JP5398169B2 - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

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JP5398169B2
JP5398169B2 JP2008123237A JP2008123237A JP5398169B2 JP 5398169 B2 JP5398169 B2 JP 5398169B2 JP 2008123237 A JP2008123237 A JP 2008123237A JP 2008123237 A JP2008123237 A JP 2008123237A JP 5398169 B2 JP5398169 B2 JP 5398169B2
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opening
closing door
locking portion
main body
image forming
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JP2009271408A (en
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尚吾 宮川
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Canon Inc
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Canon Inc
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本発明は、装置本体に対して開閉可能な開閉ドアを有する画像形成装置に関する。   The present invention relates to an image forming apparatus having an opening / closing door that can be opened and closed with respect to an apparatus main body.

従来、画像形成装置の筺体には、消耗品の交換、または紙詰まりの処理等を行う為の開閉ドアが形成されている。図９に、開閉ドアを有する従来の画像形成装置の概略斜視図を示す。   2. Description of the Related Art Conventionally, an opening / closing door for exchanging consumables or handling a paper jam has been formed on a housing of an image forming apparatus. FIG. 9 is a schematic perspective view of a conventional image forming apparatus having an opening / closing door.

図９に示す従来の画像形成装置には、装置本体１の下部に複数のシート材を積載する給送トレイ２が設けられ、装置本体１の上面には画像形成済みのシート材が排出される排出トレイ３が設けられている。また、装置本体１の筺体には、開閉ドア４が形成されており、開閉ドア４は、回転軸４ａを回転中心として図中矢印方向に開閉可能に構成されている。   The conventional image forming apparatus shown in FIG. 9 is provided with a feed tray 2 on which a plurality of sheet materials are stacked at the lower part of the apparatus main body 1, and the image-formed sheet material is discharged on the upper surface of the apparatus main body 1. A discharge tray 3 is provided. In addition, an opening / closing door 4 is formed in the housing of the apparatus main body 1, and the opening / closing door 4 is configured to be openable / closable in the direction of the arrow in the figure with the rotation shaft 4a as the center of rotation.

さらに、開閉ドア４の内側面の左右両端部（図９中黒丸部）には係止部５ａ、５ｂが設けられている。開閉ドア４を閉じる際に、開閉ドア４の係止部５ａ、５ｂが装置本体１に係止されることで、開閉ドア４を装置本体１に対して閉じた状態にすることができる。なお、開閉ドアに磁石を設け、磁力を利用して開閉動作を行う構成、または開閉ドアにハンドル部を設け、ハンドル部の操作と連動させて開閉動作を行う構成も知られている。   Furthermore, locking portions 5a and 5b are provided at both left and right end portions (black circle portions in FIG. 9) of the inner side surface of the open / close door 4. When the opening / closing door 4 is closed, the locking portions 5 a and 5 b of the opening / closing door 4 are locked to the apparatus main body 1, so that the opening / closing door 4 can be closed with respect to the apparatus main body 1. A configuration in which a magnet is provided in the open / close door and an open / close operation is performed using magnetic force, or a configuration in which a handle portion is provided in the open / close door and the open / close operation is performed in conjunction with the operation of the handle portion is also known.

開閉ドア４を開く場合は、ユーザが開閉ドア４に形成された把持部４ｂを操作し、開閉ドア４の係止部５ａ、５ｂの係止状態を解除することで、開閉ドア４を開くことが出来る。図１０に、開閉ドア４が閉じて、開閉ドア４の係止部５ａ、５ｂが装置本体１の係止部６ａ、６ｂによって係止された状態の概略構成を示す。   When opening the opening / closing door 4, the user opens the opening / closing door 4 by operating the grip portion 4 b formed on the opening / closing door 4 and releasing the locking state of the locking portions 5 a, 5 b of the opening / closing door 4. I can do it. FIG. 10 shows a schematic configuration in a state where the opening / closing door 4 is closed and the locking portions 5a, 5b of the opening / closing door 4 are locked by the locking portions 6a, 6b of the apparatus main body 1.

しかしながら、かかる構成の画像形成装置では、開閉ドア４の両端部に設けられた係止部５ａ、５ｂのうち、例えば一方の係止部５ａのみが装置本体１の係止部６ａに係止され、もう一方の係止部５ｂは、装置本体に係止されない状態が生じる虞がある。この状態を、開閉ドア４の「片閉まり」と称する。   However, in the image forming apparatus configured as described above, for example, only one of the locking portions 5a of the locking portions 5a and 5b provided at both ends of the opening / closing door 4 is locked to the locking portion 6a of the apparatus main body 1. The other locking portion 5b may not be locked to the apparatus main body. This state is referred to as “single closing” of the open / close door 4.

「片閉まり」は、開閉ドア４を閉じる際に、開閉ドア４の一方の端部のみをユーザが押圧する場合に多く生じる。特に、近年は軽量化、コストダウン等を目的として、開閉ドア４が薄型化されており、このような薄型化された（剛性の低い）開閉ドア４を用いる場合は「片閉まり」が生じやすい。   The “single closing” often occurs when the user presses only one end of the opening / closing door 4 when closing the opening / closing door 4. In particular, in recent years, the opening / closing door 4 has been thinned for the purpose of weight reduction, cost reduction, and the like, and when such a thin (low rigidity) opening / closing door 4 is used, “one-sided closure” tends to occur. .

図１１を参照して、「片閉まり」が生じるメカニズムについて説明する。図１１に示すように、ユーザが開閉ドア４の一方の端部の外側面をＦ１の力で押圧すると、その端部に形成されている係止部５ａは、装置本体１の係止部６ａに係止される。しかし、開閉ドア４の一方の端部のみが押圧されることで、開閉ドア４には、ねじれ力Ｔが生じてしまうので、もう一方の係止部５ｂがねじれ力Ｔによる反力Ｆ２を受けてしまう。   With reference to FIG. 11, a mechanism that causes “single closing” will be described. As shown in FIG. 11, when the user presses the outer surface of one end portion of the opening / closing door 4 with the force of F <b> 1, the locking portion 5 a formed at the end portion is locked to the locking portion 6 a of the apparatus main body 1. It is locked to. However, since only one end portion of the opening / closing door 4 is pressed, a torsional force T is generated in the opening / closing door 4, so that the other locking portion 5 b receives a reaction force F <b> 2 due to the torsional force T. End up.

そして、反力Ｆ２を受けることにより、もう一方の係止部５ｂは装置本体の係止部６ｂに係止されることが出来ない。つまり、開閉ドア４の一方の係止部５ａのみが係止され、もう一方の係止部５ｂが係止されない「片閉まり」の状態になってしまう。なお、このねじれ力Ｔは、開閉ドア４の剛性が低いほど大きくなるので、薄型化された開閉ドア４を用いる場合は「片閉まり」が生じやすくなる。また、一旦「片閉まり」の状態になった開閉ドア４は、開閉ドア４の剛性が低い場合は係止された方の係止部５ａの係止状態を解除す
ることが困難であるので、「片閉まり」の状態が維持されることになる。 By receiving the reaction force F2, the other locking portion 5b cannot be locked to the locking portion 6b of the apparatus main body. In other words, only one locking portion 5a of the opening / closing door 4 is locked, and the other locking portion 5b is not locked. Since the twisting force T increases as the rigidity of the opening / closing door 4 decreases, “one-sided closing” tends to occur when the opening / closing door 4 having a reduced thickness is used. In addition, when the opening / closing door 4 is once closed, it is difficult to release the locked state of the locked portion 5a when the opening / closing door 4 has low rigidity. The “single-closed” state is maintained.

このような「片閉まり」の状態になった場合に装置本体が画像形成動作を開始しないように、「片閉まり」の状態を検知する検知手段を備える画像形成装置が提案されている。特許文献１には、インタロックスイッチと弾性部材を組み合わせ、「片閉まり」が生じてもインタロックスイッチが切れるようにする技術が開示されている。   In order to prevent the apparatus main body from starting an image forming operation in such a “single-closed” state, an image forming apparatus including a detecting unit that detects the “single-closed” state has been proposed. Patent Document 1 discloses a technique in which an interlock switch and an elastic member are combined so that the interlock switch is turned off even when “one-sided closure” occurs.

また特許文献２には、開閉ドアの両端部と中央部のそれぞれに爪部材を計３つ設け、中央部の爪部材が装置本体に係止されない状態では、両端部の爪部材のいずれも装置本体に係止されることが不可能な構成が提案されている。さらに、開閉ドア４には把持部が設けられ、把持部の操作と係止状態の解除を連動させる構成が提案されている。
特開２００６−５３１９３号公報 特開２０００−９８６８１号公報 In Patent Document 2, a total of three claw members are provided at each of the both end portions and the central portion of the open / close door. A configuration that cannot be locked to the main body has been proposed. Further, a configuration has been proposed in which the opening / closing door 4 is provided with a gripping portion, and the operation of the gripping portion is interlocked with the release of the locked state.
JP 2006-53193 A JP 2000-98681 A

しかしながら上記従来の画像形成装置では以下の課題を生じる。   However, the conventional image forming apparatus has the following problems.

「片閉まり」の状態を検知する検知手段を画像形成装置に別途設ける場合は、製造コストの増加、装置本体の大型化につながってしまう。また、開閉ドアに設けた把持部の操作と係止解除を連動させる場合は、連動機構を設ける必要があるので開閉ドアを薄型化することが困難になる。さらに、開閉ドアが大きい場合は、当該連動機構に要する部品も大型化してしまうので、製造コストの増大を招いてしまう。   If the image forming apparatus is separately provided with detection means for detecting the “single-closed” state, this leads to an increase in manufacturing cost and an increase in the size of the apparatus main body. Further, when the operation of the gripping portion provided on the opening / closing door is interlocked with the unlocking, it is necessary to provide an interlocking mechanism, so that it is difficult to make the opening / closing door thin. Furthermore, when the open / close door is large, the parts required for the interlocking mechanism are also enlarged, resulting in an increase in manufacturing cost.

すなわち従来では、軽量化、コストダウン等を目的として開閉ドアを薄型化した場合であっても、簡易かつ安価な構成で「片閉まり」自体の発生を防止することが可能な画像形成装置は提案されていない。   That is, conventionally, an image forming apparatus capable of preventing the occurrence of “single-closure” itself with a simple and inexpensive configuration even when the opening / closing door is thinned for the purpose of weight reduction, cost reduction, and the like has been proposed. It has not been.

そこで上記現状に鑑みて本発明は、薄型化された開閉ドアが用いられる場合であっても、簡易かつ安価な構成で「片閉まり」の発生を防止することが可能な画像形成装置を提供することを目的とする。   Accordingly, in view of the above situation, the present invention provides an image forming apparatus capable of preventing the occurrence of “single closure” with a simple and inexpensive configuration even when a thin open / close door is used. For the purpose.

上記目的を達成するために本発明にあっては、
画像形成を行う部材を収容する装置本体に対して回転して装置本体内部を開閉可能な開閉ドアを有し、前記開閉ドアは、回転軸方向に関して、両端部に配置され、前記開閉ドアが装置本体に閉じた状態において装置本体に係止される第１の係止部と第２の係止部と、前記第１の係止部と前記第２の係止部との間に配置され、先端に斜面が形成された突き当て部と、を備え、
前記開閉ドアを閉じる際は、前記第１の係止部と前記第２の係止部の少なくとも一方が装置本体に係止される前に、前記突き当て部の斜面が装置本体の被突き当て部材に突き当たり、前記開閉ドアの閉じ動作に伴って、前記突き当て部が前記被突き当て部材を前記突き当て部の移動方向と略直交する方向に移動させることで、前記開閉ドアが閉じ方向に移動し、前記第１の係止部、及び、前記第２の係止部を装置本体に係止させることが可能な画像形成装置において、
前記開閉ドアを閉じた状態で装置本体に係止される爪部が、前記第１の係止部と前記第２の係止部のそれぞれに形成されており、前記爪部の先端に形成された先端斜面の傾斜角は、前記突き当て部の斜面の傾斜角よりも小さいことを特徴とする。 In order to achieve the above object, the present invention provides:
An open / close door that can be opened and closed with respect to the apparatus main body by rotating with respect to the apparatus main body that accommodates an image forming member, and the open / close doors are disposed at both ends with respect to the rotation axis direction. Disposed between the first locking portion and the second locking portion, which are locked to the apparatus main body in a state closed to the main body, and between the first locking portion and the second locking portion, An abutting portion having a slope formed at the tip,
When closing the open / close door, before the at least one of the first locking portion and the second locking portion is locked to the apparatus main body, the inclined surface of the abutting section is abutted against the apparatus main body. Abutting on the member, and with the closing operation of the opening / closing door, the abutting portion moves the abutted member in a direction substantially orthogonal to the moving direction of the abutting portion, so that the opening / closing door is moved in the closing direction. In the image forming apparatus capable of moving and locking the first locking portion and the second locking portion to the apparatus main body,
A claw portion that is locked to the apparatus main body with the opening / closing door closed is formed in each of the first locking portion and the second locking portion, and is formed at the tip of the claw portion. The inclination angle of the tip inclined surface is smaller than the inclination angle of the inclined surface of the abutting portion.

本発明によれば、薄型化された開閉ドアが用いられる場合であっても、簡易かつ安価な構成で「片閉まり」の発生を防止することが可能な画像形成装置を提供することができる。   According to the present invention, it is possible to provide an image forming apparatus capable of preventing the occurrence of “single closing” with a simple and inexpensive configuration even when a thin door is used.

以下に図面を参照して、この発明を実施するための最良の形態を、実施の形態に基づいて例示的に詳しく説明する。ただし、この実施の形態に記載されている構成部品の寸法、材質、形状、その相対配置などは、特に特定的な記載がない限りは、この発明の範囲をそれらのみに限定する趣旨のものではない。   The best mode for carrying out the present invention will be exemplarily described in detail below based on the embodiments with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.

[第１の実施の形態]
図１〜図３を参照して、本発明の第１の実施の形態に係る画像形成装置について説明する。 [First embodiment]
The image forming apparatus according to the first embodiment of the present invention will be described with reference to FIGS.

（画像形成装置の概略構成）
図１に本実施の形態に係る画像形成装置の外観斜視図を示す。図１に示すように、本実施の形態に係る画像形成装置１０は、装置本体の下部にシート材を複数積載する給送トレイ２０と、装置本体の上面に画像形成済みのシート材が排出される排出トレイ３０とを備えている。 (Schematic configuration of image forming apparatus)
FIG. 1 is an external perspective view of the image forming apparatus according to the present embodiment. As shown in FIG. 1, the image forming apparatus 10 according to the present exemplary embodiment has a feeding tray 20 on which a plurality of sheet materials are stacked at the lower part of the apparatus main body, and an image-formed sheet material is discharged on the upper surface of the apparatus main body. The discharge tray 30 is provided.

また、画像形成装置１０には、複数の画像形成手段（像担持体、現像ユニット、露光ユニット、定着ユニット、シート材の搬送ユニット等）が筺体内の所定の位置に収容されている。シート材に画像形成を行う際は、露光ユニットが像担持体の表面に形成した静電潜像を、現像ユニットがトナー像として現像し、それをシート材上に転写した後、定着ユニットでトナー像を定着させて排出トレイ３０に排出する。   Further, the image forming apparatus 10 accommodates a plurality of image forming means (image carrier, developing unit, exposure unit, fixing unit, sheet material transport unit, etc.) at predetermined positions in the housing. When forming an image on a sheet material, the developing unit develops the electrostatic latent image formed on the surface of the image carrier by the exposure unit as a toner image, and transfers the toner image onto the sheet material. The image is fixed and discharged to the discharge tray 30.

一般的に通紙枚数が増えると、画像形成手段を構成する上記の各部材、ユニットの中には、メンテナンス作業が必要になるものがでてくる。このメンテナンス作業には、例えば消耗部品の交換、補給等の作業が含まれる。また、画像形成プロセスの途中でシート材のジャムが生じた場合は、画像形成プロセスを一旦中止して、ジャムを取り除く必要がある。   In general, when the number of sheets to be passed increases, some of the members and units constituting the image forming means require maintenance work. This maintenance work includes work such as replacement and supply of consumable parts, for example. Further, when a sheet material jam occurs during the image forming process, it is necessary to temporarily stop the image forming process and remove the jam.

このようなメンテナンス作業、ジャムの処理等を、ユーザが容易に行えるようにするために、画像形成装置の筺体には、装置本体に対して開閉自在な開閉ドア４０が設けられている。これにより、ユーザがメンテナンス作業、ジャム処理を行う場合の作業スペースが確保されるので、ユーザビリティの向上につながる。なお、装置本体の軽量化、コストダウンを目的として、本実施の形態における開閉ドア４０は薄型化されており、よって、開閉ドア４０の剛性は低くなっている。   In order to allow the user to easily perform such maintenance work, jam handling, and the like, the housing of the image forming apparatus is provided with an opening / closing door 40 that can be opened and closed with respect to the apparatus main body. As a result, a work space is secured when the user performs maintenance work and jam processing, leading to improved usability. For the purpose of reducing the weight of the apparatus main body and reducing the cost, the opening / closing door 40 in the present embodiment is thinned, and thus the rigidity of the opening / closing door 40 is low.

本実施の形態における開閉ドア４０は、装置本体の筺体の一部をなしており、給送トレイ２０の上方に設けられた回転軸４０ａを中心として、図１中矢印方向に開くことが出来る。また、開閉ドア４０の外側面には把持部４０ｂが設けられており、開閉ドア４０を開く際は、ユーザが把持部４０ｂを手前に引くことで開閉ドア４０を開くことができる。   The open / close door 40 according to the present embodiment forms a part of the casing of the apparatus main body, and can be opened in the direction of the arrow in FIG. 1 around the rotating shaft 40 a provided above the feeding tray 20. In addition, a gripping portion 40b is provided on the outer surface of the opening / closing door 40. When opening the opening / closing door 40, the user can open the opening / closing door 40 by pulling the gripping portion 40b forward.

また、開閉ドア４０の上端部近傍の内側面の左右両端部近傍には、係止部５０ａ（第１の係止部）、５０ｂ（第２の係止部）が設けられており、さらに係止部５０ａと５０ｂの間（略中央部）には、突き当て部６０が設けられている。突き当て部６０は、開閉ドア４０の把持部４０ｂと略同一の位置に形成されている。また、図１中の黒丸部は、係止部５０ａ、５０ｂ、突き当て部６０の位置を示すものである。係止部５０ａ、５０ｂは、開閉ドア４０を閉じた状態で、後に説明する装置本体側に設けられた係止部７０ａ、７０ｂに
係止されるものである。 Further, locking portions 50a (first locking portions) and 50b (second locking portions) are provided in the vicinity of both left and right end portions of the inner side surface in the vicinity of the upper end portion of the opening / closing door 40. An abutting portion 60 is provided between the stop portions 50a and 50b (substantially central portion). The abutting portion 60 is formed at substantially the same position as the grip portion 40 b of the opening / closing door 40. Moreover, the black circle part in FIG. 1 shows the position of the latching | locking parts 50a and 50b and the butting | jumping part 60. FIG. The locking portions 50a and 50b are locked to locking portions 70a and 70b provided on the apparatus body side, which will be described later, with the open / close door 40 closed.

（開閉ドア及び装置本体の係止部の構成）
図２、３を参照して、開閉ドア４０の係止部５０ａ、５０ｂ、突き当て部６０、及び装置本体に設けられる係止部７０ａ、７０ｂ、被突き当て部材であるスライド部材８２の構成について説明する。図２は、開閉ドア４０の係止部５０ａ、５０ｂ、突き当て部６０が装置本体に係止された状態を示し、図３は、ユーザが開閉ドア４０の端部のみを押圧して、突き当て部６０がスライド部材８２に突き当たっている状態を示すものである。 (Structure of the opening / closing door and the locking part of the device body)
With reference to FIGS. 2 and 3, the configuration of the locking portions 50a and 50b of the opening / closing door 40, the abutting portion 60, the locking portions 70a and 70b provided in the apparatus main body, and the slide member 82 as the abutted member. explain. FIG. 2 shows a state in which the locking portions 50a and 50b and the abutting portion 60 of the opening / closing door 40 are locked to the apparatus main body, and FIG. The state where the abutting portion 60 is in contact with the slide member 82 is shown.

図２、３に示すように、本実施の形態における開閉ドア４０の係止部５０ａ、５０ｂ、突き当て部６０は、開閉ドア４０の内側面から装置本体側へ向かう凸形状を有しており、係止部５０ａ、５０ｂの先端には、爪部５１ａ、５１ｂが形成されている。なお、係止部５０ａ、５０ｂ、突き当て部６０は、開閉ドア４０を閉じる際に、突き当て部６０がスライド部材８２に最初に突き当たるように構成されている。すなわち、本実施の形態では、突き当て部６０の高さが係止部５０ａ、５０ｂと比較して最も高くなるように構成されている。   As shown in FIGS. 2 and 3, the locking portions 50 a and 50 b and the abutting portion 60 of the open / close door 40 in the present embodiment have a convex shape from the inner side surface of the open / close door 40 toward the apparatus main body. Claw portions 51a and 51b are formed at the tips of the locking portions 50a and 50b. The locking portions 50a and 50b and the abutting portion 60 are configured such that the abutting portion 60 first abuts against the slide member 82 when the opening / closing door 40 is closed. That is, in this embodiment, the height of the abutting portion 60 is configured to be the highest as compared with the locking portions 50a and 50b.

爪部５１ａには、開閉ドア４０が閉じる方向に傾斜する先端斜面５２ａ、先端斜面５２ａとは逆方向に傾斜する後端斜面５３ａが形成されている。同様に爪部５１ｂにも、開閉ドア４０が閉じる方向に傾斜する先端斜面５２ｂ、先端斜面５２ｂとは逆方向に傾斜する後端斜面５３ｂが形成されている。なお、先端斜面５２ａ、５２ｂの傾斜角を５２θとする。   The claw portion 51a is formed with a front end slope 52a that inclines in the closing direction of the open / close door 40, and a rear end slope 53a that inclines in the opposite direction to the front end slope 52a. Similarly, the claw portion 51b is also formed with a front end slope 52b that inclines in the closing direction of the open / close door 40 and a rear end slope 53b that inclines in the opposite direction to the front end slope 52b. Note that the inclination angle of the tip slopes 52a, 52b is 52θ.

一方、突き当て部６０の先端側には、開閉ドア４０が閉じる方向に傾斜する先端側の斜面６２、先端側の斜面６２とは反対側に設けられ、斜面６２とは逆方向に傾斜する後端側の斜面６３が設けられている。さらに、斜面６２と斜面６３に接続する平坦部６４が形成されている。なお、斜面６２の傾斜角を６２θ、斜面６３の傾斜角を６３θとする。   On the other hand, the front end side of the abutment portion 60 is provided on the side opposite to the front end side inclined surface 62 and the front end side inclined surface 62 which inclines in the closing direction of the opening / closing door 40, and is inclined in the opposite direction to the inclined surface 62. An end-side slope 63 is provided. Further, a flat portion 64 connected to the slope 62 and the slope 63 is formed. Note that the inclination angle of the slope 62 is 62θ, and the inclination angle of the slope 63 is 63θ.

また、装置本体には、上述した開閉ドア４０の係止部５０ａ、５０ｂを係止する係止部７０ａ、７０ｂ、さらに、突き当て部６０が突き当たるスライド部材８２が設けられている。   The apparatus main body is provided with locking portions 70a and 70b for locking the locking portions 50a and 50b of the opening / closing door 40 described above, and a slide member 82 against which the butting portion 60 abuts.

装置本体側の係止部７０ａは、付勢バネ７１ａと、付勢バネ７１ａに接続されるスライド部材７２ａを備え、付勢バネ７１ａがスライド部材７２ａを付勢し、スライド部材７２ａを開閉ドア４０の開閉方向と略直交する方向に付勢する。なお、スライド部材７２ａの先端には、上述した後端斜面５３ａに倣う斜面７３ａと、斜面７３ａと反対方向に傾斜する斜面７４ａが形成されている。   The locking portion 70a on the apparatus main body side includes an urging spring 71a and a slide member 72a connected to the urging spring 71a. The urging spring 71a urges the slide member 72a, and the slide member 72a is connected to the opening / closing door 40. Is urged in a direction substantially perpendicular to the opening / closing direction of. Note that a slope 73a that follows the rear end slope 53a and a slope 74a that slopes in the opposite direction to the slope 73a are formed at the tip of the slide member 72a.

装置本体側の係止部７０ｂは、付勢バネ７１ｂと、付勢バネ７１ｂに接続されるスライド部材７２ｂを備え、付勢バネ７１ｂがスライド部材７２ｂを付勢し、スライド部材７２ｂを突き当て部６０の移動方向と略直交する方向に付勢する。なお、スライド部材７２ｂの先端には、上述した後端斜面５３ｂに倣う斜面７３ｂと、斜面７３ｂと反対方向に傾斜する斜面７４ｂが形成されている。   The locking portion 70b on the apparatus main body side includes an urging spring 71b and a slide member 72b connected to the urging spring 71b. The urging spring 71b urges the slide member 72b, and abuts against the slide member 72b. It is urged in a direction substantially orthogonal to the moving direction of 60. Note that a slope 73b that follows the rear end slope 53b described above and a slope 74b that slopes in the opposite direction to the slope 73b are formed at the tip of the slide member 72b.

突き当て部６０が突き当たるスライド部材８２は、付勢バネ８１に接続され、付勢バネ８１によって、突き当て部６０の移動方向と略直交する方向に付勢される。なお、スライド部材８２の先端には、上述した後端斜面６３に倣う斜面８３と、斜面８３と反対方向に傾斜する斜面８４が形成されている。   The slide member 82 against which the abutting portion 60 abuts is connected to the urging spring 81 and is urged by the urging spring 81 in a direction substantially orthogonal to the moving direction of the abutting portion 60. Note that a slope 83 that follows the rear end slope 63 described above and a slope 84 that slopes in the opposite direction to the slope 83 are formed at the tip of the slide member 82.

かかる構成によると、開閉ドア４０を装置本体に対して閉じると、スライド部材７２ａ
、７２ｂ、８２が付勢バネ７１ａ、７１ｂ、８１に付勢されることで、開閉ドア４０の係止部５０ａ、５０ｂ、突き当て部６０が図２に示す状態で係止されることになる。よって、一旦開閉ドア４０を閉じると、その係止状態が保持され続けることになる。そしてこの係止状態は、ユーザが開閉ドア４０の把持部４０ｂを操作することで解除される。 According to such a configuration, when the open / close door 40 is closed with respect to the apparatus main body, the slide member 72a.
72b and 82 are urged by the urging springs 71a, 71b and 81, so that the locking portions 50a and 50b and the abutting portion 60 of the open / close door 40 are locked in the state shown in FIG. . Therefore, once the open / close door 40 is closed, the locked state is maintained. The locked state is released when the user operates the grip portion 40b of the open / close door 40.

（片閉まりを防止する構成）
従来、特に開閉ドアが薄型化された場合は、ユーザが開閉ドアの一方の端部を押圧して開閉ドアを閉じると、開閉ドアの一方の端部のみが装置本体に係止される「片閉まり」が生じてしまうことは上記で説明した。これに対し、本実施の形態における開閉ドア４０では、ユーザが一方の端部を押圧して開閉ドア４０を閉じる場合でも、「片閉まり」を生じるおそれがない。以下、本実施の形態における「片閉まりを防止する構成」について説明する。 (Configuration to prevent one-sided closure)
Conventionally, particularly when the opening / closing door is thinned, when the user presses one end of the opening / closing door to close the opening / closing door, only one end of the opening / closing door is locked to the apparatus body. As described above, the occurrence of “closing” occurs. On the other hand, in the opening / closing door 40 according to the present embodiment, even when the user closes the opening / closing door 40 by pressing one end portion, there is no possibility of “single closing”. Hereinafter, the “configuration for preventing single closing” in the present embodiment will be described.

図３に、ユーザが開閉ドア４０の一方の端部を押圧して開閉ドア４０を閉じる状態を示す。本実施の形態では、ユーザが開閉ドア４０の一方の端部をＦ１の力で押圧すると、まず最初に、開閉ドア４０の突き当て部６０の先端斜面６２が待機位置にあるスライド部材８２の斜面８４に接触する。   FIG. 3 shows a state in which the user presses one end of the opening / closing door 40 and closes the opening / closing door 40. In the present embodiment, when the user presses one end portion of the opening / closing door 40 with the force F1, first, the tip inclined surface 62 of the abutment portion 60 of the opening / closing door 40 is the inclined surface of the slide member 82 in the standby position. 84 is contacted.

スライド部材８２と突き当て部６０が接触すると、突き当て部６０の先端側の斜面６２に対して、付勢バネ８１の作用によってＦ２の力（開閉ドア４０を押し戻す方向の力）が働く。なお、突き当て部６０が受けるＦ２の力の大きさは、先端側の斜面６２の傾斜角６２θによって調節可能である。   When the slide member 82 and the abutting part 60 come into contact with each other, an F2 force (a force in a direction to push back the opening / closing door 40) is applied to the inclined surface 62 on the distal end side of the abutting part 60 by the action of the biasing spring 81. Note that the magnitude of the force F2 received by the abutting portion 60 can be adjusted by the inclination angle 62θ of the slope 62 on the tip side.

そしてＦ２の力が突き当て部６０に働いている状態では、突き当て部６０は、Ｆ２の力に抗してスライド部材８２を押し込んで開閉ドア４０が閉じる方向に進むことができない。つまり、開閉ドア４０の剛性が低いので、突き当て部６０はスライド部材８２に突き当たった状態で停止し、その後はねじれ力Ｔによって、開閉ドア４０が突き当て部６０の付け根を支点に変形することになる。   In a state where the force of F2 is applied to the abutting portion 60, the abutting portion 60 cannot push the slide member 82 against the force of F2 and advance in the direction in which the open / close door 40 is closed. That is, because the rigidity of the opening / closing door 40 is low, the abutting portion 60 stops in a state where it abuts against the slide member 82, and thereafter the opening / closing door 40 is deformed with the base of the abutting portion 60 as a fulcrum by the twisting force T. become.

このように本実施の形態では、ユーザが開閉ドア４０の一方の端部を押圧した場合には、開閉ドア４０の間に位置する突き当て部６０がスライド部材８２を移動させることがない。さらに、開閉ドア４０が図３のように変形し、係止部５０ａのみが係止部７０ａに係止される「片閉まり」の状態になって開閉ドア４０の押圧を中止しても、開閉ドア４０のねじれ力Ｔにより、開閉ドア４０は元の形状に戻ろうとするので、「片閉まり」が解除される。   As described above, in the present embodiment, when the user presses one end of the opening / closing door 40, the abutting portion 60 positioned between the opening / closing door 40 does not move the slide member 82. Further, even when the opening / closing door 40 is deformed as shown in FIG. 3 and only the locking portion 50a is locked to the locking portion 70a, and the door 40 is stopped, the opening / closing door 40 can be opened and closed. Since the opening / closing door 40 tries to return to the original shape by the twisting force T of the door 40, “one-sided closing” is released.

つまり、「片閉まり」の状態から開閉ドア４０が元の形状に戻ろうとする際に生じるねじれ力Ｔは、係止部７０ａが係止部５０ａを係止している力よりも大きい。よって、ユーザの操作を必要とせず、開閉ドア４０の変形を利用して、「片閉まり」を解除することができる。   That is, the twisting force T generated when the open / close door 40 tries to return to the original shape from the “single-closed” state is larger than the force with which the locking portion 70 a locks the locking portion 50 a. Therefore, it is possible to cancel “single-closed” by utilizing the deformation of the opening / closing door 40 without requiring any user operation.

以上より、本実施の形態に係る画像形成装置によれば、ユーザが開閉ドア４０の一方の端部を押圧した場合であっても、開閉ドア４０が「片閉まり」の状態となることを防ぐことが可能である。なお、上記ではユーザが開閉ドア４０の係止部５０ａの方の端部を押圧した場合について説明したが、もう一方の端部（係止部５０ｂの方）を押圧する場合であっても、「片閉まり」の状態を防ぐことは可能である。   As described above, according to the image forming apparatus according to the present embodiment, even when the user presses one end of the opening / closing door 40, the opening / closing door 40 is prevented from being in a “single-closed” state. It is possible. In addition, although the above demonstrated the case where the user pressed the edge part of the direction of the latching | locking part 50a of the opening / closing door 40, even if it is a case where the other edge part (the direction of the latching | locking part 50b) is pressed, It is possible to prevent the “single-closed” state.

また、ユーザが開閉ドア４０の略中央部（把持部４０ｂ近傍）を押圧する場合は、突き当て部６０がスライド部材８２から受ける力Ｆ２に抗して、スライド部材８２を押しのけて開閉ドア４０を閉じることができる。   Further, when the user presses the substantially central portion (near the gripping portion 40 b) of the opening / closing door 40, the abutting portion 60 resists the force F <b> 2 received from the sliding member 82 and pushes the sliding member 82 to move the opening / closing door 40. Can be closed.

同様に、開閉ドア４０の係止部５０ａ、５０ｂもスライド部材７２ａ、７２ｂを押しのけて、スライド部材７２ａ、７２ｂに係止される。よって、ユーザが開閉ドア４０の略中央部を押圧する場合は、開閉ドア４０を装置本体に確実に閉じることができる。   Similarly, the locking portions 50a and 50b of the open / close door 40 are also locked to the slide members 72a and 72b by pushing the slide members 72a and 72b. Therefore, when the user presses the substantially center portion of the opening / closing door 40, the opening / closing door 40 can be reliably closed to the apparatus main body.

なお、本実施の形態では、開閉ドア４０の突き当て部６０の先端側の斜面６２の傾斜角６２θが、係止部５０ａ、５０ｂの先端斜面５２ａ、５２ｂの傾斜角５２θよりも大きくなるようにした（６２θ＞５２θ）。   In the present embodiment, the inclination angle 62θ of the inclined surface 62 on the distal end side of the abutment portion 60 of the opening / closing door 40 is larger than the inclination angle 52θ of the distal inclined surfaces 52a, 52b of the locking portions 50a, 50b. (62θ> 52θ).

これにより、突き当て部６０に対しては、より大きな反力Ｆ２を付与することが可能になり、一方で係止部５０ａ、５０ｂに対しては、スライド部材７０ａ、７０ｂから受ける反力の大きさをＦ２より小さくすることができる。これは、係止部５０ａ、５０ｂに大きな反力が働くと、開閉ドア４０を閉じるために要するユーザの押圧力も大きくなってしまうので、それによってユーザの操作性が低下することを防ぐためである。   As a result, a larger reaction force F2 can be applied to the abutting portion 60, while the reaction force received from the slide members 70a and 70b is large on the locking portions 50a and 50b. The thickness can be made smaller than F2. This is because when a large reaction force acts on the locking portions 50a and 50b, the user's pressing force required to close the open / close door 40 also increases, thereby preventing the user's operability from being lowered. is there.

また、本実施の形態では、突き当て部６０の先端側の斜面６２の傾斜角６２θを、後端側の斜面６３の傾斜角６３θよりも大きくした。さらに、先端側の傾斜面６２と後端側の斜面６３を平坦部６４で接続した。この構成によると、開閉ドア４０を開く際に、突き当て部６０がスライド部材８２から受ける力を低減させることができるので、開閉ドア４０を開くために要するユーザの力を低減させることが可能になる。   In the present embodiment, the inclination angle 62θ of the slope 62 on the front end side of the abutting portion 60 is made larger than the inclination angle 63θ of the slope 63 on the rear end side. Further, the inclined surface 62 on the front end side and the inclined surface 63 on the rear end side are connected by a flat portion 64. According to this configuration, when the opening / closing door 40 is opened, the force received by the abutment portion 60 from the slide member 82 can be reduced, so that the user's force required to open the opening / closing door 40 can be reduced. Become.

また、開閉ドア４０を閉じた状態では、スライド部材８２が突き当て部６０の後端側の斜面６３を係止するので（図２参照）、開閉ドア４０に反りがある場合でも、開閉ドア４０を閉じた状態ではそりを矯正することができる。   In addition, when the open / close door 40 is closed, the slide member 82 locks the slope 63 on the rear end side of the abutting portion 60 (see FIG. 2), so even if the open / close door 40 is warped, the open / close door 40. The warp can be corrected in the closed state.

また、本実施の形態では、スライド部材８２から突き当て部６０に働く反力Ｆ２の大きさを、先端側の斜面６２の傾斜角６２θによって調節している。すなわち、付勢バネ等で反力Ｆ２の大きさを調節する構成ではないので、装置本体に設けられた係止部７０ａ、７０ｂに、同一の付勢バネ、スライド部材を用いることができる。よって、製造コストを抑えることが可能になる。   Further, in the present embodiment, the magnitude of the reaction force F2 that acts on the abutting portion 60 from the slide member 82 is adjusted by the inclination angle 62θ of the inclined surface 62 on the distal end side. That is, since it is not the structure which adjusts the magnitude | size of reaction force F2 with an urging | biasing spring etc., the same urging | biasing spring and a slide member can be used for the latching | locking part 70a, 70b provided in the apparatus main body. Therefore, it is possible to reduce the manufacturing cost.

また、本実施の形態では、開閉ドア４０に爪部６０を設け、装置本体に係止部７０ａ、７０ｂ、スライド部材８２を設ける構成としたが、本発明に係る画像形成装置の構成はこれに限られるものではない。すなわち、本実施の形態とは逆に、開閉ドア４０に付勢バネ、スライド部材を配置し、装置本体に爪部を設ける構成であってもよい。   In the present embodiment, the opening / closing door 40 is provided with the claw portion 60 and the apparatus main body is provided with the locking portions 70a and 70b and the slide member 82. However, the configuration of the image forming apparatus according to the present invention is the same. It is not limited. That is, contrary to the present embodiment, a configuration may be adopted in which an urging spring and a slide member are arranged on the opening / closing door 40 and a claw portion is provided on the apparatus main body.

以上より、本実施の形態によれば、薄型化された開閉ドアが用いられる場合であっても、簡易かつ安価な構成で「片閉まり」の発生を防止することが可能な画像形成装置を提供することが可能になる。   As described above, according to the present embodiment, there is provided an image forming apparatus capable of preventing the occurrence of “single closure” with a simple and inexpensive configuration even when a thin open / close door is used. It becomes possible to do.

［第２の実施の形態］
図４、５を参照して、本発明の第２の実施の形態に係る画像形成装置について説明する。なお、（画像形成装置の概略構成）に関しては上記第１の実施の形態と異なるものではないのでその説明は省略し、ここでは第１の実施の形態と異なる部分のみ説明を行う。 [Second Embodiment]
An image forming apparatus according to the second embodiment of the present invention will be described with reference to FIGS. Note that (schematic configuration of the image forming apparatus) is not different from that of the first embodiment, and thus the description thereof is omitted. Only portions different from the first embodiment are described here.

（開閉ドア及び装置本体の係止部の構成）
図４、５を参照して、開閉ドア４０の係止部５０ａ、５０ｂ、突き当て部６０、及び装置本体に設けられた係止部７０ａ、７０ｂ、スライド部材８２の構成について説明する。図４は、開閉ドア４０の係止部５０ａ、５０ｂ、突き当て部６０が、装置本体の係止部７０ａ、７０ｂに係止された状態を示し、図５は、ユーザが開閉ドア４０の端部のみを押圧
して、突き当て部６０がスライド部材８２に突き当たっている状態を示すものである。 (Structure of the opening / closing door and the locking part of the device body)
With reference to FIGS. 4 and 5, the configuration of the locking portions 50 a and 50 b of the opening / closing door 40, the butting portion 60, and the locking portions 70 a and 70 b and the slide member 82 provided in the apparatus main body will be described. 4 shows a state in which the locking portions 50a and 50b and the abutment portion 60 of the opening / closing door 40 are locked to the locking portions 70a and 70b of the apparatus main body, and FIG. Only the portion is pressed, and the abutting portion 60 is in contact with the slide member 82.

開閉ドア４０の係止部５０ａ、５０ｂには、第１の実施の形態と同様に爪部５１ａ、５１ｂが形成されており、一方で装置本体の係止部７０ａ、７０ｂには、爪部５１ａ、５１ｂの斜面に倣う斜面が形成されている。なお、本実施の形態では、装置本体の係止部７０ａ、７０ｂは付勢バネ等で付勢される構成ではなく、係止部５０ａ、５０ｂと当接することで、撓むように構成されている。   The locking portions 50a and 50b of the opening / closing door 40 are formed with claw portions 51a and 51b, as in the first embodiment, while the locking portions 70a and 70b of the apparatus main body have claw portions 51a. , 51b is formed. In the present embodiment, the locking portions 70a and 70b of the apparatus main body are not configured to be biased by a biasing spring or the like, but are configured to bend by contacting the locking portions 50a and 50b.

係止部５０ａと係止部５０ｂの間（略中央部）に形成される突き当て部６０は、先端に突入リブ６８を備えている。また、第１の実施の形態と同様に、開閉ドア４０を閉じる際に突き当て部６０が装置本体側のスライド部材８２に最初に突き当たるように構成されており、突き当て部６０の高さが係止部５０ａ、５０ｂと比較して最も高くなるように構成されている。   The abutting portion 60 formed between the locking portion 50a and the locking portion 50b (substantially central portion) includes a piercing rib 68 at the tip. Similarly to the first embodiment, the abutting portion 60 is configured to first abut against the slide member 82 on the apparatus main body side when the opening / closing door 40 is closed. It is comprised so that it may become the highest compared with the latching | locking part 50a, 50b.

突き当て部６０が突き当たるスライド部材８２は、付勢バネ８１に接続されている。そして、付勢バネ８１がスライド部材８２を付勢し、スライド部材８２を突き当て部６０の移動方向と略直交する方向に付勢している。なお、スライド部材８２の先端面は、略平坦に形成されている。   The slide member 82 against which the abutting portion 60 abuts is connected to the biasing spring 81. The urging spring 81 urges the slide member 82 and urges the slide member 82 in a direction substantially orthogonal to the moving direction of the abutment portion 60. Note that the front end surface of the slide member 82 is substantially flat.

かかる構成によると、開閉ドア４０を閉じると、係止部５０ａ、５０ｂが係止部７０ａ、７０ｂを押し込んで撓ませ、その後、爪部５１ａ、５１ｂが係止部７０ａ、７０ｂに係止される。なお、突き当て部６０は、スライド部材８２に係止されなくとも、開閉ドア４０を閉じた状態にすることは可能である。   According to this configuration, when the open / close door 40 is closed, the locking portions 50a and 50b push the locking portions 70a and 70b to bend, and then the claw portions 51a and 51b are locked to the locking portions 70a and 70b. . The abutting portion 60 can close the open / close door 40 without being locked to the slide member 82.

以上の構成によれば、開閉ドア４０の係止部５０ａ、５０ｂが装置本体の係止部７０ａ、７０ｂに係止されていれば、開閉ドア４０を確実に閉じた状態にすることができる。なお、この係止状態は、ユーザが開閉ドア４０の把持部４０ｂを操作することで解除される。   According to the above configuration, if the locking portions 50a, 50b of the opening / closing door 40 are locked to the locking portions 70a, 70b of the apparatus main body, the opening / closing door 40 can be reliably closed. This locked state is released when the user operates the grip portion 40b of the open / close door 40.

（片閉まりを防止する構成）
図５に示すようにユーザが開閉ドア４０の一方の端部をＦ１の力で押圧すると、まず最初に、突き当て部６０の突入リブ６８が待機位置にあるスライド部材８２に突き当たる。 (Configuration to prevent one-sided closure)
As shown in FIG. 5, when the user presses one end portion of the opening / closing door 40 with the force F1, first, the intrusion rib 68 of the abutment portion 60 abuts against the slide member 82 in the standby position.

スライド部材８２と突き当て部６０の突入リブ６８が突き当たると、突入リブ６８には、付勢バネ８１の作用によってＦ２の力（開閉ドア４０を押し戻す方向の力）が働く。なお、突入リブ６８が受けるＦ２の力の大きさは、突入リブ６８の斜面の傾斜角によって調節可能である。   When the slide rib 82 and the plunging rib 68 of the butting portion 60 abut, the force of F2 (force in the direction to push back the opening / closing door 40) acts on the plunging rib 68 by the action of the biasing spring 81. The magnitude of the force F2 received by the entry rib 68 can be adjusted by the inclination angle of the slope of the entry rib 68.

そしてＦ２の力が突入リブ６８に働いている状態では、突き当て部６０は、Ｆ２の力に抗してスライド部材８２を押し込んで開閉ドア４０が閉じる方向に進むことができない。つまり、開閉ドア４０の剛性が低いので、突き当て部６０はスライド部材８２に突き当たった状態で停止し、その後はねじれ力Ｔによって、開閉ドア４０が突入リブ６８の先端を支点に変形することになる。   In the state where the force of F2 is applied to the rush rib 68, the abutment portion 60 cannot push the slide member 82 against the force of F2 and advance in the direction in which the open / close door 40 is closed. That is, since the rigidity of the opening / closing door 40 is low, the abutting portion 60 stops in a state where it abuts against the slide member 82, and thereafter, the opening / closing door 40 is deformed with the tip of the entry rib 68 as a fulcrum by the twisting force T. Become.

このように本実施の形態では、ユーザが開閉ドア４０の一方の端部を押圧した場合には、開閉ドア４０の間（略中央部）に位置する突き当て部６０がスライド部材８２を押し込んで進むことがない。さらに、開閉ドア４０が図５のように変形し、係止部５０ａのみが係止部７０ａに係止される「片閉まり」の状態になって開閉ドア４０の押圧を中止しても、開閉ドア４０のねじれ力により、開閉ドア４０は元の形状に戻ろうとするので、「片閉まり」が解除される。   As described above, in the present embodiment, when the user presses one end of the opening / closing door 40, the abutting portion 60 located between the opening / closing doors 40 (substantially central portion) pushes the slide member 82. There is no progress. Further, even when the opening / closing door 40 is deformed as shown in FIG. 5 and only the locking portion 50a is locked to the locking portion 70a, and the door 40 is stopped, Since the opening / closing door 40 tries to return to the original shape by the twisting force of the door 40, “one-sided closing” is released.

つまり、「片閉まり」の状態から開閉ドア４０が元の形状に戻ろうとする際に生じるねじれ力は、係止部７０ａが係止部５０ａを係止している力よりも大きい。よって、ユーザの操作を必要とせず、開閉ドア４０の変形を利用して、「片閉まり」を解除することができる。   That is, the twisting force generated when the open / close door 40 tries to return to the original shape from the “single-closed” state is larger than the force with which the locking portion 70a locks the locking portion 50a. Therefore, it is possible to cancel “single-closed” by utilizing the deformation of the opening / closing door 40 without requiring any user operation.

以上より、本実施の形態に係る画像形成装置によれば、ユーザが開閉ドア４０の一方の端部を押圧した場合であっても、開閉ドア４０が「片閉まり」の状態となることを防ぐことが可能である。なお、上記ではユーザが開閉ドア４０の係止部５０ａの方の端部を押圧した場合について説明したが、もう一方の端部（係止部５０ｂの方）を押圧する場合であっても、「片閉まり」の状態を防ぐことは可能である。   As described above, according to the image forming apparatus according to the present embodiment, even when the user presses one end of the opening / closing door 40, the opening / closing door 40 is prevented from being in a “single-closed” state. It is possible. In addition, although the above demonstrated the case where the user pressed the edge part of the direction of the latching | locking part 50a of the opening / closing door 40, even if it is a case where the other edge part (the direction of the latching | locking part 50b) is pressed, It is possible to prevent the “single-closed” state.

また、ユーザが開閉ドア４０の略中央部（把持部４０ｂ近傍）を押圧する場合は、開閉ドア４０の突入リブ６８がスライド部材８２から受ける力Ｆ２に抗してスライド部材８２を押しのけることが可能なので、開閉ドア４０を閉じる方向に進ませることができる。   In addition, when the user presses the substantially central portion (near the gripping portion 40b) of the opening / closing door 40, the sliding member 82 can be pushed against the force F2 that the entry rib 68 of the opening / closing door 40 receives from the sliding member 82. Therefore, the opening / closing door 40 can be advanced in the closing direction.

よって、開閉ドア４０の係止部５０ａ、５０ｂが係止部７２ａ、７２ｂを撓ませて、係止部７２ａ、７２ｂに係止された状態になる。従って、ユーザが開閉ドア４０の略中央部（把持部４０ｂ）近傍を押圧する場合は、開閉ドア４０を装置本体に確実に閉じることができる。   Accordingly, the locking portions 50a and 50b of the opening / closing door 40 bend the locking portions 72a and 72b and are locked to the locking portions 72a and 72b. Therefore, when the user presses the vicinity of the substantially center portion (gripping portion 40b) of the opening / closing door 40, the opening / closing door 40 can be reliably closed to the apparatus main body.

また、本実施の形態では、スライド部材８２の先端面は略平坦に形成されているので、図４に示す状態から開閉ドア４０を開く場合は、突き当て部６０とスライド部材８２の摺動抵抗よりも大きな力でユーザは開閉ドア４０を開けばよい。従って、第１の実施の形態と比較すると比較的小さな力で開閉ドア４０を開くことができる。   Further, in the present embodiment, since the front end surface of the slide member 82 is formed to be substantially flat, when the opening / closing door 40 is opened from the state shown in FIG. The user may open the opening / closing door 40 with greater force. Therefore, the open / close door 40 can be opened with a relatively small force as compared with the first embodiment.

また、本実施の形態では、開閉ドア４０に突入リブ６８を設け、装置本体にスライド部材８２を設ける構成としたが、本発明に係る画像形成装置の構成はこれに限られるものではない。すなわち、本実施の形態とは逆に、開閉ドア４０にスライド部材８２を配置し、装置本体に突入リブ６８を設ける構成であってもよい。   In the present embodiment, the entry rib 68 is provided on the open / close door 40 and the slide member 82 is provided on the apparatus main body. However, the configuration of the image forming apparatus according to the present invention is not limited to this. In other words, contrary to the present embodiment, the slide member 82 may be disposed on the opening / closing door 40 and the entry rib 68 may be provided on the apparatus main body.

以上より、本実施の形態によれば、薄型化された開閉ドアが用いられる場合であっても、簡易かつ安価な構成で「片閉まり」の発生を防止することが可能な画像形成装置を提供することが可能になる。   As described above, according to the present embodiment, there is provided an image forming apparatus capable of preventing the occurrence of “single closure” with a simple and inexpensive configuration even when a thin open / close door is used. It becomes possible to do.

［第３の実施の形態］
図６〜８を参照して、本発明の第３の実施の形態について説明する。なお、（画像形成装置の概略構成）に関しては上記第１の実施の形態と異なるものではないのでその説明は省略し、ここでは第１の実施の形態と異なる部分のみ説明を行う。 [Third Embodiment]
A third embodiment of the present invention will be described with reference to FIGS. Note that (schematic configuration of the image forming apparatus) is not different from that of the first embodiment, and thus the description thereof is omitted. Only portions different from the first embodiment are described here.

（開閉ドア及び装置本体の係止部の構成）
本実施の形態における開閉ドア４０に形成される係止部５０ａ、５０ｂ、突き当て部６０の形状は、上記で説明した第２の実施の形態と同一である。すなわち、本実施の形態における係止部５０ａ、５０ｂは、爪部５１ａ、５１ｂを有しており、係止部５０ａと係止部５０ｂの間（略中央部）に形成される突き当て部６０は、先端に突入リブ６８を備えている。 (Structure of the opening / closing door and the locking part of the device body)
The shapes of the locking portions 50a and 50b and the abutting portion 60 formed on the open / close door 40 in the present embodiment are the same as those in the second embodiment described above. That is, the locking portions 50a and 50b in the present embodiment have claw portions 51a and 51b, and the abutting portion 60 formed between the locking portion 50a and the locking portion 50b (substantially central portion). Is provided with a piercing rib 68 at the tip.

また、装置本体に形成され、開閉ドア４０の係止部５０ａ、５０ｂを係止する係止部７０ａ、７０ｂも、上記第２の実施の形態と同一の形状である。すなわち、開閉ドア４０が閉まると、係止部５０ａ、５０ｂが係止部７０ａ、７０ｂを撓ませ、その後、爪部５１ａ
、５１ｂが係止部７０ａ、７０ｂによって係止される構成である。なお、係止部７０ａ、７０ｂは、第１の実施の形態のように、付勢バネを有する構成であってもよい。 In addition, the locking portions 70a and 70b formed on the apparatus main body and locking the locking portions 50a and 50b of the opening / closing door 40 have the same shape as the second embodiment. That is, when the opening / closing door 40 is closed, the locking portions 50a and 50b bend the locking portions 70a and 70b, and then the claw portion 51a.
, 51b are locked by the locking portions 70a, 70b. In addition, the latching | locking part 70a, 70b may be the structure which has an urging | biasing spring like 1st Embodiment.

本実施の形態では、上記構成に加え、係止部７０ａ、７０ｂと開閉ドア４０との間に、付勢バネ８１によって突き当て部６０の移動方向と略直交する方向に付勢されるスライド部材８８が設けられていることを特徴とする。さらに、スライド部材８８には、係止部５０ａ、５０ｂ、突き当て部６０のそれぞれに対応する３つの開口部１５０ａ、１５０ｂ、１６０が形成されている。   In the present embodiment, in addition to the above-described configuration, a slide member that is urged in a direction substantially orthogonal to the moving direction of the abutment portion 60 by the urging spring 81 between the locking portions 70a and 70b and the opening / closing door 40. 88 is provided. Further, the slide member 88 is formed with three openings 150a, 150b, 160 corresponding to the locking portions 50a, 50b and the abutting portion 60, respectively.

（片閉まりを防止する構成）
図８に示すように、ユーザが開閉ドア４０の一方の端部をＦ１の力で押圧すると、まず最初に、開閉ドア４０の突き当て部６０の突入リブ６８が待機位置にあるスライド部材８８に突き当たる。なお、図７（ｂ）に示すように、スライド部材８８が待機位置にある状態では、開口部１５０ａ、１５０ｂ、１６０は、係止部５０ａ、５０ｂ、突き当て部６０がそれぞれの開口部を通過可能な位置に配置されていない。 (Configuration to prevent one-sided closure)
As shown in FIG. 8, when the user presses one end portion of the opening / closing door 40 with the force F1, first, the intrusion rib 68 of the abutment portion 60 of the opening / closing door 40 is applied to the slide member 88 in the standby position. bump into. As shown in FIG. 7B, in the state where the slide member 88 is in the standby position, the openings 150a, 150b, and 160 have the engaging portions 50a and 50b, and the abutment portion 60 pass through the respective openings. Not placed in a possible position.

スライド部材８８と突き当て部６０の突入リブ６８が突き当たると、突入リブ６８には、付勢バネ８１の作用によってＦ２の力（開閉ドア４０を押し戻す方向の力）が働く。なお、突入リブ６８が受けるＦ２の力の大きさは、突入リブ６８の斜面の傾斜角によって調節可能である。   When the slide member 88 and the entry rib 68 of the abutment portion 60 abut, the force of F2 (force in the direction to push back the opening / closing door 40) is applied to the entry rib 68 by the action of the biasing spring 81. The magnitude of the force F2 received by the entry rib 68 can be adjusted by the inclination angle of the slope of the entry rib 68.

そしてＦ２の力が突入リブ６８に働いている状態では、突き当て部６０は、Ｆ２の力に抗してスライド部材８８を押し込んで開閉ドア４０が閉じる方向に進むことができない。つまり、開閉ドア４０の剛性が低いので、突き当て部６０はスライド部材８８に突き当たった状態で停止し、その後はねじれ力Ｔによって、開閉ドア４０が突入リブ６８の先端を支点に変形するからである。   In the state where the force of F2 is applied to the entry rib 68, the abutting portion 60 cannot push the slide member 88 against the force of F2 and advance in the direction in which the open / close door 40 is closed. That is, since the opening / closing door 40 has low rigidity, the abutting portion 60 stops in a state where it abuts against the slide member 88, and thereafter, the opening / closing door 40 is deformed with the tip of the entry rib 68 as a fulcrum by the twisting force T. is there.

開閉ドア４０にねじれ力Ｔが働いて変形すると、係止部５０ａの先端はスライド部材８８に突き当たった状態で停止する。この状態では係止部６０がスライド部材８８を押し込んでいないので、スライド部材８８に形成された開口部１５０ａ、１５０ｂを係止部５０ａ、５０ｂは通過することができない。   When the torsional force T acts on the opening / closing door 40 and is deformed, the tip of the locking portion 50a stops in a state where it hits the slide member 88. In this state, since the locking portion 60 does not push the slide member 88, the locking portions 50a and 50b cannot pass through the openings 150a and 150b formed in the slide member 88.

従って、本実施の形態では、ユーザが開閉ドア４０の一方の端部を押圧しても、その端部に設けられている係止部５０ａ、５０ｂがスライド部材８８の開口部１５０ａ、１５０ｂを通過することが出来ないので、「片閉まり」が発生しない。   Therefore, in the present embodiment, even when the user presses one end of the opening / closing door 40, the locking portions 50a and 50b provided at the end pass through the openings 150a and 150b of the slide member 88. “Cannot be closed” does not occur.

一方、ユーザが開閉ドア４０の略中央部（把持部４０ｂ近傍）を押圧する場合は、突き当て部６０の突入リブ６８がスライド部材８８から受ける力Ｆ２に抗して、スライド部材８８を押しのけて上方にスライドさせることが可能である。そして、スライド部材８８が移動することで、開口部１５０ａが係止部５０ａに、開口部１６０が突き当て部６０に、開口部１５０ｂが係止部５０ｂを臨む位置に配置され、図７（ａ）の状態になる。すなわち図７（ａ）に示す状態は、係止部５０ａ、５０ｂが装置本体に対して係止可能な状態といえる。   On the other hand, when the user presses the substantially center part (near the gripping part 40b) of the opening / closing door 40, the sliding member 88 is pushed against the force F2 received by the entry rib 68 of the abutting part 60 from the sliding member 88. It is possible to slide upward. Then, the slide member 88 is moved, so that the opening 150a is disposed at the engaging portion 50a, the opening 160 is disposed at the butting portion 60, and the opening 150b is disposed at the position facing the engaging portion 50b. ) State. That is, the state shown in FIG. 7A can be said to be a state in which the locking portions 50a and 50b can be locked to the apparatus main body.

よって、開口部１５０ａ、１５０ｂ、１６０を係止部５０ａ、５０ｂ、突き当り部６０が通過可能になり、開閉ドア４０がさらに進み、開閉ドア４０の係止部５０ａ、５０ｂが係止部７０ａ、７０ｂを撓ませて、係止部７０ａ、７０ｂに係止された状態になる。従って、ユーザが開閉ドア４０の略中央部（把持部４０ｂ近傍）を押圧する場合は、開閉ドア４０を装置本体に確実に閉じることができる。   Therefore, the locking portions 50a and 50b and the abutting portion 60 can pass through the openings 150a, 150b and 160, the opening and closing door 40 further advances, and the locking portions 50a and 50b of the opening and closing door 40 are locked to the locking portions 70a and 70b. Is bent to be locked to the locking portions 70a and 70b. Therefore, when the user presses the substantially central portion (near the gripping portion 40b) of the opening / closing door 40, the opening / closing door 40 can be reliably closed to the apparatus main body.

なお、装置本体には開閉ドア４０の突き当て部６０を係止する係止手段は設けられていないので、開閉ドア４０を開く際は、突き当て部６０に対して付加がかからず、ユーザは開閉ドア４０を容易に開くことができる。   Since the device main body is not provided with a locking means for locking the abutting portion 60 of the opening / closing door 40, when the opening / closing door 40 is opened, no addition is applied to the abutting portion 60, and the user Can easily open the door 40.

また、本実施の形態では、開閉ドア４０に突入リブ６８を設け、装置本体にスライド部材８８を設ける構成としたが、本発明に係る画像形成装置の構成はこれに限られるものではない。すなわち、本実施の形態とは逆に、開閉ドア４０にスライド部材８８を配置し、装置本体に突入リブ６８を設ける構成であってもよい。   In the present embodiment, the entry rib 68 is provided in the opening / closing door 40 and the slide member 88 is provided in the apparatus main body. However, the configuration of the image forming apparatus according to the present invention is not limited to this. In other words, contrary to the present embodiment, the slide member 88 may be disposed on the open / close door 40 and the entry rib 68 may be provided on the apparatus main body.

以上より、本実施の形態によれば、薄型化された開閉ドアが用いられる場合であっても、簡易かつ安価な構成で「片閉まり」の発生を防止することが可能な画像形成装置を提供することが可能になる。   As described above, according to the present embodiment, there is provided an image forming apparatus capable of preventing the occurrence of “single closure” with a simple and inexpensive configuration even when a thin open / close door is used. It becomes possible to do.

第１の実施の形態に係る画像形成装置の概略構成図。1 is a schematic configuration diagram of an image forming apparatus according to a first embodiment. 第１の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 1st Embodiment. 第１の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 1st Embodiment. 第２の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 2nd Embodiment. 第２の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 2nd Embodiment. 第３の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 3rd Embodiment. 第３の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 3rd Embodiment. 第３の実施の形態における開閉ドア及び装置本体の係止部の概略構成図。The schematic block diagram of the latching | locking part of the opening / closing door and apparatus main body in 3rd Embodiment. 従来例に係る画像形成装置の概略斜視図。FIG. 10 is a schematic perspective view of an image forming apparatus according to a conventional example. 従来例における開閉ドアが閉じた状態の概略構成図。The schematic block diagram of the state in which the opening-and-closing door in the prior art example was closed. 片閉まりが生じるメカニズムを説明する図。The figure explaining the mechanism in which a single closing occurs.

符号の説明Explanation of symbols

１０ 画像形成装置
４０ 開閉ドア
５０ａ係止部
５０ｂ係止部
５２ａ先端斜面
５２ｂ先端斜面
６０ 突き当て部
８０ スライド部材
１５０ａ開口部
１５０ｂ開口部
１６０ 開口部 DESCRIPTION OF SYMBOLS 10 Image forming apparatus 40 Opening / closing door 50a Locking part 50b Locking part 52a Tip slope 52b Tip slope 60 Abutting part 80 Slide member 150a Opening part 150b Opening part 160 Opening part

Claims (6)

画像形成を行う部材を収容する装置本体に対して回転して装置本体内部を開閉可能な開閉ドアを有し、前記開閉ドアは、回転軸方向に関して、両端部に配置され、前記開閉ドアが装置本体に閉じた状態において装置本体に係止される第１の係止部と第２の係止部と、前記第１の係止部と前記第２の係止部との間に配置され、先端に斜面が形成された突き当て部と、を備え、
前記開閉ドアを閉じる際は、前記第１の係止部と前記第２の係止部の少なくとも一方が装置本体に係止される前に、前記突き当て部の斜面が装置本体の被突き当て部材に突き当たり、前記開閉ドアの閉じ動作に伴って、前記突き当て部が前記被突き当て部材を前記突き当て部の移動方向と略直交する方向に移動させることで、前記開閉ドアが閉じ方向に移動し、前記第１の係止部、及び、前記第２の係止部を装置本体に係止させることが可能な画像形成装置において、
前記開閉ドアを閉じた状態で装置本体に係止される爪部が、前記第１の係止部と前記第２の係止部のそれぞれに形成されており、前記爪部の先端に形成された先端斜面の傾斜角は、前記突き当て部の斜面の傾斜角よりも小さいことを特徴とする画像形成装置。 An open / close door that can be opened and closed with respect to the apparatus main body by rotating with respect to the apparatus main body that accommodates an image forming member, and the open / close doors are disposed at both ends with respect to the rotation axis direction. Disposed between the first locking portion and the second locking portion, which are locked to the apparatus main body in a state closed to the main body, and between the first locking portion and the second locking portion, An abutting portion having a slope formed at the tip,
When closing the open / close door, before the at least one of the first locking portion and the second locking portion is locked to the apparatus main body, the inclined surface of the abutting section is abutted against the apparatus main body. Abutting on the member, and with the closing operation of the opening / closing door, the abutting portion moves the abutted member in a direction substantially orthogonal to the moving direction of the abutting portion, so that the opening / closing door is moved in the closing direction. In the image forming apparatus capable of moving and locking the first locking portion and the second locking portion to the apparatus main body,
A claw portion that is locked to the apparatus main body with the opening / closing door closed is formed in each of the first locking portion and the second locking portion, and is formed at the tip of the claw portion. An image forming apparatus characterized in that an inclination angle of the tip inclined surface is smaller than an inclination angle of the inclined surface of the abutting portion. 前記被突き当て部材には、前記第１の係止部、前記第２の係止部のそれぞれが突き当たって停止させられ停止部が設けられ、前記開閉ドアを閉じる際に前記突き当て部が前記被突き当て部材を移動させることで、前記停止部が前記第１の係止部及び前記第２の係止部が突き当たる位置から移動し、前記第１の係止部及び前記第２の係止部が装置本体に係止可能な状態になることを特徴とする請求項１に記載の画像形成装置。   The abutted member is provided with a stop portion that is stopped by abutting and stopping each of the first locking portion and the second locking portion, and when the opening / closing door is closed, the butting portion is By moving the abutted member, the stop portion moves from a position where the first locking portion and the second locking portion abut against each other, and the first locking portion and the second locking portion are moved. The image forming apparatus according to claim 1, wherein the portion can be locked to the apparatus main body. 前記被突き当て部材は、前記第１の係止部、前記第２の係止部がそれぞれ通過可能な第１開口部、第２開口部を備え、前記開閉ドアを閉じる際に前記突き当て部が前記被突き当て部材を移動させることで、前記第１開口部、前記第２開口部は、それぞれ前記第１の係止部、前記第２の係止部が通過可能な位置まで移動することを特徴とする請求項１又は２に記載の画像形成装置。   The abutted member includes a first opening and a second opening through which the first locking portion and the second locking portion can pass, respectively, and the abutting portion when the opening / closing door is closed When the abutting member is moved, the first opening and the second opening move to positions where the first locking portion and the second locking portion can pass, respectively. The image forming apparatus according to claim 1, wherein: 前記突き当て部には、
前記突き当て部の先端に形成された前記斜面に接続し、前記被突き当て部材の移動方向
とは略直交する平坦部が形成されていることを特徴とする請求項１乃至３のいずれか１項に記載の画像形成装置。 In the butting portion,
The flat part which is connected to the slope formed at the tip of the abutting part and is substantially orthogonal to the moving direction of the abutted member is formed. The image forming apparatus described in the item. 前記突き当て部には、
前記突き当て部の先端側に対して反対側に設けられ、
前記平坦部に接続し、
前記突き当て部の先端に形成された前記斜面よりも傾斜角が小さく、
かつ、前記斜面が傾斜する方向とは反対方向に傾斜する斜面が設けられていることを特徴とする請求項４に記載の画像形成装置。 In the butting portion,
Provided on the opposite side to the tip side of the abutting part,
Connected to the flat part,
The inclination angle is smaller than the slope formed at the tip of the abutting part,
The image forming apparatus according to claim 4, further comprising a slope inclined in a direction opposite to a direction in which the slope is inclined. 装置本体の外側面には、
前記開閉ドアの開閉動作を行う把持部が設けられており、
前記突き当て部は、
前記把持部の近傍に配置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項に記載の画像形成装置。 On the outer surface of the device body,
A gripping part for performing opening and closing operation of the opening and closing door is provided,
The butting portion is
The image forming apparatus according to claim 1, wherein the image forming apparatus is disposed in the vicinity of the grip portion.
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