JP4780947B2 - Document crimping plate opening and closing device - Google Patents

Document crimping plate opening and closing device Download PDF

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JP4780947B2
JP4780947B2 JP2004322863A JP2004322863A JP4780947B2 JP 4780947 B2 JP4780947 B2 JP 4780947B2 JP 2004322863 A JP2004322863 A JP 2004322863A JP 2004322863 A JP2004322863 A JP 2004322863A JP 4780947 B2 JP4780947 B2 JP 4780947B2
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document crimping
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JP2006133532A (en
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直和 鈴木
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加藤電機株式会社
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Description

本発明は、複写機、印刷機、ファクシミリ、スキャナー等に用いて好適な原稿圧着板開閉装置に関するものである。   The present invention relates to a document pressure plate opening / closing device suitable for use in a copying machine, a printing machine, a facsimile machine, a scanner, or the like.

複写機、印刷機、ファクシミリ、スキャナー等の本体には、その本体の上面後部に対し原稿圧着板が原稿圧着板開閉装置を介して回動可能に取り付けられている。原稿圧着板開閉装置は、一種のヒンジ機構であり、原稿圧着板をヒンジ軸まわりに回動可能に軸支して、本体の上面のコンタクトガラス面上に原稿圧着板を密着させることができると共に、そのコンタクトガラスを露出させることができる。原稿をコンタクトガラス面上にセットするには、原稿圧着板を回動させて（上方に移動させて）コンタクトガラス面を露出（開放）させ、そのコンタクトガラスの面上に原稿を載置した後、原稿圧着板を逆方向に回動させて（下方に移動させて）、原稿圧着板で原稿をコンタクトガラス面上に圧着させることにより、原稿をコンタクトガラス面上にセットすることができる。   In a main body of a copying machine, a printing machine, a facsimile machine, a scanner, or the like, a document pressing plate is attached to a rear portion of the upper surface of the main body via a document pressing plate opening / closing device. The document crimping plate opening / closing device is a kind of hinge mechanism. The document crimping plate is pivotally supported around a hinge axis so that the document crimping plate can be brought into close contact with the contact glass surface on the upper surface of the main body. The contact glass can be exposed. To set the document on the contact glass surface, rotate the document crimping plate (move upward) to expose (open) the contact glass surface, and place the document on the contact glass surface. The original can be set on the contact glass surface by rotating the original pressure plate in the opposite direction (moving downward) and pressing the original on the contact glass surface with the original pressure plate.

この原稿圧着板開閉装置は、弾性手段の付勢力によりその本来の重量を感じさせることなく原稿圧着板を回動させることができ、所定の開成角度で安定的に停止保持してコンタクトガラス上への原稿の交換作業を容易にさせることができるものであったが、原稿をコンタクトガラス面上へセットするとき、例えば約１０°前後の閉成角度より原稿圧着板が自動的に閉じて、原稿をコンタクトガラス面上へ密着させるようにすることを要求されることから、原稿圧着板が約２０°前後の閉成角度以下のとき、弾性手段の付勢力が原稿圧着板の重量より弱くなっている。その結果、原稿圧着板を閉じるとき（下方に回動するとき）、原稿圧着板が急激に落下し易く（速い速度で回動し易く）、手を挟んだり風圧で原稿の位置がずれてしまう場合があった。   This original pressure plate opening / closing device can rotate the original pressure plate without feeling its original weight by the biasing force of the elastic means, and stably stops and holds the original pressure plate on the contact glass at a predetermined opening angle. However, when the original is set on the contact glass surface, the original pressure plate is automatically closed from a closing angle of about 10 °, for example. Since the pressing force of the elastic means is weaker than the weight of the original pressure-bonding plate when the original pressure-bonding plate is less than the closing angle of about 20 °. Yes. As a result, when the original cover is closed (turned downward), the original cover is likely to drop abruptly (easily turns at a high speed), and the position of the original is displaced by the hand pressure or wind pressure. There was a case.

このため、原稿圧着板の所定閉成角度からの急激な回動を防止するために、所定閉成角度以下においてのみ動作する流体ダンパ装置を備えた原稿圧着板開閉装置が提案された（例えば、特許文献１参照。）。この原稿圧着板開閉装置は、原稿圧着板を閉じる方向に回動させる場合、最初は弾性手段の弾力の影響を受けることなく閉じられ、例えば約６０°の閉成角度より弾性手段の弾力による影響を受けるが少し力を加えることによって閉じられ、約２０°の閉成角度からは原稿圧着板の重量が勝り始めて急速に勢いをつけて回動し始めるが、約１０°の閉成角度にくると、流体ダンパ装置によって原稿圧着板の回動速度が制御されるので、その回動の勢いがそがれ、静かに原稿圧着板が閉じる方向に回動する。
実用新案登録第２５８９７１４号公報 For this reason, in order to prevent the document crimping plate from rotating suddenly from a predetermined closing angle, a document crimping plate opening / closing device including a fluid damper device that operates only at a predetermined closing angle or less has been proposed (for example, (See Patent Document 1). When the original cover is turned in the closing direction, the original cover is closed without being affected by the elastic force of the elastic means. For example, the influence of the elastic means of the elastic means from the closing angle of about 60 °. However, it is closed by applying a little force, and from the closing angle of about 20 °, the weight of the original pressing plate starts to win and rapidly starts to turn, but comes to a closing angle of about 10 °. Then, since the rotation speed of the original cover is controlled by the fluid damper device, the rotational force is deviated and the original cover is gently rotated in the closing direction.
Utility Model Registration No. 2558914

ところで、前述した公知の原稿圧着板開閉装置では、流体ダンパ装置によって原稿圧着板の回動速度が制御されるので、その回動速度の勢いがそがれ、静かに原稿圧着板が閉じる方向に回動するが、流体ダンパ装置による原稿圧着板の回動速度が弱いと、原稿圧着板がコンタクトガラス面から浮いて原稿をコンタクトガラス面に圧着させることができなかったりすることがある。また、原稿圧着板開閉装置に自動原稿送り装置が備えられているものでは、自動原稿送り装置の紙送りローラや原稿押え板等がコンタクトガラス面から浮いて紙の自動送りを行えないこともあり得る。   By the way, in the known document crimping plate opening / closing device described above, the rotation speed of the document crimping plate is controlled by the fluid damper device, so the momentum of the rotation speed is staggered and the document crimping plate is gently rotated in the closing direction. However, if the rotation speed of the original pressure bonding plate by the fluid damper device is low, the original pressure bonding plate may float from the contact glass surface and the original document may not be pressure bonded to the contact glass surface. In addition, if the document crimping plate opening / closing device is equipped with an automatic document feeder, the paper feeder roller or document retainer of the automatic document feeder may float from the contact glass surface, preventing automatic paper feeding. obtain.

本発明は、前記課題を解決するためになされたものであって、その目的は、原稿圧着板の回動速度を制御すると共に、閉成時において原稿圧着板が本体より浮くことなく本体に密着させることができる原稿圧着板開閉装置を提供することにある。   The present invention has been made to solve the above-mentioned problems, and its purpose is to control the rotation speed of the original cover and to close the original cover without floating from the main body when closed. It is an object of the present invention to provide a document crimping plate opening / closing device that can be operated.

前記目的を達成するために本発明の原稿圧着板開閉装置は、複写機、印刷機、ファクシミリ、スキャナー等の本体に取り付けられる取付部材と、その取付部材に回動自在に連結され、原稿圧着板に取り付けられて原稿圧着板を開閉可能に支持する支持部材と、前記取付部材と前記支持部材との間に設けられ、前記原稿圧着板を開成方向に回動付勢すると共に、前記原稿圧着板が所定の閉成角度以下のとき、前記原稿圧着板を付勢する付勢力が前記原稿圧着板の重量より弱い弾性手段と、前記取付部材と前記支持部材との間に設けられ、前記原稿圧着板が閉成方向に回動したとき、前記原稿圧着板の前記所定の閉成角度以下においてのみ動作して前記原稿圧着板の回動速度を低減する流体ダンパ装置とを備えた原稿圧着板開閉装置であって、前記流体ダンパ装置は、内部に流体が充填された蓋体付きのシリンダと、このシリンダ内に設けられ前記シリンダ内部を２つの第１流体室と第２流体室に仕切るところの軸方向へ移動付勢されたピストンと、このピストンへ取り付けられその一端側を前記シリンダの蓋体外へシール部材を介して突出させたピストンロッドとを有し、前記ピストンロッドの動作時に前記シリンダと前記ピストンの間で前記第１及び第２流体室の一方のものから他方のものへ流体を移動させて前記原稿圧着板の落下速度を緩衝させるように構成すると共に、前記シリンダ内壁にその内径を拡張させてシリンダ凹部を設け、前記ピストンの外周に所定間隔を空けて複数のピストン凹部をその一端部から中ほどまで設け、もって前記原稿圧着板の落下緩衝効果が動作途中から小さくなるように成したことを特徴とする。 In order to achieve the above object, a document crimping plate opening / closing apparatus according to the present invention includes a mounting member attached to a main body of a copying machine, a printing machine, a facsimile machine, a scanner, and the like, and a document crimping plate rotatably connected to the mounting member. A supporting member that is attached to the supporting member so as to be openable and closable, and is provided between the mounting member and the supporting member, and urges the document pressing plate to rotate in the opening direction, and the document pressing plate. Is provided between the mounting member and the support member, and the biasing force for biasing the original cover is weaker than the weight of the original cover, and the original cover. A document crimping plate opening and closing mechanism comprising a fluid damper device that operates only when the document crimping plate is not more than the predetermined closing angle when the plate rotates in the closing direction and reduces the rotational speed of the document crimping plate. an apparatus, before The fluid damper device includes a cylinder with a lid filled with a fluid inside, and an axially moving bias that is provided in the cylinder and divides the inside of the cylinder into two first fluid chambers and a second fluid chamber. And a piston rod attached to the piston and projecting one end of the piston to the outside of the lid of the cylinder via a seal member, and the piston rod is moved between the cylinder and the piston during operation of the piston rod. The fluid is moved from one of the first and second fluid chambers to the other to cushion the falling speed of the original pressure plate, and the inner diameter of the cylinder inner wall is expanded to form a cylinder recess. A plurality of piston recesses are provided from one end to the middle at a predetermined interval on the outer periphery of the piston, so that the fall buffering effect of the original crimping plate is in operation. Characterized in that form so that small a.

この発明によれば、流体ダンパ装置が備えられているために、原稿圧着板を閉じる方向（閉成方向ということがある。）に回動させた場合、原稿圧着板が所定の閉成角度以下になると、流体ダンパ装置が動作して原稿圧着板の回動速度が低減され、静かに原稿圧着板が閉じる方向に回動して本体に密着する。本体に原稿圧着板が密着するときには、流体ダンパ装置が原稿圧着板の回動速度を低減する緩衝効果が動作途中から小さくなるように構成されているために、流体ダンパ装置の緩衝効果が小さいので、原稿圧着板が本体から浮くことなく密着する。   According to the present invention, since the fluid damper device is provided, when the original pressure plate is rotated in the closing direction (sometimes referred to as a closing direction), the original pressure plate is below a predetermined closing angle. Then, the fluid damper device operates to reduce the rotation speed of the original cover, and gently closes the original cover so that the original cover is in close contact with the main body. When the document crimping plate is in close contact with the main body, the buffer effect of the fluid damper device is small because the fluid damper device is configured so that the buffering effect of reducing the rotation speed of the document crimping plate is reduced from the middle of operation. The original cover is brought into close contact with the main body without floating.

本発明の原稿圧着板開閉装置において、前記弾性手段を、前記支持部材内に嵌合された一対のスライダーと、これらのスライダー内に設けられた圧縮コイルスプリングで構成し、前記流体ダンパ装置を前記圧縮コイルスプリングの中に設けたことを特徴とする。また、本発明の原稿圧着板開閉装置において、前記支持部材にはさらに、その自由端側に前記原稿圧着板を取り付けるリフト部材が一方向へ回転付勢されて取り付けられていることを特徴とする。 In the document crimping plate opening and closing device of the present invention, the elastic means is composed of a pair of sliders fitted in the support member and a compression coil spring provided in these sliders, and the fluid damper device is It is provided in a compression coil spring. In the document crimping plate opening and closing device of the present invention, a lift member for mounting the document crimping plate is attached to the support member by being urged to rotate in one direction on the free end side thereof. .

以上説明したように本発明に係る原稿圧着板開閉装置によれば、原稿圧着板が所定の閉成角度以下になると、流体ダンパ装置が動作して原稿圧着板の回動速度が低減され、原稿圧着板の回動速度を制御すると共に、流体ダンパ装置が原稿圧着板の回動速度を低減する緩衝効果が動作途中から小さくなるように構成されているので、原稿圧着板が本体より浮くことなく本体に密着させることができる。   As described above, according to the document crimping plate opening and closing device according to the present invention, when the document crimping plate becomes a predetermined closing angle or less, the fluid damper device operates to reduce the rotation speed of the document crimping plate. While controlling the rotational speed of the crimping plate, the fluid damper device is configured so that the buffering effect of reducing the rotational speed of the original crimping plate is reduced from the middle of the operation, so that the original crimping plate does not float from the main body. It can be brought into close contact with the body.

以下、本発明に係る原稿圧着板開閉装置を添付図面に基づいて詳述する。
図１〜図３は本発明に係る原稿圧着板開閉装置の一例を示す図である。本発明に係る原稿圧着板開閉装置は、複写機、印刷機、ファクシミリ、スキャナー等の本体に、その本体の上面のコンタクトガラス２０に対し原稿圧着板を回動可能に取り付けるものである。本発明に係る原稿圧着板開閉装置は、図１〜図３に示すように、本体２に取り付けられる取付部材４と、その取付部材４に回動自在に連結され、原稿圧着板３に取り付けられて原稿圧着板３を開閉可能に支持する支持部材５と、取付部材４と支持部材５との間に設けられ、原稿圧着板３を開成方向に回動付勢すると共に、原稿圧着板３が所定の閉成角度以下のとき、原稿圧着板３を付勢する付勢力が原稿圧着板３の重量より弱い弾性手段７と、取付部材４と支持部材５との間に設けられ、原稿圧着板３が閉成方向に回動したとき、原稿圧着板３の所定の閉成角度以下においてのみ動作する流体ダンパ装置８とを備えている。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a document crimping plate opening / closing device according to the present invention will be described in detail with reference to the accompanying drawings.
1 to 3 are views showing an example of a document pressing plate opening / closing device according to the present invention. The document crimping plate opening / closing apparatus according to the present invention is a device that rotatably attaches a document crimping plate to a contact glass 20 on the upper surface of a copying machine, printing machine, facsimile, scanner, or the like. As shown in FIGS. 1 to 3, the document crimping plate opening and closing device according to the present invention is attached to the body 2 and is attached to the document crimping plate 3 by being rotatably connected to the mounting member 4. A support member 5 that supports the document crimping plate 3 so that the document crimping plate 3 can be opened and closed, and is provided between the mounting member 4 and the support member 5 to rotate and bias the document crimping plate 3 in the opening direction. When the angle is equal to or less than a predetermined closing angle, the biasing force for biasing the document crimping plate 3 is provided between the elastic member 7 whose weight is less than the weight of the document crimping plate 3, the mounting member 4 and the support member 5, and the document crimping plate. And a fluid damper device 8 that operates only when the original pressing plate 3 is not more than a predetermined closing angle when the document 3 is rotated in the closing direction.

取付部材４は、本体２に取り付けられる底板４１と、底板４１の両側端部からそれぞれ底板４１に対して直交する方向（略直交する方向も含む。）に延びる両側板４２と、底板４１の一端部（後端部）から底板４１に対して直交する方向（略直交する方向も含む。）に延びる略矩形状の後板４３と、からなる。   The attachment member 4 includes a bottom plate 41 attached to the main body 2, both side plates 42 extending from both side end portions of the bottom plate 41 in a direction orthogonal to the bottom plate 41 (including a substantially orthogonal direction), and one end of the bottom plate 41. A substantially rectangular rear plate 43 extending from a portion (rear end portion) in a direction orthogonal to the bottom plate 41 (including a substantially orthogonal direction).

底板４１は、略矩形状に形成され、ビス等で本体２に取り付けられている。側板４２は、略Ｌ字状に形成され、底板４１に対して直交する方向（略直交する方向も含む。）に延びる取付片４２ａの先端部（上部）に第１ヒンジピン孔４６が設けられている。取付片４２ａの第１ヒンジピン孔４６より底板４１側（下方）で、かつ、内側（前方）に偏した位置には固定ピン孔４７が設けられている。両取付片４２ａの固定ピン孔４７に固定ピン１３が挿通されている。また、取付片４２ａの先端面は、第１ヒンジピン孔４６と固定ピン孔４７とを結ぶ直線と略平行に延びる傾斜部４２ｂとして形成されている。   The bottom plate 41 is formed in a substantially rectangular shape and is attached to the main body 2 with screws or the like. The side plate 42 is formed in a substantially L shape, and a first hinge pin hole 46 is provided at the tip (upper part) of the mounting piece 42a extending in a direction orthogonal to the bottom plate 41 (including a direction substantially orthogonal). Yes. A fixing pin hole 47 is provided at a position biased toward the bottom plate 41 side (downward) and inward (frontward) from the first hinge pin hole 46 of the mounting piece 42a. The fixing pin 13 is inserted into the fixing pin hole 47 of both the attachment pieces 42a. Further, the front end surface of the mounting piece 42 a is formed as an inclined portion 42 b that extends substantially parallel to a straight line connecting the first hinge pin hole 46 and the fixing pin hole 47.

支持部材５は、上板５１と、上板５１の両側端部からそれぞれ上板５１に対して直交する方向（略直交する方向も含む。）に延びる両側板５２と、側板５２の先端部を互いに対向する側に９０°折り曲げてなる案内板５３と、からなる。上板５１の他端部（前端部）は、側板５２と反対方向に折り曲げてなるストッパ部５５が設けられている。   The support member 5 includes an upper plate 51, both side plates 52 extending from both side end portions of the upper plate 51 in a direction orthogonal to the upper plate 51 (including a direction substantially orthogonal), and a front end portion of the side plate 52. And a guide plate 53 that is bent by 90 ° on opposite sides. The other end portion (front end portion) of the upper plate 51 is provided with a stopper portion 55 that is bent in a direction opposite to the side plate 52.

両側板５２の一端部（後端部）には、第２ヒンジピン１２が挿通される第２ヒンジピン孔５７が設けられていると共に、後述する作動ピン１４が入り込む切欠部５４が設けられている。両側板５２の他端部（前端部）には、第１ヒンジピン挿通孔（図示せず）が設けられている。両側板５２の第１ヒンジピン挿通孔と取付部材４の第１ヒンジピン孔４６とが軸合わせされてこれら孔４６に第１ヒンジピン１１が挿通されることによって、支持部材５が取付部材４に第１ヒンジピン１１を軸に回動自在に連結されている。   A first hinge pin hole 57 through which the second hinge pin 12 is inserted is provided at one end portion (rear end portion) of the both side plates 52, and a notch portion 54 into which an operation pin 14 described later is inserted. A first hinge pin insertion hole (not shown) is provided at the other end (front end) of the side plates 52. The first hinge pin insertion hole of the both side plates 52 and the first hinge pin hole 46 of the attachment member 4 are aligned with each other, and the first hinge pin 11 is inserted into these holes 46, whereby the support member 5 is first attached to the attachment member 4. The hinge pin 11 is pivotally connected about an axis.

支持部材５は、原稿圧着板３に取り付けられるが、原稿圧着板３に回動自在に取り付けられることが好ましい。このように、支持部材５が原稿圧着板３に回動自在に取り付けられることにより、厚さが厚い原稿も本体２の上面に安定して密着させることができる。また、支持部材５は、原稿圧着板３に直接取り付けてもよいが、リフト部材６を介して原稿圧着板３に取り付けられることが好ましい。   The support member 5 is attached to the original cover 3, but is preferably attached to the original cover 3 so as to be rotatable. As described above, the support member 5 is pivotally attached to the original cover 3 so that a thick original can be stably adhered to the upper surface of the main body 2. The support member 5 may be directly attached to the original cover 3, but is preferably attached to the original cover 3 via a lift member 6.

リフト部材６は、原稿圧着板３の後端側にビス等で取り付けられる上板６１と、この上板６１の両端部からそれぞれ上板６１に対して直交する方向（略直交する方向も含む。）に延びる両側板６２とから略コ字状であって支持部材５を覆うように形成されている。リフト部材６の一端部（後端部）の中央より上板６１側の箇所には第２ヒンジピン挿通孔（図示せず）が設けられていると共に、第２ヒンジピン挿通孔より他端部側で、かつ、中央より上板６１側とは反対側の箇所には作動ピン１４が挿通される作動ピン孔（図示せず）が設けられている。両側板６２の作動ピン孔に作動ピン１４が挿通されて固定されている。リフト部材６の両側板６２の第２ヒンジピン挿通孔と支持部材５の両側板５２の第２ヒンジピン孔とが軸合わせされてこれら孔に第２ヒンジピン１２が挿通されることによって、リフト部材６と支持部材５とが第２ヒンジピン１２を軸に互いに回動自在に連結されている。   The lift member 6 includes an upper plate 61 that is attached to the rear end side of the document pressing plate 3 with screws or the like, and directions that are orthogonal to the upper plate 61 from both ends of the upper plate 61 (a direction that is substantially orthogonal). ) And both side plates 62 are formed in a substantially U shape so as to cover the support member 5. A second hinge pin insertion hole (not shown) is provided at a position closer to the upper plate 61 than the center of one end (rear end) of the lift member 6, and on the other end side from the second hinge pin insertion hole. In addition, an operation pin hole (not shown) through which the operation pin 14 is inserted is provided at a position opposite to the upper plate 61 side from the center. The operating pin 14 is inserted and fixed in the operating pin hole of the both side plates 62. The second hinge pin insertion hole of the both side plates 62 of the lift member 6 and the second hinge pin hole of the both side plates 52 of the support member 5 are aligned with each other, and the second hinge pin 12 is inserted into these holes, so that the lift member 6 The support member 5 is coupled to the second hinge pin 12 so as to be rotatable with respect to each other.

弾性手段７は、原稿圧着板３を開成方向に回動付勢すると共に、原稿圧着板３が所定の閉成角度以下のとき、原稿圧着板３を付勢する付勢力が原稿圧着板３の重量より弱いものである。弾性手段７は、例えば、支持部材５内に嵌合されている一対のスライダー７１、７２と、これらの一対のスライダー７１、７２内に設けられている圧縮コイルスプリング７３とからなる。   The elastic means 7 urges the document crimping plate 3 to rotate in the opening direction, and when the document crimping plate 3 is below a predetermined closing angle, the urging force for urging the document crimping plate 3 is applied to the document crimping plate 3. It is weaker than weight. The elastic means 7 includes, for example, a pair of sliders 71 and 72 fitted in the support member 5 and a compression coil spring 73 provided in the pair of sliders 71 and 72.

一対のスライダー７１、７２は、断面矩形の有底筒体状に形成されている。一対のスライダー７１、７２は、互いの開口部が向き合うように支持部材５内にそれぞれ個別に摺動自在に嵌合されて、この一対のスライダー７１、７２内に圧縮コイルスプリング７３が収容されている。一対のスライダー７１、７２は、取付部材４の底板４１と支持部材５（上板５１）が略平行になっているとき（例えば本体２のコンタクトガラス２０の面上に原稿圧着板３を密着させたとき（原稿圧着板密着時））、支持部材５内に嵌合される長さで形成されている。   The pair of sliders 71 and 72 is formed in a bottomed cylindrical shape having a rectangular cross section. The pair of sliders 71 and 72 are individually slidably fitted into the support member 5 so that their openings face each other, and a compression coil spring 73 is accommodated in the pair of sliders 71 and 72. Yes. The pair of sliders 71 and 72 is configured such that when the bottom plate 41 of the mounting member 4 and the support member 5 (upper plate 51) are substantially parallel (for example, the original pressing plate 3 is brought into close contact with the surface of the contact glass 20 of the main body 2). (When the original pressure plate is in close contact), it is formed with a length that fits into the support member 5.

圧縮コイルスプリング７３は、その個数は特に限定されず、１個でも２個以上でもよく、例えば２個並列に設けられ、一対のスライダー７１、７２をそれぞれ互いに離間する方向に付勢するものである。圧縮コイルスプリング７３は、原稿圧着板３を開成方向に回動付勢すると共に、原稿圧着板３が所定の閉成角度（例えば、２０°（２０°前後も含む。））以下のとき、原稿圧着板３を付勢する付勢力が原稿圧着板３の重量より弱いものである。   The number of the compression coil springs 73 is not particularly limited, and may be one or two or more. For example, two compression coil springs 73 are provided in parallel and urge the pair of sliders 71 and 72 in directions away from each other. . The compression coil spring 73 urges the document crimping plate 3 in the opening direction, and when the document crimping plate 3 is below a predetermined closing angle (for example, 20 ° (including around 20 °)). The urging force for urging the pressure plate 3 is weaker than the weight of the original pressure plate 3.

先端部側のスライダー（第１スライダー）７１の底面である閉塞面７１ａの外表面は平坦面に形成されている。この閉塞面７１ａが圧縮コイルスプリング７３の付勢力によって作動ピン１４を押圧して、支持部材５とリフト部材６とが重なり合うようになっている。すなわち、圧縮コイルスプリング７３の付勢力によってリフト部材６の上板６１が支持部材５のストッパ部５５に当接して、支持部材５の上板５１とリフト部材６の上板６１とが略平行で、かつ近接するようになっている。   The outer surface of the closing surface 71a, which is the bottom surface of the slider (first slider) 71 on the tip side, is formed as a flat surface. The closing surface 71 a presses the operating pin 14 by the urging force of the compression coil spring 73 so that the support member 5 and the lift member 6 overlap each other. That is, the upper plate 61 of the lift member 6 comes into contact with the stopper portion 55 of the support member 5 by the biasing force of the compression coil spring 73, and the upper plate 51 of the support member 5 and the upper plate 61 of the lift member 6 are substantially parallel. , And come close.

後端部側のスライダー（第２スライダー）７２の底部の外表面の略中央部には、突部７２ａが設けられている。この突部７２ａは、支持部材５の上板５１に略平行に延びて形成されている。突部７２ａの案内板５３側の第２スライダー７２の底部外表面は漸次傾斜された傾斜部７２ｂとして形成されている。この第２スライダー７２の底部の外表面の突部７２ａ及び傾斜部７２ｂが１種のカムとして形成されている。   A protrusion 72 a is provided at a substantially central portion of the outer surface of the bottom portion of the slider (second slider) 72 on the rear end side. The protrusion 72 a is formed to extend substantially parallel to the upper plate 51 of the support member 5. The bottom outer surface of the second slider 72 on the guide plate 53 side of the protrusion 72a is formed as an inclined portion 72b that is gradually inclined. A protrusion 72a and an inclined portion 72b on the outer surface of the bottom portion of the second slider 72 are formed as one kind of cam.

すなわち、本体２のコンタクトガラス２０の面上に原稿圧着板３が密着している状態（閉位置（図１参照。））から原稿圧着板３を本体２から離間する方向（上方）に第１ヒンジピン１１を軸に回動させると、固定ピン１３に当接する箇所が突部７２ａから傾斜部７２ｂへと徐々に摺動すると共に、第２スライダー７２が圧縮コイルスプリング７３によって支持部材５内を後端部側へと押圧されて摺動し、圧縮コイルスプリング７３が徐々に伸びる。そして、原稿圧着板３が本体２の上面に対する最大使用開放位置になると（図２参照。）、その回動が原稿圧着板回動規制機構（図示せず）によって規制される。なお、図１〜図３中、符号７２ｃは延出片を示し、この延出片７２ｃと第２スライダー７２を形成する壁部との間に、案内板５３が位置されるようになっている。   That is, the first side of the original pressure plate 3 is separated from the main body 2 (upward) from the state where the original pressure plate 3 is in close contact with the surface of the contact glass 20 of the main body 2 (closed position (see FIG. 1)). When the hinge pin 11 is rotated around the shaft, the portion that contacts the fixed pin 13 gradually slides from the projecting portion 72a to the inclined portion 72b, and the second slider 72 is moved back in the support member 5 by the compression coil spring 73. The compression coil spring 73 is gradually extended by being pressed and slid toward the end side. When the document pressing plate 3 reaches the maximum use open position with respect to the upper surface of the main body 2 (see FIG. 2), its rotation is restricted by a document pressing plate rotation restricting mechanism (not shown). 1 to 3, reference numeral 72 c denotes an extended piece, and the guide plate 53 is positioned between the extended piece 72 c and the wall portion forming the second slider 72. .

流体ダンパ装置８は、原稿圧着板３が閉成方向に回動したとき、原稿圧着板３の所定の閉成角度以下（例えば１０°前後以下）においてのみその原稿圧着板３の回動速度を低減させるように動作するもので、その原稿圧着板３の回動速度を低減する緩衝効果が動作途中から小さくなるように構成されている。この原稿圧着板３の回動速度を低減する緩衝効果が動作途中から小さくなることが本発明の特徴部分である。   When the original pressure plate 3 rotates in the closing direction, the fluid damper device 8 increases the rotation speed of the original pressure plate 3 only when the original pressure plate 3 is less than a predetermined closing angle (for example, around 10 ° or less). It operates so as to reduce, and the buffering effect for reducing the rotation speed of the original cover 3 is configured to be reduced from the middle of the operation. It is a characteristic part of the present invention that the buffering effect for reducing the rotation speed of the original cover 3 is reduced during the operation.

流体ダンパ装置８は、例えば、オイルダンパ装置等であり、圧縮コイルスプリング７３内に設けられている。流体ダンパ装置８は、例えば、図４及び図５に示すように、シリコンオイル等のオイル８５が充填されているシリンダ８１と、シリンダ８１内に移動可能に設けられ、ピストンロッド８３が連結されているピストン８２とから主に構成されている。   The fluid damper device 8 is, for example, an oil damper device or the like, and is provided in the compression coil spring 73. As shown in FIGS. 4 and 5, for example, the fluid damper device 8 is provided with a cylinder 81 filled with an oil 85 such as silicon oil, and is movably provided in the cylinder 81, and a piston rod 83 is connected to the fluid damper device 8. It is mainly composed of a piston 82.

シリンダ８１は、例えば、有底円筒体状に形成されている。シリンダ８１の底部はフランジ状に形成され、このフランジ状の底部が、例えば、第１スライダー７１の底部の内面に着脱可能に固定されている。すなわち、シリンダ８１は、圧縮コイルスプリング７３内に設けられ、シリンダ８１つまり流体ダンパ装置８は全ての圧縮コイルスプリング７３内に設けてもよいし、任意の圧縮コイルスプリング７３内に設けるようにしてもよく、例えば、１つの、圧縮コイルスプリング７３内に設けられている。シリンダ８１の径は、圧縮コイルスプリング７３内に設けることができれば特に限定されない。また、シリンダ８１の長さ（長手方向（軸方向）の長さ）は、特に限定されないが、例えば、一対の第１、第２スライダー７１、７２の間隔が一番狭くなったときに、シリンダ８１の開口部が、第２スライダー７２の底部の内面７２ｄ（図１〜図３参照。）の近くに位置される寸法に形成されている。シリンダ８１の開口部には、蓋体８４が密封状態で設けられている。   The cylinder 81 is formed in a bottomed cylindrical body, for example. The bottom portion of the cylinder 81 is formed in a flange shape, and this flange-shaped bottom portion is detachably fixed to the inner surface of the bottom portion of the first slider 71, for example. That is, the cylinder 81 is provided in the compression coil spring 73, and the cylinder 81, that is, the fluid damper device 8 may be provided in all the compression coil springs 73, or may be provided in any compression coil spring 73. For example, it is provided in one compression coil spring 73. The diameter of the cylinder 81 is not particularly limited as long as it can be provided in the compression coil spring 73. The length of the cylinder 81 (length in the longitudinal direction (axial direction)) is not particularly limited. For example, when the distance between the pair of first and second sliders 71 and 72 is the narrowest, the cylinder An opening 81 is formed to have a dimension positioned near the inner surface 72 d (see FIGS. 1 to 3) of the bottom of the second slider 72. A lid 84 is provided in a sealed state at the opening of the cylinder 81.

ピストン８２は、図４〜図６に示すように、略円柱状に形成されている。ピストン８２は、シリンダ８１内にシリンダ８１と略同軸上にその軸方向に移動可能に設けられている。このピストン８２によってシリンダ８１内がその軸方向に第１流体室８６と第２流体室８７とに仕切られる。ピストン８２の径及び長さ（軸方向の長さ）は、原稿圧着板３の回動速度を低減する緩衝効果を奏し得る範囲から任意に選択される。シリンダ８１の開口部側のピストン８２の面には、ピストンロッド８３を同軸上（略同軸上を含む。）に取り付けるロッド取付部８２ａが設けられている。また、ピストン８２の残りの面は、凹状に形成され、この凹部内にスプリング座８８が設けられている。このスプリング座８８とシリンダ８１の底部の内面８１ａとの間に常時ピストン８２をシリンダ８１の開口部側に付勢するコンプレッションスプリング８９が設けられている。   The piston 82 is formed in a substantially cylindrical shape as shown in FIGS. The piston 82 is provided in the cylinder 81 so as to be movable in the axial direction substantially coaxially with the cylinder 81. The piston 82 partitions the inside of the cylinder 81 into a first fluid chamber 86 and a second fluid chamber 87 in the axial direction. The diameter and length (length in the axial direction) of the piston 82 are arbitrarily selected from a range in which a buffering effect for reducing the rotation speed of the original cover 3 can be obtained. On the surface of the piston 82 on the opening side of the cylinder 81, a rod attachment portion 82a for attaching the piston rod 83 coaxially (including substantially coaxially) is provided. The remaining surface of the piston 82 is formed in a concave shape, and a spring seat 88 is provided in the concave portion. A compression spring 89 is provided between the spring seat 88 and the inner surface 81 a of the bottom of the cylinder 81 to constantly urge the piston 82 toward the opening of the cylinder 81.

ピストンロッド８３は、第２流体室８７内を延び、その先端部が蓋体８４のロッド貫通孔８４ａを介してシリンダ８１の外方に延びている。ロッド貫通孔８４ａの近傍から先端部までのピストンロッド８３の外周には、ピストンロッド８３を覆うようにロッド部９５が気密状態に取り付けられている。ロッド部９５は、実質的にはピストンロッドであり、円筒状に形成されている。ロッド部９５のシリンダ８１内の外周には、ロッド貫通孔８４ａの径より大径のストッパ部９６が設けられ、ピストン８２及びピストンロッド８３がシリンダ８１内からその開口端部側へ移動することが規制される。なお、蓋体８４とロッド部９５との間には、Ｏリング等のシール材（図示せず）が設けられている。   The piston rod 83 extends in the second fluid chamber 87, and a tip portion thereof extends outward of the cylinder 81 through a rod through hole 84 a of the lid body 84. A rod portion 95 is attached to the outer periphery of the piston rod 83 from the vicinity of the rod through hole 84a to the tip portion so as to cover the piston rod 83 in an airtight state. The rod portion 95 is substantially a piston rod and is formed in a cylindrical shape. A stopper portion 96 having a diameter larger than the diameter of the rod through hole 84a is provided on the outer periphery of the rod portion 95 in the cylinder 81, and the piston 82 and the piston rod 83 can move from the cylinder 81 toward the opening end. Be regulated. A sealing material (not shown) such as an O-ring is provided between the lid 84 and the rod portion 95.

ピストンロッド８３及びロッド部９５のストッパ部９６は、原稿圧着板３の所定の閉成角度、例えば、１０°（１０°前後を含む。）で第２スライダー７２の底部の内面７２ｄにピストンロッド８３の先端部が当接する寸法や位置等に形成されており、原稿圧着板３が閉成方向に回動したとき、原稿圧着板３の閉成角度が１０°になると、ピストンロッド８３の先端部が第２スライダー７２の底部の内面に当接して、第１流体室８６のオイル８５がシリンダ８１とピストン８２との間を通って第２流体室８７に流入して原稿圧着板３の回動速度が低減されるように構成されている。なお、シリンダ８１の底部を第１スライダー７１の底部の内面に着脱可能に固定したが、シリンダ８１の底部を第２スライダー７２の底部の内面７２ｄに着脱可能に固定するようにしてもよい。   The piston rod 83 and the stopper portion 96 of the rod portion 95 are arranged on the inner surface 72d of the bottom portion of the second slider 72 at a predetermined closing angle of the original cover 3, for example, 10 ° (including around 10 °). When the document crimping plate 3 is rotated in the closing direction and the closing angle of the document crimping plate 3 is 10 °, the tip of the piston rod 83 is formed. Comes into contact with the inner surface of the bottom of the second slider 72, and the oil 85 in the first fluid chamber 86 flows between the cylinder 81 and the piston 82 and flows into the second fluid chamber 87 to rotate the original cover 3. The speed is reduced. Although the bottom portion of the cylinder 81 is detachably fixed to the inner surface of the bottom portion of the first slider 71, the bottom portion of the cylinder 81 may be detachably fixed to the inner surface 72d of the bottom portion of the second slider 72.

さらに、シリンダ８１及びピストン８２は、原稿圧着板３の回動速度を低減する緩衝効果が動作途中から小さくなるように形成されている。シリンダ８１及びピストン８２は、その緩衝効果が動作途中から小さくできれば、どのように形成してもよく、例えば、シリンダ８１の内壁にシリンダ凹部９１を設けると共に、ピストン８２の外壁である外周にピストン凹部９２を設けてもよい。   Further, the cylinder 81 and the piston 82 are formed so that the buffering effect for reducing the rotation speed of the original cover 3 is reduced from the middle of the operation. The cylinder 81 and the piston 82 may be formed in any way as long as the buffering effect can be reduced from the middle of the operation. For example, a cylinder recess 91 is provided on the inner wall of the cylinder 81 and the piston recess is formed on the outer periphery which is the outer wall of the piston 82. 92 may be provided.

シリンダ凹部９１は、例えば、シリンダ８１の内壁が拡径されて形成されている。このシリンダ凹部９１が設けられている箇所は、コンプレッションスプリング８９によってピストン８２が付勢されてシリンダ８１から露出しているピストンロッド８３の露出長が最大のとき（流体ダンパ装置８が未動作のとき）、ピストン８２の軸方向の中央部より若干シリンダ８１の開口部側から開口部の近傍までである。すなわち、シリンダ８１の内壁は、小径部と大径部との２つの径が違う箇所が形成され、大径部がシリンダ凹部９１として形成されている。   The cylinder recess 91 is formed by, for example, expanding the inner wall of the cylinder 81. The cylinder recess 91 is provided when the piston 82 is urged by the compression spring 89 and the exposed length of the piston rod 83 exposed from the cylinder 81 is maximum (when the fluid damper device 8 is not operating). ), Slightly from the opening side of the cylinder 81 to the vicinity of the opening from the axial center of the piston 82. That is, the inner wall of the cylinder 81 is formed with a portion having two different diameters, a small diameter portion and a large diameter portion, and the large diameter portion is formed as a cylinder recess 91.

ピストン凹部９２は、ピストン８２の外周にその軸方向に延びると共にその周方向に等間隔で複数設けられていてもよい。ピストン凹部９２の形状は、特に限定されず、図示するように半円状（周面が円弧状のものも含む。）、三角状、矩形状、多角形状等の形状が挙げられる。ピストン凹部９２は、例えば、ピストン８２の軸方向の中央部より若干シリンダ８１の開口部側からその開口部側の端部まで延びて形成されている。すなわち、ピストン凹部９２は、流体ダンパ装置８が未動作のとき、シリンダ凹部９１と対向するようにピストン８２の軸方向に延びて形成されている。また、ピストン凹部９２は、ピストン８２の外周に等間隔例えば４５°間隔に８つ設けられている。このように、ピストン凹部９２及びシリンダ凹部９１を設けることによって、第１流体室８６のオイル８５がシリンダ８１とピストン８２との間を通って第２流体室８７に流入するとき、そのオイル８５がピストン凹部９２及びシリンダ凹部９１に流れこむので、原稿圧着板３の回動速度を低減する緩衝効果が動作途中から小さくなるようになっている。このため、シリンダ凹部９１の形状や深さ等、及びピストン凹部９２の形状や個数等を代えることにより、その緩衝効果が動作途中から小さくなる効果を任意に変えることができる。   A plurality of piston recesses 92 may be provided on the outer periphery of the piston 82 in the axial direction and provided at equal intervals in the circumferential direction. The shape of the piston recess 92 is not particularly limited, and examples thereof include a semicircular shape (including those having a circular arc surface), a triangular shape, a rectangular shape, and a polygonal shape. The piston recess 92 is formed, for example, slightly extending from the center of the piston 82 in the axial direction from the opening of the cylinder 81 to the end of the opening. That is, the piston recess 92 is formed to extend in the axial direction of the piston 82 so as to face the cylinder recess 91 when the fluid damper device 8 is not operating. Further, eight piston recesses 92 are provided on the outer periphery of the piston 82 at equal intervals, for example, 45 ° intervals. Thus, by providing the piston recess 92 and the cylinder recess 91, when the oil 85 in the first fluid chamber 86 flows between the cylinder 81 and the piston 82 and flows into the second fluid chamber 87, the oil 85 is Since it flows into the piston recess 92 and the cylinder recess 91, the buffering effect of reducing the rotation speed of the original cover 3 is reduced from the middle of the operation. Therefore, by changing the shape and depth of the cylinder recess 91 and the shape and number of the piston recesses 92, the effect of reducing the buffering effect during the operation can be arbitrarily changed.

次に、本発明に係る原稿圧着板開閉装置の作用を説明する。   Next, the operation of the document crimping plate opening / closing device according to the present invention will be described.

原稿圧着板３は、複写機等の本体２が使用されていない状態では、図１に示すように、本体２のコンタクトガラス面に密着されている。コンタクトガラス２０の面上に原稿を載置するには、まず、原稿圧着板３のリフト部材６が取り付けられている箇所とは反対側の端部又はその近傍等に設けられている把持部を持って原稿圧着板３を上方に持ち上げる。すなわち、原稿圧着板３を開成方向に回動させる。すると、原稿圧着板３は第１ヒンジピン１１を軸にのみ回動してコンタクトガラス面が外部に露出する（図２参照。）。その露出したコンタクトガラス２０の面上に原稿を載置する。   The original cover 3 is in close contact with the contact glass surface of the main body 2 when the main body 2 such as a copying machine is not used, as shown in FIG. In order to place a document on the surface of the contact glass 20, first, a gripping portion provided at an end of the document crimping plate 3 on the side opposite to the portion where the lift member 6 is attached or the vicinity thereof is provided. Hold the document crimping plate 3 upward. That is, the original cover 3 is rotated in the opening direction. Then, the original cover 3 rotates only about the first hinge pin 11 and the contact glass surface is exposed to the outside (see FIG. 2). A document is placed on the exposed surface of the contact glass 20.

載置後、持ち上げた原稿圧着板３を降ろす。すなわち、原稿圧着板３を閉成方向に回動させる。すると、原稿圧着板３はコンタクトガラス２０と接触する方向に第１ヒンジピン１１を軸に回動する（下方に移動する）。このとき、圧縮コイルスプリング７３の付勢力によってリフト部材６の上板６１が支持部材５のストッパ部５５に当接した状態のまま、つまり、原稿圧着板３（リフト部材６）が第２ヒンジピン１２を軸に回動することがないまま、原稿圧着板３が第１ヒンジピン１１のみを軸にして下方に回動する。   After the placement, the raised original cover 3 is lowered. That is, the original cover 3 is rotated in the closing direction. Then, the original cover 3 rotates about the first hinge pin 11 in the direction in which it contacts the contact glass 20 (moves downward). At this time, the upper plate 61 of the lift member 6 is in contact with the stopper portion 55 of the support member 5 by the urging force of the compression coil spring 73, that is, the original pressure plate 3 (lift member 6) is in the second hinge pin 12. The original cover 3 is rotated downward about only the first hinge pin 11 without rotating about the axis.

このように原稿圧着板３を閉成方向に回動させる場合、最初は圧縮コイルスプリング７３の付勢力に抗するために多少の力が必要になるが、例えば、原稿圧着板３の開成角度が２０°（２０°前後を含む。）以下になると、原稿圧着板３の重量が圧縮コイルスプリング７３の付勢力より強くなるので、原稿圧着板３は落下するように回動する。原稿圧着板３の開成角度が例えば１０°（１０°前後を含む。）になると、流体ダンパ装置８のピストンロッド８３の先端が第２スライダー７２の底部の内面に当接して、ピストンロッド８３を介してピストン８２が第１流体室８６をコンプレッションスプリング８９の付勢力に抗して押圧する。これにより、第１流体室８６のオイル８５がシリンダ８１とピストン８２との間を通って第２流体室８７に流入して、ピストンロッド８３がシリンダ８１内に移動してピストンロッド８３の露出長が短くなり、原稿圧着板３の回動速度が低減される。その結果、原稿圧着板３の回動速度が流体ダンパ装置８によって制御されるので、原稿圧着板３が勢いよくコンタクトガラス２０に衝突することがない。   Thus, when the original cover 3 is rotated in the closing direction, a little force is initially required to resist the biasing force of the compression coil spring 73. For example, the opening angle of the original cover 3 is If the angle is less than 20 ° (including around 20 °), the weight of the original pressure plate 3 becomes stronger than the urging force of the compression coil spring 73, so that the original pressure plate 3 rotates so as to fall. When the opening angle of the original cover 3 is, for example, 10 ° (including around 10 °), the tip of the piston rod 83 of the fluid damper device 8 comes into contact with the inner surface of the bottom of the second slider 72, and the piston rod 83 is moved. The piston 82 presses the first fluid chamber 86 against the biasing force of the compression spring 89. As a result, the oil 85 in the first fluid chamber 86 passes between the cylinder 81 and the piston 82 and flows into the second fluid chamber 87, and the piston rod 83 moves into the cylinder 81 and the exposed length of the piston rod 83. Becomes shorter, and the rotation speed of the original cover 3 is reduced. As a result, the rotation speed of the document crimping plate 3 is controlled by the fluid damper device 8, so that the document crimping plate 3 does not collide with the contact glass 20 vigorously.

また、第１流体室８６のオイル８５がシリンダ８１とピストン８２との間を通って第２流体室８７に流入するとき、このオイル８５は、ピストン凹部９２及びシリンダ凹部９１に流れこむために、ピストン８２のシリンダ８１内への移動、すなわち、ピストンロッド８３の縮み速度が速くなるので、原稿圧着板３の回動速度を低減する緩衝効果が動作途中から小さくなる。このため、原稿圧着板３がコンタクトガラス２０に近接すると、原稿圧着板３は、コンタクトガラス２０の面上に原稿がない状態ではコンタクトガラス面から浮くことなくコンタクトガラス面に密着する。その結果、紙のように厚さが薄い原稿がコンタクトガラス２０の面上に載置されている場合には、その紙に原稿圧着板３が面接触し、原稿の全体が原稿圧着板３によってコンタクトガラス面に押し付けられるので、原稿が安定してコンタクトガラス面に密着することになる。このように、原稿圧着板３がコンタクトガラス面から浮くことなくコンタクトガラス面に密着することにより、原稿圧着板開閉装置に自動原稿送り装置が備えられている場合には、自動原稿送り装置の紙送りローラや原稿押え板等がコンタクトガラス面から浮いて紙の自動送りを行えないこともない。   Further, when the oil 85 in the first fluid chamber 86 flows between the cylinder 81 and the piston 82 and flows into the second fluid chamber 87, the oil 85 flows into the piston recess 92 and the cylinder recess 91. Since the movement of 82 into the cylinder 81, that is, the contraction speed of the piston rod 83 is increased, the buffer effect for reducing the rotation speed of the original cover 3 is reduced from the middle of the operation. Therefore, when the original cover 3 is close to the contact glass 20, the original cover 3 is in close contact with the contact glass surface without floating from the contact glass surface when no original is on the surface of the contact glass 20. As a result, when a thin original such as paper is placed on the surface of the contact glass 20, the original pressing plate 3 comes into surface contact with the paper, and the entire original is pressed by the original pressing plate 3. Since it is pressed against the contact glass surface, the document is stably adhered to the contact glass surface. As described above, when the document pressing plate 3 is brought into close contact with the contact glass surface without floating from the contact glass surface, when the document pressing plate opening / closing device is provided with the automatic document feeding device, the paper of the automatic document feeding device is provided. There is no possibility that the feeding roller, the document pressing plate, etc. are lifted from the contact glass surface and cannot automatically feed the paper.

また、原稿が図３に示すように本のように厚さが厚い場合、原稿圧着板３を回動させる（下方に移動させる）と、原稿３０の支持部材５側の端部３０ａ又はその近傍に原稿圧着板３の支持部材５の近傍の一部が接触し、原稿３０の支持部材５側の端部３０ａとは反対側の端部と原稿圧着板３との間に空間が形成される。すなわち、把持部側の端部の原稿圧着板３は浮いた状態となる。その浮いている原稿圧着板３の例えば把持部側の端部近傍をコンタクトガラス２０側に押圧すると、作動ピン１４が第１スライダー７１を第２スライダー７２側に押圧して圧縮コイルスプリング７３の付勢力に抗して第１スライダー７１が第２スライダー７２側に移動すると共に、原稿圧着板３（リフト部材６）が第２ヒンジピン１２を軸に回動する。すなわち、原稿３０の上部を覆うように原稿圧着板３が移動する。例えば、その原稿３０の上部が平坦面である場合には、この上部に原稿圧着板３が面接触する。よって、厚さが厚い原稿３０が安定してコンタクトガラス面に密着することになる。   Further, when the document is thick like a book as shown in FIG. 3, when the document crimping plate 3 is rotated (moved downward), the end 30a of the document 30 on the support member 5 side or the vicinity thereof A part of the document crimping plate 3 near the support member 5 is in contact with the document crimping plate 3, and a space is formed between the document crimping plate 3 and the end of the document 30 opposite to the end 30 a on the support member 5 side. . That is, the document pressing plate 3 at the end on the gripping portion side is in a floating state. When, for example, the vicinity of the gripping part side end of the floating original cover 3 is pressed against the contact glass 20 side, the operating pin 14 presses the first slider 71 toward the second slider 72 side to attach the compression coil spring 73. The first slider 71 moves toward the second slider 72 against the force, and the original cover 3 (lift member 6) rotates about the second hinge pin 12. That is, the original cover 3 moves so as to cover the upper part of the original 30. For example, when the upper part of the original 30 is a flat surface, the original cover 3 comes into surface contact with the upper part. Therefore, the thick original 30 is stably adhered to the contact glass surface.

したがって、本発明に係る原稿圧着板開閉装置１は、原稿圧着板３が勢いよくコンタクトガラス２０に衝突することがないと共に、原稿圧着板３がコンタクトガラス面から浮くことなくコンタクトガラス面に密着でき、しかも厚さに関係なく原稿を本体に安定して密着させることができる。   Therefore, the document crimping plate opening / closing device 1 according to the present invention can prevent the document crimping plate 3 from strikingly contacting the contact glass 20 and can adhere to the contact glass surface without the document crimping plate 3 floating from the contact glass surface. In addition, the original can be stably adhered to the main body regardless of the thickness.

なお、以上の本発明の形態では、第２スライダー７２を用いた場合について説明したが、この第２スライダー７２を固定ピン１３へ揺動可能に取り付けてなる公知構成のスプリング受け部材に代えても、この発明の目的を達成することができる。   In the above-described embodiment of the present invention, the case where the second slider 72 is used has been described. However, the second slider 72 may be replaced with a spring receiving member having a known configuration in which the second slider 72 is swingably attached to the fixed pin 13. The object of the present invention can be achieved.

以上説明したように本発明に係る原稿圧着板開閉装置は、原稿圧着板の回動速度を制御すると共に、原稿圧着板を本体に浮くことなく密着させることができるので、特に複写機、印刷機、ファクシミリ、スキャナー等の原稿圧着板開閉装置として好適に用いられるものである。   As described above, the document crimping plate opening / closing apparatus according to the present invention controls the rotational speed of the document crimping plate and can bring the document crimping plate into close contact with the main body, so that it is particularly suitable for copying machines and printing machines. It is suitably used as a document pressure plate opening / closing device for facsimiles, scanners and the like.

本発明に係る原稿圧着板開閉装置の一例を示す側断面図である。It is a sectional side view showing an example of a manuscript crimping plate opening and closing device concerning the present invention. 本発明に係る原稿圧着板開閉装置の一例を示す側断面図である。It is a sectional side view showing an example of a manuscript crimping plate opening and closing device concerning the present invention. 本発明に係る原稿圧着板開閉装置の一例を示す側断面図である。It is a sectional side view showing an example of a manuscript crimping plate opening and closing device concerning the present invention. 本発明に係る流体ダンパ装置の一例を示す図で、（ａ）は斜視図、（ｂ）は平面図、（ｃ）は（ｂ）中のＡ−Ａ線矢視断面図である。It is a figure which shows an example of the fluid damper apparatus which concerns on this invention, (a) is a perspective view, (b) is a top view, (c) is AA arrow sectional drawing in (b). 本発明に係る流体ダンパ装置の一例を示す断面図である。It is sectional drawing which shows an example of the fluid damper apparatus which concerns on this invention. 本発明に係るピストンの一例を示す図で、（ａ）は正面、（ｂ）は（ａ）中のＢ−Ｂ線矢視断面図である。It is a figure which shows an example of the piston which concerns on this invention, (a) is a front, (b) is a BB sectional view taken on the line in (a).

符号の説明Explanation of symbols

１ 原稿圧着板開閉装置
２ 本体
３ 原稿圧着板
４ 取付部材
５ 支持部材
６ リフト部材
７ 弾性手段
８ 流体ダンパ装置
７１ 第１スライダー
７２ 第２スライダー
７３ 圧縮コイルスプリング
８１ シリンダ
８２ ピストン
８３ ピストンロッド
８６ 第１流体室
８７ 第２流体室
８９ コンプレッションスプリング
９１ シリンダ凹部
９２ ピストン凹部
９５ ロッド部
DESCRIPTION OF SYMBOLS 1 Document pressure plate opening / closing device 2 Main body 3 Document pressure plate 4 Attachment member 5 Support member 6 Lift member 7 Elastic means 8 Fluid damper device 71 1st slider 72 2nd slider 73 Compression coil spring 81 Cylinder 82 Piston 83 Piston rod 86 1st Fluid chamber 87 Second fluid chamber 89 Compression spring 91 Cylinder recess 92 Piston recess 95 Rod

Claims (3)

複写機、印刷機、ファクシミリ、スキャナー等の本体に取り付けられる取付部材と、その取付部材に回動自在に連結され、原稿圧着板に取り付けられて原稿圧着板を開閉可能に支持する支持部材と、前記取付部材と前記支持部材との間に設けられ、前記原稿圧着板を開成方向に回動付勢すると共に、前記原稿圧着板が所定の閉成角度以下のとき、前記原稿圧着板を付勢する付勢力が前記原稿圧着板の重量より弱い弾性手段と、前記取付部材と前記支持部材との間に設けられ、前記原稿圧着板が閉成方向に回動したとき、前記原稿圧着板の前記所定の閉成角度以下においてのみ動作して前記原稿圧着板の回動速度を低減する流体ダンパ装置とを備えた原稿圧着板開閉装置であって、
前記流体ダンパ装置は、内部に流体が充填された蓋体付きのシリンダと、このシリンダ内に設けられ前記シリンダ内部を２つの第１流体室と第２流体室に仕切るところの軸方向へ移動付勢されたピストンと、このピストンへ取り付けられその一端側を前記シリンダの蓋体外へシール部材を介して突出させたピストンロッドとを有し、前記ピストンロッドの動作時に前記シリンダと前記ピストンの間で前記第１及び第２流体室の一方のものから他方のものへ流体を移動させて前記原稿圧着板の落下速度を緩衝させるように構成すると共に、前記シリンダ内壁にその内径を拡張させてシリンダ凹部を設け、前記ピストンの外周に所定間隔を空けて複数のピストン凹部をその一端部から中ほどまで設け、もって前記原稿圧着板の落下緩衝効果が動作途中から小さくなるように成したことを特徴とする、原稿圧着板開閉装置。 An attachment member attached to the main body of a copying machine, a printing machine, a facsimile machine, a scanner, and the like, and a support member rotatably connected to the attachment member and attached to the original pressure plate so as to open and close the original pressure plate. Provided between the mounting member and the support member, and urges the original pressure plate to rotate in the opening direction, and urges the original pressure plate when the original pressure plate is below a predetermined closing angle. An urging force that is weaker than the weight of the original cover, and provided between the mounting member and the support member, and when the original cover is rotated in the closing direction, A document crimping plate opening / closing device provided with a fluid damper device that operates only at a predetermined closing angle or less and reduces a rotation speed of the document crimping plate,
The fluid damper device includes a cylinder with a lid that is filled with a fluid inside, and an axial movement that is provided in the cylinder and divides the inside of the cylinder into two first fluid chambers and a second fluid chamber. And a piston rod attached to the piston and projecting one end of the piston to the outside of the lid of the cylinder via a seal member, and between the cylinder and the piston during the operation of the piston rod. The structure is such that the fluid is moved from one of the first and second fluid chambers to the other to buffer the falling speed of the original pressure plate, and the inner diameter of the cylinder inner wall is expanded to form a cylinder recess. A plurality of piston recesses are provided from one end to the middle with a predetermined interval on the outer periphery of the piston, so that the drop-pressing effect of the original cover is operated. Characterized in that form so as to be smaller from within, the original cover closer. 前記弾性手段を、前記支持部材内に嵌合された一対のスライダーと、これらのスライダー内に設けられた圧縮コイルスプリングで構成し、前記流体ダンパ装置を前記圧縮コイルスプリングの中に設けたことを特徴とする、請求項１に記載の原稿圧着板開閉装置。The elastic means is composed of a pair of sliders fitted in the support member and compression coil springs provided in the sliders, and the fluid damper device is provided in the compression coil springs. The document crimping plate opening and closing device according to claim 1, wherein 前記支持部材にはさらに、その自由端側に前記原稿圧着板を取り付けるリフト部材が一方向へ回転付勢されて取り付けられていることを特徴とする、請求項１に記載の原稿圧着板開閉装置。2. The document crimping plate opening / closing apparatus according to claim 1, further comprising a lift member attached to the support member, the lift member for mounting the document crimping plate on one side of the support member, being urged to rotate in one direction. .
JP2004322863A 2004-11-05 2004-11-05 Document crimping plate opening and closing device Active JP4780947B2 (en)

Priority Applications (1)

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Cited By (1)

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CN110645260A (en) * 2018-06-26 2020-01-03 加藤电机（香港）有限公司 Hinge and various machines using the same

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JP4911496B2 (en) * 2006-06-14 2012-04-04 下西技研工業株式会社 Opening and closing device for original cover
JP5148228B2 (en) * 2007-03-15 2013-02-20 加藤電機株式会社 Document crimping plate opening and closing device and office equipment equipped with document crimping plate
CN101458470B (en) * 2007-12-13 2012-08-22 下西技研工业株式会社 Manuscript pressure strip switching device
CN101458471B (en) * 2007-12-13 2012-10-10 下西技研工业株式会社 Manuscript pressure strip switching device
AT516587B1 (en) 2014-12-09 2023-06-15 Blum Gmbh Julius furniture hinge
CA3206281A1 (en) * 2014-12-30 2016-06-30 Thule Sweden Ab Ski carrier clamp
JP7133186B2 (en) * 2017-12-13 2022-09-08 下西技研工業株式会社 hinge
JP7347786B2 (en) * 2019-05-29 2023-09-20 下西技研工業株式会社 hinge

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JP2589714Y2 (en) * 1992-12-22 1999-02-03 加藤電機株式会社 Opening / closing device for original cover
JP2832137B2 (en) * 1993-10-25 1998-12-02 キヤノン株式会社 Document opening and closing mechanism
JP3971276B2 (en) * 2002-09-05 2007-09-05 加藤電機株式会社 Hinge device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110645260A (en) * 2018-06-26 2020-01-03 加藤电机（香港）有限公司 Hinge and various machines using the same

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