EP3690095A1 - Knitting machine needle and knitting system - Google Patents
Knitting machine needle and knitting system Download PDFInfo
- Publication number
- EP3690095A1 EP3690095A1 EP19154755.3A EP19154755A EP3690095A1 EP 3690095 A1 EP3690095 A1 EP 3690095A1 EP 19154755 A EP19154755 A EP 19154755A EP 3690095 A1 EP3690095 A1 EP 3690095A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- section
- knitting machine
- hook
- predetermined breaking
- 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
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- 238000009940 knitting Methods 0.000 title claims abstract description 206
- 230000009467 reduction Effects 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 7
- 210000005182 tip of the tongue Anatomy 0.000 claims description 6
- 230000007704 transition Effects 0.000 description 19
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
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
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- 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
- D04B35/06—Sliding-tongue needles
Definitions
- Knitting machine needles are known in many different designs. Knitting machine needles are inserted into a knitting machine and are often moved over one or more feet of the knitting machine needle in a channel of a needle bed of the knitting machine. For this purpose, the foot of the knitting machine needle interacts with a lock on the knitting machine. Especially with fast-running knitting machines, the knitting machine needle is subject to strong accelerations. Knitting machine needles with a tongue are often used ("latch needles"). The tongue performs numerous rapid swiveling movements which serve to form stitches together with a hook. The high dynamics of this swiveling movement can lead to errors in stitch formation in high-speed knitting machines. Such errors are promoted by inevitable wear on the hook and tongue.
- the hook and the tongue are arranged at a front end of the knitting machine needle and connected to the foot of the knitting machine needle via a shaft.
- throats for strain relief are in many designs of knitting machine needles below or in the immediate vicinity of Find tongue reserve position. These throats are not predetermined breaking points, since the throats are not intended to be broken with any appreciable probability by the force that the yarn exerts on the hook.
- the DE1635837A1 shows a needle, which is equipped with sections on the shaft, which are intended to prevent the transmission of shock waves from the foot to the hook.
- These sections can be designed as sections with changed mechanical properties or as sections with a reduction in the needle cross section.
- the special sections are carried out at points on the shaft at which the shaft has its greatest height. It is therefore not a question of predetermined breaking points, since the shaft is not likely to break at these points.
- the DE4320956A1 and the DE19503048C2 show predetermined breaking points on sewing or embroidery needles.
- the object is achieved by a knitting machine needle according to claim 1 and a knitting system according to claim 13.
- the knitting machine needle according to the invention comprises a hook for forming stitches, which delimits the shaft in the longitudinal direction of the shaft, or begins there, and which ends in a hook tip.
- a first drive section follows the hook.
- the force for moving the knitting machine needle is transmitted to the drive section of the knitting machine needle by a lock part of the knitting machine.
- the drive section can be designed as a foot which projects above the shaft in the positive height direction of the shaft.
- the drive section can be formed by a coupling point.
- a coupling element usually has a foot and the force for moving the knitting machine needle acts in a known manner on the coupling point of the knitting machine needle.
- the knitting machine needle according to the invention can further comprise a tongue.
- the tongue can be pivoted on the shaft in such a way that in its closed position it closes the interior of the hook and that the tip of the tongue in its reserve position in the longitudinal direction of the shaft at first Drive section has.
- the tongue can be rotatably mounted on the shaft on pins formed on the shaft, a hinge or an axis.
- the knitting machine needle according to the invention is characterized by a predetermined breaking section for separating the hook from the first drive section, which is formed by a section of the shaft which extends in the longitudinal direction thereof.
- a "section" has a more than infinitesimal extension in the longitudinal direction of the needle.
- the predetermined breaking section is located entirely in a first shaft section, which extends in the longitudinal direction of the shaft between the tip of the hook and the first drive section.
- a predetermined breaking section has a non-infinitesimal extension in the longitudinal direction of the knitting machine needle.
- the knitting machine needle breaks with a considerable probability at the predetermined breaking section due to the forces that can be transmitted through the yarn if the movement of the needle in the needle bed is impeded or the stitch fails to be knocked off.
- the shaft of the knitting machine needle extends over the entire longitudinal extent thereof.
- the shaft can only be divided into different functional sections.
- An end section of the shaft forms a hook and has a section adjacent to this hook which can come into contact with a yarn during the knitting process.
- the shaft further comprises a section (the drive section or foot) via which the movement of the knitting machine needle is initiated.
- Sections lying between the above-mentioned sections serve, for example, to guide the knitting machine needle (in a needle bed) and connect the above-mentioned functional sections.
- a predetermined breaking section will advantageously be located in a section of the shaft that serves the functions of guiding and connecting other functional sections.
- the shaft can have sections of different heights.
- the sections of the shaft of different heights can merge into one another at transition points.
- a first transition point can be arranged in the vicinity of the drive section.
- a second transition point can be arranged near the hook.
- the second transition point can be double or longitudinal be three times as far from the tip of the hook as the tip of the tongue in the back position of the tongue. The distance of the second transition point from the hook tip can also assume any values between the above values.
- the knitting machine needle can have a predetermined breaking section which is set up in such a way that the hook can be separated from the first drive section by a force which acts on the hook and is less than 80% of the force at which an identical needle without a predetermined breaking section is permanently deformed.
- the predetermined breaking section can in particular be set up in such a way that the hook can be separated from the first drive section if a corresponding force acts on the hook in the negative height direction. It is clear to the person skilled in the art that at least the diameter (“the fineness”) of the yarn is related to the breaking strength of the needle and that the breaking strength is certainly also determined by the fineness of the needle. The fineness also determines the maximum diameter of the yarn to be used.
- the tensile strength of the yarn is certainly also largely dependent on the yarn diameter, so that the overall fineness is a needle characteristic that has a great influence on the design of the predetermined breaking section.
- the fineness (or "squeeze") of the knitting machine needle can be determined by the thickness of the tape from which the knitting machine needle is punched and can be measured in the width direction of the knitting machine needle. With a needle with a pressure of 0.4 mm, the force at which the hook is separated from the first drive section, depending on the design of the predetermined breaking section, can be approximately from 5N to 1N, while an identical knitting machine needle would be permanently deformed at approximately 8N. "Deformation” stands here in particular as a generic term for "bending".
- a special test to verify the suitability of a predetermined breaking section could consist of placing the underside of the needle (the side facing away from the foot in its height direction) on a table, sliding the needle on the table with the hook first so far over the edge of the table until the hook-side (front) part of the needle protrudes beyond the edge of the table at least up to the predetermined breaking section. If a defined breaking or bending force is then applied to the hook, the breaking should take place at the predetermined breaking section. If there is a plastic deformation and no breakage as the force increases (for examples see above), the suitability of the needle for the purposes of this publication is to be doubted.
- the knitting machine needle can have a predetermined breaking section which is located entirely in a second shaft section, the second shaft section being located in Longitudinal direction of the shaft extends between the position of the tongue tip in the reserve position of the tongue and the first drive section.
- the knitting machine needle can have a predetermined breaking section which is located entirely in a third shaft section, which begins in the longitudinal direction of the knitting machine needle at the point which is spaced two tongue lengths away from the articulation point of the tongue in the direction of the first foot and which is in the longitudinal direction of the knitting machine needle ends at the point which is spaced three tongue lengths from the articulation point of the tongue in the direction of the first drive section, the tongue length being the distance between the articulation point of the tongue and the tongue tip.
- This articulation or bearing point of the tongue can have a bearing seat in the form of a circular opening in the tongue, into which an axis or a pin engages. The tongue length can be measured from the center of this opening.
- the tip of the tongue is the point of the tongue furthest away from this center and the distance between these two aforementioned points can represent the length of the tongue.
- the predetermined breaking section can be located in a fourth or fifth shaft section.
- a fourth shaft section can extend from the articulation point of the tongue to a second transition point.
- a fifth shaft section can extend from the position of the tongue tip in the reserve to a second transition point.
- the predetermined breaking section can be located in a sixth shaft section described below:
- slide needles have guide means for a slide (a hook closing element) at a distance in the longitudinal direction from the hook tip, which extend in the longitudinal direction on the drive section extend. These guide means do not extend below the tip of the hook. This results in a minimum distance in the longitudinal direction between the hook tip and the guide means.
- the sixth shaft section can extend from 1.5 times the minimum distance to three times the minimum distance from the tip of the hook.
- the knitting machine needle can have a distance of at least 75 mm from the hook-side end of the needle in the longitudinal direction of the shaft to the hook-side start of the first drive section or the first foot in the longitudinal direction.
- the knitting machine needle can have a shaft which has a height (“chest height”) of 0.8 to 1.5 mm in the region in which the tongue is articulated on the shaft, at the highest point in this region. This height is measured in the height direction.
- the knitting machine needle can have a shaft which in the section in which the predetermined breaking section is arranged has a height which is between 50% and 70% of the chest height.
- the knitting machine needle can have a shaft which is punched out of a strip material and which in the areas in which its thickness still corresponds to the thickness of the strip material has a thickness to be measured in the width direction of 0.3 to 0.6 mm or to 0.7 mm to have.
- the knitting machine needle can comprise a predetermined breaking section which has a reduction in the shaft cross section perpendicular to the longitudinal direction. "Vertical to the longitudinal direction" runs in particular the plane that is spanned by the height direction x and the width direction y of the needle.
- the knitting machine needle can have a predetermined breaking section, which has a reduction in the shaft cross-section, which is achieved by reducing the shaft in the height direction.
- a predetermined breaking section configured in this way can have the advantage that it can also be attached during a punching process and thus no separate manufacturing process is required.
- the predetermined breaking section can thus be produced inexpensively.
- the height of the shaft in the height direction can be reduced from above and / or from below. However, it would also be conceivable to make a recess (or more) in the shaft which does not pass through the top and bottom of the shaft or the predetermined breaking section.
- the knitting machine needle can have a predetermined breaking section, which has a reduction of at least 10% and a maximum of 60% of the height or the height dimensions of the adjacent shaft or the adjacent shaft sections at the point with a maximum reduced cross section. This leaves 40% to 90% of the cross-sectional area (in a plane transverse to the longitudinal direction of the needle) at the thinnest point of the predetermined breaking section. Especially if there are a plurality of notches that engage the shaft from different directions (e.g. from above and from below), the cross-section or height reduction in question can also be distributed over different subsections of the predetermined breaking section (20% from above, 25% from below).
- a notch-shaped configuration of the reduced-cross-section points of the predetermined breaking section enables a position which is relatively precisely defined in the longitudinal direction to be obtained for separating the hook from the drive section.
- the stresses are concentrated at the position of the predetermined breaking section.
- the width of the needle can of course also be reduced. This can be done in an equivalent way to the measures described above for reducing the height of the shaft dimensions.
- the knitting machine needle can have a reduction of the shaft in the height direction, which has a triangular shape with an opening angle of 60 ° to 120 °. An opening angle of 90 ° can be particularly advantageous.
- the three corners created in the shaft can be rounded.
- a radius of the rounding of at least 0.02 mm is advantageous; in the case of larger reductions in the height direction, the roundings can also advantageously be carried out with radii of 0.35 mm or, for example, 0.4 mm or 0.5 mm.
- the height reduction can also be trapezoidal, in the form of a step or in another form.
- throats which, for example, relieve the pressure on the stitches when sliding over the tongue in their back, become clear:
- Such throats have larger opening angles and a flat profile in order to allow easy entry and exit of the stitch .
- most predetermined breaking sections are intended to bring about a defined break at a defined point, so that the opening angles of the side flanks are smaller in such a predetermined breaking section.
- the specific shape, which is advantageous for a predetermined breaking section it is recommended to position such a predetermined breaking section at a point that is not suitable for a stitch relief throat: the stitch relief throat is located at a point over which the stitch slides.
- the predetermined breaking section could "catch" the stitch due to its shape and thus endanger the knitting process.
- the knitting machine needle can have a predetermined breaking section, the material of which has a lower elongation at break than sections of the remaining shaft.
- the behavior of the knitting machine needle in the event of an overload can be specifically controlled by this design of the predetermined breaking section (in addition or as an alternative to a height reduction or similar measures). Different deformations in the plastic area of the material are suppressed in favor of a targeted break if the load for which the knitting machine needle is designed is clearly exceeded.
- the knitting machine needle is advantageously made of steel. In steel, the elongation at break can be influenced by adjusting the hardness or the structure. In this way, the structure in the predetermined breaking section can be made specifically brittle and / or coarse-grained.
- needle beds is used in the present publication as a generic term for those parts of knitting systems that use needles in knitting. These are in particular knitting cylinders and dials of circular knitting machines and flat needle beds in flat knitting machines.
- the DE3311361A1 and the DE102014118217A1 describe measures to be able to further increase the performance of fast-running knitting machines and show examples of typical knitting systems with corresponding knitting machine needles in the figures.
- the present invention is particularly concerned with the improvement of knitting machine needles and knitting systems suitable for the high performance requirements outlined in these documents.
- the two publications describe knitting systems with knitting needles which have a very long, thin shaft section between the hook and the first foot. Large parts of this long and thin shaft section are guided laterally (in the width direction of the needle) not by webs of the needle bed, but by sinkers in the relevant needle beds according to the two aforementioned publications. Knitting systems of the aforementioned type realize great knitting performance with high fineness.
- the content of the two aforementioned documents is hereby at least in relation to the shape of the knitting needles used and Arrangement of knitting needles and sinkers in the relevant knitting systems included in this application.
- the knitting system according to the invention contains a needle bed with guide means and at least one channel base, which are set up to receive knitting machine needles and to guide and support them in their longitudinal direction during their intermittent movement.
- Needle beds in the form of cylinders, dials or flat needle beds can be used for flat knitting machines, for example.
- the knitting machine needles are received in channels by the needle bed and are guided by the channel webs in the width direction of the knitting machine needles and supported by the channel base in the negative height direction of the knitting machine needles.
- the guidance of the knitting machine needles in the width direction does not necessarily take place over the entire longitudinal extent of the knitting machine needle, but can also take place only in a rear section of the knitting machine needles.
- the knitting machine needle can, for example, also be guided in the width direction in other sections of its longitudinal extent by other knitting tools (this is the case, for example, with knitting systems according to the documents) DE3311361A1 and the DE102014118217A1 the case). The same applies to the support of the knitting machine needles on the channel base.
- the knitting system according to the invention also contains at least one lock part for transmitting force to at least a first drive section of a knitting machine needle accommodated in the needle bed.
- One foot of the knitting machine needle often protrudes from the channel of the needle bed and is received in a web-shaped depression (“lock curve”) in the lock part.
- a circular knitting machine has a plurality of lock parts, each of which defines a partial section of the distance that a needle foot (a coupling part) travels during a total rotation of the needle cylinder of a circular knitting machine. Due to this relative movement of the knitting machine needle to the lock parts in the width direction of the needle, the lock parts transmit the force to the relevant drive section or needle foot, which moves the needle during the knitting operation in a circular knitting machine in the longitudinal direction of the needle.
- the knitting system according to the invention is characterized in that at least one of the knitting machine needles has a predetermined breaking section for separating the hook from the first drive section.
- the predetermined breaking section is formed by a first section of the shaft, which extends in the longitudinal direction thereof.
- the predetermined breaking section is entirely in the first shaft section, which extends in the longitudinal direction of the shaft between the tip of the hook and the first drive section.
- the knitting system according to the invention can be designed such that the guide means and the at least one channel base of the needle bed, the at least one lock part and the position of the drive section and the predetermined breaking section on the at least one knitting machine needle are coordinated in such a way that the at least one knitting machine needle in knitting operation is at least temporarily so is driven far out of the guide means that the guide means at least partially no longer support the predetermined breaking section of the at least one knitting machine needle.
- the predetermined breaking section is at least in the driven-out state of the knitting machine needle above the first lock segment.
- the high forces can then possibly act via a relatively long lever from the hook to the predetermined breaking section. Since the predetermined breaking section lies approximately at a point at which support of the knitting machine needle driven out by the needle bed begins, there is a very high probability that a very defined break occurs on or in the predetermined breaking section. So here is It is important that the predetermined breaking section is not arranged too far forward in the direction of the hook, because otherwise an undefined breakage can result at the point at which the knitting machine needle is supported by the needle bed due to the leverage effect. If the predetermined breaking section lies completely in the supported area, an undefined break can result at the edge of the needle bed. For example, high forces can occur due to the withdrawal of goods if stitches are not knocked off and accumulate in the hook. Then a pulling force can quickly act on the hook that exceeds the commonly occurring pulling force, for example by a factor of 2 or more.
- Figure 1 shows a knitting machine needle 1 in an overall view.
- the illustration is not to scale and details which are not essential to the invention have been omitted.
- the other figures are also simplified accordingly.
- a coordinate system is shown which shows the directions defined on the knitting machine needle 1 shows.
- the longitudinal direction of the knitting machine needle 1 is denoted by z, the width direction by y and the height direction by x.
- the left end in the longitudinal direction z of the knitting machine needle 1 is the hook 2.
- the knitting machine needle 1 has a foot 5 (also referred to as drive section 33). The foot 5 projects beyond the knitting machine needle 1 in the positive height direction x.
- the knitting machine needle 1 extends even further to the right and has one or more additional feet.
- the shaft 3 of the knitting machine needle 1 extends between the hook 2 and the foot 5.
- the shaft 3 clearly has a long and slender shape.
- the length from the hook-side start 20 of the knitting machine needle 1 to the hook-side start 19 of the first foot 5 is approximately 78 mm in the present exemplary embodiment.
- three sections (10, 11, 13) of the longitudinal extension of the shaft 3 of the knitting machine needle 1 are shown with curved brackets.
- the first 10 and the second section 11 extend at their right end to the hook-side beginning of the first foot 5.
- On the shaft 3 there is a predetermined breaking section 9 in the third section 13, which is also included in the first section 10 and the second section 11 appropriate.
- the hook tip (4) and the hook-side end 20 of the knitting machine needle 1 can be seen in particular.
- the tongue 6, which is shown in its reserve position 8, is also involved in the stitch formation. In this position, the tip of the tongue 12 reaches a point at which it is directed in the longitudinal direction z at most to the foot 5 (also referred to as drive section 33).
- the tongue 6 is rotatably attached to the pivot point 14 on the shaft 3.
- the shaft 3 has a predetermined breaking section 9 which has a notch or recess in which the height of the shaft or the shaft dimensions in the height direction x is reduced from above.
- the recess in question has a triangular shape with a rounded tip. In the rounded tip, the triangle has an angle ("opening angle") of 90 °.
- the height of the shaft 3 is reduced by approximately 50% at the location of the smallest remaining cross section.
- the Figure 3 corresponds essentially to that Figure 2 , only an alternative embodiment of a predetermined breaking section 9 is shown.
- the size of the reduction in the cross section is less than in the embodiment of FIG Figure 2 .
- the tip of the resulting recess can be rounded.
- the corners that arise on the upper edge of the shaft 3 on the left and right on the predetermined breaking section 9 can also be rounded in all the exemplary embodiments.
- the Figure 4 shows a further embodiment of a knitting machine needle 1 in an overall view.
- the knitting machine needle 1 largely corresponds to the knitting machine needle 1 Figure 1 , only an alternative embodiment of a predetermined breaking section 9 is shown.
- a first transition point 28 and a second transition point as well as the fourth section 30 of the shaft 3 and the fifth section 31 of the shaft 3 are indicated with curly brackets.
- the shaft 3 has a maximum height (dimension in the height direction x) up to the first transition point 28.
- the height of the shaft 3 is quickly reduced to an average height.
- the second transition point 29 in the direction of the hook 2 the height of the shaft 3 is reduced again.
- the fourth section 30 of the shaft 3 extends in the longitudinal direction z of the knitting machine needle 1 from the articulation point 14 of the tongue 6 to the second transition point 29.
- the fifth section 31 of the shaft 3 extends in the longitudinal direction z of the knitting machine needle 1 from the tip 12 of the Tongue 6 in the reserve position 8 up to the second transition point 29. In both areas, a minimum height of the shaft 3 and thus a suitable position for a predetermined breaking section 9 can be determined.
- the shaft section between the second transition point 29 and the first drive section 33 has a greater height of the shaft and therefore does not offer an optimal position for a predetermined breaking section 9.
- the predetermined breaking section 9 is in the enlarged view in the Figure 5 easier to see.
- the knitting machine needle 1 of Figure 5 differs essentially only in the design of the predetermined breaking section 9 from the knitting machine needle 1 from FIG Figures 2 and 3 .
- the predetermined breaking section 9 is formed by reducing the height of the shaft 3 in the height direction x from below. Otherwise this reduction "from below” is identical to that in Figure 2 shown reduction "from above”.
- reductions in the shaft cross section from above, from below or from both sides can advantageously be carried out.
- reductions in the width direction y can also be used.
- the side flanks 25, the shape 26 of the height reduction, the dimensions of the shaft height in the zx plane and the opening angle 27 of the height reduction are illustrated.
- Figure 6 shows an enlarged view of the front region of a knitting machine needle 1, which, except for the embodiment of the predetermined breaking section 9, essentially corresponds to that in FIGS Figures 1 to 5 shown knitting machine needles 1 corresponds.
- the predetermined breaking section 9 is formed by a section of the shaft 3, the cross section of which is not adapted to form a predetermined breaking section 9. Rather, the hatching of the shaft 3 in the predetermined breaking section 9 symbolizes that the material of the predetermined breaking section 9 has adapted properties and in particular a lower elongation at break than neighboring regions 23, 24 of the shaft 3.
- Such an adaptation of the material properties in the predetermined breaking section 9 can be used advantageously for all exemplary embodiments of the invention alternatively or in combination with other measures such as, for example, cross-sectional reductions.
- Figure 7 corresponds essentially to that Figure 2 .
- the tongue 6 is shown for clarity in its two extreme positions.
- the tongue is shown both in its closed position 7 and in its reserve position 8.
- the adjacent areas of the predetermined breaking section 23, 24 are also illustrated.
- Figure 8 shows a section through a channel of the needle bed 16 of a knitting system 15 according to the invention.
- the cutting line lies in the width direction y immediately in front of the side wall of the needle 1 (and parallel to it).
- the knitting system 15 is similar to that in the publications DE3311361A1 and DE102014118217A1 knitting systems shown, the representation is not to scale and essential for the knitting process Components - such as other knitting tools (especially blanks here) - have been omitted.
- the sinkers not shown, guide the knitting needle 1 in its width direction y in the regions which come in front of the channel walls 17 in the longitudinal direction z of the needles 1.
- the circuit board adjacent to the needle 1 would therefore normally be partially visible behind the needle 1.
- the knitting machine needle 1 is guided in two dimensions by guide means 17 of the needle bed 16. In the height direction x, the knitting machine needle 1 is supported by the channel base 32 of the needle bed 16. The knitting machine needle 1 is guided by two channel walls 17 in the width direction y. In the representation of the Figure 8 only one channel wall 17 of the needle bed 16 is shown, which guides the knitting machine needle 1 in its rear region, in which the foot 5 is also located, in the width direction y (the boards which take over this in the front region are omitted as mentioned). The foot 5 of the knitting machine needle 1 engages in the lock part 18 shown in section.
- the knitting machine needle 1 In the front region of the needle 1, in particular from the hook 2 to the predetermined breaking section 9, the knitting machine needle 1 is not supported by the needle bed 16 in the height direction x in its position shown in the needle bed 16.
- the situation shown arises in the case of knitting systems 15 according to the invention at least when the knitting machine needle 1 is driven to the maximum in the knitting mode.
- a predetermined breaking In a driven position of the needle 1, in which the needle bed 16 or other knitting machine parts no longer ensure a supporting function for the predetermined breaking section 9 or at least large parts of the hook-side part of the needle in front of it, a predetermined breaking is particularly probable. This is all the more true since, in the load position shown by a force F, a predetermined breaking by "kinking" the front part of the needle 1 with the hook 2 is very likely.
Abstract
Die Erfindung betrifft eine Strickmaschinennadel (1), die zumindest die folgenden Merkmale umfasst:• Einen Haken (2) zur Bildung von Maschen, der den Schaft (3) in der Längsrichtung (z) des Schaftes (3) begrenzt und der in einer Hakenspitze (4) ausläuft und• Einen in der Längsrichtung (z) des Schaftes (3) auf den Haken (2) folgenden ersten Antriebsabschnitt (33).Die Strickmaschinennadel (1) ist gekennzeichnet durch einen Sollbruchabschnitt (9) zur Trennung des Hakens (2) von dem ersten Antriebsabschnitt (33). Der Sollbruchabschnitt (9) wird durch einen Abschnitt des Schaftes (3), der sich in Längsrichtung (z) erstreckt, gebildet. Der Sollbruchabschnitt (9) befindet sich gänzlich in einem ersten Schaftabschnitt (10), der sich in der Längsrichtung (z) des Schaftes (3) zwischen der Spitze (4) des Hakens (2) und dem ersten Antriebsabschnitt (33) erstreckt. Ferner wird ein Stricksystem (15) beansprucht, das zumindest eine Strickmaschinennadel (1) mit einem Sollbruchabschnitt (9) aufweist.The invention relates to a knitting machine needle (1) which comprises at least the following features: A hook (2) for forming stitches which delimits the shaft (3) in the longitudinal direction (z) of the shaft (3) and which is in a hook point (4) runs out and • A first drive section (33) following the hook (2) in the longitudinal direction (z) of the shaft (3). The knitting machine needle (1) is characterized by a predetermined breaking section (9) for separating the hook (2) ) from the first drive section (33). The predetermined breaking section (9) is formed by a section of the shaft (3) which extends in the longitudinal direction (z). The predetermined breaking section (9) is located entirely in a first shaft section (10) which extends in the longitudinal direction (z) of the shaft (3) between the tip (4) of the hook (2) and the first drive section (33). A knitting system (15) is also claimed which has at least one knitting machine needle (1) with a predetermined breaking section (9).
Description
Die vorliegende Erfindung betrifft eine Strickmaschinennadel und ein Stricksystem. Strickmaschinennadeln sind in vielen verschiedenen Ausführungen bekannt. Strickmaschinennadeln werden in eine Strickmaschine eingesetzt und oft über einen oder mehrere Füße der Strickmaschinennadel in einem Kanal eines Nadelbetts der Strickmaschine bewegt. Der Fuß der Strickmaschinennadel wirkt hierzu mit einem Schloss an der Strickmaschine zusammen. Vor allem bei schnell laufenden Strickmaschinen ist die Strickmaschinennadel hierbei starken Beschleunigungen unterworfen. Häufig kommen Strickmaschinennadeln, die eine Zunge aufweisen, zum Einsatz ("Zungennadeln"). Die Zunge führt zahlreiche schnelle Schwenkbewegungen aus, die dazu dienen, zusammen mit einem Haken Maschen zu bilden. Durch die hohe Dynamik dieser Schwenkbewegung kann es bei schnell laufenden Strickmaschinen zu Fehlern bei der Maschenbildung kommen. Solche Fehler werden durch unvermeidlich auftretenden Verschleiß an dem Haken und der Zunge begünstigt. Der Haken und die Zunge sind an einem vorderen Ende der Strickmaschinennadel angeordnet und über einen Schaft mit dem Fuß der Strickmaschinennadel verbunden.The present invention relates to a knitting machine needle and a knitting system. Knitting machine needles are known in many different designs. Knitting machine needles are inserted into a knitting machine and are often moved over one or more feet of the knitting machine needle in a channel of a needle bed of the knitting machine. For this purpose, the foot of the knitting machine needle interacts with a lock on the knitting machine. Especially with fast-running knitting machines, the knitting machine needle is subject to strong accelerations. Knitting machine needles with a tongue are often used ("latch needles"). The tongue performs numerous rapid swiveling movements which serve to form stitches together with a hook. The high dynamics of this swiveling movement can lead to errors in stitch formation in high-speed knitting machines. Such errors are promoted by inevitable wear on the hook and tongue. The hook and the tongue are arranged at a front end of the knitting machine needle and connected to the foot of the knitting machine needle via a shaft.
Bei einigen Strickmaschinentypen treten Kollisionen zwischen dem Fuß der Stricknadel und den Schlössern bzw. den Auswahlteilen auf. Um der Entstehung von Schäden entgegenzuwirken oder diese zumindest abzuschwächen, schlagen die
Die
Die
In jüngerer Zeit sind insbesondere bei langen schlanken Strickmaschinennadeln Schäden durch Kollisionen den Füssen benachbarter Bereichen des Schaftes mit den Schlössern aufgetreten.More recently, especially with long, slim knitting machine needles, damage has occurred due to collisions between the feet of adjacent areas of the shaft with the locks.
Es ist die Aufgabe der vorliegenden Erfindung diesem Problem abzuhelfen.It is the object of the present invention to remedy this problem.
Gelöst wird die Aufgabe durch eine Strickmaschinennadel gemäß Anspruch 1 und ein Stricksystem gemäß Anspruch 13.The object is achieved by a knitting machine needle according to
Die erfindungsgemäße Strickmaschinennadel umfasst einen Haken zur Bildung von Maschen, der den Schaft in der Längsrichtung des Schaftes begrenzt, bzw. dort beginnt, und der in einer Hakenspitze ausläuft. In der Längsrichtung des Schaftes folgt auf den Haken ein erster Antriebsabschnitt. Auf den Antriebsabschnitt der Strickmaschinennadel wird von einem Schlossteil der Strickmaschine die Kraft zur Bewegung der Strickmaschinennadel übertragen. Der Antriebsabschnitt kann als Fuß, der den Schaft in der positiven Höhenrichtung des Schaftes überragt, ausgebildet sein. Der Antriebsabschnitt kann durch eine Kupplungsstelle gebildet sein. In diesem Fall weist ein Kupplungselement in der Regel einen Fuß auf und die Kraft zur Bewegung der Strickmaschinennadel wirkt in bekannter Weise auf die Kupplungsstelle der Strickmaschinennadel. Die erfindungsgemäße Strickmaschinennadel kann weiterhin eine Zunge umfassen. Die Zunge kann an dem Schaft derart drehbar angelenkt sein, dass sie in ihrer Schließposition den Innenraum des Hakens verschließt und dass die Spitze der Zunge in ihrer Rücklagenposition in der Längsrichtung des Schaftes auf den ersten Antriebsabschnitt weist. Die Zunge kann am Schaft auf am Schaft ausgebildeten Zapfen, einem Scharnier oder einer Achse drehbar gelagert sein.The knitting machine needle according to the invention comprises a hook for forming stitches, which delimits the shaft in the longitudinal direction of the shaft, or begins there, and which ends in a hook tip. In the longitudinal direction of the shaft, a first drive section follows the hook. The force for moving the knitting machine needle is transmitted to the drive section of the knitting machine needle by a lock part of the knitting machine. The drive section can be designed as a foot which projects above the shaft in the positive height direction of the shaft. The drive section can be formed by a coupling point. In this case, a coupling element usually has a foot and the force for moving the knitting machine needle acts in a known manner on the coupling point of the knitting machine needle. The knitting machine needle according to the invention can further comprise a tongue. The tongue can be pivoted on the shaft in such a way that in its closed position it closes the interior of the hook and that the tip of the tongue in its reserve position in the longitudinal direction of the shaft at first Drive section has. The tongue can be rotatably mounted on the shaft on pins formed on the shaft, a hinge or an axis.
Die erfindungsgemäße Strickmaschinennadel ist gekennzeichnet durch einen Sollbruchabschnitt zur Trennung des Hakens von dem ersten Antriebsabschnitt, der durch einen Abschnitt des Schaftes, der sich in dessen Längsrichtung erstreckt, gebildet wird. Ein "Abschnitt" hat in der Sprache der vorliegenden Druckschrift eine mehr als infinitesimale Ausdehnung in Längsrichtung der Nadel. Der Sollbruchabschnitt befindet sich gänzlich in einem ersten Schaftabschnitt, der sich in der Längsrichtung des Schaftes zwischen der Spitze des Hakens und dem ersten Antriebsabschnitt erstreckt.The knitting machine needle according to the invention is characterized by a predetermined breaking section for separating the hook from the first drive section, which is formed by a section of the shaft which extends in the longitudinal direction thereof. In the language of the present publication, a "section" has a more than infinitesimal extension in the longitudinal direction of the needle. The predetermined breaking section is located entirely in a first shaft section, which extends in the longitudinal direction of the shaft between the tip of the hook and the first drive section.
Überraschenderweise hat sich gezeigt, dass dem Problem der Schäden an Nadelbetten und Schlössern durch einen solchen Sollbruchabschnitt, der seine Wirkung in Bezug auf den Schaft der Strickmaschinennadel entfaltet und zu einem Bruch desselben zwischen dem Haken und dem ersten Antriebsabschnitt führt, in erheblichem Maße entgegengewirkt wird.Surprisingly, it has been shown that the problem of damage to needle beds and locks is considerably counteracted by such a predetermined breaking section, which develops its effect with respect to the shaft of the knitting machine needle and leads to a break between the hook and the first drive section.
Ein Sollbruchabschnitt hat eine nicht infinitesimale Ausdehnung in der Längsrichtung der Strickmaschinennadel. Die Strickmaschinennadel bricht mit einer erheblichen Wahrscheinlichkeit am Sollbruchabschnitt aufgrund der durch das Garn übertragbaren Kräfte, wenn die Bewegung der Nadel im Nadelbett behindert ist oder das Abschlagen der Masche scheitert. Im Sinne der vorliegenden Druckschrift erstreckt sich der Schaft der Strickmaschinennadel über die gesamte Längserstreckung derselben. Der Schaft ist lediglich in unterschiedliche Funktionsabschnitte unterteilbar. Ein Endabschnitt des Schaftes bildet einen Haken und weist angrenzend an diesen Haken einen Abschnitt auf, der im Strickvorgang mit einem Garn in Kontakt treten kann. Weiterhin umfasst der Schaft einen Abschnitt (den Antriebsabschnitt oder Fuß), über den die Bewegung der Strickmaschinennadel eingeleitet wird. Zwischen den oben genannten Abschnitten liegende Abschnitte dienen zum Beispiel der Führung der Strickmaschinennadel (in einem Nadelbett) und verbinden die oben genannten Funktionsabschnitte. Ein Sollbruchabschnitt wird sich vorteilhafterweise in einem Abschnitt des Schaftes befinden, der die Funktionen der Führung und der Verbindung anderer Funktionsabschnitte dient. Der Schaft kann Abschnitte mit unterschiedlicher Höhe aufweisen. Die Abschnitte des Schaftes unterschiedlicher Höhe können an Übergangspunkten in einander übergehen. Ein erster Übergangspunkt kann in der Nähe des Antriebsabschnitts angeordnet sein. Ein zweiter Übergangspunkt kann nahe des Hakens angeordnet sein. Der zweite Übergangspunkt kann in Längsrichtung doppelt oder dreimal so weit von der Hakenspitze beabstandet sein wie die die Zungenspitze in der Rücklagenposition der Zunge. Der Abstand des zweiten Übergangspunkts von der Hakenspitze kann auch beliebige Werte zwischen den o.g. Werten annehmen.A predetermined breaking section has a non-infinitesimal extension in the longitudinal direction of the knitting machine needle. The knitting machine needle breaks with a considerable probability at the predetermined breaking section due to the forces that can be transmitted through the yarn if the movement of the needle in the needle bed is impeded or the stitch fails to be knocked off. In the sense of the present publication, the shaft of the knitting machine needle extends over the entire longitudinal extent thereof. The shaft can only be divided into different functional sections. An end section of the shaft forms a hook and has a section adjacent to this hook which can come into contact with a yarn during the knitting process. The shaft further comprises a section (the drive section or foot) via which the movement of the knitting machine needle is initiated. Sections lying between the above-mentioned sections serve, for example, to guide the knitting machine needle (in a needle bed) and connect the above-mentioned functional sections. A predetermined breaking section will advantageously be located in a section of the shaft that serves the functions of guiding and connecting other functional sections. The shaft can have sections of different heights. The sections of the shaft of different heights can merge into one another at transition points. A first transition point can be arranged in the vicinity of the drive section. A second transition point can be arranged near the hook. The second transition point can be double or longitudinal be three times as far from the tip of the hook as the tip of the tongue in the back position of the tongue. The distance of the second transition point from the hook tip can also assume any values between the above values.
Die Strickmaschinennadel kann einen Sollbruchabschnitt aufweisen, der derart eingerichtet ist, dass der Haken von dem ersten Antriebsabschnitt trennbar ist durch eine Kraft, die am Haken wirkt und kleiner als 80% der Kraft ist, bei der eine baugleiche Nadel ohne Sollbruchabschnitt dauerhaft verformt wird. Der Sollbruchabschnitt kann insbesondere derart eingerichtet sein, dass der Haken von dem ersten Antriebsabschnitt trennbar ist, wenn eine entsprechende Kraft in negativer Höhenrichtung am Haken angreift. Dem Fachmann ist hierbei klar, dass zumindest der Durchmesser ("die Feinheit") des Garnes in einem Verhältnis zur Bruchfestigkeit der Nadel steht und dass die Bruchfestigkeit sicherlich auch von der Feinheit der Nadel mitbestimmt wird. Die Feinheit bestimmt auch den Höchstdurchmesser des zu verwendenden Garns. Die Zugfestigkeit des Garns ist sicherlich auch maßgeblich von dem Garndurchmesser abhängig, so dass die Feinheit insgesamt eine Nadeleigenschaft ist, die großen Einfluss auf die Gestaltung des Sollbruchabschnitts hat. Die Feinheit (oder "Pressung") der Strickmaschinennadel kann durch die Dicke des Bandes, aus dem die Strickmaschinennadel gestanzt ist, bestimmt sein und kann in der Breitenrichtung der Strickmaschinennadel gemessen werden. Bei einer Nadel mit Pressung 0,4mm kann die Kraft, bei der der Haken von dem ersten Antriebsabschnitt getrennt wird, je nach Ausführung des Sollbruchabschnitts ungefähr von 5N bis 1N betragen, während eine baugleiche Strickmaschinennadel bei ungefähr 8N dauerhaft verformt würde. "Verformen" steht hier insbesondere als Oberbegriff zu "Verbiegen". Ein spezieller Test zur Verifikation der Eignung eines Sollbruchabschnitts könnte darin bestehen, die Nadel mit ihrer Unterseite (dem Fuß abgewandte Seite in ihrer Höhenrichtung) auf einen Tisch zu legen, die Nadel auf dem Tisch mit dem Haken voran soweit über die Tischkante zu schieben, bis der hakenseitige (Vorder-)Teil der Nadel mindestens bis zu dem Sollbruchabschnitt über die Tischkante hinausragt. Wird dann der Haken mit einer definierten Bruch- oder Knickkraft beaufschlagt, sollte an dem Sollbruchabschnitt der Bruch stattfinden. Falls bei weiterer Steigerung der Kraft (Beispiele siehe oben) eine plastische Verformung und kein Bruch stattfindet, ist die Eignung der Nadel für die Zwecke dieser Druckschrift zu bezweifeln.The knitting machine needle can have a predetermined breaking section which is set up in such a way that the hook can be separated from the first drive section by a force which acts on the hook and is less than 80% of the force at which an identical needle without a predetermined breaking section is permanently deformed. The predetermined breaking section can in particular be set up in such a way that the hook can be separated from the first drive section if a corresponding force acts on the hook in the negative height direction. It is clear to the person skilled in the art that at least the diameter (“the fineness”) of the yarn is related to the breaking strength of the needle and that the breaking strength is certainly also determined by the fineness of the needle. The fineness also determines the maximum diameter of the yarn to be used. The tensile strength of the yarn is certainly also largely dependent on the yarn diameter, so that the overall fineness is a needle characteristic that has a great influence on the design of the predetermined breaking section. The fineness (or "squeeze") of the knitting machine needle can be determined by the thickness of the tape from which the knitting machine needle is punched and can be measured in the width direction of the knitting machine needle. With a needle with a pressure of 0.4 mm, the force at which the hook is separated from the first drive section, depending on the design of the predetermined breaking section, can be approximately from 5N to 1N, while an identical knitting machine needle would be permanently deformed at approximately 8N. "Deformation" stands here in particular as a generic term for "bending". A special test to verify the suitability of a predetermined breaking section could consist of placing the underside of the needle (the side facing away from the foot in its height direction) on a table, sliding the needle on the table with the hook first so far over the edge of the table until the hook-side (front) part of the needle protrudes beyond the edge of the table at least up to the predetermined breaking section. If a defined breaking or bending force is then applied to the hook, the breaking should take place at the predetermined breaking section. If there is a plastic deformation and no breakage as the force increases (for examples see above), the suitability of the needle for the purposes of this publication is to be doubted.
Die Strickmaschinennadel kann einen Sollbruchabschnitt aufweisen, der sich gänzlich in einem zweiten Schaftabschnitt befindet, wobei sich der zweite Schaftabschnitt in Längsrichtung des Schaftes zwischen der Position der Zungenspitze in der Rücklagenposition der Zunge und dem ersten Antriebsabschnitt erstreckt.The knitting machine needle can have a predetermined breaking section which is located entirely in a second shaft section, the second shaft section being located in Longitudinal direction of the shaft extends between the position of the tongue tip in the reserve position of the tongue and the first drive section.
Die Strickmaschinennadel kann einen Sollbruchabschnitt aufweisen, der sich gänzlich in einem dritten Schaftabschnitt befindet, der in der Längsrichtung der Strickmaschinennadel an der Stelle beginnt, die in Richtung auf den ersten Fuß zwei Zungenlängen von der Anlenkstelle der Zunge beabstandet ist und der in der Längsrichtung der Strickmaschinennadel an der Stelle endet, die in Richtung auf den ersten Antriebsabschnitt drei Zungenlängen von der Anlenkstelle der Zunge beabstandet ist, wobei die Zungenlänge der Abstand zwischen der Anlenkstelle der Zunge und der Zungenspitze ist. Diese Anlenk- oder Lagerstelle der Zunge kann in der Zunge einen Lagersitz in Form eines kreisförmigen Durchbruchs aufweisen, in den eine Achse oder ein Zapfen hineingreift. Die Zungenlänge kann vom Mittelpunkt dieses Durchbruchs ausgehend gemessen werden. Die Zungenspitze ist der von diesem Mittelpunkt am weitesten entfernt liegende Punkt der Zunge und der Abstand dieser beiden vorgenannten Punkte kann die Zungenlänge darstellen. Durch die spezifische Festlegung der Position des Sollbruchabschnitts in der Längsrichtung der Strickmaschinennadel kann die Streuung zwischen einzelnen Exemplaren einer Vielzahl von Strickmaschinennadel bezüglich des Kraftwertes, bei dem die Trennung des Hakens vom Antriebsabschnitt erfolgt, verringert werden. Der Sollbruchabschnitt kann sich in einem vierten oder fünften Schaftabschnitt befinden. Ein vierter Schaftabschnitt kann sich von der Anlenkstelle der Zunge bis zu einem zweiten Übergangspunkt erstrecken. Ein fünfter Schaftabschnitt kann sich von der Position der Zungenspitze in der Rücklage bis zu einem zweiten Übergangspunkt erstrecken. Bei Strickmaschinennadeln ohne Zunge (wie zum Beispiel Schiebernadeln) kann sich der Sollbruchabschnitt in einem nachfolgend beschriebenen sechsten Schaftabschnitt befinden: Schiebernadeln weisen in einem Abstand in der Längsrichtung von der Hakenspitze Führungsmittel für einen Schieber (ein Hakenschließelement) auf, die sich in Längsrichtung auf den Antriebsabschnitt erstrecken. Diese Führungsmittel erstrecken sich nicht bis unter die Hakenspitze. Dadurch ergibt sich in Längsrichtung ein Minimalabstand zwischen der Hakenspitze und den Führungsmitteln. Der sechste Schaftabschnitt kann sich vom 1,5-fachen des Minimalabstandes bis zum dreifachen des Minimalabstandes von der Hakenspitze erstrecken.The knitting machine needle can have a predetermined breaking section which is located entirely in a third shaft section, which begins in the longitudinal direction of the knitting machine needle at the point which is spaced two tongue lengths away from the articulation point of the tongue in the direction of the first foot and which is in the longitudinal direction of the knitting machine needle ends at the point which is spaced three tongue lengths from the articulation point of the tongue in the direction of the first drive section, the tongue length being the distance between the articulation point of the tongue and the tongue tip. This articulation or bearing point of the tongue can have a bearing seat in the form of a circular opening in the tongue, into which an axis or a pin engages. The tongue length can be measured from the center of this opening. The tip of the tongue is the point of the tongue furthest away from this center and the distance between these two aforementioned points can represent the length of the tongue. By specifically determining the position of the predetermined breaking section in the longitudinal direction of the knitting machine needle, the scatter between individual examples of a plurality of knitting machine needles can be reduced with respect to the force value at which the hook is separated from the drive section. The predetermined breaking section can be located in a fourth or fifth shaft section. A fourth shaft section can extend from the articulation point of the tongue to a second transition point. A fifth shaft section can extend from the position of the tongue tip in the reserve to a second transition point. In the case of knitting machine needles without a tongue (such as slide needles), the predetermined breaking section can be located in a sixth shaft section described below: slide needles have guide means for a slide (a hook closing element) at a distance in the longitudinal direction from the hook tip, which extend in the longitudinal direction on the drive section extend. These guide means do not extend below the tip of the hook. This results in a minimum distance in the longitudinal direction between the hook tip and the guide means. The sixth shaft section can extend from 1.5 times the minimum distance to three times the minimum distance from the tip of the hook.
Die Strickmaschinennadel kann einen Abstand von mindestens 75mm von dem hakenseitigen Ende der Nadel in Längsrichtung des Schaftes bis zum hakenseitigen Beginn des ersten Antriebsabschnitts bzw. des ersten Fußes in Längsrichtung aufweisen.The knitting machine needle can have a distance of at least 75 mm from the hook-side end of the needle in the longitudinal direction of the shaft to the hook-side start of the first drive section or the first foot in the longitudinal direction.
Die Strickmaschinennadel kann einen Schaft aufweisen, der in dem Bereich, in dem die Zunge am Schaft angelenkt ist, an der höchsten Stelle in diesem Bereich, eine Höhe ("Brusthöhe") von 0,8 bis 1,5 mm hat. Diese Höhe wird in der Höhenrichtung gemessen. Die Strickmaschinennadel kann einen Schaft aufweisen, der in dem Abschnitt, in dem der Sollbruchabschnitt angeordnet ist, eine Höhe haben, die zwischen 50% und 70% der Brusthöhe beträgt.The knitting machine needle can have a shaft which has a height (“chest height”) of 0.8 to 1.5 mm in the region in which the tongue is articulated on the shaft, at the highest point in this region. This height is measured in the height direction. The knitting machine needle can have a shaft which in the section in which the predetermined breaking section is arranged has a height which is between 50% and 70% of the chest height.
Die Strickmaschinennadel kann einen Schaft aufweisen, der aus einem Bandmaterial ausgestanzt ist und der in den Bereichen, in denen seine Dicke noch der Dicke des Bandmaterials entspricht, eine in der Breitenrichtung zu messende Dicke von 0,3 bis 0,6mm oder bis 0,7mm haben.The knitting machine needle can have a shaft which is punched out of a strip material and which in the areas in which its thickness still corresponds to the thickness of the strip material has a thickness to be measured in the width direction of 0.3 to 0.6 mm or to 0.7 mm to have.
Die Strickmaschinennadel kann einen Sollbruchabschnitt umfassen, der eine Reduktion des Schaftquerschnitts senkrecht zur Längsrichtung aufweist. "Senkrecht zur Längsrichtung" verläuft insbesondere die Ebene, die von der Höhenrichtung x und der Breitenrichtung y der Nadel aufgespannt wird.The knitting machine needle can comprise a predetermined breaking section which has a reduction in the shaft cross section perpendicular to the longitudinal direction. "Vertical to the longitudinal direction" runs in particular the plane that is spanned by the height direction x and the width direction y of the needle.
Die Strickmaschinennadel kann einen Sollbruchabschnitt aufweisen, der eine Reduktion des Schaftquerschnitts aufweist, die durch eine Reduktion des Schaftes in Höhenrichtung erfolgt. Ein dermaßen ausgestalteter Sollbruchabschnitt kann den Vorteil aufweisen, dass er bei einem Stanzvorgang mit angebracht werden kann und so kein separater Herstellungsvorgang benötigt wird. Damit kann der Sollbruchabschnitt kostengünstig hergestellt werden. Die Reduktion der Höhe des Schaftes in Höhenrichtung kann hierbei von oben und/oder von unten erfolgen. Denkbar wäre jedoch auch eine Aussparung (oder mehrere) im Schaft anzubringen, die die Oberseite und die Unterseite des Schaftes bzw. des Sollbruchabschnitts nicht durchgreift. Die Strickmaschinennadel kann dabei einen Sollbruchabschnitt aufweisen, der an der Stelle mit maximal reduziertem Querschnitt eine Reduktion um minimal 10% und maximal 60% der Höhe bzw. der Höhenabmaße des angrenzenden Schaftes bzw. der angrenzenden Schaftabschnitte aufweist. Damit verbleiben 40% bis 90% der Querschnittsfläche (in einer Ebene quer zur Längsrichtung der Nadel) an der dünnsten Stelle des Sollbruchabschnitts übrig. Insbesondere, wenn eine Mehrzahl von Einkerbungen vorliegt, die aus verschiedenen Richtungen in den Schaft eingreifen (z. B. von oben und von unten), kann die betreffende Querschnitts- oder Höhenreduktion auch auf verschiedene Unterabschnitte des Sollbruchabschnitts verteilt sein (20% von oben, 25 % von unten). Durch kerbenförmige Ausgestaltung der querschnittsreduzierten Stellen des Sollbruchabschnitts kann eine in Längsrichtung relativ genau definierte Position für die Trennung des Hakens vom Antriebsabschnitt erhalten werden. An der Position des Sollbruchabschnitts findet eine Konzentration der Spannungen statt. Ergänzend oder alternativ kann natürlich auch die Breite der Nadel reduziert werden. Hierbei kann äquivalent zu den oben beschriebenen Maßnahmen zur Höhenreduktion der Schaftabmaße vorgegangen werden.The knitting machine needle can have a predetermined breaking section, which has a reduction in the shaft cross-section, which is achieved by reducing the shaft in the height direction. A predetermined breaking section configured in this way can have the advantage that it can also be attached during a punching process and thus no separate manufacturing process is required. The predetermined breaking section can thus be produced inexpensively. The height of the shaft in the height direction can be reduced from above and / or from below. However, it would also be conceivable to make a recess (or more) in the shaft which does not pass through the top and bottom of the shaft or the predetermined breaking section. The knitting machine needle can have a predetermined breaking section, which has a reduction of at least 10% and a maximum of 60% of the height or the height dimensions of the adjacent shaft or the adjacent shaft sections at the point with a maximum reduced cross section. This leaves 40% to 90% of the cross-sectional area (in a plane transverse to the longitudinal direction of the needle) at the thinnest point of the predetermined breaking section. Especially if there are a plurality of notches that engage the shaft from different directions (e.g. from above and from below), the cross-section or height reduction in question can also be distributed over different subsections of the predetermined breaking section (20% from above, 25% from below). A notch-shaped configuration of the reduced-cross-section points of the predetermined breaking section enables a position which is relatively precisely defined in the longitudinal direction to be obtained for separating the hook from the drive section. The stresses are concentrated at the position of the predetermined breaking section. Additionally or alternatively, the width of the needle can of course also be reduced. This can be done in an equivalent way to the measures described above for reducing the height of the shaft dimensions.
Die Strickmaschinennadel kann eine Reduktion des Schaftes in Höhenrichtung aufweisen, die eine dreieckige Form mit einem Öffnungswinkel von 60° bis 120° hat. Besonders vorteilhaft kann ein Öffnungswinkel von 90° sein. Dabei können die drei im Schaft entstandenen Ecken verrundet sein. Bei kleinen Reduktionen in der Höhenrichtung ist ein Radius der Verrundung von mindestens 0,02mm vorteilhaft, bei größeren Reduktionen in der Höhenrichtung können die Verrundungen auch vorteilhaft mit Radien von 0,35mm oder zum Beispiel auch 0,4mm oder 0,5mm ausgeführt sein. Die Höhenreduktion kann auch trapezförmig, in Form einer Stufe oder anders geometrisch ausgeführt sein. Angesichts der vorstehenden Ausführungen werden auch hier die Unterschiede zu Kehlen, die zum Beispiel die Maschen beim Gleiten über die Zunge in ihrer Rücklage entlasten, deutlich: Solche Kehlen haben größere Öffnungswinkel und einen flachen Verlauf, um einen einfachen Ein- und Austritt der Masche zu gestatten. Demgegenüber sollen die meisten Sollbruchabschnitte einen definierten Bruch an einer definierten Stelle herbeiführen, so dass die Öffnungswinkel der Seitenflanken in einem solchen Sollbruchabschnitt kleiner sind. Auch aufgrund der spezifischen Form, die für einen Sollbruchabschnitt vorteilhaft ist, ist es empfehlenswert, einen solchen Sollbruchabschnitt an einer Stelle zu positionieren, die für eine Maschenentlastungskehle eben nicht infrage kommt: die Maschenentlastungskehle befindet sich an einer Stelle, über die die Masche hinweg gleitet. Der Sollbruchabschnitt könnte aufgrund seiner Form die Masche "einfangen" und so den Strickprozess gefährden. Daher ist es wie erwähnt vorteilhaft, die Sollbruchstelle zum Beispiel hinter der Position der Zungenspitze bei Rücklage der Zunge zu positionieren. Eine weitere Erwägung, die für eine Positionierung des Sollbruchabschnittes im hinteren Bereich der Nadel spricht, ist die Hebelwirkung: wenn eine Masche und hier insbesondere eine nicht abgeschlagenen Masche große Kraft auf den Innenbereich des Hakens überträgt, steigert der Abstand von dem Haken die Hebelwirkung dieser Kraft auf den Sollbruchabschnitt.The knitting machine needle can have a reduction of the shaft in the height direction, which has a triangular shape with an opening angle of 60 ° to 120 °. An opening angle of 90 ° can be particularly advantageous. The three corners created in the shaft can be rounded. In the case of small reductions in the height direction, a radius of the rounding of at least 0.02 mm is advantageous; in the case of larger reductions in the height direction, the roundings can also advantageously be carried out with radii of 0.35 mm or, for example, 0.4 mm or 0.5 mm. The height reduction can also be trapezoidal, in the form of a step or in another form. In view of the above, the differences to throats, which, for example, relieve the pressure on the stitches when sliding over the tongue in their back, become clear: Such throats have larger opening angles and a flat profile in order to allow easy entry and exit of the stitch . In contrast, most predetermined breaking sections are intended to bring about a defined break at a defined point, so that the opening angles of the side flanks are smaller in such a predetermined breaking section. Also due to the specific shape, which is advantageous for a predetermined breaking section, it is recommended to position such a predetermined breaking section at a point that is not suitable for a stitch relief throat: the stitch relief throat is located at a point over which the stitch slides. The predetermined breaking section could "catch" the stitch due to its shape and thus endanger the knitting process. It is therefore advantageous, as mentioned, to position the predetermined breaking point, for example, behind the position of the tip of the tongue when the tongue is retracted. Another consideration that speaks for positioning the predetermined breaking section in the rear region of the needle is the leverage effect: if a stitch and here in particular a stitch that has not been knocked off transfers large force to the inside of the hook, the distance from the hook increases the leverage of this force on the predetermined breaking section.
Die Strickmaschinennadel kann einen Sollbruchabschnitt, dessen Material geringere Bruchdehnung als Abschnitte des restlichen Schaftes besitzt, aufweisen. Das Verhalten der Strickmaschinennadel bei Überlast kann durch diese Ausführung des Sollbruchabschnitts (zusätzlich oder alternativ zu einer Höhenreduktion oder ähnlicher Maßnahmen) gezielt gesteuert werden. Unterschiedliche Verformungen im plastischen Bereich des Materials werden zugunsten eines gezielten Bruches bei deutlicher Überschreitung der Last unterdrückt, für die die Strickmaschinennadel ausgelegt ist. Die Strickmaschinennadel ist vorteilhafterweise aus einem Stahl hergestellt. Eine Beeinflussung der Bruchdehnung kann bei Stahl über die gezielte Einstellung der Härte bzw. des Gefüges durchgeführt werden. So kann das Gefüge im Sollbruchabschnitt gezielt spröde und/oder grobkörnig ausgeführt werden.The knitting machine needle can have a predetermined breaking section, the material of which has a lower elongation at break than sections of the remaining shaft. The behavior of the knitting machine needle in the event of an overload can be specifically controlled by this design of the predetermined breaking section (in addition or as an alternative to a height reduction or similar measures). Different deformations in the plastic area of the material are suppressed in favor of a targeted break if the load for which the knitting machine needle is designed is clearly exceeded. The knitting machine needle is advantageously made of steel. In steel, the elongation at break can be influenced by adjusting the hardness or the structure. In this way, the structure in the predetermined breaking section can be made specifically brittle and / or coarse-grained.
Wie bereits eingangs erwähnt, treten die Probleme mit Schäden an Nadelbetten und Schlössern vornehmlich bei Stricksystemen, bei denen lange schlanke Strickmaschinennadeln bei hohen Strickgeschwindigkeiten eingesetzt werden, auf. Der Begriff "Nadelbetten" wird in der vorliegenden Druckschrift als Oberbegriff für diejenigen Teile von Stricksystemen verwendet, die Nadeln beim Strickbetrieb führen. Dies sind insbesondere Strickzylinder und Rippscheiben von Rundstrickmaschinen und flache Nadelbetten bei Flachstrickmaschinen.As already mentioned at the beginning, the problems with damage to needle beds and locks occur primarily in knitting systems in which long, slim knitting machine needles are used at high knitting speeds. The term "needle beds" is used in the present publication as a generic term for those parts of knitting systems that use needles in knitting. These are in particular knitting cylinders and dials of circular knitting machines and flat needle beds in flat knitting machines.
Die
Das erfindungsgemäße Stricksystem enthält ein Nadelbett mit Führungsmitteln und mindestens einem Kanalgrund, die dazu eingerichtet sind, Strickmaschinennadeln aufzunehmen und bei ihrer intermittierenden Bewegung in ihrer Längsrichtung zu führen und abzustützen. Hierbei können Nadelbetten in Form von Zylindern, Rippscheiben oder flachen Nadelbetten zum Beispiel für Flachstrickmaschinen in Frage kommen. Die Strickmaschinennadeln werden vom Nadelbett in Kanäle aufgenommen und werden von den Kanalstegen in der Breitenrichtung der Strickmaschinennadeln geführt und vom Kanalgrund in der negativen Höhenrichtung der Strickmaschinennadeln abgestützt. Insbesondere die Führung der Strickmaschinennadeln in Breitenrichtung erfolgt nicht unbedingt auf der ganzen Längserstreckung der Strickmaschinennadel, sondern kann auch nur in einem hinteren Abschnitt der Strickmaschinennadeln erfolgen. Die Strickmaschinennadel kann in anderen Abschnitten ihrer Längserstreckung zum Beispiel auch durch andere Strickwerkzeuge in Breitenrichtung geführt sein (dies ist zum Beispiel bei Stricksystemen nach den Druckschriften
Das erfindungsgemäße Stricksystem enthält außerdem zumindest ein Schlossteil zur Übertragung von Kraft auf zumindest einen ersten Antriebsabschnitt einer im Nadelbett aufgenommenen Strickmaschinennadel. Häufig steht ein Fuß der Strickmaschinennadel aus dem Kanal des Nadelbetts heraus und ist in einer bahnförmigen Vertiefung ("Schlosskurve") im Schlossteil aufgenommen. Normalerweise verfügt eine Rundstrickmaschine über eine Mehrzahl von Schlossteilen, die jeweils einen Teilabschnitt der Strecke definieren, die ein Nadelfuß (eines Kupplungsteils) bei einer Gesamtdrehung des Nadelzylinders einer Rundstrickmaschine durchläuft. Durch diese Relativbewegung der Strickmaschinennadel zu den Schlossteilen in der Breitenrichtung der Nadel übertragen die Schlossteile die Kraft auf den betreffenden Antriebsabschnitt bzw. Nadelfuß, die die Nadel während des Strickbetriebes in einer Rundstrickmaschine in der Längsrichtung der Nadel bewegt.The knitting system according to the invention also contains at least one lock part for transmitting force to at least a first drive section of a knitting machine needle accommodated in the needle bed. One foot of the knitting machine needle often protrudes from the channel of the needle bed and is received in a web-shaped depression (“lock curve”) in the lock part. Normally, a circular knitting machine has a plurality of lock parts, each of which defines a partial section of the distance that a needle foot (a coupling part) travels during a total rotation of the needle cylinder of a circular knitting machine. Due to this relative movement of the knitting machine needle to the lock parts in the width direction of the needle, the lock parts transmit the force to the relevant drive section or needle foot, which moves the needle during the knitting operation in a circular knitting machine in the longitudinal direction of the needle.
Gegenstand der vorliegenden Druckschrift ist auch ein Stricksystem, das eine Anzahl von Strickmaschinennadeln aufweist, wobei jede dieser Strickmaschinennadeln ihrerseits die folgenden Merkmale enthält:
- einen Haken zur Bildung von Maschen, der den Schaft in der Längsrichtung des Schaftes begrenzt und der in einer Hakenspitze ausläuft,
- einen in der Längsrichtung des Schaftes auf den Haken folgenden ersten Antriebsabschnitt
- a hook for forming stitches, which delimits the shaft in the longitudinal direction of the shaft and which ends in a hook tip,
- a first drive section following the hook in the longitudinal direction of the shaft
Das erfindungsgemäße Stricksystem ist dadurch gekennzeichnet, dass zumindest eine der Strickmaschinennadeln einen Sollbruchabschnitt zur Trennung des Hakens von dem ersten Antriebsabschnittaufweist. Der Sollbruchabschnitt wird durch einen ersten Abschnitt des Schaftes, der sich in dessen Längsrichtung erstreckt, gebildet. Der Sollbruchabschnitt befindet sich gänzlich in dem ersten Schaftabschnitt, der sich in der Längsrichtung des Schaftes zwischen der Spitze des Hakens und dem ersten Antriebsabschnitterstreckt.The knitting system according to the invention is characterized in that at least one of the knitting machine needles has a predetermined breaking section for separating the hook from the first drive section. The predetermined breaking section is formed by a first section of the shaft, which extends in the longitudinal direction thereof. The predetermined breaking section is entirely in the first shaft section, which extends in the longitudinal direction of the shaft between the tip of the hook and the first drive section.
Durch den Sollbruchabschnitt führen außergewöhnlich große Kräfte, die am Haken in der negativen Höhenrichtung der Strickmaschinennadel angreifen, zur Trennung des Hakens vom ersten Antriebsabschnitt. Dadurch werden diese Kräfte nicht auf den Abschnitt des Schaftes übertragen, der sich in unmittelbarer Nähe zum Schlossteil befindet. Durch diese Maßnahme werden durch Kollisionen ausgelöste Schäden am Nadelbett und den Schlossteilen ausgeschlossen oder zumindest reduziert.Due to the predetermined breaking section, extraordinarily large forces which act on the hook in the negative height direction of the knitting machine needle lead to the separation of the hook from the first drive section. As a result, these forces are not transferred to the section of the shaft that is in the immediate vicinity of the lock part. This measure prevents or at least reduces damage to the needle bed and the lock parts caused by collisions.
Das erfindungsgemäße Stricksystem kann derart ausgestaltet sein, dass die Führungsmittel und der mindestens eine Kanalgrund des Nadelbettes, das zumindest eine Schlossteil sowie die Position des Antriebsabschnitts und des Sollbruchabschnittes an der zumindest einen Strickmaschinennadel derart abgestimmt sind, dass die zumindest eine Strickmaschinennadel im Strickbetrieb zumindest zeitweise so weit aus den Führungsmitteln ausgetrieben wird, dass die Führungsmittel den Sollbruchabschnitt der zumindest einen Strickmaschinennadel zumindest teilweise nicht mehr abstützen. Der Sollbruchabschnitt befindet sich zumindest im ausgetriebenen Zustand der Strickmaschinennadel oberhalb des ersten Schloßsegments. Durch diese spezielle Abstimmung kann das Verhalten des Systems präzise gesteuert werden, wenn ungewöhnlich hohe Kräfte am Haken bzw. am nicht mehr abgestützten Abschnitt der Strickmaschinennadel angreifen. Die hohen Kräfte können dann gegebenenfalls über einen relativ langen Hebel vom Haken bis zum Sollbruchabschnitt wirken. Da der Sollbruchabschnitt ungefähr an einer Stelle liegt, an der die Unterstützung der ausgetriebenen Strickmaschinennadel durch das Nadelbett beginnt, ergibt sich mit höchster Wahrscheinlichkeit ein sehr definierter Bruch am bzw. im Sollbruchabschnitt. Hierbei ist also wichtig, dass der Sollbruchabschnitt nicht zu weit vorne in Richtung auf den Haken angeordnet ist, weil sich sonst aufgrund der Hebelwirkung ein undefinierter Bruch an der Stelle ergeben kann, an der die Strickmaschinennadel wieder vom Nadelbett unterstützt wird. Liegt der Sollbruchabschnitt komplett im unterstützten Bereich, kann sich ein undefinierter Bruch an der Kante des Nadelbetts ergeben. Hohe Kräfte können zum Beispiel durch den Warenabzug auftreten, wenn Maschen nicht abgeschlagen werden und sich im Haken sammeln. Dann kann schnell eine Abzugskraft auf den Haken wirken, die die gewöhnlich auftretende Abzugskraft zum Beispiel um einen Faktor 2 oder mehr überschreitet.The knitting system according to the invention can be designed such that the guide means and the at least one channel base of the needle bed, the at least one lock part and the position of the drive section and the predetermined breaking section on the at least one knitting machine needle are coordinated in such a way that the at least one knitting machine needle in knitting operation is at least temporarily so is driven far out of the guide means that the guide means at least partially no longer support the predetermined breaking section of the at least one knitting machine needle. The predetermined breaking section is at least in the driven-out state of the knitting machine needle above the first lock segment. This special coordination enables the behavior of the system to be precisely controlled when unusually high forces act on the hook or on the section of the knitting machine needle that is no longer supported. The high forces can then possibly act via a relatively long lever from the hook to the predetermined breaking section. Since the predetermined breaking section lies approximately at a point at which support of the knitting machine needle driven out by the needle bed begins, there is a very high probability that a very defined break occurs on or in the predetermined breaking section. So here is It is important that the predetermined breaking section is not arranged too far forward in the direction of the hook, because otherwise an undefined breakage can result at the point at which the knitting machine needle is supported by the needle bed due to the leverage effect. If the predetermined breaking section lies completely in the supported area, an undefined break can result at the edge of the needle bed. For example, high forces can occur due to the withdrawal of goods if stitches are not knocked off and accumulate in the hook. Then a pulling force can quickly act on the hook that exceeds the commonly occurring pulling force, for example by a factor of 2 or more.
Die Verwendung von Nadeln nach der vorliegenden Druckschrift ist bei Stricksystemen, wie sie in der
- Fig. 1
-
zeigt eine Strickmaschinennadel in einer GesamtansichtFigur 1 - Fig. 2
-
zeigt einen vergrößerten Ausschnitt der Strickmaschinennadel ausFigur 2Figur 1 . - Fig. 3
-
zeigt einen vergrößerten Ausschnitt einer alternativen Ausführungsform einer Strickmaschinennadel ähnlich wie inFigur 3 .Figur 2 - Fig. 4
-
zeigt eine alternative Ausführungsform einer Strickmaschinennadel in einer GesamtansichtFigur 4 - Fig. 5
-
zeigt einen vergrößerten Ausschnitt der Strickmaschinennadel ausFigur 5Figur 4 - Fig. 6
-
zeigt einen vergrößerten Ausschnitt einer alternativen Ausführungsform einer Strickmaschinennadel ähnlich wie inFigur 6 .Figur 5 - Fig. 7
-
Figur 7 zeigt den vergrößerten Ausschnitt der Strickmaschinennadel ausFigur 2 mit zusätzlicher Darstellung der Schließlage der Zunge und zwei Querschnittsansichten. - Fig. 8
-
zeigt ein Stricksystem gemäß der Erfindung in symbolischer Darstellung.Figur 8
- Fig. 1
-
Figure 1 shows a knitting machine needle in an overall view - Fig. 2
-
Figure 2 shows an enlarged section of the knitting machine needleFigure 1 . - Fig. 3
-
Figure 3 shows an enlarged section of an alternative embodiment of a knitting machine needle similar to that inFigure 2 . - Fig. 4
-
Figure 4 shows an alternative embodiment of a knitting machine needle in an overall view - Fig. 5
-
Figure 5 shows an enlarged section of the knitting machine needleFigure 4 - Fig. 6
-
Figure 6 shows an enlarged section of an alternative embodiment of a knitting machine needle similar to that inFigure 5 . - Fig. 7
-
Figure 7 shows the enlarged section of the knitting machine needleFigure 2 with additional representation of the closed position of the tongue and two cross-sectional views. - Fig. 8
-
Figure 8 shows a knitting system according to the invention in a symbolic representation.
In der vergrößerten Ansicht der
Die
Die
Der Sollbruchabschnitt 9 ist in der vergrößerten Darstellung in der
Des Weiteren sind in
Claims (14)
gekennzeichnet durch
einen Sollbruchabschnitt (9),
marked by
a predetermined breaking section (9),
gekennzeichnet durch
eine Zunge (6), die an dem Schaft (3) derart drehbar angelenkt ist, dass sie in ihrer Schließposition (7) den Innenraum des Hakens (2) verschließt und dass die Spitze der Zunge (6) in ihrer Rücklagenposition (8)in der Längsrichtung (z) des Schaftes (3) auf den Antriebsabschnitt (33) weist,Knitting machine needle (1) according to claim 1 or 2
marked by
a tongue (6) which is pivoted on the shaft (3) in such a way that it closes the interior of the hook (2) in its closed position (7) and that the tip of the Tongue (6) in its reserve position (8) in the longitudinal direction (z) of the shaft (3) points to the drive section (33),
dadurch gekennzeichnet, dass
characterized in that
dadurch gekennzeichnet, dass
sich der Sollbruchabschnitt (9) gänzlich in einem dritten Schaftabschnitt (13) befindet,
characterized in that
the predetermined breaking section (9) is located entirely in a third shaft section (13),
dadurch gekennzeichnet, dass
der hakenseitige Beginn (19) des ersten Antriebsabschnitts (33) in Längsrichtung (z) einen Abstand von mindestens 75mm zu dem hakenseitigen Beginn (20) der Nadel (1) in Längsrichtung (z) des Schaftes (3) aufweist.Knitting machine needle (1) according to one of the preceding claims
characterized in that
the hook-side start (19) of the first drive section (33) in the longitudinal direction (z) is at least 75 mm from the hook-side start (20) of the needle (1) in the longitudinal direction (z) of the shaft (3).
dadurch gekennzeichnet, dass
der Antriebsabschnitt (33) durch einen Fuß (5) gebildet ist, der den Schaft (3) in der positiven Höhenrichtung (x) des Schaftes (3) überragt.Knitting machine needle (1) according to one of the preceding claims
characterized in that
the drive section (33) is formed by a foot (5) which projects above the shaft (3) in the positive height direction (x) of the shaft (3).
dadurch gekennzeichnet, dass
der Sollbruchabschnitt (9) eine Reduktion (21) des Schaftquerschnitts senkrecht zur Längsrichtung (z) aufweist.Knitting machine needle (1) according to one of the preceding claims
characterized in that
the predetermined breaking section (9) has a reduction (21) of the shaft cross section perpendicular to the longitudinal direction (z).
dadurch gekennzeichnet, dass
der Sollbruchabschnitt (9) eine Reduktion (21) des Schaftquerschnitts (22) durch eine Reduktion der Schaftabmaße in Höhenrichtung (x) aufweist.Knitting machine needle (1) according to the preceding claim
characterized in that
the predetermined breaking section (9) has a reduction (21) of the shaft cross section (22) by a reduction in the shaft dimensions in the height direction (x).
gekennzeichnet durch
einen Sollbruchabschnitt (9), der an seiner Stelle mit der größten Reduktion (21) des Schaftquerschnittes (22), eine Reduktion der Schaftabmaße in Höhenrichtung (x) von minimal 10% und maximal 50% aufweist.Knitting machine needle (1) according to claim 9
marked by
a predetermined breaking section (9) which, in its place with the greatest reduction (21) of the shaft cross-section (22), has a reduction in the shaft dimensions in the vertical direction (x) of a minimum of 10% and a maximum of 50%.
dadurch gekennzeichnet, dass
die Reduktion der Schaftabmaße in Höhenrichtung (x) einen Verlauf aufweist, der in der Ebene, die durch die Höhenrichtung (x) und die Längsrichtung (z) aufgespannt wird, eine dreieckförmige oder trapezförmige Gestalt (26) aufweist, deren Seitenflanken (25) einen Öffnungswinkel von 60° bis 120° zueinander haben.Knitting machine needle (1) according to one of claims 9 to 10
characterized in that
the reduction of the shaft dimensions in the height direction (x) has a course which, in the plane spanned by the height direction (x) and the longitudinal direction (z), has a triangular or trapezoidal shape (26), the side flanks (25) of which are one Have opening angles of 60 ° to 120 ° to each other.
dadurch gekennzeichnet, dass
der Sollbruchabschnitt (9) zumindest teilweise Material geringerer Bruchdehnung als Abschnitte (10, 11, 13) des restlichen Schaftes (3) und insbesondere als die dem Sollbruchabschnitt (9) benachbarten Bereiche (23, 24) des Schaftes (3) aufweist.Knitting machine needle (1) according to one of the preceding claims
characterized in that
the predetermined breaking section (9) at least partially has material of lower elongation at break than sections (10, 11, 13) of the remaining shaft (3) and in particular as the regions (23, 24) of the shaft (3) adjacent to the predetermined breaking section (9).
dadurch gekennzeichnet dass
die Führungsmittel (17) und der mindestens eine Kanalgrund (32) des Nadelbettes (16), das zumindest eine Schlossteil (18) sowie die Position des ersten Antriebsabschnitts (33) und des Sollbruchabschnittes (9) an der zumindest einen Strickmaschinennadel (1) derart abgestimmt sind,
characterized in that
the guide means (17) and the at least one channel base (32) of the needle bed (16), the at least one lock part (18) and the position of the first drive section (33) and the predetermined breaking section (9) on the at least one knitting machine needle (1) in this way are coordinated
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
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PT191547553T PT3690095T (en) | 2019-01-31 | 2019-01-31 | Knitting machine needle and knitting system |
EP19154755.3A EP3690095B1 (en) | 2019-01-31 | 2019-01-31 | Knitting machine needle and knitting system |
TW108142710A TW202045789A (en) | 2019-01-31 | 2019-11-25 | Knitting machine needle and knitting system |
BR112021005119-8A BR112021005119B1 (en) | 2019-01-31 | 2020-01-21 | KNITTING MACHINE NEEDLE AND KNITTING SYSTEM |
CN202080011906.7A CN113574218B (en) | 2019-01-31 | 2020-01-21 | Knitting machine needle and knitting system |
PCT/EP2020/051356 WO2020156875A1 (en) | 2019-01-31 | 2020-01-21 | Knitting machine needle and knitting system |
KR1020217014301A KR20210122223A (en) | 2019-01-31 | 2020-01-21 | Knitting Machine Needles and Knitting Systems |
JP2021523400A JP2022519143A (en) | 2019-01-31 | 2020-01-21 | Knitting machine needles and knitting system |
ARP200100179A AR117875A1 (en) | 2019-01-31 | 2020-01-24 | KNITTING MACHINE NEEDLE AND FABRIC SYSTEM |
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EP19154755.3A EP3690095B1 (en) | 2019-01-31 | 2019-01-31 | Knitting machine needle and knitting system |
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EP3690095A1 true EP3690095A1 (en) | 2020-08-05 |
EP3690095B1 EP3690095B1 (en) | 2022-05-18 |
Family
ID=65275993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19154755.3A Active EP3690095B1 (en) | 2019-01-31 | 2019-01-31 | Knitting machine needle and knitting system |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP3690095B1 (en) |
JP (1) | JP2022519143A (en) |
KR (1) | KR20210122223A (en) |
CN (1) | CN113574218B (en) |
AR (1) | AR117875A1 (en) |
BR (1) | BR112021005119B1 (en) |
PT (1) | PT3690095T (en) |
TW (1) | TW202045789A (en) |
WO (1) | WO2020156875A1 (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US664808A (en) * | 1899-12-13 | 1900-12-25 | Dodge Needle Company | Knitting-machine needle. |
US3417580A (en) * | 1965-12-28 | 1968-12-24 | Forsch Textil Technologie | Method of making textile fabric on sewing-knitting machines |
DE1635837A1 (en) | 1966-09-02 | 1970-01-15 | Lebocey & Cie Georges | Needle for knitting machines |
DE3311361A1 (en) | 1983-03-29 | 1984-10-04 | SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt | KNITTING MACHINE FOR THE PRODUCTION OF KNITWEAR |
JPS62191888U (en) | 1986-05-21 | 1987-12-05 | ||
DE4320956A1 (en) | 1993-06-24 | 1995-01-12 | Johannes Prof Dr Rer N Gartzen | Method for the production of a predetermined breaking point on a machine needle |
DE19503048C2 (en) | 1995-02-01 | 1999-09-23 | Groz Beckert Kg | Needle, especially for large embroidery machines |
CN2534208Y (en) | 2002-01-25 | 2003-02-05 | 萧世贤 | Knitting needle with crease |
EP1424416A1 (en) | 2002-11-26 | 2004-06-02 | Groz-Beckert KG | Needle set |
DE102014118217A1 (en) | 2014-12-09 | 2016-07-07 | Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh | Circular knitting machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10333172B4 (en) * | 2003-07-22 | 2006-01-19 | Groz-Beckert Kg | Knitting machine needle |
JP2010013787A (en) * | 2008-06-03 | 2010-01-21 | Tokyo Metropolitan Industrial Technology Research Institute | Knitting needle and production method thereof |
PT2540889T (en) * | 2010-07-06 | 2016-09-19 | Groz Beckert Kg | Knitting system with flattened guide channels |
PT2927360T (en) * | 2014-04-03 | 2017-04-20 | Groz Beckert Kg | Knitting tool for knitting machines |
-
2019
- 2019-01-31 PT PT191547553T patent/PT3690095T/en unknown
- 2019-01-31 EP EP19154755.3A patent/EP3690095B1/en active Active
- 2019-11-25 TW TW108142710A patent/TW202045789A/en unknown
-
2020
- 2020-01-21 CN CN202080011906.7A patent/CN113574218B/en active Active
- 2020-01-21 WO PCT/EP2020/051356 patent/WO2020156875A1/en active Application Filing
- 2020-01-21 JP JP2021523400A patent/JP2022519143A/en active Pending
- 2020-01-21 KR KR1020217014301A patent/KR20210122223A/en unknown
- 2020-01-21 BR BR112021005119-8A patent/BR112021005119B1/en active IP Right Grant
- 2020-01-24 AR ARP200100179A patent/AR117875A1/en active IP Right Grant
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US664808A (en) * | 1899-12-13 | 1900-12-25 | Dodge Needle Company | Knitting-machine needle. |
US3417580A (en) * | 1965-12-28 | 1968-12-24 | Forsch Textil Technologie | Method of making textile fabric on sewing-knitting machines |
DE1635837A1 (en) | 1966-09-02 | 1970-01-15 | Lebocey & Cie Georges | Needle for knitting machines |
DE3311361A1 (en) | 1983-03-29 | 1984-10-04 | SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt | KNITTING MACHINE FOR THE PRODUCTION OF KNITWEAR |
JPS62191888U (en) | 1986-05-21 | 1987-12-05 | ||
DE4320956A1 (en) | 1993-06-24 | 1995-01-12 | Johannes Prof Dr Rer N Gartzen | Method for the production of a predetermined breaking point on a machine needle |
DE19503048C2 (en) | 1995-02-01 | 1999-09-23 | Groz Beckert Kg | Needle, especially for large embroidery machines |
CN2534208Y (en) | 2002-01-25 | 2003-02-05 | 萧世贤 | Knitting needle with crease |
EP1424416A1 (en) | 2002-11-26 | 2004-06-02 | Groz-Beckert KG | Needle set |
DE102014118217A1 (en) | 2014-12-09 | 2016-07-07 | Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh | Circular knitting machine |
Also Published As
Publication number | Publication date |
---|---|
BR112021005119B1 (en) | 2023-05-02 |
KR20210122223A (en) | 2021-10-08 |
AR117875A1 (en) | 2021-09-01 |
WO2020156875A1 (en) | 2020-08-06 |
CN113574218B (en) | 2023-07-04 |
TW202045789A (en) | 2020-12-16 |
EP3690095B1 (en) | 2022-05-18 |
JP2022519143A (en) | 2022-03-22 |
BR112021005119A2 (en) | 2021-06-15 |
PT3690095T (en) | 2022-06-27 |
CN113574218A (en) | 2021-10-29 |
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