US2290391A - Strand winding device - Google Patents

Description

July 21, 1942; w. H; TAYLQR STRAND WINDING DEVICE Filed Nov. 8, 1941 2 Sheets-Sheet 1 v July 21, 1942. w. H. TAYLOR STRAND WINDING DEVICE Filed Nov. 8, 1941 2 Sheets-Sheet 2' INVENTOR. 2%

Patented July 21, 1942 I rice STRAND WINDING DEVICE Application November 8, 1941, Serial No. 418,373

3 Claims.

This invention relates to a device for Winding a strand on a bobbin, especially for the purpose of obtaining a strand mass on the bobbin having a tapered configuration at the end of said mass opposite the base of the bobbin.

One of the problems met in mechanisms for this purpose is lack of satisfactory control. For example, in mechanisms for the production of a straight taper, the absence of such control leads to uncontrolled irregularity of the tapered end, with resultant unmarketability or detraction from the marketability of the product.

It is an object of the present invention to devise improved mechanism to effect such adequate control. Further advantages and disadvantages will appear from the subsequent description taken in conjunction with the drawings, in which:

Fig. l is a plan View showing the parts in position at the beginning of the strand winding operation;

Fig. 2 is an end View corresponding to Fig. 1;

Fig. 3 is a side elevation;

Fig. 4 is a plan View showing the parts in position at or near the end of the winding operation;

Fig. 5 is an end view corresponding to Fig. 4;

Fig. 6 is a plan view, partly in section, on the line 66 of Fig. 3.

Various conventional strand winding machines are well known, wherein a traverse frame carrying traverse mechanism including a thread guide moves radially in relation to a bobbin mounted to rotate with and axially along a revolvably mounted arbor. In such conventional machines, a thread guide may be mounted on a bracket carried by a traverse rod having a horizontal axis. The rod is horizontally reciprocated by a shoe member which is given a horizontal reciprocating motion by a part thereof which rides in a groove of an eccentric wheel. The said eccentric wheel is pivotally or rockably mounted on a shaft which carries the traverse frame including the traverse bar, thread guide, and counterweight. As the strand mass builds up on the bobbin, the entire frame undergoes a radial movement actuated by the thread guide bearing against the said strand mass. The thread guide and traverse bar are therefore mounted, not only to reciprocate horizontally and axially in relation to the axis of the bobbin, but also for radial movement transverse to the axis of the bobbin.

The present invention may advantageously be applied to such conventional strand winding machines and therefore the mechanism and opera tion of the latter need not be described and shown in detail except in so far as to show the relation-' ship of the construction and operation thereof to the construction and operation of the present invention.

In accordance with said invention, a hollow conical member I is provided having an axis coinciding with the axis of the arbor 2 and bobbin 3 mounted thereon. This conical member I is mounted to rotate with the arbor 2 and to move axially along the mandrel 35 and is adapted to impart this axial movement to the bobbin 3 mounted on the arbor 2. The conical member I has an internal surface 4 and an external surface 5. In order that the conical member I may be given its axial movement in consonance with the radial movement of the thread guide l8 and traverse frame 8 to produce the desired taper in the thread mass, means are provided which slidably engage each of the surfaces of the conical member. This means is mounted on the traverse frame 8 for radial movement therewith and, through the cooperation of this means and the conical member I the radial movement of the traverse frame 8 produces simultaneous axial movement of the said conical member I and bobbin 3. The means referred to may comprise a yoke H) having legs ll, I2 straddling the edges of the conical member I, the said yoke l0 being secured to the traverse frame for radial movement therewith and the yoke Hi may be provided with adjustable parts'slidably engaging both the internal and external surfaces of said conical,

member and being thereby adapted to move said member and bobbin axially along the arbor on which the bobbin is mounted simultaneously with the radial movement of the yoke member secured to the traverse frame for the purpose of securing the desired taper in the end of the upward mass opposite the base of the bobbin. As a result of the engagement of both faces of the conical member by the means, as for example a yoke or its equivalent, secured to the traverse frame, the bobbin 3 may be given a controlled axial movement along the arbor 2 on which it is mounted at a uniform rate free from any backlash or other uncontrolled movement tending to produce uncontrolled irregularity in the desired taper.

It will be understood that any such uncontrolled movement of the bobbin is reflected in an uncontrolled contour of the taper and, as already stated,

it is one object of the present'invention to over-- come this lack of control.

Referring now more particularly to the details of a particular embodiment of the principles of the present invention, certain parts ofa conventional strand winding machine are shown including parts of a traverse frame. These include a traverse bar and a bracket [6 carrying the thread guide H8. The traverse frame as a whole is pivoted to rock about the shaft which carries an eccentric wheel (not shown), which in turn imparts to the traverse bar l5 a reciprocating movement axially in relation to the axis of the bobbin, the frame carrying the conventional counterweight 2!, as shown more particularly in the end views shown in Figs. 2 and 5. The strand 23 is presented to the strand mass 24 on the bobbin 3 by first passing over a guide roll 22 and then through the thread guide l8 which bears against the strand mass. As the diameter of the latter increases during the winding operation, the traverse frame rocks outwardly and radially about its horizontal pivot 26.

To the drive shaft 25 of the said conventional machine there is secured the mandrel 35 by means of an integral dowel pin 26 having a threaded end 21, these parts engaging corresponding recessed portions in the said shaft. On this mandrel 35 there is mounted, to move slidably thereon, the hollow conical member I having a sleeve portion 23 carrying a slot 29 which engages a pin 30 on the mandrel to limit the movement of the sleeve 23 axially of the mandrel 35 and to cause the sleeve 28 to rotate with the mandrel 35. The axis of the conical portion I coincides with the axis of the mandrel 35 and said conical portion I has an inside sur-- face 4 and an outside surface 5. Into the cylindrical recess 3| in the conical member is frictionally driven one enlarged end of the bobbincarrying arbor 2, the major portion of said arbor 2 having a reduced diameter, as shown clearly in Fig. 6. From this portion of the reduced diameter a part is cut out to permit the mounting therein of a spring member 321 by means of the screws 33, the heads of which fall slightly below the surface of this reduced diameter portion of the arbor 2. By means of this spring mounting the bobbin 3 may readily be slipped over the arbor 2 and frictionally mounted thereon to rotate with the arbor conical member and mandrel, and to move axially along said arbor under the axial thrust of said conical member. The base of the bobbin may be separated from the conical member by the washer 36 which, if desired, may be made integral with the conical member.

In order to impart axial movement to the conical member, means are provided to engage both the internal and external surfaces thereof, which means, when given a radial movement actuated by the swing of the pivotally mounted traverse frame, causes the conical member to move axially along the mandrel 35 in such controlled fashion as to produce the desired controlled straight line taper in the end of the thread mass. The axial movement of the conical member necessarily causes similar axial movement of the arbor 2 and the bobbin 3 mounted thereon and the latter therefore undergoes a movement axially of the mandrel. The particular means shown in the drawings for imparting this controlled axial movement to the conical member is the yoke It). This may be formed of a metallic casting having the interior thereof hollowed out to form legs H, l2 which straddle the edges of the hollow cone. Pins 33, 38A pass through holes in these legs and are adjustably mounted by means of set screws 39, 39A. The ends of the pins are appropriately beveled so that beveled surfaces thereof simultaneously engage both the internal and external surfaces of the hollow conical member. The yoke member is adjustably secured to the plate 49 by means of a bolt 4| passing through the horizontal slot 42 in the lower part of the yoke II! and secured in a threaded hole 4 lA in the plate 40.

In the operation of the device, thread is presented to the bobbin 3 and is wound thereon in a so-called open wind produced by the reciprocating motion of the thread guid l8 carried by the bracket [6 mounted on the reciprocably mounted traverse bar l5. As the mass of thread increases in diameter, the thread guide I8, the bracket IS, the traverse bar [5, the plate 40, and the yoke member secured to the plate 43 (all constituting a part of the traverse frame) swing radially in relation to the axis of th bobbin 3 about the axis of th shaft 20 on which the traverse frame 8 and traverse mechanism are pivotally mounted. It will be understood that, while the thread guide has a combined axial and radial movement, the plate 49 and yoke l9 secured thereto have a movement only in one direction, to wit, a radial direction. This radial movement of the yoke member is converted into axial movement of th hollow conical member I, mandrel 35, arbor 2, and bobbin 3 mounted thereon, by means of the pin 38 engaging the internal surface 4 of the hollow conical member. The simultaneous sliding engagement of the internal and external surfaces of the conical member by means of the pins 38 and 38A controls this axial movement, whereby a uniform axial movement of the mandrel 35, arbor 2, and bobbin mounted thereon in the direction of the arrow shown in Fi 1 is secured and as a result the end of the strand mass requires the desired uniform taper, as illustrated in Fig. 4.

I claim:

1. In a machine for winding a strand mass on a bobbin, of the type wherein a traverse frame carrying a thread guide moves radially in relation to a bobbin mounted for coaxial rotation with and longitudinal axial movement in relation to a revolvably mounted mandrel; a hollow conical member having an axis coinciding with the axis of the mandrel and mounted to rotate with and move axially along said mandrel and being adapted to impart said axial movement to the bobbin, said conical member having an internal surface and an external surface; and means, slidably engaging each of said surfaces, mounted on said traverse frame for movement with said frame radially in relation to the axis of the bobbin, to move said conical member and bobbin axially simultaneously with said radial movement.

2. In a machine for winding a strand mass on a bobbin, of the type wherein a traverse frame carrying a thread guide moves radially in relation to a bobbin mounted for coaxial rotation with and longitudinal axial movement in rela tion to a revolvably mounted mandrel; a hollow conical member having an axis coinciding with th axis of the mandrel and mounted to rotate with and move axially along said mandrel and being adapted to impart said axial movement to the bobbin, said conical member having an internal surfac and an external surface; and a yoke having legs straddling the edges of said conical member, secured to said traverse frame for movement with said frame radially in relation to the axis of the bobbin, said yok having parts slidably engaging the internal and external surfaces of said conical member and adapted to move said member and bobbin axially simultaneously with said radial movement.

3. In a machine for winding a strand mass on a bobbin, of the type wherein a traverse frame carrying a thread guide moves radially in relation to a bobbin mounted for coaxial rotation with and longitudinal axial movement in relation to a revolvably mounted mandrel; a hollow conical member having an axis coinciding with the axis of the mandrel and mounted to rotate with and move axially along said mandrel and being adapted to impart said axial movement to the bobbin, said conical member having an internal surfac and an external surface; and a yoke having legs straddling the edges of said conical member and secured to said traverse frame for movement with said frame radially in relation to the axis of the bobbin, said yoke having pins adjustably mounted thereon, said pins slidably engaging the internal and external surface of said conical member and adapted to mov said member and bobbin axially along said mandrel simultaneously with said radial movement.

WILLIAM H. TAYLOR.

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