JP2003326069A - Sewing machine - Google Patents
Sewing machineInfo
- Publication number
- JP2003326069A JP2003326069A JP2002138182A JP2002138182A JP2003326069A JP 2003326069 A JP2003326069 A JP 2003326069A JP 2002138182 A JP2002138182 A JP 2002138182A JP 2002138182 A JP2002138182 A JP 2002138182A JP 2003326069 A JP2003326069 A JP 2003326069A
- Authority
- JP
- Japan
- Prior art keywords
- needle bar
- sewing machine
- surface roughness
- dlc
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Sewing Machines And Sewing (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本発明はミシンに関し、特
に、相対運動する第１部材と第２部材の摺動部分の耐磨
耗性を改善したミシンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine, and more particularly, to a sewing machine having improved wear resistance of sliding portions of a first member and a second member which move relative to each other.
【０００２】[0002]
【従来の技術】 従来のミシンにおいては、針棒と針棒
支持部材、天秤と天秤支持部材、針棒抱きと針棒クラン
クロッド等々、相対運動する２部材の摺動部分にグリー
ス等の潤滑油が注入され、その潤滑油により前記摺動部
分を潤滑するようにしている。従来の技術では、２部材
の摺動部分を磨耗防止のために潤滑油で潤滑することは
不可欠である。ところが、近年、ミシンの相対運動する
第１部材と第２部材の摺動部分において、低摩擦高硬度
のＤＬＣ皮膜等の適用が試みられている。例えば、特開
平９−４７５９６号公報には、第１部材の表面にＤＬＣ
コーティングを施し、第２部材の表面にフッ素系皮膜を
形成した技術が開示されている。2. Description of the Related Art In a conventional sewing machine, a lubricating oil such as grease is applied to a sliding portion of two members that relatively move, such as a needle bar and a needle bar support member, a balance and a balance support member, a needle bar holder and a needle bar crank rod. Is injected and the sliding oil is lubricated by the lubricating oil. In the conventional technology, it is indispensable to lubricate the sliding parts of the two members with lubricating oil to prevent wear. However, in recent years, it has been attempted to apply a low friction and high hardness DLC film or the like to the sliding portion of the first member and the second member of the sewing machine, which relatively move. For example, in Japanese Patent Laid-Open No. 9-47596, DLC is formed on the surface of the first member.
A technique is disclosed in which a coating is applied and a fluorine-based film is formed on the surface of the second member.
【０００３】[0003]
【発明が解決しようとする課題】 しかしながら、従来
のミシンにおいて、単純に摺動部分にＤＬＣコーティン
グをしただけでは、摺動部分の摺動性と耐磨耗性を十分
に高めることができないという問題点がある。However, in the conventional sewing machine, it is not possible to sufficiently improve the slidability and abrasion resistance of the sliding portion by simply coating the sliding portion with the DLC coating. There is a point.
【０００４】すなわち、第２部材の表面粗さに対して、
ＤＬＣコーティングされた第１部材の表面粗さが略同じ
か、または大きい場合、ＤＬＣコーティングの凸形状部
分が第２部材を削るアブレッシブ摩耗が進行の度合いが
著しく、本願発明者等の実験によれば、特に、２本針本
縫いミシンでは、高速摺動部分の天秤部分と、高荷重の
かかるクランク軸部分とがネックとなり、早いもので８
時間程度の駆動で天秤部分が焼き付いてロックしたり、
数百時間を超えてクランク軸部分が焼き付いてロックし
たりしていた。That is, with respect to the surface roughness of the second member,
When the surface roughness of the DLC-coated first member is substantially the same or large, the degree of progress of the abrasive wear in which the convex-shaped portion of the DLC coating scrapes the second member is remarkable, and according to experiments by the present inventors, Especially, in the 2-needle lockstitch sewing machine, the balance part of the high-speed sliding part and the crankshaft part to which a high load is applied become the neck, and
The balance part will be seized and locked by driving for about an hour,
The crankshaft part was seized and locked for more than several hundred hours.
【０００５】また、摺動部分にグリース等の潤滑剤が添
付されている場合、削られた第２部材が潤滑剤に混じっ
て潤滑剤が劣化したり、摩耗することによる発熱で潤滑
剤が酸化したり蒸発したりして、潤滑寿命が短くなると
いう問題点がある。Further, when a lubricant such as grease is attached to the sliding portion, the scraped second member mixes with the lubricant to deteriorate the lubricant, or the lubricant is oxidized due to heat generated by abrasion. There is a problem that the lubrication life is shortened due to evaporation or evaporation.
【０００６】本発明は、上述した問題点を解決するため
になされたものであり、相対運動する第１部材と第２部
材の摺動部分の摺動性と耐磨耗性を格段に高めることが
できるミシンを提供することである。The present invention has been made in order to solve the above-mentioned problems, and remarkably enhances the slidability and abrasion resistance of the sliding portions of the first member and the second member which move relative to each other. Is to provide a sewing machine that can
【０００７】[0007]
【課題を解決するための手段】 この目的を達成するた
めに、請求項１記載のミシンは、相対運動する第１部材
と第２部材との間に摺動部分を有し、第１部材の摺動部
分にＤＬＣコーティングが施されたミシンにおいて、前
記第１部材のＤＬＣコーティングされた面の表面粗さ
が、前記第２部材の摺動部分の表面粗さよりも小さく、
且つ、第１部材のＤＬＣコーティングされた面が、第２
部材の摺動部分よりも硬いことを特徴とするものであ
る。In order to achieve this object, a sewing machine according to claim 1 has a sliding portion between a first member and a second member that move relative to each other, and In the sewing machine in which the sliding portion is DLC-coated, the surface roughness of the DLC-coated surface of the first member is smaller than the surface roughness of the sliding portion of the second member,
In addition, the DLC coated surface of the first member is the second
It is characterized by being harder than the sliding portion of the member.
【０００８】この構成によれば、第１部材のＤＬＣコー
ティングされた面の表面粗さが小さいので、第１部材に
よる第２部材へのアブレッシブ摩耗の進行を抑えること
ができる。また、第２部材よりも第１部材のＤＬＣコー
ティングされた面のほうが硬いため、第２部材が第１部
材のＤＬＣコーティングにダメージを与えることも非常
に少ない。According to this structure, since the surface of the DLC-coated surface of the first member is small, it is possible to suppress the progress of the abrasive wear of the first member on the second member. Moreover, since the DLC-coated surface of the first member is harder than the second member, the second member is very unlikely to damage the DLC coating of the first member.
【０００９】請求項２のミシンは、請求項１の発明にお
いて、第１部材の基材の表面粗さが、第２部材の表面粗
さよりも小さいことを特徴とするものである。この構成
によれば、第１部材にＤＬＣコーティングすることによ
り、第１部材の基材の表面粗さと略同じ表面粗さのＤＬ
Ｃコーティングを施すことができる。According to a second aspect of the present invention, in the invention of the first aspect, the surface roughness of the base material of the first member is smaller than the surface roughness of the second member. According to this configuration, by performing the DLC coating on the first member, the DL having the surface roughness substantially the same as the surface roughness of the base material of the first member is formed.
A C coating can be applied.
【００１０】請求項３のミシンは、請求項１または２の
発明において、ＤＬＣコーティングの表面粗さが０．２
ミクロン以上且つ１ミクロン以下であることを特徴とす
るものである。表面粗さが０．２ミクロン未満のいわゆ
る鏡面加工することは非常に生産性がわるいが、０．２
ミクロン以上且つ１ミクロン以下であれば加工がしやす
く生産性を向上することができる。The sewing machine of claim 3 is the same as the sewing machine of claim 1 or 2, wherein the surface roughness of the DLC coating is 0.2.
It is characterized in that it is not less than 1 micron and not more than 1 micron. The so-called mirror finishing with a surface roughness of less than 0.2 micron is very poor in productivity, but 0.2
If it is not less than 1 micron and not more than 1 micron, it is easy to process and the productivity can be improved.
【００１１】請求項４のミシンは、請求項１〜３の何れ
かの発明において、第２部材の表面粗さが１．５ミクロ
ン以上であることを特徴とするものである。この構成に
よれば、初期の摩擦摩耗によって第２部材の凸部が削ら
れて当たり面が形成されても、凹部が完全に無くなるこ
とがなく、グリース等の潤滑剤を使用する場合、第２部
材の凹部が潤滑剤を保持するので、摺動部分の摺動性と
耐摩耗性を格段に向上することができる。According to a fourth aspect of the present invention, the sewing machine according to any one of the first to third aspects is characterized in that the surface roughness of the second member is 1.5 μm or more. According to this configuration, even if the convex portion of the second member is shaved and the contact surface is formed by the initial frictional wear, the concave portion is not completely lost, and when the lubricant such as grease is used, Since the concave portion of the member holds the lubricant, the slidability and wear resistance of the sliding portion can be significantly improved.
【００１２】[0012]
【発明の実施の形態】 以下、本発明の実施の形態につ
いて図面を参照して説明する。本実施形態は２本針ミシ
ンに本発明を適用した場合の一例である。尚、図１に矢
印で示す前後左右を前後左右として説明する。Embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example of applying the present invention to a two-needle sewing machine. In addition, the front-rear and left-right directions indicated by arrows in FIG.
【００１３】図１に示すように、２本針ミシンＭ（以
下、ミシンＭという）は、左右方向に長いベッド部１
と、ベッド部１の右部から上方へ延びる脚柱部２と、脚
柱２からベッド部１と対向するように左方へ延びるアー
ム部３とを有する。As shown in FIG. 1, a two-needle sewing machine M (hereinafter referred to as a sewing machine M) has a bed portion 1 which is long in the left-right direction.
And a pedestal portion 2 extending upward from the right part of the bed portion 1, and an arm portion 3 extending leftward from the pedestal 2 so as to face the bed portion 1.
【００１４】アーム部２の内部に、左右方向向きの主軸
５が配設され、この主軸５の下側に左右方向向きの針棒
揺動軸６が配設されている。主軸５の右端部分はアーム
部３から外部へ突出し、その突出部分にプーリ７が固着
されている。このプーリ７とミシンモータで駆動される
プーリとにベルトが掛けられ、ミシンモータの駆動力が
プーリとベルトを介して主軸５に伝達されて主軸５が回
転駆動される。A main shaft 5 oriented in the left-right direction is disposed inside the arm portion 2, and a needle bar swing shaft 6 oriented in the left-right direction is disposed below the main shaft 5. The right end portion of the main shaft 5 protrudes from the arm portion 3 to the outside, and the pulley 7 is fixed to the protruding portion. A belt is wound around the pulley 7 and a pulley driven by a sewing machine motor, and the driving force of the sewing machine motor is transmitted to the main shaft 5 via the pulley and the belt, and the main shaft 5 is rotationally driven.
【００１５】アーム部３の左端部分は頭部４に形成さ
れ、この頭部４の内部に、図１、図２に示すように、ク
ランク８、クランクレバー９、針棒抱き１０、針棒１
１、針棒支持部材１２、天秤１６を有する天秤機構１５
が設けられている。針棒１１の下端部分は頭部４の下側
へ突出し、その先端部に２本針１３が装着されている。
主軸５の左端部にクランク８が固着され、クランクレバ
ー９の上端部がクランク８のクランク軸２０に回動自在
に連結され、クランクレバー９の下端部が針棒抱き１０
に回動自在に連結されている。The left end portion of the arm portion 3 is formed on a head portion 4, and inside the head portion 4, as shown in FIGS. 1 and 2, a crank 8, a crank lever 9, a needle bar holder 10, a needle bar 1 are provided.
1, a needle bar support member 12, a balance mechanism 15 having a balance 16
Is provided. The lower end portion of the needle bar 11 projects to the lower side of the head portion 4, and the two needles 13 are attached to the tip end portion thereof.
The crank 8 is fixed to the left end of the main shaft 5, the upper end of the crank lever 9 is rotatably connected to the crank shaft 20 of the crank 8, and the lower end of the crank lever 9 is the needle bar holder 10.
Is rotatably connected to.
【００１６】針棒１１の長さ方向途中部が針棒抱き１０
に内嵌固定され、針棒１１は針棒抱き１１の上下両側に
おいて針棒支持部材１２に上下動自在に支持されてい
る。つまり、主軸５が回転駆動されると、クランク８と
クランクレバー９を介して針棒抱き１０と針棒１１が上
下に往復駆動される。尚、天秤機構１５の天秤１６は、
固定軸２２に回動可能に設けられ、天秤１６と一体に形
成された天秤軸２４がクレンクレバー９に回動可能に取
り付けられた滑り子２６内を摺動するように構成されて
いる。そして、天秤１６は、針棒１１の上下動に同期し
て所定のタイミングで上下に揺動駆動される。尚、針棒
揺動軸６が回転駆動されることにより、針棒支持部材１
２と共に針棒１１（針棒抱き１０）が前後水平方向に揺
動駆動される。The middle portion of the needle bar 11 in the longitudinal direction is the needle bar holder 10
The needle bar 11 is supported by the needle bar support member 12 on both upper and lower sides of the needle bar holder 11 so as to be vertically movable. That is, when the main shaft 5 is rotationally driven, the needle bar holder 10 and the needle bar 11 are vertically reciprocally driven via the crank 8 and the crank lever 9. The balance 16 of the balance mechanism 15 is
A balance shaft 24, which is rotatably provided on the fixed shaft 22 and is integrally formed with the balance 16, is configured to slide in a slider 26 rotatably attached to the Clenck lever 9. Then, the balance 16 is rocked up and down at a predetermined timing in synchronization with the vertical movement of the needle bar 11. The needle bar swinging shaft 6 is driven to rotate, whereby the needle bar supporting member 1
Along with 2, the needle bar 11 (needle bar holder 10) is rockably driven in the front-rear horizontal direction.
【００１７】さて、相対運動する針棒１１（これが第１
部材に相当する）と、針棒支持部材１２（これが第２部
材に相当する）の摺動部分において、図３に模式的に示
すように、針棒１１の基材２８の表面にＤＬＣ皮膜（コ
ーティング）３０が形成され、針棒支持部材１２の基材
３２に支持されている。Now, the needle bar 11 which moves relatively (this is the first
(Corresponding to a member) and a needle bar supporting member 12 (which corresponds to a second member) at a sliding portion, as schematically shown in FIG. Coating) 30 is formed and is supported by the base material 32 of the needle bar support member 12.
【００１８】針棒支持部材１２は、針棒１１の左側に位
置する上下方向に長い連結部１２ａと、この連結部１２
ａの上下両側の１対の筒状の軸受け部１２ｂとを有し、
各軸受け部１２ｂに針棒１１が摺動自在に挿通してガイ
ド支持されている。即ち、針棒１１の表面のうち少なく
とも軸受け部１２ｂと摺動する部分にＤＬＣ皮膜３０が
形成されている。The needle bar support member 12 has a vertically long connecting portion 12a located on the left side of the needle bar 11 and the connecting portion 12a.
a pair of cylindrical bearing portions 12b on the upper and lower sides of a,
The needle bar 11 is slidably inserted into each bearing 12b and is guided and supported. That is, the DLC film 30 is formed on at least a portion of the surface of the needle bar 11 that slides on the bearing portion 12b.
【００１９】針棒１１の基材２８はＳＫ材、ＳＣＭ材な
どの鋼材の表面を浸炭焼き入れして硬化したものが表面
研磨されており、その表面粗さ、Ｒｚ（１０点平均粗
さ）は１ミクロン以下が望ましい。この表面粗さは小さ
いほどよいがあまり小さくするのは、加工が難しくなっ
て生産性が悪くなるので、生産性を考慮した場合、０．
２ミクロン以上が望ましい。表面研磨方法としては、切
削研磨、ブラスト研磨、バレル研磨等が考えられるが、
特に表面突起を簡易に研磨できるバレル研磨がよい。The base material 28 of the needle bar 11 is obtained by carburizing and hardening the surface of a steel material such as SK material or SCM material and then polishing the surface. The surface roughness is Rz (10-point average roughness). Is preferably 1 micron or less. The smaller the surface roughness, the better. However, if the surface roughness is made too small, the productivity becomes poor because the processing becomes difficult.
2 microns or more is desirable. As the surface polishing method, cutting polishing, blast polishing, barrel polishing, etc. can be considered,
Particularly, barrel polishing is preferable because it can easily polish the surface protrusions.
【００２０】このように研磨された基材２８にＤＬＣ皮
膜３０が形成されるので、表面粗さ、Ｒｚ（１０点平均
粗さ）が１ミクロン以下のＤＬＣ皮膜３０を簡単に形成
することができる。Since the DLC film 30 is formed on the base material 28 thus polished, the DLC film 30 having a surface roughness Rz (10-point average roughness) of 1 micron or less can be easily formed. .
【００２１】尚、本実施の形態のＤＬＣはＵＢＭスパッ
タ法で作成された硬度３０００ＨｖのＤＬＣであり、そ
の厚さは１ミクロン以上、望ましくは１．５ミクロンが
よい。また、基材２８とＤＬＣ皮膜３０との間には中間
層として、厚さ約０．５ミクロンのＣｒ皮膜３４が形成
されている。The DLC of this embodiment is a DLC having a hardness of 3000 Hv produced by the UBM sputtering method, and its thickness is 1 micron or more, preferably 1.5 micron. Further, a Cr film 34 having a thickness of about 0.5 μm is formed as an intermediate layer between the base material 28 and the DLC film 30.
【００２２】ＤＬＣについては硬度３０００Ｈｖ以外に
も、より高密度でダイヤモンド結晶比率の高いものを用
いてもよい。例えば、カソードアーク法で、硬度４００
０Ｈｖ以上のＤＬＣが作成でき、また、グラファイトフ
ィルタープロセスによりグラファイトドロップレッドの
無い面性状に優れたＤＬＣ皮膜が作成できる。また、プ
ラズマＣＶＤ法により作成されたＤＬＣ皮膜も硬度２０
００Ｈｖ程度で若干信頼性に欠けるが使用することも可
能である。ただし、多量の水素あるいはタングステン、
チタン、シリコン等の不純物を意図的に混ぜて硬度１０
００Ｈｖ程度のＤＬＣではミシンの相当寿命が３年程度
となり、望ましくない。As for DLC, in addition to the hardness of 3000 Hv, those having a higher density and a higher diamond crystal ratio may be used. For example, the cathodic arc method has a hardness of 400
A DLC of 0 Hv or more can be produced, and a graphite filter process can produce a DLC film having no graphite drop red and excellent surface properties. In addition, the DLC film produced by the plasma CVD method has a hardness of 20.
Although it is slightly unreliable at about 00 Hv, it can be used. However, a large amount of hydrogen or tungsten,
Hardness 10 by intentionally mixing impurities such as titanium and silicon
With a DLC of about 00 Hv, the equivalent life of the sewing machine is about 3 years, which is not desirable.
【００２３】一方、針棒支持部材１２の基材３２は、浸
炭焼入れの鉄鋼材料でその硬度は６０００〜９００Ｈｖ
であり、ＤＬＣ皮膜３０の硬度に比べて柔らかい。ま
た、基材３２の表面のプロファイルは規則的にくぼみを
形成したり傷状のものを形成したりして、その表面粗
さ、Ｒｚが１．５ミクロン以上になるように形成されて
いる。このように、Ｒｚを１．５ミクロン以上にするこ
とにより、初期の摩擦摩耗によって基材３２の凸部３２
ａが削られて当たり面が形成されても、凹部３２ｂが完
全に無くなることがなく、グリース等の潤滑剤を使用す
る場合、基材３２の凹部３２ｂが潤滑剤を保持するの
で、摺動部分の摺動性と耐摩耗性を格段に向上すること
ができる。On the other hand, the base material 32 of the needle bar support member 12 is a carburized and hardened steel material having a hardness of 6000 to 900 Hv.
And is softer than the hardness of the DLC film 30. Further, the surface profile of the base material 32 is formed such that dents or scratches are regularly formed, and the surface roughness, Rz, is 1.5 μm or more. As described above, by setting Rz to be 1.5 μm or more, the convex portions 32 of the base material 32 are rubbed by the initial frictional wear.
Even if a is abraded to form a contact surface, the concave portion 32b does not completely disappear, and when a lubricant such as grease is used, the concave portion 32b of the base material 32 holds the lubricant. The slidability and wear resistance can be remarkably improved.
【００２４】図４はＤＬＣ皮膜３０の表面粗さと基材３
２の摩耗率との関係をピンオンディスク試験にて行った
結果である。この試験結果から分かるようにＤＬＣ皮膜
３０の表面粗さＲｚが１ミクロンの場合、その摩耗率が
約２×１０-9ｍｍ３／ｋｇｆ×ｍとなった。FIG. 4 shows the surface roughness of the DLC film 30 and the substrate 3.
It is the result of performing the relationship with the wear rate of 2 in the pin-on-disk test. As can be seen from the test results, when the surface roughness Rz of the DLC film 30 was 1 micron, the wear rate was about 2 × 10 −9 mm 3 / kgf × m.
【００２５】図５は実際のミシンにて耐久試験を行った
結果であり、ミシンの回転数は３５００ｒｐｍ、４００
時間を一年として想定してある。この試験結果から分か
るように、ＤＬＣ皮膜３０の表面粗さＲｚが１ミクロン
の場合、基材３２の表面粗さＲｚが１．５ミクロン以上
であれば５年相当以上の耐久性があることが確認でき
た。FIG. 5 shows the results of an endurance test conducted on an actual sewing machine. The rotation speed of the sewing machine was 3500 rpm and 400.
Time is assumed to be one year. As can be seen from the test results, when the surface roughness Rz of the DLC film 30 is 1 micron, if the surface roughness Rz of the substrate 32 is 1.5 micron or more, the durability may be equivalent to 5 years or more. It could be confirmed.
【００２６】本実施の形態においては、針棒１１と針棒
支持部材１２との摺動部分に関して説明したが、本発明
は、この部分に限定されることなく、例えば、天秤軸２
４と滑り子２６との摺動部分、クランクレバー９とクラ
ンク軸２０との摺動部分等にも利用可能である。In the present embodiment, the sliding portion between the needle bar 11 and the needle bar supporting member 12 has been described, but the present invention is not limited to this part, for example, the balance shaft 2
It can also be used as a sliding portion between the sliding member 4 and the slider 26, a sliding portion between the crank lever 9 and the crankshaft 20, and the like.
【００２７】[0027]
【発明の効果】以上説明したことから明らかなように、
請求項１記載のミシンは、第１部材のＤＬＣコーティン
グされた面の表面粗さが、第２部材の摺動部分の表面粗
さよりも小さく、且つ、第１部材のＤＬＣコーティング
された面が、第２部材の摺動部分よりも硬いため、第１
部材による第２部材へのアブレッシブ摩耗の進行を抑え
ることができる。また、第２部材が第１部材のＤＬＣコ
ーティングにダメージを与えることも非常に少ない。As is apparent from the above description,
The sewing machine according to claim 1, wherein the surface roughness of the DLC-coated surface of the first member is smaller than the surface roughness of the sliding portion of the second member, and the DLC-coated surface of the first member is Since it is harder than the sliding part of the second member,
It is possible to suppress the progress of the abrasive wear on the second member by the member. In addition, the second member does not significantly damage the DLC coating of the first member.
【００２８】請求項２のミシンは、第１部材の基材の表
面粗さが、第２部材の表面粗さよりも小さいため、第１
部材にＤＬＣコーティングすることにより、第１部材の
基材の表面粗さと略同じ表面粗さのＤＬＣコーティング
を施すことができる。In the sewing machine of claim 2, the surface roughness of the base material of the first member is smaller than the surface roughness of the second member.
By performing DLC coating on the member, it is possible to apply DLC coating having a surface roughness substantially the same as the surface roughness of the base material of the first member.
【００２９】請求項３のミシンは、ＤＬＣコーティング
の表面粗さが０．２ミクロン以上且つ１ミクロン以下で
あるため、表面粗さが０．２ミクロン未満のいわゆる鏡
面加工することは非常に生産性がわるいが、０．２ミク
ロン以上且つ１ミクロン以下であれば加工がしやすく生
産性を向上することができる。In the sewing machine of claim 3, since the surface roughness of the DLC coating is not less than 0.2 micron and not more than 1 micron, it is very productive to carry out so-called mirror finishing with the surface roughness of less than 0.2 micron. However, if it is 0.2 μm or more and 1 μm or less, it is easy to process and the productivity can be improved.
【００３０】請求項４のミシンは、第２部材の表面粗さ
が１．５ミクロン以上であるため、初期の摩擦摩耗によ
って第２部材の凸部が削られて当たり面が形成されて
も、凹部が完全に無くなることがなく、グリース等の潤
滑剤を使用する場合、第２部材の凹部が潤滑剤を保持す
るので、摺動部分の摺動性と耐摩耗性を格段に向上する
ことができる。According to the sewing machine of claim 4, since the surface roughness of the second member is 1.5 μm or more, even if the convex portion of the second member is shaved by the initial frictional wear to form the contact surface, When the lubricant such as grease is used without completely eliminating the concave portion, the concave portion of the second member retains the lubricant, so that the slidability and wear resistance of the sliding portion can be significantly improved. it can.
【図１】本実施形態に係る２本針ミシンの機枠内部の斜
視図である。FIG. 1 is a perspective view of the inside of a machine frame of a two-needle sewing machine according to this embodiment.
【図２】針棒及びその周辺の部材を含む要部の斜視図で
ある。FIG. 2 is a perspective view of a main part including a needle bar and members around the needle bar.
【図３】相対運動する第１部材と第２部材の摺動部分の
断面図である。FIG. 3 is a cross-sectional view of a sliding portion of a first member and a second member that relatively move.
【図４】耐久試験のデータを示すグラフである。FIG. 4 is a graph showing data of a durability test.
【図５】耐久試験のデータを示す別のグラフである。FIG. 5 is another graph showing data of a durability test.
Ｍ ２本針ミシン １１ 針棒（第１部材） １２ 針棒支持部材（第２部材） ２８ 基材 ３０ ＤＬＣ皮膜 ３２ 基材 M 2-needle sewing machine 11 Needle bar (first member) 12 Needle bar support member (second member) 28 Base material 30 DLC film 32 base material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宇野 仁 名古屋市瑞穂区苗代町15番１号 ブラザー 工業株式会社内 (72)発明者 大利 人美 名古屋市瑞穂区苗代町15番１号 ブラザー 工業株式会社内 Ｆターム(参考） 3B150 AA11 CC07 CE22 CE23 CE26 DA02 DB02 GB01 HA01 HA03 HA12 HA15 HA18 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hitoshi Uno Brother, 15-1, Naeshiro-cho, Mizuho-ku, Nagoya Industry Co., Ltd. (72) Inventor Hitomi Otoshi Brother, 15-1, Naeshiro-cho, Mizuho-ku, Nagoya Industry Co., Ltd. F term (reference) 3B150 AA11 CC07 CE22 CE23 CE26 DA02 DB02 GB01 HA01 HA03 HA12 HA15 HA18
Claims (4)
に摺動部分を有し、第１部材の摺動部分にＤＬＣコーテ
ィングが施されたミシンにおいて、 前記第１部材のＤＬＣコーティングされた面の表面粗さ
が、前記第２部材の摺動部分の表面粗さよりも小さく、
且つ、第１部材のＤＬＣコーティングされた面が、第２
部材の摺動部分よりも硬いことを特徴とするミシン。1. A sewing machine having a sliding portion between a first member and a second member that move relative to each other, wherein the sliding portion of the first member is DLC coated. The surface roughness of the formed surface is smaller than the surface roughness of the sliding portion of the second member,
In addition, the DLC coated surface of the first member is the second
A sewing machine characterized by being harder than the sliding parts of the members.
第２部材の表面粗さよりも小さいことを特徴とする請求
項１記載のミシン。2. The sewing machine according to claim 1, wherein the surface roughness of the base material of the first member is smaller than the surface roughness of the second member.
０．２ミクロン以上且つ１ミクロン以下であること特徴
とする請求項１または２に記載のミシン。3. The sewing machine according to claim 1, wherein the surface roughness of the DLC coating is 0.2 micron or more and 1 micron or less.
ン以上であることを特徴とする請求項１〜３の何れかに
記載のミシン。4. The sewing machine according to claim 1, wherein the surface roughness of the second member is 1.5 μm or more.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002138182A JP2003326069A (en) | 2002-05-14 | 2002-05-14 | Sewing machine |
| CN 03123841 CN1291094C (en) | 2002-05-14 | 2003-05-14 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002138182A JP2003326069A (en) | 2002-05-14 | 2002-05-14 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003326069A true JP2003326069A (en) | 2003-11-18 |
Family
ID=29699694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002138182A Pending JP2003326069A (en) | 2002-05-14 | 2002-05-14 | Sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003326069A (en) |
| CN (1) | CN1291094C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008096890A1 (en) * | 2007-02-09 | 2008-08-14 | Kabushiki Kaisha Toyota Jidoshokki | Thickness direction thread insertion needle, and method for producing three-dimensional fibrous structure |
| US8530051B2 (en) | 2006-07-31 | 2013-09-10 | Nissan Motor Co., Ltd. | High strength gear, power transmission mechanism using same, and production method for high strength gear |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983281A (en) * | 2019-12-30 | 2020-04-10 | 上海离原环境科技有限公司 | Carbon-based nano composite coating for surface treatment of sewing machine needle rod, preparation method thereof and product applying preparation method |
-
2002
- 2002-05-14 JP JP2002138182A patent/JP2003326069A/en active Pending
-
2003
- 2003-05-14 CN CN 03123841 patent/CN1291094C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8530051B2 (en) | 2006-07-31 | 2013-09-10 | Nissan Motor Co., Ltd. | High strength gear, power transmission mechanism using same, and production method for high strength gear |
| WO2008096890A1 (en) * | 2007-02-09 | 2008-08-14 | Kabushiki Kaisha Toyota Jidoshokki | Thickness direction thread insertion needle, and method for producing three-dimensional fibrous structure |
| JP2008196063A (en) * | 2007-02-09 | 2008-08-28 | Toyota Industries Corp | Thickness direction thread insertion needle and method for producing three-dimensional fibrous structure |
| CN101646816B (en) * | 2007-02-09 | 2011-09-14 | 株式会社丰田自动织机 | Thickness direction thread insertion needle, and method for producing three-dimensional fibrous structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1460741A (en) | 2003-12-10 |
| CN1291094C (en) | 2006-12-20 |
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