JP6094913B1 - Paper feeder - Google Patents

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JP6094913B1
JP6094913B1 JP2016022742A JP2016022742A JP6094913B1 JP 6094913 B1 JP6094913 B1 JP 6094913B1 JP 2016022742 A JP2016022742 A JP 2016022742A JP 2016022742 A JP2016022742 A JP 2016022742A JP 6094913 B1 JP6094913 B1 JP 6094913B1
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layer
roller
retard roller
retard
base material
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JP2017141082A (en
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照美 津田
照美 津田
武房 緒方
武房 緒方
宏 楠田
宏 楠田
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to US15/416,381 priority patent/US10179714B2/en
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Abstract

【課題】十分な耐摩耗性を有する単一の材料で構成しても、十分なニップ量を得ること。【解決手段】リタードローラ５（ローラ基材）は、ＥＰＤＭ（エチレンプロピレンジエンゴム）やポリウレタン等の合成ゴム（工業用ゴム材料）からなる。リタードローラのローラ基材５は、円筒形状を為す。リタードローラ５には、中心軸線Ｃに対して同心円状の第１層（最外層）から第Ｎ層（最内層）までのＮ個（Ｎは２以上の整数）の各層に、Ｍ個（Ｍは４以上の整数）の円弧状の長孔１２が形成される。各層におけるスポーク部１３が隣接層間（第ｉ層と第ｉ＋１層、ｉは１からＮ−１までの整数）において周方向に重ならないように、長孔１２が形成される。【選択図】図３A sufficient amount of nip can be obtained even if a single material having sufficient wear resistance is used. A retard roller (roller base material) is made of synthetic rubber (industrial rubber material) such as EPDM (ethylene propylene diene rubber) or polyurethane. The roller base material 5 of the retard roller has a cylindrical shape. The retard roller 5 has M (M) in each of N layers (N is an integer of 2 or more) from the first layer (outermost layer) to the Nth layer (innermost layer) concentric with respect to the central axis C. Is an arc-shaped slot 12 having an integer of 4 or more. The long holes 12 are formed so that the spoke portions 13 in each layer do not overlap in the circumferential direction between adjacent layers (i-th layer and (i + 1) -th layer, i is an integer from 1 to N-1). [Selection] Figure 3

Description

本開示は、例えばイメージスキャナ又はファックス等の給紙装置に関する。 The present disclosure relates to a paper feeding device such as an image scanner or a fax machine.

近年、自動原稿搬送装置（ＡＤＦ）等の給紙装置を搭載した画像読取装置が普及している。給紙装置の原稿搬送経路の途中には、原稿の重送を防ぐために、分離ローラと、分離ローラの反対側にリタードローラとが配置される。   In recent years, an image reading apparatus equipped with a paper feeding device such as an automatic document feeder (ADF) has become widespread. A separation roller and a retard roller on the opposite side of the separation roller are disposed in the middle of the document conveyance path of the sheet feeding device in order to prevent document double feeding.

分離ローラへ搬送されてきた原稿は、当該分離ローラとリタードローラによって挟み込まれる。このとき、２枚の原稿が一緒に分離ローラとリタードローラとの間に進入すると、逆回転もしくは停止したリタードローラに接する原稿の搬送が阻止され、最上位の１枚の原稿のみが他の原稿と分離されて送り出される。   The document conveyed to the separation roller is sandwiched between the separation roller and the retard roller. At this time, if the two originals enter between the separation roller and the retard roller together, the conveyance of the original contacting the reversely rotated or stopped retard roller is blocked, and only the topmost original is the other original. It is separated and sent out.

原稿を確実に分離するためには、分離ローラとリタードローラとが当接する面積（ニップ量）を十分に大きくして、リタードローラが十分な摩擦力を得る必要がある。このため、リタードローラには、分離ローラとの接触部分が容易にたわむ柔軟性が求められる。また、リタードローラには、ランニングコストを抑えるために耐摩耗性も求められる。   In order to reliably separate the original, it is necessary to sufficiently increase the area (nip amount) where the separation roller and the retard roller abut so that the retard roller can obtain a sufficient frictional force. For this reason, the retard roller is required to have flexibility to easily bend the contact portion with the separation roller. The retard roller is also required to have wear resistance in order to reduce running costs.

リタードローラの材質を低硬度ゴム材料等の弾性率の高いものにすれば、十分なニップ量を得ることができるものの、耐摩耗性が不十分となる。   If the retard roller is made of a material having a high elastic modulus such as a low-hardness rubber material, a sufficient nip amount can be obtained, but the wear resistance is insufficient.

特許文献１には、柔軟性と耐摩耗性の両立を図るために、ローラ基材を軟質ウレタンで形成して柔軟性を確保し、ローラ基材の外周面をＥＰＤＭ（エチレンプロピレンジエンゴム）で被覆して耐摩耗性を確保したリタードローラが開示されている。   In Patent Document 1, in order to achieve both flexibility and wear resistance, the roller base material is made of soft urethane to ensure flexibility, and the outer peripheral surface of the roller base material is made of EPDM (ethylene propylene diene rubber). A retard roller that is coated to ensure wear resistance is disclosed.

特開２００５−８２３７６号公報JP 2005-82376 A

しかしながら、リタードローラを２種類の材料により構成すると、製造工数が多くかかり、製造コストが高くなる。   However, if the retard roller is made of two kinds of materials, the number of manufacturing steps is increased and the manufacturing cost is increased.

本開示の目的は、かかる点に鑑みてなされたものであり、十分な耐摩耗性を有する単一の材料でリタードローラを構成しても、十分なニップ量を得ることができる給紙装置を提供することである。 The purpose of the present disclosure has been made in view of the above, it is configured retard roller in a single material having sufficient abrasion resistance, the sheet feeding device that can be obtained a sufficient nip amount Is to provide.

本開示の給紙装置は、モータにより回転駆動される分離ローラと、前記分離ローラと当接するように配置されるリタードローラと、を具備する給紙装置であって、前記リタードローラは、円筒形状のローラ基材からなり、前記ローラ基材の材料は合成ゴムであり、前記ローラ基材には、前記ローラ基材の中心軸線に対して同心円状の第１層（最外層）から第Ｎ層（最内層）までのＮ個（Ｎは２以上の整数）の各層に、Ｍ個（Ｍは４以上の整数）の円弧状の長孔が、各層における長孔の間のスポーク部が隣接層において周方向に重ならず、第ｉ層（ｉは１からＮ−１までの整数）の長孔の径方向の長さが第ｉ＋１層の長孔のものより長くなるように形成され、前記長孔が凹むように変形することにより、前記リタードローラの外周面の一部が前記分離ローラの外形形状に倣うようにたわんで前記分離ローラと接触する。 A sheet feeding device according to an embodiment of the present disclosure is a sheet feeding device including a separation roller that is rotationally driven by a motor, and a retard roller that is disposed so as to contact the separation roller, and the retard roller has a cylindrical shape. The roller base material is made of synthetic rubber, and the roller base material includes a first layer (outermost layer) to an Nth layer concentric with the central axis of the roller base material. Each of N layers (N is an integer of 2 or more) up to (innermost layer) has M (M is an integer of 4 or more) arc-shaped long holes, and the spoke portions between the long holes in each layer are adjacent layers. In which the radial length of the long hole of the i-th layer (i is an integer from 1 to N-1) is longer than that of the long hole of the i + 1-th layer. By deforming so that the long hole is recessed, a part of the outer peripheral surface of the retard roller is moved forward. It bends to follow the outer shape of the separation roller in contact with the separation roller.

本開示によれば、十分な耐摩耗性を有する単一の材料でリタードローラを構成しても、十分なニップ量を得ることができる。 According to the present disclosure, a sufficient nip amount can be obtained even if the retard roller is formed of a single material having sufficient wear resistance.

本開示の一実施の形態に係るローラを具備する給紙装置が搭載された画像読取装置の概略図Schematic diagram of an image reading apparatus equipped with a sheet feeding device including a roller according to an embodiment of the present disclosure 本開示の一実施の形態に係るローラの斜視図The perspective view of the roller concerning one embodiment of this indication 本開示の一実施の形態に係るローラの正面断面図Front sectional view of a roller according to an embodiment of the present disclosure 本開示の一実施の形態に係るローラのたわみの状態を説明する図The figure explaining the state of deflection of a roller concerning one embodiment of this indication 本開示の一実施の形態に係るローラの斜視図The perspective view of the roller concerning one embodiment of this indication 本開示の一実施の形態に係るローラの正面断面図Front sectional view of a roller according to an embodiment of the present disclosure 本開示の一実施の形態に係るローラのたわみの状態を説明する図The figure explaining the state of deflection of a roller concerning one embodiment of this indication

以下、本開示の実施の形態について、図面を参照して詳細に説明する。   Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

図１は、本実施の形態に係るローラ（リタードローラ５）を具備する給紙装置が搭載された画像読取装置の概略図である。なお、図１の画像読取装置１０において、給紙ローラ３、分離ローラ４およびリタードローラ５を含む部分が給紙装置を構成する。   FIG. 1 is a schematic view of an image reading apparatus on which a paper feeding device including a roller (retard roller 5) according to the present embodiment is mounted. In the image reading apparatus 10 of FIG. 1, the part including the paper feed roller 3, the separation roller 4, and the retard roller 5 constitutes a paper feed device.

図１の画像読取装置１０が読取動作を開始すると、原稿載置台１は、図示しないリフト機構によって、搭載された原稿２を給紙ローラ３に当接する位置まで上昇させる。このとき、原稿２は、所定の圧力で給紙ローラ３に付勢される。   When the image reading apparatus 10 in FIG. 1 starts a reading operation, the document placing table 1 raises the loaded document 2 to a position where it abuts against the paper feed roller 3 by a lift mechanism (not shown). At this time, the document 2 is urged by the paper feed roller 3 with a predetermined pressure.

給紙ローラ３と分離ローラ４は、図示しないモータにより回転駆動され、原稿給紙方向（矢印Ａ方向）へ回転する。原稿２は、給紙ローラ３の回転とともに装置内部へ引き込まれ、分離ローラ４とリタードローラ５の圧接部Ｘへ進入する。   The paper feed roller 3 and the separation roller 4 are driven to rotate by a motor (not shown) and rotate in the document feed direction (arrow A direction). The document 2 is drawn into the apparatus along with the rotation of the paper feed roller 3 and enters the pressure contact portion X between the separation roller 4 and the retard roller 5.

分離ローラ４に直接当接している場合、リタードローラ５は、分離ローラ４に連れ回りして給送方向に回転する。また、圧接部Ｘに原稿２が１枚だけ進入した場合も、リタードローラ５は、原稿２に連れ回りして給送方向に回転し、原稿２は前進する。一方、圧接部Ｘに２枚以上の原稿が進入した場合、原稿２の紙葉間の摩擦が分離ローラ４と１枚目の原稿２、リタードローラと２枚目の原稿２との摩擦より小さいため、分離ローラ４に当接した１枚目の原稿２のみが２枚目以降の原稿と分離されて前進する。   When directly in contact with the separation roller 4, the retard roller 5 rotates with the separation roller 4 in the feeding direction. Also, when only one document 2 enters the pressure contact portion X, the retard roller 5 rotates along with the document 2 and rotates in the feeding direction, and the document 2 advances. On the other hand, when two or more originals enter the pressure contact portion X, the friction between the sheets of the original 2 is smaller than the friction between the separation roller 4 and the first original 2 and between the retard roller and the second original 2. Therefore, only the first document 2 in contact with the separation roller 4 is separated from the second and subsequent documents and moves forward.

画像読取装置１０は、撮像装置６ａ、６ｂで、圧接部Ｘを通過した原稿２の画像を読取り、その後原稿２を排紙部７へ排出する。   The image reading device 10 reads the image of the document 2 that has passed through the press contact portion X by the imaging devices 6 a and 6 b, and then discharges the document 2 to the paper discharge unit 7.

次に、本実施の形態に係るローラ（リタードローラ５）について、図２（斜視図）、図３（正面断面図）を用いて説明する。   Next, the roller (retard roller 5) according to the present embodiment will be described with reference to FIG. 2 (perspective view) and FIG. 3 (front sectional view).

リタードローラ５（ローラ基材）は、ＥＰＤＭ（エチレンプロピレンジエンゴム）やポリウレタン等の合成ゴム（工業用ゴム材料）からなる。合成ゴムは、十分な耐摩耗性を有し、比較的小さな外力によって変形し、外力が開放されると直ちに元の形状に戻る弾性を有する。   The retard roller 5 (roller base material) is made of synthetic rubber (industrial rubber material) such as EPDM (ethylene propylene diene rubber) or polyurethane. Synthetic rubber has sufficient abrasion resistance, is deformed by a relatively small external force, and has elasticity that returns to its original shape as soon as the external force is released.

リタードローラ５（ローラ基材）は、円筒形状を為す。円筒の内径は１０〜３６ｍｍ、外径は２４〜５６ｍｍであり、外径は内径よりも１４ｍｍ以上大きい。リタードローラ５が給紙装置に組み付けられる際、中央の貫通孔（内周面）１１には、回転軸が挿入される。   The retard roller 5 (roller base material) has a cylindrical shape. The inner diameter of the cylinder is 10 to 36 mm, the outer diameter is 24 to 56 mm, and the outer diameter is 14 mm or more larger than the inner diameter. When the retard roller 5 is assembled to the sheet feeding device, a rotation shaft is inserted into the central through hole (inner peripheral surface) 11.

リタードローラ５には、中心軸線Ｃに対して同心円状の第１層（最外層）から第Ｎ層（最内層）までのＮ個（Ｎは２以上の整数、図２、図３ではＮ＝２）の各層に、Ｍ個（Ｍは４以上の整数、図２、図３ではＭ＝８）の円弧状の長孔１２が形成される。各層における長孔１２の間のスポーク部１３の周方向の長さは１ｍｍ以上である。   The retard roller 5 has N pieces (N is an integer of 2 or more, N = N in FIGS. 2 and 3) from the first layer (outermost layer) to the Nth layer (innermost layer) concentric with respect to the central axis C. 2) M (M is an integer of 4 or more, M = 8 in FIGS. 2 and 3) arc-shaped long holes 12 are formed in each layer. The circumferential length of the spokes 13 between the long holes 12 in each layer is 1 mm or more.

各層において、長孔１２は、等間隔に形成されることが好ましく、同一形状に形成されることが好ましい。第ｉ層（ｉは１からＮ−１までの整数）の長孔１２の周方向の長さは、第ｉ＋１層の長孔１２のものより長いことが好ましい。第ｉ層の長孔１２の径方向の長さ（幅）は、第ｉ＋１層の長孔１２のものより長いことが好ましい。   In each layer, the long holes 12 are preferably formed at equal intervals, and are preferably formed in the same shape. The length in the circumferential direction of the long hole 12 of the i-th layer (i is an integer from 1 to N-1) is preferably longer than that of the long hole 12 of the i + 1-th layer. The length (width) in the radial direction of the long hole 12 of the i-th layer is preferably longer than that of the long hole 12 of the i + 1-th layer.

また、隣接層（第ｉ層と第ｉ＋１層）におけるスポーク部１３が、周方向に重ならないように、長孔１２が形成される。特に、第ｉ層の各長孔１２の周方向の中央と中心軸線Ｃとを通る平面上に、第ｉ＋１層のスポーク部１３があるように、換言すれば、第ｉ層の隣接する２つのスポーク部１３のそれぞれから、周方向において該２つのスポーク部１３の間に位置する第ｉ＋１層のスポーク部１３までの距離が等しくなるように、長孔１２が形成されるのが好ましい。   Further, the long holes 12 are formed so that the spoke portions 13 in the adjacent layers (i-th layer and (i + 1) -th layer) do not overlap in the circumferential direction. In particular, there is an i + 1-th layer spoke portion 13 on a plane passing through the center in the circumferential direction of each slot 12 in the i-th layer and the central axis C, in other words, two adjacent i-th layer layers. It is preferable that the long hole 12 is formed so that the distance from each of the spoke portions 13 to the spoke portion 13 of the (i + 1) -th layer located between the two spoke portions 13 in the circumferential direction is equal.

次に、リタードローラ５のたわみの状態について図４を用いて説明する。図４（Ａ）は、分離ローラ４の中心軸線Ｃとリタードローラ５の中心軸線Ｃとを通る平面上に、第１層（最外層）のスポーク部１３がある状態で、リタードローラ５が分離ローラ４に直接当接している場合を示す。図４（Ｂ）は、分離ローラ４の中心軸線Ｃとリタードローラ５の中心軸線Ｃとを通る平面上に、第１層（最外層）の長孔１２の中央部がある状態で、リタードローラ５が分離ローラ４に直接当接している場合を示す。   Next, the state of deflection of the retard roller 5 will be described with reference to FIG. FIG. 4A shows that the retard roller 5 is separated in a state where the spoke portion 13 of the first layer (outermost layer) is on a plane passing through the central axis C of the separation roller 4 and the central axis C of the retard roller 5. A case where the roller 4 is in direct contact with the roller 4 is shown. FIG. 4B shows the retard roller in a state where the central portion of the long hole 12 of the first layer (outermost layer) is on a plane passing through the central axis C of the separation roller 4 and the central axis C of the retard roller 5. A case where 5 is in direct contact with the separation roller 4 is shown.

図４（Ａ）の場合、第２ｉ層の長孔１２が凹むように変形することにより、リタードローラ５の外周面１４の当接部分が分離ローラ４の外形形状に倣うようにたわみ、分離ローラ４と接触する面積（ニップ量）が大きくなる。   In the case of FIG. 4A, by deforming so that the long hole 12 of the 2i layer is recessed, the contact portion of the outer peripheral surface 14 of the retard roller 5 bends so as to follow the outer shape of the separation roller 4, and the separation roller The area (nip amount) in contact with 4 increases.

図４（Ｂ）の場合、第２ｉ−１層の長孔１２が凹むように変形することにより、リタードローラ５の外周面１４の当接部分が分離ローラ４の外形形状に倣うようにたわみ、分離ローラ４と接触する面積（ニップ量）が大きくなる。   In the case of FIG. 4B, by deforming so that the long hole 12 of the second i-1 layer is recessed, the contact portion of the outer peripheral surface 14 of the retard roller 5 bends so as to follow the outer shape of the separation roller 4, The area (nip amount) in contact with the separation roller 4 is increased.

このように、本実施の形態によれば、ローラ基材の中心軸線に対して同心円状のＮ個の各層に、Ｍ個の円弧状の長孔が、各層における長孔の間のスポーク部が隣接層間において周方向に重ならないように形成される。これにより、十分な耐摩耗性を有する単一の材料で構成しても、分離ローラ４との接触部分が容易にたわむので、搬送される原稿と接触する面積（ニップ量）を大きくすることができ、十分な摩擦力を得ることができる。   As described above, according to the present embodiment, M arc-shaped long holes are formed in each of N layers concentric with the central axis of the roller base material, and the spoke portions between the long holes in each layer are provided. It is formed so as not to overlap in the circumferential direction between adjacent layers. As a result, even if it is made of a single material having sufficient wear resistance, the contact portion with the separation roller 4 is easily bent, so that the area (nip amount) in contact with the conveyed document can be increased. And sufficient frictional force can be obtained.

なお、リタードローラに形成する長孔を１層のみとすると、リタードローラの当たる位置によって原稿にかかる圧力が不均一となる。本実施の形態のように、リタードローラ５に２層以上の長孔１２を形成することにより、原稿２にかかる圧力を均一にすることができる。   If the oblong hole formed in the retard roller is only one layer, the pressure applied to the document becomes non-uniform depending on the position where the retard roller hits. As in the present embodiment, the pressure applied to the document 2 can be made uniform by forming the two or more long holes 12 in the retard roller 5.

なお、上記実施の形態の説明に用いた図２から図４では、層の数Ｎが２、各層の長孔１２の数Ｍが８のリタードローラ５を示しているが、本発明はこれに限られず、Ｎが２以上の整数、Ｍが４以上の整数であれば良い。図５から図７では、層の数Ｎが２、各層の長孔１２の数Ｍが１２のリタードローラ５を示す。   2 to 4 used in the description of the above embodiment, the retard roller 5 is shown in which the number N of layers is 2 and the number M of the long holes 12 in each layer is 8. It is not limited, and N may be an integer of 2 or more and M may be an integer of 4 or more. 5 to 7 show the retard roller 5 in which the number N of layers is 2 and the number M of the long holes 12 in each layer is 12. FIG.

本開示は、リタードローラを具備する給紙装置に用いるに好適である。
The present disclosure is suitable to a sheet feeding apparatus having a Ritadoro la.

３ 給紙ローラ
４ 分離ローラ
５ リタードローラ
１０ 画像読取装置
１２ 長孔
１３ スポーク部 DESCRIPTION OF SYMBOLS 3 Paper feed roller 4 Separation roller 5 Retard roller 10 Image reading device 12 Long hole 13 Spoke part

Claims (3)

モータにより回転駆動される分離ローラと、前記分離ローラと当接するように配置されるリタードローラと、を具備する給紙装置であって、
前記リタードローラは、
円筒形状のローラ基材からなり、
前記ローラ基材の材料は合成ゴムであり、
前記ローラ基材には、前記ローラ基材の中心軸線に対して同心円状の第１層（最外層）から第Ｎ層（最内層）までのＮ個（Ｎは２以上の整数）の各層に、Ｍ個（Ｍは４以上の整数）の円弧状の長孔が、各層における長孔の間のスポーク部が隣接層において周方向に重ならず、第ｉ層（ｉは１からＮ−１までの整数）の長孔の径方向の長さが第ｉ＋１層の長孔のものより長くなるように形成され、
前記長孔が凹むように変形することにより、前記リタードローラの外周面の一部が前記分離ローラの外形形状に倣うようにたわんで前記分離ローラと接触する、
給紙装置。 A sheet feeding device comprising: a separation roller that is rotationally driven by a motor; and a retard roller disposed so as to contact the separation roller,
The retard roller is
It consists of a cylindrical roller base material,
The material of the roller base material is synthetic rubber,
The roller base material includes N layers (N is an integer of 2 or more) from the first layer (outermost layer) to the Nth layer (innermost layer) concentric with the central axis of the roller base material. , M (M is an integer of 4 or more) arc-shaped long holes, the spoke portion between the long holes in each layer does not overlap in the circumferential direction in the adjacent layer, i-th layer (i is 1 to N-1 Is formed such that the radial length of the long hole is longer than that of the long hole of the (i + 1) th layer ,
By deforming so that the long hole is recessed, a part of the outer peripheral surface of the retard roller bends so as to follow the outer shape of the separation roller and comes into contact with the separation roller.
Paper feeder. 前記リタードローラの長孔は、前記各層において等間隔に形成される、
請求項１に記載の給紙装置。 The long holes of the retard roller are formed at equal intervals in each layer.
The paper feeding device according to claim 1 . 前記リタードローラの長孔は、前記各層において同一形状に形成される、
請求項１または２に記載の給紙装置。 The long hole of the retard roller is formed in the same shape in each layer,
The sheet feeding device according to claim 1 or 2 .
JP2016022742A 2016-02-09 2016-02-09 Paper feeder Expired - Fee Related JP6094913B1 (en)

Priority Applications (3)

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JP2016022742A JP6094913B1 (en) 2016-02-09 2016-02-09 Paper feeder
CN201710060695.6A CN107043029A (en) 2016-02-09 2017-01-25 Roller, roller unit, paper feed and the reading device with paper feed
US15/416,381 US10179714B2 (en) 2016-02-09 2017-01-26 Roller, roller unit, paper feeder provided with roller or roller unit, and image reader

Applications Claiming Priority (1)

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