US2807860A - Yarn storage device for warping frames - Google Patents

Description

Oct 1957 K. BUDER ETAL 2,807,860

YARN STORAGE DEVICE FOR WARPING FRAMES Filed Sept. 11, 1955 3 Sheets-Sheet 1 Karl BudervHans EhrZ q. ATTORNEYS Oct. 1, 1957 K. BUDER ETAL 2,807,860

YARN STORAGE DEVICE FOR WARPING FRAMES Filed Sept. 11. 1953 :s Sheets-Sheet 2 Fig. 2

Karl Buder hans Ehrl" ATTORNEKS Oct. 1, 1957 K. BUDER ET AL 2,807,360

YARN STORAGE DEVICE FOR WARPING FRAMES Filed Sept. 11, 1953 3 Sheets-Sheet 3 United States Patent T 2,807,860 YARN STORAGE DEVICE FOR WARPING FRAMES Karl Butler and Hans Ehrl, Augsburg, Germany, assignors to J. Sailer K. G., Augsburg, Germany, a corporation of Germany Application September 11, 1953, Serial No. 379,650

Claims priority, application Germany September 25, 1952 Claims. (Cl. 2832) Yarn-storage devices for warping frames are known; when a winding back of the cloth beam is necessary due to a broken thread, such devices serve to hold the group of threads being released in an arranged position and to avoid any manual contact. This becomes more necessary as the working speed is increased and the yarn to be handled is more sensitive. For this purpose, the yarn storage device must be able to accommodate a considerable length of thread. The falling rollers already proposed for this purpose are not sufiicient when in a number of one or two elements, if it is not desired to accept large dropping heights which are unsuitable for practical use. Considerable diifieulties, however, stand in the way of the employment of a larger number of falling rollers, since they stretch the threads to an excessive amount. The constant bearing of the known falling rollers is in addition deleterious to the working operation and is not 1 tenable for given requirements. Accordingly, a relatively large number of rollers has already been mounted in a frame and these have been held inoperative as regards the group of threads during the normal working operation. However, the lowering of the roller frame, which is positively initiated with initiation of the winding back of the thread, must bear quite a definite relationship to the rearward rotation of the cloth beam, in order on the one hand not to permit any derangement to occur in the group of threads, but also on the other hand in order not to permit the occurrence of any overstressing in the threads. To do this a complicated and expensive control mechanism is necessary.

In contrast thereto, the invention is characterised by a device of the greatest possible simplicity in construction, yet one which nevertheless is absolutely reliable in operation. It is concerned with a yarn storage device having falling rollers, and comprises a liftable roller-securing frame, of which the roller-securing device is adapted to be controlled beneath the plane of the threads from the dropping path, preferably by lateral displacement relatively to the rollers, for example, by means of running up on a fixed inclined guideway. In this manner, the falling rollers can be set in operation or rendered inoperative by the simplest possible means.

The positioning of a relatively large number of such falling rollers on the group of threads would permit the setting up of a tensile stress if the group of threads is in an absolutely rectilinearly stressed position, owing to the weight-loading thereof, and this could be untenable. In order to counteract this, it is proposed in a further development of the invention to provide an initial storage device, such as a spring-loaded pivoted guard, which before clamping the group ofthreads between the falling rollers and the winding supply, extracts a thread reserve from the latter, and the loading thereof determines the thread tension in the storage device after the clamping. The thread reserve stored in this initial storage device is immediately available when the falling rollers are bearing freely on the group of threads, and does not permit the thread tension to increase beyond the tension deter- 2. mined by the loading of the initial storage device. The spring-loaded pivoted guard in addition maintains the smoothly arranged thread in position under tension immediately after the falling rollers are lifted again.

The engagement and disengagement of the initial storage device is, moreover, according to the invention, coupled with the action of the clamping, by the fact that the toothed wheel effecting the clamping has pivoted thereto a link arm for the rocking guard of the initial storage device, of which the pivot point for the rocking guard contains a recess for the free movement thereof. The end of the recess corresponding to the highest position of the rocking guard is provided with a stop notch for a fixed pivoted guard coupling so as to disengage the pivoted guard before the release of the clamping action.

Further details of the invention are to be seen from the drawing illustrating one constructional example, wherein:

Figurel is a side elevational view of the device of the instant invention,

Figure 2 is a plan view thereof,

Figure 3 is an enlarged sectional view of a portion of th device shown in Figure 2,.when taken along lines 33 thereof.

The details and the functional co-operation thereof will be most easily understood by setting out the timing sequence of one working process: By swinging the hand lever 1 in a clockwise direction (Figure 2), the shaft 2 and the toothed wheel 3 mounted thereon (Figure 3) are rocked. The rack 4 meshing with the toothed wheel 3 is moved downwardly and thus the clamping member 5 provided with a rubber covering 8 is moved in a direction towards the fixed counter-clamping rail 7 with its rubber covering 8. At the same time, the link 10 pivoted at 9 to the toothed Wheel 3 is rocked upwardly from a position to be imagined as being lower than that shown, so that the arms 11 and 13 of the clamping guard will pivot about the fixed shaft 12 and rock the rod 14 attached to arm 13 into the group of threads 6, the rod 14 obtaining a thread reserve moving from the thread supply to the left or in the direction 16 as viewed in Figure 3. The arm 11 is at this time under the tension of the spring 15 with a pin 17 on the upper end stop of the recess 18 of the link 10. At the end of these movements, the clamping guard 5 rests on the counter-clamping rail 7 and holds the group of threads clamped towards the side 16. This condition is shown in Figure 3.

The hand lever 19 visible in Figures 1 and 2 is now rocked and thus the rack 23 meshing with a toothed seg ment 22 is drawn downwardly by toothed segment 20, the toothed wheel 21 meshing therewith and the said toothed segment 22 in turn being rigidly connected to the said wheel 21. Fixed at the upper end of the rack 23 is a frame which is movable upwardly and downwardly in two vertical guideways 24. The frame consists of two transverse girders 26 which are rigidly interconnected by three vertical straps 25. Two arms acting as lower chords 27 are fixed to the lower girder and two arms acting as upper chords 27' are fixed to the upper transverse girder. These arms extend fromthe side of the machine containing the rack 23 across the group of threads to the operating side of the machine with its hand levers 1 and 19. This cantilever frame 2527 carries on each side a rail 28 slidably secured thereto and provided with upwardly open bearing lugs 29 for accommodating pins or journals 30 of falling rollers 31, it being assumed that there are five such rollers in the example. Accordingly, in the upper position of the frame 2527, which is shown in broken lines in Figure 1, these falling rollers are disposed above and out of engagement with the group of threads 6. If the frame is lowered by suit-able pivoting of the hand lever 19, the falling rollers all bear on the group of threads. The frame is lowered further, so that the hearing lugs 29 move completely from the pins 30, whereupon the rails 28 strike with their right ends against the fixed inclined guides 32, at which they are shifted laterally relatively to the dropping rollers 31, which is rendered possible by their being mounted in the frame 25-27 for movement in the corresponding direction. The lateral displacement is effected rectilinearly to such an extent that the bearing lugs 29 remain located between each two journals 30 of the falling rollers 31. The falling rollers can consequently now drop downwardly when the separating beam is turned back, as is shown in Figure l for the two left-hand ones, while the centre one is suspended at about half the dropping height, if the sequence of the dropping is so predetermined by slight differences in weight in the rollers. The falling rollers are in this movement guided between guide rails 33.

At the instant that the bearing lugs 29 are swung out beneath the journals 30 of the falling rollers 31, the said rollers bear with their full weight on the group of threads 6. This produces a component of tensile force of infinite value on the thread group which is fully tensioned rectilinearly, so that the pivoted guard 14 of the initial storage device is lifted and delivers its thread reserve, which permits an immediate sagging of the thread group at the supporting positions of the falling rollers, so that the thread tension is now determined by the force of the spring 15 of the rocking guard of the initial storage device. If the separating beam is rotated forward again after knotting of the broken thread has been carried out and the stored group of threads is wound again until the falling rollers are all disposed at the top on the group of threads again, and if the frame 25-27 is moved upwardly again, the rails 28 are displaced laterally back- Wards again under the force of springs (not shown) on the inclined guide 32 until the bearing lugs 29 are again exactly disposed beneath the journals 30 of the falling rollers 31 and carry the latter upwardly therewith upon being further lifted. At the instant of the lifting movement, the rocking guard 14 of the initial storage device again takes up the thread reserve which is being formed, so that the thread group remains in a completely flat arrangement.

Thereupon, the separating beam is rotated lightly and carefully in the forward direction, the rocking guard 14 of the initial storage device being lifted until the thread group lies entirely straight. In this top position, the pin 17 of the second arm 11 of the rocking guard 14, which pin could move freely in the recess 18 during the free working of the rocking guard, reaches that stop notch 34 in the link 10 which is disposed at the other end of the recess 18, the said link being locked in this position under the force of a spring 35. During the working of the falling rollers, this locking action preventing the free mobility of the rocking guard 14 of the initial storage device was prevented by the fact that an adjustable stop 36 (Figure 3) disposed on the frame 25-27 so limited the swinging range of the rocking guard 14 that the latter could not reach its highest possible position. However, if now the pin 17 is latched in the stop notch 34 in continuation of the movement under consideration, the rocking guard is immediately lifted from the group of threads with subsequent backward swinging of the hand lever 1 in a counter-clockwise direction and before the opening of the clamp 57, so that thereafter the clamping means may also be released. During the continued movement of the hand lever 1 which is necessary for this purpose and thus of the toothed wheel 3 in a counter-clockwise direction from the position shown in Figure 3, the stop 37 abuts against the link 10 and thus releases the recess 34 from the pin 17 against the force of the spring 35, so that the rocking guard 14 is again brought to the ready" position under the force of the spring 15, in which position it remains held by the bearing of the pin 17 on the top and stop of the recess 18.

What we claim is:

1. In a yarn storage device for warping frames, a main frame provided with a vertically movable section, said section including a portion for loosely supporting falling rollers against a group of threads, said last mentioned section having an element slidable with respect to the frame section, upwardly open bearing lugs on said element for supporting the journals on opposite ends of thread engaging falling rollers, inclined guide means on said frame disposed below one end of said slidable element, and means for moving the frame section vertically and in a downward direction, whereby the slidable element will contact said inclined guide means and be moved in a direction transverse to the normal downward direction of said frame section whereby the said journal lugs will be displaced to one side of and out of engagement with said falling rollers so that said falling rollers supported only by said group of threads will also fall downwardly drawing said group of threads with them, and guide means for controlling the downward movement of said falling rollers.

2. A device as set forth in claim l, wherein the vertically movable section of the frame is provided with a stroke limiting means.

3. A device as set forth in claim 1, wherein said main frame is further provided with an initial storage portion. said storage portion comprising a pivoted rod, spring means urging said rod downwardly, whereby said rod before the clamping of the group of threads between the falling rollers and a spool supply, will extract a thread reserve from the latter with the spring means in turn acting on the rod so as to maintain proper thread tension in the storage device after the clamping action.

4. A device as set forth in claim 3, wherein the engagement and disengagement of the initial storage device is coupled with the clamping operation by the following means, a toothed wheel and cooperating rack for effecting said clamping action, a link pivoted on said wheel, said link having a slot therein adjacent the free end thereof with said slot in turn being provided with a lateral notch at one end thereof, said rod being supported on one end of an arm, and said arm being pivoted intermediate its ends on a fixed pivot member, the other end of said arm being provided with a pin movable in said slot and receivable within said notch, when said rod is in its topmost position.

5. A device as set forth in claim 4, further characterized in that the rod of the initial storage device is released from said notch. by a member projecting laterally of said toothed wheel, said member being disposed for movement in a circumferential path whereby upon rotation of said wheel said member engages said link outwardly of its pivotal connection and displaces said link with a resulting movement of said notch away from said pin.

References Cited in the file of this patent UNITED STATES PATENTS

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