WO2013037654A2 - Double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial - Google Patents
Double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial Download PDFInfo
- Publication number
- WO2013037654A2 WO2013037654A2 PCT/EP2012/067096 EP2012067096W WO2013037654A2 WO 2013037654 A2 WO2013037654 A2 WO 2013037654A2 EP 2012067096 W EP2012067096 W EP 2012067096W WO 2013037654 A2 WO2013037654 A2 WO 2013037654A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dial
- machine
- axis
- needle cylinder
- supporting
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/06—Circular knitting machines with independently-movable needles with needle cylinder and dial for ribbed goods
- D04B9/065—Circular knitting machines with independently-movable needles with needle cylinder and dial for ribbed goods with stitch-length regulation
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/06—Circular knitting machines with independently-movable needles with needle cylinder and dial for ribbed goods
-
- 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
-
- 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
- D04B15/94—Driving-gear not otherwise provided for
Definitions
- the present invention relates to a double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial.
- double-bed circular knitting machines comprise a supporting structure that has a base for resting on the ground and supports, so that it can rotate about its own axis, which is oriented vertically, a needle cylinder and a dial that is arranged above and coaxially to the needle cylinder.
- the actuation of the needles with alternating motion along the slot in which they are accommodated is performed by means of the direct coupling of a heel of the needles with paths defined by cams that are connected to the supporting structure of the machine and face respectively the external lateral surface of the needle cylinder and the upper face of the dial, or indirectly by means of elements for actuating the needles that engage the cams and are connected to the needles.
- the minimum distance between the beds i.e., between the needle cylinder and the dial in the point of knitting formation, is a characteristic datum of the machine, which during the construction of the machine is adjusted with precision by the manufacturer, according to the gauge of the machine.
- This distance termed in the jargon “loop gap” can be modified manually by the user by means of an adapted device that can be controlled manually in order to obtain the desired type of knitting.
- the temperature variation generates a deformation of all the components of the beds that is not regular and uniform for each component, and this fact is the main cause of the unwanted variation of the loop gap value during the operation of the machine.
- the loop gap value increases as the temperature decreases, it may occur that when the knitting machine is left still or off for a few hours after having worked regularly, the temperature of the beds can drop to ambient temperature, causing an increase of the loop gap value of a few tenths of a millimeter. If the knitting machine is started and one begins to produce knitting without any remedy, the threads fed to the machine would break because they would be subjected to an excessive tension.
- the user corrects manually the tension of the threads by adjusting the feeding devices so as to be able to start the machine and then perform continuous adjustments of the tension of the threads until the operating temperature stabilizes.
- Another object of the invention is to provide a machine with a device capable of ensuring high precision in the adjustment of the distance between the two beds or loop gap.
- a further object of the invention is to provide a machine with a device that offers the greatest assurances of safety and reliability in use.
- Another object of the invention is to provide a machine with a device that does not preclude the possibility of manual intervention on the machine in order to vary the distance between the two beds to perform adjustment or maintenance interventions.
- a double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and dial comprising a supporting structure which supports, so that it can rotate about its own vertically oriented axis, a needle cylinder and a dial which is arranged above and coaxially to said needle cylinder, said needle cylinder having, on its lateral surface, a plurality of axial slots, each of which accommodates slidingly a needle that can be actuated with an alternating motion along the corresponding axial slot to form knitting and said dial having a plurality of radial slots, each of which accommodates slidingly a needle that can be actuated with alternating motion along the corresponding radial slot to form knitting, means being provided for feeding threads to said needles, characterized in that it comprises a device for correcting automatically the variations of the distance between the needle cylinder and the dial, comprising:
- an actuation and control element of the electronic type which is functionally connected to said tension detection means and is adapted to actuate said movement means in relation to the tension of the threads detected by said tension detection means.
- Figure 1 is a schematic view of a portion of the machine according to the invention, related to the needle cylinder and to the dial, shown in partial cross-section along a plane that passes through the axis of the needle cylinder and the dial;
- Figure 2 is an enlarged- scale view of a detail of Figure 1 ;
- Figure 3 is an enlarged- scale view of another detail of Figure 1 ;
- Figure 4 is an enlarged- scale view of a further detail of Figure 1 ;
- Figure 5 is a schematic sectional view of Figure 1 , taken along the line V-V.
- the machine according to the invention comprises, in a per se known manner, a supporting structure 2 which supports, so that it can rotate about its own vertically oriented axis 3, a needle cylinder 4 and a dial 5 which is arranged above and coaxially to the needle cylinder 4.
- the dial 5 has a plurality of radial slots 10, each of which accommodates a needle 11 that can be actuated with alternating motion along the corresponding radial slot 10 in order to form knitting.
- the actuation of the needles 11 arranged in the dial 5 is actuated by means of corresponding actuation cams 12 that face in an upward region the needles 11 and are connected to supporting elements 13 which are integral with the supporting structure 2 of the machine as regards the rotary motion of the dial 5, together with the needle cylinder 4, about the common axis 3, with respect to the supporting structure 2 of the machine.
- the needle cylinder 4 and the dial 5 can rotate about the common axis 3 with respect to the supporting structure 2 and the actuation cams 8, 12, which are connected to the supporting structure 2 of the machine.
- the machine is provided, again in a per se known manner, with means 14 for feeding threads 15 to the needles 7 arranged in the needle cylinder 4 and to the needles 11 arranged in the dial 5 in order to allow the needles 7, 11 to form knitting.
- the means 14 for feeding the threads 15 are constituted by per se known pulleys and guiding elements that define, for the threads 15, a path that runs from the corresponding spool to the needles 7, 11.
- the dial 5 is preferably supported, so that it can rotate about its own axis 3, by a central supporting element 20 that extends around the axis 3 of the dial 5 and rests on a substantially disk-shaped fixed supporting element 21, which is integral with the supporting structure 2 of the machine.
- the fixed supporting element 21 is extended around the central supporting element 20 and has, at the axis 3 of the needle cylinder 4 and of of the dial 5, a hole 23 that is crossed coaxially by the central supporting element 20.
- the movement means 18 are interposed between the fixed supporting element 21 and the central supporting element 20.
- the fixed supporting element 21 has, proximate to the rim of the hole 23 that is crossed by the central supporting element 20, a supporting ring 24 which is extended coaxially to the dial 5 and defines, with its upper face, a supporting surface that is substantially perpendicular to the axis 3 of the dial 5.
- the movement means 18 comprise bushes 26 which are accommodated in the supporting ring 24 and are oriented so that their axis is parallel to the axis 3 of the dial 5.
- the bushes 26 are coupled, by means of a coupling of the screw- and-nut type 27, to pivots 28 which are arranged so that their axes are parallel to the axis 3 of the dial 5 and are fixed to the central supporting element 20.
- Each bush 26, in fact, is crossed axially by a threaded hole 29 with which an externally threaded sleeve 30 mates.
- the sleeve 30 is fixed integrally around the pivot 28, which in turn is rigidly fixed to the flange 25 of the central supporting element 20.
- the movement means 18 comprise a gearmotor 33, the output shaft of which is connected to a pinion 34 that meshes with the ring gear 32 and can be actuated to cause, by means of the connection established by the ring gear 32, the simultaneous rotation of the gears 31, i.e., of the bushes 26 about the corresponding axes.
- the internal element 37 and the external element 36 are coaxial to the dial 5 and the internal element 37 supports, so that it can rotate about its own axis 3, a main shaft 38, by means of a pair of bearings 39.
- the main shaft 38 is connected coaxially, at its lower end, to the dial 5.
- the internal element 37 and the external element 36 are prevented from rotating about their own axis 3 with respect to the supporting structure 2.
- the internal element 37 cannot rotate with respect to the external element 36 about its own axis, which coincides with the axis 3 of the dial 5 and of the needle cylinder 4, because of the presence of a block 40 that is fixed to a portion of the lateral surface of the internal element 37 and engages, so that it can slide, an axial slot 41 that passes through a portion of the lateral surface of the external element 36.
- the internal element 37 is coupled, so that it can slide parallel to the axis 3, to the external element 36 and the relative sliding of these two elements is allowed by the sliding coupling of the block 40 inside the axial slot 41.
- the machine comprises means 43 for manually adjusting the position in terms of height of the dial 5 with respect to the needle cylinder 4.
- the manual adjustment means 43 comprise an actuation ring 44, which is arranged coaxially around the internal element 37 and rests on the upper end of the external element 36, with the interposition of balls 45 so as to be able to rotate about the axis 3 with respect to the external element 36.
- the actuation ring 44 is connected, by means of a coupling of the screw-and-nut type 46, to the internal element 37. More precisely, the actuation ring 44 is crossed axially by a threaded hole 47 that mates with a threaded portion 48 of the external lateral surface of the internal element 37 arranged at the upper end of the internal element 37 that protrudes from the upper end of the external element 36.
- the actuation ring 44 is manually rotatable to lift or lower the internal element 37, and therefore the dial 5, with respect to the external element 36 and therefore with respect to the needle cylinder 4.
- the actuation ring 44 is connected, by means of a chain or belt-type connection 49, to an actuation shaft 50, which is oriented so that its axis is parallel to the axis 3 of the dial 5 and is supported, so that it can rotate about its own axis, by the external element 36.
- a crank can be connected to the actuation shaft 50 to actuate the manual rotation of the actuation shaft 50, and therefore cause the rotation of the actuation ring 44, in order to perform adjustment or maintenance interventions on the dial 5 when the machine is stopped.
- the machine is provided with means 52 for detecting the temperature of the dial 5, and the temperature detection means 52 are functionally connected to the actuation and control element 19, in which movement values of the dial 5 with respect to the needle cylinder 4, obtained empirically during the setting of the machine and correlated to temperature values of the dial 5, are preset, so that the actuation and control element 19 can actuate the movement of the dial 5 with respect to the needle cylinder 4 in relation to the temperature of the dial 5 detected during the starting of the machine.
- the temperature of the dial 5 is monitored by way of the temperature detecting means 52, which transmit the detected temperature value to the actuation and control element 19, which on the basis of such temperature value, performs, by means of the actuation of the gearmotor 33, an approximate adjustment of the position of the dial 5 with respect to the needle cylinder 4 according to preset values, which are obtained by empirical tests performed with different temperatures of the dial 5 detected during the setup of the machine. This approximate adjustment is substituted by a more precise adjustment following the correct detection of the tension of the threads 15 performed by the load cells 35, which is indicatively reliable after one or two rotations of the needle cylinder 4 and of the dial 5.
- the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Details Of Garments (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280044660.9A CN103797168A (en) | 2011-09-15 | 2012-09-03 | Double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial |
BR112014005956A BR112014005956A2 (en) | 2011-09-15 | 2012-09-03 | double bed circular knitting machine with a device for automatically correcting variations in the distance between the needle roller and the dial |
US14/344,641 US20150027171A1 (en) | 2011-09-15 | 2012-09-03 | Double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial |
EP12753496.4A EP2756121A2 (en) | 2011-09-15 | 2012-09-03 | Double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2011A001657 | 2011-09-15 | ||
IT001657A ITMI20111657A1 (en) | 2011-09-15 | 2011-09-15 | CIRCULAR MACHINE FOR DOUBLE FRONT KNITWEAR WITH DEVICE FOR AUTOMATICALLY CORRECTING THE VARIATIONS OF THE DISTANCE BETWEEN THE NEEDLE AND PLATE CYLINDER. |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2013037654A2 true WO2013037654A2 (en) | 2013-03-21 |
WO2013037654A3 WO2013037654A3 (en) | 2013-05-30 |
Family
ID=44907952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/067096 WO2013037654A2 (en) | 2011-09-15 | 2012-09-03 | Double-bed circular knitting machine with device for correcting automatically variations of the distance between the needle cylinder and the dial |
Country Status (7)
Country | Link |
---|---|
US (1) | US20150027171A1 (en) |
EP (1) | EP2756121A2 (en) |
CN (1) | CN103797168A (en) |
BR (1) | BR112014005956A2 (en) |
IT (1) | ITMI20111657A1 (en) |
TW (1) | TW201311961A (en) |
WO (1) | WO2013037654A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115161864B (en) * | 2022-06-22 | 2023-12-22 | 绍兴宽裕机械股份有限公司 | Single-sided small circular knitting machine needle cylinder and processing technology |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2892392B2 (en) * | 1989-08-31 | 1999-05-17 | 株式会社福原精機製作所 | Automatic stitch adjustment apparatus and method for knitting machine |
US5224360A (en) * | 1989-11-12 | 1993-07-06 | Precision Fukuhara Works, Ltd. | Circular knitting machine having removable cylinder |
US5287709A (en) * | 1991-11-21 | 1994-02-22 | Nagata Seiki Kabushiki Kaisha | Stitch density adjusting device of circular knitting machine |
JPH07126965A (en) * | 1993-11-04 | 1995-05-16 | Fukuhara Seiki Seisakusho:Kk | Apparatus for automatically regulating extent of stitch in circular knitting machine and method therefor |
-
2011
- 2011-09-15 IT IT001657A patent/ITMI20111657A1/en unknown
-
2012
- 2012-09-03 EP EP12753496.4A patent/EP2756121A2/en not_active Withdrawn
- 2012-09-03 US US14/344,641 patent/US20150027171A1/en not_active Abandoned
- 2012-09-03 CN CN201280044660.9A patent/CN103797168A/en active Pending
- 2012-09-03 WO PCT/EP2012/067096 patent/WO2013037654A2/en active Application Filing
- 2012-09-03 BR BR112014005956A patent/BR112014005956A2/en not_active Application Discontinuation
- 2012-09-14 TW TW101133578A patent/TW201311961A/en unknown
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
WO2013037654A3 (en) | 2013-05-30 |
ITMI20111657A1 (en) | 2013-03-16 |
CN103797168A (en) | 2014-05-14 |
TW201311961A (en) | 2013-03-16 |
BR112014005956A2 (en) | 2017-04-04 |
US20150027171A1 (en) | 2015-01-29 |
EP2756121A2 (en) | 2014-07-23 |
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