200936263 九、發明說明 【發明所屬之技術領域】 本發明係關於雙輥鑄造機用的冷卻輥清掃裝置。 【先前技術】 作爲從熔融金屬直接生產出板帶（strip )的方法’有 一種雙輥連續鑄造法，是在水平排列的一對輥間供應熔融 φ 金屬，並將凝固後的金屬呈薄帶狀送出。 第1圖及第2圖係顯示裝設有習知冷卻輥清掃裝置一 例的雙輥鑄造機，其具備：水平排列的一對的冷卻輥1、 附設於該冷卻輥1的一對的側堤2。 冷卻輥1，是在內部流通冷卻水，並按照要生產的鋼 板帶3的板厚來擴大縮小輥間隙G。 冷卻輥1的轉動方向及速度是設定成，使各冷卻輥1 的外周面從上側朝向輥間隙G以等速移動。 Φ 一方的側堤2是和各冷卻輥1的一端形成面接觸，另 一方的側堤2是和各冷卻輥1的另一端形成面接觸。 在一對的側堤2之間，熔融金屬供應噴嘴4是配置於 輥間隙G的正上方，從澆斗（ladle，未圖示）朝熔融金屬 供應噴嘴4投入熔融金屬，將熔融金屬供應至四周被冷卻 輥1和側堤2包圍的空間而形成熔融金屬池5。 亦即，在形成上述熔融金屬池5的同時，若使藉由流 通冷卻水來進行散熱的冷卻輥1轉動，熔融金屬會在冷卻 輥1的外周面凝固，形成於各冷卻輥1的外周面的凝固殻 -5- 200936263 6互相貼合，而朝輥間隙G的下方送出鋼板帶3。 這時，爲了使鋼板帶3的板厚成爲目標値，係對樞支 著各冷卻輥1的頸部之軸箱（未圖示），朝讓其互相接近 的方向賦予緊壓力。 隨著作業時間的累積，在冷卻輥1的外周面會附著包 含錳和矽等的氧化物，若該等氧化物附著層的厚度增加， 會妨礙熔融金屬朝向冷卻輥1的熱傳導，而阻礙冷卻輥1 0 的外周面上之凝固殼6的生成。 於是，以往採用的手法，是在各冷卻輥1配置：遍及 其外周面軸線方向全長而進行抵接的圓柱狀的刷子7，藉 由馬達（未圖示）使該刷子7朝與冷卻輥1相同方向旋轉 ，以實施冷卻輥1的外周面的硏磨清掃，而除去氧化物附 著層（例如參照專利文獻1、2 )。 各刷子7之不是與冷卻輥1相對向的部位，是分別藉 由整流罩（cowling) 8來覆蓋。 〇 再者，在各整流罩8，是將沿冷卻輥1的軸線方向排 列的複數個粉塵吸引口 9呈對稱設置，粉塵吸引口 9是連 接至排氣鼓風機1〇,以防止伴隨著硏磨清掃所發生的粉塵 飛散。 專利文獻1:日本特開平8-309488號公報 專利文獻2:日本特開200 0-644號公報 【發明內容】 刷子7，是在胴部11的外周面整個植設硏磨清掃用的 -6 - 200936263 絞線群12，落入呈高密度植設的絞線群12中的粉塵’並 不容易往整流罩8外部吸引出。 關於對.冷卻輥1的外周面在軸線方向全長進行硏磨清 掃的刷子7的清淨度’在粉塵吸引口 9附近的範圍α ’雖 然不太會發生殘留於絞線（構成刷子7)和胴部的粉塵’ 但離粉塵吸引口 9越遠，殘留於絞線（構成刷子7)和胴 部的粉塵量越多。 φ 此刷子7的清淨度會反映至冷卻輥1，在遠離該刷子 7的粉塵吸引口 9的部位上多量殘留的粉塵的一部分，會 轉移至冷卻輥1的外周面，而妨礙熔融金屬朝向冷卻輥1 的熱傳導。 亦即，在冷卻輥1的外周面，在刷子7的粉塵吸引口 9附近的範圍α所抵接的部位雖然凝固殼6的生成可順利 進展，但在其他部位，由於粉塵會妨礙熱傳導，而導致凝 固殼6的生成無法順利進展。 〇 因此，一對的冷卻輥1所送出的鋼板帶3，如第2圖 所示，在凝固殼6的生成順利進展的山部分會成爲互相貼 合的狀態，但在沿冷卻輥1的軸線方向排列之山部分之間 的谷部分，會發生未凝固區域。 再者，因凝固而收縮後的鋼板帶3，其板寬方向的厚 度分布變得不均一，而可能發生裂開。 本發明是有鑑於上述實情而開發完成者，其目的是爲 了提供一種可確保刷子的高清淨度之冷卻輥清掃裝置。 爲了達成上述目的，本發明之冷卻輥清掃裝置，係具 200936263 備刷子；該刷子具有：穿設有多數個吸引孔（從外周面往 內部貫穿）且相對於冷卻輥軸線平行延伸之可自轉的筒狀 胴部、植設於該胴部的外周面且藉由胴部的旋轉而使前端 抵接於冷卻輥外周面之硏磨清掃用的絞線群、以及設置於 前述胴部的一端且連通於胴部內的空間之粉塵吸引口；而 且在前述粉塵吸引口連接排氣機構。 具體而言，將硏磨清掃用的絞線群植設成，在胴部的 Φ 外周面而從胴部一端朝向另一端形成螺旋狀的列。 或是，將硏磨清掃用的絞線群植設成，在胴部的外周 面形成複數條的從胴部一端朝向另一端的列。 再者，逐列將絞線群的毛長、線徑、或是材質予以改 變的構造，以及將刷子之不是與冷卻輥相對向的部位用整 流罩覆蓋的構造，也是能選擇的。 依據本發明的冷卻輥清掃裝置，可獲得下述優異的效 果。 φ (1)由於在外周面植設絞線之胴部穿設有多數個吸 引孔，硏磨清掃所產生的粉塵會從吸引孔進入胴部內的空 間而經由粉塵吸引口排出，因此可確保刷子的高清淨度。 (2)藉由採用：在胴部的外周面將絞線群植設成從 胴部一端朝向另一端形成螺旋狀的列的構造，或是在胴部 的外周面，將絞線群植設成形成複數條的從胴部一端朝向 另一端的列的構造，多數根絞線同時抵接於冷卻輥外周面 的範圍縮窄，即使不用力將刷子緊壓於冷卻輥，仍能確保 絞線群對冷卻輥的接觸面壓，以從冷卻輥外周面將氧化物 -8- 200936263 附著物確實地除去。 (3)因此’冷卻輥所送出的板帶之板寬方向厚度分 布會呈現平均化的傾向，而能避免發生裂開。 【實施方式】 以下，根據圖式來說明本發明的實施形態。 第3圖、第4圖係顯示裝設有本發明的冷卻輥清掃裝 0 置—例的雙輥鑄造機，圖中，和第1圖、第2圖賦予相同 符號的部分是代表相同的構件。 該冷卻輥清掃裝置所採用的手法，是藉由馬達9(未 圖示）使配置於各冷卻輥1的刷子13朝與冷卻輥丨相同 方向旋轉而實施冷卻輥1外周面的硏磨清掃，藉此除去氧 化物附著層。 刷子13係具有：穿設有多數個吸引孔（從外周面往 內部貫穿）14之筒狀的胴部15、在該胴部15的外周面植 φ 設成從胴部15 —端朝向另一端形成螺旋狀的列之硏磨清 掃用的絞線群16、透過環狀板17(嵌合於前述胴部15的 一端）而在胴部15組裝成同軸之中空軸狀的粉塵吸引口 18、以及透過板件（嵌合於前述胴部15的另一端，未圖 示）而在胴部15組裝成同軸之支承軸19;刷子13是配置 成與冷卻輥1的軸線平行，且藉由胴部15的旋轉而使絞 線群16的前端依序抵接於冷卻輥1的外周面。 上述「…植設成形成螺旋狀的列之硏磨清掃用的絞線 群16」的敘述是包含：在穿設於胴部15之植入用的孔植 -9- 200936263 入既定根數的絞線的束的手法，或是，在胴部1 5安裝溝 槽刷（channel brush，以具有既定厚度的方式用長形保持 具來拘束絞線群）的手法。 在各刷子1 3之不是與冷卻輥1相對向的部位，是分 別被整流罩20所覆蓋。 在連通於胴部15內的空間之中空軸狀的粉塵吸引口 18，透過旋轉接頭（用來容許刷子13進行旋轉，未圖示 φ )及配管2 1，而連接著作爲進行強制排氣的排氣機構之排 氣鼓風機10，以防止硏磨清掃所產生的粉塵飛散。 在進行雙輥鑄造機的作業時，藉由馬達（未圖示）使 刷子13朝向與冷卻輥1相同方向旋轉而進行冷卻輥1外 周面的清掃，以除去氧化物附著層，並使排氣鼓風機10 動作而捕集各整流罩20內部的粉塵。 在胴部15的外周面，由於將絞線群16植設成從胴部 15的一端朝向另一端形成螺旋狀的列，絞線群16同時抵 〇 接於冷卻輥1外周面的範圍縮窄，冷卻輥1外周面的寬度 方向輪廓不會對刷子1 3造成直接的影響，即使不特別用 力將刷子13緊壓於冷卻輥1，仍能確保絞線群16對冷卻 輥1的接觸面壓，而能從冷卻輥1的外周面確實地除去氧 化物的附著層。此外，由於可減少刷子13的緊壓力，而 能謀求：用來將刷子13緊壓於冷卻輥1的機構（推壓汽 缸等）的小型化、讓刷子1 3旋轉的機構所必要的驅動能 量的減少等。 而且，硏磨清掃所產生的粉塵，會從多數個吸引孔14 -10- 200936263 進入胴部15內的空間’並經由粉塵吸引口 18而往整流罩 20的外部直接排出，且絞線群16的植設密度低’粉麈很 難進入該絞線群1 6 ’而能確保刷子1 3的高清淨度。亦即 ，即使粉塵進入絞線群Ϊ6內或是附著於胴體15的表面’ 藉由吸引孔14可迅速且確實地吸引粉塵而從胴部15排出 。再者，藉由整流罩20來覆蓋刷子13，因此可適當地防 止粉塵飛散至刷子13的周圍。另外，容易使刷子13的附 0 近（整流罩20的內側）相對於周圍（整流罩20的外側） 形成負壓，而藉由排氣鼓風機10的動作可高效率地進行 粉塵的回收。 如此，在冷卻輥1外周面可順利進行凝固殼6 (參照 第2圖）的生成，使冷卻輥1所送出的鋼板帶3的板厚方 向厚度分布呈現平均化的傾向，而能避免發生裂開。 第5圖係顯示刷子13的變形例，除了絞線群所構 成的螺旋狀列以外’在胴部15的外周面以從胴部15的一 G 端朝向另一端形成螺旋狀列的方式植設硏磨清掃用的絞線 群22，如此形成二條的螺旋狀列。 絞線群16、22’可採用同一種來獲得—致的硏磨清掃 效果，也能逐列將絞線群16、22的毛長（從胴部15的外 周面至絞線前端的長度）、線徑、材質等予以改變，來獲 得不同的硏磨清掃效果。 第6圖係顯示刷子1 3的其他變形例，是以在胴部i 6 外周面形成複數條的從胴部15 —端朝向另—端的列的方 式’將硏磨清掃用的絞線群23在胴部15的周方向隔著等 -11 - 200936263 間隔進行植設。 各絞線群23，是相對於胴部1 5的軸線形成傾斜延伸 ，在胴部15的一端和另一端，植設位置是在胴部16周方 向的不同位置，因此絞線群23同時抵接於冷卻輥1 (參照 第3圖）的外周面的範圍縮窄，冷卻輥1外周面的寬度方 向輪廓不會對刷子13造成直接的影響，即使不特別用力 將刷子13緊壓於冷卻輥1，仍能確保絞線群23對冷卻輥 φ 1的接觸面壓，而能從冷卻輥1的外周面確實地除去氧化 物的附著層。 而且，硏磨清掃所產生的粉塵，會從多數個吸引孔14 進入胴部1 5內的空間，並經由粉塵吸引口 1 8而往整流罩 20 (參照第3圖）的外部直接排出，且絞線群23的植設 密度低，粉塵很難進入該絞線群23，而能確保刷子1 3的 高清淨度。亦即，即使粉塵進入絞線群23內或是附著於 胴體15的表面，藉由吸引孔14可迅速且確實地吸引粉塵 〇 而從胴部1 5排出。 另外，在以上的實施例，用來吸引粉塵的吸引孔僅設 置在胴部15，但在整流罩20也設置吸引孔亦可。亦即， 刷子1 3附近的粉塵，可藉由胴部1 5的吸引孔來進行吸引 ，也能藉由整流罩20的吸引孔來進行吸引，如此，可更 確實地進行粉塵的補集。絞線群16、22的列之捲繞方向 ，可以是向右扭轉，也可以是向左扭轉。刷子13本身的 旋轉方向並沒有特別的限定。 再者，本發明的冷卻輥清掃裝置，並非僅侷限於上述 -12- 200936263 實施例，當然能在不脫離本發明要旨的範圍內做任意的變 更。 本發明的冷卻輥清掃裝置’也能適用於使用鋼以外的 金屬作爲原料來製造板帶之雙輥鑄造機。 【圖式簡單說明】 第1圖係顯示裝設有習知的冷卻輥清掃裝置的一例之 φ 雙輥鑄造機的槪念圖。 第2圖係與第1圖相關聯的俯視槪略圖。 第3圖係顯示裝設有本發明的冷卻輥清掃裝置的一例 之雙輥鑄造機的槪念圖。 第4圖係顯示第3圖的刷子的槪略圖。 第5圖係顯示刷子的變形例的槪略圖。 第6圖係顯示刷子的其他變形例的槪略圖。 〇 【主要元件符號說明】 1 :冷卻輥 1 0 :排氣鼓風機 1 3 :刷子 14 :吸引孔 15 :胴部 1 6 :絞線群 18 :粉塵吸引口 2 0 :整流罩 -13- 200936263 2 2 :絞線群 23 :絞線群200936263 IX. Description of the Invention [Technical Field] The present invention relates to a cooling roll cleaning device for a twin roll casting machine. [Prior Art] As a method of directly producing a strip from a molten metal, there is a two-roll continuous casting method in which a molten φ metal is supplied between a pair of horizontally arranged rolls, and the solidified metal is thinned. Send out. 1 and 2 show a twin-roll casting machine equipped with an example of a conventional cooling roll cleaning device, which includes a pair of horizontally arranged cooling rolls 1 and a pair of side banks attached to the cooling rolls 1. 2. In the cooling roll 1, the cooling water is circulated inside, and the reduction roll gap G is enlarged in accordance with the thickness of the steel strip 3 to be produced. The rotation direction and speed of the cooling roll 1 are set such that the outer peripheral surface of each of the cooling rolls 1 moves at a constant speed from the upper side toward the roll gap G. Φ One of the side banks 2 is in surface contact with one end of each of the cooling rolls 1, and the other side bank 2 is in surface contact with the other end of each of the cooling rolls 1. Between the pair of side banks 2, the molten metal supply nozzle 4 is disposed directly above the roll gap G, and the molten metal is supplied from the bucket (not shown) to the molten metal supply nozzle 4 to supply the molten metal to the molten metal. The molten metal pool 5 is formed by the space surrounded by the cooling roll 1 and the side bank 2. In other words, when the molten metal pool 5 is formed, the cooling roll 1 that dissipates heat by circulating the cooling water is rotated, and the molten metal is solidified on the outer peripheral surface of the cooling roll 1 to be formed on the outer peripheral surface of each of the cooling rolls 1. The solidified shells-5- 200936263 6 are attached to each other, and the steel strip 3 is fed below the roll gap G. At this time, in order to make the thickness of the steel strip 3 a target enthalpy, the axial box (not shown) pivotally supporting the neck of each of the cooling rolls 1 is biased in a direction in which they approach each other. With the accumulation of the working hours, oxides containing manganese and antimony may adhere to the outer peripheral surface of the cooling roll 1, and if the thickness of the oxide adhesion layers is increased, the heat conduction of the molten metal toward the cooling roll 1 is hindered, and cooling is hindered. The formation of the solidified shell 6 on the outer peripheral surface of the roll 10. Therefore, in the conventional method, a cylindrical brush 7 that is in contact with the entire length of the outer peripheral surface in the axial direction is disposed in each of the cooling rolls 1, and the brush 7 is directed toward the cooling roll 1 by a motor (not shown). Rotating in the same direction to perform honing cleaning of the outer peripheral surface of the cooling roll 1 removes the oxide adhesion layer (see, for example, Patent Documents 1 and 2). The portions of the respective brushes 7 that are not opposed to the cooling rolls 1 are covered by a cowling 8 respectively. Further, in each of the fairings 8, a plurality of dust suction ports 9 arranged in the axial direction of the cooling roll 1 are symmetrically arranged, and the dust suction port 9 is connected to the exhaust blower 1〇 to prevent honing The dust that occurred during the cleaning was scattered. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. - 200936263 The strands 12, the dust falling into the strands 12 of the high density planting are not easily attracted to the outside of the fairing 8. The range α of the cleanness of the brush 7 which is honed and cleaned over the entire length of the outer peripheral surface of the cooling roll 1 in the axial direction is less likely to remain in the strand (constituting the brush 7) and the crucible. The dust of the part 'but the further away from the dust suction port 9, the more the amount of dust remaining on the strands (constituting the brush 7) and the crotch portion. φ The degree of cleanness of the brush 7 is reflected to the cooling roll 1, and a part of the residual dust remaining at a portion away from the dust suction port 9 of the brush 7 is transferred to the outer peripheral surface of the cooling roll 1, and the molten metal is prevented from being cooled toward the cooling. Heat transfer from roller 1. In other words, in the outer circumferential surface of the cooling roll 1, the portion where the range α in the vicinity of the dust suction port 9 of the brush 7 abuts, although the formation of the solidified shell 6 can progress smoothly, but in other portions, the dust interferes with heat conduction. The formation of the solidified shell 6 does not progress smoothly. Therefore, as shown in FIG. 2, the steel strip 3 fed by the pair of cooling rolls 1 will be in a state of being bonded to each other in the mountain portion where the formation of the solidified shell 6 is smoothly progressed, but along the axis of the cooling roll 1 An unsolidified area occurs in the valley portion between the mountain portions in the direction. Further, the steel sheet 3 which has been contracted by solidification has a non-uniform thickness distribution in the sheet width direction, and may be cracked. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a chill roll cleaning device which can ensure the high-definition clarity of a brush. In order to achieve the above object, the chill roll cleaning device of the present invention is provided with a brush of 200936263; the brush has a plurality of suction holes (through the outer peripheral surface) and is rotatable in parallel with respect to the axis of the cooling roller. a tubular crotch portion, a strand group attached to the outer peripheral surface of the crotch portion and having a tip end abutting on the outer circumferential surface of the cooling roll by the rotation of the crotch portion, and one end of the crotch portion A dust suction port that communicates with a space inside the crotch portion; and an exhaust mechanism is connected to the dust suction port. Specifically, the strand group for honing and sweeping is planted so as to form a spiral row from one end of the weir portion toward the other end on the outer peripheral surface of the Φ portion of the weir portion. Alternatively, the strand group for honing and sweeping is planted so that a plurality of rows from one end of the weir portion toward the other end are formed on the outer peripheral surface of the weir portion. Further, it is also possible to select a structure in which the hair length, the wire diameter, or the material of the strand group is changed column by column, and a structure in which the portion of the brush which is not opposed to the cooling roller is covered with a flow hood. According to the chill roll cleaning device of the present invention, the following excellent effects can be obtained. Φ (1) Since a plurality of suction holes are formed in the crotch portion of the outer peripheral surface of the stranded wire, the dust generated by the honing sweep enters the space inside the crotch portion through the suction hole and is discharged through the dust suction port, thereby ensuring the brush HD clarity. (2) By adopting a structure in which a strand group is planted on the outer peripheral surface of the crotch portion to form a spiral row from one end of the crotch portion toward the other end, or a strand group is planted on the outer peripheral surface of the crotch portion In the structure of forming a plurality of rows from one end of the crotch portion toward the other end, the range of the plurality of strands simultaneously abutting against the outer peripheral surface of the cooling roller is narrowed, and the strand can be secured even if the brush is pressed against the cooling roller without force The group is pressed against the contact surface of the chill roll to surely remove the oxide-8-200936263 deposit from the outer peripheral surface of the chill roll. (3) Therefore, the thickness distribution in the width direction of the strip fed by the cooling roller tends to be averaged, and cracking can be prevented. [Embodiment] Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 3 and Fig. 4 show a twin-roll casting machine equipped with a cooling roll cleaning device of the present invention. In the drawings, the same reference numerals as those in the first and second figures represent the same members. . In the chill roll cleaning device, the brush 13 disposed on each of the cooling rolls 1 is rotated by the motor 9 (not shown) in the same direction as the cooling roll, and the outer peripheral surface of the cooling roll 1 is honed and cleaned. Thereby, the oxide adhesion layer is removed. The brush 13 has a tubular portion 15 that is provided with a plurality of suction holes (through the outer peripheral surface), and the outer peripheral surface of the crotch portion 15 is disposed so as to be from the end of the crotch portion 15 toward the other end. The twisted wire group 16 for honing and cleaning, which is formed in a spiral row, passes through the annular plate 17 (fitted to one end of the crotch portion 15), and is assembled into a coaxial hollow shaft-shaped dust suction port 18 in the crotch portion 15 And a coaxial support shaft 19 is assembled to the crotch portion 15 through the plate member (the other end of the crotch portion 15 is not shown); the brush 13 is disposed parallel to the axis of the cooling roll 1, and is supported by the crucible The rotation of the portion 15 causes the tips of the strand groups 16 to sequentially abut against the outer circumferential surface of the cooling roll 1. The above description of "the twisted wire group 16 for honing and cleaning which is implanted in a spiral row" includes the hole number implanted in the crotch portion 15 - 200936263 into a predetermined number The method of bunching the strands, or the method of attaching a channel brush to the crotch portion 15 to restrain the strands with a long retainer in a predetermined thickness. The portions of the respective brushes 1 that are not opposed to the cooling rolls 1 are covered by the fairing 20, respectively. The hollow shaft-shaped dust suction port 18 that communicates with the space in the crotch portion 15 is connected to the forced discharge by a rotary joint (to allow the brush 13 to rotate, not shown in φ) and the pipe 2 1, The exhaust blower 10 of the exhaust mechanism prevents the dust generated by the honing sweep from scattering. When the double roll casting machine is operated, the brush 13 is rotated in the same direction as the cooling roll 1 by a motor (not shown) to clean the outer peripheral surface of the cooling roll 1 to remove the oxide adhesion layer and to exhaust the gas. The blower 10 operates to trap dust inside each fairing 20. In the outer peripheral surface of the crotch portion 15, since the strand group 16 is planted to form a spiral row from one end of the crotch portion 15 toward the other end, the strand group 16 is simultaneously narrowed in the range of the outer peripheral surface of the cooling roll 1 The width direction profile of the outer circumferential surface of the cooling roller 1 does not directly affect the brush 13 and the contact surface pressure of the strand group 16 against the cooling roller 1 can be ensured even if the brush 13 is not particularly pressed against the cooling roller 1. On the other hand, the adhesion layer of the oxide can be surely removed from the outer peripheral surface of the cooling roll 1. Further, since the pressing force of the brush 13 can be reduced, it is possible to reduce the size of the mechanism (the pressing cylinder or the like) for pressing the brush 13 against the cooling roller 1, and the driving energy necessary for the mechanism for rotating the brush 13. The reduction and so on. Further, the dust generated by the honing sweep enters the space in the crotch portion 15 from the plurality of suction holes 14 -10- 200936263 and is directly discharged to the outside of the fairing 20 via the dust suction port 18, and the strand group 16 The low planting density is that it is difficult for the whitefly to enter the strand group 1 6 ' and the high purity of the brush 13 can be ensured. That is, even if the dust enters the strand group 6 or adheres to the surface of the body 15, the suction hole 14 can quickly and surely attract dust and be discharged from the crotch portion 15. Further, since the brush 13 is covered by the fairing 20, it is possible to appropriately prevent the dust from scattering around the brush 13. Further, it is easy to form a negative pressure with respect to the periphery of the brush 13 (inside of the cowling 20) with respect to the surroundings (the outside of the cowling 20), and the dust can be efficiently recovered by the operation of the exhaust blower 10. In this way, the formation of the solidified shell 6 (see FIG. 2) can be smoothly performed on the outer peripheral surface of the cooling roll 1, and the thickness distribution in the thickness direction of the steel strip 3 sent from the cooling roll 1 tends to be averaged, and cracking can be avoided. open. Fig. 5 is a view showing a modification of the brush 13, in addition to the spiral row formed by the strand group, 'planting on the outer peripheral surface of the crotch portion 15 in a spiral row from one G end to the other end of the crotch portion 15 The strands 22 for cleaning are honed, thus forming two spiral rows. The twisted wire group 16, 22' can adopt the same kind to obtain the honing cleaning effect, and can also lengthen the hair length of the strand group 16, 22 from the outer peripheral surface of the dam portion 15 to the front end of the strand. , wire diameter, material, etc. are changed to obtain different honing and cleaning effects. Fig. 6 is a view showing another modification of the brush 13 in which a plurality of strands 23 for honing and cleaning are formed in such a manner that a plurality of rows from the crotch portion 15 end to the other end are formed on the outer peripheral surface of the crotch portion i 6 . Planting is carried out in the circumferential direction of the crotch portion 15 at intervals of -11 - 200936263. Each of the strand groups 23 is formed to extend obliquely with respect to the axis of the crotch portion 15. At one end and the other end of the crotch portion 15, the planting position is at a different position in the circumferential direction of the crotch portion 16, so that the strand group 23 simultaneously arrives The range of the outer peripheral surface of the cooling roll 1 (refer to FIG. 3) is narrowed, and the width direction profile of the outer peripheral surface of the cooling roll 1 does not directly affect the brush 13, even if the brush 13 is pressed against the cooling roll without special force. 1. The contact surface pressure of the strand group 23 with respect to the cooling roll φ 1 can be ensured, and the oxide adhesion layer can be surely removed from the outer peripheral surface of the cooling roll 1. Further, the dust generated by the honing sweep enters the space in the crotch portion 15 from the plurality of suction holes 14, and is directly discharged to the outside of the cowl 20 (refer to FIG. 3) via the dust suction port 18, and The planting density of the strand group 23 is low, and it is difficult for the dust to enter the strand group 23, and the high-definition clarity of the brush 13 can be ensured. That is, even if the dust enters the strand group 23 or adheres to the surface of the body 15, the suction hole 14 can quickly and surely attract the dust hopper and be discharged from the jaw portion 15. Further, in the above embodiment, the suction hole for attracting dust is provided only in the crotch portion 15, but the converging cover 20 may be provided with a suction hole. In other words, the dust in the vicinity of the brush 13 can be sucked by the suction holes of the crotch portion 15, and can be sucked by the suction holes of the cowl 20, so that the dust can be more reliably collected. The winding direction of the rows of the strand groups 16, 22 may be twisted to the right or may be twisted to the left. The direction of rotation of the brush 13 itself is not particularly limited. Further, the chill roll cleaning device of the present invention is not limited to the above-described -12-200936263 embodiment, and it is of course possible to make any changes without departing from the gist of the present invention. The chill roll cleaning device of the present invention can also be applied to a two-roller casting machine which uses a metal other than steel as a raw material to manufacture a slat. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a φ twin-roll casting machine equipped with an example of a conventional cooling roll cleaning device. Figure 2 is a top plan view associated with Figure 1. Fig. 3 is a view showing a twin-roll casting machine in which an example of the cooling roll cleaning device of the present invention is mounted. Fig. 4 is a schematic diagram showing the brush of Fig. 3. Fig. 5 is a schematic diagram showing a modification of the brush. Fig. 6 is a schematic diagram showing another modification of the brush. 〇 [Main component symbol description] 1 : Cooling roller 1 0 : Exhaust blower 1 3 : Brush 14 : Suction hole 15 : Crotch part 1 6 : Strand group 18 : Dust suction port 2 0 : Fairing-13 - 200936263 2 2: Stranded Group 23: Stranded Group