JP2006326747A - Chuck device, tool for exchanging sub-pawl, method for mounting sub-pawl, and method for removing sub-pawl - Google Patents

Chuck device, tool for exchanging sub-pawl, method for mounting sub-pawl, and method for removing sub-pawl Download PDF

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JP2006326747A
JP2006326747A JP2005152940A JP2005152940A JP2006326747A JP 2006326747 A JP2006326747 A JP 2006326747A JP 2005152940 A JP2005152940 A JP 2005152940A JP 2005152940 A JP2005152940 A JP 2005152940A JP 2006326747 A JP2006326747 A JP 2006326747A
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child
claws
claw
jig
parent
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Tsunaharu Kimura
津奈治 木村
Kazukiyo Nakagawa
一清 仲川
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a chuck device capable of facilitating operation for mounting a plurality of sub-pawls to a plurality of main pawls by a plurality of screw members. <P>SOLUTION: This chuck device comprises a plurality of main pawls displaceably mounted to a chuck body 10 in a radial direction, a plurality of screw members 30 screwed with a plurality of the main pawls, and a plurality of sub-pawls 40, to which a large-diameter hole larger than a head of the screw member and a small-diameter hole 47 smaller than the head and larger than the leg of the screw member are continuously formed. In this chuck device, when the respective sub-pawls are removed and mounted from and to the respective main pawls, the head of the screw member enters the large-diameter hole of the sub-pawl without removing the screw member from the main pawl. When the respective sub-pawls are fastened and fixed to the respective main pawls, the leg of the screw member is positioned to the small-diameter hole of the sub-pawl, and the edge of the small-diameter hole is fastened to the main pawl by the head. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、親爪及び子爪を備えたチャック装置、このチャック装置で親爪に対して子爪を取付け及び取外するために使用される子爪交換用治具、治具で子爪を親爪へ取り付ける子爪取付け方法、治具で子爪を親爪から取り外す子爪取外し方法に関する。   The present invention relates to a chuck device provided with a parent claw and a child claw, a child claw replacement jig used for attaching and removing the child claw to and from the parent claw with this chuck device, and a child claw with a jig. The present invention relates to a child claw attaching method for attaching to a parent nail and a child nail removing method for removing a child claw from a parent nail with a jig.

旋盤等の工作機械で被加工物(ワーク)を把持するチャック装置の一種に、親爪と子爪とから成る親子爪がある。親子爪の一種に、回転可能なチャック本体に半径方向に変位可能に取り付けられた親爪に、ワークの形状、寸法に応じた形状、寸法の子爪を着脱するものがある。ワークの種類が変わるときは、親爪を半径方向内向き又は外向きに移動させてチャック装置を開閉し、ワークの種類に応じて子爪を交換する。   One type of chuck device that holds a workpiece (workpiece) with a machine tool such as a lathe is a parent-child claw composed of a parent claw and a child claw. One type of parent and child claws includes a parent claw that is attached to a rotatable chuck main body so as to be displaceable in the radial direction, and a child claw having a shape and size corresponding to the shape and size of the workpiece is attached and detached. When the type of workpiece changes, the chuck is opened and closed by moving the parent claw inward or outward in the radial direction, and the child claw is replaced according to the type of workpiece.

例えば従来のチャック爪(特許文献1参照)は、ワークを把持する三つの交換爪(子爪)と、交換爪が取付け固定される三つのマスタ爪(親爪)と、交換爪をマスタ爪に取付け固定する三組(合計六本)のボルト対とから成る。マスタ爪はチャック本体のマスタジョウに取り付けられ、その外周に形成され円弧状突縁から成る位置決め部の内面が径方向取付け基準面となっている。交換爪はその外周面がマスタ爪の径方向取付け基準面に当接されて半径方向で位置決めされる。位置決めされた交換爪はボルトでマスタ爪に取付け固定される。
特開平5−192807号公報
For example, a conventional chuck claw (see Patent Document 1) includes three exchange claws (child claws) for gripping a workpiece, three master claws (parent claws) to which the exchange claws are attached and fixed, and the exchange claws as master claws. It consists of three pairs (6 in total) of bolts to be fixed. The master claw is attached to the master jaw of the chuck main body, and the inner surface of the positioning portion formed on the outer periphery of the master claw and having an arcuate protruding edge serves as a radial attachment reference surface. The replacement claw is positioned in the radial direction with its outer peripheral surface being in contact with the radial mounting reference surface of the master claw. The positioned replacement claw is attached and fixed to the master claw with a bolt.
JP-A-5-192807

上記従来のチャック爪では、ワークの種類が変わるときは、現在取り付けている交換爪を別の交換爪に交換する際、以下の点で改良の余地があった。第1に、交換爪の交換時はねじ部材を親爪から外し、交換爪の交換後、再度ボルトを親爪に取り付けなければならない。つまり、ボルトを緩めてその雄ねじをマスタ爪の雌ねじから外し、現在の交換爪をマスタ爪から取り外す。次に、新しい交換爪をマスタ爪上にセットし、ボルトの雄ねじを新しい交換爪の貫通孔に挿通し、マスタ爪の雌ねじに螺合させる必要がある。このように、交換爪の交換の度にボルトを親爪に対して着脱し、交換爪をマスタ爪に対して位置決めしければならないので、時間及び手間がかかり、面倒である。   In the conventional chuck claw, when the type of workpiece is changed, there is room for improvement in the following points when the currently installed replacement claw is replaced with another replacement claw. First, when replacing the replacement claw, the screw member must be removed from the parent claw, and after replacing the replacement claw, the bolt must be attached to the parent claw again. That is, the bolt is loosened and the male screw is removed from the female screw of the master claw, and the current replacement claw is removed from the master claw. Next, it is necessary to set a new replacement claw on the master claw, insert the male screw of the bolt into the through hole of the new replacement claw, and screw it into the female screw of the master claw. In this way, each time the replacement claw is replaced, the bolt must be attached to and detached from the parent claw, and the replacement claw must be positioned with respect to the master claw, which is time consuming and laborious.

第2に、上記ボルトの着脱及び交換爪のマスタ爪に対する位置決めを、各親爪について、つまり三回行なわなければならない。交換作業の繰返しは時間及び手間がかかり、面倒である。第3に、子爪を手で親爪に押し付けてボルトを締める際、ボルトの頭部と子爪との間の摩擦で子爪の位置がずれることがある。   Secondly, the mounting and dismounting of the bolt and the positioning of the replacement claw with respect to the master claw must be performed for each parent claw, that is, three times. Repeating the replacement work takes time and effort, and is troublesome. Third, when the child claws are pressed against the parent claws by hand and the bolts are tightened, the position of the child claws may be shifted due to friction between the heads of the bolts and the child claws.

本発明は上記課題に鑑みてなされたもので、複数のねじ部材による複数の子爪の複数の親爪への取付け作業が容易になるチャック装置、親爪に対する子爪の交換に使用される子爪交換用治具、治具により子爪を親爪へ取り付ける子爪取付け方法、及び治具により子爪を親爪から取り外す子爪取外しけ方法を提供することを目的とする。   The present invention has been made in view of the above problems, and a chuck device that makes it easy to attach a plurality of child claws to a plurality of parent claws by a plurality of screw members, and a child used for replacing child claws with respect to the parent claws. It is an object of the present invention to provide a claw replacement jig, a claw attachment method for attaching a claw to a parent claw with a jig, and a child claw removal method for removing a claw from a parent claw with a jig.

本願の発明者は、複数の子爪を複数のねじ部材で複数の親爪にそれぞれ取り付けるに際し、ねじ部材を親爪から外さず、しかも複数の子爪を複数の親爪に同時に取り付けることを着想して、本発明を完成した。   The inventor of the present application conceived that when attaching a plurality of child claws to a plurality of parent claws with a plurality of screw members, the screw members are not detached from the parent claws, and a plurality of child claws are attached to the plurality of parent claws simultaneously. Thus, the present invention has been completed.

(1)本発明のチャック装置は、請求項1に記載したように、チャック本体に半径方向に変位可能に装着された複数の親爪と、複数の親爪に螺合された複数のねじ部材と、ねじ部材の頭部よりも大きな大径孔及び頭部よりも小さくねじ部材の脚部よりも大きい小径孔が連続して形成された複数の子爪と、を備えている。   (1) As described in claim 1, the chuck device of the present invention includes a plurality of parent claws that are mounted on the chuck body so as to be displaceable in the radial direction, and a plurality of screw members that are screwed to the plurality of parent claws. And a plurality of child claws in which a large diameter hole larger than the head of the screw member and a small diameter hole smaller than the head and larger than the leg portion of the screw member are continuously formed.

各親爪に対する各子爪の取外し時及び取付け時はねじ部材を親爪から外すことなく子爪の大径孔に各ねじ部材の頭部を進入させ、各親爪への各子爪の締付け固定時は子爪の小径部にねじ部材の脚部を位置させ頭部で小径孔の縁部を親爪に締め付ける。   When removing and attaching each child claw to each parent nail, the head of each screw member enters the large-diameter hole of the child nail without removing the screw member from the parent nail, and tightening each child nail to each parent nail At the time of fixing, the leg portion of the screw member is positioned at the small diameter portion of the child claw, and the edge portion of the small diameter hole is fastened to the parent nail by the head portion.

請求項2のチャック装置は、子爪の大径孔及び小径孔は子爪の円弧方向に連続して形成されただるま孔から成る。請求項3のチャック装置は、各親爪に2本のねじ部材が螺合され、各子爪に二つのだるま孔が円弧方向に離れて形成されている。   In the chuck device according to the second aspect, the large-diameter hole and the small-diameter hole of the child claw are formed by a saddle hole formed continuously in the arc direction of the child claw. In the chuck device of the third aspect, two screw members are screwed to each parent claw, and two dart holes are formed in each child claw so as to be separated in the arc direction.

(2)本発明の子爪交換用治具は、請求項4に記載したように、チャック本体に半径方向に変位可能に装着されねじ部材が螺合された複数の親爪に対して、ねじ部材の頭部よりも大きい大径孔、大径孔に連続し頭部よりも小さくねじ部材の脚部よりも大きい小径孔、及び被保持部が形成された複数の子爪を同時に取り外し及び取り付けるために使用される子爪交換用治具である。この子爪交換用治具は棒状の本体部と、本体部と一体化された中空円板部とを備え、中空円板部はねじ部材で複数の親爪に締め付けられている複数の子爪の被保持部、及び複数の親爪に取り付けられる複数の子爪の被保持部に挿入される子爪把持部が形成され、軸線の回りに回動可能である。   (2) According to a fourth aspect of the present invention, there is provided a child claw replacement jig which is provided with a screw for a plurality of parent claws to which a screw member is screwed and mounted on a chuck body so as to be displaceable in a radial direction. Remove and attach simultaneously a large diameter hole larger than the head of the member, a small diameter hole continuous with the large diameter hole and smaller than the head and larger than the leg of the screw member, and a plurality of child claws formed with held parts It is a jig | tool for the child nail | claw replacement | exchange used for this. This child claw replacement jig includes a rod-shaped main body portion and a hollow disc portion integrated with the main body portion, and the hollow disc portion is tightened to a plurality of parent claws with a screw member. And a child claw gripping portion inserted into a plurality of child claw to-be-held portions attached to the plurality of parent claws are formed, and can be rotated around an axis.

複数の子爪の取外し時は、治具の子爪保持部を複数の子爪の被保持部に挿入しねじ部材を緩めた後治具を軸線の回りに回動させ複数の子爪を同時に円弧方向に移動させ、頭部が大径孔に進入したとき治具を軸方向に移動させて子爪を親爪から外す。これに対して、複数の子爪の取付け時は、治具の子爪保持部に複数の子爪の被保持部を挿入し、治具を軸方向に移動させ軸線の回りに回動して複数の子爪を円弧方向に移動させ、脚部が小径孔に位置したときねじ部材を締め付ける。   When removing the multiple claws, insert the jig's claws holding part into the held parts of the plural claws, loosen the screw member, and then rotate the jig around the axis to move the plural claws simultaneously. Move in the arc direction, and when the head enters the large-diameter hole, move the jig in the axial direction to remove the child claw from the parent claw. On the other hand, when attaching a plurality of child claws, insert the held portions of the plurality of child claws into the child claw holding portion of the jig, move the jig in the axial direction, and rotate it around the axis. The plurality of child claws are moved in the arc direction, and the screw member is tightened when the leg portion is positioned in the small diameter hole.

請求項5の子爪交換用治具は、子爪保持部は中空円板部の一面に立設されたピンから成り、被保持部は子爪に形成されたピン孔から成る。請求項6の子爪交換用治具は、更に、複数の子爪の取付け時、治具の半径方向及び軸方向で複数の子爪を位置決めする位置決め部を有する。請求項7の子爪交換用治具は、位置決め部は、中空円板部の外周に形成され各子爪に形成された円弧溝に嵌入される環状部から成る。請求項8の子爪交換用治具は、中空円板部はその厚さ方向に貫通する工具挿入孔が形成され、中空円板部の他面から工具挿入孔に挿入した工具でねじ部材を回転させる。   According to a fifth aspect of the present invention, there is provided a child claw replacement jig in which the child claw holding portion is formed of a pin standing on one surface of the hollow disc portion, and the held portion is formed of a pin hole formed in the child claw. According to a sixth aspect of the present invention, there is provided a child claw replacement jig further comprising a positioning portion for positioning the plurality of child claws in the radial direction and the axial direction of the jig when the plurality of child claws are attached. According to a seventh aspect of the present invention, there is provided a child claw replacement jig in which the positioning portion is formed of an annular portion formed on the outer periphery of the hollow disc portion and fitted in an arc groove formed in each child claw. In the child claw replacement jig according to claim 8, the hollow disc portion has a tool insertion hole penetrating in the thickness direction, and the screw member is inserted with the tool inserted into the tool insertion hole from the other surface of the hollow disc portion. Rotate.

(3)本発明の子爪取付け方法は、請求項9に記載したように、チャック本体に半径方向に変位可能に取り付けられねじ部材が螺合された複数の親爪に、一つの治具で複数の子爪を同時に取り付ける方法である。この子爪取付け方法は、治具の子爪保持部で複数の子爪を保持し親爪に接近させねじ部材の頭部を子爪に形成されねじ部材の頭部よりも大きな大径孔に進入させる進入工程と、治具を軸線の回りに回動させ複数の子爪を同時に円弧方向に移動させ、ねじ部材の脚部を頭部よりも小さく脚部よりも大きい小径孔内に位置させる移動工程と、ねじ部材を締め子爪の小径孔の縁部をねじ部材の頭部で親爪に締め付ける締付け工程と、複数の親爪に締め付けられた複数の子爪から治具を抜く抜き工程と、を備えている。   (3) The method of attaching the child claws according to the present invention is as described in claim 9, wherein a single jig is attached to a plurality of parent claws that are attached to the chuck body so as to be displaceable in the radial direction and screw members are screwed together. It is a method of attaching a plurality of child claws simultaneously. This method of attaching the child claws is to hold a plurality of child claws by the child claws holding portion of the jig and bring them close to the parent claws, and the head of the screw member is formed on the child claws and has a larger diameter hole than the head of the screw member. The approach step for entering, the jig is rotated around the axis, and the plurality of child claws are simultaneously moved in the arc direction so that the leg portion of the screw member is positioned in the small diameter hole that is smaller than the head portion and larger than the leg portion. A moving step, a tightening step for tightening the edge of the small diameter hole of the screw member to the parent nail with the head of the screw member, and a step for removing the jig from the plurality of child claws fastened to the plurality of parent nails And.

請求項10の子爪取付け方法は、進入工程において、治具に立設した複数のピンを各子爪に形成したピン孔に挿入し、治具で子爪を保持する。請求項11の子爪取付け方法は、移動工程は、治具に形成された環状部を各子爪に形成された円弧溝に嵌合させ、子爪を治具に対して半径方向及び軸方向で位置決めする位置決め工程を含む。請求項12の子爪取付け方法は、締付け工程において、治具で各子爪を各親爪に押し付け、治具に形成された工具挿通孔に挿通した工具を頭部に係合させてねじ部材を締める。   According to a tenth aspect of the present invention, in the approach step, a plurality of pins erected on the jig are inserted into pin holes formed in the respective sub claws, and the sub claws are held by the jig. In the child claw attachment method according to claim 11, in the moving step, the annular portion formed in the jig is fitted into an arc groove formed in each child claw, and the child claw is radially and axially oriented with respect to the jig. And a positioning step of positioning with. The method of attaching the child claws according to claim 12 is a screw member in which, in the tightening step, each of the child claws is pressed against each parent nail with a jig, and a tool inserted through a tool insertion hole formed in the jig is engaged with the head. Tighten.

(4)第4発明の子爪取外し方法は、請求項13に記載したように、チャック本体に半径方向に変位可能に取り付けられた複数の親爪に複数のねじ部材がそれぞれ螺合され、ねじ部材により親爪に締付けられねじ部材の頭部よりも大きい大径孔、大径孔に連続し頭部よりも小さくねじ部材の脚部よりも大きい小径孔及び被保持部が形成された複数の子爪を、被保持部に挿入される保持部を有する一つの治具で複数の親爪から同時に取り外す方法である。   (4) According to a fourth aspect of the present invention, there is provided a child claw removing method in which a plurality of screw members are respectively screwed into a plurality of parent claws attached to the chuck body so as to be displaceable in the radial direction. A plurality of large-diameter holes larger than the head of the screw member and a small-diameter hole that is continuous with the large-diameter hole and smaller than the head and larger than the leg portion of the screw member In this method, the child claws are simultaneously removed from the plurality of parent claws with one jig having a holding portion inserted into the held portion.

この子爪取外し方法は、治具の子爪保持部を複数の子爪の被保持部に挿入する挿入工程と、脚部が小径孔に位置しているねじ部材を緩め頭部による各子爪の小径孔の縁部の締付けを開放する開放工程と、治具を軸線の回りに回動させて複数の子爪を円弧方向に移動させねじ部材の頭部を大径孔に進入させる移動工程と、治具を親爪から離間させ複数の子爪を複数の親爪から外す外し工程と、を備えている。   This child claw removal method includes an insertion step of inserting the child claw holding portion of the jig into the held portions of the plurality of child claws, and loosening the screw member whose leg portion is positioned in the small diameter hole, An opening step for releasing the tightening of the edge of the small-diameter hole, and a moving step for rotating the jig around the axis to move the plurality of child claws in the arc direction so that the head of the screw member enters the large-diameter hole. And a removing step of separating the jig from the parent nail and removing the plurality of child nails from the plurality of parent nails.

第1発明のチャック装置によれば、子爪を親爪に固定するねじ部材を親爪に螺合したままで子爪が着脱できる。取外し時は、ねじ部材を緩めて子爪を移動させ頭部を大径孔に進入させれば良い。取付け時は、子爪の大径孔に頭部を進入させ子爪を円弧方向に移動させ脚部を小径孔に位置させてねじ部材を締めればよい。このように、子爪の交換時にねじ部材の着脱が不要なので、子爪の交換が容易になり、交換に要する時間が短縮できる。   According to the chuck device of the first invention, the child claws can be attached and detached while the screw members for fixing the child claws to the parent claws are screwed together. At the time of removal, the screw member is loosened and the child claws are moved so that the head enters the large-diameter hole. At the time of attachment, the head may be inserted into the large-diameter hole of the child claw, the child claw may be moved in the arc direction, the leg portion may be positioned in the small-diameter hole, and the screw member may be tightened. Thus, since it is not necessary to attach and detach the screw member when replacing the child claws, the child claws can be easily replaced, and the time required for replacement can be shortened.

請求項2のチャック装置によれば、子爪の大径孔と小径孔とがだるま孔から成るので、親爪に対する子爪の着脱、子爪の移動及びねじ部材による子爪の親爪への締付けが容易になる。請求項3のチャック装置によれば、各親爪に二本のねじ部材が螺合され、各子爪に二つのだるま孔が形成されているので、ねじ部材による子爪の親爪への締付けが確実になる。   According to the chuck device of the second aspect, since the large-diameter hole and the small-diameter hole of the child claw are formed of a daruma hole, the child claw is attached to and detached from the parent claw, the child claw is moved, and the child claw is moved to the parent claw by the screw member Tightening becomes easy. According to the chuck device of the third aspect, since the two screw members are screwed to each parent nail and the two dart holes are formed in each child nail, the child member is fastened to the parent nail by the screw member. Is certain.

第2発明の子爪交換用治具によれば、取外し時は、子爪保持部が複数の子爪の被保持部に同時に挿入され回動により複数の子爪を同時に移動させ、子爪の大径孔にねじ部材の頭部が進入したとき、軸方向に移動させれば良い。取付け時は、複数の子爪を同時に保持し、子爪の大径孔にねじ部材の頭部が進入した後回動により複数の子爪を同時に移動させ、小径孔内にねじ部材の脚部を位置させる。このように、複数の親爪に対して一つの治具で複数の子爪を同時に着脱できるので、子爪の交換が容易になり、交換に要する時間が短縮できる。   According to the child claw replacement jig of the second invention, when the child claw is removed, the child claw holding portion is simultaneously inserted into the held portions of the plurality of child claws, and the plurality of child claws are simultaneously moved by rotation, so that the child claw When the head of the screw member enters the large-diameter hole, it may be moved in the axial direction. When attaching, hold the multiple claws at the same time, and after the head of the screw member enters the large-diameter hole of the claws, move the multiple claws simultaneously by turning, and the screw member legs in the small-diameter hole Position. As described above, since the plurality of child claws can be simultaneously attached to and detached from the plurality of parent claws with one jig, the child claws can be easily replaced, and the time required for the replacement can be shortened.

請求項5の子爪交換用治具によれば、簡単な構成の治具で複数の子爪を確実に保持でき、しかも複数の子爪を同時に円弧方向に移動できる。請求項6及び7の子爪交換用治具によれば、子爪の取付け時に、子爪の移動後ねじ部材で親爪に固定する前に治具に対して子爪が位置決めされ、親爪に対して所定の芯出し状態が実現される。請求項8の子爪交換用治具によれば、治具の工具挿入孔から工具を挿入できるので、頭部が子爪と治具との間にあるねじ部材を回すことができる。   According to the child claw replacement jig of the fifth aspect, the plurality of child claws can be reliably held by the jig having a simple structure, and the plurality of child claws can be simultaneously moved in the arc direction. According to the child claw replacement jig of claims 6 and 7, when the child claw is attached, the child claw is positioned with respect to the jig before the child claw is fixed to the parent claw after the child claw is moved. A predetermined centering state is realized. According to the child claw replacement jig of the eighth aspect, since the tool can be inserted from the tool insertion hole of the jig, the screw member having the head between the child claw and the jig can be turned.

第3発明の子爪取付け方法によれば、治具により複数の子爪の大径孔に複数の親爪に螺合されたねじ部材の頭部を同時に進入させ、治具により複数の子爪を同時に円弧方向に移動させて小径孔内に脚部を位置させることができ、ねじ部材を締めれば子爪が親爪に同時に締め付け固定される。このように、子爪の取付け時にねじ部材を親爪から外すことが不要で、しかも治具で複数の子爪を同時に保持及び移動できるので、子爪の取付けが容易になり、子爪の取付けに要する時間を短縮できる。   According to the child claw mounting method of the third invention, the heads of the screw members screwed into the plurality of parent claws are simultaneously entered into the large-diameter holes of the plurality of child claws by the jig, and the plurality of child claws are moved by the jig. Can be moved in the arc direction at the same time to position the leg portion in the small-diameter hole, and if the screw member is tightened, the child claws are simultaneously fastened and fixed to the parent claws. In this way, it is not necessary to remove the screw member from the main claws when attaching the child claws, and since a plurality of child claws can be simultaneously held and moved by the jig, the attachment of the child claws is facilitated. Can be shortened.

請求項10の子爪取付け方法によれば、治具による子爪の保持、及び子爪の大径孔へのねじ部材の頭部の進入が確実になる。請求項11の子爪取付け方法によれば、ねじ部材で子爪を親爪に固定する前に、治具の環状部と各子爪の円弧溝との係合により子爪が所定状態に芯出しされる。請求項12の子爪取付け方法によれば、治具の工具挿入孔を貫通させた工具でねじ部材を回すことができ、ねじ部材による子爪の固定が容易になる。また、治具で各子爪を各親爪に押圧するので、ねじ部材の回転時に子爪が半径方向や円弧方向にずれにくい。   According to the method for attaching the child claws of the tenth aspect, the holding of the child claws by the jig and the entry of the head of the screw member into the large-diameter hole of the child claws are ensured. According to the child claw attachment method of claim 11, before the child claw is fixed to the parent claw with the screw member, the child claw is brought into a predetermined state by the engagement between the annular portion of the jig and the arc groove of each child claw. It is issued. According to the method for attaching the child claws of the twelfth aspect, the screw member can be turned with a tool penetrating the tool insertion hole of the jig, and the child claws can be easily fixed by the screw member. Further, since each child claw is pressed against each parent claw by the jig, the child claw is not easily displaced in the radial direction or the arc direction when the screw member is rotated.

第4発明の子爪取外し方法によれば、治具の子爪保持部を各子爪の被保持部に挿入し、ねじ部材を緩め、治具を回動させて複数の子爪を同時に円弧方向に移動させた後治具を引くのみで、複数の親爪から複数の子爪が取り外される。ねじ部材を外さず、しかも複数の子爪が治具により同時に移動及び保持されるので、子爪の取外しが容易になり、子爪の取外しに要する時間を短縮できる。   According to the child claw removing method of the fourth invention, the child claw holding portion of the jig is inserted into the held portion of each child claw, the screw member is loosened, and the jig is rotated to simultaneously arc the plurality of child claws. The plurality of child claws are removed from the plurality of parent claws simply by pulling the jig after moving in the direction. Since the plurality of child claws are simultaneously moved and held by the jig without removing the screw member, the child claws can be easily removed, and the time required to remove the child claws can be shortened.

<種々の態様>
(イ)チャック装置
チャック装置はチャック本体と、複数の親爪と、複数(親爪と同数)の子爪とを含む。円筒形状を有しその軸線の回りに回転されるチャック本体に、複数の親爪が少なくとも半径方向に変位可能に装着されている。親爪はワークの着脱時は半径方向外向きに変位した位置にあり、ワークの加工時は半径方向内向きに変位した位置にある。なお、半径方向に変位するとともに軸方向に変位しても良い。
<Various aspects>
(A) Chuck device The chuck device includes a chuck body, a plurality of parent claws, and a plurality (the same number of parent claws) of child claws. A plurality of parent claws are mounted on a chuck main body having a cylindrical shape and rotated about its axis so as to be displaceable at least in the radial direction. The parent claw is at a position displaced outward in the radial direction when the workpiece is attached and detached, and at a position displaced inward in the radial direction when processing the workpiece. In addition, it may be displaced in the axial direction as well as in the radial direction.

複数の親爪のそれぞれにねじ部材が螺合されており、立設方向は変位方向と直交する方向であることが望ましい。本発明のねじ部材は常時親爪に螺合され、親爪から外されることはない。子爪の取付け時及び取外し時は緩められ、子爪の固定時は締め付けられる。   A screw member is screwed to each of the plurality of parent claws, and the standing direction is preferably a direction orthogonal to the displacement direction. The screw member of the present invention is always screwed into the parent claw and is not removed from the parent claw. It is loosened when the child claws are attached and removed, and tightened when the child claws are fixed.

ねじ部材は親爪に螺合されている脚部と、子爪の小径孔の縁部を親爪に締め付ける頭部とを持つ。頭部に十字孔や六角孔の工具係合孔が形成されていることが望ましい。ねじ部材の種類はボルト、子ねじ又は皿ねじなどの何れでも良く、一つの親爪当たりのねじ部材の本数は一本でも良いが、複数本(例えば二本)であることが望ましい。   The screw member has a leg portion screwed into the parent nail and a head portion for tightening the edge of the small-diameter hole of the child nail to the parent nail. It is desirable that a tool engagement hole such as a cross hole or a hexagon hole is formed in the head. The type of screw member may be any of a bolt, a child screw, a countersunk screw, and the like, and the number of screw members per parent claw may be one, but a plurality (for example, two) is desirable.

複数の親爪のそれぞれに一つの子爪が取り付けられ、従って子爪の個数は親爪の個数と同じである。各子爪は全体として扇形状を持ち、径方向内周の円弧状のワーク把持部と、径方向中間の円弧方向に連続して形成された大径孔及び小径孔と、径方向外周の円弧状の位置決め用案内部とを持つことができる。なお、大径孔及び小径孔は径方向中間に形成された横断面矩形状の円弧溝の底部に形成されることが望ましい。   One child claw is attached to each of the plurality of parent claws, and therefore the number of child claws is the same as the number of parent claws. Each child claw has a fan shape as a whole, an arc-shaped workpiece gripping portion on the radially inner periphery, a large-diameter hole and a small-diameter hole formed continuously in the radially intermediate arc direction, and a radially outer circle And an arcuate positioning guide. The large-diameter hole and the small-diameter hole are preferably formed at the bottom of an arc groove having a rectangular cross section formed in the middle in the radial direction.

大径孔の内径はねじ部材の頭部の外径よりも大きく、従って頭部が進入可能である。小径孔の内径は頭部の外径よりも小さく、脚部の外径よりも大きく、頭部の端面で親爪に押し付けられる縁部を持つ。小径孔からワーク把持部までの距離がワークの外径に対応して変化する。大径孔と小径孔とは子爪の円弧方向に連続して形成されただるま孔から成ることができ、だるま孔の個数は上記ねじ部材の本数に対応する。例えば二つのだるま孔を設けた場合、一方の大径孔と他方の大径孔とのピッチ、及び一方の小径孔と他方の小径孔とのピッチは、それぞれ二本のねじ部材のピッチと等しくする。また、各子爪は治具の子爪保持部(例えばピン)が挿入される被保持部(例えばピン孔)を持つことができる。   The inner diameter of the large-diameter hole is larger than the outer diameter of the head of the screw member, so that the head can enter. The inner diameter of the small-diameter hole is smaller than the outer diameter of the head, larger than the outer diameter of the leg, and has an edge that is pressed against the parent nail at the end face of the head. The distance from the small-diameter hole to the workpiece gripping portion changes corresponding to the outer diameter of the workpiece. The large-diameter hole and the small-diameter hole can be formed by sag holes formed continuously in the arc direction of the child claws, and the number of sag holes corresponds to the number of the screw members. For example, when two daruma holes are provided, the pitch between one large-diameter hole and the other large-diameter hole and the pitch between one small-diameter hole and the other small-diameter hole are equal to the pitch of the two screw members, respectively. To do. Each child claw can have a held portion (for example, a pin hole) into which a child claw holding portion (for example, a pin) of the jig is inserted.

各親爪に対する各子爪の取外し時及び取付け時は、子爪の大径孔に各ねじ部材の頭部を進入させる。例えば、子爪の取付け時は各子爪の大径孔に各ねじ部材の頭部を進入させ、
各親爪への各子爪の締付け固定時は子爪の小径部にねじ部材の脚部を位置させ頭部で小径孔の縁部を親爪に締め付ける。
When the child claws are removed from and attached to the parent claws, the heads of the screw members are inserted into the large-diameter holes of the child claws. For example, when attaching the child claws, let the head of each screw member enter the large diameter hole of each child claw,
When tightening and fixing each child claw to each parent nail, the leg portion of the screw member is positioned on the small diameter portion of the child nail, and the edge of the small diameter hole is tightened to the parent nail with the head.

(ロ)子爪交換用治具
本発明の子爪交換用治具は、複数の親爪に対して複数の子爪を同時に取り付け及び同時に取り外すために使用されるもので、棒状の本体部と、その軸方向中間部に一体化された中空円板部(例えばフランジ部)とを含む。本体部は作業者が持つ部分であり、フランジ部は複数の子爪を保持する部分である。ここで、「子爪」は、現在親爪に締付け固定されており交換により親爪から取り外される子爪(以下必要に応じて「取外し子爪」と呼ぶ)と、現在取り外されており新たに親爪に締め付け固定される子爪(以下、必要に応じて「取付け子爪」と呼ぶ)の両方を含む。治具は親爪に接近及び離間する方向に移動可能で、しかもその軸線の回りに回動される。
(B) A sub-claw replacement jig The sub-claw replacement jig of the present invention is used to attach and remove a plurality of sub claws from a plurality of parent claws at the same time. And a hollow disk portion (for example, a flange portion) integrated in the axially intermediate portion. The main body part is a part held by the operator, and the flange part is a part for holding a plurality of child claws. Here, the “child claws” are the child claws that are currently fastened and fixed to the parent claws and are removed from the parent claws by replacement (hereinafter referred to as “removable child claws” if necessary) and are newly removed. It includes both child claws (hereinafter referred to as “attachment claws” where necessary) that are fastened and fixed to the parent claws. The jig is movable in a direction approaching and separating from the parent nail, and is rotated about its axis.

フランジ部は各子爪の円弧溝に嵌合する横断面矩形状の環状部を持つことができ、環状部の円弧溝への嵌合により、治具に対して軸方向及び半径方向で子爪が位置決めされる。この位置決めは、子爪の親爪への取付け時に特に有効である。また、環状部の前面に立設された複数の子爪保持部(ピン)を有することができ、このピンが各子爪のピン孔に挿入される。   The flange portion can have an annular portion having a rectangular cross section that fits into the arc groove of each child claw. By fitting the annular portion into the arc groove, the child claw is axially and radially directed with respect to the jig. Is positioned. This positioning is particularly effective when the child claws are attached to the parent claws. Moreover, it can have the some nail | claw holding | maintenance part (pin) standingly arranged by the front surface of the cyclic | annular part, and this pin is inserted in the pin hole of each nail | claw.

更に、フランジ部を厚さ方向に貫通した工具挿入孔を持つことが望ましい。一つの親爪につき二本のねじ部材が螺合されている場合、工具挿通孔も二個形成し、そのピッチはねじ部材のピッチと等しくする。工具挿入孔から挿入した工具の先端を頭部の係合孔に係合させてねじ部材を回すことができる。   Furthermore, it is desirable to have a tool insertion hole that penetrates the flange portion in the thickness direction. When two screw members are screwed to one parent claw, two tool insertion holes are also formed, and the pitch is equal to the pitch of the screw members. The screw member can be turned by engaging the tip of the tool inserted from the tool insertion hole with the engagement hole of the head.

治具は、複数の取外し子爪の取外し時は、子爪保持部を複数の子爪の被保持部に挿入しねじ部材を緩めた後本体部の軸線の回りに回動され、複数の取外し子爪を同時に円弧方向に移動させる。ねじ部材の頭部が取外し子爪の大径孔に進入したとき軸方向に引かれ、取外し子爪を親爪から外す。これに対して、複数の取付け子爪の取付け時は、子爪保持部に複数の取付け子爪の被保持部を挿入して取付け子爪を保持し軸方向で親爪に接近し、本体部の軸線の回りに回動して複数の取付け子爪を同時に円弧方向に移動させる。ねじ部材の脚部が取付け子爪の小径孔に位置したとき、ねじ部材を締め付ける。   The jig is rotated around the axis of the main body after inserting the child claw holding part into the held part of the plurality of child claws and loosening the screw member when removing the plurality of removal child claws. The child claws are simultaneously moved in the arc direction. When the head of the screw member enters the large-diameter hole of the removal child claw, the screw member is pulled in the axial direction to remove the removal child claw from the parent claw. On the other hand, when attaching a plurality of attachment claws, insert the held portions of the plurality of attachment claws into the engagement claw holding portion to hold the attachment claws and approach the parent claw in the axial direction. And the plurality of attachment claws are simultaneously moved in the arc direction. When the leg portion of the screw member is positioned in the small diameter hole of the fitting claw, the screw member is tightened.

(ハ)子爪取付け方法
本発明の子爪取付け方法は、チャック本体に半径方向に変位可能に取り付けられねじ部材が螺合された複数の親爪に、複数の取付け子爪を一つの治具で同時に取り付ける方法であり、進入工程、移動工程、締付け工程及び外し工程等を備えている。進入工程で、子爪保持部で複数の取付け子爪を保持した治具を親爪に接近させ、ねじ部材の頭部を取付け子爪に形成された頭部よりも大きな大径孔に進入させる。取付け子爪の保持のためには例えばフランジ部の厚さ方向に立設したピンを取付け子爪に形成したピン孔に弾性的に挿入することができる。治具を親爪に接近させるときは、取付け子爪の大径孔の位置と親爪のねじ部材の頭部の位置とを一致させる。
(C) Method of attaching the child claws The method of attaching the child claws according to the present invention comprises attaching a plurality of attachment claws to a plurality of parent claws, which are attached to the chuck body so as to be displaceable in the radial direction and screw members are screwed together. At the same time, the method includes an entry process, a movement process, a tightening process, a removal process, and the like. In the entry step, the jig holding the plurality of attachment claws at the child claw holding part is brought close to the parent claw, and the head of the screw member is entered into a larger diameter hole than the head formed on the attachment claw. . In order to hold the attachment claw, for example, a pin standing in the thickness direction of the flange portion can be elastically inserted into a pin hole formed in the attachment claw. When the jig is brought close to the parent claw, the position of the large-diameter hole of the attachment claw and the position of the head of the screw member of the parent claw are matched.

移動工程で、治具をその軸線の回りに回動させて複数の取付け子爪を同時に円弧方向に移動させ、ねじ部材の脚部を各取付け子爪の頭部よりも小さく脚部よりも大きい小径孔内に位置決めする。移動工程は、治具の横断面矩形状の環状部を各取付け子爪の横断面矩形状の円弧溝に嵌合させる取付け子爪の位置決め工程を含むことができる。治具の環状部の外周面と各取付け子爪の外周係合部の内面との係合により治具に対して取付け子爪が半径方向で位置決めされ、環状部の端面と円弧溝の溝底面との係合により治具に対して取付け子爪が軸方向で位置決めされる。   In the moving process, the jig is rotated around its axis to move the plurality of attachment claws simultaneously in the arc direction, and the leg portions of the screw members are smaller than the head portions of the attachment claws and larger than the leg portions. Position in the small hole. The moving step may include a positioning step of the fitting claw for fitting the annular portion having a rectangular cross section of the jig into the circular arc groove having a rectangular cross section of each fitting claw. By engaging the outer peripheral surface of the annular portion of the jig with the inner surface of the outer peripheral engaging portion of each attachment claw, the attachment claw is positioned in the radial direction with respect to the jig, and the end surface of the annular portion and the groove bottom surface of the arc groove With the engagement, the attachment claw is positioned in the axial direction with respect to the jig.

締付け工程で、ねじ部材を工具で順次回転させて軸方向に前進させ、頭部の端面で取付け子爪の小径孔の縁部を親爪に締め付ける。治具のフランジ部を貫通して形成された工具挿通孔から挿入した工具の係合部をねじ部材の頭部の係合孔に係合させてねじ部材を回すことができる。なお、ねじ部材を締め付ける前に、治具で子爪を親爪に押し付け、軸方向及び半径方向で親爪に対して子爪を位置決めすることができる。ねじ部材の締付け後、治具を親爪から離間させ治具のピンを親爪に固定された子爪のピン爪から抜けば良い。   In the tightening step, the screw member is sequentially rotated with a tool to advance in the axial direction, and the edge of the small-diameter hole of the attachment pawl is tightened to the parent pawl at the end face of the head. The engagement portion of the tool inserted from the tool insertion hole formed through the flange portion of the jig can be engaged with the engagement hole of the head portion of the screw member, and the screw member can be rotated. Before tightening the screw member, the child claws can be pressed against the parent claws with a jig to position the child claws relative to the parent claws in the axial direction and the radial direction. After tightening the screw member, the jig may be separated from the parent claw and the pin of the jig may be removed from the pin claw of the child claw fixed to the parent claw.

(ニ)子爪取外し方法
子爪取外し方法では、上記子爪取付け方法と逆の手順を行なう。即ち、始めに挿入工程で治具の子爪保持部を複数の親爪に固定された複数の取外し子爪の被保持部に挿入し、開放工程で脚部が小径孔に位置しているねじ部材を緩める。移動工程で治具の回動により複数の取外し子爪を同時に移動させ、脚部を大径孔に進入させる。外し工程で治具を軸方向に引き、取外し子爪を親爪から取り外す。
(D) Child claw removal method In the child claw removal method, the reverse procedure of the above-described method of attaching the child claws is performed. That is, the screw whose jaws are held in the small-diameter holes in the opening process is first inserted in the holding parts of the plurality of removal child claws fixed to the plurality of parent claws in the insertion process. Loosen the member. In the moving process, the plurality of removal pawls are simultaneously moved by the rotation of the jig, and the leg portion enters the large-diameter hole. In the removal process, the jig is pulled in the axial direction, and the removal child claw is removed from the parent nail.

<実施形態>
以下、本発明の実施形態について図面を参照しつつ説明する。
<Embodiment>
Embodiments of the present invention will be described below with reference to the drawings.

(イ)チャック装置
図1及び図2に実施形態のチャック装置を示す。図1はチャック装置の縦断面図、図2は右側面図(但し治具60は図示省略)である。チャック本体10は全体として円筒形状を有しその軸線の回りに回転可能であり、外周寄りに内向案内面11を持ち、中心に中心孔13を持つ芯出リング14が配置されている。チャック本体10の軸方向一端(図1で右端)では、チャック本体10と芯出リング13との間に、円周方向に離れ軸方向及び半径方向に移動可能な三つの移動部材16が配置されている。移動部材16はチャック本体10の内向案内面11と係合する外向案内面17を持つ。移動部材16は軸方向で後退する(図1で左方に移動)につれて半径方向内向きに移動し、前進するにつれて半径方向外向きに移動する。
(A) Chuck Device FIGS. 1 and 2 show a chuck device according to an embodiment. 1 is a longitudinal sectional view of the chuck device, and FIG. 2 is a right side view (however, the jig 60 is not shown). The chuck main body 10 has a cylindrical shape as a whole and can rotate around its axis. A centering ring 14 having an inward guide surface 11 near the outer periphery and a center hole 13 at the center is disposed. At one end in the axial direction of the chuck body 10 (right end in FIG. 1), three moving members 16 are arranged between the chuck body 10 and the centering ring 13 so as to be separated in the circumferential direction and movable in the axial and radial directions. ing. The moving member 16 has an outward guide surface 17 that engages with the inward guide surface 11 of the chuck body 10. The moving member 16 moves inward in the radial direction as it moves backward in the axial direction (moves to the left in FIG. 1), and moves outward in the radial direction as it moves forward.

各移動部材16にボルト24で親爪20が取り付けられ、各親爪20に二本のボルト30で子爪40とが取り付けされている。図1及び図2、並びに図3及び図4に示すように、三つの親爪20は概ね扇形状の本体部21と、その外周側のフランジ部26とを含む。本体部21に雌ねじ孔22及び貫通孔23が形成され、貫通孔23を貫通したボルト24により上記移動部材16に取り付けられている。   A parent claw 20 is attached to each moving member 16 with a bolt 24, and a child claw 40 is attached to each parent claw 20 with two bolts 30. As shown in FIGS. 1 and 2, and FIGS. 3 and 4, the three parent claws 20 include a generally fan-shaped main body portion 21 and a flange portion 26 on the outer peripheral side thereof. A female screw hole 22 and a through hole 23 are formed in the main body 21, and are attached to the moving member 16 by a bolt 24 that penetrates the through hole 23.

対を成す三組(合計六本)の孔付きボルト30は同じ形状、寸法を持ち、脚部31とその一端の頭部34とを含む。脚部31に形成された雄ねじ32が親爪20の雌ねじ孔22に螺合され、頭部34に六角形の工具係合孔35が形成されている。頭部34の端面と親爪20の表面との間に所定のすきまがあり、このすきまに子爪40の小径孔47の縁部48が進入する。   The three pairs of bolts 30 (total of six) having the same shape and dimensions have a pair of legs 31 and a head 34 at one end thereof. A male screw 32 formed in the leg portion 31 is screwed into the female screw hole 22 of the parent claw 20, and a hexagonal tool engagement hole 35 is formed in the head portion 34. There is a predetermined gap between the end face of the head 34 and the surface of the parent claw 20, and the edge 48 of the small diameter hole 47 of the child claw 40 enters this gap.

図4及び図5に示すように、三つの子爪40は何れも扇形状を持ち、半径方向中間部に形成された横断面矩形状の円弧溝41の底部に一対のだるま孔43が円弧方向に離れて形成されている。二つのだるま孔43は同じ形状を持ち、円弧方向一端(右端)の大径部44と、大径孔44に連続して形成された円弧方向他端の小径孔47とを含む。大径孔44の内径は上記ボルト30の頭部34の外径よりも少し大きい。小径孔47の内径はボルト30の頭部34の外径よりも小さく、脚部31の外径よりも大きい。小径孔47の両側は段付き縁部48となっている。隣接するだるま孔43間に、半径方向に細長い段付きのピン孔51が形成されている。ボルト30の脚部31は小径孔47内に位置し、頭部34の端面が縁部28を親爪20に向かって押し付けている。   As shown in FIGS. 4 and 5, each of the three child claws 40 has a fan shape, and a pair of dart holes 43 are formed in the arc direction at the bottom of an arc groove 41 having a rectangular cross section formed in the middle portion in the radial direction. Are formed apart. The two daruma holes 43 have the same shape and include a large-diameter portion 44 at one end (right end) in the arc direction and a small-diameter hole 47 at the other end in the arc direction formed continuously to the large-diameter hole 44. The inner diameter of the large diameter hole 44 is slightly larger than the outer diameter of the head 34 of the bolt 30. The inner diameter of the small diameter hole 47 is smaller than the outer diameter of the head portion 34 of the bolt 30 and larger than the outer diameter of the leg portion 31. Both sides of the small diameter hole 47 are stepped edges 48. A stepped pin hole 51 that is elongated in the radial direction is formed between adjacent daruma holes 43. The leg portion 31 of the bolt 30 is located in the small diameter hole 47, and the end face of the head portion 34 presses the edge portion 28 toward the parent nail 20.

子爪40の内周に円弧形状のワーク把持部53が形成され、小径孔47からワーク保持部53の内周面までの距離は所定長さとなっている。外周に円弧形状の位置決め用案内部55が形成され、その曲率は上記親爪20のフランジ部26の曲率と一致している。   An arc-shaped workpiece gripping portion 53 is formed on the inner periphery of the child claw 40, and the distance from the small diameter hole 47 to the inner peripheral surface of the workpiece holding portion 53 is a predetermined length. An arc-shaped positioning guide portion 55 is formed on the outer periphery, and the curvature thereof coincides with the curvature of the flange portion 26 of the parent claw 20.

(子爪交換用治具)
次に、子爪40の交換に使用する治具につき説明する。図1、図6及び図7に示すように、治具60は丸棒状の本体部62とフランジ部71とを含む。本体部62は一端側の太径部63と、他端側の細経部65とが形成されている。図6に示すように、フランジ部71は中空円板形状を持ち、その一面に形成された円形のくぼみ72により中心の円板部73と、その周囲の環状部77とが区画されている。円板部73の中心孔74に本体部62が挿入され、ボルト75で結合されている。
(Claw replacement jig)
Next, a jig used for replacing the child claws 40 will be described. As shown in FIGS. 1, 6, and 7, the jig 60 includes a round bar-shaped main body portion 62 and a flange portion 71. The main body 62 is formed with a large-diameter portion 63 on one end side and a meridian portion 65 on the other end side. As shown in FIG. 6, the flange portion 71 has a hollow disc shape, and a central disc portion 73 and a surrounding annular portion 77 are partitioned by a circular recess 72 formed on one surface thereof. The main body portion 62 is inserted into the center hole 74 of the disc portion 73 and is coupled by a bolt 75.

横断面矩形状の環状部77の寸法や曲率は基本的に上記子爪40の円弧溝41のそれらに対応しているので、上記円弧溝41内に環状部77が進入可能である。但し、正確には円弧溝41の半径方向寸法は環状部77の半径方向寸法よりも少し大きく選定され、従ってこのすきまΔr(図8参照)の分、子爪40は治具60に対して半径方向に微動可能である。   Since the dimension and curvature of the annular portion 77 having a rectangular cross section basically correspond to those of the arc groove 41 of the child claw 40, the annular portion 77 can enter the arc groove 41. However, to be exact, the radial dimension of the arc groove 41 is selected to be slightly larger than the radial dimension of the annular portion 77. Accordingly, the child claw 40 has a radius relative to the jig 60 by the amount of the clearance Δr (see FIG. 8). Can be finely moved in the direction.

環状部77に三組の孔群が円周方向に離れて形成されている。各孔群は一対の工具挿通孔78と、両方の工具挿通孔78間の一つの段付き孔79とを含む。一対の工具挿通孔78間のピッチは親爪20に螺合されたボルト30のピッチと等しい。段付き孔79にピン81が挿入されボルト83で固定され、ピン81にリング形の弾性部材82が取り付けられている。段付き孔79と工具挿通孔78との距離は、子爪40のピン孔51と小径孔47との間隔と等しい。環状部77を貫通する工具挿通孔78は後述する工具90の外径よりも少し太くなっている。   Three groups of holes are formed in the annular portion 77 so as to be separated in the circumferential direction. Each hole group includes a pair of tool insertion holes 78 and a stepped hole 79 between both tool insertion holes 78. The pitch between the pair of tool insertion holes 78 is equal to the pitch of the bolts 30 screwed into the parent claw 20. A pin 81 is inserted into the stepped hole 79 and fixed with a bolt 83, and a ring-shaped elastic member 82 is attached to the pin 81. The distance between the stepped hole 79 and the tool insertion hole 78 is equal to the distance between the pin hole 51 and the small diameter hole 47 of the child claw 40. A tool insertion hole 78 that penetrates the annular portion 77 is slightly thicker than an outer diameter of a tool 90 described later.

(子爪取付け方法)
(イ)現在の子爪の取り外し
子爪の交換時は、まず現在取り付けられている子爪(取外し子爪)40を親爪20から取り外し、その後新しい子爪40Aを親爪20に取り付ける。図3及び図4は、現在の現在の子爪40が取り付けられた状態を示す。ボルト30の脚部31が子爪40の小径孔47内に位置し、頭部34の端面が小径孔47の縁部48を親爪20に向かって押し付けている。
(How to attach the claw)
(A) Removal of current child claws When replacing the child claws, the currently attached child claws (detached child claws) 40 are first removed from the parent claws 20, and then new child claws 40 </ b> A are attached to the parent claws 20. 3 and 4 show a state in which the current child claws 40 are attached. The leg portion 31 of the bolt 30 is located in the small diameter hole 47 of the child claw 40, and the end surface of the head portion 34 presses the edge 48 of the small diameter hole 47 toward the parent claw 20.

始めに、ピン81の位置をピン孔51の位置に一致させて治具60を子爪40に接近させて、各弾性部材82を各子爪40のピン孔51に挿入する。次に、親爪20を半径方向内向きに移動させて子爪40を同方向に移動させ、治具60に対して子爪40を位置決めする。治具60の工具挿通孔78から工具90を挿入し頭部34の係合孔35に係合させてボルト30を緩める。この工具90は横断面六角形状の線材をL字形状に屈曲させて成り挿入部91と操作部93を含み、挿入部91は工具挿通孔78に挿通され、その先端の係合部がボルト30の頭部34の六角孔35に係合される。操作部93はフランジ部81の手前側(図3で右側)に位置し、作業者により操作される。   First, the position of the pin 81 is matched with the position of the pin hole 51, the jig 60 is brought close to the child claw 40, and each elastic member 82 is inserted into the pin hole 51 of each child claw 40. Next, the parent claw 20 is moved inward in the radial direction, the child claw 40 is moved in the same direction, and the child claw 40 is positioned with respect to the jig 60. The tool 90 is inserted from the tool insertion hole 78 of the jig 60 and engaged with the engagement hole 35 of the head 34 to loosen the bolt 30. This tool 90 is formed by bending a wire rod having a hexagonal cross section into an L shape, and includes an insertion portion 91 and an operation portion 93. The insertion portion 91 is inserted into the tool insertion hole 78, and the engagement portion at the tip thereof is the bolt 30. Is engaged with the hexagonal hole 35 of the head 34 of the head. The operation part 93 is located on the front side (right side in FIG. 3) of the flange part 81 and is operated by an operator.

治具60を回動させると、弾性部材82とピン孔51との係合を介して各子爪40が円弧方向で一方向(図4で反時計方向)に移動される。その結果、ボルト30の脚部31が大径孔44に位置し、頭部34が大径孔44に進入可能となる。親爪20を半径方向外向きに移動させ、子爪40の円弧溝41と治具60の環状部77との密着を開放する。治具60を軸方向に引くと、弾性部材82に保持され子爪40が親爪20から取り外される。ピン孔51からピン81を抜き子爪40を治具60から外す。   When the jig 60 is rotated, each child claw 40 is moved in one direction in the arc direction (counterclockwise in FIG. 4) through the engagement between the elastic member 82 and the pin hole 51. As a result, the leg portion 31 of the bolt 30 is positioned in the large diameter hole 44 and the head portion 34 can enter the large diameter hole 44. The parent claw 20 is moved outward in the radial direction, and the close contact between the arc groove 41 of the child claw 40 and the annular portion 77 of the jig 60 is released. When the jig 60 is pulled in the axial direction, the child claw 40 is removed from the parent claw 20 while being held by the elastic member 82. The pin 81 is removed from the pin hole 51 and the child claw 40 is removed from the jig 60.

(ロ)新しい子爪の取付け
次に、上記治具60を利用して新しい三つの小爪(取付け子爪)40Aを親爪20に取り付ける。子爪40Aは上記子爪40と比べて、小径孔47からワーク把持部53の内周面までの距離が異なる。図8に示すように、治具60の環状部77に新しい三つの子爪40Aの円弧溝41を嵌め、治具60の弾性部材82を子爪40Aのそれぞれのピン孔51に挿入する。子爪40Aを保持した治具60の本体部62を手で持って親爪20に接近させる。その際、治具60の細経部65を芯出しリング13の中心孔14に挿入し、これにより親爪20に対する治具60の相対位置が決まる。
(B) Attaching a new child claw Next, using the jig 60, three new small claws (attachment claw) 40A are attached to the parent claw 20. The child claws 40 </ b> A differ from the child claws 40 in the distance from the small-diameter hole 47 to the inner peripheral surface of the work gripping portion 53. As shown in FIG. 8, the arc grooves 41 of the new three child claws 40A are fitted into the annular portion 77 of the jig 60, and the elastic members 82 of the jig 60 are inserted into the respective pin holes 51 of the child claws 40A. The main body 62 of the jig 60 holding the child claws 40 </ b> A is held by hand and brought close to the parent claws 20. At that time, the warp portion 65 of the jig 60 is inserted into the center hole 14 of the centering ring 13, whereby the relative position of the jig 60 with respect to the parent claw 20 is determined.

円周方向で、子爪40Aの大径孔44の位置を親爪20に螺合されたボルト30の位置に一致させる。子爪40Aの外周の位置決め用案内部55を親爪20のフランジ部26に沿わせつつ接近させ、図9に示すように、ボルト30の頭部34が子爪40Aの大径孔44内に進入させる。治具60により子爪40Aを親爪20に押し付けると、子爪40Aの一面が親爪20の本体部21の一面に押圧される。   In the circumferential direction, the position of the large-diameter hole 44 of the child claw 40A is matched with the position of the bolt 30 screwed into the parent claw 20. As shown in FIG. 9, the positioning guide portion 55 on the outer periphery of the child claw 40A approaches the flange portion 26 of the parent claw 20, and the head portion 34 of the bolt 30 enters the large diameter hole 44 of the child claw 40A. Let it enter. When the child claw 40A is pressed against the parent claw 20 by the jig 60, one surface of the child claw 40A is pressed against one surface of the main body portion 21 of the parent claw 20.

次に、治具60をその軸線の回りに所定角度回動させる。すると、ピン孔51とピン81及び弾性部材82との係合を介して三つの子爪40が同時にその円弧方向即ち親爪20の円弧方向に移動され、ボルト30の脚部31が小径孔47内に位置決めされる(前記図4参照)。このとき、小径孔47の両側の縁部48は段付きとされているので、頭部34が縁部48上を移動できる。治具60の回動即ち子爪40Aの移動は、脚部31の小径孔47の端縁への当接で終了する。   Next, the jig 60 is rotated around the axis by a predetermined angle. Then, the three child claws 40 are simultaneously moved in the arc direction, that is, the arc direction of the parent claw 20 through the engagement of the pin hole 51 with the pin 81 and the elastic member 82, and the leg portion 31 of the bolt 30 is moved to the small diameter hole 47. (See FIG. 4). At this time, since the edge portions 48 on both sides of the small diameter hole 47 are stepped, the head portion 34 can move on the edge portion 48. The rotation of the jig 60, that is, the movement of the child claw 40 </ b> A is completed by abutting the end of the small-diameter hole 47 of the leg 31.

親爪20を半径方向内向きに変位させると、ボルト30の脚部31と小径孔47との係合を介して子爪40Aも同方向に変位する。ここで、治具60の弾性部材82が挿入される子爪40Aのピン孔51は半径方向に長く、また円弧溝41の半径方向寸法は環状部77の半径方向よりもΔrだけ大きいので、子爪40Aは半径方向に微動可能である。その結果、子爪40Aを半径方向内向きに移動させると、その円弧溝41の内向案内面41aが治具60の環状部77の外周面77aに密着し、治具60に対して子爪40Aが半径方向で位置決めされ、三つの子爪40Aの芯出しが達成される。また、各子爪40Aの円弧溝41の底面41bが治具60の環状部77の端面77bに当接されるので、治具60に対して子爪40Aが軸方向で位置決めされる。   When the parent claw 20 is displaced inward in the radial direction, the child claw 40A is also displaced in the same direction through the engagement between the leg 31 of the bolt 30 and the small diameter hole 47. Here, the pin hole 51 of the child claw 40A into which the elastic member 82 of the jig 60 is inserted is long in the radial direction, and the radial dimension of the arc groove 41 is larger by Δr than the radial direction of the annular portion 77. The claw 40A can be finely moved in the radial direction. As a result, when the child claw 40A is moved inward in the radial direction, the inward guide surface 41a of the arc groove 41 comes into close contact with the outer peripheral surface 77a of the annular portion 77 of the jig 60, and the child claw 40A is in contact with the jig 60. Are positioned in the radial direction, and the centering of the three child claws 40A is achieved. Further, since the bottom surface 41 b of the circular arc groove 41 of each child claw 40 </ b> A is in contact with the end surface 77 b of the annular portion 77 of the jig 60, the child claw 40 </ b> A is positioned in the axial direction with respect to the jig 60.

次に、治具60のフランジ部71の工具挿入孔78から工具90(図3参照)を挿入し、ボルト30を締めると、ボルト30が前進しその頭部34の端面が子爪40Aの小径孔47の縁部48を親爪20に向かって締め付ける。こうして、各子爪40Aが二本のボルト30で各親爪20に締付け固定される。   Next, when a tool 90 (see FIG. 3) is inserted from the tool insertion hole 78 of the flange portion 71 of the jig 60 and the bolt 30 is tightened, the bolt 30 advances and the end surface of the head 34 has a small diameter of the child claw 40A. The edge 48 of the hole 47 is tightened toward the parent nail 20. Thus, each child claw 40 </ b> A is fastened and fixed to each parent claw 20 with the two bolts 30.

親爪20を半径方向外向きに変位させると、ボルト30と小径孔47との係合を介して子爪40Aも同方向に変位する。その結果、各子爪40Aの円弧溝41の内向円弧面41aと治具60の環状部77の外周面77aとの密着が開放される。従って、治具60の本体部62を軸方向に引くと、図10に示すように、治具60の弾性部材82が子爪40Aのピン孔51から抜け、治具60が子爪40Aから外される。各子爪40Aは各親爪20に対してボルト30により所定状態で固定されている。   When the parent claw 20 is displaced outward in the radial direction, the child claw 40 </ b> A is also displaced in the same direction through the engagement between the bolt 30 and the small diameter hole 47. As a result, the close contact between the inward arc surface 41a of the arc groove 41 of each child claw 40A and the outer peripheral surface 77a of the annular portion 77 of the jig 60 is released. Therefore, when the main body 62 of the jig 60 is pulled in the axial direction, as shown in FIG. 10, the elastic member 82 of the jig 60 comes out of the pin hole 51 of the child claw 40A, and the jig 60 is removed from the child claw 40A. Is done. Each child claw 40A is fixed to each parent claw 20 by a bolt 30 in a predetermined state.

(作用)
三つの子爪40Aのワーク把持部53で区画される空間にワーク(不図示)の一部を挿入し、三つの親爪20を半径方向内向きに変位させ、三つの子爪40Aのワーク把持部53でワークWを三方向から把持する。チャック本体10を回転させつつワークにバイト等を接近させ、半径方向及び軸方向に移動させてワークを加工する。
(Function)
A part of a work (not shown) is inserted into a space defined by the work gripping portions 53 of the three child claws 40A, and the three parent claws 20 are displaced inward in the radial direction to grip the work of the three child claws 40A. The part 53 grips the workpiece W from three directions. While rotating the chuck body 10, a tool or the like is brought close to the work and moved in the radial direction and the axial direction to process the work.

(効果)
この実施形態によれば、以下の効果が得られる。第1に、三つの子爪40及び三つの小爪40Aのそれぞれが二本のボルト30により三つの親爪20のそれぞれに容易に取り付けられる。子爪40及び40Aの交換時にボルト30を外さないで済むからである。例えば、子爪40の取外し時は、治具60のピン81を子爪40のピン孔51に挿入し、工具90でボルト30を緩め、治具60で各子爪40を移動させて大径孔44に頭部34を進入させ、治具60を引くだけで良い。
(effect)
According to this embodiment, the following effects can be obtained. First, each of the three child claws 40 and the three small claws 40 </ b> A is easily attached to each of the three parent claws 20 by the two bolts 30. This is because it is not necessary to remove the bolt 30 when replacing the child claws 40 and 40A. For example, when removing the child claws 40, the pins 81 of the jig 60 are inserted into the pin holes 51 of the child claws 40, the bolts 30 are loosened with the tool 90, and the child claws 40 are moved with the jig 60 to increase the diameter. It is only necessary to allow the head 34 to enter the hole 44 and pull the jig 60.

また、子爪40Aの取付け時は治具60で保持した子爪40Aの大径孔44に頭部34を進入させ、治具60で各子爪40Aを移動させて小径孔47に脚部31を位置決めした後、ボルト30を締めるだけで良い。従って、子爪の交換時に従来のようにボルトを着脱する場合に比べて、子爪の交換が容易になる。   Further, when attaching the child claws 40A, the head 34 is inserted into the large-diameter hole 44 of the child claws 40A held by the jig 60, and each child claw 40A is moved by the jig 60 to move the leg 31 to the small-diameter hole 47. After positioning, the bolts 30 need only be tightened. Therefore, it is easier to replace the child claws than when the bolts are attached and detached as in the prior art when replacing the child claws.

第2に、三つの子爪40及び40Aを一つの治具60で三つの親爪20に対して同時に取り外し及び取り付けることができる。例えば子爪40の取外し時は、一つの治具60の三本のピン81を三つの子爪40のピン孔51に挿入し、ボルト30を緩め、治具60を回動させて三つの子爪40を同時に移動させ、治具60を引けば、三つの子爪40が治具60に付いてくる。   Secondly, the three child claws 40 and 40A can be simultaneously removed and attached to the three parent claws 20 with one jig 60. For example, when removing the child claws 40, the three pins 81 of one jig 60 are inserted into the pin holes 51 of the three child claws 40, the bolts 30 are loosened, and the jig 60 is rotated to move the three pieces. When the claws 40 are moved simultaneously and the jig 60 is pulled, the three child claws 40 are attached to the jig 60.

また、子爪40Aの取付け時は、一つの治具60で保持した三つの子爪40Aの大径孔44に親爪20に螺合されたボルト30の頭部34を進入させ、三つの子爪40Aを一つの治具60で同時に円弧方向に移動させることができる。その結果、従来のように三つの子爪を一つづつ交換する場合に比べて、子爪の交換が簡単かつ容易になる。   When attaching the child claws 40A, the heads 34 of the bolts 30 screwed into the parent claws 20 are inserted into the large-diameter holes 44 of the three child claws 40A held by one jig 60, and the three child claws 40A are inserted. The claw 40A can be simultaneously moved in the arc direction by one jig 60. As a result, it is easier and easier to replace the child claws than when the three child claws are replaced one by one as in the prior art.

その他にも子爪40Aの取付けに関し、以下の効果のような種々の効果が得られる。まず、各親爪20に二本のボルト30を螺合し、子爪40Aに二つのだるま孔43を形成したので、二本のボルト30により親爪20に対する子爪40Aの位置は一義的に決まる。   In addition, various effects such as the following effects can be obtained with respect to the attachment of the child claws 40A. First, since the two bolts 30 are screwed into each parent claw 20 and the two daruma holes 43 are formed in the child claw 40A, the position of the child claw 40A relative to the parent claw 20 is uniquely determined by the two bolts 30. Determined.

また、中心孔14への細径部65の挿入により芯出しリング13に対して治具60が位置決めされ、しかも各子爪40Aの円弧溝41の内向案内面41aが治具60の環状部77の外周面77aに密着するので、治具60の半径方向で親爪20に対する小爪40Aの芯出し状態が実現できる。   Further, the jig 60 is positioned with respect to the centering ring 13 by inserting the small-diameter portion 65 into the center hole 14, and the inward guide surface 41 a of the arc groove 41 of each child claw 40 </ b> A is an annular portion 77 of the jig 60. Because of the close contact with the outer peripheral surface 77a, the centering state of the small claw 40A with respect to the parent claw 20 in the radial direction of the jig 60 can be realized.

更に、環状部77と円弧溝41との間には半径方向のすきまΔrがあるので、環状部77の円弧溝41への進入はスムーズで、しかも治具60の子爪40Aからの抜出しもスムーズに行うことができる。また、脚部31が小径孔47内にある状態で工具90によりボルト30を締める際、治具60により各子爪40Aを各親爪20の案内部27に押圧するので、親爪20に対して子爪40Aが軸方向及び半径方向で位置決めされ、ずれ難い。   Further, since there is a radial clearance Δr between the annular portion 77 and the arc groove 41, the annular portion 77 can smoothly enter the arc groove 41, and the jig 60 can be smoothly pulled out from the child claws 40A. Can be done. Further, when the bolt 30 is tightened with the tool 90 in a state where the leg portion 31 is in the small-diameter hole 47, each child claw 40A is pressed against the guide portion 27 of each parent claw 20 by the jig 60. The lever claw 40A is positioned in the axial direction and the radial direction and is not easily displaced.

最良の形態の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows embodiment of the best form. 実施形態の右端面図である(但し、治具60は図示省略している)。It is a right end view of the embodiment (however, the jig 60 is not shown). 図1の要部模式図である。It is a principal part schematic diagram of FIG. 図2の要部模式図である。It is a principal part schematic diagram of FIG. 実施形態の子爪を示し、(a)は正面図、(b)は(a)の5b−5b断面図、(c)は(a)の5c−5c断面図である。The child claw of an embodiment is shown, (a) is a front view, (b) is a 5b-5b sectional view of (a), and (c) is a 5c-5c sectional view of (a). 実施形態の治具を示し、(a)は縦断面図、(b)は右端面図である。The jig | tool of embodiment is shown, (a) is a longitudinal cross-sectional view, (b) is a right end view. 図6の治具のフランジ部を示し、(a)は縦断面図、(b)は右端面図である。The flange part of the jig | tool of FIG. 6 is shown, (a) is a longitudinal cross-sectional view, (b) is a right end view. 実施形態の作動説明図である。It is operation | movement explanatory drawing of embodiment. 実施形態の作動説明図である。It is operation | movement explanatory drawing of embodiment. 実施形態の作動説明図である。It is operation | movement explanatory drawing of embodiment.

符号の説明Explanation of symbols

10:チャック本体 20:親爪
21:本体部 26:フランジ部
30:ねじ部材(ボルト) 31:脚部
34:頭部 35:係合孔
40,40A:子爪 41:円弧溝
43:だるま孔 44:大径孔
47:小径孔 48:縁部
51:ピン孔 53:ワーク把持部
60:治具 71;フランジ部
77;環状部 81:ピン
82:弾性部材
10: Chuck body 20: Parent claw 21: Main body part 26: Flange part 30: Screw member (bolt) 31: Leg part 34: Head part 35: Engagement hole 40, 40A: Child claw 41: Arc groove 43: Daruma hole 44: Large-diameter hole 47: Small-diameter hole 48: Edge 51: Pin hole 53: Work gripping part 60: Jig 71; Flange part 77; Ring part 81: Pin 82: Elastic member

Claims (13)

チャック本体(10)に半径方向に変位可能に装着された複数の親爪(20)と、
複数の前記親爪に螺合された複数のねじ部材(30)と、
前記ねじ部材の前記頭部よりも大きな大径孔及び該頭部よりも小さく前記ねじ部材の脚部よりも大きい小径孔(47)が連続して形成された複数の子爪(40)と、を備え、
各前記親爪に対する各前記子爪の取外し時及び取付け時は、前記ねじ部材を前記親爪から外すことなく前記子爪の前記大径孔に各前記ねじ部材の前記頭部を進入させ、
各前記親爪への各前記子爪の締付け固定時は、前記子爪の小径部に前記ねじ部材の脚部を位置させ前記頭部で前記小径孔の縁部(48)を前記親爪に締め付ける、
ことを特徴とするチャック装置。
A plurality of parent claws (20) attached to the chuck body (10) in a radially displaceable manner;
A plurality of screw members (30) screwed into the plurality of parent claws;
A plurality of child claws (40) in which a large-diameter hole larger than the head portion of the screw member and a small-diameter hole (47) smaller than the head portion and larger than the leg portion of the screw member are continuously formed; With
When removing and attaching each child claw to each parent claw, the head of each screw member enters the large-diameter hole of the child claw without removing the screw member from the parent claw,
When fastening each of the child claws to each of the parent claws, the leg portion of the screw member is positioned at the small diameter portion of the child claws, and the edge (48) of the small diameter hole is formed on the parent nail at the head. tighten,
A chuck device characterized by that.
前記子爪の前記大径孔及び前記小径孔は該子爪の円弧方向に連続して形成されただるま孔(43)から成ることを特徴とする請求項1に記載のチャック装置。   2. The chuck device according to claim 1, wherein the large-diameter hole and the small-diameter hole of the child claw are formed by a saddle hole (43) formed continuously in the arc direction of the child claw. 各前記親爪に2本の前記ねじ部材が螺合され、各前記子爪に二つの前記だるま孔が円弧方向に離れて形成されていることを特徴とする請求項2に記載のチャック装置。   The chuck device according to claim 2, wherein two screw members are screwed to each of the parent claws, and the two dart holes are formed in each child claw so as to be separated in an arc direction. チャック本体(10)に半径方向に変位可能に装着されねじ部材(30)が螺合された複数の親爪(20)に対して、前記ねじ部材の頭部よりも大きな大径孔(44)、該大径孔に連続し前記頭部よりも小さく前記ねじ部材の脚部よりも大きい小径孔(47)、及び被保持部(51)が形成された複数の子爪(40)を同時に取り外し及び取り付けるために使用される子爪交換用治具(60)であって、
棒状の本体部(62)と、該本体部と一体化された中空円板部(71)とを備え、該中空円板部は前記ねじ部材で複数の前記親爪に締め付けられている複数の前記子爪の被保持部、及び複数の前記親爪に取り付けられる複数の前記子爪の被保持部に挿入される子爪把持部(81)が形成され、軸線の回りに回動可能であり、
複数の前記子爪の取外し時は、前記治具の前記子爪保持部を複数の前記子爪の被保持部に挿入し前記ねじ部材を緩めた後前記治具を軸線の回りに回動させ複数の前記子爪を円弧方向に移動させ、前記頭部が前記大径孔に進入したとき前記治具を軸方向に移動させて前記子爪を前記親爪から外し、
複数の前記子爪の取付け時は、前記治具の前記子爪保持部に複数の前記子爪の被保持部を挿入し前記治具を軸方向に移動させ、軸線の回りに回動させて複数の前記子爪を円弧方向に移動させ、前記脚部が前記小径孔に位置したとき前記ねじ部材を締め付けることを特徴とする子爪交換用治具。
A large-diameter hole (44) larger than the head of the screw member with respect to the plurality of parent claws (20) to which the screw member (30) is screwed and mounted on the chuck body (10) in a radially displaceable manner. A plurality of child claws (40) in which a small-diameter hole (47) that is continuous with the large-diameter hole and is smaller than the head and larger than the leg portion of the screw member and a held portion (51) are simultaneously removed. And a child claw replacement jig (60) used for mounting,
A rod-shaped main body part (62) and a hollow disk part (71) integrated with the main body part, the hollow disk part being fastened to the plurality of parent claws by the screw member A child claw gripping portion (81) to be inserted into the child claw held portion and a plurality of child claw held portions attached to the plurality of parent claws is formed and is rotatable around an axis. ,
When removing the plurality of child claws, after inserting the child claw holding portions of the jig into the held portions of the plurality of child claws and loosening the screw members, the jig is rotated around the axis. Moving the plurality of child claws in an arc direction, and moving the jig in the axial direction when the head enters the large-diameter hole to remove the child claws from the parent claws;
When attaching the plurality of child claws, insert the plurality of child claw holding portions into the child claw holding portion of the jig, move the jig in the axial direction, and rotate it around the axis. A child claw replacement jig characterized in that a plurality of child claws are moved in an arc direction and the screw member is tightened when the leg portion is positioned in the small diameter hole.
前記子爪保持部は前記中空円板部の一面に立設されたピン(81)から成り、前記被保持部は前記子爪に形成されたピン孔(51)から成ることを特徴とする請求項4に記載の子爪交換用治具。   The said nail | claw holding | maintenance part consists of a pin (81) standingly arranged in one surface of the said hollow disc part, The said to-be-held part consists of a pin hole (51) formed in the said nail | claw. Item 4. The nail replacement jig according to Item 4. 更に、複数の前記子爪の取付け時、前記治具の半径方向及び軸方向で複数の前記子爪を位置決めする位置決め部を有することを特徴とする請求項4に記載の子爪交換用治具。   The jig for replacing a nail according to claim 4, further comprising a positioning portion for positioning the plurality of nail in the radial direction and the axial direction of the jig when the plurality of the nail are attached. . 前記位置決め部は、前記中空円板部の外周に形成され各前記子爪に形成された円弧溝(41)に嵌入される環状部(77)から成ることを特徴とする請求項6に記載の子爪交換用治具。   The said positioning part consists of a cyclic | annular part (77) inserted in the circular arc groove (41) formed in the outer periphery of the said hollow disc part, and each said claw. Claw replacement jig. 前記中空円板部はその厚さ方向に貫通する工具挿入孔(78)が形成され、前記中空円板部の他面から前記工具挿入孔に挿入した工具(90)で前記ねじ部材を回転させることを特徴とする請求項4に記載の子爪交換用治具。   The hollow disc portion is formed with a tool insertion hole (78) penetrating in the thickness direction, and the screw member is rotated by a tool (90) inserted into the tool insertion hole from the other surface of the hollow disc portion. The jig | tool for a child nail | claw replacement | exchange of Claim 4 characterized by the above-mentioned. チャック本体(10)に半径方向に変位可能に取り付けられねじ部材(30)が螺合された複数の親爪(20)に、一つの治具(60)で複数の子爪(40A)を同時に取り付ける方法であって、
前記治具の子爪保持部(81)で複数の前記子爪を保持し前記親爪に接近させ、前記ねじ部材の頭部を前記子爪に形成され該ねじ部材の頭部よりも大きな大径孔(44)に進入させる進入工程と、
前記治具を軸線の回りに回動させ複数の前記子爪を円弧方向に移動させ、前記ねじ部材の前記脚部を前記頭部よりも小さく該脚部よりも大きい小径孔(47)内に位置させる移動工程と、
前記ねじ部材を締め、前記子爪の前記小径孔の縁部(48)を前記ねじ部材の前記頭部で前記親爪に締め付ける締付け工程と、
複数の前記親爪に締め付けられた複数の前記子爪から前記治具を抜く抜き工程と、
を備えたことを特徴とする子爪取付け方法。
A plurality of child claws (40A) are simultaneously attached to a plurality of parent claws (20), which are attached to the chuck body (10) in a radially displaceable manner and screw members (30) are screwed together, with a single jig (60). A method of attaching,
A plurality of child claws are held by the child claw holding portion (81) of the jig and brought close to the parent claw, and the head of the screw member is formed on the child claw and is larger than the head of the screw member. An entry step for entering the diameter hole (44);
The jig is rotated around an axis to move the plurality of child claws in an arc direction, and the leg portion of the screw member is placed in a small-diameter hole (47) which is smaller than the head and larger than the leg portion. A moving process to position;
A tightening step of tightening the screw member and tightening the edge (48) of the small-diameter hole of the child claw to the parent claw with the head of the screw member;
A step of removing the jig from the plurality of child claws fastened to the plurality of parent claws;
A claw attachment method characterized by comprising:
前記進入工程において、前記治具に立設した複数のピン(81)を各前記子爪に形成したピン孔(51)に挿入し、前記治具で前記子爪を保持することを特徴とする請求項9に記載の子爪取付け方法。   In the entering step, a plurality of pins (81) erected on the jig are inserted into pin holes (51) formed in the child claws, and the child claws are held by the jig. The method for attaching the child claws according to claim 9. 前記移動工程は、前記治具に形成された環状部(77)を各前記子爪に形成された円弧溝(41)に嵌合させ、前記子爪を前記治具に対して半径方向及び軸方向で位置決めする位置決め工程を含むことを特徴とする請求項9に記載の子爪取付け方法。   In the moving step, the annular portion (77) formed in the jig is fitted into the arc groove (41) formed in each of the child claws, and the child claws are arranged in the radial direction and the axis with respect to the jig. The method of attaching a child claw according to claim 9, comprising a positioning step of positioning in a direction. 前記締付け工程において、前記治具で各前記子爪を各前記親爪に押し付け、前記治具に形成された工具挿通孔(78)に挿通した工具(90)を前記頭部に係合させて前記ねじ部材を締めることを特徴とする請求項9に記載の子爪取付け方法。   In the tightening step, each of the child claws is pressed against each of the parent claws with the jig, and a tool (90) inserted through a tool insertion hole (78) formed in the jig is engaged with the head. The method of claim 9, wherein the screw member is tightened. チャック本体(10)に半径方向に変位可能に取り付けられた複数の親爪に複数のねじ部材(30)が螺合され、該ねじ部材(30)により前記親爪に締付けられ前記ねじ部材の頭部よりも大きい大径孔(44)、該大径孔に連続し前記頭部よりも小さく前記ねじ部材の脚部よりも大きい小径孔(47)及び被保持部が形成された複数の子爪(40)を、前記被保持部に挿入される保持部を有する一つの治具(60)で複数の前記親爪から同時に取り外す方法であって、
前記治具の前記子爪保持部を複数の前記子爪の前記被保持部に挿入する挿入工程と、
前記脚部が前記小径孔(47)に位置している前記ねじ部材を緩め、前記頭部による各前記子爪の前記小径孔の縁部(48)の締付けを開放する開放工程と、
前記治具を軸線の回りに回動させて複数の前記子爪を円弧方向に移動させ、前記ねじ部材の前記頭部を前記大径孔(44)に進入させる移動工程と、
前記治具を前記親爪から離間させ、複数の前記子爪を複数の親爪部から外す外し工程と、
を備えたことを特徴とする子爪取外し方法。
A plurality of screw members (30) are screwed to a plurality of parent claws attached to the chuck body (10) so as to be displaceable in the radial direction, and are fastened to the parent claws by the screw members (30). A large-diameter hole (44) that is larger than the portion, a small-diameter hole (47) that is continuous with the large-diameter hole and that is smaller than the head and larger than the leg portion of the screw member, and a plurality of child claws in which a held portion is formed (40) is a method of simultaneously removing from a plurality of the parent claws with one jig (60) having a holding portion inserted into the held portion,
An insertion step of inserting the child claws holding portion of the jig into the held portions of the plurality of child claws;
An opening step in which the leg portion loosens the screw member positioned in the small-diameter hole (47) and releases the tightening of the edge (48) of the small-diameter hole of each child claw by the head;
Moving the jig around the axis to move the plurality of child claws in the arc direction, and moving the head of the screw member into the large-diameter hole (44);
Removing the jig from the parent claw and removing the plurality of child claws from the plurality of parent claw parts;
A method of removing the child claws characterized by comprising:
JP2005152940A 2005-05-25 2005-05-25 Chuck device, tool for exchanging sub-pawl, method for mounting sub-pawl, and method for removing sub-pawl Pending JP2006326747A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735342A (en) * 2015-11-20 2017-05-31 安徽三雕起重机械有限公司 A kind of turning positioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735342A (en) * 2015-11-20 2017-05-31 安徽三雕起重机械有限公司 A kind of turning positioner

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