JP3394963B2 - Impact tool that can control impact force - Google Patents
Impact tool that can control impact forceInfo
- Publication number
- JP3394963B2 JP3394963B2 JP26144692A JP26144692A JP3394963B2 JP 3394963 B2 JP3394963 B2 JP 3394963B2 JP 26144692 A JP26144692 A JP 26144692A JP 26144692 A JP26144692 A JP 26144692A JP 3394963 B2 JP3394963 B2 JP 3394963B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- hardness
- striking
- impact
- speed
- 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 - Fee Related
Links
Landscapes
- Percussive Tools And Related Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は打撃工具に関し、より詳
細には、打撃力を制御することができる打撃工具に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a striking tool, and more particularly to a striking tool capable of controlling a striking force.
【０００２】[0002]
【従来の技術】打撃工具、例えば、さく岩機によるさく
孔においては、さく孔の対象となる岩の岩質によりさく
孔条件が大きく異なってくる。このため、さく岩機の作
動効率やさく孔速度等を最高の状態で使用するために
は、変化するさく孔対象岩の状態、特に、さく孔対象岩
の硬軟を判断し、それに応じて打撃圧、フィード圧等の
さく孔条件を設定することが必要である。2. Description of the Related Art In a punching tool such as an impact tool, for example, a drilling machine, the drilling conditions vary greatly depending on the quality of the rock to be drilled. For this reason, in order to use the drilling machine's operating efficiency and drilling speed at the maximum, determine the changing condition of the drilling target rock, especially the hardness of the drilling target rock, and strike it accordingly. It is necessary to set drilling conditions such as pressure and feed pressure.
【０００３】従来は、岩の硬軟の判断はさく孔速度（単
位時間当たりにさく孔できる距離）を指標として行って
いた。このさく孔速度はオペレータの目視、時計計測、
エンコーダ等を用いた電気的計測等により計測されてい
たが、何れも実際にあるスパンのさく孔を終了した後で
なければ、岩の硬軟を判断することはできなかった。こ
れでは、さく孔が進むにつれて時々刻々変化する岩の硬
度に即応できず、さく岩機の作動効率やさく孔速度の低
下を招く原因となっていた。[0003] Conventionally, the judgment of the hardness of rock has been made by using the drilling speed (distance that can be drilled per unit time) as an index. This drilling speed is measured by the operator's visual inspection, clock measurement,
It was measured by electrical measurement using an encoder, etc., but in both cases, it was not possible to judge the hardness of the rock until after the actual drilling of a certain span was completed. With this, the hardness of the rock, which changes from moment to moment as the drilling progresses, cannot be immediately responded to, which causes a decrease in the operating efficiency of the drilling machine and the drilling speed.
【０００４】さく孔の進行とともに変化するさく孔対象
岩の硬度に応じて、ピストンのストロークを選択可能に
構成した打撃工具が特開平２−２９８４７５号公報に開
示されているが、同公報においても、さく孔対象岩の硬
軟をどのように判定するかについては言及されておら
ず、あるスパンのさく孔が終了しないと岩の硬軟を判定
できないという問題は未解決のままである。A striking tool in which the stroke of the piston can be selected according to the hardness of the rock to be drilled which changes with the progress of drilling is disclosed in Japanese Patent Laid-Open No. 2-298475. However, there is no mention of how to determine the hardness of rocks to be drilled, and the problem that the hardness of rocks cannot be determined until the drilling of a span is completed remains unsolved.
【０００５】[0005]
【発明が解決しようとする課題】本発明はこのような点
に鑑みてなされたものであり、シリンダ内を往復自在に
運動するピストンと、該ピストンにより打撃されてさく
孔を行うチゼルとを有する打撃工具において、ピストン
の各打撃毎に岩の硬軟を判定し、さく孔の進行とともに
変化する岩の硬軟に応じてピストンの打撃力を変えるこ
とによって、作動効率及びさく孔速度を向上させた打撃
工具を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a piston that reciprocates in a cylinder and a chisel that is punched by the piston to punch a hole. In a striking tool, the hardness of rock is judged for each striking of the piston, and the striking force of the piston is changed according to the hardness of the rock that changes with the progress of drilling, thus improving the working efficiency and the drilling speed. The purpose is to provide a tool.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
本発明に係る打撃工具は、各打撃毎にピストンの往復運
動速度を検出する速度検出手段と、該速度検出手段が検
出したピストン速度に基づいて被さく孔物の硬軟を判定
する硬軟判定手段と、該硬軟判定手段の判定結果に基づ
いてピストンの打撃力を制御する制御手段とを備える。To achieve this object, a striking tool according to the present invention has a velocity detecting means for detecting the reciprocating velocity of a piston for each striking and a piston velocity detected by the velocity detecting means. A hard / soft judgment means for judging the hardness of the object to be covered based on the judgment result, and a control means for controlling the striking force of the piston based on the judgment result of the hard / soft judgment means.
【０００７】好ましい実施態様においては、硬軟判定手
段は、打撃前後におけるピストンの速度比から被さく孔
物の硬軟を判定する。In a preferred embodiment, the hardness determination means determines the hardness of the object to be covered from the speed ratio of the piston before and after striking.
【０００８】[0008]
【作用】速度検出手段は各打撃毎のピストンの往復運動
速度を検出し、その検出結果を硬軟判定手段に送信す
る。硬軟判定手段は速度検出手段からの信号に基づいて
ピストンの往復運動速度の速度比を算出する。硬軟判定
手段には、予め実験等によって求められた、ピストンの
往復運動速度比に対する岩質の硬度を表すマップが記憶
されている。硬軟判定手段はこのマップに基づいて、算
出した速度比から岩質の硬度を判定する。次いで、硬軟
判定手段はその判定結果を制御手段に送り、制御手段は
この判定結果に基づいてピストンの打撃力の制御を行
う。The speed detecting means detects the reciprocating speed of the piston for each striking, and sends the detection result to the hard / soft judging means. The hard / soft determination means calculates the speed ratio of the reciprocating speed of the piston based on the signal from the speed detection means. The hard / soft determination means stores a map, which is obtained in advance by an experiment or the like, and represents the hardness of rocks with respect to the reciprocating velocity ratio of the piston. The hardness determination means determines the hardness of rock based on the calculated velocity ratio based on this map. Next, the hardness determination means sends the determination result to the control means, and the control means controls the striking force of the piston based on the determination result.
【０００９】[0009]
【実施例】図１は本発明に係る打撃工具の一実施例の概
略図である。打撃工具１は、シリンダ３と、シリンダ３
内を自在に往復運動するピストン５と、ピストン５によ
り駆動されるチゼル７とを備えている。チゼル７は、大
径部７Ａとロッド部７Ｂとからなり、大径部７Ａはシリ
ンダ３内において自在に往復運動でき、ロッド部７Ｂは
シリンダ３の一端から外部に突出してその先端において
さく孔部７Ｃを形成している。ピストン５はチゼル７の
大径部７Ａとは離れた位置に当初位置しており、油圧に
より駆動されて図１の右方向に運動し、チゼル７の大径
部７Ａに衝突し、チゼル７に右方向へ衝撃力を加える。
この衝撃力により、チゼル７のさく孔部７Ｃが岩９をさ
く孔する。ピストン５はチゼル７の大径部７Ａに衝突し
た後、反力の作用を受けて、図１の左方向に後退する。1 is a schematic view of an embodiment of a striking tool according to the present invention. The impact tool 1 includes a cylinder 3 and a cylinder 3
A piston 5 that freely reciprocates inside and a chisel 7 that is driven by the piston 5 are provided. The chisel 7 includes a large-diameter portion 7A and a rod portion 7B. The large-diameter portion 7A can freely reciprocate in the cylinder 3. The rod portion 7B projects outward from one end of the cylinder 3 and has a drilled portion at its tip. 7C is formed. The piston 5 is initially located at a position apart from the large diameter portion 7A of the chisel 7, and is driven by hydraulic pressure to move in the right direction in FIG. Apply impact force to the right.
Due to this impact force, the drill hole portion 7C of the chisel 7 drills the rock 9. After colliding with the large-diameter portion 7A of the chisel 7, the piston 5 receives a reaction force and retracts to the left in FIG.
【００１０】ピストン５の運動は油圧によって制御され
る。ピストン５とチゼル７との間にはチェンバ１１Ａ
が、ピストン５とシリンダ３の端面３Ａとの間にはチェ
ンバ１１Ｂが各々形成されており、これらのチェンバ１
１Ａ，１１Ｂに油圧が供給されることによって、ピスト
ン５は図１の左方向及び右方向に各々駆動される。チェ
ンバ１１Ａ，１１Ｂへの油圧はポンプ１３により供給さ
れる。すなわち、ポンプ１３がオイルリザーバ１５から
吸い上げたオイルを切換バルブ１７に送り、切換バルブ
１７がチェンバ１１Ａ，１１Ｂに各々通じているオイル
通路１９Ａ，１９Ｂの何れか一方にオイルを送り出すこ
とにより、チェンバ１１Ａまたは１１Ｂの何れかに油圧
が供給される。The movement of the piston 5 is hydraulically controlled. A chamber 11A is provided between the piston 5 and the chisel 7.
However, chambers 11B are formed between the piston 5 and the end surface 3A of the cylinder 3, respectively.
By supplying hydraulic pressure to 1A and 11B, the piston 5 is driven to the left and the right of FIG. 1, respectively. The hydraulic pressure to the chambers 11A and 11B is supplied by the pump 13. That is, the pump 13 sends the oil sucked up from the oil reservoir 15 to the switching valve 17, and the switching valve 17 sends the oil to either one of the oil passages 19A and 19B communicating with the chambers 11A and 11B, respectively. Or hydraulic pressure is supplied to either 11B.
【００１１】シリンダ３にはピストン５の往復運動速度
Ｖ1 ，Ｖ2 を検出する速度検出センサ２１が取り付けら
れている。ここに、速度Ｖ1 はピストン５が図１の右方
向に駆動されてチゼル７の大径部７Ａに衝突する直前の
速度であり、速度Ｖ2 はピストン５がチゼル７の大径部
７Ａに衝突して、図１の左方向に後退する直後の速度で
ある。速度検出センサ２１は検出したピストン５の往復
運動速度Ｖ1 ，Ｖ2 を表す信号を硬軟判定手段兼制御手
段としてのコントローラ２３に送り、コントローラ２３
はこの信号に基づいて速度比Ｖ2 ／Ｖ1 を算出する。A speed detection sensor 21 for detecting the reciprocating speeds V 1 and V 2 of the piston 5 is attached to the cylinder 3. Here, the speed V 1 is the speed immediately before the piston 5 is driven to the right in FIG. 1 and collides with the large diameter portion 7A of the chisel 7, and the speed V 2 is when the piston 5 is applied to the large diameter portion 7A of the chisel 7. This is the speed immediately after the vehicle collides and retreats to the left in FIG. The speed detection sensor 21 sends a signal indicating the detected reciprocating speeds V 1 and V 2 of the piston 5 to a controller 23 as a hard / soft determination means and control means, and the controller 23
Calculates the speed ratio V 2 / V 1 based on this signal.
【００１２】コントローラ２３は速度比Ｖ2 ／Ｖ1 と岩
９の硬度Ｈとの相関関係を示すマップ２５を内蔵してお
り、算出した速度比Ｖ2 ／Ｖ1 に対応する岩の硬度Ｈを
求める。なお、ピストン５の速度比Ｖ2 ／Ｖ1 と岩の硬
度Ｈとの相関関係は予め実験等を行うことにより求めて
おく。コントローラ２３はマップ２５から求めた岩の硬
度Ｈに対応する信号をポンプ１３に送ることによってポ
ンプ１３のオイル吐出量を制御し、岩９の硬度Ｈが大き
くなるにつれて、オイル吐出量が大きくなるようにす
る。The controller 23 has a built-in map 25 showing the correlation between the speed ratio V 2 / V 1 and the hardness H of the rock 9. The controller 23 shows the rock hardness H corresponding to the calculated speed ratio V 2 / V 1. Ask. The correlation between the speed ratio V 2 / V 1 of the piston 5 and the hardness H of rock is determined in advance by conducting experiments or the like. The controller 23 controls the oil discharge amount of the pump 13 by sending a signal corresponding to the hardness H of the rock obtained from the map 25 to the pump 13, so that the oil discharge amount increases as the hardness H of the rock 9 increases. To
【００１３】さらに、コントローラ２３は切換バルブ１
７に切換信号を送り、ピストン５をチゼル７に衝突させ
るときはオイル通路１９Ｂを開き、チゼル７が岩９をさ
く孔した後にピストン５を戻すときにはオイル通路１９
Ａを開くように制御する。Further, the controller 23 uses the switching valve 1
7 to open the oil passage 19B when the piston 5 collides with the chisel 7, and when the piston 5 is returned after the chisel 7 punches the rock 9, the oil passage 19B is opened.
Control A to open.
【００１４】[0014]
【発明の効果】本発明に係る打撃工具においては、従来
のようにあるスパンのさく孔が終了した後に被さく孔物
の硬軟を判定することに代えて、ピストンの各打撃毎に
被さく孔物の硬軟を判定し、その判定結果に応じてピス
トンの打撃力を変える。このため、さく孔の進行ととも
に変化する被さく孔物の硬軟に十分に対応することがで
き、打撃工具の作動効率及びさく孔速度を向上させるこ
とができる。As described above, in the impact tool according to the present invention, instead of determining the hardness of the object to be drilled after the drilling of a span is completed as in the prior art, the hole to be drilled for each impact of the piston. The hardness of the object is judged, and the striking force of the piston is changed according to the judgment result. Therefore, it is possible to sufficiently cope with the hardness and softness of the material to be drilled, which changes with the progress of drilling, and to improve the operating efficiency of the impact tool and the drilling speed.
【図１】本発明に係る打撃工具の一実施例の概略図であ
る。FIG. 1 is a schematic view of an embodiment of a striking tool according to the present invention.
１ 打撃工具 ３ シリンダ ５ ピストン ７ チゼル ９ 岩 １１Ａ，１１Ｂ チェンバ １３ ポンプ １５ オイルリザーバ １７ 切換バルブ ２１ 速度センサ ２３ コントローラ ２５ マップ 1 hammer tool 3 cylinders 5 pistons 7 Chisel 9 rocks 11A, 11B chamber 13 pumps 15 Oil reservoir 17 Switching valve 21 Speed sensor 23 Controller 25 maps
───────────────────────────────────────────────────── フロントページの続き (72)発明者 桧垣 隆 広島県広島市南区仁保二丁目１番26号 マツダアステック株式会社内 (56)参考文献 特開 昭63−185587（ＪＰ，Ａ) 特開 平４−289083（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B25D 9/26 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Higaki 1-226 Niho, Minami-ku, Hiroshima City, Hiroshima Prefecture Mazda Astec Co., Ltd. (56) Reference JP-A-63-185587 (JP, A) JP Flat 4-289083 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) B25D 9/26
Claims (2)
ンと、該ピストンにより打撃されてさく孔を行うチゼル
とを有する打撃工具において、各打撃毎に前記ピストン
の往復運動速度を検出する速度検出手段と、該速度検出
手段が検出したピストン速度に基づいて被さく孔物の硬
軟を判定する硬軟判定手段と、該硬軟判定手段の判定結
果に基づいて前記ピストンの打撃力を制御する制御手段
とを備える打撃工具。1. A striking tool having a piston that reciprocates in a cylinder and a chisel that is punched by the piston to punch a hole. A velocity detecting means that detects the reciprocating velocity of the piston for each striking. And a soft-soft determination means for determining the hardness of the covered hole based on the piston speed detected by the speed detection means, and a control means for controlling the striking force of the piston based on the determination result of the hard-soft determination means. A striking tool to prepare.
ストンの速度比から被さく孔物の硬軟を判定することを
特徴とする請求項１に記載の打撃工具。2. The impact tool according to claim 1, wherein the hardness / softness determining means determines the hardness / hardness of the object to be covered from the speed ratio of the piston before and after the impact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26144692A JP3394963B2 (en) | 1992-09-30 | 1992-09-30 | Impact tool that can control impact force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26144692A JP3394963B2 (en) | 1992-09-30 | 1992-09-30 | Impact tool that can control impact force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06114756A JPH06114756A (en) | 1994-04-26 |
| JP3394963B2 true JP3394963B2 (en) | 2003-04-07 |
Family
ID=17362010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26144692A Expired - Fee Related JP3394963B2 (en) | 1992-09-30 | 1992-09-30 | Impact tool that can control impact force |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3394963B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GR1009101B (en) * | 2016-04-11 | 2017-09-08 | Νεκταριος Μενελαου Βιδακης | Smart tool for percusive carving |
| KR102219023B1 (en) * | 2019-09-24 | 2021-02-23 | 대모 엔지니어링 주식회사 | Fixing structure for sensor of hydraulic breaker |
| KR102219022B1 (en) * | 2019-09-24 | 2021-02-23 | 대모 엔지니어링 주식회사 | Anti-vibration structure for sensor of hydraulic breaker |
-
1992
- 1992-09-30 JP JP26144692A patent/JP3394963B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06114756A (en) | 1994-04-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |