JPH07227124A - Tip saw for bush and grass clearing - Google Patents
Tip saw for bush and grass clearingInfo
- Publication number
- JPH07227124A JPH07227124A JP6193794A JP6193794A JPH07227124A JP H07227124 A JPH07227124 A JP H07227124A JP 6193794 A JP6193794 A JP 6193794A JP 6193794 A JP6193794 A JP 6193794A JP H07227124 A JPH07227124 A JP H07227124A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- saw
- cutting
- blades
- blade
- 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.)
- Pending
Links
Landscapes
- Harvester Elements (AREA)
Abstract
Description
(1)産業上の利用分野:本発明は超硬チップを設置し
たチップソーに関するもので、特に刈払用チップソーに
ついては、刈払現場に多数の硬質物が散在し、作用中に
鋸刃がこれらの硬質物に接触するのみか時にはチップの
尖端が大きな衝撃を受け、必然的にチップは破損し飛散
する事もあるので、非常に損失が大きく又危険であっ
た。本発明はこれらの従来のチップソーのもつ欠点を解
消し、優れた切れ味を持ち、しかも耐久性、安全性の高
いチップソーの実現を目的としたものである。 (2)従来技術:現在、草木用チップソーの殆どは木材
用、木工用のものが代用されているが、草木の刈払いに
は8枚刃前後のものが最適である事は周知の事実である
が、何しろ刃間の距離が大きい8枚刃前後のものは、そ
れに熔着されているチップの受ける硬質物との接触時の
衝撃があまりにも大きく、必然的にチップが破損あるい
は極度に磨耗するので、現在まで実用に耐えるこう云っ
た刃数の少ない刈払用チップソーは実現しなかった。か
っては、鋼板刃時代の草刈りには8枚刃が草刈刃の70
%近くを占めており、刃数の多い木工用や製材用の鋸刃
は山林の下刈用以外には殆ど利用されなかった。この事
実は刃数の少ない8枚刃前後の刈刃が刃数の多い鋸刃よ
り草木の刈払いに関する限り如何にその使用効果が優れ
ていたかを立証している。超硬チップソーの時代に入る
と磨耗に対しては強いが衝撃に弱い超硬チップは終始硬
質物と接触しながら切断作業を行わなければならない刈
払用鋸刃には適応せず、かろうじて刃数の多い鋸刃であ
る木工用、木材用のチップソーを代用しているのが現状
である。多くの人々が刃数の少ない8枚刃等の開発製造
に努力したが刃間の距離が広くチップの受ける衝撃が想
像以上に大きいので超硬チップはすぐに破損、折損し、
磨耗の段階まで使用するに至らなかった。鋼板刃の時代
には刃数の少ない8枚刃前後の鋸刃は刃数の多い40枚
前後の木工用、製材用鋸刃に較べて数倍以上の耐久性を
持っている事は周知の事実であるにも拘らず今だに刃数
の少ない刈刃が開発し実用化されない為に、木工用、製
材用の鋸刃が代用されているのが現状である。 (3)発明が解決しょうとする課題:本発明は刈払用チ
ップソーに於いて、その最大欠点である作業中のチップ
の折損及び破砕が多いのでこれを解消し、只チップの磨
耗のみに依る損傷にとどめれば鋸刃の耐久性も飛躍的に
向上し、且つ安全で経済的な鋸刃である。しかしなが
ら、対磨耗性に優れているが靱性に欠けていると云う事
のみで消耗の激しい不経済な鋸刃であると結論されてお
り、未だに鋼板刃を使用している人々も多いのが現状で
ある。本発明は上述のチップソーの対磨耗性をより以上
に向上せしめ、靱性の不足を補強する装置を増強設置し
刈払用チップソーの耐久時間を飛躍的に向上させようと
するものである。 (4)課題を解決しようとする手段:チップソーの超硬
チップの前部にチップの防御凸部を設け、作業時に超硬
チップの切刃前面及び外周部が磨耗するにつれ同時に防
御凸部の前面及び外周部も追従して磨耗し、しかも常に
凸部の外周部及び前面もチップのそれよりも必ず多量に
磨耗すると云う鋸刃の磨耗理論を活用してチップに草木
以外の不必要な硬質物(岩石、砂利、砂礫その他の硬質
物等)が接触しない様に防御凸部でチップを保護しチッ
プを硬質物との接触による衝撃から防御してチップの耐
用時間を高めるようにしたものである。 (5)作 用:硬質チップの弱点である硬質物との衝撃
に依る折損や破損を極力少なくした為、チップの耐久時
間は長くなり且つチップの磨耗損傷に依るチップの形状
の変化が極度に少なくなるので長時間使用しても鋸刃全
体の直径の減少も僅かである。この事は鋸刃全体の切れ
味の変化が少ないとの結論にもなる。詳細な原理作用に
ついては実施例を参考に詳述する。 (6)実施例と図面の説明:実施例について基因作用を
説明する。第7図の(6)は鋸刃を使用している時に草
木や硬質物が切刃に飛び込んでくる速度や角度をベクト
ルで表したもので、Rは鋸の使用時の周速度、Fは送り
速度(草刈機を振る速さ)FCはその合力と方向であ
る。通常刈払機の回転数は人に依り、又刈り取る草木に
依って異なるが、設計時に用いる大体の数値はR=50
m/s〜15m/sとしF=1.0m/s〜1.5m/
sである。例えばF=1.3とするとFCの飛込角θ=
1.5°〜5°である。上記の理論からすればTanθ
=F/Rで平均値をF=1.3m/s R=30m/s
とするとTanθ=1.3/30=0.0433 θ=
2.5゜である。直径が255mmの8枚刃の刃間の距
離L+l≒10cmであるから最外周に刃先をもつ超硬
チップ尖端にかかる被切断物の切り巾は100mm×
0.043=4.3mmである。この切り巾は鋸の回転
速度に反比例して変化する。例えば40枚刃の鋸であれ
ぼ、その切り巾は0.8mm強である。防御凸部(2)
の回転方向に対して前部切刃(4)と後部切刃(5)の
最外周の尖端は切刃(4)より切刃(5)の方が大き
く、また8枚刃の場合、超硬チップ(6)の最外周の尖
端と切刃(5)の尖端との差(S)は切刃(5)の方が
約1mm程度低い距離を保持し、チップ(6)の磨耗に
追従して磨耗する。この場合、回転体の磨耗の原理に依
り切刃(4)の方が切刃(5)よりも低く磨耗し、これ
によって生ずる切刃(4)の尖端と切刃(5)の尖端が
チップに尖端対しての差(T)は差(S)より大きい、
又これを結ぶ線は中心に対して前方より後方に向かう尻
上がりの角度となりこの形成される尻上がりの角度は鋸
刃の回転速度に反比例して増減し、また防御凸部(2)
の最尖端の切刃(5)とチップ(6)の尖端との高低差
(S)も鋸刃(1)の回転速度に反比例して変化し、ま
た刃間の距離(L+l)に比例して増減する。即ち刃数
の少ない鋸刃はその差が大きく、刃数の多い鋸刃はその
差も小さい。上記の変化の要因は回転数即ち周速度と、
刃間の距離(L+l)であり鋸刃の刃数が主となってい
る。第7図(a)は硬質物(m)が飛び込み角2°〜5
°で進入し、防御凸部の外周部(B−Cを結ぶ線)で外
部に押し出された様子を示している。この際、草木は根
径を有し地面に固着し、しかも柔らかいので外部にはね
返される事なく切断されることはいう迄もない。第1図
は8枚刃のチップソーを示しているが、中速用の鋸刃で
防御凸部の前部にある切刃部(3)との距離が少なく、
従って切り巾も少ないので防御凸部の外周部は必要とせ
ず、殆どの硬質物は回転に対して斜面になっている防御
切刃(4)によって外部に押し出され結果は後続の切刃
を保護し草木のみが選別されて後部に続く各切刃によっ
て切断される。この鋸刃は両面使用のもので、切れが悪
くなれば裏返して取り付けると反対側に設置された切刃
(5),(8)により切断作業が出来る様になったもの
である。第2図は両面使用の鋸歯状のもので、防御凸部
の切刃が前面の切刃より僅かに高いのみで、その硬質物
の衝撃も順次に吸収されるので防御凸部も比較的少な
い、こういった鋸歯状の切刃を持ったものは元来硬質物
の少ない場所で使用する事が多いものである。第3図は
低速用の鋸刃でベクトルで図示の如く、その飛び込み角
(θ’)も大きく切り巾も大きいのでチップの損傷も激
しい、この為に防御凸部とチップとの間隔も小さくし、
その上硬質物も多分に防御凸部に入り込むのでそれを防
止する切刃(4)と切刃外周部にも傾斜を保持せしめて
硬質物との衝撃を緩和せしめ、草木をなで切りする機構
になっている。第4図は硬度は非常に硬いが、反面衝撃
に対して非常に弱いサーメットのチップを装着したもの
である故一度に衝撃を与える事が出来ないので徐々に硬
質物に接触させる様にしたもので第7図(a)に点線で
示した様に使用始めには先ず切り刃の先がチップの外周
尖端より出ている切刃(4)で切断作業を行うが切刃部
の外周部は第7図(a)の中、点線で囲まれたA−B−
Cの部分は最終的には磨耗消失してその外周部はB−C
の様になって落ち着く事になる、その場合チップの最先
端と切刃(5)の尖端との差(S)は8枚刃の場合であ
るから約1mmが保持されてチップの磨耗に追従して磨
耗する。ただし、B−Cの傾斜角は鋸の回転が高ければ
緩やかに、低ければ角度が大きくなって磨耗する。上記
の如くチップは防御板の外周部が使用中に逐次磨耗する
に従ってチップの尖端部が切断作業を始め最終的には切
刃(5)との差を約1m/mに保持して切断作業を持続
する。第5図は山林下刈用(木材、草木等の専用刃)の
もので、チップ切刃(6)の前部に切刃(4),(5)
を持った防御凸部(2)を設置したもので刃間の間隔が
狭い為に防御凸部のチップ(6)の防御作用は外周部の
切刃(4)と切刃(5)との交点の鈍角の頂点付近のみ
であり、根径を有する草木は、後続する一連のチップ刃
(6)に依って切断されるが、硬質物はこの頂点の傾斜
面によつて外部に押しやられる。この場合、防御凸部の
尖端とチップ尖端との間に保持される差(S)はこの場
合(48枚刃であるから)0.2〜0.4m/mであ
る。これは実験によって確認されている。第6図は低速
用の6枚刃のチップソーを示しているが、チップ刃
(6)の硬質物からの保護は切刃(4)と、切刃(4)
と切刃(5)をつなぐ外周部に依って行っている鋸刃で
ある。この切刃(4)の傾斜面の角度は回転速度に反比
例して増減しその作用箇所の中心よりの半径は鋸刃の回
転速度に比例するがその切り巾は鋸刃の回転速度に反比
例する。第8図は第6図の防御凸部を左右方向に設置し
た両面使用の3枚刃の一部分を表して居りその作用原理
は第6図に図示したものに準ずるものである。 (7)発明の効果:現在チップソーの欠点は非常に脆
く、その長所は極度に硬いので磨耗に対する強靱だと云
う事である。本開発はこの欠点を解消し、長所をより以
上に高揚せしめたもので、その技術効果は在来のチップ
ソーの耐用時間を優に3倍〜数倍に持続させる事に成功
している。これはチップソーのチップの切損と破損が激
しいので鋸刃にチップが現状に近い状態で残留している
にも拘らず使用不能で放棄されている現状からすれば正
に国家的損失である。今回このような現状を打破し得た
のはチップの前面に防御凸部を設けこれの切刃の傾斜面
や外周部、それに凸部の高さ等を鋸刃の回転数及び刃数
に応じて種々、適宜に変化させることにより、鋼板の凸
部の靱性で以てチップの脆さを保護し、その長所である
耐磨耗性のみの利用を可能ならしめたのである。これは
鋼板の防御凸部の設置が大きく且つ又重要極まりない要
因である。(1) Industrial field of application: The present invention relates to a tip saw having a super hard tip installed. Particularly, regarding a tip saw for cutting bushes, a large number of hard objects are scattered at the cutting place and saw blades are used during operation. However, the tip of the tip is sometimes subjected to a large impact when it comes into contact with a hard material, and the tip may inevitably be broken and scattered, resulting in a great loss and a danger. The present invention is intended to eliminate the drawbacks of these conventional tip saws and to realize a tip saw having excellent sharpness, durability and safety. (2) Prior art: Most of the tip saws for vegetation are substitutes for wood and woodwork at present, but it is a well-known fact that about 8 blades are the most suitable for mowing vegetation. However, after all, in the case of 8 blades with a large distance between the blades, the impact when contacting the hard object received by the chip welded to it is too large, and the chip is inevitably damaged or extremely worn Therefore, up until now, we have not realized such a cutting saw with a small number of blades that can be practically used. In the past, when cutting grass in the steel blade age, eight blades were 70
The saw blade for woodworking and sawing, which has a large number of blades, is rarely used except for undercutting of forests. This fact proves that the cutting blades with around 8 blades having a small number of blades were superior to the saw blades with a large number of blades in terms of reaping of vegetation. When entering the era of carbide tip saws, carbide tips that are strong against wear but weak against impact have to cut while contacting hard objects from beginning to end. The current situation is to use a tip saw for woodworking and wood, which is a common saw blade. Many people made efforts to develop and manufacture 8 blades with a small number of blades, but the distance between the blades is wide and the impact on the tip is larger than expected, so the carbide tip will be broken or broken immediately.
It did not reach the stage of wear. It is well known that in the age of steel plate blades, saw blades with around 8 blades, which have few blades, are more than several times more durable than saw blades for woodworking and lumber with around 40 blades, which have many blades. Despite this fact, cutting blades with a small number of blades have not been developed and put into practical use, so the present situation is that saw blades for woodworking and sawing are substituted. (3) Problem to be Solved by the Invention: In the present invention, the most important drawback of the mowing tip saw is breakage and crushing of the tip during work, which is eliminated, and only the abrasion of the tip is used. If it is only damaged, the durability of the saw blade is dramatically improved, and it is a safe and economical saw blade. However, it is concluded that it is an uneconomical saw blade that is highly worn, but lacks in toughness, and is very economically worn, and many people still use steel plate blades. Is. The present invention intends to further improve the wear resistance of the above-mentioned tip saw, to additionally install a device for reinforcing the lack of toughness, and to drastically improve the durability time of the mowing tip saw. (4) Means to solve the problem: A tip protection protrusion is provided on the front of the carbide tip of the tip saw, and at the same time as the front edge of the cutting edge and the outer peripheral portion of the carbide tip wears during work, the front surface of the defense protrusion simultaneously. And the outer circumference also wear, and the outer circumference and the front surface of the convex part always wear more than the tip, and using the wear theory of the saw blade, the tip is an unnecessary hard material other than vegetation. The tip is protected by a protective convex part so that it does not come in contact with (rocks, gravel, gravel, and other hard objects), and the chip is protected from the impact due to contact with hard objects to increase the service life of the chip. . (5) Operation: Since the breakage and damage due to the impact with the hard material, which is the weak point of the hard tip, is minimized, the durability of the tip is extended and the change of the tip shape due to the abrasion damage of the tip is extremely changed. Since the number of blades decreases, even if the saw blade is used for a long time, the diameter of the entire saw blade is slightly reduced. This also concludes that there is little change in the sharpness of the entire saw blade. Detailed principle operation will be described in detail with reference to the embodiments. (6) Description of Examples and Drawings: The basic action of the examples will be described. (6) in FIG. 7 shows the velocity and angle at which plants and hard objects jump into the cutting blade when using the saw blade, expressed as a vector, where R is the peripheral speed when the saw is used, and F is The feed rate (the speed at which the mower is shaken) FC is the resultant force and direction. Normally, the number of rotations of a brush cutter depends on the person and the plants to be mowed, but the approximate value used during design is R = 50.
m / s to 15 m / s and F = 1.0 m / s to 1.5 m /
s. For example, assuming that F = 1.3, FC dive angle θ =
It is 1.5 ° to 5 °. From the above theory, Tan θ
= F / R and the average value is F = 1.3 m / s R = 30 m / s
Then, Tan θ = 1.3 / 30 = 0.0433 θ =
It is 2.5 °. Since the distance between the blades of eight blades with a diameter of 255 mm is L + l≈10 cm, the cutting width of the cutting object on the tip of the cemented carbide tip having the blade tip on the outermost circumference is 100 mm ×
0.043 = 4.3 mm. This cutting width changes in inverse proportion to the rotational speed of the saw. For example, a 40-blade saw has a cutting width of 0.8 mm or more. Defense convex part (2)
The outermost tips of the front cutting edge (4) and the rear cutting edge (5) are larger in the cutting edge (5) than in the cutting edge (4) with respect to the rotation direction of The difference (S) between the tip of the outermost periphery of the hard tip (6) and the tip of the cutting edge (5) is maintained at a distance of about 1 mm lower at the cutting edge (5) and follows the wear of the tip (6). Wear out. In this case, due to the principle of wear of the rotating body, the cutting edge (4) is worn lower than the cutting edge (5), and the resulting tip of the cutting edge (4) and the tip of the cutting edge (5) are chips. The difference (T) with respect to the tip is larger than the difference (S),
Also, the line connecting these is the angle of rising from the front to the rear from the center, and the formed angle of rising is increased / decreased in inverse proportion to the rotation speed of the saw blade.
The height difference (S) between the sharpest cutting edge (5) of the blade and the tip of the tip (6) also changes in inverse proportion to the rotation speed of the saw blade (1), and in proportion to the distance between the blades (L + 1). Increase or decrease. That is, a saw blade with a small number of blades has a large difference, and a saw blade with a large number of blades has a small difference. The factors of the above change are the rotational speed, that is, the peripheral speed
It is the distance between the blades (L + 1) and is mainly the number of saw blades. FIG. 7 (a) shows that the hard material (m) has a plunge angle of 2 ° to 5 °.
It shows a state that it entered at an angle of ° and was pushed out to the outside at the outer peripheral portion (the line connecting B-C) of the defense convex portion. At this time, it is needless to say that the plant has a root diameter and adheres to the ground, and is soft, so that it is cut without being repelled to the outside. FIG. 1 shows an 8-blade tip saw, but it is a saw blade for medium speed and has a small distance from the cutting edge portion (3) in front of the protective convex portion,
Therefore, since the cutting width is small, the outer peripheral part of the protection convex part is not necessary, and most hard materials are pushed out by the protection cutting blade (4) which is a slope against rotation and the result protects the following cutting blade. Only the vegetation is sorted and cut by each cutting edge that follows the rear. This saw blade uses both sides, and if it becomes difficult to cut, it can be turned over and installed so that the cutting work can be performed by the cutting blades (5) and (8) installed on the opposite side. Fig. 2 is a saw-tooth type with double-sided use. The cutting edge of the protective convex part is only slightly higher than the front cutting edge, and the impact of the hard objects is also absorbed in sequence, so there are relatively few protective convex parts. , Those with such a saw-tooth cutting blade are often used in places with few hard objects. As shown in Fig. 3 by a low-speed saw blade in vector form, the plunge angle (θ ') is large and the cutting width is large, so the chip is severely damaged. For this reason, the interval between the protective convex portion and the chip is reduced. ,
In addition, a hard object probably also enters the protective convex part, so the cutting edge (4) that prevents it and the outer peripheral part of the cutting edge also hold an inclination to alleviate the impact with the hard object, and stroke the plant It has become. Fig. 4 shows that the hardness is very hard, but on the other hand it is a cermet tip that is very weak against impact, so it is not possible to give an impact at once, so it is made to come into contact with a hard object gradually. Then, as shown by the dotted line in FIG. 7 (a), at the beginning of use, first the cutting work is carried out with the cutting blade (4) whose tip of the cutting edge protrudes from the outer peripheral tip of the tip. In FIG. 7 (a), AB- surrounded by a dotted line
Eventually, the part C disappears due to wear, and the outer peripheral part is BC
In that case, the difference (S) between the tip of the tip and the tip of the cutting edge (5) is 8 blades, so about 1 mm is retained and follows the wear of the tip. Wear out. However, the inclination angle of B-C is gentle when the rotation of the saw is high, and the angle is large when the rotation of the saw is low, and the blade wears. As described above, the tip begins cutting work as the outer periphery of the protection plate is worn out during use, and finally the difference between the tip and the cutting edge (5) is maintained at about 1 m / m for cutting work. To last. Fig. 5 is for underforest cutting (dedicated blade for wood, vegetation, etc.) and has cutting blades (4), (5) in front of the tip cutting blade (6).
Since the protective convex portion (2) with a blade is installed and the interval between the blades is narrow, the protective action of the tip (6) of the protective convex portion is that of the cutting edge (4) and the cutting edge (5) of the outer peripheral portion. The vegetation having the root diameter only near the apex of the obtuse angle of the intersection is cut by the following series of chip blades (6), but the hard material is pushed outward by the inclined surface of the apex. In this case, the difference (S) held between the tip of the protection protrusion and the tip of the tip is 0.2 to 0.4 m / m in this case (since it is 48 blades). This has been confirmed by experiments. FIG. 6 shows a 6-blade tip saw for low speed, but the tip blade (6) is protected from hard objects by the cutting blade (4) and the cutting blade (4).
It is a saw blade which is performed by the outer peripheral portion connecting the cutting edge (5) and the cutting edge (5). The angle of the inclined surface of the cutting blade (4) increases / decreases in inverse proportion to the rotation speed, and the radius from the center of its operating portion is proportional to the rotation speed of the saw blade, but its cutting width is inversely proportional to the rotation speed of the saw blade. . FIG. 8 shows a part of a double-sided three-blade in which the protection projections of FIG. 6 are installed in the left-right direction, and the principle of operation is similar to that shown in FIG. (7) Advantages of the Invention: At present, the drawback of a tip saw is that it is very brittle, and its advantage is that it is extremely hard and therefore it is resistant to wear. This development solves this drawback and raises the advantage even further, and its technical effect has succeeded in sustaining the service life of conventional tip saws by a factor of three to several times. This is a national loss in view of the fact that the chips of the saw blade are severely damaged and broken, and therefore the saw blades are left unusable despite being left in a state close to the current state. What was able to overcome this situation this time is to provide a protective convex portion on the front surface of the tip, and to adjust the inclined surface and outer peripheral portion of this cutting edge, and the height of the convex portion according to the rotation speed and the number of blades of the saw blade. By appropriately changing the above, the brittleness of the chip is protected by the toughness of the convex portion of the steel sheet, and it is possible to utilize only the advantage of abrasion resistance. This is a factor in which the installation of the protective convex portion of the steel plate is large and is not very important.
:(1)……刃体(デスク) (2)……防御凸部 (3)……切刃部 (4).(4’)……切刃(防御部切刃) (5)……切刃(防御部切刃) (6).(6’)……超硬チップ (7).(7’)……切刃 (8)……切刃 : (1) …… Blade (desk) (2) …… Defense convex part (3) …… Cutting edge part (4). (4 ') ... cutting edge (defense section cutting edge) (5) ... cutting edge (defense section cutting edge) (6). (6 ') ... Carbide tip (7). (7 ') …… cutting edge (8) …… cutting edge
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【手続補正書】[Procedure amendment]
【提出日】平成6年7月18日[Submission date] July 18, 1994
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の詳細な説明[Name of item to be amended] Detailed explanation of the invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【発明の詳細な説明】Detailed Description of the Invention
【産業上の利用分野】本発明は超硬チップを設置したチ
ップソーに関するもので、特に刈払用チップソーについ
ては、刈払現場に多数の硬質物が散在し、作用中に鋸刃
がこれらの硬質物に接触するのみか時にはチップの尖端
が大きな衝撃を受け、必然的にチップは破損し飛散する
事もあるので、非常に損失が大きく又危険であった。本
発明はこれらの従来のチップソーのもつ欠点を解消し、
優れた切れ味を持ち、しかも耐久性、安全性の高いチッ
プソーの実現を目的としたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip saw having a super hard tip installed, and in particular for a tip saw for cutting bushes, a large number of hard objects are scattered at the cutting site, and the saw blades are hard during operation. The tip of the tip is sometimes subjected to a large impact when it only comes into contact with an object, and the tip may inevitably be broken and scattered, resulting in a great loss and danger. The present invention eliminates the drawbacks of these conventional tip saws,
It is intended to realize a tip saw that has excellent sharpness and is highly durable and safe.
【従来技術】現在、草木用チップソーの殆どは木材用、
木工用のものが代用されているが、草木の刈払いには8
枚刃前後のものが最適である事は周知の事実であるが、
何しろ刃間の距離が大きい8枚刃前後のものは、それに
熔着されているチップの受ける硬質物との接触時の衝撃
があまりにも大きく、必然的にチップが破損あるいは極
度に磨耗するので、現在まで実用に耐えるこう云った刃
数の少ない刈払用チップソーは実現しなかった。かって
は、鋼板刃時代の草刈りには8枚刃が草刈刃の70%近
くを占めており、刃数の多い木工用や製材用の鋸刃は山
林の下刈用以外には殆ど利用されなかった。この事実は
刃数の少ない8枚刃前後の刈刃が刃数の多い鋸刃より草
木の刈払いに関する限り如何にその使用効果が優れてい
たかを立証している。超硬チップソーの時代に入ると磨
耗に対しては強いが衝撃に弱い超硬チップは終始硬質物
と接触しながら切断作業を行わなければならない刈払用
鋸刃には適応せず、かろうじて刃数の多い鋸刃である木
工用、木材用のチップソーを代用しているのが現状であ
る。多くの人々が刃数の少ない8枚刃等の開発製造に努
力したが刃間の距離が広くチップの受ける衝撃が想像以
上に大きいので超硬チップはすぐに破損、折損し、磨耗
の段階まで使用するに至らなかった。鋼板刃の時代には
刃数の少ない8枚刃前後の鋸刃は刃数の多い40枚前後
の木工用、製材用鋸刃に較べて数倍以上の耐久性を持っ
ている事は周知の事実であるにも拘らず今だに刃数の少
ない刈刃が開発し実用化されない為に、木工用、製材用
の鋸刃が代用されているのが現状である。2. Description of the Related Art Currently, most tip saws for plants are for wood,
Woodworking ones have been used instead, but for cutting bushes 8
It is a well-known fact that the one with a single blade is best,
After all, if there are around 8 blades with a large distance between the blades, the impact when the tip welded to the hard object is too large and the tip is inevitably damaged or extremely worn, Until now, we have not realized a cutting saw with a small number of blades that can be used practically. In the past, eight blades accounted for nearly 70% of grass cutting blades in the age of steel plate blades, and saw blades for woodworking and sawing, which had a large number of blades, were rarely used except for cutting under the forest. . This fact proves that the cutting blades with around 8 blades having a small number of blades were superior to the saw blades with a large number of blades in terms of reaping of vegetation. When entering the era of carbide tip saws, carbide tips that are strong against wear but weak against impact have to cut while contacting hard objects from beginning to end. The current situation is to use a tip saw for woodworking and wood, which is a common saw blade. Many people have made efforts to develop and manufacture 8 blades with a small number of blades, but the distance between the blades is wide and the impact on the tip is greater than expected, so the carbide tip immediately breaks, breaks, and wears out. I didn't use it. It is well known that in the age of steel plate blades, saw blades with around 8 blades, which have few blades, are more than several times more durable than saw blades for woodworking and lumber with around 40 blades, which have many blades. Despite this fact, cutting blades with a small number of blades have not been developed and put into practical use, so the present situation is that saw blades for woodworking and sawing are substituted.
【発明が解決しょうとする課題】本発明は刈払用チップ
ソーに於いて、その最大欠点である作業中のチップの折
損及び破砕が多いのでこれを解消し、只チップの磨耗の
みに依る損傷にとどめれば鋸刃の耐久性も飛躍的に向上
し、且つ安全で経済的な鋸刃である。しかしながら、対
磨耗性に優れているが靱性に欠けていると云う事のみで
消耗の激しい不経済な鋸刃であると結論されており、未
だに鋼板刃を使用している人々も多いのが現状である。
本発明は上述のチップソーの対磨耗性をより以上に向上
せしめ、靱性の不足を補強する装置を増強設置し刈払用
チップソーの耐久時間を飛躍的に向上させようとするも
のである。DISCLOSURE OF THE INVENTION The present invention provides a cutting tip saw with a large number of breakages and crushes during work, which is the greatest drawback of the cutting tip saw. Therefore, this problem is solved, and damage is caused only by abrasion of the tip. If it is stopped, the durability of the saw blade is dramatically improved, and it is a safe and economical saw blade. However, it is concluded that it is an uneconomical saw blade that is highly worn, but lacks in toughness, and is very economically worn, and many people still use steel plate blades. Is.
The present invention intends to further improve the wear resistance of the above-mentioned tip saw, to additionally install a device for reinforcing the lack of toughness, and to drastically improve the durability time of the mowing tip saw.
【課題を解決しようとする手段】チップソーの超硬チッ
プの前部にチップの防御凸部を設け、作業時に超硬チッ
プの切刃前面及び外周部が磨耗するにつれ同時に防御凸
部の前面及び外周部も追従して磨耗し、しかも常に凸部
の外周部及び前面もチップのそれよりも必ず多量に磨耗
すると云う鋸刃の磨耗理論を活用してチップに草木以外
の不必要な硬質物(岩石、砂利、砂礫その他の硬質物
等)が接触しない様に防御凸部でチップを保護しチップ
を硬質物との接触による衝撃から防御してチップの耐用
時間を高めるようにしたものである。[Problems to be Solved by the Invention] A tip convex portion is provided on the front part of a cemented carbide tip of a tip saw, and at the same time as the front surface and outer peripheral portion of the cutting edge of the cemented carbide tip are worn during work, the front surface and outer periphery of the protective convex portion simultaneously The wear theory of the saw blade says that the parts also wear along with each other, and that the outer peripheral part and the front surface of the convex parts always wear more than the tip. , Gravel, gravel, and other hard materials) are protected from contact with the protective projections to protect the chips from impact due to contact with hard materials, thereby increasing the life of the chips.
【作用】硬質チップの弱点である硬質物との衝撃に依る
折損や破損を極力少なくした為、チップの耐久時間は長
くなり且つチップの磨耗損傷に依るチップの形状の変化
が極度に少なくなるので長時間使用しても鋸刃全体の直
径の減少も僅かである。この事は鋸刃全体の切れ味の変
化が少ないとの結論にもなる。詳細な原理作用について
は実施例を参考に詳述する。[Function] Since the breakage and damage due to impact with a hard object, which is a weak point of the hard chip, is minimized, the durability of the chip is prolonged and the change of the shape of the chip due to abrasion damage of the chip is extremely reduced. Even when used for a long time, the diameter of the entire saw blade is slightly reduced. This also concludes that there is little change in the sharpness of the entire saw blade. Detailed principle operation will be described in detail with reference to the embodiments.
【実施例と図面の説明】実施例について基因作用を説明
する。第7図の(6)は鋸刃を使用している時に草木や
硬質物が切刃に飛び込んでくる速度や角度をベクトルで
表したもので、Rは鋸の使用時の周速度、Fは送り速度
(草刈機を振る速さ)FCはその合力と方向である。通
常刈払機の回転数は人に依り、又刈り取る草木に依って
異なるが、設計時に用いる大体の数値は R=50m
/s〜15m/sとしF=1.0m/s〜1.5m/s
である。例えばF=1.3とするとFCの飛込角θ=
1.5°〜5°である。上記の理論からすればTanθ
=F/Rで平均値をF=1.3m/sR=30m/sと
するとTanθ=1.3/30=0.0433 θ=
2.5゜である。直径が255mmの8枚刃の刃間の距
離L+l≒10cmであるから最外周に刃先をもつ超硬
チップ尖端にかかる被切断物の切り巾は100mm×
0.043=4.3mmである。この切り巾は鋸の回転
速度に反比例して変化する。例えば40枚刃の鋸であれ
ば、その切り巾は0.8mm強である。防御凸部(2)
の回転方向に対して前部切刃(4)と後部切刀(5)の
最外周の尖端は切刃(4)より切刃(5)の方が大き
く、また8枚刃の場合、超硬チップ(6)の最外周の尖
端と切刃(5)の尖端との差(S)は切刃(5)の方が
約1mm程度低い距離を保持し、チップ(6)の磨耗に
追従して磨耗する。この場合、回転体の磨耗の原理に依
り切刃(4)の方が切刃(5)よりも低く磨耗し、これ
によって生ずる切刃(4)の尖端と切刃(5)の尖端が
チップに尖端対しての差(T)は差(S)より大きい、
又これを結ぶ線は中心に対して前方より後方に向かう尻
上がりの角度となりこの形成される尻上がりの角度は鋸
刃の回転速度に反比例して増減し、また防御凸部(2)
の最尖端の切刃(5)とチップ(6)の尖端との高低差
(S)も鋸刃(1)の回転速度に反比例して変化し、ま
た刃間の距離(L+l)に比例して増減する。即ち刃数
の少ない鋸刃はその差が大きく、刃数の多い鋸刃はその
差も小さい。上記の変化の要因は回転数即ち周速度と、
刃間の距離(L+l)であり鋸刃の刃数が主となってい
る。第7図(a)は硬質物(m)が飛び込み角2°〜5
°で進入し、防御凸部の外周部(B−Cを結ぶ線)で外
部に押し出された様子を示している。この際、草木は根
径を有し地面に固着し、しかも柔らかいので外部にはね
返される事なく切断されることはいう迄もない。第1図
は8枚刃のチップソーを示しているが、中速用の鋸刃で
防御凸部の前部にある切刃部(3)との距離が少なく、
従って切り巾も少ないので防御凸部の外周部は必要とせ
ず、殆どの硬質物は回転に対して斜面になっている防御
切刃(4)によって外部に押し出され結果は後続の切刃
を保護し草木のみが選別されて後部に続く各切刃によっ
て切断される。この鋸刃は両面使用のもので、切れが悪
くなれば裏返して取り付けると反対側に設置された切刃
(5),(8)により切断作業が出来る様になったもの
である。第2図は両面使用の鋸歯状のもので、防御凸部
の切刃が前面の切刃より僅かに高いのみで、その硬質物
の衝撃も順次に吸収されるので防御凸部も比較的少な
い、こういった鋸歯状の切刃を持ったものは元来硬質物
の少ない場所で使用する事が多いものである。第3図は
低速用の鋸刃でベクトルで図示の如く、その飛び込み角
(θ’)も大きく切り巾も大きいのでチップの損傷も激
しい、この為に防御凸部とチップとの間隔も小さくし、
その上硬質物も多分に防御凸部に入り込むのでそれを防
止する切刃(4)と切刃外周部にも傾斜を保持せしめて
硬質物との衝撃を緩和せしめ、草木をなで切りする機構
になっている。第4図は硬度は非常に硬いが、反面衝撃
に対して非常に弱いサーメットのチップを装着したもの
である故一度に衝撃を与える事が出来ないので徐々に硬
質物に接触させる様にしたもので第7図(a)に点線で
示した様に使用始めには先ず切り刃の先がチップの外周
尖端より出ている切刃(4)で切断作業を行うが切刃部
の外周部は第7図(a)の中、点線で囲まれたA−B−
Cの部分は最終的には磨耗消失してその外周部はB−C
の様になって落ち着く事になる、その場合チップの最先
端と切刃(5)の尖端との差(S)は8枚刃の場合であ
るから約1mmが保持されてチップの磨耗に追従して磨
耗する。ただし、B−Cの傾斜角は鋸の回転が高ければ
緩やかに、低ければ角度が大きくなって磨耗する。上記
の如くチップは防御板の外周部が使用中に逐次磨耗する
に従ってチップの尖端部が切断作業を始め最終的には切
刃(5)との差を約1m/mに保持して切断作業を持続
する。第5図は山林下刈用(木材、草木等の専用刃)の
もので、チップ切刃(6)の前部に切刃(4),(5)
を持った防御凸部(2)を設置したもので刃間の間隔が
狭い為に防御凸部のチップ(6)の防御作用は外周部の
切刃(4)と切刃(5)との交点の鈍角の頂点付近のみ
であり、根径を有する草木は、後続する一連のチップ刃
(6)に依って切断されるが、硬質物はこの頂点の傾斜
面によつて外部に押しやられる。この場合、防御凸部の
尖端とチップ尖端との間に保持される差(S)はこの場
合(48枚刃であるから)0.2〜0.4m/mであ
る。これは実験によって確認されている。第6図は低速
用の6枚刃のチップソーを示しているが、チップ刃
(6)の硬質物からの保護は切刃(4)と、切刃(4)
と切刃(5)をつなぐ外周部に依って行っている鋸刃で
ある。この切刃(4)の傾斜面の角度は回転速度に反圧
例して増減しその作用箇所の中心よりの半径は鋸刃の回
転速度に比例するがその切り巾は鋸刃の回転速度に反比
例する。第8図は第6図の防御凸部を左右方向に設置し
た両面使用の3枚刃の一部分を表して居りその作用原理
は第6図に図示したものに準ずるものである。Description of Embodiments and Drawings The basic action of the embodiment will be described. (6) in FIG. 7 shows the velocity and angle at which plants and hard objects jump into the cutting blade when using the saw blade, expressed as a vector, where R is the peripheral speed when the saw is used, and F is The feed rate (the speed at which the mower is shaken) FC is the resultant force and direction. Normally, the number of rotations of a brush cutter depends on the person and the plants to be cut, but the approximate value used during design is R = 50m.
/ S to 15 m / s and F = 1.0 m / s to 1.5 m / s
Is. For example, assuming that F = 1.3, FC dive angle θ =
It is 1.5 ° to 5 °. From the above theory, Tan θ
= F / R and the average value is F = 1.3 m / s R = 30 m / s, Tan θ = 1.3 / 30 = 0.0433 θ =
It is 2.5 °. Since the distance between the blades of eight blades with a diameter of 255 mm is L + l≈10 cm, the cutting width of the cutting object on the tip of the cemented carbide tip having the blade tip on the outermost circumference is 100 mm ×
0.043 = 4.3 mm. This cutting width changes in inverse proportion to the rotational speed of the saw. For example, in the case of a 40-blade saw, the cutting width is a little over 0.8 mm. Defense convex part (2)
The outermost tips of the front cutting blade (4) and the rear cutting blade (5) are larger in the cutting blade (5) than in the cutting blade (4) with respect to the rotation direction of The difference (S) between the tip of the outermost periphery of the hard tip (6) and the tip of the cutting edge (5) is maintained at a distance of about 1 mm lower at the cutting edge (5) and follows the wear of the tip (6). Wear out. In this case, due to the principle of wear of the rotating body, the cutting edge (4) is worn lower than the cutting edge (5), and the resulting tip of the cutting edge (4) and the tip of the cutting edge (5) are chips. The difference (T) with respect to the tip is larger than the difference (S),
Also, the line connecting these is the angle of rising from the front to the rear from the center, and the formed angle of rising is increased / decreased in inverse proportion to the rotation speed of the saw blade.
The height difference (S) between the sharpest cutting edge (5) of the blade and the tip of the tip (6) also changes in inverse proportion to the rotation speed of the saw blade (1), and in proportion to the distance between the blades (L + 1). Increase or decrease. That is, a saw blade with a small number of blades has a large difference, and a saw blade with a large number of blades has a small difference. The factors of the above change are the rotational speed, that is, the peripheral speed
It is the distance between the blades (L + 1) and is mainly the number of saw blades. FIG. 7 (a) shows that the hard material (m) has a plunge angle of 2 ° to 5 °.
It shows a state that it entered at an angle of ° and was pushed out to the outside at the outer peripheral portion (the line connecting B-C) of the defense convex portion. At this time, it is needless to say that the plant has a root diameter and adheres to the ground, and is soft, so that it is cut without being repelled to the outside. FIG. 1 shows an 8-blade tip saw, but it is a saw blade for medium speed and has a small distance from the cutting edge portion (3) in front of the protective convex portion,
Therefore, since the cutting width is small, the outer peripheral part of the protection convex part is not necessary, and most hard materials are pushed out by the protection cutting blade (4) which is a slope against rotation and the result protects the following cutting blade. Only the vegetation is sorted and cut by each cutting edge that follows the rear. This saw blade uses both sides, and if it becomes difficult to cut, it can be turned over and installed so that the cutting work can be performed by the cutting blades (5) and (8) installed on the opposite side. Fig. 2 is a saw-tooth type with double-sided use. The cutting edge of the protective convex part is only slightly higher than the front cutting edge, and the impact of the hard objects is also absorbed in sequence, so there are relatively few protective convex parts. , Those with such a saw-tooth cutting blade are often used in places with few hard objects. As shown in Fig. 3 by a low-speed saw blade in vector form, the plunge angle (θ ') is large and the cutting width is large, so the chip is severely damaged. For this reason, the interval between the protective convex portion and the chip is reduced. ,
In addition, a hard object probably also enters the protective convex part, so the cutting edge (4) that prevents it and the outer peripheral part of the cutting edge also hold an inclination to alleviate the impact with the hard object, and stroke the plant It has become. Fig. 4 shows that the hardness is very hard, but on the other hand it is a cermet tip that is very weak against impact, so it is not possible to give an impact at once, so it is made to come into contact with a hard object gradually. Then, as shown by the dotted line in FIG. 7 (a), at the beginning of use, first the cutting work is carried out with the cutting blade (4) whose tip of the cutting edge protrudes from the outer peripheral tip of the tip. In FIG. 7 (a), AB- surrounded by a dotted line
Eventually, the part C disappears due to wear, and the outer peripheral part is BC
In that case, the difference (S) between the tip of the tip and the tip of the cutting edge (5) is 8 blades, so about 1 mm is retained and follows the wear of the tip. Wear out. However, the inclination angle of B-C is gentle when the rotation of the saw is high, and the angle is large when the rotation of the saw is low, and the blade wears. As described above, the tip begins cutting work as the outer periphery of the protection plate is worn out during use, and finally the difference between the tip and the cutting edge (5) is maintained at about 1 m / m for cutting work. To last. Fig. 5 is for underforest cutting (dedicated blade for wood, vegetation, etc.) and has cutting blades (4), (5) in front of the tip cutting blade (6).
Since the protective convex portion (2) with a blade is installed and the interval between the blades is narrow, the protective action of the tip (6) of the protective convex portion is that of the cutting edge (4) and the cutting edge (5) of the outer peripheral portion. The vegetation having the root diameter only near the apex of the obtuse angle of the intersection is cut by the following series of chip blades (6), but the hard material is pushed outward by the inclined surface of the apex. In this case, the difference (S) held between the tip of the protection protrusion and the tip of the tip is 0.2 to 0.4 m / m in this case (since it is 48 blades). This has been confirmed by experiments. FIG. 6 shows a 6-blade tip saw for low speed, but the tip blade (6) is protected from hard objects by the cutting blade (4) and the cutting blade (4).
It is a saw blade which is performed by the outer peripheral portion connecting the cutting edge (5) and the cutting edge (5). The angle of the sloping surface of the cutting blade (4) increases / decreases while counter-pressing against the rotation speed, and the radius from the center of its action point is proportional to the rotation speed of the saw blade, but its cutting width depends on the rotation speed of the saw blade. Inversely proportional. FIG. 8 shows a part of a double-sided three-blade in which the protection projections of FIG. 6 are installed in the left-right direction, and the principle of operation is similar to that shown in FIG.
【発明の効果】現在チップソーの欠点は非常に脆く、そ
の長所は極度に硬いので磨耗に対する強靭だと云う事で
ある。本開発はこの欠点を解消し、長所をより以上に高
揚せしめたもので、その技術効果は在来のチップソーの
耐用時間を優に3倍〜数倍に持続させる事に成功してい
る。これはチップソーのチップの切損と破損が激しいの
で鋸刃にチップが現状に近い状態で残留しているにも拘
らず使用不能で放棄されている現状からすれば正に国家
的損失である。今回このような現状を打破し得たのはチ
ップの前面に防御凸部を設けこれの切刃の傾斜面や外周
部、それに凸部の高さ等を鋸刃の回転数及び刃数に応じ
て種々、適宜に変化させることにより、鋼板の凸部の靱
性で以てチップの脆さを保護し、その長所である耐磨耗
性のみの利用を可能ならしめたのである。これは鋼板の
防御凸部の設置が大きく且つ又重要極まりない要因であ
る。At present, the drawback of the tip saw is that it is very brittle, and the advantage thereof is that it is extremely hard and therefore it is resistant to abrasion. This development solves this drawback and raises the advantage even further, and its technical effect has succeeded in sustaining the service life of conventional tip saws by a factor of three to several times. This is a national loss in view of the fact that the chips of the saw blade are severely damaged and broken, and therefore the saw blades are left unusable despite being left in a state close to the current state. What was able to overcome this situation this time is to provide a protective convex portion on the front surface of the tip, and to adjust the inclined surface and outer peripheral portion of this cutting edge, and the height of the convex portion according to the rotation speed and the number of blades of the saw blade. By appropriately changing the above, the brittleness of the chip is protected by the toughness of the convex portion of the steel sheet, and it is possible to utilize only the advantage of abrasion resistance. This is a factor in which the installation of the protective convex portion of the steel plate is large and is not very important.
【手続補正2】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図1】刈払要チップソーの正面図である。FIG. 1 is a front view of a tip saw for mowing.
【図2】刈払用チップソーの中央より上部の正面図であ
る。FIG. 2 is a front view of the upper part of the cutting brush saw from the center.
【図3】刈払用チップソーの上部の部分正面図と作業時
に草木や硬質微粒子及び砂礫等が切刃に飛び込んでくる
角度と速度をベクトルで表した図である。FIG. 3 is a partial front view of the upper part of the cutting brush saw and a vector showing the angle and speed at which plants, hard particles, gravel and the like jump into the cutting blade during work.
【図4】刈払用チップソーの上部分の正面図である。FIG. 4 is a front view of the upper part of the cutting brush tip saw.
【図5】刈払用チップソーの上部分の正面図である。FIG. 5 is a front view of an upper portion of a cutting brush saw.
【図6】刈払用チップソーの上部分の正面図である。FIG. 6 is a front view of the upper portion of the cutting brush saw.
【図7】(a)は切刃に作用する草木及び硬質物の動き
を示した図であり、(b)は草木その他の硬質物の飛び
込み角や速度をベクトルで示したものである。FIG. 7 (a) is a diagram showing movements of plants and hard objects acting on the cutting edge, and FIG. 7 (b) is a vector showing plunge angles and velocities of plants and other hard objects.
【図8】両面使用の刈払用チップソーの部分正面図であ
る。FIG. 8 is a partial front view of a cutting saw for double-sided use.
【符号の説明】 〔1〕 …………刃体(デスク) 〔2〕 …………防御凸部 〔3〕 …………切刃部 〔4〕、〔4’〕……切刃(防御部切刃) 〔5〕 …………切刃(防御部切刃) 〔6〕、〔6’〕……超硬チップ 〔7〕、〔7’)……切刃 〔8〕 …………切刃[Explanation of Codes] [1] ………… Blade (desk) [2] ………… Defensive convex part [3] ………… Cutting edge part [4], [4 '] …… Cutting edge ( Protective part cutting edge [5] ………… Cutting edge (defense part cutting edge) [6], [6 '] …… Carbide tip [7], [7') …… Cutting edge [8] …… ...... Cutting edge
Claims (5)
最尖端の半径付近に切刃(4),(4’)切刃(5)の
最尖端を保持せしめた防御凸部(2)をチップソー
(1)の円周上の各チップの前部に設置し、この防御凸
部(2)の両側縁及び両側縁をつなぐ外周部の何れかに
適宜に切刃(4),(4’),(5)を設置したことを
特徴とする刈払用チップソー。1. A defense projection (2) in which the tip of a cutting blade (4), (4 ') cutting blade (5) is held near the radius of the tip of the tip (6) in a tip saw (1). ) Is installed at the front of each tip on the circumference of the tip saw (1), and the cutting blades (4), ( 4 ') and (5) are installed, and a cutting saw tip.
を熔着した凸部間に切刃(7),(8)を設置した切刃
部(3)を設けたことを特徴とする請求項1記載の刈払
用チップソー。2. A tip (6) in a tip saw (1).
The cutting blade saw according to claim 1, further comprising a cutting blade portion (3) having cutting blades (7) and (8) provided between the convex portions welded to each other.
を熔着した凸部間に三角形状の切刃を有する鋸刃を適当
数互いに相対して設置したことを特徴とする請求項1記
載の刈払用チップソー。3. A tip (6) in a tip saw (1).
The cutting saw according to claim 1, wherein an appropriate number of saw blades each having a triangular cutting edge are installed between the convex portions welded with each other so as to face each other.
に切刃(4),(5)を有する防御凸部(2)を設置
し、これを互いに反対方向に向け左右一体となして円周
上に適当数配設した事を特徴とする請求項1記載の刈払
用チップソー。4. In a tip saw, a protective convex portion (2) having cutting blades (4), (5) is provided on the front surface of a tip (6), and these are directed in opposite directions to form a left-right united body. The cutting saw according to claim 1, wherein an appropriate number of blades are arranged on the circumference.
に切刃(4),(5)を有する防御凸部(2)を設置
し、これを連続して円囲全域に適当数配設した事を特徴
とする請求項1記載の刈払用チップソー。5. In a tip saw, a protective convex portion (2) having cutting blades (4) and (5) is provided on the front surface of a tip (6), and an appropriate number of the convex convex portions (2) are arranged in the entire circle. The cutting saw according to claim 1, which is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6193794A JPH07227124A (en) | 1994-02-20 | 1994-02-20 | Tip saw for bush and grass clearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6193794A JPH07227124A (en) | 1994-02-20 | 1994-02-20 | Tip saw for bush and grass clearing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07227124A true JPH07227124A (en) | 1995-08-29 |
Family
ID=13185601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6193794A Pending JPH07227124A (en) | 1994-02-20 | 1994-02-20 | Tip saw for bush and grass clearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07227124A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008125503A (en) * | 2006-11-17 | 2008-06-05 | Trigger:Kk | Tip saw for bush clearing |
JP4471400B1 (en) * | 2008-11-17 | 2010-06-02 | ミナミ建設株式会社 | Rotating blade and method of using the rotating blade |
-
1994
- 1994-02-20 JP JP6193794A patent/JPH07227124A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008125503A (en) * | 2006-11-17 | 2008-06-05 | Trigger:Kk | Tip saw for bush clearing |
JP4471400B1 (en) * | 2008-11-17 | 2010-06-02 | ミナミ建設株式会社 | Rotating blade and method of using the rotating blade |
JP2010119315A (en) * | 2008-11-17 | 2010-06-03 | Minami Kensetsu Kk | Rotary blade and method for using rotary blade |
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