JPH01142626A - Illuminator for image forming device - Google Patents

Illuminator for image forming device

Info

Publication number
JPH01142626A
JPH01142626A JP30186587A JP30186587A JPH01142626A JP H01142626 A JPH01142626 A JP H01142626A JP 30186587 A JP30186587 A JP 30186587A JP 30186587 A JP30186587 A JP 30186587A JP H01142626 A JPH01142626 A JP H01142626A
Authority
JP
Japan
Prior art keywords
lamp
image forming
shape
holding member
memory alloy
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
Application number
JP30186587A
Other languages
Japanese (ja)
Inventor
Eiji Nakajima
栄次 中嶋
Kenzo Okubo
憲造 大久保
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Priority to JP30186587A priority Critical patent/JPH01142626A/en
Publication of JPH01142626A publication Critical patent/JPH01142626A/en
Pending legal-status Critical Current

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  • Light Sources And Details Of Projection-Printing Devices (AREA)

Abstract

PURPOSE:To prevent the vibration of a lamp and to prevent image nonuniformity by permitting a holding part material made of shape memory alloy which is heated by lamp heat to be deformed to the memory shape so that the middle part of the lamp is held when the lamp is lighted. CONSTITUTION:The lamp 21 composed of a long halogen lamp and paraboloid on which the lamp 21 is placed at the virtual focus are formed and a reflection mirror 22 whose inner surface is made of mirror finished aluminum plate is provided. And the holding part material 5 made of bidirectional memory alloy which stores the shape that wraps around the lamp 21 when heated and the shape that releases the wrapping when cooled is installed on the reflection mirror 22. Thus the vibration of the lamp 21 is prevented as the holding part material 1 is deformed so as to hold the middle part of the lamp 21 and service life of the lamp is prolonged and the image nonuniformity is prevented.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 この発明は、アナログ式複写機の光学部や、デジタル式
複写機およびファクシミリの原稿読取部に用いられる画
像形成装置の照明装置に関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an illumination device of an image forming apparatus used in an optical section of an analog copying machine, a digital copying machine, and a document reading section of a facsimile.

〈従来の技術と発明が解決しようとする問題点〉従来、
例えば上記アナログ式複写機は、透明なコンタクトガラ
ス上に載置した原稿を、照明装置により照明し、コンタ
クトガラスの下面に沿ってスリットを移動させて原稿面
を走査しくスリット露光方式)、原稿からの反射光を、
反射鏡およびレンズ等により感光体表面に導いて、原稿
像に対応した画像を形成させるようにしている。
<Problems to be solved by conventional technology and invention> Conventionally,
For example, in the analog copying machine described above, an original placed on a transparent contact glass is illuminated by an illumination device, and a slit is moved along the bottom surface of the contact glass to scan the original surface (slit exposure method). The reflected light of
The light is guided to the surface of the photoreceptor using a reflecting mirror, a lens, etc., and an image corresponding to the original image is formed.

通常、上記照明装置は、スリットの近傍にスリットと平
行に取付けられた細長いランプ(例えば、ハロゲンラン
プ等)と、原稿面の照明を明るく、かつ、均一化するた
めに、上記ランプの周囲に設けられた反射板とで構成さ
れており、この照明装置は、上記スリットと共に移動さ
せている。
Usually, the above-mentioned illumination device includes a long and thin lamp (such as a halogen lamp) installed near the slit and parallel to the slit, and a lamp installed around the lamp in order to brightly and uniformly illuminate the document surface. The illumination device is made up of a reflective plate that is moved along with the slit.

ところが、高速で走査する場合や、照明装置が衝撃を受
けた場合に、上記長尺のランプが振動しやすく、そのた
め、ランプが断線してランプの寿命が縮まるという問題
や、スリット内の照度が変動して、画像にむらが生ずる
という問題があった。
However, when scanning at high speeds or when the illumination device is subjected to impact, the long lamps mentioned above tend to vibrate, resulting in problems such as the lamp breaking and shortening the lamp life, and the illuminance inside the slit. There was a problem in that the image fluctuated, causing unevenness in the image.

、そこで、ランプのガラス管部をホルダにて保持するも
のが提供された(特開昭57−27275号公報参照)
が、消耗品であるランプを交換する場合や、反射板の清
掃をする場合に、ビスを緩めてランプを反射板から取り
外さなければならず、手間がかかって不便であった。
Therefore, a holder for holding the glass tube portion of the lamp was proposed (see Japanese Patent Laid-Open No. 57-27275).
However, when replacing the lamp, which is a consumable item, or cleaning the reflector, the lamp must be removed from the reflector by loosening the screws, which is time-consuming and inconvenient.

また、ランプおよび反射板の少なくとも一方に、防振材
が接触または貼付されたものが提供された(特開昭61
−83832号公報参照)が、防振材としてゴムを用い
るため、走査方向における振動防止効果が弱いという問
題があった。  。
Furthermore, a vibration damping material was provided that was in contact with or attached to at least one of the lamp and the reflector (Japanese Patent Laid-Open No. 61
83832) uses rubber as the vibration isolating material, which has a problem in that the anti-vibration effect in the scanning direction is weak. .

〈発明の目的〉 この発明は上記問題点に鑑みてなされたものであり、ラ
ンプの振動防止効果が高くランプ寿命が延長される共に
、画像のむらが防止され、かつ、ランプの交換が容易に
できる画像形成装置の照明装置を提供することを目的と
する。
<Purpose of the Invention> This invention has been made in view of the above-mentioned problems, and has a high effect of preventing vibration of the lamp, extending the lamp life, preventing unevenness of images, and facilitating lamp replacement. An object of the present invention is to provide a lighting device for an image forming apparatus.

く問題点を解決するための手段〉 上記目的を達成するためのこの発明の画像形成装置の照
明装置としては、長尺のランプおよび反射鏡を有する画
像形成装置の照明装置であって、反射鏡に、ランプの熱
により記憶形状に変形して、ランプの途中部を保持可能
な形状記憶合金製の保持部材を設けていることを特徴と
するものである。
Means for Solving the Problems> A lighting device for an image forming apparatus according to the present invention to achieve the above object is a lighting device for an image forming apparatus having a long lamp and a reflecting mirror. The present invention is characterized in that a holding member made of a shape memory alloy is provided which can be deformed into a memorized shape by the heat of the lamp and can hold an intermediate portion of the lamp.

く作用〉 上記の構成の画像形成装置の照明装置によれば、ランプ
点灯時には、ランプの熱により暖められた形状記憶合金
製の保持部材が、記憶形状に変形してランプの途中部を
保持するので、ランプの振動が防止され、これにより、
ランプ寿命か延長されると共に、画像のむらが防止され
る。また、ランプを交換する場合には、保持部材を変形
させて保持状態を解除することにより、ランプを容易に
取り外せて便利である。
According to the lighting device of the image forming apparatus configured as described above, when the lamp is turned on, the holding member made of a shape memory alloy that is warmed by the heat of the lamp deforms into a memorized shape and holds the middle part of the lamp. So the vibration of the lamp is prevented and this
Lamp life is extended and image unevenness is prevented. Furthermore, when replacing the lamp, the lamp can be conveniently removed by deforming the holding member and releasing the holding state.

〈実施例〉 以下実施例を示す添付図面によって詳細に説明する。<Example> Embodiments will be described in detail below with reference to the accompanying drawings showing examples.

第4図は複写機の内部構成を示す概略図であり、複写機
本体(1)内に、コンタクトガラス(11)上に載置さ
れた原稿を走査露光する光学部(2)、原稿像に対応す
る画像を複写紙上に形成する画像形成部(3)、および
複写紙を搬送する複写紙搬送部(4)が配設されている
。上記光学部(2)は、ランプ(21)、反射鏡(22
)、ミラー(23) (24) (25)、レンズ(2
B)およびミラー(27)により構成されている。上記
反射鏡(22)の端部には、延設部(28)が形成され
、この延設部(28)に、ランプ(21)と平行なスリ
ット(29)が穿設されている(第1図参照)。
FIG. 4 is a schematic diagram showing the internal configuration of a copying machine. Inside the copying machine body (1), there is an optical section (2) that scans and exposes a document placed on a contact glass (11), and an optical section (2) that scans and exposes a document placed on a contact glass (11). An image forming section (3) that forms a corresponding image on copy paper, and a copy paper transport section (4) that transports the copy paper are provided. The optical section (2) includes a lamp (21), a reflecting mirror (22
), mirror (23) (24) (25), lens (2
B) and a mirror (27). An extension part (28) is formed at the end of the reflecting mirror (22), and a slit (29) parallel to the lamp (21) is bored in this extension part (28). (See Figure 1).

そして、ランプ(21)および反射鏡(22) (これ
らを総称して、以下照明装置(A)という)を所定速度
で移動させると共に、ミラー(24) (25)を照明
装置(A)の移動速度の1/2の速度で同一方向に移動
させることにより、コンタクトガラス(11)上に載置
された原稿を照明し、原稿からの反射光をスリット(2
9)、ミラー(23) (24) (25)、レンズ(
26)およびミラー(27)を通して(第4図において
、光路(B)で示す)画像形成部(3)に導く。
Then, the lamp (21) and the reflecting mirror (22) (hereinafter collectively referred to as the lighting device (A)) are moved at a predetermined speed, and the mirrors (24) and (25) are moved to move the lighting device (A). By moving in the same direction at half the speed, the original placed on the contact glass (11) is illuminated, and the reflected light from the original is passed through the slit (2).
9), Mirror (23) (24) (25), Lens (
26) and a mirror (27) (indicated by the optical path (B) in FIG. 4) to the image forming section (3).

第1図は上記照明装置(A)を示す詳細な斜視図であり
、この照明装置(A)は、両端部が電極(30)(31
)に取付けられた長尺のハロゲンランプからなるランプ
(21)と、該ランプ(2I)を略焦点位置に配置した
放物面を形成し、内面が鏡面仕上げされたアルミニウム
板からなる反射鏡(22)と、該反射鏡(22)に取付
けられ、加熱時においてランプ(21)への巻き付き形
状(第2図参照)を記憶させ、冷却時において上記巻き
付きを解除する形状(第3図参照)を記憶させた2方向
性の形状記憶合金からなる保持部材(5)とで構成され
ている。
FIG. 1 is a detailed perspective view showing the lighting device (A), which has electrodes (30) (31
), the lamp (21) is made of a long halogen lamp, and the reflector (2I) is made of an aluminum plate with a mirror-finished inner surface, forming a paraboloid with the lamp (2I) located approximately at the focal point. 22), and a shape that is attached to the reflecting mirror (22), stores the shape of wrapping around the lamp (21) when heated (see Figure 2), and releases the wrapping when cooled (see Figure 3). It is composed of a holding member (5) made of a bidirectional shape memory alloy that stores the following information.

上記保持部材(5)は、ランプ(21)を両側から挾み
込む状態で巻き付くことにより、ランプ(21)を保持
することのできる一対の線材からなっており(第2図お
よび第3図参照)、ランプ(21)の長手方向の途中部
に、少なくとも1箇所以上配置されるものである(第1
図参照)。
The holding member (5) is made of a pair of wire rods that can hold the lamp (21) by wrapping the lamp (21) between both sides (see Figs. 2 and 3). ), the lamp (21) is disposed in at least one place in the middle in the longitudinal direction (the first
(see figure).

また、上記ランプ(21)、反射鏡(22)および保持
部材(5)は、各々、移動枠(6)上に取付けられてお
り、この移動枠(6)は、一方の端部をガイド軸(12
)に係合させると共に、他方の端部をガイドレール(1
3)に支承させることにより、走査方向に往復移動可能
としている。
Further, the lamp (21), the reflecting mirror (22), and the holding member (5) are each mounted on a moving frame (6), and one end of the moving frame (6) is attached to a guide shaft. (12
) and the other end to the guide rail (1
3), it is possible to reciprocate in the scanning direction.

この実施例の構成によれば、ランプ(21)の点灯時に
は、ランプ(21)の熱により暖められた形状記憶合金
製の保持部材(5)が、記憶形状に変形してランプ(2
1)の途中部を保持するので、ランプ(21)の振動が
防止され、これにより、ランプ寿命が延長されると共に
、画像のむらが防止される。また、ランプ(21)の消
灯(冷却)時は、保持部材(5)が記憶形状に変形して
、ランプ(21)の保持状態を解除しているの′で、ラ
ンプ(21)を交換する場合に、ランプ(21)を容易
に取り外せて便利である。
According to the configuration of this embodiment, when the lamp (21) is turned on, the holding member (5) made of a shape memory alloy that is warmed by the heat of the lamp (21) is deformed into a memorized shape and the lamp (21) is turned on.
Since the middle part of 1) is held, vibration of the lamp (21) is prevented, thereby extending the lamp life and preventing unevenness of the image. Also, when the lamp (21) is turned off (cooled down), the holding member (5) deforms into a memorized shape and releases the holding state of the lamp (21), so the lamp (21) must be replaced. It is convenient to be able to easily remove the lamp (21) when the lamp (21) is in use.

なお、この発明の画像形成装置の照明装置は、上記実施
例に限定されるものでなく、例えば、保持部材(5)は
、ランプ(21)の片側のみからランプ(21)を略1
周して巻き付くことにより、ランブク21)を保持する
ものとしても良い。
Note that the illumination device of the image forming apparatus of the present invention is not limited to the above-mentioned embodiment. For example, the holding member (5) may hold the lamp (21) from only one side thereof.
The lamp book 21) may be held by wrapping around it.

また、第5図に示すように、保持部材(5)は、ランプ
(21〉の加熱時において、ランプ(21)の保持形状
を記憶させた1方向性の形状記憶合金で構成し、ランプ
(21)の冷却時においては、圧縮コイルスプリングか
らなる駆動部材(7)により、保持部材(5)の保持状
態を解除する構成とすることもできる。この場合、駆動
部材(7)は設けず、人手により保持部材(5)を変形
させても良い。
Further, as shown in FIG. 5, the holding member (5) is made of a unidirectional shape memory alloy that memorizes the holding shape of the lamp (21) when the lamp (21>) is heated. 21), the holding state of the holding member (5) may be released by a driving member (7) made of a compression coil spring.In this case, the driving member (7) is not provided, The holding member (5) may be deformed manually.

その他、この発明の要旨を変更しない範囲で種々の設計
変更を施すことができる。
In addition, various design changes can be made without changing the gist of the invention.

〈発明の効果〉 以上のように、この発明の画像形成装置の照明装置によ
れば、ランプ点灯時には、ランプの熱により暖められた
形状記憶合金製の保持部材が、記憶形状に変形してラン
プの途中部を保持するので、ランプの振動が防止され、
これにより、ランプ寿命が延長されると共に、画像のむ
らが防止される。
<Effects of the Invention> As described above, according to the lighting device for an image forming apparatus of the present invention, when the lamp is turned on, the holding member made of a shape memory alloy that is heated by the heat of the lamp is deformed into a memorized shape and the lamp is turned on. Since the middle part of the lamp is held, vibration of the lamp is prevented.
This extends lamp life and prevents image irregularities.

また、ランプを交換する場合には、保持部材を変形させ
て保持状態を解除することにより、ランプを容易に取り
外せて便利であるという種々の特有の効果を奏する。
Further, when replacing the lamp, the lamp can be easily removed by deforming the holding member to release the holding state, which provides various unique effects such as convenience.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の画像形成装置の照明装置を示す斜視
図、 第2図および第3図はランプの加熱時および冷却時の保
持部材の形状を示す概略図、 第4図はこの発明の画像形成装置の照明装置を含む複写
機を示す概略図、 第5図はこの発明の他の実施例を示す概略図。 (21)・・・ランプ、   (22)・・・反射鏡、
(5)・・・保持部材。
FIG. 1 is a perspective view showing the lighting device of the image forming apparatus of the present invention, FIGS. 2 and 3 are schematic views showing the shape of the holding member during heating and cooling of the lamp, and FIG. 4 is a perspective view showing the lighting device of the image forming apparatus of the present invention. FIG. 5 is a schematic diagram showing a copying machine including an illumination device of an image forming apparatus. FIG. 5 is a schematic diagram showing another embodiment of the present invention. (21)...Lamp, (22)...Reflector,
(5)...Holding member.

Claims (1)

【特許請求の範囲】 1、長尺のランプおよび反射鏡を有する画像形成装置の
照明装置において、 上記反射鏡に、上記ランプの熱により記憶形状に変形し
て、ランプの途中部を保持可能な形状記憶合金製の保持
部材を設けていることを特徴とする画像形成装置の照明
装置。 2、保持部材が、ランプ消灯時の所定温度で変形して、
ランプの保持を解除する2方向性の形状記憶合金からな
る上記特許請求の範囲第1項記載の画像形成装置の照明
装置。
[Claims] 1. In a lighting device for an image forming apparatus having a long lamp and a reflecting mirror, the reflecting mirror is capable of holding a middle portion of the lamp by being deformed into a memorized shape by the heat of the lamp. A lighting device for an image forming apparatus, characterized in that a holding member made of a shape memory alloy is provided. 2. The holding member deforms at a predetermined temperature when the lamp is turned off,
2. The illumination device for an image forming apparatus according to claim 1, comprising a bidirectional shape memory alloy that releases the holding of the lamp.
JP30186587A 1987-11-30 1987-11-30 Illuminator for image forming device Pending JPH01142626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30186587A JPH01142626A (en) 1987-11-30 1987-11-30 Illuminator for image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30186587A JPH01142626A (en) 1987-11-30 1987-11-30 Illuminator for image forming device

Publications (1)

Publication Number Publication Date
JPH01142626A true JPH01142626A (en) 1989-06-05

Family

ID=17902085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30186587A Pending JPH01142626A (en) 1987-11-30 1987-11-30 Illuminator for image forming device

Country Status (1)

Country Link
JP (1) JPH01142626A (en)

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