EP4038230B1 - Handhabungssystem für nähmaschinen - Google Patents

Handhabungssystem für nähmaschinen Download PDF

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Publication number
EP4038230B1
EP4038230B1 EP20797850.3A EP20797850A EP4038230B1 EP 4038230 B1 EP4038230 B1 EP 4038230B1 EP 20797850 A EP20797850 A EP 20797850A EP 4038230 B1 EP4038230 B1 EP 4038230B1
Authority
EP
European Patent Office
Prior art keywords
crank
fixed
handling system
needle bar
respect
Prior art date
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Active
Application number
EP20797850.3A
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English (en)
French (fr)
Other versions
EP4038230A1 (de
Inventor
Carlo Guerreschi
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.)
Vi Be Mac SpA
Original Assignee
Vi Be Mac SpA
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Filing date
Publication date
Application filed by Vi Be Mac SpA filed Critical Vi Be Mac SpA
Publication of EP4038230A1 publication Critical patent/EP4038230A1/de
Application granted granted Critical
Publication of EP4038230B1 publication Critical patent/EP4038230B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives

Definitions

  • the present invention refers, in general, to a handling system for sewing machines. More specifically, it is a needle bar handling system for a sewing machine.
  • the needles To make the sewing, the needles must pass through the fabric to be sewn and, for this purpose, the needle bar must move in a vertical direction in an oscillating way.
  • the needle bar is connected to a crank which is in turn eccentrically pivoted to a cylindrical element mounted coaxially on a rotating pin.
  • the purpose of this invention is to offer a needle bar handling system for a sewing machine, namely a handling system that can be easily adapted according to the thickness of the fabric to be sewn.
  • Another purpose of the invention is to significantly reduce the setting time of the needle bar stroke of a sewing machine to vary the thickness of the fabric to be sewn or for other needs.
  • Another purpose of the invention is to provide a handling system that is easy to manage.
  • a needle bar handling system of a sewing machine including a needle bar with a vertical shaft to which a crank, in turn connected to a cylindrical element, is connected.
  • the crank is connected to the cylindrical element by means of an adjustment device, the crank being pivoted with a pin to the adjustment device.
  • the adjusting device can adjust the position of the pin with respect to the axis of rotation of the rotating shaft, so as to move the crank and vary the length of the needle bar stroke.
  • the adjusting device comprises a fixed element permanently mounted on the cylindrical element, and a mobile element on which the crank is pivoted, the mobile element being fixable to the fixed element in variable positions.
  • the mobile element can be shifted with respect to the fixed element.
  • the mobile element can be moved with respect to the fixed element in a radial direction with respect to the cylindrical element.
  • the pivot through which the crank is pivoted to the moving element is always arranged on a radius of the cylindrical element.
  • At least one slotted hole can be made in the movable element, which develops in a radial direction with respect to the cylindrical element, the slotted hole being at least one that can be crossed by a screw that can be screwed into a threaded hole in the fixed element.
  • the fixed element can include two lateral shoulders between which the mobile element can move, so as to control the movement of the mobile element when adjusting its position with respect to the fixed element.
  • figure 10 indicates a handling system of the needle bar of a sewing machine as a whole.
  • the handling system 10 includes a needle bar 12 including a vertical shaft 14 and three sewing needles 16 fixed below the vertical shaft 14.
  • a crank handle 18 is connected to the vertical shaft 14, which in turn is pivoted to an adjustment device 20 by means of a pin 19.
  • the adjusting device 20 is fixed to a cylindrical element 22 mounted coaxially on a rotating shaft, not shown in the figures, but configured according to the known art.
  • the adjusting device 20 comprises a fixed element 24 and a movable element 26.
  • the fixed element 24 is permanently mounted on the cylindrical element 22 by means of two first screws 28 and includes two side shoulders 30.
  • the mobile element 26, which is received between the two side shoulders 30, is fixed to the fixed element 24 by means of two second screws 32 which pass through two slotted holes 34 in the mobile element 26.
  • This adjustment is possible because the translation of the mobile element 26 with respect to the fixed element 24 takes place in a radial direction with respect to the cylindrical element 22.
  • the movement system 10 allows, therefore, to vary the length of the needle bar stroke easily and quickly, so as to adjust the action of one or more needles on the fabric as its thickness changes.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (3)

  1. Handhabungssystem (10) für die Nadelstange einer Nähmaschine, umfassend eine Kurbel (18), ein zylindrisches Element (22) und eine Nadelstange (12) mit einer vertikalen Welle (14), mit der die Kurbel (18) verbunden ist, die ihrerseits mit dem zylindrischen Element (22) verbunden ist, das koaxial zu einer rotierenden Welle befestigt ist, wobei die Kurbel (18) mit dem zylindrischen Element (22) mittels einer Einstellvorrichtung (20) verbunden ist, wobei die Kurbel (18) mit einem Stift (19) an der Einstellvorrichtung (20) drehbar gelagert ist, wobei die Einstellvorrichtung (20) geeignet ist, die Position des Stifts (19) in Bezug auf die Drehachse der Drehwelle einzustellen;
    wobei die Einstellvorrichtung (20) ein feststehendes Element (24), das stabil an dem zylindrischen Element (22) angebracht ist, und ein bewegliches Element (26) umfasst, an dem die Kurbel (18) drehbar gelagert ist, wobei das bewegliche Element (26) an dem feststehenden Element (24) in variablen Positionen fixierbar ist;
    wobei das bewegliche Element (26) in Bezug auf das feste Element (24) verschiebbar ist; dadurch gekennzeichnet, dass
    mindestens ein Langloch (34) in dem beweglichen Element (26) ausgebildet ist, wobei das mindestens eine Langloch von einer Schraube (32) durchdrungen werden kann, die in ein in dem feststehenden Element (24) ausgebildetes Gewindeloch geschraubt wird.
  2. Handhabungssystem (10) nach dem vorhergehenden Anspruch, wobei das bewegliche Element (26) in Bezug auf das feste Element (24) in einer radialen Richtung in Bezug auf das zylindrische Element (22) verschiebbar ist.
  3. Handhabungssystem (10) nach einem der vorangehenden Ansprüche, wobei das feststehende Element (24) zwei seitliche Schultern (30) aufweist, zwischen denen sich das bewegliche Element (26) bewegen kann.
EP20797850.3A 2019-10-01 2020-09-30 Handhabungssystem für nähmaschinen Active EP4038230B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201900017627 2019-10-01
PCT/IB2020/059133 WO2021064583A1 (en) 2019-10-01 2020-09-30 Handling system for sewing machines

Publications (2)

Publication Number Publication Date
EP4038230A1 EP4038230A1 (de) 2022-08-10
EP4038230B1 true EP4038230B1 (de) 2024-01-10

Family

ID=69375883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20797850.3A Active EP4038230B1 (de) 2019-10-01 2020-09-30 Handhabungssystem für nähmaschinen

Country Status (6)

Country Link
US (1) US20220325456A1 (de)
EP (1) EP4038230B1 (de)
JP (1) JP2022554073A (de)
CN (1) CN114502789A (de)
MX (1) MX2022003955A (de)
WO (1) WO2021064583A1 (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839972A (en) * 1973-05-03 1974-10-08 Singer Co Adjustable stroke mechanism for tufting machines
GB1438033A (de) * 1973-07-11 1976-06-03
DE8320716U1 (de) * 1983-07-19 1983-11-03 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Naehmaschine mit einer hilfsnadel zum drehen des naehgutes
IT1185580B (it) * 1985-05-27 1987-11-12 Rockwell Rimoldi Spa Dispositivo di comando della corsa dell'ago di una macchina per cucire
IT1203985B (it) * 1987-04-30 1989-02-23 Rockwell Rimoldi Spa Macchina per cucire modulare, predisposta per il comando di dispositivi ausiliari
JPH0246887A (ja) * 1988-08-10 1990-02-16 Iida Shintaro 平針の周方向位置の制御機構を有する皮革または同様な被加工物の縫製用ミシンとこのミシンを用いて縫う方法
US5320053A (en) * 1991-09-30 1994-06-14 Tuftco Corp. Demountable rotary cam for tufting machine
JPH0751480A (ja) * 1993-08-19 1995-02-28 Brother Ind Ltd ミシンの針棒機構
CN203360800U (zh) * 2013-05-20 2013-12-25 浙江宝石机电股份有限公司 一种缝纫机的针杆行程可变机构
CN109972308B (zh) * 2019-04-11 2021-11-02 杰克缝纫机股份有限公司 一种针杆行程调节结构及其缝纫机以及行程调节方法

Also Published As

Publication number Publication date
EP4038230A1 (de) 2022-08-10
CN114502789A (zh) 2022-05-13
JP2022554073A (ja) 2022-12-28
MX2022003955A (es) 2022-04-25
US20220325456A1 (en) 2022-10-13
WO2021064583A1 (en) 2021-04-08

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