EP1303658A1 - Zungennadel mit abgesetztem zungenschlitz - Google Patents
Zungennadel mit abgesetztem zungenschlitzInfo
- Publication number
- EP1303658A1 EP1303658A1 EP01953902A EP01953902A EP1303658A1 EP 1303658 A1 EP1303658 A1 EP 1303658A1 EP 01953902 A EP01953902 A EP 01953902A EP 01953902 A EP01953902 A EP 01953902A EP 1303658 A1 EP1303658 A1 EP 1303658A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tongue
- slot
- latch
- latch needle
- 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
- 238000009940 knitting Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 5
- 210000002105 tongue Anatomy 0.000 description 123
- 238000000034 method Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
- D04B35/04—Latch needles
Definitions
- the invention relates to a latch needle, in particular for knitting machines, with the features of the preamble of patent claim 1.
- Switch needles are used for various types of knitting machines.
- a latch needle is known from German patent specification 1113537.
- the latch needle has a needle body with a hook formed thereon at the end.
- the side walls of the tongue slot and the side surfaces of the tongue shaft serve to guide the tongue laterally. This allows the tongue to rest with its free end, the so-called tongue spoon, on the tip of the hook and thus close the thread space. From this closed position, the tongue can pivot into the reserve, in which it releases the thread space.
- a pivot pin or pin is used to pivot the tongue.
- the pivoting movement should be possible as smoothly as possible. Modern knitting machines often need needles with very smooth tongues. The tongues should be guided as precisely as possible. Ease of movement must be given for both new and older needles. Needles with stiff tongues knit unevenly and thus create a poor stitch pattern.
- Some machines require that the tongues fall back on their own weight during the knitting process. If this is not reliably the case, there is a risk that the tongues parts of the machine, e.g. touch the thread guide apron and be bent as a result.
- the tongue can be moved easily by increasing the tongue play. This measure also leads to dirt, fiber residues and the like penetrating into the tongue slot less impairing the smooth movement of the tongue.
- an increased tongue play worsens the guidance of the tongue even when the needle is new. Then she can no longer hit the hook precisely with her tongue • spoon and thus no longer reliably close the thread space. With increasing wear and tear, the tongue is less and less good performed, which in turn can affect operational reliability.
- Another problem can be that with increasing play between the tongue shaft and tongue slot, the thread becomes jammed between the tongue shaft and the side wall of the tongue slot, which affects the smoothness of the tongue and can lead to the needle becoming inoperative. Based on this, it is an object of the invention to provide a latch needle with a precisely guided, smooth-running tongue.
- the latch needle according to the invention has a latch slot which is delimited by two side walls, the inside of which lie opposite one another.
- the inner sides are each divided into at least two surface areas, one of which is in the immediate vicinity of the storage device and thus forms a storage area.
- This surface area preferably surrounds the storage device.
- This surface area serves to guide the tongue and thus limits its lateral bearing play.
- the other surface area is spaced from the bearing device and defines a comparatively larger slot width.
- the side wall is set back to a certain extent in this surface area, so that a free space is created between the tongue shaft and the side wall of the tongue slot. This promotes easy tongue movement.
- the resulting free space between the tongue shaft and the side wall can accommodate fiber filaments without significantly reducing the tongue's ease of movement. In particular, the jamming of threads or fibers or filaments and dust between the side wall and tongue shaft of the tongue can be prevented.
- the latch needle according to the invention combines improved guidance of the tongue with reduced frictional resistance and additional free space for fibers and filaments. This applies in particular if the measure according to the invention is not limited to only one side wall, but is applied to both side walls. The result is a latch needle which is symmetrical with respect to a central plane on which the pivot axis of the latch is perpendicular. With this latch needle, the frictional resistance of the tongue is reduced on both sides of the same.
- the tongue slot has a smaller width at at least one location in the vicinity of the bearing device than at at least one other location at a greater distance from it.
- the transition between the corresponding surface areas of the inside of the side wall can be designed as an edge, as a curve or as a step.
- the edge between the two surface areas can be designed as a sharp or rounded edge.
- the surface areas can be flat or curved. In particular, the surface area arranged away from the bearing device can be curved.
- the other surface areas are preferably arranged at the slot opening.
- the relevant surface area of the wall can be set back and take such a shape that a projection is formed on both sides of the tongue shaft on the relevant side wall, which acts like a washer arranged on the pin. These projections center and guide the tongue in the middle of the tongue slot.
- the storage device of the latch needle is preferably a continuous or a split pin. The latter can be produced by pressing parts of the side wall into a tongue opening in a forming process. The pin can be pressed out on the side wall or can also be produced by inserting a separate pin.
- the lateral play of tongues in the area of the bearing device is preferably only a few hundredths of a millimeter, for example approximately 0.02 millimeters or less.
- the tongue play in the area of the enlarged tongue slot is preferably significantly larger, for example larger than 0.03 millimeters.
- This gap or slot can have a uniform thickness or can be wedge-shaped. It preferably extends at least over part of the pivoting range of the tongue.
- the gap or slot can be divided into sections. The sections can e.g. extend from swivel end positions to close to the bearing point.
- the expanded tongue slot area can also extend further to the posterior of the tongue.
- Fig. 1 a latch needle in a detail perspective and schematic representation
- FIG. 3 shows the latch needle according to FIGS. 1 and 2, in a partial and cross-sectional view, on a different scale
- FIG. 4 shows a modified embodiment of the latch needle in a cross-sectional illustration, in a simplified view
- FIG. 5 shows a modified embodiment of the latch needle in a cross-sectional illustration, in a simplified view
- Fig. 6 shows a further modified embodiment of the latch needle, in a partially sectioned and schematic side view.
- a tongue needle 1 is illustrated in principle in FIG.
- the latch needle 1 has a needle body 2, at the free end of which a hook 3 is formed. This ends in a hook tip 4, which serves as an abutment and support for a tongue 5 pivotably mounted on the needle body 2.
- a tongue slot 6 is formed in the needle body 2, which is delimited by two side walls 7, 8.
- the side walls 7, 8 are each mirror-symmetrical to one another and arranged parallel to one another.
- the tongue 5 has a tongue shaft 11 which projects with one end 12 into the tongue slot ⁇ .
- the end 12, as can be seen in particular from FIG. 2, is provided with a tongue opening 14 which serves to support the tongue 5.
- the tongue 5 has a tongue spoon 16 which has a recess 17 (tooth) on the hook side.
- the present embodiment is therefore a tongue-toothed needle.
- a hook can be provided in the hook 3 or its hook tip 4, into which a correspondingly tapered section of the tongue 5 fits. In the closed position (FIG. 2), the tongue 5 closes the interior of the hook 19.
- a pin 18, which consists of two half pins 18a, 18b, as can be seen in FIG. 3, serves for pivotably mounting the tongue 5 in the tongue slot 6.
- the half pins 18a, 18b are formed by wall parts of the side walls 7, 8, which have been pressed out of them in a pressing or punching process and into the tongue opening 17.
- the tongue 5 has two side surfaces 21, 22 which, for example, can be flat and parallel to one another. If necessary, the side surfaces 21, 22 can also be oriented at an angle to one another, so that the tongue 5 is approximately wedge-shaped.
- the side surfaces 21, 22 can be planar, arched, stepped or otherwise contoured.
- the tongue 5 is preferably symmetrical to a central plane on which a pivot axis S defined by the pin 18 is perpendicular.
- the side walls 7, 8 are also symmetrical to this central plane, which is indicated by a dash-dotted line E in FIG. 3.
- the following description of the side wall 7 thus applies accordingly to the side wall 8.
- the side wall 7 has an inside that is divided into two surface areas 23, 24.
- the surface areas 23, 24 are separated from one another and define different slot widths.
- the surface area 24 is arranged in the immediate vicinity of the bearing device formed by the pin 18 and lies in particular in the area of the bearing device, i.e. of the pin 8, a slot width which is only slightly larger than the width of the tongue 5 present here. This results in a bearing gap 25, 26 of a few 100ths of a millimeter on the bearing device on both sides of the tongue 5. For example. the bearing play defined by both bearing columns 25, 26 is limited here to 0.02 mm.
- a gap 28, 29 is defined between the respective side surface 21, 22 of the tongue 5 and the surface region 23, the mean or average width of which is greater than the mean or average width of the bearing gap 25, 26.
- the depth of the gap is determined by the height of the area 23 determined.
- the surface area 23 has a height (measured between the needle top 31 and the opposite needle back) which is preferably greater than half the distance between the bearing pin 18 and the needle top.
- the thickness of the side wall 7, 8 can serve as an alternative reference point for the depth of the recess - the height of the surface area 23 is preferably greater than this. In this way, the desired smoothness and the desired precision are obtained.
- the latch needle 1 described so far works as follows:
- the latch needle 1 executes a reciprocating movement in which its needle body 1 is moved along its longitudinal direction.
- the tongue 5 carries out a back and forth swiveling movement about the swiveling axis S from a closed position illustrated in FIG. 2 via an intermediate position according to FIG. 1 and back to a back position.
- the thread slides over the top 9, 10 of the side walls 7, 8, driven by the tongue shaft 11, into the hook interior 19.
- the latch needle 1 described so far has an improved knitting behavior:
- the tongue 5 of the latch needle 1 is in the latch slot 6 through its end 12 and guided on the pin 18.
- the guidance takes place only through the surface areas 24, of the side walls 7, 8, but not through the surface areas 23.
- the tongue shaft 11 is thus free in the tongue slot 6 and in particular touches the surface areas
- the tongue 5 is guided through the surface areas 24 at its end 12 so precisely that the tongue spoon 16 hits the hook 3 or the hook tip 4 with a slight center deviation.
- the precise guidance of the tongue 5 represents a wear reserve, i.e. even if the lateral play of the tongue 5 increases with increasing wear, it remains within permissible tolerances.
- the recessed surface areas 23 create free spaces with the gaps 28, 29, which also prevent or reduce an inhibition of the movement of the tongue 5 if there is oil on the side surfaces 21, 22 of the tongue 5 and / or the inner sides of the side walls 7, 8, Deposit fiber residues or dirt.
- the tongue slot 6, as illustrated in FIG. 2, extends through the needle body 2 and is open both on the upper side (upper side 31 of the needle) and on the rear side.
- the mouth of the tongue slot 6 on the upper side of the needle is widened by an additional milling or embossing which produces the step 27 and the surface areas 23.
- the surface area 23 thus extends from a hook-side end 32 over a central area 33, which can be found approximately above the bearing device, to an end region 34, which is taken up by the shaft 11 of the tongue 5 when it is in reserve. This surface area 23 thus extends at least almost over the entire swivel range of the tongue 5.
- This special design of the surface area -.- 23 makes the guidance of the tongue 5 precise, particularly in the closed position and in the back position, because the shaft 11 of the tongue 5 is in these positions deeper into the narrower tongue slot area defined by the surface areas 24. Ultimately, this is achieved in that the surface area 23 follows the contour of the needle top 31 with an approximately constant width.
- the surface area 23 can have a shape that deviates from the strip shape, so that the step 27 no longer follows the contour of the needle top 31.
- the area 23 can also be divided into partial areas 23a, 23b, as illustrated, for example, in FIG. 6. This makes it possible to combine a very large reduction in tongue friction with precise storage and guidance of the same.
- an edge 37 is provided instead of the step 27, which edges the surface areas 23, 24 separates.
- the bearing device has not been shown in FIG. 4. This is symbolized solely on the basis of the swivel axis S. It can be formed by a pin as well as by a pin.
- the surface areas 23, 24 are, as in the previous embodiment, essentially flat, but different than in the above-described embodiment according to FIG. 3, here (FIG. 4) not arranged parallel to one another.
- the surface areas 23 form a funnel-like extension of the tongue slot 6 in the direction of the upper side 31 of the needle.
- the gaps 28, 29 thereby become wedge-shaped, the gap width at least in the area of the mouth of the tongue slot 6 being greater than the distance between the area areas 24.
- the middle area is preferred.
- the gap width, which is to be measured approximately in the middle of the surface area 23, is already clearly, ie a few thousandths of a millimeter larger than the gap width in the surface areas 24.
- the latch needle 1 has a latch slot 6, the side walls 7, 8 of which are profiled on their inner sides.
- a tongue 5 is mounted in the tongue slot 6, for example by means of a pin 18.
- the areas of the inner side of the side walls 7, 8 which are directly adjacent to the pin 18 serve to guide the tongue 5 laterally and define a small amount of play therewith. A precise bearing is formed in this way.
- the remaining tongue slot 6 can have a larger slot width in order to reduce the friction of the tongue 5 in the tongue slot 6 as much as possible.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10035826 | 2000-07-22 | ||
| DE10035826A DE10035826C2 (de) | 2000-07-22 | 2000-07-22 | Zungennadel mit abgesetztem Zungenschlitz |
| PCT/DE2001/002567 WO2002008505A1 (de) | 2000-07-22 | 2001-07-10 | Zungennadel mit abgesetztem zungenschlitz |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1303658A1 true EP1303658A1 (de) | 2003-04-23 |
| EP1303658B1 EP1303658B1 (de) | 2006-03-29 |
Family
ID=7649919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01953902A Expired - Lifetime EP1303658B1 (de) | 2000-07-22 | 2001-07-10 | Zungennadel mit abgesetztem zungenschlitz |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6564589B2 (de) |
| EP (1) | EP1303658B1 (de) |
| JP (1) | JP3878129B2 (de) |
| AT (1) | ATE321904T1 (de) |
| DE (2) | DE10035826C2 (de) |
| WO (1) | WO2002008505A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7383497B2 (en) | 2003-01-21 | 2008-06-03 | Microsoft Corporation | Random access editing of media |
| DE102012202881B4 (de) | 2012-02-24 | 2026-03-19 | A.H. Meyer Maschinenfabrik Gmbh | Steppvorrichtung |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1433123A (en) * | 1921-11-15 | 1922-10-24 | Fred W Corey | Knitting-machine latch needle |
| DE586678C (de) * | 1932-02-21 | 1933-10-24 | Franz Meiwald | Strickmaschine mit Zungennadeln |
| US1991140A (en) * | 1934-02-28 | 1935-02-12 | Acme Knitting Machine & Needle | Knitting machine needle |
| DE1113537B (de) | 1954-06-25 | 1961-09-07 | Karl Steinhof App Fabrik | Handstrickapparat, Zungennadel fuer einen Handstrickapparat, und Verfahren zur Herstellung der Zungennadel |
| DE1906892A1 (de) * | 1969-02-12 | 1970-05-14 | ||
| US3934109A (en) * | 1972-06-23 | 1976-01-20 | The Torrington Company | Latch pivot for latch needle |
| US4020319A (en) * | 1974-02-07 | 1977-04-26 | The Torrington Company | Method of forming a knitting needle latch pivot |
| US4219561A (en) * | 1977-09-22 | 1980-08-26 | Imperial Chemical Industries Limited | Alkanolamine derivatives |
| DE2944300C2 (de) * | 1979-11-02 | 1983-01-27 | Universal-Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co Kg, 7081 Westhausen | Doppelkopfnadel |
| DE3800802C1 (de) * | 1988-01-14 | 1989-02-16 | Theodor Groz & Soehne & Ernst Beckert Nadelfabrik Kg, 7470 Albstadt, De | |
| JPH0632146A (ja) * | 1992-07-14 | 1994-02-08 | Tsuchiya:Kk | 自動車のドアガラス支持装置におけるガラス接触部構造 |
| DE4402706C1 (de) * | 1994-01-29 | 1995-06-08 | Groz & Soehne Theodor | Zungennadel für Textilmaschinen |
-
2000
- 2000-07-22 DE DE10035826A patent/DE10035826C2/de not_active Expired - Lifetime
-
2001
- 2001-07-10 EP EP01953902A patent/EP1303658B1/de not_active Expired - Lifetime
- 2001-07-10 WO PCT/DE2001/002567 patent/WO2002008505A1/de not_active Ceased
- 2001-07-10 US US10/088,599 patent/US6564589B2/en not_active Expired - Lifetime
- 2001-07-10 JP JP2002513979A patent/JP3878129B2/ja not_active Expired - Lifetime
- 2001-07-10 DE DE50109388T patent/DE50109388D1/de not_active Expired - Lifetime
- 2001-07-10 AT AT01953902T patent/ATE321904T1/de not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0208505A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004504514A (ja) | 2004-02-12 |
| US6564589B2 (en) | 2003-05-20 |
| DE50109388D1 (de) | 2006-05-18 |
| ATE321904T1 (de) | 2006-04-15 |
| DE10035826A1 (de) | 2002-02-07 |
| EP1303658B1 (de) | 2006-03-29 |
| JP3878129B2 (ja) | 2007-02-07 |
| DE10035826C2 (de) | 2002-05-16 |
| WO2002008505A1 (de) | 2002-01-31 |
| US20020134115A1 (en) | 2002-09-26 |
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