EP2377979B1 - Apparatus and method for transferring loops from the knitting machine needle - Google Patents

Apparatus and method for transferring loops from the knitting machine needle Download PDF

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Publication number
EP2377979B1
EP2377979B1 EP11161131.5A EP11161131A EP2377979B1 EP 2377979 B1 EP2377979 B1 EP 2377979B1 EP 11161131 A EP11161131 A EP 11161131A EP 2377979 B1 EP2377979 B1 EP 2377979B1
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EP
European Patent Office
Prior art keywords
transfer
needle
strip
loop
reed
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Active
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EP11161131.5A
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German (de)
English (en)
French (fr)
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EP2377979A1 (en
Inventor
Mustafa Inli
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Da Kong Enterprise Co Ltd
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Da Kong Enterprise Co Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/40—Circular knitting machines with independently-movable needles with provision for transfer of knitted goods from one machine to another
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D04B1/102—Patterned fabrics or articles with stitch pattern
    • D04B1/108—Gussets, e.g. pouches or heel or toe portions
    • 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
    • D04B15/02—Loop-transfer points

Definitions

  • This invention relates to an apparatus and method for transferring loops from any kind of knitting machine needle, and particularly for use in the stocking machines with toe closure.
  • the toe parts of the stockings manufactured in stocking machines are generally formed in an open state by a first machine.
  • the toe parts of the stockings are manufactured in another machine.
  • Conventional stocking machines are circular knitting machines that typically have difficulty performing the toe closure process. Once the stocking has been knitted, the toe of the stocking must be stitched using another apparatus. In order to take the stocking from the stocking machine to an external machine for stitching, it is necessary to separately take and transfer the loops from the needles of the machine to the toe stitching apparatus.
  • This invention proposes an apparatus for taking and transferring the stockings loop by loop from the stocking knitting machines to the toe stitching apparatus.
  • the apparatus according to the invention is also capable of enabling the stocking taken from the knitting machine to be attached loop by loop on the toe stitching apparatus.
  • the needles placed into a plurality of channels opened on the outer longitudinal lateral surface of a cylindrical needle carrier move relative to the needle carrier along the direction of the needle axis.
  • the loop held by the hook located at the upper end of the needle passes through the preceding loop through the upward-downward movement along the needle axis, thereby forming the knots that constitute the knit.
  • the manufacture of the stocking in a stocking machine is carried out by knitting in sequential order the leg, heel, sole and toe, beginning from the ribbing.
  • the machine In order to take the stocking loop by loop from the stocking machine and to attach the same to the toe stitching apparatus for stitching the toe part of the stocking, the machine is stopped while the last loops of at the end of the toe of the stocking being knitted are attached to the hooks of the needles.
  • the transfer member takes the loop in a position between the needle hook and the latch, but it has to be adjusted very precisely. Even with the smallest maladjustment, it ladders the loop, thus causing the stocking to become defective.
  • the hook designed according to document no. EP2080827 enters the loop from the side of the needle, thereby taking the loop. Said hook collapses in the shape of a semicircle to perform the transfer to other needles.
  • US 5487281 A discloses an apparatus for joining two edges of a knitted tubular article, especially the toe of a stocking.
  • the apparatus comprises cam means for operating the lifting and respectively the lowering of a predetermined number of needles of a first and a second semirank of stitches.
  • the apparatus comprises means for removing the stitches from the first semirank and overturning them through 180 degree about a diametral axis of the cylinder of the needles.
  • Cam means for operating the 180 DEG overturning in both directions of the semicircular sector about said axis of the cylinder and means for operating the transfer of the sector from a knitting station to a linking station, that is a station in which the hook-up is formed, are provided.
  • the apparatus comprises means for keeping the sinkers housing of the machine at a fixed and predetermined angular position, a seamer-linker to operate the seaming of the pairs of stitches during the linking step, and means for ultimately cutting the linking thread and holding the end of the thread fed by a supply reel.
  • US 5586453 A discloses an apparatus for the removal of one or more stitches of a knit article from the needles of a knitting machine and for the transfer and placement thereof onto other knitting members of the same or other machine.
  • the apparatus includes a device for driving each of the needles forming the stitches in the direction of their respective longitudinal axis, a device for removal of the stitches from the needles and the transfer thereof onto other knitting members of the same or other machine, and a device for supporting and/or driving the device for the removal and transfer of the stitches.
  • the object of the present invention is to enable the toe sections of the stockings, manufactured in a stocking knitting machine with open toe sections, to be effectively transferred so that they may be stitched in another machine.
  • Said object is achieved by individually taking the toe loops from the knitting machine needles and individually attaching the same to the reed teeth of a stocking toe stitching apparatus.
  • said object is achieved by a device according to claim 1 and a method according to claim 10.
  • Knitting machines are circular type knitting machines and according to their general operating principle, the needles placed into a plurality of channels opening longitudinally on the outer surface of a cylindrical needle carrier move relative to the needle carrier along the direction of the needle axis.
  • the loop held by the hook located at the upper end of the needle passes through the preceding loop through the upward-downward movement along the needle axis, thereby forming the knots that constitute the knit.
  • the stocking is formed by knitting in sequential order the leg, heel, sole and toe, beginning from the ribbing. After the toe section has been knitted as the last step, the stocking is removed from the machine. However, the toe of the stocking remains non-stitched in this condition. The stockings leave the stocking machine (5) with the toe part left open, and the toes of the stockings are stitched later in a different machine.
  • a certain number of knitting machine needles are arranged along the circumference of the cylinder of the stocking machine. Although two such needles (3) arranged opposite one another have been illustrated in the description of the present invention, the transfer apparatus (100) according to this invention is applicable to all the remaining needles available in the cylinder, and the movement of all the needles in the cylinder may occur simultaneously.
  • the stocking machine (5) is stopped while the last loops, which belong to the stocking being knitted and having the ribbing, leg, heel and toe completed, are attached to the hooks of the needles.
  • the transfer apparatus (100) like the upper cylinder or the crimping apparatus located in the top part of the cylinder, is separated from the top section of the stocking machine (5) throughout the period during which the transfer is being completed, thereby permitting the stocking (4) to be taken from the machine (5).
  • Double-cylinder machines include an upper cylinder.
  • the part of the machine located in the top section must be separated from the machine (5) during the transfer. Once the transfer has been completed, the separated part returns to its position and continues manufacturing stockings.
  • a top side of the stocking machine (5) is opened to enable the transfer apparatus (100) that will carry out the transfer to assume its position on the machine (5).
  • the stocking's (4) last loops (41), which are circular and located at an upper open end of the stocking (4), are held in circular position by hooks (3b) of the needles (3).
  • hooks (3b) of the needles (3) are held in circular position by hooks (3b) of the needles (3).
  • the transfer apparatus (100) comprising a plurality of transfer members (1) and a plurality of strip members (2), is positioned on the stocking machine (5) whose top side has been opened.
  • the transfer members (1) which are circularly positioned on a transfer member bearing (28) (see Fig. 39 ) and the strip members (2) which are positioned on acircularstripmemberbearing (29) (see Fig. 40 ) are present in a quantity corresponding to the number of the needles (3) in the stocking machine (5).
  • the transfer member bearing (28) has radial channels (281) that are spaced annularly.
  • the transfer members (1) are disposed slidably and respectively in the radial channels (281).
  • the strip member bearing (29) has radial channels (291) that are spaced annularly.
  • the strip members (2) are disposed slidably and respectively in the radial channels (291).
  • Each of the transfer and strip members (1, 2) extends horizontally, and is movable axially upward and downward and radially towards and away from a respective needle (3) .
  • Each transfer member (1) is disposed horizontally above the strip member (2), and includes a radial shank portion (111), a front tip (1f) opposite the shank portion (111), and a tip region (112) extending inclinedly and downward from the shankportion (111) to the front tip (1f) and bending radially and thereafter axially and downward at the front tip (1f).
  • the front tip (1f) is hollow, and has a substantially inverted L-shape, a front side formed with a front opening (1e) (see Figs.
  • Each strip member (2) is capable of contacting the loop (41) formed on the hook (3b) of the respective needle (3) to push the loop (41) toward or away from the hook (3b).
  • Each of the transfer and strip members (1, 2) has an axially protruding tail (1a, 1b, 1c, 1d, 2a, 2b, 2c, 2d) extending upward from the respective shank (111, 121).
  • the tails (1a-1d, 2a-2d) are intended to enable the forward-backward movement of the transfer and strip members (1, 2) according to a radial orientation.
  • the forward-backward movement is provided by a cam mechanism (30).
  • the radial forward-backward (opening-closing) movements take place together simultaneously. For instance, as a transfer member (1) approaches the needle (3), all the other transfer members (1) will approach to the same extent.
  • each transfer member (1) is positioned exactly opposite each needle (3), each strip member (2) is positioned such that it corresponds to a midpoint between two needles (3).
  • the transfer members (1) and the strip members (2) are moved downward in the direction of arrows (12) and (22), respectively, over a certain distance such that the strip members (2) can contact the loops (41) on the respective needles (3) from above.
  • the strip members (2) then strip down the loops (41) from the respective hooks (3b) to such extent that the loops (41) will not drop off from the respective latches (3a).
  • the latches (3a) are completely opened, but the loops (41) have remained on the latches (3a). If the loops (41) are stripped down further, the latches (3a) will be emptied and some latches (3a) could be closed. In case the latches (3a) are closed, the transfer members (1) will not be able to assume its position inside the hooks (3b). Moreover, this condition will cause the fracture of the latches (3a) or of the transfer members (1).
  • each transfer member (1) is moved toward the respective needle (3) in the direction of an arrow (14) until the transfer member (1) reaches the hook (3b) and until the hook (3b) extends into the front opening (1e) in the tip region (112) of the transfer member (1).
  • This position is also shown in a perspective view in Fig. 32 .
  • the width of the front tip (1f) of each transfer member (1) has such a size and geometric form that enables the front tip (1f) to enter into and exit from the respective hook (3b) .
  • each strip member (2) has released the loop (41) from the respective latch (3a), it is then moved backward in the direction of an arrow (23) to come out of between the needles (3), and as shown in Fig. 7 , each strip member (2) is moved downward over some further distance in the direction of the arrow (22) below the respective loop (41). As shown in Fig. 8 , each strip member (2) is then moved close again in the direction of an arrow (24), and enters between the two needles (3) in such a way that it can contact and push the respective loop (41) from below. Then, as shown in Figs. 9 and 36 , each strip member (2) is moved upward in the direction of an arrow (21) to slide the loop (41) upward and toward the hook (3b) to enable each loop (41) to be transferred from the respective hook (3b) to the respective transfer member (1).
  • each transfer member (1) is moved backward in the direction of an arrow (13) to be released from the respective hook (3b).
  • the transfer members (1) and the strip members (2) are simultaneously moved upward in the direction of the arrows (11) and (21), respectively, and away from the needles (3) while each strip member (2) is still in contact with the respective loop (41) from below to stabilize each loop (41) on the respective transfer member (1).
  • the loops (41) of the stocking (4) are now completely taken by the transfer members (1) and the strip members (2) (see Fig. 11 ).
  • the loops (41) of the stocking (4) taken from the stocking machine (5) are carried to a circular toe stitching apparatus through the transfer and strip members (1, 2). That is, the strip and transfer members (2, 1) together with the respective loops (41) are moved until the transfer members (1) reach a reed of the stitching apparatus.
  • the reed of the stitching apparatus includes a semi-circular male reed section (25) having male reed teeth (6) arranged in a way to have gaps (19) in-between and in an amount to cover the circumference of a semi-circle, and a semi-circular female reed section (26) having female reed teeth (7) arranged in a way to have gaps (19) in-between, in an amount to cover the circumference of a semi-circle, and collapsible relative to the male reed section (25).
  • the reed teeth (6, 7) have as many as the number of the transfer members (1) arranged in a circular manner.
  • Each female reed tooth (7) is collapsible in the direction of an arrow (9) (see Fig. 17 ) and openable in the direction of an arrow (10) (see Fig. 22 ) relative to the male reed tooth (6).
  • Each reed tooth (6, 7) comprises an extension (6c, 7b) extending downward from a shank (61, 71) thereof.
  • the extension (6c, 7b) of each reed tooth (6, 7) enters the top opening (1g) (see Fig. 41 ) in the corresponding transfer member (1). This position is shown according to a perspective view in Fig. 41 .
  • each transfer member (1) is moved upward in the direction of the arrow (11) to some extent to release the front tip (1f) from the respective loop (41) of the stocking (4). In this way, each loop (41) can be transferred to the corresponding reed tooth (6, 7). Then, as shown in Fig. 15 , each transfer member (1) is moved backward in the direction of the arrow (13) to move away from the corresponding reed tooth (6, 7). Similarly, each strip member (2) is moved away from the corresponding reed tooth (6, 7) in the direction of the arrow (23). As a result, the loops (41) in a quantity corresponding to the number of the transfer members (1) are transferred to the corresponding reed teeth (6, 7) of the toe stitching apparatus.
  • a clearance required for collapsing of the female reed tooth (7) relative to the male reed tooth (6) is provided.
  • the female reed section (26) collapses relative to the male reed section (25) to align vertically and contact the female reed teeth (7) with the male reed teeth (6), respectively.
  • the transfer and strip members (1, 2) are moved upward in the direction of the arrows (11) and (12), respectively, until the left strip member (2) is aligned with the gap (19) (see Fig. 28 ) between two female reed teeth (7). Then, as shown in Fig. 19 , the left strip member (2) enters the gap (19) by moving forward in the direction of the arrow (24).
  • the tip of the transferring tooth is designed to have a preferably female form, while the receiving tooth is designed to have a preferably male form.
  • the tip (7a) of each female reed tooth (7) is formed with a groove, while the tip (6a) of each male reed tooth (6) is substantially wedge-shaped to mate with the groove.
  • Each male reed tooth (6) further has a reed tooth extension (6c) extending downward from the shank (61) thereof and having the tip (6a), and a channel (6b) (see Fig. 29 ) formed in an outer surface of the reed tooth extension (6c) and extending partially into the shank (61).
  • a needle (8) of a stitching machine which is currently waiting in a position above the toe stitching apparatus, moves downward in the direction of an arrow (15).
  • the needle (8) enters the channel (6b) in the direction of an arrow (27), and starts to stitch together the two loops (41).
  • the loops (41) present on all the reed teeth (6) are individually stitched in the direction of an arrow (16), thereby completing the stitching process for closing the open-end or toe section of the stocking (4) .
  • the stitching machine which is represented by the needle (8) in Fig. 24 , is moved upward in the direction of an arrow (17), and the transfer and strip members (1, 2) are also moved upward simultaneously.
  • the upward movement of the transfer and strip members (1, 2) are stopped when the left strip member (2) reaches a position in alignment with the gap (19) (see Fig. 28 ) between two male reed teeth (6), as shown in Fig. 24 .
  • the strip member (2) enters the gap (19) between the reed teeth (6).
  • the transfer and strip members (1, 2) are then moved downward to strip and move the stitch (18) of the toe of the stocking (4) away from the reed teeth (6).
  • the opening-closing (forward-backward) movement of the transfer and strip members (1, 2) are preferably actuated through a cam mechanism (30) shown in Fig. 43 .
  • the cam mechanism (30) has a plurality of cam rings (31, 32, 33, 34) of different diameters, which are disposed one around the other over the strip member bearing (28) and which are capable of performing circular rotation.
  • Each cam ring (31, 32, 33, 34) has a plurality of circularly arranged cams (311, 321, 331, 341) .
  • Another cam mechanism of similar structure as that of the cam mechanism (30) has cam rings (31, 32, 33, 34) disposed over the transfer member bearing (29).
  • each cam mechanism (30) is positioned on the respective bearing (28, 29) such that each cam (311, 321, 331, 341) is in contact with the corresponding tail (1a, 1b, 1c, 1d, 2a, 2b, 2c, 2d), when the cam mechanism (30) rotates to a certain extent, the transfer members (1) and the strip members (2) can simultaneously move radially forward/backward to the same extent.
  • the arrangement of the tails (1a, 1b, 1c, 1d) on the transfer members (6) is staggered.
  • the arrangement of the tails (2a, 2b, 2c, 2d) on the strip members (7) is also staggered.
  • the transfer member tails (1a, 1b, 1c, 1d) respectively engage channels (a, b, c, d) formed in the cams (31, 32, 33, 34) of the cam mechanism (30) and, likewise, the strip member tails (2a, 2b, 2c, 2d) respectively fit into channels (a, b, c, d) in the other cam mechanism.
  • this example simplifies the mechanism.
  • the number of such channels (a, b, c, d) in the cam mechanism (30) is the same as the number of the transfer members (1) or the number of the strip members (2).
  • tails (1a, 1b, 1c and 1d or 2a, 2b, 2c, 2d) could be less or more than four. Accordingly, the number of cams (311, 321, 331, 341) present in the cam mechanism (30) actuating the transfer members (1) and the strip members (2) will also vary.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Sewing Machines And Sewing (AREA)
EP11161131.5A 2010-04-06 2011-04-05 Apparatus and method for transferring loops from the knitting machine needle Active EP2377979B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR201002641 2010-04-06

Publications (2)

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EP2377979A1 EP2377979A1 (en) 2011-10-19
EP2377979B1 true EP2377979B1 (en) 2015-03-11

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EP (1) EP2377979B1 (zh)
ES (1) ES2534928T3 (zh)
PT (1) PT2377979E (zh)
TW (1) TWI448595B (zh)

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WO2016031282A1 (ja) * 2014-08-29 2016-03-03 永田精機株式会社 丸編機の編地縫合方法及び丸編機システム
SI3204544T1 (sl) * 2014-10-10 2019-05-31 Staubli Italia S.P.A. Postopek in naprava za pletenje cevastih pletenih izdelkov
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CN105887322B (zh) * 2015-12-07 2018-05-18 浙江海润精工机械有限公司 转移缝头
CN105887312B (zh) * 2015-12-07 2018-08-07 浙江海润精工机械有限公司 转移缝头
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ES2534928T3 (es) 2015-04-30
TWI448595B (zh) 2014-08-11
PT2377979E (pt) 2015-07-17
TW201144506A (en) 2011-12-16
EP2377979A1 (en) 2011-10-19

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