EP0045887A2 - Rondelle réglable pour supporter un instrument ou un outil - Google Patents

Rondelle réglable pour supporter un instrument ou un outil Download PDF

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Publication number
EP0045887A2
EP0045887A2 EP81105873A EP81105873A EP0045887A2 EP 0045887 A2 EP0045887 A2 EP 0045887A2 EP 81105873 A EP81105873 A EP 81105873A EP 81105873 A EP81105873 A EP 81105873A EP 0045887 A2 EP0045887 A2 EP 0045887A2
Authority
EP
European Patent Office
Prior art keywords
tool
instrument
adjusting washer
shaft
adjusting
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
Application number
EP81105873A
Other languages
German (de)
English (en)
Other versions
EP0045887B1 (fr
EP0045887A3 (en
Inventor
Ernst Zieglmaier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0045887A2 publication Critical patent/EP0045887A2/fr
Publication of EP0045887A3 publication Critical patent/EP0045887A3/de
Application granted granted Critical
Publication of EP0045887B1 publication Critical patent/EP0045887B1/fr
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B9/00—Housing or supporting of instruments or other apparatus
    • G12B9/08—Supports; Devices for carrying
    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B5/00—Adjusting position or attitude, e.g. level, of instruments or other apparatus, or of parts thereof; Compensating for the effects of tilting or acceleration, e.g. for optical apparatus

Definitions

  • the invention relates to an adjusting washer according to the preamble of claim 1.
  • Such an adjusting washer is particularly useful for mounting and adjusting a polygon mirror or a polygon prism, for example in optical-mechanical scanning devices, such as those used in electronic printing devices.
  • Other instruments in particular optical instruments, can also be used.
  • such adjusting washers are adjusted in angle, and also for carrying tools such as grinding tools for high precision, for example for grinding polygon mirrors, they prove useful.
  • Polygon mirrors rotate on a driven, radially immovable axis, which is mounted with precision bearings, for example air bearings, and rotates at high speed.
  • the polygon mirror sits on a shaft plate representing the shaft end, which must be ground flat with high precision so that the polygon mirror does not wobble as it rotates.
  • the flatness of the polygon mirror has to be adjusted to a fraction of an arc second to avoid any unwanted jumping of the sampling point.
  • ground shaft plates are relatively expensive.
  • the invention has for its object to provide an adjustment washer for adjustment with the highest accuracy with the simplest means.
  • the backlash-free adjusting washer which is constructed in one piece from two dividing disks, can be adjusted with the help of the screw spindles until the instrument or tool, in particular a polygon mirror, practically no more wobbles when checking its beam deflection having.
  • the inherent bending stiffness of the adjusting washer which can be selected by material selection and dimensioning according to professional criteria, ensures sufficient restoring moment to ensure tight, play-free contact of the tracks on the expansion bodies ensure.
  • the restoring force acting on the expanding body which occurs when the corresponding partial disk sectors are spreading beyond the rest position, can be of such a magnitude that self-locking of the expanding body occurs.
  • the design achieved is very simple and compact and can be mounted for high-speed rotation without any impact.
  • the measure according to claim 2 ensures a uniform adjustment possibility on all sides.
  • balls are suitable as spreading bodies which run in grooves of decreasing depth, but in this case the milling of the grooves and the insertion of the balls may cause constructional difficulties due to the one-piece construction of the adjusting intermediate disk.
  • the measures according to claims 3 and 4 provide for easy-to-assemble wedge constructions, the realization of which must be considered in particular that the screw-in widths for the fine adjustment to be carried out are only very small.
  • the measure according to claim 3 enables easier resetting, ie displacement to the outside
  • the measure according to claim 4 enables the creation of more favorable friction conditions, since the expansion body itself does not have to be rotated relative to its tracks.
  • An expedient material pairing is specified in claim 6, while claim 5 specifies an aid for more targeted adjustment and for the reproducibility of an adjustment that has been made.
  • the upper part disc is relatively easy to bend, while the lower part plate is expediently rather stiffer.
  • claim 7 gives an instruction according to which at least the upper part disk is flat in cup shape, that is to say it has a not too rigid cup bottom wall from the hub to an outer edge.
  • the lower part disk can also have this shape, whereby the spring constant is reduced somewhat.
  • the upper part disk carrying the instrument or tool can also be made purely disk-shaped with a constant thickness, but the thickness must then be achieved in order to achieve the required spring force range and a sufficient strength that allows the distribution of the force applied by the expansion bodies to be selected.
  • the measures according to claim 8 indicate a suitable fastening option on the one hand on the shaft or on the shaft plate and on the other hand on the instrument or tool, the required play in the hub bore serving to allow the tube represented by the hub to bend.
  • a polygon mirror 1 which is intended for use in a light spot scanning device in electronically controlled printing, is to be mounted on a shaft 2 which rotates without impact and which ends in a shaft plate 3 at its upper end.
  • a screw bolt 4 is first used, which is screwed into a threaded bore 5 in the shaft 2 or is otherwise connected to it, together with a washer 6 and a screw nut 7.
  • the screw bolt 4 is surrounded by a screw sleeve 8 , which ends in a plate that can be placed on the shaft plate 3.
  • This adjusting washer 13 consists in an integral version of an upper part 14, a lower part 15 and a hub 16, the information "above” and “below” refer to the drawing, while the actual operating position is completely open and of the Requirements of the surrounding equipment depends.
  • the upper part disk 14 consists of a disk blade 17 adjoining the hub and an outer, annular disk rim 18 of greater axial extension and greater torsional rigidity.
  • the lower part disk 15 consists of a disk blade 19 and a thicker, annular disk rim 20, into which a small groove 21 for receiving the plate 9 is also screwed.
  • An axial bore 22 runs through the hub 16, the diameter of which is so much larger than the diameter of the screw sleeve 8 that a slight inclination or bending of the hub 16 is not hindered by the screw sleeve 8.
  • a practical embodiment of the adjusting intermediate disk made of duralumin has, for example, an overall diameter of the order of 73 mm, a diameter of the bore 22 of 24 mm, an outer diameter of the hub 16 of 32 mm and an inner diameter of the disk edges 18 and 20 of 57 mm.
  • the total height of the adjusting washer is 28 mm, that of the individual disk edges 18, 20 and the hub 16 is 10 mm and the space between the dividing disks 14 and 15 is 8 mm.
  • the entire adjusting intermediate disk is generally somewhat stretched in the axial direction, but it is also possible for the sector areas opposite the spreading sector areas to be compressed. Which of these phenomena occurs depends on the spreading mechanism chosen.
  • three screw spindles 26 are used for the spreading, which are arranged radially at uniform angular intervals of 120 with respect to the common axis of the polygon mirror 1, the shaft 2 and the adjusting intermediate disk 13.
  • Each screw spindle 26 is screwed into a continuous radial bore 27 in the hub 16 and has a screw head 28 which runs countersunk in a conical ring 29.
  • the screw spindle 26 rotates, the underside of the screw head 28 rubs against the conical ring 29 and, when the screw spindle 26 is screwed radially inward, presses it deeper into the space between the dividing disks 14 and 15.
  • a semi-conical path 30 or 31 is used to guide the conical ring 29 in the space between the partial disks 14 and 15, which is thus milled in the form of a cone segment into one of the facing surfaces of the partial disks 14 and 15.
  • the tracks 30 and 31 lie in the area of the relatively rigid disk edge 18 and 20, so that the expansion components of the conical rings 29 spaced apart by 120 overlap one another and the mutual inclination of the dividing disks 14 and 15 can be adjusted in any direction.
  • the screw head 28 has a mark 32 and the cone ring 29 has an annular scale 33. Since the cone ring 29 does not rotate between the tracks 30 and 31, the position of the mark 32 relative to the scale 33 can possibly be used read the spread change made.
  • the mark 32 can, for example, be an engagement slot for a screwdriver, but for greater precision it is designed more finely, while two holes 34 in the screw head 28 serve for attacking a turning tool.
  • a light point reflected by the polygon mirror at a distance of, for example, 8 m is observed in the different positions of the polygon mirror and is adjusted with the aid of the screw spindles 26 until - with a vertical axis of rotation - the height of the reflected light point no longer changes.
  • FIGS. 3 and 4 show adjustment washers, which differ from the adjustment washer used in the structures according to FIGS. 1 and 2 with regard to the construction of the dividing disks.
  • the upper partial disk 14 is unchanged, while the lower partial disk 15 'is not cup-shaped, but rather is solid up to the bore 22.
  • the change in shape for adjustment takes place mainly in the hub 16 and the upper disc 14.
  • the lower part disc 15 ' is unchanged from FIG. 3, the upper part disc 14' is solid, however, overall somewhat thinner. This somewhat reduced thickness is necessary so that the adjusting intermediate disk does not ultimately become excessively rigid or, in the event of major corrections, the hub 16, which ultimately absorbs the change in shape alone, is overloaded. Further modifications may be mentioned that, particularly in the case of relatively thin disk edges 18 and 20, there are more than three screw spindles.
  • the adjusting washer 13 can be screwed onto the shaft plate 3 by means of screws which run through screw holes 35.
  • cone rings 29 With regard to the cone rings 29, it should be noted that their cone slope is such that they resist self-locking in the force of the compression between the tracks 30 and 31 subject to adjustment forces.
  • the pitch over the entire length of 7 mm of the conical ring is 0.5 mm, which corresponds to approximately 2 °.
  • One revolution of the screw spindle 26 causes a spread of 0.036 mm, depending on the thread steepness, so that with a corresponding scale division spreading widths of 1 .mu.m can be set easily and reproducibly.
  • the elastic force applied by the adjusting washer itself is no longer so important for achieving the self-locking.
  • hardenable and non-hardenable metals, but also plastic, can be used as the material for the adjusting washer.
  • the adjusting washer according to the invention is not only extremely efficient, but also structurally very simple and therefore inexpensive to manufacture.

Landscapes

  • Bolts, Nuts, And Washers (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Mechanical Optical Scanning Systems (AREA)
EP19810105873 1980-08-01 1981-07-24 Rondelle réglable pour supporter un instrument ou un outil Expired EP0045887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803029300 DE3029300C2 (de) 1980-08-01 1980-08-01 Justier-Zwischenscheibe als Unterbau für ein Instrument oder ein Werkzeug
DE3029300 1980-08-01

Publications (3)

Publication Number Publication Date
EP0045887A2 true EP0045887A2 (fr) 1982-02-17
EP0045887A3 EP0045887A3 (en) 1983-07-20
EP0045887B1 EP0045887B1 (fr) 1985-11-21

Family

ID=6108728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810105873 Expired EP0045887B1 (fr) 1980-08-01 1981-07-24 Rondelle réglable pour supporter un instrument ou un outil

Country Status (4)

Country Link
EP (1) EP0045887B1 (fr)
JP (1) JPS57141587A (fr)
CA (1) CA1161210A (fr)
DE (1) DE3029300C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506991A1 (fr) * 1981-05-29 1982-12-03 Mauser Werke Oberndorf Dispositif de commande incorpore a une machine a mesurer les coordonnees
CN109704073A (zh) * 2018-11-29 2019-05-03 安徽思睿门窗有限公司 一种玻璃固定装置
CN113021223A (zh) * 2021-03-29 2021-06-25 中国工程物理研究院激光聚变研究中心 一种用于大口径平面反射镜的周圈少点夹持框及夹持方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873936A (en) * 1953-12-15 1959-02-17 Contraves A G Fa Supporting device
FR74990E (fr) * 1959-02-23 1961-03-03 Sfim Pivot sans frottement à rappel élastique, notamment applicable aux instruments de mesure
DE2248535A1 (de) * 1972-10-03 1974-04-11 Bjuro Wsajmosamenjajemosti W M Tisch zum pruefteilauflegen in geraeten zur kontrolle linearer groessen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1008966B (de) * 1954-07-20 1957-05-23 Kurt Konrad Loewenfeld Dipl In Vorrichtung zur Feineinstellung von Maschinenteilen, welche auf Gerad- oder Rundfuehrungen bewegt werden
DE2161271C3 (de) * 1971-12-10 1980-03-13 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Vorrichtung zur Lageeinstellung
DE2717299C2 (de) * 1977-04-19 1982-11-25 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Aufnahme und zum Antrieb eines Polygonspiegels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873936A (en) * 1953-12-15 1959-02-17 Contraves A G Fa Supporting device
FR74990E (fr) * 1959-02-23 1961-03-03 Sfim Pivot sans frottement à rappel élastique, notamment applicable aux instruments de mesure
DE2248535A1 (de) * 1972-10-03 1974-04-11 Bjuro Wsajmosamenjajemosti W M Tisch zum pruefteilauflegen in geraeten zur kontrolle linearer groessen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506991A1 (fr) * 1981-05-29 1982-12-03 Mauser Werke Oberndorf Dispositif de commande incorpore a une machine a mesurer les coordonnees
CN109704073A (zh) * 2018-11-29 2019-05-03 安徽思睿门窗有限公司 一种玻璃固定装置
CN113021223A (zh) * 2021-03-29 2021-06-25 中国工程物理研究院激光聚变研究中心 一种用于大口径平面反射镜的周圈少点夹持框及夹持方法

Also Published As

Publication number Publication date
EP0045887B1 (fr) 1985-11-21
JPS57141587A (en) 1982-09-01
CA1161210A (fr) 1984-01-31
DE3029300C2 (de) 1982-06-03
EP0045887A3 (en) 1983-07-20
DE3029300A1 (de) 1982-02-18

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