EP2385161A1 - Doigt à fils pour un dispositif de changement de fil - Google Patents

Doigt à fils pour un dispositif de changement de fil Download PDF

Info

Publication number
EP2385161A1
EP2385161A1 EP11003308A EP11003308A EP2385161A1 EP 2385161 A1 EP2385161 A1 EP 2385161A1 EP 11003308 A EP11003308 A EP 11003308A EP 11003308 A EP11003308 A EP 11003308A EP 2385161 A1 EP2385161 A1 EP 2385161A1
Authority
EP
European Patent Office
Prior art keywords
thread
finger
finger body
cutting blade
clamping element
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
EP11003308A
Other languages
German (de)
English (en)
Other versions
EP2385161B1 (fr
Inventor
Hans König
Bernd Boss
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.)
Sipra Patententwicklungs und Beteiligungs GmbH
Original Assignee
Sipra Patententwicklungs und Beteiligungs GmbH
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 Sipra Patententwicklungs und Beteiligungs GmbH filed Critical Sipra Patententwicklungs und Beteiligungs GmbH
Publication of EP2385161A1 publication Critical patent/EP2385161A1/fr
Application granted granted Critical
Publication of EP2385161B1 publication Critical patent/EP2385161B1/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

Definitions

  • the invention relates to a yarn finger for a yarn changing device of a knitting machine with an elongated finger body, one end of which is attached to a pivot lever and the other end has a thread receiving portion for a knitting yarn, and with a longitudinally displaceable along the finger body guide element, with a cutting blade and a resiliently biased clamping element along the finger body are displaceable.
  • Such a yarn finger is from the yarn changing device of DE 195 11 949 B4 known.
  • To move the cutting blade and the clamping member on a running through the thread receiving area knitting yarn is arranged around the finger body of the known yarn finger a hollow, box-shaped guide body which receives the finger body with sliding fit and in which also the cutting blade and the spring-loaded clamping element are arranged so that they are displaceable along with the guide body along the finger body.
  • the known yarn finger on a relatively large width, whereby a yarn changing device having a plurality of such parallel arranged yarn fingers, a large installation space on the knitting machine needed.
  • This disadvantage is particularly noticeable in stripers, which have to process up to six different knitting threads alternately.
  • a separate thread finger is provided in the thread changing device. Due to the relatively wide yarn fingers according to the prior art, a further increase in workable knitting yarns and thus ring colors is hardly possible.
  • the concomitant broadening of the yarn changing device would require a reduction of the usable on the machine knitting systems, which is economically unreasonable due to the associated increase in the knitting time.
  • the present invention is therefore based on the object to provide a yarn finger for thread changing devices, which can be produced with a smaller width than the yarn fingers according to the prior art.
  • the object is achieved with a yarn finger of the type mentioned according to the invention that the finger body has at least one longitudinal slot in which the guide element is slidably mounted.
  • the guide element no longer surrounds the finger body, but is guided within it.
  • Thread changing devices with such Thread fingers are equipped, have the same number of thread fingers a smaller width than the thread changing devices according to the prior art, or it can be recorded in the thread changing devices with the same width more thread fingers than before.
  • the guide element is designed as a flat profile part, wherein its thickness may correspond to the width of the at least one longitudinal slot throughout.
  • At least the guide element, the cutting blade and the clamping element are not in front of the sides of the finger body which laterally border the at least one longitudinal slot.
  • the width of the entire yarn finger is then determined by the width of the finger body, which need not be greater than the width of the finger body according to the prior art.
  • the cutting blade and the clamping element can be arranged in a conventional manner on opposite sides of the finger body. However, it is also possible to arrange the clamping element and the cutting blade on the same side of the finger body. They can be held by the guide element in abutment against the guide body and be movable parallel to this. In their forward movement by means of the guide element, they can thereby fulfill their functions safely.
  • the severing of the knitting thread by the cutting blade in cooperation with the preferably designed as a cutting edge outer boundary of the thread receiving portion of the finger body and the clamping support of the resulting by cutting the thread end between the clamping element and the finger body must be almost simultaneously.
  • the guide element can press the clamping element by means of a spring against the finger body.
  • the spring may be a separate element or a resilient portion of the clamping element itself.
  • two longitudinal slots are provided in the finger body, which passes through the guide element with two projections, wherein at least one of the projections is also guided through slot-shaped openings in the cutting blade and in the clamping element.
  • the guide element can clamp the clamping element between itself and the finger body and fix the cutting blade on the opposite side of the finger body. Since the projection of the guide element penetrates both the cutting blade and the clamping element, these are entrained in the movement of the guide member in the longitudinal slots of the finger body. It is particularly advantageous if the guide element engages through the cutting blade and the clamping element with one of its projections and the pointing away from the thread receiving portion of the finger body ends of the cutting blade and the clamping element are attached to the second projection.
  • the cutting blade and the clamping element are fixed in a parallel alignment with the finger body and are not present at the same time over the second projection of the guide element.
  • the guide element with the cutting blade and the clamping element passes through two projections and thereby fixed in parallel alignment with the finger body.
  • the spring can preferably be designed as a leaf spring and held taut between the two projections of the guide element. For the spring element, this results in a favorable three-point support. In this way, the clamping effect of the clamping element can be realized in a cheap and easy to install manner.
  • this may be provided on the opposite side of the projections with an actuating foot on which it is to be moved by means of an actuating element of the yarn changing device at least in the direction of the thread receiving portion of the finger body. At this foot, it can for example be acted upon by a closer of the yarn changing device.
  • one of the projections of the guide element may be designed such that it can be acted upon by an actuating element of the thread changing device, at least in a direction away from the thread receiving area.
  • an opener of the thread changing device can act on this projection.
  • the finger body, the cutting blade, the clamping element and the guide element, but preferably also the pivot lever and the spring are produced as stamped sheet metal parts.
  • the production of the individual parts of the thread finger is characterized very cost-effective.
  • the elements have a minimal material thickness, which makes it possible to produce particularly slim thread fingers.
  • the invention also relates to a yarn changing device for a knitting machine, which is characterized in that it comprises a plurality of mutually parallel thread fingers arranged according to the invention, and a knitting machine with at least one such thread changing device.
  • the in Fig. 1 shown thread finger 10 has a finger body 11, which at its front end a thread receiving portion 12 in the form of a substantially U-shaped recess, in particular also from Fig. 2b is apparent.
  • the front boundary of the recess 12 is formed as a cutting edge 13.
  • the rear end of the finger body 11 is attached to a pivot lever 14 which has a bore 15 for receiving a pivot axis of a yarn changing device not shown here.
  • it is provided with an actuating foot 16 for triggering the pivoting movement.
  • longitudinal slots 17, 18 are introduced, of which the longitudinal slot 18 also in Fig. 1 can be seen.
  • a guide member 19 is inserted, wherein this passes through the longitudinal slots 17, 18 with two projections 20, 21.
  • a clamping element 24 is arranged between the guide member 19 and the finger body 11.
  • a cutting blade 22 is arranged, which is pressed by a spring element 25 against the finger body 11.
  • Both the cutting blade 22 and the clamping element 24 and the spring 25 are secured with their rear ends on the projection 21.
  • the projection 20 of the guide member 19 passes through a slot-shaped opening 26 of the cutting blade 22 (FIG. Fig. 6b ) and a slot-shaped opening 27 of the clamping element 24 (FIG. Fig. 5b ). That's how it works Guiding element 19, when it is acted upon by an actuating foot 28 towards the front end of a closing element of the yarn changing device, not shown here, at the same time the cutting blade 22 and the clamping element 24 to the thread receiving portion 12 and then beyond the cutting edge 13 addition.
  • the individual parts of the yarn finger 10 are flat profiled parts, which are preferably produced as sheet metal stampings.
  • the width of the entire yarn finger 10 corresponds to the width of the finger body 11 (FIG. Fig. 2b ).
  • the thread finger 10 has a decidedly slim design.
  • the individual parts of the yarn finger 10 can be easily replaced.
  • the cutting blade 22 can be easily removed for resharpening.
  • a yarn finger with a guided inside the finger body 11 guide member 19 allows significantly greater manufacturing tolerances than the yarn fingers with box-shaped, the finger body 11 enclosing guide elements according to the prior art.
  • Fig. 2a, 2b show the finger body 11 with the thread receiving portion 12, the cutting edge 13 and the two longitudinal slots 17 and 18, the leadership of in Fig. 3 serve guide element 19 shown in detail. At the same time they limit the displacement of the guide member 19 and thus also the cutting blade 22 and the clamping member 24 along the finger body 11.
  • Wie Fig. 2b shows, the finger body 11 at its rear end a notch 29 which receives the pivot lever 14 clamped when the finger body 11 is inserted into a designated guide groove 30 in the pivot lever 14, such as Fig. 4 shows.
  • pivot lever 14 is provided with a nose 31 which engages in the longitudinal slot 18 of the finger body when it is attached to the pivot lever 14. The finger body 11 is then held clamped between the outer boundary 32 of the guide groove 30 and the nose 31 in the pivot lever 14.
  • the detailed representation of the guide element 19 in Fig. 3 illustrates that the two projections 20, 21 between parallel portions 33, 34, the cutting blade 22 and the clamping member 24 can clamped.
  • a notch 35 can be seen in the projection 20 into which the front end 36 (FIG. Fig. 7a ) of the spring 25 can be used.
  • the projection 21 is made longer than the projection 20, so that it can be acted upon by an opener of the thread changing device.
  • the detailed representation of the clamping element 24 in the Fig. 5a, 5b illustrates that this element has at its rear end a notch 37, with which the clamping element 24 is supported on the portion 34 of the projection 21 of the guide member 19 and thus protected against lateral displacement.
  • Fig. 6a, 6b the cutting blade 22 is shown in more detail, which has a very similar to the clamping element 24 structure, at its tip, however, is provided with a cutting edge 38 which can cooperate with the cutting edge 13 of the finger body 11 to sever a knitting thread.
  • the spring element 25 which is a leaf spring element and also as sheet metal stamping with arranged at both ends notches 39, 40 can be produced, such as Fig. 7c shows.
  • the planar guide element according to Fig. 7c is bent so that it in Fig. 7a Form shown receives.
  • the spring element 25 pulls on the projections 20, 21 on the opposite side of the finger body 11, the guide element 19 and thus also the clamping element 24 against the finger body 11 and thereby generates its clamping action.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
EP11003308.1A 2010-05-03 2011-04-20 Doigt à fils pour un dispositif de changement de fil Active EP2385161B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010019032 DE102010019032A1 (de) 2010-05-03 2010-05-03 Fadenfinger für eine Fadenwechselvorrichtung

Publications (2)

Publication Number Publication Date
EP2385161A1 true EP2385161A1 (fr) 2011-11-09
EP2385161B1 EP2385161B1 (fr) 2017-12-20

Family

ID=44358077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11003308.1A Active EP2385161B1 (fr) 2010-05-03 2011-04-20 Doigt à fils pour un dispositif de changement de fil

Country Status (6)

Country Link
EP (1) EP2385161B1 (fr)
JP (1) JP5946607B2 (fr)
CN (1) CN102234872B (fr)
DE (1) DE102010019032A1 (fr)
ES (1) ES2662954T3 (fr)
TW (1) TWI588312B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101505601B1 (ko) 2013-07-05 2015-03-26 양진석 색사전환장치의 실 절단장치
CN104831460B (zh) * 2015-04-15 2017-05-17 归继东 一种针织圆机的自动调线喂纱装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063371A1 (fr) * 1981-04-16 1982-10-27 Aktiebolaget Iro Machine à tricoter pour la production de tricot à rayures transversales
WO2000073564A1 (fr) * 1999-05-26 2000-12-07 Mec-Mor S.R.L. Selecteur de fils pour metiers a tricoter et analogues
DE19511949B4 (de) 1995-03-31 2009-10-15 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Strickmaschine und Fadenwechselvorrichtung
US7690224B1 (en) * 2008-12-29 2010-04-06 Pai Lung Machinery Mill Co., Ltd. Yarn changing set for color altering heads

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53126346A (en) * 1977-04-07 1978-11-04 Mitsuyoshi Mori Method of and device for pattern stitching weft knitting machine and device for braking resting needles
CN100547138C (zh) * 2005-10-31 2009-10-07 佰龙机械厂股份有限公司 圆形针织机的变色装置
ITMI20061877A1 (it) * 2006-09-29 2008-03-30 Santoni Spa Dispositivo per l'alimentazione dei fili per macchine per maglieria,particolarmente per macchine circolari per maglieria
JP2008297662A (ja) * 2007-05-31 2008-12-11 Matsuzaki Matorikusu Techno:Kk 丸編機における給糸切替装置
CN201232109Y (zh) * 2008-06-03 2009-05-06 洪荣豪 变换纱线装置夹切纱的连动机构
CN101298721B (zh) * 2008-06-18 2010-08-04 冯发泉 自动调线器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063371A1 (fr) * 1981-04-16 1982-10-27 Aktiebolaget Iro Machine à tricoter pour la production de tricot à rayures transversales
DE19511949B4 (de) 1995-03-31 2009-10-15 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Strickmaschine und Fadenwechselvorrichtung
WO2000073564A1 (fr) * 1999-05-26 2000-12-07 Mec-Mor S.R.L. Selecteur de fils pour metiers a tricoter et analogues
US7690224B1 (en) * 2008-12-29 2010-04-06 Pai Lung Machinery Mill Co., Ltd. Yarn changing set for color altering heads

Also Published As

Publication number Publication date
TW201139771A (en) 2011-11-16
DE102010019032A1 (de) 2011-11-03
ES2662954T3 (es) 2018-04-10
TWI588312B (zh) 2017-06-21
CN102234872A (zh) 2011-11-09
JP2011236545A (ja) 2011-11-24
JP5946607B2 (ja) 2016-07-06
EP2385161B1 (fr) 2017-12-20
CN102234872B (zh) 2015-01-21

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