DE9203253U1 - Device for extracting contaminants in a textile machine - Google Patents

Description

Machine factory RIETER AG
CH-8406 Winterthur

Device for extracting contaminants in a Textile machine

The invention relates to a device for sucking out impurities in a textile machine, in particular fiber material, fluff or the like on a drafting system of a ring spinning machine, wherein a pipe is connected on the one hand to a suction box and on the other hand is associated with an outlet in a mouth surface of a roller, in particular a drafting system delivery roller.

Such devices are also used to suck up a thread in the event of a thread break and to suck up fluff or similar contaminants that arise during spinning. For example, CH-PS 257 367 shows a catcher nozzle for removing the thread in the event of a thread break, whereby this catcher nozzle widens out in a funnel shape towards a roller.

CH-PS 292 039 shows a system for extracting broken yarn threads, dust and fluff on spinning machines and flyers, which has become known under the name "thread breakage extraction system" and uses extraction pipes connected to a central air conveyor system, with each fiber bundle - thread or roving - being assigned such an extraction pipe.

Also known from DE-OS 36 42 820 is a thread breakage individual suction pipe which is elastically attached to the suction channel by means of a seal and which engages under a drafting system with its suction opening.

Another suction pipe is shown, for example, in Swiss patent application No. 04 109/89-0, for which special holders are provided.
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With all of these suction and exhaust pipes shown, the main problem is the fixing in relation to, for example, a drafting roller.

The present invention is based on the object of creating a simple possibility for fixing such suction pipes.

To solve this problem, the tube is assigned a support body which has a snap groove for securing the tube to a rod.

Since the suction pipes are increasingly made of plastic using the injection molding process, it is possible in a simple way to form a support body onto the pipe itself, which is provided with a snap groove. This support body then works together with a rod that is either already present or that is to be additionally arranged, for example in a ring spinning machine. The dimensions of the support body must be selected so that the outlet of the pipe or the above-mentioned outlet surface is positioned as favorably as possible in relation to, for example, a drafting roller.

For the sake of simplicity, the snap groove consists of a rear wall, to which a partially circular base is connected, which then turns into at least one flexible flap

The rear wall, the partially circular base and the flexible tabs are shaped roughly semicircularly to form the snap groove, with the radius of the semicircle corresponding to that of the rod. This means that there is no difficulty in inserting the rod into the snap groove.

In order to secure the support body to the rod, the flexible tab should either have an additional locking lug molded into it, or this flexible tab should, together with the partially circular base and the rear wall, form a partial circle that extends beyond a semicircle. In both cases, this flexible tab gives way when the rod is clipped in and grips the rod in a clamping manner after the rod has been inserted into the snap groove.

In one embodiment, the entire front wall of the snap groove consists of such a flexible tab. In other embodiments, however, the front wall is divided by material cuts into flexible tabs and further tabs, whereby these further tabs together with the part of the base and the rear wall assigned to them only form a semicircle for the snap groove.

It is conceivable that such a support body is formed on the above-mentioned pipe only as a long hook. In a preferred embodiment, however, the support body also forms the above-mentioned mouth surface with the mouth of the pipe, so that a very stable suction pipe is created here.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing, which shows in
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Figure 1 is a side view, partly in section, of a suction pipe according to the invention in the position of use on a ring spinning machine;

Figure 2 is a perspective view of the suction pipe according to Figure 1;

Figure 3 is a perspective view of another embodiment of a suction pipe.

According to Figure 1, a suction pipe 3 is arranged between a suction box 1 as the central suction line and a stretching device 2 (only partially shown), which is preferably made of plastic using an injection molding process. This suction pipe 3 is inserted with its pipe 4 into the suction box 1 and is sealed off from this suction box 1 by a flexible seal 5.

On the other hand, the tube passes into a support body 6, which forms a snap connection with a rod on the ring spinning machine (not shown in detail otherwise).

After the outlet of the suction pipe 3, an outlet surface 8 of the support body 6 is partially adapted to the contour of a lower drafting system delivery roller 9 and is located close to this drafting system delivery roller.

An upper drafting system delivery roller 10 is assigned to the lower drafting system delivery roller 9, with a thread 11 being guided between the two delivery rollers 9 and 10.

In Figures 2 and 3, the outlet 11 of the tube 4 can be seen near the lower drafting device delivery roller 9, whereby this outlet 11 is conically widened. Furthermore, a semicircular snap groove 12 can be seen more clearly, which receives the rod 7 in the position of use shown in Figure 1. The snap groove 12 consists of a rear wall 13, a front wall 14 and a partially circular base 15. In the axial direction of the rod 7, the front wall 14 is formed by tabs 16. In the present embodiment according to Figure 2, a narrow tab 16c with a locking lug 17 is located between two wider tabs 16a and 16b. The tabs 16a, 16b and 16c are separated by corresponding material incisions 18.

Since the tab 16c in particular is designed to be elastic, it can move outwards when a rod 7 is inserted into the snap groove 12, so that the locking lug 17 can engage over the rod 7. The locking lug 17 then secures the suction pipe 3 to the rod 7.

If the entire suction pipe 3 is made of plastic, the tabs 16a and 16b are also elastically designed so that any inaccuracies in the fit of the rod 7 in the snap groove 12 can be taken into account. However, this does not have to be the case since the snap groove 12 is semicircular, with the radius of this semicircle corresponding to the radius of the rod 7.

The snap groove 12 is tolerated in such a way that, when snapped in, no more stresses (elastic deformations) are present, so that no cold flow of the plastic occurs.

Figure 3 shows a further embodiment of a suction pipe 3a, where the pipe 4 is also connected to a support body 6a similar to Figure 2.

There is only a difference in the arrangement with regard to the tabs 16 that form part of a snap groove 12a. In the embodiment according to Figure 3, two tabs 16e and 16f with a corresponding locking lug 17a are provided on the side of a centrally arranged tab 16d without a locking lug. Also as in the embodiment according to Figure 2, the locking lugs 17a overlap the rod 7 in the position of use. The double arrangement of the locking lugs 17a slightly improves the holding of the suction pipe 3 on the rod 7.

DR. RER. NAT. PETER H. WEISS PATENT ATTORNEY P.O. BOX 1250 ZEPPELINSTRASSE D-W 7707 ENGEN

DR. WHITE

PATENT ATTORNEY EUROPEAN PATENT ATTORNEY

TEtCFOK': &Iacgr;&Ogr; 77 33) 2014 -15 fviOBIUELEtoN: 01611 708239 - TELEFAX: (07733) 2678 TELEX: 7OC763 weis d

File number:

1961.4

Date: 20.01. 1992

POSITION NUMBER LIST 1 Sauq box 34 2 Plug-in system 35 3 Suction pipe 36 4 Pipe 37 5 poetry 38 6 Support body 39 7 pole 40 8th Mouth area 41 9 lower drafting system
•Tiger roller 42 10 upper drafting system
-Qeferwalas 43 11 Estuary 44 12 Snap groove 45 13 Back wall 46 14 Front wall 47 15 part-circular floor 48 16 rag 49 17 locking lug 50 18 Ma te rial cutting 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66

Claims (7)

PATENT CLAIMS 1. Device for suctioning off contaminants in a textile machine, in particular fiber material, fluff or the like on a drafting system of a ring spinning machine, wherein a pipe (4) is connected on the one hand to a suction box (1) and on the other hand to an outlet (H)/an outlet surface (8) of a roller, in particular a drafting system delivery roller (9), characterized, that the tube (4) is assigned a support body (6) which has a snap groove (12) for securing the tube (4) to a rod (7). 2. Device according to claim 1, characterized in that the snap groove (12) consists of a rear wall (13), a partially circular base (15) and at least one flexible tab (16c, 16e, 16f) adjoining thereto. 3. Device according to claim 2, characterized in that the rear wall (13), base (15) and flexible flap (16c, 16e, 16f) form a partial circle of more than a semicircle. 4. Device according to claim 2, characterized in that a locking lug (17, 17a) is formed on the flexible tab (16c, 16e, 16f), which engages over the rod (7) in the position of use. 5. Device according to one of claims 2 to 4, characterized in that the flexible tab(s) (16c, 17e, 16f) are separated from further tabs (16a, 16b, 16d) by material incisions (18). 6. Device according to one of claims 1 to 5, characterized in that the support body (6) also forms the mouth surface (8). 7. Device according to one of claims 1 to 6, characterized in that the tube (4) and the support body (6) are made in one piece from plastic.