JPH04279301A - Manufacture of guide plate for chain saw guide plate thereof - Google Patents

Abstract

PURPOSE:To easily form a plurality of penetration holes provided in the central part of a guide plate in order to make the guide plate reduced in weight, and prevent a resin material filled in the penetration plate from dropping out of the guide plate. CONSTITUTION:After making a plurality of penetration holes 2 in the central part of a guide plate 1 for a chain saw, engaging parts 5 are formed by pressing and thus plasticity-deforming the circumferential parts of the penetration holes 2 and the penetration holes 2 are filled, and then cured, with a synthetic resin material 7, thereby positively securing the synthetic resin material 7 integrally with the guide plate 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for reducing the weight of a guide plate for a chainsaw used for cutting wood, etc., and a guide plate manufactured by the method.

0002

BACKGROUND OF THE INVENTION Conventionally, when felling trees using a chainsaw, the operator has to support the chainsaw with both hands, and felling trees in mountainous areas is particularly hard work.

[0003] In order to reduce this heavy labor, it is necessary to reduce the overall weight of the chainsaw, and the most effective way to reduce the weight of the chainsaw is to reduce the weight of the guide plate, which has a large weight ratio. Met.

[0004] As a conventional technique for reducing the weight of the guide plate of a chainsaw, there is Japanese Utility Model Application No. 63-188101, which proposes that a through hole is made in the guide plate (guide plate) of a chainsaw, and guides are inserted from both sides of the through hole. By inserting and fitting a nesting member with a smaller specific gravity than the plate, the nesting member is locked across the guide plate, thereby making a part of the guide plate lighter and reducing the weight of the entire guide plate. That is.

By the way, in addition to the single-plate guide plate mentioned above, the guide plate of the chainsaw includes the front view shown in FIG. 13(a) and FIG.
) There is a three-piece guide plate as shown in the enlarged sectional view taken along line GG in Figure 1. outer panels 20 on both sides of
are joined at multiple locations S around the middle plate 21 (x-marked locations in the diagram)
are welded and integrated by spot welding etc. to form the guide plate 19.
was formed. When reducing the weight of this three-piece guide plate, the above-mentioned Utility Model Application No. 63-188101
As disclosed in No. 1, the nesting members are fitted to sandwich the middle plate.

[0006]

[Problems to be Solved by the Invention] However, the fitting part of the above-mentioned insert member may come off due to vibration of the chainsaw in use or contact with wood, etc., or may fall off due to wear. Work sometimes had to be interrupted to fit a new nesting member.

On the other hand, when a through hole is provided in a three-piece guide plate, in addition to the above-mentioned falling-off of the insert member, the outer plate may peel off from the through hole, and dust may enter between the outer plate and the middle plate. may damage the information board.

Furthermore, in any of the above cases, the work of fitting the individual nesting members into the guide plate is time consuming and the work efficiency is not good.

[0009] In view of the above-mentioned problems, the present invention has developed an efficient guide plate in which the lightweight filler does not fall off from the lightweight guide plate, and the outer plate does not peel off in the case of a three-layer guide plate. It is an object of the present invention to provide a manufacturing method for easily manufacturing a guide plate and a guide plate manufactured by the method.

0010

[Means for Solving the Problems] In order to achieve the above object, the method for manufacturing a guide plate for a chainsaw according to the present invention includes providing a plurality of through holes in the center of the guide plate, and filling the through holes with a lightweight filler. In the method for manufacturing a guide plate for a chainsaw, after the through-hole is provided, a locking portion is formed by pressing the periphery of the through-hole, and the through-hole is filled with a lightweight filler. It is something.

Further, the chainsaw guide plate according to the present invention is a three-layer chain saw guide plate composed of two outer plates and one middle plate, and has a plurality of through holes in the center of the outer plate. A locking portion is formed by pressing the periphery of the through hole, and a through hole larger or smaller than the through hole is formed in the center of the middle plate at the same position as the through hole formed in the outer plate. The outer plate is attached to both sides of the intermediate plate, and the through hole is filled with a lightweight filler to form an integrated structure.

0012

[Operation] According to the above method, after a plurality of through holes are provided in the guide plate, the locking portions formed by pressing the periphery of the through holes lock the lightweight filler filled in the through holes.
The lightweight filler material is integrated with the guide plate, and the lightweight filler material will not fall off from the guide plate during operation.

[0013] In addition, in a three-piece guide plate, two outer plates are manufactured by the above method, a through hole larger or smaller than the above-mentioned through hole is provided in the middle plate, and the outer plate is formed on both sides of this middle plate. By joining these and filling the through-holes with a lightweight filler, the stepped part formed around the different diameters of the through-holes in the middle plate and the outer plate, and the locking part formed in the outer plate, are lightweight. Since the outer panels are locked together through the filler and the lightweight filler, the lightweight filler is prevented from falling off and the outer panels are prevented from peeling off.

[0014]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. First, an outline will be explained using process diagrams showing the manufacturing method of the present invention shown in FIGS. 1(a) to 1(d).(a)
As shown in (b), a through hole 2 is provided in the guide plate 1, and a pressing member 3 is pressed into the through hole 2 as shown in (b). At this time, the locking portion 5 is formed inside the through hole 2 by plastically deforming the periphery of the through hole 2 along the shape of the tip of the pressing member 3. Next, as shown in (c), the lower surface of the through hole 2 is sealed with a sheet member 8, and a lightweight filler 7 is filled from above using a filling nozzle 6. Then, by curing the lightweight filler 7, the guide plate 1 and the lightweight filler 7 are integrated as shown in (d), and the locking portion 5 securely locks the lightweight filler 7. Note that 1a is a guide groove provided around the guide plate 1.

2 to 5 are drawings showing a first embodiment in which the manufacturing method of the present invention is applied to a guide plate consisting of a single plate, in which FIG. 2 shows the hole punching process, FIG. 3 shows the pressing process, and FIG. 5 shows the filling process, and FIG. 5 shows the guide plate 1 integrated by the above process.

To explain in detail, as shown in the front view of the guide plate with holes punched in FIG. 2(a) and the enlarged cross-sectional view taken along line A-A in FIG. A straight through hole 2 is provided.

Next, as shown in the front view when the guide plate is pressed in FIG. 3(a), the periphery of the through hole 2 is pressed by the pressing member 3 from one side of the through hole 2. At this time, the periphery of the through hole 2 is plastically deformed into the same shape as the tapered portion 3a at the tip of the pressing member 3, as shown in the BB enlarged sectional view of FIG. 3(b).

In this embodiment, a tapered portion 4 is formed around the through hole 2, and a locking portion 5 that continuously projects from the tapered portion 4 is formed inside the through hole 2.

Next, as shown in the cross-sectional view of FIG. 4 showing the state in which the guide plate is filled with a lightweight filler, the guide plate 1 is placed on the sheet member 8, and the light filler 7 is injected from above by the filling nozzle 6.
(For example, a material with a specific gravity lighter than that of the guide plate, such as synthetic resin such as polyacetal resin, polycarbonate resin, or fiber-reinforced plastic).

By curing the lightweight filler 7 in this state, the guide plate 1 and the lightweight filler 7 are integrated, as shown in the cross-sectional view of the guide plate containing the lightweight filler in FIG.

In this way, after the through hole 2 is provided in the guide plate 1, the locking portion 5 is easily formed by pressing the periphery of the through hole 2, which simplifies the manufacturing process. The member 5 allows the lightweight filler 7 to be reliably locked to the guide plate 1.

The above-mentioned through-hole 2 can be punched out by attaching a punch to a press machine, and the through-hole 2 can also be pressed by attaching the above-mentioned pressing member 3 to this press machine. , the punching process and the pressing process can be performed continuously by the same machine.

Further, in this first embodiment, by pressing from both sides of the through hole 2, tapered portions 4 are formed on both sides of the through hole 2.
A locking portion 5 is formed to further strengthen the locking relationship between the lightweight filler 7 and the guide plate 1.

By the way, as mentioned above, there are two types of chain saw guide plates: one made of one plate and the other type made of three plates. This guide plate 9 made of three sheets is made by combining two outer plates 10 on both sides of a middle plate 11, and when the above method is applied to this three-piece type, a different effect is exhibited. .

This three-piece combination type will be explained with reference to a second embodiment shown in FIGS. 6 to 10. In this second embodiment,
Figures 6 and 7 show the hole punching process, Figure 8 shows the pressing process, Figure 9 shows the filling process, and Figure 10 shows the guide plate 9 integrated through the above steps.
It shows.

To explain in detail, as shown in the front view of the outer panel with holes punched in FIG. 6(a) and the enlarged sectional view taken along line CC in FIG. 6(b), there is a A plurality of straight through holes 13 are provided.

Furthermore, the middle plate 11 of the guide plate 9 is shown in FIG. 7(a).
A front view of the hole punched in the middle plate and D-D in (b)
As shown in the enlarged sectional view, a plurality of slightly larger straight through holes 14 are provided in the center of the middle plate 11 at the same positions as the through holes 13 provided in the outer plate.

Next, as shown in the front view when the outer plate is pressed in FIG. 8(a), the pressing member 3 is inserted from one side of the through hole 13.
The through hole 13 is pressed by. At this time, the periphery of the through hole 13 is plastically deformed into the same shape as the tapered portion 3a at the tip of the pressing member 3, as shown in the enlarged cross-sectional view taken along the line EE in FIG. 8(b).

In this embodiment, a tapered portion 4 is formed around the through hole 13, and a locking portion 5 that continuously projects from the tapered portion 4 is formed inside the through hole 13. (See FIG. 10(b)) Next, as shown in the cross-sectional view of FIG. 9 showing the state in which the guide plate is filled with a lightweight filler, the above-mentioned Middle plate 11
are sandwiched from both sides, and in this state, a plurality of locations S (marked with x in FIG. 7) around the middle plate 11 are welded and integrated by spot welding or the like to form one guide plate 9. In this state, irregularities are formed around the through hole 12 so that the outer plate 10 and the middle plate 11 have different diameters. (Figure 10(b)
) Then, place this three-piece guide plate 9 on the sheet member 8, and fill it with the lightweight filler 7 (in this case, it is more effective to use the above-mentioned fiber-reinforced plastic) using the filling nozzle 6 from above. do.

By curing the lightweight filler 7 in this state, as shown in the cross-sectional view of the guide plate containing the lightweight filler in FIG. 10(a) and the partially enlarged view in FIG. The filling material 7 is integrated.

In this way, in the three-ply guide plate 9, by pressing the through hole 13 of the outer plate 10, the lightweight filler 7 can be easily locked to the guide plate 9, and the locking Since the lightweight filler material 7 locked in the portion 5 locks the outer panels 10 together, it is possible to prevent the outer panels 10 from peeling off from the middle panel 11.

[0032] The lightweight filler 7 also fills the middle plate 11 and the outer plate 10.
Since it also serves as a coupling means, the number of spot welding points S can be reduced compared to the conventional guide plate 19 shown in FIG.

Note that FIG. 11 (
As shown in the cross-sectional view of a) and the partially enlarged view of (b), even if the outer plate 10 is joined to the middle plate 11 in the opposite manner to the above embodiment, the structure is such that the outer plate 10 does not separate from the middle plate 11. .

Furthermore, as shown in the front view of the guide plate showing the third embodiment in FIG. 12(a) and the enlarged cross-sectional view taken along the line FF in FIG. Hole 1
By providing a plurality of 6, the lightweight filler 7 filled in the through hole 16 (in this case, it is more effective to use the above-mentioned fiber-reinforced plastic) serves as a means for connecting both the outer panels 17 and the middle panel 18. Compared to the second embodiment, the number of spot welding locations S (marked with x in the figure) can be further reduced. In this case, the weight of the guide plate 15 can be further reduced by forming a cavity 18a in the center of the intermediate plate 18.

[0035] By using a flexible sheet member 8 coated with heat-resistant resin or the like, the above-mentioned sheet member 8 absorbs the gap between the sheet member 8 and the sheet member 8 due to distortion of the guide plate, etc., and seals the bottom surface of the guide plate. be able to.

Furthermore, in the embodiment described above, the tip of the pressing member 3 is formed into a tapered shape to form the tapered portion 4 and the locking portion 5 around the through hole. Any shape may be used as long as it can form the locking portion 5 that can be used.

[0037]

[Effects of the Invention] According to the present invention, a through hole for reducing the weight of the guide plate and a locking portion for locking a lightweight filler filled in the through hole can be easily formed in the center of a guide plate for a chainsaw. Therefore, the manufacturing process can be simplified and work efficiency can be improved.

[0038] Further, since it is possible to continuously process the through hole and the locking part using the same machine, automation is also possible.

[0039]The lightweight filler filled in the through hole of the guide plate is securely locked in the locking portion formed around the through hole, so that it will not fall off.

Furthermore, in the three-ply guide plate, the locking portion formed around the through hole prevents the lightweight filler from falling off and locks the outer panels together, thereby preventing the outer panels from peeling off. be able to.

[Brief explanation of the drawing]

FIGS. 1(a) to 1(d) are cross-sectional views showing the manufacturing process of the present invention.

[Fig. 2] (a
) is a front view, and (b) is an enlarged sectional view taken along line A-A in the same figure.

[Figure 3] (a) when the surface is pressed against the guide plate of the first embodiment
is a front view, and (b) is an enlarged sectional view taken along line BB in the same figure.

FIG. 4 is a cross-sectional view of the guide plate of the first embodiment filled with a lightweight filler.

FIG. 5 is an enlarged sectional view of the first embodiment.

FIG. 6(a) is a front view of the guide plate according to the second embodiment with holes punched in the outer plate, and FIG. 6(b) is an enlarged sectional view taken along line CC in the same figure.

FIG. 7(a) is a front view of a state in which a hole is punched in the middle plate of the guide plate of the second embodiment, and FIG. 7(b) is an enlarged sectional view taken along line DD of the same figure.

[Figure 8] When pressed against the outer panel of the guide plate of the second embodiment
(a) is a front view, and (b) is an enlarged sectional view taken along line E-E of the same figure.

FIG. 9 is a cross-sectional view showing a state in which the guide plate of the second embodiment is filled with a lightweight filler.

FIG. 10(a) is an enlarged sectional view showing a second embodiment of the present invention, and FIG. 10(b) is a partially enlarged view of the same figure.

FIG. 11(a) is an enlarged sectional view showing a modification of the second embodiment, and FIG. 11(b) is a partially enlarged view of the same figure.

FIG. 12(a) is a front view showing the third embodiment;
(b) is an enlarged sectional view taken along the line FF in the figure.

FIG. 13(a) is a front view showing a conventional guide plate;
(b) is an enlarged sectional view taken along line GG in the figure.

[Explanation of symbols]

1,9,15...information board 2, 12, 16...through hole 3...Press member 4...Tapered part 5...Locking part 6...Filling nozzle 7...Lightweight filler 8...Sheet member 10, 17... Outer panel 11, 18...middle plate

Claims (2)

[Claims] [Claim 1] A plurality of through holes are provided in the center of the guide plate,
In the method for manufacturing a guide plate for a chainsaw in which the through hole is filled with a lightweight filler, after the through hole is provided, a locking portion is formed by pressing the periphery of the through hole, and the through hole is filled with a lightweight filler. A method for manufacturing a guide plate for a chainsaw, characterized in that it is filled with a material. [Claim 2] A three-piece chainsaw guide plate composed of two outer plates and one middle plate, wherein a plurality of through holes are provided in the center of the outer plate, and the periphery of the through holes is A locking portion is formed by pressing, and a through hole larger or smaller than the through hole provided in the outer plate is provided in the center of the middle plate at the same position as the through hole provided in the outer plate. A guide plate for a chainsaw, characterized in that an outer plate is joined and the through hole is filled with a lightweight filler to be integrated.