CN103572489B - Yarn feeding wheel improvement structure - Google Patents
Yarn feeding wheel improvement structure Download PDFInfo
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- CN103572489B CN103572489B CN201210280038.XA CN201210280038A CN103572489B CN 103572489 B CN103572489 B CN 103572489B CN 201210280038 A CN201210280038 A CN 201210280038A CN 103572489 B CN103572489 B CN 103572489B
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- yarn
- yarn feeding
- feeding wheel
- ceramics pole
- wheel
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Abstract
The present invention is relevant a kind of Yarn feeding wheel improvement structure, it is the stainless steel column and the alternate configuration of ceramics pole being compassingly set between upper and lower wheel cap at upper wheel cap, lower wheel cap and majority, the outer rim of ceramics pole is the most prominent, when sending yarn, the yarn of yarn storage section is around being located at yarn on ceramics pole, and because ceramics pole tool wear resistance is high, wear rate is relatively low, and it is difficult to scratch yam surface, new-type yarn texture is had and good send yarn effect.And set electric installation between wheel cap, lower wheel cap on this, the electrostatic that yarn and the friction of stainless steel column produce can be directed into support body ground connection through this electric installation, electrostatic can be eliminated.
Description
Technical field
The present invention is the structure about a kind of Yarn feeding wheel, a kind of improved structure of yarn feeding roller for circular knitting machine.
Background technology
The all first guide eye through guide arm of the guide of past irregular yarn-feeding is further around the cushion rubber surface in irregular guide again
Send (ginseng known before case), make yarn be sent by feed carrier and knitting machine the relation of relatively contending with of tension force of yarn demand to form institute
Yarn is sent in irregular (or jacquard weave) of meaning, therefore guide arm Oscillation Amplitude when sending yarn changes the most greatly and very frequent, i.e. send yarn to open
Power amplitude of variation is quite big, causes and send yarn unstable, the shortcoming becoming its blemish in an otherwise perfect thing, and uses the positive of metal bar yarn storage wheel
Though sending yarn tension stability, but can not use as irregular yarn-feeding, and under new-type yarn texture send yarn, yarn storage wheel metal bar
Wear rate is the most at a relatively high, and even after abrasion, the situation of metal burr scratch yam surface is also many, and therefore, irregular yarn-feeding is with fixed
Technology between amount active yarn transmission, its interest the most different, it is impossible to the technology with intercommunity can provide mutual conversion and pick length and mend short
Advantage.Furthermore, metal bar yarn storage wheel is when sending yarn, and yarn and metal bar friction can produce electrostatic, and cause yarn to tangle mutually,
Make to send the shortcomings such as yarn generation problem, to be improved.
Summary of the invention
Present invention is primarily targeted at offer a kind of Yarn feeding wheel improvement structure, when sending yarn, yarn in middle yarn storage section is
Around being located on ceramics pole, and the high wear resistance of mat ceramics pole, make ceramics pole wear rate reduce and the most easy to wear, and be less susceptible to scratch
Yam surface, to improve the Forming Quality of looped fabric, and can extend the person in service life of Yarn feeding wheel.
It is still another object of the present invention to provide a kind of Yarn feeding wheel improvement structure, when sending yarn, yarn grinds on stainless steel column
Wipe produced electrostatic, the guiding ground connection of conducting strip can eliminate electrostatic, make yarn will not mutually adsorb the person of being entangled with.
Another object of the present invention is to provide one is i.e. to break through conventional Yarn feeding wheel device irregular yarn-feeding tension force shakiness
Determine and need to often change the puzzlement of cushion rubber on Yarn feeding wheel, the advantage of irregular yarn-feeding is combined and the stability of active yarn transmission technology
Advantage and constitute and a kind of novel actively quantitatively send yarn and irregular (passive) variable to send the Yarn feeding wheel device of yarn, be allowed to work as and do not advise
Then (passive) send the Yarn feeding wheel device that yarn is dual-purpose with actively quantitatively sending yarn.
The present invention includes by the technological means reaching above-mentioned purpose and effect is taked: this Yarn feeding wheel is can by a central shaft
Being rotatably provided in the lower section of a support body, yarn post group is sent around being provided with one in this Yarn feeding wheel outside, and it is multiple that this send yarn post group to include
The stainless steel columns of number, and respectively alternate at least one ceramics pole that is provided with of this rustless steel intercolumniation, respectively this stainless steel column upper end be have to
The tilted guide section extending into this Yarn feeding wheel and pars intermedia slightly inwardly concave the yarn storage section of this Yarn feeding wheel, and this ceramics pole
Outer rim, the most outwardly in the yarn storage section of this stainless steel column, when sending yarn, by the guiding of this stainless steel column, makes yarn along guide
Section starts yarn again after the yarn storage section that downslide imports and is set around downwards on this ceramics pole.
This ceramics pole is for a hollow cylinder, and is provided with a metal bar in middle vacancy.
This ceramics pole is for a solid cylinder.
This ceramics pole is for fixing or rotary structure.
This Yarn feeding wheel has wheel cap and wheel cap once on one, and between this upper and lower wheel cap, sandwiched one has the conduction of electroconductive elastic sheet
Plate, this conductive plate periphery be provided with plural number arc-shaped slits in order to contact with this stainless steel column, this this electroconductive elastic sheet of conductive plate mat with this
Central shaft contacts, and makes a yarn and the produced electrostatic of this stainless steel column friction, and through this arc-shaped slits, this conductive plate, this leads
Electricity shell fragment and this central shaft are directed to this support body ground connection and eliminate electrostatic.
The present invention by another technological means reaching above-mentioned purpose and effect is taked is: a kind of Yarn feeding wheel improvement structure, should
Yarn feeding wheel has on one wheel cap and a wheel cap once, and this Yarn feeding wheel by a central shaft to be rotationally arranged under a support body
Side；Yarn post group is sent around being provided with one in this Yarn feeding wheel outside, and this send yarn post group to include some ceramics poles, on this wheel cap with this under
Arranging a stainless guide ware between wheel cap, this guide ware plugs together on this in slot of wheel cap, and this guide ware has lean-in
Tiltedly extending into a rake of this Yarn feeding wheel, this rake is offered plural number circular hole and is worn for this ceramics pole, when sending yarn, by
The guiding of this guide ware, makes yarn go out after starting to glide importing and be set around downwards this ceramics pole along this rake again
Yarn.
This ceramics pole is for a hollow cylinder, and is provided with a metal bar in middle vacancy.
This ceramics pole is for a solid cylinder.
This ceramics pole is for fixing or rotary structure.
The planar base of this guide ware sets one and has electroconductive elastic sheet, and this electroconductive elastic sheet is contacted with this central shaft, makes this yarn
Line and the produced electrostatic of this guide ware friction, be directed to this support body ground connection through this electroconductive elastic sheet, this central shaft and eliminate quiet
Electricity.
Owing to the design of the present invention utilizing the stainless steel column being compassingly set between the upper and lower wheel cap of Yarn feeding wheel and ceramics pole phase
Between configure, the yarn storage section outer rim at stainless steel column interlude slightly concaves relative to position compared with ceramics pole, and ceramic rod outer rim phase
To for more prominent structural improvement, when sending yarn, the yarn being positioned at yarn storage section is around being located at relatively on more prominent ceramics pole
And yarn, because ceramics pole tool wear resistance is high, wear rate is relatively low, and is difficult to scratch yam surface, to improve the molding matter of looped fabric
Amount, and can extend life-span of Yarn feeding wheel, has new-type yarn texture and good send yarn effect.
Furthermore, between upper wheel cap, lower wheel cap, it is provided with the electric installation of conductive plate and guide ware, can be by yarn and stainless steel column
The electrostatic that friction produces directs into support body ground connection through this electric installation, central shaft, and can eliminate electrostatic, makes to send yarn not stick.
Again because the slightly friction of ceramics pole, so the Yarn feeding wheel that can be used as irregular yarn-feeding uses, improve the most not
Rule send yarn to use the cushion rubber need to be in the disadvantage of 3-6 month regular replacing, therefore the Yarn feeding wheel of the present invention has concurrently and quantitatively send yarn and not
Rule send the structure of two kinds of features of yarn to be had no in the past.The technical content and a detailed description for the present invention, coordinate as follows
The embodiment explanation of accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of first embodiment of the invention；
Fig. 2 is the perspective exploded view of first embodiment of the invention；
Fig. 3 is the schematic cross section of the enforcement state of first embodiment of the invention；
Fig. 4 is the vertical section schematic diagram of the enforcement state of first embodiment of the invention；
Fig. 5 is vertical section and the earthenware generalized section of the enforcement state of first embodiment of the invention；
Fig. 6 is first embodiment of the invention yarn winding vertical section schematic diagram；
Fig. 7 is the upper end guide section yarn winding floor map of first embodiment of the invention；
Fig. 7 A is the upper end guide section yarn winding schematic cross section of first embodiment of the invention；
Fig. 8 is the middle yarn storage section yarn winding floor map of first embodiment of the invention；
Fig. 8 A is the schematic cross section of the middle yarn storage section winding yarn of first embodiment of the invention；
Fig. 9 is the installation configuration schematic perspective view of first embodiment of the invention；
Figure 10 is the installation configuration plane schematic diagram of first embodiment of the invention；
Figure 11 is vertical section and the ceramics pole generalized section of the enforcement state of second embodiment of the invention；
Figure 12 is the schematic perspective view of third embodiment of the invention；
Figure 13 is the perspective exploded view of third embodiment of the invention；
Figure 14 is the vertical section schematic diagram of the enforcement state of third embodiment of the invention；
Figure 15 is the upper end guide section yarn winding floor map of third embodiment of the invention.
Yarn feeding wheel 1,1A, 1B；Upper wheel cap 10；Groove 11；
Circle shrinkage pool 12,13；Slot 14；Lower wheel cap 20；
Circle shrinkage pool 21,22；Bead 23；Groove 231；
Protruded stigma 24；Conductive plate 30；Electroconductive elastic sheet 31；
Centre bore 32；Trepanning 33；Arc-shaped slits 34；
The wealthy mouth of arc 35；Guide ware 30A；Bead 31A；
Rake 32A；Circular hole 33A；Planar base 34A；
Electroconductive elastic sheet 35A；Centre bore 36A；Trepanning 37A；
Send yarn post group 40,40A, 40B；Stainless steel column 41；Guide section 411；
Yarn storage section 412；Ceramics pole 42,42A；Middle vacancy 421；
Metal bar 43；Central shaft 50；Screw rod 60；
Pad 61；Lining 70,80；Base 90；
Lug 91；Groove 92；Support body 100；
Belt pulley 101；Yarn W.
Detailed description of the invention
Please refer to Fig. 1 to Fig. 5, for the structurally improved first embodiment of Yarn feeding wheel provided by the present invention, wherein send
Yarn wheel 1 includes wheel cap 10 on, once wheel cap 20, conductive plate 30 and is compassingly set at periphery between upper and lower wheel cap 10,20
Send yarn post group 40.
Upper and lower wheel cap 10,20 by a central shaft 50 with screw rod 60 pass pad 61 and lining 70 sealed fixing and with
Central shaft 50 rotates, and the sheathed lining of groove 11 80 of upper wheel cap 10 is to prevent dust or cotton-wool entrance, the bottom of lower wheel cap 20
And have lug 91 and groove 92 base 90 coordinate button admittedly combine.
In the present embodiment, yarn post group 40 is sent to include the stainless steel column of complex root 41 different from complex root ceramics pole 42 two kinds
The cylinder of material, stainless steel column 41 is that the round shrinkage pool 12,21 of wheel cap 10 and lower wheel cap 20 on mat plugs together fixing, with as fence
It is centered around wheel cap 10 and the periphery of lower wheel cap 20.
Main improvement part is alternate between each stainless steel column 41 of Yarn feeding wheel 1 to be configured with at least one in the present embodiment
Ceramics pole 42, alternate between each stainless steel column 41 in the present embodiment is configured with two ceramics poles 42.
Ceramics pole 42 substantially has the cylinder of a thicker external diameter, and cylinder itself is in hollow straight-tube shape and in internal hollow
Place 421 is provided with a metal bar 43 and supports (as shown in Fig. 2, Fig. 5), and plug together upper wheel cap 10 and the round shrinkage pool 13 of lower wheel cap 20,
22, to be centered around upper wheel cap 10 and the periphery of lower wheel cap 20 in the lump as fence with stainless steel column 41.
Shown in ginseng Fig. 6, stainless its upper end of steel column 41 is a guide section 411, and guide section 411 tilts to extend into send yarn
In wheel 1, bootable yarn W imports Yarn feeding wheel 1 periphery according to its incline direction as shown in Fig. 7,7A.
Stainless its stage casing of steel column 41 is a yarn storage section 412 slightly inwardly concaving Yarn feeding wheel 1, and due to its external diameter of ceramics pole 42
More than stainless steel column 41, and the yarn storage section 412 in its outer rim more stainless steel column 41 stage casing is the most prominent, makes the outer rim of yarn storage section 412
The relatively relative position of ceramics pole 42 slightly concaves, thus the yarn W imported by guide section 411 will not in winding yarn storage section 412, but
It is set around as shown in Fig. 8,8A on the ceramics pole 42 of opposite exterior lateral sides.
Yarn W when Yarn feeding wheel 1 is inducted into yarn by stainless steel column 41 starts to glide along the guide section 411 tilted, with
Make yarn W be set around downwards on ceramics pole 42, and yarn W is around being located on ceramics pole 42, and with ceramics pole 42 material
High-wearing feature, less weares and teares, and is difficult to scratch yarn W surface, to improve the Forming Quality of looped fabric, and can extend Yarn feeding wheel 1
Life-span, new-type yarn texture is had and good send yarn effect.
Additionally, stainless steel column 41 bottom the most tiltedly goes out (or also the most tiltedly go out can), in order to guide to yarn path (in figure
Do not show).
As shown in Figure 9, Figure 10, Yarn feeding wheel 1 is the lower section being rotationally fixed to support body 100, and is coaxially fixed on
Belt pulley 101 on support body 100 is driven, to carry out sending yarn operation.
Another improvement part of the present embodiment is folded with a conductive plate 30, lower whorl between upper wheel cap 10 and lower wheel cap 20
The bead 23 of lid 20 sets a groove 231, makes the electroconductive elastic sheet 31 of conductive plate 30 accommodate and wherein can contact with central shaft 50.
Electroconductive elastic sheet 31 one end is connected at the limit of the centre bore 32 of conductive plate 30, and centre bore 32 and trepanning 33 in order to
Correspondence is inserted in bead 23 and the protruded stigma 24 of lower wheel cap 20.
Conductive plate 30 periphery sets a plurality of arc-shaped slits 34 and the wealthy mouth of arc 35, installs rear arc narrow orifice 34 and just contacts not
The yarn storage section 412 (as shown in Fig. 3, Fig. 4, Fig. 5) of rust steel column 41, makes to rub produced electrostatic because of yarn W and stainless steel column 41,
Support body 100 ground connection can be directed to via arc-shaped slits 34, conductive plate 30 body, electroconductive elastic sheet 31, central shaft 50, and can disappear
Destatic, make yarn W when sending yarn not reason Electrostatic Absorption phenomenon and make yarn tangle agglomerating person.
As shown in figure 11, for structurally improved second embodiment of Yarn feeding wheel provided by the present invention, the second embodiment is sent
Yarn wheel 1A primary clustering is identical with first embodiment, therefore also the description thereof will be omitted to be marked with same-sign.
Yarn post group 40A of sending of Yarn feeding wheel 1A includes complex root ceramics pole 42A and stainless 41 two kinds of unlike materials of steel column
Cylinder, ceramics pole 42A is for solid ceramics cylinder and to plug together the round shrinkage pool 12,22 at upper wheel cap 10 and lower wheel cap 20 equally,
To obtain the effect person identical with first embodiment.
Ceramics pole 42 in first embodiment and the ceramics pole 42A in the second embodiment can be set as fixing or rotatable person.
As shown in Figure 12 to Figure 15, for structurally improved 3rd embodiment of Yarn feeding wheel provided by the present invention, the 3rd implements
In example, Yarn feeding wheel 1B primary clustering and first and second embodiment are identical, therefore also the description thereof will be omitted to be marked with same-sign, Yarn feeding wheel 1B's
Send yarn post group 40B only to include complex root ceramics pole 42A, and replace in first and second embodiment with a rustless steel guide ware 30A
Conductive plate 30.
The improvement part of the present embodiment is to be centered around wheel cap 10 and lower whorl as fence with identical ceramics pole 42A
The periphery of lid 20, and stainless guide ware 30A is set between upper wheel cap 10 and lower wheel cap 20.
Ceramics pole 42A is that the round shrinkage pool 12,22 of wheel cap 10 and lower wheel cap 20 on mat plugs together and is fixed on wheel cap 10 and lower whorl
Between lid 20.
Bead 31A of guide ware 30A plugs together in the slot 14 of upper wheel cap 10, and guide ware 30A sets rake 32A and tilts to prolong
Stretch in Yarn feeding wheel 1B, there is guiding yarn W and import Yarn feeding wheel 1B periphery according to its incline direction as shown in Figure 15.
This guide ware 30A offers most circular hole 33A in its rake 32A and wears for ceramics pole 42A, and guide ware 30A
Planar base 34A set a centre bore 36A with electroconductive elastic sheet 35A, and trepanning 37A be inserted in lower wheel cap 20 bead 23 and
Protruded stigma 24.
The electroconductive elastic sheet 35A of guide ware 30A can be contained in equally and can contact with central shaft 50 in groove 231.
When sending yarn, the winding of yarn W by rustless steel guide ware 30A rake 32A be inducted into yarn W during yarn along
The rake 32A of its upper end starts to glide and imports, so that yarn W is set around downwards on ceramics pole 42A, and has and first
Effect that embodiment is identical.
When sending yarn, yarn W its with stainless steel guide ware 30A the produced electrostatic of friction, through guide ware 30A body,
Electroconductive elastic sheet 35A, central shaft 50 are directed to support body 100 ground connection, and have effect identical with first embodiment.
Ceramics pole 42 in previous embodiment, 42A are the most smooth and have a little friction, be therefore available for yarn W around
Being set as circle, when the Yarn feeding wheel as irregular yarn-feeding uses, it can be worked as irregularly (passive) and send yarn and actively quantitatively send yarn two
Use Yarn feeding wheel device.
Previous embodiment all illustrates as a example by ceramics pole, in the case of being made solid ceramic cylinder, from using metal again
Rod supports, it is possible to substituted with suitable high-abrasive material by ceramic material.
And conductive plate or guide ware also can be made suitable shape and guide through central shaft with the electrostatic guiding friction generation
To support body ground connection, and electrostatic can be eliminated.
Described above is illustrating of the possible embodiments for the present invention, and above-described embodiment also is not used to limit this
Bright the scope of the claims, all equivalences done without departing from the technology of the present invention spirit are implemented or change, are intended to be limited solely by the special of the present invention
In profit scope.
Claims (10)
1. a Yarn feeding wheel improvement structure, this Yarn feeding wheel is the lower section being rotationally arranged at a support body by a central shaft, its
It is characterised by:
Yarn post group is sent around being provided with one in this Yarn feeding wheel outside, and this send yarn post group to include some stainless steel columns, and respectively this is stainless
Alternate at least one ceramics pole that is provided with between steel column, respectively this stainless steel column upper end has to slope inwardly and extends into this Yarn feeding wheel
One guide section and pars intermedia slightly inwardly concave the yarn storage section of this Yarn feeding wheel, and this ceramics pole outer rim is outwardly the most stainless in this
The yarn storage section of steel column.
Yarn feeding wheel the most according to claim 1 improvement structure, it is characterised in that: this ceramics pole is for a hollow cylinder, and
It is provided with a metal bar in middle vacancy.
Yarn feeding wheel the most according to claim 1 improvement structure, it is characterised in that: this ceramics pole is for a solid cylinder.
4. improve structure according to the Yarn feeding wheel described in claim 1 or 2 or 3, it is characterised in that: this ceramics pole is for fixing or can
Rotational structure.
Yarn feeding wheel the most according to claim 1 improvement structure, it is characterised in that: this Yarn feeding wheel has on one wheel cap with once
Wheel cap, between this upper and lower wheel cap, sandwiched one has the conductive plate of electroconductive elastic sheet, this conductive plate periphery be provided with plural number arc-shaped slits in order to
Contacting with this stainless steel column, this this electroconductive elastic sheet of conductive plate mat contacts with this central shaft, makes a yarn and this stainless steel column grind
Wipe produced electrostatic, be directed to this support body ground connection through this arc-shaped slits, this conductive plate, this electroconductive elastic sheet and this central shaft
And eliminate electrostatic.
6. a Yarn feeding wheel improvement structure, this Yarn feeding wheel has wheel cap and wheel cap once on one, and this Yarn feeding wheel mat one central shaft
Bar, to be rotationally arranged at the lower section of a support body, is characterized by:
Yarn post group is sent around being provided with one in this Yarn feeding wheel outside, this send yarn post group include plural number ceramics pole, on this wheel cap with should
Arranging a stainless guide ware between lower wheel cap, this guide ware plugs together on this in slot of wheel cap, and this guide ware has inwardly
Tilting to extend into a rake of this Yarn feeding wheel, this rake is offered plural number circular hole and is worn for this ceramics pole.
Yarn feeding wheel the most according to claim 6 improvement structure, it is characterised in that: this ceramics pole is for a hollow cylinder, and
It is provided with a metal bar in middle vacancy.
Yarn feeding wheel the most according to claim 6 improvement structure, it is characterised in that: this ceramics pole is for a solid cylinder.
9. improve structure according to the Yarn feeding wheel described in claim 6 or 7 or 8, it is characterised in that: this ceramics pole is for fixing or can
Rotational structure.
Yarn feeding wheel the most according to claim 6 improvement structure, it is characterised in that: the planar base of this guide ware sets a tool
Having electroconductive elastic sheet, this electroconductive elastic sheet is contacted with this central shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280038.XA CN103572489B (en) | 2012-08-08 | 2012-08-08 | Yarn feeding wheel improvement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280038.XA CN103572489B (en) | 2012-08-08 | 2012-08-08 | Yarn feeding wheel improvement structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103572489A CN103572489A (en) | 2014-02-12 |
| CN103572489B true CN103572489B (en) | 2016-09-14 |
Family
ID=50045162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210280038.XA Expired - Fee Related CN103572489B (en) | 2012-08-08 | 2012-08-08 | Yarn feeding wheel improvement structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN103572489B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088042A (en) * | 2014-06-11 | 2014-10-08 | 吴江龙升纺织有限公司 | Spinning ingot frame |
| CN106283372B (en) * | 2016-10-20 | 2019-04-23 | 厦门绫亚针织机械配件有限公司 | A kind of ceramic rod, yarn storage wheel lower whorl and the yarn storage wheel of the yarn storage wheel lower whorl of improvement |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19840727A1 (en) * | 1998-09-07 | 2000-05-25 | Memminger Iro Gmbh | Thread delivery device for textile machines |
| DE19932481A1 (en) * | 1999-07-12 | 2001-01-18 | Memminger Iro Gmbh | Thread delivery device for textile machines |
| DE10219537B4 (en) * | 2002-05-02 | 2005-12-29 | Memminger-Iro Gmbh | Yarn feeder |
| CN2804141Y (en) * | 2005-05-11 | 2006-08-09 | 陈仁惠 | Combined yarn tansfer roller |
| DE102006058083A1 (en) * | 2006-12-07 | 2008-06-12 | Memminger-Iro Gmbh | Lockable thread eyelet |
| CN201136943Y (en) * | 2007-11-21 | 2008-10-22 | 金鼎贺科技企业有限公司 | Thread feeder |
| CN201250326Y (en) * | 2008-07-21 | 2009-06-03 | 林天来 | Yarn storage wheel structure of yarn storage and delivery device |
| CN201593105U (en) * | 2009-12-17 | 2010-09-29 | 启圣(厦门)机械有限公司 | Improved structure of yarn feeding wheel |
| CN202786672U (en) * | 2012-08-08 | 2013-03-13 | 陈仁惠 | Yarn feeding wheel improved structure |
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2012
- 2012-08-08 CN CN201210280038.XA patent/CN103572489B/en not_active Expired - Fee Related
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