Pentagonal electric circular saw blade

Abstract

To provide a motor-operated circular saw blade which suppresses occurrence of powder dust, when a foam resin-based heat insulation material is cut by a motor-operated circular saw.SOLUTION: A metal plate (expressed as a metal plate as a general term, because a shape is the invention and a feature, the material does not care) based on a pentagon whose contour / outer periphery is a straight line or a curved line, or the combination thereof, or regardless of an arc or a radius of the curved line) is rotated by a motor-operated circular saw.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a blade that uses a pentagonal shape to suppress the generation of dust when cutting and processing foamed resin insulation materials, gypsum boards, etc. [Background technology]

[0002] Until now, electric circular saw blades have been literally "round" with many protrusions (such as hard tips) in a circular shape, and cutting is achieved by overlapping scratches caused by the rotating protrusions. This generates dust equal to or greater than the number of protrusions multiplied by the number of rotations, which can be harmful to the worker's health. Furthermore, the scattering of dust can be a nuisance to neighbors, and cleaning up requires a great deal of time and effort.

[0003] While cutting hard materials like metal and wood with an electric circular saw inevitably involves repeated scratches, as in the past, for medium-soft materials, the aim is to minimize dust generation by cutting without scratching, using a thin blade and cutting edge shape, like cutting vegetables with a kitchen knife. While there are also methods for cutting without producing dust, such as using a utility knife, manual cutting often results in inconsistent cutting angles, leading to frequent problems. For this reason, cutting and construction are generally carried out with an electric circular saw, which allows for precise angle setting. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide a circular saw blade that suppresses dust generation while using an electric circular saw that allows for easy angle and cutting depth setting and fast working speed. [Means for solving the problem]

[0005] This electric circular saw features a precise cutting angle setting, a high cutting speed, and a blade that minimizes dust and cuts by rotation without scratching. The thin blade shape used for cutting is based on a pentagon, such as a Reuleaux pentagon or an approximate pentagon, which has low cutting resistance and is stable against rotation, preventing deformation even with continuous use. [Effects of the Invention]

[0006] When cutting foamed resin insulation, dust generation can be suppressed, protecting the health of workers.

[0007] It prevents dust from scattering and simplifies cleaning work, or in the case of heat-melting materials, it can eliminate cleaning work almost entirely.

[0008] This reduces material loss due to scratching and minimizes dust and debris.

[0009] When cutting stacked foam resin insulation materials with conventional circular saw blades, scraps of wood or insulation material were placed like sleepers to avoid damaging the foam resin insulation material underneath. However, when the depth is fixed with a sharp-tipped blade according to the present invention, the foam resin insulation material underneath is hardly damaged, so cutting can be done directly on top of the stacked foam resin insulation material.

[0010] The electric circular saw blade of the present invention has the same shape on both sides, so it can be rotated on either side, approximately doubling the life of the blade. [Brief explanation of the drawings] [Figure 1] The circle in the center is the standard 20mm diameter tool fixing hole for electric circular saws. From the left are the cross section and the top view. [Figure 2] This is a reference diagram of a scale or markings for easy setting of cutting depth. [Figure 3] When setting the cutting depth, the depth below the table of the electric circular saw (the white horizontal rectangle) is the cutting depth, with the top of the diagram being a shallow cutting setting and the bottom being a deep cutting setting. DETAILED DESCRIPTION OF THE INVENTION

[0011] [Figure 2] Because a normal electric circular saw blade is circular, when measuring dimensions from the electric circular saw table, which serves as the basis for cutting depth and cutting angle, the distance is roughly the same regardless of the stop position of the circular saw blade, but with a pentagonal blade, the cutting depth varies depending on the stop position, so in order to set it, the pentagonal vertex had to be positioned perpendicular to the table.To solve this, depth scales can be painted or slits (thin cut holes) can be used at each distance from the blade fixing hole in the center, making it possible to set the cutting depth regardless of the stop position. [Example]

[0012] The roughly pentagonal, Reuleaux pentagonal circular saw blade I made a few years ago is still in use today, and when using heat-melting materials such as Styrofoam (product name), it produces no dust and does not require cleaning.

[0013] In the case of materials such as Neomaform (product name), which do not melt due to heat, a very small amount of dust is generated, but it is extremely small and almost nonexistent compared to existing circular saw blades. [Industrial Applicability]

[0014] Workers around the world who cut and install foam resin insulation materials will be spared health hazards caused by dust and will be freed from the task of cleaning up dust.

[0015] A common example overseas is the large amount of dust generated when installing foamed resin insulation by do-it-yourselfers, which has been a source of concern. The roughly pentagonal circular saw blade, which suppresses dust generation, will help promote the widespread use of foamed resin insulation, which aims to save energy and reduce heating and cooling costs.

Claims

1. This is an electric circular saw for cutting foamed resin insulation materials, and it rotates a circular saw blade attached to a blade fixing hole with a diameter of 20 mm, and moves the table up and down to arbitrarily fix the exposed height of the circular saw blade, thereby setting the cutting depth and the cutting angle. The circular saw blade is a metal plate in the shape of a Reuleaux pentagon, and the metal plate has a sharp cutting edge on the outer periphery.

2. An electric circular saw as described in claim 1, wherein the metal plate in the shape of a Reuleaux pentagon has slits, holes, or grooves passing through the metal plate, the distance from the center of rotation being clearly indicated for setting the cutting depth.

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