JPH0340567Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a tip saw that can be used for breaking or cutting grooves.

Prior Art When cutting a plate-shaped object such as plywood to a certain width, if the edges are cut off long, they will become long and bulky, making post-processing troublesome. Therefore, it is considered to crush them at the same time as cutting and collect them with a dust collector. ing. There is a break saw as a chip saw that can shatter in this way, but the applicant previously proposed in 1983 that an ordinary chip saw could be used as a break saw.
-There is No. 43283.

This tool has a flat base metal with a blade on its outer periphery, and has a plurality of round holes drilled at equal intervals in the middle, and cuts are made radially from the round holes toward the bottom of the blade. Insert the split metal fitting, twist the split metal fitting against the elasticity of the base metal, overlap each half of the front and back sides of the split metal fitting with the base metal, fix with screws, and twist the blade body into a single chip saw. It is composed of.

Problems to be solved by the invention The proposed method forcibly twists the base metal at the radial cut, requiring strong force, making it difficult to insert the split fitting. Also, since it was twisted on both sides, it was impossible to use it in a way where it was twisted on one side. Furthermore, in order to change the crushing width of the ear scraps, even if the dividing metal fittings were changed, the change could only be made a very small amount, and there was a limit to the size.

Means for Solving the Problem A hole 4 is bored at approximately the center of the radius at equiangular positions in a disc-shaped base metal 1 having a plurality of blades 2 arranged at equal intervals on the outer circumference, and a circular Circumferential cuts 5 in the form of circular arcs that gradually move away from the center in the circumferential direction are provided in the same direction up to the next hole 4, and from the bottom of the blade corresponding to the end position of the circumferential cuts 5 toward the center of the base metal. A radial cut 6 is provided, and the radial cut 6 is connected to the circumferential cut 5 by a crank-shaped cut 7 to form an elastic deformation portion 1a that changes the cutting edge position in the axial direction of the base metal. The blades 10d on both sides in the radial direction fitted in the space 7a formed by the crank-shaped cut 7 are supported by the base metal 1, and are inserted and fixed to the back side of the portion formed by the crank-shaped cut 7 to provide the elasticity. A split fitting 10 is provided for displacing the deformable portion 1a in the axial direction.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. A large number of blade bodies 2 are formed at equal intervals on the outer circumference of the base metal 1, and chips 3 are brazed to each blade body 2. In this example, the base metal 1 is divided into several angles. In this example, the round hole 4 is bored at approximately 1/2 the radius from the center at 5 equal angle positions, and in this example, at a position slightly outside of the center. An arc-shaped circumferential cut 5 that gradually moves away from the center in the same circumferential direction from the center of each of the round holes 4 is formed to be long until this side of the adjacent round hole 4. A radial cut 6 is formed from the blade bottom 2a corresponding to the end of the circumferential cut 5 toward the center in the radial direction, and a crank-shaped cut 7 is formed between the cuts 5 and 6 and protrudes in the circumferential direction. This crank-shaped cut 7 is connected to the circumferential cut 5 and the radial cut 6 by a small arc, thereby creating an elastically deformable portion 1a that is cantilevered by a series of cuts. A hole 8 for a set screw is bored in the center of the crank-shaped portion 7b. The split fitting 10 for twisting the base metal part 1a, which can be deformed by the cuts in this way, has a shape that is inserted into the space 7a formed by the crank cut 7 at the base of the base metal part 1a. At the same time, a groove 10a having a width that fits into the base metal part 1a for being held in the radial direction is formed on both wings 10.
It has been removed at d. A surface 10 of the elastically deformable base metal portion 1a that comes into contact with the back surface of the crank portion 7b
b is formed to have a thickness that allows the base metal portion 1a to be twisted by the necessary amount, and the contact surface 10b is formed as an inclined surface that becomes thinner toward the center, and a screw hole 10c is formed at a position corresponding to the set screw hole 8. is engraved. The split fitting 10 is located in the crank-shaped space 7 at the base of the base metal portion 1a.
After being inserted into the portion a, it is fixed to the crank portion 7b with a set screw 9. At this time, the contact surface of the crank portion 7b is slightly twisted so as to be pressed against the inclined surface 10b. Therefore, the spring action prevents the set screw 9 from loosening, and the split fitting 10 and the set screw 9 fix the cut ends together to maintain the rigidity of the elastically deformable portion. Furthermore, the crank-shaped notch 7 is made longer (Fig. 1, 7'), and the hole 8 of the crank part 7b is also made into a long hole in the circumferential direction (the first
8'), the split metal fitting 10 can be adjusted in the circumferential direction, and the amount of twisting can be adjusted by changing the length from the base of the elastic deformation part.

Function When using this chip saw as a break saw, the base metal 1, in which the elastic deformation portion 1a is formed by continuously forming cuts 5, 7, and 6, is divided by opening the crank portion 7b of the base metal portion 1a. Prepare the tip saw 1 with the metal fitting 10 inserted and fixed with the setscrew 9, and use the tip saw 21 for normal cutting and the spacer 2.
2. Insert into the rotary shaft 23 of the tip saw 1 and circular saw machine one after another and fix with nuts. After being assembled as a break saw, the tip cut by the tip saw 21 by driving the rotating shaft 23 is cut by the cutting blade displaced in the direction of the rotating shaft of the deformed base metal part 1a of the breaking tip saw 1. Finely ground. When the cutting time becomes longer and the cutting blade needs to be re-sharpened, the tip saw is removed from the rotary shaft 23. The break tip saw 1 is extracted by loosening the setscrew 9 and the split fitting 10 is removed. Split fitting 1
The base metal part 1a, which has been deformed by 0, returns to its original position before elastic deformation, that is, as a single base metal, due to its own elasticity. The piece restored to a single base metal in this way is re-sharpened in the same way as the chip saw 21. When the repolishing is completed, the split fitting 10 is attached and fixed to the rotating shaft 23 in the same manner. If the ear flap is changed, the thickness of the split metal fittings 10 is selected in accordance with the change. Further, in the case where the crank portion 7b is lengthened, fine adjustment is made by moving the split fitting 10 in the circumferential direction.

Furthermore, in the case where the tip 3 is not used as a break saw but is used as a grooving tip saw, the cutting edge of the tip 3 protrudes from both sides of the base metal, an even number of elastically deformable parts 1a are formed, and the split fitting 10 is By alternately positioning the contact surfaces with the crank portion 7b on both sides and deforming them alternately on both sides, it is possible to obtain a groove cutting chip saw that can cut a desired groove width.

Effects As detailed above, the present invention creates a long circumferential cut at approximately the center of the base metal in the radial direction, and forms a cut that continues to the bottom of the blade through the crank part, thereby creating a long elastic deformation section in the circumferential direction. A plurality of split metal fittings are formed at equal angle positions, and the elastic deformation part is twisted by intervening block-shaped split fittings, so it can be twisted with a very small force, making it easy to insert and remove the split fittings. . Therefore, it is possible to easily replace the split fittings to change the crushing width of the ear scraps without requiring much time. For those with a longer crank part, the cutting width can be adjusted by sliding the split metal fitting in the circumferential direction, and if the metal is twisted in the same direction, one side of the base metal will remain almost flat even if the amount of displacement is changed. Spacer 22
It can be combined with the chipsaw 21 without replacing the parts. Furthermore, by making the cutting blade of the chip protrude from both sides, it can be used as a grooving saw that can be twisted alternately to both sides to adjust the cutting width. (A saw that cuts grooves by fixing it at a slight angle to the rotating shaft) does not create an arc-shaped surface, resulting in a beautiful cut surface.

[Brief explanation of the drawing]

Figure 1 is a plan view of the chipsaw of the present invention, Figure 2 is a vertical cross-sectional view when combined with a chipsaw as a break saw, Figure 3 is a diagram of the dividing metal fittings, and A is a plan view. View C is a BB view of A. 1... base metal, 1a... base metal part of elastic deformation part,
5, 6, 7... cut, 7b... crank part, 10
...Divided metal fitting, 10a...groove, 10d...wing part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Holes are drilled at approximately the center of the radius at equal angular positions in a disc-shaped base metal with a plurality of blades provided at equal intervals on the outer circumference, and from this hole the circumferential Make circumferential cuts of circular arcs that gradually move away from the center in the same direction until just before the next hole, and make radial cuts from the bottom of the blade corresponding to the end point of the circumferential cuts toward the center of the base metal. A crank-shaped cut is provided to connect the radial cut and the circumferential cut, an elastic deformable portion is cut out by the cut and changes the cutting edge position in the axial direction of the base, and the crank-shaped It is fitted into the space formed by the cut and is supported by the base metal by the blades on both sides in the radial direction, and is inserted and fixed to the back side of the part formed by the crank-shaped cut to cause the elastic deformation part to rotate in an axial direction. A chipsaw characterized in that it is provided with a split metal fitting that can be twisted, and the position of the cutting edge can be displaced in the axial direction by twisting the elastic deformation part. (2) The chip saw according to claim 1, wherein the dividing metal fitting has a contact surface with the elastic deformation portion formed to be inclined in the radial direction. (3) The chipsaw according to claim 1 or 2, in which the crank-shaped cut is formed long in the circumferential direction and the dividing metal fittings can be positioned in the circumferential direction.