JP2017035749A - Polishing machine - Google Patents

Polishing machine Download PDF

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Publication number
JP2017035749A
JP2017035749A JP2015157854A JP2015157854A JP2017035749A JP 2017035749 A JP2017035749 A JP 2017035749A JP 2015157854 A JP2015157854 A JP 2015157854A JP 2015157854 A JP2015157854 A JP 2015157854A JP 2017035749 A JP2017035749 A JP 2017035749A
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Japan
Prior art keywords
substrate
polishing
rotary blade
polishing machine
board
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JP2015157854A
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JP6548507B2 (en
Inventor
高芝　伊知郎
Ichiro Takashiba
伊知郎 高芝
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TAKASHIBA GIMUNE SEISAKUSHO KK
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TAKASHIBA GIMUNE SEISAKUSHO KK
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Priority to JP2015157854A priority Critical patent/JP6548507B2/en
Priority to PCT/JP2016/055322 priority patent/WO2017026134A1/en
Priority to KR1020167011152A priority patent/KR101821509B1/en
Priority to TW105118772A priority patent/TWI690386B/en
Publication of JP2017035749A publication Critical patent/JP2017035749A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/46—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of disc blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/02—Bench grinders

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Harvester Elements (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a polishing machine 1 capable of coping with change of the outer diameter of a rotary knife 5, and dispensing with a guide component for centering a center point of the rotary knife 5.SOLUTION: A polishing machine 1, which is a polishing machine 1 used for a rotary knife 5 of a bush cutter, includes a first substrate 3a having at least one fixed end, a second substrate 3b forming a prescribed angle with respect to the first substrate 3a, and having at least one fixed end, and polishing members 4 provided on the first substrate 3a and the second substrate 3b, for polishing the outer periphery of the rotary knife 5 in the abutting state thereon.SELECTED DRAWING: Figure 1

Description

本発明は、刈払機の回転刃の切れ味を回復または増加させるのに用いる研磨器に関する。   The present invention relates to a grinder used to recover or increase the sharpness of a rotary blade of a brush cutter.

従来、雑草の除去作業において、化石燃料または電気を利用する原動機を備えた刈払機（草刈機）が用いられている。一般的に刈払機は、メインパイプの中心付近に使用者が掴む為のハンドルを備え、メインパイプの後端に原動機が取り付けられ、先端に回転刃が取り付けられている。この回転刃の切れ味が悪くなると、取り外して研磨を行っていた。   Conventionally, in a weed removal operation, a brush cutter (mower) having a prime mover that uses fossil fuel or electricity has been used. Generally, a brush cutter has a handle for a user to grip near the center of a main pipe, a prime mover is attached to the rear end of the main pipe, and a rotary blade is attached to the tip. When the sharpness of the rotary blade deteriorated, it was removed and polished.

回転刃の取り外しと取り付け作業が面倒であるという事情を鑑みて、回転刃を取り外す必要がなく、刈払機の原動機による回転を利用した回転カッタ研削装置が発明された。（例えば特許文献１）
しかしながら、従来の回転カッタ研削装置は、回転刃の外径と研削面の曲率が不一致であったり回転刃の中心点を出すガイド部品が必要であったりすることから、使用する回転刃が限られると共に部品点数が多く高価なものであった。 In view of the fact that the removal and attachment work of the rotary blade is troublesome, there has been invented a rotary cutter grinding apparatus that does not require removal of the rotary blade and uses the rotation by the prime mover of the brush cutter. (For example, Patent Document 1)
However, the conventional rotary cutter grinding apparatus has a limited number of rotary blades because the outer diameter of the rotary blades and the curvature of the grinding surface do not match, or a guide part for obtaining the center point of the rotary blades is required. In addition, the number of parts was large and expensive.

特開２０１５−８０８２５号公報Japanese Patent Laying-Open No. 2015-80825

そこでこの発明は、回転刃の外径の変化にも対応可能であると共に回転刃の中心点を出すガイド部品を必要としない研磨器を提供することを目的とする。   Accordingly, an object of the present invention is to provide a polishing machine that can cope with a change in the outer diameter of the rotary blade and does not require a guide component for obtaining the center point of the rotary blade.

上記目的を達成するために本件発明は以下の手段を用いた。
（請求項１記載の発明）
請求項１記載の発明は、刈払機の回転刃に用いる研磨器であって、 少なくとも一端が
固設された第一基板と、 前記第一基板に対して所定の角度をなし、少なくとも一端が固
設された第二基板と、 前記第一基板及び前記第二基板に設けられ前記回転刃の外周と当
接して研磨する研磨部材とを備えることを特徴とする。
（請求項２記載の発明）
請求項２記載の発明は、請求項１記載の発明において、前記第一基板及び前記第二基板は、前記回転刃が押しつけられることにより撓む素材からなることを特徴とする。
（請求項３記載の発明）
請求項３記載の発明は、請求項２記載の研磨器において、前記第一基板及び前記第二基板における固設箇所が、回転刃の回転方向における回転刃の外周の到来側のみであることを特徴とする。 In order to achieve the above object, the present invention uses the following means.
(Invention of Claim 1)
The invention according to claim 1 is a polishing machine used for a rotary blade of a brush cutter, wherein the first substrate has at least one end fixed thereto, and forms a predetermined angle with respect to the first substrate, and at least one end is fixed. And a polishing member provided on the first substrate and the second substrate for polishing in contact with the outer periphery of the rotary blade.
(Invention of Claim 2)
According to a second aspect of the present invention, in the first aspect of the invention, the first substrate and the second substrate are made of a material that bends when the rotary blade is pressed.
(Invention of Claim 3)
According to a third aspect of the present invention, in the polishing machine according to the second aspect, the fixed location on the first substrate and the second substrate is only the arrival side of the outer periphery of the rotary blade in the rotation direction of the rotary blade. Features.

（請求項４記載の発明）
請求項４記載の発明は、請求項１から請求項３のいずれかにに記載の研磨器おいて、前記第一基板と前記第二基板のなす角度が、６０度〜１２０度であることを特徴とする。
（請求項５記載の発明）
請求項５記載の発明は、請求項１から請求項４のいずれかに記載の研磨器において、それぞれ矩形状からなる前記第一基板及び前記第二基板には長手方向に沿った長孔を備え、
前記研磨部材が前記長孔を介して前記第一基板及び前記第二基板の長手方向に沿ってス
ライド移動可能であることを特徴とする。
（請求項６記載の発明）
請求項６記載の発明は、請求項１から請求項５のいずれかに記載の研磨器において、前記第一基板と前記第二基板のそれぞれに固定される固定部材がＬ字型形状であると共に前記固定部材に立設された固定片を備えており、 前記固定片は、前記固定片を貫通した固
定孔を備えており、 前記第一基板及び前記第二基板は、回転刃の回転方向における回転
刃の外周の到来側に、貫通した固設孔を備えており、 前記固定孔と前記固設孔を挿通す
るボルトと前記ボルトと螺合するナットによって、前記第一基板及び前記第二基板がそれぞれに固定部材に固定されていることを特徴とする。 (Invention of Claim 4)
According to a fourth aspect of the present invention, in the polishing machine according to any one of the first to third aspects, an angle formed by the first substrate and the second substrate is 60 degrees to 120 degrees. Features.
(Invention of Claim 5)
According to a fifth aspect of the present invention, in the polishing machine according to any one of the first to fourth aspects, the first substrate and the second substrate each having a rectangular shape are provided with long holes along the longitudinal direction. ,
The polishing member is slidable along the longitudinal direction of the first substrate and the second substrate through the elongated hole.
(Invention of Claim 6)
According to a sixth aspect of the present invention, in the polishing machine according to any one of the first to fifth aspects, the fixing member fixed to each of the first substrate and the second substrate is L-shaped. A fixing piece standing on the fixing member, the fixing piece having a fixing hole penetrating the fixing piece, and the first substrate and the second substrate in a rotating direction of the rotary blade. A fixed hole penetrating the outer periphery of the rotary blade is provided, and the first substrate and the second substrate are formed by the fixing hole, a bolt that passes through the fixed hole, and a nut that is screwed to the bolt. Are each fixed to a fixing member.

（請求項１記載の発明の効果）
請求項１記載の発明を用いると所定の角度に角度付けされた空間の間に回転刃外周の円弧が入っていくので、回転刃の外径の変化にも対応可能であると共に回転刃の中心点を出すガイド部品を必要としない研磨器を提供することができる。
（請求項２記載の発明の効果）
請求項２記載の研磨器とすると、第一基盤及び第二基盤の弾性変形によって撓み角が生じるものとなる。これにより、研磨部材の研磨部とチップ部との当接に逃げ角を生じる。逃げ角の角度変化により、押し付けの力加減に対応した研磨が可能となる。これにより、使用者は、回転刃を傷めることに対して神経質になることなく、研磨作業を行うことができる。
（請求項３記載の発明の効果）
請求項３記載の発明であると、第一基盤及び第二基盤と回転刃外周の当接位置よりも回転刃外周の到来側（使用者から見て反時計回りの回転刃の場合、当接位置よりも時計回り側）の位置関係となり、第一基盤及び第二基盤の弾性変形と相乗的に作用し、より好適な研磨作業を行うことができる。 (Effect of the Invention of Claim 1)
According to the first aspect of the present invention, since the arc of the outer periphery of the rotary blade enters the space angled at a predetermined angle, it is possible to cope with a change in the outer diameter of the rotary blade, and the center of the rotary blade. It is possible to provide a polishing machine that does not require guide parts for marking.
(Effect of invention of Claim 2)
If it is set as the polisher of Claim 2, a bending angle will arise by the elastic deformation of a 1st base | substrate and a 2nd base | substrate. As a result, a clearance angle is generated in the contact between the polishing portion and the tip portion of the polishing member. By changing the clearance angle, it becomes possible to perform polishing corresponding to the pressing force. Thus, the user can perform the polishing operation without being nervous about damaging the rotary blade.
(Effect of invention of Claim 3)
In the invention according to claim 3, the arrival side of the outer periphery of the rotary blade relative to the contact position of the first base and the second base and the outer periphery of the rotary blade (in the case of a counterclockwise rotary blade viewed from the user, (A clockwise side of the position) and a synergistic action with the elastic deformation of the first base and the second base, and a more suitable polishing operation can be performed.

（請求項４記載の発明の効果）
６０度〜１２０度の角度で第一基板と前記第二基板を設置するのが好ましい。
（請求項５記載の発明の効果）
請求項５記載の発明のようにすると、研磨部材の研磨部が部分的にすり減ったとしても、研磨部材の位置を長孔の長さ分スライドさせることにより、すり減っていない箇所を使用することができる。これにより、研磨部材の使用期間を長くすることができる。
（請求項６記載の発明の効果）
請求項６記載の発明のようにすると、Ｌ字型形状板と基盤２枚（第一基板と第二基板）という極めて少ないメイン部品数の研磨器とすることができる。 (Effect of invention of Claim 4)
The first substrate and the second substrate are preferably installed at an angle of 60 to 120 degrees.
(Effect of invention of Claim 5)
According to the fifth aspect of the invention, even if the polishing portion of the polishing member is partially worn, it is possible to use a portion that is not worn by sliding the position of the polishing member by the length of the long hole. it can. Thereby, the use period of an abrasive | polishing member can be lengthened.
(Effect of invention of Claim 6)
According to the invention described in claim 6, it is possible to provide a polishing machine having an extremely small number of main parts, that is, an L-shaped plate and two substrates (first substrate and second substrate).

図１は、研磨器の全体斜視図である。FIG. 1 is an overall perspective view of the polishing machine. 図２は、研磨器の分解斜視図である。FIG. 2 is an exploded perspective view of the polishing machine. 図３は、固定部材と第一基板と前記第二基板の全体斜視図である。FIG. 3 is an overall perspective view of the fixing member, the first substrate, and the second substrate. 図４は、固定部材と第一基板と前記第二基板全体斜視図である。FIG. 4 is an overall perspective view of the fixing member, the first substrate, and the second substrate. 図５は、固定部材と第一基板と前記第二基板全体上面図である。FIG. 5 is an overall top view of the fixing member, the first substrate, and the second substrate. 図６は、研磨作業の開始を示す上面図である。FIG. 6 is a top view showing the start of the polishing operation. 図７は、研磨作業を示す上面図である。FIG. 7 is a top view showing the polishing operation. 図８は、研磨作業を示す部分拡大上面図である。FIG. 8 is a partially enlarged top view showing the polishing operation.

以下にこの発明の研磨器１を実施例として示す各図と共に説明する。   Below, the polisher 1 of this invention is demonstrated with each figure shown as an Example.

〔１．研磨器１について〕
図１は、研磨器１の全体斜視図である。図２は、研磨器１の分解斜視図である。
研磨器１は、図１に示すように、固定部材２と第一基板３ａと第二基板３ｂと研磨部材４を備えるものである。図２に示すように、固定部材２と第一基盤３ａと第二基盤３ｂの端部は、ボルト１０とナット１１の螺合によって固定され、研磨器１全体は、釘１２によってベース（地面や床面）に取り付けられる。
第一基盤３ａと第二基盤３ｂの所定の角度を６０°〜１２０°（好ましくは８０°〜１００°）として配置し固定することによって、研磨部材４それぞれは、刈払機回転刃５の外周に接触するものとなる。各図面では最も好ましい所定の角度９０°を採用し描画した。 [1. About polishing machine 1]
FIG. 1 is an overall perspective view of the polishing machine 1. FIG. 2 is an exploded perspective view of the polishing machine 1.
As shown in FIG. 1, the polishing machine 1 includes a fixing member 2, a first substrate 3 a, a second substrate 3 b, and a polishing member 4. As shown in FIG. 2, the end portions of the fixing member 2, the first base 3 a, and the second base 3 b are fixed by screwing bolts 10 and nuts 11. It is attached to the floor).
By arranging and fixing the predetermined angle between the first base 3a and the second base 3b as 60 ° to 120 ° (preferably 80 ° to 100 °), each of the polishing members 4 is placed on the outer periphery of the brush cutter rotary blade 5. It will be in contact. In each drawing, the most preferable predetermined angle of 90 ° is adopted and drawn.

〔２．固定部材２について〕
図３は固定部材２と第一基板３ａと第二基板３ｂの全体斜視図であり、図４は固定部材２と第一基板３ａと第二基板３ｂの全体斜視図であり、図５は固定部材２と第一基板３ａと第二基板３ｂの全体上面図である。
図１〜図５に示すように固定部材２は、ベース（地面や床面）に設置する、Ｌ字型形状の金具である。固定部材２のＬ字型形状は、内側長辺と内側短辺、外側長辺と外側短辺に分けることができる。
図３〜図５に示すように、内側短辺の内側長辺側に固定片２０が立設されており、内側長辺の内側短辺側ではないもう一端側に固定片２０が形成されている。言い換えると、内側短辺と内側長辺両方について、上から見て時計回り進行方向側の端部それぞれに固定片２０が形成されている。これにより、上から見て反時計回りの回転刃５の回転方向における回転刃５の外周の到来側に設定されたものとなる。
そして固定片２０それぞれは、固定部材２の平面に対して垂直上方に延びるものであり、固定片２０を貫通する固定孔２１が設けられている。固定孔２１それぞれは、ボルト１０の軸を通すものである。
図３〜図５に示すように、固定部材２のＬ字型形状における外側短辺と外側長辺が交わる点付近と、外側長辺の外側短辺側ではないもう一端付近と、外側短辺の外側長辺側ではないもう一端付近には、ベース固定孔２２が設けられる。ベース固定孔２２は釘１２の軸を通すものである。
固定部材２にはステンレス等の金属板を例示することができ、固定片２０は折り曲げ加工によって設けることができる。 [2. About the fixing member 2]
3 is an overall perspective view of the fixing member 2, the first substrate 3a, and the second substrate 3b. FIG. 4 is an overall perspective view of the fixing member 2, the first substrate 3a, and the second substrate 3b. FIG. It is a whole top view of member 2, the 1st substrate 3a, and the 2nd substrate 3b.
As shown in FIGS. 1 to 5, the fixing member 2 is an L-shaped metal fitting that is installed on a base (the ground surface or floor surface). The L-shaped shape of the fixing member 2 can be divided into an inner long side and an inner short side, and an outer long side and an outer short side.
As shown in FIGS. 3 to 5, the fixing piece 20 is erected on the inner long side of the inner short side, and the fixing piece 20 is formed on the other end side that is not the inner short side of the inner long side. Yes. In other words, the fixing pieces 20 are formed on both the inner short side and the inner long side at the end portions on the side in the clockwise direction as viewed from above. Thereby, it is set on the arrival side of the outer periphery of the rotary blade 5 in the rotation direction of the rotary blade 5 counterclockwise when viewed from above.
Each fixed piece 20 extends vertically upward with respect to the plane of the fixed member 2, and is provided with a fixed hole 21 that penetrates the fixed piece 20. Each of the fixing holes 21 passes the shaft of the bolt 10.
As shown in FIGS. 3 to 5, near the point where the outer short side and the outer long side intersect in the L-shaped shape of the fixing member 2, near the other end that is not the outer short side of the outer long side, and the outer short side A base fixing hole 22 is provided in the vicinity of the other end that is not on the outer long side. The base fixing hole 22 allows the shaft of the nail 12 to pass through.
The fixing member 2 can be exemplified by a metal plate such as stainless steel, and the fixing piece 20 can be provided by bending.

〔３．第一基板３ａと第二基板３ｂについて〕
図１〜図４に示すように、第一基板３ａと第二基板３ｂそれぞれは、長孔３０と、固設孔３１を備えるものである。
長孔３０は、第一基板３ａと第二基板３ｂそれぞれの長手方向に沿う態様で、矩形状である第一基板３ａと第二基板３ｂの略中央の上端部近傍と下端部近傍に設けられる。このようにすると、研磨部材４の取り付け位置を第一基板３ａと第二基板３ｂの長手方向に対してスライド可能とすることができる。
固設孔３１は、第一基板３ａと第二基板３ｂそれぞれにおいて、回転刃５の回転方向における回転刃５の外周の到来側（上から見て時計回り進行側の）端部近傍にのみ設けられる。一般的に刈払機の回転刃５は上から見て反時計回りであるから、このようにすると、第一基板３ａと第二基板３ｂそれぞれの固定位置は、第一基板３ａと第二基板３ｂそれぞれの長手方向において、研磨部材４と回転刃５の接触位置よりも回転刃５の到来側となる。
ここにおいて端部近傍の距離は、第一基板３ａと第二基板３ｂそれぞれにおいて長手距離の３％〜９％の範囲内である。図１〜図７においては、回転刃５の到来側端部から、回
転刃５の進行方向へ長手距離の６％進めた位置に、固設孔３１は設けられている。固設孔３１を第一基板３ａと第二基板３ｂそれぞれの長手方向に延びる長孔とすると、研磨部材４をスライドさせることができるため好ましい。 [3. Regarding the first substrate 3a and the second substrate 3b]
As shown in FIGS. 1 to 4, each of the first substrate 3 a and the second substrate 3 b includes a long hole 30 and a fixed hole 31.
The long hole 30 is provided in the vicinity of the upper end portion and the lower end portion of the substantially center of the first substrate 3a and the second substrate 3b which are rectangular in a mode along the longitudinal direction of each of the first substrate 3a and the second substrate 3b. . In this way, the mounting position of the polishing member 4 can be slidable in the longitudinal direction of the first substrate 3a and the second substrate 3b.
The fixed hole 31 is provided only in the first substrate 3a and the second substrate 3b in the vicinity of the end of the outer periphery of the rotary blade 5 in the rotation direction of the rotary blade 5 (on the side of clockwise advance as viewed from above). It is done. In general, the rotary blade 5 of the brush cutter is counterclockwise as viewed from above, so that the fixing positions of the first substrate 3a and the second substrate 3b are the first substrate 3a and the second substrate 3b. In each longitudinal direction, it comes to the arrival side of the rotary blade 5 from the contact position of the polishing member 4 and the rotary blade 5.
Here, the distance in the vicinity of the end portion is in the range of 3% to 9% of the longitudinal distance in each of the first substrate 3a and the second substrate 3b. 1 to 7, the fixed hole 31 is provided at a position advanced by 6% of the longitudinal distance from the arrival side end of the rotary blade 5 in the traveling direction of the rotary blade 5. It is preferable that the fixed hole 31 is a long hole extending in the longitudinal direction of each of the first substrate 3a and the second substrate 3b because the polishing member 4 can be slid.

〔４．研磨部材４について〕
研磨部材４は、図１図２に示すように、第一基板３ａと第二基板３ｂそれぞれの略中央部に取り付けられるものであって、第一基板３ａと第二基板３ｂそれぞれの短手方向の略中央に研磨部４０を備え両端近傍に長孔４１を備える。ここにおいて両端近傍の距離は、第一基板３ａと第二基板３ｂそれぞれの短手距離の７％〜１３％の範囲内である。図１と図２においては端部から１０％の距離を長孔４１の中央とした。
研磨部４０は、砥石やセラミックスなどであり、回転刃５の外周を研ぐ部材である。
長穴４１は、長穴３０により研磨部材４のスライド量をさらに増加させるものである。このようにすると研磨部４０が部分的にすり減ったとしても、研磨部材４の位置を長孔３０と長穴４１の長さを合わせてスライドさせ、研磨部４０のすり減っていない箇所を位置決めし、ボルト４２とナット４３の螺合で固定することができる。これにより、研磨部材４の使用期間を長くする（交換期間を短くする）ことができる。またボルト４２とナット４３の螺合を用いず、研磨部材４と第一基板３ａと第二基板３ｂそれぞれとを接合し一体化させる場合は、固設孔３１を長孔とすることで、前述のスライド及び位置決めを行うことができる。 [4. Regarding the polishing member 4]
As shown in FIG. 1 and FIG. 2, the polishing member 4 is attached to substantially the center of each of the first substrate 3a and the second substrate 3b, and the short direction of each of the first substrate 3a and the second substrate 3b. Is provided with a polishing portion 40 in the approximate center and a long hole 41 in the vicinity of both ends. Here, the distance in the vicinity of both ends is within a range of 7% to 13% of the short distance of each of the first substrate 3a and the second substrate 3b. In FIG. 1 and FIG.
The polishing unit 40 is a grindstone, ceramics, or the like, and is a member that sharpens the outer periphery of the rotary blade 5.
The long hole 41 further increases the sliding amount of the polishing member 4 by the long hole 30. In this way, even if the polishing unit 40 is partially worn, the position of the polishing member 4 is slid by matching the lengths of the long hole 30 and the long hole 41, and the portion of the polishing unit 40 that is not worn is positioned. The bolt 42 and the nut 43 can be fixed by screwing. Thereby, the use period of the polishing member 4 can be lengthened (the exchange period can be shortened). Further, when the polishing member 4, the first substrate 3 a, and the second substrate 3 b are joined and integrated without using the screw 42 and the nut 43, the fixing hole 31 is a long hole. Can be slid and positioned.

〔５．刈払機と研磨器１を用いた研磨作業について〕
図６は研磨作業の開始を示す上面図であり、図７は研磨作業を示す上面図であり、図８は研磨作業を示す部分拡大上面図である。
刈払機（苅払機、ブラッシュカッター)は、草や小径木を刈払うための機械のことであ
る。刈払機の構造は原動機（モーター、エンジン）、メインパイプ（シャフト、ロッド）、回転刃（チップソー）からなり、操作者は、メインパイプに固定されたハンドルを操作して刈払いを行う。一般的には右手部分にエンジンスロットルが設けられており、これを調節することでエンジンの回転数（回転刃の回転数）を調節する。エンジン式では、ドライブシャフトとの間に遠心式のクラッチがあり、始動・アイドル時などの歯の無用な回転を防ぎ、草噛みなどによる歯の停止にも備えている。
研磨作業は、図６に示すように使用者がアイドル状態で回転していない回転刃５を以下に述べる研磨器１に押し当てた後、図７に示す状態で使用者はエンジンスロットルを開き、刈払機の回転力を用いて、回転刃５の研磨を行う。
また、この発明において発明に用いられる刈払機の回転刃５は、図８に示すように外周にバナジウム鋼などの合金チップをチップ部５０として多数備えたチップソーを想定している。 [5. About polishing work using brush cutter and polisher 1]
6 is a top view showing the start of the polishing operation, FIG. 7 is a top view showing the polishing operation, and FIG. 8 is a partially enlarged top view showing the polishing operation.
A brush cutter (brusher, brush cutter) is a machine for cutting grass and small diameter trees. The structure of the brush cutter is composed of a prime mover (motor, engine), a main pipe (shaft, rod), and a rotary blade (tip saw), and an operator operates a handle fixed to the main pipe to perform brush cutting. Generally, an engine throttle is provided in the right hand portion, and the engine speed (rotation speed of the rotary blade) is adjusted by adjusting the engine throttle. In the engine type, there is a centrifugal clutch between the drive shaft and it prevents unnecessary rotation of teeth such as when starting and idling, and it also provides for stopping of teeth due to grass chewing.
In the polishing operation, as shown in FIG. 6, after the user presses the rotating blade 5 that is not rotating in the idle state against the polishing machine 1 described below, the user opens the engine throttle in the state shown in FIG. The rotary blade 5 is polished using the rotational force of the brush cutter.
Further, the rotary blade 5 of the brush cutter used in the invention in the present invention assumes a tip saw having a large number of alloy chips such as vanadium steel as the tip portion 50 on the outer periphery as shown in FIG.

〔６．研磨作業における第一基板３ａと第二基板３ｂの動きについて〕
前述のように、チップ部５０を備えた回転刃５の研磨において、回転刃５に図６の矢印方向に力が加えられると、第一基板３ａと第二基板３ｂは回転刃５に研磨部４０が押さえつけられて元の位置から変位し、撓み角３２が生まれる。この撓み角３２が生まれると、回転刃５のチップ部５０と研磨部材４の研磨部４０との接触には、図８に示すように逃げ角５１が生まれる。
平面幾何学的には、円弧と接線において、円に接線を引くと、接点で半径と垂直に交わる。このことから、回転刃５のチップ部５０が円弧位置に近似し、第一基板３ａと第二基板３ｂそれぞれの研磨部４０が接線に近似する。このことから、図６に示す態様において使用者が大きな力で回転刃５を第一基板３ａと第二基板３ｂそれぞれに押しつけた場合であっても、撓み角３２の角度が大きくなると共に、逃げ角５１の角度も大きくなる。
研磨作業時に逃げ角５１があると、チップ部５０の刃が研磨部４０に食い込む可能性が無くなると共に、その際にはじかれる（いわゆるキックバック）の可能性も無くなる。こ
のとから、使用者は、回転刃５を傷めることやキックバックに対して神経質になることなく、研磨作業を行うことができる。さらに、使用者は、回転刃５を押し付ける力加減で逃げ角５１を調整し、研ぎ具合を調節することもできる。 [6. Regarding the movement of the first substrate 3a and the second substrate 3b in the polishing operation]
As described above, in the polishing of the rotary blade 5 including the tip portion 50, when a force is applied to the rotary blade 5 in the direction of the arrow in FIG. 6, the first substrate 3a and the second substrate 3b are applied to the rotary blade 5 by the polishing portion. 40 is pressed and displaced from its original position, and a bending angle 32 is created. When this bending angle 32 is born, a clearance angle 51 is created in the contact between the tip portion 50 of the rotary blade 5 and the polishing portion 40 of the polishing member 4 as shown in FIG.
In plane geometry, when a tangent line is drawn on a circle between a circular arc and a tangent line, it intersects the radius perpendicularly at the contact point. From this, the tip portion 50 of the rotary blade 5 approximates the arc position, and the polishing portions 40 of the first substrate 3a and the second substrate 3b approximate tangent lines. Therefore, even if the user presses the rotary blade 5 against each of the first substrate 3a and the second substrate 3b with a large force in the embodiment shown in FIG. The angle 51 is also increased.
If there is a clearance angle 51 during the polishing operation, there is no possibility that the blade of the tip part 50 will bite into the polishing part 40, and there is no possibility of repelling (so-called kickback). From this, the user can perform the polishing work without damaging the rotary blade 5 or being nervous about kickback. Further, the user can adjust the sharpening condition by adjusting the clearance angle 51 by adjusting the force pressing the rotary blade 5.

１・・・研磨器
１０・・・ボルト
１１・・・ナット
１２・・・釘
２・・・固定部材
２０・・・固定片
２１・・・固定孔
２２・・・ベース固定孔
３ａ・・・第一基盤
３ｂ・・・第二基盤
３０・・・長孔
３１・・・固設孔
３２・・・撓み角
４・・・研磨部材
４０・・・研磨部
４１・・・長孔
４２・・・ボルト
４３・・・ナット
５・・・回転刃
５０・・・チップ部
５１・・・逃げ角
DESCRIPTION OF SYMBOLS 1 ... Polisher 10 ... Bolt 11 ... Nut 12 ... Nail 2 ... Fixing member 20 ... Fixing piece 21 ... Fixing hole 22 ... Base fixing hole 3a ... 1st board | substrate 3b ... 2nd board | substrate 30 ... long hole 31 ... fixed hole 32 ... deflection angle 4 ... polishing member 40 ... grinding | polishing part 41 ... long hole 42 ...・ Bolt 43 ... Nut 5 ... Rotating blade 50 ... Tip part 51 ... Clear angle

Claims (6)

刈払機の回転刃（５）に用いる研磨器（１）であって、
少なくとも一端が固設された第一基板（３ａ）と、
前記第一基板（３ａ）に対して所定の角度をなし、少なくとも一端が固設された第二基板（３ｂ）と、
前記第一基板（３ａ）及び前記第二基板（３ｂ）に設けられ前記回転刃（５）の外周と当接して研磨する研磨部材（４）とを備えることを特徴とする研磨器。 A grinder (1) used for a rotary blade (5) of a brush cutter,
A first substrate (3a) having at least one end fixed;
A second substrate (3b) having a predetermined angle with respect to the first substrate (3a) and having at least one end fixed;
A polishing machine comprising: a polishing member (4) provided on the first substrate (3a) and the second substrate (3b) for polishing in contact with the outer periphery of the rotary blade (5). 前記第一基板（３ａ）及び前記第二基板（３ｂ）は、前記回転刃（５）が押しつけられることにより撓む素材からなることを特徴とする請求項１に記載の研磨器。 The said 1st board | substrate (3a) and said 2nd board | substrate (3b) consist of a raw material which bends when the said rotary blade (5) is pressed, The polisher of Claim 1 characterized by the above-mentioned. 前記第一基板（３ａ）及び前記第二基板（３ｂ）における固設箇所が、回転刃（５）の回転方向における回転刃（５）の外周の到来側のみであることを特徴とする請求項１又は請求項２に記載の研磨器。 The fixed part in said 1st board | substrate (3a) and said 2nd board | substrate (3b) is only the arrival side of the outer periphery of the rotary blade (5) in the rotation direction of a rotary blade (5), The polishing machine according to claim 1 or 2. 前記第一基板（３ａ）と前記第二基板（３ｂ）のなす角度が、６０度〜１２０度であることを特徴とする請求項１から請求項３のいずれかにに記載の研磨器。 The polishing machine according to any one of claims 1 to 3, wherein an angle formed by the first substrate (3a) and the second substrate (3b) is 60 to 120 degrees. それぞれ矩形状からなる前記第一基板（３ａ）及び前記第二基板（３ｂ）には長手方向に沿った長孔（３０）を備え、
前記研磨部材（４）が前記長孔（３０）を介して前記第一基板（３ａ）及び前記第二基板（３ｂ）の長手方向に沿ってスライド移動可能であることを特徴とする請求項１から請求項４のいずれかに記載の研磨器。 The first substrate (3a) and the second substrate (3b) each having a rectangular shape are provided with long holes (30) along the longitudinal direction,
The polishing member (4) is slidable along the longitudinal direction of the first substrate (3a) and the second substrate (3b) through the elongated hole (30). The polishing machine according to claim 4. 前記第一基板（３ａ）と前記第二基板（３ｂ）のそれぞれに固定される固定部材（２）がＬ字型形状であると共に前記固定部材（２）に立設された固定片（２０）を備えており、前記固定片（２０）は、前記固定片（２０）を貫通した固定孔（２１）を備えており、
前記第一基板（３ａ）及び前記第二基板（３ｂ）は、回転刃（５）の回転方向における回転刃（５）の外周の到来側に、貫通した固設孔（３１）を備えており、
前記固定孔（２１）と前記固設孔（３１）を挿通するボルト（１０）と前記ボルト（１０）と螺合するナット（１１）によって、前記第一基板（３ａ）及び前記第二基板（３ｂ）がそれぞれに固定部材（２）に固定されていることを特徴とする請求項１から請求項５のいずれかに記載の研磨器。
The fixing member (2) fixed to each of the first substrate (3a) and the second substrate (3b) has an L-shape and a fixing piece (20) erected on the fixing member (2) The fixing piece (20) includes a fixing hole (21) penetrating the fixing piece (20).
Said 1st board | substrate (3a) and said 2nd board | substrate (3b) are provided with the fixed hole (31) penetrated in the arrival side of the outer periphery of the rotary blade (5) in the rotation direction of a rotary blade (5). ,
The first board (3a) and the second board (by the bolt (10) inserted through the fixing hole (21) and the fixing hole (31) and the nut (11) screwed into the bolt (10). The polishing machine according to any one of claims 1 to 5, wherein 3b) is fixed to the fixing member (2).
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437443A (en) * 1945-10-18 1948-03-09 Sporket Albert Sharpening device for lawn mowers
JP2015080825A (en) * 2013-10-21 2015-04-27 株式会社エスケー Rotary cutter grinding device
WO2015083188A1 (en) * 2013-12-02 2015-06-11 Futura S.P.A. Device for sharpening blades

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437443A (en) * 1945-10-18 1948-03-09 Sporket Albert Sharpening device for lawn mowers
JP2015080825A (en) * 2013-10-21 2015-04-27 株式会社エスケー Rotary cutter grinding device
WO2015083188A1 (en) * 2013-12-02 2015-06-11 Futura S.P.A. Device for sharpening blades

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