JPH0452001Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a guide to a saw chain that can be attached to a chain saw used for felling or cutting timber, or a lawn mower used for cutting down weeds and shrubs. The present invention relates to a guide plate for a saw chain, and is particularly characterized in that it is not necessarily necessary to supply lubricating oil.

[Conventional technology]

As shown in FIG. 6, the chain saw 1 is composed of a chain saw body 2, a saw chain 3 that is driven by an internal combustion engine or the like provided in the chain saw body 2, and a guide plate 4 that guides the saw chain 3. The saw chain 3 is driven along the outer peripheral end surface of the guide plate 4.

Conventionally, the guide plate 4 has been constructed as shown in FIG. That is, the guide plate 4 has both outer plates 5 and a middle plate 6 integrally formed by adhesion, spot welding, etc., and a saw chain guide groove 7 is provided on the outer peripheral surface, and the saw chain 3 is guided by the saw chain guide groove 7. It was constructed so that it would not come off.

The conventional guide plate 4 is subjected to heat treatment such as carburizing and induction hardening to impart wear resistance, but since it is used under high pressure, it is necessary to supply lubricating oil.

That is, among the places where the guide plate 4 and the saw chain 3 come into contact, the place where the force applied in the normal direction to the contact surface is large is the end face 5a of both outer plates 5, which receives the force due to the tension of the saw chain 3. However, the coefficient of friction at the end face 5a was extremely large. Therefore, unless lubricating oil is supplied between the saw chain 3 and the guide plate 4 to reduce the coefficient of friction at the end surfaces 5a of both outer plates 5, the wear and heat generation of the guide plate 4 and the saw chain 3 will be significant, and the guide plate will suffer. 4 and Sochien 3 were damaged, and there was a risk of serious damage that would threaten the lives of the users.

For this reason, the conventional chain saw 1 requires a lubricating oil supply means, such as an oil tank or an oil pump, which makes it impossible to make the chain saw smaller and lighter, and increases costs. However, it has the disadvantage that it requires a lot of effort to replenish the lubricating oil, and it also costs money to purchase the lubricating oil. Furthermore, if the oil pump or the like breaks down, or if the user forgets to replenish the lubricating oil, the above-mentioned serious damage may occur, and there are also problems in terms of reliability and safety.

Incidentally, the same drawbacks as the above-mentioned conventional chain saw 1 have occurred in mowers and the like that use a saw chain.

[Problem that the invention attempts to solve]

The present invention eliminates the drawbacks of the above-mentioned conventional technology, and does not necessarily require the supply of lubricating oil, making chain saws and lawn mowers smaller and lighter, reducing costs, eliminating trouble and expense during use, and improving reliability. The aim is to provide a guide board for Sochien that enables improved safety and safety.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has a configuration in which recesses and protrusions are alternately formed on the end faces of both sides of the saw chain guide groove, and ceramics are sprayed onto the recesses.

[Effect]

In the present invention, as in the past, among the parts that come into contact with the saw chain, the places where the force applied in the normal direction to the contact surface is large are the end faces on both sides of the saw chain guide groove, which receive the force due to the tension of the saw chain. be. However, according to the present invention, since ceramics are disposed intermittently on the end face,
The coefficient of friction of the end face is significantly reduced, and as a result, there is almost no wear and heat generation of the guide plate and the saw chain even without supplying lubricating oil. Therefore, according to the present invention, it is not necessarily necessary to supply lubricating oil.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

1 to 3, reference numeral 10 denotes a guide plate of the present invention, which in this embodiment is constructed as a guide plate for a chain saw. The guide plate 10 has both outer plates 11 and a middle plate 12 integrally formed by adhesion, spot welding, etc., as in the conventional case.
A saw chain guide groove 13 is provided on the outer peripheral surface, and the saw chain 3 is guided by the saw chain guide groove 13 so that it does not come off. In addition, in FIG. 1, 14 is a spot weld.

Incidentally, instead of configuring both the outer plates 11 and the middle plate 12 in one piece, a relatively thick single plate may be used and the saw chain guide groove 13 may be formed on the outer peripheral surface of the plate by grooving. .

In the present invention, the saw chain guide groove 1
Concave portions 15 and convex portions 16 are alternately formed on the end faces of both sides of 3, and ceramics 17 are sprayed onto the concave portions 15.

In the case of the embodiment shown in FIGS. 1 to 3, since the structure uses both the outer plates 11 and the middle plate 12 as described above, the both outer plates 11 form the both sides of the saw chain guide groove 13, and the both outer plates 11 and the middle plate 12 are used. Recesses 15 and protrusions 16 are alternately formed on the end surface of the outer panel 11, and ceramics 17 are sprayed onto the recesses 15, and the surfaces of the ceramics 17 are approximately flush with the surfaces of the protrusions 16. It is like that. In addition, the above-mentioned concave part 15 and convex part 1
6 may be constructed by, for example, removing the periphery of both outer plates 11 intermittently by press working.

Note that the shape and number of the recesses 15 and protrusions 16 are not limited, and can be changed as appropriate.

In addition, in Fig. 1, 18 is a long hole for attaching the saw chain 3 to the chain saw body, which also serves as tension adjustment.
Reference numeral 19 is a positioning hole for integrating both the outer plates 11 and the middle plate 12. Further, 20 is a supply hole for supplying lubricating oil from an oil tank and an oil pump mounted on the chain saw body to the saw chain guide groove 13 and the like. However, in the present invention, it is not necessary to supply lubricating oil, so the supply hole 20 does not need to be provided. That is, the supply hole 20 is provided as necessary when attempting to further reduce wear and heat generation of the guide plate 10 and saw chain 3 as described later.

In the present invention having the above-mentioned structure, as in the conventional case, among the parts that come into contact with the saw chain 3, the parts where the force applied in the normal direction to the contact surface is large are the parts of the saw chain 3.
These are the end faces of both outer panels 11 that receive force due to the tension of the outer panels 11. However, according to the present invention, since the ceramics 17 are disposed intermittently on the end face, the coefficient of friction on the end face becomes extremely small, and as a result, the guide plate 10 and the saw chain can be easily connected to each other without supplying lubricating oil. No. 3 has almost no wear and heat generation. Therefore, according to the present invention, there is no need to necessarily supply lubricating oil.

According to the present invention, there is no need to supply lubricating oil, so there is no need to provide lubricating oil supply means such as an oil tank or an oil pump to the chain saw, making the chain saw smaller and lighter. It is possible to reduce costs, eliminate trouble and expense during use, and improve reliability and safety.

Note that if lubricating oil is supplied in the same manner as in the past, wear and heat generation of the guide plate 10 and the saw chain 3 can be further reduced. Furthermore, if the ceramic 17 is impregnated with oil or coated with Teflon, the wear and heat generation of the guide plate 10 and the saw chain 3 can be further reduced. In particular, it is desirable to apply the Teflon coating as it also serves as reinforcement for the ceramics 17.

FIG. 4 shows another embodiment of the present invention, in which the same components as in the embodiment of FIGS. 1 to 3 are given the same reference numerals, and their explanation will be omitted.

In the case of this embodiment, the guide plate 21 has a substantially circular shape as shown in FIG. 4, and is configured as a guide plate for a lawn mower. That is, a lawn mower is usually equipped with a disc-shaped cutting blade at the tip and is configured to be rotated by an internal combustion engine or the like, but a guide plate 21 shown in FIG. 4 is installed. For example, the mower is configured such that the disc-shaped cutting blade can be removed and a saw chain drive sprocket and attachment can be attached to that part,
The guide plate 21 shown in FIG. 4 is adapted to be attached to the above-mentioned attachment.

In addition, in FIG. 4, reference numeral 22 is a long hole for attaching to the above-mentioned attachment, which also serves as tension adjustment of the saw chain, and is constructed in the same manner as the long hole for attaching 18 shown in FIG. 3 above. It can also be attached to a chain saw.
In addition, 23 is a supply hole for supplying lubricating oil from the oil tank and oil pump mounted on the main body;
24 is a middle plate 12 for causing the lubricating oil supplied to the supply hole 23 to flow out into the saw chain guide groove 13, etc.
This is an outflow hole provided in the The fact that the supply hole 23 and the outflow hole 24 are provided as necessary when trying to further reduce the wear and heat generation of the guide plate 21 and the saw chain 3 is that the supply hole 23 and the outflow hole 24 are provided as necessary when trying to further reduce the wear and heat generation of the guide plate 21 and the saw chain 3. It is the same as 20. In particular, since grass cutters are not normally provided with an oil tank or the like, the supply hole 23 and the outflow hole 24 are often meaningless. However, the guide plate 2 shown in the fourth diagram
1 can also be attached to a chain saw, in which case the supply hole 23 and the outflow hole 24 can be effectively utilized. In addition, in Figure 4,
25 is a punched portion for weight reduction.

FIG. 5 shows another embodiment of the present invention, and the same components as those in the embodiments in FIGS. 1 to 3 and the embodiment in FIG.

The guide plate 26 of this embodiment is also configured as a guide plate for a mower, similar to the guide plate 21 shown in the fourth figure.

The difference between the guide plate 26 shown in FIG. 5 and the guide plate 21 shown in FIG. 4 is the structure for supplying lubricating oil. That is, the guide plate 2 shown in FIG.
6, instead of the supply hole 23 and the outflow hole 24 shown in FIG. The outer panel 11 is further provided with an injection hole 29 that communicates with the grease tank punching portion 27. In the case shown in FIG. 5, a nipple 30 having a check valve structure is screwed into the injection hole 29.

Therefore, according to the guide plate 26 shown in FIG.
If semi-fixed grease is injected into the punched part 27 for the grease tank, the temperature will rise due to friction with the saw chain and reach a predetermined temperature (for example, 40°C to 50°C).
℃), the grease becomes liquid and flows out through the outflow hole 28 into the saw chain guide groove 13, etc.
Abrasion and heat generation of the guide plate 26 and the saw chain 3 are further reduced. Therefore, the guide plate 26 shown in FIG. 5 has the advantage that wear and heat generation can be further reduced even if the main body is not equipped with an oil tank or the like. However, the punching part 27 for the grease tank and the outflow hole 2
The supply hole 20 and injection hole 29 shown in the first diagram above are provided as necessary to further reduce wear and heat generation of the guide plate 26 and saw chain 3. This is similar to the supply hole 23 and the outflow hole 24 shown in FIG.

In the case of the guide plate 26 shown in FIG. It is constructed in one piece using a method called "Cutper Blazing" developed by the applicant.

[Effect of idea]

According to the present invention, since it is not necessary to supply lubricating oil, it is possible to make the chain saw smaller, lighter, reduce costs, eliminate trouble and expense during use, and improve reliability and safety. It is possible to obtain the desired effect.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is an enlarged view of the main parts, Fig. 3 is a sectional view taken along line A-A in Fig. 5 is a front view showing still another embodiment, FIG. 6 is a front view showing a conventional chain saw, and FIG. 7 is a longitudinal sectional view of a guide plate thereof. 10, 21, 26...information board, 15...recess,
16...Protrusion, 17...Ceramics.

Claims (1)

[Scope of utility model registration request] 1. A saw chain guide plate, characterized in that recesses and protrusions are alternately formed on the end faces of both sides of a saw chain guide groove, and ceramics are sprayed onto the recesses.