JPS5926410B2 - Manual saw upper grain simultaneous polishing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manual saw upper grain simultaneous polishing machine that simultaneously grinds and polishes the upper grain of one blade group of a manual saw consisting of two blade groups using a rotary body having a disc-shaped grindstone connected to it. .

On a hand saw, alternately cut one side and the other as shown in Figure 6.
One blade group A, the other blade group B, and the upper cut C1, each having a blade portion on the other surface, are formed uniformly, and the upper cut of each individual cut is formed as shown in the opening of Fig. 7. It is necessary that the polishing angles H are the same.

In other words, in the process of manufacturing a hand saw, the process of forming the upper cut C1 is the most important step that determines the quality of the hand saw, but conventionally, the process of forming the upper cut C1 is the most important step that determines the quality of the hand saw.
This method is done manually by sequentially grinding and polishing each blade with a file, etc., which is complicated and requires a lot of effort and time, and this method may also cause grinding errors. However, it was not possible to form a uniform groove on the cutting edge, which is a condition for a hand saw to have a certain sharpness, and there was a risk of producing an inferior product.

In the present invention, all of the top grains of one group of blades of a hand saw can be polished in one step without requiring manual work, and a high quality hand saw can be manufactured in a short time. The aim is to provide the opportunity.

The present invention will be explained below based on the drawings.

Reference numeral 1 in Figures 1 to 3 is a rotating body, which is installed horizontally so as to be rotatable in forward and reverse directions. , a disc-shaped grindstone 6 having a polishing body 5 containing abrasive grains such as diamond attached to the peripheral edge thereof is connected.

The inclination angle G of the same plane tip of the polishing body 5 is determined according to the desired cutting edge angle F of the hand saw, and the number of polishing bodies 5 and the interval between them are determined by keeping the number of blades the same and alternating the blade forming surfaces. The number of blades is the same as that of one blade group of a hand saw consisting of two blade groups A and B, which are different in number, and the blades are spaced at the same spacing.

Reference numerals 7a and 7b are saw fixing bases, and the upper part is for holding the saw so that the blade surface of the saw is parallel to the rotary body 1 and deviated downward with respect to the horizontal direction including the center line of the rotary body. By adjusting the moving distance of the hand saw fixing vise 8a and 8b to the rotating body 1 of the rivet fixing table at the lower rear end and the protruding amount of the screw tip, the amount of polishing for "upper grain polishing" can be adjusted. Polishing adjustment screw 9a for adjusting.

9b, and is configured to be movable back and forth with respect to the rotating body 1 on rails 10a and 10b provided horizontally on both sides of the rotating body 10.

In the present invention having the above structure, as shown in FIG. 7A, the saw blade in which the upper grain D' of the two blade groups A and H is rough cut and has not yet been precisely ground and polished is shown in FIG. In order to polish the upper grain to have the required polishing angle H, first, in the first step, the manual saw 11 is placed on the saw fixing table I.
After fixing one blade group A on the top surface with the hand saw fixing vise 8a with the blade surface parallel to the rotary body 1, rotate the rotary body 1 in the normal direction and set the disc-shaped grindstone 60. A polishing body 5 that is attached to the edge and includes polishing abrasive grains such as diamond and has an inclination angle G corresponding to a desired cutting edge angle F in advance, and one blade group of the rivet fixing table 7a that has been moved on the rail 10a. The upper grain is brought into rotational contact with the upper grain at a position offset downward with respect to the center of the disc-shaped grindstone 6 to polish the upper grain.

(FIG. 8) At this time, the external blade groups B are located within respective intervals of the polishing body 5, and do not come into rotational contact with each other.

Further, since the distance at which the rivet fixing base 7a can face the rotating body 1 is adjusted by bringing the tip of the polishing adjustment screw 9a into contact with the machine base fixing piece, the hand saw 11 will not be over-polished. .

Next, in the second step, the other blade group B is placed on the opposite side of the fixing base 7b, and after fixing with the hand saw fixing vise 8b with the blade surface parallel to the rotating body 1, the rotating body After moving in the direction, the rotary body 1 is rotated in the opposite direction to polish the top surface of the blade group B which is operated by an external force in the same manner.

As described above, according to the present invention, by alternately grinding one side of a hand saw using a rotary body connected to a disc grindstone, the upper grain of one blade group can be simultaneously formed, unlike the conventional method. , it is possible to do the upper grain layer, which required a lot of time and effort, in a short time with a simple operation, and it is possible to increase work efficiency. A uniform upper grain and cut can be formed for both groups,
It is possible to manufacture a high-quality hand saw that is suitable for mass production and has excellent sharpness.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the hand-drawn saw blade simultaneous polishing machine of the present invention;
The figure is a left side view of the hand saw upper grain simultaneous polishing machine shown in Figure 1, Figure 3 is a front view of the hand saw upper grain simultaneous polishing machine also shown in Figure 1, and Figure 4 shows a disc-shaped grindstone. FIG. 5 is an enlarged front view showing the connected state of the disc-shaped grindstone shown in FIG. 4, FIG. 6 is a reference diagram showing the correspondence state of the saw blade and the disc-shaped grindstone,
Figure 1A is a schematic side sectional view showing the top grain condition of the saw blade before being polished by the manual saw upper grain simultaneous polishing machine of the present invention, and Figure 7 shows the manual saw upper grain simultaneous polisher of the present invention. FIG. 8 is a schematic side sectional view showing the upper grain of the saw blade polished by the grinder, and FIG. . 1...Rotating body, 2...Shaft, total
...Flange, 4...Double nut, 5.
... Polishing body, 6 ... Grindstone, 7a, 7
b...Tack fixing base, 8a, 8b...Vise for fixing hand saw, 9 a y 9 b...Polishing adjustment screw, 10a, 1 ob... ...Rail, 11
...Hand saw.

Claims (1)

[Claims] 1 A disk-shaped grindstone 6 having an inclination angle corresponding to the blade edge angle of the hand saw at the tip of the peripheral surface is alternately used on one side and on the other side to generate a single force of a hand saw consisting of two groups of blades having a blade portion on the other side. The number of blades in the blade group is equal to the number of blades connected at the same interval, and can be rotated in forward and reverse directions, and
A rotating body 1 provided horizontally, rails 10a and 10b provided horizontally on both sides of the rotating body 1, and a pair of opposing rails movable in the direction of the rotating body via the rails 10a and 10b. Saw fixing bases 7a and 7b and the saw fixing base 7a
, 7b, for fixing the hand saw with the blade surface of the hand saw parallel to the rotating body and deviated downward with respect to a horizontal plane including the center line of the rotating body. forces 8a, ab, and the saw fixing bases 7a, 7b.
A polishing adjustment screw 9a and 79b for adjusting the moving distance of the saw fixing base to the rotating body 1 are respectively provided in the hand saw, and the hand saw is polished one side at a time alternately.