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EP3690095B1 - Aiguille du métier à tricoter et système de tricotage - Google Patents

Aiguille du métier à tricoter et système de tricotage Download PDF

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Publication number
EP3690095B1
EP3690095B1 EP19154755.3A EP19154755A EP3690095B1 EP 3690095 B1 EP3690095 B1 EP 3690095B1 EP 19154755 A EP19154755 A EP 19154755A EP 3690095 B1 EP3690095 B1 EP 3690095B1
Authority
EP
European Patent Office
Prior art keywords
knitting machine
shank
machine needle
needle
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.)
Active
Application number
EP19154755.3A
Other languages
German (de)
English (en)
Other versions
EP3690095A1 (fr
Inventor
Jörg Sauter
Uwe Stingel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Groz Beckert KG filed Critical Groz Beckert KG
Priority to PT191547553T priority Critical patent/PT3690095T/pt
Priority to EP19154755.3A priority patent/EP3690095B1/fr
Priority to TW108142710A priority patent/TWI859169B/zh
Priority to JP2021523400A priority patent/JP2022519143A/ja
Priority to PCT/EP2020/051356 priority patent/WO2020156875A1/fr
Priority to CN202080011906.7A priority patent/CN113574218B/zh
Priority to BR112021005119-8A priority patent/BR112021005119B1/pt
Priority to KR1020217014301A priority patent/KR20210122223A/ko
Priority to ARP200100179A priority patent/AR117875A1/es
Publication of EP3690095A1 publication Critical patent/EP3690095A1/fr
Application granted granted Critical
Publication of EP3690095B1 publication Critical patent/EP3690095B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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 often moved over one or more butts of the knitting machine needle in a channel of a needle bed of the knitting machine. For this purpose, the butt of the knitting machine needle interacts with a lock on the knitting machine. In the case of high-speed knitting machines in particular, the knitting machine needle is subjected to strong accelerations. Knitting machine needles that have a latch are often used ("latch needles"). The tongue performs numerous rapid pivoting movements that serve to form stitches together with a hook. The high dynamics of this pivoting movement can lead to errors in stitch formation on high-speed knitting machines. Such failures are favored by the inevitable wear and tear on the hook and tongue. The hook and the latch are arranged at a front end of the knitting machine needle and connected to the butt of the knitting machine needle via a shank.
  • the JP62191888U and the EP1424416A1 proposed to apply predetermined breaking points to the foot of knitting machine needles so that the foot breaks off before major damage occurs.
  • a similar predetermined breaking point is also shown in CN2534208Y .
  • the in the CN2534208Y The illustrated needle has a groove in the underside of the needle shaft below the position of the latch return. Such a groove serves to relieve the strain on the stitch when the stitch slides over the tongue which is in the reverse position. This strain relief occurs when the existing fabric (preferably the previous stitch) engages in this groove.
  • Such throats for strain relief are in many designs of knitting machine needles below or in the immediate vicinity of the to find the tongue-retraction position. These grooves are not predetermined breaking points, since the grooves 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 equipped with sections on the shank designed to prevent the transmission of shock waves from the foot to the hook. These sections can be designed as sections with modified mechanical properties or as sections with a reduction in the cross section of the needle. In each exemplary embodiment, the special sections are implemented at points on the shaft where the shaft has its greatest height. It is therefore not a question of predetermined breaking points, since the shaft is not very likely to break at these points.
  • the DE4320956A1 and the DE19503048C2 show predetermined breaking points on sewing or embroidery needles.
  • the DE3311361 A1 shows a knitting system with such long, slender knitting machine 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 the formation of stitches, which delimits the shank in the longitudinal direction of the shank, or starts there, and which ends in a hook point.
  • the hook is followed by a first drive section.
  • the force for moving the knitting machine needle is transmitted from a cam part of the knitting machine to the drive section of the knitting machine needle.
  • the drive section can be designed as a foot that protrudes beyond the shaft in the positive vertical 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 also include a latch.
  • the tongue can be pivoted on the shank 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 retracted position in the longitudinal direction of the shank is on the first Drive section has.
  • the tongue can be rotatably mounted on the shank on pins formed on the shank, a hinge or an axle.
  • the knitting machine needle according to the invention is characterized by a predetermined breaking section for separating the hook from the first driving section, which is formed by a section of the shank extending in the longitudinal direction thereof.
  • a "section”, as used herein, means greater than infinitesimal length in the longitudinal direction of the needle.
  • the frangible portion is located entirely within a first shank portion extending in the longitudinal direction of the shank between the tip of the hook and the first drive portion.
  • a predetermined breaking portion has a non-infinite extent in the longitudinal direction of the knitting machine needle.
  • the knitting machine needle is likely to break at the breaking point due to forces transmitted through the yarn when the movement of the needle in the needle bed is impeded or the stitch fails to be knocked over.
  • the shank of the knitting machine needle extends over the entire length of the same.
  • the shaft can only be divided into different functional sections.
  • An end portion of the shank forms a hook and has adjacent to this hook a portion which can come into contact with a yarn in the knitting process.
  • the shank includes a section (the drive section or butt) via which the movement of the knitting machine needle is initiated.
  • Sections lying between the above sections are used, for example, to guide the knitting machine needle (in a needle bed) and connect the above functional sections.
  • a frangible portion will advantageously be located in a portion of the shank that serves the functions of guiding and connecting other functional portions.
  • the shank can have sections with different heights.
  • the sections of the shaft of different heights can merge into one another at transition points.
  • a first transition point may be located near the drive section.
  • a second transition point may be located near the hook.
  • the second transition point can be double or longitudinal in the longitudinal direction spaced three times as far from the tip of the hook as the tip of the tongue in the supine position of the tongue.
  • the distance of the second transition point from the tip of the hook can also have any value 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 that acts on the hook and is less than 80% of the force at which a needle of the same construction 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 when a corresponding force acts on the hook in a negative vertical direction. It is clear to the person skilled in the art that at least the diameter (“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 property that has a major influence on the design of the predetermined breaking section.
  • the gauge (or "press") of the knitting machine needle may be determined by the gauge of the tape from which the knitting machine needle is stamped and may be measured in the width direction of the knitting machine needle. With a needle with a pressure of 0.4mm, the force at which the hook is separated from the first drive section can be approximately from 5N to IN depending on the design of the predetermined breaking section, while a knitting machine needle of the same construction would be permanently deformed at approximately 8N. "Deform” is used here in particular as a generic term for "bending".
  • a special test for verifying the suitability of a predetermined breaking section consists of placing the needle with its underside (the side facing away from the foot in its height direction) on a table, pushing the needle on the table, hook first, over the edge of the table until the hook-side (front) part of the needle protrudes at least up to the predetermined breaking section over the edge of the table. If the hook is then subjected to a defined breaking or buckling force, the break should take place at the predetermined breaking section. If the force is further increased (examples see above) and plastic deformation occurs and there is no breakage, the suitability of the needle for the purposes of this document must be doubted.
  • the knitting machine needle may have a predetermined breaking portion located entirely within a second shank portion, the second shank portion being in Extends longitudinally of the shaft between the position of the tip of the tongue in the retracted position of the tongue and the first drive section.
  • the knitting machine needle may have a predetermined breaking portion which is located entirely in a third shank portion which begins in the longitudinal direction of the knitting machine needle at the point which is spaced two tongue lengths from the point of articulation of the tongue in the direction of the first butt and in the longitudinal direction of the knitting machine needle terminating at the point three tongue lengths from the pivot point of the tongue toward the first drive portion, the tongue length being the distance between the pivot point of the tongue and the tip of the tongue.
  • This articulation or bearing point of the tongue can have a bearing seat in the tongue in the form of a circular opening into which an axle 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 that is farthest from this center point, 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 shank portion may extend from the pivot point of the tongue to a second transition point.
  • a fifth shank portion may extend from the position of the tongue tip in the rear position to a second transition point.
  • the predetermined breaking section can be located in a sixth shank section described below:
  • compound needles have guide means for a slider (a hook closing element) at a distance in the longitudinal direction from the point of the hook, which are located 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 between the tip of the hook and the guide means in the longitudinal direction.
  • the sixth shank portion may extend from 1.5 times the minimum distance to three times the minimum distance from the hook tip.
  • 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 shank to the hook-side beginning of the first drive section or the first butt in the longitudinal direction.
  • the knitting machine needle can have a shank which has a height ("chest height") of 0.8 to 1.5 mm in the area in which the latch is articulated on the shank, at the highest point in this area. This height is measured in the height direction.
  • the knitting machine needle can have a shank which, in the section in which the predetermined breaking section is arranged, can have a height which is between 50% and 70% of the breast height.
  • the knitting machine needle can have a shank which is stamped out of a band material and which, in the areas in which its thickness still corresponds to the thickness of the band material, has a thickness, measured in the width direction, of 0.3 to 0.6 mm or up to 0.7 mm to have.
  • the knitting machine needle can include a predetermined breaking section, which has a reduction in the shank cross section perpendicular to the longitudinal direction.
  • the plane spanned by the height direction x and the width direction y of the needle runs “perpendicular to the longitudinal direction”.
  • the knitting machine needle can have a predetermined breaking section, which has a reduction in the shank cross section, which is achieved by reducing the shank in the vertical direction.
  • a predetermined breaking section designed in this way can have the advantage that it can also be attached during a stamping process and thus no separate manufacturing process is required.
  • the predetermined breaking section can thus be produced inexpensively.
  • the height of the shaft can be reduced in the height direction from above and/or from below. However, it would also be conceivable to provide a recess (or several) in the shank that does not reach through the upper side and the underside of the shank or the predetermined breaking section.
  • the knitting machine needle can have a predetermined breaking section which, at the point with a maximum reduced cross section, has a reduction of at least 10% and at most 60% in the height or the height dimensions of the adjoining shank or the adjoining shank sections. 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.
  • the reduction in cross-section or height in question can also be distributed over different sub-sections of the predetermined breaking section (20% from above, 25% from below).
  • a notched configuration of the cross-sectionally reduced points of the predetermined breaking section makes it possible to obtain a position that is relatively precisely defined in the longitudinal direction for separating the hook from the drive section.
  • a concentration of stresses takes place at the position of the frangible portion.
  • the width of the needle can of course also be reduced. The procedure can be equivalent to the measures described above for reducing the height of the shaft dimensions.
  • the knitting machine needle may have a shank reduction in the height direction, which has a triangular shape with an included angle of 60° to 120°. An opening angle of 90° can be particularly advantageous.
  • the three corners formed in the shaft can be rounded. With small reductions in the height direction, a radius of rounding of at least 0.02 mm is advantageous, with larger reductions in the height direction, the roundings can also advantageously be designed with radii of 0.35 mm or, for example, 0.4 mm or 0.5 mm.
  • the reduction in height can also be trapezoidal, in the form of a step or have a different geometry.
  • grooves which for example relieve the stitches when sliding over the tongue in their backward position
  • Such grooves have a larger opening angle and a flat profile to allow the stitch to enter and exit easily .
  • most predetermined breaking sections should 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 stitch relief groove is in a place over which the stitch slides. Due to its shape, the predetermined breaking section could "catch" the stitch and thus endanger the knitting process.
  • the predetermined breaking point for example, behind the position of the tip of the latch when the latch is in the back position.
  • Another consideration that speaks in favor of positioning the predetermined breaking section in the rear area of the needle is the leverage effect: when a stitch, and here in particular a stitch that has not been knocked off transfers large force to the interior of the hook, the distance from the hook increases the leverage of that force on the breakaway portion.
  • 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 embodiment of the predetermined breaking section (in addition to or as an alternative to a reduction in height or similar measures). Different deformations in the plastic range of the material are suppressed in favor of a targeted break when the load for which the knitting machine needle is designed is significantly exceeded.
  • the knitting machine needle is advantageously made of steel. In the case of steel, the elongation at break can be influenced by specifically adjusting the hardness or the structure. In this way, the structure in the predetermined breaking section can be designed to be brittle and/or coarse-grained.
  • needle beds is used in the present publication as a generic term for those parts of knitting systems that guide needles during knitting. In particular, these are knitting cylinders and dials on circular knitting machines and flat needle beds on flat knitting machines.
  • the DE3311361A1 and the DE102014118217A1 describe measures to be able to further increase the performance of high-speed knitting machines and show examples of typical knitting systems with corresponding knitting machine needles in the figures.
  • the present invention deals in particular with the improvement of knitting machine needles and knitting systems which are suitable for the high-performance requirements indicated in these documents.
  • the two publications describe knitting systems with knitting needles that have a very long, thin shank section between the hook and the first foot. Large parts of this long and thin shank section are guided laterally (in the direction of the width of the needle) in the relevant needle beds according to the two aforementioned documents, not by webs of the needle bed, but by sinkers. Knitting systems of the aforementioned type achieve high knitting performance with a high degree of fineness.
  • 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, for example for flat knitting machines, can be considered.
  • the knitting machine needles are accommodated in channels by the needle bed and are guided by the channel webs in the width direction of the knitting machine needles and are 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 along the entire length of the knitting machine needle, but can also only take place in a rear section of the knitting machine needles.
  • the knitting machine needle can also be guided in the width direction, for example, by other knitting tools (this is the case, for example, with knitting systems according to the publications DE3311361A1 and the DE102014118217A1 the case). The same applies to the support of the knitting machine needles on the bottom of the channel.
  • the knitting system according to the invention also contains at least one cam part for transmitting force to at least a first drive section of a knitting machine needle accommodated in the needle bed.
  • a butt of the knitting machine needle often protrudes from the channel of the needle bed and is accommodated in a web-shaped indentation ("cam") in the cam.
  • a circular knitting machine has a plurality of cams, each of which defines a portion of the path that a needle butt (of a clutch part) travels in one total rotation of the needle cylinder of a circular knitting machine. This relative movement of the knitting machine needle to the cams in the width direction of the needle, the cams transmit the force to the relevant drive section or needle butt that moves the needle in the longitudinal direction of the needle during knitting in a circular knitting machine.
  • 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 shank, which extends in its longitudinal direction.
  • the frangible portion is located entirely within the first shank portion, which extends in the longitudinal direction of the shank between the tip of the hook and the first drive portion.
  • the knitting system according to the invention can be designed in such a way that the guide means and the at least one channel base of the needle bed, the at least one cam 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 during knitting operation is at least temporarily is driven so far out of the guide means that the guide means no longer at least partially support the predetermined breaking section of the at least one knitting machine needle.
  • the predetermined breaking section is located above the first cam segment, at least when the knitting machine needle is in the driven-out state. This special tuning allows 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 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 the needle bed begins to support the driven-out knitting machine needle, there is a high probability of a very defined break occurring at or in the predetermined breaking section. It is therefore important here that the predetermined breaking section is not arranged too far forward in the direction of the hook, because otherwise an undefined breakage would occur on the hook due to the leverage effect Point can arise at which the knitting machine needle is again supported by the needle bed. If the predetermined breaking section is completely in the supported area, an undefined break can occur at the edge of the needle bed. High forces can occur, for example, due to the fabric being pulled off if stitches are not knocked off and accumulate in the hook. A pull-off force can then quickly act on the hook, which exceeds the usually occurring pull-off 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 that are not essential to the invention have been omitted.
  • the other figures are simplified accordingly.
  • a coordinate system showing the directions defined on the knitting machine needle 1 is shown for clarification.
  • the longitudinal direction of the knitting machine needle 1 is denoted by z, the width direction by y and the height direction by x.
  • On in the figure 1 left end in the longitudinal direction z the knitting machine needle 1 is the hook 2.
  • the knitting machine needle 1 has a butt 5 (also referred to as the drive section 33).
  • the foot 5 protrudes beyond the knitting machine needle 1 in the positive vertical direction x.
  • the shank 3 of the knitting machine needle 1 extends between the hook 2 and the foot 5.
  • the shank 3 clearly has a long and slender shape.
  • the length from the beginning 20 of the knitting machine needle 1 on the hook side to the beginning 19 of the first butt 5 on the hook side is approximately 78 mm in the present exemplary embodiment.
  • three sections (10, 11, 13) of the longitudinal extension of the shank 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 beginning of the first foot 5 on the hook side.
  • the hook tip (4) and the hook-side end 20 of the knitting machine needle 1 can be seen in particular.
  • Yarn loops for stitch formation are held in the interior of the hook 2 below the hook tip 4 during the knitting process.
  • the tongue 6, which is shown in its reverse 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 maximally directed towards the foot 5 (also referred to as the drive section 33) in the longitudinal direction z.
  • the tongue 6 is rotatably attached to the shaft 3 at the pivot point 14 .
  • the shank 3 has a predetermined breaking section 9 which has a notch or cut-out in which the height of the shank or the shank dimensions in the height direction x is reduced from above.
  • the recess in question has a triangular shape with a rounded tip. At the rounded tip, the triangle has an angle (“aperture angle") of 90°. The height of the shank 3 is reduced by approximately 50% at the point of the smallest remaining cross section.
  • the figure 3 essentially corresponds to the figure 2 , only an alternative exemplary embodiment of a predetermined breaking section 9 is shown.
  • the amount of reduction in cross section is smaller than that in the embodiment of FIG figure 2 .
  • the tip of the resulting recess can be rounded.
  • the corners that occur on the upper edge of the shaft 3 on the left and right of the predetermined breaking section 9 can also have a rounding in all of 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 shank 3 and the fifth section 31 of the shank 3 are indicated with curly brackets.
  • the shaft 3 has a maximum height up to the first transition point 28 (distance in the height direction x). After the first transition point 28 in the direction of the hook 2, the height of the shank 3 quickly reduces to a medium height. After the second transition point 29 in the direction of the hook 2, the height of the shank 3 is reduced again.
  • the fourth section 30 of the shank 3 extends in the longitudinal direction z of the knitting machine needle 1 from the articulation point 14 of the latch 6 to the second transition point 29.
  • the fifth section 31 of the shank 3 extends in the longitudinal direction z of the knitting machine needle 1 from the tip 12 of the Tongue 6 in the back position 8 up to the second transition point 29.
  • a minimum height of the shaft 3 and thus a suitable position for a predetermined breaking section 9 can be determined in both areas.
  • the shank section between the second transition point 29 and the first drive section 33 has a greater height of the shank and therefore does not offer an optimal position for a predetermined breaking section 9.
  • the predetermined breaking section 9 is shown in the enlarged view in FIG figure 5 better to recognize.
  • the knitting machine needle 1 of figure 5 differs essentially only by the design of the predetermined breaking section 9 of the knitting machine needle 1 from the Figures 2 and 3 .
  • the predetermined breaking section 9 is formed by reducing the height of the shank 3 in the height direction x from below. Otherwise this reduction "from below” is identical to that in figure 2 represented reduction "from above”.
  • reductions in the shank cross section can advantageously be carried out from above, from below or from both sides.
  • reductions in the width direction y can also be used.
  • FIG 6 shows an enlarged representation of the front area of a knitting machine needle 1, which, apart from the embodiment of the predetermined breaking section 9, essentially corresponds to that in FIGS Figures 1 to 5 illustrated knitting machine needles 1 corresponds.
  • the predetermined breaking section 9 is formed by a section of the shank 3 whose cross section is not adapted to form a predetermined breaking section 9 . Rather, the hatching of the shank 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 shank 3 .
  • Such an adaptation of the material properties in the predetermined breaking section 9 can be advantageously used for all exemplary embodiments of the invention as an alternative or in combination with other measures such as cross-sectional reductions.
  • figure 7 essentially corresponds to the figure 2 .
  • the tongue 6 is shown in its two extreme positions for clarity.
  • the tongue is shown both in its closed position 7 and in its retracted position 8 .
  • the adjacent areas of the predetermined breaking section 23, 24 are illustrated.
  • FIG 7 Cross-section lines AA and BB are drawn at two positions on shaft 3.
  • the associated cuts are in figure 7 to the right of the knitting machine needle 1 and show the unreduced shank cross section 22 and the reduction of the shank cross section 21.
  • the sections show the first butt 5 and the first transition point 28 as well as the second transition point 29.
  • FIG 8 shows a section through a channel of the needle bed 16 of a knitting system 15 according to the invention.
  • the cutting line is in the width direction y immediately in front of the side wall of the needle 1 (and parallel to the same).
  • the knitting system 15 is similar to those in the references DE3311361A1 and DE102014118217A1 knitting systems shown, the representation is not to scale and essential for the knitting process Components - such as other knitting tools (mainly sinkers) - have been left out.
  • the sinkers guide the knitting needle 1 in its width direction y in the areas that come in front of the channel walls 17 in the longitudinal direction z of the needles 1 .
  • the plate adjacent to the needle 1 would 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 .
  • the knitting machine needle 1 is supported by the channel base 32 of the needle bed 16 in the vertical direction x.
  • the knitting machine needle 1 is guided by two channel walls 17 in the width direction y.
  • In the representation of figure 8 only one channel wall 17 of the needle bed 16 is shown, which guides the knitting machine needle 1 in the width direction y in its rear area, in which the butt 5 is also located (the sinkers, which do this in the front area, have been omitted, as mentioned).
  • the butt 5 of the knitting machine needle 1 engages in the cam part 18 shown in section.
  • the knitting machine needle 1 In the front area 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 vertical direction x in its illustrated position in the needle bed 16.
  • the situation shown arises with knitting systems 15 according to the invention at least when the knitting machine needle 1 is driven out to the maximum during knitting operation.
  • a predetermined breakage is particularly likely in an exit position of the needle 1 in which the needle bed 16 or other knitting machine parts no longer provide a support function for the predetermined breaking section 9 or at least large parts of the hook-side part of the needle in front of it. This applies all the more since in the load position shown by a force F, a predetermined breakage due to the front part of the needle 1 with the hook 2 “buckling away” is very likely.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Claims (14)

  1. Aiguille de machine à tricoter (1), qui comprend au moins les caractéristiques suivantes :
    - un crochet (2) pour former des mailles, qui délimite la tige (3) dans la direction longitudinale (z) de la tige (3) et qui se termine par une pointe de crochet (4),
    - une première section d'entraînement (33) qui suit le crochet (2) dans la direction longitudinale (z) de la tige (3),
    caractérisée par
    - une section de rupture privilégiée (9) pour séparer le crochet (2) de la première section d'entraînement (33),
    qui est formée par une section de la tige (3) qui s'étend dans la direction longitudinale (z),
    et qui se trouve entièrement dans une première section de tige (10) qui s'étend dans la direction longitudinale (z) de la tige (3) entre la pointe (4) du crochet (2) et la première section d'entraînement (33).
  2. Aiguille de machine à tricoter (1) selon la revendication 1,
    caractérisée par
    une section de rupture privilégiée (9),
    - qui se rompt lors d'une application d'une force qui agit sur le crochet (2) et qui est inférieure à 80 % de la force,
    - à laquelle une aiguille de machine à tricoter de construction identique sans section de rupture privilégiée (9) est déformée de manière permanente.
  3. Aiguille de machine à tricoter (1) selon la revendication 1 ou 2,
    caractérisée par
    une languette (6), qui est articulée de manière rotative sur la tige (3) de telle sorte que, dans sa position de fermeture (7), elle ferme l'espace intérieur du crochet (2) et que la pointe de la languette (6), dans sa position de réserve (8), est dirigée vers la section d'entraînement (33) dans la direction longitudinale (z) de la tige (3).
  4. Aiguille de machine à tricoter (1) selon la revendication 3,
    caractérisée en ce que
    - la section de rupture privilégiée (9) se trouve entièrement dans une deuxième section de tige (11),
    - la deuxième section de tige (11) s'étendant dans la direction longitudinale de la tige (z) entre la position de la pointe de languette (12) dans la position de réserve de la languette (6) et le début côté crochet (19) de la première section d'entraînement (33) .
  5. Aiguille de machine à tricoter (1) selon la revendication 3,
    caractérisée en ce que
    la section de rupture privilégiée (9) se trouve entièrement dans une troisième section de tige (13),
    - qui commence dans la direction longitudinale (z) de l'aiguille de machine à tricoter (1) à l'emplacement qui, en direction de la première section d'entraînement (33), est espacé de deux longueurs de languette du point d'articulation (14) de la languette (6)
    - et qui se termine dans la direction longitudinale (z) de l'aiguille de machine à tricoter (1) à l'emplacement qui, dans la direction de la première section d'entraînement (33), est espacé de trois longueurs de languette du point d'articulation (14) de la languette (6),
    - la longueur de languette étant la distance entre le point d'articulation (14) de la languette et la pointe de languette (12).
  6. Aiguille de machine à tricoter (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le début côté crochet (19) de la première section d'entraînement (33) présente une distance d'au moins 75 mm dans la direction longitudinale (z) par rapport au début côté crochet (20) de l'aiguille (1) dans la direction longitudinale (z) de la tige (3).
  7. Aiguille de machine à tricoter (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la section d'entraînement (33) est formée par un pied (5), qui dépasse de la tige (3) dans la direction verticale positive (x) de la tige (3).
  8. Aiguille de machine à tricoter (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la section de rupture privilégiée (9) comprend une réduction (21) de la section transversale de la tige perpendiculairement à la direction longitudinale (z).
  9. Aiguille de machine à tricoter (1) selon la revendication précédente,
    caractérisée en ce que
    la section de rupture privilégiée (9) comprend une réduction (21) de la section transversale de la tige (22) par une réduction de la dimension de la tige dans la direction verticale (x).
  10. Aiguille de machine à tricoter (1) selon la revendication 9,
    caractérisée par
    une section de rupture privilégiée (9) qui, à son emplacement ayant la plus grande réduction (21) de la section transversale de la tige (22), comprend une réduction de la dimension de la tige dans la direction verticale (x) d'au minimum 10 % et d'au maximum 50 %.
  11. Aiguille de machine à tricoter (1) selon l'une quelconque des revendications 9 à 10,
    caractérisée en ce que
    la réduction de la dimension de la tige dans la direction verticale (x) présente une allure qui, dans le plan qui est défini par la direction verticale (x) et la direction longitudinale (z), présente une forme triangulaire ou trapézoïdale (26), dont les flancs latéraux (25) ont entre eux un angle d'ouverture de 60° à 120°.
  12. Aiguille de machine à tricoter (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la section de rupture privilégiée (9) comprend au moins partiellement un matériau d'allongement à la rupture plus faible que les sections (10, 11, 13) du reste de la tige (3) et notamment que les zones (23, 24) de la tige (3) voisines de la section de rupture privilégiée (9) .
  13. Système de tricotage (15), comprenant au moins les caractéristiques suivantes :
    - une fonture (16) dotée de moyens de guidage (17) et d'au moins un fond de canal (32), qui sont conçus pour recevoir des aiguilles de machine à tricoter (1) et pour les soutenir et les guider lors de leur mouvement intermittent dans leur direction longitudinale (z),
    - au moins une partie de verrouillage (18) pour transmettre une force à au moins une première section d'entraînement (33) d'une aiguille de machine à tricoter (1) reçue dans la fonture (16),
    - un nombre d'aiguilles de machine à tricoter (1), au moins une des aiguilles de machine à tricoter (1) étant réalisée selon la revendication 1.
  14. Système de tricotage (15) selon la revendication 13,
    caractérisé en ce que
    les moyens de guidage (17) et l'au moins un fond de canal (32) de la fonture (16), l'au moins une partie de verrouillage (18) ainsi que la position de la première section d'entraînement (33) et de la section de rupture privilégiée (9) sur l'au moins une aiguille de machine à tricoter (1) sont accordés de telle sorte,
    - que l'au moins une aiguille de machine à tricoter (1) est, en mode de tricotage, au moins temporairement expulsée des moyens de guidage (17) et de l'au moins un fond de canal (32) dans une mesure telle
    - que les moyens de guidage (17) et l'au moins un fond de canal (32) ne soutiennent plus, au moins partiellement, la section de rupture privilégiée (9) de l'au moins une aiguille de machine à tricoter (1).
EP19154755.3A 2019-01-31 2019-01-31 Aiguille du métier à tricoter et système de tricotage Active EP3690095B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
PT191547553T PT3690095T (pt) 2019-01-31 2019-01-31 Agulha de máquina de tricotar e sistema de tricotagem
EP19154755.3A EP3690095B1 (fr) 2019-01-31 2019-01-31 Aiguille du métier à tricoter et système de tricotage
TW108142710A TWI859169B (zh) 2019-01-31 2019-11-25 針織機織針及針織系統
PCT/EP2020/051356 WO2020156875A1 (fr) 2019-01-31 2020-01-21 Aiguille pour machine à tricoter et système de tricotage
JP2021523400A JP2022519143A (ja) 2019-01-31 2020-01-21 編み機用針及び編み物システム
CN202080011906.7A CN113574218B (zh) 2019-01-31 2020-01-21 针织机针和针织系统
BR112021005119-8A BR112021005119B1 (pt) 2019-01-31 2020-01-21 Agulha de máquina de tricotar e sistema de tricotagem
KR1020217014301A KR20210122223A (ko) 2019-01-31 2020-01-21 편직기 바늘 및 편직 시스템
ARP200100179A AR117875A1 (es) 2019-01-31 2020-01-24 Aguja de máquina de tejer y sistema de tejido

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19154755.3A EP3690095B1 (fr) 2019-01-31 2019-01-31 Aiguille du métier à tricoter et système de tricotage

Publications (2)

Publication Number Publication Date
EP3690095A1 EP3690095A1 (fr) 2020-08-05
EP3690095B1 true EP3690095B1 (fr) 2022-05-18

Family

ID=65275993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19154755.3A Active EP3690095B1 (fr) 2019-01-31 2019-01-31 Aiguille du métier à tricoter et système de tricotage

Country Status (8)

Country Link
EP (1) EP3690095B1 (fr)
JP (1) JP2022519143A (fr)
KR (1) KR20210122223A (fr)
CN (1) CN113574218B (fr)
AR (1) AR117875A1 (fr)
BR (1) BR112021005119B1 (fr)
PT (1) PT3690095T (fr)
WO (1) WO2020156875A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4411043A1 (fr) * 2023-02-02 2024-08-07 Groz-Beckert KG Pièce d'insertion d'une machine textile, emballage pour au moins une pièce d'insertion, procédé d'alimentation d'une machine textile avec au moins une pièce d'insertion et système de traitement ultérieur de matériaux textiles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311361A1 (de) * 1983-03-29 1984-10-04 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt Strickmaschine zur herstellung von maschenware

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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
FR1491758A (fr) * 1966-09-02 1967-08-11 Lebocey & Cie Georges Aiguille pour machines de tricotage ainsi que les machines et notamment les machines à vitesse rapide pourvues desdites aiguilles
JPH0213512Y2 (fr) 1986-05-21 1990-04-13
DE4320956C2 (de) 1993-06-24 1997-12-11 Johannes Prof Dr Rer N Gartzen Verfahren zur Herstellung einer Sollbruchstelle an einer Maschinennadel sowie eine nach dem Verfahren hergestellte Maschinennadel
DE19503048C2 (de) 1995-02-01 1999-09-23 Groz Beckert Kg Nadel, insbesondere für Großstickmaschinen
CN2534208Y (zh) 2002-01-25 2003-02-05 萧世贤 一种带有折纹的织针
US6629438B1 (en) 2002-11-26 2003-10-07 Groz-Beckert Kg Needle set
DE10333172B4 (de) * 2003-07-22 2006-01-19 Groz-Beckert Kg Strickmaschinennadel
JP2010013787A (ja) * 2008-06-03 2010-01-21 Tokyo Metropolitan Industrial Technology Research Institute 編針及びその製造方法
PT2540889T (pt) * 2010-07-06 2016-09-19 Groz Beckert Kg Sistema de tricotagem com canais de guiamento achatados
EP2927360B1 (fr) * 2014-04-03 2017-03-08 Groz-Beckert KG Outil à tricot pour machines à tricoter
DE102014118217B4 (de) 2014-12-09 2020-12-31 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Rundstrickmaschine

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3311361A1 (de) * 1983-03-29 1984-10-04 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt Strickmaschine zur herstellung von maschenware

Also Published As

Publication number Publication date
KR20210122223A (ko) 2021-10-08
WO2020156875A1 (fr) 2020-08-06
BR112021005119B1 (pt) 2023-05-02
BR112021005119A2 (pt) 2021-06-15
CN113574218A (zh) 2021-10-29
PT3690095T (pt) 2022-06-27
AR117875A1 (es) 2021-09-01
JP2022519143A (ja) 2022-03-22
CN113574218B (zh) 2023-07-04
TW202045789A (zh) 2020-12-16
EP3690095A1 (fr) 2020-08-05

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