JP5077746B2 - Chuck - Google Patents

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JP5077746B2
JP5077746B2 JP2007206613A JP2007206613A JP5077746B2 JP 5077746 B2 JP5077746 B2 JP 5077746B2 JP 2007206613 A JP2007206613 A JP 2007206613A JP 2007206613 A JP2007206613 A JP 2007206613A JP 5077746 B2 JP5077746 B2 JP 5077746B2
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claw
chuck
closing member
opening
radial direction
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JP2009039812A (en
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健郎 小林
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Howa Machinery Ltd
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Howa Machinery Ltd
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Description

本発明は、爪開閉部材に把握爪を簡単に装着させることが可能なチャックに関する。   The present invention relates to a chuck capable of easily attaching a grasping claw to a claw opening / closing member.

従来、チャックは、チャック本体にチャック半径方向に移動可能な複数の爪開閉部材を設け、各爪開閉部材の先端には把握爪が装着され、チャック軸線方向に移動可能な駆動部材により爪開閉部材をチャック半径方向に移動させて各把握爪をワークに対してクランプ、アンクランプ動作させるようになっている。
特許文献１に記載のチャックでは、爪開閉部材の前面に２つのダブテイルが形成され、把握爪に前記ダブテイルに係合する２つのあり溝が形成され、ダブテイルの傾斜面にあり溝の傾斜面を当接させ、把握爪の位置決め孔に爪開閉部材に設けたロックバーを嵌め込むことで爪開閉部材に把握爪が装着されるようになっている。
特許文献２に記載のチャックでは、爪開閉部材には支承面が形成された支承部と凹所が形成された基部とが備えられ、把握爪に前記支承面に当接可能な傾斜面と前記凹所に収容される踵部が設けられ、支承面に傾斜面を当接させると共に凹所に踵部を収容させ、把握爪の開口部に爪開閉部材に設けたプッシャーを嵌め込むことで爪開閉部材に把握爪が装着されるようになっている。
実公平３−４４４１０号公報 特許第２５１５７４６号公報 Conventionally, a chuck is provided with a plurality of claw opening / closing members movable in the chuck radial direction on the chuck body, and a gripping claw is mounted on the tip of each claw opening / closing member, and the claw opening / closing member is driven by a driving member movable in the chuck axis direction. Is moved in the chuck radial direction to clamp and unclamp each gripping claw with respect to the workpiece.
In the chuck described in Patent Document 1, two dovetails are formed on the front surface of the claw opening / closing member, and two dovetail grooves are formed on the gripping claws to be engaged with the dovetail, and the dovetail inclined surface is formed on the inclined surface of the dovetail. The grasping claw is attached to the claw opening / closing member by abutting and fitting a lock bar provided on the claw opening / closing member into the positioning hole of the grasping claw.
In the chuck described in Patent Document 2, the claw opening / closing member is provided with a support portion having a support surface formed thereon and a base portion having a recess formed therein, and an inclined surface capable of contacting the support surface with the grasping claw, A hook is provided in the recess, the inclined surface is brought into contact with the bearing surface, the hook is received in the recess, and a pusher provided in the nail opening / closing member is fitted into the opening of the grasping nail. A grasping claw is attached to the opening / closing member.
Japanese Utility Model Publication No. 3-44410 Japanese Patent No. 2515746

上記のチャックでは、爪開閉部材の傾斜面に把握爪の傾斜面を当接させ、その把握爪の位置決め孔（特許文献１）や開口部（特許文献２）に爪開閉部材に設けたロックバー（特許文献１）やプッシャー（特許文献２）などの嵌め込み部材を嵌め込むことで把握爪が爪開閉部材に装着されている。ところが、ワークの変更等により把握爪を交換する場合、工具を用いて前記嵌め込み部材を爪開閉部材の後端方向に移動させなければ爪開閉部材から把握爪を外すことができない。また、交換した把握爪を爪開閉部材に装着するためには、工具を用いて嵌め込み部材を把握爪に嵌め込まなければならない。よって、把握爪の交換に要する時間が長くなるおそれがあった。更に、一方の手で工具を使用し、もう一方の手で把握爪を把持しなければならず、把握爪の交換毎に工具と把握爪を持ち替えなければならない煩わしさがあった。
そこで本発明の課題は、上記問題点に鑑み、工具を用いることなく把握爪の交換が速やかに行えるチャックを提供することを目的とする。 In the above chuck, the inclined surface of the grasping claw is brought into contact with the inclined surface of the claw opening / closing member, and the lock bar provided in the claw opening / closing member in the positioning hole (Patent Document 1) or the opening (Patent Document 2) of the grasping claw. The grasping claw is attached to the claw opening / closing member by fitting a fitting member such as (Patent Document 1) or a pusher (Patent Document 2). However, when the grasping claw is replaced by changing the workpiece or the like, the grasping claw cannot be removed from the claw opening / closing member unless the fitting member is moved toward the rear end of the claw opening / closing member using a tool. Further, in order to attach the replaced grasping claw to the claw opening / closing member, the fitting member must be fitted into the grasping claw using a tool. Therefore, there is a possibility that the time required for replacing the grasping claws may be increased. Further, the tool must be used with one hand and the grasping claw must be grasped with the other hand, and the tool and the grasping claw must be changed every time the grasping nail is replaced.
In view of the above problems, an object of the present invention is to provide a chuck that can quickly replace a grasping claw without using a tool.

本発明は、チャック本体にチャック半径方向に移動可能な複数の爪開閉部材を設け、各爪開閉部材の先端には把握爪が装着され、チャック軸線方向に移動可能な駆動部材により爪開閉部材をチャック半径方向に移動させて各把握爪をワークに対してクランプ、アンクランプ動作させるようにしたチャックにおいて、前記爪開閉部材の先端のチャック半径方向内側に係合凸部を設け、爪開閉部材の前側に把握爪をチャック半径方向へ案内可能な嵌合溝と嵌合溝に案内された把握爪の上面にチャック前方より被さって係合可能な係合部を設け、把握爪のチャック半径方向内側に前記係合凸部に係合可能な係合凹部を設け、把握爪をチャック半径方向内側から嵌合溝に案内させて係合部に係合させると共に、係合凹部を係合凸部に係合させて把握爪を爪開閉部材に装着して成り、爪開閉部材の先端にチャックの前方に突出するボールを備えたボールプランジャを設け、そのボールが係合可能な位置決め孔を把握爪の下面の前記係合部よりチャック半径方向内側に設け、位置決め孔にボールを係合した前記把握爪の上面が爪開閉部材の前記係合部に係合するように、前記係合部を前記ボールプランジャの取付位置よりもチャック半径方向外方かつ前記嵌合溝の幅方向両側に設けたことを特徴とする。 In the present invention, the chuck body is provided with a plurality of claw opening / closing members movable in the chuck radial direction, a gripping claw is attached to the tip of each claw opening / closing member, and the claw opening / closing member is moved by a driving member movable in the chuck axis direction. In the chuck in which each gripping claw is clamped and unclamped with respect to the workpiece by moving in the chuck radial direction, an engagement convex portion is provided on the inner side in the chuck radial direction at the tip of the claw opening / closing member, A fitting groove that can guide the gripping claw in the chuck radial direction on the front side and an engaging part that covers and engages the gripping claw guided from the front of the chuck on the upper surface of the gripping claw are provided. An engaging recess that can be engaged with the engaging protrusion is provided in the chuck, and the gripping claw is guided from the inner side in the chuck radial direction to the engaging groove to be engaged with the engaging portion. Engage and grasp claw Made by mounting the claw opening and closing member, a ball plunger having a ball which projects forwardly of the chuck at the tip of the claw opening and closing member is provided, the ball is from the engagement portion of the lower surface of the grasping pawl engageable with the positioning holes Provided on the inner side in the chuck radial direction, the engaging portion is chucked from the mounting position of the ball plunger so that the upper surface of the grasping claw that engages the ball in the positioning hole engages with the engaging portion of the claw opening / closing member. It is characterized by being provided radially outward and on both sides in the width direction of the fitting groove .

本発明では、前記爪開閉部材の先端のチャック半径方向内側に係合凸部を設け、爪開閉部材の前側に把握爪をチャック半径方向へ案内可能な嵌合溝と嵌合溝に案内された把握爪の上面にチャック前方より被さって係合可能な係合部を設け、把握爪のチャック半径方向内側に前記係合凸部に係合可能な係合凹部を設け、把握爪をチャック半径方向内側から嵌合溝に案内させて係合部に係合させると共に、係合凹部を係合凸部に係合させて把握爪を爪開閉部材に装着して成り、爪開閉部材の先端にチャックの前方に突出するボールを備えたボールプランジャを設け、そのボールが係合可能な位置決め孔を把握爪の下面の前記係合部よりチャック半径方向内側に設け、位置決め孔にボールを係合した前記把握爪の上面が爪開閉部材の前記係合部に係合するように、前記係合部を前記ボールプランジャの取付位置よりもチャック半径方向外方かつ前記嵌合溝の幅方向両側に設けたことで、把握爪に嵌め込み部材を嵌め込まなくても把握爪を爪開閉部材に装着可能であり、嵌め込み部材を移動させる工具を用いることがないから速やかに把握爪の交換ができる。また、把握爪の交換時に把握爪が爪開閉部材から自重で落下しないために、一方の手で爪開閉部材から把握爪を取り外し、もう一方の手で交換する把握爪を爪開閉部材に装着することができる。
In the present invention, an engagement convex portion is provided on the inner side in the chuck radial direction at the tip of the claw opening / closing member, and the gripping claw is guided on the front side of the claw opening / closing member in the fitting groove and the fitting groove capable of guiding in the chuck radial direction. An engaging portion is provided on the upper surface of the gripping claw so as to be covered from the front of the chuck, and an engagement concave portion that can be engaged with the engaging convex portion is provided on the inner side of the gripping claw in the chuck radial direction. It is guided from the inside to the fitting groove and engaged with the engaging portion, and the engaging concave portion is engaged with the engaging convex portion and the grasping claw is attached to the claw opening / closing member, and is chucked at the tip of the claw opening / closing member. the ball plunger having a ball projecting forward is provided in the the ball provided in the chuck radially inwardly from the engagement portion of the lower surface of the grasping pawl engageable positioning hole, engaged the ball positioning hole The upper surface of the gripping claw is engaged with the engaging portion of the claw opening / closing member. To way, the engagement portion that was provided on both sides in the width direction of the chuck radially outward and the engagement groove than the mounting position of the ball plunger, without fitted a member fitted to grasp claws grasping claw Since it can be attached to the claw opening / closing member and a tool for moving the fitting member is not used, the grasping claw can be quickly replaced. Further, bunch to grasp claw during replacement does not fall by its own weight from the nail opening and closing member Nigitsume, remove the grasping pawl from the claw opening and closing member with one hand, mounted grasping claws to exchange with the other hand to the nail opening and closing member can do.

図１に示すチャック１のチャック本体２は、取付ボルト（図示しない）によってフロントボディ３の後端面をバックプレート４で塞いだものである。チャック本体２のチャック軸線ＣＬ上には駆動部材５が配置されている。駆動部材５は内側に段付き孔６ａを設けた軸部材６にカム面７ａを備えたカム部材７が一体に取り付けられたものである。フロントボディ３のチャック軸線ＣＬ上には支持孔８が穿設されている。また、この支持孔８をフロントボディ３前面から塞ぐように案内部材９が取り付けられている。前記駆動部材５は、軸部材６を支持孔８に摺動自在に嵌め込むと共に、軸部材６の大径孔に案内部材９が挿入されることで、支持孔８と案内部材９に案内された状態でチャック軸線ＣＬ方向に前後移動するようになっている。フロントボディ３には円周方向に等間隔に複数（３個）の装着孔１０が穿設されている。各装着孔１０には爪開閉部材１１が挿入され、各爪開閉部材１１は装着孔１０を横切るようにフロントボディ３に設置された支持軸１２に軸支されている。   The chuck main body 2 of the chuck 1 shown in FIG. 1 is obtained by closing the rear end surface of the front body 3 with a back plate 4 with mounting bolts (not shown). A drive member 5 is disposed on the chuck axis CL of the chuck body 2. The drive member 5 is formed by integrally attaching a cam member 7 having a cam surface 7a to a shaft member 6 provided with a stepped hole 6a inside. A support hole 8 is formed on the chuck axis CL of the front body 3. A guide member 9 is attached so as to close the support hole 8 from the front surface of the front body 3. The drive member 5 is slidably fitted into the support hole 8 and the guide member 9 is inserted into the large-diameter hole of the shaft member 6, so that the drive member 5 is guided to the support hole 8 and the guide member 9. In this state, it moves back and forth in the direction of the chuck axis CL. The front body 3 is provided with a plurality (three) of mounting holes 10 at equal intervals in the circumferential direction. A claw opening / closing member 11 is inserted into each mounting hole 10, and each claw opening / closing member 11 is pivotally supported by a support shaft 12 installed in the front body 3 so as to cross the mounting hole 10.

各爪開閉部材１１の後端は前記駆動部材５のカム面７ａに係合するようになっている。また、各爪開閉部材１１の後端には、バネ部材１３によってチャック半径方向の外方に向かって付勢される作動部材１４が備えられ、各爪開閉部材１１の後端は作動部材１４によりカム面７ａに押付けられている。よって、駆動部材５のカム面７ａの前後移動と作動部材１４により爪開閉部材１１の後端を揺動させることで、爪開閉部材１１の先端がチャック半径方向に往復移動するようになっている。フロントボディ３前面には、各装着孔１０を塞ぐようにシール部材１５を備えた蓋部材１６が取付られている。爪開閉部材１１の先端は、シール部材１５及び蓋部材１６を貫通してチャック本体２の前方へ突出している。各爪開閉部材１１の先端には把握爪１７が装着されている。   The rear end of each claw opening / closing member 11 is adapted to engage with the cam surface 7 a of the drive member 5. In addition, an operating member 14 that is biased outward in the chuck radial direction by a spring member 13 is provided at the rear end of each claw opening / closing member 11, and the rear end of each claw opening / closing member 11 is operated by the operating member 14. It is pressed against the cam surface 7a. Therefore, the front and rear movements of the cam surface 7a of the drive member 5 and the rear end of the claw opening / closing member 11 are swung by the actuating member 14 so that the tip of the claw opening / closing member 11 reciprocates in the chuck radial direction. . A lid member 16 including a seal member 15 is attached to the front surface of the front body 3 so as to close each mounting hole 10. The front end of the claw opening / closing member 11 penetrates the seal member 15 and the lid member 16 and protrudes forward of the chuck body 2. A grasping claw 17 is attached to the tip of each claw opening / closing member 11.

爪開閉部材１１の先端にはチャック半径方向内側に係合凸部１８が設けられ、爪開閉部材１１の前側に把握爪１７をチャック半径方向へ案内可能な嵌合溝１９と嵌合溝１９に案内された把握爪１７の上面２０に係合可能な係合部２１が設けられている。把握爪１７のチャック半径方向内側には前記係合凸部１８に係合可能な係合凹部２２が設けられている。把握爪１７の上面２０を係合部２１にスムーズに係合させるように把握爪１７の上面２０に傾斜面２０ａが設けられている。このことから、把握爪１７をチャック半径方向内側から嵌合溝１９に案内させて係合部２１に係合させると共に、係合凹部２２を係合凸部１８に係合させて把握爪１７が爪開閉部材１１に装着されるようになっている。また、爪開閉部材１１の先端にチャック１の前方に突出する突出部材（例えばボール）２３を備えた位置決め手段として例示するボールプランジャ２４が設けられ、ボールプランジャ２４のボール２３が係合可能な位置決め孔２５が把握爪１７の下面に設けられ、位置決め孔２５に前記ボール２３を係合した把握爪１７の上面２０が爪開閉部材１１の係合部２１に係合されるようになっている。   An engaging projection 18 is provided at the tip of the claw opening / closing member 11 on the inner side in the chuck radial direction, and a gripping claw 17 can be guided in the chuck radial direction on the front side of the claw opening / closing member 11. An engaging portion 21 that can be engaged with the upper surface 20 of the guided grasping claw 17 is provided. An engagement recess 22 that can be engaged with the engagement protrusion 18 is provided on the inner side of the gripping claw 17 in the chuck radial direction. An inclined surface 20 a is provided on the upper surface 20 of the grasping claw 17 so that the upper surface 20 of the grasping claw 17 is smoothly engaged with the engaging portion 21. From this, the grasping claw 17 is guided from the inside in the chuck radial direction to the fitting groove 19 to be engaged with the engaging portion 21, and the engaging concave portion 22 is engaged with the engaging convex portion 18, so that the grasping claw 17 is The claw opening / closing member 11 is attached. Further, a ball plunger 24 exemplified as a positioning means provided with a projecting member (for example, a ball) 23 projecting forward of the chuck 1 at the tip of the claw opening / closing member 11 is provided, and the ball plunger 24 can be engaged with the ball 23 by positioning. A hole 25 is provided on the lower surface of the grasping claw 17, and the upper surface 20 of the grasping claw 17 that engages the ball 23 with the positioning hole 25 is engaged with the engaging portion 21 of the claw opening / closing member 11.

上記構成のチャック１は、チャック本体２に備えた取付ボルト３０により旋盤等の主軸部３１前端に固着され、主軸部３１の回転と共にチャック本体２が回転するようになっている。そして、主軸部３１後端に設置された回転シリンダ（図示しない）のピストン(図示しない)にコネクチングロッド３２を介して駆動部材５が連結され、ピストンの作動により駆動部材５がチャック軸線ＣＬ方向に前後移動するようになっている。このことから、ワークＷのクランプはピストンを後退させ、爪開閉部材１１を介してチャック半径方向内方に向かって移動する把握爪１７により案内部材９に備えたストッパ３３にワークＷを引き付けた状態（図１，２）であり、ワークＷのアンクランプはピストンを前進させ、爪開閉部材１１を介してチャック半径方向外方に向かって移動する把握爪１７がワークＷから離れた状態である。   The chuck 1 having the above configuration is fixed to the front end of a main shaft portion 31 such as a lathe by a mounting bolt 30 provided in the chuck main body 2 so that the chuck main body 2 rotates with the rotation of the main shaft portion 31. The driving member 5 is connected to a piston (not shown) of a rotating cylinder (not shown) installed at the rear end of the main shaft portion 31 via a connecting rod 32, and the driving member 5 is moved in the chuck axis CL direction by the operation of the piston. It is designed to move back and forth. From this, the clamp of the work W retracts the piston, and the work W is attracted to the stopper 33 provided in the guide member 9 by the grasping claw 17 that moves inward in the chuck radial direction via the claw opening / closing member 11. (FIGS. 1 and 2), and the unclamping of the workpiece W advances the piston, and the gripping claw 17 that moves outward in the chuck radial direction via the claw opening / closing member 11 is away from the workpiece W.

クランプするワークＷの変更等により爪開閉部材１１に装着された把握爪１７が交換される場合、本発明のように、爪開閉部材１１の先端のチャック半径方向内側に係合凸部１８を設け、爪開閉部材１１の前側に把握爪１７をチャック半径方向へ案内可能な嵌合溝１９と嵌合溝１９に案内された把握爪１７の上面２０に係合可能な係合部２１を設け、把握爪１７のチャック半径方向内側に前記係合凸部１８に係合可能な係合凹部２２を設け、把握爪１７をチャック半径方向内側から嵌合溝１９に案内させて係合部２１に係合させると共に、係合凹部２２を係合凸部１８に係合させて把握爪１７を爪開閉部材１１に装着するようにしたことで、従来のように、把握爪１７に嵌め込み部材を嵌め込まなくても把握爪１７を爪開閉部材１１に装着可能であり、嵌め込み部材を移動させる工具を用いることがないから速やかに把握爪１７の交換が行えることになる。また、爪開閉部材１１の先端にボールプランジャ２４を設け、そのボール２３が係合可能な位置決め孔２５が把握爪１７の下面に設けられ、位置決め孔２５にボール２３を係合した把握爪１７の上面２０が爪開閉部材１１の係合部２１に係合されることで、把握爪１７の交換時に把握爪１７が爪開閉部材１１から自重で落下しないために、一方の手で爪開閉部材１１から把握爪１７を取り外し、もう一方の手で交換する把握爪１７を爪開閉部材１１に装着することが可能となる。尚、本実施形態のような、駆動部材５の移動により爪開閉部材１１を揺動させて成るクランクレバー式チャックに限らず、駆動部材５の移動により爪開閉部材１１をチャック軸線ＣＬ方向に移動させて成るドローダウン式チャック等であってもよい。   When the grasping claw 17 attached to the claw opening / closing member 11 is replaced by changing the workpiece W to be clamped or the like, an engaging convex portion 18 is provided on the inner side in the chuck radial direction of the tip of the claw opening / closing member 11 as in the present invention. A fitting groove 19 capable of guiding the grasping claw 17 in the chuck radial direction and an engaging portion 21 engageable with the upper surface 20 of the grasping claw 17 guided by the fitting groove 19 are provided on the front side of the claw opening / closing member 11. An engagement concave portion 22 that can be engaged with the engagement convex portion 18 is provided on the inner side of the gripping claw 17 in the chuck radial direction, and the gripping claw 17 is guided from the inner side of the chuck radial direction to the fitting groove 19 to be engaged with the engagement portion 21. In addition, the gripping claw 17 is attached to the claw opening / closing member 11 by engaging the engagement concave portion 22 with the engagement convex portion 18, so that the fitting member is not fitted into the gripping claw 17 as in the prior art. Even if grasping nail 17 is attached to nail opening and closing member 11 , And the thus capable of performing exchange of quickly grasping pawl 17 there is no necessity to use a tool to move the fitting member. Further, a ball plunger 24 is provided at the tip of the claw opening / closing member 11, a positioning hole 25 in which the ball 23 can be engaged is provided in the lower surface of the grasping claw 17, and the grasping claw 17 having the ball 23 engaged with the positioning hole 25 is provided. Since the upper surface 20 is engaged with the engaging portion 21 of the claw opening / closing member 11, the grasping claw 17 does not fall from the claw opening / closing member 11 by its own weight when the grasping claw 17 is replaced. The grasping claw 17 can be removed from the nail and the grasping claw 17 to be replaced with the other hand can be attached to the claw opening / closing member 11. The claw opening / closing member 11 is moved in the chuck axis CL direction by the movement of the driving member 5 as well as the crank lever type chuck in which the claw opening / closing member 11 is swung by the movement of the driving member 5 as in the present embodiment. It may be a drawdown chuck or the like.

本発明のチャックを示す図である。It is a figure which shows the chuck | zipper of this invention. 図１のＩＩ−ＩＩ線断面図である。It is the II-II sectional view taken on the line of FIG. 爪開閉部材の先端と把握爪を示す参考斜視図である。It is a reference perspective view which shows the front-end | tip and grasping nail | claw of a nail | claw opening / closing member.

符号の説明Explanation of symbols

１ チャック
１１ 爪開閉部材
１７ 把握爪
１８ 係合凸部
１９ 嵌合溝
２０ 上面
２１ 係合部
２２ 係合凹部
２３ ボール
２４ ボールプランジャ
２５ 位置決め孔 DESCRIPTION OF SYMBOLS 1 Chuck 11 Claw opening / closing member 17 Grasp claw 18 Engagement convex part 19 Engagement groove 20 Upper surface 21 Engagement part 22 Engagement recessed part 23 Ball 24 Ball plunger 25 Positioning hole

Claims (1)

チャック本体にチャック半径方向に移動可能な複数の爪開閉部材を設け、各爪開閉部材の先端には把握爪が装着され、チャック軸線方向に移動可能な駆動部材により爪開閉部材をチャック半径方向に移動させて各把握爪をワークに対してクランプ、アンクランプ動作させるようにしたチャックにおいて、前記爪開閉部材の先端のチャック半径方向内側に係合凸部を設け、爪開閉部材の前側に把握爪をチャック半径方向へ案内可能な嵌合溝と嵌合溝に案内された把握爪の上面にチャック前方より被さって係合可能な係合部を設け、把握爪のチャック半径方向内側に前記係合凸部に係合可能な係合凹部を設け、把握爪をチャック半径方向内側から嵌合溝に案内させて係合部に係合させると共に、係合凹部を係合凸部に係合させて把握爪を爪開閉部材に装着して成り、爪開閉部材の先端にチャックの前方に突出するボールを備えたボールプランジャを設け、そのボールが係合可能な位置決め孔を把握爪の下面の前記係合部よりチャック半径方向内側に設け、位置決め孔にボールを係合した前記把握爪の上面が爪開閉部材の前記係合部に係合するようにし、前記係合部を前記ボールプランジャの取付位置よりもチャック半径方向外方かつ前記嵌合溝の幅方向両側に設けたことを特徴とするチャック。 The chuck body is provided with a plurality of claw opening / closing members that can move in the chuck radial direction. A gripping claw is attached to the tip of each claw opening / closing member, and the claw opening / closing member is moved in the chuck radial direction by a drive member that can move in the chuck axis direction. In the chuck in which each gripping claw is moved and clamped and unclamped with respect to the workpiece, an engaging convex portion is provided on the inner side in the chuck radial direction of the tip of the claw opening / closing member, and the gripping claw is provided on the front side of the claw opening / closing member. Is provided with a fitting groove that can be guided in the chuck radial direction, and an engaging portion that can be engaged with the upper surface of the gripping claw guided by the fitting groove from the front of the chuck. An engagement recess that can be engaged with the projection is provided, and the gripping claw is guided from the inside in the chuck radial direction to the engagement groove to be engaged with the engagement portion, and the engagement recess is engaged with the engagement projection. Nail opening and closing part And attached to become a ball plunger having a ball which projects forwardly of the chuck at the tip of the claw opening and closing member is provided, the chuck radially from the engagement portion of the lower surface of the grasping claws that ball engageable with the positioning holes An upper surface of the gripping claw, which is provided on the inner side and engages the ball with the positioning hole, engages with the engagement portion of the claw opening / closing member, and the engagement portion is located outside the mounting position of the ball plunger in the chuck radial direction. And a chuck provided on both sides in the width direction of the fitting groove .
JP2007206613A 2007-08-08 2007-08-08 Chuck Active JP5077746B2 (en)

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JP5077746B2 true JP5077746B2 (en) 2012-11-21

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116174759B (en) * 2023-04-21 2024-07-05 狼爪机床(河北)有限公司 Connecting rod type machine tool compaction chuck clamp mechanism for workpiece machining

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5924904A (en) * 1982-07-28 1984-02-08 Howa Mach Ltd Mechanical chuck
DE3337047C2 (en) * 1983-10-12 1987-03-19 SMW Schneider & Weißhaupt GmbH, 7996 Meckenbeuren Device for coupling an attachment jaw with a base jaw of a chuck
FR2584960B1 (en) * 1985-07-17 1987-10-02 Sandvik Tobler CLAMPING CHANGE SYSTEM ON A MACHINE TOOL
JPH0340496Y2 (en) * 1985-09-26 1991-08-26
DE102005031142A1 (en) * 2005-07-04 2007-01-18 Forkardt Deutschland Gmbh Clamping device, base jaws and top jaws for this

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