US2969196A

US2969196A - Coil starting device for yarn winding machines

Info

Publication number: US2969196A
Application number: US620661A
Authority: US
Inventors: Kupper Wilhelm
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-11-09
Filing date: 1956-11-06
Publication date: 1961-01-24
Anticipated expiration: 1978-01-24
Also published as: DE1234603B; CH359076A

Description

Jan. 24, 1961 w. KUPPER 2,969,196

con STARTING DEVICE'FOR YARN WINDING MACHINES Filed Nov. 6, 1956 2 Sheets-Sheet l Jan. 24, 1961 w. KUPPER 2,969,196

COIL. STARTING DEVICE FOR YARN WINDING MACHINES Filed Nov. 6, 1956 2 Sheets-Sheet 2 United States Patent COIL STARTING DEVICE FOR YARN WINDING MACHINES Wilhelm Kiipper, Kreis, Erkelenz, Germany, assignor to Walter Reiners, Gladbach, Germany Filed Nov. 6, 1956, Ser. No. 620,661

Claims priority, application Germany Nov. 9, 1955 Claims. (Cl. 242-27) My invention relates to automatic yarn-coil winding machines, more particularly to devices for starting a new coil after completion of the one previously wound, and is an improvement over coil starting devices of the same general type disclosed in the copending application Serial No. 538,234, filed Oct. 3, 1955, and Serial No; 589,454, filed June 5, 1956, by Stefan Fuerst and assigned to the assignee of the present invention.

According to the disclosure of the copending application, the winding of a new coil is started with the aid of a clamping device which is mounted on the head of the revolvable winder spindle and which holds the starting end of the yarn clamped during the initial winding and accelerating period of the spindle. This clamping device has a hook-shaped member joined with, and acted upon by, a pivotally movable weight which, under the effect of centrifugal and accelerating forces, turns and shifts the hook member from a yarn-catching and clamp ing position into a yarn-releasing position. Relating to such machinery, it is an object of my invention to improve the coil starting operation toward in creased reliability of the yarn-end release so that the starting end of the new coil, when being released, will always promptly and safely be moved toward, and wound into, the body of the new coil being wound.

Another object of my invention is to simplify the yarnend clamping devices by eliminating the necessity for pivotal movement of a weight or weighted clamping member for catching, temporarily clamping, and thereafter releasing the yarn-end of the coil next to be wound.

To this end, and according to a feature of the inven tion, I provide the yarn-entrance guide of the clamping device with an inclined guide face or edge of such steepness that the severed yarn end, once released,flings in the direction of rotation along the incline due to centrifugal force occurring at high speed of spindle revolution.

According to another feature, I provide means whereby the insertion of the yarn into the clamping device occurs when the clamping device is resiliently closed, and the sliding movement of the yarn end along the incline due to centrifugal force takes place only after opening of the clamping device. According to a more specific feature, the clamping device is made inherently resilient so that it will lift itself off the spindle head by centrifugal force. Furthermore, a nose is preferably disposed in front of the yarn-end clamping device and partially extends over the clamping device.

The above-mentioned and more specific objects and features of the invention will be more fully understood from the embodiment illustrated on the drawing by way of example and described below on the drawing wherein:

Fig. l is a perspective view of a coil winding machine comprising a number of coil winding stations according to the invention;

Fig. 2 is a lateral view of an individual winding station of the same coil winding machine;

Fig. 3 is a front view of a coil winding head and a "ice clamping device according to the invention as used in the 7 station according to Fig. 2;

Fig. 4 shows a detail, on a larger scale, of the device shown in Fig. 3;

Fig. 5 shows another detail, also on a larger scale;

Fig. 6 is a schematic, explanatory illustration of a complete coil winding station corresponding to Fig. 3 and embodying the features of Figs. 4 and 5.

As a rule, a yarn winding machine comprises a large number of individual winding stations as exemplified by the machine shown in Fig. 1. Each station is supplied with yarn from a package A from which the yarn passes through an eye B or other guide means to the thread guide 4 of the winder device proper.

Fig. 2 shows the essential parts of one of the coil winding stations. It comprises a spindle head I mounted on a winder spindle 1a which is journalled in, and protrudes from, a gear housing 1b and, when in operation, is driven in the direction of rotation denoted in Figure 6 by the arrow. Mounted between the spindle head 1 and a counter bearing 2 is the bobbin core or quill 3 to be covered with a package of yarn. The rotating thread guide 4 is mounted on a shaft 4a which is also journalled in the gear housing 1b and, during operation of the winding station, rotates simultaneously with spindle In. Fig. 2 shows the winding station shortly after a completely wound bobbin 5 has been discharged into a receiving tray 6 and has been pushed to the rear side of the station. The yarn F, coming from the supply package (A in Fig. 1) passes through a guiding groove 4b of the rotating thread guide 4 past the spindle head 1 to the full bobbin 5. Mounted between spindle head 1 and receiving tray 6 is a stopping and severing device 7 (Figs. 1, 2, 6) which is active after each coil change.

The spindle head 1 has a recessed surface at its periphery and is provided with a rigid nose 101 (Figs. 3, 4) so spaced from the surface 100 as to form an interspace 110. Mounted on spindle head 1 is a hook shaped member 104 which forms a clamping device at 102 and has a lateral edge 103. The edge 103 forms a steep incline along which the thread F may glide during the operation described below. The hook member 104 is fastened to spindle head 1 by means of a screw 106 and is sufficiently resilient to lift itself off the surface 100 in the outward direction denoted by arrow in Fig. 4 when subjected to a predetermined magnitude of centrifggall force during the accelerating period of the spindle When during coil changing operation the thread F is moved by device 7 into the vicinity of spindle head 1 and the full coil 5 is pushed to the rear, this stage being shown in Fig. 2, then the thread F is moved against the nose 101, and the starting end F of the yarn passes beneath the clamp 102 and is gripped between clamp 102 and spindle head 1 as shown in Figs. 3 and 4. Since the yarn F is now held fast between clamp 102 and spindle head 1 on the one hand, and the device 7 (Figs. 4, 6) on the other hand, the starting end 107 of the yarn F becomes torn by the commencing revolution of the spindle head. The yarn piece 107 then remains attached to the spindle head. After a given speed of spindle revolution is reached, the hook-shaped member 104 with clamp 102 is lifted by centrifugal force in the direction of the arrow 105. This releases the yarn end 107 from between clamp 102 and spindle head 1. The loose end 107, under the effect of centrifugal force, fiings outwardly and slides along the inclined edge 103 until it lies entirely in front of the nose 101 and out of the clamping location between clamp 102 and spindle head 1. The end 107 is then Wound into, and carried by, the next turns of yarn being wound onto the coil core.

In order to secure the just-mentioned performance, the guiding edge 103, as shown in Fig. 3, must face away from the body of the coil being wound and must form an obtuse angle with the spindle axis or rather with the geometric projection of that axis onto the tangential plane in which the edge 103 is located (plane of illustration in Fig. 3). g

It will be apparent to those skilled in the art that devices according to the invention can readily be modified in various respects, for instance as regards the shape and particular arrangement of the rigid nose Hi1 which may also be joined with the clamping evice M2, or as regards the construction of the hook member 104 or the stopping and severing device 107; and such modifications, within the essence of my invention, are intended to be witnin the scope of the claims annexed thereto.

I claim:

1. In a yarn-coil winding machine, a device for starting a coil winding operation after completion of the preceding coil, comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be wound into the core, a yarn clamping and entraining device having a portion fixedly mounted on said spindle head and having another portion thereof free for resilient radial movement relative to the spindle axis, said other portion defining a yarn clamping location between said other portion and said spindle head as said spindle head revolves, said other portion of said clamping device comprising a member automatically movable from initial yarn clamping to subsequent yarn releasing positions during the starting interval of said spindle head, said member having a guide face facing away from the coil being wound and forming an acute angle with the geometric plane normal to the spindle axis and which intersects said guide face at its rearmost terminal portion relative to tne Winding direction of rotation of said spindle head, whereby the yarn end when released from said clamping device is moved by its centrifugal force along said guide face out of said clamping location of said clamping device.

'2. In a yarn-coil winding machine according to claim 1, said coil starting device comprising a thread guiding nose located on said spindle head to revolve together therewith and engageable by the yarn being wound, said nose being disposed along the yarn path immediately ahead of said clamping device for guiding the yarn into the clamping location of said device.

3. In a yarn-coil winding machine according to claim 1, said coil starting device comprising a thread guiding nose firmly secured to said spindle head and engageable by the yarn being wound, said nose being disposed along the yarn path immediately ahead of, and in overlapping relation to, the clamping location of said clamping device for guiding the yarn into said location.

4. In a yarn-coil winding machine, a device for starting a coil winding operation after completion of the preceding coil, comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be wound onto the core, a yarn clamping and entraining device comprising a flat resilient clamping member having a portion thereof fixedly mounted on said spindle head and having a clamping portion pressed inwardly toward and normally in engagement with said spindle head to define a clamping position for clamping the starting end of the yarn during coil starting operation, said member being centrifugally movable away from said clamping position when said spindle head accelerates to a given speed during said starting operation, said member having an edge directed and facing away from the coil being Wound, said edge forming an acute angle with the geometric plane normal to the spindle axis and which intersects said edge at its rearmost terminal portion relative to the Winding direction of rotation of said spindle head,

5. A yarn-coil winding machine comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be wound on the core, the machine having a device for starting a coil winding operation comprising means for parting the yarn end of a full core after the latter leaves the spindle head, a yarn-clamping device mounted on the spindle head for resilient radial movement relative to the spindle axis and having a portion engageable with the yarn coming from the guide to hold the starting end of the yarn clamped at a clamping location against said spindle head during the initial winding and accelerating period of the spindle head, said yarn-clamping device forming a yarn entrance guide turning together with the spindle head, said entrance guide having an outwardly inclined edge directed and facing away from the coil being wound, said edge being of such steepness that tile yarn end, when parted and released from the clamping device, is flung aiong said outwardly inclined edge and out of said clamping range by centrifugal force due to the high rotary speed of the spindle, tne yarn end thus being flung free of the rotating spindle head and being then entrained by and wound into the next turns of yarn being wound onto the coil core, said portion of said clamping device subsequent to said initial winding and accelerating period of the spindle head being movable outwardly by centrifugal force to release said end from said clamping location.

6. A yarn-coil winding machine comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be wound on the core, the ma: chine providing a device for starting a coil winding operation comprising means for parting the yarn end of a full core after the latter leaves the spindle head, a yarn-clamping device fixedly mounted in a cantilever manner at one end thereof for rotation together with the spindle head and for radial movement of another end of said device relative to the spindle axis, said other end having a clamping portion engageable with the yarn coming from the guide to hold the starting end of the yarn clamped against said spindle head during the initial winding and accelerating period of said head, said yarn clamping device forming a yarn entrance guide turning together with the spindle head, said entrance guide having an outwardly inclined edge directed and facing away from the coil being wound, said edge being of such steepness that the yarn end, when parted and released from the clamping device, is flung along said outwardly inclined edge by centrifugal force due to the high rotary speed of the spindle, said clamping portion being resiliently biased so as to clamp the starting end of the yarn during the initial winding and accelerating period of the spindle head and so as to be subsequently movable outwardly by centrifugal force to release said end.

7. A yarn-coil winding machine comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be wound on the core, the machine providing means for parting the yarn end of the full core after the latter leaves the spindle head, a yarnclamping device comprising a member mounted on the spindle head for rotation therewith and biased radially inwardly toward the spindle head for resilient radial movement away from the spindle axis by centrifugal force due to the high rotary speed of the spindle, said member being engageable in its inwardly biased position with the yarn coming from the guide to hold the starting end of the yarn clamped against the spindle head during the initial winding and accelerating period of the spindle head, said member subsequent to said initial winding and accelerating period'of the spindle head, being movable outwardly by said increasing centrifugal force acting on said member to release the yarn end, the clamping device forming a yarn entrance guide turning together with the spindle head, said entrance guide having an inclined edge directed and facing away from the coil being wound and of such steepness that the yarn end, when pa.ted and released from the clamping device, is flung along said edge toward the coil being wound and outwardly away from the spindle head.

8. A yarn-coil winding machine comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be guided to and wound on the core, the machine having a device for starting a coil winding operation comprising means for parting the yarn end of a full core after the latter leaves the spindle head, a yarn-clamping device mounted on the spindle head for rotation therewith and for resilient radial movement of a portion thereof relative to the spindle axis, said portion being engageable with the yarn coming from the guide to hold the starting end of the yarn clamped against the spindle head during the initial winding and accelerating period of the spindle head, the yarn-clamping device comprising a yarn entrance guide member turning together with the spindle head, said entrance guide member comprising a resilient arm mounted at one end portion thereof on the spindle head and extending at its other, free end in the direction of the coil being wound, the arm forming a yarn guide and support comprising an inclined edge directed and facing away from the coil being wound and forming an acuate angle with a plane normal to the spindle axis and which intersects said yarn guide of said resilient arm at the rear-most terminal portion of said guide relative to the winding direction of rotation of said spindle head, so that the yarn end, when parted and when released from the clamping device, is flung along said inclined edge of the yarn guide by centrifugal force due to the rotary speed of the spindle, the free end portion of the resilient arm being pressed toward the spindle head so that the starting end of the yarn is clamped during the initial winding and accelerating period of the spindle head and is subsequently moved outwardly by centrifugal force acting on the rotating clamping device.

9. A yarn-coil winding machine comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be guided to and wound on the care, the machine having a device for starting the coil winding operation comprising means for parting the yarn end of a full core after the latter leaves the spindle head, a yarn-clamping device mounted on the spindle head for rotation therewith and for resilient radial movement of a portion thereof relative to the spindle axis, said portion being engageable with the yarn coming from the guide to hold the starting end of the yarn clamped against the spindle head during the initial winding and accelerating period of the spindle head, the yarn-clamping device comprising a yarn entrance guide member turning together with the spindle head, said entrance guide member turning together with the spindle head, said entrance guide member comprising a resilient arm mounted at one end portion thereof on the spindle head and extending at its other, free end in the direction of the coil being wound, the arm providing a yarn guide having an outwardly directed incline directed and facing away from the coil being wound and forming an acute angle with a plane normal to the spindle axis and which intersects said yarn guide of said resilient arm at the rear-most terminal portion of said guide relative to the winding direction of rotation of said spindle head so that the yarn end, when parted and when released from the clamping device, is flung along the outwardly directed incline of the yarn guide by centrifugal force due to the high rotary speed of the spindle, the free end portion of the resilient arm being pressed toward the spindle head so that the starting end of the yarn is clamped during the initial winding and accelerating period of the spindle head and is subsequently moved outwardly by centrifugal force acting on the rotating clamping device, the spindle head having a recessed surface portiton, said incline being radially spaced from an dadjacent the recessed portion, the spindle head providing a thread guiding ridge forming a border edge of the recess and disposed along the yarn path immediately ahead of the clamping device.

10. A yarn-coil winding machine having means for performing a coil core exchanging operation and comprising a revolvable spindle head having means for entraining a coil core, means for driving the spindle head, a thread guide defining a path for the yarn to be guided to and Wound on the core, the machine having a device for starting the coil winding operation comprising means for parting the yarn end of a replaced precedingly wound full core after the latter leaves the spindle head, a yarnclamping device mounted on the spindle head for rotation therewith and comprising a resilient arm fixedly mounted at one end thereof on said head in a cantilever manner for rotation together with said head and for radial movement of the other, free end of said arm relative to the spindle axis, said free end extending in the direction of the coil being wound and having a clamping portion engageable with the yarn coming from the guide to hold the starting end of the yarn at a first clamping location clamped against the spindle head during the initial winding and accelerating period of the spindle head, said resilient arm defining a yarn guide having an outwardly directed incline directed and facing away from the coil being wound and forming an acute angle with a plane normal to the spindle axis and which intersects said yarn guide of said resilient arm at the rearmost terminal portion of said guide relative to the winding direction of rotation of said spindle head, so that the yarn end, when parted and when released from the clamping device, is flung along the outwardly directed incline of said yarn guide by centrifugal force due to the high rotary speed of the spindle, the free end portion of the resilient arm being normally biased toward the spindle head so that the starting end of the yarn is clamped between said free end and said head during the initial winding and accelerating period of the spindle head and is subsequently moved outwardly by centrifugal force acting on the rotating clamping device, the spindle head having a recessed surface portion, said incline being radially spaced from and adjacent the recessed portion, the spindle head being provided with a thread guiding ridge forming a border edge of the recess and disposed along the yarn path immediately ahead of the clamping device, said means for parting the yarn end comprising means operative in correlation with the operation of said coil core exchanging means to move the yarn leading from said full core to said thread guide into the vicinity of the ro tating spindle head, to be clamped at said first location by the rotating clamping device and also including means to clamp at a second location the yarn portion leading to the replaced precedingly wound coil, whereby as said head rotates the yarn is pulled tight between said two clamping locations to rupture the yarn therebetween.

Siegenthaler Dec. 8, 1942 Joyce Sept. 20, 1955