JPS5986713A - Carriage supporting device - Google Patents

Carriage supporting device

Info

Publication number
JPS5986713A
JPS5986713A JP19660482A JP19660482A JPS5986713A JP S5986713 A JPS5986713 A JP S5986713A JP 19660482 A JP19660482 A JP 19660482A JP 19660482 A JP19660482 A JP 19660482A JP S5986713 A JPS5986713 A JP S5986713A
Authority
JP
Japan
Prior art keywords
shaft
carriage
pressure gas
air
support
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.)
Pending
Application number
JP19660482A
Other languages
Japanese (ja)
Inventor
Narimoto Tenmiyo
天明 成元
Hiroshi Koide
博 小出
Junichi Watanabe
順一 渡辺
Kenta Watase
渡瀬 賢太
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP19660482A priority Critical patent/JPS5986713A/en
Publication of JPS5986713A publication Critical patent/JPS5986713A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00Bearings not otherwise provided for
    • F16C32/06Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moving Of Heads (AREA)

Abstract

PURPOSE:To prevent the wear of a shaft hole by using dynamic pressure gas bearings and a static pressure gas bearings for supporting a carriage, and operating the static pressure gas bearings when the rotating speed of the shaft which constitutes one of the dynamic pressure gas bearings has assumed a predetermined value. CONSTITUTION:Air inlet ports for the static pressure gas bearing are provided in the carriage 3. These air inlet ports 17 communicate with minute gas between the shaft 7 and the support sleeves 6. The shaft 7 rotates by a driving motor 11, and the carriage 3 is driven in the direction of an arrow B while being supported by the dynamic pressure gas bearings when the shaft 7 is in a state of reaching a predetermined rotating speed. On the other hand, when the rotating speed of the shaft 7 is less than the predetermined value, the static pressure bearings are operated. That is, the rotating speed of the shaft 7 discriminates the rotating speed of the motor 11 by operating an air valve driving circuit, and compressed air is supplied from the air inlet ports 17 to the gaps between the shaft sleeves 6 and the shaft 7 to thereby support the carriage 3 by air pressure.

Description

【発明の詳細な説明】 本発明は、直線運動するキャリッジの支持装置に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support device for a linearly moving carriage.

移動体であるキャリッジを所定行程量、直線的に往復動
させろ装置をl、例えば、ビデオディスク等の記録媒体
を用いたffr報記録・再生装置に使用さJlている。
A device for linearly reciprocating a carriage, which is a moving body, by a predetermined distance is used, for example, in an FFR information recording/reproducing device using a recording medium such as a video disk.

斯る装備°において、情@記録・再生用のへノドをビデ
オディスク等のトラックに正しく追従運動させるために
は、このようなヘッドの積載さ′11たキャリッジを、
極めて高精度に直線移動させねばならな(・。このよう
なキャリノンを高精度に移動させる場合に最も問題とな
るところはキャリッジの支持機構に関してである。
In such equipment, in order to make the information recording/reproducing head correctly follow the track of the video disk, etc., it is necessary to use a carriage loaded with such a head.
It must be moved in a straight line with extremely high precision (.) The biggest problem when moving such a carnon with high precision is the carriage support mechanism.

このようなキャリッジの支持HPとして、小型で微振動
を生じない非接触式の勤王気体軸受を用いたものが提案
さ旧ている(特願昭57−330087号)。この勤王
気体軸受は、回転駆動されるd伯と、こねに嵌挿さJす
るキャリンジ舗受面との相対的なすべり運動によって、
軸と軸受との微少間隙に流体を誘い込み、こ矛1によっ
て発生した流体膜圧力で軸上の負荷を支持するものであ
る。
As a supporting HP for such a carriage, a system using a small non-contact type gas bearing that does not generate minute vibrations has been proposed (Japanese Patent Application No. 330087/1987). This gas bearing is driven by the relative sliding movement between the rotationally driven shaft and the bearing surface of the carriage that is inserted into the shaft.
Fluid is introduced into the minute gap between the shaft and the bearing, and the load on the shaft is supported by the fluid film pressure generated by the spear 1.

このような動圧気体軸受を、キャリッジの支持機構に適
用した場合、軸が所定回転数に達して前RL:流体膜田
力によって負荷?与えるに至るまでの間、輔と軸受面と
&’j接触する仲間となっていて、このドF触がなさJ
また場合、両者に摩擦摩耗が発生し、キャリッジVC微
少振動を生じる上;それがあった。このような現象は装
管が停止しようとするとき、即ち軸が停止しようとする
までの間でも生じていた。
When such a hydrodynamic gas bearing is applied to a carriage support mechanism, when the shaft reaches a predetermined rotation speed, the front RL is loaded by fluid film force. Until it is applied, the support and the bearing surface are in contact with each other, and there is no contact between them.
Further, in this case, frictional wear occurs on both of them, causing slight vibrations of the carriage VC. This phenomenon occurred even when the tube was about to stop, that is, until the shaft was about to stop.

従来においては、このような装置の稼動開始および停止
時に発生する摩擦摩耗に対しては、その球耗に耐え得る
軸や軸受の材料を選X7で(・た。このためには材料選
定に関し極めて大きな制約を受け、また、コストの上昇
をきたすとともに、号産注にも障害をなしていた。
In the past, materials for shafts and bearings that could withstand the frictional wear that occurs when starting and stopping the operation of such devices were selected (*7). This was subject to significant restrictions, increased costs, and was also an obstacle to ordering special production.

本発明は、上記従来欠点を除去した、軸と軸受面との相
互の摩擦摩耗が防止される、こわらの材料に限定な与え
ない、キャリッジの支持装置な提供することを目的とす
る。
SUMMARY OF THE INVENTION An object of the present invention is to provide a carriage support device which eliminates the above-mentioned conventional drawbacks, prevents mutual frictional wear between the shaft and the bearing surface, and is not limited to stiff materials.

以下、図面参照して本発明を具体的かつ詐細に説明する
Hereinafter, the present invention will be specifically and precisely explained with reference to the drawings.

”A□ 1図は本発明の一適用例である光ディスク装置
な示しており、ディスク1は駆動モータ2によって回転
部i仙さねるようになっていて、一方、後述する光ビノ
クアノプユ二ットを具備したキャリア シ3 &1. 
、  リニアモータ4の駆動によりディスク]のトラッ
クと直交する方向即ちディスクのラジアル方向に移送さ
違1、トラッキングが行なわねろと共に、そのリニアモ
ータ4により1トラツキ7グ補正も同時に行t、rわね
るようになっている。
``A□ 1'' shows an optical disk device which is an application example of the present invention, in which a disk 1 is rotated by a rotating part i by a drive motor 2, and an optical disk drive unit (to be described later) is mounted. Carrier equipped with 3 &1.
By driving the linear motor 4, the disc is moved in a direction perpendicular to the track of the disc, that is, in the radial direction of the disc.At the same time, the linear motor 4 also performs one-track correction at the same time. It looks like this.

ここで、本発明を良好に理解するために、従来のキャリ
ッジ支持1fiFKついてH;1.明するに、オ・2図
はその従叱のキャリッジ支持装置の一例を示す本のであ
る。同図において、キャリ、ノン3け、対物レンズ5や
図示さねない光源や受ゲC部やフォーカス調整用モータ
等を格納した光ビノクアノプユニノ)3a’%j有して
いて、キャリッジ30本体には、才3図に示す如く軸支
持スリーブ6が両1411に2箇、固く嵌め込まねてい
る。そして、このスリーブ6の内径はキャリア3に相通
した軸穴を構成しており、今こび)軸穴を便宜上、符号
6a  で示1−0各軸穴6a  Vcは、キャリッジ
3の往復動方向(符号Bで示す)に配設さね互に平行す
る軸7゜7が微少間隙をもってそわぞネu°通していて
、この軸7目:、副・2図に示す如く、この両軸端部が
わを、ランアルとスラスト方向の力を受ける軸受8゜9
によって[11転自在にす持さねでいる。
Here, in order to better understand the present invention, regarding the conventional carriage support 1fiFK, H;1. To be clear, Figure 2 is from a book showing an example of the conventional carriage support device. In the same figure, it has a carriage, a non-illustrated lens, an objective lens 5, a light source (not shown), a light receiving part, a focus adjustment motor, etc. (3a'%j), and a carriage. As shown in Figure 3, two shaft support sleeves 6 are firmly fitted into the main body of the 30 on both sides 1411. The inner diameter of this sleeve 6 constitutes a shaft hole that communicates with the carrier 3. For convenience, each shaft hole 6a to 1-0 is designated by the reference numeral 6a, and each shaft hole 6a to Vc is in the reciprocating direction of the carriage 3 ( Shafts 7°7 parallel to each other (indicated by reference numeral B) pass through each other with a slight gap, and as shown in sub-figure 2, the ends of both shafts Bearings that receive force in the direction of run and thrust 8゜9
By [11 I can move freely.

両軸7.7は、駆動モータ11.弾はカップリング]2
.ブー!J]3.  伝達ベルト]4およびプーリ15
を介して回転駆動されるようになっていて、斯る部組1
1手段により、軸7が回転すると1才3図に示す軸穴6
a  と軸7との間の微少間隙に介在する、空気に対し
てラジアル方向のカが発生し、この方によって負荷、即
ち、キャリッジ3が支持されるようになっている。この
ような軸受は動圧気体軸受と呼ばJlており、キャリッ
ジ3がリニアモータ4のような往復駆動手段によって矢
印B方向に駆動サワル際、斯る動圧気体軸受によってキ
ャリッジ3は支持されるのである。
Both shafts 7.7 are connected to drive motors 11. The bullet is coupled] 2
.. Boo! J]3. Transmission belt] 4 and pulley 15
The part set 1 is rotatably driven through the
When the shaft 7 rotates by one means, the shaft hole 6 shown in Fig.
A force is generated in the radial direction against the air that is present in the minute gap between a and the shaft 7, and the load, that is, the carriage 3 is supported by this force. Such a bearing is called a hydrodynamic gas bearing, and when the carriage 3 is driven in the direction of arrow B by a reciprocating drive means such as a linear motor 4, the carriage 3 is supported by such a hydrodynamic gas bearing. be.

このような動圧気体軸受によるキャリッジ支持方式は、
キャリッジの軸穴が、こねを貫通し所定の、回転数で回
転する軸に対し、無接触で移動するようになっているか
ら、振動等を生じないで、高精度にキャリアを往復動せ
しめることかできる。
This type of carriage support method using hydrodynamic gas bearings is
Since the shaft hole of the carriage passes through the kneader and moves without contact with the shaft that rotates at a predetermined number of rotations, the carrier can be reciprocated with high precision without causing vibration etc. I can do it.

この従来装置は、1対の動圧気体軸受を用いるようにし
たものであり、このような方式においては、11117
がある規定値の回転数で回っている場合はよいが、+1
Ml+ 7が所定のli:、ii転数以下の回転状態で
あるとき、例えば、軸7の駆動開始時あるいは駆りηノ
停止移行時、mh圧圧気軸軸受しては負荷を支持するだ
けの支持方を得ることができず、このため、軸と軸穴と
が相互に接触し、このため、摩擦による摩耗が発生し、
il+若しくは軸穴の表面に傷等を生じて、キャリッジ
に撮動を発生する間頼があった。従来は、このような廓
に対処するために、軸や軸支持スリーブを摩耗に耐え得
るような材料で構成していたのであるが、このためコス
ト高になる欠虞があった。
This conventional device uses a pair of dynamic pressure gas bearings, and in this type of system, 11117
It is fine if it is rotating at a certain specified number of revolutions, but +1
When Ml+ 7 is in a rotational state below a predetermined number of rotations li:, ii, for example, when the shaft 7 starts driving or when the drive η transitions to a stop, the mh pressure air shaft bearing provides sufficient support to support the load. Therefore, the shaft and the shaft hole come into contact with each other, which causes wear due to friction.
There was a possibility that a scratch or the like would occur on the surface of the il+ or the shaft hole, causing the carriage to move. Conventionally, in order to deal with this problem, the shaft and the shaft support sleeve have been constructed of materials that can withstand wear, but this has the disadvantage of increasing costs.

本発明は、このような間匪を解決し、たものである。The present invention solves this problem.

本発明の’l’!i’ Rとするところは、キャリノン
を支持するための+11+受として、Q+圧圧気軸軸受
、静子気体軸受とを用い、動圧気体軸受の一つな構成す
る軸の回転数が所定値以下となったとき、後者の静圧気
体軸受を作1Thせしめることにある。
'l' of the present invention! i' R means that a Q+ pressure air shaft bearing and a static gas bearing are used as +11+ bearings to support the carrinon, and the rotation speed of the shaft that constitutes one of the dynamic pressure gas bearings is below a predetermined value. When this happens, the objective is to create the latter static pressure gas bearing.

このように41′♂を成すると、軸と軸穴面との間の相
互の接触か防止さ」1、こf)ため、当然、そわらの摩
耗が防止されることになる。従ってこねに伴なうキャリ
ッジ振動が防止さね、かつ、軸や軸支持スリーブ等の材
料選定上の制約を解消することができる。
Forming 41'♂ in this way prevents mutual contact between the shaft and the shaft hole surface, which naturally prevents wear of the warp. Therefore, vibration of the carriage due to kneading can be prevented, and restrictions on the selection of materials for the shaft, shaft support sleeve, etc. can be eliminated.

川・4図K、本発明一実施例のキャリッジ支持装置が示
されており、この装置においては、便宜上、従来例の符
号と同一の符号を用いた。この実施例と従来例との相違
、ぐは、キャリッジ3に、静圧気体軸受のためのを気性
入口J7.]、7が設けらねでいる点にある。この空気
注入口1.7.17は軸7と、軸支持スリーブ6との間
の微少間隙に連通している。なお、このような構成は、
矛2図において、2本のM7にそねぞね適用されている
Figure 4 K shows a carriage support device according to an embodiment of the present invention, and for convenience, the same reference numerals as in the conventional example are used in this device. The difference between this embodiment and the conventional example is that the carriage 3 has a gas inlet J7 for the static pressure gas bearing. ], 7 are not provided. This air inlet 1.7.17 communicates with the small gap between the shaft 7 and the shaft support sleeve 6. Note that such a configuration is
In Figure 2, it is applied to the two M7s.

壜・4図において、軸7は前記駆動モータ11(第2図
参照)によって回転駆動せられるが、この場合、軸7が
所定の回転数に達し、ている状態で、ギヤIJ 、ジ3
(ま、前記動圧気体軸受により支持され乍ら、矢印B方
向に駆動さねる。
In Figure 4, the shaft 7 is rotationally driven by the drive motor 11 (see Figure 2), but in this case, when the shaft 7 reaches a predetermined rotation speed, the gears IJ and 3
(While being supported by the hydrodynamic gas bearing, it is not driven in the direction of arrow B.

こ罎1に対し、例えば、光デイスク装置が稼動なiF4
始する場合には、まず、駆動モータ]1が回転を始める
ことにt「る。この場合には軸の111転Efが所定の
回転数以下とt、rつでおり、このとぎ、静圧気体軸受
を作動する。即ち、刀・4図に示す空気注入口]7から
、圧縮さ第1た空気を注入し、軸支持スリーブ6と軸7
とσ)間隙にその圧縮空気を供給して、その空気下方で
キ、トリソジ3を支持させるようにする。そして、前配
駆1助モータ]Jの回転数が所定値に達した場合、l:
E flii 9気の供給を途絶して静圧気体軸受の作
動を停止せしめる。
For case 1, for example, if the optical disk device is in operation, iF4
When starting, first, the drive motor 1 starts rotating. In this case, the 111 rotation Ef of the shaft is equal to or less than the predetermined rotation speed, and at this point, the static pressure Activate the gas bearing, that is, inject compressed air from the air inlet shown in Figure 4 to the shaft support sleeve 6 and the shaft 7.
and σ) The compressed air is supplied to the gap so that the trisodium 3 is supported under the air. When the rotational speed of the front drive first auxiliary motor J reaches a predetermined value, l:
E flii 9 Cut off the air supply and stop the operation of the static pressure gas bearing.

才5図は本発明装置の作動を制御するためσ)回路図例
を示すものであって、図中符号18で示すものはコンパ
レータである。
Figure 5 shows an example of a circuit diagram for controlling the operation of the device of the present invention, and the reference numeral 18 in the figure is a comparator.

ここで、目標値(軸7の所望の設定回転材)と、実際の
駆動モータの回転数とを比較し、当該時ルの軸70回転
数が目標値以下であわば、駆抑1モータな増速するよう
に電流を供給する。従って、ヲr、分、時間が経過した
後は、膓帥モータの回転−7!…所定の目標値に達する
Here, the target value (desired set rotating material of shaft 7) is compared with the actual rotation speed of the drive motor, and if the rotation speed of the shaft 70 at that time is less than the target value, the drive suppressor 1 motor is Supply current to increase speed. Therefore, after wor, minutes, and time have elapsed, the rotation of the motor is -7! ...A predetermined target value is reached.

コンパレータ18は、組型IIモータの実際の回転数が
所定のIL!1転数に達したか否かを判定する。そして
、その判定により、駆動モータが所定の回転数以下であ
わば、空気弁駆動回路を作動し、突気弁】9 な開放駆
動する。
The comparator 18 determines whether the actual rotational speed of the set type II motor is at a predetermined IL! It is determined whether the number of turns has reached one. Based on this determination, if the drive motor is below a predetermined rotational speed, the air valve drive circuit is operated to open the thrust valve.

ここで、空気弁J9は、矛7図に示すような空気供給径
路中に設げられでいて、コンプレッサからの圧縮空気を
空気注入口】7へ送り込んでそねを前81:間隙内に供
給し、たり、あるいはその供給を途絶停止したりする。
Here, the air valve J9 is provided in the air supply path as shown in Figure 7, and sends compressed air from the compressor to the air inlet 7 to supply the air into the gap. , or interrupt or stop its supply.

そして、前記空気弁部iiJ+回路が作%j+ Lだ場
合には、空気弁19が開かね、圧縮空気が墾気江入口へ
導びかJl、この状p目で、静圧気体軸受は作動した状
歴となる。
Then, when the air valve part iiJ+ circuit is activated %j+L, the air valve 19 cannot open and the compressed air is guided to the inlet of the Kenqi River.In this state p, the static pressure gas bearing is activated. His condition is as follows.

以上の説明から明らかなように、1l1117が所定回
転数以下であって、キャリノンの軸穴が軸7に接触傾向
にあるとぎには、静圧気体軸受が作動するようになり℃
いろので、軸と軸穴面との相互の摩擦接触は回避さ牙1
、従って、その摩擦摩耗に起因するキャリッジの微振動
を防止することができる。
As is clear from the above explanation, when 1l1117 is below a predetermined rotational speed and the shaft hole of the carnon tends to come into contact with the shaft 7, the hydrostatic gas bearing comes into operation.
Because of the color, mutual frictional contact between the shaft and the shaft hole surface is avoided.
Therefore, it is possible to prevent slight vibrations of the carriage due to frictional wear.

また、軸や軸支持スリーブ等の材料選定上の制約も取り
除かJl、広汎な材料の選択が可能となり、量産上の問
題も除去される。
Additionally, restrictions on material selection for shafts, shaft support sleeves, etc. are removed, making it possible to select from a wide range of materials, and problems with mass production are also eliminated.

なお、コンプレーサは、オ・6図に例示さJするような
構成となっていて、モータによりポツプをJjlノ動し
、空気をアキュムレータ(蓄圧器)へ送り込む。こねに
よりアキュムレータの出力口には一定圧の空気が噴出さ
第1ることになる。
The compressor has a configuration as shown in FIG. 6, and a pop is moved by a motor to feed air into an accumulator. As a result of kneading, air at a constant pressure is ejected from the output port of the accumulator.

出力口かC)のり、“′気晴および?g気IE(流量)
はアキュムレータの大きさおよび出力口の径の大ぎさ等
によって決定される。この場合、流、量が大きい程、モ
ータのパワーが必要となり、こわに従ってモータは大き
くなる。
Output port or
is determined by the size of the accumulator and the diameter of the output port. In this case, the larger the flow or amount, the more power the motor will require, and the larger the stiffness, the larger the motor will be.

なお、この実施例で使用されるコンプレッサからの全空
気111゛は、ギヤリッジを静圧気体軸受だけで支持ず
Z7 JA合よりも非常に少なくて済む。こJlは、前
述したように、動圧軸(符号7)と軸受面(符号6a 
 )との相対速度が、所定の回転数以下の場合の速度と
なっている場合だけ、静圧気体軸受を作動すt+、 1
7よいからである。
It should be noted that the total amount of air 111'' from the compressor used in this embodiment is much less than in the case of Z7 JA, since the gear ridge is not supported only by the hydrostatic gas bearing. As mentioned above, this Jl consists of the dynamic pressure shaft (symbol 7) and the bearing surface (symbol 6a).
), the static pressure gas bearing is activated only when the relative speed with respect to
7 Because it is good.

このことを、訓・7図や:’l−30図を用いて説明す
る。
This will be explained using Figure 7 and Figure 30.

才」0図は時間の経過に伴なう動圧軸の回転数立ち上が
り特上曲線な示しており、静圧気体[1?t+受が作動
する区間は、所定の回転数n1  以下の区間、即ち、
時刻to  からtl  までの区間である。従って、
勤王軸が時刻tQ  から時刻t1  まで1M1転す
る間、静圧気体軸受が作動するようになっていわばよく
、このため、コンプレッサの空気量としては非常に小さ
いもので済むのである。
Figure 0 shows a special curve of the rise in the rotational speed of the dynamic pressure axis over time, and it shows a special curve for the rise in the rotational speed of the dynamic pressure axis over time. The section in which the t+ receiver operates is the section where the rotation speed is less than or equal to the predetermined rotation speed n1, that is,
This is the section from time to to tl. Therefore,
While the rotation shaft rotates 1M1 from time tQ to time t1, the static pressure gas bearing is activated, so to speak, and therefore, the amount of air in the compressor can be extremely small.

275図に示す回路例は、駆動源の回転数を制御するも
のである。こflは該駆動源に連結部材を介し、て連結
さセた動E軸の回転数を制御するようにしたものである
が、こ場1に対し、該駆動源に一定πf1圧を印加して
動圧軸の回転数な得る場合もある。
The circuit example shown in FIG. 275 controls the rotation speed of the drive source. This fl is designed to control the rotation speed of the moving E-shaft connected to the drive source via a connecting member, but in contrast to field 1, a constant πf1 pressure is applied to the drive source. In some cases, the rotation speed of the dynamic pressure shaft can be obtained.

この場合に、駆動源の回転数が才】0図に示す如く立ち
上がったとする。
In this case, assume that the rotational speed of the drive source rises as shown in FIG.

ここで、静圧気体軸受が作匍1する最小領域は、所定の
1i:lIi転数n1  以下の領域、つまり、時刻t
Here, the minimum area in which the hydrostatic gas bearing operates is the area below the predetermined 1i:lIi rotation number n1, that is, at time t
.

より時刻t1  までの時間の範囲である。従って、駆
動モータヘ一定電圧を供給してから、少なくともtl 
 時間以上、静圧気体軸受を作動すわば良い3なお、斯
る静圧気体軸受の作動は、勤王軸がこの回転を停止する
までの間、即ち、その回転数か所ところで、A77図に
示す空気供給系は、コンプレッサからの’F、 IJr
i空気を劣′気弁J9を介し、て空気注入口J7へ送り
込むようにしたものであるが、この場合に、空気弁る・
自動開閉させることなく、マニュアルでその開閉を行な
うようにしてもよい。
This is the time range up to time t1. Therefore, after supplying a constant voltage to the drive motor, at least tl
It is sufficient to operate the static pressure gas bearing for more than 3 hours.3The operation of the static pressure gas bearing is continued until the rotation of the rotary shaft stops, that is, at that number of rotations, as shown in Figure A77. The air supply system is 'F, IJr from the compressor.
i Air is sent to the air inlet J7 via the low air valve J9, but in this case, the air valve
The opening and closing may be performed manually without opening and closing automatically.

オ・8図に示す′!ト気供給系(11、コンプレッサ部
分を蓄圧器としたものであるが、この方式では、蓄圧器
として(I、マニュアルにより輩気を蓄えることが可能
で、蓄圧器からは脈動のない略−2ぜ王のψ気が噴出さ
矛する。このように構味、すると、蓄田部を小型かつ低
11゛Cにすることかで敦ろ。
E. Shown in Figure 8'! The air supply system (11) uses the compressor as a pressure accumulator. The king's ψ energy is erupting.If you think about it like this, you can do it by making the storage area small and keeping it at a low temperature of 11゛C.

田・9図に示ず空気供給系は、さらに、この構成な簡易
化したものであり、前記時刻tQ  から時刻t1  
までの間、蓄圧器より空気注入口へ直接、空気を送り込
むものである。
The air supply system, not shown in Figure 9, is a simplified version of this configuration, and from the time tQ to the time t1.
Until then, air is sent directly from the pressure accumulator to the air inlet.

以上、本発明は、キャリッジに貫通する軸が所定回転数
以上のとき、そのキャリッジを動圧気体軸受にて支持せ
しめ、所定−1転数以下のとき、そのキャリッジを静圧
気体軸受にて支持せしめるようにしたものであるから、
軸とキャリノン軸穴との相互の摩擦接触が回避さね、こ
のため、摩擦摩耗に起因するキャリッジの微振動を防止
することができると共に、こゎらの材料の選定に関し所
定の制約を受けないようにすることかでと、この種の装
置の量産にも充分に対処し得るものである。
As described above, the present invention supports the carriage with a hydrodynamic gas bearing when the rotation speed of the shaft penetrating the carriage is above a predetermined rotation speed, and supports the carriage with a hydrostatic pressure gas bearing when the rotation speed of the shaft passing through the carriage is below a predetermined −1 rotation speed. Because it was designed to encourage
Mutual frictional contact between the shaft and the carillon shaft hole is avoided, making it possible to prevent slight vibrations of the carriage caused by frictional wear, and to avoid being subject to certain restrictions regarding the selection of these materials. In other words, it is sufficient to cope with the mass production of this type of device.

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

オ・1図は本発明の一適用例である光デイスク装置の正
面図、第2図は従来のキャリノン支持装貨の平面図、層
・3図は同上キャリッジ支持装貨の斜視図、3・4図は
本発明一実施例のキャリッジ支持装置の部分破断正面図
、3・5図は同上キャリ、ジ支持製置の作動制御回路図
、オフ6図はコンプレッサの構成ブロック図5オフ図及
至矛9図は空気供給系を各実確例につき示す図、調・]
(1図は動I+E軸の、畦1間の経過に伴なう回転数立
ち上がり特注曲線図である。 、3・・・キャリノン、6a・・・軸穴、7・・軸馬 
b。 l7P)e、Z
Fig. 1 is a front view of an optical disk device which is an application example of the present invention, Fig. 2 is a plan view of a conventional carriage support load, Fig. 3 is a perspective view of the same carriage support load, and Fig. 3 is a perspective view of the same carriage support load. Figure 4 is a partially cutaway front view of a carriage support device according to an embodiment of the present invention, Figures 3 and 5 are operation control circuit diagrams for the same carriage and support arrangement, and Figure 6 is a block diagram of the compressor. Figure 9 is a diagram showing the air supply system for each concrete example.
(Figure 1 is a custom-made curve diagram of the rotation speed rise as the distance between ridges 1 of the dynamic I+E axis progresses. , 3... Carignon, 6a... Shaft hole, 7... Axle horse
b. l7P) e, Z

Claims (1)

【特許請求の範囲】[Claims] キャリッジに設けた軸穴に微少間隙をもって貫通する軸
を回転させる構成の動圧気体軸受で、軸方向に移動する
キャリッジを支持せしめ、かつ、前記間隙に圧縮空気を
供給しこの空気圧力でキャリッジを支持する構成の静圧
気体軸受で、前記軸σ)回転数が所定値以下になったと
ぎ、前記キャリノンを支持せしめることな特徴とするキ
ャリッジ支持装置。
This dynamic pressure gas bearing is configured to rotate a shaft that passes through a shaft hole provided in the carriage with a small gap, and supports the carriage moving in the axial direction, and also supplies compressed air to the gap and uses this air pressure to move the carriage. A carriage support device, characterized in that the carriage supporting device is configured to support the carillon when the rotational speed of the shaft σ) becomes equal to or less than a predetermined value, using a static pressure gas bearing configured to support the carriage.
JP19660482A 1982-11-09 1982-11-09 Carriage supporting device Pending JPS5986713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19660482A JPS5986713A (en) 1982-11-09 1982-11-09 Carriage supporting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19660482A JPS5986713A (en) 1982-11-09 1982-11-09 Carriage supporting device

Publications (1)

Publication Number Publication Date
JPS5986713A true JPS5986713A (en) 1984-05-19

Family

ID=16360508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19660482A Pending JPS5986713A (en) 1982-11-09 1982-11-09 Carriage supporting device

Country Status (1)

Country Link
JP (1) JPS5986713A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194825U (en) * 1985-05-27 1986-12-04
US5010824A (en) * 1989-12-04 1991-04-30 Ptx-Pentronix, Inc. Linearly movable tool or work handling unit
JPH04147473A (en) * 1990-10-09 1992-05-20 Matsushita Electric Ind Co Ltd Head transfer device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194825U (en) * 1985-05-27 1986-12-04
US5010824A (en) * 1989-12-04 1991-04-30 Ptx-Pentronix, Inc. Linearly movable tool or work handling unit
JPH04147473A (en) * 1990-10-09 1992-05-20 Matsushita Electric Ind Co Ltd Head transfer device

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