JP2008195469A - Image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device capable of preventing an end in a conveying direction of a medium to be recorded from being abutted on a side fence and being buckled using a weight and a medium to be recorded pressing member provided on the side fence, and reducing skew. <P>SOLUTION: The paper feeding cassette 10 is provided with a storage part 1a for the medium to be recorded pressing member 2 at a position corresponding to a rail for varying a position of the side fence 1 when the medium to be recorded such as paper is set. In order to ensure the weight that the medium to be recorded pressing member 2 presses the paper or the like, the weight 4 is provided at a lower side of a bottom plate 3 using the same support shaft 5. When the bottom plate 3 loaded with the paper is raised, an upper end portion 2b of the medium to be recorded pressing member 2 presses the bundle of papers P from above with the side fence 1 by weight of the weight 4. The medium to be recorded is an article like an envelope, and even if it is expanded, the medium to be recorded is not buckled at right and left end edges in a conveying direction, and paper feeding that skew can be eliminated or reduced can be attained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電子写真方式の、複写機、ファクシミリ、プリンタ、あるいはそれらの機能を二以上有する複合機等の複数種類の被記録媒体をセットできる給紙カセットを有する画像形成装置に関する。   The present invention relates to an image forming apparatus having a paper feed cassette capable of setting a plurality of types of recording media such as an electrophotographic copying machine, a facsimile machine, a printer, or a multifunction machine having two or more functions thereof.

この種の給紙カセットを備える画像形成装置としては、例えば特許文献１に記載の装置のように、給紙用押さえ部材を給紙トレイの圧板上に積載された被記録媒体上に載置して、給紙用押さえ部材によって被記録媒体を上側から抑えることによってたわみや膨らみを抑制し、そうすることで安定した確実な給紙を行えるようにするとともに、単に載置する構成として被記録媒体のセットを容易にしたものがある。   As an image forming apparatus provided with this type of paper feed cassette, a paper feed pressing member is placed on a recording medium stacked on a pressure plate of a paper feed tray, for example, as in the apparatus described in Patent Document 1. In addition, by suppressing the recording medium from the upper side by the sheet feeding pressing member, it is possible to suppress deflection and bulge, thereby enabling stable and reliable sheet feeding and simply placing the recording medium. There are things that make the set easier.

また特許文献２に記載の装置のように、第１と第２のシート搬送手段の間にシートのたわみ部分を形成させることなくシートのスキュー防止ができ、従って第１と第２のシート搬送手段との間にシートたわみ部形成のための大きなスペースが必要なくなり、装置の小型化を図ることを可能としたものがある。   Further, as in the apparatus described in Patent Document 2, sheet skew can be prevented without forming a bent portion of the sheet between the first and second sheet conveying means, and therefore the first and second sheet conveying means. There is no need for a large space for forming a sheet bending portion between the two, and the apparatus can be downsized.

特開２００５−２３１８２１号公報JP-A-2005-231821 特許第２７３８１８１号公報Japanese Patent No. 2738181

ところで、上述のような特許文献に記載のものだけでなく、一般的には、給紙カセット内にある用紙などの被記録媒体が供給される際のスキューを防止するために、サイドフェンスで被記録媒体の端面を押えている。   By the way, not only those described in the patent documents as described above, but generally, in order to prevent skew when a recording medium such as paper in a paper feed cassette is supplied, it is covered by a side fence. The end face of the recording medium is pressed.

しかしながら、封筒のような被記録媒体では、封筒が膨らんだり変形することで搬送方向の左右の端部で被記録媒体が座屈し、サイドフェンスの押さえの効果を発揮できないという問題がある。   However, a recording medium such as an envelope has a problem in that the recording medium is buckled at the left and right ends in the transport direction due to the expansion and deformation of the envelope, and the effect of pressing the side fence cannot be exhibited.

またこの種の給紙カセットでは、被記録媒体をセットする時に、サイドフェンスやエンドフェンスを操作する以外の動作が無いことが望ましいが、例えば上述の特許文献１に開示されている装置では、給紙カセット内に封筒（封筒は、国内、海外あわせるとさまざまなサイズが存在し、そのためにセットが面倒である。））をセットした時に、封筒を上側から押えるプレートを上から載せなければならないため、ユーザーのセット時の操作が多くなってしまう等のように、従来公知の給紙カセットでは何らかの余分な操作を必要とすると言う問題があった。   In this type of paper feed cassette, it is desirable that there is no action other than operating the side fence and end fence when setting the recording medium. For example, in the apparatus disclosed in Patent Document 1 described above, When you set envelopes in paper cassettes (envelopes come in various sizes in Japan and overseas, so setting is cumbersome)), you need to place a plate to hold the envelopes from the top. In the conventional paper feed cassette, there is a problem that some extra operation is required, such as a large number of operations when the user sets.

そこで本発明は、錘とサイドフェンスに設ける被記録媒体押さえ部材を用いて、被記録媒体の搬送方向の端部がサイドフェンスに当って座屈するのを防止することを防止し、それによってスキューを低減できる画像形成装置を提供することを目的とする。   Therefore, the present invention uses a recording medium pressing member provided on the weight and the side fence to prevent the end in the conveyance direction of the recording medium from being buckled against the side fence, thereby causing a skew. An object of the present invention is to provide an image forming apparatus that can be reduced.

また本発明は、被記録媒体をそのまま上側から給紙カセット内に挿入でき、余分な操作が不要で、操作性に優れた給紙カセットを備える画像形成装置を提供することを目的とする。   Another object of the present invention is to provide an image forming apparatus including a paper feed cassette that can insert a recording medium as it is into the paper feed cassette from the upper side, does not require an extra operation, and has excellent operability.

本発明の画像形成装置のうち請求項１に係るものは、被記録媒体に画像を記録する画像形成部と、前記被記録媒体を前記画像形成部に搬送する搬送手段と、前記搬送手段に前記被記録媒体を供給する給紙手段と、前記被記録媒体をセットする給紙カセットとを有する画像形成装置において、前記給紙カセット内に、被記録媒体を積載する底板と、被記録媒体の側端部を押さえるサイドフェンスと、前記底板と同じ支持軸により支持され、前記底板の下方に設けられた錘と、前記サイドフェンスに設けられ、前記錘の動きと連動して前記被記録媒体を上方より押さえる被記録媒体押さえ部材と、を有することを特徴とする。   An image forming apparatus according to a first aspect of the present invention includes an image forming unit that records an image on a recording medium, a conveying unit that conveys the recording medium to the image forming unit, and the conveying unit that includes the image forming unit. In an image forming apparatus having a paper supply means for supplying a recording medium and a paper supply cassette for setting the recording medium, a bottom plate for loading the recording medium in the paper supply cassette, and a side of the recording medium A side fence that holds the end portion, a weight supported by the same support shaft as the bottom plate, and a weight provided below the bottom plate, and provided on the side fence, the recording medium is moved upward in conjunction with the movement of the weight. And a recording medium pressing member for further pressing.

同請求項２に係るものは、請求項１に記載の画像形成装置において、少なくとも前記給紙カセットへの被記録媒体をセットする時に前記被記録媒体押さえ部材が前記サイドフェンス内に収納可能であることを特徴とする。   According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the recording medium pressing member can be stored in the side fence at least when the recording medium is set in the paper feed cassette. It is characterized by that.

同請求項３に係るものは、請求項１または２に記載の画像形成装置において、前記被記録媒体押さえ部材が前記サイドフェンスとともに移動可能であることを特徴とする。   According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect, the recording medium pressing member is movable together with the side fence.

同請求項４に係るものは、請求項１から３のいずれかに記載の画像形成装置において、前記錘を前記底板の下に収納可能としてなることを特徴とする。   According to a fourth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects, the weight can be stored under the bottom plate.

同請求項５に係るものは、請求項４に記載の画像形成装置において、前記錘が板状であることを特徴とする。   According to a fifth aspect of the present invention, in the image forming apparatus according to the fourth aspect, the weight is plate-shaped.

同請求項６に係るものは、請求項３から５のいずれかに記載の画像形成装置において、前記錘が、前記被記録媒体押さえ部材を上下方向に通し、かつ前記サイドフェンスの移動方向に延びる開口を有することを特徴とする。   According to a sixth aspect of the present invention, in the image forming apparatus according to any one of the third to fifth aspects, the weight passes through the recording medium pressing member in the vertical direction and extends in the moving direction of the side fence. It has an opening.

本発明は、錘の負荷を使用して被記録媒体押さえ部材で上方から押えることで、被記録媒体の搬送方向の端部がサイドフェンスに当り座屈するのを防止し、被記録媒体のスキューの低減が期待できるという効果がある。   The present invention prevents the end of the recording medium in the conveying direction from buckling against the side fence by pressing the recording medium pressing member from above using a weight load, and prevents the recording medium from being skewed. There is an effect that reduction can be expected.

また本発明は、用紙セット時に押え部材がサイドフェンス内に収まるようにして操作性に優れたものとなるという効果がある。   In addition, the present invention has an effect that the presser member is accommodated in the side fence when the paper is set, and the operability is excellent.

以下、本発明の実施形態に関して、添付図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は本発明に係る画像形成装置の要部を示す断面図、図２は図１の画像形成装置が備える給紙カセットにおいて、被記録媒体の積載枚数が少ない時、図３は被記録媒体の積載枚数が多い時の状態を示す断面図である。図示のように、給紙カセット１０には、被記録媒体のスキューを防止するために、被記録媒体の搬送方向に沿う縁の端面を押さえるサイドフェンス１が設置されている。   FIG. 1 is a cross-sectional view showing the main part of the image forming apparatus according to the present invention. FIG. 2 is a diagram showing a recording medium when the number of stacked recording media is small in the paper feed cassette provided in the image forming apparatus of FIG. It is sectional drawing which shows a state when there are many load sheets. As shown in the drawing, a side fence 1 that presses the end face of the edge along the conveyance direction of the recording medium is installed in the paper feed cassette 10 in order to prevent skew of the recording medium.

このサイドフェンス１には、被記録媒体の搬送方向（図中矢印と給紙方向との文字で示す。）の縁部が当り、給紙する際のスキューを防止しようとするものであるが、上述のように、封筒のように膨らんだり変形することで搬送方向の左右の縁で被記録媒体が座屈し、サイドフェンス１が被記録媒体を押さえるという機能を発揮できない場合がある。そこで、被記録媒体の種類は積載量にかかわらず被記録媒体を押さえるという機能を発揮できるようにするために、サイドフェンス１に設けた収納部１ａに収納可能に被記録媒体押え部材２を設けるとともに、底板３と同じ支持軸５を使用して底板３の下側に板状の錘４を設け、被記録媒体押え部材２の下端を錘４に取り付け、錘４の重さによって被記録媒体押え部材２が被記録媒体を上方から十分に押え得るようにしている。   The side fence 1 hits the edge of the recording medium in the conveyance direction (indicated by the characters of the arrow and the feeding direction in the figure), and is intended to prevent skew during feeding. As described above, there is a case where the recording medium is buckled at the left and right edges in the transport direction by expanding and deforming like an envelope, and the side fence 1 cannot exert the function of pressing the recording medium. Therefore, the recording medium pressing member 2 is provided so that the recording medium can be stored in the storage portion 1a provided in the side fence 1 so that the function of pressing the recording medium can be exhibited regardless of the type of the recording medium. In addition, a plate-like weight 4 is provided on the lower side of the bottom plate 3 using the same support shaft 5 as the bottom plate 3, and the lower end of the recording medium pressing member 2 is attached to the weight 4. The pressing member 2 can sufficiently hold the recording medium from above.

図４は、図１に示した給紙カセット１０を上方から見た平面図、図５は底板３の平面図、図６は錘４の平面図である。給紙カセット１０は、用紙等の被記録媒体をセットする時にサイドフェンス１の位置を可変させるためのレール部分と対応する位置に被記録媒体押え部材２を設けてある。なお被記録媒体押え部材２は、収納部１ａを利用した上下動以外は拘束してあるので、サイドフェンス１の動きに追従して動き、簡単な操作でさまざまなサイズの被記録媒体に対応できるようにしてある。サイドフェンス１の位置を可変させる構造については公知であるので図示及び説明を省略する。   4 is a plan view of the paper feed cassette 10 shown in FIG. 1 as viewed from above, FIG. 5 is a plan view of the bottom plate 3, and FIG. 6 is a plan view of the weight 4. The paper feed cassette 10 is provided with a recording medium pressing member 2 at a position corresponding to a rail portion for changing the position of the side fence 1 when setting a recording medium such as paper. Since the recording medium pressing member 2 is restrained except for the vertical movement using the storage portion 1a, the recording medium pressing member 2 moves following the movement of the side fence 1 and can handle recording media of various sizes with a simple operation. It is like that. Since the structure for changing the position of the side fence 1 is known, illustration and description thereof are omitted.

錘４は、被記録媒体押え部材２が被記録媒体を押さえるための重さを確保するために、底板３並みの大きさ程度があることが好ましく、本実施例ではほぼ同じ平面形状としてある（凹凸の有無等の違いはある。）。また既述のように底板３と同じ支持軸５を使用している。図５、６中の符号５ａ、５ｂは、それぞれ底板３、錘４の支持軸５の軸受部である。そのため、錘４は底板３の下側に収納される形態とすることが可能となっており、給紙カセットとしての省スペース化も図られている。   The weight 4 preferably has the same size as the bottom plate 3 in order to secure the weight for the recording medium pressing member 2 to press the recording medium. In this embodiment, the weight 4 has substantially the same planar shape ( There are differences in the presence or absence of irregularities.) Further, as described above, the same support shaft 5 as the bottom plate 3 is used. Reference numerals 5 a and 5 b in FIGS. 5 and 6 denote bearing portions of the support shaft 5 of the bottom plate 3 and the weight 4, respectively. Therefore, the weight 4 can be stored in the lower side of the bottom plate 3, and space saving as a paper feeding cassette is also achieved.

また底板３と錘４には、被記録媒体押え部材２を通すための開口３ａと開口状のスリット４ａが設けてあり、被記録媒体押え部材２は下端の抜け止め部材２ａを錘４のスリット４ａの下側に位置させて抜け止めしてあり、底板３の開口３ａを通り抜け、上端部分２ｂはサイドフェンス１の収納部１ａ内に位置している。   Further, the bottom plate 3 and the weight 4 are provided with an opening 3a for passing the recording medium pressing member 2 and an opening-shaped slit 4a. The recording medium pressing member 2 has a retaining member 2a at the lower end as a slit of the weight 4. It is positioned below 4 a and is prevented from coming off, passes through the opening 3 a of the bottom plate 3, and the upper end portion 2 b is located in the storage portion 1 a of the side fence 1.

図７は、上述のような画像形成装置において、給紙カセット１０を取り出し、底板３を解除した時の状態を示す。画像形成装置から、給紙カセット１０を取り外した時、底板３が解除される機構は周知であるので説明は省略する。   FIG. 7 shows a state where the sheet cassette 10 is taken out and the bottom plate 3 is released in the image forming apparatus as described above. Since the mechanism for releasing the bottom plate 3 when the paper feed cassette 10 is removed from the image forming apparatus is well known, description thereof is omitted.

本実施例では、被記録媒体押え部材２と、底板３とが同じ支持軸５を使用しており、底板３の下方に設けた錘４との関係は、錘４に形成されたスリット４ａの下側に、被記録媒体押え部材２の抜け留め部分２ａを形成して取り付けているため、被記録媒体押え部材２は、搬送方向に対して直角方向（図７の紙面垂直方向）へは自由にスライドし、移動が可能となっている。また搬送方向から見て被記録媒体押え部材２の回転も拘束は無いため、自由である。   In this embodiment, the recording medium pressing member 2 and the bottom plate 3 use the same support shaft 5, and the relationship with the weight 4 provided below the bottom plate 3 is that of the slit 4 a formed in the weight 4. Since the retaining portion 2a of the recording medium pressing member 2 is formed and attached to the lower side, the recording medium pressing member 2 can freely move in a direction perpendicular to the transport direction (perpendicular to the paper surface in FIG. 7). It can slide and move. Further, since the rotation of the recording medium pressing member 2 is not restricted when viewed from the transport direction, it is free.

このような被記録媒体押え部材２とサイドフェンス１の関係は、サイドフェンス１内に被記録媒体押え部材２が上下動できるレール、具体的には凹状の収納部１ａが設けられており、搬送方向から見て被記録媒体押え部材２の回転を拘束している。ただし、用紙Ｐが底板３上から無くなり、ユーザーが用紙補給を行う時の底板３、錘４が共に下がりきったところでは、図８に示すように、被記録媒体押え部材２が上下動できる収納部１ａの断面形状被記録部材押え部材の幅よりも給紙カセット１０の外方向に広くなっている。   Such a relationship between the recording medium pressing member 2 and the side fence 1 is such that a rail on which the recording medium pressing member 2 can move up and down, specifically a concave storage portion 1a, is provided in the side fence 1 and is conveyed. The rotation of the recording medium pressing member 2 is restricted as viewed from the direction. However, when the sheet P disappears from the bottom plate 3 and the bottom plate 3 and the weight 4 are both lowered when the user replenishes the sheet, the recording medium pressing member 2 can be moved up and down as shown in FIG. The cross-sectional shape of the portion 1a is wider toward the outside of the paper feed cassette 10 than the width of the recording member pressing member.

被記録部材押え部材２は、重心が給紙カセット１０の外方向にあるので、この収納部１ａが広くなっている個所で、被記録部材押え部材２が収納部１ａ内で外側に倒れる。すると、用紙Ｐのセット時には被記録部材押え部材２がサイドフェンス１収納部１ａ内にすっかり収まり、被記録媒体である用紙Ｐとは接触することが無くなるので、そのまま上側から被記録媒体である用紙Ｐ等を挿入できる。   Since the center of gravity of the recording member pressing member 2 is in the outward direction of the paper feed cassette 10, the recording member pressing member 2 falls outside in the storage portion 1a where the storage portion 1a is widened. Then, when the paper P is set, the recording member pressing member 2 is completely accommodated in the side fence 1 accommodating portion 1a and does not come into contact with the paper P that is a recording medium. P or the like can be inserted.

そして図９、図１０のように底板３が上昇すると（底板を上昇させる機構はこれも周知であるので図示及び説明を省略する。）、被記録媒体押え部材２の上端部分２ｂが用紙Ｐの束を上方からサイドフェンス１とともにしっかりと押さえる。このため、給紙カセット内にセットされている被記録媒体が封筒のような被記録媒体で、膨らんだり、変形したりしても、搬送方向の左右の端縁部で被記録媒体が座屈したりすることがなく、スキューをなくし、あるいは低減させることができる給紙を実現できる。なお、既に述べたように、上述した特許文献１に開示されている技術では、給紙カセット内に封筒等をセットした時には、封筒等を上側から押えるプレートを上から載せなければならないため、ユーザーから見ればセット時の操作が多くなってしまうが、本発明ならびにその実施例ではそのようなことがなく、通常の給紙カセットへの用紙等のセットと同じ作業で済む。また錘は、重さを確保するために、底板並の大きさが必要になるので、本発明とその実施例のように、そのような錘を底板の下に収納すれば省スペース化に資することができる。   9 and 10, when the bottom plate 3 is raised (the mechanism for raising the bottom plate is also well known, illustration and description thereof is omitted), the upper end portion 2 b of the recording medium pressing member 2 is formed on the sheet P. Hold the bundle together with the side fence 1 from above. For this reason, even if the recording medium set in the paper feed cassette is a recording medium such as an envelope, and the recording medium swells or deforms, the recording medium buckles at the left and right edges in the transport direction. Therefore, it is possible to realize paper feeding that can eliminate or reduce skew. As already described, in the technique disclosed in Patent Document 1 described above, when an envelope or the like is set in the paper feed cassette, a plate for pressing the envelope or the like from the upper side must be placed from above. However, in the present invention and the embodiment, this is not the case, and the same operation as that for setting sheets or the like in a normal sheet feeding cassette is sufficient. Further, since the weight needs to be as large as the bottom plate in order to secure the weight, if such a weight is stored under the bottom plate as in the present invention and its embodiments, it contributes to space saving. be able to.

本発明に係る画像形成装置の要部を示す断面図Sectional drawing which shows the principal part of the image forming apparatus which concerns on this invention 図１の画像形成装置が備える給紙カセットにおいて、被記録媒体の積載枚数が少ない時の状態を示す断面図1 is a cross-sectional view showing a state when the number of recording media is small in the paper feed cassette provided in the image forming apparatus of FIG. 図１の画像形成装置が備える給紙カセットにおいて、被記録媒体の積載枚数が多い時の状態を示す断面図FIG. 1 is a cross-sectional view illustrating a state where the number of stacked recording media is large in the paper feed cassette provided in the image forming apparatus of FIG. 図１に示した給紙カセットを上方から見た平面図A plan view of the paper feed cassette shown in FIG. 同底板の平面図Top view of the bottom plate 同錘の平面図Top view of the same weight 図１に示した給紙カセットを取り出し、底板を解除した時の状態を示す断面図Sectional drawing which shows the state when taking out the paper feed cassette shown in FIG. 1 and releasing the bottom plate 図７の状態の給紙カセットの側縁部分の断面図Sectional drawing of the side edge part of the paper feed cassette of the state of FIG. 図１に示した給紙カセットに用紙をセットして取り付け、錘とともに被記録部材押え部材で用紙の束を上から押さえている上体の断面図1 is a cross-sectional view of an upper body in which paper is set and attached to the paper feed cassette shown in FIG. 1 and a bundle of paper is pressed from above with a recording member pressing member together with a weight. 図９の状態の給紙カセットの側縁部分の断面図Sectional drawing of the side edge part of the paper feed cassette of the state of FIG.

符号の説明Explanation of symbols

１：サイドフェンス
１ａ：収納部
２：被記録媒体押え部材
２ａ：抜け留め部分
２ｂ：上端部分
３：底板
３ａ：開口
５：支持軸
４：錘
４ａ：開口状のスリット
５ａ、５ｂ：軸受部
１０：給紙カセット
Ｐ：用紙
DESCRIPTION OF SYMBOLS 1: Side fence 1a: Storage part 2: Recording medium pressing member 2a: Retaining part 2b: Upper end part 3: Bottom plate 3a: Opening 5: Support shaft 4: Weight 4a: Open slit 5a, 5b: Bearing part 10 : Paper cassette P: Paper

Claims (6)

被記録媒体に画像を記録する画像形成部と、
前記被記録媒体を前記画像形成部に搬送する搬送手段と、
前記搬送手段に前記被記録媒体を供給する給紙手段と、
前記被記録媒体をセットする給紙カセットと、を有する画像形成装置において、
前記給紙カセット内に、
被記録媒体を積載する底板と、
被記録媒体の側端部を押さえるサイドフェンスと、
前記底板と同じ支持軸により支持され、前記底板の下方に設けられた錘と、
前記サイドフェンスに設けられ、前記錘の動きと連動して前記被記録媒体を上方より押さえる被記録媒体押さえ部材と、
を有することを特徴とする画像形成装置。 An image forming unit for recording an image on a recording medium;
Conveying means for conveying the recording medium to the image forming unit;
Paper feeding means for supplying the recording medium to the conveying means;
In an image forming apparatus having a paper feed cassette for setting the recording medium,
In the paper cassette,
A bottom plate for loading the recording medium;
A side fence that holds the side edge of the recording medium;
A weight supported by the same support shaft as the bottom plate and provided below the bottom plate;
A recording medium pressing member that is provided on the side fence and presses the recording medium from above in conjunction with the movement of the weight;
An image forming apparatus comprising: 少なくとも前記給紙カセットへの被記録媒体をセットする時に前記被記録媒体押さえ部材が前記サイドフェンス内に収納可能であることを特徴とする請求項１に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the recording medium pressing member can be stored in the side fence at least when the recording medium is set in the paper feeding cassette. 前記被記録媒体押さえ部材が前記サイドフェンスとともに移動可能であることを特徴とする請求項１または２に記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the recording medium pressing member is movable together with the side fence. 前記錘を前記底板の下に収納可能としてなることを特徴とする請求項１から３のいずれかに記載の画像形成装置。 The image forming apparatus according to claim 1, wherein the weight can be stored under the bottom plate. 前記錘が板状であることを特徴とする請求項４に記載の画像形成装置。 The image forming apparatus according to claim 4, wherein the weight has a plate shape. 前記錘が、前記被記録媒体押さえ部材を上下方向に通し、かつ前記サイドフェンスの移動方向に延びる開口を有することを特徴とする請求項３から５のいずれかに記載の画像形成装置。
6. The image forming apparatus according to claim 3, wherein the weight has an opening that passes through the recording medium pressing member in a vertical direction and extends in a moving direction of the side fence.