JPS6337146Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a cutting edge polishing device for a saw blade chain used in a chain saw.

(Prior Art) FIG. 4 is a partial front view of a saw blade chain for a chain saw.

In the figure, reference numeral 1 indicates a chain main body, and reference numeral 2 indicates cutter links attached to the chain main body 1 at regular intervals.

The cutter link 2 includes a flat main part 4 which is riveted 3 to the chain main body 1, a depth gauge 5 integrally formed in the front part of the main part 4, and a depth gauge 5 which is offset laterally from the plane of the main part 4. the shank portion 6 and the shank portion 6
A cutting edge 8 that extends continuously from the top surface of the tip 7 to the outer surface of the shank portion 6 obliquely polishes the part. It is formed by twisting.

By the way, as described above, due to the form of the cutter link 2 constituting the saw blade chain, the cutting blade 8 whose sharpness has deteriorated is polished by applying a bar-shaped rotary grindstone to the cutting edge part. However, since this work is usually done manually, it relies heavily on the intuition of the operator, requiring an extremely high level of skill, and is time-consuming due to the need for caution. Polishing tends to cause unevenness in the amount of polishing or the polishing angle, and furthermore, there are problems such as the use period being shortened by polishing more than necessary.

(Purpose of the invention) This invention was made in view of the above points, and it combines a guide fixed to the rotating grindstone, and by using this guide, it is possible to achieve accurate polishing in a short time for a chain saw. The present invention aims to provide a cutting edge polishing device.

(Structure of the invention) Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1 is an exploded perspective view showing the main parts of this invention, and FIG. 2 is a perspective view of the same assembled state.

In the figure, reference numeral 9 is a holder serving as a gripping portion equipped with a small motor inside, and 10 is a chuck connected to a motor shaft and protruding from the tip of the holder, to which a bar-shaped grindstone 11 is detachably fixed.

Reference numeral 12 denotes a mounting portion formed on a cylindrical peripheral surface eccentrically provided to the chuck 10 at the tip of the holder from which the chuck 10 projects, and 13 represents a guide body attached to the mounting portion 12, which is movable in position in the circumferential direction of the mounting portion. an annular body portion 14 that is wrapped around and fixed by a stopper 15;
A contact plate 16 extends parallel to the grindstone 11 from the ring body 14 on both sides of the grindstone, and a connecting portion 17 connects the tips of the contact plates on both sides and has a long hole 18 facing toward the grindstone. It becomes more. Reference numeral 19 denotes a grindstone guide attached to the inside of the connecting portion 17 so as to face the grindstone 11, and has a guide rod 20 having approximately the same diameter as the grindstone 11, and a mounting screw provided eccentrically to the guide rod 20 on its base end surface. A set screw 22 is screwed into the hole 21 through the elongated hole 18 and attached to the connecting portion 17 .

In the figure, reference numeral 23 denotes a guideline provided on the surface of the plate, which is used to set the inclination angle of the grindstone 11 so as to match the longitudinal direction of the chain during polishing work.

(effect) Next, the operation of the above configuration will be explained.

Fix the saw blade chain to be sharpened in an upright position.

Loosen the stopper 15, place the backing plate 16 of the guide body 13 horizontally on the chain main body 11, and rotate the holder 9. The position of the grindstone 11 relative to the backing plate 16 will change, so that the grinding wheel 11 will be in the right position. When the cutting edge portion 2 matches the regular polishing position, the stopper 15 is tightened to fix the guide body 13.

Next, loosen the set screw 22 of the guide rod 19,
The set screw 22 is tightened so that the guide rod 20 is exactly aligned with the grindstone 11 on the same axis.

After completing the above preparation work, the polishing work is carried out.

The motor is started, the contact plate 16 of the guide body 13 is placed on the chain body 1, and the guide rod 20 is first applied to the cutting edge portion of the cutter link 2 to be polished.

After determining the polishing angle in this manner, the polishing is performed by sliding the polishing tool onto the rotating whetstone 11. When this polishing is completed, it is again slid onto the guide rod 20 and separated from the cutting edge portion.

In this polishing operation, it is preferable to slide the cutting edge portion between the guide rod 20 and the grindstone 11 multiple times and polish it in small increments.

FIGS. 3a and 3b are explanatory diagrams showing the polishing procedure of this invention.

Since the cutting rings 2 are distributed alternately to the left and right sides of the chain main body 1, after polishing one side of the cutting blades 8 whose inclinations are in the same direction, the holder 9 is changed and the other cutting blade 8 is polished.

(Effects of the invention) As explained above, this invention places the contact plates that are placed on the chain to be polished on both sides of the bar-shaped grindstone, places them on the main body of the chain, and uses the contact plates as a reference to grind the bar-shaped grindstone. In addition, the bar-shaped grindstone is provided with a guide rod having approximately the same diameter as the bar-shaped grindstone in a butt-shape on the same axis, and the polishing operation is performed by sliding the bar-shaped grindstone onto the grindstone from this guide rod.
The setting of the polishing angle and the amount of force applied to the whetstone during polishing can be finely adjusted, allowing all cutter links to be sharpened evenly with the minimum amount of polishing necessary, and without the need for skillful polishing work. It has excellent effects such as being able to be easily and efficiently carried out by anyone.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of the main parts of this invention, Figure 2 is a perspective view of the same assembled state, and Figures 3 a and b.
4 is a diagram illustrating the polishing procedure, and FIG. 4 is a partial front view of the saw blade chain. 1... Chain main body, 2... Katsuta link, 3...
...Joining part, 4...Main part, 5...Depth gauge, 6...
...Shank part, 7... Tip part, 8... Cutting edge, 9...
...Holder, 10...Chuck, 11...Bar-shaped grindstone, 12...Mounting part, 13...Guide body, 14
... Ring body part, 15 ... Stopper, 16 ... Plate, 17
... Connecting portion, 18 ... Long hole, 19 ... Grindstone guide, 20 ... Guide rod, 21 ... Screw hole, 22 ...
...Set screw, 23...Guideline.

Claims (1)

[Scope of utility model registration request] A holder serving as a gripping part, a chuck connected to a motor shaft installed in the holder and protruding from the tip of the holder, a bar-shaped grindstone detachably fixed to the chuck, and provided eccentrically to the chuck at the tip of the holder, A mounting part formed on the cylindrical peripheral surface, a ring part wrapped around the mounting part and fixed by a stopper, and a plate extending from the ring part parallel to the grindstone on both sides of the grindstone. a grindstone guide having a guide body, and a guide rod fixed to the tip of the contact plate of the guide body by a stopper, facing the grindstone, and fixed on the same axis as the grindstone at a free position. A cutting blade polishing device for a chain saw.