JP4150235B2 - Development device - Google Patents

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Publication number
JP4150235B2
JP4150235B2 JP2002266018A JP2002266018A JP4150235B2 JP 4150235 B2 JP4150235 B2 JP 4150235B2 JP 2002266018 A JP2002266018 A JP 2002266018A JP 2002266018 A JP2002266018 A JP 2002266018A JP 4150235 B2 JP4150235 B2 JP 4150235B2
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Japan
Prior art keywords
developing device
developing
sheet material
developing roller
attached
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Expired - Fee Related
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JP2002266018A
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Japanese (ja)
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JP2004102082A (en
Inventor
哲夫 丹田
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Kyocera Corp
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Kyocera Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、プリンタ、FAX、あるいは複写機等の画像形成装置から着脱可能な現像装置に関するものであり、特に、装着前の輸送時に現像装置内に充填されている現像剤のもれを防止するために現像ローラの露出部分にシート材を貼り付けた現像装置に関するものである。
【0002】
【従来の技術】
従来の画像形成装置から着脱可能な2成分の現像装置は、図5に示すように、トナーを収容して適宜供給可能なトナーコンテナ21、現像フレーム22内に現像剤を撹拌する撹拌ミギサ23,24、トナー濃度を検知するトナーセンサ25、感光体ドラム上の静電潜像を現像する現像ローラ26、現像ローラ26表面上の現像剤層を規制する層厚規制ギャップローラ27を備えている。層厚規制ギャップローラ27による現像剤のシャットダウン方法は、特許文献1に開示された通りである。また、従来の現像装置としては特許文献2等に開示されている。
【0003】
【特許文献1】
特開平11−249424号公報
【0004】
【特許文献2】
特開平10−333406号公報
【0005】
【発明が解決しようとする課題】
ところが、従来の図5に示すような現像装置では、予め現像剤を充填しておくケースがあるが、振動等により現像ローラ26と現像フレームの22との隙間から現像剤が押し出されて飛び出してくるという問題があった。
【0006】
そこで、図6に示すように、現像ローラ26と現像フレーム22との隙間をウレタンフォーム28と厚紙29で被覆し、それらを梱包用テープ30,31,32で固定する方法があるが、部材が多く、作業時間を要するという問題があった。
【0007】
また、図7(a)に示すように、シール材33を現像ローラ26と現像フレーム22との隙間に挿入させた状態で梱包用テープ34,35で固定する方法があるが、シール材33は一般的に腰が無いために、シール材33のみで隙間に挿入させるには作業時間を要するという問題があった。また、シール材33の挿入状態が不完全であると、図7(b)に示すように、使用前にシール材33が隙間から抜けてしまい、現像装置内の現像剤が漏れてしまうという問題があった。
【0008】
【課題を解決するための手段】
本発明は、上記問題点に鑑みてなされたものであり、画像形成装置から着脱可能で、筐体内に静電潜像担持体上の静電潜像を現像する現像ローラと、該現像ローラ表面上の現像剤層を規制する層厚規制手段と、装着前に少なくとも前記現像ローラの露出部分を被覆するシートと、を備えてなる現像装置において、前記シート材の一方端に折曲部を形成し、折曲部の前記筐体と接触する部分に第1の接着部材を形成し、かつ前記一方端の折曲部近傍位置からシール材を形成した現像装置としたものである。
【0009】
【発明の実施の形態】
以下、本発明の実施例について図面を用いて説明する。なお、本実施例では、2成分現像装置でトナーを収容し適宜補給可能なトナーコンテナを配設した現像装置を用いた場合について説明するが、現像ローラが収容される筐体内に予め現像剤が充填されている現像装置であれば、どのような構成であってもよい。
【0010】
図1は、本発明の現像装置を示す図であり、トナーを収容して適宜供給可能なトナーコンテナ1、現像フレーム2内に現像剤を撹拌する撹拌ミギサ3,4、トナー濃度を検知するトナーセンサ5、感光体ドラム上(不図示)の静電潜像を現像する現像ローラ6、現像ローラ6表面上の現像剤層を規制する層厚規制ギャップローラ7、装着前に現像ローラ6の露出部分を被覆しておくシート材8、シート材の他端に貼付されて現像装置の前方上部壁面に止められる梱包用テープ10を形成している。層厚規制ギャップローラ7は従来の技術と同様の構成であるが、層形成用の隙間で現像剤の穂の形成を制御するマグネットのS極と現像ローラ6のN極が引き合う状態となるために現像剤の漏れを防止しており、現像時は、S極が現像ローラ6から離れた位置まで回動することにより、現像剤の通過が可能となる。
【0011】
本発明は、シート材8の梱包用テープ10が貼付されるのと反対端に折曲部8aを形成し、折曲部8aの現像フレーム2との接触部分に両面テープ8bを貼付し、折曲部8aの手前位置からシール材9を貼付し、輸送時(装着前)のシート材8は現像ローラ6に対して層厚規制ギャップローラ7の反対側となる現像ローラ6と現像フレーム2内面との隙間11にシール材9を差し込み、かつ両面テープ8bを現像フレーム2の側壁(前方下部壁面)2aに貼付した状態とすることを特徴とする。シール材9は、隙間11に差し込むことにより、密封するようになるようにしている。
【0012】
なお、本実施例では、両面テープ8bを用いたが他の接着部材を用いてもよく、シート材8の除去容易性を考えて、シート材8側の接着強度を強くしておくことが好ましい。また、本実施例では、シート材8に両面テープ8bの片方を貼付した場合について説明したが、貼付以外の方法で形成してもよい。
【0013】
また、シール材9は、隙間11に差し込むことにより、隙間11が密封され、隙間11から現像剤が噴出しなくなるような材料であればよいが、適度な弾性を持たせるために発砲材料としたり、密封しやすくするために両面にスキン層を有した発砲材料とすればよく、例えば、ゴム、ウレタンフォーム、フェルト、人工皮革であればよい。また、シート材8の厚みは、0.02〜0.2mm程度とし、シール材9の厚みは、隙間11の厚さより厚く、例えば隙間11の厚さに1mm以内の厚さを加えたものとすればよい。また、本実施例では、シール材9を折曲部8aの手前位置から貼付した場合について説明するが、折曲部8a近傍であればよく、また貼付でなくても貼付以外の方法で形成してもよい。
【0014】
図2は、本発明のシート材8を示す図であり、図2(a)に示すように、シート材8の端部にプレスで折り目8dを入れた状態で、折り目8dよりも端部側の側壁2と接触する面(図面上では上面)に両面テープ8bを貼り付けている。この際、両面テープ8bの側壁2と接触する面側の剥離紙12は貼り付けたままとする。そして、折り目8d手前位置となる上面に両面テープ8cによりシール材9を折り目8dより突出する状態で貼り付けている。ここで、両面テープ8bは剥離紙12が貼り付いている面よりもシート材8に貼り付ける面側の接着強度を強くしておくことが好ましい。そして、シート材8を現像装置に形成する時は、図2(b)に示すように、折り目8dでシート材8を折り曲げ、図2(c)に示すように、剥離紙12を剥がす。ここで、シート材8を折り目8dにより折り曲げることにより、シート材8に腰を付けることができ、シール材9を隙間11に押入しやすくなる。折曲部8aは、現像フレーム2の側壁2aの厚みと略同じであればよいが、4〜7mm程度が貼り付けやすい。
【0015】
図3(a)は、図2のシート材8を現像装置に被覆する直前の状態を示す図であり、図3(b)は、シール材9を隙間11に差し込み、両面テープ8bで折曲部8aを側壁2aに貼り付けた状態を示す図である。図3(b)に示すように、折曲部8aと側壁2aを両面テープ8bで貼り付けることにより、内部の現像剤によってシート材8が圧力を受けても簡単に抜け落ちることが無い状態となる。図3(c)は、シール材9の両サイドのシール状態を示す図であり、現像装置のサイドシール13の側端面とシール材9の側端面を接触させた状態でシールするようにすればよい。
【0016】
図4(a)は、現像装置を画像形成装置に装着する直前に梱包用シール10を剥がしてシート材8を取り去る時の状態を示す図であり、シール材9が形成されていない端を引っ張っている状態を示す図である。図4(b)は、シート材8が現像フレーム2から外れた状態を示す図であり、両面テープ8bはシート材8側の粘着強度の方が側壁2a側よりも強いため、両面テープ8bが側壁2aに残ることなくシート材8を取り去ることができる。なお、本実施例では、梱包用シール10をシート材8に貼り付けたまま梱包用シール10を引っ張る場合について示しているが、梱包用シール10を現像装置の前方上部壁面およびシール材9から剥がし、シート材8の端を引っ張るようにしてもよい。
【0017】
【発明の効果】
以上説明したように本発明の現像装置によれば、現像ローラと筐体内面との間にシール材を押入して密封し、かつ接着部材を筐体側壁に貼付することにより、シート材で被覆するための作業時間が短くなり、かつ確実に現像剤の漏れを防止する現像装置を提供することができる。
【図面の簡単な説明】
【図1】本発明の現像装置を示す図である。
【図2】本発明の現像装置に貼り付けられるシート材を示す図である。
【図3】本発明の現像装置にシート材を貼り付けた状態を示す図である。
【図4】本発明の現像装置からシート材を取り外した状態を示す図である。
【図5】従来の現像装置を示す図である。
【図6】従来の現像装置を示す図である。
【図7】従来の現像装置を示す図である。
【符号の説明】
1,21:トナーコンテナ
2,22:現像フレーム
2a:側壁
3,4,23,24:撹拌ミギサ
5,25:トナーセンサ
6,26:現像ローラ
7,27:層厚規制ギャップローラ
8:シート材
8a:折曲部
8b,8c:両面テープ
8d:折り目
9,33:シール材
10,30,31,32,34,35:梱包用テープ
11:隙間
12:剥離紙
13:サイドシール
28:ウレタンフォーム
29:厚紙
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a developing device that is detachable from an image forming apparatus such as a printer, a FAX, or a copying machine, and in particular, prevents leakage of developer filled in the developing device during transportation before mounting. Therefore, the present invention relates to a developing device in which a sheet material is attached to an exposed portion of the developing roller.
[0002]
[Prior art]
As shown in FIG. 5, the conventional two-component developing device detachable from the image forming apparatus includes a toner container 21 that can accommodate and appropriately supply toner, an agitation mixer 23 that agitates the developer in the developing frame 22, 24, a toner sensor 25 for detecting the toner density, a developing roller 26 for developing the electrostatic latent image on the photosensitive drum, and a layer thickness regulating gap roller 27 for regulating the developer layer on the surface of the developing roller 26. The method of shutting down the developer by the layer thickness regulating gap roller 27 is as disclosed in Patent Document 1. A conventional developing device is disclosed in Patent Document 2 and the like.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-249424
[Patent Document 2]
Japanese Patent Laid-Open No. 10-333406
[Problems to be solved by the invention]
However, in the conventional developing apparatus as shown in FIG. 5, there is a case in which the developer is filled in advance. However, the developer is pushed out from the gap between the developing roller 26 and the developing frame 22 due to vibration or the like and pops out. There was a problem of coming.
[0006]
Therefore, as shown in FIG. 6, there is a method of covering the gap between the developing roller 26 and the developing frame 22 with urethane foam 28 and cardboard 29 and fixing them with packing tapes 30, 31, 32. There was a problem that much work time was required.
[0007]
In addition, as shown in FIG. 7A, there is a method of fixing the sealing material 33 with packing tapes 34 and 35 in a state where the sealing material 33 is inserted into the gap between the developing roller 26 and the developing frame 22. In general, since there is no waist, there is a problem that it takes work time to insert the seal material 33 into the gap only. Further, when the sealing material 33 is incompletely inserted, as shown in FIG. 7B, the sealing material 33 comes out of the gap before use, and the developer in the developing device leaks. was there.
[0008]
[Means for Solving the Problems]
The present invention has been made in view of the above problems, and is a detachable image forming apparatus, and a developing roller for developing an electrostatic latent image on an electrostatic latent image carrier in a housing, and the surface of the developing roller In a developing device comprising a layer thickness regulating means for regulating an upper developer layer and a sheet covering at least an exposed portion of the developing roller before mounting, a bent portion is formed at one end of the sheet material In the developing device, the first adhesive member is formed in a portion of the bent portion that comes into contact with the casing, and the seal material is formed from the vicinity of the bent portion of the one end.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, a case where a developing device in which toner is stored in a two-component developing device and a toner container that can be appropriately replenished is used will be described. Any configuration may be used as long as the developing device is filled.
[0010]
FIG. 1 is a diagram illustrating a developing device according to the present invention, which includes a toner container 1 that can accommodate and appropriately supply toner, an agitator 3 and 4 that stirs developer in a developing frame 2, and a toner that detects toner concentration. Sensor 5, developing roller 6 that develops an electrostatic latent image on a photosensitive drum (not shown), layer thickness regulating gap roller 7 that regulates the developer layer on the surface of developing roller 6, and exposure of developing roller 6 before mounting A sheet material 8 that covers the portion, and a packaging tape 10 that is affixed to the other end of the sheet material and is fixed to the front upper wall surface of the developing device are formed. The layer thickness regulating gap roller 7 has the same configuration as that of the prior art, but the S pole of the magnet that controls the formation of the developer spikes and the N pole of the developing roller 6 are attracted by the gap for forming the layer. In the development, the south pole is rotated to a position away from the developing roller 6 so that the developer can pass therethrough.
[0011]
In the present invention, a bent portion 8a is formed at the opposite end of the sheet material 8 to which the packaging tape 10 is applied, and a double-sided tape 8b is applied to the contact portion of the bent portion 8a with the developing frame 2, The seal material 9 is pasted from the position in front of the curved portion 8a, and the sheet material 8 during transport (before mounting) is the inner surface of the developing roller 6 and the developing frame 2 on the opposite side of the layer thickness regulating gap roller 7 with respect to the developing roller 6. The sealing material 9 is inserted into the gap 11 and the double-sided tape 8b is stuck to the side wall (front lower wall surface) 2a of the developing frame 2. The sealing material 9 is sealed by being inserted into the gap 11.
[0012]
In this embodiment, the double-sided tape 8b is used, but another adhesive member may be used, and it is preferable to increase the adhesive strength on the sheet material 8 side in consideration of ease of removal of the sheet material 8. . Moreover, although the present Example demonstrated the case where one side of the double-sided tape 8b was stuck to the sheet material 8, you may form by methods other than sticking.
[0013]
The sealing material 9 may be a material that can be inserted into the gap 11 so that the gap 11 is sealed and the developer is not ejected from the gap 11. In order to facilitate sealing, a foam material having a skin layer on both sides may be used. For example, rubber, urethane foam, felt, or artificial leather may be used. Further, the thickness of the sheet material 8 is about 0.02 to 0.2 mm, and the thickness of the sealing material 9 is thicker than the thickness of the gap 11, for example, the thickness of the gap 11 plus 1 mm or less. do it. In the present embodiment, the case where the sealing material 9 is pasted from the front side of the bent portion 8a will be described. However, the seal material 9 may be in the vicinity of the bent portion 8a, and may be formed by a method other than pasting even if it is not pasted. May be.
[0014]
FIG. 2 is a view showing the sheet material 8 of the present invention. As shown in FIG. 2 (a), the end of the sheet material 8 is placed on the end side with respect to the fold line 8d in a state where the fold line 8d is put by a press. A double-sided tape 8b is affixed to the surface (upper surface in the drawing) in contact with the side wall 2 of the tape. At this time, the release paper 12 on the surface side in contact with the side wall 2 of the double-sided tape 8b is left attached. And the sealing material 9 is affixed on the upper surface which becomes a crease | fold 8d near position in the state which protrudes from the crease | fold 8d with the double-sided tape 8c. Here, it is preferable that the double-sided tape 8b has a stronger adhesive strength on the side to be attached to the sheet material 8 than the surface to which the release paper 12 is attached. When forming the sheet material 8 in the developing device, as shown in FIG. 2B, the sheet material 8 is folded at a fold 8d, and the release paper 12 is peeled off as shown in FIG. 2C. Here, by bending the sheet material 8 with the fold line 8d, the sheet material 8 can be seated and the seal material 9 can be easily pushed into the gap 11. The bent portion 8a may be approximately the same as the thickness of the side wall 2a of the developing frame 2, but about 4 to 7 mm is easily attached.
[0015]
3A is a diagram showing a state immediately before the sheet material 8 of FIG. 2 is coated on the developing device, and FIG. 3B is a diagram illustrating a state in which the sealing material 9 is inserted into the gap 11 and bent by the double-sided tape 8b. It is a figure which shows the state which affixed the part 8a on the side wall 2a. As shown in FIG. 3 (b), the bent portion 8a and the side wall 2a are attached with the double-sided tape 8b, so that the sheet material 8 does not easily fall off even when the sheet material 8 is subjected to pressure by the internal developer. . FIG. 3C is a diagram showing a sealing state on both sides of the sealing material 9. If the side end surface of the side seal 13 of the developing device and the side end surface of the sealing material 9 are in contact with each other, the sealing is performed. Good.
[0016]
FIG. 4A is a diagram illustrating a state when the packing seal 10 is peeled off and the sheet material 8 is removed immediately before the developing device is mounted on the image forming apparatus, and the end where the seal material 9 is not formed is pulled. FIG. FIG. 4B is a diagram showing a state in which the sheet material 8 is detached from the developing frame 2. The double-sided tape 8b has a stronger adhesive strength on the side of the sheet material 8 than on the side wall 2a side. The sheet material 8 can be removed without remaining on the side wall 2a. In this embodiment, the case where the packing seal 10 is pulled while the packing seal 10 is attached to the sheet material 8 is shown. However, the packing seal 10 is peeled off from the front upper wall surface of the developing device and the seal material 9. The end of the sheet material 8 may be pulled.
[0017]
【The invention's effect】
As described above, according to the developing device of the present invention, the sealing material is pressed between the developing roller and the inner surface of the casing to seal it, and the adhesive member is attached to the side wall of the casing, thereby covering with the sheet material. Therefore, it is possible to provide a developing device that shortens the working time for preventing the leakage and reliably prevents the leakage of the developer.
[Brief description of the drawings]
FIG. 1 is a diagram showing a developing device of the present invention.
FIG. 2 is a view showing a sheet material to be attached to the developing device of the present invention.
FIG. 3 is a diagram illustrating a state where a sheet material is attached to the developing device of the present invention.
FIG. 4 is a diagram illustrating a state where a sheet material is removed from the developing device of the present invention.
FIG. 5 is a diagram illustrating a conventional developing device.
FIG. 6 is a diagram illustrating a conventional developing device.
FIG. 7 is a diagram illustrating a conventional developing device.
[Explanation of symbols]
1, 2: Toner container 2, 22: Developing frame 2a: Side walls 3, 4, 23, 24: Stirring mixer 5, 25: Toner sensor 6, 26: Developing roller 7, 27: Layer thickness regulating gap roller 8: Sheet material 8a: bent portions 8b, 8c: double-sided tape 8d: creases 9, 33: sealant 10, 30, 31, 32, 34, 35: packing tape 11: gap 12: release paper 13: side seal 28: urethane foam 29: Cardboard

Claims (4)

画像形成装置から着脱可能で、筐体内に静電潜像担持体上の静電潜像を現像する現像ローラと、該現像ローラ表面上の現像剤層を規制する層厚規制手段と、前記画像形成装置への装着前に少なくとも前記現像ローラの露出部分を被覆するシートと、を備えてなる現像装置において、
前記シート材の一方端に折曲部を形成し、折曲部の前記筐体と接触する部分に第1の接着部材を形成し、かつ前記一方端の折曲部近傍位置からシール材をシート材の折り目より折曲部側に突出する状態で形成したことを特徴とする現像装置。
A developing roller that is detachable from the image forming apparatus and that develops the electrostatic latent image on the electrostatic latent image carrier in the housing; a layer thickness regulating means that regulates the developer layer on the surface of the developing roller; A developing device comprising: a sheet that covers at least an exposed portion of the developing roller before being attached to the forming device;
A bent portion is formed at one end of the sheet material, a first adhesive member is formed at a portion of the bent portion that comes into contact with the housing, and the sealing material is seated from a position near the bent portion at the one end. A developing device, characterized in that the developing device is formed so as to protrude from the crease of the material toward the bent portion .
前記シール材を前記現像ローラに対して前記層厚規制手段の反対側となる前記現像ローラと筐体の内面との間に差し込み、かつ前記第1の接着部材を前記筐体の前方下部壁面に貼付したことを特徴とする請求項1記載の現像装置。  The sealing material is inserted between the developing roller on the opposite side of the layer thickness regulating means with respect to the developing roller and the inner surface of the housing, and the first adhesive member is attached to the front lower wall surface of the housing. The developing device according to claim 1, wherein the developing device is attached. 前記シート材の他端を第2の接着部材で前記前方上部壁面に貼付したことを特徴とする請求項1記載の現像装置。  The developing device according to claim 1, wherein the other end of the sheet material is attached to the front upper wall surface with a second adhesive member. 前記第1の接着部材を両面テープとし、シート材側の接着強度を前記筐体側より強くすることを特徴とする請求項1記載の現像装置。  2. The developing device according to claim 1, wherein the first adhesive member is a double-sided tape, and the adhesive strength on the sheet material side is stronger than that on the housing side.
JP2002266018A 2002-09-11 2002-09-11 Development device Expired - Fee Related JP4150235B2 (en)

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JP4150235B2 true JP4150235B2 (en) 2008-09-17

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