EP1303659A1 - Zungennadel mit abgesetztem zungenschaft - Google Patents
Zungennadel mit abgesetztem zungenschaftInfo
- Publication number
- EP1303659A1 EP1303659A1 EP01953914A EP01953914A EP1303659A1 EP 1303659 A1 EP1303659 A1 EP 1303659A1 EP 01953914 A EP01953914 A EP 01953914A EP 01953914 A EP01953914 A EP 01953914A EP 1303659 A1 EP1303659 A1 EP 1303659A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tongue
- latch
- latch needle
- slot
- 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
Links
- 238000000926 separation method Methods 0.000 claims description 13
- 238000009940 knitting Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 3
- 210000002105 tongue Anatomy 0.000 description 124
- 238000000034 method Methods 0.000 description 7
- 238000004080 punching Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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 an end on it trained hook on.
- a tongue slot is formed near the hook, in which a tongue is pivotally mounted.
- the tongue can 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.
- the pivoting movement should be possible as smoothly as possible.
- Modern knitting machines often need needles with smooth tongues. 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.
- an increased tongue play worsens the guidance of the tongue when the needle is new.
- the tongue is less and less well guided, which in turn can impair operational reliability.
- the latch needle according to the invention has a tongue consisting of a tongue spoon and a tongue shaft, the side surface or side surfaces of which are divided.
- a first surface area surrounds the bearing opening and ensures a slight lateral tongue play here.
- the adjoining second surface area permits increased bearing play, ie an increased distance from the adjacent diaphragm wall, as a result of which wall contact is reduced or excluded to small surface areas. This makes it possible to manufacture latch needles, the tongues of which are very easy to move • ••. surrounds the bearing opening, be designed so that the tongue is guided with little play and thus precisely.
- the adjoining second surface area can be set back against this surface area, as a result of which the thickness of the tongue shank is reduced by a few hundredths of a millimeter (for example by 0.03 mm).
- This recessed surface area therefore makes little or no contribution to the lateral guidance of the tongue.
- the small tongue play in the area of the pin ensures good tongue guidance in the slot.
- the slight play of the tongue in the slot in the area of the guide surface of the first surface area significantly facilitates the process of pushing the pin, i.e. the pressing or punching process, in which parts of the cheek wall are pressed into the bearing opening of the tongue.
- the slight play prevents the cheek walls from being squeezed together when the pin is pressed and the needle is thus deformed. Particularly precise needles can thereby be produced.
- the increased play between the tongue shaft and the cheek wall reduces the risk that threads between the tongue and the cheek (slot side wall) are pinched, damaged or cut. It also reduces the risk of fibers or dirt entering the slot causing the tongue to jam.
- the guidance of the tongue is essentially carried out by the surface areas surrounding the tongue opening, it is possible to move between the other tongue flanks of the tongue. Shaft and the slot side walls have a significantly increased distance.
- the difference between the thickness of the tongue shaft in the area of the tongue hole and in the area of the tongue head or the tongue spoon can be several hundredths of a millimeter without the guidance of the tongue being impaired.
- the tongue is guided so precisely that the tongue hits the hook better. This increased precision in the operation of the needle can reduce the wear between the tongue and the hook.
- the tongue shaft does not rub along its entire length, which dips into the slot, but only in the area of its bearing on the slot wall.
- both side surfaces of the tongue shaft of the latch needle it is preferred to design both side surfaces of the tongue shaft of the latch needle so that both side surfaces are divided into separate surface areas.
- the tongue is then symmetrical to a central plane.
- a separation or transition region is formed between the two surface regions which are separated from one another and which can be in the form of a line or a strip.
- this separation area is designed, for example, as a line, edge or step or as a slightly curved transition area.
- the separation region is formed by a step, as a result of which a large distance is obtained between the side wall and the surface region along the surface region set back by the step.
- the surface area can be designed to be flat as well as curved or structured in one or more directions. The same applies to the other area, the surrounds the warehouse opening. This can also be formed by a flat surface or other shaped surface areas.
- FIG. 3 shows the latch needle according to FIGS. 1 and 2, in a partial and partially cut top view, on a different scale
- FIGS. 1 to 3 shows the tongue for the latch needle according to FIGS. 1 to 3, in a first embodiment and in a side view,
- FIG. 5 shows a modified embodiment of a tongue for the latch needle according to FIGS. 1 to 3, in a side view
- FIG. 6 the latch needle according to Figures 1 to 3, in plan view and with the tongue in the central closed position, and
- FIG. 7 the latch needle of Figure 6, with the tongue in the laterally deflected closed position, in a schematic plan 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 flat and arranged parallel to one another.
- the tongue 5 has a tongue shaft 11 which projects with one end 12 into the tongue slot 6.
- 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 shaft 11 merges into a tongue spoon 16 in an area 45, which has a recess 17 (tooth) on the hook side.
- a pin 18, which consists of two half pins 18a, 18b, is used for pivotably mounting the tongue 5 in the tongue slot 6. As illustrated in FIG. 3, these are formed by wall parts of the side walls 7, 8 which have been pressed out of them and into the tongue opening 14 in a pressing or punching process.
- the tongue 5 is formed in its first embodiment according to Figure 3. It has two side surfaces 21, 22 which extend over the two opposite flanks of the tongue shaft 11 from its end 12 to the point 45.
- the side surfaces 21, 22 are mirror-symmetrical to a dot-dash line in FIG. animal indicated median longitudinal plane 20 is formed. At least in the preferred embodiment, this also applies to the rest of the tongue 5 and latch needle 1.
- the following description of the side surface 21 thus applies accordingly to the side surface 22.
- the side surface 21, like the side surface 22, is divided into two surface regions 23, 24.
- the second surface area 23 extends from the tongue spoon 16 in the direction of the tongue opening 14 without reaching it.
- the surface area 23 can be designed as a flat surface. Alternatively, it can be arched at least in some areas, for example bent around a central axis of the tongue 5 or rounded at its edges and end areas 25, 26 (FIG. 4).
- the first surface area 24 can surround the tongue opening 14 and can thus have an annular shape.
- the surface area 24 can be designed as a flat surface.
- the surface area 24 can also be interrupted, for example by depressions or depressions or the like which extend radially away from the tongue opening 14.
- the surface areas 24 of both side surfaces 21, 22 are preferably oriented parallel to one another (FIG. 3)
- the lateral (axial) play of the tongue 5 is illustrated in FIG. 3 by a gap 28, 29.
- This gap 28, 29 is a few hundredths of a millimeter smaller than a comparatively larger gap 31, 32, which is defined between the side wall 7, 8 and the respective surface area 23. While the gaps 28, 29 are preferably parallel gaps, the gaps 31, 32 can be both parallel gaps and wedge-shaped gaps and widen in the direction of the tongue spoon 16. They then reach their greatest width in the area 45 at the end 15 of the tongue shaft 11 at the transition to the tongue spoon 16.
- a separating area 33 is formed between the area areas 23, 24, which here is approximately linear in side view. As illustrated in FIG. 3, it is formed by a step 34, 35, the edges 36, 37, 38, 39 of which may be somewhat rounded if necessary.
- the step 34, 35 is only a few thousandths to a few hundredths of a millimeter high, but is already visible to the naked eye.
- the step 35 can, as illustrated in FIG. 4, be curved around the tongue opening 14. If required, however, step 35 can also be arranged on a straight line, as shown in FIG. 2. As illustrated in FIG. 3, the step 35, 36 can be designed to be relatively steep. If necessary, however, it can also be formed by an embankment or ramp-like area, which creates a gradual transition between the surface areas 23, 24.
- FIG. 5 A modified embodiment of the tongue 5 is illustrated in FIG. 5. The difference is in that Separation area 33. While this was formed in the exemplary embodiments described above in each case as a step 35 and thus as a z-shaped step-shaped or S-shaped curved area in the exemplary embodiment, the separation area 33 in the embodiment according to FIG. 5 is formed by a simply curved (curved) edge area 41 formed. This separates and connects the surface areas 23, 24 and is visible as an edge on the side surface 21 and 22, respectively. If the edge region 41 is somewhat rounded, as indicated in FIG. 5, it may no longer be immediately visible to the naked eye. If it touches the surface areas 23, 24, it can be observed in the microscope or measured in some other way.
- the latch needle 1 described so far has an improved knitting behavior:
- the tongue 5 of the latch needle 1 is guided through its end 12 in the latch slot 6 and is mounted on the journal 18.
- the tongue shaft 11 is free in the tongue slot 6 and ideally does not touch the side walls 7, 8.
- the tongue 5 is guided so precisely at its end 12 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 represents a wear reserve, i.e. even if the lateral play of the tongue increases with increasing wear, it remains within permissible tolerances.
- the end 12 of the tongue 5 has a certain slight play in the tongue slot 6.
- the tongue 5, as illustrated by an arrow 42 in FIG. 7, can be slightly deflected laterally.
- the gap 31, 32 prevents the relevant side surface 21, 22 or the relevant surface area 23 on the side wall 7, 8 is in full contact. Ultimately, this is achieved in that the gap 31, 32 is larger than the respective gap 28, 29.
- the surface areas 23 come into contact with the side walls 7, 8 at most in some areas or in places. In the example of the deflection of the tongue 5 to one side (in FIG. 7 upward) illustrated in FIG. 7, the surface area 23 touches the side wall 8 only at a front location 43, while at a distance 44 a distance between the surface area occurs at a location 44 23 and the side wall 8 is preserved. It can also be achieved that the surface area 23 does not touch the side wall 7, 8.
- the improved latch needle 1 has a tongue 5, the side surfaces 21, 22 of the tongue shaft 11 are divided into surface areas 23, 24 which are offset from one another and / or are arranged at an angle to one another.
- the tongue 5, measured in the direction of its axis of rotation 27, has a thickness which is somewhat greater than in the shaft region (43), in particular at a point 45 of the transition from the tongue shaft 11 to the tongue spoon 16.
- the point 43 lies approximately at the mouth on the hook side of the tongue slot 6.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10035827 | 2000-07-22 | ||
| DE10035827A DE10035827C2 (de) | 2000-07-22 | 2000-07-22 | Zungennadel mit abgesetztem Zungenschaft |
| PCT/DE2001/002626 WO2002008506A1 (de) | 2000-07-22 | 2001-07-18 | Zungennadel mit abgesetztem zungenschaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1303659A1 true EP1303659A1 (de) | 2003-04-23 |
| EP1303659B1 EP1303659B1 (de) | 2006-05-24 |
Family
ID=7649920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01953914A Expired - Lifetime EP1303659B1 (de) | 2000-07-22 | 2001-07-18 | Zungennadel mit abgesetztem zungenschaft |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6574995B2 (de) |
| EP (1) | EP1303659B1 (de) |
| JP (1) | JP3889360B2 (de) |
| DE (2) | DE10035827C2 (de) |
| ES (1) | ES2260250T3 (de) |
| WO (1) | WO2002008506A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10341630B4 (de) * | 2003-09-10 | 2006-11-16 | Groz-Beckert Kg | Zungennadel |
| EP1584722B1 (de) * | 2004-04-06 | 2007-04-18 | Groz-Beckert KG | Zungennadel für maschenbildende Textilmaschine |
| EP1870502B1 (de) * | 2006-06-21 | 2009-07-29 | Groz-Beckert KG | Zungennadel für maschenbildende Textilmaschine |
| EP1873287B1 (de) * | 2006-06-26 | 2012-01-25 | Groz-Beckert Kommanditgesellschaft | Zungennadel für maschenbildende Textilmaschine |
| DE102006053919A1 (de) | 2006-10-11 | 2008-04-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zum Erzeugen einer Anzahl von Lautsprechersignalen für ein Lautsprecher-Array, das einen Wiedergaberaum definiert |
| DE102012202881B4 (de) | 2012-02-24 | 2026-03-19 | A.H. Meyer Maschinenfabrik Gmbh | Steppvorrichtung |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1039450A (en) * | 1909-03-18 | 1912-09-24 | Scott & Williams Inc | Latch-needle for knitting-machines. |
| 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 |
| DE3140386C2 (de) | 1981-10-10 | 1983-09-15 | Theodor Groz & Söhne & Ernst Beckert Nadelfabrik KG, 7470 Albstadt | "Zungennadel für Maschinen zur Herstellung von Maschenware" |
| DE3900162C1 (en) * | 1989-01-04 | 1990-03-08 | Shibata Needle Mfg. Co., Ltd., Nara, Jp | Latch needle for knitting machines |
| DE4402706C1 (de) * | 1994-01-29 | 1995-06-08 | Groz & Soehne Theodor | Zungennadel für Textilmaschinen |
-
2000
- 2000-07-22 DE DE10035827A patent/DE10035827C2/de not_active Expired - Lifetime
-
2001
- 2001-07-18 EP EP01953914A patent/EP1303659B1/de not_active Expired - Lifetime
- 2001-07-18 US US10/089,408 patent/US6574995B2/en not_active Expired - Lifetime
- 2001-07-18 ES ES01953914T patent/ES2260250T3/es not_active Expired - Lifetime
- 2001-07-18 WO PCT/DE2001/002626 patent/WO2002008506A1/de not_active Ceased
- 2001-07-18 JP JP2002513980A patent/JP3889360B2/ja not_active Expired - Lifetime
- 2001-07-18 DE DE50109890T patent/DE50109890D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0208506A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10035827A1 (de) | 2002-02-14 |
| DE10035827C2 (de) | 2003-10-16 |
| JP2004504515A (ja) | 2004-02-12 |
| WO2002008506A1 (de) | 2002-01-31 |
| ES2260250T3 (es) | 2006-11-01 |
| EP1303659B1 (de) | 2006-05-24 |
| DE50109890D1 (de) | 2006-06-29 |
| US6574995B2 (en) | 2003-06-10 |
| JP3889360B2 (ja) | 2007-03-07 |
| US20020152774A1 (en) | 2002-10-24 |
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