JPS6043283B2 - Break-fucking- - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a break saw that simultaneously cuts the cutting waste generated during wood cutting into a pulverized state.

When trimming is performed by cutting the end face of plywood, particle board, gypsum board, etc. into a fixed position using a cutting machine such as a double sizer or tenoner, selvage waste is discharged together with the product in the form of a long and narrow member, making it troublesome to dispose of this selvage waste. Therefore, a break saw is used that cuts the product with a circular saw (tipped saw) and crushes the shavings at the same time, but the present invention is particularly suitable for use in cutting the above-mentioned plate. A break saw is a combination of a cutting tip saw and a breaking tip saw, but the conventional breaking tip saw is structurally complex and requires a large number of machining operations and parts, making it expensive. It becomes expensive.

In addition, the break saw itself is complicated, making it heavy and unsuitable for high-speed cutting.Re-sharpening of the crushing blade is time-consuming and requires skill. Since the number of break saws is small, a large saw may act during crushing, affecting the cut surface of the product and damaging the product.Since the break width is constant, it is necessary to prepare several types of expensive break saws in advance. There were inconveniences such as being hot and uneconomical. The break saw of this invention utilizes a known normal tip saw for the cutting tip saw, and the breaking tip saw has a shape that is almost the same as a normal tip saw, making it extremely advantageous in terms of structure and handling. An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the break saw of the present invention includes a cutting tip saw 1 and a breaking tip saw 2, a round flange 3 for a spacer, and a push saw. 4
, and are constructed by overlapping each other via J such as the split fittings 5.

As shown in FIG. 1, the tipped saw for cutting 1 uses a known tipped saw to protrude from the outer periphery of a disc-shaped base metal 11 with a blade 12 having a carbide tip brazed thereon. A mounting hole 13 is provided, and a plurality of positioning pin holes 14 are provided on the outer periphery of the mounting hole 13. Next, the break tipped saw 2 uses the same well-known tipped saw as its main body, and as shown in FIG.
At the same time, a mounting hole 23 is provided in the center of the base metal 21, and a positioning pin hole 2 is provided on the outer periphery of this mounting hole 23.
4 are provided at the same pitch as the cutting tip saw 1.

Then, in the middle position of the base metal 21, there are several round holes 2 with a slightly large diameter.
5 are bored at equal intervals, and cuts 26 are provided by cutting the base metal 21 radially from each round hole 25 toward the blade pocket of the blade body 22 on the outer periphery. Further, bolt holes 27 are drilled on both sides of each cut 26 near the outer periphery of the base metal 21. next,
In FIG. 3, 3 is a round branch for a spacer, which is formed into a ring-shaped disk, and this round flange 3 has a mounting hole 3.
1 is the mounting hole 1 of the chip saw 1 and 2 for cutting and breaking
3 and 23, and a plurality of positioning knock pin holes 32 are further formed on the outer periphery of the mounting hole 31, and knock pins 33 are press-fitted into the knock pin holes 32.
This dowel pin 33 has 2 to 3 WL on both sides of the round flange 3.
1Tr1. Press-fit something long enough to protrude. The thickness of the round flange 3 is set to a predetermined thickness depending on the break width. Incidentally, a bittern 34 is provided on the inner peripheral side of both sides of the round flange 3. Next, 4 is a ring-shaped bush whose outer diameter is 1 for cutting and breaking.
, 2 and the round flange 3 to fit correctly into the mounting holes 13, 23, 31 of the round flange 3.

The inner diameter of this bush 4 is bored to match the shaft diameter of the drive shaft of the machine used, and the thickness of the bush 4 is equal to the thickness of the three pieces of alloys 11 and 21 of the cutting and breaking tip saws 1 and 2 and the round flange 3. Slightly smaller than the total thickness of ! Same (a)
．． 1 to 0.5771, Irri,). Furthermore, 5 is a split metal fitting, which is formed into an oblong or fan-shaped flat plate, and has a plurality of screw holes 51 extending through the front and back surfaces. The thickness of this dividing metal fitting 5 is formed to a predetermined thickness depending on the specifications of the crushing width! has been done. The respective members are assembled in the following order.

(1) Cut 26 on the base metal 21 of the tipped saw 2 for breaking
・Forcibly twist the split 1 metal fitting 5 from the round hole 25.
are inserted and fixed with countersunk screws 52 from both sides of the base metal 21.

(2) Each cut 26 of the base metal 21 is twisted in the same direction and the split fitting 5 is inserted.

(3) Insert the bush 4 into the mounting hole 31 on the inner diameter of the round flange 3, fit the cutting saw 1 to one side of the round flange 3 by fitting the bush 4, and attach the base metal 21 to the other side. A chipped break saw 2 twisted at multiple locations (2 to 6 locations depending on the outside diameter of the chipped saw or the workpiece material) is fitted into the bit 4 by aligning the knock pin 33 with the pinhole 24 and integrated into the break saw 10. Configure.

(4) Cutting chip saw 1 and breaking chip saw 2
When overlapping and integrating the chips through the round flange 3, the blade body 22 of the twisted base metal 21 of the breaking chip saw 2 is brought close to the blade body 12 of the cutting chip saw 1 so as to overlap in the rotational direction at first. Then, install the blade in the direction in which the blade opens outward.

In this way, the integrated break saw 10 is attached to the drive shaft of the machine to be used, and is fixed by the flange of the machine to cut the material and crush cutting ears (ear scraps). Since the width of the cut edge scraps is not constant, the crushing width that meets each of the specifications can be arbitrarily set by changing the thickness of the dividing metal fitting 5. For example, when breaking a wide piece of ear waste, the width can be easily increased by increasing the thickness of the dividing metal fitting 5, increasing the amount of twist of the base metal 21, and widening the twist width between the blade body 22 and the blade body. Can break wide ears. However, when changing the width, the thickness of the round flange 3 for the spacer should be increased proportionally. The present invention has the following advantages due to the above configuration.

The cutting tipped saw 1 and the breaking tipped saw 2 can be manufactured at low cost and are economical because they can be used by using a generally commercially known tipped saw with only some additional processing.

The width for the break can be arbitrarily set by changing the thickness of the split fitting 5 and the round flange 3. The re-sharpening of the blade body 22 of the break tip saw 2 can be easily performed. By removing the split metal fitting 5 from the base metal 21 when re-sharpening, the elastic force of the base metal 21 causes the base metal 21 to return to its original twist, so that it can be re-sharpened under the same conditions as when re-sharpening a general tipped saw. It is efficient because it can be done. Since the entire break saw 10 can be made lightweight, it can be used for high-speed rotation and is easy to install and remove. The main bodies of the cutting tipped saw 1 and the breaking tipped saw 2 do not need to be manufactured in different right and left-handed versions, and can be freely made into right-handed or left-handed ones depending on the direction in which the base metal 21 is twisted. can.
However, special consideration should be given to the countersink of the bolt 27. Since the number of blade bodies 22 of the chipped saw 2 for breaking can be increased, the crushing blades work finely and effectively, so that the product can be easily broken and the cut surface of the product is not damaged.

[Brief explanation of the drawing]

FIG. 1 is a side view of the break saw of the present invention viewed from the side of the cutting tip saw, FIG. 2 is a side view of the break saw seen from the side of the breaking tip saw, and FIG. 3 is a front sectional view taken along the line A--A in FIG. In the figure, 1 is a tip saw for cutting, 2 is a tip saw for breaking, 3 is a round flange, 4 is a bush, 5 is a dividing metal fitting, 11 and 21 are base metals, 12 and 22 are blade bodies, 13, 23,
31 is a mounting hole, 14 and 24 are pin holes, 25 is a round hole,
26 is a cut, 27 is a bolt hole, 32 is a knock pin hole, 3
3 indicates a dowel pin, and 34 indicates a bittern.

Claims (1)

[Claims] 1. In a break saw in which a cutting tip saw is integrally fixed with a breaking tip saw via a spacer, the breaking tip saw has a blade protruding from the outer periphery of a flat base metal, and a plurality of blades are provided at intermediate positions of the base metal. Round holes are drilled at equal intervals, and cuts are made radially from each round hole toward the blade bag of the outer blade body, and plate-shaped split fittings are inserted into these cuts, and split fittings are made. The blade is twisted against the elasticity of the base metal, and each half of the front and back sides are overlapped with the base metal and fixed with screws to form a twisted blade body. Breaksaw to do.