CN1493728A - Sewing machine and shuttle for sewing machine - Google Patents
Sewing machine and shuttle for sewing machine Download PDFInfo
- Publication number
- CN1493728A CN1493728A CNA031254837A CN03125483A CN1493728A CN 1493728 A CN1493728 A CN 1493728A CN A031254837 A CNA031254837 A CN A031254837A CN 03125483 A CN03125483 A CN 03125483A CN 1493728 A CN1493728 A CN 1493728A
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- shuttle
- sewing machines
- resin
- tube
- carbon nano
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- Sewing Machines And Sewing (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Sliding-Contact Bearings (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
To provide a sewing machine greatly improving sliding performance and abrasion resistance of sliding parts of relatively moving first and second members. This sewing machine is provided with a resin film 37 corresponding to the sliding part and covering a sliding rail 19 of a rotating hook bobbin case holder 3, the resin film 37 is composed of thermoplastic polyimide, at least, including a carbon nanotube (CNT) and the CNT has a fiber shape with a diameter of 100nm or less and a length of 1[mu]m or more. (C)2004,JPO.
Description
Technical field
The present invention relates between the 1st member of relative motion and the 2nd member, to have the Sewing machines of slipper and have outside the Sewing machines of shuttle and Nei Suo.
Background technology
, in the shuttle of Sewing machines, openly put down into shown in 10 years No. 272274 communique as the Japanese Patent Laid application in the past, and formed rail groove on the shuttle outside, the rail bar of interior shuttle enters in this rail groove and slides relatively.At this moment, in order to improve sliding and mar proof, on the rail bar of interior shuttle, be formed with sliding layer.This sliding layer is made of the macromolecular composition that contains in the polyamide-based resin as the silicone oil of lubricant.In this macromolecular composition, contain the fibre strengthening agent of PAN based carbon fiber etc. again.
Yet, as mentioned above,, exist the problem of the sliding and the mar proof that can not fully improve slipper if only form sliding layer by the macromolecular composition that contains common carbon fiber.That is, because of the diameter of common carbon fiber is about 5 μ m, so it is less all to expose the surface area of carbon fiber with respect to the surface area that slides, the result is the sliding properties that has reduced slipper.
The object of the invention is, the Sewing machines of the sliding of slipper of the 1st member that can fully improve relative motion and the 2nd member and mar proof is provided and can fully improves the sliding of slipper of outer shuttle and interior shuttle and the shuttle of the Sewing machines of mar proof.
Summary of the invention
Sewing machines of the present invention, relative motion, have in the 1st member and the 2nd member of slipper each other, the slipper of at least the 1 member is made of the resin that is mixed with carbon nano-tube (carbon nano tube).
Carbon nano-tube is because of harder than resin, and sliding is good, so can improve sliding properties by it being configured to sliding surface.In this occasion, because carbon nano-tube is littler than the diameter of carbon fiber, therefore, can make that to expose the surface area of carbon nano-tube with respect to the whole surface area that slides many greatly, the result can fully improve the sliding and the mar proof of the slipper of the 1st member of relative motion and the 2nd member.Again, because of carbon nano-tube is the tubulose of hollow, weight is lighter, so also can make the 1st member realize lightweight.
At this moment, can make described carbon nano-tube below the diameter 100nm, the drum (fiber shape) more than the length 1 μ m.Thus, can further improve the sliding properties of slipper.
Can adopt the polyamide or the polyamide-imide of thermoplasticity to be used as above-mentioned resin.Because of these polyamide and polyamide-imide itself are not easy wearing and tearing,, can further improve sliding properties so compare with the occasion of other resin of use.By using the thermoplasticity material, the formability aspect is also good.
Again, according to the inventor's research, the combined amount of described carbon nano-tube is preferably in more than the 1 weight %.Thus, can obtain good sliding properties.As the upper limit of combined amount, to be advisable below the 20 weight %.
Also can in resin, mix the carbon fiber more than the diameter 1 μ m.The above carbon fiber price of diameter 1 μ m is lower, has certain effect to improving sliding properties, therefore, by with itself and carbon nano-tube and usefulness, can reduce the use amount of the carbon nano-tube of high price, with the reduction price.
Also can in resin, mix fluororesin.Because of the fluororesin coefficient of friction is little,, can further improve the sliding properties of slipper so make the surperficial sliding of slipper better.By mixing fluororesin, also has the advantage of the dispersiveness that improves carbon nano-tube.The combined amount of fluororesin is preferably below 10 weight %.
Slipper as in the Sewing machines includes: the slipper of slipper, thread take-up tension lever axle and the slide block of the interior shuttle of shuttle and the slipper of outer shuttle, shank and shank support member, the sliding part of cranking arm with bent axle grade.Wherein, because the present invention is applicable to the interior shuttle of the endurance issues that revolution at a relatively high speed and use (slip) exist when the time is longer and the slipper of outer shuttle, therefore the sliding and the mar proof of the slipper of shuttle and outer shuttle improve durability in can fully improving, and have very large effect.
In this occasion, the structure that normally adopts the sliding tray make outer shuttle to slide, but from the viewpoint of formability with respect to the rail plate of interior shuttle, preferably the surface element with the rail plate of interior shuttle is made of the resin that is mixed with carbon nano-tube.
The shuttle of Sewing machines of the present invention is that at least one side of surface element of the rail plate of interior shuttle outer peripheral face that the surface element of the sliding tray of outer shuttle inner peripheral surface and the relativity chimeric with it are slided is made of the resin that is mixed with carbon nano-tube.The resin that is mixed with carbon nano-tube by use constitutes slipper, can fully improve the sliding and the mar proof of the slipper of outer shuttle and interior shuttle,
At this moment, if described carbon nano-tube is the drum that diameter 100nm is following, length 1 μ m is above, then can further improve the sliding properties of slipper.
If the polyamide of use thermoplasticity or polyamide-imide then can further improve sliding properties as above-mentioned resin, the formability aspect is also good.
Be set in more than the 1 weight % by combined amount, then can obtain good sliding properties carbon nano-tube.
If in resin, be mixed with the carbon fiber more than the diameter 1 μ m, then can reduce the use amount of the carbon nano-tube of high price, to reduce price.
If in described resin, be mixed with fluororesin, then can further improve the sliding properties of slipper.The dispersiveness that can help improving also.
The simple declaration of accompanying drawing
Fig. 1 represents the shuttle construction of the Sewing machines of one embodiment of the invention, (a) is the profile of this outer shuttle and Nei Suo, (b) amplifies the profile of expression for this slipper.
Fig. 2 is the chart of the data of expression result of the test.
Fig. 3 is the chart of the data of another result of the test of expression.
Fig. 4 is the chart of the data of the another result of the test of expression.
The specific embodiment
Below with reference to Fig. 1～Fig. 4 one embodiment of the invention is described.Present embodiment is the occasion that the present invention is applicable to the shuttle of industrial sewing machines.Fig. 1 is the profile of shuttle section of the Sewing machines of present embodiment.At first, shown in Fig. 1 (a), the shuttle of present embodiment have outer shuttle 1 and be contained in this outer shuttle 1, the interior shuttle 3 consistent with gyroaxis.
Wherein, outer shuttle 1 by the outer shuttle body 5 of central authorities, be installed on big peristome 7 sides ring-type interior shuttle pressing plate 9 and constitute with the hub portion 11 of interior shuttle pressing plate 9 reverse side settings.Formation has the stage portion 15 of lateral surface 17A and all side 17C on the shuttle body 5 outside described, has been formed the sliding tray 17 of ring-type by the medial surface 17B of this stage portion 15 and Nei Suo pressing plate 9.This sliding tray 17 be a kind of and described later in the rail plate 19 of shuttle 3 chimeric and can support the endless groove of interior shuttle 3 with reversing, be formed at the inner peripheral surface of the peristome 7 of outer shuttle 1.Again, described hub portion 11 have can chimeric fixedly shuttle driving shaft 21 centre bore 23.In addition, outside shuttle body 5 around fixing the wire loop that constitutes by metallic plate with the position of spur 31 adjacency and expand and open plate 33.
On the other hand, interior shuttle 3 has the cylindrical portion 35 with outer shuttle 1 chimeric (end is by obturation), and the periphery of this cylindrical portion 35 is formed with the rail plate 19 that ring-type is protruded.That is, shown in Fig. 1 (b), this rail plate 19 forms the state chimeric with sliding tray 17, has parallel left and right side 19A, 19B and the outer peripheral face 19C rectangular with this left and right side 19A, 19B.In this, can adorn in the shuttle 3 and contain not shown bottom line shuttle with getting.
Described outer shuttle 1 under the shuttle 3 rotating states, carries out high speed rotary (as 8000rpm) by the shuttle driving shaft 21 that is driven by not shown electrical motor of sewing machine revolution in described by not shown shuttle retainer prevention.At this moment, rail plate 19 slides in sliding tray 17 relatively.Thus, interior shuttle 3 and outer shuttle 1 are equivalent to the 1st member of the present invention and the 2nd member respectively.In addition, described outer shuttle 1 and Nei Suo 3 for example constitute by soaking carbon hardened steel.
And, with described in the surface element of the suitable rail plate 19 of shuttle 3 slippers be provided with resin film 37.This resin film 37, is mixed with carbon nano-tube (being designated hereinafter simply as " CNT ") therein at least and constitutes as main body with thermoplasticity polyamide (PI).In this occasion, the amount of CNT is defined as more than the 1 weight %, below the 20 weight %.This resin film 37 for example can be shaped by outer folding card (outsert) and be provided with.
Described CNT is that a kind of diameter is that 100nm is following, length is the above drum (carbon fiber shape) of 1 μ m.Also can contain the above carbon fiber (being designated hereinafter simply as " CF ") of diameter 1 μ m as required or add below the fluororesin 10 weight %.
Like this, because of CNT is harder and sliding good than resin, so, can improve the sliding properties of the resin film 37 that is mixed with CNT by on its sliding surface, disposing CNT.At this moment, CNT is more much smaller than the diameter of CF, and the CF of the diameter 5 μ m by will be in the past changes over the CNT of diameter 100nm, and diameter becomes 1/50th, if its length is also similarly reduced, then in same volume, carbon surface is long-pending to be 50 2 powers.Can increase the CNT surface area that exposes with respect to the whole surface area that slides so significantly, when being mixed with same weight, compare with CF, a side the sliding properties that is mixed with CNT is far better.Can also more mix.Again, because of being tubulose (hollow form), so but lightweight.
Below the test of carrying out for the effect of confirming present embodiment is made an explanation.
At first, Fig. 2 represents to use pin dish (ピ ソ オ Application デ イ ス Network) type testing machine to obtain resin film 37 and be mixed with the occasion of CNT and the wear extent (wear rate) under the unmixing occasion and the result of the test of coefficient of friction.This test be by on rotating dish test film, 2 pin shapes are added sheets with fixed load push to the object's position of opening the interval of certain distance with the gyroaxis septum cordis, be a kind of known test method, for example can see the Japanese Patent Laid application for details and openly put down into communique 8 years No. 173668.
In this occasion, the dish material is that the SCM415 (chrome-molybdenum steel) corresponding with the sliding tray 17 of outer shuttle 1 soaks carbon hardened steel.Again, as experimental condition, the shape of pin is SR8 (sphere), and speed is 4m/s, and load is 0.5kgf.These are as the condition of preferring with the sliding condition of the Sewing machines real machine of reality.
The material of pin have 4 types promptly, containing carbon fiber 30 weight %, be added with the CNT that fluororesin for example is mixed with 0,1,3,5% (weight %) in the thermoplasticity polyamide below the polytetrafluoroethylene (PTFE) 10 weight % respectively.Again, wear extent is that the pin diameter after 40 minutes calculates, by calculating wear rate divided by load and displacement.
Its result, the wear rate of the unmixed CNT of having (0%) class is 0.00555mm
3/ kgfm, bigger, comparatively speaking, the wear rate that is mixed with the 1%CNT class is 0.003mm
3/ kgfm, the wear rate that is mixed with the 3%CNT class is 0.003mm
3/ kgfm, the wear rate that is mixed with the 5%CNT class is 0.002mm
3/ kgfm.Thus,, then can obtain to reduce the effect of wear rate, preferably mix more than 5% if CNT is mixed more than 1%.In addition, four kinds do not have big difference aspect coefficient of friction.
Fig. 3 represent respectively for polyamide+CF+ fluororesin, polyamide+CF, polyamide+fluororesin, polyamide four classes blank, by changing the result after the CNT combined amount is tested equally.
From this result of the test, can confirm,, then in all blanks, all exist the tendency that wear rate reduces if increase the CNT combined amount.Again, when containing fluororesin, because of coefficient of friction is decreased to 0.2 from 0.4, it is good to demonstrate sliding, so wear rate also reduces.In addition, though in Fig. 3, do not make diagram, can confirm, if in monomer of polyamide, be mixed with CNT20 weight % when above, can obtain and the equal wear rate of polyamide+CF+10%CNT, yet, because of CNT price height, so at present preferably to use with the class of mixing of CF.
Fig. 4 represents to investigate the result of the test after the durability (life-span) of shuttle aspect of Sewing machines real machine.This result of the test is to repeat the result of the on-off in 5 seconds down with machine spindle 4000rpm (shuttle axle 8000rpm) state.At this, the wearing and tearing of the slipper of shuttle, its shake allowance are reached the roughly life-span of 0.2mm time point as shuttle.
As can be seen, in traditional method of having only mixed C F, the life-span of shuttle is about 400 hours from this result, but in 1 shuttle of the present embodiment more than being mixed with CNT5%, can realize increasing twice 800 hours durability.
The following describes variation of the present invention.
The foregoing description is with resin film 37 rail plate 19 to be coated, but also can adopt the resin that contains CNT to form rail plate 19 itself or adopt the resin that contains CNT form whole in shuttle.And, also can adopt the resin that contains CNT to form the stage portion 15 or the whole outer shuttle of outer shuttle 1.The slipper aspect of shuttle and interior shuttle does not limit outside, for example, can be used in the slipper of slipper, thread take-up tension lever axle and the slide block of shank and shank support member, the sliding part of cranking arm with bent axle grades yet.
Again, the foregoing description be to use the thermoplasticity polyamide as base resin so that it can carry out the example of ejection formation, but also can use other resin.Even thermoplasticity, the fusion temperature of above-mentioned polyamide is 400 ℃, need be heated to more than 400 degree metal pattern etc. during shaping, and temperature is very high, and operation is difficulty very.Can confirm that by experiment the polyamide-imide resin can obtain the sliding properties with the polyamide peer-level, near fusion temperature is in 300 ℃, also can use.Polyamide is to belong to the hardest and nonabradable material in the resin that uses as sliding material, but from cost and formability, also can use other resin instead.In as the resin of the sliding material of polyimide (PEI), polyether-ether-ketone (PEEK), polyphenylene sulfide more uses such as (PPS), also can on degree not of the same race, improve mar proof by adding CNT.
Again, as example, but under butter, oil lubrication, micro-oil supply condition, the sliding properties of the material of this structure also is the best to the foregoing description, by being mated use, can realize high lifeization with unlubricated fully (no oil supply).
Claims (14)
1. Sewing machines has slipper between the 1st member of relative motion and the 2nd member, it is characterized in that,
The slipper of described at least the 1st member is made of the resin that is mixed with carbon nano-tube.
2. Sewing machines as claimed in claim 1 is characterized in that, the diameter of described carbon nano-tube is that 100 millimicrons (nm) are following, length is 1 micron (μ m) above drum.
3. Sewing machines as claimed in claim 1 is characterized in that, described resin is the polyamide or the polyamide-imide of thermoplasticity.
4. Sewing machines as claimed in claim 1 is characterized in that, the combined amount of described carbon nano-tube is more than 1 weight %.
5. Sewing machines as claimed in claim 1 is characterized in that, is mixed with the carbon fiber more than the diameter 1 μ m in described resin.
6. Sewing machines as claimed in claim 1 is characterized in that, is mixed with fluororesin in described resin.
7. as each described Sewing machines of claim 1 to 6, it is characterized in that described the 1st member and the 2nd member are respectively Nei Suo and outer shuttle.
8. Sewing machines as claimed in claim 7 is characterized in that, the surface element of the rail plate of described interior shuttle is made of the resin of the carbon nano-tube that mixes.
9. the shuttle of a Sewing machines, comprising: inner peripheral surface has the outer shuttle of sliding tray; And have that to be contained in this outer shuttle interior, chimeric with described sliding tray and carry out the interior shuttle of the relative rail plate that slides on outer peripheral face, it is characterized in that,
At least one side in the surface element of described sliding tray and the described rail plate surface element is made of the resin that is mixed with carbon nano-tube.
10. the shuttle of Sewing machines as claimed in claim 9 is characterized in that, the diameter of described carbon nano-tube is that 100 millimicrons (nm) are following, length is 1 micron (μ m) above drum.
11. the shuttle of Sewing machines as claimed in claim 9 is characterized in that, described resin is the polyamide or the polyamide-imide of thermoplasticity.
12. the shuttle of Sewing machines as claimed in claim 9 is characterized in that, the combined amount of described carbon nano-tube is more than 1 weight %.
13. the shuttle of Sewing machines as claimed in claim 9 is characterized in that, is mixed with the carbon fiber more than the diameter 1 μ m in described resin.
14. the shuttle of Sewing machines as claimed in claim 9 is characterized in that, is mixed with fluororesin in described resin.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002280416 | 2002-09-26 | ||
| JP2002-280416 | 2002-09-26 | ||
| JP2002280416A JP2004113435A (en) | 2002-09-26 | 2002-09-26 | Sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1493728A true CN1493728A (en) | 2004-05-05 |
| CN1493728B CN1493728B (en) | 2012-09-05 |
Family
ID=32275129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03125483 Expired - Fee Related CN1493728B (en) | 2002-09-26 | 2003-09-23 | Sewing machine and shuttle for sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004113435A (en) |
| CN (1) | CN1493728B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103492769A (en) * | 2011-10-31 | 2014-01-01 | 株式会社理研 | Piston ring |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02298555A (en) * | 1989-05-15 | 1990-12-10 | Asahi Chem Ind Co Ltd | Resin composition for electrically conductive sliding member |
| JPH10272274A (en) * | 1997-04-01 | 1998-10-13 | Juki Corp | Shuttle for sewing machine |
| JP2001178979A (en) * | 1999-10-15 | 2001-07-03 | Juki Corp | Rotating hook device for sewing machine |
| JP4535634B2 (en) * | 2000-03-31 | 2010-09-01 | 大阪瓦斯株式会社 | Method for producing nanoscale needle-like material |
| JP2002020628A (en) * | 2000-07-03 | 2002-01-23 | Teijin Chem Ltd | Thermoplastic resin composition |
| JP3403153B2 (en) * | 2000-07-18 | 2003-05-06 | ジューキ株式会社 | Composition for sliding member and sliding member |
| JP2002105314A (en) * | 2000-09-29 | 2002-04-10 | Shimadzu Corp | Lubricating composition |
-
2002
- 2002-09-26 JP JP2002280416A patent/JP2004113435A/en active Pending
-
2003
- 2003-09-23 CN CN 03125483 patent/CN1493728B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103492769A (en) * | 2011-10-31 | 2014-01-01 | 株式会社理研 | Piston ring |
| CN103492769B (en) * | 2011-10-31 | 2016-05-18 | 株式会社理研 | Piston ring |
| US9709169B2 (en) | 2011-10-31 | 2017-07-18 | Kabushiki Kaisha Riken | Piston ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1493728B (en) | 2012-09-05 |
| JP2004113435A (en) | 2004-04-15 |
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Granted publication date: 20120905 Termination date: 20200923 |