JPH01154136A - Press-contact plate opening and closing device - Google Patents
Press-contact plate opening and closing deviceInfo
- Publication number
- JPH01154136A JPH01154136A JP31325087A JP31325087A JPH01154136A JP H01154136 A JPH01154136 A JP H01154136A JP 31325087 A JP31325087 A JP 31325087A JP 31325087 A JP31325087 A JP 31325087A JP H01154136 A JPH01154136 A JP H01154136A
- Authority
- JP
- Japan
- Prior art keywords
- compression spring
- plate
- spring
- closing device
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims abstract description 42
- 238000007906 compression Methods 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 238000002788 crimping Methods 0.000 claims 2
- 238000007688 edging Methods 0.000 abstract 4
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Holders For Sensitive Materials And Originals (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、原稿静止型ファクシミリあるいは複写機等の
画像形成装置のプラテンに載置された原稿を押える圧着
板の圧着板開閉装置に係り、詳しくは占有スペースを極
力小さくした圧着板開閉装置の構造に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a pressure plate opening/closing device for a pressure plate that holds down a document placed on a platen of an image forming apparatus such as a stationary document facsimile machine or a copying machine. More specifically, the present invention relates to the structure of a crimp plate opening/closing device that occupies as little space as possible.
（ロ） 従来の技術
従来、圧着板開閉装置１ば、第３図及び第４図に示すよ
うに画像形成装置の支持受部にて支持された支持脚２に
回動材３が軸５により回動自在に支持されており、該回
動材３には軸６が突設されている。そして、該軸６には
圧縮バネ７が遊嵌されており、該バネ７の先端側には該
軸６にストッパ９が摺動自在に外嵌されている。また、
前記支持脚２により取付部材１０が軸１１を中心として
回動自在に支持されており、該取付部材１０には圧着板
１２が固定されている。更に、該取付部材１０の先端は
前記ストッパ９と係合しており、これにより前記圧縮バ
ネ７は、先端側を該ストッパ９により、かつ基端側を前
記回動材３により規制され、前記圧着板１２の開閉によ
り、前記取付部材１０、前記＠部材３、前記軸６、前記
圧縮バネ７及び前記ストッパ９が一体に回動するように
構成されている。そして、圧着バネ７の選定（例えば本
数、バネ定数、自由長等）を行う場合、まず、圧着板１
２の重量、重心を測定し、ついで軸５及び軸１１の位置
、ストッパ９と取付部材１０との係合位置を設定する。(B) Prior Art Conventionally, as shown in FIGS. 3 and 4, in a crimp plate opening/closing device 1, a rotating member 3 is attached to a support leg 2 supported by a support receiving portion of an image forming apparatus by means of a shaft 5. It is rotatably supported, and a shaft 6 is protruded from the rotatable member 3 . A compression spring 7 is loosely fitted onto the shaft 6, and a stopper 9 is slidably fitted onto the shaft 6 at the tip end of the spring 7. Also,
A mounting member 10 is rotatably supported by the support leg 2 about a shaft 11, and a pressure bonding plate 12 is fixed to the mounting member 10. Further, the distal end of the mounting member 10 is engaged with the stopper 9, so that the compression spring 7 is regulated by the stopper 9 on the distal end side and by the rotating member 3 on the proximal end side. The mounting member 10, the @ member 3, the shaft 6, the compression spring 7, and the stopper 9 are configured to rotate together by opening and closing the crimp plate 12. When selecting the crimp spring 7 (for example, the number, spring constant, free length, etc.), first, the crimp plate 1
2, and then set the positions of the shafts 5 and 11 and the engagement position of the stopper 9 and the mounting member 10.
それから、操作性の面から、圧着板１２を閉じた状態か
ら開くのに要する力Ｆ１、圧着板１２を開いた状態から
閉じるのに要する力Ｆ２及び圧着板１２の静止開放角度
αを設定し、バネ力による圧着板１２を軸１１回りに開
かせようとするモーメントと、圧着板１２の重量によっ
て圧着板１２を閉じようとするモーメントとのバランス
により、圧着板１２が閉じた際に圧縮バネ７の長さがＬ
ｌにおけろ該バネ７のバネ力Ｒ１と、圧着板１２が開放
された際に圧縮バネ７の長さがＬ２における該バネ７の
バネ力Ｒ２とを求め、そして許容応力内にバネ力Ｒ１を
含み、かつ繰り返し回数が十分な圧縮バネを選定する。Then, from the viewpoint of operability, the force F1 required to open the crimp plate 12 from the closed state, the force F2 required to close the crimp plate 12 from the open state, and the static opening angle α of the crimp plate 12 are set, When the compression plate 12 is closed, the compression spring 7 The length of is L
Find the spring force R1 of the spring 7 at L and the spring force R2 of the spring 7 when the length of the compression spring 7 is L2 when the crimp plate 12 is released, and then calculate the spring force R1 within the allowable stress. Select a compression spring that includes a sufficient number of repetitions.
（ハ）発明が解決しようとする問題点
ところで、上述した圧着板開閉装置１では、最適なバネ
を設定することができない場合が多々あり、その場合、
軸１１の中心からバネ力Ｒ１の作用線上に下した垂線の
長さｌを長（するように該軸１１を配置してバネ力Ｒ１
を小さ（したり、長さｌ及びバネ力Ｒ１はそのままで長
さＬｌを長くしたりして各パラメータを変更して圧縮バ
ネの選定範囲を広げている。このため、圧着板開閉装置
１の占有容積が大きくなる傾向にあり、装置全体の小型
化に逆行するものとなっている。(c) Problems to be solved by the invention By the way, in the above-described crimp plate opening/closing device 1, it is often not possible to set the optimum spring, and in that case,
The shaft 11 is arranged so that the length l of a perpendicular drawn from the center of the shaft 11 to the line of action of the spring force R1 is
The selection range of compression springs is expanded by changing each parameter by decreasing (or increasing the length Ll while leaving the length l and spring force R1 unchanged). There is a tendency for the occupied volume to become larger, which goes against the trend toward miniaturization of the entire device.
（ハ）問題点を解決するための手段
本発明は、上述問題点を解消することを目的とするもの
であり、圧縮バネの回動部材側の端部を、該回動部材の
回動中心より、前記圧縮バネの規制部材側の端部に対し
て遠い位置に設置した、ことを特徴とするものである。(C) Means for Solving the Problems The present invention aims to solve the above-mentioned problems. Accordingly, the present invention is characterized in that the compression spring is installed at a position far from the end of the compression spring on the regulating member side.
（ホ） 作用
上述構成に基づき、圧縮バネが占有するスペースを小さ
くして圧着板自体を小型化する。そして、オペレータが
、閉状態の圧着板の自重による回転モーメントから圧縮
バネのバネ力による回転モーメントを差し引いた以上の
回転モーメントにより圧着板を開放すると、該圧着板は
圧縮バネによし開放付勢されて開状態を保持する。また
、開状態にある圧着板を閉じろ場合、オペレータは、圧
縮バネのバネ力による回転モーメントから圧着板の自重
による回転モーメントを差し引いた以上の回転モーメン
トにより圧着板を閉じると、圧着板の自重による回転モ
ーメントが圧縮バネのバネ力による回転モーメントより
大きくなり、圧着板は閉状態を保持する。(e) Effect: Based on the above-described structure, the space occupied by the compression spring is reduced, and the pressure bonding plate itself is miniaturized. When the operator opens the crimp plate with a rotation moment greater than the rotation moment due to the weight of the crimp plate in the closed state minus the rotation moment due to the spring force of the compression spring, the crimp plate is urged open by the compression spring. to keep it open. In addition, when closing a crimp plate that is in an open state, if the operator closes the crimp plate with a rotational moment greater than the rotational moment due to the spring force of the compression spring minus the rotational moment due to the crimp plate's own weight, The rotational moment becomes larger than the rotational moment due to the spring force of the compression spring, and the crimp plate maintains the closed state.
（へ）実施例
以下、図面に沿って、本発明の実施例について説明する
。(F) Examples Examples of the present invention will be described below with reference to the drawings.
なお、前述した部材と同一の部材には同一符号を付して
説明を省略する。In addition, the same reference numerals are given to the same members as those described above, and the description thereof will be omitted.
回転材３′は、第２図に示すように、両側板３′ａ、３
’ｂ及び底板３’ ｃからなるコの字状をした金属板に
より構成されており、該回転材３′の両側板３’ａ、３
’ｂにはそれぞれバーリング加工により軸部１３が成形
されている。そして、これら軸部１３，１３はそれぞれ
軸受１５を介して支持脚２により回動自在に支持されて
おり、これにより回ｒ！ＪＪ材３′はこれら軸部１３，
１３の回動中心１３ａを中心として揺動するように構成
されている。As shown in FIG. 2, the rotating member 3' has side plates 3'a, 3
It is composed of a U-shaped metal plate consisting of a bottom plate 3'b and a bottom plate 3'c.
A shaft portion 13 is formed in each of 'b by burring. These shaft portions 13, 13 are rotatably supported by the support legs 2 via bearings 15, so that the shaft portions 13, 13 can rotate freely! JJ material 3' has these shaft parts 13,
It is configured to swing around a rotation center 13a of No. 13.
また、取付部材１０は、第１図に示すように、基端側が
ストッパ部１０ａを構成しており、該ストッパ部１０ａ
は支持脚２のエツジ部２ａと当接して圧着板１２の最大
開放角度を規制するように構成されている。Further, as shown in FIG. 1, the mounting member 10 has a stopper portion 10a on the base end side.
is configured to come into contact with the edge portion 2a of the support leg 2 to restrict the maximum opening angle of the pressure bonding plate 12.
本実施例は以上のような構成よりなるので、回転材３′
の軸部１３から底板３’ ｃまでの距＃Ｌ３分圧縮バネ
７を支持脚２側へずらして配置することにより、圧縮バ
ネ７の選定に際して、圧着板１２の閉状態の時の圧縮バ
ネ７の長さＬ４及び圧着板１２が開状態の時の圧縮バネ
の長さを長くして圧縮バネの選択幅を広げられる。そし
て、圧着板１２の重量、重心を測定し、ついで軸部１３
及び軸１１の位置、ストッパ９と取付部材１０との係合
位置を設定する。それから、操作性の面から、圧着板１
２を閉じた状態から開くのに要する力Ｆ３、圧着板１２
を開いた状態から閉じるのに要する力Ｆ４及び圧着板１
２の静止開放角度を設定し、バネ力による圧着板１２を
軸１１回りに開かせようとするモーメントと、圧着板１
２の重量によって圧着板１２を閉じようとするモーメン
トとのバランスにより、圧着板１２が閉じた際に圧着バ
ネ７の長さがＬ４における該バネ７のバネ力Ｒ１’と、
圧着板１２が開放された際に圧縮バネ７の長さがＬ２に
おける該バネ７のバネ力とを求め、そして許容応力内に
バネ力Ｒ１’を含み、かつ繰り返し回数が十分な圧縮バ
ネを選定する。Since this embodiment has the above configuration, the rotating member 3'
By shifting the compression spring 7 toward the support leg 2 by the distance #L3 from the shaft portion 13 to the bottom plate 3'c, when selecting the compression spring 7, the compression spring 7 when the crimp plate 12 is in the closed state can be adjusted. The selection range of compression springs can be expanded by increasing the length L4 and the length of the compression spring when the compression plate 12 is in the open state. Then, the weight and center of gravity of the crimp plate 12 are measured, and then the shaft portion 13 is measured.
Then, the position of the shaft 11 and the engagement position between the stopper 9 and the mounting member 10 are set. Then, from the viewpoint of operability, we decided to use the crimp plate 1.
The force F3 required to open 2 from the closed state, the pressure bonding plate 12
Force F4 and crimp plate 1 required to close from open state
The static opening angle of 2 is set, and the moment that tries to open the crimp plate 12 around the axis 11 due to the spring force, and the
When the pressure bonding plate 12 is closed, the spring force R1' of the pressure bonding spring 7 when the length of the pressure bonding spring 7 is L4 is determined by the balance with the moment of closing the pressure bonding plate 12 due to the weight of 2.
Find the spring force of the spring 7 when the length of the compression spring 7 is L2 when the crimp plate 12 is released, and select a compression spring that includes the spring force R1' within the allowable stress and has a sufficient number of repetitions. do.
乙のように選定された圧縮バネ７を用いた圧着板開閉装
置１′は、圧着板１２が閉じられた状態において、圧着
板１２自体の重量による回転モーメントから圧縮バネ７
のバネＲ１’の回転モーメントを差し引いた軸１１回り
の回転モーメントにより圧着板１２は閉状態を保持して
原稿を画像形成装置のプラテンへ密着する。また、圧着
板１２が前述軸１１回りの回転モーメントより大きな力
により開放された場合、圧縮バネ７のバネ力の回転モー
メントから圧着板１２自体の重量による回転モーメン１
−を差し引いた軸１１回りの回転モーメントにより、圧
着板１２は、開放付勢され、かつストッパ部１０ａが支
持脚２のエツジ部と当接して開放角度を規制される。In the crimp plate opening/closing device 1' using the compression spring 7 selected as shown in Part B, when the crimp plate 12 is closed, the compression spring 7 is
Due to the rotational moment around the shaft 11 minus the rotational moment of the spring R1', the pressure bonding plate 12 is maintained in the closed state and the original is brought into close contact with the platen of the image forming apparatus. Furthermore, when the crimp plate 12 is released by a force larger than the rotational moment around the shaft 11, a rotational moment 1 due to the weight of the crimp plate 12 itself is generated from the rotational moment of the spring force of the compression spring 7.
The pressure bonding plate 12 is urged to open due to the rotational moment around the shaft 11 minus -, and the stopper portion 10a contacts the edge portion of the support leg 2 to restrict the opening angle.
（ト） 発明の効果
以上、説明したように、本発明によると、圧縮バネの回
動部材側の端部を、該回動部材の回動中心より、圧縮バ
ネの規制部材側の端部に対して遠い位置に有するので、
圧縮バネの占有スペースを小さくして、圧着板を小型化
できる。(G) Effects of the Invention As explained above, according to the present invention, the end of the compression spring on the rotating member side is moved from the center of rotation of the rotating member to the end of the compression spring on the regulating member side. Since it is located far away from the
By reducing the space occupied by the compression spring, the crimp plate can be made smaller.
第１図は本発明に係る圧着板開閉装置を示す側断面図で
あり、第２図はその要部を示す斜視図である。そして、
第３図及び第４図は従来例の構成と動作とを示す側断面
図である。
１．１′・・・圧着板開閉装置 、 ２・・・支持脚
、３゜３′・・回動部材 、 ５，１３ａ・・回動中
心、６・・・軸材 、 ９・・・規制部材 、 １０・
・・取付部材 、１２・・・圧着板 。
第１図
第３図
第４図FIG. 1 is a side sectional view showing a crimp plate opening/closing device according to the present invention, and FIG. 2 is a perspective view showing the main parts thereof. and,
3 and 4 are side sectional views showing the structure and operation of a conventional example. 1.1'...Crimp plate opening/closing device, 2...Support leg
, 3゜3'...Rotation member, 5,13a...Rotation center, 6...Shaft member, 9...Restriction member, 10.
...Mounting member, 12...Crimp plate. Figure 1 Figure 3 Figure 4
Claims (1)
れた圧着板と、前記支持脚に回転自在に支持された回動
部材に突設された軸材に嵌挿され、かつ前記回動部材と
前記軸材に対して摺動自在に嵌挿されている規制部材と
の間に縮設されている圧縮バネと、を備え、前記圧縮バ
ネのバネ力により前記圧着板を開放付勢してなる圧着板
開閉装置において、 前記圧縮バネの回動部材側の端部を、該回動部材の回動
中心より、前記圧縮バネの規制部材側の端部に対して遠
い位置に設置した、 ことを特徴とする圧着板開閉装置。(1) A crimping plate fixed to a mounting member rotatably supported by a support leg, and a shaft member protruding from a rotating member rotatably supported by the support leg; a compression spring compressed between a rotating member and a regulating member slidably inserted into the shaft member, and the compression plate is opened by the spring force of the compression spring. In the crimping plate opening/closing device, the end of the compression spring on the rotating member side is located at a position farther from the center of rotation of the rotating member than the end of the compression spring on the regulating member side. A crimp plate opening/closing device characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62313250A JP2615101B2 (en) | 1987-12-11 | 1987-12-11 | Crimping plate opening and closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62313250A JP2615101B2 (en) | 1987-12-11 | 1987-12-11 | Crimping plate opening and closing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01154136A true JPH01154136A (en) | 1989-06-16 |
| JP2615101B2 JP2615101B2 (en) | 1997-05-28 |
Family
ID=18038932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62313250A Expired - Lifetime JP2615101B2 (en) | 1987-12-11 | 1987-12-11 | Crimping plate opening and closing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2615101B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10215312A1 (en) * | 2002-04-08 | 2003-11-06 | Heidelberger Druckmasch Ag | Operating method for rotating mirror or prism for exposing printing form for printing machine, by using cleaning unit to remove dirt mechanically by pressing against surface |
| JP2008164953A (en) * | 2006-12-28 | 2008-07-17 | Kyocera Mita Corp | Document holder of image forming device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62189474U (en) * | 1986-05-22 | 1987-12-02 |
-
1987
- 1987-12-11 JP JP62313250A patent/JP2615101B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62189474U (en) * | 1986-05-22 | 1987-12-02 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10215312A1 (en) * | 2002-04-08 | 2003-11-06 | Heidelberger Druckmasch Ag | Operating method for rotating mirror or prism for exposing printing form for printing machine, by using cleaning unit to remove dirt mechanically by pressing against surface |
| JP2008164953A (en) * | 2006-12-28 | 2008-07-17 | Kyocera Mita Corp | Document holder of image forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2615101B2 (en) | 1997-05-28 |
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