DE1938563A1 - Roll holder for sewing machines - Google Patents

Description

Roll holder for sewing machines

The invention relates to supporting pins for flangeless una provided with splashing roles in sewing machines ,, v / obei the unwinding of the needle thread of rollers. (Coil) is carried ^ are flangeless or provided with flanges and fixed relative to their support pins.

In lockstitch sewing machines of the household type, the thread is unwound from flangeless or flanged bobbins either as a result of the hitching process, or the unwinding occurs because of the rotation of the

909885/1274

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BATHROOM OBlGlNAL

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Bobbin of the bobbin when the bobbin is being filled, which is normally carried out when the machine parts are in their rest position St if thai te tion for the flangeless or with chipped reels simply formed by one or more pins which run essentially vertically and are attached to the machine frame, and on which the fla.nsGb.loseη or rail; flanges ver The bobbins seen are rotatably mounted. In the case of the flangeless or flanged bobbins, the thread goes "from itself" in a direction which is essentially perpendicular to the pin holder axis, and. "winds-s-1 gh", as a result of the rotation of the flangeless or flanged bobbins around the mounting pin, which is generated by the tangential thread tension, the thread runs the second way even essentially 'parallel to the pin holding mechanism and unwinds from the flanged or flanged bobbins which are attached to the holding pin by suitable locking means provided on it, whereby the thread, a rotational movement uia the axis of the pin around executed at Euletsi; winding-called '■ - ■ sys tea is advantageous that a regelEiäßigere Abv / ent of the thread is effected, particularly at high Itaia - geschvrlndigkeitens.

The. known 'flangeless' or 'flanged' Coils have a now standardized longitudinal opening, Nevertheless, the longitudinal openings are the flanged ones Coils strongly uiiteraehiadlieh compared to those of the flangeless bobbins »In addition, those with flanges

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provided bobbins (rolls) have two end parts, each of which has a surface facing the wound thread • indicates and 'is sometimes rough, and occasionally Notches are present that aur attachment of the free Serving thread end. As a result of this fact, the thread can 'rait this surface of the when pulling up and unwinding uit flanged coil.-come together and aD-tear. The invention has set itself the goal of providing a retaining pin that can be used for both flanges provided coils, as well as for flaneless coils can be used is, and has a simple design and can be manufactured cheaply, and also good Work results straight: 1er second way of working "delivers.

To achieve this goal, according to the invention Flangeless and flanged pen holder Coils provided, which a.i their. ™ lower part designed in this way are that a locking device for never flangeless bobbins and a storage device for those with flanges provided coil is created, whereby a simple device is provided for the fastening of the flanged coil, which works together with the bearing device, ut: the fastening of the flanged ones Ensure coil on the mounting pin see below. To avoid, that the thread when unwinding, from the "old Flanged coil in contact with the upper one End part ei te θ he coil comes. To solve this problem are the opuleuhalterung by a Vertlkalstif.t formed of a slightly conical shape, a locking element is provided on its lower rope, which "-" elastic against the inner surface of the opening of the flanschlosei: coil presses, v / obai further on its, upper one

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BATH

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Part .ein an annular bearing surface for the lower end the flanged spool is provided, and a ring cooperating with the bearing surface on the mounting pin is fastened to the with To clamp the flanged coil to it,

Further gate parts and details of the invention result can be found in the description of 'Execution Examples' the drawing; in the drawing ^ actually

Fig. 1 shows a sewing machine with holder B pinsii for a hollow with xxnä a roll without splash;

Figo- "2-. A section through the mounting pin and the V flanged deserved role thereon;

Figo 3 shows a section through. "- the Halteruvigsstlft and the Flanschloee roller arranged on this;

The household nutritional device 10 shown in FIG. 1 has a '"free arm i 1 so / ie an a 3 tend er 12, which connects the free arm r .. with a hori-sofita-laria 1.3. Furthermore, in V (33rbindu .ng with the free arm 11 an attachment "T 4" is provided for the (not inclined) drive motor If the spool v / ickel-, pin 17 protrudes ο The mounting pins 1.3 for the flanged spool 19 and the flanschloce spool, 20 are attached to the upper rope of the ilotoraufsotaes

The ait flaee-provided coil 19 and the flangeless one Coil 20 are b-exampleswss'is © - to-sanraen on the two Retaining pins, 18 attached and kötraen at the same time: when sewing with two hairs, the thread is used " 21 of the cit flanged coil runs over a

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Thread guide part 23 which is carried by a rod 25 fixed to the stand 12 by means of screws 26 and is then fed to the bobbin winder in the bobbin filling process; the thread 22 of the flangeless bobbin (roll) runs over a thread guide part 24 also attached to the rod 25 and is guided to the sewing machine needle (not shown in the drawing) Coil 20 and are formed by a vertical, slightly conical pin 27, which has a locking element 28 at its lower end (FIGS. 2 and 3) pin 27 and also has an annular support surface 36 on which the bottom of the roll 19 is arranged * at this soüden rope a tubular by-looking down element 29 is attached, which is provided with longitudinal grooves 31 which rohrföraige element 29 mn to make elastic, This element has a circular crown 30 with a slightly larger one on its outside n diameter, which is formed by two separate 2 parts :. To attach a flangeless coil 20s, which is formed by a cardboard tube 34, to thehalter3stift 18 you only need to place this coil on the upper rope of the pin 27 and push it down. The outer diameter of the circular crown 30 is slightly larger than the opening de , r flangeless roller, so that the crown in its working position puts the tubular element 29 under tension, so that it remains firmly on its carrier, as a result of the radial pressure exerted by the circular crown 30 on the opening surface of the flangeless coil -

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SAD ORfG (NAL

For fastening the flanged coil 19 on the retaining pin 18 cooperates with the annular üagerfläche 36 of the locking element 28 a Plastic ring 32 provided ^ of a central opening as long as a property 35 is provided with an egg.

The inner opening of the hat 35 has a slightly conical shape and in its upper part has a diameter which is smaller than the cisr Itorcht'esser of the pin 27, so that the King 32 iai.1; clorn pen engaged after getting the role wit her :; lower part arranged at the level of 36 ^ hatj vrird the P.ing on the pin 27 so auf_gei3et "Et _(so as to face the upper part of the old -33 splashing 'Terselien-ETI Bpule drucktV

Claims

9 09885/1274

Claims (1)

Claims; ! ähmachine mounting pins for hollen with and without plan target, whereby the unwinding of needle thread takes place with rolls with and without flange, which are fixed relative to their mounting pins, thereby geke η η κ eic Ii η et _s that the mounting ^ pins from a " vertically slightly conical pin (27) consist _P wherein a SpeI-releinent at its lower part is provided (28) which elastically against the Xnneuoberflache the opening presses a flansclilosen coil _f while lower at its upper rope an annular bearing surface (36) for the The end of the flanged coil is provided and there is an interaction with Ginein ring (32) which can be fastened to the pin (2?) To lock the flanged coil on its brackets su. = Ilaging pen according to claim!, Characterized g e k e η η "ζ e i c h η e t that the locking element (28) a solid cylinder part on its upper part has, the diameter of which is larger than the Diameter of the pin (27) and which is an annular iagerflache (36) for the flanged bobbin possesses, differing from the solid Rope from a tubular © <? Element (29) has axial groove eu. extends downwards, which has ropes of a circular crown on its outer surface, the radii of which are larger than those of the fireless coil. 909885/1274 -ο - ■, - ^: ■■: ■. 3. Retaining pin according to Ansprueli 1, thereby. g e Ir e η η ζ e i c h η e t that the ring (32), which with the ring-shaped bearing surface of the Bracket support for the flanged or flangeless roll cooperates, one Central opening and a hub (35) provided with axial grooves, the diameter of the Iu- ■ opening is smaller than the pin diameter. 4. Retaining pin according to claim!, Characterized g e Ic e η η ζ e ic hue t that the pen And the locking element (28) is preferably made of plastic. 909885/1274