JPS6327911B2 - - Google Patents
Info
- Publication number
- JPS6327911B2 JPS6327911B2 JP974880A JP974880A JPS6327911B2 JP S6327911 B2 JPS6327911 B2 JP S6327911B2 JP 974880 A JP974880 A JP 974880A JP 974880 A JP974880 A JP 974880A JP S6327911 B2 JPS6327911 B2 JP S6327911B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- sheet
- suction holes
- suction
- row
- 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.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 description 12
- 238000004804 winding Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
- B41L29/00—Devices for attaching printing elements or formes to supports
- B41L29/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
- B41L29/14—Clamping devices
Description
【発明の詳細な説明】
本発明はフアクシミリや印刷装置に於いて、送
信原稿、記録紙や印刷用紙の如きシートをドラム
に巻装固定するシート保持装置に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet holding device for winding and fixing a sheet such as a transmission original, recording paper, or printing paper around a drum in a facsimile machine or a printing device.
フアクシミリや印刷装置等に於いて、送信原
稿、記録紙や印刷用紙の如きシートをドラムに巻
装固定するシート保持装置は、従来から種々のも
のが提案され、またそのいくつかのものが実用化
されている。 In facsimile machines, printing devices, etc., various types of sheet holding devices have been proposed for wrapping and fixing sheets such as transmission documents, recording paper, and printing paper around drums, and some of them have been put into practical use. has been done.
かかるシート保持装置の一つとして、ドラムの
周面部に、そこに巻装されるシートの先端部と後
端部を吸引する複数個の吸引孔を各々そのドラム
母線方向に沿つて有し、前記吸引孔の空気吸引力
によつてシートをドラムの外周面に吸着保持した
ものが知られている。 One such sheet holding device has a plurality of suction holes on the circumferential surface of the drum, each along the generatrix direction of the drum, for suctioning the leading end and the trailing end of the sheet wound thereon. It is known that the sheet is suctioned and held on the outer peripheral surface of the drum by the air suction force of the suction holes.
上述の如き吸引式シート保持装置に於いて、サ
イズが異つた複数種類のシートを選択的に保持す
るには、各種サイズのシートに対応して複数個の
吸引孔を各々ドラム母線方向に沿つて複数列設
け、選択された列の吸引孔に対して負圧を与えれ
ば良い。この場合、各列の吸引孔に負圧を導く負
圧供給通路やそれの切換装置を簡素化するために
は、可及的に吸引孔の列数は少ないことが良く、
共用できる吸引孔列は共通化されていることが好
ましい。しかし、シートの幅サイズ、即ち巻装時
にドラムの母線方向に沿うサイズが異つているシ
ートのための吸引孔列をも共通化すると、この吸
引孔が対応するシートのうち最小幅のものに応じ
た範囲内に設けられていれば、それより大きい幅
のシートを保持する際にはシートの両側端領域が
十分に吸着保持されず、またこれとは反対に吸引
孔が対応するシートのうち最大幅のものに応じた
範囲内に設けられていれば、それより小さい幅の
シートを保持する際にはドラムの両軸端領域にあ
る吸引孔より負圧漏れが生じ、十分な吸引力が得
られなくなることがある。 In the above-mentioned suction type sheet holding device, in order to selectively hold multiple types of sheets of different sizes, a plurality of suction holes are provided along the drum generatrix direction, corresponding to sheets of various sizes. It is sufficient to provide a plurality of rows and apply negative pressure to the suction holes in the selected row. In this case, in order to simplify the negative pressure supply passage that guides negative pressure to the suction holes in each row and its switching device, it is better to have as few rows of suction holes as possible.
It is preferable that the suction hole rows that can be shared be shared. However, if the suction hole rows are made common for sheets that have different width sizes, that is, sizes along the generatrix direction of the drum during winding, then the suction holes will correspond to the smallest width of the corresponding sheets. If the width of the suction hole is within the width range, when holding a sheet with a width larger than that width, the side edge areas of the sheet will not be sufficiently suctioned and held. If the width is within the range corresponding to the width of the drum, negative pressure will leak from the suction holes at both ends of the drum when holding sheets with a width smaller than that, and sufficient suction power will not be achieved. It may become impossible to do so.
本発明は上述の如き事情に鑑み、シートの吸着
保持に関し不具合を生じることなく各種サイズの
シートを可及的に少数の吸引孔列をもつて選択的
に吸着保持するよう構成されたシート保持装置を
提供することを目的としている。 In view of the above-mentioned circumstances, the present invention provides a sheet holding device configured to selectively suction and hold sheets of various sizes with as few suction hole rows as possible without causing any problems in suction and holding of sheets. is intended to provide.
かかる目的は、本発明によれば、ドラムの周面
部に、そこに巻装される各種サイズのシートの先
端部と後端部を吸引する複数個の吸引孔がそのド
ラム母線方向に沿つて複数列設けられており、前
記吸引孔は各々対応するシートの幅サイズに応じ
た範囲内に設けられており、且つシートの先端部
を吸引する吸引孔のうち同一幅サイズのシートに
対応するものは共通になつているが、幅サイズが
異つたシートに対応するものは互いにドラム周方
向に異つた位置に設けられている如きシート保持
装置によつて達成される。 According to the present invention, a plurality of suction holes are provided in the peripheral surface of the drum along the generatrix direction of the drum for sucking the leading and trailing ends of sheets of various sizes wound around the peripheral surface of the drum. The suction holes are provided in rows, and the suction holes are provided within a range according to the width size of the corresponding sheet, and among the suction holes that suck the leading edge of the sheet, those corresponding to sheets of the same width size are Although common, the ability to accommodate sheets of different width sizes is achieved by sheet holding devices that are provided at different positions in the circumferential direction of the drum.
以下に添付の図を用いて本発明を実施例につい
て詳細に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.
始めに、シートをドラムに巻装固定する形式の
装置の一例として、第１図を用いてインクジエツ
ト記録方式を利用した記録装置について説明す
る。第１図に於いて、符号１は装置のケーシング
を示しており、このケーシング１内にはドラム２
が支持軸３に支持されてその軸線の周りに回転自
在に設けられている。またケーシング１にはシー
ト載置台４が設けられており、このシート載置台
４上に載置されているシートは吸盤式の給紙装置
５によつてレジストローラ６まで送られ、このレ
ジストローラによつて給紙タイミングを調整され
て前記ドラム２の外周面へ向けて給紙されるよう
になつている。ドラム２の外周へ向けて給紙され
るシートはドラムの回転に伴つてその外周に巻装
され、後述するシート保持装置によつてそのドラ
ム外周面に吸着保持される。ドラムの外周面に吸
着保持されたシートはインクジエツトヘツド７の
前方を通過する際に該インクジエツトヘツドより
噴射されるインク液滴によつてドツトマトリツク
ス式に画像を形成され、記録終了後に剥しローラ
８によつて前記ドラムより剥ぎ取られ、排紙ロー
ラ９によつて排紙台１０へ向けて排紙されるよう
になつている。 First, as an example of a device that winds and fixes a sheet around a drum, a recording device using an inkjet recording method will be described with reference to FIG. In FIG. 1, reference numeral 1 indicates a casing of the device, and inside this casing 1 there is a drum 2.
is supported by the support shaft 3 and is rotatably provided around the axis. Further, the casing 1 is provided with a sheet placing table 4, and the sheet placed on the sheet placing table 4 is fed to a registration roller 6 by a suction cup type paper feeding device 5, Therefore, the paper feeding timing is adjusted so that the paper is fed toward the outer peripheral surface of the drum 2. A sheet fed toward the outer periphery of the drum 2 is wound around the outer periphery of the drum as the drum rotates, and is held by suction on the outer periphery of the drum by a sheet holding device, which will be described later. An image is formed on the sheet held by suction on the outer peripheral surface of the drum in a dot matrix manner by ink droplets ejected from the ink jet head 7 as it passes in front of the ink jet head 7, and is peeled off after recording is completed. The paper is peeled off from the drum by a roller 8 and discharged onto a paper discharge tray 10 by a paper discharge roller 9.
第２図は本発明によるシート保持装置を備えた
ドラムの縦断面図、第３図はそのドラムの一方の
軸端領域を示す断面図、第４図はドラムの外周面
を展開して示す展開図である。ドラム２は、この
実施例の場合、複数列の吸引孔を各々ドラム母線
方向に沿つて六列有している。第一〜第三の列の
吸引孔１１，１２，１３は各々A3版のシートの
幅サイズに応じた範囲に設けられており、このう
ち第一の列の吸引孔１１はA3版及び４版のシー
トの先端部を、第二の列の吸引孔１２はA4版の
シートの後端部を、第三の列の吸引孔１３はA3
版のシート後端部を各々吸引するようになつてい
る。第四〜第六列の吸引孔１４，１５，１６は
各々B4版のシートの幅サイズに応じた範囲に設
けられており、このうち第四の列の吸引孔１４は
前記第一の列の吸引孔と前記第二の列の吸引孔と
の間にあつてB4版及びB5版のシートの先端部
を、第五の列の吸引孔１５はB5版のシートの後
端部を、第六の列の吸引孔１６はB4版のシート
の後端部を各々吸着するように設けられている。 FIG. 2 is a longitudinal cross-sectional view of a drum equipped with a sheet holding device according to the present invention, FIG. 3 is a cross-sectional view showing one shaft end region of the drum, and FIG. 4 is a developed view showing the outer peripheral surface of the drum. It is a diagram. In this embodiment, the drum 2 has six rows of suction holes each along the drum generatrix direction. The first to third rows of suction holes 11, 12, and 13 are provided in a range corresponding to the width size of the A3 sheet, and among these, the first row of suction holes 11 is for A3 and 4 sheets. The suction holes 12 in the second row are attached to the rear edge of the A4 sheet, and the suction holes 13 in the third row are attached to the A3 sheet.
The rear end of each plate sheet is suctioned. The suction holes 14, 15, 16 in the fourth to sixth rows are provided in a range corresponding to the width size of the B4 sheet, and among these, the suction holes 14 in the fourth row are in the first row. The suction holes 15 in the fifth row are located between the suction holes 15 and the suction holes in the second row, and the leading ends of the B4 and B5 sheets are located between the suction holes 15 and the suction holes in the second row. The suction holes 16 in the rows are provided so as to suck the rear end of the B4 size sheet.
前記第一〜第六列の吸引孔にはドラム２の内周
部に各々ホルダ１７〜２２を介して取付けられた
負圧供給チユーブ２３より負圧が前記負圧供給チ
ユーブ及び前記ホルダに設けられた孔を経て個別
に供給されるようになつている。前記負圧供給チ
ユーブ２３，２５，２８には、第３図に示されて
いる如く、ドラム２の一端部の軸筒部２９に対し
回転可能に取付けられた三つの回転ジヨイント３
０，３１，３２よりそれぞれ独立して前記軸筒部
２９、支持軸３、ドラム２の端部等に形成された
負圧通路３〜３５を経て負圧が供給されるように
なつている。また前記回転ジヨイント３０，３
１，３２には各々ニツプル３６〜３８が取付けら
れており、これに図には示されていない負圧供給
源からの負圧供給ホースが接続されるようになつ
ている。尚、回転ジヨイント３０〜３２と負圧供
給源装置との間には図には示されていない負圧供
給制御装置が設けられ、これによつて選択された
回転ジヨイントに対してのみ負圧が供給されるよ
うになつている。負圧供給チユーブ２４，２６，
２７は図には示されていないが、ドラム２の他端
部にて第３図に示された構造と同様の構造にて
各々個別に前記負圧供給源に接続され、これより
負圧を選択的に供給されるようになつている。 Negative pressure is provided to the first to sixth rows of suction holes from negative pressure supply tubes 23 attached to the inner peripheral portion of the drum 2 via holders 17 to 22, respectively, to the negative pressure supply tubes and the holders. It is designed to be supplied individually through holes. As shown in FIG. 3, the negative pressure supply tubes 23, 25, and 28 are provided with three rotary joints 3 rotatably attached to a shaft cylindrical portion 29 at one end of the drum 2.
Negative pressure is supplied from the cylinders 0, 31, and 32 through negative pressure passages 3 to 35 formed independently in the shaft tube portion 29, the support shaft 3, the end of the drum 2, and the like. In addition, the rotation joints 30, 3
Nipples 36 to 38 are attached to each of nipples 1 and 32, to which a negative pressure supply hose from a negative pressure supply source (not shown) is connected. Note that a negative pressure supply control device (not shown in the figure) is provided between the rotary joints 30 to 32 and the negative pressure supply source device, so that negative pressure is applied only to selected rotary joints. supply is becoming available. Negative pressure supply tube 24, 26,
27 are not shown in the figure, but are connected to the negative pressure supply source individually at the other end of the drum 2 with a structure similar to that shown in FIG. 3, and from which negative pressure is supplied. It is now available selectively.
A3版の用紙の保持を行う場合には、第一及び
第三の列の吸引孔１１，１３に対してのみ負圧が
供給され、そのシートの先端は第一の列の吸引孔
１１の空気吸引力によつてその部分にてドラム外
周面に吸着され、また後端部は第三の列の吸引孔
１３の空気吸引力によりその部分にてドラム外周
面に吸着保持される。 When holding A3 size paper, negative pressure is supplied only to the suction holes 11 and 13 in the first and third rows, and the leading edge of the sheet is exposed to the air in the suction holes 11 in the first row. The rear end portion is attracted to the drum outer circumferential surface at that portion by the suction force, and the rear end portion is adsorbed and held to the drum outer circumferential surface at that portion by the air suction force of the third row of suction holes 13.
A4版のシートの吸着保持を行う場合には、第
一の列と第二の列の吸引孔１１，１２に対し負圧
が供給される。この場合、そのシートの先端部は
第一の列の吸引孔１１の空気吸引力によりその部
分に於いてドラム外周面に吸着され、また後端部
は第二の列の吸引孔１２の空気吸引力によりその
部分に於けるドラム外周面に吸着保持される。こ
のようにA3版とA4版の用紙の吸着保持の際には
第一の列の吸引孔は共通して用いられる。 When suctioning and holding an A4 size sheet, negative pressure is supplied to the first and second rows of suction holes 11 and 12. In this case, the leading edge of the sheet is attracted to the drum's outer peripheral surface by the air suction force of the first row of suction holes 11, and the rear end of the sheet is attracted to the drum's outer peripheral surface by the air suction force of the suction holes 12 of the second row. The force attracts and holds the drum to the outer circumferential surface of the drum in that area. In this way, the first row of suction holes are commonly used when holding A3 and A4 size paper by suction.
B5版のシートの吸着保持を行う場合には、第
四の列の吸引孔１４と第五の列の吸引孔１５に対
して負圧の供給を行う。この場合、そのシートの
先端部は第四の列の吸引孔１４の空気吸引力によ
りその部分に於けるドラム外周面に吸着され、ま
た後端部は第五の列の吸引孔の空気吸引力により
その部分に於けるドラム外周面に吸着される。 When holding a B5 sheet by suction, negative pressure is supplied to the suction holes 14 in the fourth row and the suction holes 15 in the fifth row. In this case, the leading edge of the sheet is attracted to the outer peripheral surface of the drum in that area by the air suction force of the suction holes 14 in the fourth row, and the rear end is attracted to the drum outer circumferential surface at that part by the air suction force of the suction holes 14 in the fifth row. Therefore, it is attracted to the outer peripheral surface of the drum in that area.
B4版のシートの吸着保持を行う場合は、第四
の列の吸引孔１４と第六の列の吸引孔１６に対し
て負圧の供給が行われる。この場合、その用紙の
先端部は第四の列の吸引孔１４の空気吸引力によ
りその部分に於けるドラム外周面に吸着され、ま
た後端部は第六の列の吸引孔１６の空気吸引力に
よりその部分に於けるドラム外周面に吸着保持さ
れる。このように第四の列の吸引孔１４はB5版
とB4版のシートの吸着保持に際し共通して用い
られる。 When holding a B4 sheet by suction, negative pressure is supplied to the suction holes 14 in the fourth row and the suction holes 16 in the sixth row. In this case, the leading edge of the paper is attracted to the outer circumferential surface of the drum in that area by the air suction force of the suction holes 14 in the fourth row, and the trailing edge is attracted by the air suction force of the suction holes 16 in the sixth row. The force attracts and holds the drum to the outer circumferential surface of the drum in that area. In this way, the fourth row of suction holes 14 are commonly used to suction and hold sheets of B5 size and B4 size.
A4版及びA3版のシートを吸着保持していると
きと、B5版或いはB4版のシートを吸着保持して
いるときでは、その吸着保持しているシートの前
端の位置がドラム２の位相に対し第一の列の吸引
孔１１と第四の列の吸引孔１４とのドラム周方向
長さに対応する量だけ変化する。従つて、これを
補うべくドラムに対する給紙位置を決めるレジス
トローラの回転開始タイミングをシートのサイズ
に応じて変化させる必要がある。即ち、上述の如
き構成の場合には、B5版或いはB4版のシートの
際にはA4版或いはA3版のシートのときに比して
レジストローラの回転開始タイミングを所定のタ
イミングだけ遅らせてドラムに対するシートの給
紙を行うようにすれば良い。 When holding A4 and A3 sheets by suction, and when holding B5 or B4 sheets by suction, the position of the front edge of the sheet being suctioned and held is different from the phase of drum 2. It changes by an amount corresponding to the length of the first row of suction holes 11 and the fourth row of suction holes 14 in the circumferential direction of the drum. Therefore, in order to compensate for this, it is necessary to change the rotation start timing of the registration rollers that determine the sheet feeding position relative to the drum depending on the size of the sheet. In other words, in the case of the above-mentioned configuration, when printing a B5 or B4 size sheet, the rotation start timing of the registration roller is delayed by a predetermined timing compared to when printing an A4 or A3 size sheet. All you have to do is feed the sheet.
以上に於いては、本発明を特定の実施例につい
て詳細に説明したが、本発明はこれに限定される
ものではなく本発明の範囲内にて種々の実施例が
可能であることは当業者にとつて明らかであろ
う。 In the above, the present invention has been described in detail with reference to specific embodiments, but it will be understood by those skilled in the art that the present invention is not limited thereto and that various embodiments are possible within the scope of the present invention. It would be obvious to
第１図はシートをドラムに巻装固定する形式の
装置の一例として、インクジエツト記録方式を利
用した記録装置の一つの実施例を示す概略構成
図、第２図は本発明によるシート保持装置を備え
たドラムの一つの実施例を示す断面図、第３図は
そのドラムの一方の軸端領域を拡大して示す断面
図、第４図はドラムの外周面を展開して示す展開
図である。
１…ケーシング、２…ドラム、３…支持軸、４
…シート載置台、５…給紙装置、６…レジストロ
ーラ、７…インクジエツトヘツド、８…シート剥
しローラ、９…排紙ローラ、１０…排紙台、１１
〜１６…第一〜第六の列の吸引孔、２３〜２８…
負圧供給チユーブ。
FIG. 1 is a schematic configuration diagram showing one embodiment of a recording device using an inkjet recording method as an example of a device for winding and fixing a sheet around a drum, and FIG. FIG. 3 is an enlarged sectional view showing one shaft end region of the drum, and FIG. 4 is a developed view showing the outer peripheral surface of the drum. 1...Casing, 2...Drum, 3...Support shaft, 4
... Sheet loading table, 5... Paper feeding device, 6... Registration roller, 7... Ink jet head, 8... Sheet peeling roller, 9... Paper ejection roller, 10... Paper ejection table, 11
~16... Suction holes in the first to sixth rows, 23 to 28...
Negative pressure supply tube.
Claims (1)
イズのシートの先端部と後端部を吸引する複数個
の吸引孔が各々前記シートのサイズに応じて、そ
のドラム母線方向に沿つて複数列設けられてお
り、前記吸引孔は各々対応するシートの幅サイズ
に応じた範囲内に設けられており、且つシートの
先端部を吸引する吸引孔のうち同一幅サイズのシ
ートに対応するものは共通になつているが、幅サ
イズが異なつたシートに対応するものは互いにド
ラム周方向に異なつた位置に設けられていること
を特徴とするシート保持装置。1 A plurality of suction holes are provided on the circumferential surface of the drum for sucking the leading and trailing ends of sheets of various sizes wound around the drum, each having a plurality of suction holes along the generatrix direction of the drum, depending on the size of the sheet. The suction holes are provided in rows, and the suction holes are provided within a range according to the width size of the corresponding sheet, and among the suction holes that suck the leading edge of the sheet, those corresponding to sheets of the same width size are What is claimed is: 1. A sheet holding device that is common, but is characterized in that devices corresponding to sheets of different width sizes are provided at different positions in the circumferential direction of the drum.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP974880A JPS56107672A (en) | 1980-01-30 | 1980-01-30 | Sheet retaining device |
| US06/173,189 US4660825A (en) | 1979-07-26 | 1980-07-25 | Sheet clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP974880A JPS56107672A (en) | 1980-01-30 | 1980-01-30 | Sheet retaining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56107672A JPS56107672A (en) | 1981-08-26 |
| JPS6327911B2 true JPS6327911B2 (en) | 1988-06-06 |
Family
ID=11728918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP974880A Granted JPS56107672A (en) | 1979-07-26 | 1980-01-30 | Sheet retaining device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56107672A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992671A (en) * | 1982-11-18 | 1984-05-28 | Sanyo Electric Co Ltd | Form loading device of rotating drum |
| DE3376556D1 (en) * | 1982-11-24 | 1988-06-16 | Tektronix Inc | Paper handling apparatus for a copier |
| JPS6010968A (en) * | 1983-06-30 | 1985-01-21 | Matsushita Graphic Commun Syst Inc | Vaccum suction drum device |
| JP4943366B2 (en) * | 2008-03-31 | 2012-05-30 | 富士フイルム株式会社 | Conveying body and image forming apparatus |
-
1980
- 1980-01-30 JP JP974880A patent/JPS56107672A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56107672A (en) | 1981-08-26 |
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