EP2824227B1 - Dispositif de pincement et de coupe pour une machine à tricoter rectiligne - Google Patents

Dispositif de pincement et de coupe pour une machine à tricoter rectiligne Download PDF

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Publication number
EP2824227B1
EP2824227B1 EP14176213.8A EP14176213A EP2824227B1 EP 2824227 B1 EP2824227 B1 EP 2824227B1 EP 14176213 A EP14176213 A EP 14176213A EP 2824227 B1 EP2824227 B1 EP 2824227B1
Authority
EP
European Patent Office
Prior art keywords
activation
bars
lever
activation bars
hooks
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
EP14176213.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2824227A1 (fr
Inventor
Michel Prost
David Keiffer
François CHARNAVEL
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.)
Steiger Participations SA
Original Assignee
Steiger Participations SA
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 Steiger Participations SA filed Critical Steiger Participations SA
Publication of EP2824227A1 publication Critical patent/EP2824227A1/fr
Application granted granted Critical
Publication of EP2824227B1 publication Critical patent/EP2824227B1/fr
Active legal-status Critical Current
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    • 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
    • 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
    • D04B15/56—Thread guides for flat-bed knitting machines
    • D04B15/565—Associated thread-clamping or thread-severing devices
    • 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
    • D04B15/10—Needle beds

Definitions

  • the invention relates to the field of straight knitting machines.
  • the invention relates to a device for pinching and cutting knit yarns.
  • the invention also relates to a straight knitting machine comprising such a device.
  • the knitting yarns are distributed to the needles of the needle beds by means of wire guides.
  • wire guides When knitting yarns, it is often necessary to pinch and cut the knitting yarns.
  • KR 1020050014665 and of EP2354285 a device for pinching and cutting yarns for a straight knitting machine. This device is activated by means of the carriage which moves above the needle beds. However, the need to use the carriage to activate this device generates many constraints that significantly reduce the productivity of the knitting machine.
  • a first object of the invention is to provide a device for pinching and cutting yarns for a straight knitting machine that can seize or pinch son and cut son.
  • a second object of the invention is to provide a device for pinching and cutting yarns for a straight knitting machine which does not require, for its activation, the use of the carriage which traditionally moves above the needle beds of the machine. .
  • a third object of the invention is to provide a clamping and cutting device in which each hook of the device can be actuated individually and independently of the others.
  • a fourth object of the invention is to provide a clamping and cutting device for a straight knitting machine that is inexpensive to manufacture.
  • a fifth object of the invention is to provide a clamping and cutting device for a straight knitting machine that is not bulky, in particular that does not clutter the space between the needle beds of the machine.
  • a sixth object of the invention is to provide a clamping and cutting device that is adjustable so that it can be resized as needed.
  • a pinch and wire cutting device for a straight knitting machine, said machine comprising at least one needle bed on which are disposed a plurality of needles, said device comprising a plurality of hooks adapted to gripping at least one wire and moving between a resting position and a pinching and cutting position, said device being shaped to be attached to one end of said needle bed so that said device, when attached at the needle bed of the machine, extends in the bedding plane, said device comprising activation means for moving the hooks of said device independently of one another, and which does not require, for its activation, the use of the carriage which moves above the needle beds of the machine, said activation means being kinematically connected to drive means comprising at least one motor.
  • the clamping device and cutting described above in that it can be attached in the extension of the bed or beds of a flat knitting machine, does not encumber the space between the beds of the machine. It also allows to move a plurality of hooks independently of each other.
  • said drive means may consist of a first electric motor and a second electric motor.
  • the clamping and cutting device according to the invention can therefore be limited to the use of two electric motors only. The production costs of such a device are, therefore, minimized.
  • said activation means may comprise connecting means, a first set of activation bars and a second set of activation bars, said connecting means being shaped and arranged so as to kinematically bind said means with said first set of activation bars and with said second set of activation bars.
  • said connecting means may be shaped and arranged so as to be able to simultaneously move all the activation bars of said first set and simultaneously move all the activation bars of said second set.
  • the drive means may be shaped and arranged so as to be able to drive the activation bars of said first set independently of the activation bars of said second set.
  • said connecting means may comprise a first axis provided with at least one first gear wheel.
  • said connecting means may comprise a second axis provided with at least one second gear wheel.
  • the first gear wheel can mesh a rack of an activation bar of said first set.
  • the second gear wheel can mesh a rack of an activation bar of said second set.
  • each of the activation bars of said first set may be provided with a lever arranged so that said lever can move between an active position and an inactive position.
  • said lever may be provided with a first pin.
  • said lever may be provided with a second stud.
  • each of the activation bars of said second set may comprise a cam path extending over at least a part of its length.
  • said cam path may comprise at least one protuberance.
  • each of said hooks may comprise a notch.
  • said device may comprise detection means for determining the position of the hooks of the device.
  • a straight knitting machine according to the invention comprises at least one device as described above.
  • FIG. 1 On the figure 1 is represented a bed 1 of a straight knitting machine.
  • a conventional pinching and cutting device 2 which serves to pinch certain son during the implementation of a knitting process.
  • this device 2 is actuated by the carriage (not shown) which moves above the needle beds of the machine during the implementation of the knitting process.
  • a clamping and cutting device 3 At the other end of the needle bed, on the left in the figure, is fixed a clamping and cutting device 3 according to the invention.
  • the clamping and cutting device 3 according to the invention when the clamping and cutting device 3 according to the invention is attached to the needle bed 1 of the knitting machine, the latter is in the plane of the needle bed.
  • the clamping and cutting device 3 according to the invention can be attached to any end of the needle bed 2 and on any bedding of a straight knitting machine.
  • the clamping and cutting device according to the invention does not encumber the space between the needle beds of the machine. So even though figure 1 is limited, for the sake of clarity, to present a single bed, it is understood that the skilled person will understand that the clamping device and cutter 3 according to the invention can be used in a straight knitting machine including more a needle bed.
  • FIGS. 2A and 2B represent, respectively, a top view and a bottom view, the clamping and cutting device 3 according to the invention.
  • the device 3 comprises two electric motors 4 and 5 which make it possible to actuate, as will be described below, the hooks 6 of the device. It should be noted at this stage that, considering that only two electric motors are necessary, the device 3 according to the invention is therefore inexpensive to manufacture.
  • Figures 2A and 2B and the above description mention the presence of two motors 4 and 5. Alternatively, however, we can imagine the use of a single motor with two output shafts and means to develop these two trees independently of the one of the other.
  • the device 3 comprises a plurality of hooks 6 which are able to move between a rest position ( Fig. 7A ) and a gripping position ( Fig. 7C ), wherein said hooks are able to grasp a wire brought by a thread guide of the knitting machine and to pinch it so that it can then be cut.
  • the number of hooks present in the device as shown on the Figures 2A and 2B is sixteen. Alternatively a more or less large number of hooks can be envisaged and the clamping and cutting device can therefore be dimensioned as needed to include a larger or smaller number of hooks 6.
  • the device further comprises housings 7 allowing to protect from dust the activation mechanism inside the device 3.
  • the figure 3 is a perspective view from below of the clamping and cutting device 3 according to the invention when the protective housings 7 have been removed.
  • the output gear 8 of the motor 4 meshes with a toothed wheel 9 of a first axis 10, which will be called “lever axis”.
  • the output gear 11 of the motor 5 meshes with a toothed wheel 12 of a second axis 13, which will be called the “selector axis”.
  • the rotation of the shaft of a motor induces the rotation of the axis to which it is linked.
  • the first axis 10, the lever axis, and the second axis 13, the selector axis, are provided with a plurality of toothed wheels 14 which, as will be seen below, each mesh with an activation bar 15 provided, over at least a portion of its length, a rack.
  • the number of toothed wheels 14 corresponds to the number of hooks 6 of the device 3 and the number of activation bars 15 thus corresponds to twice the number of hooks of the device.
  • the Figure 4B represents a detailed view of the part 16 of the clamping and cutting device 3 according to the invention indicated on the Figure 4A .
  • the device actually comprises a first set of activation bars 150 and a second set of activation bars 151.
  • the activation bars of the first set 150 make it possible to interact directly with the brackets 6 to move them.
  • the second set of activation bars 151 allows it, as will be explained below, to select one or the other of the hooks 6.
  • motors 4 and 5, axes 10 and 13 provided with gear wheels 14 meshing with the racks of the activation bars 150 and 151 is however only one possible embodiment. Indeed, it is alternatively possible to substitute the motors 4 and 5, the axes 10 and 13 and the gears 14 by other means for actuating the activation bars 150 and 151.
  • each activation bar is linked a linear motor, the latter allowing to move in translation the activation bar to which it is linked.
  • the Figure 5A is a perspective view of one of the activation bars of the first activation bar assembly 150.
  • Each activation bar of this assembly 150 is provided with a rack, extending over at least a portion of its length. and a lever 51, or selector, which is pivotable about an axis 52 between an inactive position (shown in the figure and indicated by the numeral 0) and an active position (indicated by the numeral 1).
  • the lever 51 is provided with a first slide pin 53, as will be described below, in a specific cam path 55 provided in the adjacent activation bar belonging to the second set of activation bars 151 (FIG. Fig. 5B ) which is activated by the selector shaft 13.
  • This cam path is provided with a protrusion 56 which, in contact with the stud 53, moves the lever from its inactive position to its active position.
  • the cam path may be provided with a plurality of protuberances.
  • each activation bar of the second set of activation bars 151 of the device has a different cam path since, for each activation bar of the second set of activation bars 151, the positioning protrusion 56 is different.
  • the lever 51 ( Fig. 5A ) is further provided with a second stud 54 intended to interact with a selection notch 61 of a hook (shown in FIG. Figure 5C ).
  • FIGS. 6A and 6B show, for one of the hooks of the device, the process for passing the hook from its pinching and cutting position, in which the hook is able to pinch a wire, to its gripping position, in which the hook is capable of grasping a thread brought by a thread guide.
  • the activation bar of the second set of activation bars 151 is moved back in the direction of the arrow A by a rotary movement of the selector shaft 13.
  • the lever is in the inactive position and the hook in the rest position.
  • FIG. 6B On the Figure 6B is shown the rest of the process when the activation bar of the second set of activation bars 151 is advanced towards the arrow B, following the rotation of the selector axis 13.
  • the figure shows in particular the moment when the pin 53 meets the protuberance 56 of the cam path.
  • the lever switches to the active position. This helps to bring the pin 54 of the lever into the selection notch 61 of the hook.
  • the hook 6 is thus selected and a synchronized movement of the activation bars of the first set of activation bars 150 and the second set of activation bars 151 induced, by the rotation of the axes 10 and 13 adapted, the movement of the hook. from its rest position to its gripping position.
  • FIGS. 7A-7E show the details of the method of selecting and deselecting one of the hooks of the clamping and cutting device 3 according to the invention. On each figure is shown a left view and a right view for better understanding.
  • FIG. 7D On the Figure 7D is shown the process for returning the hook from its gripping position to its rest position.
  • the axes 10 and 13 are actuated simultaneously in the opposite direction, so that the activation bar of the first set of activation bars 150 and the activation bar of the second set of activation bars 151 move in the direction of rotation. the arrow A.
  • the hook With the lever in the active position and the pin 54 remaining in the selection notch 61 of the hook 6, the hook therefore also moves in the direction of the arrow B. The hook thus passes from its gripping position to his rest position.
  • each hook is provided with at least one cutting edge 6 '. So, when a wire, previously brought by a wire guide, is grasped by a hook 6, a removal of the wire applied by the wire guide automatically induces the cutting of the wire by means of the cutting edge 6 '. Alternatively, when the wire is blocked by the wire guide and gripped by a hook, the passage of the hook from its gripping position to its rest position induces the cutting of the wire.
  • the device according to the invention is therefore capable of grasping or pinching a wire and cutting it.
  • the device further comprises detection means for determining at any time the position of the hooks and racks of the device.
  • detection means comprise at least one optical fiber and at least one optical sensor which are arranged at the level of the activation bars. These means make it possible, inter alia, to determine whether one of the levers 51 of the device is in the active position and whether the hooks are in the gripping position or in the inactive position.
  • detection means are connected and interact with hardware and software means of the straight knitting machine on which is fixed the clamping and cutting device according to the invention.
  • the detection means thus make it possible, following a power failure for example, to determine at the time of the current feed of the knitting machine what is the position of the hooks (gripping or rest) and what is the position of the levers (active or inactive) activation bars of the first set of activation bars 150 of the clamping and cutting device according to the invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
EP14176213.8A 2013-07-10 2014-07-08 Dispositif de pincement et de coupe pour une machine à tricoter rectiligne Active EP2824227B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1356772A FR3008432A1 (fr) 2013-07-10 2013-07-10 Dispositif de pincement et de coupe pour une machine a tricoter rectiligne

Publications (2)

Publication Number Publication Date
EP2824227A1 EP2824227A1 (fr) 2015-01-14
EP2824227B1 true EP2824227B1 (fr) 2019-01-02

Family

ID=49237410

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14176213.8A Active EP2824227B1 (fr) 2013-07-10 2014-07-08 Dispositif de pincement et de coupe pour une machine à tricoter rectiligne

Country Status (12)

Country Link
US (1) US20150013393A1 (enrdf_load_stackoverflow)
EP (1) EP2824227B1 (enrdf_load_stackoverflow)
JP (1) JP2015017355A (enrdf_load_stackoverflow)
KR (1) KR20150007239A (enrdf_load_stackoverflow)
CN (1) CN104278424B (enrdf_load_stackoverflow)
BR (1) BR102014017068A2 (enrdf_load_stackoverflow)
FR (1) FR3008432A1 (enrdf_load_stackoverflow)
IN (1) IN2014DE01860A (enrdf_load_stackoverflow)
MX (1) MX2014008450A (enrdf_load_stackoverflow)
RU (1) RU2014128148A (enrdf_load_stackoverflow)
SG (1) SG10201403821TA (enrdf_load_stackoverflow)
TW (1) TWI631255B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3601649A1 (en) 2017-03-31 2020-02-05 NIKE Innovate C.V. Plunger systems and multi-function feeders for a knitting machine
CN108360165B (zh) * 2018-01-09 2024-03-29 泉州市永祺塑胶电子有限公司 一种电脑横机的剪线机构及其剪线方法
CN108978017B (zh) * 2018-09-14 2020-05-15 汕头市澄海区瑞胜毛织有限公司 一种毛织物编织机切线装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354285A1 (en) * 2010-02-09 2011-08-10 Shima Seiki Mfg., Ltd Knitting yarn holding device for flatbed knitting machine

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JPH02269848A (ja) * 1989-04-08 1990-11-05 Shima Seiki Seisakusho:Kk 横編機における糸把持装置
JP2761926B2 (ja) * 1989-07-05 1998-06-04 株式会社福原精機製作所 丸編機における給糸切換装置
IT1251328B (it) * 1991-09-19 1995-05-08 Lonati Srl Gruppo di alimentazione del filo per macchine circolari per maglieria in particolare per macchine per calze a doppio cilindro
JPH07138854A (ja) * 1993-11-10 1995-05-30 Tsudakoma Corp 横編機の切断糸保持装置
DE19511949B4 (de) * 1995-03-31 2009-10-15 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Strickmaschine und Fadenwechselvorrichtung
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IT1312329B1 (it) * 1999-05-26 2002-04-15 Mecmor Spa Dispositivo per l'alimentazione selettiva dei fili in macchine permaglieria o simili.
JP2002302852A (ja) * 2001-04-09 2002-10-18 Matsutani Tekko:Kk 横編機における端糸の処理装置及びその処理方法
JP4015973B2 (ja) * 2003-07-30 2007-11-28 株式会社島精機製作所 編糸保持切断方法および装置
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Publication number Priority date Publication date Assignee Title
EP2354285A1 (en) * 2010-02-09 2011-08-10 Shima Seiki Mfg., Ltd Knitting yarn holding device for flatbed knitting machine

Also Published As

Publication number Publication date
FR3008432A1 (fr) 2015-01-16
RU2014128148A (ru) 2016-01-27
CN104278424A (zh) 2015-01-14
KR20150007239A (ko) 2015-01-20
HK1200883A1 (en) 2015-08-14
JP2015017355A (ja) 2015-01-29
IN2014DE01860A (enrdf_load_stackoverflow) 2015-06-19
US20150013393A1 (en) 2015-01-15
MX2014008450A (es) 2015-04-28
SG10201403821TA (en) 2015-02-27
EP2824227A1 (fr) 2015-01-14
TW201525218A (zh) 2015-07-01
BR102014017068A2 (pt) 2015-11-24
CN104278424B (zh) 2018-02-02
TWI631255B (zh) 2018-08-01

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