JPH0518086Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a saw chain guide plate for a chainsaw.

BACKGROUND OF THE INVENTION Chain saws are generally used under harsh working conditions, where the saw chain guide plate, especially the curved end of the saw chain and the parts near it, are susceptible to wear due to contact with the saw chain or hard objects such as trees and rocks. There is a need for measures to prevent wear of these parts. In contrast, with conventional chainsaws,
A hard metal frame member is fitted over the entire curved end of the guide plate, and the frame member is welded and fixed to the guide plate base, or a rotatable roller or sprocket is provided to prevent wear. I'm trying to prevent it.

Problems to be Solved by the Invention However, such conventional techniques require the use of a large amount of expensive wear-resistant materials, the production of guide plates is expensive, and the frame members are made of hard metal. This has the disadvantage that the welded part to the guide plate may peel off.

Therefore, the present invention has been devised to eliminate the drawbacks of the conventional technology as described above. To provide a saw chain guide plate for a chainsaw that has an extremely long life.

Means for Solving the Problems According to the present invention, the saw chain guide plates of a chainsaw are arranged at narrow intervals at least in the peripheral portion of the curved tip portion, and the spacing increases as the distance from the curved tip portion increases. The present invention is characterized in that dovetail groove-shaped recesses are formed, and a ceramic material having a shape that complements the recesses is fixed and disposed in each of the recesses.

Function Therefore, the saw chain guide plate of the chainsaw according to the present invention has an appropriate number of recesses formed in the peripheral portion of the guide plate that requires reinforcement according to the necessity, and each of these recesses is provided with a material having excellent wear resistance. Since the ceramic material is fixedly disposed, the ceramic material is firmly fixed to the guide plate, and the usage cost of the ceramic material can be reduced.

Embodiments Next, the present invention will be described based on embodiments shown in the drawings.

First, in the embodiment of the present invention shown in FIGS. 1, 2, and 3, the saw chain guide plate 1 of the chainsaw is made of a metal material similar to the metal material normally used for the saw chain guide plate of a conventional chainsaw. It is made of. However, in the peripheral portion 3 of the curved end portion 2 of the saw chain guide plate 1 of this embodiment, and the peripheral portions 6 and 7 of both upper and lower flat portions 4 and 5 that are continuous therewith, a large number of dovetail groove-shaped recesses 8 are mutually arranged in the circumferential direction. are formed separately. The dovetail groove-shaped recesses 8 are arranged at narrow intervals in the curved end portion 2 where wear resistance is most required, and as they move away from the upper and lower flat portions 4 and 5 where the degree of wear is lower than that. They are placed with increased spacing. Each dovetail groove-shaped recess 8 is preferably formed in a shape having a tip width of about 2 to 3 mm and a depth of about 4 to 5 mm.
are formed simultaneously by press working. A ceramic material 9 previously formed into a complementary shape is fitted into each of the dovetail groove-shaped recesses 8 thus formed and fixed by adhesive.

The ceramic material 9 arranged and fixed in the dovetail groove-shaped recess 8 on the periphery of the guide plate 1 will fall off when the guide plate 1 hits a hard object such as a tree or rock during work. You don't have to worry about it getting wet.

Effects of the invention With the structure of the invention explained above, the invention has the following effects:
In the peripheral area of the guide plate that requires wear resistance, narrowly spaced groove-like recesses are formed, and groove-like recesses are formed with the intervals increasing in the direction away from the curved end portion where the degree of wear is low. However, since a ceramic material with a complementary shape is fixed to each of the recesses, the wear resistance of the saw chain guide plate can be uniformly balanced throughout the saw chain guide plate, and the ceramic material is fixed in the dovetail groove-shaped recess. The ceramic material that has been developed can prevent it from falling off even if it hits a hard object such as a tree or rock, and the amount of ceramic material used can be minimized.
In addition to preventing the ceramic material from peeling off and falling off, the production of the wear-resistant guide plate is simple and inexpensive, and furthermore, the ceramic material can be impregnated with lubricating oil to enable oil-free operation of the chainsaw. play.

[Brief explanation of the drawing]

FIG. 1 is a side view of essential parts showing an embodiment of the saw chain guide plate of a chainsaw according to the present invention, FIG.
FIG. 4 is an enlarged view of the main part of the figure, and FIG. 4 is an enlarged perspective view of the ceramic material. DESCRIPTION OF SYMBOLS 1... Saw chain guide plate, 2... Curved tip portion, 3... Surrounding portion, 8... Concave portion, 9... Ceramic material.

Claims (1)

[Scope of utility model registration request] In the chainsaw saw chain guide board,
An appropriate number of dovetail groove-shaped recesses 8 are arranged at narrow intervals at least in the peripheral portion 3 of the curved tip portion 2 of the guide plate, and the spacing increases as the distance from the curved tip portion increases. A saw chain guide plate for a chainsaw, characterized in that a ceramic material 9 having a shape that complements the concave portions is fixedly disposed in each of the concave portions.