JP2014088681A - Automatic opening and closing door - Google Patents

Automatic opening and closing door Download PDF

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JP2014088681A
JP2014088681A JP2012238169A JP2012238169A JP2014088681A JP 2014088681 A JP2014088681 A JP 2014088681A JP 2012238169 A JP2012238169 A JP 2012238169A JP 2012238169 A JP2012238169 A JP 2012238169A JP 2014088681 A JP2014088681 A JP 2014088681A
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piezoelectric vibrator
door
ultrasonic motor
fixed
vibration
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Masayuki Ishida
真之 石田
Mikio Takimoto
幹夫 滝本
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Nikko Co Ltd
Nikko KK
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Nikko Co Ltd
Nikko KK
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Abstract

PROBLEM TO BE SOLVED: To provide an automatic opening and closing door in which a push-in pressure of an ultrasonic motor is constant, and which makes an emergency stop when a load more than its thrust is applied thereto to secure operational stability and safety.SOLUTION: An automatic opening and closing door includes: wheels 6 which are connected to an upper part of a door body part 1; a wheel rolling path which is provided on a stationary wall side and in which the wheels roll; and a door drive device which moves the door body part along the wheel rolling path. The door drive device comprises: an ultrasonic motor 9 fixed to the stationary wall; a friction slide plate 8 connected to an upper part of the door body part, and arranged so as to come into contact with a piezoelectric vibrator output end 11 of the ultrasonic motor; and a drive control part of the ultrasonic motor, of which thrust is set such that the piezoelectric vibrator output end to the friction slide plate of the door body part slips by a constant or more load. The ultrasonic motor has an electrode arrangement structure independently exciting longitudinal vibration and bending vibration and is fixed to the stationary wall so as to make a push-in pressure of the piezoelectric vibrator output end constant.

Description

本発明は、超音波モータを用いた自動開閉扉、特に、一定推力以上の負荷がかかったときに扉の移動動作が停止するように安全性を備えた自動開閉扉に関する。   The present invention relates to an automatic opening / closing door using an ultrasonic motor, and more particularly to an automatic opening / closing door having safety so that the moving operation of the door stops when a load exceeding a certain thrust is applied.

自動開閉扉としては従来から電磁モータを用いたものが知られているが、この形態のものは減速機やベルト、歯車等の伝動機構部が必須となり、装置全体が大がかりになるという問題があった。これを解決するため、電磁モータの代わりに超音波モータを用いた自動扉が開示されている。この超音波モータには圧電振動子の動作を回転動作に変換して出力する回転型超音波モータと、振動子の出力を直接直線運動として取り出す直動式、いわゆるリニア型超音波モータとがあり、いずれも電磁モータのものと比べて構造をコンパクトにでき、かつ消費電力も少ないという利点を有している。   Conventionally, automatic doors using electromagnetic motors have been known, but this type has a problem in that a transmission mechanism such as a speed reducer, a belt, a gear, etc. is essential, and the entire apparatus becomes large. It was. In order to solve this, an automatic door using an ultrasonic motor instead of an electromagnetic motor is disclosed. There are two types of ultrasonic motors: a rotary ultrasonic motor that converts the operation of a piezoelectric vibrator into a rotary operation and outputs it, and a direct-acting type that extracts the output of the vibrator directly as a linear motion, a so-called linear ultrasonic motor. Both have the advantages that the structure can be made compact and the power consumption is small compared to that of the electromagnetic motor.

前記リニア型超音波モータを用いた電動扉として、特開平3−118781号公報(特許文献1)に示すように、床面に敷設したレールと扉の下端との間に扉下端に連結する形態で超音波モータを設け、前記超音波モータの付勢により該モータと一体で扉を走行させていく構造のものがある。この場合の超音波振動子は屈曲振動を励起する励振体(第1圧電体)と伸縮振動を励起する励振体(第2圧電体)が一体化され、両励振体の合成により略楕円振動を誘起し、これによって扉の走行駆動を行うものである。   As an electric door using the linear type ultrasonic motor, as shown in Japanese Patent Laid-Open No. 3-118781 (Patent Document 1), a mode in which the lower end of the door is connected between a rail laid on the floor and the lower end of the door. There is a structure in which an ultrasonic motor is provided and the door is caused to travel integrally with the motor by energizing the ultrasonic motor. In this case, the ultrasonic vibrator integrates an excitation body (first piezoelectric body) that excites bending vibration and an excitation body (second piezoelectric body) that excites expansion and contraction vibration. The door is driven to drive the door.

また、回転型の超音波モータを用いた電動扉の例としては、特開昭64−29593号公報(特許文献2)に示す走行駆動装置がある。これは、床面のレール上を転動する車輪を有する扉に対するものであり、前記車輪の車軸を該車輪に対面した超音波モータの縦振動子とねじり結合子を組み合せて縦振動とねじり振動により合成された楕円振動を生じさせ、これを超音波モータの車輪を軸支するロータ軸に伝動する構成である。前記ロータ軸は超音波モータの振動子出力端に連結されている。この場合、縦振動成分で前記ロータ軸に浮力を、ねじり振動成分で回転力を与えて前記ロータ軸の回転を生じさせるようにしている。なお、超音波モータの圧電振動子に関連したものとしては、本出願人らによる特許第4802313号公報(特許文献3)、特許第4830165号公報(特許文献4)及び特許第4892661号公報(特許文献5)に示すものがある。   As an example of an electric door using a rotary ultrasonic motor, there is a traveling drive device disclosed in Japanese Patent Application Laid-Open No. 64-29593 (Patent Document 2). This is for a door having a wheel that rolls on a rail on the floor surface, and a longitudinal vibration and a torsional vibration by combining a longitudinal vibrator and a torsional connector of an ultrasonic motor with the wheel axle facing the wheel. Is generated and transmitted to the rotor shaft that supports the wheels of the ultrasonic motor. The rotor shaft is connected to the transducer output end of the ultrasonic motor. In this case, the rotor shaft is rotated by applying buoyancy to the rotor shaft by the longitudinal vibration component and rotational force by the torsional vibration component. In addition, as a thing relevant to the piezoelectric vibrator of an ultrasonic motor, the patent 4802313 (patent document 3) by the present applicants, patent 4830165 (patent document 4), and patent 4926661 (patent) There is what is shown in literature 5).

特開平3−118781号公報Japanese Patent Laid-Open No. 3-118781 特開昭64−29593号公報JP-A 64-29593 特許第4802313号公報Japanese Patent No. 4802313 特許第4830165号公報Japanese Patent No. 4830165 特許第4892661号公報Japanese Patent No. 4892661

超音波モータによる自動扉には、扉と駆動部の組付け構造が簡素であることのほかに、扉の開閉動作がスムーズで安定していることが必要であり、さらに扉の閉止動作の途中で人や物が扉と壁枠との間に挟まった時などのように不慮の負荷が扉に作用したとき、即座に扉が停止、あるいは開き側へ退避動作するように安全性を備えていることが要求される。しかし、特許文献1、2の構成では、いずれも超音波モータが移動扉側に設けられているため、外部電源を前記扉を介して超音波モータ側へ伝える構造が複雑となり、また扉自体にも大きな構造変更の工事が必要となる。特に特許文献1では、レール上に超音波モータを挟んで扉を支える構造のため、前記扉の重量が大となると、超音波モータの保持機構にそれだけの強度、剛性が必要となり、スムーズな動きが確保しにくいという問題がある。また、この構造は、扉の開閉方向前後部に一対の超音波モータを設けているが、前記扉の微妙な傾きにより超音波モータの押し圧が一定にならず、前記扉の動きが不安定になる可能性がある。   In addition to the simple structure of the door and drive unit, the automatic door with an ultrasonic motor requires a smooth and stable door opening and closing operation. When an unexpected load is applied to the door, such as when a person or object is caught between the door and the wall frame, the door is immediately stopped or retracted to the open side. It is required to be. However, in the configurations of Patent Documents 1 and 2, since the ultrasonic motor is provided on the movable door side, the structure for transmitting the external power source to the ultrasonic motor side through the door becomes complicated, and the door itself However, major structural changes are required. In particular, Patent Document 1 has a structure that supports a door by sandwiching an ultrasonic motor on a rail. Therefore, when the weight of the door increases, the holding mechanism of the ultrasonic motor needs to have sufficient strength and rigidity, and smooth movement. There is a problem that it is difficult to secure. In addition, this structure is provided with a pair of ultrasonic motors in the front and rear direction of the door opening / closing direction, but the pressing force of the ultrasonic motor is not constant due to the slight inclination of the door, and the movement of the door is unstable. There is a possibility.

特許文献2の構造は、超音波モータの回転駆動力を扉の直線運動に変換する構成のため、超音波モータの進行波を直接自動扉の走行駆動力とするものに比べて効率が悪い。また、走行車輪の車軸に超音波モータを設ける構造のため、前記扉の板面方向の厚みが大となり、前記扉が大形かつ重量大となってしまうといった問題がある。さらに特許文献2では基本的に車輪走行形態の扉であるため、緊急停止時の惰性走行の問題があり、安全性に欠けるという問題があった。   Since the structure of Patent Document 2 is configured to convert the rotational driving force of the ultrasonic motor into the linear motion of the door, the efficiency is inferior compared to the structure in which the traveling wave of the ultrasonic motor is directly used as the driving force of the automatic door. Further, since the ultrasonic motor is provided on the axle of the traveling wheel, there is a problem that the thickness of the door in the plate surface direction becomes large, and the door becomes large and heavy. Further, in Patent Document 2, since the door is basically a wheel running form, there is a problem of coasting during an emergency stop and there is a problem of lack of safety.

本発明は、超音波モータの出力端の押込み圧が一定になるような構造とし、かつ前記扉の推力を自由に設定でき、これによって推力以上の負荷がかかった際に前記扉が緊急停止し、動作の安定性および安全性を確保した自動開閉扉を提供することを目的とする。   The present invention has a structure in which the pushing pressure at the output end of the ultrasonic motor is constant, and the thrust of the door can be freely set, so that when the load exceeding the thrust is applied, the door is stopped urgently. An object of the present invention is to provide an automatic door that ensures the stability and safety of operation.

本発明はまた、扉およびその駆動部の構造がきわめて簡素であり、仮に扉の傾きが多少あっても、安定した扉の開閉動作が可能であり、さらに効率のよい駆動形態をもつ自動開閉扉を提供することを目的とする。   The present invention also provides an automatic opening / closing door that has a very simple structure of the door and its driving part, and that can stably open and close the door even if the door is slightly inclined, and that has a more efficient driving form. The purpose is to provide.

本発明はさらに、超音波モータへの電源供給および配線関係が容易であり、既存の扉のごく簡単な対応工事で実施できる自動開閉扉を提供することを目的とするものである。   It is another object of the present invention to provide an automatic opening / closing door that is easy to supply power and wiring to an ultrasonic motor and can be implemented with a very simple construction work for an existing door.

本発明によれば、扉本体部の上部に連結された車輪と、固定壁側に設けられ、かつ前記車輪が転動する車輪転動路と、前記扉本体部を前記車輪転動路に沿って移動させる扉駆動装置とを有し、前記扉駆動装置は、前記固定壁に固定された超音波モータと、前記扉本体部の上部に連結され、かつ前記超音波モータの圧電振動子出力端と接触するように配置された摩擦摺動板と、一定以上の負荷で前記扉本体部の前記摩擦摺動板に対する前記圧電振動子出力端がスリップするように推力設定された前記超音波モータの駆動制御部とを有し、前記超音波モータは、縦振動と屈曲振動を独立して励振させる電極配置構造となっており、かつ前記圧電振動子出力端の押込み圧を一定にする保持装置によって前記固定壁に固定されることを特徴とする自動開閉扉が提供される。   According to the present invention, the wheel connected to the upper portion of the door main body, the wheel rolling path provided on the fixed wall side and rolling the wheel, and the door main body along the wheel rolling path. A door driving device for moving the ultrasonic motor, wherein the door driving device is connected to the ultrasonic motor fixed to the fixed wall, the upper portion of the door main body, and the piezoelectric vibrator output end of the ultrasonic motor. A friction sliding plate disposed so as to be in contact with the ultrasonic motor and a thrust set so that the piezoelectric vibrator output end of the door main body portion with respect to the friction sliding plate of the door main body portion slips at a certain load or more. The ultrasonic motor has an electrode arrangement structure for exciting longitudinal vibration and bending vibration independently, and a holding device that keeps the pushing pressure at the piezoelectric vibrator output end constant. Automatic fixed to the fixed wall Closing is provided.

本発明の1つの形態によれば、前記扉本体部は、前記車輪を介して前記固定壁側の前記車輪転動路に吊り下げられている。従来の扉を床面で支持し、扉の下部や扉下面に超音波モータを設けたものに比べて、扉の動きがスムーズであり、超音波モータ自体にも過大な荷重がかからない。   According to one form of this invention, the said door main-body part is suspended by the said wheel rolling path by the said fixed wall side via the said wheel. Compared with a conventional door that is supported by a floor and an ultrasonic motor is provided at the lower part of the door or the lower surface of the door, the door moves more smoothly and the ultrasonic motor itself is not subjected to an excessive load.

本発明の他の形態によれば、前記超音波モータの圧電振動子は、各々の長さが互いに等しい2枚の板ばねが、その板面を前記圧電振動子の加圧方向に互いに平行に離隔して配置され、前記板ばねの一端が前記圧電振動子の振動変位の小さい節部分の位置に固着され、かつ他端が支持部材に固定され、前記板ばねによって前記圧電振動子が加圧方向に弾性的に押圧された保持装置に保持されている。
この構造により、圧電振動子に一定の加圧力を付与することができ、安定した出力、推力を得ることができる。また振動エネルギーの損失、振動特性の変化が軽減できる。
According to another aspect of the present invention, the piezoelectric vibrator of the ultrasonic motor includes two leaf springs having the same length, and the plate surfaces thereof are parallel to the pressurizing direction of the piezoelectric vibrator. The leaf springs are spaced apart, one end of the leaf spring is fixed to the position of the node portion where the vibration displacement of the piezoelectric vibrator is small, and the other end is fixed to the support member, and the piezoelectric vibrator is pressurized by the leaf spring. The holding device is elastically pressed in the direction.
With this structure, a constant pressure can be applied to the piezoelectric vibrator, and stable output and thrust can be obtained. Moreover, loss of vibration energy and change in vibration characteristics can be reduced.

本発明のさらに他の形態によれば、前記超音波モータの圧電振動子は、各々の長さが互いに等しい2対(4枚)の板ばねが、その板面を前記圧電振動子の加圧方向に互いに平行に離隔して配置され、前記板ばねの一端が前記圧電振動子の振動変位の小さい節部分の位置に固着され、かつ他端が支持部材に固定され、前記板ばねによって前記圧電振動子が加圧方向に弾性的に押圧された保持装置に保持されている。
この構造により、圧電振動子に一定の加圧力を付与することができ、安定した出力、推力を得ることができる。また振動エネルギーの損失、振動特性の変化が軽減できる。
According to still another aspect of the present invention, the piezoelectric vibrator of the ultrasonic motor includes two pairs (four) of leaf springs having the same length, and the plate surface is pressed by the piezoelectric vibrator. The leaf springs are arranged in parallel with each other, one end of the leaf spring is fixed to a position of a node portion where the vibration displacement of the piezoelectric vibrator is small, and the other end is fixed to a support member. The vibrator is held by a holding device that is elastically pressed in the pressurizing direction.
With this structure, a constant pressure can be applied to the piezoelectric vibrator, and stable output and thrust can be obtained. Moreover, loss of vibration energy and change in vibration characteristics can be reduced.

本発明のさらに他の形態によれば、前記圧電振動子を離隔して収容する枠形または箱形の支持部材と、前記支持部材の側部と前記圧電振動子との間に介在される板ばね構造体とを有し、前記板ばね構造体は、前記支持部材の片側部に固着された基端部から前記圧電振動子の対向両側部を挟むように前記圧電振動子の前記側部をまたいで折り返されて該圧電振動子に固着された第1の板ばね部材と、前記支持部材の他方の片側部に固着された基端部から前記圧電振動子の前記対向両側部を挟むように前記圧電振動子の前記側部をまたいで折り返されて該圧電振動子に固着された第2の板ばね部材とを有し、前記第1の板ばね部材と前記第2の板ばね部材が前記圧電振動子との固着部分で一体化されている保持装置によって、前記超音波モータの圧電振動子が保持されている。
この構造により、圧電振動子に一定の加圧力を付与することができ、安定した出力、推力を得ることができる。また振動エネルギーの損失、振動特性の変化が軽減できる。超音波モータの押し圧が一定になることから、扉本体部に多少の傾きがあっても安定した開閉動作が確保できる。
According to still another aspect of the present invention, a frame-shaped or box-shaped support member that accommodates the piezoelectric vibrator separately, and a plate interposed between a side portion of the support member and the piezoelectric vibrator. A spring structure, and the leaf spring structure has the side portion of the piezoelectric vibrator sandwiched between opposite sides of the piezoelectric vibrator from a base end portion fixed to one side portion of the support member. A first leaf spring member folded back and fixed to the piezoelectric vibrator, and a base end portion fixed to the other one side of the support member so as to sandwich the opposite opposite side portions of the piezoelectric vibrator. A second leaf spring member that is folded across the side portion of the piezoelectric vibrator and is fixed to the piezoelectric vibrator, wherein the first leaf spring member and the second leaf spring member are By the holding device integrated with the fixed portion with the piezoelectric vibrator, the ultrasonic motor Electrostatic vibrator is held.
With this structure, a constant pressure can be applied to the piezoelectric vibrator, and stable output and thrust can be obtained. Moreover, loss of vibration energy and change in vibration characteristics can be reduced. Since the pressing force of the ultrasonic motor becomes constant, a stable opening / closing operation can be ensured even if the door body has a slight inclination.

本発明のさらに他の形態によれば、前記超音波モータの圧電振動子は、屈曲振動と伸縮振動をそれぞれ独立して励振するため、屈曲振動を励振する電極と伸縮振動を励振する電極が別々に設けられ、前記屈曲振動を励振する電極が、屈曲固有振動モードの歪みが所定の値以上となる領域に前記電極の外形曲線部材が前記歪みの等高線上に略沿うように配置されている。
このような圧電振動子とすることにより、振動子の温度上昇、発熱の原因となる振動子損失を小さくすることができる。さらに、電極の外形の一部を歪みの等高線にほぼ沿った曲線部を含む形状としたことにより、自動扉の作動の際の電圧印加時に発生する振動子の応力が減少し、応力集中によるモータの疲労亀裂や破損がなくなり、耐久性、信頼性の高い自動開閉扉とすることができる。
According to still another aspect of the present invention, since the piezoelectric vibrator of the ultrasonic motor excites the bending vibration and the stretching vibration independently, the electrodes for exciting the bending vibration and the electrodes for exciting the stretching vibration are separately provided. The electrode that excites the bending vibration is arranged in a region where the distortion in the bending natural vibration mode is equal to or greater than a predetermined value so that the contour member of the electrode is substantially along the contour line of the distortion.
By using such a piezoelectric vibrator, it is possible to reduce vibrator loss that causes a rise in temperature and heat generation of the vibrator. Furthermore, by forming a part of the outer shape of the electrode into a shape that includes a curved portion substantially along the contour line of the distortion, the stress of the vibrator generated when voltage is applied during the operation of the automatic door is reduced, and the motor due to stress concentration This eliminates fatigue cracks and breakage, and can be a durable and reliable automatic door.

本発明の自動開閉扉は、超音波モータを扉側ではなく、扉周囲の固定壁側に設けた構造であるため、超音波モータへの電源供給が簡素であり、また前記扉に推力以上の負荷がかかったときに前記扉の移動動作が停止するため、安全性が確保される。前記扉は吊下げ式に上端で支持するため、前記扉に多少の傾きなどが生じても安定でスムーズな開閉動作がなされる。さらに扉側には摩擦摺動板を設けるだけでよいため、既存の扉に対して大きな改変工事が不要である。   The automatic opening / closing door of the present invention has a structure in which an ultrasonic motor is provided not on the door side but on the fixed wall side around the door, so that the power supply to the ultrasonic motor is simple, and the door is more than thrust. Since the movement operation of the door stops when a load is applied, safety is ensured. Since the door is supported at the upper end in a suspended manner, a stable and smooth opening / closing operation can be performed even if the door is slightly inclined. Furthermore, since it is only necessary to provide a friction sliding plate on the door side, no major modification work is required for the existing door.

本発明の実施例に係る自動開閉扉の全体正面図である。1 is an overall front view of an automatic door according to an embodiment of the present invention. 図1に示す自動開閉扉の上部の拡大側部断面図である。FIG. 2 is an enlarged side sectional view of an upper part of the automatic opening / closing door shown in FIG. 1. 本発明の実施例に係る自動開閉扉の超音波モータの圧電振動体の保持機構の一例を示す図である。It is a figure which shows an example of the holding mechanism of the piezoelectric vibrating body of the ultrasonic motor of the automatic door which concerns on the Example of this invention. 図3に示す保持機構の圧電振動子押込み時の状態を示す図である。It is a figure which shows the state at the time of pushing in the piezoelectric vibrator of the holding mechanism shown in FIG. 本発明の実施例に係る自動開閉扉の超音波モータの圧電振動体の保持機構の他の例を示す図である。It is a figure which shows the other example of the holding mechanism of the piezoelectric vibrating body of the ultrasonic motor of the automatic door which concerns on the Example of this invention. 本発明の実施例に係る自動開閉扉の超音波モータの圧電振動体の保持機構の他の例を示す図であり、同図(a)は押込み動作前の状態を示し、同図(b)は圧電振動子の押込み時の状態を示す図である。It is a figure which shows the other example of the holding mechanism of the piezoelectric vibrating body of the ultrasonic motor of the automatic door which concerns on the Example of this invention, The figure (a) shows the state before pushing operation | movement, The figure (b) FIG. 4 is a diagram showing a state when the piezoelectric vibrator is pushed. 圧電振動子の振動形態を模型的に示した図である。It is the figure which showed the vibration form of the piezoelectric vibrator typically. 本発明の実施例に係る自動開閉扉に採用される矩形状圧電振動子の保持装置の断面図である。It is sectional drawing of the holding | maintenance apparatus of the rectangular-shaped piezoelectric vibrator employ | adopted as the automatic door which concerns on the Example of this invention. 図8に示す矩形状圧電振動子の保持装置の支持部材を除いた状態の斜視図である。It is a perspective view of the state which removed the support member of the holding apparatus of the rectangular piezoelectric vibrator shown in FIG. 図8に示す保持装置における板ばね構造体の斜視図である。It is a perspective view of the leaf | plate spring structure in the holding | maintenance apparatus shown in FIG. 本発明の実施例に係る自動開閉扉の超音波モータに用いられる圧電振動子の一例を示す図である。It is a figure which shows an example of the piezoelectric vibrator used for the ultrasonic motor of the automatic door which concerns on the Example of this invention. 本発明の実施例に係る圧電振動子の斜視図であり、同図(a)は振動子の電圧印加時における屈曲2次固有振動モードの歪み分布を縞状模様で模型的に示した斜視図であり、同図(b)は同じく振動子の電圧印加時の伸縮1次固有振動モードにおける伸縮歪み分布を模型的に示した斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a piezoelectric vibrator according to an embodiment of the present invention, and FIG. 1A is a perspective view schematically showing a strain distribution in a bending secondary natural vibration mode when a voltage is applied to the vibrator in a striped pattern. FIG. 5B is a perspective view schematically showing a stretching strain distribution in the stretching primary natural vibration mode when a voltage is applied to the vibrator.

次に、本発明の実施例について図面を参照しつつ説明する。
図1、図2を参照すれば、壁面に沿って左右に移動する扉本体部1はその下端が床面2に対して僅かな隙間を有する形態で上端が固定壁3に吊り下げられように設置されている。より具体的には、実施例の自動開閉扉10は、扉本体部1の上部に隣接して固定壁3の壁面に、扉本体部1の走行方向に伸長した機枠部材4が固着されている。機枠部材4の前面には該部材4の長さ方向にのびる通し溝12が形成されている。扉本体部1の上端には略コ字状の吊下げ部材5の下端5aが固着され、さらに該吊下げ部材5の平坦な上面5cおよびコ字状部先端部5bが通し溝12を通して機枠部材4内に挿入され、該先端部5bは機枠部材4の底部近くまで延在している。なお、図1には前記機枠部材は図示省略してある。
Next, embodiments of the present invention will be described with reference to the drawings.
Referring to FIGS. 1 and 2, the door main body 1 that moves to the left and right along the wall surface is suspended at the fixed wall 3 with the lower end having a slight gap with respect to the floor surface 2. is set up. More specifically, in the automatic opening / closing door 10 of the embodiment, a machine frame member 4 extending in the traveling direction of the door main body 1 is fixed to the wall surface of the fixed wall 3 adjacent to the upper portion of the door main body 1. Yes. A through groove 12 extending in the length direction of the member 4 is formed on the front surface of the machine frame member 4. A lower end 5 a of a substantially U-shaped suspension member 5 is fixed to the upper end of the door body 1, and the flat upper surface 5 c of the suspension member 5 and the distal end portion 5 b of the U-shaped portion are passed through the through groove 12 to form a machine frame. The tip 5 b is inserted into the member 4 and extends near the bottom of the machine frame member 4. In FIG. 1, the machine frame member is not shown.

吊下げ部材5の先端部5bには、機枠部材4の内底面を転動する車輪6が軸支されている。図1に示すように、吊下げ部材5は扉本体部1の走行方向前後部の上端に一対設けられ、また各吊下げ部材5に軸支された車輪6は2個づつ対となって走行方向前後部に設けられ、これよって扉本体部1は機枠部材4に吊り下げられる形態で該機枠部材4に沿って左右に走行可能となっている。   A wheel 6 that rolls on the inner bottom surface of the machine frame member 4 is pivotally supported at the distal end portion 5 b of the suspension member 5. As shown in FIG. 1, a pair of suspension members 5 are provided at the upper ends of the front and rear portions of the door main body 1 in the traveling direction, and the wheels 6 pivotally supported by each suspension member 5 travel in pairs. It is provided at the front and rear portions in the direction, so that the door main body 1 can run left and right along the machine frame member 4 in a form suspended from the machine frame member 4.

一対の吊下げ部材5を橋絡するように、コ字状の吊下げ部材5の平坦な上面5cには基台7を介して摩擦摺動板8が固定されている。摩擦摺動板8の上方には、後述する超音波モータ9がその振動子出力端11が摩擦摺動板8に接当するように固定壁3の壁面に機器筐体13を介して装着されている。機枠部材4、基台7および摩擦摺動板8は扉本体部1の走行長さ全範囲にわたる長さに形成されている。超音波モータ9の付勢により、その圧電振動子の出力端11が励振され、かつ摩擦摺動板8に対して一定の押込み圧を与えつつ、送り動作(推力付与動作)を行い、これによって車輪6が機枠部材4の内底面を転動しつつ扉本体部1が走行移動する。したがってこの実施例では機枠部材4の内底面は、その上を車輪6が転動する転動路、あるいはレールとしての機能を有している。超音波モータ9に付随して扉本体部1の移動開始や移動方向を制御し、かつ扉本体部1の推力の値を設定する駆動制御部が設けられている。本発明では、この駆動制御部には一定値以上の負荷で扉本体部1の摩擦摺動板8に対する圧電振動子出力端11がスリップするように推力設定がなされている。なお、実際の推力の設定に際し、駆動トルクは超音波モータ一台の最大トルクが設計されており、複数個並列に使用することで全体の最大トルクが予め設計されている。   A friction sliding plate 8 is fixed to a flat upper surface 5 c of the U-shaped suspension member 5 via a base 7 so as to bridge the pair of suspension members 5. Above the friction sliding plate 8, an ultrasonic motor 9 to be described later is mounted on the wall surface of the fixed wall 3 via the device housing 13 so that the vibrator output end 11 contacts the friction sliding plate 8. ing. The machine frame member 4, the base 7, and the friction sliding plate 8 are formed to have a length that covers the entire travel length of the door body 1. Due to the urging of the ultrasonic motor 9, the output end 11 of the piezoelectric vibrator is excited, and a feeding operation (thrust applying operation) is performed while applying a constant pushing pressure to the friction sliding plate 8. The door body 1 travels while the wheels 6 roll on the inner bottom surface of the machine frame member 4. Therefore, in this embodiment, the inner bottom surface of the machine frame member 4 has a function as a rolling path or rail on which the wheels 6 roll. Along with the ultrasonic motor 9, there is provided a drive control unit for controlling the start and direction of movement of the door body 1 and setting the value of the thrust of the door body 1. In the present invention, the drive control unit is set with a thrust so that the piezoelectric vibrator output end 11 with respect to the friction sliding plate 8 of the door body 1 slips under a load of a certain value or more. Note that when setting the actual thrust, the maximum torque of one ultrasonic motor is designed as the driving torque, and the overall maximum torque is designed in advance by using a plurality of them in parallel.

上述のように、本発明に係る超音波モータ9は圧電振動子の出力端11の押込み圧が一定となる構造を有する。この構造は本出願人らに係る特許第4802313号明細書に開示された構造と同様のものが採用される。図3〜図10を参照してその構成の各種の形態について説明すれば、まず図3、図4の例示では、この圧電振動子20は振動子全体に屈曲と伸縮の合成振動が生じる形態であって、各々の長さが互いに等しい2枚の板ばね21(21a、21b)がその板面を圧電振動子20の加圧方向に互いに平行に離隔して配置され、この各々の板ばね21a、21bの一端が圧電振動子20の振動変位の小さい節部分22(図7参照)の位置に固着され、各板ばね21a、21bの他端がモータ内の固定部材23に固定され、前記板ばね21によって圧電振動子20を押込み方向に弾性的に押圧するように圧電振動子20が保持されている。図4は振動子出力端11の押込みにより板ばね21が変形した状態を示している。
この振動子保持構造は、板ばね21を加圧方向に対して適度な柔軟性を有するように選定することにより、振動子20の振動が抑制されず、エネルギー損失が少なく、また加圧方向以外の剛性は板ばね21の形態に応じて十分高くでき、圧電振動子20の押込み方向には安定した一定の押込み力を作用させ得る。
As described above, the ultrasonic motor 9 according to the present invention has a structure in which the pushing pressure of the output end 11 of the piezoelectric vibrator is constant. This structure is the same as that disclosed in Japanese Patent No. 4802313 related to the present applicants. 3 to 10, various forms of the configuration will be described. First, in the illustrations of FIGS. 3 and 4, the piezoelectric vibrator 20 is a form in which a combined vibration of bending and expansion / contraction occurs in the whole vibrator. The two leaf springs 21 (21a, 21b) having the same length are arranged with their plate surfaces spaced apart from each other in parallel to the pressure direction of the piezoelectric vibrator 20, and each of the leaf springs 21a. , 21b is fixed to the position of the node portion 22 (see FIG. 7) where the vibration displacement of the piezoelectric vibrator 20 is small, and the other ends of the leaf springs 21a, 21b are fixed to a fixing member 23 in the motor. The piezoelectric vibrator 20 is held by the spring 21 so as to elastically press the piezoelectric vibrator 20 in the pushing direction. FIG. 4 shows a state in which the leaf spring 21 is deformed by pushing the transducer output end 11.
In this vibrator holding structure, by selecting the leaf spring 21 to have an appropriate flexibility in the pressurizing direction, vibration of the vibrator 20 is not suppressed, energy loss is small, and other than the pressurizing direction. Can be sufficiently high depending on the form of the leaf spring 21, and a stable and constant pushing force can be applied in the pushing direction of the piezoelectric vibrator 20.

なお、上記実施例では圧電振動子20の片側を2枚の平行な板ばね21a、21bで支持するようにしたが、図6(a)、(b)に示すように、圧電振動子20の両側面を一対の平行な傾斜した板ばね21、25で支持するようにしてもよい。この場合も各板ばね21、25の支持位置は圧電振動子20の節部22の位置で該振動子20を支持するようにしてもよい。両側の板ばね21、25は圧電振動子20の軸線に対して対称配置となっている。図6(b)はこの場合の圧電振動子20が摩擦摺動板8に対して押込みを行った時の状態である。   In the above embodiment, one side of the piezoelectric vibrator 20 is supported by two parallel leaf springs 21a and 21b. However, as shown in FIGS. Both side surfaces may be supported by a pair of parallel inclined leaf springs 21 and 25. Also in this case, the plate springs 21 and 25 may be supported at the position of the node portion 22 of the piezoelectric vibrator 20 to support the vibrator 20. The leaf springs 21 and 25 on both sides are symmetrically arranged with respect to the axis of the piezoelectric vibrator 20. FIG. 6B shows a state when the piezoelectric vibrator 20 in this case pushes against the frictional sliding plate 8.

さらに本発明の一定押込み圧を確保する他の実施例では、図8〜図10に示すような板ばね構造体30を介して圧電振動子20を支持部材31で支持する形態としている。支持部材31は枠形または箱形の形状であり、圧電振動子20を支持部材31内に離隔して収容するようになっており、この支持部材31と圧電振動子20との間に板ばね構造体30が介在されて圧電振動子20を該板ばね構造体30で支持している。   Furthermore, in another embodiment of the present invention that ensures a constant pressing pressure, the piezoelectric vibrator 20 is supported by the support member 31 via a leaf spring structure 30 as shown in FIGS. The support member 31 has a frame shape or a box shape, and accommodates the piezoelectric vibrator 20 separately in the support member 31. A leaf spring is provided between the support member 31 and the piezoelectric vibrator 20. The structure 30 is interposed to support the piezoelectric vibrator 20 with the leaf spring structure 30.

板ばね構造体30は、支持部材31の一方の片側部31bに固着された第1の基端部32から圧電振動子20の対向両側部(基端部32に対峙する振動子20の側面と直角方向の両側面、その一方を符号20dで示す。)を挟むように前記片側部31b側と反対側の振動子側部20eをまたいで折り返されて振動子側部20f(振動子側部20eに対向した側部)に固着された第1の板ばね部材33と、支持部材31の他方の片側部31cに固着された第2の基端部34から圧電振動子20の前記対向両側部(一方のみ符号20dで示す。)を挟むように圧電振動子20の前記側部20fをまたいで折り返されて前記振動子側部20eに固着された第2の板ばね部材35とを有し、前記第1、第2の板ばね部材33、35が圧電振動子20をまたいで折り返す部分をつなぐように一体化されている(符号36の部分)。圧電振動子20は、図9に示すように離隔した少なくとも2体の同様の板ばね構造体30、40によって支持されている。圧電振動子20の出力端11は支持部材31の開口31aから摩擦摺動板(図示省略)に圧接するように突出している。   The leaf spring structure 30 includes a first base end portion 32 fixed to one side portion 31b of the support member 31 and opposite opposite side portions of the piezoelectric vibrator 20 (a side surface of the vibrator 20 facing the base end portion 32). Both side surfaces in the right-angle direction, one of which is indicated by reference numeral 20d) are folded back across the transducer side portion 20e opposite to the one side portion 31b, and the transducer side portion 20f (vibrator side portion 20e). The first leaf spring member 33 fixed to the opposite side) and the second base end 34 fixed to the other one side 31c of the support member 31 from the opposite opposite sides ( And a second leaf spring member 35 which is folded back across the side portion 20f of the piezoelectric vibrator 20 and fixed to the vibrator side portion 20e so as to sandwich the pin 20). The first and second leaf spring members 33 and 35 connect the piezoelectric vibrator 20 to each other. It is integrated so as to connect the portion folded back against the (part of the code 36). The piezoelectric vibrator 20 is supported by at least two similar leaf spring structures 30 and 40 which are spaced apart from each other as shown in FIG. The output end 11 of the piezoelectric vibrator 20 protrudes from the opening 31a of the support member 31 so as to be in pressure contact with a friction sliding plate (not shown).

図9は図8に示す支持部材31を除去した状態の圧電振動子20と板ばね構造体30、40の斜視図である。符号37は第1の板ばね部材33と圧電振動子20との固着部、符号38(図8、図10)は第2の板ばね部材35と圧電振動子20との固着部である。固着部37は第2の板ばね部材35の振動子またぎ部分35aに連接し、固着部38は第1の板ばね部材33の振動子またぎ部分33aに連接している。   FIG. 9 is a perspective view of the piezoelectric vibrator 20 and the leaf spring structures 30 and 40 with the support member 31 shown in FIG. 8 removed. Reference numeral 37 denotes a fixing portion between the first leaf spring member 33 and the piezoelectric vibrator 20, and reference numeral 38 (FIGS. 8 and 10) denotes a fixing portion between the second leaf spring member 35 and the piezoelectric vibrator 20. The fixing portion 37 is connected to the vibrator straddling portion 35 a of the second leaf spring member 35, and the fixing portion 38 is connected to the vibrator straddling portion 33 a of the first leaf spring member 33.

この図8〜図10の圧電振動子支持構造では、押込み方向以外の方向には剛性が高く、かつ押込み方向には柔軟性があり、また、負荷の調整も板ばね構造体の帯状部材の長さを変えることで容易に調整可能である。さらに、圧電振動子20と支持部材31間にはガタなどがなく、圧電振動子の位置決めの安定性がよく、従来のようなコイルばねを用いたものと比べて振動エネルギーの損失が少ない。また、一定荷重で圧電振動子を摩擦摺動板に押し付けることができ、摩擦駆動を行う超音波モータに対し安定した摩擦力をもたらすことができる。これによって摩擦摺動板を固着した扉本体部の推力を一定に保持するのが容易となり、摩擦摺動板の平面精度を緩和することができ、長期にわたって安定した自動扉の使用が可能となる。   8 to 10, the piezoelectric vibrator support structure has high rigidity in directions other than the pushing direction and is flexible in the pushing direction, and the load is adjusted by the length of the belt-like member of the leaf spring structure. It can be easily adjusted by changing the height. Furthermore, there is no backlash between the piezoelectric vibrator 20 and the support member 31, and the positioning stability of the piezoelectric vibrator is good, and the loss of vibration energy is less than that using a conventional coil spring. In addition, the piezoelectric vibrator can be pressed against the frictional sliding plate with a constant load, and a stable frictional force can be provided to the ultrasonic motor that performs frictional driving. This makes it easy to keep the thrust of the door main body, to which the frictional sliding plate is fixed, constant, eases the flatness of the frictional sliding plate, and enables the use of a stable automatic door for a long period of time. .

また本発明に係る超音波モータは、圧電振動素子が縦振動と屈曲振動が独立して励振される形態となっており、本出願人らに係る特許第4830165号、特許第4892661号に示された構造のものが採用されている。その概略は図11、図12(a)、(b)に例示するとおりである。この構造においては、圧電振動子20は、屈曲振動と伸縮振動をそれぞれ独立して励振するため、屈曲振動を励振する電極51、52と伸縮振動を励振する電極53を別々に設け、かつ前記屈曲振動を励振する電極51、52が、屈曲固有振動モードの歪みが所定の値以上となる領域に前記電極51、52の外形曲線部が前記歪みの等高線上に略沿うように配置されている。なお、図11はこの実施例における圧電振動子20の平面図であり、図12(a)は圧電振動子20の電圧印加時における屈曲2次固有振動モードの歪み分布を縞状模様で模型的に示し、同図(b)は圧電振動子20の電圧印加時の伸縮1次固有振動モードにおける伸縮歪み分布を模型的に示した斜視図である。   Further, the ultrasonic motor according to the present invention has a configuration in which the piezoelectric vibration element is excited independently of the longitudinal vibration and the bending vibration, and is disclosed in Japanese Patent Nos. 4830165 and 4926661 related to the present applicants. The one with the same structure is adopted. The outline is as illustrated in FIG. 11, FIG. 12 (a), (b). In this structure, since the piezoelectric vibrator 20 excites the bending vibration and the stretching vibration independently of each other, the electrodes 51 and 52 for exciting the bending vibration and the electrode 53 for exciting the stretching vibration are separately provided, and the bending vibration is provided. The electrodes 51 and 52 for exciting the vibration are arranged in a region where the distortion in the bending natural vibration mode is a predetermined value or more so that the outer curve portion of the electrodes 51 and 52 is substantially along the contour line of the distortion. FIG. 11 is a plan view of the piezoelectric vibrator 20 in this embodiment, and FIG. 12A is a model of the strain distribution of the bending secondary natural vibration mode when a voltage is applied to the piezoelectric vibrator 20 in a striped pattern. FIG. 5B is a perspective view schematically showing the expansion / contraction strain distribution in the expansion / contraction primary natural vibration mode when a voltage is applied to the piezoelectric vibrator 20.

屈曲2次振動においては、その振幅分布は矩形板状圧電振動子20の全長が略1波長に相当する横振動(圧電体内に振幅を有する振動)であり、振幅が最大になる箇所で歪みが最大となり、この箇所は振動自由端である長手方向左右の端部から略1/4の位置にある。この位置で矩形板状圧電振動子20の長辺側部2から圧電振動子の幅方向中央側へ向って凸わん曲状に歪みが拡がっている。符号55、56は長手方向の歪みの値が等しい位置をつないだ歪み分布の等高線を示してい。55は伸縮振動歪みの等高線、56は屈曲振動歪みの等高線である。伸縮1次振動では、図12(b)に示すように、圧電振動子20の全長が1/2波長に相当する縦振動(圧電体の長手方向に振幅を有する振動)であり、屈曲振動とは逆に振動変位が最少となる箇所で歪みが最大となる。具体的には、圧電振動子20の中央付近で歪みが最大となり、この位置から自由端側へ向って略同心円状にわん曲して歪みが分布している。屈曲振動をもたらす電極51、52は歪みの最大となる箇所に、かつ圧電振動子20の片面でみれば、横幅方向に対向して一対づつ配置され、この面と対向する他方の面(図の裏面)にも同様の関係で一対づつ配置される。これに対し伸縮1次振動の場合は、電極53は圧電振動子20の長手方向中央位置の対向する表裏の両面に1箇所づつ配置されている。歪み分布の等高線55、56は屈曲振動および伸縮振動とも、わん曲線状となり、電極51、52、53として、その外形の一部がこの等高線の曲線に略沿った形状のものが配置される。   In the bending secondary vibration, the amplitude distribution is a transverse vibration (vibration having an amplitude in the piezoelectric body) in which the entire length of the rectangular plate-like piezoelectric vibrator 20 corresponds to approximately one wavelength, and distortion occurs at a position where the amplitude is maximum. This point is at a maximum, and this point is at a position substantially ¼ from the left and right ends in the longitudinal direction, which is the free end of vibration. At this position, the distortion spreads in a convex and curved manner from the long side portion 2 of the rectangular plate-shaped piezoelectric vibrator 20 toward the center in the width direction of the piezoelectric vibrator. Reference numerals 55 and 56 indicate contour lines of a strain distribution connecting positions having equal strain values in the longitudinal direction. 55 is a contour line of stretching vibration distortion, and 56 is a contour line of bending vibration distortion. In the expansion and contraction primary vibration, as shown in FIG. 12B, the total length of the piezoelectric vibrator 20 is a longitudinal vibration corresponding to a half wavelength (a vibration having an amplitude in the longitudinal direction of the piezoelectric body). On the contrary, the distortion is maximized at the position where the vibration displacement is minimized. Specifically, the strain becomes maximum near the center of the piezoelectric vibrator 20, and the strain is distributed in a substantially concentric manner from this position toward the free end side. The electrodes 51 and 52 that cause the bending vibration are disposed at a position where the strain is maximum and on one side of the piezoelectric vibrator 20 so as to be opposed to each other in the lateral width direction, and the other surface (in the drawing). A pair is also arranged in the same relationship on the back surface. On the other hand, in the case of the expansion and contraction primary vibration, the electrodes 53 are arranged one by one on both the front and back surfaces facing each other at the center position in the longitudinal direction of the piezoelectric vibrator 20. The contour lines 55 and 56 of the strain distribution are both curved and bent, and the electrodes 51, 52 and 53 are arranged such that a part of the outer shape thereof is substantially along the contour curve.

このような電極配置によって、振動子の温度上昇、発熱の原因となる振動子損失が小さくなり、また、電極の外形の一部をを歪みの等高線に略沿った曲線部材を含む形状としたので、電圧印加時に発生する振動子の応力が減少し、応力集中にる疲労亀裂や破損がなくなり、自動開閉扉の長期反復使用に対しても圧電振動素子の耐久性、信頼性が向上する。   With such an electrode arrangement, the transducer loss that causes the temperature rise and heat generation of the transducer is reduced, and a part of the outer shape of the electrode is shaped to include a curved member substantially along the contour line of the strain. The stress of the vibrator generated when voltage is applied is reduced, fatigue cracks and breakage due to stress concentration are eliminated, and the durability and reliability of the piezoelectric vibration element are improved even when the automatic opening / closing door is used repeatedly for a long time.

本発明における自動開閉扉は、超音波モータとして上述のような構成のものとすることにより、駆動制御部材において扉本体部の推力を自由に設定することができ、これによって予定推力以上の負荷がかかっても、圧電振動素子が扉本体部の摩擦摺動板に対してスリップし、扉本体部は直ちに移動停止し、例えば子供が扉の閉動作途中で扉と壁との間に挟まったり、扉に人がぶつかったりした時に深刻な怪我などを負ったりする事故が防止される。また、扉の緊急停止だけでなく、閉動作途中の過大負荷あるいは不慮の負荷時に逆方向に、つまり開き方向に動作するように設定することも可能である。   The automatic opening / closing door according to the present invention is configured as an ultrasonic motor as described above, so that the drive control member can freely set the thrust of the door main body, and this causes a load greater than the planned thrust. Even if it takes, the piezoelectric vibration element slips against the friction sliding plate of the door main body part, the door main body part immediately stops moving, for example, a child is caught between the door and the wall during the door closing operation, Accidents such as serious injuries when people hit the door are prevented. In addition to the emergency stop of the door, it is also possible to set to operate in the reverse direction, that is, in the opening direction at the time of an excessive load or an unexpected load during the closing operation.

1 扉本体部
2 床面
3 固定壁
4 機枠部材
5 吊下げ部材
6 車輪
7 基台
8 摩擦摺動板
9 超音波モータ
10 自動開閉扉
11 振動子出力端
12 通し溝
13 筐体
DESCRIPTION OF SYMBOLS 1 Door main-body part 2 Floor surface 3 Fixed wall 4 Machine frame member 5 Hanging member 6 Wheel 7 Base 8 Friction sliding plate 9 Ultrasonic motor 10 Automatic opening / closing door 11 Vibrator output end 12 Through groove 13 Case

Claims (6)

扉本体部の上部に連結された車輪と、固定壁側に設けられ、かつ前記車輪が転動する車輪転動路と、前記扉本体部を前記車輪転動路に沿って移動させる扉駆動装置とを有し、
前記扉駆動装置は、前記固定壁に固定された超音波モータと、前記扉本体部の上部に連結され、かつ前記超音波モータの圧電振動子出力端と接触するように配置された摩擦摺動板と、一定以上の負荷で前記扉本体部の前記摩擦摺動板に対する前記圧電振動子出力端がスリップするように推力設定された前記超音波モータの駆動制御部とを有し、
前記超音波モータは、縦振動と屈曲振動を独立して励振させる電極配置構造となっており、かつ前記圧電振動子出力端の押込み圧を一定にする保持装置によって前記固定壁に固定されることを特徴とする自動開閉扉。
Wheels connected to the upper part of the door main body, a wheel rolling path provided on the fixed wall side and rolling the wheel, and a door driving device for moving the door main body along the wheel rolling path And
The door driving device includes an ultrasonic motor fixed to the fixed wall, and a frictional sliding connected to an upper portion of the door main body portion and in contact with the piezoelectric vibrator output end of the ultrasonic motor. A drive control unit of the ultrasonic motor set to thrust so that the piezoelectric vibrator output end with respect to the friction sliding plate of the door main body part with a load of a certain level or more,
The ultrasonic motor has an electrode arrangement structure that independently excites longitudinal vibration and bending vibration, and is fixed to the fixed wall by a holding device that keeps the pressing pressure at the output end of the piezoelectric vibrator constant. Automatic opening and closing door characterized by.
前記扉本体部が、前記車輪を介して前記固定壁側の前記車輪転動路に吊り下げられている請求項1に記載の自動開閉扉。   The automatic door according to claim 1, wherein the door main body is suspended from the wheel rolling path on the fixed wall side via the wheel. 前記超音波モータの圧電振動子は、各々の長さが互いに等しい2枚の板ばねが、その板面を前記圧電振動子の加圧方向に互いに平行に離隔して配置され、前記板ばねの一端が前記圧電振動子の振動変位の小さい節部分の位置に固着され、かつ他端が支持部材に固定され、前記板ばねによって前記圧電振動子が加圧方向に弾性的に押圧された保持装置に保持されている請求項1または2に記載の自動開閉扉。   In the piezoelectric vibrator of the ultrasonic motor, two plate springs each having the same length are arranged with their plate surfaces spaced apart from each other in parallel to the pressurizing direction of the piezoelectric vibrator. A holding device in which one end is fixed to a position of a node portion with small vibration displacement of the piezoelectric vibrator, the other end is fixed to a support member, and the piezoelectric vibrator is elastically pressed in the pressurizing direction by the leaf spring. The automatic opening / closing door of Claim 1 or 2 currently hold | maintained. 前記超音波モータの圧電振動子は、各々の長さが互いに等しい2対(4枚)の板ばねが、その板面を前記圧電振動子の加圧方向に互いに平行に離隔して配置され、前記板ばねの一端が前記圧電振動子の振動変位の小さい節部分の位置に固着され、かつ他端が支持部材に固定され、前記板ばねによって前記圧電振動子が加圧方向に弾性的に押圧された保持装置に保持されている請求項1または2に記載の自動開閉扉。   In the piezoelectric vibrator of the ultrasonic motor, two pairs (four) of leaf springs each having the same length are arranged with their plate surfaces spaced apart from each other in parallel to the pressing direction of the piezoelectric vibrator, One end of the leaf spring is fixed to the position of the node portion where the vibration displacement of the piezoelectric vibrator is small, and the other end is fixed to a support member, and the piezoelectric vibrator is elastically pressed in the pressurizing direction by the leaf spring. The automatic opening / closing door according to claim 1 or 2, which is held by a holding device. 前記圧電振動子を離隔して収容する枠形または箱形の支持部材と、前記支持部材の側部と前記圧電振動子との間に介在される板ばね構造体とを有し、前記板ばね構造体は、前記支持部材の片側部に固着された基端部から前記圧電振動子の対向両側部を挟むように前記圧電振動子の前記側部をまたいで折り返されて該圧電振動子に固着された第1の板ばね部材と、前記支持部材の他方の片側部に固着された基端部から前記圧電振動子の前記対向両側部を挟むように前記圧電振動子の前記側部をまたいで折り返されて該圧電振動子に固着された第2の板ばね部材とを有し、前記第1の板ばね部材と前記第2の板ばね部材が前記圧電振動子との固着部分で一体化されている保持装置によって、前記超音波モータの圧電振動子が保持されている請求項1または2に記載の自動開閉扉。   A plate-shaped or box-shaped support member that accommodates the piezoelectric vibrator separately; and a leaf spring structure that is interposed between a side portion of the support member and the piezoelectric vibrator; The structure is folded back across the side portion of the piezoelectric vibrator so as to sandwich the opposite opposite sides of the piezoelectric vibrator from the base end portion fixed to one side portion of the support member, and is fixed to the piezoelectric vibrator. Straddling the side portion of the piezoelectric vibrator so as to sandwich the opposing both sides of the piezoelectric vibrator from the first leaf spring member formed and the base end portion fixed to the other one side portion of the support member. A second leaf spring member that is folded back and secured to the piezoelectric vibrator, and the first leaf spring member and the second leaf spring member are integrated at a fastening portion with the piezoelectric vibrator. The piezoelectric vibrator of the ultrasonic motor is held by the holding device. Or automatic door according to. 前記超音波モータの圧電振動子は、屈曲振動と伸縮振動をそれぞれ独立して励振するため、屈曲振動を励振する電極と伸縮振動を励振する電極が別々に設けられ、前記屈曲振動を励振する電極が、屈曲固有振動モードの歪みが所定の値以上となる領域に前記電極の外形曲線部材が前記歪みの等高線上に略沿うように配置されている請求項1〜5のいずれかに記載の自動開閉扉。   Since the piezoelectric vibrator of the ultrasonic motor excites the bending vibration and the stretching vibration independently, an electrode for exciting the bending vibration and an electrode for exciting the stretching vibration are separately provided, and the electrode that excites the bending vibration. The automatic curve according to any one of claims 1 to 5, wherein an outer curved member of the electrode is arranged so as to be substantially along a contour line of the strain in a region where the strain of the bending natural vibration mode is a predetermined value or more. Open / close door.
JP2012238169A 2012-10-29 2012-10-29 Automatic opening and closing door Pending JP2014088681A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113374373A (en) * 2021-06-07 2021-09-10 福建省福能龙安热电有限公司 Electric inserting plate door of circulating fluidized bed boiler
CN114887268A (en) * 2022-04-11 2022-08-12 安徽圣特恩电子科技有限公司 High-reliability automatic inspection control cabinet for high-voltage motor fire pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113374373A (en) * 2021-06-07 2021-09-10 福建省福能龙安热电有限公司 Electric inserting plate door of circulating fluidized bed boiler
CN114887268A (en) * 2022-04-11 2022-08-12 安徽圣特恩电子科技有限公司 High-reliability automatic inspection control cabinet for high-voltage motor fire pump

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