JPS62172943A - Apparatus for controlling number of rotations of dental air turbine handpiece - Google Patents
Apparatus for controlling number of rotations of dental air turbine handpieceInfo
- Publication number
- JPS62172943A JPS62172943A JP1297886A JP1297886A JPS62172943A JP S62172943 A JPS62172943 A JP S62172943A JP 1297886 A JP1297886 A JP 1297886A JP 1297886 A JP1297886 A JP 1297886A JP S62172943 A JPS62172943 A JP S62172943A
- Authority
- JP
- Japan
- Prior art keywords
- air
- valve
- solenoid valve
- flow rate
- air turbine
- 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.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 230000001276 controlling effect Effects 0.000 claims description 9
- 230000003584 silencer Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は歯科用エアタービンハンドピースのエアタービ
ンに供給する圧縮空気の供給Ｉを調整してエアタービン
の回転数を制御する歯科用エアタービンハンドピースの
回転数制御装置に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a dental air turbine that controls the rotational speed of the air turbine by adjusting the supply I of compressed air supplied to the air turbine of a dental air turbine handpiece. This invention relates to a handpiece rotation speed control device.
（従来の技術）
従来、歯科用エアタービンハンドピースのエアタービン
の回転数を制御する歯科用エアタービンハンドピースの
回転数制御装置は、空気源とエアタービンとの間に配設
された流量調整弁に多数のギヤとモータ等より構成され
た流量調整装置を添設し、該流量調整装置のギヤをモー
タにより回転させることによって流量調整弁弁開度を調
整して、歯科用エアタービンハンドピースのエアタービ
ンに供給する圧縮空気量を制御し、これによって歯科用
エアタービンハンドピースのエアタービンの回転数を制
御していた。(Prior Art) Conventionally, a rotational speed control device for a dental air turbine handpiece that controls the rotational speed of an air turbine of a dental air turbine handpiece uses a flow rate adjustment device disposed between an air source and an air turbine. A dental air turbine handpiece is created by attaching a flow regulating device to the valve, which is composed of a large number of gears, a motor, etc., and adjusting the valve opening of the flow regulating valve by rotating the gears of the flow regulating device with the motor. The amount of compressed air supplied to the air turbine of the dental air turbine handpiece was controlled, thereby controlling the rotational speed of the air turbine of the dental air turbine handpiece.
（発明が解決しようとする問題点）
しかしながら、このような流量調整装置は多数のギヤを
組み合わせた装置で弁開度を調整しているので、ギヤの
遊びが微少な空気流量の調整を行うことを妨げ、制御性
の点において問題があった。(Problem to be Solved by the Invention) However, since such a flow rate adjustment device adjusts the valve opening degree using a device that combines a large number of gears, it is difficult to adjust the air flow rate with minute play in the gears. This caused problems in terms of controllability.
また、ギヤの噛み合わせ音も大きいので、ギヤの消耗が
大であり、耐久性の点においても問題があった。Furthermore, since the meshing noise of the gears is loud, the gears are subject to considerable wear and tear, and there are also problems in terms of durability.
さらに、このように多数のギヤを噛み合わせた流量調整
装置は毛髪等の微細なごみがギヤに引っ掛かって、ギヤ
にかかる負荷が僅かに増加しただけでも、ギヤの回転が
停止してしまって流量調整を行うことができなくなると
言ったこともあり、流量調整装置自体の信頼性の点にお
いても問題があった。Furthermore, in a flow rate adjustment device that has a large number of gears meshed together, even if minute particles such as hair get caught in the gears and the load on the gears increases even slightly, the rotation of the gears will stop, making it difficult to adjust the flow rate. There was also a problem in terms of the reliability of the flow rate adjustment device itself.
（問題点を解決するための手段）
本発明は上記の点に鑑みてなされたもので、すなわち、
フートペダルの踏圧力によって、空気源と歯科用エアタ
ービンハンドピースの間の空気供給流路の途中に設けた
流量調整弁の弁開度を調整し、エアタービンに流れる空
気量を制御することによって、エアタービンの回転数を
制御する歯科用エアタービンハンドピースの回転数制御
装置において、前記流量調整弁のパイロットポートにエ
アタンクを接続し、かつ前記空気供給流路の流量調整弁
の上流より分岐して前記エアタンクを介して消音器に至
る第１及び第２の圧力制御流路を設け、この第１の圧力
制御流路におけるエアタンクの上流側には給気用電磁弁
及び給気用絞り弁を、また下流側には排気用絞り弁及び
排気用電磁弁を配設すると共に、第２の圧力制御流路に
おけるエアタンクの上流側には急速給気用電磁弁を、ま
た下流側には急速排気用電磁弁を配設して、さらに前記
フートペダルの踏込量を検知してエアタービンの回転数
の目標値を設定する可変抵抗器を設け、そして該目標値
と、前記流量調整弁と歯科用エアタービンハンドピース
との間の空気供給流路の途中に設けた圧力センサによっ
て測定された測定値とを比較して前記各種電磁弁の開閉
動作を制御する電磁弁コントロール装置とを設けて構成
したことを特徴とする歯科用エアタービンハンドピース
の回転数制御装置である。(Means for solving the problems) The present invention has been made in view of the above points, that is,
By controlling the amount of air flowing into the air turbine by adjusting the valve opening of the flow rate regulating valve installed in the middle of the air supply flow path between the air source and the dental air turbine handpiece by the pressing force of the foot pedal, In a rotation speed control device for a dental air turbine handpiece that controls the rotation speed of an air turbine, an air tank is connected to a pilot port of the flow rate adjustment valve, and the air supply flow path is branched from upstream of the flow rate adjustment valve. First and second pressure control flow paths leading to the silencer via the air tank are provided, and an air supply solenoid valve and an air supply throttle valve are provided on the upstream side of the air tank in the first pressure control flow path, In addition, an exhaust throttle valve and an exhaust solenoid valve are installed on the downstream side, and a quick air supply solenoid valve is installed on the upstream side of the air tank in the second pressure control channel, and a quick exhaust solenoid valve is installed on the downstream side. A solenoid valve is provided, and a variable resistor is further provided to detect the amount of depression of the foot pedal and set a target value of the rotation speed of the air turbine, and the target value, the flow rate adjustment valve, and the dental air turbine are connected to each other. and a solenoid valve control device that controls the opening and closing operations of the various solenoid valves by comparing the values measured by a pressure sensor provided in the middle of the air supply flow path between the handpiece and the handpiece. This is a rotation speed control device for a dental air turbine handpiece.
（実施例）
本発明の歯科用エアタービンハンドピースの回転数制御
装置の一実施例について以下図面に基づき具体的に説明
する。(Embodiment) An embodiment of the rotation speed control device for a dental air turbine handpiece according to the present invention will be specifically described below with reference to the drawings.
第１図は本発明実施例の歯科用エアタービンハ＝４＝
ンドピースの回転数制御装置におけるエアタンク内に圧
縮空気を供給してエアタービンを高速回転させている時
の回路図、第２図は第１図の回転数制御装置のエアタン
ク内の圧縮空気を排気してエアタービンを低速回転させ
ている時の回路図、第３図は本発明制御装置の電磁弁コ
ントロール回路のブロック図を表わす。Fig. 1 is a circuit diagram of a dental air turbine handpiece rotation speed control device according to an embodiment of the present invention when compressed air is supplied into the air tank to rotate the air turbine at high speed. FIG. 3 is a circuit diagram of the rotation speed control device when the compressed air in the air tank is exhausted to rotate the air turbine at a low speed, and FIG. 3 is a block diagram of the electromagnetic valve control circuit of the control device of the present invention.
本発明の歯科用エアタービンハンドピースの回転数制御
装置は、第１図に示すごとく、主として、空気源１から
歯科用エアタービンハンドピース２のエアタービン３に
通じる空気供給流路４の途中にエアタンク５内の空気圧
力によって弁開度が調整されるようにエアタンク５を添
設した流量調整弁６を配設し、該空気供給流路４の前記
流量調整弁６の上流より分岐する第１及び第２の圧力制
御流路７ａ、７ｂの途中に前記エアタンク５に圧縮空気
の供給又は排出を制御する電磁弁８ａ、８ｂ、８ｃ。As shown in FIG. 1, the rotational speed control device for a dental air turbine handpiece according to the present invention is mainly applied to an air supply flow path 4 leading from an air source 1 to an air turbine 3 of a dental air turbine handpiece 2. A flow rate regulating valve 6 attached with an air tank 5 is arranged so that the valve opening degree is adjusted by the air pressure in the air tank 5, and a first branching from the upstream of the flow rate regulating valve 6 of the air supply channel 4 is provided. and electromagnetic valves 8a, 8b, 8c for controlling the supply or discharge of compressed air to the air tank 5 in the middle of the second pressure control channels 7a, 7b.
８ｄを配設して、これら電磁弁８ａ、８ｂ、８ｃ、８ｄ
をフートペダルの踏込量を検知してエアタービン３の回
転数の目標値を設定する可変抵抗器９の目標値と、前記
流星調整弁６と歯科用エアタービンハンドピース２との
間の空気供給流路４の途中に配設された圧力センサ１０
によって測定された測定値を比較して開閉することによ
って流量制御する電磁弁コントロール回路１１とから構
成されている。8d, and these solenoid valves 8a, 8b, 8c, 8d
The target value of the variable resistor 9 which detects the amount of depression of the foot pedal and sets the target value of the rotation speed of the air turbine 3, and the air supply flow between the meteor adjustment valve 6 and the dental air turbine handpiece 2. Pressure sensor 10 arranged in the middle of path 4
The electromagnetic valve control circuit 11 controls the flow rate by comparing the measured values and opening and closing the valve.
本発明の歯科用エアタービンハンドピースの回転数制御
装置の圧縮空気の流路は第１図に示すごとく、主として
、空気源１かも歯科用ハンドピース２のエアタービン３
に通じる空気供給流路４と、該空気供給流路４の上流に
ある三叉路１２より分岐してエアタンク５を介して消音
器↓３に至る第１の圧力制御流路７ａと、該第１の圧力
制御流路７ａの上流側の三叉路１４より分岐してエアタ
ンク５を介して消音器１３に至る第２の圧力制御流路７
ｂとから成っている。As shown in FIG. 1, the compressed air flow path of the rotational speed control device for a dental air turbine handpiece according to the present invention mainly consists of the air source 1 and the air turbine 3 of the dental handpiece 2.
a first pressure control flow path 7a branching from a three-way junction 12 located upstream of the air supply flow path 4 and leading to the muffler↓3 via the air tank 5; A second pressure control flow path 7 branches from the three-pronged path 14 on the upstream side of the pressure control flow path 7a and reaches the muffler 13 via the air tank 5.
It consists of b.
前記空気供給流路４の途中にはエアタンク５を添設した
パイロット付流量調整弁６が配設されており、このパイ
ロット付流量調整弁６の弁開度によって歯科用エアター
ビンハンドピース２へ流れる圧縮空気の量が制御される
。A pilot-equipped flow rate regulating valve 6 with an air tank 5 attached is disposed in the middle of the air supply channel 4, and the flow to the dental air turbine handpiece 2 is determined by the valve opening of the pilot-equipped flow rate regulating valve 6. The amount of compressed air is controlled.
また、前記第１の圧力制御流路７ａは空気供給流路４の
流星調整弁６の上流に設けられた三叉路１２より分岐し
て、前、記空気供給流路４のパイロット付流量調整弁６
に添設されているエアタンク５に接続路７ｄにより連通
している四叉路１５を経た後、消音器１３に至っており
、該第１の圧力制御流路７ａの途中の四叉路１５より上
流側には前記エアタンク５の給気を制御する給気用電磁
弁８ａが、また、下流側にはエアタンク５内の圧縮空気
の排気を制御する排気用電磁弁８ｂが配設されている。The first pressure control flow path 7a branches from a three-way junction 12 provided upstream of the meteor adjustment valve 6 of the air supply flow path 4, and is connected to the pilot-equipped flow rate adjustment valve 6 of the air supply flow path 4.
After passing through a four-way intersection 15 that communicates with the air tank 5 attached to the air tank 5 through a connecting path 7d, it reaches the silencer 13, and is located upstream of the four-way intersection 15 in the middle of the first pressure control flow path 7a. An air supply solenoid valve 8a for controlling the air supply to the air tank 5 is disposed on the side, and an exhaust solenoid valve 8b for controlling the exhaust of the compressed air in the air tank 5 is disposed on the downstream side.
更に、該四叉路１５と給気用電磁弁８ａとの間には供給
用流量調整バルブ１６ａが、また、四叉路１５と排気用
電磁弁８ｂとの間には排気用流Ｘ調整バルブ１６ｂが配
設されている。Further, a supply flow rate adjustment valve 16a is provided between the four-way junction 15 and the air supply solenoid valve 8a, and an exhaust flow X adjustment valve is provided between the four-way junction 15 and the exhaust solenoid valve 8b. 16b is provided.
前記空気供給流路４のパイロット付流量調整弁６は前記
エアタンク５内の空気圧の高低によって押圧力が変化す
ると自動的に弁開度が調整されるものである。例えば、
エアタンク５内の空気圧が高い場合には押圧力が大とな
り前記パイセット付流量調整弁６の弁開度が大となって
、歯科用ハンドピース２のエアタービン３への圧縮空気
への流量が増加する。また、エアタンク５内の空気圧が
低い場合には押圧力が小さくなってパイロット付流量調
整弁６の弁開度が小又はｒｊＡＭ状態となって、歯科用
ハンドピース２のエアタービン３への圧縮空気の流量を
減少もしくは停止させる。The pilot-equipped flow rate regulating valve 6 of the air supply channel 4 automatically adjusts its opening when the pressing force changes depending on the level of air pressure in the air tank 5. for example,
When the air pressure in the air tank 5 is high, the pressing force becomes large, and the valve opening of the flow rate adjustment valve 6 with a pipe set becomes large, so that the flow rate of the compressed air from the dental handpiece 2 to the air turbine 3 is increased. To increase. Further, when the air pressure in the air tank 5 is low, the pressing force becomes small and the valve opening degree of the flow rate adjustment valve 6 with pilot becomes small or in the rjAM state, and the compressed air from the dental handpiece 2 to the air turbine 3 is reduced. Reduce or stop the flow rate.
したがって、歯科用ハンドピース２のエアタービン３へ
の空気流星を増加させるためには、第１図に示すごとく
、給気用電磁弁８ａを開き、排気用電磁弁８ｂを閉じて
、エアタンク５内に圧縮空気を導入し、エアタンク５内
の空気圧力を増加させ、これによって流量調整弁６を開
いてエアタービン３へ流れる空気供給流路４の空気流量
を増加させることによって行なわれる。Therefore, in order to increase the amount of air coming from the dental handpiece 2 to the air turbine 3, as shown in FIG. This is done by introducing compressed air into the air tank 5 to increase the air pressure in the air tank 5, thereby opening the flow rate regulating valve 6 and increasing the air flow rate in the air supply passage 4 flowing to the air turbine 3.
また、歯科用ハンドピース２のエアタービン３の圧縮空
気の流量を減少させるためには、第２図に示すごとく、
給気用電磁弁８ａを閉じ、排気用電磁弁８１）を開いて
、エアタンク５内の圧縮空気を消音器１３より大気へ放
出し、エアタンク５内の空気圧力を減少させ、これによ
って流量調整弁６の弁開度を小さくしてエアタービン３
へ流れる 。Further, in order to reduce the flow rate of compressed air of the air turbine 3 of the dental handpiece 2, as shown in FIG.
The air supply solenoid valve 8a is closed, the exhaust solenoid valve 81) is opened, the compressed air in the air tank 5 is released to the atmosphere from the silencer 13, the air pressure in the air tank 5 is reduced, and the flow rate adjustment valve is thereby Air turbine 3 by reducing the valve opening of 6.
flows to.
空気供給流路４の空気流量を減少させることによって行
なわれる。This is done by reducing the air flow rate in the air supply channel 4.
しかし、これら電磁弁８ａ、８ｂのみでは微量な空気流
星の調整を行い難いので、前記給気電磁弁８ａ及び排気
電磁弁８ｂのエアタンク５側に配設された給気用絞り弁
１６ａ及び排気用絞り弁１６ｂを適度な開度に予め調整
することによって、前記電磁弁８ａ、８ｂが開閉されて
もエアタンク５内の空気圧力が急激に上昇又は降下する
ことが無く、微量な空気流量を調整することが可能とな
る。However, since it is difficult to adjust a small amount of air meteor using only these solenoid valves 8a and 8b, the air supply throttle valve 16a and the exhaust air throttle valve 16a disposed on the air tank 5 side of the air supply solenoid valve 8a and the exhaust solenoid valve 8b are By pre-adjusting the throttle valve 16b to an appropriate opening degree, the air pressure in the air tank 5 does not suddenly rise or fall even when the electromagnetic valves 8a, 8b are opened or closed, and a small amount of air flow is adjusted. becomes possible.
しかしながら、このような給気用絞り弁１６ａ及び排気
用絞り弁１６１１を配設した第１の圧力制御流路は単に
給気用電磁弁８ａ及び排気用電磁弁８ｂを開閉しただけ
では、緊急時等においてエアタンク５内の空気圧力を急
速に上昇または降下させることができない。However, the first pressure control channel in which the air supply throttle valve 16a and the exhaust throttle valve 1611 are arranged cannot be used in an emergency by simply opening and closing the air supply solenoid valve 8a and the exhaust solenoid valve 8b. etc., it is not possible to rapidly increase or decrease the air pressure within the air tank 5.
そのために、前記第１の圧力制御流路７ａと別に、第１
の圧力制御流路７ｍの上流側の三叉路１４より分岐して
エアタンク５に通じる三叉路１７を経た後消音器７に至
る第２の圧力制御流路７ｂが設けられている。この第２
の圧力制御流路７ｂの途中に設けられた三叉路１７の他
の一方は接続路７ｃにより前記圧力制御流路７ｍの途中
に設けられた四叉路１５の一つに接続している。そして
前記三叉路１７の上流側には急速給気用電磁弁８Ｃが、
また、下流側には急速排気用電磁弁８ｄがそれぞれ配設
されている。For this purpose, a first pressure control channel 7a is
A second pressure control channel 7b is provided which branches from the three-pronged path 14 on the upstream side of the pressure control channel 7m, passes through a three-pronged path 17 leading to the air tank 5, and then reaches the muffler 7. This second
The other one of the three-pronged paths 17 provided in the middle of the pressure control flow path 7b is connected to one of the four-pronged paths 15 provided in the middle of the pressure control flow path 7m by a connecting path 7c. And on the upstream side of the three-way intersection 17, there is a rapid air supply solenoid valve 8C.
Furthermore, rapid exhaust solenoid valves 8d are provided on the downstream side.
これによって、歯科用エアタービンハンドピース２の始
動時や大幅に流量を増大する時には前記給気用電磁弁８
ａと共に急速給気用電磁弁８Ｃを全開にしてエアタンク
５内に圧縮空気を急速に供給させることができる。また
、歯科用エアタービンハンドピース２の停止時や大幅に
流量を減少する時には前記排気用電磁弁８１〕と共に急
速排気用電磁弁８ｄを全開にして圧縮空気を急速に排気
さぜることができる。As a result, when starting the dental air turbine handpiece 2 or significantly increasing the flow rate, the air supply solenoid valve 8
In conjunction with a, the rapid air supply solenoid valve 8C is fully opened to rapidly supply compressed air into the air tank 5. Further, when the dental air turbine handpiece 2 is stopped or the flow rate is significantly reduced, the rapid exhaust solenoid valve 8d is fully opened together with the exhaust solenoid valve 81] to rapidly exhaust the compressed air. .
その結果、これら急速給気用弁８Ｃ及び急速排気用弁８
ｄを開閉することによりエアタンク５内の空気圧力を急
速に上昇あるいは降下することができ、大幅な流量の変
更の場合や緊急時にはこれら急速給気用弁８ｃ及び急速
排気用弁８ｄを作動させることができる。As a result, these rapid air supply valves 8C and rapid exhaust valves 8
By opening and closing d, the air pressure in the air tank 5 can be rapidly increased or decreased, and in the case of a significant change in flow rate or in an emergency, these rapid air supply valves 8c and rapid exhaust valves 8d can be operated. I can do it.
また、これら給気用電磁弁８ａ、排気用電磁弁８ｂ、急
速給気用電磁弁８Ｃ及び急速排気用電磁弁８ｄはそれぞ
れ配線１８ａ、１８ｂ、１８ｃ、１８ｄにより電磁弁コ
ンＩ・ロール装置１１と電気的に接続されている。そし
て、前記電磁弁８ａ、８ｂ、８ｅ、８ｄの開閉動作は、
この電磁弁コントロール装置１１より発信された電気信
号によって制御され、エアタンク５内に給排気される圧
縮空気の量が調整される。In addition, these air supply solenoid valve 8a, exhaust solenoid valve 8b, rapid air supply solenoid valve 8C, and rapid exhaust solenoid valve 8d are connected to the solenoid valve control I/roll device 11 by wiring 18a, 18b, 18c, and 18d, respectively. electrically connected. The opening and closing operations of the solenoid valves 8a, 8b, 8e, and 8d are as follows:
The amount of compressed air supplied and exhausted into the air tank 5 is controlled by an electric signal transmitted from the electromagnetic valve control device 11.
なお、前記電磁弁コン１〜ロール装置１１は、フートペ
ダルの踏込量を検知してエアタービン回転数の目標値を
設定する可変抵抗器９を添設しており、このフートペダ
ルの踏込量を可変抵抗器９によって検知することにより
、エアタービン回転数の目標値を設定する。The solenoid valve controller 1 to the roll device 11 are equipped with a variable resistor 9 that detects the amount of foot pedal depression and sets a target value of the air turbine rotation speed. The target value of the air turbine rotation speed is set by detecting the air turbine speed using the device 9.
また、電磁弁コントロール装置１１には圧力センサ１０
が接続されており、この圧力センサ１０は空気供給流路
４の流量調整弁６と歯科用ハンドピース２のエアタービ
ン３との間の空気供給流路４の空気圧力を測定し、配線
１９によって圧力センサ１０の測定値を比較値に変換す
る圧力検出回路２１を内蔵する電磁弁コントロール装置
１１にその測定値を電気信号により伝達する。The solenoid valve control device 11 also includes a pressure sensor 10.
The pressure sensor 10 measures the air pressure in the air supply channel 4 between the flow rate regulating valve 6 of the air supply channel 4 and the air turbine 3 of the dental handpiece 2, and The measured value is transmitted as an electric signal to the electromagnetic valve control device 11 which includes a built-in pressure detection circuit 21 that converts the measured value of the pressure sensor 10 into a comparison value.
該電磁弁コントロール装置１１は、第３図に示すごとく
、主として、エアタービン回転数の目標値設定のための
圧力設定回路２０と、圧力センサ１０の測定値を比較値
に変換するための圧力検出回路２１と、これら回路より
発信した信号を比較する設定圧力比較回路２２と、この
比較値の値により切り換える第１の制御回路２３ａ及び
第２の制御回路２３１）と、前記電磁弁８ ａ 、 ８
ｂ 、 ８ ｃ 、 ８ ｄの開閉を行う電磁弁開閉
回路２４ａ、２４ｂ、２４ｃ、２４ｄより構成されてい
る。As shown in FIG. 3, the electromagnetic valve control device 11 mainly includes a pressure setting circuit 20 for setting a target value of the air turbine rotation speed, and a pressure detection circuit for converting the measured value of the pressure sensor 10 into a comparison value. a circuit 21, a set pressure comparison circuit 22 that compares signals transmitted from these circuits, a first control circuit 23a and a second control circuit 231) that are switched depending on the comparison value, and the solenoid valves 8a, 8.
It is composed of electromagnetic valve opening/closing circuits 24a, 24b, 24c, and 24d that open and close the valves b, 8c, and 8d.
この電磁弁コントロール装置１１の制御を具体的に述べ
るならば、前記フートペタルの踏込量を可変抵抗器９に
よって検知し、この検知値を圧力設定回路２０で目標値
として設定し、別途圧力センサ１０により測定した流量
調整弁６と歯科用ハンドピース２のエアタービン３との
間の空気圧力を圧力検出回路２１により比較値に変換し
、前記目標値とこの比較値とを、設定圧力比較回路２２
内で比較して、その偏差がある場合には電磁弁８ａ、８
ｂ、８ｃ、８ｄの開閉動作の指令を伝達する。To describe the control of this electromagnetic valve control device 11 in detail, the amount of depression of the foot petal is detected by the variable resistor 9, this detected value is set as a target value by the pressure setting circuit 20, and the pressure setting circuit 20 sets the detected value as a target value. The measured air pressure between the flow rate regulating valve 6 and the air turbine 3 of the dental handpiece 2 is converted into a comparison value by the pressure detection circuit 21, and the target value and this comparison value are converted into a comparison value by the set pressure comparison circuit 22.
If there is a deviation, the solenoid valves 8a, 8
Transmit commands for opening/closing operations of terminals b, 8c, and 8d.
例えば、作動開始時等における目標値〉〉比較値（初期
値−０）の場合には、まず、圧力設定回路２０で設定さ
れた目標値が設定圧力比較回路２２において比較値と比
較され、その偏差（目標値−比較値）の極性が正のとき
、設定圧力比較回路２２は第１の制御回路２３ａに操作
指令を、また、第２の制御回路２３ｂに停止指令を伝達
する。そして、該偏差が第１の制御回路２３ａにおいて
、予め設定された設定値と比較され、その偏差が第１の
制御回路２３ａの設定値より大きいとき、第１の制御回
路２３ａは給気用電磁弁操作部２４ａ及び急速給気用電
磁弁操作部２４ｃに操作指令を伝達すして、給気用電磁
弁８ａ及び急速給気用電磁弁８ｃを開く。For example, if the target value at the start of operation etc. is the comparison value (initial value - 0), the target value set in the pressure setting circuit 20 is first compared with the comparison value in the set pressure comparison circuit 22, and then When the polarity of the deviation (target value - comparison value) is positive, the set pressure comparison circuit 22 transmits an operation command to the first control circuit 23a and a stop command to the second control circuit 23b. Then, the deviation is compared with a preset setting value in the first control circuit 23a, and when the deviation is larger than the setting value of the first control circuit 23a, the first control circuit 23a An operation command is transmitted to the valve operating section 24a and the rapid air supply solenoid valve operating section 24c to open the air supply solenoid valve 8a and the rapid air supply solenoid valve 8c.
その結果、圧縮空気がエアタンク５内に導入され、エア
タンク５内の圧力を急速上昇させると流量調節弁６が開
き、圧縮空気がエアタービン３に噴射してエアタービン
３を高速回転させる。As a result, compressed air is introduced into the air tank 5, and when the pressure inside the air tank 5 is rapidly increased, the flow control valve 6 is opened, and the compressed air is injected into the air turbine 3, causing the air turbine 3 to rotate at high speed.
この時、圧力センサ１０からの測定値を圧力検出回路２
１により逐次比較値に変換すると共に、その比較値を前
記設定圧力比較回路２２により目標値と比較して、その
ｉ差（目標値−比較値）の極性が正のときには、設定圧
力比較回路２２は前述同様にして、設定圧力比較回路２
２がら第１の制御回路２３ａに操作指令を伝達する。そ
して、該偏差が第１の制御回路２３ａの設定値より小さ
いとき、第１の制御回路２３ａは急速給気用電磁弁操作
部２４ｅに操作指令を伝達して、急速給気用電磁弁８ｃ
を閉じる。また、該偏差が第１の制御回路２３ｎの設定
値より大きいとき、急速給気用電磁弁８ｃは開いたまま
である。さらに、前述と同様にして、設定圧力比較回路
２２により目標値と比較値が比較され、その偏差（目標
値−比較値）の極性が負となると、設定圧力比較回路２
２から第１の制御回路２３ａに停止指令を、また、第２
の制御回路２３ｂに操作指令を伝達する。そして、第１
の制御回路２３ａは急速給気用電磁弁操作部２４ｃによ
り急速給気用電磁弁８Ｃを閉じると共に、第２の制御回
路２３ｂは偏差（１目標値−比較値１）を予め設定され
た値と比較し、該偏差が第２の制御回路２３ｂの設定値
より小さいとき、第２の制＃回路２３ｂは急速排気用電
磁弁操作部２４ｄにより、急速排気用電磁弁８ｄを閉じ
ると共に排気用電磁弁８ｂを開いたままにする。At this time, the measured value from the pressure sensor 10 is sent to the pressure detection circuit 2.
1 into a successive approximation value, and the comparison value is compared with the target value by the set pressure comparison circuit 22. When the polarity of the i difference (target value - comparison value) is positive, the set pressure comparison circuit 22 is set pressure comparison circuit 2 in the same manner as described above.
2 transmits the operation command to the first control circuit 23a. Then, when the deviation is smaller than the set value of the first control circuit 23a, the first control circuit 23a transmits an operation command to the rapid air supply solenoid valve operating section 24e, and controls the rapid air supply solenoid valve 8c.
Close. Further, when the deviation is larger than the set value of the first control circuit 23n, the rapid air supply solenoid valve 8c remains open. Furthermore, in the same way as described above, the set pressure comparison circuit 22 compares the target value and the comparison value, and if the polarity of the deviation (target value - comparison value) becomes negative, the set pressure comparison circuit 22
2 to the first control circuit 23a;
The operation command is transmitted to the control circuit 23b. And the first
The control circuit 23a closes the rapid air supply solenoid valve 8C using the rapid air supply solenoid valve operation part 24c, and the second control circuit 23b sets the deviation (1 target value - comparison value 1) to a preset value. When the deviation is smaller than the set value of the second control circuit 23b, the second control circuit 23b closes the rapid exhaust solenoid valve 8d and closes the exhaust solenoid valve 8d using the rapid exhaust solenoid valve operating section 24d. Leave 8b open.
その結果、エアタンク５内の圧力を一定状態に調整する
ことにより流量調整弁６を制御して、エアタービン３に
供給する圧縮空気を一定状態に調整してエアタービン３
の回転数を一定状態に制御する。As a result, by adjusting the pressure inside the air tank 5 to a constant state, the flow rate adjustment valve 6 is controlled, and the compressed air supplied to the air turbine 3 is adjusted to a constant state.
The rotation speed of the motor is controlled to a constant state.
そして、作業停止時や大幅な流量の変更等の比較値〉〉
目標値（−〇）の場合には、前述と同様にして、設定圧
力比較器２２から第１の制御回路２３ａに停止指令を、
また、第２の制御回路２３ｂに操作指令を伝達して、前
記第１の制御２３ａにより給気用電磁弁８ａを閉じると
共に、前記第２の制御回路２３ｂにより急速排気用電磁
弁８ｂを開く。Comparison values when work is stopped or when there is a significant change in flow rate, etc.
In the case of the target value (-〇), the set pressure comparator 22 issues a stop command to the first control circuit 23a in the same way as described above.
Further, an operation command is transmitted to the second control circuit 23b, and the first control 23a closes the air supply solenoid valve 8a, and the second control circuit 23b opens the rapid exhaust solenoid valve 8b.
その結果、エアタンク５内の圧縮空気を大気放出して流
量調整弁６を閉じ、圧縮空気の供給を停止する。As a result, the compressed air in the air tank 5 is released into the atmosphere, the flow rate adjustment valve 6 is closed, and the supply of compressed air is stopped.
このように、電磁弁コントロール装置１１は、エアター
ビン３の回転数を設定（目標値）することにより、エア
タービン３の回転数を制御するための圧力センサ１０の
測定値を圧力検出回路２１で逐次比較値に変換させると
共に、その比較値を前記設定圧力比較回路２２で目標値
と比較・制御させることにより自動的に目標値に収束さ
せ、エアタービン３の回転数を安定して制御することが
できる。In this manner, the solenoid valve control device 11 sets the rotation speed of the air turbine 3 (target value), and uses the pressure detection circuit 21 to receive the measured value of the pressure sensor 10 for controlling the rotation speed of the air turbine 3. To stably control the rotational speed of the air turbine 3 by converting it into a successive approximation value and by comparing and controlling the comparison value with the target value in the set pressure comparison circuit 22 to automatically converge to the target value. I can do it.
なお、積分回路を形成するエアタンク５と給排気用絞り
弁１６ｇ、１６ｂを流量調整弁６のパイロットポートに
接続することによって、前記給排気電磁弁８ａ、８ｂの
開閉動作による圧縮空気の急激な変動を緩和して、流量
調整弁６による制御を安定させている。By connecting the air tank 5 and supply/exhaust throttle valves 16g, 16b, which form an integral circuit, to the pilot port of the flow rate adjustment valve 6, sudden fluctuations in compressed air caused by the opening/closing operations of the supply/exhaust solenoid valves 8a, 8b can be prevented. is relaxed, thereby stabilizing the control by the flow rate regulating valve 6.
また、エアタンク５の空気供給量及び空気排気量は両電
磁弁８ａ、８ｂの開閉度数及び絞り弁１６ａ。Further, the air supply amount and air exhaust amount of the air tank 5 are determined by the opening/closing frequency of both electromagnetic valves 8a, 8b and the throttle valve 16a.
１６１〕の開度調整の他に、両電磁弁８ａ、８ｂの開閉
時間をタイマー等によって制御することによって調整す
ることもできる。161], the opening/closing time of both electromagnetic valves 8a, 8b can also be adjusted by controlling the opening/closing time using a timer or the like.
（発明の効果）
以上実施例等で詳述したごとく、本発明の歯科用エアタ
ービンハンドピースの回転数制御装置は空気供給流路に
エアタンクの空気圧によって開閉作動する流量調整弁を
設けると共に、該エアタンクに通じる流路に圧縮空気の
供給・排気を制御する電磁弁を配設して、この電磁弁を
電磁弁コントロール装置によって開閉作動させることに
より前記エアタンクに圧縮空気を給排気させ、エアタン
ク内の空気圧力を調整する。(Effects of the Invention) As described in detail in the embodiments and the like, the rotation speed control device for a dental air turbine handpiece of the present invention includes a flow rate regulating valve that is opened and closed by the air pressure of the air tank in the air supply flow path. A solenoid valve that controls the supply and exhaust of compressed air is installed in the flow path leading to the air tank, and the solenoid valve is opened and closed by a solenoid valve control device to supply and exhaust compressed air to the air tank, and the air inside the air tank is Adjust air pressure.
このように前記流量調整弁の弁の開度をエアタンクの空
気圧力により調整することにより、てエアタービンに流
れる圧縮空気の流量を調整することができるので、従来
の流量調整装置のように弁の開度を弁に付設したギヤ装
置で調整していないため、圧縮空気の流量の微調整も行
い易く、弁を開閉するギヤの噛み合わせ音も出ないし、
また、僅かな負荷によってギヤの回転が停止するといっ
たことも起らず、調整性、耐久性及び信頼性のいずれの
点においても問題が無い。In this way, by adjusting the opening degree of the flow rate regulating valve using the air pressure of the air tank, the flow rate of compressed air flowing to the air turbine can be adjusted. Since the opening degree is not adjusted by a gear device attached to the valve, it is easy to make fine adjustments to the flow rate of compressed air, and there is no sound of the gears meshing to open and close the valve.
Furthermore, the rotation of the gear does not stop due to a slight load, and there are no problems in terms of adjustability, durability, and reliability.
したがって、圧縮空気の流量の微調整も行えるので僅か
な流量の変更をすることも可能であり、本発明装置にお
ける流量調整装置は優れたものである。Therefore, since the flow rate of compressed air can be finely adjusted, it is also possible to make slight changes in the flow rate, and the flow rate adjustment device in the apparatus of the present invention is excellent.
そして、圧力制御流路での急激な流量の変動に対しても
、その圧力変化が緩和され、エアタービンハンドピース
への供給空気圧を安定的に保つことができる。Further, even if there is a sudden change in the flow rate in the pressure control channel, the pressure change is alleviated, and the air pressure supplied to the air turbine handpiece can be stably maintained.
第１図は本発明実施例の歯科用エアタービンハンドピー
スの回転数制御装置におけるエアタンク内に圧縮空気を
供給してエアタービンを高速回転させている時の回路図
、第２図は第１図の回転数制御装置のエアタンク内の圧
縮空気を排気してエアタービンを低速回転させている時
の回路図、第３図は制御装置の電磁弁コン１−ロール回
路のブロック図を表わす。
１：空気源
２：歯科用エアタービンハンドピース
３：エアタービン ４：空気供給流路５：エアタン
ク ６：流量調整弁。
７ ａ、 ７ ｂ：圧力制御流路８ａ：給気用電磁弁８
ｂ：排気用電磁弁 ８Ｃ：急速給気用電磁弁８ｄ、急
速排気用電磁弁
９：可変抵抗器 １０：圧力センサ１１：電磁弁＝
７ントロール装置・
１２．１４．１７：三叉路
１３：消音器 １５：四叉路
１６ａ：給気用絞り弁
１６ｂ：排気用絞り弁
１８ａ、１８１＋、１８ｃ、１８ｄ：配線１９：配線
２０：圧力設定回路２１：圧力検出回路
２２二設定圧力比較回路２３ａ：第１の制御回路 ２３
ｂ：第２の制御回路２４ａ：給気用電磁弁操作部
２４ｂ：排気用電磁弁操作部Fig. 1 is a circuit diagram of a dental air turbine handpiece rotation speed control device according to an embodiment of the present invention when compressed air is supplied into the air tank to rotate the air turbine at high speed, and Fig. 2 is the circuit diagram shown in Fig. 1. FIG. 3 is a block diagram of the electromagnetic valve controller 1-roll circuit of the control device. 1: Air source 2: Dental air turbine handpiece 3: Air turbine 4: Air supply channel 5: Air tank 6: Flow rate adjustment valve. 7 a, 7 b: Pressure control flow path 8 a: Air supply solenoid valve 8
b: Exhaust solenoid valve 8C: Rapid air supply solenoid valve 8d, rapid exhaust solenoid valve 9: Variable resistor 10: Pressure sensor 11: Solenoid valve =
7 control device・12.14.17: Three-way intersection 13: Silencer 15: Four-way intersection 16a: Air supply throttle valve 16b: Exhaust throttle valve 18a, 181+, 18c, 18d: Wiring 19: Wiring
20: Pressure setting circuit 21: Pressure detection circuit
22 Second set pressure comparison circuit 23a: first control circuit 23
b: Second control circuit 24a: Air supply solenoid valve operating section 24b: Exhaust solenoid valve operating section
Claims (1)
ービンハンドピースの間の空気供給流路の途中に設けた
流量調整弁の弁開度を調整し、エアタービンに流れる空
気量を制御することによって、エアタービンの回転数を
制御する歯科用エアタービンハンドピースの回転数制御
装置において、前記流量調整弁のパイロットポートにエ
アタンクを接続し、かつ前記空気供給流路の流量調整弁
の上流より分岐して前記エアタンクを介して消音器に至
る第１及び第２の圧力制御流路を設け、この第１の圧力
制御流路におけるエアタンクの上流側には給気用電磁弁
及び給気用絞り弁を、また下流側には排気用絞り弁及び
排気用電磁弁を配設すると共に、第２の圧力制御流路に
おけるエアタンクの上流側には急速給気用電磁弁を、ま
た下流側には急速排気用電磁弁を配設して、さらに前記
フートペダルの踏込量を検知してエアタービンの回転数
の目標値を設定する可変抵抗器を設け、そして該目標値
と、前記流量調整弁と歯科用エアタービンハンドピース
との間の空気供給流路の途中に設けた圧力センサによっ
て測定された測定値とを比較して前記各種電磁弁の開閉
動作を制御する電磁弁コントロール装置とを設けて構成
したことを特徴とする歯科用エアタービンハンドピース
の回転数制御装置。By controlling the amount of air flowing into the air turbine by adjusting the valve opening of the flow rate regulating valve installed in the middle of the air supply flow path between the air source and the dental air turbine handpiece by the pressing force of the foot pedal, In a rotation speed control device for a dental air turbine handpiece that controls the rotation speed of an air turbine, an air tank is connected to a pilot port of the flow rate adjustment valve, and the air supply flow path is branched from upstream of the flow rate adjustment valve. First and second pressure control flow paths leading to the silencer via the air tank are provided, and an air supply solenoid valve and an air supply throttle valve are provided on the upstream side of the air tank in the first pressure control flow path, In addition, an exhaust throttle valve and an exhaust solenoid valve are installed on the downstream side, and a quick air supply solenoid valve is installed on the upstream side of the air tank in the second pressure control channel, and a quick exhaust solenoid valve is installed on the downstream side. A solenoid valve is provided, and a variable resistor is further provided to detect the amount of depression of the foot pedal and set a target value of the rotation speed of the air turbine, and the target value, the flow rate adjustment valve, and the dental air turbine are connected to each other. and a solenoid valve control device that controls the opening and closing operations of the various solenoid valves by comparing the values measured by a pressure sensor provided in the middle of the air supply flow path between the handpiece and the handpiece. Features: Rotation speed control device for dental air turbine handpieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297886A JPH069575B2 (en) | 1986-01-25 | 1986-01-25 | Dental Air Turbine Hand Piece Rotation Speed Controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297886A JPH069575B2 (en) | 1986-01-25 | 1986-01-25 | Dental Air Turbine Hand Piece Rotation Speed Controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62172943A true JPS62172943A (en) | 1987-07-29 |
| JPH069575B2 JPH069575B2 (en) | 1994-02-09 |
Family
ID=11820307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297886A Expired - Lifetime JPH069575B2 (en) | 1986-01-25 | 1986-01-25 | Dental Air Turbine Hand Piece Rotation Speed Controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069575B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007185269A (en) * | 2006-01-12 | 2007-07-26 | Osada Res Inst Ltd | Dental water and/or air supplying device |
| JP2013208482A (en) * | 2010-11-05 | 2013-10-10 | W & H Dentalwerk Buermoos Gmbh | Fluid driven hand grip for medical treatment, especially dental treatment |
| JP2014083447A (en) * | 2012-10-25 | 2014-05-12 | W & H Dentalwerk Buermoos Gmbh | Method for controlling and/or feedback controlling medical driver driven by compression gas, and driver of this type |
| JP2018509302A (en) * | 2015-01-23 | 2018-04-05 | コリブリ スピンドルズ リミテッド | Machining center, fluid-driven spindle system, machining center conversion kit, and method of using wireless sensors for access control |
-
1986
- 1986-01-25 JP JP1297886A patent/JPH069575B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007185269A (en) * | 2006-01-12 | 2007-07-26 | Osada Res Inst Ltd | Dental water and/or air supplying device |
| JP2013208482A (en) * | 2010-11-05 | 2013-10-10 | W & H Dentalwerk Buermoos Gmbh | Fluid driven hand grip for medical treatment, especially dental treatment |
| US9784289B2 (en) | 2010-11-05 | 2017-10-10 | W&H Dentalwerk Bürmoos GmbH | Fluid-driven medical or dental handle |
| JP2014083447A (en) * | 2012-10-25 | 2014-05-12 | W & H Dentalwerk Buermoos Gmbh | Method for controlling and/or feedback controlling medical driver driven by compression gas, and driver of this type |
| CN104736099A (en) * | 2012-10-25 | 2015-06-24 | W和H牙科产品比莫斯有限公司 | Method for controlling a medical drive device which can be operated with pressurized gas and such a drive device |
| JP2016047269A (en) * | 2012-10-25 | 2016-04-07 | ヴェー ウント ハー デンタルヴェルク ビュールモース ゲーエムベーハー | Method for controlling and/or feedback controlling medical driving device driven by compressed gas, and driving device |
| US9668752B2 (en) | 2012-10-25 | 2017-06-06 | W&H Dentalwerk Bürmoos GmbH | Method for controlling and/or regulating a compressed-gas-operable medical drive device and such a drive device |
| CN104736099B (en) * | 2012-10-25 | 2018-09-28 | W和H牙科产品比莫斯有限公司 | Method for controlling and/or regulating the operable medical driving device of compressed gas and this kind of driving device |
| JP2018509302A (en) * | 2015-01-23 | 2018-04-05 | コリブリ スピンドルズ リミテッド | Machining center, fluid-driven spindle system, machining center conversion kit, and method of using wireless sensors for access control |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH069575B2 (en) | 1994-02-09 |
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