JPH0385336A - Portable working machine - Google Patents

Portable working machine

Info

Publication number
JPH0385336A
JPH0385336A JP1222522A JP22252289A JPH0385336A JP H0385336 A JPH0385336 A JP H0385336A JP 1222522 A JP1222522 A JP 1222522A JP 22252289 A JP22252289 A JP 22252289A JP H0385336 A JPH0385336 A JP H0385336A
Authority
JP
Japan
Prior art keywords
throttle
handle
internal combustion
combustion engine
throttle valve
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
Application number
JP1222522A
Other languages
Japanese (ja)
Other versions
JP2790254B2 (en
Inventor
Akira Nagashima
彬 長島
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.)
Kioritz Corp
Original Assignee
Kioritz Corp
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 Kioritz Corp filed Critical Kioritz Corp
Priority to JP1222522A priority Critical patent/JP2790254B2/en
Publication of JPH0385336A publication Critical patent/JPH0385336A/en
Application granted granted Critical
Publication of JP2790254B2 publication Critical patent/JP2790254B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Harvester Elements (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

PURPOSE:To improve the working and operational performance in a portable working machine and the like wherein the handle side is relatively displaced with respect to the body side including the working member by providing the machine with a actuator opening a throttle valve further than at the specified intermediate degree while detecting relative displacement. CONSTITUTION:A mowing machine comprises an internal combustion engine 1, operation rod 6 wherein a power transmission shaft 5 is inserted, body 4 including a mowing blade 7 as a working member, U-like handle 8 arranged at a proper position of the operation rod 6 and the like with the side of the handle 8 relatively displaced with respect to the side of the body 4. The revolution of the internal combustion engine is controlled by a throttle operating means 12. In this case, a throttle valve is made to capable of opening to the extent of the specified opening degree by operating the throttle operating means 12. In addition, the throttle valve is made to open further than the intermediate opening degree mentioned above while detecting relative displacement by means of an actuator 22 by providing a means 18 for detecting the relative displacement exceeding the specified displacement value of the side of the handle 8.

Description

【発明の詳細な説明】 【産業上の利用分野] 本発明は、刈払機、ヘラジトリマー、チェーンソーなど
の内燃機関を原動機とした携帯用作業機に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a portable working machine powered by an internal combustion engine, such as a brush cutter, a hedge trimmer, and a chainsaw.

[従来の技術] 従来、この種の携帯用作業機では、使用者の操作により
内燃機関のスロットルバルブを全開まで開くスロットル
操作手段が設けられていた。
[Prior Art] Conventionally, this type of portable working machine has been provided with a throttle operating means for opening a throttle valve of an internal combustion engine to a fully open position by a user's operation.

[発明が解決しようとする課題] このような従来の携帯用作業機では、使用者が前記スロ
ットル操作手段を握る等して操作することによってスロ
ットルバルブを全開にすることができるので、負荷が比
較的軽い普通の作業時にもスロットルバルブを全開にし
てしまうことが多く、このため、内燃機関の回転数が必
要以上に高くなり、騒音の増大と燃費の悪化を招いてい
た。一方。
[Problems to be Solved by the Invention] In such conventional portable work machines, the user can fully open the throttle valve by gripping or operating the throttle operating means, so the load is relatively low. The throttle valve is often left fully open even during light and ordinary work, which causes the internal combustion engine's rotational speed to become higher than necessary, leading to increased noise and deterioration of fuel efficiency. on the other hand.

これを避けるために、負荷が比較的軽い普通作業時にス
ロットルバルブを全開にせずに中間開度にしておいた場
合には、急に負荷が重くなった際に内燃機関の回転数が
下がって適切な作業を行うことができなかった。したが
って、この場合には、作業者は負荷が変化する度にいち
いちスロットル操作手段を操作してスロットルバルブを
開閉しなければならず、煩わしかった。
To avoid this, if you do not fully open the throttle valve during normal work with a relatively light load, but leave it at an intermediate opening, when the load suddenly becomes heavy, the internal combustion engine's rotational speed will drop to an appropriate level. I was unable to do any work. Therefore, in this case, the operator has to operate the throttle operating means to open and close the throttle valve each time the load changes, which is cumbersome.

本発明は、このような従来技術の不都合を解消するもの
で、負荷が比較的軽い普通の作業時には内燃機関の回転
数が必要以上に高くならず、li音及び燃費の低減を図
ることができるとともに1重負荷がかかったときには自
動的にスロットルバルブが大きく開き、適切な作業を行
うことができるとともに操作性の向上を図ることができ
る携帯用作業機を提供しようとするものである。
The present invention solves these disadvantages of the conventional technology, and prevents the rotational speed of the internal combustion engine from becoming higher than necessary during ordinary work with a relatively light load, thereby reducing roaring noise and fuel consumption. In addition, it is an object of the present invention to provide a portable working machine that automatically widens the throttle valve when a single load is applied, allowing appropriate work to be performed and improving operability.

[課題を解決するための手段] 前記した課題を解決するため、本発明は、内燃機関を原
動機とし、重負荷時にハンドル側が作業部材を含む本体
側に対して相対変位する携帯用作業機において、使用者
の操作により前記内燃機関のスロットルバルブを所定の
中間開度まで開くスロットル操作手段と、前記本体側に
対する前記ハンドル側の所定値を越える相対変位の有無
を検知する検知手段と、該検知手段の検知信号を受けて
前記相対変位が生じたときに前記スロットル操作手段の
操作状態にかかわらず前記スロットルバルブを前記中間
開度よりさらに開いた開度に開くアクチュエータとを設
けた構成としたものである。
[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a portable working machine which uses an internal combustion engine as a prime mover and whose handle side is displaced relative to the main body side including a working member during heavy loads. Throttle operating means for opening the throttle valve of the internal combustion engine to a predetermined intermediate opening degree by a user's operation; a detecting means for detecting the presence or absence of a relative displacement of the handle side with respect to the main body side that exceeds a predetermined value; and the detecting means and an actuator that opens the throttle valve to an opening further open than the intermediate opening, regardless of the operating state of the throttle operating means when the relative displacement occurs in response to a detection signal. be.

[作 用] 本発明では、前述した従来の携帯用作業機と異なり、使
用者の操作により内燃機関のスロットルバルブを所定の
中間開度まで開くスロットル操作手段が設けられている
ので、該スロットル操作手段を使用者が操作してもスロ
ットルバルブを所定の中間開度までしか開けず、全開な
どのように大きく開くことはできない、したがって、負
荷が比較的軽い普通の作業時には内燃機関の回転数が必
要以上に高くならない、また、本発明によれば重負荷時
には、ハンドル側が作業部材を含む本体側に対して相対
変位し、この相対変位が検知手段によって検知され、該
検知手段の検知信号に基づいてアクチュエータが作動し
、該アクチュエータによって、前記スロットル操作手段
の操作状態にかかわらず、前記スロットルバルブが前記
中間開度よりさらに開いた開度に開かれる。すなわち、
重負荷時には、自動的にスロットルバルブが前記中間開
度を超えて大きく開かれることとなる。
[Function] Unlike the conventional portable working machine described above, the present invention is provided with a throttle operating means that opens the throttle valve of the internal combustion engine to a predetermined intermediate opening degree by the user's operation. Even if the user operates the means, the throttle valve can only be opened to a predetermined intermediate opening, and cannot be opened wide such as fully open. Therefore, during normal work with a relatively light load, the rotational speed of the internal combustion engine will be According to the present invention, when the load is heavy, the handle side is displaced relative to the main body side including the working member, this relative displacement is detected by the detection means, and based on the detection signal of the detection means. The actuator operates, and the actuator opens the throttle valve to an opening degree wider than the intermediate opening degree, regardless of the operating state of the throttle operating means. That is,
When the load is heavy, the throttle valve is automatically opened wide beyond the intermediate opening.

[実施例] 以下、本発明を刈払機Aに適用した実施例について図面
に基づき説明する。
[Example] Hereinafter, an example in which the present invention is applied to a brush cutter A will be described based on the drawings.

第1図は前記草刈機Aの斜視全体図、第2図はその要部
を示す一部切欠縦断面図、第3図はスロットルバルブ動
作説明図である。
FIG. 1 is a perspective overall view of the mower A, FIG. 2 is a partially cutaway vertical cross-sectional view showing the main parts thereof, and FIG. 3 is a diagram illustrating the operation of the throttle valve.

前記草刈機Aは、第1図に示すように、原動機たるリコ
イルスタータ2や燃料タンク3などが設けられた小型の
空冷2サイクルエンジン等の内燃機関1、該内燃機関1
から延長された伝動軸5゜該伝動軸5を内蔵し前記内燃
機関l側に固定した操作枠6、及び該操作枠6の先端に
回転自在に設けられた作業部材たる刈刃7とを含む本体
4と、前記操作枠6の適位置に設けられたU字状のハン
ドル8等によって構成されている。
As shown in FIG. 1, the mower A includes an internal combustion engine 1 such as a small air-cooled two-stroke engine equipped with a recoil starter 2 as a prime mover, a fuel tank 3, etc.
A transmission shaft 5° extending from the transmission shaft 5 includes an operating frame 6 which houses the transmission shaft 5 and is fixed to the internal combustion engine l side, and a cutting blade 7 which is a working member rotatably provided at the tip of the operating frame 6. It is composed of a main body 4, a U-shaped handle 8 provided at an appropriate position on the operation frame 6, and the like.

そして、重負荷時に前記ハンドル8側が前記本体4側に
対して相対変位するように構成されている。
The handle 8 side is configured to be displaced relative to the main body 4 side when a heavy load is applied.

すなわち、図面実施例の場合、第2図に示すように、前
記ハンドル8の中央部にコ字状の取付金具9が固定され
、前記操作枠6に環状の取付金具10が固定され、これ
らの取付金具9及び10間がゴム製等の防振材11を介
して取り付けられている。
That is, in the case of the embodiment shown in the drawings, as shown in FIG. The mounting brackets 9 and 10 are attached via a vibration isolating material 11 made of rubber or the like.

したがって、使用者がハンドル8を把持して作業してい
る際に刈刃7に重負荷がかかると、使用者がハンドル8
に大きな力を加えることとなり、この結果、前記防振材
11が変形して、ハンドル8及び取付金具9が本体4側
の操作枠6及び取付金具10に対して相対変位するもの
である。なお、前記防振材11は、内燃機関1や刈刃7
から発生する振動を吸収し、ハンドル8に振動が伝わら
ぬようにする作用をも担うものである。
Therefore, if a heavy load is applied to the cutting blade 7 while the user is gripping the handle 8 while working, the user may
As a result, the vibration isolating material 11 is deformed, and the handle 8 and the mounting bracket 9 are displaced relative to the operating frame 6 and the mounting bracket 10 on the main body 4 side. Note that the vibration isolating material 11 is used for the internal combustion engine 1 and the cutting blade 7.
It also has the function of absorbing vibrations generated from the handle 8 and preventing the vibrations from being transmitted to the handle 8.

また、使用者の操作により前記内燃機関1のスロットル
バルブ15を所定の中間開度まで開くスロットル操作手
段12が設けられている0図面実施例の場合、該スロッ
トル操作手段12は、第1図及び第3図に示すように前
記ハンドル8に取付けられたスロットル操作レバー13
と、一端が該スロットル操作レバー13に係止されたス
ロットルワイヤー14と、前記スロットルバルブ15に
固着されるとともに前記スロットルワイヤー14の他端
が係止されたスロットルレバー16等からなる連動機構
(図示せず)とから構成されている。なお前記スロット
ルワイヤー14は、その両端部を除いてアウターチュー
ブ17で覆われている。そして、前記スロットル操作手
段12によって、第3図に示すように、前記スロットル
レバー16が全閉位置■、中間開度位置■又は全開位置
■にあるときには、前記スロットルバルブ15がそれぞ
れ全閉、所定の中間開度又は全開とされるようになって
いる。また、前記スロットルレバー16は反時計方向に
図示しないばねによって、前記内燃機関1のアイドル回
転に対応する前記全閉位置の側へ付勢されている。さら
に、前記スロットル操作レバー13は1図示しないスト
ッパー等により操作範囲が制限されており、前記スロッ
トル操作レバー13の操作による前記スロットルレバー
16の連動範囲は、前記全閉位置■から中間開度位置■
までに設定されている。なお、この中間開度位置■は、
負荷が比較的軽い普通の作業時に必要な内燃機関の回転
数に対応して定められている。
Further, in the case of the embodiment shown in FIG. 1, in which a throttle operating means 12 is provided which opens the throttle valve 15 of the internal combustion engine 1 to a predetermined intermediate opening degree by the user's operation, the throttle operating means 12 is provided with the throttle operating means 12 shown in FIG. As shown in FIG. 3, a throttle operating lever 13 is attached to the handle 8.
An interlocking mechanism (see FIG. (not shown). Note that the throttle wire 14 is covered with an outer tube 17 except for both ends thereof. Then, as shown in FIG. 3, when the throttle lever 16 is in the fully closed position (2), the intermediate opening position (2), or the fully open position (2), the throttle valve 15 is controlled by the throttle operating means 12, respectively. It is designed to be opened at an intermediate opening or fully open. Further, the throttle lever 16 is biased counterclockwise by a spring (not shown) toward the fully closed position corresponding to the idling rotation of the internal combustion engine 1. Further, the operating range of the throttle operating lever 13 is limited by a stopper (not shown), etc., and the interlocking range of the throttle lever 16 by operating the throttle operating lever 13 is from the fully closed position (1) to the intermediate opening position (2).
has been set up to. In addition, this intermediate opening position ■ is
It is determined in accordance with the rotational speed of the internal combustion engine required during normal work with a relatively light load.

さらに、前記本体4側に対する前記ハンドル8側の所定
値を越える相対変位を検知する検知手段18が設けられ
ている0図実施例の場合、該検知手段18としていわゆ
る触手式レバースイッチが用いられ、第2図に示すよう
に、そのスイッチ本体19が前記操作枠6側の取付金具
10に固定されるとともに、その可撓性触手20の先端
が前記ハンドル8側の取付金具9に検出すべき変位量に
応じて前記触手20より大径に設けた孔21内に挿通さ
れている。
Further, in the case of the embodiment shown in FIG. 0, which is provided with a detection means 18 for detecting a relative displacement exceeding a predetermined value on the side of the handle 8 with respect to the side of the main body 4, a so-called tentacle type lever switch is used as the detection means 18, As shown in FIG. 2, the switch body 19 is fixed to the mounting bracket 10 on the operation frame 6 side, and the tip of the flexible tentacle 20 is attached to the mounting bracket 9 on the handle 8 side to detect the displacement. The tentacles are inserted into holes 21 having a diameter larger than that of the tentacles 20 depending on the size of the tentacles.

前記レバースイッチは、スイッチ本体19に対して触手
20が傾斜したときに、スイッチ本体19に内蔵された
電気接点(図示せず)の導通・不導通状態が切り換わる
ものである。したがって1図面実施例の場合、本体4側
の操作枠6及び取付金具10に対してハンドル8及び取
付金具9が相対的に変位すると、前記触手20の先端が
取付金具9の孔21の周囲によって押され、触手20が
傾斜し、スイッチ本体19内の電気接点が切り換わって
前記相対変位の有無が検知されるものである。
In the lever switch, when the tentacle 20 is tilted with respect to the switch body 19, electrical contacts (not shown) built in the switch body 19 are switched between conductive and non-conductive states. Therefore, in the case of the embodiment shown in FIG. When the tentacle 20 is pressed, the tentacle 20 is tilted, and the electrical contacts in the switch body 19 are switched to detect the presence or absence of the relative displacement.

もっとも、検知手段18は前記レバースイッチに限定さ
れるものではない。
However, the detection means 18 is not limited to the lever switch.

さらにまた、前記相対変位が生じたときに、前記検知手
段18の検知信号を受けて前記スロットル操作手段12
の操作状態にかかわらず、前記スロットルバルブ15を
前記中間開度よりさらに開いた開度に開くアクチュエー
タ22が設けられている。図面実施例の場合、該アクチ
ュエータ22として電、磁ソレノイドが用いられ、第3
1i!iに示す如く、前記スロットルレバー16の付近
に固定されるとともに。
Furthermore, when the relative displacement occurs, the throttle operation means 12 receives a detection signal from the detection means 18.
An actuator 22 is provided that opens the throttle valve 15 to an opening degree further open than the intermediate opening degree, regardless of the operating state of the throttle valve 15 . In the case of the embodiment shown in the drawings, an electric or magnetic solenoid is used as the actuator 22, and the third
1i! As shown in i, it is fixed near the throttle lever 16.

その作動ロッド23がワイヤー24を介して前記スロッ
トルレバー16に連結されており、通電時には、前記作
動ロッド23が引かれてスロットルレバー16が全開位
置■まで回動させられ1通電を遮断したときには、前記
作動ロッド23が突出自在となってスロットルバルブ1
5が全閉位置■までばね付勢力によって回動可能となる
ようにされている。なお。
The actuating rod 23 is connected to the throttle lever 16 via a wire 24, and when energized, the actuating rod 23 is pulled and the throttle lever 16 is rotated to the fully open position (1), and when the energization is cut off, The operating rod 23 can freely protrude and open the throttle valve 1.
5 can be rotated by a spring biasing force to a fully closed position (2). In addition.

作動ロッド23が引かれた際にスロットルバルブ15が
必ずしも全開位置■まで回動させられる必要はなく、そ
の手前まで回動させられるようにしておいてもよい、そ
して、前記アクチュエータ2またる電磁ソレノイドは、
図示しない電気制御回路に接続され、前記検知手段18
たるレバースイッチの電気接点の導通・不導通状態が短
時間で連続して切り換わったときには通電が維持される
とともに、レバースイッチの電気接点がもとの状態に一
定時間の間復帰したときには通電が遮断されるようにな
っている。なお、前記電気制御回路自体は周知であるの
で、その詳細な説咀は省略する。
When the actuating rod 23 is pulled, the throttle valve 15 does not necessarily need to be rotated to the fully open position (2), but may be rotated to this side. teeth,
The detection means 18 is connected to an electric control circuit (not shown).
When the electrical contacts of the barrel lever switch are switched between conductive and non-conductive in a short period of time, the current is maintained, and when the electrical contacts of the lever switch return to their original state for a certain period of time, the current is turned off. It is now blocked. Incidentally, since the electric control circuit itself is well known, a detailed explanation thereof will be omitted.

なお、アクチュエータ22は前記電磁ソレノイドに限定
されるものではない。
Note that the actuator 22 is not limited to the electromagnetic solenoid described above.

前記構成の本発明に係る刈払機Aによれば、使用者は、
ハンドル8を把持し、スロットル操作レバー13を操作
しつつ草刈等の作業を行う、このとき、スロットル操作
レバー13を操作してもスロットルレバー16は全閉位
置■から中間開度■までしか回動しないので、スロット
ルバルブ15を全開などのように大きく開くことはでき
ず、負荷が比較的軽い普通の作業時には内燃機関1の回
転数が必要以上に高くならない、したがって、騒音及び
燃費が低減される。なお、この普通の作業時には、ハン
ドル8側は本体4側に対して検知手段18が作動する所
定値迄には相対変位しないので、検知手段18たるレバ
ースイッチの電気接点は切り換わらず、アクチュエータ
2またる電磁ソレノイドは通電されず、該アクチュエー
タ22はスロットルレバー16の動作に何ら関与しない
According to the brush cutter A according to the present invention having the above configuration, the user can:
Grasp the handle 8 and operate the throttle operating lever 13 while mowing the grass, etc. At this time, even if the throttle operating lever 13 is operated, the throttle lever 16 only rotates from the fully closed position ■ to the intermediate opening ■. Therefore, the throttle valve 15 cannot be opened wide, such as fully opening, and the rotational speed of the internal combustion engine 1 does not become higher than necessary during ordinary work with a relatively light load. Therefore, noise and fuel consumption are reduced. . Note that during this normal work, the handle 8 side is not displaced relative to the main body 4 side to a predetermined value at which the detection means 18 is activated, so the electric contact of the lever switch serving as the detection means 18 is not switched, and the actuator 2 The other electromagnetic solenoid is not energized, and the actuator 22 does not participate in the operation of the throttle lever 16 at all.

次に1作業中に重負荷がかかると、ハンドル8側が本体
4側に対して相対変位するので、検知手段18たるレバ
ースイッチの触手20がハンドル取付金具9の孔21の
内面に当って電気接点が切り換わり、アクチュエータ2
またる電磁ソレノイドが通電し、スロットルレバー16
がスロットル操作レバー13の操作状態にかかわらずに
全開位置■に回動され、スロットルバルブが全開とされ
る。このように、重負荷がかかったときには自動的にス
ロットルバルブが大きく開かれるので、内燃機関1の回
転数が下がらずに適切な作業を行うことができるととも
に、操作性も向上する。
Next, when a heavy load is applied during one operation, the handle 8 side is displaced relative to the main body 4 side, so the tentacle 20 of the lever switch, which is the detection means 18, hits the inner surface of the hole 21 of the handle mounting bracket 9, causing an electrical contact. is switched, and actuator 2
The electromagnetic solenoid that spans over is energized, and the throttle lever 16
is rotated to the fully open position (3) regardless of the operating state of the throttle operating lever 13, and the throttle valve is fully opened. In this manner, when a heavy load is applied, the throttle valve is automatically opened widely, so that appropriate work can be performed without lowering the rotational speed of the internal combustion engine 1, and operability is also improved.

なお1以上の説明においては、本発明を草刈機に適用し
た例を挙げたが、本発明はへツジトリマーやチェーンソ
ーなどの他の種々の携帯用作業機に適用することができ
るものである。
In one or more of the explanations, an example has been given in which the present invention is applied to a lawn mower, but the present invention can be applied to various other portable working machines such as a hedge trimmer and a chainsaw.

[発明の効果] 本発明によれば、負荷が比較的軽い普通の作業時には内
燃機関の回転数が必要以上に高くならないので、騒音及
び燃費の低減を図ることができる効果が得られるもので
ある。また、重負荷がかかったときには自動的にスロッ
トルバルブが大きく開いて内燃機関の回転数が負荷に負
けて下がることがないので、適切な作業を行うことがで
きるとともに、操作性の向上を図ることができる等の効
果が得られるものである。
[Effects of the Invention] According to the present invention, the rotational speed of the internal combustion engine does not become higher than necessary during ordinary work with a relatively light load, thereby achieving the effect of reducing noise and fuel consumption. . In addition, when a heavy load is applied, the throttle valve automatically opens wide and the internal combustion engine's rotational speed does not drop due to the load, allowing appropriate work to be carried out and improving operability. It is possible to obtain effects such as being able to do the following.

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

図面は本発明の一実施例を示すもので、第1図は草刈機
の斜視全体図、第2図はその要部を示す一部切欠縦断面
図、第3図はスロットルバルブ動作説明図である。 1・・・内燃機関、4・・・本体、7・・・作業部材、
8・・・ハンドル、 12・・・スロットル操作手段、 18・・・検知手 段、 22・・・アクチュエータ。
The drawings show one embodiment of the present invention; Fig. 1 is a perspective overall view of a lawn mower, Fig. 2 is a partially cutaway vertical cross-sectional view showing the main parts thereof, and Fig. 3 is an explanatory diagram of throttle valve operation. be. 1... Internal combustion engine, 4... Main body, 7... Working member,
8... Handle, 12... Throttle operation means, 18... Detection means, 22... Actuator.

Claims (1)

【特許請求の範囲】[Claims] 内燃機関1を原動機とし、重負荷時にハンドル8側が作
業部材7を含む本体4側に対して相対変位する携帯用作
業機において、使用者の操作により前記内燃機関1のス
ロットバルブを所定の中間開度まで開くスロットル操作
手段12と、前記本体4側に対する前記ハンドル8側の
所定値を越える相対変位の有無を検知する検知手段18
と、該検知手段18の検知信号を受けて前記相対変位が
生じたときに前記スロットル操作手段12の操作状態に
かかわらず前記スロットルバルブを前記中間開度よりさ
らに開いた開度に開くアクチュエータ22とを設けたこ
とを特徴とする携帯用作業機。
In a portable working machine that uses an internal combustion engine 1 as the prime mover and whose handle 8 side is displaced relative to the main body 4 side including the working member 7 under heavy load, the slot valve of the internal combustion engine 1 is opened at a predetermined intermediate position by the user's operation. a throttle operating means 12 that opens to the maximum, and a detection means 18 that detects the presence or absence of a relative displacement of the handle 8 side with respect to the main body 4 side that exceeds a predetermined value.
and an actuator 22 that opens the throttle valve to an opening further open than the intermediate opening, regardless of the operating state of the throttle operating means 12 when the relative displacement occurs in response to a detection signal from the detection means 18. A portable work machine characterized by being provided with.
JP1222522A 1989-08-29 1989-08-29 Portable work machine Expired - Lifetime JP2790254B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1222522A JP2790254B2 (en) 1989-08-29 1989-08-29 Portable work machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1222522A JP2790254B2 (en) 1989-08-29 1989-08-29 Portable work machine

Publications (2)

Publication Number Publication Date
JPH0385336A true JPH0385336A (en) 1991-04-10
JP2790254B2 JP2790254B2 (en) 1998-08-27

Family

ID=16783750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1222522A Expired - Lifetime JP2790254B2 (en) 1989-08-29 1989-08-29 Portable work machine

Country Status (1)

Country Link
JP (1) JP2790254B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2751258A1 (en) * 1996-07-22 1998-01-23 Kioritz Corp Manual level for pipeline butterfly valve
EP1094211A1 (en) * 1998-04-28 2001-04-25 Shigeki Sano A working machine throttle lever

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2751258A1 (en) * 1996-07-22 1998-01-23 Kioritz Corp Manual level for pipeline butterfly valve
EP1094211A1 (en) * 1998-04-28 2001-04-25 Shigeki Sano A working machine throttle lever

Also Published As

Publication number Publication date
JP2790254B2 (en) 1998-08-27

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