JPH04112272U - electrophotographic equipment - Google Patents
electrophotographic equipmentInfo
- Publication number
- JPH04112272U JPH04112272U JP2245791U JP2245791U JPH04112272U JP H04112272 U JPH04112272 U JP H04112272U JP 2245791 U JP2245791 U JP 2245791U JP 2245791 U JP2245791 U JP 2245791U JP H04112272 U JPH04112272 U JP H04112272U
- Authority
- JP
- Japan
- Prior art keywords
- unit
- recording material
- roller
- fixing
- paper
- 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
- 108091008695 photoreceptors Proteins 0.000 claims description 8
- 238000012546 transfer Methods 0.000 description 15
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 210000002784 stomach Anatomy 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
Abstract
(57)【要約】
【目的】 本考案は、定着ローラ対を装置本体側に残置
した場合においても、記録材のちぎれ等が生じることな
く安全且つ容易にジャム処理を行うことの出来る、特に
小型の電子写真装置を提供することを目的とする。
【構成】 本考案は、少なくとも記録材給紙端から熱定
着手段の入口端に至る記録材搬送路の少なくとも一部を
ユニット化した搬送ユニットを設けた点、前記ユニット
を記録材搬送方向に沿って給紙側に向け引き出し可能に
構成した点、前記搬送ユニット引き出し時に装置本体側
に残置される定着ローラ対を設けた点、前記搬送ユニッ
トの引き出し動作と連動させて、前記定着ローラ対の圧
接力を解除可能に構成した点を特徴とするものである。
(57) [Summary] [Purpose] The present invention is a particularly compact device that can safely and easily handle jams without causing the recording material to tear even when the fixing roller pair is left on the main body side of the device. The purpose is to provide an electrophotographic device. [Structure] The present invention provides a transport unit that unitizes at least a part of the recording material transport path from the recording material feeding end to the inlet end of the heat fixing means, and that the unit is arranged along the recording material transport direction. A pair of fixing rollers are provided that remain on the main body side of the apparatus when the conveyance unit is pulled out, and the pair of fixing rollers is brought into pressure contact with each other in conjunction with the pulling out operation of the conveyance unit. It is characterized by a structure in which the force can be released.
Description
【０００１】0001
本考案はファクシミリ、プリンタ、複写機として適用される小型の電子写真装 置に係り、特に定着位置付近における記録材のジャム処理の容易化を図った電子 写真装置に関する。 This invention is a small electrophotographic device that can be used as a facsimile, printer, or copier. An electronic system designed to facilitate the removal of jams in recording materials, especially near the fusing position. Concerning photographic equipment.
【０００２】0002
従来より小型の電子写真装置においてはジャム処理の容易化を図るために、記録 紙搬送路上に沿って上部本体と下部本体を分割開放可能に構成するのが一般的で ある。 しかしながら本体分割開放形構造を取ると、夫々の本体側に前記開放動作に耐 えるだけの精度と剛性度を必要とするのみならず、開放動作を軽減するためのス プリング等も必要とし、装置構成の煩雑化と重量負担の増大につながる。 Conventionally, in smaller electrophotographic devices, recording It is common to configure the upper and lower bodies to be able to be separated and opened along the paper conveyance path. be. However, if the main body is split into an open type structure, each main body has a structure that can withstand the opening operation. In addition to requiring sufficient precision and rigidity to Pulling and the like are also required, which leads to a complicated device configuration and an increased weight burden.
【０００３】 又前記装置においては現像装置を上部本体側に配設するのが常であるが、この様 な構成を取ると上部本体開放動作の際に加わる衝撃力により現像装置内の現像ス リーブに担持されたトナーが脱離落下し、機内や記録紙搬送路の汚染が生じ易い 。0003 In addition, in the above-mentioned apparatus, the developing device is usually arranged on the upper main body side; If this configuration is adopted, the impact force applied when the upper body is opened will damage the developing device. The toner carried on the sleeve can easily fall off and cause contamination of the inside of the machine and the recording paper transport path. .
【０００４】 かかる欠点を解消する為に、前記搬送路上に取り付けた給紙ローラ、レジスト ローラ、転写ローラ、搬送ガイド及び定着ローラ対を一体に組込んだ搬送ユニッ トを形成し、該搬送ユニットをドラム軸方向に沿って取り出し可能にした装置が 提案されている。（特開昭６４ー２０５６４号）0004 In order to eliminate this drawback, paper feed rollers and resistors installed on the conveyance path A transport unit that integrates rollers, transfer rollers, transport guides, and a pair of fixing rollers. There is a device in which the transport unit can be taken out along the drum axis direction. Proposed. (Unexamined Japanese Patent Publication No. 64-20564)
【０００５】 しかしながら前記のように記録紙搬送方向と直交する方向に沿ってユニットを 引出し可能に構成する事はジャム紙が感光体ドラム等にひっかかり易く、該ドラ ムを損傷する恐れがある。 この為特公平２ー３５３１４号に示す様に前記ユニットを定着ローラを含むユ ニットとその上流側のユニットに分割し、夫々のユニットを互いに離反する方向 に、記録材搬送路と平行に引出し可能に取り付けた事を特徴とする技術が開示さ れている。[0005] However, as mentioned above, the unit is moved along the direction perpendicular to the recording paper conveyance direction. A structure that can be pulled out prevents jammed paper from getting caught on the photoreceptor drum, etc. There is a risk of damaging the system. For this reason, as shown in Japanese Patent Publication No. 2-35314, the unit is replaced with a unit including a fixing roller. Divide into the knit and its upstream unit, and move each unit away from each other. , a technology is disclosed in which the recording material is attached so that it can be pulled out parallel to the recording material conveyance path. It is.
【０００６】[0006]
しかしながら前記装置においてはジャム位置に応じて装置本体の両側壁（若し くは前後壁）の夫々の側にユニットを引出す構成を取るために、ジャム処理の操 作空間が無用に大になると共に処理動作も煩雑化する。 又前記の構成を取ると定着ローラとレジストローラ若しくは転写ローラ（転写 手段を転写ローラで構成した場合）間に記録材が挟持された状態でユニット体を 装置本体より引出そうとした場合において前記記録材が前記ローラ間で挟持され た状態で引張される事になるために、該記録材が破断してしまう。 However, in the above device, depending on the jam position, the side walls of the device body (or The jam handling operation can be configured to pull out the unit on each side of the front or rear walls). The work space becomes unnecessarily large and the processing operations become complicated. Also, if the above configuration is adopted, the fixing roller and registration roller or transfer roller (transfer roller) (If the means is composed of a transfer roller) When attempting to pull out the recording material from the main body of the apparatus, the recording material may be pinched between the rollers. Since the recording material is pulled under the condition that the recording material is in a state of being stretched, the recording material breaks.
【０００７】 又定着ローラ対をユニット化せずに装置本体側に固定させ、その上流側に位置 する搬送ユニットのみを搬送方向に沿って給紙側に引出し可能に構成した装置も 提案されている（特開昭６０ー６３５６３）が、かかる装置においても定着ロー ラが装置本体側にあるために、定着ローラとレジストローラ若しくは転写ローラ （転写手段を転写ローラで構成した場合）間に記録材が挟持された状態でユニッ ト体を装置本体より引出そうとした場合やはり前記と同様に破断してしまう。 又前記のようにローラ両端に挟持されない場合でも、記録材の一端が定着ロー ラ側に挟持された状態でジャムが発生した場合にその上流側に位置する搬送ユニ ットを装置外に引出しても前記ジャム紙が前記定着ローラに挟持されたままの状 態となり、該定着部のトナーがローラ側に固着されてしまうのみならず火災の危 険性すらある。 更に前記記録材が挟持される定着ローラを装置本体側に残置させる事は、該定 着ローラに記録材終端側が挟持された状態でその排紙側でジャムが発生した場合 においてもその取り出しが煩雑化するとともに、紙のちぎれ等も発生し易い。[0007] Also, the fixing roller pair is not made into a unit, but is fixed to the main body of the device, and located upstream of it. There is also a device that is configured so that only the transport unit that is used can be pulled out toward the paper feed side along the transport direction. Although it has been proposed (Japanese Unexamined Patent Publication No. 60-63563), the fixing roller is not used in such a device. Since the roller is located on the main body side of the device, the fuser roller and registration roller or transfer roller (When the transfer means is composed of a transfer roller) If an attempt is made to pull out the body from the main body of the apparatus, it will break in the same way as described above. Also, even if the recording material is not sandwiched between both ends of the rollers as described above, one end of the recording material will not be held between the fixing rollers. If a jam occurs while being held on the Even if the sheet is pulled out of the device, the jammed paper remains pinched by the fixing roller. This will not only cause the toner in the fixing section to stick to the roller side, but also pose a risk of fire. It's even dangerous. Furthermore, leaving the fixing roller on which the recording material is sandwiched in the main body of the apparatus is suitable for certain purposes. If a jam occurs on the output side of the recording material with the end of the recording material being pinched by the arrival roller. In addition, it becomes complicated to take out the paper, and the paper is likely to be torn.
【０００８】 本考案はかかる従来技術の欠点に鑑み、定着ローラ対を装置本体側に残置した 場合においても、記録材のちぎれ等が生じることなく安全且つ容易にジャム処理 を行うことの出来る電子写真装置を提供することを目的とする。 又本考案は操作者の重量負担が増大することなく、容易にジャム処理を可能に した電子写真装置を提供することを目的とする。[0008] In view of the drawbacks of the conventional technology, the present invention leaves the pair of fixing rollers on the main body of the device. Safely and easily removes jams without causing any tearing of the recording material The purpose of the present invention is to provide an electrophotographic device capable of performing the following. Additionally, this invention allows for easy jam removal without increasing the operator's weight burden. The purpose of the present invention is to provide an electrophotographic device that has the following features.
【０００９】[0009]
本考案は、 少なくとも記録材給紙端から該記録材上に転写された未定着トナー像の画像定 着を行う熱定着手段の入口端に至る記録材搬送路の少なくとも一部をユニット化 した搬送ユニットを設けた点 即ち、前記搬送ユニットはレジストローラから定着ローラ対入口端に至る記録 材搬送系を一体化してあれば給紙ローラ、更には給紙カセットや手差し給紙部を 含めてユニット化してもよい。 前記ユニットを感光体ドラムのほぼ接線方向に沿って、言い換えれば記録材搬 送方向に沿って給紙側に向け引き出し可能に構成した点、 前記搬送ユニット引き出し時に装置本体側に残置される定着ローラ対を設けた 点，即ち定着ローラ対を残置させたが故に、その上流側に位置する搬送ユニット がドラム接線方向に給紙側に向けユニット引き出しを容易に行う事が出来る。 前記搬送ユニットの引き出し動作と連動させて、前記定着ローラ対の圧接力を 解除可能に構成した点 を特徴とするものである。 This idea is Image definition of an unfixed toner image transferred onto the recording material from at least the feeding end of the recording material At least a part of the recording material conveyance path leading to the entrance end of the heat fixing means for fixing the recording material is made into a unit. The point is that a conveyor unit has been installed. That is, the conveyance unit carries the recording from the registration roller to the inlet end of the fixing roller. If the material conveyance system is integrated, the paper feed roller, furthermore, the paper feed cassette and manual paper feed section can be installed. It may also be combined into a unit. The unit is moved along the tangential direction of the photoreceptor drum, in other words, the recording material is transported. The structure is configured so that it can be pulled out toward the paper feed side along the feeding direction. A pair of fixing rollers are provided that remain on the apparatus main body side when the transport unit is pulled out. Because the fixing roller pair is left behind, the transport unit located upstream of the fixing roller pair is The unit can be easily pulled out in the tangential direction of the drum toward the paper feed side. The pressure contact force of the pair of fixing rollers is increased in conjunction with the pull-out operation of the transport unit. Points configured to be removable It is characterized by:
【００１０】 この場合、前記引出し動作と連動させてとは、必ずしも引出し動作開始直後に 前記定着ローラ対の圧接力を解除させる場合のみを指すのではなく、例えば給紙 端側にジャムが生じている場合は特に解除の必要がなく、この為その引出し動作 の途中位置若しくは２段階に分けてユニット引出しを行うような装置にあっては その２段階目の引き出し時に前記圧解除を行うように構成してもよい。 又、前記考案は搬送ユニットと給紙カセットと一体的に構成してもよく、又給 紙カセットと夫々別体に取り出し可能に構成してもよく、これらは設計上の問題 である。0010 In this case, "in conjunction with the withdrawal operation" does not necessarily mean immediately after the withdrawal operation starts. This does not refer only to the case where the pressure contact force between the pair of fixing rollers is released; for example, when feeding paper. If there is a jam on the end side, there is no need to clear it, and for this reason, the withdrawal operation For devices where the unit is pulled out in the middle or in two stages, The pressure may be released during the second stage of withdrawal. Further, the above invention may be configured integrally with the transport unit and the paper feed cassette, or the paper feed cassette may be integrated with the transport unit. It is also possible to configure the paper cassette so that it can be taken out separately from the paper cassette, but this is a design problem. It is.
【００１１】[0011]
本考案によれば、定着ローラ対をユニット化せずに装置本体側に残置させつつ 、前記ユニット引き出し動作と連動して定着ローラ対間の圧接力が解除されるよ う構成した為に、前記ユニット上でジャムが発生した場合は勿論の事、例え記録 紙の一端が定着ローラ側に挟持された状態でジャムが発生した場合においてもそ の上流側に位置する搬送ユニットを装置外に引出す事により前記ジャム紙が定着 ローラに対しフリーの状態になるために、容易にその取り出しが可能である。 又前記の構成ではユニット引き出しと同時にジャム紙の定着ローラ対の挟持が 解除され、言い換えればジャム紙の熱接触が解除される為に定着ローラを通電さ せておいた場合でも火災の危険がなく又定着ローラ側へのトナー固着も防止出来 る。又該ローラは常に給紙側のユニット開口部より奥まった装置本体内に位置し ている為に前記ジャム処理の際に誤って手に触れる恐れもなく、この面でも安全 である。 According to the present invention, the fixing roller pair is left on the device main body side without being made into a unit. , the pressure contact force between the pair of fixing rollers is released in conjunction with the unit pull-out operation. If a jam occurs on the unit due to the Even if a jam occurs with one end of the paper being pinched by the fixing roller, the The jammed paper is fixed by pulling out the transport unit located upstream of the device. Since it is free from the rollers, it can be easily taken out. Furthermore, in the above configuration, the pair of fixing rollers for the jammed paper are held together at the same time as the unit is pulled out. In other words, the fuser roller is energized in order to release the thermal contact of the jammed paper. There is no risk of fire even if the toner is left on the fuser roller side, and it also prevents toner from sticking to the fixing roller side. Ru. Also, the roller is always located inside the device body deeper than the unit opening on the paper feed side. Because of this, there is no risk of accidentally touching your hands when handling the jam, and it is safe in this aspect as well. It is.
【００１２】 又ジャム紙の定着ローラ対の挟持が解除されることは、装置本体側に残置した 定着ローラと搬送ユニット側のレジストローラ若しくは転写ローラ間に記録材が 挟持された状態でユニット体を装置本体より引出そうとした場合でもジャム紙が 破断する恐れがなくなる。0012 Also, the fixing roller pair of the jammed paper is released from the jammed paper by the There is recording material between the fixing roller and the registration roller or transfer roller on the transport unit side. Even if you try to pull out the unit body from the main body of the device while it is being pinched, the jammed paper will There is no risk of breakage.
【００１３】 更に本考案は、定着ローラに記録材終端側が挟持された状態でその排紙側でジ ャムが発生した場合においても、前記搬送ユニットの一部を引出すのみで該挟持 が解除されるために、その状態で単に排紙側を開放する事により、紙のちぎれ等 が生じる事なくその取り出しが容易化する。[0013] Furthermore, with this invention, when the trailing edge of the recording material is held between the fixing rollers, the paper is Even if a jam occurs, simply pulling out a part of the conveyance unit will remove the jam. In order to release the paper, simply opening the paper ejection side in this state will prevent the paper from tearing, etc. This makes it easy to take out the product without causing any problems.
【００１４】[0014]
以下、図面に基づいて本考案の実施例を例示的に詳しく説明する。但しこの実 施例に記載されている構成部品の寸法、材質、形状、その相対配置などは特に特 定的な記載がない限りは、この考案の範囲をそれのみに限定する趣旨ではなく単 なる説明例に過ぎない。 図２は本考案の実施例に係るページプリンタの内部構成を示す。 その構成を詳述するに、本装置は図上右方を操作面側とする略方形体状をなし 、その略中央部に感光体ドラム１を配すると共に、該感光体ドラム１の回転方向 に沿って上方位置に露光用光学系２、右方位置に現像装置３、下方に転写器４、 及び左方にクリーニング手段５とイレーサ６と帯電器６１を夫々配置し、前記感 光体ドラム１を矢印方向に回転させながら公知の電子写真プロセスを行うように 構成している。 Hereinafter, embodiments of the present invention will be described in detail based on the drawings. However, this fruit The dimensions, materials, shapes, and relative positions of the components described in the examples are particularly specific. Unless there is a specific description, the scope of this invention is not intended to be limited to only that. This is just an illustrative example. FIG. 2 shows the internal configuration of a page printer according to an embodiment of the present invention. To explain its configuration in detail, this device has a roughly rectangular shape with the operation surface on the right side in the figure. , the photoreceptor drum 1 is disposed approximately in the center thereof, and the rotation direction of the photoreceptor drum 1 is Along the line, there is an exposure optical system 2 at an upper position, a developing device 3 at a right position, a transfer device 4 at a lower position, A cleaning means 5, an eraser 6, and a charger 61 are arranged on the left side, respectively. A known electrophotographic process is performed while rotating the optical drum 1 in the direction of the arrow. It consists of
【００１５】 又前記感光体ドラム１下方には前記転写器４及び給紙カセット７等が一体的に 組込まれた搬送ユニット１０が装置内ほぼ全域に亙って配設され、そして該ユニ ット１０は図上右方の操作面側に設けた開口部２１より給紙カセット７と共に一 体的に引出し可能に構成している。 即ち前記搬送ユニット１０は装置底域のほぼ全面に亙って形成された給紙カセ ット収納部１１と、該収納部１１上面の、前記ドラム１転写位置のほぼ接線方向 に沿って搬送路が形成されているユニット本体１２からなり、該本体１２は図上 右方のカセット７給紙端側より搬送路上に沿って順次給紙ローラ８、レジストロ ーラ対９、転写器４、及び定着ユニット３０入口端まで延設する搬送ガイド１３ を形成すると共に、該搬送ガイド１３の終端を段差状に下方に向け折曲させた後 、収納部上壁１１１と連設する。[0015] Further, below the photosensitive drum 1, the transfer device 4, paper feed cassette 7, etc. are integrated. A built-in transport unit 10 is disposed over almost the entire area inside the device, and the unit The cutter 10 is inserted together with the paper feed cassette 7 through an opening 21 provided on the operation surface side on the right side of the figure. It is structured so that it can be physically pulled out. That is, the transport unit 10 has a paper feed cassette formed over almost the entire bottom area of the apparatus. The sheet storage portion 11 and the upper surface of the storage portion 11 in a substantially tangential direction of the transfer position of the drum 1. It consists of a unit main body 12 along which a conveyance path is formed, and the main body 12 is From the paper feed end of the right cassette 7, the paper feed roller 8 and registration roller are sequentially moved along the conveyance path. roller pair 9, transfer device 4, and conveyance guide 13 extending to the inlet end of the fixing unit 30. , and after bending the terminal end of the conveyance guide 13 downward in a stepped shape. , are connected to the upper wall 111 of the storage section.
【００１６】 又収納部上壁１１１は前記連設位置基側より排紙側へ水平に延設すると共に、 定着ユニット３０と対面する箇所で傾斜段差１１２を介して、該段差１１２の排 紙側１１ａを僅かに下方に下げた状態で水平方向に延設させている。 一方収納部１１下面側には、装置前壁側に設けた係合凹部２２と係合可能な係 合突起１１３を設け、搬送ユニット１０引出しの際に該ユニット１０が途中位置 で係止されるように構成する。[0016] Further, the upper wall 111 of the storage section extends horizontally from the base side of the continuous position to the paper discharge side, and Through the inclined step 112 at the location facing the fixing unit 30, the discharge of the step 112 is performed. It is extended horizontally with the paper side 11a slightly lowered. On the other hand, on the lower surface side of the storage section 11, there is an engagement that can be engaged with an engagement recess 22 provided on the front wall side of the device. A mating protrusion 113 is provided so that when the transport unit 10 is pulled out, the unit 10 is placed in an intermediate position. It is configured so that it is locked in place.
【００１７】 又前記収納部１１内には給紙カセット７着脱自在に装着されており、前記搬送 ユニット１０を装置本体側に装着した状態で、若しくは搬送ユニット１０を着脱 した後、図２に示すように搬送ユニット１０から給紙カセット７を取り出すこと が出来、給紙若しくはカセット７交換の容易化を達成し得る。[0017] Further, a paper feed cassette 7 is removably installed in the storage section 11, and the paper feed cassette 7 With the unit 10 attached to the device main body side, or with the transfer unit 10 attached and detached. After that, take out the paper feed cassette 7 from the transport unit 10 as shown in FIG. This makes it possible to easily feed paper or replace the cassette 7.
【００１８】 一方定着ユニット３０は後記に詳説するように定着ローラ対３１とその出口側 に配した排紙ローラ対３２からなり、そして前記定着ユニット３０の下流側に配 した切換えレバー２３の切換え操作により、画像定着後の記録材が反転ガイド２ ４を介して装置上面側への排紙と、装置左側壁に設けた排紙トレー２５上への排 紙を選択的に行えるように構成している。[0018] On the other hand, the fixing unit 30 includes a pair of fixing rollers 31 and its exit side, as will be explained in detail later. and a pair of paper ejecting rollers 32 disposed on the downstream side of the fixing unit 30. By switching the switching lever 23, the recording material after fixing the image is moved to the inversion guide 2. 4 to the top side of the device, and to the paper output tray 25 provided on the left side wall of the device. It is configured so that paper can be selectively used.
【００１９】 又装置本体は、反転ガイド２４を含めて左側壁から装置上面の排紙部を通って 現像装置３上面側の装置上壁に至るハウジング部２６を排紙側に設けた不図示の 支点を中心として分割開放可能に構成し、これにより現像装置３におけるトナー 交換と、排紙ガイド１３内のジャム処理の容易化を図っている。 この場合現像装置３や感光体ドラム１及び定着ユニット３０はいずれも装置本 体側に残置する構成を取るために、分割開放されるハウジング部２６の重量負担 がなく、而もトナー飛散や定着ローラのヒートローラ部３１ａが露出する事がな い。[0019] In addition, the main body of the device, including the reversing guide 24, passes from the left side wall through the paper ejection section on the top of the device. A housing portion 26 (not shown) extending to the upper wall of the developing device 3 on the upper surface side is provided on the paper ejection side. The structure is configured so that it can be opened in parts around the fulcrum, thereby allowing the toner in the developing device 3 to be separated and opened. This is intended to facilitate replacement and clearing of jams in the paper ejection guide 13. In this case, the developing device 3, photoreceptor drum 1, and fixing unit 30 are all The weight burden of the housing part 26, which is split open to take a configuration that remains on the body side, is reduced. There is no risk of toner scattering or exposure of the heat roller portion 31a of the fixing roller. stomach.
【００２０】 次に本考案の要部構成たる定着ユニット３０と搬送ユニット１０の嵌合／脱離 構造について図１に基づいて説明する。 先ず搬送ユニット１０は図１（ａ）に示すようにカセット７収納部１１の幅方 向長さをユニット本体１２の幅長より僅かに大に設定し、該収納部上壁１１１の 縁側が定着ユニット３０の軸方向両端壁３３の下端側と対面可能に形成する。 一方定着ユニット３０は、前記両端壁３３間に軸支されているヒートローラ３ １ａと該ローラ３１ａと同期回転する圧接ローラ３１ｂを有し、前記圧接ローラ ３１ｂはその軸端側の揺動機構３４を介してヒートローラ３１ａと離接する方向 に揺動可能に構成されている。[0020] Next, the fixing unit 30 and the transport unit 10, which are the main components of the present invention, are fitted/disconnected. The structure will be explained based on FIG. First, the transport unit 10 is moved in the width direction of the cassette 7 storage section 11 as shown in FIG. 1(a). The vertical length is set to be slightly larger than the width of the unit main body 12, and the upper wall 111 of the storage section is The edge side is formed so as to be able to face the lower end sides of both axial end walls 33 of the fixing unit 30 . On the other hand, the fixing unit 30 includes a heat roller 3 that is pivotally supported between the both end walls 33. 1a and a pressure roller 31b rotating synchronously with the roller 31a, the pressure roller 31b 31b is a direction in which the heat roller 31a comes into contact with and separates from it via the swinging mechanism 34 on the shaft end side. It is configured to be able to swing.
【００２１】 即ち前記揺動機構３４は、前記圧接ローラ３１ｂの軸に係合し支点３５１を中 心としてヒートローラ３１ａと離接する方向に揺動するレバー部材３５と、該レ バー部材３５のローラ出口側下面とユニット底面との間に配設され該レバー部材 ３５に上方に向け弾性力を付勢する一の圧接バネ３６と、前記レバー部材３５の 下面側に沿って延設し、定着ユニット入口側下端に設けた支点３７１を中心に揺 動する作動レバー３７と、該作動レバー３７の右端側と端壁３３間に係合され、 作動レバー３７を反時計方向に揺動させる事によりレバー部材３５を介して圧接 ローラ３１ｂをヒートローラ３１ａより離間する方向に弾性力を付勢する離間バ ネ３８とを有し、前記作動レバー３７の他端側を、定着ユニット３０下面を越え て給紙収納部上壁１１１の傾斜段差１１２位置まで延設し、その自由端にローラ ３９を軸支し、収納部上壁１１１を相対的に移動可能に構成する。[0021] That is, the swing mechanism 34 engages with the shaft of the pressure roller 31b and rotates around the fulcrum 351. A lever member 35 that pivots in the direction of coming into contact with and separating from the heat roller 31a, and The lever member is disposed between the lower surface of the bar member 35 on the roller outlet side and the bottom surface of the unit. A press spring 36 that applies an elastic force upward to the lever member 35; It extends along the lower surface side and swings around a fulcrum 371 provided at the lower end on the entrance side of the fixing unit. an operating lever 37 that moves, and is engaged between the right end side of the operating lever 37 and the end wall 33; By swinging the actuating lever 37 counterclockwise, pressure is applied via the lever member 35. A separation bar applies elastic force in a direction to separate the roller 31b from the heat roller 31a. The other end side of the operating lever 37 extends beyond the lower surface of the fixing unit 30. and extends to the inclined step 112 position of the upper wall 111 of the paper feed storage section, and a roller is installed at the free end thereof. 39 is pivotally supported, and the storage section upper wall 111 is configured to be relatively movable.
【００２２】 次にかかる実施例の動作を説明する。 先ず所定の電子写真動作を行う場合は、搬送ユニット１０側では給紙ローラ８ を利用して、給紙収納部１１より記録材を搬送路始端側に反転給紙した後、レジ ストローラ９の入口端で一旦待機させる。 一方感光体ドラム１側では、その回転により露光光学系２により書込まれた潜 像を現像装置３により可視像化した後、該トナー像始端と同期させて前記レジス トローラ９の入口端に待機させた記録材を転写位置に導き、未定着トナー像の転 写を行った後、該記録材を搬送ガイド１３を介して定着ローラ対３１に挿通し、 画像定着を行った後、排紙ローラ３２に導かれる。 そして頁揃えを行う場合は切換えレバー２３を下側に切換え、反転排紙ガイド ２４を介して装置上面側に排紙され、又切換えレバー２３を上側に切換える事に よりトナー像が上向きのまま排紙トレー２５上に排紙される。[0022] Next, the operation of this embodiment will be explained. First, when performing a predetermined electrophotographic operation, the paper feed roller 8 is After reversing and feeding the recording material from the paper feed storage section 11 to the start end of the conveyance path using the It is made to wait at the entrance end of the stroller 9. On the other hand, on the photosensitive drum 1 side, the latent data written by the exposure optical system 2 is After the image is visualized by the developing device 3, the register is removed in synchronization with the starting edge of the toner image. The recording material that is waiting at the entrance end of the roller 9 is guided to the transfer position, and the unfixed toner image is transferred. After copying, the recording material is inserted into the fixing roller pair 31 via the conveyance guide 13, After the image is fixed, the sheet is guided to a discharge roller 32. Then, when performing page alignment, switch the switching lever 23 to the lower side and reverse the paper ejection guide. 24 to the top side of the device, and by switching the switching lever 23 to the upper side. The paper is then discharged onto the paper discharge tray 25 with the toner image facing upward.
【００２３】 そして記録材の交換を行う場合は、給紙カセット７のみを取り出せばよく、又 前記記録動作中に給紙側でジャムが生じた場合は前記搬送ユニット１０を引出す 事により、先ずユニット下面側の係合突起１１３が、装置前壁側に設けた係合凹 部２２と係合し転写位置までの搬送面が引出され、その部分に発生しているジャ ム紙を除去できる。 そして更に定着ユニット３０入口側にジャムが発生している場合は前記ユニッ ト１０を多少上側に持上げながら更に引出す事により、該ユニット１０全体を取 り出す事が出来る。[0023] When replacing the recording material, you only need to take out the paper feed cassette 7, or If a jam occurs on the paper feeding side during the recording operation, pull out the transport unit 10. First, the engagement protrusion 113 on the bottom side of the unit will fit into the engagement recess provided on the front wall of the device. The conveyance surface that engages with the portion 22 and reaches the transfer position is pulled out, and the jam generated in that portion is removed. It is possible to remove sticky paper. Furthermore, if a jam occurs on the inlet side of the fixing unit 30, the unit By lifting the unit 10 slightly upward and pulling it out further, remove the entire unit 10. You can take it out.
【００２４】 尚、前記いずれの場合においても記録材の始端側が前記定着ローラ対３１に噛 み込んでいる場合にも後記に詳説するように前記ユニット１０引き出し動作と連 動して前記ローラ対３１間の圧接が解除される為に前記ユニット１０引出し後、 その給紙側の記録材端部を引張る事により容易にジャム処理が可能となる。[0024] In any of the above cases, the starting end side of the recording material is bitten by the pair of fixing rollers 31. Even if the unit 10 is fully inserted, the unit 10 can be pulled out in conjunction with the operation as described in detail later. After the unit 10 is pulled out, the pressure contact between the pair of rollers 31 is released. By pulling the end of the recording material on the paper feeding side, it is possible to easily clear the jam.
【００２５】 一方定着器下流側の反転ガイド２４内でジャムが生じた場合は、先ず前記搬送 ユニット１０を僅かに引出し前記ローラ対３１間の圧接を解除した後、左側壁か ら置上壁に至るハウジング部２６を分割開放する事により、排紙ガイド１３が開 放され而もローラ対３１間に記録材の終端が存在する場合でもその部分の圧接が 解除されている為に、簡単にジャム処理を行う事が出来る。 この場合現像装置３や感光体ドラム１及び定着ユニット３０はいずれも装置本 体側に残置する構成を取るために、分割開放されるハウジング部２６の重量負担 がなく、而もトナー飛散や定着ローラのヒートローラ部３１ａが露出する事がな い。[0025] On the other hand, if a jam occurs in the reversing guide 24 on the downstream side of the fuser, first After pulling out the unit 10 slightly and releasing the pressure contact between the pair of rollers 31, the left side wall The paper ejection guide 13 can be opened by splitting and opening the housing part 26 from the top to the upper wall. Even if the recording material is released and there is an end of the recording material between the pair of rollers 31, there is no pressure contact at that part. Since the jam has been released, the jam can be easily cleared. In this case, the developing device 3, photoreceptor drum 1, and fixing unit 30 are all The weight burden of the housing part 26, which is split open to take a configuration that remains on the body side, is reduced. There is no risk of toner scattering or exposure of the heat roller portion 31a of the fixing roller. stomach.
【００２６】 次に前記定着ローラ３１対の圧接解除動作について詳細に説明するに、 先ず、前記搬送ユニット１０装着時においては、前記定着ユニット３０側の作 動レバー３７は収納部上壁１１１面により圧接バネ３６の弾性力に抗して該バネ ３６を引張する方向に維持されている為に、レバー部材３５はヒートローラ３１ ａの圧接する方向に回動させる事が出来、出口側の圧接バネ３６を利用して圧接 ローラ３１ｂをヒートローラ３１ａと圧接させる事が出来る。（図１(ａ)参照） 一方この状態で、ユニット１０を引出すとその引出し操作と連動して作動レバ ー３７自由端が傾斜段差部１１３を介して収納部上壁の排紙面１１４側に落ち込 み、該作動レバー３７が離間バネ３８の付勢力により反時計方向に回動し、これ によりレバー部材３５を介して圧接ローラ３１ｂが離間し、記録材の圧接が解除 される。（図１(ｂ)参照）[0026] Next, the operation of releasing the pressure contact between the pair of fixing rollers 31 will be explained in detail. First, when the transport unit 10 is installed, the operation of the fixing unit 30 is The movable lever 37 resists the elastic force of the pressure contact spring 36 by the surface of the upper wall 111 of the storage portion, and presses the spring 36. Since the lever member 35 is maintained in the direction of pulling the heat roller 31 It can be rotated in the pressure welding direction of a, and the pressure welding can be done using the pressure welding spring 36 on the outlet side. The roller 31b can be brought into pressure contact with the heat roller 31a. (See Figure 1(a)) On the other hand, when the unit 10 is pulled out in this state, the operating lever is activated in conjunction with the pull-out operation. -37 free end drops to the paper discharge surface 114 side of the upper wall of the storage section through the inclined step part 113 Then, the operating lever 37 is rotated counterclockwise by the biasing force of the separation spring 38. The pressure roller 31b is separated via the lever member 35, and the pressure contact of the recording material is released. be done. (See Figure 1(b))
【００２７】 又前記ジャム処理後搬送ユニット１０を再装着することにより、前記操作と逆 に圧接ローラ３１ｂがヒートローラ３１ａ側に圧接される。 尚、前記動作中は、ヒートローラ３１ａは通電状態を維持し搬送ユニット１０ が完全に離脱することによりヒートローラ３１ａの通電をＯＦＦするよう構成し てもよくこれにより、実際のメインテナンス時には該ローラの通電が阻止され安 全確保が容易である。[0027] In addition, by reinstalling the conveyance unit 10 after the jam removal, the above operation can be reversed. The pressure roller 31b is pressed against the heat roller 31a side. Note that during the above operation, the heat roller 31a remains energized and the transport unit 10 When the heat roller 31a is completely detached, the power to the heat roller 31a is turned off. This may prevent the roller from being energized during actual maintenance, making it safer. It is easy to secure everything.
【００２８】[0028]
以上記載した如く本考案は定着ローラ対を装置本体側に残置した場合において も、操作者の負担が増大することなく、安全且つ容易にジャム処理を行うことが 出来る。 又本考案はジャムが発生した場合において搬送ユニットを僅かに引出す事によ り該ジャムした記録材が定着ローラに対し常にフリーの状態になるために、容易 にその取り出しが可能であると共に、該ジャム紙の熱接触が解除される為に定着 ローラを通電させておいた場合でも火災の危険がなく又定着ローラ側へのトナー 固着も防止出来、特に再定着動作を速やかに行う事が出来る。 等の種々の著効を有す。 As described above, the present invention is applicable when the fixing roller pair is left on the main body side of the device. It is also possible to safely and easily clear jams without increasing the burden on the operator. I can do it. In addition, this invention allows the conveyance unit to be pulled out slightly in the event of a jam. Since the jammed recording material is always free from the fixing roller, it is easy to It is possible to take out the jammed paper, and the thermal contact of the jammed paper is released, so it is fixed. There is no risk of fire even if the roller is energized, and toner does not reach the fuser roller side. Sticking can also be prevented, and in particular, the re-fixing operation can be performed quickly. It has various effects such as
【図面の簡単な説明】[Brief explanation of drawings]
【図１】本考案の実施例に係る電子写真装置内に組込ま
れた定着ユニットと搬送ユニットの関係を示す拡大図
で、（ａ）は搬送ユニットを装着している状態、（ｂ）
は搬送ユニットを引出している状態を示す。FIG. 1 is an enlarged view showing the relationship between a fixing unit and a transport unit incorporated in an electrophotographic apparatus according to an embodiment of the present invention, (a) shows a state in which the transport unit is installed, (b)
indicates that the transport unit is being pulled out.
【図２】図１に示す電子写真装置の全体構成図。FIG. 2 is an overall configuration diagram of the electrophotographic apparatus shown in FIG. 1.
１ 感光体ドラム ３０ 定着ユニット １０ 搬送ユニット ３４ 揺動機構 １１２ 傾斜段差 1 Photoreceptor drum 30 Fusing unit 10 Transport unit 34 Swing mechanism 112 Slope step
Claims (1)
た未定着トナー像の画像定着を行う熱定着手段の入口端
に至る記録材搬送路の少なくとも一部をユニット化し、
該ユニット体を感光体ドラム軸線とほぼ直交する方向に
沿って引き出し可能に構成すると共に、該ユニット引き
出し動作開始から終了するまでの任意時期に、該引き出
し動作と連動させて装置本体側に残置させた定着ローラ
の圧接力を解除可能に構成した事を特徴とする電子写真
装置1. At least a portion of a recording material transport path from a recording material feeding end to an inlet end of a thermal fixing means for fixing an unfixed toner image transferred onto the recording material is unitized,
The unit body is configured to be able to be pulled out along a direction substantially perpendicular to the axis of the photoreceptor drum, and left on the apparatus main body side in conjunction with the pull-out operation at any time from the start to the end of the unit pull-out operation. An electrophotographic apparatus characterized in that the pressure contact force of the fixing roller can be released.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2245791U JPH04112272U (en) | 1991-03-15 | 1991-03-15 | electrophotographic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2245791U JPH04112272U (en) | 1991-03-15 | 1991-03-15 | electrophotographic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04112272U true JPH04112272U (en) | 1992-09-30 |
Family
ID=31907953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2245791U Pending JPH04112272U (en) | 1991-03-15 | 1991-03-15 | electrophotographic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04112272U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627754A (en) * | 1992-07-13 | 1994-02-04 | Mita Ind Co Ltd | Unit fixing structure of image forming device |
| JP2006113275A (en) * | 2004-10-14 | 2006-04-27 | Oki Data Corp | Image forming apparatus |
| JP2012093700A (en) * | 2010-09-30 | 2012-05-17 | Brother Ind Ltd | Image forming apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61262773A (en) * | 1985-05-17 | 1986-11-20 | Katsuragawa Denki Kk | Electrophotographic device |
| JPH01185686A (en) * | 1988-01-20 | 1989-07-25 | Canon Inc | Image forming device |
| JPH0235314A (en) * | 1988-07-25 | 1990-02-05 | Yaskawa Electric Mfg Co Ltd | Absolute value encoder |
-
1991
- 1991-03-15 JP JP2245791U patent/JPH04112272U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61262773A (en) * | 1985-05-17 | 1986-11-20 | Katsuragawa Denki Kk | Electrophotographic device |
| JPH01185686A (en) * | 1988-01-20 | 1989-07-25 | Canon Inc | Image forming device |
| JPH0235314A (en) * | 1988-07-25 | 1990-02-05 | Yaskawa Electric Mfg Co Ltd | Absolute value encoder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627754A (en) * | 1992-07-13 | 1994-02-04 | Mita Ind Co Ltd | Unit fixing structure of image forming device |
| JP2006113275A (en) * | 2004-10-14 | 2006-04-27 | Oki Data Corp | Image forming apparatus |
| JP4536477B2 (en) * | 2004-10-14 | 2010-09-01 | 株式会社沖データ | Image forming apparatus |
| JP2012093700A (en) * | 2010-09-30 | 2012-05-17 | Brother Ind Ltd | Image forming apparatus |
| US8509654B2 (en) | 2010-09-30 | 2013-08-13 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having mechanism for placing fixing unit in nip relaxed state |
| US8693918B2 (en) | 2010-09-30 | 2014-04-08 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having mechanism for placing fixing unit in nip relaxed state |
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