US2858993A - Stroke control mechanism for reciprocating thread guides of winding machines - Google Patents

Description

Nbv. 4, 1958 w. SIEGENTHALER 2,853,993

STROKE CONTROL MECHANISM FOR RECIPROCATING THREAD GUIDES OF WINDING MACHINES Filed 0012.28, 1954 2 Sheets-Sheet 1 illlillllllllllll V I 2 27 lllilllllllllII!IIIIIIIIIIM IN v5 TOR NHL TER 5/55! 7' 7611-7? vNov. 4, 1958 w. SIEGENTHALER 2,358,993

STROKE CONTROL MECHANISM FOR RECIPROCATING THREAD GUIDES OF WINDING MACHINES Filed Oct. 2s,' 1954 2 Sheets-sheaf. 2

Fig.5 I Fig.6

' INVEN TOR M41735? .S/AfI/Vf/fl'l? STROKE CONTROL MECHANISM FOR RECIPRO- CATING THREAD GUIDES OF WINDING MA- CHINES Walter Siegenthaler, Erlenbach, Switzerland, assignor to Maschinenfabrik Scharer, Erlenbach, Switzerland Application October 28, 1954, Serial No. 465,399

Claims priority, application Switzerland December 31, 1953 Claims. (Cl. 242-431) The present invention relates to a stroke control mechanism for reciprocating thread guides of winding machines. 1

It is an object of the present invention to provide means contributing to the construction of a very efficient and economically operable stroke control mechanism which permits variation of the stroke length of the thread guide during the winding operation.

A further object of the invention is to provide a stroke control mechanism of greatly simplified structure adapted for automatic operation during winding operations topermit production of packages of various forms.

An isosceles triangle may advantageously be provided, one leg or link being connected with a control arm, the other leg or link being in operative connection with the thread guide, whereby a guide, in the form of a lever, is provided as a connecting point for the two triangle links or legs, which lever is pivoted duringthe winding operation a in order to vary the height of the triangle;

In order that the invention may be readily understood an embodiment thereof will be described in more detail, byway of example with the aid of the accompanying drawings, which are limited to the parts necessary for the comprehension of the invention.

In these drawings:

Fig. l is an elevation of the stroke control mechanism according to the invention,

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connected by hinge means, the base line of the triangle.

corresponding to the connecting line between the hinge pivots or points at the two ends of transverse arms 15 and 16. With their other ends the two legs 18 and 19 are connected to a slide 21 by means of their connecting bolt 20, the slide 21 being movably arranged in a straight rail 22 of the two-armed guide lever 23 which is seated on a fixed support bolt 24. At one end of the guide Fig. 2 is a similar View, the guide lever for the con- I necting point of the two triangle legs being pivoted with respect to Fig. 1.

Fig. 3 is a view of an actuator mechanism for the said guide lever, drawn to a larger scale.

Fig. 4 is a top view of Fig. 3 partly sectioned, and

Figs. 5-12 show a number of package forms, each shown half in elevation and half sectioned.

Referring now more particularly to Figs. 1 and 2, there is disclosed a shaft 1 being coupled with the gear of the machine (not shown) and supporting a control drum 2 provided with a continuous cam groove 3. From shaft 1 the drive of the operating or winding spindle 6 is etfected by means of a pair of spur gears 4, 5. A cylindrical support or shaft 7 for the package A and B, respectively, is arranged on the said latter shaft. 8 designates the thread guide, arranged on a slide assembly 9, 10, 11, which is longitudinally slidable in a guide tube 12 having an upper and a lower slot 13 and 14, respectively The thread guide 8 projects from the said longitudinal slot 13, and two transverse arms 15 and 16 extend through the longitudinal slot 14, the first one of these arms is fixed to the slide assembly 9-11. The trans verse arm 16, which by means of a lateral part 17 is independently movable in the guide tube 12, also projects through the lower longitudinal slot 13 of the guide tube 12 and is in engagement with the cam groove 3 on the control drum 2. The corresponding end of the transverse arm 16 is fitted with a guide roll or follower. At the upper ends of the two transverse arms 15 and 16 the two limbs or legs 18 and 19 of the isosceles triangle are lever 23 a toothed segment 25 is formed, which is in,

engagement with a gear wheel 26 which, in turn, is rigidly connected with a gear wheel 27 over its journal, the gear wheel 27 meshing with a gear wheel 28.- According to Figs. 3 and 4 the distance between the support bolt 24 and the toothed segment 25 is smaller than in Figs. 1 and 2 and the only partially drawn arm of the guide lever 23 is larger than the arm having the toothed segment 25. The gear wheel 28 is rotatably arranged on an actuator shaft 29 between two setting rings 30 and 31 mounted on this shaft. At the setting ring 30 a pressure spring 32 is supported which acts on one face or side of gear wheel 28 in an axial direction. On the other side of the gear wheel 28 a friction clutch 33 is arranged withv which the setting ring 31 is associated. The gear wheel 27 is rigidly connected with a ratchet wheel 34 with which a ratchet pawl 35 mounted on a pin 36 can be brought into engagement. To this end ahandle 37 is fixed at the pin 36.

By means of the rotating control drum 2 a reciprocating movement of the guide tube 12 in an axial direction,

of a certain stroke length, is imparted to the transverse arm 16 engaging the cam groove 3. Over the said transverse arm 16 and the limb or leg 19, the slide 21 is reciprocated along the rail 22 provided at the guide lever 23, which movement is transmitted to the thread guide by means of the arm 18, the transverse arm 15 and the slide member assembly 11, 10, 9 the latter being arranged.

in the guide tube 12. According to Fig. l the guide lever 23 is situatedin a horizontal, i. 6. parallel position with respect to the guide tube 12. Thereby the stroke of the thread guide 8 corresponds to the stroke produced by the cam groove 3 of the control drum 2. The isosceles triangle movement is represented by dash and dot lines in its second end position, as well as the thread guide 8, I designating the corresponding stroke of the transverse arm and accordingly of the arm 18. In horizontal position of the guide lever 23 during the winding operation,- the cylindrical package A (seen also Fig. 5) is produced.

If the guide lever 23 is in the inclined position as shown in dotted lines in Fig. 2, the stroke control is given an operative condition in which the stroke of the transverse, arm 15 is reduced to the travel indicated by H, as will be readily understood. Due to successive actuation of the guide lever 23 from the horizontal position into the inclined position as shown in Fig. 2 a package B is produced, its two ends being evenly inclined. The actuation of the guide lever 23 is efiected by the actuation shaft 29 coupled with the gear drive of the machine, the gear wheel pair 28, 27 and by the gear wheel 26 meshing with the toothed segment of the guide lever 23. By means of the ratchet pawl 35 being brought into engagement with the ratchet wheel 34 connected with the gear wheel 27, by the handle 37, as shown in Fig. 4 in dash and dot lines an unintentional backward pivoting movement of the guide lever 23 to its initial position is prevented. The handle 37 holding the ratchet pawl 35 in its operative position remains in its corresponding position under the influence of gravity. When the handle 37 is pivoted into its initial or inoperative position, the guide lever 23 pivots of its own accord back into its horizontal position, which is formed by an abutment (not shown) serving as its support. The return movement of the guide lever 23 Patented Nov. 4, 1958,

oil bath, so that operation with high speed is possible without producing extreme wear.

As will be readily understood, the pivoting movement of the guide lever 23 -can be effected with other means and also in another way, for instance the support bolt 24 can be adjustably arranged withrespect to the longitudinal direction of the guide lever 23'.

Thus it is the possible to produce also packages of other shapes, for instance the packages C-H according to Figs. 7-12. The package Caccording to Fig. 7 is provided at both of its ends with a tapered conical portion C, while the remaining, id. the main, portion of the package is cylindrical. In order to form this package shape the guide levermust pivot from its rest position at the beginning of the operation and after the said conical ends have been shaped it must be fixed in that position, so that the isosceles triangle 18, 19 subsequently operates with a constant stroke. In Fig. 8 a package D of bulged shape is shown; the production of this shape being such that the guide lever 23 is given a pendulous pivoting movement during operation. Fig. 9' depicts a package E which is provided with conical hollow ends e. With respect to the generatrix of the cone of the package B according to Fig. 6, the inverse case is present here, to which end the guide lever 23 must be pivoted from its rest position in a direction opposite to the one aforementioned. Fig. 10 shows a correspondingly conical package F arranged on a conical support 38, its ends being inclined with respect to each other in opposite directions. In contra-distinction to this, the package G shown in Fig. 11 is inclined only at its one end, whereas the other end constitutes a plane perpendicular with respect to the surface of the conical support 38. In order to produce this package with its inclination on one side,the support bolt 24 of the guide lever 23 is adjusted in such a manner that its axis coincides with that of the connecting bolt 20 of the pair of legs or links 18, 19when the said connecting bolt 20 has reached its outer end position. Fig. 12 shows a package H tapered at both ends, but with different angles of conicity.

Various changes and modifications may be made without departing from the spirit and scope of the present invention and it is intended that such obvious changes and modifications be embraced by the annexed claims.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is.

1. A stroke control mechanism for a reciprocating thread guide of a winding machine comprising a guide rail for said thread guide, a first slide member and a second slide member movably arranged on said guide rail, rotary cam means engaging said first slide member,

said second slide member being operatively connected to said thread guide, a pivotable control rail adjustably arranged with respect to said guide rail, a sliding block movably arranged on said control rail, and two link members articulated to said sliding block and connected each to one of said slide members, whereby upon rotation of said .cam-means areciprocatory movement of constant stroke length is imparted to said first slide member and a reciprocatorymovement of variable stroke length depending on the position of said control rail is imparted to said second slide member.

2. A stroke control mechanism according to claimv 1, said control 'rail and said sliding block being arranged for pivotal movement relative to said guide rail for adjusting the stroke length of the thread guide during winding operation.

3. A stroke control mechanism according to claim 2, Wherein'the adjustment of said control rail is etfected by automatically operating means, said latter means being connected to the gear drive of the machine.

4. A stroke controlmechanisrn according tothe claim 3, wherein said control rail forms a pivotable lever.

5. A stroke control mechanism fora reciprocating thread guide of a thread, winding machine, comprising first guide means for slidably receiving said thread guide, a plurality of first slide meansoperatively connected to saidythread; guide and arranged for sliding movement within said firstguidemeans, second guide means spaced from said,firstv. gu ide means and provided with second slidemeans, link;means interconnecting said first guide means with said second guide means and pivotally connected to said first and-second slide means, respectively, and drive means operatively connected to one of said first slide means and'constructed to cause reciprocation of said first slide means and said thread guide along said first guide means, and control means operatively connected to said link means and adapted to vary the angle between, said second guide means relative to said first guide means and the distance between said one of said first slide means and another of said first slide means thereby changing the stroke length of said thread guide.

References Cited in the file of this patent UNITED STATES PATENTS 2,372,136 Swift et al. Mar. 20, 1945

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