1264294 (1) 九、發明說明 【發明所屬之技術領域】 本發明係關於折疊式傘，關於有效適用於使用例如4 折式或3折式的主傘骨之多段式折疊傘者。 【先前技術】 例如，多段式折疊傘係如圖1 〇所示，使用4折式主 ^ 傘骨40’所構成，主傘骨40’係將後段主傘骨41’、第1與 第2之2支分割中段主傘骨42’、43’、以及前段主傘骨44 予以能屈伸地鉸鏈連結而構成的。 在同圖中，支撐傘骨45之前端部鉸鏈連結於後段主 傘骨4 1 ’的中間部。在後段主傘骨4 1 ’的底端部係鉸鏈連結 於下傘軸22，支撐傘骨45的底端部係鉸鏈連結於上傘軸 21。藉此，形成連動於下傘軸22的上下移動而使主傘骨 4 0 ’屈曲/伸展（屈伸）之一種縮放式連結機構。伴隨此主 • 傘骨4 0，的屈伸，進行傘之開關。 上傘軸21固定於伸縮式中棒10之上部，下傘軸22 係以上傘軸21的下方可自由滑動地導引於上述中棒1〇。 中棒1 〇係嵌套管狀之5段伸縮式者，在上端安裝著拐尖 11，在下端安裝著傘握柄12。又，安裝有用來將下傘軸 22可自由卡止脫離地卡止於開傘位置之撥動鈕1 3。 在支撐傘骨45與第1分割中段主傘骨42’之間，藉由 架橋裝設線狀連桿5 1，形成一種平行連結機構。又’在第 1分割中段主傘骨42’與前段主傘骨44之間，亦藉由架橋 -4- (2) 1264294 裝設線狀連桿5 3，形成一種平行連結機構。且，在後段主 傘骨4 1，與第2分割中段主傘骨4 3之間架橋裝設線彈簧（ 彈性用直線）5 2，並且此線彈簧5 2之中間部可滑動地被 拘束於第1分割中段主傘骨4 2 ’之中間部。藉由此連桿5 1 、5 3及線彈簧5 2，使主傘骨4 0 ’的屈伸動作追隨下傘軸 22之上下移動，並且對於該屈伸動作賦予彈性作動。 在此情況，在後段主傘骨4 1與支撐傘骨4 5間的鉸鏈 Φ 連結部分、與將線彈簧52可滑動地拘束於第1分割中段 主傘骨42’之部分，如同圖部分放大顯示般，均安裝有鉸 鏈銷66。其他的鉸鏈連結部分亦同樣地安裝著鉸鏈銷。特 別是後段主傘骨4 1 ’，在其兩端部與中間部的3部位所具 有鉸鏈連結部分，在這些部位分別安裝有上述鉸鏈銷66。 除此以外，在後段主傘骨4 1 ’，設有使線狀連桿5 1的端部 勾掛卡止用之通過孔等。 因此，後段主傘骨4 1 ’及第1分割中段主傘骨42 ’係如 • 圖1 1所示，使用U字形剖面狀之溝槽傘骨來構成的。此 溝槽傘骨係將鋁等的金屬薄板折彎加工成U字形者，由於 具有剛性，並且對於設置用來安裝上述鉸鏈銷66的軸孔 67極爲有效，故多數使用作爲傘的骨材特別是主傘骨或中 段傘骨的骨材（參照例如，日本特開2 0 0 3 - 1 8 9 9 1 6號公報 )° [專利文獻1]日本特開2003-189916 【發明內容】 -5- (3) 1264294 [發明所欲解決之課題] 但，在上述折疊式傘，會有下述問題。 即，以溝槽傘骨所構成的後段主傘骨4 1 ’’雖具有剛 性，但一旦受到強風等所吹襲而產生彎曲時，容易由該彎 曲部分折斷之問題產生。也就是’存在有雖有剛性但脆且 容易折斷之問題。位於主傘骨40’的底端之後段主傘骨41’ 係在主傘骨4 0 ’中，最被要求具有強度之部位。但，此後 • 段主傘骨4 1 ’受到支撐傘骨45的前端部連結於其中間部， 造成大的彎曲荷重施加於該連結部，而形成容易折斷之問 題。 又，以溝槽傘骨所構成的後段主傘骨4 1 ’對於傘的折 疊方向具有一定的厚度，但也會有該厚度阻礙將傘折疊成 小（細或薄）之問題。且，亦存在有溝槽傘骨製作工時多 且成本局之問題。 本發明係有鑒於上述問題而開發完成之發明，其目的 ^ 在於提供具有優良之低成本化能力，且受到例如強風等， 即使在後段主傘骨產生一些彎曲，也不容易折斷，具備維 持傘功能的強韌性，且亦可將傘折疊成較以往更小之折疊 式傘。 本發明之上述以外的目的及結構，可由本說明書之際 載及圖面可明白得知。 [用以解決課題之手段] 本發明的手段係以下述（1 )作爲特徵。 -6 - (4) 1264294 (1 ) 一種折疊式傘，係具有固定於伸縮式中棒的上 部之上傘軸；以上傘軸的下方可自由滑動地導引於上述中 棒之下傘軸；將後段主傘骨、中段主傘骨及前段主傘骨加 以鉸鏈連結所構成之主傘骨；及前端部鉸鏈連結於上述後 段主傘骨的中間部之支撐傘骨，並且將前述後段主傘骨的 底端部與前述支撐傘骨的底端部分配成上傘軸與下傘軸加 以鉸鏈連結之折疊式傘，其特徵爲：上述後段主傘骨係大 • 致呈圓形剖面之線狀細棒，在其兩端加工形成有扁平部， 在此扁平部形成用來將中段主傘骨與傘軸予以鉸鏈連結之 軸孑L 。 在上述手段，以下述手段作爲實施形態特別有效。 (2 )如上述手段（1 )，其中使用鋼製線材作爲線狀 細棒。 (3 )如上述手段（1 )或（2 )，其中中段主傘骨係 由被鉸鏈連結之第1與第2之2支分割中段主傘骨所構成 籲的。 (4) 如上述手段（3)，其中在後段主傘骨與第2分 割中段主傘骨之間架橋裝設有線彈簧（w i r e s p r i n g )，並 且藉由將此線彈簧的中間部與第1分割中段主傘骨的中間 部一同滑嵌插通之環狀圈構件，使線彈簧在第1分割中段 主傘骨的中間部可滑動地拘束著。 (5) 如上述手段（1)〜（4)中任一手段，其中中 段主傘骨係以大致呈圓形剖面的線狀細棒所構成’並且在 與後段主傘骨連結側之端部冠蓋套合有合釘（d 〇 w e 1 )配 (5) 1264294 件，在與前段主傘骨連結側的端部加工形成扁平部，在此 扁平部設置與前段主傘骨進行鉸鏈連結用之軸孔。 (6 )如上述手段（1 )〜（5 )中任一手段，其中在 供支撐傘骨的前端部鉸鏈連結之後段主傘骨的中間部’冠 蓋套合有合釘配件。 (7 )如上述手段（1 )〜（6 )中任一手段，其中在 供支撐傘骨的前端部鉸鏈連結之後段主傘骨的中間部，加 • 工形成扁平部，在此扁平部設置與上述支撐傘骨進行鉸鏈 連結用之軸孔。 (8 )如上述手段（1 )〜（7 )中任一手段，其中以 大致呈圓形剖面之線狀細棒構成支撐傘骨，並且在其兩端 加工形成進行鉸鏈連結用之扁平部。 (9)如上述手段（1) 、 （2) 、 （5)〜（8)中任 一手段，其中具備：將後段主傘骨、中段主傘骨、前段主 傘骨的3支主傘骨予以鉸鏈連結所構成之3折式主傘骨。 參 （10)如上述手段（1)〜（3) 、（5)〜（9)中任 一手段，其中爲了對於主傘骨的屈伸動作，賦予彈性作動 (spring action )，而將架橋裝設於後段主傘骨與前段主 傘骨間之線彈簧可滑動地拘束於中段主傘骨的中間部，並 且該卡止部分係在線彈簧的中間部折彎形成迂迴進入到中 段主傘骨之環狀（1 ο 〇 P )部。 [發明效果] 能夠提供具有優良之低成本化能力，且受到例如強風 (6) 1264294 等，即使在後段主傘骨產生一些彎曲，也不容易折斷，具 備維持傘功能的強韌性，且亦可將傘折疊成較以往更小之 折疊式傘。 本發明之上述以外的作用/效果，可由本說明書之際 載及圖面可明白得知。 【實施方式】 # 圖1及圖2係顯示本發明的第1實施形態之折疊式傘 的骨架結構。圖1係顯示將該骨架結構屈曲成一半之半關 傘（或半開狀態）狀態，圖2係顯示將該骨架結構完全伸 展之開傘狀態，符號1 5顯示傘布。 同圖所示的折疊式傘，係使用4折式主傘骨40所構 成，該主傘骨40係將後段主傘骨41、第1與第2之2支 分割中段主傘骨42、43、及前段主傘骨44可屈伸地加以 鉸鏈連結而成的。 • 支撐傘骨45的前端部鉸鏈連結於後段主傘骨4 1的中 間部。後段主傘骨4 1的底端部鉸鏈連結於下傘軸2 2，支 撐傘骨45的底端部鉸鏈連結於上傘軸21。藉此，形成連 動於下傘軸22的上下移動而使主傘骨40屈曲/伸展（屈 伸）之一種縮放式連結機構。伴隨此主傘骨40的屈伸， 進行傘之開關。 上傘軸21固定於伸縮式中棒10之上部，下傘軸22 係以上傘軸21的下方可自由滑動地導引於上述中棒10。 中棒1 0係將5支管以嵌套方式予以同軸聯結之5段滑動 -9- (7) 1264294 伸縮式者，在最伸長與最縮短之2狀態下，分別被按壓· 鎖定（未圖示）。在此中棒1 0的上端安裝著拐尖1 1，在 下端安裝著傘握柄]2。又，安裝有用來將下傘軸22可自 由卡止脫離地卡止於開傘位置之撥動鈕1 3。 在支撐傘骨45與第1分割中段主傘骨42之間，藉由 架橋裝設線狀連桿5 1，形成一種平行連結機構。又，在第 1分割中段主傘骨42與前段主傘骨44之間，亦藉由架橋 # 裝設線狀連桿5 3，形成一種平行連結機構。且，在後段主 傘骨4 1與第2分割中段主傘骨43之間架橋裝設線彈簧（ 彈性用直線）5 2，並且此線彈簧5 2之中間部可滑動地被 拘束於第1分割中段主傘骨42之中間部。藉由此連桿5 1 、53及線彈簧52，使主傘骨40的屈伸動作追隨下傘軸22 之上下移動，並且對於該屈伸動作賦予彈性作動。 又，如圖1中部分放大所示，在後段主傘骨41的中 間部，冠蓋套合有合釘配件6 1，在此合釘配件61安裝著 ® 鉸鏈銷66。藉由此鉸鏈銷66，將支撐傘骨45之前端部予 以鉸鏈連結著。第1分割中段主傘骨42的兩端與第2分 割中段主傘骨43之前端也分別形成根據合釘配件62、63 、6 5之鉸鏈連結部。 線彈簧5 2係其底端連結於後段主傘骨4 1之前端側， 並且其前端鉸鏈連結於獨立的合釘配件（連接配件）64。 此合釘配件64係其一端與上述線彈簧5 2的前端鉸鏈連結 ，而另一端鉸鏈連結於冠蓋套合於第1分割中段主傘骨4 2 的前端的合釘配件6 3之前端。 -10- (8) 1264294 線彈簧5 2之中間部係如圖1中部分放大所示，藉由 與第1分割中段主傘骨42的中間部一同地滑嵌插通於環 狀連接構件7 1，可滑動地拘束於該第1分割中段主傘骨 42 〇 線彈簧5 2係在該可滑動的範圍內，大致形成直線。 在該直線範圍的兩側形成卡止環狀連接構件7 1的移動之 屈曲部。利用上述環狀連接構件7 1之線彈簧5 2的拘束構 • 造，對於謀求第1分割中段主傘骨42的形狀單純化，爲 非常有效之手段。 圖3係顯示成爲上述骨架結構之主要部分的主傘骨40 之構成零件（41〜44)與支撐傘骨45。主傘骨40係藉由 後段主傘骨41、第1與第2的2支分割中段主傘骨42、 43、及前段主傘骨44之4支主傘骨所構成的。支撐傘骨 45係使用將鋁或鋁合金等的金屬薄板折彎加工成U字形 之溝槽傘骨來加以構成的，在量端部形成用來進行鉸鏈連 ® 結之軸孔67。前段主傘骨44係以細棒狀FRP (纖維強化 樹脂）所構成的，在其底端冠蓋套合著合釘配件65，在其 前端，安裝有露出端頭441。 後段主傘骨4 1及第1與第2的2支分割中段主傘骨 42、43分別使用圓形剖面之線狀細棒具體而言爲鋼線材來 構成的。此鋼線材係能夠使用藉由拉線等以低成本加以量 產提供者。因此，使用大致呈圓形剖面之線狀細棒係大幅 度地有助於主傘骨的低成本化，可大幅度地提昇這種折疊 式傘之低成本化。 -11 - (9) 1264294 後段主傘骨4 1係如圖4的其側面圖與各部之斷面圖 Μ示’使用預定長度之鋼線材來構成的，在其兩端，藉由 沖壓等加工形成有扁平部4 1 1、4 1 2。此扁平部4 1 1、4 1 2 白勺形成係可藉由沖壓或簡單的模具等來高效率地予以進行 °因此，使用大致呈圓形剖面之線狀細棒，不僅有助於該 細棒材料之低成本性，在加工成本面上，亦大幅度地有助 於低成本化。 在一方的扁平部411，設有用來鉸鏈連結於下傘軸22 之軸孔67。在另一方的扁平部412，設有用來與第1分割 中段主傘骨42進行鉸鏈連結之軸孔67、及將線彈簧52的 一端予以卡止連結用之通過孔6 8。又，在中間部，亦藉由 沖壓等加工形成有扁平部4 1 3。在此扁平部4 1 3，設有用 來與上述支撐傘骨45進行鉸鏈連結之軸孔67。包含此扁 平部4 1 3之後段主傘骨4 1的中間部係冠蓋套合合釘配件 6 1來加以補強。 第1分割中段主傘骨42係如圖5之其側面圖及各部 的斷面圖所示，與後段主傘骨4 1同樣地，使用預定長度 之鋼線材來構成的。在此情況，在其兩端分別冠蓋套合有 合釘配件62、63。在底端側（圖的右側）之合釘配件62 ，設有用來將後段主傘骨4 1與連桿5 1進行鉸鏈連結之軸 孔67。在前端側（圖的左側）之合釘配件63，設有將第2 分割中段主傘骨43及合釘配件64與連桿53進行鉸鏈連 結之軸孔67。再者，雖省略圖示，但在合釘配件62、63 亦形成有用來固定傘布之通過孔。 -12- (10) 1264294 在第1分割中段主傘骨4 2之中間部，如圖1部分放 大所示，藉由環狀連接構件7 1，可將線彈簧5 2之中間部 予以可滑動地加以拘束著。藉由此環狀連接構件7 1，線彈 簧5 2未使用合釘配件而被卡止著。 圖6係分別顯示上傘軸2 1與下傘軸22之局部剖面。 如同圖（a )所示，兩傘軸2 1、22分別爲在中央具有透孔 3 1、3 2之環狀轂構件，上傘軸2 1被固定於中棒1 〇的前端 ’下傘軸22被滑動導引於中棒10而進行上下移動。 在上傘軸21，在中央具有透孔31之環狀轂構件的外 側部’複數支（6支）支撐傘骨45的底端藉由環狀樞支線 3 4總括地樞支著。同樣地，如同圖（b )所示，在下傘軸 22’複數支（6支）後段主傘骨41的底端藉由環狀樞支線 3 4總括地樞支著。 主傘骨40及支撐傘骨45分別左右分配成各3支而配 置成放射狀，藉由如此的配置，能夠將傘折疊成扁平（板 狀）。又，雖未圖示，但在全周以等角間隔配置所有的主 傘骨40及支撐傘骨45之情況，傘折疊成圓形（圓柱狀） 〇 在如上述第1實施形態之折疊式傘，使用大致呈圓形 剖面之鋼線來構成。這是由於在其兩端加工形成扁平部 411、412，在此扁平部411、412設置用來與第1分割中 段主傘骨42及下傘軸22進行鉸鏈連結之軸孔67之故。 藉由上述結構，後段主傘骨4 1的構造被一體化而被強化 。此後段主傘骨4 1，其剛性比起以往之使用溝槽傘骨者稍 -13- (11) 1264294 低，但因具備可撓性，且彈性復原力高，所以遇強風 承受過大的荷重時，藉由暫時性變形，能夠迴避該荷 並且在解除該荷重後，恢復到原本的狀態之自我復原 良。 因此，具備有：即使遇到強風等，在後段主傘ΐ 產生一些彎曲，也不會容易折斷，能夠維持傘功能之 性。又，因藉由以鋼線等的線材構成後段主傘骨4 1， ® 縮小對於傘的折疊方向之傘骨的厚度，所以能夠將傘 成較以往小（薄或細）。 例如，如圖6所示，若在將後段主傘骨41與支 骨4 5分配成左右而配置成放射狀的狀態下，鉸鏈連 傘軸21、22的話，能夠折疊成非常薄的形狀。在上 實施形態，分割中段主傘骨42、43也使用鋼線等的 來構成的，這是對於進一步提高主傘骨40的強韌性 疊形狀之緊緻性非常有效。 ® 且，如圖7所示，即支撐傘骨45亦可藉由大致 形剖面的線狀細棒（鋼線）來構成。在此情況，藉由 兩端加工形成用來進行鉸鏈連結之扁平部451、452， 作成不使用合釘配件之一體構造的支撐傘骨45。藉由 傘骨45也以線狀細棒來構成，能夠進一步提高主傘1 的強韌性與折疊形狀之緊緻性。又’藉由使用鋼線等 材，可進一步提昇低成本化能力。 圖8係顯示本發明的第2實施形態之折疊式傘的 結構。同圖所示的折疊式傘，係使用後段主傘骨4 1、 等， 重， 性優 卜41 強韌 能夠 折疊 撐傘 結於 述的 線材 與折 呈圓 於其 能夠 支撐 I 40 的線 骨架 中段 -14- (12) 1264294 主傘骨42、前段主傘骨44之3支主傘骨予以鉸鏈連結所 構成之3折式主傘骨來構成的。 在此第2實施形態，主傘骨40的底端鉸鏈連結於上 傘軸21，支撐傘骨45的底端鉸鏈連結於下傘軸22。藉此 ，當將傘展開時，能夠使主傘骨40完全地沿著傘布（未 圖示）之裏面側。 又，在此第2實施形態，將爲了對於主傘骨40的屈 • 伸動作賦予彈性作動而架橋裝設之線彈簧52的中間部可 滑動地拘束於中段主傘骨42的中間部之部分係藉由該線 彈簧5 2的環狀部5 2 1所形成的。此環狀部5 2 1係藉由折 彎形成於線彈簧52的中間部，而迂迴進入到線彈簧52， 使得形成對於該線彈簧52能夠滑動之拘束部。藉此能夠 減少零件數量。 圖9係個別地顯示主傘骨40的構成零件之後段主傘 骨41、中段主傘骨42、前段主傘骨44。如同圖所示，後 • 段主傘骨4 1係作爲全體使用線狀細棒（鋼線）單一零件 來構成的。在兩端部及中間部，分別藉由沖壓加工形成有 扁平部411、412、413，在此扁平部411、412、413，加 工形成有軸孔6 7或通過孔6 8等作爲後段主傘骨4 1之必 要部分。如此所形成之後段主傘骨4 1，係由於不需要合釘 配件等的其他零件，故適合於低成本化。又，藉由作成單 一構造且剖面大致呈圓形，能夠具備作爲傘骨之優良強度 特性。 中段主傘骨4 2係與後段主傘骨4 1同樣地，其主要部 •15- (13) 1264294 分使用線狀細棒（鋼線）來構成的。在此情況，在與中段 主傘骨42進行鉸鏈連結部分，冠蓋套合有合釘配件62。 又，與前段主傘骨44進行鉸鏈連結部分係藉由沖壓加工 形成有扁平部422，在此扁平部422形成有用來進行鉸鏈 連結之軸孔67。前段主傘骨44係以細棒狀FRP所構成， 在其底端冠蓋套合有合釘配件65，在其前端安裝著露出端 頭 44 1。 • 在上述第2實施形態，以溝槽傘骨構成支撐傘骨45， 但此支撐傘骨45亦可使用線狀細棒（鋼線）來構成。在 支撐傘骨45也以線狀細棒來構成之情況時，能夠進一步 提昇折疊狀態之緊緻性與低成本化能力。 [產業上之利用可能性] 能夠提供具有優良之低成本化能力，且受到例如強風 等，即使在後段主傘骨產生一些彎曲，也不容易折斷，具 ® 備維持傘功能的強韌性，且亦可將傘折疊成較以往更小之 折疊式傘。 【圖式簡單說明】 圖1係顯示本發明的第1實施形態之折疊式傘的骨架 結構，爲將該骨架結構屈曲成一半之半關傘（或半開狀態 )狀態的省略側面圖。 圖2係顯示本發明的第1實施形態之折疊式傘的骨架 結構，爲顯示將該骨架結構元全伸展之開傘狀悲的省略側 -16- (14) 1264294 面圖。 圖3係個別地顯示骨架結構的主要部分之主傘骨的構 _零件與支撐傘骨的圖。 圖4係顯示後段主傘骨的詳細之側面圖與各部之斷面 圖。 圖5係顯示第1分割中段主傘骨的詳細之側面圖與各 部之斷面圖。 圖6(a) ( b )係分別顯示上傘軸與下傘軸的局部剖 面之圖。 圖7係顯示本發明的第1實施形態之不同形態的省略 側面圖。 圖8係顯示本發明的第2實施形態之折疊式傘的骨架 結構之省略側面圖。 圖9係個別地顯示骨架結構的主要部分之主傘骨的構 成零件之圖。 圖1 0係顯示以往的折疊式傘之骨架結構的省略側面 圖。 圖1 1係顯示在以往的折疊式傘所使用之後段主傘骨 的結構之斜視圖。 【主要元件符號說明】 …伸縮式中棒 1 1…拐尖 12…傘握柄 -17- 1264294 (15) 1 3…撥動鈕 1 5…傘布 2 1…上傘軸 2 2…下傘軸 3 1、3 2…透孔 34…環狀樞支線 4 0···主傘骨 φ 41…後段主傘骨 41 1〜41 3…扁平部 42…第1分割中段主傘骨、中段主傘骨（非分割之情況） 422…扁平部 4 3…第2分割中段主傘骨 44…前段主傘骨 45…支撐傘骨 45 1、45 2…扁平部 _ 51、53…線狀連桿 52···線彈簧（彈性直線）1264294 (1) Description of the Invention [Technical Field] The present invention relates to a folding umbrella, and relates to a multi-stage folding umbrella that is effectively applied to a main rib using, for example, a 4-fold type or a 3-fold type. [Prior Art] For example, a multi-stage folding umbrella system is constructed as shown in FIG. 1A, using a 4-fold main umbilical bone 40', and a main rib 40' is a rear main rib 41', first and second The two divided middle main ribs 42' and 43' and the front main rib 44 are hingedly connected to each other. In the same figure, the front end of the support rib 45 is hingedly coupled to the intermediate portion of the rear main rib 4 1 '. The bottom end portion of the rear main rib 4 1 ' is hingedly coupled to the lower umbrella shaft 22, and the bottom end portion of the support rib 45 is hingedly coupled to the upper umbrella shaft 21. Thereby, a scale-type coupling mechanism that interlocks the up and down movement of the lower umbrella shaft 22 to flex/stretch (bend) the main rib 4 0 ' is formed. With the main umbilical 40, flexion and extension, the umbrella is switched. The upper umbrella shaft 21 is fixed to the upper portion of the telescopic center rod 10, and the lower umbrella shaft 22 is slidably guided to the middle rod 1 below the umbrella shaft 21. The middle rod 1 is a 5-segment telescopic type with a nested tubular shape, and a tip 11 is attached to the upper end, and an umbrella grip 12 is attached to the lower end. Further, a toggle button 13 for locking the lower canopy shaft 22 to the open position is provided. Between the supporting rib 45 and the first divided middle main rib 42', a linear connecting mechanism is formed by bridging the linear connecting rod 51. Further, between the first divided middle main rib 42' and the front main rib 44, a linear connecting rod 53 is also provided by the bridge -4- (2) 1264294 to form a parallel connecting mechanism. Further, a wire spring (linear straight line) 52 is installed between the rear main rib 4 1 and the second divided middle main rib 4 3 , and the intermediate portion of the wire spring 52 is slidably restrained The middle portion of the main rib 4 2 ' in the middle of the first division. By the links 5 1 and 5 3 and the wire spring 5 2, the flexing and stretching operation of the main rib 4 0 ' follows the lower umbrella shaft 22 up and down, and the elastic operation is given to the bending operation. In this case, the hinge Φ connecting portion between the rear main rib 4 1 and the supporting rib 4 5 and the portion slidably restraining the wire spring 52 to the first divided middle main rib 42' are enlarged as shown in the figure. As shown, hinge pins 66 are mounted. The other hinge joints are similarly fitted with hinge pins. In particular, the rear main rib 4 1 ' has a hinge joint portion at the both end portions and the intermediate portion, and the hinge pin 66 is attached to each of the portions. In addition, in the rear main rib 4 1 ', a through hole for hooking the end of the linear link 51 is provided. Therefore, the rear main rib 4 1 ' and the first divided middle main rib 42 ' are formed as shown in Fig. 11 using a U-shaped cross-section grooved rib. This grooved rib is formed by bending a thin metal plate of aluminum or the like into a U shape. Since it has rigidity and is extremely effective for providing the shaft hole 67 for mounting the above-described hinge pin 66, most of the aggregates used as umbrellas are particularly used. It is the aggregate of the main rib or the middle rib (refer to, for example, Japanese Laid-Open Patent Publication No. 2000-189-9166). [Patent Document 1] Japanese Patent Laid-Open No. 2003-189916. - (3) 1264294 [Problems to be Solved by the Invention] However, the above-mentioned folding umbrella has the following problems. In other words, although the rear main rib 4 1 '' formed by the grooved rib has rigidity, when it is bent by strong wind or the like, it is likely to be broken by the bent portion. That is, there is a problem that it is rigid but brittle and easily broken. Located at the bottom end of the main rib 40', the main rib 41' is attached to the main rib 4', and is most required to have a strength portion. However, thereafter, the tip end main rib 4 1 ' is connected to the middle portion of the support rib 45, and a large bending load is applied to the joint portion to form a problem that it is easily broken. Further, the rear main rib 4 1 ' formed of the grooved rib has a certain thickness in the folding direction of the umbrella, but this thickness also hinders the problem of folding the umbrella into a small (thin or thin). Moreover, there are also problems with the production of grooved ribs and the cost of the bureau. The present invention has been made in view of the above problems, and an object thereof is to provide an excellent low cost capability, and is subjected to, for example, strong wind, etc., even if some bending is generated in the rear main rib, it is not easy to be broken, and the maintenance umbrella is provided. The toughness of the function, and the umbrella can be folded into a smaller folding umbrella than before. The objects and structures other than the above are understood from the description and drawings. [Means for Solving the Problem] The means of the present invention is characterized by the following (1). -6 - (4) 1264294 (1) A folding umbrella having an umbrella shaft fixed to an upper portion of a telescopic center rod; the lower portion of the umbrella shaft is slidably guided to the umbrella shaft below the middle rod; a main rib formed by hinge-joining the rear main rib, the middle main rib and the front main rib; and the front end hinge is coupled to the support rib at the middle of the rear main rib, and the rear main umbrella is The bottom end portion of the bone and the bottom end portion of the support rib are configured as a folding umbrella hingedly coupled to the upper umbrella shaft and the lower umbrella shaft, wherein the rear main rib system is large and has a circular section line. The thin rod is formed with a flat portion formed at both ends thereof, and the flat portion forms a shaft 孑 L for articulating the middle main rib and the umbrella shaft. In the above means, the following means is particularly effective as an embodiment. (2) The above means (1), wherein a steel wire rod is used as the linear thin rod. (3) The above-mentioned means (1) or (2), wherein the middle main rib is constituted by the first and second divided main ribs which are hingedly connected. (4) The above method (3), wherein a wire spring is mounted on the bridge between the rear main rib and the second divided middle main rib, and the middle portion of the line spring and the first divided middle portion are provided The intermediate portion of the main rib is slidably fitted with the annular ring member inserted so that the wire spring is slidably restrained in the middle portion of the main rib of the first divided middle portion. (5) The method of any one of the above-mentioned means (1) to (4), wherein the middle main rib is formed by a linear thin rod having a substantially circular cross section and is at the end side of the main rib joint side with the rear section The crown cover is provided with a binding nail (d 〇we 1 ) and (5) 1264294 pieces, and a flat portion is formed at the end portion on the side of the front main rib joint, and the flat portion is provided for hinge connection with the front main rib. Shaft hole. (6) The method of any one of the above-mentioned means (1) to (5), wherein the intermediate portion of the main rib is attached to the cap after the hinge connection of the front end portion of the support rib is fitted. (7) The method of any one of the above-mentioned means (1) to (6), wherein the intermediate portion of the main rib is connected to the front end portion of the support rib, and the flat portion is formed by the addition, and the flat portion is provided A shaft hole for hinge connection with the support rib. (8) The method of any one of the above-mentioned means (1) to (7), wherein the support rib is formed by a linear thin rod having a substantially circular cross section, and a flat portion for hinge connection is formed at both ends thereof. (9) Any of the above means (1), (2), (5) to (8), wherein: the main rib of the rear main rib, the middle main rib, and the front main rib A 3-fold main rib that is hinged. (10) The method of any one of the above-mentioned means (1) to (3), (5) to (9), wherein a spring action is applied to the flexion and extension operation of the main rib, and the bridge is installed a line spring between the main rib of the rear section and the main rib of the front section is slidably restrained in the middle portion of the main rib of the middle section, and the locking portion is bent at the middle portion of the wire spring to form a loop that enters the middle rib of the middle section. Shape (1 ο 〇P). [Effect of the Invention] It is possible to provide an excellent cost reduction capability, and is subject to, for example, strong wind (6) 1264294, etc., even if some bending is generated in the rear main rib, it is not easy to be broken, and has the toughness of maintaining the umbrella function, and can also be Fold the umbrella into a smaller folding umbrella than ever before. The actions and effects other than those described above can be understood from the description and drawings of the present specification. [Embodiment] FIG. 1 and FIG. 2 show a skeleton structure of a folding umbrella according to a first embodiment of the present invention. Fig. 1 shows a half-closed umbrella (or half-open state) state in which the skeleton structure is bent, and Fig. 2 shows an open state in which the skeleton structure is completely extended, and reference numeral 15 shows an umbrella cloth. The folding umbrella shown in the same figure is composed of a 4-fold main rib 40 which divides the rear main rib 41, the first and the second two, and divides the middle main rib 42 and 43. And the front main rib 44 is hinged and connected by a hinge. • The front end portion of the support rib 45 is hinged to the middle portion of the rear main rib 4 1 . The bottom end portion of the rear main rib 4 1 is hingedly coupled to the lower umbrella shaft 22, and the bottom end portion of the support rib 45 is hingedly coupled to the upper umbrella shaft 21. Thereby, a scaled coupling mechanism that interlocks the up and down movement of the lower umbrella shaft 22 to flex/stretch (bend) the main rib 40 is formed. With the flexion and extension of the main rib 40, the umbrella is switched. The upper umbrella shaft 21 is fixed to the upper portion of the telescopic center rod 10, and the lower umbrella shaft 22 is slidably guided to the middle rod 10 below the umbrella shaft 21. The middle rod 10 is a 5-slide sliding 9- (7) 1264294 telescopic type in which 5 tubes are coaxially coupled in a nested manner, and is pressed and locked in the most extended and shortened state 2 (not shown). ). Here, the tip 10 of the rod 10 is attached with a tip 1 and an umbrella handle 2 is attached to the lower end. Further, a toggle button 13 for locking the lower canopy shaft 22 to the open position is provided. Between the supporting rib 45 and the first divided middle main rib 42 a linear connecting mechanism is formed by bridging the linear connecting rod 51. Further, between the first divided middle main rib 42 and the front main rib 44, a linear connecting rod 5 is also attached by the bridge # to form a parallel connecting mechanism. Further, a wire spring (linear straight line) 52 is installed between the rear main rib 4 1 and the second divided middle main rib 43 , and the intermediate portion of the wire spring 52 is slidably restrained to the first one. The middle portion of the middle segment main rib 42 is divided. By the links 5 1 and 53 and the wire spring 52, the flexing and contracting motion of the main rib 40 follows the lower and lower umbrella shaft 22 up and down, and the elastic operation is given to the flexing and stretching operation. Further, as shown in part in Fig. 1, in the middle portion of the rear main rib 41, the crown cap is fitted with a staple fitting 6-1, and the staple fitting 61 is mounted with a hinge pin 66. By the hinge pin 66, the front end of the support rib 45 is hinged. The both ends of the first divided middle main rib 42 and the second divided middle main rib 43 are also respectively formed with hinge joints according to the staple fittings 62, 63, and 65. The wire spring 52 is attached at its bottom end to the front end side of the rear main rib 4 1 and its front end hinge is coupled to a separate staple fitting (connection fitting) 64. The staple fitting 64 has one end hingedly coupled to the front end of the wire spring 52, and the other end hingedly coupled to the front end of the staple fitting 63 of the first divided middle main rib 4 2 . -10- (8) 1264294 The intermediate portion of the wire spring 52 is partially enlarged and inserted into the annular connecting member 7 together with the intermediate portion of the first divided middle main rib 42 as shown in a partially enlarged view in FIG. 1. Slidably restrained in the first divided middle segment main rib 42 The rifling spring 52 is substantially linear in the slidable range. On both sides of the straight line range, a bent portion that locks the movement of the annular connecting member 71 is formed. The restraining structure of the wire spring 52 of the above-described annular connecting member 71 is a very effective means for simplification of the shape of the first divided middle main rib 42. Fig. 3 shows the components (41 to 44) and the supporting ribs 45 of the main rib 40 which are the main portions of the above-described skeleton structure. The main rib 40 is composed of a rear main rib 41, two first and second divided middle main ribs 42, 43 and four main ribs 44 of the front main rib 44. The support rib 45 is formed by bending a metal thin plate such as aluminum or aluminum alloy into a U-shaped grooved rib, and a shaft hole 67 for performing a hinge joint is formed at the end portion. The front main rib 44 is formed of a thin rod-shaped FRP (fiber reinforced resin), and a nail fitting 65 is fitted over the bottom end cap, and an exposed end 441 is attached to the front end. The rear main rib 4 1 and the first and second divided mid-section main ribs 42 and 43 are each formed of a linear thin rod of a circular cross section, specifically a steel wire. This steel wire can be mass-produced by using a wire or the like at a low cost. Therefore, the use of a linear thin rod having a substantially circular cross section contributes greatly to the cost reduction of the main rib, and the cost of the folding umbrella can be greatly improved. -11 - (9) 1264294 The rear main rib 4 1 is a side view of the same as in Fig. 4 and a cross-sectional view of each part showing 'using a predetermined length of steel wire, at both ends, by stamping, etc. Flat portions 4 1 1 and 4 1 2 are formed. The formation of the flat portions 4 1 1 and 4 1 2 can be efficiently performed by punching or a simple mold or the like. Therefore, the use of a linear thin rod having a substantially circular cross section contributes not only to the fineness. The low cost of the bar material also contributes greatly to the cost reduction in terms of processing cost. A shaft hole 67 for hingedly connecting to the lower umbrella shaft 22 is provided in one of the flat portions 411. The other flat portion 412 is provided with a shaft hole 67 for hinged connection with the first divided middle main rib 42 and a through hole 6 for locking and connecting one end of the wire spring 52. Further, in the intermediate portion, the flat portion 4 1 3 is also formed by processing such as pressing. The flat portion 4 1 3 is provided with a shaft hole 67 for hinge connection with the support rib 45. The intermediate portion of the main rib 4 1 after the flat portion 4 1 3 is included to reinforce the intermediate cap crown cover fitting 6 1 . The first divided middle main rib 42 is formed using a steel wire of a predetermined length in the same manner as the rear main rib 41 as shown in the side view and the cross-sectional views of the respective portions. In this case, the staple fittings 62, 63 are respectively fitted over the crown caps at their respective ends. A staple fitting 62 on the bottom end side (the right side of the figure) is provided with a shaft hole 67 for hinge-joining the rear main rib 4 1 and the link 51. The staple fitting 63 on the distal end side (the left side of the figure) is provided with a shaft hole 67 for hinge-joining the second divided middle main rib 43 and the staple fitting 64 to the link 53. Further, although not shown in the drawings, a through hole for fixing the umbrella cloth is formed in the staple fittings 62 and 63. -12- (10) 1264294 In the middle portion of the first divided middle main rib 4 2 , as shown enlarged in part in FIG. 1 , the intermediate portion of the wire spring 52 can be slidable by the annular connecting member 7 1 . The ground is restrained. By this annular connecting member 7-1, the wire spring 52 is locked without using the staple fitting. Fig. 6 shows a partial cross section of the upper canopy shaft 21 and the lower canopy shaft 22, respectively. As shown in Fig. (a), the two umbrella shafts 2 1 and 22 are respectively annular hub members having through holes 3 1 and 3 2 at the center, and the upper umbrella shaft 2 1 is fixed to the front end of the middle rod 1 ' The shaft 22 is slidably guided to the middle rod 10 to move up and down. In the upper canopy shaft 21, the outer end portion of the annular hub member having the through hole 31 at the center's bottom end of the plurality of (6) support ribs 45 is pivotally supported by the annular pivot line 34. Similarly, as shown in Fig. (b), the bottom end of the main rib 41 of the rear section of the lower umbrella shaft 22' is generally pivotally supported by the annular pivot line 34. The main rib 40 and the support rib 45 are distributed to the left and right, respectively, and arranged in a radial shape. With such an arrangement, the umbrella can be folded into a flat shape (plate shape). Further, although not shown, when all the main ribs 40 and the support ribs 45 are arranged at equal angular intervals throughout the circumference, the umbrella is folded into a circular shape (cylindrical shape), and the folding type is the folding type according to the first embodiment. The umbrella is constructed using a steel wire having a substantially circular cross section. This is because the flat portions 411 and 412 are formed at both ends thereof, and the flat portions 411 and 412 are provided with shaft holes 67 for hinge-joining the first divided middle main rib 42 and the lower umbrella shaft 22. With the above structure, the structure of the rear main rib 4 1 is integrated and strengthened. In the latter part, the main rib 4 1 is lower in rigidity than the previous use of the grooved ribs -13-(11) 1264294, but due to its flexibility and high elastic restoring force, it is subjected to excessive load in case of strong wind. At the time of the temporary deformation, the load can be avoided and the self-recovery of the original state can be restored after the load is released. Therefore, there is a possibility that even if a strong wind or the like is encountered, the main umbrella is slightly bent in the latter stage, and it is not easily broken, and the function of the umbrella can be maintained. Further, since the thickness of the rib of the folding direction of the umbrella is reduced by forming the rear main rib 4 1 by a wire such as a steel wire, the umbrella can be made smaller (thin or thinner) than before. For example, as shown in Fig. 6, in the state in which the rear main rib 41 and the struts 45 are arranged in a radial direction, the hinges can be folded into a very thin shape when the umbrella shafts 21 and 22 are hinged. In the above embodiment, the divided middle main ribs 42, 43 are also formed using a steel wire or the like, which is very effective for further improving the tightness of the toughness of the main rib 40. And, as shown in Fig. 7, the support rib 45 can also be constituted by a linear thin rod (steel wire) having a substantially cross section. In this case, the flat portions 451 and 452 for joint connection are formed by both ends, and the support rib 45 having a body structure of the staple fitting is not formed. Since the ribs 45 are also formed by linear thin rods, the rigidity of the main umbrella 1 and the compactness of the folded shape can be further improved. In addition, by using steel wire and other materials, the cost reduction capability can be further improved. Fig. 8 is a view showing the structure of a folding umbrella according to a second embodiment of the present invention. The folding umbrella shown in the same figure uses the rear main rib 4 1 , etc., the weight, the sex is strong, the 41 is strong, the folding wire can be folded, the wire is folded, and the wire frame is folded to support the I 40. Middle section -14(12) 1264294 The main rib 42 and the three main ribs of the front main rib 44 are constructed by a hinged joint of a 3-fold main rib. In the second embodiment, the bottom end of the main rib 40 is hingedly coupled to the upper umbrella shaft 21, and the bottom end of the support rib 45 is hingedly coupled to the lower umbrella shaft 22. Thereby, when the umbrella is deployed, the main rib 40 can be completely along the inner side of the umbrella cloth (not shown). Further, in the second embodiment, the intermediate portion of the bobbin 52 for bridging is slidably restrained to the intermediate portion of the middle main rib 42 in order to impart an elastic action to the flexing motion of the main rib 40. It is formed by the annular portion 5 2 1 of the wire spring 52. The annular portion 5 2 1 is formed in the intermediate portion of the wire spring 52 by bending, and is twisted back into the wire spring 52 so as to form a restraining portion that can slide the wire spring 52. This can reduce the number of parts. Fig. 9 shows the main section ovary 41, the middle section main rib 42, and the front section main rib 44 in the subsequent section of the main rib 40. As shown in the figure, the rear section main rib 4 1 is constructed as a single part using a linear thin rod (steel wire). Flat portions 411, 412, and 413 are formed by press working at the both end portions and the intermediate portion, and the flat portions 411, 412, and 413 are formed with the shaft holes 67 or the through holes 6 8 as the rear main umbrella. The necessary part of bone 4 1. The main rib 4 1 which is formed in the subsequent stage is suitable for cost reduction because it does not require other parts such as a nail fitting. Further, by forming a single structure and having a substantially circular cross section, it is possible to provide excellent strength characteristics as an rib. The middle main rib 4 2 is the same as the rear main rib 4 1 , and its main part • 15- (13) 1264294 is composed of a linear thin rod (steel wire). In this case, in the hinge joint portion with the middle main rib 42, the crown cover is fitted with the staple fitting 62. Further, the hinge portion is formed in the hinge connecting portion with the front main rib 44, and the flat portion 422 is formed by press working, and the flat portion 422 is formed with a shaft hole 67 for hinge connection. The front main rib 44 is formed of a thin rod-shaped FRP, and a cap fitting 65 is fitted over the bottom end cap, and an exposed end 44 1 is attached to the front end. In the second embodiment described above, the support rib 45 is constituted by a grooved rib, but the support rib 45 may be formed by using a linear thin rod (steel wire). In the case where the supporting rib 45 is also constituted by a linear thin rod, the compactness and cost reduction capability of the folded state can be further improved. [Industrial use possibility] It is capable of providing excellent cost reduction capability, and is subject to, for example, strong winds, and it is not easy to break even if the main rib is bent in the back section, and has the toughness of maintaining the umbrella function, and The umbrella can also be folded into a smaller umbrella than before. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side elevational view showing a skeleton structure of a folding umbrella according to a first embodiment of the present invention, in a state in which the skeleton structure is bent into a half-closed umbrella (or a half-open state). Fig. 2 is a cross-sectional view showing the skeleton structure of the folding umbrella according to the first embodiment of the present invention, and showing the omnidirectional extension of the skeleton structure element, -16-(14) 1264294. Fig. 3 is a view showing the structure of the main rib of the main portion of the skeleton structure and the supporting ribs. Fig. 4 is a detailed side view showing a rear main rib and a sectional view of each part. Fig. 5 is a detailed side view and a sectional view showing each of the main ribs of the first divided middle section. Fig. 6(a) and (b) are views showing a partial cross section of the upper and lower umbrella shafts, respectively. Fig. 7 is a side elevational view showing a different embodiment of the first embodiment of the present invention. Fig. 8 is a side elevational view showing the skeleton structure of the folding umbrella according to the second embodiment of the present invention. Fig. 9 is a view showing the constituent parts of the main rib of the main portion of the skeleton structure individually. Fig. 10 is a perspective view showing the skeleton structure of a conventional folding umbrella. Fig. 1 is a perspective view showing the structure of the main rib after the use of the conventional folding umbrella. [Main component symbol description] ... telescopic middle rod 1 1... tip 12... umbrella grip -17- 1264294 (15) 1 3... toggle button 1 5... umbrella cloth 2 1... umbrella shaft 2 2... umbrella Axis 3 1 , 3 2 ... through hole 34 ... annular pivot branch 4 0 ··· main rib φ 41... rear main rib 41 1~41 3...flat portion 42...first split middle main rib, middle main Umbrella (in case of non-segmentation) 422...flat section 4 3...second section mid section main rib 44...front section main rib 45...support rib 45 1 ,45 2...flat section _ 51,53...wire link 52···Line spring (elastic straight line)
521…環狀部 61〜65…合釘配件 6 6…鉸鏈銷 6 7…軸孑L 6 8…通過孑L -18-521...rings 61~65...pin fittings 6 6...hinge pins 6 7...axis 孑L 6 8...by 孑L -18-