JP2562883B2 - Holder - Google Patents

Holder

Info

Publication number
JP2562883B2
JP2562883B2 JP61312785A JP31278586A JP2562883B2 JP 2562883 B2 JP2562883 B2 JP 2562883B2 JP 61312785 A JP61312785 A JP 61312785A JP 31278586 A JP31278586 A JP 31278586A JP 2562883 B2 JP2562883 B2 JP 2562883B2
Authority
JP
Japan
Prior art keywords
positioning
cylinder
main body
tightening
ring
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 - Fee Related
Application number
JP61312785A
Other languages
Japanese (ja)
Other versions
JPS63169205A (en
Inventor
勉 内藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NT Tool Corp
Original Assignee
NT Tool Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NT Tool Corp filed Critical NT Tool Corp
Priority to JP61312785A priority Critical patent/JP2562883B2/en
Publication of JPS63169205A publication Critical patent/JPS63169205A/en
Application granted granted Critical
Publication of JP2562883B2 publication Critical patent/JP2562883B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02Chucks
    • B23B31/10Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/117Retention by friction only, e.g. using springs, resilient sleeves, tapers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、工作機械において、ドリル等の工具又は
加工すべき被加工物等の被保持物を保持するようにした
保持具に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool for holding a tool such as a drill or a workpiece such as a workpiece to be machined in a machine tool. .

(従来の技術) 従来の保持具にあっては、本来の締着筒の外周に回動
筒を相対回動自在に嵌合させ、その回動筒を締付方向へ
回転させることによって回動筒を締着筒の太径側へ移動
させて被保持物を締付けるようにしてあるので、回動筒
の回転抵抗によって締付度合を判断しなければならず、
操作する人によって締付力にバラツキを生じると共に、
回動筒を強く回し過ぎて回動筒や締着筒の摩耗が多くな
り、寿命が短くなる問題点があった。
(Prior Art) In a conventional holder, a rotary cylinder is fitted to the outer periphery of an original fastening cylinder so as to be relatively rotatable, and the rotary cylinder is rotated by rotating in the tightening direction. Since the object to be held is tightened by moving the cylinder to the larger diameter side of the tightening cylinder, it is necessary to judge the degree of tightening by the rotation resistance of the rotating cylinder.
The tightening force varies depending on the operator,
There is a problem in that the rotating cylinder is excessively turned too much, the rotating cylinder and the fastening cylinder are often worn, and the service life is shortened.

また上記回動筒と本体に夫々位置決め部を設け、その
一方の位置決め部を他方の位置決め部に当接させて締付
け過ぎを防ぐようにしたものも知られているが、そのよ
うなものでは回動筒を締付方向へ充分に回動させた状態
で、回動筒や締着筒の摩耗等によって締付けにゆるみを
生じると、使用中、回動筒が不則的に戻り回動して、締
着筒の把握力が弱まる問題点があった。
It is also known that the rotating cylinder and the main body are provided with positioning portions respectively, and one of the positioning portions is brought into contact with the other positioning portion to prevent over-tightening. If the moving cylinder is fully rotated in the tightening direction and loosening occurs due to wear of the rotating cylinder or the fastening cylinder, the rotating cylinder will return and rotate irregularly during use. However, there was a problem that the grasping power of the fastening cylinder was weakened.

(発明が解決しようとする問題点) 上記の「戻り回転」を防止する為に、例えば実開昭57
−79218号公報で知られるような、両面に凹凸歯のある
戻り止め用座金を介設することが考えられる。しかし、
これを用いると、回動筒の対抗面と、本体の位置決め部
とは、上記凹凸歯のある座金を介して噛合い、ロックさ
れて、「戻り止め」の目的は達成できるが、作業終了
後、回動筒を逆回しすることができなくなり、回動筒を
破損させる問題点が発生する。
(Problems to be Solved by the Invention) In order to prevent the above "return rotation", for example,
It is conceivable to interpose a detent washer having concave and convex teeth on both sides, as known from Japanese Patent No. 79218. But,
If this is used, the opposing surface of the rotating cylinder and the positioning portion of the main body are engaged and locked through the washer having the uneven teeth, and the purpose of "detent" can be achieved, but after the work is completed. However, it becomes impossible to reversely rotate the rotating cylinder, which causes a problem of damaging the rotating cylinder.

この発明は上記従来の問題点を除き、回動筒の回転に
よる被保持物の締付を正確に行うことができ、しかも、
回動筒を戻すときは比較的軽い力で回動筒を壊すことな
く戻すことができるようにした保持具を提供しようとす
るものである。
Except for the above-mentioned conventional problems, the present invention is capable of accurately tightening an object to be held by rotating the rotary cylinder, and moreover,
An object of the present invention is to provide a holder that can return the rotary cylinder with a comparatively light force without breaking the rotary cylinder.

(問題点を解決する為の手段) 本願発明の保持具は、保持具の本体における軸心方向
の一端には半径方向に弾性変形可能な中空の筒状で、し
かも一端が開口した被保持物の差込孔となっており、か
つ外周面は本体寄が太径となるテーパー面となっている
締着筒を、本体と同軸上でかつ本体に対して一体的に備
えさせ、上記締着筒の周囲には回動筒を相対回動可能に
配設すると共に、本体と上記回動筒にあっては、上記回
動筒が本体側に寄り過ぎるのを防止する為の位置決め部
を回動筒の軸線方向で相対向する位置に備えさせ、上記
回動筒を締着筒の太径側へ移動させることによって締着
筒を収縮させ、回動筒の位置決め部を本体の位置決め部
に当接させることによって回動筒による締付を完了する
ようにしてある保持具において、上記回動筒の位置決め
部と本体の位置決め部との間には、一方は上記軸心方向
に弾力性を備えている環状体でかつ表面には円周方向に
複数の凸部を備えている位置決め環と、他方は上記位置
決め環の表面における凸部と対向する位置に配置される
ようにしてある位置決め片とより成る一対の位置決め具
を介在させ、上記位置決め具の一方は本体に、他方は回
動筒に夫々回り止めさせ、しかも、位置決め具における
位置決め環の回り止めの構成は、位置決め環と、回り止
めの相手方の位置決め部との間にボールを介在させると
共に、上記位置決め環と、上記相手方の位置決め部に
は、上記ボールが周方向に移動するのを阻止する為のボ
ール収容孔と、周方向に長く形成した溝状の切欠部とを
設けて一定区間での相対回動を可能に構成し、さらに、
上記の位置決め環と位置決め片との関係位置は回動筒を
締付完了位置迄締着筒の太径側へ移動させた時点で位置
決め環の凸部相互間に位置決め片が位置するように設定
したのである。
(Means for Solving the Problems) A holder according to the present invention is an object to be held, which has a hollow cylindrical shape which is elastically deformable in the radial direction at one end of the main body of the holder in the axial direction and which is open at one end. , And the outer peripheral surface is a tapered surface with a larger diameter toward the main body. A rotary cylinder is disposed around the cylinder so as to be rotatable relative to the main body and the rotary cylinder, and a positioning portion for preventing the rotary cylinder from being excessively close to the main body is rotated. The moving cylinder is provided at positions opposite to each other in the axial direction, and the rotating cylinder is contracted by moving the rotating cylinder to the larger diameter side of the tightening cylinder, and the positioning portion of the rotating cylinder serves as the positioning portion of the main body. A holder in which the tightening by the rotating cylinder is completed by contacting the rotating cylinder. Between the positioning portion of the main body and the positioning portion of the main body, one is an annular body having elasticity in the axial direction and a positioning ring having a plurality of convex portions in the circumferential direction on the surface, The other one interposes a pair of positioning tools consisting of positioning pieces arranged so as to be opposed to the convex portions on the surface of the positioning ring, one of the positioning tools being the main body, and the other being the rotating cylinder. The positioning ring is configured to prevent the rotation of the positioning ring and the positioning ring of the positioning ring in the positioning tool. Is provided with a ball accommodating hole for preventing the ball from moving in the circumferential direction, and a groove-shaped notch formed in the circumferential direction so as to be capable of relative rotation in a certain section, further,
The relative position between the positioning ring and the positioning piece is set so that the positioning piece is located between the convex portions of the positioning ring when the rotating cylinder is moved to the tightening completion position to the larger diameter side of the fastening cylinder. I did.

(作用) 本体の締着筒の差込孔に被保持物を差し込んだ状態
で、回動筒を締付方向へ回動させると、回動筒が締着筒
の太径側へ移動され、これにより回動筒が締着筒を押し
縮め、その締着筒を被保持物に締付ける。上記の場合、
締付完了位置迄回動筒を回転させて太径側へ移動させる
と、一方の位置決め具である位置決め片が他方の位置決
め具である位置決め環の凸部に当接し、締付完了を知る
ことができる。
(Operation) When the object to be held is inserted into the insertion hole of the fastening tube of the main body, when the turning tube is turned in the fastening direction, the turning tube is moved to the larger diameter side of the fastening tube, As a result, the rotating cylinder presses the fastening cylinder, and the fastening cylinder is fastened to the held object. In the above case,
When the rotating cylinder is rotated to the tightening completion position and moved to the larger diameter side, the positioning piece that is one positioning tool contacts the convex part of the positioning ring that is the other positioning tool to know the completion of tightening. You can

次に作業終了後回動筒を戻すときには、回動筒を戻し
方向に回すと、ボールは、溝状の切欠部の長さに相当す
る間、軽く戻るので、そのまま引続き回動筒を回すと、
回動筒は戻り方向に軽く回すことができる。
Next, when the rotary cylinder is returned after the work is finished, if the rotary cylinder is rotated in the return direction, the balls will lightly return for the length of the groove-shaped notch. ,
The rotating cylinder can be lightly turned in the return direction.

(実施例) 以下本願の実施例を示す図面について説明する。第1
図乃至第3図において、1は本体、2はその元部に備わ
った連結部で、工作機のスピンドルに取付けるようにし
た部分である。3は本体1の一端に一体に連設具備され
た締着筒で、半径方向に弾性変形可能に構成してあり、
内部は被保持物を挿入する為の差込孔4となっている。
5は締着筒3の内周面の締着面を示す。7は締着筒3の
外周面を示し、連結部2の側が太くなるテーパ状に形成
してある。10,10・・・は上記内周面5に形成した溝
で、夫々断面形状を形成すると共に、締着筒3の軸線と
平行でかつ軸線方向に長く形成してある。またその深さ
は溝底10aと締着筒3の外周面7との間に大きい肉厚が
残存するよう浅く形成してある。11は締着筒3の元部外
周に環状に備えてある位置決め部である。上記位置決め
部11において、12は締着筒3と同心に形成してある嵌合
面、13は嵌合面12に形成してあるリング溝、14は同じく
嵌合面12に形成してあるボールの移動を阻止する為のボ
ール収容孔で、第4図に示すように2箇所に設けてあ
る。15は締着筒3の軸線に対して直交している位置決め
面である。尚上記溝10の断面形状は矩形に形成してもよ
く、またその長手方向は締着筒3の軸線に対して傾斜
(螺旋)させてもよい。次に17は回動筒で、その内周面
18は前記外周面7と平行なテーパ状に形成してある。外
周面にはOリング溝20が形成され、そのOリング溝20に
Oリング21を嵌合させてある。又外周面には周知のスパ
ナ掛溝19が形成してある。22は回動筒17の挿入側の端面
に備えてある位置決め部である。上記位置決め部22にお
いて、23は回動筒17の軸線に対して直交している位置決
め面で、回動筒17の端面によって形成してある。24は回
動筒17の外周面に形成してあるローラ収容穴で、第2図
に示すように2箇所に設けてある。上記ローラ収容穴24
は一部が位置決め面23に開放されている。次に26は締着
筒3と回動筒17の間に配設された案内筒で、周知の如く
複数の案内孔が形成されて鳥篭状となっており、各案内
孔にはローラ27が夫々回動自在に存置させてある。それ
らのローラ27は周知の如く案内筒26の中心軸線(締着筒
3の中心軸線に一致)に対し、一定の角度を持ったねじ
れの位置の関係に置かれている。28は防塵用のゴムシー
ル、29は抜止用のサークリップを夫々示す。
(Example) Hereinafter, drawings showing an example of the present application will be described. First
In FIGS. 3 to 3, reference numeral 1 is a main body, and 2 is a connecting portion provided at a base portion thereof, which is a portion to be attached to a spindle of a machine tool. Reference numeral 3 denotes a fastening cylinder integrally provided at one end of the main body 1 and configured to be elastically deformable in the radial direction,
The inside is an insertion hole 4 for inserting a held object.
Reference numeral 5 denotes a fastening surface on the inner peripheral surface of the fastening tube 3. Reference numeral 7 denotes an outer peripheral surface of the fastening cylinder 3, which is formed in a tapered shape in which the side of the connecting portion 2 becomes thick. Reference numerals 10, 10 ... Denote grooves formed on the inner peripheral surface 5, each of which has a cross-sectional shape and is parallel to the axis of the fastening cylinder 3 and long in the axial direction. The depth thereof is shallow so that a large thickness remains between the groove bottom 10a and the outer peripheral surface 7 of the fastening cylinder 3. Reference numeral 11 denotes a positioning portion which is annularly provided on the outer circumference of the base of the fastening cylinder 3. In the positioning portion 11, 12 is a fitting surface formed concentrically with the fastening cylinder 3, 13 is a ring groove formed in the fitting surface 12, and 14 is a ball also formed in the fitting surface 12. Ball receiving holes for preventing the movement of the ball are provided at two places as shown in FIG. 15 is a positioning surface orthogonal to the axis of the fastening cylinder 3. The cross section of the groove 10 may be formed in a rectangular shape, and its longitudinal direction may be inclined (spiral) with respect to the axis of the fastening cylinder 3. Next, 17 is a rotating cylinder, the inner peripheral surface of which
18 is formed in a taper shape parallel to the outer peripheral surface 7. An O-ring groove 20 is formed on the outer peripheral surface, and an O-ring 21 is fitted in the O-ring groove 20. Further, a well-known spanner hook groove 19 is formed on the outer peripheral surface. Reference numeral 22 is a positioning portion provided on the end surface of the rotating cylinder 17 on the insertion side. In the positioning section 22, reference numeral 23 is a positioning surface orthogonal to the axis of the rotary cylinder 17, and is formed by the end surface of the rotary cylinder 17. Reference numeral 24 is a roller accommodating hole formed on the outer peripheral surface of the rotating cylinder 17, and is provided at two positions as shown in FIG. Roller receiving hole 24
Is partially open to the positioning surface 23. Next, reference numeral 26 is a guide tube disposed between the fastening tube 3 and the rotating tube 17, which has a bird cage shape with a plurality of guide holes formed as is well known. Each is rotatably retained. As is well known, the rollers 27 are arranged in a twisted position having a certain angle with respect to the central axis of the guide cylinder 26 (corresponding to the central axis of the fastening cylinder 3). 28 is a dust-proof rubber seal, and 29 is a circlip for retaining.

次に、30は上記位置決め部11に装設してある位置決め
具で、第2図に示すように構成されている。上記位置決
め具30において、31は位置決め環で、中央孔31aが上記
嵌合面12に回動自在に嵌合されている。上記位置決め環
31において、32は回動筒17側の側面に形成してある多数
の凸部で、円周方向に等ピッチ間隔に形成してある。こ
の凸部32は第5図に示すように断面台形に形成され、そ
の締付回転方向側の立上がり面32aは上面32cに対して略
直角に、また緩め回転方向側の立上がり面32bは底面32d
から上面32cにかけてゆっくり立上がる斜面に夫々形成
してある。33は中央孔31aの内周面に長溝状に形成して
ある断面円弧状の切欠部で、上記ボール収容孔14と相対
向する位置に夫々形成してある。34はボールであって、
相対的に配置されているボール収容孔14と、切欠部33と
の間に位置させてあって位置決め環31が所定角度(図面
では略60度)以上相対回動しないように回り止めされて
いる。35はリング溝13に嵌合させてある抜止用のサーク
リップ、36は位置決め環31と位置決め面15間に圧縮介在
させてある皿バネで、この皿バネ36はウェーブワッシ
ャ、コイルスプリング又はゴム等に代えても良い。また
上記皿バネ36は、位置決め環31或いは凸部32を弾性部材
で構成する場合には、省いても良い。次に、37は上記位
置決め部22に装設してある位置決め具で、位置決め片と
して例示する一対のローラ38によって構成してある。上
記ローラ38は第1図に示すようにローラ収容24に回転自
在に嵌合され、その外周の一部が位置決め面23から突出
されている。上記ローラ38は後述のカバーで抜止されて
いる。なお、39はカバーで、本体1に固着され、その内
面は上記Oリング21に摺接されている。
Next, 30 is a positioning tool mounted on the positioning part 11 and is configured as shown in FIG. In the positioning tool 30, 31 is a positioning ring, and the central hole 31a is rotatably fitted to the fitting surface 12. Positioning ring
In FIG. 31, 32 is a large number of convex portions formed on the side surface on the rotating cylinder 17 side, which are formed at equal pitch intervals in the circumferential direction. As shown in FIG. 5, the convex portion 32 is formed in a trapezoidal cross section, and the rising surface 32a on the tightening rotational direction side is substantially perpendicular to the upper surface 32c, and the rising surface 32b on the loosening rotational direction side is the bottom surface 32d.
To the upper surface 32c, they are respectively formed on slopes that rise slowly. Reference numeral 33 is a notched portion having an arcuate cross section formed in a long groove shape on the inner peripheral surface of the central hole 31a, and is formed at a position facing the ball accommodating hole 14, respectively. 34 is a ball,
The positioning ring 31 is positioned between the ball accommodating hole 14 and the notch 33 which are arranged relatively to each other, and the positioning ring 31 is prevented from rotating relative to a predetermined angle (approximately 60 degrees in the drawing). . 35 is a retaining circlip fitted in the ring groove 13, 36 is a disc spring compressed between the positioning ring 31 and the positioning surface 15, and the disc spring 36 is a wave washer, a coil spring, rubber or the like. May be replaced with. The disc spring 36 may be omitted when the positioning ring 31 or the convex portion 32 is made of an elastic member. Next, 37 is a positioning tool mounted on the positioning section 22, and is composed of a pair of rollers 38 exemplified as positioning pieces. As shown in FIG. 1, the roller 38 is rotatably fitted in the roller housing 24, and a part of the outer periphery of the roller 38 projects from the positioning surface 23. The roller 38 is prevented from coming off by a cover described later. A cover 39 is fixed to the main body 1 and has an inner surface slidably contacting the O-ring 21.

次に上記構成の保持具を用いて被保持物例えば刃具
(被工作物でもよい)を保持する操作について説明す
る。先ず刃具の元部を差込孔4の内部に差し込む。次に
回動筒17を第3図において矢印方向に回動させる。する
と上記多数のローラ27は案内筒26に案内されて上記の如
きねじれの位置の関係となった状態で回転する為、上記
回動筒17を回動させることにより、多数のローラ27は夫
々締着筒3の外周面7と回動筒17の内周面18との間で転
がりながら、外周面7に沿って螺旋状に締着筒3におけ
る太径部の側に向けて進行する。これにより回動筒17も
同方向に進行する。このように回動筒17が太径部の側に
向けて進行すると、締着筒3は回動筒17によりローラ27
を介して押し縮められることとなり、締着筒3は減径す
る。その結果締着面5は刃具の外周面に密着し、これを
強く締付ける。
Next, an operation for holding an object to be held, for example, a cutting tool (which may be a workpiece) using the holding tool having the above configuration will be described. First, the base of the cutting tool is inserted into the insertion hole 4. Next, the rotary cylinder 17 is rotated in the arrow direction in FIG. Then, the large number of rollers 27 are guided by the guide cylinder 26 and rotate in the state of the twisted position as described above. Therefore, by rotating the rotary cylinder 17, the large number of rollers 27 are respectively tightened. While rolling between the outer peripheral surface 7 of the mounting cylinder 3 and the inner peripheral surface 18 of the rotating cylinder 17, the spiral cylinder progresses toward the large-diameter portion side of the fastening cylinder 3 along the outer peripheral surface 7. As a result, the rotating cylinder 17 also advances in the same direction. In this way, when the rotating cylinder 17 advances toward the large diameter portion side, the fastening cylinder 3 causes the rotating cylinder 17 to move the roller 27.
The fastening cylinder 3 is reduced in diameter by being compressed. As a result, the fastening surface 5 comes into close contact with the outer peripheral surface of the cutting tool and strongly tightens it.

上記のように回動筒17を回すことによって締着筒3を
収縮させて被保持物を締付ける場合、回動筒17が締付完
了位置より相手手前にあるときは、第5図(A)に示す
ように回動筒17側のローラ38は本体1側の凸部32から離
れた位置を回動される。その後、回動筒17が締付完了位
置近く迄太径側へ移動されると、第5図(B)に示すよ
うに上記ローラ38が位置決め環31における1つの凸部32
の立上面32bに当接し、その後の回動筒17の回動により
そのローラ38が位置決め環31を切欠部33の長さ分だけ所
定角度一体的に回動させる。上記位置決め環31の回動が
第5図(C)に示すようにボール34によって停止される
と、その後の回動筒17の回動によってローラ38が第5図
(D)に示すように皿バネ36を圧縮させて凸部32の上面
32cに乗り上がる。このとき、回動筒17を回動させる手
には皿バネ36を圧縮させる為の反力が作用し、その力の
変化によってローラ38が上面32cに乗り上げたことを知
ることができる。その後、更に回動筒17を僅かに回動さ
せると、第5図(E)に示すようにローラ38が凸部32か
ら外れて凸部相互間に形成される凹部45に入り込むと共
に、位置決め環31が皿バネ36によって押し戻されて凸部
32の上面32cが回動筒17の位置決め面23に当接し、その
とき「カチン」と音を発生すると共に回動筒17を回動さ
せる手にその振動が伝わる。また回動筒17は丁度締付完
了位置に移動されており、締着筒3は被保持物を適度な
力で締付ける。
As described above, when the fastening cylinder 3 is contracted by turning the turning barrel 17 to fasten the object to be held, when the turning barrel 17 is in front of the fastening completion position, the other end is shown in FIG. As shown in, the roller 38 on the side of the rotating cylinder 17 is rotated at a position away from the convex portion 32 on the side of the main body 1. After that, when the rotary cylinder 17 is moved to the large diameter side near the tightening completion position, the roller 38 causes the one convex portion 32 of the positioning ring 31 to move as shown in FIG.
The roller 38 abuts on the upright surface 32b of the above, and the roller 38 rotates the positioning ring 31 integrally by a predetermined angle by the length of the notch 33 by the rotation of the rotating cylinder 17. When the rotation of the positioning ring 31 is stopped by the ball 34 as shown in FIG. 5 (C), the roller 38 is rotated by the rotation of the rotating cylinder 17 thereafter, as shown in FIG. 5 (D). The upper surface of the convex portion 32 by compressing the spring 36
Get on the 32c. At this time, a reaction force for compressing the disc spring 36 acts on the hand that rotates the rotating cylinder 17, and it can be known that the roller 38 has climbed onto the upper surface 32c due to the change in the force. Thereafter, when the rotating cylinder 17 is further rotated slightly, the roller 38 is disengaged from the convex portion 32 and enters the concave portion 45 formed between the convex portions as shown in FIG. 31 is pushed back by the disc spring 36 and the convex portion
The upper surface 32c of 32 comes into contact with the positioning surface 23 of the rotary cylinder 17, at which time a clicking sound is generated and the vibration is transmitted to the hand that rotates the rotary cylinder 17. Further, the rotary cylinder 17 has just been moved to the tightening completion position, and the tightening cylinder 3 tightens the held object with an appropriate force.

次に、長期使用に伴なう締着筒3、回動筒17、ローラ
ー27等の摩耗等によって、回動筒17を第5図(E)に示
す位置迄回動させても被保持物の締付がゆるい場合に
は、次のようにして増締めすることができる。先ず、第
5図(E)の状態から更に回動筒17を締付方向へ回動さ
せると、ローラ38が第5図(F)に示すように次の凸部
32の立上面32bに当接し、その後ローラ38が第5図
(G)に示すように皿バネ36を圧縮させて凸部32の上面
32cに乗り上げた後、第5図(H)に示すようにローラ3
8が凸部32から凹部に入ると共に再び位置決め環31が皿
バネ36によって戻され、凸部32が位置決め面23に「カチ
ン」と当接する。その結果、回動筒17は僅かに太径側へ
移動し、締着筒3は被保持物40を増締めする。
Next, even if the rotating cylinder 17 is rotated to the position shown in FIG. 5 (E) due to wear of the tightening cylinder 3, the rotating cylinder 17, the roller 27, etc. due to long-term use, the object to be held If the tightening is loose, it can be tightened as follows. First, when the rotary cylinder 17 is further rotated in the tightening direction from the state shown in FIG. 5 (E), the roller 38 moves to the next convex portion as shown in FIG. 5 (F).
The roller 38 comes into contact with the upright surface 32b of 32, and then the roller 38 compresses the disc spring 36 as shown in FIG.
After riding on the 32c, the roller 3 as shown in FIG.
The positioning ring 31 is returned again by the disc spring 36 as the 8 enters the concave portion from the convex portion 32, and the convex portion 32 comes into contact with the positioning surface 23 with the "click". As a result, the rotating cylinder 17 moves slightly to the larger diameter side, and the fastening cylinder 3 tightens the held object 40 more.

次に、被保持物の締付をゆるめる場合には、回動筒17
を第5図(H)の状態から戻し方向へ逆回転させると、
先ず、ローラ38が第5図(I)に示すように凸部32の立
上げ面32aに当接して位置決め環31を所定角度一体的に
回動させる。その位置決め環31の回動がボール34で停止
されると、ローラ38が第5図(J)に示すように皿バネ
36を圧縮させて凸部32の上面に乗り上げる。この場合、
回動筒17は上記のように位置決め環31を所定角度回動さ
せることで小径部側へ或程度移動されているので、ロー
ラ38による凸部32の押し下げを小さい力で行なうことが
できる。その後、回動筒17を更に戻し方向へ回動させる
と、ローラ38が凸部32から離れて回動され、ローラ38は
第5図(L)に示すように凸部32から遠ざけられる。そ
の結果、締着筒3は被保持物をゆるめる。
Next, when loosening the object to be held, the rotating cylinder 17
Is reversely rotated in the returning direction from the state of FIG. 5 (H),
First, as shown in FIG. 5 (I), the roller 38 contacts the rising surface 32a of the convex portion 32 to rotate the positioning ring 31 integrally by a predetermined angle. When the rotation of the positioning ring 31 is stopped by the ball 34, the roller 38 moves as shown in FIG.
36 is compressed and rides on the upper surface of the convex portion 32. in this case,
Since the rotating cylinder 17 is moved to the small diameter side to some extent by rotating the positioning ring 31 by a predetermined angle as described above, the convex portion 32 can be pushed down by the roller 38 with a small force. Then, when the rotating cylinder 17 is further rotated in the returning direction, the roller 38 is rotated away from the convex portion 32, and the roller 38 is moved away from the convex portion 32 as shown in FIG. 5 (L). As a result, the fastening cylinder 3 loosens the held object.

第6図は本願の異なる例を示すもので、位置決め面23
eに一体に突設した突部50によって位置決め具37eの位置
決め片を構成している。なお、機能上前図のものと同一
又は均等構成と考えられる部分には、前図と同一の符号
にアルファベットのeを付して重複する説明を省略し
た。なお、本願にあっては、本体に位置決め片を備えさ
せ、回動筒に位置決め環を備えさせても良い。また、位
置決め環に弾力性を備えさせる代わりに位置決め片に弾
力性を備えさせても良い。
FIG. 6 shows a different example of the present application, in which the positioning surface 23
The protrusion 50 integrally formed with e forms a positioning piece of the positioning tool 37e. In addition, parts that are considered to be the same or equivalent in configuration to those in the previous figure in terms of function are denoted by the same reference numerals as those in the previous figure with the letter e added to omit redundant description. In the present application, the main body may be provided with the positioning piece, and the rotary cylinder may be provided with the positioning ring. Further, instead of providing the positioning ring with elasticity, the positioning piece may be provided with elasticity.

(発明の効果) 以上のように本発明にあっては、被保持物を保持させ
る場合、被保持物を締着筒3の差込孔4に差込み、回動
筒17を回してそれを締着筒3の太径部の側へ移動させる
ことにより、締着筒3を押し縮め、締着筒3の内周面に
よって被保持物を締着保持できる。
(Effects of the Invention) As described above, according to the present invention, when holding an object to be held, the object to be held is inserted into the insertion hole 4 of the fastening tube 3, and the rotating tube 17 is rotated to tighten it. By moving the fastening cylinder 3 to the side of the larger diameter portion, the fastening cylinder 3 is pressed and contracted, and the held object can be fastened and held by the inner peripheral surface of the fastening cylinder 3.

また上記のように回動筒17を回して締着筒3を押し縮
める場合、回動筒17を所定の締付完了位置迄締着筒3の
太径部側へ移動させると、一方の位置決め具である位置
決め片38が他方の位置決め具である位置決め環31の複数
の凸部32、32の相互間に落ち込ませることができ、これ
によって回動筒17の回転による締付完了位置を知ること
ができ、回動筒17の回転によって被保持物を適切な力で
締付けることができる。その結果回動筒17の締付き過ぎ
による締着筒3や回動筒17等の摩耗を防止できて保持具
の寿命を長くできる。
Further, in the case of rotating the rotating cylinder 17 to press the contracting cylinder 3 as described above, if the rotating cylinder 17 is moved to the large diameter portion side of the tightening cylinder 3 to a predetermined tightening completion position, one of the positioning is determined. The positioning piece 38, which is a tool, can be made to fall between the plurality of convex portions 32, 32 of the positioning ring 31, which is the other positioning tool, so that the tightening completion position due to the rotation of the rotating cylinder 17 can be known. The object to be held can be tightened with an appropriate force by the rotation of the rotating cylinder 17. As a result, it is possible to prevent the tightening cylinder 3, the rotating cylinder 17 and the like from being worn due to over-tightening of the rotating cylinder 17, and to extend the life of the holder.

また上記のように位置決め片38が位置決め環31の凸部
32に当接する相互間に入り込むことによって締付完了を
知り得るようにしたものであっても、長期使用による摩
耗等によって位置決め片38が位置決め環31の凸部32に当
接する時点で被保持物の締付がゆるくなった場合には、
位置決め片38に位置決め環31の凸部32を乗り越えさせて
回動筒17を回転させ得るようにしてあるので、位置決め
片38に凸部32を乗り越えさせた状態では位置決め片38を
凸部32に係止させることによって回動筒17の戻り回転を
阻止でき、回動筒17に外力が作用したときでも締付のゆ
るみを防止して初期の締付状態を維持できる効果があ
る。
Further, as described above, the positioning piece 38 is the convex portion of the positioning ring 31.
Even if it is possible to know the completion of tightening by entering between the abutting parts 32, the held object is held at the time when the positioning piece 38 comes into contact with the convex part 32 of the positioning ring 31 due to wear or the like due to long-term use. If the tightening of is loose,
The positioning piece 38 can be rotated over the convex portion 32 of the positioning ring 31 so that the rotary cylinder 17 can be rotated. By locking, the return rotation of the rotary cylinder 17 can be prevented, and even if an external force is applied to the rotary cylinder 17, the tightening can be prevented from being loosened and the initial tightened state can be maintained.

さらに本願発明にあっては、位置決め具30における位
置決め環31の回り止めの構成は、位置決め環31と、回り
止めの相手方の位置決め部11との間にボール34を介在さ
せると共に、上記位置決め環31と、上記相手方の位置決
め部11には、上記ボール34が周方向に移動するのを阻止
する為のボール収容孔14と、周方向に長く形成した溝状
の切欠部33とを設けて一定区間での相対回動を可能に構
成してあるので、上記位置決め環31の凹凸歯に噛合って
いる回動筒17を戻し回動させるときでも、回動筒17は、
上記溝状の切欠部33のある区間において、始動時は、ボ
ール34の存在によって軽々と戻し方向に始動させること
ができ、その後は、その戻し回動の勢いと、僅かながら
位置決め環31が弾力的に軸心方向に後退することからし
て、引続いて回動筒17を壊すことなく戻し方向に回して
作業を終了させることのできる効果がある。
Further, in the invention of the present application, the configuration of the rotation stop of the positioning ring 31 in the positioning tool 30 is such that the ball 34 is interposed between the positioning ring 31 and the other positioning portion 11 of the rotation stop, and In the positioning portion 11 of the other side, a ball accommodating hole 14 for preventing the balls 34 from moving in the circumferential direction, and a groove-shaped notch 33 formed long in the circumferential direction are provided for a given section. Since the relative rotation of the rotary cylinder 17 is possible, even when the rotary cylinder 17 engaged with the concave and convex teeth of the positioning ring 31 is rotated back,
In the section where the groove-shaped notch 33 is present, at the time of start-up, the presence of the ball 34 allows the start-up to be started in a light return direction. Since it retreats in the axial direction, the work can be finished by continuously turning the rotating cylinder 17 in the returning direction without breaking it.

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

図面は本願の実施例を示すもので、第1図は半断面図、
第2図は分解斜視図、第3図は一部を省略して示す側面
図、第4図はIV−IV線断面図、第5図(A)〜(L)は
位置決め具を展開して示す作動説明図、第6図は異なる
例を示す斜視図。 1……本体、3……締着筒、4……差込孔、17……回動
筒、27……ローラ、31……位置決め環、32……凸部、38
……ローラ(位置決め片)。
The drawings show an embodiment of the present application, and FIG. 1 is a half sectional view,
2 is an exploded perspective view, FIG. 3 is a side view with a part omitted, FIG. 4 is a sectional view taken along line IV-IV, and FIGS. 6 is a perspective view showing a different example. FIG. 1 ... Main body, 3 ... Tightening tube, 4 ... Insertion hole, 17 ... Rotating tube, 27 ... Roller, 31 ... Positioning ring, 32 ... Convex part, 38
...... Roller (positioning piece).

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】保持具の本体における軸心方向の一端には
半径方向に弾性変形可能な中空の筒状で、しかも一端が
開口した被保持物の差込孔となっており、かつ外周面は
本体寄が太径となるテーパー面となっている締着筒を、
本体と同軸上でかつ本体に対して一体的に備えさせ、上
記締着筒の周囲には回動筒を相対回動可能に配設すると
共に、本体と上記回動筒にあっては、上記回動筒が本体
側に寄り過ぎるのを防止する為の位置決め部を回動筒の
軸線方向で相対向する位置に備えさせ、上記回動筒を締
着筒の太径側へ移動させることによって締着筒を収縮さ
せ、回動筒の位置決め部を本体の位置決め部に当接させ
ることによって回動筒による締付を完了するようにして
ある保持具において、上記回動筒の位置決め部と本体の
位置決め部との間には、一方は上記軸心方向に弾力性を
備えている環状体でかつ表面には円周方向に複数の凸部
を備えている位置決め環と、他方は上記位置決め環の表
面における凸部と対向する位置に配置されるようにして
ある位置決め片とより成る一対の位置決め具を介在さ
せ、上記位置決め具の一方は本体に、他方は回動筒に夫
々回り止めさせ、しかも、位置決め具における位置決め
環の回り止めの構成は、位置決め環と、回り止めの相手
方の位置決め部との間にボールを介在させると共に、上
記位置決め環と、上記相手方の位置決め部には、上記ボ
ールが周方向に移動するのを阻止する為のボール収容孔
と、周方向に長く形成した溝状の切欠部とを設けて一定
区間での相対回動を可能に構成し、さらに、上記の位置
決め環と位置決め片との関係位置は回動筒を締付完了位
置迄締着筒の太径側へ移動させた時点で位置決め環の凸
部相互間に位置決め片が位置するように設定してあるこ
とを特徴とする保持具。
1. A holder has a hollow cylindrical shape that is elastically deformable in the radial direction at one end in the axial direction of the main body, and has an insertion hole for an object to be held whose one end is open, and has an outer peripheral surface. Is a tightening cylinder with a tapered surface where the main body side is a large diameter,
It is provided coaxially with the main body and integrally with the main body, and a rotary cylinder is disposed so as to be relatively rotatable around the fastening cylinder, and the main body and the rotary cylinder have Positioning portions for preventing the rotating cylinder from being excessively close to the main body are provided at positions facing each other in the axial direction of the rotating cylinder, and the rotating cylinder is moved to the larger diameter side of the tightening cylinder. A holder in which the tightening cylinder is contracted and the positioning portion of the rotary cylinder is brought into contact with the positioning portion of the main body to complete the tightening by the rotary cylinder. Between the positioning portion and the positioning portion, one is a positioning ring having an elasticity in the axial direction and a plurality of convex portions on the surface in the circumferential direction, and the other is the positioning ring. A positioning piece arranged to face the convex portion on the surface of A pair of positioning tools, one of the positioning tools is fixed to the main body and the other is fixed to the rotation cylinder. Further, the positioning ring of the positioning tool is configured to prevent the positioning ring and the locking ring from rotating. In addition to interposing a ball between the ball and its counterpart positioning portion, the positioning ring, the ball receiving hole for preventing the ball from moving in the circumferential direction in the positioning portion of the opponent, and the ball receiving hole in the circumferential direction. A long groove-shaped notch is provided to enable relative rotation in a certain section. Further, the position of the positioning ring and the positioning piece is fixed by tightening the rotating cylinder to the tightening completion position. A holder characterized in that the positioning piece is set so as to be positioned between the convex portions of the positioning ring when the positioning piece is moved to the larger diameter side of the cylinder.
JP61312785A 1986-12-29 1986-12-29 Holder Expired - Fee Related JP2562883B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61312785A JP2562883B2 (en) 1986-12-29 1986-12-29 Holder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61312785A JP2562883B2 (en) 1986-12-29 1986-12-29 Holder

Publications (2)

Publication Number Publication Date
JPS63169205A JPS63169205A (en) 1988-07-13
JP2562883B2 true JP2562883B2 (en) 1996-12-11

Family

ID=18033373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61312785A Expired - Fee Related JP2562883B2 (en) 1986-12-29 1986-12-29 Holder

Country Status (1)

Country Link
JP (1) JP2562883B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3997189B2 (en) * 2003-10-01 2007-10-24 株式会社日研工作所 Chuck
JP2006305704A (en) * 2005-05-02 2006-11-09 Mitsubishi Electric Corp Chip removing method
IL176592A (en) * 2006-06-27 2010-05-17 Hanoch Guy Chuck having a rotatable securing mechanism
JP2007260903A (en) * 2007-07-10 2007-10-11 Alps Tool Co Ltd Chuck
US20150273593A1 (en) * 2014-03-27 2015-10-01 Meiko Machine Co., Ltd. Chuck With Separate Retainer Parts
US10668541B2 (en) 2017-07-31 2020-06-02 Iscar, Ltd. Tool holding system having captive and non-releasable members, method of manufacture and assembly of same and cutting tool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034788A (en) * 1975-12-19 1977-07-12 Elco Industries, Inc. Fastener assembly
JPS5540363A (en) * 1978-09-18 1980-03-21 Mitsubishi Heavy Ind Ltd Oil hydraulic control device
JPS5779218U (en) * 1980-10-30 1982-05-15

Also Published As

Publication number Publication date
JPS63169205A (en) 1988-07-13

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