JP6204071B2 - Saw blade for electric saw - Google Patents

Description

  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.

  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.

  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.

  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.

JP 2001-179536 A

  However, the saw blade for an electric saw described in Patent Document 1 is a pull-type saw blade, and chips may scatter to the operator and interfere with the work.

  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.

  Therefore, the saw blade for an electric saw according to the present invention is a saw blade used in an electric saw that linearly reciprocates the saw blade, and is manufactured in a push-cut form in which each tooth of the saw blade has a cutting blade on the tip side. , With respect to a reference straight line connecting the tip of the most advanced tooth and the tip of the base tooth, the tooth tip line connecting the tooth tips of each tooth is curved downward and the length of the reference straight line Is a length 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, while the tip of each tooth of the saw blade is the bottom And the left and right inclined sides inclined so as to approach each other from both ends of the base are formed into a shape in which the height is gradually continuous in the longitudinal direction of the saw blade, and is cut at the outer edge of the tooth tip. A blade is formed, and a biting portion that bites in contact with the member to be cut is located in the center of the bottom side. Characterized in that it is formed to protrude.

  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.

  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.

  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.

  The third feature of the present invention is that a biting portion is formed in the bladed portion, and the biting portion is brought into point contact with the member to be cut at the time of cutting. Thereby, even though the bladed portion has a substantially triangular cross section, the biting portion surely bites the member to be cut, so that excellent cutting performance can be guaranteed.

  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.

  In addition, the cross-sectional shape consisting of the tooth tip of each saw blade and the left and right inclined sides inclined so as to approach each other from both ends of the base is continuous so that the height gradually decreases in the longitudinal direction of the saw blade. When the cutting blade is formed at the outer edge of the tooth tip, the gap between the saw plate and the member to be cut can be opened to reduce the frictional resistance of the saw blade.

It is a schematic perspective view which shows embodiment of the saw blade for electric saws which concerns on this invention. It is an enlarged side view which shows the said embodiment. It is an expansion perspective view which shows the said embodiment. It is a figure for demonstrating operation | movement of the said embodiment.

  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 saw blade 10 for an electric saw has an elongated blade shape, and a plurality of teeth having a substantially triangular side surface at a predetermined height are formed at a predetermined pitch at the lower end edge of the saw plate 11. An attachment portion 12 to the electric saw is formed on the proximal end side.

  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 distal tooth 13 and the tooth tip of the most proximal tooth 14 of the saw plate 11. It is curved with a substantially constant curvature so as to be convex downward, and the distance from the tooth tip of each of the plurality of teeth to the reference straight line A is the largest at the tooth 16 facing the midpoint of the reference straight line A, and the saw blade 11 It becomes smaller toward the distal end side and the proximal end side.

  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 tooth 16 is 15 mm or less.

  Further, the tooth tip portion 15 of each of the plurality of teeth of the saw plate 11 has a cross-sectional shape composed of a base and left and right inclined sides inclined so as to approach each other from both ends of the base, and the height gradually increases in the longitudinal direction of the saw blade. A cutting edge 15A having a continuous shape so as to be lowered is formed by rolling or polishing, and an outer edge of the cutting edge 15A is polished to form a cutting blade 15B in a push-cut form of the cutting edge 15A.

  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 workpiece 20, the saw plate 11 is moved forward. In the direction of arrow H in FIG. 4, chips are discharged forward while the cutting blades 15 </ b> B having a plurality of teeth cut the workpiece 20.

  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 workpiece 20, so that there is no risk of being dragged by the saw plate 11 and colliding with the workpiece 20. Is expensive.

  Further, when cutting, it is necessary to reciprocate linearly while pressing the saw plate 11 against the workpiece 20 from above. However, if the saw plate 11 is curved downwardly as described above, the saw plate 11 is pressed from above. When the linear reciprocating operation is performed, the cutting blade 15B in the push-cut form efficiently bites into the workpiece 20 and cuts it, so that it can be largely cut and the work efficiency is good.

  Further, since the tooth cutting portion 15A has a substantially diamond shape in cross section and the cutting edge 15B is formed on the outer edge thereof, a groove having a width wider than the saw blade 11 is cut in the workpiece 20, and the saw blade 11 is covered. The cutting member 20 is pressed and hardly receives resistance, and can be cut lightly.

DESCRIPTION OF SYMBOLS 10 Saw blade 11 Saw board 12 Mounting part 13 The most advanced tooth 14 Base end tooth 15 Tooth tip part 15A Cutting part 15B Cutting blade

Claims (2)

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) has a push-cut form having a cutting blade (15B) on the tip side ,

All of the plurality of saw blades (10) with respect to a reference straight line (A) connecting the tip of the most advanced tooth (13) and the tip of the base tooth (14) of the saw blade (10). The tooth tip line (E) connecting the tooth tips of the teeth is curved downward and convex with a certain curvature,
The length (L) of the reference straight line (A) is in the range of 75 mm to 600 mm, and the tooth (16) at the midpoint position of the reference straight line (A) is the most from the reference straight line (A). it is away from the tooth tip of the tooth (16), one distance to the reference straight line (a) (C) is 15mm or less,
The tip (15A) of each tooth of the saw blade has a cross-sectional shape consisting of a bottom and left and right inclined sides inclined so as to approach each other so that the height gradually decreases in the longitudinal direction of the saw blade. None was allowed to continuously shape, tooth tip has an outer edge to the cutting edge of the (15A) (15B), the center of the bottom eating with portions stick eating contact point to be cut member (20) ( electric saw for saw blade 15C) is characterized in that it is protruded downward.   A cross-sectional shape consisting of two oblique sides of a triangle inclined so as to approach each other as it goes downward from both ends of the base is continuous in the longitudinal direction of the saw blade at the base of the tooth tip (15A). The saw blade for an electric saw according to claim 1, wherein the tip of the blade is a biting portion (15 </ b> C) to the member to be cut (20).

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