JPH06297404A - Guide plate for chain saw - Google Patents

Abstract

PURPOSE:To provide a guide plate positively by discharging the chips entering a guide groove to prevent the obstruction of cutting work due to the chips. CONSTITUTION:A guide plate for a chain saw is constituted by integrally boning two steel plates 2, 3 in a principal rafter state and the guide groove 4 of a chain saw is provided to the peripheral edge parts of both steel plates and elongated chips discharge holes 5 is longitudinally provided to the central parts of the steel plates and chip guide holes 6 are provided to the steel plates in the periphery of the chips discharge holes so as to communicate with the bottom of the guide groove and the chip discharge holes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide plate for a chain saw, which is mainly used for cutting a building board material such as a gypsum board.

[0002]

2. Description of the Related Art A chain saw has a structure in which an elongated guide plate is projected from a chain saw body having an engine installed therein, and a saw chain is slid around the guide plate to perform a cutting action. Is provided with a guide groove, and lubricating oil is also supplied to the guide groove so as not to hinder high-speed sliding of the saw chain.

By the way, a chain saw used for cutting a building board material such as a gypsum board is smaller than a chain saw used for felling lumber used for felling wood and the like. , Carbide chips are brazed to enable cutting of hard stones.

[0004]

When a building plate material such as gypsum board is cut using the above-described chain saw, a large amount of chips are generated. Most of this swarf scatters to the outside, but part of it enters the guide groove that guides the saw chain. The chips that have entered the guide groove accumulate in the gap between the saw chain and the drive link in the groove, mix with the lubricating oil, and stick to the bottom of the groove. It solidifies under pressure. If the solidified chips gradually increase in thickness, the drive link will be worn out, or the saw chain will be partially lifted around the guide plate, causing vibrations in the sliding motion of the saw chain and preventing smooth cutting work. become.

The present invention has been made in view of the above points, and positively discharges the chips entering the guide groove during the cutting work so that the cutting chips do not hinder the cutting work. An object is to provide a guide plate for a chain saw.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the gist of the present invention is that two pressed steel plates are integrally joined together in a palm-shape, and the peripheral edges of both steel plates are joined together. A guide groove of the saw chain is formed, and a long and narrow chip discharge hole is formed in the central portion of the steel plate, and the guide hole bottom and the chip discharge hole are communicated around the chip discharge hole to connect the chip guide hole. It is a guide plate for a chain saw, which is characterized by being formed.

[0007]

[Operation] Chips that enter the guide groove during cutting work are pushed by the drive link of the saw chain and are pushed out to the chip discharge hole through the nearby chip guide hole while moving inside the groove, The cutting work will be carried out smoothly because there will be no accumulation in the guide groove.

[0008]

1 is a front view of a guide plate of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1, and FIG. 4 is an enlarged view taken along line BB of FIG. FIG.

In the drawings, reference numeral 1 indicates a guide plate according to the present invention. The guide plate 1 is composed of two pressed steel plates 2, 3
Are joined together in a chisel shape. The peripheral edges of the two steel plates 2 and 3 are projected backward and parallel to the outside, and the saw chain A
The guide groove 4 is formed. An elongated chip discharge hole 5 is formed in the longitudinal direction in the central portion of the two joined steel plates. Two steel plates are locally bulged backward in a groove shape around the chip discharge hole 5, and the groove bottom 4a of the guide groove 4 and the chip discharge hole 5 are communicated with each other to form a chip guide hole 6. Set up.

However, as the two steel plates 2 and 3 constituting the guide plate 1, thin steel plates having a thickness corresponding to the wall thickness of the guide groove 4 are used, and at the joint surface parts of the two steel plates 2 and 3. It is joined by spot welding or the like as in the past.
In the embodiment, the chip guide hole 6 is provided only on one side of the guide plate 1 where the cutting action of the saw chain A is performed, that is, on the notch side where the saw chain A slides from the tip side of the guide plate 1 toward the base. However, in the guide plate 1 that is used upside down, the chip guide holes 6 are provided on both sides of the guide plate 1. Further, the chip guide hole 6 is inclined opposite to the sliding direction of the saw chain A so that chips can easily enter.

Reference numeral 7 in the drawing denotes a sprocket arranged at the tip of the guide plate 1, which rotates together with the sliding motion of the saw chain A to prevent abrasion of the sliding contact portion between the saw chain A and the guide plate 1 at the tip of the guide plate 1. It is for mitigation. Reference numeral 8 denotes a mounting hole formed in the base portion of the guide plate 1. In the mounting hole 8 portion, two steel plates 2 and 3 are used as a flat plate portion, and a spacer 9 is sandwiched and integrally joined to form a chain saw body (Fig. The length of the saw chain A can be adjusted by attaching a guide plate 1 to the not shown). These are basically the same as conventionally known guide plates.

[0012]

According to the guide plate of the present invention having the above-mentioned structure, the following effects can be obtained.

(1) The guide plate is formed by pressing two thin steel plates having the wall thickness of the guide groove, and a punching-out chip discharge hole is formed at the center of the two joined steel plates. Therefore, the amount of steel plate used can be reduced and the cost can be reduced. In addition, the weight of the entire guide plate is reduced, which facilitates handling.

(2) Since the chips entering the guide groove during the cutting operation by the chain saw immediately enter the guide groove, pass through the chip guide holes, and exit to the chip discharge hole to be discharged to the outside.
The chips are not accumulated and solidified at the bottom of the guide groove to hinder the sliding motion of the saw chain, and the wear of the saw chain is reduced to extend the life of the guide plate. In addition, vibration of the saw chain from sliding on the guide plate can be reduced, so that the sawing operation of the chain saw can be smoothly performed and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a guide plate according to the present invention.

FIG. 2 is a plan view of the guide plate of the present invention.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 ... Guide plate 2 ... Steel plate 3 ... Steel plate 4 ... Guide groove 5 ... Chip discharge hole 6 ... Chip guide hole A ... Saw chain

Claims (1)

[Claims] 1. A press-formed two steel plates are integrally joined in a palm-like shape, a guide groove of a saw chain is formed in the peripheral portions of both steel plates, and a long and narrow chip discharge hole is formed in the central portion of the steel plates. A guide plate for a chain saw, characterized in that a chip guide hole is formed by communicating the bottom of the guide groove and the chip discharge hole around the chip discharge hole.