JP4916129B2 - Foam punching method and foam roller manufacturing method - Google Patents

Foam punching method and foam roller manufacturing method Download PDF

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JP4916129B2
JP4916129B2 JP2005148867A JP2005148867A JP4916129B2 JP 4916129 B2 JP4916129 B2 JP 4916129B2 JP 2005148867 A JP2005148867 A JP 2005148867A JP 2005148867 A JP2005148867 A JP 2005148867A JP 4916129 B2 JP4916129 B2 JP 4916129B2
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foam
longitudinal direction
cross
frame
roller
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JP2006326687A (en
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功二 阿知葉
繁 青木
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Bridgestone Corp
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Description

本発明は発泡体の穿孔方法および発泡体ローラの製造方法（以下、単に「穿孔方法」および「製造方法」とも称する）に関し、詳しくは、画像形成装置等におけるローラ部材用途に好適に用いられる発泡体の穿孔方法およびこれを用いた発泡体ローラの製造方法に関する。   The present invention relates to a foam punching method and a foam roller manufacturing method (hereinafter also simply referred to as “perforation method” and “manufacturing method”), and more specifically, foaming suitably used for roller member applications in image forming apparatuses and the like. The present invention relates to a body punching method and a foam roller manufacturing method using the same.

複写機やプリンタ、ファクシミリ等の電子写真方式の画像形成装置においては、電子写真プロセスにおける現像、トナー層形成、クリーニング、給紙、搬送等の各工程で、現像ローラ、トナー層形成ローラ、クリーニングローラ、給紙ローラ、搬送ローラ等の各種ローラ部材が使用されている。   In electrophotographic image forming apparatuses such as copiers, printers, and facsimiles, a developing roller, a toner layer forming roller, and a cleaning roller are used in each process of development, toner layer formation, cleaning, paper feeding, and conveyance in an electrophotographic process. Various roller members such as a paper feed roller and a transport roller are used.

これらローラ部材は、軸の周囲に弾性材料や樹脂材料からなる弾性体の層を担持させた構造を有しており、特にトナー供給ローラ等の均一な当接面を必要とする部材においては、一般に、ポリウレタンフォーム等の弾性発泡体を用いた弾性発泡体ローラが使用されている。   These roller members have a structure in which an elastic material layer made of an elastic material or a resin material is supported around the shaft, and particularly in a member that requires a uniform contact surface such as a toner supply roller, In general, an elastic foam roller using an elastic foam such as polyurethane foam is used.

このような弾性発泡体ローラの製造方法の一つとして、所定形状に成形した弾性発泡体に貫通する孔をあけ、この孔に軸を挿通させてローラ形状を得る方法がある。この場合、高品質のローラを得るためには、図２に示すように、弾性発泡体１０に対し、精度良く真っ直ぐな孔１１をあけることが重要となる。このような弾性発泡体に対する穿孔に係る技術としては、例えば、特許文献１に、圧縮した弾性発泡体に回転する円筒状刃物で穴を開けた後、圧縮を解除して弾性発泡体を復元させる弾性発泡体の穴開け方法が記載されている。
特開平８−１２６９９７号公報（特許請求の範囲等） As one method for producing such an elastic foam roller, there is a method of obtaining a roller shape by making a hole penetrating through an elastic foam molded into a predetermined shape and inserting a shaft through the hole. In this case, in order to obtain a high-quality roller, it is important to make a straight hole 11 with high accuracy in the elastic foam 10 as shown in FIG. As a technique related to perforation for such an elastic foam, for example, in Patent Document 1, after making a hole with a cylindrical blade rotating on a compressed elastic foam, the compression is released and the elastic foam is restored. A method for drilling elastic foam is described.
JP-A-8-126997 (Claims etc.)

しかしながら、一般に発泡体は柔軟であるため、孔あけ時には軸にぶれを生じやすく、特に、寸法精度の十分でない発泡体に対して狙った位置に真っ直ぐな孔を安定してあけることは困難であった。また、上記特許文献１に記載されているように、長手方向に圧縮して、発泡体の側面外周と略等しい大きさの枠体にて発泡体を支持した状態で穴を開ける方法では、通常、枠体の寸法を発泡体の外寸の平均寸法より若干大きめに設定することが必要となるが、この場合、少しでも狙った寸法から外れると真っ直ぐに穿孔することができなかった。すなわち、図３の断面図に示すように、ドリル３０等で穴をあけた後に発泡体２０の圧縮を解除すると（図中の（ａ））、結果として波打った状態で穴２１が形成されることになり（図中の（ｂ））、これに軸１を挿入すると、発泡体２０自体が波打つように歪んだ状態となってしまう（図中の（ｃ）、なお、図中の符号３１は発泡体を圧縮するための圧縮バーであり、２２は枠体である）。これは、枠体の大きさが発泡体の側面外周に対し隙間を有する場合も同様であった。従って、発泡体に対し真っ直ぐな穴を簡易にあけるための十分な技術は未だ確立されていなかった。   However, since foam is generally flexible, the shaft is likely to be shaken when drilling, and it is particularly difficult to stably open straight holes at the target position for foams with insufficient dimensional accuracy. It was. In addition, as described in Patent Document 1 above, in the method of compressing in the longitudinal direction and making a hole in a state in which the foam is supported by a frame having a size substantially equal to the outer periphery of the side surface of the foam, It is necessary to set the size of the frame to be slightly larger than the average size of the outer dimensions of the foam. In this case, however, it was not possible to perforate straightly if it deviated from the target dimension. That is, as shown in the cross-sectional view of FIG. 3, when the compression of the foam 20 is released after making a hole with a drill 30 or the like ((a) in the figure), a hole 21 is formed in a waved state as a result. When the shaft 1 is inserted into this, the foam 20 itself is distorted so as to be undulated ((c) in the figure, the reference numeral in the figure). 31 is a compression bar for compressing the foam, and 22 is a frame). This was the same when the size of the frame had a gap with respect to the outer periphery of the side surface of the foam. Therefore, a sufficient technique for easily making a straight hole in the foam has not been established yet.

そこで本発明の目的は、画像形成装置等におけるローラ部材用途に好適に用いられる発泡体に対し、所望の位置に真っ直ぐな孔を確実にかつ簡易にあけることができる発泡体の穿孔方法およびこれを用いた発泡体ローラの製造方法を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a foam perforation method capable of reliably and simply forming a straight hole at a desired position with respect to a foam suitably used for a roller member in an image forming apparatus or the like. An object of the present invention is to provide a method for producing the foam roller used.

本発明者らは鋭意検討した結果、発泡体の長手方向外周を枠体で挟持するにあたり、発泡体の断面よりも小さな挟持部断面積を有するものを用いることで、上記課題を解決できることを見出して、本発明を完成するに至った。   As a result of intensive studies, the present inventors have found that the above problem can be solved by using a material having a cross-sectional area smaller than the cross section of the foam when the outer periphery in the longitudinal direction of the foam is held by the frame. Thus, the present invention has been completed.

即ち、本発明の発泡体の穿孔方法は、柱状の発泡体の長手方向外周を枠体で挟持して、該発泡体に長手方向に連通する穴を穿孔する発泡体の穿孔方法であって、前記枠体として、前記発泡体の長手方向に直交する断面の断面積より２〜２０％小さい挟持部断面積を有し、分割部材により構成されたものを用い、該枠体で前記発泡体を挟持した後に、該発泡体を長手方向に圧縮して、この長手方向に圧縮した後に前記穿孔を行うことを特徴とするものである。 That is, the foam perforation method of the present invention is a foam perforation method in which the outer periphery in the longitudinal direction of a columnar foam is sandwiched between frames and a hole communicating with the foam in the longitudinal direction is formed. The frame body has a sandwiching section cross-sectional area that is 2 to 20% smaller than the cross-sectional area of the cross- section orthogonal to the longitudinal direction of the foam body, and is composed of divided members. After the sandwiching, the foam is compressed in the longitudinal direction, and the perforation is performed after the foam is compressed in the longitudinal direction.

本発明においては、前記発泡体の長手方向の圧縮後の密度は、０．２〜０．８ｇ／ｃｍ３とすることが好ましい。 In the present invention, the density after compression in the longitudinal direction of the foam is preferably 0.2 to 0.8 g / cm 3 .

また、本発明の発泡体ローラの製造方法は、柱状の発泡体の長手方向外周を枠体で挟持して、該発泡体に長手方向に連通する穴を穿孔する穿孔工程を含む発泡体ローラの製造方法であって、前記枠体として、前記発泡体の長手方向に直交する断面の断面積より２〜２０％小さい挟持部断面積を有し、分割部材により構成されたものを用い、該枠体で前記発泡体を挟持した後に、該発泡体を長手方向に圧縮して、この長手方向に圧縮した後に前記穿孔を行うことを特徴とするものである。 In addition, the foam roller manufacturing method of the present invention includes a perforating step in which a longitudinal outer periphery of a columnar foam is sandwiched between frames and a hole communicating with the foam in the longitudinal direction is formed. A manufacturing method, wherein the frame body has a sandwiching section cross-sectional area that is 2 to 20% smaller than the cross-sectional area of the cross- section perpendicular to the longitudinal direction of the foam, and is constituted by divided members. After sandwiching the foam with a body, the foam is compressed in the longitudinal direction, and the perforation is performed after the foam is compressed in the longitudinal direction.

本発明の発泡体の穿孔方法によれば、発泡体を挟持する枠体として、発泡体の断面よりも小さい断面積のものを用いたことで、発泡体に対し、所望の位置に真っ直ぐな孔を確実にあけることが可能となった。また、発泡体を長手方向に圧縮すれば、より精密な穿孔を行うことが可能である。従ってこの穿孔方法を用いた発泡体ローラの製造方法によれば、真直性に優れた軸穴と、良好な表面性を有する発泡体ローラを得ることができる。   According to the method for punching a foam of the present invention, a frame having a cross-sectional area smaller than the cross section of the foam is used as a frame for sandwiching the foam, so that a straight hole at a desired position with respect to the foam is obtained. It became possible to make sure. Further, if the foam is compressed in the longitudinal direction, more precise perforation can be performed. Therefore, according to the foam roller manufacturing method using this punching method, it is possible to obtain a shaft roller having excellent straightness and a foam roller having good surface properties.

以下、本発明の好適な実施の形態について詳細に説明する。
本発明は、柱状の発泡体１０の長手方向外周を枠体で挟持して、発泡体１０に長手方向に連通する穴１１を穿孔する発泡体の穿孔方法であり、枠体１２として、発泡体１０の長手方向に直交する断面よりも小さい挟持部断面積を有するものを用いる点に特徴を有する。 Hereinafter, preferred embodiments of the present invention will be described in detail.
The present invention is a method of perforating a foam in which the outer periphery in the longitudinal direction of a columnar foam 10 is sandwiched by a frame, and a hole 11 communicating with the foam 10 in the longitudinal direction is perforated. 10 is characterized in that a pin having a holding section cross-sectional area smaller than a cross section perpendicular to the longitudinal direction is used.

図１に、本発明の一実施の形態に係る発泡体の穿孔方法の説明図（断面図）を示す。本発明において枠体１２の挟持部断面積とは、発泡体１０の長手方向に直交する面内において枠体１２で囲まれた、図中のＳkで示す断面部の面積をいう。本発明においては、この挟持部断面積Ｓkが、発泡体１０の長手方向に直交する断面よりも小さい枠体１２を用いる。従って本発明において発泡体１０は、枠体１２に挟持されることにより、長手方向に直交する面内で圧縮されることになる。この状態で発泡体１０に対し長手方向に穴１１を穿孔することで、図３に示す場合のような軸孔のぶれを防止して、真っ直ぐな穴をあけることが可能となる。 FIG. 1 is an explanatory view (cross-sectional view) of a foam perforation method according to an embodiment of the present invention. In the present invention, the sandwiching section cross-sectional area of the frame body 12 refers to the area of the cross-section portion indicated by Sk in the drawing surrounded by the frame body 12 in a plane orthogonal to the longitudinal direction of the foam 10. In the present invention, the clamping portion sectional area S k is used a small frame 12 than the cross-section perpendicular to the longitudinal direction of the foam 10. Therefore, in the present invention, the foam 10 is compressed in a plane perpendicular to the longitudinal direction by being sandwiched by the frame 12. By perforating the hole 11 in the longitudinal direction in the foam 10 in this state, it is possible to prevent the shaft hole from shaking as shown in FIG. 3 and to make a straight hole.

この場合、枠体１２の挟持断面積Ｓkとしては、発泡体１０の長手方向に直交する断面の断面積より２〜２０％、特には６〜１２％小さくすることが好ましい。挟持断面積Ｓkが発泡体１０の断面よりも小さすぎ、即ち、圧縮率が高すぎる場合、発泡体１０自体に不可逆な変形を生ずる場合があり好ましくない。一方、挟持断面積Ｓkが発泡体１０の断面積とほとんど変わらず、即ち、圧縮率が低すぎる場合、本発明による効果が不十分となって、穴にぶれが生じてしまう場合がある。 In this case, the clamping Zidane area S k of the frame 12, 2-20% than the cross-sectional area of the cross section perpendicular to the longitudinal direction of the foam 10, in particular is preferably 6-12% smaller. Kyojidan area S k is too small than the cross section of the foam 10, i.e., when the compression ratio is too high, undesirable may result in irreversible modifications to the foam 10 itself. On the other hand, Kyojidan area S k is not substantially the same as the cross-sectional area of the foam 10, i.e., when the compression ratio is too low, so the effect of the present invention is insufficient, it may blur the holes occurs.

また、本発明においては、枠体１２で挟持した発泡体１０を、さらに、長手方向に圧縮した状態で穿孔を行うことも好ましい。この場合、発泡体１０を、長手方向に直交する面内と、長手方向との、２つの方向から圧縮することになり、穴のぶれをより確実に抑えて、真っ直ぐな穴をあけることが可能となる。この場合、発泡体１２の長手方向の圧縮後の密度を、好ましくは０．２〜０．５ｇ／ｃｍ３、より好ましくは０．２５〜０．４ｇ／ｃｍ３程度とする。この圧縮率があまり小さいと、所期の効果が得られず、一方、あまり大きいと、発泡体１０自体に不可逆な変形を生ずる場合がありいずれも好ましくない。 In the present invention, it is also preferable to perforate the foam 10 sandwiched between the frame bodies 12 in a state where the foam 10 is further compressed in the longitudinal direction. In this case, the foam 10 is compressed from two directions, that is, in a plane perpendicular to the longitudinal direction and in the longitudinal direction, and it is possible to more reliably suppress the blurring of the hole and make a straight hole. It becomes. In this case, the longitudinal density after compression of the foam 12, preferably 0.2-0.5 g / cm 3, more preferably from 0.25~0.4g / cm 3 order. If the compression ratio is too small, the desired effect cannot be obtained. On the other hand, if the compression ratio is too large, irreversible deformation may occur in the foam 10 itself.

本発明の穿孔方法においては、発泡体１０の長手方向に穴をあけるにあたり上記枠体１２を用いるものであればよく、それ以外の点については特に制限されず、常法に従い行うことができる。例えば、本発明において穿孔に用いる器具としては、特に制限されるものではなく、刃の構造は、ドリル、中空刃（円筒刃）、針など、従来この用途に用いられるものであればいかなるものであってもよい。本発明の適用できる発泡体としては、例えば、ポリウレタンフォーム等を好適に挙げることができる。   In the perforation method of the present invention, the frame body 12 may be used in making a hole in the longitudinal direction of the foam 10, and other points are not particularly limited and can be performed according to a conventional method. For example, the instrument used for drilling in the present invention is not particularly limited, and the structure of the blade is any one that has been conventionally used for this purpose, such as a drill, a hollow blade (cylindrical blade), or a needle. There may be. As a foam to which the present invention can be applied, for example, polyurethane foam and the like can be preferably exemplified.

また、本発明の発泡体ローラの製造方法は、上記穿孔方法により発泡体に穿孔する穿孔工程を含むものであり、これにより、軸穴の真直性に優れるとともに表面性の良好な発泡体ローラを得ることができる。本発明の発泡体ローラの製造方法においては、上記穿孔工程を含む以外の点については常法に従い行うことができ、特に制限されるものではない。かかる本発明の製造方法により得られる発泡体ローラは、画像形成装置等におけるローラ部材用途に好適に適用することが可能である。   In addition, the method for producing a foam roller of the present invention includes a perforating step of perforating the foam by the perforation method, whereby a foam roller having excellent shaft hole straightness and good surface properties can be obtained. Obtainable. In the manufacturing method of the foam roller of this invention, it can carry out in accordance with a conventional method except the said perforation process, and it does not restrict | limit in particular. The foam roller obtained by the production method of the present invention can be suitably applied to a roller member application in an image forming apparatus or the like.

以下、本発明を、実施例を用いてより具体的に説明する。
（実施例）
長手方向に直交する面が２０ｍｍ×２０ｍｍの狙い寸法断面を有する密度０．１ｇ／ｃｍ３の柱状の発泡体１０を、図１に示すような挟持部断面積Ｓkが１９．０ｍｍ×１９．０ｍｍである枠体１２で挟持して、さらに、長さ方向に７０％圧縮した状態で穿孔を行ったところ、真っ直ぐな穴が形成された。 Hereinafter, the present invention will be described more specifically with reference to examples.
(Example)
A columnar foam 10 of a density 0.1 g / cm 3 that a plane orthogonal to the longitudinal direction has a target dimension cross-section of 20 mm × 20 mm, clamping unit cross-sectional area as shown in FIG. 1 S k is 19.0 mm × 19. When punching was performed with the frame 12 being 0 mm and further compressed by 70% in the length direction, a straight hole was formed.

（従来例）
一方、長手方向に直交する面が２０ｍｍ×２０ｍｍの断面を有する柱状の発泡体１０を、図４に示すような挟持部断面積Ｓk’が２０ｍｍ×２０ｍｍである枠体２２で挟持して、長さ方向に７０％圧縮した状態で穿孔を行ったところ、図２（ｂ）に示すような波打つように歪んだ形状の穴が形成された。 (Conventional example)
On the other hand, a columnar foam 10 having a cross section of 20 mm × 20 mm in a plane orthogonal to the longitudinal direction is sandwiched by a frame body 22 having a sandwiching section sectional area S k ′ of 20 mm × 20 mm as shown in FIG. When perforation was performed in a state compressed 70% in the length direction, a hole having a distorted shape as shown in FIG. 2B was formed.

本発明の一実施の形態に係る発泡体の穿孔方法の説明図である。It is explanatory drawing of the punching method of the foam which concerns on one embodiment of this invention. 穴のあいた状態の発泡体を示す斜視図である。It is a perspective view which shows the foam of a state with a hole. （ａ）〜（ｃ）は、従来の穴開け方法に係る説明図である。(A)-(c) is explanatory drawing which concerns on the conventional drilling method. 従来例における穴開け方法に係る説明図である。It is explanatory drawing which concerns on the drilling method in a prior art example.

符号の説明Explanation of symbols

１ 軸
１０，２０ 発泡体
１１，２１ 穴
１２，２２ 枠体
３０ ドリル
３１ 圧縮バー 1 shaft 10, 20 foam 11, 21 hole 12, 22 frame 30 drill 31 compression bar

Claims (3)

柱状の発泡体の長手方向外周を枠体で挟持して、該発泡体に長手方向に連通する穴を穿孔する発泡体の穿孔方法であって、前記枠体として、前記発泡体の長手方向に直交する断面の断面積より２〜２０％小さい挟持部断面積を有し、分割部材により構成されたものを用い、該枠体で前記発泡体を挟持した後に、該発泡体を長手方向に圧縮して、この長手方向に圧縮した後に前記穿孔を行うことを特徴とする発泡体の穿孔方法。 A method of perforating a foam by sandwiching the outer periphery in the longitudinal direction of a columnar foam with a frame, and perforating a hole communicating with the foam in the longitudinal direction, the frame as the longitudinal direction of the foam Using a cross- sectional area that is 2 to 20% smaller than the cross-sectional area of the cross- section orthogonal to each other and composed of divided members, the foam is compressed in the longitudinal direction after the foam is clamped by the frame. Then, the method of perforating a foam is characterized in that the perforation is performed after compression in the longitudinal direction. 前記発泡体の長手方向の圧縮後の密度を０．２〜０．８ｇ／ｃｍ３とする請求項１記載の発泡体の穿孔方法。 Drilling method of claim 1 Symbol placement of the foam and 0.2 to 0.8 g / cm 3 the density after longitudinal compression of the foam. 柱状の発泡体の長手方向外周を枠体で挟持して、該発泡体に長手方向に連通する穴を穿孔する穿孔工程を含む発泡体ローラの製造方法であって、前記枠体として、前記発泡体の長手方向に直交する断面の断面積より２〜２０％小さい挟持部断面積を有し、分割部材により構成されたものを用い、該枠体で前記発泡体を挟持した後に、該発泡体を長手方向に圧縮して、この長手方向に圧縮した後に前記穿孔を行うことを特徴とする発泡体ローラの製造方法。 A foam roller manufacturing method including a perforating step of sandwiching a longitudinal outer periphery of a columnar foam with a frame and perforating a hole communicating with the foam in the longitudinal direction, the foam as the frame After the sandwiched body has a cross- sectional area that is 2 to 20% smaller than the cross-sectional area of the cross- section perpendicular to the longitudinal direction of the body and is composed of divided members, the foam is sandwiched by the frame body. A method of manufacturing a foam roller , wherein the perforation is performed after compressing in the longitudinal direction.
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CN104400827A (en) * 2014-11-29 2015-03-11 江西洪都航空工业集团有限责任公司 Point transfer device special for horizontal measuring point of aeronautical composite material wing-shaped molded part

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JP4948942B2 (en) * 2006-08-31 2012-06-06 株式会社イノアックコーポレーション Method and apparatus for perforating elastic foam
US11576837B2 (en) 2019-10-03 2023-02-14 Jfxd Trx Acq Llc Multi-zonal roller and method of use thereof

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CN104400827A (en) * 2014-11-29 2015-03-11 江西洪都航空工业集团有限责任公司 Point transfer device special for horizontal measuring point of aeronautical composite material wing-shaped molded part

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