JP2516512B2 - Saw and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel saw for cutting wood and a method for manufacturing the same.

[0002]

2. Description of the Related Art Wooden furniture and articles such as various tables, chairs and chests are indispensable for our daily lives. Most of these are made of wood, and saws are still an indispensable tool for woodworking, because in general decoration work, wood boards must be cut more accurately according to their dimensions.

Conventionally, saws for cutting trees as shown in FIGS. 7 to 10 have been known. 7, a plurality of saw teeth A1, A2, A3, A4 ... Are provided on the lower edge of the saw plate A. These saw teeth A1, A2, A3, A4 ...
The triangle is formed, and both side portions of the triangle are formed with inclined surfaces from the outside to the inside of the saw plate A at a very small angle. Moreover, the inclined surface forming directions of the saw teeth on both sides are opposite to each other. For example, saw tooth A1 in FIG.
And the inclined surface of A3 is on the invisible side of the back side of the figure, and A2
It is on the side where you can see A4. Since this type of saw plate A has the same thickness from the top to the bottom, there is a space for preventing lifting of the wood B and stocking sawdust (so-called woodchip).

Therefore, as shown in FIGS. 9 and 10, a saw-tooth passage must be provided. Further, as shown in FIGS. 9 and 10, two sets of saw teeth (A1, A3 ...) And (A2, A4 ...) facing each other are bent in mutually opposite directions, and the saw teeth tips of the saw plate A are arranged. The portion is processed to be thin so that a passage is provided, but the sawteeth do not bend straight into a dogleg shape, but form an arc. As a result, since this type of saw is not sharpened and the resistance is increased, extra cutting force and time are used during use, the cutting surface B1 is also not flat, and the saw teeth become dull and cannot be cut.

[0005]

In view of such a point,
Separate saws have been proposed as shown in Figures 11-14. As shown in FIGS. 13 and 14, the saw plate C of this saw is polished so that the upper portion becomes thinner, and the lower portion gradually becomes thicker. Further, these saw teeth C1 also have a substantially triangular shape, and both side portions of the triangular shape are processed so as to form inclined surfaces C11, C12 with an inclination angle from the outside to the inside of the saw plate C. Further, since the inclination angle is significantly larger than the inclination angle formed on the saw plate A by the thickness of the saw plate C, a traverse line C14 ... Is formed at the intersection of the inclined surfaces C11 and C12, and Saw plate C with triangular tip
12 from the bottom to the top, and is polished at an angle of inclination, as shown in FIG.
The saw is made more sharp by forming a substantially regular triangular inclined surface C13 as shown in FIG. The saws shown in FIGS. 11 to 14 are superior to the saws shown in FIGS. 7 to 10 in the following points. 1. There is no need to bend to create a passage. 2. The sharpness requires less cutting power and less time. 3. It is possible to flatten the cut surface D1 of the wood.

This type of saw plate C is
Although having the above-mentioned advantages, what has been found out through the applicant's long-term research and measurement test is that the saw plate C can cut smoothly and neatly when the weft fibers of the wood are cut. However, when the cutting direction and the growth direction of the fibers of the wood are the same direction (that is, a vertical saw), it is difficult for the structure of the saw blade itself to cut the fibers parallel to the saw plate. Is impossible to cut, or already cut long fibers get entangled between the saw blades to create a considerable resistance, achieving this type of saw blade with the desired effect in longitudinal cutting It was impossible to make it possible, it took extra cutting power and time, and the cutting surface was also uneven. In order to improve this, there is already a slightly improved design (Republic of China Patent No. 138865, 142611, 16).
Although various improved saws described in Nos. 5926 and 166217) have been proposed, these conventional saws still have a problem that they are insufficient and not ideal.

A main object of the present invention is to provide a saw having special saw teeth in a part of the general saw teeth, and a method for manufacturing the saw, especially a saw for both vertical and horizontal saws.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a saw plate in which one edge side of the metal plate material is thickened and the other edge side thereof is thinned, and a large number of substantially triangular shapes are formed on the thick one edge side of the saw plate. The saw teeth are formed, and the inclined surfaces are formed on both sides of these saw teeth such that adjacent saw teeth have a trapezoidal cross section and an inverted trapezoidal cross section, respectively, and these saw teeth are divided into general saw teeth and special saw teeth. Then, the general saw teeth are arranged in an appropriate order, and the inclined surfaces on both sides are intersected by a traverse line, and the tips of the saw teeth of the traverse line are cut to form a substantially straight line.
The special saw tooth is formed by forming a rectangular inclined surface, and the inclined surfaces on both sides are intersected with each other at the tips of the saw teeth, and a vertical cutting surface having an appropriate depth toward the tooth root from the tip of one inclined surface is formed. The saw is characterized in that a small triangular inclined surface is formed by obliquely cutting the other inclined surface toward the rear side from the saw tooth tip.

[0009]

[Function] Since the cutting edge surface of the special saw teeth is perpendicular to the split saw direction, it is possible to easily cut the fibers in the vertical direction during vertical sawing and the position of this cutting edge surface. Due to the characteristics, it is possible to discharge the sawdust in each sawtooth gap more efficiently, further reducing the cutting time,
In addition, the cut surface of wood is made smoother.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of a main part of a saw according to the present invention, and 10 is a saw plate. As shown in FIGS. 2 and 3, the saw plate 10 has a taper such that the upper portion is thin and the lower blade edge thickens. The saw plate 10 is provided with the conventionally known general saw teeth 11 of FIGS. 11 to 14 and the special saw teeth 12 of the present invention in a predetermined arrangement.

First, referring to FIG. 5, a method of manufacturing the general sawtooth 11 portion of FIGS. 11 to 14 from a raw material will be described. Figure 5
(A) shows the shape of the raw material of the saw portion, and this material is a metal material having a constant thickness. In FIG. 5B, the both side surfaces are polished, the thickness is gradually increased from the upper side to the lower side, and the cross section is trapezoidal. The virtual line represents the contour line before polishing. FIG. 5C shows the shape after cutting out the sawteeth. FIG. 5 (d) shows the shape after the formation of the substantially regular triangular inclined surface C11 by cutting the lower end of each saw tooth upward from below the side of the saw tooth C to form the inclination angle in the most acoustic manner. Is represented.

Next, the method of manufacturing the saw according to the present invention is as follows. Fig. 5 shows the polishing of the raw material and its both sides.
As shown in (a) and (b), the saw plate 10 is molded so that the blade portion side is thick. Next, FIG. 6 (e) (f) (g) (h)
It is formed by the process shown in. Step 1: The elongated saw plate 10 is cut to form a triangular saw tooth 11 as shown in FIG. 6 (e) and a special saw tooth 12 having a wider width and a substantially trapezoidal shape, and arranged at a predetermined interval and order. To do. Specifically, two general saw teeth 11 and one special saw tooth 12 are arranged in this order. The width of the special sawteeth 12 is set to be slightly larger than that of the general sawteeth 11, but the dimension thereof can be appropriately set according to the thickness of the saw plate and other requirements. Step 2: Both sides of each sawtooth portion 11 and 12 are arranged in a predetermined order.
Also, the blades are alternately polished in different directions to form a serrated side edge with a sharp bevel. Of these, the general sawteeth 11 are shown in FIG.
The state is shown in. Both sides of the special saw tooth 12 are shown in FIG. 6 (f).
The inclined blades 121 and 122 are formed as described above, but the plane of the tooth top is left. In fact, modern grinding machines are sufficiently advanced that the steps 1 and 2 can also be directly completed by primary grinding.

Step 3: The general sawteeth 11 are processed by a well-known method to obtain the state shown in FIG. 5 (d). Each special saw blade 1
In the case of No. 2, one side close to the oblique blade 121, that is, one side effective as a saw tooth is directed from the tooth tip toward the root direction, and vertical polishing with an appropriate depth is performed to form a special vertical cutting surface 123. The state shown in FIG. Step 4: Special saw teeth 12 having the above vertical cutting surface 123
From the top end of the bevel blade 122 on the other side, that is, from the back side of the vertical cutting face 123, slightly lower than that, and further beveled at an appropriate angle toward the rear face, and its conventional tooth top plane, The outside cutting angle is ground to form the inclined surface 124, and the state as shown in FIG. Thus, the processing of the special saw teeth 12 according to the present invention is completed. At this time, the difference between the general saw tooth 11 and the special saw tooth 12 is that when viewed from the front of the saw plate, the latter has a special type saw tooth, and this special type saw tooth is close to a triangle, but one side thereof. Means that there is an inverted “L” -shaped notched vertical cutting surface 123 (FIG. 2), and the tooth tip of the other side has a triangular inclined surface 124 that is inclined rearward (FIG. 3). .

In other words, the saw manufacturing method of the present invention includes the following steps. (1) Grinding both sides of a metal plate material of a certain thickness to form a saw plate with a gradually increasing thickness. (2) Cutting the thick edge of this saw plate to form a substantially triangular shape. And, create a large number of saw teeth that intersect with the trapezoid at intervals, and (3) direct both side edges of each triangular saw tooth from the outside to the inside of the saw plate to form inclined surfaces at appropriate inclination angles. Then, the inclined surfaces of both sides of the same sawteeth are intersected with each other at the traverse line, and adjacent sawteeth are formed with the inclined surfaces on different side surfaces of the saw plate. (4) A general saw tooth is obtained by polishing the triangular tips of a large number of saw teeth to form an inclined surface that forms a substantially regular triangle.

As a method for obtaining a special saw tooth, both sides of the sawtooth portion having the above-mentioned trapezoidal shape are ground to be oblique blades, and the following processing is performed. (5) In the inclined blade portion on one side of the saw tooth, the vertical grinding is performed to an appropriate depth from the tooth tip toward the root direction to form a cutting edge surface perpendicular to the plate surface of the saw plate. (6) Further, on the other side of the saw blade, the beveled surface is made backward from the tooth tip of the saw tooth, and the bevel is slightly lowered, and a small triangular inclination is provided on the back side of the cutting surface. Form a surface.

The saw 10 produced by the saw manufacturing method of the present invention is clearly shown in FIGS. FIG.
In this saw 10, special saw teeth 12 are inserted and installed at equal intervals between a large number of general saw teeth 11, and the shape of the general saw teeth 11 is similar to that of the saw teeth C1 in FIGS. 12 and 13. What is different is a special saw tooth 12, and on one side of the inclined blade surface 121, from the tip to the root direction, vertical grinding is performed to an appropriate depth. At the lower end of this inclined blade surface 121, the saw plate 10 and the vertical cutting blade are provided. The surface 123 (shown in FIGS. 1 and 2) is formed, and the oblique blade surface 122 on the other side is inclined grinding from the front to the rear of the apex of the saw-tooth tip to form a small 3
A rectangular ramp 124 (shown in FIGS. 1 and 3) is obtained.

In FIG. 4, such a design was originally
The sawdust accumulated in the space 14 between the saw teeth 11 is removed by the saw plate 10.
During the cutting operation of the cutting edge surface 123 more thoroughly and efficiently
Since it is extracted and removed by, it is possible to reduce much resistance. When the sawing direction and the wood fiber are in the same direction (for example, when cutting a plywood, there are fibers that intersect in the vertical and horizontal directions), the tip edge of the cutting surface 123 is even more The longitudinal fibers of the wood in the space 14 can be effectively cut. It also greatly reduces the resistance, so that compared to known saws, the cutting surface of wood is also finer and smoother with less cutting force and less time.

When the present invention is actually applied, the special saw teeth can be arbitrarily inserted and installed between the general saw teeth, and the saw teeth are not necessarily limited to equidistant installation. . Generally speaking, the tooth tip of the special saw tooth 12 is made lower than that of the general saw tooth 11 to achieve the effect of front cutting and back cutting,
And it is possible to maintain the fine smoothness of the wood surface. In addition, when considering a special saw tooth, the tip of the saw is nearly half polished to form a tip having an inverted “L” -shaped notch saw tooth, and the saw tooth strength is likely to be reduced. After widening the root to form the tooth (that is, widening the tooth width) and polishing it to make it a special saw tooth, if you make the tip width of the blade edge close to that of a general type, It is possible to increase the cutting utility of longitudinally oriented fibers by means of saw teeth to achieve the effect of longitudinal cutting.

[0019]

As described above, the present invention can provide a saw that can expect a sufficiently small cutting force and a short cutting time, and can cut and cut the cut surface of wood more smoothly. Further, compared with a known saw, the saw is more effective for both vertical and horizontal use.

[Brief description of drawings]

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

FIG. 2 is a right side view of the special saw tooth of FIG.

3 is a left side view of the special saw tooth of FIG. 1. FIG.

4 is a sectional view of the saw of FIG. 1 in use.

FIG. 5 is a work process diagram of a method for manufacturing a general sawtooth portion.

FIG. 6 is a work process diagram of a method for manufacturing a special sawtooth portion.

FIG. 7 is a perspective view of a main part of a conventional saw.

8 is a partially enlarged front view of the saw of FIG.

9 is a side view of a single saw tooth of the saw of FIG. 7. FIG.

10 is a partial cross-sectional view of the saw of FIG. 7 in use.

FIG. 11 is a perspective view of a main part of another conventional saw.

12 is a partially enlarged front view of the saw of FIG.

FIG. 13 is a side view of a single saw tooth of the saw of FIG.

14 is a partial cross-sectional view of the saw of FIG. 11 in use.

[Explanation of symbols]

A ... saw plate, A1, A2, A3, A4 ... saw teeth, B ... wood,
B1 ... Cutting surface, C ... Saw plate, C1 ... Saw teeth, C11, C12
... Inclined surface, C14 ... Twill line, C13 ... Substantially regular triangular inclined surface,
10 ... Saw plate, 11 ... General saw tooth, 12 ... Special saw tooth, 12
1, 122 ... oblique blade, 123 ... vertical cutting edge surface, 124 ... inclined surface.

Claims (4)

(57) [Claims] 1. A saw plate in which one edge side of a metal plate material is thickened and the other edge side is thinned, and a large number of substantially triangular saw teeth are formed on the thick one edge side of the saw plate. Forming inclined surfaces on both sides of the sawteeth such that adjacent sawteeth have trapezoidal cross sections and inverted trapezoidal cross sections, and divide these sawteeth into general sawtooth and special sawtooth and arrange them in an appropriate order. The general sawteeth are formed by intersecting inclined surfaces on both sides with a traverse line and cutting the sawtooth tips of the traverse lines to form an approximately regular triangular inclined surface. Cross the inclined surfaces of the saw teeth at the tip of the saw tooth, form a vertical cutting surface with an appropriate depth toward the tooth root from the tip of one of the inclined surfaces, and slope the other inclined surface toward the rear side of the saw tooth tip. A saw characterized in that it is formed by forming a small triangular slanted surface by performing facing cutting. 2. The saw according to claim 1, wherein the special saw teeth are provided at equal intervals between the general saw teeth. 3. The saw according to claim 1, wherein the distance between the special saw teeth is wider than that of the general saw teeth. 4. A metal plate material having a constant thickness is polished on both sides,
Increasing the thickness little by little to form a saw blade, cutting the saw teeth of the next array between the trapezoids with a large number of substantially triangular shapes at the thick edge of the saw blade, and cutting the saw teeth of each triangle. The both sides are directed from the outer side to the inner side of the sawtooth plate with an appropriate inclination angle to form inclined surfaces, and the inclined surfaces on the both sides of the same sawteeth are intersected by a traverse line, and adjacent sawteeth are formed. On the different side surfaces of the saw plate, a step of performing the above-mentioned processing, a step of cutting the tips of each triangular saw tooth to form an inclined surface that approximates a regular triangle, and forming a normal saw tooth, Numbers are inserted into a regular saw tooth at a predetermined interval, and both sides of a trapezoidal saw tooth processed through the same step as the saw tooth cutting step are ground to form a beveled blade, and one side of the beveled blade surface is directed from the tooth tip toward the root of the tooth. , Make a vertical cut with an appropriate depth to form the cutting surface of the vertical saw plate surface, In addition, a step of forming a small triangular slanted surface on the back side of the cutting edge surface to form a special sawtooth by obliquely cutting from the sawtooth tip toward the rear side. Manufacturing method.