DE19624254A1 - Bobbin thread break stop-motion for lock-stitch machines - Google Patents

Bobbin thread break stop-motion for lock-stitch machines

Info

Publication number
DE19624254A1
DE19624254A1 DE1996124254 DE19624254A DE19624254A1 DE 19624254 A1 DE19624254 A1 DE 19624254A1 DE 1996124254 DE1996124254 DE 1996124254 DE 19624254 A DE19624254 A DE 19624254A DE 19624254 A1 DE19624254 A1 DE 19624254A1
Authority
DE
Germany
Prior art keywords
thread
lock
motion
thread break
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE1996124254
Other languages
German (de)
Inventor
Albert Behles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Efteka Kunststoffverarbei GmbH
Original Assignee
Efteka Kunststoffverarbei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Efteka Kunststoffverarbei GmbH filed Critical Efteka Kunststoffverarbei GmbH
Priority to DE1996124254 priority Critical patent/DE19624254A1/en
Publication of DE19624254A1 publication Critical patent/DE19624254A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B51/00—Applications of needle-thread guards; Thread-break detectors

Abstract

A thread break stop-motion for the bobbin thread (5) of a lock-stitch machine features a switch (3) which is triggered off and stops the machine. The switch (3) is activated in the event of a thread break, through the growing angle between the face yarn (4) and the last correct seam point when the needle (2) goes back into the initial position.

Description

Für die Näherin ist der Fadenbruch oder das Fadenende an einer Steppstich Nähmaschine nur durch die nicht mehr geschlossene Nähnaht erkennbar. Unter normalen Umständen bedeutet dies, daß einige Zeit ohne korrekte Naht weitergenäht wird und das Nähgut nachgearbeitet werden muß.For the seamstress, the thread break or the thread end is at a lockstitch Sewing machine only recognizable by the sewing seam that is no longer closed. Under Under normal circumstances, this means that some time without a correct seam is sewn on and the material has to be reworked.

Die bisher patentierten Unterfadenwächter überprüfen den Vorrat an Nähgarn in der Unterfadenspule mittels Drehzahlmeßeinrichtungen und Mikrocomputer oder mittels eines Lichtstrahles der die Nähgarnzuführung überwacht.The previously patented bobbin thread monitors check the supply of sewing thread in the Lower thread spool by means of speed measuring devices and microcomputers or by a light beam that monitors the sewing thread feed.

Diese Verfahren sind alle technisch sehr aufwendig und fehleranfällig.These processes are all technically very complex and prone to errors.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß ein Abschalten der Nähmaschine durch das Fehlen oder den Bruch des Unterfadens mit geringen technischen Aufwand und mit einer sehr hohen Zuverlässigkeit erzielt wird. Das Nachrüsten vorhandener Nähmaschinen ist ohne Probleme möglich.The advantages achieved by the invention are in particular that a Switch off the sewing machine due to the absence or break of the lower thread low technical effort and is achieved with a very high reliability. Retrofitting existing sewing machines is possible without any problems.

Die Erfindung beruht auf einem Schalter, der den sich bei einem Fadenbruch oder Fadenende der Unterspule ändernden Winkels zwischen Naht und Oberfaden registriert und die Nähmaschine anhält.The invention is based on a switch which is in the event of a thread break or Thread end of the bobbin changing angle between seam and upper thread registered and the sewing machine stops.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is shown in the drawing and is in following explained in more detail.

Es zeigt Zeichnung 1, daß der Schalter (3) ohne Funktion bleibt, da Oberfaden (4) und Unterfaden (5) eine korrekte Naht bilden.It shows drawing 1 that the switch ( 3 ) remains without function, since the upper thread ( 4 ) and lower thread ( 5 ) form a correct seam.

Es zeigt Zeichnung 2, daß der Schalter (3) die Nähmaschine anhält, da keine korrekte Naht gebildet wird. Durch den Bruch oder das Fehlen des Unterfaden (5) in der Unterfadenspule (6) wird beim Zurückgehen der Nähnadel (2) in ihren Ausgangspunkt durch den Oberfaden (4) der Schalter (3) ausgelöst. Der Schalter hält die Nähmaschine an.Drawing 2 shows that the switch ( 3 ) stops the sewing machine because a correct seam is not formed. Due to the breakage or lack of the lower thread ( 5 ) in the lower thread bobbin ( 6 ), the switch ( 3 ) is triggered when the sewing needle ( 2 ) returns to its starting point by the upper thread ( 4 ). The switch stops the sewing machine.

Claims (1)

Unterfadenwächter an einer Steppstichnähmaschine, dadurch gekennzeichnet, daß ein Schalter durch den Oberfaden der Nähmaschine, bei Fadenbruch oder Fadenende des Unterfaden, durch den größer werdenden Winkel zwischen Oberfaden und letztem korrekten Nahtpunkt, bei Zurückgehen der Nähnadel in Ausgangsposition, ausgelöst wird und die Nähmaschine anhält.Lower thread monitor on a lockstitch sewing machine, characterized in that a switch is triggered by the upper thread of the sewing machine, if the thread breaks or the end of the lower thread, by the increasing angle between the upper thread and the last correct seam point, when the sewing needle returns to the starting position, and the sewing machine stops.
DE1996124254 1996-06-18 1996-06-18 Bobbin thread break stop-motion for lock-stitch machines Withdrawn DE19624254A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996124254 DE19624254A1 (en) 1996-06-18 1996-06-18 Bobbin thread break stop-motion for lock-stitch machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996124254 DE19624254A1 (en) 1996-06-18 1996-06-18 Bobbin thread break stop-motion for lock-stitch machines

Publications (1)

Publication Number Publication Date
DE19624254A1 true DE19624254A1 (en) 1998-01-02

Family

ID=7797251

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996124254 Withdrawn DE19624254A1 (en) 1996-06-18 1996-06-18 Bobbin thread break stop-motion for lock-stitch machines

Country Status (1)

Country Link
DE (1) DE19624254A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921546A (en) * 1956-04-16 1960-01-19 Stop Motion Devices Corp Stop-motton detector for detecting the condition of bobbin thread in a sewing machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921546A (en) * 1956-04-16 1960-01-19 Stop Motion Devices Corp Stop-motton detector for detecting the condition of bobbin thread in a sewing machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Prof. Dr.-Ing. habil Roland NESTLER, Ing. Horst APPELT, Dipl.-Ing. Ute REISSNER, Untersuchung von Möglichkeiten der Fadenüberwachung an Doppelkettenstich-Industrienähmaschinen in: Textiltechnik, 1975, Nr. 7, S. 442-446 *

Similar Documents

Publication Publication Date Title
DE19624254A1 (en) Bobbin thread break stop-motion for lock-stitch machines
DE1979729U (en) DEVICE FOR MONITORING THE LINE OF THREAD ON STRETCH TWISTING MACHINES AND THE LIKE.
DE1063017B (en) Gripper for lockstitch sewing machines
DE2330892A1 (en) LOOP DEVICE FOR SEWING MACHINES
DE853040C (en) Circular knitting machine with storage device
DE642970C (en) Capsule spinning machine
DE506491C (en) Sewing machine with feed bowls
DE480172C (en) Fabric feeder for thread pulling machines
DE956734C (en) Double rotary hook for high-speed lockstitch sewing machines
DE301479C (en)
EP0008615A1 (en) Needle thread controlling device mounted under the throat plate of a lockstitch sewing machine
DE946583C (en) Bobbin thread monitor
DE844244C (en) Double lockstitch-like seams consisting of an upper thread and a lower thread and stitch-forming tools for forming the seam
DE614059C (en) Single-needle sewing machine with different upper threads that can be used optionally
DE348985C (en) Device for twisting machines to lift the pressure roller when the thread breaks
DE723376C (en) Ring spinning device
DE915848C (en) Thread breakage and knot protection on knitting machines, in particular on flat knitting machines
DE57669C (en) Modification of the decorative stitching device which is patented under No. 51359 Claim 1
AT216319B (en) Process for producing a lockstitch seam and sewing machine for carrying out the process
DE955472C (en) Interval blind stitch sewing machine
CH638254A5 (en) Thread-monitoring apparatus on a quilting machine with a program control and with a thread-break checking device
DE10231466C1 (en) Programmable sewing machine with unit allowing sewing in any selected direction, also includes thread deflector to prevent inadvertent stitching of shuttle thread
DE552066C (en) Circumferential thread take-up for lockstitch sewing machines
DE345926C (en) Free-running gripper for sewing machines
CH430537A (en) Attachment device for stationary bobbins on textile machines, in particular on weaving and winding machines

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8139 Disposal/non-payment of the annual fee