JP2003159695A - Sheet punching device and image forming device having the same - Google Patents
Sheet punching device and image forming device having the sameInfo
- Publication number
- JP2003159695A JP2003159695A JP2001358410A JP2001358410A JP2003159695A JP 2003159695 A JP2003159695 A JP 2003159695A JP 2001358410 A JP2001358410 A JP 2001358410A JP 2001358410 A JP2001358410 A JP 2001358410A JP 2003159695 A JP2003159695 A JP 2003159695A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- punching
- punching device
- punch
- image forming
- 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
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Registering Or Overturning Sheets (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シートにパンチ穴
を形成するためのシート穿孔装置及び該装置を備えた画
像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet punching device for forming punch holes in a sheet and an image forming apparatus equipped with the device.
【０００２】[0002]
【従来の技術】従来、画像形成装置に接続されるシート
後処理装置におけるシート穿孔装置は、複数個の穿孔部
材をシート搬送方向に直交方向もしくはある程度角度を
持たせた位置に配置して、それらを穿孔動作させること
で２穴や３穴などの複数穴の穿孔を行う構成のものが知
られている。また、別のシート穿孔装置としては、何枚
かのシートをいったん保持してからシート束をまとめて
穿孔するものや、搬送手段をいったん停止させること
で、搬送中のシートを停止させて穿孔を行い、穿孔後に
再び搬送を行うものが知られている。2. Description of the Related Art Conventionally, a sheet punching apparatus in a sheet post-processing apparatus connected to an image forming apparatus has a plurality of punching members arranged in a direction orthogonal to a sheet conveying direction or at a position having a certain angle. There is known a structure in which a plurality of holes such as two holes and three holes are punched by performing a punching operation. Further, as another sheet punching device, one that holds several sheets and then punches a bundle of sheets collectively, or by stopping the conveying means once, the sheet being conveyed is stopped and punched. It is known to carry out and carry again after punching.
【０００３】[0003]
【発明が解決しようとする課題】しかし、前者のような
複数の穿孔部材により穿孔を行うシート穿孔装置では、
穴数の変更や、それに伴う穴ピッチの変更手段が非常に
複雑かつ困難であると共に、複数のパンチを用いるため
に装置全体の大型化及びコストの増大を招いてしまうと
いう問題があった。However, in the sheet punching device for punching with a plurality of punching members like the former,
There is a problem in that it is very complicated and difficult to change the number of holes and the change of the hole pitches associated therewith, and the use of a plurality of punches increases the size of the entire apparatus and increases the cost.
【０００４】また、後者のようにシートを停止させてか
ら穿孔を行う手段においては、画像処理速度およびシー
ト搬送速度の高速化により、シートがシート穿孔装置か
ら排出されていないにも関わらず次の用紙が搬送されて
紙詰まり等を起こしてしまい、このため穿孔装置の高速
処理化を図ることが困難であった。Further, in the latter means for punching after the sheet is stopped, the following processing is performed even though the sheet is not discharged from the sheet punching device due to the increase in the image processing speed and the sheet conveying speed. Since the paper is conveyed and causes paper jam, it is difficult to increase the processing speed of the punching device.
【０００５】本発明は、このような課題に鑑みてなされ
たもので、穴数や穴ピッチの変更が容易で、紙詰まりが
なく、高速処理化を可能にしたシート穿孔装置を提供す
ることを目的とする。The present invention has been made in view of the above problems, and it is an object of the present invention to provide a sheet punching device in which the number of holes and the hole pitch can be easily changed, paper jams can be prevented, and high-speed processing can be achieved. To aim.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、シートの一側端部に配置された単一のパ
ンチを有する穿孔手段と、前記穿孔手段による穿孔中に
前記パンチを中心とするシートの回動を防止するシート
規制手段と、を備えていることを特徴とする。In order to solve the above-mentioned problems, the present invention provides a punching means having a single punch arranged at one end of a sheet, and the punching means during punching by the punching means. And a sheet restricting unit for preventing rotation of the centered sheet.
【０００７】また、本発明は、前記シート規制手段は、
前記穿孔手段と同期してシートを押圧するシート押圧手
段であることを特徴とする。Further, according to the present invention, the sheet regulating means is
It is characterized in that it is a sheet pressing means for pressing the sheet in synchronization with the punching means.
【０００８】また、本発明は、前記シート規制手段は、
前記穿孔手段側のシート側端部を規制する規制壁である
ことを特徴とする。According to the present invention, the sheet regulating means is
It is characterized in that it is a regulation wall for regulating the sheet side end portion on the side of the punching means.
【０００９】また、本発明は、前記穿孔手段のシート搬
送方向上流側に、シート側端部を前記規制壁に当接させ
る斜行搬送ローラを備えたことを特徴とする。Further, the present invention is characterized in that an oblique conveying roller for bringing a sheet side end portion into contact with the regulating wall is provided on the upstream side of the punching means in the sheet conveying direction.
【００１０】また、本発明は、前記穿孔手段の上流に、
シートがループ状に湾曲可能なループ作成空間を備えて
いることを特徴とする。Further, according to the present invention, upstream of the perforating means,
The sheet is provided with a loop forming space that can be curved in a loop shape.
【００１１】また、本発明の画像形成装置は、上記いず
れかに記載のシート穿孔装置と、画像形成手段とを備え
ることを特徴とする。An image forming apparatus of the present invention is characterized by including the sheet punching device described in any one of the above, and an image forming unit.
【００１２】[0012]
【発明の実施の形態】〈第１実施の形態〉図１は、本発
明に係るシート穿孔装置の第１実施の形態を示すもの
で、単一のシート穿孔手段をシートの一側端部に配置
し、他側端部に穿孔手段と対向してシート押圧部材を配
置した構成の一例を示している。BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> FIG. 1 shows a first embodiment of a sheet punching device according to the present invention, in which a single sheet punching means is provided at one end of a sheet. An example of a configuration in which the sheet pressing member is arranged and the sheet pressing member is arranged at the other end to face the punching means.
【００１３】シートの一側端部に、一本のパンチ１と、
このパンチ１を押すカム２の組合せによるシート穿孔手
段ＡがシートＳの一側端部に配置されている。図２に、
穿孔手段の簡略な構成を示している。パンチ１は弾性部
材１１により常時カム２に押し当てられており、カム２
が駆動源（図示せず）によって回転させられると上下方
向に往復運動を行う。また、搬送路上部１４ａには、パ
ンチの動きを規制するためにスライド軸受１２が配置さ
れ、パンチ１を搬送路下部１４ｂにダイスとして設けら
れたダイス穴１５へと導いている。At one end of the sheet, one punch 1
Sheet punching means A formed by a combination of cams 2 for pushing the punch 1 is arranged at one end of the sheet S. In Figure 2,
The simple structure of a piercing means is shown. The punch 1 is constantly pressed against the cam 2 by the elastic member 11,
When it is rotated by a drive source (not shown), it reciprocates vertically. A slide bearing 12 is arranged in the upper part 14a of the transport path to regulate the movement of the punch, and guides the punch 1 to a die hole 15 provided as a die in the lower part 14b of the transport path.
【００１４】上記パンチ１と搬送路の中心線をはさんで
対向してシート押圧部材３が配置されている。シート押
圧部材３は、駆動源のトルクを伝える軸９上に配置され
たカム４に押されることで穿孔の際同期してシート上面
部Ｓａ方向に可動である。A sheet pressing member 3 is arranged so as to face the punch 1 with the center line of the conveying path therebetween. The sheet pressing member 3 is movable by the cam 4 arranged on the shaft 9 transmitting the torque of the driving source in the direction of the sheet upper surface Sa in synchronization with the punching when the sheet 4 is punched.
【００１５】搬送手段として搬送ローラ５がパンチ１の
上流に配置され、同様に、シート穿孔手段にシートＳが
進入してきたのを検知するために、シート端検知センサ
６がパンチ１の上流に配置されている。As a conveying means, a conveying roller 5 is arranged upstream of the punch 1, and similarly, a sheet end detecting sensor 6 is arranged upstream of the punch 1 in order to detect that the sheet S has entered the sheet punching means. Has been done.
【００１６】搬送ローラ５とパンチ１の間の搬送路１５
ａに、穿孔時にシートＳがループを形成することが可能
な空間７ａを構成するループ空間形成部７が設けられて
いる。シート穿孔手段Ａの下流には排出ローラ８が配置
されている。A transport path 15 between the transport roller 5 and the punch 1.
A loop space forming portion 7 that forms a space 7a in which the sheet S can form a loop at the time of punching is provided in a. A discharge roller 8 is arranged downstream of the sheet punching means A.
【００１７】次に、シート穿孔装置の動作を説明する。Next, the operation of the sheet punching device will be described.
【００１８】画像形成装置(図示せず)において画像形成
を完了したシートＳが常時回転している搬送ローラ５へ
と導かれる。パンチ１の上流にはシート端検知センサ６
が配置されており、シートＳの搬入を検知すると図示し
ない制御部でカム２、４の回転を制御し、パンチ１とシ
ート押圧部材３を同期させてシートＳの上面部に向かっ
て往復運動させる。この際、カム２が一回転すると、パ
ンチ１は所定の位置から動き始め、シートＳを穿孔し、
再び所定の位置に戻る。また、押圧部材３はパンチ１と
同様に往復運動を行い、シートＳの上面部に接すること
で、穿孔時の力によりシートＳが斜行移動するのを防
ぐ。この時のパンチ１、シート押圧部材３の動作を図３
から７を用いて説明する。The sheet S on which image formation has been completed in the image forming apparatus (not shown) is guided to the constantly rotating conveyance roller 5. A sheet edge detection sensor 6 is provided upstream of the punch 1.
When the sheet S is detected to be carried in, the rotation of the cams 2 and 4 is controlled by a control unit (not shown), and the punch 1 and the sheet pressing member 3 are synchronized to reciprocate toward the upper surface of the sheet S. . At this time, when the cam 2 makes one rotation, the punch 1 starts moving from a predetermined position to punch the sheet S,
Return to the predetermined position again. Further, the pressing member 3 reciprocates similarly to the punch 1 and comes into contact with the upper surface of the sheet S to prevent the sheet S from obliquely moving due to the force at the time of punching. The operation of the punch 1 and the sheet pressing member 3 at this time is shown in FIG.
The description will be made using 7 to 7.
【００１９】図３はパンチ１、シート押圧部材３の初期
状態を示している。この時、パンチ１の刃先（外周の長
い部分）１ａとシート押圧部材３の底部３ａとは同じ高
さになるように配置されている。シート押圧部材３に
は、弾性部材１３が備えられている。FIG. 3 shows the initial state of the punch 1 and the sheet pressing member 3. At this time, the blade edge (long peripheral portion) 1a of the punch 1 and the bottom portion 3a of the sheet pressing member 3 are arranged at the same height. The sheet pressing member 3 is provided with an elastic member 13.
【００２０】次に、駆動源からトルクが軸９に伝えられ
ることで、パンチ刃先１ａがシート上面部Ｓａに接する
（図４）。この時、シート押圧部材３の底部３ａも同時
にシート上面部Ｓａに接する。そして、パンチ１がシー
トＳに穿孔中には、シート押圧部材底部３ａはシート上
面部Ｓａに接し続けている（図５）。穿孔が終了し、パ
ンチ１がシートＳから離れると同時に、シート上面部Ｓ
ａに接していたシート押圧部材３の底部３ａもシート上
面部Ｓａから離れ（図６）、初期の位置に戻る（図
７）。Next, torque is transmitted from the drive source to the shaft 9, whereby the punch blade edge 1a contacts the sheet upper surface portion Sa (FIG. 4). At this time, the bottom portion 3a of the sheet pressing member 3 also contacts the sheet upper surface portion Sa at the same time. While the punch 1 is punching the sheet S, the sheet pressing member bottom portion 3a continues to contact the sheet upper surface portion Sa (FIG. 5). When the punching is completed and the punch 1 is separated from the sheet S, at the same time, the sheet upper surface portion S
The bottom portion 3a of the sheet pressing member 3 that was in contact with a is also separated from the sheet upper surface portion Sa (FIG. 6) and returns to the initial position (FIG. 7).
【００２１】パンチ１と搬送ローラ５の間の搬送路上に
ループ空間形成部７を設けることで、穿孔時のシートＳ
のループを可能にし、紙詰まりを防いでいる。穿孔処理
を施されたシートＳはそのまま排出ローラ８に導かれ、
シート穿孔装置外に排出される。By providing the loop space forming portion 7 on the conveying path between the punch 1 and the conveying roller 5, the sheet S at the time of punching is formed.
Loops to prevent paper jams. The punched sheet S is guided to the discharge roller 8 as it is,
It is discharged to the outside of the sheet punching device.
【００２２】〈第２実施の形態〉図８は第２実施の形態
を示すものである。第２実施の形態では、第１実施の形
態にあったシート押圧部材３をなくし、斜行移動防止部
材として、穿孔手段Ａ側のシート側端部に近接する位置
に壁部材１０を設けている。<Second Embodiment> FIG. 8 shows a second embodiment. In the second embodiment, the sheet pressing member 3 in the first embodiment is eliminated, and the wall member 10 is provided as a skew movement preventing member at a position close to the sheet side end on the punching means A side. .
【００２３】ここで、搬送されたシートＳは穿孔時の力
によって回転しようとするが、その際壁部材１０にシー
トＳが押し当てられることで斜行移動を防止することが
できる。この構成により、装置の構成をシンプルにする
ことができ、コストも安くすることができる。Here, the conveyed sheet S tries to rotate due to the force at the time of punching, but the sheet S is pressed against the wall member 10 at that time, so that the skew movement can be prevented. With this configuration, the configuration of the device can be simplified and the cost can be reduced.
【００２４】〈第３実施の形態〉図９は第３実施の形態
を示すものである。第３実施の形態第では、搬送ローラ
５を搬送方向に直交方向に対して角度を持たせた構成に
している。これによって、正確にシートＳを壁部材１０
に突き当てることができ、シートの斜行移動を確実に防
止することができる。<Third Embodiment> FIG. 9 shows a third embodiment. In the third embodiment, the carrying roller 5 has a configuration in which the carrying direction is angled with respect to the orthogonal direction. As a result, the sheet S is accurately attached to the wall member 10.
It is possible to reliably prevent the skewed movement of the sheet.
【００２５】[0025]
【発明の効果】以上、詳述したように、本発明によれ
ば、シートの一側端部に配置された単一のパンチを有す
る穿孔手段と、前記穿孔手段による穿孔中のシートの移
動を防止するシート規制手段と、を備えているので、複
数の穴を穿孔する際にも、穿孔手段の位置を移動した
り、穿孔手段間隔を調節したりすることなく、穿孔速度
や穿孔回数を変更するだけで穴ピッチや穴数を容易に変
更することができる。As described above in detail, according to the present invention, the perforating means having a single punch arranged at one end of the sheet and the movement of the sheet during perforation by the perforating means. Since it is provided with a sheet restricting means for preventing, even when punching a plurality of holes, the punching speed and the number of times of punching are changed without moving the position of the punching means or adjusting the interval of the punching means. The hole pitch and the number of holes can be easily changed by simply doing.
【００２６】また、穿孔中のシート規制手段を設けるこ
とにより、穿孔時の力でシートが斜行するのを防止する
ことができ、ジャムや穴ピッチの不正確さを無くし、か
つ、シートの搬送を止めることなく穿孔処理を施すこと
ができる。したがって、画像処理速度が上がった場合
や、搬送速度が上がった場合にも、穿孔処理の高速化の
実現を可能とすることができる。Further, by providing the sheet regulation means during perforation, it is possible to prevent the sheet from skewing due to the force at the time of perforation, eliminate the inaccuracy of jam and hole pitch, and convey the sheet. The drilling process can be performed without stopping. Therefore, even when the image processing speed is increased or the conveyance speed is increased, it is possible to realize high-speed punching processing.
【００２７】また、上記構成により、シート穿孔装置を
小型化することができ、また複数の穿孔部を設けなくて
も良いので、コスト削減も行うことが可能である。Further, with the above configuration, the sheet punching device can be downsized, and since it is not necessary to provide a plurality of punching portions, it is possible to reduce the cost.
【００２８】また、穿孔手段の上流にシートがループ可
能なループ空間形成部を備えることで、シートの動きの
矯正を正確に行うことができるという効果がある。Further, by providing the loop space forming portion capable of looping the sheet upstream of the punching means, there is an effect that the movement of the sheet can be accurately corrected.
【図１】本発明の第１実施の形態に係るシート穿孔装置
の概略構成を示す斜視図である。FIG. 1 is a perspective view showing a schematic configuration of a sheet punching device according to a first embodiment of the present invention.
【図２】シート穿孔手段の具体例を示す断面図である。FIG. 2 is a sectional view showing a specific example of sheet punching means.
【図３】第１実施の形態のシート穿孔装置の穿孔処理動
作を示す断面図である。FIG. 3 is a cross-sectional view showing a punching processing operation of the sheet punching device according to the first embodiment.
【図４】図３に続く穿孔処理動作を示す断面図である。FIG. 4 is a cross-sectional view showing a punching processing operation subsequent to FIG.
【図５】図４に続く穿孔処理動作を示す断面図である。FIG. 5 is a cross-sectional view showing a punching process operation subsequent to FIG.
【図６】図５に続く穿孔処理動作を示す断面図である。FIG. 6 is a cross-sectional view showing a punching process operation subsequent to FIG.
【図７】図６に続く穿孔処理動作を示す断面図である。FIG. 7 is a cross-sectional view showing a punching process operation subsequent to FIG.
【図８】本発明の第２実施の形態のシート穿孔装置の概
略構成を示す斜視図である。FIG. 8 is a perspective view showing a schematic configuration of a sheet punching device according to a second embodiment of the present invention.
【図９】本発明の第３実施の形態のシート穿孔装置の概
略構成を示す斜視図である。FIG. 9 is a perspective view showing a schematic configuration of a sheet punching device according to a third embodiment of the present invention.
１ パンチ ２ カム ３ シート押圧部材 ４ カム ５ 搬送ローラ ７ ループ空間形成部 １０ 規制壁（壁部材） Ａ 穿孔手段 Ｓ シート 1 punch 2 cams 3 Sheet pressing member 4 cams 5 Conveyor rollers 7 Loop space formation section 10 Restriction wall (wall member) A punching means S sheet
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ６５Ｈ 37/04 Ｂ６５Ｈ 37/04 Ｚ (72)発明者 早川 保芳 東京都大田区下丸子３丁目30番２号 キヤ ノン株式会社内 Ｆターム(参考） 3C060 AA20 BA01 BD10 BE10 3F102 AA01 AB01 BA02 BB02 BB04 DA05 DA12 EA03 EA06 EA14 EC12 FA02 FA08 3F108 GA01 GB07 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B65H 37/04 B65H 37/04 Z (72) Inventor Yasuyoshi Hayakawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Issue Canon Inc. F-term (reference) 3C060 AA20 BA01 BD10 BE10 3F102 AA01 AB01 BA02 BB02 BB04 DA05 DA12 EA03 EA06 EA14 EC12 FA02 FA08 3F108 GA01 GB07
Claims (6)
ンチを有する穿孔手段と、 前記穿孔手段による穿孔中に前記パンチを中心とするシ
ートの回動を防止するシート規制手段と、を備えている
ことを特徴とするシート穿孔装置。1. A perforating means having a single punch disposed at one end of a sheet, and a sheet restricting means for preventing rotation of the sheet around the punch during perforation by the perforating means, A sheet punching device comprising:
同期してシートを押圧するシート押圧手段であることを
特徴とする請求項１記載のシート穿孔装置。2. The sheet punching device according to claim 1, wherein the sheet regulating unit is a sheet pushing unit that pushes a sheet in synchronization with the punching unit.
のシート側端部を規制する規制壁であることを特徴とす
る請求項１記載のシート穿孔装置。3. The sheet punching device according to claim 1, wherein the sheet regulating means is a regulating wall that regulates a sheet side end portion on the punching means side.
に、シート側端部を前記規制壁に当接させる斜行搬送ロ
ーラを備えたことを特徴とする請求項３記載のシート穿
孔装置。4. The sheet punching device according to claim 3, further comprising a skew feeding roller for bringing a sheet side end portion into contact with the regulation wall, on the upstream side of the punching means in the sheet feeding direction.
状に湾曲可能なループ作成空間を備えていることを特徴
とする請求項１ないし４のいずれかに記載のシート穿孔
装置。5. The sheet punching device according to claim 1, further comprising a loop forming space in which the sheet can be bent in a loop shape, upstream of the punching means.
ート穿孔装置と、画像形成手段とを備えることを特徴と
する画像形成装置。6. An image forming apparatus comprising the sheet punching device according to claim 1 and an image forming unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001358410A JP4143291B2 (en) | 2001-11-22 | 2001-11-22 | Sheet punching apparatus and image forming apparatus provided with the apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001358410A JP4143291B2 (en) | 2001-11-22 | 2001-11-22 | Sheet punching apparatus and image forming apparatus provided with the apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003159695A true JP2003159695A (en) | 2003-06-03 |
| JP4143291B2 JP4143291B2 (en) | 2008-09-03 |
Family
ID=19169594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001358410A Expired - Fee Related JP4143291B2 (en) | 2001-11-22 | 2001-11-22 | Sheet punching apparatus and image forming apparatus provided with the apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4143291B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007314342A (en) * | 2006-05-29 | 2007-12-06 | Canon Inc | Skew correcting device, sheet processing device, and image forming device |
| JP2012125893A (en) * | 2010-12-16 | 2012-07-05 | Canon Inc | Punching device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6162755U (en) * | 1984-09-28 | 1986-04-28 | ||
| JP3005191U (en) * | 1994-06-13 | 1994-12-13 | サカタインクス株式会社 | Register punch |
| JPH07186098A (en) * | 1993-12-28 | 1995-07-25 | Sharp Corp | Paper punching device for image forming device |
| JPH10225899A (en) * | 1996-12-09 | 1998-08-25 | Fuji Photo Film Co Ltd | Boring machine or strip member, and boring chip recovering method |
| JP2001047398A (en) * | 1998-07-24 | 2001-02-20 | Ricoh Co Ltd | Sheet punch |
-
2001
- 2001-11-22 JP JP2001358410A patent/JP4143291B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6162755U (en) * | 1984-09-28 | 1986-04-28 | ||
| JPH07186098A (en) * | 1993-12-28 | 1995-07-25 | Sharp Corp | Paper punching device for image forming device |
| JP3005191U (en) * | 1994-06-13 | 1994-12-13 | サカタインクス株式会社 | Register punch |
| JPH10225899A (en) * | 1996-12-09 | 1998-08-25 | Fuji Photo Film Co Ltd | Boring machine or strip member, and boring chip recovering method |
| JP2001047398A (en) * | 1998-07-24 | 2001-02-20 | Ricoh Co Ltd | Sheet punch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007314342A (en) * | 2006-05-29 | 2007-12-06 | Canon Inc | Skew correcting device, sheet processing device, and image forming device |
| JP2012125893A (en) * | 2010-12-16 | 2012-07-05 | Canon Inc | Punching device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4143291B2 (en) | 2008-09-03 |
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