JPS62208821A - Band sawing machine - Google Patents

Abstract

PURPOSE:To eliminate restrictions on the cutting length of a workpiece, obviate necessity for returning a band saw and make overall construction simple by disposing in a laterals direction the sides of both straight advancing parts of an endless band saw so hung on a pair of pulleys as to be capable of circulation. CONSTITUTION:The side 7a of the straight advancing part 7 of a band saw 5 hung on a pair of pulleys 3 is arrayed with a guide roller 8 in a line toward a width direction and the passage 9 of the straight advancing part 7 is formed in the same line within an identical plane. When a workpiece 'W' is cut, therefore, the straight advancing part 7 at both use and non-use sides is arrayed in a line and as a trailing line passes through the groove of the workpiece 'W' cut with a leading line, the straight advancing part 7 at the non-use side does not come in contact with a part of the workpiece 'W' when said part 7 at the use side is employed for cutting. Consequently, cutting length becomes free from restrictions. Also, the band saw 5 is curved toward the direction of the thickness thereof, thereby restricting the return of the saw 5 for the formation of said part 7. Therefore, the fatigue of the band saw 5 is alleviated and overall construction can be made simple.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a band saw machine (also referred to as a band saw) for cutting a workpiece such as a vibrator by circulating an endless band saw blade.

(Prior Art) In a conventional band saw machine, as shown in FIGS. 5 and 6, the rectilinear part b1 on one side of the band saw blade, which is driven in a circular manner, is twisted by a predetermined angle to move straight. Workpiece W was being cut.

(Problem to be Solved by the Invention) In the case of the band saw machine described above, the cutting length of the workpiece W, that is, the distance 1 from the end of the workpiece W to the cutting site, is the same as the length of the cutting length of the workpiece W, that is, the distance 1 from the end of the workpiece W to the cutting site. There was a problem in that the range of the cutting length of the workpiece W could not be extended beyond the limit because it was limited by the interval.

An object of the present invention is to provide a band saw machine that eliminates the above-mentioned problems.

(Means for Solving the Problems) The present invention provides an endless band saw blade that is rotatably hung on a pair of pulleys, and the side surfaces of both rectilinear parts of the band saw blade are aligned in the width direction of the band saw blade. The gist of the present invention is to provide a band saw machine in which the passages of both the straight sections are aligned in the same manner.

(Function) The band saw machine of the present invention aligns the straight-travel portion on the use side and the straight-travel portion on the non-use side of the band saw blade and run them in opposite directions, and causes the straight-travel portion on the non-use side to travel straight on the use side. The cutting machine is configured to cut the workpiece by moving it through the kerf of the workpiece.

(Example) Next, one embodiment of the present invention will be described with reference to the drawings.

The base 1 of the bandsaw machine B is equipped with a clamp-like structure (not shown) for clamping the workpiece W, and a housing 2 with a side face shape is pivotably supported at the rear end so as to be tiltable in the vertical direction. .

A pair of front and rear pulleys 3, 3 are rotatably supported at the front and rear ends inside the housing 2, and the rear pulley 3 is attached to the housing 2.
It is rotationally driven by a motor 4 attached to the side of the.

An endless band saw blade 5, which is rotatably hung around both pulleys 3, is extended between a pair of curved lead parts 6 wound around both pulleys 3 and the hundred curved lead parts 6, respectively. A pair of straight sections 7.7
Both linear parts 7 each have a pair of flanged guide rollers 8 to 8 rotatably supported inside both pulleys 3.
The band saw blades 5 are inserted through the grooves and are forcibly bent in the thickness direction of the band saw blade 5 by each guide roller 8, so that they are arranged vertically in parallel. That is, the band saw blade 5 is guided so that both the straight moving parts 7 run in opposite directions with the side surfaces 7a of both the straight moving parts 7 being aligned in a line with a slight distance in the width direction of the band saw blade 5, and both the straight moving parts 7 The passages 9, 9 of 7 are formed in the same line on the vertical plane 1 passing through the sleeve center of both pulleys 3 or on the same plane parallel to the vertical plane 1, and when cutting the workpiece W, the passages 9, 9 are formed on the use side of the front row. The non-use straight section 7 in the rear row passes through the kerf W1 of the work W cut by the straight section 7, and the work W is cut.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the side surfaces 7a of the bicentennial portion 7 of the endless band saw blade 5, which is rotatably hung around the pair of pulleys 3, are aligned in a line in the width direction of the band saw blade 5. Passage 9 of both straight sections 7
are formed in the same row in the same plane.

Therefore, when cutting the workpiece W, the linear portion 7 on the use side
and the straight-moving part 7 on the non-use side are arranged in a line, and the straight-moving part 7 in the rear row passes through the kerf W1 cut by the straight-moving part 7 in the front row, so when cutting the workpiece with the straight-moving part 7 on the use side. It is possible to eliminate the problem that the cutting length of the workpiece is limited due to the unused linear part coming into contact with a part of the workpiece, and there is an effect that the cutting length of the workpiece W can be set arbitrarily.

In addition, since the band saw blade 5 is curved in the thickness direction to suppress the handling opening and form both straight moving parts 7, the band saw blade 5 can be smoothly rotated and fatigue of the band saw blade 5 can be reduced. reduce,
It not only improves the durability of the band saw blade 5, but also eliminates the problem that the housing, pulleys, etc. of the conventional band saw machine J3 are assembled in an inclined shape due to the use of the band saw blade, which complicates the 'M4 construction. Band saw AI? The overall structure of B can be simplified.

(Effect of application) That is, the present invention aligns the side surfaces of both linear parts of an endless band saw blade that is rotatably hung around a pair of pulleys in a line in the width direction of the band saw blade. By forming the passages of both the straight sections in the same line, it is possible to reduce the cutting angle of the workpiece at t11.
This has the effect that the cutting length can be arbitrarily set by eliminating the limit, and the overall structure of the band saw can be simplified.

[Brief explanation of drawings]

Figures 1 to 4 show one embodiment of the present invention.
The figure is a perspective view of the main parts, Fig. 2 is a side view of the bandsaw machine, Fig. 3 is a side view of the main parts, Fig. 4 is also a plan view, and Fig. 5 is a perspective view showing a conventional band saw blade. FIG. 6 is a view taken along the line A--A in FIG. 5. 3... Pulley 5... Band saw blade 7... Straight section 9... Passage B... Band saw machine

Claims (1)

[Claims] The side surfaces of both straight-travel parts of an endless bandsaw blade, which is rotatably hung around a pair of pulleys, are aligned in a line in the width direction of the band saw blade, so that the passages of both straight-travel parts are aligned in the same line. A band saw machine characterized by a formed shape.