JP3700466B2 - Cutting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting machine having a dust collection mechanism for collecting chips generated during cutting .
[0002]
[Prior art]
As a conventional dust collection mechanism, for example, there is JP-A-10-180713. In this mechanism, by rotating a fan provided separately from the cooling fan of the motor, chips generated at the time of cutting are conveyed to the chip discharge port while being stirred by the fan through the chip guide path.
[0003]
[Problems to be solved by the invention]
In the conventional dust collection mechanism, the dust collection capacity varies depending on the size of the cutting material and the cutting conditions such as the inclination and angle cutting of the cutting blade. For example, when a small material with a low height is cut, the distance from the chip guide path increases, and chips that cannot be collected by the fan are scattered behind and around the cutting machine.
[0004]
Therefore, if you have another dust collector, set the dust collector near the cutting machine during cutting work, and suck the chips scattered around the cutting machine during cutting, or after cutting work, The dust scattered around was sucked up by a dust collector. Moreover, when the dust collector was not owned, it was very troublesome because the operator himself cleaned it with a broom after cutting work.
[0005]
An object of the present invention is to eliminate the above-mentioned conventional drawbacks, increase dust collection efficiency during cutting, and facilitate cleaning of chips scattered around the cutting machine after the cutting operation.
[0006]
[Means for Solving the Problems]
The purpose of the above is to provide a chip guide path in the cutting tool body and a chip discharge port at its tip, hold the radial fan in a cantilevered manner between the chip guide path and the chip discharge port, and rotate freely from the center of rotation of the radial fan. This is achieved by providing the cutting blade body with a hole penetrating to the outside of the cutting blade body and detachably attaching a dust collecting hose to the hole portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1, 2, 10, and 11. 1 is a side view of the cutting machine, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 10 is a partial front view of the cutting machine, and FIG. 11 is a partial rear view of the cutting machine. In the present embodiment, a tabletop cutting machine will be described as an example of the cutting machine.
[0008]
In the figure, a turntable 2 is embedded in the center of the base 1 so as to be rotatable in the horizontal direction, and the upper surface of the turntable 2 is flush with the upper surface of the base 1. A cutting material 40 such as wood is placed on the upper surfaces of the base 1 and the turntable 2. The fence 3 that supports the side surface of the cutting material 40 is fixed to the upper surface of the base 1. In addition, a blade edge plate (not shown) having a groove portion into which a cutting blade 10 to be described later enters at the center is fixed on the upper surface of the turntable 2, and the lower end of the cutting blade 10 is lower than the upper surface of the turntable 2 when cutting the cutting material 40. When descending, it penetrates into the groove portion of the blade plate and plays the role of preventing the cutting material 40 from standing on the finished surface. A holder 5 is erected on the rear end of the turntable 2 via a holder shaft 4, and the holder 5 is positioned so that the axial center of the holder shaft 4 substantially coincides with the upper surface of the turntable 2. It is pivotally supported by a fulcrum so that it can tilt right and left around the upper surface of the turntable 2.
[0009]
As shown in FIG. 11, a long hole 5 a centering on the holder shaft 4 is formed from the rear part of the holder 5, the clamp lever 6 is passed through the long hole 5 a, and a screw part formed at the tip of the clamp lever 6 is turned. It is screwed into a screw hole formed on the back surface of the table 2. When the clamp lever 6 is loosened, the holder 5 is tilted within the range of the elongated hole 5a with the holder shaft 4 as a fulcrum, and when the clamp lever 6 is tightened, the holder 5 is tightened between the turntable 2 and the clamp lever 6 to an arbitrary position. It is fixed with. The long hole 5a is formed within a range in which the holder 5 can be tilted 45 degrees to the left and right.
[0010]
A cutting blade body 8 is pivotally supported above the holder 5 via a shaft 7 so as to be swingable up and down with respect to the upper surface of the base 1. A spring 9 is provided between the holder 5 and the cutting blade body 8 to urge the cutting blade body 8 upward. The cutting blade body 8 includes a cutting blade shaft 16, a cutting blade 10 such as a circular saw, a gear case 12 integrated with a cover 11 covering the upper half of the cutting blade 10, and a cooling fan 13 a that rotationally drives the cutting blade 10. The motor 13 includes a motor 13, a motor shaft 14 of the motor 13, a transmission belt 23, a motor housing 15 that covers and supports the motor 13, and a handle 18.
[0011]
As shown in FIG. 2, a cutting blade shaft 16 is horizontally provided below the gear case 12, and the cutting blade shaft 16 is rotatably supported by a bearing 17. One end of the cutting blade shaft 16 is cut by a bolt 19. A pulley 20 that fixes the blade 10 and transmits power to the cutting blade shaft 16 is provided. A motor housing 15 is provided above the gear case 12, and a motor 13 that rotationally drives the cutting blade 10 is provided therein. A pulley 22 is provided at the tip of the motor shaft 14 rotatably supported by the bearing 21 so as to be positioned above the pulley 20. A transmission belt 23 is stretched between the pulleys 20 and 22. The power of the motor 13 is transmitted from the motor shaft 14 to the cutting blade 10 via the pulley 22, the transmission belt 23, the pulley 20, and the cutting blade shaft 16 by the transmission belt 23.
[0012]
As shown in FIG. 10, a V-shaped protrusion 5b is mounted on the front surface of the holder 5, and stopper bolts 34, 35 are vertically positioned on the rear surface of the turntable 2 so as to be positioned on the movement locus of the protrusion 5b. Screwed in the direction. When the holder 5 is tilted, the projection 5b is engaged with the head of the stopper bolt 34 or the stopper bolt 35 at a predetermined tilt angle, and the tilt position of the cutting blade body 8 is set. Normally, the stopper bolts 34 and 35 are provided so as to engage with the protrusion 5b when the holder 5 is inclined at a 45 degree position in the left-right direction.
[0013]
Next, the dust collection mechanism will be described with reference to FIGS. 3 is a partial sectional side view of the cutting machine, FIG. 4 is a partial sectional side view of the cutting machine, FIG. 5 is a side view of the cutting machine with a cap attached to the hole, and FIG. FIG.
[0014]
A chip guide path 24 is provided behind the cutting blade 10 in the gear case 12, and is always positioned behind the cutting blade 10 as the cutting blade body 8 swings. A fan storage chamber 25 is provided at the end of the chip guide path 24 in the horizontal direction (right side in FIG. 6), and the end of the chip guide path 24 and the fan storage chamber 25 are communicated with each other through a circular opening 27. A fan 28 is provided in the fan storage chamber 25, and the back side of the fan 28 is rotatably attached to the gear case 12 via a bearing 29 to support the fan 28 in a cantilever manner. The front side of the fan 28 is positioned at the opening 27 and is opened, and the center of the opening 27 and the rotation center of the fan 28 are made to coincide. The fan 28 generally has a shape called a radial fan, and airflow is generated from the front side of the fan 28 toward the outer periphery. The pulley 30 provided on the back surface of the fan 28 and the pulley 22 provided on the motor shaft 14 side are connected by a poly V belt 36 to transmit power to the fan 28. A chip discharge port 26 for guiding and discharging chips out of the cutting blade body 8 is provided behind the fan storage chamber 25.
[0015]
A hole 33 for attaching the dust collecting hose 31 is provided from the side of the cover 11 on the side of the fan housing chamber 25 toward the opening 27, and the attachment port 31 a of the dust collecting hose 31 can be detachably connected to the hole 33. it can. When the dust collection hose 31 is not connected, as shown in FIG. 5, a cap 32 or the like is fitted in the hole 33 and the hole 33 is closed, so that the dust collection hose 31 can be used in the same manner as a conventional dust collection mechanism. Further, a dust collection bag is usually attached to the chip discharge port 26, and the collected chips are accumulated in the dust collection bag.
[0016]
In the above configuration, when cutting the cutting material 40 shown in FIG. 1, first, the handle 18 of the cutting blade body 8 is gripped, the cutting blade body 8 is swung downward, and the cutting material 40 is cut. At this time, the generated chips pass through the chip guide path 24 from the inside of the cover 11 as shown in FIG. 3, and are sucked from the vicinity of the center on the front side of the fan 28 through the opening 27. Then, as shown in FIG. 4, the air is guided to each blade of the fan 28, discharged to the outer peripheral side of the fan 28, conveyed to the chip discharge port 26 while being guided to the inner wall of the fan storage chamber 25, and discharged out of the cutting blade body 8. Is done. The discharged chips are collected by, for example, a dust collection bag attached to the chip discharge port 26. Further, the chips scattered around the cutting machine without being fully collected are sucked into the suction port 31b of the dust collection hose 31 and transferred to the chip discharge port 26 through the fan storage chamber 25.
[0017]
If the semi-cylindrical portion 31 c is formed in the attachment port 31 a of the dust collection hose 31 as shown in FIG. 7, the chip guide path 24 and the fan storage chamber 25 can be opened and closed depending on the attachment state of the dust collection hose 31. For example, when cutting, by attaching the semi-cylindrical portion 31c of the dust collecting hose 31 to the position D shown in FIG. 8, the space between the chip guide path 24 and the fan storage chamber 25 is opened, and chips are collected from the chip guide path 24. It is sucked in from the suction port 31 b of the hose 31 and conveyed to the chip discharge port 26. At the time of cleaning after the cutting operation, the semi-cylindrical portion 31c of the dust collecting hose 31 is attached to the position E shown in FIG. 9 so that the chip guide path 24 and the fan storage chamber 25 are closed, and the dust collecting hose 31 is closed. Is sucked only from the suction port 31 b and is discharged to the chip discharge port 26 through the fan storage chamber 25. Thereby, the dust collection mechanism of a cutting machine can be utilized also as a dust collector at the time of cleaning work. Therefore, dust collection efficiency similar to that when a dedicated dust collector is used can be obtained with an inexpensive configuration in which the holes 33 are provided. In addition, since a dedicated dust collector is not used, the trouble of setting and cleaning up the dust collector can be saved.
[0018]
The present invention can also be applied to a slide-type cutting machine in which the cutting blade body 8 is provided so as to be movable back and forth.
[0019]
【The invention's effect】
According to the present invention, by providing the hole connected to the fan and attaching the dust collecting hose to the hole, the chips scattered around the cutting machine can be collected and used for cleaning after the cutting operation. Therefore, it is possible to efficiently collect chips without using a dedicated dust collector.
[Brief description of the drawings]
FIG. 1 is a side view of a cutting machine showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a partial cross-sectional side view of a cutting machine.
FIG. 4 is a partial cross-sectional side view of a cutting machine.
FIG. 5 is a side view of the cutting machine showing a state where a lid is attached to the hole.
6 is a cross-sectional view taken along line BB in FIG.
FIG. 7 is a perspective view of the tip of the dust collection hose.
8 is a sectional view taken along line BB in FIG.
9 is a cross-sectional view taken along the line BB of FIG. 1 showing a state where the dust collection hose is rotated.
FIG. 10 is a partial front view of the cutting machine.
FIG. 11 is a partial rear view of the cutting machine.
DESCRIPTION OF SYMBOLS 8 ... Cutting blade main body, 10 ... Cutting blade, 11 ... Saw cover, 13 ... Motor, 24 ... Chip guideway, 25 ... Fan storage chamber, 26 ... Chip discharge port, 27 ... Opening, 28 ... Fan, 31 ... Dust collection hose, 31a ... attachment port, 31b ... suction port, 31c ... semi-cylindrical part, 32 ... cap, 33 ... hole, 40 ... cutting material.

Claims (1)

A base on which a cutting material is placed on an upper surface, and a cutting blade body swinging up and down with respect to the upper surface of the base, the cutting blade body including a cutting blade and a motor unit for driving the cutting blade; In the cutting machine capable of cutting the cutting material by swinging the cutting blade body downward with respect to the upper surface of the base, the cutting blade body is provided with a chip guide path and a chip discharge port at the tip thereof, and a chip guide path A radial fan is supported by a cantilever between the nozzle and the chip discharge port, and the hole that penetrates from the center of rotation of the radial fan to the outside of the cutting blade body is provided in the cutting blade body. A dust collecting hose is attached to and detached from the hole portion. mounted for, and the tip portion of said population dust hose into a semi-cylindrical shape, rotatably mounted on the hole portion, so that can be opened and closed between said chip guide path and the chip discharge port by mounting state of the dust collection hose Cutting machine, characterized in that the.

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