EP1052323A2 - Aiguille de machine à coudre à chas mince - Google Patents

Aiguille de machine à coudre à chas mince Download PDF

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Publication number
EP1052323A2
EP1052323A2 EP00106097A EP00106097A EP1052323A2 EP 1052323 A2 EP1052323 A2 EP 1052323A2 EP 00106097 A EP00106097 A EP 00106097A EP 00106097 A EP00106097 A EP 00106097A EP 1052323 A2 EP1052323 A2 EP 1052323A2
Authority
EP
European Patent Office
Prior art keywords
eye
sewing machine
machine needle
thread
needle according
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.)
Granted
Application number
EP00106097A
Other languages
German (de)
English (en)
Other versions
EP1052323B1 (fr
EP1052323A3 (fr
Inventor
Harry Vornholt
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.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
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 Groz Beckert KG filed Critical Groz Beckert KG
Publication of EP1052323A2 publication Critical patent/EP1052323A2/fr
Publication of EP1052323A3 publication Critical patent/EP1052323A3/fr
Application granted granted Critical
Publication of EP1052323B1 publication Critical patent/EP1052323B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles

Definitions

  • the invention relates to a sewing machine needle, in particular for high-speed sewing machines with high Number of stitches.
  • the one to open the Taphole time is the duration of the first touch of the sewing material through the needle tip to to the eye passage.
  • This taphole opening time is up to a lockstitch machine at 5000 stitches / min approx. 0.5 ms. Opening the tap hole goes with a quick, almost explosive lateral displacement of the material. This results in high frictional forces and thus high ones required puncture forces and a high, for the sewing required, power requirement.
  • the sewing material can be mechanical and also be thermally damaged. It is possible that Fibers or fiber associations (yarns) at the taphole opening be blown up. In addition, the high frictional forces cause a temperature rise on the needle that the melting range more common within a few seconds Synthetic fibers reached. Such fibers are then in the puncture area melted or melted. Another episode are frequently occurring sewing thread breaks.
  • the sewing machine needles are subject especially at high machine speeds high mechanical loads. Increasing machine speeds cause increasing dynamic problems. Masses rotating in the sewing machine can Cause vibrations that affect in particular the affect sewing machine needles clamped on one side. This external forces, such as thread tension, Deflections when hitting the material as well Operating influences, have grown. Therefore become Increased stability uses thicker needles, tighten however, the problems mentioned above.
  • the sewing thread When sewing, the sewing thread is removed from the sewing machine needle pierced through the material. In this process must the sewing thread is protected from damage. Therefore In industrial sewing, the aim is that the sewing machine needle even at extreme changing speeds the sewing thread runs almost smoothly during the entire stitch formation cycle. After the sewing thread thickness in most cases for the sake of the desired Seam strength is specified, the sewing machine needle a sewing thread of specified strength even in the high-speed range run smoothly and the sewing thread protect adequately. It is also important to have too much movement friction between sewing thread and material at high speed to avoid. This cannot be ensured become uncontrollable Thread breaks and skipped stitches.
  • the sewing machine needle according to the invention has a reduced Cross-sectional ear volume with constant eye width and at the same time improved thread protection features on. This means that there must be a tap hole for a sewing thread Strength can be opened less wide, so that friction effects the sewing machine needle and the sewing material become. The cross-sectional reduction of the eye is through an indentation on the gutter side is reached. The eye width is not adversely affected by this, causing sewing threads conventional or predetermined strength can be used can.
  • the indentation changes the characteristic of the puncture force curve.
  • the first peak of power that comes through the eye passage a normal needle is usually dominant significantly reduced.
  • the maximum tap hole expansion takes place comparatively gently only when the upper needle shaft, i.e. when the needle descends slows down and goes to zero.
  • the explosive effect that with the normal needle through the maximum tap hole expansion occurs at the highest penetration rate, is minimized or prevented.
  • the indentation is preferably dimensioned such that the eye walls at least in one place a total height which are slightly less than the height of a area between the tip and the eye.
  • the sewing machine needle at least in a certain Area of the eye a substantially constant total height on what is also delaying the opening movement contributes when piercing.
  • the indentation of the sewing machine needle points at one advantageous embodiment an essentially constant Radius, with the center of curvature approximately can be arranged at the level of the eye.
  • the radius is preferably relatively large and is one advantageous case about 3 to 4 times the nominal Needle size. This is in an un weakened To determine the shaft area.
  • the eye walls are on the opposite Side of the eye preferably straight, wherein here also no or almost no overhang over the eye is available.
  • the wall thickness within an eye wall can vary from one Vary side of the eye to the other. E.g. it is considered viewed advantageously, the eye walls at their the indentation to form the adjacent side with a slightly larger wall thickness than on the side away from the indentation.
  • the side surfaces of the sewing machine needle can parallel to the central axis and in the transverse direction be arranged enclosing acute angles with each other.
  • a particularly advantageous embodiment of the invention Sewing machine needle has a thread groove on, with an undiminished height down to the ear area extends, however, the height of the thread gutter delimiting walls along the entire gutter, in particular up to the eye and to that formed in the eye area Bulge, is constant. This enables one maximum thread protection and at the same time very slim Training the eye and thus low puncture forces and slow tap hole expansion.
  • the shaft of the sewing machine needle is preferably with provided a lateral bend, that of the thread groove opposite side of the sewing machine needle one Fillet.
  • the groove creates space for you Thread gripper that is used to sew seams in Intervention comes.
  • the height is the walls bounding the thread groove in the transition to the Eyes slightly enlarged, which improve the thread protection even more can.
  • the eye In the axial direction, i.e. along the central axis the eye preferably limited by eye bridges, which are rounded trained and arranged offset against the central axis are.
  • the curvature of the eye bridges is dimensioned so that the ends of the eye webs are semicircular.
  • the rounding axes of the ⁇ hrstege are about half Eye height offset against each other.
  • the arrangement is there preferably so that one that runs through the eye Tangent forms an angle with the central axis, which is preferably significantly less than 20 °.
  • a thread running through the eye with a Thickness that corresponds to the thickness of the sewing thread to be used, preferably also closes with the central axis an angle that is less than 20 °.
  • a sewing machine needle 1 is cut out illustrated. It has a shaft 2 which in Figure 1 to the right in a tip 3.
  • the shaft 2 defines a central axis 4 that runs through the tip 3.
  • the shaft 2 does not extend further from one shown clamping part away in a corresponding Attachment of a sewing machine.
  • the sewing machine needle 1 shows in Figure 1 on the left their shaft 2 one rounded on its upper side 5 and on their side surfaces 6, 7 flat cross section.
  • the sewing machine needle 1 is on its lower side 8 a thread groove 9 provided by two side walls 10, 11 is limited.
  • the side walls 10, 11 are polygonal limited or rounded to a gutter bottom 12.
  • the thread groove extends 9 along the shaft 2 over an offset area 14 in which the shaft 2 is cranked, i.e. is bent out laterally.
  • the offset area 14 attaches to the Upper side 5 of the sewing machine needle 1 has a fillet 15 firmly.
  • the back or saddle of the fillet 15 comes up at a short distance from the central axis 4.
  • the Cross section of the sewing machine needle 1 results in this Area from Figure 3.
  • the sewing machine needle 1 in the offset area 14 compared to that in FIG 2 illustrated area widened, but somewhat flatter educated.
  • the cross sections of the shaft 2 in the Cross sections according to Figure 2 and Figure 3 are correct in area roughly match. They are about 12% smaller than that nominal cross-sectional area.
  • a transition area adjoins the offset area 14 17, in which the center of the cross section from an offset position again close the central axis 4 or shifted to the same.
  • the thread gutter 9 extends through the offset area and Transition area 17 to an eye 18, which, as from Figure 1, located near the tip 3 is.
  • the eye leads through the sewing machine needle in one direction 1, with the offset direction in the offset area 14 matches.
  • the ear 18 of two eye walls 19, 20 delimited, between which a passage is trained.
  • the eye walls 19, 20 are on their opposite inner surfaces 21, 22 essentially flat or slightly arched.
  • the two inner surfaces 21, 22 are aligned approximately parallel to one another, while the outer sides 6, 7 here an acute angle include with each other.
  • the eye walls 19, 20 point thereby a slightly larger on the thread channel 9 side Wall thickness than on that lying away from the thread groove 9 Page.
  • the total cross section is up to 10% against the nominal needle size of the sewing machine needle in question 1 decreased.
  • an eye bridge 23 is formed, the end 24 of the eye 18 in the axial direction (direction the central axis 4) limited.
  • the end 24 is with maximum possible radius rounded without edges.
  • the gutter floor 12 of the thread runner 9 thus extends without edges to the end 24 of the ⁇ hrstegs 23.
  • the side walls 10, 11 of the thread channel 9 go from a first, in the Offset area 14, height H to be measured slightly increased height H1 above that in a parallel area 25 can be found in which the thread groove 9 obliquely runs to the central axis 4.
  • the side walls follow the parallel area 25 10, 11 of the thread groove 9 in the eye walls 19, 20 passed over.
  • i.e. in the area of the eye 18 are Eye walls 19, 20, as illustrated in Figure 1, with a Provided indentation 26 through which the lower, in Figure 1, Inlet of eye 18 lying on the side of the thread groove 9 is offset towards the central axis 4.
  • To the eye 18 is followed by a conical region 27 which extends up to the top 3 leads.
  • Radius of the conical region 27 is larger than that Distance of the inlet of the eye 18 in the region of the indentation 26 to the central axis 4.
  • the Indentation 26 is, as illustrated in FIG. 1, through a radius R starting from a center of curvature M set on the side of the thread groove 9 in Extension of the eye 18 can be found.
  • the radius R is about four times the nominal needle size Nm.
  • the eyelet at its end 30th is rounded.
  • the ⁇ hrsteg 29 runs on the of the indentation 25 remote side in a concave base 31 out.
  • the sewing machine needle is for illustration 1 in Figure 5 cut along the section line V-V shown.
  • the cross section is approximately round.
  • the cross section is here against the cross-section that corresponds to the nominal needle size, reduced by about 20%.
  • the sewing machine needle 1 described so far works as follows:
  • FIG. 6 shows the sewing machine needle 1 with a sewing thread 32 illustrates that led through the eye 18 is. It lies in the thread groove 9 and bends from it stretched through the eye 18. In the area of the concave bottom surface 31 it is hollow.
  • the sewing machine needle 1 has after not being inserted into the material. It starts now move towards the sewing material and plunge into it. First, the tip 3 penetrates the material, after which by continued axial movement of the sewing machine needle 1 along its central axis 4 the conical area 27 enters the material and the stitch hole up to the eye 18 expands. The expansion takes place gradually and relatively evenly to a measure so that the sewing thread 32 can be pulled through the tap hole, making it itself around the ⁇ hrsteg 23. This is illustrated in Figure 7.
  • the sewing material glides over the Eye 18, passing through due to the height of the thread gutter the parallel region 25 of that lying in the thread groove 9 Sewing thread 32 is kept away. This can be done with high take-off speed drawn into the tap hole without too much friction between the Sewing thread 32 and the sewing material comes. Especially in the ear area is the sewing thread 32 despite the slim eye design effectively protected. This is made possible by a combination the indentation 26 with a raised or lowered thread groove in the subsequent parallel area 25.
  • the sewing machine needle 1 withdrawn, with the sewing thread 32 initially takes the state illustrated in Figure 8. He solves extends from the eye bridge 23 and then, as illustrated in FIG. 9, a loop 33.
  • the eye bridge 29 prevents thanks to its lateral offset against ⁇ hrsteg 23 Exit of the sewing thread 32 in the direction of the thread groove. Rather, the sewing thread 32 is removed from the eye web 29 Eye 18 pushed out, so that the desired loop sure forms. This noose will continue in the course of the sewing process by a gripper (not shown). The exact formation of this sling enables a flawless sewing process.
  • the sewing machine needle 1 has a slender eye 18 on that directly into a running over the shaft Thread channel merges. This is on the side of the thread groove 9 ⁇ hr provided with an indentation 26 that leads to a small Eye cross-section and thus to a low seam load leads during the puncturing process. In the transition area from the thread groove 9 to the eye 18, these are these Area bounding here measured from the bottom of the wall Thread trough so high that the sewing thread 32 is not exposed and is thus effectively kept away from the sewing material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP00106097A 1999-05-12 2000-03-30 Aiguille de machine à coudre à chas mince Expired - Lifetime EP1052323B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19921913 1999-05-12
DE19921913A DE19921913C2 (de) 1999-05-12 1999-05-12 Nähmaschinennadel mit schlankem Öhr

Publications (3)

Publication Number Publication Date
EP1052323A2 true EP1052323A2 (fr) 2000-11-15
EP1052323A3 EP1052323A3 (fr) 2001-05-16
EP1052323B1 EP1052323B1 (fr) 2003-12-10

Family

ID=7907842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106097A Expired - Lifetime EP1052323B1 (fr) 1999-05-12 2000-03-30 Aiguille de machine à coudre à chas mince

Country Status (5)

Country Link
US (1) US6332417B1 (fr)
EP (1) EP1052323B1 (fr)
JP (1) JP3999441B2 (fr)
DE (2) DE19921913C2 (fr)
ES (1) ES2211403T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3153617A1 (fr) * 2015-10-08 2017-04-12 Groz-Beckert KG Aiguille à coudre et procédé de couture

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10008447C2 (de) * 2000-02-23 2002-07-25 Groz Beckert Kg Nähnadel zum multidirektionalen Nähen
US7022790B2 (en) * 2002-07-03 2006-04-04 Sumitomo Bakelite Company, Ltd. Photosensitive compositions based on polycyclic polymers
CN1671904B (zh) * 2002-07-22 2010-06-09 格罗兹-贝克特公司 具有椭圆平化的缝纫机针
JP4043319B2 (ja) * 2002-08-23 2008-02-06 オルガン針株式会社 ミシン針
JP2004141468A (ja) * 2002-10-25 2004-05-20 Organ Needle Co Ltd ミシン針
DE202004004401U1 (de) * 2004-03-20 2004-05-19 Groz-Beckert Kg Geprägte Tuftingnadel
IL163209A (en) * 2004-07-26 2009-08-03 Yair Eilam A sewing machine needle for sewing with a complex thread
KR100733610B1 (ko) * 2005-05-19 2007-06-28 주식회사유풍 노루발 및 그를 이용한 재봉기
CN103696178A (zh) * 2013-12-19 2014-04-02 吴江市菀坪宝得利缝制设备机械厂 一种高度可调式缝纫机机针
JP6876299B2 (ja) * 2017-07-20 2021-05-26 トヨタ車体株式会社 ステッチ加工部品の製造方法及び縫い針

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322085A (en) * 1965-09-20 1967-05-30 Allied Chem Tufting needle
US3469548A (en) * 1967-06-01 1969-09-30 Singer Co Needle for sewing or the like
US3929082A (en) * 1975-04-16 1975-12-30 Singer Co Needles for tufting or the like
US3954072A (en) * 1975-05-28 1976-05-04 The Singer Company Needles for tufting or the like
JPS5519246Y2 (fr) 1975-11-19 1980-05-07
DE7923552U1 (de) * 1979-01-25 1980-01-24 Wool Research Organisation Of New Zealand Inc., Canterbury (Neuseeland) Nadel fuer tufting-, naeh-, heftmaschinen u.dgl.
DE3027534A1 (de) * 1980-07-21 1982-02-18 Josef 5100 Aachen Zocher Naehmaschinen-nadel
DE3636706A1 (de) 1986-10-28 1988-05-05 Singer Spezialnadelfab Verfahren zum herstellen von kolbennadeln fuer naehmaschinen sowie eine nach diesem verfahren hergestellte kolbennadel
JPH02218390A (ja) * 1989-02-20 1990-08-31 Kyowa:Kk ミシン針

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3153617A1 (fr) * 2015-10-08 2017-04-12 Groz-Beckert KG Aiguille à coudre et procédé de couture
WO2017060056A1 (fr) 2015-10-08 2017-04-13 Groz-Beckert Kg Aiguille de machine à coudre, procédé de fabrication d'une aiguille de machine à coudre et procédé de couture
TWI700409B (zh) * 2015-10-08 2020-08-01 德商葛羅斯貝克公司 縫紉針、其製造方法及縫紉方法
US10753024B2 (en) 2015-10-08 2020-08-25 Groz-Beckert Kg Sewing machine needle, method for producing a sewing machine needle, and sewing method

Also Published As

Publication number Publication date
DE19921913C2 (de) 2001-06-13
JP2000325685A (ja) 2000-11-28
JP3999441B2 (ja) 2007-10-31
US6332417B1 (en) 2001-12-25
EP1052323B1 (fr) 2003-12-10
ES2211403T3 (es) 2004-07-16
DE50004695D1 (de) 2004-01-22
DE19921913A1 (de) 2000-12-07
EP1052323A3 (fr) 2001-05-16

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