JPH078142Y2 - Tool holding device - Google Patents

Tool holding device

Info

Publication number
JPH078142Y2
JPH078142Y2 JP1986024827U JP2482786U JPH078142Y2 JP H078142 Y2 JPH078142 Y2 JP H078142Y2 JP 1986024827 U JP1986024827 U JP 1986024827U JP 2482786 U JP2482786 U JP 2482786U JP H078142 Y2 JPH078142 Y2 JP H078142Y2
Authority
JP
Japan
Prior art keywords
retainer
tool
groove
rod
diameter portion
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
JP1986024827U
Other languages
Japanese (ja)
Other versions
JPS62138583U (en
Inventor
喜彦 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
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.)
Filing date
Publication date
Application filed by Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP1986024827U priority Critical patent/JPH078142Y2/en
Publication of JPS62138583U publication Critical patent/JPS62138583U/ja
Application granted granted Critical
Publication of JPH078142Y2 publication Critical patent/JPH078142Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Percussive Tools And Related Accessories (AREA)

Description

【考案の詳細な説明】 〔考案の利用分野〕 本考案は、電気ハンマ、ハンマドリルのように工具保持
装置を有する電動工具の工具保持装置の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to an improvement of a tool holding device for an electric tool having a tool holding device such as an electric hammer and a hammer drill.

〔考案の背景〕[Background of the invention]

従来のハンマ、ハンマドリルの工具保持装置もほぼ同構
造のものであるが、空転時の打撃動作（空打ち）時、及
び通常のはっり、穴あけ作業の終了後にスイッチを入れ
たまま、本体を持ち上げたときの工具の飛び出し、時
に、工具の突当部がリテーナの端面に突き当たりリテー
ナ及びその係合部品に衝撃荷重を与える。この時、２個
のスプリングで吊られているリテーナと、リテーナロッ
ドとの動きに相違が生じ、リテーナとリテーナロッドと
の係合が外れ、リテーナが回転し、工具が脱落する欠点
を持っていた。Although the conventional hammers and hammer drills have almost the same structure as the tool holding device, the main body remains in the switch-on state when hitting (idling) during idling and after normal drilling and drilling. When the tool pops out when it is lifted, sometimes the abutment part of the tool hits the end face of the retainer and gives an impact load to the retainer and its engaging parts. At this time, the retainer hung by two springs and the retainer rod have different movements, the retainer and the retainer rod are disengaged, the retainer rotates, and the tool falls off. .

〔考案の目的〕[Purpose of device]

本考案は、従来品の工具保持部を、更に改良すべく検討
を加えた結果をなされたもので、目的とするところは、
電気ハンマ、ハンマドリルの不意の工具脱落を防止し、
安全で確実な工具保持部を提供することにある。The present invention has been made as a result of further studies to improve the conventional tool holding portion.
Prevents unexpected tool loss of electric hammers and hammer drills,
It is to provide a safe and reliable tool holder.

〔考案の概要〕[Outline of device]

本体の動作により発生する工具の動きを取り除くこと
は、電気ハンマ、ハンマドリルの機体の機能上不可であ
る。すなわち、工具がリテーナに突き当たり、バタツキ
が発生しても不意にリテーナが外れ、工具が脱落しない
構造とする必要がある。It is impossible to remove the movement of the tool caused by the operation of the main body, because of the function of the electric hammer and hammer drill. That is, it is necessary to have a structure in which the tool hits the retainer and the retainer suddenly comes off even if fluttering occurs and the tool does not fall off.

本考案は、工具の動きにより発生する荷重方向が一定し
ていることに着目し、発生する荷重方向工具の軸方向と
直角方向に大きな荷重を作用させないとリテーナとリテ
ーナロッドとの係合を解除出来ない構造に改良したもの
である。The present invention focuses on the fact that the direction of the load generated by the movement of the tool is constant, and the direction of the generated load releases the engagement between the retainer and the retainer rod unless a large load is applied in the direction perpendicular to the axial direction of the tool. This is an improved structure that cannot be used.

〔考案の実施例〕[Example of device]

本考案を図面にもとづいて説明すると、第１図は本考案
の工具保持装置の一実施例を示す部分断面図、第２図は
工具の着脱のためにリテーナロッド６を押し上げた状態
を示す部分断面図、第３図は第１図のＩ−Ｉ断面図、第
４図は第２図のII-II断面図である。図において１は内
蔵物をおおうシリンダケースでこの前方に工具２を保持
するフロントカバ３とリテーナ４を有し、それぞれの両
側に２カ所の穴を有している。このリテーナ４とフロン
トカバ３との穴に、リテーナロッド５、リテーナロッド
６が挿通し、リテーナ４がフロントカバ３に取付いてい
る。リテーナロッド５、リテーナロッド６の後端には、
ニードルローラ７を挿入する穴を有し、リテーナロッド
５、リテーナロッド６の外周にフロントカバ３の端側よ
り、弾性体で作られたダンパ８、ワッシャ９、スプリン
グ10、ストッパワッシャ11、ストッパリング12、ストッ
パ13が配設されている。ストッパ13は、ニードルローラ
の挿入穴を有しワッシャ９を介してスプリング10を受け
リテーナロッド５、リテーナロッド６とニードルローラ
７により保持されている。ニードルローラ７の動き止
め、抜け止めは、ストッパリング12で行う構造となって
いる。リテーナ４には、第３図及び第４図で示す様に、
工具２のシャンク部17が係合する溝14とリテーナロッド
６が係合する溝15がリテーナロッド５を中心とする円弧
で形成されている。リテーナロッド６が挿入する溝15に
は、リテーナロッド６のφＤ部が嵌合する穴D1，部とリ
テーナロッド６のφｄ部が嵌合する溝Ｌとがあり、溝Ｌ
は小径部φｄよりも巾広であり且つ大径部φＤよりも巾
狭に形成されている。そして、溝穴D1部の中心線18と溝
Ｌの中心線19との距離の分、リテーナロッド６が移動可
能でありこの距離が芯ずれＡとなる。リテーナ４を回動
させると、リテーナ４に形成された穴D1部及び溝Ｌの連
通部に設けられた押圧部20が。リテーナロッド６の小径
部φｄの外側面を第４図に示すＦ方向に押圧するため、
リテーナロッド６の中心は穴D1部の中心線18上から溝Ｌ
の中心線上に移動する。即ちリテーナロッド６を芯ずれ
Ａ分だけ移動させることができる。この構造において工
具２の着脱時は、第２図に示す様に、リテーナロッド６
の後端を矢印Ｃ方向に（ストッパ13がワッシャ９に突き
当たる所まで）押し上げる。次にリテーナ４を第４図に
示す矢印Ｅ方向に回動させるとリテーナロッド６のφｄ
部が、リテーナ４の溝15に突き当たる。更に回動させる
と、押圧部20の作用によりリテーナロッド６の外面を矢
印Ｆ方向（工具２の運動と直角方向）に押し上げる力が
働きフロントカバ３のリテーナロッド６挿入穴径とリテ
ーナロッド６の軸径φｄ部との差の半分の量即ち、芯ず
れＡ分だけ、リテーナロッド６が移動する。（この時の
荷重は、フロントカバとダンパとの接着面のマサツ抵抗
により生じる）リテーナロッド６は、リテーナ４の溝15
に嵌挿しているためリテーナ４が回転し工具の着脱が可
能となる。この様に工具の運動方向と直角方向にリテー
ナロッド６を移動させ、リテーナ４を回動させ工具の着
脱を行なうことができる。The present invention will be described with reference to the drawings. FIG. 1 is a partial sectional view showing an embodiment of a tool holding device of the present invention, and FIG. 2 is a part showing a state in which a retainer rod 6 is pushed up for attachment and detachment of a tool. A sectional view, FIG. 3 is a sectional view taken along the line II of FIG. 1, and FIG. 4 is a sectional view taken along the line II-II of FIG. In the figure, reference numeral 1 denotes a cylinder case which covers a built-in object, and has a front cover 3 for holding a tool 2 and a retainer 4 in front of the cylinder case, and has two holes on both sides thereof. The retainer rod 5 and the retainer rod 6 are inserted into the holes of the retainer 4 and the front cover 3, and the retainer 4 is attached to the front cover 3. At the rear end of retainer rod 5 and retainer rod 6,
A hole for inserting the needle roller 7 is provided, and a damper 8, a washer 9, a spring 10, a stopper washer 11, and a stopper ring made of an elastic body are provided on the outer circumferences of the retainer rod 5 and the retainer rod 6 from the end side of the front cover 3. 12 and a stopper 13 are provided. The stopper 13 has a needle roller insertion hole and receives a spring 10 via a washer 9 and is held by a retainer rod 5, a retainer rod 6 and a needle roller 7. The stopper ring 12 is used to prevent the needle roller 7 from moving and coming off. In the retainer 4, as shown in FIGS. 3 and 4,
A groove 14 with which the shank portion 17 of the tool 2 engages and a groove 15 with which the retainer rod 6 engages are formed in an arc centered on the retainer rod 5. The groove 15 into which the retainer rod 6 is inserted has a hole D 1 into which the φD portion of the retainer rod 6 is fitted and a groove L into which the φd portion of the retainer rod 6 is fitted.
Is wider than the small-diameter portion φd and narrower than the large-diameter portion φD. Then, the retainer rod 6 is movable by the distance between the center line 18 of the groove hole D 1 and the center line 19 of the groove L, and this distance is the misalignment A. When the retainer 4 is rotated, the pressing portion 20 provided in the communicating portion of the hole D 1 portion formed in the retainer 4 and the groove L. Since the outer surface of the small diameter portion φd of the retainer rod 6 is pressed in the F direction shown in FIG. 4,
The center of retainer rod 6 is groove L from the center line 18 of hole D 1
Move to the center line of. That is, the retainer rod 6 can be moved by the amount of misalignment A. In this structure, when the tool 2 is attached / detached, as shown in FIG.
Push the rear end in the direction of arrow C (up to the position where the stopper 13 hits the washer 9). Next, when the retainer 4 is rotated in the direction of arrow E shown in FIG.
The portion hits the groove 15 of the retainer 4. When it is further rotated, a force that pushes up the outer surface of the retainer rod 6 in the direction of arrow F (a direction perpendicular to the movement of the tool 2) by the action of the pressing portion 20 acts and the diameter of the retainer rod 6 insertion hole of the front cover 3 and the retainer rod 6 are increased. The retainer rod 6 moves by an amount half the difference from the shaft diameter φd portion, that is, by the amount of misalignment A. (The load at this time is generated by the Masatsu resistance of the bonding surface between the front cover and the damper.) The retainer rod 6 is provided in the groove 15 of the retainer 4.
Since it is inserted into the retainer 4, the retainer 4 rotates and the tool can be attached and detached. In this way, the retainer rod 6 can be moved in the direction perpendicular to the movement direction of the tool, and the retainer 4 can be rotated to attach or detach the tool.

〔考案の効果〕[Effect of device]

本考案は、リテーナロッドが工具の荷重方向と直角方向
に押し上げられることで、リテーナの回転が行える構造
としたので、通常の打撃動作ではリテーナは開かず、確
実に工具の保持を行う安全な工具保持装置を提供するこ
とができる。The present invention has a structure in which the retainer rod can be rotated by pushing up the retainer rod in a direction perpendicular to the load direction of the tool, so the retainer does not open during normal striking operation, and it is a safe tool that securely holds the tool. A holding device can be provided.

【図面の簡単な説明】[Brief description of drawings]

第１図は、本考案になる電気ハンマドリルの工具保持装
置の一実施例を示す部分縦断側面図、第２図は、第１図
のリテーナロッドＢを押し上げた状態を示す部分縦断側
面図、第３図は第１図のＩ−Ｉ線断面図、第４図は、第
２図のII-II線断面図である。 図において、２は工具、３はフロントカバ、４はリテー
ナ、５はリテーナロッド、６はリテーナロッド、15は
溝、18は穴D1，部の中心線、19は溝Ｌの中心線、20は押
圧部、Ａは芯ずれである。FIG. 1 is a partial vertical sectional side view showing an embodiment of a tool holding device for an electric hammer drill according to the present invention, and FIG. 2 is a partial vertical sectional side view showing a state where a retainer rod B of FIG. 1 is pushed up. 3 is a sectional view taken along the line I-I of FIG. 1, and FIG. 4 is a sectional view taken along the line II-II of FIG. In the figure, 2 is a tool, 3 is a front cover, 4 is a retainer, 5 is a retainer rod, 6 is a retainer rod, 15 is a groove, 18 is a hole D 1 , the center line of the part, 19 is the center line of the groove L, 20 Is a pressing portion and A is a misalignment.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】フロントカバの左右両側に工具の軸心と平
行に且つ軸方向移動可能に配設されたリテーナロッド
と、前記一方のリテーナロッドによりその一端を前記工
具軸心に直角方向に回動可能に支持されその自由端に溝
を形成したリテーナと、該リテーナの溝と係合する他方
のリテーナロッドと、前記リテーナが係合する前記他方
のリテーナロッドの先端部を大径部に形成すると共に該
大径部の後方を小径部に形成し、前記リテーナの係合溝
を前記大径部に係合する穴部と、該穴部と連通し前記小
径部よりも巾広であり且つ前記大径部よりも巾狭な溝と
で形成することで工具の軸方向抜け止めを行うようにし
た工具保持装置において、前記リテーナの前記穴部及び
溝との連通部に押圧部を設け、前記リテーナの回動時に
該押圧部が前記小径部の外面を押圧することで、前記他
方のリテーナロッドの中心を前記穴部の中心線上から前
記溝の中心線上に移動させること特徴とする工具保持装
置。1. A retainer rod disposed on both left and right sides of a front cover so as to be movable in the axial direction in parallel with the axis of the tool, and one of the retainer rods rotates one end thereof in a direction perpendicular to the axis of the tool. A retainer that is movably supported and has a groove formed at its free end, another retainer rod that engages with the groove of the retainer, and a tip portion of the other retainer rod that engages with the retainer are formed in a large diameter portion. And a rear portion of the large diameter portion is formed into a small diameter portion, a hole portion that engages the engagement groove of the retainer with the large diameter portion, and is wider than the small diameter portion and communicates with the hole portion, and In the tool holding device configured to prevent the tool from coming off in the axial direction by forming a groove having a width narrower than the large diameter portion, a pressing portion is provided in a communication portion between the hole and the groove of the retainer, When the retainer is rotated, the pressing portion has the small diameter. By pressing the outer surface, the tool holding device, characterized by moving the center of the other of the retainer rod from the center line of the hole on the center line of the groove.
JP1986024827U 1986-02-21 1986-02-21 Tool holding device Expired - Lifetime JPH078142Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986024827U JPH078142Y2 (en) 1986-02-21 1986-02-21 Tool holding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986024827U JPH078142Y2 (en) 1986-02-21 1986-02-21 Tool holding device

Publications (2)

Publication Number Publication Date
JPS62138583U JPS62138583U (en) 1987-09-01
JPH078142Y2 true JPH078142Y2 (en) 1995-03-01

Family

ID=30824404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986024827U Expired - Lifetime JPH078142Y2 (en) 1986-02-21 1986-02-21 Tool holding device

Country Status (1)

Country Link
JP (1) JPH078142Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4831690U (en) * 1971-08-20 1973-04-17
JPS53135401U (en) * 1977-04-01 1978-10-26

Also Published As

Publication number Publication date
JPS62138583U (en) 1987-09-01

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