JPS618301A - Circular saw - 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 (Field of Industrial Application) The present invention relates to a circular saw for mowing grass, forestry, woodworking, stone cutting, etc., which is attached to a rotating shaft body. These include those with serrations made separately from the saw blade, and diamond-shaped ones.

It had saw teeth (cutting blades) of various shapes formed around it, and was attached to the tip of the rotating shaft body using bolts and nuts.

(Problem that the invention aims to solve) When conventional circular saws get hot, they become weak and vibrate a lot (this point applies to all circular saws).When used for mowing grass, the cutting edge hits the ground. As I cut through the soil, I hit a rock that was slightly above the ground surface, producing sparks. Circular saws with serrations (cutting blades) are not suitable for use with circular saws, as the blade will be severely damaged so that it will not cut quickly, and pebbles, etc. will directly hit the serrations (cutting blades), causing the pebbles to fly off and be very dangerous to the operator. As a result of protruding objects such as nuts coming into contact with the work area, they may become buried in the soil and become difficult to move on soft ground, or they may hit stones on the ground surface, causing the circular saw to become unsteady. It moved up and down, causing uneven cutting.

Furthermore, there is a risk of damage to the protruding parts, so if you constantly use the mower, it will put weight on your shoulders (mowing the undergrowth of a mountain forest is no exception). The vibrations are strong and the weight is added to the shoulders, causing severe fatigue for the worker.

(Means for Solving the Problems) In view of the above points, the present invention has been developed to provide a structure in which a portion located outwardly from the central portion corresponding to the attachment portion to the rotating shaft main body, as shown in FIG. 1, FIG. 2, and FIG. This feature is characterized by having a hole in the center in a range from those that slope upward from the horizontal to those that slope downward from the horizontal, thereby eliminating the drawback. This is formed by press working, spatula pressing, etc. in the process of forming a circular saw, and various conventionally known and publicly used saw teeth (cutting blades) are formed on the outer periphery. (This sawtooth has a tip whose sawtooth or cutting edge is separate from the saw blade.Includes 7 diamonds as well.) It is a modified version of -8526.

(Function) As shown in the working diagram of the present invention in Figure 2A, if a circular saw is used for a lawn mower, the outside of the central part, which corresponds to the attachment part to the rotating shaft body, is inclined upward from the horizontal. It can reduce the possibility of certain pebbles etc. hitting the saw teeth (cutting blade), and since it is taut, it won't go sluggish even when the circular saw gets hot during use, and there is little vibration, so your hands won't get numb. Also, there is no need to lift the circular saw, so you can cut easily.

The saw blade can be made separately, and a whelk can be used to reduce the chance of the chip being hit by pebbles on the ground, so the chips will last longer.

(The larger the angle of inclination, the more effective the effect will be.) If the upward inclination angle (a) is set close to 6, the cutting blade will rotate on a very close plane, making it possible to cut the grass as short as possible. Therefore, it is suitable for use on a flat surface with little debris, and conversely, when the upward inclination angle Tdl is large, the sawtooth (cutting blade) can be made as unlikely to hit pebbles or the like as possible.

It has the same effect when used for clearing undergrowth in mountain forests.

Next, as shown in Figure 4A, when using a lawn mower with the outer side of the central part, which corresponds to the attachment part to the rotating shaft body, inclined below horizontal, it is narrow. use This is also taut, so it won't go bad even when the circular saw gets hot, and the cutting edge points downwards, so if it doesn't cut anymore, you can rub it against stone or concrete and it will snap back to life. Good results cannot be obtained unless it is a water wheel, but one with an inclination angle of α-゛α'-0゛ may be used.

(Example) Below are three diagrams illustrating the inclined state of a circular saw according to the present invention.
This will be explained in detail using two embodiments. The one shown in FIG. 2 has a hole 1 in the center, and a portion G outward from a central portion a of the attachment portion to the rotating shaft body is inclined upward from a midway portion E with respect to the horizontal line CP. This angle of inclination α is selected depending on the type of circular saw, the situation of the place of use, and the purpose of the operator, but it is practical to set it in the range of approximately 0° to 900IX. As shown in Fig. 8A, the blade tilted upward from the horizontal is used for mowing grass or mowing the undergrowth of a mountain forest. The one shown in Figure 1 is a conventional 8-blade blade, but the blade is not limited to this, and can be used for mowing grass or mowing the undergrowth of mountains and forests.

This is applied to all circular saws (including tips made separately from the saw blade), but those with an inclination angle close to α-θ'' are used for woodworking (regardless of whether the saw blade and sawtooth are separate and integrated). The application is also applied to diamond holes for use, and is not limited to mowing grass.In the case shown in Fig. 4, the hole 1 is opened in the center, and the hole 1 is located outward from the center part a, which corresponds to the attachment part with the rotating shaft main body. The part of the saw is inclined downward from the middle part E with respect to the horizontal line CP.This inclination angle d' will be selected depending on the situation of the type of circular saw and the purpose of the operator. It is practical to set the angle in the range of approximately 0° to 90°.Those tilted below the horizontal are used for mowing grass in narrow grooves.Figure 48 shows a mower attached to a mower. This is carried out on all circular saws used for mowing grass, both integrated and separate types, and the 24-0
Items similar to @ are also used for woodworking and river stone cutting, and are not limited to grass cutting. The one shown in FIG. 3 has a hole 1 in the center and does not tilt the part outside the central part a corresponding to the attachment part to the rotating shaft main body along the horizontal line.

(This is based on Article 79 of the Patent Law) This is selected and used depending on the type of circular saw, the place of use, and the purpose of the worker. The one shown in FIG. 6 has four blades, the one shown in FIG. 6 has three blades, and the one shown in FIG. 7 has two blades. These are circular saws used for mowing grass, but as shown in Figure 2, the outer part of the central part, which corresponds to the attachment part to the rotating shaft body, is tilted upward from the horizontal. As shown in FIG. 4, the outer portion of the center portion corresponding to the attachment portion to the rotating shaft body is inclined downward from the horizontal. The one shown in Figure 5 has four blades for forward and reverse rotation; the front side is the lower blade, and when turned over, it becomes the upper blade. This is also carried out as shown in Figures 2, 3, and 4. The one shown in Fig. 8 is a saw blade, the one shown in Fig. 9 is a circular saw in which a chip 4 made separately from the saw blade 2 is used for the saw blade 3, and the one shown in Fig. 10 is a saw blade. The woodworking cutter shown in Fig. 11 has a dime V-shaped cutter with a slight upward slope and a downward slope.

As with long saws, there are generally various types of saws for woodworking, such as vertical teeth, horizontal teeth, and diagonal teeth.

The diameter and material of the circular saw vary depending on the purpose, such as vertical and horizontal cutting, differences in cutting conditions, and other purposes; to enable smooth sawing, easy cutting, and smooth sawing.
Irrespective of the presence or absence of differences in the shape and dimensions of the tooth profile, the thickness of the saw blade, and whether the saw blade and saw tooth are integrated or separate, a so-called 'set angle' (tooth swing) is generally attached. There is. In some cases, there are no clams.

Those with an upward inclination angle of α-00 and a downward inclination angle of α'-〇° are circular saws for mowing, woodworking, forestry, and stone printing, regardless of whether the blade and saw blade are integrated or separate. It is used for all circular saws, regardless of shape, combination, material, etc.

It goes without saying that modifications and applications derived from the above embodiments are included in the technical idea of the present invention.

(Effect of the invention) By tilting the outside of the central part, which corresponds to the attachment part to the rotating shaft main body, upward from the horizontal, it can be used for mowing grass or cutting down the undergrowth of a mountain forest. The circular saw does not go sluggish even when heated, and there is little vibration, so your hands won't get numb and you can cut easily, and the durability of the saw teeth or cutting edge against harsh working conditions is increased. It is clear that this not only made the circular saw last longer, but also increased the safety of the operator. Also, circular saws that face downward are mainly used horizontally because they generate heat. If you reverse the upward slope, it will slope downward.If necessary, new ceramics, stellite, or any other suitable ultra-hard material known to the public can be used for the sawtooth portion or the cutting edge portion.In short, the present invention is as described above. The present invention is not limited to the embodiments, and various design changes may be made within the scope of the claims.

[Brief explanation of drawings]

Figure 1 is a plan view of the wooden device (Figures 1A and 1B are also plan views of the wooden device) Figure 2 is a vertical sectional view of the invention Figure 3 is a longitudinal sectional view Figure 4 is a longitudinal sectional view of the invention Fig. 2A Fig. 3A Fig. 4A is a usage diagram □ Fig. 5 is a plan view of 4 blades (this is for forward and reverse rotation) Fig. 6 is a plan view of 3 blades Fig. 7 is a plan view of 2 blades Fig. 8 is a plan view of the saw blade Fig. 9 is a partially enlarged plan view of the tip Fig. 10 is a plan view of the wood cutter Fig. 11 is a plan view of the diamond saw 1... Hole 2...Saw blade 3...
・Sawtooth (cutting blade) 4...Chip a made separately from the sawblade...
...Attachment part to the rotating shaft body B...Outer part of the attachment part to the rotating shaft main body E...Midway part
←・・・Rotation direction〈・・・・Rotation direction CP・・・Horizontal line α・・・・・・Upward □Inclination angle (hedral angle) d′・・・・
・・・・・・Downward inclination angle (anhedral angle) Kise - large, 3'1! Ill! l (tton'1 2A figure, / 乍1八圀(d 1/i 151m JY figure! J II
Figure procedure amendment band (method) October 15, 1980 1, Indication of the case 1982 Patent Application No. 129624 2, Title of the invention Circular saw 3, Person making the amendment Relationship with the case Patent applicant 4, Amendment Date of order (shipment date) (2) Page 10 of the specification, 4, “Brief explanation of drawings”
1 is a plan view of the present invention (FIGS. 1A and 1B are also plan views of the present invention). 1'1.1, 1A, and 1B are plan views of the present invention. Accordingly, the phrase "one invention" in the fourth and sixth lines of the same is amended to "the present invention."

Claims (1)

[Claims] It is characterized by having a hole drilled in the center of the outer part of the center part corresponding to the attachment part to the rotating shaft body, ranging from one that slopes upward from the horizontal to one that slopes downward from the horizontal. A circular saw of all kinds.