JPH0524305U - Circular saw - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a circular saw which has a simple structure and can be formed into a lightweight circular saw as a whole, and which is capable of simultaneously performing the grinding blade and the crushing blade when polishing the cutting blade. [Structure] A second blade portion 4 having a vertical receiving surface 4a and a horizontal receiving surface 4b, which are engraved at intervals in the first blade portion 2, and the lower surface of the second blade portion 4 is horizontally received. The crushing blade 5 that is supported on the surface 4b and has the notch 5a abutted on the vertical receiving surface 4a, projects from the outside of the base metal 1 and has a crushing blade surface 5b that opposes the rotation direction of the circular saw A. Be prepared. [Effect] The structure is simple and the entire circular saw can be formed to be lightweight, and further, the grinding blade can be used simultaneously with the cutting blade when polishing the cutting blade.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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]

[Prior Art]

 Conventionally, in the woodworking industry or the construction industry, in order to form a component material with a predetermined size from a plate material, an extra cut material is cut out with a cutting allowance at both ends, and this material is cut. The desired components were obtained by cutting and molding with a circular saw such as a tip saw with high cutting accuracy.

The scraps generated by this processing in the form of cutting allowances become rod-shaped chips and are deposited in the factory, and it takes a lot of labor, time and cost to process them. There has been proposed a blade for crushing this cutting allowance into powder dust similar to the cutting dust produced by a cutting blade, which is then sucked by a dust collector installed near the woodworking machine and discharged outdoors.

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

[0005] Since this is a structure in which a separate blade 21 is attached to the blade 22 for processing, the labor cost and the cost therefor increase the economic burden, and the total weight of the circular saw increases. If the drive shaft is overloaded or a large drive source is required, the saw core easily shakes and high-precision cutting cannot be performed.

After a certain period of use, it is necessary to polish the cutting edge due to wear, but the cutting blade of the circular saw and the separate blade body must be separated and must be polished in a separate process. Since it has to be done, it is troublesome and troublesome, and the extra polishing work increases the product cost, making it impossible to expect the purpose of product manufacturing at a low price.

[0007] There are various problems such as.

[0008]

[Problems to be solved by the device]

 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, a large number of crushing blades are installed at intervals between the cutting blades. By mounting so that the crushing blade surface is located on the outside of the gold, the structure is simple and the entire circular saw can be made lightweight, and at the same time when the cutting blade is polished, the crushing blade can be used at the same time. The purpose is to provide a circular saw.

[0009]

[Means for Solving the Problems]

 Means of the present invention for achieving the above-mentioned object are composed of a disk-shaped base metal and cutting blades respectively attached to a plurality of first blade parts engraved at predetermined intervals on the periphery of the base metal. In this circular saw, a second blade having a vertical receiving surface and a horizontal receiving surface which are engraved at intervals in the blade is provided, and a lower surface of the second blade is supported on the horizontal receiving surface. The vertical saw surface is brought into contact with the locking notch, and the grinding saw has a grinding blade that projects from the outside of the base metal and forms a grinding blade surface that opposes the rotation direction of the circular saw. is there.

[0010]

[Action]

 The circular saw of the present invention configured as described above has the following operation. When this circular saw is fixed to a drive shaft of a woodworking machine and is rotated at a predetermined speed, when material is supplied to this circular saw, the material is cut by a cutting blade to a desired size and at the same time, A crushing blade protruding outward from the base metal cuts into the material of the cutting allowance, and at the same time, it is crushed into powder dust while cutting.

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

[0012]

【Example】

 Next, an embodiment of a circular saw according to the present invention will be described with reference to the drawings. In each figure, A is a circular saw used in a circular saw machine for woodworking, etc., and a large number of first blades 2 are provided at predetermined intervals on the periphery of a metal base 1 having a predetermined thickness. , 2 ... are engraved, and 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.

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

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

As shown in FIGS. 4 and 5, this second blade part 4 is composed of 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 engaging 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 side surface of the base metal 1. The crushing blade surface 5b protruding from the outer side and formed on the upper edge is attached so as to oppose the rotating 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 is applied, 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 a woodworking machine, and 7 is a slit for radiating cutting heat generated during cutting.

[0017]

[Effect of the device]

 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 provided at a plurality of intervals in the first blade of the circular saw, and the second blade. The lower surface of the blade is supported by the horizontal receiving surface, and the vertical receiving surface is brought into contact with the locking notch to project from the outside of the base metal to form a crushing blade surface that 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 and As shown in the figure, the installation and removal of the double structure is not required, and the number of steps and the work cost therefor are significantly reduced, and the overall weight of the circular saw is also light, which prevents overloading the drive shaft. Therefore, the saw core is prevented from swinging due to this, and high-precision cutting is possible. Can.

Since the blade edges of the cutting blade and the crushing blade are formed in series on the periphery of the base metal of the circular saw, the polishing of each blade edge can be performed by the same blade polishing machine, so that polishing work 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.

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

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

[Explanation of sign]

 1 Metal 2 First blade 3 Cutting blade A Circular saw 4 Second blade 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 respectively attached to a plurality of first blades engraved 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 that are engraved at intervals, and the 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.