DE2003760C3 - Thread feeder with a thread buffer for thread-consuming textile machines - Google Patents

Description

9 thread feeder according to claims, characterized Indicates that the thread eyelet support arm has a thread inlet eyelet on its fixed part (28, 55 ") (17, 22).

Thread feeder according to claim 8, characterized in that a thread sensor (54) assigned to the thread outlet eyelet (48) is arranged on the pivotable arm part (49), which is coupled to a means (58) which changes the speed of the drive source and to which, if necessary, an adjusting device (Sl) is assigned for the thread tension.

11 thread feeder according to claim 1, characterized characterized in that the fork body (6) extends on one through the threaded body (2, 25, 46) and in this rotatably mounted shaft (5, 37 62) is non-rotatably arranged and this with the Coupling (11,13, 33, 34) is connected.

V thread feeder according to claim 11, characterized in that the clutch is a friction clutch consisting of a clutch disc (11, 33) and a coaxially associated clutch plate (13, 34) which is pretensioned towards the engaged position by a compression spring (9, 35) is.

13 thread feeder according to claim 11, characterized in that the shaft (62) with a pinion (63) is coupled which is driven by a synchronous with the machine drive Toothed belt (53) is in engagement.

14 thread feeder according to claim 11, characterized in that the drive source is a inserted into the hollow threaded body (25)! Electric motor (24) is.

15 thread feeder according to claim 12, characterized in that the friction clutch with the associated compression spring (35) as a unit by means of a collar (31) in the threaded body (25) is removably arranged.

16. Thread feeder according to one of the preceding claims, characterized in that £ actuated on the threaded body (25) as a function of the rotation of the fork body (6) Contact means (65, 67) are arranged through which an electrical counter (70) can be controlled.

17. Thread feeder according to one of the preceding claims, characterized in that the fork body (6) is coupled to a reverse lock (71).

The invention relates to one. Thread feeder with a thread buffer for thread consumption chende textile machines with a pulling the thread from a bobbin, several times from the zi supplying thread entwined, rotating thread delivery element, which is controlled via a controllable coupling can be coupled with a drive source if necessary.

In a thread feeder of this type known from French patent specification 1 570 969, the rotating thread feed element consists of a substantially cylindrical drum which carries a number of thread windings forming the intermediate thread store and from which the running thread can be withdrawn either upside down or tangentially. In one embodiment, the thread drum is assigned a thread eyelet support arm, which is pivotably mounted between two positions and which is optionally in the one position in which the thread outlet eyelet is aligned axially parallel to the thread drum and can be fixed in the second position approximately at right angles to the first position which the Ac ^Kc e of the thread outlet eyelet runs approximately at right angles to the axis of rotation of the thread drum.

In the case of a thread feeder with a basically similar structure, the one in the Swiss patent 482 042, the thread drum is driven through a hollow thread drum used electric motor, one part of which sits non-rotatably on a central shaft and the other other rotating part is connected to the thread drum.

In these known thread feeders, the stored thread turns are fed in Axial direction of the thread drum through a swash plate with fingers arranged on its circumference engages through corresponding recesses in the thread drum wall and the top one Presses the thread winding downwards. The swash plate overcomes with an increasing number of the windings wound on the thread drum the force of a spring holding it in the inclined position, which is used to control the coupling connecting the thread drum to a drive source will. In another embodiment, this clutch and thus the size of the is controlled Thread supply on the thread drum through its own, for example pneumatic, scanning device.

Based on this prior art, the invention is based on the object of a thread feeder to create of the type mentioned, which is due to a significantly simplified structure high operational reliability.

To solve this problem, the thread feeder according to the invention is characterized in that the delivery element is a coaxial with a fixed threaded body with formed on the outer peripheral surface Thread turns rotatably mounted fork body with at least two at least over part of the axial length of the threaded body and extending on a circular path around the threaded body movable fork prongs is on which the spaced apart on the fork prongs Thread turns that engage in the threads of the thread body, in cooperation are axially displaceable with the threaded body and its coupling to the drive source by a Axial movement of the fork body can be engaged and disengaged by being on the back of the fork prongs thread turns held by friction in cooperation with the threads of the thread body can be generated.

The new thread feeder does not have its own pneumatic ones that monitor the size of the thread supply or photoelectric scanners are required. It also eliminates all in their mechanical Structure and in their storage relatively complicated feed elements for the aut the thread delivery element applied side by side Thread turns, because the thread feed simply interacts with the thread body happens automatically.

Further advantageous features of the new thread feeder are the subject of the subclaims.

ίο In the drawing is an embodiment of the Subject of the invention shown. It shows

F i g. 1 shows a thread feeder according to the invention in a first embodiment, in a side view,

F i g. 2 the thread feeder according to FIG. 1, cut along the line I-I of Fig. 1 in plan view, Fig. 3 to 5 the thread feeder according to Fig. 1 in three different operating states, each in a side view,

F i g. 6 and 7 a thread feeder according to the invention in a second embodiment, in perspective Representation, partially cut open,

F i g. 8, 9, 10 the thread feeder according to FIGS. 6th and 7 in three different operating states,

as each in a perspective view,

F i g. 11 shows a thread feeder according to the invention in a third embodiment, in a perspective view,

F i g. 12 a thread feeder according to the invention

Training in a fourth embodiment, in a perspective view, partially cut open and

13 shows the basic electrical circuit diagram of the counter circuit of the thread feeder according to FIG. 12th
On a support 1 of the machine is an elongated,

essentially cylindrical threaded body 2 attached, through which a drive shaft 5 guided in bearings 3, 4 runs. Sitting on the drive shaft 5 non-rotatably provided with a bullet-shaped tip 61 fork body 6, which is parallel to

Shaft S extending fork prongs 7,8. The shaft 5 is mounted in such a way that, in addition to the rotational movement also execute a slight axial movement against the restoring force of a compression spring 9 can. The compression spring 9 is supported on the one hand against the stationary threaded body 2 and on the other hand Via an axial bearing 10 against a clutch disc 11, which is non-rotatably connected to the shaft 5 is. From a drive that is operated by a separate motor as well as by a collective

Drive can be formed, only the shaft 12 and a clutch plate 13 seated thereon are shown. If the clutch disc 11 is non-positively coupled to the clutch plate 13, the Rotate the fork body 6 over the shaft 5

puts. In the bullet-shaped tip 61 of the gift body 6 is an annular groove 14 with a rectangular Cross-sectional shape provided in which a flat ring 15 with rounded edges and polished surface is used. The surfaces of the annular groove 14 and

their edges are also polished. The task of the flat ring 15 is to slightly block the thread running off calm down and prevent the thread from being thrown off under the action of centrifugal force.

For holding a thread inlet eyelet 17 and one

Yarn outlet eyelet 18 is provided a thread eyelet support arm 55 which is attached to the carrier 1 and which has a joint 56 approximately in the region of the middle which allows the lower arm part 55 ^{2 to be} connected to the thread outlet eyelet

18 built-in either in a vertical or a horizontal 25. For attachment to a not shown right To transfer position and to fix there what th carrier of the machine is used with the thread individual will be explained. body 25 firmly connected; Flange 26 through which

The mode of operation is as iVigt: The thread 16 (FIG. 1) 5 runs from a non-electrical supply line 27 for the electric motor 24 shown. The outer circumferential surface of the thread through the thread inlet eye 17, then around the Ga threaded body 25, carries the threads 22, wähbelkörper 6 around and at the level of the annular groove 14 rend a holder 28 for the thread guide with a between the flat ring 15 and the surface of the thread inlet eye 29 is provided. In the part of the tip 61, whereupon it passes through the eyelet 18 facing the thread drive shaft 30 of the electric motor 24. When threading the \ o is of the threaded body 25 is a flange sleeve 31 with fork body 6 first one to two times by hand an axially aligned sleeve portion 32 arranged rotated so that the thread windings 19 are formed. Here, the torque is transmitted in this area, the clutch disc 11 can change the clutch position to the fork body 6 via a slipping clutch provided here 13 and the drive, for example a motor.

turn along. If the drive is then switched on, 15 The principle of operation corresponds to that in this way new thread windings 19 are continuously formed, which are the ones shown in FIGS. 1-5 Thread turns 22 to be kept apart form:

the, which sits on the peripheral surface of the pin-like on the drive shaft 30 rotatably a

between the fork prongs 7, 8 there is a thread — a continuously revolving coupling plate 34, to which a body 2 is formed and to which the thread windings ao coupling disk 33 are assigned, which lead through gene 19 to the tip 61 of the fork body 6. the compressive force of a compression spring 35 via a ball-Here it is assumed that the arm part 55 ² in the bearing 36 with the clutch plate 34 in FIG. 1 shown in solid lines can be coupled. When the clutch plate is in a vertical position. 34 and the clutch disc 33 in engagement, so becomes

From the in F i g. 2 shown cross-sectional representation by frictional engagement in the ball bearing 36 and in ment of the fork body 6 with the fork prongs 7,8 is a plain bearing 44 mounted drive shaft 37 in it can be seen that the turns 19 offset the tensioned rotation, which is via a molded part 38 and Thread 16 in the area of the edges 21 of the fork tine - a hexagon nut 39 with the fork body 6 ken 7,8 experience a strong kink. For this is rotatably connected, so that this with the AnGrund the thread is carried along without slipping. 30 drive shaft 37 rotates. The clutch described When the fork body 6 is rotated about the still- as an easily removable assembly in the collar-like peg-like threaded body 2 are inserted sleeve 31, in which an inserted bushing 40 the thread windings protruding into the thread turns 22 hold the outer ring of the ball bearing 36 in place. the gen 19, which in the figurative sense is a »threaded nut bushing 40 by a pin (not shown) ter «form, on the rotating fork back, 35 held non-rotatably; however, it can because of this in the direction of rotation indicated by an arrow, pin engages in a longitudinal groove of the sleeve, one for promoted to the tip 61 (Fig. 3). With increasing coupling process required small Axialbewemender However, the number of windings also increases with the excitation. To dismantle the coupling can Exercise resistance of the tightly stretched threads on the whole collar sleeve 31 after loosening one in one The back of the fork tine so that it corresponds to the one shown in FIG. 4 represent- ♦ <> Annular notch 42 of the collar sleeve 31 comes into engagement Magestellen state. the screw 41 can be removed. The MA-

The winding arcs increasingly remain on the screw 41, in one position of the fork body, is preferably wider at its root. 6 through a hole 43 for a screw fork back, while the one in the puller is accessible. From the in F i g. 7 illustrative high-speed turns 22 engaging winding areas in front of the external view of the thread feeder is to be roped. This creates in the thread sections that motor and coupling elements are dust-protected between the edges 21 (Fig. 2) and the protection against interference inside the thread feeder subframes of the thread windings with the threads are brought, so that a perfect permanent function 22 tensile forces, the an axial pull on the fork body is guaranteed. The fork body 6 has moreover 6 exercise. This has the consequence that over the 50 in this embodiment, too, a flat ring 15 which slides in a ring shaft 5 on the coupling disc 11 from the coupling groove 14, the function plate 13 of which is lifted, whereby the fork body is already shown on the basis of FIG 1 to 5 has been explained by 6 comes to a standstill. A pulling off of the thread in the case of a fork body with two threads "overhead" so over the bullet-shaped beveling due to the resulting non-circular tip 61 under the cross-sectional area acting as a brake (cf. FIG. 2) .uckweisi flat ring 15 through the Auslauföse 18 provides through the flat ring 15 would proceed, ht mi the original state restored, that is, the restoring to the thread flattened coming into contact * force of the spring 9, finally, comes into action, the vaulting zone 23 of the Fork body running out clutch disc 11 touches again the constantly um- (Fig. 5,7) shaped so that the through dii sen um rotating clutch disc 13, and the Aufwindervor-60 stood related irregularities found ^:? the process begins all over again (Fig. 5). be balanced.

While the F i g. 1 to 5 a thread feeder The thread run is always based on precheni

with that lying outside of the fork body 6 of the one in FIG. 1 to 5 shown! 1 execution show the instinctual source is a continuation in FIGS The feeder with organically built-in drive 65 is unnecessary. The thread outlet eyelet with its zigeordne engine shown. The holder is therefore shown in FIGS. 6 and 7 away

As a drive means, an electric motor 24 is in the let,
designed as a housing hollow threaded body With reference to FIGS. 1 to 5, the 'Virkungs

_W ith the new thread feeder below, - eat

this FdI is the arm part 55I * with <^ jFrienaus-

running eye 18 in the inF ι g. Ι ^ "" ^ '? ^^^ right position, while the thread 16 runs through the flat ring IS.

However, the yarn feeder can also be such a set that he ausschloßhch 'he ₌ h, uf, gene thread delivery ie without S [ "ic""rwu: Kun & serve. In this case, the arm is swiveled in the joint 56 to a right position and in this position it is diiFl ^ t ^

Jgg * »

Adjusting screw ^! can be influenced,

occupies while the

17 therethrough, is looped around the Gp manner Ingert already described old ^ ^ner of adjacent turns 15 "and is so then expire through at 18 'standing Fad" ^ 18 of the thread consumption point supplied. De number of yarn windings 19, ge ringer al st ^{at denl} ^ ^ 3 to 5 illustrated operating state mn

Storage effect of the thread

If in the above-Re., The Fadenzu b bringers no memory effect, the g ^ thinaß ^ FA_ denabnahme be interrupted, the J "wirdI denzubrnger bJ ^a" nth braking means also slowed down by itself. The hierb.ι ema ¹ J ™ thrust delivered Fader w.rd by ubl.ehe compensation means, e.g. resilient arms or deflection rollers, balanced for the thread _{.. Cfi; hnm!} " _Form in Figs. S to 10 is an embodiment of an inventive ^ ^n7ubrm ^ lJ ^ f; represents , which can be used both for the ™ ^ 5 effect and for the zwanpiauhg ^ and the cmc plus The windc 46 is attached to the cncm beam 45 of the maseh.nc. The holder 28 has a joint Z auU

which allows the lower end of the thread run-out to move into either the vertical position (F.g- 10) or the horizontal position (ml. o.; / -ren On the arm 49 is a "^ ^ geoidnet. Which can be adjusted by c.ncn ^ -""J™" ^V J "^ ° ^a beat 59. 60 pivotable f uhlheb.ti.4. The potentiometer 58 is. dcrar m the excitation circuit of the electric motor 24 zurr, drive the

Fork drivers 6 switched on. ^d ! ^ J ^ P ^^ J _fe . Electric motor 24 through the end of the delivery

NEN resistance value of ^r ^ ⁿ '"^ f _{Fad; n} ⁸ _{is a} ^C _1to is derbar The thread 16 passes through the F ^" eyelet 29 and winds m berc.ts manner around the two prongs ^ denwindungen 19 in the GewindeW... windckörpers engage 46th the 'running passes from egg dungsstclle by Fadenauslauföse dic 48 of the feeler lever 54 from where. Dam.t _u ^{w' rd} J sensing lever 54 in dependence of Vo ₁

SÄfs Should include the thread feeder for the thread delivery Storage effect are used, the arm part 49 in the joint 52 is illustrated in FIG Adjusted vertical position. The joint 52 is in a known manner with spring-loaded locking balls ίο equipped, which the fixation of the arm part 49 in the respective end position.

The thread 16 forming the thread turns 19 goes in this case through the flat ring 15, before it is attached to the thread via the thread outlet eyelet 48

is forwarded to the consumer, as shown in FIG. 1 to 5 has already been explained in detail. The potentiometer 58 remains inactive in this case.

In Fig. 11 is a thread feeder according to the invention Design shown in which the drive of the fork body 6 takes place by means of a toothed belt 53, which is common to several thread feeders arranged along the circumference of the machine. The thread feeder is suspended from a support arm 64 of the machine. Its constructive structure corresponds essentially that of the embodiment according to FIGS. f> to 9 with the difference that instead of the electric motor 24, the clutch plate 34 sits directly on the through shaft 62 of a toothed scribe 63, which is connected to the toothed belt 53 in the Engagement is. The toothed belt 53 ensures that the individual thread feeders run synchronously with the machine. Jc depending on whether the thread feeder is a thread delivery with storage effect or only to cause an inevitable thread delivery, the arm part 49 in the swivel joint 52 in the vertical or the horizontal position are set, which is the case for the two cases explained threadline results.

Fine other embodiment. which basically those according to F i g. 11, can be constructed in such a way that two thread feeders lying next to one another on the machine are combined by means of gear drives to form a twin gear unit with a common motor. This arrangement, which is not separately illustrated in detail, can •,. __ ^ _ j_ "j _ie j Twcifädigcr thread delivery at

«.Lines can be an advantage.

va IIci the yarn feeder invention takes the Fadenlieferune without slippage, it is possible to set dic number of Gabelkörpcrumdrehungen in relationship / u the length of the yarn supplied. This can be done in a simple manner with an electrical counter calibrated to a length measure, which receives a counting pulse as a function of the rotational movement of the fork body 6 from the thread feeder. Such a device is illustrated in Fig. I-.

In the case of the dei in its basic structure 60 embodiment according to Fig. 6 corresponding company denzufringer are sunk on the lower ground of the threaded body pcrs 25 electrical contact blades 65 ordered, to which lead wires 66 lead, dii inside the hollow threaded body 25 nacl 65 above pp are listed, where they can be accessed by corresponding open

attached, which to enable the free deflection on a small intermediate block 68 sits. With each rotation of the fork body 6, the metal contact tongue 67 bridges one between the contact blades 65 provided electrically insulating gap 69, so that the two contact blades 65 are briefly electrically connected to one another. Since the contact sheets 65 with of the resilient tongue 67 short-circuiting them via the lines 66 in the form shown in FIG. 13 can be seen Way are directly in the circuit of a power source, the contact sheet 65 comes in when a short circuit occurs electrical impulse which is fed to the counter 70 lying in series with the contact plates 65 and its forwarding is effected.

Instead of the contact blades 65, other means for generating pulses can of course also be used, for example a photocell scanner or magnetically operated proximity switches are used that have the advantage of being able to do without a sliding contact.

The counting pulses delivered by the individual thread feeders in the specified manner can be on a corresponding number of counters arranged on a common desk can be switched on, as a result of which it is possible to clearly see the thread consumption on all knitting systems of the To monitor the machine and, if deviations occur, to adjust accordingly the respective knitting locks. The readjustment of the thread consumption causing Stop parts in the rope locks can also

ίο done automatically, so that there is constant uniformity exists in all systems of the machine.

In order to avoid a return of the fork body 6, is in the embodiments according to the F i g. 3, 4, 5 a backstop 71 is provided, which in this case consists of a lamella which acts resiliently on the clutch disc 11, which with its free end edge with the peripheral surface of the clutch disc 11 in the manner of a The pawl can jam resiliently in one direction of rotation. Instead of potentiometer 58 (Fig. 10) Equivalent pneumatic, electrical or electronic actuating means can also be used, corresponding to those Sensing devices are assigned.

For this purpose 3 sheets of drawings

Claims (8)

Patent claims: 1. Thread feeder with an intermediate thread store for thread-consuming textile machines with one pulling the thread from a bobbin several times from the thread to be delivered wrapped, rotating thread delivery element that has a controllable coupling as required can be coupled to a drive source, characterized in that the delivery element one coaxial with a fixed threaded body (2, 25, 46) with on the outer peripheral surface formed threads (22) rotatably mounted fork body (6) with at least two extending over at least part of the axial length of the threaded body and fork prongs (7,8) which can be moved around on a circular path around the threaded body, on which the thread turns lying next to one another on the fork prongs (7,8) at a distance ne- ao, which in the threads (22) of the threaded body (2, 25, 46) engage, in cooperation with the The threaded body is axially displaceable and its coupling (11, 13, 33, 34) with the drive as source (12, 24) can be engaged and disengaged by an axial movement of the fork body (6), which by on the back of the fork prongs (7,8) frictionally held thread turns (19) in the Cooperation with the threads (22) of the threaded body (2, 25, 46) can be generated. 2. A thread feeder according to claim 1, characterized in that the fork body (6) is under the action of a pretensioning force (compression spring 9, 35) directed against the force exerted on it by the thread turns. 3. thread feeder according to claim 1 or 2, characterized in that the tip (61) of the Fork body (6) has a substantially bullet-shaped shape with a flattened arching zone (23) in the areas between the fork prongs (7,8). 4. thread feeder according to any one of claims 1 to 3, characterized in that the Fork tines (7, 8) in the region of their outer circumferential surface are sharp and run in the longitudinal direction Have edges (21, Fi g. 2). 5. thread feeder according to one of the preceding claims, characterized in that the fork prongs (7, 8) have a cross-sectional shape that widens as they approach their roots exhibit. 6. thread feeder according to claim 3, characterized in that the fork body (6) in the area the bullet-shaped tip (61) has an open-edged annular groove (14) into which a the continuous thread (16) decelerates and against the centrifugal effect occurring holding flat ring (15) is inserted floating. 7. thread feeder according to one of the preceding claims, characterized in that the thread can be pulled off either axially or tangentially from the fork body (6). 8. thread feeder according to claim 7, characterized in that the thread guide device consists of a fixedly anchored, at a distance from the fork body (6) over the length of the fork body (6) extending thread eye support arm (28, 49 * 55), which is a pivoted articulated * the thread outlet eyelet (18, 48) carrying arm part (49, 55 ² ), which optionally in a position running approximately parallel to the axis of the threaded body (2, 25, 46) or in a position approximately at right angles thereto.