JP2014231100A - Saw blade for electric saw - Google Patents
Saw blade for electric saw Download PDFInfo
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- JP2014231100A JP2014231100A JP2013111557A JP2013111557A JP2014231100A JP 2014231100 A JP2014231100 A JP 2014231100A JP 2013111557 A JP2013111557 A JP 2013111557A JP 2013111557 A JP2013111557 A JP 2013111557A JP 2014231100 A JP2014231100 A JP 2014231100A
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Abstract
Description
本発明は電動鋸用鋸刃に関し、特に切り屑が手前に飛散して作業の邪魔にならないようにした鋸刃に関する。 The present invention relates to a saw blade for an electric saw, and more particularly, to a saw blade that prevents chips from being scattered in front of the operation.
電動鋸には鋸刃を回転させて被切削物を切断する方式と、鋸刃を往復運動させて被切削物を切断する方式が知られている。 As the electric saw, there are known a method of cutting a workpiece by rotating the saw blade and a method of cutting the workpiece by reciprocating the saw blade.
従来の往復動方式の鋸刃では各歯の歯先を結ぶ線をほぼ直線に製作し、複数の各歯を左右にあさり分けすることにより、鋸板と被切断部材との密着に起因する鋸刃の押し引きの抵抗を少なくするとともに、切り屑を排出するようにしている。 In a conventional reciprocating saw blade, a line connecting the tooth tips of each tooth is made almost straight, and a plurality of teeth are divided into left and right so that the saw is caused by the close contact between the saw plate and the member to be cut. The drag of the blade is reduced and chips are discharged.
これに対し、鋸刃の最先端の歯の歯先と基端の歯の歯先を結ぶ直線に対して各歯の歯先を結んだ線を上方に凹状に湾曲させ、良好な切れ味(切削性能)や耐久性を得るようにした電動鋸用鋸刃が提案されている(特許文献1)。 On the other hand, the line connecting the tooth tips of the teeth with respect to the straight line connecting the tooth tips of the most advanced teeth of the saw blade and the teeth of the base teeth is curved upwardly concavely, resulting in good sharpness (cutting) A saw blade for an electric saw that is designed to obtain performance and durability (Patent Document 1) has been proposed.
しかし、特許文献1記載の電動鋸用鋸刃は引き切り式の鋸刃であり、切り屑が作業者の方に飛散し、作業の邪魔になることがあった。
However, the saw blade for an electric saw described in
本発明はかかる問題点に鑑み、切り屑が手前に飛散して作業の邪魔にならないようにした電動鋸用鋸刃を提供することを課題とする。 This invention makes it a subject to provide the saw blade for electric saws which did not get in the way of operation | work by the chips scattered in the near side in view of this problem.
そこで、本発明に係る電動鋸用鋸刃は、鋸刃を直線往復動作させる電動鋸に使用される鋸刃において、鋸刃の複数の各歯が往動方向の先端側に切り刃を有する押し切り形態に製作され、最先端の歯の歯先と基端の歯の歯先とを結ぶ基準直線に対して、複数の各歯の歯先を結ぶ線が下方に凸状に湾曲され、上記基準直線の長さが75mm〜600mmの範囲内の長さであり、上記基準直線から最も離れた歯の歯先から、上記基準直線までの距離が15mm以下であることを特徴とする。 Therefore, the saw blade for an electric saw according to the present invention is a saw blade used for an electric saw that linearly reciprocates the saw blade, and each tooth of the saw blade has a cutting blade on the tip side in the forward movement direction. A line connecting the tip of each tooth is curved downward and convex with respect to the reference straight line connecting the tip of the most advanced tooth and the tip of the base tooth. The length of the straight line is in the range of 75 mm to 600 mm, and the distance from the tooth tip of the tooth furthest away from the reference straight line to the reference straight line is 15 mm or less.
本発明の特徴の1つは鋸刃の歯を押し切り形態の切り刃とした点にある。これにより、切り屑は作業者から離れる方向に飛散するので、作業の邪魔になることはない。 One of the features of the present invention is that the teeth of the saw blade are formed into a push blade. As a result, the chips scatter in a direction away from the worker, so that the work is not disturbed.
また、鋸刃が引き切りの形態の場合、鋸刃に何らかの大きな抵抗が加わったときに作業者は被切断部材に対して引っ張る方向に負荷が作用することとなるが、鋸刃が押し引きの形態の場合には被切断部材から離れる方向に負荷が作用するので、安全性が高い。 In addition, when the saw blade is in the form of pulling, when a large resistance is applied to the saw blade, the load is applied in the direction in which the operator pulls the member to be cut. In the case of a form, since a load acts in the direction away from the member to be cut, safety is high.
また、本発明の第2の特徴は鋸刃を下方に凸状に湾曲させるようにした点にある。切断時には被切断部材に対して鋸刃を上方から押し付けて直線往復動作させる必要があるが、上述のように鋸刃を下方に凸状に湾曲させると、鋸刃を上方から押し付けて直線往復動作させたときに押し切り形態の切り刃が被切断部材に効率よく喰い込んで切断して行くので、切断量が増え、作業効率がアップする。 The second feature of the present invention resides in that the saw blade is curved downwardly in a convex shape. When cutting, it is necessary to press the saw blade against the member to be cut from above to make a linear reciprocation. However, if the saw blade is curved downward as described above, the saw blade is pressed from above to make a linear reciprocation. When this is done, since the cutting blade in the push-cut form efficiently cuts into the member to be cut and cuts, the amount of cutting increases and the working efficiency increases.
鋸刃の歯先線の湾曲の程度は電動鋸の性能によって異なるが、最先端の歯の歯先と基端の歯の歯先とを結ぶ基準直線(以下、「基準直線A」という)が75mm〜600mmの範囲内の長さの場合、基準直線Aから最も離れた歯の歯先から、基準直線Aまでの距離は15mm以下であるのが好ましい。 The degree of curvature of the tooth tip line of the saw blade varies depending on the performance of the electric saw, but a reference straight line (hereinafter referred to as “reference straight line A”) connecting the tooth tip of the most advanced tooth and the tooth tip of the base tooth is used. In the case of a length in the range of 75 mm to 600 mm, the distance from the tooth tip of the tooth furthest away from the reference straight line A to the reference straight line A is preferably 15 mm or less.
また、鋸刃の複数の歯は鋸刃の摩擦抵抗を少なくする上で、あさり分けを行ってもよいが、鋸刃の各歯の先端部を底辺と底辺の両端から相互に接近するように傾斜した左右の傾斜辺とからなる断面形状を高さ鋸刃長手方向に次第に低くなるように連続させた形状に形成し、該歯の先端部の外縁に切り刃を形成すると、鋸板と被切断部材との間に隙間をあけて鋸刃の摩擦抵抗を少なくできる。 The teeth of the saw blade may be divided to reduce the frictional resistance of the saw blade, but the tip of each tooth of the saw blade should be close to each other from the bottom and both ends of the bottom. When the cross-sectional shape consisting of the inclined left and right inclined sides is formed into a continuous shape that gradually decreases in the longitudinal direction of the height saw blade, and the cutting blade is formed on the outer edge of the tip of the tooth, The clearance resistance between the cutting members can be reduced by reducing the frictional resistance of the saw blade.
以下、本発明を図面に示す具体例に基づいて詳細に説明する。図1ないし図4は本発明に係る電動鋸用鋸刃の好ましい実施形態を示す。図において、電動鋸用鋸刃10は細長いブレード状をなし、鋸板11の下端縁には所定の高さの側面ほぼ三角形状をなす複数の歯が所定のピッチで形成され、鋸板11の基端側には電動鋸への取付部12が形成されている。
Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 4 show a preferred embodiment of a saw blade for an electric saw according to the present invention. In the figure, a
鋸板11の複数の各歯の歯先を結ぶ歯先線Eは鋸板11の最も先端側の歯13の歯先と最も基端側の歯14の歯先を結ぶ基準直線Aに対して下方に凸状となるようにほぼ一定の曲率で湾曲され、複数の各歯の歯先から基準直線Aまでの距離は基準直線Aの中点に対向する歯16で最も大きく、鋸板11の先端側及び基端側になる程小さくなっている。
A tooth tip line E that connects the tooth tips of the plurality of teeth of the saw plate 11 with respect to a reference straight line A that connects the tooth tip of the most
本例では基準直線Aの長さLは75mm〜600mmの範囲内の長さであり、基準直線Aと歯16の歯先との間の距離Cは15mm以下となっている。
In this example, the length L of the reference straight line A is in the range of 75 mm to 600 mm, and the distance C between the reference straight line A and the tooth tip of the
また、鋸板11の複数の各歯の歯先部分15には底辺と底辺の両端から相互に接近するように傾斜した左右の傾斜辺とからなる断面形状を高さが鋸刃長手方向に次第に低くなるように連続させた形状の刃付け部15Aが圧延又は研磨によって形成され、刃付け部15Aの外縁が研磨されることによって刃付け部15Aの押し切り形態の切り刃15Bが形成されている。
Further, the
本例の電動鋸用鋸刃を円柱状のワーク(被切断部材)20を切断する場合、電動鋸を作動させ、鋸板11の中央付近をワーク20に押し付けると、鋸板11の往動時(図4の矢印H方向)には複数の各歯の切り刃15Bがワーク20を切断しながら、切り屑は前方に排出される。
In the case of cutting the cylindrical workpiece (member to be cut) 20 with the saw blade for the electric saw of this example, when the electric saw is operated and the vicinity of the center of the saw plate 11 is pressed against the
このとき、鋸板11に何らかの大きな抵抗が加わったときには作業者にはワーク20から離れる方向に負荷が作用するので、鋸板11に引きずられてワーク20に衝突するなどのおそれはなく、安全性が高い。
At this time, when some large resistance is applied to the saw plate 11, a load is applied to the worker in a direction away from the
また、切断時にはワーク20に対して鋸板11を上方から押し付けながら直線往復動作させる必要があるが、上述のように鋸板11を下方に凸状に湾曲させると、鋸板11を上方から押し付けて直線往復動作させたときに押し切り形態の切り刃15Bがワーク20に効率よく喰い込んで切断するので、大きく切断でき、作業効率がよい。
Further, when cutting, it is necessary to reciprocate linearly while pressing the saw plate 11 against the
また、歯の刃付け部15Aを断面ほぼ三角形状とし、その外縁に切り刃15Bを形成しているので、ワーク20には鋸板11よりも広い幅の溝が切られ、鋸板11が被切断部材20に圧接して抵抗を受けることがほとんどなく、軽く切断することができる。
Further, since the tooth cutting portion 15A has a substantially triangular cross section and a
10 鋸刃
11 鋸板
12 取付け部
13 最先端歯
14 基端歯
15 歯先部分
15A 刃付け部
15B 切り刃
DESCRIPTION OF
Claims (2)
鋸刃(10)の複数の各歯が先端側に切り刃(15B)を有する押し切り形態に製作され、
最先端の歯(13)の歯先と基端の歯(14)の歯先とを結ぶ基準直線(A)に対して、各歯の歯先を結ぶ歯先線(E)が下方に凸状に湾曲され、
上記基準直線(A)の長さ(L)が75mm〜600mmの範囲内の長さであり、上記基準直線(A)から最も離れた歯(16)の歯先から、上記基準直線(A)までの距離(C)が15mm以下であることを特徴とする電動鋸用鋸刃。 In a saw blade used for an electric saw that linearly reciprocates the saw blade,
Each of the plurality of teeth of the saw blade (10) is manufactured in a push-cut form having a cutting blade (15B) on the tip side,
The tooth tip line (E) connecting the tooth tips of each tooth protrudes downward with respect to the reference straight line (A) connecting the tooth tips of the most advanced tooth (13) and the tooth tip of the base tooth (14). Curved into a shape,
The length (L) of the reference straight line (A) is in the range of 75 mm to 600 mm, and the reference straight line (A) from the tooth tip of the tooth (16) farthest from the reference straight line (A). A saw blade for an electric saw, wherein the distance (C) is 15 mm or less.
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JP2013111557A JP6204070B2 (en) | 2013-05-28 | 2013-05-28 | Saw blade for electric saw |
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JP2013111557A JP6204070B2 (en) | 2013-05-28 | 2013-05-28 | Saw blade for electric saw |
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JP6204070B2 JP6204070B2 (en) | 2017-09-27 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1196745A (en) * | 1967-03-18 | 1970-07-01 | Erwin Banholzer | Improvements in or relating to Saw Blades. |
US5119708A (en) * | 1991-04-17 | 1992-06-09 | Joseph Musgrove | Curved blades for reciprocating saws |
JPH08229737A (en) * | 1995-02-03 | 1996-09-10 | Robert Bosch Gmbh | Reciprocating saw |
JP2001158002A (en) * | 1999-10-19 | 2001-06-12 | Robert Bosch Gmbh | Stroke saw |
JP2012218082A (en) * | 2011-04-05 | 2012-11-12 | Ryobi Ltd | Power tool |
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- 2013-05-28 JP JP2013111557A patent/JP6204070B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1196745A (en) * | 1967-03-18 | 1970-07-01 | Erwin Banholzer | Improvements in or relating to Saw Blades. |
US5119708A (en) * | 1991-04-17 | 1992-06-09 | Joseph Musgrove | Curved blades for reciprocating saws |
JPH08229737A (en) * | 1995-02-03 | 1996-09-10 | Robert Bosch Gmbh | Reciprocating saw |
JP2001158002A (en) * | 1999-10-19 | 2001-06-12 | Robert Bosch Gmbh | Stroke saw |
JP2012218082A (en) * | 2011-04-05 | 2012-11-12 | Ryobi Ltd | Power tool |
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