EP0875113A1 - Controlled asynchronous-motor drive designed for a rotating-drum scanner and with a hollow-shaft rotor for the internal illumination device - Google Patents
Controlled asynchronous-motor drive designed for a rotating-drum scanner and with a hollow-shaft rotor for the internal illumination deviceInfo
- Publication number
- EP0875113A1 EP0875113A1 EP96946179A EP96946179A EP0875113A1 EP 0875113 A1 EP0875113 A1 EP 0875113A1 EP 96946179 A EP96946179 A EP 96946179A EP 96946179 A EP96946179 A EP 96946179A EP 0875113 A1 EP0875113 A1 EP 0875113A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- scanning
- designed
- hollow
- drive
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
- H04N1/0671—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface with sub-scanning by translational movement of the main-scanning components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
- H04N1/0657—Scanning a transparent surface, e.g. reading a transparency original
Definitions
- a controlled asynchronous motor drive for a drum scanner the rotor of which is designed as a hollow shaft for arranging the interior lighting device.
- Drum scanners are used for scanning and data acquisition of image originals.
- these scanners require a rotation run which is kept as free as possible from trembling gear or other drive transmission influences.
- a compact design in the axial direction is sought, particularly in the case of scanners with a vertical axis direction.
- the present invention fulfills both tasks, in that, unlike drum scanners which have become known to date, the The transmission is dispensed with by means of a gear transmission or belt drive.
- the scanner axis is designed in the form of a hollow shaft directly as a rotor of a controlled asynchronous motor.
- the document illumination inside the scanning drum can advantageously be actuated by the hollow shaft, which is both
- Changing the scanning drum is easier, and also contributes to the compactness of the design.
- the tensioning device described in patent application 01/95 can advantageously be used as the connecting element between the drive device and the changing drum
- Figure 1 shows the principle of a drum scanner
- Figure 2 describes the drive type by cross-sectional representation
- Figure 1 demonstrates the principle of a drum scanner with a vertical drum axis.
- a scanning drum (1) clamped on one side is made of glass or glass-like plastic in order to be able to scan through transparent and transparent image material.
- the scanning drum is contained in a metal flange (2) and rests with it the motor flange (5), which forms a unit with the drive motor (6), the metal flange (2) and the motor flange (5) are coupled by three clamping devices, which are offset by 120 ° around the circumference and are housed in the motor flange.
- One of the clamping devices is through a circle (3) indicated During a scanning process, the drum (1) and rotates the lighting arm (7) and the scanning unit (8) move, rigidly coupled together, parallel to the drum axis in the direction of the drive motor (6). An image template mounted on the drum surface is broken down into scanning lines by the light beam (9). At the end of a scan, the lighting arm ( 7) immersed in the hollow axis of the motor flange (5) and drive motor (6)
- FIG. 2 shows the drive principle as a cross-sectional view.
- the driving asynchronous motor (6) consists of a stator housing (10) with a stator winding (11) and a hollow-axis rotor (5) with a rotor winding (12).
- the rotor is designed as a plate-like flange at the upper end
- This motor flange carries three clamping devices (3) which are offset by 120 ° and which, by means of their clamping levers (15), press the collar of the scanning drum flange (2) together with the motor flange.
- a detaching finger (14) of the moving mirror head can automatically detach it Operate the release lever (13) to loosen the clamping lever (15).
- the tensioning device (3) as an advantageous connection between the scanning drum and the motor flange is already known from the parallel patent application 19555750 6
- FIG. 2 also demonstrates the path of the light beam (9) of the drum interior lighting.
- the light beam (9) leads through the hollow axis of the drive via a deflection mirror (17) to the scanning device (8). It passes the glass scanning drum ( 1) that carries the sample
- FIG. 2 shows how direct drive without intermediate gear shifting and hollow axis construction contribute to the compact design
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Vertical rotating-drum scanners, with a fixed or replaceable drum fitted on one side, for scanning direct-view images or transparencies must not only ensure vibration-free rotation of the drum but must also have a very compact design. The invention meets both requirements by using a controlled, direct asynchronous drive which avoids jitter caused by transmission equipment such as gearing of any kind, the drive rotor being designed as a hollow shaft which is also the scanner-system axle. The hollow-shaft design enables the light for the internal illumination of the drum to be guided along the hollow shaft, thus saving space.
Description
Einen gesteuerten Asvnchronmotorantrieb für einen Trommelscanner, dessen Rotor als Hohlwelle zur Anordnung der Innenbeleuchtunqseinrich- tung ausgebildet ist.A controlled asynchronous motor drive for a drum scanner, the rotor of which is designed as a hollow shaft for arranging the interior lighting device.
Trommelscanner werden zur Abtastung und Datenerfassung von Bildvorlagen benutzt. Zum einen benotigen diese Scanner einen von verzitternden Getriebe¬ oder anderen Antriebsubersetzungseinflussen möglichst frei gehaltenen Rotationslauf Zum anderen wird besonders bei Scannern mit vertikaler Achsrichtung eine in Achsrichtung kompakte Bauform angestrebt Die vorliegende Erfindung erfüllt beide Aufgabenstellungen, indem, anders als bei bisher bekannt gewordenen Trommelscannern, beim Antrieb auf eine Übertragung durch Zahnradgetriebe oder Riementrieb verzichtet wird Dafür wird die Scannerachse in Form einer Hohlwelle direkt als Rotor eines gesteuerten Asynchronmotors ausgebildet Außerdem kann die Vorlagenbeleuchtung im Inneren der Abtast- trommel vorteilhaft durch die Hohlwelle betätigt werden, was sowohl einenDrum scanners are used for scanning and data acquisition of image originals. On the one hand, these scanners require a rotation run which is kept as free as possible from trembling gear or other drive transmission influences.On the other hand, a compact design in the axial direction is sought, particularly in the case of scanners with a vertical axis direction.The present invention fulfills both tasks, in that, unlike drum scanners which have become known to date, the The transmission is dispensed with by means of a gear transmission or belt drive. For this purpose, the scanner axis is designed in the form of a hollow shaft directly as a rotor of a controlled asynchronous motor. In addition, the document illumination inside the scanning drum can advantageously be actuated by the hollow shaft, which is both
Wechsel der Abtasttrommel erleichtert, als auch zusätzlich zur Kompaktheit der Bauform beitragt Als Verbindungselement zwischen Antriebseinrichtung und Wechseltrommel kann vorteilhaft die in der Patentanmeldung 01/95 beschriebene Spannvorrichtung eingesetzt werdenChanging the scanning drum is easier, and also contributes to the compactness of the design. The tensioning device described in patent application 01/95 can advantageously be used as the connecting element between the drive device and the changing drum
Im Folgenden wird die Neuerung an Hand der Figuren 1 und 2 naher erläutertThe innovation is explained in more detail below with reference to FIGS. 1 and 2
Figur 1 zeigt das Prinzip eines TrommelscannersFigure 1 shows the principle of a drum scanner
Figur 2 beschreibt die Antriebsart durch QuerschnittsdarstellungFigure 2 describes the drive type by cross-sectional representation
Figur 1 demonstriert das Prinzip eines Trommelscanners mit senkrechter Trommelachse Eine einseitig eingespannte Abtasttrommel (1 ) besteht aus Glas oder glasahnlichem Kunststoff, um neben Aufsichts- auch Transparentbildmateπal in Durchsicht abtasten zu können Die Abtasttrommel ist in einem Metallflansch (2) gefaßt und ruht mit diesem auf dem Motorflansch (5), der eine Einheit mit dem Antriebsmotor (6) bildet Metallflansch (2) und Motorflansch (5) sind durch drei, um 120 ° am Umfang versetzt angeordnete, Spannvorrichtungen gekoppelt, die im Motorflansch untergebracht sind Eine der Spannvorrichtungen ist durch einen Kreis (3) angedeutet Wahrend eines Abtastvorgangs rotiert die Trommel (1 ) und
bewegen sich Beleuchtungsarm (7) und Abtasteinheit (8), starr miteinander gekoppelt, parallel zur Trommelachse in Richtung Antriebsmotor (6) Dabei wird eine auf der Trommeloberflache montierte Bildvorlage durch den Lichtstrahl (9) in Abtastzeilen zerlegt Am Ende einer Abtastung ist der Beleuchtungsarm (7) in die Hohlachse von Motorflansch (5) und Antriebsmotor (6) eingetauchtFigure 1 demonstrates the principle of a drum scanner with a vertical drum axis. A scanning drum (1) clamped on one side is made of glass or glass-like plastic in order to be able to scan through transparent and transparent image material. The scanning drum is contained in a metal flange (2) and rests with it the motor flange (5), which forms a unit with the drive motor (6), the metal flange (2) and the motor flange (5) are coupled by three clamping devices, which are offset by 120 ° around the circumference and are housed in the motor flange. One of the clamping devices is through a circle (3) indicated During a scanning process, the drum (1) and rotates the lighting arm (7) and the scanning unit (8) move, rigidly coupled together, parallel to the drum axis in the direction of the drive motor (6). An image template mounted on the drum surface is broken down into scanning lines by the light beam (9). At the end of a scan, the lighting arm ( 7) immersed in the hollow axis of the motor flange (5) and drive motor (6)
Figur 2 laßt als Querschnittsdarstellung das Antriebsprinzip erkennen Der antreibende Asynchronmotor (6) besteht aus einem Statorgehause (10) mit einer Statorwicklung (11 ) und einem hohlachsigen Rotor (5) mit einer Rotorwicklung (12) Am oberen Ende ist der Rotor als tellerartiger Flansch ausgebildet Dieser Motorflansch tragt drei um 120° versetzte Spannvorrichtungen (3), die mit ihren Klemmhebeln (15) den Kragen des Abtasttrommelflansches (2) mit dem Motor¬ flansch zusammenpressen Am Ende eines Abtastvorganges kann ein Aus- losefinger (14) des herunterfahrenden Spiegelkopfes automatisch den Auslose- hebel (13) zur Losung des Klemmhebels (15) betätigen Die Spannvorrichtung (3) als vorteilhafte Verbindung von Abtastrommel und Motorflansch ist bereits aus der parallel laufenden Patentanmeldung 19555750 6Figure 2 shows the drive principle as a cross-sectional view. The driving asynchronous motor (6) consists of a stator housing (10) with a stator winding (11) and a hollow-axis rotor (5) with a rotor winding (12). The rotor is designed as a plate-like flange at the upper end This motor flange carries three clamping devices (3) which are offset by 120 ° and which, by means of their clamping levers (15), press the collar of the scanning drum flange (2) together with the motor flange. At the end of a scanning process, a detaching finger (14) of the moving mirror head can automatically detach it Operate the release lever (13) to loosen the clamping lever (15). The tensioning device (3) as an advantageous connection between the scanning drum and the motor flange is already known from the parallel patent application 19555750 6
Weiterhin demonstriert Figur 2 den Weg des Lichtstrahls (9) der Trommelinnen¬ beleuchtung Ausgehend von einer Lichtquelle (16) fuhrt der Lichtstrahl (9) durch die Hohlachse des Antriebes über einen Umlenkspiegel (17) zur Abtasteinnchtung (8) Dabei passiert er die Glasabtasttrommel (1 ), die die Abtastvorlage tragtFIG. 2 also demonstrates the path of the light beam (9) of the drum interior lighting. Starting from a light source (16), the light beam (9) leads through the hollow axis of the drive via a deflection mirror (17) to the scanning device (8). It passes the glass scanning drum ( 1) that carries the sample
Figur 2 vermittelt, wie Direktantrieb ohne Getriebezwischenschaltung und Hohl- achsenkonstruktion zur kompakten Bauform beitragen
FIG. 2 shows how direct drive without intermediate gear shifting and hollow axis construction contribute to the compact design
Claims
1 Trommelscannerantneb für einseitig eingespannte Abtasttrommeln, die der Abtastung von Aufsichts- oder Durchsichtsbildvorlagen dienen, zur Erzielung eines verzitterungsarmen Rotationsbetriebes und einer sehr kompakten1 drum scanner for single-sided scanning drums, which are used to scan top or transparency images, to achieve low-distortion rotation and very compact
Bauform dadurch gekennzeichnet, daß a) der Rotor (5) eines gesteuerten Asynchronmotors (6) unter Verzicht auf Verzitterungstoleranzen einbringende Übersetzungsgetriebe jeder Art direkt mit der Abtasttrommel verbunden ist, b) der Rotor (5) als Hohlwelle ausgebildet ist, durch die die Innenbeleuch- tungseinπchtung für die Abtasttrommel geführt werden kann, und c) der direkte Motorantrieb sowie das Hohlwellenprinzip eine besonders kompakte Bauform ermöglichenDesign characterized in that a) the rotor (5) of a controlled asynchronous motor (6), without sacrificing tremor tolerances, is directly connected to the scanning drum, b) the rotor (5) is designed as a hollow shaft through which the interior lighting tungseinπchtung can be performed for the scanning drum, and c) the direct motor drive and the hollow shaft principle enable a particularly compact design
2. Trommelscannerantneb nach Anspruch 1 dadurch gekennzeichnet, daß die Abtasttrommel fest mit dem Antriebsmotor verbunden ist, oder als Wechseltrommel ausgeführt ist2. Trommelscannerantneb according to claim 1, characterized in that the scanning drum is fixedly connected to the drive motor, or is designed as a replaceable drum
3 Trommelscannerantneb nach Anspruch 1 dadurch gekennzeichnet, daß der Antrieb für vertikale, oder für beliebige Lage der Scannerachse ausgeführt ist3 drum scannerantneb according to claim 1, characterized in that the drive is designed for vertical, or for any position of the scanner axis
4. Trommelscannerantneb nach Anspruch 1 dadurch gekennzeichnet, daß die Verbindung von Motor und Abtasttrommel gemäß Patentanmeldung Nr 19555750.6 ausgebildet ist 4. Trommelscannerantneb according to claim 1, characterized in that the connection of the motor and scanning drum is designed according to patent application No. 19555750.6
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996101524 DE19601524A1 (en) | 1996-01-17 | 1996-01-17 | A controlled asynchronous motor drive for a drum scanner, the rotor of which is aligned as a hollow shaft for arranging the interior lighting device |
DE19601524 | 1996-01-17 | ||
PCT/DE1996/002363 WO1997026755A1 (en) | 1996-01-17 | 1996-12-10 | Controlled asynchronous-motor drive designed for a rotating-drum scanner and with a hollow-shaft rotor for the internal illumination device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0875113A1 true EP0875113A1 (en) | 1998-11-04 |
Family
ID=7782979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96946179A Withdrawn EP0875113A1 (en) | 1996-01-17 | 1996-12-10 | Controlled asynchronous-motor drive designed for a rotating-drum scanner and with a hollow-shaft rotor for the internal illumination device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0875113A1 (en) |
JP (1) | JP2000505258A (en) |
DE (1) | DE19601524A1 (en) |
WO (1) | WO1997026755A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6661537B1 (en) | 1998-09-16 | 2003-12-09 | Hewlett-Packard Development Company, L.P. | Optical scanner with inclined platen |
US6791724B2 (en) | 2001-06-04 | 2004-09-14 | Hewlett-Packard Development Company, L.P. | Imaging device with media clamp |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3816659A (en) * | 1972-10-13 | 1974-06-11 | Perkin Elmer Corp | Scanning apparatus |
US3938191A (en) * | 1974-08-21 | 1976-02-10 | The Singer Company | Rotary data base with air bearing |
JPS58773A (en) * | 1981-06-25 | 1983-01-05 | Nec Corp | Integrated circuit inspecting device |
JPS60194869A (en) * | 1984-03-16 | 1985-10-03 | Dainippon Screen Mfg Co Ltd | Contact preventing device between original picture sylinder and scanning head in picture scanner |
DE8428330U1 (en) * | 1984-09-26 | 1986-03-13 | Siemens AG, 1000 Berlin und 8000 München | Device for converting the radiation image information carried by a storage layer into a television signal sequence |
US5515182A (en) * | 1992-08-31 | 1996-05-07 | Howtek, Inc. | Rotary scanner |
GB2280813B (en) * | 1993-08-06 | 1997-07-16 | Itek Colour Graphics Ltd | Rotary drum scanner |
-
1996
- 1996-01-17 DE DE1996101524 patent/DE19601524A1/en not_active Withdrawn
- 1996-12-10 WO PCT/DE1996/002363 patent/WO1997026755A1/en not_active Application Discontinuation
- 1996-12-10 EP EP96946179A patent/EP0875113A1/en not_active Withdrawn
- 1996-12-10 JP JP9525574A patent/JP2000505258A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9726755A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997026755A1 (en) | 1997-07-24 |
DE19601524A1 (en) | 1997-07-24 |
JP2000505258A (en) | 2000-04-25 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19980817 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE ES FR GB IT LI NL SE |
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17Q | First examination report despatched |
Effective date: 19991126 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20000407 |