JP4701091B2 - Paper feeding device and image forming apparatus - Google Patents

Paper feeding device and image forming apparatus Download PDF

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JP4701091B2
JP4701091B2 JP2006011686A JP2006011686A JP4701091B2 JP 4701091 B2 JP4701091 B2 JP 4701091B2 JP 2006011686 A JP2006011686 A JP 2006011686A JP 2006011686 A JP2006011686 A JP 2006011686A JP 4701091 B2 JP4701091 B2 JP 4701091B2
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paper
locking member
locking
side fence
locking claw
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JP2007191277A (en
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英臣 佐久間
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Ricoh Co Ltd
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Description

本発明は、サイドフェンスを有する給紙装置及びその給紙装置を搭載した画像形成装置に関する。   The present invention relates to a sheet feeding device having a side fence and an image forming apparatus equipped with the sheet feeding device.

給紙装置において、用紙搬送方向から見て両サイドの用紙端面を規制するサイドフェンスは、不定形サイズの用紙を給紙カセット内にセットするために、用紙搬送方向に対して直交(直角)方向に往復移動し、どの位置でも止まるようになっている。
不定形サイズ紙を使用する場合、セットする用紙幅より広い位置にサイドフェンスを予め固定しておき、給紙カセット内に用紙を載置した後で、サイドフェンスを移動させ、用紙端面にサイドフェンスを接触させその位置で固定する。
また、定形サイズの用紙を使用した場合でも、定形サイズ固定位置が分かるように設けられた指標位置付近の若干広めな位置にサイドフェンスを予め固定し、給紙カセットに用紙を載置してから、用紙端面にサイドフェンスを接触させその位置で固定する。あるいは、用紙載置前にサイドフェンスを定形サイズ紙の正確な幅に移動させる。
特許文献1記載の技術においては、定形サイズ紙と不定形サイズ紙の両方を給紙カセットにセット可能にするために、2系列のサイドフェンスロック機構を設けている。
特開2005−35715公報
In the paper feeding device, the side fence that regulates the paper end faces on both sides when viewed from the paper transport direction is perpendicular (perpendicular) to the paper transport direction in order to set irregular-size paper in the paper feed cassette. Reciprocates to stop at any position.
When using non-standard size paper, fix the side fence in a position wider than the paper width to be set, place the paper in the paper cassette, move the side fence, and place the side fence on the paper edge. Touch and fix in place.
Also, even when using standard size paper, after fixing the side fence in a slightly wider position near the index position provided so that the fixed size fixed position can be seen, and placing the paper in the paper cassette Then, the side fence is brought into contact with the end surface of the paper and fixed at that position. Alternatively, the side fence is moved to the correct width of the standard size paper before placing the paper.
In the technique described in Patent Document 1, two series of side fence lock mechanisms are provided in order to set both regular size paper and irregular size paper in a paper feed cassette.
JP 2005-35715 A

上記従来技術は、構造が複雑で部品点数が多く、コストアップにつながるという欠点がある。コストダウンのため、2系列のロック機構を給紙カセット底面に並べることも考えられるが、その場合、第一係止爪と第二係止爪はそれぞれの機能が異なることから形状が異なるので、第一係止爪で第一のロックをしたときに、その前後の位置で第二のロックができなくなるという問題がある。
本発明はこのような背景に鑑みてなされたものであり、2系列のロック機構が互いに干渉することなくサイドフェンスを移動させることができ、定形サイズ紙も不定形サイズ紙も所定の位置でセットすることができる給紙装置及び画像形成装置を提供することを目的とする。
The above prior art has a drawback that the structure is complicated and the number of parts is large, leading to an increase in cost. For cost reduction, it is conceivable to arrange two series of lock mechanisms on the bottom surface of the paper feed cassette, but in that case, since the first locking claw and the second locking claw have different functions, the shape is different. When the first locking claw is used for the first locking, there is a problem that the second locking cannot be performed at the front and back positions.
The present invention has been made in view of such a background, and the two series of locking mechanisms can move the side fence without interfering with each other. Both the regular size paper and the irregular size paper are set at predetermined positions. It is an object of the present invention to provide a sheet feeding device and an image forming apparatus that can perform the above-described operation.

上記目的を達成するために、請求項1記載の発明は、給紙カセット内で底板に載置された不定形サイズ紙または定形サイズ紙の幅方向端面に対して進退自在に支持されたサイドフェンスを有する給紙装置において、不定形サイズ紙を所定の位置にセットする際のサイドフェンス位置決め用の第一係止爪を有する第一係止部材と、定形サイズ紙を所定の位置にセットする際のサイドフェンス位置決め用の第二係止爪を有する第二係止部材と、一係止爪が係脱可能な、前記給紙カセットの底板に用紙幅方向に形成された第一の凹部と、二係止爪が係脱可能な、前記給紙カセットの底板に第一の凹部列と平行に形成された第二2の凹部列と、を有し、第一係止部材は、前記サイドフェンスの外側に軸を中心に揺動可能に設けられ、第二係止部材は、前記サイドフェンスと第一係止部材との間に上下動可能に設けられ、第一及び第二係止部材は、第一係止爪が第一の凹部列に、第二係止爪が第2の凹部列に、それぞれ係合する向きにばねにより付勢され、第一係止部材は、前記軸よりも上部に第二係止部材との係合部を有し、前記係合部は、第一係止爪を第一の凹部列から離脱させる向きに、第一係止部材の上部を用紙幅方向内側に揺動させたとき、第二係止部材をその付勢力に抗して上方に移動させるためのテーパ部を有することを特徴とする。
請求項2記載の発明は、請求項1記載の給紙装置において、、第二係止部材は前記サイドフェンスに形成された嵌合孔に上下動可能に嵌合し、その上方からコイルバネで下方に付勢されていることを特徴とする。
請求項3記載の発明は、請求項1または2記載の給紙装置を備えた画像形成装置にある
In order to achieve the above object, the invention according to claim 1 is a side fence that is supported so as to be movable forward and backward with respect to the end surface in the width direction of the irregular size paper or the regular size paper placed on the bottom plate in the paper feed cassette A first locking member having a first locking claw for positioning a side fence when an irregular size paper is set at a predetermined position and a fixed size paper at a predetermined position A second locking member having a second locking claw for positioning the side fence, and a first recess row formed in the sheet width direction on the bottom plate of the paper feed cassette, wherein the first locking claw is detachable. When the second locking pawl is disengageably, anda recess row of the second 2 formed in parallel with the first concave portion rows on the bottom plate of the paper feed cassette, the first locking member, The second locking portion is provided on the outside of the side fence so as to be swingable around an axis. Is provided between the side fence and the first locking member so as to be movable up and down. The first and second locking members have a first locking claw in the first recess row and a second locking claw. Are urged by springs in the respective engaging directions of the second recess rows, and the first locking member has an engagement portion with the second locking member above the shaft, and the engagement When the upper portion of the first locking member is swung inward in the paper width direction so that the first locking claw is detached from the first recess row, the second locking member resists the biasing force. And a tapered portion for moving upward .
According to a second aspect of the present invention, in the paper feeding device according to the first aspect, the second locking member is fitted in a fitting hole formed in the side fence so as to be movable up and down, and downward from above by a coil spring. It is characterized by being energized .
According to a third aspect of the present invention , there is provided an image forming apparatus comprising the paper feeding device according to the first or second aspect .

本発明は、給紙カセット内にある用紙を所定の位置にセットするための、通紙方向に対し直角方向に往復移動可能なサイドフェンスを有する給紙装置において、不定形サイズ紙を所定の位置にセットする第一係止爪を有する第一係止爪部材と、定形サイズ紙を所定の位置にセットする第二係止爪を有する第二係止爪部材とを有し、第一係止爪と第二係止爪は第一係止爪部材の1つの操作で同時にロック解除するよう構成されているので、2系列のロック機構が互いに干渉することなくサイドフェンスを移動させることができ、定形サイズ紙も不定形サイズ紙も所定の位置でセットすることができる。 The present invention relates to a paper feeding device having a side fence that can reciprocate in a direction perpendicular to the paper passing direction for setting paper in a paper feeding cassette to a predetermined position. A first locking claw member having a first locking claw to be set on the first locking claw member and a second locking claw member having a second locking claw to set the standard size paper at a predetermined position. Since the claw and the second locking claw are configured to unlock simultaneously by one operation of the first locking claw member , the two fences can move the side fence without interfering with each other, Both regular size paper and irregular size paper can be set at predetermined positions.

以下、本発明の実施形態を図面に従って説明する。
図1はインクジェット式画像形成装置における給紙装置の構成図である。給紙装置1は、給紙カセット2と、先端部が揺動(上下動)自在の底板3と、給紙ローラ4を備え、給紙カセット2内で底板3上に載置、セットされた用紙を給紙ローラ4により1枚ずつ下流側に送り出すようになっている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram of a sheet feeding device in an ink jet image forming apparatus. The paper feeding device 1 includes a paper feeding cassette 2, a bottom plate 3 whose tip is freely swingable (up and down), and a paper feeding roller 4. The paper feeding device 1 is placed and set on the bottom plate 3 in the paper feeding cassette 2. The paper is fed to the downstream side by the paper feed roller 4 one by one.

図2は給紙カセットにおいて用紙をサイドフェンスで規制する様子を示す上面図である。用紙Pの幅方向(給紙方向と直角な方向)両側には用紙端面を規制するサイドフェンス5(5−1、5−2)が設けてある。サイドフェンス5は、用紙幅方向に往復移動しどの位置でも止まるようになっている。
具体的には一方のサイドフェンス5−2を用紙Pの幅方向に移動することで、もう一方のサイドフェンス5−1も周知のラックとピニオンの機構(2つの平行配置されたラックギヤを単一のピニオンギヤで挟んだ機構)により内外方向へ等距離ずつ移動し、両方のサイドフェンス5−1、5−2の中心は一定に保たれる。
FIG. 2 is a top view showing a state where the paper is regulated by the side fence in the paper feed cassette. Side fences 5 (5-1, 5-2) are provided on both sides of the sheet P in the width direction (direction perpendicular to the sheet feeding direction) to restrict the sheet end surface. The side fence 5 moves back and forth in the sheet width direction and stops at any position.
Specifically, by moving one side fence 5-2 in the width direction of the sheet P, the other side fence 5-1 also has a well-known rack and pinion mechanism (two rack gears arranged in parallel are arranged in a single unit). And the center of both side fences 5-1 and 5-2 is kept constant.

図3は本発明の実施形態に係る給紙装置の給紙カセットの上面図、図4は図3に示す給紙カセットのサイドフェンスロック機構を示す構成図である。サイドフェンス5−2に設けられた第一係止部材6の下端に形成された第一係止爪6−1は、給紙カセット2の底面に1ミリメートル以下のピッチで形成されたラッチ列7と係止するために小さな寸法となっており、第一係止爪6−1と第1のラッチ列の何れかの凹部(第1の凹部)7とが係止することで、サイドフェンス5−1、5−2を自由な幅方向位置で固定できる。第一係止爪6−1は、回動軸6aを中心として幅方向内外方向へ回動可能であり、第一係止部材6をつまむことで、角度変化がおきて凹部7とのロックが解除される。   FIG. 3 is a top view of a sheet feeding cassette of the sheet feeding device according to the embodiment of the present invention, and FIG. 4 is a configuration diagram showing a side fence lock mechanism of the sheet feeding cassette shown in FIG. The first locking claws 6-1 formed at the lower end of the first locking member 6 provided on the side fence 5-2 are latch rows 7 formed on the bottom surface of the sheet feeding cassette 2 at a pitch of 1 millimeter or less. The first fence nail 6-1 and any one of the concave portions (first concave portions) 7 of the first latch row are locked, so that the side fence 5 -1, 5-2 can be fixed at any position in the width direction. The first locking claw 6-1 can be rotated in the width direction inward and outward with the rotation shaft 6a as the center, and by pinching the first locking member 6, the angle changes and the locking with the recess 7 occurs. Canceled.

サイドフェンス5−2に設けられた第二係止部材8の下端に形成された第二係止爪8−1は第2のラッチ列を構成する定形サイズ幅のピッチの凹部(第2の凹部)9と係止する。後述するように、第二係止爪8−1は上方から付勢されているので、凹部9に入り込むときユーザーにクリック感を与えることができる。第二係止爪8−1は、後述するように第一係止部材6の上部をつまむことで上昇して凹部9から離脱する。
要するに本発明では、凹部のピッチが異なる2つのラッチ列を幅方向に沿って平行に配置し、各凹部7、9に対して異なった係止爪6−1、8−1が形成するように構成している。
The second latching claw 8-1 formed at the lower end of the second latching member 8 provided on the side fence 5-2 is a concave portion (second concave portion) having a fixed size width and constituting the second latch row. ) 9 and lock. As will be described later, since the second locking claw 8-1 is biased from above, a click feeling can be given to the user when entering the recess 9. As will be described later, the second latching claw 8-1 is lifted by pinching the upper portion of the first latching member 6 and detached from the recess 9.
In short, in the present invention, two latch rows with different recess pitches are arranged in parallel along the width direction so that different locking claws 6-1 and 8-1 are formed for the recesses 7 and 9, respectively. It is composed.

図4に示すように、第一係止部材6は反時計回り方向に揺動(回動)し、ロック解除レバーとして機能する。即ち、第一係止部材6の上端部を図において図示しないバネ力に抗して左側(内側)に倒すと、第一係止爪6−1が外側へ回動して、ラッチ列を構成する凹部7とのロックが解除される。
また第二係止部材8は、サイドフェンス5−2内の嵌合孔5−3内に上下動可能に嵌合されており、上方からコイルバネ10で下方に付勢されている。そして第二係止部材8は高さ方向中央に長穴8−2を備えている。第一係止部材6はこの長穴8―2に嵌合して長穴8−2の上側角部に摺接するテーパー部6−2を有している。テーパー部6−2は、内側下方から外側上方に向けて傾斜した面である。
As shown in FIG. 4, the first locking member 6 swings (turns) in the counterclockwise direction and functions as a lock release lever. That is, when the upper end portion of the first locking member 6 is tilted to the left side (inner side) against a spring force (not shown) in the drawing, the first locking claw 6-1 rotates outward to form a latch row. The lock with the recessed portion 7 is released.
The second locking member 8 is fitted in a fitting hole 5-3 in the side fence 5-2 so as to move up and down, and is biased downward by a coil spring 10 from above. The second locking member 8 has a long hole 8-2 at the center in the height direction. The first locking member 6 has a tapered portion 6-2 that fits into the elongated hole 8-1 and slidably contacts the upper corner of the elongated hole 8-2. The tapered portion 6-2 is a surface inclined from the inner lower side toward the upper outer side.

第一係止部材6の上端部を図において左側(内側)に倒すと、テーパー部6−2が長穴8―2に入り込んで、第二係止部材8を、コイルバネ10の付勢力に抗して上方へ移動させる。これによりに第二係止爪8−1と凹部7のロックが解除される。
上述したように、第一係止部材6の上端部を図において左側に倒した状態でサイドフェンス5を移動させることができる。そして所定の位置で第一係止部材6から手を離せば所定の位置でサイドフェンス5をロックすることができる。
When the upper end portion of the first locking member 6 is tilted to the left (inner side) in the drawing, the tapered portion 6-2 enters the elongated hole 8-2, and the second locking member 8 is resisted against the urging force of the coil spring 10. And move it up. Thereby, the lock | rock of the 2nd latching claw 8-1 and the recessed part 7 is cancelled | released.
As described above, the side fence 5 can be moved in a state where the upper end portion of the first locking member 6 is tilted to the left in the drawing. If the hand is released from the first locking member 6 at a predetermined position, the side fence 5 can be locked at the predetermined position.

つまり、第一係止部材6の上部に対する操作だけで、第一係止爪6−1による第一のロック操作と、第二係止爪8−1による第二のロック操作を同時に行うことができる。また第二係止部材8はコイルバネ(弾性部材)10で下方へ向けて加圧されており、凹部9の前後1ミリメートル以内でも自由に固定できる。具体的には、第一係止部材6の上部(ロックレバー)をつまむと、第一係止爪6と第二係止爪8は、給紙カセット底面の2つのラッチ列を構成する凹部7、9から夫々離間してロックが解除され、第一係止部材6の上部から手を放すとサイドフェンスの幅方向位置がロックされる。このことで、定形サイズや不定形サイズをセットした場合に、面倒な別々の操作を行うことなく、サイドフェンス3bのロックレバーの操作を同一にすることができる。   That is, the first locking operation by the first locking claw 6-1 and the second locking operation by the second locking claw 8-1 can be simultaneously performed only by an operation on the upper portion of the first locking member 6. it can. The second locking member 8 is pressed downward by a coil spring (elastic member) 10 and can be freely fixed within 1 mm before and after the recess 9. Specifically, when the upper part (lock lever) of the first locking member 6 is pinched, the first locking claw 6 and the second locking claw 8 are the recesses 7 constituting the two latch rows on the bottom surface of the sheet feeding cassette. , 9 are separated from each other and the lock is released, and when the hand is released from the upper part of the first locking member 6, the position in the width direction of the side fence is locked. Thus, when a standard size or an irregular size is set, the operation of the lock lever of the side fence 3b can be made the same without performing a troublesome separate operation.

このように本発明では2系列のロック機構が互いに干渉することなく定形サイズも不定形サイズも所定の位置でセットすることができ、給紙カセット底面に2系列のロック爪が係合する2列の形状の異なる凹部群を設けることでコストダウンを図ることができる。
なお、本発明はインクジェット式画像形成装置のみならず、電子写真式画像形成装置、その他の画像形成装置の給紙装置に適用することができる。
As described above, in the present invention, the two series of locking mechanisms can be set at a predetermined position in both the standard size and the irregular size without interfering with each other. Costs can be reduced by providing recess groups having different shapes.
The present invention can be applied not only to an ink jet image forming apparatus but also to an electrophotographic image forming apparatus and a paper feeding device of other image forming apparatuses.

インクジェット式画像形成装置における給紙装置の構成図である。1 is a configuration diagram of a paper feeding device in an ink jet image forming apparatus. 給紙カセットにおいて用紙をサイドフェンスで規制する様子を示す上面図である。FIG. 6 is a top view illustrating a state where a sheet is regulated by a side fence in a sheet feeding cassette. 本発明の実施形態に係る給紙装置の給紙カセットの上面図である。It is a top view of the paper feed cassette of the paper feed device according to the embodiment of the present invention. 図3に示す給紙カセットのサイドフェンスロック機構を示す構成図である。It is a block diagram which shows the side fence lock mechanism of the paper feeding cassette shown in FIG.

符号の説明Explanation of symbols

2 給紙カセット
5 サイドフェンス
6 第一係止部材
6−1 第一係止爪
7 凹部(第一の凹部)
8 第二係止部材
8−1 第二係止爪
9 凹部(第二の凹部)
2 Paper cassette 5 Side fence 6 First locking member 6-1 First locking claw 7 Recessed portion (first recessed portion)
8 Second locking member 8-1 Second locking claw 9 Recess (second recess)

Claims (3)

給紙カセット内で底板に載置された不定形サイズ紙または定形サイズ紙の幅方向端面に対して進退自在に支持されたサイドフェンスを有する給紙装置において、
不定形サイズ紙を所定の位置にセットする際のサイドフェンス位置決め用の第一係止爪を有する第一係止部材と、
定形サイズ紙を所定の位置にセットする際のサイドフェンス位置決め用の第二係止爪を有する第二係止部材と、
一係止爪が係脱可能な、前記給紙カセットの底板に用紙幅方向に形成された第一の凹部と、
二係止爪が係脱可能な、前記給紙カセットの底板に第一の凹部列と平行に形成された第二2の凹部列と、を有し、
第一係止部材は、前記サイドフェンスの外側に軸を中心に揺動可能に設けられ、第二係止部材は、前記サイドフェンスと第一係止部材との間に上下動可能に設けられ、
第一及び第二係止部材は、第一係止爪が第一の凹部列に、第二係止爪が第2の凹部列に、それぞれ係合する向きにばねにより付勢され、
第一係止部材は、前記軸よりも上部に第二係止部材との係合部を有し、
前記係合部は、第一係止爪を第一の凹部列から離脱させる向きに、第一係止部材の上部を用紙幅方向内側に揺動させたとき、第二係止部材をその付勢力に抗して上方に移動させるためのテーパ部を有することを特徴とする給紙装置。
In a paper feeding device having a side fence supported so as to be movable back and forth with respect to the widthwise end surface of the irregular size paper or the standard size paper placed on the bottom plate in the paper feed cassette,
A first locking member having a first locking claw for positioning the side fence when setting the irregular size paper at a predetermined position;
A second locking member having a second locking claw for positioning the side fence when setting the standard size paper at a predetermined position;
A first recessed row formed in the paper width direction on the bottom plate of the paper feed cassette, the first locking claw being detachable ;
A second locking claw capable of being engaged and disengaged , and having a second recess row formed in parallel to the first recess row on the bottom plate of the paper feed cassette ,
The first locking member is provided on the outer side of the side fence so as to be swingable about an axis, and the second locking member is provided between the side fence and the first locking member so as to be vertically movable. ,
The first and second locking members are biased by a spring in a direction in which the first locking claw is engaged with the first recess row and the second locking claw is engaged with the second recess row, respectively.
The first locking member has an engagement portion with the second locking member above the shaft,
The engaging portion attaches the second locking member when the upper portion of the first locking member is swung inward in the paper width direction so as to disengage the first locking claw from the first recess row. A paper feeding device having a tapered portion for moving upward against a force .
請求項1記載の給紙装置において、第二係止部材は前記サイドフェンスに形成された嵌合孔に上下動可能に嵌合し、その上方からバネで下方に付勢されていることを特徴とする給紙装置。 2. The sheet feeding device according to claim 1, wherein the second locking member is fitted in a fitting hole formed in the side fence so as to be vertically movable, and is biased downward by a spring from above. A paper feeder. 請求項1または2記載の給紙装置を備えたことを特徴とする画像形成装置。   An image forming apparatus comprising the sheet feeding device according to claim 1.
JP2006011686A 2006-01-19 2006-01-19 Paper feeding device and image forming apparatus Expired - Fee Related JP4701091B2 (en)

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JP5207831B2 (en) * 2008-05-29 2013-06-12 キヤノン株式会社 Sheet feeding apparatus and image forming apparatus
JP4740295B2 (en) 2008-08-26 2011-08-03 株式会社沖データ Paper feeding device and image forming apparatus
JP5447953B2 (en) * 2009-12-22 2014-03-19 株式会社リコー Paper feeding device and image forming apparatus
JP6333096B2 (en) * 2014-07-11 2018-05-30 キヤノン株式会社 Sheet storage device and image forming apparatus
JP6537254B2 (en) * 2014-12-04 2019-07-03 キヤノン株式会社 Sheet stacking apparatus and image forming apparatus
JP7159711B2 (en) * 2018-09-06 2022-10-25 京セラドキュメントソリューションズ株式会社 Paper supply unit, image forming device

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JP2005035715A (en) * 2003-07-18 2005-02-10 Konica Minolta Business Technologies Inc Sheet feeder and image forming device equipped with it
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JP2004123292A (en) * 2002-10-01 2004-04-22 Canon Inc Sheet storage device and image forming device equipped therewith
JP2005035715A (en) * 2003-07-18 2005-02-10 Konica Minolta Business Technologies Inc Sheet feeder and image forming device equipped with it
JP2005082377A (en) * 2003-09-10 2005-03-31 Fuji Xerox Co Ltd Sheet feeder and sheet handling device using the sheet feeder

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