EP0196383A2 - Verfahren zum Schneiden oder Markieren einer Ellipse und Vorrichtung hierfür - Google Patents

Verfahren zum Schneiden oder Markieren einer Ellipse und Vorrichtung hierfür Download PDF

Info

Publication number
EP0196383A2
EP0196383A2 EP85306359A EP85306359A EP0196383A2 EP 0196383 A2 EP0196383 A2 EP 0196383A2 EP 85306359 A EP85306359 A EP 85306359A EP 85306359 A EP85306359 A EP 85306359A EP 0196383 A2 EP0196383 A2 EP 0196383A2
Authority
EP
European Patent Office
Prior art keywords
ellipse
shaft
circular
axis
gear wheel
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Withdrawn
Application number
EP85306359A
Other languages
English (en)
French (fr)
Other versions
EP0196383A3 (de
Inventor
Hiroaki Yasuda
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 EP0196383A2 publication Critical patent/EP0196383A2/de
Publication of EP0196383A3 publication Critical patent/EP0196383A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/10—Making cuts of other than simple rectilinear form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like

Definitions

  • the present invention relates to a method of cutting a plate material, such as a mat for picture frame, a thick sheet of paper, a plywood, a rubber plate, a synthetic resin plate or the like, simply into an ellipse of the desired angle and an apparatus therefor. It is also applicable to a compass for drawing an ellipse by the use of the same principle.
  • the locus drawn by the point P becomes an ellipse.
  • an elliptical cutter is manufactured in accordance with this principle, it is so made that there are provided two rods to form X-axis and Y-axis which are disposed to stride over the base on which an object to be cut, such as a picture frame mat, is placed and which are to be at right angles to each other and by controlling the range of sliding of a sliding member along these rods, the sliding member is allowed to make an elliptical movement and by pressing a cutter provided on the sliding member onto an object to be cut, cutting of the object into an elliptical profile is made.
  • a method of marking on or cutting in a surface an ellipse employing a marking or a cutting element comprising producing a relative movement between the element and the surface, said relative movement being constituted by the resultant of first and second circular movements, said first circular movement being centred on the circumference of the second circular movement, and the angular speed of the first circular movement being twice that of the second circular movement and in the opposite direction to the second circular movement.
  • apparatus for marking on or cutting in a surface an ellipse comprising a marking element or a cutting element, and means for producing a relative movement between the element and the surface, said relative movement being constituted by the resultant of first and second circular movements, said first circular movement being centred on the circumference of the second circular movement, and the angular speed of the first circular movement being twice that of the second circular movement and in the opposite direction to the second circular movement.
  • elliptical cutter of the present invention will hereinafter be described, based on the embodiments shown in Figs. 1 to 8.
  • a base 1 has a required size and a shape to be stabilized even when it is placed on a working table.
  • a bearing 2 for a turntable and bearings 3, 4 for a main shaft and a sub-shaft On said base there are provided a bearing 2 for a turntable and bearings 3, 4 for a main shaft and a sub-shaft.
  • the bearing 2 is used to support a turntable shaft 5 for smooth rotation.
  • a turntable 6 of a size suitable for placing and fixing a workpiece, such as a mat, is fixed and at the lower end of the shaft 5 a pulley 7 is provided.
  • the bearings 3 comprise a couple of two opposite pieces on the right and left sides. Each bearing 3 supports the main shaft 8 for smooth rotation.
  • a pulley 9 is fixed, and to the upper end thereof a horizontally projecting cirank arm 10 is provided integrally.
  • a dovetail groove 10a is formed in its longitudinal direction.
  • An extensinn piece is slidably accommodated in said dovetail groove 10a and the upper part of said piece 11 is loosely fitted in a hole 12a made in a sliding plate 12.
  • the lower part of the piece 11 is formed into a fitting piece lla of a shape to be fitted slidably in the dovetail groove 10a of the crank arm 10 and its upper part is made into an axial form, on the top of which a flange 11b is formed.
  • Said axial form and flange llb are accommodated into the hole 12a of the sliding plate 12, after which a presser plate 13 is fixed to the sliding plate 12 in a manner to press the top surface of the flange llb, whereby the piece 11 is made revolvable in relation to the sliding plate 12 but not extractable upward or downward.
  • the piece 11 has a hole 11c made vertically therethrough. At the lower part of the hole 11c, a female screw is threaded.
  • a screw rod 14 having a knob 14a at its top is thrusted into the hole 11c and screwed up. The free end of the screw rod 14 is protruded downward from the lower part of the piece 11 to have it oppose to the inner bottom surface of the dovetail groove 10a of the crank arm 10.
  • the main shafts 8 are provided two in opposed state in the base 1 and are similarly supported by the sliding plate 12. Also, a sub-shaft 15 is provided adjacent to the main shaft 8. The sub-shafts 15 are also two, which are provided on the opposite side to the turntable shaft 5 of the main shaft. Each of the sub-shafts is provided at its upper end with a sub-crank 16 and at its lower end with a pulley 17.
  • an extension piece 18 is inserted into the dovetail groove 16a provided in the sub-crank 16.
  • the upper part of the piece 18 is engaged with the sliding plate 12 and the piece 18 is also screw-stopped with a screw rod 19.
  • the crank arm 10 is provided with a scale a and by fixing the piece 18 according to the scale, the minor axis of the ellipse is determined.
  • the two crank arms 10 and the sub-cranks 16 are disposed in parallel state and are connected with the sliding plate 12 via the pieces 18. In determining the minor axis of the ellipse, it is necessary to set at least the scales of the two crank arms to the same position. Although there is no scale on the sub-cranks, after setting the scale of the crank arm, the screw rod of the sub-crank may be tightened.
  • the sliding plate 12 is provided with an arm 20 for determining the major axis of ellipse.
  • the arm 20 is provided in manner to overlie one end of the sliding plate 12. Either one or both of them is/are provided with a scale b.
  • the arm 20 is provided in its longitudinal direction with a slot 20a and on its lower surface with a protrusion 20b along the slot so as to prevent transverse deflection of the arm.
  • a groove 12b to accommodate the protrusion 20b is provided on the sliding plate 12.
  • a screw hole 12c is provided at the outer end part of the groove 12b .
  • a screw portion 21a of a fixing member 21 inserted into the slot 20a of the arm 20 is screwed in said screw hole 12c.
  • the cutter holder 22 accommodates and supports a presser 22b in a bearing 22a in rotatable and slidable manner and also accommodates and supports a shaft 22d in the presser 22b through the medium of a bearing 22c.
  • a cutter stem 23 is fitted to a cutter fitting piece 22e of a shaft 22d projected at the lower end of the holder 22.
  • a presser 23b is provided with a spring 22g between the bearing 22a and a flange 22f provided at the top surface of the presser so as to be forced upward at all times.
  • the cutter fitting piece 22e is provided with a transverse slot 22h, in which the cutter stem 23 is fixed.
  • the cutter stem 23 has a flange 23f at its center, with bolt sections 23b, 23c (each having a bolt-like male screw thread) projected to both ends thereof.
  • On the longitudinal side of one bolt 23b a cut groove 23d is provided.
  • a cutter 23a is inserted in the cut groove 23d and is securely held by a nut 23e screwed into the bolt section 23b and a flange 23f.
  • the other bolt 23c is inserted in the transverse slot 22h of the cutter fitting piece 22e and a nut 23g is screwed at the free end thereof.
  • the cutter fitting piece 22e is held between and fixed by the nut 23g and the flange 23f. Under this condition, by turning the bolt 23c, the angle of the cutter in relation to an object to be cut is made adjustable,from a right angle to an optional angle.
  • the outside of the bolt part 23c is ground into a plane shape and inserted in the slot 22h, whereby the angle can be simply determined.
  • the turntable 6 which is rotatably supported by the bearing 2 is provided with two fixing means 24 for keeping a workpiece accurately when loaded thereon.
  • the diameter of a pulley 7 provided at the lower end of the turntable shaft 5 is made larger than the diameter of pulleys 9, 17 which are provided at the lower ends of the main shaft 8 and the sub-shaft 15, the ratio thereof being 2:1, and a belt 25 is stretched around the pulleys 7, 9 and 17.
  • a sprocket wheel, a chain or a gear may be used.
  • a mat is placed on a turntable 6 and is fixed with a fixing means 24. Then, a choice is made whether to make the cut surface perpendicular or angled, depending on which the cutter 23 is fixed. In fixing the cutter shaft 23f to the cutter holding piece 22e, the angle of the cutter to the surface to be cut is adjusted and fixing is made. Next, the major axis and the minor axis of an ellipse are to be determined. In order to obtain the designed ellipse, firstly the major axis is adjusted by sliding the arm 20 provided on the sliding plate 12 after loosening the fixing member 21 to obtain the desired length according to the scale b and then the fixing means 21 is fastened again.
  • a radius R on the major axis side of the ellipse between the turntable axis and the cutter is determined.
  • the minor axis of the ellipse is determined.
  • the screw rod 14 provided on the extension piece 11 is loosened to shift the piece 1i and when the piece 11 is stopped at the specified position, the screw rod 14 is fastened again.
  • the screw rods 14, 19 which are four in total provided on the two crank arms and two sub-cranks respectively are to be set.
  • a minor axis side radius r of the ellipse is obtained.
  • the data may be held by inserting in the elliptical equation:
  • the angle and the size of the ellipse may be made optional.
  • the piece 11 is fixed onto the 0 point of the crank arm, i.e. at the center of the main shaft, a true circle having the arm length as a radius can be formed.
  • the apparatus may be used as an elliptic compass.
  • a main shaft 31 is supported revolvably.
  • the arm 30 is made to be supported on the paper at least at three different points. It is used in such a manner that the center of the main shaft 31 supported by the above arm 30 is set at the position which becomes the centre of the ellipse to be drawn.
  • a handle 32 and a first block 33 is fixed at the upper end and the lower end respectively of the main shaft 31. With the revolution of the handle 32, the first block 33 is revolved via the main shaft 31.
  • a first gear wheel 34 is mounted revolvably on the outer circumference of the main shaft 31 and by a screw 35 provided protrudingly from the arm 30, the first gear wheel 34 is fixed at the desired angle.
  • a crank arm 36 is fitted slidably to the first block 33 by the main shaft 31.
  • a link 37 is fixed to a free end of the crank arm 36 by a second gear wheel shaft.
  • the second gear wheel 38 is provided at the upper end of the second gear wheel shaft in a manner to engage with the first gear wheel 34.
  • a second block 40 is fixed to the free end of the ,link 37 via a shaft 39, to the upper end 6f which a third gear wheel 41 is fixed.
  • the third gear wheel 41 engages with the second gear wheel 38.
  • a diameter ratio between the first gear wheel 34 and the third gear wheel 41 is set at 2 : 1 but the diameter of the second gear wheel may be determined properly.
  • the second block 40 and the first block 33 are so arranged that both oppose each other at all times, irrespective of the shifting of the-crank arm and the link.
  • a major axis scale rod 42 and a screw rod 43 are mounted between the first block 33 and the second block 40.
  • the major axis scale rod 42 is graduated and is fixed at its base end side to the first block 32 but is put in the second block 40 slidably.
  • the screw rod 43 is threaded in the first block 33 but is passed through revolvably the second block.
  • the screw rod 43 is supported by a set ring 43a.
  • a knob 44 is fixed at the free end of the screw rod 43 and by revolving the knob 44, the screw rod 43 revolves and thus the distance between the first block and the second block varies. At this time, the crank arm and the link are shifted but gears 34, 38, 41 maintain the engagement with each other.
  • a hanging rod 45 projects from a shaft 39 which projects under the second block 40.
  • the hanging rod 45 is provided with a protractor 46 and a pointer 47 fixed to the second block 40 indicates the angle of the protractor or the angle of an ellipse to be drawn.
  • the screw 35 is loosened, the first gear wheel 34 is revolved and adjustment is made so that the pointer 47 may indicate the specified angle of the protractor 46 at the 0 position, after which the screw 35 is tightened.
  • a support rod 48 with a minor axis scale is provided horizontally, namely, in parallel with the major axis scale rod 42, the screw rod 43,.the crank arm and the link.
  • a slider 49 is supported slidably on this support rod 48 and is fixed by a setscrew 50 at the setting scale position.
  • the slider 49 is fitted with a writing tool 51, a lower end of which makes contact with a sheet of paper at a proper pressure by its own weight.
  • the angle of 0.0. on the X-axis with the acute angle side of the X-axis to be ⁇ when a straight line connecting the point O° on the circumference of the circle having the radius R and the point P on the circumference of the circle having the radius r reversely rotates while keeping the same angle to the X-axis, the locus of the point P forms an ellipse.
  • the line to be drawn by this method becomes an ellipse.
  • the major axis of an ellipse to be drawn may be set to the prescribed scale by moving the second block 40 by revolving the knob of the screw rod.
  • the slider 49 is slid along the support rod 48 to set to the prescribed scale.
  • the system is constituted by the combination of the circular movements of the three gear wheels and the crank arm and the link which move, centering on the main shaft which supports these gear wheels. Accordingly, by a simple mechanism and a simple operation, accurate ellipse can be drawn.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Cutting Processes (AREA)
  • Treatment Of Fiber Materials (AREA)
EP85306359A 1985-03-28 1985-09-06 Verfahren zum Schneiden oder Markieren einer Ellipse und Vorrichtung hierfür Withdrawn EP0196383A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP64274/85 1985-03-28
JP6427485A JPS61226297A (ja) 1985-03-28 1985-03-28 だ円の切断方法及びその装置

Publications (2)

Publication Number Publication Date
EP0196383A2 true EP0196383A2 (de) 1986-10-08
EP0196383A3 EP0196383A3 (de) 1987-01-28

Family

ID=13253473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85306359A Withdrawn EP0196383A3 (de) 1985-03-28 1985-09-06 Verfahren zum Schneiden oder Markieren einer Ellipse und Vorrichtung hierfür

Country Status (2)

Country Link
EP (1) EP0196383A3 (de)
JP (1) JPS61226297A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009720A1 (en) * 1993-10-06 1995-04-13 Vilho Jokela Apparatus for cutting sheet-like material, such as gasketing material
EP0666151A1 (de) * 1994-02-04 1995-08-09 Frank William Weston Schneidvorrichtung
US5861077A (en) * 1994-12-21 1999-01-19 Seiko Epson Corporation Separation method for adhesive sheet and its device
US5937725A (en) * 1994-12-27 1999-08-17 Seiko Epson Corporation Laminated sheet cutting method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6052909A (en) 1998-08-26 2000-04-25 Gardner; Mark T. Hand-held oval cutting device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190418058A (en) * 1904-08-20 1905-06-22 Henry William James Improved Means or Appliances for Cutting-out Elliptical and Circular Forms from Paper, Cardboard, Glass, Tin-plate and other Sheet Material
CH71698A (de) * 1915-11-11 1916-02-01 Hugo Schmidt Vorrichtung zum Ausschneiden von Ovalen aus Karton etc.
CH74343A (de) * 1916-11-08 1917-06-01 Hugo Schmidt Vorrichtung zum Schneiden von Ovalen und Kreisen
CH241919A (de) * 1945-07-14 1946-04-15 Meier Arnold Ellipsenzirkel.
CH247733A (de) * 1945-10-02 1947-03-31 Krayenbuehl Silvio Ellipsenzirkel.
DE1761011A1 (de) * 1968-03-21 1970-03-26 Willi Erhardt Ellipsenzirkel
DE2348990A1 (de) * 1972-09-29 1974-04-04 Okada Vorrichtung zum zeichnen einer ellipse
US3854213A (en) * 1974-02-12 1974-12-17 R Armitt Ellipse drawing compass
US4226022A (en) * 1979-07-17 1980-10-07 Chen Jen Sheng Ellipsograph

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190418058A (en) * 1904-08-20 1905-06-22 Henry William James Improved Means or Appliances for Cutting-out Elliptical and Circular Forms from Paper, Cardboard, Glass, Tin-plate and other Sheet Material
CH71698A (de) * 1915-11-11 1916-02-01 Hugo Schmidt Vorrichtung zum Ausschneiden von Ovalen aus Karton etc.
CH74343A (de) * 1916-11-08 1917-06-01 Hugo Schmidt Vorrichtung zum Schneiden von Ovalen und Kreisen
CH241919A (de) * 1945-07-14 1946-04-15 Meier Arnold Ellipsenzirkel.
CH247733A (de) * 1945-10-02 1947-03-31 Krayenbuehl Silvio Ellipsenzirkel.
DE1761011A1 (de) * 1968-03-21 1970-03-26 Willi Erhardt Ellipsenzirkel
DE2348990A1 (de) * 1972-09-29 1974-04-04 Okada Vorrichtung zum zeichnen einer ellipse
US3854213A (en) * 1974-02-12 1974-12-17 R Armitt Ellipse drawing compass
US4226022A (en) * 1979-07-17 1980-10-07 Chen Jen Sheng Ellipsograph

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009720A1 (en) * 1993-10-06 1995-04-13 Vilho Jokela Apparatus for cutting sheet-like material, such as gasketing material
EP0666151A1 (de) * 1994-02-04 1995-08-09 Frank William Weston Schneidvorrichtung
US5904084A (en) * 1994-02-04 1999-05-18 Weston; Frank William Cutting apparatus
US5861077A (en) * 1994-12-21 1999-01-19 Seiko Epson Corporation Separation method for adhesive sheet and its device
US5937725A (en) * 1994-12-27 1999-08-17 Seiko Epson Corporation Laminated sheet cutting method

Also Published As

Publication number Publication date
JPS61226297A (ja) 1986-10-08
EP0196383A3 (de) 1987-01-28

Similar Documents

Publication Publication Date Title
US4679330A (en) Concentricity gauge
US4798112A (en) Head assembly for mat cutting machine
US4516328A (en) Shaft alignment device
EP0298129A1 (de) Vorrichtung und verfahren zur behandlung des randes eines brillenglases
US5690012A (en) Cutting module for web products and cutting device equipped with at least one such module
US5885143A (en) Disk texturing apparatus
US3995521A (en) Apparatus for cutting arcs of circles with band saws and the like
EP0196383A2 (de) Verfahren zum Schneiden oder Markieren einer Ellipse und Vorrichtung hierfür
US3800422A (en) Layout apparatus having improved angular adjustment means
US3851563A (en) Machine tool
WO1992005405A1 (en) Angular alignment assembly
US4999921A (en) Adjustable spirit level
US3545089A (en) Device for measuring angular deviation of portions of a workpiece
US3826007A (en) Drawing apparatus for perspective views
US5014584A (en) Machine and method for cutting oval shapes
US3874086A (en) Layout device
US2399610A (en) Printer's line-up table
GB2182786A (en) Microtome having specimen holder movable in two directions
US5099727A (en) Mechanism and method for circumscribing oval shapes
US3638324A (en) Gage
US2563000A (en) Lead measuring machine
US3820245A (en) Drawing projector for reproducing curves
US2595417A (en) Ellipsograph with guide
US5643049A (en) Floating contact gage for measuring cylindrical workpieces exiting a grinder
US2413376A (en) Drafting machine

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

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

18D Application deemed to be withdrawn

Effective date: 19870929