JPH0324172Y2 - - Google Patents
Info
- Publication number
- JPH0324172Y2 JPH0324172Y2 JP1985126013U JP12601385U JPH0324172Y2 JP H0324172 Y2 JPH0324172 Y2 JP H0324172Y2 JP 1985126013 U JP1985126013 U JP 1985126013U JP 12601385 U JP12601385 U JP 12601385U JP H0324172 Y2 JPH0324172 Y2 JP H0324172Y2
- Authority
- JP
- Japan
- Prior art keywords
- cutter
- cutting tool
- opening
- stop
- closing body
- 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.)
- Expired
Links
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
【考案の詳細な説明】
(産業上の利用分野)
本考案は、回転軸に刃具を着脱自在に取り付け
るためのチヤツクに関するもので、このチヤツク
は主として歯科治療器具の回転軸に取り付けるも
のである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a chuck for detachably attaching a cutting tool to a rotating shaft, and this chuck is mainly attached to the rotating shaft of a dental treatment instrument.
(従来の技術)
従来、チヤツクの止体は、止体と共に回転
軸に装着するコイルバネの伸張力によつて閉じる
ようになつている。(Prior Art) Conventionally, a stopper of a chuck is closed by the tension of a coil spring attached to a rotating shaft together with the stopper.
(考案が解決しようとする問題点)
そこで、止体の止力を強くするためにコイ
ルバネの線材の径を太くすると、歯科用治療器械
のコントラヘツドのように回転軸の径が小さいも
のでは、チヤツクが収容できなくなる問題があつ
た。(Problem that the invention aims to solve) Therefore, if the diameter of the wire of the coil spring is increased in order to strengthen the stopping force of the stopper, it is possible to There was a problem where the chuck could not be accommodated.
又、コイルバネは重量バランスが不揃いなの
で、回転軸が高速回転するコントラヘツド等で
は、回転軸の回転斑、軸受の異常摩耗等を発生す
る問題があつた。 In addition, since the weight balance of coil springs is uneven, problems such as uneven rotation of the rotating shaft and abnormal wear of the bearings occur in contra heads where the rotating shaft rotates at high speed.
本考案はこれ等の問題に鑑みてなされたもの
で、コイルバネを使用することなく止力が得ら
れると共に、開閉が簡単且つ迅速に行えるチヤツ
クを提供することを目的とするものである。 The present invention was devised in view of these problems and aims to provide a chuck that can provide a stopping force without using a coil spring and that can be opened and closed easily and quickly.
(問題点を解決するための手段)
本願考案は、内径が刃具の外径よりも小さく形
成されると共に、複数の溝穴が中心線方向に切ら
れた刃具止部を一方の開口端部に、外径が回転
軸の刃具挿通端部の内径よりも僅かに大きく形成
された刃具挿通部を他方の開口端部にそれぞれ設
けた筒状の止体と、自由端側が細くなるように
中心線方向に対して傾斜した傾斜面が両側に設け
られている複数の楔部を一方の開口端に突設した
筒状の開閉体と、一方の開口端部から挿入した
止体の刃具挿通部を一方の開口端部に圧入、固定
することにより、止体の刃具止部を放射方向
に偏移自在に内装すると共に、他方の開口端部か
ら挿入した開閉体を中心線方向に移動自在に保持
する筒状の回転軸とからなるものである。(Means for Solving the Problems) The present invention has a cutter stop that has an inner diameter smaller than the outer diameter of the cutter and has a plurality of slots cut in the direction of the center line at one opening end. , a cylindrical stopper with a cutter insertion part whose outer diameter is slightly larger than the inner diameter of the cutter insertion end of the rotating shaft at the other open end, and a center line so that the free end side becomes thinner. A cylindrical opening/closing body with a plurality of wedges protruding from one opening end, each side of which is provided with an inclined surface inclined with respect to the direction, and a cutter insertion portion of the stop body inserted from one opening end. By press-fitting and fixing into one open end, the cutter stop part of the stop body can be moved in the radial direction, and the opening/closing body inserted from the other open end can be held movably in the center line direction. It consists of a cylindrical rotating shaft.
(作用)
開閉体を押圧して開閉体の楔部を止体の復元
力に抗して溝穴に圧入すると、止体の刃具止
部が放射方向に押し開かれて、刃具が挿脱でき、
開閉体を解放すると、止体の刃具止部が止
体の復元力によつて開閉体の楔部を溝穴から押し
出しながら、刃具の外周壁面に圧接して、刃具を
止する。(Function) When the opening/closing body is pressed and the wedge part of the opening/closing body is pressed into the slot against the restoring force of the stop body, the cutter stop part of the stop body is pushed open in the radial direction and the cutter cannot be inserted or removed. ,
When the opening/closing body is released, the cutting tool stopping portion of the stopping body pushes out the wedge portion of the opening/closing body from the slot due to the restoring force of the stopping body, and comes into pressure contact with the outer circumferential wall surface of the cutting tool, thereby stopping the cutting tool.
(実施例)
以下、本考案の実施例を図面により詳細に説明
する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
図は本考案の一実施例を具備した歯科用コント
ラヘツドの構成を示すもので、1は、内径を一段
小さく形成した刃具挿通端部1aを一方の開口端
部に、内周にネジを切つた開閉体操作端部1bを
他方の開口端部にそれぞれ設けた略円筒状の回転
軸で、この回転軸1はヘツドケース2に軸受3を
介して回動自在に取り付けられている。4は回転
軸1の中間部外周壁面上に放射方向に突設した歯
車、5は、刃具16(点線で図示)の外径よりも
若干小さくなるように内径が一段小さく形成され
ると共に、複数の溝穴6が中心線方向に切られた
刃具止部5aを一方の開口端部に、刃具挿通端
部1aの内径よりも僅かに大きくなるように外径
が一段大きく形成された刃具挿通部5bを他方の
開口端部にそれぞれ設けた略円筒状の止体で、
この止体5は、回転軸1の中に挿入して、刃具
挿通端部1aに刃具挿通部5bを圧入、固定する
と、回転軸1の内周壁面と刃具止部5aの外周
壁面との間に間隙が形設されて、刃具止部5a
が放射方向に偏移可能な状態で回転軸1の中に取
り付けられる。7は自由端側が細くなるように中
心線方向に対して傾斜した傾斜面7aが両側に設
けられている複数のVの字状の楔部7bを一方の
開口端に突設した筒状の開閉体で、この開閉体7
は回転軸1の開閉体操作端部1bの側に中心線方
向に移動自在に保持される。8は回転軸1の開閉
体操作端部1bの内側に螺着する抜止めリング
で、この抜止めリング8は、開閉体操作端部1b
へのねじ込み量を調節することにより、回転軸1
の中を移動する開閉体7の楔部7bが溝穴6から
抜け出るのを防止する。9はヘツドケース2の中
に回転軸1及び軸受3を挿入する側の開閉体操作
端部2aを覆うヘツドカバー、10は、ヘツドカ
バー9を回転軸1の中心線方向に移動自在に保持
する取付リングで、この取付リング10はヘツド
ケース2の開閉体操作端部2aの内側に螺着され
る。11は回転軸1をヘツドケース2の中の所定
の位置に固定する抜止めリングで、この抜止めリ
ング11は取付リング10の内側に螺着される。
12はヘツドカバー9と抜止めリング11との間
に介装するコイルバネで、このコイルバネ12は
その伸張力によつてヘツドカバー9を開閉体7か
ら離隔する方向、即ち図中上方に付勢する。13
は中心線が回転軸1の中心線と直交するように配
設された動力伝達軸、14は、ヘツドケース2と
動力伝達軸13との間に介装されて、動力伝達軸
13を回動自在に軸支する軸受、15は動力伝達
軸13の先端に固着した歯車で、この歯車15は
歯車4に噛合しており、動力伝達軸13が駆動さ
れると回転軸1が回動する。 The figure shows the configuration of a dental contrahead equipped with an embodiment of the present invention. 1 shows a cutting tool insertion end 1a formed with a smaller inner diameter at one open end, and a thread cut on the inner periphery. The rotating shaft 1 is a substantially cylindrical shaft having a cylindrical opening/closing body operation end 1b provided at the other open end, and is rotatably attached to a head case 2 via a bearing 3. 4 is a gear protruding in the radial direction on the outer circumferential wall surface of the intermediate portion of the rotating shaft 1; 5 is a gear whose inner diameter is slightly smaller than the outer diameter of the cutting tool 16 (indicated by a dotted line); The cutter insertion part has a cutter stop part 5a in which a slot 6 is cut in the center line direction at one open end, and the outer diameter is formed one step larger than the inner diameter of the cutter insertion end part 1a. 5b is provided at the other open end, each having a substantially cylindrical shape,
When this stopper 5 is inserted into the rotary shaft 1 and the cutter insertion part 5b is press-fitted and fixed to the cutter insertion end 1a, the stopper 5 is formed between the inner circumferential wall surface of the rotary shaft 1 and the outer circumferential wall surface of the cutter stopper part 5a. A gap is formed in the cutter stop portion 5a.
is mounted in the rotating shaft 1 in a radially displaceable manner. Reference numeral 7 denotes a cylindrical opening/closing device having a plurality of V-shaped wedge portions 7b protruding from one opening end and having inclined surfaces 7a inclined with respect to the center line direction on both sides so that the free end side becomes narrower. With the body, this opening/closing body 7
is held on the side of the opening/closing body operating end 1b of the rotating shaft 1 so as to be movable in the direction of the center line. Reference numeral 8 denotes a retaining ring screwed onto the inside of the opening/closing body operating end 1b of the rotating shaft 1;
By adjusting the screwing amount to
This prevents the wedge part 7b of the opening/closing body 7 moving inside the slot from coming out of the slot 6. 9 is a head cover that covers the operating end 2a of the opening/closing body on the side where the rotating shaft 1 and bearing 3 are inserted into the head case 2; 10 is a mounting ring that holds the head cover 9 movably in the direction of the center line of the rotating shaft 1; This attachment ring 10 is screwed onto the inside of the opening/closing body operating end 2a of the head case 2. Reference numeral 11 denotes a retaining ring for fixing the rotary shaft 1 at a predetermined position in the head case 2, and the retaining ring 11 is screwed inside the mounting ring 10.
Reference numeral 12 denotes a coil spring interposed between the head cover 9 and the retaining ring 11, and the coil spring 12 biases the head cover 9 away from the opening/closing body 7, that is, upward in the figure, by its tension. 13
14 is a power transmission shaft disposed so that its center line is orthogonal to the center line of the rotating shaft 1; A bearing 15 is a gear fixed to the tip of the power transmission shaft 13. This gear 15 meshes with the gear 4, and when the power transmission shaft 13 is driven, the rotating shaft 1 rotates.
このように構成された本実施例では、コイルバ
ネ12の伸張力に抗して、使用者の指でヘツドカ
バー9をヘツドケース2の中に押し込んで、ヘツ
ドカバー9を開閉体7に当接させた上、更にヘツ
ドカバー9を開閉体7と共にヘツドケース2の中
に押し込んで、楔部7bを溝穴6の中に圧入する
と、止体5の刃具止部5aが傾斜面7aによ
つて放射方向に偏移させられて、所謂チヤツクが
開いた状態になり、刃具16が挿脱できるように
なる。 In this embodiment configured as described above, the head cover 9 is pushed into the head case 2 with the user's fingers against the tension force of the coil spring 12, and the head cover 9 is brought into contact with the opening/closing body 7. When the head cover 9 is further pushed into the head case 2 together with the opening/closing body 7 and the wedge portion 7b is press-fitted into the slot 6, the cutter stop portion 5a of the stop body 5 is displaced in the radial direction by the inclined surface 7a. The so-called chuck is opened, and the cutter 16 can be inserted and removed.
又、ヘツドカバー9から使用者の指を離して、
ヘツドカバー9に加えていた力を取り去ると、ヘ
ツドカバー9はコイルバネ12の伸張力によつて
図中上方に押し上げられて、元の位置に復帰する
と共に、止体5の刃具止部5aは、その復元
力により、開閉体7を図中上方に押し出しなが
ら、刃具16の外周壁面に圧接して、所謂チヤツ
クが閉じた状態になり、刃具16は止体5によ
つて点線で図示した如く止される。 Also, remove the user's fingers from the head cover 9,
When the force applied to the head cover 9 is removed, the head cover 9 is pushed upward in the figure by the tension of the coil spring 12 and returns to its original position, and the cutter stopper 5a of the stopper 5 returns to its original position. The force pushes the opening/closing body 7 upward in the figure and brings it into pressure contact with the outer peripheral wall surface of the cutting tool 16, so that the so-called chuck is closed, and the cutting tool 16 is stopped by the stopper 5 as shown by the dotted line in the drawing. .
(考案の効果)
以上説明したように、本考案によれば、止体
の復元力を刃具を止する力としてそのまま使用
できるので、回転軸の径を大きくすることなく
止力を強くでき、又、止体及び開閉体の重量バ
ランスを揃えることが設計的に容易なので、回転
軸が高速回転するコントラヘツド等において回転
軸の回転斑、軸受の異常摩耗等がほとんど発生し
なくなつて、従来例の欠点が解消できるという効
果を奏する。(Effects of the invention) As explained above, according to the invention, the restoring force of the stop body can be used as is as the force for stopping the cutting tool, so the stopping force can be strengthened without increasing the diameter of the rotating shaft, and Since it is easy to design the weight balance of the stopper body and the opening/closing body, uneven rotation of the rotary shaft and abnormal wear of the bearings hardly occur in contraheads where the rotary shaft rotates at high speed. This has the effect of eliminating the drawbacks of
その上、止体の中心方向への復元力を刃具を
止する力としてそのまま使用できるので、開閉
体の楔部を止体の溝穴に圧入すると、止体の
刃具止部が開き、開閉体を解放すると、止体
の刃具止部が開閉体の楔部を溝穴から押し出し
ながら閉じて、刃具の着脱が簡単、迅速且つ確実
にできるという効果を奏するもので、この効果
は、異なる種類、異なる径の刃具を頻繁に取り替
えて治療する歯科治療器具等において、歯科治療
器具等の操作性を向上させるという観点から非常
に重要である。 In addition, the restoring force in the direction of the center of the stopper body can be used directly as a force for stopping the cutter, so when the wedge part of the opening/closing body is press-fitted into the slot of the stopper body, the cutter retaining part of the stopper body opens and the opening/closing body When released, the cutter stop part of the stop body closes while pushing out the wedge part of the opening/closing body from the slot, producing the effect that the cutter can be attached and detached easily, quickly and reliably. This is very important from the viewpoint of improving the operability of dental treatment instruments, etc., where cutting tools of different diameters are frequently replaced for treatment.
図は本考案の一実施例を具備した歯科用コント
ラヘツドの中央縦断面図である。
1……回転軸、1a……刃具挿通端部、1b…
…開閉体操作端部、2……ヘツドケース、2a…
…開閉体操作端部、5……止体、5a……刃具
止部、5b……刃具挿通部、6……溝穴、7…
…開閉体、7a……傾斜面、7b……楔部。
The figure is a central vertical cross-sectional view of a dental contra head equipped with an embodiment of the present invention. 1... Rotating shaft, 1a... Cutting tool insertion end, 1b...
... Opening/closing body operating end, 2... Head case, 2a...
... Opening/closing body operation end, 5... Stop body, 5a... Cutting tool stopping part, 5b... Cutting tool insertion part, 6... Slot, 7...
... Opening/closing body, 7a... Inclined surface, 7b... Wedge portion.
Claims (1)
刃具を着脱自在に取り付けるチヤツクにおいて、 内径が前記刃具の外径よりも小さく形成される
と共に、複数の溝穴が中心線方向に切られた刃具
止部を一方の開口端部に、外径が前記回転軸の
刃具挿通端部の内径よりも僅かに大きく形成され
た刃具挿通部を他方の開口端部にそれぞれ設けた
筒状の止体と、 自由端側が細くなるように中心線方向に対して
傾斜した傾斜面が両側に設けられている複数の楔
部を一方の開口端に突設した筒状の開閉体と、 一方の開口端部から挿入した前記止体の刃具
挿通部を前記一方の開口端部に圧入、固定するこ
とにより、前記止体の刃具止部を放射方向に
偏移自在に内装すると共に、他方の開口端部から
挿入した前記開閉体を中心線方向に移動自在に保
持する筒状の前記回転軸とからなり、 前記開閉体を押圧して前記開閉体の楔部を前記
止体の復元力に抗して前記溝穴に圧入すると、
前記止体の刃具止部が放射方向に押し開かれ
て、前記刃具が挿脱でき、前記開閉体を解放する
と、前記止体の刃具止部が前記止体の復元
力によつて前記開閉体の楔部を前記溝穴から押し
出しながら、前記刃具の外周壁面に圧接して、前
記刃具を止することを特徴とするチヤツク。[Scope of Claim for Utility Model Registration] A chuck for removably attaching a cutting tool to a rotary shaft rotatably housed in a head case, the inner diameter of which is smaller than the outer diameter of the cutting tool, and a plurality of slotted holes located at the center of the chuck. A cutting tool stop portion cut in the linear direction is provided at one opening end, and a cutting tool insertion portion whose outer diameter is slightly larger than the inner diameter of the cutting tool insertion end of the rotating shaft is provided at the other opening end. A cylindrical opening/closing body having a cylindrical stop body and a plurality of wedge parts protruding from one open end, each of which has a plurality of wedge parts on both sides having sloped surfaces that are inclined with respect to the center line direction so that the free end side becomes thinner. and, by press-fitting and fixing the cutter insertion portion of the stopper inserted from one open end into the one open end, the cutter stopper of the stopper is internally movable in the radial direction, and , and the cylindrical rotating shaft that holds the opening/closing body inserted from the other opening end so as to be movable in the center line direction; When pressed into the slot against the restoring force,
When the cutter stop part of the stop body is pushed open in the radial direction to allow the cutter to be inserted and removed and the opening/closing body is released, the cutter stop part of the stop body is pushed open by the restoring force of the stop body to allow the cutter to be inserted and removed. The chuck is characterized in that the wedge part is pushed out of the slot and pressed against the outer peripheral wall surface of the cutting tool to stop the cutting tool.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985126013U JPH0324172Y2 (en) | 1985-08-20 | 1985-08-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1985126013U JPH0324172Y2 (en) | 1985-08-20 | 1985-08-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6233817U JPS6233817U (en) | 1987-02-27 |
JPH0324172Y2 true JPH0324172Y2 (en) | 1991-05-27 |
Family
ID=31019421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1985126013U Expired JPH0324172Y2 (en) | 1985-08-20 | 1985-08-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0324172Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1733696B1 (en) * | 2005-06-15 | 2008-04-16 | Bien-Air Holding SA | Handpiece for dental or surgical use with an elastic collet |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5714808U (en) * | 1980-06-19 | 1982-01-26 |
-
1985
- 1985-08-20 JP JP1985126013U patent/JPH0324172Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5714808U (en) * | 1980-06-19 | 1982-01-26 |
Also Published As
Publication number | Publication date |
---|---|
JPS6233817U (en) | 1987-02-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2534318B2 (en) | Anti-vibration handle for power tools | |
JPH081805Y2 (en) | Tool attachment / detachment device | |
CA2316753A1 (en) | Tool holder and a runout correcting tool for a tool holder | |
US5823078A (en) | Precision screwdriver equipped with a rotatable cap | |
JPH0324172Y2 (en) | ||
JPH0777565B2 (en) | Hair removal device | |
JP2549926Y2 (en) | Clamping device | |
JPH0525781Y2 (en) | ||
JPH065773Y2 (en) | Chuck | |
JPS6015538Y2 (en) | Chuck for dental treatment instruments | |
EP0634148B1 (en) | Dental handpiece having cover member preventing mistaken operation | |
CN110919082A (en) | Holder assembly for circular saw blade | |
JP3043932B2 (en) | Chuck mechanism | |
JPS63123678A (en) | Impact tool | |
JPS6125775Y2 (en) | ||
JPS6110650Y2 (en) | ||
JP4486192B2 (en) | Nose hair cutter | |
JPS6125774Y2 (en) | ||
JP3641305B2 (en) | Bar feeder for bar feeder | |
JPS6221369Y2 (en) | ||
JPS607692Y2 (en) | Dust-proof cover for the tip of a handpiece for dental treatment | |
JPS6310244Y2 (en) | ||
JPH0115380Y2 (en) | ||
JPH08130959A (en) | Brush cutter | |
JP3126887B2 (en) | Chuck mechanism |