TWI703080B - Blade member of impeller for paper conveying - Google Patents

Abstract

The present invention relates to a blade member of an impeller for conveyance of paper, which is provided with at least one blade member arranged to protrude from the outer peripheral surface of a rotatable cylindrical member, and including a thermosetting polyurethane elastomer A plurality of core wires are arranged side by side in the axial direction of the rotating shaft of the cylindrical member, and at least a part of the core wires are embedded in the blade member body.

Description

Blade member of impeller for paper conveying

The present invention relates to a blade member of an impeller for conveying paper sheets.

Automatic ticket gates, automatic cash register and change machines, currency exchange machines, automatic ticket vending machines, etc., are equipped with paper transport devices such as banknotes, magnetic cards, and tickets. Regarding the conveying device, an impeller for conveying paper sheets is used. The impeller system for paper conveyance is comprised by mounting a plurality of blade members radially in the radial direction orthogonal to the rotating shaft of the rotatable cylindrical member. Furthermore, the impeller for conveyance of paper sheets rotates the blade member at a high speed and comes into contact with the paper sheets, and the paper sheets are conveyed by frictional force at the time of contact. The blade members are in contact with paper, so they undergo plastic deformation due to long-term use, resulting in damage such as wear, cracks, and defects. Due to the plastic deformation of the blade member, the contact with the paper becomes insufficient, which causes transportation errors and the like. Therefore, a structure in which the blade member is detachably mounted on the cylindrical member so that the blade member can be replaced has also been proposed. That is, the blade member is required to suppress plastic deformation and improve bending durability. Therefore, in order to suppress the plastic deformation of the blade member and improve the bending durability, Patent Document 1 proposes a blade member that is formed by casting, uses thermosetting urethane, and uses aromatic core wire Group polyamide twisted yarn. In addition, Patent Document 2 proposes a blade member using thermosetting polyurethane and a core wire containing nylon. However, even the blade members shown in Patent Documents 1 and 2 cannot sufficiently satisfy the bending durability. In order to suppress the plastic deformation of the blade members, it is required to improve the bending durability to ensure the strength and the flexibility of bending. That is, the blade member is required to be resistant to plastic deformation, that is, it is required to improve the bending durability and to be able to return to its original shape. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. 2013-155032 [Patent Document 2] Japanese Patent Laid-Open No. 2015-205771

[Problem to be Solved by the Invention] The present invention solves the above-mentioned problems, and its object is to provide a blade member of an impeller for paper conveyance that suppresses plastic deformation and improves bending durability and restoration. [Technical Means for Solving the Problem] In order to solve the above-mentioned problems, the blade member of the impeller for paper transport of the present invention is characterized in that at least one blade member is arranged to protrude from the outer peripheral surface of the rotatable cylindrical member, and It is provided with: a blade member body including a thermosetting polyurethane elastomer; and a core wire including a polyester fiber, at least a part of which is embedded in the interior of the blade member body, and on the rotating shaft of the cylindrical member A plurality of them are arranged side by side in the axial direction. In this structure, at least one blade member of the impeller for paper transport is arranged so as to protrude from the outer peripheral surface of the rotatable cylindrical member. Furthermore, the blade member of the impeller for conveyance of paper sheets can also be contacted and conveyed. Furthermore, the blade member of the impeller for paper conveyance is equipped with a blade member body and a core wire. The blade member body contains a thermosetting polyurethane elastomer. The core thread contains polyester fiber. At least a part of the core wire is buried in the body of the blade member. In addition, the core wires are arranged side by side in the axial direction of the rotating shaft of the cylindrical member. Regarding the blade member body, from the standpoint of restorability, an elastomer material with excellent elasticity is preferred. Among the elastomer materials, the thermosetting polyurethane elastomer is particularly excellent in abrasion resistance and elasticity. In addition, the polyester fiber system forming the core thread is excellent in heat resistance and strength. Regarding the core wire, from the viewpoint of bending durability, polyester fiber, aromatic polyamide fiber, and nylon fiber are preferable, and it is particularly suitable for polyester fiber that is not easily buckled by plastic deformation. Since the body of the blade member contains thermosetting polyurethane elastomer and the core wire contains polyester fiber, the deformation force (compression force) generated in the core wire during bending can be reduced, and the bending durability and recovery of the blade member Sexual improvement. That is, the blade member of the impeller for paper conveyance of the present invention can suppress plastic deformation, and improve bending durability and restorability. From another viewpoint, it is preferable that the blade member of the impeller for paper conveyance of this invention has the following structure. The fineness of the core wire is in the range of 100 to 300 deniers. In addition, the fineness of the core wire is in the range of 120 to 180 deniers. In this structure, the fineness of the core wire is preferably in the range of 100 to 300 deniers. The diameter of the core wire (core wire diameter) is preferably in the range of 0.10 to 0.19 mm. Furthermore, the fineness of the core wire is more preferably in the range of 120 to 180 deniers. That is, the diameter of the core wire is relatively thin. When the diameter of the core wire is thick, the deformation force (compressive force) inside the core wire (especially near the outer periphery of the paper conveying impeller) becomes larger when the core wire is bent compared with the case where the diameter of the core wire is small. Produce buckling and fracture. Therefore, by making the diameter of the core wire relatively thin, the deformation force (compression force) generated inside the core wire during bending can be reduced, and the bending durability can be improved. That is, the blade member of the impeller for paper conveyance of this structure can suppress plastic deformation, and further improve the bending durability and restorability. From another viewpoint, it is preferable that the blade member of the impeller for paper conveyance of this invention has the following structure. The main body of the blade member includes a thermosetting polyurethane elastomer that does not contain a plasticizer. Alternatively, the blade member body includes a thermosetting polyurethane elastomer containing a plasticizer, and relative to 100 parts by weight of the thermosetting polyurethane elastomer, the plasticizer is 20 parts by weight The following. Alternatively, the blade member body includes a thermosetting polyurethane elastomer containing a plasticizer, and the plasticizer is 5 parts by weight relative to 100 parts by weight of the thermosetting polyurethane elastomer. The following. In this configuration, the blade member body preferably contains a thermosetting polyurethane elastomer containing a plasticizer, and relative to 100 parts by weight of the thermosetting polyurethane elastomer, the plasticizer It is 20 parts by mass or less. Furthermore, the blade member body is more preferably composed of a thermosetting polyurethane elastomer containing a plasticizer, and the plasticizer is 5 parts by weight relative to 100 parts by weight of the thermosetting polyurethane elastomer. The following. Furthermore, it is more preferable that the blade member body contains a thermosetting polyurethane elastomer that does not contain a plasticizer. Here, if a large amount of plasticizer is contained in the main body of the blade member, the plasticizer will ooze out and transfer to the surface of the paper during the repeated contact between the main body of the blade member and the paper during long-term use. Therefore, the body of the blade member in contact with the paper is plastically deformed, causing warpage of the blade member. Therefore, by reducing the plasticizer contained in the body of the blade member or eliminating the plasticizer in the body of the blade member, the warpage of the blade member is relatively reduced, and the resilience is improved. That is, the blade member of the impeller for paper conveyance of this structure can suppress plastic deformation, and further improve the bending durability and restorability. From another viewpoint, it is preferable that the blade member of the impeller for paper conveyance of this invention has the following structure. The core wires are arranged side by side in the axial direction of the rotating shaft so that the interval between the adjacent core wires is in the range of 0.25 to 0.50 mm. Alternatively, the core wires are arranged side by side in the axial direction of the rotating shaft so that the interval between the adjacent core wires is in the range of 0.25 to 0.30 mm. In this configuration, it is preferable that the core wires are arranged side by side in the axial direction of the rotating shaft so that the interval between the adjacent core wires is in the range of 0.25 to 0.50 mm. In addition, it is more preferable that the core wires are arranged side by side in the axial direction of the rotating shaft so that the interval between adjacent core wires is in the range of 0.25 to 0.30 mm. When the distance between adjacent core wires is less than 0.25 mm, the number of core wires embedded in the blade member body increases. Moreover, the rigidity of the blade member becomes larger, resulting in a decrease in the bending property of the blade member. In addition, when the distance between adjacent core wires exceeds 0.50 mm (especially 0.30 mm), the number of core wires embedded in the blade member body decreases. Moreover, there is a possibility that the deformation force generated inside the core wire during bending cannot be sufficiently reduced. Therefore, if the interval between adjacent core wires is in the range of 0.25 to 0.50 mm (especially in the range of 0.25 to 0.30 mm), the bendability of the blade member can be appropriately maintained. That is, the blade member of the impeller for paper conveyance of this structure can suppress plastic deformation, and further improve the bending durability and restorability. From another viewpoint, it is preferable that the blade member of the impeller for paper conveyance of this invention has the following structure. The blade member is arranged so as to protrude from the outer peripheral surface of the cylindrical member in a radial direction orthogonal to the axial direction of the rotary shaft of the cylindrical member, and the core wire is buried in the radial direction of the rotary shaft of the cylindrical member. Here, "in the radial direction" is not limited to meaning parallel to the radial direction. The term "along the radial direction" includes the case where it is bent in the radial direction or the case where it is inclined at a specific angle with respect to a straight line indicating the radial direction. [Effects of the Invention] As described above, according to the present invention, it is possible to provide a blade member of an impeller for paper conveyance that suppresses plastic deformation and improves bending durability and restorability.

[表2]

如表1、2所示，實施例1～9係本體之材質與芯線之材質之組合為「聚胺基甲酸酯＋聚酯」之組合。比較例1～4係本體之材質與芯線之材質之組合為「聚胺基甲酸酯＋尼龍」之組合。比較例5～8係本體之材質與芯線之材質之組合為「聚胺基甲酸酯＋芳香族聚醯胺」之組合。比較例9係本體之材質與芯線之材質之組合為「氫化腈橡膠＋聚酯」。而且，針對實施例之紙張類搬送用葉輪之葉片構件20及比較例之紙張類搬送用葉輪之葉片構件120，進行彎曲耐久性試驗及復原性試驗。彎曲耐久性試驗係針對實施例1～9之紙張類搬送用葉輪之葉片構件20及比較例1～9之紙張類搬送用葉輪之葉片構件120進行。於彎曲耐久性試驗中，使用如圖4所示之試驗裝置30。彎曲耐久性試驗之試驗裝置30係經由桿33將馬達31與不鏽鋼板之滑動基面32連接。彎曲耐久性試驗之試驗裝置30係以藉由馬達31之旋轉使安裝於桿33上之滑動基面32按圖4(a)及圖4(b)之箭頭方向之順序往返運動之方式構成。而且，於固定構件35上安裝有實施例之紙張類搬送用葉輪之葉片構件20及比較例之紙張類搬送用葉輪之葉片構件120。實施例之紙張類搬送用葉輪之葉片構件20及比較例之紙張類搬送用葉輪之葉片構件120係以與滑動基面32接觸，並藉由滑動基面32之往返運動而按圖4(a)及圖4(b)之箭頭方向之順序彎曲之方式安裝。使用該試驗裝置30，針對實施例1～9之紙張類搬送用葉輪之葉片構件20及比較例1～9之紙張類搬送用葉輪之葉片構件120，將1次往返作為1次彎曲，以300次彎曲/分鐘之速度進行往返運動。而且，對約7萬次彎曲時及約170萬次彎曲後的實施例之紙張類搬送用葉輪之葉片構件20及比較例之紙張類搬送用葉輪之葉片構件120判定有無破損、塑性變形。將實施例1～9之紙張類搬送用葉輪之葉片構件20之彎曲耐久性試驗之試驗結果示於表1。將比較例1～9之紙張類搬送用葉輪之葉片構件120之彎曲耐久性試驗之試驗結果示於表2。再者，於彎曲耐久性試驗中，根據紙張類搬送用葉輪之葉片構件之長度減少之比率、及紙張類搬送用葉輪之葉片構件之塑性變形之狀態為彎曲或彎折，而判定紙張類搬送用葉輪之葉片構件有無塑性變形。於彎曲耐久性試驗中，測量彎曲耐久性試驗前的圓筒構件10之與旋轉軸11之軸向G正交的徑向上之圓筒構件10之中心至葉片構件20之前端的長度L11、及彎曲耐久性試驗後的圓筒構件10之與旋轉軸11之軸向正交的徑向上之圓筒構件10之中心至葉片構件20之前端的表觀長度L12。而且，測定L11與L12之長度之差之比率作為葉片構件之長度減少之比率。而且，於紙張類搬送用葉輪之葉片構件之長度未減少之情形時，判定為無塑性變形。於紙張類搬送用葉輪之葉片構件之長度之減少未達2%且塑性變形之狀態為彎曲之情形時，將紙張類搬送用葉輪之葉片構件之塑性變形之程度判定為A。於紙張類搬送用葉輪之葉片構件之長度之減少未達2%且塑性變形之狀態為彎折之情形時，將紙張類搬送用葉輪之葉片構件之塑性變形之程度判定為B。於紙張類搬送用葉輪之葉片構件之長度之減少為2%以上且塑性變形之狀態為彎曲或彎折之情形時，將紙張類搬送用葉輪之葉片構件之塑性變形之程度判定為C。而且，如下般判定對紙張類搬送用葉輪之葉片構件之彎曲耐久性的綜合評價。於紙張類搬送用葉輪之葉片構件未破損及塑性變形之情形時，視為◎。於紙張類搬送用葉輪之葉片構件未破損但存在略微塑性變形之情形時，視為○。於紙張類搬送用葉輪之葉片構件破損但為實用上使用無問題之程度之情形時，視為△。於紙張類搬送用葉輪之葉片構件破損且為實用上無法使用之破損之情形時，視為×。如表1、2所示，本體之材質與芯線之材質之組合為「聚胺基甲酸酯＋聚酯」之組合之實施例1～9之紙張類搬送用葉輪之葉片構件20係綜合評價為◎、○、△。又，本體之材質與芯線之材質之組合為「聚胺基甲酸酯＋聚酯」以外之組合的比較例1～9之紙張類搬送用葉輪之葉片構件120係綜合評價為×。即，可確認本體之材質與芯線之材質之組合為「聚胺基甲酸酯＋聚酯」之組合的實施例1～9之紙張類搬送用葉輪之葉片構件20與其他組合之比較例1～9之紙張類搬送用葉輪之葉片構件120相比較，彎曲耐久性更優異。又，於實施例1～9之紙張類搬送用葉輪之葉片構件20之中，改變芯線之纖度而比較優劣。若將改變了芯線之纖度的實施例1、2、3、6、7之紙張類搬送用葉輪之葉片構件20加以比較，則可確認纖度處於100～300丹尼之範圍的實施例1、2、3之紙張類搬送用葉輪之葉片構件20之綜合評價為◎或○，與實施例6、7之紙張類搬送用葉輪之葉片構件20相比彎曲耐久性更優異。關於實施例6之紙張類搬送用葉輪之葉片構件20，可認為由於芯線之纖度為90丹尼而極細，因此無法保持葉片構件20之剛性而容易破損，前端少許產生了破裂。關於實施例7之紙張類搬送用葉輪之葉片構件20，可認為由於芯線之纖度為450丹尼而較粗，因此彎曲時之芯線內部之變形力較大而產生了芯線之挫曲。再者，關於實施例7之紙張類搬送用葉輪之葉片構件20，由於芯線較粗而無法以0.3 mm間距配置芯線，因此將芯線設為0.5 mm間距。即，可確認若減小葉片構件之芯線之纖度，則進一步抑制破損、塑性變形。又，於實施例1～9之紙張類搬送用葉輪之葉片構件20之中，改變芯線之間距而比較優劣。若將改變了芯線之間距的實施例1、4、5、8、9之紙張類搬送用葉輪之葉片構件20加以比較，則可確認間距處於0.25～0.50 mm之範圍的實施例1、4、5之紙張類搬送用葉輪之葉片構件20之綜合評價為◎或○，與實施例8、9之紙張類搬送用葉輪之葉片構件20相比彎曲耐久性更優異。關於實施例8之紙張類搬送用葉輪之葉片構件20，可認為由於芯線之間距為0.2 mm而變得密集，葉片構件之彎曲性減小，因此產生了芯線之挫曲。關於實施例9之紙張類搬送用葉輪之葉片構件20，可認為由於芯線之間距為0.7 mm而變寬，因此無法保持葉片構件之剛性，容易破損，前端少許產生了破裂。即，可確認若減小葉片構件之芯線之間距，則進一步抑制破損、塑性變形。於復原性試驗中，改變塑化劑之添加量而確認復原性之差異。復原性試驗係針對實施例1、2、3、5、10～15各自之紙張類搬送用葉輪之葉片構件20進行。於復原性試驗中，使用如圖5(a)所示之試驗裝置40。復原性試驗之試驗裝置40係以具有馬達(未圖示)之方式構成。復原性試驗之試驗裝置40係於以能夠旋轉之方式安裝於馬達之圓筒構件10上，裝配有4片實施例1及實施例3之紙張類搬送用葉輪之葉片構件20。於復原性試驗中，使實施例1、2、3、5、10～15各自之紙張類搬送用葉輪1以1000 rpm旋轉，使實施例1、2、3、5、10～15各自之紙張類搬送用葉輪之葉片構件20連續地與普通紙41接觸。圖5(b)係表示復原性試驗前之葉片構件20之形狀之模式圖，圖5(c)係表示復原性試驗後之葉片構件20之形狀之模式圖。於復原性試驗中，測量復原性試驗前的圓筒構件10之與旋轉軸11之軸向G正交的徑向上之圓筒構件10之中心至葉片構件20之前端的長度L1、及復原性試驗後的圓筒構件10之與旋轉軸11之軸向正交的徑向上之圓筒構件10之中心至葉片構件20之前端的表觀長度L2。而且，測定L1與L2之長度之差之比率作為葉片構件之前端之減少率(以下稱作「葉片構件前端減少率」)。將針對實施例1、2、3、5、10～15分別進行之復原性試驗中之葉片構件前端減少率示於表3。再者，於表3中表示彎曲耐久性試驗及復原性試驗之試驗結果。[表3]

又，將針對實施例1及實施例12之紙張類搬送用葉輪之葉片構件20的復原性試驗之試驗結果表示於圖6。此處，圖6所示之所謂行程數，係指葉片構件20與普通紙接觸之次數。於圖6中，描繪4片葉片構件之平均值作為葉片構件前端減少率。如圖6所示，隨著行程數增加，葉片構件前端減少率不斷變大。其原因在於：由於葉片構件20之前端之磨耗，最初筆直之葉片構件20朝一個方向彎曲而塑性變形(彎曲變形)成弓狀，該彎曲變形逐漸變大。此處，所謂復原力之提昇，係指於彎曲變形後欲恢復至原本之筆直形狀之力變大。即，復原性試驗前與試驗後之葉片構件20之長度之差變小。由此，根據圖6所示之復原性試驗之試驗結果可知，實施例12之未添加塑化劑之葉片構件20與實施例1之添加有塑化劑之葉片構件20相比前端減少率變小。由以上內容可確認，實施例12之未添加塑化劑之葉片構件20與實施例1之葉片構件20相比復原力提昇。如表3所示，所測得之各實施例之5000萬次行程時之葉片構件前端減少率係實施例1之紙張類搬送用葉輪之葉片構件20為2.3%，相對於此，實施例10之紙張類搬送用葉輪之葉片構件20為1.9%，實施例11之紙張類搬送用葉輪之葉片構件20為1.7%、實施例12之紙張類搬送用葉輪之葉片構件20為1.4%。由此可知，隨著減少塑化劑，前端減少率下降，於維持彎曲耐久性之狀態下復原性提昇。同樣地，若針對芯線之纖度或間距不同的實施例2、3、5之紙張類搬送用葉輪之葉片構件20，將分別不含塑化劑之實施例13、14、15之紙張類搬送用葉輪之葉片構件20加以比較，則可知前端減少率均下降，復原性提昇。由以上內容可知，根據本發明之實施例及比較例，對於紙張類搬送用葉輪之葉片構件之葉片構件本體而言，與氫化腈橡膠(H-NBR)相比而熱硬化性聚胺基甲酸酯彈性體之情況下不易塑性變形，可提高彎曲耐久性。又，於紙張類搬送用葉輪之葉片構件之葉片構件本體包含熱硬化性聚胺基甲酸酯彈性體之情形時，可知以下內容。可知若葉片構件之芯線為聚酯纖維而非尼龍纖維或芳香族聚醯胺纖維，則可提高彎曲耐久性。又，關於葉片構件之芯線之間距，可知與0.2 mm或0.7 mm相比而0.25 mm、0.3 mm或0.5 mm之情況下不易塑性變形，可提高彎曲耐久性。進而，關於葉片構件之芯線之間距，可知與0.5 mm相比而0.25 mm或0.3 mm之情況下不易塑性變形，可提高彎曲耐久性。又，關於葉片構件之芯線之纖度，可知與90丹尼或450丹尼相比而100丹尼、150丹尼、300丹尼之情況下不易塑性變形，可提高彎曲耐久性。進而，關於葉片構件之芯線之纖度，可知與100丹尼或300丹尼相比而150丹尼之情況下不易塑性變形，可提高彎曲耐久性。又可知，葉片構件本體亦可於熱硬化性聚胺基甲酸酯彈性體中包含塑化劑，但其上限值相對於熱硬化性聚胺基甲酸酯彈性體100重量份而較佳為20質量份。進而可知，熱硬化性聚胺基甲酸酯彈性體中不含塑化劑之情況下，葉片構件本體之復原力提昇。因此可知，紙張類搬送用葉輪之葉片構件若葉片構件本體為不含塑化劑之熱硬化性聚胺基甲酸酯彈性體且葉片構件之芯線為聚酯纖維，則可抑制塑性變形而提高彎曲耐久性。進而可知，為了進一步提高彎曲耐久性，只要芯線之纖度為100～300丹尼之範圍(更佳為120～180丹尼之範圍)且芯線之間距為0.25～0.50 mm之範圍(更佳為0.25～0.30 mm之範圍)即可。本申請案係基於2016年11月30日提出申請之日本專利申請2016-232864、及2017年11月27日提出申請之日本專利申請2017-226925，其內容係作為參照而併入至本文中。[產業上之可利用性]若利用本發明，則可提供一種抑制塑性變形而提高彎曲耐久性之紙張類搬送用葉輪之葉片構件。The embodiments of the present invention will be described with reference to the drawings. The blade member of the impeller for paper conveyance of this embodiment is used for the impeller for paper conveyance. The impeller system for paper conveying is a conveying device for conveying paper. The transport device is installed in an automatic ticket gate, an automatic cash register and change machine, a currency exchange machine, an automatic ticket vending machine, etc., in order to transport or collect paper such as banknotes, magnetic cards, and tickets. (Configuration of Impeller for Paper Transport) As shown in FIG. 1, the impeller 1 for paper transport has a cylindrical member 10 and a blade member 20. In this embodiment, the blade member 20 is arranged along the radial direction orthogonal to the axial direction G of the rotating shaft 11 of the cylindrical member 10. The blade member 20 is arranged so as to protrude from the outer peripheral surface of the cylindrical member 10. In FIG. 1, the axial direction G and the circumferential direction R of the rotating shaft 11 are indicated by arrows. In this embodiment, four blade members 20 are arranged on the tube member 10. The four blade members 20 are arranged at equal intervals in the circumferential direction R of the rotating shaft 11 of the cylindrical member 10. In addition, the number of blade members 20 is not limited to four. The number of blade members 20 may be one or more. The number of blade members 20 is preferably 2-16. In addition, the blade members 20 may not be arranged at equal intervals in the circumferential direction R of the rotation axis of the cylindrical member 10. (Configuration of Cylinder Member) As shown in Fig. 2, the cylinder member 10 is formed into a substantially cylindrical shape. In addition, the cylindrical member 10 is not limited to a substantially cylindrical shape. The cylindrical member 10 may be formed in a substantially polygonal shape. The cylindrical member 10 has a rotating shaft 11 (refer to FIG. 1( b )), a base 12, a shaft hole 13, and a notch 14. The base 12 may also be formed of a resin material. The base 12 is formed of engineering plastic, for example. Engineering plastics are polyacetal, polyamide, polybutylene terephthalate, etc. The base 12 has an upper surface 12a, a bottom surface 12b, and an outer peripheral surface 12c. In this embodiment, the shaft hole 13 is formed in the approximate center of the upper surface 12a and the bottom surface 12b (refer FIG. 1(b)). Insert the rotating shaft 11 into the shaft hole 13. That is, the rotating shaft 11 is arranged such that its axial direction is along the axial direction of the cylindrical member 10. Furthermore, the base 12 is supported by the rotating shaft 11 so as to be non-rotatably. That is, the base 12 is fixed to the rotating shaft 11. Furthermore, the cylindrical member 10 may not have the shaft hole 13. That is, the rotating shaft 11 may be integrally molded with the base 12. With the above, the cylindrical member 10 is configured to be rotatable. That is, it is configured such that the cylindrical member 10 rotates when the rotating shaft 11 rotates. The notch portion 14 is formed in a manner of opening in the upper surface 12a. Moreover, the notch part 14 is formed in the upper part of the outer peripheral surface 12c so that it may open in the outer peripheral surface 12c. The upper portion of the outer circumferential surface 12c refers to the portion of the outer circumferential surface 12c closer to the upper surface 12a than the bottom surface 12b. In addition, the notch 14 is formed to open to the shaft hole 13. Furthermore, the cutout portion 14 may not be formed so as to open to the shaft hole 13. In addition, the notch portion 14 may be formed in a manner of opening in either the upper surface 12a or the bottom surface 12b. In addition, the notch portion 14 may also be formed in a manner of opening in the upper surface 12a and the bottom surface 12b. The blade member 20 is inserted into the notch 14. In this embodiment, the blade member 20 is inserted into the notch 14 from the opening of the upper surface 12a. The shape of the cutout portion 14 is formed in a shape such that the blade member 20 can be fitted and not separated in the radial direction of the rotating shaft 11. The notch 14 fixes the blade member 20 in the radial direction of the rotating shaft 11. On the other hand, the notch portion 14 allows the movement of the blade member 20 in the axial direction G of the rotating shaft 11. That is, the tube member 10 is configured to be able to detach the blade member 20. Thereby, when the blade member 20 needs maintenance due to wear or the like, the blade member 20 can be easily removed and replaced. (Configuration of Blade Member) As shown in FIGS. 1 and 3, the blade member 20 has a blade member body 21 and a core wire 25. In addition, in FIG. 1(a), the description of the core wire 25 is omitted. In FIG. 1(b), the description of the plurality of convex portions 24 of the blade member body 21 is omitted. The blade member main body 21 of this embodiment has a base 22, a main body 23, and a plurality of convex portions 24. Furthermore, in FIG. 3(b), the boundary lines of the base 22, the main body 23, and the plurality of convex parts 24 are indicated by broken lines. In the blade member body 21, the base portion 22, the body portion 23, and the plurality of convex portions 24 may be integrally formed. The blade member body 21 is formed of a thermosetting polyurethane elastomer. Thermosetting polyurethane elastomer has excellent abrasion resistance and elasticity. As shown in Figs. 1 and 3(a), the base 22 is formed at the end of the main body 23 on the side of the rotating shaft 11 (refer to Fig. 1). The base 22 is formed to bulge from the main body 23 such that the thickness of the rotating shaft 11 in the circumferential direction R increases. A part of the base 22 and the main body 23 is inserted into the notch 14 and fitted. In the present embodiment, the base 22 is formed so as to be substantially semicircular in a cross section orthogonal to the axial direction G of the rotating shaft 11. The shape of the base 22 may not be substantially semicircular. The shape of the base portion 22 may be such that the blade member 20 does not detach from the notch portion 14 in the radial direction of the rotating shaft 11, for example, a concave-convex shape. The main body 23 is formed in a substantially rectangular parallelepiped shape. In this embodiment, the main body 23 is formed such that the length La of the rotating shaft 11 in the radial direction is greater than the length Lc of the rotating shaft 11 in the axial direction G. The main body 23 is formed in such a way that the length Lc of the axis G of the rotating shaft 11 is greater than the length Lb of the circumferential direction R of the rotating shaft 11. The plurality of convex portions 24 is not necessary, and is preferably formed on any one or both surfaces of the surface of the main body portion 23 facing the circumferential direction R of the rotating shaft 11. The surface of the main body portion 23 and/or the surface of the plurality of convex portions 24 are the surfaces in contact with the paper. The number of convex portions 24 is not limited to the number shown in FIG. 3. Since the convex portion 24 is provided on the surface of the main body portion 23, the main body portion 23 is easy to bend when it comes into contact with the paper. In addition, the frictional locking force between the main body portion 23 and the paper is improved, and the sliding of the main body 23 and the paper is better. Less, good transportation can be carried out. The thermosetting polyurethane elastic system forming the blade member body 21 is obtained by thermosetting a prepolymer obtained from a polyol and a polyisocyanate and a hardener. Alternatively, it can be obtained by thermally curing polyol, polyisocyanate, and curing agent. The thermosetting polyurethane elastomer is preferably formulated so that the molar equivalent ratio, that is, the NCO index value (isocyanate group/active hydrogen group) is in the range of 0.8 to 1.0. The isocyanate group is the isocyanate group of the prepolymer or polyisocyanate. The active hydrogen group is the active hydrogen group of polyol and hardener, the active hydrogen group of polyol or the active hydrogen group of hardener. Polyols are not limited to those having two or more hydroxyl groups in the molecule. As the polyol, for example, polyether polyols, polyester polyols, polylactone-based polyester polyols, polycarbonate polyols, polyolefin polyols, etc. can be used alone or in combination of two or more. Used in combination. Polyether polyols include polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol, and the like. Here, polyester polyols are obtained by reacting a dicarboxylic acid compound and a polyol compound. The dicarboxylic acid compounds are adipic acid, sebacic acid, methylene succinic acid, maleic acid, terephthalic acid, isophthalic acid, fumaric acid, succinic acid, oxalic acid, malonic acid , Glutaric acid, pimelic acid, suberic acid, azelaic acid, etc. Polyol compounds are ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,2-propanediol, 1,3-propanediol, 1,9- Nonanediol, 3-methyl-1,5-pentanediol, tripropylene glycol, trimethylolpropane, glycerin, etc. Polylactone polyester polyols include polycaprolactone polyol, poly-β-methyl-δ-valerolactone, and the like. Polycarbonate polyols are obtained by reacting a diol compound and a carbonate compound. The diol compound is 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol, polyethylene glycol, polypropylene glycol, or polytetramethylene glycol. The carbonate compound is carbon chloride, dialkyl carbonate, or diphenyl carbonate. The polyolefin polyols are polybutadiene polyol, polyisoprene polyol and the like. Polyols are particularly preferably polyether polyols. The polyether thermosetting urethane formed from polyether polyols has better hydrolysis resistance than polyester polyurethane formed from polyester polyols, so even for a long time There is also less deterioration over time and excellent bending durability. In addition, a low molecular weight polyol may be used in combination with a polyol. Low molecular weight polyols are, for example, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 1 ,3-butanediol, 1,4-butanediol, neopentyl glycol (2,2-dimethyl-1,3-propanediol), 2-isopropyl-1,4-butanediol, 3 -Methyl-2,4-pentanediol, 2,4-pentanediol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 2-methyl-2,4- Pentylene glycol, 2,4-dimethyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,5-hexanediol, 1,6-hexanediol Alcohol, 2-ethyl-1,3-hexanediol, 2-ethyl-1,6-hexanediol, 1,7-heptanediol, 3,5-heptanediol, 1,8-octandiol Alcohol, 2-methyl-1,8-octanediol, 1,9-nonanediol, 1,10-decanediol and other aliphatic diols, cyclohexane dimethanol (for example, 1,4-cyclohexane Dimethanol), cyclohexanediol (for example, 1,3-cyclohexanediol, 1,4-cyclohexanediol), 2-bis(4-hydroxycyclohexyl)-propane and other alicyclic diols, trihydroxy Methyl ethane, trimethylolpropane, hexitols, pentitols, glycerin, polyglycerol, pentaerythritol, dipentaerythritol, tetramethylolpropane and other trivalent alcohols. Polyisocyanates can be, for example, aromatic isocyanates, aliphatic polyisocyanates, alicyclic polyisocyanates, carbodiimide modified polyisocyanates of the above-mentioned polyisocyanates, and isocyanurates of the above-mentioned polyisocyanates. Polyisocyanates, etc., are used individually by 1 type, or in combination of 2 or more types. Aromatic isocyanates are 2,4-toluene diisocyanate (2,4-TDI), 2,6-toluene diisocyanate (2,6-TDI), 4,4'-diphenylmethane diisocyanate (4,4' -MDI), 2,4'-diphenylmethane diisocyanate (2,4'-MDI), 1,4-phenylene diisocyanate, xylylene diisocyanate (XDI), tetramethylxylylene diisocyanate (TMXDI), polymethylene polyphenylene polyisocyanate, toluidine diisocyanate (TODI), 1,5-naphthalene diisocyanate (NDI), etc. Aliphatic polyisocyanates include hexamethylene diisocyanate (HDI), trimethyl hexamethylene diisocyanate (TMHDI), lysine diisocyanate, norene diisocyanate (NBDI). Alicyclic polyisocyanates are transcyclohexane-1,4-diisocyanate, isophorone diisocyanate (IPDI), hydrogenated xylylene diisocyanate (H6XDI, hydrogenated XDI), dicyclohexylmethane diisocyanate (H12MDI, hydrogenated MDI) and so on. The hardener can be a thermosetting polyurethane elastomer, which is usually used during molding. The types of active hydrogen groups of the curing agent are, for example, hydroxyl groups, amino groups, imino groups, carboxyl groups, urethane groups, thiol groups, epoxy groups, and the like. Specifically, 4,4'-methylenebis(o-chloroaniline) (MOCA), 4,4'-methylenedianiline (MDA), etc. can be used as a hardener. Furthermore, additives such as plasticizers, colorants, antioxidants, fillers, hydrolysis inhibitors, reaction accelerators, mold release agents, flame retardants, etc. may be formulated into the thermosetting polyurethane elastomer as needed. Among them, it is preferable that no plasticizer is added to the thermosetting polyurethane elastomer used in the blade member main body 21 of this embodiment. In this embodiment, as shown in FIG. 1(b) and FIG. 3(a), a part of the core wire 25 is embedded in the body portion 23 of the blade member body 21. The remaining part of the core wire 25 can also be exposed to the outside. Furthermore, the core wires 25 may also be all buried in the inside of the blade member body 21. In this embodiment, the core wires 25 are arranged side by side along the axial direction G of the rotating shaft 11 and a plurality of core wires 25 are embedded. Furthermore, as shown in FIG. 3(b), it is preferable that the core wires 25 are arranged side by side in the axial direction G of the rotating shaft 11 so that the distance Ld between adjacent core wires 25 is in the range of 0.25 to 0.50 mm. One. Furthermore, the distance Ld between adjacent core wires 25 is more preferably in the range of 0.25 to 0.30 mm. The core 25 contains polyester fiber. The core yarn 25 may be a twisted yarn of polyester fiber or a non-twisted yarn including a single filament. Polyester fiber has excellent heat resistance and strength. That is, by embedding the core wire 25 containing polyester fiber in the blade member 20, the bending durability of the blade member 20 against damage is improved. The fineness of the core wire 25 is preferably in the range of 100 to 300 deniers. Furthermore, the core wire diameter is preferably in the range of 0.10 to 0.19 mm. Furthermore, the core yarn 25 is preferably a twisted yarn with a fineness of 120 to 180 deniers. Furthermore, the core yarn may include fibers other than polyester fibers. The blade member 20 is preferably shaped such that the radial length of the rotating shaft 11 is 15-50 mm, the length (width) of the axial G of the rotating shaft 11 is 2-10 mm, and the length (thickness) in the circumferential direction of the rotating shaft 11 ) Is about 1 to 4 mm. (Method of manufacturing blade member) Next, a method of manufacturing the blade member 20 will be described. The blade member 20 can be manufactured by casting using a cylindrical mold including a double-layer cylindrical mold or a flat mold as a split mold. First, the method of manufacturing the blade member 20 in the case of using a cylindrical mold will be described. The cylindrical mold is a double-layer cylindrical mold including an inner cylindrical mold and an outer cylindrical mold. The inner cylindrical mold is configured to be able to be arranged inside the outer cylindrical mold. In addition, on the outer peripheral surface of the inner cylindrical mold, a recess forming a base 22 and a plurality of convex parts 24 is formed. (1) The core wire 25 is wound on the outer peripheral surface of the inner cylindrical mold. At this time, the core wire 25 is wound so that the interval between the adjacent core wires 25 becomes a specific interval. (2) Insert the inner cylindrical mold into the outer cylindrical mold and arrange it so as to be substantially concentric. (3) In the space formed between the inner cylindrical mold and the outer cylindrical mold, a liquid material forming the blade member body 21 is cast. Then, the liquid material is heated to thermally harden it to form a base 22, a main body 23, and a plurality of protrusions 24 including polyurethane elastomer. (4) The cylindrical blade member precursor obtained by demolding from the cylindrical mold is cut to obtain the blade member 20. Next, a method of manufacturing the blade member 20 when a flat mold is used will be described. The flat mold is a split mold of the first flat mold and the second flat mold. (1) The core wires 25 are fixedly arranged on the first flat mold in a state where a plurality of core wires are arranged in parallel. At this time, the core wires 25 are arranged such that the interval between adjacent core wires 25 becomes a specific interval. (2) The second flat mold is aligned with the first flat mold to which the core wire 25 is fixed. (3) The liquid material forming the blade member body 21 is cast in the flat mold. Then, the liquid material is heated to thermally harden it to form a base 22, a main body 23, and a plurality of protrusions 24 including polyurethane elastomer. (4) Demolding from the flat mold to obtain the blade member 20. In addition, in the manufacturing method using a flat mold, the blade members 20 may be formed piece by piece, or an assembly of a plurality of blade members 20 may be formed. In this case, the plate mold is a size that can form an assembly of a plurality of blade members 20. Then, by cutting the formed assembly into a specific size, a plurality of blade members 20 are obtained. The blade member 20 of the impeller 1 for paper conveyance of this embodiment has the following characteristics. The blade member 20 of the impeller 1 for paper conveyance is arrange|positioned so that it may protrude from the outer peripheral surface of the cylindrical member 10 in the radial direction orthogonal to the axial direction G of the rotating shaft 11 of the cylindrical member 10 which can rotate. In addition, the blade member 20 of the impeller 1 for conveyance of paper sheets is brought into contact with and conveyed. Furthermore, the blade member 20 of the impeller 1 for paper conveyance includes a blade member body 21 and a core wire 25. The blade member body 21 contains a thermosetting polyurethane elastomer. The core 25 contains polyester fiber. At least a part of the core wire 25 is embedded in the blade member body 21 along the radial direction of the rotating shaft 11. A plurality of core wires 25 are arranged side by side in the axial direction G of the rotating shaft 11 of the cylindrical member 10. Regarding the blade member body 21, from the standpoint of restorability, an elastomer material with excellent elasticity is preferred. Among the elastomer materials, especially thermosetting polyurethane elastomers are excellent in wear resistance and elasticity. . In addition, the polyester fiber forming the core 25 has excellent heat resistance and strength. Regarding the core wire 25, from the viewpoint of bending durability, polyester fibers, aromatic polyamide fibers, and nylon fibers are preferred, and polyester fibers that are not easily buckled due to plastic deformation are particularly suitable. Since the blade member body 21 contains a thermosetting polyurethane elastomer and the core wire 25 contains polyester, the deformation force (compression force) generated in the core wire 25 during bending can be reduced, and the blade member 20 is durable in bending Improved sex and resilience. That is, the blade member 20 of the impeller 1 for paper conveyance can suppress plastic deformation, and can improve bending durability and restorability. Moreover, in the blade member 20 of the impeller 1 for paper conveyance of this embodiment, the fineness of the core 25 is preferably in the range of 100 to 300 deniers. In this case, the diameter of the core wire 25 is preferably in the range of 0.10 to 0.19 mmm. Furthermore, the fineness of the core wire 25 is more preferably in the range of 120 to 180 deniers. That is, the diameter of the core wire 25 is relatively thin. When the diameter of the core wire 25 is thicker, compared with the case where the diameter of the core wire 25 is thinner, the deformation force (compression force) inside the core wire 25 (especially near the outer periphery) becomes larger when the core wire 25 is bent, which tends to cause buckling, fracture. Therefore, by making the diameter of the core wire 25 relatively thin, the deformation force (compression force) generated inside the core wire 25 during bending can be reduced, and the bending durability and resilience can be improved. That is, the blade member 20 of the impeller 1 for paper conveyance of this structure can suppress plastic deformation, and can further improve bending durability and restorability. In addition, in the blade member 20 of the impeller 1 for paper transport of the present embodiment, the blade member body 21 preferably contains a thermosetting polyurethane elastomer containing a plasticizer, and is relatively thermally curable. 100 parts by weight of polyurethane elastomer, and 20 parts by weight or less of plasticizer. In addition, the blade member body 21 is more preferably composed of a thermosetting polyurethane elastomer containing a plasticizer, and the plasticizer is 5 parts per 100 parts by weight of the thermosetting polyurethane elastomer. Parts by mass or less. Furthermore, it is preferable that the blade member main body 21 contains a thermosetting polyurethane elastomer which does not contain a plasticizer. Here, if the blade member main body 21 contains a large amount of plasticizer, the plasticizer will ooze out and transfer to the surface of the paper during the process of repeated contact between the blade member main body 21 and the paper during long-term use. Therefore, the blade member body 21 that is in contact with the paper is plastically deformed, and the blade member 20 is warped. Therefore, by reducing the plasticizer contained in the blade member body 21 or eliminating the plasticizer in the blade member body 21, the warpage of the blade member 20 is relatively reduced, and the resilience is improved. That is, the blade member 20 of the impeller 1 for paper conveyance of this structure can suppress plastic deformation, and can further improve bending durability and restorability. In addition, the term "thermosetting polyurethane elastomer does not contain a plasticizer" means that the thermosetting polyurethane elastomer contains substantially no plasticizer. The so-called "substantially free" here means that inclusion in the form of impurities is permitted but not intentionally added. In addition, in the blade member 20 of the impeller 1 for paper conveyance of this embodiment, the core wires 25 are preferably arranged side by side in the axial direction of the rotating shaft 11 so that the interval between adjacent core wires 25 is in the range of 0.25 to 0.50 mm And there are a plurality of arrangements. Furthermore, it is more preferable that the core wires 25 are arranged side by side in the axial direction of the rotating shaft 11 so that the interval between adjacent core wires 25 is within the range of 0.25 to 0.30 mm. When the distance between adjacent core wires 25 is less than 0.25 mm, the number of core wires 25 embedded in the blade member body 21 increases. Moreover, the rigidity of the blade member 20 becomes greater, resulting in a decrease in the flexibility of the blade member 20. In addition, when the distance between adjacent core wires 25 exceeds 0.50 mm (especially 0.30 mm), the number of core wires 25 embedded in the blade member body 21 decreases. Furthermore, there is a possibility that the deformation force generated inside the core wire 25 during bending cannot be sufficiently reduced. Therefore, if the interval between adjacent core wires 25 is in the range of 0.25 to 0.50 mm (especially in the range of 0.25 to 0.30 mm), the bending property of the blade member 20 can be maintained appropriately. That is, the blade member 20 of the impeller 1 for paper conveyance of this structure can suppress plastic deformation, and can further improve bending durability and restorability. Above, the embodiments of the present invention have been described based on the drawings, but it should be understood that the specific configuration is not limited to these embodiments and examples. The scope of the present invention is not only the description of the above-mentioned embodiments and examples, but is disclosed by the scope of the patent application, and further includes the meaning equivalent to the scope of the patent application and all changes within the scope. Furthermore, in the above-mentioned embodiment, the blade member 20 is provided so as to protrude linearly from the outer peripheral surface of the cylindrical member 10 in a radial direction orthogonal to the axial direction G of the rotating shaft 11 of the cylindrical member 10. However, the configuration of the blade member 20 is not limited to this. For example, it may be a blade member having a shape curved in the above-mentioned radial direction. Alternatively, the blade member 20 may be inclined at a specific angle with respect to the above-mentioned radial direction. Here, the specific angle is set arbitrarily in the range of 0° to 90°, for example. In the case of a blade member that is inclined at a specific angle with respect to the above-mentioned radial direction, an angle can be set in the cut portion of the cylindrical member, or the body portion of the blade member body can have a bending point. When the body portion of the blade member body has a bending point, the position of the bending point may be, for example, near the junction with the base. In the present invention, the number of blade members 20 is not limited to four. The number of blade members 20 may be one or more. In addition, the blade members 20 may not be arranged at equal intervals in the circumferential direction R of the rotation axis of the cylindrical member 10. In the present invention, the cylindrical member 10 is not limited to a substantially cylindrical shape. The cylindrical member 10 may be formed in a substantially polygonal shape. The cylindrical member 10 may not have the shaft hole 13 for inserting the rotating shaft 11. That is, the cylindrical member 10 may integrally mold the rotating shaft 11 and the base 12. In the present invention, the cutout portion 14 may not be formed in a way that it opens to the shaft hole 13. In addition, the notch portion 14 may be formed in a manner of opening in either the upper surface 12a or the bottom surface 12b. In addition, the notch portion 14 may also be formed in a manner of opening in the upper surface 12a and the bottom surface 12b. In the present invention, the shape of the base 22 may not be substantially semicircular. The shape of the base 22 may be such that the blade member 20 does not detach from the notch 14 in the radial direction of the rotating shaft 11. The shape of the base 22 may be, for example, a concave-convex shape. In the present invention, a part of the core wire 25 only needs to be buried inside the blade member body 21, and the remaining part may be exposed to the outside. The core wire 25 can also be all buried in the inside of the blade member body 21. [Examples] Next, examples of the present invention will be described. In this example, 15 blade members 20 of the impeller for paper conveyance of Examples 1-15 and 9 blade members of the impeller for paper conveyance 120 of Comparative Examples 1 to 9 were produced. In addition, in the blade member 20 of the impeller for paper conveyance of Examples 1-9 and the blade member 120 of the impeller for paper conveyance of Comparative Examples 1-8, the following polyurethane raw material composition was used as the blade forming blade The liquid polyurethane raw material composition of the blade member body 21 of the member 20, the polyurethane raw material composition will be blended in 100 parts by mass of the polyether urethane prepolymer 20 parts by mass of dioctyl phthalate (DOP) as a plasticizer and stirred and mixed at 60°C as a liquid raw material, and 3,3'-dichloro-4,4 as a hardener '-Diaminodiphenylmethane (MOCA) 10 mass parts of liquid raw materials dissolved at 120°C are stirred and mixed. In the blade member 20 of the impeller for paper conveyance of Examples 10, 11, and 12, the blending amount of the plasticizer used in the blade member 20 of the impeller for paper conveyance of Example 1 is 20 parts by mass. The urethane raw material composition uses the polyurethane raw material composition of 10, 5, or 0 parts by mass of the plasticizer. In the blade member 20 of the impeller for paper conveyance of Examples 13, 14, and 15, the plasticizer used in the blade member 20 of the impeller for paper conveyance of Examples 2, 3, and 5 is 20. For the polyurethane raw material composition in parts by mass, the polyurethane raw material composition without plasticizer (0 parts by mass) was used. In the blade member 120 of the impeller for paper conveyance of Comparative Example 9, the hydrogenated nitrile rubber (H-NBR) 100 parts by weight added sulfur 0.5 parts by weight, as a plasticizer, dioctyl phthalate (DOP) ) An unvulcanized rubber sheet formed by mixing 20 parts by mass and a vulcanization accelerator with rubber. The blade member 20 of the impeller for paper conveyance of the embodiment and the blade member 120 of the impeller for paper conveyance of the comparative example are different from the above embodiment except that the material and fineness of the core wire 25 and the distance between adjacent core wires are changed. The blade member 20 of the impeller for paper conveyance has the same structure. Moreover, the blade member 20 of the impeller for paper conveyance of the Example and the blade member 120 of the impeller for paper conveyance of the comparative example are manufactured using the cylindrical mold containing a double-layer cylindrical mold. The manufacturing procedure of the blade member 20 of the impeller for paper conveyance of the Example and the blade member 120 of the impeller for paper conveyance of Comparative Examples 1-8 is as follows. (1) The core wire 25 is wound spirally on the outer peripheral surface of the inner cylindrical mold so that the distance between the adjacent core wire 25 becomes a specific interval. Let the interval between adjacent core wires 25 be the distance between core wires. (2) Insert the inner cylindrical mold into the outer cylindrical mold. (3) Cast the polyurethane raw material composition in the cavity of the mold, and heat-harden it at 115°C for 25 minutes. (4) After demolding from the mold, perform an aging treatment at 70°C for 12 hours to obtain a cylindrical blade member precursor. (5) Cut the cylindrical blade member precursor in the direction along the core 25 with a width of 3 mm. Then, it was further cut to a length of 20 mm in the direction orthogonal to the core wire 25 to obtain a blade member of an impeller for paper conveyance. (6) The obtained blade members 20 and 120 are mounted on the cylindrical member 10 made of polyacetal to form the impeller 1 for paper conveyance. In addition, the manufacturing procedure of the blade member 120 of the impeller for paper conveyance of the comparative example 9 is the procedure which replaced the procedure of (2)-(4) of the above-mentioned procedure (1)-(6) with the following procedure. (2a) After winding the unvulcanized rubber sheet on the core wire, it is placed inside the cylindrical sleeve of the vulcanizing device where the outer cylindrical mold is placed. (3a) Put it into a vulcanizing tank and apply pressure and heat with a vulcanizing device to vulcanize to form a cylindrical blade member precursor. (4a) After demolding from the mold, a cylindrical blade member precursor is obtained. The material and fineness of the core wire 25 of the blade member 20 of the impeller for paper conveyance of the Example and the blade member 120 of the impeller for paper conveyance of the comparative example were changed as follows. Table 1 summarizes the material and fineness of the blade member 20 of the impeller for conveyance of paper sheets in the embodiment. Table 2 summarizes the material and fineness of the core wire 25 of the blade member 120 of the impeller for paper conveyance of the comparative example. Examples 1, 4, 5, 8-12, 15, Comparative Example 9: Polyester fiber (PET, 60 counts, 150 denier) Example 2, 13: Polyester fiber (PET, 90 count, 100 denier) Examples 3 and 14: Polyester fiber (PET, 40 counts, 300 denier) Example 6: Polyester fiber (PET, 100 counts, 90 denier) Example 7: Polyester fiber (PET, 30 counts, 450 Danny) Comparative example 1: Nylon fiber (66 nylon, 60 denier, 150 denier) Comparative example 2: Nylon fiber (66 nylon, 50 denier, 210 denier) Comparative example 3: Nylon fiber (66 nylon, 40 denier, 300 denier) Comparative Example 4: Aromatic polyamide fiber (66 nylon, 30, 450 denier) Comparative Example 5: Aromatic polyamide fiber (para-based aromatic polyamide, 60, 150 denier) Nepal) Comparative Examples 6 and 8: Aromatic polyamide fibers (para-based aromatic polyamide, 45 branches, 200 deniers) Comparative Example 7: Aromatic polyamide fibers (para-based aromatic polyamide , 30 pieces, 450 deniers) The distance between the core wires 25 of the blade member 20 of the impeller for paper conveyance of the example and the blade member 120 of the impeller for paper conveyance of the comparative example was changed as follows. Table 1 summarizes the distances between the core wires 25 of the blade members 20 of the impeller for conveyance of paper sheets of the embodiment. Table 2 summarizes the distance between the core wires 25 of the blade member 120 of the impeller for paper conveyance in the comparative example. Furthermore, the so-called distance between core wires 25 refers to the distance between adjacent core wires 25 as described above. Examples 1 to 3, 6, Comparative Examples 1 to 3, 5, 6, 9: 0.3 mm Example 4: 0.25 mm Examples 5, 7, Comparative Example 4, 7: 0.5 mm Example 8, Comparative Example 8: 0.2 mm Example 9: 0.7 mm [Table 1]

[Table 2]

As shown in Tables 1 and 2, in Examples 1-9, the combination of the material of the body and the material of the core wire is a combination of "polyurethane + polyester". In Comparative Examples 1 to 4, the combination of the material of the main body and the material of the core wire is a combination of "urethane + nylon". In Comparative Examples 5-8, the combination of the material of the body and the material of the core wire is a combination of "urethane + aromatic polyamide". In Comparative Example 9, the combination of the material of the main body and the material of the core wire is "hydrogenated nitrile rubber + polyester". Moreover, the blade member 20 of the impeller for paper conveyance of the Example and the blade member 120 of the impeller for paper conveyance of a comparative example were subjected to a bending durability test and a restoration test. The bending durability test was performed on the blade member 20 of the impeller for paper conveyance of Examples 1-9 and the blade member 120 of the impeller for paper conveyance of Comparative Examples 1-9. In the bending durability test, the test device 30 shown in FIG. 4 was used. The test device 30 for the bending durability test connects the motor 31 and the sliding base surface 32 of the stainless steel plate via a rod 33. The test device 30 for the bending durability test is constructed by rotating the motor 31 to make the sliding base surface 32 mounted on the rod 33 move back and forth in the sequence of the arrow direction in Fig. 4(a) and Fig. 4(b). Furthermore, the blade member 20 of the impeller for paper conveyance of the Example and the blade member 120 of the impeller for paper conveyance of a comparative example are attached to the fixing member 35. The blade member 20 of the impeller for paper conveyance of the embodiment and the blade member 120 of the impeller for paper conveyance of the comparative example are in contact with the sliding base surface 32, and the sliding base surface 32 moves back and forth according to FIG. 4(a ) And the direction of the arrow in Figure 4(b). Using this test device 30, for the blade member 20 of the impeller for paper transport of Examples 1-9 and the blade member 120 of the impeller for paper transport of Comparative Examples 1-9, one round trip was regarded as one bending, and 300 The reciprocating motion is performed at the speed of one bending/minute. Furthermore, the blade member 20 of the impeller for paper conveyance of the example and the blade member 120 of the impeller for paper conveyance of the comparative example at the time of about 70,000 bends and after about 1.7 million bends were judged for breakage and plastic deformation. Table 1 shows the test results of the bending durability test of the blade member 20 of the impeller for paper conveyance of Examples 1-9. Table 2 shows the test results of the bending durability test of the blade member 120 of the impeller for paper transport of Comparative Examples 1-9. Furthermore, in the bending durability test, the paper conveyance is judged based on the ratio of the reduction in the length of the blade members of the impeller for paper conveyance and the state of plastic deformation of the blade members of the impeller for paper conveyance as bending or bending. Whether the blade components of the impeller have plastic deformation. In the bending durability test, the length L11 from the center of the cylindrical member 10 in the radial direction orthogonal to the axial direction G of the rotating shaft 11 to the front end of the blade member 20 of the cylindrical member 10 before the bending durability test was measured, and the bending The apparent length L12 from the center of the cylindrical member 10 in the radial direction orthogonal to the axial direction of the rotating shaft 11 to the front end of the blade member 20 of the cylindrical member 10 after the durability test. Furthermore, the ratio of the difference between the lengths of L11 and L12 was measured as the ratio of the length reduction of the blade member. Moreover, when the length of the blade member of the impeller for paper conveyance does not decrease, it is judged that there is no plastic deformation. When the length of the blade member of the impeller for paper transport is reduced by less than 2% and the state of plastic deformation is curved, the degree of plastic deformation of the blade member of the impeller for paper transport is judged as A. When the length of the blade member of the impeller for paper transportation is reduced by less than 2% and the state of plastic deformation is bent, the degree of plastic deformation of the blade member of the impeller for paper transportation is judged as B. When the length of the blade member of the impeller for paper transport is reduced by more than 2% and the state of plastic deformation is bent or bent, the degree of plastic deformation of the blade member of the impeller for paper transport is judged as C. In addition, the overall evaluation of the bending durability of the blade members of the impeller for paper transport is determined as follows. When the blade member of the impeller for paper conveyance is not damaged or plastically deformed, it is regarded as ◎. When the blade member of the impeller for paper conveyance is not damaged but there is a slight plastic deformation, it is regarded as ○. When the blade member of the impeller for paper conveyance is damaged but there is no problem in practical use, it is regarded as △. When the blade member of the impeller for paper transportation is damaged and it is damaged that cannot be used practically, it is regarded as ×. As shown in Tables 1 and 2, the combination of the material of the main body and the material of the core wire is a combination of "polyurethane + polyester". The blade member 20 of the impeller for paper conveyance in Examples 1-9 is comprehensively evaluated. It is ◎, ○, △. In addition, the combination of the material of the main body and the material of the core wire is a combination other than "polyurethane + polyester". The blade member 120 of the impeller for paper conveyance of Comparative Examples 1 to 9 is comprehensively evaluated as ×. That is, it can be confirmed that the combination of the material of the main body and the material of the core is the combination of "polyurethane + polyester". Comparative example 1 of the blade member 20 of the impeller for paper conveyance of Examples 1-9 and other combinations. Compared with the blade member 120 of the impeller for paper conveyance of ~9, the bending durability is more excellent. In addition, in the blade member 20 of the impeller for paper conveyance of Examples 1-9, the fineness of the core wire was changed to compare the advantages and disadvantages. Comparing the blade members 20 of the impeller for paper conveyance in Examples 1, 2, 3, 6, and 7 in which the fineness of the core wire was changed, it was confirmed that the fineness was in the range of 100 to 300 deniers in Examples 1 and 2 The overall evaluation of the blade member 20 of the impeller for paper conveyance of 3 and 3 is ⊚ or ○, which is more excellent in bending durability than the blade member 20 of the impeller for paper conveyance of Examples 6 and 7. Regarding the blade member 20 of the impeller for paper conveyance of Example 6, it is considered that the core wire has a fineness of 90 deniers and is extremely thin, so the blade member 20 cannot maintain the rigidity and is easily damaged, and the tip is slightly broken. Regarding the blade member 20 of the paper conveyance impeller of Example 7, it is considered that since the core wire has a fineness of 450 deniers and is relatively thick, the deformation force inside the core wire during bending is relatively large, and the core wire is buckled. Furthermore, regarding the blade member 20 of the impeller for conveyance of paper sheets of Example 7, the core wires cannot be arranged at 0.3 mm pitch because the core wires are thick, so the core wires are set to 0.5 mm pitch. That is, it can be confirmed that if the fineness of the core wire of the blade member is reduced, breakage and plastic deformation are further suppressed. In addition, in the blade member 20 of the impeller for conveying paper sheets of Examples 1-9, the distance between the core wires was changed to compare the advantages and disadvantages. Comparing the blade members 20 of the impeller for paper conveyance of Examples 1, 4, 5, 8, and 9 in which the pitch between the core wires is changed, it can be confirmed that the pitch is in the range of 0.25 to 0.50 mm in Examples 1, 4, and 9 The overall evaluation of the blade member 20 of the impeller for paper conveyance of 5 is ⊚ or ○, which is more excellent in bending durability than the blade member 20 of the impeller for paper conveyance of Examples 8 and 9. Regarding the blade member 20 of the impeller for conveyance of paper sheets of Example 8, it can be considered that the pitch between the core wires is 0.2 mm and the core wire becomes dense, and the bending property of the blade member is reduced, so that the core wire is buckled. Regarding the blade member 20 of the impeller for paper conveyance of Example 9, it is considered that the distance between the core wires is 0.7 mm and the blade member 20 becomes wider, so the rigidity of the blade member cannot be maintained, and the blade member is easily damaged, and the tip is slightly broken. That is, it can be confirmed that if the distance between the core wires of the blade member is reduced, breakage and plastic deformation are further suppressed. In the recovery test, change the amount of plasticizer added to confirm the difference in recovery. The restoration test was performed on the blade member 20 of the impeller for conveyance of paper sheets in each of Examples 1, 2, 3, 5, and 10-15. In the recovery test, the test device 40 shown in Fig. 5(a) was used. The test device 40 for the recovery test is constructed with a motor (not shown). The test device 40 for the restoration test is mounted on a cylindrical member 10 rotatably mounted on a motor, and is equipped with four blade members 20 of the impellers for conveying paper sheets of Example 1 and Example 3. In the resilience test, the impeller 1 for conveying paper sheets in each of Examples 1, 2, 3, 5, and 10-15 was rotated at 1000 rpm, and the paper sheets of Examples 1, 2, 3, 5, and 10-15 were rotated at 1000 rpm. The blade member 20 of the impeller for conveyance is continuously in contact with the plain paper 41. Fig. 5(b) is a schematic diagram showing the shape of the blade member 20 before the restoration test, and Fig. 5(c) is a schematic diagram showing the shape of the blade member 20 after the restoration test. In the restoration test, the length L1 from the center of the cylindrical member 10 in the radial direction orthogonal to the axial direction G of the rotating shaft 11 to the front end of the blade member 20 of the cylindrical member 10 before the restoration test was measured, and the restoration test The apparent length L2 from the center of the cylindrical member 10 in the radial direction orthogonal to the axial direction of the rotating shaft 11 of the subsequent cylindrical member 10 to the front end of the blade member 20. Furthermore, the ratio of the difference between the lengths of L1 and L2 was measured as the reduction rate of the leading end of the blade member (hereinafter referred to as "the reduction rate of the leading end of the blade member"). Table 3 shows the reduction rate of the tip of the blade member in the restorability test performed for Examples 1, 2, 3, 5, and 10-15. In addition, Table 3 shows the test results of the bending durability test and the recovery test. [table 3]

Moreover, the test result of the restorability test of the blade member 20 of the impeller for paper conveyance of Example 1 and Example 12 is shown in FIG. Here, the so-called stroke number shown in FIG. 6 refers to the number of times the blade member 20 is in contact with plain paper. In Fig. 6, the average value of 4 blade members is depicted as the reduction rate of the tip of the blade member. As shown in Figure 6, as the number of strokes increases, the reduction rate of the tip of the blade member continues to increase. The reason is that due to the wear of the front end of the blade member 20, the initially straight blade member 20 is bent in one direction and plastically deformed (bending deformation) into an arch shape, and the bending deformation gradually becomes larger. Here, the increase in resilience refers to the increase in the force to return to the original straight shape after bending and deformation. That is, the difference in the length of the blade member 20 before the restoration test and after the test becomes smaller. Therefore, according to the test results of the restorability test shown in FIG. 6, it can be seen that the tip reduction rate of the blade member 20 without plasticizer added in Example 12 is different from that of the blade member 20 with plasticizer added in Example 1 small. From the above, it can be confirmed that the blade member 20 without plasticizer added in Example 12 has an improved restoring force compared to the blade member 20 in Example 1. As shown in Table 3, the measured reduction rate of the tip of the blade member at 50 million strokes for each example is 2.3% for the blade member 20 of the impeller for paper conveyance in Example 1. In contrast, Example 10 The blade member 20 of the impeller for paper transport is 1.9%, the blade member 20 of the impeller for paper transport of Example 11 is 1.7%, and the blade member 20 of the impeller for paper transport of Example 12 is 1.4%. From this, it can be seen that as the plasticizer is reduced, the tip reduction rate decreases, and the restorability improves while maintaining the bending durability. Similarly, for the blade members 20 of the impellers for paper conveyance of Examples 2, 3, and 5 where the fineness or pitch of the core wires are different, the paper conveyances of Examples 13, 14, and 15 that do not contain plasticizer, respectively Comparing the blade members 20 of the impeller, it can be seen that the reduction rate of the front end is reduced, and the recovery is improved. It can be seen from the above that, according to the examples and comparative examples of the present invention, the blade body of the blade member of the impeller for paper conveyance has a thermosetting polyurethane compared to hydrogenated nitrile rubber (H-NBR). In the case of ester elastomer, it is not easy to be plastically deformed and can improve bending durability. Moreover, when the blade member body of the blade member of the impeller for paper conveyance contains a thermosetting polyurethane elastomer, the following is known. It can be seen that if the core wire of the blade member is polyester fiber instead of nylon fiber or aromatic polyamide fiber, the bending durability can be improved. In addition, with regard to the distance between the core wires of the blade member, it can be seen that compared with 0.2 mm or 0.7 mm, the case of 0.25 mm, 0.3 mm or 0.5 mm is less prone to plastic deformation, and the bending durability can be improved. Furthermore, regarding the distance between the core wires of the blade member, it can be seen that the case of 0.25 mm or 0.3 mm is less likely to be plastically deformed than 0.5 mm, and the bending durability can be improved. In addition, regarding the fineness of the core wire of the blade member, compared with 90 deniers or 450 deniers, 100 deniers, 150 deniers, and 300 deniers are less likely to be plastically deformed, and the bending durability can be improved. Furthermore, regarding the fineness of the core wire of the blade member, it can be seen that the case of 150 deniers is less likely to be plastically deformed than 100 deniers or 300 deniers, and the bending durability can be improved. It is also known that the body of the blade member may also contain a plasticizer in the thermosetting polyurethane elastomer, but the upper limit is preferably relative to 100 parts by weight of the thermosetting polyurethane elastomer It is 20 parts by mass. Furthermore, it can be seen that when no plasticizer is contained in the thermosetting polyurethane elastomer, the restoring force of the blade member body is improved. Therefore, it can be seen that if the blade member of the impeller for paper conveyance is made of thermosetting polyurethane elastomer without plasticizer and the core of the blade member is polyester fiber, plastic deformation can be suppressed and improved Bending durability. Furthermore, in order to further improve the bending durability, as long as the fineness of the core wire is in the range of 100 to 300 deniers (more preferably the range of 120 to 180 deniers) and the distance between the core wires is in the range of 0.25 to 0.50 mm (more preferably, 0.25 ～0.30 mm range). This application is based on the Japanese patent application 2016-232864 filed on November 30, 2016 and the Japanese patent application 2017-226925 filed on November 27, 2017, the contents of which are incorporated herein by reference. [Industrial Applicability] According to the present invention, it is possible to provide a blade member of an impeller for paper conveyance that suppresses plastic deformation and improves bending durability.

1‧‧‧Paper conveying impeller 10‧‧‧Cylinder member 11‧‧‧Rotating shaft 12‧‧‧Base 12a‧‧‧Upper surface 12b‧‧‧Bottom surface 12c‧‧‧Outer peripheral surface 13‧‧‧Shaft hole 14 ‧‧‧Cut part 20‧‧‧Blade member 21‧‧‧Blade member body 22‧‧‧Base 23‧‧‧Body part 24‧‧‧Protrusion 25‧‧‧Core wire 30‧‧‧Test of bending durability test Device 31 ‧ ‧ Motor 32 ‧ ‧ Sliding base surface 33 ‧ ‧ Rod 35 ‧ ‧ Fixed member 40 ‧ ‧ Test device for restoration test 41 ‧ ‧ Plain paper 120 ‧ ‧ Blade member G ‧ ‧ The axial direction of the rotating shaft of the cylindrical member L1‧‧‧length L2‧‧‧length La‧‧‧length Lb‧‧‧length Lc‧‧‧length Ld‧‧‧interval R‧‧‧circumferential direction

Fig. 1 is a diagram schematically showing an impeller for conveyance of paper sheets, (a) is a perspective view, and (b) is a plan view. Fig. 2 is a perspective view schematically showing the cylindrical member of the impeller for conveying paper sheets. Fig. 3 is a diagram schematically showing the blade member of the impeller for paper transport, (a) is a cross-sectional view of a part of the blade member in the radial direction of the rotating shaft, and (b) is the X-X cross-sectional view of (a). Figure 4 (a) and (b) are schematic diagrams schematically showing the test equipment used in the bending durability test. Fig. 5(a) to (c) are schematic diagrams schematically showing the restoration test. Figure 6 is a graph showing the test results of the recovery test.

1‧‧‧Paper conveying impeller

10‧‧‧Cylinder component

11‧‧‧Rotation axis

12a‧‧‧Upper surface

12b‧‧‧Bottom

12c‧‧‧Outer peripheral surface

20‧‧‧Blade components

21‧‧‧Blade component body

24‧‧‧Protrusion

25‧‧‧Core wire

La‧‧‧length

R‧‧‧Circumference direction

G‧‧‧The axial direction of the rotating shaft of the cylinder

Claims (7)

A blade member of an impeller for paper conveyance, in which at least one blade member is arranged so as to protrude from the outer peripheral surface of a rotatable cylindrical member, and the blade member is provided with a blade member body containing thermosetting polyurethane Ester elastomer; and a core wire comprising polyester fiber, at least a part of which is embedded in the inside of the blade member body, and a plurality of them are arranged side by side in the axial direction of the rotating shaft of the cylinder member; the blade member body contains no plastic Thermosetting polyurethane elastomer or plasticizer-containing thermosetting polyurethane elastomer, and relative to the above-mentioned thermosetting polyurethane elastomer 100 weight The above-mentioned plasticizer is 20 parts by mass or less; the fineness of the above-mentioned core wire is in the range of 100 to 300 deniers, and the above-mentioned core wire is placed on the above-mentioned rotating shaft so that the interval between adjacent core wires is in the range of 0.25-0.50 mm A plurality of the above-mentioned axial directions are arranged side by side. Such as the blade member of the impeller for paper conveyance in claim 1, wherein the fineness of the core wire is in the range of 120 to 180 deniers. The blade member of an impeller for paper conveyance according to claim 1, wherein the body of the blade member contains a thermosetting polyurethane elastomer that does not contain a plasticizer. The blade member of an impeller for paper conveyance according to claim 1, wherein the body of the blade member contains a thermosetting polyurethane elastomer containing no plasticizer or a thermosetting containing plasticizer Polyurethane elastomer, and the plasticizer is 5 parts by mass or less with respect to 100 parts by weight of the thermosetting polyurethane elastomer. For example, the blade member of the impeller for paper conveyance in claim 1, wherein the core wire is arranged in a row on the axial direction of the rotating shaft so that the interval between the adjacent core wires is in the range of 0.25 to 0.30 mm . Such as the blade member of the impeller for paper conveyance in any one of claims 1 to 5, wherein the core diameter of the core wire is 0.10~0.19mm. The blade member of an impeller for paper conveyance according to any one of claims 1 to 5, wherein the blade member protrudes from the outer peripheral surface of the cylindrical member in a radial direction orthogonal to the axial direction of the rotating shaft of the cylindrical member In this way, the core wire is buried along the radial direction of the rotation axis of the cylindrical member.

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