JPH04197125A - Discharge electrode device used in weed-withering method by high voltage discharge - Google Patents
Discharge electrode device used in weed-withering method by high voltage dischargeInfo
- Publication number
- JPH04197125A JPH04197125A JP32771090A JP32771090A JPH04197125A JP H04197125 A JPH04197125 A JP H04197125A JP 32771090 A JP32771090 A JP 32771090A JP 32771090 A JP32771090 A JP 32771090A JP H04197125 A JPH04197125 A JP H04197125A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- discharge electrode
- weeds
- high voltage
- cylindrical body
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 241000196324 Embryophyta Species 0.000 claims abstract description 62
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 6
- 230000010363 phase shift Effects 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- 244000025254 Cannabis sativa Species 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、雑草に近接して配置される放電極と、接地電
極との間に高電圧を印加させて、雑草との間において放
電を生じさせ、これにより雑草を枯死させる方法に使用
される放電極装置に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention applies a high voltage between a discharge electrode placed close to weeds and a ground electrode to generate a discharge between the weeds. This invention relates to a discharge electrode device used in a method for causing weeds to grow and thereby killing weeds.
近時、ゴルフ場において雑草除去のために使用される農
薬により水、或いは空気が汚染されて、環境が悪化され
ると共に、これにより人体に悪影響を及ぼすことが社会
問題となっている。BACKGROUND ART In recent years, agricultural chemicals used to remove weeds at golf courses have contaminated water or air, deteriorating the environment and having a negative impact on the human body, which has become a social problem.
そこで、本発明者は、放電を利用して雑草を電気的に枯
死させて除去する方法を研究し、成功に至っている。こ
の方法は、雑草に近接して配置される放電極と、接地電
極との間に高電圧を印加させて、雑草との間で放電を生
じさせて、その細胞を破壊することにより、枯死に至ら
しめる方法である。Therefore, the present inventor has researched a method of electrically killing and removing weeds using electric discharge, and has succeeded. In this method, a high voltage is applied between a discharge electrode placed close to the weeds and a ground electrode to generate an electric discharge between the weeds and destroy the weeds' cells. This is the way to get there.
放電可能な高電圧の大きさを固定しておき、雑草に対し
て放電極を漸次近づけると、放電が開始される。即ち、
高電圧の大きさが放電可能なものであっても、放電極と
雑草との距離が一定以下でないと、放電は開始されない
ので、ゴルフ場において放電極を芝生面に対して走査さ
せることにより、芝生よりも背丈が高くなっている雑草
のみを° 選択してパルス放電により枯死させることが
可能となる。そこで、例えば板状、或いは多数本の針を
一列に並べた針状の放電極を芝生面に対して走査させる
ことが考えられるが、これでは電極との間の距離が放電
可能にな、っている雑草との間においてのみ放電が生じ
て、他の雑草に対しては放電機会が全くない、従って、
この板状、或いは針状の放電極では、一部の雑草を枯死
させられるのみであるので、実用に供せられない。The magnitude of the high voltage that can be discharged is fixed, and when the discharge electrode is gradually brought closer to the weeds, the discharge is started. That is,
Even if the high voltage is such that it can be discharged, the discharge will not start unless the distance between the discharge electrode and the weeds is below a certain level. It becomes possible to select only weeds that are taller than the lawn and kill them by pulsed discharge. Therefore, it is conceivable to scan the lawn surface with a plate-shaped discharge electrode or a needle-shaped discharge electrode with a large number of needles arranged in a row, but in this case, the distance between the electrode and the discharge electrode becomes large enough to allow discharge. Discharge occurs only between the weeds that are present, and there is no chance of discharging to other weeds.
This plate-shaped or needle-shaped discharge electrode can only wither some weeds and cannot be put to practical use.
〔発明が解決しようとする課題〕
本発明は、ゴルフ場などにおいて放電極を芝生面に対し
て走査させることにより、放電を生じさせて雑草のみを
枯死させるに際して、はぼ全ての雑草に対して放電機会
が生ずるようにして、雑草の除去率を高めることを課題
としている。[Problems to be Solved by the Invention] The present invention aims to kill almost all weeds by scanning a discharge electrode over the lawn surface at a golf course or the like to generate an electric discharge and kill only the weeds. The goal is to increase the weed removal rate by creating electrical discharge opportunities.
この課題を解決するために本発明の採用した手段は、雑
草に近接して配置される放電極と、接地電極との間に高
電圧を印加させて、雑草との間に生ずる放電によりこの
雑草を枯死させる方法に使用される放電極装置において
、絶縁体から成る円筒体の外周面に放電極をらせん状に
して固着して、該円筒体を移動する機体にその軸心をほ
ぼ水平にして装着して駆動回転させることにより、固定
電極から前記放電極に火花放電にて高電圧を供給するよ
うに構成したことである。In order to solve this problem, the means adopted by the present invention is to apply a high voltage between a discharge electrode placed close to the weeds and a ground electrode, and to cause a discharge to occur between the weeds and the weeds. In the discharge electrode device used in the method of killing the dead, the discharge electrode is fixed in a spiral shape to the outer peripheral surface of a cylindrical body made of an insulator, and the axis of the discharge electrode is set almost horizontally to the aircraft moving the cylinder. By attaching the device and driving it to rotate, a high voltage is supplied from the fixed electrode to the discharge electrode in the form of spark discharge.
外周面に放電極がらせん状に固着された絶縁体から成る
円筒体が機体にほぼ水平に装着されて、駆動回転する構
成であるので、この円筒体の回転により放電極における
最も低い部分が、円筒体の一端から他端に向かって順次
移動し、これによりほぼ全ての雑草に放電機会が与えら
れる。雑草が放電極に近づいた時に、固定電極から放電
極に火花放電が発生して高電圧が給電され、雑草に放電
を起こす、この結果、ゴルフ場などにおいて任意に生え
ている雑草のみを選択的に枯死させて除去できる０機体
の移動速度に対して円筒体の回転速度を速くしたり、放
電極を複数条にして円筒体に固着すると、放電機会が与
えられる雑草の割合が一層高くなる。A cylindrical body made of an insulator with a discharge electrode fixed in a spiral shape on its outer circumferential surface is mounted almost horizontally on the fuselage and is driven to rotate.The rotation of this cylindrical body causes the lowest part of the discharge electrode to It moves sequentially from one end of the cylinder to the other, giving almost all the weeds a chance to discharge. When weeds approach the discharge electrode, a spark discharge is generated from the fixed electrode to the discharge electrode, and high voltage is supplied to the weeds, causing a discharge to the weeds.As a result, weeds that are growing randomly on golf courses etc. can be selectively removed. If the rotating speed of the cylindrical body is made faster than the moving speed of the weeds, which can be killed and removed quickly, or if multiple discharge electrodes are fixed to the cylindrical body, the proportion of weeds that are given the opportunity to discharge becomes higher.
以下、実施例を挙げて、本発明を更に詳細に説明する。 Hereinafter, the present invention will be explained in more detail with reference to Examples.
第１図は、本発明に係わる放電極装置を備えた雑草枯死
装置の概略側面図であり、第２図は、放電極体Ｒ１の正
面図、第３図は、同じく正面断面図である。 ・
四つの車輪１を備えた機体２には、エンジンＥと、この
エンジン已により駆動される発電機Ｇと、パルス高電圧
電源ＨＶとが搭載されている。このパルス高電圧電源Ｈ
Ｖは、第４図に示されるように、発電機Ｇから出力され
た電圧■ｏによりセラミックコンデンサＣ０を充電し、
充電された前記コンデンサＣ０と負荷りとをロータリス
パークギャップＲＳにより接続して、パルス高電圧を発
生させるようになっている。FIG. 1 is a schematic side view of a weed killing device equipped with a discharge electrode device according to the present invention, FIG. 2 is a front view of the discharge electrode R1, and FIG. 3 is a front sectional view. - The fuselage 2 equipped with four wheels 1 is equipped with an engine E, a generator G driven by the engine, and a pulse high voltage power supply HV. This pulse high voltage power supply H
As shown in FIG. 4, V charges the ceramic capacitor C0 with the voltage o output from the generator G,
The charged capacitor C0 and the load are connected through a rotary spark gap RS to generate a pulsed high voltage.
また、機体２に取付けられた各車輪１には、それぞれ銅
板を巻付けて接地電極としてあり、機体２の前部には、
本発明に係わる放電極体Ｒ１が装着されている。この放
電極体Ｒ１は、合成樹脂などの絶縁材料から成る円筒体
３の外周面にアルミニウムテープなどのＲ電テープ４を
−ピッチ分だけらせん状にして固着したものである。こ
の導電テープ４は、スリップリング５を介して前記パル
ス高電圧電源ＨＶに接続されている。放電極体Ｒ１は、
適宜の駆動源により駆動回転される。本実施例では、発
電機ＧによりモータＭを回転させ、このモータＭにより
円筒体３を駆動回転させている。In addition, each wheel 1 attached to the fuselage 2 is wrapped with a copper plate as a ground electrode, and the front part of the fuselage 2 is
A discharge electrode body R1 according to the present invention is mounted. This discharge electrode body R1 is made by fixing an R-electrode tape 4 such as an aluminum tape in a spiral shape by a -pitch to the outer peripheral surface of a cylindrical body 3 made of an insulating material such as a synthetic resin. This conductive tape 4 is connected to the pulsed high voltage power supply HV via a slip ring 5. The discharge electrode R1 is
It is driven and rotated by an appropriate driving source. In this embodiment, a motor M is rotated by a generator G, and the cylindrical body 3 is driven and rotated by this motor M.
このため、機体２を直線移動させて芝生面に対して放電
極体Ｒ３を走査させながら、この放電極体Ｒ１を駆動回
転させて、放電極である導電テープ４と、接地電極であ
る車輪１に巻付けた銅板との間にパルス高電圧を印加す
ると、導電テープ４の最下部において雑草６との間でパ
ルス放電が開始され、数回の放電によって雑草６は萎び
て、１ないし数日後に枯死する。ここで、導電テープ４
は、円筒体３の外周面にらせん状にして固着されている
ので、機体２の進行に伴う導電テープ４の最下部の軌跡
は、第６図に示されるようになる。For this reason, while the body 2 is moved linearly and the discharge electrode R3 is scanned over the lawn surface, the discharge electrode R1 is driven and rotated, and the conductive tape 4 which is the discharge electrode and the wheel 1 which is the ground electrode are moved. When a pulsed high voltage is applied between the conductive tape 4 and the copper plate wrapped around it, a pulsed discharge is started between the weeds 6 at the bottom of the conductive tape 4, and the weeds 6 wither due to several discharges and last for one to several days. It dies later. Here, conductive tape 4
is fixed to the outer peripheral surface of the cylindrical body 3 in a spiral shape, so that the locus of the lowest part of the conductive tape 4 as the body 2 advances is as shown in FIG.
従って、雑草６との間の放電は、円筒体３の一端から他
端に向かって順次発生して、これが繰り返されるので、
導電テープ４の全幅Ｗにわたって雑草６との間でパルス
放電が生ずる。Therefore, the electric discharge between the weed 6 and the weed 6 occurs sequentially from one end of the cylindrical body 3 to the other end, and this is repeated.
Pulse discharge occurs across the entire width W of the conductive tape 4 between it and the weeds 6.
この結果、はぼ全ての雑草６に放電機会が与えられて、
芝生７よりも背丈の高い雑草６のみを選択的に枯死させ
て除去できる。また、第５図に示される放電極体Ｒ２は
、円筒体３の外周面に位相をずらして二条の導電テープ
１４ａ、１４ｂをらせん状にして固着したものである。As a result, almost all the weeds 6 are given the opportunity to discharge,
Only the weeds 6 that are taller than the lawn 7 can be selectively killed and removed. Further, the discharge electrode body R2 shown in FIG. 5 is made by fixing two conductive tapes 14a and 14b in a spiral shape with a phase difference to the outer peripheral surface of the cylindrical body 3.
この放電極体Ｒｇを使用すると、機体２の進行に伴う各
導電テープ１４ａ、１４ｂの軌跡は、第７図に示される
ようになって、放電機会が与えられる雑草の割合が更に
高くなる。When this discharge electrode body Rg is used, the trajectory of each of the conductive tapes 14a and 14b as the machine body 2 advances will become as shown in FIG. 7, and the proportion of weeds to which discharge opportunities are given will further increase.
また、雑草の除去作業中において、雑草が導電テープ４
に直接に接触すると、パルス放電は行われない、そこで
、第８図及び第９図に示される放電極体Ｒ１のように、
円筒体３の外周面にらせん状の溝８を形成して、この溝
８の底面に導電テープ４を固着すると、円筒体３の外周
面に雑草が接触しても、この雑草が溝８内に入り込んで
いる導電テープ４に接触しない限りパルス放電が行われ
るので、この手段によっても放電機会が与えられる雑草
の割合を高めることができる。更に、機体２の進行速度
に対する放電極体Ｒ３〜Ｒ５の回転速度を高めると、雑
草の除去率が高くなる。なお、第１図、第６図、及び第
７図において、Ｐは、機体２の進行方向を示す。Also, during weed removal work, weeds may be removed from the conductive tape 4.
If the discharge electrode R1 is in direct contact with the discharge electrode R1 shown in FIGS. 8 and 9, no pulse discharge will occur.
If a spiral groove 8 is formed on the outer peripheral surface of the cylindrical body 3 and the conductive tape 4 is fixed to the bottom of this groove 8, even if weeds come into contact with the outer peripheral surface of the cylindrical body 3, the weeds will not be inside the groove 8. Since pulse discharge is performed as long as the weed does not come into contact with the conductive tape 4 that has entered the weed, it is possible to increase the proportion of weeds that are given the opportunity to discharge by this means. Furthermore, if the rotational speed of the discharge electrode bodies R3 to R5 is increased relative to the traveling speed of the machine body 2, the weed removal rate will be increased. In addition, in FIG. 1, FIG. 6, and FIG. 7, P indicates the advancing direction of the aircraft 2.
また、上記実施例では、高電圧電源としてパルス高電圧
が発生されるものを示したが、放電極と雑草との間で火
花放電が生ずるものであれば、高電圧電源は上記のもの
に限定されない。In addition, in the above embodiment, a high voltage power supply that generates a pulsed high voltage is shown, but the high voltage power supply is limited to the above as long as spark discharge occurs between the discharge electrode and the weeds. Not done.
このように、本発明に係わる放電極装置は、外周面に放
電極がらせん状に固着された絶縁体から成る円筒体を機
体にほぼ水平に装着して、駆動回転させることにより、
固定電極から前記放電極に火花放電にて高電圧を供給す
る構成であるので、円筒体の回転により放電極の最も低
い部分が円筒体の一端から他端に向かって順次移動する
ため、放電極の幅内においてほぼ全ての雑草に放電機会
が与えられる。このため、ゴルフ場などにおいて芝生内
に混在して任意に生えている雑草の除去率が高まる。As described above, the discharge electrode device according to the present invention has a cylindrical body made of an insulator on which a discharge electrode is fixed in a spiral shape on the outer circumferential surface of the body, and is mounted almost horizontally on the fuselage body and driven to rotate.
Since the configuration is such that a high voltage is supplied from the fixed electrode to the discharge electrode by spark discharge, the lowest part of the discharge electrode sequentially moves from one end of the cylinder toward the other due to the rotation of the cylinder. Almost all weeds are given the opportunity to discharge within the width of the field. Therefore, the removal rate of weeds that grow arbitrarily in the lawn at golf courses and the like is increased.
また、円筒体の外周面にらせん状の溝を形成して、この
溝底に放電極を固着すると、雑草が円筒体の外周面に接
触しても放電極と接触しない限り放電が行われるので、
円筒体に接触するような特別に背丈の高い雑草を枯死さ
せることができて、雑草の除去率が一層高まる。Furthermore, if a spiral groove is formed on the outer circumferential surface of the cylindrical body and a discharge electrode is fixed to the bottom of this groove, even if weeds come into contact with the outer circumferential surface of the cylindrical body, discharge will occur as long as the weeds do not come into contact with the discharge electrode. ,
It is possible to kill particularly tall weeds that come into contact with the cylindrical body, further increasing the weed removal rate.
第１図は、本発明に係わる放電極装置を備えた雑草枯死
装置の概略側面図、第２図は、放電極体Ｒ１の正面図、
第３図は、同じく正面断面図、第４図は、パルス高電圧
電源ＨＶの回路図、第５図は、円筒体３の外周面に二条
の導電テープ１４ａ。
１４ｂを固着した放電極体Ｒ０の正面図、第６図及び第
７図は、それぞれ雑草の除去作業中における放電極体Ｒ
１，Ｒ１を構成している導電テープ４゜１４ａ、１４ｂ
の最下部の軌跡を示す図、第８図は、放電極体Ｒ３の横
断面図、第９図は、第８図における溝８の部分の拡大図
である。
本発明を構成している主要部分の符号の説明は以下の通
りである。
Ｈｖ：パルス高電圧電源
Ｒｔ、Ｒｔ、Ｒｓ ：放電極体 ２：機体３：円
筒体
４．１４ａ、１４ｂ ：導電テープ（放電極）６：雑草
７：芝生
８：円筒体の外周面に形成されたらせん状の溝特許出願
人 株式会社 共 栄 社
水野 彰FIG. 1 is a schematic side view of a weed killing device equipped with a discharge electrode device according to the present invention, FIG. 2 is a front view of a discharge electrode R1,
3 is a front sectional view, FIG. 4 is a circuit diagram of the pulsed high voltage power supply HV, and FIG. 5 shows two strips of conductive tape 14a on the outer peripheral surface of the cylindrical body 3. A front view of the discharge electrode R0 to which the discharge electrode 14b is fixed, FIGS. 6 and 7 show the discharge electrode R0 during weed removal work, respectively.
1, Conductive tape 4゜14a, 14b constituting R1
FIG. 8 is a cross-sectional view of the discharge electrode R3, and FIG. 9 is an enlarged view of the groove 8 in FIG. 8. The explanations of the symbols of the main parts constituting the present invention are as follows. Hv: Pulse high voltage power supply Rt, Rt, Rs: Discharge electrode body 2: Aircraft body 3: Cylindrical body 4.14a, 14b: Conductive tape (discharge electrode) 6: Weeds 7: Grass 8: Formed on the outer peripheral surface of the cylinder body Spiral groove patent applicant Akira Mizuno, Kyoei Co., Ltd.
Claims (3)
の間に高電圧を印加させて、雑草との間に生ずる放電に
よりこの雑草を枯死させる方法に使用される放電極装置
であって、絶縁体から成る円筒体の外周面に放電極をら
せん状にして固着して、該円筒体を移動する機体にその
軸心をほぼ水平にして装着して駆動回転させることによ
り、固定電極から前記放電極に火花放電にて高電圧を供
給するように構成したことを特徴とする高電圧放電によ
る雑草枯死方法に使用される放電極装置。(1) A discharge electrode device used in a method in which a high voltage is applied between a discharge electrode placed close to weeds and a ground electrode, and the discharge generated between the weeds kills the weeds. A discharge electrode is fixed in a spiral shape to the outer circumferential surface of a cylindrical body made of an insulator, and the cylindrical body is mounted on a moving aircraft with its axis approximately horizontal and driven to rotate. A discharge electrode device used in a method for killing weeds by high voltage discharge, characterized in that the discharge electrode device is configured to supply high voltage from an electrode to the discharge electrode by spark discharge.
を位相をずらして同一方向にらせん状にして固着したこ
とを特徴とする請求項１に記載の高電圧放電による雑草
枯死方法に使用される放電極装置。(2) The method for killing weeds by high-voltage discharge according to claim 1, characterized in that a plurality of discharge electrodes are fixed to the outer peripheral surface of a cylindrical body made of an insulator in a spiral shape with a phase shift and in the same direction. Discharge electrode device used for.
形成して、この溝底に放電極を固着したことを特徴とす
る請求項１又は２に記載の高電圧放電による雑草枯死方
法に使用される放電極装置。(3) Weed dying by high-voltage discharge according to claim 1 or 2, characterized in that a spiral groove is formed on the outer peripheral surface of the cylindrical body made of an insulator, and a discharge electrode is fixed to the bottom of the groove. Discharge electrode device used in the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32771090A JPH074133B2 (en) | 1990-11-27 | 1990-11-27 | Discharge electrode device used for weed death method by high voltage discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32771090A JPH074133B2 (en) | 1990-11-27 | 1990-11-27 | Discharge electrode device used for weed death method by high voltage discharge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04197125A true JPH04197125A (en) | 1992-07-16 |
| JPH074133B2 JPH074133B2 (en) | 1995-01-25 |
Family
ID=18202124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32771090A Expired - Fee Related JPH074133B2 (en) | 1990-11-27 | 1990-11-27 | Discharge electrode device used for weed death method by high voltage discharge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074133B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0556739A (en) * | 1991-09-03 | 1993-03-09 | Ishikawajima Shibaura Mach Co Ltd | Weeding and sterilizing device |
| JP2013099320A (en) * | 2011-10-12 | 2013-05-23 | Yushin Koki Kk | Electric shock device |
| EP3415004A1 (en) | 2017-06-14 | 2018-12-19 | Birchmeier Sprühtechnik AG | Weed control |
| JP2020080732A (en) * | 2018-11-26 | 2020-06-04 | 株式会社クボタ | Weeding machine |
| JP2020080729A (en) * | 2018-11-26 | 2020-06-04 | 株式会社クボタ | Weeding machine |
| JP2020080728A (en) * | 2018-11-26 | 2020-06-04 | 株式会社クボタ | Weeding machine |
-
1990
- 1990-11-27 JP JP32771090A patent/JPH074133B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0556739A (en) * | 1991-09-03 | 1993-03-09 | Ishikawajima Shibaura Mach Co Ltd | Weeding and sterilizing device |
| JP2013099320A (en) * | 2011-10-12 | 2013-05-23 | Yushin Koki Kk | Electric shock device |
| EP3415004A1 (en) | 2017-06-14 | 2018-12-19 | Birchmeier Sprühtechnik AG | Weed control |
| WO2018229198A1 (en) | 2017-06-14 | 2018-12-20 | Birchmeier Sprühtechnik AG | Weed control |
| JP2020080732A (en) * | 2018-11-26 | 2020-06-04 | 株式会社クボタ | Weeding machine |
| JP2020080729A (en) * | 2018-11-26 | 2020-06-04 | 株式会社クボタ | Weeding machine |
| JP2020080728A (en) * | 2018-11-26 | 2020-06-04 | 株式会社クボタ | Weeding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH074133B2 (en) | 1995-01-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |