JPH06143029A

JPH06143029A - Endless saw

Info

Publication number: JPH06143029A
Application number: JP25016091A
Authority: JP
Inventors: Susumu Ueno; 進上野
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-26
Filing date: 1991-06-26
Publication date: 1994-05-24

Abstract

PURPOSE:To form a sawtooth part externally in the radial direction on the same surface or in the same layer, and to reduce a resistance value for curving the body of an endless saw, for which the saw body is formed on the inside, when the shape of the cross section of the saw body is protruded. CONSTITUTION:A plurality of cut parts B1a, for which cutting is done from the inside to the outside in the radial direction, are formed throughout the entire circumference of a saw body 2B, or a plurality of cut parts B2, for which cutting is done from the outside to the inside in the radial direction, are formed throughout the entire circumference of the saw body 2B, or a plurality of both of the cut parts B1a and the cut parts B2 are formed throughout the entire circumference of the saw body 2B.

Description

【発明の詳細な説明】（産業上の利用分野）本発明は、同一面上あるいは同一
層内における放射方向の外方に鋸歯部を形成し、内方に
鋸身を形成させ、鋸身が鎖状ではなく一本の形状である
リング状、無端の鋸に関する。（発明が解決しようとする課題）第１、２図は、本発明
の無端の鋸を構成要素の一つとする鋸機の、使用用途を
携帯用とする場合の１実施例を示す。以下、この携帯用
鋸機の構成の概略を説明することによって、本発明の無
端の鋸の外形と、必要とされる機能を明らかにする。他
の構成要素が配置、あるいは取付けられて基体としての
役割を担うフレーム体は、下方を開放させた頭部の継っ
た門型の形状である。この実施例では、携帯用として、
そのフレーム体の前脚柱部と後脚柱部の頭部を継ぐ部分
を、手で握るのに適当な太さに形成して、把手部として
いる。無端の鋸は、同一面上あるいは同一層内における
放射方向の外方に鋸歯部を形成し、内方に鋸身を形成さ
せ、鋸身が全周にわたって鎖状ではなく一本の形状であ
り、そして本発明の無端の鋸は、鋸身の横断面の形状
を、凹凸いずれかのうち、多少変形していても、全体と
して凸形状に分類される形状の場合に限る。無端の鋸を
懸架する懸架プーリは、フレーム体を前後方向に縦断す
る同一立面上あるいは同一立層内における前、後脚柱部
の上部と下部のそれぞれに計４個配置されている。後脚
柱部の内部に電動モータが収納され、電動モータと連結
する後脚柱部の上部に配置した懸架プーリの回転によっ
て、無端の鋸は懸架プーリ間と懸架プーリ上を循環回動
する。無端の鋸に緊張を与える緊張機構は、前脚柱部の
上部に配置された懸架プーリと蝶頭付ネジ軸と送りナッ
ト等によって構成されている。切断作用は、切断作用線
域である前、後脚柱部の下端部間に露出した無端の鋸の
走行によって行なわれ、その切断作用線域に露出した無
端の鋸の上方には、板面を垂直に立てた姿勢で、板厚が
無端の鋸の鋸歯幅と同一か、もしくはより薄く、両端が
前、後脚柱部の下部に接合する案内板（ガイド・バー）
が設置される。この案内板の役割は、切断作用線域で走
行する無端の鋸の、切断抵抗による上方への逃げ、左右
横方向への振れを制止することにあり、そのために、そ
の下端部を無端の鋸の鋸身および鋸歯部の一部と嵌合す
る形状、すなわち、無端の鋸の鋸身の横断面の形状が凹
形状なら、その横断面の形状を凸形状に形成され、本発
明の無端の鋸のように、鋸身の横断面の形状が凸形状な
ら、その横断面の形状を凹形状に形成される。第３、
４、図は、本発明の無端の鋸と案内板の嵌合の形態の１
例を示す。そして、この実施例では、切断作用線域に露
出した無端の鋸の左側方に、板面を上下に向けた板状の
ベースを配置し、板状のベースとフレーム体の間に、案
内立軸、摺動スリーブ、２本のリンク、ネジリコイルバ
ネ等によって構成される昇降案内機構が介設され、板状
のベース下面が被切断材の上面に接して機体が被切断材
上に載置されて後、フレーム体の把手部を手動で下方へ
押圧して切断作業が開始されることによる、フレーム
体、懸架プーリ、電動モータ、緊張機構、無端の鋸等か
らなる上下可動部の降下と、切断作業終了後、再び上下
可動部が元の位置に復帰するための上昇を案内運動して
いる。携帯用として、本発明の無端の鋸を構成要素の一
つとする鋸機は上記のように構成されるが、この鋸機に
おける無端の端の態様をより実際に即して説明すると、
無端の鋸の緊張は、駆動用と設定された懸架プーリの回
転を正確に伝達するためと、無端の鋸が切断抵抗に抗し
て切断作用を行うために、かなりの程度、強く与えられ
る。強く緊張を与えられた無端の鋸は、高速で懸架プー
リ間を直線走行し、懸架プーリ上を曲線回動して循環回
動する。無端の鋸が懸架プーリ間と懸架プーリ上で折曲
する方向は、鋸歯の歯先から鋸身の頂部に抜ける方向で
ある。つまり、無端の鋸は、懸架プーリ間で鋸身を縦方
向に直線状に折曲する直線走行と、懸架プーリ上で鋸身
を縦方向に懸架プーリの外周の曲率にならった曲線状に
折曲する曲線回動を、強く緊張を与えられた状態の、高
速下で反複運動する。このような条件下で、無端の鋸が
その役割を全うするには、直接切断作用を担う鋸歯部は
別として、まず、鋸身自身に、懸架プーリ間で直線状に
折曲するための曲げと、懸架プーリ上で曲線状に折曲す
るための曲げに対して、柔軟に折曲するべく、曲げ抵抗
を極力、低減する必要がある。この鋸身の曲げの抵抗を
低減するには、鋸身を形成する材料が同一のものなら、
横断面の面積を少なくして鋸身を細くすれば良い。実際
に、この無端の鋸は、鋸身を細くし、その細い鋸身にな
らって小さい鋸歯を形成すると、より平滑な切断加工面
と精密な寸法切断を可能とする。しかし、案内板がその
役割を果すのに必要とする剛性が、案内板の板厚と、そ
の板厚と同一か、もしくはより幅広く形成される無端の
鋸の鋸歯幅を一定に規定し、また、鋸歯部を支持する土
台としての剛性と、案内板との嵌合の形態が切断作用時
の切断抵抗等によって容易に逸脱しないように、案内板
の下端部と横断面上で分け合う一定の面積が、鋸身（２
Ｂ）に一定以上の体積を必要とする。本発明は、上記の
ごとく、案内板との関係を適正に保ち、かつ鋸歯部を支
持する土台としての剛性を有するための体積を備えた上
で、無端の鋸が直線状および曲線状に柔軟に折曲するべ
く、鋸身の曲げの抵抗の値を低減することを目的とす
る。（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、鋸身の全周にわたって、切込み方向を鋸
身の頂部から放射方向の外方の方向、つまり放射方向の
内方から外方に、鋸身の両側面に通ずる方向で、鋸身の
背面と背面に続く鋸身の両側面の計３面に開口する、切
込み深さが鋸身の背の高さ未満の、周回方向の距離
（幅）が１００ｍｍ以下である切除部分（Ｂ１）を間隔
を置いて複数個形成するか、または切込み方向を鋸歯と
鋸歯の間の谷から放射方向の内方の方向、つまり、放射
方向の外方から内方向に、鋸身の両側面に通ずる方向
で、鋸身の放射方向の外方に向いた面と、放射方向の外
方に向いた面に続く鋸身の両側面の計３面に開口する、
切込み深さが鋸身の背の高さ未満の、周回方向の距離
（幅）が７０ｍｍ以下である切除部分（Ｂ２）を間隔を
置いて複数個形成するか、または切除部分（Ｂ１）およ
び切除部分（Ｂ２）の双方を間隔を置いて複数個形成す
る。この切込み方向を放射方向の内方から外方とする切
除部分（Ｂ１）および切込み方向を放射方向の外方から
内方とする切除部分（Ｂ２）の形状は、上記の設定の範
囲内で、その大小の相違を含めて多様な形状となって単
一的に特定されないが、切込み方向を放射方向の内方か
外方とする切除部分（Ｂ１）を、懸架プーリの外周に連
続する歯を形成する場合、その歯と噛み合う歯溝（Ｂ１
ｂ）に形成することができ、また、その切除部分（Ｂ
１）を、無端の鋸が、例えば、懸架プーリ間にあって直
線状の状態にあるとき、鋸身の背面の切り口から切込み
の先端部に向って、周回方向の距離（幅）を除々に縮小
したクサビ形状であって、無端の鋸が懸架プーリ上で曲
線状に折曲したとき、その周回方向に向き合う切込み
の両面が接近して閉じた形状となるスリット（Ｂ１ｃ）
に形成することができる。そして、その切込み方向を放
射方向の内方から外方とする切除部分（Ｂ１）を、無端
の鋸が周回方向に全体として、直線状の状態から曲げの
作用を受けない無作為の状態、曲げの作用を受けない無
作為の状態から懸架プーリの外周の曲率にならった曲線
状にいたる寸前の状態までの、いずれかの状態にあると
き、その周回方向の両端から真央部に向って除々に切込
みを深くし、その底面の形状が、懸架プーリの外周の曲
率と一致するか、もしくは近似する形状の切除部分（Ｂ
１ｊ）に形成し、また、その底面の形状が懸架プーリの
外周の曲率と一致するか、もしくは近似する形状の切除
部分（Ｂ１ｊ）を、無端の鋸の周回上に複数箇所形成さ
れた、部分的に直線状、もしくは部分的に直線状に近い
形状の部分、あるいは自律的に部分的に直線状、もしく
は直線状に近い状態になろうとする性質を与えた部分に
形成することができる。そして、前記クサビ形状のス
リット（Ｂ１ｃ）に方向を違えるものとして切込み方
向を放射方向の外方から内方とする切除部分（Ｂ２）
を、無端の鋸が懸架プーリ上で曲線状に折曲したとき、
切り口が開いたクサビ形状であって、無端の鋸が懸架プ
ーリ間で直線状に折曲したとき、周回方向に向き合う切
込みの両面が接近して閉じた形状となるスリ割形状のス
リット（Ｂ２ｂ）に形成することができ、また、切込み
方向を放射方向の内方から内方とする切除部分（Ｂ
１）、および切込み方向を放射方向の外方から内方とす
る切除部分（Ｂ２）の双方に共通する形状として、鋸身
の両側面に、円形、もしくは円形に類する形状で、その
全部、もしくは一部分を開口する円とう形状、もしくは
円とう形状に類する形状の切除部分（Ｂ１ｆ）、および
切除部分（Ｂ２ａ）がある。そして、切込み方向を放射
方向の内方から外方とする切除部分（Ｂ１）、および切
込み方向を放射方向の外方から内方とする切除部分（Ｂ
２）が、前記、スリット（Ｂ１ｃ）、（Ｂ２ｃ）のよう
に周回方向の距離（幅）が短かい場合は、その先端部
に、周回方向の距離（幅）が長い場合は、周回方向に向
き合う両端、ないし一端の隅角部に、円とう形状、もし
くは円とう形状に類する形状の緩衝孔（Ｂ３）が形成さ
れる。そして、切込み方向を放射方向の内方から外方と
する切除部分（Ｂ１）、および切込み方向を放射方向の
外方から内方とする切除部分（Ｂ２）と、それらの先端
部、あるいは隅角部に形成された緩衝孔（Ｂ３）に、鋸
身を形成する材料よりも曲げの抵抗の値の低い充填物
（Ｂ４）を充填することができる。この充填物（Ｂ４）
の充填は、切除部分（Ｂ１）および切除部分（Ｂ２）の
全てに適用するのではなく、例えば、無端の鋸が直線状
の状態にあるときはクサビ形状で、懸架プーリ上で曲線
状に折曲したとき、周回方向に向き合う切込みの両面が
ほぼ密着して閉じた形状となるスリット（Ｂ１ｃ）や、
無端の鋸が直線状の状態にあるとき、スリ割形状のスリ
ット（Ｂ２ｂ）の場合は、その充填が不可能となって除
外され、周回方向の距離〔幅〕が長く、鋸身を切取る空
間の体積が多量であって、案内板との嵌合の形態を維持
する上で障害となる場合は、充填する必要がある。充填
物（Ｂ４）の材料としては、合成樹脂、軟質の金属、多
孔質のセラミック等が用意される。そして、切込み方向
を放射方向の内方から外方とする切除部分（Ｂ１）、お
よび切込み方向を放射方向の外方から内方とする切除部
分（Ｂ２）と、その先端部、あるいは隅角部に形成され
た緩衝孔（Ｂ３）の、鋸身の両側面に通ずる方向の角度
を、鋸身の側面に対して斜めの角度とすることができ、
また、その斜めの角度とした切除部分（Ｂ１）、（Ｂ
２）の周回方向の距離（幅）が短い場合は、鋸身の周回
上の同一地点で交差するように２本形成しても良い。ま
た、切込み方向を放射方向の内方から外方とする切除部
分（Ｂ１）、および切込み方向を放射方向の外方から内
方とする切除部分（Ｂ２）の、その切込みの放射方向の
角度を、無端の鋸が直線状の状態にあるとき、その鋸身
の頂辺に対して、無端の鋸の走行方向の前方へ傾斜する
か、あるいは、後方へ傾斜した斜めの角度とすることが
できる。そして、切込み方向を放射方向の内方から外方
とする切除部分（Ｂ１）、および切込み方向を放射方向
の外方から内方とする切除部分（Ｂ２）の双方を、一本
の無端の鋸に同時に形成する場合は、放射方向の同一線
上に並列して、鋸身の差し渡しが極端に狭くならないよ
うに、周回方向に交互にずらして形成される。また、切
込み方向を放射方向の外方から内方とする切除部分（Ｂ
２）に隣接する２個の鋸歯、または一方の鋸歯を所定の
鋸歯よりも小さく形成するか、あるいは、その小さく形
成した鋸歯から順次、隣接する鋸歯を大きくしていき、
所定の鋸歯の大きさに到るように形成することができ
る。（作用）切込み方向を放射方向の内方から外方とする切
除部分（Ｂ１）は、無端の鋸が懸架プーリ間で直線状に
折曲したとき、その鋸身の曲げの中立面より放射方向の
内側に生じる引張り応力を、その鋸身を切取った空間の
体積を膨脹させて吸収し、無端の鋸が懸架プーリ上で外
周の曲率にそって曲線状に折曲したときその鋸身の曲
げの中立面より放射方向の内側に生じる圧縮応力を、そ
の鋸身を切取った空間の体積を収縮させて吸収する。切
込み方向を放射方向の外方から内方とする切除部分（Ｂ
２）は、無端の鋸が懸架プーリ間で直線状に折曲したと
き、その鋸身の曲げの中立面より放射方向の外側に生じ
る圧縮応力を、その鋸身を切取った空間の体積を収縮さ
せて吸収し、無端の鋸が懸架プーリ上で曲線状に折曲し
たとき、その鋸身の曲げの中立面より放射方向の外側に
生じる引張り応力を、その鋸身を切取った空間の体積を
膨脹させて吸収する。この切込み方向を放射方向の内方
から外方とする切除部分（Ｂ１）、および切込み方向を
放射方向の外方から内方とする切除部分（Ｂ２）の、そ
の空間の体積を膨張、収縮させて内部応力を吸収する割
合は、無端の鋸が懸架プーリ間で直線状に折曲するとき
は、折曲する角度が緩く、懸架プーリ上で曲線状に折曲
するときは、折曲する角度が急角度となる、その角度の
緩急に相応して、折曲する角度が緩く、生じる内部応力
が小さい場合は、その割合を少なくし、折曲する角度が
急角度で生じる内部応力が大きい場台は、その割合を多
くし、無端の鋸に残された曲げの抵抗の振幅を、折
曲する角度の緩急や曲げの圧力の大小に比較して、縮小
したものとする。切込み方向を放射方向の内方から外方
とする切除部分（Ｂ１）を、例えば、無端の鋸が曲げの
作用を受けない無作為の状態のとき、その両端から真央
部に向って除々に切込みを深くし、その底面の形状を懸
架プーリの外周の曲率と一致する切除部分（Ｂ１ｊ）と
すると、その切除部分（Ｂ１ｊ）を形成した部分は、懸
架プーリ間では直線状の曲げの作用を受けるが、懸架プ
ーリ上での曲線状の曲げの作用は受けず、懸架プーリ上
で生じる内部応力は消去される。無端の鋸の周回上に、
部分的に直線状の形状の部分を形成するか、あるいは、
部分的に直線状になろうとする性質を与えた部分を形成
し、その鋸身の部分に、切込み方向を放射方向の内方か
ら外方とし、その底面の形状が、懸架プーリの外周の曲
率と一致する形状の切除部分（Ｂ１ｊ）を形成すると、
その鋸身の部分は、懸架プ−リ間で直線状に折曲するた
めの曲げと、懸架プーリ上で曲線状に折曲するための曲
げの作用を受けず、全ての内部応力が消去される。切込
み方向を放射方向の内方から外方とする切除部分（Ｂ
１）、および切込み方向を放射方向の外方から内方とす
る切除部分（Ｂ２）の先端部、あるいは隅角部に形成さ
れた緩衝孔（Ｂ３）は、先端部および隅角部に局部的に
集中する曲げの応力をその周囲に分散し、また、曲げの
応力を分散することによって、切除部分（Ｂ１）、（Ｂ
２）の空間の体積の膨脹、収縮を促進する切込み方向を
放射方向の内方から外方とする切除部分（Ｂ１）、およ
び切込み方向を放射方向の外方から内方とする切除部分
（Ｂ２）と、その先端部、あるいは隅角部に形成された
緩衝孔（Ｂ３）に充填された充填物（Ｂ４）は、切除部
分（Ｂ１）、（Ｂ２）が鋸身を切取る空間の体積が大き
く、案内板との嵌合の形態を維持するための体積が不足
した場合の、その体積を補充する。切込み方向を放射方
向の内方から外方とする切除部分（Ｂ１）、および切込
み方向を放射方向の外方から内方とする切除部分（Ｂ
２）を、とくに、周回方向の距離（幅）を短かくして形
成する場合、鋸身の背面と、放射方向の外方に向いた面
のそれぞれに切り口となって表われる、鋸身の両側面に
通ずる方向の角度を、鋸身の側面に対して直角の角度と
すると、無端の鋸が懸架プーリ上で折曲するとき、その
切除部分を頂点として多角形の形状に折曲する。これに
対して、鋸身の両側面に通ずる方向の角度を斜めの角度
とすると、その切除部分を間に挟んで、その部分の鋸身
の鋭角部分どうしが周回方向に立体的に体積を交換し合
い、その分断された鋸身の小部分の剛性が一定の割合で
接続し、鋸身の全周にわたって連結され、無端の鋸が懸
架プーリ上で折曲するとき、極端に多角形に折曲した形
状とならず、より円形に近い形状に折曲する。無端の鋸
は、無端の鋸以外の鋸と同様、被切断材の切断抵抗によ
って、鋸歯のスクイ面にそって引張り応力を生じ、鋸歯
の逃げ面にそって圧縮応力を生じる。このスクイ面およ
び逃げ面に生じた引張り応力と圧縮応力は、鋸歯のスク
イ面の角度がプラス角の場合、無端の鋸が直線状の状態
にあるときの鋸身の頂辺に対して、無端の鋸の走行方向
の後方に傾斜した角度で、互いに反対方向に、その大部
分が鋸歯と鋸歯の間の谷の底点に集中する。したがっ
て、鋸歯のスクイ面の角度がプラス角の場合、切込み方
向を放射方向の内方から外方とする切除部分（Ｂ１）
を、例えば、周回方向の距離〔幅〕を短かくしたスリッ
トとして形成する場合、その切込みの放射方向の角度
を、底点とは同一線上とはならない位置で、無端の鋸の
走行方向の後方に傾斜した角度に形成すると、その応力
の集中する底点から鋸身の頂辺までの走行方向の後方に
傾斜した角度の距離の全部と体積が確保され、切込みの
角度を直角および前方へ傾斜した角度とする場合に比し
て、無端の鋸の走行方向の切断抵抗に抗する方向の鋸身
の剛性を増加する。また、鋸歯のスクイ面の角度がプラ
ス角であって、切込み方向を放射方向の外方から内方と
する切除部分（Ｂ２）を、例えば、周回方向の距離
（幅）を短かくしたスリットとして形成する場合、その
切込みの放射方向の角度を、前記と同様に、無端の鋸の
走行方向の後方に傾斜した角度に形成すると、その切除
部分（Ｂ２）を形成した部分を除く部分の鋸身の、走行
方行の切断抵抗に抗する方向の剛性を増加する。そし
て、鋸歯のスクイ面の角度がマイナス角であって、切込
み方向を放射方向の内方から外方とする切除部分（Ｂ
１）、および切込み方向を放射方向の外方から内方とす
る切除部分（Ｂ２）を、例えば、周回方向の距離（幅）
を短かくしたスリットとして形成する場合、その切込み
の放射方向の角度を、無端の鋸の走行方向の前方に傾斜
した角度に形成すると、その鋸歯のスクイ面にそって生
じる引張り応力に抗する方向の鋸身の剛性を増加する。
切込み方向を放射方向の外方から内方とする切除部分
（Ｂ２）に隣接する鋸歯を所定の鋸歯よりも小さく形成
するか、あるいは、その小さく形成した鋸歯から順次、
隣接する鋸歯を大きくしていき、所定の鋸歯の大きさに
到るように形成すると、その鋸歯にかかる切断抵抗の割
合を少なくし、また、鋸歯を小さく形成した鋸身の部分
の、切断抵抗に対する負担を軽減する。（実施例）実施例について図面を参照して説明すると、
第６図に示す実施例は、切込み方向を放射方向の内方か
ら外方とし、鋸身の両側面に通ずる方向で、鋸身の背面
と背面に続く鋸身の両側面に開口する切除部分（Ｂ１）
を、周回方向の距離（幅）が鋸身の背面の切り口から先
端部にいたるまで同一寸法のほぼ鋸歯１／３個分のスリ
ット（Ｂ１ａ）に形成するもので、切込み深さが鋸身の
曲げの中立面に達し、先端部の底に半円形の丸味をつ
け、鋸歯３個分のピッチで鋸身の全周に形成している。
第７図に示す実施例は、懸架プーリ、とくに駆動用の懸
架プーリが歯付である場合に対応するもので、切込み方
向を放射方向の内方から外方とする切除部分（Ｂ１）
を、懸架プーリの外周に形成された歯と同一形状で同一
ピッチに、鋸身の全周に形成している。第８図に示す実
施例は、切込み方向を放射方向の内方から外方とする切
除部分（Ｂ１）を、無端の鋸が直線状の状態にあると
き、周回方向の距離（幅）が鋸身の背面の切り口から先
端部に向って除々に縮小したクサビ形状のスリット（Ｂ
１ｃ）とし、その先端部に鋸身の両側面に通ずる方向
で、鋸身の両側面に開口する円とう形状の緩衝孔（Ｂ
３）を形成し、そのクサビ形状のスリット（Ｂ１ｃ）と
緩衝孔（Ｂ３）の双方に、鋸身を形成する材料よりも曲
げの抵抗の値の低い充填物（Ｂ４）を充填している。第
９図に示す実施例は、切込み方向を放射方向の内方から
外方とする切除部分（Ｂ１ｄ）の周回方向の距離幅がほ
ぼ鋸歯４個分であり、その無端の鋸の走行方向の前方と
後方で向き合う両隅角部を丸味をつけた形状とし、内部
に充填物（Ｂ４）を充填している。第１０図に示す実施
例は、切込み方向を放射方向の内方から外方とする切除
部分（Ｂ１）を、周回方向の距離〔幅〕がほぼ鋸歯４個
分で、切込み深さを両端から真央部に向って除々に浅く
した切除部分（Ｂ１ｅ）とし、その両隅角部に鋸身の両
側面に通ずる方向で、鋸身の両側面に開口する円とう形
状の緩衝孔（Ｂ３）を形成し、内部に充填物を充填して
いる。第１１図に示す実施例は、切込み方向を放射方向
の内方から外方とし、鋸身の背面と背面に続く両側面に
開口する円とう形状の切除部分（Ｂ１ｆ）を、ほぼ鋸歯
４個分のピッチで鋸身の全周に形成している。第１２図
に示す実施例は、切込み方向を放射方向の外方から内方
とし、鋸身の両側面に通ずる方向で、鋸歯と鋸歯の間の
谷の底で、鋸身の放射方向の外方に向いた面と、放射方
向の外方に向いた面に続く両側面に開口する円とう形状
の切除部分（Ｂ２ａ）を、鋸歯３個を間に置いて鋸身の
全周に形成している。第１３図に示す実施例は、切込み
方向を放射方向の外方から内方とし、先端部に緩衝孔
（Ｂ３）を有する、無端の鋸が直線状の状態にあると
き、スリ割形状であるスリット（Ｂ２ｂ）を、鋸歯３個
を間に置いて鋸身の全周に形成している。第１４−Ｉ
図、第１４−ＩＩ図、第１４−ＩＩＩ図は、鋸身の背面
と鋸身の両側面の一部を放射方向の内方から外方に向っ
て視野に入れた図であり、切込み方向を放射方向の内方
から外方とする切除部分（Ｂ１）が、周回方向の距離
（幅）が短かい場合の、鋸身の背面に切り口となって表
われる、鋸身の両側面に通ずる方向の角度を示すもので
あって、第１４−Ｉ図と第１４−ＩＩ図に示す実施例
は、その角度を鋸身の側面に対して、それぞれ直角の角
度と斜めの角度とし、第１４−ＩＩＩ図に示す実施例
は、互いに反対の方向に斜めの角度とする切除部分（Ｂ
１）を周回上の同一地点で交差するよう２本形成してい
る。第１５図は鋸歯部と鋸身の放射方向の外方に向いた
面を、放射方向の外方から内方に向って視野に入れた図
であり、切込み方向を放射方向の外方から内方とする切
除部分（Ｂ２）が、周回方向の距離（幅）が短かい場合
の、鋸歯と鋸歯の間の谷の底の、鋸身の放射方向の外方
に向いた面に切り口となって表われる、鋸身の両側面に
通ずる方向の角度を示すものであって、この図に示す実
施例は、一本の無端の鋸における形状の相違する鋸歯、
および形状の相違する鋸歯の配列順序によって、その鋸
身の側面に対する角度を直角および斜めの角度としてい
る。第１６図に示す実施例は、無端の鋸の鋸歯のスクイ
面の角度がプラス角であり、切込み方向を放射方向の内
方か外方とするクサビ形状のスリット（Ｂ１ｇ）の、そ
の切込み方向の角度を、鋸身の背面の切り口を切込みの
先端部よりも無端の鋸の走行方向の後方に位置させ、走
行方向の後方に傾斜した斜めの角度としている。第１７
図に示す実施例は、無端の鋸の鋸歯のスクイ面の角度が
プラス角であり、切込み方向を放射方向の外方から内方
とするスリ割形状のスリット（Ｂ２ｃ）の、その切込み
方向の角度を、無端の鋸の走行方向の後方に傾斜した斜
めの角度とし、そのスリット（Ｂ２ｃ）の後方に隣接す
る鋸歯を所定の鋸歯よりも小さく形成している。第１
８、１９図に示す実施例は、無端の鋸の鋸歯のスクイ面
の角度がともにマイナス角であり、第１８図に示す実施
例は、切込み方向を放射方向の内方から外方とするクサ
ビ形状のスリット（Ｂ１ｈ）の、その切込み方向の角度
を、無端の鋸の走行方向の前方に傾斜した斜めの角度と
し、第１９図に示す実施例は、切込み方向を放射方向の
外方から内方とするスリ割形状のスリット（Ｂ２ｄ）
の、その切込み方向の角度を無端の鋸の走行方行の前方
に傾斜した斜めの角度とし、そのスリット（Ｂ２ｄ）の
前方に隣接する鋸歯を所定の鋸歯より小さく形成してい
る。第２０図に示す実施例は、切込み方向を放射方向の
内方から外方とするクサビ形状のスリット（Ｂ１ｃ）
と、切込み方向を放射方向の外方から内方とする円とう
形状の切除部分（Ｂ２ａ）を周回上に交互に配置し、鋸
身の全周に形成している。第２１図に示す実施例は、切
込み方向を放射方向の外方から内方とする円とう形状の
切除部分（Ｂ２ａ）を比較的長いピッチで形成し、その
円とう形状の切除部分（Ｂ２ａ）の間を部分的に直線状
の形状とし、その直線状とした鋸身の部分に、切込み方
向を放射方向の内方から外方とし、その部分の鋸身の頂
辺上の両端から真央部に向って除々に切込みを深くし、
その底面の形状が懸架プーリの外周の曲率と一致する切
除部分（Ｂ１ｊ）を形成している。（発明の効果）無端の鋸の鋸身に、切込み方向を放射方
向の内方から外方とする切除部分（Ｂ１）を複数個、ま
たは切込み方向を放射方向の外方から内方とする切除部
分（Ｂ２）を複数個、または切除部分（Ｂ１）、（Ｂ
２）の双方を複数個形成すると、無端の鋸の循環回動中
の内部応力が吸収されて曲げの抵抗の値が低減し、低減
された抵抗分に相当して、無端の鋸は柔軟に折曲し、円
滑に循環回動する。そして、残された曲げの抵抗の振幅
を縮小するという作用によって、無端の鋸により安定し
た循環回動を促す。切込み方向を放射方向の内方から外
方とする切除部分（Ｂ１）を、その両端から真央部に向
って除々に切込みを深くし、その底面の形状が、無端の
鋸が直線状の状態から曲げの作用を受けない無作為の状
態、曲げの作用を受けない無作為の状態から懸架プーリ
の外周の曲率にならった曲線状にいたる寸前の状態まで
の、いずれかの状態にあるとき、懸架プ−リの外周の曲
率と一致するか、もしくは近似する切除部分（Ｂ１ｊ）
とすると、その切除部分（Ｂ１ｊ）を形成した鋸身の部
分は、懸架プーリ上での曲げの作用をまったく受けない
か、もしくは少なくするため、その鋸身の部分に、鋸歯
部を支持するための剛性を余裕をもって与え、切断作用
の効率を向上することができる。また、無端の鋸の周回
上に、部分的に直線状、もしくは直線状に近い形状の部
分、あるいは部分的に直線状、もしくは直線状に近い状
態になろうとする性質を与えた部分に、切込み方向を放
射方向の内方から外方とし、その両端から真央部に向っ
て除々に切込みを深くし、その底面の形状が、懸架プー
リの外周の曲率と一致するか、もしくは近似する切除部
分（Ｂ１ｊ）を形成すると、その鋸身の部分は、循環回
動中に直線状、および曲線状の曲げの作用をまったく受
けないが、もしくは少なくするため、その鋸身の部分
に、鋸歯部を支持する土台としての剛性を余裕を持って
与え、切断作用の効率を向上させ、またそれが無端の鋸
を設計する上で有利な条件を導く。切込み方向を放射方
向の内方から外方とする切除部分（Ｂ１）、および切込
み方向を放射方向の外方から内方とする切除部分（Ｂ
２）の先端部、あるいは隅角部に緩衝孔（Ｂ３）を形成
すると、先端部および隅角部に局部的に集中する内部応
力によって引き起されるキレツの発生と、キレツの成長
による鋸身の破断が未然に防止され、また、切除部分
（Ｂ１）、（Ｂ２）の体積の膨張、収縮を促進する作用
によって、無端の鋸はより柔軟に折曲し円滑に循環回動
する。切込み方向を放射方向の内方から外方とする切除
部分（Ｂ１）、および切込み方向を放射方向の外方から
内方とする切除部分（Ｂ２）と、その先端部、もしくは
隅角部に形成された緩衝孔（Ｂ３）に充填物（Ｂ４）を
充填することによって、案内板との嵌合の形態を維持す
るための体積を補充して、案内板との関係を適正に保
ち、また、切除部分（Ｂ１）、（Ｂ２）および緩衝孔
（Ｂ３）への鋸屑等の進入、蓄積を排除することができ
る。切込み方向を放射方向の内方から外方とする切除部
分（Ｂ１）、および切込み方向を放射方向の外方から内
方とする切除部分（Ｂ２）を、とくに周回方向の距離
（幅）を短かくして形成する場合、その鋸身の両側面に
通ずる方向の角度を、鋸身の側面に対して斜めの角度と
すると、無端の鋸はより円形に近かい形状に折曲して懸
架プーリ上を円滑に曲線回動し、また、その切除部分
（Ｂ１）、（Ｂ２）を間に置いて切除部分間の剛性を接
続する作用によって、その弱体化した切除部分を形成し
た部分の鋸身の、切断抵抗による部分的な後屈や浮き上
りを、より低い程度に抑止する。切込み方向を放射方向
の内方から外方とする切除部分（Ｂ１）、および切込み
方向を放射方向の外方から内方とする切除部分（Ｂ２）
の、その切込み方回の角度を、無端の鋸が直線状の状態
にあるとき、鋸身の頂辺に対して斜めの角度とすると、
無端の鋸の走行方向の切断抵抗に抗する方向の鋸身の剛
性を増加することができ、切断作用の効率をより向上す
る。切込み方向を放射方向の外方から内方とする切除部
分（Ｂ２）に隣接する鋸歯を、所定の鋸歯よりも小さく
形成するか、あるいは、その小さく形成した鋸歯から順
次、隣接する鋸歯を大きくしていき、所定の鋸歯の大き
さに到るように形成すると、その切除部分（Ｂ２）を形
成した部分の鋸身の切断抵抗に対する負担を軽減し、切
断抵抗による部分的な曲がりをより低い程度に抑止す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application)
A sawtooth portion is formed on the outer side in the radial direction in the layer, and on the inner side
Form a saw blade, and the saw blade is a single shape instead of a chain
A ring-shaped, endless saw. (Problems to be Solved by the Invention) FIGS.
Use of a saw machine that has one of the endless saws
An embodiment in the case of being portable will be shown. Below, this portable
By explaining the outline of the construction of the saw machine,
Clarify the outline of the edge saw and the required function. other
The components of the
The frame body that plays a role is a continuation of the head that opens downward
It has a gate-like shape. In this embodiment, for portable use,
The part that joins the heads of the front and rear pillars of the frame
Is formed into a thickness that is suitable for grasping by hand, and used as a handle
There is. Endless saws on the same plane or in the same layer
A saw tooth is formed on the outside in the radial direction and a saw blade is formed on the inside.
However, the saw blade has a single shape instead of a chain around the entire circumference.
And the endless saw of the present invention has a cross-sectional shape of the saw blade.
If any of the unevenness is slightly deformed,
Only in the case of a shape classified into a convex shape. An endless saw
The suspension pulley that suspends vertically cuts the frame body in the longitudinal direction.
Front and rear pedestals on the same elevation or in the same floor
There are a total of four on each of the upper and lower parts. Hind legs
Electric motor is stored inside the pillar and connected to the electric motor
Rotation of the suspension pulley placed above the rear pedestal
The endless saw circulates between the suspension pulleys and on the suspension pulleys.
To do. The tension mechanism that gives tension to the endless saw is
The suspension pulley located on the top, the screw shaft with butterfly head, and the feed nut.
It is composed of Cutting action is the cutting action line
The area of the endless saw exposed between the lower ends of the front and rear pedestals
Exposed to the cutting action line area
Above the edge saw, the plate thickness is
The sawtooth width of an endless saw, or thinner,
Guide plates (guide bars) joined to the lower part of the front and rear pedestals
Is installed. The role of this guide plate is to run in the cutting action area.
The endless saw that runs, escapes upward due to cutting resistance, left and right
It is to restrain the lateral shake, and for that reason,
The lower end of the blade with the saw blade and part of the sawtooth
The shape of the saw blade of the endless saw is concave.
If it is a shape, its cross section is formed into a convex shape,
Like the endless saw of light, the cross section of the saw blade has a convex shape.
In addition, the shape of the cross section is formed into a concave shape. Third,
4, FIG. 1 shows one embodiment of the fitting of the endless saw and the guide plate of the present invention.
Here is an example: In this embodiment, the cutting action line area is exposed.
On the left side of the endless saw that came out, the plate shape with the plate surface facing up and down
Place the base, and place a plan between the plate-shaped base and the frame body.
Inner shaft, sliding sleeve, two links, torsion coil bar
An elevating and lowering guide mechanism composed of
The lower surface of the base contacts the upper surface of the material to be cut
After it is placed on the top, manually pull down the handle of the frame body.
Frame by pressing to start cutting work
Body, suspension pulley, electric motor, tensioning mechanism, endless saw, etc.
Of the vertically movable part, and again after the cutting work is completed.
Guide the upward movement for the movable part to return to its original position.
There is. One of the components of the endless saw of the present invention is for portable use.
The saw machine to be used is constructed as described above.
In more practical description of the aspect of the endless end in
The tension of the endless saw is due to the tension of the suspension pulley set to drive.
The endless saw resists the cutting resistance in order to transmit the rotation accurately.
To a great extent to exert a cutting action
It A strongly tensioned endless saw makes the suspension hook fast and fast.
It travels in a straight line between
Move. An endless saw bends between and over the suspension pulleys
The direction to do is to slip from the tip of the saw blade to the top of the saw blade.
is there. In other words, an endless saw has a saw blade vertically between the suspension pulleys.
Straight running that bends in a straight line to the direction and saw blade on the suspension pulley
To a curved line that follows the curvature of the outer circumference of the suspension pulley in the vertical direction.
The curved turning that bends makes it possible to
Anti-double motion under speed. Under these conditions, an endless saw
In order to fulfill its role, the sawtooth part that is responsible for the direct cutting action
Apart from that, first of all, straighten the saw blade itself between the suspension pulleys.
Bending to fold and curving on the suspension pulley
Bending resistance to flexibly bend for bending
Need to be reduced as much as possible. The bending resistance of this saw blade
To reduce, if the saw blade material is the same,
The cross-sectional area can be reduced to make the saw blade thinner. In fact
In addition, this endless saw makes the saw blade thin and becomes the thin saw blade.
By forming a small saw tooth, a smoother cut surface can be obtained.
It enables precise dimension cutting. However, the guide plate
The rigidity required to play a role depends on the thickness of the guide plate and its rigidity.
Endless with the same or wider width than
Saw blade width is fixed and the soil supporting the saw blade is
The rigidity of the table and the form of fitting with the guide plate are effective when cutting.
Guide plate not to easily deviate due to cutting resistance of the
The cross-section of the lower end of the saw has a certain area
B) requires a certain volume or more. The present invention is
As shown in the figure, maintain the proper relationship with the guide plate and support the sawtooth portion.
With a volume to have rigidity as a base to hold
The endless saw should flexibly bend straight and curved.
The purpose is to reduce the bending resistance of the saw blade.
It (Means for solving the problem) To achieve the above-mentioned object
In addition, the present invention saws the cutting direction along the entire circumference of the saw blade.
Radial outward from the top of the body, that is, radial
From inside to outside, in the direction leading to both sides of the saw blade,
Open on the back side and on both sides of the saw blade on the back side, a total of 3 sides,
Circumferential distance when the depth of penetration is less than the height of the saw blade
Interval between excised parts (B1) whose (width) is 100 mm or less
To form multiple pieces, or set the cutting direction to serrated
Radial inward from the valley between the saw teeth, that is, radial
Direction from the outside to the inside, leading to both sides of the saw blade
The surface of the saw blade facing outward in the radial direction and
Opening on a total of 3 sides on both sides of the saw blade that follows the side facing toward
Circumferential distance where the depth of cut is less than the height of the saw blade
Space the cutouts (B2) whose width is 70 mm or less.
Place a plurality of parts to place or cut out part (B1) and
And a plurality of cutout portions (B2) are formed at intervals.
It This cutting direction is from the inside to the outside in the radial direction.
Removed part (B1) and cutting direction from outside in radial direction
The shape of the incision (B2) to be inward is within the range of the above setting.
Within the enclosure, various shapes can be created, including differences in size.
It is not specified uniquely, but the cutting direction is inward of the radial direction.
Connect the outer cutout (B1) to the outer circumference of the suspension pulley.
When forming a continuous tooth, a tooth groove (B1
b), and the cut portion (B
1) Insert an endless saw directly between the suspension pulleys, for example
When in a linear state, make a cut from the back cut edge of the saw blade
The distance (width) in the orbiting direction is gradually reduced toward the tip of the
It has a wedge shape and an endless saw bends on the suspension pulley.
A notch that, when bent linearly, faces in the direction of its circumference
Slits (B1c) in which both sides are close and closed
Can be formed. Then release the cutting direction.
Endlessly cut away the part (B1) from the inside to the outside
The saw is bent in a straight line from the straight state as a whole.
Random state not affected, not affected by bending
A curve that follows the curvature of the outer circumference of the suspension pulley from the artificial state
If you are in any state, up to the state of just before
Gradually cut from both ends in the lap direction toward the center
And the shape of the bottom surface of the suspension pulley
The cut-out part (B
1j), and the shape of the bottom surface of the suspension pulley is
Excision of a shape that matches or approximates the curvature of the circumference
Form multiple parts (B1j) on the circumference of an endless saw.
Partially straight, or partially straight
Part of the shape, or partially linear or autonomous
Is the part that gives the property of trying to get a state close to a straight line
Can be formed. And the wedge-shaped strip
How to cut as lit (B1c) with different direction
Excision part (B2) whose direction is from the outside to the inside in the radial direction
When an endless saw bends in a curved line on the suspension pulley,
It has a wedge shape with an open cut and an endless saw
When bending in a straight line between
A slit-shaped slit that is closed on both sides
Can be formed on the lit (B2b), and can also be cut
The cut-out part (B
1), and the cutting direction is from the outside to the inside in the radial direction
The shape common to both cutouts (B2)
On both sides of the, in the shape of a circle or a circle,
A circular conical shape that opens all or part, or
A cut-out portion (B1f) having a shape similar to a conical shape, and
There is a cutout portion (B2a). And radiate the cutting direction
Cutting part (B1) from inside to outside of the direction, and cutting
The cut-out part (B
2) is like the slits (B1c) and (B2c)
If the distance (width) in the orbiting direction is short, the tip
If the distance (width) in the orbiting direction is long,
Conical shape on both ends or corners of one end
A buffer hole (B3) with a shape similar to a circular cone is formed.
Be done. Then, the cutting direction is changed from the inner side to the outer side in the radial direction.
The cut portion (B1) to be cut, and the cutting direction of the radial direction
Excisions (B2) from the outside to the inside and their tips
Part, or the buffer hole (B3) formed in the corner,
Fillers with a lower resistance to bending than the body-forming material
(B4) can be filled. This filling (B4)
The filling of the cut portion (B1) and the cut portion (B2)
Not applicable to all, eg endless saws are straight
Is wedge-shaped when
When bent into a circle, both sides of the notches facing
A slit (B1c) that is almost in close contact and has a closed shape,
When the endless saw is straight, the slit-shaped slit
(B2b), the filling becomes impossible and
It is removed, the distance in the orbiting direction is long, and the saw blade is cut out.
The volume between the two is large, and the form of fitting with the guide plate is maintained.
If it is an obstacle to the operation, it is necessary to fill it. filling
Materials (B4) include synthetic resins, soft metals, and
Porous ceramic or the like is prepared. And the cutting direction
Ablated part (B1) from inside to outside in the radial direction,
And the cutout with the cutting direction from the outer side to the inner side in the radial direction
Minute (B2) and its tip or corner
Angle of the buffer hole (B3) that opens to both sides of the saw blade
Can be an oblique angle to the side of the saw blade,
Also, the cut portions (B1), (B
If the distance (width) in the orbiting direction of 2) is short,
Two lines may be formed so as to intersect at the same point above. Well
In addition, the excised part whose cutting direction is from the inside to the outside in the radial direction
Minute (B1) and cutting direction from outside to radial direction
In the radial direction of the cut of the cut portion (B2)
The angle of the saw blade when the endless saw is straight
Incline forward in the running direction of the endless saw with respect to the top edge of the
Or, it may be a slanted angle that tilts backward.
it can. Then, the cutting direction is from the radial inside to the outside
The cut portion (B1) and the cutting direction are radial directions.
Both of the excised part (B2) from outside to inside of the
When forming on the endless saw at the same time, the radial collinear
Side by side, the width of the saw blade does not become extremely narrow
As shown in FIG. Also, off
The cut-out part (B
2) Adjacent to the two saw teeth, or one of the saw teeth
Make it smaller than a saw tooth, or make it smaller
Sequentially from the formed saw tooth, increase the adjacent saw teeth,
Can be formed to reach a predetermined sawtooth size
It (Function) Cutting that changes the cutting direction from inside to outside in the radial direction
The removed part (B1) has an endless saw linearly between the suspension pulleys.
When bent, the saw blade bends in a radial direction from the neutral plane.
The tensile stress that occurs inside the saw blade is
It expands and absorbs the volume, and an endless saw moves outside on the suspension pulley.
When bent into a curved line along the curvature of the circumference
The compressive stress generated radially inward of the neutral
The volume of the space where the saw blade is cut off is contracted and absorbed. Off
The cut-out part (B
2) is that the endless saw bent straight between the suspension pulleys
Occurs outside the neutral plane of the bending of the saw blade in the radial direction.
Compressive stress that causes the volume of the space cut by the saw blade to shrink.
The endless saw bends in a curved line on the suspension pulley.
When it is bent,
The tensile stress that occurs is the volume of the space where the saw blade is cut off.
Inflate and absorb. This cutting direction is the inner side of the radial direction
To the outside (B1) and the cutting direction
Of the cut-out portion (B2) from the outside to the inside in the radial direction.
The volume of the space is expanded and contracted to absorb the internal stress.
When the endless saw folds straight between the suspension pulleys,
Bends at a gentle angle on the suspension pulley
When you do, the bending angle is steep,
Internal stress caused by bending at a gentle bending angle
If is smaller, decrease the ratio and
For a table with a large internal stress generated at a steep angle, the ratio is high.
The bending resistance amplitude left on the endless saw is
Decrease compared to the degree of bending angle and bending pressure
It is assumed that The cutting direction is from inside to outside in the radial direction
For example, an endless saw bends the cut portion (B1)
Mao from both ends when in a random state that is not affected
The depth of the notch is gradually increased toward the
With a cutout portion (B1j) that matches the curvature of the outer circumference of the rack pulley
Then, the part where the cutout part (B1j) is formed is suspended.
Although a linear bending action is applied between the suspension pulleys,
On the suspension pulley without being affected by the curved bending on the pulley
The internal stress generated at is eliminated. On the circumference of an endless saw,
Forming a part of a linear shape, or
Form a part that gives the property of being partially linear
If the cutting direction is inward of the radial direction,
To the outside, and the shape of the bottom surface of the suspension pulley is
If a cut portion (B1j) having a shape matching the rate is formed,
The part of the saw blade is bent linearly between the suspension pulleys.
Bending for bending and bending on the suspension pulley
All internal stresses are eliminated without being affected by the strain. Notch
Excision part (B)
1), and the cutting direction is from the outside to the inside in the radial direction
Formed at the tip or corner of the excised part (B2).
The buffer hole (B3) is formed locally at the tip and corners.
Disperses concentrated bending stresses around it, and
By dissipating the stress, the excised parts (B1), (B
2) Set the cutting direction that promotes the expansion and contraction of the volume of the space.
Ablated part (B1) from inside to outside in the radial direction, and
And the cut-out direction is from the outside to the inside in the radial direction
(B2) and the tip portion or corner portion
The filler (B4) filled in the buffer hole (B3) is the cut portion.
The volume of the space where the saw blade is cut off by the minutes (B1) and (B2) is large
Insufficient volume to maintain the form of fitting with the guide plate
If so, replenish the volume. Radial direction of cut
Incision (B1) from inward to outward and incision
The cut-out portion (B in the radial direction from outside to inside)
2), especially with a short distance (width) in the orbiting direction
When formed, the back of the saw blade and the surface facing outward in the radial direction
On each side of the saw blade, which appears as a cut in each of the
The angle of the direction of communication is the angle perpendicular to the side of the saw blade.
Then, when the endless saw bends on the suspension pulley,
Bend into a polygonal shape with the cutout as the apex. to this
In contrast, the angle of the direction that leads to both sides of the saw blade is the diagonal angle
Then, insert the cut portion between them and cut the saw blade.
The sharp-angled parts of the
The rigidity of the divided small part of the saw blade is constant
Connected and connected all around the saw blade, endless saws suspended
Extremely polygonal shape when folded on a rack pulley
It does not form a shape but folds into a more circular shape. Endless saw
Is the same as a saw other than an endless saw, depending on the cutting resistance of the material to be cut.
The tensile force along the rake face of the sawtooth.
A compressive stress is generated along the flank of the. This Sukui side and
The tensile and compressive stresses on the flank face are
(A) When the angle of the surface is positive, the endless saw is in a straight line
Direction of the endless saw, relative to the top of the saw blade when
At a slanted angle to the rear of the
Minutes concentrate at the bottom of the valley between the teeth. According to
If the angle of the rake face of the sawtooth is a positive angle, how to cut
Excision part (B1) whose direction is from the inside to the outside in the radial direction
For example, a slip with a short distance (width) in the orbiting direction
Angle of the cut in the radial direction
At the position that is not on the same line as the bottom point.
If it is formed at a slanted angle to the rear of the traveling direction, the stress
To the rear of the running direction from the bottom point where the
All the distance and volume of the inclined angle is secured,
Compared to the case where the angle is a right angle and the angle inclined forward,
The saw blade in the direction that resists the cutting resistance of the endless saw in the running direction.
Increase the rigidity of. Also, the angle of the rake face of the sawtooth is
The angle of cut is from outside to inside in the radial direction.
The cut portion (B2) to be cut is, for example, the distance in the circling direction.
When forming a slit with a short (width),
The radial angle of the notch is the same as that of the endless saw.
If it is formed at a slanting angle to the rear of the running direction, the cutting
Running of the saw blade except the part where the part (B2) is formed
Increase the rigidity in the direction against the cutting resistance of the direction. That
The sawtooth rake face angle is negative and
Excision part (B)
1), and the cutting direction is from the outside to the inside in the radial direction
The cutout portion (B2) is, for example, the distance (width) in the orbiting direction.
When forming the slit as a short slit, the cut
The angle of the radial direction of the end is tilted forward of the traveling direction of the endless saw.
When it is formed at a certain angle, it is raw along the rake face of the sawteeth.
Increases the rigidity of the saw blade in the direction that resists tensile stress.
Excision part with the cutting direction from the outer side to the inner side in the radial direction
The saw teeth adjacent to (B2) are formed smaller than the predetermined saw teeth.
Or, in order from the small saw tooth,
Increase the size of adjacent saw blades to obtain a predetermined saw tooth size.
When it is formed so as to reach the end, the cutting resistance applied to the saw tooth is divided.
The part of the saw blade with less saw tooth and smaller saw teeth
The load on cutting resistance is reduced. (Example) An example will be described with reference to the drawings.
In the embodiment shown in FIG. 6, the cutting direction is inward of the radial direction.
To the outside and in the direction leading to both sides of the saw blade, the back of the saw blade
And a cutout (B1) that opens on both sides of the saw blade that continues to the back
The distance (width) in the orbiting direction from the cut edge on the back of the saw blade
Saw-tooth of approximately 1/3 saw teeth of the same size up to the end
(B1a), the cutting depth is
Reach the neutral surface of the bend and attach a semi-circular roundness to the bottom of the tip.
The teeth are formed on the entire circumference of the saw blade at a pitch of three saw teeth.
The embodiment shown in FIG. 7 shows a suspension pulley, in particular a suspension for driving.
Corresponding to when the rack pulley has teeth, how to cut
Excision part (B1) whose direction is from the inside to the outside in the radial direction
The same shape and teeth as the teeth formed on the outer circumference of the suspension pulley.
It is formed on the pitch and around the entire circumference of the saw blade. The fruit shown in FIG.
In the example, the cutting direction is from the inside to the outside in the radial direction.
If the endless saw is in a linear state, the removed part (B1)
The distance (width) in the lap direction is from the cut on the back of the saw blade
Wedge-shaped slit (B
1c) and the direction leading to both sides of the saw blade at its tip
And a buffer hole (B-shaped) that opens on both sides of the saw blade.
3) is formed and the wedge-shaped slit (B1c) is formed.
Both the buffer holes (B3) are bent more than the material forming the saw blade.
It is filled with a filler (B4) having a low resistance to scratching. First
In the embodiment shown in FIG. 9, the cutting direction is from the inside of the radial direction.
The distance width in the circling direction of the cut portion (B1d) to be located outside is approximately
There are four unsaw teeth, and the front of the endless saw in the running direction.
The corners facing each other at the rear have a rounded shape,
Is filled with the filler (B4). Implementation shown in FIG.
An example is excision with the cutting direction from the radial inside to the outside.
Around the part (B1), the distance [width] in the orbiting direction is approximately 4 saw teeth.
In minutes, the depth of cut gradually decreases from both ends toward the center.
The cut portion (B1e) that has been cut, and both edges of the saw blade
A circular conical shape that opens to both sides of the saw blade in the direction leading to the side
-Shaped buffer hole (B3) is formed, and the filling is filled inside
There is. In the embodiment shown in FIG. 11, the cutting direction is the radial direction.
From the inside to the outside of the saw blade on both sides
The sawtooth-shaped cut-out portion (B1f) that opens is almost sawtooth.
It is formed on the entire circumference of the saw blade at a pitch of 4 pieces. Fig. 12
In the example shown in, the cutting direction is from the outer side to the inner side in the radial direction.
Between the saw teeth in the direction leading to both sides of the saw blade.
At the bottom of the valley, the surface facing outward in the radial direction of the saw blade and the radial direction
Conical shape with openings on both sides following the outward facing surface
Insert the cut portion (B2a) of the saw blade with three saw teeth in between.
It is formed all around. The embodiment shown in FIG. 13 has a notch
The direction is from the outside to the inside of the radial direction, and the buffer hole is at the tip.
If the endless saw with (B3) is in a straight line
3 slit-shaped slits (B2b)
Is formed on the entire circumference of the saw blade with a space between them. 14th-I
Figures 14-II and 14-III show the back of the saw blade.
And part of both sides of the saw blade from the inside to the outside in the radial direction.
It is a view in the field of view with the cutting direction inward of the radial direction.
From the outside to the outside (B1) is the distance in the circuit direction
When the (width) is short, the cut surface is on the back of the saw blade.
It indicates the angle of the direction that leads to both sides of the saw blade.
The embodiment shown in FIGS. 14-I and 14-II
Is the angle at right angles to the sides of the saw blade.
The embodiment shown in FIG.
Is a cut-off portion (B
Two are formed so that 1) intersects at the same point on the circuit.
It FIG. 15 is directed outward in the radial direction of the saw teeth and the saw blade.
A view of the surface from the outside to the inside in the radial direction
And the cutting direction is from outside to inside in the radial direction.
When the removed part (B2) has a short distance (width) in the orbiting direction
, Radially outward of the saw blade, at the bottom of the valley between the teeth
On both sides of the saw blade that appears as a cut on the side facing
It shows the angle of the passing direction, and
Examples are saw teeth with different shapes in one endless saw,
And the sequence of saw teeth with different shapes
The angle to the side of the body is right angle and diagonal angle.
It The embodiment shown in FIG. 16 is a sawtooth rake for an endless saw.
The face angle is positive and the cutting direction is the radial direction.
Of the wedge-shaped slit (B1g) that faces the outside
Set the angle of the cutting direction of the
Place the saw endlessly behind the tip in the running direction and run
The slanted angle is slanted backward in the row direction. Seventeenth
In the example shown in the figure, the angle of the rake face of the sawtooth of an endless saw is
It is a positive angle, and the cutting direction is from the outside to the inside in the radial direction.
The slit of slit (B2c)
The angle of the direction is an angle that is slanted backward in the traveling direction of the endless saw.
To the rear of the slit (B2c).
The saw tooth is formed smaller than a predetermined saw tooth. First
The embodiment shown in FIGS. 8 and 19 is the rake face of the sawtooth of an endless saw.
Both angles are negative angles.
An example is a wedge whose cutting direction is from inside to outside in the radial direction.
Angle of B-shaped slit (B1h) in the cutting direction
And the diagonal angle inclined forward in the traveling direction of the endless saw
However, in the embodiment shown in FIG. 19, the cutting direction is the radial direction.
Slot-shaped slit (B2d) from outside to inside
The angle of the cutting direction of the endless saw ahead of the traveling direction
At an oblique angle to the slit (B2d)
The saw tooth adjacent to the front is formed smaller than a predetermined saw tooth.
It In the embodiment shown in FIG. 20, the cutting direction is the radial direction.
Wedge-shaped slit from inside to outside (B1c)
And a circle whose cutting direction is from the outside to the inside in the radial direction
The cut parts (B2a) of the shape are alternately arranged on the circumference, and the saw
Formed around the entire body. The embodiment shown in FIG.
Of a circular conical shape whose radial direction is from the outside to the inside
The cut portion (B2a) is formed with a relatively long pitch, and
Partial straight line between the conical cutouts (B2a)
And the shape of the saw blade that is straight
The direction from the inside to the outside of the radial direction, and the top of the saw blade in that part
From both ends on the side, gradually deepen the notch toward the center,
The shape of the bottom surface matches the curvature of the outer circumference of the suspension pulley.
The removed portion (B1j) is formed. (Effect of the invention) The cutting direction is radiated to the saw blade of an endless saw.
Multiple cutouts (B1) from inside to outside
Or the cutting part with the cutting direction from the outside to the inside in the radial direction
Minutes (B2) or multiple cutouts (B1), (B
When a plurality of both of 2) are formed, the endless saw is circulating and rotating.
The internal stress of is absorbed and the value of bending resistance is reduced.
The endless saw flexibly bends and
It smoothly circulates and turns. And the amplitude of the remaining bending resistance
By the action of reducing the
It promotes circulation rotation. From the inside to the outside of the radial direction
The cut-out part (B1) toward the center part from both ends.
The depth of the cut is gradually deepened, and the shape of its bottom surface is endless.
Random shape in which the saw is not subject to bending from being straight
Suspension pulley from a random state that is not affected by bending and bending
Up to a curved line that follows the curvature of the outer circumference of
Of the suspension pulley when any of the
Excised part (B1j) that matches or approximates the rate
Then, the part of the saw blade that formed the cut-out part (B1j)
Min is completely unaffected by bending on the suspension pulley
Or to reduce the saw blade on the saw blade.
Gives enough rigidity to support the part, cutting action
The efficiency of can be improved. Also, an endless saw orbit
Top part that is partially straight or near straight
Minute, partially linear, or nearly linear
Release the cutting direction to the part that gives the nature
From the inside to the outside of the shooting direction, from both ends to the center
The depth of the cut gradually, and the shape of the bottom of the
Resection that matches or approximates the curvature of the outer circumference
When the minute (B1j) is formed, the part of the saw blade is circulated.
Not subject to the effects of straight and curved bending during motion
In order to reduce or reduce it, the part of the saw blade
In addition, with a margin of rigidity as a base to support the sawtooth part
Giving and improving the efficiency of cutting action, it is also an endless saw
Lead to advantageous conditions in designing. Radial direction of cut
Incision (B1) from inward to outward and incision
The cut-out portion (B in the radial direction from outside to inside)
Form a buffer hole (B3) at the tip or corner of 2)
Then, the internal reaction is concentrated locally at the tip and corners.
Generation of cracks caused by force and growth of cracks
The saw blade is prevented from being broken by the
Action of promoting expansion and contraction of the volumes of (B1) and (B2)
Allows the endless saw to bend more flexibly and smoothly circulate
To do. Excision with the cutting direction from the radial inside to the outside
Part (B1) and cutting direction from outside in the radial direction
The incision (B2) and its tip, or
Fill the filler (B4) into the buffer hole (B3) formed in the corner.
By filling, maintain the form of fitting with the guide plate
Volume to replenish the volume to maintain the proper relationship with the guide plate.
The cutouts (B1), (B2) and the buffer holes
It is possible to eliminate the entry and accumulation of sawdust etc. into (B3)
It Excision part with cutting direction from radial inside to outside
Minute (B1) and cutting direction from outside to radial direction
The cut portion (B2) to
If you want to make the (width) short, make sure that both sides of the saw blade are
The angle of the direction of communication with the side of the saw blade
Then, the endless saw is bent into a more circular shape and suspended.
Curved rotation on the rack pulley smoothly, and the cut portion
Place (B1) and (B2) in between to connect the rigidity between the excised parts.
The subsequent action forms its weakened excision
Part of the saw blade on the raised part due to cutting resistance is partially bent back and raised
To a lower degree. Radial cutting direction
Excision part (B1) from inside to outside and notch
Excision part (B2) whose direction is from the outside to the inside in the radial direction
Of the cutting angle, the endless saw is straight
When the angle is diagonal to the top of the saw blade,
Rigidity of the saw blade against the cutting resistance in the running direction of the endless saw.
The efficiency of the cutting action can be improved.
It Excision part with cutting direction from outside to inside in radial direction
Make the saw tooth adjacent to the minute (B2) smaller than the predetermined saw tooth.
Formed, or in order from the small formed saw tooth
Next, increase the size of adjacent saw teeth,
Shape so that the cut portion (B2) is formed.
Reduces the burden on the cutting resistance of the saw blade of the formed part,
Prevents partial bending due to disconnection resistance to a lower degree
It

【図面の簡単な説明】第１図は本発明の無端の鋸を構成要素の一つとする携帯
用鋸機の１実施例の左側面図。第２図は第１図のＡ−Ａ
線断面図。第３図は第１図の一部分を拡大させ、本発明
の無端の鋸と案内板の嵌合の形態を説明する図であり、
第４図は第３図をさらに拡大、一部省略したＢ−Ｂ線断
面図である。第５図は本発明の無端の鋸の鋸身の外面を
形成する、背面、両側面、放射方向の外方に向いた面の
区分を説明する図。第６、７、８、９、１０、１１、１
２、１３、１６、１７、１８、１９、２０、２１図は本
発明の無端の鋸の切除部分（Ｂ１）、（Ｂ２）の実施例
を示す図。第１４−Ｉ図、第１４−ＩＩ図、第１４−Ｉ
ＩＩ図は本発明の無端の鋸を放射方向の内方から外方に
向って視野に入れた図であり、周回方向の距離（幅）を
短かくする場合の切除部分（Ｂ１）の両側面に通ずる方
向の角度を示している。第１５図は本発明の無端の鋸を
放射方向の外方から内方に向って視野に入れた図であ
り、周回方向の距離（幅）を短かくする場合の切除部分
（Ｂ２）の両側面に通ずる方向の角度を示している。１……フレーム体、１ａ……フレーム体の前脚柱部、
１ｂ……フレーム体の後脚柱部１ｃ……フレーム体の
把手部、２…………無端の鋸、２Ａ………鋸歯部、
２Ｂ……………鋸身、３……懸架プーリ、３ａ……懸
架プーリの回転軸、４…………電動モータ、５……
…操作スイッチ、６…………板状のベース、７………
昇降案内機構、７ａ……………案内立軸、７ｂ……
摺動スリーブ、７ｃ……支持板、７ｄ、７ｅ………リン
ク、７ｆ………ネジリコイルバネ、７ｇ………………
ピン、７ｈ………収納ドラム、８………仕切板、
９…………………緊張機構、９ａ………蝶頭付ネジ
軸、９ｂ………送りナット、１０……案内板、Ｗ１…
…鋸身の背面、Ｗ２……鋸身の側面、Ｗ３……鋸身の
放射方向の外方に向いた面。５．付記本明細書で用いた無端の鋸に関する語句について、以下
にその意味する範囲を設定する。境界面…………無端の鋸の鋸歯の底面ないし底辺、ある
いは底点を継いだ単一の面。鋸歯部…………無端の鋸の境界面より放射方向の外方の
部分。鋸身…………無端の鋸の境界面より放射方向の内方の
部分。鋸身の頂部……鋸身を放射方向に１５等分したうち、最
も内方に位置する部分。鋸身の背面……鋸身の頂部の外面。鋸身の側面……鋸身の頂部を除く部分の側方の面。鋸身の頂辺……鋸身の放射方向の最も内方の辺（面）。（面）鋸身の背の……境界面から鋸身の頂辺（面）までの距
離。高さ鋸身の底部……鋸身を背の高さで２等分したうち、放射
方向の外方の部分を範囲とする部分。所定の鋸歯……鋸歯のうち最も大きく、切断作用の主体
となる鋸歯。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a left side view of one embodiment of a portable saw machine including an endless saw of the present invention as one of its constituent elements. FIG. 2 shows AA of FIG.
FIG. FIG. 3 is an enlarged view of a part of FIG. 1 for explaining a mode of fitting the endless saw and the guide plate of the present invention,
FIG. 4 is a sectional view taken along line BB in which FIG. 3 is further enlarged and partly omitted. FIG. 5 is a view for explaining the division of the back surface, both side surfaces, and the radially outward facing surface forming the outer surface of the saw blade of the endless saw of the present invention. 6th, 7th, 8th, 9th, 10th, 11th, 1st
2, 13, 16, 17, 18, 19, 20, and 21 are views showing an example of the cutout portions (B1) and (B2) of the endless saw of the present invention. 14-I, 14-II, 14-I
FIG. II is a view of the endless saw of the present invention in the field of view from the inner side to the outer side in the radial direction, and both side surfaces of the cut portion (B1) when the distance (width) in the circumferential direction is shortened. The angle of the direction leading to. FIG. 15 is a view showing the endless saw of the present invention from the outer side to the inner side in the radial direction, and both sides of the cut portion (B2) when the distance (width) in the circumferential direction is shortened. The angle of the direction leading to the surface is shown. 1 ... Frame body, 1a ... Front pedestal of frame body,
1b ... rear pillar of frame body 1c ... handle of frame body, 2 ... endless saw, 2A ... sawtooth portion,
2B ……………… Saw blade, 3 …… Suspension pulley, 3a …… Rotary shaft of suspension pulley, 4 ………… Electric motor, 5 ……
… Operation switch, 6 ………… Plate-shaped base, 7 ………
Lift guide mechanism, 7a ……………… Guide vertical shaft, 7b ……
Sliding sleeve, 7c ... Support plate, 7d, 7e ... Link, 7f ... Torsion coil spring, 7g ...
Pin, 7h ……… Storage drum, 8 ……… Partition plate,
9 …………………… Tension mechanism, 9a ………… Screw shaft with butterfly head, 9b ……… Feed nut, 10 …… Guide plate, W1…
… Saw blade rear surface, W2 …… Saw blade side surface, W3 …… Saw blade radial outward surface. 5. Appendix Regarding the words and phrases relating to the endless saw used in this specification, the meaning range is set below. Boundary surface: A single surface that joins the bottom or bottom of the sawteeth of an endless saw, or the bottom point. Sawtooth portion: A portion radially outward from the boundary surface of an endless saw. Saw blade ………… Inward from the boundary surface of the endless saw in the radial direction. Top of the saw blade: The innermost portion of the saw blade divided into 15 equal parts in the radial direction. The back of the saw blade ... The outer surface of the top of the saw blade. Side surface of saw blade ... side surface of the portion except the top of the saw blade. The top of the saw blade ... The innermost side (face) of the saw blade in the radial direction. (Surface) On the back of the saw blade: The distance from the boundary surface to the top side (face) of the saw blade. Height The bottom of the saw blade .... The portion of the saw blade divided into two parts at the height of the back, which is the outer part in the radial direction. Predetermined saw tooth: The largest saw tooth and the main sawing tooth.

Claims

(1) A saw tooth portion (2A) is formed on an outer side in the radial direction on the same plane or in the same layer, and a saw blade (2B) is formed on the inner side of the saw tooth portion (2B). It is not a chain shape but a single shape, the height of the back from the tip of the saw blade to the top side (face) of the saw blade (2B) is 25 mm or less, and the saw tooth width of the saw tooth portion (2A) is 8 mm.
In the case of a saw-shaped endless saw (2) having a cross-sectional shape of the saw blade (2B) of not more than mm, which is either convex or concave, the cutting direction is from the radial inner side to the outer side, In the direction leading to both sides of the saw blade (2B),
Saw blade (2B) following the back of B) and the back of saw blade (2B)
Of the saw blade (2B) with the cutting depth less than the height of the saw blade (2B) and the distance (width) in the orbiting direction of 100 mm or less. A plurality of saw blades (2B) are formed at intervals over each other, or between the saw blades, the cutting direction is from the outer side to the inner side in the radial direction, and the saw blades (2B) extend in a direction leading to both side surfaces of the saw blade (2B). Of the saw blade (2B), which is open to both sides of the saw blade (2B) following the radial outward surface of the saw blade (2B) and the radial outward surface of the saw blade (2B). A plurality of cut portions (B2) having a distance (width) of 70 mm or less in the circling direction which is less than the height of the saw blade, are formed at intervals over the entire circumference of the saw blade (2B), or the cut portions (B1). ) And excision part (B2)
An endless saw (2) in which a plurality of both are formed at intervals over the entire circumference of the saw blade (2B). (2) The endless portion according to claim 1, wherein the cutout portion (B1) whose cutting direction is from the radial inside to the outside is a tooth groove (B1b) which meshes with teeth formed on the outer circumference of the suspension pulley (3). Saw (2). (3) When the endless saw (2) is in a linear state in the cut portion (B1) whose cutting direction is from the radial inside to the outside, from the cut end on the back surface of the saw blade (2B) to the tip. The endless saw (2) according to claim 1, wherein the endless saw (2) is a wedge-shaped slit (B1c) in which a circumferential distance (width) is gradually reduced toward the portion. (4) The cut portion (B2) whose cutting direction is from the outer side to the inner side in the radial direction is a slit-shaped slit (B2b) when the endless saw (2) is in a linear state. 1
The described endless saw (2). (5) The endless saw (2) as a whole in the orbiting direction is in a straight state from a bending state in which it is not affected by bending, or in a bending state in which it is not affected by bending, and the outer circumference of the suspension pulley (3). Up to the state of a curved line that follows the curvature of
In either state, the cutout portion (B1) whose cutting direction is from the radial inside to the outside gradually deepens the cut from both ends toward the center, and the shape of the bottom surface is The cut portion (B1j) having a shape that matches or approximates the curvature of the outer circumference of the pulley (3).
The described endless saw (2). (6) A plurality of partially linear or partially linear portions are formed on the circumference of the endless saw (2), or partially linear or nearly linear. Form a plurality of parts that give the nature to get into a state, and cut in the part of the saw blade (2B) from the inside to the outside in the radial direction and gradually cut from both ends toward the center part The endless saw (2) according to claim 1, characterized in that the cutout portion (B1j) is deepened and the shape of its bottom surface matches or approximates the curvature of the outer circumference of the suspension pulley (3). (7) The cut portion (B1) whose cutting direction is from the inside to the outside in the radial direction and the cut portion (B2) whose cutting direction is from the outside to the inside in the radial direction are conical or circular. Cut-out parts (B1f), (B2
Endless saw (2) according to claim 1, which is a). (8) At the tip or corner of the cut portion (B1) whose cutting direction is from the radial inside to the outside, and the cut portion (B2) whose cutting direction is the radial outside to the inside. , In the direction leading to both sides of the saw blade (2B),
A buffer hole (B3) having a conical shape or a shape similar to the conical shape, which is open on both side surfaces of B).
The described endless saw (2). (9) Excision part (B1) whose cutting direction is from inside to outside in the radial direction, and cutting parts (B2) whose cutting direction is from outside to inside in the radial direction, and their tip or corner. In the buffer hole (B3) formed at the corner, the saw blade (2
Endless saw (2) according to claims 1 and 8 filled with a filling (B4) having a lower resistance to bending than the material forming B). (10) Excision part (B1) whose cutting direction is from inside to outside in the radial direction, and cutting part (B2) whose cutting direction is from outside to inside in the radial direction, and their tip or corner. The saw blade (2) of the buffer hole (B3) formed at the corner
The angle in the direction leading to both side surfaces of B) is an angle other than a right angle with respect to the side surface of the saw blade (2B).
And an endless saw (2) according to 8. (11) The angle of the cutting direction of the cutting portion (B1) whose cutting direction is from the radial inside to the outside and the cutting portion angle (B2) whose cutting direction is the radial outside to the inside is The endless saw (2) according to claim 1, wherein when the endless saw (2) is in a straight line state, the saw blade (2B) is inclined at an angle other than a right angle with respect to the top side. (12) Two saw teeth adjacent to the front and the rear in the running direction of the endless saw (2) of the cut portion (B2) whose cutting direction is from the outer side to the inner side in the radial direction, or either one of them. 2. The endless shape according to claim 1, wherein each of the saw teeth is formed to be smaller than a predetermined saw tooth, or adjacent saw teeth are sequentially increased from the formed saw tooth so as to reach a predetermined saw tooth size. Saw (2).