JP5463983B2 - Work machine - Google Patents

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JP5463983B2
JP5463983B2 JP2010059517A JP2010059517A JP5463983B2 JP 5463983 B2 JP5463983 B2 JP 5463983B2 JP 2010059517 A JP2010059517 A JP 2010059517A JP 2010059517 A JP2010059517 A JP 2010059517A JP 5463983 B2 JP5463983 B2 JP 5463983B2
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casing
elastic body
frame portion
facing
coil spring
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JP2011189480A (en
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一 後藤
裕人 稲川
健太郎 金谷
義雄 関
知也 池田
智雅 西河
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Koki Holdings Co Ltd
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Hitachi Koki Co Ltd
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Description

本発明は、作業機械、特にエンジンで駆動されるチェンソーやヘッジトリマ等の携帯型の作業機械に関する。   The present invention relates to a work machine, and more particularly to a portable work machine such as a chain saw or a hedge trimmer driven by an engine.

エンジンで駆動されるチェンソー等の作業機械は、エンジンで発生する振動やソーチェン等の切断部分で発生する衝撃の伝達を抑制するための対策が行なわれている。この振動対策としては、例えば特許文献１に示されるチェンソーのように、ソーチェンが取付けられたエンジンを収容するケーシングと、作業者が把持するハンドルを有するフレームとを、複数の防振用コイルバネを介して結合するものがある。   In a work machine such as a chain saw driven by an engine, measures are taken to suppress transmission of vibrations generated by the engine and shocks generated at a cutting portion of the saw chain or the like. As a countermeasure against this vibration, for example, as in a chain saw shown in Patent Document 1, a casing that houses an engine to which a saw chain is attached and a frame that has a handle that is gripped by an operator are interposed via a plurality of vibration-proof coil springs. There are things that combine.

実開平６−３５６９７号公報Japanese Utility Model Publication No. 6-35697

ところで、特許文献１に示されるチェンソーでは、振動低減効果を大きくするためにコイルバネのバネ定数を下げると、切断作業時にガイドバーが変位し易くなり、操作性が悪化する。また、ガイドバーの変位が大きくなり、フレームとケーシングが接触すると却って作業者に伝わる振動が大きくなってしまうという課題があった。   By the way, in the chain saw shown by patent document 1, if the spring constant of a coil spring is lowered in order to enlarge a vibration reduction effect, a guide bar will become easy to displace at the time of a cutting operation, and operativity will deteriorate. In addition, there is a problem in that the displacement of the guide bar increases and vibration transmitted to the operator increases when the frame and the casing come into contact with each other.

本発明は、上記課題に鑑みてなされたものであり、操作性を悪化させることなく、振動を低減することのできる作業機械を提供することを目的とする。   This invention is made | formed in view of the said subject, and it aims at providing the working machine which can reduce a vibration, without deteriorating operability.

上記目的を達成するために、本発明にかかる作業機械は、
作業刃が取付けられるとともに該作業刃を駆動するための動力源を収容するケーシングと、
作業者が把持するハンドルが設けられる、フレーム部と、
前記ケーシングと前記フレーム部との間に設けられ、前記ケーシングと前記フレーム部とを連結する弾性部材と、
前記ケーシングおよび前記フレーム部のいずれか一方に設けられた突出部と、
前記ケーシングおよび前記フレーム部のいずれか他方に設けられ、前記突出部と離間して対向する対向部と、
前記突出部および前記対向部のいずれか一方に設けられた弾性体と、を備え、
前記弾性体は、前記ケーシングと前記フレーム部とが相対変位した場合に、前記突出部および前記対向部のいずれか一方に対する相対位置を保つと共に、前記突出部および前記対向部のいずれか他方と接触して変形する、
ことを特徴とする。 In order to achieve the above object, a work machine according to the present invention includes:
A casing to which a working blade is attached and which houses a power source for driving the working blade;
A frame portion provided with a handle to be gripped by an operator;
Provided between the casing and the frame portion, and the elastic member you connecting the casing and the frame portion,
A projecting portion provided on one of the casing and the frame portion,
A facing portion that is provided on the other of the casing and the frame portion and is spaced apart from the protruding portion;
An elastic body provided on one of the projecting portion and the facing portion ,
When the casing and the frame portion are relatively displaced, the elastic body maintains a relative position with respect to one of the protruding portion and the facing portion, and contacts with the other of the protruding portion and the facing portion. you deformed,
It is characterized by that.

また、前記対向部は、前記ケーシングおよび前記フレーム部のいずれか他方に設けられる穴部から構成され、
前記突出部は、前記穴部の内側に向かって突出してもよい。 Further, the facing portion is configured by a hole provided in one of the casing and the frame portion,
The protrusion may protrude toward the inside of the hole .

さらに、前記弾性体は、前記突出部の外側を覆うように設けられてもよい。 Further, the elastic body, outward may be found provided so as to cover the protruding portion.

さらに、前記弾性体は、前記対向部に設けられてもよい。
また、前記突出部および前記対向部のいずれか他方は、前記ケーシングと前記フレーム部とが相対変位した場合に前記弾性体と接触する当接部材を有してもよい。 Furthermore, the elastic body may be provided in the facing portion.
In addition, the other of the projecting portion and the facing portion may include a contact member that contacts the elastic body when the casing and the frame portion are relatively displaced .

また、前記弾性部材は、コイルバネから構成され、
前記当接部材は、前記コイルバネの一端側を保持する保持部で構成されてもよい。 The elastic member is composed of a coil spring,
The contact member may include a holding portion that holds one end side of the coil spring .

さらに、前記弾性部材はコイルバネから構成され、
前記当接部材は、前記コイルバネの長手方向に沿って延びる円弧状の外壁部を有し、
前記弾性体は、前記当接部材と対向する位置に、前記外壁部に沿った接触部を有してもよい。 Furthermore, the elastic member is composed of a coil spring,
The contact member has an arcuate outer wall portion extending along the longitudinal direction of the coil spring,
The elastic body may have a contact portion along the outer wall portion at a position facing the contact member .

また、前記フレーム部は前記ケーシングに対向する第１の面と、該第１の面に隣接する第２の面と、前記第１の面と隣接し前記第２の面と略平行に設けられる第３の面とを有し、
前記ケーシングには、前記第１の面と前記第２の面、および前記第１の面と前記第３の面、それぞれと離間して対向し、前記フレーム部と前記ケーシングが接近した際に前記第１の面と前記第２の面、及び前記第１の面と前記第３の面とに接触可能な、２つの前記弾性体が設けられてもよい。 The frame portion is provided with a first surface facing the casing, a second surface adjacent to the first surface, and adjacent to the first surface and substantially parallel to the second surface. A third surface,
The casing, the first surface and the second surface, and wherein the first surface and the third surface, facing apart respectively, when the said frame portion casings grayed approaches Two elastic bodies that can contact the first surface and the second surface, and the first surface and the third surface may be provided.

さらに、前記弾性体は、前記第１の面と前記第２の面との接続部、及び前記第1の面と前記第３の面との接続部をそれぞれ覆うように設けられてもよい。 Further, the elastic body may be provided so as to cover a connection portion between the first surface and the second surface and a connection portion between the first surface and the third surface.

本発明による作業機械によれば、ケーシングとフレーム部との間に弾性部材に加えて、ケーシングとフレーム部とが相対変位した際に接触して変形する弾性体を備えるので、操作性を悪化させることなく、振動を低減することができる。 According to the working machine according to the invention, in addition to the elastic member between the casing and the frame portion, so it comprises a resilient member and the casing and the frame portion is deformed in contact upon relative displacement, deteriorating the operability The vibration can be reduced without causing the vibration to occur.

本発明のエンジンチェンソーの部分断面側面図。The partial cross section side view of the engine chain saw of this invention. 図１のエンジンチェンソーのフレーム部の斜視図。The perspective view of the flame | frame part of the engine chain saw of FIG. 図１のＩＩＩ−ＩＩＩ線断面図。III-III sectional view taken on the line of FIG. 図１のエンジンチェンソーの切断作業時の状態を示す部分断面側面図。The partial cross section side view which shows the state at the time of the cutting | disconnection operation | work of the engine chain saw of FIG. 本発明のエンジンチェンソーの変形例を示すケーシングの斜視図。The perspective view of the casing which shows the modification of the engine chain saw of this invention. 図５における第１弾性体部分の要部拡大断面図。The principal part expanded sectional view of the 1st elastic body part in FIG. 本発明のエンジンチェンソーの別の変形例を示すケーシングの斜視図。The perspective view of the casing which shows another modification of the engine chain saw of this invention. 図７における第１弾性体部分の要部拡大断面図。The principal part expanded sectional view of the 1st elastic body part in FIG. 図７の変形例を示す図８に対応する図。The figure corresponding to FIG. 8 which shows the modification of FIG. 図７のエンジンチェンソーの切断作業時の状態を示す側面図。The side view which shows the state at the time of the cutting | disconnection operation | work of the engine chain saw of FIG. 図１０のＸＩ−ＸＩ線断面図。XI-XI sectional view taken on the line of FIG.

以下、本発明の実施形態を添付図面に沿って説明する。図１に示すように、エンジンチェンソー（チェンソー）１は、２サイクルエンジン等のエンジン（動力源）２、キャブレター３、マフラ４を収容するとともにソーチェン（作業刃）５を案内する平板状のガイドバー６、フロントハンドガード７が取付けられたケーシング８と、作業者が把持するフロントハンドル９と、燃料タンク１０と、キャブレター３にストッロルケーブル１１を介して接続されエンジン２の出力を調整するトリガ１２を備えたリアハンドル１３とを備えたフレーム部１４とを備えている。ケーシング８とフレーム部１４との間には、リアハンドル１３のトリガ１２近傍に設けられてケーシング８とフレーム部１４とを連結する第１コイルバネ（第１弾性部材）１５と、フロントハンドル９のエンジン２の近傍に設けられてケーシング８とフレーム部１４とを連結する第２コイルバネ（第１弾性部材）１６と、フレーム部１４のガイドバー６側の端部近傍に設けられてケーシング８とフレーム部１４とを連結する第３コイルバネ（第１弾性部材）１７とが設けられている。なお、第１コイルバネ１５、第２コイルバネ１６、および、第３コイルバネ１７は同一のコイルバネであってもよい。フレーム部１４の第１コイルバネ１５が取付けられた燃料タンク１０の上方（図１中の上方）には断面略半円の円弧状の外壁部１８１を有する突出部材（当接部材）１８が設けられている。なお、突出部材１８の外壁部１８１は第１コイルバネ１５の一部（一端）を覆うように、つまり、外壁部１８１の円弧と第１コイルバネ１５の円周の中心が略一致し、第１コイルバネ１５の取り付け部分は外壁部１８１に覆われるように配置されている。また、ケーシング８のキャブレター３の下方（図１中の上方）には、突出部材１８に対向する位置にエラストマ等の材料から成る第１弾性体（第２弾性部材）１９が、突出部材１８と離間して設けられている。なお、第１弾性体１９の突出部材１８への対向面は略平坦に形成されている。さらに、フレーム部１４の第３コイルバネ１７の連結部分の近傍のリアハンドル１３側（連結部分の図１中の左側）には、フレーム部１４から突出する端部にエラストマ等の材料から成る第２弾性体（第３弾性部材）２０が取付けられた突出部（保持部）２１が設けられている。また、ケーシング８には突出部２１の弾性体２０を囲むように、断面略四角形の穴部２２が弾性体２０と離間して設けられている。なお、穴部２２は、断面略四角形ではなく断面円形状等、突出部２１の弾性体２０を囲むことができる形状であればよい。   Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, an engine chain saw (chain saw) 1 is a flat guide bar that houses an engine (power source) 2 such as a two-cycle engine, a carburetor 3, and a muffler 4 and guides a saw chain (work blade) 5. 6, a casing 8 to which a front hand guard 7 is attached, a front handle 9 gripped by an operator, a fuel tank 10, and a trigger 12 connected to the carburetor 3 via a strap cable 11 for adjusting the output of the engine 2. And a frame portion 14 provided with a rear handle 13 provided with. Between the casing 8 and the frame portion 14, a first coil spring (first elastic member) 15 provided near the trigger 12 of the rear handle 13 to connect the casing 8 and the frame portion 14, and the engine of the front handle 9. 2, a second coil spring (first elastic member) 16 that connects the casing 8 and the frame portion 14, and a casing 8 and the frame portion that are provided near the end of the frame portion 14 on the guide bar 6 side. 14 and a third coil spring (first elastic member) 17 is provided. The first coil spring 15, the second coil spring 16, and the third coil spring 17 may be the same coil spring. Above the fuel tank 10 to which the first coil spring 15 of the frame portion 14 is attached (upward in FIG. 1), a protruding member (contact member) 18 having an arcuate outer wall portion 181 having a substantially semicircular cross section is provided. ing. The outer wall portion 181 of the projecting member 18 covers a part (one end) of the first coil spring 15, that is, the arc of the outer wall portion 181 and the center of the circumference of the first coil spring 15 substantially coincide with each other. The 15 attachment portions are arranged so as to be covered by the outer wall portion 181. A first elastic body (second elastic member) 19 made of a material such as an elastomer is disposed at a position facing the protruding member 18 below the carburetor 3 of the casing 8 (upward in FIG. 1). They are spaced apart. In addition, the opposing surface to the protrusion member 18 of the 1st elastic body 19 is formed substantially flat. Further, on the rear handle 13 side (the left side in FIG. 1 of the connecting portion) of the frame portion 14 in the vicinity of the connecting portion of the third coil spring 17, a second end made of a material such as an elastomer is provided at the end protruding from the frame portion 14. A protruding portion (holding portion) 21 to which an elastic body (third elastic member) 20 is attached is provided. The casing 8 is provided with a hole 22 having a substantially square cross section so as to surround the elastic body 20 of the protruding portion 21 so as to be separated from the elastic body 20. In addition, the hole part 22 should just be the shape which can surround the elastic body 20 of the protrusion part 21, such as a cross-sectional circle shape instead of a substantially square cross section.

図２に示すように、フレーム部１４に設けられたフロントハンドル９のリアハンドル１３側の端部近傍に配置された第１コイルバネ１５と第２コイルバネ１６は図の奥行き方向に延びるように配置され、フロントハンドル９のもう一方の端部近傍に配置された第３コイルバネ１７は第１コイルバネ１５および第２コイルバネ１６と逆方向に（図の手前側）に延びるように配置され、ケーシング８（図１参照）を挟むように支持する。また、ケーシング８に設けられた弾性体２０は断面略円形の円筒形状を有し、ケーシング８から第３コイルバネ１７と同方向（図の手前側）に突出する略円柱状の突出部２１に取付けられている。なお、弾性体２０、突出部２１の形状は、円状でなく四角形等、穴部２２（図１参照）に挿入可能な形状であればよい。   As shown in FIG. 2, the first coil spring 15 and the second coil spring 16 disposed in the vicinity of the end portion of the front handle 9 provided on the frame portion 14 on the rear handle 13 side are disposed so as to extend in the depth direction of the drawing. The third coil spring 17 disposed in the vicinity of the other end of the front handle 9 is disposed so as to extend in the opposite direction (the front side in the figure) to the first coil spring 15 and the second coil spring 16, and the casing 8 (FIG. 1) is supported. The elastic body 20 provided in the casing 8 has a cylindrical shape with a substantially circular cross section, and is attached to a substantially columnar protruding portion 21 protruding from the casing 8 in the same direction as the third coil spring 17 (front side in the figure). It has been. In addition, the shape of the elastic body 20 and the protrusion part 21 should just be a shape which can be inserted in the hole part 22 (refer FIG. 1), such as a square shape instead of circular shape.

図３に示すように、突出部２１の長手方向の略中央には突出部２１の突出量を所定量とするために位置決め突起２３が形成されている。突出部２１の一端（図の上方の端）を位置決め突起２３がフレーム部１４に接触するまで埋め込むことで、所定の突出量を持って突出部２１はフレーム部１４に固定されている。なお、突出部２１の固定は接着剤あるいは図示しない突出部２１の上端に形成された雌ねじにナットを締結する、突出部２１の一端側に形成された雄ねじをフレーム部１４に形成された雌ねじに締結することで行う。また、突出部２１の他端（図の下方の端）には、第２弾性体２０が突出部２１の先端部分を覆うように固定される。なお、突出部２１と第２弾性体２０とは略同軸、つまり、断面視におけるそれぞれの円の中心が略一致するように配置される。また、第２弾性体２０の周囲にはケーシング８に設けられた穴部２２が第２弾性体２０と離間して配置されている。なお、図３では穴部２２がケーシング８を貫通していない構成であるが、穴部２２をケーシング８を貫通する貫通孔としてもよい。   As shown in FIG. 3, a positioning protrusion 23 is formed at a substantially center in the longitudinal direction of the protruding portion 21 so that the protruding amount of the protruding portion 21 is a predetermined amount. By embedding one end (upper end in the figure) of the protruding portion 21 until the positioning protrusion 23 comes into contact with the frame portion 14, the protruding portion 21 is fixed to the frame portion 14 with a predetermined protruding amount. The protrusion 21 is fixed by fastening a nut to an adhesive or a female screw formed at the upper end of the protrusion 21 (not shown), and a male screw formed at one end of the protrusion 21 to a female screw formed in the frame portion 14. It is done by fastening. Further, the second elastic body 20 is fixed to the other end (lower end in the figure) of the protruding portion 21 so as to cover the tip portion of the protruding portion 21. In addition, the protrusion part 21 and the 2nd elastic body 20 are arrange | positioned so that the center of each circle | round | yen in a cross-sectional view may substantially correspond, ie, substantially coaxial. A hole 22 provided in the casing 8 is disposed around the second elastic body 20 so as to be separated from the second elastic body 20. In FIG. 3, the hole portion 22 does not penetrate the casing 8, but the hole portion 22 may be a through hole that penetrates the casing 8.

このように構成されたチェンソー１によれば、切断作業を行っていない場合には、ケーシング８とフレーム部１４との間に第１コイルバネ１５、第２コイルバネ１６、第３コイルバネ１７を介在させているので、エンジン２から作業者が把持するフロントハンドル９およびリアハンドル１３に伝わる振動を絶縁することが可能となる。図４に示すように、切断作業中にガイドバー６に、矢印Ａの方向に力が加わると、第１コイルバネ１５、第２コイルバネ１６、第３コイルバネ１７がそれぞれ変形してフレーム部１４とケーシング８とが相対変位する。そして、フレーム部１４とケーシング８との相対変位が所定量以上になると、第１弾性体１９と突出部材１８とが接触して第１弾性体１９が弾性変形するとともに、第２弾性体２０と穴部２２とが接触して第２弾性体２０が変形する。このため、ガイドバー６から加わる力を第１コイルバネ１５と第２コイルバネ１６と第３コイルバネ１７に加えて第１弾性体１９と第２弾性体２０が受けることになり、ガイドバー６の変位あるいはフレーム部１４とケーシング８との相対変位を規制することが可能となる。特に、第２弾性体２０は周囲を穴部２２に囲まれているので、フレーム部１４とケーシング８との相対変位の方向に係わらず第２弾性体２０が穴部２２に接触させて相対変位を規制することができる。したがって、作業者はガイドバー６の位置あるいは変位量を容易かつ正確に予測することが可能となり、チェンソー１の操作性を大幅に向上させることが可能となる。また、第１弾性体１９および第２弾性体２０にエンジン２からの振動が伝わることで、第１弾性体１９および第２弾性体２０が変形し、作業者が把持するフロントハンドル９およびリアハンドル１３へ伝達される振動を減衰させることが可能となり、より高い振動低減効果を得ることもできる。さらに、切断作業時にケーシング８とフレーム部１４が相対変位した際に第１弾性体１９と最初に接触する位置に突出部材１８或いは第２弾性体２０を設けることにより、ケーシング８とフレーム部１４が接触した際の衝撃を抑制することもできる。さらに、第２弾性体２０を穴部２２で囲んだ構成としたため、ケーシング８とフレーム部１４の相対変位がどの方向に生じても確実にフレーム部１４に伝達される振動を減衰することができる。特に、穴部２２に囲まれた第２弾性体２０の断面を円形とすれば、第２弾性体２０が穴部２２に接触する場合には穴部２２の角に当らず穴部２２の面に接触する。このため第２弾性体２０の変形量を大きく確保することができ、振動減衰効果を高くすることが可能となる。さらに、フレーム部１４とケーシング８とが相対変位した場合には第１弾性体１９と第２弾性体２０が力を受けることになるので、第１コイルバネ１５、第２コイルバネ１６、第３コイルバネ１７のバネ定数を限界まで下げて、すなわち切断作業を行っていない場合にフレーム部１４に対してケーシング８が変位しない程度までバネ定数を下げて、フレーム部１４とケーシング８との相対変位量が所定以下で切断作業を行う場合や切断作業を行っていない場合の振動絶縁効果を大幅に高めることもできる。   According to the chain saw 1 configured as described above, when the cutting operation is not performed, the first coil spring 15, the second coil spring 16, and the third coil spring 17 are interposed between the casing 8 and the frame portion 14. Therefore, it is possible to insulate the vibration transmitted from the engine 2 to the front handle 9 and the rear handle 13 gripped by the operator. As shown in FIG. 4, when a force is applied to the guide bar 6 in the direction of arrow A during the cutting operation, the first coil spring 15, the second coil spring 16, and the third coil spring 17 are deformed and the frame portion 14 and the casing are respectively deformed. 8 and relative displacement. When the relative displacement between the frame portion 14 and the casing 8 reaches a predetermined amount or more, the first elastic body 19 and the protruding member 18 come into contact with each other, the first elastic body 19 is elastically deformed, and the second elastic body 20 The second elastic body 20 is deformed by contact with the hole 22. For this reason, the force applied from the guide bar 6 is applied to the first coil spring 15, the second coil spring 16, and the third coil spring 17, and is received by the first elastic body 19 and the second elastic body 20. The relative displacement between the frame portion 14 and the casing 8 can be restricted. In particular, since the second elastic body 20 is surrounded by the hole portion 22, the second elastic body 20 is brought into contact with the hole portion 22 regardless of the relative displacement direction between the frame portion 14 and the casing 8, thereby causing the relative displacement. Can be regulated. Therefore, the operator can easily and accurately predict the position or displacement amount of the guide bar 6, and the operability of the chain saw 1 can be greatly improved. Further, when the vibration from the engine 2 is transmitted to the first elastic body 19 and the second elastic body 20, the first elastic body 19 and the second elastic body 20 are deformed, and the front handle 9 and the rear handle gripped by the operator. The vibration transmitted to 13 can be attenuated, and a higher vibration reduction effect can be obtained. Further, by providing the protruding member 18 or the second elastic body 20 at a position where the casing 8 and the frame part 14 first come into contact with the first elastic body 19 when the casing 8 and the frame part 14 are relatively displaced during the cutting operation, the casing 8 and the frame part 14 are provided. The impact at the time of contact can also be suppressed. Further, since the second elastic body 20 is surrounded by the hole portion 22, the vibration transmitted to the frame portion 14 can be surely attenuated regardless of the direction in which the relative displacement between the casing 8 and the frame portion 14 occurs. . In particular, if the cross section of the second elastic body 20 surrounded by the hole portion 22 is circular, when the second elastic body 20 contacts the hole portion 22, the surface of the hole portion 22 does not hit the corner of the hole portion 22. To touch. For this reason, a large deformation amount of the second elastic body 20 can be secured, and the vibration damping effect can be enhanced. Further, when the frame portion 14 and the casing 8 are relatively displaced, the first elastic body 19 and the second elastic body 20 receive a force, so the first coil spring 15, the second coil spring 16, and the third coil spring 17. The spring constant is lowered to a limit, that is, when the cutting operation is not performed, the spring constant is lowered to such an extent that the casing 8 is not displaced relative to the frame portion 14, and the relative displacement amount between the frame portion 14 and the casing 8 is predetermined. In the following, the vibration insulation effect when performing the cutting operation or when the cutting operation is not performed can be greatly enhanced.

さらに、第１弾性体１９と当接する突出部材１８を第１コイルバネ１５の一端を保持（第１コイルバネ１５の一端側をフレーム部１４に固定）する部分と兼用することにより、部品点数の増加や振動低減構造を複雑にすることなく、簡単な構成で振動低減を実現することができる。   Furthermore, by using the projecting member 18 in contact with the first elastic body 19 as a part for holding one end of the first coil spring 15 (fixing one end side of the first coil spring 15 to the frame portion 14), the number of parts can be increased. Vibration can be reduced with a simple configuration without complicating the vibration reduction structure.

なお、上述の第１弾性体１９は突出部材１８への対向面が略平坦に形成されていたが、第１弾性体１９の構成はこの形状に限られるものでは無い。例えば、図５に示すように、第１弾性体１１９は、突出部材１８（図２参照）の外壁部１８１（図２参照）の円弧に対応して湾曲した凹溝１９１を有してもよい。そして、第１弾性体１１９は、突出部材１８の外壁部１８１に凹溝１９１が対向するように離間してケーシング８に取付ける。なお、第１弾性体１１９には、図６に示すように、それぞれ抜け止め突起２４を有する２つの接続部２５が一体に形成されている。そして、第１弾性体１１９の接続部２５をケーシング８に形成された孔２６に挿入し、抜け止め突起２４が孔２６を通過してケーシング８に係止されることで、第１弾性体１１９はケーシング８に固定される。   In addition, although the above-mentioned 1st elastic body 19 was formed in the substantially flat surface facing the protrusion member 18, the structure of the 1st elastic body 19 is not restricted to this shape. For example, as shown in FIG. 5, the first elastic body 119 may have a concave groove 191 that is curved corresponding to the arc of the outer wall portion 181 (see FIG. 2) of the protruding member 18 (see FIG. 2). . The first elastic body 119 is attached to the casing 8 so as to be separated from the outer wall 181 of the protruding member 18 so that the concave groove 191 faces the outer wall 181. As shown in FIG. 6, the first elastic body 119 is integrally formed with two connection portions 25 each having a retaining protrusion 24. Then, the connecting portion 25 of the first elastic body 119 is inserted into the hole 26 formed in the casing 8, and the retaining protrusion 24 passes through the hole 26 and is locked to the casing 8, thereby the first elastic body 119. Is fixed to the casing 8.

このような構成の場合には、上述と同様効果に加えて、ケーシング８とフレーム部（図示せず）とが矢印Ｂに示す方向（ガイドバー６の長手方向に沿った方向）に相対変位した場合でも、第１弾性体１１９の凹溝１９１の内周と突出部材１８の外壁部１８１とが接触することになる。したがって、矢印Ｂ方向の相対変位の拘束を強めることが可能となり、矢印Ｂ方向の所定量以上の相対変位を規制できるようになり、操作性をより向上させることが可能となる。また、矢印Ｂ方向の振動も第１弾性体１１９に伝達されるため、振動減衰特性をより向上させることができる。   In the case of such a configuration, in addition to the same effects as described above, the casing 8 and the frame portion (not shown) are relatively displaced in the direction indicated by the arrow B (the direction along the longitudinal direction of the guide bar 6). Even in this case, the inner periphery of the concave groove 191 of the first elastic body 119 and the outer wall portion 181 of the protruding member 18 come into contact with each other. Therefore, it becomes possible to strengthen the restraint of the relative displacement in the direction of arrow B, and it becomes possible to regulate the relative displacement of a predetermined amount or more in the direction of arrow B, and it becomes possible to further improve the operability. In addition, since vibration in the direction of arrow B is also transmitted to the first elastic body 119, vibration damping characteristics can be further improved.

また、図７に示すように、第１弾性体２１９をキャブレター収容部３１のケーシング８の幅方向（各コイルバネの延びる方向と略平行な方向）の両端部に設けても良い。第１弾性体２１９は、図８に示すように、図の下方のフレーム部（図示せず）に対向する部分に、互いに内側を向くように傾斜した傾斜面２２０を有している。そして、傾斜面２２０がフレーム部と離間するようにケーシング８に取付けられる。第１弾性体２１９には、それぞれ抜け止め突起２２２を有する接続部２２１が一体に形成されている。そして、第１弾性体２１９の接続部２２１をケーシング８に形成された孔８１に挿入し、抜け止め突起２２２が孔８１を通過してケーシング８に係止されることで、第１弾性体２１９はケーシング８に固定される。なお、図９に示すように、第１弾性体２１９に穴部２２５を形成してボルト２２３を挿入してケーシング８の貫通孔８１を貫通させてナット２２４を締結することで固定してもよい。   Further, as shown in FIG. 7, the first elastic bodies 219 may be provided at both ends of the carburetor housing 31 in the width direction of the casing 8 (direction substantially parallel to the direction in which each coil spring extends). As shown in FIG. 8, the first elastic body 219 has inclined surfaces 220 that are inclined so as to face each other at a portion facing a lower frame portion (not shown) in the drawing. Then, the inclined surface 220 is attached to the casing 8 so as to be separated from the frame portion. The first elastic body 219 is integrally formed with a connecting portion 221 having a retaining protrusion 222. Then, the connection portion 221 of the first elastic body 219 is inserted into the hole 81 formed in the casing 8, and the retaining protrusion 222 passes through the hole 81 and is locked to the casing 8, thereby the first elastic body 219. Is fixed to the casing 8. In addition, as shown in FIG. 9, you may fix by forming the hole 225 in the 1st elastic body 219, inserting the volt | bolt 223, penetrating the through-hole 81 of the casing 8, and fastening the nut 224. FIG. .

このような構成の場合には、上述と同様の効果を得られるほかに、図１０に示すように木材３３０の切断作業時にガイドバー６に力が加わり、ケーシング８とフレーム部１４が相対変位すると、第１弾性体２１９がフレーム部１４に接触する。この時、図１１に示すように、一方の第１弾性体２１９がフレーム部１４のケーシング８に対向する第１の面１４１と、第１の面１４１に隣接する第２の面１４２の両方に接触するとともに、他方の弾性体２１９が第１の面１４１と第１の面１４１と隣接し第２の面１４２と略平行または対向するように設けられた第３の面１４３との両方に接触する。このため、フレーム部１４を３つの面１４１、１４２、１４３で拘束することができ、矢印Ｃ方向、矢印Ｄ方向、矢印Ｅ方向の相対変位を拘束および規制をすることが可能となり、操作性を大幅に向上させることが可能となる。また、接触部分が増えるため、振動が第１弾性体２１９に伝達されやすくなり、振動減衰特性をより向上させることができる。特に、２つの第１弾性体２１９をそれぞれ、第１の面１４１と第２の面１４２の接続部と、第１の面１４１と第３の面１４３の接続部、すなわち、各面によって形成された角部に当接する位置に設けることにより、矢印Ｃ乃至Ｅ方向の相対変位を効果的に規制することができる。さらに、図１１に示すように、ケーシング８の幅方向の寸法は、フレーム部１４の幅方向の寸法より大きく構成されているため、第１弾性体２１９に、互いに対向する傾斜面２２０（図８、９参照）を設けることにより、ケーシング８とフレーム部１４の相対変位が生じた際に第１弾性体２１９がフレーム部１４（角部）を確実に受けることができるため、振動減衰効果を向上させることができる。   In the case of such a configuration, in addition to obtaining the same effect as described above, when the force is applied to the guide bar 6 during the cutting operation of the wood 330 as shown in FIG. 10, the casing 8 and the frame portion 14 are relatively displaced. The first elastic body 219 comes into contact with the frame portion 14. At this time, as shown in FIG. 11, one first elastic body 219 is formed on both the first surface 141 facing the casing 8 of the frame portion 14 and the second surface 142 adjacent to the first surface 141. The other elastic body 219 is in contact with both the first surface 141 and the third surface 143 provided adjacent to the first surface 141 and substantially parallel to or opposed to the second surface 142. To do. Therefore, the frame portion 14 can be restrained by the three surfaces 141, 142, and 143, and the relative displacement in the arrow C direction, the arrow D direction, and the arrow E direction can be restrained and restricted. It becomes possible to greatly improve. In addition, since the number of contact portions increases, vibration is easily transmitted to the first elastic body 219, and vibration damping characteristics can be further improved. In particular, the two first elastic bodies 219 are formed by a connection portion between the first surface 141 and the second surface 142 and a connection portion between the first surface 141 and the third surface 143, that is, each surface. By providing at a position that contacts the corner portion, the relative displacement in the directions of arrows C to E can be effectively regulated. Furthermore, as shown in FIG. 11, since the dimension in the width direction of the casing 8 is larger than the dimension in the width direction of the frame portion 14, the inclined surfaces 220 (FIG. 8) facing the first elastic body 219. 9), the first elastic body 219 can reliably receive the frame portion 14 (corner portion) when the relative displacement between the casing 8 and the frame portion 14 occurs, thereby improving the vibration damping effect. Can be made.

上記した実施の形態では、第１弾性部材となるコイルバネの他に、ケーシング８とフレーム部１４が相対変化した際に作用する第２弾性部材（第１弾性体）１９、第３弾性体（第２弾性体）２０を設けた構成について説明したが、相対変化した際に作用する弾性部材を設ける構成であればいずれか一方であってもよい。   In the above-described embodiment, in addition to the coil spring serving as the first elastic member, the second elastic member (first elastic body) 19 and the third elastic body (the first elastic body) that act when the casing 8 and the frame portion 14 change relatively. Although the structure provided with the (2 elastic body) 20 was demonstrated, any one may be sufficient if it is the structure which provides the elastic member which acts when it changes relatively.

なお、チェンソー１の駆動源はエンジン２に限られるものでは無く、電動モータを駆動源とするチェンソー１であってもよく、本体（ケーシング）とハンドル（フレーム部）とがコイルバネ等の弾性部材で接続され、互いが相対変化する構成のものであればよい。さらに、第１弾性体１９、１１９、２１９あるいは第２弾性体２０をチェンソーだけでなくをブロワ、ヘッジトリマ等の各種のエンジンを駆動源とする作業機械または電動モータを駆動源とする作業機械に適用してもよい。   The drive source of the chain saw 1 is not limited to the engine 2 but may be the chain saw 1 using an electric motor as the drive source. The main body (casing) and the handle (frame portion) are elastic members such as coil springs. What is necessary is just a structure of being connected and mutually changing relatively. Further, the first elastic body 19, 119, 219 or the second elastic body 20 is applied not only to a chain saw but also to a work machine using various engines such as a blower and a hedge trimmer as a drive source or a work machine using an electric motor as a drive source. May be.

１ エンジンチェンソー
２ エンジン
５ ソーチェン
６ ガイドバー
７ フロントハンドガード
８ ケーシング
９ フロントハンドル
１３ リアハンドル
１４ フレーム部
１５ 第１コイルバネ
１６ 第２コイルバネ
１７ 第３コイルバネ
１８ 突出部材
１９ 第１弾性体
２０ 第２弾性体
２１ 突出部
２２ 穴部
２３ 位置決め突起
１８１ 外壁部 1 engine chain saw 2 engine 5 saw chain 6 guide bar 7 front hand guard 8 casing 9 front handle 13 rear handle 14 frame 15 first coil spring 16 second coil spring 17 third coil spring 18 projecting member 19 first elastic body 20 second elastic body 21 Projection 22 Hole 23 Positioning Projection 181 Outer Wall

Claims (9)

作業刃が取付けられるとともに該作業刃を駆動するための動力源を収容するケーシングと、
作業者が把持するハンドルが設けられる、フレーム部と、
前記ケーシングと前記フレーム部との間に設けられ、前記ケーシングと前記フレーム部とを連結する弾性部材と、
前記ケーシングおよび前記フレーム部のいずれか一方に設けられた突出部と、
前記ケーシングおよび前記フレーム部のいずれか他方に設けられ、前記突出部と離間して対向する対向部と、
前記突出部および前記対向部のいずれか一方に設けられた弾性体と、を備え、
前記弾性体は、前記ケーシングと前記フレーム部とが相対変位した場合に、前記突出部および前記対向部のいずれか一方に対する相対位置を保つと共に、前記突出部および前記対向部のいずれか他方と接触して変形する、
ことを特徴とする作業機械。 A casing to which a working blade is attached and which houses a power source for driving the working blade;
A frame portion provided with a handle to be gripped by an operator;
Provided between the casing and the frame portion, and the elastic member you connecting the casing and the frame portion,
A projecting portion provided on one of the casing and the frame portion,
A facing portion that is provided on the other of the casing and the frame portion and is spaced apart from the protruding portion;
An elastic body provided on one of the projecting portion and the facing portion ,
When the casing and the frame portion are relatively displaced, the elastic body maintains a relative position with respect to one of the protruding portion and the facing portion, and contacts with the other of the protruding portion and the facing portion. you deformed,
A working machine characterized by that. 前記対向部は、前記ケーシングおよび前記フレーム部のいずれか他方に設けられる穴部から構成され、
前記突出部は、前記穴部の内側に向かって突出する、
ことを特徴とする請求項１に記載の作業機械。 The facing portion is constituted by a hole provided in any other side of the casing and the frame portion,
The protrusion that protrudes toward the inside of the hole,
The work machine according to claim 1 , wherein: 前記弾性体は、前記突出部の外側を覆うように設けられる、
ことを特徴とする請求項２に記載の作業機械。 Before SL elastic body is provided so as to cover the outer side of the projecting portion,
The work machine according to claim 2 . 前記弾性体は、前記対向部に設けられる、  The elastic body is provided in the facing portion.
ことを特徴とする、請求項１に記載の作業機械。  The work machine according to claim 1, wherein: 前記突出部および前記対向部のいずれか他方は、前記ケーシングと前記フレーム部とが相対変位した場合に前記弾性体と接触する、当接部材を有する、
ことを特徴とする請求項１または４に記載の作業機械。 The other of the projecting portion and the opposing portion, the contact with the elastic member when the front Symbol casing and the frame portion are relatively displaced, having a contact member,
The work machine according to claim 1 or 4 , characterized in that. 前記弾性部材は、コイルバネから構成され、
前記当接部材は、前記コイルバネの一端側を保持する保持部で構成される、
ことを特徴とする請求項５に記載の作業機械。 Before Symbol bullets member is composed of a coil spring,
The contact member is configured by a holding portion that holds one end side of the coil spring.
The work machine according to claim 5 . 前記弾性部材はコイルバネから構成され、
前記当接部材は、前記コイルバネの長手方向に沿って延びる円弧状の外壁部を有し、
前記弾性体は、前記当接部材と対向する位置に、前記外壁部に沿った接触部を有する、
ことを特徴とする請求項５又は６に記載の作業機械。 Before Symbol bullets member is composed of a coil spring,
The contact member has an arcuate outer wall portion extending along the longitudinal direction of the coil spring,
The elastic body has a contact portion along the outer wall portion at a position facing the contact member.
The work machine according to claim 5 or 6 , characterized in that. 前記フレーム部は前記ケーシングに対向する第１の面と、該第１の面に隣接する第２の面と、前記第１の面と隣接し前記第２の面と略平行に設けられる第３の面とを有し、
前記ケーシングには、前記第１の面と前記第２の面、および前記第１の面と前記第３の面、それぞれと離間して対向し、前記フレーム部と前記ケーシングが接近した際に前記第１の面と前記第２の面、及び前記第１の面と前記第３の面とに接触可能な、２つの前記弾性体が設けられる、
ことを特徴とする請求項１乃至７のいずれか一項に記載の作業機械。 The frame portion includes a first surface facing the casing, a second surface adjacent to the first surface, and a third surface adjacent to the first surface and substantially parallel to the second surface. And has a surface
The casing, the first surface and the second surface, and wherein the first surface and the third surface, facing apart respectively, when the said frame portion casings grayed approaches Two elastic bodies that can contact the first surface and the second surface, and the first surface and the third surface are provided,
A work machine according to any one of claims 1 to 7 , wherein 前記弾性体は、前記第１の面と前記第２の面との接続部、及び前記第1の面と前記第３の面との接続部をそれぞれ覆うように設けられる、
ことを特徴とする請求項８に記載の作業機械。 The elastic body is provided so as to cover a connection portion between the first surface and the second surface, and a connection portion between the first surface and the third surface, respectively.
The work machine according to claim 8 , wherein:
JP2010059517A 2010-03-16 2010-03-16 Work machine Expired - Fee Related JP5463983B2 (en)

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