JPH0688478B2 - Ellipse plotter - Google Patents
Ellipse plotterInfo
- Publication number
- JPH0688478B2 JPH0688478B2 JP24008589A JP24008589A JPH0688478B2 JP H0688478 B2 JPH0688478 B2 JP H0688478B2 JP 24008589 A JP24008589 A JP 24008589A JP 24008589 A JP24008589 A JP 24008589A JP H0688478 B2 JPH0688478 B2 JP H0688478B2
- Authority
- JP
- Japan
- Prior art keywords
- slider
- vertical
- horizontal
- lateral
- arm
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 (技術分野) 本発明は筆記具を具えた楕円を描くための作図用具に関
する(IPC:B43L)。TECHNICAL FIELD The present invention relates to a drawing tool for drawing an ellipse equipped with a writing tool (IPC: B43L).
(従来技術) 従来から楕円作図器に関して数多くの提案がなされてい
る。しかし、それらは以下の実用上の問題点があるため
広く普及するに至っていない。すなわち、作図すべき楕
円の寸法・形状に限界があり、また、操作性も良くな
く、さらに、特殊な形状や複雑な構造のため製作費が嵩
む割りに作図精度が良くない等の問題があった。(Prior Art) Many proposals have heretofore been made regarding ellipse plotters. However, they have not been widely spread because of the following practical problems. In other words, the size and shape of the ellipse to be drawn is limited, the operability is not good, and the special shape and complicated structure increase the manufacturing cost, but the drawing accuracy is not good. It was
(発明の目的) 本発明は上記従来例の欠点を解消した実用性に富む楕円
作図器を提案するものである。(Object of the Invention) The present invention proposes an elliptical plotter with high practicality, which solves the drawbacks of the conventional example.
(発明の構成) 本発明は、作図平面上又は作図平面下に置かれるフレー
ム又は製図盤等の固定基体1と、該基体によって横方向
に摺動自在に担持された横スライダー4と、該横スライ
ダーによって縦方向に摺動自在に担持された縦スライダ
ー3と、同じく該横スライダーによって縦方向に摺動自
在に担持され、且つ、筆記手段を具えた内分スライダー
6と、前記基体上に設定された回転中心Oを回転中心と
して駆動され、前記縦スライダーに枢着された先端Pま
での腕の長さが予め選択可能であるクランク腕2と、一
端Rが前記縦スライダー3に対して枢着され、他端Sが
回動自在且つ横方向摺動自在に前記横スライダー4に係
合された揺腕5とからなり、一端Rと他端Sとの間の任
意の位置で予め選択可能な内分点Tにおいて該揺腕と前
記内分スライダー6とが回動自在且つ横方向摺動自在に
係合したものであることを特徴とする。(Structure of the Invention) The present invention relates to a fixed base 1 such as a frame or a drawing board placed on a drawing plane or below the drawing plane, a horizontal slider 4 carried by the base so as to be slidable in the lateral direction, and A vertical slider 3 slidably carried by the slider in the vertical direction, an internal slider 6 slidably carried by the lateral slider in the vertical direction and equipped with writing means, and set on the base body. The crank arm 2 is driven with the rotation center O as a rotation center, and the length of the arm up to the tip P pivotally attached to the vertical slider is selectable in advance, and one end R is pivoted with respect to the vertical slider 3. And the other end S includes a rocking arm 5 that is rotatably and slidably moved in the lateral direction and is engaged with the lateral slider 4, and can be selected in advance at any position between one end R and the other end S. At the internal division point T, It is characterized in that it is engaged with the internal dividing slider 6 so as to be rotatable and laterally slidable.
すなわち、本発明の動作原理を説明するための第1図に
おいて、1は作図用紙を載置するべき製図盤又は作図用
紙上に置かれるフレーム(以下、単に製図盤という)
で、該製図盤1に対して横スライダー4が横(X)方向
に摺動自在に担持されている。3は該横スライダー4に
対して縦(Y)方向に摺動自在に担持された縦スライダ
ーで、また6は同じく該横スライダーに対して縦方向に
摺動自在に担持された内分スライダーであり、該縦スラ
イダーと内分スライダーとは該横スライダー上を後述す
る位置関係で平行して走行する。2は前記製図盤1上に
設定された定点Oを回転中心として回転駆動されるクラ
ンク腕で、その腕の長さrは描くべき楕円の長軸の2分
の1の長さに予め調節可能であり、その腕の先端Pは前
記縦スライダー3に対して枢着されている。従って、該
クランク腕2の回転に伴って、前記横スライダー4は該
製図盤に対して点Pが描く真円の軌跡の横方向成分に対
応する分だけ横方向に、また、該縦スライダー3は点P
が描く真円の軌跡の縦方向成分に対応する分だけ該横ス
ライダーに対して縦方向に平行移動する。5は一端Rが
該縦スライダー3に対して枢着され、他端Sが回動自在
且つ摺動自在に前記横スライダー4の横方向に延びた長
孔4bに係合された揺腕で、該一端Rと他端Sとの間の任
意の位置における内分点Tにおいて、前記内分スライダ
ー6の横方向に延在する長孔6aに対して回動自在且つ摺
動自在に係合している。したがって、前記クランク腕2
の回転に伴って、点Pが描く真円の軌跡の縦方向成分に
対応して平行移動する該縦スライダー3の移動量に対し
て、該内分スライダー6は線分SRに対する線分STの割
合、即ち、内分比kの割合で、該縦スライダーに追随し
て縦方向に平行移動する。したがって、内分スライダー
6上の点Q(X,Y)の軌跡は (X+X0)2/r2+(Y+Y0)2/(kr)2=1で表され
る。That is, in FIG. 1 for explaining the operation principle of the present invention, reference numeral 1 denotes a drawing board on which drawing paper should be placed or a frame placed on the drawing paper (hereinafter, simply referred to as drawing board).
The lateral slider 4 is slidably carried in the lateral (X) direction with respect to the drawing board 1. 3 is a vertical slider slidably carried in the vertical (Y) direction with respect to the lateral slider 4, and 6 is an internally dividing slider also slidably carried in the longitudinal direction with respect to the lateral slider. The vertical slider and the internal division slider run in parallel on the horizontal slider in a positional relationship described later. Reference numeral 2 is a crank arm that is rotationally driven about a fixed point O set on the drafting board 1, and the length r of the arm can be adjusted in advance to half the length of the major axis of the ellipse to be drawn. The tip P of the arm is pivotally attached to the vertical slider 3. Therefore, with the rotation of the crank arm 2, the horizontal slider 4 moves in the horizontal direction by an amount corresponding to the horizontal component of the trajectory of a perfect circle drawn by the point P with respect to the drawing board, and the vertical slider 3 Is point P
Moves in parallel to the horizontal slider in the vertical direction by an amount corresponding to the vertical component of the path of a perfect circle drawn by. Reference numeral 5 denotes a rocking arm whose one end R is pivotally attached to the vertical slider 3 and whose other end S is rotatably and slidably engaged with a long hole 4b extending in the lateral direction of the horizontal slider 4. At an internally dividing point T at an arbitrary position between the one end R and the other end S, it is rotatably and slidably engaged with a long hole 6a extending in the lateral direction of the internally dividing slider 6. ing. Therefore, the crank arm 2
With respect to the amount of movement of the vertical slider 3 that moves in parallel with the vertical component of the path of a perfect circle drawn by the point P, the internal slider 6 is The vertical slider is moved in parallel in the vertical direction at a rate of the internal division ratio k. Therefore, the locus of the point Q (X, Y) on the internal division slider 6 is represented by (X + X 0 ) 2 / r 2 + (Y + Y 0 ) 2 / (kr) 2 = 1.
(但し、前記長孔4bの延長線上にある楕円の中心を、点
O′(−X0,−Y0)で表すものとする。) すなわち、該内分スライダーの任意の位置に装着された
筆記手段は、横方向に該真円の直径と等しい長さの長軸
を持ち、縦方向に該直径に対して該内分比の割合て縮小
された短軸を持つ、楕円を描くことになる。(However, the center of the ellipse in an extension of the long hole 4b, the point O '(-. X 0, shall be represented by -Y 0)) That is, it mounted on an arbitrary position of the inner content slider The writing means draws an ellipse having a major axis of a length equal to the diameter of the perfect circle in the horizontal direction and a minor axis reduced in the ratio of the internal division ratio to the diameter in the longitudinal direction. Become.
(実施例) 第2ないし第4図に示す実施例において、1は作図平面
図上に設定されるべき前記定点Oに対応する中心軸2aを
そのフレームの略中央に回転自在に支承する軸受1aを具
えたフレームで、該フレームは、描くべき楕円の横軸及
び縦軸を示す基準線1c及び1dを指標として、該フレーム
の周縁部下面に貼着された滑り止めのためのゴム片(図
示せず)を介して、作図用紙上に置かれる。4は該フレ
ームに設けられた上下一対の案内レール1bによって横方
向に摺動自在に担持された横スライダーで、該横スライ
ダーは前述したP点に対応する後述する枢着軸2bが描く
真円の横方向成分に対応して横方向に摺動する。該横ス
ライダーは、その別々に設けられた各左右一対の案内レ
ール4aと4cとを具え、縦スライダー3と内分スライダー
6との2個のスライダーをそれぞれ縦方向に摺動自在に
担持する。そして、該案内レール4aに案内されて該縦ス
ライダーは後述するクランク腕の回転にともなって、前
記枢着軸2b(P)が描く真円の縦方向成分に対応して縦
方向に摺動する。2は前記フレーム1の軸受1aに回転自
在に支承された中心軸2a(O)に一端が固着され、他端
が前記枢着軸2b(P)に対して枢着されたクランク腕
で、該クランク腕の中心軸2aから枢着軸2bまでの、すな
わち、中心Oから先端Pまでの腕の長さrは、公知の手
段により描くべき楕円の長軸の2分の1の長さに合わせ
て予め選択可能とされている。5は前記点Rに対応する
枢着軸5aによって一端が前記縦スライダー3に対して枢
着され、前記点Sに対応する他端が前記横スライダー4
に設けられた長孔4bに対して回転自在且つ横方向摺動自
在に係合するローラ5bを介して接続された揺腕で、該揺
腕の運動の縦方向成分に関して、該揺腕の一端5a(R)
は前記縦スライダー3と共に移動し、一方、他端5b
(S)は横スライダー4と共に静止したまま動かない。
したがって、該揺腕上の一端から他端までの間の任意の
点は、該揺腕の運動の縦方向成分に関して、その内分比
に応じて移動する。なお、横スライダーの前記長孔4bは
その運動の横方向成分を逃がすためのもので、本実施例
において、これを前記縦スライダー3側に設けることも
できる。また、図示した実施例において、枢着軸2b
(P)と枢着軸5a(R)とを同軸にすることもできる。
5dは該揺腕に対して前記任意の内分位置において固定可
能に装着された移動片で、該移動片はこれに植立された
内分軸5c(T)を具え、これによって、前記内分スライ
ダー6の横方向の長孔6aと係合している。7は該内分ス
ライダーに対して設けられた筆記具装着手段で、該筆記
具装着手段は一側において筆記具7bを着脱自在に把持
し、他側において、上下(Z)方向に延びる角柱軸7aに
対して一体に結合されている。該角柱軸は該内分スライ
ダーの二股状の摺動案内6bに対して、軸(上下)方向に
摺動自在に担持され、該角柱軸の頂部には後述する連結
レバー8の一端が枢着されている。6cは前記二股状の摺
動案内6b部分において該角柱軸に貫挿された圧縮コイル
バネで、該内分スライダーと筆記具装着手段との間に作
用を及ぼし、通常、該筆記具装着手段を筆記具の先端が
紙面から離れたその上昇位置に保持している。8は該筆
記具装着手段7の角柱軸7aの頂部に一端が枢着され、こ
れと軸(上下)方向の運動に関して一体とされた連結レ
バーで、該連結レバーの他端には長孔8aが形成され、該
長孔には前記中心軸2aと一体の駆動レバー2cに植立され
た係合軸2dが該長孔の長手方向および該係合軸の軸(上
下)方向に回転および摺動自在に遊嵌されている。9は
該係合軸2dに回転自在かつ一定の範囲で軸(上下)方向
に摺動自在に結合された操作ノブで、該ノブは前記筆記
具装着手段の上昇位置の上限を定めている。なお、第3,
4図において、1eは描くべき楕円の寸法が小さく且つ多
数ある場合などに位置決めの補助手段として用いられる
スペーサーで、該スペーサーはその中央部分に雨滴型の
空洞部分を具え、また、その周縁部には前記基準線1c及
び1dの延長部となるべき横方向の基準線1c′及び縦方向
の複数の基準線1d′が刻設されており、前記フレーム1
側に設けられた案内溝に案内されて横方向に摺動可能で
あり、該縦方向の基準線1d′の内の一本がフレーム側の
基準線1dと一致した位置で固定される。すなわち、本実
施例においては、紙面上に作図上の補助線として、描く
べき楕円の縦軸と横軸とが予め記入されていることを前
提としており、紙面がフレームに比べて小さいなどして
該補助線がフレーム側の指標に達しない場合などに、該
フレームの指標を延長して、小さな楕円を所望の位置に
正しく描くために使用される。(Embodiment) In the embodiment shown in FIGS. 2 to 4, reference numeral 1 designates a bearing 1a which rotatably supports a central shaft 2a corresponding to the fixed point O to be set on the drawing plan view in substantially the center of the frame. The frame includes a rubber piece for non-slip adhered to the lower surface of the peripheral portion of the frame with reference lines 1c and 1d indicating the horizontal and vertical axes of the ellipse to be drawn as an index (Fig. (Not shown) on the drawing sheet. Reference numeral 4 denotes a lateral slider slidably carried in a lateral direction by a pair of upper and lower guide rails 1b provided on the frame. The lateral slider is a perfect circle drawn by a pivot shaft 2b described later corresponding to the point P described above. Sliding in the lateral direction corresponding to the lateral component of. The lateral slider includes a pair of left and right guide rails 4a and 4c, which are separately provided, and carries two sliders, a vertical slider 3 and an internal division slider 6, slidably in the vertical direction. Then, guided by the guide rail 4a, the vertical slider slides in the vertical direction corresponding to the vertical component of the perfect circle drawn by the pivot shaft 2b (P) as the crank arm described later rotates. . Reference numeral 2 denotes a crank arm having one end fixed to a central shaft 2a (O) rotatably supported by a bearing 1a of the frame 1 and the other end pivotally attached to the pivot shaft 2b (P). The length r of the arm from the central axis 2a of the crank arm to the pivot axis 2b, that is, from the center O to the tip P is adjusted to half the length of the major axis of the ellipse to be drawn by known means. It is possible to select in advance. One end of the reference numeral 5 is pivotally attached to the vertical slider 3 by a pivot shaft 5a corresponding to the point R, and the other end corresponding to the point S is the lateral slider 4.
A wobble arm connected via a roller 5b that engages with a long hole 4b provided in the rotatably and laterally slidably, one end of the wobble arm with respect to the longitudinal component of the motion of the wobble arm. 5a (R)
Moves with the vertical slider 3 while the other end 5b
(S) remains stationary with the horizontal slider 4 and does not move.
Therefore, an arbitrary point on the swing arm from one end to the other end moves in accordance with the internal division ratio with respect to the longitudinal component of the motion of the swing arm. The long hole 4b of the horizontal slider is for releasing the lateral component of the movement, and in the present embodiment, it can be provided on the vertical slider 3 side. In the illustrated embodiment, the pivot shaft 2b
(P) and the pivot shaft 5a (R) may be coaxial.
Reference numeral 5d denotes a moving piece fixedly attached to the swing arm at the arbitrary inner dividing position, and the moving piece has an inner dividing axis 5c (T) set on the moving piece, whereby The minute slider 6 is engaged with a lateral long hole 6a. Reference numeral 7 designates a writing instrument mounting means provided for the internal slider, the writing instrument mounting means detachably grips the writing instrument 7b on one side and a prism shaft 7a extending in the vertical (Z) direction on the other side. Are combined together. The prismatic shaft is slidably carried in the axial (vertical) direction with respect to the bifurcated sliding guide 6b of the internal division slider, and one end of a connecting lever 8 described later is pivotally attached to the top of the prismatic shaft. Has been done. Reference numeral 6c denotes a compression coil spring which is inserted through the prismatic shaft in the bifurcated sliding guide 6b portion and acts between the internal dividing slider and the writing instrument mounting means, and normally, the writing instrument mounting means is provided at the tip of the writing instrument. Holds it in its raised position, away from the page. Reference numeral 8 denotes a connecting lever, one end of which is pivotally attached to the top of the prismatic shaft 7a of the writing instrument mounting means 7 and which is integrated with this with respect to movement in the axial (vertical) direction. An engaging shaft 2d formed in the elongated hole and erected on a drive lever 2c integral with the central shaft 2a rotates and slides in the longitudinal direction of the elongated hole and in the axial (vertical) direction of the engaging shaft. It is freely fitted. Reference numeral 9 denotes an operation knob rotatably coupled to the engagement shaft 2d and slidably in a certain range in the axial (vertical) direction. The knob defines the upper limit of the rising position of the writing instrument mounting means. The third,
In Fig. 4, 1e is a spacer used as an auxiliary means for positioning when the size of the ellipse to be drawn is small and there are many, and the spacer is provided with a raindrop-shaped hollow portion at its central portion and also at its peripheral portion. Is provided with a horizontal reference line 1c 'and a plurality of vertical reference lines 1d' which should be extensions of the reference lines 1c and 1d.
It is slidable in the lateral direction by being guided by the guide groove provided on the side, and one of the vertical reference lines 1d 'is fixed at a position corresponding to the frame-side reference line 1d. That is, in the present embodiment, it is premised that the vertical axis and the horizontal axis of the ellipse to be drawn are entered in advance as auxiliary lines for drawing on the paper surface, and the paper surface is smaller than the frame. When the auxiliary line does not reach the index on the frame side, it is used to extend the index of the frame and draw a small ellipse correctly at a desired position.
したがって、前記クランク腕2を回転駆動するため、該
操作ノブ9を持ち、これを圧縮コイルバネ6cの力に抗し
て押し下げて、該筆記具の先端を作図紙面に接触させな
がら、中心軸2aを中心として駆動レバー2cを回転させる
と、中心軸2aを介してこれと一体のクランク腕2が回転
し、したがって、該クランク腕上の枢着軸2bが真円を描
いて該中心軸2aの周りを回転する。該枢着軸2bの運動は
前記横スライダー4の横方向の運動と縦スライダー3の
縦方向の相対的運動とに分解され、該縦方向の運動はさ
らに前記内分スライダー6の縮小された縦方向の運動に
変換され、該横方向の運動と縮小された縦方向の運動と
の組み合わせにより、該筆記具7bは縦方向において縮小
された楕円を紙面上に描くことになる。Therefore, in order to rotationally drive the crank arm 2, the operation knob 9 is held, and the operation knob 9 is pushed down against the force of the compression coil spring 6c to bring the tip of the writing instrument into contact with the surface of the drawing paper while centering the center axis 2a. When the drive lever 2c is rotated as, the crank arm 2 integral therewith is rotated via the central shaft 2a, and therefore the pivot shaft 2b on the crank arm forms a perfect circle around the central shaft 2a. Rotate. The movement of the pivot axis 2b is decomposed into the horizontal movement of the horizontal slider 4 and the relative movement of the vertical slider 3 in the vertical direction, and the vertical movement is further reduced by the reduced vertical movement of the internal slider 6. The writing instrument 7b draws an ellipse reduced in the vertical direction on the paper by converting the movement into the directional movement and combining the horizontal movement and the reduced vertical movement.
(発明の効果) 本発明は以上のように構成されているから、操作がし易
く、かつ任意の楕円を迅速かつ正確に描くことのできる
新規な楕円作図器を比較的安価に提供することができ
る。(Effects of the Invention) Since the present invention is configured as described above, it is possible to provide a novel ellipse plotter that is easy to operate and that can draw an arbitrary ellipse quickly and accurately at a relatively low cost. it can.
第1図は本発明に係る楕円作図器の原理を説明するため
の平面図で、また、第2図と第3図は本発明の実施例を
示す平面図であって、前者は作図中の後者は格納時の状
態を示す。第4図は第3図の実施例に対応する立面断面
図である。 1……製図盤、3……縦スライダー、 4……横スライダー、5……揺腕、 6……内分スライダー、7……筆記具装着手段。FIG. 1 is a plan view for explaining the principle of the ellipse plotter according to the present invention, and FIGS. 2 and 3 are plan views showing an embodiment of the present invention. The latter shows the state at the time of storage. FIG. 4 is an elevational sectional view corresponding to the embodiment of FIG. 1 ... Drafting board, 3 ... Vertical slider, 4 ... Horizontal slider, 5 ... Shaking arm, 6 ... Internal slider, 7 ... Writing instrument mounting means.
Claims (1)
ーム又は製図盤等の固定基体1と、 該基体によって横方向に摺動自在に担持された横スライ
ダー4と、 該横スライダーによって縦方向に摺動自在に担持された
縦スライダー3と、 同じく該横スライダーによって縦方向に摺動自在に担持
され、且つ、筆記手段を具えた内分スライダー6と、 前記基体上に設定された中心Oを回転中心として駆動さ
れ、前記縦スライダー3に枢着された先端Pまでの腕の
長さが予め選択可能であるクランク腕2と、 一端Rが前記縦スライダー3に対して枢着され、他端S
が回動自在且つ横方向摺動自在に前記横スライダー4に
係合された揺腕5とからなり、 該一端Rと他端Sとの間の任意の位置で予め選択可能な
内分点Tにおいて該揺腕と前記内分スライダー6とが回
動自在且つ横方向摺動自在に係合したものであることを
特徴とする 楕円作図器。1. A fixed base 1 such as a frame or a drawing board placed on a drawing plane or below the drawing plane, a horizontal slider 4 slidably carried in the lateral direction by the base, and a vertical direction by the horizontal slider. A vertical slider 3 slidably carried by the horizontal slider, an internal division slider 6 also slidably carried by the lateral slider in the vertical direction and provided with a writing means, and a center O set on the base body. A crank arm 2 which is driven with the center of rotation as the center of rotation and whose arm length up to the tip P pivotally attached to the vertical slider 3 can be selected in advance, and one end R is pivotally attached to the vertical slider 3, Edge S
Is a swing arm 5 which is engaged with the horizontal slider 4 so as to be rotatable and slidable in the lateral direction, and an internally dividing point T selectable in advance at an arbitrary position between the one end R and the other end S. The elliptic plotter is characterized in that the rocking arm and the internal dividing slider 6 are engaged with each other in a rotatable and laterally slidable manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24008589A JPH0688478B2 (en) | 1989-09-18 | 1989-09-18 | Ellipse plotter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24008589A JPH0688478B2 (en) | 1989-09-18 | 1989-09-18 | Ellipse plotter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03101999A JPH03101999A (en) | 1991-04-26 |
| JPH0688478B2 true JPH0688478B2 (en) | 1994-11-09 |
Family
ID=17054262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24008589A Expired - Lifetime JPH0688478B2 (en) | 1989-09-18 | 1989-09-18 | Ellipse plotter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0688478B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7010860B2 (en) | 1998-08-26 | 2006-03-14 | Alterra Holdings Corporation | Hand-held cutting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6158133A (en) * | 1998-12-23 | 2000-12-12 | Fiskars Inc. | Oval cutter |
-
1989
- 1989-09-18 JP JP24008589A patent/JPH0688478B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7010860B2 (en) | 1998-08-26 | 2006-03-14 | Alterra Holdings Corporation | Hand-held cutting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03101999A (en) | 1991-04-26 |
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