200417646 玖、發明說明： L發明所屬之技術領域3 技術領域 本發明涉及例如極力抑制潤滑油供給量的縫幼機及其 5 部件。 背景技術 工業用縫紉機中，爲了提高縫製作業的效率，要求運 轉速度高速化。爲了實現該運轉速度的高速化，必須提高 10 在縫紉機各部分中的滑動部件的滑動部分的耐磨耗性，防 止滑動部件産生發熱膠著。 爲了提高上述滑動部分的耐磨耗性，防止滑動部件産 生發熱膠著，現有技術中採取以下的辦法。例如，對滑動 部分更多地增加潤滑油供給量；對滑動部件的滑動部分實 15 施浸碳處理、淬火及回火等的熱處理，以提高該滑動部分 的硬度；用氮化鈦或碳化鈦等的高硬度陶瓷層覆蓋滑動部 件的表面（例如日本特開平6-71076號公報）；在滑動部分上 塗敷例如二硫化鉬等的固體潤滑油等。 對滑動部分增加潤滑油供給量的現有技術中，有時潤 20 滑油會飛濺到缝紉機外部。例如，往在縫紉機臂的前端部 上下滑動的針棒上增加潤滑油供給量時，隨著針棒的上下 動作，有時潤滑油會飛濺到縫紉機外部。這時，位於縫紉 機臂下方的被縫製物，會被飛濺的潤滑油弄髒。 用熱處理的方法來提高滑動部分硬度的現有技術中， 5 上述滑動部分的硬度比熱 是，僅僅對滑動部分進彳㈣滑動部分義增高。但 所需的耐磨耗性，不#充理’不#付到作爲滑動部分 上述日本特開平二二:運轉速度高速化的要求。 用物理蒸鍍法（簡稱爲PVI^公報記載的現有技術中，是 Deposition)形成陶瓷層。： PVD · Physical Vap〇Ur 有充分的附著強度，‘1、彡二了使該《層對於滑動部件具 450°C以下左右的處理溫卢。^ 3GGC以上、最好WC以上 中的回火溫度、即2〇〇;::亥處理溫度超過了上述熱處理 的形成過程中，作爲母材的、、^°C以下。這樣，在陶竟層 低。由於上述的處理溫度^部件的表面硬度極度地降 這樣，滑動部件的形狀產生^滑動部件因熱應力而變形。 時會大大超過狀的範I ^的變形’其尺寸精度有 塗敷前述固定潤滑油的 塗敷處理溫度，使滑動部件2技術中，在錄時’由於 部件的形狀產生不希望的變/、應力而變形。因此，滑動 過預定的範圍。特別是對於•其尺寸精度㈣會大大超 部件，-旦該滑動部件因熱^機部件中比較薄的高精度 加工進行修正，而成爲不合=而變形時，不能通過後續 處理和塗敷處理，由於上迷二。°。這些利用陶曼層的覆蓋 媒作古 v 的原因，不能將處理溫度設定 =:斤以’得不到充分的附著強度。這樣，由議 私的原因，處理層容易從母材上剝落。 C發明内容J 發明概要 制潤滑油的供給 部件産生發熱膠 爲此，本發明的目的是提供能極力抑 量、提高滑動部分耐磨耗性、能防止滑動 著的縫初機及其部件。 本發明的縫切機部件，具有與其他部件相對滑動的滑 動部分，其特徵在於，利用加卫液中的放電現象，通過把 具有碳化鎢的高硬度成分熔敷在滑動部分上，提高上述滑 動部分的耐磨耗性。 根據本發明，具有與其他部件相對滑動的滑動部分的 縫幼機部件’利用加工液中的放電現象，把具有碳化嫣的 高硬度成分溶敷在滑動部分上，由此，可極力抑制潤滑油 的供給量’從而有效地防止滑動部分的磨耗和産生發熱膠 著0 尤其是’由於利用加工液中的放電現象，使高硬度成 分熔敷在滑動部分上，所以，不必如現有技術那樣提高處 理溫度，可切實地將高硬度成分熔敷在滑動部分上。因此， 與上述現有技術相比，幾乎沒有熱應力作用在縫約機部件 的滑動部分上，不會因熱應力産生變形。由於能把具有碳 化鎢的高硬度成分切實地熔敷在上述滑動部分上，所以， 可防止該高硬度成分脫落。可防止縫紉機部件的形狀産生 不希望的變形，可將其尺寸精度限定在預定的範圍内。 本發明中，其特徵在於，上述高硬度成分，還具有錄 和鉻。 根據本發明，具有碳化鑄的高硬度成分由於還耳有錦^ 和鉻，可提高滑動部分的耐蝕性。這樣，可以更加抑制對 滑動部分的潤滑油供給量。可防止潤滑油隨著縫紉機的動 作而飛濺到縫紉機外部，可防止縫潤滑油弄髒被縫製物。 本發明中，其特徵在於，縫紉機部件作爲彎針機構的 部件使用。 本發明中，其特徵在於，縫紉機部件作爲針棒滑動機 構的部件使用。 本發明的縫紉機，具有相互滑動的2個滑動部件，其特 徵在於，利用加工液中的放電現象，使具有碳化鎢的高硬 度成分溶敷在上述2個滑動部件中的至少一方的滑動部分 上。 根據本發明，縫紉機具有相互滑動的2個滑動部件。利 用加工液中的放電現象，使具有碳化鎢的高硬度成分熔數 在上述2個滑動部件中至少一方的滑動部分上。這樣，滑動 部件可提高滑動部分的对磨耗性’可極力抑制對滑動部分 的潤滑油供給量，從而有效地防止滑動部分的磨耗和産生 發熱膠著。尤其是，利用加工液中的放電現象，使高硬度 成分溶敷在滑動部分上’所以’不必如現有技術那樣地提 南處理溫度’可切實地將南硬度成分溶敷在滑動部分上。 與現有技術相比，在滑動部件的滑動部分上，幾乎不 作用熱應力，不會因熱應力而變形。而且，具有碳化鶴的 高硬度成分，能切實地熔敷在上述滑動部分上，所以，可 防止該高硬度成分脫落。可防止滑動部件的形狀産生不希 望的變形，可將其尺寸精度限定在預定的範圍内。由於上 述的原因，可實現縫紉機的運轉速度高速化。 200417646 圖式簡單說明 對於本發明的目的、特色和優點，可從下面詳細的說 明和附圖中更加瞭解。 附圖說明 5 第1圖是本發明一實施形態之縫紉機的立體圖。 第2圖是表示作爲缝紉機部件之一例的、彎針機構主要 部分的斷面圖。 第3圖是表示作爲縫紉機部件之一例的、彎針機構主要200417646 (1) Description of the invention: Technical field to which the invention belongs 3. Technical Field The present invention relates to a sewing machine and its five components, for example, which suppress the amount of lubricating oil supply as much as possible. BACKGROUND ART In order to improve the efficiency of sewing operations in industrial sewing machines, it is required to increase the operating speed. In order to increase the running speed, it is necessary to improve the abrasion resistance of the sliding part of the sliding member in each part of the sewing machine to prevent the sliding member from generating heat and sticking. In order to improve the abrasion resistance of the sliding portion and prevent the sliding member from generating heat and sticking, the following methods have been adopted in the prior art. For example, increase the amount of lubricating oil supply to the sliding part; apply heat treatment such as carbon treatment, quenching, and tempering to the sliding part of the sliding part to increase the hardness of the sliding part; use titanium nitride or titanium carbide A high-hardness ceramic layer such as Japanese Patent Application Laid-Open No. 6-71076 covers the surface of the sliding member; a solid lubricant such as molybdenum disulfide is applied to the sliding portion. In the conventional technology that increases the amount of lubricating oil supplied to the sliding portion, the lubricating oil may splash to the outside of the sewing machine. For example, if you increase the amount of lubricant supplied to a needle bar that slides up and down on the front end of the sewing machine arm, the lubricant may splash to the outside of the sewing machine as the needle bar moves up and down. In this case, the sewing object located under the arm of the sewing machine may be stained with splashed lubricant. In the prior art in which the hardness of the sliding portion is increased by heat treatment, the specific heat of the sliding portion is higher than that of the sliding portion. However, the required abrasion resistance is not sufficient as the sliding part. Japanese Patent Application Laid-open No. 22: High-speed operation is required. The ceramic layer is formed by a physical vapor deposition method (abbreviated to the prior art described in the PVI ^ publication as Deposition). : PVD · Physical Vap〇Ur has a sufficient adhesion strength, ‘1, 彡, and the treatment of the slide layer with a temperature of about 450 ° C or less for the sliding part. ^ Tempering temperature above 3GGC, preferably above WC, i.e. 2000; :: Heat treatment temperature exceeds ^ ° C, which is the base material, during the formation of the above heat treatment. In this way, the Tao layer is low. Due to the above-mentioned processing temperature, the surface hardness of the component is extremely reduced. As a result, the shape of the sliding member causes the sliding member to deform due to thermal stress. The deformation of the fan will greatly exceed the shape of the shape. Its dimensional accuracy has the coating processing temperature for applying the above-mentioned fixed lubricating oil, so that during the recording of the sliding member 2 technology, 'unexpected changes due to the shape of the component /, Deformation under stress. Therefore, it slides over a predetermined range. Especially for • its dimensional accuracy will greatly exceed the component,-once the sliding part is modified due to the thinner high-precision processing in the thermal machine parts, when it is deformed, it cannot be processed by subsequent processing and coating, Thanks for the fans. °. For these reasons, the covering medium of the Taoman layer is used as the ancient v, and the processing temperature cannot be set. In this way, for reasons of privacy, the treatment layer is likely to peel off from the base material. C Summary of the invention J Summary of the invention The lubricating oil supply part generates heat-generating glue. Therefore, an object of the present invention is to provide a sewing machine and its components that can suppress the friction as much as possible, improve the abrasion resistance of sliding parts, and prevent sliding. The sewing machine part of the present invention has a sliding part that slides relative to other parts, and is characterized in that by utilizing a discharge phenomenon in the guard solution, the high-hardness component having tungsten carbide is welded on the sliding part to improve the sliding Partial abrasion resistance. According to the present invention, a sewing machine part having a sliding portion that slides relative to other components uses a discharge phenomenon in a processing fluid to apply a high-hardness component with carbonized carbon to the sliding portion, thereby suppressing the lubricating oil as much as possible. The supply amount 'effectively prevents the abrasion of the sliding part and the generation of hot glue. In particular,' the high hardness component is deposited on the sliding part due to the discharge phenomenon in the processing fluid, so it is not necessary to increase the processing temperature as in the prior art. , Can reliably weld high hardness components on the sliding part. Therefore, compared with the prior art described above, almost no thermal stress is applied to the sliding portion of the sewing machine member, and no deformation is caused by the thermal stress. Since the high-hardness component having tungsten carbide can be reliably welded to the sliding portion, the high-hardness component can be prevented from falling off. The shape of the sewing machine parts can be prevented from being deformed undesirably, and the dimensional accuracy can be limited to a predetermined range. The present invention is characterized in that the high-hardness component further contains chromium. According to the present invention, the high-hardness component having a carbonized cast can improve the corrosion resistance of the sliding portion due to the presence of bromine and chromium. This makes it possible to further suppress the amount of lubricating oil supplied to the sliding portion. It can prevent the lubricant from splashing to the outside of the sewing machine as the sewing machine moves, and it can prevent the sewing lubricant from staining the material to be sewn. In the present invention, the sewing machine part is used as a part of a looper mechanism. In the present invention, the sewing machine part is used as a part of a needle bar sliding mechanism. The sewing machine of the present invention has two sliding members that slide with each other, and is characterized in that a high hardness component having tungsten carbide is applied to at least one of the two sliding members by utilizing a discharge phenomenon in a working fluid. . According to the present invention, the sewing machine has two sliding members that slide with each other. By utilizing the discharge phenomenon in the working fluid, the melting number of the high hardness component having tungsten carbide is applied to at least one of the two sliding members. In this way, the sliding member can improve the abrasion resistance of the sliding portion ', and the amount of lubricating oil supplied to the sliding portion can be suppressed as much as possible, thereby effectively preventing the abrasion of the sliding portion and the generation of heat build-up. In particular, a high hardness component is applied to the sliding portion by using a discharge phenomenon in the working fluid. Therefore, the southern hardness component can be reliably applied to the sliding portion without the need to raise the processing temperature as in the prior art. Compared with the prior art, thermal stress is hardly applied to the sliding portion of the sliding member, and it is not deformed by the thermal stress. In addition, since the high-hardness component having the carbonized crane can be reliably welded to the sliding portion, the high-hardness component can be prevented from falling off. The shape of the sliding member can be prevented from being undesirably deformed, and its dimensional accuracy can be limited to a predetermined range. For the reasons described above, the speed of the sewing machine can be increased. 200417646 BRIEF DESCRIPTION OF THE DRAWINGS The objects, features and advantages of the present invention can be better understood from the following detailed description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sewing machine according to an embodiment of the present invention. Fig. 2 is a sectional view showing a main part of a looper mechanism as an example of a sewing machine part. Fig. 3 shows the main part of a looper mechanism as an example of a sewing machine part.
部分的斷面圖。 10 第4圖是表示作爲縫紉機部件之另一例的、針棒的動作 的斷面圖。 第5圖是本發明另一實施形態之平式連鎖縫缝紉機的 立體圖。 第6圖是用包含彎針棒（…一八棒)軸線的假想平面，將 15 平式連鎖縫紉機的彎針驅動裝置的主要部分剖開的斷面 圖。 L實施方式3 較佳實施例之詳細說明 下面，參照附圖詳細說明本發明的實施例。 20 第1圖是本發明一實施形態之缝紉機1A的立體圖。例如 作爲包縫縫幼機的縫幼機1A，備有縫幼機架50、橫板51和 蓋部件52，橫板51把設在該缝紉機架50上的縫紉機部件覆 蓋住。上述蓋部件52也稱爲前開蓋。這些橫板51和蓋部件 52，分別可自由開閉地設在缝紉機架50上。在把橫板51或 9 Μ 的狀態τ ’可進行縫匆機部件的清掃和調 ==架50上，設有由若干個_部件構成的後 广: 3在縫紉機架50的縫紉機頭50a上，設有上下 在復動作的後述針棒16，在該針棒16的前端部保持著針4。 下面，把針4的驅動方向—方C1稱爲上方Q，把針4的驅動 方向另一方C2稱爲下方C2。 又在上述縫匆機1A上的若干個縫幼機部件之中，具有 …、他縣相對崎滑動的滑動部分的肋機部件，提高 了滑動部分的耐磨耗性。利用加I液中的放電現象，把例 10 =具有碳化的高硬度成分炫敷在滑動部分上。這樣，提 南了上述滑動部分的耐磨耗性。 /、體地"兒，把作爲溶敷物件的金屬製縫幼機部件和電 極，隔開預定小距離地相向配置在加工液、料電性碳化 氫系加工油中。另外，設置脈衝電源，把脈衝電源的負端 15子與電極側電連接，把脈衝電源的正端子與縫切機部件側 電連接。 上述電極所採用的金屬，由碳化鎢構成。但並不限定 疋石反化鎢。電極所採用的金屬，例如可以混合鈦、碳化鈦、 碳化鈮、碳化鈕、碳化錘、碳化釩、碳化鉬、氮化鉻、氮 20化矽、氮化鈕、氮化鈦、氮化錘、氮化鈮、氮化釩、矽化 鉻、矽化鍅、矽化鎢、矽化鈕、矽化鈦、矽化鈮、矽化鉬、 领化鉻、硼化鍅、硼化鈕、硼化鎢、硼化鈦、硼化銳、硼 化鉬、和硼化鑭中的至少一個金屬來壓縮成形，成爲半燒 、、、口狀悲來使用’加工液也不限定是碳化氮系加工油。 10 200417646 這樣，在加工液中，從縫紉機部件側即正側，産生流 向負側電極的南電流密度的電子流。電極中的電子到達的 部位成爲高溫，電極炫出，放出到消耗的電極間。這時， 面臨電極的縫紉機部件的滑動部分，成爲半熔融狀態。 加工液被放電的熱和電子流分解。於是，加工液的構 成元素即石反素成分’産生負離子化。上述負離子和熔出的 電極的構成成分化學結合，這樣，生成負離子化了的高硬 度成分。生成的高硬度成分的一部分，依次浸透並蓄積到 半炫融狀態的滑動部分内。 最後，在上述滑動部分的一表面部，形成例如厚度約 舄〇//m以上、20//m以下的硬化覆膜。面臨著前述硬化覆 膜的滑動部分的内部，形成深約5"m以上、15//m以下的 硬化改質層。這些硬化覆膜和硬化改質層相當於高硬度成 分。上述硬化改質層形成後，解除放電現象，機械性除去 15硬化覆膜。 本案申請人，對各種金屬材料做成的縫紉機部件、和 在上述縫紉機部件上熔敷了具有碳化鎢高硬度成分的部 件，用同一條件，實施了威氏硬度試驗。從試驗結果可知， 熔敷了高硬度成分的縫紉機部件，與未熔敷高硬度成分的 2〇同一材質的縫紉機部件相比，可得到約1.8倍以上、2.4件以 下的威氏硬度。 弟2圖和弟3圖是表示作爲縫纟刀機部件一例的、彎針機 構53主要部分的斷面圖。該彎針機構53，被收容在上述縫 紉機1A的縫紉機架5〇内，在打開蓋部件兄的狀態下， 匕露 11 200417646 出到縫紉機1A的外部。上述彎針機構53，備有彎針導引金 屬件11、彎針導引件12、彎針棒9、上彎針10、彎針曲柄13 和彎針曲柄銷14、彎針轴15。 彎針棒9,是在縫紉機1Α的針板上使上彎針10動作的圓 5 杆狀部件。彎針導引金屬件11，用若干個螺栓固定在缝紉 機架50上，作爲彎針棒9的支承部件。在彎針導引金屬件11 的前端部，支承著彎針導引件12。該彎針導引件12形成爲 略圓柱形。彎針導引件12，其旋轉軸線保持爲略水平，可 轉動地被嵌入支撐在彎針導引金屬件11的前端部。本實施 10 形態中，“略圓柱形”包含了“圓柱形”，“略水平”包含了“水 平，，〇 在上述彎針導引件12上，形成沿徑向貫通的導引孔 12a。彎針棒9，在穿過導引孔12a的狀態下，可沿其縱長方 向自由滑動。在彎針棒9的縱長方向一端部（上端部），連接 15 著上彎針10。在彎針棒9的縱長方向另一端部（下端部），通 過彎針曲柄13和彎針曲柄銷14連接著彎針軸15。上述彎針 軸15，借助來自圖未示的下軸的傳動，在預定的角度範圍 内反復轉動。與該反復轉動相應地，彎針曲柄13繞著平行 上述軸線方向的軸線方向擺動。 20 借助上述彎針曲柄13的擺動，彎針棒9的下端部被推 上、拉下。這樣，彎針棒9高速地在彎針導引件12的導引孔 12a内滑動，同時隨著彎針導引件12的轉動而擺動。因此， 彎針棒9在第2圖所示狀態與第3圖所示狀態之間反復動 作。借助該彎針棒9的反復動作，上彎針10在第2圖所示位 12 200417646 置與第3圖所示位置之間反復動作。 在上述彎針棒9上，作用著對導引孔12a内周面的滑動 阻力，同時也作用著隨著擺動而産生的彎矩。本實施方式 中，例如，在成爲相對導引孔12a的内周面滑動的滑動部分 5 即彎針棒9的外周面上，熔敷具有碳化鎢的高硬度成分K1。 這樣，可以減輕作用在彎針棒9上的上述滑動阻力和彎矩。 可以防止在彎針棒9與導引孔12a的開口緣接觸部上容 易産生的磨耗和發熱膠著。另外，也可以不在彎針棒9的外 周面熔敷高硬度成分K1，而是在導引件12的至少滑動部分 10 即導引孔12a上，熔敷具有碳化鎢的高硬度成分K1。這樣也 能減輕上述滑動阻力和彎矩，並且，可防止在彎針棒9與導 弓丨孔12a的開口緣接觸部上容易産生的磨耗和發熱膠著。 另外，也可以在導引金屬件11的相對導引件12外周面 的滑動部分11a上，熔敷具有碳化鎢的高硬度成分K1。這 15 樣，可以減輕作用在導引件12與彎針導引金屬件11之間的 滑動阻力。另外，也可以在彎針曲柄銷14的外周面、和彎 針棒9的相對該彎針曲柄銷14外周面的滑動部分的至少一 方上，熔敷具有碳化鎢的高硬度成分K1。這樣，可以減輕 作用在彎針曲柄銷14與彎針棒9之間的滑動阻力。 20 在彎針導引件12中，也可以在具有垂直於旋轉軸線平 面的一對表面部12b上，熔敷具有碳化鎢的高硬度成分K1。 這樣，可以減輕作用在彎針導引件12的上述表面部12b與在 該表面部12b上滑動的其他部件之間的滑動阻力。 第4圖是表示缝紉機部件之另一例的針棒16的動作的 13 斷面圖。Μ針棒16設在上述縫切的縫城頭施上。針 棒16 ’上下被分別配置在襯套17、18導引而上下活動。概 套17喪接在肋卿5_上壁19卜襯套18錢在縫匆機 50a的下壁2G中。借助·襯套17、18，針棒ι6在沿其縱長 方向分開的2個位置被支承。 在襯套17、18之間，在針棒16的縱長方向巾間附近部， 附設著針棒抱(針棒抱⑽。針棒16通過包含該針棒抱21 的公知傳動機構’與缝紉機架50内部的圖未示的上軸連 接。因此，針棒16與上述上轴相應地，被上下的概套17、 18導引而上下活動。 在針棒16的下端部，通過針失22安裝著針4。針棒Μ 以比較長的行程Η上下運動，從而使針4上下運動。隨著該 上下運動，針棒16的外周面相對於上下襯套ΐ7、ΐ8的内周 面滑動。本實施形態中，名、、取紅#、 在^動邛分即針棒16的外周面， 熔敷了具有碳化鎢的高硬度成分K1。 這樣，可提高上述滑動部分的耐磨耗性。可以減輕作 用在針棒16襯套17、18之間的滑動阻力。因此，可以提高 針棒16相對於上下襯套17、18的滑動速度，可 機1A的運轉速度高速化。換言之，可以消除針棒16和概套 17、18的磨耗和發熱膠著，可以使運轉速度高速化。 另二：可以代替在針棒16的外周面溶敷高硬度成分 K卜而在襯套17、18的至少滑動部分即内周面上，紐且 有碳化鎢的高硬度成分K1。g么 針㈣咖Γ:广· 叫祕者，貫現縫劫機1A的運轉速 200417646 度向速化。 就潤滑劑而言，本實施形態中，不像現有技術中那樣 增加對針棒16的潤滑油供給量，而是只對例如滑動部分塗 敷薄薄的潤滑脂，滑動部分可得到良好的潤滑狀態。因此， 5可實現縫紉機1A的運轉速度高速化。 另外，也可以採用稱爲燒結含油金屬的、在多孔質中 含有潤滑油的材料來形成襯套17、18。這時，也不必增加 對針棒16的潤滑油供給量，滑動部分可得到良好的潤滑狀 態。因此，可實現縫紉機1A的運轉速度高速化，另外，潤 1〇滑油也不會隨著針棒16的上下運動而飛濺到縫紉機1A外 部。在縫紉機頭50a下方的被縫製物不會被飛濺的潤滑油弄 鱗。 利用加工液中的放電現象，把具有碳化鎢的高硬度成 分K1熔敷在缝紉機部件的滑動部分上後，也有時在上述滑 5動部分上後續加工形成若干油槽或若干個油孔。然後，在 上述滑動部分上，薄薄地塗敷一層例如潤滑脂，再擦栻乾 淨，潤滑脂就被保持在油槽或油孔内，滑動部分可長期保 持良好的潤滑狀態。這樣，把高硬度成分反丨熔敷在縫紉機 部件的滑動部分上後，也有時對上述高硬度成分K1實施各 20種便於潤滑的後續加工。 根據上述的縫紉機1A，具有與其他部件相對滑動的滑 動部分的縫紉機部件，利用加工液中的放電現象，把具有 碳化鎢的高硬度成分K1溶敷在滑動部分上。這樣，縫勿機 部件，可提高上述滑動部分的耐磨耗性，可極力抑制潤滑 15 200417646 油的供給量，可有效地防止滑動部分的磨耗和産生發熱膠 著。 由於利用加工液中的放電現象，把高硬度成分熔敷在 滑動部分上，所以，不必像現有技術中那樣提高處理溫度， 5 可切實地將高硬度成分K1熔敷在滑動部分上。因此，與現 有技術相比，在縫紉機部件的滑動部分上，幾乎不作用熱 應力，也不會因熱應力而産生變形。上述彎針棒9、彎針曲 柄銷14、針棒16和圖未示的針棒連杆銷等薄的高精度部件 中，由於在上述熔敷時幾乎不作用熱應力，所以，它們的 10 尺寸精度不會大大超出預定的範圍，可防止不合格品的産 生。而且，由於能把高硬度成分K1切實地熔敷在上述滑動 部分上，所以，可以防止該高硬度成分K1從作爲母材的縫 紉機部件上脫落。 這樣，由於熔敷在縫紉機部件滑動部分上的高硬度成 15 分K1不會脫落，所以，本實施形態的縫紉機1A中，與塗敷 固體潤滑劑的現有技術相比，可抑制因滑動摩擦而引起的 磨削粉。 可以防止縫紉機部件的形狀産生不希望的變形，可以 將其尺寸精度限定在預定的範圍内。即使縫紉機部件的尺 20 寸精度稍稍超出了預定範圍，通過對該縫紉機部件實施後 續加工等，也能簡單地將其尺寸精度限定在預定範圍内。 綜上所述，可以實現縫紉機1A的運轉速度高速化。 由於把高硬度成分K1熔敷在縫紉機部件的滑動部分 上，所以，根據不同的縫紉機部件，只要在其一部分上熔 16 敷南硬度成分K1，就可以、去 就』Μ建到上述的效果。換言之，只要 在上述_機料的—部分上，賴高硬度齡K1，就可 2提高歸動部分的㈣_，所以，祕敷時，可抑制 屯極的/肖耗。因此’可以減低每個縫域部件的製造成本。 10 第5圖是本發gg另施形態之平式連鎖縫縫初機丄的 立體圖第6圖是用包含曾針棒32轴線的假想平面，將平式 連鎖縫縫匆機1的·曾針驅動裝置的主要部分剖開的斷面 圖。有時把上述平式連鎖縫縫紉機1僅稱爲縫紉機1。縫紉 機1備有機身5。機身5具有箱體的功能，即在機身5内收容 著驅動針4等的驅動機構。上述機身5具有頭6、柱7和臂8。 在頭6上设有針板2。柱7從頭6的一端部朝上方(^立設著。 臂8從柱7的一端部沿著頭6平行地延伸。 在機身5内收容著彎針驅動裝置31。彎針驅動裝置31 使上述縫紉機1的圖未示的彎針與針4的上下運動同步動 15 作。上述彎針通過圖未示的彎針保持件（瓜一六水小夕、')，被 安裝在彎針棒32的縱長方向一端部。 彎針驅動裝置31，備有驅動裝置本體33、彎針棒32、 彎針進退機構34、使彎針棒32繞其軸線方向擺動的圖未示 的彎針擺動機構、擺動力傳遞機構35。驅動裝置本體33， 20 備有彎針導引件36、支承該彎針導引件36的支承筒37、38。 支承筒37、38配置在同一軸線上。支承筒37、38被固定地 支承在缝紉機1的機身5上，彎針導引件36可繞支承筒37、 38的轴線方向擺動。 彎針棒32插入一方的支承筒37的貫通孔37a中，並可朝 17 200417646 著上述軸線方向自由滑動。該彎針棒32的縱長方向另一端 部，從支承板36a朝軸線方向一方突出。在上述彎針棒· 縱長方向的另一端部，固定著滑塊安裝台39等。 彎針進退機構34，備有彎針軸41和彎針臂“。被支承 5在彎針導引件36上的彎針棒32中，在其縱長方向另一端部 的針驅動方向上，設有彎針偏卜 轴線方向，與彎針棒32的軸線方向和針驅動方向略直交。 本實施形態中，“略直交，，包含了“直交，，。 在彎針軸41的縱長方向一端部，外裝著彎針臂“。該 10彎針臂42被牢固地安裝在彎針軸41上。在彎針臂“中，在 彎針軸41的半徑方向外方側端部，付設著支架42&。支架42& 可滑動地被保持在彎針棒32的縱長方向另一端部上。彎針 軸41通過圖未示的曲柄機構與圖未示的下軸連動連接。彎 針軸41隨著上述下轴的旋轉，繞彎針軸41的軸線方向擺 15動。彎針臂42與該彎針軸41 一起擺動，由此可滑動地被保 持在支架42a上的彎針棒32，在軸線方向的一方與另一方之 間被進退驅動。 擺動力傳遞機構35，具有彎針導引件36和滑塊44。在 ’、4針導引件36上，形成包含狹縫45的導引孔46。上述導引 20 孔46沿著平行於彎針棒32軸線方向的方向延伸。導引孔46 的斷面爲略V字形，可與該導引孔46卡合的滑塊44,與該導 引孔46卡合著。上述滑塊44的一部分，通過狹縫45而被固 定在滑塊安裝台39上。 通過這樣的構造，彎針棒32借助滑塊44的沿導引孔46 18 的滑動，在上述轴線方向被導引，同日寺，滑塊44約束住彎 針棒32相對於$針導彳|件36的相對轉動。換言之，借助與 導引孔46卡合的滑塊44，彎針導引件36的擺動力被傳遞到 彎針棒32。 在上述彎針驅動裝置31中的、例如後述滑動部件的滑 動刀上，溶敷了在上述實施例中已經說明瞭的具有碳化 鎢的呵硬度成分Κ1。這樣，可提高上述滑動部分的耐磨耗 1*生極力抑制潤滑油的供給量，從而有效地防止滑動部分 的磨耗和産生發熱膠著。具有與上述實施形態大致同樣的 效果0 具體地說，在彎針棒32的外周面和支承筒37的相對於 •幫針棒32外周面滑動的滑動部分37a中的至少一方上，熔數 具有後化鎢的高硬度成分K1。另外，在與導引孔46相卡合 的滑塊44的表面部和彎針導引件36的相對於滑塊44表面部 /肾動的滑動部分中的至少一方上，熔敷具有碳化鎢的高硬 度成分K1。在其他上述滑動部分以外的滑動部分上，也可 以熔數上述高硬度成分K1。 本發明的其他實施形態中’高硬度成分K1對滑動部分 的您數，不限定於上述包含禽針棒9的彎針棒9附近部分、 和包含針棒16的針棒16附近部分。例如，也可以在與針棒 抱21連接的圖未示的針棒環（針棒U >夕）的内周面和内骏 在該針棒環内周面的針棒環銷的外周面中的至少一方上， 熔數具有碳化鎢的高硬度成分κι。這樣，可以減輕作用在 針棒環與針棒環銷之間的滑動阻力。因此，可以提高針棒 200417646 16的滑動速度，更進一步實現縫紉機的運轉速度高速化。 把高硬度成分K1熔敷在縫紉機部件整體上後，有時， 再用例如機械加工等方式，除去熔敷在該滑動部分以外的 部分上的高硬度成分K1。本實施形態中，是對縫紉機部件 5 的滑動部分全面熔敷了高硬度成分K1，但是，也可以沿著 滑動方向隔開適當間隔地熔敷高硬度成分K1。這時，在縫 紉機運轉時和運轉停止時的縫紉機部件母材與高硬度成分 K1之間作用著熱膨張差，可以將由該熱膨張差引起的高硬Sectional view of part. 10 Fig. 4 is a sectional view showing the operation of a needle bar as another example of a sewing machine part. Fig. 5 is a perspective view of a flat interlock sewing machine according to another embodiment of the present invention. Fig. 6 is a cross-sectional view of a main part of a looper driving device of a 15-flat interlock sewing machine using an imaginary plane including an axis of a looper bar (... 18 bar). L Embodiment 3 Detailed Description of Preferred Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 20 FIG. 1 is a perspective view of a sewing machine 1A according to an embodiment of the present invention. For example, a baby sewing machine 1A which is an overlock sewing baby machine is provided with a baby sewing machine 50, a horizontal plate 51, and a cover member 52. The horizontal plate 51 covers a sewing machine member provided on the sewing machine 50. The cover member 52 is also referred to as a front open cover. These horizontal plates 51 and cover members 52 are provided on the sewing frame 50 so as to be freely opened and closed, respectively. In the state τ 'of the horizontal plate 51 or 9 Μ, cleaning and adjustment of the sewing machine parts can be performed. == The frame 50 is provided with a number of components: 3 on the sewing head 50a of the sewing frame 50 A needle bar 16 to be described later that moves up and down is provided, and the needle 4 is held at the tip of the needle bar 16. Hereinafter, the driving direction of the needle 4-square C1 is referred to as the upper Q, and the other driving direction of the needle 4 C2 is referred to as the lower C2. Furthermore, among the several sewing machine parts on the sewing machine 1A, the rib machine part having a sliding part that slides relative to other parts of the county, improves the abrasion resistance of the sliding part. Utilizing the discharge phenomenon in the I-addition solution, Example 10 = high hardness component with carbonization was applied on the sliding part. In this way, the abrasion resistance of the sliding portion is improved. In the body, the metal sewing machine parts and electrodes, which are the objects to be deposited, are placed in a processing fluid and an electrically-conductive hydrocarbon-based processing oil facing each other at a predetermined small distance. In addition, a pulse power source is provided, and the negative terminal 15 of the pulse power source is electrically connected to the electrode side, and the positive terminal of the pulse power source is electrically connected to the sewing machine part side. The metal used for the electrodes is made of tungsten carbide. It is not limited to vermiculite for tungsten. The metal used in the electrode can be, for example, titanium, titanium carbide, niobium carbide, carbide button, carbide carbide, vanadium carbide, molybdenum carbide, chromium nitride, silicon nitride 20, nitride button, titanium nitride, hammer nitride, Niobium nitride, vanadium nitride, chromium silicide, hafnium silicide, tungsten silicide, silicon silicide button, titanium silicide, niobium silicide, molybdenum silicide, chromium halide, hafnium boride, boron button, tungsten boride, titanium boride, boron At least one metal of Huarui, molybdenum boride, and lanthanum boride is compression-molded to form a semi-burned, hardened, and mouth-shaped, and the processing fluid is not limited to a nitrogen carbide-based processing oil. 10 200417646 In this way, in the processing fluid, a current of electrons having a south current density flowing to the negative electrode is generated from the positive side of the sewing machine component side. The portion where the electrons in the electrode reach becomes high temperature, the electrode is dazzled, and is released between the consumed electrodes. At this time, the sliding portion of the sewing machine member facing the electrode is in a semi-fused state. The working fluid is decomposed by the discharged heat and electron flow. As a result, the lignin component, which is a constituent element of the processing fluid, is negatively ionized. The negative ions and the constituent components of the molten electrode are chemically combined with each other, so that a negative ionized high-hardness component is generated. A part of the generated high-hardness component penetrates and accumulates in the sliding part in a semi-melted state in order. Finally, a hardened film having a thickness of, for example, about 100 // m to 20 // m is formed on one surface portion of the sliding portion. The inside of the sliding portion facing the hardened film forms a hardened and modified layer having a depth of about 5 m or more and 15 / m or less. These hardened coatings and hardened and modified layers correspond to high hardness components. After the hardened and modified layer is formed, the discharge phenomenon is eliminated, and the hardened film is mechanically removed. The applicant in this case performed a Vickers hardness test under the same conditions on sewing machine parts made of various metallic materials and parts having a high hardness component of tungsten carbide deposited on the sewing machine parts. From the test results, it can be seen that, compared with sewing machine parts of the same material that have not been welded with high-hardness components, 20 can achieve a Vickers hardness of about 1.8 times or more and 2.4 or less. Figures 2 and 3 are cross-sectional views showing the main part of the looper mechanism 53 as an example of a part of a sewing machine. This looper mechanism 53 is housed in the sewing machine 50 of the above-mentioned sewing machine 1A, and when the cover member is opened, it is exposed to the outside of the sewing machine 1A. The looper mechanism 53 includes a looper guide metal member 11, a looper guide 12, a looper rod 9, an upper looper 10, a looper crank 13, a looper crank pin 14, and a looper shaft 15. The looper bar 9 is a circular rod-shaped member that moves the upper looper 10 on the throat plate of the sewing machine 1A. The looper guide metal member 11 is fixed to the sewing frame 50 with a plurality of bolts and serves as a support member for the looper bar 9. A looper guide 12 is supported at a front end portion of the looper guide metal member 11. The looper guide 12 is formed in a substantially cylindrical shape. The looper guide 12 has its rotation axis kept slightly horizontal, and is rotatably fitted and supported at the front end of the looper guide metal 11. In the form of the tenth embodiment, “slightly cylindrical” includes “cylindrical”, and “slightly horizontal” includes “horizontal”, and the looper guide 12 is formed with a guide hole 12a penetrating in the radial direction. The looper rod 9 can slide freely in the longitudinal direction while passing through the guide hole 12a. One end (upper end) of the looper rod 9 in the longitudinal direction is connected to the upper looper 10. The other end (lower end) of the looper rod 9 in the longitudinal direction is connected to a looper shaft 15 via a looper crank 13 and a looper crank pin 14. The looper shaft 15 is driven by a lower shaft (not shown) Rotate repeatedly within a predetermined angle range. Corresponding to this repeated rotation, the looper crank 13 swings about an axial direction parallel to the above-mentioned axis direction. 20 With the swing of the looper crank 13, the lower end portion of the looper rod 9 is swung. Push up and down. In this way, the looper bar 9 slides in the guide hole 12a of the looper guide 12 at high speed, and swings as the looper guide 12 rotates. Therefore, the looper bar 9 Repeated operation between the state shown in Figure 2 and the state shown in Figure 3. With this looper rod 9 The upper looper 10 is repeatedly operated between the position 12 200417646 shown in Fig. 2 and the position shown in Fig. 3. The looper bar 9 acts on the sliding resistance of the inner peripheral surface of the guide hole 12a. At the same time, the bending moment caused by the swing also acts. In this embodiment, for example, the outer peripheral surface of the looper rod 9 which is a sliding portion 5 that slides on the inner peripheral surface of the guide hole 12a is welded with The high hardness component K1 of tungsten carbide. In this way, the above-mentioned sliding resistance and bending moment acting on the looper rod 9 can be reduced. It is possible to prevent abrasion and easy occurrence of contact between the looper rod 9 and the opening edge of the guide hole 12a. Heat generation. In addition, instead of welding the high-hardness component K1 on the outer peripheral surface of the looper rod 9, the high-hardness component with tungsten carbide may be deposited on at least the sliding portion 10 of the guide 12, that is, the guide hole 12a. K1. This can also reduce the above-mentioned sliding resistance and bending moment, and can prevent abrasion and heat generation that easily occur at the contact portion between the looper rod 9 and the opening edge of the guide bow 丨 hole 12a. In addition, the guide metal can also be used. Outer peripheral surface of the relative guide 12 of the piece 11 On the sliding portion 11a, a high-hardness component K1 having tungsten carbide is deposited. In this way, the sliding resistance acting between the guide 12 and the looper guide metal 11 can be reduced. In addition, it can also be applied to the looper A high-hardness component K1 having tungsten carbide is deposited on at least one of the outer peripheral surface of the crank pin 14 and the sliding portion of the looper rod 9 with respect to the outer peripheral surface of the looper crank pin 14. This can reduce the effect on the looper crank. Sliding resistance between the pin 14 and the looper bar 9. 20 In the looper guide 12, a pair of surface portions 12b having a plane perpendicular to the rotation axis plane may be welded with a high hardness component K1 having tungsten carbide In this way, the sliding resistance between the above-mentioned surface portion 12b of the looper guide 12 and other members sliding on the surface portion 12b can be reduced. Fig. 4 is a sectional view 13 showing the operation of the needle bar 16 as another example of a sewing machine part. The M needle bar 16 is provided on the seam head of the seam cut. The needle bar 16 'is guided up and down by the bushes 17, 18, respectively, and moves up and down. Almost 17 sets are connected to the top 5 of the rib 5_ 19 bushes 18 18 in the lower wall 2G of the sewing machine 50a. With the bushes 17, 18, the needle bar 6 is supported at two positions separated in the longitudinal direction. Between the bushes 17 and 18, a needle bar holder (needle bar holder) is attached to the vicinity of the towel bar in the longitudinal direction of the needle bar 16. The needle bar 16 is connected to the sewing machine through a known transmission mechanism including the needle bar holder 21. The upper shaft (not shown) inside the frame 50 is connected. Therefore, the needle bar 16 is guided by the upper and lower sleeves 17 and 18 to move up and down corresponding to the upper shaft. At the lower end of the needle bar 16, a needle loss 22 is passed through the needle. The needle 4 is attached. The needle bar M moves up and down with a relatively long stroke Η, thereby moving the needle 4 up and down. With this vertical movement, the outer peripheral surface of the needle bar 16 slides relative to the inner peripheral surfaces of the upper and lower bushes ΐ7 and ΐ8. In the embodiment, the high-hardness component K1 having tungsten carbide is deposited on the outer peripheral surface of the needle bar 16 which is the name, and take red #, and the wear resistance of the sliding portion can be improved. The sliding resistance acting between the bushes 17 and 18 of the needle bar 16 is reduced. Therefore, the sliding speed of the needle bar 16 relative to the upper and lower bushes 17 and 18 can be increased, and the operating speed of the machine 1A can be increased. In other words, the needle can be eliminated. The wear and heat of the stick 16 and the sleeves 17, 18 can cause the running speed The other is that instead of dissolving the high hardness component Kb on the outer peripheral surface of the needle bar 16, at least the sliding part of the bushings 17, 18, that is, the inner peripheral surface, contains a high hardness component K1 of tungsten carbide. g Mod Needle ㈣ Γ: The wide-calling secreter has realized that the speed of the sewing machine 1A has been increased to 200417646 degrees. As far as the lubricant is concerned, in this embodiment, the needle rod 16 is not added as in the prior art. The amount of lubricating oil is only applied to the sliding part with a thin layer of grease, for example. The sliding part can be well lubricated. Therefore, 5 can achieve a high speed of the sewing machine 1A. In addition, it can also be called sintering The bushings 17, 18 are formed of an oil-containing metal and a porous lubricant-containing material. At this time, it is not necessary to increase the amount of lubricant supplied to the needle bar 16, and the sliding portion can be well lubricated. Therefore, a sewing machine can be realized. The running speed of 1A is increased. In addition, lubricating oil will not splash out of the sewing machine 1A with the up and down movement of the needle bar 16. The sewing object under the sewing machine head 50a will not be scaled by the splashed lubricating oil. . After the high-hardness component K1 with tungsten carbide is deposited on the sliding part of the sewing machine part by using the discharge phenomenon in the processing fluid, there are sometimes subsequent processing on the sliding part to form several oil grooves or oil holes. Then, On the sliding part, apply a thin layer of grease, for example, and wipe it clean. The grease is held in the oil groove or oil hole, and the sliding part can maintain a good lubrication state for a long time. After welding to the sliding part of the sewing machine part, the above-mentioned high hardness component K1 may also be subjected to 20 types of subsequent processing for easy lubrication. According to the above-mentioned sewing machine 1A, a sewing machine part having a sliding part sliding relative to other parts is processed. The discharge phenomenon in the liquid dissolves the high hardness component K1 with tungsten carbide on the sliding part. In this way, sewing machine parts can improve the abrasion resistance of the sliding portion, and can effectively suppress the lubrication. 15 200417646 The amount of oil supply can be effectively prevented, and the sliding portion can be effectively prevented from abrasion and heat generation. Since the high-hardness component is deposited on the sliding portion by the discharge phenomenon in the working fluid, it is not necessary to raise the processing temperature as in the prior art. 5 The high-hardness component K1 can be reliably deposited on the sliding portion. Therefore, compared with the prior art, thermal stress is hardly applied to the sliding portion of the sewing machine part, and deformation is not caused by the thermal stress. Among the thin high-precision parts such as the above-mentioned looper rod 9, looper crank pin 14, needle rod 16, and a not-shown needle rod link pin, since the thermal stress is hardly applied during the above welding, their 10% The dimensional accuracy will not greatly exceed the predetermined range, which can prevent the occurrence of non-conforming products. Furthermore, since the high-hardness component K1 can be reliably welded to the sliding portion, the high-hardness component K1 can be prevented from falling off from a sewing machine part as a base material. In this way, since the high hardness welded to the sliding part of the sewing machine component is 15 minutes and K1 does not fall off, the sewing machine 1A of this embodiment can suppress sliding friction due to sliding friction compared with the conventional technology of applying a solid lubricant. Caused by grinding powder. The shape of the sewing machine parts can be prevented from being deformed undesirably, and the dimensional accuracy can be limited to a predetermined range. Even if the 20-inch accuracy of the sewing machine part is slightly outside the predetermined range, the dimensional accuracy of the sewing machine part can be easily limited to the predetermined range by performing subsequent processing or the like. In summary, the operation speed of the sewing machine 1A can be increased. Since the high-hardness component K1 is welded to the sliding part of the sewing machine part, depending on the sewing machine part, as long as 16 parts of the south-hardness component K1 are melted on the part, the above effects can be achieved. In other words, as long as the high hardness age K1 is used in the above-mentioned part of the machine, the ㈣_ of the returning part can be increased. Therefore, during the secret application, the pole / shaw consumption can be suppressed. Therefore 'can reduce the manufacturing cost of each seam area component. 10 Fig. 5 is a perspective view of the flat interlocking stitching machine with another form of the present gg. Fig. 6 is an illustration of the flat interlocking stitching machine 1 using the imaginary plane including the 32 axis of the needle bar A cross-sectional view of a main part of the needle driving device. The aforementioned flat interlock sewing machine 1 may be simply referred to as a sewing machine 1. The sewing machine 1 has a body 5. The main body 5 has a function of a case, that is, a driving mechanism such as a driving needle 4 is housed in the main body 5. The above-mentioned fuselage 5 has a head 6, a pillar 7, and an arm 8. A needle plate 2 is provided on the head 6. The post 7 is positioned upward from one end of the head 6. The arm 8 extends parallel to the head 6 from one end of the post 7. The looper driving device 31 is housed in the body 5. The looper driving device 31 makes The looper (not shown) of the sewing machine 1 operates in synchronization with the vertical movement of the needle 4. The looper is mounted on a looper rod through a looper holder (not shown) that is not shown. One end in the longitudinal direction of 32. The looper driving device 31 includes a drive unit body 33, a looper rod 32, a looper advancement and retraction mechanism 34, and a looper (not shown) that swings the looper rod 32 about its axis. Mechanism, swing force transmission mechanism 35. The drive device bodies 33, 20 are provided with a looper guide 36 and support cylinders 37 and 38 that support the looper guide 36. The support cylinders 37 and 38 are arranged on the same axis. Support The cylinders 37 and 38 are fixedly supported on the main body 5 of the sewing machine 1, and the looper guide 36 can swing around the axis direction of the support cylinders 37 and 38. The looper rod 32 is inserted into the through hole 37a of one of the support cylinders 37 And can slide freely in the direction of the above axis in 17 200417646. The other end of the looper rod 32 in the lengthwise direction, The support plate 36a protrudes in the axial direction. At the other end of the looper rod and the longitudinal direction, a slider mounting base 39 and the like are fixed. The looper advancement and retraction mechanism 34 includes a looper shaft 41 and a looper arm. The looper rod 32 supported on the looper guide 36 is provided with the looper offset axis direction and the axis direction of the looper rod 32 in the needle driving direction at the other end in the longitudinal direction. It is slightly orthogonal to the driving direction of the needle. In this embodiment, "slightly orthogonal" includes "orthogonal." A looper arm is mounted on one end of the looper shaft 41 in the longitudinal direction. The 10 looper arm 42 It is firmly attached to the looper shaft 41. In the looper arm ", a bracket 42 & is attached to the end of the outer side of the looper shaft 41 in the radial direction. The bracket 42 & is slidably held on the looper bar 32 at the other end in the longitudinal direction. The looper shaft 41 is linked to the lower shaft (not shown) through a crank mechanism (not shown). The looper shaft 41 follows the rotation of the lower shaft and around the axis direction of the looper shaft 41 The pendulum 15 moves. The looper arm 42 swings together with the looper shaft 41, thereby being slidably held on the bracket 42a. The looper rod 32 is driven forward and backward between one side and the other in the axial direction. The swing force transmission mechanism 35 includes a looper guide 36 and a slider 44. On the 4- and 4-needle guides 36, A guide hole 46 including a slit 45. The above-mentioned guide 20 hole 46 extends in a direction parallel to the axis direction of the looper rod 32. The cross section of the guide hole 46 is slightly V-shaped and can be engaged with the guide hole 46 The closed slider 44 is engaged with the guide hole 46. A part of the slider 44 is fixed to the slider mounting base 39 through the slit 45. With this structure, the looper bar 32 is supported by the slider. The sliding of 44 along the guide hole 46 18 is guided in the above-mentioned axial direction. At the same day temple, the slider 44 restricts the relative rotation of the looper rod 32 relative to the $ needle guide 件 | In other words, the swing force of the looper guide 36 is transmitted to the looper bar 32 by the slider 44 engaged with the guide hole 46. On the sliding blade of the looper driving device 31, such as a sliding member described later, a hardness component K1 having tungsten carbide, which has been described in the above embodiment, is applied. In this way, the abrasion resistance of the sliding portion can be increased. As a result, the supply of lubricating oil can be suppressed as much as possible, thereby effectively preventing abrasion of the sliding portion and generation of heat generation. The effect is substantially the same as that of the above embodiment. Specifically, at least one of the outer peripheral surface of the looper rod 32 and the sliding portion 37a of the support tube 37 sliding relative to the outer peripheral surface of the needle bar 32 has a melting point having High hardness component K1 of post-tungsten. In addition, tungsten carbide is deposited on at least one of the surface portion of the slider 44 engaged with the guide hole 46 and the sliding portion of the looper guide 36 with respect to the surface portion of the slider 44 / renal movement. High hardness component K1. The above-mentioned high hardness component K1 may be melted on other sliding parts than the above sliding parts. In another embodiment of the present invention, the number of the sliding portion of the 'high hardness component K1' is not limited to the portion near the looper rod 9 including the bird rod 9 and the portion near the needle rod 16 including the needle rod 16. For example, the inner peripheral surface of a needle rod ring (needle rod U > U) (not shown) connected to the needle rod holder 21 and the outer peripheral surface of the needle rod ring pin on the inner peripheral surface of the needle rod ring On at least one of these, the melting point has a high hardness component κι of tungsten carbide. In this way, the sliding resistance acting between the needle bar ring and the needle bar ring pin can be reduced. Therefore, the sliding speed of the needle bar 200417646 16 can be increased, and the operating speed of the sewing machine can be further increased. After the high-hardness component K1 is fused to the entire sewing machine part, the high-hardness component K1 fused to a portion other than the sliding portion may be removed by, for example, machining. In this embodiment, the high-hardness component K1 is entirely welded to the sliding portion of the sewing machine member 5. However, the high-hardness component K1 may be welded at appropriate intervals in the sliding direction. At this time, a thermal expansion difference acts between the base material of the sewing machine component and the high-hardness component K1 when the sewing machine is running and stopped, and the high hardness caused by the thermal expansion difference can be applied.
度成分K1的變形朝著滑動方向放掉。因此，可以更進一步 10 防止滑動部分的磨耗和産生發熱膠著。 如上所述，使具有碳化鎢的高硬度成分熔敷在滑動部 分上的縫紉機部件，是設在包縫縫紉機和平式連鎖缝縫紉 機等上的，但是，並不限定於這些縫紉機，例如，也可以 設在雙鏈式線跡縫紉機、鎖縫縫紉機（bar tacking 15 machine)、釘扣機、扣眼縫纺機等各種工業用縫幼機上。上 述縫紉機部件也適用於家庭用縫紉機。 具有碳化鎢的高硬度成分，還可以具有鎳和鉻。該高 硬度成分，利用加工液中的放電現象熔敷在滑動部分上 時，可提高滑動部分的耐蝕性。因此，可以更進一步抑制 20 對滑動部分的潤滑油供給量。 本案申請人，對由鉻鉬鋼構成的縫幼機部件的在上述 縫紉機部件上熔敷了具有碳化鎢的高硬度成分的工件、和 在縫紉機部件上熔敷了具有碳化鎢、鎳、鉻的高硬度成分 的工件，在同一條件下實施了耐蝕試驗。 20 200417646 試驗方法是，把各工件浸潰在例如濃度約70%的鹽酸 液中預定時間後，用目測檢查其外觀。從試驗結果可知， 在缝紉機部件上熔敷了具有碳化鎢、鎳、鉻的高硬度成分 的工件，與其他工件相比，具有優良的耐蝕性。在上述各 5 實施形態中，在不脫離申請專利範圍的前提下，可進行各 種部分的變更。 本發明，在不脫離其精神和主要特徵的前提下，可以 用其他各種形態來實施。因此，上述實施形態中的各點僅 僅是舉例而已，本發明的範圍由申請專利限定，不受本說 10 明書的限定。另外，在申請專利範圍内的各種變形和變更， 均在本發明的範圍内。 I：圖式簡單說明1 第1圖是本發明一實施形態之縫紉機的立體圖。 第2圖是表示作爲縫紉機部件之一例的、彎針機構主要 15 部分的斷面圖。 第3圖是表示作爲縫紉機部件之一例的、彎針機構主要 部分的斷面圖。 第4圖是表示作爲縫紉機部件之另一例的、針棒的動作 的斷面圖。 20 第5圖是本發明另一實施形態之平式連鎖縫縫紉機的 立體圖。 第6圖是用包含彎針棒（/1/一八棒)軸線的假想平面，將 平式連鎖缝縫紉機的彎針驅動裝置的主要部分剖開的斷面 圖。 21 200417646 【圖式之主要元件代表符號表】 1、1A…缝幼機 2…針板 4···針 5…機身 6···頭 7…柱 8…臂 9、32…彎針棒 10…上彎針 11…彎針導引金屬件 11a···滑動部分 12…彎針導引件 12a、46···導引孔 12b···表面部 13…幫針曲柄13 14…彎針曲柄銷 15…彎針軸 16…針棒 17、18···概套 19···上壁 20···下壁 21…針棒抱 22…針夾 3l···彎針驅動裝置 33…驅動裝置本體 34…彎針進退機構 35…擺動力傳遞機構 36…彎針導引件 36a···支承板 37、38…支承筒 37a…貫通孔 39…滑塊安裝台 41…彎針軸 42…彎針背 42a…支架 44…滑塊 45···狹縫 50…縫紉機架 50a···縫紉機頭 51…橫板 52…蓋部件 53…彎針機構 C1···上方 C2···下方 K1···高硬度成分 22The deformation of the degree component K1 is released in the sliding direction. Therefore, it is possible to further prevent abrasion of the sliding portion and generation of heat generation sticking. As described above, a sewing machine part in which a high-hardness component having tungsten carbide is welded to a sliding portion is provided on an overlock sewing machine or an interlock sewing machine, but is not limited to these sewing machines. It is installed on various industrial sewing machines such as double-chain stitch sewing machines, bar tacking 15 machines, button sewing machines, and buttonhole sewing machines. The above-mentioned sewing machine parts are also applicable to domestic sewing machines. It has a high hardness component of tungsten carbide, and may also have nickel and chromium. This high-hardness component can improve the corrosion resistance of the sliding portion when it is deposited on the sliding portion by a discharge phenomenon in the working fluid. Therefore, it is possible to further suppress the amount of lubricating oil supplied to 20 sliding portions. The applicant of the present case sintered a sewing machine part made of chrome-molybdenum steel, a workpiece having a high hardness component having tungsten carbide deposited on the sewing machine part, and a workpiece having tungsten carbide, nickel, and chromium deposited on the sewing machine part. The workpieces with high hardness components were subjected to corrosion resistance tests under the same conditions. 20 200417646 The test method is to immerse each workpiece in, for example, a hydrochloric acid solution having a concentration of about 70% for a predetermined time, and then visually inspect its appearance. From the test results, it was found that a workpiece having a high hardness component of tungsten carbide, nickel, and chromium was deposited on the sewing machine parts, and had superior corrosion resistance compared to other workpieces. In each of the five embodiments described above, various changes can be made without departing from the scope of the patent application. The present invention can be implemented in various other forms without departing from the spirit and main characteristics thereof. Therefore, the points in the above embodiment are just examples, and the scope of the present invention is limited by the application for a patent, and is not limited by this specification. In addition, various modifications and changes within the scope of the patent application are all within the scope of the present invention. I: Brief description of the drawings 1 FIG. 1 is a perspective view of a sewing machine according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing a main part of a looper mechanism as an example of a sewing machine part. Fig. 3 is a sectional view showing a main part of a looper mechanism as an example of a sewing machine part. Fig. 4 is a sectional view showing the operation of a needle bar as another example of a sewing machine part. Fig. 5 is a perspective view of a flat-type interlock sewing machine according to another embodiment of the present invention. Fig. 6 is a cross-sectional view of a main part of a looper driving device of a flat chain sewing machine using an imaginary plane including an axis of a looper bar (/ 1/18 bar). 21 200417646 [Representative symbols for the main components of the drawing] 1. 1A ... sewing machine 2 ... needle plate 4 ... needle 5 ... body 6 ... head 7 ... column 8 ... arm 9, 32 ... looper rod 10 ... Upper looper 11 ... Looper guide metal 11a ... Sliding part 12 ... Looper guide 12a, 46 ... Guide hole 12b ... Surface 13 ... Helper crank 13 14 ... Bend Needle crank pin 15 ... Bent needle shaft 16 ... Needle bar 17, 18 ... General set 19 ... Upper wall 20 ... Lower wall 21 ... Needle bar holder 22 ... Needle clamp 3l ... ... drive device body 34 ... looper advancement / retraction mechanism 35 ... swing force transmission mechanism 36 ... looper guide 36a ... support plates 37, 38 ... support tube 37a ... through hole 39 ... slider mounting table 41 ... looper shaft 42 ... looper back 42a ... bracket 44 ... slider 45 ... slit 50 ... sewing frame 50a ... sewing machine head 51 ... horizontal plate 52 ... cover member 53 ... looper mechanism C1 ... upper C2 ... Bottom K1 ... High hardness component 22