DE1510719B1 - Cleaning device for drafting cylinder - Google Patents

Description

ι 2

The invention relates to a cleaning device supporting the machine, the vibrations of which are much different for drafting cylinders with a cylinder, so that such a device is essentially unreliable under the influence of the device. In the case of the actually desired gravity touching, a vibrating ideal condition of a completely vibration-free movement executing scraper, whose vibrating machine would run parallel to the cylinder axis and which would be transmitted to the scraper,
elastic Abstreifhülse the cylinder surface ent- The task to be solved with the invention consists of long touches a line. now in it, the known ones, on the drafting system cylinder

Cleaning devices adjacent to the circumferential cylinder and periodically lifted off from it

that of drafting devices, which improve the cylinder stripping devices so that they

have constantly touching wipers, are as noiseless as possible, aperiodic lift off and

knows. The use of such scrapers means that there are no detrimental effects on the spinning technology

especially together with a suction device.

device, the cylinders can be cleaned relatively easily. This object is achieved according to the invention; However, in all stripping elements, the 15 resolved problem is that with a stripper, the risk of vibration that the stripping axis from the cylinder runs parallel to the cylinder axis of the cylinder, the fibers partially stick, in particular and its elastic stripping sleeve, the cylinder on top of it when they are on the strippers already touched fat, surface along a line, this famous melt or the like has accumulated. It can approximate line in the rest position of the scraper facing the cylinder axis and the axis of oscillation extraction is carried in this way in spite of, for example, existing ²⁰ of the Abdenen tufts at the strippers streifers extending plane, and that the imaging, which, if it reaches sufficient size, brush in bearing brackets provided with slots, the cleaning effect of the scraper is mounted displaceably in such a way that it interferes with everyone. In addition, there is the risk that, as a result of frictional entrainment by the rotating parts of these fiber tufts, they will wind up on the cylinder or that vibration caused by the cylinder will briefly get into the sliver to be drawn. Can even be lifted off the cylinder.

with periodic manual cleaning of the scraper By such an arrangement of the scraper

if this risk cannot be completely ruled out, it is achieved that this danger is opposite to the cylinder

will. who performs a double movement. It arises

It has already been recognized that with periodic 3o, namely through the adjustment of the scraper,

Lifting the scraper from the cylinder the accumulation lent the direction of rotation of the cylinder not just one

development of fibers on the same as well as the formation of movement tangential to the cylinder, but as a result

of tufts prevented or at least delayed the further given by the guide means

can be. Degree of freedom also at the same time a practical

In known devices of this type, the 35 radial lift-off movement, because the wiper sleeve at

Scrapers to repeat it briefly ^de r from the cylinder friction drive by the cylinder against

take off, emit a vibratory movement, the plane defined by the two axes on-

this movement either from one with the runs.

Cylinder revolving cam-shaped part on the The degree of freedom for the radial deflection of the

Holder of the swiveling scraper over- 4 <> Wiper can either by appropriate

will wear, or the scraper is swingable by Gleitführunoen at the ends of the self

be given a resilient holder against the cylinder-shaped scraper, or else

the pressed, whereby the machine vibration itself the scraper can be pivoted and at the same time

transferred to the scraper and attached to the same in slidably mounted arms.

Should move vibrations. 45 According to a further feature of the invention

The generation of vibrations through the shark closes the plane through the line of contact and

Revolving cams that strike the scraper, the oscillation axis in the rest position of the scraper

Although it produces satisfactory results in cleaning with the cylinder axis and the

supply effect, such a device, however, has an axis extending plane expediently an angle

mechanical and spinning disadvantages. On the one 5o 10-30 a ^c.

on the other hand, namely the cams and holders of the Ab- Furthermore, it is recommended that the Abstreifhülse in

exposed to use, provided that the cams are made of an elastically deformed

Cylinders are provided, the bearing of which is also made in Mitmbaren hose. This tubular

be drawn to passion. On the other hand, the wiper sleeve is attached to it in the longitudinal direction

by this measure, the noise level in the 55 penetrating rod-shaped holder is fixed, the

Machine room increased in an undesirable manner. The one between his carrying the wiper hose

Spinning disadvantages are that due to the middle part and its ends in the manner of torsion

the lifting of the scraper always has on the same spring-acting elements.

Place the cylinder on the latter.

Narrow contamination zone forms, which experience form of the cleaning device according to the invention

Shown according to the uniformity of the fiber direction. It shows

Processing has a very unfavorable effect. F i g. 1 is a perspective view of a

The other known way of generating the drafting cylinder pair with one of the upper cylinder

Vibrations, namely due to the scrapers assigned to the machine vibrators,

tions, is usually poor in their cleaning effect. 2 shows a cross section along the line II-II

satisfactory because the amplitude in FIG. 1,

the oscillation is not large enough to make the Ab- F i g. 3 a longitudinal section through the one scraper

strip sufficiently to take off. Depending on the type and dispatcher,

ORIGINAL INSPECTED

Claims (4)

3 4 F i g. 4 and 5 each have a cross section similar to FIG. 2 30 relative to the upper cylinder R ensures that and that the scraper 10 with respect to this one F i g. 6 a to 6 e the wiper in different operating angle \ occupies (F i g. 5). The angle of attack α Movement phases with respect to the cylinder surface. is preferably chosen between 10 and 30 °, each The in F i g. 1 with 10 designated scrapers but 5 larger angles of attack are also possible. the consists of a rod-shaped body 11, which is in the contact line L of the scraper on the cylinder R middle area of a stripping sleeve 12 is therefore outside, specifically with respect to the through flexible material, e.g. B. from a rubber hose, an arrow indicated direction of rotation of the cylinder is surrounded. The wiper sleeve 12 is on the body 11 ders R in front of the plane E, which the cylinder axis X. by a profiled elongated holder 13 and contains the oscillation axis Y of the scraper 10, that in turn by means of screws 14 on the body. The mode of operation of the device shown is held by 11 and the part 12 on the body is as follows: When the cylinder R is in the direction 11 stuck. of the arrow rotated, the wiper sleeve 12 is As shown in FIGS. 4 and 5 can be seen, the following friction from the surface of the cylinder from the body 11 preferably has an approximately trapezoidal 15 of the rest position (Fig. 6a) entrained and deforgen cross-section with a relatively wide base 15, while the body 11 is its original position while the top 16 is narrower. The reverse is retained for the time being (Fig. 6b). With the other "Mitseite 17" runs approximately at right angles to the base, if the sleeve 12 would now also be the body 11 while the front side 18 is inclined inward in its bearing parts 25 against the effect of the. Between the base 15 and the front side 18 20 torsion elements 29 twisted, with the latter a rounded nose 19 is formed. Tensioned (Fig. 6c). The line of contact L The body 11 has at both ends it has meanwhile moved through the plane E a coupling pin 20 (Fig. 2) with a cylindrical change. The twisting of the body 11 causing Cross-section on which a tapered coaxial force F (Fig. 4) breaks down into the perpendicular Bearing pin 22 connects (Fig. 3). The surface 25 on the acting components A and B. The com- of the coupling pin is appropriately split. A acts parallel to the movement path, ie rough, e.g. B. by a knurl 21. to the direction of the slots 33 and has the lever According to FIG. 3 is an arm a on the journal 22. On the other hand, the lever arm b acts on-Lagerhüise 25 placed, the z. B. made of nylon or pointing component B under a right winein another material with good sliding properties for this trajectory. The strength was there. The sleeve 25 has a cylindrical sufficient size a displacement of the coupling part 26, which faces the pin 20, streaks in the direction of the path of movement, and a square or rectangular cross-section, the sleeve 12 is provided as a result of their relaxation cut bearing piece 27. Between the resiliently slightly from the surface of the cylinder R parts 26 and 27, a shoulder part 28 is provided. 35 lifted (Fig. 6d). The torsion spring elements on the coupling pin 20 and the coupling part 29 and also the sleeve 12 deform under 26 a connecting these parts with each other the effect of the released energy even until the rubber spring element 29 in the form of a sleeve is pressed a little beyond its original position. Instead of rubber, another elastic sense can also be used (FIG. 6e). sches material or a metallic torsion spring 40 then allows the acting on the wiper be used. Preferably, the upper end of gravity is also moving this downwards again. surface of the part 26 roughened or with longitudinal grooves, so that the sleeve 12 on the surface of the provided to a relative rotation of the sleeve 29 cylinder R resiliently impacts. This creates a to prevent part 26. slight impact or tapping action that causes As shown in FIG. 1, the scraper 10 is falling off at 45 any fiber whiskers that may still be present. The- its two sides each in a bearing bracket 30 which takes place at very short time intervals hook, whereby the bearing bracket does not show a process that is perceived by the eye as a vibration. are attached to the machine frame. The men will, allowed, the cylinder surface itself- Bearing brackets are to be kept completely clean, for example, from angled working, whereby by the Sheet metal pieces are formed and have a horizontal knocking effect even with relatively strongly adhering fibers Fastening part 31 and a vertical bearing part 32 or foreign parts are detached, on. In the bearing part 32 of each bracket there is a slot 33, as can be seen from the foregoing provided, the slots together forming an arrangement corresponding to the invention Form a path of movement for the scraper. Into that of the scraper without any other dimensions Schliize grip the bearing pieces 27 of the parts 25 and 55 received vibrations or oscillations, are in these in the extension direction of the frequency of the elasticity of the sleeve and Slides can be moved. In addition, the bearings form the torsion springs and the mass of the scraper parts 32 side stops for the shoulder parts 28 is dependent. The lifting of the scraper from the cylinder bend of the scraper relative to the surface to be cleaned 60 takes place several times during a cylinder R in the longitudinal direction of the same. rotation of cylinder J? and where preferably In operation, the scraper is under the influence of the number is not a whole multiple in order to prevent the force of gravity with the elastic sleeve 12 on the countries that the scraper again and again in the same Surface of the upper cylinder R on; in the process, the circumferential positions of the cylinder impinge on it, Does the system pressure speak of the radial component 65 .. nent of his claims to disclosure determined by the slots 33: Sliding direction resulting part of the own 1st cleaning device for drafting weight. By suitable assembly of the bearing bracket cylinder with a cylinder from above Essentially under the influence of gravity touching, an oscillating movement executing scraper, whose oscillation axis runs parallel to the cylinder axis and whose elastic wiper sleeve touches the cylinder surface along a line, characterized in that the contact line (L) in the rest position of the scraper (10) in front of the through the cylinder axis (X) and the oscillation axis (Y) of the scraper plane (E) and that the scraper is mounted displaceably in bearing brackets (30) provided with slots (33) so that it is slidably mounted in each case as a result of frictional entrainment by the rotating Cylinder (R) caused vibration can be lifted off the cylinder for a short time. 2. Cleaning device according to claim 1, characterized in that the plane through the contact line (L) and the oscillation axis (Y) in the rest position of the scraper (10) with the plane (E) forms an angle (α) between 10 and 30 ° . 3. Cleaning device according to claim 1, characterized in that the wiper sleeve (12) consists in a manner known per se from an elastically deformable tube. 4. Cleaning device according to claim 3, characterized in that the tubular Stripping sleeve (12) attached to a rod-shaped body (11) penetrating it in the longitudinal direction is that between its central region and carrying the tubular part having its ends acting in the manner of torsion springs elements (29). 1 sheet of drawings