US2746688A - Thread guide for winding machines - Google Patents

Description

A. BRUGGER THREAD GUIDE FOR WINDING MACHINES May 22, 1956 4 Sheets-Sheet 1 Filed March 30, 1954 May 22, 1956 A. BRUGGER 2,745,638

THREAD GUIDE FOR WINDING MACHINES Filed March 30, 1954 4 Sheets-Sheet 2 May 22, 1956 A. BRUGGER THREAD GUIDE FOR WINDING MACHINES 4 Sheets-Sheet 3 Filed March 50, 1954 A. BRUGGER May 22, 1956 THREAD GUIDE FOR WINDING MACHINES 4 Sheets-Sheet 4 Filed March 30, 1954 THREAD FOR WINDING MACHINES Albert Briigger, Villeurbanne, France Application March 30, 1954, Serial No. 419,821 Claims priority, application France March .31, 1953 13 Claims. (Cl. 242-43) This invention relatesto thread guides having. an automatically variable stroke for winding machines, particularly cop winding machines.

In order to obtain cops with conicalends'in cop winding machines, there must be imparted to the thread guide, which effects a straight traverse movement with respect to the cop body, an automatically diminishing stroke, which ordinarily is in relation with the increasing thickness of the thread coil on the cop body (coneor cylinder).

The present invention has as its object the provision of a control mechanism for the automatic reduction of the stroke of the thread guide, which is of simple construction and permits all adjustments required in practice to be easily efiected.

A further object of the invention is theprovision of a thread guide which does notrequire any cam discs, guiding rolls or other delicate control elements or arrangements.

According to the present invention the movement which ordinarily initiates from a reciprocating memberhaving a constant stroke, is changed into an oscillatory movement of constant amplitude imparted to a pivoting lever, which is operatively connected to the thread guide to produce a straight stroke of this latter, the pivoting lever,

on the one hand being slidably guided in-an articulated member and on the other hand hingedly connected to a control arm which, in operation is automatically pivoted with respect to said lever in such manner that it imparts a stroke to the thread guide which is reduced in accordance with the increasing thickness of thecop.

Other objects and advantages 'oftheinvention will become apparent from the following description of preferred embodiments thereof, reference being made to-theaccompanying drawings, inwhich:

Fig. 1 is a fragmentary sectional perspective view of a first emb odiment,

Figs. 2 and 3 are a top view and a side view respectively, partly drawn in section,

Fig 4 is a vertical section of the support ofthe thread guide, drawn to a larger scale,

Fig. 5 is a fragmentary sectional, perspective view of a second embodiment;

Figs. 6 and 7 are each a top view to Fig. 5, atthebeginning of the winding operation and at an advanced stage thereof, respectively, 1

Fig. 8 is a side view to Fig. 5, an

- United States PatentO Fig. 9 is a rear view of thethread guide support, drawn to a larger scale.

In Fig. 1 reference numeral'2 designates the machine frame having a pivoting bracket 4 mounted on a horizontal shaft 3 and carrying the thread guide. The U- shaped bracket 4, the two arms of which receive the shafts 3, comprises in the middle portion of its base a'vertical' 2,746,688 Patented May 22, 1956 ICC ing bracket 6 and bearing against the bobbin body 30 so as to constantly remain in the appropriate position for the winding operation. This bobbin body 30, which is rotatably mounted on a spindle or on pivots carried by the frame 2 may be a cone, as shown in Fig. 2, or a cylinder, as owing to the axis5 of the articulation, the carrying bracket 6 may take the required position at the pivoting bracket 4, so that the feeler roll 12 always bears against the bobbin 30 according to a generatrix of the bobbin body.

The support 9-for the thread guide 10, traversing on the pair of bars 7, 8 is connected with the upper end of: a stationary control arm 13, provided, to this end, with a spherical head 14 (Fig. 4) engaging a cylindrical bore115 of the support 9. The control arm 13 is adapted toswing, i. e. to change, its direction with respect to the support'9 of the thread guide 10, and to longitudinally move within the said bore 15.

The lower end of the control arm 13 is hinged by means of an extension 16 to a horizontal axis 17 carried by a head portion 18 of the pivoting lever 19, to which is imparted an oscillatory movement of constant but adjustable amplitude. The fulcrum of oscillation of this pivoting lever 19, is formed by a spherical bearing member 21 provided with a central bore freely traversed by the lever 19 and carried by a bearing 22. The latter is secured to a bar 23, so as to be adjustable in longitudinal direction. The bar 23 itself is secured at its ends to supports 24 longitudinally adjustable on transversally extending carrying bolts 25 secured to the frame 2.

The lever 19 receives its oscillatory movement from a traverse rod 26 to which is imparted a straight'toandfro movement from a cam disc.

The transformation of the straight movement of; the rod -26into the oscillatory movement of the pivoting lever 19 is obtained by an arm 27, longitudinally adjustableon therod 26 and projecting at right angles therefrom; this arm 27 is connected bymeans of a bolt 28 to the head portion 18 of the pivoting lever 19.

Thus the rod 26 effects itstraverse movement ofconstant stroke according to the arrows 29. The pivoting lever 19 is imparted an oscillatory movement of constant stroke accordingto the arrows 31 about a vertical axis formed by the spherical member 21. Thereby the lever 19 slides to-and-fro in the bearing member 21. The constant oscillatory movement of the pivotinglever 19 is transformed by the control arm 13, into a straight toand-fro movement, according to arrows 32, of the support 9 of the thread guide, whereby the extent of this traverse movement depends on the angular position of the control arm 13 with respect to a vertical line throughthe axis 17 in Fig. 3. With increasing horizontal distance between the upper end of the control arm 13 and the axis 17, the stroke of the support f the thread guide increases. According to the backward movement of the bracket 4 as indicated by arrow 33, i. e. in accordance with the increasing thickness of the bobbin 30 in contact with the feeler roll 12, the stroke of the straight traverse movement of the thread guide 10 decreases.

Thedescribed device otters numerous. possibilities of adjustment.

By displacing the bolt .23 cf the arm 27 011 the head 18 of the pivoting lever 19 the stroke of the thread guide 10 may be varied. To this end the arm 27 is provided at its forward end with a vertical bore 34 into which the bolt-.28 can be inserted, thus permitting reduction of the stroke of the pivoting lever 19 and accordingly ofthe thread guide 10. Similarly, it is also possible to reduce the stroke of the thread guide by. increasing the distance, between the fixed fulcrum of pivoting lever 19, i. e. of its spherical bearing member 21 and the hinge bolt 28 of the connecting-arm 27. his suificient'for this purpose to displace the rod 23 supporting the bearing 22 with the spherical bearing member 21 in the frame 2 more or less backwards, by corresponding displacement of both supports 24 on the rigid carrying bolt 25.

It is to be observed that the same way of adjustment permits change of the inclination of the conical ends of the thread Winding on the bobbin body. Another possibility of adjustment is to change the angle of inclination of the one bobbin end with respect to the other end, so that the two ends have difierent conicity. This can be achieved by displacing the spherical bearing member 21 laterally on the rigid rod 23 i. e. in longitudinal direction of the latter.

Further it is possible to produce bobbins not only with conical ends, but also with end faces perpendicular to the bobbin axis. To this end, the hinged connection between the connecting arm 27 and the head portion of the pivoting lever 19 is locked, by inserting a second bolt into the bore 34 of the connecting arm and into a corresponding bore of said head portion. Naturally in this case the fulcrum of the pivoting lever 19 is to be abolished, i. e. the connection between the spherical bearing member 21 and the bearing 22 to be disengaged. The pivoting lever 19 then follows the reciprocating movement of the rod 26, with respect to which it is in a right angled position. The stroke of the thread guide corresponds in this case to the straight line traverse movement, which is imparted to the rod 26 by the camor control-disc.

In other instances, i. e. when bobbins with conical ends are to be produced by means of the thread guide, the shape of the cam disc effecting the traverse movement of the thread guide must not necessarily correspond to this stroke, since it is possible to multiply the stroke by displacing the fulcrums of the connecting arm 27 and of the pivoting arm 19. It is therefore possible to use smaller camor control-discs than before, which consequently need less space and have a smaller inertia,

In the second embodiment, the numeral 40 in Fig. designates the machine frame and 41 the bearing pin of the pivoting bracket 42, carrying the thread guide; the numeral 43 designates the carrying bracket supported on the vertical pin 44 provided at the base portion of the bracket 42 and carrying the feeler roll 65. The numeral 50 designates a plate adjustably mounted on the bracket 42, 45 is the reciprocating rod, 46 are two carrying bolts on which the rod 47 can be adjusted by means of supports being provided with adjusting screws 66 for this purpose.

On the rod 47 the connecting arm 48 laterally extending therefrom is adjustable by means of a set screw 67. The connecting arm 48 is provided with a hinge bolt 49 serving as bearing pin for the pivoting lever 51.

52 designates the control arm hingedly connected to one arm of the pivoting lever 51. On the second arm the pivoting lever 51 is provided with a longitudinal slot 54 for engagement of a finger 55, which is adjustable on a support arm 56 in a manner not shown. The support arm 56 itself is adjustable in longitudinal direction on the reciproeating rod 45. The numeral 57 designates the support of the thread guide 58, which is longitudinally slidable on a guide rod 59 carried by the pivoting bracket 42. A spherical bearing member 62 is attached to this support 57 by means of two holders 61, the central bore through the spherical bearing member 62 holding the upper end portion of the control arm 52 of reduced diameter.

When the traverse rod 45 reciprocates in a straight line, the lever 51 is pivoted around the hinge bolt 49 by means of the supporting arm 56 carried by the rod 45, and by the finger 55.

The control rod 52 also actuated, moves the support 57 of the thread guide 58, whereby this support 57 is moved along the slide rod 59 arranged at the pivoting bracket 42, the support 57 serving in turn as a guide for the control rod 52. Thereby a simultaneous pivoting movement is imparted to the thread guide support 57 around the slide rod 59. This pi voting movement of the said support 57 is limited by the corresponding longitudinal side of the slit 60, formed between said plate 50 and the feeler roll 65. Here the support 57 of the thread guide 58 is guided parallel to the axis of the bobbin being wound, i. e. parallel to the axis of the cone 64, and not in the direction of the generatrix of the cone, as described in the first embodiment. The feeler roll 65 provided at the supporting bracket 43 which controls the pivoting bracket 42 and its associate members contacts the bobbin.

As in the previously described embodiment the stroke of the thread guide 58 can be adjusted as well as the inclination of the conical bobbin ends and further the angle of inclination of one bobbin end with respect to the other end.

The adjustment of the stroke of the thread guide is effected either by adjusting the finger at the supporting arm 56 or by adjusting the rod 47 along the support bolts 46 in order to move the hinge bolt 49 i. e. the fixed fulcrum of the pivoting lever 51 towards the finger 55 causing oscillation of this pivoting lever.

The change in the inclination of the bobbin ends is achieved by means of displacement of the finger 55 along the arm 56 and by displacement of the rod 47 along the carrying bolts 46, whereby the fulcrum of the pivoting lever 51 is displaced towards the rear or the front.

The adjustment of the inclination of one bobbin end with respect to the other can be effected by adjusting the carrying arm 56 along the reciprocating rod 45 and by adjusting the connecting arm 48 along the rod .7.

By means of the present invention synthetic as well as natural threads and filaments of all sorts can be processed.

It will be readily understood that the invention is not limited to the two described embodiments since numerous modifications and changes of the constructions herein shown and described may be made without departing from the spirit of my invention or the scope of the appended claims.

I claim:

1. A thread guiding mechanism for winding machines, said thread guiding mechanism having a variable stroke and comprising, in combination, a movable member effecting a transverse movement in a straight line, a pivoting lever, means connecting said movable member to said pivoting lever to transform the reciprocating movements of said member into oscillatory movements of said lever, a thread guide, a control lever pivotally connected to said pivoting lever and positioned to effect a reciprocating transverse movement of the thread guide, said control lever being pivotable relatively to said thread guide, and articulation means slidably engaging the other end of said pivoting lever, whereby said control arm is automatically pivoted with respect to said pivoting lever upon movement of said movable member, whereby gradually to decrease the stroke of the thread guide in proportion in the increase in diameter of the bobbin being wound.

2. A thread guiding mechanism according to claim 1, wherein said thread guide is carried by a support and wherein the control arm hingedly connected to the pivoting lever is on the other hand connected to the support of the thread guide by means of an articulation, permitting variation in angular and longitudinal positioning of the control arm with respect to the said support.

3. A thread guiding mechanism according to claim 1, wherein the pivoting lever is moved by means of a connecting arm hingedly connected to said lever and carried by a reciprocating traverse rod.

4. A thread guiding mechanism according to claim 1, wherein the pivoting lever is connected to a bearing member serving as a fulcrum of oscillation, said lever being slidably arranged with respect to the bearing member.

5. A thread guiding mechanism according to claim 4, wherein said bearing member is constituted by a ball having a central bore traversed by said pivoting lever.

6. A thread guiding mechanism according to claim 1,

wherein the thread guide is arranged on a support which is reciprocated along a straight guide rail and serves for hinged connection with said control arm.

7. A thread guiding mechanism according to claim 6, wherein said guide rail is arranged on a carrying bracket hingedly supported on a pivoting bracket mounted on the machine frame, the carrying bracket supporting a feeler roll cooperating with the bobbin in production.

87 A thread guiding mechanism according to claim 4, wherein said bearing member is adjustable in order to permit a displacement of the fixed fulcrum for adjustment of the stroke of the thread guide and of the angle of inclination of the conical bobbin ends.

9. A thread guiding mechanism according to claim 1, wherein the articulation point of the said connecting arm is adjustable on the pivoting lever to permit adjustment of the stroke of the thread guide.

10. A thread guiding mechanism according to claim 1, wherein the connecting arm is adjustable in longitudinal direction to permit adjustment of the relative angle of inclination of both bobbin ends.

11. A thread guiding mechanism according to claim 2, wherein the control arm is connected to the support of the thread guide by means of an articulation member formed on the latter and having an opening receiving the end of the control arm.

12. A thread guiding mechanism according to claim 1, wherein the pivoting lever acting upon the control arm is actuated by a reciprocating rod to which it is hingedly connected by means of a finger engaging a longitudinal slot of the pivoting arm permitting longitudinal movement of said arm relatively to said finger.

13. A thread guiding mechanism according to claim 1, wherein the thread guide support is arranged to slide along a guide rod rigidly fixed to the pivoting bracket and to turn about said rod in accordance with the increasing diameter of the bobbin, a feeler roll cooperating with the bobbin being carried by a supporting bracket hingedly mounted on said pivoting bracket.

References Cited in the file of this patent UNITED STATES PATENTS 1,473,172 Boyd et a1. Nov. 6, 1923 FOREIGN PATENTS 46,975 Germany May 10, 1889 89,068 Germany Oct. 30, 1896 230,073 Germany Jan. 16, 1911 17,512 Great Britain July 28, 1909 556,886 France Apr. 23, 1923

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