JPH07107759A - Vibration wave linear motor - Google Patents

Vibration wave linear motor

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Publication number
JPH07107759A
JPH07107759A JP5248027A JP24802793A JPH07107759A JP H07107759 A JPH07107759 A JP H07107759A JP 5248027 A JP5248027 A JP 5248027A JP 24802793 A JP24802793 A JP 24802793A JP H07107759 A JPH07107759 A JP H07107759A
Authority
JP
Japan
Prior art keywords
rail
shaped stator
vibration wave
elastic body
linear motor
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
JP5248027A
Other languages
Japanese (ja)
Inventor
Hiroshi Watanabe
宏 渡辺
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP5248027A priority Critical patent/JPH07107759A/en
Publication of JPH07107759A publication Critical patent/JPH07107759A/en
Pending legal-status Critical Current

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  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

PURPOSE:To realize the high accuracy of the control of a position and a speed, the saving of a space and the like in a vibration wave linear motor from the viewpoint of a position detection means. CONSTITUTION:A regular pattern part 8c constituted in such a way that slits at equal intervals are formed at its top part along its length direction (a direction to be moved) and an irregular pattern part 8d which is composed of one opening hole part used to indicate a reference position at the lower-part side of the regular pattern part 8c are formed in a guide rail part 8b for a rail- shaped stator 8 which restrains the movement of a mounting stand 4, Then, a position, detection sensor which is composed of a light-projecting element and a photodetector is installed at the mounting stand 4 so as to sandwich the regular pattern part 8c, a reference-position detection sensor which is composed of a light-projecting element and a photodetctor is installed so as to sandwich the irregular pattern part 8d, and signals from the sensors are output to a drive control circuit.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は振動波モーター、特に進
行波が形成される弾性体をレール状固定子に圧接し、弾
性体をレール状固定子に沿って移動させる方式の振動波
リニアモーターに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration wave motor, and more particularly to a vibration wave linear motor of a type in which an elastic body on which a traveling wave is formed is pressed against a rail-shaped stator and the elastic body is moved along the rail-shaped stator. It is about.

【0002】[0002]

【従来の技術】従来この種の振動波リニアモーターとし
ては、図5、図6に示すものがある。この振動波リニア
モーターは、長円形状の弾性体1の片面に圧電素子2を
接合し、また圧電素子2とは反対側の駆動面側に櫛歯形
状の突起(不図示)を進行波の進行方向に沿って多数隔
設したものを振動子とし、該突起の先端にはシート状の
耐摩耗材18がエポキシ系接着剤などにより接合されて
いる。
2. Description of the Related Art Conventionally, vibration-wave linear motors of this type are shown in FIGS. In this vibration wave linear motor, a piezoelectric element 2 is bonded to one surface of an elliptic elastic body 1, and a comb-shaped projection (not shown) is formed on a drive surface side opposite to the piezoelectric element 2 to form a traveling wave. A plurality of vibrators are arranged along the traveling direction, and a sheet-shaped wear-resistant material 18 is bonded to the tip of the protrusion by an epoxy adhesive or the like.

【0003】弾性体1の摺動面側直線部には、図5に示
す様な支持板6がスポット溶接等の接合手段により接合
されており、図中右側に位置する、例えばプリンタ装置
として使用する場合には印字ヘッドを搭載するための載
置台4から該弾性体1に向けて突出する支持部材7の端
部がこの支持板6に取りつけられ、載置台4と振動子と
が一体に組み付けられている。また載置台4と弾性体1
との間には、図6の(b)に示すように支持部材7から
延びる板状の加圧バネ3が設けられている。この加圧バ
ネ3の先端部は、フェルト等の振動絶縁体5及びステン
レス等の加圧板19を介して弾性体1の片面側に当接
し、加圧バネ3のバネ力により、駆動に供する弾性体1
の直線駆動部を後記するレール状固定子8のフランジ状
に形成されたレール部8aに押圧している。
A supporting plate 6 as shown in FIG. 5 is joined to the linear portion on the sliding surface side of the elastic body 1 by a joining means such as spot welding, and is used on the right side in the figure, for example, as a printer device. In this case, the end of the supporting member 7 projecting from the mounting table 4 for mounting the print head toward the elastic body 1 is attached to the supporting plate 6, and the mounting table 4 and the vibrator are integrally assembled. Has been. Further, the mounting table 4 and the elastic body 1
A plate-shaped pressure spring 3 extending from the support member 7 is provided between the and, as shown in FIG. The tip end of the pressure spring 3 abuts on one surface side of the elastic body 1 via the vibration insulator 5 such as felt and the pressure plate 19 such as stainless steel, and the elastic force of the pressure spring 3 provides elasticity for driving. Body 1
The linear drive part is pressed against a rail part 8a formed in a flange shape of a rail-shaped stator 8 described later.

【0004】レール状固定子8は、弾性体1の直線駆動
部が接触する為の適度な弾性を有するレール部8aと、
このレール部8aと対向し、このレール部8aよりも剛
性が高くなる様に構成されたガイドレール部8bとが形
成されている。
The rail-shaped stator 8 has a rail portion 8a having a proper elasticity for contacting the linear drive portion of the elastic body 1,
A guide rail portion 8b is formed facing the rail portion 8a and having a rigidity higher than that of the rail portion 8a.

【0005】このレール状固定子8の下面には、軸棒1
1を支持する軸棒支持板13a,13bが不図示の位置
決めピン等により正確な位置に取付けられており、軸棒
11がレール状固定子のガイドレール部8bと平行にな
る様にしている。また、軸棒11はスラスト方向に外れ
ないように不図示の軸棒止め具で軸棒支持板13a,1
3bに固定されている。
On the lower surface of the rail-shaped stator 8, the shaft rod 1
The shaft rod support plates 13a and 13b for supporting the shaft 1 are mounted at accurate positions by positioning pins or the like (not shown) so that the shaft rod 11 is parallel to the guide rail portion 8b of the rail-shaped stator. Further, the shaft rod 11 is secured by a shaft rod stopper (not shown) so as not to come off in the thrust direction.
It is fixed to 3b.

【0006】図5に示す様に載置台4からは、移動方向
の前後に、該軸棒11に向けて折曲片4a,4bが形成
され、折曲片4aには樹脂系又は含油メタルなどの丸長
穴形状のすべり軸受12aが取付けられ、折曲片4bに
は丸穴形状の軸受12bが取り付けられ、これらの軸受
12a,12bに軸棒11が挿通され、載置台4が予定
移動方向であるAY 方向に移動自在で、かつAz 方向に
は軸受12a及び12bによりガタなく拘束されてい
る。
As shown in FIG. 5, bent pieces 4a and 4b are formed from the mounting table 4 toward the shaft rod 11 in the front and rear of the moving direction. The bent pieces 4a are made of resin or oil-impregnated metal. The round oblong slide bearing 12a is attached, the bent piece 4b is attached with the round hole bearing 12b, the shaft rod 11 is inserted into these bearings 12a and 12b, and the mounting table 4 is moved in the planned movement direction. Is movable in the A Y direction and is restrained in the A z direction by the bearings 12a and 12b without backlash.

【0007】一方、載置台4には2本の軸棒15a,1
5bが取りつけられており、この先端にはガイドレール
部8bの内側面に当接するコロ軸受14a,14bが回
転自在に取り付けられ、バネ3により弾性体1をレール
状固定子8に押圧した反力を載置台4、コロ軸15を介
してコロ軸受14a,14bが受ける構造になってい
る。
On the other hand, the mounting table 4 has two shaft rods 15a, 1
5b is attached, and roller bearings 14a, 14b that abut against the inner surface of the guide rail portion 8b are rotatably attached to the tip of this, and the reaction force that presses the elastic body 1 against the rail-shaped stator 8 by the spring 3 is attached. The roller bearings 14a and 14b are structured so as to receive them via the mounting table 4 and the roller shaft 15.

【0008】この様に、載置台4には、加圧バネ3によ
り振動子を押圧する反力がC方向に付勢されるので、A
x 方向には、コロ軸受14a,14b及びすべり軸受1
2bの3点で自由度を拘束することになる。そのため、
レール状固定子8と軸棒11との取付精度が悪く両者の
平行度が悪くなったり軸棒11が曲っていても、丸長穴
形状の軸受12aが長穴方向のAx 方向に自由なため、
転がり軸受とすべり軸受とがせり合って軸受抵抗を増大
させることもなく、スムーズに載置台4がAY方向に移
動可能となる。
As described above, since a reaction force for pressing the vibrator is applied to the mounting table 4 in the C direction by the pressure spring 3, A
In the x direction, the roller bearings 14a and 14b and the slide bearing 1
The degree of freedom is restricted by the three points 2b. for that reason,
Even if the mounting accuracy of the rail-shaped stator 8 and the shaft rod 11 is poor and the parallelism between the two is poor, or the shaft rod 11 is bent, the round oblong hole-shaped bearing 12a can freely move in the A x direction of the oblong hole direction. For,
The rolling table and the sliding bearing do not interfere with each other to increase the bearing resistance, and the mounting table 4 can be smoothly moved in the A Y direction.

【0009】また、レール状固定子8に取り付けられた
軸棒支持板13a,13bの一部には板バネ(不図示)
によって、適度な張力を与えられたスリット板17が取
り付けられる。スリット板17には予定移動方向AY
沿って所定ピッチで予定移動方向AY と直交するAX
向に開口部17aが形成されている。また底板21の一
部には、載置台4の方向へ向けて突出する突起21aが
設けられている。更に載置台4には、スリット板17、
突起21aを含む位置に位置検出センサー31と基準位
置検出センサー30が設けられ、それぞれのセンサーに
は不図示の給電及び信号取り出し用配線が制御回路へ接
続されている。
A leaf spring (not shown) is provided on a part of the shaft rod support plates 13a and 13b attached to the rail-shaped stator 8.
The slit plate 17 to which an appropriate tension has been applied is attached by. Opening 17a in the A X direction perpendicular to the planned moving direction A Y at a predetermined pitch along the planned moving direction A Y in the slit plate 17 is formed. Further, a projection 21 a that projects toward the mounting table 4 is provided on a part of the bottom plate 21. Further, on the mounting table 4, a slit plate 17,
A position detection sensor 31 and a reference position detection sensor 30 are provided at positions including the protrusion 21a, and power supply and signal extraction wiring (not shown) is connected to the control circuit for each sensor.

【0010】次に上記した構成の振動波リニアモーター
の動作を説明する。
Next, the operation of the vibration wave linear motor having the above-described structure will be described.

【0011】不図示の電源から圧電素子2に高周波電界
を印加すると弾性体1に進行性振動波が励振され、弾性
体1とレール状固定子8との摩擦力により弾性体1と載
置台4及び載置台4に取り付けられた部材(3,5,
6,7,12,14,15,16,18,19)はレー
ル状固定子8に設けられたガイドレール部8b及びレー
ル状固定子8に取り付けられた軸棒11に沿ってAY
向へ移動する。この時コロ軸受14a,14bは弾性体
1の加圧反力によりレール状固定子8のガイドレール部
8bに押し付けられ、該ガイドレール部8b上を転がる
ので、載置台4の軸棒11回りの回転自由度が拘束され
る為、載置台4はAY 方向以外の移動自由度を拘束され
る事になり、AY 方向へスムーズに移動が可能となる。
When a high frequency electric field is applied to the piezoelectric element 2 from a power source (not shown), a progressive vibration wave is excited in the elastic body 1, and the elastic body 1 and the mounting table 4 are caused by the frictional force between the elastic body 1 and the rail-shaped stator 8. And members (3, 5, 5 attached to the mounting table 4
6, 7, 12, 14, 15, 15, 16, 18, 19) along the guide rail portion 8b provided on the rail-shaped stator 8 and the shaft rod 11 attached to the rail-shaped stator 8 in the A Y direction. Moving. At this time, the roller bearings 14a and 14b are pressed against the guide rail portion 8b of the rail-shaped stator 8 by the pressure reaction force of the elastic body 1 and roll on the guide rail portion 8b. since rotational freedom is constrained, placing table 4 is made to be bound to freedom of movement than a Y-direction, it is possible to move smoothly to the a Y-direction.

【0012】この時、図4に示すように、載置台4に設
けられたフォトセンサからなる基準位置検知センサー3
0には底板21の突起21aを通過する際、その形状に
応じた信号が発生し、制御回路32にて基準位置として
認識される。同様に載置台4に設けられたフォトセンサ
からなる位置検出センサー31にもスリット板17の開
口17aの形状に応じた信号が発生し制御回路32に
て、位置検出が行なわれ、位置制御、移動速度制御が行
なわれる。
At this time, as shown in FIG. 4, a reference position detecting sensor 3 formed of a photo sensor provided on the mounting table 4 is provided.
When passing through the projection 21a of the bottom plate 21 at 0, a signal corresponding to the shape is generated and recognized by the control circuit 32 as the reference position. Similarly, a signal corresponding to the shape of the opening 17a of the slit plate 17 is also generated in the position detection sensor 31, which is a photo sensor provided on the mounting table 4, and the control circuit 32 performs position detection to perform position control and movement. Speed control is performed.

【0013】[0013]

【発明が解決しようとしている課題】しかしながら、上
記従来例では、載置台の位置を検出する為にエンコーダ
ーを構成する必要から、スリット板と基準位置検出用の
突起が別途必要であった。
However, in the above-mentioned conventional example, the slit plate and the projection for detecting the reference position are separately required because the encoder is required to detect the position of the mounting table.

【0014】従って上記構成を達成するには、それらの
部品を取り付けるスペースを確保しなければならず、モ
ーターの小型化が難しかった。
Therefore, in order to achieve the above structure, it is necessary to secure a space for mounting those parts, and it is difficult to downsize the motor.

【0015】また、それぞれが別の部品として構成され
る事から、誤差が積み重なり、精度の低下を招き、部品
コスト、組立・調整のコストの上昇につながってしまっ
た。本発明の目的は、位置および速度制御の高精度化を
可能とし、省スペースによる装置の小型化、部品点数の
削減によるコストの低減を図ることができる振動波リニ
アモーターを提供することにある。
Further, since each of them is constructed as a separate component, errors are accumulated, resulting in a decrease in accuracy and an increase in component cost and assembly / adjustment cost. An object of the present invention is to provide a vibration wave linear motor that enables highly accurate position and speed control, can reduce the size of the device by saving space, and can reduce the cost by reducing the number of parts.

【0016】[0016]

【課題を解決するための手段および作用】本発明の目的
を実現する構成は特許請求の範囲に記載した通りであ
り、具体的には、載置台の移動を拘束するレール状固定
子のガイドレール部に、長さ方向(予定移動方向)に沿
ってその頂部に等間隔のスリットを形成して構成される
規則パターン部と、該規則パターン部8cの下部側に基
準位置を示すための1つの開口孔部からなる不規則パタ
ーン部を形成し、そして、載置台には規則パターン部を
挟むようにして投・受光素子からなる位置検出センサー
を設けると共に、不規則パターン部を挟むようにして投
・受光素子からなる基準位置検出センサーを設け、これ
らセンサーからの信号を駆動制御回路に出力する。
The structure for achieving the object of the present invention is as set forth in the claims. Specifically, the guide rail of the rail-shaped stator for restraining the movement of the mounting table. A regular pattern portion formed by forming slits at equal intervals along the length direction (scheduled movement direction), and one for indicating the reference position on the lower side of the regular pattern portion 8c. An irregular pattern part consisting of aperture holes is formed, and the mounting table is provided with a position detection sensor consisting of a light emitting / receiving element so as to sandwich the regular pattern part, and a light emitting / receiving element is sandwiched so as to sandwich the irregular pattern part. The following reference position detection sensors are provided, and signals from these sensors are output to the drive control circuit.

【0017】[0017]

【実施例】図1に本発明による第1の実施例を示す。FIG. 1 shows a first embodiment according to the present invention.

【0018】本実施例における振動子は、図5に示す従
来例と同様に、長円形状の弾性体1の片面に圧電素子2
が接合され、また圧電素子2とは反対側の駆動面側には
櫛歯形状の突起(不図示)を進行波の進行方向に沿って
多数隔設しており、その先端にはシート状の耐摩耗材1
8がエポキシ系接着剤などにより接合されている。
In the vibrator of this embodiment, as in the conventional example shown in FIG. 5, the piezoelectric element 2 is formed on one surface of the oblong elastic body 1.
Are joined together, and a large number of comb-shaped projections (not shown) are provided along the traveling direction of the traveling wave on the side of the driving surface opposite to the piezoelectric element 2. Wear resistant material 1
8 are joined by an epoxy adhesive or the like.

【0019】弾性体1の摺動面側直線部には、図1に示
す様な支持板6がスポット溶接等の接合手段により接合
されており、右側に位置する載置台4から左方に出され
た支持部材7の端部がこの支持板6に取りつけられ、載
置台4と振動子とが一体に組み付けられている。また載
置台4と弾性体1との間には、板状の加圧バネ3が図3
(b)の様に取り付けられ、加圧バネ3の先端部と弾性
体1との間に介装したフェルト等の振動絶縁体5及びス
テンレス等の加圧板19を介して加圧バネ3のバネ力に
より、駆動に供する弾性体1の直線駆動部を後記するレ
ール状固定子8のレール部8aに押圧している。
A support plate 6 as shown in FIG. 1 is joined to the linear portion on the sliding surface side of the elastic body 1 by a joining means such as spot welding, so that it is projected to the left from the mounting table 4 located on the right side. The end portion of the formed support member 7 is attached to the support plate 6, and the mounting table 4 and the vibrator are integrally assembled. A plate-shaped pressure spring 3 is provided between the mounting table 4 and the elastic body 1 as shown in FIG.
The spring of the pressure spring 3 is mounted through the vibration insulator 5 such as felt and the pressure plate 19 such as stainless steel, which is attached between the tip of the pressure spring 3 and the elastic body 1 as shown in FIG. By force, the linear drive portion of the elastic body 1 used for driving is pressed against a rail portion 8a of a rail-shaped stator 8 described later.

【0020】本実施例のレール状固定子は、弾性体1の
直線部が接触する為、適度な弾性を有するレール部8a
と、このレール部8aと対向し、該レール部8aよりも
剛性が高くなる様に構成されたガイドレール部8bとが
形成されている。
In the rail-shaped stator of this embodiment, since the linear portion of the elastic body 1 contacts, the rail portion 8a having a proper elasticity.
And a guide rail portion 8b facing the rail portion 8a and having a rigidity higher than that of the rail portion 8a.

【0021】このレール状固定子8の下面には、軸棒1
1を支持する軸棒支持板13a,13bが不図示の位置
決めピン等により正確な位置に取付けられており、軸棒
11がレール状固定子8のガイドレール部8bと平行に
なる様にしている。また、軸棒11はスラスト方向に外
れないように不図示の軸棒止め具で軸棒支持板13a,
13bに固定されている。
On the lower surface of the rail-shaped stator 8, the shaft rod 1
Shaft rod support plates 13a and 13b for supporting 1 are mounted at accurate positions by positioning pins or the like (not shown) so that the shaft rod 11 is parallel to the guide rail portion 8b of the rail-shaped stator 8. . Further, the shaft rod 11 is secured by a shaft rod stopper (not shown) so as not to come off in the thrust direction.
It is fixed to 13b.

【0022】図3に示す様に載置台4からは、図中左方
に2ケ所突出した部材が設けられ、ここに樹脂系又は含
油メタルなどの丸長穴形状のすべり軸受部材12a及び
丸穴形状の軸受12bが取付けられており、載置台4が
Y 方向に移動自在で、かつAz 方向には軸受12a及
び12bによりガタなく拘束されている。
As shown in FIG. 3, the mounting table 4 is provided with two members projecting to the left in the figure, and a sliding bearing member 12a and a round hole having a round oblong hole shape such as resin or oil-impregnated metal are provided there. A bearing 12b having a shape is attached, the mounting table 4 is movable in the A Y direction, and is restrained in the A z direction by the bearings 12a and 12b without backlash.

【0023】一方、載置台4には2本の軸棒15a,1
5bが取りつけられており、この先端にはコロ軸受14
a,14bが回転自在に取り付けられ、バネ3により弾
性体1を押圧した反力を載置台4、コロ軸15を介して
コロ軸受14が受ける構造になっている。
On the other hand, the mounting table 4 has two shaft rods 15a, 1
5b is attached, and a roller bearing 14 is attached to the tip of this.
a and 14b are rotatably attached, and the roller bearing 14 receives the reaction force of pressing the elastic body 1 by the spring 3 via the mounting table 4 and the roller shaft 15.

【0024】この様に、載置台4には、加圧バネ3によ
り振動子を押圧する反力がC方向に付勢されるので、A
x 方向には、コロ軸受14a,14b及びすべり軸受1
2bの3点で自由度を拘束することになる。そのため、
レール状固定子8と軸棒11との取付精度が悪く、両者
の平行度が悪くなったり軸棒11が曲っていても、軸受
12aがAx 方向に自由なため、転がり軸受とすべり軸
受とが競り合って軸受抵抗を増大させることなくスムー
ズに載置台4がAY 方向に移動可能となる。
In this way, the mounting table 4 is urged in the direction C by the reaction force for pressing the vibrator by the pressure spring 3, so that A
In the x direction, the roller bearings 14a and 14b and the slide bearing 1
The degree of freedom is restricted by the three points 2b. for that reason,
Even if the mounting accuracy of the rail-shaped stator 8 and the shaft rod 11 is poor and the parallelism between the two is poor or the shaft rod 11 is bent, the bearing 12a is free in the A x direction, so that it can be used as a rolling bearing and a sliding bearing. Can be smoothly moved in the A Y direction without competing with each other to increase the bearing resistance.

【0025】一方レール状固定子8のガイドレール部8
bには、長さ方向(予定移動方向)に沿ってその頂部に
等間隔のスリットを形成して構成される規則パターン部
8cと、該規則パターン部8cの下部側に基準位置を示
すための1つの開口孔部からなる不規則パターン部8d
が形成されている。そして、載置台4には規則パターン
部8cを挟むようにして投・受光素子からなる位置検出
センサー31が設けられると共に、不規則パターン部8
dを挟むようにして投・受光素子からなる基準位置検出
センサー30が設けられ、これらセンサー30,31か
らの信号が図4に示すように制御回路32に出力され
る。
On the other hand, the guide rail portion 8 of the rail-shaped stator 8
In b, a regular pattern portion 8c formed by forming slits at equal intervals along the length direction (scheduled movement direction), and a regular position for indicating a reference position on the lower side of the regular pattern portion 8c. Irregular pattern part 8d consisting of one opening hole
Are formed. The mounting table 4 is provided with a position detection sensor 31 including a light emitting / receiving element so as to sandwich the regular pattern portion 8c, and the irregular pattern portion 8 is provided.
A reference position detection sensor 30 including a light emitting / receiving element is provided so as to sandwich d, and signals from these sensors 30 and 31 are output to a control circuit 32 as shown in FIG.

【0026】このように構成した位置検出機構は、(不
図示)のメイン電源が投入されると、制御回路32によ
って載置台4がレール状固定子8の不規則パターン8d
を通過すると、基準位置検出センサー30からはデジタ
ル信号に変換すると図4に示すように1パルス分のパル
ス信号を出力し、基準位置の認識が行われる。またレー
ル状固定子8の規則パターン部8cを位置検出センサー
31が通過して得られるデジタル変換された信号は図4
に示すように規則パターン部8cのスリットに合わせた
等間隔のパルス波形となり、このパルス数をカウントと
することで載置台4の移動速度制御が行われ、また該基
準位置に対しての加減算によって載置台4の位置検出を
行う。
In the position detecting mechanism constructed in this manner, when the main power source (not shown) is turned on, the mounting circuit 4 causes the mounting table 4 to have the irregular pattern 8d of the rail-shaped stator 8 by the control circuit 32.
After passing through, the reference position detection sensor 30 outputs a pulse signal for one pulse when converted into a digital signal, and the reference position is recognized. Further, the digitally converted signal obtained by passing the position detection sensor 31 through the regular pattern portion 8c of the rail-shaped stator 8 is shown in FIG.
As shown in FIG. 4, the pulse waveform has an equal interval matched with the slit of the regular pattern portion 8c, and the moving speed of the mounting table 4 is controlled by counting the number of pulses, and addition / subtraction is performed with respect to the reference position. The position of the mounting table 4 is detected.

【0027】すなわち、位置検出や速度検出等の基準と
なる不規則パターン8dと、位置検出や速度検出のため
に用いられる規則パターン8cとは同じ部材であるレー
ル状固定子8に一体に形成されているので、部品点数の
削減化、装置の小型化、精度の向上が図れる。
That is, the irregular pattern 8d serving as a reference for position detection and speed detection and the regular pattern 8c used for position detection and speed detection are integrally formed on the rail-shaped stator 8 which is the same member. Therefore, it is possible to reduce the number of parts, downsize the device, and improve the accuracy.

【0028】なお、上記した実施例では、レール状固定
子8のガイドレール部8bに櫛歯状のスリットで規則パ
ターン部8cを、また開口孔部により不規則パターン部
8dを形成しているが、これらの方法に変えて、印刷に
より白黒のパターンを形成し、反射型のフォトカップラ
ー等で検出したり、エッチングにより形成した凹凸をレ
ーザー光の反射等で検出したり、あるいはNSに着磁し
たパターンをMR素子等で検出する方法であっても良
く、さらにパターンを形成する場所もレール状固定子の
他の箇所であっても良い。
In the above embodiment, the guide rail portion 8b of the rail-shaped stator 8 has the regular pattern portion 8c formed by the comb-like slits and the irregular pattern portion 8d formed by the opening hole. Instead of these methods, a black-and-white pattern is formed by printing, and it is detected by a reflection type photocoupler or the like, unevenness formed by etching is detected by reflection of laser light, or the NS is magnetized. The pattern may be detected by an MR element or the like, and the place where the pattern is formed may be another place of the rail-shaped stator.

【0029】[0029]

【発明の効果】以上説明したように本発明によれば、レ
ール状固定子の一部に位置読み取り用パターンを形成し
エンコーダー機能を持たせる事で、従来別体構造となっ
ていたエンコーダフィルム及びその取付部材が不要にな
る。従って、省スペースが計られ、装置の小型化が可能
になるのと同時に製造コストの低減も可能にするもので
ある。
As described above, according to the present invention, by forming a position reading pattern on a part of the rail-shaped stator to provide an encoder function, the encoder film and the encoder film, which have conventionally been provided as separate structures, The mounting member becomes unnecessary. Therefore, it is possible to save space, reduce the size of the apparatus, and reduce the manufacturing cost.

【0030】また上記位置読み取りパターンに規則的パ
ターンだけでなく不規則パターンも設ける事で基準位置
が検出でき、従来別構造であった位置検出手段が不要に
なり小型化、低コスト化が可能となるのと同時に一体構
造の為に精度もアップする。
Further, by providing not only a regular pattern but also an irregular pattern in the position reading pattern, the reference position can be detected, and the position detecting means, which has a different structure in the past, is not required, and the size and cost can be reduced. At the same time, the accuracy is improved due to the integrated structure.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1の実施例を示す斜視図。FIG. 1 is a perspective view showing a first embodiment of the present invention.

【図2】図1の要部拡大斜視図。FIG. 2 is an enlarged perspective view of a main part of FIG.

【図3】図1の断面図。FIG. 3 is a sectional view of FIG.

【図4】振動波リニアモーターの駆動制御系のブロック
図。
FIG. 4 is a block diagram of a drive control system of a vibration wave linear motor.

【図5】従来の振動波リニアモーターの斜視図。FIG. 5 is a perspective view of a conventional vibration wave linear motor.

【図6】図5の断面図。6 is a sectional view of FIG.

【符号の説明】[Explanation of symbols]

1…弾性体 2…圧電素子 3…加圧バネ 4…載置台 5…振動絶縁体 6…弾性体支持板 7…支持体 8…レール状固定
子 11…軸棒 12…すべり軸受 13a,13b…軸棒支持板 14a,14b…
ころ軸受 15…コロ軸 16…コロ軸受抜
け止め 17…スリット板 18…振動子摩擦
材 20…底板 30…基準位置セ
ンサー 31…位置検出センサー 32…制御回路
DESCRIPTION OF SYMBOLS 1 ... Elastic body 2 ... Piezoelectric element 3 ... Pressing spring 4 ... Mounting table 5 ... Vibration insulator 6 ... Elastic body support plate 7 ... Support body 8 ... Rail-shaped stator 11 ... Shaft rod 12 ... Sliding bearing 13a, 13b ... Shaft rod support plates 14a, 14b ...
Roller bearing 15 ... Roller shaft 16 ... Roller bearing retainer 17 ... Slit plate 18 ... Oscillator friction material 20 ... Bottom plate 30 ... Reference position sensor 31 ... Position detection sensor 32 ... Control circuit

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ループ形状に形成された振動弾性体に電
気−機械エネルギー変換素子を接合し、該電気−機械エ
ネルギー変換素子に駆動用信号を印加することにより該
振動弾性体の駆動面に進行性振動波を形成する振動子
と、該振動子における振動弾性体の駆動面に接触するレ
ール状固定子と、該振動子に取り付けられて該振動子と
共に該レール状固定子に沿って移動する移動体と、該振
動子を該レール状固定子に押圧する加圧手段と、該移動
体を予定の移動方向に沿って案内する案内手段とを有
し、該振動子の駆動によって該移動体を該レール状固定
子に沿った予定移動方向に移動させる振動波リニアモー
ターにおいて、 該レール状固定子の一部にその長さ方向に沿って連続的
パターンからなる位置読取部を形成し、該移動体に該位
置読取部を検出する検出手段を設けたことを特徴とする
振動波リニアモーター。
1. An electro-mechanical energy conversion element is joined to a vibration elastic body formed in a loop shape, and a drive signal is applied to the electro-mechanical energy conversion element to advance to the drive surface of the vibration elastic body. Oscillator that forms a sex vibration wave, a rail-shaped stator that comes into contact with the driving surface of a vibrating elastic body of the oscillator, and is attached to the oscillator and moves along with the oscillator along the rail-shaped stator. The moving body includes a moving body, a pressing unit that presses the vibrator against the rail-shaped stator, and a guide unit that guides the moving body in a predetermined moving direction. In a vibration wave linear motor for moving the rail-shaped stator in a predetermined movement direction along the rail-shaped stator, a position reading unit formed of a continuous pattern is formed on a part of the rail-shaped stator along the length direction thereof, Read the position on the moving body Vibration wave linear motor, characterized in that a detecting means for detecting a.
【請求項2】 請求項1において、レール状固定子に形
成されるパターンが規則的パターン部と不規則パターン
部であることを特徴とする振動波リニアモーター。
2. The vibration wave linear motor according to claim 1, wherein the pattern formed on the rail-shaped stator is a regular pattern portion and an irregular pattern portion.
JP5248027A 1993-10-04 1993-10-04 Vibration wave linear motor Pending JPH07107759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5248027A JPH07107759A (en) 1993-10-04 1993-10-04 Vibration wave linear motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5248027A JPH07107759A (en) 1993-10-04 1993-10-04 Vibration wave linear motor

Publications (1)

Publication Number Publication Date
JPH07107759A true JPH07107759A (en) 1995-04-21

Family

ID=17172119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5248027A Pending JPH07107759A (en) 1993-10-04 1993-10-04 Vibration wave linear motor

Country Status (1)

Country Link
JP (1) JPH07107759A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102904480A (en) * 2012-11-05 2013-01-30 哈尔滨工业大学 Sandwich type square frame ultrasonic motor vibrator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102904480A (en) * 2012-11-05 2013-01-30 哈尔滨工业大学 Sandwich type square frame ultrasonic motor vibrator

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