EP0045887B1 - Justier-Zwischenscheibe als Unterbau für ein Instrument oder ein Werkzeug - Google Patents

Justier-Zwischenscheibe als Unterbau für ein Instrument oder ein Werkzeug Download PDF

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Publication number
EP0045887B1
EP0045887B1 EP19810105873 EP81105873A EP0045887B1 EP 0045887 B1 EP0045887 B1 EP 0045887B1 EP 19810105873 EP19810105873 EP 19810105873 EP 81105873 A EP81105873 A EP 81105873A EP 0045887 B1 EP0045887 B1 EP 0045887B1
Authority
EP
European Patent Office
Prior art keywords
adjustment
tool
washer
instrument
partial
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
Application number
EP19810105873
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0045887A2 (de
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/de
Publication of EP0045887A3 publication Critical patent/EP0045887A3/de
Application granted granted Critical
Publication of EP0045887B1 publication Critical patent/EP0045887B1/de
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 angularly adjusted with such adjusting washers, and they also prove useful for carrying tools such as grinding tools for high precision, for example for grinding polygon mirrors.
  • 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 must be precisely adjusted to a fraction of an arc second in order to avoid any unwanted jumping of the scanning 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 adjustment washer Due to its elasticity, especially the hub, the adjustment washer, which is built up in one piece from two partial 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 own bending stiffness of the adjusting washer which can be selected by material selection and dimensioning according to professional criteria, ensures a 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.
  • spheres 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 cup-shaped, that is to say: from the hub to an outer edge it has a not too rigid cup bottom wall.
  • the lower part disk can also have this shape, whereby the spring constant is reduced somewhat.
  • the instrument or tool-bearing disc can be designed purely disc-shaped with a constant thickness, but the thickness must then be selected to achieve the required range of spring force and sufficient strength that allows the distribution of the force applied by the expansion bodies.
  • 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.
  • the polygon mirror 1 consisting of a thick metal plate, lies somewhat obliquely due to even the smallest irregularities in the contact surfaces between this plate and the shaft plate 3, i.e. it has a wobble that leads to the points of light reflected from the various mirror surfaces jump in height. This wobble can only be avoided by extremely precise machining of the superimposed surfaces with the cleanest assembly.
  • 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 «refer to the drawing below, while the actual operating situation is completely open and depends on the requirements of the surrounding equipment.
  • 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 dividing disks 14 and 15, which is thus milled in the form of a cone segment into one of the mutually facing surfaces of the dividing disks 14 and 15.
  • the tracks 30 and 31 lie in the area of the relatively rigid disk edge 18 or 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 be used to read off the spread change that may have been carried out.
  • 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 the height of the reflected light point no longer changes with the vertical axis of rotation .
  • 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 washers.
  • 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 disk 15 ' is unchanged compared to FIG. 3, the upper part disk 14' is solid, however, overall somewhat thinner. This somewhat reduced thickness is necessary so that the adjusting intermediate disk does not finally 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 disc 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.
  • 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)
  • Mechanical Optical Scanning Systems (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Details Of Measuring And Other Instruments (AREA)
EP19810105873 1980-08-01 1981-07-24 Justier-Zwischenscheibe als Unterbau für ein Instrument oder ein Werkzeug Expired EP0045887B1 (de)

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 EP0045887A2 (de) 1982-02-17
EP0045887A3 EP0045887A3 (en) 1983-07-20
EP0045887B1 true EP0045887B1 (de) 1985-11-21

Family

ID=6108728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810105873 Expired EP0045887B1 (de) 1980-08-01 1981-07-24 Justier-Zwischenscheibe als Unterbau für ein Instrument oder ein Werkzeug

Country Status (4)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3121363C2 (de) * 1981-05-29 1983-11-10 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Antriebseinrichtung an einer Koordinatenmeßmaschine
CN109704073B (zh) * 2018-11-29 2021-03-12 颍上富元生产力促进中心有限公司 一种玻璃固定装置
CN113021223B (zh) * 2021-03-29 2022-03-01 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

Family Cites Families (6)

* 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
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
FR74990E (fr) * 1959-02-23 1961-03-03 Sfim Pivot sans frottement à rappel élastique, notamment applicable aux instruments de mesure
DE2161271C3 (de) * 1971-12-10 1980-03-13 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Vorrichtung zur Lageeinstellung
DE2248535C3 (de) * 1972-10-03 1978-04-20 Bjuro Vsajmosamenjajemosti V Metalloobrabatyvajuschei Promyschlennosti, Moskau Tisch zum Prufteilauflegen in Geraten zur Kontrolle linearer Größen
DE2717299C2 (de) * 1977-04-19 1982-11-25 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Aufnahme und zum Antrieb eines Polygonspiegels

Also Published As

Publication number Publication date
DE3029300A1 (de) 1982-02-18
JPS57141587A (en) 1982-09-01
DE3029300C2 (de) 1982-06-03
CA1161210A (en) 1984-01-31
EP0045887A2 (de) 1982-02-17
EP0045887A3 (en) 1983-07-20

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