JP5892471B2 - Swing retractable chuck - Google Patents

Swing retractable chuck Download PDF

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JP5892471B2
JP5892471B2 JP2012085268A JP2012085268A JP5892471B2 JP 5892471 B2 JP5892471 B2 JP 5892471B2 JP 2012085268 A JP2012085268 A JP 2012085268A JP 2012085268 A JP2012085268 A JP 2012085268A JP 5892471 B2 JP5892471 B2 JP 5892471B2
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chuck
hole
claw opening
closing member
claw
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JP2013212565A (en
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上田　浩一
浩一 上田
祥弘 早川
祥弘 早川
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Howa Machinery Ltd
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Howa Machinery Ltd
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Description

本発明は、クランプしたワークをチャック本体の前面に向けて引き込むようにした揺動引込み式チャックに関する。   The present invention relates to a swing-in type chuck in which a clamped workpiece is drawn toward the front surface of a chuck body.

従来、揺動引込み式チャックは、チャック本体に固着される支持部には、支持部の内周に沿ってチャック軸線方向に移動すると共にチャック半径方向に揺動するように爪開閉部材が装着され、その爪開閉部材の先端には把握爪が取付けられ、チャック軸線方向に移動可能な駆動部材により前記爪開閉部材を作動させ、把握爪によってワークをクランプするようにしたものが知られている。そして、引用文献１記載のように、バネ部材によってチャック軸線方向の前方へ移動させた爪開閉部材の把握爪によりワークをクランプし、爪開閉部材を駆動部材により支持部の内面に沿って後方へ移動させることで、ワークをチャック本体の前面に向けて引き込むようになっている。   Conventionally, in a swing-in type chuck, a claw opening / closing member is attached to a support portion fixed to a chuck body so as to move in the chuck axial direction along the inner periphery of the support portion and swing in the chuck radial direction. A gripping claw is attached to the tip of the claw opening / closing member, and the claw opening / closing member is actuated by a driving member movable in the chuck axis direction so that the workpiece is clamped by the gripping claw. Then, as described in the cited document 1, the workpiece is clamped by the gripping claw of the claw opening / closing member moved forward in the chuck axis direction by the spring member, and the claw opening / closing member is moved backward along the inner surface of the support portion by the driving member. By moving it, the workpiece is drawn toward the front surface of the chuck body.

実開平５−４９２０７号公報Japanese Utility Model Publication No. 5-49207

従来では、爪開閉部材の一部を支持部の内周前方に設けた突部に当接させることで、爪開閉部材のチャック軸線方向の前方への移動量が調整されている。ところが、チャック本体に固着される各支持部の組付け精度や突部の加工精度によって各爪開閉部材の前方への移動量が異なり、引き込んだときにワークを歪めるなどの問題が生じ、ワークの加工精度に影響を与える問題があった。また、支持部を交換しなければ爪開閉部材の移動量の調整ができ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、簡単な構成で爪開閉部材のチャック軸線方向の前方への移動量を容易に調整可能とした揺動引込み式チャックを提供することを目的とする。 Conventionally, the amount of forward movement of the claw opening / closing member in the chuck axis direction is adjusted by bringing a part of the claw opening / closing member into contact with a protrusion provided in front of the inner periphery of the support portion. However, the amount of forward movement of each claw opening and closing member differs depending on the assembly accuracy of each support portion fixed to the chuck body and the processing accuracy of the protrusion, causing problems such as distortion of the workpiece when retracted. There was a problem affecting the machining accuracy. In addition, there is a problem that the movement amount of the claw opening / closing member cannot be adjusted unless the support portion is replaced.
In view of the above problems, an object of the present invention is to provide a swing-in type chuck that can easily adjust the amount of forward movement of the claw opening / closing member in the chuck axial direction with a simple configuration. .

本発明は、チャック本体に固着される支持部には、支持部の内周に沿ってチャック軸線方向に移動すると共にチャック半径方向に揺動するように爪開閉部材が装着され、その爪開閉部材の先端には把握爪が取付けられ、チャック軸線方向に移動可能な駆動部材により前記爪開閉部材を作動させ、把握爪によってワークをクランプするようにした揺動引込み式チャックにおいて、爪開閉部材の後端に爪開閉部材を前方へ付勢する付勢機構を設け、支持部に保持される軸部材に、爪開閉部材に備えた調整機構の調整部材を当接させるようにしたことを特徴とする。 According to the present invention, a claw opening / closing member is attached to a support portion fixed to a chuck body so as to move in the chuck axis direction along the inner periphery of the support portion and swing in the chuck radial direction. A gripping claw is attached to the tip of the swinging retractable chuck in which the claw opening / closing member is operated by a driving member movable in the chuck axis direction to clamp the workpiece by the gripping claw. An urging mechanism for urging the claw opening / closing member forward is provided at the end, and the adjustment member of the adjustment mechanism provided in the claw opening / closing member is brought into contact with the shaft member held by the support portion. .

前記爪開閉部材に、チャック軸線と直交する方向に貫通孔を設け、その貫通孔に挿通し、貫通孔との間に隙間を形成する軸部材の両端が支持部に保持され、その軸部材に、軸部材に対して前方へ付勢される爪開閉部材に備えた調整機構の調整部材を当接させるようにしたことを特徴とする。具体的に、前記爪開閉部材の後端から貫通孔に向けてネジ部を備えた取付孔を設け、調整機構の調整部材が取付孔に摺動自在に装着され、ネジ部に捩じ込んだネジ部材によって調整部材の先端を貫通孔内に突出させるようにしたことを特徴とする。更に、前記調整部材の先端に、軸部材に係合可能な円弧状の凹溝を形成したことを特徴とする。 The claw opening / closing member is provided with a through hole in a direction perpendicular to the chuck axis, and both ends of the shaft member that is inserted through the through hole and forms a gap between the through hole are held by the support portion. The adjusting member of the adjusting mechanism provided in the claw opening / closing member biased forward with respect to the shaft member is brought into contact with the shaft member. Specifically, an attachment hole provided with a screw part is provided from the rear end of the claw opening / closing member toward the through hole, and the adjustment member of the adjustment mechanism is slidably attached to the attachment hole and screwed into the screw part. The tip of the adjustment member is protruded into the through hole by the screw member. Furthermore, an arc-shaped concave groove that can be engaged with the shaft member is formed at the tip of the adjusting member.

本発明では、支持部に保持される軸部材に、爪開閉部材に備えた調整機構の調整部材を当接させるようにしたので、調整機構の調整部材の移動のみで爪開閉部材の前方への移動量を速やかに調整できるようになる。また、爪開閉部材に、チャック軸線と直交する方向に貫通孔を設け、その貫通孔に挿通し、貫通孔との間に隙間を形成する軸部材の両端が支持部に保持され、その軸部材に、軸部材に対して前方へ付勢される爪開閉部材に備えた調整機構の調整部材を当接させるようにしたので、支持部に軸部材を介して爪開閉部材を装着した状態のまま、調整機構の調整部材を移動させることが可能であり、爪開閉部材の前方への移動量の調整を容易に行える。また、爪開閉部材の後端から貫通孔に向けてネジ部を備えた取付孔を設け、調整機構の調整部材が取付孔に摺動自在に装着され、ネジ部に捩じ込んだネジ部材によって調整部材の先端を貫通孔内に突出させるようにしたので、調整機構は簡単な構成となり、チャック全体が安価なものとなる。更に、調整部材の先端に、軸部材に係合可能な円弧状の凹溝を形成したので、調整部材の先端と軸部材とが面当たりとなり、ワークのクランプ、アンクランプを繰り返し行っても調整部材の先端の早期の磨耗が防止されるようになる。 In the present invention, since the adjustment member of the adjustment mechanism provided in the claw opening / closing member is brought into contact with the shaft member held by the support portion, only the movement of the adjustment member of the adjustment mechanism moves the claw opening / closing member forward. The amount of movement can be adjusted quickly. Further, the claw opening / closing member is provided with a through hole in a direction orthogonal to the chuck axis, and both ends of the shaft member which is inserted through the through hole and forms a gap between the through hole are held by the support portion. Since the adjustment member of the adjustment mechanism provided in the claw opening / closing member urged forward with respect to the shaft member is brought into contact with the shaft member, the claw opening / closing member is still attached to the support portion via the shaft member. The adjustment member of the adjustment mechanism can be moved, and the amount of forward movement of the claw opening / closing member can be easily adjusted. Also, a mounting hole having a screw part is provided from the rear end of the claw opening / closing member toward the through hole, and the adjusting member of the adjusting mechanism is slidably mounted in the mounting hole, and is screwed into the screw part. Since the tip of the adjustment member is protruded into the through hole, the adjustment mechanism has a simple configuration and the entire chuck is inexpensive. Furthermore, since the arc-shaped concave groove that can be engaged with the shaft member is formed at the tip of the adjustment member, the tip of the adjustment member and the shaft member come into contact with each other, and adjustment is possible even when workpiece clamping and unclamping are repeated. Early wear of the tip of the member is prevented.

本実施形態の揺動引込み式チャックを示す図である。It is a figure which shows the rocking retraction type chuck | zipper of this embodiment. 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. 図２のＩＩＩ−ＩＩＩ線断面図の一部である。It is a part of III-III sectional view taken on the line of FIG. 把握爪をチャック半径方向へ揺動させた状態を示す図である。It is a figure which shows the state which rocked the holding nail | claw in the chuck | zipper radial direction. 図４の状態から、爪開閉部材を前方へ移動させた状態を示す図である。It is a figure which shows the state which moved the nail | claw opening / closing member to the front from the state of FIG. 他の実施形態を示す図である。It is a figure which shows other embodiment.

図１に示す揺動引込み式チャック１のチャック本体２は、図示しない取付ボルトによって前ボディ３の後端面を後ボディ４で塞ぎ、内側に内部空間５が形成されている。チャック本体２のチャック軸線ＣＬ上には駆動部材６が配置され、図示しない駆動源によりチャック軸線ＣＬ方向の前、後方へ移動するようになっている。駆動部材６は、軸形状の案内部材６ａに、後述する各爪開閉部材１１に対応するように形成した係合部材６ｂが取り付けられたものである。前ボディ３にはガイド孔７が穿設され、そのガイド孔７に前記駆動部材６の先端部が案内されている。また、このガイド孔７を前ボディ３前面から塞ぐようにストッパ部材８が取り付けられている。前ボディ３には、複数（本実施形態では３つ）の段付きの支持孔９が円周方向に等間隔に穿設されている。各支持孔９の小径孔側は前記内部空間５に連通し、大径孔側は前ボディ３の前面に開口している。各支持孔９には段付き形状の支持部１０が固着され、各支持部１０の内周に沿ってチャック軸線ＣＬ方向に移動すると共にチャック半径方向に揺動するように爪開閉部材１１が夫々装着されている。各支持部１０にはシール部材１２が配設され、支持孔９の大径孔を塞ぐように蓋部材１３が取り付けられている。   The chuck body 2 of the swing-in retractable chuck 1 shown in FIG. 1 has an inner space 5 formed inside by closing the rear end surface of the front body 3 with a rear body 4 by mounting bolts (not shown). A drive member 6 is disposed on the chuck axis CL of the chuck body 2 and is moved forward and backward in the direction of the chuck axis CL by a drive source (not shown). The drive member 6 is obtained by attaching an engagement member 6b formed to correspond to each claw opening / closing member 11 described later to an axial guide member 6a. A guide hole 7 is formed in the front body 3, and the tip end portion of the driving member 6 is guided in the guide hole 7. A stopper member 8 is attached so as to close the guide hole 7 from the front surface of the front body 3. A plurality (three in this embodiment) of stepped support holes 9 are formed in the front body 3 at equal intervals in the circumferential direction. The small-diameter hole side of each support hole 9 communicates with the internal space 5, and the large-diameter hole side opens on the front surface of the front body 3. A stepped support 10 is fixed to each support hole 9, and a claw opening / closing member 11 is moved so as to move in the chuck axis CL direction and swing in the chuck radial direction along the inner periphery of each support 10. It is installed. Each support portion 10 is provided with a seal member 12, and a lid member 13 is attached so as to close the large-diameter hole of the support hole 9.

前記支持部１０の内周には、爪開閉部材１１に形成した球状部１４と同一径の内周面１５及び、爪開閉部材１１の球状部１４と同一径の球面１６が形成されている。爪開閉部材１１は先端に把握爪１７の取付け部１８が形成され、その取付け部１８に前記球状部１４、軸部１９が連設されている。軸部１９の後端には、後述する貫通孔２４に向けて装着孔２０が設けられ、その装着孔２０に付勢機構２１の付勢部材２２が摺動自在に装着されている。付勢機構２１は付勢部材２２とバネ部材２３とから成り、付勢部材２２と前記装着孔２０の底面との間にバネ部材２３を介在させ、付勢部材２２を後ボディ４に当接させることでバネ部材２３のバネ力により爪開閉部材１１がチャック本体２の前方へ移動するようになっている。球状部１４には、チャック軸線ＣＬと直交する方向に貫通孔２４が設けられている。その貫通孔２４に、貫通孔２４との間に隙間を形成するような軸径を有する軸部材２５が挿通されている。図３に示すように、軸部材２５の両端は支持部１０に夫々保持されている。このことから、爪開閉部材１１は軸部材２５に対して前、後方へ移動可能となっている。また、爪開閉部材１１は、前記隙間の範囲内で支持孔９の軸線を中心に揺動することができる。   An inner peripheral surface 15 having the same diameter as the spherical portion 14 formed on the claw opening / closing member 11 and a spherical surface 16 having the same diameter as the spherical portion 14 of the claw opening / closing member 11 are formed on the inner periphery of the support portion 10. The claw opening / closing member 11 has an attachment portion 18 for the grasping claw 17 at the tip, and the spherical portion 14 and the shaft portion 19 are connected to the attachment portion 18. A mounting hole 20 is provided at the rear end of the shaft portion 19 toward a through hole 24 described later, and a biasing member 22 of a biasing mechanism 21 is slidably mounted in the mounting hole 20. The biasing mechanism 21 includes a biasing member 22 and a spring member 23, and the spring member 23 is interposed between the biasing member 22 and the bottom surface of the mounting hole 20 so that the biasing member 22 contacts the rear body 4. By doing so, the claw opening / closing member 11 is moved forward of the chuck body 2 by the spring force of the spring member 23. The spherical portion 14 is provided with a through hole 24 in a direction orthogonal to the chuck axis CL. A shaft member 25 having an axial diameter that forms a gap with the through hole 24 is inserted into the through hole 24. As shown in FIG. 3, both ends of the shaft member 25 are held by the support portion 10. Thus, the claw opening / closing member 11 can move forward and backward with respect to the shaft member 25. Further, the claw opening / closing member 11 can swing around the axis of the support hole 9 within the gap.

爪開閉部材１１の先端の取付け部１８には、断面Ｔ字のナット溝２６が形成されている。取付け部１８の当接面１８ａに保持部材２７を当接させ、前記ナット溝２６に挿入した凸状のナット部材２８にボルト部材２９を捩じ込むことで、保持部材２７が取付け部１８に取付けられる。その保持部材２７にワークＷの外周面に対応する把持面１７ａが形成された把握爪１７が取付けられている。爪開閉部材１１の軸部１９は、駆動部材６に旋回可能に取付られたロッカボール３０に摺動自在に嵌め込まれている。駆動部材６によりロッカボール３０はチャック軸線ＣＬ方向の前、後方へ移動し、そのロッカボール３０の作動により爪開閉部材１１の先端の取付け部１８はチャック半径方向へ揺動するようになっている。   A nut groove 26 having a T-shaped cross section is formed in the attachment portion 18 at the tip of the claw opening / closing member 11. The holding member 27 is attached to the attachment portion 18 by bringing the holding member 27 into contact with the contact surface 18 a of the attachment portion 18 and screwing the bolt member 29 into the convex nut member 28 inserted into the nut groove 26. It is done. A gripping claw 17 having a gripping surface 17 a corresponding to the outer peripheral surface of the workpiece W is attached to the holding member 27. The shaft portion 19 of the claw opening / closing member 11 is slidably fitted into a rocker ball 30 that is pivotably attached to the drive member 6. The rocker ball 30 is moved forward and backward in the chuck axis CL direction by the driving member 6, and the mounting portion 18 at the tip of the claw opening / closing member 11 is swung in the chuck radial direction by the operation of the rocker ball 30. .

前記爪開閉部材１１の後端の装着孔２０から貫通孔２４に向けてネジ部３１ａを備えた取付孔３１が設けられている。その取付孔３１には、爪開閉部材１１の移動量Ｌを調整可能な調整機構３２が備えられている。調整機構３２は、調整部材３３、球部材３４、ネジ部材３５とから成る。取付孔３１の先端側には摺動自在に調整部材３３が装着され、ネジ部３１ａに捩じ込んだネジ部材３５を球部材３４を介して前記調整部材３３に係合させ、ネジ部材３５を捩じ込むことで調整部材３３の先端が貫通孔２４内へ突出するようになっている。よって、爪開閉部材１１に備えた調整機構３２の調整部材３３の先端と軸部材２５との距離が爪開閉部材１１の前方への移動量Ｌとなり、具体的には、貫通孔２４内への突出量を増やせば爪開閉部材１１の前方への移動量Ｌが小さく、貫通孔２４内への突出量を減らせば爪開閉部材１１の前方への移動量Ｌは大きくなる。また、調整部材３３の先端には、軸部材２５に係合可能な円弧状の凹溝３３ａが形成され、その円弧状の凹溝３３ａと軸部材２５とが面当りするようになっている。   A mounting hole 31 having a screw portion 31 a is provided from the mounting hole 20 at the rear end of the claw opening / closing member 11 toward the through hole 24. The attachment hole 31 is provided with an adjustment mechanism 32 that can adjust the movement amount L of the claw opening / closing member 11. The adjustment mechanism 32 includes an adjustment member 33, a ball member 34, and a screw member 35. An adjustment member 33 is slidably mounted on the distal end side of the mounting hole 31, and a screw member 35 screwed into the screw portion 31 a is engaged with the adjustment member 33 via a ball member 34. By screwing, the tip of the adjustment member 33 protrudes into the through hole 24. Therefore, the distance between the tip of the adjustment member 33 of the adjustment mechanism 32 provided in the claw opening / closing member 11 and the shaft member 25 becomes the forward movement amount L of the claw opening / closing member 11, specifically, into the through hole 24. If the protrusion amount is increased, the forward movement amount L of the claw opening / closing member 11 is small, and if the protrusion amount into the through hole 24 is decreased, the forward movement amount L of the claw opening / closing member 11 is increased. Further, an arcuate groove 33a that can be engaged with the shaft member 25 is formed at the tip of the adjustment member 33, and the arcuate groove 33a and the shaft member 25 come into contact with the surface.

上記構成の揺動引込み式チャック１の動作について説明する。チャック本体２は取付ボルト５０により旋盤等の主軸部５１前端に固着され、主軸部５１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５１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（図示しない）を介して駆動部材６が連結され、ピストンの作動により駆動部材６がチャック軸線ＣＬ方向の前、後方へ移動するようになっている。ワークＷをクランプする前には、図４に示すように、駆動部材６をチャック軸線ＣＬ方向の前方へ移動させ、ロッカボール３０の作動により爪開閉部材１１の先端の把握爪１７をチャック半径方向の外方へ揺動させると共に、図５に示すように、調整機構３２の調整部材３３の先端が軸部材２５に当接するまで、付勢機構２１により爪開閉部材１１を支持部１０の内周面１５に沿って前方へ移動させる。この状態にて、チャック本体２の前方にワークＷが運ばれてくると、図５から図２に示すように、駆動部材６をチャック軸線ＣＬ方向の後方へ移動させ、ロッカボール３０の作動により爪開閉部材１１の先端の把握爪１７をチャック半径方向の内方へ揺動させ、複数の把握爪１７によりワークＷをクランプする。そして、駆動部材６は後方へ移動し続け、ロッカボール３０の作動によりワークＷをクランプした爪開閉部材１１を後方へ移動させる。支持部１０の球面部１６に球状部１４が当接すると、駆動部材６の移動が停止すると共に、チャック本体２前面に固着されたストッパ部８にワークＷの端面が押し付けられる。その後、チャック本体２を回転させ、図示しない工具によってワークＷが加工される。ワークＷの加工が終了した後、図５に示すように、駆動部材６をチャック軸線方向の前方へ移動させ、各爪開閉部材１１の先端の把握爪１７をチャック半径方向の外方へ移動させることで、ワークＷがアンクランプされるようになっている。   The operation of the swinging retractable chuck 1 having the above configuration will be described. The chuck body 2 is fixed to the front end of the main shaft portion 51 such as a lathe by a mounting bolt 50 so that the chuck main body 2 rotates with the rotation of the main shaft portion 51. The drive member 6 is connected to a piston (not shown) of a rotary cylinder (not shown) installed at the rear end of the main shaft 51 via a connecting rod (not shown). It moves to the front and back in the CL direction. Before clamping the workpiece W, as shown in FIG. 4, the drive member 6 is moved forward in the chuck axis CL direction, and the rocker ball 30 is operated to move the gripping claw 17 at the tip of the claw opening / closing member 11 in the chuck radial direction. 5, and the claw opening / closing member 11 is moved by the urging mechanism 21 until the tip of the adjustment member 33 of the adjustment mechanism 32 contacts the shaft member 25 as shown in FIG. 5. Move forward along the surface 15. In this state, when the workpiece W is carried in front of the chuck body 2, the drive member 6 is moved rearward in the direction of the chuck axis CL as shown in FIG. 5 to FIG. The gripping claw 17 at the tip of the claw opening / closing member 11 is swung inward in the chuck radial direction, and the workpiece W is clamped by the plurality of gripping claws 17. The drive member 6 continues to move backward, and the claw opening / closing member 11 that clamps the workpiece W is moved backward by the operation of the rocker ball 30. When the spherical portion 14 comes into contact with the spherical portion 16 of the support portion 10, the movement of the driving member 6 stops and the end surface of the workpiece W is pressed against the stopper portion 8 fixed to the front surface of the chuck body 2. Thereafter, the chuck body 2 is rotated, and the workpiece W is processed with a tool (not shown). After the processing of the workpiece W is completed, as shown in FIG. 5, the driving member 6 is moved forward in the chuck axial direction, and the grasping claws 17 at the tips of the respective pawl opening / closing members 11 are moved outward in the chuck radial direction. As a result, the workpiece W is unclamped.

尚、本実施形態では、爪開閉部材１１に設けた貫通孔２４に挿通し、貫通孔２４との間に隙間を形成する軸部材２５の両端が支持部１０に保持され、爪開閉部材１１を軸部材２５に対して前、後方へ移動するようにしたものであるが、図６に示すように、爪開閉部材１１Ａに設けた貫通孔２４Ａに軸部材２５Ａ（２５Ｂ）が一体的に保持され、その軸部材２５Ａ（２５Ｂ）との間に隙間を形成するような保持孔４０を支持部１０Ａおよびチャック本体２Ａ（２Ｂ）に設け、爪開閉部材１１Ａを保持孔４０に対して前、後方へ移動するようにしたものであってもよい。この場合には、調整機構３２Ａを支持部１０Ａまたはチャック本体２Ｂに備えることで、調整機構３２Ａの調整部材３３Ａの先端を前方へ付勢される爪開閉部材１１Ａに一体的に保持される軸部材２５Ａ（２５Ｂ）に当接させることになる。   In the present embodiment, both ends of the shaft member 25 that is inserted into the through hole 24 provided in the claw opening / closing member 11 and forms a gap between the through hole 24 are held by the support portion 10, and the claw opening / closing member 11 is As shown in FIG. 6, the shaft member 25A (25B) is integrally held in the through hole 24A provided in the claw opening / closing member 11A. A holding hole 40 that forms a gap with the shaft member 25A (25B) is provided in the support portion 10A and the chuck body 2A (2B), and the claw opening / closing member 11A is moved forward and backward with respect to the holding hole 40. It may be configured to move. In this case, by providing the adjustment mechanism 32A in the support portion 10A or the chuck body 2B, the shaft member that is integrally held by the claw opening / closing member 11A that is biased forward by the adjustment member 33A of the adjustment mechanism 32A. It will be brought into contact with 25A (25B).

以上のように、支持部１０に保持される軸部材２５に、爪開閉部材１１に備えた調整機構３２の調整部材３３を当接させるようにしたので、従来のように、支持部１０の交換により爪開閉部材１１の移動量Ｌの調整に多くの時間が掛かるものに比べ、調整機構３２の調整部材３３の移動のみで爪開閉部材１１の前方への移動量Ｌを速やかに調整できる。また、爪開閉部材１１にはチャック軸線ＣＬと直交する方向に貫通孔２４を設け、その貫通孔２４に挿通し、貫通孔２４との間に隙間を形成する軸部材２５の両端が支持部１０に保持され、その軸部材２５に、軸部材２５に対して前方へ付勢される爪開閉部材１１に備えた調整機構３２の調整部材３３を当接させるようにしたので、支持部１０に軸部材２５を介して爪開閉部材１１を装着した状態のまま、調整機構３２の調整部材３３を移動させることが可能であり、爪開閉部材１１の前方への移動量Ｌの調整を容易にできる。
As described above, the adjustment member 33 of the adjustment mechanism 32 provided in the claw opening / closing member 11 is brought into contact with the shaft member 25 held by the support portion 10, so that the replacement of the support portion 10 can be performed as in the past. As a result, the amount of forward movement L of the claw opening / closing member 11 can be quickly adjusted only by movement of the adjustment member 33 of the adjustment mechanism 32 as compared with the case where adjustment of the movement amount L of the claw opening / closing member 11 takes much time. Further, the claw opening / closing member 11 is provided with a through hole 24 in a direction orthogonal to the chuck axis CL, and the both ends of the shaft member 25 that is inserted through the through hole 24 and forms a gap between the through hole 24 are the support portion 10. The adjustment member 33 of the adjustment mechanism 32 provided in the claw opening / closing member 11 that is held by the shaft member 25 and is biased forward with respect to the shaft member 25 is brought into contact with the shaft member 25. The adjustment member 33 of the adjustment mechanism 32 can be moved while the claw opening / closing member 11 is mounted via the member 25, and the adjustment of the forward movement amount L of the claw opening / closing member 11 can be facilitated.

また、爪開閉部材１１の後端から貫通孔２４に向けてネジ部３１ａを備えた取付孔３１を設け、調整機構３２の調整部材３３が取付孔３１に摺動自在に装着され、ネジ部３１ａに捩じ込んだネジ部材３５によって調整部材３３の先端を貫通孔２４内に突出させるようにしたので、調整機構３２が簡単な構成となり、チャック１全体を安価なものにできる。更に、調整部材３３の先端に、軸部材２５に係合可能な円弧状の凹溝を形成したので、調整部材３３の先端と軸部材２５とが面当りとなり、ワークＷのクランプ、アンクランプを繰り返し行っても調整部材３３の先端の早期の磨耗を防止できる。   Further, an attachment hole 31 having a screw portion 31a is provided from the rear end of the claw opening / closing member 11 toward the through hole 24, and the adjustment member 33 of the adjustment mechanism 32 is slidably attached to the attachment hole 31, and the screw portion 31a. Since the tip of the adjustment member 33 is projected into the through hole 24 by the screw member 35 screwed into the adjustment member 32, the adjustment mechanism 32 has a simple configuration, and the entire chuck 1 can be made inexpensive. Furthermore, since the arc-shaped concave groove that can be engaged with the shaft member 25 is formed at the tip of the adjustment member 33, the tip of the adjustment member 33 and the shaft member 25 come into contact with each other, and the workpiece W is clamped and unclamped. Even if it repeats, the early wear of the tip of adjustment member 33 can be prevented.

１ 揺動引込み式チャック
２ チャック本体
６ 駆動部材
１０ 支持部
１１ 爪開閉部材
１７ 把握爪
２１ 付勢機構
２４ 貫通孔
２５ 軸部材
３１ 取付孔
３１ａ ネジ部
３２ 調整機構
３３ 調整部材
３３ａ 凹溝
ＣＬ チャック軸線
Ｗ ワーク DESCRIPTION OF SYMBOLS 1 Oscillation retraction type chuck 2 Chuck main body 6 Drive member 10 Support part 11 Claw opening / closing member 17 Grasp claw 21 Energizing mechanism 24 Through hole 25 Shaft member 31 Mounting hole 31a Screw part 32 Adjustment mechanism 33 Adjustment member 33a Concave groove CL Chuck axis W Work

Claims (4)

チャック本体に固着される支持部には、支持部の内周に沿ってチャック軸線方向に移動すると共にチャック半径方向に揺動するように爪開閉部材が装着され、その爪開閉部材の先端には把握爪が取付けられ、チャック軸線方向に移動可能な駆動部材により前記爪開閉部材を作動させ、把握爪によってワークをクランプするようにした揺動引込み式チャックにおいて、爪開閉部材の後端に爪開閉部材を前方へ付勢する付勢機構を設け、支持部に保持される軸部材に、爪開閉部材に備えた調整機構の調整部材を当接させるようにしたことを特徴とする揺動引込み式チャック。 A claw opening / closing member is mounted on the support portion fixed to the chuck body so as to move in the chuck axial direction along the inner periphery of the support portion and swing in the chuck radial direction. In a swing-in type chuck where a gripping claw is attached and the claw opening / closing member is operated by a drive member movable in the chuck axis direction and the workpiece is clamped by the gripping claw, the claw is opened / closed at the rear end of the claw opening / closing member An oscillating retractable type characterized in that an urging mechanism for urging the member forward is provided, and the adjusting member of the adjusting mechanism provided in the claw opening / closing member is brought into contact with the shaft member held by the support portion. Chuck. 爪開閉部材に、チャック軸線と直交する方向に貫通孔を設け、その貫通孔に挿通し、貫通孔との間に隙間を形成する軸部材の両端が支持部に保持され、その軸部材に、軸部材に対して前方へ付勢される爪開閉部材に備えた調整機構の調整部材を当接させるようにしたことを特徴とする請求項１記載の揺動引込み式チャック。 The claw opening and closing member is provided with a through hole in a direction orthogonal to the chuck axis, and the both ends of the shaft member that is inserted through the through hole and forms a gap between the through hole are held by the support portion. 2. The swinging retractable chuck according to claim 1, wherein an adjustment member of an adjustment mechanism provided in a claw opening / closing member biased forward with respect to the shaft member is brought into contact. 爪開閉部材の後端から貫通孔に向けてネジ部を備えた取付孔を設け、調整機構の調整部材が取付孔に摺動自在に装着され、ネジ部に捩じ込んだネジ部材によって調整部材の先端を貫通孔内に突出させるようにしたことを特徴とする請求項２記載の揺動引込み式チャック。 An attachment hole having a screw part is provided from the rear end of the claw opening / closing member toward the through hole, and the adjustment member of the adjustment mechanism is slidably attached to the attachment hole, and the adjustment member is screwed into the screw part. 3. The swinging retractable chuck according to claim 2 , wherein the tip of the protrusion protrudes into the through hole. 調整部材の先端に、軸部材に係合可能な円弧状の凹溝を形成したことを特徴とする請求項２または３記載の揺動引込み式チャック。 4. The swinging retractable chuck according to claim 2, wherein an arcuate concave groove that can be engaged with the shaft member is formed at the tip of the adjustment member.
JP2012085268A 2012-04-04 2012-04-04 Swing retractable chuck Active JP5892471B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019208379A1 (en) 2018-04-27 2019-10-31 豊和工業株式会社 Seal structure for oscillating type chuck, and oscillating type chuck

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WO2019244664A1 (en) * 2018-06-19 2019-12-26 株式会社北川鉄工所 Chuck including drawing function

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Publication number Priority date Publication date Assignee Title
FR1028537A (en) * 1950-11-28 1953-05-26 Machining chuck
US2948542A (en) * 1958-05-29 1960-08-09 Gisholt Machine Co Two-jaw indexing chuck
JPS5528406Y2 (en) * 1976-02-14 1980-07-07
JPH0549207U (en) * 1991-12-04 1993-06-29 帝国チャック株式会社 Chuck for lathe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019208379A1 (en) 2018-04-27 2019-10-31 豊和工業株式会社 Seal structure for oscillating type chuck, and oscillating type chuck
KR20210002657A (en) 2018-04-27 2021-01-08 호와고교 가부시키가이샤 Seal structure of swing type chuck and swing type chuck

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