201114513 六、發明說明： 【發明所屬之技術領域】 本發明係關於使用在熱軋鋼板製造線之鋼板之冷卻裝 置、熱軋鋼板之製造裝置以及鋼板之製造方法。具體而言 ，係關於冷卻水排水性優良之鋼板之冷卻裝置、熱軋鋼板 之製造裝置以及使用該裝置之鋼板之製造方法。 【先前技術】 汽車用及構造材等所使用之鋼材，要求具有優良強度 '加工性、韌性之機械特性。爲了綜合地提高該等機械特 性，鋼材組織之微細化係有效的方法。所以，大家都在硏 發可得到具有微細組織之鋼材的方法。此外，若能使組織 微細化，即使減少合金元素之添加量，亦可製造具備優良 機械性質之高強度熱軋鋼板。 組織微細化之方法，於熱軋輥軋，尤其是後段，進行 高壓下輥軋，使沃斯田鐵粒產生較大之變形，提昇轉變密 度，來追求冷卻後之肥粒體粒之微細化的方法，係大家所 熟知。其次’從抑制沃斯田鐵之再結晶及復原、及促進肥 粒體變態之觀點而言，於輥軋後之短時間內使鋼板冷卻至 6 00°C〜7〇〇°C ’係有效的方法。亦即，於熱軋輥軋之後， 設置可比傳統更快冷卻之冷卻裝置來進行輥軋後之鋼板急 冷係有效果的。其次，實施此種輥軋後之鋼板急冷時，爲 了提高冷卻能力，可增加對鋼板噴射之單位面積的冷卻水 量，亦即，可增大流量密度。 201114513 然而，如上所示，增大冷卻水量、流量密度時，因爲 供水及排水之關係，於鋼板上面，滯留於該鋼板上面之水 (滯留水）會增加。另一方面，於鋼板下面側’下面導引 部及鋼板間之滯留水會增加。此種滯留水係使用於鋼板冷 卻後之水，爲了將冷卻噴嘴所供應之水提供給鋼板來確保 冷卻能力，應儘早將其排出。此外’因爲滯留水係水之層 ，若其較厚會產生抵抗，來自冷卻噴嘴之水將無法有效地 到達鋼板。其次，滯留水從鋼板中央部流向端部’其流速 愈靠近鋼板端部會愈增加，滯留水量增加的話，鋼板板寬 度方向的冷卻差變大。此外，滯留水之量若過度增加，於 上面導引部上亦會出現滯留水，而淹沒了冷卻噴嘴前端。 如上面所述，因爲於熱軋輥軋後儘早進行急速冷卻係 有效果的，故應於熱軋輥軋機之最終軋台之工作輥後立即 進行冷卻。亦即，對存在於熱軋輥軋機列之最終軋台殻體 之內側的鋼板噴射冷卻水來進行冷卻。此種冷卻如專利文 獻1之記載所示。 [專利文獻1]日本特許第402987 1號公報 【發明內容】 噴射至鋼板上面側之冷卻水當中，其中大部分係於鋼 板寬度方向移動，並流至下方而被排出。然而，如熱軋輥 軋機列之最終軋台之殻體內側，有時於鋼板板寬度方向兩 側配置有該殼體之立設部等之側壁。此時，對鋼板上面噴 射冷卻水時，側壁可能妨礙冷卻水之排水、及排水衝擊側 -6- 201114513 壁並使朝上方移動之部分冷卻水滯留於上面導引部而使冷 卻噴嘴之前端被水淹没。專利文獻1係記載著提高上面導 引部之排水性能之發明，然而，爲了提高冷卻性能而使用 大量冷卻水時，提高從鋼板板寬度方向兩側部之排水性也 是重要的事項。 因此，有鑑於上述問題點，本發明之課題係提供一種 於熱軋鋼板製造線具有優良排水性之冷卻裝置、熱軋鋼板 之製造裝置以及鋼板之製造方法。 以下，針對本發明進行說明。 爲了解決前述課題，申請專利範圍第1項所記載之發 明係提供一種冷卻裝置，配置於熱軋輥軋機列之最終軋台 之下步驟側，具備：可對於搬運滾輪上被搬運之鋼板進行 冷卻之複數冷卻噴嘴之鋼板之冷卻裝置，其特徵爲’冷卻 噴嘴配設於鋼板通過部位之上面側及下面側位置而可朝鋼 板通過部位噴射冷卻水，具有：配設於冷卻噴嘴之均一冷 卻寬度更爲外側之鋼板板寬度方向的位置，進行冷卻噴嘴 所噴射之冷卻水之排水整流的整流手段。 此處，冷卻噴嘴之「均一冷卻寬度」，係指於配置之 冷卻噴嘴群之性質上，可對被搬運鋼板進行均一冷卻之鋼 板寬度方向的大小。具體而言，通常係與鋼板製造裝置可 製造之最大鋼板的寬度一致。 此外，「冷卻水」係指做爲冷卻媒體使用之冷卻水， 不必爲所謂之純水’亦可以爲工業用水等含有無法避免而 混入之雜質的水。 201114513 申請專利範圍第2項所記載之發明 第1項所記載之冷卻裝置，其特徵爲， 上面側配設有上面導引部，整流手段係 之均一冷卻寬度更爲外側之鋼板板寬度 及另一方而相對之一對構件，該相對構 之間隔爲最窄，下端之間隔寬於上端， 近上面導引部來配設，下端係位於比上 之位置。 此處，「接近」係指不必一定要接 可能接近。 申請專利範圍第3項所記載之發明 第1項或2項所記載之冷卻裝置，其特徵 止冷卻噴嘴所噴射之冷卻水從上面導引 外側到達該上面導引部上面之手段。 申請專利範圍第4項所記載之發明 第1項〜第3項所記載之冷卻裝置，其特 備朝下方噴射氣體之氣體噴射裝置。 申請專利範圍第5項所記載之發明 第1項所記載之冷卻裝置，其特徵爲， 使排水分歧成上方及下方來進行導引之 可供被分歧導引至上方之水流入之開口 爲了解決前述課題，申請專利範園 明係提供具備：熱軋輥軋機列、及申誶 第5項之其中任一項所記載之冷卻裝置 ，係申請專利範圍 於鋼板通過部位之 配設於比冷卻噴嘴 方向的位置之一方 件之配置上，上端 上端係以接觸或接 面導引部更爲下方 觸之配設，但應儘 ，係申請專利範圍 爲，整流手段係防 部寬度方向兩端之 ，係申請專利範圍 徵爲，整流手段具 ，係申請專利範圍 整流手段係具有： 分歧手段、及具備 β排水手段。 丨第6項所記載之發 丨專利範圍第1項〜 之熱軋鋼板之製造 -8- 201114513 裝置，其特徵爲，於冷卻裝置鋼板板寬度方向更爲外側之 位置，立設著側壁。 申請專利範圍第7項所記載之發明，係申請專利範圍 第6項所記載之熱軋鋼板之製造裝置，其特徵爲，熱軋輥 軋機列之最終軋台具備：用以保持工作輥之殼體，殼體具 有：其間含有上面導引部之一部分之一對立設部，且該立 設部係前述側壁。 申請專利範圍第8項所記載之發明，係具備：熱軋輥 軋機列、及申請專利範圍第1項〜第5項之其中任一項所記 載之冷卻裝置之熱軋鋼板之製造裝置，其特徵爲，於冷卻 裝置之鋼板板寬度方向更爲外側之位置立設著側壁，冷卻 裝置之整流手段之至少一部分係以接觸側壁之方式配設。 申請專利範圍第9項所記載之發明，係具備：熱軋輥 軋機列、及申請專利範圍第1項〜第5項之其中任一項所記 載之冷卻裝置之熱軋鋼板之製造裝置，其特徵爲，於冷卻 裝置之比鋼板板寬度方向更爲外側之位置，立設著側壁， 冷卻裝置之整流手段係以與側壁具有間隙之方式配設。 爲了解決前述課題，申請專利範圍第1 0項所記載之發 明係提供使鋼板通過申請專利範圍第6項〜第9項之其中任 一項所記載之熱軋鋼板之製造裝置來製造鋼板之鋼板之製 造方法。 爲了解決前述課題，申請專利範圍第1 1項所記載之發 明係提供使鋼板通過申請專利範圍第6項〜第9項之其中任 一項所記載之熱軋鋼板之製造裝置來製造鋼板之方法，含 -9- 201114513 有：以熱軋輥軋機列當中之最終軋台之下壓率爲最大來進 行修整輥軋之步驟、及利用冷卻裝置進行冷卻之步驟。 爲了解決前述課題，申請專利範圍第12項所記載之發 明係提供使鋼板通過申請專利範圍第6項〜第9項之其中任 —項所記載之熱軋鋼板之製造裝置來製造鋼板之方法，製 造裝置於冷卻裝置之下步驟側具備夾壓滾輪，通過之鋼板 之前端部到達夾壓滾輪後，開始以冷卻裝置進行冷卻。 依據本發明，可以提供熱軋鋼板製造線之排水性優良 之冷卻裝置、熱軋鋼板之製造裝置以及鋼板之製造方法。 此外，藉此，可以增加冷卻水量，故可進一步促進輥軋後 之急冷，而可製造機械性能優良之鋼板。 【實施方式】 本發明之上述作用及增益，由以下說明之以實施發明 爲目的之形態可以得知。以下，參照圖式所示之實施形態 來進行本發明之說明。但是，本發明並未受限於該等實施 形態。 第1圖係具備第一實施形態之冷卻裝置20之熱軋鋼板 之製造裝置10的部分槪略圖。第1圖中，鋼板1係被從圖面 左側（上游側、上步驟側）朝右側（下游側、下步驟側） 方向搬運，圖面上下係垂直方向。有時將該上游側（上步 驟側）·下游側（下步驟側）方向記載成通板方向，而將 與其垂直相交方向通過之鋼板的板寬度方向記載成鋼板板 寬度方向。此外，爲了圖面簡潔，省略了重複符號之記載 -10- 201114513 如第1圖所示，熱軋鋼板之製造裝置10，具備有：熱 軋輥軋機列1 1、冷卻裝置20、搬運滾輪12 ' 12、...、以及 夾壓滾輪13。此外’省略了圖示及說明，然而，於熱軋輥 軋機列1 1之上步驟側，配置著加熱爐及粗輥軋機列等，用 以修整進入熱軋輥軋機列1 1之鋼板的條件。另一方面，於 夾壓滾輪1 3之下步驟側，配置著其他冷卻裝置及捲取機等 ，以線圈狀進行鋼板之出貨爲目的之各種設備。 熱軋鋼板大致以如下方式進行製造。亦即，將從加熱 爐抽出並以粗輥軋機輥軋成特定厚度之粗棒，一邊控制溫 度一邊以熱軋輥軋機列1 1連續輥軋成特定厚度。其後，於 冷卻裝置2〇內進行急速冷卻。此處，冷卻裝置20，於熱軋 輥軋機列1 1之最終軋台1 1 g，係以極接近該最終軋台11 g之 輥軋滾輪llgw、11 gw (參照第2圖）之方式設置於支持輥 軋滾輪之殼體1 1 gh內側。其次，通過夾壓滾輪1 3以其他冷 卻裝置冷卻至特定捲取溫度，並以捲取機捲取成線圈狀。 以下，包含冷卻裝置20在內，針對熱軋鋼板之製造裝 置1 0 (以下，亦簡稱爲「製造裝置1 0」）進行詳細說明。 第2圖係具備第1圖之冷卻裝置20之部位的放大圖。第2 ( a )圖係冷卻裝置2〇整體之放大圖，第2 ( b )圖係最終軋台 1 lg附近之放大圖。第3圖係第2 ( a )圖之III-III之透視剖 面圖。所以，第3圖中，圖面上下係製造裝置10之垂直方 向，圖面左右係鋼板板寬度方向，圖面遠/近方向係通板 方向。 -11 - 201114513 本實施形態之熱軋輥軋機列1 1，由第1圖可以得知，7 台輕車L機（11a、lib、11c、…、llg)沿著通板方向並列 。各輥軋機1 1 a、1 1 b、…、1 1 g係用以構成所謂各軋台之 輥軋機’以符合最終製品必要之厚度、機械性質、表面品 質等條件來設定下壓率等輥軋條件。此處，各軋台之下壓 率係以符合所製造鋼板應具有之性能的方式來設定，然而 ’以高壓下輥軋使沃斯田鐵粒產生較大變形而提昇轉變密 度來求追冷卻後之肥粒鐵粒之微細化觀點而言，最終軋台 1 Ig之下壓率應較大。 各軋台之輥軋機，具有：實際夾持鋼板1並下壓之一 對工作輥（llaw、llaw、…、llfw、llfw、llgw、llgw )、及以接觸該工作輥外緣配置之一對輪助滾輪（1 1 ab、 1 1 ab、…、1 1 fb、1 1 fb、1 1 gb、1 1 gb )。此外，輥軋機， 具備內側含有工作輥及輪助滾輪而形成輥軋機外殻並用以 支持輥軋滾輪之殼體（11 ah、…、11 fh、11 gh) »該殻體 具有相對立設之立設部（最終軋台1 1 g時，係第3圖之立設 部11 gr、11 gr)。亦即，殼體之立設部，由第3圖可以得知 ，係以鋼板板寬度方向夾持鋼板及下面導引部40之方式來 立設。 此處，第2(a)圖之L1所示之工作輥1 lgW軸中心與殼 體立設部1 1 gr、1 1 gr之下步驟側端面的距離，係大於工作 輥1 1 gw之半徑r 1。所以，在相當於l 1 -r 1之部位，可以如 後所述之方式配置冷卻裝置2 0之一部分。亦即，可以使該 冷卻裝置20之一部分插入殼體llgh內側之方式來設置。 -12- 201114513 此外，如第3圖所示，冷卻裝置20插入殼體立設部 1 lgr、1 lgr間之部位，於冷卻裝置20下面導引部40之鋼板 板寬度方向的延長線上存在著當做側壁使用之殼體立設部 ：[lgr、1 lgr。其次，於該下面導引部40鋼板板寬度方向端 部與殼體立設部1 1 gr、1 1 gr之間，形成有特定間隙。 其次，針對冷卻裝置20進行說明。冷卻裝置20，具備 :上面供水手段21、21、...、下面供水手段22、22、…、 上面導引部30、30、…、下面導引部40、40、…、以及整 流手段5 0、5 0。 上面供水手段2 1、2 1、·..，係對鋼板1上面側供應冷 卻水之手段，具備：配設於冷卻集流管2 1 a、2 1 a、...、配 設於各冷卻集流管21a、21a、...之複數列導管21b、21b、 …、以及裝設於該導管21b、21b、…前端之冷卻噴嘴21c 、2 1c、· · · 〇 本實施形態時，由第2圖及第3圖可以得知，冷卻集流 管2 1 a係延伸於鋼板板寬度方向的配管，此種冷卻集流管 21a、21a、...並列於通板方向。 導管2 1 b，係從各冷卻集流管2 1 a進行分歧之複數細配 管，其開口端部朝向鋼板上面側。複數之導管2 1 b、2 1 b、 …’係沿著冷卻集流管2 1 a之管長度方向，亦即，於鋼板 板寬度方向配設成梳齒狀。 於各導管21b、21b、…之前端，裝設著冷卻噴嘴21c 、2 1 c、...。本實施形態之冷卻噴嘴2 1 c、2 1 c、…，係可 形成扇狀冷卻水噴流（例如，5 m m〜3 0 m m程度厚度）之扁 -13- 201114513 平型噴灑噴嘴。第4圖及第5圖係利用該冷卻噴嘴21c、21c 、…於鋼板表面形成冷卻水噴流之模式圖。第4圖係透射 圖。第5圖係該噴流衝擊鋼板表面時之衝擊形態的槪略圖 。第5圖中，白圓點係表示冷卻噴嘴21c、21c、...之正下 方位置，粗線係表示冷卻水噴流之衝擊位置、形狀。第4 圖及第5圖中，係同時圖示著通板方向及鋼板板寬度方向 〇 由第4圖及第5圖可以得知，本實施形態時，相鄰噴嘴 列係以鋼板板寬度方向之位置偏離的方式配置，其次，其 相鄰噴嘴列與鋼板板寬度方向位置相同，而爲所謂棋盤狀 配列。 本實施形態時，係以冷卻水噴流至少通過鋼板表面鋼 板板寬度方向之全部位置2次之方式來配置冷卻噴嘴21c、 21c、...》亦即，通過鋼板之某點ST，係沿著第5圖之直線 箭頭移動。此時，以噴嘴列A爲2次（Al、A2 )、噴嘴列B 爲2次（B1、B2)、噴嘴列C爲2次（C1、C2)、…之方式 ，於各噴嘴列，使來自該噴嘴列所屬冷卻噴嘴2 1 c、2 1 c、 …之噴流進行2次衝擊。所以，冷卻噴嘴之間隔Pw、冷卻 水噴流之衝擊寬度L、扭轉角々之間，應以 L = 2Pw/cos β 之關係成立之方式來配置冷卻噴嘴2 1 c、2 1 c、.…。此 處，雖然爲通過2次，然而，並未受限於此，亦可以爲通 過3次以上之構成。此外，以追求鋼板板寬度方向冷卻能 力均一化的觀點而言，於通板方向，相鄰噴嘴列應以互相 -14- 201114513 相反之方向來扭轉冷卻噴嘴° 此外，冷卻噴嘴之配列決定鋼板冷卻相關之「均一冷 卻寬度」。其於配置之噴嘴群之性質上，係代表被搬運鋼 板均一冷卻之鋼板寬度方向的大小。具體而言’通常’鋼 板之製造裝置可製造之最大鋼板寬度爲一致。具體而言’ 例如，係第5圖R Η所示之大小。 此處，本實施形態時’如上面所述之相鄰噴嘴列’係 以互相相反方向扭轉冷卻噴嘴之形態來進行說明。但是’ 並不一定限定爲此，亦可以爲全部朝相同方向扭轉之形態 。此外，扭轉角（上述/5 )亦無特別限制，以必要冷卻能 力及設備配置狀態等觀點而言’可以適度地決定。 此外，本實施形態時’從上述優點之觀點而言’於通 板方向相鄰之噴嘴列係棋盤狀配列之形態。然而，並未受 限於此，亦可以爲冷卻噴嘴於通板方向並列於直線上之形 態。 具備上面供水手段2 1之位置，尤其是，配置著冷卻噴 嘴2 1 c、2 1 c、...之位置，並無特別限制。但是，熱軋輥軋 機列1 1之最終軋台1 1 g之後，應以從該最終軋台1 1 g之殻體 1 1 gh之內側極靠近該最終軋台1 1 g之工作輥1 1 gw之方式 來配置。此種配置，可以對利用熱軋輥軋機列1 1進行輥軋 後之鋼板1實施急冷。此外，可以安定地將鋼板1前端部誘 導至冷卻裝置2 0。本實施形態時，由第2圖可以得知，靠 近工作輥llgw之冷卻噴嘴21c、21c、…係以接近鋼板1之 方式配置。 -15 - 201114513 其次，基本上，從各冷卻噴嘴2 1 c、2 1 c、...之冷卻水 噴射口所噴射之冷卻水的噴射方向係垂直方向。然而，來 自最靠近最終軋台llg之工作輥llgw之冷卻噴嘴21c、21c 、..·的冷卻水噴射，應比垂直更爲傾向工作輥1 1 gw之方向 。藉此，從鋼板1於最終軋台1 1 g被下壓至開始冷卻爲止之 時間可進一步縮短，也可使輥軋所蓄積之輥軋變形的復原 時間幾乎成爲零。所以，可以製造具有更微細組織之鋼板 〇 下面供水手段2 2、2 2、·..，係對鋼板1下面側供應冷 卻水之手段。下面供水手段22、22 ' ...，具備：配設於冷 卻集.流管22a、22a、…、配設於各冷卻集流管22a、22a、 …之複數列導管22b、22b、...、以及裝設於該導管22b、 22b、…前端之冷卻噴嘴22c、22c、…。下面供水手段22 、22、…，係與上述上面供水手段21、21、...相對配設， 冷卻水之噴射方向雖然不同，然而，大致與上面供水手段 21、21、…相同，此處省略其說明。 其次，針對上面導引部30進行說明。第6圖係上面導 引部30之槪念圖。第6 ( a)圖係從冷卻裝置20上方觀看上 面導引部30時之部分剖面圖。第6(b)圖係側面圖。第6 圖係同時圖示著冷卻噴嘴21c、21c、...之位置、及鋼板1 之位置。 上面導引部30，具備：板狀導引板31、及配置於導引 板3 1上面側之排水通路形成部3 5、3 5、...。 導引板3 1，係板狀之構件，且配設著流入孔3 2、3 2，. -16- 201114513 ...、及流出孔 3 3、3 3、·..。 流入孔32、32、…係配設在對應於上述冷卻噴嘴21c 、2 1 c、...之位置，其形狀亦對應於噴流之形狀。所以’ 流入孔3 2、3 2、…並列於鋼板板寬度方向而形成流入孔列 32A且該流入孔列32A、32A、…並列於通板方向。此處’ 流入孔之形狀並無特別限制，只要以來自冷卻噴嘴之噴流 儘量不衝擊導引板之方式形成即可。具體而言，當然也是 依據所使用之冷卻噴嘴的噴流特性，然而，應爲來自1個 冷卻噴嘴2 1 c之單位時間冷卻水噴出量的1 0%以上不會衝擊 上面導引部30之導引板3 1而通過之形狀。其次，從有效利 用有限空間來配設該流入孔32、32、...之觀點而言，流入 孔之開口形狀應類似於冷卻水噴流之橫剖面形狀（垂直於 噴出方向軸之剖面）。 另一方面，流出孔3 3、3 3 '…係矩形之孔，該孔係複 數並列於鋼板板寬度方向而形成流出孔列3 3 A。藉由於流 出孔3 3、3 3、...之間殘留部分導引板3 1，而防止被搬運之 鋼板1前端突入至流出孔33、33、·.·，因而成爲防止鋼板 侵入手段3 3 s、3 3 s、…。該流出孔列3 3 A、3 3 A、...係配置 於上述流入孔列32 A ' 32 A、...之間。 亦即，導引板3 1係沿著通板方向交錯配置著流入孔列 32A及流出孔列33A。 此處，流出孔3 3、3 3、_.·之良好開口形狀，係以如上 述之並列矩形來進行說明。藉此，可以利用有限空間有效 地得到較大開口面積。但是，並未受限於此，只要可確保 •17- 201114513 適當排水量，可防止鋼板之卡住即可。亦即，流出孔 口形狀並未限定爲上述之矩形，例如，亦可以爲圓形 形。其次，防止鋼板侵入手段係對應該開口形狀之形 例如，流出孔爲於通板方向具有上底及下底之梯形時 止鋼板侵入手段亦可以爲從通板方向傾斜之平行四邊 形狀。 第7圖係流出孔之變形例圖。第7圖之變形例之上 引部30’時，只有流出孔33’不同而其他部位與上述上 引部30相同，故針對該相同部位，使用相同符號，並 說明。上面導引部3 0 ’之1個流出孔3 3 ’，係於板寬度方 1個長孔33 A’且於該處張貼著網材33B’之形態。亦可 形成流出孔。網材33B’之所謂網目細度，從對冷卻水 動影響較小且不易發生渣滓等異物阻塞之觀點而言， 5mmx5mm以上之網目。 此外，流出孔3 3、3 3、...之邊緣當中，從垂直相 通板方向之方向的邊緣朝上方立設著逆流防止片3 3p、 、…。該逆流防止片3 3 p、3 3 p、...係以防止進入流出 、3 3、...之水再從流出孔3 3、3 3、...逆流至原來位 目的而配設者，藉由配設該逆流防止片33p、33p、... 以確保更多排水量而提高排水性。 本實施形態時，逆流防止片33p、33p、...係以大 行之方式立設，然而，亦可以其下端窄於上端側之方 立設逆流防止片。藉此，可以確保逆流防止片與後述 通路形成部之立設片（35a、35c)間有較寬之流路剖 之開 或梯 狀。 ，防 形之 面導 面導 省略 向有 藉此 之流 應爲 交於 3 3 p 孔33 置爲 ，可 致平 式來 排水 面積 -18 - 201114513 排水通路形成部3 5、3 5、…，由第6 ( b )圖可以得知 ，係具有由片35a、35b、3 5c所圍繞而成之凹狀剖面而於 鋼板板寬度方向延伸之構件。排水通路形成部3 5，係以使 凹狀開口部朝向該導引板3 1而從導引板3 1上面側進行覆蓋 之方式來配置。此時，開口部，亦即，係以包含導引板3 1 上面之一部分及流出孔列33 A在內之方式覆蓋於片3 5 a及片 3 5 c之間。此外，相鄰排水通路形成部3 5、3 5、...之間具 有特定間隔，流入孔列32A、32A、...、及冷卻噴嘴21c、 2 1 c、...配置於該間隔之間。 此外，與流出孔列33 A相對之片35b當中，於流出孔列 3 3 A側，在該流出孔列3 3 A之正上方位置配設著整流片3 6 。整流片36之形狀，應爲可使衝擊片35b之排水以如後面 所述之方式而分離成朝向配設著逆流防止片33p、3 3p之排 水通路底面方向來進行整流化之形狀。例如，可以考慮倒 三角形、梯形、楔形或其他突起型形狀。 此處，排水通路形成部3 5 ' 3 5、...之高度，並無特別 限制，然而，上述上面供水手段2 1之導管2 1 b、2 1 b、...之 內徑爲d時，應在於5d〜20d之範圍。其係因爲導管21b、 21b、...若大於20d，壓力損失較大而較不好，此外，若小 於5d，則從冷卻噴嘴之噴射可能不安定。 如以上所示之上面導引部3 0，以第2圖所示之方式配 置。本實施形態時，係使用3個上面導引部3 0、3 0、3 0， 並列於通板方向。任一上面導引部3 0、3 0、3 0皆以對應冷 -19- 201114513 卻噴嘴2lc、21c、…之尚度方向位置來配 施形態時，最接近最終軋台i i g之上面導 終軋台1 1 g側端部較低而另一端側較高之 。其他2個上面導引部30、30，係以與通 隔而與該通板面大致平行之方式配置。 利用此種上面導引部30，因爲上面導 能’可以解決鋼板前端部通過時該前端音 、21c、…等卡到的問題。 其次，藉由上面導引部30，可以適度 上面側之大量冷卻水排出。首先，上面供 …所供應之冷卻水在進行鋼板冷卻後，其 板寬度方向並流至下方來進行排水。然而 量 '流量密度較大時，將無法進行充份排 滯留水。相對於此，上面導引部30，藉由 通路而使滯留水維持於較薄之狀態。詳細 第8圖係其說明圖。第8圖中，爲了容 符號，然而，可對應參照第6(b)圖之符 量密度、冷卻水供應量爲鋼板板寬度方向 施時，來自冷卻噴嘴21c、21c、…之水勢 ，朝鋼板1上面噴射之冷卻水，如第8圖箭 會於通板方向前後移動、衝擊。產生此種 的方向會改變，而如箭頭S所示，朝上方 孔3 3、3 3、…而衝擊於排水通路形成部3 ，如上面所述，於該片35b配設著楔形整 置。亦即，本實 引部30，係以最 傾斜方式來配置 板面具有特定間 引部30之基本機 β被冷卻噴嘴2 1 c 地將供應給鋼板 水手段2 1、2 1、 一部分流向鋼板 ，供應之冷卻水 水而形成較厚之 進一步形成排水 如下面所示。 易理解，省略了 號。高冷卻水流 排水無法充份® 也會很強。此日寺 頭R、R所示’也 衝擊時，冷卻水 移動並通過流出 5之片3 5 b。此時 流片3 6，冷卻水 -20- 201114513 進行如箭頭τ、T所示之方向轉換。此時’利用 以將該方向轉換之抵抗確實且有效地抑制於較 藉此，到達導引板31上面側之冷卻水於身 遠/近方向移動並排水。此時’因爲流出孔3 3 著逆流防止片33ρ、33ρ ’可以抑制冷卻水再度 33 ° 如上所示，藉由進一步配設排水手段’即 供應大量、高水量密度之冷卻水時’亦可抑制 。此外，因爲分成冷卻水之供水孔及排出孔且 所述之構造來進行冷卻用冷卻水的排水，於途 移動之.冷卻水的情形獲得抑制。藉此，可以順 水，而使滯留水之厚度較薄，進而提高冷卻效 藉由如上所示之順暢排水及抑制滯留水， 板寬度方向之冷卻差抑制於較小。藉此，可以 一品質之鋼板。冷卻差，冷卻水之板寬度方向 ±3 0°C以內。 此處，係將1個流出孔列33 A所含有之流出 ...配置於上面導引部30之鋼板板寬度方向全面 未受限於此。例如，亦可只於滯留水厚度呈現 鋼板板寬度方向中央部附近配設此種流出孔。 到達導引板3 1上面之冷卻水從導引板3 1之 方向兩端進行排水時，亦可增設進一步提高其 成。例如，如以下所示者。 於導引板3 1上面側，以較高之方式來形成 整流片3 6可 低。 ξ 8圖之圖面 之邊緣配設 流回流出孔 使對上面側 滯留水之量 利用如上面 中衝擊開始 利進行供排 率。 亦可將鋼板 得到具有均 溫度差應爲 孔 3 3、3 3、 ，然而，並 較大傾向之 鋼板板寬度 排水性之構 板寬度方向 -21 - 201114513 中央而朝鋼板板寬度方向兩端降低之傾斜方式來配設亦可 。藉由高低差，排水容易移向導引板3 1兩端，而可更順暢 的促進排水。 此外，亦可設置泵等來進行強制排水、或使排水通路 形成部內形成負壓而容易將冷卻水導入排水通路形成部內 ，來進一步提高排水性。 此外，亦可以爲以於上下方向移動之方式來形成上面 導引部本身，使上面導引部30在對通板不會造成影響之範 圍朝下方移動來壓迫滯留水，強制地將冷卻水導入排水通 路形成部內之構成。 此外，配設於導.引板3 1之流入孔3 3、3 3、...及鋼板板 寬度方向兩端部，亦可對其邊緣部分（邊緣）進行倒角或 形成圓角（使邊緣形成爲圓弧狀）之處理。藉此，可以減 少通過之鋼板被卡住，亦可促進冷卻水之順利流動。 導引板31之材質，可以使用具有導引必要強度及耐熱 性的一般材料，並無特別限制。但是，以減少通過之鋼板 1接觸導引板31時對鋼板1所造成之擦傷等爲目的’沒有強 度及耐熱問題之部位亦可以使用比鋼板1更爲軟質之樹脂 等材料。 第9圖係其他形態之上面導引部130、130’當中相當於 第6(b)圖之圖。第9(a)圖係上面導引部130’第9(b )圖係上面導引部130’。此處，針對與上述上面導引部30 共同之構件，亦以相同符號表示，並省略其說明。 上面導引部130時，排水通路形成部135、135、…係 -22- 201114513 以從導引板3 1分離之形式來形成。所以，排水通路形成部 135、135、…時，片35a、35a、…與逆流防止片33p、33p 、…係以底板135d、135d、...進行連結’片35c、35c、… 與逆流防止片3 3 p、3 3 p、.，·係以底板丨3 5 e、丨3 5 e、…進行 連結’而形成排水通路之底部。亦可採用此種上面導引部 1 30 〇 上面導引部130’係逆流防止片133ρ’、ι33ρ’、…更延 伸於導引板3 1上面側之形態》 第10圖係另一其他形態之上面導引部230、230’當中 相當於第6(b)圖之圖。第l〇(a)圖係上面導引部23 0， 第10(b)圖係上面導引部230’。此處，針對與上述上面 導引部3 0、1 3 0共用之構件，亦以相同符號表示，並省略 其說明。 上面導引部230時，排水通路形成部23 5、23 5、...係 以從導引板3 1分離之形式來形成。所以，排水通路形成部 235、235、…時，片35a、35a、…與逆流防止片233p、 233p、...係以底板235d、235d、…進行連結，片35c、35c 、…與逆流防止片233p、233p、…’係以底板235e、235e 、…進行連結，而以底板2 3 5 d、2 3 5 d、...、及底板2 3 5 e、 23 5 e、...來形成排水通路之底部。此外，逆流防止片23 3 p 、2 3 3 p、...更延伸於導引板3 1上面側。上面導引部2 3 0於 導引板3 1與排水通路形成部2 3 5、2 3 5、…之間，除了冷卻 噴嘴21c、21c、…以外，亦含有集流管21a、21a、...及導 管21b、21b、…。亦可採用此種上面導引部230。 -23- 201114513 上面導引部230’時，於上述上面導引部230’將相鄰 之排水通路形成部235、23 5當做1個排水通路形成部23 5’ 使用。藉此，亦可確保第10(b)圖中以Τ’表示之排水路 徑。藉此.，可以增大排水路徑（τ ’）之流路剖面積° 以上，係針對其〗例之上面導引部進行說明’然而’ 上面導引部不必受限於此’亦可使用眾所皆知之上面導引 部。 其次，針對下面導引部40進行說明。下面導引部40係 配置於下面供水手段22與被搬運之鋼板1之間的板狀構件 。藉此，尤其是’使鋼板1通過該製造裝置時’可以防 止鋼板1最前端被下面供水手段22、22、…及搬運滾輪12 、12、...卡住。另一方面，於下面導引部4〇，配設著供來 自下面供水手段22之噴流通過的流入孔。藉此，來自下面 供水手段22之噴流可通過該下面導引部40而到達鋼板下面 ，來進行適度的冷卻。 此處所使用之下面導引部40，形狀並無特別限制，可 以使用眾所皆知之下面導引部。 此種下面導引部40 ’係以第2圖所示之方式配置。本 實施形態時，係使用4個下面導引部40、40、···，分別配 設於搬運滾輪12、12、12之間。任一下面導引部40、40、 …，皆以比搬運滾輪12、12、…上端部稍低但不過低之高 度來進行配置。 本實施形態時，係以具備下面導引部之例進行說明， 然而，並非一定要配設下面導引部。 -24 - 201114513 整流手段5 0、5 〇，係具有第3 ( a )圖所示之圓弧狀剖 面而於通板方向延伸之板狀的一對構件。此種整流手段5 〇 、5 0，具有朝上方之圓弧狀剖面的凸側面。亦即，一對相 對之整流手段5 0、5 0，係以其上端部之間隔較窄之方式來 形成，至少’以下端部之間隔寬於該上端部之方式來配置 。第3 ( a )圖之形態時，該上端部係以接觸或接近上面導 引部3 0之方式來配設。另一方面，其下端部則接觸於殼體 立設部 1 1 gr、1 1 gr。 此外，整流手段5 0、5 0之配置位置，係大致如下所示 之位置。亦即，在鋼板板寬度方向，於殼體立設部1 1 gr、 1 lgr與上面導引部30端部之間，形成著間隙。整流手段50 、50係配置於該形成之間隙當中之相當於上面導引部30與 下面導引部40之垂直方向間之位置。所以，係配置於如下 所示之位置，亦即，供應給鋼板上面之冷卻水，如第3圖 之箭頭D、D所示，被分成鋼板板寬度方向來進行排水時 ，可以進行水之整流的位置。 未配設整流手段時，流動於鋼板板寬度方向之水會衝 擊殻體立設部而分別朝垂直方向上下移動。此種激烈之方 向轉換，係流動抵抗的一個要因。此外，分別朝上下移動 之水當中，向上之水終究因爲重力而朝下方移動，而與向 下移動之水合流。因此’也會產生流動抵抗。上述流動抵 抗成爲冷卻水之排水整體的流動抵抗’而成爲妨礙順暢排 水的原因之一。尤其是，爲了提高冷卻能力而增加冷卻水 量時，此種現象更爲顯著，有時因而得到適度冷卻。此外 -25- 201114513 ，衝擊側壁並朝上方移動之部分排水到達上面導引部上面 ，可能形成滯留水，而成爲冷卻噴嘴前端被水淹没的原因 之一。 相對於此，藉由具備上述整流手段50、50，可以順利 地進行使冷卻水朝向下方之方向轉換，並導引至排水方向 。所以，即使增加冷卻水量，亦可抑制流動抵抗變大，進 而提高排水性。其次，可維持高冷卻能力，進而製造機械 性能優良之鋼板。 本實施形態時，整流手段50、50係以剖面爲圓弧狀時 進行說明，然而，並非一定爲圓弧狀，如上面所述，只要 可順利進行排水之方向轉換，亦可以爲其他形狀。例如， 可以爲非圓弧狀之曲線、傾斜之直線、或直線之組合等。 此外，第3 ( b )圖係變形例。第3 ( b )圖之例時，係 以整流手段50’、50’之下端於殻體立設部11 gr、11 gr之間 具有特定間隙之方式來配置。藉由配設此種間隙’存在於 上面導引部30上面而應該被排除的水’藉由箭頭D、D所 示之排水噴射器效果，而被朝箭頭D’、D’所示之方向吸入 並流動，促進順暢排水。 如上面所述，存在於上面導引部30上面之水，例如， 流過上述上面導引部3 〇之排水路徑形成部3 5的水、及從上 面導引部3 0之流入孔逆流之水。 回到第2圖，繼續對熱軋鋼板之製造裝置10進行說明 。搬運滾輪1 2、1 2、…係鋼板1之工作台且用以於通板方 向搬運該鋼板1之滾輪。如上面所述’於搬運滾輪12、12 -26- 201114513 、…之間，配置著下面導引部40、40、…。 夾壓滾輪1 3，兼具有泄水功能，而配設於冷卻裝置20 之下步驟側。藉此，可防止於冷卻裝置20內噴射之冷卻水 流出至鋼板1之下步驟側。其次，可抑制冷卻裝置20之鋼 板1波動，尤其是，可以提高鋼板1前端被捲取機咬入前之 鋼板1通板性。此處，夾壓滾輪1 3之滾輪當中之上側滾輪 13a，如第1圖所示，可上下移動。 利用上述熱軋鋼板之製造裝置，例如，可以下述方式 進行鋼板之製造。亦即，從以捲取機捲取鋼板至開始下次 鋼板輥軋爲止之非輥軋時間，停止冷卻裝置20之冷卻水噴 射。其次，冷卻裝置2 0之下步驟側夾壓滾輪1 3，於上述非 輥軋時間中，使上側滾輪13a移動至高於冷卻裝置20之上 面導引部30的位置，其後，開始下一次之鋼板輥軋。 該下一鋼板之前端到達夾壓滾輪1 3時，開始利用冷卻 水噴射進行冷卻。此外，鋼板1前端通過夾壓滾輪1 3後’ 使上側滾輪13a下降，開始鋼板1之夾壓。 從鋼板1前端被搬入冷卻裝置2 0內之前開始冷卻水噴 射，可以縮短鋼板前端之非穩定冷卻部的長度。其次，藉 由噴射冷卻水，可以使鋼板1之通板性安定化。亦即，鋼 板1浮起而接近上面導引部30時，鋼板1從冷卻噴嘴21c、 2 1 c、...所噴射之冷卻水噴流承受到之衝擊力增加，而對 鋼板1產生垂直方向之向下作用力。所以，即使鋼板1衝擊 上面導引部3 0時，從冷卻水噴流所承受到的衝擊力，可以 緩和該衝撃力，而且，可以降低鋼板1與上面導引部3 0之 -27- 201114513 摩擦熱，故減少發生於鋼板表面之擦傷。 所以，藉由於熱軋輥軋機列11之下流側具備此種操作 之冷卻裝置20的熱軋鋼板之製造裝置10，來製造熱軋鋼板 ，可以使用高密度、大量之冷卻水來進行冷卻。亦即，藉 由此種製造方法來製造熱軋鋼板，可以製造組織微細化之 熱軋鋼板。 此外，熱軋輥軋機列11之通板速度，除了通板開始部 分以外，亦可以爲一定。藉此，可以製造鋼板全長具有更 高機械強度之鋼板。 如以上所示之冷卻水排水時，具體而言，其排水性能 ，可以依據必要之鋼板冷卻熱量來適度決定，並無特別限 制。但是，如上面所述，從鋼板組織微細化之觀點而言， 輥軋後之急冷係有效果的，所以，應供應高流量密度之冷 卻水。所以，排水亦只要能確保對應於該冷卻水之供應量 、流量密度的排水性能即可。從上述鋼板微細化之觀點而 言，供應之冷卻水的流量密度可以爲10〜25m3/(m2·分 )»亦可以爲更大之流量密度。 第11圖係具備第二實施形態之冷卻裝置120之熱軋鋼 板之製造裝置110的說明圖，係相當於製造裝置10之第3圖 。熱軋鋼板之製造裝置Π0時，係冷卻裝置120之整流手段 150不同於冷卻裝置20之整流手段50。其他構成因爲與製 造裝置10共用，故此處省略說明，其符號亦共用。 整流手段1 50、1 50，係用以噴射第1 1圖所示之氣體的 噴射裝置。此種整流手段1 5 0、1 5 0，其噴射口應朝向下方 -28- 201114513 且配置於殼體立設部llgr、1 lgr與上面導引部30端部之間 〇 亦即，對鋼板上面供應之冷卻水流動如第3圖箭頭E、 E所示，係可從其上方噴射氣體來進行補助之位置。 藉此，可以強制地使冷卻水朝下方移動，而導引至排 水方向。所以，增加冷卻水量亦可抑制流動抵抗的變大， 而可提高排水性。其次，可維持高冷卻能力，而可製造機 械性能優良之鋼板。 此處，係單獨使用整流手段1 5 〇、1 5 0之實施形態，然 而，並未受限於此’亦可組合使用上述第一實施形態之整 流手段5 0、5 0。藉此，可進一步提高排水性能。 第12圖係具備第三實施形態之冷卻裝置220、220,之 熱軋鋼板之製造裝置210、210’的說明圖，係相當於製造 裝置10之第3圖。第12(a)圖係製造裝置210，第12(b) 圖係製造裝置210’。熱軋鋼板之製造裝置210、210’時，係 冷卻裝置22〇、220’之整流手段25〇、250’不同於冷卻裝置 20之整流手段50。其他構成因爲與製造裝置1〇共用，故此 處省略說明，其符號亦共用。 整流手段2 5 0、25 0，如第1 2 ( a )圖所示，係以封閉 上面導引部30、與殻體立設部llgr、llgr之間的方式來配 設。另一方面’整流手段2 5〇’、250’，係以從上面導引部 3 0之寬度方向兩端朝上方延伸之方式配設。 藉此，如箭頭F、F、F’、F’所示之排水衝擊殻體立設 部1 1 gr、1 1 gr，即使其一部分朝上方移動而進入上面導引 -29- 201114513 部30上面，亦可防止滯留。 但是，此時，確保了上面導引部30之排水通路形成部 、及從流入孔逆流而到達上面導引部30上面之冷卻水的排 水路徑。 第13圖係具備第四實施形態之冷卻裝置320之熱軋鋼 板之製造裝置310的說明圖，係相當於製造裝置10之第3圖 。熱軋鋼板之製造裝置3 1 0，係冷卻裝置320之整流手段 3 5 0不同於冷卻裝置20之整流手段50。其他構成因爲與製 造裝置10共用，故此處省略說明，其符號亦共用。 整流手段350、350，如第13圖所示，具備分流手段 360、360及排水手段370、370。 分流手段360、3 60係具有楔形剖面之長方形構件，具 有如第1 3圖所示之楔形剖面而延伸於通板方向。分流手段 3 60、3 60，應配設於對鋼板上面供應之冷卻水在鋼板板寬 度方向移動時所衝擊之殼體立設部11 gr、11 gi·面。 排水手段370、370，係以管狀構件之長度方向做爲通 板方向之方式來配置的構件。此外，於管壁之一部分，由 第1 3圖可以得知，配設著開口部Η、Η。此種排水手段3 70 、3 70，係配置於上面導引部30端部與殼體立設部llgr、 1 1 g r之間。 依據整流手段3 5 0、3 50，對鋼板上面供應之冷卻水朝 鋼板板寬度方向兩側流動來進行排水。其次，該排水利用 分流手段3 60、3 60之楔形效果，可以抑制流動抵抗而分別 朝上下流動。朝下方之排水，係進行第1 3圖G、G所示之 -30- 201114513 排水。另一方面，因爲分流手段3 60、3 60而朝上方移動之 排水，進行第13圖G’、G’所示之流動，而從排水手段370 、3 70之開口部Η、Η進入管內。進入管內之排水於管長度 方向移動，並從其他部位進行適度排水。 所以，朝鋼板板寬度方向流動之水，藉由分流手段 3 60、3 60，可以抑制流動抵抗並分別朝垂直方向之上下移 動。此外，該分別朝上下移動之水當中，朝上之水不會因 爲重力而回到下方，而由排水手段3 7 0、3 7 0進行回收、排 水。所以，可以防止朝上方移動之水再度朝下方移動而產 生流動抵抗。 藉此，可以抑制排水時之流動抵抗，而提高排水性。 其次’可維持高冷卻能力，而可製造機械性能優良之鋼板 〇 上述各實施形態時，存在於冷卻裝置外側之側壁係以 最終軋台之立設部爲例來進行說明，然而，該側壁並未受 限於此’亦可以爲與其他裝置之配置關係而產生之該其他 裝置的側壁。 [實施例] 以下’依據實施例’針對本發明進一步進行詳細說明 。但是，本發明並未受限於該等實施例。 實施例時，針對第3 (a)圖（No.1)、第12(a)圖 (N 〇 . 2 )、及第1 3圖（N 〇 . 3 )所示之例之排水性進行調查 。此外’亦針對未具備整流手段之例（比較例，No .4 )進 -31 - 201114513 行相同調查。此處，與均一冷卻寬度相等之長度之通板的 鋼板板寬度爲1.6m，鋼板之均一冷卻寬度方向端部與殼體 立設部之距離則爲〇.2m及0.4m之2種。此外，冷卻水之流 量密度爲20 ( m3/ ( m2 ·分））。 排水性之評估，·係以冷卻噴嘴是否被水淹沒來判斷， 被水淹沒時爲「X」，冷卻噴嘴未被水淹沒時之所謂一半 被水淹沒狀態時爲「△」。此外。上面導引部上滞留著少 量冷卻水但冷卻噴嘴未被水淹沒時爲「〇」，未發現上面 導引部上有冷卻水之滯留時爲「◎」。結果如表1所示。 [表1] 鋼板寬度方向端部與殼體立設部之距離 0.2m 0.4m No. 1 ◎ ◎ No.2 〇 〇 No.3 ◎ ◎ No.4 X Δ 從表1可以得知，No.4之比較例時’其評估爲X或△’ 尤其是，鋼板之均一冷卻寬度方向端部與殼體立設部之距 離爲0.2m時，冷卻噴嘴之前端被水淹沒。相對於此，Ν〇·1 〜No . 3所示之例時，冷卻噴嘴前端皆未被水淹沒’而確認 可順暢排水。 以上，係現時點之實踐情形’係以良好實施形態來針 對本發明進行說明，然而’本發明並未受限於本專利申請 說明書所示之實施形態’在未違背從申請專利範圍及說明 -32- 201114513 書整體所讀取之發明要旨或思想之範圍，可以適度進行變 更，而因爲該等變更所產生之熱軋鋼板之冷卻裝置、熱軋 鋼板之製造裝置、以及熱軋鋼板之製造方法亦包含於本發 明之技術範圍內。 【圖式簡單說明】 第1圖係具備第一實施形態之冷卻裝置之熱軋鋼板之 製造裝置的部分模式圖。 第2圖係配設著第1圖之冷卻裝置之部分放大圖。 第3圖之第3 ( a)圖係第2 ( a)圖之III-III透視剖面圖 。第3 ( b )圖係變形例圖。 第4圖係冷卻噴嘴之說明圖。 第5圖係冷卻噴嘴之另一說明圖。 第6圖係上面導引部之說明圖。 第7圖係上面導引部流出孔之其他例說明例。 第8圖係上面導引部之冷卻水流動的說明圖。 第9圖係上面導引部之其他形態例圖。 第1 0圖係上面導引部之另一其他形態例圖。 第1 1圖係第二實施形態之冷卻裝置的說明圖。 第1 2圖係第三實施形態之冷卻裝置的說明圖。 第1 3圖係第四實施形態之冷卻裝置的說明圖。 【主要元件符號說明】 1 :鋼板 -33- 201114513 10、 110、 210、 210’、 310：製造裝置 1 1 :輥軋機列 1 1 g :最終軋台 1 lgh :殼體 llgr :(殻體）立設部（側壁） 12 :搬運滾輪 1 3 :夾壓滾輪 20、 120、 220、 2205 > 320 ：冷卻裝置 2 1 :上面供水手段 2 1 a :冷卻集流管 21b :導管 2 1 c :冷卻噴嘴 22 :下面供水手段 22a :冷卻集流管 22b :導管 2 2 c :冷卻噴嘴 30、30、130、130’、230、2 3 05 ：上面導引部 40 :下面導引部 50、 150、 250、 2505、 350 ：整流手段 -34-[Technical Field] The present invention relates to a cooling device for a steel sheet used in a hot-rolled steel sheet manufacturing line, a manufacturing apparatus for a hot-rolled steel sheet, and a method for producing a steel sheet. Specifically, it relates to a cooling device for a steel sheet excellent in cooling water drainage property, a manufacturing device for a hot rolled steel sheet, and a method for producing a steel sheet using the same. [Prior Art] Steel materials used for automobiles and structural materials are required to have excellent mechanical properties such as workability and toughness. In order to comprehensively improve these mechanical properties, the miniaturization of steel structures is an effective method. Therefore, everyone is looking for ways to obtain steel with fine microstructure. Further, if the structure can be made fine, even if the amount of the alloying elements is reduced, a high-strength hot-rolled steel sheet having excellent mechanical properties can be produced. The method of miniaturization of the structure, in the hot rolling and rolling, especially in the latter stage, is subjected to high-pressure rolling, so that the Worstian iron particles are greatly deformed, and the transformation density is increased, thereby pursuing the miniaturization of the fat particles after cooling. The method is well known to everyone. Secondly, from the viewpoint of suppressing the recrystallization and recovery of the Worthite iron and promoting the metamorphism of the fat and granules, the steel plate is cooled to 600 ° C to 7 ° ° C in a short time after rolling. Methods. Namely, after the hot rolling and rolling, it is effective to provide a cooling device which can be cooled faster than the conventional one to perform the steel plate quenching after the rolling. Next, when the steel sheet after the rolling is subjected to rapid cooling, in order to increase the cooling capacity, the amount of cooling water per unit area of the steel sheet injection can be increased, that is, the flow density can be increased. 201114513 However, as shown above, when the amount of cooling water and the flow density are increased, the water remaining on the steel sheet (stagnation water) increases on the steel sheet due to the relationship between water supply and drainage. On the other hand, the amount of water remaining between the guide portion and the steel plate below the lower side of the steel plate increases. This type of retained water is used in the water after the steel plate is cooled. In order to supply the water supplied from the cooling nozzle to the steel plate to ensure the cooling capacity, it should be discharged as soon as possible. In addition, because the layer of water is retained in the water, if it is thick, it will resist, and the water from the cooling nozzle will not reach the steel plate effectively. Then, the flow rate of the retained water from the central portion to the end portion of the steel sheet increases as the flow velocity increases toward the end portion of the steel sheet, and the amount of retained water increases, and the difference in cooling in the width direction of the steel sheet increases. In addition, if the amount of retained water is excessively increased, stagnant water will also appear on the upper guide portion, and the front end of the cooling nozzle will be submerged. As described above, since it is effective to perform rapid cooling as soon as possible after hot rolling, it should be cooled immediately after the work rolls of the final rolling stand of the hot rolling mill. That is, cooling water is sprayed on the steel sheets existing inside the final rolling mill housing of the hot rolling mill train to be cooled. Such cooling is as shown in Patent Document 1. [Patent Document 1] Japanese Patent No. 402987 1 SUMMARY OF THE INVENTION Among the cooling water sprayed onto the upper surface side of the steel sheet, most of the cooling water is moved in the width direction of the steel sheet, and flows downward to be discharged. However, in the case of the inside of the casing of the final rolling mill in the hot rolling mill, the side walls of the standing portion of the casing or the like may be disposed on both sides in the width direction of the steel sheet. At this time, when the cooling water is sprayed on the steel plate, the side wall may hinder the drainage of the cooling water, and the wall of the drainage impact side -6-201114513 and the part of the cooling water moving upward may be retained in the upper guide portion so that the front end of the cooling nozzle is Water is drowning. Patent Document 1 describes an invention for improving the drainage performance of the upper guide portion. However, when a large amount of cooling water is used to improve the cooling performance, it is also important to improve the drainage performance from both sides in the width direction of the steel sheet. Therefore, in view of the above problems, an object of the present invention is to provide a cooling device having excellent drainage properties in a hot-rolled steel sheet manufacturing line, a manufacturing apparatus for hot-rolled steel sheets, and a method for producing a steel sheet. Hereinafter, the present invention will be described. In order to solve the above problems, the invention according to claim 1 provides a cooling device which is disposed on the lower side of the final rolling table of the hot rolling mill, and is provided to be capable of cooling the steel sheet to be conveyed on the conveying roller. A cooling device for a steel sheet of a plurality of cooling nozzles, wherein the cooling nozzle is disposed at a position on an upper surface side and a lower surface side of a steel sheet passing portion, and is capable of spraying cooling water toward a steel sheet passing portion, and has a uniform cooling width disposed in the cooling nozzle. For the position of the outer side of the steel sheet in the width direction, a rectifying means for draining and rectifying the cooling water sprayed by the cooling nozzle is performed. Here, the "uniform cooling width" of the cooling nozzle means the size of the steel sheet in the width direction in which the steel sheet to be conveyed is uniformly cooled in the nature of the arranged cooling nozzle group. Specifically, it is usually the same as the width of the largest steel sheet which can be manufactured by the steel plate manufacturing apparatus. In addition, "cooling water" means cooling water used as a cooling medium, and it does not have to be so-called pure water, and it may be water containing industrial impurities such as unavoidable impurities. The cooling device according to the invention of claim 1 is characterized in that the upper side is provided with an upper guide portion, and the rectifying means is a uniform width of the outer side of the steel sheet and the other One of the opposite members is opposite to the member, and the interval between the opposite ends is the narrowest, and the interval between the lower ends is wider than the upper end, and is disposed near the upper guiding portion, and the lower end is located at a position higher than the upper end. Here, "proximity" means that it is not necessary to be connected. The invention described in claim 3 is characterized in that the cooling device described in the first or second aspect of the invention is characterized in that the cooling water sprayed from the cooling nozzle is guided from the upper side to the upper surface of the upper guide portion. The invention described in claim 4, wherein the cooling device described in the first to third aspects is characterized in that the gas injection device that injects gas downward is provided. The cooling device according to the first aspect of the invention of the present invention is characterized in that, in the cooling device according to the first aspect of the invention, the drainage is branched into the upper and lower directions, and the opening for guiding the water to the upper portion is guided to the upper side in order to solve the problem. In the above-mentioned problem, the patent application Fan Yuanming provides a cooling device as described in any one of the hot rolling mill trains and the application of the fifth aspect of the application, and the patent application scope is disposed in the direction of the cooling nozzle in the passing portion of the steel sheet. In the configuration of one of the positions, the upper end of the upper end is arranged with the contact or the joint of the joint to the lower side, but the application is patented, and the rectifying means is at both ends of the width direction of the guard. The scope of application for patents is as follows: the means of rectification, which is the means of rectification of the patent application scope, has: divergent means, and has a means of drainage.发 丨 丨 丨 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 。 。 。 。 。 The invention described in claim 7 is the apparatus for manufacturing a hot-rolled steel sheet according to claim 6, wherein the final rolling stand of the hot rolling mill includes: a casing for holding the work roll The housing has a pair of standing portions including a portion of the upper guiding portion therebetween, and the standing portion is the aforementioned side wall. The invention described in claim 8 is characterized in that the hot-rolled steel sheet manufacturing apparatus of the hot rolling mill and the cooling device described in any one of the first to fifth aspects of the patent application are characterized in that A side wall is erected at a position further outward in the width direction of the steel sheet of the cooling device, and at least a part of the rectifying means of the cooling device is disposed to contact the side wall. The invention according to the ninth aspect of the invention is characterized in that the invention provides a hot-rolled steel sheet manufacturing apparatus of the hot rolling mill, and the cooling device according to any one of the first to fifth aspects of the patent application, characterized in that In order to position the cooling device at a position outside the width direction of the steel sheet, side walls are provided, and the rectifying means of the cooling device is disposed so as to have a gap with the side wall. In order to solve the above problems, the invention described in claim 10 provides a steel sheet for manufacturing a steel sheet by a steel sheet manufacturing apparatus according to any one of the sixth to ninth aspects of the patent application. Manufacturing method. In order to solve the problem, the invention of the invention of the first aspect of the invention provides a method for producing a steel sheet by using a hot-rolled steel sheet manufacturing apparatus according to any one of the sixth to ninth aspects of the invention. , -9-201114513 There are: a step of performing a dressing rolling process with a maximum pressure ratio under the final rolling stand in the hot rolling mill train, and a step of cooling by a cooling device. In order to solve the above problems, the invention described in claim 12 provides a method for producing a steel sheet by using a hot-rolled steel sheet manufacturing apparatus described in any one of the sixth to ninth aspects of the patent application. The manufacturing apparatus is provided with a pinch roller on the step side below the cooling device, and after the front end of the steel plate passes through the pinch roller, cooling is started by the cooling device. According to the present invention, it is possible to provide a cooling device having excellent drainage properties of a hot-rolled steel sheet manufacturing line, a manufacturing apparatus for hot-rolled steel sheets, and a method for producing a steel sheet. Further, by this, the amount of cooling water can be increased, so that quenching after rolling can be further promoted, and a steel sheet excellent in mechanical properties can be produced. [Embodiment] The above-described actions and gains of the present invention can be known from the following description for the purpose of carrying out the invention. Hereinafter, the description of the present invention will be made with reference to the embodiments shown in the drawings. However, the invention is not limited by the embodiments. Fig. 1 is a partial schematic view showing a manufacturing apparatus 10 for a hot-rolled steel sheet including the cooling device 20 of the first embodiment. In the first drawing, the steel sheet 1 is conveyed from the left side (upstream side, upper step side) to the right side (downstream side, lower step side) in the drawing, and the drawing is vertically oriented. The upstream side (upper step side) and the downstream side (lower step side) direction are described as the through-plate direction, and the plate width direction of the steel sheet passing therethrough in the direction perpendicular to the perpendicular direction is described as the width direction of the steel sheet. In addition, the description of the repeated symbols is omitted for the sake of simplicity of the drawing. - 201114513 As shown in Fig. 1, the hot-rolled steel sheet manufacturing apparatus 10 includes a hot rolling mill row 1 1 , a cooling device 20 , and a conveying roller 12 ' 12,. . . And the pinch roller 13. Further, the illustration and description are omitted. However, on the step side of the hot rolling mill train 1 1 , a heating furnace, a rough rolling mill train, and the like are disposed to trim the steel sheets entering the hot rolling mill row 1 1 . On the other hand, on the step side of the nip roller 13, the other cooling device, the coiler, and the like are disposed, and various devices for the purpose of shipping the steel sheet in a coil shape are disposed. The hot rolled steel sheet is roughly produced in the following manner. That is, a thick rod which is taken out from a heating furnace and rolled into a specific thickness by a rough rolling mill is continuously rolled into a specific thickness by the hot rolling mill train 1 1 while controlling the temperature. Thereafter, rapid cooling is performed in the cooling unit 2〇. Here, the cooling device 20 is placed at a final rolling stage of 1 1 g in the hot rolling mill train 1 1 in a manner very close to the rolling rolls 11 gw and 11 gw (see Fig. 2) of the final rolling table 11 g. Supports the inside of the housing of the rolling roller 1 1 gh. Next, it is cooled to a specific coiling temperature by the pinch roller 13 by other cooling means, and taken up in a coil shape by a coiler. In the following, the manufacturing apparatus 10 (hereinafter also referred to simply as "manufacturing apparatus 10") of the hot-rolled steel sheet will be described in detail, including the cooling device 20. Fig. 2 is an enlarged view of a portion including the cooling device 20 of Fig. 1. The second (a) is an enlarged view of the entire cooling device 2, and the second (b) is an enlarged view of the vicinity of the final rolling table 1 lg. Figure 3 is a perspective cross-sectional view of III-III of Figure 2 (a). Therefore, in Fig. 3, the vertical direction of the manufacturing apparatus 10 is on the lower surface of the drawing, and the left and right sides of the drawing are in the width direction of the steel sheet, and the far/near direction of the drawing is in the direction of the sheet. -11 - 201114513 The hot rolling mill train 1 of the present embodiment can be seen from Fig. 1, and seven light vehicle L machines (11a, lib, 11c, ..., llg) are arranged side by side in the direction of the through plate. Each of the rolling mills 1 1 a, 1 1 b, ..., 1 1 g is used to form a so-called rolling mill for each rolling stand to set the pressing rate and the like in accordance with the necessary thickness, mechanical properties, surface quality and the like of the final product. Rolling conditions. Here, the pressure ratio under each rolling stand is set in such a manner as to conform to the performance of the steel plate to be manufactured. However, 'rolling under high pressure causes the Worthfield iron particles to undergo large deformation and increase the transformation density to seek cooling. From the viewpoint of miniaturization of the ferrite particles, the pressure ratio under the final 1 Ig of the rolling mill should be large. The rolling mill of each rolling stand has: one pair of working steel plates 1 and a pair of pressing rolls (llaw, llaw, ..., llfw, llfw, llgw, llgw), and one pair of contacts to the outer edge of the work roll Wheel assist rollers (1 1 ab, 1 1 ab, ..., 1 1 fb, 1 1 fb, 1 1 gb, 1 1 gb ). In addition, the rolling mill has a casing (11 ah, ..., 11 fh, 11 gh) which has a work roll and a wheel-assisted roller on the inside to form a rolling mill casing and supports the rolling roller. » The casing has a relative standing The erecting unit (the final erecting unit 11 gr, 11 gr in Fig. 3 when the final rolling table is 1 g). In other words, the erected portion of the casing can be erected so as to sandwich the steel plate and the lower guide portion 40 in the width direction of the steel sheet. Here, the distance between the center of the work roll 1 lgW axis shown by L1 in the second figure (a) and the step side end surface of the housing erecting portion 1 1 gr and 1 1 gr is larger than the radius of the work roll 1 1 gw r 1. Therefore, at a portion corresponding to l 1 - r 1 , a portion of the cooling device 20 can be disposed as will be described later. That is, one portion of the cooling device 20 can be disposed in such a manner as to be inserted inside the casing 11gh. -12- 201114513 Further, as shown in Fig. 3, the cooling device 20 is inserted into the portion between the housing erecting portions 1 lgr and 1 lgr, and exists on the extension line of the width direction of the steel plate in the lower portion of the guiding portion 40 of the cooling device 20. As the housing erection used for the side wall: [lgr, 1 lgr. Next, a specific gap is formed between the end portion of the lower guide portion 40 in the width direction of the steel sheet and the housing standing portion 1 1 gr and 1 1 gr. Next, the cooling device 20 will be described. The cooling device 20 is provided with: upper water supply means 21, 21, . . . The lower water supply means 22, 22, ..., the upper guiding portions 30, 30, ..., the lower guiding portions 40, 40, ..., and the rectifying means 50, 50. The above water supply means 2 1, 2 1 , ·. . A means for supplying cooling water to the upper side of the steel sheet 1, comprising: being disposed in the cooling header 2 1 a, 2 1 a, . . And disposed in each of the cooling headers 21a, 21a,. . . The plurality of rows of conduits 21b, 21b, ..., and the cooling nozzles 21c, 2 1c, and 2c installed at the tips of the conduits 21b, 21b, ... are in the present embodiment, as can be seen from the second and third figures. The cooling header 2 1 a is a pipe extending in the width direction of the steel sheet, and the cooling headers 21a, 21a, . . Parallel to the direction of the board. The duct 2 1 b is a plurality of thin tubes which are branched from the respective cooling headers 2 1 a, and the open end faces the upper surface side of the steel sheet. The plurality of conduits 2 1 b, 2 1 b, ...' are arranged in a comb-tooth shape along the longitudinal direction of the cooling header 2 1 a, that is, in the width direction of the steel sheet. At the front ends of the respective conduits 21b, 21b, ..., cooling nozzles 21c, 2 1 c, are disposed. . . . The cooling nozzles 2 1 c, 2 1 c, ... of the present embodiment are flat-type 13-201114513 flat spray nozzles which can form a fan-shaped cooling water jet (for example, a thickness of about 5 m to 300 m). Fig. 4 and Fig. 5 are schematic views showing the formation of a cooling water jet on the surface of the steel sheet by the cooling nozzles 21c, 21c, .... Figure 4 is a transmission diagram. Figure 5 is a schematic diagram of the impact pattern of the jet impacting the surface of the steel sheet. In Fig. 5, white dots indicate cooling nozzles 21c, 21c, . . . Below the positive position, the thick line indicates the impact position and shape of the cooling water jet. In the fourth and fifth figures, the direction of the through-plate and the width direction of the steel sheet are also shown in Fig. 4 and Fig. 5. In the present embodiment, the adjacent nozzle rows are oriented in the width direction of the steel sheet. The position is shifted in the manner of the position, and the adjacent nozzle row is the same as the position in the width direction of the steel sheet, and is a so-called checkerboard arrangement. In the present embodiment, the cooling nozzles 21c, 21c, and the cooling nozzles are arranged at least twice in the width direction of the steel sheet surface of the steel sheet. . . That is, through a certain point ST of the steel plate, it moves along the straight arrow of Fig. 5. In this case, in the nozzle row A, the nozzle row A is secondary (Al, A2), the nozzle row B is secondary (B1, B2), and the nozzle row C is secondary (C1, C2), ... The jets from the cooling nozzles 2 1 c, 2 1 c, ... to which the nozzle row belongs are subjected to two impacts. Therefore, between the interval Pw of the cooling nozzles, the impact width L of the cooling water jet, and the torsion angle 々, the cooling nozzles 2 1 c, 2 1 c, should be arranged in such a manner that the relationship of L = 2Pw/cos β is established. .... Although it is passed twice, it is not limited thereto, and it may be configured by three or more times. In addition, in view of the uniformity of the cooling ability in the width direction of the steel sheet, in the direction of the through-plate, the adjacent nozzle rows should be twisted in opposite directions from each other in the direction of -14,145,145. Further, the arrangement of the cooling nozzles determines the cooling of the steel sheet. Related "uniform cooling width". The nature of the nozzle group in the arrangement represents the size of the width direction of the steel sheet to be uniformly cooled by the conveyed steel sheet. Specifically, the maximum steel sheet width that can be manufactured by the manufacturing apparatus of the 'normal' steel sheet is uniform. Specifically, for example, it is the size shown in Fig. 5R. Here, in the present embodiment, the adjacent nozzle rows as described above are described in the form of twisting the cooling nozzles in opposite directions. However, it is not necessarily limited to this, but it can also be a form of twisting all in the same direction. Further, the torsion angle (the above /5) is not particularly limited, and can be appropriately determined from the viewpoints of necessary cooling capacity and equipment arrangement state. Further, in the present embodiment, the nozzles adjacent to each other in the direction of the plate are arranged in a checkerboard arrangement from the viewpoint of the above-described advantages. However, it is not limited thereto, and it may be a state in which the cooling nozzles are juxtaposed on a straight line in the direction of the through plate. The position of the above water supply means 21 is provided, in particular, the cooling nozzles 2 1 c, 2 1 c, are disposed. . . There is no special restriction on the location. However, after the final rolling table of the hot rolling mill 1 1 is 1 g, the working roller 1 1 gw which is very close to the inner rolling table 1 1 g from the inner side of the final rolling table 1 1 gh. The way to configure. With this arrangement, the steel sheet 1 which has been rolled by the hot rolling mill train 1 1 can be quenched. Further, the front end portion of the steel sheet 1 can be stably induced to the cooling device 20. In the present embodiment, as is understood from Fig. 2, the cooling nozzles 21c, 21c, ... close to the work rolls 11gw are arranged close to the steel sheet 1. -15 - 201114513 Secondly, basically, from each cooling nozzle 2 1 c, 2 1 c,. . . The direction in which the cooling water sprayed from the cooling water jet is sprayed is in the vertical direction. However, the cooling nozzles 21c, 21c, which are the work rolls llgw closest to the final rolling table llg, are. . • The cooling water spray should be more inclined than the vertical direction of the work roll 1 1 gw. Thereby, the time from when the steel sheet 1 is pressed down to the final rolling stage of 1 g to the start of cooling can be further shortened, and the recovery time of the rolling deformation accumulated in the rolling can be made almost zero. Therefore, it is possible to manufacture a steel plate with a finer structure. The following water supply means 2 2, 2 2, ·. . It is a means for supplying cooling water to the lower side of the steel sheet 1. The following water supply means 22, 22 '. . . , with: set in the cold set. The flow tubes 22a, 22a, ... are arranged in the plurality of rows of conduits 22b, 22b, 22b, 22b, ... . . And cooling nozzles 22c, 22c, ... installed at the ends of the ducts 22b, 22b, .... The following water supply means 22, 22, ... are connected to the above water supply means 21, 21, . . . Although the direction in which the cooling water is sprayed is different from each other, it is substantially the same as the above-described water supply means 21, 21, ..., and the description thereof is omitted here. Next, the above-described guide portion 30 will be described. Fig. 6 is a view of the above guide portion 30. Fig. 6(a) is a partial cross-sectional view showing the upper guide portion 30 as viewed from above the cooling device 20. Figure 6(b) is a side view. Figure 6 shows the cooling nozzles 21c, 21c, at the same time. . . The position and position of the steel plate 1. The upper guide portion 30 includes a plate-shaped guide plate 31 and drain passage forming portions 35, 35 disposed on the upper surface side of the guide plate 31. . . . The guiding plate 3 1 is a plate-like member and is provided with inflow holes 3 2, 3 2, -16- 201114513 . . . And the outflow hole 3 3, 3 3, ·. . . The inflow holes 32, 32, ... are disposed corresponding to the cooling nozzles 21c, 2 1 c, . . . The position also corresponds to the shape of the jet. Therefore, the inflow holes 3, 3, 2, ... are arranged side by side in the width direction of the steel sheet to form the inflow hole row 32A, and the inflow hole rows 32A, 32A, ... are juxtaposed in the direction of the through plate. Here, the shape of the inflow hole is not particularly limited, and it may be formed so that the jet flow from the cooling nozzle does not hit the guide plate as much as possible. Specifically, it is of course also based on the jet flow characteristics of the cooling nozzles used, however, it should be that more than 10% of the amount of cooling water per unit time from one cooling nozzle 2 1 c does not impinge on the guide of the upper guide portion 30. The shape of the guide plate 31 is passed. Secondly, the inflow holes 32, 32 are arranged from the effective use of the limited space. . . From the point of view, the shape of the opening of the inflow hole should be similar to the cross-sectional shape of the cooling water jet (a section perpendicular to the axis of the ejection direction). On the other hand, the outflow holes 3 3, 3 3 '... are rectangular holes which are arranged in parallel in the width direction of the steel sheet to form the outflow hole row 3 3 A. By the flow of holes 3 3, 3 3,. . . A portion of the guide plate 3 is left between the portions to prevent the front end of the conveyed steel sheet 1 from protruding into the outflow holes 33, 33, . Therefore, it is a means for preventing the intrusion of steel sheets 3 3 s, 3 3 s, .... The outflow hole row 3 3 A, 3 3 A,. . . The system is disposed in the inflow hole array 32 A ' 32 A,. . . between. That is, the guide sheets 31 are alternately arranged with the inflow hole array 32A and the outflow hole array 33A along the direction of the through plate. Here, the outflow holes 3 3, 3 3, _. The good opening shape will be described by a parallel rectangle as described above. Thereby, a large opening area can be effectively obtained by using a limited space. However, it is not limited to this, as long as it can ensure the appropriate displacement of •17- 201114513, it can prevent the steel plate from getting stuck. That is, the shape of the outflow orifice is not limited to the above-described rectangular shape, and may be, for example, a circular shape. Next, the steel plate intrusion means is prevented from being in the shape of the opening. For example, the outflow hole has a trapezoidal shape having an upper bottom and a lower bottom in the direction of the through plate. The steel plate intrusion means may have a parallelogram shape inclined from the through plate direction. Fig. 7 is a diagram showing a modification of the outflow hole. In the example of the modification of Fig. 7, when the lead portion 30' is different, only the outflow hole 33' is different, and the other portions are the same as those of the above-mentioned upper portion 30. Therefore, the same reference numerals are used for the same portions. One of the outflow holes 3 3 ' of the upper guide portion 30' is formed in a long hole 33 A' of the plate width, and the mesh member 33B' is attached thereto. An outflow hole can also be formed. The so-called mesh fineness of the mesh member 33B' is a mesh of 5 mm x 5 mm or more from the viewpoint of less influence on cooling water and less likely to cause foreign matter such as dross to be clogged. In addition, the outflow holes 3 3, 3 3,. . . Among the edges, the backflow prevention sheets 3 3p, ... are arranged upward from the edge in the direction perpendicular to the direction of the vertical plate. The backflow prevention sheet 3 3 p, 3 3 p,. . . To prevent entry and exit, 3 3,. . . The water is again from the outflow hole 3 3, 3 3,. . . The counterflow prevention sheet 33p, 33p, is disposed by the counterflow to the original position. . . To ensure more drainage and improve drainage. In the present embodiment, the backflow prevention sheets 33p, 33p, . . . It is erected in a large line, however, it is also possible to set up a backflow prevention sheet with its lower end narrower than the upper end side. Thereby, it is possible to ensure a wide flow path opening or a ladder shape between the backflow prevention sheet and the upright sheets (35a, 35c) of the passage forming portion to be described later. The guide surface of the anti-shaped surface is omitted, and the flow should be made to the 3 3 p hole 33, and the drainage area can be leveled to -18 - 201114513. The drainage path forming portion 3 5, 3 5, ..., As can be seen from Fig. 6(b), there is a member having a concave cross section surrounded by the sheets 35a, 35b, and 35c and extending in the width direction of the steel sheet. The drain passage forming portion 35 is disposed such that the concave opening portion faces the upper side of the guide plate 3 1 toward the guide plate 31. At this time, the opening portion, that is, the portion including the upper surface of the guide plate 3 1 and the outflow hole array 33 A is covered between the sheet 35 5 a and the sheet 3 5 c. In addition, adjacent drainage passage forming portions 35, 35, . . There is a specific interval between the inflow hole columns 32A, 32A, . . . And cooling nozzles 21c, 2 1 c,. . . Configured between this interval. Further, among the sheets 35b opposed to the outflow hole array 33A, on the side of the outflow hole row 3 3 A, the commutator piece 36 is disposed directly above the outflow hole row 3 3 A . The shape of the flow regulating piece 36 is such that the drainage of the impact piece 35b is separated into a shape which is rectified toward the bottom surface of the drain passage in which the backflow prevention sheets 33p and 33p are disposed as described later. For example, inverted triangles, trapezoids, wedges, or other raised shapes can be considered. Here, the drainage passage forming portion 3 5 ' 3 5,. . . The height is not particularly limited, however, the above-mentioned water supply means 2 1 of the conduit 2 1 b, 2 1 b,. . . When the inner diameter is d, it should be in the range of 5d to 20d. It is because of the conduits 21b, 21b,. . . If it is larger than 20d, the pressure loss is large and not good, and if it is less than 5d, the ejection from the cooling nozzle may be unstable. The upper guide portion 30 as shown above is arranged in the manner shown in Fig. 2. In the present embodiment, three upper guide portions 30, 30, and 30 are used and arranged in the through-plate direction. Any of the upper guiding portions 30, 30, and 30 are configured to correspond to the position of the cold direction of the nozzles 2lc, 21c, ..., which corresponds to the position of the nozzles 2lc, 21c, ..., and is closest to the upper end of the final rolling table iig. The 1 1 g side end of the rolling table is lower and the other end side is higher. The other two upper guide portions 30, 30 are disposed so as to be substantially parallel to the through plate surface. With such an upper guide portion 30, the upper guide can solve the problem that the front end sound, 21c, ..., etc. are stuck when the front end portion of the steel plate passes. Next, by the upper guide portion 30, a large amount of cooling water on the upper side can be appropriately discharged. First, the cooling water supplied to the upper surface is cooled by the steel sheet, and then flows downward in the width direction of the sheet to discharge. However, when the volume 'flow density is large, it will not be able to fully drain the water. On the other hand, the upper guide portion 30 maintains the stagnant water in a thin state by the passage. Detailed Fig. 8 is an explanatory diagram thereof. In Fig. 8, in order to accommodate the symbol, the water density from the cooling nozzles 21c, 21c, ... can be applied to the steel plate in accordance with the weight density of the sixth drawing (b) and the cooling water supply amount in the width direction of the steel sheet. 1 The cooling water sprayed above, as shown in Figure 8, will move back and forth in the direction of the plate and impact. The direction in which this occurs is changed, and as shown by the arrow S, the upwardly facing holes 3 3, 3 3, ... impinge on the drain passage forming portion 3, and as described above, the sheet 35b is provided with a wedge-shaped arrangement. That is, the actual lead portion 30 is configured such that the basic machine β having the specific inter-lead portion 30 in the most inclined manner is supplied to the steel plate water means 2 1 , 2 1 and partially to the steel plate by the cooling nozzle 2 1 c The cooling water supplied is formed to form a thicker further forming drainage as shown below. Easy to understand, the number is omitted. High cooling water flow Drainage is not sufficient ® will also be strong. On the same day, when the heads R and R are also impacted, the cooling water moves and flows out of the 5 pieces of 3 5 b. At this time, the flow sheet 3 6, cooling water -20-201114513 performs direction conversion as indicated by arrows τ, T. At this time, the resistance by which the direction is switched is surely and effectively suppressed, and the cooling water reaching the upper side of the guide sheet 31 is moved in the far/near direction and drained. At this time, 'because the outflow holes 3 3 the backflow prevention sheets 33ρ, 33ρ' can suppress the cooling water from being again 33 ° as described above, and by further providing the drainage means 'that is, when supplying a large amount of cooling water having a high water density,' can also be suppressed . In addition, the water is divided into the water supply hole and the discharge hole of the cooling water and the structure is used to perform the drainage of the cooling water for cooling, and moves on the way. The situation of cooling water is suppressed. Thereby, the thickness of the retained water can be made thinner, and the cooling effect can be improved by smooth drainage and suppression of the retained water as described above, and the difference in cooling in the width direction of the sheet can be suppressed to be small. In this way, a quality steel plate can be used. The cooling is poor, and the width of the cooling water plate is within ±30 °C. Here, the flow out of one outflow hole row 33 A is contained. . . The width direction of the steel sheet disposed on the upper guide portion 30 is not limited to this. For example, such an outflow hole may be disposed only in the vicinity of the central portion in the width direction of the steel sheet in the thickness of the retained water. When the cooling water reaching the upper surface of the guide plate 3 1 is drained from both ends of the guide plate 31, it may be further increased. For example, as shown below. On the upper side of the guide plate 3 1, the fins 3 6 can be formed in a higher manner.边缘 The edge of the drawing is provided with a flow return hole to make the amount of water retained on the upper side. It is also possible to obtain the steel sheet with the average temperature difference which should be the hole 3 3, 3 3 , however, and the tendency of the steel plate width of the steel sheet to have a larger drainage width - 21 - 201114513 center and decrease toward the both ends in the width direction of the steel sheet The tilting method can also be configured. By the height difference, the drainage is easily moved to both ends of the guide plate 31, and the drainage can be more smoothly promoted. Further, a pump or the like may be provided to perform forced drainage or to form a negative pressure in the drain passage forming portion, and the cooling water may be easily introduced into the drain passage forming portion to further improve the drainage performance. Further, the upper guide portion itself may be formed to move in the up and down direction, and the upper guide portion 30 may be moved downward in a range that does not affect the through plate to pressurize the stagnant water, forcibly introduce the cooling water. The structure inside the drain passage forming portion. In addition, it is equipped with a guide. The inflow hole 3 3, 3 3, of the lead plate 3 1 . . . And both ends of the steel plate in the width direction, the edge portion (edge) may be chamfered or rounded (the edge is formed into an arc shape). Thereby, the steel plate that has passed through can be reduced, and the smooth flow of the cooling water can be promoted. The material of the guide sheet 31 can be a general material having the necessary strength and heat resistance for guiding, and is not particularly limited. However, in order to reduce the abrasion caused by the steel sheet 1 when the steel sheet 1 is in contact with the guide sheet 31, a material such as a resin which is softer than the steel sheet 1 may be used as the portion having no strength and heat resistance. Fig. 9 is a view corresponding to Fig. 6(b) among the upper guide portions 130, 130' of other forms. Fig. 9(a) is a top guide portion 130' of the upper guide portion 130'. Here, members common to the above-described upper guide portion 30 are also denoted by the same reference numerals, and description thereof will be omitted. In the case of the upper guide portion 130, the drain passage forming portions 135, 135, ..., -22-201114513 are formed in a form separated from the guide sheets 31. Therefore, when the drain passage forming portions 135, 135, ..., the sheets 35a, 35a, ... and the backflow preventing sheets 33p, 33p, ... are the bottom plates 135d, 135d, . . . The connection sheets 35c, 35c, ... and the backflow prevention sheets 3 3 p, 3 3 p, The bottom of the drainage path is formed by connecting the floor 丨 3 5 e, 丨 3 5 e, . The upper guide portion 130 may be used. The upper guide portion 130' is a reverse flow preventing piece 133p', ι33ρ', ... extending over the upper surface of the guide plate 3 1". FIG. 10 is another form. The upper guide portions 230 and 230' correspond to the sixth diagram (b). The first (a) figure is the upper guiding portion 23 0, and the tenth (b) is the upper guiding portion 230'. Here, members common to the above-described upper guide portions 30 and 130 are also denoted by the same reference numerals, and the description thereof will be omitted. When the upper portion 230 is guided, the drainage passage forming portion 23 5, 23 5,. . . It is formed in a form separated from the guide sheets 31. Therefore, when the drain passage forming portions 235, 235, ..., the sheets 35a, 35a, ... and the backflow preventing sheets 233p, 233p, . . The bottom plates 235d, 235d, ... are connected by the bottom plates 235d, 235d, ..., and the backflow prevention sheets 233p, 233p, ... are connected by the bottom plates 235e, 235e, ..., and the bottom plate 2 3 5 d, 2 3 5 d , . . And the bottom plate 2 3 5 e, 23 5 e,. . . To form the bottom of the drainage path. In addition, the backflow prevention sheet 23 3 p , 2 3 3 p,. . . It extends further to the upper side of the guide plate 31. The upper guide portion 230 is between the guide plate 31 and the drain passage forming portion 2 3 5, 2 3 5, ..., in addition to the cooling nozzles 21c, 21c, ..., also includes the headers 21a, 21a, . . And the tubes 21b, 21b, .... Such an upper guide portion 230 can also be employed. -23- 201114513 When the upper guide portion 230' is used, the adjacent drain passage forming portions 235, 23 5 are used as the one drain passage forming portion 23 5' in the upper guide portion 230'. Thereby, the drainage path indicated by Τ' in Fig. 10(b) can also be ensured. Take this. It is possible to increase the cross-sectional area of the flow path of the drainage path (τ ') by more than the above description of the guide portion of the example. However, the upper guide portion is not necessarily limited to this. The upper guide. Next, the following guide portion 40 will be described. The lower guide portion 40 is a plate-like member disposed between the lower water supply means 22 and the steel sheet 1 to be conveyed. Thereby, in particular, when the steel sheet 1 is passed through the manufacturing apparatus, it is possible to prevent the front end of the steel sheet 1 from being subjected to the lower water supply means 22, 22, ... and the carrying rollers 12, 12, . . Stuck. On the other hand, in the lower guide portion 4'', an inflow hole through which the jet flow from the lower water supply means 22 passes is disposed. Thereby, the jet from the lower water supply means 22 can pass through the lower guide portion 40 to reach the lower surface of the steel sheet for moderate cooling. The shape of the lower guide portion 40 used herein is not particularly limited, and a well-known lower guide portion can be used. Such a lower guide portion 40' is disposed as shown in Fig. 2. In the present embodiment, four lower guide portions 40, 40, ... are used to be disposed between the conveyance rollers 12, 12, and 12, respectively. Any of the lower guide portions 40, 40, ... is disposed at a slightly lower height than the upper ends of the conveyance rollers 12, 12, ..., but not so high. In the present embodiment, an example in which the lower guide portion is provided will be described. However, the lower guide portion is not necessarily provided. -24 - 201114513 The rectifying means 5 0, 5 〇 is a plate-shaped pair of members having an arcuate cross section as shown in Fig. 3(a) and extending in the direction of the plate. Such rectifying means 5 〇 , 50 have a convex side surface having an arcuate cross section facing upward. That is, a pair of opposite rectifying means 50, 50 is formed such that the interval between the upper end portions thereof is narrow, and at least the interval between the lower end portions is wider than the upper end portion. In the form of Fig. 3(a), the upper end portion is disposed in contact with or close to the upper guide portion 30. On the other hand, the lower end portion is in contact with the housing standing portion 1 1 gr and 1 1 gr. Further, the arrangement positions of the rectifying means 50 and 50 are as follows. That is, a gap is formed between the housing uprights 1 1 gr, 1 lgr and the end of the upper guide portion 30 in the width direction of the steel sheet. The rectifying means 50, 50 are disposed between the formed gaps corresponding to the position between the upper guiding portion 30 and the lower guiding portion 40 in the vertical direction. Therefore, it is disposed at a position as shown below, that is, the cooling water supplied to the upper surface of the steel sheet can be rectified when it is divided into the width direction of the steel sheet as shown by arrows D and D in FIG. s position. When the rectifying means is not provided, the water flowing in the width direction of the steel sheet plate hits the housing standing portion and moves up and down in the vertical direction. This fierce transformation is a factor in flow resistance. Further, among the water moving up and down, respectively, the upward water eventually moves downward due to gravity, and merges with the downward moving water. Therefore, there will also be flow resistance. The above-mentioned flow resistance becomes a flow resistance of the entire drainage water of the cooling water, and is one of the causes of hindering smooth drainage. In particular, when the amount of cooling water is increased in order to increase the cooling capacity, this phenomenon is more remarkable, and thus moderate cooling is sometimes obtained. In addition, -25- 201114513, part of the drainage that impacts the side wall and moves upward reaches the upper guide portion, which may form stagnant water, which is one of the reasons why the front end of the cooling nozzle is flooded. On the other hand, by providing the rectifying means 50 and 50, the direction in which the cooling water is directed downward can be smoothly performed and guided to the draining direction. Therefore, even if the amount of cooling water is increased, the flow resistance can be suppressed from becoming large, and the drainage property can be improved. Secondly, it is possible to maintain a high cooling capacity and to manufacture a steel sheet having excellent mechanical properties. In the present embodiment, the rectifying means 50 and 50 are described as being circular in cross section. However, the rectifying means 50 and 50 are not necessarily arcuate, and as described above, other shapes may be used as long as the direction of drainage can be smoothly converted. For example, it may be a non-arc curve, a slanted line, or a combination of straight lines. Further, the third (b) diagram is a modification. In the example of Fig. 3(b), the lower ends of the rectifying means 50', 50' are arranged to have a specific gap between the casing standing portions 11 gr and 11 gr. By arranging such a gap 'water that should be excluded from the upper guide portion 30' is indicated by arrows D', D' by the drainage ejector effect shown by arrows D, D Inhale and flow to promote smooth drainage. As described above, the water existing on the upper surface of the upper guide portion 30, for example, the water flowing through the drainage path forming portion 35 of the upper guiding portion 3, and the inflow hole from the upper guiding portion 30 are countercurrent to water. Returning to Fig. 2, the manufacturing apparatus 10 for hot rolled steel sheets will be described. The carrying roller 1 2, 1 2, ... is a table for the steel plate 1 and is used to convey the roller of the steel plate 1 in the direction of the sheet. As described above, between the carrying rollers 12, 12 -26- 201114513, ..., the lower guiding portions 40, 40, ... are disposed. The pinch roller 13 has a water discharge function and is disposed on the step side below the cooling device 20. Thereby, it is possible to prevent the cooling water sprayed in the cooling device 20 from flowing out to the step side below the steel sheet 1. Next, the fluctuation of the steel sheet 1 of the cooling device 20 can be suppressed, and in particular, the plate-like property of the steel sheet 1 before the front end of the steel sheet 1 is bitten by the winder can be improved. Here, the upper side roller 13a among the rollers of the pinch roller 13 can be moved up and down as shown in Fig. 1. With the above-described apparatus for producing a hot-rolled steel sheet, for example, the production of a steel sheet can be carried out in the following manner. That is, the cooling water spray of the cooling device 20 is stopped from the non-rolling time until the steel sheet is taken up by the coiler until the next steel sheet rolling is started. Next, the step side side of the cooling device 20 pinchs the roller 13 to move the upper roller 13a to a position higher than the upper guide portion 30 of the cooling device 20 during the non-rolling time, and thereafter, starts the next time. Steel plate rolling. When the front end of the next steel plate reaches the nip roller 13, it is cooled by the cooling water jet. Further, the front end of the steel sheet 1 is lowered by the nip roller 13 and the upper roller 13a is lowered to start the nip of the steel sheet 1. The cooling water spray is started before the front end of the steel sheet 1 is carried into the cooling device 20, and the length of the unstable cooling portion at the front end of the steel sheet can be shortened. Secondly, by spraying the cooling water, the sheet properties of the steel sheet 1 can be stabilized. That is, when the steel sheet 1 floats and approaches the upper guide portion 30, the steel sheet 1 is cooled from the nozzles 21c, 2 1 c, . . . The impact of the jet of the cooled cooling water is increased, and the downward force of the vertical direction of the steel sheet 1 is generated. Therefore, even when the steel sheet 1 hits the upper guide portion 30, the impact force received from the jet of the cooling water can alleviate the punching force, and the friction between the steel sheet 1 and the upper guide portion 3-27-201114513 can be reduced. Heat, so reduce the scratches that occur on the surface of the steel plate. Therefore, the hot-rolled steel sheet is manufactured by the apparatus 10 for manufacturing a hot-rolled steel sheet having the cooling device 20 having such a operation on the lower side of the hot rolling mill row 11, and can be cooled using a high-density, large amount of cooling water. In other words, by manufacturing a hot-rolled steel sheet by such a manufacturing method, it is possible to produce a hot-rolled steel sheet having a fine structure. Further, the plate speed of the hot rolling mill train 11 may be constant in addition to the beginning portion of the through plate. Thereby, a steel sheet having a higher mechanical strength for the entire length of the steel sheet can be produced. When the cooling water is drained as described above, specifically, the drainage performance can be appropriately determined depending on the necessary heat of cooling of the steel sheet, and is not particularly limited. However, as described above, from the viewpoint of miniaturization of the steel sheet structure, the quenching after the rolling is effective, and therefore, the cooling water having a high flow density should be supplied. Therefore, the drainage can be ensured as long as it can ensure the drainage performance corresponding to the supply amount and flow density of the cooling water. From the viewpoint of the above-described steel sheet miniaturization, the flow density of the supplied cooling water may be 10 to 25 m 3 / (m 2 · min ) » or may be a larger flow density. Fig. 11 is an explanatory view showing a manufacturing apparatus 110 for a hot-rolled steel sheet including the cooling device 120 of the second embodiment, which corresponds to the third drawing of the manufacturing apparatus 10. When the manufacturing apparatus of the hot-rolled steel sheet is Π0, the rectifying means 150 of the cooling device 120 is different from the rectifying means 50 of the cooling device 20. Since the other configuration is shared with the manufacturing apparatus 10, the description thereof is omitted here, and the symbols are also shared. The rectifying means 1 50, 150 are injection means for ejecting the gas shown in Fig. 11. Such a rectifying means 150, 150, the injection port should face downward -28-201114513 and be disposed between the housing erecting portions 11gr, 1 lgr and the end of the upper guiding portion 30, that is, the steel plate The flow of the cooling water supplied above is indicated by the arrows E and E in Fig. 3, and the gas can be injected from above to carry out the subsidized position. Thereby, it is possible to forcibly move the cooling water downward and guide it to the draining direction. Therefore, increasing the amount of cooling water can also suppress the increase in flow resistance, and can improve the drainage. Secondly, it maintains high cooling capacity and can produce steel sheets with excellent mechanical properties. Here, the embodiment of the rectifying means 1 5 〇 and 150 is used alone, but the present invention is not limited thereto. The rectifying means 50 and 50 of the first embodiment described above may be used in combination. Thereby, the drainage performance can be further improved. Fig. 12 is an explanatory view showing the manufacturing apparatuses 210 and 210' of the hot-rolled steel sheets according to the cooling apparatuses 220 and 220 of the third embodiment, and corresponds to the third drawing of the manufacturing apparatus 10. Fig. 12(a) is a manufacturing apparatus 210, and Fig. 12(b) is a manufacturing apparatus 210'. In the case of the hot-rolled steel sheet manufacturing apparatus 210, 210', the rectifying means 25A, 250' of the cooling means 22A, 220' are different from the rectifying means 50 of the cooling means 20. The other configuration is shared with the manufacturing apparatus 1A, and thus the description thereof is omitted here, and the symbols are also shared. The rectifying means 2 50 and 25 0 are arranged so as to close the upper guide portion 30 and the casing standing portions 11gr and 11gr as shown in Fig. 1 2 ( a ). On the other hand, the "rectifying means 2 5" and 250' are disposed so as to extend upward from both ends in the width direction of the upper guiding portion 30. Thereby, the drains shown by the arrows F, F, F', and F' impinge on the housing uprights 1 1 gr, 1 1 gr, even if a part thereof moves upward to enter the upper guide -29-201114513 section 30 It can also prevent staying. However, at this time, the drain passage forming portion of the upper guide portion 30 and the drain passage for the cooling water that reaches the upper surface of the upper guide portion 30 from the inflow hole are secured. Fig. 13 is an explanatory view showing a manufacturing apparatus 310 for a hot-rolled steel sheet including the cooling device 320 of the fourth embodiment, which corresponds to the third drawing of the manufacturing apparatus 10. The apparatus for manufacturing a hot-rolled steel sheet 310, the rectifying means of the cooling device 320 is different from the rectifying means 50 of the cooling device 20. Since the other configuration is shared with the manufacturing apparatus 10, the description thereof is omitted here, and the symbols are also shared. The rectifying means 350, 350, as shown in Fig. 13, are provided with the flow dividing means 360, 360 and the drainage means 370, 370. The flow dividing means 360, 3 60 are rectangular members having a wedge-shaped cross section, and have a wedge-shaped cross section as shown in Fig. 3 and extend in the direction of the through plate. The flow dividing means 3 60, 3 60 should be disposed on the casing standing portions 11 gr and 11 gi · faces which are impacted when the cooling water supplied to the upper surface of the steel plate moves in the width direction of the steel plate. The drainage means 370, 370 are members which are arranged such that the longitudinal direction of the tubular member is the plate direction. Further, in one portion of the pipe wall, as can be seen from Fig. 3, the opening portions Η and Η are provided. The drainage means 3 70, 3 70 are disposed between the end of the upper guide portion 30 and the housing upright portions 11gr, 1 1 g r. According to the rectifying means 3 5 0, 3 50, the cooling water supplied to the upper surface of the steel sheet flows toward both sides in the width direction of the steel sheet to be drained. Next, the drainage utilizes the wedge-shaped effect of the flow dividing means 3 60, 3 60 to suppress the flow resistance and to flow upward and downward, respectively. The drainage to the lower side is performed by draining -30-201114513 shown in Fig. 3G and G. On the other hand, the drainage which moves upward by the flow dividing means 3 60 and 3 60 performs the flow shown by FIG. 13 G' and G', and enters the inside of the pipe from the opening of the drainage means 370, 3 70 . The drainage entering the pipe moves in the direction of the length of the pipe and is properly drained from other parts. Therefore, the water flowing in the width direction of the steel sheet can be suppressed by the flow dividing means 3 60, 3 60 and moved downward in the vertical direction, respectively. Further, among the waters that move up and down, the upward water does not return to the lower side due to gravity, but is drained and drained by the drainage means 307, 307. Therefore, it is possible to prevent the water moving upward from moving again downward to generate flow resistance. Thereby, the flow resistance at the time of drainage can be suppressed, and the drainage property can be improved. Secondly, it is possible to maintain a high cooling capacity, and it is possible to manufacture a steel sheet having excellent mechanical properties. In the above embodiments, the side wall existing on the outer side of the cooling device is described by taking the erecting portion of the final rolling stand as an example. However, the side wall is The invention is not limited to this, and may be a side wall of the other device that is generated in a configuration relationship with other devices. [Examples] Hereinafter, the present invention will be further described in detail based on the examples. However, the invention is not limited to the embodiments. For the example, for the 3 (a) figure (No. 1), Figure 12 (a) (N 〇 . 2), and Figure 1 3 (N 〇 . 3) The drainage of the example shown is investigated. In addition, it is also directed to an example in which no rectification means is available (Comparative Example, No. 4) Enter the same survey as -31 - 201114513. Here, the width of the steel sheet having a length equal to the uniform cooling width is 1. 6m, the distance between the end of the uniform cooling width direction of the steel plate and the riser of the casing is 〇. 2m and 0. 2 kinds of 4m. In addition, the flow density of the cooling water is 20 (m3/(m2 · min)). The evaluation of the drainage is judged by whether or not the cooling nozzle is flooded. When it is flooded, it is "X". When the cooling nozzle is not flooded, the so-called half is "△" when it is flooded. Also. When there is a small amount of cooling water remaining on the upper guide portion, the cooling nozzle is "〇" when it is not flooded, and "◎" is not found when the cooling water is trapped on the upper guide portion. The results are shown in Table 1. [Table 1] The distance between the end portion of the steel plate width direction and the housing standing portion 0. 2m 0. 4m No. 1 ◎ ◎ No. 2 〇 〇 No. 3 ◎ ◎ No. 4 X Δ can be known from Table 1, No. In the case of the comparative example of 4, the evaluation is X or Δ. In particular, the distance between the end portion of the uniform cooling width direction of the steel sheet and the housing erect portion is 0. At 2 m, the front end of the cooling nozzle was flooded. In contrast, Ν〇·1 ~ No. In the example shown in Figure 3, the front end of the cooling nozzle is not flooded, and it is confirmed that it can be drained smoothly. The above is a description of the present invention in a preferred embodiment of the present invention. However, the present invention is not limited to the embodiment shown in the specification of the present application, and does not contradict the scope and description of the patent application. 32- 201114513 The scope of the invention or the scope of the idea read by the book as a whole can be changed moderately, and the cooling device of the hot-rolled steel sheet, the manufacturing device of the hot-rolled steel sheet, and the method of manufacturing the hot-rolled steel sheet produced by the change It is also included in the technical scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial schematic view showing a manufacturing apparatus of a hot-rolled steel sheet including a cooling device according to a first embodiment. Fig. 2 is a partially enlarged view of the cooling device of Fig. 1; Figure 3 (a) of Figure 3 is a perspective view of Section III-III of Figure 2 (a). Figure 3 (b) is a diagram of a variant. Fig. 4 is an explanatory view of a cooling nozzle. Figure 5 is another explanatory view of the cooling nozzle. Fig. 6 is an explanatory view of the upper guide portion. Fig. 7 is a view showing another example of the above-described guide portion outflow hole. Fig. 8 is an explanatory view showing the flow of cooling water of the upper guide portion. Fig. 9 is a view showing another example of the upper guide portion. Fig. 10 is a view showing another example of the above-described guide portion. Fig. 1 is an explanatory view of a cooling device of a second embodiment. Fig. 2 is an explanatory view of a cooling device according to a third embodiment. Fig. 13 is an explanatory view of a cooling device of a fourth embodiment. [Description of main component symbols] 1 : Steel plate-33- 201114513 10, 110, 210, 210', 310: Manufacturing equipment 1 1 : Rolling mill train 1 1 g : Final rolling mill 1 lgh : Housing llgr : (housing) Erection section (side wall) 12: conveying roller 1 3 : nip roller 20, 120, 220, 2205 > 320: cooling device 2 1 : upper water supply means 2 1 a : cooling header 21b: conduit 2 1 c : Cooling nozzle 22: lower water supply means 22a: cooling header 22b: duct 2 2 c: cooling nozzles 30, 30, 130, 130', 230, 2 3 05: upper guide 40: lower guide 50, 150 , 250, 2505, 350: rectification means -34-