JPH0535642B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a chainsaw, and particularly to an oil supply structure for supplying oil to a guide groove of a guide plate, a saw chain, etc.

(Prior Art) Conventionally, as shown in FIGS. 22a to 24, there is a saw chain of a chainsaw, etc., which is provided with a refueling port 132 on a guide plate 131 for refueling. That is, the fuel filler port 132 shown in FIGS. 22a and 22b is formed to penetrate straight through both rail portions 134 of the guide plate 131 so as to open into the guide groove 133 of the guide plate 131.
The oil filler port 132 in FIG. 3 obliquely passes through one rail portion 134, and its inner end opens on one side of the guide groove 133. Also, the fuel filler port 13 in Fig. 24
2 is a long groove 135 formed on the outer surface of one rail portion 134 of the guide plate 131 so as to extend in the width direction (vertical direction) thereof, and a long groove 135 formed to open into the guide groove 133 from one end of the long groove 135. It is composed of a passage hole 136.

In each of these oil supply ports 132, oil that is pumped from the chainsaw body is sent in the direction of the arrow and supplied into the guide groove 133.

In addition, as for the oil supply structure of other chainsaws, for example, Utility Application No. 138423 (1983)
No. 43101) discloses a structure in which an oil-impregnated body made of a porous material is provided at the opening of an oil supply path that opens into a guide groove, and the opening is not clogged with chips to provide good oil supply. , Also, Akira Jitsugane
Microfilm No. 51-109024 (Utility Model Application Publication No. 53-26586) discloses a configuration in which a sub-tank is provided in a portion of a chainsaw guide plate adjacent to an oil supply hole to connect a sufficient supply of oil.

(Problem to be Solved by the Invention) However, when oil is supplied in this manner, in the guide plate 131 shown in FIGS. 23 and 24, oil is sent into the guide groove 133 from one side thereof. Only. Therefore, this oil is
32 side rail part 134 inner surface and saw chain 1
37 and between the outer peripheral edge of the rail portion 134 on the side of the fuel filler port 132 and the side link 139 of the saw chain 137, but other parts, that is, the rail portion on the opposite side from the fuel filler port 132. 134 inner surface and saw chain 137
There is insufficient supply between the drive link 138 of the oil filler port 132 and the outer peripheral edge of the rail portion 134 on the opposite side from the oil filler port 132 and the side link 139 of the saw chain 137. Furthermore, in the guide plate 131 shown in FIGS. 22a and 22b, oil is supplied to the guide groove 133 from both sides, but in reality,
When the oil flows into the guide groove 133, it is also scooped up by the drive link 138 of the saw chain 137, and is not sufficiently supplied to the opposite side from the inlet side.

Furthermore, Utility Model Application No. 138423 (1983) and Utility Application No. 138423 (1983)
The configuration of the embodiment disclosed in Microfilm No. 109024 also has the same problem as the one shown in FIG. It had not been resolved.

(4) Page 5, lines 12 to 19, “The above problems...
It consists of '' has been corrected as follows: ``A guide groove is formed between a pair of rails provided on the outer peripheral edge of the guide plate body, and oil is fed into the guide groove through a pair of oil supply holes that open in the guide groove. In a chainsaw oil supply structure that supplies oil from both sides of a drive link that rotates, a passage hole that penetrates in the left and right direction is provided closer to the inner circumference than the bottom of the guide groove, and a passage hole is provided at both left and right outer ends of the passage hole. A pair of communication grooves are provided that communicate the opening and each outer end opening of the oil supply holes, and an oil supply path having a circumferential cross section that communicates with the guide groove by the oil supply holes, the passage hole, and both communication grooves is provided. This is an oil supply structure for a chainsaw, which is based on the above-mentioned features.

Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention includes a pair of rail parts provided on the outer peripheral edge of the guide plate main body, and a pair of rail parts formed between the two rail parts. a pair of oil supply holes that penetrate both rail parts from the outside and open into the guide groove, a passage hole that penetrates the guide plate body so as not to communicate with the guide groove, and an outer end opening of each oil supply hole. and a pair of communication grooves that communicate with both outer end openings of the passage hole.

(Operation) In the present invention, lubricating oil flows from the discharge port of the chainsaw main body into the guide groove from both sides of the drive link of the saw chain through the passage hole of the guide plate main body, each communication groove, and each oil supply hole. and,
This lubricating oil is sent to the entire guide plate body by the drive link of the running saw chain, and between both rails of the guide plate body and the side link.
It is also supplied between the inner surface of the guide groove and both side surfaces of the drive link.

(Example) Hereinafter, an example embodying this invention will be described in the first to
This will be explained according to Figure 4.

is a chainsaw main body, and a drive shaft 2 is provided on one side thereof. Reference numeral 3 denotes a power transmission sprocket attached to the drive shaft 2, which is used to transmit the power of the chainsaw main body 1 to a saw chain 9, which will be described later.

Reference numeral 4 designates a lubricating oil discharge port opened in front of the drive shaft 2 (to the right in FIG. 1) on the chainsaw main body 1, and 5 designates a pair of bolts located below the discharge port 4.

Reference numeral 6 denotes a guide plate body attached to the chainsaw body 1, which has a long hole 8 formed transparently at its base end.
By inserting the bolt 5 of the chainsaw body 1 into the chain saw body 1 and tightening the nut N, the chain saw body 1 is fixed so as to be adjustable in the front and rear positions. Note that this guide plate main body 6 is integrally formed as a whole.

13a and 13b are a pair of protector washers mounted between the base end of the guide plate main body 6 and the chainsaw main body 1 and on the outside of the base end of the guide plate main body 6. A hole 14 is provided in the protector washer 13a on the main body side at a position corresponding to the discharge port 4 of the chainsaw main body 1. Reference numeral 13c is a chain cover that is attached to the outer side of the protector washer 13b and also covers the sprocket 3.

In particular, as shown in FIG. 2, reference numeral 7 designates a guide groove recessed in the outer peripheral edge of the guide plate main body 6, and reference numeral 15 designates a pair of rail parts provided in the outer peripheral edge of the guide plate main body 6.

Reference numeral 9 denotes an endless saw chain movably mounted in the guide groove 7 of the guide plate main body 6, and is driven by the power of the chainsaw main body 1 via the sprocket 3. The saw chain 9 has a drive link 11 that is fitted into the guide groove 7 of the guide plate main body 6 and driven by the sprocket 3 of the chain saw main body 1.
and a side link 12. The side links 12 have blades 10 on their upper portions and are arranged at appropriate intervals. The drive link 11 supplies lubricating oil supplied from the discharge port 4 of the chainsaw body 1 to the entire guide groove 7 from both the front and back surfaces, thereby preventing seizing of the saw chain 9 and abrasion of the guide groove 7. This is to remove chips that get stuck at the bottom.

As shown in FIGS. 1 and 2, reference numeral 16 denotes a pair of upper and lower oil supply holes transparently provided at the base end of the guide plate main body 6, which are opened into the guide groove 7 from the outer surface of both sides of the rail portions 15. The rail portion 15
penetrates through. Note that this oil supply hole 16 is located on the guide plate main body 6 near the outer peripheral edge. Reference numeral 17 denotes a pair of upper and lower passage holes that are transparently provided at inner positions of the respective oil supply holes 16, and are formed to penetrate through the guide plate main body 6 in the plate thickness direction at positions that do not correspond to the guide grooves 7. ing. 18 is the same passage hole 1
A communication groove is formed on the outer surface of the guide plate main body 6 to allow each of the outer end openings 17a of the oil supply holes 6 and the outer end openings 16a of the oil supply holes 6 to communicate with each other. A portion of this communication groove 18 corresponds to the hole 14 of the one protector washer 13a.

Now, the operation of the chainsaw constructed as above will be explained.

Under normal working conditions, lubricating oil flows from the outlet 4 of the chainsaw body 1 to one of the protector washers 13.
The oil is supplied into the guide groove 7 from both sides of the drive link 11 of the saw chain 9 through the hole 14 of a, the passage hole 17 of the guide plate main body 6, each communication groove 18, and each oil supply hole 16. This lubricating oil is then sent to the entire guide plate body 6 by the drive link 11 of the saw chain 9 that is running. At this time, between the outer peripheral surface of both rail portions 15 of the guide plate main body 6 and the side link 12, between the inner surface of the guide groove 7 and both side surfaces of the drive link 11, and between the drive link 11 and the side link 12 of the saw chain 9. The connections are well lubricated. Further, since the passage hole 17 does not open into the guide groove 7, the passage hole 17 will not be clogged in the guide groove 7 by chips of wood or the like.

In this embodiment, oil is supplied from each oil supply hole 16 to both sides of the drive link 11 of the saw chain 9, and since the position of the oil supply hole 16 is near the outer peripheral edge of the guide plate main body 6, the oil supply was insufficient in the past. Between the inner surface of the rail portion 15 on the opposite side to the hot discharge port 4 and the drive link 11 of the saw chain 9, between the outer peripheral edge of the rail portion 15 on the opposite side to the discharge port 4 and the side link 12 of the saw chain 9, and The connecting portion between the drive link 11 and the side link 12 is also reliably supplied with oil. Therefore, wear of the saw chain 9, guide groove 7, and rail portion 15 can be prevented, and durability of the guide plate main body 6 and the saw chain 9 can be improved.

In addition, since the oil supply hole 16 passes straight through the rail portion 15 and completely crosses the drive link 11, the drive link 11 removes chips from wood etc. while running, and prevents chips from clogging. prevent. Therefore, it is not necessary to remove the guide plate main body 6 and the saw chain 9 from the chainsaw main body 1 and remove chips from the oil supply hole 16 frequently.

Furthermore, since a communication groove 18 extending vertically is provided on the outer surface of the guide plate main body 6 to form a long hole, the guide plate main body 6 of this embodiment can be used in various chainsaw main bodies 1 in which the vertical positions of the discharge ports 4 are different. be able to. That is, the hole 14 of the protector washer 13a can be provided at any position between the passage hole 17 and the oil supply hole 16.

In this embodiment, since the lubricating oil is supplied only from the passage hole 17 of the guide plate body 6, only one pump for pumping the lubricating oil needs to be provided in the chainsaw body 1.

In addition, in the chainsaw of this embodiment, when the mounting position of the guide plate main body 6 with respect to the chainsaw main body 1 is reversed vertically, the lower oil supply hole 16, passage hole 17, or communication groove 18 corresponds to the discharge port 4 of the chainsaw main body 1. .

The present invention is not limited to the embodiment described above, but for example, as shown in FIG.
may be formed by interposing a center plate 22 between a pair of side plates 21, and the outer peripheral edge between the side plates 21 may be used as the guide groove 7. In this case, compared to the case where the entire guide plate main body 6 is integrally formed, the manufacturing cost is reduced because the guide groove 7 does not require precision machining.

Further, as shown in FIG. 6, the guide plate main body 6 is formed by bending the outer peripheral edges of both side plates 21 outward to form a bifurcated shape, and a guide groove 7 is formed between the both side plates 21. , the outer edges of the side plates 21 may be used as the rail portions 15. Then, as shown in FIGS. 7a and 7b, the elongated mounting hole 23 is passed through from the rail part 15 of the guide plate main body 6 to the inside of the rail part 15 (downward in FIGS. 7a and 7b). A nest 24 having an oil supply hole 16, a passage hole 17, and a communication groove 18 similar to those in the previous embodiment is fitted into the attachment hole 23. A groove 25 is recessed inside the nest 24 so as to correspond to the guide groove 7 of the guide plate main body 6.

In addition, the nest 24 can also be used for the guide plate main body 6 having a one-plate structure or a three-plate structure, as shown in FIGS. 7c and 7d.

Moreover, the nest 24 is not integrally molded, but may be constructed by combining a plurality of parts 26 and 27 as shown in FIG. The passage hole 17 may be provided with a cylindrical pipe 28 in the guide plate main body 6 or the nest 24, as shown in FIGS. 9a and 9b.

Furthermore, the vertical position of the oil supply hole 16 of the guide plate main body 6 may be higher or lower than in the above embodiment, and the number and shape of the oil supply hole 16 and the passage hole 17, the shape of the communication groove 18, and the shape of the nest 24 can be changed as desired. You may do so. In addition to the configuration in which the nest 24 is inserted into the mounting hole 23, it is also possible to insert the nest 24 by gluing, riveting, screwing, or various types of welding (for example, spot welding).
4 may be attached to the attachment hole 23.

In the above embodiment, the protector washer 1
Although the oil supply hole 16, the passage hole 17 and the communication groove 18 are covered from the outside by the holes 3a and 13b, in another example shown in FIG.
The groove 18 is covered from the outside by a pair of lid members 31 and 32. Then, the lid member 31 on the discharge port 4 side
A communication hole 33 is formed at a position corresponding to the hole 14 of the protector washer 13a. In the above configuration, the protector washers 13a,
The oil supply hole 16 can be arranged closer to the outer peripheral edge of the guide plate main body 6 without being affected by the position of the bent portion 34 of the guide plate body 6. As a result, the saw chain 9 can be refueled more efficiently. especially,
Even if the saw chain 9 jumps while traveling and rises from the rail portion 15, the oil supply to the saw chain 9 will not be interrupted.

In another example shown in FIGS. 11 to 13, the upper and lower base ends of the guide plate body 6 are provided with guide plate bodies 6, respectively.
A mounting hole 41 extending in the width direction is formed through press working. A circular locking recess 42 having a diameter substantially the same as the length of the mounting hole 41 is formed on the outer periphery of the mounting hole 41 on both sides of the guide plate main body 6 in the thickness direction by cutting or grinding. A nest 44 consisting of a pair of members 43 having the same shape is fitted into the mounting hole 41 from both sides thereof. A stepped portion 4 that is fitted into the mounting hole 41 is provided on the side surface of each disc-shaped member 43 that faces each other.
5 is formed, and an engaging portion 46 that is accommodated in the locking recess 42 is provided on the outer periphery of the stepped portion 45 . A cylindrical large-diameter fitting part 47 and a cylindrical small-diameter fitting part 48 having the same outer diameter as the inner diameter of the fitting part 47 are formed at the lower part of the stepped part 45 . The small diameter fitting portion 48 of the other member 43 is fitted into the diameter fitting portion 47 and the other member 43
By fitting the small-diameter fitting portion 48 of one member 43 into the large-diameter fitting portion 47 of the two members 43, the two members 43 are coupled to each other. Note that a passage hole 17 is formed on the inner surface of both fitting parts 47 and 48, and a pair of oil supply holes 16 and a pair of passage holes 17 are provided.

On this other side, the nest 44 has both members 43
Since the engaging portions 46 come into contact with the locking recesses 42 in the coupled state, there is no possibility of displacement in the thickness direction within the mounting hole 41. Therefore, the positions of the holes 16, 17 and grooves 18 in the guide plate main body 6 are always constant, ensuring stable flow of lubricating oil. Further, the fitting parts 47 and 48 of both members 43 do not necessarily have to be completely connected, and even if they are connected by about half in the thickness direction, both members 43
The binding of is maintained. Therefore, if the depth of the locking recess 42 and the thickness of the engaging part 46 are the same, the nest 4 of this alternative example can be used even in guide plate main bodies 6 having different thicknesses.
4 can be used. Furthermore, in the embodiment shown in FIGS. 1 to 5, due to its structure, first the communication groove 18 is
are cut or ground on both sides of the guide plate main body 6, and then oil supply holes 16 and passage holes 17 are drilled, respectively. However, in this other example,
Since it is only necessary to form the mounting hole 41 through the mounting hole 41 by pressing and cutting or grinding the locking recess 42, the work efficiency during manufacturing can be improved and the manufacturing cost can also be reduced.

In another example shown in FIGS. 14 and 15, a pair of flanges 5 are provided in the oval mounting hole 51 on both sides of the outer periphery.
2 and a pair of elliptical disc-shaped members 54 and 55 having a difference portion 53 on the back surface.
6 is fitted. Furthermore, a semi-elliptic disc-shaped lid member 58 having a flange 57 on the upper outer periphery is fitted from the outside of the member 54 on the side of the discharge port 4, and is inserted into the mounting hole 5.
1 and is engaged with the member 54. Further, from the outside of the other side member 55, an elliptical disk-shaped cover member 60 having flanges 59 on the upper and lower outer peripheries is inserted and fitted into the attachment hole 51 and engaged with the member 55.

In this other example, the same effect as the other side shown in FIG. 10 is achieved. Furthermore, the lid member 5 on the discharge port 4 side
Since 8 is shaped like a semi-elliptical disk, it can also be used in a chainsaw main body 1 in which the discharge port 4 is located at a different position on the upper and lower sides.

In another example shown in FIG. 16a, instead of forming the communication groove 18 in the guide plate main body 6, a bulge 61 is formed in both protector washers 13a and 13b to communicate the oil supply hole 16 and the passage hole 17. are doing. Further, in another example shown in FIG. 16b, both protector washers 13a and 13b are omitted, and
A recess 62 is formed in the chainsaw body 1 and the chain cover 13c to serve as a communication groove 18. Furthermore, in another example shown in FIG. 16c, a notch 63 is formed in the protector washers 13a and 13b, and the notch 63 is covered from the outside by the chainsaw body 1 and the chain cover 13c, thereby forming a communication groove. It consists of 18.

In another example shown in FIG. 17a, the oil supply hole 16
Oil supply groove 71 opening from the outer peripheral end surface of the rail portion 15
, so that the side link 12 can be refueled more smoothly. In addition, this other example is
As shown in FIGS. 17b and 17c, the rail portion 1
Attachment hole 72 provided to open on the outer peripheral end surface of 5
A structure may be adopted in which a nest 73 having an oil supply groove 71 is inserted therein.

In another example shown in FIGS. 18 and 19, a pair of communication pipes 81 are arranged on the bottom surface of the guide groove 7 in the upper and lower parts of the guide plate main body 6. and,
The guide plate body 6 is connected from the passage hole 17 portion to the other portion of the guide plate body 6 via each communication pipe 81.
Lubricating oil is guided to a pair of oil supply pipes 82 provided on both sides in the thickness direction of the guide groove 7, so that both sides of the guide groove 7 are lubricated.

The oil supply pipe 82 has a pair of rail portions 115.
In this structure, a guide groove 7 is formed between the guide grooves 7 and oil is supplied from both sides of the drive link 11 rotating in the guide groove 7 through a pair of oil supply holes 116 opening in the guide groove 7. A passage hole 117, a pair of communication grooves 118, and both oil supply holes 11
An oil supply path having a circumferential cross section consisting of 6 is formed.

In this alternative example, since the saw chain 9 can be lubricated on both sides at various locations in the guide groove 7, the effect of lubrication can be further enhanced, especially for the long guide plate.

In another example shown in FIGS. 20a and 20b, the guide plate main body 6 is A pair of communication grooves 92 are formed leading to an oil tank 91 formed at the tip. A check valve 93 is provided in the oil tank 91 to prevent lubricating oil entering from one communication groove 92 from leaking into the other groove 92. Guide plate body 6
A pair of oil supply pipes 94 are interposed between the oil tank 91 and the outer periphery of the tip of the guide plate body 6 on both sides, so that both sides of the sprocket 95 are oiled from the oil tank 91.

In this alternative example, not only the saw chain 9 but also the sprocket 95 can be directly lubricated on both sides, so that the durability of not only the guide plate body 6 and the saw chain 9 but also the sprocket 95 can be improved.

In this alternative example, the oil tank 91 and the check valve 93 are not provided, and an oil supply pipe 94 is provided between each communication groove 92 and the outer circumference of the tip of the guide plate main body 6.
It is also possible to provide lubrication on both sides by interposing a lubrication system.
In this case, the oil tank 91 and check valve 93
The manufacturing cost can be lower than that provided with.

Moreover, as shown in FIGS. 21a and 21b,
The sprocket 9 is connected to the sprocket 9 by the oil supply pipe 94 of the other example.
The bearing 96 serving as the rotary sliding member of No. 5 may be lubricated. This makes it possible to improve the durability of the bearing 96, which is subject to particularly severe wear compared to other members.

Furthermore, among the above-mentioned embodiments and other examples, in the case where the guide plate main body 6 has a three-layer structure, the center plate 22 is made of a vibration-absorbing material such as a flexible metal (for example, lead) or vibration-proof rubber. It is also possible to use a vibration isolating plate. This will prevent vibrations during operation of the chainsaw, allowing work to be carried out safely and reliably.

Note that the other examples shown in FIGS. 10 to 19 are applicable not only to the integrally molded guide plate main body 6 but also to multilayer structures such as a two-layer structure, a three-layer structure, and a five-layer structure. Furthermore, a nested structure may be adopted in other examples shown in FIGS. 10, 16, 18, and 20.

Effects of the Invention As detailed above, the present invention forms an oil supply path with a circumferential cross section that communicates with the guide groove by a pair of oil supply holes and passage holes that supply oil to both sides of the drive link, and both communication grooves. This makes it possible to supply sufficient lubrication from both sides, such as between the inner surface of the rail on the opposite side of the discharge port and the side link of the saw chain, where lubrication was insufficient in the past, or on the rail section on the opposite side of the discharge port. This has the effect that oil can be reliably supplied between the outer peripheral edge and the side link of the saw chain.

In addition, since the passage hole is provided so as not to open directly into the guide groove, the passage hole is not clogged with chips from wood or the like, and furthermore, the opening of the guide groove of the oil supply hole can be located at a position that crosses the drive link. As a result, chips can be removed while the drive link is running, which is particularly effective in reducing the work required to remove the guide plate main body and saw chain from the chain saw and remove the chips from the oil supply hole.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment embodying the present invention, Fig. 2 is a partially enlarged cross-sectional view showing how the saw chain is attached to the guide plate main body, Fig. 3 is a partially front view, and Fig. 4 is a partial front view. A partial perspective view showing the vicinity of the oil supply hole of the guide plate body, Figures 5 and 6 are sectional views showing another example of the guide plate body, and Figure 7a is a partial enlarged view showing the state where the nest is attached to the guide plate body. 7b is a front view, FIGS. 7c, 7d, and 8 are partially enlarged sectional views showing other examples of the nest, and FIGS. 9a and 9b are views of the through hole. FIG. 10 is a partially enlarged sectional view showing another example, and FIG.
The figure is a partially enlarged front view showing the mounting hole and locking recess.
FIG. 12a is an exploded perspective view showing the nest installed in the mounting hole and locking recess in FIG. 11, and FIG. 12b
13 is a partially enlarged cross-sectional view showing a state in which the insert is installed in the mounting hole and the locking recess, FIG. 13 is a partially enlarged sectional view, and FIG. Enlarged sectional view, No. 15
The figures are an exploded perspective view showing the nest and lid member in Fig. 14, Fig. 16a is a partially enlarged cross-sectional view showing the protector washer having a bulging portion attached to the guide plate main body, and Fig. 16b is the chainsaw main body. FIG. 16c is a partially enlarged sectional view showing another example in which the communication groove is formed by a notch formed in the protector washer; Figure 17a
17b is a partially enlarged sectional view showing a guide plate main body having an oil supply groove, FIG. 17b is a partially enlarged sectional view showing a state in which a nest having an oil supply hole is attached to the guide plate main body,
Fig. 17c is a partially enlarged front view, Fig. 18 is a partially omitted front view showing the main body of the guide plate with the connecting pipe and oil supply pipe attached, Fig. 19 is a sectional view taken along the - line in Fig. 18, Fig. 20 a is a partially omitted front view showing the oil supply structure to the outer periphery of the sprocket;
0b is an enlarged cross-sectional view of the main part, FIG. 21a is a partially omitted front view showing the oil supply structure to the bearing part of the sprocket, FIG. 21b is an enlarged cross-sectional view of the main part, and FIGS. Figure 22b, Figure 23, Figure 24
Each figure is a partial sectional view showing the prior art of the present invention. Guide plate main body 6, guide groove 7, rail part 15,
115, oil supply hole 16, 116, outer end opening 16
a, 17a, passage holes 17, 117, communication groove 18,
118.

Claims (1)

[Scope of Claims] 1. A guide groove 7 is formed between a pair of rail parts 15, 115 provided on the outer peripheral edge of the guide plate main body 6, and a pair of oil supply holes 16 open in the guide groove 7.
In a chain saw oil supply structure that supplies oil from both sides of a drive link 11 that rotates within a guide groove 7 via a passage hole 17 that penetrates in the left-right direction closer to the inner circumference than the bottom of the guide groove 7, 117 is provided, and both left and right outer end openings 1 of the passage holes 17, 117 are provided.
A pair of communication grooves 18, 118 are provided to communicate between the oil supply holes 16, 116 and the outer end openings 16a of the oil supply holes 16, 116.
117 and both communication grooves 18, 118 form an oil supply path having a circumferential cross section and communicating with the guide groove 7. 2 The oil supply hole 16, the passage hole 17, and the communication groove 18
is formed in the nests 24, 44, 56, 73 that are fitted into the mounting holes 23, 41, 51, 72 formed through the outer peripheral edge of the guide plate main body 6. Oil supply structure of the chainsaw described. 3 The nest 44 consists of a pair of members 43 that can be fitted into each other, and each member 43 has a guide plate main body 6.
Engagement means 46 are provided on both sides in the thickness direction of the mounting hole 41 to engage with locking means 42 formed on the outer periphery of the mounting hole 41 to prevent the nest 44 from shifting in the thickness direction of the mounting hole 41. The oil supply structure for a chainsaw according to claim 2. 4. The oil supply structure for a chainsaw according to claim 1, wherein the guide plate main body 6 is integrally formed as a whole, and a concave portion is formed on the outer peripheral edge thereof to serve as the guide groove 7. 5. The guide plate main body 6 is composed of a pair of side plates 21 and a center plate 22 interposed between the side plates 21, and the guide groove 7 is formed between the outer peripheral edges of the side plates 21. Oil supply structure of the chainsaw according to item 1. 6 The guide plate main body 6 consists of a pair of side plates 21, and both side plates 2 are bent outward to form a bifurcated shape.
The oil supply structure for a chainsaw according to claim 1, wherein the guide groove 7 is formed between the outer peripheral edges of the chainsaw.