JPH0687101A - Lubricant-feeding mechanism for chain saw - Google Patents

Abstract

PURPOSE:To carry out satisfactory lubrication by widening a lubricant passage. CONSTITUTION:A groove part 22 is formed on at least one side face of a guide plate 4 consisting of a solid plate. A channel like cover member 23 is fit in the groove part 22 to form a lubricant passage 18 for making the lubricant flow. By that structure a sectional area of the lubricant is enlarged and good lubrication is carried out. Further, if the lubricant passage 18 is clogged, its cleaning is carried out by removing the cover member 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain saw lubricant supply structure for cutting wood, stone, concrete and the like.

[0002]

2. Description of the Related Art Generally, a chain saw is composed of a main body containing an engine, a plate-like guide plate whose base end is fixed to the front side of the main body, and a saw chain sliding around the guide plate. .

For example, as shown in US Pat. No. 3,279,508, a guide plate of a chain saw having a laminated structure is composed of a plurality of plate members, and the left and right side surfaces of the middle plate are
It has a structure in which outer panels are stacked. Grooves are formed along the longitudinal direction of the intermediate plate. A lid member having a U-shaped cross section is inserted from the outside of the groove, and a lubricant passage for flowing a lubricant is formed between the groove and the lid member. Further, as described above, grooves are formed along the longitudinal direction on the inner surface sides of the left and right outer plates instead of the middle plate.
In some cases, a lubricant passage is formed by inserting a lid member having a U-shaped cross section from the outside of the groove.

Further, as shown in Japanese Utility Model Laid-Open No. 48-94094, a groove is formed on one side surface of a guide plate made of one plate along the longitudinal direction thereof. A fitting step is formed on the outer periphery of the groove, and a lid member is attached to the fitting step by an adhesive, brazing, or welding so as to be flush with the side surface of the guide plate. The lid member closes the opening of the groove to form a lubricant passage between the groove and the lid member.

Further, as shown in Japanese Utility Model Application Laid-Open No. 53-47694, one side of the guide plate is widely cut, and a taper portion which inclines an end of the guide plate is cut. Along with this, the peripheral edge of the thin plate which is the lid member is tapered to this tapered portion so as to match the tapered portion, and is fastened and fixed to the guide plate with bolts or nuts.

[0006]

However, US-32
Regarding No. 79508, the thickness of the middle plate of the guide plate is 1.
35 mm to 1.70 mm, while the outer plate has a thickness of 1.20
It is from mm to 1.70 mm, and both plates are thin plates. Even if the lubricant passage is provided within this thickness, it is actually very difficult to process, and the lubricant passage is shallow and easily clogged.
It has not been put to practical use at all. Further, when the lubricant passage is blocked, there is no method for cleaning or repairing the lubricant passage, and there is no choice but to discard the lubricant passage.

[0007] In addition, regarding the actual exploitation Sho-48-94094,
Since the lid member is a thin plate having a narrow width, lateral bending and twisting are likely to occur during the production of the lid member, resulting in poor productivity.
Further, since the lid member is a thin plate, it is difficult to attach the lid member to the guide plate.As described above, the method of fitting the lid member into the fitting step portion causes the timber to be peeled off immediately during cutting work such as wood. There was a problem. That is, in the attachment method using an adhesive, when the entire guide plate is sandwiched by wood or the like and bent, the lid member is also bent, so that there is a problem that it is immediately peeled off. Further, in the mounting method by brazing or welding, there is a problem that the guide plate that has been hardened to improve rigidity is softened and the quality of the guide plate deteriorates.

[0008] Further, in the case of Japanese Utility Model Laid-Open No. Sho 53-47694, since the guide plate and the thin plate have to be tapered, the production cost becomes high. Further, the quenching of the guide plate causes deformation and distortion, but it is very difficult to correct the distortion of the processed product having the above-mentioned shape. When the distortion remains, it is difficult to fasten the wide thin plate to the guide plate body without oil leakage, because the partial unevenness easily forms a gap.

It is an object of the present invention to make the guide plate a single plate so that the grooves can be easily machined to improve the productivity, and the lubricant passage can be enlarged, so that good lubrication can be performed. It is to provide a lubricant supply structure of a chainsaw capable of performing.

[0010]

In order to solve the above-mentioned problems, the present invention forms a groove on at least one side surface of a guide plate made of a single plate, and a channel-shaped lid member is provided to the groove from the outside. The gist of the present invention is that a lubricant passage is formed between the groove portion and the lid member so as to be detachably fitted and to allow a lubricant to flow therethrough.

[0011]

Therefore, according to the present invention, a groove is formed on at least one side surface of the guide plate, and a channel-shaped lid member is fitted into the groove to widen the cross-sectional area of the lubricant passage.
If the lubricant passage is clogged, the lid member is removed for cleaning. Further, the channel-shaped lid member increases the rigidity.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. As shown in FIG. 1, a base end of a steel guide plate 4 for guiding the saw chain 5 is fixed to the front side of the chain saw 1. In the non-peripheral portion A of the guide plate 4, six through holes 10 having an approximately O-shaped cross section are provided in the longitudinal direction in a row at predetermined intervals in a row. On the outside of the through hole 10, as shown in FIG.
The opening of the guide plate 4 is chamfered to form a locking surface 12 that opens outward.

The through hole 10 has a first insert member 21 and a second insert member 31 formed of a material having a specific gravity smaller than that of steel, for example, polyamide (nylon) resin, on both side surfaces of the guide plate 4. Has been inserted from. The first and second insert members 21 and 31 have the same shape.
As shown in FIGS. 3 (a) to 3 (d), a plate-shaped closing portion 13 forming a substantially O-shaped plane and a side portion of the closing portion 13 in the longitudinal direction of the back surface and protruding from the back surface. It is composed of a pair of locking portions 14 and 15. The closing part 1
Discharge holes 17 for discharging the lubricant are provided in a line at a central portion of 3 at a predetermined interval in the longitudinal direction.

One of the pair of locking portions 14 and 15 is provided with a locking projection 14a on the side of one locking portion 14, and the other locking portion 15 has the locking projection 14a. A locking groove 15a is formed on the same side as the side where it is provided. When the first nesting member 21 and the second nesting member 31 are inserted from both side surfaces of the guide plate 4 in the through hole 10 and face each other and are fitted, the locking projection 1 of the first nesting member 21 is inserted.
4a is engaged with the engaging groove 15a of the second insert member 31, and the engaging groove 15a and the engaging protrusion 14a are also engaged in the remaining engaging portions 14, 15. Locking surface 1
6 abuts on the locking surface 12 of the guide plate 4 to prevent the closing portion 13 from entering the through hole 10 and completely closes the through hole 10. In other words, the first insert member 21 and the second insert member 31 are locked to the guide plate 4 by sandwiching the locking surface 12 which is a part of the guide plate 4. Then, by assembling the first insert member 21 and the second insert member 31, both members 2
A hollow portion 24 to which a lubricant is supplied is formed between 1 and 31.

Further, as shown in FIG. 2, a groove portion 22 extending in the longitudinal direction of the guide plate 4 is provided between adjacent through holes 10 on one side surface of the guide plate 4. A U-shaped member 23 as a channel-shaped lid member made of synthetic resin is removably tightly fitted in the groove portion 22 along its longitudinal direction by its elastic force. By assembling the U-shaped member 23 in the groove 22 as described above, the lubricant passage 18 for flowing the lubricant is formed. Further, as shown in FIG. 1, the supply pipe 19 is attached to the first insert member 21 closest to the base end portion of the guide plate 4, and the hose 20 extending from a lubricant supply source (not shown) is attached to the supply pipe 19. You can cut hard wood or stone while connecting and supplying lubricant.

Next, the operation of the chain saw lubricant supply structure thus constructed will be described. This chain saw 1 uses a hose 20 as a lubricant in the process of cutting an object such as wood.
And through the supply pipe 19 to the hollow portion 24 at the base end of the guide plate 4. Then, the lubricant is supplied to each lubricant passage 18
It is supplied to the hollow portion 24 at the tip end portion of the guide plate 4 via and is discharged from each discharge hole 17. The discharged lubricant flows on both sides of the guide plate 4 to remarkably reduce the frictional resistance between the guide plate 4 and the object to be cut and reaches the saw chain 5 sliding on the lower surface of the guide plate 4. To improve the lubricity between the guide plate 4 and the guide plate 4.

Also, in the unlikely event that the lubricant passage 1
When wood sawdust or the like has entered the inside of 8 and is clogged, the U-shaped member 23 and the second nesting member 31 are first disengaged, and then the U-shaped member 23 at the clogged portion is removed. It is removed from the groove 22 against the elastic force. Then, the sawdust and the like clogged in the groove portion 22 is removed by a brush or the like (not shown), and after the removal, the U-shaped member 23 and the first nesting member 21 are in the reverse order of the above description. Attach to 31.

As described above, the guide plate for the chainsaw of this embodiment has the following excellent features. (1) Since the guide plate 4 is formed of a single plate, the depth of the groove portion 22 can be sufficiently secured, the inside of the lubricant passage 18 is not blocked by sawdust, etc. Can be discharged from the discharge hole 17.

(2) Further, since the shape of the groove portion 22 is simple, mass production of groove processing can be easily carried out. Therefore, the production cost can be reduced and the economical merit is high.

(3) Since the U-shaped member 23 is made of synthetic resin, its width, height, wall thickness and the like can be arbitrarily selected with considerable freedom. Moreover, since the U-shaped member 23 is made of synthetic resin, the adhesive force between the groove portion 22 and the U-shaped member 23 can be significantly increased by utilizing the elastic force thereof.

(4) Since the depth of the groove portion 22 can be sufficiently secured, even if the entire U-shaped member 23 is bent during the cutting operation, the groove portion 22 and the U-shaped member 23 are strongly adhered to each other as described above. Therefore, the lubricant passage 18 can be held without any trouble.

(5) In the unlikely event that the lubricant passage 18 is clogged with foreign matter, the U-shaped member 23 is removed from the groove portion 22 and a new U-shaped member 23 is tightly fitted after the repair so that the guide plate 4 can be mounted again. Can be used.

The present invention is not limited to the above embodiment, and may be appropriately modified as follows without departing from the spirit of the present invention. (1) In the above-described embodiment, the groove portion 22 is provided linearly along the longitudinal direction of the guide plate 4, but in addition to this, the groove portion 22 is provided along the width direction of the guide plate 4, or is curved, Alternatively, it may be provided on the entire guide plate 4.

(2) In the above embodiment, the discharge holes 17 are provided in the first and second nesting members 21 and 31, but the discharge holes 1
7 may be omitted. Alternatively, the discharge holes 17 may be provided on the outer surface of the U-shaped member 23 or the like.

(3) The guide plate 4 does not communicate with the first and second nesting members 21 and 31, and the groove portion 22 is provided in a concave shape to fit the U-shaped member 23 to form the lubricant passage 18. May be.

(4) In the above embodiment, the groove portion 22 is provided on one side surface of the guide plate 4, and the U-shaped member 23 is provided in the groove portion 22.
Alternatively, the groove portions 22 may be recessed in the left and right side surfaces of the guide plate 4 and the U-shaped member 23 may be fitted in the groove portions 22. In this case, it is better to provide the groove portions 22 at positions displaced from each other.

(5) The supply pipe 19 and the hose 20 are omitted so that the lubricant can be supplied from the main body 2 to the hollow portion 24 at the base end portion of the guide plate 4, and as described above, the hollow portion 2 at the tip end portion is provided.
The lubricant may be circulated to No. 4. With this configuration, the area around the chainsaw is simplified and the appearance is improved.

(6) The groove portion 22 is formed at an arbitrary position of the guide plate 4 and on the inner side surface of the groove portion with a locking step portion, or is formed in a tapered shape so that the inner side surface of the groove portion 22 spreads toward the bottom surface. It can be changed to any shape such as. Then, the U-shaped member 23 matching the shape of the groove portion 22 thus formed may be closely fitted.

(7) First and second nesting members 21, 31
May be transparent. As a result, the distribution state of the lubricant can be well understood. (8) The material of the U-shaped member 23 is not limited to synthetic resin, and oil resistant rubber or elastic member may be used.

[0030]

As described in detail above, according to the present invention, by forming the guide plate as one plate, the groove portion can be easily processed and the productivity is improved. Further, since the lubricant passage can be enlarged, there is an excellent effect that good lubrication can be performed.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a chainsaw in this embodiment.

FIG. 2 is likewise a vertical cross-sectional view showing a part of a guide plate.

3 (a) is a front view of the first or second insert member, and FIG. 3 (b) is an AA line in FIG. 3 (a).
3C is a side view on the locking groove side of the first or second insert member, and FIG. 3D is a right side view of the first or second insert member. is there.

[Explanation of symbols]

4 ... Guide plate, 22 ... Groove portion, 23 ... Lid member, 18 ... Lubricant passage

Claims (1)

[Claims] 1. A groove (22) is formed on at least one side surface of a guide plate (4) made of a single plate, and a channel-shaped lid member (23) can be detachably attached to the groove (22) from the outside. A lubricant supply structure for a chainsaw, characterized in that a lubricant passage (18) for allowing a lubricant to flow is formed between the groove portion (22) and the lid member (23) by fitting.