JP2018045162A - Exterior detachment configuration, exterior attachment configuration, and image forming apparatus - Google Patents

Exterior detachment configuration, exterior attachment configuration, and image forming apparatus Download PDF

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JP2018045162A
JP2018045162A JP2016181234A JP2016181234A JP2018045162A JP 2018045162 A JP2018045162 A JP 2018045162A JP 2016181234 A JP2016181234 A JP 2016181234A JP 2016181234 A JP2016181234 A JP 2016181234A JP 2018045162 A JP2018045162 A JP 2018045162A
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engagement
exterior
engagement portion
rear cover
engaging
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JP6883398B2 (en
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浩輝 篠田
Hiroki Shinoda
浩輝 篠田
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Canon Finetech Nisca Inc
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Canon Finetech Nisca Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a configuration that causes a plurality of exteriors to be engaged with each other, the configuration capable of attaching the exteriors to each other or detaching the exteriors from each other regardless of the order to attach or detach the exteriors.SOLUTION: A back cover 201 and a left back cover 203 are removably attached to an apparatus body. The back cover 201 is provided with an engaging pin 220 that can detach the back cover 201 from the left back cover 203 to which the back cover 201 is locked by the back cover 201 moving in a first direction (X direction). The left back cover 203 is provided with an engaging plate part 230 that can detach the left back cover 203 from the back cover 201 to which the left back cover 203 is locked by the left back cover 203 moving in a second direction different from the first direction (Y direction).SELECTED DRAWING: Figure 6

Description

本発明は、装置本体に対して着脱可能な外装取外し構成及び外装装着構成、並びに、このような外装取外し構成及び外装装着構成を有する複写機、プリンタ、ファクシミリ、これらの複数の機能を有する複合機などの画像形成装置に関する。   The present invention relates to an exterior detachment configuration and an exterior mounting configuration that can be attached to and detached from the apparatus main body, and a copying machine, a printer, a facsimile, and a multi-function machine having a plurality of these functions, having such an exterior detachment configuration and an exterior mounting configuration. The present invention relates to an image forming apparatus.

装置の定期的なメンテナンスや、突発的な部品交換が想定される製品は、外装を何度か着脱することが想定されるため、その外装には着脱性が求められる。このため、外装を本体フレーム(装置本体)に係合爪により係合自在として、外装を本体フレームに対して着脱する構成が提案されている(例えば、特許文献1)。   Products that are expected to be regularly maintained and suddenly replaced are expected to be attached and detached several times. For this reason, the structure which attaches | detaches and attaches an exterior with respect to a main body frame so that an exterior can be engaged with a main body frame (apparatus main body) with an engaging claw is proposed (for example, patent document 1).

特開2009−169126号公報JP 2009-169126 A

しかし、外装は機能面や部品の製作効率の面から複数の外装に分割されており、メンテナンス時などには必要な外装のみを最小工数で着脱できることが望ましい。さらにその場合、外装は装置の外観になるため、見た目の品位も重要であり、装着状態の外装の合わせに段差ができることは好ましくない。   However, the exterior is divided into a plurality of exteriors from the viewpoint of functional efficiency and component production efficiency, and it is desirable that only necessary exteriors can be attached and detached with minimum man-hours during maintenance. Furthermore, in that case, since the exterior becomes the appearance of the device, the appearance quality is also important, and it is not preferable that there is a step in matching the mounted exterior.

ここで、それぞれの外装を装置本体に対して係合爪により係合させる構成の場合、個々の外装の位置決めを行う複数の部品のばらつきなどにより、外装同士の間に段差ができて、外観の品位が低下する場合がある。   Here, in the case of the configuration in which the respective exteriors are engaged with the apparatus main body by the engaging claws, there is a step between the exteriors due to variations of a plurality of parts for positioning the individual exteriors. The quality may be reduced.

したがって、外装同士を係合させて互いの位置決めを行うことが好ましいが、この場合、係合部の構成によっては、2つの外装の装置本体への着脱順序が決まってしまう場合がある。即ち、一方の外装を装置本体に装着してから他方の外装を一方の外装に係合させつつ装置本体に装着しなければならない場合や、他方の外装を一方の外装との係合を外しつつ装置本体から取り外してから一方の外装を取り外すことが必要になる場合がある。このように着脱順序が決まってしまうと、例えば、それぞれの外装を装着する際に順序を守らなければならなかったり、一方の外装のみを取り外したい場合でも先に他方の外装を取り外す必要があり、作業性が良くない。   Therefore, it is preferable that the exteriors are engaged with each other for positioning, but in this case, depending on the configuration of the engaging portion, the order of attaching and detaching the two exteriors to the apparatus body may be determined. In other words, when one exterior must be attached to the apparatus body and then the other exterior must be attached to the apparatus body while engaging the other exterior, or the other exterior is disengaged from the one exterior. It may be necessary to remove one of the exteriors after removing it from the device body. When the order of attachment and detachment is determined in this way, for example, when installing each exterior, it is necessary to follow the order, or even if you want to remove only one exterior, it is necessary to remove the other exterior first, Workability is not good.

本発明は、複数の外装同士を係合させる構成で、外装の着脱順序に拘らずそれぞれの外装を装着または取外すことが可能な構成を提供することを目的とする。   An object of the present invention is to provide a configuration in which a plurality of exteriors can be engaged with each other, and the respective exteriors can be mounted or removed regardless of the order in which the exteriors are attached or detached.

本発明は、装置本体に対して着脱可能な第1外装及び第2外装と、前記第1外装に設けられ、前記第1外装が第1方向へ移動することで前記第2外装に係止された状態から前記第1外装を取外し可能な第1係合部と、前記第2外装に設けられ、前記第2外装が前記第1方向とは異なる第2方向に移動することで前記第1外装に係止された状態から前記第2外装を取外し可能な第2係合部と、を有することを特徴とする外装取外し構成にある。   The present invention includes a first exterior and a second exterior that can be attached to and detached from the apparatus main body, and the first exterior, and the first exterior is locked to the second exterior by moving in the first direction. The first exterior part is provided on the second exterior, and the second exterior is moved in a second direction different from the first direction. And a second engagement portion that can be removed from the second exterior from the state of being locked to the exterior.

また、本発明は、装置本体に対して着脱可能な第1外装及び第2外装と、前記第1外装に設けられ、前記第1外装が第3方向へ移動することによって前記第2外装に係止され、前記第1外装を装着可能な第1係合部と、前記第2外装に設けられ、前記第2外装が前記第3方向と異なる第4方向へ移動することによって前記第1外装に係止され、前記第2外装を装着可能な第2係合部と、を有することを特徴とする外装装着構成にある。   The present invention also provides a first exterior and a second exterior that can be attached to and detached from the apparatus main body, and the first exterior, and the first exterior moves in a third direction so as to relate to the second exterior. A first engaging portion that is stopped and attachable to the first exterior; and provided in the second exterior, and the second exterior moves to a fourth direction different from the third direction, thereby moving the first exterior to the first exterior. And a second engaging portion that is locked and can mount the second exterior.

本発明によれば、複数の外装同士を係合させる構成で、外装の着脱順序に拘らずそれぞれの外装を装着または取外すことが可能な構成を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the structure which can mount | wear with or remove each exterior can be provided by the structure which engages several exteriors, irrespective of the attachment or detachment order of an exterior.

第1の実施形態に係る画像形成装置の概略構成断面図。1 is a schematic sectional view of an image forming apparatus according to a first embodiment. 第1の実施形態に係る画像形成装置の背面斜視図。1 is a rear perspective view of an image forming apparatus according to a first embodiment. 第1の実施形態に係る画像形成装置の(a)後カバーの、(b)右後カバーの、(c)左後カバーの、それぞれ係合方向を示す背面分解斜視図。FIG. 4 is an exploded rear perspective view illustrating the engagement directions of (a) the rear cover, (b) the right rear cover, and (c) the left rear cover of the image forming apparatus according to the first embodiment. 比較例に係る係合構成の係合状態を示す斜視図。The perspective view which shows the engagement state of the engagement structure which concerns on a comparative example. 比較例に係る係合構成に関し、(a)係合可能な方向を、(b)係合不能な方向を、それぞれ示す斜視図。The perspective view which shows (a) the direction which can be engaged and (b) the direction which cannot be engaged, respectively about the engagement structure which concerns on a comparative example. 第1の実施形態に係る係合構成の係合状態を示す斜視図。The perspective view which shows the engagement state of the engagement structure which concerns on 1st Embodiment. 図6の係合構成を拡大して示す斜視図。The perspective view which expands and shows the engagement structure of FIG. 第1の実施形態に係る係合構成の分解斜視図。The disassembled perspective view of the engagement structure which concerns on 1st Embodiment. 第1の実施形態に係る係合構成の側面図。The side view of the engagement structure which concerns on 1st Embodiment. 第1の実施形態に係る係合構成の、(a)第1方向の係合方向を、(b)第2方向の係合方向を、それぞれ示す斜視図。The perspective view which shows the engagement direction of the 1st direction of the engagement structure which concerns on 1st Embodiment, respectively, (b) The engagement direction of a 2nd direction is each shown. 第2の実施形態に係る後カバー、右後カバー、左後カバーの分解斜視図。The disassembled perspective view of the rear cover which concerns on 2nd Embodiment, a right rear cover, and a left rear cover. 第2の実施形態に係る後カバーの斜視図。The perspective view of the rear cover which concerns on 2nd Embodiment. 第2の実施形態に係る、(a)左後カバーの、(b)右後カバーの斜視図。The perspective view of (a) left rear cover and (b) right rear cover according to the second embodiment. (a)カバーを着脱する際の問題点を説明するための図、(b)(a)の係合構成の状態を示す図。(A) The figure for demonstrating the problem at the time of attaching / detaching a cover, (b) The figure which shows the state of the engagement structure of (a). 第2の実施形態に係る第1係合構成の(a)係合状態の断面図、(b)係合前の断面図、(c)係合状態の斜視図。(A) Sectional drawing of engagement state of 1st engagement structure which concerns on 2nd Embodiment, (b) Cross-sectional view before engagement, (c) Perspective view of engagement state. (a)図13(a)のA部拡大図、(b)図13(b)のB部拡大図、(c)第3係合部の断面図。FIG. 13A is an enlarged view of a portion A in FIG. 13A, FIG. 13B is an enlarged view of a portion B in FIG. 13B, and FIG. (a)図12のC部拡大図、(b)図12のD部拡大図。(A) C section enlarged view of FIG. 12, (b) D section enlarged view of FIG. 第2の実施形態に係る第2係合構成に関し、(a)後カバーと右後カバーの第2係合構成の斜視図、(b)後カバーと左後カバーの第2係合構成の斜視図、(c)(a)のE−E断面図。Regarding the second engagement configuration according to the second embodiment, (a) a perspective view of the second engagement configuration of the rear cover and the right rear cover, (b) a perspective view of the second engagement configuration of the rear cover and the left rear cover. EE sectional drawing of a figure and (c) (a). 後カバー、右後カバー、左後カバーを係合させた状態を示す斜視図。The perspective view which shows the state which engaged the rear cover, the right rear cover, and the left rear cover.

<第1の実施形態>
第1の実施形態について、図1ないし図10を用いて説明する。まず、本実施形態の画像形成装置の概略構成について、図1を用いて説明する。
<First Embodiment>
A first embodiment will be described with reference to FIGS. First, a schematic configuration of the image forming apparatus of the present embodiment will be described with reference to FIG.

[画像形成装置]
本実施形態の画像形成装置100は、装置本体110と、装置本体110の上部に装着された原稿読み取りユニット(画像読取装置)120と、装置本体110に対して着脱可能な外装構成200(図2、3など参照)を備える。このような画像形成装置100は、例えば外部のコンピュータなどの外部端末から送られてくる画像情報や、原稿読み取りユニット120で取り込んだ画像情報に基づいて、用紙などのシートに画像形成を行う。
[Image forming apparatus]
The image forming apparatus 100 according to the present embodiment includes an apparatus main body 110, a document reading unit (image reading apparatus) 120 mounted on the upper part of the apparatus main body 110, and an exterior configuration 200 that can be attached to and detached from the apparatus main body 110 (FIG. 2). 3). Such an image forming apparatus 100 forms an image on a sheet such as a sheet based on image information sent from an external terminal such as an external computer or image information captured by the document reading unit 120.

このために装置本体110の筐体内(装置本体内)には、シートに画像を形成する画像形成部10と、シート給送部20と、定着部30と、シート排出部40が設けられている。画像形成部10は、回転駆動される感光ドラム11と、帯電ローラ12と、露光装置13と、現像装置14と、転写ローラ15と、クリーニング装置16とを有する。回転する感光ドラム11の表面は、帯電ローラ12により均一に帯電され、帯電された表面には、上述の画像情報に基づいて露光装置13により露光されることで、静電潜像が形成される。   For this purpose, an image forming unit 10 that forms an image on a sheet, a sheet feeding unit 20, a fixing unit 30, and a sheet discharge unit 40 are provided in the housing of the apparatus main body 110 (inside the apparatus main body). . The image forming unit 10 includes a rotationally driven photosensitive drum 11, a charging roller 12, an exposure device 13, a developing device 14, a transfer roller 15, and a cleaning device 16. The surface of the rotating photosensitive drum 11 is uniformly charged by the charging roller 12, and the charged surface is exposed by the exposure device 13 based on the above-described image information, whereby an electrostatic latent image is formed. .

具体的には、画像情報は、露光装置(レーザー発光書込ユニット)13により光変調情報に変換され射出される。露光装置13から射出された光変調情報は、感光ドラム11の回転軸線方向(主走査方向)に走査されながら、感光ドラム11上にスポット状に結像される。回転されることによって副走査方向に移動される感光ドラム11上に照射された光スポットは、主走査方向に往復走査され、それによって感光ドラム11上に、上述した画像情報に対応した静電潜像が形成される。   Specifically, the image information is converted into light modulation information by an exposure device (laser emission writing unit) 13 and emitted. The light modulation information emitted from the exposure device 13 is imaged in a spot shape on the photosensitive drum 11 while being scanned in the rotation axis direction (main scanning direction) of the photosensitive drum 11. The light spot irradiated on the photosensitive drum 11 that is moved in the sub-scanning direction by being rotated is reciprocated in the main scanning direction, whereby the electrostatic latent image corresponding to the image information described above is formed on the photosensitive drum 11. An image is formed.

そして、感光ドラム11上の静電潜像に対して、現像装置14から現像剤(トナー)が供給されることによって、静電潜像がトナー像として可視化される。なお、現像装置14にはトナーボトルユニット17から現像剤が補給される。   Then, the developer (toner) is supplied from the developing device 14 to the electrostatic latent image on the photosensitive drum 11, whereby the electrostatic latent image is visualized as a toner image. Note that developer is supplied to the developing device 14 from the toner bottle unit 17.

次いで、感光ドラム11上に形成されたトナー像は、感光ドラム11と転写ローラ15との間の転写ニップ部に搬送されたシートに転写される。具体的には、感光ドラム11の回転方向に関して現像装置14の下流側には、感光ドラム11の表面に接触するように転写ローラ15が配置され、感光ドラム11と転写ローラ15との間で転写ニップ部を形成している。転写ローラ15には転写バイアスが印加され、その転写バイアスによって、感光ドラム11に形成されたトナー像が転写ニップ部でシート上に静電的に転写されるようになっている。転写後に感光ドラム11に残ったトナーなどは、クリーニング装置16により除去される。   Next, the toner image formed on the photosensitive drum 11 is transferred to a sheet conveyed to a transfer nip portion between the photosensitive drum 11 and the transfer roller 15. Specifically, a transfer roller 15 is disposed on the downstream side of the developing device 14 with respect to the rotation direction of the photosensitive drum 11 so as to be in contact with the surface of the photosensitive drum 11, and transfer is performed between the photosensitive drum 11 and the transfer roller 15. A nip is formed. A transfer bias is applied to the transfer roller 15, and the toner image formed on the photosensitive drum 11 is electrostatically transferred onto the sheet at the transfer nip portion by the transfer bias. The toner remaining on the photosensitive drum 11 after the transfer is removed by the cleaning device 16.

一方、シート給送部20は、転写ニップ部にシートを搬送する。シート給送部20は、カセット21、給送ローラ22、搬送ガイド23、レジストレーションローラ対24などを備える。カセット21は、装置本体110の下部に配置され、規定のサイズに裁断された用紙などのシートを積層して収容可能に箱状に形成されている。カセット21は、装置本体110に対して紙面垂直方向に着脱自在となるように装着されている。また、カセット21には、支持板21aが配されており、支持板21aは、加圧バネ21bにより上方に向かって付勢されている。これにより、カセット21内に積層されたシート束の最下面が支持板21aに支持されると共に、加圧バネ21bの付勢力により上方に持ち上げられた状態で保持される。   On the other hand, the sheet feeding unit 20 conveys the sheet to the transfer nip portion. The sheet feeding unit 20 includes a cassette 21, a feeding roller 22, a conveyance guide 23, a registration roller pair 24, and the like. The cassette 21 is disposed in the lower part of the apparatus main body 110 and is formed in a box shape so that sheets such as sheets cut to a predetermined size can be stacked and accommodated. The cassette 21 is attached to the apparatus main body 110 so as to be detachable in the direction perpendicular to the paper surface. The cassette 21 is provided with a support plate 21a, and the support plate 21a is urged upward by a pressure spring 21b. Accordingly, the lowermost surface of the sheet bundle stacked in the cassette 21 is supported by the support plate 21a and is held in a state where it is lifted upward by the urging force of the pressure spring 21b.

このように持ち上げられたシート束の最上面のシートが、給送ローラ22により給送され、搬送ガイド23に案内されてレジストレーションローラ対24のニップ部に到達する。そして、感光ドラム11上のトナー像が転写ニップ部に到達するタイミングに合わせて、レジストレーションローラ対24からシートが転写ニップ部に搬送される。   The uppermost sheet of the sheet bundle thus lifted is fed by the feeding roller 22 and guided by the conveyance guide 23 to reach the nip portion of the registration roller pair 24. Then, the sheet is conveyed from the registration roller pair 24 to the transfer nip portion at the timing when the toner image on the photosensitive drum 11 reaches the transfer nip portion.

転写ニップ部でトナー像が転写されたシートは、転写ニップの上方に配置された定着部30に向かって搬送される。定着部30は、加熱手段としての定着フィルム31が環状をなすように配置されていると共に、その定着フィルム31に対面する対向手段として加圧ローラ32が配置されている。そして、定着フィルム31及び加圧ローラ32の定着ニップ部における加圧・加熱作用に基づく定着作用によって、シート上のトナーが融解され、シート上にトナー像が定着される。   The sheet on which the toner image is transferred at the transfer nip portion is conveyed toward the fixing portion 30 disposed above the transfer nip. The fixing unit 30 has a fixing film 31 as a heating unit arranged in an annular shape, and a pressure roller 32 as an opposing unit facing the fixing film 31. The toner on the sheet is melted and the toner image is fixed on the sheet by the fixing action based on the pressure and heating action in the fixing nip portion of the fixing film 31 and the pressure roller 32.

トナー像が定着されたシートは、定着部30の出口部から装置上方側に配置されたシート排出部40に搬送される。シート排出部40に搬送されたシートは、排出ローラ41により排出トレイ42に排出される。両面印刷を行う場合には、排出ローラ41によりシートをスイッチバックして両面搬送路43に搬送し、表面と同様にシートの裏面に画像を形成する。また、シート排出部40の上方に上側シート排出部44が配置されており、排出トレイ42の上に別途、積載ユニットなどを装着した場合には、上側シート排出部44からシートを排出可能である。   The sheet on which the toner image is fixed is conveyed from the exit of the fixing unit 30 to the sheet discharge unit 40 disposed on the upper side of the apparatus. The sheet conveyed to the sheet discharge unit 40 is discharged to a discharge tray 42 by a discharge roller 41. When performing duplex printing, the sheet is switched back by the discharge roller 41 and conveyed to the duplex conveyance path 43, and an image is formed on the back surface of the sheet in the same manner as the front surface. Further, an upper sheet discharge section 44 is disposed above the sheet discharge section 40, and when a stacking unit or the like is separately mounted on the discharge tray 42, sheets can be discharged from the upper sheet discharge section 44. .

[外装構成]
ここで、画像形成装置100の外装は、内部の各種装置を覆うと共に、各部分の機能に合わせて適宜分割された複数のカバーにより構成されている。例えば、外装は、開閉動作を行う部分、組み立て時に分割される部分などの機能に合わせて構成されている。
[Exterior configuration]
Here, the exterior of the image forming apparatus 100 is configured by a plurality of covers that are appropriately divided in accordance with the functions of the respective parts, while covering various internal devices. For example, the exterior is configured in accordance with functions such as a part that performs an opening / closing operation and a part that is divided during assembly.

本実施形態では、このよう画像形成装置100の外装のうち、図2及び図3に示すように、後カバー201、右後カバー202、左後カバー203により、外装取外し構成又は外装装着構成としての外装構成200を構成している。これら後カバー201、右後カバー202、左後カバー203は、装置本体110に対して着脱可能である。また、後カバー201と右後カバー202、及び、後カバー201と左後カバー203は、それぞれ互いに係合可能となっている。これにより互いの位置決めを行って、互いの部材同士の合わせに段差をできにくくできる。   In the present embodiment, as shown in FIGS. 2 and 3, among the exteriors of the image forming apparatus 100, the rear cover 201, the right rear cover 202, and the left rear cover 203 are used as an exterior removal configuration or an exterior mounting configuration. An exterior configuration 200 is configured. The rear cover 201, the right rear cover 202, and the left rear cover 203 are detachable from the apparatus main body 110. Further, the rear cover 201 and the right rear cover 202, and the rear cover 201 and the left rear cover 203 can be engaged with each other. Thereby, mutual positioning can be performed, and it can be made difficult to make a level | step difference in the alignment of mutual members.

また、図3(a)に示すように、後カバー201は、装置本体110に対して矢印αで示す第1方向及び第3方向に着脱可能である。これに対して、図3(b)、(c)に示すように、右後カバー202及び左後カバー203は、装置本体110に対して、後カバー201の着脱方向である第1方向と異なる第2方向及び第3方向と異なる第4方向(矢印βで示す方向)に着脱可能である。   3A, the rear cover 201 can be attached to and detached from the apparatus main body 110 in the first direction and the third direction indicated by the arrow α. On the other hand, as shown in FIGS. 3B and 3C, the right rear cover 202 and the left rear cover 203 are different from the apparatus body 110 in the first direction, which is the attaching / detaching direction of the rear cover 201. It can be attached and detached in a fourth direction (direction indicated by arrow β) different from the second direction and the third direction.

したがって、本実施形態では、後カバー201と右後カバー202、及び、後カバー201と左後カバー203は、それぞれ第1方向及び第2方向に取り外し可能、及び、第3方向及び第4方向に装着可能としている。そして、後カバー201と右後カバー202、及び、後カバー201と左後カバー203は、それぞれ互いに係合した状態で互いの位置が規制され、それぞれの表面同士の合わせが整合されるようになっている。なお、右後カバー202及び左後カバー203は、後カバー201の両側に装着されるものであるため、本実施形態の場合、第1方向と第2方向、及び、第3方向と第4方向は、互いに直交する方向である。   Therefore, in this embodiment, the rear cover 201 and the right rear cover 202, and the rear cover 201 and the left rear cover 203 are removable in the first direction and the second direction, respectively, and in the third direction and the fourth direction, respectively. It can be installed. The positions of the rear cover 201 and the right rear cover 202, and the rear cover 201 and the left rear cover 203 are regulated while being engaged with each other, and the alignment of the respective surfaces is aligned. ing. Since the right rear cover 202 and the left rear cover 203 are mounted on both sides of the rear cover 201, in the present embodiment, the first direction and the second direction, and the third direction and the fourth direction. Are directions orthogonal to each other.

[比較例]
上述のように、外装(カバー)同士に係合をもたせて外装表面の合わせを整合しようとすると、複数の方向に規制する必要が発生するため、係合部の構成(係合構成)によっては着脱性が低下する。例えば、比較例として図4及び図5に示すような係合構成を考える。図4に示すように、カバー401は、カバー402と係合構成403によって、X方向、Y方向及びZ方向の位置が規制されるように係合されている。
[Comparative example]
As described above, it is necessary to regulate the alignment of the exterior surfaces by bringing the exteriors (covers) into engagement with each other. Therefore, depending on the configuration of the engaging portion (engaging configuration) Detachability is reduced. For example, consider an engagement configuration as shown in FIGS. 4 and 5 as a comparative example. As shown in FIG. 4, the cover 401 is engaged by the cover 402 and the engagement configuration 403 so that the positions in the X direction, the Y direction, and the Z direction are regulated.

係合構成403は、スナップ411、凸部412、当接部421、挿し込み孔422とから構成される。スナップ411は、カバー401からX方向に突出するように形成され、先端に引っ掛け部411aが形成されている。凸部412もカバー401からX方向に突出するように形成されている。当接部421は、カバー402に形成され、スナップ411の引っ掛け部411aが当接する。挿し込み孔422もカバー402に形成され、凸部412が進入可能である。   The engagement configuration 403 includes a snap 411, a convex portion 412, a contact portion 421, and an insertion hole 422. The snap 411 is formed so as to protrude from the cover 401 in the X direction, and a hook portion 411a is formed at the tip. The convex portion 412 is also formed so as to protrude from the cover 401 in the X direction. The abutting portion 421 is formed on the cover 402, and the hooking portion 411a of the snap 411 is abutted thereon. The insertion hole 422 is also formed in the cover 402, and the convex portion 412 can enter.

図5(a)に示すように、X方向にカバー401とカバー402とを係合させようとする場合、まず、凸部412が挿し込み孔422に挿し込まれる。同時に、スナップ411の先端が当接部421に当接し、撓みながら挿し込みが進む。スナップ411が当接部421を乗り越えたところでスナップ411の撓みが元に戻り、引っ掛け部411aが当接部421に引っ掛かって、図4に示す状態になる。この結果、引っ掛け部411aと当接部421との係合、及び、凸部412と挿し込み孔422との係合により、カバー401とカバー402とのX方向、Y方向及びZ方向の位置が規制される。   As shown in FIG. 5A, when the cover 401 and the cover 402 are to be engaged in the X direction, first, the convex portion 412 is inserted into the insertion hole 422. At the same time, the tip of the snap 411 comes into contact with the contact portion 421, and insertion proceeds while bending. When the snap 411 gets over the contact portion 421, the snap 411 is returned to its original state, and the hook portion 411a is hooked on the contact portion 421, resulting in the state shown in FIG. As a result, the positions of the cover 401 and the cover 402 in the X direction, the Y direction, and the Z direction are changed by the engagement between the hook portion 411a and the contact portion 421 and the engagement between the convex portion 412 and the insertion hole 422. Be regulated.

このような比較例の係合構成403の場合、カバー401とカバー402との係合は、図5(a)に示すようにX方向に可能であるが、図5(b)に示すY方向には不能である。即ち、カバー401をカバー402に対してY方向に係合させようとすると、凸部412が挿し込み孔422の周囲部分423と干渉し、凸部412を挿し込み孔422に係合させることはできない。   In the case of such an engagement configuration 403 of the comparative example, the engagement between the cover 401 and the cover 402 is possible in the X direction as shown in FIG. 5A, but the Y direction shown in FIG. 5B. It is impossible. That is, when the cover 401 is engaged with the cover 402 in the Y direction, the convex portion 412 interferes with the peripheral portion 423 of the insertion hole 422, and the convex portion 412 is engaged with the insertion hole 422. Can not.

したがって、比較例の場合、カバー401とカバー402を装置本体に装着する際には、まず、カバー402を装置本体に装着した後に、カバー401をX方向にカバー402と係合させつつ装置本体に装着する必要がある。一方、カバー401とカバー402を装置本体から取り外す際には、まず、カバー401をX方向に移動させてカバー402との係合を外しつつ装置本体から取り外してから、カバー402を装置本体から取り外す必要がある。このように比較例の場合には、装置本体に対するカバー401、402の着脱順序が決まってしまい、例えば、カバー402のみを取り外したい場合でも先にカバー401を取り外す必要があり、作業性が良くない。   Therefore, in the case of the comparative example, when the cover 401 and the cover 402 are attached to the apparatus main body, the cover 402 is first attached to the apparatus main body, and then the cover 401 is engaged with the cover 402 in the X direction. It is necessary to install. On the other hand, when removing the cover 401 and the cover 402 from the apparatus main body, first, the cover 401 is moved in the X direction to disengage the cover 402 from the apparatus main body, and then the cover 402 is removed from the apparatus main body. There is a need. As described above, in the comparative example, the order in which the covers 401 and 402 are attached to and detached from the apparatus main body is determined. For example, even when only the cover 402 is desired to be removed, it is necessary to remove the cover 401 first. .

このような着脱性の問題を改善するために、周囲部分423を切り欠くことも考えられるが、その場合、Y方向の規制が無くなるため、外力が加わるとスナップ411の引っ掛け部411aが当接部421から脱落し、係合が外れてしまう。このように比較例の構成の場合、複数の方向に規制するための係合構成が、カバー401、402の着脱順序によっては着脱動作を阻害してしまい、着脱の作業性が良くない。   In order to improve such a detachability problem, it is conceivable that the peripheral portion 423 is notched, but in that case, there is no restriction in the Y direction, so that when the external force is applied, the hook portion 411a of the snap 411 is brought into contact with the contact portion. Detaches from 421 and disengages. Thus, in the case of the configuration of the comparative example, the engagement configuration for restricting in a plurality of directions obstructs the attaching / detaching operation depending on the attaching / detaching order of the covers 401 and 402, and the attaching / detaching workability is not good.

[本実施形態の係合構成]
そこで、本実施形態では、以下のような構成により、複数のカバー(外装)同士を係合させる構成で、カバーの着脱順序に拘らずカバー同士の取り外し及びカバー同士の装着を可能としている。即ち、2つのカバーのどちらから装置本体に取り付けてもカバー同士の係合が成り立ち、装置本体から取り外す場合も2つのカバーのどちらからでも取り外せるようにしている。このためには、係合を保持するための構成を、2つの方向からの組立にそれぞれ対応して撓むようにし、係合が完了した後は取り外し方向の外力に対して適度な保持力を持つ構成にする。
[Engagement configuration of this embodiment]
Therefore, in the present embodiment, the following configuration allows the plurality of covers (exteriors) to be engaged with each other so that the covers can be removed and the covers can be attached regardless of the order of attaching and detaching the covers. That is, the cover can be engaged with each other regardless of which of the two covers is attached to the apparatus main body, and can be removed from either of the two covers even when the cover is removed from the apparatus main body. For this purpose, the structure for holding the engagement is bent corresponding to the assembly from the two directions, and after the engagement is completed, the holding force is appropriate for the external force in the removal direction. Make the configuration.

このような本実施形態の係合構成210について、図6ないし図10を用いて具体的に説明する。なお、後カバー201と右後カバー202、及び、後カバー201と左後カバー203の係合構成210は同じであるため、以下、後カバー201と左後カバー203の係合構成210について説明する。   The engagement configuration 210 of this embodiment will be specifically described with reference to FIGS. 6 to 10. Since the engagement configuration 210 of the rear cover 201 and the right rear cover 202 and the rear cover 201 and the left rear cover 203 are the same, the engagement configuration 210 of the rear cover 201 and the left rear cover 203 will be described below. .

第1外装としての後カバー201には、第1係合部としての係合ピン220が設けられている。一方、第2外装としての左後カバー203には、第2係合部としての係合板部230が設けられている。係合ピン220及び係合板部230は、少なくとも一方が弾性変形することで、係合ピン220が係合板部230に対して第1方向及び第1方向と異なる第2方向に係合及び係合解除すること可能に構成されている。即ち、係合ピン220は、後カバー201が第1方向へ移動することで左後カバー203に係止された状態から後カバー201を取り外し可能であり、後カバー201が第3方向へ移動することによって左後カバー203に係止され、後カバー201を装着可能である。また、係合板部230は、左後カバー203が第1方向とは異なる第2方向に移動することで後カバー201に係止された状態から左後カバー203を取外し可能であり、左後カバー203が第3方向と異なる第4方向へ移動することによって後カバー201に係止され、左後カバー203を装着可能である。本実施形態では、第1方向及び第3方向がX方向、第2方向及び第4方向がY方向である。したがって、第1方向と第2方向、第3方向と第4方向は、それぞれ互いに直交する方向である。図6及び図7に示すように、係合ピン220と係合板部230とが係合することで、後カバー201と左後カバー203とは、X方向、Y方向及びZ方向の位置が互いに規制される。   The rear cover 201 as the first exterior is provided with an engagement pin 220 as a first engagement portion. On the other hand, the left rear cover 203 as the second exterior is provided with an engagement plate portion 230 as a second engagement portion. At least one of the engagement pin 220 and the engagement plate portion 230 is elastically deformed, so that the engagement pin 220 is engaged and engaged with the engagement plate portion 230 in the first direction and the second direction different from the first direction. It is configured to be able to be released. That is, the engagement pin 220 can be removed from the state where the rear cover 201 is locked to the left rear cover 203 by moving the rear cover 201 in the first direction, and the rear cover 201 moves in the third direction. Accordingly, the rear cover 201 can be mounted by being locked to the left rear cover 203. Further, the engagement plate portion 230 can remove the left rear cover 203 from a state in which the left rear cover 203 is locked to the rear cover 201 by moving in the second direction different from the first direction. By moving 203 in a fourth direction different from the third direction, the rear cover 201 is locked and the left rear cover 203 can be attached. In the present embodiment, the first direction and the third direction are the X direction, and the second direction and the fourth direction are the Y direction. Therefore, the first direction and the second direction, and the third direction and the fourth direction are directions orthogonal to each other. As shown in FIGS. 6 and 7, the engagement pin 220 and the engagement plate portion 230 are engaged, whereby the rear cover 201 and the left rear cover 203 are positioned in the X direction, the Y direction, and the Z direction with respect to each other. Be regulated.

図8に示すように、係合ピン220(突出部)は、後カバー201からX方向に突出するように後カバー201と一体に形成されている。このような係合ピン220は、自由状態で略円柱状に形成されており、X方向に沿ってスリット221が形成されている。即ち、係合ピン220は、上半部220aと下半部220bとで構成され、上半部220aと下半部220bとの間にスリット221を有する。したがって、係合ピン220は、このスリット221の間隔が変化する方向(Z方向)、即ち、上半部220aと下半部220bとが近づく方向に弾性変形可能である。また、係合ピン220は、後カバー201と同じ樹脂製で、後カバー201の成型時に形成される。   As shown in FIG. 8, the engagement pin 220 (protruding portion) is formed integrally with the rear cover 201 so as to protrude from the rear cover 201 in the X direction. Such an engagement pin 220 is formed in a substantially cylindrical shape in a free state, and a slit 221 is formed along the X direction. That is, the engagement pin 220 is configured by an upper half 220a and a lower half 220b, and has a slit 221 between the upper half 220a and the lower half 220b. Therefore, the engagement pin 220 can be elastically deformed in the direction in which the interval between the slits 221 changes (Z direction), that is, the direction in which the upper half 220a and the lower half 220b approach each other. Further, the engagement pin 220 is made of the same resin as the rear cover 201 and is formed when the rear cover 201 is molded.

なお、係合ピン220が弾性変形する方向は、係合ピン220を後述する係合板部230の係合孔231にX方向に係合させることだけを考えれば、Z方向でなくても例えばY方向であっても良い。但し、本実施形態では、係合ピン220を係合孔231に対してY方向にも係合させるため、仮に係合ピン220が弾性変形する方向をY方向とした場合、係合ピン220がY方向に弾性変形しても係合孔231のY方向に開放した切り欠き232を通過しにくい。したがって、係合ピン220が弾性変形する方向は、Z方向とすることが好ましい。即ち、係合ピン220が弾性変形する方向は、第1方向(第3方向)及び第2方向(第4方向)にそれぞれ直交する方向とすることが好ましい。   Note that the direction in which the engagement pin 220 is elastically deformed is not limited to the Z direction, for example, if the engagement pin 220 is only engaged in the X direction with an engagement hole 231 of the engagement plate portion 230 described later, for example, Y It may be a direction. However, in this embodiment, since the engagement pin 220 is also engaged with the engagement hole 231 in the Y direction, if the direction in which the engagement pin 220 is elastically deformed is the Y direction, the engagement pin 220 is Even if elastically deformed in the Y direction, it is difficult to pass through the notch 232 opened in the Y direction of the engagement hole 231. Therefore, the direction in which the engagement pin 220 is elastically deformed is preferably the Z direction. That is, the direction in which the engagement pin 220 is elastically deformed is preferably a direction orthogonal to the first direction (third direction) and the second direction (fourth direction).

一方、係合板部230は、左後カバー203からY方向に突出するように形成された板状部材で、X方向に貫通した係合孔231と、係合孔231の周囲の一部を切り欠いた切り欠き232とが形成されている。係合板部230は、左後カバー203と同じ樹脂製で、左後カバー203の成型時に形成される。係合孔231は、係合ピン220と係合板部230の少なくとも一方が弾性変形することで係合ピン220がX方向(第1方向及び第3方向)に進入及び離脱が可能である。即ち、係合孔231は、係合ピン220が第3方向に進入可能で、且つ、第1方向に離脱可能に形成されている。   On the other hand, the engagement plate portion 230 is a plate-like member formed so as to protrude from the left rear cover 203 in the Y direction, and cuts the engagement hole 231 penetrating in the X direction and a part around the engagement hole 231. A notch 232 is formed. The engagement plate portion 230 is made of the same resin as the left rear cover 203 and is formed when the left rear cover 203 is molded. The engagement hole 231 allows the engagement pin 220 to enter and leave in the X direction (first direction and third direction) by elastically deforming at least one of the engagement pin 220 and the engagement plate portion 230. That is, the engagement hole 231 is formed such that the engagement pin 220 can enter in the third direction and can be detached in the first direction.

係合ピン220の外周面の一部には、突起222が形成されている。突起222は、係合ピン220の先端寄りで、スリット221を挟んで両側にそれぞれ形成されている。即ち、上半部220aの上面と、下半部220bの下面とにそれぞれ突起222が形成されている。第1係止部としての突起222は、係合板部230と係合した状態で係止され、後カバー201が第1方向に移動することで、係合板部230との係合が外れ、後カバー201が第3方向に移動することで、係合板部230と係合した状態で係止される。また、突起222は、係合ピン220を係合板部230からX方向に沿って係合を外す方向(第1方向)に対して、係合ピン220が係合板部230と係合した状態で係合板部230の一部と引っ掛かることで係合板部230に係止される。言い換えれば、突起222は、係合ピン220が係合孔231に進入した状態で、係合ピン220が係合孔231からX方向(第1方向)に離脱する際に係合孔231の周りの一部と係止するように形成されている。   A protrusion 222 is formed on a part of the outer peripheral surface of the engagement pin 220. The protrusions 222 are formed on both sides of the slit 221 near the tip of the engagement pin 220. That is, the protrusions 222 are formed on the upper surface of the upper half 220a and the lower surface of the lower half 220b, respectively. The protrusion 222 as the first locking portion is locked in a state of being engaged with the engagement plate portion 230, and the rear cover 201 is moved in the first direction so that the engagement with the engagement plate portion 230 is released, and the rear By moving the cover 201 in the third direction, the cover 201 is locked in a state of being engaged with the engagement plate portion 230. Further, the protrusion 222 is in a state in which the engagement pin 220 is engaged with the engagement plate portion 230 with respect to a direction (first direction) in which the engagement pin 220 is disengaged from the engagement plate portion 230 along the X direction. By being hooked with a part of the engagement plate portion 230, the engagement plate portion 230 is locked. In other words, the protrusion 222 is formed around the engagement hole 231 when the engagement pin 220 is detached from the engagement hole 231 in the X direction (first direction) with the engagement pin 220 entering the engagement hole 231. It is formed so that it may be locked with a part of.

このような突起222は、係合ピン220と係合板部230の少なくとも一方が弾性変形することで、係合板部230との引っ掛かりが外れるようになっている。具体的には、係合ピン220がスリット221の間隔が狭くなるように弾性変形することで、突起222が係合孔231を通過可能である。そのために、図9に示すように、スリット221の自由状態での間隔Sは、突起222の高さH1、H2の合計よりも大きく(S>H1+H2)している。   Such a protrusion 222 is configured such that at least one of the engagement pin 220 and the engagement plate portion 230 is elastically deformed so that the engagement with the engagement plate portion 230 is released. Specifically, the protrusion 222 can pass through the engagement hole 231 by elastically deforming the engagement pin 220 so that the interval between the slits 221 is narrowed. Therefore, as shown in FIG. 9, the interval S in the free state of the slit 221 is larger than the sum of the heights H1 and H2 of the protrusions 222 (S> H1 + H2).

また、突起222は、図9に示すように、X方向両側(第1方向又は第3方向において両側)にそれぞれ端部に向かう程高さが低くなる傾斜面222a、222bを有する。即ち、突起222の第1方向側には傾斜面222bが、第3方向側には傾斜面222aがそれぞれ形成されている。傾斜面222a、222bは湾曲面であっても良い。このため、係合ピン220を係合板部230の係合孔231にX方向(第3方向)に挿入する際には、傾斜面222aが係合孔231の周縁部と係合する。一方、係合ピン220を係合孔231からX方向(第1方向)に抜き出す際には、傾斜面222bが係合孔231の周縁部と係合する。このように係合ピン220の挿入及び抜出動作に伴って、傾斜面222a、222bが係合孔231の周縁部と係合することで、係合ピン220が弾性変形して突起222が係合孔231を通過し易くしている。   Further, as shown in FIG. 9, the protrusion 222 has inclined surfaces 222 a and 222 b whose height decreases toward the ends on both sides in the X direction (both sides in the first direction or the third direction). That is, an inclined surface 222b is formed on the first direction side of the protrusion 222, and an inclined surface 222a is formed on the third direction side. The inclined surfaces 222a and 222b may be curved surfaces. For this reason, when the engagement pin 220 is inserted into the engagement hole 231 of the engagement plate portion 230 in the X direction (third direction), the inclined surface 222 a is engaged with the peripheral edge portion of the engagement hole 231. On the other hand, when the engagement pin 220 is extracted from the engagement hole 231 in the X direction (first direction), the inclined surface 222 b engages with the peripheral edge of the engagement hole 231. As described above, the inclined surfaces 222a and 222b engage with the peripheral edge portion of the engaging hole 231 as the engaging pin 220 is inserted and extracted, whereby the engaging pin 220 is elastically deformed and the protrusion 222 is engaged. It is easy to pass through the joint hole 231.

更に、係合ピン220の先端部外周面には、先端に向かう程径が小さくなる方向に湾曲した案内面223が形成されている。案内面223は、先端に向かう程スリット221側に傾斜した傾斜面であっても良い。係合ピン220を係合孔231にX方向に沿って挿入する際には、案内面223が係合孔231の周縁部と係合することで、係合ピン220が係合孔231内に案内されるため、係合ピン220のX方向への係合の作業性が良い。   Furthermore, a guide surface 223 that is curved in a direction in which the diameter decreases toward the tip is formed on the outer peripheral surface of the tip of the engagement pin 220. The guide surface 223 may be an inclined surface that is inclined toward the slit 221 toward the tip. When the engaging pin 220 is inserted into the engaging hole 231 along the X direction, the guide surface 223 engages with the peripheral edge portion of the engaging hole 231, so that the engaging pin 220 enters the engaging hole 231. Since it is guided, the workability of engaging the engagement pin 220 in the X direction is good.

一方、係合ピン220は、係合板部230の係合孔231に対して、切り欠き232を介してY方向(第2方向及び第4方向)にも進入及び離脱が可能である。このために切り欠き232は、係合板部230のY方向先端側に形成され、係合孔231の一部をY方向に開放している。したがって、係合ピン220と係合板部230の少なくとも一方が弾性変形することで、係合ピン220が切り欠き232を介して係合孔231に対してY方向に進入及び離脱が可能である。即ち、切り欠き232は、係合ピン220が係合孔231に対して第4方向に進入可能で、且つ、第2方向に離脱可能に形成されている。   On the other hand, the engagement pin 220 can enter and leave the engagement hole 231 of the engagement plate portion 230 in the Y direction (second direction and fourth direction) via the notch 232. For this purpose, the notch 232 is formed on the front end side in the Y direction of the engagement plate portion 230 and opens a part of the engagement hole 231 in the Y direction. Therefore, at least one of the engagement pin 220 and the engagement plate portion 230 is elastically deformed, so that the engagement pin 220 can enter and leave the engagement hole 231 in the Y direction via the notch 232. That is, the notch 232 is formed so that the engagement pin 220 can enter the engagement hole 231 in the fourth direction and can be detached in the second direction.

このために切り欠き232を形成する対向部232a、232bの間隔は、自由状態での係合ピン220の突起222から外れた部分の外径よりも小さく、且つ、弾性変形した係合ピン220のこの部分が通過可能としている。即ち、係合ピン220をY方向(第4方向)から係合孔231に進入させる場合、係合ピン220が係合孔231からX方向に脱落しないように、係合ピン220の突起222よりも基端側部分を切り欠き232に進入させる。したがって、対向部232a、232bの間隔は、スリット221の間隔が小さくなるように弾性変形した係合ピン220の突起222よりも基端側部分が通過可能な間隔としている。   For this reason, the interval between the facing portions 232a and 232b forming the notch 232 is smaller than the outer diameter of the portion of the engaging pin 220 that is disengaged from the protrusion 222 in the free state, and the elastically deforming engaging pin 220 is deformed. This part is allowed to pass. That is, when the engagement pin 220 enters the engagement hole 231 from the Y direction (fourth direction), the protrusion 222 of the engagement pin 220 prevents the engagement pin 220 from dropping in the X direction from the engagement hole 231. Also, the base end side portion is made to enter the notch 232. Therefore, the interval between the opposing portions 232a and 232b is set such that the base end side portion can pass through the protrusion 222 of the engaging pin 220 that is elastically deformed so that the interval between the slits 221 is reduced.

また、対向部232a、232bの間隔は、自由状態での係合ピン220の突起222よりも基端側部分の外径よりも小さくしている。これにより、切り欠き232を通過して係合孔231内に進入し、弾性的に復元した係合ピン220が切り欠き232から脱落しないようにしている。したがって、第2係止部としての対向部232a、232bは、係合ピン220を係合孔231からY方向に沿って係合を外す方向(第2方向)に対して、係合ピン220が係合板部230と係合した状態で係合ピン220の一部と引っ掛かることで係合ピン220に係止される。   Further, the interval between the facing portions 232a and 232b is set to be smaller than the outer diameter of the base end side portion of the protrusion 222 of the engaging pin 220 in the free state. Accordingly, the engagement pin 220 that passes through the notch 232 and enters the engagement hole 231 and is elastically restored is prevented from dropping from the notch 232. Therefore, the opposing portions 232a and 232b as the second locking portions are configured so that the engaging pin 220 is in the direction (second direction) in which the engaging pin 220 is disengaged from the engaging hole 231 along the Y direction. By being engaged with a part of the engagement pin 220 while being engaged with the engagement plate part 230, the engagement plate 220 is locked.

なお、対向部232a、232bは、係合ピン220と係合板部230の少なくとも一方が弾性変形することで、係合ピン220との係止が外れるようになっている。即ち、対向部232a、232bは、係合ピン220と係合した状態で係止され、左後カバー203が第2方向に移動することで、係合ピン220との係合が外れ、左後カバー203が前記第4方向に移動することで、係合ピン220と係合した状態で係止される。具体的には、上述のように係合ピン220がスリット221の間隔が狭くなるように弾性変形することで、係合ピン220が対向部232a、232bの間の切り欠き232を通過して、係合孔231から抜け出ることが可能である。   Note that the opposing portions 232a and 232b are configured to be unlocked from the engagement pin 220 when at least one of the engagement pin 220 and the engagement plate portion 230 is elastically deformed. That is, the facing portions 232a and 232b are locked in a state of being engaged with the engagement pin 220, and the left rear cover 203 is moved in the second direction, so that the engagement with the engagement pin 220 is released, and the left rear By moving the cover 203 in the fourth direction, the cover 203 is locked in a state of being engaged with the engagement pin 220. Specifically, as described above, the engagement pin 220 is elastically deformed so that the interval between the slits 221 is narrowed, so that the engagement pin 220 passes through the notch 232 between the facing portions 232a and 232b. It is possible to escape from the engagement hole 231.

また、係合ピン220の外周面のうち、係合ピン220を係合孔231に対してY方向に挿入及び離脱させる際に、対向部232a、232bと対向する部分には、X方向に沿って案内面224がそれぞれ形成されている。即ち、案内面224は、係合ピン220の上半部220aと下半部220bとにそれぞれ形成されている。上半部220aの案内面224は、突起222を挟んだY方向両側に、それぞれY方向端部側に向かう程下方に向かって傾斜、或いは、湾曲するように形成されている。下半部220bの案内面224は、突起222を挟んだY方向両側に、それぞれY方向端部側に向かう程上方に向かって傾斜、或いは、湾曲するように形成されている。   In addition, when the engagement pin 220 is inserted into and removed from the engagement hole 231 in the Y direction on the outer peripheral surface of the engagement pin 220, a portion facing the facing portions 232a and 232b extends along the X direction. The guide surfaces 224 are formed respectively. That is, the guide surfaces 224 are formed on the upper half 220a and the lower half 220b of the engagement pin 220, respectively. The guide surfaces 224 of the upper half 220a are formed on both sides in the Y direction across the protrusion 222 so as to be inclined or curved downward toward the end in the Y direction. The guide surfaces 224 of the lower half 220b are formed on both sides in the Y direction across the protrusion 222 so as to be inclined or curved upward toward the end in the Y direction.

このよう案内面224は、係合ピン220をY方向に切り欠き232に進入及び離脱する際に、対向部232a、232bと係合する。そして、係合ピン220の挿入及び抜出動作に伴って、案内面224と対向部232a、232bとの当接により、係合ピン220がスリット221の間隔が小さくなる方向に弾性変形する。この結果、係合ピン220が切り欠き232を通過し易くできる。   Thus, the guide surface 224 engages with the facing portions 232a and 232b when the engagement pin 220 enters and leaves the notch 232 in the Y direction. As the engagement pin 220 is inserted and extracted, the engagement pin 220 is elastically deformed in a direction in which the interval between the slits 221 is reduced by the contact between the guide surface 224 and the facing portions 232a and 232b. As a result, the engagement pin 220 can easily pass through the notch 232.

また、係合板部230のY方向先端部には、切り欠き232と連続し、且つ、切り欠き232から離れる程間隔が大きくなるように傾斜した切り欠き案内部233が形成されている。切り欠き案内部233は、係合ピン220のY方向から切り欠き232への進入を案内する。即ち、係合ピン220を係合孔231にY方向に沿って挿入する際には、係合ピン220の外周面が切り欠き案内部233と係合することで、係合ピン220が切り欠き232内に案内される。このため、本実施形態の場合には、係合ピン220のY方向への係合の作業性も良い。   In addition, a notch guide portion 233 that is continuous with the notch 232 and is inclined so that the interval increases as the distance from the notch 232 increases, at the tip end portion in the Y direction of the engagement plate portion 230. The notch guide portion 233 guides the engagement pin 220 from entering the notch 232 from the Y direction. That is, when the engaging pin 220 is inserted into the engaging hole 231 along the Y direction, the outer peripheral surface of the engaging pin 220 is engaged with the notch guide portion 233 so that the engaging pin 220 is notched. Guided into H.232. For this reason, in the case of this embodiment, the workability | operativity of the engagement to the Y direction of the engagement pin 220 is also good.

[係合動作]
次に、後カバー201と左後カバー203との係合動作について具体的に説明する。まず、図10(a)に示すように、後カバー201を左後カバー203に対してX方向(第3方向)に係合させる場合、係合ピン220を係合板部230の係合孔231に向けて図の矢印方向に進入させる。この際、係合ピン220の先端の案内面223により係合ピン220の先端部が係合孔231に案内される。係合ピン220を更に進入させると、突起222の傾斜面222aが係合孔231の周縁部と係合することで、係合ピン220がスリット221の間隔が狭くなる方向に弾性変形して、突起222が係合孔231を通過する。すると、係合ピン220が弾性的に復元し、図6に示した状態となる。
[Engagement operation]
Next, the engagement operation between the rear cover 201 and the left rear cover 203 will be specifically described. First, as shown in FIG. 10A, when the rear cover 201 is engaged with the left rear cover 203 in the X direction (third direction), the engagement pin 220 is engaged with the engagement hole 231 of the engagement plate portion 230. In the direction of the arrow in the figure. At this time, the leading end portion of the engaging pin 220 is guided to the engaging hole 231 by the guide surface 223 at the leading end of the engaging pin 220. When the engagement pin 220 is further advanced, the inclined surface 222a of the protrusion 222 is engaged with the peripheral edge of the engagement hole 231, so that the engagement pin 220 is elastically deformed in the direction in which the interval between the slits 221 is narrowed. The protrusion 222 passes through the engagement hole 231. Then, the engagement pin 220 is elastically restored to the state shown in FIG.

この際、後カバー201の端部からX方向に突出する突出部201aと、左後カバー203の係合板部230と連続して形成された壁部203aとが当接する。また、係合ピン220の突起222と係合板部230の係合孔231の周縁部との係合により、係合ピン220が係合孔231からX方向から抜け出ることが規制される。これにより、後カバー201と左後カバー203とがX方向に位置決めされる。更に、この状態では、係合孔231と係合ピン220の突起222よりも基端側の外周面との係合により、後カバー201と左後カバー203とがY方向及びZ方向に位置決めされる。この結果、係合ピン220と係合板部230との係合動作が終了し、後カバー201と左後カバー203との表面同士が段差なく整合する。   At this time, the protruding portion 201 a protruding in the X direction from the end portion of the rear cover 201 and the wall portion 203 a formed continuously with the engaging plate portion 230 of the left rear cover 203 abut. Further, the engagement between the protrusion 222 of the engagement pin 220 and the peripheral edge of the engagement hole 231 of the engagement plate portion 230 restricts the engagement pin 220 from coming out of the engagement hole 231 in the X direction. As a result, the rear cover 201 and the left rear cover 203 are positioned in the X direction. Further, in this state, the rear cover 201 and the left rear cover 203 are positioned in the Y direction and the Z direction by the engagement between the engagement hole 231 and the outer peripheral surface on the base end side with respect to the protrusion 222 of the engagement pin 220. The As a result, the engagement operation between the engagement pin 220 and the engagement plate portion 230 ends, and the surfaces of the rear cover 201 and the left rear cover 203 are aligned without any step.

次に、図10(b)に示すように、後カバー201を左後カバー203に対してY方向(第4方向)に係合させる場合、係合ピン220を係合板部230の切り欠き232に向けて図の矢印方向に進入させる。この際、係合板部230の切り欠き案内部233により係合ピン220が切り欠き232に案内される。係合ピン220を更に進入させると、係合ピン220の案内面224が対向部232a、232bと係合することで、係合ピン220がスリット221の間隔が狭くなる方向に弾性変形して、係合ピン220が切り欠き232を通過し、係合孔231に進入する。すると、係合ピン220が弾性的に復元し、図6に示した状態となり、係合ピン220をX方向に挿入した場合と同様に、後カバー201と左後カバー203とがX方向、Y方向及びZ方向に位置決めされる。そして、係合ピン220と係合板部230との係合動作が終了し、後カバー201と左後カバー203との表面同士が段差なく整合する。   Next, as illustrated in FIG. 10B, when the rear cover 201 is engaged with the left rear cover 203 in the Y direction (fourth direction), the engagement pin 220 is notched 232 of the engagement plate portion 230. In the direction of the arrow in the figure. At this time, the engagement pin 220 is guided to the notch 232 by the notch guide portion 233 of the engagement plate portion 230. When the engagement pin 220 is further advanced, the guide surface 224 of the engagement pin 220 is engaged with the facing portions 232a and 232b, whereby the engagement pin 220 is elastically deformed in a direction in which the interval between the slits 221 is narrowed. The engagement pin 220 passes through the notch 232 and enters the engagement hole 231. Then, the engagement pin 220 is elastically restored and the state shown in FIG. 6 is obtained, and the rear cover 201 and the left rear cover 203 are moved in the X direction and Y as in the case where the engagement pin 220 is inserted in the X direction. In the direction and the Z direction. Then, the engagement operation between the engagement pin 220 and the engagement plate portion 230 is completed, and the surfaces of the rear cover 201 and the left rear cover 203 are aligned without any step.

このように、係合ピン220を係合板部230に対してX方向に係合が可能なことによって、左後カバー203が先に装置本体に固定されている状態でも後カバー201を装置本体に取り付けることができる。また、係合ピン220を係合板部230に対してY方向に係合が可能なことによって、後カバー201が先に装置本体に固定されている状態でも左後カバー203を装置本体に取り付けることができる。即ち、後カバー201と左後カバー203との装置本体への装着順序に拘らず、後カバー201と左後カバー203との係合が可能となる。   In this way, the engagement pin 220 can be engaged with the engagement plate portion 230 in the X direction, so that the rear cover 201 can be attached to the apparatus main body even when the left rear cover 203 is fixed to the apparatus main body first. Can be attached. Further, since the engagement pin 220 can be engaged with the engagement plate portion 230 in the Y direction, the left rear cover 203 can be attached to the apparatus main body even when the rear cover 201 is fixed to the apparatus main body first. Can do. That is, the rear cover 201 and the left rear cover 203 can be engaged regardless of the mounting order of the rear cover 201 and the left rear cover 203 to the apparatus main body.

[係合を外す動作]
次に、後カバー201と左後カバー203との係合を外す動作について具体的に説明する。まず、後カバー201を左後カバー203に対してX方向(第1方向)に係合を外す場合、図10(a)の矢印とは逆方向に、係合ピン220を係合板部230に対して移動させる。この際、突起222の傾斜面222bが係合孔231の周縁部と係合することで、係合ピン220がスリット221の間隔が狭くなる方向に弾性変形して、突起222が係合孔231を通過し、係合ピン220を係合孔231から抜き出すことができる。そして、係合ピン220が弾性的に復元し、係合ピン220を係合板部230からX方向に係合を外す動作が完了する。
[Disengagement]
Next, the operation of disengaging the rear cover 201 and the left rear cover 203 will be specifically described. First, when the rear cover 201 is disengaged from the left rear cover 203 in the X direction (first direction), the engagement pin 220 is moved to the engagement plate portion 230 in the direction opposite to the arrow in FIG. Move against. At this time, the inclined surface 222 b of the protrusion 222 is engaged with the peripheral edge of the engagement hole 231, whereby the engagement pin 220 is elastically deformed in the direction in which the interval between the slits 221 is narrowed, and the protrusion 222 is engaged with the engagement hole 231. The engagement pin 220 can be extracted from the engagement hole 231. Then, the engagement pin 220 is elastically restored, and the operation of disengaging the engagement pin 220 from the engagement plate portion 230 in the X direction is completed.

次に、後カバー201を左後カバー203に対してY方向(第2方向)に係合を外す場合、図10(b)の矢印とは逆方向に、係合ピン220を係合板部230に対して移動させる。この際、係合ピン220の案内面224が対向部232a、232bと係合することで、係合ピン220がスリット221の間隔が狭くなる方向に弾性変形して、係合ピン220が切り欠き232を通過して、係合孔231から抜け出る。そして、係合ピン220が弾性的に復元し、係合ピン220を係合板部230からY方向に係合を外す動作が完了する。   Next, when the rear cover 201 is disengaged from the left rear cover 203 in the Y direction (second direction), the engagement pin 220 is moved in the direction opposite to the arrow in FIG. Move against. At this time, when the guide surface 224 of the engagement pin 220 is engaged with the opposing portions 232a and 232b, the engagement pin 220 is elastically deformed in the direction in which the interval between the slits 221 is narrowed, and the engagement pin 220 is notched. 232 passes through the engagement hole 231. Then, the engagement pin 220 is elastically restored, and the operation of disengaging the engagement pin 220 from the engagement plate portion 230 in the Y direction is completed.

このように、係合ピン220を係合板部230に対してX方向に係合を外すことが可能なことによって、左後カバー203を装置本体に装着した状態のまま後カバー201を装置本体から取り外すことができる。また、係合ピン220を係合板部230に対してY方向に係合を外すことが可能なことによって、後カバー201を装置本体に装着した状態のまま左後カバー203を装置本体から取り外すことができる。即ち、後カバー201と左後カバー203との装置本体への取り外し順序に拘らず、後カバー201と左後カバー203をそれぞれ装着又は取外すことが可能となる。   As described above, the engagement pin 220 can be disengaged from the engagement plate portion 230 in the X direction, so that the rear cover 201 can be removed from the apparatus main body while the left rear cover 203 is attached to the apparatus main body. Can be removed. Further, since the engagement pin 220 can be disengaged from the engagement plate portion 230 in the Y direction, the left rear cover 203 can be removed from the apparatus main body while the rear cover 201 is mounted on the apparatus main body. Can do. That is, regardless of the order of removing the rear cover 201 and the left rear cover 203 from the apparatus main body, the rear cover 201 and the left rear cover 203 can be respectively attached or removed.

また、係合ピン220を係合板部230に対してX方向に係合を外す際に、突起222の傾斜面222bが係合孔231の周縁部と係合することで、係合ピン220がスリット221の間隔が狭くなる方向に弾性変形するため、特に工具を使わずに容易に係合を外すことができる。また、係合ピン220を係合板部230に対してY方向に係合を外す際にも、係合ピン220の案内面224が対向部232a、232bと係合することで、係合ピン220がスリット221の間隔が狭くなる方向に弾性変形するため、特に工具を使わずに容易に係合を外すことができる。   Further, when the engagement pin 220 is disengaged from the engagement plate portion 230 in the X direction, the inclined surface 222b of the protrusion 222 is engaged with the peripheral edge portion of the engagement hole 231, so that the engagement pin 220 is Since the slit 221 is elastically deformed in the direction in which the interval between the slits 221 becomes narrow, the engagement can be easily disengaged without using a tool. Further, when the engagement pin 220 is disengaged from the engagement plate portion 230 in the Y direction, the engagement surface 220 of the engagement pin 220 is engaged with the opposing portions 232a and 232b, so that the engagement pin 220 is engaged. However, since it is elastically deformed in the direction in which the interval between the slits 221 is narrowed, the engagement can be easily disengaged without using a tool.

このように本実施形態の場合、後カバー201と左後カバー203とをどちらからでも装置本体に装着、又は、装置本体から取り外すことができる。このため、装置のメンテナンスなどの外装の着脱時における作業性を向上させられる。また、後カバー201と左後カバー203とを互いに係合させる構成であるため、カバー同士の合わせに段差ができにくく、外観の品位を良くすることができる。   As described above, in this embodiment, the rear cover 201 and the left rear cover 203 can be attached to or detached from the apparatus main body from either side. For this reason, the workability | operativity at the time of attachment / detachment of exteriors, such as an apparatus maintenance, can be improved. In addition, since the rear cover 201 and the left rear cover 203 are configured to engage with each other, it is difficult to make a step difference between the covers, and the appearance quality can be improved.

なお、図9に示したように、突起222の高さH1とH2の合計は、少なくともスリット221の自由状態での間隔Sより小さくしている。但し、突起222の高さH1とH2が小さ過ぎると、係合動作時の手応え(クリック感)が小さくなったり、係合状態の保持力(係合保持力)を十分に確保しにくくなったりする。したがって、突起222の高さH1とH2はある程度の高さを確保することが好ましいが、十分な高さを確保できない場合、何れか一方の突起222を省略して、他方の突起222の高さを確保するようにしても良い。   As shown in FIG. 9, the sum of the heights H <b> 1 and H <b> 2 of the protrusion 222 is at least smaller than the interval S in the free state of the slit 221. However, if the heights H1 and H2 of the protrusions 222 are too small, the response (click feeling) at the time of the engagement operation becomes small, or it is difficult to sufficiently secure the holding force (engagement holding force) in the engaged state. To do. Therefore, it is preferable to secure a certain height between the heights H1 and H2 of the protrusions 222. However, when a sufficient height cannot be ensured, one of the protrusions 222 is omitted and the height of the other protrusion 222 is obtained. May be secured.

また、上述の実施形態では、後カバー201と左後カバー203との係合を、係合ピン220と係合板部230との係合構成210で行った構成について説明したが、この係合構成210とは別に、後カバー201と左後カバー203とを装置本体に対して位置決め、或いは、固定しても良い。例えば、上述の実施形態の場合、後カバー201と左後カバー203との装置本体への最終的な固定は、ビスで行う。   In the above-described embodiment, the configuration in which the engagement between the rear cover 201 and the left rear cover 203 is performed by the engagement configuration 210 of the engagement pin 220 and the engagement plate portion 230 has been described. Apart from 210, the rear cover 201 and the left rear cover 203 may be positioned or fixed with respect to the apparatus main body. For example, in the above-described embodiment, the final fixing of the rear cover 201 and the left rear cover 203 to the apparatus main body is performed with screws.

<第2の実施形態>
第2の実施形態について、図11ないし図19を用いて説明する。本実施形態では、後カバー201Aの組み付け性を考慮して、係合ピン220Aの形状を第1の実施形態の係合ピン220に対して変更している。また、本実施形態では、係合ピン220Aと係合板部230との係合保持力よりも高い係合保持力を有する係合孔部材310と係合突部320を備えている。その他の構成及び作用は、第1の実施形態と同様であるため、以下、第1の実施形態と異なる点を中心に説明する。
<Second Embodiment>
A second embodiment will be described with reference to FIGS. In the present embodiment, the shape of the engagement pin 220A is changed with respect to the engagement pin 220 of the first embodiment in consideration of the ease of assembly of the rear cover 201A. In the present embodiment, the engagement hole member 310 and the engagement protrusion 320 having an engagement holding force higher than the engagement holding force between the engagement pin 220A and the engagement plate portion 230 are provided. Since other configurations and operations are the same as those of the first embodiment, the following description will focus on differences from the first embodiment.

図11に示すように、本実施形態の場合も、後カバー201A、右後カバー202A、左後カバー203Aにより、外装取外し構成又は外装装着構成としての外装構成200Aを構成している。これら後カバー201A、右後カバー202A、左後カバー203Aは、装置本体110(図1、2参照)に対して着脱可能である。また、後カバー201Aと右後カバー202A、及び、後カバー201Aと左後カバー203Aは、それぞれ互いに係合可能となっている。   As shown in FIG. 11, also in this embodiment, the rear cover 201A, the right rear cover 202A, and the left rear cover 203A constitute an exterior configuration 200A as an exterior removal configuration or an exterior mounting configuration. The rear cover 201A, the right rear cover 202A, and the left rear cover 203A can be attached to and detached from the apparatus main body 110 (see FIGS. 1 and 2). Further, the rear cover 201A and the right rear cover 202A, and the rear cover 201A and the left rear cover 203A can be engaged with each other.

また、本実施形態の場合、図12に示すように、後カバー201Aには、係合ピン220A及び係合突部320が、それぞれ右後カバー202A側と左後カバー203A側とに設けられている。一方、図13(a)に示すように、左後カバー203Aには、係合板部230及び係合孔部材310が後カバー201側に設けられている。同様に、図13(b)に示すように、右後カバー202Aには、係合板部230及び係合孔部材310が後カバー201側に設けられている。   In the case of the present embodiment, as shown in FIG. 12, the rear cover 201A is provided with an engagement pin 220A and an engagement protrusion 320 on the right rear cover 202A side and the left rear cover 203A side, respectively. Yes. On the other hand, as shown in FIG. 13A, the left rear cover 203A is provided with an engagement plate portion 230 and an engagement hole member 310 on the rear cover 201 side. Similarly, as shown in FIG. 13B, the right rear cover 202A is provided with an engagement plate portion 230 and an engagement hole member 310 on the rear cover 201 side.

本実施形態では、第1係合部としての係合ピン220Aと第2係合部としての係合板部230との係合構成を第1係合構成210A、第3係合部としての係合孔部材310と第4係合部としての係合突部320との係合構成を第2係合構成300とする。後カバー201Aと右後カバー202A、及び、後カバー201Aと左後カバー203Aの第1係合構成210A及び第2係合構成300は同じである。   In this embodiment, the engagement configuration of the engagement pin 220A as the first engagement portion and the engagement plate portion 230 as the second engagement portion is the first engagement configuration 210A and the engagement as the third engagement portion. An engagement configuration of the hole member 310 and the engagement protrusion 320 as the fourth engagement portion is a second engagement configuration 300. The first engagement configuration 210A and the second engagement configuration 300 of the rear cover 201A and the right rear cover 202A, and the rear cover 201A and the left rear cover 203A are the same.

[第1係合構成]
まず、本実施形態の第1係合構成210Aについて、図14及び図15を用いて説明する。後カバー201Aと左後カバー203Aが大型の部品の場合、係合が1箇所では足りずに複数必要になる場合も想定される。その場合、係合ピンと係合板部を複数並べて使用することも可能である。3つ以上並べて使用する場合、これらを直線上に配置する必要はないが、取り付け方向に対して垂直な平面上に配置する必要がある。
[First engagement configuration]
First, the first engagement configuration 210A of the present embodiment will be described with reference to FIGS. In the case where the rear cover 201A and the left rear cover 203A are large-sized parts, there may be a case where a plurality of engagements are not necessary at one place and a plurality of engagements are necessary. In that case, it is also possible to use a plurality of engaging pins and engaging plate portions side by side. When three or more are used side by side, it is not necessary to arrange them on a straight line, but it is necessary to arrange them on a plane perpendicular to the mounting direction.

ここで、1つのカバーに複数の係合ピンを配置する際、そのカバーの取り付け軌跡によっては部分的な干渉が発生する場合も考えられる。したがって、1例として、図14(a)、(b)を用いて、第1の実施形態のように、係合ピン220として、上半部220aと下半部220bの長さが同じである場合の問題点について説明する。なお、図14(b)では、上半部220aの突起222を省略して示しているが、上半部220aに突起222が設けられていても同様である。   Here, when a plurality of engagement pins are arranged on one cover, there may be a case where partial interference occurs depending on the attachment locus of the cover. Therefore, as an example, as shown in FIGS. 14A and 14B, the lengths of the upper half 220a and the lower half 220b are the same as the engagement pin 220 as in the first embodiment. The problem of the case will be described. In FIG. 14B, the protrusion 222 of the upper half 220a is omitted, but the same is true if the protrusion 222 is provided on the upper half 220a.

図14(a)に示すように、係合ピン220が設けられた左後カバー203Bの下端を予め装置本体に装着された下後カバー204に突き当てて、この突き当て位置Dを中心に回動させることで、左後カバー203Bを後カバー201Bと係合させる場合を考える。この場合、係合ピン220は、突き当て位置Dを回動中心とした軌跡上を通る。この際、図14(b)に示すように、後カバー201Bに設けられた係合板部230の係合孔231から外れた部分に係合ピン220の上半部220aが突き当たり、係合ピン220が係合孔231に進入できない場合がある。   As shown in FIG. 14 (a), the lower end of the left rear cover 203B provided with the engagement pin 220 is abutted against the lower rear cover 204 previously mounted on the apparatus main body, and is rotated around the abutting position D. Consider a case in which the left rear cover 203B is engaged with the rear cover 201B by moving. In this case, the engagement pin 220 passes on a trajectory having the abutting position D as a rotation center. At this time, as shown in FIG. 14B, the upper half portion 220a of the engagement pin 220 abuts on a portion of the engagement plate portion 230 provided in the rear cover 201B that is disengaged from the engagement hole 231. May not enter the engagement hole 231.

したがって、本実施形態の場合、図15(a)に示すように、係合ピン220Aの上半部220cの長さを下半部220bよりも短くしている。また、上半部220cを短くしたため、上半部220cの突起222を省略している。この場合でも、下半部220bの突起222の高さを十分確保していれば、係合保持力を十分に確保できる。   Therefore, in this embodiment, as shown in FIG. 15A, the length of the upper half 220c of the engagement pin 220A is shorter than that of the lower half 220b. Further, since the upper half 220c is shortened, the protrusion 222 of the upper half 220c is omitted. Even in this case, if the height of the protrusion 222 of the lower half 220b is sufficiently secured, the engagement holding force can be sufficiently secured.

このように係合ピン220Aの上半部220cを短くすることにより、左後カバー203Aを、図14(a)と同様に、突き当て位置Dを中心して回動させて係合動作を行っても係合ピン220Aを係合孔231に進入させることができる。即ち、図15(b)に示すように、まず、下半部220bの先端部が係合孔231に進入し、更に回動させると、下半部220bが弾性変形することで突起222が係合孔231を通過しつつ、上半部220cが係合板部230の係合孔231から外れた部分と干渉することなく、係合孔231に進入する。そして、図15(c)に示すように、係合ピン220Aが係合板部230と係合する。   By shortening the upper half 220c of the engagement pin 220A in this way, the left rear cover 203A is rotated around the abutting position D to perform the engagement operation, as in FIG. Also, the engaging pin 220A can enter the engaging hole 231. That is, as shown in FIG. 15B, first, when the tip of the lower half 220b enters the engagement hole 231 and further rotates, the lower half 220b is elastically deformed so that the protrusion 222 is engaged. While passing through the joint hole 231, the upper half part 220 c enters the engagement hole 231 without interfering with the part of the engagement plate part 230 that is disengaged from the engagement hole 231. Then, as shown in FIG. 15 (c), the engagement pin 220 </ b> A engages with the engagement plate portion 230.

係合ピン220Aと係合板部230との係合を外すべく、左後カバー203を図14(a)と逆方向に回動させた場合は、まず、係合ピン220Aの上半部220cが係合孔231から抜け出しつつ、下半部220bが弾性変形することで突起222が係合孔231を通過する。そして、係合ピン220A全体が係合孔231から抜け出て、係合ピン220Aと係合板部230との係合が外れる。本実施形態では、このような回動方向が第1方向及び第3方向に相当する。   When the left rear cover 203 is rotated in the direction opposite to that shown in FIG. 14A to release the engagement between the engagement pin 220A and the engagement plate 230, first, the upper half 220c of the engagement pin 220A is The protrusion 222 passes through the engagement hole 231 due to the elastic deformation of the lower half 220 b while coming out of the engagement hole 231. Then, the entire engagement pin 220A comes out of the engagement hole 231, and the engagement between the engagement pin 220A and the engagement plate portion 230 is released. In the present embodiment, such a rotation direction corresponds to the first direction and the third direction.

なお、本実施形態では、左後カバー203Aを回動させることで後カバー201Aと係合させる場合について説明したが、右後カバー202Aを回動させて後カバー201Aと係合させる場合も同様である。また、本実施形態のように、上半部220cの長さが短い係合ピン220Aを用いた構成であっても、第1の実施形態と同様に、X方向に係合ピン220Aを係合板部230の係合孔231に対して進入及び離脱が可能である。したがって、本実施形態の場合、X方向が第1方向及び第3方向であっても良い。   In this embodiment, the case where the left rear cover 203A is engaged with the rear cover 201A by rotating the left rear cover 203A has been described. However, the same applies to the case where the right rear cover 202A is rotated and engaged with the rear cover 201A. is there. Further, as in the present embodiment, even in the configuration using the engagement pin 220A having a short upper half 220c, the engagement pin 220A is inserted in the X direction in the same manner as in the first embodiment. It is possible to enter and leave the engagement hole 231 of the portion 230. Therefore, in this embodiment, the X direction may be the first direction and the third direction.

また、後カバー201Aを下後カバー204に突き当てて、同様に回動させることで、左後カバー203A又は右後カバー202Aを係合させる場合もある。この場合、後カバー201Aに設けられている係合板部230の切り欠き案内部233が、切り欠き232から離れる程間隔が広くなるように形成されているため、このような回動の際には、切り欠き案内部233が係合ピン220Aと係合する。そして、この係合により係合ピン220Aが切り欠き232に案内され、係合ピン220Aを係合孔231に進入させることができる。本実施形態では、このような回動方向が第2方向及び第4方向に相当する。但し、係合板部230は第1の実施形態と同様に、Y方向に係合ピン220Aと係合及び係合を外すことが可能であるため、Y方向が第2方向及び第4方向であっても良い。   Further, there is a case where the left rear cover 203A or the right rear cover 202A is engaged by abutting the rear cover 201A against the lower rear cover 204 and rotating in the same manner. In this case, the notch guide portion 233 of the engagement plate portion 230 provided in the rear cover 201A is formed so that the interval becomes wider as the distance from the notch 232 increases. The notch guide portion 233 engages with the engagement pin 220A. Then, the engagement pin 220A is guided to the notch 232 by this engagement, and the engagement pin 220A can enter the engagement hole 231. In the present embodiment, such a rotation direction corresponds to the second direction and the fourth direction. However, since the engagement plate portion 230 can be engaged and disengaged with the engagement pin 220A in the Y direction as in the first embodiment, the Y direction is the second direction and the fourth direction. May be.

[第2係合構成]
次に、本実施形態の第2係合構成300について、図12及び図13を参照しつつ図16ないし図19を用いて説明する。係合ピン220Aと係合板部230との係合だけでは、係合が不十分な場合がある。例えば、左後カバー203Aや右後カバー202Aには、装置本体に各種コネクタを装着するために凹みが形成される場合がある。このため、この凹みに人が手を掛けた場合などに係合が外れる方向に強く外力が作用する場合がある。この場合、係合ピン220Aが係合孔231からY方向に抜ける可能性がある。このために本実施形態では、上述の第1係合構成210Aに加えて、第1係合構成210Aよりも係合保持力が大きい、第2係合構成300を設けている。
[Second engagement configuration]
Next, the second engagement configuration 300 of the present embodiment will be described using FIGS. 16 to 19 with reference to FIGS. 12 and 13. The engagement may be insufficient only by the engagement between the engagement pin 220A and the engagement plate portion 230. For example, the left rear cover 203A and the right rear cover 202A may have a dent for attaching various connectors to the apparatus main body. For this reason, when a person puts a hand on this dent, an external force may act strongly in the direction of disengagement. In this case, there is a possibility that the engagement pin 220A comes out of the engagement hole 231 in the Y direction. For this reason, in the present embodiment, in addition to the first engagement configuration 210A described above, a second engagement configuration 300 having a larger engagement holding force than the first engagement configuration 210A is provided.

図13(a)、(b)及び図16(a)〜(c)に示すように、左後カバー203A及び右後カバー202A(一方の外装)には、それぞれ第3係合部としての係合孔部材310が設けられている。係合孔部材310は、係合板部230と同様に、左後カバー203A及び右後カバー202AからY方向に突出するように形成された板状部材で、X方向に貫通した進入孔311と、進入孔311のY方向先端側に設けられた当接部312とを有する。   As shown in FIGS. 13A and 13B and FIGS. 16A to 16C, the left rear cover 203A and the right rear cover 202A (one exterior) are respectively engaged as third engagement portions. A hole member 310 is provided. Similar to the engagement plate portion 230, the engagement hole member 310 is a plate-like member formed so as to protrude in the Y direction from the left rear cover 203A and the right rear cover 202A, and an entry hole 311 penetrating in the X direction; And a contact portion 312 provided on the front end side in the Y direction of the entry hole 311.

進入孔311は、係合板部230の係合孔231とは異なり切り欠きが形成されておらず、後述する係合突部320の一部である係合壁部321がX方向(一方の方向)に進入及び離脱が可能である。当接部312は、進入孔311に進入した係合壁部321がY方向(他方の方向)に離脱する方向に、係合壁部321と当接する。この結果、係合壁部321が進入孔311に進入した係合孔部材310と係合突部320との係合状態で、Y方向に対して、係合ピン220Aと係合板部230との係合保持力よりも高い係合保持力を確保できる。   Unlike the engagement hole 231 of the engagement plate portion 230, the entry hole 311 is not formed with a notch, and an engagement wall portion 321 that is a part of an engagement protrusion 320 described later is in the X direction (one direction). ) Can enter and leave. The contact portion 312 contacts the engagement wall portion 321 in a direction in which the engagement wall portion 321 that has entered the entry hole 311 is detached in the Y direction (the other direction). As a result, the engagement pin 220A and the engagement plate portion 230 are engaged with each other in the Y direction when the engagement wall member 321 enters the entry hole 311 and the engagement hole member 310 and the engagement protrusion 320 are engaged. An engagement holding force higher than the engagement holding force can be secured.

また、係合孔部材310のY方向先端部にはリブ部313が形成され、係合孔部材310の剛性を確保するようにしている。また、図16(c)に示すように、係合孔部材310のY方向先端部でリブ部313とは反対側の面は、Y方向先端に向かう程リブ部313に向かう方向に傾斜した傾斜面314としている。このような係合孔部材310は、係合板部230と同様に、左後カバー203A及び右後カバー202Aと同じ樹脂製で、左後カバー203A及び右後カバー202Aの成型時に形成される。   In addition, a rib portion 313 is formed at the front end of the engagement hole member 310 in the Y direction so as to ensure the rigidity of the engagement hole member 310. Further, as shown in FIG. 16C, the surface of the engagement hole member 310 opposite to the rib portion 313 at the tip end portion in the Y direction is inclined in a direction toward the rib portion 313 toward the tip end in the Y direction. Surface 314 is used. Similar to the engagement plate portion 230, the engagement hole member 310 is made of the same resin as the left rear cover 203A and the right rear cover 202A, and is formed when the left rear cover 203A and the right rear cover 202A are molded.

一方、図12及び図17(a)、(b)に示すように、後カバー201A(他方の外装)の左後カバー203A側と右後カバー202A側とには、それぞれ第4係合部としての係合突部320が設けられている。係合突部320は、係合ピン220Aと同様に、後カバー201AからX方向に突出するように形成され、係合孔部材310と係合自在である。このような係合突部320は、係合壁部321と、係合壁部321からY方向に延出されたリブ部322とから構成される。リブ部322は、X方向側の端部を左後カバー203A又は右後カバー202Aが係合する方向に向かう程高さが高くなるように傾斜した乗り越え案内部323としている。このような係合突部320は、係合ピン220Aと同様に、後カバー201と同じ樹脂製で、後カバー201Aの成型時に形成される。   On the other hand, as shown in FIGS. 12 and 17A and 17B, the left rear cover 203A side and the right rear cover 202A side of the rear cover 201A (the other exterior) are respectively provided as fourth engaging portions. The engagement protrusion 320 is provided. Similar to the engagement pin 220A, the engagement protrusion 320 is formed so as to protrude in the X direction from the rear cover 201A, and is engageable with the engagement hole member 310. Such an engaging protrusion 320 includes an engaging wall portion 321 and a rib portion 322 extending from the engaging wall portion 321 in the Y direction. The rib portion 322 is configured as an overpass guide portion 323 that is inclined so that the end portion on the X direction side becomes higher in the direction in which the left rear cover 203A or the right rear cover 202A is engaged. Similar to the engagement pin 220A, the engagement protrusion 320 is made of the same resin as the rear cover 201 and is formed when the rear cover 201A is molded.

後カバー201Aを左後カバー203A又は右後カバー202Aに対してX方向(第3方向)に係合させる場合には、係合突部320の係合壁部321が係合孔部材310の進入孔311にX方向に進入することで、係合突部320と係合孔部材310との係合が完了する。同様に、後カバー201Aを左後カバー203A又は右後カバー202Aに対してX方向(第1方向)に係合を外す場合には、係合壁部321が進入孔311からX方向に抜け出ることで、係合突部320と係合孔部材310との係合が外れる。前述の図15で説明したように、後カバー201Aを下後カバー204に突き当てて回動させる場合にも、同様に、係合壁部321が進入孔311に進入或いは抜け出ることで、係合及び係合を外すことができる。   When the rear cover 201A is engaged with the left rear cover 203A or the right rear cover 202A in the X direction (third direction), the engagement wall portion 321 of the engagement protrusion 320 enters the engagement hole member 310. By entering the hole 311 in the X direction, the engagement between the engagement protrusion 320 and the engagement hole member 310 is completed. Similarly, when the rear cover 201A is disengaged in the X direction (first direction) with respect to the left rear cover 203A or the right rear cover 202A, the engagement wall portion 321 comes out from the entry hole 311 in the X direction. Thus, the engagement between the engagement protrusion 320 and the engagement hole member 310 is released. As described above with reference to FIG. 15, when the rear cover 201 </ b> A is abutted against the lower rear cover 204 and is rotated, the engagement wall portion 321 enters and exits the entry hole 311 in the same manner. And can be disengaged.

一方、左後カバー203A又は右後カバー202Aを後カバー201Aに対してY方向(第4方向)に係合させる場合には、まず、係合孔部材310のY方向先端部に形成された傾斜面314が係合突部320の乗り越え案内部323と当接する。左後カバー203A又は右後カバー202Aを更にY方向に移動させることで、係合孔部材310の傾斜面314が乗り越え案内部323に案内されて、係合孔部材310が弾性変形する。   On the other hand, when the left rear cover 203A or the right rear cover 202A is engaged with the rear cover 201A in the Y direction (fourth direction), first, an inclination formed at the front end of the engagement hole member 310 in the Y direction. The surface 314 comes into contact with the overpass guide 323 of the engaging protrusion 320. By further moving the left rear cover 203A or the right rear cover 202A in the Y direction, the inclined surface 314 of the engagement hole member 310 is guided over the guide part 323, and the engagement hole member 310 is elastically deformed.

ここで、係合孔部材310は、Y方向に相対移動して係合突部320と係合する際には、当接部312が係合突部320を乗り越えるように弾性変形可能である。したがって、係合孔部材310の当接部312が乗り越え案内部323と連続した係合壁部321の先端を乗り越えることで、図18(a)〜(c)に示すように、係合壁部321が進入孔311に進入し、係合突部320と係合孔部材310との係合が完了する。左後カバー203A及び右後カバー202Aを後カバー201Aに対してこのように係合させることで、図19に示すような外装構成200Aが得られる。   Here, when the engagement hole member 310 is relatively moved in the Y direction and engaged with the engagement protrusion 320, the engagement hole member 310 can be elastically deformed so that the contact portion 312 gets over the engagement protrusion 320. Therefore, as shown in FIGS. 18A to 18C, the abutting portion 312 of the engaging hole member 310 gets over the tip of the engaging wall portion 321 that is continuous with the climbing guide portion 323. 321 enters the entry hole 311, and the engagement between the engagement protrusion 320 and the engagement hole member 310 is completed. By engaging the left rear cover 203A and the right rear cover 202A with the rear cover 201A in this way, an exterior configuration 200A as shown in FIG. 19 is obtained.

これに対して、左後カバー203A又は右後カバー202Aを後カバー201Aに対してY方向に係合を外す場合には、左後カバー203A又は右後カバー202AをひねりながらY方向に移動させる。例えば、左後カバー203A又は右後カバー202AをZ方向を軸として、係合孔部材310が係合壁部321から離れる方向(X方向)に回転させつつY方向に相対移動させる。これにより、当接部312が係合壁部321を乗り越えて、係合孔部材310と係合壁部321との係合が外れる。   On the other hand, when the left rear cover 203A or the right rear cover 202A is disengaged from the rear cover 201A in the Y direction, the left rear cover 203A or the right rear cover 202A is moved in the Y direction while twisting. For example, the left rear cover 203A or the right rear cover 202A is relatively moved in the Y direction while rotating the engagement hole member 310 in the direction away from the engagement wall portion 321 (X direction) with the Z direction as an axis. Thereby, the contact part 312 gets over the engagement wall part 321, and the engagement between the engagement hole member 310 and the engagement wall part 321 is released.

即ち、本実施形態の外装構成200Aは、係合孔部材310と係合突部320との係合状態から左後カバー203A又は右後カバー202Aを後カバー201Aに対してY方向(他方の方向)に相対移動させて係合孔部材310と係合突部320との係合を解除する際に、係合孔部材310が係合突部320に対してX方向(一方の方向)に移動して係合孔部材310と係合突部320との係合が解除されるように構成されている。   That is, in the exterior configuration 200A of the present embodiment, the left rear cover 203A or the right rear cover 202A is moved in the Y direction (the other direction) with respect to the rear cover 201A from the engaged state of the engagement hole member 310 and the engagement protrusion 320. ), The engagement hole member 310 moves in the X direction (one direction) with respect to the engagement protrusion 320 when the engagement between the engagement hole member 310 and the engagement protrusion 320 is released. Thus, the engagement between the engagement hole member 310 and the engagement protrusion 320 is released.

前述の図15で説明したように、左後カバー203A又は右後カバー202Aを下後カバー204に突き当てて回動させて係合させる場合にも、同様に、係合孔部材310が弾性変形することで当接部312が係合壁部321を乗り越えて、係合壁部321が進入孔311に進入する。そして、係合孔部材310と係合突部320との係合が完了する。また、このような回動により係合孔部材310と係合突部320との係合を外す場合には、このような回動に加えて、左後カバー203A又は右後カバー202AをZ方向を軸として、係合孔部材310が係合壁部321から離れる方向に回転させることで、同様に、係合孔部材310と係合突部320との係合を外すことができる。   As described above with reference to FIG. 15, when the left rear cover 203 </ b> A or the right rear cover 202 </ b> A is abutted against the lower rear cover 204 and rotated and engaged, the engagement hole member 310 is similarly elastically deformed. As a result, the contact portion 312 passes over the engaging wall portion 321, and the engaging wall portion 321 enters the entry hole 311. Then, the engagement between the engagement hole member 310 and the engagement protrusion 320 is completed. Further, when the engagement hole member 310 and the engagement protrusion 320 are disengaged by such rotation, in addition to such rotation, the left rear cover 203A or the right rear cover 202A is moved in the Z direction. Similarly, the engagement hole member 310 and the engagement protrusion 320 can be disengaged by rotating the engagement hole member 310 in a direction away from the engagement wall part 321 about the axis.

本実施形態の場合、このように第2係合構成300を設けることで、Y方向に対して、係合ピン220Aと係合板部230との係合保持力よりも高い係合保持力を確保できる。この結果、外力が作用しても左後カバー203Aや右後カバー202Aが後カバー201Aから不用意に外れることを防止できる。   In the case of this embodiment, by providing the second engagement configuration 300 in this way, an engagement holding force higher than the engagement holding force between the engagement pin 220A and the engagement plate portion 230 is ensured in the Y direction. it can. As a result, even if an external force is applied, the left rear cover 203A and the right rear cover 202A can be prevented from being inadvertently detached from the rear cover 201A.

また、係合ピン220Aを上半部220cが短い形状としているため、図15に示したように、左後カバー203A又は右後カバー202Aを下後カバー204に突き当てて回動させる場合にも、係合ピン220Aと係合板部230とを係合させる、又は、係合ピン220Aと係合板部230との係合を外すことができる。   Further, since the engagement pin 220A has a short upper half portion 220c, as shown in FIG. 15, the left rear cover 203A or the right rear cover 202A is abutted against the lower rear cover 204 and rotated. The engagement pin 220A and the engagement plate portion 230 can be engaged, or the engagement pin 220A and the engagement plate portion 230 can be disengaged.

このように、係合ピン220Aを係合板部230に対してX方向に係合を外すことが可能なことによって、左後カバー203A又は右後カバー202Aを装置本体に装着した状態のまま後カバー201Aを装置本体から取り外すことができる。また、係合ピン220Aを係合板部230に対してY方向に係合を外すことが可能なことによって、後カバー201Aを装置本体に装着した状態のまま左後カバー203A又は右後カバー202Aを装置本体から取り外すことができる。即ち、後カバー201Aと左後カバー203A又は右後カバー202Aとの装置本体への取り外し順序に拘らず、後カバー201A、左後カバー203A又は右後カバー202Aをそれぞれ装着又は取外すことが可能となる。   As described above, the engagement pin 220A can be disengaged in the X direction with respect to the engagement plate portion 230, so that the rear cover remains attached to the apparatus main body while the left rear cover 203A or the right rear cover 202A is mounted. 201A can be removed from the apparatus main body. Further, the engagement pin 220A can be disengaged from the engagement plate portion 230 in the Y direction, so that the left rear cover 203A or the right rear cover 202A can be mounted with the rear cover 201A mounted on the apparatus main body. It can be removed from the device body. That is, the rear cover 201A, the left rear cover 203A, or the right rear cover 202A can be mounted or removed regardless of the order in which the rear cover 201A and the left rear cover 203A or the right rear cover 202A are detached from the apparatus main body. .

また、係合ピン220Aを係合板部230に対してX方向に係合を外す際に、突起222の傾斜面222bが係合孔231の周縁部と係合することで、係合ピン220Aがスリット221の間隔が狭くなる方向に弾性変形するため、特に工具を使わずに容易に係合を外すことができる。また、係合ピン220Aを係合板部230に対してY方向に係合を外す際にも、係合ピン220の案内面224が対向部232a、232bと係合することで、係合ピン220Aがスリット221の間隔が狭くなる方向に弾性変形するため、特に工具を使わずに容易に係合を外すことができる。   Further, when the engagement pin 220A is disengaged from the engagement plate portion 230 in the X direction, the inclined surface 222b of the protrusion 222 is engaged with the peripheral portion of the engagement hole 231, so that the engagement pin 220A is Since the slit 221 is elastically deformed in the direction in which the interval between the slits 221 becomes narrow, the engagement can be easily disengaged without using a tool. Further, when the engagement pin 220A is disengaged from the engagement plate portion 230 in the Y direction, the guide surface 224 of the engagement pin 220 is engaged with the facing portions 232a and 232b, so that the engagement pin 220A is engaged. However, since it is elastically deformed in the direction in which the interval between the slits 221 is narrowed, the engagement can be easily disengaged without using a tool.

このように本実施形態の場合も、後カバー201Aと左後カバー203A又は右後カバー202Aとをどちらからでも装置本体に装着、又は、装置本体から取り外すことができる。このため、装置のメンテナンスなどの外装の着脱時における作業性を向上させられる。また、後カバー201Aと左後カバー203A又は右後カバー202Aとを互いに係合させる構成であるため、カバー同士の合わせに段差ができにくく、外観の品位を良くすることができる。   As described above, also in this embodiment, the rear cover 201A and the left rear cover 203A or the right rear cover 202A can be attached to or detached from the apparatus main body from either side. For this reason, the workability | operativity at the time of attachment / detachment of exteriors, such as an apparatus maintenance, can be improved. Further, since the rear cover 201A and the left rear cover 203A or the right rear cover 202A are engaged with each other, it is difficult to make a step difference between the covers and the appearance quality can be improved.

なお、第2係合構成300は、第1係合構成210AよりもY方向の係合保持力が大きければその構成は問わない。例えば、上述の説明では、第2係合構成300の係合孔部材310は、進入孔311に切り欠きがないように形成されているが、係合孔部材310のY方向先端側にY方向に開放する切り欠きを設けても良い。但し、この切り欠きの間隔は、係合板部230の切り欠き232の間隔よりも小さくする。これにより、Y方向に対して、第2係合構成300の係合保持力を第1係合構成210Aよりも大きくできる。   It should be noted that the second engagement configuration 300 may be of any configuration as long as the engagement holding force in the Y direction is larger than that of the first engagement configuration 210A. For example, in the above description, the engagement hole member 310 of the second engagement configuration 300 is formed so as not to have a notch in the entry hole 311, but in the Y direction on the distal end side of the engagement hole member 310 in the Y direction. A notch that opens may be provided. However, the interval between the notches is made smaller than the interval between the notches 232 of the engagement plate portion 230. Thereby, the engagement holding force of the 2nd engagement structure 300 can be made larger than the 1st engagement structure 210A with respect to the Y direction.

また、このように係合孔部材310に切り欠きを形成すれば、第1係合構成210AよりもY方向に係合を外す力を要するが、第2係合構成300についてもY方向に係合を外すことができる。即ち、左後カバー203A又は右後カバー202AをひねることなくY方向に移動させるだけで、第1係合構成210A及び第2係合構成300の係合を外すことができる。   Further, if the notch is formed in the engagement hole member 310 in this way, a force for releasing the engagement in the Y direction is required as compared with the first engagement configuration 210A, but the second engagement configuration 300 is also related in the Y direction. Can be removed. That is, the first engagement structure 210A and the second engagement structure 300 can be disengaged simply by moving the left rear cover 203A or the right rear cover 202A in the Y direction without twisting.

また、後カバー201Aの右後カバー202A或いは左後カバー203Aと係合する側に係合ピンを複数設ける構成の場合、何れかの係合ピンについては、上半部及び下半部の突起を省略しても良い。例えば、後カバー201Aと共に係合ピンを成型する際に、他の部分と干渉して突起を形成できるような型の製造が難しい場合がある。この場合、その部分のみ、突起がない係合ピンとし、他の部分を上述のような突起のある係合ピンとしても良い。突起がない係合ピンであっても、係合ピンと係合板部の係合孔との係合により、カバー同士の位置決めには有効である。また、本実施形態のように、第2係合構成300を設けることで、突起がない係合ピンがあっても、カバー同士の係合保持力を確保できる。   Further, in the case where a plurality of engagement pins are provided on the side of the rear cover 201A that engages with the right rear cover 202A or the left rear cover 203A, the protrusions of the upper half and the lower half are provided for any of the engagement pins. May be omitted. For example, when the engagement pin is molded together with the rear cover 201A, it may be difficult to manufacture a mold that can interfere with other portions to form a protrusion. In this case, only that portion may be an engaging pin without a protrusion, and the other portion may be an engaging pin with a protrusion as described above. Even if the engagement pin has no protrusion, it is effective for positioning the covers by engagement between the engagement pin and the engagement hole of the engagement plate portion. Further, by providing the second engagement configuration 300 as in the present embodiment, it is possible to ensure the engagement holding force between the covers even if there is an engagement pin without a protrusion.

また、上述の説明のように、後カバー201Aを下後カバー204との突き当て位置を中心として回動させることで着脱する構成でなければ、係合ピンは、第1の実施形態と同様の構成であっても良い。   In addition, as described above, the engagement pin is the same as that of the first embodiment unless the rear cover 201A is configured to be attached and detached by rotating around the abutting position with the lower rear cover 204. It may be a configuration.

また、第2係合構成300は、カバーの形状などによって外力によりそのカバーが外れ易い方向に係合保持力が大きくなるように設ける。上述の説明では、右後カバー202A及び左後カバー203Aが外力によりY方向に外れ易くなる可能性があるため、Y方向の係合保持力が大きくなるように設けた。これに対して、例えば、後カバー201Aが外力によりX方向に外れ易い形状であれば、係合孔部材310を後カバー201Aに、係合突部320を右後カバー202A及び左後カバー203Aに設けて、X方向の係合保持力を大きくする。   Further, the second engagement configuration 300 is provided so that the engagement holding force is increased in a direction in which the cover is easily removed by an external force depending on the shape of the cover. In the above description, the right rear cover 202A and the left rear cover 203A are likely to be detached in the Y direction by an external force, so that the engagement holding force in the Y direction is increased. On the other hand, for example, if the rear cover 201A has a shape that can be easily removed in the X direction by an external force, the engagement hole member 310 is attached to the rear cover 201A, and the engagement protrusion 320 is attached to the right rear cover 202A and the left rear cover 203A. To increase the engagement holding force in the X direction.

また、X方向及びY方向の係合保持力を大きくしたい場合には、それぞれの方向の係合保持力が大きくなるように2つのカバーの係合部分に2個の第2係合構成300を設けても良い。例えば、後カバー201Aが外力によりX方向に外れ易い形状を有し、右後カバー202Aも外力によりY方向に外れ易い形状を有する場合を考える。この場合、後カバー201Aに係合孔部材310及び係合突部320を設け、右後カバー202Aに後カバー201Aの係合孔部材310と係合する係合突部320と、後カバー201Aの係合突部320と係合する係合孔部材310を設ける。   Further, when it is desired to increase the engagement holding force in the X direction and the Y direction, two second engagement configurations 300 are provided at the engagement portions of the two covers so that the engagement holding force in each direction is increased. It may be provided. For example, consider a case in which the rear cover 201A has a shape that is easily detached in the X direction by an external force, and the right rear cover 202A has a shape that is easily detached in the Y direction by an external force. In this case, the engagement hole member 310 and the engagement protrusion 320 are provided on the rear cover 201A, the engagement protrusion 320 that engages with the engagement hole member 310 of the rear cover 201A, and the rear cover 201A. An engagement hole member 310 that engages with the engagement protrusion 320 is provided.

<他の実施形態>
上述の各実施形態では、係合ピン220、220Aを後カバー201、201Aに、係合板部230を右後カバー202、202A及び左後カバー203、203Aに設けたが、これらを入れ替えても受けても良い。即ち、係合ピン220、220Aを右後カバー202、202A及び左後カバー203、203Aに、係合板部230を後カバー201、201Aに設けても良い。この場合、第1方向がY方向、第2方向がX方向になる。
<Other embodiments>
In each of the embodiments described above, the engagement pins 220 and 220A are provided on the rear covers 201 and 201A, and the engagement plate portion 230 is provided on the right rear covers 202 and 202A and the left rear covers 203 and 203A. May be. That is, the engagement pins 220 and 220A may be provided on the right rear cover 202 and 202A and the left rear cover 203 and 203A, and the engagement plate portion 230 may be provided on the rear cover 201 and 201A. In this case, the first direction is the Y direction and the second direction is the X direction.

また、上述の説明では、第1係合部としての係合ピン220、220Aが弾性変形して第2係合部としての係合板部230の係合孔231に係合及び係合が外れるとした。但し、係合板部230が弾性変形して、或いは、係合ピン220及び係合板部230の両方が弾性変形して、これらの係合及び係合を外すことを可能としても良い。   Further, in the above description, when the engagement pins 220 and 220A as the first engagement portion are elastically deformed and the engagement hole 231 of the engagement plate portion 230 as the second engagement portion is engaged and disengaged. did. However, the engagement plate portion 230 may be elastically deformed, or both the engagement pin 220 and the engagement plate portion 230 may be elastically deformed to enable engagement and disengagement thereof.

また、第1係合部は、係合ピン220、200Aのような形状に限らず、例えば、スリットをX方向に直交する断面で交差するように2本設け、ピンを4分割するような形状としても良い。或いは、スリットを設けずにゴムなどの弾性変形し易い弾性材により形成された円柱状のものであっても良い。この場合でも、ゴムに突起を形成して係合孔231に引っ掛かり易くすることが好ましい。   In addition, the first engagement portion is not limited to the shape of the engagement pins 220 and 200A. For example, two slits are provided so as to intersect with a cross section orthogonal to the X direction, and the shape of the pin is divided into four. It is also good. Alternatively, it may be a cylindrical one made of an elastic material that is easily elastically deformed such as rubber without providing a slit. Even in this case, it is preferable to form a protrusion on the rubber so that it can be easily caught in the engagement hole 231.

また、第2係合部は、係合孔231を有する係合板部230のような形状に限らず、第1係合部とX方向及びY方向に係合及び係合を外すことが可能で、係合した状態で第1係合部をY方向及びZ方向に位置決めできるものであれば良い。例えば、2つの部材を対向配置し、少なくとも何れかの部材の対向部分に凹部を形成することなどのより第1係合部がX方向に進入可能な隙間を形成する。そして、第1係合部がこの隙間にY方向から進入及びこの隙間からY方向に離脱する場合に、2つの部材が弾性変形して互いに離れるようにする。   The second engaging portion is not limited to the shape of the engaging plate portion 230 having the engaging hole 231, and can be engaged and disengaged with the first engaging portion in the X direction and the Y direction. Any device that can position the first engaging portion in the Y direction and the Z direction in an engaged state may be used. For example, a gap that allows the first engaging portion to enter in the X direction is formed by arranging two members facing each other and forming a recess in a facing portion of at least one of the members. Then, when the first engaging portion enters the gap from the Y direction and leaves the gap from the Y direction, the two members are elastically deformed to be separated from each other.

また、上述したような外装構成は、画像形成装置以外の他の装置の外装構成にも適用可能である。要は、複数の外装を組み合わせて装置本体に着脱する構成であれば、本発明を好ましく適用できる。   Further, the exterior configuration as described above can be applied to the exterior configuration of other apparatuses other than the image forming apparatus. In short, the present invention can be preferably applied as long as a plurality of exteriors are combined and attached to and detached from the apparatus main body.

10・・・画像形成部/100・・・画像形成装置/110・・・装置本体/201、201A・・・・後カバー(第1外装)/202、202A・・・右後カバー(第2外装)/203、203A・・・左後カバー(第2外装)/210・・・係合構成/210A・・・第1係合構成/220、220A・・・係合ピン(第1係合部、突出部)/221・・・スリット/222・・・突起(第1係止部)/222a、222b・・・傾斜面/223、224・・・案内面/230・・・係合板部(第2係合部)/231・・・係合孔/232・・・切り欠き/232a、232b・・・対向部(第2係止部)/233・・・切り欠き案内部/300・・・第2係合構成/310・・・係合孔部材(第3係合部)/311・・・進入孔/312・・・当接部/314・・・傾斜面/320・・・係合突部(第4係合部)/321・・・係合壁部/322・・・リブ部/323・・・乗り越え案内部   10 ... Image forming unit / 100 ... Image forming apparatus / 110 ... Main body / 201, 201A ... Rear cover (first exterior) / 202, 202A ... Right rear cover (second) Exterior) / 203, 203A ... Left rear cover (second exterior) / 210 ... Engagement configuration / 210A ... First engagement configuration / 220, 220A ... Engagement pin (first engagement) Portion, projection portion) / 221... Slit / 222... Projection (first locking portion) / 222 a, 222 b... Inclined surface / 223, 224... Guide surface / 230. (Second engaging part) / 231 ... engaging hole / 232 ... notch / 232a, 232b ... opposing part (second locking part) / 233 ... notch guide part / 300 .... Second engagement configuration / 310 ... engagement hole member (third engagement part) / 311 ... entry hole / 31 ... Contact part / 314 ... Inclined surface / 320 ... engagement protrusion (fourth engagement part) / 321 ... engagement wall part / 322 ... rib part / 323 ... Get over guide

Claims (30)

装置本体に対して着脱可能な第1外装及び第2外装と、
前記第1外装に設けられ、前記第1外装が第1方向へ移動することで前記第2外装に係止された状態から前記第1外装を取外し可能な第1係合部と、
前記第2外装に設けられ、前記第2外装が前記第1方向とは異なる第2方向に移動することで前記第1外装に係止された状態から前記第2外装を取外し可能な第2係合部と、を有する、
ことを特徴とする外装取外し構成。
A first exterior and a second exterior detachable from the apparatus body;
A first engagement portion provided on the first exterior and capable of removing the first exterior from a state where the first exterior is locked to the second exterior by moving in the first direction;
A second engagement provided on the second exterior and capable of removing the second exterior from a state of being locked to the first exterior by moving the second exterior in a second direction different from the first direction. Having a joint part,
The exterior removal structure characterized by this.
前記第1係合部及び前記第2係合部は、少なくとも一方が弾性変形し、互いに係合及び係合解除する
ことを特徴とする請求項1に記載の外装取外し構成。
The exterior removal structure according to claim 1, wherein at least one of the first engagement portion and the second engagement portion is elastically deformed to engage and disengage each other.
前記第1係合部は、前記第2係合部と係合した状態で係止され、前記第1外装が前記第1方向に移動することで、前記第2係合部との係合が外れる第1係止部を有する、
ことを特徴とする、請求項1又は2に記載の外装取外し構成。
The first engagement portion is locked in a state of being engaged with the second engagement portion, and the first exterior is moved in the first direction so that the engagement with the second engagement portion is performed. Having a first locking part that comes off,
The exterior removal structure according to claim 1 or 2, characterized in that
前記第2係合部は、前記第1係合部と係合した状態で係止され、前記第2外装が前記第2方向に移動することで、前記第1係合部との係合が外れる第2係止部を有する、
ことを特徴とする、請求項1乃至3のいずれか1項に記載の外装取外し構成。
The second engagement portion is locked in a state of being engaged with the first engagement portion, and the second exterior is moved in the second direction so that the engagement with the first engagement portion is performed. Having a second locking part that comes off,
The exterior removal structure according to any one of claims 1 to 3, wherein
前記第1方向と前記第2方向は、互いに直交する方向である、
ことを特徴とする、請求項1乃至4のいずれか1項に記載の外装取外し構成。
The first direction and the second direction are directions orthogonal to each other.
The exterior removal structure according to any one of claims 1 to 4, wherein
前記第2係合部は、前記第1係合部と前記第2係合部の少なくとも一方が弾性変形することで前記第1係合部が前記第1方向に離脱が可能な係合孔と、前記第1係合部と前記第2係合部の少なくとも一方が弾性変形することで前記第1係合部が前記係合孔に対して前記第2方向に離脱が可能な切り欠きとが形成されている、
ことを特徴とする、請求項1乃至5のいずれか1項に記載の外装取外し構成。
The second engagement portion includes an engagement hole that allows the first engagement portion to be detached in the first direction by elastically deforming at least one of the first engagement portion and the second engagement portion. And a notch that allows the first engagement portion to be separated from the engagement hole in the second direction by elastically deforming at least one of the first engagement portion and the second engagement portion. Formed,
The exterior removal structure according to any one of claims 1 to 5, wherein
前記第2係合部は、前記第1係合部の前記第2方向から前記切り欠きへの進入を案内する切り欠き案内部を有する、
ことを特徴とする、請求項6に記載に外装取外し構成。
The second engagement portion includes a notch guide portion that guides the first engagement portion from entering the notch from the second direction.
The exterior removal structure according to claim 6, wherein:
前記第1係合部は、前記第1外装から前記第1方向に突出するように形成された突出部である、
ことを特徴とする、請求項6又は7に記載の外装取外し構成。
The first engaging portion is a protruding portion formed to protrude in the first direction from the first exterior.
The exterior removal structure according to claim 6 or 7, wherein
前記第1係合部は、前記突出部の外周面の一部に形成され、前記突出部が前記係合孔に進入した状態で、前記突出部が前記係合孔から前記第1方向に離脱する際に前記係合孔の周りの一部と係止するように形成された突起を有する、
ことを特徴とする、請求項8に記載の外装取外し構成。
The first engaging portion is formed on a part of the outer peripheral surface of the protruding portion, and the protruding portion is detached from the engaging hole in the first direction in a state where the protruding portion has entered the engaging hole. A protrusion formed so as to be locked with a part around the engagement hole when
The exterior removal structure according to claim 8, wherein:
前記突起は、前記第1方向において両側にそれぞれ端部に向かう程高さが低くなる傾斜面を有する、
ことを特徴とする、請求項9に記載の外装取外し構成。
The protrusion has an inclined surface whose height decreases toward both ends in the first direction.
The exterior removal configuration according to claim 9, wherein:
前記第1外装と前記第2外装との何れか一方の外装に設けられた第3係合部と、
前記第1外装と前記第2外装との何れか他方の外装に設けられ、前記第3係合部と係合自在で、前記第3係合部と係合した状態で、前記第1係合部と前記第2係合部との係合保持力よりも高い係合保持力を有する第4係合部と、を備えた、
ことを特徴とする、請求項1乃至10のいずれか1項に記載の外装取外し構成。
A third engagement portion provided on any one of the first exterior and the second exterior;
The first engagement is provided on the other exterior of the first exterior and the second exterior, is freely engageable with the third engagement portion, and is engaged with the third engagement portion. A fourth engagement portion having an engagement holding force higher than an engagement holding force between the portion and the second engagement portion,
The exterior detachment structure according to any one of claims 1 to 10, wherein:
前記第3係合部は、前記第1方向と前記第2方向との何れか一方の方向に前記第4係合部の一部が進入及び離脱が可能な進入孔と、前記進入孔に進入した前記第4係合部の一部が前記第1方向と前記第2方向との何れか他方の方向に離脱する方向に、前記第4係合部の一部と当接する当接部とを有する、
ことを特徴とする、請求項11に記載の外装取外し構成。
The third engagement portion is an entry hole in which a part of the fourth engagement portion can enter and leave in either one of the first direction and the second direction, and enters the entry hole. An abutting portion that abuts a part of the fourth engaging portion in a direction in which a part of the fourth engaging portion is detached in either the first direction or the second direction. Have
The exterior removal structure according to claim 11, wherein:
前記第3係合部は、前記他方の方向に相対移動して前記第4係合部に係合する際に、前記当接部が前記第4係合部を乗り越えるように弾性変形可能である、
ことを特徴とする、請求項12に記載の外装取外し構成。
The third engaging portion is elastically deformable so that the contact portion gets over the fourth engaging portion when the third engaging portion relatively moves in the other direction and engages with the fourth engaging portion. ,
The exterior removal structure according to claim 12, wherein:
前記第4係合部は、前記第3係合部が前記他方の方向に相対移動して前記第4係合部に係合する際に、前記第3係合部が前記第4係合部を乗り越えるように前記当接部を案内する乗り越え案内部を有する、
ことを特徴とする、請求項13に記載の外装取外し構成。
The fourth engagement portion is configured such that when the third engagement portion relatively moves in the other direction and engages with the fourth engagement portion, the third engagement portion becomes the fourth engagement portion. Having a ride-over guide portion for guiding the contact portion so as to get over
The exterior detachment configuration according to claim 13, wherein:
前記第3係合部と前記第4係合部との係合状態から前記一方の外装を前記他方の外装に対して前記他方の方向に相対移動させて前記第3係合部と前記第4係合部との係合を解除する際に、前記第3係合部が前記第4係合部に対して前記一方の方向に移動して前記第3係合部と前記第4係合部との係合が解除されるように構成されている、
ことを特徴とする、請求項11乃至14のいずれか1項に記載の外装取外し構成。
By moving the one exterior relative to the other exterior in the other direction from the engaged state of the third engagement portion and the fourth engagement portion, the third engagement portion and the fourth engagement When releasing the engagement with the engagement portion, the third engagement portion moves in the one direction with respect to the fourth engagement portion, and the third engagement portion and the fourth engagement portion Is configured to be disengaged from
The exterior detachment configuration according to any one of claims 11 to 14, wherein
装置本体と、
前記装置本体内に設けられ、シートに画像を形成する画像形成部と、
請求項1乃至14のいずれか1項に記載の外装取外し構成と、を備えた、
ことを特徴とする画像形成装置。
The device body;
An image forming unit provided in the apparatus main body and forming an image on a sheet;
An exterior removal configuration according to any one of claims 1 to 14, and
An image forming apparatus.
装置本体に対して着脱可能な第1外装及び第2外装と、
前記第1外装に設けられ、前記第1外装が第3方向へ移動することによって前記第2外装に係止され、前記第1外装を装着可能な第1係合部と、
前記第2外装に設けられ、前記第2外装が前記第3方向と異なる第4方向へ移動することによって前記第1外装に係止され、前記第2外装を装着可能な第2係合部と、を有する、
ことを特徴とする外装装着構成。
A first exterior and a second exterior detachable from the apparatus body;
A first engagement portion that is provided on the first exterior, is locked to the second exterior by moving the first exterior in a third direction, and is capable of mounting the first exterior;
A second engagement portion provided on the second exterior, wherein the second exterior is locked to the first exterior by moving in a fourth direction different from the third direction, and the second exterior is attachable to the second exterior; Having
An exterior mounting structure characterized by that.
記第1係合部及び前記第2係合部は、少なくとも一方が弾性変形し、互いに係合する
ことを特徴とする請求項17に記載の外装装着構成。
The exterior mounting configuration according to claim 17, wherein at least one of the first engaging portion and the second engaging portion is elastically deformed and engaged with each other.
前記第1係合部は、前記第1外装が前記第3方向に移動することで、前記第2係合部と係合した状態で係止される第1係止部を有する、
ことを特徴とする、請求項17又は18に記載の外装装着構成。
The first engaging portion includes a first locking portion that is locked in a state of being engaged with the second engaging portion by moving the first exterior in the third direction.
The exterior mounting structure according to claim 17 or 18, characterized in that
前記第2係合部は、前記第2外装が前記第4方向に移動することで、前記第1係合部と係合した状態で係止される第2係止部を有する、
ことを特徴とする、請求項17乃至19のいずれか1項に記載の外装装着構成。
The second engaging portion has a second locking portion that is locked in a state of being engaged with the first engaging portion as the second exterior moves in the fourth direction.
The exterior mounting structure according to any one of claims 17 to 19, characterized by the above.
前記第2係合部は、前記第1係合部と前記第2係合部の少なくとも一方が弾性変形することで前記第1係合部が前記第3方向に進入が可能な係合孔と、前記第1係合部と前記第2係合部の少なくとも一方が弾性変形することで前記第1係合部が前記係合孔に対して前記第4方向に進入が可能な切り欠きとが形成されている、
ことを特徴とする、請求項17乃至20のいずれか1項に記載の外装装着構成。
The second engagement portion includes an engagement hole through which at least one of the first engagement portion and the second engagement portion is elastically deformed so that the first engagement portion can enter in the third direction. A notch that allows at least one of the first engagement portion and the second engagement portion to elastically deform so that the first engagement portion can enter the fourth direction with respect to the engagement hole. Formed,
The exterior mounting structure according to any one of claims 17 to 20, wherein
前記第2係合部は、前記第1係合部の前記第4方向から前記切り欠きへの進入を案内する切り欠き案内部を有する、
ことを特徴とする、請求項21に記載に外装装着構成。
The second engagement portion has a notch guide portion for guiding the first engagement portion from entering the notch from the fourth direction.
The exterior mounting configuration according to claim 21, wherein:
前記第1係合部は、前記第1外装から前記第3方向に突出するように形成された突出部である、
ことを特徴とする、請求項21又は22に記載の外装装着構成。
The first engaging portion is a protruding portion formed to protrude in the third direction from the first exterior.
The exterior mounting structure according to claim 21 or 22, wherein
前記第1係合部は、前記突出部の外周面の一部に形成され、前記突出部が前記係合孔に進入した状態で、前記突出部が前記係合孔から離脱する方向において前記係合孔の周りの一部と係止するように形成された突起を有する、
ことを特徴とする、請求項23に記載の外装装着構成。
The first engaging portion is formed on a part of the outer peripheral surface of the protruding portion, and the engaging portion extends in a direction in which the protruding portion is detached from the engaging hole in a state where the protruding portion has entered the engaging hole. Having a protrusion formed so as to be engaged with a part around the joint hole;
The exterior mounting structure according to claim 23, wherein:
前記突起は、前記第3方向において両側にそれぞれ端部に向かう程高さが低くなる傾斜面を有する、
ことを特徴とする、請求項24に記載の外装装着構成。
The protrusion has an inclined surface whose height decreases toward both ends in the third direction.
The exterior mounting structure according to claim 24, wherein:
前記第1外装と前記第2外装との何れか一方の外装に設けられた第3係合部と、
前記第1外装と前記第2外装との何れか他方の外装に設けられ、前記第3係合部と係合自在で、前記第3係合部と係合した状態で、前記第1係合部と前記第2係合部との係合保持力よりも高い係合保持力を有する第4係合部と、を備えた、
ことを特徴とする、請求項17乃至25のいずれか1項に記載の外装装着構成。
A third engagement portion provided on any one of the first exterior and the second exterior;
The first engagement is provided on the other exterior of the first exterior and the second exterior, is freely engageable with the third engagement portion, and is engaged with the third engagement portion. A fourth engagement portion having an engagement holding force higher than an engagement holding force between the portion and the second engagement portion,
The exterior mounting structure according to any one of claims 17 to 25, wherein:
前記第3係合部は、前記第3方向と前記第4方向との何れか一方の方向に前記第4係合部の一部が進入及び離脱が可能な進入孔と、前記進入孔に進入した前記第4係合部の一部が前記第3方向と前記第4方向とのいずれか他方の方向に離脱する際に、前記第4係合部の一部と当接する当接部とを有する、
ことを特徴とする、請求項26に記載の外装装着構成。
The third engagement portion is an entrance hole in which a part of the fourth engagement portion can enter and leave in any one of the third direction and the fourth direction, and enters the entrance hole. An abutting portion that abuts a part of the fourth engaging part when a part of the fourth engaging part is detached in the other direction of the third direction and the fourth direction. Have
27. The exterior mounting configuration according to claim 26, wherein:
前記第3係合部は、前記他方の方向に相対移動して前記第4係合部に係合する際に、前記当接部が前記第4係合部を乗り越えるように弾性変形可能である、
ことを特徴とする、請求項27に記載の外装装着構成。
The third engaging portion is elastically deformable so that the contact portion gets over the fourth engaging portion when the third engaging portion relatively moves in the other direction and engages with the fourth engaging portion. ,
The exterior mounting configuration according to claim 27, wherein:
前記第4係合部は、前記第3係合部が前記他方の方向に相対移動して前記第4係合部に係合する際に、前記第3係合部が前記第4係合部を乗り越えるように前記当接部を案内する乗り越え案内部を有する、
ことを特徴とする、請求項28に記載の外装装着構成。
The fourth engagement portion is configured such that when the third engagement portion relatively moves in the other direction and engages with the fourth engagement portion, the third engagement portion becomes the fourth engagement portion. Having a ride-over guide portion for guiding the contact portion so as to get over
The exterior mounting configuration according to claim 28, wherein:
装置本体と、
前記装置本体内に設けられ、シートに画像を形成する画像形成部と、
請求項17乃至29のいずれか1項に記載の外装装着構成と、を備えた、
ことを特徴とする画像形成装置。
The device body;
An image forming unit provided in the apparatus main body and forming an image on a sheet;
An exterior mounting configuration according to any one of claims 17 to 29,
An image forming apparatus.
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