201037111 六、發明說明： 【發明所屬之技術領域】 本發明關於一種控制圓形梭織機之梭子上之緯紗帶張 力的裝置，其中該梭子包含帶偏斜機構，且可設置緯紗帶 筒管。緯紗帶可被從緯紗帶筒管放出且被引導越過帶偏斜 機構。藉此，藉由放出緯紗帶期間發生的緯紗帶張力，帶 偏斜機構可抵抗恢復力而被偏斜離開靜止位置。且帶偏斜 0 機構的位置取決於緯紗帶張力和恢復力。 再者，本發明包含用於圓形梭織機的梭子和設有該等 梭子的圓形梭織機，該梭子設有該緯紗帶張力控制系統。 【先前技術】 圓形梭織機用於生產管狀織物。圓形梭織機的重要應 用領域是從已伸展的塑膠帶（band )生產高韌性的管狀織 物。可使用這些高韌性管狀織物生產包裝袋，該等包裝袋 Q 例如用於包裝散裝的（bulk )材料。 例如本案發明人之歐洲專利第EP787226號案已描述 圓形針織機，且圓形針織機已多年證明其在全世界的價値 。該歐洲案的說明書倂入本案做參考。歐洲專利第 EP7 8 7226號案描述圓形梭織機的基本功能組，特別是複 數的剖面軸桿，其配置在圓形簧片（reed )的周圍形成圓 形，且每一軸桿帶有複數內綜線和外綜線（harness),用 以在每一情況引導圓形配置之兩經紗集合體的一部分，其 藉由旋轉的主軸桿而交替進行向上和向下的相反運動，用 -5- 201037111 於分別形成所謂的梭織梭口（ weaving shed )或行進梭口 (walking shed)。主軸桿藉由板狀凸輪旋轉驅動圓形簧 片中的梭子’該等梭子在每一種情況中在行進梭口內運動 。每一梭子支撐具有緯紗帶的筒管，該等緯紗帶被輸送至 織邊。因此而形成的管狀織物被織物拉除裝置拉走。在較 早期的圓形梭織機中’織物拉除裝置經由齒輪機構連接至 梭織機的主軸桿而具有直接驅動。此產生的缺點是：即使 設有緯紗帶監視機構’但是由於緯紗帶斷線或緯紗帶筒管 已用盡，所以可能發生緯紗帶的失誤，此等失誤會導致在 織物中有較薄的地方。該緯紗帶監視機構對所檢測到的緯 紗帶失誤做出回應’立即傳送停止信號至機器中用於驅動 圓形梭織機的主軸桿和織物拉除裝置的馬達。但是因爲慣 性力，所以馬達無法突然停止，而是在正作用於主軸桿之 大慣性力的作用下進一步旋轉。但是此亦涉及織物的拉除 ，因爲至少少了一緯紗帶，所以在梭子循環後的期間，現 在只有較少的緯紗線被織入每一經紗織造（tie )長度單元 內。 在歐洲專利第EP78 7226號案中，此問題被分離的馬 達解決了。該馬達經由齒輪機構至少驅動拉除輥和（選擇 性地）織物捆。該馬達的旋轉速率經由速率規制裝置而受 電腦控制。該電腦經由脈衝產生器或類似裝置連接至圓形 梭織機的主驅動裝置，以分別產生和圓形梭織機或主軸桿 之旋轉速率成比例的脈衝。 201037111 【發明內容】 藉由本發明’即使發生緯紗帶失誤時，仍可使織物密 度保持橫定。但是EP78 7226號案所提供的解決方案，只 有在發生緯紗帶失誤時才控制織物的密度。 在織造時’經紗線和緯紗線兩者或緯紗線承受張應力 。被生產之管狀織物的織物圖案，實質上是取決於紗線或 帶（band )中之張力》經紗帶被引導越過所謂的拉入輥， 0 藉由拉入輥且在可調整之制動扭矩的輔助之下，將張應力 (經紗張力）賦予給經紗帶。通常以彈簧負載的制動內襯 直接在緯紗筒管的周圍上滑動，而完成經紗帶的張應力（ 經紗張力）。處理和調整該機械式緯紗制動，需要經驗和 小心。每一筒管材料和襯墊圖案具有不同的摩擦係數。經 常發生取代性制動內襯材料的議題。在一些應用中，由於 作業期間增加的污染和織造灰塵，以致改變了摩擦係數。 此外，緯紗帶材料有被滑動之制動內襯損壞的危險。 Q 因此，此習知系統幾乎不能保證恆定的緯紗張力；其 次’當機器正在運轉（亦即梭子在機器內旋轉）時，甚至 瞬間的緯紗張力不受控制。 對緯紗帶張力的另一影響因素是緯紗筒管之現行直徑 所產生的緯紗筒管瞬間速率。直到筒管結束時旋轉速率的 增加，達到全滿筒管之初始旋轉速率的數倍。因此’由於 摩擦效果，所以緯紗帶張力的增加和筒管的結束不成比例 〇 對緯紗帶張力的全部這些影響和其變化，都反應在以 201037111 下述形式生產的織物中： 以太低的緯紗張力形成緯紗帶的紗圈； 織物束緊；亦即在緯紗張力太高，管狀織物的胃1 縮減。 爲了能生產寬度有小變化（周邊的可變化性）但f胃 有紗圈形成的高品質的織物，希望在運轉作業期間’能® 續地或至少在預定的時間間隔監視和控制緯紗帶張力° 因此，本發明的主要目的在於提供控制圓形梭織機t 梭子上的緯紗帶張力之裝置，藉此能生產具有恆定周邊和 完美織物圖案之高品質管狀織物。 如上所述，也已知在圓形梭織機上設置緯紗帶監視機 構，該監視機構對所檢測到的緯紗帶損失做回應，立即傳 輸停止信號至驅動圓形梭織機之主軸桿的馬達，且選擇性 地傳輸停止信號至織物拉除裝置之驅動馬達。 包含有用於監視緯紗帶之裝置的圓形梭織機，被揭露 在例如本案申請人的第EP 7 8 6026號歐洲專利，茲將該案 倂入本案做參考。在用於監視圓形梭織機上之緯紗線的此 裝置中，從梭子的各筒管放出緯紗線，該等梭子沿著圓形 簧片所形成的軌道在織造梭口內旋轉，且該等緯紗線被輸 送至已產出之圓形織物的織物邊緣；掃描機構監視各緯紗 帶，以在緯紗帶損失的情況產生電性控制信號。此係因爲 電性控制信號是由磁性感測器所產生，該磁性感測器設置 在梭子之軌道的區域內，且和各梭子所支撐之永久磁鐵配 合；其中永久磁鐵設置在樞接的槓桿上，該槓桿抵抗像彈 -8 - 201037111 簧之重置（reset )機構的作用而從拉除的緯紗帶偏斜，且 被保持在和磁性感測器操作性連接的外側，以便在重置機 構的作用下到達其最終位置（如果緯紗帶損失）。該最終 位置產生永久磁鐵對磁性感測器的操作性連接，以產生主 動的控制信號。 用於監視紗帶的此裝置，多年來已證明其在全世界 之圓形梭織機的價値。然而希望可獲得機械上更簡單之用 0 於監視緯紗帶的裝置，該裝置涉及較低零組件的經費，且 因此較小’但仍然可信賴的。因此，本發明的第二方面是 提供此種用於監視圓形梭織機上之緯紗帶的改良裝置。 在緯紗斷線（緯紗帶破裂）的情況，特別需要此種緯 紗帶的監視。如果緯紗筒管上的帶材料規則地趨近其末端 ，此將自動地且就在真實末端之前被檢測。至此，附加的 緯紗帶監視已達成此目的。 執行附加之緯紗帶監視的一種可能性是輕障礙物，其 Q 在緯紗筒管套筒被引導。如果筒管的最底層被放出，則反 射器條被釋放，且感測器改變。另一種可能性是使用對比 感測器，當最底層被放出時，對比感測器辨識明亮的筒管 材料和暗色的筒管套筒等的對比。 從文件AT504109，已知用於在圓形梭織機上形成緯 紗帶筒管更換控制信號的方法和裝置。藉此’即時和精密 地檢測更換緯紗帶筒管的需要，所以可中斷織造製程和更 換各緯紗帶筒管。應該可信賴地顯示’所需的筒管更換也 是在高作業速率進行。對此問題的建議解決方案是基於緯 -9 - 201037111 紗帶筒管的角速度或角速度之時間積分的決定，其中速度 信號被供給至中央計算和評估單元，將速度信號或其波動 和極限値相比較，且當到達該極限値時，產生緯紗帶筒管 更換控制信號。 本發明的第三方面包含產生對圓形梭織機中之梭子上 的緯紗帶筒管塡充位準的可信賴監視。可用低的零件經費 進行該監視，且選擇性地當緯紗帶筒管快被耗盡時，產生 緯紗帶筒管更換信號。 本發明解決具有如申請專利範圍第1項特徵之用於控 制圓形梭織機之梭子上的緯紗帶張力之裝置所造成的問題 ，且用於解決具有附屬項特徵之本發明實施例所造成的問 題。本發明的控制裝置可被整合在梭子內。以此方式設置 的梭子，被使用在本發明的圓形梭織機內。 在本發明用於控制圓形梭織機之梭子上之緯紗帶張力 的裝置中，該梭子具有帶偏斜機構且可設有緯紗帶筒管， 緯紗帶可被從該緯紗帶筒管放出且被引導越過該帶偏斜機 構，藉此，該帶偏斜機構可經由在放出該緯紗帶期間發生 的緯紗帶張力抵抗恢復力而從靜止位置被偏斜，且該帶偏 斜機構的位置取決於該緯紗帶張力和該恢復力。該控制裝 置包含：偏斜感測器，用於檢測該帶偏斜機構的現行位置 ，且用於產生偏斜信號作爲該帶偏斜機構之該現行位置的 函數；類比或數位計算元件，可用作爲控制變數的該偏斜 信號供給該計算元件；可變的機電負載，藉此，依據修正 變數施加可變的制動扭矩在該緯紗帶筒管上；其中，該計 -10- 201037111 算元件由供給至該計算元件的該偏斜信號或該偏斜信號的 統計學量（例如平均値），計算用於調整該可變的機電負 載的該修正變數，使得該帶偏斜機構之位置的希望値和因 此該緯紗帶張力的希望値可分別調整他們自己或趨近他們 自己。 應瞭解「可變的機電負載」一詞，包含至少一電性零 件和配合該電性元件的至少一機械元件。其中，該至少一 0 機械元件能施加制動扭矩在緯紗帶筒管上。電性元件配合 機械元件，使得電性元間之一個參數（例如高度、或電流 的頻率、或電壓、或其信號形式）的變化，會造成緯紗帶 筒管上機械元件所施加之制動扭矩的改變。 爲了使控制裝置快速適應作業參數的變化，例如當圓 形梭織機改裝成用於不同的帶材料或改變規格成用於所欲 的緯紗帶張力，則可想像得到，界定帶偏斜機構之位置的 所欲値之指令變數可被供給至控制器。可被供給的指令變 Q 數較佳是在運轉作業期間可調整。 在本發明免維護實施例之控制裝置中，其適於在圓形 梭織機之運轉作業期間內普遍的粗糙條件，可變的機電負 載包含電動馬達，其可藉由緯紗帶筒管的旋轉而由發斷機 操作，且饋給可變的電阻。藉由該發電機操作的電動馬達 ，可用電能供給控制裝置，所以可將該控制裝置設計成自 行維持的系統，其不必依賴導線便可作業。在本發明之進 一步實施例包含有自行維持能量供給的控制裝置中，設有 電能儲存器（例如蓄電器、電容、或線圈），其被發電機 -11 - 201037111 操作的電動馬達以電能供給’且該電能儲存器反過來以電 能供給空制裝置。 如果將電阻的阻抗建構成可依據修正變數而調整’則 可獲得優良的可控制性。 在本發明之堅固耐用且較佳的變化例中’帶偏斜機構 包含可偏斜的弓、或具有可偏斜旋轉軸的輥、或可偏斜的 孔眼，該可偏斜的弓較佳地可線性地偏斜或在其角位置偏 斜。 在本發明的實施例中，可以在機械上簡單但仍可信賴 的方式建構。藉由彈簧元件或配重或運動該梭子所產生的 離心力，可產生作用在該帶偏斜機構上的該恢復力。 在本發明的較佳實施例中，控制裝置包含緯紗帶停止 運動元件，其監視帶偏斜機構的位置，且當相對於該帶偏 斜機構之靜止位置的最小偏斜不足時，該緯紗帶停止運動 元件發出警示信號。因此，當帶斷線或結束時，可以簡單 且不必維護的方式產生信號，此適於粗製作業。 在本發明特別佳的變化例中，控制裝置包含緯紗帶停 止運動元件，其監視帶偏斜機構的位置，且緯紗帶停止運 動元件檢測帶偏斜機構的橫越擺動，其係因該緯紗帶從該 緯紗帶筒管的一端橫越至另一端所引起，且如果該橫越擺 動的頻率已特徵地變化至上極限値，該緯紗帶停止運動元 件發出緯紗帶筒管更換信號。以此方式，圓形梭織機的操 作者可在適當的時間警覺到緯紗帶筒管需要更換的事實。 在本發明非常堅固耐用的實施例中，其不需額外的零 -12- 201037111 組件便可實施。該帶偏斜機構包含帶引導區段，該緯紗帶 在橫越期間沿著該帶引導區段移位，且該帶引導區段的幾 何設計放大該帶偏斜機構的該橫越擺動。 爲了分別傳送控制裝置之狀態資訊和設有控制裝置之 梭子的狀態資訊至圓形梭織機的機器控制（不必設置複雜 的導線和爲了此目的滑動接點），且爲了分別接收來自機 器控制器的指令，較佳是如果控制裝置設有和圓形梭織機 0 的機器控制器無線通信用的傳送接收裝置。由於此結構， 所以傳送接收裝置可接收來自該機器控制器的指令變數， 且將該指令變數傳輸至控制裝置的計算元件。相反地，該 傳送接收裝置可分別傳輸該帶偏斜機構的該現行位置和由 該現行位置所推導出的統計學資料，和/或選擇性地分別 傳輸該緯紗帶停止運動元件的警示信號和緯紗帶筒管更換 裝置至該機器控制器。 在上述的全部實施例中，本發明用於控制緯紗帶張力 〇 之控制裝置’適於整合在圓形梭織機的梭子內。其中該梭 子包含帶偏斜機構且可設有緯紗帶筒管，緯紗帶可被從該 緯紗帶筒管放出且被引導越過該帶偏斜機構，藉此，該帶 偏斜機構可經由在放出該緯紗帶期間發生的緯紗帶張力抵 抗恢復力而從靜止位置被偏斜，且該帶偏斜機構的位置取 決於該緯紗帶張力和該恢復力。 如果本發明的圓形梭織機設有梭子，則在使用寬度保 持裝置平坦地摺疊織物以後，可控制分別以此圓形梭織機 或以其寬度生產之管狀織物的周邊。爲了此目的，圓形梭 -13- 201037111 織機的機器控制器週期性地或連續地檢測已平坦摺疊之管 狀織物的現行寬度。如果超過最大寬度，則將該指令變數 的値傳輸至梭子的該控制裝置，導致增加在該梭子上的該 緯紗帶張力。類似地，如果少於最小寬度’則機器控制器 將該指令變數的値傳輸至梭子的該控制裝置’導致減少在 該梭子上的該緯紗帶張力。 【實施方式】 參考圖1、2，下文圖解說明控制圓形梭織機之梭子 30上之緯紗帶張力FS的裝置20之實施例。控制裝置20 整合在梭子30內。梭子30包含帶偏斜機構3。在本例示 的實施例中，將該帶偏斜機構建構成在其角位置可偏斜的 弓狀。帶偏斜機構的其他實施例可爲線性可偏斜的弓、具 有可偏斜旋轉軸線的輥子、或可偏斜的孔眼。 梭子30設有緯紗帶筒管1，筒管1可旋轉地安裝至軸 桿1 a。緯紗帶2被從緯紗帶筒管1引導至帶偏斜機構3上 ，且在作業期間從緯紗帶筒管1放出緯紗帶2，並將緯紗 帶2輸送至已織成之管狀織物的織邊9a。因爲制動扭矩7 作用在軸桿1 a上，所以在放出緯紗帶2的期間，緯紗帶 張力FS會變大。該緯紗帶張力FS有將帶偏斜機構3從其 靜止位置3 a偏斜的傾向。帶偏斜機構3之偏斜被固定至 梭子3 0和帶偏斜機構3之彈簧4所產生的恢復力FR反作 用。在由於彈簧4的輔助而產生恢復力FR的另一實施例 中’藉由重量或運動梭子30而產生的離心力也會產生該 -14- 201037111 恢復力FR。因此，帶偏斜機構3的現行位置取決於緯紗 帶張力F S和恢復力F R。 藉由偏斜感測器5檢測帶偏斜機構3的現行位置，該 偏斜感測器5產生偏斜信號5 a，該偏斜信號5 a做爲帶偏 斜機構3之現行位置的函數。在本例示的實施例中，將偏 斜感測器5設計成角度感測器。偏斜信號5 a被供給至類 比或數位計算元件1 2當作控制變數y。設計計算元件1 2 ❹ ’使得計算兀件1 2由偏斜信號5 a或偏斜信號5 a之統計 學量（例如平均値）、和指令變數w計算出修正變數u。 其中，指令變數W定義帶偏斜機構3之位置的希望値；指 令變數w也是由於帶偏斜機構3之位置和緯紗帶張力FS 間的關聯性所致之緯紗帶張力F S希望値的量度。該修正 變數調節作用在緯紗帶筒管1之軸桿1 a上的制動扭矩7， 使得帶偏斜機構3的位置會自行調節至指令變數w所預定 的位置，或至少趨近該預定位置。更明確地說，修正變數 Q u調節可變的機電負載，該負載係依據修正變數u而施加 可變的制動扭矩7在緯紗帶筒管1上。可變的機電負載包 含安裝至軸桿la的電動馬達6，其由發電機操作，且一方 面輸送其所產生的電能至可由修正變數u改變阻抗的電阻 14，另一方面輸送其所產生的電能至控制裝置20的全部 電機和電子零組件，以將電能供給至該等零組件。以此方 式，控制裝置20可整合在梭子3 0內，成爲自行維持（自 給自足）的系統。 圖3示意地顯示控制裝置2 0之基本零組件的電力供 -15- 201037111 給源。由發電機操作的電動馬達6所產生的電壓，被供給 至電阻14。整流器15並聯地連接至電阻，整流器15將電 壓整流並使電壓穩定，並將電壓供給至電儲存器16、供給 至整合在一起的計算元件1 2及緯紗帶停止運動元件1 7、 和同樣地供給至傳送/接收裝置1 3。此處的電儲存器1 6被 設計成電容，但也可包含蓄電器或線圈。電阻14也可配 置在整流器1 5的下游。 控制裝置20也包含緯紗帶停止運動元件1 7，其基於 偏斜信號5 a監視帶偏斜機構3的位置，且當相對於帶偏 斜機構3之靜止位置3 a的最小偏斜不足時，緯紗帶停止 運動元件17會發出警示信號BE。該警示信號BE表示緯 紗帶斷線或緯紗帶筒管1已用盡。 此外，緯紗帶停止運動元件1 7監視緯紗帶筒管I的 直徑，其可由緯紗帶2從緯紗帶筒管1的一端運動至另一 端有多快而推導，熟悉該項技藝人士稱之爲「橫越（ traversing)」。緯紗帶筒管1的直徑愈小，則「橫越」 發生得愈快。緯紗帶2的「橫越」，在帶偏斜機構3上產 生橫越擺動〇S ( cf)。在偏斜信號5a中可注意到此橫越 擺動，且緯紗帶停止運動元件〗7能檢測此橫越擺動。橫 越擺動〇S ( cf)以橫越頻率cf擺動。緯紗帶停止運動元 件1 7從橫越擺動〇S ( cf)量測該橫越頻率Cf，且和上極 限値比較。該極限値是表示緯紗帶筒管的直徑已落至臨界 値的一種量度。在該臨界値時，只剩很少的緯紗帶2層還 捲繞著，所以即將需要更換緯紗帶筒管。因此’如果緯紗 -16- 201037111 帶停止運動元件1 7檢測到橫越擺動〇S ( cf)的頻率cf增 加至上極限値時，緯紗帶停止運動元件1 7會發出緯紗帶 筒管更換信號CS。該更換信號CS警示操作者，即將更換 緯紗帶筒管。 在緯紗帶2於帶偏斜機構3上橫越期間，緯紗帶2沿 著帶引導區段3b移位。爲了提供對橫越擺動OS ( cf)的 較高檢測性，設計帶引導區段3b的幾何形狀（例如設置 0 適當的曲率），以便能放大帶偏斜機構3的橫越擺動0S (cf)。 再者，控制裝置20包含傳送接收裝置13，用於和圓 形梭織機40之機器控制器21的傳送接收裝置23進行無 線通訊。 爲了進一步說明，現在參考圖4。圖4示意地顯示圓 形梭織機4 〇包含多個本發明的梭子3 0，梭子3 0設有控制 裝置20。該等梭子30沿著圓形簧片[筘（reed)，未示]中的 〇 軌道運動，且每一者輸送一緯紗帶至正在織造之織物9的 織邊9a。爲了更清楚’圖4省略了圓形梭織機的習知且最 初在EP 7 8 7226已描述過的零件。 使用他們的傳送接收裝置1 3，控制裝置2 0接收來自 圓形梭織機40之機器控制器21的傳送接收裝置23之指 令變數w (用於調整個別帶張力f S和帶偏斜機構3的所 欲位置），並將該等指令變數w傳至計算元件1 2，以執 行對應的運算。在相反的方向，控制裝置2 〇的傳送接收 :置1 3分別發送帶偏斜裝置3的現行位置和由該等現行 -17- 201037111 位置推導出的統計學資料、和/或選擇性地緯紗帶停止運 動元件17的警示信號BE和緯紗帶筒管更換信號CS’分 別至圓形梭織機4〇的機器控制器2 1。 使用寬度保持裝置10，以平坦地摺疊圓形梭織機40 所生產的管狀織物9。機器控制器2 1持續地或在預定的時 間間隔，以長度量測裝置（未示）檢測被平坦摺疊之管狀 織物9的現行寬度X。整合在機器控制器21內的計算元件 22，將平坦摺疊之管狀織物的現行寬度X和最大寬度做比 較，如果超過該最大寬度，則計算元件22計算指令變數 w，該指令變數w導致增加在梭子上的緯紗帶張力FS。因 爲緯紗帶張力FS和管狀織物9的寬度X成反比，所以管 狀織物9會再度採用公稱寬度（選擇性地考慮公差範圍） 。經計算後的指令變數從計算元件2 2經由傳送接收裝置 23被傳送至梭子30的控制裝置20。計算元件22也將管 狀織物的現行寬度X和最小寬度相比較，如果不足該最小 寬度’則將指令變數w的値傳輸至梭子3 0的控制裝置20 ’該等値導致減少梭子30上的緯紗帶張力FS。 【圖式簡單說明】 以非限制性的例示性實施例爲基礎，參考附圖，詳細 地圖解本發明。附圖爲： 圖1顯示圓形梭織機之梭子的示意圖，該梭子設有本 發明的裝置，用於控制緯紗帶張力； 圖2顯示圖丨之梭子的詳細示意圖； -18- 201037111 圖3顯示控制裝置和其電力供給源的示意方塊圖，藉 由發電機操作的電動馬達供給電力；和 圖4顯示本發明之圓形梭織機的示意圖，具有其所生 產之管狀織物之織邊的執行控制。 【主要元件符號說明】 1 :緯紗帶筒管 1 a :軸桿 2 :緯紗帶 3b :帶引導區段 3 a :靜止位置 4 :彈簧 5 ’·偏斜感測器 5 a :偏斜信號 6 :電動馬達 7 :制動扭矩 9 a :織邊 9 :管狀織物 1 〇 :寬度保持裝置 1 2 :計算元件 1 3 :傳送接收裝置 1 4 :電阻 1 5 :整流器 1 6 :電儲存器 -19- 201037111 1 7 :緯紗帶停止運動元件 20 :控制裝置 2 1 :機器控制器 22 :計算元件 23 :傳送接收裝置 30 :梭子 4 0 :(圓形）梭織機 BE :警示信號 cf :橫越頻率 C S :更換信號 F R :恢復力 F S :緯紗帶張力 0 S ( cf ):橫越擺動 u :修正變數 w :指令變數 X :現行寬度 y :控制變數 -20-201037111 VI. Description of the Invention: [Technical Field] The present invention relates to a device for controlling the tension of a weft tape on a shuttle of a circular shuttle loom, wherein the shuttle comprises a belt deflection mechanism, and a weft belt bobbin can be disposed. The weft tape can be ejected from the weft tape bobbin and guided past the skewed mechanism. Thereby, the belt deflection mechanism is deflected away from the rest position against the restoring force by the weft tape tension occurring during the release of the weft tape. With skew 0 The position of the mechanism depends on the weft tension and restoring force. Further, the present invention includes a shuttle for a circular shuttle loom and a circular shuttle loom provided with the shuttle, the shuttle being provided with the weft belt tension control system. [Prior Art] A circular shuttle loom is used to produce a tubular fabric. An important area of application for circular shuttle looms is the production of high-toughness tubular fabrics from stretched plastic bands. These high toughness tubular fabrics can be used to produce packages, such as for packaging bulk materials. For example, the circular knitting machine has been described in the European Patent No. EP787226, the inventor of the present invention, and the circular knitting machine has proven its price in the world for many years. The description of the European case is included in the case for reference. European Patent No. EP 7 8 7226 describes a basic functional group of a circular shuttle loom, in particular a plurality of profiled shafts which are arranged to form a circle around a circular reed and each of which has a plurality of Healds and outer hems for guiding a portion of the two warp yarn assemblies in a circular configuration in each case, alternating upward and downward movements by rotating the main shaft, using -5- 201037111 respectively forms a so-called weaving shed or walking shed. The spindle shaft drives the shuttle in the circular spring by the rotation of the plate cam. The shuttles move in the travel shed in each case. Each shuttle supports a bobbin having a weft tape that is conveyed to the selvedge. The tubular fabric thus formed is pulled away by the fabric pulling device. In the earlier circular shuttle weaving machine, the fabric pulling device was directly driven by being connected to the spindle shaft of the shuttle loom via a gear mechanism. This has the disadvantage that even if the weft tape monitoring mechanism is provided, but the weft tape is broken or the weft tape bobbin has been used up, the weft tape may be mistaken, and such mistakes may result in a thinner place in the fabric. . The weft tape monitoring mechanism responds to the detected weft band error ' immediately transmits a stop signal to the motor in the machine for driving the spindle bar of the circular shuttle loom and the fabric puller. However, due to the inertia force, the motor cannot be suddenly stopped, but is further rotated by the large inertia force acting on the spindle shaft. However, this also involves the pulling of the fabric, since at least one weft tape is missing, so that only a few weft yarns are woven into each warp yarn length unit after the shuttle cycle. In the case of European Patent No. EP78 7226, this problem was solved by the separated motor. The motor drives at least the pull-out roller and (optionally) a bundle of fabric via a gear mechanism. The rate of rotation of the motor is computer controlled via a rate regulation device. The computer is coupled to the main drive of the circular shuttle loom via a pulse generator or the like to generate pulses proportional to the rate of rotation of the circular shuttle loom or the spindle shaft, respectively. 201037111 SUMMARY OF THE INVENTION According to the present invention, the fabric density can be kept constant even when a weft tape failure occurs. However, the solution provided in EP78 7226 only controls the density of the fabric in the event of a weft belt failure. Both warp and weft yarns or weft yarns are subjected to tensile stress during weaving. The fabric pattern of the tubular fabric produced is essentially dependent on the tension in the yarn or band. The warp tape is guided past the so-called pull-in roll, 0 by pulling in the roll and at an adjustable braking torque. Auxiliary, the tensile stress (warp tension) is imparted to the warp tape. The spring-loaded brake lining is usually slid directly around the weft bobbin to complete the tensile stress (warp tension) of the warp tape. Handling and adjusting this mechanical weft brake requires experience and care. Each bobbin material and liner pattern have different coefficients of friction. The issue of alternative brake lining materials often occurs. In some applications, the coefficient of friction is altered due to increased contamination and weaving dust during the job. In addition, the weft tape material has the risk of being damaged by the sliding brake lining. Q Therefore, this conventional system can hardly guarantee a constant weft tension; secondly, when the machine is running (that is, the shuttle rotates inside the machine), even the instantaneous weft tension is not controlled. Another factor influencing the tension of the weft tape is the instantaneous velocity of the weft bobbin produced by the current diameter of the weft bobbin. The rate of rotation increases until the end of the bobbin, reaching several times the initial rate of rotation of the full bobbin. Therefore, due to the friction effect, the increase in the tension of the weft tape is not proportional to the end of the bobbin. All of these effects on the tension of the weft tape and their changes are reflected in the fabric produced in the following form 201037111: Too low weft tension The yarn loop of the weft tape is formed; the fabric is tight; that is, when the weft tension is too high, the stomach 1 of the tubular fabric is reduced. In order to be able to produce high-quality fabrics with small variations in width (peripheral variability) but with grommet formation, it is desirable to monitor and control the weft belt tension during operation or at least at predetermined intervals. Accordingly, it is a primary object of the present invention to provide a device for controlling the tension of a weft tape on a shuttle of a circular shuttle loom, whereby a high quality tubular fabric having a constant perimeter and a perfect fabric pattern can be produced. As described above, it is also known to provide a weft tape monitoring mechanism on a circular shuttle loom that responds to the detected loss of the weft tape and immediately transmits a stop signal to the motor that drives the spindle rod of the circular shuttle loom, and A drive signal that selectively transmits a stop signal to the fabric pull-out device. A circular weaving machine incorporating a device for monitoring a weft tape is disclosed in, for example, European Patent No. EP 7 8 6026, the entire disclosure of which is incorporated herein by reference. In the apparatus for monitoring the weft yarns on the circular shuttle loom, the weft yarns are discharged from the respective bobbins of the shuttle, the shuttles rotating in the weaving shed along the track formed by the circular reeds, and the like The weft yarns are conveyed to the edge of the fabric of the produced circular fabric; the scanning mechanism monitors each of the weft tapes to produce an electrical control signal in the event of loss of the weft tape. This is because the electrical control signal is generated by the magnetic sensor, which is disposed in the area of the track of the shuttle and is matched with the permanent magnet supported by each shuttle; wherein the permanent magnet is disposed on the pivoting lever On the other hand, the lever is deflected from the pulled-out weft tape against the action of the spring reset mechanism, and is held outside the operative connection with the magnetic sensor for resetting The mechanism reaches its final position (if the weft belt is lost). This final position produces an operative connection of the permanent magnet to the magnetic sensor to produce an active control signal. This device for monitoring the tape has proven its price in the world of circular shuttle looms for many years. However, it would be desirable to have a mechanically simpler device for monitoring the weft tape, which involves a lower component cost and is therefore smaller but still reliable. Accordingly, a second aspect of the present invention is to provide such an improved apparatus for monitoring a weft tape on a circular shuttle loom. In the case of a broken yarn (breaking of the weft tape), monitoring of such a weft tape is particularly required. If the strip material on the weft bobbin regularly approaches its end, this will be detected automatically and just before the real end. At this point, additional weft tape monitoring has achieved this. One possibility to perform additional weft tape monitoring is a light obstacle, the Q of which is guided in the weft bobbin sleeve. If the bottom layer of the bobbin is released, the reflector strip is released and the sensor changes. Another possibility is to use a contrast sensor that recognizes the contrast between the bright bobbin material and the dark bobbin sleeve when the bottom layer is released. From the document AT 504 109, a method and apparatus for forming a weft tape bobbin replacement control signal on a circular shuttle loom is known. This allows the immediate and precise detection of the need to replace the weft tape bobbin, so that the weaving process can be interrupted and the individual weft tape bobbins can be replaced. It should be reliable to show that the required bobbin replacement is also performed at high operating rates. The proposed solution to this problem is based on the decision of the time integral of the angular velocity or angular velocity of the yam-9 - 201037111, where the speed signal is fed to the central calculation and evaluation unit, which correlates the speed signal or its fluctuations and limits. When compared, and when the limit 到达 is reached, a weft tape bobbin replacement control signal is generated. A third aspect of the invention comprises generating a trustworthy monitoring of the level of the weft tape bobbin on the shuttle in the circular shuttle loom. This monitoring can be performed with low component costs and, optionally, when the weft tape bobbin is quickly depleted, a weft tape bobbin replacement signal is produced. The present invention solves the problems caused by the apparatus for controlling the tension of the weft tape on the shuttle of the circular shuttle loom as characterized by the feature of claim 1 of the patent application, and for solving the problems caused by the embodiment of the invention having the features of the subsidiary problem. The control device of the present invention can be integrated into the shuttle. The shuttle provided in this manner is used in the circular shuttle loom of the present invention. In the apparatus for controlling the weft band tension on the shuttle of the circular shuttle loom according to the present invention, the shuttle has a skew mechanism and may be provided with a weft tape bobbin from which the weft tape can be discharged and Guided over the belt deflection mechanism whereby the belt deflection mechanism can be deflected from the rest position via the weft belt tension resisting restoring force occurring during the release of the weft belt, and the position of the belt deflection mechanism depends on The weft tape tension and the restoring force. The control device includes: a skew sensor for detecting a current position of the skew mechanism and for generating a skew signal as a function of the current position of the skew mechanism; an analog or digital computing component, available The deflection signal as a control variable is supplied to the computing element; a variable electromechanical load, whereby a variable braking torque is applied to the weft tape bobbin according to the correction variable; wherein the meter is calculated from The skew signal supplied to the computing element or the statistical amount of the skew signal (eg, average 値), calculating the correction variable for adjusting the variable electromechanical load, such that the position of the skew mechanism is desired値 and therefore the hope of the tension of the weft belt can be adjusted by themselves or towards themselves. It should be understood that the term "variable electromechanical load" includes at least one electrical component and at least one mechanical component that mates with the electrical component. Wherein the at least one mechanical component is capable of applying a braking torque on the weft belt bobbin. The electrical component cooperates with the mechanical component such that a change in a parameter (eg, height, or frequency of the current, or voltage, or its signal form) between the electrical components causes the braking torque applied by the mechanical component on the weft tape bobbin. change. In order to adapt the control device to changes in operating parameters quickly, for example when the circular shuttle loom is adapted for use with different strip materials or to change the gauge for the desired weft tension, it is conceivable to define the position of the deflection mechanism. The desired command variable can be supplied to the controller. The number of commandable Qs that can be supplied is preferably adjustable during operation. In the control device of the maintenance-free embodiment of the present invention, which is suitable for the rough conditions prevailing during the operation of the circular shuttle loom, the variable electromechanical load comprises an electric motor which can be rotated by the weft belt bobbin Operated by the interrupter and fed with a variable resistor. The electric motor operated by the generator can supply electric power to the control device, so that the control device can be designed as a self-sustaining system that can operate without relying on wires. In a further embodiment of the invention comprising a self-sustaining energy supply control device, an electrical energy store (such as a battery, capacitor, or coil) is provided, which is supplied with electrical energy by an electric motor operated by the generator -11 - 201037111 and The electrical energy store in turn supplies electrical energy to the airborne device. If the impedance of the resistor is constructed to be adjusted according to the correction variable, excellent controllability can be obtained. In the rugged and preferred variant of the invention, the deflecting mechanism comprises a deflectable bow, or a roller having a deflectable axis of rotation, or a deflectable eyelet, the deflectable bow preferably being The ground can be linearly skewed or skewed at its angular position. In an embodiment of the invention, it can be constructed in a mechanically simple yet still reliable manner. The restoring force acting on the belt deflection mechanism can be generated by a spring element or a counterweight or a centrifugal force generated by moving the shuttle. In a preferred embodiment of the invention, the control device includes a weft belt stop motion element that monitors the position of the belt deflection mechanism and that is inferior when the minimum deflection relative to the rest position of the belt deflection mechanism is insufficient The stop motion component sends a warning signal. Therefore, when the line is broken or ended, the signal can be generated in a simple and maintenance-free manner, which is suitable for rough work. In a particularly preferred variant of the invention, the control device comprises a weft thread stop motion element that monitors the position of the belt deflection mechanism, and the weft belt stop motion element detects the traverse swing of the belt deflection mechanism due to the weft belt Caused by traversing from one end of the weft tape bobbin to the other end, and if the frequency of the traverse wobble has characteristically changed to the upper limit 値, the weft tape stop moving element issues a weft tape bobbin replacement signal. In this way, the operator of the circular shuttle loom can be alerted to the fact that the weft belt bobbin needs to be replaced at an appropriate time. In the very robust embodiment of the invention, it can be implemented without the need for additional zero-12-201037111 components. The belt deflection mechanism includes a belt guiding section that is displaced along the belt guiding section during traverse, and the geometric design of the belt guiding section magnifies the traverse oscillation of the belt deflection mechanism. In order to separately transmit the status information of the control device and the status information of the shuttle provided with the control device to the machine control of the circular shuttle loom (without having to set up complicated wires and sliding the contacts for this purpose), and in order to receive the respective from the machine controller Preferably, the control means is provided with a transmitting and receiving means for wirelessly communicating with the machine controller of the circular shuttle loom 0. Due to this configuration, the transmitting and receiving device can receive the command variable from the machine controller and transmit the command variable to the computing device of the control device. Conversely, the transmitting and receiving device can respectively transmit the current position of the skewing mechanism and the statistical data derived from the current position, and/or selectively transmit the warning signals of the weft tape stop moving component and The weft with the bobbin changing device to the machine controller. In all of the above embodiments, the control device for controlling the weft band tension 本 of the present invention is adapted to be integrated in the shuttle of the circular shuttle loom. Wherein the shuttle comprises a deflecting mechanism and may be provided with a weft threaded bobbin from which the weft tape can be ejected and guided past the belt deflection mechanism, whereby the belt deflection mechanism can be discharged The weft tape tension occurring during the weft tape is deflected from the rest position against the restoring force, and the position of the belt skew mechanism depends on the weft tape tension and the restoring force. If the circular shuttle loom of the present invention is provided with a shuttle, the circumference of the tubular fabric produced by the circular shuttle loom or the width thereof can be controlled after the fabric is flatly folded using the width retaining means. For this purpose, the circular shuttle -13 - 201037111 machine controller of the loom periodically or continuously detects the current width of the flat folded tubular fabric. If the maximum width is exceeded, the 値 of the command variable is transmitted to the control of the shuttle, resulting in an increase in the tension of the weft tape on the shuttle. Similarly, if less than the minimum width 'the machine controller transmits the 値 of the command variable to the control device of the shuttle', the tension of the weft tape on the shuttle is reduced. [Embodiment] Referring to Figures 1, 2, an embodiment of a device 20 for controlling the weft tape tension FS on the shuttle 30 of a circular shuttle loom is illustrated below. Control device 20 is integrated within shuttle 30. The shuttle 30 includes a deflecting mechanism 3. In the illustrated embodiment, the belt deflector is constructed to form an arcuate shape that is deflectable at its angular position. Other embodiments of the deflecting mechanism can be linearly deflectable bows, rollers with deflectable axes of rotation, or deflectable apertures. The shuttle 30 is provided with a weft threaded bobbin 1 which is rotatably mounted to the shaft 1a. The weft tape 2 is guided from the weft tape bobbin 1 to the deflecting mechanism 3, and the weft tape 2 is discharged from the weft tape bobbin 1 during the operation, and the weft tape 2 is conveyed to the selvage of the woven tubular fabric. 9a. Since the braking torque 7 acts on the shaft 1a, the weft belt tension FS becomes large during the release of the weft tape 2. This weft tape tension FS tends to deflect the belt deflection mechanism 3 from its rest position 3a. The deflection of the deflecting mechanism 3 is fixed to the restoring force FR generated by the shuttle 30 and the spring 4 with the skew mechanism 3. In another embodiment in which the restoring force FR is generated by the assistance of the spring 4, the centrifugal force generated by the weight or the movement of the shuttle 30 also produces the recovery force FR of -14-201037111. Therefore, the current position of the skew mechanism 3 depends on the weft belt tension F S and the restoring force F R . The current position of the belt deflection mechanism 3 is detected by the skew sensor 5, which produces a skew signal 5a as a function of the current position of the skew mechanism 3 . In the illustrated embodiment, the skew sensor 5 is designed as an angle sensor. The skew signal 5a is supplied to the analog or digital computing element 1 2 as a control variable y. The calculation component 1 2 ❹ ' is designed such that the calculation component 12 calculates the correction variable u from the statistical value (e.g., average 値) of the skew signal 5 a or the skew signal 5 a and the command variable w. Here, the command variable W defines the desired position of the position with the skew mechanism 3; the command variable w is also a measure of the desired weft band tension F S due to the correlation between the position of the skew mechanism 3 and the weft tape tension FS. The correction variable adjusts the braking torque 7 acting on the shaft 1a of the weft threaded bobbin 1, so that the position of the belt deflection mechanism 3 is self-adjusted to the predetermined position of the command variable w, or at least close to the predetermined position. More specifically, the correction variable Q u adjusts the variable electromechanical load which applies a variable braking torque 7 to the weft belt bobbin 1 in accordance with the correction variable u. The variable electromechanical load comprises an electric motor 6 mounted to a shaft la, which is operated by a generator and which on the one hand delivers the electrical energy generated by it to a resistor 14 which can change the impedance by a correction variable u, on the other hand delivers it Electrical energy is supplied to all of the motor and electronic components of control device 20 to supply electrical energy to the components. In this way, the control unit 20 can be integrated into the shuttle 30 to become a self-sustaining (self-sufficient) system. Figure 3 shows schematically the power supply for the basic components of the control unit 20 to -15-201037111. The voltage generated by the electric motor 6 operated by the generator is supplied to the resistor 14. The rectifier 15 is connected in parallel to the resistor, the rectifier 15 rectifies the voltage and stabilizes the voltage, and supplies the voltage to the electrical storage 16, to the integrated computing element 12 and the weft stop motion element 17, and likewise It is supplied to the transmitting/receiving device 13 . The electrical reservoir 16 here is designed as a capacitor, but may also comprise an accumulator or a coil. Resistor 14 can also be disposed downstream of rectifier 15. The control device 20 also includes a weft tape stop motion element 177 that monitors the position of the belt skew mechanism 3 based on the skew signal 5a, and when the minimum deflection relative to the rest position 3a of the belt skew mechanism 3 is insufficient, The weft tape stop motion element 17 emits a warning signal BE. The warning signal BE indicates that the weft yarn is broken or the weft belt bobbin 1 has been used up. Furthermore, the weft tape stop moving element 17 monitors the diameter of the weft tape bobbin I, which can be derived from how fast the weft tape 2 moves from one end of the weft tape bobbin 1 to the other end, familiar to those skilled in the art. Traversing. The smaller the diameter of the weft tape bobbin 1, the faster the "crossing" occurs. The "traversal" of the weft tape 2 produces a traverse wobble 〇S (cf) on the skew mechanism 3. This traverse swing can be noticed in the skew signal 5a, and the weft tape stop motion element 7 can detect this traverse swing. The oscillating 〇S (cf) is oscillated across the frequency cf. The weft tape stop motion element 17 measures the traverse frequency Cf from the traverse wobble 〇S (cf) and compares it with the upper limit 値. This limit 値 is a measure indicating that the diameter of the weft tape bobbin has fallen to a critical enthalpy. At this critical enthalpy, only a few layers of weft tape are left to be wound, so the weft tape bobbin will soon need to be replaced. Therefore, if the weft yarn -16-201037111 with the stop motion element 17 detects that the frequency cf across the swing 〇S (cf) increases to the upper limit ,, the weft tape stop moving member 17 issues the weft tape bobbin replacement signal CS. The replacement signal CS alerts the operator that the weft belt bobbin will be replaced. During the traverse of the weft tape 2 on the belt deflection mechanism 3, the weft tape 2 is displaced along the belt guiding section 3b. In order to provide a higher detectability of the traverse oscillating OS (cf), the geometry of the belt guiding section 3b is designed (for example, setting a suitable curvature of 0) so as to amplify the traverse oscillation of the belt skew mechanism 3 (cf) . Further, the control device 20 includes a transfer receiving device 13 for wireless communication with the transfer receiving device 23 of the machine controller 21 of the circular shuttle loom 40. For further explanation, reference is now made to FIG. Fig. 4 shows schematically that the circular weaving machine 4 〇 comprises a plurality of shuttles 30 of the invention, and the shuttle 30 is provided with a control device 20. The shuttles 30 move along a 〇 track in a circular reed [reed, not shown], and each conveys a weft tape to the woven edge 9a of the fabric 9 being woven. For the sake of clarity, the parts of the circular shuttle loom and which have been previously described in EP 7 8 7226 are omitted. The control device 20 receives the command variable w of the transfer receiving device 23 from the machine controller 21 of the circular shuttle loom 40 (for adjusting the individual belt tension f S and the belt skew mechanism 3 using their transfer receiving device 13). The desired position) is passed to the computing component 12 to perform the corresponding operation. In the opposite direction, the transmission of the control device 2: receiving 1 3 respectively transmits the current position of the deflection device 3 and the statistical data derived from the current -17-201037111 position, and/or selectively weft The warning signal BE with the stop motion element 17 and the weft tape bobbin replacement signal CS' are respectively sent to the machine controller 21 of the circular shuttle loom. The width maintaining device 10 is used to flatly fold the tubular fabric 9 produced by the circular shuttle loom 40. The machine controller 21 detects the current width X of the flat folded tubular fabric 9 by a length measuring device (not shown) continuously or at predetermined time intervals. The computing element 22 integrated within the machine controller 21 compares the current width X and the maximum width of the flat folded tubular fabric. If the maximum width is exceeded, the computing component 22 calculates an instruction variable w, which results in an increase in The weft tape tension FS on the shuttle. Since the weft tape tension FS is inversely proportional to the width X of the tubular fabric 9, the tubular fabric 9 will again adopt a nominal width (selectively considering the tolerance range). The calculated command variable is transmitted from the computing element 2 2 to the control device 20 of the shuttle 30 via the transmitting and receiving device 23. The computing element 22 also compares the current width X of the tubular fabric with the minimum width, and if less than the minimum width ', transfers the 指令 of the command variable w to the control device 20 of the shuttle 30' which results in a reduction of the weft on the shuttle 30. Belt tension FS. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail with reference to the accompanying drawings, by way of non-limiting exemplary embodiments. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a shuttle of a circular shuttle loom provided with the apparatus of the present invention for controlling the tension of the weft belt; FIG. 2 is a detailed schematic view of the shuttle of the figure; -18- 201037111 A schematic block diagram of a control device and its power supply source, powered by an electric motor operated by a generator; and FIG. 4 shows a schematic view of a circular shuttle loom of the present invention having an execution control of the selvage of the tubular fabric produced thereby . [Main component symbol description] 1 : Weft tape bobbin 1 a : Shaft 2 : Weft tape 3b : Belt guide section 3 a : Rest position 4 : Spring 5 '· Skew sensor 5 a : Skew signal 6 : electric motor 7 : braking torque 9 a : selvedge 9 : tubular fabric 1 〇 : width holding device 1 2 : calculation element 1 3 : transmission receiving device 1 4 : resistance 1 5 : rectifier 1 6 : electric storage -19- 201037111 1 7 : Weft tape stop moving element 20 : Control device 2 1 : Machine controller 22 : Calculation element 23 : Transmission receiving device 30 : Shuttle 4 0 : (circular) shuttle loom BE : Warning signal cf : Transverse frequency CS : Replacement signal FR : Restoring force FS : Weft belt tension 0 S ( cf ): Traverse oscillation u : Correction variable w : Command variable X : Current width y : Control variable -20-