Title of Invention

A DEVICE FOR SUCKING OFF CONTAMINATION IN A TEXTILE MACHINE

Abstract

ABSTRACT 1527/MAS/95 This invention relates to a device for sucking off contaminations in a textile machine, in particular fibre material, fluffs or similar on a drawings unit of a ring spinning frame with at least one suction tube whereby one of its ends is connected with a suction cabinet and whereby an opening of its other end is being arranged to a roller, in particular a drawing roller, the suction tube being stepwise lowerable by an angle (w) away from the roller.

Full Text

The invention relates to a device for sucking off contaminations in a textile machine, in particular of fibre fly. fluffs or similar on a drawing unit of a ring spinning frame, whereby at least one suction tube with one of its ends is connected with a suction cabinet and with an opening of its other end is being arranged to a roller in particular a roller of a drawing unit. Such a device is for instance described in the German utility model application (Gebrauchsmuster) G 92 03 2532. For the present invention reference is also made to the known art mentioned in said application. Conventionally, it is known that a number of suction tubes are connected with each other, and which are known as so called pan flute tubes". Six to eight of these tubes are then together arranged to a fluted roller of a drawings unit. When processing synthetic fibres in particular, an accumulation of windings occurs increasingly on the fluted roller, which not only causes thread breaks but also pushes the suction tubes away fiom the fluted roller, so that said tubes M downwards or are lowered. If one such large accumulation of windings occurs only in the vicinity of one single suction tube, the other suction tubes being connected with said tube are also pushed away torn the fluted roller and are lowered. Accordingly, in tiie neighbouring drawing units an effective suction is not maintained anymore, so that an accumulation of windings are also formed there very quickly, which causes thread breaks. Thus one single accumulation of windings can cause problems in a series of neighbouring drawing units. It is the object of the present invention to overcome these drawbacks. The task as object of the invention is solved in that the suction tube can be lowered stepwise by an angle away from the roller. This means that the neighbouring suction tubes are independent so that during an accumulation of windings near one of the suction tubes only this tube is pushed away from the fluted roller and lowered, the neighbouring suction tubes, however, are not affected. This means that in particular if a row of suction tubes arranged in „pan flute'-manner in a tube holder, still the lowering movement of each individual tube is possible, independently of the others. Preferably the suction tube is provided with lateral notches, which are guided along an inner guide track. By means of said lateral notches the suction tube can be lowered into the desired different positions. Normally it is sufficient if the inner guide track is provided with at least an upper and a lower positioning trough, which are separated by a hiimp in-between them. The upper positioning trough is arranged in such a way that the opening of the suction tube is located near the fluted roller; by sliding the suction tube, lateral notches respectively into the lower positioning trough, the opening is relatively far away from the fluted roller. To overcome the elevation between the upper and the lower positioning trough the suction tube has to be moved axially. This movement takes place against an elastic seal, by which the suction tube is supported against a wall of the suction cabinet. Preferably a number of suction tubes are arranged in a common tube holder, which is arranged to the fluted roller, the drawing unit or a similar device. Said tube holder is also provided with the above mentioned inner guide track, whereby each suction tube is provided with its own inner guide track. This allows the lowering of a single suction tube, while the other suction tubes remain in their operating position to serve :heir task, in particular the prevention of an accumulation of drawings. This is one substantial advantage of this invention. Preferably also the tube holder itself and thus the suction :ubes arranged within it should be lowered together. For this :he tube holder is preferably guided by means of lateral guide elements in guide tracks. Thereby the guide tracks are arranged jtationarily on a part of the machine, for example on a side /all. They are also preferably provided with at least two positioning troughs into which the lateral guide elements can be slided. This also preferably takes place against the above mentioned elastic seal. As lateral guide elements for instance rollers are used, which facilitate a sliding into the various positioning troughs. In a preferred embodiment the tube holder consists of a single piece element, made of a sheet metal strip. Forming is done by punching out corresponding holes, slots and a folding job. For instance the front wall of the tube holder is formed to the above mentioned inner guide track. Via, for example intermediate slanted surface, this front wall is followed by a top wall onto which again a rear wall is folded, which is provided with holes to introduce the seals or the ends of the suction tubes. Onto the longitudinal side of the top wall follow the side walls, which serve to hold the lateral guides. By this simple way a tube holder is provided which not only allows separate lowering of each single suction tube, but which also enables that the entire row of suction tubes can be lowered. Further advantages, characteristics and details of the invention will be disclosed by the following description of preferred embodiments and according to the figure, wherein: Accordingly the present invention provides a device for sucking off contaminations in a textile machine, in particular fibre material, fluffs or similar on a drawing unit of a ring spinning frame with at least one suction tube whereby one of its ends is connected with a suction cabinet and whereby an opening of its other end is being arranged to a roller, in particular a drawing roller, the suction tube being stepwise lowerable by an angle (w) away from the roller. Further advantages, characteristics and details of the invention will be disclosed by the following description of preferred embodiments and with reference to the accompanying drawinss. wherein: ■»> —■■■' Fig. 1 shows a partial section of a device for sucking ofl contaminations on a drawing unit of a ring spinning frame Fig. 2 shows a side view of the tube holder according to the invention Fig. 3 shows a front view of the tube holder according to figure 2. According to figure 1 between a suction cabinet 1 serving as a central suction tube and an only partially shown drawing unit 2, a device R according to the invention for sucking off contaminations on said drawing unit 2 is arranged. Within said device R a number of parallel aligned suction tubes 3 are arranged in a tube holder 4, whereby each suction tube 3 is introduced through a not further shown opening in a wall 6 of the suction cabinet 1 and is supported against the wall 6 by means of an elastic seal 5. The elastic seal 5 is provided with at least two lateral notches 5a which rest in the corresponding recesses 5b of the tube holders 4 or of its rear wall 31 (see figure 3), thus turning of the suction tube 3 is prevented, since it is kept in frictional contact within the seal. At the opposite end of the part of the suction tube 3, which is mounted in the seal 5, the suction tube 3 is provided with an opening 8 which is tailored to a lower drawing unit supply roller (fluted roller) 9, through which the contaminations are sucked off the fluted roller 9. Below the opening 8 a tongue 11 extends, to serve as a grip to move the suction tube within the tube holder 4. Furthermore the suction tube 3 has a collar 12 slipped onto it, from which lateral notches 13 protrude. Preferably the notches 13 are arranged approximately parallel to the notches 5a protruding laterally. In the present exemplified embodiment only one lateral notch 13 is shown, which rests in a positioning trough 14 of an inner guide track 15, whereby said inner guide track 15 is formed by the front wall 16 of the tube holder 4. Besides the positioning trough 14 the inner guide track 15 is provided with a further lower positioning trough 17, into which the lateral notch 13 can be moved. Thus an axis A of the suction tube 3 moves downwards by an angle w, whereby the lateral notches 13 on their way from the positioning trough 14 to the lower positioning trough 17 pass over a hump 18 of the inner guide track 15. During the passing over of the hump 18 the suction tube 3 is moved in direction of the axis A against the seal 5, which is possible due to the elastic property of said seal 5. The return force of the seal 5 has the effect that the lateral notch 13 is also pressed into the lower positioning trough 17 and whereby the suction tube 3 is held. By way of the above described manner all single, parallel aligned suction tubes 3 arranged within the tube holder 4 can be lowered separately. Also within the scope of this invention it is included that the complete tube holder 4 can be lowered, in relation to the fluted roller 9 to which a pressure roll 10 is arranged. This is accomplished by means of two lateral guide elements 19.1 and 19.2, which in the present case are designed as rolls. To each lateral guide element 19 a guide track 20 is arranged, which is fixedly held on a housing wall 21. The guide track 20 is provided with two positioning troughs 22 and 23, into which the lateral guide element 19 can slide. In figure 1 the lateral guide element 19 is in the upper positioning trough 22, if however, the tube holder 4 is moved downwards by an angle w, the lateral guide element 19 moves over a trough edge 24 of the guide tracks 20, whereby the tube holder 4 is pressed against the elastic seal 5. Afterwards the lateral guide element 19, indicated with dotted lines, glides into the lower positioning trough 23. According to figure 2 and 3 the lateral guide elements 19.1 anc 19.2 protrude from the side walls 25 of the tube holder 4. For the case that the lateral guide elements 19 are made as rolls, the side wall 25 can be provided with holes 26 to hold a roller bearing. Both side walls 25 are interconnected through a top wall 27, followed by a slanted surface 28 and the front wall 16 with the inner guide track 15. In particular in figure 3 it is shown that the front wall 16 is provided with slots 29, into each of which one suction tube 3 is movably mounted. The front wall 16 is extended by a lower wall part 30 into which the slots 29 also extend. Towards the suction cabinet 1 the top wall 27 is followed by a rear wall 31, in which are holes 32 to hold the sealing 5, the end of the suction tube respectively. Preferably the tube holder 4, consisting of lower wall part 30, front wall 16, slanted surface 28, top wall 27, rear wall 31 and side walls 25, is a single piece element, for instance made of metal. For this the single piece element of the tube holder 4 is formed of sheet metal by a folding job. WE CLAIM: 1. A device for sucking off contaminations in a textile machine in particular fibre material, fluffs or similar on a drawing unit (2) of a ring spinning frame with at least one suction tube (3) whereby one of its ends is connected with a suction cabinet (1) and whereby an opening (8) of its other end is being ananged to a roller (9), in particular a drawing roller, the suction tube (3) being stepwise lowerable by an angle (w) away fix)m the roller (9). 2. The device according to claim 1,wherein the suction tube (3) is provided with lateral notches (13) which are guided along an inner guide track (15). 3. The device according to claim 2, wherein the inner guide track (15) seen from the suction cabinet (1) is provided with at least one upper and one lower positioning trough (14,17) 4. The device according to any one of the claims 1 to 3, wherein the suction tube (3) is resting against a wall (6) of the suction cabinet (1) through an elastic seal (5). 5. The device according to any one of the claims 2 to 4, wherein the inner guide track (15) is arranged to a tube holder (4) which is lowerable. 6. The device according to claim 5, wherein the tube holder (4) by means of lateral guide elements (19) is guided in stationary guide tracks (20). 7. The device according to claim 6, wherein the guide trades (20) are provided with at least two positioning troughs (22, 23) to receive the lateral guide elements (19) which are preferably made as rollers. 8. The device according to any one of the claims 5 to 7, wherem the tube holder (4) carries a front wall (16X which forms the inner guide track (15X two side walls (25) to hold the lateral guide elements (19) and a rear wall (31) which is resting against the seal (5). 9. The device according to any one of the claims 5 to 8, wherein the tube holder (4) consists of a one piece element made of a sheet-metal strip. 10. The device according to any one of the claims 8 or 9, wherein the rear wall (31) is provided with a number of holes (32) to receive a number of section tube ends and/or seals (5) and in that the front wall (16) is provided with a number of slots (29) to guide the suction tubes (3). 11. A device for sucking oft contaminations in a textile machine, substantially as herein described with reference to the accompanying drawings.

Documents:

1527-mas-1995 abstract.pdf

1527-mas-1995 claims.pdf

1527-mas-1995 correspondence others.pdf

1527-mas-1995 correspondence po.pdf

1527-mas-1995 description (complete).pdf

1527-mas-1995 drawings.pdf

1527-mas-1995 form-1.pdf

1527-mas-1995 form-26.pdf

1527-mas-1995 form-4.pdf

1527-mas-1995 form-9.pdf

1527-mas-1995 petition.pdf