US3552693A

US3552693A - Twin-spool holder for twining and spinning machinery

Info

Publication number: US3552693A
Application number: US833280A
Authority: US
Inventors: Siegfried Scherf
Original assignee: HAMEL ZWIRNEREI U SPINNER GmbH
Current assignee: HAMEL ZWIRNEREI U SPINNER GmbH
Priority date: 1968-06-14
Filing date: 1969-06-16
Publication date: 1971-01-05
Anticipated expiration: 1988-01-05
Also published as: GB1210343A; DE1760637A1; BR6909771D0; ES368118A1; FR2010876A1; DE1760637B2; CH492041A; AT316374B

Abstract

Two spools, each with a hollow core, are stacked in a cylindrical housing with the aid of a central body having a hollow stem traversed by a tubular spindle through which the threads from the spools are guided, this body having two axially spaced cylindrical centering surfaces, fitting snugly into adjoining ends of the corresponding spool cores, and an annular ridge between these shoulders separating the cores. The spool cores are removably retained on the central body by oversized elastic discs axially spaced from the cylindrical shoulders.

Description

[50] FieldofSearch................. 2242/1295.

[56] References Cited UNITED STATES PATENTS 3,119,224 1/1964 Kocks.........................,. 57/5852 3,208,690 9/1965 242/131 3,388,806 6/1968 Cunningham,.lr.etal... 211/13 3,297,276 1/1967 Skufca.......................... 242/131 Primary Examiner-Leonard D. Christian Attorney-Karl F. Ross Inventor Siegfried Scherf Munster-Gremmendorf, Westphalia, Germany Appl. No. 833,280

Filed June 16, 1969 [45] Patented Jan. 5, 1971 Assignee Hamel (;.m.h.H. Zwirnerei-u.

Spinnereimaschinen Munster, Westphalia, Germany a corporation of Germany Priority June 14, 1968 Germany No. 1,760,637

United States Patent ABSTRACT: Two spools, each with a hollow core, are stacked in a cylindrical housin having a hollow stem travers which the threads from the spools two axially spaced cylindrical centering surfaces, fitti into adjoining ends of the correspondin annular ridge between these shoulders The spool cores are removably retained on oversized elastic discs axially s shoulders.

12 l 2 350 H W 25 47 255 ,6 3 1 s In 2 [54] TWIN-SPOOL HOLDER FOR TWlNlNG AND SPINNING MACHINERY 10 Claims, 2 Drawing Figs.

[51] Int Cl SIEGFRIED SCHERF I N VEN TOR.

BY {K t R ATTORNEY PATENTEUJAN 5I97l 3552,6923

sum

2 or 2 SCHERF SIEGFRIED I'UR.

BY ja My present invention relates to a twin-spool holder to be used as a supply device for feeding threads from a pair of spools to a twisting or twining mechanism.

In commonly assigned US Pat. .No. 3,119,224 (KOCKS) there has been shown a spool holder of this general type in which an upper and a lower spool,.each with a cylindrically tubular core, are juxtaposed on a common tubular spindle within a cup-shupcd cylindrical housing open at the top. The threads from the two spools are guided through that spindle to the bottom of the housing on their way toa takeup reel, with the upper thread passing directly to. the spindle top whereas the lower thread reaches that top upper spool.

An object of my present invention is to provide a spool mounting of this general type in which the need for passing the thread of one spool through the core of another spool is avoided, thus simplifying the task of splicing broken threads and substituting fresh spools for exhausted ones.

It is also an object of my present invention to provide a mounting for a pair of spools which are to be held assembled both during transport to a twining mechanism and upon transfer to a thread dispenser associated with that mechanism.

It is also an object of this invention to provide an improved dual-thread dispenser which is of compact construction and minimum axial length to reduce the orbit of aballooning yarn formed from the two dispensed threads.

In order to realize the aforestated objects, I provide a central body on which the cores of the two 'spools can be coaxially positioned with small axial separation, this body having a peripheral flange in contact with confronting ends of the two cores and further having a pair of cylindrical centering surfaces on opposite sides of this flange which fit snugly into the respective cores. These cores are releasably gripped by respective retaining means, such as oversized annular discs of rubber or other resilient material, which are independent of the associated centering surfaces and resist axial separation of the two spools. In the assembled condition, the central body extends into at least one of the cores and preferably into both of them over substantially less than the axial core length, thereby leaving room for the insertion of another seat-forming element into that core from its other end whereby the two stacked spools can be removably mounted on a spindle plate by way of the core of the of a twining machine as well as on a transport rack or similar temporary support.

The invention will be described in greater detail hereinafter with reference to the accompanying drawing in which:

FIG. I is a sectional elevational view of a thread dispenser in accordance with the invention, forming part of an otherwise conventional twisting mechanism; and

FIG. 2 is an elevational view, partly in section, of a transport rack for a plurality of two-spool stacks of the type shown in FIG. 1.

The mechanism shown in the drawing comprises a tubular spindle I traversing the bottom 3 of-a cylindrical housing 2 open at the top, this bottom being provided with a boss 30 forming a seat for a pair of

spools

8, 8 having tubular cores 9 of cylindrical shape. Boss 30 extends partly into the lower end of core 9 which also projects into an ,annular groove 24 of housing bottom 3. The housing or cage 2 surrounds the spools with enough annular clearance 7 to'allow their respective threads 10, 11 to be drawn off along the inner peripheral housing wall even when the bobbin body 25, 25' of each spool is at full size. v

A pulley 6 on a shaft 1', forming an independently rotatable downward extension of spindle l, is engaged by a belt 31 which rotates this shaft as shown by arrow A. Pulley 6 is integral with a disc 5 carrying a frustoconical shield 4 which deflects the yarn l0, 11 as it emerges from the lower end of spindle I within shaft 1' and passes outwardly through a port 32 in disc 5 on its way to a guide 33'above housing 2. A takeup reel, not shown, draws the yarn upwardly (arrow B) at a speed which, as is well known, is related to the rotary speed of shaft 1' in accordance with the desired rate .of twist. A stationary shell 34 surrounds the

cage

2, 3 to limit the excursion of the ballooning yarn 10, ll; shell 34 carries several bar magnets 35 which hold the

cage

2, 3 against rotation by cooperating withbar magnets 36 (only one shown) on that cage, in the manner disclosed in commonly owned application Ser. No. 810,464 filed March 26, 1969 by A. Greive and A. Treus.

In accordance with my present invention, cores 9 and 9' are separated by a thin annular ridge or flange 18 on a central body l4 which is formed with a pair of centering surfaces 22, 22' of cylindrical shape received with close fit in the adjoining ends of

cores

9 and 9 whose confronting faces l7, 17' rest against the ridge 18. Body 14 has a central bore traversed by a hollow stem 13 which in turn surrounds the'spindle l; stem 13 may be removably inserted intobody 14 with frictional fit or with threaded engagement.

In=order to prevent untimely separation of spools 8 and 8', body 14 is further provided with retaining means in the form of a pair of oversized annular discs 20, 20' on opposite sides of its flange 18, these discs being sprung into

annular grooves

21, 21 that are axially spaced from centering surfaces 22, 22'; the intervening body portions of smaller diameter have been designated 23 and 23'. The remote boundary of eachgroove 21, 21', as seen from the core junction 18, is formed by a transverse shoulder on ahead 19, l9whose diameter exceeds that of portion 19,19- but is slightly less than that of surface 22, 22' so that a small gap remains: between each of these heads and the inner wall surface l6, 16. of the corresponding core. It will be apparent that, upon introduction of body 14 into core 9, the edge of retaining disc 21 deflects upwardly into the clearance around body portion 23 so that little force is required to overcome the frictional resistance of that disc; when it is desired to extract the body 14 from core 9, the frictional resistance of retaining element 20 is increased since the upper face of head 19 prevents reverse-deformation of the disc edge so that considerably greater force is required-to disassemble the parts. The same applies, of course, with reference to gripping element 20' and core 9.

Since the body 14 does not occupy more than a small fraction of the interior of each core, extending-over less than half the

axial core length

15 or 15, the stack '8, 8' held together by body 14 can be removably mounted on some other temporary support such as, for example, a boss 28 on a transport rack 26 shown in FIG. 2. Rack 26 is formed with two or more pairs of casters 27 (only two shown) and is provided with a multiplicity of bosses 28 to receive a like number of stacks, a rod 29 projecting outwardly from each boss to pass through the central bore of the body 14 from which the stem 13 of FIG. I has been removed. Thus, as clearly illustrated in FIG. 2, a stack of

spools

8, 8 can be progressively built by first placing a core 9 with spool 8 on a boss 28, then inserting a body 14 until its ridge l8 strikes the inserted core, andthereafter adding the second core 9 with its spool 8'. If desired, a further core-and spool could be added to the stack with the aid of a second body 14 fitted onto the free end of rod 29, such an arrangement enabling the twining of three threads by the dispenser shown in FIG. 1.

Thus, the assembly, transportation, operative positioning. removal and disassembly of astack of two (or more) spools according to my invention can be carried out in a simple and efficient manner.

I claim:

1. A supply device for simultaneously dispensing threads from two spools, comprising a pair of coaxially juxtaposed cylindrically tubular cores having respective spools wound thereon, a central body coaxially positioned within said cores, said body having a peripheral-ridge incontact with confronting ends of said cores, and retaining means carried by said.

' body on opposite sides of said ridge'forreleasably gripping said cores from within, said body being provided with a pair of cylindrical centering surfaces independent of said retaining fitting engagement with said confronting ends of said cores, said body projecting into at least one ofsaid cores over substantially less than the axial core length.

2. A device as defined in claim l wherein said retaining means comprises a pair of oversized resilient annular discs axially spaced from said centering surfaces for free peripheral deformation upon insertion thereof into a corresponding core.

3. A device as defined in claim 2 wherein said body is pro vided with axial shoulders disposedim'rnediately beyond said discs in the direction of insertion for preventing reverse deformation thereof, said shoulders having smaller diameters than said centering surfaces.

4. A device as defined in claim 3 wherein said body is formed with annular grooves adjoining said shoulders, said discs being resiliently fitted in said grooves; r

5. A device as defined in claim 1, further comprising a cylindrical housing coaxially surrounding said spools and forming a central seat for said one of said cores.

6. A device as defined in claim 5 wherein said housing has a bottom provided with a central bossformingsaid seat. said boss projecting partly into said one of said cores.

7. A device as defined in claim'6 wherein said bottom is formed with an annular groove around said boss receiving an end of said one of said cores. 1

8 A device as defined in claim 6, further comprising a hollow spindle traversing said boss, said spindle extending axially beyond said housing for receiving threads from both said spools.

9. A device as defined in claim 8, further comprising a hollow stem traversing said body and extending axially therebeyond, said spindle passing through said stem.

10. In combination, a plurality of supply' devices as defined in claim 1 and a movable rack with a plurality of bosses each entering said one of said cores of a respective supply device for removably supporting same on said rack.

Claims

1. A supply device for simultaneously dispensing threads from two spools, comprising a pair of coaxially juxtaposed cylindrically tubular cores having respective spools wound thereon, a central body coaxially positioned within said cores, said body having a peripheral ridge in contact with confronting ends of said cores, and retaining means carried by said body on opposite sides of said ridge for releasably gripping said cores from within, said body being provided with a pair of cylindrical centering surfaces independent of said retaining means disposed on opposite sides of said ridge for snugly fitting engagement with said confronting ends of said cores, said body projecting into at least one of said cores over substantially less than the axial core length.

2. A device as defined in claim 1 wherein said retaining means comprises a pair of oversized resilient annular discs axially spaced from said centering surfaces for free peripheral deformation upon insertion thereof into a corresponding core.

3. A device as defined in claim 2 wherein said body is provided with axial shoulders disposed immediately beyond said discs in the direction of insertion for preventing reverse deformation thereof, said shoulders having smaller diameters than said centering surfaces.

4. A device as defined in claim 3 wherein said body is formed with annular grooves adjoining said shoulders, said discs being resiliently fitted in said grooves.

6. A device as defined in claim 5 wherein said housing has a bottom provided with a central boss forming said seat, said boss projecting partly into said one of said cores.

7. A device as defined in claim 6 wherein said bottom is formed with an annular groove around said boss receiving an end of said one of said cores.

8. A device as defined in claim 6, further comprising a hollow spindle traversing said boss, said spindle extending axially beyond said housing for receiving threads from both said spools.

10. In combination, a plurality of supply devices as defined in claim 1 and a movable rack with a plurality of bosses each entering said one of said cores of a respective supply device for removably supporting same on said rack.