JPH06106501A - Sawing machine - Google Patents

Abstract

PURPOSE:To arbitrarily control a tension to correct a skew of a saw blade to conduct cutting accurately and ideally by preventing a slippage of a saw blade belt. CONSTITUTION:In a sawing machine in which an endless belt-form saw blade 1 spread between pulleys 2, 3 is traveled to conduct cutting by bringing the tension and speed thereof under control by a hydraulic cylinder 6 and drive motors 4, 5, pinch rollers 8, 10 or the like are provided so as to come into pressure contact with the peripheries of the pulleys 2, 3 through the saw blade belt 1. The belt 1 is prevented from slipping by being pressurized by the pinch rollers, thus being arbitrarily adjusted in tension.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sawing machine for cutting wood, metal materials and the like.

[0002]

2. Description of the Related Art A saw machine using a conventional endless belt-shaped saw blade spans a saw blade belt between pulleys, and one pulley is driven by a motor to drive a motor to adjust tension between the pulleys. Is provided, and the tension control and the speed control are controlled as required to move between the pulleys, and the cutting edge portion is brought into contact with the workpiece to perform cutting. During the cutting process, the required stress corresponding to the material and size of the work piece acts between the saw blade and the work piece.Therefore, a driving force that overcomes this stress must be transmitted from the pulley to the saw blade belt. I have to. For this reason, the pulley interval is widened so that an extremely large tension is constantly applied to the saw blade belt so as to eliminate slippage between the pulley and the belt. But,
When it is desired to process with a weak tension in use, the saw blade speed is controlled or the saw blades are aligned to perform this purpose.

FIG. 1 shows a driving state of a saw blade belt 1. The belt 1 is hung between two pulleys 2 and 3, and at least one pulley is rotatably driven as a power train to drive the belt 1.
Is moved at a predetermined speed in the arrow direction, and the cutting blade 1a cuts the workpiece. Belt 1 between pulleys 2 and 3
An extremely strong tension P is applied to prevent the slip. When such a strong tension is applied, the saw blade 1a is bent inward and guided. FIG. 2 is a sectional view taken along the line AA in FIG. 1. Since the blade portion 1a of the saw blade belt 1 is not guided by the pulleys 2 and 3, the blade portion 1a bends so as to be recessed inward by strong tension. If the workpiece 1 is cut by the curved blade 1a, straight cutting cannot be performed, and the blade is broken or worn, and the cutting torque increases and decreases.

The tension P applied between the pulleys 2 and 3
When the blade is lowered, the elongation of the belt 1 disappears, so the blade 1a
However, the slippage between the pulleys 2 and 3 and the belt 1 increases, and the desired driving force cannot be applied. Further, the blade portion 1a is heated by cutting frictional heat during processing and extends, but if this extension occurs, the blade 1a, on the contrary, bends outward from the belt 1 portion. Also in this case, accurate cutting cannot be performed.

[0005]

SUMMARY OF THE INVENTION In view of the above, the present invention eliminates the slippage of the belt, whereby the tension can be arbitrarily controlled, the bending of the saw blade is corrected, and the cutting is always performed accurately. The purpose is to enable processing.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a pinch roller is provided on the outer periphery of a pulley for guiding and driving a saw blade belt, and the pinch roller is pressed against the saw blade belt via the belt to prevent slippage by pressing the pinch roller. Characterize.

[0007]

As described above, according to the present invention, the pinch roller which presses the saw blade belt for guiding and driving the saw blade belt is provided on the outer periphery of the pulley so as to stop the slippage by pressurizing the pinch roller. Can be controlled independently of the non-slip, and any adjustment control can be performed. With this, the bending of the saw blade can always be corrected to the best state, and accurate cutting and efficient cutting can be performed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. FIG. 3 is a side view and FIG. 4 is a front view of the endless belt 1.
The pulleys 2 and 3 which are wound around are driven by motors 4 and 5, respectively, to feed at a predetermined speed. 6 is a hydraulic cylinder that controls the tension of the belt 1, and the piston rod is the pulley 2
Is controlled to adjust the distance between the pulley and another pulley 3.
7 and 8 are pinch rollers pressed against the outer circumference of the pulley 2,
9 and 10 are pinch rollers pressed against the other pulley 3,
The belt 1 is pressed against the pulleys 2 and 3, respectively.

The pressure contact between the pinch rollers 7, 8 and 9, 10 eliminates the slippage between the pulleys 2, 3 and the belt 1, and all the rotational driving force of the motors 4, 5 acts on the belt 1 without loss. It is possible to drive at a required speed and torque by controlling 4 and 5. Further, the tension on the belt 1 is controlled by the hydraulic cylinder 6, which can be controlled independently of the belt drive, and the tension is controlled depending on the bending state of the cutting blade portion 1a so that the blade 1a is always straightened. It can be processed while being processed.

Therefore, it is not necessary to control the tension in order to stop the slippage of the belt 1 as in the conventional case. Therefore, it is possible to prevent the blade 1a from being bent due to an excessive increase in tension, and during processing. Cutting blade frictional heat 1
When a stretches and bends, the bending can be corrected by changing and controlling the tension, and stable cutting can be performed with a saw blade that is always straightly controlled.

Further, since the tension control and the traveling drive can be independently controlled as described above, the belt moving speed can be controlled independently of the tension, and this should always be optimally controlled according to the processing state. You can Therefore, the material of the workpiece,
By controlling the cutting speed according to the size and the like, good and efficient processing can be performed.

The tension control by the hydraulic cylinder 6 can be automatically controlled by the signal while detecting the bending of the blade 1a by an optical detector or the like, and the optimum machining can always be performed while controlling the optimum tension. it can. Further, in the above embodiment, both the pulleys 2 and 3 are driven by the motor to drive the motor. However, one of them can be a driven vehicle. In this case, the driven vehicle example does not have a pinch roller. May be. Further, the tension control device may be configured by a screw, a spring, control by electromagnetic force, or the like alone or in combination.

[0013]

As described above, according to the present invention, the pinch roller which presses the saw blade belt for guiding and driving the saw blade belt is provided on the outer periphery of the pulley, and the sliding is stopped by pressing the pinch roller. The tension control can be controlled independently of the anti-slip, and any adjustment control can be performed, which allows the bending of the saw blade to be always corrected to the best condition for accurate cutting and efficient cutting. it can. Further, since the tension control and the drive speed control can be controlled independently, the speed control of the saw blade belt can be arbitrarily controlled, and can always be optimally controlled according to the processing state, etc., and the cutting processing can be optimized optimally. It produces the effect of being able to do so.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a side view of an embodiment of the present invention.

FIG. 4 is a front view of FIG.

[Explanation of symbols]

 1 Saw blade belt 1a Blade portion 2,3 Pulley 4,5 Drive motor 6 Hydraulic cylinder 7,8,9,10 Pinch roller

Claims (1)

[Claims] 1. A saw machine, in which an endless belt-shaped saw blade is hung between pulleys, and is cut while being moved while controlling tension and speed as required, and a saw blade belt is provided around the outer periphery of the pulley. A saw machine characterized by providing a pinch roller for pressure contact to separate the tension of the saw blade and the power supply.