JP3170992B2 - Cleaning blade and its manufacturing method - Google Patents
Cleaning blade and its manufacturing methodInfo
- Publication number
- JP3170992B2 JP3170992B2 JP04706594A JP4706594A JP3170992B2 JP 3170992 B2 JP3170992 B2 JP 3170992B2 JP 04706594 A JP04706594 A JP 04706594A JP 4706594 A JP4706594 A JP 4706594A JP 3170992 B2 JP3170992 B2 JP 3170992B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- support member
- blade member
- cleaning blade
- joined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004140 cleaning Methods 0.000 title claims description 35
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229920003023 plastic Polymers 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 16
- 239000012778 molding material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 13
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Landscapes
- Cleaning In Electrography (AREA)
- Cleaning In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真複写機等の感
光ドラムの外周面に残留するトナーを除去するクリーニ
ングブレードおよびその製法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning blade for removing toner remaining on the outer peripheral surface of a photosensitive drum of an electrophotographic copying machine and the like, and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】電子写真複写機としては、感光ドラム外
周面を一様に帯電させ、ついで被複写体の被複写像を介
してその外周面を露光することにより、上記外周面上に
静電潜像を形成し、この静電潜像にトナーを付着させて
トナー像を形成して複写紙等の転写することにより複写
を行う形式のものが一般的である。2. Description of the Related Art In an electrophotographic copying machine, an outer peripheral surface of a photosensitive drum is uniformly charged, and then the outer peripheral surface is exposed through an image to be copied of an object to be copied. Generally, a latent image is formed, toner is attached to the electrostatic latent image to form a toner image, and copying is performed by transferring the image onto copying paper or the like.
【０００３】このような電子写真複写機では、トナー像
を複写紙等に転写後に、図７に示すように、感光ドラム
１の外周面上にトナー２が残留するため、上記感光ドラ
ム１の外周面にクリーニングブレード３を摺接し、残留
トナー２をこれで掻き落として除去することが行われて
いる。In such an electrophotographic copying machine, the toner 2 remains on the outer peripheral surface of the photosensitive drum 1 as shown in FIG. A cleaning blade 3 is slid on the surface, and the remaining toner 2 is scraped off with this to remove it.
【０００４】上記クリーニングブレード３は、板金製の
支持部材４の長手方向に沿う片縁部に、ウレタン樹脂等
からなるブレード部材５を一体的に取り付けて構成され
ており、上記ブレード部材５の先端縁部Ｐを均一に感光
ドラム１の外周面に摺接させることが重要な課題とな
る。The cleaning blade 3 is constructed by integrally attaching a blade member 5 made of urethane resin or the like to one edge portion along a longitudinal direction of a support member 4 made of sheet metal. It is important to bring the edge P into uniform contact with the outer peripheral surface of the photosensitive drum 1.
【０００５】上記ブレード部材５としては、従来から、
図７に示すように、支持部材４を厚み方向に２等分する
中心線Ａをブレード部材５側に延長して二分割されるブ
レード部材５の厚みが互いに等しい、すなわち支持部材
４に対し厚み方向に対称となるブレード部材５が取り付
けられたものが用いられてきたが、最近、ブレード部材
５が、支持部材４に対し厚み方向において対称になって
いないものが賞用されている。これらの例を図８（ａ）
〜（ｄ）に示す。なお、各図において、Ｐが感光ドラム
１に対する摺接縁部となる。このような変形タイプのク
リーニングブレードは、曲げ応力の設計の自由度を大き
くすることができるという利点を有する。[0005] Conventionally, as the blade member 5,
As shown in FIG. 7, the center line A, which bisects the support member 4 in the thickness direction, is extended to the blade member 5 side, and the blade members 5 that are divided into two have the same thickness. Although a member having a blade member 5 that is symmetrical in the direction has been used, a blade member 5 that is not symmetrical in the thickness direction with respect to the support member 4 has recently been awarded. These examples are shown in FIG.
To (d). In addition, in each figure, P is a sliding contact edge portion with respect to the photosensitive drum 1. Such a deformation type cleaning blade has an advantage that the degree of freedom in designing bending stress can be increased.
【０００６】[0006]
【発明が解決しようとする課題】しかし、その反面、上
記変形タイプのクリーニングブレードを、支持部材４の
片縁部を内部空間に挟み込んだ型内に、加熱下で、キャ
スティングあるいはインジェクション注入により樹脂材
料を注型し、硬化させたのち脱型して切断する、という
型成形によって得る場合、ブレード部材５を構成する樹
脂部分に局部変形が生じて感光ドラム１（図７参照）に
対し均一に摺接させることが難しいという問題がある。
すなわち、上記型成形された樹脂部分では、脱型後の冷
却によって熱収縮の残留応力が解放されるが、上記熱収
縮が、厚み方向においては、支持部材４の中心線Ａを中
心として厚い方が薄い方よりも大きく生じるため、図９
（ａ）に示すように、樹脂部分の厚い方に向かってブレ
ード部材５が熱収縮変形する。ただし、図９（ｂ）に示
すように、長手方向両端部においては端面がフリーな状
態にあるため左右方向に引っ張られることがなく、先端
部が多少中心側に寄るのみで、樹脂部分の厚い方への熱
収縮変形は生じない。このため、得られたクリーニング
ブレードは、図９に示すように、ブレード部材５の中央
領域は厚みの厚い方に均一に熱収縮変形し、両端部は真
直度が良好に維持されて、全体としては歪んだ形状とな
り（ただし変形幅は、図面では実際より誇張して表示し
ている）、感光ドラム１の外周面に適正に摺接させるこ
とができない。すなわち、上記変形した中央領域を感光
ドラム１（図６参照）外周面に適正に摺接させると、両
端部が感光ドラム１の外周面に深く接しすぎて感光ドラ
ム１の回転に帯同してめくれ、順次中央に向かってめく
れて最終的には全体がめくれるという現象が生じ、ブレ
ード部材５の損傷や破損を招きやすい。また、変形のな
い両端部を感光ドラム１外周面に適正に摺接させると、
変形した中央領域の押付力が不充分となり、トナーヌケ
が生じる。On the other hand, on the other hand, the above-mentioned deformable cleaning blade is cast into a mold in which one edge of the supporting member 4 is sandwiched in an internal space by casting or injection molding under heating. Is cast, cured, and then removed from the mold, and then cut. In this case, local deformation occurs in the resin portion of the blade member 5 and the photosensitive drum 1 (see FIG. 7) is uniformly slid. There is a problem that it is difficult to contact.
That is, in the molded resin portion, the residual stress due to thermal shrinkage is released by cooling after demolding, but the thermal shrinkage is thicker around the center line A of the support member 4 in the thickness direction. 9 is larger than the thinner one.
As shown in (a), the blade member 5 undergoes heat shrinkage deformation toward the thicker portion of the resin portion. However, as shown in FIG. 9 (b), since the end faces are free at both ends in the longitudinal direction, the end faces are not pulled in the left-right direction, the tip is slightly shifted toward the center side, and the resin portion is thick. No heat shrinkage deformation occurs. For this reason, as shown in FIG. 9, the obtained cleaning blade uniformly heat shrinks and deforms the central region of the blade member 5 to a thicker side, and the both ends are maintained in a good straightness, and as a whole, Has a distorted shape (however, the deformation width is exaggeratedly shown in the drawing) and cannot be properly brought into sliding contact with the outer peripheral surface of the photosensitive drum 1. That is, when the deformed central region is appropriately slid on the outer peripheral surface of the photosensitive drum 1 (see FIG. 6), both end portions are too deeply in contact with the outer peripheral surface of the photosensitive drum 1 and are turned together with the rotation of the photosensitive drum 1. Then, a phenomenon occurs in which the blade member 5 is sequentially turned toward the center and finally the whole is turned, and the blade member 5 is likely to be damaged or broken. Further, when both ends without deformation are brought into sliding contact with the outer peripheral surface of the photosensitive drum 1 properly,
The pressing force in the deformed central region becomes insufficient, and toner leakage occurs.
【０００７】本発明は、このような事情に鑑みなされた
もので、型成形によって得られる上記変形タイプのクリ
ーニングブレードであっても、ほぼ均一に感光ドラム外
周面に摺接させることができ、ブレード部材のめくれや
トナーヌケを生じることのない優れたクリーニングブレ
ードおよびその製法の提供をその目的とする。The present invention has been made in view of such circumstances, and even a cleaning blade of the above-described deformable type obtained by molding can be brought into almost uniform sliding contact with the outer peripheral surface of the photosensitive drum. It is an object of the present invention to provide an excellent cleaning blade that does not cause the member to be turned up or the toner to be removed, and a method for manufacturing the same.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は、略板状支持部材の長手方向に沿う片縁部
に、型成形によってブレード部材が一体的に取り付けら
れ、かつ上記支持部材を厚み方向に二等分する中心線を
ブレード部材側に延長して二分割されるブレード部材の
厚みが互いに異なるよう上記ブレード部材が支持部材に
対し偏って取り付けられているクリーニングブレードで
あって、上記支持部材の長手方向両端部において、ブレ
ード部材と接合する部分と非接合部分にまたがる所定領
域が、上記中心線で二分割されるブレード部材の厚みの
厚い方に向かって突出するよう塑性変形されているクリ
ーニングブレードを第１の要旨とし、略板状支持部材の
長手方向に沿う片縁部に、型成形によりブレード部材を
一体的に取り付けるクリーニングブレードの製法であっ
て、上記支持部材として、その長手方向両端部であって
ブレード部材と接合させる部分と非接合部分にまたがる
所定領域に、厚み方向の一方側に突出するよう塑性変形
を与えたものを準備する工程と、上記塑性変形を与えた
支持部材を成形型に装着し、上記支持部材のブレード部
材非接合部を型根元部で挟持することにより上記塑性変
形領域をあたかも変形がなされてないように強制保持し
た状態で型内にブレード部材成形材料を充填し、上記支
持部材を厚み方向に二等分する中心線をブレード部材側
に延長して二分割されるブレード部材の厚みが、上記支
持部材の所定領域を塑性変形により突出させるようにし
た側の方が厚くなるようブレード部材を支持部材に対し
偏った配置で成形するようにしたクリーニングブレード
の製法を第２の要旨とする。In order to achieve the above-mentioned object, the present invention provides a method in which a blade member is integrally attached to one edge portion of a substantially plate-shaped support member along a longitudinal direction by molding. A cleaning blade in which a center line that bisects the support member in the thickness direction is extended toward the blade member and the blade member is biased with respect to the support member so that the thickness of the divided blade members differs from each other. At both longitudinal ends of the support member, a predetermined region extending between a portion to be joined to the blade member and a non-joined portion is formed so as to protrude toward the thicker one of the blade member divided into two by the center line. The deformed cleaning blade is the first gist, and the blade member is integrally attached to one edge along the longitudinal direction of the substantially plate-shaped support member by molding. A method of manufacturing a cleaning blade, wherein a plastic deformation is applied to a predetermined region between both ends in a longitudinal direction thereof and a portion to be joined to a blade member and a non-joined portion as the support member so as to protrude to one side in a thickness direction. A step of preparing the plastic deformation, mounting the plastically deformed support member on a molding die, and clamping the blade member non-joined portion of the support member at a mold root portion, as if deforming the plastic deformation region. Filling the mold with the blade member molding material in a state in which the blade member is forcibly held so as not to extend the center line bisecting the support member in the thickness direction toward the blade member side, and the thickness of the blade member divided into two is reduced. The blade member is formed so as to be biased with respect to the support member so that the side where the predetermined region of the support member protrudes by plastic deformation is thicker. The preparation of over training blade and the second aspect.
【０００９】[0009]
【作用】すなわち、本発明者らは、支持部材に対しブレ
ード部材が厚み方向に偏ったクリーニングブレードを型
成形で得る場合に生じるブレード部材縁部の局部変形を
解消する方法について一連の研究を行った。そして、そ
の過程で、ブレード部材長手方向の中央領域が熱収縮に
よって変形するのは避けられない現象であり、この熱収
縮変形に合わせて、長手方向両端部に対し意図的に同様
の変形を与えれば、ブレード部材が長手方向に均一に変
形することとなって、感光ドラムに対して均一に摺接さ
せることができるのではないかと想起し、さらに研究を
重ねた。その結果、ブレード部材を取り付ける支持部材
の長手方向両端部を、ブレード部材が型成形後に熱収縮
変形する方向に予め塑性変形させておき、その変形部分
を、ブレード部材成形用の型で挟持してあたかも変形し
ていないように強制保持し、その状態で型内に樹脂等の
成形材料を充填し、脱型するようにすると、脱型後に、
上記支持部材の両端部が元通り変形するため、この変形
によって、成形されたブレード部材両端部がある程度変
形した状態で支持される。また、上記両端部以外の中央
領域は、支持部材が真っ直ぐであるにもかかわらず、熱
収縮によって変形する。したがって、両端部においても
中央領域においても、その縁部は、極端に突出すること
なく近似した態様で変形しており、これを均一に感光ド
ラム外周面に摺接することができることを見いだし、本
発明に到達した。That is, the present inventors have conducted a series of studies on a method for eliminating local deformation of the blade member edge which occurs when a cleaning blade in which the blade member is biased in the thickness direction with respect to the support member is obtained by molding. Was. In the process, it is inevitable that the central region in the longitudinal direction of the blade member is deformed by heat shrinkage. In accordance with this heat shrinkage deformation, the same deformation is intentionally given to both ends in the longitudinal direction. If the blade member is deformed uniformly in the longitudinal direction, for example, the blade member can be slid uniformly on the photosensitive drum. As a result, both ends in the longitudinal direction of the support member to which the blade member is attached are plastically deformed in advance in a direction in which the blade member thermally deforms after the molding, and the deformed portion is sandwiched by the blade member molding die. If the mold is forcibly held as if it has not been deformed and the mold is filled with a molding material such as resin in that state and the mold is removed, after the mold is removed,
Since both ends of the support member are deformed as before, the deformed blade member is supported in a state where both ends are deformed to some extent. Further, the central region other than the both end portions is deformed by the heat shrinkage even though the support member is straight. Therefore, at both ends and in the central region, the edges are deformed in an approximate manner without protruding extremely, and it is found that the edges can be uniformly slid on the outer peripheral surface of the photosensitive drum. Reached.
【００１０】つぎに、本発明を実施例にもとづいて詳細
に説明する。Next, the present invention will be described in detail based on embodiments.
【００１１】[0011]
【実施例】まず、図１に示すように、従来のクリーニン
グブレードに用いられるものと同様の支持部材４を準備
した。すなわち、この支持部材４は、長方形状の板金材
を断面略Ｌ字状に折り曲げ形成したもので、その立ち上
がり面４ａの上縁部に、鎖線で示すようにブレード部材
５が取り付けられるようになっている。なお、上記立ち
上がり面４ａの左右には、鎖線で示される取付部材６に
支持部材４を取り付けるための穴７および長穴８が形成
されている。First, as shown in FIG. 1, a support member 4 similar to that used for a conventional cleaning blade was prepared. That is, the support member 4 is formed by bending a rectangular sheet metal material into a substantially L-shaped cross section, and the blade member 5 can be attached to the upper edge of the rising surface 4a as shown by a chain line. ing. A hole 7 and a long hole 8 for attaching the support member 4 to the attachment member 6 indicated by a chain line are formed on the left and right sides of the rising surface 4a.
【００１２】つぎに、上記支持部材４の上縁部のうち、
左右両端部の、図１において斜線で示す三角領域Ｓを、
プレス加工によって、ブレード部材５が厚肉で取り付け
られる側に向かって斜めに折り曲げた。したがって、上
記支持部材４の上縁部のうち、左右両端部のみ塑性変形
して、図２に示すように、一定の傾斜が与えられた。な
お、図において上記塑性変形が与えられた部分と未変形
部分の境界をＱで示す。Next, of the upper edge of the support member 4,
The triangular area S shown by oblique lines in FIG.
By pressing, the blade member 5 was bent diagonally toward the side where the blade member 5 was attached with a large thickness. Therefore, only the left and right ends of the upper edge of the support member 4 were plastically deformed, and a certain inclination was given as shown in FIG. In the drawing, Q indicates the boundary between the portion subjected to the plastic deformation and the undeformed portion.
【００１３】そして、この支持部材４を、図３に示すよ
うに、ブレード部材５成形用の型９の成形用空間１０内
に、その上端部を挿入した状態で装着した。このとき、
上記塑性変形された三角領域Ｓの一部を、型９根元部で
圧締して挟持することにより、上記三角領域Ｓがあたか
も変形されていないかのような真っ直ぐな姿勢に強制保
持した。この状態で、型９を加熱し、上記成形用空間１
０内に、ウレタン樹脂形成用の主剤（例えばポリイソシ
アネートと高分子量ポリオールとを部分的に重合させた
プレポリマー）と硬化剤（例えば低分子量ポリオールま
たは低分子量および高分子量ポリオールの混合物））と
の混合液を充填し熱硬化させた。Then, as shown in FIG. 3, the support member 4 was mounted in a molding space 10 of a mold 9 for molding the blade member 5 with its upper end inserted. At this time,
A part of the plastically deformed triangular region S was pressed and clamped at the base of the mold 9 to forcibly hold the triangular region S in a straight posture as if it was not deformed. In this state, the mold 9 is heated and the molding space 1 is heated.
Within 0, a mixture of a main agent for forming a urethane resin (for example, a prepolymer obtained by partially polymerizing a polyisocyanate and a high-molecular-weight polyol) and a curing agent (for example, a low-molecular-weight polyol or a mixture of low-molecular-weight and high-molecular-weight polyols) The mixture was filled and thermally cured.
【００１４】つぎに、上記硬化物を型９内から脱型し、
冷却後、図３において鎖線Ｂで示す部分を切断し、目的
とするクリーニングブレードを得た。このようにした得
られたクリーニングブレードは、型９内では真っ直ぐな
姿勢に強制保持されていた支持部材４の三角領域Ｓが元
に戻って塑性変形しているため、図４に示すように、長
手方向両端部では殆ど変形していないブレード部材５
が、変形した支持部材４によってブレード部材５の厚み
が厚い方に向かって斜めに傾斜した状態で支持されてい
る。また、何ら塑性変形が与えられていない長手方向中
央領域は、支持部材４は真っ直ぐであるが、ブレード部
材５自体が、従来と同様、熱収縮によって、ブレード部
材５の厚みが厚い方に向かって斜めに変形する（図１０
参照）ため、長手方向両端部と中央領域において、変形
に伴う偏りはごく小さいものとなる。Next, the cured product is released from the mold 9,
After cooling, a portion indicated by a chain line B in FIG. 3 was cut to obtain a desired cleaning blade. In the cleaning blade thus obtained, since the triangular area S of the support member 4 which has been forcibly held in the straight posture in the mold 9 returns to its original position and is plastically deformed, as shown in FIG. The blade member 5 which is hardly deformed at both ends in the longitudinal direction
However, the blade member 5 is supported by the deformed support member 4 in a state where the blade member 5 is inclined obliquely toward a thicker one. Further, in the central region in the longitudinal direction where no plastic deformation is given, the support member 4 is straight, but the blade member 5 itself is thermally shrunk toward a thicker blade member 5 due to heat shrinkage as in the related art. Deforms diagonally (Fig. 10
Therefore, the deviation due to the deformation is extremely small at both ends in the longitudinal direction and the central region.
【００１５】ちなみに、支持部材４に何ら塑性変形を与
えない従来の方法で得られたクリーニングブレードを５
個サンプリングし、感光ドラムに摺接させる縁部Ｐの偏
り具合を、支持部材４の端面Ｘ（図４参照）を基準とし
て長手方向の７個所で測定したところ、図５に示すよう
に、縁部Ｐの偏りは、０．１ｍｍ以上のばらつきをもっ
ており、縁部Ｐを感光ドラムに均一に摺接させることは
困難であることがわかる。このようなクリーニングブレ
ードは、実際に使用すると、両端側から順に感光ドラム
外周面につれ回りしてまくれ上がるという不良品になり
やすい。By the way, the cleaning blade obtained by the conventional method which does not give any plastic deformation to the supporting member 4 is used as a cleaning blade.
The sampled pieces were measured and the degree of deviation of the edge P to be brought into sliding contact with the photosensitive drum was measured at seven points in the longitudinal direction with reference to the end face X (see FIG. 4) of the support member 4. As shown in FIG. The deviation of the portion P has a variation of 0.1 mm or more, which indicates that it is difficult to bring the edge portion P into sliding contact with the photosensitive drum uniformly. When such a cleaning blade is actually used, it is likely to be a defective product in which the cleaning blade is rotated around the outer peripheral surface of the photosensitive drum in order from both ends.
【００１６】これに対し、上記実施例の製法で得られた
クリーニングブレードを５個サンプリングし、上記従来
品と同様にして縁部Ｐの偏り具合を測定したところ、図
６に示すように、長手方向両端部の縁部も塑性変形によ
ってある程度基準面Ｘ側に偏っている（図において偏り
幅をＷで示す）ため、縁部の偏りは、略０．０５ｍｍ以
内に収まっていることがわかる。したがって、このよう
なクリーニングブレードは、縁部を感光ドラムに略均一
に摺接させることができ、従来のような不良品となるこ
とがない。On the other hand, five cleaning blades obtained by the manufacturing method of the above embodiment were sampled, and the degree of deviation of the edge P was measured in the same manner as in the above-mentioned conventional product. As shown in FIG. Since the edges at both ends in the direction are also somewhat deviated to the reference plane X side due to plastic deformation (the deviation width is indicated by W in the figure), it can be seen that the deviation of the edges is within approximately 0.05 mm. Therefore, the edge of such a cleaning blade can be brought into substantially uniform sliding contact with the photosensitive drum, and the cleaning blade does not become defective as in the related art.
【００１７】なお、上記実施例では、支持部材４の上縁
部左右両端の三角領域Ｓを塑性変形しているが、塑性変
形させる位置およびその形状は特に限定されるものでは
ない。例えば、変形部を四角形や台形形状に設定し、非
変形部との境界部に段差をつけるようにしてもよい。In the above embodiment, the triangular regions S at the left and right ends of the upper edge of the support member 4 are plastically deformed. However, the position and the shape of the plastic deformation are not particularly limited. For example, the deformed portion may be set in a square or trapezoidal shape, and a step may be provided at the boundary with the non-deformed portion.
【００１８】ただし、上記塑性変形領域を形成する場
合、その領域が完全にブレード部材５との接合部に包含
される位置にあると、ブレード部材成形時に、成形型９
の根元部で、上記塑性変形を真っ直ぐに強制保持するこ
とができないので、その一部がブレード部材５と接合し
ない部分にはみ出るよう設定しなければならない。そし
て、上記塑性変形領域の面積は、効果の点から、２ｍｍ
2 以上に設定することが好適である。However, when the plastic deformation region is formed, if the region is located at a position completely included in the joint with the blade member 5, the forming die 9 is formed at the time of forming the blade member.
Since the plastic deformation cannot be forcibly held straight at the root of the blade member 5, it must be set so that a part thereof protrudes into a portion not joined to the blade member 5. The area of the plastic deformation region is 2 mm from the viewpoint of the effect.
It is preferable to set it to two or more.
【００１９】また、上記塑性変形領域を形成する場合、
その変形の程度は、理論的には、熱収縮によってブレー
ド部材５の長手方向中心領域に生じる変形に伴う縁部Ｐ
の偏り幅を算出し、上記塑性変形によって生じるブレー
ド部材５の両端部の傾斜に伴う縁部Ｐの偏り幅が上記算
出された偏り幅に近似するよう、その変形量を決定する
ことが好ましいが、便宜的には、その変形量の最大値が
０．０５ｍｍ以上になることが目安とされる。Further, when forming the plastic deformation region,
The degree of the deformation is, theoretically, the edge P due to the deformation generated in the central region in the longitudinal direction of the blade member 5 due to the heat shrinkage.
It is preferable to calculate the deviation width of the blade member 5 and determine the amount of the deformation so that the deviation width of the edge P due to the inclination of the both ends of the blade member 5 caused by the plastic deformation approximates the calculated deviation width. For convenience, it is assumed that the maximum value of the deformation amount is 0.05 mm or more.
【００２０】さらに、上記実施例では、ブレード部材５
の成形材料として、ウレタン樹脂形成用の主剤と硬化剤
混合液を用いたが、成形材料としては、これに限らず、
従来からブレード部材５の成形材料として用いられてい
るものであれば、どのようなものを用いても差し支えは
ない。Further, in the above embodiment, the blade member 5
As a molding material, a mixture of a main agent for forming a urethane resin and a curing agent was used, but the molding material is not limited to this.
Any material that has conventionally been used as a molding material for the blade member 5 may be used.
【００２１】[0021]
【発明の効果】以上のように、本発明は、ブレード部材
を取り付ける支持部材の長手方向両端部を、ブレード部
材が型成形後に熱収縮変形する方向に予め塑性変形させ
ておき、その変形部分を、ブレード部材成形用の型で挟
持してあたかも変形していないように強制保持し、その
状態で型内に樹脂等の成形材料を充填し、脱型後に、上
記支持部材の両端部を元通りに変形させて、成形された
ブレード部材両端部を、ある程度変形した状態で支持す
るようにしたものである。これにより、ブレード部材両
端部が、熱収縮によって変形した中央領域と同様、片側
に傾斜した状態になるため、中央領域，両端部ともに同
じ程度に偏りを生じ、均一に感光ドラム外周面に摺接さ
せることができる。したがって、従来品のように、ブレ
ード部材のめくれやトナーヌケを生じることがない、と
いう優れた効果を奏する。As described above, according to the present invention, the longitudinal end portions of the support member to which the blade member is attached are plastically deformed in advance in the direction in which the blade member undergoes heat shrinkage deformation after the molding, and the deformed portion is formed. , Forcibly holding it as if it was not deformed by sandwiching it with a blade member molding die, filling the mold with a molding material such as resin in that state, removing the mold, and returning both ends of the support member to the original state Thus, both ends of the formed blade member are supported in a deformed state to some extent. As a result, both ends of the blade member are inclined to one side in the same manner as the central region deformed by heat shrinkage, so that both the central region and both ends are biased to the same extent and uniformly contact the outer peripheral surface of the photosensitive drum. Can be done. Therefore, there is an excellent effect that the blade member is not turned up or the toner is not removed unlike the conventional product.
【図１】（ａ）は本発明の一実施例に用いる支持部材の
左側面図、（ｂ）はその正面図である。FIG. 1A is a left side view of a support member used in an embodiment of the present invention, and FIG. 1B is a front view thereof.
【図２】上記支持部材に塑性変形を与えた状態の説明図
である。FIG. 2 is an explanatory view showing a state where plastic deformation is given to the support member.
【図３】上記支持部材を成形型に装着した状態の説明図
である。FIG. 3 is an explanatory view showing a state where the support member is mounted on a molding die.
【図４】上記支持部材にブレード部材を一体成形した状
態の説明図である。FIG. 4 is an explanatory view of a state where a blade member is integrally formed with the support member.
【図５】従来法によって得られたクリーニングブレード
のブレード部材縁部が、長手方向において基準点からど
の程度偏っているかを示す線図である。FIG. 5 is a diagram showing how the edge of a blade member of a cleaning blade obtained by a conventional method is deviated from a reference point in a longitudinal direction.
【図６】上記実施例の製法によって得られたクリーニン
グブレードのブレード部材縁部が、長手方向において基
準点からどの程度偏っているかを示す線図である。FIG. 6 is a diagram showing how much the edge of the blade member of the cleaning blade obtained by the manufacturing method of the above embodiment is deviated from the reference point in the longitudinal direction.
【図７】クリーニングブレードの使用態様の説明図であ
る。FIG. 7 is an explanatory diagram of a usage mode of a cleaning blade.
【図８】（ａ），（ｂ），（ｃ）および（ｄ）はいずれ
も変形タイプのクリーニングブレードの説明図である。8 (a), (b), (c) and (d) are explanatory views of a deformable cleaning blade.
【図９】（ａ）は変形タイプのクリーニングブレードに
生じる局部変形を示す側面図、（ｂ）はその正面図であ
る。9A is a side view showing a local deformation occurring in a deformation type cleaning blade, and FIG. 9B is a front view thereof.
【図１０】上記図９（ｂ）のＹ−Ｙ′断面図である。FIG. 10 is a sectional view taken along the line YY ′ of FIG. 9 (b).
４ 支持部材 ５ ブレード部材 Ｓ 三角領域 4 Support member 5 Blade member S Triangular area
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−235987（ＪＰ，Ａ) 特開 平４−212190（ＪＰ，Ａ) 特開 平６−67582（ＪＰ，Ａ) 特開 平６−230708（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 21/10 - 21/12 B08B 1/00 - 1/04 B08B 5/00 - 13/00 B60S 1/00 - 1/68 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 1-235987 (JP, A) JP-A 4-212190 (JP, A) JP-A 6-67582 (JP, A) JP-A 6-67582 230708 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) G03G 21/10-21/12 B08B 1/00-1/04 B08B 5/00-13/00 B60S 1/00 -1/68
Claims (4)
に、型成形によってブレード部材が一体的に取り付けら
れ、かつ上記支持部材を厚み方向に二等分する中心線を
ブレード部材側に延長して二分割されるブレード部材の
厚みが互いに異なるよう上記ブレード部材が支持部材に
対し偏って取り付けられているクリーニングブレードで
あって、上記支持部材の長手方向両端部において、ブレ
ード部材と接合する部分と非接合部分にまたがる所定領
域が、上記中心線で二分割されるブレード部材の厚みの
厚い方に向かって突出するよう塑性変形されていること
を特徴とするクリーニングブレード。1. A blade member is integrally attached to one edge portion of a substantially plate-shaped support member along a longitudinal direction by molding, and a center line that bisects the support member in a thickness direction is set on the blade member side. A cleaning blade in which the blade member is biased with respect to the support member such that the thickness of the blade member that is extended into two is different from each other, and the blade member is joined to the blade member at both longitudinal ends of the support member. A cleaning blade, wherein a predetermined region extending between a portion to be joined and a non-joined portion is plastically deformed so as to protrude toward a thicker blade member divided by the center line.
定領域が、連続的に傾斜する変形になっており、その変
形量の最大値が０．０５ｍｍ以上に設定されている請求
項１記載のクリーニングブレード。2. The plastically deformed predetermined region at both ends of the support member is a continuously inclined deformation, and the maximum value of the deformation is set to 0.05 mm or more. Cleaning blade.
定領域の面積が２ｍｍ2 以上に設定されている請求項１
または２記載のクリーニングブレード。3. The plastically deformed predetermined area at both ends of the support member has an area of 2 mm 2 or more.
Or the cleaning blade according to 2.
に、型成形によりブレード部材を一体的に取り付けるク
リーニングブレードの製法であって、上記支持部材とし
て、その長手方向両端部であってブレード部材と接合さ
せる部分と非接合部分にまたがる所定領域に、厚み方向
の一方側に突出するよう塑性変形を与えたものを準備す
る工程と、上記塑性変形を与えた支持部材を成形型に装
着し、上記支持部材のブレード部材非接合部を型根元部
で挟持することにより上記塑性変形領域をあたかも変形
がなされてないように強制保持した状態で型内にブレー
ド部材成形材料を充填し、上記支持部材を厚み方向に二
等分する中心線をブレード部材側に延長して二分割され
るブレード部材の厚みが、上記支持部材の所定領域を塑
性変形により突出させるようにした側の方が厚くなるよ
うブレード部材を支持部材に対し偏った配置で成形する
ようにしたことを特徴とするクリーニングブレードの製
法。4. A method of manufacturing a cleaning blade in which a blade member is integrally attached to one edge portion of a substantially plate-shaped support member along a longitudinal direction by molding, wherein both ends in the longitudinal direction are used as the support member. A step of preparing a plastically deformed part so as to protrude to one side in the thickness direction in a predetermined region spanning a part to be joined to the blade member and a non-joined part, and forming the plastically deformed support member into a molding die Attached, filling the blade member molding material in the mold in a state where the plastic deformation region is forcibly held as if no deformation has been made by sandwiching the blade member non-joined portion of the support member at the mold root portion, The thickness of the blade member that is bisected by extending the center line that bisects the support member in the thickness direction to the blade member side is such that a predetermined region of the support member protrudes by plastic deformation. A method of manufacturing a cleaning blade, characterized in that a blade member is formed so as to be biased with respect to a supporting member so that a side of the cleaning blade becomes thicker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04706594A JP3170992B2 (en) | 1994-03-17 | 1994-03-17 | Cleaning blade and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04706594A JP3170992B2 (en) | 1994-03-17 | 1994-03-17 | Cleaning blade and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07261615A JPH07261615A (en) | 1995-10-13 |
| JP3170992B2 true JP3170992B2 (en) | 2001-05-28 |
Family
ID=12764764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04706594A Expired - Lifetime JP3170992B2 (en) | 1994-03-17 | 1994-03-17 | Cleaning blade and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3170992B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4634205B2 (en) * | 2005-04-06 | 2011-02-16 | キヤノン化成株式会社 | Blade manufacturing method |
| CN105637427A (en) * | 2013-10-31 | 2016-06-01 | 阪东化学株式会社 | Blade support body for electronic photograph device |
-
1994
- 1994-03-17 JP JP04706594A patent/JP3170992B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07261615A (en) | 1995-10-13 |
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