JP4002750B2 - Broach shank gripping device - Google Patents

Broach shank gripping device Download PDF

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Publication number
JP4002750B2
JP4002750B2 JP2001364628A JP2001364628A JP4002750B2 JP 4002750 B2 JP4002750 B2 JP 4002750B2 JP 2001364628 A JP2001364628 A JP 2001364628A JP 2001364628 A JP2001364628 A JP 2001364628A JP 4002750 B2 JP4002750 B2 JP 4002750B2
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JP
Japan
Prior art keywords
shank
sleeve
broaching
main body
gripping device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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JP2001364628A
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Japanese (ja)
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JP2003165018A (en
JP2003165018A5 (en
Inventor
吉明 松本
勝行 嶋作
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Nachi Fujikoshi Corp
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Nachi Fujikoshi Corp
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Priority to JP2001364628A priority Critical patent/JP4002750B2/en
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Description

【0001】
【産業上の利用分野】
本発明は内面ブローチ加工における、ブローチシャンクをつかむ、ブローチシャンク把持装置に関する。
【0002】
【従来の技術】
従来、ブローチ工具を使って内面ブローチ加工をする場合、特開平6−126526号公報に開示する図5のようなブローチシャンク把持装置を使用していた。この把持装置の本体51にシャンク挿入穴54が設けられ、この本体51の軸心線上に放射状に4個の爪部材52が、シャンク挿入穴54内に突出可能に配置した構造であり、ブローチシャンク50をシャンク挿入穴54に挿入し、スリーブ53を本体51の先端側にスライドさせることにより、スリーブ53が爪部材52をブローチシャンク50のくびれ部56に当接し、爪部材52がくびれ部56を押すことにより、該ブローチシャンク50はシャンク挿入穴54内に爪部材52を介して本体51につかまれ、把持される。55はスリーブ53を戻すスプリングである。
【0003】
かかる従来のブローチシャンク把持装置では、爪部材52をブローチシャンク50のくびれ部56に当接しても、くびれ部56と爪部材52との間に軸方向の隙間があった。この隙間はブローチシャンク50が本体51により下方に引かれたときはなくなるが、その間及びブローチ加工中ブローチシャンク50と本体51との間で軸方向に動いたり振動したりして加工精度やブローチの寿命に悪い影響を与えていた。
さらにこのものでは、ブローチシャンク50の回転方向の規制もしていなかった。ブローチシャンク50の回転方向の規制方法としては図6に示すように、ブローチシャンク60に片平とり61を設け、本体62にブローチシャンク60を挿入した後で、適当な手段により、ピン63を本体62のピン穴64に挿入していた。しかしながら加工公差が必要であるため、回転方向の隙間65がさけられず、同様に、この隙間により、ブローチ加工中ブローチシャンク50が本体51により下方に引かれたときブローチシャンク50と本体51との間で回転方向に動いたり振動したりして加工精度やブローチの寿命に悪い影響を与えていた。
【0004】
【発明が解決しようとする課題】
本発明の課題は、ブローチシャンクを把持装置本体が把持するとき、ブローチシャンクのくびれ部と爪部材との間に軸方向及び回転方向の隙間を同時になくするように把持され、ブローチ加工中ブローチシャンクが把持装置本体により下方に引かれたときに、両者間で軸方向及び回転方向に動いたり振動したりして加工精度やブローチの寿命に悪い影響を与えることのない、ブローチシャンク把持装置を提供することにある。
【0005】
【課題を解決する手段】
このため本発明は先端に隣接した面取り部、ランド部、くびれ部及び一対の平取部を順に有するブローチシャンクを使用し、把持装置は、本体と、本体の外側に回転可能に本体に支持されたスリーブと、本体の第1の半径方向穴に移動可能に嵌合され内方端部が前記面取り部と接可能で外方端部が前記スリーブの第1の周溝と嵌合する下爪と、本体の第2の半径方向穴に移動可能に嵌合され内方端部が前記くびれ部と当接可能で外方端部が前記スリーブの第2の周溝と嵌合する上爪と、本体の第3の半径方向穴に移動可能に嵌合し内方端部が前記平取部に隙間なく可能で外方端部が前記スリーブが支持する傾斜面に嵌合する一対のパッドと、を有し、前記第1の及び第2の周溝は前記下爪及び上爪を押す傾斜カム面を有し、前記ブローチシャンクを前記本体が把持するとき、前記スリーブは所定角度回転駆動されて、ブローチシャンクはランド部を挟む下爪と上爪とにより軸方向の隙間と、一対の平取部とパッドとによる回転方向の隙間を同時になくするように本体に把持されることを特徴とするブローチシャンク把持装置を提供することによって上述した本発明の課題を解決した。
【0006】
【発明の効果】
本発明の構成により、ブローチシャンクを本体が把持するとき、スリーブは所定角度回転駆動されて、ブローチシャンクはランド部を挟む下爪と上爪とにより軸方向の隙間と、一対の平取部とパッドとによる回転方向の隙間を同時になくするように本体に把持され、ブローチ加工中ブローチシャンクが把持装置本体により下方に引かれたときに、両者間で軸方向及び回転方向に動いたり振動したりして加工精度やブローチの寿命に悪い影響を与えることのない、ブローチシャンク把持装置を提供するものとなった。
【0007】
【発明の実施の形態】
図1は本発明の実施形態であるブローチシャンク把持装置の2個の立面半断面図で、パッド9、上爪2及び下爪 16 は、右半断面図では、それぞれゆるめ及び開き状態にあり、左半断面図ではそれぞれ締め及び閉じ状態にある。図2は図1のガイド14の斜視図、図3(a)は図1のブローチシャンクの部分正面図、(b)は(a)の右部分側面図、図4は半径方向軸 29 軸受20及びスリーブ3の回転角度とパッド9、上爪2及び下爪16の状態との関係をそれぞれ示す
【0008】
本発明のブローチシャンク把持装置は、先端22に隣接した面取り部21とランド部34を挟みくびれ部23とを有するブローチシャンク30を使用し、把持装置は、本体1の第1の半径方向穴 29'に移動可能に嵌合され内方端部が前記面取り部21と第1のバネ18で押されて当接可能な下爪16と、本体1の第2の半径方向穴32に移動可能に嵌合され内方端部が前記くびれ部23と当接可能な上爪2と、を有し、前記下爪16が前記面取り部と、前記上爪2が前記くびれ部23に隙間なく当接された状態ではブローチシャンク30はランド部34を挟み下爪16と上爪2と、を有し、前記スリーブ3の第1の周溝25及び第2の周溝26はそれぞれ周方向に漸次浅くされており、図1に示すブローチシャンク把持装置は、上爪2及び下爪16は、右半断面図の、それぞれゆるめ及び開き状態から、スリーブ3を図2でみて、0°の位置にある軸受20が45°の位置まで、45°回転することにより、左半断面図の、締め及び閉じ状態になり、ブローチシャンク30はランド部34を挟み下爪16と上爪2とにより軸方向に本体1に隙間なく把持される。スリーブ3を図2でみて、45°逆方向に回転されることにより、右半断面図の状態の原位置に戻される。
【0009】
さらに図1のブローチシャンク把持装置は、先端22に隣接したくびれ部 23 の上方に一対の平取部31を有するブローチシャンク30を使用し、本体1と本体1の外側に回転可能に本体1に支持されたスリーブ3と、スリーブ3の外側にかつ本体1に第2のバネ19を介して軸方向に移動可能に支持されたリング6と、リング6に固定されガイド14と、前記本体1の第3の半径方向穴33に移動可能に嵌合し内方端部が前記平取部31に隙間なく当接するようにされかつ外方端部が前記リング6の内側傾斜面27に当接可能にされた一対のパッド9と、を有し、スリーブ3に支持されたリング6の内側傾斜面27は下方に向けて漸次縮径され、かつ前記スリーブ3その一端を固定された半径方向軸29を有し、前記半径方向軸29の他端に軸受20が配置され、軸受20は前記ガイド14に設けられたカム面28と当接し、スリーブ3を図2でみて、0°の位置にある軸受20が45°の位置まで、45°回転されることにより、ガイド14はリング6と共に第2のバネ19に押されて上昇し、リング6の内側傾斜面27は前記パッド9を半径方向内方に押し内方端部が前記平取部31に隙間なく当接するようにされている。即ち図1の右半断面図の、ゆるめ状態から、リング6の内側傾斜面27がパッド9を半径方向内方に押して左半断面図の、締め状態になり、ブローチシャンク30の一対の平取部31はパッド9より半径方向に本体1に隙間なく把持される。45°逆方向に回転されることにより、右半断面図の状態の原位置に戻される。
【0010】
スリーブ3はレバー5を介して流体シリンダで駆動するようにすることにより、ブローチシャンクを本体が把持するとき、ブローチシャンクの面取り部21とランド部34を挟むくびれ部23と、下爪16と上爪2との間の軸方向の隙間及びブローチシャンクの回転方向の隙間を同時になくすことができる。
【0011】
作動においては、ブローチシャンク把持装置は、パッド9、上爪2及び下爪16は、それぞれゆるめ及び開き状態にある、右半断面図の状態でブローチシャンク30が本体1に挿入される。このとき軸受20の中心はガイド14に設けられたカム面28の図2の0°の位置にある。上爪2は開いているので、ブローチシャンク30の端面22は下爪16に当たり下爪16の第1のバネ18を押して下降し、面取り部21が第1のバネ18に押された下爪16と嵌合して軸方向位置決めされる。図示しないエアシリンダにより、レバー5及びスリーブ3が矢印の右回りに回転されると図2の0°の位置から45°の位置に移動すると、図4に示す軸受20及びスリーブ3の回転により、図1の左半断面図の状態になる。即ち、パッド9は一対の平取部31を隙間なく押してブローチシャンク30の回転を規制し、上爪2及び下爪16は閉じ及び締まりの状態になり、ブローチシャンク30のランド部34を挟み下爪16と上爪2とにより面取り部21とくびれ部23を隙間なく押した状態となり、ブローチシャンク30は軸方向に本体1に隙間なく把持される。図示しないエアシリンダにより、レバー5及びスリーブ3が矢印と反対に左回りに回転されると、図2の45°の位置からの0°位置に移動され、図1の右半断面図の状態になる。
【0012】
かかる構成により、例えば10 m/min以上といった高速度ブローチ加工あるいわ焼入後の歪み取のためのハードブローチ加工において、ブローチシャンクを本体が把持するとき、ブローチシャンクのくびれ部と爪部材との間に軸方向の隙間がなく、ブローチ加工中ブローチシャンクが本体により下方に引かれたときに、両者間で振動、衝撃が発生することのない、かつブローチシャンクを本体が把持するとき、ブローチシャンクの回転方向の隙間がなく、ブローチ加工中ブローチシャンクが把持装置本体により下方に引かれたときに、両者間で軸方向及び回転方向に動いたり振動したりして加工精度やブローチの寿命に悪い影響を与えることがなく、ブローチの加工精度を、例えば従来のブローチシャンク把持装置を使用した場合、リード誤差が通常約10μmの場合、本発明のブローチシャンク把持装置を使用すると、約7μmに、向上させることが出来た。又、ブローチの寿命を延ばすブローチシャンク把持装置となった。スリーブ3はレバー5を介して流体シリンダで駆動するようにすることにより、ブローチシャンクを本体が把持するとき、ブローチシャンクのくびれ部と爪部材との間の軸方向の隙間及びブローチシャンクの回転方向の隙間を同時になくすコンパクトで安価なブローチシャンク把持装置を提供できるものとなった。
【図面の簡単な説明】
【図1】本発明の実施形態であるブローチシャンク把持装置の2個の立面半断面図で、パッド9、上爪2及び下爪 16 は、右半断面図では、それぞれゆるめ及び開き状態にあり、左半断面図ではそれぞれ締め及び閉じ状態にある。
【図2】図1のガイド14の斜視図。
【図3】(a)は図1のブローチシャンクの部分正面図、(b)は(a)の右部分側面図。
【図4】半径方向軸 29 軸受20及びスリーブ3の回転とパッド9、上爪2及び下爪16の状態、をそれぞれ示す。
【図5】従来のブローチシャンク把持装置の立面半断面図。
【図6】従来の回転方向を規制したブローチシャンク把持装置の部分断面図。
【符号の説明】
1・・本体、2・・上爪、3・・スリーブ、5・・レバー、6・・リング、9・・パッド、14・・ガイド、16・・下爪、18・・第1のバネ、19・・第2のバネ、20・・軸受、
21・・面取り部、22・・ブローチシャンク先端、23・・くびれ部、25・・スリーブの第1の周溝、26・・スリーブの第2の周溝、27・・スリーブが支持する傾斜面(リングの内側傾斜面)、30・・ブローチシャンク、29 ・・半径方向軸29' ・・第1半径方向穴
31 ・・平取部32 ・・第2半径方向穴33 ・・第3半径方向穴、34・・ランド部
[0001]
[Industrial application fields]
The present invention relates to a broaching shank gripping device for gripping a broaching shank in internal broaching.
[0002]
[Prior art]
Conventionally, when an inner surface broaching is performed using a broach tool, a broaching shank gripping device as shown in FIG. 5 disclosed in Japanese Patent Laid-Open No. 6-126526 has been used. A shank insertion hole 54 is provided in the main body 51 of the gripping device, and four claw members 52 are radially arranged on the axis of the main body 51 so as to protrude into the shank insertion hole 54. 50 is inserted into the shank insertion hole 54, and the sleeve 53 is slid toward the distal end side of the main body 51, whereby the sleeve 53 abuts the claw member 52 on the constricted portion 56 of the broach shank 50, and the claw member 52 disengages the constricted portion 56. By pushing, the broach shank 50 is grasped and gripped by the main body 51 via the claw member 52 in the shank insertion hole 54. 55 is a spring for returning the sleeve 53.
[0003]
In such a conventional broaching shank gripping device, even when the claw member 52 is brought into contact with the constricted portion 56 of the broaching shank 50, there is an axial gap between the constricted portion 56 and the claw member 52. This gap disappears when the broaching shank 50 is pulled downward by the main body 51, but during that time and during broaching, it moves or vibrates between the broaching shank 50 and the main body 51 and vibrates. It had a bad effect on life.
In addition, the rotational direction of the broaching shank 50 was not restricted in this product. As shown in FIG. 6, as a method of regulating the rotation direction of the broach shank 50, a single flat 61 is provided in the broach shank 60, and after inserting the broach shank 60 into the main body 62, the pin 63 is attached to the main body 62 by an appropriate means. It was inserted into the pin hole 64. However, since a machining tolerance is required, a clearance 65 in the rotational direction is not avoided. Similarly, when the broaching shank 50 is pulled downward by the main body 51 during broaching, the clearance between the broaching shank 50 and the main body 51 is reduced. It moved in the direction of rotation or vibrated between them, which had a bad effect on machining accuracy and broach life.
[0004]
[Problems to be solved by the invention]
The subject of the present invention is that when the broaching shank is gripped by the gripping device main body, the broaching shank is gripped so as to eliminate the axial and rotational gaps simultaneously between the constricted portion of the broaching shank and the claw member. Provides a broaching shank gripping device that does not adversely affect machining accuracy or broach life when it is pulled downward by the gripping device body and moves or vibrates in the axial and rotational directions between them There is to do.
[0005]
[Means for solving the problems]
Therefore, the present invention uses a broaching shank having a chamfered portion adjacent to the tip , a land portion, a constricted portion, and a pair of flattened portions in order, and the gripping device is supported by the main body and rotatably on the outside of the main body. sleeve and the lower claw first radius is movably fitted in the direction bore inner end said beveled portion and contactable with a outer end of the body is first circumferential groove and the fitting of the sleeve And an upper claw that is movably fitted in the second radial hole of the main body , has an inner end that can be brought into contact with the constricted portion, and an outer end that fits the second circumferential groove of the sleeve. A pair of pads movably fitted in the third radial hole of the main body, the inner end portion being capable of being spaced from the flattening portion without gaps, and the outer end portion being fitted to an inclined surface supported by the sleeve ; It has the first and second circumferential grooves has an inclined cam surface which pushes the lower pawl and upper claw, the Burochishi When the main body is gripped by the main body, the sleeve is driven to rotate at a predetermined angle, and the broaching shank is rotated in the rotational direction by a pair of flattening portions and a pad in the axial direction by the lower and upper claws sandwiching the land portion. The above-described problems of the present invention have been solved by providing a broaching shank gripping device characterized by being gripped by the main body so as to eliminate the gap at the same time .
[0006]
【The invention's effect】
According to the configuration of the present invention, when the main body grips the broach shank, the sleeve is driven to rotate at a predetermined angle, and the broach shank has an axial gap between the lower and upper claws sandwiching the land portion, a pair of flattening portions and a pad. When the broaching shank is pulled downward by the gripping device body during broaching, it moves or vibrates in the axial direction and the rotational direction between them. Thus, a broaching shank gripping device that does not adversely affect processing accuracy and broach life is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is two elevational half sectional views of a broaching shank gripping device according to an embodiment of the present invention. The pad 9, the upper claw 2 and the lower claw 16 are in a loosened and opened state in the right half sectional view, respectively. In the left half sectional view, each is in a tightened and closed state. 2 is a perspective view of the guide 14 of FIG. 1, FIG. 3 (a) is a partial front view of the broach shank of FIG. 1, (b) is a right side view of (a), and FIG. 4 is a radial shaft 29 . 20 and the rotation angle of the sleeve 3 and the relationship between the pad 9, the upper nail 2 and the lower nail 16 are shown .
[0008]
The broaching shank gripping device of the present invention uses a broaching shank 30 having a chamfered portion 21 adjacent to the tip 22 and a constricted portion 23 sandwiching the land portion 34, and the gripping device uses the first radial hole 29 of the main body 1 . inner end is movably fitted in 'the said chamfered portion 21 and the abutment can lower pawl 16 is pushed by the first spring 18, to be movable in the second radial hole 32 of the main body 1 The upper claw 2 is fitted and the inner end portion can come into contact with the constricted portion 23, the lower claw 16 comes into contact with the chamfered portion, and the upper claw 2 comes into contact with the constricted portion 23 without a gap. In this state, the broaching shank 30 has the lower pawl 16 and the upper pawl 2 with the land portion 34 interposed therebetween, and the first circumferential groove 25 and the second circumferential groove 26 of the sleeve 3 are gradually shallower in the circumferential direction. In the broaching shank gripping device shown in FIG. 1, the upper claw 2 and the lower claw 16 are in a loosened and opened state in the right half sectional view, respectively. Et al., The sleeve 3 as viewed in FIG. 2, to the position of the bearing 20 is 45 ° at the position of 0 °, by rotating 45 °, the left half-section view, will tighten and closed state, brooches shank 30 Land The lower nail 16 and the upper nail 2 sandwich the part 34 and are gripped by the main body 1 in the axial direction without any gap. When the sleeve 3 is viewed in FIG. 2 and rotated in the opposite direction by 45 ° , the sleeve 3 is returned to the original position in the right half sectional view.
[0009]
Further, the broaching shank gripping device of FIG. 1 uses a broaching shank 30 having a pair of flattening portions 31 above a constricted portion 23 adjacent to the tip 22 and is supported on the main body 1 so as to be rotatable outside the main body 1 and the main body 1. The sleeve 3, the ring 6 supported on the outside of the sleeve 3 and on the main body 1 through the second spring 19 so as to be movable in the axial direction, the guide 14 fixed to the ring 6, and the first of the main body 1 . 3 is movably fitted in the radial hole 33 so that the inner end is in contact with the flattening portion 31 with no gap and the outer end is in contact with the inner inclined surface 27 of the ring 6. The inner inclined surface 27 of the ring 6 supported by the sleeve 3 is gradually reduced in diameter downward, and the sleeve 3 has a radial shaft 29 with one end fixed. A bearing 20 is disposed at the other end of the radial shaft 29, the bearing 20 The guide 14 is brought into contact with the ring 6 by contacting the cam surface 28 provided on the guide 14 and rotating the bearing 20 at 0 ° to 45 ° by 45 ° when the sleeve 3 is viewed in FIG. The inner spring 27 is pushed by the second spring 19 and rises, and the inner inclined surface 27 of the ring 6 pushes the pad 9 inward in the radial direction so that the inner end abuts against the chamfer 31 without a gap. That is, from the loosened state in the right half sectional view of FIG. 1, the inner inclined surface 27 of the ring 6 pushes the pad 9 inward in the radial direction to the tightened state of the left half sectional view, and a pair of flattening portions of the broach shank 30 31 is held by the main body 1 in the radial direction from the pad 9 without a gap. By rotating in the opposite direction by 45 °, the original position in the state of the right half sectional view is restored.
[0010]
The sleeve 3 is driven by a fluid cylinder via the lever 5, so that when the main body grips the broach shank, the constricted portion 23 sandwiching the chamfered portion 21 and the land portion 34 of the broach shank, the lower claw 16 and the upper The gap in the axial direction between the claws 2 and the gap in the rotational direction of the broach shank can be eliminated at the same time.
[0011]
In operation, the broaching shank gripping device has the broaching shank 30 inserted into the main body 1 with the pad 9, the upper claw 2 and the lower claw 16 in the loosened and opened state, respectively, in the state of the right half cross section. At this time, the center of the bearing 20 is at a position of 0 ° in FIG. 2 of the cam surface 28 provided on the guide 14. Since the upper claw 2 is open, the end surface 22 of the broaching shank 30 hits the lower claw 16 and pushes down the first spring 18 of the lower claw 16, and the chamfered portion 21 is pressed by the first spring 18. DOO fitted Ru is axially positioned. When the lever 5 and the sleeve 3 are rotated clockwise in the direction of the arrow by an air cylinder (not shown) , when the lever 5 and the sleeve 3 are moved from the 0 ° position in FIG. 2 to the 45 ° position, the bearing 20 and the sleeve 3 shown in FIG. It will be in the state of the left half sectional view of FIG. That is, the pad 9 presses the pair of flattening portions 31 without any gaps to restrict the rotation of the broaching shank 30, the upper claw 2 and the lower claw 16 are closed and tightened, and the lower claw sandwiches the land portion 34 of the broaching shank 30. The chamfered portion 21 and the constricted portion 23 are pressed without a gap by the 16 and the upper claw 2, and the broach shank 30 is gripped by the main body 1 in the axial direction without a gap. When the lever 5 and the sleeve 3 are rotated counterclockwise by an air cylinder (not shown), the lever 5 and the sleeve 3 are moved to the 0 ° position from the 45 ° position in FIG. Become.
[0012]
With such a configuration, when the main body grips the broach shank in high-speed broach processing such as 10 m / min or more, or hard broach processing for distortion removal after quenching, the constriction between the constricted portion of the broach shank and the claw member When there is no gap in the axial direction and the broaching shank is pulled downward by the main body during broaching, there is no vibration or impact between them, and when the main body grips the broaching shank, the broaching shank When the broaching shank is pulled downward by the gripping device body during broaching, there is no gap in the rotational direction, and it moves or vibrates in the axial and rotational directions between them, resulting in poor machining accuracy and broach life. Without affecting the processing accuracy of the broach, for example, when using a conventional broaching shank gripping device, the lead error will be For normal about 10 [mu] m, by using the broach shank gripping device of the present invention, about 7 [mu] m, it was possible to improve. In addition, the broaching shank gripping device extends the life of the broaching. The sleeve 3 is driven by a fluid cylinder via the lever 5 so that when the main body grips the broach shank, the axial clearance between the constricted portion of the broach shank and the claw member and the rotation direction of the broach shank. It is possible to provide a compact and inexpensive broaching shank gripping device that eliminates the gaps at the same time.
[Brief description of the drawings]
FIG. 1 is an elevational half sectional view of a broaching shank gripping device according to an embodiment of the present invention, in which a pad 9, an upper claw 2 and a lower claw 16 are in a loosened and opened state in a right half sectional view, respectively. Yes, in the left half section view, it is in the tightened and closed state, respectively.
FIG. 2 is a perspective view of the guide 14 of FIG.
3A is a partial front view of the brooch shank of FIG. 1, and FIG. 3B is a right side view of FIG.
FIG. 4 shows the rotation of the radial shaft 29 , the bearing 20 and the sleeve 3 and the state of the pad 9, the upper claw 2 and the lower claw 16 respectively.
FIG. 5 is an elevational half sectional view of a conventional broaching shank gripping device.
FIG. 6 is a partial sectional view of a conventional broaching shank gripping device in which the rotational direction is restricted.
[Explanation of symbols]
1 .... Main body, 2 .... Upper claw, 3 .... Sleeve, 5 .... Lever, 6 .... Ring, 9 .... Pad, 14 .... Guide, 16 .... Lower claw, 18 .... First spring, 19 ・ ・ Second spring, 20 ・ ・ Bearing,
21 ... chamfer 22 ... broach shank tip 23 ... constricted portion, the first circumferential groove 25 ... sleeve, the second circumferential groove 26 ... sleeve, inclined surface 27 ... sleeve support (Inner inclined surface of the ring), 30 ... brooch shank, 29 ... radial axis , 29 ' ... first radial hole ,
31 ·· Chamfer , 32 · · Second radial hole , 33 · · Third radial hole , 34 · · Land

Claims (2)

先端に隣接した面取り部、ランド部、くびれ部及び一対の平取部を順に有するブローチシャンクを使用し、把持装置は、本体と、本体の外側に回転可能に本体に支持されたスリーブと、本体の第1の半径方向穴に移動可能に嵌合され内方端部が前記面取り部と接可能で外方端部が前記スリーブの第1の周溝と嵌合する下爪と、本体の第2の半径方向穴に移動可能に嵌合され内方端部が前記くびれ部と当接可能で外方端部が前記スリーブの第2の周溝と嵌合する上爪と、本体の第3の半径方向穴に移動可能に嵌合し内方端部が前記平取部に隙間なく可能で外方端部が前記スリーブが支持する傾斜面に嵌合する一対のパッドと、を有し、前記第1の及び第2の周溝は前記下爪及び上爪を押す傾斜カム面を有し、前記ブローチシャンクを前記本体が把持するとき、前記スリーブは所定角度回転駆動されて、ブローチシャンクはランド部を挟む下爪と上爪とにより軸方向の隙間と、一対の平取部とパッドとによる回転方向の隙間を同時になくするように本体に把持されることを特徴とするブローチシャンク把持装置。A broaching shank having a chamfered portion adjacent to the tip, a land portion, a constricted portion, and a pair of flattened portions in order, and a gripping device includes a main body, a sleeve rotatably supported on the outer side of the main body , a lower claws first inner end portion is movably fitted in the radial hole is said chamfered portion and contactable with a outer end portion to the first circumferential groove and the fitting of the sleeve, the body a pawl on movably fitted to the inner end portion said constricted portion to second radial hole and can contact an outer end portion is mated with a second circumferential groove of the sleeve, the third body has a pair of pads outer edges possible without clearance engaged inner end fitting to be movable in a radial direction hole the Biratori portion is fitted to the inclined surface of the sleeve support of the said The first and second circumferential grooves have inclined cam surfaces that press the lower and upper claws, and the broaching shank is connected to the main body. When gripping, the sleeve is driven to rotate by a predetermined angle, and the broaching shank eliminates the axial clearance by the lower and upper claws sandwiching the land portion and the rotational clearance by the pair of flattening portions and the pad at the same time. A broaching shank gripping device characterized by being gripped by the main body as described above . 前記スリーブの第1の周溝及び第2の周溝はそれぞれ周方向に漸次浅くされており、前記スリーブの外側にかつ本体に軸方向に移動可能に支持されたリングと、リングに固定されガイドと、前記本体の第3の半径方向穴に移動可能に嵌合し内方端部が前記平取部に隙間なく当接するようにされかつ外方端部が前記リングの内側傾斜面に当接可能にされた前記一対のパッドと、を有し、前記リングの内側傾斜面は下方に向けて漸次縮径され、かつ前記スリーブにはその一端を固定された半径方向軸を有し、前記半径方向軸の他端に軸受が配置され、軸受は前記ガイドに設けられたカム面と当接するようにされ、前記スリーブが前記所定角度回転駆動されるとき、ブローチシャンクはランド部を挟み下爪と上爪とにより軸方向に本体に隙間なく把持され、かつ前記ガイドはリングと共に上昇し、前記リングの内側傾斜面は前記パッドを半径方向内方に押し内方端部が前記平取部に隙間なく把持されるようにされたことを特徴とする請求項1記載のブローチシャンク把持装置。The first circumferential groove and the second circumferential groove of the sleeve are gradually shallower in the circumferential direction, a ring supported on the outside of the sleeve and axially movably in the body, and a guide fixed to the ring. Movably fitted in the third radial hole of the main body so that the inner end is in contact with the flattening part without gaps and the outer end is in contact with the inner inclined surface of the ring has the pair of pads, the inner inclined surface of the ring gradually reduced in diameter downward, and the sleeve has a radial axis which is fixed to one end thereof, said radially A bearing is disposed at the other end of the shaft, the bearing is brought into contact with a cam surface provided in the guide, and when the sleeve is rotated by the predetermined angle , the broach shank sandwiches the land portion and the lower claw. Grip in the main body with no gap in the axial direction with the upper nail It is, and the guide increases with the ring, the inner inclined surface of the ring, characterized in that the inner end pushes the pad radially inwardly is to be gripped without any gap to the Biratori portion The broaching shank gripping device according to claim 1 .
JP2001364628A 2001-11-29 2001-11-29 Broach shank gripping device Expired - Lifetime JP4002750B2 (en)

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JP4119771B2 (en) * 2003-02-26 2008-07-16 株式会社不二越 Internal broaching machine
JP4609790B2 (en) * 2004-02-27 2011-01-12 株式会社不二越 Internal broaching method

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