US2694230A

US2694230A - Supporting and weighting device for the top rolls of textile drawing mechanisms

Info

Publication number: US2694230A
Application number: US261304A
Authority: US
Inventors: Dausch Erwin Friedrich
Original assignee: Vereinigte Kugellagerfabriken AG
Current assignee: Vereinigte Kugellagerfabriken AG
Priority date: 1950-12-21
Filing date: 1951-12-12
Publication date: 1954-11-16
Anticipated expiration: 1971-11-16
Also published as: NL87391C; FR1054179A; GB735022A; BE507608A

Description

Nov. 16, 1954 E.

SUPPORTING AND wE F. DAUSCH 2,694,230 IGHTING DEVICE FOR THE TOR ROLLS OF TEXTILE DRAWING NEcHANIsMs 3 Sheets-Sheet l Filed Dec. l2, 1951 I jim-m. l ...I

Nov. 16, 1954 E. F. DAUscH 2,694,230

SUPPORTING AND WEIGHTING DEVICE FOR THE TOP RoLLs oF TEXTILE DRAWING MEcHANIsMs Filed Dec. l2, 1951 3 Sheets-Sheet 2 Nov. 16, 1954 F'i led DeO. l2 1951 E. F. DAUscH 2,694,230 SUPPORTING AND WEIGHTTNO DEVICE FOR TEE TOR ROLLS OE TEXTILE DRAWING NEOHANIsMs 5 Sheets-Sheet 5 United States Patent() SUPPORTING AND WEIGHTING DEVICE FOR THE TOP ROLLS OF TEXTILE DRAWING MECH- ANISMS Erwin Friedrich Dausch, Esslingen, Germany, assignor to Vereinigte Kugellagerfabriken Aktiengesellschaft, Schweinfurt, Germany, a company of Germany This invention relates to a supporting device having weighted guide arms for the top rolls of drawing mechanisms as used in textile machines, the guide arms being preferably weighted from above. The supporting devices of the kind referred to include the supporting means proper that extend over the drawing zone, and guide arms pivotally mounted on supporting pins or the like to hold the shafts of the pairs of top rolls between the rolls so that lateral guide cheeks may be dispensed with.

My present invention has for one of its objects to simplify such supporting and weighting devices, particularly as far as guide arms and supporting springs are concerned. At the same time, my invention aims at the irnprovement of the known supporting and weighting devices with respect to their practical application. Contrary to conventional designs that prefer multipiece guide arms, this invention is primarily concerned with economizing production and operation costs by savings in the weight of materials used, by facilitating the insertion and removal of the rolls in case of breakdowns, and by providing a pivotal and pendulum-like suspension of the guide arms by means of supporting pins or similar means arranged in the supporting unit.

To the accomplishment of the foregoing and other more detailed objects which will hereinafter appear, my

invention consists in the supporting and weighting device and its elements, as well as the relation of the latter one to the other, as hereinafter are more particularly described in the specification and sought to be defined in the claims. The specification is accompanied by drawings in which:

Fig. 1 is a longitudinal cross section through a portion of a supporting device embodying features of my invennon;

Fig. 2 is a side view viewed in the direction of the arrow indicated in Fig. 1, also fragmentarilyy illustrating a pair of top rolls and the shaft carrying the rolls.

Fig. 3 is a cross section taken in the plane of the line 3-3 of Fig. l;

Fig. 4 shows a longitudinal cross section through a portion of a modified supporting device in its operating position, a pair of top rolls and a pair of bottom rolls being also indicated;

Fig. 5 is a fragmentary longitudinal cross section through another modification of a supporting device;

Fig. 6 is a cross section taken approximately in the plane of the line 6-6 of Fig. 5, also indicating a top roll;

Fig. 7 is a cross section taken approximately in the plane of the line 77 of Fig. 6; p

Fig. 8 shows a medial longitudinal cross section through the pivotal end of a guide arm;

Fig. 9 is a plan view of the pivotal end of the guide arm of Fig. 8;

Fig. 10 is a longitudinal cross section through the front end of a further modification of a supporting device;

Fig. ll is a cross section taken in the plane of the line 11-11 of Fig. l0;

Fig. l2 is a cross section through the free end of a guide arm; and

Fig. 13 is a plan view of the guide arm of Fig. 12.

Referring to the drawings, and more particularly lto Figs. l to 3, mounted in a supporting unit 1 which may be slidingly arranged is inserted a supporting pin 2 that bears the saddleshaped end of a guide arm 4. The mid- 2,694,230 Patented Nov. 16, 1954 ICC dle portion of the saddle surface is bent inwardly and contacts the supporting pin 2 along a circular line.

The free end of the guide arm 4 that carries the top roll shaft 36 (see Fig. 2) is formed as a half sleeve 5 provided withfolded-away projections or fiaps 6 for inserting a preloaded retaining or supporting spring 7, the curved portion 38 of which bearsagainst the shaft 36 fitted into the half sleeve 5. The shaft has mounted thereon two top rolls 39.

Wing-shaped sections of the guide arm are bent upwardly and combined to a bracket 8 which presses against a stop pin 9 when the supporting unit 1 is raised, thus preventing the guide arm 4 from tilting out.

The supporting spring 7 is vso inserted into the guide arm 4 with respect to the latters abutment like free end 5 that its line of force does not coincide with the direction of the pressure exerted by the loading spring 11 which is' The saddle suspension of the guide arm 4 on the supporting pin 2 makes possible a pendulum-like setting of the top rolls, carried by the guide arm, parallel to the axis of the bottom rolls. Between the saddle 3 of the guide arm 4 and the lateral Walls of the downwardly channel-shaped supporting unit 1, there remains some clearance to allow a displacement of the guide arm 4, thus improving the self-alignment of the top rolls parallel to the axis.

ln the embodiment of Fig. 4, the free end of the guide arm 45 is given the shape of a half sleeve designated 51. The half sleeve is provided with openings and bent portions to receive the supporting spring 57, such openings and bent portions being also shown in Fig. 5. In Fig. 5, the free end of the guide arm 43 is given the same shape as shown in Fig. 4. In the latter figure, the half sleeve 35 is provided with openings 20 and end portions 21 for the insertion of the spring 37. It will be understood that the spring 57 (Fig. 4) andf37 (Fig. 5), respectively, bears on the top roll shaft. Both the supporting spring 57 and the supporting spring 37 is inserted in such a manner as to be relieved of any pressure exerted by the weighting means. ln Fig. 4, a top roll is designated 40, and a bottom roll is identified by 41.

Referring to Figs. 5 to 9, the end of the guide arm that is mounted on the supporting pin 2 of the supporting unit 1 is formed as a claw, whereby three essentially semicircular fingers 14, 15and 16 encompass the pin 2 alternately from above and below.

Where only a swinging motion of the guide arm about the pin 2 is desirable, the fingers will be provided in such a manner that the two

outer fingers

14 and 16 encircle the pin from above, whereas the middle finger 15 will contact the pin 2 (from below (see Figs. 5 and 6). To prevent any play due to possible wear and tear, the fingers will encompass the pin with elastic tensional adherence.

A swinging and at the same time pendulum-like suspension of the guide arm on the supporting pin 2 is obtained with an arrangement of the fingers as shown in the suspension system of Figs. 8 and 9, whereby the middle finger 1S surrounds the supporting pin from above and the

fingers

14 and 16 bear against the supporting pin from below. Here some play is left beweenthe lower fingers and the supporting pin to` facilitate the alignment and to form the cylindrical contact surface of the upper finger to yield a slight clearance, within the range of the root of the finger.

To prevent the guide arm from falling out of the supporting unit, the guide arm is partially widened in such a manner that its projecting surfaces 17 (see Figs. 5, 6 and 7) contact inwardly folded edges 18 or the like of the lateral walls 19 of the supporting unit 100 if the latter is lifted. i

According to Fig. l0, I again provide a saddle 'type mounting 3 of the guide arm 44 on the supporting pin 2. The guide arm has two studs 50 to support the weighting springs 11 between which is arranged, on the bottom sideof the' g'uid arm, theabutment 55 which forms a half sleeveand holds -thesupporting spring 47.V The supporting unit 101 is provided at the forward end with a downwardly directed wall 23 which in turn is provided with aninwardlyb'ent'edge'zz. The free'end of the guide arm 44fi's bentmpwardly toA form av catch 24 the short horizontaledge '-portionZS of; which rests upon the inwardly 'bent-stop edge -22 las soon "as the rolls are unloaded.

In the particularembodiment-shown in Figs. l2 and 13, the freefend 'of' theguidefar-m 34 has a keylike bentup extension 26, andV theV supporting spring Z7, that is semicircular in its supporting portionand the initial tension of which is increased by providingthe'bends 28 in its prole, carries an-'extension'29 arranged at an angle to theI keylikef-extensionrrZ ofthe .guide arm. The extension IZ9-se`rves2as a` handle which, upon being depressed towardsY the extension 26,'.easily' sets free the top roll shaft with? the top-rolls.

At the'ordinary'operating pressure, the top portion of-'the retaining spring '27 that may, for example, be fastenedY totheguidefarml by means of rivets Sil-will contact the bight portion 31 of the guide arm, thus preventing anyundue strain onthe retaining spring.

By embossing'the up-drawn 'edges 32 of the guide arm 34 to a sem'icircular shape, a'cup 33inay be formed to hold the weightingsprings (not shown).

Fibre liiow usually occurs from the suspension end to the free end of the guide arm. In case the pendulum-like movement is not employed,;the guide arm may also be assembled to havethe-tibre flowing in the opposite direction.1

It is believed that the .construction and'function of the forms shown ofthe device according to my invention will be understood from the foregoing detailed description thereof. It is `a feature of theinvention that the guide arm consists of .a preferably single profiled body form ing the lower support of the weighting means, whereby one end of the'guide' arm encompasses ina pivotal way a carrier' pin 'or a similar member fastened to the supporting unit. The bottom' of' the guide arm is tted with a supporting spring that is'preferably inserted in "an abutment and designed to'hold the shaft of the top rolls. The supporting spring is preferably so mounted on the guide arm, with respect to the abutmentlike free end of the latter, that the line ofA contact between the'spring and the shaft of thetop roll lies onsuch portion of the cylindrical sur face of the top rollsshaft as is opposite to the bottom roll. This prevents :any unfavorable influence of the pressure forces exertedbythe loading spring upon the supporting spring.

The guide arm may consist, according to the invention, of an embossed and punched piece, such as a profiled sheet metal piece; adie-cast` bodyg'or a proled body made of plastic material that'^is"deforma'ble when hot.

The advantagesof the device of my invention will also be clear from the foregoing -detailed description. Essentially, these advantages center about the following features. There willbe a reduction of the specific surface pressures. Thefself-aligning of the top rolls parallel to the axis of the'botton rolls will be guaranteed even though it wouldnot be possible to place the supporting unit, while mounting same, in a position exactly perpendicular to the axis ofthe bottom rolls. An unfavorable inuence of the weighting` pressure upon the elastically formed parts of the shaft holders to the-top rolls will be avoided.

It will be apparent that while I have shown and described mv inventionin preferred'forms, many 'changes and modifications may be made without departing from the spirit of the invention defined in the following claims.

I claim:

1. In a .supporting 'and weighting device for the top rolls of drawing mechanisms of textile machinery, wherein a supporting unit extends over 'at least one pair of top rolls and a shaft is provided for each existingpair of top rolls, at least a single guide arm, atleast a single guide arm support secured to said-unit, resilient loading means, and at least a ysingle supporting spring, said guide arm supporting said loading means,'one end'of the Vguide arm being pivoted on the guide-arm support, the guide arm forming near its other or free end an abutment, said supporting spring 'ittingiri the abutine'ntandholding the said shaft.'

A2.v In the device according to claim 1, a pin serving as 'said 'guide ariirsupport,said end of the guide arm at least partly enclosing the supporting pin for swinging motionsof the guide arm.

3. In the device according to claim 1, wherein bottom rolls are provided, said supporting spring being arranged so that the line of its contact with the top roll shaft faces the bottom rolls.

4. In the device according to claim 1, a pin serving as said guide. arm support, said end of the guide arm being saddle-shaped and at the same time shaped so as to at least partly enclose the supporting pin for swinging motion of the guide arrn.

5. In the device according to'claim 4, said saddle surface being medially inwardly-curved and contactingxthe supporting pin along a circular line.

6.y Inthe device according to claim 1, a pin serving as said guide arm support, said pivoted end of the guide arm being claw-shaped, the fingers of the claw alternately enclosing the supporting pin from above and below.

7. In the device according to claim 1, said pivotal end of the guide arm being formed to contact the guide arm support for a swinging fand a pendulum-like motion. of the guide arm.

8. In the 'device according to claim l, the supporting unit havingin cross. sectionand operating position the shape of an inverted U, the guide arm'being provided on the side looking'towardthe web of the U with at least one stud to support at least one weighting spring serving as said loading means', .theweighting spring .bearing against the web'of the U.

9. In Ithe device-according to claim 1, a stop pin being p'rovided'in the'supporting Unit, the guide arm being pro-A vided withwings adapted to strike against the stoppin when'said unit is liftedyand thus to prevent falling-out of the 'guidearm fromthe'supporting unit.

10. In the device'according'to claim l, the abutment having. the-shapeof .a 'half sleeve and being provided with flaps', the -supporting'spring being shaped and arranged to` bear upon said iiaps.`

11` Inthe' de'vicefacco'rding to' claim 1, the abutment having fthe' shape-'ofy a half 'sleeve and being provided with apertures `-andf'portionsbent'away, said apertures and portions receiving the supporting'spring. i 12. In the device according yto claim 1, the supportingunit-having'in cross section and operating position the shape'ofa channelof inverted U-form, the side walls of' the channel having inwardly -berit edge portions, the sides of the "guide'arm'contacting, upon unloading of the drawing mechanism, said edge portions.

13. Inthedeviceaccording to claim l, the' supporting unit having in cross'sectionfand 'operating position the shape of a channel of inverted U-form, said channel beingprovided at thev forwardend with a downwardly directed wall, the'said Ywall having an inwardly bent edge, the guide arm terminating at the forward end in an upwardly extending portion having an outwardly directed edge, theiatter edge resting upon the former'edge when the drawing mechanism isi unloaded.

14. In thegdevice according to claim 1, the guide arm having at the free end a keylike extension, the supporting's'pring forming. a sernicircular support portion and terminating in an extension-forming an acute angle with the first named `extension and serving as'a handle.

15. In the device according to claim 1, wherein there are pairs of' rolls, -saidpivotal end of the guide arm being formed -to contact the guide arm support for a swinging motion of the guide arm, the guide arm being mounted in the supporting unit for the iibre to pass through the pairs vof rolls 'in the direction from the'free end of the guide arm to the pivotal end.

16. I n the device Vaccordingto claim 1, the supporting spring having acurved portion, said portion bearing against the shaft.

References Cited in the tile of this patent UNITED STATES 'PATENTS Number l Name Date 2,100,139 Honda Nov. 23, 1937 2,306,849 Toenniessen Dec. 29, 1942 2,492,082 Woods a Dec. 20, 1949 2,508,964 Naegeli f May 23, 1950 2,597,850 Batista May 27, 1952 2,601,705 Stahlecker July 1, 1952 2,644,988 Haythornthwaite et al. July 14, 1953