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EP2009160A1 - Aiguille coupante dotée d'une lame réglable - Google Patents

Aiguille coupante dotée d'une lame réglable Download PDF

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Publication number
EP2009160A1
EP2009160A1 EP07012443A EP07012443A EP2009160A1 EP 2009160 A1 EP2009160 A1 EP 2009160A1 EP 07012443 A EP07012443 A EP 07012443A EP 07012443 A EP07012443 A EP 07012443A EP 2009160 A1 EP2009160 A1 EP 2009160A1
Authority
EP
European Patent Office
Prior art keywords
knife
needle
slot
cutting
projection
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
Application number
EP07012443A
Other languages
German (de)
English (en)
Other versions
EP2009160B1 (fr
Inventor
Günther Büchle
Eric Jürgens
Jörg Sauter
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 EP07012443.3A priority Critical patent/EP2009160B1/fr
Priority to KR1020080059469A priority patent/KR101036758B1/ko
Priority to JP2008165807A priority patent/JP5116579B2/ja
Priority to CN2008101293273A priority patent/CN101333728B/zh
Priority to US12/146,970 priority patent/US7533547B2/en
Publication of EP2009160A1 publication Critical patent/EP2009160A1/fr
Application granted granted Critical
Publication of EP2009160B1 publication Critical patent/EP2009160B1/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
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/60—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices
    • 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
    • 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
    • D04B35/34—Devices for cutting knitted fabrics

Definitions

  • cutting needles are made using cutting needles having a needle body with a hook provided at one end and a blade portion formed adjacent to the hook.
  • the knife portion has a sharpened cutting edge, which serves for slicing stitches. If the knife section is dulled by prolonged use, the quality of the knitwear suffers. The cutting needle must then be replaced.
  • the cutting needle according to the invention has a needle body and a knife, which is detachably connected to the needle body.
  • the blade can be replaced when worn and replaced by a new sharpened knife. It is also possible to remove a worn knife from the cutting needle and sharpen separately.
  • the cutting needle can remain in the knitting machine, when the knife is to be replaced. It is not necessary to open the knitting machine lock. This greatly facilitates the maintenance of the knitting machine with truncated cutting edges of the cutting needles.
  • a seat for receiving and supporting the knife is provided on the cutting needle.
  • This seat may for example be in the form of a slot extending through the needle body.
  • the slot is preferably located in the needle body longitudinal direction adjacent to the hook. Between the slot flanks the knife is held. It sits in the slot, preferably with very little lateral play, so that it is precisely captured.
  • the slot is preferably arranged centrally in the needle body. It is then bounded laterally by webs or slot walls.
  • the slot walls are part of the needle body and preferably formed parallelflankig.
  • the slot width and the cross section of the slot walls can be approximately the same size. They are preferably each one third of the needle thickness in the slot area. Depending on the field of application, however, the thickness ratios can vary.
  • the slot width will be greater than one third of the needle thickness in the slot area.
  • the slot width can take up half of the needle thickness, in some cases even larger.
  • the slot width can be very small; only 20% of the needle thickness in the slot area or even less.
  • the knife socket formed by the slot preferably contains at least one form-locking holding means for supporting the knife.
  • This form-locking holding means is engaged with the knife to store it at least at one of its ends or in an area near the end.
  • the Positive locking means is for example a projecting into the slot first projection which is received by a recess of the knife.
  • the recess may be in the form of an opening which adjoins both flat sides of the knife and thus passes through the knife, or be formed on the front side, the hook-facing end of the knife.
  • These positive locking means may form a pivoting hinge, which supports the knife at its front, hook-side end.
  • a moment supporting surface for the knife can be provided on the needle body. This is preferably arranged on the distal end of the form-locking holding means of the slot. It serves to absorb and support a pressure force exerted by the thread, in particular when the cutting edge gradually blunts, on the knife.
  • the moment supporting surface is preferably a preferably flat surface extending in the longitudinal direction of the needle body. This surface is preferably oriented approximately radially to the pivot axis formed by the above-mentioned hinge means.
  • a releasable connection means For releasable connection of the knife with the needle body can serve a releasable connection means.
  • This may be formed by a latching device which is arranged at a location which is spaced from the positive-locking holding means.
  • the latching device may be formed, for example, by a latching tongue formed on the blade, which can engage in a latching manner with a second projection provided in the slot.
  • the latching tongue is preferably oriented transversely to the needle body longitudinal direction. Based on the defined by the positive connection means pivot axis, the latching tongue is preferably oriented in the circumferential direction.
  • the latching tongue is in turn preferably one-piece component of the knife. This can be achieved by providing the knife with slot-like recesses, between which a tongue formed from the material of the knife stops. This is preferably provided at its free end with a detent recess which can engage the needle body.
  • the releasable connection means for example in the form of a latching device may be formed at the same location as the holding means, it then forms the holding means.
  • the latching device may for example be formed by a survey that protrudes into an opening of the knife and thus holds this by means of positive locking and fixed.
  • the survey may be in the form of a pin formed from the material of a slot wall.
  • the size and dimension of the opening of the cutting blade and the survey of the slot wall can be coordinated so that the cutting blade is axially fixed in the slot of the needle body after assembly.
  • a second latching device of the same or a similar type can be arranged at a distance from the first.
  • one of these two latching means is arranged in the front end region of the cutting blade and the other holding or latching means in the rear end region of the cutting blade.
  • To fix the cutting blade can serve two surveys per opening in the cutting blade. Each elevation starts from a slot wall and projects into the opening of the cutting blade. Both elevations can be mirror-symmetrical and can be exactly opposite each other.
  • an opening can take a shape that deviates from the shape of a survey. Thus, an opening may be formed, for example, as a slot.
  • the elevations of the two slot walls can then preferably be arranged laterally offset, so that a survey in the rear region of the elongated hole projects and the opposite elevation protrudes in the front region of the elongated hole.
  • the height of the surveys can be made very small. If two elevations protrude into an opening, then the sum may be the height of both elevations be smaller than the width of the cutting blade or the length of an opening. Between the two surveys which protrude into an opening is then preferably a distance.
  • the elevations may be formed in a variety of forms, they may for example have a cylindrical, or a spherical or otherwise curved shape.
  • an effective between the knife and the needle body Axialarret réelles founded is provided.
  • the Axialarret réelles realized may be formed by positively cooperating means which are effective between the knife and the needle body.
  • the Axialarret réelles sexual contains at least one contact surface for the knife, said contact surface is directed against axial movement of the knife on the latching device towards. That
  • the abutment surface of the axial locking device provided on the needle base body preferably faces the positive connection means.
  • a contact surface may for example be formed on a web provided in the slot, which is arranged between the latching device and the positive connection means.
  • Alternative axial locking means may be provided which act, for example, on an end face of the knife.
  • the present invention allows a simple and quick change of worn blades and thus a considerably accelerated Maintenance of knitting machines.
  • the present invention enables the separate production of knives and needle bodies from different, each optimized for the purpose of materials with different optimized for each target production technologies. It is also possible to provide needle body and knife separately and in different numbers, so that it can be successively used on a needle body several knives and worn.
  • FIG. 1 a cutting needle 1 is illustrated, which has an elongate base body 2, at the end of a hook 3 is formed.
  • the main body 2 is configured to communicate with a drive device. He can do that as well FIG. 2 shows, be provided at a suitable remote from the hook 3 place with a foot 4.
  • This is adapted to cooperate with the needle lock of a knitting machine, whereby the needle body 2 in the needle channel of a needle bed, such as a dial or a knitting cylinder, ie axially in the longitudinal direction L is moved.
  • the example in rectangular cross-section needle body 2 has, as FIG. 1 illustrates, adjacent to the hook 3, a slot 5 in which a knife 6 is held.
  • the slot 5 preferably starts in the immediate vicinity of the hook 3 in a throat region 7 and extends beyond the needle breast 8. It is straight and is bounded by two slot flanks. As FIG. 3 shows the slot 5 goes from the needle top 9 to the needle back 10 and thus forms an opening. The slot 5 is thus open both to the needle top 9 and to the needle back 10. It is noted, however, that the slot 5 may be closed to the needle back 10 as needed.
  • the slot 5 serves to support and secure the blade 6, which can be designed as a razor blade as a flat flat plate. It thus has two facing away from each other flat sides, which are held between the slot flanks without significant play. At its rising from the throat 7 edge is ground, so that there, as shown, straight or if necessary, otherwise shaped cutting edge 11 is formed. This is preferably at an acute angle to the shaft longitudinal direction L.
  • the knife 6 and the needle body 2 of the cutting needle 1 are preferably made separately and subsequently joined together. Accordingly, they can consist of different materials, for example different steels.
  • the material of the knife 6 is optimized so that the wear of the cutting edge 11 in the intended use is minimal.
  • the material of the needle body 2 can be optimized in terms of toughness or other properties.
  • both the knife 6 and the needle body 2 can be provided with optimized wear-reducing coatings of different types.
  • the holding means 12 is formed, for example, by a first projection 14 formed on the end 13 of the slot 5 in conjunction with a notch 15 provided in the associated end of the knife 6.
  • the first projection 14 may be formed between end surfaces of the slot 5, each of which is followed by a circular arc.
  • the positive-locking means 12 forms a kind of hinge, a in FIGS. 3 and 4 defines perpendicular to the plane of the drawing and thus oriented transversely to the main body longitudinal direction L hinge axis. This allows the knife 6 in the slot 5 in and out of this clearlyschwenken how FIG. 4 indicated by a dot-dashed circular arc 16.
  • a preferably flat torque support surface 17 is formed on the needle base body 2, which serves as a support surface for a correspondingly shaped support surface 18 of the blade 6 which is likewise planar in the present exemplary embodiment.
  • the moment support surface 17 is oriented approximately radially to the center of rotation of the holding means 12 and thus transversely to the circular arc 16. It supports the blade 6 when corresponding forces act on the cutting edge 11 when cutting threads, which then generate torques that press the knife 6 about the imaginary hinge axis of the positive holding means 12 in the direction of the circular arc 16 against the Momentenabstütz sympathy 17.
  • a fastening means is provided, which is formed by a latching device 19 in the present embodiment.
  • the latching device 19 comprises two latching engageable members, one of which is formed on the needle shaft 2 and the other on the blade 6.
  • these members are formed by the needle shaft 2 by a second projection 20 which is formed at the end 21 of the slot 5 away from the hook 3.
  • the locking member is formed by a tongue 22, which is an integral part of the knife 6.
  • the second projection 20 is limited in the present embodiment of two arcuate curved surfaces. It forms a projecting towards the hook 3 tip.
  • the tongue 22 is made of the material of the knife 6. It is separated by two slots 23, 24, ie cut out of the flat body of the knife 6 and thus forms an exposed elongated portion of the knife 6. At one end, it is seamless and seamless connected to the remaining material of the knife 6. Its other end is resiliently movable towards and away from the notch 15. This other resiliently movable end is also provided with a recess or notch 25 which is arranged to receive the tip of the second projection 20 can, when the support surface 18 rests against the torque support surface 17.
  • the cutting needle 1 may have an axial locking device 26 to which an abutment 27 formed on the base body 2 and a contact surface 28 formed on the blade 6 belong.
  • the abutment 27 may be formed by a web 5 passing through the web, which is integrally connected to both the slot 5 bounding cheeks.
  • the web or the abutment 27 preferably has a facet 29 oriented toward the hook 3. This is associated with the contact surface 28, which points away from the holding means 12 and the hook 3.
  • the contact surface 28 may be part of a boundary of a mouth-like opening 29 which is attached to the knife 6 at the edge 11 opposite the cutting edge.
  • FIG. 5 illustrates a modified embodiment in which the Axialarret ists worn 26 is not, as stated above, between the ends 13, 21 of the slot but seen from the perspective of the hook 3 behind the knife 6 is arranged.
  • This embodiment is suitable for example for cutting needles 1 'with a relatively high shaft, ie greater distance between the needle top 9 and the needle back 10.
  • the abutment 27 ' may be provided which cooperates with an end face 31 of the knife 6.
  • the end surface 31 thus forms a contact surface which corresponds to the contact surface 28.
  • the abutment 27 ' may be formed by a pin which is inserted into a corresponding, the needle body 2 transversely passing through opening.
  • the pin can also be formed by projections which project from the flanks of the slot extension 5 'toward one another.
  • Such half-pegs can be produced similar to the production of tongue bearings in latch needles.
  • FIG. 6 illustrates a modified embodiment of a cutting needle according to the invention 1.
  • This cutting needle has an Axialarret ists worn 26 ', a holding means 12' and a latching device 19 ', which differs from the means described above. Otherwise, reference is made to the above description when using the same reference numerals.
  • the holding means 12 ' is formed for example by a notch 15' in the form of an opening which is arranged transversely to the longitudinal direction L of the needle main body 2.
  • this opening 15 ' which is formed in the form of an oblong hole, projects from the slot wall 34, a first projection 14' and starting from the slot wall 35, a first projection 14 '' ( FIG. 7 ).
  • the slot 15 ' is limited in the direction of the hook 3 by an end 33 and opposite by an end 32.
  • the first projection 14 'and 14'' may be formed of the material of the slot wall 34, 35.
  • the first projections 14 'and 14 may be positioned spaced apart in the axial direction. In the embodiment according to FIG. 7 the first projection 14 'cooperates with the end 33 of the opening 15' and the first projection 14 "with the end 32 of the opening 15 'and form a positive connection with the ends 32 and 33.
  • the surface of the first projection 14' and 14 ' The height of the first projection 14 ', 14''may be small and thus only slightly projecting into the opening 15' of the knife 6.
  • the height and positioning of the first projection 14 ', 14'' is determined depending on the flexibility of the slot walls 34, 35. High flexibility of the slot walls 34, 35 allows a high height of the first projection 14', 14 '' and the positioning in a near-end region of the knife 6. Stable slot walls 34, 35 require a small height of the first Projection 14 ', 14''and the positioning as possible in the middle of the longitudinal extent of the knife. 6
  • the latching device 19 ' is spaced from the holding means 12 '. It is essentially the same as the holding means 12 'is formed. It has a notch 25 'in the form of a bore, which passes through the knife 6 transversely to its longitudinal direction. In this opening 25 'projects from the slot wall 34, a second projection 20''and starting from the slot wall 35, a projection 25''. Both projections 25 'and 25''are positioned the same in the axial direction. They face each other and form a positive connection with the opening 25 '. For the height and the position of the second projection 20 'and 20 ", the above-mentioned criteria of the first projection 14' and 14" apply accordingly.
  • the cutting needle 1 according to FIG. 6 an Axialarret ists worn 26 ', to which a formed on the base body 2 abutment 27' and formed on the knife 6 contact surface 28 'belong.
  • the abutment 27 ' may be formed by a slot 5 limiting surface or edge.
  • the edge or abutment 27 ' preferably has a facet 29' oriented toward the hook 3. This is associated with the contact surface 28 'which points away from the holding means 12' or the hook 3.
  • FIGS. 6 and 7 The knife 6 of a cutting needle 1 according to the invention FIGS. 6 and 7 is changed by using a means such as a pair of flat-nose pliers (not shown), the knife 6 detected on its flat sides and after: above in the direction of the needle top 9 is withdrawn.
  • the slot walls 34, 35 are resilient, so that the projections 14 ', 14''and20', 20 '' the openings 15 'and 25' share and the knife 6 can be removed.
  • a new knife 6 can be used in the free Slot 5 are introduced by being introduced from the needle top 9 in the direction of the needle back 10 with an aid, wherein the projections 14 ', 14'',20', 20 "with the openings 15 'and 25' form a snap closure.
  • a cutting needle 1 for knitting machines and similar applications which has a needle body 2, to which a knife 6, preferably by a latching device 19, 19 'is releasably held.
  • a cutting needle 1 reduces maintenance costs of knitting machines and opens up ways for the production engineering and material optimization of the needle body 2 and knife 6.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP07012443.3A 2007-06-26 2007-06-26 Aiguille coupante dotée d'une lame réglable Active EP2009160B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP07012443.3A EP2009160B1 (fr) 2007-06-26 2007-06-26 Aiguille coupante dotée d'une lame réglable
KR1020080059469A KR101036758B1 (ko) 2007-06-26 2008-06-24 교환 가능한 나이프를 구비한 절단 바늘
JP2008165807A JP5116579B2 (ja) 2007-06-26 2008-06-25 取り替え可能なナイフを備える切断針
CN2008101293273A CN101333728B (zh) 2007-06-26 2008-06-26 具有可更换刀的割针
US12/146,970 US7533547B2 (en) 2007-06-26 2008-06-26 Cutting needle with interchangeable knife

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07012443.3A EP2009160B1 (fr) 2007-06-26 2007-06-26 Aiguille coupante dotée d'une lame réglable

Publications (2)

Publication Number Publication Date
EP2009160A1 true EP2009160A1 (fr) 2008-12-31
EP2009160B1 EP2009160B1 (fr) 2016-09-28

Family

ID=39530161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07012443.3A Active EP2009160B1 (fr) 2007-06-26 2007-06-26 Aiguille coupante dotée d'une lame réglable

Country Status (5)

Country Link
US (1) US7533547B2 (fr)
EP (1) EP2009160B1 (fr)
JP (1) JP5116579B2 (fr)
KR (1) KR101036758B1 (fr)
CN (1) CN101333728B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8302089A (nl) 1983-06-13 1985-01-02 Doornes Transmissie Bv Traploos variabele overbrenging.
US9900609B2 (en) * 2013-01-04 2018-02-20 Nokia Technologies Oy Apparatus, a method and a computer program for video coding and decoding
CN204825367U (zh) * 2015-06-04 2015-12-02 连云港元丰机械制造有限公司 一种适用于割圈机的刀钩组合体
CN110042547B (zh) * 2019-04-22 2021-02-26 福建睿能科技股份有限公司 针织横机及其钩针

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1120989A (en) * 1913-06-19 1914-12-15 Louis N D Williams Knitting-machine needle.
DE2126522A1 (en) 1971-05-28 1972-12-14 Preda. Adolf Georg, 7863 Fahrnau Raschel knitting - single bed machine for plain and patterned plush
EP1710335A2 (fr) * 2005-04-06 2006-10-11 Groz-Beckert KG Aiguille de coupe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335075A (en) * 1941-04-04 1943-11-23 Needham William Knitting machine
US3040551A (en) * 1956-02-10 1962-06-26 George A Urlaub Stretch fabric and method
US4026126A (en) * 1974-12-07 1977-05-31 Otto Nuber Method of knitting knit plush fabric having a nap, or pile loops
US4089192A (en) * 1976-04-30 1978-05-16 Kohorn Alfred O Knitting machine needles with improved cut-off and spring location
US4537048A (en) * 1980-12-08 1985-08-27 Monarch Knitting Machinery Corp. Pile loop forming and cutting elements for circular knitting machines
DE19905668C2 (de) * 1999-02-11 2001-01-25 Groz Beckert Kg Umhängenadel zur Maschenübertragung
IT1307796B1 (it) * 1999-09-14 2001-11-19 Pinzauti Lucia Dispositivo e procedimento atto alla costruzione di tessuti a magliacon la formazione di pelo tagliato su maglia rovescia, i cui ranghi di
KR20030084297A (ko) * 2002-04-26 2003-11-01 채병각 초 장파일직물의 편성방법 및 그 장치
DE10227533C1 (de) 2002-06-20 2003-12-11 Groz Beckert Kg Nadel mit Umhängefeder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1120989A (en) * 1913-06-19 1914-12-15 Louis N D Williams Knitting-machine needle.
DE2126522A1 (en) 1971-05-28 1972-12-14 Preda. Adolf Georg, 7863 Fahrnau Raschel knitting - single bed machine for plain and patterned plush
EP1710335A2 (fr) * 2005-04-06 2006-10-11 Groz-Beckert KG Aiguille de coupe

Also Published As

Publication number Publication date
JP5116579B2 (ja) 2013-01-09
CN101333728B (zh) 2011-06-08
KR20080114548A (ko) 2008-12-31
EP2009160B1 (fr) 2016-09-28
CN101333728A (zh) 2008-12-31
US20090000338A1 (en) 2009-01-01
JP2009007733A (ja) 2009-01-15
KR101036758B1 (ko) 2011-05-25
US7533547B2 (en) 2009-05-19

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