EP1525346A1 - N hmaschinen-nadel mit elliptischer abflachung - Google Patents
N hmaschinen-nadel mit elliptischer abflachungInfo
- Publication number
- EP1525346A1 EP1525346A1 EP03765059A EP03765059A EP1525346A1 EP 1525346 A1 EP1525346 A1 EP 1525346A1 EP 03765059 A EP03765059 A EP 03765059A EP 03765059 A EP03765059 A EP 03765059A EP 1525346 A1 EP1525346 A1 EP 1525346A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cross
- needle
- section
- sewing machine
- machine needle
- 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
Links
- 238000009958 sewing Methods 0.000 title claims abstract 19
- 230000007704 transition Effects 0.000 claims 2
- 230000003292 diminished effect Effects 0.000 abstract 2
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B85/00—Needles
Definitions
- the present invention relates to a sewing machine needle with a shaft extending from a plunger, which on its outer surface - starting from the needle tip region - has at least one thread groove running in the direction of the plunger, the needle cross section, at least in long sections, having a first profile region in the basic shape of a semicircle embedded thread groove and a second profile area adjacent along the semicircular straight line, the basic shape of which has a cross-sectional reduction directed transversely to the semicircular straight line in relation to a mirror-symmetrical semicircle.
- a sewing machine needle with such a reduction in cross section is known from DE 38 10481 AI (sections AA and CC).
- the reduction in cross section provided opposite the thread groove is designed as a flat section which runs essentially straight in cross section, which as such extends over the entire base area of the thread groove projected in cross section and only merges into the profile sides following a circular shape in spatially narrowly delimited edge regions.
- This spatially limited transition goes hand in hand with a profile curvature that is greatly enlarged compared to the radius of the circle, which necessitates a high production outlay, for example when the needle cross section is molded.
- the possible extent of the reduction in cross-section transverse to the semicircular straight line is significantly limited by the fact that the remaining cross-section remaining between the bottom of the thread groove and the flat flattening requires a certain minimum residual width transversely to the semicircular straight line in order to be sufficient with regard to the mechanical loads on the sewing machine needle To offer resistance in particular to bending and kinking.
- the present invention is based on the object of advantageously developing a sewing machine needle of the type described.
- the reduction in cross section is formed by an at least elliptical peripheral edge of the second profile area.
- the second profile area is preferably bordered by an elliptical or elliptical contour, which continuously merges into the contour of the semicircular basic shape of the first profile area at the connection points with the semicircular line.
- the ellipse-like edge contour starting from the intersection with the semicircular straight line, with an increasing approach to the intersection with the axis of symmetry running perpendicular to the semicircular straight line and running through the bottom of the thread line has a continuously increasing radius, i.e. has a continuously decreasing curvature.
- the outer boundary of the second profile area at least in a circumferential length section of the basic ellipse equation
- an approximately elliptical or elliptical edge contour is also understood to mean one in which there are slight deviations from an elliptical edge contour, which also go beyond manufacturing tolerances.
- the maximum cross-sectional width of a reference full circle in the longitudinal direction of the semicircular straight line is also preserved, also the cross-sectional resistance, in particular with respect to that in the sewing direction (i.e. also in Longitudinal direction of the semicircular straight line) occurring bending stress, essentially obtained with such a flattening.
- the elliptical border according to the invention allows smaller curvatures of the edge contour and - with a comparatively equal cross-sectional area - a short length of the circumference.
- a sewing machine needle according to the invention has a groove which extends from the needle tip-side needle eye in the direction of the piston in order to provide sufficient space for the loop thread. to offer the tip of a gripper, boat or the like, thereby increasing the security against false stitch formation.
- the fillet can be embodied, for example, in a known manner as a flat-bed fillet or as a radial fillet with a fillet shape designed in the longitudinal direction of the sewing machine needle. With regard to their position in the needle cross section, it is preferred that the fillet is located in the second profile area, more preferably on the outer circumference, opposite the thread groove.
- the fillet can be embedded in a length section of the sewing machine needle, in which the elliptical cross-section reduction according to the invention is carried out.
- a reduction in cross section beyond the elliptical or elliptical flattening can be achieved at least in regions on the needle cross section.
- the elliptical or elliptical flattening according to the invention and the cross-sectional flattening through the fillet are each oriented transversely to the semicircular straight line, in the case of reduced puncture holes it is also advantageously achieved that the stability of the needle in the sewing direction, that is to say also transversely to the fillet , is retained despite the flattening according to the invention.
- the elliptical or elliptical cross-sectional reduction starting from a needle tip region, for example from a conical tip of the needle tip, extends continuously in the direction of the piston in the longitudinal direction up to the fillet and more preferably beyond the fillet. In this way, in order to achieve particularly small puncture holes in the material to be sewn, the needle cross section can even be limited over the entire puncture length to a cross section composed only of the first and second profile regions defined at the outset.
- the second profile area it is further preferred that it has a basic shape in the form of a semi-ellipse, the longitudinal axis of which has the semi-ellipse circular base coincides.
- the transverse axis of the semi-ellipse lies on a common straight line in the needle cross-section with the mirror-symmetry line of the thread groove.
- the longer of the two semiaxes, which lies on the longitudinal axis of the ellipse preferably has a length which is 5 to 20%, for example a length of about 7%, 10% or 14%, longer than the shorter semiaxis.
- other length ratios may also be appropriate.
- the thread groove in the needle cross section extends exclusively within the first profile area.
- the thread groove has a groove base with a curved surface that is rounded off in the needle cross section, more preferably circularly rounded. With regard to such a rounded thread groove, reference is also made to the applicant's DE 100 26 576 AI, the content of which is also included in the present application for the purpose of incorporating features therefrom.
- an additional thread groove or supplementary groove with a groove base rounded in cross section is provided, which can be arranged essentially opposite to the thread groove embedded in the first profile area in the needle cross section.
- the supplementary channel is accommodated in the second profile area, which is bordered in an elliptical or elliptical manner, so that the corresponding polydirectional wall alignment there directly results in additional stiffening in the profile area reduced by the flattening.
- the aforementioned additional thread channel or supplementary channel can also make an advantageous contribution to the thread guide itself by achieving better thread guide and reducing the risk of the thread breaking.
- the supplementary trough compared to the thread trough, has a trough cross section that is smaller or approximately the same size.
- the channel base of the thread channels and / or the supplementary channel is nestled in cross-section against a circular contour, the diameter of the circular contour being approximately half the length of the semicircular straight line.
- the depth of the supplementary screens is less than or approximately the same as the depth of the thread channel.
- the clear cross-sectional opening width of the supplementary trough is less than or approximately equal to the clear cross-sectional opening width of the thread trough.
- the side flanks of the supplementary trough and / or the thread trough in the needle cross-section can run at an obtuse angle to the lateral surface of the needle shaft.
- the notch effect it has a reducing effect, i.e.
- the side flanks of the thread groove and / or the additional groove in the needle cross section merge convexly rounded into the outer surface of the needle shaft.
- a frustoconical, preferably conical transition is formed between the shaft and the piston, which is larger in cross section, the shaft in the length section between the transition and the fillet and possibly up to the needle tip area has a substantially uniform cross section or a uniform basic shape of the same.
- FIG. 1 is a side view (with partial opening) of a first preferred embodiment of the sewing machine needle according to the invention
- FIG. 2 is a plan view of the sewing machine needle shown in FIG. 1,
- FIG. 3 is an enlarged first sectional view of the sewing machine needle shown in FIG. 2 along section line III-III,
- FIG. 4 is an enlarged second sectional view of the sewing machine needle shown in FIG. 2 along section line IV-IV,
- FIG. 5 is an enlarged sectional view of a second preferred embodiment of the sewing machine needle according to the invention, in which a stronger elliptical flattening is provided compared to FIG. 3,
- 6 is an enlarged sectional view of a third preferred embodiment of the sewing machine needle according to the invention
- 7 is a side view (with a partial opening) of a further preferred embodiment of the sewing machine needle according to the invention with a supplementary groove and without a reinforced shaft section
- Fig. 8 is an enlarged sectional view of the sewing machine needle shown in Fig. 7 along section line VIII-VIII and
- Fig. 9 is an enlarged sectional view of yet another preferred embodiment of the sewing machine needle according to the invention.
- FIG. 1 shows a side view of a first preferred embodiment of the sewing machine needle 1 according to the invention.
- This has a shaft 3 extending from a piston 2.
- the piston 2 is designed as a round piston, but alternatively it would be within the scope of the present invention a flat piston or another suitable piston shape can also be used.
- the shaft 3 has on its lateral surface 4 a thread groove 6 which extends from the needle tip region 5 in the direction of the piston 2 and which extends in the longitudinal direction into a reinforced shaft region 3 'which merges into the piston 2 with a conical widening.
- the needle tip region 5 extends from the needle tip 8 via a subsequent cone section 7 to the needle eye 9.
- the shaft 3 can consequently extend continuously with its slim cross section shown in FIGS. 1, 2, or up to the piston 2 or a piston overlap. extend corridor area.
- Such a conical transition region, which adjoins the piston 2 in FIG. 2 does not have the meaning of a conventional reinforcement of the shaft cross-section that remains constant over a length section, but rather represents a gradual cross-sectional transition from End of the continuously slim shaft to the piston with a larger cross-section.
- FIG. 2 shows a top view of the preferred embodiment of the sewing machine needle 1 according to the invention in the viewing direction II indicated in FIG. 1.
- the section line III-III in FIG. 2 denotes a cross section through the shaft 3 in front of the groove 10, whose shape is shown in Fig. 3.
- the section line IV-IV entered in FIG. 2 denotes a cross section through the shaft 3 in front of the cone section 5, the shape of which can be seen in FIG. 4.
- K designates one serving as a basic geometric or comparative figure
- Circular contour which is shown in dash-dotted lines to clarify its meaning.
- the central axis M which can also be seen in FIGS. 1 and 2, runs through the center of the circular contour K in the direction perpendicular to the drawing plane of the sectional views.
- Two points P1 and P2 lie opposite each other on the circumference of the circular contour K, the cross-sectional edge contour of the half-profile receiving the thread groove 6 (first profile area) nestling against the circular contour K starting from the points Pl and P2 via circumferential length sections 11, 12.
- the first profile region 13, delimited by the connecting line between the points P1 and P2 has the basic shape of a semicircle, so that a semicircular line H is to be referred to with regard to the straight connecting line between P1 and P2.
- the needle cross section also has a second profile area 14, which adjoins the first profile area 13 along the semicircular line H.
- the second profile area 14 has a cross-sectional cross-section c directed transversely to the semicircle line H, which is predetermined by an elliptical outer edge 15 of the second profile area 14 which runs between the points P1 and P2 in the exemplary embodiment shown.
- the length or the dimension of the cross-sectional reduction c can be varied with the position projected onto the semicircular straight line, the smallest dimension (zero) being obtained at the intersections of the edge contour with the semicircular straight line and the largest dimension at the apex S of the second profile area.
- the edge contour of the needle cross-section in FIG. 3 follows the basic equation of an ellipse cited above, with a being the longer semi-axis and b the shorter semi-axis of a semi-ellipse, which forms the basic shape of the second profile region 14, with reference to the specified coordinate directions.
- the basic shape means that within the scope of the present invention, one can also speak of an elliptical or elliptical border if there are clear deviations (for example in the form of a groove, a possible further thread trough or the like) are present.
- the longer semi-axis a also corresponds to the radius of the circular contour K. While the elliptical outer edge 15 of the needle cross section shown in FIG. 3, which lies in front of the fillet 10, fulfills the basic ellipse equation cited, the ellipse-like outer edge 16 of the in FIG.
- FIGS. 3 and 4 shows a cross section lying in front of the cone section 7, which is slightly bulbous compared to the ellipse contour E determined by the equation, so that one can nevertheless speak of an at least approximately elliptical or elliptical outer boundary.
- the respectively shorter semi-axis of the semi-ellipse has the same length b. This means that the elliptical cross-sectional reduction does not only start from the needle tip area 5 in the direction of the piston 2.
- the longer semiaxes a also have lengths that are equal to one another.
- the longer semi-axis a is about 7% longer than the shorter semi-axis b, based on the length of the shorter semi-axis b.
- FIG. 5 shows a sectional view through a second preferred embodiment of the sewing machine needle 1 according to the invention in an area of its shaft 3 which corresponds in position to the section line III-III entered in FIG. 2.
- a larger cross-sectional reduction c is selected therein, based on the same distance from the y-axis.
- the longer semi-axis a is about 20% longer than the shorter semi-axis b (based on the latter).
- FIG. 6 shows a sectional view through a third preferred embodiment of the sewing machine needle 1 according to the invention, which position is also assigned to the section line III-III entered in FIG. 2.
- the edge course 23 of the first profile area 13 follows on both sides of the thread groove 6 starting from the semicircle root line H in the circumferential direction of the semicircular shape beyond circular radii, which are applied as tangents T to the cross-sectional profile of the thread groove 6.
- the thread groove 6 has a groove base 24 with a curved surface that is rounded in the needle cross section.
- the length of the longer semiaxis a in this embodiment is 0.525 millimeters in natural size, and that of the shorter semiaxis b is 0.46 millimeters.
- the longer semiaxis a is about 14% longer in length than the shorter semiaxis b (based on the latter).
- the sewing machine needle according to the invention in side view (FIG. 1) at the end of the cone section 7 on the needle eye side preferably has a thickness of approximately 0.69 millimeters and on the shaft 3 between the fillet 10 and the piston 2 of approximately 0.78 millimeters while the radial depth of the fillet 10 can be about 0.22 millimeters.
- the needle size of the shaft 3 in the length section adjoining the piston 10 can be approximately 0.94 millimeters, in a larger distance from the groove 10 approximately 1.01 millimeters.
- the cross-sectional thickness remaining in the y direction between the base of the thread groove 6 and the elliptical apex S can be about 0.48 millimeters, i.e. the depth of the thread groove 6 be about 0.3 millimeters.
- FIG. 7 shows, in a partially broken longitudinal view, an enlarged further preferred embodiment of a sewing machine needle 1 according to the invention.
- the sewing machine needle shown in FIG. 7 has, in addition to the thread channel 6 also present here, an additional channel 25 opposite it on the needle shaft cross section.
- this is delimited on the piston side by an outlet which is provided in the region of a cone-like transition 26 between the shaft 3 and the piston 2 with a larger cross section.
- the longitudinal section marked with the reference numeral 26 represents a gradual transition from the end of the shaft 3, which is slim over its entire length, ie without a shaft reinforcement that remains constant in long sections, to the piston 2, which is larger in cross section.
- the supplementary screens 25 delimited by a hump 27, the convex apex of which lies at the level of the apex line 20 of the elliptical flattening and to which the fillet 10 is connected on the ear side.
- the recess in the fillet can be seen in the representation as the distance between the apex line 20, which is lengthened for the purpose of clarification and shown in dashed lines, and the solid body edge facing it in the hatched opening. It is shown that the thread channel 6 also has a wedge-shaped outlet in the region of the transition 26 and that the channel depth, as in the case of the additional channel 25, is practically unchanged over the respective channel length.
- the elliptical flattening according to the invention is practically implemented over the entire length of the shaft 3.
- the sewing machine needle shown in FIG. 7 does not have a shaft region that is again reinforced after the transition 26 (see reference number 3 'in FIGS. 1, 2). has, but that here the shaft 3 adjoining the transition 26 up to the hump 27 has a practically uniform cross section.
- FIG. 8 shows an enlarged section through the preferred embodiment of the sewing machine needle 1 according to the invention shown in FIG. 7 along the Section line VIII-VIII.
- FIG. 9 such design features that basically correspond to FIGS. 3 to 6 are given the same reference numerals, although certain deviations are possible with regard to the specific shape of individual such features.
- the groove bottom of the groove 6 is displaced radially outward, the lateral flanks 21, 22 of the thread groove 6 being comparatively steeper and the circumferential length sections 11, 12 up to essentially the mouth of the thread groove 6 follow the circular contour towards the outer surface.
- the lateral flanks 28, 29 of the supplementary trough 25 enclose an obtuse angle with the adjacent, elliptically flattened lateral surface or elliptical outer edge 30 with a rounded transition, while the corresponding transition between the lateral flanks 21, 22 of the thread trough 6 and the circumferential length sections 11 , 12 forms an acute angle.
- the supplementary trough 25 has a smaller trough cross-section than the thread trough 6, both the trough depth and the mouth width being smaller than in the thread trough 6.
- FIG. 9 shows an enlarged sectional view of a further preferred embodiment of a sewing machine needle 1 according to the invention in the shaft area with the position of the sectional plane corresponding to FIG. 8.
- the cross section shown here differs from FIG. 8 in that it has a deepened and wider supplemental trough 25.
- the lateral flanks 28, 29 merge into the elliptical or elliptical outer edge 30 in a concave curve.
- the clear opening width of the supplementary channel 25 already corresponds approximately to the opening width of the thread channel 6, in contrast the channel depth is smaller.
- the thread channel and the supplementary channel have identical or approximately the same cross sections.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10233151 | 2002-07-22 | ||
| DE10233151 | 2002-07-22 | ||
| DE10240289A DE10240289A1 (de) | 2002-07-22 | 2002-08-31 | Nähmaschinen-Nadel mit elliptischer Abflachung |
| DE10240289 | 2002-08-31 | ||
| PCT/EP2003/007896 WO2004009896A1 (de) | 2002-07-22 | 2003-07-18 | Nähmaschinen-nadel mit elliptischer abflachung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1525346A1 true EP1525346A1 (de) | 2005-04-27 |
| EP1525346B1 EP1525346B1 (de) | 2008-03-26 |
Family
ID=30771723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03765059A Expired - Lifetime EP1525346B1 (de) | 2002-07-22 | 2003-07-18 | Nähmaschinen-nadel mit elliptischer abflachung |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1525346B1 (de) |
| JP (1) | JP4124197B2 (de) |
| CN (1) | CN1671904B (de) |
| AU (1) | AU2003251003A1 (de) |
| BR (1) | BR0305680B1 (de) |
| DE (1) | DE50309477D1 (de) |
| WO (1) | WO2004009896A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3347192A (en) * | 1965-05-24 | 1967-10-17 | Union Special Machine Co | Sewing machine needle |
| DE3027534A1 (de) * | 1980-07-21 | 1982-02-18 | Josef 5100 Aachen Zocher | Naehmaschinen-nadel |
| DE8121878U1 (de) * | 1981-07-25 | 1981-11-26 | Fa. Jos. Zimmermann, 5100 Aachen | "tuftingnadel fuer nadelmodule von tuftingmaschinen" |
| DE3810481A1 (de) * | 1988-03-26 | 1989-10-05 | Franz Martin Arndt | Hartmetallnaehmaschinennadel |
| CN2316326Y (zh) * | 1997-11-13 | 1999-04-28 | 青岛市市南亚威福利针厂 | 工业用缝纫机针 |
| DE19921913C2 (de) * | 1999-05-12 | 2001-06-13 | Groz Beckert Kg | Nähmaschinennadel mit schlankem Öhr |
| DE10026576A1 (de) * | 2000-05-30 | 2001-12-06 | Rhein Nadel Maschinennadel | Nähmaschinen-Nadel |
-
2003
- 2003-07-18 CN CN03817468.5A patent/CN1671904B/zh not_active Expired - Fee Related
- 2003-07-18 WO PCT/EP2003/007896 patent/WO2004009896A1/de not_active Ceased
- 2003-07-18 JP JP2004522520A patent/JP4124197B2/ja not_active Expired - Fee Related
- 2003-07-18 DE DE50309477T patent/DE50309477D1/de not_active Expired - Lifetime
- 2003-07-18 AU AU2003251003A patent/AU2003251003A1/en not_active Abandoned
- 2003-07-18 EP EP03765059A patent/EP1525346B1/de not_active Expired - Lifetime
- 2003-07-18 BR BRPI0305680-5A patent/BR0305680B1/pt not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004009896A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003251003A1 (en) | 2004-02-09 |
| WO2004009896A1 (de) | 2004-01-29 |
| BR0305680B1 (pt) | 2011-08-23 |
| JP4124197B2 (ja) | 2008-07-23 |
| CN1671904B (zh) | 2010-06-09 |
| JP2005533547A (ja) | 2005-11-10 |
| EP1525346B1 (de) | 2008-03-26 |
| DE50309477D1 (de) | 2008-05-08 |
| CN1671904A (zh) | 2005-09-21 |
| BR0305680A (pt) | 2004-10-19 |
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