JP2003231065A - Bolt fastener - Google Patents
Bolt fastenerInfo
- Publication number
- JP2003231065A JP2003231065A JP2002032409A JP2002032409A JP2003231065A JP 2003231065 A JP2003231065 A JP 2003231065A JP 2002032409 A JP2002032409 A JP 2002032409A JP 2002032409 A JP2002032409 A JP 2002032409A JP 2003231065 A JP2003231065 A JP 2003231065A
- Authority
- JP
- Japan
- Prior art keywords
- shaft member
- output shaft
- clutch spring
- screw tightening
- drive shaft
- 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.)
- Granted
Links
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、天井や壁に使用す
る石膏ボード等にねじ締め作業を行う際に用いられるね
じ締め装置（主に電動スクリュードライバ）に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw tightening device (mainly an electric screwdriver) used for screwing a gypsum board used for a ceiling or a wall.
【０００２】[0002]
【従来の技術】電動スクリュードライバ等のねじ締め装
置は、主に石膏ボード等の被締付材料を対象に使用され
る。このねじ締め装置は、ねじ締め作業の場合、ねじ締
めの深さ位置を一定の深さにする必要があるため、本体
の一部に軸方向移動調節可能なストッパを設け、ねじ締
め作業中にストッパが被締結部材に当接する位置まで本
体が移動すると、クラッチの遮断動作を行うねじ締め深
さの調節機構が設けられている。一方、逆回転時のねじ
緩め作業の場合、ワンウェイクラッチにより動力が伝達
される機構が設けられている。2. Description of the Related Art Screw tightening devices such as electric screwdrivers are mainly used for materials to be tightened such as gypsum board. This screw tightening device requires a fixed depth in the screw tightening position for screw tightening work.Therefore, a stopper that allows axial movement adjustment is provided on a part of the body to prevent screw tightening during the screw tightening work. A mechanism for adjusting the screw tightening depth is provided that performs a clutch disengagement operation when the main body moves to a position where the stopper contacts the member to be fastened. On the other hand, in the case of screw loosening work at the time of reverse rotation, a mechanism for transmitting power by a one-way clutch is provided.
【０００３】従来のねじ締め装置の一例である特開平８
−２６７３６７号公報に開示されているねじ締め装置を
図１を用いて以下説明する。Japanese Unexamined Patent Publication No. Hei 8 (1998), which is an example of a conventional screw tightening device.
The screw tightening device disclosed in Japanese Patent No. 267367 will be described below with reference to FIG.
【０００４】図１において、ねじ締め装置のハウジング
２の先端にはストッパスリーブ３がねじ嵌合し取付けら
れている。ハウジング２に対してストッパスリーブ３を
回転させることにより、ストッパスリーブ３とハウジン
グ２との相対距離を調節することができ、これによりね
じ送り距離（ねじ締込み深さ）が調節可能となる。In FIG. 1, a stopper sleeve 3 is screwed and attached to the tip of a housing 2 of the screw tightening device. By rotating the stopper sleeve 3 with respect to the housing 2, the relative distance between the stopper sleeve 3 and the housing 2 can be adjusted, whereby the screw feed distance (screw tightening depth) can be adjusted.
【０００５】ハウジング２内では図示省略のモータの出
力軸に取付けられたピニオン１９が駆動軸部材４の外周
に設けられたギヤ５と噛み合っており、駆動軸部材４と
ギヤ５とは回転方向に一体であるため、ギヤ５を介して
モータの回転が駆動軸部材４に伝達される。In the housing 2, a pinion 19 attached to an output shaft of a motor (not shown) meshes with a gear 5 provided on the outer periphery of the drive shaft member 4, so that the drive shaft member 4 and the gear 5 rotate in the rotational direction. Since they are integrated, the rotation of the motor is transmitted to the drive shaft member 4 via the gear 5.
【０００６】圧縮ばねであるクラッチスプリング６は図
２に示すように左巻きで、上方端部と下方端部が軸方向
に延びた形状をしている。As shown in FIG. 2, the clutch spring 6 which is a compression spring is left-handed, and has an upper end portion and a lower end portion which extend in the axial direction.
【０００７】係合ボール１８を有し、係合ボール１８に
よってビット１０を一体回転可能に収納する出力軸部材
７は、メタル部８によって回動及び軸方向移動可能に支
持されると共にビット１０側への移動位置が規制されて
いる。また、出力軸部材７は駆動軸部材４の駆動軸側ス
リーブ４ａ内に保持されたワンウェイクラッチ１６内に
位置する部分を持ち、出力軸部材７はワンウェイクラッ
チ１６内を軸方向移動可能であると共に、ワンウェイク
ラッチ１６の作用によってワンウェイクラッチ１６に対
して一方向（ねじ締め方向）にのみ回動可能となってい
る。The output shaft member 7 having the engaging balls 18 and accommodating the bit 10 integrally rotatably by the engaging balls 18 is rotatably and axially movably supported by the metal portion 8 and at the bit 10 side. The movement position to is restricted. Further, the output shaft member 7 has a portion located in the one-way clutch 16 held in the drive shaft side sleeve 4a of the drive shaft member 4, and the output shaft member 7 is movable in the one-way clutch 16 in the axial direction. The action of the one-way clutch 16 allows the one-way clutch 16 to rotate only in one direction (screw tightening direction).
【０００８】ストッパスリーブ３の駆動軸部材４側端部
には、回転不能かつ軸方向移動可能に設けられ、圧縮ば
ね１１によりストッパスリーブ３側に常時付勢されたロ
ック部材１２が当接しており、通常時にはストッパスリ
ーブ３とロック部材１２の当接部に両者に対して互いに
噛み合うよう設けられた凹凸状の爪部が係合している。
従って、ストッパスリーブ３の爪部とロック部材１２の
爪部とが噛み合っている状態では、ストッパスリーブ３
はハウジング２に対して回転不能であり、軸方向位置が
固定されている。なお、ねじ締込み深さの調整は、操作
者がロック部材１２を圧縮ばね１１に抗して駆動軸部材
４側に摺動させ、ストッパスリーブ３とロック部材１２
の爪部との係合を解除した状態でハウジング２に対して
ストッパスリーブ３を回転させることにより行うことが
できる。A lock member 12 is provided at the end of the stopper sleeve 3 on the side of the drive shaft member 4 so as to be non-rotatable and axially movable, and is in constant contact with the stopper member 3 by a compression spring 11. Normally, the abutting portions of the stopper sleeve 3 and the lock member 12 are engaged with the concave and convex claw portions provided so as to mesh with each other.
Therefore, when the claw portion of the stopper sleeve 3 and the claw portion of the lock member 12 are engaged with each other, the stopper sleeve 3
Is not rotatable with respect to the housing 2 and its axial position is fixed. To adjust the screw tightening depth, the operator slides the lock member 12 toward the drive shaft member 4 side against the compression spring 11 to move the stopper sleeve 3 and the lock member 12 together.
This can be done by rotating the stopper sleeve 3 with respect to the housing 2 in a state in which the engagement with the claw portion of the is released.
【０００９】出力軸部材７の反ビット１０側端部には駆
動軸部材４内に軸方向移動可能に設けられた傘状部材１
３が当接されており、この傘状部材１３の外周のテーパ
ー部１３ａには駆動軸側スリーブ４ａに設けられた貫通
孔４ｂ内に半径方向に移動可能に設けられたボール９が
当接しており、また傘状部材１３はスプリング１５によ
って常時出力軸部材７側に押圧されている。An umbrella-shaped member 1 is provided in the drive shaft member 4 at the end of the output shaft member 7 opposite to the bit 10 so as to be movable in the axial direction.
3 is in contact with the taper portion 13a on the outer periphery of the umbrella-shaped member 13, and a ball 9 provided in the through hole 4b provided in the drive shaft side sleeve 4a so as to be movable in the radial direction is in contact with the tapered portion 13a. Further, the umbrella-shaped member 13 is constantly pressed by the spring 15 toward the output shaft member 7 side.
【００１０】図１に示す状態では、ビット１０及び出力
軸部材７は傘状部材１３を介してスプリング１５の押圧
力により、図示下方に移動し、ビット１０先端部はスト
ッパスリーブ３先端よりも突出した状態にある。In the state shown in FIG. 1, the bit 10 and the output shaft member 7 move downward in the drawing by the pressing force of the spring 15 via the umbrella-shaped member 13, and the tip of the bit 10 projects beyond the tip of the stopper sleeve 3. It is in the state of having done.
【００１１】この状態からねじ締め作業を開始すること
により、ビット１０及び出力軸部材７は傘状部材１３を
介してスプリング１５の押圧力に抗しながら図示上方に
軸方向移動する。By starting the screw tightening work from this state, the bit 10 and the output shaft member 7 axially move upward in the drawing against the pressing force of the spring 15 via the umbrella-shaped member 13.
【００１２】このようにビット１０及び出力軸部材７が
軸方向に移動すると、出力軸部材７から離れるに従って
徐々に外径寸法が小さくなるよう傾斜した傘状部材１３
のテーパー部１３ａによって、テーパー部１３ａに当接
しているボール９は駆動軸側スリーブ４ａ外周に突出す
る。When the bit 10 and the output shaft member 7 are moved in the axial direction in this way, the umbrella-shaped member 13 is inclined so that the outer diameter is gradually reduced as the bit 10 and the output shaft member 7 move away from the output shaft member 7.
The tapered portion 13a causes the ball 9 that is in contact with the tapered portion 13a to protrude to the outer periphery of the drive shaft side sleeve 4a.
【００１３】なお、出力軸部材７には駆動軸側スリーブ
４ａとほぼ同寸法の外径を有する出力軸側スリーブ７ａ
が設けられており、この出力軸側スリーブ７ａには、出
力軸側スリーブ７ａ及び駆動軸側スリーブ４ａ外周上に
位置するクラッチスプリング６の一端部を固定する固定
部１４ａ及びクラッチスプリング６端面と当接しクラッ
チスプリング６の軸方向の位置を規制する出力軸側スリ
ーブ７ａ外周上にに突出した突出部１４ｂが設けられて
いる。また、クラッチスプリング６の固定部１４ａに固
定される端部は図２及び図３に示すように折り曲げられ
ており、これによって軸方向移動不能に取付けられてい
る。The output shaft member 7 has an output shaft side sleeve 7a having an outer diameter substantially the same as that of the drive shaft side sleeve 4a.
The output shaft side sleeve 7a is provided with a fixing portion 14a for fixing one end portion of the clutch spring 6 located on the outer circumference of the output shaft side sleeve 7a and the drive shaft side sleeve 4a and an end surface of the clutch spring 6 and the end portion. A protrusion 14b is provided that is in contact with the output shaft side sleeve 7a and regulates the axial position of the clutch spring 6. Further, the end portion of the clutch spring 6 fixed to the fixing portion 14a is bent as shown in FIGS. 2 and 3, so that the clutch spring 6 is mounted so as not to move in the axial direction.
【００１４】クラッチスプリング６の駆動軸部材４側の
端部６ａは自由端となっており、ビット１０及び出力軸
部材７が軸方向に移動する際には連動して軸方向に移動
する。The end 6a of the clutch spring 6 on the drive shaft member 4 side is a free end, and when the bit 10 and the output shaft member 7 move in the axial direction, they move in the axial direction in conjunction with each other.
【００１５】ねじ締め付け作業時には、ビット１０及び
出力軸部材７がスプリング１５に抗して軸方向移動する
と、クラッチスプリング６の駆動軸部材４側の端部６ａ
は出力軸部材７に連動して軸方向移動し、ボール９の外
周上に位置する。このビット１０及び出力軸部材７の移
動と共に傘状部材１３が軸方向移動し、傘状部材１３の
テーパー部１３ａの作用によってボール９は駆動軸側ス
リーブ４ａの外周上に突出する。このため、クラッチス
プリング６の駆動軸部材４側の端部６ａとボール９とは
駆動軸部材４の回転方向において当接し、モータの回転
力がギヤ５、駆動軸部材４、ボール９を介してクラッチ
スプリング６に伝達される。During the screw tightening work, when the bit 10 and the output shaft member 7 move axially against the spring 15, the end portion 6a of the clutch spring 6 on the drive shaft member 4 side.
Moves axially in association with the output shaft member 7 and is located on the outer circumference of the ball 9. As the bit 10 and the output shaft member 7 move, the umbrella-shaped member 13 moves in the axial direction, and the ball 9 projects onto the outer periphery of the drive shaft-side sleeve 4a by the action of the tapered portion 13a of the umbrella-shaped member 13. For this reason, the end portion 6a of the clutch spring 6 on the drive shaft member 4 side and the ball 9 abut in the rotation direction of the drive shaft member 4, and the rotational force of the motor passes through the gear 5, the drive shaft member 4, and the ball 9. It is transmitted to the clutch spring 6.
【００１６】クラッチスプリング６はモータが正回転で
ある時には、外径寸法を小さくするよう変形し、駆動軸
側スリーブ７ａ外周及び出力軸側スリーブ４ａ外周上に
巻き付き、両者部材を一体に回転させるよう働き、これ
によって駆動軸部材４の回転力がクラッチスプリング６
を介して出力軸部材７に伝達され、ビット１０が回転し
てねじ締め作業が行われる。When the motor is rotating normally, the clutch spring 6 is deformed so as to reduce the outer diameter dimension, and is wound around the outer circumference of the drive shaft side sleeve 7a and the outer circumference of the output shaft side sleeve 4a to rotate both members integrally. This causes the rotational force of the drive shaft member 4 to be applied to the clutch spring 6
Is transmitted to the output shaft member 7 via the, and the bit 10 rotates to perform screw tightening work.
【００１７】なお、ねじ締め付け作業が進むと、ストッ
パスリーブ１３の端面が被締付部材に当接するが、その
ねじが締めつけられるに伴って、ビット１０及び出力軸
部材７はスプリング１５の押圧力によってビット１０先
端側に軸方向移動する。ビット１０及び出力軸部材７が
ビット１０先端側に所定量移動した際に傘状部材１３の
テーパー部１３ａに当接し駆動軸側スリーブ４ａ外周上
に突出していたボール９が突出しなくなる。これによっ
てクラッチスプリング６の駆動軸側スリーブ４ａ外周上
及び出力軸側スリーブ７ａ外周上への巻き付きが解除さ
れ、出力軸部材７及びビット１０の回転伝達が遮断さ
れ、ねじ締め作業が終了する。As the screw tightening work progresses, the end surface of the stopper sleeve 13 comes into contact with the member to be tightened. As the screw is tightened, the bit 10 and the output shaft member 7 are pressed by the spring 15. The bit 10 moves axially toward the tip side. When the bit 10 and the output shaft member 7 move toward the tip side of the bit 10 by a predetermined amount, the ball 9 that comes into contact with the tapered portion 13a of the umbrella-shaped member 13 and projects on the outer periphery of the drive shaft side sleeve 4a does not project. This releases the winding of the clutch spring 6 on the outer circumference of the drive shaft side sleeve 4a and the outer circumference of the output shaft side sleeve 7a, interrupts the rotation transmission of the output shaft member 7 and the bit 10, and completes the screw tightening operation.
【００１８】[0018]
【発明が解決しようとする課題】上記したような従来の
ねじ締め装置は、ねじ締め付け作業の終了を出力軸部材
７及び傘状部材１３の軸方向移動によりボール９を沈下
させることにより行う構造であるが、クラッチスプリン
グ６の一端部６ａは出力軸部材７の固定部１４ａに係止
されているため、出力軸部材７の移動に伴ってクラッチ
スプリング６が出力軸側スリーブ７ａ上で軸方向に移動
する。ボール９が沈下し回転動作が遮断されるとクラッ
チスプリング６は初期状態（コイル間が密着した状態）
に復帰するが、出力軸部材７の外周面の状態などにより
部分的にコイル間隔に隙間が生じるようにコイススプリ
ング６が変形してしまう、あるいはコイルスプリング６
端部が突出部１４ｂに当接しない状態（初期状態に戻ら
ない状態）となってしまう場合があり、図４に示すよう
にビット１０及び駆動軸部材４がスプリング１５に抗し
て軸方向移動していないにもかかわらずクラッチスプリ
ング６の駆動軸部材４側端部がボール９外周上に突出し
てしまう、あるいは図５に示すように正常な状態に比べ
クラッチスプリングの６の端部６ａが軸に対して傾く場
合がある。The above-described conventional screw tightening device has a structure in which the screw tightening operation is completed by sinking the ball 9 by axial movement of the output shaft member 7 and the umbrella-shaped member 13. However, since the one end portion 6a of the clutch spring 6 is locked to the fixed portion 14a of the output shaft member 7, the clutch spring 6 moves axially on the output shaft side sleeve 7a as the output shaft member 7 moves. Moving. When the ball 9 sinks and the rotation operation is interrupted, the clutch spring 6 is in the initial state (where the coils are in close contact).
However, due to the condition of the outer peripheral surface of the output shaft member 7 or the like, the coil spring 6 is deformed so that a gap is partially formed in the coil interval, or the coil spring 6 is deformed.
There is a case where the end portion does not come into contact with the protruding portion 14b (a state where it does not return to the initial state), and as shown in FIG. 4, the bit 10 and the drive shaft member 4 move axially against the spring 15. The end portion of the clutch spring 6 on the drive shaft member 4 side protrudes onto the outer periphery of the ball 9 even if the clutch spring 6 is not engaged, or as shown in FIG. May lean against.
【００１９】クラッチスプリング６の端部６ａが図４に
示すような状態でねじ締めを行うと、通常よりクラッチ
スプリング６の端部６ａが駆動側スリーブ４ａの奥まで
入り込むため、ねじ締め付け終了時、すなわち出力軸部
材７への回転伝達の遮断時にクラッチスプリング６の端
部６ａとボール９との当接が解除するタイミングが遅く
なり、ねじの締付け深さが設定より深くなってしまうと
いう問題があった。When the screw 6 is tightened with the end portion 6a of the clutch spring 6 as shown in FIG. 4, the end portion 6a of the clutch spring 6 enters deeper than the drive side sleeve 4a than usual, so that when the screw tightening is completed, That is, when the rotation transmission to the output shaft member 7 is interrupted, the timing at which the contact between the end portion 6a of the clutch spring 6 and the ball 9 is released becomes late, and the tightening depth of the screw becomes deeper than the setting. It was
【００２０】また、クラッチスプリング６が傾いた状態
でねじ締めを行うと、駆動軸側スリーブ４ａの溝内にク
ラッチスプリング６の端部６ａが噛み込んでしまい、出
力軸部材７への回転伝達が遮断できずに出力軸部材７及
びビット１０が回転し続ける現象（共回り）が発生する
という問題があった。If the screw is tightened while the clutch spring 6 is tilted, the end portion 6a of the clutch spring 6 will be caught in the groove of the drive shaft side sleeve 4a, and the rotation transmission to the output shaft member 7 will be transmitted. There is a problem in that a phenomenon (co-rotation) occurs in which the output shaft member 7 and the bit 10 continue to rotate without being shut off.
【００２１】本発明は、上記した欠点を解消し、クラッ
チスプリングが固定側の軸部材上で軸方向に移動するこ
とを防止することで、ねじの締込み過ぎや、共回り現象
が生じないねじ締め装置を提供することである。The present invention solves the above-mentioned drawbacks and prevents the clutch spring from moving in the axial direction on the fixed side shaft member, so that the screw is not over-tightened and the co-rotation phenomenon does not occur. To provide a fastening device.
【００２２】[0022]
【課題を解決するための手段】上記目的は、駆動装置か
らの動力を伝達する駆動軸部材と、ビットを保持し、軸
方向に移動可能に支持された出力軸部材と、出力軸部材
と駆動軸部材間とを互いに離隔させるよう作用する押圧
手段と、駆動軸部材と出力軸部材の同軸上に、各々の円
筒面にまたがってコイル状に配設され、出力軸部材及び
駆動軸部材のどちらか一方に一部が固定され、かつ他方
の部材に出力軸部材の移動に応じて係止可能なクラッチ
スプリングと、駆動軸部材と出力軸部材間に取付けられ
たワンウェイクラッチとを有するねじ締め装置であっ
て、クラッチスプリングの一部を固定する固定側の軸部
材外周に、クラッチスプリングの軸方向の移動を規制す
る凸部を設けることにより達成される。The above object is to provide a drive shaft member which transmits power from a drive device, an output shaft member which holds a bit and is movably supported in an axial direction, and an output shaft member and a drive unit. The pressing means that acts to separate the shaft members from each other and the driving shaft member and the output shaft member are coaxially arranged in a coil shape over each cylindrical surface. A screw tightening device having a clutch spring that is partially fixed to one side and that can be locked to the other side according to the movement of the output shaft side member, and a one-way clutch mounted between the drive shaft side member and the output shaft side member. This is achieved by providing a convex portion that restricts the movement of the clutch spring in the axial direction on the outer circumference of the fixed-side shaft member that fixes a part of the clutch spring.
【００２３】[0023]
【発明の実施の形態】本発明ねじ締め装置の一実施形態
を図１、図６及び図７を用いて以下説明する。なお、本
実施形態においては出力軸部材７以外の部分については
従来のねじ締め装置と同様の構成であるため、説明を省
略する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the screw tightening device of the present invention will be described below with reference to FIGS. 1, 6 and 7. In this embodiment, the parts other than the output shaft member 7 have the same structure as that of the conventional screw tightening device, and thus the description thereof will be omitted.
【００２４】図６は本発明ねじ締め装置を構成する出力
軸部材の一実施形態を示す斜視図、図７は図６のＡ−Ａ
線断面図、図８は本発明ねじ締め装置を構成する出力軸
部材の他の実施形態を示す斜視図である。FIG. 6 is a perspective view showing an embodiment of the output shaft member constituting the screw tightening device of the present invention, and FIG. 7 is a line AA of FIG.
FIG. 8 is a perspective view showing another embodiment of the output shaft member constituting the screw tightening device of the present invention.
【００２５】図６及び図７に示すようにクラッチスプリ
ング６の一端部を固定する出力軸部材７の出力軸側スリ
ーブ７ａ外周上には、クラッチスプリング６の一端部と
係合する固定壁１４ａ及びクラッチスプリング６の端部
が当接する突出部１４ｂが設けられていると共に、出力
軸側スリーブ７ａ上に突出すると共に軸方向に直交する
方向に延びる形状をした複数の凸部１７が設けられてい
る。As shown in FIGS. 6 and 7, on the outer circumference of the output shaft side sleeve 7a of the output shaft member 7 for fixing one end of the clutch spring 6, a fixed wall 14a engaging with one end of the clutch spring 6 is provided. A protrusion 14b with which the end of the clutch spring 6 abuts is provided, and a plurality of protrusions 17 that protrude on the output shaft side sleeve 7a and extend in the direction orthogonal to the axial direction are provided. .
【００２６】この凸部１７の間隔は、図７に示すように
クラッチスプリング６のコイル間に凸部１７が突出する
ように形成されており、これによって出力軸部材１７の
出力軸側スリーブ１７ａ上にクラッチスプリング６を配
置させた際には、凸部１７がクラッチスプリング６の軸
方向の位置を規制するよう働く。As shown in FIG. 7, the projections 17 are formed so that the projections 17 project between the coils of the clutch spring 6, and thereby the output shaft member 17 has a sleeve 17a on the output shaft side. When the clutch spring 6 is arranged in the clutch spring 6, the convex portion 17 functions to regulate the axial position of the clutch spring 6.
【００２７】このような構成とすることにより、ねじ締
め付け終了間際にビット１０及び出力軸部材７がスプリ
ング１５の押圧力により駆動軸部材４から離れる方向に
移動する際に、クラッチスプリング６が出力軸側スリー
ブ１７ａ上で軸方向に移動してしまうことを抑制するこ
とができ、出力軸側スリーブ１７ａ上においてクラッチ
スプリング６がコイル間隔が広がるように変形すること
及びクラッチスプリング６の端面が突出部１４ｂに当接
せずに軸に対して傾いてしまうことを防止することがで
きる。これによって、ねじの締込み過ぎや共回り現象の
発生を抑制することができると共に、次回のねじ締込み
時もクラッチスプリング６の端部６ａとボール９との当
接状況を安定させることができ、被締付材料へのねじ締
め作業を繰返し行った場合でも回転伝達遮断位置が一定
となり、ねじ締込み深さの精度を向上させることができ
るようになる。With this structure, when the bit 10 and the output shaft member 7 move in the direction away from the drive shaft member 4 due to the pressing force of the spring 15 just before the screw tightening is completed, the clutch spring 6 causes the output shaft member 6 to move. Axial movement on the side sleeve 17a can be suppressed, the clutch spring 6 is deformed on the output shaft side sleeve 17a so that the coil interval is widened, and the end surface of the clutch spring 6 is projected on the protruding portion 14b. It is possible to prevent tilting with respect to the shaft without coming into contact with the shaft. As a result, it is possible to prevent the screw from being overtightened and the co-rotation phenomenon from occurring, and to stabilize the contact state between the end 6a of the clutch spring 6 and the ball 9 even when the screw is tightened next time. Even if the screw tightening work is repeatedly performed on the material to be tightened, the rotation transmission cut-off position becomes constant, and the accuracy of the screw tightening depth can be improved.
【００２８】なお、上記実施形態では、出力軸側スリー
ブ７ａ上に突出する凸部１７を複数個設けた構成とし、
凸部１７に当接するクラッチスプリング６の一部の部分
に応力が集中することを抑制するようにしたが、凸部１
７を１個設けた構成としても、クラッチスプリング６が
出力軸側スリーブ１７ａ上で軸方向に移動してしまうこ
とを抑制することができるものである。In the above embodiment, a plurality of protrusions 17 protruding on the output shaft side sleeve 7a are provided,
Although the stress is prevented from concentrating on a part of the clutch spring 6 that comes into contact with the convex portion 17, the convex portion 1
Even with a configuration in which one clutch 7 is provided, it is possible to prevent the clutch spring 6 from moving axially on the output shaft side sleeve 17a.
【００２９】また、上記した凸部１７を図８に示すよう
にクラッチスプリング６と同形状の螺旋状に突出する形
状として、クラッチスプリング６と凸部１７との接触面
積を大きくする構成とすることも可能であり、この場合
には凸部１７に当接するクラッチスプリング６の一部に
応力が集中することを更に抑制することができるもので
ある。Further, as shown in FIG. 8, the above-mentioned convex portion 17 is formed in a spiral shape having the same shape as the clutch spring 6, so that the contact area between the clutch spring 6 and the convex portion 17 is increased. It is also possible, and in this case, it is possible to further suppress the concentration of stress on a part of the clutch spring 6 that comes into contact with the convex portion 17.
【００３０】なお、本実施形態では、正回転時に駆動軸
側部材４と出力軸部材７とを一体的に回転させるよう働
くクラッチスプリング６の端部を固定する固定側の軸部
材を出力軸部材７とし、出力軸部材７の軸方向移動に連
動してクラッチスプリング６の端部６ａと当接可能とな
るボール９を保持する軸部材を駆動軸側部材４とした
が、これらは逆の関係、すなわちクラッチスプリング６
の端部を固定する固定側の軸部材を駆動軸部材４とし、
ボール９を保持する部材を出力軸部材７としても良く、
この場合には駆動軸側スリーブ４ａ上に凸部１７を設け
て、クラッチスプリング６が駆動軸部材４の駆動軸側ス
リーブ４ａ上で軸方向に移動してしまうことを抑制する
構成となる。In this embodiment, the fixed shaft member for fixing the end portion of the clutch spring 6 that works to integrally rotate the drive shaft member 4 and the output shaft member 7 at the time of normal rotation is the output shaft member. 7, the shaft member that holds the ball 9 that can come into contact with the end portion 6a of the clutch spring 6 in conjunction with the axial movement of the output shaft member 7 is the drive shaft side member 4, but these have the opposite relationship. , Ie clutch spring 6
The shaft member on the fixed side for fixing the end portion of is the drive shaft member 4,
The member holding the ball 9 may be the output shaft member 7,
In this case, the convex portion 17 is provided on the drive shaft side sleeve 4a to prevent the clutch spring 6 from axially moving on the drive shaft side sleeve 4a of the drive shaft member 4.
【００３１】次に本発明ねじ締め装置の他の実施形態を
図９を用いて説明する。Next, another embodiment of the screw tightening device of the present invention will be described with reference to FIG.
【００３２】本実施形態は上記実施形態で出力軸部材７
が軸方向に移動した際にクラッチスプリング６の端部６
ａを駆動軸部材４に係止する手段として用いたボール９
及び傘状部材１３の変わりに、駆動軸部材４にクラッチ
スプリング６の端部６ａを収納可能かつクラッチスプリ
ング６が駆動軸部材４側に移動した際には端部６ａを挟
み込むことが可能なテーパー部４ｃを設けた構成をした
ものであるが、本発明はこのような構成をしたねじ締め
装置であっても採用可能である。In this embodiment, the output shaft member 7 is the same as the above embodiment.
End 6 of the clutch spring 6 when moving in the axial direction
Ball 9 used as means for locking a to the drive shaft member 4
And a taper capable of accommodating the end portion 6a of the clutch spring 6 in the drive shaft member 4 instead of the umbrella-shaped member 13 and sandwiching the end portion 6a when the clutch spring 6 moves to the drive shaft member 4 side. Although the configuration is such that the portion 4c is provided, the present invention can also be adopted in a screw tightening device having such a configuration.
【００３３】[0033]
【発明の効果】上記したように本発明によれば、駆動軸
部材と出力軸部材とを一体的に回転させるよう働くクラ
ッチスプリングの端部を固定する固定側の軸部材にクラ
ッチスプリングの軸方向移動を規制する凸部を設けたこ
とにより、ねじ締め作業でのねじ込み深さの精度の良い
ねじ締め装置を提供することができるようになる。As described above, according to the present invention, the axial direction of the clutch spring is fixed to the fixed side shaft member for fixing the end portion of the clutch spring which works to integrally rotate the drive shaft member and the output shaft member. By providing the convex portion that restricts the movement, it is possible to provide a screw tightening device with a high precision of the screwing depth in the screw tightening work.
【図１】従来のねじ締め装置の一例を示す要部拡大断面
図。FIG. 1 is an enlarged sectional view of an essential part showing an example of a conventional screw tightening device.
【図２】ねじ締め装置に使用されるクラッチスプリング
の一例を示す斜視図。FIG. 2 is a perspective view showing an example of a clutch spring used in the screw tightening device.
【図３】従来の出力軸部材にクラッチスプリングを固定
した状態を示す斜視図。FIG. 3 is a perspective view showing a state in which a clutch spring is fixed to a conventional output shaft member.
【図４】従来のねじ締め装置の一動作状態を示す要部拡
大断面図。FIG. 4 is an enlarged sectional view of an essential part showing one operating state of a conventional screw tightening device.
【図５】従来のねじ締め装置の一動作状態を示す要部拡
大断面図。FIG. 5 is an enlarged sectional view of an essential part showing one operating state of a conventional screw tightening device.
【図６】本発明ねじ締め装置を構成する出力軸部材の一
実施形態を示す斜視図。FIG. 6 is a perspective view showing an embodiment of an output shaft member that constitutes the screw tightening device of the present invention.
【図７】図６のＡ−Ａ線断面図。7 is a cross-sectional view taken along the line AA of FIG.
【図８】本発明ねじ締め装置を構成する出力軸部材の他
の実施形態を示す斜視図。FIG. 8 is a perspective view showing another embodiment of the output shaft member constituting the screw tightening device of the present invention.
【図９】本発明ねじ締め装置の他の実施形態を示す要部
拡大断面図。FIG. 9 is an enlarged sectional view of an essential part showing another embodiment of the screw tightening device of the present invention.
１はねじ締め装置、２はハウジング、３はストッパスリ
ーブ、４は駆動軸部材、４ａは駆動軸側スリーブ、４ｂ
は貫通孔、５はギヤ、６はクラッチスプリング、６ａは
クラッチスプリングの端部、７は出力軸部材、７ａは出
力軸側スリーブ、８はメタル部材、９はボール、１０は
ビット、１１は圧縮ばね、１２はロック部材、１３は傘
状部材、１４ａは固定部、１４ｂは突出部、１５はスプ
リング、１６はワンウェイクラッチ、１７は凸部、１８
は係合ボール、１９はピニオンである。1 is a screw fastening device, 2 is a housing, 3 is a stopper sleeve, 4 is a drive shaft member, 4a is a drive shaft side sleeve, and 4b.
Is a through hole, 5 is a gear, 6 is a clutch spring, 6a is an end of the clutch spring, 7 is an output shaft member, 7a is an output shaft side sleeve, 8 is a metal member, 9 is a ball, 10 is a bit, and 11 is a compression member. A spring, 12 is a lock member, 13 is an umbrella member, 14a is a fixed portion, 14b is a protruding portion, 15 is a spring, 16 is a one-way clutch, 17 is a convex portion, 18
Is an engaging ball, and 19 is a pinion.
Claims (4)
材と、ビットを保持し、軸方向に移動可能に支持された
出力軸部材と、前記出力軸部材と前記駆動軸部材間とを
互いに離隔させるよう作用する押圧手段と、前記駆動軸
部材と前記出力軸部材の同軸上に、各々の円筒面にまた
がってコイル状に配設され、前記出力軸部材及び前記駆
動軸部材のどちらか一方に一部が固定され、かつ他方の
部材に前記出力軸部材の移動に応じて係止可能なクラッ
チスプリングと、前記駆動軸部材と前記出力軸部材間に
取付けられたワンウェイクラッチとを有するねじ締め装
置であって、前記クラッチスプリングの一部を固定する
固定側の軸部材外周に、前記クラッチスプリングの軸方
向の移動を規制する凸部を設けたことを特徴とするねじ
締め装置。1. A drive shaft member that transmits power from a drive device, an output shaft member that holds a bit and is movably supported in the axial direction, and the output shaft member and the drive shaft member are mutually connected. A pressing means that acts to separate them from each other, and the driving shaft member and the output shaft member are coaxially arranged in a coil shape over each cylindrical surface, and either one of the output shaft member and the driving shaft member is provided. A screw fastening having a clutch spring partially fixed to the other member and capable of being locked to the other member according to the movement of the output shaft member, and a one-way clutch mounted between the drive shaft member and the output shaft member. A device for tightening a screw, wherein a convex portion for restricting axial movement of the clutch spring is provided on an outer periphery of a fixed-side shaft member that fixes a part of the clutch spring.
り、前記駆動軸部材には出力軸部材の軸方向移動に応じ
て半径方向に移動し、前記クラッチスプリングの端部と
当接可能なボールが保持されていることを特徴とする請
求項１記載のねじ締め装置。2. The fixed-side shaft member is an output shaft member, and the drive shaft member can move in the radial direction according to the axial movement of the output shaft member and can abut against the end of the clutch spring. 2. The screw tightening device according to claim 1, wherein various balls are held.
隔は前記クラッチスプリングのコイル間隔と同間隔に形
成されていることを特徴とする請求項１あるいは請求項
２記載のねじ締め装置。3. The screw tightening device according to claim 1 or 2, wherein a plurality of the convex portions are provided, and an interval between the convex portions is equal to a coil interval of the clutch spring. .
様の螺旋状に形成されていることを特徴とする請求項１
〜請求項３のいずれか１項記載のねじ締め装置。4. The convex portion is formed in the same spiral shape as that of the clutch spring.
~ The screw tightening device according to claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002032409A JP3716798B2 (en) | 2002-02-08 | 2002-02-08 | Screwing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002032409A JP3716798B2 (en) | 2002-02-08 | 2002-02-08 | Screwing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003231065A true JP2003231065A (en) | 2003-08-19 |
| JP3716798B2 JP3716798B2 (en) | 2005-11-16 |
Family
ID=27775539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002032409A Expired - Fee Related JP3716798B2 (en) | 2002-02-08 | 2002-02-08 | Screwing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3716798B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015058517A (en) * | 2013-09-19 | 2015-03-30 | 株式会社マキタ | Working tool |
| JP2017087369A (en) * | 2015-11-13 | 2017-05-25 | ロンシール工業株式会社 | Attachment for screw fastener, screw fastener, screw fastening fixation method, waterproof fixation method |
| US9815182B2 (en) | 2013-09-19 | 2017-11-14 | Makita Corporation | Power tool |
-
2002
- 2002-02-08 JP JP2002032409A patent/JP3716798B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015058517A (en) * | 2013-09-19 | 2015-03-30 | 株式会社マキタ | Working tool |
| US9815182B2 (en) | 2013-09-19 | 2017-11-14 | Makita Corporation | Power tool |
| JP2017087369A (en) * | 2015-11-13 | 2017-05-25 | ロンシール工業株式会社 | Attachment for screw fastener, screw fastener, screw fastening fixation method, waterproof fixation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3716798B2 (en) | 2005-11-16 |
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