JPH02147448U - - Google Patents
Info
- Publication number
- JPH02147448U JPH02147448U JP5674889U JP5674889U JPH02147448U JP H02147448 U JPH02147448 U JP H02147448U JP 5674889 U JP5674889 U JP 5674889U JP 5674889 U JP5674889 U JP 5674889U JP H02147448 U JPH02147448 U JP H02147448U
- Authority
- JP
- Japan
- Prior art keywords
- detection
- support shaft
- displacement
- detection rod
- tip
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Controlling Sheets Or Webs (AREA)
Description
第１図は、この考案の実施例である用紙重送検
知装置の外観斜視図である。第２図は同用紙重送
検知装置の動作を説明する図である。第３図は同
用紙重送検知装置が適用されている画像形成装置
の概略構成図である。
１０……用紙重送検知装置、１１……検知ロー
ラ、１２……支軸、１３……アーム、１４……検
知棒、１５……透過型光センサ（変位検知手段）
。
FIG. 1 is an external perspective view of a paper double feed detection device which is an embodiment of this invention. FIG. 2 is a diagram illustrating the operation of the paper double feed detection device. FIG. 3 is a schematic configuration diagram of an image forming apparatus to which the paper double feed detection device is applied. 10... Paper double feed detection device, 11... Detection roller, 12... Support shaft, 13... Arm, 14... Detection rod, 15... Transmission type optical sensor (displacement detection means)
.
Claims (1)
れるまでの用紙が搬送されるガイド板の上方に、
搬送方向に対し垂直に回転自在に軸支された支軸
と、 前記支軸に固定されたアームに軸支され、ガイ
ド板上を搬送される用紙に当接・摺動する検知ロ
ーラと、 前記支軸のガイド板より突き出る部分に固定さ
れた検知棒と、 前記検知棒の先端の変位を検知する変位検知手
段と、 を設け、 ガイド板上を搬送される用紙の厚みによる前記
検知ローラの僅かな上下の変位に応じて、前記ア
ームがα゜だけ回転移動すると、同一円周方向へ
支軸もα゜回転し、検知棒もα゜回転移動すると
き、前記支軸の中心から前記検知棒の先端までの
長さを、前記検知ローラの僅かな変位量に対する
検知棒の先端での変位量が充分に拡大される長さ
に構成したことを特徴とする用紙重送検知装置。[Claim for Utility Model Registration] Above the guide plate where the paper is fed from the cassette until it is fed into the process,
a support shaft rotatably supported perpendicular to the transport direction; a detection roller that is supported by an arm fixed to the support shaft and contacts and slides on the paper being transported on the guide plate; a detection rod fixed to a portion of the support shaft protruding from the guide plate; and a displacement detection means for detecting displacement of the tip of the detection rod; When the arm rotates by α° in response to vertical displacement, the support shaft also rotates by α° in the same circumferential direction, and when the detection rod also rotates by α°, the detection rod moves away from the center of the support shaft. A paper double feed detection device characterized in that the length to the tip of the detection rod is configured to a length that sufficiently increases the amount of displacement at the tip of the detection rod with respect to the slight amount of displacement of the detection roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5674889U JPH02147448U (en) | 1989-05-16 | 1989-05-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5674889U JPH02147448U (en) | 1989-05-16 | 1989-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02147448U true JPH02147448U (en) | 1990-12-14 |
Family
ID=31580850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5674889U Pending JPH02147448U (en) | 1989-05-16 | 1989-05-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02147448U (en) |
-
1989
- 1989-05-16 JP JP5674889U patent/JPH02147448U/ja active Pending
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