US3194278A

US3194278A - Yarn guide means for bobbin change mechanisms

Info

Publication number: US3194278A
Application number: US259047A
Authority: US
Inventors: Grob Willy
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-02-19
Filing date: 1963-02-18
Publication date: 1965-07-13
Anticipated expiration: 1982-07-13
Also published as: CH390829A; GB1025062A

Description

July 13, 1965 w. GROB 3,194,278

YARN GUIDE MEANS FOR BOBBIN CHANGE MECHANISMS Filed Feb. 18, 1965 2 Sheets-Sheet '1 Jul 13, 1965 w. GROB 3,194,278

YARN GUIDE MEANS FOR BOBBIN CHANGE MECHANISMS Filed Feb. 18, l963 Fig. 5

2 Sheets-Sheet 2 I2 r-"" m 4 3 i 35 A 96 L +11! Fi .7 g 25 INVENTOR 9 4 BY! I 1% ATTORNEY United. States Patent 3,194,278 YARN GUlDE MEANS FOR BOBBIN (IHANGE MECHANISMS Wiliy Groh, Langgrutstrasse 112, Zurich, Switzerland Filed Feb. 18, 1963, Ser. No. 259,047

Claims priority, application Switzerland, Feb. 19, 1962,

4- Claims. (Cl. 139-247) The invention relates to an automatic loom and more particularly to a mechanism for such looms with a pivoted sley and a plurality of pirns adapted to be inserted selectively into a shuttle.

It is a first object of the invention to provide means contributing to wind the pirns on the machine itself.

A further obejct of the invention is the provision of means so that the weft yarns come undoubtedly into a position beneath the tongue of the shuttle after pirn change. I

It is another object of the present invention to provide means facilitating an efficacious structure for changing the pirns on an automatic loom, which structure is relatively simple, has a few moving parts and is extremely accurate in its operation, without necessitating the use of expensive and complicated control means.

These and other features, capabilities and advantages of the invention will appear from the following detailed description of one embodiment, illustrated in the accompanying drawings.

FIG. 1 shows a side view of the device with several pirns,

FIG. 2 is a plan view of the device shown in FIG. 1,

FIG. 3 is a diagrammatic view of the device during the pirn change,

FIG. 4 shows diagrammatically a further view of the device in another position of the sley,

FIG. 5 is a view of the various positions of the crank shaft for driving the sley,

FIG. 6 is a front view of a part of a shuttle with an inserted pirn, and

FIG. 7 is a cross-section through the shuttle on the line VlI--Vil of FIG. 6.

The device is intended for a loom with automatic pirn or bobbin change in which the wound pirns 2 are supplied one over the other in a shuttle box 1. The empty pirns are wound with yarn on the machine itself. This winding mechanism is no part of the invention and therefore it is not in further details explained. The lowermost pirn i 2 in this mechanism which is not inside of a shuttle is determined by shuttle box 1 and other mechanisms and cannot be varied to a substantial extent.

The lowermost pirn 3 of the full wound pirns 2 stored in the shuttle box 1 lies directly over the shuttle 4 when the sley 243 of the loom lies in its foremost position shown in FIG. 3. The foremost position of the sley corresponds to the position I of the crank (see FIG. 5).

For pirn change a striker 6 acts directly over the lowermost pirn 3 disposed above the shuttle and forces it into the inside of the shuttle 4 (FIG. 3) whereby simultaneously the empty pirn '7 falls downwardly. The yarn ends or yarn tails 9 projecting from the pirns Z are held constantly taut but not pulled out by the rotating felt drum 8.

At the moment of pirn change the shuttle 4 is in the position 1 (FIG. 2) and the yarn ha drawn from the pirn 3 thus runs in the axial direction of the pirn towards the 3,1?42'78 Patented Juiy 13, 1965 drum 8. The pick for effecting the movement of the shuttle and thus its traverse across the loom is however effected at a somewhat later moment, that is in fact when the crank rod has already reached the position 11 (FIG. 5) and thus the shuttle has reached the somewhat displaced position II (FIG. 2).

In order that the yarns 9 shall not adopt the inclined position 9b shown in chain lines in FIGS. 2 and 6, in which threading in the slot of the shuttle 4 would be made diflicult or impossible, an adjusting yarn guide member 14 is provided which ensures that the yarn end 9 is at least approximately coincident with the axis of the pirn 3 also in the position II of the crank arm 35 or Ii of the shuttle 4, that is to say it runs in line with the longitudinal axis of the shuttle. By this displacement of the yarn between the shuttle 4 and the drum 8 the threading procedure can proceed regularly. The yarns can now pass in their normal position into the yarn receiving means of the shuttle, under the tongue 25 and between the brake jaws 36 (see FIG. 7) as a result of the increased pull on the yarn 9 by the striking movement of the shuttle. The increased pull on the yarn 9 has the effect that the yarn slips over the upper inclined part of the tongue 35 and is pushed under this tongue.

The brake jaws 36 disposed between the tongue 25 and the pirn are movable and bear yieldingly against the yarns 9c.

The adjusting yarn guide member 14 consisting preferably of bent strip material is provided with a shoulder 37 against which the lowermost yarn 9 of the pile of pirns bears. A rod 15 connected with an angle member 39 to the adjusting member 14 is supported in an axially displaceaole manner in two bearings 16 for clamping the yarn in the moment of the striking movement of the shuttle between

clamping heads

15a, 15b. A lever 17 1s pivoted to the rod 15 between the two bearings 16 on which a pull is exerted by a spring 18 approximately in the direction towards the crank shaft. A blocking pin 19 engaging behind a projection 20 or nose of the lever 17 prevents this lever initially from moving to the position shown in chain lines in FIG. 4. When pirn change is required the pin 19 is shifted upwardly by an intermediate member of the loom, not shown in the drawing, thereby the lever 17 is released and is moved under the action of the spring 18 into the position shown in FIG. 4 in chain lines. Thereby it guides the rod 15 and thus the adjusting member 14 together with the yarn 9 in the direction of the arrow B (FIG. 4). Thereby the yarn 9c adopts the position shown in FIG. 2 for the position II until the shuttle 4 has reached the other side of the loom and the crank shaft 35 has rotated through the position 1H.

Thereafter the adjusting yarn guide member 1 1 is moved back again to its original position. For this purpose a return lever 21 is pivotally fastened to the rod 15 is pushed into the path of an angular stop 22, rigidly fastened to the sley 23. On the return movement of the sley 23 in the direction of the arrow F as a result of the further movement of the crank shaft through position iii, the return lever 21, the rod 15 and the adjusting member 14 are pressed back to the original position shown in full lines in FIG. 4 whereupon the pin 19 again drops behind the projection 29 in order to retain the lever 17 until the next pirn change is required.

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.

What I claim is:

1. A yarn guiding device for a loom, comprising, in combination, a reciprocable sley; a shuttle movable with said sley between a first position for receiving a pirn and a second position disposed to be picked, said shuttle having yarn receiving means located in a longitudinal axis thereof; meansfor inserting a pirnhavin'g a yarn tail into saidshuttle in said first position; retaining means for. V retaining the yarn tail of the inserted pirn spaced from saidshuttleliand'being disposed in relation to said first position of said shuttle so that the yarn tail1extends in V "the direction of said longitudinal axis in-said first posi 'tion'of said shuttle, and atan angle" t-o said axis in said T a :second position of said shuttle; yarn guide means lo.-

tained yarnttail to a position alignedwith sa-idfllongitudinalaxis of said shuttle in said second position, open atingmeans for moving said yarn guide means to said been moved to said second position thereof so that the second position thereof after said shuttle with a pirn' has 7 yarn tail: is aligned with said shuttle at the start of'the' picking motion and :adapted to be inserted into said yarn receiving means;*and means connected With said yarn guide means andcontr-olled by said 'sley formoving said yarn guide means back to said first position. v

i directionJof the' rnovement of said slev foriengaging the;

yarn tail, said clampin-gmeans clarriping the yarn tail in a positionalignediwith ithe longitudinal-axis of said shuttle, andsaid yarn guidei means moy ing a portionpf the yarn tail between said clamping ;mjeanst andisaid shuttle Y to' a .p o'sition aligned with said longitudinalxaxis of said I shuttlein said second position wherebythe yarn tail is placed in a position to be inserted intosaid yarn receiving means of said shuttleyandi operating means connected to said yarn fguide-meansyand including a spring-.;connected, V to said yarn guide means for moving'the sametoengage i and move' the yarn tail 'tosaid ;a ligne dnposition,' and 1a blocking means for holding said yarn ,.guidefmeans and adapted to release said yarniguideimeans ih synchronism:

With'the 'rnovementof'said sley. for; movement by said spring; 'andmeans .operatedlby said sley;v for moving said I yarn guide means against the action ofass'aid'ispring .until? j J 7 said blocking'mreans:engages, saidiyarn'guide means and block movement of the same:

a second position disposedto bepicked ,-said shuttle'hav- 2.;A yarn guiding device for a loom, comprlsing, in I combinationga reciproeable' sley; a shuttle movable with said sley between a first position forreceiving a pirn' and a second position disposed to be picked, said shuttle having yarn receiving means located in a longitudinal axis there- 'the yarn tail of the inserted pirn spaced frornsaid shuttle andvbeing disposed in relation to said' first position 'of said shuttle so that the yarn tail extends in the direction of p of; means for inserting a pirn having a yarn tail into said shuttle in said first position; holding, means for holding said longitudinal axis in said; first position of said shuttle, H g

and at an angle to said axis insaid second position ofsaid shuttle; and a device including clamping means and a yarn guide means located intermediate said shuttle" and? I said' holding means and beingmoveable in the direction of the movement of said sleyt for engaging the yarntail, said clamping means clamping the yarn tail in a position aligned with the lo'ngitudinalaxis of said shuttleyand said yarn guide means moving a portion of the yarn tail between said clamping means and said shuttle to a posi-' tion aligned with said longitudinal axis. of said shuttle in said second position whereby the yarn tail is placed in a position to be inserted into'said yarn receiving means A of said shutle. 7

3. A yarn guiding device for a loom,cornprising, in

combination, a reciprocable sley; ashuttle movable'with said sleybetween a first position for receiving a pirn and i -asecond position disposed to he picked, said shuttle hav- 0 ing yarn receiving means located in a longitudinal axis thereof; means for inserting a pirn having a yarn-tail into a said shuttle in said firstposition; holding means for holding the 'ya rnv'tail of the inserted pirn' spaced from said" shuttle and being disposed in relationto saidi first position of said shuttle so that the yarn tail extends in the, direction of'said longitudinal axis in said first positionof said shuttle, and at an angle to said axis in said second 7 position of said shuttle; and a device including clamping means'and yarn-guide means located intermediate said sh Httle and said holding means and being movablein the 2,766,779,. 1-0/56' Goodhue et a l ing yarn'rec eiving m eans-"locatdinj along'itudin-alaxis Qthereof; means: for'inseiiting' a pirn'having ayarnitail into said shuttle in, saidfirstposition; holding means for hold-i ing the yarn tail of itheinsertedipirnsispacedgfrom. said shuttle'yand being disposediinirelation to saidtfirst' posi tion of, said shuttle so 'thatg the;yarndailrextendsin the 1 direction of r saida longitudinal c axis in said i first position I of' said shuttleg and ,at' an angle ito :saidaxis iinisaid sec-. 'i ondposition of said shuttle; and a deviceiincluding clamp-. 1 a ing means and yarn guide means located intermediate I said: shuttle ands'aid iholding )means; and being movable in the direction of the rnovement of saidsley for engagi ing'the yarn tail; sa'idiclanipirig mean-s clamping'theyardtailfin" a position :aligned-"Wit-hxthe longitudinal axis of said shuttle,; and saidyarn "guidemeans moving-a ipor- 5 tion of; the 1y-arn-ftail betWeen'said j cla-rn-pinggmeans and said shuttle to a position'ali-gned with said longitudinal *axispf' said shuttlejin said 'second position whereby. the E yarn tailis placed in a positionto the- 'in'sertedzinto said yarn receivingwmeans ofsaid shuttle; and operating means including "a. lever iconnected to said yarn guidefmeans: and to said clamping meansQa spring"eonnectedtosaid lever for moving 'saidyarn "guide meansfto' engage's'ai'di yarn-tailjso-that the same, is moved to said" aligned position, and for operating saidclamping mean'stto; clamp" the yarn tail, and blocking meansifor blocking movement of 'said lever under thetaction of saidspring; andlefi iptedto -v releasewsaid lever in synchronisrn- With itheimovement of said 'sleyg. and a' member connected ivith said lever; and t operated bysaid sle'yduring movement with'said shuttle to 'said *first position forxmoving said lever against the action of said-spring until s'aidblockingmeans engages j Refer nces ones by gnsn aminem NlIE A E AT NT 1,16 66 *11/ 1'5 -1*Wh'ittaker et'-a'l'.;.

DONALDW" A K iPfimary I E d i 1 I e 4; TA ryarn guiding device for a tl-ooingcomprising, in combination; a 'reciprocablei sley; a shuttle movable with 7 said sley :bet'weehafitst position gf or. receiving apirnsand V

Claims

1. A YARN GUIDING DEVICE FOR A LOOM, COMPRISING, IN COMBINATION, A RECIPROCABLE SLEY; A SHUTTLE MOVABLE WITH SAID SLEY BETWEEN A FIRST POSITION FOR RECEIVING A PIRN AND A SECOND POSITION DISPOSED TO BE PICKED,S AID SHUTTLE HAVING YRN RECEIVING MEANS LOCATED IN A LONGITUDINAL AXIS THEREOF; MEANS FOR INSERTING A PIRN HAVING A YARN TAIL INTO SAID SHUTTLE IN SAID FIRST POSITION; RETAINING MEANS FOR RETAINING THE YARN TAIL OF THE INSERTED PIRN SPACED FROM SAID SHUTTLE AND BEING DISPOSED IN RELATION TO SAID FIRST POSITION OF SAID SHUTTLE SO THAT THE YARN TAIL EXTENDS IN THE DIRECTION OF SAID LONGITUDINAL AXIS IN SAID FIRST POSITION OF SAID SHUTTLE, AT AN ANGLE TO SAID AXIS IN SAID SECOND POSITION OF SAID SHUTTLE; YARN GUIDE MEANS LOCATED INTERMEDIATE SAID SHUTTLE AND SAID RETAINING MEANS AND BEING MOVABLE IN THE DIRECTION OF THE MOVEMENT OF SAID SLEY BETWEEN A FIRST POSITION ALIGNED WITH SAID SHUTTLE IN SAID FIRST POSITION AND A SECOND POSITION ALIGNED WITH SAID SHUTTLE IN SAID SECOND POSITION FOR SLIDINGLY ENGAGING THE YARN TAIL AND FOR MOVING THE ENGAGED AND RETAINED YARN TAIL TO A POSITION ALIGNED WITH SAID LONGITUDINAL AXIS F SAID SHUTTLE IN SAID SECOND POSITION, OPERATING MEANS FOR MOVING SAID YARN GUIDE MEANS TO SAID SECOND POSITION THEREOF AFTER SAID SHUTTLE WITH A PIRN HAS BEEN MOVED TO SAID SECOND POSITION THEREOF SO THAT THE YARN TAIL IS ALIGNED WITH SAID SHUTTLE AT THE START OF THE PICKING MOTION AND ADAPTED TO BE INSERTED INTO SAID YARN RECEIVING MEANS; AND MEANS CONNECTED WITH SAID YARN GUIDE MEANS AND CONTROLLED BY SAID SLEY FOR MOVING SAID YARN GUIDE MEANS BACK TO SAID FIRST POSITION.