24 of the sleeves 23. Thus results that the carrying box, unless it is subject to other influences, is in a central position relative to the the support rod 12 attached drive arm 2ό held will. ·

Two stop mechanisms 29 and 29a are in the or each knitting shed provided in order to determine the stroke length of the or each carrying box 1 for the yarn. Any stop mechanism includes a block 30 and a stop bar 31, which slide in an opening in the block can. One end of the block 30 is fixedly connected by a screw to an adjustment shaft 33, which is extends along the machine. The other end of the block 30 has a fork into which a stationary one Guide rod 34 engages. This guide rod extends in the longitudinal direction of the machine between the main frame parts F.

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To the location of the Anschiagmeehanismus 29 accordingly To adjust the required width of the knitted fabric to be produced, the adjusting shaft 33 extends into the control compartment CB, where it is attached to a nut housing 35. The nut housing sits on a shaping screw 36. Around the nut housing 35 to move along the screw 36 and on this Way at the same time to adjust the position of the Anschiagmeehanismus 29, the screw is in a known manner operated via locking mechanisms 37 and 38, which are operated by pawls 39 and 4o are driven. The latch and locking arrangement 37 * 39 turns the screw 36 in one Direction, while the drive of the screw in the other direction via the ratchet and locking arrangement 38, 4o takes place. The pawls are in a well-known manner Operated via a linkage system from the main camshaft of the machine.

It should be noted that the stop mechanism is fixed in the same manner and with similar means as the stopper mechanism 29 and 29a set apart from the fact that the running direction of the screw to that of the Passonierungsschraube entgegengerich- 36) is Tet. The stop mechanisms move in opposite directions! Directions. It should also be noted that the nut housing and the Forming screws are part of a mechanism normally used in fully fashioned straight bar knitting machines (fully fashioned straight bar knitting machines) to control the width and the Forming mechanisms in your position to adjust. In the present case, the stops 29 and 29a are also controlled.

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In FIGS. 1 and 2, the stop rod j51 assumes a position in which it controls the stroke length of a single yarn carrier 1. However, in order to be able to control more than one yarn carrier, the stop rod 31 is designed to be adjustable. For this purpose, it has two upright prongs 41 at its free end, into which a shaft 42 engages in a displaceable manner. The shaft extends in the longitudinal direction over the knitting compartment. The shaft 42 is firmly connected via brackets 4-3 and 44 to an actuating shaft 45 which protrudes into the control compartment CB, where it is fastened to a lever 46. An actuating rod 47 is pivotably seated on the lever 46 and is driven in the vertical direction via the main camshaft of the machine or by this in order to rotate the levers 43, 44 and in this way cause a relative movement between the stop rod 31 and the block 3o. The vertical movement of the actuating rod 47, that is to say the extent of the movement of the stop rod 31 t , is controlled in such a way that an interaction with one or more yarn carriers 1 takes place according to the requirements.

If the stop rod 31 is adjusted during operation and the stop mechanisms 29 and 29a are aligned along their length, the means for moving the yarn carriers are operated in the normal manner. If, as can be seen from Fig. 2, the carrier box for yarn with its yarn guide 2 touches the associated stop rod 3I and comes to a standstill, the drive arm 26 and thus the support rod 12 can move a certain distance against the action of the spring 25 over the Move the stop rod 3 ^{1 out.} It should be noted that the arrangement in this way enables a precise definition of the carrier box 1 with the yarn guide 2 in

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their end position causes. At the same time, the heavy displacement mechanism the possibility of over being driven out the width of the garment. The excess kinetic energy can thus comfortably Wise to be destroyed without the exact laying of the plague would be touched in the end position.

Another advantage of the arrangement according to the invention is that the carrier box 1 when it is in a stationary position near the edge of the garment, in this position by the force of the P compression spring is held. This is not necessary the need to arrange pawls that are normally required for this purpose.

That being said, in the manufacture of garment extensions known as widening-in-the-course, the stop mechanisms 29 and 29a are moved outward a distance corresponding to one needle pitch by turning the edge screws, then simultaneously the yarn carriers with the stop mechanisms migrate outwards. In this operation, the simultaneous movement of the yarn carrier is normally obtained with f the stopper mechanisms on the above-mentioned latches that hold the support boxes in their positions adjacent to the stopper mechanisms. In the present arrangement, however, the compression spring 25 of the yarn carriers is able to exert sufficient force to cause the yarn carrier box to follow the movement of the associated stop mechanism.

The yarn carrier arrangement according to the present EvQa training can be used in connection with any yarn laying

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system can be used. However, it is particularly advantageously applied to the finishing mechanism (slur draw mechanism), which is the subject of the co-pending patent application Ij5 911/68 of the applicant forms. The present device replaces the chain hoist arrangement in a cheap and simple manner for the porters.

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Claims (6)

Claims Π. J Yarn carrier system for fully formed multi-head knitting machines with straight cross member (multi-head fully fashioned straight bar knitting machine), consisting of of at least one reciprocating support rod for holding at least one yarn carrier for each knitting head and adjustable stops for limiting the to and fro movement of each yarn carrier, characterized in that each yarn carrier (Γ) for Holder of a yarn guide (2) has a carrier box which is slidable on its associated carrier rod (12) sits that a drive arm (26) is fixedly arranged on the support rod (12) and that a centralization or Override device (25) is arranged between the support box and the drive arm, such that the support rod (12) has a limited transverse movement during operation that end position of the carrying box can also carry out which is determined by the attacks. 2. System according to claim 1, characterized in that the centralization or override device has a compression spring (25) which moves the carrying box (1) into a central position relative to the drive arm (26) pretensioned. - 12 - 009852/1535 3. System according to claim 2, characterized in that each yarn carrier (1) has a carrying box with two projections (19) arranged at a distance from one another for receiving a spindle carrying the compression spring (25) (2o) and between each end of the compression spring (25) and the associated extension (19) of the carrying box one on the spindle (2o) sliding sleeve (23), wherein the end of each sleeve (23) carries a projection (24) which on a associated projection or shoulder (27) of the drive arm (26) comes to rest. 4. System according to one of claims 1 to 3 * thereby characterized in that the stop device (29, 29a) comprise a pair of stop rods (3I) which are each arranged in a wire block (30), wherein the support blocks (30) are adjustably attached to longitudinal movements relative to the needle bed (3) of each knitting shed. 5. System according to claim 4, characterized in that a device for implementation longitudinal movements of the support blocks (3o) in opposite directions is provided, consisting of Forming Screws (36), Nut Housings (35) and Latch mechanisms (37 to 4o) to turn the screws in opposite directions Directions to rotate. 6. System according to claim 4 or 5 *, characterized in that each knitting subject has a plurality of yarn carriers (1), each stop rod (31) being adjustable relative to the associated support block (30) is. - 13 009852/1535 7. System according to claim 6, characterized in that the support blocks (3o) are pivotably connected to a shaft (42) which extends in the longitudinal direction of the machine and, for example, via levers 4] 5 arranged at a distance from one another to a shaft (42) parallel to the first Shaft (42) arranged actuating shaft (45) is connected, wherein means (46, 47) are provided to rotate the actuating shaft (45) and thus to give the stop rods (31) a sliding movement in their m associated support blocks (j5o) . - 14 - 009852/1535