WO2022215148A1 - Root cutter attachable to trimmer, and trimmer provided with same - Google Patents

Root cutter attachable to trimmer, and trimmer provided with same Download PDF

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Publication number
WO2022215148A1
WO2022215148A1 PCT/JP2021/014572 JP2021014572W WO2022215148A1 WO 2022215148 A1 WO2022215148 A1 WO 2022215148A1 JP 2021014572 W JP2021014572 W JP 2021014572W WO 2022215148 A1 WO2022215148 A1 WO 2022215148A1
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Prior art keywords
root cutting
blade
plate
root
cutter
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PCT/JP2021/014572
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French (fr)
Japanese (ja)
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正志 樽見
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有限会社とまと不動産
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Priority to PCT/JP2021/014572 priority Critical patent/WO2022215148A1/en
Publication of WO2022215148A1 publication Critical patent/WO2022215148A1/en

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B39/00—Other machines specially adapted for working soil on which crops are growing
    • A01B39/12—Other machines specially adapted for working soil on which crops are growing for special purposes, e.g. for special culture
    • A01B39/18—Other machines specially adapted for working soil on which crops are growing for special purposes, e.g. for special culture for weeding
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/835—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes
    • A01D34/90—Mowers; Mowing apparatus of harvesters specially adapted for particular purposes for carrying by the operator

Definitions

  • the present invention relates to a root cutting cutter that can be attached to a brush cutter and a brush cutter including the same.
  • brush cutters also called lawn mowers
  • a motor a shaft
  • a rotary blade such as a rotary saw
  • grasses and trees with small diameters can be cut efficiently.
  • a brush cutter is also known in which a resin cord such as a thick nylon cord is attached to the rotor portion of the brush cutter to which the rotary saw is attached.
  • Such brush cutters are often purchased by non-farmer households, for example, to cut weeds in the garden.
  • Such brush cutters can cut grass and trees with small diameters on the ground surface, but cannot cut weeds from the roots.
  • Patent Document 1 discloses a rotary blade for a lawn mower in which the cutting blade is directed toward the ground. By directing the cutting blade toward the ground, the cutting blade can be inserted into the soil, so that the grass can be cut from the roots.
  • a blade is also provided at the tip portion in the outer diameter direction of the rotary blade, and normal mowing work can also be performed. That is, since the blade is provided at the tip portion of the rotary blade in the outer diameter direction, it is possible to mow the grass that is in contact with the rotating rotary blade from the outer diameter direction.
  • a specialized mower for ridges has a head with a plurality of blades projecting radially from a horizontally extending rotating shaft. By moving the head back and forth along the ground while the rotating shaft is parallel to the ground, the rotating shaft rotates while a plurality of blades projecting radially from the rotating shaft alternately pierce the ground. . In this way, the dedicated mower for ridges can mow weeds and their roots by alternately sticking the blades into the ground as if plowing the ground.
  • An object of the present invention is to provide a root cutting cutter that can be attached to a brush cutter and a brush cutter equipped with the same.
  • a root cutting cutter attached to a brush cutter, a circular plate-shaped portion having no blade formed on the outer peripheral portion;
  • a root cutting cutter is provided, comprising at least one root cutting blade disposed on the lower surface of the plate-like portion and protruding downward from the lower surface of the plate-like portion.
  • the root-cutting cutter of the present invention is provided with a root-cutting blade that protrudes downward from the lower surface of the plate-like portion, so that the roots of weeds can be cut by easily digging up the soil in the field. Further, since no blade is formed on the outer peripheral portion of the plate-like portion, even if the crops hit the outer peripheral portion of the rotating plate-like portion, there is no fear of damaging the crops.
  • FIG. 1 is a schematic diagram of a bush cutter 10 according to this embodiment.
  • 2(a) is a plan view of the rotating blade 70
  • FIG. 2(b) is a side view of the rotating blade 70.
  • FIG. 1 is a schematic diagram of a bush cutter 10 according to this embodiment.
  • 2(a) is a plan view of the rotating blade 70
  • FIG. 2(b) is a side view of the rotating blade 70.
  • FIG. 1 is a schematic diagram of a bush cutter 10 according to this embodiment.
  • 2(a) is a plan view of the rotating blade 70
  • FIG. 2(b) is a side view of the rotating blade 70.
  • a bush cutter 10 equipped with a rotating blade 70 (an example of a root cutting cutter) according to an embodiment of the present invention will be described with reference to the drawings.
  • a rotating blade 70 an example of a root cutting cutter
  • the brush cutter 10 includes a cylindrical rod 20, a rotor portion 30 provided at one end of the rod 20, and a drive shaft provided at the end of the rod 20 opposite to the rotor portion 30. a portion 40, a handle 50 provided on the side of the rod 20 closer to the driving portion 20, a guard 60 provided on the side of the rod 20 closer to the rotor portion 30, and a rotating blade 70 fixed to the rotor portion 30.
  • the cylindrical rod 20 is a hollow metal pipe with a length of about 1500mm to 1700mm, and the driving part 40 is attached to its upper end.
  • the drive unit 40 includes a motor 41 and a battery 42 for supplying power to the motor 41 .
  • Rotation of the rotating shaft 43 of the motor 41 is transmitted to the rotor portion 30 through a transmission mechanism (not shown) provided inside the rod 20 .
  • the rotor portion 30 includes a shaft that is configured to rotate by rotational driving force transmitted from the rotating shaft 43 of the motor 41 through the transmission mechanism.
  • the handle 50 is a handle for the user to grip the brush cutter 10, and has a substantially U shape.
  • a switch 51 interlocking with a motor 41 is attached to one end of the handle 50 , and while the switch 51 is turned on by the user, the motor 41 drives and the rotor section 30 rotates.
  • the shaft of the rotor section 30 is threaded in a male thread shape, and the rotating blades 70 inserted through the shaft are fixed to the shaft with a fastening member such as a nut.
  • the rotary blade 70 is a circular plate-like metal member, and has no edge on its outer circumference.
  • An insertion hole 78 for inserting the shaft of the rotor portion 30 is formed in the center of the rotating blade 70 .
  • the rotating blade 70 is formed with six root cutting blades 71 to 76 .
  • six root-cutting blades 71-79 three root-cutting blades 71-73 are arranged in the radial direction of the rotating blade 70 from the insertion hole 72 of the rotating blade 70 toward the outer periphery.
  • the other three root cutting blades 74 to 76 are also arranged in the radial direction of the rotating blade 70 from the insertion hole 72 of the rotating blade 70 toward the outer circumference.
  • the three root-cutting blades 71 to 73 and the three root-cutting blades 74 to 76 are arranged in a straight line so as to face each other with the insertion hole 72 interposed therebetween.
  • the six root cutting blades 71 to 76 are all V-shaped (triangular) blades projecting downward from the lower surface of the rotating blade 70 .
  • the root cutting blades 71 to 76 are formed by press working the rotating blade 70 .
  • the six root-cutting blades 71 to 76 are formed by making a V-shaped cut (slitting) at a predetermined position of the rotary blade 70 and pressing the cut portion downward to bend it. formed.
  • the rotary blade 70 is provided with the root cutting blades 71 to 76 protruding downward from the lower surface of the rotary blade 70, so that the soil in the field can be easily dug up. , can cut the roots of weeds.
  • no edge is formed on the outer peripheral portion of the rotating blade 70, even if the crop hits the rotating outer peripheral portion of the rotating blade 70, there is no danger of damaging the crop.
  • none of the root cutting blades 71 to 76 protrude from the outer periphery of the rotating blade 70 when the rotating blade 70 is viewed from above.
  • all the root cutting blades 71 to 76 are formed so as to vertically overlap the rotating blade 70 . Since the root-cutting blades 71-76 do not protrude from the outer peripheral portion of the rotating blade 70 in this way, there is no fear that the root-cutting blades 71-76 will hit the crop and damage the crop.
  • the root cutting blades 71 to 76 are integrally formed with the rotating blade 70 by pressing the rotating blade 70 . Therefore, the number of parts can be reduced compared to the case where the blade for root cutting is formed by a part separate from the rotating blade, and the weight and cost can be reduced.
  • the rotary blade 70 is provided with six root-cutting blades 71 to 76, but the number of root-cutting blades can be set arbitrarily.
  • the three root cutting blades 71 to 73 aligned in the radial direction of the rotary blade 70 and the three root cutting blades 74 to 76 aligned in the radial direction of the rotary blade 70 are separated from each other by 180. It was arranged to form an angle of degree.
  • the arrangement of the root-cutting blades is not limited to such an arrangement, and may be arbitrary. For example, four rows of root-cutting blades arranged in the radial direction of the rotating blade 70 may be provided, and the rows of root-cutting blades may be arranged so as to form an angle of 90 degrees with each other. Alternatively, a plurality of root cutting blades may be randomly arranged on the rotating blade 70 .
  • the root cutting blades 71 to 76 are V-shaped (triangular) blades formed by pressing the rotating blade 70 .
  • the root cutting blade may have any shape as long as it protrudes downward from the lower surface of the rotating blade 70 .
  • the root cutting blades 71 to 76 are integrally formed from the rotating blade 70 made of metal by pressing the rotating blade 70 .
  • the present invention is not necessarily limited to such an aspect.
  • the root cutting blade may be formed on the lower surface of the rotary blade by screwing, welding, or the like.
  • the material of the rotary blade and the root cutting blade does not necessarily have to be metal, and any suitable material can be used.
  • the number of parts can be reduced, and the manufacturing cost can be made cheaper.
  • the height of the root cutting blades 71 to 76 (length in the vertical direction from the rotating blade 70 to the tips of the root cutting blades 71 to 76) can be set to an appropriate length. Therefore, it is possible to prepare a plurality of rotating blades 70 having root cutting blades 71 to 76 with different heights, and replace the rotating blades 70 depending on the application.
  • the bush cutter 10 is equipped with the battery 42 and driven by electric power, but may be driven by an engine, for example.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

Provided is a trimmer capable of easily digging up field soil and cutting and removing weed roots. A rotary blade 70 comprises root cutting blades 71 to 76 protruding downward from the lower surface of the rotary blade 70. Further, no blades are formed on the outer peripheral portion of the rotary blade 70.

Description

刈払機に取り付け可能な根刈り用カッター及びそれを備える刈払機Root cutting cutter attachable to brush cutter and brush cutter provided with the same
　本発明は、刈払機に取り付け可能な根刈り用カッター及びそれを備える刈払機に関する。 The present invention relates to a root cutting cutter that can be attached to a brush cutter and a brush cutter including the same.
　従来、原動機、シャフト、回転鋸などの回転刃を有し、ユーザがシャフトに固定されたハンドルを操作して草や小径木を刈払うための刈払機（草刈機ともいう）が知られている。チップソーなどの金属刃の回転鋸を用いた場合には、草や小径木を効率よく刈り払うことができる。また、刈払機の回転鋸が取り付けられているロータ部分に、太めのナイロンコードのような樹脂製のコードを取り付けられた刈払機も知られている。このような刈払機は、農家ではない一般の家庭においても、例えば庭の雑草を刈るために購入することが多い。但し、このような刈払機は、地表に伸びている草や小径木を刈ることはできるが、雑草を根から刈り取ることはできない。 2. Description of the Related Art Conventionally, brush cutters (also called lawn mowers) have been known which have a motor, a shaft, and a rotary blade such as a rotary saw, and which are used by a user to operate a handle fixed to the shaft to cut grass and small-diameter trees. . When a rotating saw with a metal blade such as a chip saw is used, grasses and trees with small diameters can be cut efficiently. A brush cutter is also known in which a resin cord such as a thick nylon cord is attached to the rotor portion of the brush cutter to which the rotary saw is attached. Such brush cutters are often purchased by non-farmer households, for example, to cut weeds in the garden. However, such brush cutters can cut grass and trees with small diameters on the ground surface, but cannot cut weeds from the roots.
　特許文献１には、刈刃を地面方向に向けた草刈機用回転刃が開示されている。刈刃を地面方向に向けることによって、刈刃を土の中まで入れることができるので、草を根から刈り取ることができる。 Patent Document 1 discloses a rotary blade for a lawn mower in which the cutting blade is directed toward the ground. By directing the cutting blade toward the ground, the cutting blade can be inserted into the soil, so that the grass can be cut from the roots.
特開２００９－２９７０１５号公報JP 2009-297015 A
　特許文献１に記載の草刈機用回転刃においては、回転刃の外径方向の先端部分にも刃が設けられており、通常の草刈り作業も行うことができる。つまり、回転刃の外径方向の先端部分に刃が設けられているので、回転する回転刃に外径方向から触れた草を刈り取ることができる。 In the rotary blade for a lawn mower described in Patent Document 1, a blade is also provided at the tip portion in the outer diameter direction of the rotary blade, and normal mowing work can also be performed. That is, since the blade is provided at the tip portion of the rotary blade in the outer diameter direction, it is possible to mow the grass that is in contact with the rotating rotary blade from the outer diameter direction.
　野菜等の作物が植えられている畑において、畝の間に生えてくる雑草を刈り取る作業を行う必要がある。しかしながら、市販の刈払機を用いて雑草を刈る場合には、刃又はコードが作物に当たって作物を傷つける恐れがある。また、畑は養分が豊富であり、雑草がすぐに伸びるため、雑草を根から刈り取ることが望まれている。しかしながら、上述のように、市販の刈払機では雑草を根から刈り取ることができない。仮に、特許文献１に記載の草刈機用回転刃を用いたとしても、上述のように、回転刃の外径方向の先端部分に刃が設けられているので、刃が作物に当たって作物を傷つける恐れがある。 In fields where crops such as vegetables are planted, it is necessary to cut weeds that grow between the ridges. However, when weeds are cut using a commercially available brush cutter, the blade or cord may strike and damage the crop. In addition, since the field is rich in nutrients and weeds grow quickly, it is desired to cut the weeds from the roots. However, as described above, commercially available brush cutters cannot cut weeds from the roots. Even if the rotary blade for a lawn mower described in Patent Document 1 is used, as described above, since the blade is provided at the tip portion in the outer diameter direction of the rotary blade, there is a risk that the blade will hit the crop and damage the crop. There is
　畑の雑草取りを行う場合には市販の刈払機は用いられず、手作業で雑草を抜く、農薬を用いる、あるいは、畝用の専用草刈り機を用いるなどの手法がとられてきた。畝用の専用草刈り機は、例えば、水平に延びる回転シャフトから径方向に向かって突出する複数の刃（ブレード）を備えたヘッドを有している。回転シャフトが地面に平行になる状態で、ヘッドを地面に沿って前後に移動させることにより、回転シャフトから径方向に向かって突出する複数のブレードが交互に地面に突き刺さりながら、回転シャフトが回転する。このように、畝用の専用草刈り機は、複数のブレードが地面を耕すように交互に地面に突き刺さることで、雑草及びその根を刈り取ることができる。 Commercially available brush cutters were not used when weeding fields, and methods such as manually removing weeds, using pesticides, or using dedicated mowers for ridges were used. A specialized mower for ridges, for example, has a head with a plurality of blades projecting radially from a horizontally extending rotating shaft. By moving the head back and forth along the ground while the rotating shaft is parallel to the ground, the rotating shaft rotates while a plurality of blades projecting radially from the rotating shaft alternately pierce the ground. . In this way, the dedicated mower for ridges can mow weeds and their roots by alternately sticking the blades into the ground as if plowing the ground.
　近年、農家でない人が、自宅の敷地や市民農園などを利用して作物を育てることが行われている。しかしながら、農家でない人がこのような畝用の専用草刈り機を購入することはコストの面で問題がある。また、手作業で雑草を抜くのは労力が大きく、農薬を用いることは安全面での不安がある。 In recent years, non-farmers have been using their home premises and allotment gardens to grow crops. However, it is costly for a non-farmer to purchase such a dedicated mower for ridges. In addition, pulling out weeds manually is labor intensive, and using pesticides raises concerns about safety.
　本発明の目的は、刈払機に取り付けることができる根切り用カッターと、それを備える刈払機を提供することである。 An object of the present invention is to provide a root cutting cutter that can be attached to a brush cutter and a brush cutter equipped with the same.
　本発明の態様に従えば、
　刈払機に取り付けられる根切り用カッターであって、
　外周部分に刃が形成されていない円形の板状部と、
　前記板状部の下面に配置されて、前記板状部の下面から下方に突出する、少なくとも１つの根切りブレードを有することを特徴とする根切り用カッターが提供される。 According to an aspect of the invention,
A root cutting cutter attached to a brush cutter,
a circular plate-shaped portion having no blade formed on the outer peripheral portion;
A root cutting cutter is provided, comprising at least one root cutting blade disposed on the lower surface of the plate-like portion and protruding downward from the lower surface of the plate-like portion.
　本発明の根切り用カッターにおいては、板状部の下面から下方に突出する根切り用ブレードが設けられているので、容易に畑の土を掘り起こすようにして、雑草の根を刈り取ることができる。また、板状部の外周部分には刃が形成されていないので、仮に、回転する板状部の外周部分に作物が当たったとしても、作物を傷つける恐れがない。 The root-cutting cutter of the present invention is provided with a root-cutting blade that protrudes downward from the lower surface of the plate-like portion, so that the roots of weeds can be cut by easily digging up the soil in the field. Further, since no blade is formed on the outer peripheral portion of the plate-like portion, even if the crops hit the outer peripheral portion of the rotating plate-like portion, there is no fear of damaging the crops.
図１は本実施形態に係る刈払機１０の概略図である。FIG. 1 is a schematic diagram of a bush cutter 10 according to this embodiment. 図２（ａ）は回転ブレード７０の平面図であり、図２（ｂ）は、回転ブレード７０の側面図である。2(a) is a plan view of the rotating blade 70, and FIG. 2(b) is a side view of the rotating blade 70. FIG.
　本発明の実施形態に係る回転ブレード７０（根切り用カッターの一例）を備える刈払機１０について、図面を参照しつつ説明する。なお、以下の説明においては、図１に示されるように、上側、下側、左側、右側をそれぞれ定義することとする。 A bush cutter 10 equipped with a rotating blade 70 (an example of a root cutting cutter) according to an embodiment of the present invention will be described with reference to the drawings. In the following description, as shown in FIG. 1, upper side, lower side, left side, and right side are defined respectively.
　図１に示されるように、刈払機１０は、円柱状のロッド２０と、ロッド２０の一端に設けられたロータ部３０と、ロッド２０のロータ部３０と反対側の端部に設けられた駆動部４０と、ロッド２０の駆動部２０に近い側に設けられたハンドル５０と、ロッド２０のロータ部３０に近い側に設けられたガード６０と、ロータ部３０に固定された回転ブレード７０とを主に備える。 As shown in FIG. 1, the brush cutter 10 includes a cylindrical rod 20, a rotor portion 30 provided at one end of the rod 20, and a drive shaft provided at the end of the rod 20 opposite to the rotor portion 30. a portion 40, a handle 50 provided on the side of the rod 20 closer to the driving portion 20, a guard 60 provided on the side of the rod 20 closer to the rotor portion 30, and a rotating blade 70 fixed to the rotor portion 30. Prepare the Lord.
　円柱状のロッド２０は、長さ約１５００ｍｍ～１７００ｍｍ程度の中空の金属製パイプであり、その上端に駆動部４０が取り付けられている。駆動部４０は、モータ４１と、モータ４１に電力を供給するためのバッテリ４２とを備えている。モータ４１の回転軸４３の回転は、ロッド２０の内部に設けられた不図示の伝達機構を通じてロータ部３０に伝達される。ロータ部３０は、伝達機構を通じてモータ４１の回転軸４３から伝達された回転駆動力によって回転するように構成されたシャフトを備える。 The cylindrical rod 20 is a hollow metal pipe with a length of about 1500mm to 1700mm, and the driving part 40 is attached to its upper end. The drive unit 40 includes a motor 41 and a battery 42 for supplying power to the motor 41 . Rotation of the rotating shaft 43 of the motor 41 is transmitted to the rotor portion 30 through a transmission mechanism (not shown) provided inside the rod 20 . The rotor portion 30 includes a shaft that is configured to rotate by rotational driving force transmitted from the rotating shaft 43 of the motor 41 through the transmission mechanism.
　ハンドル５０は、ユーザが刈払機１０を把持するための取手であり、略Ｕ字形状を有する。ハンドル５０の一端には、モータ４１に連動するスイッチ５１が取り付けられており、ユーザがスイッチ５１をオンにしている間、モータ４１が駆動してロータ部３０が回転する。 The handle 50 is a handle for the user to grip the brush cutter 10, and has a substantially U shape. A switch 51 interlocking with a motor 41 is attached to one end of the handle 50 , and while the switch 51 is turned on by the user, the motor 41 drives and the rotor section 30 rotates.
　ロータ部３０のシャフトには雄ねじ状にネジが切られており、シャフトに挿通された回転ブレード７０は、ナット等の締結部材によってシャフトに固定される。 The shaft of the rotor section 30 is threaded in a male thread shape, and the rotating blades 70 inserted through the shaft are fixed to the shaft with a fastening member such as a nut.
　図２（ａ）、（ｂ）に示されるように、回転ブレード７０は、円形の板状の金属部材であり、その外周には刃が設けられていない。回転ブレード７０の中央には、ロータ部３０のシャフトに挿通するための挿通孔７８が形成されている。 As shown in FIGS. 2(a) and 2(b), the rotary blade 70 is a circular plate-like metal member, and has no edge on its outer circumference. An insertion hole 78 for inserting the shaft of the rotor portion 30 is formed in the center of the rotating blade 70 .
　回転ブレード７０には、６つの根切り用ブレード７１～７６が形成されている。６つの根切り用ブレード７１～７９のうち、３つの根切り用ブレード７１～７３は、回転ブレード７０の挿通孔７２から外周に向かって、回転ブレード７０の半径方向に並んでいる。同様に、他の３つの根切り用ブレード７４～７６も、回転ブレード７０の挿通孔７２から外周に向かって回転ブレード７０の半径方向に並んでいる。３つの根切り用ブレード７１～７３と３つの根切り用ブレード７４～７６とは、挿通孔７２を挟んで互いに向かい合うように一直線上に並んでいる。６つの根切り用ブレード７１～７６は、いずれも、回転ブレード７０の下面から下方に突出するＶ字状（三角形状）のブレードである。根切り用ブレード７１～７６は、回転ブレード７０にプレス加工を行うことにより形成されている。具体的には、６つの根切り用ブレード７１～７６は、回転ブレード７０の所定の位置にＶ字状の切り込みを入れ（スリット加工）、切り込みを入れた部分を下方にプレスして折り曲げることにより形成されている。 The rotating blade 70 is formed with six root cutting blades 71 to 76 . Of the six root-cutting blades 71-79, three root-cutting blades 71-73 are arranged in the radial direction of the rotating blade 70 from the insertion hole 72 of the rotating blade 70 toward the outer periphery. Similarly, the other three root cutting blades 74 to 76 are also arranged in the radial direction of the rotating blade 70 from the insertion hole 72 of the rotating blade 70 toward the outer circumference. The three root-cutting blades 71 to 73 and the three root-cutting blades 74 to 76 are arranged in a straight line so as to face each other with the insertion hole 72 interposed therebetween. The six root cutting blades 71 to 76 are all V-shaped (triangular) blades projecting downward from the lower surface of the rotating blade 70 . The root cutting blades 71 to 76 are formed by press working the rotating blade 70 . Specifically, the six root-cutting blades 71 to 76 are formed by making a V-shaped cut (slitting) at a predetermined position of the rotary blade 70 and pressing the cut portion downward to bend it. formed.
　本実施形態に係る刈払機１０においては、回転ブレード７０に、回転ブレード７０の下面から下方に突出する根切り用ブレード７１～７６が設けられているので、容易に畑の土を掘り起こすようにして、雑草の根を刈り取ることができる。また、回転ブレード７０の外周部分には刃が形成されていないので、仮に、回転する回転ブレード７０の外周部分に作物が当たったとしても、作物を傷つける恐れがない。さらに、図２（ａ）、（ｂ）に示されるように、回転ブレード７０を上から見たときに、根切り用ブレード７１～７６は、いずれも、回転ブレード７０の外周にはみ出していない。言い換えると、全ての根切り用ブレード７１～７６は、回転ブレード７０と上下方向に重なるように形成されている。このように、根切り用ブレード７１～７６が回転ブレード７０の外周部分からはみ出していないので、根切り用ブレード７１～７６が作物に当たって作物を傷つける恐れがない。 In the bush cutter 10 according to the present embodiment, the rotary blade 70 is provided with the root cutting blades 71 to 76 protruding downward from the lower surface of the rotary blade 70, so that the soil in the field can be easily dug up. , can cut the roots of weeds. In addition, since no edge is formed on the outer peripheral portion of the rotating blade 70, even if the crop hits the rotating outer peripheral portion of the rotating blade 70, there is no danger of damaging the crop. Furthermore, as shown in FIGS. 2A and 2B, none of the root cutting blades 71 to 76 protrude from the outer periphery of the rotating blade 70 when the rotating blade 70 is viewed from above. In other words, all the root cutting blades 71 to 76 are formed so as to vertically overlap the rotating blade 70 . Since the root-cutting blades 71-76 do not protrude from the outer peripheral portion of the rotating blade 70 in this way, there is no fear that the root-cutting blades 71-76 will hit the crop and damage the crop.
　本実施形態に係る回転ブレード７０においては、回転ブレード７０にプレス加工を施すことにより、根切り用ブレード７１～７６が回転ブレード７０と一体的に形成されている。そのため、回転ブレードと別の部品により根切り用ブレードが形成されている場合と比べて、部品点数を少なくすることができ、軽量化を図るとともに安価に形成することができる。 In the rotating blade 70 according to the present embodiment, the root cutting blades 71 to 76 are integrally formed with the rotating blade 70 by pressing the rotating blade 70 . Therefore, the number of parts can be reduced compared to the case where the blade for root cutting is formed by a part separate from the rotating blade, and the weight and cost can be reduced.
　上記実施形態において、回転ブレード７０には、６つの根切り用ブレード７１～７６が設けられていたが、根切り用ブレードの数は任意に設定しうる。 In the above embodiment, the rotary blade 70 is provided with six root-cutting blades 71 to 76, but the number of root-cutting blades can be set arbitrarily.
　上記実施形態においては、回転ブレード７０の径方向に一列に並ぶ３つの根切り用ブレード７１～７３と、回転ブレード７０の径方向に一列に並ぶ３つの根切り用ブレード７４～７６が、互いに１８０度の角度をなすように配置されていた。根切り用ブレードの配置はこのような配置には限られず、任意にしうる。例えば、回転ブレード７０の径方向に並ぶ４つの根切り用ブレード列が設けられてもよく、各根切りブレード列が互いに９０度の角度をなすように配置されていてもよい。あるいは、回転ブレード７０に複数の根切りブレードがランダムに配置されていてもよい。 In the above embodiment, the three root cutting blades 71 to 73 aligned in the radial direction of the rotary blade 70 and the three root cutting blades 74 to 76 aligned in the radial direction of the rotary blade 70 are separated from each other by 180. It was arranged to form an angle of degree. The arrangement of the root-cutting blades is not limited to such an arrangement, and may be arbitrary. For example, four rows of root-cutting blades arranged in the radial direction of the rotating blade 70 may be provided, and the rows of root-cutting blades may be arranged so as to form an angle of 90 degrees with each other. Alternatively, a plurality of root cutting blades may be randomly arranged on the rotating blade 70 .
　上記説明において、根切りブレード７１～７６は、回転ブレード７０にプレス加工を行うことによって形成された、Ｖ字状（三角形状）のブレードである。しかしながら、本発明において、根切りブレードは、回転ブレード７０の下面から下方に突出している限りにおいて、どのような形状であっても構わない。 In the above description, the root cutting blades 71 to 76 are V-shaped (triangular) blades formed by pressing the rotating blade 70 . However, in the present invention, the root cutting blade may have any shape as long as it protrudes downward from the lower surface of the rotating blade 70 .
　また、上記説明において、根切りブレード７１～７６は、回転ブレード７０にプレス加工を行うことによって金属製の回転ブレード７０から一体的に形成されている。本発明は必ずしもこのような態様には限られない。例えば、根切りブレードがネジ止め、溶接などによって回転ブレードの下面に形成されていてもよい。また、回転ブレード及び根切りブレードの材質は必ずしも金属でなくてもよく、適宜好適な材料を使用しうる。しかしながら、上記のように、金属製の回転ブレード７０にプレス加工を行うことによって、根切りブレード７１～７６を回転ブレード７０と一体的に形成することによって、部品点数を減らすことができ、製造コストを安くすることができる。また、根切りブレード７１～７６の高さ（回転ブレード７０から根切りブレード７１～７６の先端までの上下方向の長さ）は、適宜の長さにすることができる。そのため、根切りブレード７１～７６の高さが異なる複数の回転ブレード７０を用意して、用途に応じて回転ブレード７０を付け替えることもできる。 Further, in the above description, the root cutting blades 71 to 76 are integrally formed from the rotating blade 70 made of metal by pressing the rotating blade 70 . The present invention is not necessarily limited to such an aspect. For example, the root cutting blade may be formed on the lower surface of the rotary blade by screwing, welding, or the like. Further, the material of the rotary blade and the root cutting blade does not necessarily have to be metal, and any suitable material can be used. However, as described above, by performing press working on the metal rotating blade 70, by integrally forming the root cutting blades 71 to 76 with the rotating blade 70, the number of parts can be reduced, and the manufacturing cost can be made cheaper. Moreover, the height of the root cutting blades 71 to 76 (length in the vertical direction from the rotating blade 70 to the tips of the root cutting blades 71 to 76) can be set to an appropriate length. Therefore, it is possible to prepare a plurality of rotating blades 70 having root cutting blades 71 to 76 with different heights, and replace the rotating blades 70 depending on the application.
　上記実施形態においては、刈払機１０はバッテリ４２を備えており、電力で駆動されていたが、例えばエンジンにより駆動されてもよい。 In the above embodiment, the bush cutter 10 is equipped with the battery 42 and driven by electric power, but may be driven by an engine, for example.
　１０　　　刈払機
　７０　　　回転ブレード
　７１～７６　　　　根切りブレード
  10 brush cutter 70 rotary blade 71-76 root cutting blade

Claims (6)

  1. 　刈払機に取り付けられる根切り用カッターであって、
    　外周部分に刃が形成されていない円形の板状部と、
    　前記板状部の下面に配置されて、前記板状部の下面から下方に突出する、少なくとも１つの根切りブレードを有することを特徴とする根切り用カッター。     A root cutting cutter attached to a brush cutter,
    a circular plate-shaped portion having no blade formed on the outer peripheral portion;
    A cutter for root cutting, comprising at least one root cutting blade disposed on the lower surface of the plate-like portion and protruding downward from the lower surface of the plate-like portion.
  2. 　全ての前記根切りブレードは、前記板状部の上面から見て、前記板状部の外周からはみ出していない請求項１に記載の根切り用カッター。 The cutter for root cutting according to claim 1, wherein all of the root cutting blades do not protrude from the outer periphery of the plate-like portion when viewed from the upper surface of the plate-like portion.
  3. 　全ての前記根切りブレードは、前記板状部と一体形成されている請求項１又は２に記載の根切り用カッター。 The root cutting cutter according to claim 1 or 2, wherein all of the root cutting blades are integrally formed with the plate-like portion.
  4. 　刈払機であって、
    　持ち手と、
    　持ち手の一端に配置されたロータと、
    　前記ロータに回転力を付与して、前記ロータの回転軸を回転させる駆動源と、
    　前記ロータの回転軸に固定されて、前記回転軸の回転に伴って回転する円形の根切り用カッターと、を備え、
    　前記根切り用カッターは、
    　　外周部分に刃が形成されていない円形の板状部と、
    　　前記板状部の下面に配置されて、前記板状部の下面から下方に突出する、少なくとも１つの根切りブレードを有することを特徴とする刈払機。     a lawn mower,
    the holder and
    a rotor positioned at one end of the handle;
    a driving source that applies a rotational force to the rotor to rotate a rotating shaft of the rotor;
    a circular root cutting cutter that is fixed to the rotating shaft of the rotor and rotates as the rotating shaft rotates;
    The root cutting cutter is
    a circular plate-shaped portion having no blade formed on the outer peripheral portion;
    A bush cutter, comprising at least one root cutting blade disposed on the lower surface of the plate-like portion and protruding downward from the lower surface of the plate-like portion.
  5. 　全ての前記根切りブレードは、前記板状部の上面から見て、前記板状部の外周からはみ出していない請求項４に記載の回転ブレード。 The rotary blade according to claim 4, wherein all the root-cutting blades do not protrude from the outer periphery of the plate-like portion when viewed from the upper surface of the plate-like portion.
  6. 　全ての前記根切りブレードは、前記板状部と一体形成されている請求項４又は５に記載の回転ブレード。 The rotary blade according to claim 4 or 5, wherein all the root cutting blades are integrally formed with the plate-like portion.
PCT/JP2021/014572 2021-04-06 2021-04-06 Root cutter attachable to trimmer, and trimmer provided with same WO2022215148A1 (en)

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PCT/JP2021/014572 WO2022215148A1 (en) 2021-04-06 2021-04-06 Root cutter attachable to trimmer, and trimmer provided with same

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Application Number Priority Date Filing Date Title
PCT/JP2021/014572 WO2022215148A1 (en) 2021-04-06 2021-04-06 Root cutter attachable to trimmer, and trimmer provided with same

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52132831U (en) * 1976-04-03 1977-10-08
JPH02116905U (en) * 1989-03-09 1990-09-19
JPH054831U (en) * 1991-07-12 1993-01-26 株式会社中国シイ・エス・ケー Weeding rotary blade
JP2000166306A (en) * 1998-12-07 2000-06-20 Shigekatsu Moritomo Intertillage weeder
JP2009297015A (en) * 2008-06-16 2009-12-24 Isao Hori Rotary blade of mower for field
CN102823345A (en) * 2012-08-24 2012-12-19 湖南农业大学 Trash cultivator
JP3192185U (en) * 2014-05-21 2014-07-31 忠和 福島 Grass root removal adapter for mower
KR101424062B1 (en) * 2012-11-20 2014-08-13 대한민국 A motorized weeding apparatus having a fixed blade
JP2018023283A (en) * 2016-07-19 2018-02-15 鈞 村井 Bush cutter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52132831U (en) * 1976-04-03 1977-10-08
JPH02116905U (en) * 1989-03-09 1990-09-19
JPH054831U (en) * 1991-07-12 1993-01-26 株式会社中国シイ・エス・ケー Weeding rotary blade
JP2000166306A (en) * 1998-12-07 2000-06-20 Shigekatsu Moritomo Intertillage weeder
JP2009297015A (en) * 2008-06-16 2009-12-24 Isao Hori Rotary blade of mower for field
CN102823345A (en) * 2012-08-24 2012-12-19 湖南农业大学 Trash cultivator
KR101424062B1 (en) * 2012-11-20 2014-08-13 대한민국 A motorized weeding apparatus having a fixed blade
JP3192185U (en) * 2014-05-21 2014-07-31 忠和 福島 Grass root removal adapter for mower
JP2018023283A (en) * 2016-07-19 2018-02-15 鈞 村井 Bush cutter

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