JPH0612B2 - Cutting blade made of synthetic resin for brush cutter for mowing - Google Patents
Cutting blade made of synthetic resin for brush cutter for mowingInfo
- Publication number
- JPH0612B2 JPH0612B2 JP1244661A JP24466189A JPH0612B2 JP H0612 B2 JPH0612 B2 JP H0612B2 JP 1244661 A JP1244661 A JP 1244661A JP 24466189 A JP24466189 A JP 24466189A JP H0612 B2 JPH0612 B2 JP H0612B2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- cutting blade
- cutting
- mowing
- synthetic resin
- 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 - Lifetime
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、草刈り用刈払機における合成樹脂製刈刃の分
野に関するものである。TECHNICAL FIELD The present invention relates to the field of synthetic resin cutting blades for mowing machines for mowing.
［従来の技術］ 従来の草刈り用刈払機の刈刃は、均一した厚さの鋼鈑を
プレス等で打ち抜き、中央に嵌挿孔を形成し、その外周
縁部に所定間隔置きに鋸刃形状の刃部を複数形成したも
のであった。[Prior Art] The cutting blade of a conventional lawn mower has a uniform thickness steel plate punched with a press or the like to form a fitting insertion hole in the center, and a saw blade shape at a predetermined interval on the outer peripheral edge thereof. Was formed with a plurality of blade portions.
さらに従来合成樹脂製の刃部として、実公昭５７−１７
０７号公報と特開昭５５−２９９２０号公報のものが開
示されていた。Furthermore, as a blade part made of conventional synthetic resin,
No. 07 and Japanese Patent Application Laid-Open No. 55-29920 have been disclosed.
また従来特開昭６１−３１０１３号公報、特開昭６４−
２５０９号公報及び特開昭５５−１１１７２３号公報
（図１）のものが開示されていた。In addition, the conventional Japanese Patent Laid-Open Nos. 61-31013 and 64-64
Japanese Unexamined Patent Publication No. 2509 and Japanese Unexamined Patent Publication No. 55-111723 (FIG. 1) have been disclosed.
［発明が解決しようとする課題］ 従来開示の実公昭５７−１７０７号公報の刃体の構造
は、合成樹脂を材料とする２枚の刃板部の間に、網板を
介在させ、上記両刃板部を以て圧着し、しかも一方の刃
板部の表面に溝部を複数形成したものであり、回転刃全
体が一体ものの合成樹脂製のものでなかった。[Problems to be Solved by the Invention] In the structure of the blade disclosed in Japanese Utility Model Publication No. 57-1707, which is disclosed in the related art, a mesh plate is interposed between two blade plates made of a synthetic resin to form the double blades. The blade portion was crimped with a plate portion, and a plurality of groove portions were formed on the surface of one blade plate portion, and the entire rotary blade was not made of synthetic resin.
さらに従来開示の特開昭５５−２９９２０号公報のもの
は、刃体が高分子弾性材からなっているが、刃板の刃部
分が表面部と裏面部より夫々尖状となるように切削され
たり、さらに表面部より傾斜した形状であり、刃部分が
表面部または裏面部に対し直角状に形成するものでなか
った。Further, in the conventional disclosure of Japanese Patent Laid-Open No. 55-29920, the blade body is made of a polymeric elastic material, but the blade portion of the blade plate is cut so that the front surface portion and the back surface portion are pointed. In addition, the shape of the blade was more inclined than the front surface portion, and the blade portion was not formed at right angles to the front surface portion or the back surface portion.
また従来開示の特開昭６１−３１０１３号公報のもの
は、金属板製にして、鋸刃が研磨して尖状となっている
こと等、刃部が表面部と裏面部に対して直角状に形成す
るものでなかった。Further, in the conventional disclosure of Japanese Patent Laid-Open No. 61-31013, the blade portion is formed in a right angle with respect to the front surface portion and the back surface portion such that the saw blade is polished to have a pointed shape. It did not form.
さらに従来開示の実開昭５５−１３９６２６号公報のも
のは、合成樹脂製円板で切削片の形状がジクザク状の傾
斜刃となしており、円板の表面部の板面に対し直角状に
はなっていなかった。Further, in the conventional disclosure of Japanese Utility Model Laid-Open No. 55-139626, a synthetic resin disk is used, and the shape of the cutting piece is a zigzag-shaped inclined blade, which is formed at a right angle to the plate surface of the surface portion of the disk. It wasn't
また従来開示の特開昭６４−２５０９号公報のものは、
金属板製にして、且切断刃は鋸刃形状に研磨して尖状と
なし材料や石材を切削するようにしたもので、草刈円盤
の表面部または裏面部に対し切断刃が直角状には形成さ
れていなかった。Further, the conventional disclosure of Japanese Patent Laid-Open No. 64-2509 discloses
It is made of a metal plate, and the cutting blade is ground into a saw-tooth shape to cut a pointed material or stone material, and the cutting blade is not perpendicular to the front or back surface of the mowing disc. It had not formed.
さらに特開昭５５−１１１７２３号公報（図１）のもの
は、鋼板製鋸刃の切刃部を尖状に切削されており、鋸刃
の表面部または裏面部に対し切断刃が直角状には形成さ
れていなかった。Further, in JP-A-55-111723 (FIG. 1), the cutting blade portion of a steel plate saw blade is cut into a pointed shape, and the cutting blade has a right angle with respect to the front surface portion or the back surface portion of the saw blade. Had not formed.
しかるに本発明の草刈り用刈払機の刈刃は、刈刃全体と
刃部とを均一の厚さの合成樹脂製とし、板材を所定の形
状にて打ち抜き形成すると共に、各刃部の形状を刈刃の
表面部または裏面部に対し直角状に形成し、一側面より
研磨して尖状にしないことを特長とし、さらに刃体の外
周部を複数個の円弧に仕切り、各円弧の外側面を切欠部
とし、中央の嵌挿孔の中心より最も長い頂部より最も短
い頂部までの約２分の１または３分の２程度の円弧部分
だけ刃部を形成し、刃付けがない部分は切欠部とした構
成にして、上記各従来公知の刈刃とは全く異った刃部に
対する刃付けのための研摩作業をなくし、製作費の著し
い節減を図るようにすると共に、刃部が摩耗してきた
ら、刃部の内側部を既存の刈刃の形状より若干小さ目に
型抜きするだけで再製品がきわめて簡単に形成できる
し、一側面部より切削しての刃付け作業が全く存しない
こと、さらに合成樹脂特有の弾力性によって、従来市販
の鋼板製刈刃と異って高速回転をさせる必要性がなく、
中速回転によって十分草刈りができるし、さらに草刈作
業中に、固い石、竹、ブロック等に当っても、刈刃全体
が弾力性と柔軟性とを有しているので、刈払機が大きく
はねられることがないものである。また固いものに当っ
て刃部が切欠するようなこともない。従って手もとや足
もとのバランスを崩すおそれもないものである。また本
発明の刈刃は、軟質または硬質合成樹脂製のため、刃部
に手指が当っても、損傷のおそれがなく、安心してつか
まえて箱詰め作業や整理整頓も極めて容易にできる。ま
た材質が軟質または硬質合成樹脂製のため、持運びのと
き若干押圧したり、折り曲げても、すぐに、復元して収
納時や、整理整頓も極めて容易である。However, the mowing blade of the lawn mower of the present invention is made of synthetic resin having a uniform thickness for the entire cutting blade and the blade portion, and punches the plate material in a predetermined shape to cut the shape of each blade portion. The blade is formed in a shape that is perpendicular to the front or back surface of the blade, and is characterized by not being sharpened by polishing from one side.In addition, the outer peripheral portion of the blade is divided into multiple arcs, and the outer surface of each arc is As a notch, only a half or two-thirds arc part from the longest to the shortest apex of the center of the insertion hole is formed with the blade, and the part without the blade is notched With the above configuration, the polishing work for blade attachment to the blade portion which is completely different from the above-mentioned conventionally known cutting blades is eliminated, and the production cost is significantly reduced, and when the blade portion is worn out, , The inner part of the blade is slightly smaller than the shape of the existing cutting blade The product can be formed very easily, there is no blade work by cutting from one side part, and due to the elasticity unique to synthetic resin, it rotates at high speed unlike conventional commercially available steel plate cutting blades. No need,
The medium-speed rotation makes it possible to sufficiently mow, and even when hitting a hard stone, bamboo, block, etc. during mowing work, the entire cutting blade has elasticity and flexibility, so a brush cutter is not It is something that cannot be asked. In addition, the blade will not be cut out by hitting a hard object. Therefore, there is no risk of losing the balance of the hands and feet. Further, since the cutting blade of the present invention is made of soft or hard synthetic resin, there is no risk of damage even if the blade portion is hit with fingers, and it is possible to catch it with ease and to perform boxing work and tidying up very easily. Further, since the material is made of soft or hard synthetic resin, even if it is slightly pressed or folded when carried, it is immediately restored and stored, and it is extremely easy to organize.
さらに従来開示の公報のものに比し、本発明の刈刃は、
各円弧中高い頂部側の一部にだけ刃部を形成することに
よって、草刈り時の初期動作である切り込みをきわめて
容易にし、草刈り時の刈取りをきわめて容易にしたもの
である。Furthermore, compared to the conventional disclosure, the cutting blade of the present invention,
By forming the blade part only on a part of the top of each arc which is high, the cutting operation, which is the initial operation at the time of mowing, is made extremely easy, and the cutting at the time of mowing is made very easy.
また従来開示の刈刃と異なって、刃部が摩耗したら、刃
部の内側に従来の刈刃より小さい形状に打ち抜き再生せ
しめ再利用または再々利用を可能にしたものである。Further, unlike the cutting blade disclosed in the related art, when the blade is worn, the blade is punched inside the blade to have a shape smaller than that of the conventional cutting blade for reuse or reuse.
［課題を解決するための手段］ 本発明は、草刈り用刈払機の刈刃において、 中央に嵌挿孔を有し、嵌挿孔の中心を通る同一長さの交
叉状直線上の頂部より所定の長さだけ中心に寄った底部
を求めると共に、頂部と底部とを円弧状に結び、嵌挿孔
の中心を通る交叉状直線の頂部及び底部の直線部分とに
よって複数個に仕切り、各円弧の外側面を切欠部とし、
嵌挿孔の中心より最も長い頂部より最も短い頂部までの
約２分の１または３分の２程度の円弧部分にだけ刃部を
形成し、前記刃付けが施されなかった部分は切欠部と
し、前記刃部を含む刈刃全体の厚みを均一とする合成樹
脂製刈刃を形成したことを特徴とする草刈り用刈払機の
合成樹脂製刈刃である。[Means for Solving the Problem] The present invention relates to a mowing blade of a mowing machine for mowing, which has a fitting insertion hole in the center, and a predetermined length from a top portion on a cross-shaped straight line having the same length passing through the center of the fitting insertion hole. Find the bottom that is closer to the center by the length of, and connect the top and bottom in an arc shape, and divide into a plurality of parts by the top and bottom straight parts of the intersecting straight line that passes through the center of the insertion hole. The outer surface is a notch,
The blade portion is formed only in the arc portion of about ½ or ⅔ from the longest portion to the shortest portion from the center of the insertion hole, and the portion not provided with the blade is a notch portion. A synthetic resin mowing blade for a mowing machine for mowing, wherein a synthetic resin mowing blade having a uniform thickness of the entire mowing blade including the blade portion is formed.
［作用］ 本発明の作用を説明すると以下のとおりである。[Operation] The operation of the present invention will be described below.
刈刃を草刈り用刈払機を構成する連結杆の先端部に取着
するときは、刈刃の表面部と裏面部よりも、中央に嵌挿
孔を有し、刈刃の大きさよりも著しく小さい形状の偏平
状当て板部を密着させて装着してやる。When attaching the cutting blade to the tip of the connecting rod that constitutes the mowing machine for mowing, the cutting blade has a fitting insertion hole in the center, rather than the front surface and the back surface, and is significantly smaller than the size of the cutting blade. The flat contact plate part of the shape is attached closely.
本発明の刈刃を装着して作業するときは、刈払機を中速
回転するだけで十分である。When working with the cutting blade of the present invention, it is sufficient to rotate the brush cutter at a medium speed.
本発明の刈刃を構成する各円弧部には、刃部群と、刃が
形成されていない切欠部の２つの部分から形成されてお
り、回転方向は刃がない切欠部より小さい形状の刃部群
へ、いわゆる「なで切り」状態となるように回転するこ
とを条件としている。Each arc portion constituting the cutting blade of the present invention is formed of two parts, a blade part group and a notched part in which the blade is not formed, and the direction of rotation is smaller than the notched part without the blade. The condition is that the parts are rotated so as to be in a so-called "cutting" state.
そのため草刈り作業時においては、回転速度を加速しな
がら刃部群が草木に対し切り込みを入れるようにして刈
刃の回転をスムーズとなしたものである。For this reason, during mowing work, the blades make a cut into the plant while accelerating the rotation speed, thereby smoothing the rotation of the cutting blade.
さらに刈刃は、固い小石や竹、ブロック等に接触して
も、刈刃の材質が軟質または硬質合成樹脂製であること
と、刃部の形状が刈刃の表面部または裏面部に対し直角
状に形成された、いわゆる肉厚が刈刃の厚さと同一で、
しかも研摩がなされていないので、刃部の肉厚が一定し
ており、摩耗が少なく、草刈り機能も十分発揮すると共
に、刈刃全体が合成樹脂製であるがために、接触時の衝
撃が小さく、従って刈刃がその反動で強く反対方向には
ねられるおそれがない。そして特に軟質合成樹脂製の刈
刃の場合は、復元力があり、従って折損のおそれがない
ものである。Furthermore, even if the cutting blade comes into contact with hard pebbles, bamboo, blocks, etc., the material of the cutting blade is made of soft or hard synthetic resin, and the shape of the cutting portion is right angle to the front or back surface of the cutting blade. The so-called wall thickness formed in the shape of the blade is the same as the thickness of the cutting blade,
Moreover, since it is not ground, the blade has a uniform wall thickness, has little wear, and exhibits a good mowing function, and since the entire cutting blade is made of synthetic resin, the impact at the time of contact is small. Therefore, there is no fear that the cutting blade will be strongly hit by the reaction in the opposite direction. Especially, in the case of a cutting blade made of soft synthetic resin, there is a restoring force, and therefore there is no fear of breakage.
また刈刃の刃部が、固い石、竹、ブロック等にあって
も、刃部が柔軟な軟質または硬質合成樹脂製であるの
で、切欠することがない。従って刃部の損傷が少ないの
で、製品寿命も極めて延命させることができる。Further, even if the blade portion of the cutting blade is on a hard stone, bamboo, block or the like, the blade portion is made of soft, soft or hard synthetic resin, so that it is not cut out. Therefore, the blade portion is less damaged, and the life of the product can be extremely extended.
また本発明の刈刃は、柔軟な軟質または硬質合成樹脂製
なので、刃部に手指が当っても、損傷したりしない。さ
らに若干丸めて収納したり、持運んでも、すぐに折曲状
態から偏平状に復元する。またケース等への収納時にお
いても、刈刃の何処の箇所をつかまえても鋼板資材製の
従来の刈刃と異って容易に作業ができる。さらに刈刃の
刃部が損傷した場合、既存の刃部より内側部分に刃部が
位置するようにして打ち抜き、再度若干ミニ化した刈刃
を再生させ再利用ができる。従って複数回再生可能であ
る。Further, since the cutting blade of the present invention is made of a soft, soft or hard synthetic resin, it will not be damaged even if a finger hits the blade portion. Even if it is rolled up a little more and stored or carried, it immediately returns from a bent state to a flat shape. Further, even when it is stored in a case or the like, no matter where the cutting blade is caught, the work can be easily performed unlike the conventional cutting blade made of steel plate material. Further, when the blade portion of the cutting blade is damaged, the blade portion is punched out so that the blade portion is located inside the existing blade portion, and the cutting blade that is slightly miniaturized can be regenerated and reused. Therefore, it can be reproduced a plurality of times.
［実施例］ 本発明の実施例を図面に依拠して説明する。[Embodiment] An embodiment of the present invention will be described with reference to the drawings.
図面において、ａは軟質または硬質合成樹脂製の回転式
板状刈刃であり、１は前記刈刃ａを構成する中央部に形
成した嵌挿孔である。前記の刈刃ａは、所定の厚さを以
て予め形成された軟質または硬質合成樹脂製板材ｃを、
型抜きして形成するか、あるいは前記の同じ材質の合成
樹脂製を以て射出成形によって量産する。In the drawing, a is a rotary plate-shaped cutting blade made of soft or hard synthetic resin, and 1 is a fitting insertion hole formed in the central portion of the cutting blade a. The cutting blade a is made of a soft or hard synthetic resin plate material c formed in advance with a predetermined thickness.
It is formed by die-cutting or is mass-produced by injection molding using a synthetic resin made of the same material as described above.
さらに本発明の刈刃ａはつぎのように形成する。すなわ
ち嵌挿孔１の中心４を通る同一長さの２本の交叉状直線
５または中心４より同じ角度で放射する直線５′の頂部
６より所定の長さだけ中心４に寄った底部７を求め、頂
部６と底部７とを円弧に結んでやる。そして頂部６と底
部７との間に形成された直線部分８′と、さらに円弧部
分８との間の外側面を切欠して切欠部２を形成する。上
述の円弧部分８のうち嵌挿孔１の中心より最も長い頂部
より最も短い頂部方向に、刈刃ａの表面部９及び裏面部
１１に対し、直角状となっている刃部３を所定の長さだ
け形成する。１０は刃先である。Further, the cutting blade a of the present invention is formed as follows. That is, the bottom 7 which is closer to the center 4 by a predetermined length than the top 6 of the two intersecting straight lines 5 of the same length passing through the center 4 of the fitting insertion hole 1 or the straight line 5'radiating at the same angle from the center 4 is provided. Then, the top portion 6 and the bottom portion 7 are connected to form an arc. Then, the notch 2 is formed by notching the outer surface between the straight line portion 8 ′ formed between the top portion 6 and the bottom portion 7 and the circular arc portion 8. In the above-mentioned arc portion 8, in the direction of the apex which is the shortest from the apex that is the longest from the center of the fitting insertion hole 1, the blade portion 3 that is in a right angle with respect to the front surface portion 9 and the rear surface portion 11 of the cutting blade a is predetermined. Form only the length. 10 is a cutting edge.
上述のように形成された本発明の刈刃ａは、使用によっ
て刈刃ａの刃先１０が摩耗して切れ味が悪くなってきた
ら、刈払機より取外し、刃部３の内側に刃部が形成さ
れ、しかも対称的にして、しかもミニ化した刈刃となる
ように、さらに刃部３の形状も、刈刃ａの表面部９また
は裏面部１１に対し直角状となるように型抜きして形成
する。そして再利用ができる。The cutting blade a of the present invention formed as described above is removed from the brush cutter when the cutting edge 10 of the cutting blade a is worn and becomes less sharp due to use, and the blade portion is formed inside the blade portion 3. In addition, the blade portion 3 is formed by die-cutting so as to be symmetrical and a miniaturized cutting blade, and the shape of the blade portion 3 is also perpendicular to the front surface portion 9 or the rear surface portion 11 of the cutting blade a. To do. And it can be reused.
さらに上述のようにミニ化した刈刃ａが使用によって刃
部３が摩滅したときは、上述と同じように刃部３の内側
に刃部が形成され、刃部３の形状を刈刃ａの表面部９ま
たは裏面部１１に対し直角状となるように型抜き形成す
る。その結果上述の刈刃ａよりミニ化した形状の刈刃ａ
が得られる。その結果再々利用ができる。Further, when the cutting portion a miniaturized as described above is used and the blade portion 3 is worn away, a blade portion is formed inside the blade portion 3 as described above, and the shape of the blade portion 3 is changed to that of the cutting blade a. Die cutting is performed so as to form a right angle with respect to the front surface portion 9 or the back surface portion 11. As a result, the cutting blade a has a more miniaturized shape than the above-mentioned cutting blade a.
Is obtained. As a result, it can be reused again.
以上のように夫々型抜きすることによって、一枚の刈刃
ａを複数回再利用ができる。また本発明の刈刃ａの大き
な特長は、刃部３に対し研削する作業が全くなく、型抜
きすることによって刃部３が簡単に形成できるのが特長
である。By cutting each die as described above, one cutting blade a can be reused a plurality of times. Further, the great feature of the cutting blade a of the present invention is that there is no work of grinding the blade portion 3 and the blade portion 3 can be easily formed by die cutting.
ｂは刈刃ａを刈払機に軸着するとき、刈刃ａの表面部９
と裏面部１１とに当って刈刃ａを固定させるための偏平
状の当て板部である。１２は連結杆、１３は連結杆１２
に取着した握り部１４付きハンドル、１５はエンジンで
ある。b is the surface portion 9 of the cutting blade a when the cutting blade a is pivotally attached to the brush cutter.
And a flat contact plate portion for fixing the cutting blade a against the rear surface portion 11. 12 is a connecting rod, 13 is a connecting rod 12
A handle with a grip portion 14 attached to the engine, and 15 are engines.
［効果］ 本発明の効果は以下のとおりである。[Effects] The effects of the present invention are as follows.
本発明の合成樹脂製刈刃の形状が、外周縁部に複数個の
切欠部を形成し、各切欠部全体に刃部を形成することな
く、最も長い頂部から最も短い頂部までの約２分の１ま
たは３分の２程度の円弧部にだけ、刈刃の表面部または
裏面部に対し、直角状の刃部を形成したことによって、
各刃部に対する刃付けといわれている研摩作業をなく
し、製作費を節減した。The shape of the synthetic resin cutting blade of the present invention forms a plurality of notches in the outer peripheral edge, and about 2 minutes from the longest apex to the shortest apex without forming a blade at the entire notches. By forming a blade section having a right angle with respect to the front surface section or the back surface section of the cutting blade only in the arc portion of about 1 or 2/3 of the above,
Eliminating the grinding work called blade attachment to each blade, we have reduced production costs.
さらに各刃部の厚みを刈刃の厚みと同一にしたので、各
刃部は回転時において尖状の状態で刈込みすることな
く、刈刃の厚みのまゝ草等に当ってカットし、従って各
刃の摩耗は、同じ合成樹脂製の刈刃の尖状となっている
従来公知の刈刃の刃部のものに比しきわめて遅いもので
ある。Furthermore, since the thickness of each blade is made the same as the thickness of the cutting blade, each blade does not cut in a pointed state during rotation, but cuts against the grass of the cutting blade thickness, etc. The wear of each blade is much slower than that of a conventionally known blade having a sharp cutting blade made of the same synthetic resin.
また本発明の刈刃は、上述のように刃部を長い頂部寄り
に集中せしめて形成したので、刈刃が回転すると、鉈で
なで切るようにして、加勢した状態で徐々に短い頂部の
刃部より長い頂部の刃部にかけて草刈りがなされ、従っ
て刃部に対する当りが自然の理にかなって切れ味を良く
し、且刃部を損傷せしめない利点を併有している。Further, since the cutting blade of the present invention is formed by concentrating the blade portion toward the long top portion as described above, when the cutting blade rotates, the cutting blade is stroked with a hook to gradually increase the length of the shorter top portion. Mowing is performed over the blade portion at the top longer than the blade portion, so that the blade portion has a merit that the contact with the blade portion naturally makes a sharp cut and does not damage the blade portion.
さらに本発明の刈刃が合成樹脂製なので、使用後刃部が
摩耗してきたときには、既存の刃部の内側より対称的に
カットしてミニ刈刃を型抜きすることによって、再利
用、再々利用ができると共に、型抜きしたミニ刈り刃の
刃部に対しては、従来の草刈り刃のように各刃を研摩す
る必要が全くなく、従って再利用にあたっても、きわめ
て安価に提供できる利点を有している。Furthermore, since the cutting blade of the present invention is made of synthetic resin, when the blade portion is worn out after use, it can be reused and reused by cutting the existing miniature blade symmetrically from the inside of the existing blade portion. In addition, it is not necessary to grind the blades of the die-cut mini-cutting blades unlike conventional grass-cutting blades. ing.
第１図は本発明草刈り用刈払機の刈刃を軸着した状態の
刈払機の斜面図、第２図は同刈刃の組立て前の斜面図、
第３図は同第２実施例の刈刃の組立て前の斜面図、第４
図は同刈刃の打ち抜き工法を示す正面図と同工法によっ
て打ち抜かれた刈刃の正面図、第５図は第１実施例の刈
刃の拡大正面図、第６図は第５図の刈刃の背面図、第７
図は同平面図、第８図は同底面図、第９図は左側面図、
第１０図は同右側面図、第１１図は第２実施例の刈刃の
拡大正面図、第１２図は同背面図、第１３図は同平面
図、第１４図は同底面図、第１５図は同左側面図、第１
６図は同右側面図である。 ａ・・・刈刃、ｂ・・・当て板部、ｃ・・・合成樹脂製
板材、１・・・嵌挿孔、２・・・切欠部、３・・・刃
部、４・・・中心、５，５′・・・直線、６・・・頂
部、７・・・底部、８・・・円弧部分、８′・・・直線
部分、９・・・表面部、１０・・・刃先、１１・・・裏
面部、１２・・・連結杆、１３・・・ハンドル、１４・
・・握り部、１５・・・エンジン。FIG. 1 is a perspective view of the brush cutter of the present invention with the cutting blade axially attached, and FIG. 2 is a perspective view of the cutting blade before assembly.
FIG. 3 is a perspective view of the cutting blade of the second embodiment before assembly, and FIG.
The figure is a front view showing the method of punching the cutting blade and a front view of the cutting blade punched by the method, FIG. 5 is an enlarged front view of the cutting blade of the first embodiment, and FIG. 6 is the cutting of FIG. Rear view of blade, 7th
The figure is the same plan view, FIG. 8 is the same bottom view, FIG. 9 is the left side view,
10 is a right side view of the same, FIG. 11 is an enlarged front view of the cutting blade of the second embodiment, FIG. 12 is a rear view of the same, FIG. 13 is a plan view of the same, and FIG. 14 is a bottom view of the same. Fig. 15 is a left side view of the same, No. 1
FIG. 6 is a right side view of the same. a ... cutting blade, b ... contact plate part, c ... synthetic resin plate material, 1 ... insertion hole, 2 ... notch part, 3 ... blade part, 4 ... Center, 5, 5 '... Straight line, 6 ... Top part, 7 ... Bottom part, 8 ... Arc part, 8' ... Straight part, 9 ... Surface part, 10 ... Cutting edge , 11 ... back side, 12 ... connecting rod, 13 ... handle, 14 ...
..Grip part, 15 ... Engine.
Claims (1)
叉状直線上の頂部より所定の長さだけ中心に寄った底部
を求めると共に、頂部と底部とを円弧状に結び、嵌挿孔
の中心を通る交叉状直線の頂部及び底部の直線部分とに
よって複数個に仕切り、各円弧の外側面を切欠部とし、
嵌挿孔の中心より最も長い頂部より最も短い頂部までの
約２分の１または３分の２程度の円弧部分にだけ刃部を
形成し、前記刃付けが施されなかった部分は切欠部と
し、前記刃部を含む刈刃全体の厚みを均一とする合成樹
脂製刈刃を形成したことを特徴とする草刈り用刈払機の
合成樹脂製刈刃。1. A mowing blade of a mowing machine for mowing, which has a fitting insertion hole at the center, and is located closer to the center by a predetermined length from the apex on an intersecting straight line of the same length passing through the center of the fitting insertion hole. Along with determining the bottom, the top and bottom are connected in an arc shape, and the top and bottom linear portions of the intersecting straight line passing through the center of the fitting hole are divided into a plurality of parts, and the outer surface of each arc is a notch,
The blade portion is formed only in the arc portion of about ½ or ⅔ from the longest portion to the shortest portion from the center of the insertion hole, and the portion not provided with the blade is a notch portion. A synthetic resin cutting blade for a lawn mower, characterized in that a synthetic resin cutting blade having a uniform thickness of the entire cutting blade including the blade portion is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1244661A JPH0612B2 (en) | 1989-09-20 | 1989-09-20 | Cutting blade made of synthetic resin for brush cutter for mowing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1244661A JPH0612B2 (en) | 1989-09-20 | 1989-09-20 | Cutting blade made of synthetic resin for brush cutter for mowing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03108409A JPH03108409A (en) | 1991-05-08 |
| JPH0612B2 true JPH0612B2 (en) | 1994-01-05 |
Family
ID=17122072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1244661A Expired - Lifetime JPH0612B2 (en) | 1989-09-20 | 1989-09-20 | Cutting blade made of synthetic resin for brush cutter for mowing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2817188B1 (en) * | 2000-11-27 | 2003-02-14 | Diam Group | SLICING DISC FOR A HOUSEHOLD SLICING APPARATUS, METHOD FOR PRODUCING SUCH A SLICING DISC AND HOUSEHOLD SLICING DEVICE COMPRISING SUCH A SLICING DISC |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55111723A (en) * | 1979-02-21 | 1980-08-28 | Toshio Aono | Rotary saw blade for bush cleaning |
| JPS57115115A (en) * | 1980-12-30 | 1982-07-17 | Takefu Tokushu Kozai Kk | Base material for circular blade of bush cutter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139626U (en) * | 1979-03-24 | 1980-10-04 |
-
1989
- 1989-09-20 JP JP1244661A patent/JPH0612B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55111723A (en) * | 1979-02-21 | 1980-08-28 | Toshio Aono | Rotary saw blade for bush cleaning |
| JPS57115115A (en) * | 1980-12-30 | 1982-07-17 | Takefu Tokushu Kozai Kk | Base material for circular blade of bush cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03108409A (en) | 1991-05-08 |
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