JPS59114004A - Circular saw edge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a rotary piece i! using a drive source such as a motor or an engine. l1
This relates to a circular saw blade for cutting materials such as wood and building materials.

BACKGROUND ART Conventionally, as a circular saw blade for cutting materials such as wood and building materials, the one described in Japanese Patent Publication No. 46-21856 is known. As shown in Fig. 9, an elongated arc-shaped slot 1-1 of the same width is punched out between the outer periphery (B) and the center (C) of the base plate (A) of the circular saw. B)
The expansion strain caused by the frictional heat of When the contact area between the small substrate (A) and the material to be cut is large, the rigidity of the substrate (A) is maintained and the substrate (A) does not bend, but the elasticity of the material to be cut causes the substrate (A) to be cut. There is a problem in that when it is inserted into the material, a large load is applied to the circular saw blade, making it impossible for the circular saw blade to cut the material efficiently.In order to solve this problem, the through hole is made larger. , the rigidity of the board (a) decreases, and as shown in Figure 10, the board (a) bends due to the resistance (b) during cutting, making it impossible to cut the material to be cut (aluminum) straight, and the load increases. There was a problem in that the height of the cut material tal was increased and the material to be cut tal could not be cut efficiently.

The present invention has been made in view of the above-mentioned problems, and includes:
The purpose is to provide a circular saw blade that can efficiently cut a workpiece with a low cutting load.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 8. One circular saw blade is connected to a motor (not shown) housed in a casing 2, and by operating a switch 8, electricity is supplied to the motor from a storage battery (not shown) housed in the casing 2. and is rotated in the direction of arrow X. The circular saw blade l has an outer circumferential part 6 having a plurality of saw cutting blades 4 distributed left and right, and a mounting hole 7 drilled in the center into which a drive shaft 6 driven by a motor multiple rotations is fitted. It is composed of a mounting portion 8 and a plurality of crosspieces 9 that connect the outer peripheral portion 5 and the mounting portion 8.

The outer peripheral part 5, the mounting part 8, and the crosspiece 9 are integrally formed of metal material and are on the same plane. The crosspiece 9 is formed in an arc shape with a concave side in the direction of rotation of the circular saw blade 1, and the width gradually increases toward the outer circumference 5, and a recess 10 is formed on one side by press working. Crosspiece 9 is through hole 1
1 are separated from each other. According to this embodiment, the crosspiece 9 thermally expands due to the heat generated by sliding contact with the material to be cut, but the width gradually increases toward the outer periphery 5. As shown in (8), the thermal expansion expands in the radial direction near the mounting hole 7 and gradually changes toward the outer circumference (8).
Although the position of the tip of the saw blade 4 will be slightly shifted, the shape of both chambers 12 and the rake angle (
C, pitch (Pl, etc.) does not change.Also, the recess I
O formed by press processing can increase the strength of the crosspiece 9, so the width of the crosspiece 9 can be narrowed, the load can be lowered, and the material to be cut can be cut efficiently as shown in FIG.
It is possible to cut l.

In the above embodiment, the recess 10 is formed on one side of the crosspiece 9, but the recess opening may be formed on both sides of the crosspiece 9 as shown in FIG. According to this embodiment, the sliding resistance between the crosspiece 9 and the material to be cut is uniform on both sides of the crosspiece 9, so that the circular saw blade 1 is not distorted when cutting the material to be cut, as shown in FIG. The material to be cut +a+ can be cut straight.

Further, as shown in FIG. 5, the recesses 14 may be formed on both sides of the crosspiece 9, and the ends of the crosspiece 9 may be formed separately on both sides of the crosspiece 9. According to this embodiment, the sliding resistance between the crosspiece 9 and the material to be cut is uniform (4) on both sides of the crosspiece 9, so that the circular saw blade 1 is distorted when cutting the material as shown in FIG. It is possible to cut straightly without any problems, and the chips can be smoothly removed along the crosspiece 9 without collecting chips in the recess 14.

The circular saw blade of the present invention is characterized in that the outer peripheral part provided with the saw cutting blade and the mounting part into which the drive shaft is fitted are connected by a plurality of crosspieces, and four parts are formed on at least one side of the crosspieces. Since the circular saw blade has high strength and does not deform when cutting the material to be cut, it has the effect of cutting the material straight, and furthermore, the contact area with the material to be cut is reduced. Since the size and weight are small, the material to be cut can be cut with a low load.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a circular saw machine equipped with a circular saw blade of the present invention;
Figure 2 is a front view of the same circular saw blade as above, Figure 8 is a sectional view of Figure 2, Figures 4 and 6 are sectional views corresponding to Figure 8 in other embodiments, and Figure 6 is FIG. 7 is an operating state diagram in the embodiment shown in FIG. 2, FIG. 7 is an operating state diagram in the embodiment shown in FIG. 4 (5), FIG. 8 is an operating state diagram in the embodiment shown in FIG. The front view of the circular saw blade, FIG. 1θ, is an operating state diagram in a conventional example. 4... Saw cutting blade, 5... Outer periphery, 6... Drive shaft, 8
... Mounting part, 9... Crosspiece, 10, t3, 14.
・Concavity. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others) f C) Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims of Claims] 1. The outer peripheral part provided with the saw cutting blade and the mounting part into which the drive shaft is fitted are connected by a plurality of crosspieces, and a recess is formed on at least one side of the crosspieces. circular saw blade. 2. The circular saw blade according to claim 1, wherein the crosspiece is formed in an arc shape whose width becomes wider toward the outer periphery.