1379927 第095137495號申請案 101年5月29日修正替換 九、發明說明： t發明所屬技術領域3 發明領域 本發明係有關於一種用於縫紉機之縫紉機下轴轴承機 5 構。 發明背景 習知半迴轉釜之縫紉機搭載有用以將上軸之旋轉傳達 至下軸之下轴驅動機構。在此下軸驅動機構中，藉存在連 10 結於上軸之曲柄桿及大擺式齒輪，上軸之旋轉可傳達至下 軸(例如參照專利文獻1)。在此，下轴係咬合於大擺式齒輪， 為調整此齒輪間之齒隙（backlash)，而以下述之下軸軸承機 構設置成可自由調整位置。 第2圖係顯示習知下軸軸承機構之立體圖。如此第2圖 15所示，於下軸軸承機構100設置連結於圖中未示之曲柄桿而 可搖動自如之大擺式齒輪102，以將動力傳達至下軸。 於下軸101之大擺式齒輪1 〇2側之端部設置咬合於該大 擺式齒輪102之下軸齒輪1〇3。然後，此下軸丨〇1亦藉由設置 於下軸齒輪103内側之下軸金屬1〇4而旋轉自如地支撐於縫 20 紉機框架（省略圖式）。 下軸金屬HM由圓筒狀小徑部1〇5及太徑部1〇6構成小 徑部105插入縫紉機框架，而以固定螺絲等固定。於大徑部 1〇6内部安裝下軸軸承107，藉此下轴轴承1〇7將下轴1〇^ 撐成旋轉自如。且，小徑部105之外周之軸心i〇5a相對於大 5 第095137495號申請案 101年5月29日修正替| 徑部106之内周軸心106a偏心。 虽調整大擺齒輪1〇2與下轴齒輪1〇3間之齒隙時，以插 通下袖101之狀態，鬆開下軸金屬104之固定螺絲，而使下 轴金屬104相對於縫匆機框架旋轉。此時，由於小徑部105 轴d〇5a與大部106之軸心l〇6a偏心，故大擺式齒輪 102之袖心丨02a與下軸齒輪之軸心之間隔變化， 而可調整兩齒輪、1〇3間之齒隙。 【專利文獻1】日本專利公開公報2〇〇3_236282號 【發明内容】 發明揭示 發明所欲解決之課題 在此，大擺式齒輪1〇2驅動，傳達其動力時，在下軸齒 輪103於相互分離之方向施加負載f。此負載隨著大擺式齒 〇2之搖動巾週期性地變動。然而，在第2圖中之下轴 轴承機構1GG中’由於為單懸臂式構造，故當施加負荷F時， 下軸齒輪103之則端部振動，而產生噪音、磨損、破損等弊 端。 本發明之課題在於藉減低對下轴齒輪之負荷，防止該 齒輪之振動，而可抑㈣音、賴、破損等。 解決課題之手段 申清專利1巳圍第1項之縫切機之下軸轴承機構包含有藉 方疋動之上轴而來回旋動之驅動齒輪⑺；從相對於前述上軸 平订之下軸的-端朝内側間隔預定間隔而設置於該下轴，藉 與刖述驅動齒輪咬合旋動，使前述下減動之下軸齒輪 f/年f月知傲〆)正替換頁 (3);在前述下轴之較前述下軸齒輪内^下轴支— 撲成旋動自如，安裝於缝劫機框架，並可自由調整前述下 軸齒輪之軸心位置之第!軸承部(5);及在前述下軸之較前述 下軸齒輪外侧處’將前述下軸支樓成旋動自如之第2 (9)。 。 ,又’中請專利範圍第2項之縫_之下轴轴承機構之特 徵在於前述第2軸承部配置成可相對於縫紉機框架移動俾 可調整前述驅動齒輪與下軸齒輪之齒隙，且對應齒隙調整 後之前述Τ軸錄之軸,讀置而可安裝於前述縫初機= 架。 發明效果 根據本發明，由於第1轴承部與第2軸承部隔 支樓下軸’故以雙懸臂構造支撲下軸之下轴齒輪設置 處。藉此，施加於下軸齒輪之負裁可分散至第ι轴承部 2轴承部，故可減低對下軸或第1轴承部之負戟。特別β因 為雙懸臂構造，下軸齒輪W振動，結果，可抑制二 磨損、破損等。 *曰 且’由於第2轴承部對應下輪齒輪之轴心位置而安裝於 縫幼機《’故即使在觀下㈣輪之轴錢置後，仍'、 藉第2軸承部確實地支撐下軸。 乃可 實施發明之最佳形態 以下’參照第1圖’就本發明之實施形態作說明。此下 姉承機構1係適用於設置於畅機之進給機構之下轴或 ==之缝劫機之下軸等者。如第1圖所示，下軸軸承 有错旋動之上轴（省略圖式）而來回旋動之大擺式 齒輪(驅動錢)2。此大擺式齒輪2有直接連結於上轴而旋動 者或連結於相對於上軸連動之曲柄桿而旋動者。 又，在下轴轴承機構1，與大擺式齒輪2咬合而來回旋 動之下軸齒輪3為使相對於上軸平行之下軸4旋動乃從下 轴4之一端朝内側(下轴4之軸線方向-方向側：在圖中為左 側）間隔財間隔，而插通固定於該下軸〇此下軸4之轴心 4a與下軸齒輪3之軸心3a配置於同一線上。 在下軸4之下軸齒輪3内側處，設有相對於縫紉機框架 (省略圖式)將下轴4支樓成旋動自如之下轴金屬（第工轴承 部）5。下轴金屬5由圓筒狀之小徑部6及大徑部了構成小徑 部6插入縫㈣而賴定螺料蚊。大徑部7之内部 女裝有第1下軸轴承8，藉此第1下軸軸承8，將下軸4支樓成 旋動自如。然後，小徑部6外周之軸心6a相對於大徑部7内 周之軸心7a偏心。在此，由於大徑部7之軸心7a相對於下軸 齒輪3及下軸4之軸心3a、4a配置於同一線上，故該等軸心 3a、4a亦相對於小徑部6之軸心6a偏心。因有此偏心，故可 調整下軸齒輪3之軸心3a。 又，在下軸4之下軸齒輪3外側處（下軸4之軸線方向之 另一方向侧：在圖中為右側），為將下軸4支撐成旋動自如， 而設有由固定板11及第2下軸轴承15構成之第2軸承部9、將 第2軸承部9固定於縫紉機框架之固定螺絲1〇、1〇。 固定板11於中央及兩端形成貫穿孔12、13、14，於相 1379927 修(/)正替換頁 對於下轴4之軸心4a垂直相交之方向延伸，而以前述固定螺 絲10、10固定於縫紉機框架。 將下轴4支樓成旋轉自如之第2下轴轴承15插入中央之 貫穿孔12 ’而固定於固定板^。 5 ㈣之貫冑孔13、14於將固定板inns於縫城框架 時’為固定螺絲10所插通。貫穿孔13、M之内徑設定為較 固定螺絲10之螺紋部16之外徑大，較螺絲頭17之外徑小之 值。藉此，固定板11可調整位置至約螺紋部16與貫穿孔13、 14之徑之差。此徑之差設定為較調整大擺式齒輪2與下轴齒 1〇輪3之齒隙時之下軸4之最大移動量大。即，由於第2轴承部 9至少可調整位置至約下軸4之最大移動量，故對應該下軸4 之軸心4a之位置而使第2轴承部9變動。 此外’除了此實施例外，亦可於縫紉機框架形成長孔， 螺紋部16可在該長孔之範圍内移動固定。 接著，就本實施形態之作用作說明。 於調整大擺式齒輪2與下軸齒輪3之時，作業員首先鬆 開第2軸承部9之固定螺絲，解除固定板^之固定，同時， 备開下軸金屬5之固定螺絲，解除下軸金屬5之固定。 然後，作業員解除固定板11相對於縫紉機框架及下軸4 20 之固定後，使下轴金屬5旋轉。由於小徑部6之轴心6a與大 技部7之軸心7a偏心，故隨著下軸金屬5之旋轉，大擺式齒 輪2之輛心2a與下軸齒輪3之軸心4a之間隔L1產生變化，而 可調整兩齒輪2、4間之齒隙。 當確保任一齒隙時，作業員將固定螺絲鎖固，固定下 9 軸金屬5。接著，作業員將固定板11安裝於縫紉機框架及下 軸4，此時’藉調整齒隙，即使下軸齒輪3或下軸4之轴心3a、 4a移動，第2軸承部9仍對應下軸4之軸心4a之位置而變動自 如’故可輕易將固定螺絲10鎖緊固定。 5 如以上，根據本實施形態之下軸轴承機構1，由於下軸1379927 Application No. 095137495 Revision No. </ RTI> </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; BACKGROUND OF THE INVENTION A conventional semi-rotary kettle sewing machine is provided with a shaft drive mechanism for transmitting the rotation of the upper shaft to the lower shaft. In the lower shaft drive mechanism, by the crank lever and the large swing gear which are coupled to the upper shaft, the rotation of the upper shaft can be transmitted to the lower shaft (for example, refer to Patent Document 1). Here, the lower shaft is engaged with the large pendulum gear, and in order to adjust the backlash between the gears, the shaft bearing mechanism is set to be freely adjustable in the following state. Figure 2 is a perspective view showing a conventional lower shaft bearing mechanism. As shown in Fig. 2, the lower shaft bearing mechanism 100 is provided with a large swing gear 102 that is coupled to a crank lever (not shown) to swing the power to the lower shaft. An end portion of the lower pendulum gear 1 〇 2 side of the lower shaft 101 is provided to be engaged with the lower shaft gear 1 〇 3 of the oscillating gear 102. Then, the lower shaft 1 is also rotatably supported by the slit frame (not shown) by being disposed on the inner side of the lower shaft gear 103 under the shaft metal 1〇4. The lower shaft metal HM is inserted into the sewing machine frame by the small-diameter portion 1〇5 and the small-diameter portion 1〇6, and is fixed by a fixing screw or the like. The lower shaft bearing 107 is mounted inside the large diameter portion 1〇6, whereby the lower shaft bearing 1〇7 supports the lower shaft 1〇. Further, the axial center i〇5a of the outer circumference of the small-diameter portion 105 is eccentric with respect to the inner circumferential axis 106a of the diameter portion 106 of the modification of the large-diameter portion 095,137,495. When the backlash between the large pendulum gear 1〇2 and the lower shaft gear 1〇3 is adjusted, the fixing screw of the lower shaft metal 104 is loosened by inserting the lower sleeve 101, and the lower shaft metal 104 is slid relative to the seam. The machine frame rotates. At this time, since the axis d〇5a of the small-diameter portion 105 is eccentric with the axis l〇6a of the large portion 106, the interval between the sleeve center 02a of the large pendulum gear 102 and the axis of the lower shaft gear changes, and two can be adjusted. Gear, 1 〇 3 gap between the teeth. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei No. Hei No. Hei. No. Hei. No. 3-236282. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION In the present invention, when the large pitch gear 1〇2 is driven and the power is transmitted, the lower shaft gear 103 is separated from each other. The load f is applied in the direction. This load periodically changes with the rocking wiper of the large pendulum. However, in the lower shaft bearing mechanism 1GG in Fig. 2, since the single cantilever structure is employed, when the load F is applied, the end portion of the lower shaft gear 103 vibrates, causing noise, abrasion, breakage and the like. An object of the present invention is to reduce the vibration of the gear by reducing the load on the lower shaft gear, and to suppress the sound, the damage, the breakage, and the like. Means for Solving the Problem Shen Qing Patent 1 The seam bearing machine under the first item has a drive gear (7) that rotates back and forth with a borrowing of the upper shaft; it is flattened relative to the aforementioned upper shaft. The end of the shaft is disposed at a predetermined interval from the inner side to the lower shaft, and the rotation of the drive gear is described by the rotation of the drive shaft, so that the lower shaft gear f/year is reduced (3) The lower shaft of the lower shaft gear is lower than the shaft shaft of the lower shaft gear, and is screwed into the frame of the seaming machine, and the shaft bearing position of the lower shaft gear can be freely adjusted (5); And at the outer side of the lower shaft gear at the outer side of the lower shaft gear, the second lower portion is rotatably 2nd (9). . And the lower shaft bearing mechanism of the second aspect of the patent scope is characterized in that the second bearing portion is configured to be movable relative to the sewing machine frame, and the backlash of the driving gear and the lower shaft gear can be adjusted, and corresponding The shaft of the aforementioned boring axis after the backlash adjustment is read and can be mounted on the sewing machine = frame. Advantageous Effects of Invention According to the present invention, since the first bearing portion and the second bearing portion are spaced apart from each other, the lower shaft is disposed in a lower cantilever structure with a double cantilever structure. Thereby, the negative cut applied to the lower shaft gear can be dispersed to the bearing portion of the first y bearing portion 2, so that the yoke against the lower shaft or the first bearing portion can be reduced. In particular, since the β is a double cantilever structure, the lower shaft gear W vibrates, and as a result, it is possible to suppress two abrasions, breakage, and the like. *曰 and 'Because the second bearing part corresponds to the axial position of the lower gear, it is attached to the slitting machine. 'So even after the shaft of the wheel is placed, it is still supported by the second bearing. axis. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to Fig. 1 . The lower bearing mechanism 1 is suitable for the shaft below the feed mechanism of the machine or the lower shaft of the seam machine. As shown in Fig. 1, the lower shaft bearing has a large pendulum gear (drive money) that rotates the upper shaft (omitted pattern) and rotates back and forth. The large oscillating gear 2 is rotatably coupled to the upper shaft and rotated or coupled to a crank lever that is coupled with respect to the upper shaft. Further, in the lower shaft bearing mechanism 1, the shaft gear 3 is engaged with the large pendulum gear 2 to rotate back and forth, and the shaft gear 3 is rotated so that the shaft 4 is rotated from the lower end of the lower shaft 4 toward the inner side (the lower shaft 4). The axis direction-direction side: the left side in the drawing) is spaced apart from each other, and the axis 4a of the lower shaft 4 and the axis 3a of the lower shaft gear 3 are disposed on the same line. At the inner side of the lower shaft 4 below the shaft gear 3, a shaft metal (pilot bearing portion) 5 for rotating the lower shaft 4 branch with respect to the sewing machine frame (omitted from the drawing) is provided. The lower shaft metal 5 is formed by a small-diameter portion 6 having a cylindrical shape and a large-diameter portion, and the small-diameter portion 6 is inserted into the slit (four) to fix the mosquito. The inside of the large diameter portion 7 is equipped with a first lower shaft bearing 8, whereby the lower shaft bearing 8 is used to rotate the lower shaft 4 branch. Then, the axial center 6a of the outer circumference of the small diameter portion 6 is eccentric with respect to the axial center 7a of the inner circumference of the large diameter portion 7. Here, since the axial center 7a of the large diameter portion 7 is disposed on the same line with respect to the axial centers 3a and 4a of the lower shaft gear 3 and the lower shaft 4, the axial centers 3a and 4a are also aligned with respect to the axis of the small diameter portion 6. Heart 6a is eccentric. Due to this eccentricity, the axis 3a of the lower shaft gear 3 can be adjusted. Further, at the outer side of the lower shaft 4 below the shaft gear 3 (the other direction side in the axial direction of the lower shaft 4: the right side in the drawing), the lower shaft 4 is rotatably supported by the fixing plate 11 The second bearing portion 9 including the second lower shaft bearing 15 and the fixing screws 1A and 1B for fixing the second bearing portion 9 to the sewing machine frame. The fixing plate 11 is formed with through holes 12, 13, and 14 at the center and both ends, and the first (375) replacement page of the phase 1379927 extends in the direction in which the axis 4a of the lower shaft 4 intersects perpendicularly, and is fixed by the aforementioned fixing screws 10, 10. On the sewing machine frame. The second lower shaft bearing 15 that is rotatable in the lower shaft 4 is inserted into the center through hole 12' and fixed to the fixed plate. 5 (4) The through holes 13, 14 are inserted into the fixing screw 10 when the fixing plate is inns in the seam frame. The inner diameter of the through holes 13, M is set to be larger than the outer diameter of the threaded portion 16 of the fixing screw 10, and smaller than the outer diameter of the screw head 17. Thereby, the fixing plate 11 can be adjusted to a difference between the diameter of the threaded portion 16 and the through holes 13, 14. The difference between the diameters is set to be larger than the maximum movement amount of the lower shaft 4 when the backlash of the large pendulum gear 2 and the lower shaft gear 1 is adjusted. In other words, since the second bearing portion 9 can adjust at least the position to the maximum amount of movement of the lower shaft 4, the second bearing portion 9 is changed in accordance with the position of the shaft center 4a of the lower shaft 4. Further, in addition to this embodiment, a long hole may be formed in the sewing machine frame, and the threaded portion 16 may be moved and fixed within the range of the long hole. Next, the action of this embodiment will be described. When the large pendulum gear 2 and the lower shaft gear 3 are adjusted, the operator first loosens the fixing screw of the second bearing portion 9 to release the fixing plate, and at the same time, prepares the fixing screw of the lower shaft metal 5, and releases the fixing screw. The shaft metal 5 is fixed. Then, the operator releases the fixing of the fixing plate 11 with respect to the sewing machine frame and the lower shaft 4 20, and then rotates the lower shaft metal 5. Since the axis 6a of the small-diameter portion 6 is eccentric with the axis 7a of the large-sized portion 7, the space between the center 2a of the large-pitch gear 2 and the axis 4a of the lower-axis gear 3 is separated with the rotation of the lower-axis metal 5. L1 changes, and the backlash between the two gears 2, 4 can be adjusted. When securing any backlash, the operator locks the set screw and secures the lower 9-axis metal 5. Next, the operator attaches the fixing plate 11 to the sewing machine frame and the lower shaft 4, and at this time, by adjusting the backlash, even if the shaft centers 3a and 4a of the lower shaft gear 3 or the lower shaft 4 move, the second bearing portion 9 corresponds to the lower portion. The position of the shaft 4a of the shaft 4 is freely changed, so that the fixing screw 10 can be easily locked and fixed. 5 As described above, according to the present embodiment, the shaft bearing mechanism 1 is the lower shaft.
金屬5與第2軸承部9隔著下轴齒輪3，支撐下軸4,故以雙懸 臂構造支撐下軸4之下轴齒輪3«藉此，施加於下軸齒輪3之 負載可分散至下軸金屬5及第2軸承部9，故可減低對下軸4 或下軸金屬5之負載。特別是因為雙懸臂構造，下軸齒輪3 10不易振動，結果，可抑制噪音、磨損、破損等。 且’由於第2軸承部9對應下軸齒輪3之軸心3a位置而安 裝於縫匆機柩架’故即使在調整下軸齒輪3之軸心3a位置 後’仍可藉第2軸承部9確實地支撐下轴4。 此外，本發明不以上述實施形態為限，可進行適當變 15更自是無須贅言的。The metal 5 and the second bearing portion 9 support the lower shaft 4 via the lower shaft gear 3, so that the lower shaft 4 lower shaft gear 3 is supported by the double cantilever structure, whereby the load applied to the lower shaft gear 3 can be dispersed to the lower side. Since the shaft metal 5 and the second bearing portion 9 reduce the load on the lower shaft 4 or the lower shaft metal 5. In particular, the lower shaft gear 3 10 is less likely to vibrate due to the double cantilever structure, and as a result, noise, abrasion, breakage, and the like can be suppressed. Further, since the second bearing portion 9 is attached to the seam burr in accordance with the position of the axis 3a of the lower shaft gear 3, the second bearing portion 9 can be borrowed even after adjusting the position of the shaft center 3a of the lower shaft gear 3. The lower shaft 4 is reliably supported. Further, the present invention is not limited to the above-described embodiments, and it is needless to say that it can be appropriately changed.
【圏式簡單說明】 第1圖係顯示本發明之下軸轴承機構之立體圖。 第2圖係顯示習知之下軸軸承機構之立體圖。 【主要元件符號說明】 4…下軸 4a. ·.轴心 1…下轴軸;冓 2…大擺式齒輪 2s.. 心 3…下轴齒輪 5...下軸金屬(第1軸承部) 6...小徑者Ρ 6a. 軸心 3a...轴心 10 1379927 7…大徑部 102…大擺式齒輪 7a.··軸心 102a··.軸心 8...第1下軸軸承 103...下轴齒輪 9…第2轴承部 103a...軸心 10...固定螺絲 104...下轴金屬 11...固定板 105…小徑部 Π...貫穿孔 105a. ·.軸心 13...貫穿孔 106…小徑部 14...貫穿孔 106a...軸心 15...第2下軸軸承 107...下轴轴承 16".螺紋部 L1...間隔 17...螺絲頭 L2…間隔 100...下軸軸承機構 F...負载 101...下軸 11BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a shaft bearing mechanism of the present invention. Figure 2 is a perspective view showing a conventional shaft bearing mechanism. [Main component symbol description] 4... Lower shaft 4a. · Axis 1... Lower shaft; 冓 2... Large pendulum gear 2s.. Heart 3... Lower shaft gear 5... Lower shaft metal (1st bearing part 6... Small path Ρ 6a. Axis 3a... Axis 10 1379927 7... Large diameter part 102... Large pendulum gear 7a.·Axis 102a··. Axis 8...1st Lower shaft bearing 103...lower shaft gear 9...second bearing portion 103a...axis 10...fixing screw 104...lower shaft metal 11...fixing plate 105...small diameter portion... Through hole 105a. · Axis 13... Through hole 106... Small diameter portion 14... Through hole 106a... Axis 15... Second lower shaft bearing 107... Lower shaft bearing 16". Threaded portion L1...interval 17...screw head L2...interval 100...lower shaft bearing mechanism F...load 101...lower shaft 11