EP1285113B1 - Nähmaschinen-nadel - Google Patents

Nähmaschinen-nadel Download PDF

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Publication number
EP1285113B1
EP1285113B1 EP01936316A EP01936316A EP1285113B1 EP 1285113 B1 EP1285113 B1 EP 1285113B1 EP 01936316 A EP01936316 A EP 01936316A EP 01936316 A EP01936316 A EP 01936316A EP 1285113 B1 EP1285113 B1 EP 1285113B1
Authority
EP
European Patent Office
Prior art keywords
section
blade
arching
cross
sewing machine
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.)
Expired - Lifetime
Application number
EP01936316A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1285113A1 (de
Inventor
Johann Willems
Herbert Jansen
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 EP1285113A1 publication Critical patent/EP1285113A1/de
Application granted granted Critical
Publication of EP1285113B1 publication Critical patent/EP1285113B1/de
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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • D05B85/02—Needles with slotted eyes, i.e. with a slit leading to the eye for thread insertion

Definitions

  • the invention relates to a sewing machine needle with outgoing from a piston shaft, which has on its lateral surface - starting from the tip-side eyelet - at least one extending in the direction of the piston thread groove whose groove bottom, designed as lying in the transverse direction of the shaft curvature surface and whose From the Wolbungs Scheme end point outgoing side edges form a broadening towards the lateral surface channel cross-section.
  • a sewing machine needle with classic round shank cross section is through the DE 31 49 383 A1 known (Fig. 4).
  • the yarn channel is of rectangular contour; the parallel side flanks are connected by a groove at right angles to it, also as a flat flank.
  • DE-PS 193 006 is a trapezoidal thread groove contour removable.
  • the side edges diverge towards the lateral surface. This leads to a considerably broadened channel cross-section.
  • the bottom of the channel is predominantly flat and passes over a short concave rounding into the wall sections of the side flanks.
  • this sewing machine needle is assigned a relatively flat supplementary chute in diametrically opposite direction to the yarn chute (FIG. 3).
  • a sewing machine needle with a needle body and a shaft and a substantially cylindrical piston is known.
  • the piston is formed by an enveloping body surrounding the needle body.
  • a thread groove is formed, which extends into the region of the piston in and serves as anchoring point for a sheet or wire, which is wound around the shaft to form the piston.
  • the DE 32 35 153 A1 shows a generic sewing machine needle whose groove bottom is designed as lying in the transverse direction of the shaft arching surface, which adjoins diverging aligned side edges and which side flanks to a lateral surface form broadening channel cross-section (Fig. 11a).
  • the gutter bottom is more closely resembling a Kerbtal.
  • the invention has the task of forming a sewing machine needle of the type described in thread-fair gutter contour resistant to bending load forces.
  • the curvature of the curvature surface is designed such that two of a shaft cross-section beyond the shaft center and on the median longitudinal plane of the shaft point (vertex) to the curvature gradient tangent (tangent application point) a Erreit ceremoniessokoraum cross-section and a smaller or maximum area equal, above defining the gusset portion of the tangent application point, the latter being formed on the one hand by the camber line of the camber surface and on the other hand by the tangent applied in the vault cusp and the radials perpendicular thereto and the straight line passing through the tangent point parallel to that through the center of the camber Shank and the center of curvature extending longitudinal center plane.
  • the concave curve course contributes to achieving a polydiretationalen wall alignment of the shaft and thus to increase the resistance to bending forces.
  • Such sewing machine needles or a so-called double trough needles have practically a double-T profile, wherein the trough-forming transitions in the manner described with respect to a notch effect are out of danger. It is favorable that with two opposing yarn channels of the same geometry, according to the characteristics of the second claim, the vertices of the applied tangents in the region of the shaft longitudinal center axis, of the center so, meet or even overlap.
  • the sewing machine needle 1 which can be produced in the conventional reducing method by means of a circulating press by way of cold stretching as a blank, which can be produced in a chip-removing manner or even largely without post-processing by means of compression molding / trimming, is basically a circular cross-section. This applies to the larger cross-section piston 2 as well as for the largest length section engaging shaft 3 of the sewing machine needle 1.
  • the piston 2 passes via a truncated cone-like projection 5 in the significantly reduced cross-section of the shaft 3, which terminates with a needle tip 6.
  • the needle tip 6 extends in the eye-side end portion 1 'of the sewing machine needle 1.
  • the actual tip is 7.
  • the eye is denoted by 8.
  • the so-called groove throat 9 forms an enlarged gripper space for the gripper, not shown, a sewing machine.
  • the thread groove 11 extends between the eye 8 in the end portion 1 'and the neck 5 continuously and substantially of the same depth. Only the end-side end region wedges on the truncated cone surface of the neck 5 going out.
  • the piston 2 itself is uniformly cylindrical. He could also be slightly conical or stepped. Its free end section bears the reference numeral 1 ". This piston-side end section is chamfered.
  • the further thread groove 13 is spatially closed in front of the eyelet 8, there or on the one hand by the aforementioned hump 10 and on the other hand by the opposite side of the gutter rising lateral surface of the neck 5. Again, there is the mentioned with respect to the groove 11 wedges.
  • the longitudinal extension of the grooves 11, 13, 14 is coincident, namely space parallel to a longitudinal center axis x-x stellierenden center Z of the shaft.
  • relatively Phynstieligen shaft 3 is paid to a stable design, which provides the resilient compliance as well as a sufficient thread guide cross-section, especially with respect to the thread groove eleventh
  • the groove base 12 is designed as lying in the transverse direction of the shaft 3 arching surface W.
  • The takes less than a semicircle.
  • Camber area end points merge into sidewalls 15.
  • the latter take a diverging course and thus provide a broadening channel cross-section 16 towards the lateral surface 4. This lies above the diameter D of the arc-shaped curvature profile of the curvature surface W.
  • the opening angle between the side edges 15 is approximately 20 to 30 °.
  • the course of 15 is mirror-symmetric.
  • the diameter D of the arcuate curvature profile of the curvature surface W substantially corresponds the radius R of the basically circular cross-section having shaft 3 of the sewing machine needle. 1
  • the groove base 12 arcuately concave arching, shown circular geometry is set so that the camber center y is still in the basic cross-section of the shaft 3, but the radius of the circle is not exhausted depth.
  • the distance to the center Z can be seen. It essentially corresponds to half the radius dimension of the diameter D.
  • the center Z of the shaft 3 and the center of curvature y of the circular curvature surface W extend in a common longitudinal center plane E-E.
  • the other side of the shaft 3 is, for example, the further yarn channel of the double-trough sewing machine needle 1 designated above with 13.
  • the curvature of the curvature surface W is designed such that two of a in the shaft cross-section beyond the center Z of the shaft 3 and on the said longitudinal center plane EE of the shaft 3 lying point P1 to the curvature curve applied tangents T a Erreit ceremoniessokoraum cross-section 17 and a smaller or maximum area equal, above the tangent application point 19 lying gusset section 18 define.
  • Both the broadening groove cross-section 16 or channel entrance yielding eraser free space cross-section 17 and the aforementioned gusset section 18 are shown in the form of narrow-hatched fields. For this purpose, a rectangular thread channel of common type is shown for comparison.
  • the gusset sections 18 fill out the right-angled corners of the thread channel 11 of old type in a concave, rounded manner. So corner notches are avoided.
  • the broadening clearance cross-section 17 is cleared away by creating a broadening channel cross-section 16. The transitions of the so diverging subsequent side edges 15 to the lateral surface 4 out, as shown, be convex rounded.
  • the gusset portion 18 is formed on the one hand by the curving line 12 rounded out curvature line, ie curvature surface W, and on the other hand defined by the tangent T, applied in the vault crest 19 and the right angle (angle alpha) standing radials 20 and extending through the tangent point P1 line G, lying parallel to the longitudinal center plane EE passing through the center Z of the shaft 3 and the center of curvature y.
  • Fig. 5 shows with respect to the additional yarn groove 13 a comparable geometry, but the vault center y of this yarn groove 13 is further offset radially outward, remaining in the longitudinal center plane EE.
  • the camber center point y of this curvature surface W lies within the shaft shortly after the lateral surface 4, which is intended as a continuous line.
  • the reference numerals are applied analogously, without further textual repetition.
  • the vertices of the applied tangents T meet in the region of the central axis xx of the shaft, ie of the center Z of the shaft 3, recognizable even in overlapping association.
  • the apex of the tangents T of the thread groove 13 is P2 designated.
  • the overlapping zone Ü extends, viewed from the thread groove 11, beyond the center Z.
  • the fields also vary in size with respect to the width of the broadening space transverse section 17 and the gusset section 18.
  • the former is smaller in area than the gusset section 18. Nevertheless, the rounding of the transition areas to the lateral flanks 15 achieved by the arching surface W remains here.
  • the supplementary channel 14 - the channel bottom is denoted by 14 '- tode configuration with respect to these edges recognizable obtuse (angle beta).
  • the flanks set here by the foothills of the curvature surface W pass over into the lateral surface 4 of the shank 3 via convex edge rounding.
  • test results have shown that the needle was 10% stiffer in the eye direction and 7% stiffer in the transverse direction. It was a needle that had the lower thread groove 11 described for Fig. 5.
  • Tests on a double gutter needle as shown in FIG. 5 showed a 25% higher stiffness in the eye direction and 20% higher stiffness of the needle body in the transverse direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP01936316A 2000-05-30 2001-05-03 Nähmaschinen-nadel Expired - Lifetime EP1285113B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10026576A DE10026576A1 (de) 2000-05-30 2000-05-30 Nähmaschinen-Nadel
DE10026576 2000-05-30
PCT/EP2001/004988 WO2001092629A1 (de) 2000-05-30 2001-05-03 Nähmaschinen-nadel

Publications (2)

Publication Number Publication Date
EP1285113A1 EP1285113A1 (de) 2003-02-26
EP1285113B1 true EP1285113B1 (de) 2007-06-20

Family

ID=7643963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01936316A Expired - Lifetime EP1285113B1 (de) 2000-05-30 2001-05-03 Nähmaschinen-nadel

Country Status (10)

Country Link
EP (1) EP1285113B1 (ja)
JP (1) JP2003534854A (ja)
KR (1) KR100694324B1 (ja)
CN (1) CN1218080C (ja)
AU (1) AU6225501A (ja)
BR (1) BR0106677B1 (ja)
CZ (1) CZ299928B6 (ja)
DE (2) DE10026576A1 (ja)
PT (1) PT1285113E (ja)
WO (1) WO2001092629A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009896A1 (de) * 2002-07-22 2004-01-29 Groz-Beckert Kg Nähmaschinen-nadel mit elliptischer abflachung
EP3153617B1 (de) * 2015-10-08 2018-07-04 Groz-Beckert KG Nähmaschinennadel und nähverfahren
CN108221193B (zh) * 2018-03-22 2024-04-19 长沙学院 一种转动式多点张紧定位装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193006B (de) * 1962-03-13 1965-05-20 Zimmermann Fa Jos Verfahren zum Stampfen der Fadenfuehrungs-rinnen von Naehmaschinennadeln und Matrize zur Ausfuehrung des Verfahrens
DE3149383A1 (de) * 1981-04-04 1982-11-18 Rhein-Nadel Maschinennadel GmbH, 5100 Aachen Naehmaschinennadel
JPS6027554B2 (ja) * 1981-12-25 1985-06-29 オルガン針株式会社 ミシン針
DE3235153A1 (de) * 1982-09-23 1984-03-29 Rhein-Nadel Maschinennadel GmbH, 5100 Aachen Verfahren zur herstellung von naehmaschinennadeln
DE3732948C2 (de) * 1987-09-30 1995-08-03 Rhein Nadel Maschinennadel Nähmaschinennadel und Verfahren zu ihrer Herstellung
DE3810481A1 (de) * 1988-03-26 1989-10-05 Franz Martin Arndt Hartmetallnaehmaschinennadel

Also Published As

Publication number Publication date
BR0106677A (pt) 2002-11-26
CN1386149A (zh) 2002-12-18
CN1218080C (zh) 2005-09-07
DE50112643D1 (de) 2007-08-02
PT1285113E (pt) 2007-09-05
CZ299928B6 (cs) 2008-12-29
CZ2002287A3 (cs) 2002-04-17
EP1285113A1 (de) 2003-02-26
DE10026576A1 (de) 2001-12-06
JP2003534854A (ja) 2003-11-25
KR20020067491A (ko) 2002-08-22
KR100694324B1 (ko) 2007-03-12
BR0106677B1 (pt) 2010-10-19
AU6225501A (en) 2001-12-11
WO2001092629A1 (de) 2001-12-06

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