DE143407C

DE143407C -

Info

Publication number: DE143407C
Application number: DENDAT143407D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Um mit Hülfe einer Knopflochnähmaschine mit seitlich hin- und herbewegter Nadelstange, welche während der Verriegelung einen größeren Ausschlag ausführt, eine saubere und sichere Verriegelung zu erzielen, wird gemäß vorliegender Erfindung in der Weise vorgegangen, daß der Stoff während der Verriegelung noch weiter, aber langsamer als während der Bildung der Seitennähte in Richtung der Knopflochlänge verschoben wird.In order to use a buttonhole sewing machine with the needle bar moved back and forth to the side, which makes a larger deflection during locking, a clean and To achieve secure locking, the present invention proceeds in such a way that that the fabric goes further during the bartack, but more slowly than during the formation of the side seams in the direction of the Buttonhole length is shifted.

Zur Ausübung dieses Verfahrens ist eine Einrichtung getroffen, die sich im wesentlichen dadurch kennzeichnet, daß das die Verschiebung der Stoffklemme bewirkende Schaltrad unter der Einwirkung zweier Schaltklinken steht, welche auf das Schaltrad in gleicher Richtung einwirken, wobei aber die eine Schaltklinke, welche eine geringere Verstellung des Schaltrades herbeiführt, nur dann zur Wirkung kommt, wenn die andere, eine größere Schaltung bedingende Klinke ausgerückt ist. Diese Ausrückung erfolgt in dem Zeitpunkt, in welchem die Verriegelung beginnen soll. Um das Ausschalten der den größeren TransportIn order to carry out this procedure, a facility has been set up which essentially characterized in that the shifting wheel effecting the displacement of the cloth clamp is under the action of two pawls, which on the ratchet wheel in the same Direction act, but the one pawl, which a smaller adjustment of the ratchet wheel only comes into play when the other, a larger one The pawl causing the circuit is disengaged. This disengagement takes place at the point in time in which the locking should begin. To turn off the the larger transport

bewirkenden Klinke zeitlich genau in Übereinstimmung mit der Vergrößerung des Nadelausschlages während des Beginns der Verriegelung zu bringen, besitzt das Schaltrad besondere Knaggen, welche zur entsprechenden Zeit unter Verwendung geeigneter Zwischenmittel die Umschaltung herbeiführen.effecting pawl exactly in time in accordance with the enlargement of the needle deflection To bring during the beginning of the locking, the ratchet wheel possesses special Knaggen, which at the appropriate time using suitable intermediate means bring about the switchover.

Auf beiliegender Zeichnung ist der Erfindungsgegenstand zur Darstellung gebracht, und zwar bedeutet Fig. 1 eine schematische Darstellung der Stichbildung, Fig. 2 einen Grundriß der den Stoffvorschub bewirkenden Teile, Fig. 3 eine Unteransicht der Maschine und Fig. 4 und 5 eine Seiten- und Stirnansicht derselben. The subject of the invention is shown in the accompanying drawing, and Although Fig. 1 is a schematic representation of the stitch formation, Fig. 2 is a plan of the parts causing the material feed, Fig. 3 is a bottom view of the machine and Figures 4 and 5 are side and end views of the same.

Die herzustellende Naht, welche in Fig. 1 veranschaulicht ist, beginnt bei der mit 1 bezeichneten Stelle, indem die Nadel in bekannter Weise auf- und niedersteigt und dabei gleichzeitig in bekannter Weise einen seitlichen Ausschlag ausführt. Der Stoff erhält dabei eine schrittweise Verschiebung in Richtung des Pfeiles 7, bis die Stelle 2, bei welcher die Verriegelung beginnen soll, bei der Nadel angelangt ist. Während der Verriegelung verschiebt sich der Stoff in Richtung des Pfeiles 8, also umgekehrt wie vorher, jedoch langsamer, so daß bei dem gleichzeitig stattfindenden größeren Nadelausschlag eine Zickzacklinie entsteht, deren einzelne Glieder dicht aneinander liegen, was eine sichere Verriegelung bedingt. Bei der Stelle 4 angelangt, bewegt sich der Stoff weiter in Pfeilrichtung 8, jedoch jetzt mit derselben Geschwindigkeit wie bei der Bildung der Naht 1-2. Dabei macht nach Beendigung der Verriegelung die Nadel wieder ihren kleineren Ausschlag, und der Stoff ist in bekannter Weise in Richtung des Pfeiles 9 so verschoben, daß die Nahtreihe 4-5 gebildet werden kann. An der Stelle 5 angelangt, wird der Stoff immer noch weiter in Pfeilrichtung 8 bewegt, jedoch jetzt wieder langsamer, damitThe seam to be produced, which is illustrated in FIG. 1, begins with the one denoted by 1 Place by the needle rising and falling in a known manner and at the same time a lateral one in a known manner Rash executes. The fabric is gradually shifted towards the Arrow 7 until point 2, at which the locking is to begin, has reached the needle is. During locking, the fabric moves in the direction of arrow 8, in other words, the other way around as before, but more slowly, so that the one that takes place at the same time larger needle deflection creates a zigzag line, the individual links of which are close together lying, which requires a secure locking. Arrived at point 4, the moves Continue the fabric in the direction of arrow 8, but now at the same speed as when forming the seam 1-2. When the locking is finished, the needle makes its smaller one again Rash, and the fabric is shifted in a known manner in the direction of arrow 9 so that the seam row 4-5 is formed can be. When you reach point 5, the fabric continues to move in the direction of arrow 8 moved, but now slower again, so

Claims

in the case of the larger needle deflection then occurring at the same time, the lock 5-6 can again be formed. The displacement of the fabric frame 40 to form the desired two rows of seams can be seen in FIG. A ratchet wheel η carries a guide heart 10 in which the pin 11 of a lever 12 rotatable about pin 13 moves so that when the ratchet wheel η rotates in the direction of the arrow, the lever 12 swings back and forth. He takes along an articulated arm 14 which is connected to the fabric frame 40 by pin 15 so that the latter is guided back and forth in the direction of the longitudinal buttonhole seam. The drive of the ratchet wheel η takes place in the manner shown in FIGS. 3 and 4 by means of two ratchets in and r. The pawl r is always in engagement with the ratchet wheel n; but since it has a smaller deflection than the second pawl m, it usually does not have any effect because the last-mentioned pawl takes the wheel m with it by two or more teeth with every back and forth movement. The pawl m is driven by a shaft ^ which is driven by the main machine shaft 21 through the intermediary of the spur gear d, with the aid of a cam piece e, which guides a two-armed lever g that is rotatable about f (FIG. 4) back and forth lower end h is hinged to a slide i sliding in guides k. This slide takes, in the manner shown in FIG. 3, a ratchet arm /, at the end of which the ratchet m is seated. The latter is disengaged from the wheel η as soon as one of the two opposing pins s (Fig. 3) hits a stop t of the lever ν rotatable about pin u during the rotation of the wheel η, so that then the pawl r alone comes into effect. This point in time corresponds to the start of locking. As long as the pawl r works alone, the fabric frame 40 also receives the slight displacement required for locking in the direction of the buttonhole length. The pawl r is also driven (FIGS. 3 and 4) by the two-armed lever g, in that it acts on a two-armed lever q rotatable by jp through the intermediary of a roller o and swings the same back and forth. Since it is essential to bring the point in time at which the larger needle deflection should also take place at the beginning of the locking exactly in accordance with the point in time at which the pawl r (Fig. 3 and 4) works alone and causes the lower feed, the present invention proceeds in such a way that further projections 17 are provided on the wheel η (FIG. 3), which at the right time cause the pivotable angle lever 19 to swing out, consequently shown in FIGS. 3 and 5 Way a lever 20 is moved outward and thereby the stop 24, which usually limits the movement of the machine needle 30 to the left, shifts such that the spring 28 (Fig. 5) the guide frame 25 for the needle and thereby the needle 30 itself further can move to the left if this is permitted by the position of the cam 2g sitting on the shaft \ and causing the needle 30 to swing to the right. The stop 24 is seated on a lever 34 and can be adjusted in this with the aid of a screw 23. If the lever 20 is adjusted by the angle lever 19 when the lock occurs, the lever 34 and the stop 24 are taken along so that the greater needle deflection then takes place. Patent-A ν Proverbs:

1. Method of locking buttonholes with sideways reciprocating Needle bar which executes a larger deflection during locking, characterized in that, um to achieve a neat and secure interlocking of the fabric during interlocking even further, but more slowly than when the side seams of the buttonhole were being formed is moved in the direction of the buttonhole length.

2. To exercise the under 1 :: protected method, a device, characterized in that the shifting of the cloth clamp causing ratchet wheel under the action of two

, Ratchets, which act on the ratchet wheel in the same direction, wherein but the one ratchet that causes less adjustment of the ratchet wheel, can only come into effect when the other pawl, which causes a larger shift, is disengaged.

3. A device according to claim 2, characterized in that the the Fabric feed effecting indexing wheel has special lugs (17), which at the same time with the occurrence of the locking advance, the necessary change of the Cause needle deflection.

For this purpose ι sheet of drawings.