JP2010282158A5

JP2010282158A5 -

Info

Publication number: JP2010282158A5
Application number: JP2009137740A
Authority: JP
Filing date: 2009-06-08
Publication date: 2012-11-08
Anticipated expiration: 2029-06-08

Description

図１と図２において、指示記号１で示したものは、例えば画像形成装置とも称せられる複写機である。この複写機１は、装置本体２と原稿圧着板３から成り、この装置本体２上のコンタクトガラス４上へ原稿（図示せず）を圧着させるために用いられる本発明に係る原稿圧着板開閉装置５は、とくに図１と図２に示したように、装置本体２の後部上端へ原稿圧着板３の後部を開閉可能に連結させるものである（図１のＡ）。尚、原稿圧着板３は、図示はしてないが公知構成の原稿自動送り装置付きのものと、そうでないものとの二種類からなり、本発明に係る原稿圧着板開閉装置は、どちらの原稿圧着板にも適用できるものであるが、好ましくは原稿自動送り装置付きでない軽くてそれ自身が中折れするなどして厚物原稿にも対処できるように構成した原稿圧着板開閉装置である。 In FIG. 1 and FIG. 2, what is indicated by an instruction symbol 1 is a copier which is also called an image forming apparatus, for example. The copying machine 1 includes an apparatus main body 2 and a document crimping plate 3. The document crimping plate opening / closing apparatus according to the present invention is used to crimp a document (not shown) onto a contact glass 4 on the apparatus main body 2. 1 and 2, particularly, as shown in FIGS. 1 and 2, the rear part of the original cover 3 is connected to the upper end of the rear part of the apparatus main body 2 so as to be openable and closable (A in FIG. 1) . The document crimping plate 3 is of two types, that is, not shown, but having a known automatic document feeder and one that is not so. Although it can be applied to a pressure plate, it is preferably a document pressure plate opening / closing device that is not lightly equipped with an automatic document feeder and is configured so as to be able to cope with a thick document by folding itself.

この原稿圧着板３の閉成状態から、コンタクトガラス４上へ原稿を載置するために、当該原稿圧着板３を開いて行くと、ヒンジピン９を支点に共に回転する支持部材１０によって、揺動部１１の回転制御手段１７を構成するローラ１２はスプリングガイド１５を介して弾性手段１４を若干押し込んで、その上面をスライドして移動し、図６に示したように、原稿圧着板３がコンタクトガラス４、即ち、装置本体２に対して略８°の開成角度になった時に、弾性手段１４の中心作用線とヒンジピン９及びローラ１２の中心を結ぶ直線が平行となるので、支持部材１０はどちらの方向にも回動付勢されない状態になる。さらに原稿圧着板３を開くと、弾性手段１４による付勢方向が反転して今度は原稿圧着板３を開成方向へ付勢して、図７に示したように、支持部１０ｂのストッパー部１０ｇが取付部材７の閉塞部８ａへ当接するまで開かれる。尚、この８°の開成角度に限定はない。その後、開いた原稿圧着板３は開成方向へ付勢された状態となるので、当該原稿圧着板３は閉成方向へ自然落下することなく開成状態を保つことになる。この開成角度は実施例のもので略５０°であるが、この開成角度についても限定はない。 When the original cover 3 is opened in order to place the original on the contact glass 4 from the closed state of the original cover 3, it is swung by the support member 10 that rotates together with the hinge pin 9 as a fulcrum. The roller 12 constituting the rotation control means 17 of the section 11 pushes the elastic means 14 slightly through the spring guide 15 and slides on the upper surface thereof, and moves as shown in FIG. Since the central action line of the elastic means 14 and the straight line connecting the centers of the hinge pin 9 and the roller 12 become parallel when the opening angle of the glass 4, that is, the apparatus main body 2 is approximately 8 °, the support member 10 is It is in a state where it is not biased in either direction. When the original cover 3 is further opened, the urging direction by the elastic means 14 is reversed and this time, the original cover 3 is urged in the opening direction, and as shown in FIG. 7, the stopper portion 10g of the support portion 10b. Is opened until it comes into contact with the closing portion 8a of the mounting member 7. The opening angle of 8 ° is not limited. Thereafter, the opened original cover 3 is urged in the opening direction, so that the original cover 3 is kept open without being naturally dropped in the closing direction. The opening angle is approximately 50 ° in the example, but there is no limitation on the opening angle.

次に、開いた原稿圧着板３を閉じる際には、略８°までの閉成角度までに弾性手段１４をローラ１２を介して押し込む際の抵抗に遭遇するが、略８°でヒンジピン９とローラ１２の中心を結ぶ直線と、弾性手段１４の作用中心線が平行となった以降は、弾性手段１４がローラ１２を上方の原稿圧着板３を閉じる方向へ押す弾力が作用して、原稿圧着板３は自重と弾性手段１４の付勢力により自動的に閉じられる。 Next, when the opened original cover 3 is closed, resistance is encountered when the elastic means 14 is pushed through the roller 12 up to a closing angle of approximately 8 °. After the straight line connecting the centers of the rollers 12 and the action center line of the elastic means 14 become parallel , the elastic means 14 exerts an elastic force that pushes the rollers 12 in the direction to close the upper document pressing plate 3, thereby pressing the documents. The plate 3 is automatically closed by its own weight and the urging force of the elastic means 14.