JP3090256B2 - Ground structure for paper feed related members of printer - Google Patents
Ground structure for paper feed related members of printerInfo
- Publication number
- JP3090256B2 JP3090256B2 JP08298182A JP29818296A JP3090256B2 JP 3090256 B2 JP3090256 B2 JP 3090256B2 JP 08298182 A JP08298182 A JP 08298182A JP 29818296 A JP29818296 A JP 29818296A JP 3090256 B2 JP3090256 B2 JP 3090256B2
- Authority
- JP
- Japan
- Prior art keywords
- piece
- paper feed
- plate portion
- roller
- ground
- 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 - Fee Related
Links
Landscapes
- Handling Of Cut Paper (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、プリンタの紙送り
関連部材用アース構造に関し、特に、金属製のフレーム
部材に金属製の弾性を有するアース部材を組付け、アー
ス部材の摺接片に紙送り関連部材側の導電部材を接触さ
せて静電気を逃すように構成したものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding structure for a paper feed-related member of a printer, and more particularly, to a metal frame member having a metal elastic member mounted thereon, and a sliding member of the ground member having paper sliding members. The present invention relates to a configuration in which a conductive member on the side of a feed-related member is brought into contact to release static electricity.
【0002】[0002]
【従来の技術】従来、レーザープリンタ等種々のプリン
タにおいては、送りローラを、電動モータと複数のギヤ
等を有する駆動機構により回転駆動し、送りローラとの
摩擦力を介して用紙を送るように構成してある。前記送
りローラには用紙との摩擦接触により静電気が発生する
が、その静電気が送りローラからアースされないと、ノ
イズが発生したり、正常な印字作動が得られないことが
あるため、従来のプリンタには、送りローラに発生した
静電気を逃す為のアース構造が設けられている。2. Description of the Related Art Conventionally, in various printers such as a laser printer, a feed roller is driven to rotate by a driving mechanism having an electric motor and a plurality of gears so that paper is fed via frictional force with the feed roller. It is composed. Static electricity is generated in the feed roller due to frictional contact with paper.If the static electricity is not grounded from the feed roller, noise may occur or normal printing operation may not be obtained. Is provided with a ground structure for releasing static electricity generated in the feed roller.
【0003】一般的なアース構造は、弾性を有する金属
製のアース部材を、送りローラを回転支持する支持板や
駆動ユニットのフレーム板等のフレーム部材に、ボルト
やビス等で固定するか、或いはアース部材の端部をフレ
ーム部材の取付け穴に挿入しプレス等でかしめて組付
け、このアース部材を接地するとともに、アース部材の
摺接片に送りローラの金属製の回転軸(電導部材)に接
触させて、送りローラに発生した静電気を、回転軸から
アース部材を介してアースするように構成してある。A general grounding structure is to fix a metal grounding member having elasticity to a frame member such as a support plate for rotatably supporting a feed roller or a frame plate of a drive unit with bolts or screws, or Insert the end of the grounding member into the mounting hole of the frame member, crimp it with a press or the like, and assemble it. This grounding member is grounded, and the sliding contact piece of the grounding member is connected to the metal rotating shaft (conductive member) of the feed roller. The contact roller is configured to ground the static electricity generated on the feed roller from the rotating shaft via a ground member.
【0004】ここで、この種のアース構造において、前
記フレーム部材が金属製のものでは、そのフレーム部材
の基端部を接地された金属製基板等に連結し、送りロー
ラに発生した静電気を、回転軸からアース部材、フレー
ム部材、金属製基板へと逃してアースし、一方、フレー
ム部材が合成樹脂製のものでは、アース部材と前記金属
製基板をリード線等で接続して、送りローラに発生した
静電気を、回転軸からアース部材、リード線、金属製基
板へと逃がしてアースするのが一般的である。In this type of earth structure, if the frame member is made of metal, the base end of the frame member is connected to a grounded metal substrate or the like, and the static electricity generated on the feed roller is reduced. An earth member, a frame member, and a metal substrate are escaped from the rotating shaft to earth, while the frame member is made of a synthetic resin, and the earth member and the metal substrate are connected by a lead wire or the like, and the feed roller is connected to the feed roller. Generally, the generated static electricity is released from the rotating shaft to a ground member, a lead wire, and a metal substrate to be grounded.
【0005】[0005]
【発明が解決しようとする課題】しかし、従来のアース
構造において、アース部材をボルトやビス等でフレーム
部材に固定する場合、部品数が多くなり、アース部材の
組付けにも多大の労力がかかるため、アース構造のコス
トが非常に高価になる。アース部材の端部をかしめてフ
レーム部材に組付ける場合においても、カシメ用のプレ
スが必要であること、また、プレスでアース部材の端部
をかしめてフレーム部材に組付ける多大な労力がかかる
こと、等によりアース構造のコストが非常に高価にな
る。また、フレーム部材が合成樹脂製のものでは、アー
ス部材と金属製基板をリード線等で接続する必要があ
り、アース構造が複雑化するという問題もある。However, in the conventional earth structure, when the earth member is fixed to the frame member with bolts or screws, the number of parts increases, and much labor is required for assembling the earth member. Therefore, the cost of the ground structure becomes very expensive. When caulking the end of the grounding member and assembling it to the frame member, a crimping press is required, and a large amount of labor is required to caulk the end of the grounding member and assemble it to the frame member. , Etc., make the cost of the ground structure very expensive. Further, when the frame member is made of a synthetic resin, it is necessary to connect the ground member and the metal substrate with a lead wire or the like, and there is a problem that the ground structure is complicated.
【0006】本発明の目的は、紙送り関連部材用アース
構造を簡単化すること、アース部材のフレーム部材への
組付け作業を簡単化すること、紙送り関連部材用アース
構造のコストを低減すること、等である。SUMMARY OF THE INVENTION It is an object of the present invention to simplify a ground structure for a paper feed-related member, to simplify an assembling operation of a ground member to a frame member, and to reduce the cost of a ground structure for a paper feed-related member. And so on.
【0007】[0007]
【課題を解決するための手段】請求項1のプリンタの紙
送り関連部材用アース構造は、プリンタの紙送り関連部
材に発生した静電気を逃す為のアース構造において、紙
送り関連部材の一端側に位置する金属製のフレーム部材
に、縦板部と、この縦板部の上端から水平方向に屈曲形
成した水平板部と、この水平板部の自由端に水平に突設
された係合凸部と、縦板部に形成された係合穴とを設
け、水平板部に当接される水平片と、この水平片から縦
板部に当接して下方へ延び下端部に前記係合穴に係合す
る係合屈曲片を有する縦片と、水平板部の自由端付近で
水平片から立上がった摺接片と、この摺接片から一体的
に延び前記係合凸部が係合する係合穴を設けた係合片と
を有する金属製の弾性を有するアース部材を設け、アー
ス部材の摺接片に紙送り関連部材側の導電部材を接触さ
せてその導電部材からアース部材を介して金属製のフレ
ーム部材へ静電気を逃すように構成したものである。According to a first aspect of the present invention, there is provided a grounding structure for a paper feed related member of a printer, wherein the ground structure for discharging static electricity generated in the paper feed related member of the printer is provided at one end of the paper feed related member. A vertical plate portion, a horizontal plate portion formed by bending horizontally from the upper end of the vertical plate portion, and an engagement convex portion protruded horizontally at a free end of the horizontal plate portion on a metal frame member located thereon. And an engagement hole formed in the vertical plate portion, a horizontal piece abutting on the horizontal plate portion, and extending downward from the horizontal piece in contact with the vertical plate portion and extending into the engagement hole at the lower end portion. a longitudinal piece, the sliding piece rises from the horizontal plate in the vicinity of the free end of the horizontal plate portion, the engagement projection extending this sliding piece or al integrally engagement with an engagement bend piece to be engaged A metal elastic member having an engaging piece provided with an engaging hole to be provided, and a paper sliding contact piece of the earth member. Ri is obtained by contacting the relevant member side of the conductive member configured to escape static electricity from the conductive member to the metal frame member through the ground member.
【0008】アース部材は、その水平片,縦片を夫々フ
レーム部材の水平板部,縦板部に当接させ、アース部材
の係合穴に係合凸部を係合させるとともに、係合屈曲片
を縦板部の係合穴に係合させた状態で、フレーム部材に
組付けられる。導電部材と摺接片とを常時確実に接触さ
せておく為に、摺接片に導電部材を押し当て摺接片を弾
性変形させて接触させる。この状態で、係合凸部に係合
している係合穴を支点として、アース部材には回動力が
作用するが、係合屈曲片が縦板部の係合穴へ係合してい
るため、アース部材の回動が阻止されて、アース部材が
フレーム部材から外れることがない。The ground member has its horizontal and vertical pieces abutting against the horizontal and vertical plate portions of the frame member, respectively. The piece is assembled to the frame member while being engaged with the engagement hole of the vertical plate portion. In order to ensure that the conductive member and the sliding contact piece always contact each other, the conductive member is pressed against the sliding contact piece so that the sliding contact piece is elastically deformed and brought into contact. In this state, a turning force acts on the ground member with the engagement hole engaged with the engagement projection as a fulcrum, but the engagement bent piece is engaged with the engagement hole of the vertical plate portion. Therefore, the rotation of the ground member is prevented, and the ground member does not come off from the frame member.
【0009】また、アース部材をフレーム部材に組付け
る場合、縦片が水平板部に干渉しないようにアース部材
を傾けて把持して、アース部材の係合穴にフレーム部材
の係合凸部を係合させた後、水平片を水平板部側へ押し
下げる。すると、アース部材は係合凸部に係合している
係合穴を支点として回動するが、このとき、縦片又は水
平片の弾性変形を介して、係合屈曲片の先端部はフレー
ム部材の縦板部を係合穴方向へ摺動する。そして、水平
片が水平板部に当接すると、縦片又は水平片の弾性変形
が解除されて、係合屈曲片が縦板部の係合穴に係合する
とともに縦片が縦板部に当接して、アース部材がフレー
ム部材に組付けられる。When the grounding member is assembled to the frame member, the grounding member is tilted and held so that the vertical piece does not interfere with the horizontal plate portion, and the engaging projection of the frame member is inserted into the engaging hole of the grounding member. After the engagement, the horizontal piece is pushed down to the horizontal plate portion side. Then, the grounding member rotates about the engagement hole engaged with the engagement projection as a fulcrum. At this time, the distal end of the engagement bending piece is framed through the elastic deformation of the vertical piece or the horizontal piece. The vertical plate portion of the member is slid in the direction of the engagement hole. Then, when the horizontal piece contacts the horizontal plate portion, the elastic deformation of the vertical piece or the horizontal piece is released, the engaging bent piece engages with the engagement hole of the vertical plate portion, and the vertical piece contacts the vertical plate portion. The ground member is assembled to the frame member in contact with the frame member.
【0010】請求項2のプリンタの紙送り関連部材用ア
ース構造は、請求項1の発明において、アース部材は、
ステンレス製の薄板材を打抜いて成形加工したものであ
る。それ故、金属製の弾性を有するアース部材を、非常
に簡単且つ安価に製作することができる。その他、請求
項1と同様の作用を奏する。According to a second aspect of the present invention, there is provided a grounding structure for a paper feed-related member of a printer, wherein the grounding member comprises:
It is formed by stamping a stainless steel sheet material. Therefore, a metal elastic member having elasticity can be manufactured very simply and inexpensively. In addition, the same operation as the first aspect is achieved.
【0011】請求項3のプリンタの紙送り関連部材用ア
ース構造は、請求項1又は請求項2の発明において、紙
送り関連部材がローラであり、紙送り関連部材側の導電
部材が金属製のローラ軸であることを特徴とするもので
ある。即ち、アース部材の摺接片にローラのローラ軸を
接触させて、ローラに発生した静電気をローラ軸からア
ース部材を介して金属製のフレーム部材へ逃すことがで
きる。その他請求項1又は請求項2と同様の作用を奏す
る。According to a third aspect of the invention, there is provided a ground structure for a paper feed-related member of the printer according to the first or second aspect of the invention, wherein the paper feed-related member is a roller, and the conductive member on the side of the paper feed-related member is made of metal. It is characterized by being a roller shaft. That is, by bringing the roller shaft of the roller into contact with the sliding contact piece of the ground member, the static electricity generated on the roller can be released from the roller shaft to the metal frame member via the ground member. Other effects are the same as those of the first or second aspect.
【0012】請求項4のプリンタの紙送り関連部材用ア
ース構造は、請求項3の発明において、ローラが送りロ
ーラであることを特徴とするものである。即ち、用紙と
の摩擦接触により送りローラに発生する静電気を、ロー
ラ軸からアース部材を介してフレーム部材へ逃すことが
できるので、静電気によりノイズが発生するのを確実に
防止することができる。その他請求項3と同様の作用を
奏する。A ground structure for a paper feed-related member of a printer according to a fourth aspect is characterized in that, in the invention according to the third aspect, the roller is a feed roller. That is, static electricity generated in the feed roller due to frictional contact with the paper can be released from the roller shaft to the frame member via the ground member, so that noise can be reliably prevented from being generated by the static electricity. Other effects are the same as those of the third aspect.
【0013】請求項5のプリンタの紙送り関連部材用ア
ース構造は、請求項1又は請求項2の発明において、紙
送り関連部材が感光ドラムを含むプロセスユニットであ
り、紙送り関連部材側の導電部材が感光ドラムを含むプ
ロセスユニットに付設された金属片であることを特徴と
するものである。即ち、アース部材の摺接片にプロセス
ユニットの金属片を接触させて、回転ドラムに発生する
静電気を、金属片からアース部材を介してフレーム部材
へ逃すことができるので、静電気が原因で正常な印字作
動が阻止されることがない。According to a fifth aspect of the present invention, there is provided a ground structure for a paper feed related member of the printer according to the first or second aspect of the present invention, wherein the paper feed related member is a process unit including a photosensitive drum, and a conductive member on the side of the paper feed related member. The member is a metal piece attached to a process unit including a photosensitive drum. That is, the metal piece of the process unit is brought into contact with the sliding contact piece of the ground member, and the static electricity generated in the rotating drum can be released from the metal piece to the frame member via the ground member. The printing operation is not blocked.
【0014】[0014]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。本実施形態は、レーザープ
リンタにおいて、送りローラや観光ドラムと転写ローラ
とにより用紙を送りつつ用紙に印字するプロセスユニッ
ト等の紙送り関連部材に発生する静電気を逃すアース構
造に、本発明を適用した場合の例である。但し、本実施
形態のプリンタの紙送り関連部材用アース構造は、レー
ザープリンタに限らず、その他種々のプリンタのアース
構造にも適用できるものである。Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the present invention is applied to a ground structure that discharges static electricity generated in a paper feed-related member such as a process unit that prints on paper while feeding paper by a feed roller or a sightseeing drum and a transfer roller in a laser printer. This is an example of the case. However, the ground structure for the paper feeding related members of the printer of the present embodiment is not limited to the laser printer, but can be applied to the ground structure of various other printers.
【0015】図1〜図3に示すように、レーザープリン
タ1は、本体ケース2と、本体ケース2の後部上面側に
設けられた第1、第2給紙トレイユニット3,4と、本
体ケース2内に設けられた用紙搬送機構15、スキャナ
ユニット20、プロセスユニット30、定着ユニット4
5、用紙搬送機構15とプロセスユニット30と定着ユ
ニット45等を駆動する駆動ユニット50等で構成さ
れ、図4、図5に示すように、駆動ユニット50の上端
部側に、搬送ローラ16,17と、レジストローラ1
8,19と、プロセスユニット30内で用紙に発生した
静電気を夫々逃す為の紙送り関連部材用アース構造(以
下、アース構造という)60,61,80が設けられて
いる。As shown in FIGS. 1 to 3, the laser printer 1 includes a main body case 2, first and second paper feed tray units 3 and 4 provided on a rear upper surface side of the main body case 2, and a main body case 2. 2, a paper transport mechanism 15, a scanner unit 20, a process unit 30, and a fixing unit 4.
5, a drive unit 50 for driving the paper transport mechanism 15, the process unit 30, the fixing unit 45, and the like. As shown in FIGS. 4 and 5, the transport rollers 16, 17 are provided on the upper end side of the drive unit 50. And the registration roller 1
8 and 19, and paper feed related member ground structures (hereinafter referred to as ground structures) 60, 61 and 80 for releasing static electricity generated on the paper in the process unit 30 are provided.
【0016】本体ケース2の前部には、スキャナユニッ
ト20とプロセスユニット30と定着ユニット45等の
プリント機構部の上側を開閉可能に塞ぐトップカバー1
1と、閉成するとトップカバー11の上面に重なり、開
放するとその裏面で本体ケース2から排出されるプリン
ト済みの用紙を受けるようにセットされる排紙トレイ1
2が設けられている。At the front of the main body case 2, a top cover 1 for opening and closing the upper parts of the printing mechanism such as the scanner unit 20, the process unit 30, and the fixing unit 45 is provided.
1 and a discharge tray 1 which is set to receive printed paper discharged from the main body case 2 on its back surface when it is closed and overlaps the upper surface of the top cover 11 when opened.
2 are provided.
【0017】第1給紙トレイユニット3は、トレイ本体
5と、トレイ本体5に開放可能に連結されたトレイカバ
ー6と、トレイ本体5に枢支された用紙受け板7と、ト
レイ本体5の下端部分に回動可能に支持された給紙ロー
ラ8と、用紙受け板7を給紙ローラ8側へ付勢するスプ
リング9等を有し、トレイカバー6を開放すると、リリ
ース機構(図示略)により、用紙受け板7がスプリング
9の付勢力に抗してリリースされ、用紙受け板7上に用
紙をセット可能な状態になる。The first paper feed tray unit 3 includes a tray body 5, a tray cover 6 openably connected to the tray body 5, a paper receiving plate 7 pivotally supported by the tray body 5, It has a paper feed roller 8 rotatably supported at the lower end, a spring 9 for urging the paper receiving plate 7 toward the paper feed roller 8, and the like. When the tray cover 6 is opened, a release mechanism (not shown) is provided. As a result, the sheet receiving plate 7 is released against the urging force of the spring 9, and the sheet can be set on the sheet receiving plate 7.
【0018】給紙ローラ8の軸端には、前記駆動ユニッ
ト50の給紙用駆動ギヤ55a(図6参照)と噛合する
間欠ギヤ8aが装着され、トレイカバー6を閉成した状
態で、駆動ユニット50により間欠ギヤ8aを介して給
紙ローラ8が回動されると、セットされた用紙が給紙さ
れるように構成してある。第2給紙トレイユニット4に
おいては、トレイカバー10以外、前記第1給紙トレイ
ユニット3と略同様の構造であるので、同じものに同一
符号を付し、その説明を省略する。尚、第2給紙トレイ
ユニット4は、ケース本体2に着脱可能に装着されると
ともに、手ざしにて用紙をトレイカバー10の案内面1
0aから挿入口10bへ挿入して給紙できるように構成
してある。An intermittent gear 8a meshing with a paper feed drive gear 55a (see FIG. 6) of the drive unit 50 is attached to the shaft end of the paper feed roller 8, and the drive is performed with the tray cover 6 closed. When the paper feed roller 8 is rotated by the unit 50 via the intermittent gear 8a, the set paper is fed. The second paper feed tray unit 4 has substantially the same structure as the first paper feed tray unit 3 except for the tray cover 10, so the same components are denoted by the same reference numerals and description thereof is omitted. The second paper feed tray unit 4 is detachably mounted on the case main body 2, and the paper is manually fed to the guide surface 1 of the tray cover 10.
It is configured so that paper can be fed by inserting the paper into the insertion opening 10b from 0a.
【0019】図2に示すように、用紙搬送機構15は、
第1,第2給紙トレイユニット3,4から給紙された用
紙をプロセスユニット30へ搬送する為のもので、第1
給紙トレイユニット3の下端前側に設けられた1対の搬
送ローラ16,17と、第2給紙トレイユニット4の下
端前側に設けられた1対のレジストローラ18,19と
を有している。第2給紙トレイユニット4から給紙され
た用紙は、直接レジストローラ18,19へ搬送される
が、第1給紙トレイユニット3から給紙された用紙は、
先ず、搬送ローラ16,17により第2給紙トレイユニ
ット4の下面側の搬送路15aを通ってレジストローラ
18,19へ搬送され、その後、レジストローラ18,
19により、用紙をある程度撓ませてレジストした後、
搬送路15bを通ってプロセスユニット30内へ搬送さ
れる。As shown in FIG. 2, the paper transport mechanism 15
This is for transporting paper fed from the first and second paper feed tray units 3 and 4 to the process unit 30.
It has a pair of conveying rollers 16 and 17 provided on the lower front side of the paper feed tray unit 3 and a pair of registration rollers 18 and 19 provided on the lower front side of the second paper feed unit 4. . The paper fed from the second paper feed tray unit 4 is directly conveyed to the registration rollers 18 and 19, while the paper fed from the first paper feed tray unit 3 is
First, the sheet is conveyed to the registration rollers 18 and 19 by the conveyance rollers 16 and 17 through the conveyance path 15a on the lower surface side of the second sheet feed tray unit 4, and thereafter, the registration rollers 18 and 19 are conveyed.
19, after the paper is bent to some extent and registered,
It is transported into the process unit 30 through the transport path 15b.
【0020】スキャナユニット20は、プロセスユニッ
ト30の略下側に設けられており、レーザー発光部(図
示略)、ポリゴンミラー21、反射鏡22,24、レン
ズ23等を有し、レーザー発光部から発光されたレーザ
ービームを、鎖線で示すように、ポリゴンミラー21、
反射鏡22、レンズ23、反射鏡24を介して、プロセ
スユニット30の回転する感光ドラム32の外周部に、
高速走査にて照射し露光することで、静電潜像が形成さ
れる。The scanner unit 20 is provided substantially below the process unit 30 and has a laser emitting unit (not shown), a polygon mirror 21, reflecting mirrors 22, 24, a lens 23, and the like. The emitted laser beam is represented by a polygon mirror 21 as indicated by a chain line.
Via the reflecting mirror 22, the lens 23, and the reflecting mirror 24, on the outer peripheral portion of the rotating photosensitive drum 32 of the process unit 30,
By irradiating and exposing by high-speed scanning, an electrostatic latent image is formed.
【0021】プロセスユニット30は、ケーシング31
内に、感光ドラム32、転写ローラ33、現像ローラ3
4、クリーニングローラ35、トナー供給ローラ36、
トナーボックス37、スコロトロン型帯電体40等を内
蔵し、図3に示すように、本体ケース2に着脱可能なカ
ートリッジ構造であり、プリンタ本体2から取外した状
態で、トナーボックス37を交換できるように構成さ
れ、ケーシング31の用紙搬出口の近傍には、金属箔
(図示せず)が設けられており、更にケーシング31の
左端面には、金属箔に接触する針金32aが僅かに突出
して設けられている。The process unit 30 includes a casing 31
The photosensitive drum 32, the transfer roller 33, the developing roller 3
4, cleaning roller 35, toner supply roller 36,
As shown in FIG. 3, the cartridge box has a built-in toner box 37, a scorotron-type charged body 40, and the like, and is detachable from the main body case 2, so that the toner box 37 can be replaced while being removed from the printer main body 2. A metal foil (not shown) is provided near the paper outlet of the casing 31, and a wire 32 a is provided on the left end surface of the casing 31 so as to be slightly in contact with the metal foil. ing.
【0022】トナーボックス37内のトナーは、攪拌体
38で攪拌されて放出された後、トナー供給ローラ36
を介して現像ローラ34に供給され、ブレード39によ
り一定厚さのトナー層として現像ローラ34に担持され
て、感光ドラム32に供給される。感光ドラム32の静
電潜像は、現像ローラ34からトナーが付着することに
より顕像化され、感光ドラム32と転写ローラ33との
間を通る用紙に転写されるとともに、感光ドラム32と
転写ローラ33により、転写された用紙はプロセスユニ
ット30から排出され定着ユニット45内へ搬送され
る。感光ドラム32上に残ったトナーはクリーニングロ
ーラ35で一時的に回収された後、所定のタイミングで
感光ドラム32を介して、現像ローラ34に回収され
る。The toner in the toner box 37 is agitated by the agitator 38 and released.
The toner image is supplied to the developing roller 34 via the developing roller 34, is carried by the developing roller 34 as a toner layer having a constant thickness by the blade 39, and is supplied to the photosensitive drum 32. The electrostatic latent image on the photosensitive drum 32 is visualized by toner attached from the developing roller 34, transferred to a sheet passing between the photosensitive drum 32 and the transfer roller 33, and By 33, the transferred sheet is discharged from the process unit 30 and conveyed into the fixing unit 45. After the toner remaining on the photosensitive drum 32 is temporarily collected by the cleaning roller 35, the toner is collected by the developing roller 34 via the photosensitive drum 32 at a predetermined timing.
【0023】定着ユニット45は、プロセスユニット3
0において用紙に付着させたトナーを定着させる為のも
ので、加熱ローラ46と、加熱ローラ46に押圧された
押圧ローラ47と、これらローラ46,47の下流側に
設けられ、用紙を本体ケース2の外部へ排出する1対の
排出ローラ48,49を有している。The fixing unit 45 includes the process unit 3
0, for fixing the toner adhering to the sheet, and provided with a heating roller 46, a pressing roller 47 pressed by the heating roller 46, and a downstream side of these rollers 46, 47. Has a pair of discharge rollers 48 and 49 for discharging the sheet to the outside.
【0024】図3〜図5に示すように、駆動ユニット5
0は、左右1対の側板52,53を有する金属製のギヤ
取付けフレーム51と、ギヤ取付けフレーム51に取付
けられ第1〜第3駆動系55〜57等を構成する複数の
ギヤと、これら駆動系55〜57の駆動源である電動モ
ータ54を有し、ギヤ取付けフレーム51を金属製の基
板2aにボルト等で固定して、本体ケース2内の左端部
分に設けられている。As shown in FIG. 3 to FIG.
Reference numeral 0 denotes a metal gear mounting frame 51 having a pair of left and right side plates 52 and 53, a plurality of gears mounted on the gear mounting frame 51 to form the first to third drive systems 55 to 57, and the like. It has an electric motor 54 as a drive source for the systems 55 to 57, and the gear mounting frame 51 is fixed to the metal substrate 2a with bolts or the like, and provided at the left end portion in the main body case 2.
【0025】第1駆動系55は、第1給紙トレイユニッ
ト3の給紙ギヤ8aと搬送ローラ16のローラ軸16a
の左端部分に固着されたローラギヤ16bを回動し、第
2駆動系56は、第2給紙トレイユニット4の給紙ギヤ
8aとレジストローラ18のローラ軸18a左端部分に
固着されたローラギヤ18bを回動し、第3駆動系57
は、プロセスユニット30と定着ユニット45を駆動す
る為のものである。The first drive system 55 includes a feed gear 8a of the first feed tray unit 3 and a roller shaft 16a of the transport roller 16.
The second drive system 56 rotates the sheet feeding gear 8a of the second sheet feeding tray unit 4 and the roller gear 18b fixed to the left end of the roller shaft 18a of the registration roller 18. Rotate, and the third drive system 57
Is for driving the process unit 30 and the fixing unit 45.
【0026】次に、アース構造60,61,80につい
て説明する。但し、アース構造60,61は略同様の構
成であるので、アース構造60について説明し、アース
構造61の説明を省略する。Next, the ground structures 60, 61 and 80 will be described. However, since the ground structures 60 and 61 have substantially the same configuration, the ground structure 60 will be described and the description of the ground structure 61 will be omitted.
【0027】図6に示すように、アース構造60は、搬
送ローラ16の左端側に位置する駆動ユニット50のギ
ヤ取付けフレーム51の右側板53に、ステンレス製の
弾性を有するアース部材70を組付け、このアース部材
70の摺接片74に搬送ローラ16のローラ軸16aの
左端部を接触させて、搬送ローラ16,17に発生した
静電気を、ローラ軸16aからアース部材70、ギヤ取
付けフレーム51、接地された金属製基板2aへと逃し
てアースするように構成されている。As shown in FIG. 6, the grounding structure 60 has a stainless steel grounding member 70 mounted on the right side plate 53 of the gear mounting frame 51 of the drive unit 50 located on the left end side of the transport roller 16. By contacting the left end of the roller shaft 16a of the transport roller 16 with the sliding contact piece 74 of the ground member 70, the static electricity generated on the transport rollers 16, 17 is discharged from the roller shaft 16a to the ground member 70, the gear mounting frame 51, It is configured to escape to the grounded metal substrate 2a and ground.
【0028】図6〜図9に示すように、アース構造60
において、ギヤ取付けフレーム51の右側板53には、
縦板部62と、この縦板部62の上端から左方向に屈曲
形成した水平板部63と、この水平板部63の自由端に
水平に突設された係合凸部64と、縦板部62に形成さ
れた係合穴65が設けられている。一方、アース部材7
0は、水平板部63に当接される水平片71と、この水
平片71から縦板部62に当接して下方へ延び下端部に
前記係合穴65に係合する係合屈曲片73を有する縦片
72と、水平板部63の自由端付近で水平片71から立
上がった摺接片74と、この摺接片74から一体的に下
方へ延び前記係合凸部64が係合する係合穴76を設け
た係合片75とを有している。ここで、前記アース部材
70は、ステンレス製の薄板材を打抜いて成形加工した
ものであるが、図10のように打抜き成形された後、鎖
線で示す部分を屈曲させて、図6〜図9に示す形状に加
工される。As shown in FIG. 6 to FIG.
In the right side plate 53 of the gear mounting frame 51,
A vertical plate portion 62, a horizontal plate portion 63 bent leftward from an upper end of the vertical plate portion 62, an engaging projection 64 projecting horizontally from a free end of the horizontal plate portion 63, An engagement hole 65 formed in the portion 62 is provided. On the other hand, the earth member 7
Reference numeral 0 denotes a horizontal piece 71 which is in contact with the horizontal plate portion 63, and an engagement bent piece 73 which extends downward from this horizontal piece 71 in contact with the vertical plate portion 62 and engages with the engagement hole 65 at the lower end. , A sliding piece 74 that rises from the horizontal piece 71 near the free end of the horizontal plate 63, and extends downward from the sliding piece 74 integrally with the engaging projection 64. And an engagement piece 75 provided with an engagement hole 76 that is formed. Here, the ground member 70 is formed by stamping and forming a stainless steel sheet material. After stamping and forming as shown in FIG. 10, the portion indicated by a chain line is bent, and FIG. It is processed into the shape shown in FIG.
【0029】そして、アース部材70は、その水平片7
1,縦片72を夫々水平板部63,縦板部62に当接さ
せ、係合片75の係合穴76に係合凸部64を係合させ
るとともに、係合屈曲片73を縦板部62の係合穴65
に係合させた状態で組付けられている。前記摺接片74
の中央部にはローラ軸16aの端面に接触する凸部74
aが形成され、また、摺接片74の前後両端部は、右側
へ屈曲した1対の屈曲部74bに夫々形成されるととも
に、摺接片74の上部側には、左上方へ延びる押圧部7
4cが形成されている。従って、ローラ軸16aが上方
から組付けられるとき、ローラ軸16aの端部が1対の
屈曲部74bにガイドされつつ、押圧部74cを介して
摺接片74を弾性変形させて、摺接片74の凸部74a
がローラ軸16aの端面に確実に接触するようになって
いる。The grounding member 70 has a horizontal piece 7
1, the vertical piece 72 is brought into contact with the horizontal plate portion 63 and the vertical plate portion 62, respectively, so that the engaging projection 64 is engaged with the engaging hole 76 of the engaging piece 75, and the engaging bent piece 73 is Engagement hole 65 of part 62
Is assembled in a state of being engaged with. The sliding contact piece 74
A convex portion 74 that contacts the end surface of the roller shaft 16a
The sliding contact piece 74 is formed with a pair of bent portions 74b bent to the right, and the sliding contact piece 74 is formed on the upper side of the sliding contact piece 74. Part 7
4c is formed. Accordingly, when the roller shaft 16a is assembled from above, the sliding contact piece 74 is elastically deformed via the pressing portion 74c while the end of the roller shaft 16a is guided by the pair of bent portions 74b, so that the sliding contact piece 74 74 convex portion 74a
Are surely in contact with the end face of the roller shaft 16a.
【0030】このアース構造60の作用について説明す
ると、用紙との摩擦接触により搬送ローラ16,17に
発生した静電気を、搬送ローラ16のローラ軸16aか
らアース部材70、ギヤ取付けフレーム51、金属製基
板2aへと逃してアースする。ローラ軸16aの端部が
摺接片74に接触している状態では、係合凸部64に係
合している係合穴76を支点として、アース部材70に
は回動力が作用するが、係合屈曲片73が縦板部62の
係合穴65へ係合しているため、アース部材70の回動
が阻止されて、アース部材70がギヤ取付けフレーム5
1から外れることがない。The operation of the grounding structure 60 will be described. Static electricity generated in the transport rollers 16 and 17 due to frictional contact with paper is transferred from the roller shaft 16a of the transport roller 16 to the ground member 70, the gear mounting frame 51, and the metal substrate. 2a to earth. In a state where the end of the roller shaft 16a is in contact with the sliding contact piece 74, a turning force acts on the ground member 70 with the engagement hole 76 engaged with the engagement projection 64 as a fulcrum. Since the engaging bent piece 73 is engaged with the engaging hole 65 of the vertical plate portion 62, the rotation of the ground member 70 is prevented, and the ground member 70 is
It does not deviate from 1.
【0031】アース部材70をギヤ取付けフレーム51
に組付ける場合、縦片72が水平板部63に干渉しない
ようにアース部材70を傾けて把持して、アース部材7
0の係合穴76に係合凸部64を係合させた後、水平片
71を水平板部63側へ押し下げる。すると、アース部
材70は係合凸部64に係合している係合穴76を支点
として回動するが、このとき、縦片72又は水平片71
の弾性変形を介して、係合屈曲片73の先端部は縦板部
62を係合穴65方向へ摺動する。そして、水平片71
が水平板部63に当接すると、縦片72又は水平片71
の弾性変形が解除されて、係合屈曲片73が縦板部62
の係合穴65に係合するとともに縦片72が縦板部62
に当接して、アース部材70が組付けられる。The ground member 70 is connected to the gear mounting frame 51.
In the case of assembling, the ground member 70 is tilted and held so that the vertical piece 72 does not interfere with the horizontal
After the engaging projection 64 is engaged with the 0 engaging hole 76, the horizontal piece 71 is pushed down to the horizontal plate 63 side. Then, the ground member 70 rotates about the engagement hole 76 engaged with the engagement projection 64 as a fulcrum.
The distal end portion of the engagement bending piece 73 slides in the vertical plate portion 62 in the direction of the engagement hole 65 through the elastic deformation of. And the horizontal piece 71
Abuts on the horizontal plate 63, the vertical piece 72 or the horizontal piece 71
Elastic deformation of the vertical plate portion 62 is released.
And the vertical piece 72 is engaged with the vertical plate portion 62.
, And the ground member 70 is assembled.
【0032】このように、アース構造60によれば、ア
ース部材70をギヤ取付けフレーム51にボルトやビス
等で固定しなくても、アース部材70の係合穴76に係
合凸部64を係合させ、水平片71を水平板部63側へ
押し下げるだけで、アース部材70をワンタッチ的に組
付けることができ、また、ギヤ取付けフレーム51が金
属製であるため、ギヤ取付けフレーム51とアース部材
70を別途リード線等で接続する必要もないため、アー
ス構造60の部材数を減らし簡単化できるとともに、ア
ース部材70のギヤ取付けフレーム51への組付け作業
を簡単化でき、アース構造60のコストを著しく低減す
ることができる。しかも、アース部材70は、ステンレ
ス製の薄板材を打抜いて成形加工したものであるので、
金属製の弾性を有するアース部材70を、非常に簡単且
つ安価に製作できる。As described above, according to the grounding structure 60, the engaging projection 64 is engaged with the engaging hole 76 of the grounding member 70 without fixing the grounding member 70 to the gear mounting frame 51 with bolts or screws. By simply pressing the horizontal piece 71 down to the horizontal plate portion 63, the ground member 70 can be assembled in one-touch operation. Further, since the gear mounting frame 51 is made of metal, the gear mounting frame 51 and the ground member Since there is no need to separately connect the grounding member 70 with a lead wire or the like, the number of members of the grounding structure 60 can be reduced and simplified, and the work of assembling the grounding member 70 to the gear mounting frame 51 can be simplified, and the cost of the grounding structure 60 can be reduced. Can be significantly reduced. In addition, since the ground member 70 is formed by stamping a stainless steel sheet material,
The metal elastic member 70 having elasticity can be manufactured very simply and at low cost.
【0033】次に、アース構造80について説明する。
図3、図5に示すように、アース構造80は、駆動ユニ
ット50のギヤ取付けフレーム51の左側板52に、ス
テンレス製の弾性を有するアース部材90を組付け、こ
のアース部材90にプロセスユニット30の針金32a
を接触させて、プロセスユニット30内で発生した静電
気を、プロセスユニット30の用紙排出口近傍部に設け
られた金属箔及び針金32aからアース部材90、ギヤ
取付けフレーム51、接地された金属製基板2aへと逃
してアースするように構成されている。Next, the ground structure 80 will be described.
As shown in FIGS. 3 and 5, the ground structure 80 has a stainless steel elastic member 90 mounted on the left side plate 52 of the gear mounting frame 51 of the drive unit 50, and the process unit 30 is attached to the ground member 90. Wire 32a
Are contacted, the static electricity generated in the process unit 30, the paper discharge opening neighborhood portion metal foil and wire 32a or Raa chromatography provided to the scan member 90 of the process unit 30, a gear mounting frame 51, a grounded metal It is configured to escape to the substrate 2a and be grounded.
【0034】図11〜図13に示すように、ギヤ取付け
フレーム51の左側板52には、縦板部82と、この縦
板部82の上端から水平方向右方に屈曲形成した水平板
部83と、この水平板部83の自由端に水平に突設され
た係合凸部84と、縦板部82に形成された係合穴85
が設けられている。アース部材90は、水平板部83に
当接される水平片91と、この水平片91から縦板部8
2に当接して下方へ延び下端部に前記係合穴85に係合
する係合屈曲片93を有する縦片92と、水平板部83
の自由端付近で水平片から立上がった摺接片94と、こ
の摺接片94から一体的に下方へ延び前記係合凸部84
が係合する係合穴96を設けた係合片95とを有してい
る。As shown in FIGS. 11 to 13, the left side plate 52 of the gear mounting frame 51 has a vertical plate portion 82 and a horizontal plate portion 83 which is bent rightward in the horizontal direction from the upper end of the vertical plate portion 82. An engagement projection 84 horizontally protruding from a free end of the horizontal plate 83; and an engagement hole 85 formed in the vertical plate 82.
Is provided. The grounding member 90 includes a horizontal piece 91 that is in contact with the horizontal plate portion 83, and a vertical plate portion 8 from the horizontal piece 91.
A vertical piece 92 having an engagement bent piece 93 at the lower end thereof which abuts on the lower end 2 and engages with the engagement hole 85;
A sliding piece 94 which rises from the horizontal plate near the free end of the engagement projection 84 extends integrally downward from the sliding piece 94
And an engagement piece 95 provided with an engagement hole 96 with which the engagement piece 95 engages.
【0035】摺接片94は、水平片91から上方へ延び
る縦片部94aと、縦片部94aの上端部から前後並列
状に右下方へ延び針金32aに押圧される押圧部94b
と、押圧部94bの先端部から屈曲部94dを介して左
下方へ延びる屈曲片部94cを有し、屈曲部94dがプ
ロセスユニット30の針金32aに接触する。そして、
アース部材90は、その水平片91,縦片92を夫々水
平板部83,縦板部82に当接させ、係合片95の係合
穴96に係合凸部84を係合させるとともに、係合屈曲
片93を縦板部82の係合穴85に係合させた状態で組
付けられている。前記アース部材90は、ステンレス製
の薄板材を打抜いて成形加工したものであるが、図14
のように打抜き成形された後、鎖線で示す部分を屈曲さ
せて、組付け可能な形状に加工される。The sliding contact piece 94 includes a vertical piece 94a extending upward from the horizontal piece 91, and a pressing portion 94b extending downward and rightward from the upper end of the vertical piece 94a in a front-rear direction and pressed by the wire 32a.
And a bent piece portion 94c extending downward and leftward from the distal end portion of the pressing portion 94b via the bent portion 94d, and the bent portion 94d contacts the wire 32a of the process unit 30. And
The grounding member 90 causes the horizontal piece 91 and the vertical piece 92 to abut against the horizontal plate portion 83 and the vertical plate portion 82, respectively, and engages the engagement projections 84 with the engagement holes 96 of the engagement pieces 95. The engagement bending piece 93 is assembled in a state where the engagement bending piece 93 is engaged with the engagement hole 85 of the vertical plate portion 82. The ground member 90 is formed by stamping and forming a stainless steel sheet material.
After being punched and formed as described above, the portion indicated by the chain line is bent and processed into a shape that can be assembled.
【0036】アース構造80の作用について説明する
と、前述のように、トップカバー11と排紙トレイ12
を開放した状態で、プロセスユニット30は本体ケース
2内の所定部位に着脱可能であるが、図3に示すよう
に、プロセスユニット30が本体ケース2内に装着され
ると、プロセスユニット30の用紙排出口の付近に設置
されている金属箔に接触する針金32aが、アース部材
90の摺接片94に接触して、用紙に発生した静電気
を、金属箔と針金32aからアース部材90、ギヤ取付
けフレーム51、金属製基板2aへと逃してアースす
る。The operation of the ground structure 80 will be described. As described above, the top cover 11 and the paper discharge tray 12
When the process unit 30 is mounted in the main body case 2 as shown in FIG. 3, the paper of the process unit 30 The wire 32a contacting the metal foil provided near the discharge port contacts the sliding contact piece 94 of the ground member 90, and the static electricity generated on the paper is removed from the metal foil and the wire 32a to the ground member 90 and the gear. The frame 51 is escaped to the metal substrate 2a and grounded.
【0037】このアース構造80によれば、前記アース
構造60におけるアース部材70の組付け作業同様、ア
ース部材90をギヤ取付けフレーム51にボルトやビス
等で固定しなくても、アース部材90の係合穴96に係
合凸部84を係合させ、水平片91を水平板部83側へ
押し下げるだけで、アース部材90をワンタッチ的に組
付けることができ、ギヤ取付けフレーム51とアース部
材70を別途リード線等で接続する必要もないので、ア
ース構造90のコストを著しく低減でき、しかも、アー
ス部材90は、ステンレス製の薄板材を打抜いて成形加
工したものであるので、金属製の弾性を有するアース部
材90を、非常に簡単且つ安価に製作できる。According to the grounding structure 80, similarly to the work of assembling the grounding member 70 in the grounding structure 60, even if the grounding member 90 is not fixed to the gear mounting frame 51 with bolts, screws, etc. The grounding member 90 can be assembled in one-touch only by engaging the engaging projection 84 with the mating hole 96 and pushing down the horizontal piece 91 to the horizontal plate portion 83 side. Since there is no need to separately connect with a lead wire or the like, the cost of the grounding structure 90 can be significantly reduced. In addition, since the grounding member 90 is formed by stamping and forming a thin stainless steel plate, the metal elasticity is reduced. Can be manufactured very simply and inexpensively.
【0038】尚、前記アース構造60,61,80にお
いては、搬送ローラ16〜19、針金32aに限らず、
給紙ローラ等その他の紙送り関連部材に発生した静電気
を逃すように構成してもよい。In the grounding structures 60, 61 and 80, not only the transport rollers 16 to 19 and the wire 32a but also
A configuration may be adopted in which static electricity generated in other paper feed-related members such as a paper feed roller is released.
【0039】[0039]
【発明の効果】請求項1のプリンタの紙送り関連部材用
アース構造によれば、縦片が水平板部に干渉しないよう
にアース部材を傾けて把持して、アース部材の係合穴に
フレーム部材の係合凸部を係合させた後、水平片を水平
板部側へ押し下げると、縦片又は水平片の弾性変形を介
して、係合屈曲片の先端部がフレーム部材の縦板部を係
合穴方向へ摺動しながら、アース部材が係合凸部に係合
している係合穴を支点として回動し、その後、水平片が
水平板部に当接すると、係合屈曲片が縦板部の係合穴に
係合するとともに縦片が縦板部に当接して、アース部材
がフレーム部材に組付けられる。According to the grounding structure for the paper feed-related member of the printer according to the first aspect, the grounding member is tilted and held so that the vertical piece does not interfere with the horizontal plate portion, and the frame is inserted into the engaging hole of the grounding member. After engaging the engaging projection of the member, the horizontal piece is pushed down to the horizontal plate portion side, and the elastic bending of the vertical piece or the horizontal piece causes the distal end of the engaging bent piece to become the vertical plate portion of the frame member. While sliding in the direction of the engaging hole, the ground member rotates about the engaging hole engaged with the engaging convex portion, and then, when the horizontal piece contacts the horizontal plate portion, the engaging bending is performed. The piece engages with the engagement hole of the vertical plate portion and the vertical piece contacts the vertical plate portion, so that the ground member is assembled to the frame member.
【0040】このように、アース部材の係合穴にフレー
ム部材の係合凸部を係合し、水平片を水平板部側へ押し
下げるだけで、アース部材をフレーム部材にワンタッチ
的に組付けることができる。しかも、アース部材が一旦
フレーム部材に組付けられると、摺接片に導電部材から
の押圧力が作用しても、係合凸部に係合している係合穴
を支点としてアース部材には回動力が作用するが、係合
屈曲片の縦板部の係合穴への係合によりアース部材の回
動が阻止されるので、アース部材がフレーム部材から外
れることもない。即ち、アース部材をフレーム部材にボ
ルトやビス等で固定する必要もなく、また、フレーム部
材が金属製であるため、フレーム部材とアース部材を別
途リード線等で接続する必要もないので、プリンタの紙
送り関連部材用アース構造の部材数を減らしその製造コ
ストも著しく低減できる。As described above, the ground member is assembled to the frame member in one-touch only by engaging the engaging projection of the frame member with the engaging hole of the ground member and pushing down the horizontal piece toward the horizontal plate portion. Can be. Moreover, once the grounding member is assembled to the frame member, even if a pressing force from the conductive member acts on the sliding contact piece, the grounding member is provided with the engaging hole engaged with the engaging projection as a fulcrum. Although the rotating force acts, the rotation of the ground member is prevented by the engagement of the engagement bent piece with the engagement hole of the vertical plate portion, so that the ground member does not come off from the frame member. That is, there is no need to fix the ground member to the frame member with bolts or screws, and since the frame member is made of metal, there is no need to connect the frame member and the ground member separately with a lead wire or the like. The number of members of the ground structure for the paper feed related members can be reduced, and the manufacturing cost can be significantly reduced.
【0041】請求項2のプリンタの紙送り関連部材用ア
ース構造によれば、請求項1と同様の効果を奏するが、
アース部材は、ステンレス製の薄板材を打抜いて成形加
工したものであるので、金属製の弾性を有するアース部
材を、非常に簡単且つ安価に製作することができる。According to the grounding structure for a paper feed-related member of the printer of the second aspect, the same effect as that of the first aspect can be obtained.
Since the ground member is formed by stamping a stainless steel sheet material, a metal elastic ground member having elasticity can be manufactured very simply and at low cost.
【0042】請求項3のプリンタの紙送り関連部材用ア
ース構造によれば、請求項1又は請求項2と同様の効果
を奏するが、紙送り関連部材がローラであり、紙送り関
連部材側の導電部材が金属製のローラ軸であるので、ア
ース部材の摺接片にローラのローラ軸を接触させて、ロ
ーラに発生した静電気をローラ軸からアース部材を介し
て金属製のフレーム部材へ逃すことができる。According to the earth structure for the paper feed related member of the printer of the third aspect, the same effect as in the first or second aspect can be obtained, but the paper feed related member is a roller and the paper feed related member side Since the conductive member is a metal roller shaft, the roller shaft of the roller is brought into contact with the sliding contact piece of the ground member, and static electricity generated on the roller is released from the roller shaft to the metal frame member via the ground member. Can be.
【0043】請求項4のプリンタの紙送り関連部材用ア
ース構造によれば、請求項3と同様の効果を奏するが、
ローラが送りローラであるので、用紙との摩擦接触によ
り送りローラに発生する静電気を、ローラ軸からアース
部材を介してフレーム部材へ逃すことができるので、静
電気によりノイズが発生するのを確実に防止できる。According to the grounding structure for the paper feeding related member of the printer of the fourth aspect, the same effect as that of the third aspect can be obtained.
Since the roller is a feed roller, static electricity generated by the feed roller due to frictional contact with the paper can be released from the roller shaft to the frame member via the ground member, so that noise due to static electricity is reliably prevented. it can.
【0044】請求項5のプリンタの紙送り関連部材用ア
ース構造によれば、請求項1又は請求項2と同様の効果
を奏するが、紙送り関連部材が感光ドラムを含むプロセ
スユニットであり、紙送り関連部材側の導電部材が感光
ドラムを含むプロセスユニットに付設された金属片であ
るので、アース部材の摺接片に金属片を接触させて、プ
ロセスユニット内で用紙に発生する静電気を、金属片か
らアース部材を介してフレーム部材へ逃すことができる
ので、静電気が原因で正常な印字作動が阻止されること
がない。According to the grounding structure for a paper feed-related member of the printer according to the fifth aspect, the same effect as that of the first or second aspect is obtained, but the paper feed-related member is a process unit including a photosensitive drum, and Since the conductive member on the feed-related member side is a metal piece attached to the process unit including the photosensitive drum, the metal piece is brought into contact with the sliding contact piece of the ground member, and the static electricity generated on the paper in the process unit is reduced by the metal. Since the piece can escape to the frame member via the ground member, normal printing operation is not prevented due to static electricity.
【図1】本発明の実施形態に係るプリンタの紙送り関連
部材用アース構造を備えたレーザープリンタの斜視図で
ある。FIG. 1 is a perspective view of a laser printer having a ground structure for a paper feed-related member of a printer according to an embodiment of the present invention.
【図2】図1のレーザープリンタの縦断面図である。FIG. 2 is a longitudinal sectional view of the laser printer of FIG.
【図3】図2のIII −III 線断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 2;
【図4】レーザープリンタの駆動ユニットの左側面図で
ある。FIG. 4 is a left side view of a drive unit of the laser printer.
【図5】図4の駆動ユニットの平面図である。FIG. 5 is a plan view of the drive unit of FIG.
【図6】アース構造の分解斜視図である。FIG. 6 is an exploded perspective view of a ground structure.
【図7】図6のアース構造の平面図である。FIG. 7 is a plan view of the ground structure shown in FIG. 6;
【図8】図6のアース構造の正面図である。FIG. 8 is a front view of the ground structure shown in FIG. 6;
【図9】図6のアース構造の左側面図である。FIG. 9 is a left side view of the ground structure shown in FIG. 6;
【図10】アース部材の打抜き成形直後の側面図であ
る。FIG. 10 is a side view of the ground member immediately after stamping.
【図11】他のアース構造の平面図である。FIG. 11 is a plan view of another ground structure.
【図12】図11のアース構造の正面図である。FIG. 12 is a front view of the ground structure of FIG. 11;
【図13】図11のアース構造の右側面図である。FIG. 13 is a right side view of the ground structure shown in FIG. 11;
【図14】アース部材の打抜き成形直後の側面図であ
る。FIG. 14 is a side view of the ground member immediately after stamping and forming.
1 レーザープリンタ 16,17 搬送ローラ 18,19 レジストローラ 16a,18a ローラ軸 30 プロセスユニット 32 感光ドラム 32a 針金 51 ギヤ取付けフレーム(フレーム部
材) 60,61,80 プリンタの紙送り関連部材用アース
構造 62,82 縦板部 63,83 水平板部 64,84 係合凸部 65,85 係合穴 70,90 アース部材 71,91 水平片 72,92 縦片 73,93 係合屈曲片 74,94 摺接片 75,95 係合片 76,96 係合穴REFERENCE SIGNS LIST 1 laser printer 16, 17 transport roller 18, 19 registration roller 16 a, 18 a roller shaft 30 process unit 32 photosensitive drum 32 a wire 51 gear mounting frame (frame member) 60, 61, 80 printer paper feed-related member ground structure 62, 82 Vertical plate portion 63,83 Horizontal plate portion 64,84 Engagement convex portion 65,85 Engagement hole 70,90 Ground member 71,91 Horizontal piece 72,92 Vertical piece 73,93 Engagement bent piece 74,94 Sliding contact Piece 75,95 engagement piece 76,96 engagement hole
Claims (5)
電気を逃す為のアース構造において、 前記紙送り関連部材の一端側に位置する金属製のフレー
ム部材に、縦板部と、この縦板部の上端から水平方向に
屈曲形成した水平板部と、この水平板部の自由端に水平
に突設された係合凸部と、縦板部に形成された係合穴と
を設け、 前記水平板部に当接される水平片と、この水平片から縦
板部に当接して下方へ延び下端部に前記係合穴に係合す
る係合屈曲片を有する縦片と、水平板部の自由端付近で
水平片から立上がった摺接片と、この摺接片から一体的
に延び前記係合凸部が係合する係合穴を設けた係合片と
を有する金属製の弾性を有するアース部材を設け、 前記アース部材の摺接片に紙送り関連部材側の導電部材
を接触させてその導電部材からアース部材を介して金属
製のフレーム部材へ静電気を逃すように構成したことを
特徴とするプリンタの紙送り関連部材用アース構造。1. A grounding structure for releasing static electricity generated in a paper feed related member of a printer, wherein a metal frame member located at one end side of the paper feed related member has a vertical plate portion, and a vertical plate portion. A horizontal plate portion bent in a horizontal direction from an upper end of the horizontal plate portion, an engagement protrusion formed to protrude horizontally at a free end of the horizontal plate portion, and an engagement hole formed in a vertical plate portion. A horizontal piece contacting the plate portion, a vertical piece having an engagement bent piece extending downward from the horizontal piece to abut against the vertical plate portion and engaging the engagement hole at a lower end portion; a sliding piece rises from the horizontal plate near the free end, a metallic elasticity the engagement projection extending this sliding piece or al integrally has an engagement piece provided with an engaging hole which engages A conductive member on the paper feed related member side is brought into contact with a sliding contact piece of the ground member, and the conductive member is An earth structure for a paper feed-related member of a printer, wherein static electricity is released to a metal frame member via an earth member.
材を打抜いて成形加工したものであることを特徴とする
請求項1に記載のプリンタの紙送り関連部材用アース構
造。2. The grounding structure for a paper feed-related member of a printer according to claim 1, wherein said grounding member is formed by stamping and forming a thin stainless steel plate.
送り関連部材側の導電部材が金属製のローラ軸であるこ
とを特徴とする請求項1又は請求項2に記載のプリンタ
の紙送り関連部材用アース構造。Wherein a said paper feed associated member roller, paper printer according to claim 1 or claim 2 conductive member of the paper feed associated member side is characterized by a metal roller shaft Ground structure for feed-related members.
ることを特徴とする請求項3に記載のプリンタの紙送り
関連部材用アース構造。4. The grounding structure for a paper feed-related member of a printer according to claim 3, wherein said roller is a feed roller for feeding paper.
プロセスユニットであり、紙送り関連部材側の導電部材
が感光ドラムを含むプロセスユニットに付設された金属
片であることを特徴とする請求項1又は請求項2に記載
のプリンタの紙送り関連部材用アース構造。5. The paper feed-related member is a process unit including a photosensitive drum, and the conductive member on the paper feed-related member side is a metal piece attached to the process unit including the photosensitive drum. An earth structure for a paper feed-related member of a printer according to claim 1 or 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08298182A JP3090256B2 (en) | 1996-10-21 | 1996-10-21 | Ground structure for paper feed related members of printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08298182A JP3090256B2 (en) | 1996-10-21 | 1996-10-21 | Ground structure for paper feed related members of printer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10120228A JPH10120228A (en) | 1998-05-12 |
JP3090256B2 true JP3090256B2 (en) | 2000-09-18 |
Family
ID=17856284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP08298182A Expired - Fee Related JP3090256B2 (en) | 1996-10-21 | 1996-10-21 | Ground structure for paper feed related members of printer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3090256B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD699343S1 (en) | 2011-12-20 | 2014-02-11 | Alcon Research, Ltd. | Irrigation solution bag |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4809093B2 (en) * | 2006-03-28 | 2011-11-02 | 京セラミタ株式会社 | Grounding structure and image forming apparatus employing the grounding structure |
JP5241386B2 (en) * | 2008-09-03 | 2013-07-17 | 株式会社Pfu | Scanner device |
-
1996
- 1996-10-21 JP JP08298182A patent/JP3090256B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD699343S1 (en) | 2011-12-20 | 2014-02-11 | Alcon Research, Ltd. | Irrigation solution bag |
Also Published As
Publication number | Publication date |
---|---|
JPH10120228A (en) | 1998-05-12 |
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