JPH0679527B2 - Circular saw blade - Google Patents
Circular saw bladeInfo
- Publication number
- JPH0679527B2 JPH0679527B2 JP23449590A JP23449590A JPH0679527B2 JP H0679527 B2 JPH0679527 B2 JP H0679527B2 JP 23449590 A JP23449590 A JP 23449590A JP 23449590 A JP23449590 A JP 23449590A JP H0679527 B2 JPH0679527 B2 JP H0679527B2
- Authority
- JP
- Japan
- Prior art keywords
- outer edge
- saw blade
- edge portion
- circular saw
- polishing
- 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 - Fee Related
Links
Landscapes
- Harvester Elements (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、モータおよびエンジン等の駆動源で回転駆動
され、雑草、下草、灌木等を刈取る刈払い機等に使用さ
れる新規な丸鋸刃に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used for a brush cutter or the like that is rotatively driven by a drive source such as a motor and an engine, and mows weeds, undergrowth, shrubs and the like. The present invention relates to a new circular saw blade.
（従来の技術） 一般に、刈払い機等に使用される丸鋸刃は、例えばSK5
等の炭素工具鋼で形成された円形平板状鋸母材の外周
に、複数個の歯を等間隔に備えている。しかも、この各
歯には所定の逃げ角を有する外縁部が設けられ、内側に
設けられた掬い角と共に歯先部を形成している。(Prior Art) Generally, a circular saw blade used for a brush cutter or the like is, for example, SK5.
A plurality of teeth are provided at equal intervals on the outer periphery of a circular flat plate-shaped saw base material formed of carbon tool steel such as. Moreover, each tooth is provided with an outer edge portion having a predetermined clearance angle, and forms a tooth tip portion together with the scooping angle provided inside.
（発明が解決しようとする課題） ところで、上述の丸鋸刃は鋸身（鋸母材）の外周に設け
られた複数個の歯を等間隔に備え、各歯には所定の逃げ
角を有する外縁部が形成されていた。従って、再研磨の
際に外縁部の研磨幅が大きくなり、複数個の歯を研磨す
る再研磨時間が掛り過ぎるという問題があった。この研
磨時間を短縮することは重要な課題であった。(Problems to be Solved by the Invention) By the way, the circular saw blade described above is provided with a plurality of teeth provided on the outer periphery of the saw blade (saw base material) at equal intervals, and each tooth has a predetermined clearance angle. The outer edge was formed. Therefore, when re-polishing, the polishing width of the outer edge portion becomes large, and there is a problem that the re-polishing time for polishing a plurality of teeth is too long. Shortening this polishing time has been an important issue.
本発明の目的は。上記の問題点を解決するために、外縁
部の研磨幅が短縮され、再研磨時間が短縮され、作業能
率が向上する丸鋸刃を提供することにある。The purpose of the present invention is. In order to solve the above problems, it is an object of the present invention to provide a circular saw blade in which the polishing width of the outer edge portion is shortened, the re-polishing time is shortened, and the work efficiency is improved.
［発明の構成］ （課題を解決するための手段） 上記目的を達成するために、本発明は、円形平板状鋸母
材の外周に所定の逃げ角を有する外縁部を設けた複数個
の歯が等間隔に設けられ、前記歯の歯先部を研磨するべ
く前記鋸母材に設けられた研磨治具取付穴から前記外縁
部までの距離に対して数mm程度短縮された距離で前記外
縁部の後方部を縮小して設けられた段差部を備えたこと
を特徴とする丸鋸刃である。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a plurality of teeth provided with an outer edge portion having a predetermined clearance angle on the outer periphery of a circular flat plate-shaped saw base material. Are provided at equal intervals, and the outer edge is shortened by about a few mm with respect to the distance from the polishing jig mounting hole provided in the saw base material to the outer edge portion to polish the tip portion of the tooth. The circular saw blade is characterized by including a stepped portion provided by reducing the rear portion of the portion.
（作用） 本発明の丸鋸刃を採用することにより、円形平板状鋸母
材の外周に所定の逃げ角を有する外縁部を形成する複数
個の歯が等間隔に設けられ、前記歯の歯先部を研磨する
べく前記鋸母材に設けられた研磨治具取付穴ら前記外縁
部までの距離に対して数mm程度短縮された距離で前記外
縁部の後方部を縮小して段差部を設けることによって、
外縁部の研磨幅が短縮され、再研磨時間が短縮され、作
業能率が向上すると共に、切断作業の際の食い込みが適
宜制御され、歯先部に対するバックアップ機能を備えて
いる。(Operation) By adopting the circular saw blade of the present invention, a plurality of teeth forming an outer edge portion having a predetermined clearance angle are provided on the outer periphery of the circular flat plate-shaped saw base material at equal intervals, and the teeth of the teeth are provided. The rear portion of the outer edge portion is reduced by a distance reduced by about several mm from the distance from the polishing jig mounting hole provided in the saw base material to the outer edge portion to polish the tip portion to form the step portion. By providing
The polishing width of the outer edge portion is shortened, the re-polishing time is shortened, the work efficiency is improved, the biting at the time of cutting work is appropriately controlled, and the tooth tip has a backup function.
（実施例） 以下、本発明の実施例を図面に基づいて、詳細に説明す
る。(Example) Hereinafter, the Example of this invention is described in detail based on drawing.
第１図は本発明の丸鋸刃における一実施例の概要構成
図、第２図は第１図の平面図を示す。図において丸鋸刃
１は、例えばSKS5またはSKS6等の炭素工具鋼からなる円
形平板状の鋸母材３の外周に等間隔に配置された複数
個、本実施例では12個の歯５とから構成されている。各
歯５には、掬い面13と外縁部15とからなる歯先部11およ
び段差部17とが形成されている。FIG. 1 is a schematic configuration diagram of an embodiment of a circular saw blade of the present invention, and FIG. 2 is a plan view of FIG. In the figure, the circular saw blades 1 are composed of a plurality of circular saw blades 1 made of carbon tool steel such as SKS5 or SKS6 and 12 teeth 5 in this embodiment, which are arranged at equal intervals on the outer periphery of a circular plate-shaped saw base material 3. It is configured. Each tooth 5 is provided with a tooth tip 11 including a scooping surface 13 and an outer edge portion 15 and a step portion 17.
前記鋸母材３の軸心部には、中心Soから半径ｒの取付穴
７からなる丸鋸刃取付部９が形成されている。この取付
穴７には、モータまたはエンジン等の駆動源により回転
駆動される図示されない駆動軸が装着される。従って、
この取付け部９の穴７に駆動軸が装着され、駆動軸が回
転されることにより、丸鋸刃１は矢印方向Ｐの反時計方
向に回転される。A circular saw blade mounting portion 9 including a mounting hole 7 having a radius r from the center So is formed at the axial center of the saw base material 3. A drive shaft (not shown) which is rotationally driven by a drive source such as a motor or an engine is mounted in the mounting hole 7. Therefore,
The drive shaft is mounted in the hole 7 of the mounting portion 9, and the drive shaft is rotated, whereby the circular saw blade 1 is rotated counterclockwise in the arrow P direction.
歯５に対応して鋸母材３における各歯側寄りに複数個、
本実施例では歯５の数と同数12個の研磨治具取付穴19が
設けられている。すなわち、丸鋸刃取付部９における取
付穴７の中心Soから半径Roの円周部上に各歯５に対応し
た各治具用取付穴19が配置されている。Corresponding to the teeth 5, a plurality of teeth are provided on the saw base material 3 toward each tooth side,
In this embodiment, 12 polishing jig mounting holes 19 are provided, which is the same as the number of teeth 5. That is, the jig mounting holes 19 corresponding to the teeth 5 are arranged on the circumference of the circular saw blade mounting portion 9 with the radius Ro from the center So of the mounting hole 7.
このような各取付穴19が設けられたことにより、各歯５
からひび割れが生じた際に、このひび割れがこの取付穴
19で受けられため、歯欠けが生じず、飛散することから
防止されている。それ故に、切断加工の作業面での安全
性が保持される。また、各歯５の歯先部11が摩耗した際
には、摩耗した歯先部11に対応した取付穴19に研磨治具
を装着し、丸鋸刃１を揺動せしめることにより、各歯先
部11の研磨を容易に実施することができ、この研磨によ
り外縁部15に所定の逃げ角β（例えば20度程度）を設け
ることができる。By providing each mounting hole 19 as described above, each tooth 5
When a crack is generated from the
Since it is received at 19, there is no tooth chipping and it is prevented from scattering. Therefore, the safety of the cutting work is maintained. When the tooth tip 11 of each tooth 5 is worn, a polishing jig is attached to the mounting hole 19 corresponding to the worn tooth tip 11, and the circular saw blade 1 is swung to move each tooth. The front portion 11 can be easily polished, and the outer edge portion 15 can be provided with a predetermined clearance angle β (for example, about 20 degrees) by this polishing.
段差部17は、この研磨治具取付穴19の中心S1から外縁部
15までの距離（半径）r1に対して、段差部17までの距離
（半径）r2を数mm、本実施例では2mm〜5mm程度短縮し
て、かつ外縁部15の後方長さを縮小して段差16を形成す
るものである。この外縁部15と段差部17との間の数mmの
段差16は、歯先部11の研磨の繰り返しにより次第に減少
するが、外縁部15を基準にして、段差部17を規定の段差
に再研磨することによって形成し、段差部17の機能を保
持することができる。The step portion 17 is an outer edge portion from the center S1 of the polishing jig mounting hole 19.
With respect to the distance (radius) r1 up to 15, the distance (radius) r2 up to the step portion 17 is reduced by several mm, in this embodiment, about 2 mm to 5 mm, and the rear length of the outer edge portion 15 is reduced. The step 16 is formed. The step difference 16 of several mm between the outer edge portion 15 and the step portion 17 gradually decreases due to repeated grinding of the tooth tip 11, but the step portion 17 is re-set to the prescribed step with reference to the outer edge portion 15. It can be formed by polishing, and the function of the step portion 17 can be maintained.
また、外縁部15の歯先部11からの長さ１は、丸鋸刃１の
外径の大きさおよび歯数により適宜に選定されるも、本
実施例では20mm程度とし、掬い面13の掬い角αは本実施
例では40度程度に選定されている。Further, the length 1 of the outer edge portion 15 from the tooth tip portion 11 is appropriately selected depending on the size of the outer diameter of the circular saw blade 1 and the number of teeth, but in this embodiment, it is set to about 20 mm and the scooping surface 13 The scooping angle α is selected to be about 40 degrees in this embodiment.
従って、このような段差部17が設けられたことにより、
歯先部11の強度を損うことなく、再研磨する際に、外縁
部15の研磨長さが１に短縮されて、研磨時間が短縮さ
れ、研磨能率が向上されると共に、雑草等の切断作業の
際の雑草の食込みが適宜制御され、歯先部11のバックア
ップ機能が向上し、従来の丸鋸刃に比較して被切削性が
良好で、切れ味良く、作業能率が向上する。Therefore, by providing such a step portion 17,
When re-polishing without reducing the strength of the tooth tip 11, the polishing length of the outer edge portion 15 is shortened to 1, the polishing time is shortened, the polishing efficiency is improved, and cutting of weeds etc. is performed. Eating of weeds during work is appropriately controlled, the backup function of the tooth tip 11 is improved, the machinability is good, the cutting is good, and the work efficiency is improved as compared with the conventional circular saw blade.
また、各歯５の歯先部11には、焼入れ熱処理が施されて
いる。図に示す斜線のように歯先部11に例えばレーザ、
高周波等で高温熱処理（焼入れ処理）を行うことによ
り、歯先部11の硬度をロックウエルＣ硬度（RC）で、例
えば58〜60程度に堅くして、歯先部11の摩耗が防止され
ている。Further, the tip 11 of each tooth 5 is subjected to quenching heat treatment. For example, a laser on the tip 11 as shown by the diagonal lines in the figure,
By performing high-temperature heat treatment (quenching treatment) with high frequency or the like, the hardness of the tooth tip portion 11 is increased to Rockwell C hardness (RC), for example, about 58 to 60, and wear of the tooth tip portion 11 is prevented. .
なお、本発明は、上記実施例に限定されるべきものでは
なく、適宜の設計的変更を行うことにより、他の態様に
おいても実施することが可能である。It should be noted that the present invention should not be limited to the above-described embodiments, but can be implemented in other aspects by making appropriate design changes.
上記の説明ですでに明らかなように、本発明の丸鋸刃
は、円形平板状鋸母材の外周に所定の逃げ角を有する外
縁部を設けた複数個の歯が等間隔に設けられ、前記鋸母
材に設けられた研磨治具取付穴から前記外縁部までの距
離に対して数mm程度短縮された距離で前記外縁部の後方
部を縮小して段差部を設けることによって、従来技術の
問題点が有効に解決され、従来の丸鋸刃に比較して被切
削性が良好で、切れ味が向上し、外縁部の研磨幅が短縮
され、再研磨時間が短縮され、作業能率が向上すると共
に、雑草等の切断作業の際の雑草の食込みが制御され、
歯先部のバックアップ機能が向上する等の効果を奏す
る。As is already clear from the above description, the circular saw blade of the present invention is provided with a plurality of teeth provided with an outer edge portion having a predetermined clearance angle on the outer periphery of the circular flat plate-shaped saw base material at equal intervals, By providing a stepped portion by reducing the rear portion of the outer edge portion at a distance shortened by several mm with respect to the distance from the polishing jig mounting hole provided in the saw base material to the outer edge portion, The problem of is effectively solved, the machinability is better than the conventional circular saw blade, the sharpness is improved, the outer edge polishing width is shortened, the re-polishing time is shortened, and the work efficiency is improved. In addition, the weeds are controlled when weeding is cut,
This has the effect of improving the backup function of the tooth tip.
第１図は本発明の丸鋸刃における一実施例の概要構成
図、第２図は第１図の平面図である。 １……丸鋸刃、３……鋸母材 ５……歯、７……取付穴 ９……丸鋸刃取付部、11……歯先部 15……外縁部、17……段差部 19……研磨治具取付穴FIG. 1 is a schematic configuration diagram of an embodiment of a circular saw blade of the present invention, and FIG. 2 is a plan view of FIG. 1 …… Round saw blade, 3 …… Saw base material 5 …… Tooth, 7 …… Mounting hole 9 …… Round saw blade mounting part, 11 …… Tooth tip part 15 …… Outer edge part, 17 …… Step part 19 ...... Polishing jig mounting hole
Claims (1)
有する外縁部を設けた複数個の歯が等間隔に設けられ、
前記歯の歯先部を研磨するべく前記鋸母材に設けられた
研磨治具取付穴から前記外縁部までの距離に対して数mm
程度短縮された距離で前記外縁部の後方部を縮小して設
けられた段差部を備えたことを特徴とする丸鋸刃。1. A plurality of teeth, each having an outer edge portion having a predetermined clearance angle, are provided on an outer periphery of a circular flat plate-shaped saw base material at equal intervals,
A few mm with respect to the distance from the polishing jig mounting hole provided in the saw base material to polish the tooth tip portion to the outer edge portion
A circular saw blade comprising a step portion provided by reducing a rear portion of the outer edge portion by a distance shortened to some extent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23449590A JPH0679527B2 (en) | 1990-09-06 | 1990-09-06 | Circular saw blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23449590A JPH0679527B2 (en) | 1990-09-06 | 1990-09-06 | Circular saw blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04117214A JPH04117214A (en) | 1992-04-17 |
| JPH0679527B2 true JPH0679527B2 (en) | 1994-10-12 |
Family
ID=16971925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23449590A Expired - Fee Related JPH0679527B2 (en) | 1990-09-06 | 1990-09-06 | Circular saw blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679527B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5718561B2 (en) * | 2009-10-20 | 2015-05-13 | 総吉 柳沢 | Mower for brush cutter |
-
1990
- 1990-09-06 JP JP23449590A patent/JPH0679527B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04117214A (en) | 1992-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |