JPH0114466Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は互いに直交して組合わされた縦レール
と横レールとにより直スケールの平行度を製図板
上の任意の点において維持する製図機において、
直スケールが取付けられ、かつ、この直スケール
を平行又は回転操作する製図ヘツドを直スケール
とともに製図板から浮上した位置で、かつ、静止
状態で支持する製図ヘツドの浮上支持装置に関す
る。[Detailed description of the invention] The present invention provides a drawing machine that maintains the parallelism of a vertical scale at any point on a drawing board by vertical rails and horizontal rails that are combined orthogonally to each other.
This invention relates to a floating support device for a drafting head which supports a drafting head to which a straight scale is attached and which operates the straight scale in parallel or rotation at a position floating above the drafting board together with the straight scale and in a stationary state.

一般に、製図機を利用しての製図板上の製図作
業においては、製図板に止着された製図用紙を張
り替え若しくは移動するとき、又は製図ヘツドの
紙面接板及び直スケールが製図用紙上を滑走する
ときに製図用紙を汚損しないために上記製図ヘツ
ドを直スケールとともに製図板から浮上した位置
で支持することが望ましい。更に浮上した位置か
ら元の位置に製図ヘツド及び直スケールを戻す場
合には浮上支持の解除操作が簡単に行われうるこ
とが望ましい。 Generally, when drawing on a drawing board using a drawing machine, when repapering or moving the drawing paper fixed to the drawing board, or when the paper face plate and vertical scale of the drawing head slide on the drawing paper. In order to avoid staining the drawing paper during the drawing process, it is desirable to support the drawing head together with the straight scale at a position floating above the drawing board. Furthermore, when returning the drafting head and vertical scale from the floating position to their original positions, it is desirable that the floating support can be easily released.

本考案の目的は必要時に製図ヘツド及び直スケ
ールを製図板から浮上した状態で支持し、かつ、
簡単な操作でこの浮上支持を解除しうる製図ヘツ
ドの浮上支持装置を提供することである。この目
的を達成するための本考案は、縦キヤリツジから
製図ヘツドの方へ突設された連結用ブラケツト
と、製図板を滑走する製図ヘツドの移動に対して
この製図ヘツドと一体的に結合され、かつ、製図
ヘツドを製図板に密着するように枢支する回動ヒ
ンジ部材との間に枢軸を介して開閉ヒンジ部材を
連結し、この開閉ヒンジ部材と回動ヒンジ部材と
の間に製図ヘツドの重量に起因する回転モーメン
トに抗するロツク手段を設ける一方、上記連結用
ブラケツトに製図ヘツド支持用の可動支持台を製
図ヘツド支持位置と上記ロツク手段解除位置間を
移動可能に弾持させ、製図ヘツドを製図板から浮
上させることにより回動ヒンジ部材の縦キヤリツ
ジ側を載置し製図ヘツドを浮上支持するようにし
たことを特徴とする。 The purpose of this invention is to support the drafting head and vertical scale in a state floating above the drafting board when necessary, and
It is an object of the present invention to provide a floating support device for a drafting head that can release the floating support with a simple operation. To achieve this object, the present invention comprises a connecting bracket projecting from the vertical carriage towards the drafting head, which is integrally connected to the drafting head for movement of the drafting head as it slides on the drafting board; In addition, an opening/closing hinge member is connected via a pivot between a rotating hinge member that pivotally supports the drafting head in close contact with the drawing board, and the opening/closing hinge member is connected between the opening/closing hinge member and the rotating hinge member. A locking means for resisting rotational moment due to weight is provided, and a movable support base for supporting the drafting head is elastically supported by the connecting bracket so as to be movable between the drafting head support position and the locking means release position. The invention is characterized in that the vertical carriage side of the rotary hinge member is placed by floating the drawing head from the drawing board, and the drawing head is floated and supported.

以下、本考案の好適な実施例を第１図ないし第
５図に基づいて詳細に説明する。第１図におい
て、本考案に係る製図ヘツドの浮上支持装置１に
より支持されるべき製図ヘツド２にはスケール取
付板３を介して直スケール４が取付けられてい
る。製図ヘツド２の上端部位にはノブ５が設けら
れている。このノブ５は、製図ヘツド２の移動軸
６の内部にある回動主軸７及びスケール取付板３
と一体となつて回動する。移動軸６は軸回転不能
であつて、移動軸６を取巻く製図ヘツド用ホルダ
８を一体形成した回動ヒンジ部材９に２本のピボ
ツト軸１０により微小揺動自在に支持され、製図
板上の任意の点に移動可能である。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5. In FIG. 1, a vertical scale 4 is attached via a scale mounting plate 3 to a drafting head 2 to be supported by a drafting head floating support device 1 according to the present invention. A knob 5 is provided at the upper end of the drafting head 2. This knob 5 is connected to a rotating main shaft 7 located inside the moving shaft 6 of the drafting head 2 and a scale mounting plate 3.
It rotates as one. The moving shaft 6 is non-rotatable, and is supported by two pivot shafts 10 to be able to swing slightly on a rotational hinge member 9 which is integrally formed with a drafting head holder 8 that surrounds the moving shaft 6. Can be moved to any point.

回動ヒンジ部材９はその縦キヤリツジ側９ａ
（第１図中、回動ヒンジ部材９の左端部）におい
て、開閉ヒンジ部材１１の製図ヘツド側１１ａに
枢軸１２により枢動自在に連結されている。開閉
ヒンジ部材１１は縦キヤリツジ側１１ｂにおいて
縦キヤリツジ１３の台座１３ａから突出した連結
用ブラケツト１４に枢軸１５により枢動自在に連
結されている。 The pivoting hinge member 9 is on its vertical carriage side 9a.
It is pivotally connected to the drafting head side 11a of the opening/closing hinge member 11 by a pivot shaft 12 (at the left end of the rotating hinge member 9 in FIG. 1). The opening/closing hinge member 11 is pivotally connected by a pivot shaft 15 to a connecting bracket 14 protruding from a base 13a of the vertical carriage 13 on the vertical carriage side 11b.

上記回動ヒンジ部材９は製図ヘツド２及び直ス
ケール４を製図板に密着させたり、又は製図ヘツ
ド２及び直スケール４を製図板から浮上させたり
する場合に、開閉ヒンジ部材１１に対して微小の
枢動をなすためのものである。 The pivoting hinge member 9 has a minute position relative to the opening/closing hinge member 11 when the drawing head 2 and the vertical scale 4 are brought into close contact with the drawing board, or when the drawing head 2 and the vertical scale 4 are floated from the drawing board. It is for pivoting.

上記開閉ヒンジ部材１１は製図ヘツド２及び直
スケール４を製図板に対して倒立させたり（第１
図中、製図ヘツド２を反時計方向に旋回動する）、
又は元の状態に戻す（第１図中、製図ヘツド２を
時計方向に旋回動する）場合に連結用ブラケツト
１４に対して大きく枢動操作をなすためのもので
ある。 The opening/closing hinge member 11 is used to hold the drawing head 2 and the vertical scale 4 upside down with respect to the drawing board (first
In the figure, the drafting head 2 is rotated counterclockwise),
Or, it is used to perform a large pivoting operation with respect to the connecting bracket 14 when returning to the original state (swiveling the drafting head 2 clockwise in FIG. 1).

連結用ブラケツト１４から、製図ヘツド２の方
へ固定支持台１６が突出している。この固定支持
台１６は直方体状に形成され、かつ、連結用ブラ
ケツト１４の一部を成している。この固定支持台
１６にはその長手方向に２本の圧縮コイルバネ収
容孔１７ａ及び１７ｂが貫通して穿孔されてい
る。これらの２本の圧縮コイルバネ収容孔１７ａ
及び１７ｂに対して直交する長孔１８が固定支持
台１６に穿孔されている。この長孔１８の断面は
固定支持台１６の長手方向（第１図中、左右方
向）に長い長孔である。長孔１８にピン１９が遊
嵌されている。 A fixed support 16 projects from the connecting bracket 14 towards the drafting head 2. This fixed support base 16 is formed in the shape of a rectangular parallelepiped, and constitutes a part of the connection bracket 14. Two compression coil spring housing holes 17a and 17b are bored through the fixed support base 16 in its longitudinal direction. These two compression coil spring housing holes 17a
A long hole 18 perpendicular to the holes 17b and 17b is bored in the fixed support base 16. The cross section of this long hole 18 is a long hole that is long in the longitudinal direction of the fixed support base 16 (in the left-right direction in FIG. 1). A pin 19 is loosely fitted into the elongated hole 18.

上記圧縮コイルバネ収容孔１７ａ及び１７ｂの
それぞれの両側開口端２０ａ及び２０ｂには雌ネ
ジが形成され、これらの開口端２０ａ及び２０ｂ
には押しネジ２１ａ及び２１ｂが螺着されてい
る。第２図に示すように、これらの押しネジ２１
ａ及び２１ｂの端面には回動操作用の六角溝２２
が形成されている。圧縮コイルバネ収容孔１７ａ
及び１７ｂ内には圧縮コイルバネ２３が収容され
ており、この圧縮コイルバネ２３はピン１９を製
図ヘツド２の向きに常時付勢している。圧縮コイ
ルバネ２３は直スケール４を取付けた製図ヘツド
２の重量に対して均衡するだけの強さを発揮す
る。圧縮コイルバネ２３のバネ力は押しネジ２１
ａ及び２１ｂの埋込み量によつて調整される。 Female threads are formed at both open ends 20a and 20b of the compression coil spring housing holes 17a and 17b, respectively, and these open ends 20a and 20b
Push screws 21a and 21b are screwed into the holes. As shown in FIG.
Hexagonal grooves 22 for rotation operation are provided on the end faces of a and 21b.
is formed. Compression coil spring housing hole 17a
A compression coil spring 23 is accommodated in the pin 17b and 17b, and this compression coil spring 23 always biases the pin 19 in the direction of the drafting head 2. The compression coil spring 23 exerts enough strength to balance the weight of the drafting head 2 to which the vertical scale 4 is attached. The spring force of the compression coil spring 23 is the force of the push screw 21.
It is adjusted by the amount of embedding of a and 21b.

第３図に示すように、固定支持台１６の下面側
から上向きに４個のネジ孔２４ａ及び２４ｂが穿
孔されている。固定支持台１６において製図ヘツ
ド２に近い側の２個のネジ孔２４ａには押しネジ
２１ａの緩み止め用として止めネジ２５が螺着さ
れ、縦キヤリツジ１３に近い側の２個のネジ孔２
４ｂには姿勢修復用板バネ２６を固定するための
拡径ヘツド付固定ネジ２７が螺着されている。 As shown in FIG. 3, four screw holes 24a and 24b are bored upward from the lower surface side of the fixed support base 16. Set screws 25 are screwed into the two screw holes 24a on the side closer to the drafting head 2 of the fixed support base 16 to prevent the set screws 21a from loosening, and the two screw holes 24a on the side closer to the vertical carriage 13 are screwed.
A fixing screw 27 with an enlarged diameter head for fixing the posture restoring plate spring 26 is screwed onto the fixing screw 4b.

上記姿勢修復用板バネ２６は、固定支持台１６
に対して長手方向に移動自在となるように組付け
られ、かつ、回動した可動支持台２８を元の姿勢
に戻すためのバネである。 The above-mentioned posture repair plate spring 26 is attached to the fixed support base 16.
This is a spring that is assembled so as to be freely movable in the longitudinal direction relative to the support base 28, and is used to return the rotated movable support base 28 to its original position.

可動支持台２８の詳細が第４図に斜視図として
示されている。この可動支持台２８は、回動ヒン
ジ部材９の縦キヤリツジ９ａ側を載置する水平支
持板部２９とこの水平支持板部２９の両側から下
向きに延びたピン支持用側板部３０とを有してい
る。水平支持板部２９の先端部位（第１図中、水
平支持板部２９の右端部位）にはテーパ面３１が
形成されている。このテーパ面３１の部分は固定
支持台１６に支持されず、固定支持台１６から製
図ヘツド２の方へ突出している。 Details of the movable support 28 are shown in perspective view in FIG. This movable support stand 28 has a horizontal support plate portion 29 on which the vertical carriage 9a side of the rotary hinge member 9 is placed, and side plate portions 30 for supporting pins extending downward from both sides of the horizontal support plate portion 29. ing. A tapered surface 31 is formed at the distal end portion of the horizontal support plate portion 29 (the right end portion of the horizontal support plate portion 29 in FIG. 1). This portion of the tapered surface 31 is not supported by the fixed support 16 and projects from the fixed support 16 toward the drafting head 2.

ピン支持用側板部３０には上記ピン１９が止め
輪３２によつて抜けを防止した状態で支持されて
いる。 The pin 19 is supported on the pin supporting side plate portion 30 with a retaining ring 32 to prevent it from coming off.

上記可動支持台２８はピン１９が長孔１８内を
移動し得る範囲内において固定支持台１６の長手
方向に移動することができる。 The movable support base 28 can move in the longitudinal direction of the fixed support base 16 within the range in which the pin 19 can move within the elongated hole 18 .

回動ヒンジ部材９の縦キヤリツジ側９ａには下
方に突出した突起３３が設けられている。突起３
３の下端面部位には、水平支持板部２９のテーパ
面３１と共働して製図ヘツド２の重量を可動支持
台２８に支持させるための下端テーパ面３４が形
成されている。 A projection 33 projecting downward is provided on the vertical carriage side 9a of the pivot hinge member 9. Protrusion 3
A lower end tapered surface 34 for supporting the weight of the drafting head 2 on the movable support base 28 in cooperation with the tapered surface 31 of the horizontal support plate portion 29 is formed at the lower end surface portion of the drawing head 3 .

突起３３の下端テーパ面３４は、製図ヘツド２
及び直スケール４が製図板に密着しているときに
は、水平支持板部２９の上面よりも低い位置に存
在している。 The lower end tapered surface 34 of the protrusion 33 is connected to the drafting head 2.
When the vertical scale 4 is in close contact with the drawing board, it is located at a lower position than the upper surface of the horizontal support plate section 29.

回動ヒンジ部材９の縦キヤリツジ側９ａにおい
て突起３３が設けられた面と反対側の面には縦キ
ヤリツジ側９ａの一部を切欠いてロツク用凹部３
５が形成され、このロツク用凹部３５は縦キヤリ
ツジ１３に近い側に垂直なロツク用掛止面３６を
有している。 A locking recess 3 is formed by cutting out a part of the vertical carriage side 9a on the surface opposite to the surface on which the projection 33 is provided on the vertical carriage side 9a of the rotation hinge member 9.
5 is formed, and this locking recess 35 has a vertical locking surface 36 on the side closer to the longitudinal carriage 13.

他方、開閉ヒンジ部材１１にはその製図ヘツド
側１１ａにおいて下方に突出したロツク用突起３
８が形成されている。このロツク用突起３８及び
ロツク用掛止面３６が製図ヘツド２のその重量モ
ーメントによる回転を防止するように共働する。 On the other hand, the opening/closing hinge member 11 has a locking protrusion 3 projecting downward on its drafting head side 11a.
8 is formed. The locking protrusion 38 and the locking surface 36 cooperate to prevent rotation of the drafting head 2 due to its weight moment.

開閉ヒンジ部材１１の縦キヤリツジ側１１ｂに
は連結用ブラケツト１４の後面１４ａ（第１図中、
連結用ブラケツト１４の左側面）と共働するロツ
ク用掛止面３９が形成されている。このロツク用
掛止面３９は枢軸１５を中心軸として製図ヘツド
２及び開閉ヒンジ部材１１を製図板に対して旋回
起立させる場合に、連結用ブラケツト１４の後面
１４ａに当接して、製図ヘツド２及び直スケール
４を起こした状態のまま保持する機能を果す。 On the vertical carriage side 11b of the opening/closing hinge member 11, there is a rear surface 14a of the connecting bracket 14 (in FIG.
A locking surface 39 is formed which cooperates with the left side surface of the connecting bracket 14. This locking surface 39 comes into contact with the rear surface 14a of the connecting bracket 14 when the drafting head 2 and the opening/closing hinge member 11 are pivoted and erected with respect to the drafting board with the pivot 15 as the central axis. It functions to hold the vertical scale 4 in an upright position.

以下、上記製図ヘツドの浮上支持装置１の作用
について説明する。即ち、ノブ５を把持して製図
ヘツド２を製図上から持上げると第５図に示すよ
うに開閉ヒンジ部材１１が傾く。開閉ヒンジ部材
１１が傾いた状態で回動ヒンジ部材９の突起３３
を水平支持板部２９に載置する。この時、突起３
３の下端テーパ面３４は水平支持板部２９のテー
パ面３１に衝合される。圧縮コイルバネ２３のバ
ネ力は強力であつて、製図ヘツド２の重量を支え
たまま可動支持台２８は後退（第５図中、左方に
移動）することはない。 The operation of the drawing head floating support device 1 will be explained below. That is, when the drawing head 2 is lifted from the drawing by grasping the knob 5, the opening/closing hinge member 11 is tilted as shown in FIG. When the opening/closing hinge member 11 is tilted, the protrusion 33 of the rotating hinge member 9
is placed on the horizontal support plate section 29. At this time, protrusion 3
The lower end tapered surface 34 of No. 3 abuts against the tapered surface 31 of the horizontal support plate portion 29 . The spring force of the compression coil spring 23 is so strong that the movable support base 28 will not move backward (move to the left in FIG. 5) while supporting the weight of the drafting head 2.

回動ヒンジ部材９のロツク用掛止面３６は開閉
ヒンジ部材１１のロツク用突起３８に強く当接
し、開閉ヒンジ部材１１の横軸方向に回動ヒンジ
部材９は開閉ヒンジ部材１１の剛性に起因する反
力を受け、この反力による、突起３３の下端テー
パ面３４と可動支持台２８のテーパ面３１との狭
い当接面を中心とする反時計方向の回転モーメン
トは製図ヘツド２の重量に起因する上記狭い当接
面を中心とする時計方向の回転モーメントと均衡
する。これにより、製図ヘツド２は製図板に対し
て浮上した位置で、かつ、静止状態で支持され
る。 The locking surface 36 of the pivoting hinge member 9 strongly contacts the locking protrusion 38 of the opening/closing hinge member 11, and the pivoting hinge member 9 in the horizontal axis direction of the opening/closing hinge member 11 is caused by the rigidity of the opening/closing hinge member 11. The weight of the drafting head 2 generates a counterclockwise rotation moment about the narrow contact surface between the lower end tapered surface 34 of the projection 33 and the tapered surface 31 of the movable support 28 due to this reaction force. balance with the resulting clockwise rotational moment about the narrow abutment surface. As a result, the drafting head 2 is supported in a stationary position at a floating position relative to the drafting board.

第５図に示された浮上支持状態から第１図に示
された製図板への密着状態へ復帰させるために
は、製図者がノブ５を圧縮コイルバネ２３のバネ
力に抗して下向きに押圧すると突起３３が下端テ
ーパ面３４及びテーパ面３１の係合を介して可動
支持台２８を後退させることにより回動ヒンジ部
材９のロツク用掛止面３６と開閉ヒンジ部材１１
のロツク用突起３８との掛合が外され、ロツクが
解除される。これにより製図ヘツド２は製図板に
密着する。 In order to return from the floating support state shown in FIG. 5 to the state in close contact with the drawing board shown in FIG. 1, the drafter presses the knob 5 downward against the spring force of the compression coil spring 23. Then, the protrusion 33 causes the movable support base 28 to retreat through engagement between the lower end tapered surface 34 and the tapered surface 31, thereby engaging the locking surface 36 of the rotating hinge member 9 and the opening/closing hinge member 11.
is disengaged from the locking protrusion 38, and the lock is released. This brings the drafting head 2 into close contact with the drafting board.

突起３３の下端テーパ面３４と水平支持板部２
９のテーパ面３１との係合が外される際に、可動
支持台２８は若干時計方向に回転することにより
スムースに回動ヒンジ部材９の下降を逃げること
ができる。時計方向に若干回動した可動支持台２
８の姿勢はピン支持用側板部３０の下端部が姿勢
修復用板バネ２６に反時計方向に押し上げられて
修復される。 Lower end tapered surface 34 of protrusion 33 and horizontal support plate portion 2
When the movable support base 28 is disengaged from the tapered surface 31 of the movable support base 28, the movable support base 28 rotates slightly clockwise, thereby allowing the pivot hinge member 9 to smoothly escape from lowering. Movable support base 2 slightly rotated clockwise
The posture No. 8 is restored by pushing up the lower end of the pin supporting side plate 30 counterclockwise by the posture restoring leaf spring 26.

上記の実施例においては剛体的性質を具えた可
動支持台２８が固定支持台１６の長手方向に後退
することにより製図ヘツド２の浮上支持状態の解
除を行つたが、別の実施例としては可動支持台を
製図ヘツド２の重量を支持し得る程度の板バネ材
により構成してもよい。この場合には可動支持台
の下方への曲げによつて所期の機能を達すること
ができる。即ち、いずれの場合にあつても可動支
持台が製図ヘツドを支持する製図ヘツド支持位置
からロツク手段解除位置まで移動可能に弾持され
ていれば良いものである。 In the above embodiment, the floating support state of the drafting head 2 is released by moving the movable support base 28, which has a rigid property, back in the longitudinal direction of the fixed support base 16, but in another embodiment, the movable support base 28 The support stand may be constructed of a leaf spring material sufficient to support the weight of the drafting head 2. In this case, the desired function can be achieved by bending the movable support table downward. That is, in any case, it is sufficient that the movable support table is supported so as to be movable from the drafting head support position where the drafting head is supported to the locking means release position.

このように本考案によれば、製図ヘツドを浮上
支持した状態から単に製図ヘツドを製図板に垂直
な方向に押圧するのみで浮上支持状態を解除する
ことができるので煩しさが存在しない効果を奏す
る。 As described above, according to the present invention, the floating and supported state of the drafting head can be released by simply pressing the drafting head in a direction perpendicular to the drawing board from the state where the drafting head is supported in a floating manner, so that there is no inconvenience. .

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例に係る製図ヘツドの
浮上支持装置の断面図であつて未だ該支持装置が
動作していない状態を示している。第２図は製図
ヘツドの浮上支持装置における固定支持台と可動
支持台との組付状態を示す側面図、第３図は製図
ヘツドの浮上支持装置の底面図、第４図は可動支
持台の斜視図、第５図は上記製図ヘツドの浮上支
持装置が動作している状態を示す装置の一部省略
断面図である。 １……製図ヘツドの浮上支持装置、２……製図
ヘツド、９……回動ヒンジ部材、９ａ……縦キヤ
リツジ側、１１……開閉ヒンジ部材、１２……枢
軸、１３……縦キヤリツジ、１４……連結用ブラ
ケツト、１５……枢軸、２３……圧縮コイルバ
ネ、２８……可動支持台、３３……突起、３６…
…ロツク用掛止面、３８……ロツク用突起。 FIG. 1 is a sectional view of a floating support device for a drafting head according to an embodiment of the present invention, showing a state in which the support device is not yet in operation. Figure 2 is a side view showing the assembled state of the fixed support and movable support in the drafting head floating support device, Figure 3 is a bottom view of the drafting head floating support, and Figure 4 is the movable support. The perspective view and FIG. 5 are partially omitted cross-sectional views of the device showing a state in which the floating support device of the drafting head is in operation. DESCRIPTION OF SYMBOLS 1... Drafting head floating support device, 2... Drafting head, 9... Rotating hinge member, 9a... Vertical carriage side, 11... Opening/closing hinge member, 12... Pivot, 13... Vertical carriage, 14 ... Connection bracket, 15 ... Pivot, 23 ... Compression coil spring, 28 ... Movable support base, 33 ... Protrusion, 36 ...
...Latching surface for locking, 38...Protrusion for locking.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 縦キヤリツジから製図ヘツドの方へ突設された
連結用ブラケツトと、製図板を滑走する製図ヘツ
ドの移動に対してこの製図ヘツドと一体的に連結
され、かつ、製図ヘツドを製図板に密着するよう
に枢支する回動ヒンジ部材との間に枢軸を介して
開閉ヒンジ部材を連結し、この開閉ヒンジ部材と
回動ヒンジ部材との間に製図ヘツドの重量に起因
する回転モーメントに抗するロツク手段を設ける
一方、上記連結用ブラケツトに製図ヘツド支持用
の可動支持台を製図ヘツド支持位置と上記ロツク
手段解除位置間を移動可能に弾持させ、製図ヘツ
ドを製図板から浮上させることにより回動ヒンジ
部材の縦キヤリツジ側を載置し製図ヘツドを浮上
支持するようにした製図ヘツドの浮上支持装置。 A connecting bracket protrudes from the vertical carriage toward the drafting head, and is integrally connected to the drafting head against the movement of the drafting head as it slides on the drafting board, and is configured to bring the drafting head into close contact with the drafting board. The opening/closing hinge member is connected via a pivot between the opening/closing hinge member and the rotating hinge member, and a locking means for resisting the rotational moment caused by the weight of the drafting head is provided between the opening/closing hinge member and the rotating hinge member. At the same time, a movable support for supporting the drafting head is elastically supported on the connecting bracket so as to be movable between the drafting head support position and the locking means release position, and the drafting head is lifted from the drafting board, thereby creating a rotation hinge. A floating support device for a drafting head in which a vertical carriage side of a member is placed and the drafting head is floated and supported.