JPH0739601Y2 - Circular saw - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular saw that grinds offcuts when cutting to a certain size in the woodworking industry or the construction industry.

[0002]

2. Description of the Related Art Conventionally, in the woodworking industry, the construction industry, etc., in order to form a component material having a predetermined size from a plate material, an extra cut material is cut out leaving a cutting allowance at both ends by several mm in advance. Further, this material was cut and formed by a circular saw such as a tip saw having high cutting accuracy to obtain a desired constituent material.

The cutting stock produced by this processing is
Recently, since it takes a lot of labor, time, and cost to process it as bar-shaped chips that are deposited in the factory, it is necessary to grind this cutting allowance at the same time as cutting the material to a specified size and to cut the cutting dust with a cutting blade. Similarly to the above, there has been proposed a blade for making dust and sucking it with a dust collector provided in the vicinity of the woodworking machine and discharging the dust outdoors.

This blade 20 is, for example, as shown in FIG. 7, a blade body 21 formed separately for crushing a cutting allowance.
The blade 22 is integrally attached to the outer surface of the blade 22 with a screw 23 or the like.

[0005] This is a blade for processing a separate blade 21.
Since the structure is attached to the 22, the economic burden is increased due to the labor and cost thereof, and the overall weight of the circular saw is increased, so that the drive shaft is overloaded or a large drive source is required. Or, the saw core easily shakes, and it is impossible to cut with high precision.

It is necessary to polish the cutting edge due to wear after a certain period of use, but the cutting blade of the circular saw and the blade body of a separate body must be separated and further polished in a separate process. Since it does not happen, it is troublesome and troublesome,
Due to the extra polishing work, the product cost rises, and the purpose of product manufacture at low cost cannot be expected.

[0007] There are various problems such as.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a circular saw having a large number of cutting blades planted on its peripheral surface, By mounting a large number of crushing blades on the outside of the base metal at intervals, the structure is simple and the entire circular saw can be made lighter in weight. The purpose is to provide a circular saw that can be used as a crushing blade as well as a blade.

[0009]

[Means for Solving the Problems] The means of the present invention for achieving the above-mentioned object is to provide a disc-shaped base metal and a plurality of first blades engraved at predetermined intervals on the periphery of the base metal. In a circular saw consisting of attached cutting blades, a second blade portion having a vertical receiving surface and a horizontal receiving surface, which are engraved at intervals in the blade portion, and a lower surface of the second blade portion. A crushing blade having a crushing blade surface that is supported on the horizontal receiving surface and abuts a locking notch on the vertical receiving surface to project from the outside of the base metal and oppose the rotation direction of the circular saw. It is in the configuration of a circular saw.

[0010]

The circular saw of the present invention constructed as described above has the following actions. When this circular saw is fixed to the drive shaft of a woodworking machine and rotated at a predetermined speed, when the material is supplied to this circular saw, the material is cut by the cutting blade to the desired size, and is cut by the base metal. The crushing blade protruding outward cuts into the material of the cutting margin,
At the same time, this is cut and pulverized into dust.

At this time, the crushing blade has the locking notch in contact with the vertical receiving surface and the lower surface supported by the horizontal receiving surface in the second blade portion of the base metal. Even if a large cutting resistance is applied to the crushing blade surface of the crushing blade, the crushing blade is surely supported by the second attached blade portion and the crushing blade is not missing.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a circular saw according to the present invention will be described with reference to the drawings. In each drawing, A is a circular saw used for a circular saw machine for woodworking, etc., and a large number of first blade portions 2, 2 are formed at predetermined intervals on the periphery of a disc-shaped base metal 1 made of metal and having a predetermined thickness. …
The cutting blades 3 made of cemented carbide, carbon, alloy tool steel or the like are firmly attached to the first blade portions 2 by brazing or the like.

The cutting blade 3 has a right inclined saw tooth 3a, a left inclined saw tooth 3b, and a non-inclined saw tooth 3c, which are sequentially and continuously attached in an arrangement as shown in FIG. It is provided so that a large cutting resistance is applied to the teeth 3a, 3b, 3c of each cutting blade 3 at a time by partially performing the cutting with 3a, 3b, 3c.

Reference numeral 4 is a second blade portion provided on the peripheral edge of the base metal 1 and is provided with a plurality of cutting blades 3 arranged at intervals of a plurality of rows at intervals. A crushing blade 5 made of cemented carbide, carbon, alloy tool steel or the like is firmly attached to each of them by brazing or the like.

As shown in FIGS. 4 and 5, the second blade portion 4 comprises a vertical receiving surface 4a and a horizontal receiving surface 4b. The lower surface of the crushing blade 5 is a horizontal receiving surface. 4b, and the notch 5a provided on the crushing blade 5 is brought into contact with the vertical receiving surface 4a, and the other surface 5c is brought into close contact with the outer surface of the base metal 1. The crushing blade surface 5b protruding from the outer side and formed on the upper edge thereof is attached so as to oppose the rotation direction of the circular saw A, and a large cutting resistance is exerted on the crushing blade surface 5b formed wide during cutting. Even if it hangs, it is reliably supported by the second blade part 4.

In FIG. 1, 6 is a mounting hole fixed to a drive shaft (not shown) of the woodworking machine, and 7 is a slit for radiating cutting heat generated during cutting.

[0017]

As described above, the circular saw according to the present invention is provided with a second blade having a vertical receiving surface and a horizontal receiving surface which are engraved at intervals in the first blade of the circular saw. The lower surface of the second attached blade portion is supported by a horizontal receiving surface, and the vertical receiving surface is brought into contact with a locking notch to form a crushing blade surface which protrudes from the outside of the base metal and opposes the rotation direction of the circular saw. Since the cutting blade and the crushing blade are integrally attached to the base metal of the circular saw, the manufacturing cost of the circular saw can be significantly reduced. There is no need to install and remove with a double structure as in the past, and the number of operations and the work cost therefor are greatly reduced, the overall weight of the circular saw is also light, and the drive shaft is not overloaded. Therefore, the saw core is prevented from swinging due to this and highly accurate cutting processing is possible. Can Nau.

Since the cutting edges of the cutting blade and the crushing blade are continuously formed on the peripheral edge of the base metal of the circular saw, the polishing of each cutting edge can be performed by the same blade polishing machine, so that the polishing operation is also possible. Simplification and low cost polishing can be performed. It has special effects such as.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a circular saw according to the present invention.

FIG. 2 is an enlarged front view showing a main part of FIG.

FIG. 3 is a plan view of FIG.

4 is a front view showing a second blade portion in FIG. 1. FIG.

FIG. 5 is a plan view of FIG.

6 is a perspective view showing the crushing blade in FIG. 1. FIG.

FIG. 7 is a partial plan view showing a circular saw provided with a conventional crushing blade.

[Explanation of sign]

 1 Base metal 2 1st blade part 3 Cutting blade A Circular saw 4 2nd blade part 4a Vertical receiving surface 4b Horizontal receiving surface 5 Grinding blade 5a Locking notch 5b Grinding blade surface

Claims (1)

[Scope of utility model registration request] 1. A circular saw comprising a disk-shaped base metal and cutting blades attached to a plurality of first blades formed at predetermined intervals on the periphery of the metal base, wherein the first blade part is provided. A second blade having a vertical receiving surface and a horizontal receiving surface, which are engraved at intervals, and a lower surface of the second blade is supported on the horizontal receiving surface, and a locking notch is provided on the vertical receiving surface. A circular saw having a crushing blade which is brought into contact with the crushing blade and protrudes from the outside of the base metal so as to face the rotation direction of the circular saw.