Cutting auxiliary device in band saw

Abstract

In a band saw, it is intended that a so-called blade drift is corrected and straight line cutting of an object is easily performed. Further, an accurate correction is realized by a simple operation. A cutting auxiliary device in the band saw in accordance with the present invention is a device used to correct a shift of a cutting line when the cutting line is shifted from a straight line in the band saw for cutting a work by using a flexible steel band. The cutting auxiliary device in the band saw has a working board having a board face for performing an operation for cutting the work and equipping an edge port plate for passing the flexible steel band on the board face; a working board support portion for supporting the working board so as to be horizontally rotated with the flexible steel band as a center; a laser projector attached to a band saw main body side and projecting a laser beam so as to be overlapped with the shifted cutting line when the work is straightly cut by the flexible steel band on the working board and the cutting line is shifted from the straight line; and a working board fixing portion for fixing the working board to a receiving portion of the band saw main body side in a place which the straight line of the laser beam projected from the laser projector and a mark on the working board are aligned.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an entire band saw applying a cutting auxiliary device in accordance with the invention thereto.

FIG. 2 is an enlarged view of a main portion in FIG. 1.

FIG. 3 is an exploded perspective view showing the lower face of a working board.

FIG. 4 is a cross-sectional view of a portion of the working board in the invention.

FIG. 5 is a plan view for an operating explanation in the invention.

FIG. 6 is similarly a bottom view.

FIG. 7 is an explanatory view showing a generating state of a drift.

FIG. 8 is an explanatory view showing an irradiating state of a laser beam.

FIG. 9 is an explanatory view showing a rotating state of the working board.

FIG. 10 is an explanatory view showing a cutting work state after the drift is adjusted.

Claims

1. A cutting auxiliary device used to correct a shift of a cutting line when the cutting line is shifted from a straight line in a band saw for cutting a work by using a flexible steel band, wherein the cutting auxiliary device in the band saw comprises: a working board having a board face for performing an operation for cutting the work and equipping an edge port plate for passing the flexible steel band on the board face;a working board support portion for supporting the working board so as to be horizontally rotated with the flexible steel band as a center;a laser projector attached to a band saw main body side and projecting a laser beam so as to be overlapped with the shifted cutting line when the work is straightly cut by the flexible steel band on the working board and the cutting line is shifted from the straight line; anda working board fixing portion for fixing the working board to a receiving portion of the band saw main body side in a place which the straight line of the laser beam projected from the laser projector and a mark on the working board are aligned.

2. The cutting auxiliary device in the band saw according to claim 1, wherein the working board support portion is constructed by a base portion having a circular planar shape and arranged on the band saw main body side, and is also constructed by a receiving portion arranged on this circular base portion and having a circular concave portion fitted to the circumference of the circular base portion; and the base portion and the receiving portion are fastened and integrally fixed by a working board fixing tool attached to a lower face of the base portion.

3. The cutting auxiliary device in the band saw according to claim 1, wherein a working board guide portion for guiding the working board so as to be inclined with respect to the flexible steel band is arranged on a lower face of the working board in at least two places at an equal interval in a circumferential direction with the flexible steel band as a center, and a guide portion receiving portion is arranged by the same number of places on the band saw main body side correspondingly to the working board guide portion.