Sawdust removing device in sawing machine

Cutting – With means to clean work or tool

Patent

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Details

83788, 152565, B23D 5900, B27B 1316

Patent

active

054409608

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

1. Technical Field
This invention relates to a device for removing sawdust adhering to a saw blade of a sawing machine, and in particular to a sawdust removing device provided with a cleaning instrument such as a brush for which a suitable overlap with respect to the saw bade is always maintained so that the sawdust is always removed from the saw blade.
2. Background Art
In the prior art, a sawdust removing device for a sawing machine, such as a circular rotary wire brush, overlaps the saw blade and is rotated to clear the sawdust from the saw blade.
However, such a rotary wire brush fails to remove the sawdust from the saw blade due to abrasion after being used for many hours. Hence, the operator of the sawing machine must watch the abrasion of the wire brush and adjust the overlap between the brush and the saw blade when the brush is worn to a certain extent. Finally, when the wear on the wire brush reaches a preset limit, the operator must replace the wire brush.
When the wire brush wears to a certain extent as mentioned above, the operator adjusts the overlap between the wire brush and the saw blade to a suitable amount. However, the amount of the adjusted overlap tends to differ, depending on the individual preferences of the operators. Furthermore, the operator may sometimes forget to adjust the overlap. In order to resolve these problems, a technique has been developed as shown, for example, in Japanese patent (A) 1-177912, for automatically detecting the amount of abrasion of the wire brush and adjusting the amount of overlap between the saw blade and the wire brush.
In the above Japanese patent, an available automatic sawdust removing device is disclosed. The device is equipped with a wire brush which moves from a position where it clears the sawdust from the saw blade to another position where the amount of abrasion of the wire brush is automatically detected. After the amount of abrasion is detected, the position of the wire brush is adjusted according to the detected amount. Thus, the amount of overlap is automatically adjusted and is always maintained within a certain suitable value.
There are, however, some drawbacks in the device to be overcome. In the device, the amount of abrasion of the wire brush is periodically detected even if the brush is not badly worn, resulting in wasted effort. On the other hand, the adjustment of the overlap is sometimes not carried out regardless of heavy abrasion which has occurred in a short time and which causes the wire brush to fail to clear the sawdust from the saw blade. The degree or rate of abrasion of the wire brush differs according to the type of a saw blade used, changes in cutting conditions, and so on. It is therefore difficult to determine a suitable period for the device to detect the amount of abrasion of the wire brush.


DISCLOSURE OF INVENTION

The object of the present invention is therefore to overcome these problems and provide a device for positively removing saw dust from the saw blade of the sawing machine.
The device of the present invention includes a supporting member, for reciprocatingly moving towards and receding from the saw blade, mounted on a saw blade housing in which the saw blade is mounted, a cleaning instrument supported by the supporting member, and a device for adjusting the overlap of the cleaning instrument with respect to the saw blade to always maintain a suitable overlap.
The sawdust adhering to the saw blade is removed by the cleaning instrument by moving the supporting member towards the saw blade so that the cleaning instrument supported by the supporting member can overlap the saw blade. A suitable overlap between the saw blade and the cleaning instrument is always maintained, and the cleaning instrument is actuated, thus the sawdust is positively removed from the saw blade.


BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front view showing a sawing machine provided with a sawdust removing device of the present invention.
FIG. 2 is an enlarged front view showing a part of the sawing machine, taken in

REFERENCES:
patent: 417093 (1889-12-01), Robison
patent: 1336239 (1920-04-01), Kinraide
patent: 2466644 (1949-04-01), McBride
patent: 2619009 (1952-11-01), Begle
patent: 2953952 (1960-09-01), Alexander
patent: 3485123 (1969-12-01), Komendowski
patent: 4003276 (1977-01-01), Schmitt
patent: 4633999 (1987-01-01), Perneczky
patent: 4830553 (1989-05-01), Abeyta et al.
patent: 4893533 (1990-01-01), Harris

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