Патент USA US2132299код для вставки
0m. 4, 1938. ‘ J. F. JACKSON 2,332,299 DRAWING MECHANISM FOR TEXTILE SLIVERS OR ROVING'S I Filed June 16, 1957 2 Sheets-Sheet l IN VEN TOR. - BY ‘ A TTORNEYS. Uct. 41‘, I?!‘ J. F. JACKSON ' 2,132,299 DRAWING MECHANISM FOR TEXTILE SLIVERS OR ROVINGS Filed June 16, 1957 2 Sheets-Sheet 2 / / // 4N VEN TOR. b/a?é500 "mm ATTORNEYS. Patented Oct. 4, 1938 4 f UNITED STATES‘ PATENT ()FFlCE DRAWING MECHANISM Foa TEXTILE SLIVERS on Rovmos John Frederick Jackson, Pawtucket, it. 1., as signor to H & B American Machine Company, a corporation of Maine Application June 16, 1937, Serial No. 148,524 3 Claims. (01. ’19_1s1) This invention relates to drawing mechanisms for textile slivers or rovings; and has for one of its objects the provision of an improved con,structionlof drafting apparatus utilizing belts 5 or aprons in which each of the individual belts or apronsemployed for supporting and carrying the'strand of sliver or roving from one pair of drawing rolls to another, are of an endless construction. 10 I a 1 all the belts may be applied in an endless form. Another object of the invention is to provide a sliver feeding mechanism of the above type which is removable bodily as a unit from its support on the machine whereby the endless belts serve 5 solely tofmaintain the parts in assembly when the unit is taken out of the machine. With these and other objects in'view, the in vention consists of certain novel features of con Another object of the invention is to provide simple and improved support means for guiding the belts whereby they may be easily removed ‘and replaced at will without interrupting the normal operation of the other sections of the struction, as will be more fully described, and 10 particularly pointed out in the appended claims. In the accompanying drawings: Fig. 1 is a vertical sectional view looking at the end of the drafting rolls, and showing the roll ' ' machine or necessitating stoppage of the com- stand in which there is applied thereto and posi- 15 plete machine with the consequent loss of production and expense which has heretofore been the case during use of the prior art belt mechanisms employing belts or aprons the ends of go which are cemented together after being put in tioned in operating position one form of unit drafting mechanism embodying my invention; Fig. 2 is a‘ front longitudinal sectional view taken on the line 24-2 of Fig. 1 showing my feed ing device 'and‘with their rotatable members for 20 place. ' driving the belts and the manner in which the Another object of the invention is to provide a device which'is readily attachable and detachable on. the machine and applied between adjacent 25 pairs of drawing rolls whereby the assembly of latter are vdriven; ' i ' ' - Fig. 3 is a front longitudinal sectional'view taken on the line 3—3 of Fig. l; > Fig. 4 is a longitudinal. sectional view taken on 25 endless belts and their associated rotatable driv- the line 4-44 of Fig. 1; ing' members may be bodily removed as a complete unit from the machine. ' Another object of the invention is to provide I Fig. 5 is a perspective View of a belt mecha nism embodying my invention; ' FigfG is a' perspective view of one of the side 39 a-unit device containing endless feeding belts, driving ‘members, and a guide support therefor that’ is so constructed to be completely devoid of ‘any mechanism requiring attachment to 01' having embracing relation with a ?xed driving 35 roll on the machine to be upheld thereby. ‘ plate members of the cradle frame; Fig. 7 is a perspective view of the guide sup port for the Upper and. IOWBI" belts; 30 Fig- 8 is a perspective View of the companion side plate of the set of the cradle frame shown in Fig. 5; ’ ' Another object of the invention is to provide Fig. 9 is a modified ‘form of side plate of a a device of the above type constructed with a plurality of sets of endless belts each set of which has cooperating runs'between which the cradle ‘frame which may be used in place of that shown in Fig, 6; and " Fig- 10 is a modi?ed form of guide Support for 40 sliver or roving travels in which the arrangement is such that one of the rotatable members for driving one of the belts of each set has positiveldriving connection with a single elongated continuous drive shaft disposed beneath the parin on ticular driven rotatable member for the respective belt. '- Another object of the invention is to provide a‘ device so constructed that spaced sets of guide supports are provided about which run the for50 ward bight ‘of each of the endless belts travels in ‘which the guidesupports of each set are carried by separate cradle frames which guide the movements of each set of belts and are detachably supported solely by the removable rotatable 55 cylinder members for driving the belts whereby the ‘upper and lower belts and adapted'for ‘use with the side plate ShOWn in Fig- 9 Heretofore, in the construction and operation of the Common forms of apparatus of this class utilizing endless belts 01’ aprons, Such members have been usually guided and supported by a frame or cradle having side plates for con?ning the belts and rigidly J‘Oined tOgetheI‘ by Suitable rods and guide bars ‘00 provide a unitary Struc ture. This frame or cradle, furthermore, is com monly provided with a pair of detachable bars or rods at its forward portion over which the front loop of the belts is guided in close proximity to the drawing rolls. However, in the machines employing this prior arrangement the lower roll carrying the bottom belt has. usually consisted of 35 40 45 50 55 2 2,132,299 a single elongated ?uted roll which ordinarily ex tends substantially the entire length'of the ma chine and is made up of a series of sections joined together at their ends for driving connection. The upper roll usually is short and formed with a pair of spaced belt engaging portions, this roll is loosely mounted at its ends in the usual cap bars and consequently is easily removable therefrom to permit insertion in the loop of the upper belt, 10 which thus may be initially made endless by cementing of the ends together. Owing to the great length and unitary construction of the lower roll around which the bottom belt runs, it is impractical to employ a previously fabricated 15 endless apron or belt in this location, thus mak ing it necessary to cement the ends of the belt in place each time it is renewed, which process requires stopping the machine with the attendant loss of production; and in order to provide a con 20 struction which is particularly suitable for such drafting apparatus and to improve and simplify such belt mounting construction, I have pro vided a unit device of a “?oating” type of con struction employing an exterior driving roll for 25 the belt cylinders and wherein a plurality of pairs of belts are arranged separated in spaced positions with each pair in cooperating relation and guided between a cradle device so arranged that the side plates thereof guide the belts against 30 lateral slipping and carry the guide supports for the forward loops of the belts, in which such cradle is constructed to receive and be supported entirely by the insertable driving rolls for the endless belts and not to rest on and be carried 35 by any single ?xed continuous roll extending the entire length of the machine, as has heretofore been the previous arrangement with the result that endless belts could not be used on‘the lower roll, thus preventing the raising and removal of 40 the entire assembly as a unit; and the following is a more detailed description of the present em bodiment of this invention, illustrating the pre ferred means by which these advantageousre sults may be accomplished: 45 ‘ With reference to the drawings, I6 designates one of a series of spaced roll stands which is well known construction in the art each having The rolls I3 and I6 are each of a sectional con struction in which a plurality of short sections are keyed together at their ends to provide a sin gle continuous elongated shaft which is jour naled at a plurality of intervals in the roll stands and extending the entire length of the machine, as usual, the rolls being positively driven at dif ferent speeds by suitable gearing (not shown) at the end of the machine, at rates whereby the draft on the yarn, sliver or roving between the 10 successive rolls is increased. The rolls I3 and I6 are each formed with ?uted portions 20 and 2| respectively, at intervals along their length and are alternately arranged in spaced relation with smooth cylindrical spacing portions (not shown)’ of a lesser diameter therebetween, as is the common construction in the art. A driving roll 24 also in the form of asingle con tinuous shaft of similar elongated sectional con struction as the lower rolls I3 and I6 andextending 20 the entire length of the machine, is provided at intervals with a plurality of spaced bearing por tions 25 which are journaled in the forward re duced portion of the block‘ I5 in the roll stands. By loosening the nut IS, the rolls I6 and 24 being 25 journaled in the common bearing block I5 thus may be moved with the block and simultaneously positioned at desired adjusted‘distances towards or from the lower front roll I3. Positioned on the driving roll 24 between the successive bear 30 ing portions 25 and at spaced'intervals there along are a plurality of enlarged hubs 28 and 29 which, as shown in Fig. 3, form a rest or sup port members for purposes which will hereinafter be described. Located at intervals on the driv 35 ing roll 24 and between the pair of hubs 28 and 29 is positioned an enlarged fluted hub portion or gear 30, the diameter of this gear being greater than the diameter of either of hubs 28 and 29, and employed for purposes to presently appear. 40 This gear and the hubs 28 and 28 may each be formed integral with the shaft of the roll 24 or they may comprise separate parts which are ?xed in position on the roll. As illustrated in Fig. 2, the driving roll 24 is located below the line of 45 travel of the fibers of sliver or roving, which is designated at S by the dot and dash lines so as to a standard I I provided with a suitable base por tion (not shown) whereby each of the stands may be rigidly mounted on a suitable support of the be tangent to the peripheries of the ?uted por-’ frame of the machine. As shown’ in Fig. 1 each roll stand is provided with a top platform member mit my particular belt mechanism which will presently be described and embodying the pres ent invention, to be mounted above the driving roll 24 and in a superposed cooperating relation thereto without changing the relationship of the line of travel of the yarn, as indicated by the broken line S, whereby the latter may travel be tween the cooperating surfaces of a pair of juxta posed belts of my intermediate belt unit. 'As shown. in Fig. 2 of the drawings, the block 60 I5 has a rearward extension 30 thereon in which is mounted a pivot rod 3I to which may be ?xed, I2 having its forward end extending upwardly to form the usual journal for the front bottom rolls 55 I3. At the rear of each of the roll stands and on the platform I2 is adjustably secured a bear ing block l5 on which is journaled the bottom back roll IS. The rolls I3 and I6 may be formed either with a smooth cylindrical outer surface or 60 of a ?uted construction, as desired. This block I5 is formed at its bottom with a suitable longi tudinally extending channel for inter?tting seat ing engagement with a cooperating tongue por tion on the upper face portion of the platform I2 65 of the roll stand, as is the usual construction in the art. The forward portion of this block I5 is of reduced thickness and at the rear of this portion is a bolt I‘! the lower end of which ex tends through a slot I8 formed in the platform I 2 70 of each roll stand and having a nut I9 threaded thereon .and engaging at its upper end the lower face of the platform I2, as is well known con tions 20 and 2I of the lower rolls I3 and I6 re spectively, and the arrangement is such as to per as by suitable set screws, a plurality of cap bars 33. Ordinarily, there are more cap bars than roll stands, a cap bar being provided for each roll 65 stand I0 and others being positioned intermediate of the stands, the bars being arranged for for ward pivotal swinging movement over the‘ rolls I3 and I6. As illustrated, each cap bar is of ex tensible construction, it being ‘formed of two sec; 70 tions 34 and 35, and connected by a telescopic’rod 36. The rear section 34 is shown as being pro struction in the art, for permitting adjustment vided with oppositely disposed vertical arranged of the block I5 and the lower back roll I6 to channels or slots 31 having open ends at the top face of the cap bar and extend downwardly there 75 75 wards and from the lower front roll I3. 3 21,132,299 from for loosely receiving trunnions or journals 38 at. the ends of the rear upper rolls 49. The channels 31 may be provided as. a deep cut in the top face of the arms 33 or in the opposite side faces thereof as separate channels extending in wardly from the sides of the cap bar arm, in which latter case they extend in a vertical direc tion throughout the entire depth of the-arms. Similarly,.the front section 35 is provided with op positely disposed vertically arranged slots M po sitionable above the lower roll l3 and form guides for loosely receiving the trunnions or journals 42 of the front top rolls 43, the rolls 49 and 43 being formed with spaced sections (not shown) which ii. are customarily providedv with a leather or cork outer covering and adapted to rest upon the un I tit 34 ... . derlying ?uted sections 29 and 2! of the bottom rolls l3 and M respectively.‘ The above described parts ‘have been shown in their conventional ar rangement without the usual weighted saddle means for properly weighting the upper rolls 49 and 43. and maintaining them in place, as is well known in the art, such means forming no partic ular feature of the present invention. At a point intermediate these channels 3? and ill the cap bar 33 is thickened as at 55 to provide a lug which extends downwardly into close proximity to the lower drive member 24, and vertical channels I16 formed in this lug 45 are oppositely disposed and extend throughout the entire depth thereof at a location above and in vertical alignment with the axis of the driving roll 24. These channels 46 and 59 form guides in which ride and are loosely supported the trunnions of the front belt guide members and the belt driving rolls of my draw ing mechanism, as will be presently more fully described. ' As illustrated in the drawings, there is shown disposed between the sets of nip rolls one form 40 of apron or belt mechanism for feeding and con ducting the sliver or roving to the drawing rolls, and according to the present invention it com prises a pair of endless belts or aprons 5i and 52 which are positioned on to encircle a pair of rotat Wi able driving cylinders or rolls 54 and 55 respec tively, each of which belts has insertable within its loop its. respective driving roll while the for ward end of the belts 55 and 55 are positioned about and run over a'pair of front guide members 51 and 58 respectively. The rolls 54 and 55 for the upper and lower belts have provided at each end journals or trunnions 65 and GI respectively, ‘ adapted to loosely fit within and be removably mounted for sliding and rotary movement in the vertical slots 46 formed in the oppositely disposed faces of adjacent cap bar arms 35. The rolls 54 and 55 are of similar construction of which the former is an idler roll, while the latter is adapted to be positively driven by the roll 24, the rolls 54 and 55 each are provided with a pair of spaced belt-driving sections 52 and 63, and an intermedi ate hub section 55 of reduced diameter, said sec tions 62 and 63 each being formed with cylindrical end portions 65, 65’ between which lies an inter mediate portion 65 which is provided with a roughened surface formed either by‘ knurling, milling or ?uting the same. Located intermedi ately between the belt driving sections 52 and S3 of the lower roll 55 is a driving hub or gear 58 70 which is of approximately the same diameter as that of the belt driving sections of this roll so as to be adapted for intermeshing with and have positive driving connection with the driving gear 29 of the lower elongated driving roll 24 when 75 the belt mechanism assembly is mounted in proper operating position in the machine, as will be hereinafter described. As illustrated, the guide frame for each set of belts 5! and 52 is loosely mounted on the lower rotatable cylinder member or roll 55 and com prises a pair of side plates ‘l9 and ii and which may be connected by suitable strut members (not shown) and rigidly secured to the side plates to provide a unitary structure. The bottom edges of each of the side plates 75 and H are recessed, as 10 indicated at ‘M and 15 respectively, so as to» per mit them to ?t over and embrace the reduced portions 55 and 77 respectively, of the lower roll 55 employed for driving the bottom belt 52. The side plates in and ‘II also have their top edges Ii provided with upper recessed portions 79 and 89 to loosely receive and locate the top rotatable cylinder member or roll 5! by which the upper belt 5| is driven. ' The side plates 19 and ‘H each have positioned 20: at their front portion a pair of guide bars 51 and 58 for the forward loops of the belts and which extend laterally between adjacent plates of each set and are integrally secured thereto in any suit able manner, as by screws 8!. Provided at the 25 ends of each of the guide bars 5'] and 5B, are the projections 89 and 85 and are each formed with ?at top and bottom faces which ?t into a pair of spaced notches 86 and 81 having flat walls and formed by slotting the front end faces of each of 30 the plates "l9 ‘and ‘ii. The guide bars 57 and 58 after having their projections 84 and 85 inserted in place in the notches 86 and B‘! respectively are thus positioned in spaced relation one to the other and are encircled by the forward loops of the belts 5i and 52 respectively, as shown in Fig. 5. The rear face of the plate 19 is provided with a rearwardly projecting hook portion 39 to receive the journals or trunnions at the ends of a clearer roll 39 to engage the outer surface of a plurality 40 of lower bolts 52. In. accordance with this construction, the screws 85 at each end of the guide bars thus rigidly secure them to the side plates 79 and ‘H so that the entire assembly may be simultaneously 45 withdrawn as a unit from the cap bars 33. As shown in Figs. 7 and 9, the guide bars 57 and 55 are each formed of relatively wide bar stock the front or leading edge of which is beveled and curved in order to provide a smooth tapered 50 rounded surface over which the inner circumfer ence of the forward run of each of the belts travels. The guide bars 5] and 58 are shown as being of similar construction and thus may be interchangeable one with the other in the side 55 plates ‘it! and ‘l i. The spacing between the guide bars 5'! and 58 always should be, however, sub stantially greater than the thickness of the belts 5i and 52 so as to accommodate the regular pas sage of the sliver or roving between the cooperat 60 ing surfaces of the belts without preventing the proper functioning of the latter. Referring to Figs. 10, 11 and 12, the construc tion there shown comprises a modi?ed form of cradle device embodying my invention in which 65 the side plate 99 corresponds to the side plate 19' of the other device previously described, but in the modi?ed form the front edge of the side plate 99 is shown as being provided with a projection 9| having shoulders 92 and 93 for positioning a 70 pair of guide bars 95 and 96, the ends of the lat ter being provided with projections 97 and 98, and the bottom and rear faces of the projections 91 and the top and rear faces of the projections 98 meeting rearwardly at a right angle corner 76 4 2,132,299 whereby they may be positioned into seating en gagement in a right angular corner provided by the front edge portion and the shoulders 92 and 93, above described. When so mounted the pro jections 9!" of the plates 90 serve to space the guide bars 95 and 96 so as to provide sufficient clearance for cooperating movement of the belts 5! and 52 respectively. The other side plate (not shown) in each set and employed in the modi 10 ?ed construction of the apparatus will be formed similar to the inner side plate ‘H shown in Fig. 9, as previously described, but will differ therefrom ' 2. In a drawing mechanism for textile slivers or rovings utilizing a pair of endless belts disposed one above the other in cooperating relation for conducting the slivers or rovings, and upper and lower removable rolls driving the said belts, the combination of a frame for laterally guiding the belts composed of spaced parallel side plates unit ed together into a rigid unitary structure by two cross-bar guide members for internally guiding the front loops of the belts, said plates having top 10 and bottom recesses to detachably receive said rolls in parallel cross-wise relation between said in that the front edge portion will be provided side plates, said cross-bar belt guiding members with the projection 91, as shown in the modi?ed being detachably secured at their opposite ends 15 construction of plate shown in Fig. 10, in place of the slots 86 and 81. It will thus be apparent that in accordance with the present invention, a construction of feeding device of the belt type is provided which has con 20 siderable advantages over any of the prior art to said side plates in spaced relation at the front 15 edge portions thereof, the opposite ends of each of said cross-bar members being provided with longitudinal projections having inter?tting rela tion with shoulders formed on the front edges of said side plates, each of said cross-bars having a 20 constructions commonly employed in the art, the arrangement of the present invention being such as to permit the belt driving rolls 4'! and 48 to be forwardly tapered front edge portion to engage removed simultaneously from its support in the rolls therefor in assembled position in the recesses in said frame to form a unitary demountable mechanism. 3. In a drawing mechanism for textile slivers or rovings utilizing a pair of endless belts dis 25 cap bar and to enable insertion or withdrawal of both cradles and the associated belts and guide bars and driving rolls as an entire unit assembly without the necessity for either stopping the com plete machine or of severing the lower belt as has heretofore been the practice. The foregoing description is directed solely to wards the construction illustrated,>but I desire it to be understood that I reserve the privilege of re sorting to all the mechanical changes to which 35 the device is susceptible, the invention being de?ned and limited only by the terms of the appended claims. I claim: 1. In a drawing mechanism for textile slivers 40 or rovings utilizing a pair of endless belts dis posed one above the other in cooperating relation for conducting the slivers or rovings, the com bination of a frame for laterally guiding the belts composed of spaced parallel side plates united together into a rigid unitary structure by two cross-bar guide members for internally guiding the front loops of the belts, said cross-bar belt guiding members being detachably secured at their opposite ends to said side plates in spaced 60 relation at the front edge portions thereof, the opposite ends of each of said cross-bar members being provided with longitudinal projections hav ing inter?tting relation with shoulders formed on the front edges of said side plates, each of said 2.! Cal cross-bars having a forwardly tapered front edge portion to engage the inner circumferential sur face of an endless belt. the inner circumferential surface of an endless belt, said belts serving to maintain the driving posed one above the other in cooperating relation, the combination of a pair of spaced parallel arm 30 members hingedly mounted at one end for move ment to and from a horizontal position with op posed channels, one in each of the oppositely dis posed sides of said arm members, said channels being vertical longitudinally in the horizontal 35 position ofsaid arm members, a pair of rolls driv ing the said belts and removably supported at their ends one above the other in said channels for rotation therein, a frame for laterally guid ing the belts composed of spaced side plates unit ed together into a unitary structure by two cross bar guide members‘ for internally guiding the front loops of the belts, said plates having top and bottom recesses to receive said rolls and be mounted thereon, said cross-bar members being 45 detachably secured at their opposite ends to said side plates in spaced relation at the front edges thereof, each of said cross-bar belt guiding mem bers having a forwardly tapered front edge por tion to engage the inner circumferential surface of an endless belt, said belts serving to maintain the driving rolls therefor in assembled position in said frame to form a unitary demountable mech anism removable as a unit from the channels in said arm members. JOHN FREDERICK JACKSON.