JP2003136436A - Electrically-driven tool - Google Patents
Electrically-driven toolInfo
- Publication number
- JP2003136436A JP2003136436A JP2001333383A JP2001333383A JP2003136436A JP 2003136436 A JP2003136436 A JP 2003136436A JP 2001333383 A JP2001333383 A JP 2001333383A JP 2001333383 A JP2001333383 A JP 2001333383A JP 2003136436 A JP2003136436 A JP 2003136436A
- Authority
- JP
- Japan
- Prior art keywords
- bottomed hole
- output shaft
- elastic body
- socket
- opening
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ソケットを電動工
具本体の出力軸に着脱自在に取付ける電動工具に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power tool in which a socket is detachably attached to an output shaft of a power tool body.
【０００２】[0002]
【従来の技術】従来より、図８に示すように、ソケット
１を電動工具本体２の出力軸３に対して着脱自在に形成
し、複数種類のソケット１を必要に応じて適宜付け替え
ることで、複数種類のネジ等の固着具に対応することが
できる電動工具が広く用いられている。2. Description of the Related Art Conventionally, as shown in FIG. 8, a socket 1 is detachably formed on an output shaft 3 of an electric tool main body 2, and a plurality of types of sockets 1 can be replaced appropriately as needed. Electric tools that can handle a plurality of types of fasteners such as screws are widely used.
【０００３】この電動工具は、図９に示すように、ソケ
ット１の出力軸嵌入凹所１１に電動工具本体２の出力軸
３を嵌入し、出力軸３に軸方向と垂直な方向に穿孔して
ある貫通穴３１と、ソケット１の出力軸嵌入凹所１１の
両側壁に穿孔してある貫通穴１２’とを連通させ、これ
らの穴にピン３２を挿入するものである。ソケット１の
貫通穴１２’の外周にはゴムリング３３を被嵌してあ
り、挿入されたピン３２の抜け止めを行うものである
（ソケットの取付方式が「ピン方式」であるもの）。な
お、図中の１０は固着具が嵌入される凹所を示す。In this electric tool, as shown in FIG. 9, the output shaft 3 of the electric tool main body 2 is fitted in the output shaft fitting recess 11 of the socket 1, and the output shaft 3 is perforated in the direction perpendicular to the axial direction. The through-hole 31 and the through-holes 12 ′ formed in both side walls of the output shaft fitting recess 11 of the socket 1 are communicated with each other, and the pin 32 is inserted into these holes. A rubber ring 33 is fitted around the through hole 12 'of the socket 1 to prevent the inserted pin 32 from coming off (socket mounting method is "pin method"). In addition, reference numeral 10 in the drawing denotes a recess into which the fastener is fitted.
【０００４】このような電動工具においては、ソケット
１を取付けるのに、出力軸３をソケット１の出力軸嵌入
凹所１１に嵌入してソケットの貫通穴１２’と出力軸３
の貫通穴３１とを連通させてピン３２を挿入し、更にソ
ケット１の貫通穴１２’の外周にゴムリング３３を被嵌
するものであるため、この作業が煩雑で時間がかかるも
のであった。そこで、ソケット１を出力軸３に取付ける
作業が単純で時間のかからない電動工具が発明された。In such a power tool, when the socket 1 is mounted, the output shaft 3 is fitted into the output shaft fitting recess 11 of the socket 1 so that the through hole 12 'of the socket and the output shaft 3 are fitted.
Since the pin 32 is inserted in communication with the through hole 31 of No. 1 and the rubber ring 33 is fitted on the outer periphery of the through hole 12 'of the socket 1, this work is complicated and takes time. . Therefore, an electric tool has been invented in which the work of attaching the socket 1 to the output shaft 3 is simple and does not take much time.
【０００５】これは、図１０に示すように、出力軸３の
側面に軸方向と垂直な方向に有底穴４を穿設し、この有
底穴４の底４１にコイルばね５’を配置すると共に、コ
イルばね５’を配置した有底穴４のコイルばね５’の開
口４２側に押圧体６を配置し、コイルばね５’にて押圧
体６を有底穴４の開口４２縁にばね付勢するものである
（ソケットの取付方式が「ボールジョイント方式」であ
るもの）。なお、有底穴４は、図１０（ｄ）に示すよう
に、図９に示す出力軸３に穿設した貫通穴３１の一方の
開口を栓部材３０で閉塞して形成してもよい。As shown in FIG. 10, a bottomed hole 4 is formed in the side surface of the output shaft 3 in a direction perpendicular to the axial direction, and a coil spring 5'is arranged at the bottom 41 of the bottomed hole 4. In addition, the pressing body 6 is arranged on the side of the opening 42 of the coil spring 5'of the bottomed hole 4 in which the coil spring 5'is arranged, and the pressing body 6 is attached to the edge of the opening 42 of the bottomed hole 4 by the coil spring 5 '. It is spring-biased (socket mounting method is "ball joint method"). As shown in FIG. 10D, the bottomed hole 4 may be formed by closing one opening of the through hole 31 formed in the output shaft 3 shown in FIG. 9 with the plug member 30.
【０００６】押圧体６は、有底穴４に配置された際にこ
の有底穴４の開口４２の外方を向く面に、球面の一部を
なす球状面部６１が形成してある。有底穴４の開口４２
縁は、球状面部６１の外径よりも小径となるように形成
してあり、押圧体６が有底穴４から脱落しないようにし
てある。そして、有底穴４の底４１と押圧体６との間に
コイルばね５’を介在させることで、押圧体６を有底穴
４の開口４２縁にばね付勢する。開口４２縁にばね付勢
された押圧体６は、球状面部６１の頂央部６１ａが開口
４２縁の外側に位置するが、頂央部６１ａをばね力に抗
して有底穴４の内部方向に押すと、有底穴４内に収納さ
れるものである。The pressing body 6 has a spherical surface portion 61 forming a part of a spherical surface on the surface facing the outside of the opening 42 of the bottomed hole 4 when placed in the bottomed hole 4. Opening 42 of bottomed hole 4
The edge is formed so as to have a diameter smaller than the outer diameter of the spherical surface portion 61 so that the pressing body 6 does not fall out from the bottomed hole 4. By interposing the coil spring 5 ′ between the bottom 41 of the bottomed hole 4 and the pressing body 6, the pressing body 6 is spring-biased toward the edge of the opening 42 of the bottomed hole 4. In the pressing body 6 that is spring-biased to the edge of the opening 42, the apex center portion 61a of the spherical surface portion 61 is located outside the edge of the opening 42, but the apex center portion 61a resists the spring force and the inside of the bottomed hole 4 is prevented. When pushed in the direction, it is stored in the bottomed hole 4.
【０００７】ソケット１を出力軸３に取付けるには、ソ
ケット１の出力軸嵌入凹所１１に出力軸３を挿入し（図
１０（ａ）参照）、ソケット１の出力軸嵌入凹所１１の
開口縁部で出力軸３の有底穴４の開口４２の外側に位置
する押圧体６の頂央部６１ａを押し下げ（図１０（ｂ）
参照）、出力軸３をソケット１の出力軸嵌入凹所１１内
に完全に挿入すれば、出力軸３の有底穴４とソケット１
の凹部１２とが連通して押し下げられていた頂央部６１
ａが上がって凹部１２に嵌まり込み、ソケット１が出力
軸３にロックされる（図１０（ｃ）参照）。To attach the socket 1 to the output shaft 3, the output shaft 3 is inserted into the output shaft fitting recess 11 of the socket 1 (see FIG. 10A), and the opening of the output shaft fitting recess 11 of the socket 1 is opened. The top central portion 61a of the pressing body 6 located outside the opening 42 of the bottomed hole 4 of the output shaft 3 at the edge portion is pushed down (FIG. 10 (b)).
If the output shaft 3 is completely inserted into the output shaft fitting recess 11 of the socket 1, the bottomed hole 4 of the output shaft 3 and the socket 1 can be obtained.
Central part 61 that was pushed down in communication with the recess 12
a goes up and fits into the recess 12, and the socket 1 is locked to the output shaft 3 (see FIG. 10C).
【０００８】ソケット１を出力軸３より取外すには、ソ
ケット１と出力軸３とを引き離す方向に力を加え、ソケ
ット１の凹部１２の縁部で凹部１２に嵌り込んでいる押
圧体６の頂央部６１ａを押し下げれば、出力軸３をソケ
ット１から引き抜くことができる。In order to remove the socket 1 from the output shaft 3, a force is applied in a direction to separate the socket 1 and the output shaft 3, and the top of the pressing body 6 fitted in the recess 12 at the edge of the recess 12 of the socket 1. The output shaft 3 can be pulled out from the socket 1 by pushing down the central portion 61a.
【０００９】しかしながら、このようなソケット１及び
出力軸３を備えた電動工具にあっては、有底穴４内にコ
イルばね５’を介在させてあるので、押圧体６がばね力
に抗して有底穴４内に押されたり押圧体６を押す力が解
除されたりしてコイルばね５’が伸縮する際、コイルば
ね５’とソケット１の有底穴４の内側面４３とが摺れて
コイルばね５’が摩耗して損傷してしまい、押圧体６を
有底穴４の開口４２に弾圧できなくなるという問題があ
った。However, in the electric tool having the socket 1 and the output shaft 3 as described above, since the coil spring 5'is interposed in the bottomed hole 4, the pressing body 6 resists the spring force. When the coil spring 5 ′ expands or contracts due to being pushed into the bottomed hole 4 or the force pushing the pressing body 6 is released, the coil spring 5 ′ and the inner surface 43 of the bottomed hole 4 of the socket 1 slide. As a result, the coil spring 5 ′ is worn and damaged, and the pressing body 6 cannot be elastically pressed against the opening 42 of the bottomed hole 4.
【００１０】[0010]
【発明が解決しようとする課題】本発明は上記の点に鑑
みてなされたものであり、その目的とするところは、電
動工具本体の出力軸の有底穴に配置する弾性体が有底穴
の内側面と摺れて摩耗してしまうことのない電動工具を
提供することを課題とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide an elastic body disposed in a bottomed hole of an output shaft of an electric tool body with a bottomed hole. It is an object of the present invention to provide an electric power tool which is not worn by being slid on the inner surface of the machine.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するため
に本発明に係る電動工具は、ソケット１を電動工具本体
２の出力軸３に着脱自在に取付ける電動工具において、
出力軸３の側面に軸方向と垂直な方向に有底穴４を穿設
し、該有底穴４の底４１にゴムからなる伸縮自在な弾性
体５を配置し、有底穴４の開口４２側に該開口４２の外
方を向く面に球状面部６１を形成した押圧体６を配置
し、該押圧体６が有底穴４より脱落するのを阻止する押
圧体６の球状面部６１の外径よりも小さい内径の抜止開
口縁４２ａを有底穴４の開口４２縁に形成し、弾性体５
により押圧体６を抜止開口縁４２ａに弾圧して球状面部
６１の頂央部６１ａを有底穴４の開口４２の外方に位置
させ、前記頂央部６１ａがソケット１の出力軸嵌入凹所
１１の内側面に形成された凹部１２に嵌め込まれること
を特徴とするものである。このような構成とすること
で、出力軸３の有底穴４の底４１に配置する弾性体５を
ゴムで形成してあるため弾性体５と有底穴４の内側面４
３とが摺れても弾性体５が摩耗するのを抑えることがで
き、弾性体５が損傷して性能が劣化するのを防止するこ
とができる。In order to solve the above problems, an electric power tool according to the present invention is an electric power tool in which a socket 1 is detachably attached to an output shaft 3 of an electric power tool body 2.
A bottomed hole 4 is bored in a side surface of the output shaft 3 in a direction perpendicular to the axial direction, and a stretchable elastic body 5 made of rubber is arranged on a bottom 41 of the bottomed hole 4 to open the bottomed hole 4. The pressing body 6 having the spherical surface portion 61 formed on the surface facing the outside of the opening 42 is disposed on the 42 side, and the spherical surface portion 61 of the pressing body 6 that prevents the pressing body 6 from falling out of the bottomed hole 4 is provided. A retaining opening edge 42a having an inner diameter smaller than the outer diameter is formed at the edge of the opening 42 of the bottomed hole 4, and the elastic member 5
The pressing body 6 is elastically pressed against the retaining opening edge 42a to position the apex central portion 61a of the spherical surface portion 61 outside the opening 42 of the bottomed hole 4, and the apex central portion 61a is the recess for fitting the output shaft of the socket 1. It is characterized in that it is fitted in a recess 12 formed on the inner side surface of 11. With such a configuration, since the elastic body 5 arranged at the bottom 41 of the bottomed hole 4 of the output shaft 3 is made of rubber, the elastic body 5 and the inner surface 4 of the bottomed hole 4 are formed.
It is possible to prevent the elastic body 5 from being worn even if the elastic body 5 is slid, and to prevent the elastic body 5 from being damaged and deteriorating in performance.
【００１２】また、有底穴４の断面積の半分以上の断面
積を有し且つ、有底穴４に配置された際に該有底穴４の
内側面４３との間に隙間８が形成される弾性体５を用い
ることが好ましい。このような構成とすることで、弾性
体５が有底穴４の内側面４３に摺れて摩耗するのをより
一層抑えることが可能となる。Further, the cross-sectional area of the bottomed hole 4 is half or more, and the gap 8 is formed between the bottomed hole 4 and the inner side surface 43 of the bottomed hole 4 when it is arranged. It is preferable to use the elastic body 5 as described above. With such a configuration, it is possible to further prevent the elastic body 5 from sliding and wearing on the inner side surface 43 of the bottomed hole 4.
【００１３】また、弾性体５の有底穴４方向の中央部の
径ｄ1が前記方向の両端部の径ｄ2よりも小さいことが好
ましい。このような構成とすることで、弾性体５の中央
部と有底穴４の内側面４３との間に隙間８が形成できて
弾性体５が有底穴４の内側面４３に摺れて摩耗するのを
抑えることができるものでありながら、弾性体５の両端
部の径ｄ2は有底穴４の中程の部分とほぼ同じか若干小
さく形成してあるため、有底穴４内での倒れ等によって
弾性体５が有底穴４でこじれることなく安定性良く配置
することが可能となる。Further, it is preferable that the diameter d 1 of the central portion of the elastic body 5 in the direction of the bottomed hole 4 is smaller than the diameter d 2 of both ends in the direction. With such a configuration, the gap 8 can be formed between the central portion of the elastic body 5 and the inner side surface 43 of the bottomed hole 4, and the elastic body 5 slides on the inner side surface 43 of the bottomed hole 4. Although the wear can be suppressed, the diameter d 2 of both ends of the elastic body 5 is formed to be substantially the same as or slightly smaller than the middle portion of the bottomed hole 4, so that the inside of the bottomed hole 4 is The elastic body 5 can be arranged with good stability without being twisted in the bottomed hole 4 due to a fall or the like.
【００１４】また、複数の弾性体５を有底穴４方向に圧
接配置し、前記複数の弾性体５のうち少なくとも一つの
弾性体５は有底穴４の内側面４３との間に隙間８が形成
されることが好ましい。このような構成とすることで、
弾性体５と有底穴４の内側面４３との間に隙間８が形成
できて弾性体５が有底穴４の内側面４３に摺れて摩耗す
るのを抑えることができると共に、有底穴４内での倒れ
等によって弾性体５が有底穴４でこじれることなく安定
性良く配置することが可能となる。A plurality of elastic bodies 5 are arranged in pressure contact with each other in the direction of the bottomed hole 4, and at least one of the plurality of elastic bodies 5 has a gap 8 between the inner surface 43 of the bottomed hole 4. Are preferably formed. With this configuration,
A gap 8 can be formed between the elastic body 5 and the inner side surface 43 of the bottomed hole 4 to prevent the elastic body 5 from being slid and worn by the inner side surface 43 of the bottomed hole 4, It is possible to arrange the elastic body 5 with good stability without being twisted in the bottomed hole 4 due to tilting or the like in the hole 4.
【００１５】また、有底穴４の内側面４３との間に隙間
８が形成される弾性体５の硬度がそれ以外の弾性体５の
硬度よりも低いことが好ましい。このような構成とする
ことで、有底穴４の内側面４３に摺れて摩耗する惧れが
少ない弾性体５の硬度を下げて弾性係数を下げること
で、押圧体６が押し下げられた時の弾性体５の変形量を
大きくすることが可能となる。Further, it is preferable that the hardness of the elastic body 5 in which the gap 8 is formed between the elastic body 5 and the inner side surface 43 of the bottomed hole 4 is lower than the hardness of the other elastic bodies 5. With such a configuration, when the pressing body 6 is pushed down, the hardness of the elastic body 5 that is less likely to be worn by sliding on the inner surface 43 of the bottomed hole 4 is lowered to lower the elastic coefficient. It is possible to increase the deformation amount of the elastic body 5.
【００１６】また、弾性体５に有底穴４方向に貫通孔５
１を穿孔することが好ましい。このような構成とするこ
とで、弾性体５の圧縮変形を弾性体５の外方向のみにで
はなく内方向にも分散することができて、有底穴４内で
の倒れ等によって弾性体５が有底穴４でこじるれことな
く安定性良く配置することが可能となる。Further, the through hole 5 is formed in the elastic body 5 in the direction of the bottomed hole 4.
1 is preferably drilled. With such a configuration, the compressive deformation of the elastic body 5 can be dispersed not only in the outward direction of the elastic body 5 but also in the inward direction, and the elastic body 5 can be collapsed in the bottomed hole 4 or the like. Can be arranged with good stability without being twisted by the bottomed hole 4.
【００１７】また、本発明に係る電動工具は、ソケット
１を電動工具本体２の出力軸３に着脱自在に取付ける電
動工具において、出力軸３の側面に軸方向と垂直な方向
に有底穴４を穿設し、該有底穴４の底４１に斥力によっ
て互いに反発し合う磁石からなる一対の反発体７ａ，７
ｂを配置し、有底穴４の開口４２側に該開口４２の外方
を向く面に球状面部６１を形成した押圧体６を配置し、
該押圧体６が有底穴４より脱落するのを阻止する押圧体
６の球状面部６１の外径よりも小さい内径の抜止開口縁
４２ａを有底穴４の開口４２縁に形成し、反発体７によ
り押圧体６を抜止開口縁４２ａに弾圧して球状面部６１
の頂央部６１ａを有底穴４の開口４２の外方に位置さ
せ、前記頂央部６１ａがソケット１の出力軸嵌入凹所１
１の内側面に形成された凹部１２に嵌め込まれることを
特徴とするものである。このような構成とすることで、
押圧体６を有底穴４の抜止開口縁４２ａに弾圧する反発
体７ａ，７ｂを半永久的に使用することが可能となる。Further, the electric tool according to the present invention is an electric tool in which the socket 1 is detachably attached to the output shaft 3 of the electric tool main body 2, and a bottomed hole 4 is formed on a side surface of the output shaft 3 in a direction perpendicular to the axial direction. And a pair of repulsion members 7a, 7 made of magnets that repel each other on the bottom 41 of the bottomed hole 4 by a repulsive force.
b is arranged, and the pressing body 6 having the spherical surface portion 61 formed on the surface facing the outside of the opening 42 is arranged on the opening 42 side of the bottomed hole 4,
A stopper opening edge 42a having an inner diameter smaller than the outer diameter of the spherical surface portion 61 of the pressing body 6 for preventing the pressing body 6 from falling out of the bottomed hole 4 is formed on the edge of the opening 42 of the bottomed hole 4, and 7, the pressing body 6 is elastically pressed against the retaining opening edge 42a to make the spherical surface portion 61
Is located outside the opening 42 of the bottomed hole 4, and the top center portion 61a is the recess 1 for fitting the output shaft of the socket 1.
It is characterized in that it is fitted into a concave portion 12 formed on the inner side surface of 1. With this configuration,
It becomes possible to semi-permanently use the repulsion bodies 7a and 7b that elastically press the pressing body 6 against the retaining opening edge 42a of the bottomed hole 4.
【００１８】また、一対の反発体７ａ，７ｂの互いに対
向する面のうちの一方を凹面７１、他方を凸面７２とす
ることが好ましい。このような構成とすることで、反発
体７ａ，７ｂの対向する面積が増加して反発力を高める
ことができ、所定の反発力を生じる反発体７ａ，７ｂを
小型化することが可能となる。Further, it is preferable that one of the opposing surfaces of the pair of repulsion bodies 7a, 7b is a concave surface 71 and the other is a convex surface 72. With such a configuration, the opposing areas of the repulsion bodies 7a and 7b can be increased to increase the repulsion force, and the repulsion bodies 7a and 7b that generate a predetermined repulsion force can be downsized. .
【００１９】[0019]
【発明の実施の形態】以下、本発明を添付図面に示す実
施形態に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.
【００２０】本実施形態における電動工具は、出力軸が
突出した電動工具本体と、出力軸に着脱自在に取付ける
ソケットとで主体が構成され、複数種類のソケットを必
要に応じて適宜付け替えることで、複数種類のネジ等の
固着具に対応することができるものである。図８に電動
工具の全体図を示す。The electric power tool according to the present embodiment is mainly composed of an electric power tool body with an output shaft protruding and a socket detachably attached to the output shaft. By appropriately replacing a plurality of types of sockets, It is possible to handle a plurality of types of fasteners such as screws. FIG. 8 shows an overall view of the power tool.
【００２１】電動工具本体２は、図８に示すように、大
略筒状をしたケーシング部２１と、ケーシング部２１に
一体的に形成された把手部２２とで外殻が構成される。
ケーシング部２１内には、特に図示はしないが後述する
出力軸３を駆動させるための電源部や制御部やモーター
のような駆動部といった機器が収納され、把手部２２に
は、前記機器へ通電する電気を入切するスイッチが設け
られる。このような電動工具本体２には、駆動部に連結
される出力軸３がケーシング部２１の先端部より突出さ
れる。As shown in FIG. 8, the electric tool main body 2 has an outer shell composed of a substantially cylindrical casing portion 21 and a handle portion 22 formed integrally with the casing portion 21.
Although not shown in the drawings, devices such as a power supply unit for driving the output shaft 3 described later, a control unit, and a driving unit such as a motor are housed in the casing unit 21, and the grip unit 22 energizes the device. A switch for turning on and off electricity is provided. The output shaft 3 connected to the drive unit is projected from the tip of the casing 21 in the electric tool body 2.
【００２２】出力軸３は、図１に示すように、断面略円
形に形成され、ソケット１が取付けられてこのソケット
１に固着具（図示せず）が嵌め込まれ、駆動部からの駆
動力をソケット１を介して固着具に伝達するものであ
る。ソケット１にはそれぞれ、前端側にネジや釘といっ
た種々の固着具に応じた固着具嵌入孔（特に図示せず）
が穿設され、後端側に出力軸３に被嵌される出力軸嵌入
凹所１１が穿設される。なお、電動工具としては、出力
軸３に回転力を伝達するもの、あるいは、出力軸３に軸
方向の力（例えば衝撃力）を与えるもの等、特に限定さ
れない。As shown in FIG. 1, the output shaft 3 is formed to have a substantially circular cross section, the socket 1 is attached thereto, and a fixing member (not shown) is fitted into the socket 1 so that the driving force from the driving portion is applied. It is transmitted to the fixture via the socket 1. The socket 1 has fastener fitting holes (not particularly shown) corresponding to various fasteners such as screws and nails on the front end side.
And an output shaft fitting recess 11 to be fitted on the output shaft 3 is formed on the rear end side. The electric power tool is not particularly limited, such as one that transmits a rotational force to the output shaft 3 or one that applies an axial force (for example, an impact force) to the output shaft 3.
【００２３】以下に、ソケット１の出力軸３への取付け
について説明する。The attachment of the socket 1 to the output shaft 3 will be described below.
【００２４】出力軸３には、側面に出力軸３方向と垂直
な方向に有底穴４が穿設してある。有底穴４は、穿設方
向に垂直な断面が略円形状をした円筒内側面状のもので
ある。有底穴４の開口４２縁には、後述するが、有底穴
４の中程の円筒内側面状の部分よりも径を絞った抜止開
口縁４２ａが形成してある。このような有底穴４の底４
１には、伸縮自在な弾性体５ａが配置される。The output shaft 3 has a bottomed hole 4 on its side surface in a direction perpendicular to the direction of the output shaft 3. The bottomed hole 4 is a cylindrical inner side surface having a substantially circular cross section perpendicular to the drilling direction. As will be described later, at the edge of the opening 42 of the bottomed hole 4, there is formed a retaining opening edge 42a having a diameter narrower than that of the cylindrical inner side surface portion in the middle of the bottomed hole 4. The bottom 4 of such a bottomed hole 4
1, a stretchable elastic body 5a is arranged.
【００２５】弾性体５ａは、ゴムからなる伸縮自在なも
ので、有底穴４の中程の部分の径とほぼ同じかそれより
若干小さい径の円柱形状に形成してあり、長さ（即ち円
柱形状の高さ方向長さ）は、有底穴４の深さ（即ち穿設
方向長さ）の略半分としてある。この弾性体５ａは有底
穴４の底４１に配置され、さらに有底穴４のこの弾性体
５ａより開口４２側には、押圧体６が配置される。The elastic body 5a is made of rubber and is expandable and contractible, and is formed in a cylindrical shape having a diameter substantially the same as or slightly smaller than the diameter of the middle portion of the bottomed hole 4, and has a length (that is, The length in the height direction of the columnar shape is approximately half the depth of the bottomed hole 4 (that is, the length in the drilling direction). The elastic body 5a is arranged on the bottom 41 of the bottomed hole 4, and the pressing body 6 is arranged on the opening 42 side of the bottomed hole 4 with respect to the elastic body 5a.
【００２６】押圧体６は、有底穴４の中程の部分の径と
ほぼ同じかそれより若干小さい径の略球状をしたもので
ある。この押圧体６は、主に金属等で形成され、有底穴
４に配置された際に、有底穴４の開口４２の外方を向く
面に球状面部６１を形成してある。この押圧体６は、有
底穴４の開口４２側に配置されるのであるが、この時、
押圧体６が有底穴４より脱落するのを阻止するため、有
底穴４の開口４２縁には上述したような抜止開口縁４２
ａを形成してある。抜止開口縁４２ａは、有底穴４の中
程の円筒内側面状の部分よりも小さい内径となるよう
に、有底穴４の開口４２縁を絞って形成してある。ま
た、抜止開口縁４２ａとしては、リング状の部材を有底
穴４の開口４２に取り付けたものであってもよい。これ
によって、押圧体６が有底穴４より脱落するのを阻止す
ることができる。The pressing body 6 has a substantially spherical shape having a diameter substantially the same as or slightly smaller than the diameter of the middle portion of the bottomed hole 4. The pressing body 6 is mainly made of metal or the like, and has a spherical surface portion 61 formed on the surface facing the outside of the opening 42 of the bottomed hole 4 when arranged in the bottomed hole 4. The pressing body 6 is arranged on the opening 42 side of the bottomed hole 4, and at this time,
In order to prevent the pressing body 6 from falling out of the bottomed hole 4, the opening 42 of the bottomed hole 4 has a retaining opening edge 42 as described above.
a is formed. The retaining opening edge 42a is formed by squeezing the edge of the opening 42 of the bottomed hole 4 so as to have an inner diameter smaller than that of the cylindrical inner side surface portion in the middle of the bottomed hole 4. Further, as the retaining opening edge 42a, a ring-shaped member may be attached to the opening 42 of the bottomed hole 4. This can prevent the pressing body 6 from falling out of the bottomed hole 4.
【００２７】このような弾性体５ａと押圧体６とが有底
穴４に配置された際には、底４１に配置された弾性体５
ａによって押圧体６が有底穴４の抜止開口縁４２ａに弾
圧される。このようにすることで、弾性体５ａの弾性力
により押圧体６には常に有底穴４の開口４２外向きの力
が付与され、押圧体６は初期状態として抜止開口縁４２
ａに弾圧されて球状面部６１の頂央部６１ａが有底穴４
の開口４２の外側に位置する状態となる。また、図１
（ｂ）に示すように、弾性体５ａの弾性力に抗して押圧
体６の球状面部６１の頂央部６１ａを有底穴４の内方に
押すと、弾性体５ａが縮んで頂央部６１ａが有底穴４の
開口４２より外方に出ない状態となる。When the elastic body 5a and the pressing body 6 are arranged in the bottomed hole 4, the elastic body 5 arranged in the bottom 41 is arranged.
The pressing body 6 is elastically pressed against the retaining opening edge 42a of the bottomed hole 4 by a. By doing so, a force outward of the opening 42 of the bottomed hole 4 is always applied to the pressing body 6 by the elastic force of the elastic body 5a, and the pressing body 6 is in the initial state in the retaining opening edge 42.
The central portion 61a of the spherical surface portion 61 is pressed by a and the bottomed hole 4
The state of being located outside the opening 42 of FIG. Also, FIG.
As shown in (b), when the apex center portion 61a of the spherical surface portion 61 of the pressing body 6 is pushed inward of the bottomed hole 4 against the elastic force of the elastic body 5a, the elastic body 5a contracts and the apex center is formed. The portion 61a is in a state in which it does not extend outside the opening 42 of the bottomed hole 4.
【００２８】次に、ソケット１について説明する。ソケ
ット１の後端側に穿設される出力軸嵌入凹所１１は、出
力軸３が嵌入されるように出力軸３の外形に沿った内形
となるように穿設される。そして、ソケット１の出力軸
嵌入凹所１１の内側面には、上記押圧体６の頂央部６１
ａが嵌め込まれる凹部１２が形成してある。本実施形態
では、凹部１２はソケット１の出力軸嵌入凹所１１の側
壁部を貫通する穴として形成してある。この凹部１２
は、出力軸３をソケット１の出力軸嵌入凹所１１に被嵌
した際に出力軸３の有底穴４と凹部１２とが連通するよ
うに形成してある。Next, the socket 1 will be described. The output shaft fitting recess 11 formed on the rear end side of the socket 1 is formed so as to have an inner shape along the outer shape of the output shaft 3 so that the output shaft 3 is fitted therein. Then, on the inner surface of the output shaft fitting recess 11 of the socket 1, the top center portion 61 of the pressing body 6 is provided.
A recess 12 into which a is fitted is formed. In this embodiment, the recess 12 is formed as a hole penetrating the side wall of the output shaft fitting recess 11 of the socket 1. This recess 12
Is formed so that the bottomed hole 4 of the output shaft 3 and the recess 12 communicate with each other when the output shaft 3 is fitted into the output shaft fitting recess 11 of the socket 1.
【００２９】ソケット１を出力軸３に取付けるには、ソ
ケット１の出力軸嵌入凹所１１に出力軸３を挿入し、ソ
ケット１の出力軸嵌入凹所１１の開口縁部で出力軸３の
有底穴４の開口４２の外側に位置する押圧体６の頂央部
６１ａを押し下げ、出力軸３をソケット１の出力軸嵌入
凹所１１内に完全に挿入すれば、出力軸３の有底穴４と
ソケット１の凹部１２とが連通して押し下げられていた
頂央部６１ａが上がって凹部１２に嵌まり込み、ソケッ
ト１が出力軸３にロックされる。To attach the socket 1 to the output shaft 3, the output shaft 3 is inserted into the output shaft fitting recess 11 of the socket 1, and the output shaft 3 is provided at the opening edge of the output shaft fitting recess 11 of the socket 1. If the top center portion 61a of the pressing body 6 located outside the opening 42 of the bottom hole 4 is pushed down and the output shaft 3 is completely inserted into the output shaft fitting recess 11 of the socket 1, the bottomed hole of the output shaft 3 is formed. 4 and the recessed portion 12 of the socket 1 communicate with each other and are pushed down, and the apex central portion 61a rises and fits into the recessed portion 12, and the socket 1 is locked to the output shaft 3.
【００３０】ソケット１を出力軸３より取外すには、ソ
ケット１と出力軸３とを引き離す方向に力を加え、ソケ
ット１の凹部１２の縁部で凹部１２に嵌り込んでいる押
圧体６の頂央部６１ａを押し下げれば、出力軸３をソケ
ット１から引き抜くことができる。In order to remove the socket 1 from the output shaft 3, a force is applied in the direction of separating the socket 1 and the output shaft 3, and the top of the pressing body 6 fitted into the recess 12 at the edge of the recess 12 of the socket 1. The output shaft 3 can be pulled out from the socket 1 by pushing down the central portion 61a.
【００３１】以上のような構成とすることで、ソケット
１の出力軸３への取付けが容易なものでありながら、弾
性体に金属製のコイルばねのような部材の替わりにゴム
製の弾性体５ａが用いてあるため、工具使用時に、衝撃
力や振動によって弾性体５ａと有底穴４の内側面４３と
が摺れてもゴム製の弾性体５ａが摩耗することがほとん
どなく、弾性体５ａが損傷して性能が劣化してしまうの
を防止することができる。With the above-mentioned structure, the socket 1 can be easily attached to the output shaft 3, but the elastic member made of rubber is used instead of a member such as a coil spring made of metal. Since the elastic body 5a is used, even if the elastic body 5a and the inner side surface 43 of the bottomed hole 4 are slid by impact force or vibration when the tool is used, the elastic body 5a made of rubber is hardly worn, and the elastic body 5a is used. It is possible to prevent the 5a from being damaged and the performance from being deteriorated.
【００３２】次に、他の弾性体５ｂを用いた例について
図２に基づいて説明する。図１に示す上例においては、
弾性体５ａを有底穴４の中程の部分の径とほぼ同じかそ
れより若干小さい径の円柱形状に形成するものであるの
に対して、図２に示す本例においては、弾性体５ｂを長
さ方向全長に亘って有底穴４の中程の部分の径よりも小
さい径の円柱形状に形成し、有底穴４の内側面４３と弾
性体５ｂとの間に隙間８が形成されるように配置するも
のである。Next, an example using another elastic body 5b will be described with reference to FIG. In the example above shown in FIG.
While the elastic body 5a is formed in a cylindrical shape having a diameter substantially the same as or slightly smaller than the diameter of the middle portion of the bottomed hole 4, in the present example shown in FIG. 2, the elastic body 5b is formed. Is formed into a columnar shape having a diameter smaller than the diameter of the middle portion of the bottomed hole 4 over the entire length in the length direction, and a gap 8 is formed between the inner side surface 43 of the bottomed hole 4 and the elastic body 5b. It is arranged as described above.
【００３３】このようにすることで、隙間８が弾性体５
ｂの変形しろとなり、弾性体５ｂが有底穴４の内側面４
３に摺れて摩耗するのをより一層抑えることが可能とな
る。By doing so, the gap 8 is formed in the elastic body 5.
As a result, the elastic body 5b becomes the inner side surface 4 of the bottomed hole 4.
It is possible to further suppress the abrasion caused by the friction with No. 3.
【００３４】次に、更に他の弾性体５ｃを用いた例につ
いて図３に基づいて説明する。図２に示す上例において
は、弾性体５ｂを長さ方向全長に亘って有底穴４の中程
の部分の径よりも小さい径の円柱形状に形成するもので
あるのに対して、図３に示す本例においては、弾性体５
ｃを有底穴４の穿設方向の中央部の径ｄ1を前記方向の
両端部の径ｄ2よりも小さくするものである。更に述べ
ると、弾性体５ｃの有底穴４方向の両端部ｄ2の径は、
有底穴４の中程の部分の径とほぼ同じかそれより若干小
さい径となるように形成し、弾性体５ｃの有底穴４方向
の中央部の径ｄ 1は、有底穴４の中程の部分の径よりも
小さい径の円柱形状に形成して有底穴４の内側面４３と
弾性体５ｃとの間に隙間８が形成される。Next, an example using another elastic body 5c will be described.
The description will be made with reference to FIG. In the upper example shown in FIG.
Is the middle of the bottomed hole 4 over the entire length of the elastic body 5b in the longitudinal direction.
It is formed into a cylindrical shape with a diameter smaller than that of
On the other hand, in this example shown in FIG.
c is the diameter d of the central portion of the bottomed hole 4 in the drilling direction1In the direction of
Diameter d at both ends2It should be smaller than. Further mention
Then, both ends d of the elastic body 5c in the direction of the bottomed hole 42The diameter of
It is almost the same as or slightly smaller than the diameter of the middle part of the bottomed hole 4.
The elastic body 5c is formed so as to have a small diameter, and is in the bottomed hole 4 direction.
Diameter d of the central part of 1Is smaller than the diameter of the middle part of the bottomed hole 4.
The inner surface 43 of the bottomed hole 4 is formed into a cylindrical shape having a small diameter.
A gap 8 is formed between the elastic body 5c and the elastic body 5c.
【００３５】このようにすることで、弾性体５ｃの中央
部と有底穴４の内側面４３との間に隙間８が形成できて
弾性体５ｃが有底穴４の内側面４３に摺れて摩耗するの
を抑えることができるものでありながら、弾性体５ｃの
両端部の径ｄ2は有底穴４の中程の部分とほぼ同じかそ
れより若干小さく形成してあるため、有底穴４内での倒
れ等によって弾性体５ｃが有底穴４でこじれることなく
安定性良く配置することが可能となる。By doing so, a gap 8 can be formed between the central portion of the elastic body 5c and the inner side surface 43 of the bottomed hole 4, and the elastic body 5c slides on the inner side surface 43 of the bottomed hole 4. The diameter d 2 of both ends of the elastic body 5c is formed to be substantially the same as or slightly smaller than the middle portion of the bottomed hole 4, so that the bottomed hole 4 can be prevented from wearing. It is possible to arrange the elastic body 5c with good stability without being twisted in the bottomed hole 4 due to the collapse or the like in the hole 4.
【００３６】次に、更に他の弾性体５を用いた例につい
て図４に基づいて説明する。これは、複数の弾性体５を
有底穴４の穿設方向に圧接配置し、これらの弾性体５の
うちの少なくとも一つは有底穴４の内側面４３との間に
隙間８が形成されるようにするものである。更に述べる
と、図４に示す本例では、二個の弾性体５ｄ，５ｅを配
置するもので、有底穴４の底４１に配置される弾性体５
ｅは、有底穴４の中程の部分の径よりも小さい径の円柱
形状に形成されて有底穴４の内側面４３と該弾性体５ｅ
との間に隙間８が形成されるように配置されるものであ
り、有底穴４の開口４２側に配置される弾性体５ｄは、
有底穴４の中程の部分の径とほぼ同じかそれより若干小
さい径の円柱形状に形成される。また、これらの弾性体
５ｄ，５ｅはいずれも長さ（即ち円柱形状の高さ方向長
さ）が、有底穴４の深さ（即ち穿設方向長さ）の略１／
４となるように形成してある。Next, an example using another elastic body 5 will be described with reference to FIG. This is because a plurality of elastic bodies 5 are arranged in pressure contact with each other in the direction of forming the bottomed hole 4, and at least one of the elastic bodies 5 forms a gap 8 between the inner surface 43 of the bottomed hole 4. To be done. More specifically, in this example shown in FIG. 4, two elastic bodies 5d and 5e are arranged, and the elastic body 5 arranged at the bottom 41 of the bottomed hole 4 is arranged.
e is formed in a cylindrical shape having a diameter smaller than the diameter of the middle portion of the bottomed hole 4, and is formed on the inner surface 43 of the bottomed hole 4 and the elastic body 5e.
And the elastic body 5d disposed on the side of the opening 42 of the bottomed hole 4 is
It is formed in a cylindrical shape having a diameter substantially the same as or slightly smaller than the diameter of the middle portion of the bottomed hole 4. The length of each of the elastic bodies 5d and 5e (that is, the length in the height direction of the columnar shape) is approximately 1 / the depth of the bottomed hole 4 (that is, the length in the drilling direction).
4 is formed.
【００３７】このようにすることで、弾性体５と有底穴
４の内側面４３との間に隙間８が形成できて弾性体５が
有底穴４の内側面４３に摺れて摩耗するのを抑えること
ができると共に、有底穴４内での倒れ等によって弾性体
５が有底穴４でこじるれことなく安定性良く配置するこ
とが可能となる。By doing so, the gap 8 can be formed between the elastic body 5 and the inner side surface 43 of the bottomed hole 4, and the elastic body 5 slides on the inner side surface 43 of the bottomed hole 4 and wears. In addition to being able to suppress the deformation, the elastic body 5 can be arranged with good stability without being twisted in the bottomed hole 4 due to tilting in the bottomed hole 4.
【００３８】またこの時、有底穴４の内側面４３との間
に隙間８が形成される弾性体５（即ち図４に示す例では
有底穴４の底４１側の弾性体５ｅ）の硬度をそれ以外の
弾性体５（即ち図４に示す例では有底穴４の開口４２側
の弾性体５ｄ）の硬度よりも低くしてもよい。At this time, the elastic body 5 (that is, the elastic body 5e on the bottom 41 side of the bottomed hole 4 in the example shown in FIG. 4) in which the gap 8 is formed between the inner surface 43 of the bottomed hole 4 is formed. The hardness may be lower than the hardness of the other elastic body 5 (that is, the elastic body 5d on the opening 42 side of the bottomed hole 4 in the example shown in FIG. 4).
【００３９】このようにすることで、有底穴４の内側面
４３に摺れて摩耗する惧れが少ない弾性体５の硬度を下
げて弾性係数を下げることで、変形量を大きくすること
が可能となる。By doing so, the amount of deformation can be increased by lowering the hardness and elastic coefficient of the elastic body 5 less likely to be worn by sliding on the inner surface 43 of the bottomed hole 4. It will be possible.
【００４０】次に、更に他の弾性体５ｆを用いた例につ
いて図５に基づいて説明する。これは、図１に示す弾性
体５ａにおいて、図５に示すように有底穴４方向に貫通
孔５１を穿孔したものである。Next, an example using another elastic body 5f will be described with reference to FIG. This is the elastic body 5a shown in FIG. 1 in which a through hole 51 is bored in the direction of the bottomed hole 4 as shown in FIG.
【００４１】このようにすることで、弾性体５ｆの圧縮
変形を弾性体５ｆの外方向のみにではなく内方向にも分
散することができて、有底穴４内での倒れ等によって弾
性体５ｆが有底穴４でこじるれことなく安定性良く配置
することが可能となると共に、押圧体６が球状に形成し
てある場合には、この押圧体６の頂央部６１ａと反対側
の頂部（特に図示せず）を貫通孔５１に合わせて押圧体
６を安定性良く収納することが可能となる。By doing so, the compressive deformation of the elastic body 5f can be dispersed not only in the outward direction of the elastic body 5f but also in the inward direction, and the elastic body can be collapsed in the bottomed hole 4 or the like. 5f can be arranged with good stability without twisting in the bottomed hole 4, and when the pressing body 6 is formed in a spherical shape, the pressing body 6 on the side opposite to the central central portion 61a is formed. It is possible to store the pressing body 6 with good stability by aligning the top portion (not particularly shown) with the through hole 51.
【００４２】次に、図６に基づいて、他の実施形態につ
いて説明する。これは、図１乃至図５に示す上実施形態
と比較して、弾性体５の替わりに、斥力によって互いに
反発し合う磁石からなる一対の反発体７（７ａ，７ｂ）
を用い、更に、球状でなく半球状の押圧体６ａを用いた
ものである。なお、図６に示す本実施形態は、図１乃至
図５に示す上実施形態と大部分同じであるため、同じ部
分については説明を省略する。Next, another embodiment will be described with reference to FIG. This is different from the above-described embodiment shown in FIGS. 1 to 5 in that, instead of the elastic body 5, a pair of repulsion bodies 7 (7a, 7b) made of magnets repulsing each other by a repulsive force.
And a hemispherical pressing body 6a is used instead of a spherical shape. Note that the present embodiment shown in FIG. 6 is largely the same as the upper embodiment shown in FIGS. 1 to 5, and therefore the description of the same parts will be omitted.
【００４３】本実施形態の反発体７ａ，７ｂはそれぞ
れ、有底穴４の中程の部分の径とほぼ同じかそれより若
干小さい径の円板形状に形成した同一のもので、円板の
上下面がそれぞれＮ極，Ｓ極となるようにしてある。ま
た、押圧体６ａは、有底穴４の中程の部分の径とほぼ同
じか若干小さい径の略半球状をしたものである。この反
発体７の有底穴４への配置は、二個の反発体７ａ，７ｂ
をＮ極同士又はＳ極同士が対向するように向かい合わ
せ、互いに斥力で反発するように有底穴４に配置するも
のである。The repulsion bodies 7a and 7b of this embodiment are the same in the shape of a disk having a diameter substantially the same as or slightly smaller than the diameter of the middle portion of the bottomed hole 4, respectively. The upper and lower surfaces have N pole and S pole, respectively. The pressing body 6a has a substantially hemispherical shape with a diameter that is substantially the same as or slightly smaller than the diameter of the middle portion of the bottomed hole 4. The repulsion body 7 is arranged in the bottomed hole 4 by placing two repulsion bodies 7a and 7b.
Are arranged in the bottomed hole 4 so that the N poles face each other or the S poles face each other and the repulsive forces repel each other.
【００４４】このようにすることで、押圧体６ａを有底
穴４の抜止開口縁４２ａに弾圧する反発体７を半永久的
に使用することが可能となる。By doing so, it becomes possible to semi-permanently use the repulsion body 7 that elastically presses the pressing body 6a against the retaining opening edge 42a of the bottomed hole 4.
【００４５】またこの時、図７に示すように、一対の反
発体７ａ，７ｂの互いに対向する面のうちの一方を凹面
７１、他方を凸面７２としてもよい。At this time, as shown in FIG. 7, one of the opposing surfaces of the pair of repulsion bodies 7a, 7b may be a concave surface 71 and the other may be a convex surface 72.
【００４６】このようにすることで、反発体７ａ，７ｂ
の対向する面積が増加して反発力を高めることができ、
所定の反発力を生じる反発体７を小型化することが可能
となる。By doing so, the repulsion members 7a, 7b are
The opposing area of can be increased and the repulsive force can be increased,
It is possible to reduce the size of the repulsive body 7 that produces a predetermined repulsive force.
【００４７】[0047]
【発明の効果】上記のように本発明の請求項１記載の発
明にあっては、ソケットを電動工具本体の出力軸に着脱
自在に取付ける電動工具において、出力軸の側面に軸方
向と垂直な方向に有底穴を穿設し、該有底穴の底にゴム
からなる伸縮自在な弾性体を配置し、有底穴の開口側に
該開口の外方を向く面に球状面部を形成した押圧体を配
置し、該押圧体が有底穴より脱落するのを阻止する押圧
体の球状面部の外径よりも小さい内径の抜止開口縁を有
底穴の開口縁に形成し、弾性体により押圧体を抜止開口
縁に弾圧して球状面部の頂央部を有底穴の開口の外方に
位置させ、前記頂央部がソケットの出力軸嵌入凹所の内
側面に形成された凹部に嵌め込まれるので、出力軸の有
底穴の底に配置する弾性体をゴムで形成してあるため弾
性体と有底穴の側面とが摺れても弾性体が摩耗するのを
抑えることができ、弾性体が損傷して性能が劣化するの
を防止することができる。As described above, according to the first aspect of the present invention, in a power tool in which the socket is detachably attached to the output shaft of the power tool body, the side surface of the output shaft is perpendicular to the axial direction. A bottomed hole is bored in the direction, a stretchable elastic body made of rubber is arranged at the bottom of the bottomed hole, and a spherical surface portion is formed on the opening side of the bottomed hole on the surface facing the outside of the opening. The pressing body is arranged, and a retaining opening edge having an inner diameter smaller than the outer diameter of the spherical surface portion of the pressing body for preventing the pressing body from falling out of the bottomed hole is formed on the opening edge of the bottomed hole by the elastic body. The pressing body is elastically pressed against the edge of the retaining opening so that the central portion of the spherical surface portion is located outside the opening of the bottomed hole, and the central portion is a recess formed on the inner surface of the output shaft fitting recess of the socket. Since it is fitted, the elastic body placed at the bottom of the bottomed hole of the output shaft is made of rubber. Bets can also be prevented from the elastic body to wear them, it is possible to prevent the deterioration performance elastic body is damaged.
【００４８】また請求項２記載の発明にあっては、上記
請求項１記載の発明の効果に加えて、有底穴の断面積の
半分以上の断面積を有し且つ、有底穴に配置された際に
該有底穴の内側面との間に隙間が形成される弾性体を用
いるので、弾性体が有底穴の内側面に摺れて摩耗するの
をより一層抑えることが可能となる。In addition to the effect of the invention according to claim 1, the invention according to claim 2 has a cross-sectional area that is at least half the cross-sectional area of the bottomed hole and is arranged in the bottomed hole. When an elastic body is used, a gap is formed between the elastic body and the inner surface of the bottomed hole, so it is possible to further suppress abrasion of the elastic body by sliding on the inner surface of the bottomed hole. Become.
【００４９】また請求項３記載の発明にあっては、上記
請求項１記載の発明の効果に加えて、弾性体の有底穴方
向の中央部の径が前記方向の両端部の径よりも小さいの
で、弾性体の中央部と有底穴の内側面との間に隙間が形
成できて弾性体が有底穴の内側面に摺れて摩耗するのを
抑えることができるものでありながら、弾性体の両端部
の径は有底穴の中程の部分とほぼ同じか若干小さく形成
してあるため、有底穴内での倒れ等によって弾性体が有
底穴でこじれることなく安定性良く配置することが可能
となる。In addition to the effect of the invention described in claim 1, the diameter of the central portion of the elastic body in the direction of the bottomed hole is larger than the diameter of both ends in the direction. Since it is small, a gap can be formed between the central part of the elastic body and the inner surface of the bottomed hole, and it is possible to prevent the elastic body from sliding and wearing on the inner surface of the bottomed hole. Since the diameter of both ends of the elastic body is formed to be approximately the same as or slightly smaller than the middle part of the bottomed hole, the elastic body is arranged stably without being twisted in the bottomed hole and twisting in the bottomed hole. It becomes possible to do.
【００５０】また請求項４記載の発明にあっては、上記
請求項１記載の発明の効果に加えて、複数の弾性体を有
底穴方向に圧接配置し、前記複数の弾性体のうち少なく
とも一つの弾性体は有底穴の内側面との間に隙間が形成
されるので、弾性体と有底穴の内側面との間に隙間が形
成できて弾性体が有底穴の内側面に摺れて摩耗するのを
抑えることができると共に、有底穴内での倒れ等によっ
て弾性体が有底穴でこじれることなく安定性良く配置す
ることが可能となる。In addition to the effect of the invention according to claim 1, in the invention according to claim 4, a plurality of elastic bodies are arranged in pressure contact in the direction of the bottomed hole, and at least one of the plurality of elastic bodies is arranged. Since a gap is formed between one elastic body and the inner surface of the bottomed hole, a gap can be formed between the elastic body and the inner surface of the bottomed hole, and the elastic body It is possible to suppress abrasion due to rubbing, and it is possible to arrange the elastic body with good stability without being twisted in the bottomed hole due to tilting in the bottomed hole.
【００５１】また請求項５記載の発明にあっては、上記
請求項４記載の発明の効果に加えて、有底穴の内側面と
の間に隙間が形成される弾性体の硬度がそれ以外の弾性
体の硬度よりも低いので、有底穴の内側面に摺れて摩耗
する惧れが少ない弾性体の硬度を下げて弾性係数を下げ
ることで、押圧体が押し下げられた時の弾性体の変形量
を大きくすることが可能となる。According to the invention of claim 5, in addition to the effect of the invention of claim 4, the hardness of the elastic body in which a gap is formed between the inner surface of the bottomed hole is other than that. Since the hardness of the elastic body is lower than that of the elastic body, it is less likely to be worn by sliding on the inner surface of the bottomed hole. It is possible to increase the deformation amount of.
【００５２】また請求項６記載の発明にあっては、上記
請求項２乃至５のいずれかに記載の発明の効果に加え
て、弾性体に有底穴方向に貫通孔を穿孔するので、弾性
体の圧縮変形を弾性体の外方向のみにではなく内方向に
も分散することができて、有底穴内での倒れ等によって
弾性体が有底穴でこじるれことなく安定性良く配置する
ことが可能となる。According to the invention of claim 6, in addition to the effect of the invention of any one of claims 2 to 5, the through hole is formed in the elastic body in the direction of the bottomed hole. Compressive deformation of the body can be dispersed not only in the outward direction of the elastic body but also in the inward direction, and the elastic body can be arranged with stability without being twisted in the bottomed hole and twisting in the bottomed hole. Is possible.
【００５３】また請求項７記載の発明にあっては、ソケ
ットを電動工具本体の出力軸に着脱自在に取付ける電動
工具において、出力軸の側面に軸方向と垂直な方向に有
底穴を穿設し、該有底穴の底に斥力によって互いに反発
し合う磁石からなる一対の反発体を配置し、有底穴の開
口側に該開口の外方を向く面に球状面部を形成した押圧
体を配置し、該押圧体が有底穴より脱落するのを阻止す
る押圧体の球状面部の外径よりも小さい内径の抜止開口
縁を有底穴の開口縁に形成し、反発体により押圧体を抜
止開口縁に弾圧して球状面部の頂央部を有底穴の開口の
外方に位置させ、前記頂央部がソケットの出力軸嵌入凹
所の内側面に形成された凹部に嵌め込まれるので、押圧
体を有底穴の抜止開口縁に弾圧する反発体を半永久的に
使用することが可能となる。According to a seventh aspect of the invention, in a power tool in which the socket is detachably attached to the output shaft of the power tool body, a bottomed hole is formed in the side surface of the output shaft in a direction perpendicular to the axial direction. Then, a pair of repulsive bodies composed of magnets that repel each other by repulsive force are arranged at the bottom of the bottomed hole, and a pressing body having a spherical surface portion on the opening side of the bottomed hole is formed on the surface facing the outside of the opening. The retaining body is provided with a retaining opening edge having an inner diameter smaller than the outer diameter of the spherical surface portion of the pressing body that prevents the pressing body from falling out of the bottomed hole, and the pressing body is formed by the repulsion body. Since the top central part of the spherical surface portion is positioned outside the opening of the bottomed hole by elastically pressing the retaining opening edge, and the top central portion is fitted into the concave portion formed on the inner surface of the output shaft fitting concave portion of the socket. It is possible to use semi-permanently a repulsion body that presses the pressing body against the removal opening edge of the bottomed hole. To become.
【００５４】また請求項８記載の発明にあっては、上記
請求項７記載の発明の効果に加えて、一対の反発体の互
いに対向する面のうちの一方を凹面、他方を凸面とした
ので、反発体の対向する面積が増加して反発力を高める
ことができ、所定の反発力を生じる反発体を小型化する
ことが可能となる。According to the invention of claim 8, in addition to the effect of the invention of claim 7, one of the opposing surfaces of the pair of repulsion bodies is a concave surface and the other is a convex surface. The opposing area of the repulsive body can be increased to enhance the repulsive force, and the repulsive body that produces a predetermined repulsive force can be downsized.
【図１】本発明の一実施形態の要部を示し、（ａ）は押
圧体に力を加えない状態の断面図であり、（ｂ）は押圧
体に力を加えた状態の断面図である。FIG. 1 is a cross-sectional view showing a main part of an embodiment of the present invention, in which (a) is a cross-sectional view in a state where force is not applied to a pressing body, and (b) is a cross-sectional view in a state where force is applied to a pressing body. is there.
【図２】同上の実施形態において他の弾性体を用いた例
の要部断面図である。FIG. 2 is a sectional view of an essential part of an example in which another elastic body is used in the same embodiment.
【図３】同上の実施形態において更に他の弾性体を用い
た例の要部断面図である。FIG. 3 is a cross-sectional view of essential parts of an example in which still another elastic body is used in the above-described embodiment.
【図４】同上の実施形態において更に他の弾性体を用い
た例の要部断面図である。FIG. 4 is a cross-sectional view of essential parts of an example in which another elastic body is used in the above-described embodiment.
【図５】同上の実施形態において更に他の弾性体を用い
た例を示し、（ａ）は要部断面図であり、（ｂ）は弾性
体の斜視図である。5A and 5B show an example in which another elastic body is used in the above embodiment, FIG. 5A is a sectional view of a main part, and FIG. 5B is a perspective view of the elastic body.
【図６】他の実施形態の要部を示し、（ａ）は押圧体に
力を加えない状態の断面図であり、（ｂ）は押圧体に力
を加えた状態の断面図である。6A and 6B are views showing a main part of another embodiment, wherein FIG. 6A is a sectional view in a state where no force is applied to the pressing body, and FIG. 6B is a sectional view in a state where force is applied to the pressing body.
【図７】同上の実施形態において他の反発体を用いた例
の要部断面図である。FIG. 7 is a cross-sectional view of essential parts of an example in which another repulsive body is used in the same embodiment.
【図８】電動工具全体を説明する説明図である。FIG. 8 is an explanatory diagram illustrating an entire electric power tool.
【図９】従来例の説明図である。FIG. 9 is an explanatory diagram of a conventional example.
【図１０】他の従来例でソケットの出力軸への被嵌につ
いての説明図であり、（ａ）はソケットを出力軸先端に
被せた状態を示し、（ｂ）はソケットの縁部で押圧体を
押し下げた状態を示し、（ｃ）は押圧体がソケットの貫
通穴に嵌り込んだ状態を示し、（ｄ）は出力軸に穿設し
た貫通穴を栓部材で閉塞して有底穴を形成する場合の説
明図である。FIG. 10 is an explanatory view of fitting of the socket onto the output shaft in another conventional example, (a) shows a state in which the socket is put on the tip of the output shaft, and (b) shows pressing by the edge of the socket. The state in which the body is pushed down is shown, (c) shows the state in which the pressing body fits into the through hole of the socket, and (d) shows the bottomed hole by closing the through hole formed in the output shaft with the plug member. It is explanatory drawing at the time of forming.
１ ソケット １１ 出力軸嵌入凹所 １２ 凹部 ２ 電動工具本体 ３ 出力軸 ４ 有底穴 ４１ 底 ４２ 開口 ４２ａ 抜止開口縁 ５ 弾性体 ６ 押圧体 ６１ 球状面部 ６１ａ 頂央部 1 socket 11 Output shaft fitting recess 12 recess 2 Power tool body 3 output axes 4 bottomed holes 41 bottom 42 opening 42a retaining opening edge 5 elastic body 6 Pressing body 61 spherical surface 61a Central part
Claims (8)
自在に取付ける電動工具において、出力軸の側面に軸方
向と垂直な方向に有底穴を穿設し、該有底穴の底にゴム
からなる伸縮自在な弾性体を配置し、有底穴の開口側に
該開口の外方を向く面に球状面部を形成した押圧体を配
置し、該押圧体が有底穴より脱落するのを阻止する押圧
体の球状面部の外径よりも小さい内径の抜止開口縁を有
底穴の開口縁に形成し、弾性体により押圧体を抜止開口
縁に弾圧して球状面部の頂央部を有底穴の開口の外方に
位置させ、前記頂央部がソケットの出力軸嵌入凹所の内
側面に形成された凹部に嵌め込まれることを特徴とする
電動工具。1. A power tool in which a socket is removably attached to an output shaft of a power tool body. A bottomed hole is formed in a side surface of the output shaft in a direction perpendicular to an axial direction, and a rubber is provided at a bottom of the bottomed hole. An elastic body made of is arranged, and a pressing body having a spherical surface portion formed on a surface facing the opening of the bottomed hole is arranged on the opening side of the bottomed hole so that the pressing body does not fall out of the bottomed hole. A retaining opening edge with an inner diameter smaller than the outer diameter of the spherical surface portion of the pressing body to be blocked is formed on the opening edge of the bottomed hole, and the elastic body elastically presses the pressing body against the retaining opening edge to provide the central portion of the spherical surface portion. An electric power tool, which is located outside an opening of a bottom hole, and whose top central portion is fitted into a concave portion formed on an inner surface of an output shaft fitting concave portion of a socket.
し且つ、有底穴に配置された際に該有底穴の内側面との
間に隙間が形成される弾性体を用いることを特徴とする
請求項１記載の電動工具。2. An elastic body having a cross-sectional area that is at least half the cross-sectional area of the bottomed hole and in which a gap is formed between the bottomed hole and the inner surface of the bottomed hole when it is placed in the bottomed hole. The electric power tool according to claim 1, which is used.
方向の両端部の径よりも小さいことを特徴とする請求項
１記載の電動工具。3. The electric tool according to claim 1, wherein the diameter of the central portion of the elastic body in the direction of the bottomed hole is smaller than the diameter of both end portions in the direction.
し、前記複数の弾性体のうち少なくとも一つの弾性体は
有底穴の内側面との間に隙間が形成されることを特徴と
する請求項１記載の電動工具。4. A plurality of elastic bodies are arranged in pressure contact in the direction of the bottomed hole, and a gap is formed between at least one of the plurality of elastic bodies and the inner surface of the bottomed hole. The electric power tool according to claim 1.
る弾性体の硬度がそれ以外の弾性体の硬度よりも低いこ
とを特徴とする請求項４記載の電動工具。5. The electric tool according to claim 4, wherein the hardness of the elastic body forming a gap between the inner surface of the bottomed hole and the elastic body is lower than the hardness of the other elastic bodies.
ことを特徴とする請求項２乃至５記載の電動工具。6. The electric tool according to claim 2, wherein a through hole is formed in the elastic body in the direction of the bottomed hole.
自在に取付ける電動工具において、出力軸の側面に軸方
向と垂直な方向に有底穴を穿設し、該有底穴の底に斥力
によって互いに反発し合う磁石からなる一対の反発体を
配置し、有底穴の開口側に該開口の外方を向く面に球状
面部を形成した押圧体を配置し、該押圧体が有底穴より
脱落するのを阻止する押圧体の球状面部の外径よりも小
さい内径の抜止開口縁を有底穴の開口縁に形成し、反発
体により押圧体を抜止開口縁に弾圧して球状面部の頂央
部を有底穴の開口の外方に位置させ、前記頂央部がソケ
ットの出力軸嵌入凹所の内側面に形成された凹部に嵌め
込まれることを特徴とする電動工具。7. An electric power tool in which a socket is detachably attached to an output shaft of an electric power tool body, wherein a bottomed hole is formed in a side surface of the output shaft in a direction perpendicular to an axial direction, and a repulsive force is applied to a bottom of the bottomed hole. A pair of repulsive bodies composed of magnets that repel each other are arranged, and a pressing body having a spherical surface portion on the surface facing the outside of the bottomed hole is arranged on the opening side of the bottomed hole. A retaining opening edge with an inner diameter smaller than the outer diameter of the spherical surface portion of the pressing body that prevents further falling is formed on the opening edge of the bottomed hole, and the pressing body is elastically pressed against the retaining opening edge by the repulsive body to form a spherical surface portion. An electric tool characterized in that a top center portion is located outside an opening of a bottomed hole, and the top center portion is fitted into a recess formed on an inner surface of an output shaft fitting recess of a socket.
の一方を凹面、他方を凸面とすることを特徴とする請求
項７記載の電動工具。8. The electric tool according to claim 7, wherein one of the surfaces of the pair of repulsive members facing each other is a concave surface and the other is a convex surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001333383A JP4158372B2 (en) | 2001-10-30 | 2001-10-30 | Electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001333383A JP4158372B2 (en) | 2001-10-30 | 2001-10-30 | Electric tool |
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| Publication Number | Publication Date |
|---|---|
| JP2003136436A true JP2003136436A (en) | 2003-05-14 |
| JP4158372B2 JP4158372B2 (en) | 2008-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001333383A Expired - Fee Related JP4158372B2 (en) | 2001-10-30 | 2001-10-30 | Electric tool |
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| JP (1) | JP4158372B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009069457A1 (en) * | 2007-11-27 | 2009-06-04 | Isuzu Motors Limited | Marking torque wrench |
| JP2009154237A (en) * | 2007-12-26 | 2009-07-16 | Isuzu Motors Ltd | Spanner type torque wrench with marking function |
| CN117388083A (en) * | 2023-12-13 | 2024-01-12 | 常州森鸿装饰材料股份有限公司 | Floor intensity detection device |
-
2001
- 2001-10-30 JP JP2001333383A patent/JP4158372B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009069457A1 (en) * | 2007-11-27 | 2009-06-04 | Isuzu Motors Limited | Marking torque wrench |
| JP2009125906A (en) * | 2007-11-27 | 2009-06-11 | Isuzu Motors Ltd | Marking torque wrench |
| CN101835566B (en) * | 2007-11-27 | 2012-04-11 | 五十铃自动车株式会社 | Marking torque wrench |
| JP2009154237A (en) * | 2007-12-26 | 2009-07-16 | Isuzu Motors Ltd | Spanner type torque wrench with marking function |
| CN117388083A (en) * | 2023-12-13 | 2024-01-12 | 常州森鸿装饰材料股份有限公司 | Floor intensity detection device |
| CN117388083B (en) * | 2023-12-13 | 2024-02-13 | 常州森鸿装饰材料股份有限公司 | Floor intensity detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4158372B2 (en) | 2008-10-01 |
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