JPH0185734U

JPH0185734U -

Info

Publication number: JPH0185734U
Application number: JP17976287U
Authority: JP
Priority date: 1987-11-27
Filing date: 1987-11-27
Publication date: 1989-06-07
Anticipated expiration: 2002-11-27
Also published as: JPH068598Y2

Description

[Brief explanation of the drawing]

第１図はＤＵとＴＵの装着部斜視部、第２図は
ＤＵとＴＵの装着部断面図、第３図はＤＵとＴＵ
の装着状況を軸部水平面で切つた断面図、第４図
はＤＵとＴＵの各ギアと駆動伝達用ギアの配置図
、第５図はＤＵとＴＵの各固定軸と軸受部の詳細
図、第６図は本考案の一実施例であるプリンタの
概略図、第７図ａ，ｂ、第８図ａ，ｂは従来例を
示す図である。１……感光体ドラム、３……現像スリーブ、１
０……現像器、１４……ヒンジ部、１５……帯電
器、１６……印字ヘツド、１７……転写器、１８
……クリーナ、１９……廃トナー容器、２０……
給紙カセツト、２１……給紙コロ、２２……待機
ロール対、２３……定着器、２４……上トレイ、
２５……下トレイ、２６……搬送方向切換装置、
２７……トナー貯留部、２８……トナー撹拌室、
２９……トナー供給ロール、３０……撹拌ロール
、３１……ＤＵ固定軸、３２……ＴＵ固定軸、３
３……本体フレーム、３４……ＤＵ軸受部、３５
……ＴＵ軸受部、３６……ドラムギア、３７……
ＤＵ駆動伝達用ギア、３８……ＴＵ駆動伝達用ギ
ア、３９……スリーブギア、４０……アイドルギ
ア、４１……補給ロール用ギア、４２……撹拌ロ
ール用ギア、４３，４４……壁部。 Figure 1 is a perspective view of the mounting parts of DU and TU, Figure 2 is a sectional view of the mounting parts of DU and TU, and Figure 3 is a sectional view of the mounting parts of DU and TU.
Fig. 4 is a diagram showing the arrangement of the DU and TU gears and drive transmission gears, Fig. 5 is a detailed view of the fixed shafts and bearings of the DU and TU, FIG. 6 is a schematic diagram of a printer which is an embodiment of the present invention, and FIGS. 7a and 7b and 8a and 8b are diagrams showing a conventional example. 1...Photosensitive drum, 3...Developing sleeve, 1
0...Developer, 14...Hinge portion, 15...Charger, 16...Print head, 17...Transfer device, 18
...Cleaner, 19...Waste toner container, 20...
Paper feed cassette, 21... Paper feed roller, 22... Standby roll pair, 23... Fixing device, 24... Upper tray,
25... Lower tray, 26... Conveyance direction switching device,
27... Toner storage section, 28... Toner stirring chamber,
29... Toner supply roll, 30... Stirring roll, 31... DU fixed shaft, 32... TU fixed shaft, 3
3...Main frame, 34...DU bearing section, 35
...TU bearing part, 36...Drum gear, 37...
DU drive transmission gear, 38... TU drive transmission gear, 39... Sleeve gear, 40... Idle gear, 41... Supply roll gear, 42... Stirring roll gear, 43, 44... Wall portion .

Claims

[Scope of utility model registration request]

a first unit casing having at least an image carrier drum on which a latent image is formed; and a second unit casing having at least a developing sleeve facing the image carrier drum and making the latent image visible with a developer. In an image forming apparatus in which a unit casing is detachably attached to the apparatus main body, when the extending portions of the fixed shaft protruding from both ends of the first and second unit casings are dropped from above, a fitting groove capable of fitting and receiving the extension portion; and the first and second fitting grooves.
A drive transmitting portion is provided which can be connected to the image carrier drum and the developing sleeve to transmit drive when the unit casing is mounted on the apparatus main body, and the drive transmitting portion can be connected to the image carrier drum and the developing sleeve to transmit the drive. When the drive is transmitted, each of the extending portions is loosely fitted in the fitting groove so as to be movable in a direction away from each other, and the distance between the image carrier drum and the developing sleeve is set to a distance between the fitting grooves. An image forming apparatus characterized in that positioning and setting are performed via a distance.