JP3671166B2 - Tool part removable driver - Google Patents

Tool part removable driver Download PDF

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Publication number
JP3671166B2
JP3671166B2 JP2002141788A JP2002141788A JP3671166B2 JP 3671166 B2 JP3671166 B2 JP 3671166B2 JP 2002141788 A JP2002141788 A JP 2002141788A JP 2002141788 A JP2002141788 A JP 2002141788A JP 3671166 B2 JP3671166 B2 JP 3671166B2
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JP
Japan
Prior art keywords
tool
chuck
press
grip
hole
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
Application number
JP2002141788A
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Japanese (ja)
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JP2003334767A (en
Inventor
定雄 田窪
Original Assignee
株式会社タクボ精機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to JP2002141788A priority Critical patent/JP3671166B2/en
Publication of JP2003334767A publication Critical patent/JP2003334767A/en
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Description

【0001】
【発明の属する技術分野】
本発明は螺子の規格に合わせて工具部が交換可能な工具部着脱式ドライバ、特に精密作業に使用される工具部着脱式ドライバに関するものである。
【0002】
【従来の技術】
螺子を着脱する工具としてドライバが広く使用されており、又種々の規格に合わせたドライバを用意する代りに1つの握り部に対して複数の工具部を着脱可能とし、経済性、汎用性を高めた工具部着脱式ドライバがある。
【0003】
図6、図7に於いて従来の工具部着脱式ドライバについて説明する。
【0004】
図中、1は握り部、2は工具部を示し、前記握り部1は先端部にコレットチャック部3を有し、前記工具部2は前記コレットチャック部3により着脱可能となっている。又、4は握り5に対して回転自在なフランジである。
【0005】
図7により前記コレットチャック部3を説明する。
【0006】
前記握り5の先端から所要深さの工具嵌入穴6が穿設され、又前記握り5の先端から軸心と平行なスリット(図示せず)が前記工具嵌入穴6の一部に穿設され、前記スリットにより3又は4の把持片7に分割されている。該把持片7の先端は凸テーパ形状となっており、該把持片7の基部には薄肉部を形成する溝8が円周方向に刻設されている。該溝8に連続して前記握り5にネック部9が形成され、該ネック部9には雄螺子11が刻設されている。
【0007】
前記ネック部9には有底筒状のキャップナット12が螺合する。
【0008】
該キャップナット12の先端部には通孔13が穿設され、該通孔13の内面は前記凸テーパ形状に契合する様に凹テーパ形状が形成されている。又、前記キャップナット12の開口端より雌螺子14が刻設されており、該雌螺子14が前記雄螺子11に螺合する。
【0009】
図6、図7の状態から前記工具部2を交換する場合、前記キャップナット12を緩め、該キャップナット12を図中左方向に移動させる。前記把持片7と前記キャップナット12とのテーパ部の契合が緩み、前記把持片7が弾性により広がり、前記工具部2を引抜くことができる。
【0010】
別の工具部2を取付ける場合は、前記把持片7が広がった状態で、別の工具部2を前記工具嵌入穴6に差込み、前記キャップナット12を締める。該キャップナット12と前記把持片7のテーパ部の作用により、該把持片7が径方向に縮小し、前記別の工具部2を把持する。
【0011】
而して、1つの握り部1に複数の工具部2が着脱でき、種類の異なる螺子に対応できる。
【0012】
【発明が解決しようとする課題】
上記した従来の工具部着脱式ドライバは、握り5、コレットチャック部3共に金属の機械加工品であり、製品コストが高い。又、工具部2に対する把持力は前記キャップナット12の締め具合によるので、呼び径の大きな螺子に対して使用する場合、強く締める必要があり、場合によっては強く締めても前記工具部2が回転してしまい、螺子の着脱に支障が生じる場合があった。
【0013】
本発明は斯かる実情に鑑み、簡単な構造とし、製作コストを低減し、而も確実に工具部を把持し、螺子の着脱作業が確実に行える工具部着脱式ドライバを提供するものである。
【0014】
【課題を解決するための手段】
本発明は、先端部が先細り形状をし、先端側からチャック保持孔が穿設された合成樹脂製の握りと、前記チャック保持孔に圧入された工具チャックと、該工具チャックに挿入引抜き可能な工具部から構成され、前記工具チャックは反圧入方向側の端部に握りの先端に向って先細り状に形成された弾性変位可能な片持梁状の複数の把持片と、前記チャック保持孔に圧入された圧入方向側の端部と、圧入方向側の端部に係合孔とが一体に形成され、前記工具部を前記工具チャックに挿入することで、前記把持片が弾性変位して前記工具部を保持すると共に前記工具部挿入側先端前記係合孔に嵌入し回止めされる工具部着脱式ドライバに係るものである。
【0015】
【発明の実施の形態】
以下、図面を参照しつつ本発明の実施の形態を説明する。
【0016】
図1、図2中、15は工具部、16は握り部、17はフランジを示している。
【0017】
前記握り部16は合成樹脂製の握り18と金属製の工具チャック19を有し、前記握り18の先端部は先細り形状をし、外周面には滑止めの筋目が形成されている。該握り18の先端側からチャック保持穴21が穿設され、該チャック保持穴21は前記工具チャック19の軸心方向の長さと同等の深さとなっている。
【0018】
前記チャック保持穴21に前記工具チャック19が圧入される。
【0019】
該工具チャック19は図3〜図5に示されている。該工具チャック19は弾性を有する金属材料から製作され、先端側から所要の深さで工具嵌入穴22が穿設され、基端側からはスリット孔23が穿設され、該スリット孔23は前記工具嵌入穴22に到達している。
【0020】
前記工具チャック19の先端側から十字のスリットが刻設され、前記工具チャック19の先端部には4の把持片24が形成されている。該把持片24の少なくとも先端の内径は前記工具部15の把持部の外径より小さくなっており、又前記把持片24が前記工具部15を把持した状態での前記把持片24の外径は前記チャック保持穴21の径より小さくなっている。而して、前記把持片24は前記工具部15の着脱に際して、前記チャック保持穴21内で自由に弾性変位が可能となっている。
【0021】
前記工具チャック19の基部はスプライン加工されており、軸心方向に延びる断面3角形の突条25が円周方向に所要のピッチで形成されている。前記工具チャック19が前記チャック保持穴21に圧入され、前記突条25が前記チャック保持穴21の内面に食込むことで大きな保持力が発揮される。
【0022】
前記工具部15の基端部26は漸次厚みが減少する平板テーパ形状となっており、該基端部26にはテーパ部27が連続している。前記基端部26は前記スリット孔23に挿入可能であり、前記テーパ部27は自由状態の前記把持片24の内縁に当接可能である。
【0023】
前記握り部16に前記工具部15を取付ける場合、該工具部15を基端から前記工具チャック19内に単に押込めばよい。
【0024】
前記工具部15を基端から前記工具嵌入穴22に挿入すると、前記テーパ部27が前記把持片24の内縁に当接し、楔効果により該把持片24が押広げられる。更に前記工具部15を押込むと、前記基端部26が前記スリット孔23に挿入される。尚、前記基端部26と前記スリット孔23の方向が一致しない場合は、前記工具部15を回転させればよい。前記基端部26は先細りとなっているので、容易に位置合せが可能である。
【0025】
前記基端部26が前記スリット孔23に嵌入されることで、前記工具部15は前記握り18に対して回転が拘束される。更に、前記基端部26が平板テーパ形状であることから、該基端部26を充分に前記スリット孔23に押込むことで、楔効果により前記基端部26と前記スリット孔23間のガタツキが完全に抑止される。
【0026】
前記工具部15と前記握り18とが一体となり、螺子の着脱が行える。又、前記握り18は先端が先細り形状であるので、狭小な場所でも作業が可能である。
【0027】
前記工具部15の交換は、該工具部15を引抜き、別の工具部15を差込めば完了する。
【0028】
尚、前記工具部15の抜差し方向の保持力は、前記把持片24の弾性力により発生する該把持片24と前記工具部15間の摩擦力となるが、螺子の着脱作業では前記工具部15に大きな引抜き力は作用せず、該工具部15が脱落しない程度の保持力でも充分である。従って、該工具部15の着脱作業は簡単に行える。
【0029】
尚、上記実施の形態で、前記工具チャック19の基部をスプライン加工したが、螺子の着脱に必要な回転拘束力が得られればよいので、単なる圧入でもよく、又、前記工具チャック19に軸心と平行な平面部を形成してもよく、又、該工具チャック19の基部を6角形状等の形状にしてもよい。
【0030】
又、前記把持片24は3又は5以上に分割してもよい。更に、前記基端部26の形状は6角形状等の角形状とし、前記スリット孔23も対応した6角形状等の角形状の係合孔とする等、嵌合により回止めされるものであればよい。
【0031】
【発明の効果】
以上述べた如く本発明によれば、合成樹脂製の握りと、該握りに圧入された工具チャックと、該工具チャックに挿入引抜き可能な工具部から構成され、前記工具チャックは先端部に前記工具部を弾性保持する複数の把持片を有し、基端には前記工具部が嵌入し回止めされる係合孔が形成された構成であり、握りが合成樹脂製であり、又工具チャックが圧入で組込まれるので、部品代、組立コストが安価となり、又工具部の着脱は工具部を抜差しするだけで極めて簡単に行える。更に、前記工具部と工具チャックとは機械的に回止めされるので、螺子の着脱作業が確実に行える等の優れた効果を発揮する。
【図面の簡単な説明】
【図1】本発明の実施の形態を示す正面図である。
【図2】同前本発明の実施の形態の要部を示す断面図である。
【図3】同前本発明の実施の形態で使用される工具チャックの正面図である。
【図4】該工具チャックの左側面図である。
【図5】該工具チャックの右側面図である。
【図6】従来例の正面図である。
【図7】従来例の要部断面図である。
【符号の説明】
15 工具部
16 握り部
18 握り
19 工具チャック
22 工具嵌入穴
23 スリット孔
24 把持片
26 基端部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tool part detachable driver whose tool part can be changed in accordance with the screw standard, and more particularly to a tool part detachable driver used for precision work.
[0002]
[Prior art]
Screwdrivers are widely used as tools for attaching and detaching screws, and instead of preparing drivers that meet various standards, multiple tool parts can be attached to and detached from one grip part, improving economy and versatility. There is a detachable screwdriver.
[0003]
A conventional tool part detachable driver will be described with reference to FIGS.
[0004]
In the figure, 1 is a gripping part, 2 is a tool part, and the gripping part 1 has a collet chuck part 3 at a tip part, and the tool part 2 is detachable by the collet chuck part 3. Reference numeral 4 denotes a flange that is rotatable with respect to the grip 5.
[0005]
The collet chuck portion 3 will be described with reference to FIG.
[0006]
A tool insertion hole 6 having a required depth is formed from the front end of the grip 5, and a slit (not shown) parallel to the shaft center is formed in a part of the tool insertion hole 6 from the front end of the grip 5. The slits are divided into 3 or 4 gripping pieces 7. The tip of the gripping piece 7 has a convex taper shape, and a groove 8 forming a thin portion is engraved in the circumferential direction at the base of the gripping piece 7. A neck portion 9 is formed in the grip 5 continuously from the groove 8, and a male screw 11 is engraved on the neck portion 9.
[0007]
A bottomed cylindrical cap nut 12 is screwed into the neck portion 9.
[0008]
A through hole 13 is formed at the tip of the cap nut 12, and the inner surface of the through hole 13 is formed with a concave taper shape so as to engage with the convex taper shape. A female screw 14 is engraved from the open end of the cap nut 12, and the female screw 14 is screwed into the male screw 11.
[0009]
When the tool part 2 is replaced from the state shown in FIGS. 6 and 7, the cap nut 12 is loosened, and the cap nut 12 is moved in the left direction in the figure. The engagement of the tapered portion between the gripping piece 7 and the cap nut 12 is loosened, the gripping piece 7 is expanded by elasticity, and the tool portion 2 can be pulled out.
[0010]
When attaching another tool part 2, with the gripping piece 7 spread, another tool part 2 is inserted into the tool insertion hole 6 and the cap nut 12 is tightened. By the action of the cap nut 12 and the tapered portion of the gripping piece 7, the gripping piece 7 is contracted in the radial direction and grips the another tool part 2.
[0011]
Thus, a plurality of tool parts 2 can be attached to and detached from one grip part 1 and can cope with different types of screws.
[0012]
[Problems to be solved by the invention]
The conventional tool part detachable driver described above is a metal machined product in which the grip 5 and the collet chuck part 3 are both high in product cost. Further, since the gripping force with respect to the tool portion 2 depends on the tightening degree of the cap nut 12, when used with a screw having a large nominal diameter, it is necessary to tighten it tightly. As a result, there may be a problem in the screw attachment / detachment.
[0013]
In view of such circumstances, the present invention provides a tool part attachment / detachment type screwdriver that has a simple structure, reduces manufacturing costs, reliably holds the tool part, and can reliably attach and detach the screw.
[0014]
[Means for Solving the Problems]
The present invention provides a synthetic resin grip having a tip portion tapered and a chuck holding hole drilled from the tip side, a tool chuck press-fitted into the chuck holding hole , and an insertable / removable tool chuck. The tool chuck is composed of a plurality of elastically displaceable cantilevered gripping pieces formed in a tapered shape toward the tip of the grip at the end of the counter press-fitting direction, and the chuck holding hole. The press- fitting direction end and the press-fitting direction end are integrally formed with an engagement hole, and by inserting the tool part into the tool chuck, the gripping piece is elastically displaced and the the tool unit insertion side leading end co holding the tool part in which is related to the engaging fitted into Goana turn stop is Ru Engineering tool unit detachable driver.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
1 and 2, reference numeral 15 denotes a tool part, 16 denotes a grip part, and 17 denotes a flange.
[0017]
The grip portion 16 has a synthetic resin grip 18 and a metal tool chuck 19, the tip end portion of the grip 18 is tapered, and non-slip lines are formed on the outer peripheral surface. A chuck holding hole 21 is formed from the front end side of the grip 18, and the chuck holding hole 21 has a depth equivalent to the length of the tool chuck 19 in the axial direction.
[0018]
The tool chuck 19 is press-fitted into the chuck holding hole 21.
[0019]
The tool chuck 19 is shown in FIGS. The tool chuck 19 is made of a metal material having elasticity, a tool insertion hole 22 is drilled at a required depth from the distal end side, and a slit hole 23 is drilled from the proximal end side. The tool insertion hole 22 is reached.
[0020]
A cross-shaped slit is formed from the front end side of the tool chuck 19, and four gripping pieces 24 are formed at the front end portion of the tool chuck 19. The inner diameter of at least the tip of the gripping piece 24 is smaller than the outer diameter of the gripping portion of the tool portion 15, and the outer diameter of the gripping piece 24 in a state where the gripping piece 24 grips the tool portion 15 is It is smaller than the diameter of the chuck holding hole 21. Thus, the grip piece 24 can be freely elastically displaced in the chuck holding hole 21 when the tool portion 15 is attached or detached.
[0021]
The base portion of the tool chuck 19 is splined, and a triangular protrusion 25 having a triangular cross section extending in the axial direction is formed at a required pitch in the circumferential direction. The tool chuck 19 is press-fitted into the chuck holding hole 21, and the protrusion 25 bites into the inner surface of the chuck holding hole 21 so that a large holding force is exhibited.
[0022]
The base end portion 26 of the tool portion 15 has a flat plate taper shape in which the thickness gradually decreases, and a taper portion 27 is continuous with the base end portion 26. The base end portion 26 can be inserted into the slit hole 23, and the tapered portion 27 can abut on the inner edge of the gripping piece 24 in a free state.
[0023]
When attaching the tool part 15 to the grip part 16, the tool part 15 may be simply pushed into the tool chuck 19 from the base end.
[0024]
When the tool portion 15 is inserted into the tool insertion hole 22 from the base end, the tapered portion 27 comes into contact with the inner edge of the grip piece 24, and the grip piece 24 is expanded by the wedge effect. When the tool portion 15 is further pushed in, the base end portion 26 is inserted into the slit hole 23. In addition, what is necessary is just to rotate the said tool part 15, when the directions of the said base end part 26 and the said slit hole 23 do not correspond. Since the base end portion 26 is tapered, it can be easily aligned.
[0025]
As the base end portion 26 is fitted into the slit hole 23, the rotation of the tool portion 15 is restricted with respect to the grip 18. Further, since the base end portion 26 has a flat taper shape, when the base end portion 26 is sufficiently pushed into the slit hole 23, a rattling between the base end portion 26 and the slit hole 23 is caused by a wedge effect. Is completely deterred.
[0026]
The tool portion 15 and the grip 18 are integrated, and a screw can be attached and detached. Further, since the grip 18 has a tapered tip, it can be operated even in a narrow place.
[0027]
The replacement of the tool portion 15 is completed when the tool portion 15 is pulled out and another tool portion 15 is inserted.
[0028]
The holding force in the insertion / removal direction of the tool portion 15 is a frictional force between the grip piece 24 and the tool portion 15 generated by the elastic force of the grip piece 24. In addition, a large pulling force does not act, and a holding force sufficient to prevent the tool portion 15 from falling off is sufficient. Therefore, the attaching / detaching work of the tool portion 15 can be easily performed.
[0029]
In the above embodiment, the base portion of the tool chuck 19 is splined. However, since it is sufficient to obtain a rotational restraining force necessary for attaching and detaching the screw, simple press-fitting may be used. A plane portion parallel to the shape of the tool chuck 19 may be formed, and the base portion of the tool chuck 19 may have a hexagonal shape or the like.
[0030]
The grip piece 24 may be divided into 3 or 5 or more. Further, the shape of the base end portion 26 is a hexagonal shape and the like, and the slit hole 23 is also a hexagonal engagement hole such as a corresponding hexagonal shape, so that it is stopped by fitting. I just need it.
[0031]
【The invention's effect】
As described above, according to the present invention, it is composed of a synthetic resin grip, a tool chuck press-fitted into the grip, and a tool portion that can be inserted into and pulled out from the tool chuck. The base end has a plurality of gripping pieces, and the base end is formed with an engagement hole into which the tool portion is fitted and stopped, the grip is made of synthetic resin, and the tool chuck is Since it is assembled by press-fitting, the parts cost and assembly cost are reduced, and the attachment / detachment of the tool part can be performed very simply by simply inserting and removing the tool part. Furthermore, since the tool portion and the tool chuck are mechanically stopped, an excellent effect such that the screw can be attached and detached reliably is exhibited.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the main part of the embodiment of the present invention.
FIG. 3 is a front view of a tool chuck used in the embodiment of the present invention.
FIG. 4 is a left side view of the tool chuck.
FIG. 5 is a right side view of the tool chuck.
FIG. 6 is a front view of a conventional example.
FIG. 7 is a cross-sectional view of a main part of a conventional example.
[Explanation of symbols]
15 Tool part 16 Grip part 18 Grip 19 Tool chuck 22 Tool insertion hole 23 Slit hole 24 Grip piece 26 Base end part

Claims (1)

先端部が先細り形状をし、先端側からチャック保持孔が穿設された合成樹脂製の握りと、前記チャック保持孔に圧入された工具チャックと、該工具チャックに挿入引抜き可能な工具部から構成され、前記工具チャックは反圧入方向側の端部に握りの先端に向って先細り状に形成された弾性変位可能な片持梁状の複数の把持片と、前記チャック保持孔に圧入された圧入方向側の端部と、圧入方向側の端部に係合孔とが一体に形成され、前記工具部を前記工具チャックに挿入することで、前記把持片が弾性変位して前記工具部を保持すると共に前記工具部挿入側先端前記係合孔に嵌入し回止めされることを特徴とする工具部着脱式ドライバ。 Consists of a synthetic resin grip with a tapered tip and a chuck holding hole drilled from the tip, a tool chuck press-fitted into the chuck holding hole , and a tool part that can be inserted into and removed from the tool chuck. The tool chuck has a plurality of elastically displaceable cantilever-shaped gripping pieces tapered toward the gripping tip at the end on the side opposite to the press-fitting direction, and press-fitting press-fitted into the chuck holding hole. An engagement hole is integrally formed at the end portion on the direction side and the end portion on the press-fitting direction side , and the gripping piece is elastically displaced to hold the tool portion by inserting the tool portion into the tool chuck. then the tool unit detachable driver, wherein the benzalkonium the tool unit insertion side leading end is fitted with rotation prevention in the engaging hole co.
JP2002141788A 2002-05-16 2002-05-16 Tool part removable driver Expired - Lifetime JP3671166B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002141788A JP3671166B2 (en) 2002-05-16 2002-05-16 Tool part removable driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002141788A JP3671166B2 (en) 2002-05-16 2002-05-16 Tool part removable driver

Publications (2)

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JP2003334767A JP2003334767A (en) 2003-11-25
JP3671166B2 true JP3671166B2 (en) 2005-07-13

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JP2008183648A (en) * 2007-01-29 2008-08-14 Takubo Seiki Seisakusho:Kk Reamer and hand reamer

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