JPH0753553B2 - Yarn feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn feeding device as described in the superordinate concept of claim 1.

In a known yarn feeder of this type (see Swiss Patent Publication 641119), the upstanding surface (chest surface) of the thread groove is formed by individual spindles, each of which has two polygons. Within the interstitial space between the rods, the bottom of the thread groove is provided to participate in the formation of the polygon. The yarn to be fed is thus carried on the one hand by the polygonal rod and on the other hand by the bottom of the respective thread groove and is turned into the corners of the polygon. With such a configuration, it is impossible to use the yarn supplying device at a high speed for the purpose of threading the yarn supplying device, for example, through a weft heddle of a loom. Because the perimeter of the second part to which the bobbin is delivered is determined by the first part, i.e. the groove bend, made by the groove bottom for which the bobbin is ready to be picked up. Because it is shorter than the perimeter of the first portion which is forcibly added to the perimeter formed by each of the. In each case of a significant difference in the perimeter of the first part with respect to the perimeter of the second part, the second part of the bobbin retains the arrangement formed in the bobbin from the first part. It is not possible to pass over a section where it is transferred from the rear to the front. This is known from yarn feeders for weft yarns or similar yarns (DE 2035754). In a yarn feeder of this type, the juxtaposed and orderly arrangement on the second part of the bobbin causes the bobbin to move to the front end member by virtue of the fact that the polygonal bar is sufficiently inclined. Reached by sliding. That is, in this arrangement, the excess length of each bobbin with respect to the perimeter of the polygonal rod is significantly increased due to the fact that the shape of the polygonal rod on the second part has a frusto-conical shape. Can be reached by However, this means that the use of a yarn feeder of this type is intended for placing the yarn in a continuous and relaxed state, for example for subsequent treatment of the yarn, for example for steaming the yarn. Limited to Moreover, the bearings, arrangements and drives of the spindles, which are respectively provided between the two polygonal rods, are very expensive and the construction style is easy to name. In this case, it is also not possible to draw the bobbin that is still present on the first part into the prepared thread reservoir.

In another yarn feeding device (German Published Patent Publication No. 2003760) in which the yarn is drawn out in order to feed the yarn through the head, for example in a circular knitting machine and a knitting machine, a central cylindrical shape Is provided with a fork-shaped body rotatably supported on the outside. The bottom of the thread groove of the central member and the outer surface of the rotatable fork tooth form a polygon around which the thread is wound. Here, the transfer from the first part to the second part takes place. That is, the volume of roll storage that can be reached is relatively small,
The use of this device is therefore limited to that of a machine for withdrawals, which in each case only requires relatively short yarns.

An object of the present invention is to provide a yarn supply device of the above type with a relatively large amount of yarn storage so that the yarn can be pulled out with a constant yarn tension while simplifying the structure and providing operational reliability. Is to be configured.

According to the invention, the object is that the polygonal-perimeter of the first part corresponds to the perimeter of the second part in radial directions with respect to the polygonal bar to which the bottom of the thread groove is connected. Resolved by being inward.

Claims 2 to 6 describe other advantageous configurations of the invention.

With the construction of the invention, a large yarn storage capacity for constant yarn tension draws by machines that consume side threads, such as weaving machines, is achieved which is reliable to use and which can be constructed at a relatively low cost. It becomes possible to form a yarn feeding device for preparing the yarn. This essentially means that the bobbin is delivered from the first part to the second part while maintaining an orderly arrangement of that bob, where the bobbin then carries the first part of the second part. Against this, the last chest surface is impacted, and it is reached by being pushed backward and in close contact with each other. The equal perimeter between the first and second parts guarantees that the thread layers on the second part have never been offset and ridden against each other due to loosening at the peripheral surface. To do. A pre-arrangement is carried out on the area of the first part and this pre-arrangement is maintained until the withdrawal is carried out, except that on the second part the bobbin is more than on the first part. Is to be more closely parallel. In addition, the amount of storage to be prepared is large as long as the bobbin body guided on the first part and still present in the thread groove is also used for withdrawal. This device is also configured in this way so that the yarns are fed backwards in succession from winding to winding without any arrangement being already spaced from the time of feeding. It is also possible to prepare a significantly long yarn length in which the yarn is fed to the first part at a significantly greater speed. During winding of the yarn, the rotating body rotates at the same time. The fact that there is only one corresponding rotary body associated with the polygonal rod allows a considerable simplification of the structure and the drive. Depending on the number of polygonal rods, a corresponding number of upright planes (chest planes) work for reliable feeding of the bobbin. The fact that the threads have a serrated cross-section facilitates the withdrawal of the bobbin from the first part. The vertically oriented ridges are oriented perpendicular to the longitudinal axis of the rotor, whereas the dorsal flanks have a suitable inclination angle. In order to make the feeding of the winding store present in the region of the rotating body somewhat easier, in particular depending on the quality and construction of the yarn used. A sliding step for the thread is provided on the outer surface of the polygonal rod half the length of the cylindrical part. This sliding step allows for some tension balancing, especially for elastic yarns. Furthermore, the loading of the yarn in the region of the yarn feeding position is expediently carried out by the fact that the end of the polygonal bar facing this yarn feeding position departs from the ring. This ring forms a frusto-conical sliding surface in the yarn feeding surface. The thread reaches this sliding surface from the thread eye. The thread then passes by the end of this ring.
This end face is located substantially in the same row as the chest portion existing in the area of the yarn feeding position. Therefore, the thread is reliably placed in the first end region of the thread groove. The present invention will be described in detail with reference to the embodiments illustrated in the accompanying drawings.

The yarn feeding position generally designated by reference numeral 1 is provided with a carrier plate 2, and an electric motor 3 is provided on the carrier plate.
At one end of this electric motor, the motor shaft 4 carries a wedge-connected disc 5, which accommodates a thread eye 6 at its outer edge. This thread eye 6 transitions into the radial passage 7 of the disc 5. This radial passage communicates with the central bore 8 of the motor shaft 4.

A rotating body 9 is mounted on the motor shaft 4 at a stepped portion 4 '. In detail, this rotating body consists of a boss 10, which is the inner ring of the roller bearing 12.
Under the interposition of 11 and the spacer ring 13, the boss 5'of the disk 5
Supported by. Fixing to the boss 5'is effected by a nut 14, which is screwed into the outer thread 15 on the end side of the part 4'of the motor shaft 4. In this case, it is done under the interposition of the fixed washer 16. In this way, the rotating body 9 rotates together with the winding device composed of the thread eye 6 and the disc 5.

The rotor 9 is provided with a thread groove 17 in the form of a continuous thread on the jacket surface. The thread groove is formed in a sawtooth shape when viewed in a vertical section. The tooth flank 18 provided facing the yarn feeding position A is inclined upward in the direction of the free end and in the outward direction, and from the short screw thread oriented in equilibrium with respect to the motor shaft 4. I'm off. The narrow thread 19 is formed by this of the thread groove 17, so that it is located at regular intervals of the thread. Further, the thread groove 17 is provided with an upright surface (chest) 20 which is oriented in the direction perpendicular to the motor shaft 4 and which is opposite to the yarn feeding position A. This standing surface is inserted into the end surface 21 of the rotating body 9 on the side opposite to the yarn feeding position A.

The roller bearing 12 is provided in the boss 22 of the carrier plate 23.
The carrying plate 23 is formed in a pot shape, and the permanent magnet 24 is housed in its inner chamber facing the disc 5. This permanent magnet is a permanent magnet 26 provided in an electric motor casing 25.
Collaborate with. In this way, the carrier plate 23 is prevented from rotating together with the rotation of the motor shaft 4. The carrier plate 23 is housed in the disc 5 like a stack, the jacket wall 23 'of which is surrounded by a ring 27 which is firmly connected to the jacket wall 23'. The ring 27 leads to a frustoconical sliding surface 28 connected to the thread eye 6. This sliding surface ends in the end face 29. The upright surface 20 ″ of the upright surface (chest) 20 existing on the same radius as the yarn feeding position A is located in substantially the same row as the end surface 29 of the ring 27. The end surface 29 of the ring 27 is provided with an equal angle distribution. There are six polygonal bars 30 protruding, which on the end side transition into a drawer jar 31. A known cushion ring 32 belongs to this drawer jar. The buffer ring itself is mounted on a carrier plate 33. The carrier 33 is connected in a suitable manner to the electric motor casing 25. The curved free end 33 'of the carrier plate 33 has a thread withdrawing eye. Equipped with 34.
The polygonal rod extends in a straight line, particularly in balance, from the ring 27 to the withdrawal end.

The carrying end 33 is associated with a light barrier, which is generally designated by the reference numeral 35, as a scanning device. This light barrier allows adjustment parallel to the longitudinal axis of the reservoir formed by the individual polygonal rods 30. Similarly, the adjustment of the buffer ring 32 in the longitudinal direction is possible. This light barrier controls the yarn feeding.

The standing surface 20 of the rotor 9 projects in the reflection direction from the connecting line of the polygonal neck formed by the polygonal rod 30. In this way, the upstanding surface 20 of the thread-accommodating groove 17 located between each two individual polygonal bars 30 adjacent to each other forms a collision surface 20 '. But thread 17
The bottom portion 19 of the bulge extends radially inward from the connecting line. That is, this bottom 19 does not deflect the yarn in the other polygon-corner direction. A small sliding step 36 is formed on the outer surface of the polygonal rod 30 in the half length of the cylindrical portion of the rotor 9. The other small sliding step 37 of the polygonal rod 30 lies in the area between the end face 21 of the rotor 9 and the drawer pot 31. These steps do not actually affect the total perimeter of the polygon-reservoir. This perimeter is the same in the first part I as the perimeter of the second part II.

The yarn F drawn from the storage bobbin, not shown, enters the bore 8 of the motor shaft 4 and from there the radial passage 7 of the disc 5
To reach thread eye 6. From there, the thread F passes through the frustoconical sliding surface 28, and the standing surface 20 ″ existing beside the yarn feeding position A does not hinder the running of the thread F.
Run into the first end of 17. The frustoconical smooth surface 28 allows the thread to enter the thread groove. Thread eye 6 and rotating body 9
Rotates in the direction of rotation as clearly shown in FIG.
Since the thread groove 17 is left-handed, the individual bobbin is wound on the first part I. The impingement surface 20 'of the upstanding surface 20 of the thread groove 17 extending between the polygonal rods 30 enables a thread-free feed of the thread layer. When the first part I is fully wound, the bobbin is lifted from the upright surface 21 that also acts as a collision surface of the rotating body 9, and in close contact with the bobbin and the bobbin, the motor shaft 4 Stop driving-routed into the second part II into the area of the light barrier 35. The yarn withdrawal is performed via the withdrawal jar 31 and the yarn withdrawing eye 34. When the yarn storage capacity is reduced, the light barrier 35 connects the drive, thereby fulfilling the yarn storage capacity.

The new features described above and illustrated in the drawings are important features of the invention even if not explicitly claimed in the claims.

[Brief description of drawings]

 FIG. 1 is a side view of the yarn feeder, FIG. 2 is a vertical longitudinal sectional view of an actual size of the yarn feeder in the storage body region, FIG. 3 is a sectional view taken along line III-III of FIG. The drawing is an enlarged cross-sectional view taken along the line IV-IV in FIG. The symbols in the figure are: I ... first part, II ... second part 17 ... screw groove, 18 ... back surface 19 ... bottom, 28 ... sliding surface 30 ... polygonal rod, 36 ... … Sliding step

Claims (6)

[Claims] 1. A storage device comprising a storage body, the storage body having two axially successive parts, the yarn being fed tangentially to form a spool storage part. One part is formed in the form of a polygonal body formed by rods, and provided with an upstanding surface for feeding the bobbin onto the second part formed by the extension of the polygonal rods A thread groove is provided that rotates between the rods, the thread is withdrawn from this second part head-over, and the first existing thread winding for controlling the thread supply in this thread reservoir is provided. In a yarn feeder provided with a scanning device acted on by the body, the polygon-perimeter of the first part (I) corresponds to the perimeter of the second part (II) and the thread groove ( Bottom of 17) (19)
Yarn feeders, which are present inward in the radial direction with respect to the polygonal rods (30) connected to each other. 2. The feeding device according to claim 1, wherein the dorsal side surface (18) of the thread groove (17) is configured to rise in the direction of the withdrawal end and outwardly with an inclination. Thread device. 3. The yarn feeding device according to claim 1 or 2, wherein the thread groove (17) is formed in a sawtooth shape in a longitudinal section. 4. The thread groove (17) is formed as a continuous thread on the cylindrical jacket surface of a cylindrical rotating body (9) rotating up to the polygonal rod (30). The yarn feeder according to any one of the first to third terms. 5. A sliding step (36) for the thread (F) is provided on the outer surface of the polygonal rod (30) with a length approximately half that of the cylindrical portion of the rotating body (9). , The yarn feeding device according to any one of claims 1 to 4. 6. A frusto with the end of the polygonal rod (30) facing the yarn feed position (A) starting from the shilling (27), which ring lies within the yarn feed end. Conical sliding surface (2
8), and the standing portion (20 ″) that exists in the same radius as the yarn feeding position (A) is in substantially the same position as the end surface (29) of the ring (27). The yarn feeding device according to any one of claims 1 to 5.