JPH07261490A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH07261490A JPH07261490A JP6072586A JP7258694A JPH07261490A JP H07261490 A JPH07261490 A JP H07261490A JP 6072586 A JP6072586 A JP 6072586A JP 7258694 A JP7258694 A JP 7258694A JP H07261490 A JPH07261490 A JP H07261490A
- Authority
- JP
- Japan
- Prior art keywords
- main body
- support shaft
- supporting shaft
- frame
- biasing member
- 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.)
- Pending
Links
Landscapes
- Electrophotography Configuration And Component (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、装置本体が上部本体と
下部本体に分かれ、上部本体と下部本体とが開閉可能に
支軸で連結された画像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus in which an apparatus main body is divided into an upper main body and a lower main body, and the upper main body and the lower main body are connected by a support shaft so that they can be opened and closed.
【0002】[0002]
【従来の技術】従来、画像形成装置にはジャム処理、ト
ナー補給、現像部のメンテナンス等の操作を容易にする
ため装置本体を上下に分割し、上部本体を下部本体に対
して開閉可能に支軸で連結されたものがあり、これらの
画像形成装置の上部本体を上方へ開放する際開放動作を
容易にするため、上部本体の重量に打ち勝つ付勢手段が
設けられたものが知られている。2. Description of the Related Art Conventionally, in an image forming apparatus, an apparatus main body is divided into upper and lower parts and an upper main body is openably and closably supported with respect to a lower main body in order to facilitate operations such as jam clearance, toner replenishment, and development section maintenance. Some of them are connected by a shaft, and in order to facilitate the opening operation when opening the upper main body of these image forming apparatuses, it is known that a biasing means for overcoming the weight of the upper main body is provided. .
【0003】図10は従来例の分解斜視図であり、画像
形成手段及び外装カバーを除外してある。上部本体Aの
上フレーム9、下部本体Bの下フレーム15には夫々分
けて内部に画像形成手段が取り付けられており、上下フ
レーム9,15を閉じて画像形成可能となっており、開
いてメンテナンスを行うようになっている。FIG. 10 is an exploded perspective view of a conventional example, in which the image forming means and the exterior cover are omitted. Image forming means is separately installed inside the upper frame 9 of the upper main body A and the lower frame 15 of the lower main body B, and the upper and lower frames 9 and 15 can be closed to form an image, and opened to perform maintenance. Is supposed to do.
【0004】上下フレーム9,15の連結は、下フレー
ム15の一辺両側に設けた角穴のヒンジ取付穴15aに
ヒンジCの取付嵌合部17aが嵌合し、つば17bを挿
通して不図示の取付ねじを下フレーム15にねじ込み、
ヒンジCは下フレーム15に固定される。つば17bに
はつば17bと一体に、上部で離れた支軸支え部17と
付勢部材収納箱19aが設けられ、取付嵌合部17a直
上の付勢部材収納箱19a内には圧縮コイルばねのよう
な付勢部材18、スライダ21が収納され、スライダ2
1上に接するスライダピン21aが付勢部材収納箱19
aの案内溝21に上下動自在に嵌合している。支軸受け
22は上フレーム9に固定され、支軸受け22に固定さ
れたスライダピン押え22aはその下端がスライダピン
21を押える位置にある。ヒンジCは支軸支え部17の
上部を挟み込むように支軸受け22が嵌合し、回転支軸
16が支軸受け22の穴22b、支軸支え部17の穴1
7cを挿通している。To connect the upper and lower frames 9 and 15, the fitting fitting portions 17a of the hinges C are fitted into the hinge fitting holes 15a, which are rectangular holes provided on both sides of one side of the lower frame 15, and the flanges 17b are inserted so as not to be shown. Screw the mounting screw of to the lower frame 15,
The hinge C is fixed to the lower frame 15. The brim 17b is integrally provided with the brim 17b, and is provided with a support shaft supporting portion 17 and an urging member storage box 19a which are separated from each other at an upper portion, and the urging member storage box 19a immediately above the mounting fitting portion 17a is provided with a compression coil spring. The biasing member 18 and the slider 21 as described above are housed in the slider 2
The slider pin 21a which is in contact with the above
It is fitted in the guide groove 21 of a so as to be vertically movable. The support bearing 22 is fixed to the upper frame 9, and the lower end of the slider pin retainer 22a fixed to the support bearing 22 is in a position to retain the slider pin 21. The hinge C is fitted with the support bearings 22 so as to sandwich the upper part of the support shaft support portion 17, and the rotary support shaft 16 has a hole 22b in the support shaft bearing 22 and a hole 1 in the support shaft support portion 17.
7c is inserted.
【0005】上記構成により、ヒンジCの回転支軸16
を中心に回動して上部本体Aは下部本体Bに対して開閉
するものであり、上部本体A開放時付勢部材18はスラ
イダ21、スライダピン21a、スライダピン押え22
a、支軸受け22を介して上部本体Aを上方へ付勢して
支持する。With the above structure, the rotation support shaft 16 of the hinge C is provided.
The upper main body A is opened and closed with respect to the lower main body B by rotating around the center of the upper main body A. When the upper main body A is opened, the biasing member 18 includes the slider 21, the slider pin 21a, and the slider pin retainer 22.
The upper body A is urged upward to be supported via the support bearing 22a.
【0006】[0006]
【発明が解決しようとする課題】上部本体を開放する付
勢部材には、上部本体の重量を回転支軸近くで支えてい
るため、支えるのにてこ比で拡大された力に対抗する十
分な付勢力が必要で図10に示した圧縮コイルばねの他
トーションバーあるいは気体の圧縮力を利用したエアー
ダンパー等が付勢部材として用いられている。Since the urging member for opening the upper body supports the weight of the upper body near the rotation support shaft, it is sufficient to support the force expanded by the leverage. A biasing force is required, and in addition to the compression coil spring shown in FIG. 10, a torsion bar or an air damper utilizing a gas compression force is used as a biasing member.
【0007】そして付勢部材の支持部および上部本体を
支える回転支軸16の支持部分の部材には大きな付勢力
および上部本体の重量を支えるのに十分な強度が必要と
される。The member of the supporting portion of the rotary support shaft 16 that supports the support portion of the biasing member and the upper body is required to have a sufficient biasing force and sufficient strength to support the weight of the upper body.
【0008】さらに上部本体を開閉する際、付勢部材、
その支持部、回転支軸の支持部分には指、電気配線など
をはさむ危険を防止する形状が必要とされる。When opening and closing the upper body, a biasing member,
The supporting portion and the supporting portion of the rotary support shaft are required to have a shape that prevents the risk of pinching a finger, electric wiring or the like.
【0009】従来はその形状的要因あるいは前述の強度
的な面から図10のように下部本体に対して取り付ける
別の部材でヒンジCとして構成されており以下の問題が
あった。 1.付勢手段の支持部分が装置の下部本体と別部材であ
り、この別部材及び下部本体の別部材取付部分が大きな
付勢力に耐える強度が必要で強度的制約から大きな形状
となり、その分の空間スペースが必要となり装置が大き
くなる。 2.上部本体開閉の回転支軸の支持部分(支軸支え部1
7)にも、前記のように大きな付勢力および上部本体の
重量による負荷に耐えるよう十分な強度が要求され、種
々に補強した大きな形状となりその分多大なスペースを
必要とし、装置の小型化を妨げている。 3.付勢部材支持部分および取付部分は、指をはさむ危
険性のない直接手が触れない構成、電気的配線の束線は
さみを防止する構成が要求されこれらの部分を覆う部材
が必要となりその分装置本体とは別部材の付勢部材支持
部分の構成が複雑になると共に装置のコストアップにつ
ながっている。 4.下部本体に対して上部本体が開閉可能な装置の一般
的な構成ではたとえば上部本体側に複写原稿を設置し光
学系、感光ドラムおよび現像装置を備え、又一方下部本
体側には給紙搬送系、転写部および定着部等を備えてい
る。この場合上部本体と下部本体の位置関係がズレてい
ると、たとえば下部本体側で搬送され転写位置に達した
紙に対して、上部本体側で形成される複写画像がズレた
場所に転写され、複写画像の一部が欠けたり、転写紙に
対して斜めになったりする。従って、上部本体と下部本
体の位置合せの精度は複写画質を向上する上で重要な要
素の一つであり、下部本体と上部本体間に支軸支え、支
軸受けが本体と別部材で取り付けて固定しているためこ
れら本体の開閉軸の支持部を構成する各部材およびその
取付には高精度を要求され、部材が多く、組立精度が要
求される分、装置構成上あるいは各部材のコスイトアッ
プにつながっている。Conventionally, because of its shape factor or the above-mentioned strength, the hinge C is constituted by another member attached to the lower body as shown in FIG. 1. The supporting portion of the urging means is a separate member from the lower body of the device, and the separate member and the separate member mounting portion of the lower main body must have a strength to withstand a large urging force, and have a large shape due to the strength constraint, and the space corresponding to that is required. Space is required and the device becomes large. 2. The support part of the rotation support shaft for opening and closing the upper body (support shaft support part 1
Also in 7), sufficient strength is required to withstand the large biasing force and the load due to the weight of the upper main body as described above, and the variously reinforced large shapes require a correspondingly large space, which leads to downsizing of the device. Hindering 3. The urging member supporting portion and the mounting portion are required to have a structure in which there is no risk of pinching a finger and cannot be touched directly by the hand, and a structure for preventing bundled electric wire scissors, and a member for covering these parts is required. This complicates the structure of the biasing member supporting portion, which is a separate member from the main body, and increases the cost of the device. 4. In a general configuration of an apparatus in which the upper main body can be opened and closed with respect to the lower main body, for example, a copy document is set on the upper main body side and an optical system, a photosensitive drum and a developing device are provided, while the lower main body side is provided with a paper feeding and conveying system. , A transfer unit and a fixing unit. In this case, if the positional relationship between the upper main body and the lower main body is misaligned, for example, the copy image formed on the upper main body side is transferred to the misaligned position on the paper conveyed on the lower main body side and reaching the transfer position, Part of the copied image may be missing or may be skewed to the transfer paper. Therefore, the accuracy of the alignment between the upper body and the lower body is one of the important factors for improving the image quality of the copy, and the supporting shaft is supported between the lower body and the upper body, and the supporting shaft bearing is attached as a separate member from the main body. Since they are fixed, high precision is required for each member that constitutes the support portion of the opening / closing shaft of the main body and its mounting, and since many members are required for the assembly precision, the equipment configuration or the cost of each member is increased. Connected to.
【0010】本発明は支軸回り及び付勢部材取付部回り
の構成を簡単でスペースが小さく且つ強度を得易いよう
にすることにより上記課題を解決した支軸結合の上下2
つ割りの画像形成装置を提供することを目的とする。The present invention solves the above problems by providing a simple structure around the support shaft and around the biasing member mounting portion so that the space is small and strength can be easily obtained.
An object of the present invention is to provide an image forming apparatus that is divided into three parts.
【0011】[0011]
【課題を解決するための手段】本発明の第1の発明は画
像形成装置本体が上部本体と下部本体に分かれ、上部本
体は下部本体に対して開閉可能な装置において、上部本
体と下部本体は支軸を中心に開閉可能に連結されている
とともに上部本体と下部本体の間には上部本体の開放時
に上部本体を押し上げる付勢部材と付勢部材を覆う部材
とが配設され、該支軸の支持部分と付勢部材を覆う部材
を下部本体に並設しかつ下部本体と一体に成形したこと
を特徴とする画像形成装置である。According to a first aspect of the present invention, an image forming apparatus main body is divided into an upper main body and a lower main body, and the upper main body can be opened and closed with respect to the lower main body. A biasing member that pushes up the upper main body when the upper main body is opened and a member that covers the biasing member are arranged between the upper main body and the lower main body and are openably and closably connected about the support shaft. In the image forming apparatus, a member for covering the supporting portion and the urging member is provided in parallel with the lower main body and is integrally formed with the lower main body.
【0012】本発明の第2の発明は前記支軸の支持部分
と付勢部材を覆う部材はほぼこれらの全高さにわたり共
通の肉部を有することを特徴とする第1の発明に記載の
画像形成装置である。According to a second aspect of the present invention, the member for covering the supporting portion of the support shaft and the urging member has a common wall portion over substantially the entire height thereof. It is a forming device.
【0013】本発明の第3の発明は前記共通の肉部は付
勢部材を覆う部材の一部をなす共通壁であることを特徴
とする第2の発明に記載の画像形成装置である。A third aspect of the present invention is the image forming apparatus according to the second aspect, wherein the common meat portion is a common wall forming a part of a member for covering the biasing member.
【0014】[0014]
【実施例】以下、本発明の実施例を図面に従って説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【0015】「実施例1」図1、図2は本発明の実施例
1を示し、図1は本発明を実施した画像形成装置の縦断
面図である。同図において、原稿1は原稿台ガラス2上
に置かれ、移動する光源3で照射した原稿1からの反射
光は固定ミラーと移動ミラーを配設したミラー群4と、
ミラー群4中に置かれ設定倍率に原稿画像を拡大、縮小
するレンズ5を通じてドラム状の感光体6上に結像す
る。Embodiment 1 FIGS. 1 and 2 show Embodiment 1 of the present invention, and FIG. 1 is a vertical sectional view of an image forming apparatus embodying the present invention. In FIG. 1, a document 1 is placed on a platen glass 2, and reflected light from the document 1 emitted by a moving light source 3 is reflected by a mirror group 4 having a fixed mirror and a moving mirror.
It is placed in the mirror group 4 and forms an image on the drum-shaped photoconductor 6 through the lens 5 for enlarging and reducing the original image at the set magnification.
【0016】感光体6は図示矢印方向に回転しており、
一次帯電器23により一様帯電を受けて前記原稿画像の
結像は潜像となり、現像器7でこの潜像にトナーが付与
されてトナー像となり、転写位置に到る。転写後の感光
体6上の残トナーはクリーニング器8でもって除去され
る。上述した各部材及びレンズ5、ミラー群4中の移動
ミラー、光源3等を駆動する駆動源のモータ及び動力伝
達部材は上部本体Aの上フレーム9内に取り付けられて
いる。The photoconductor 6 is rotating in the direction of the arrow in the figure,
The original image is formed into a latent image by being uniformly charged by the primary charger 23, and toner is applied to the latent image by the developing device 7 to form a toner image, which reaches the transfer position. The residual toner on the photoconductor 6 after transfer is removed by the cleaning device 8. The above-mentioned members, the lens 5, the movable mirror in the mirror group 4, the motor of the drive source for driving the light source 3, and the power transmission member are mounted in the upper frame 9 of the upper main body A.
【0017】感光体6上のトナー像の形成に応じて、給
紙カセット10中の転写紙は不図示の給紙ローラで一枚
宛給紙され、レジストローラ11で感光体6上のトナー
像とのタイミングをとられて感光体6と転写帯電器12
間に送られ、感光体6上のトナー像が転写紙に転写され
る。転写後、トナー像を支持した転写紙はガイド部材1
3に案内されて定着器14に到り、トナー像は転写紙に
永久固定されて機外に排出される。上記各部材は下部本
体Bのフレーム15に取り付けられている。また、装置
を簡単にするため、感光体6、現像器7、給紙、搬送部
材、定着器14と、これらを駆動する図示されない駆動
源であるメインモータ間の駆動伝達部材及びメインモー
タを上部本体A側に取り付けてある。さらに前述の各装
置に電力を供給する電源のメイン基板もその空間の有効
利用の点から上部本体Aの後部で上フレーム9内に配置
されている。In accordance with the formation of the toner image on the photoconductor 6, the transfer paper in the paper feed cassette 10 is fed to one sheet by a paper feed roller (not shown), and the registration roller 11 forms a toner image on the photoconductor 6. The photoconductor 6 and the transfer charger 12 are timed with
Then, the toner image on the photoconductor 6 is transferred to a transfer sheet. After the transfer, the transfer paper supporting the toner image is the guide member 1.
The toner image is guided to the fixing device 3 and reaches the fixing device 14, and the toner image is permanently fixed to the transfer paper and is discharged to the outside of the machine. The above members are attached to the frame 15 of the lower body B. Further, in order to simplify the apparatus, the photoconductor 6, the developing device 7, the paper feeding / conveying member, the fixing device 14, and a drive transmission member between the main motor, which is a drive source (not shown) for driving these, and the main motor are arranged in the upper part. It is attached to the body A side. Further, a main board of a power source for supplying electric power to each of the above-mentioned devices is also arranged in the upper frame 9 at the rear of the upper main body A from the viewpoint of effective use of the space.
【0018】下部本体Bと上部本体Aは夫々外装部材と
フレームが一体成形、又は一体フレームに外装部材を脱
着可能となっており、何れの場合も下フレーム15と上
フレーム9が回転支軸16で結合されている。この回転
支軸16は下フレーム15に一体的に成形された支軸支
え部17と上フレーム9に固定された単一体の支軸受け
22を結合するものである。In the lower body B and the upper body A, the exterior member and the frame are integrally formed, or the exterior member can be attached to and detached from the integrated frame. In either case, the lower frame 15 and the upper frame 9 are rotatable spindles 16. Are joined by. The rotary support shaft 16 connects a support shaft support portion 17 formed integrally with the lower frame 15 and a single support shaft bearing 22 fixed to the upper frame 9.
【0019】上部本体Aを回転支軸16を中心として押
し上げる付勢部材18は例えば圧縮コイルばねであり、
下フレーム15と一体に成形された収納壁19で囲まれ
ており、収納壁19は図1のA−A拡大断面図の図9に
示すように支軸支え部17と連続し一体である。収納壁
19及び支軸支え部17は共通の肉部を備えるがこの場
合は両者の全高にわたる共通壁19aとしてある。或は
図示されないが収納壁19と支軸支え部17は夫々相対
する壁面を全高にわたって有し、これら壁面を全高にわ
たりリブで結合した一体成形としてもよい。支軸支え部
17及び収納壁19は下フレーム15と一体のモールド
成形品か又は下フレーム15のモールドの際に一体的に
なるように埋込まれるようになっており、付勢部材18
で指、配線等をはさまないようにすると共に、上部本体
Aと下部本体Bの結合と上部本体Aを上方へ付勢する手
段を備えてなるヒンジCの取付空間を小さくし乍ら強度
を大としている。A biasing member 18 for pushing up the upper main body A about the rotary support shaft 16 is, for example, a compression coil spring,
It is surrounded by a storage wall 19 formed integrally with the lower frame 15, and the storage wall 19 is continuous and integral with the support shaft support portion 17 as shown in FIG. 9 of the AA enlarged sectional view of FIG. The storage wall 19 and the support shaft support portion 17 have a common meat portion, but in this case, they are a common wall 19a over the entire height of both. Alternatively, although not shown, the storage wall 19 and the support shaft supporting portion 17 may have wall surfaces facing each other over the entire height, and these wall surfaces may be integrally molded by ribs over the entire height. The support shaft support 17 and the storage wall 19 are either a molded product integrated with the lower frame 15 or embedded so as to be integrated when the lower frame 15 is molded.
To prevent fingers, wiring, etc. from being pinched, and to reduce the mounting space of the hinge C, which is provided with a means for connecting the upper body A and the lower body B and for urging the upper body A upwards, to reduce the strength. It is big.
【0020】収納壁19の側面には縦長の案内溝20が
設けられ、付勢部材18の上部座巻部に接し収納壁19
に上下動自在に収容されたスライダ21上のスライダピ
ン21aが上下動自在に嵌入している。付勢部材18は
収納壁19に連なる底板19bに下端が着座し、上端が
スライダ21に接し、スライダピン21aが支軸受け2
2と一体のスライダピン押え部22aに接することによ
り、支軸受け22を上方へ付勢し、上部本体Aの重量に
抗して上方へ付勢している。尚、図1の状態では図示さ
れない施錠装置(後述)で上フレーム9と下フレーム1
5が係止され、上部本体Aの付勢部材18による上昇を
制止している。A longitudinal guide groove 20 is provided on the side surface of the storage wall 19 and contacts the upper end turn portion of the urging member 18.
A slider pin 21a on a slider 21 that is vertically movably accommodated therein is vertically movably fitted. The lower end of the biasing member 18 is seated on the bottom plate 19b connected to the storage wall 19, the upper end is in contact with the slider 21, and the slider pin 21a is supported by the support bearing 2
By contacting the slider pin pressing portion 22a which is integral with the unit 2, the support shaft bearing 22 is urged upward and against the weight of the upper main body A. In the state shown in FIG. 1, a locking device (not shown) (not shown) is used for the upper frame 9 and the lower frame 1.
5 is locked to prevent the upper body A from being lifted by the biasing member 18.
【0021】図2は後述の施錠装置を解除した図であ
る。上部本体Aは下部本体Bに対して付勢部材18のば
ね力で回転支軸16を中心に回動して開く。この状態で
紙づまりした転写紙を取り除いたり、トナーの補給、感
光体6の交換等のメンテナンスが行われる。FIG. 2 is a view in which a locking device described later is released. The upper body A is rotated with respect to the lower body B by the spring force of the urging member 18, and is rotated about the rotation support shaft 16 to open. In this state, maintenance such as removal of the jammed transfer paper, replenishment of toner, and replacement of the photoconductor 6 is performed.
【0022】図3は、回転支軸16と反対側に設けた上
部本体Aを閉じた際の開きを防止するための施錠装置の
図である。FIG. 3 is a view of a locking device for preventing the upper main body A provided on the opposite side of the rotary support shaft 16 from opening when the upper main body A is closed.
【0023】上部本体A側に設けられて、フック板3
5、軸受板35aに回転自在に支持された軸32に固定
され、軸32を中心に不図示のばねで矢印イ方向に付勢
された回動するフック状のレバー31の一つは上部本体
Aに取付けられたフック板35間に収められている。上
部本体Aが閉じられた時、このレバー31は、下部本体
Bと一体に形成された引掛け形状部34に設けられた角
穴33の上側の辺にフック状の先端が引掛かる構成とな
っている。何れか1つのレバー31全体はベルクランク
状をしており角穴33と引っかかる一端とは異なる他端
を上フレーム9上に突出した解除ボタン(不図示)を押
すことにより、角穴33との係合が解かれる。The hook plate 3 is provided on the upper body A side.
5, one of the rotating hook-shaped levers 31 fixed to the shaft 32 rotatably supported by the bearing plate 35a and urged in the direction of arrow a by a spring (not shown) about the shaft 32 is the upper body. It is housed between the hook plates 35 attached to A. When the upper body A is closed, the lever 31 has a structure in which the hook-shaped tip is hooked on the upper side of the square hole 33 provided in the hook-shaped portion 34 formed integrally with the lower body B. ing. Any one lever 31 has a bell-crank shape as a whole, and the other end different from the one end that is caught by the square hole 33 is pushed by pressing a release button (not shown) protruding above the upper frame 9, The engagement is released.
【0024】ここで付勢部材18の付勢力と上部本体A
の重量との関係は、図2において、上部本体Aの重量を
W、上部本体Aを開いた時の付勢部材18の付勢力を
P、上部本体Aを閉じた時の同付勢力P′、上部本体A
を開いたときの重心をG、回転支軸16から重心Gまで
の水平距離をL、上部本体Aを閉じた時の重心をG′、
回転支軸16から重心G′までの水平距離をL′、上部
本体Aを閉じはじめる際の上フレーム9の開き側上角を
着力点として垂直下方へ向って加える押し力をF、回転
支軸16から押し力Fの着力点までの水平距離をE、上
部本体Aを閉じ終る時の押し力をF′、回転支軸16か
ら押し力F′の着力点までの水平距離をE′、さらに回
転支軸16から付勢部材18中心までの水平距離をHと
すると、 上部本体Aが開いた状態では、 W・L+F・E=P・H・・・・・・ 上部本体が閉じた状態では W・L′+F′・E′=P′・H・・・・ また付勢部材のばね定数をK、上部本体が開いたときと
閉じたときの付勢部材18の長さの差をδとすると P′−P=K・δ・・・・・・・ 等の関係式が得られる。Here, the urging force of the urging member 18 and the upper body A
2, the weight of the upper body A is W, the urging force of the urging member 18 when the upper body A is opened is P, and the urging force P ′ when the upper body A is closed is P ′ in FIG. , Upper body A
G is the center of gravity when the is opened, L is the horizontal distance from the rotary support shaft 16 to the center of gravity G, and G ′ is the center of gravity when the upper body A is closed.
The horizontal distance from the rotary support shaft 16 to the center of gravity G'is L ', and the pushing force applied vertically downward with the upper side angle of the upper frame 9 at the time of starting to close the upper body A as a force application point being F, the rotary support shaft. The horizontal distance from 16 to the force applying point of the pushing force F is E, the pushing force when closing the upper body A is F ′, the horizontal distance from the rotary support shaft 16 to the applying point of the pushing force F ′ is E ′, and Assuming that the horizontal distance from the rotary support shaft 16 to the center of the biasing member 18 is H, when the upper body A is open, W · L + FE · P = H ····· When the upper body is closed, W · L ′ + F ′ · E ′ = P ′ · H ... Also, the spring constant of the biasing member is K, and the difference between the lengths of the biasing member 18 when the upper body is opened and when it is closed is δ. Then, a relational expression such as P′−P = K · δ ···· is obtained.
【0025】装置本体が上部本体Aと下部本体Bに分か
れ、上部本体Aが下部本体Bに対して開閉可能な形式の
画像形成装置は一般的に比較的小形の装置に多く用いら
れており、ここでは本発明を最大サイズ日本工業規格紙
の大きさA4の原稿が複写可能な複写機に実施した場合
について説明する。An image forming apparatus in which the main body of the apparatus is divided into an upper main body A and a lower main body B, and the upper main body A can be opened and closed with respect to the lower main body B is generally used in a relatively small apparatus. Here, a case will be described in which the present invention is applied to a copying machine capable of copying a document of maximum size Japanese Industrial Standard Paper size A4.
【0026】最大原稿がA4サイズ(210mm×29
7mm)で横長に原稿を置く装置本体サイズは夫々mm
で幅430、奥行438、高さ280で前述の画像形成
に係る諸装置を配置収納する。The maximum original is A4 size (210 mm × 29
7 mm), the size of the main body of the device for placing the document horizontally is mm
With the width 430, the depth 438, and the height 280, the above-described various devices related to image formation are arranged and housed.
【0027】上部本体Aの重量Wは、原稿台ガラス1
0.3N、レンズミラー群10.2N、光学駆動装置
(モーターを含む)3.9N、原稿圧着板7.1N、電
源部(操作表示部を含む)14.5N、上部本体Aの外
装カバー(上部フレーム9に付着)15N 、メインモ
ーター駆動装置10N、感光体6、現像器7、クリーニ
ング器8.3N、上フレーム9等構造体47.4N の
合計でW=126.7Nとなる。The weight W of the upper main body A is equal to that of the platen glass 1
0.3N, lens mirror group 10.2N, optical driving device (including motor) 3.9N, original pressure plate 7.1N, power supply unit (including operation display unit) 14.5N, upper body A outer cover ( 15N on the upper frame 9, the main motor driving device 10N, the photoconductor 6, the developing device 7, the cleaning device 8.3N, and the structure 47.4N on the upper frame 9 and the like, W = 126.7N.
【0028】回転支軸16は図4からもわかるように、
図の上部本体Aの右端から回転支軸16までの距離を大
きくすると上部本体Aが回転すると回転支軸16から外
側の部分が本体の内部にはいり込んでくる空間が大きく
なるため部品配置の制約のあるデットスペース化し、本
体空間の有効利用を考えると本体の端部が良いので装置
本体の右端から13mmの場所にする。また付勢部材1
8も本体空間スペースの有効利用の点から回転支軸16
の支え部の支軸支え部17の近傍が良く回転支軸16か
らH=47mm装置内部にはいった位置に設置する。As can be seen from FIG. 4, the rotary support shaft 16 has
If the distance from the right end of the upper main body A to the rotary support shaft 16 is increased, the space outside the rotary support shaft 16 into the main body becomes larger when the upper main body A rotates. Considering the effective use of the main body space with a certain dead space, the end of the main body is good, so it should be 13 mm from the right end of the main body of the apparatus. Also, the biasing member 1
8 is also a rotary support shaft 16 from the viewpoint of effective use of the body space
The supporting part of the supporting part is close to the supporting shaft supporting part 17 and is installed at a position where H = 47 mm from the rotary supporting shaft 16 inside the apparatus.
【0029】上部本体Aの開き角を35°に設定し、上
部本体Aが35°開いたときの上部本体Aの重心Gは回
転支軸16からL=166mmの位置にある。よって、
上部本体Aが35°開いたとき上部本体Aが開いている
ためには上部本体Aの重量126.7Nを支える付勢部
材18の力は、式において上部本体Aの左端の押し力
Fを0Nとした時の力以上でなければならない。上記数
値を式に代入すると 126.7×166+0×(430−13)=P×47 よって付勢力P=447.5N以上必要である。The center of gravity G of the upper body A when the opening angle of the upper body A is set to 35 ° and the upper body A is opened by 35 ° is L = 166 mm from the rotary support shaft 16. Therefore,
Since the upper body A is opened when the upper body A is opened by 35 °, the force of the biasing member 18 that supports the weight 126.7 N of the upper body A is 0 N in the formula. It must be greater than or equal to the force at the time. Substituting the above numerical values into the formula, 126.7 × 166 + 0 × (430−13) = P × 47 Therefore, the biasing force P = 447.5N or more is required.
【0030】ここで付勢部材18を例えば圧縮コイルば
ねとすると装置スペース及び前述の荷重条件等を考える
と線径φ2.9mm、コイル径φ18mm、自由長17
2mmの材質SWPBのコイルばねを51mm圧縮して
上部本体Aが開いた状態の初期荷重として使用し、既知
のコイルばね計算式からばね定数は4.405N/mm
となり、図2の上部本体Aを開いた状態ではばね力は2
24.6Nでこのばねを装置本体の前後に配置すると2
24.6N×2=449.2>Pとなる。If the biasing member 18 is, for example, a compression coil spring, the wire diameter φ2.9 mm, the coil diameter φ18 mm, and the free length 17 are taken into consideration when considering the apparatus space and the above-mentioned load conditions.
A coil spring of 2 mm material SWPB was compressed by 51 mm and used as an initial load with the upper body A opened, and the spring constant was 4.405 N / mm from a known coil spring calculation formula.
And the spring force is 2 when the upper body A in FIG. 2 is opened.
When this spring is placed at the front and rear of the device body at 24.6N, 2
24.6N × 2 = 449.2> P.
【0031】上部本体Aが閉じた時のこの圧縮コイルば
ねのばね力は、上部本体Aが閉じることによってばね長
さが、121mmから91mmになりばねδ=30mm
+初期荷重のため圧縮量51mm=81mm縮んだこと
になるのでばね1本当り81mm×4.405N/mm
=356.8Nとなる。The spring force of this compression coil spring when the upper body A is closed is that the spring length is changed from 121 mm to 91 mm by closing the upper body A, and the spring δ = 30 mm.
+ Because of the initial load, the amount of compression is 51 mm = 81 mm, so 81 mm x 4.405 N / mm per spring
= 356.8N.
【0032】このばねは2本使用しているので356.
8N×2=713.6Nの極めて大きな付勢力が加わっ
ていることになる。Since two springs are used, 356.
This means that an extremely large biasing force of 8N × 2 = 713.6N is applied.
【0033】下部本体Bに対する上部本体Aの位置決め
は装置本体の横方向(左右方向)と高さ方向(上下方
向)は前述の2ケ所の回転支軸16の部分を支えている
下部本体B側の支軸支え部17と上部本体A側の支軸受
け22とで決められ、奥行方向(前後方向)についても
2ケ所有るうちの1ケ所の支軸支え部17の部分の前側
壁面と後側壁面(装置本体の奥行方向に対して垂直な壁
面)に支軸受け22部の前後の壁の内側壁面が当接する
ことによって決まっている。The positioning of the upper main body A with respect to the lower main body B is carried out in the lateral direction (left-right direction) and the height direction (vertical direction) of the apparatus main body by the side of the lower main body B which supports the above-mentioned two rotary support shafts 16 portions. Is determined by the support shaft support portion 17 and the support shaft bearing 22 on the upper body A side, and the front side wall surface and the rear side of the support shaft support portion 17 in one of the two in the depth direction (front-back direction) It is determined by the inner wall surfaces of the front and rear walls of the support shaft bearing 22 coming into contact with the wall surface (the wall surface perpendicular to the depth direction of the apparatus body).
【0034】さらに奥行方向の位置決めは図3に図示し
ているように、下部本体B側の引掛け形状部34の厚さ
t寸法部分が、上部本体A側に設けているフック板35
のT寸法部分にはいり込むことによって規制されてい
る。この位置決めによって物流上のたとえば落下等の衝
撃の際加わる下部本体Bに対する上部本体Aのずれの力
を受けて回転支軸16部分の破損、上部本体Aを閉じた
ときの上、下本体A,Bの位置ズレとゆがみ等を防いで
いる。Further, for the positioning in the depth direction, as shown in FIG. 3, the thickness t dimension portion of the hook-shaped portion 34 on the lower main body B side is provided on the hook plate 35 provided on the upper main body A side.
It is regulated by slipping into the T dimension part of the. Due to this positioning, the rotating main shaft 16 is damaged due to the displacement force of the upper main body A with respect to the lower main body B applied at the time of physical shock such as dropping, and the upper and lower main bodies A, when the upper main body A is closed, It prevents the misalignment and distortion of B.
【0035】ここでT寸法はt寸法に対して、引掛け形
状部34と支軸支え部17の前側及び後側壁面(支軸受
け22壁面との当接部分)との相対位置誤差、及び支軸
受け22の壁面(支軸支え部17と当接している部分)
とフック板35との位置誤差の合計誤差分を吸収するた
めすきまT−t=Δdを設けてこれらがずれることによ
って生じる上部本体A、下部本体B等へのゆがみを最少
限に止めている。このすきまΔdは実際0.3mm程度
で両サイドに等しく振り分けている。この角度の位置ズ
レは、下部本体Bに対する上部本体Aのズレの角度にす
るとΔd/2÷(回転支軸16から軸32までの距離4
00mm)=0.15/400radで転写紙搬送上の
問題である転写紙斜行による画像の傾き等に対して許容
できるレベルである。Here, the T dimension is relative to the t dimension, and the relative position error between the hook-shaped portion 34 and the front and rear side wall surfaces of the support shaft supporting portion 17 (contact portions with the wall surface of the support bearing 22) and the support. Wall surface of bearing 22 (a portion in contact with support shaft support portion 17)
In order to absorb the total positional error between the hook plate 35 and the hook plate 35, a clearance T−t = Δd is provided, and the distortion to the upper main body A, the lower main body B, etc. caused by the deviation of these is minimized. This clearance Δd is actually about 0.3 mm and is equally distributed to both sides. The positional deviation of this angle is Δd / 2 ÷ (the distance from the rotation support shaft 16 to the shaft 32 is 4 when the upper body A is displaced from the lower body B).
(00 mm) = 0.15 / 400 rad, which is an acceptable level for image skew due to skew of the transfer sheet, which is a problem in transfer sheet transportation.
【0036】本実施例1の支軸支え部17は下部本体B
の端部に位置し且つ、下部本体Bの下フレーム15と一
体成形となっているため側面方向からの肉抜きが可能で
ある。そして上部本体Aを支えるための支軸支え部17
とそれとほぼ全高にわたり一体に連設して付勢部材収納
壁19を下部本体Bの下フレーム15と一体で成形する
ことによって、別体構成の場合と比べて部品点数を減ら
しコストの低減と取付部分の空間が省略でき、さらに下
フレーム15とこれら部分の相互でこの部分に加わる大
きな負荷(上部本体Aの重量と上部本体Aを押し上げる
付勢力)を受けているため別体構成と比べて小さな形状
でこれら大きな負荷に耐えるような十分な強度も得るこ
とができる。The support shaft supporting portion 17 of the first embodiment is a lower body B.
Since it is located at the end portion of and is integrally formed with the lower frame 15 of the lower body B, it is possible to lighten the side surface. And a support shaft support portion 17 for supporting the upper body A
By forming the urging member storage wall 19 integrally with the lower frame 15 of the lower main body B by being integrally provided over substantially the entire height thereof, the number of parts can be reduced and the cost can be reduced and mounted as compared with the case of the separate structure. The space of a part can be omitted, and since a large load (weight of the upper main body A and biasing force that pushes up the upper main body A) applied to this part between the lower frame 15 and these parts is received, it is smaller than a separate structure. The shape also provides sufficient strength to withstand these high loads.
【0037】付勢部材収納壁19が下フレーム15と一
体で成形されているので付勢部材18の作動時に、手指
等触れたりはさんだりすることを防止するカバー、上部
本体Aと下部本体B間で接続されている電気配線がはさ
まれるのを防止するカバーを別に付加する必要がなくそ
の分構成を簡単にすることができ装置のコストダウンに
つながる。Since the urging member storage wall 19 is formed integrally with the lower frame 15, a cover for preventing fingers or the like from being touched or pinched when the urging member 18 is operated, an upper main body A and a lower main body B. There is no need to add a cover for preventing the electrical wiring connected between them from being pinched, and the structure can be simplified accordingly, leading to cost reduction of the device.
【0038】上部本体Aとの位置決め部についても下部
本体Bと一体に成形された支軸支え部17の壁面を使用
しているため別体構成と比べて部品取付誤差を考える必
要がなく、また強度的にも前述のように改善が見込める
ため、特に上部本体Aを閉じた時に生ずる付勢力増大に
伴うこの部分の変形に対して効果かが有り、下部本体B
と上部本体Aの位置決め精度が向上する。Since the wall surface of the support shaft support 17 formed integrally with the lower body B is used for the positioning portion with respect to the upper body A, it is not necessary to consider a component mounting error as compared with a separate structure. In terms of strength, since improvement can be expected as described above, there is an effect on the deformation of this portion due to the increase in biasing force generated when the upper body A is closed.
And the positioning accuracy of the upper body A is improved.
【0039】従って、上部本体Aと下部本体Bが位置ズ
レを生じることによって発生する複写画像の劣化、たと
えば上下の位置がずれると、転写紙を安定して搬送する
レジストローラ11対の圧バランスが狂ったり、上部本
体Aと下部本体Bとで形成される搬送ガイドの間隔が狂
ったりして生じる斜行、ジャム等の転写紙搬送不良現象
とか或は上部本体Aが下部本体Bに対して斜めに位置が
ズレると生ずる搬送された転写紙位置に複写画像がズレ
る現象とか、複写画像の一部が欠けたり、転写紙に対し
て斜めになったりする現象等の発生を防ぐことができ
る。Accordingly, when the upper main body A and the lower main body B are misaligned and the copy image is deteriorated, for example, when the upper and lower positions are displaced, the pressure balance between the pair of registration rollers 11 that stably conveys the transfer paper is improved. The transfer paper formed by the upper main body A and the lower main body B is misaligned, or the transfer paper is not conveyed properly such as a skew or a jam, or the upper main body A is slanted with respect to the lower main body B. It is possible to prevent a phenomenon in which the copy image is displaced to the position of the conveyed transfer paper, a phenomenon in which a part of the copy image is missing, or a case where the copy image is oblique to the transfer paper.
【0040】又、前述の理由により上部本体Aと下部本
体Bの位置決めを支軸支え部17の部分の他にフック部
分(31〜35)を位置決めに設けた場合に上部本体A
の位置は下部本体Bに対してその奥行方向(前後方向)
に2ケ所有る回転支軸16とでも位置が決まっているた
め、この奥行方向に2ケ所有る回転支軸16の位置がず
れるとその分は上部本体Aもしくは下部本体Bにひずみ
を与え、ミラー群4の動き、画像の結像、転写紙の搬
送、定着等に影響が生じて発生する種々の複写画像のゆ
がみに対しても支軸支え部17が強度アップし、前記の
負荷による変形を小さくすることは大きな効果がある。For the above-described reason, when the upper body A and the lower body B are positioned by the hook portions (31 to 35) in addition to the support shaft supporting portion 17, the upper body A is positioned.
Is in the depth direction (front-back direction) with respect to the lower body B.
Since the position of the rotary support shaft 16 which is owned by two is fixed, when the position of the rotary support shaft 16 which is owned by two in the depth direction is deviated, the corresponding amount distorts the upper body A or the lower body B, The support shaft supporting portion 17 is strengthened against various distortions of the copied image caused by the movement of the mirror group 4, the image formation, the conveyance of the transfer paper, the fixing, etc., and the deformation due to the load. It is very effective to reduce.
【0041】「実施例2」図5は本発明を使用した実施
例2の縦断面図で付勢部材を上部本体側に取付けた例で
ある。同図において付勢部材50は上部本体Aに対して
回転支軸16の横方向の傍に設けた回転軸51を中心に
回転可能なアーム52と、アーム52に対して揺動可能
な支え板53との間に設置されている。アーム52は先
端が上方に在り、上部ばね座部52aとなっており、支
え板53の下端は下部ばね座部53bをなし、ばね座部
52a,53b間に付勢部材50を縮設してある。下部
ばね座部53bに固定された心棒53aは上部ばね座部
52aの穴を挿通し、上部ばね座部52a上で心棒53
端にナット53cがねじ込まれている。付勢部材50を
上部本体A側へ偏らせることにより下部本体B側の付勢
部材収納空間を形成する収納壁55を底上げして小さく
して、下部本体Bの部品配置を有利にする効果がある。[Embodiment 2] FIG. 5 is a longitudinal sectional view of Embodiment 2 using the present invention, showing an example in which a biasing member is attached to the upper body side. In the figure, the urging member 50 includes an arm 52 rotatable about a rotation shaft 51 provided laterally of the rotation support shaft 16 with respect to the upper body A, and a support plate swingable with respect to the arm 52. It is installed between 53. The tip of the arm 52 is located upward and serves as an upper spring seat 52a, the lower end of the support plate 53 forms a lower spring seat 53b, and the biasing member 50 is contracted between the spring seats 52a and 53b. is there. The mandrel 53a fixed to the lower spring seat portion 53b is inserted through the hole of the upper spring seat portion 52a, and the mandrel 53 is mounted on the upper spring seat portion 52a.
A nut 53c is screwed into the end. By biasing the biasing member 50 toward the upper main body A side, the storage wall 55 that forms the biasing member storage space on the lower main body B side is raised to the bottom to make it smaller, which has the effect of favoring the component arrangement of the lower main body B. is there.
【0042】「実施例3」図6は前述の実施例1にて説
明した下部本体Bの下フレーム15を斜めから見た図で
上部本体Aの回転支軸16の支軸支え部17と付勢部材
18の収納壁19部分とに外装カバー取付部分を持つ壁
面60と61をそれぞれ連接して設けた例で、前述の実
施例1の上部本体Aの回転支軸16の支軸支え部17の
強度が向上し、それによって、上部本体Aを閉じた時の
上部本体Aと下部本体Bの位置ズレを小さくし、従来例
の種々の欠点をさらに少なくする効果がある。[Third Embodiment] FIG. 6 is a perspective view of the lower frame 15 of the lower body B described in the first embodiment and is shown with the support shaft support portion 17 of the rotary support shaft 16 of the upper body A. In the example in which the wall portion 60 of the biasing member 18 and the wall surfaces 60 and 61 having the exterior cover mounting portion are connected to each other, the support shaft support portion 17 of the rotary support shaft 16 of the upper main body A of the first embodiment described above is provided. Has the effect of reducing the positional deviation between the upper main body A and the lower main body B when the upper main body A is closed, and further reducing various drawbacks of the conventional example.
【0043】「実施例4」図7は前述の付勢部材の収納
壁を付勢部材の位置決めあるいは案内面とした例の図で
ある。付勢部材はたとえば圧縮コイルばねとすると、上
部本体Aを開いた時大きな付勢力を得かつ上部本体Aを
閉じた時極力小さな付勢力を得るためには、ばねを小さ
くし、またばね収納スペースを小さくするようなばねを
考えるときには本実施例4のように圧縮コイルばね75
の内側にさらにもう一つの圧縮コイルばね76を配置す
ることが有利である。この時内側の圧縮コイルばね76
はスライダ73に設けられたガイド部74と下部本体B
上に形成された突出部71とに位置決めして取り付けら
れ、外側の圧縮コイルばね75は下部本体Bの支軸支え
部70の部分に設けられた案内面72とスライダ73に
設けられた凹部77とに挿入されている。また支軸支え
部70には圧縮コイルばね75の案内面72の直径より
も大径のスライダ73を案内する案内面78も設けられ
前述の案内面72とは斜面79にてつながっている。[Fourth Embodiment] FIG. 7 is a diagram showing an example in which the storage wall of the biasing member is used as a positioning or guiding surface for the biasing member. If the urging member is, for example, a compression coil spring, in order to obtain a large urging force when the upper body A is opened and a very small urging force when the upper body A is closed, the spring should be small and the spring storage space should be small. When considering a spring that makes the compression coil smaller, as in the fourth embodiment, the compression coil spring 75
It is advantageous to place a further compression coil spring 76 inside the. At this time, the inner compression coil spring 76
Is a guide portion 74 provided on the slider 73 and the lower body B.
The compression coil spring 75 on the outer side, which is positioned and attached to the protruding portion 71 formed above, is provided with a guide surface 72 provided on the support shaft supporting portion 70 of the lower main body B and a recess 77 provided on the slider 73. And has been inserted into. A guide surface 78 for guiding the slider 73 having a diameter larger than that of the guide surface 72 of the compression coil spring 75 is also provided on the support shaft supporting portion 70, and is connected to the guide surface 72 by an inclined surface 79.
【0044】このように上部本体Aを押し上げる付勢部
材である圧縮コイルばねの収納スペースを小さくした複
数の圧縮コイルばね75,76を使用する場合では、ば
ねのコイル径に対してばねの自由長が増しばねが座屈し
やすく下部本体Bの支軸支え部70に連設して前述の案
内面72等を設けることは伸縮する圧縮コイルばね7
5,73、摺動するスライダ73の動きをなめらかに
し、摺擦音を減らす有効な対策である。In the case of using a plurality of compression coil springs 75 and 76 in which the storage space for the compression coil springs, which is the biasing member for pushing up the upper main body A, is reduced, the free length of the spring is set relative to the coil diameter of the spring. The provision of the above-mentioned guide surface 72 and the like connected to the support shaft supporting portion 70 of the lower main body B causes the compression coil spring 7 to expand and contract.
This is an effective measure to reduce the sliding noise by smoothing the movement of the sliding slider 73.
【0045】「実施例5」図8は付勢部収納スペースを
装置本体の奥行方向(前後)で変えた場合の図である。[Embodiment 5] FIG. 8 is a diagram showing a case where the urging portion storage space is changed in the depth direction (front and rear) of the apparatus body.
【0046】上部本体A側に電源基板、機械の駆動源、
駆動ギア列等が配置される場合これらは装置全体のレイ
アウトを考えた場合、装置の奥側(後面側)に配置した
方がスペース上有利である。この場合上部本体Aの重心
は奥側(後面側)にずれ、上部本体Aをバランス良く押
し上げるには装置の奥側の付勢部材の付勢力を前側(前
面側)に対して強くする必要がある。従って既知の付勢
部材(たとえば圧縮コイルばね)の特性を考えると付勢
部材収納スペースも奥側の方を長く確保する必要がある
ので本例ではたとえば転写紙を積載する給紙カセット1
0の奥側のスペース(高さS)を利用して、奥側の付勢
部材81の収納スペースをQ→Rへ長く設定し装置の空
間を有効利用することができる。また奥側の付勢部材8
1の収納部底面(ばね座)80は下部本体Bの一部で
も、あるいは給紙カセット10の受け面であるカセット
台板金82を利用しても良い。このように、大きな荷重
を受ける奥側の付勢部材81の収納スペースを増すこと
ことは付勢部材18の設計の自由度が増え、設計上有利
である効果がある。On the upper body A side, a power board, a drive source for the machine,
When the drive gear train and the like are arranged, it is advantageous in terms of space to arrange them on the back side (rear surface side) of the device when considering the layout of the entire device. In this case, the center of gravity of the upper main body A shifts to the back side (rear surface side), and in order to push up the upper main body A in a well-balanced manner, it is necessary to make the biasing force of the biasing member on the back side of the apparatus stronger than the front side (front side). is there. Therefore, considering the characteristics of a known biasing member (for example, a compression coil spring), it is necessary to secure a longer biasing member storage space on the back side, so in this example, for example, the paper feed cassette 1 for stacking transfer paper.
By using the space (height S) on the back side of 0, the storage space of the biasing member 81 on the back side can be set long from Q to R to effectively use the space of the apparatus. In addition, the biasing member 8 on the back side
The bottom surface (spring seat) 80 of the storage unit 1 may be a part of the lower main body B, or a cassette base metal plate 82 that is a receiving surface of the paper feed cassette 10 may be used. As described above, increasing the storage space of the biasing member 81 on the back side that receives a large load increases the degree of freedom in designing the biasing member 18, and is advantageous in design.
【0047】[0047]
【発明の効果】以上説明したように、本発明の第1の発
明は下部本体の端部に、上部本体の開閉時の回転軸の支
持部分と、上部本体を下部本体に対して押し上げる力を
有する付勢部材を覆う部材とを下部本体と一体で成形し
たことにより、 1.これら部分の構成が簡略化され部品点数減等による
製造コストの低下が可能となる 2.一体化することで部品相互間の取付部分が不要でそ
の分スペースが小さくて済み、装置の大きさを小型化で
きる。 3.大きな負荷のかかる上部本体支持部分の形状を強度
を低下させずにコンパクトに形成することができる。 4.下部本体と上部本体との相対位置精度の向上、転写
材の搬送性、複写画質を向上させることができる。 等の効果がある。As described above, according to the first aspect of the present invention, the end portion of the lower body is provided with a support portion for the rotating shaft when the upper body is opened and closed, and a force for pushing the upper body up against the lower body. By forming the member for covering the biasing member that is integrally formed with the lower body, The structure of these parts is simplified and the manufacturing cost can be reduced by reducing the number of parts. Since they are integrated, the parts to be mounted are not required, and the space is reduced accordingly, and the size of the device can be reduced. 3. The shape of the upper main body supporting portion to which a large load is applied can be made compact without lowering the strength. 4. It is possible to improve the relative positional accuracy between the lower main body and the upper main body, the transportability of the transfer material, and the copy image quality. And so on.
【0048】本発明の第2の発明は第1の発明におい
て、支軸の支持部分と付勢部材を覆う部分をほぼこれら
の全高にわたり共通の肉部を有することとしたので、支
軸回り及び付勢部材の力を受ける部分がきわめて強固と
なるので支軸と付勢部材間の距離を小さくし乍ら強度、
剛性を充分保つことができる。According to a second aspect of the present invention, in the first aspect, the supporting portion of the support shaft and the portion covering the biasing member have a common wall portion over substantially the entire height thereof. Since the portion that receives the force of the biasing member becomes extremely strong, the distance between the support shaft and the biasing member can be reduced and the strength,
Sufficient rigidity can be maintained.
【0049】本発明の第3の発明は第2の発明において
共通の肉部を共通壁としたので特に下部本体に於ける支
軸を支える部分が強化される効果が大である。In the third invention of the present invention, since the common wall portion is the common wall in the second invention, the effect of strengthening the portion of the lower body supporting the support shaft is particularly great.
【図1】本発明の実施例1の画像形成装置の縦断面図で
ある。FIG. 1 is a vertical cross-sectional view of an image forming apparatus according to a first embodiment of the present invention.
【図2】図1で上部本体が開いた状態の縦断面図であ
る。FIG. 2 is a vertical cross-sectional view showing a state where an upper body is opened in FIG.
【図3】図1の上部本体が開いた状態の斜視図である。FIG. 3 is a perspective view of the upper main body of FIG. 1 in an open state.
【図4】上部本体の回転支軸が内側に位置している装置
の縦断面図である。FIG. 4 is a vertical cross-sectional view of the device in which the rotation support shaft of the upper body is located inside.
【図5】本発明の実施例2の縦断面図である。FIG. 5 is a vertical sectional view of a second embodiment of the present invention.
【図6】本発明の実施例3の斜視図である。FIG. 6 is a perspective view of a third embodiment of the present invention.
【図7】本発明の実施例4の縦断面図である。FIG. 7 is a vertical cross-sectional view of Embodiment 4 of the present invention.
【図8】本発明の実施例5の縦断面図である。FIG. 8 is a vertical sectional view of a fifth embodiment of the present invention.
【図9】図1のA−A拡大断面図である。9 is an enlarged cross-sectional view taken along the line AA of FIG.
【図10】従来例の分解斜視図である。FIG. 10 is an exploded perspective view of a conventional example.
9 上部本体のフレーム 15 下部本体のフレーム 16 回転支軸 17 支軸支え部 18 上部本体押し上げの付勢部材 19 収納壁 20 案内溝 21 スライダ 22 支軸受け 9 Frame of upper main body 15 Frame of lower main body 16 Rotating support shaft 17 Support shaft supporting portion 18 Energizing member for pushing up the upper main body 19 Storage wall 20 Guide groove 21 Slider 22 Support bearing
Claims (3)
に分かれ、上部本体は下部本体に対して開閉可能な装置
において、上部本体と下部本体は支軸を中心に開閉可能
に連結されているとともに上部本体と下部本体の間には
上部本体の開放時に上部本体を押し上げる付勢部材と付
勢部材を覆う部材とが配設され、該支軸の支持部分と付
勢部材を覆う部材を下部本体に並設しかつ下部本体と一
体に成形したことを特徴とする画像形成装置。1. A device in which an image forming apparatus main body is divided into an upper main body and a lower main body, and the upper main body can be opened and closed with respect to the lower main body, and the upper main body and the lower main body are connected to be openable and closable around a support shaft. A biasing member that pushes up the upper body when the upper body is opened and a member that covers the biasing member are disposed between the upper body and the lower body. An image forming apparatus, which is provided in parallel with a main body and is integrally formed with a lower main body.
材はほぼこれらの全高さにわたり共通の肉部を有するこ
とを特徴とする請求項1に記載の画像形成装置。2. The image forming apparatus according to claim 1, wherein a member that covers the supporting portion of the support shaft and the urging member has a common wall portion over substantially the entire height thereof.
一部をなす共通壁であることを特徴とする請求項2に記
載の画像形成装置。3. The image forming apparatus according to claim 2, wherein the common meat portion is a common wall that forms a part of a member that covers the biasing member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6072586A JPH07261490A (en) | 1994-03-16 | 1994-03-16 | Image forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6072586A JPH07261490A (en) | 1994-03-16 | 1994-03-16 | Image forming device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07261490A true JPH07261490A (en) | 1995-10-13 |
Family
ID=13493643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6072586A Pending JPH07261490A (en) | 1994-03-16 | 1994-03-16 | Image forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07261490A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7421228B2 (en) * | 2004-10-29 | 2008-09-02 | Canon Kabushiki Kaisha | Image forming apparatus having upper and lower bodies |
CN101995798A (en) * | 2009-08-19 | 2011-03-30 | 京瓷美达株式会社 | Image forming apparatus |
US8081899B2 (en) | 2006-12-19 | 2011-12-20 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having contacting members for contacting each other responsive to an external force when an opening/closing member is in closed position |
JP2014115573A (en) * | 2012-12-12 | 2014-06-26 | Brother Ind Ltd | Image forming apparatus |
-
1994
- 1994-03-16 JP JP6072586A patent/JPH07261490A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7421228B2 (en) * | 2004-10-29 | 2008-09-02 | Canon Kabushiki Kaisha | Image forming apparatus having upper and lower bodies |
US8081899B2 (en) | 2006-12-19 | 2011-12-20 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having contacting members for contacting each other responsive to an external force when an opening/closing member is in closed position |
CN101995798A (en) * | 2009-08-19 | 2011-03-30 | 京瓷美达株式会社 | Image forming apparatus |
JP2014115573A (en) * | 2012-12-12 | 2014-06-26 | Brother Ind Ltd | Image forming apparatus |
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