JP2003266401A - Cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter which can efficiently cut even at a dark place by solving the problem of a conventional cutter which cannot efficiently work cutting by using a portable cutter, for example, at a dark place at night or the like since a cutting edge and a marking ink line guide are particularly hard to be observed. <P>SOLUTION: The cutter 1 comprises a base 2 brought into contact with a cutting material W, and a cutter body 3 supported to the base 2. The body 3 has a cutting blade 22 for cutting the material W, an illuminator 52 for a cutting edge to illuminate cutting site of the material W by the blade 22, and an illuminator 54 for a marking ink line guide to illuminate the marking ink line guide provided at the base 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a portable cutting machine such as a circular saw, and particularly a cutting machine used for cutting a masonry board, which is provided with an illuminating device capable of illuminating a dark part brightly. Regarding cutting machine.

[0002]

2. Description of the Related Art Heretofore, an illumination device of this type has been disclosed in, for example, Japanese Patent Application Laid-Open No. 11-170203. This conventional lighting device is a front side of a cutting machine body and a cutting site (a front end of a cutting blade, a site where a cutting material is actually cut by a cutting edge, the same applies hereinafter), that is, An illumination tool is arranged on a tilt support portion for mounting the cutting machine main body on a base so that tilting can be adjusted, and the cutting site is illuminated by the illumination tool from the back side (motor case side). By brightly illuminating the cutting site with this lighting tool, the worker can efficiently and accurately perform the cutting work while visually confirming the position of the cutting edge of the cutting blade with respect to the smear line even in a dark place.

[0003]

By the way, in a dust-proof type cutting machine used for cutting masonry boards, etc., a blade case covering a cutting blade is provided with a cylindrical connection port, and a hose of a dust collector is connected to the connection port. Then, the dust generated by cutting is forcibly sucked and collected in the dust collector. In such a dust-proof cutting machine, the cutting blade is almost completely covered by the blade case in order to improve the dust collection efficiency. However, in actual work, it is necessary to move while checking the position of the cutting edge of the cutting blade with respect to the smear line, so at the front end side of the cutting machine in the cutting movement direction, the front side of the blade case (the side opposite to the motor case). ) Is provided with an opening so that the cutting edge of the cutting blade and the smear line can be seen through the opening. Therefore, the illumination device described in the publication in which the cutting portion is illuminated from the back side (motor case side) of the blade case cannot be applied to a dust-proof cutting machine having a structure in which the back side of the blade case is closed. is there.

The present invention has been made in view of the above-mentioned conventional problems, and the purpose thereof is, in particular,
An object of the present invention is to provide a cutting machine equipped with a lighting device suitable for a dust-proof cutting machine.

[0005]

In order to achieve the above object, a cutting machine according to the present invention has a configuration as described in each claim of the claims. In the cutting machine according to the first aspect, the illumination device illuminates the cutting edge of the cutting blade in the blade case from the front in the cutting movement direction through the visual recognition portion. The visible portion includes a transparent cover. Thus, the cutting edge of the cutting blade and its surroundings can be illuminated brightly, so that the operator can perform the cutting operation while confirming the position of the cutting edge of the cutting blade with respect to the smear line even in a dark place. In particular, because the blade edge of the cutting blade is illuminated from the front in the cutting movement direction, the visually recognizable portion formed on the blade case to see the blade edge of the cutting blade is dust-proof because it is restricted in size and position due to the dust-proof relationship. Effective when applied to a cutting machine.

In a cutting machine according to a second aspect of the present invention, an illuminating device includes an illuminating device, an illuminating switch for turning on or off the illuminating device, and a wiring for connecting the illuminating device and the illuminating switch to each other. It is made up of an assembled assembly. Therefore, assuming that the lighting device is assembled to the blade case, for example, when the lighting device is removed from the blade case for exchanging the cutting blade, the assembly is easily performed because the assembly is an assembly process. be able to.

In the cutting machine according to the third aspect of the invention, the illuminating device is provided with an illuminating device for illuminating a Sumi-line guide provided on a base supporting the blade case.
When such a configuration is adopted, it is possible to perform the cutting work while watching not only the cutting edge of the cutting blade but also the score line guide. That is, the worker can perform the cutting work while appropriately checking the cutting edge or the score line guide according to the working situation.

Further, in the cutting machine according to the fourth aspect, the operator has a handle to be grasped, and the assembly extends from the handle to the front side of the blade case in a state of being attached to the handle. At the same time, it is configured to be integrated through an extension member that extends further downward. As a result, a rational arrangement of the lighting switch and the lighting equipment becomes possible. That is, it is possible to arrange the lighting switch near the handle gripped by the operator during cutting work to improve the operability thereof, and the lighting fixture can be arranged near the blade edge to be illuminated. Further, since the assembly is attached to the handle, the cover member of the blade case can be removed for exchanging the cutting blade with the assembly still attached to the handle.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
It will be described with reference to FIG. 1 is a front view of a cutting machine according to the present embodiment, FIG. 2 is a plan view, and FIG. 3 is a side view showing a part of the cutting machine. The cutting machine 1 of the present embodiment is a dust-proof type circular saw used for cutting masonry boards and the like, and supports a base 2 to be brought into contact with a cutting material W and a tiltable left and right direction with respect to the base 2. The cutting machine body 3 that has been cut, the cutting portion (the front end portion of the cutting blade 22 where the cutting material W is actually cut by the cutting edge, the same applies hereinafter), and the guide portion (sumi line guide) for sumi line alignment. An illumination device 5 for cutting work is provided for brightly illuminating 4a, 4b).
In addition, in this specification, the cutting direction means a direction in which the cutting machine 1 moves in a cutting operation, and a direction in which the cutting progresses. Therefore, the right side in FIGS. 1 and 2 is the cutting direction.

At the front end of the base 2 (right end in the figure),
Sumi-wire guides 4a and 4b are provided. In this example,
Two types are set: a sumi wire guide 4a for right-angle cutting and a sumi wire guide 4b for oblique cutting at 45 °. The base 2 is placed on the upper surface of the cutting material W, and the cutting machine 1 is moved while aligning the sumi wire guide 4a (or 4b) with a sumi line (not shown) drawn on the upper surface of the cutting material W in advance. By doing so, the cutting edge can be moved along the sumi line, whereby the cutting material W can be cut at a right angle (or inclined cut at 45 °) along the sumi line. Right angle cutting is performed by making the cutting blade 22 orthogonal to the cutting material W, and
Inclined cutting is performed at 45 ° by inclining at 5 °. The cutting blade 22 is tilted by tilting the cutting machine body 3 with respect to the base 2.

The cutting machine body 3 is supported so as to be tiltable to the left and right in the cutting direction via tilting support portions F and R provided at two positions, a front portion and a rear portion of the base 2. A front tilt support portion F is provided on the front portion of the base 2 and on the rear side of the score line guides 4a and 4b. This front tilt support F
Includes a tilting base 6 which is provided so as to rise upward from the upper surface of the base 2. A tilt bracket 8 is provided on the rear surface side of the tilt base 6 so as to be vertically tiltable via a tilt shaft 7. As shown in FIG. 1, the tilting position of the tilting bracket 8 with respect to the tilting base 6 is fixed by tightening a fixing nut (not shown) with a knob 8b onto a fixing bolt (not shown) provided on the tilting bracket 8. It As shown in FIG. 2, the tilting bracket 8 is provided on the tilting tip end side with two support edge portions 8a, 8a so as to project to the rear side in a state of being parallel to each other. Both support edges 8
A tilting arm portion 29 provided at the front end of the cutting machine body 3 is supported between a and 8a via a support shaft 9 so as to be vertically tiltable. The tilting shaft 7 is arranged so that its axis is orthogonal to the supporting shaft 9.

On the other hand, at the rear portion of the base 2, as shown in FIG. 1, a rear tilt support portion R is provided. The rear tilt support portion R is the tilt base 1 fixed to the upper surface of the base 2.
It has 0. The tilting base 10 has a support shaft 11
The guide bracket 12 is attached via the so as to be tiltable rightward in the cutting direction. The rear support shaft 11 is arranged coaxially with the front tilt shaft 7. As shown in FIG. 2, the guide bracket 12 is fixed to the blade case 20 by tightening a fixing nut 15 with respect to a fixing bolt 13 attached to the back side of the blade case 20. The fixing nut 15 can be tightened and loosened with respect to the fixing bolt 13 by rotating the lever 14 up and down. As shown in FIG. 1, the guide bracket 12 has a vertically elongated arc-shaped guide groove 12a.
Is provided. The guide bracket 12 is fixed to the back surface of the blade case 20 of the cutting machine body 3 via the guide groove 12a. The front tilt bracket 8 is supported so as to be vertically tiltable about the tilt shaft 7, and the rear guide bracket 12 is supported so as to be tilted to the left and right in the cutting direction about the support shaft 9. The main body 3 of the cutting machine can be tilted to the left and right with respect to the cutting direction, whereby the inclination angle of the cutting blade 22 with respect to the cutting material W can be changed to perform right-angle cutting or tilt cutting. Further, in a state where the fixing nut 15 is loosened, the cutting machine body 3 is tilted up and down about the support shaft 9 on the front side to change the protrusion amount of the cutting blade 22 from the lower surface of the base 2 to thereby cut the cutting blade 22. The so-called cutting depth of the cutting material W can be changed.

Next, the cutting machine main body 3 is provided with a blade case 20 for covering the cutting blade 22 and a motor case 21 having a drive motor built therein. The blade case 20 includes a gear case portion 20a and a cover member 20b arranged on the front side of the gear case portion 20a.
The motor case 21 is abutted against 0a, and the blade case 20 and the motor case 21 are joined by a fixing bolt 50c (see FIG. 3). The output of the drive motor built in the motor case 21 is decelerated by the gear train built in the gear case portion 20a and output as the rotation of the circular cutting blade 22. The tilting arm part 29 described above is provided below the gear case part 20a.
9 is formed so that it may protrude toward the front. The cutting blade 22 is located inside the blade case 20,
On the upper surface side of the base 2, the rear surface side is the gear case portion 20.
It is covered with a and the motor case 21, and the front side and the outer peripheral side are covered with the cover member 20b. The lower end of the cover member 20b faces the upper surface of the base 2 with a predetermined gap, as shown in FIG. As a result, an opening 20c is formed in the lower portion of the cover member 20b, and an operator can see the cutting edge of the cutting tip of the cutting blade 22 and the smear line through the opening 20c. The above-mentioned opening 20c corresponds to the visual recognition portion in the present invention.

Further, the cover member 20b is formed in an L-shaped cross section having an arcuate peripheral edge cover portion projecting toward the back surface on the outer peripheral portion. Then, as shown in FIG. 3, the cover member 20b has a peripheral edge cover portion abutted against an externally protruding base portion 20d integrally formed with the gear case portion 20a, and a screw hole of the base portion 20d. Fixing bolt 20 with knob 20e screwed into
It is fixed by f. Therefore, the fixing bolt 20f
By removing the cover member 20b, the cover member 20b can be removed from the gear case portion 20a. With the cover member 20b removed, the front side of the cutting blade 22 is exposed and the cutting blade 22
Replacement work is possible.

The lower half of the cutting blade 22 is covered with a safety cover 23 that can be opened and closed. The safety cover 23 rotates upward during the cutting operation, so that the range of the cutting blade 22 protruding toward the lower surface of the base 2 is exposed. Further, a dust suction cylinder portion 20g extending upward is integrally formed at a front end portion of the cover member 20b, and a cylindrical connection cylinder 20h is attached to an upper end portion of the cylinder portion 20g. There is. The cylindrical portion 20g and the connecting cylinder 20h form a suction port along the tangential direction of the cutting blade 22. And, at the time of cutting work, the connecting tube 2
A dust collector is connected to 0h via a hose 24, and the dust generated by the disconnection is collected by the dust collector.

The motor case 21 has a substantially C-shaped main handle 2 which extends obliquely rearward from the upper surface and reaches the rear surface.
5 (corresponding to the handle in the present invention), which is on the front side of the main handle 25,
The grip portion 26 is provided so as to project forward from the front surface of the. A main switch 27a, which is turned on and off by a trigger 27 for starting and stopping the drive motor, is arranged on the inner peripheral side of the main handle 25. Further, a power cord 28 is drawn into the rear portion of the main handle 25. Therefore, the operator can move the cutting machine 1 in the cutting direction while firmly holding the main handle 25 with one hand and the grip portion 26 with the other hand to firmly support the cutting machine 1 with both hands.

The illuminating device 5 includes a translucent resin case 51.
A substrate 53 in which an illuminator 52 for illuminating the cutting edge of the cutting blade 22 is mounted, and an illuminator 5 for illuminating the smear line guides 4a and 4b.
The board 55 on which the No. 4 is mounted, the lighting switch 56 for turning on and off both the lighting devices 52, 54, and the wiring (not shown) for connecting them to each other are housed and integrated. That is, the illumination device 5 is an assembly. In the present embodiment, light emitting diodes (LEDs) are used for the illuminators 52 and 54. The drive power of the cutting machine 1 obtained from the power cord 28 is diverted to the power source of the lighting device 5.

The case 51 of the lighting device 5 is shown by a thick line in each drawing. As illustrated, the case 51 is arranged between the motor case 21 and the blade case 20 to the front surface of the blade case 20. That is,
The case 51 is the gear case portion 20 of the blade case 20.
The upper part of the outer periphery of a and the main handle 25 of the motor case 21
A substantially L-shape (see FIG. 1) having a horizontal portion 51a extending substantially horizontally in the front-rear direction (cutting direction) and a vertical portion 51b vertically extending downward along the front surface of the cover member 20b.
Is formed in. Case 51 arranged in this way
Is fixed to the main handle 25 by mounting bolts 51c, as shown in FIG. That is, the lighting device 5 of the present embodiment is an external type to the main handle 25 of the motor case 21, and can be removed as needed. The case 51 described above corresponds to the extension member in the present invention.

At the rear end of the horizontal portion 51a of the case 51,
A lighting switch 56 is arranged, a lighting tool 52 for illuminating the cutting edge is arranged at the lower end of the vertical portion 51b, and a lighting tool 54 for guiding the smear lines is arranged on the upper side. That is, by arranging the lighting switch 56 near the trigger 27 of the main handle 25, the lighting switch 56 can be operated at hand,
The operability is improved. Further, as shown in FIGS. 1 and 3, the illuminator 52 for illuminating the cutting edge is attached to the front of the cutting edge of the cutting blade 22 and to the side of the front surface side of the cover member 20b in an inclined manner. By arranging
Light is radiated from above the opening 20c toward the cut portion from diagonally above. In order to cope with the irradiation from the obliquely upper side, in the present embodiment, a part of the lower end of the front surface of the cover member 20b of the blade case 20 is cut out, and a part of the illuminator 52 is inserted into the cutout 20j. However, the illumination by light is secured. In FIG. 1, the cleavage site is indicated by arrow C.

Further, the illuminating device 54 for the guide line illumination
As shown in FIG. 1, the lamps are mounted so as to be inclined so that the light is directed obliquely from above the head of the tilting base 6 toward the smear line guides 4a and 4b. In FIG.
Illumination directions of the illuminators 52 and 54 are indicated by white arrows. In addition, the illuminator 54 for the guide line illumination is
Compared to the illuminator 52 that illuminates the cut portion C, the object to illuminate is farther from the illuminator 52. In addition, the vertical lines (vertical surfaces) of the sumi-ray guides 4a and 4b are cut (inclined) at an angle corresponding to the mounting angle of the illuminator 54 so that the sumi-rays are not hidden by the shadow of the light of the illuminator 54. There is.

The cutting machine 1 of the embodiment configured as described above
According to the above, when the illumination switch 56 provided near the main handle 25 is turned on, the illuminators 52 and 54 arranged on the upper and lower portions of the front surface of the blade case 20 are turned on.
The light of the illuminator 52 is directed to the cut portion C, and the light of the illuminator 54 is directed to the smear line guides 4a and 4b. Therefore, the cutting site C and its periphery and the smear line guides 4a and 4b.
And its surroundings are illuminated at the same time. As a result, even when the cutting operation is performed in a dark place, for example, both the cutting site C and the sumi-ray guides 4a and 4b are illuminated brightly, so that the operator visually recognizes the position of the cutting edge with respect to the smi-lines at the cutting site C. The cutting work can be done easily and accurately while checking, and the sumi wire guide 4a (or 4b)
It is possible to make a right angle cut (or a 45 ° angle cut) while visually observing the position with respect to the smear line.

In this case, in the present embodiment, the illuminating tool 52 for illuminating the cutting edge is arranged in front of the cutting blade 22 and the cutting edge is irradiated through the opening 20c on the front side of the blade case 20. It is possible to provide a suitable lighting device 5 corresponding to a dust-proof cutting machine having no opening on the back surface side of the blade case 20. Further, according to the present embodiment, with the lighting device 5 still attached to the main handle 25, the cover member 20b of the blade case 20 is removed from the gear case portion 20a, and the cutting blade 2
2 can be exchanged. Therefore, the replacement work of the cutting blade 22 can be easily performed. Further, since the lighting device 5 has an assembly structure in which all the constituent elements including the lighting switch 56 are housed in the case 51, the wiring can be easily routed, and when it is necessary to remove the wiring from the cutting machine 1. However, the removal can be easily performed. Even if a configuration is adopted in which the blade case 20 is attached to the cover member 20b, the attachment / detachment is simplified because it is an assembly.

The present invention is not limited to the illustrated embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment described above, two sets of illuminators 52, one for the cutting edge and one for the Sumi-line guide,
Although the case where 54 is provided has been described, the configuration may be such that one lighting unit is provided and at least the cut portion C is illuminated. Further, two sets of illumination switches may be arranged so that the illuminating tools 52 and 54 for the cutting edge and the umi line guide can be turned on and off independently. Further, as the power source of the illumination device 5, the configuration in which the power source for driving the cutting machine is diverted is illustrated, but, for example, a dry battery or the like may be separately used as the power source. Further, although the illuminators 52 and 54 are configured by the light emitting diode (LED), they are not limited to the light emitting diode (LED) and may be changed to a normal miniature light bulb. Further, although the lighting device 5 is attached to the main handle 25 of the motor case 21,
The blade case 20 is not limited to this. Further, in the present embodiment, the opening 20c is formed as a visible portion through which the operator can see the cutting edge of the cutting blade 22, over substantially the entire cutting direction of the cover member 20b.
It suffices if there is at least a portion where the cutting edge of the tip in the cutting movement direction can be visually recognized. In short, it suffices that the operator can see it, and the part or the whole of the cover member 20b may be formed of the transparent resin. Further, in the present embodiment, the case of the dust-proof type cutting machine which is used by connecting with the dust collector and the hose has been described, but it may be applied to a type of cutting machine provided with a dust box for collecting dust, and is not always required. It is not limited to the dust collector type cutting machine.

[0024]

As described in detail above, according to the present invention,
It is possible to provide a cutting machine equipped with an illumination device suitable for a dust-proof cutting machine.

[Brief description of drawings]

FIG. 1 is a front view of a cutting machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the cutting machine.

FIG. 3 is a side view of the cutting machine similarly showing a part of the cutting machine.

[Explanation of symbols]

C ... Cleavage site 1 ... Cutting machine 2 ... Base 3… Cutting machine body 4a ... Sumi wire guide (for right-angle cutting) 4b ... Sumi wire guide (for 45 ° inclined cutting) 5 ... Lighting device 52 ... Lighting equipment (for cutting edge) 54 ... Lighting equipment (for Sumi line guide) 20 ... Blade case 20a ... Gear case part 20b ... Cover member 21 ... Motor case 22 ... Cutting blade 25 ... Main handle

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[Procedure amendment]

[Submission date] March 5, 2003 (2003.3.5)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Cutting machine

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a portable cutting machine such as a circular saw, and particularly a cutting machine used for cutting a masonry board, which is provided with an illuminating device capable of illuminating a dark part brightly. Regarding cutting machine.

[0002]

2. Description of the Related Art Heretofore, an illumination device of this type has been disclosed in, for example, Japanese Patent Application Laid-Open No. 11-170203. This conventional lighting device is a front side of a cutting machine body and a cutting site (a front end of a cutting blade, a site where a cutting material is actually cut by a cutting edge, the same applies hereinafter), that is, An illumination tool is arranged on a tilt support portion for mounting the cutting machine main body on a base so that tilting can be adjusted, and the cutting site is illuminated by the illumination tool from the back side (motor case side). By brightly illuminating the cutting site with this lighting tool, the worker can efficiently and accurately perform the cutting work while visually confirming the position of the cutting edge of the cutting blade with respect to the smear line even in a dark place.

[0003]

By the way, in a dust-proof type cutting machine used for cutting masonry boards, etc., a blade case covering a cutting blade is provided with a cylindrical connection port, and a hose of a dust collector is connected to the connection port. Then, the dust generated by cutting is forcibly sucked and collected in the dust collector. In such a dust-proof cutting machine, the cutting blade is almost completely covered by the blade case in order to improve the dust collection efficiency. However, in actual work, it is necessary to move while checking the position of the cutting edge of the cutting blade with respect to the smear line, so at the front end side of the cutting machine in the cutting movement direction, the front side of the blade case (the side opposite to the motor case). ) Is provided with an opening so that the cutting edge of the cutting blade and the smear line can be seen through the opening. Therefore, the illumination device described in the publication in which the cutting portion is illuminated from the back side (motor case side) of the blade case cannot be applied to a dust-proof cutting machine having a structure in which the back side of the blade case is closed. is there.

The present invention has been made in view of the above-mentioned conventional problems, and the purpose thereof is, in particular,
An object of the present invention is to provide a cutting machine equipped with a lighting device suitable for a dust-proof cutting machine.

[0005]

Therefore, the cutting of the present invention
The machine has the configuration described in claim 1. This cutting machine
According to the report, both the cutting site and the sumi-ray guide
It is brightly illuminated by the lighting fixtures, so the worker
Depending on the position of the cutting edge
You can perform cutting work accurately and easily while visually checking.
Not only the position of the guide
The cutting work can be done visually.

In the cutting machine according to claim 1, the illumination tool illuminates the cutting edge of the cutting blade in the blade case from the front in the cutting movement direction through the visual recognition portion,
Since it is possible to illuminate the cutting edge of the cutting blade and its surroundings brightly, the worker can perform the cutting work while confirming the position of the cutting edge of the cutting blade with respect to the smear line even in a dark place. In particular, because the blade edge of the cutting blade is illuminated from the front in the cutting movement direction, the visually recognizable portion formed on the blade case to see the blade edge of the cutting blade is dust-proof because it is restricted in size and position due to the dust-proof relationship. Effective when applied to a cutting machine. The visible portion includes a transparent cover.

Further, a lighting fixture, was a light switch for turning on or off the lighting device, and a wiring for connecting the light fixtures and lighting switches mutually integrated assembly
Assuming the case where the lighting device is assembled to the blade case by using the lighting device of the type , for example, when the lighting device is removed from the blade case for replacement of the cutting blade, it is assembled. The attachment / detachment work can be easily performed.

Further, in the cutting machine according to claim 1,
A handle gripped by an operator, and the assembly, when attached to the handle, extends from the handle to the front side of the blade case and further extends downward through an extension member. with the structure are integrated Te, light switch, a reasonable arrangement of the illumination device becomes possible. That is, it is possible to arrange the lighting switch near the handle gripped by the operator during cutting work to improve the operability thereof, and the lighting fixture can be arranged near the blade edge to be illuminated. Also,
Since the assembly is attached to the handle, the cover member of the blade case can be removed for exchanging the cutting blade with the assembly still attached to the handle.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
It will be described with reference to FIG. 1 is a front view of a cutting machine according to the present embodiment, FIG. 2 is a plan view, and FIG. 3 is a side view showing a part of the cutting machine. The cutting machine 1 of the present embodiment is a dust-proof type circular saw used for cutting masonry boards and the like, and supports a base 2 to be brought into contact with a cutting material W and a tiltable left and right direction with respect to the base 2. The cutting machine body 3 that has been cut, the cutting portion (the front end portion of the cutting blade 22 where the cutting material W is actually cut by the cutting edge, the same applies hereinafter), and the guide portion (sumi line guide) for sumi line alignment. An illumination device 5 for cutting work is provided for brightly illuminating 4a, 4b).
In addition, in this specification, the cutting direction means a direction in which the cutting machine 1 moves in a cutting operation, and a direction in which the cutting progresses. Therefore, the right side in FIGS. 1 and 2 is the cutting direction.

At the front end of the base 2 (right end in the figure),
Sumi-wire guides 4a and 4b are provided. In this example,
Two types are set: a sumi wire guide 4a for right-angle cutting and a sumi wire guide 4b for oblique cutting at 45 °. The base 2 is placed on the upper surface of the cutting material W, and the cutting machine 1 is moved while aligning the sumi wire guide 4a (or 4b) with a sumi line (not shown) drawn on the upper surface of the cutting material W in advance. By doing so, the cutting edge can be moved along the sumi line, whereby the cutting material W can be cut at a right angle (or inclined cut at 45 °) along the sumi line. Right angle cutting is performed by making the cutting blade 22 orthogonal to the cutting material W, and
Inclined cutting is performed at 45 ° by inclining at 5 °. The cutting blade 22 is tilted by tilting the cutting machine body 3 with respect to the base 2.

The cutting machine body 3 is supported so as to be tiltable to the left and right in the cutting direction via tilting support portions F and R provided at two positions, a front portion and a rear portion of the base 2. A front tilt support portion F is provided on the front portion of the base 2 and on the rear side of the score line guides 4a and 4b. This front tilt support F
Includes a tilting base 6 which is provided so as to rise upward from the upper surface of the base 2. A tilt bracket 8 is provided on the rear surface side of the tilt base 6 so as to be vertically tiltable via a tilt shaft 7. As shown in FIG. 1, the tilting position of the tilting bracket 8 with respect to the tilting base 6 is fixed by tightening a fixing nut (not shown) with a knob 8b onto a fixing bolt (not shown) provided on the tilting bracket 8. It As shown in FIG. 2, the tilting bracket 8 is provided on the tilting tip end side with two support edge portions 8a, 8a so as to project to the rear side in a state of being parallel to each other. Both support edges 8
A tilting arm portion 29 provided at the front end of the cutting machine body 3 is supported between a and 8a via a support shaft 9 so as to be vertically tiltable. The tilting shaft 7 is arranged so that its axis is orthogonal to the supporting shaft 9.

On the other hand, at the rear portion of the base 2, as shown in FIG. 1, a rear tilt support portion R is provided. The rear tilt support portion R is the tilt base 1 fixed to the upper surface of the base 2.
It has 0. The tilting base 10 has a support shaft 11
The guide bracket 12 is attached via the so as to be tiltable rightward in the cutting direction. The rear support shaft 11 is arranged coaxially with the front tilt shaft 7. As shown in FIG. 2, the guide bracket 12 is fixed to the blade case 20 by tightening a fixing nut 15 with respect to a fixing bolt 13 attached to the back side of the blade case 20. The fixing nut 15 can be tightened and loosened with respect to the fixing bolt 13 by rotating the lever 14 up and down. As shown in FIG. 1, the guide bracket 12 has a vertically elongated arc-shaped guide groove 12a.
Is provided. The guide bracket 12 is fixed to the back surface of the blade case 20 of the cutting machine body 3 via the guide groove 12a. The front tilt bracket 8 is supported so as to be vertically tiltable about the tilt shaft 7, and the rear guide bracket 12 is supported so as to be tilted to the left and right in the cutting direction about the support shaft 9. The main body 3 of the cutting machine can be tilted to the left and right with respect to the cutting direction, whereby the inclination angle of the cutting blade 22 with respect to the cutting material W can be changed to perform right-angle cutting or tilt cutting. Further, in a state where the fixing nut 15 is loosened, the cutting machine body 3 is tilted up and down about the support shaft 9 on the front side to change the protrusion amount of the cutting blade 22 from the lower surface of the base 2 to thereby cut the cutting blade 22. The so-called cutting depth of the cutting material W can be changed.

Next, the cutting machine main body 3 is provided with a blade case 20 for covering the cutting blade 22 and a motor case 21 having a drive motor built therein. The blade case 20 includes a gear case portion 20a and a cover member 20b arranged on the front side of the gear case portion 20a.
The motor case 21 is abutted against 0a, and the blade case 20 and the motor case 21 are joined by a fixing bolt 50c (see FIG. 3). The output of the drive motor built in the motor case 21 is decelerated by the gear train built in the gear case portion 20a and output as the rotation of the circular cutting blade 22. The tilting arm part 29 described above is provided below the gear case part 20a.
9 is formed so that it may protrude toward the front. The cutting blade 22 is located inside the blade case 20,
On the upper surface side of the base 2, the rear surface side is the gear case portion 20.
It is covered with a and the motor case 21, and the front side and the outer peripheral side are covered with the cover member 20b. The lower end of the cover member 20b faces the upper surface of the base 2 with a predetermined gap, as shown in FIG. As a result, an opening 20c is formed in the lower portion of the cover member 20b, and an operator can see the cutting edge of the cutting tip of the cutting blade 22 and the smear line through the opening 20c. The above-mentioned opening 20c corresponds to the visual recognition portion in the present invention.

Further, the cover member 20b is formed in an L-shaped cross section having an arcuate peripheral edge cover portion projecting toward the back surface on the outer peripheral portion. Then, as shown in FIG. 3, the cover member 20b has a peripheral edge cover portion abutted against an externally protruding base portion 20d integrally formed with the gear case portion 20a, and a screw hole of the base portion 20d. Fixing bolt 20 with knob 20e screwed into
It is fixed by f. Therefore, the fixing bolt 20f
By removing the cover member 20b, the cover member 20b can be removed from the gear case portion 20a. With the cover member 20b removed, the front side of the cutting blade 22 is exposed and the cutting blade 22
Replacement work is possible.

The lower half of the cutting blade 22 is covered with a safety cover 23 that can be opened and closed. The safety cover 23 rotates upward during the cutting operation, so that the range of the cutting blade 22 protruding toward the lower surface of the base 2 is exposed. Further, a dust suction cylinder portion 20g extending upward is integrally formed at a front end portion of the cover member 20b, and a cylindrical connection cylinder 20h is attached to an upper end portion of the cylinder portion 20g. There is. The cylindrical portion 20g and the connecting cylinder 20h form a suction port along the tangential direction of the cutting blade 22. And, at the time of cutting work, the connecting tube 2
A dust collector is connected to 0h via a hose 24, and the dust generated by the disconnection is collected by the dust collector.

The motor case 21 has a substantially C-shaped main handle 2 which extends obliquely rearward from the upper surface and reaches the rear surface.
5 (corresponding to the handle in the present invention), which is on the front side of the main handle 25,
The grip portion 26 is provided so as to project forward from the front surface of the. A main switch 27a, which is turned on and off by a trigger 27 for starting and stopping the drive motor, is arranged on the inner peripheral side of the main handle 25. Further, a power cord 28 is drawn into the rear portion of the main handle 25. Therefore, the operator can move the cutting machine 1 in the cutting direction while firmly holding the main handle 25 with one hand and the grip portion 26 with the other hand to firmly support the cutting machine 1 with both hands.

The illuminating device 5 includes a translucent resin case 51.
A substrate 53 in which an illuminator 52 for illuminating the cutting edge of the cutting blade 22 is mounted, and an illuminator 5 for illuminating the smear line guides 4a and 4b.
The board 55 on which the No. 4 is mounted, the lighting switch 56 for turning on and off both the lighting devices 52, 54, and the wiring (not shown) for connecting them to each other are housed and integrated. That is, the illumination device 5 is an assembly. In the present embodiment, light emitting diodes (LEDs) are used for the illuminators 52 and 54. The drive power of the cutting machine 1 obtained from the power cord 28 is diverted to the power source of the lighting device 5.

The case 51 of the lighting device 5 is shown by a thick line in each drawing. As illustrated, the case 51 is arranged between the motor case 21 and the blade case 20 to the front surface of the blade case 20. That is,
The case 51 is the gear case portion 20 of the blade case 20.
The upper part of the outer periphery of a and the main handle 25 of the motor case 21
A substantially L-shape (see FIG. 1) having a horizontal portion 51a extending substantially horizontally in the front-rear direction (cutting direction) and a vertical portion 51b vertically extending downward along the front surface of the cover member 20b.
Is formed in. Case 51 arranged in this way
Is fixed to the main handle 25 by mounting bolts 51c, as shown in FIG. That is, the lighting device 5 of the present embodiment is an external type to the main handle 25 of the motor case 21, and can be removed as needed. The case 51 described above corresponds to the extension member in the present invention.

At the rear end of the horizontal portion 51a of the case 51,
A lighting switch 56 is arranged, a lighting tool 52 for illuminating the cutting edge is arranged at the lower end of the vertical portion 51b, and a lighting tool 54 for guiding the smear lines is arranged on the upper side. That is, by arranging the lighting switch 56 near the trigger 27 of the main handle 25, the lighting switch 56 can be operated at hand,
The operability is improved. Further, as shown in FIGS. 1 and 3, the illuminator 52 for illuminating the cutting edge is attached to the front of the cutting edge of the cutting blade 22 and to the side of the front surface side of the cover member 20b in an inclined manner. By arranging
Light is radiated from above the opening 20c toward the cut portion from diagonally above. In order to cope with the irradiation from the obliquely upper side, in the present embodiment, a part of the lower end of the front surface of the cover member 20b of the blade case 20 is cut out, and a part of the illuminator 52 is inserted into the cutout 20j. However, the illumination by light is secured. In FIG. 1, the cleavage site is indicated by arrow C.

Further, the illuminating device 54 for the guide line illumination
As shown in FIG. 1, the lamps are mounted so as to be inclined so that the light is directed obliquely from above the head of the tilting base 6 toward the smear line guides 4a and 4b. In FIG.
Illumination directions of the illuminators 52 and 54 are indicated by white arrows. In addition, the illuminator 54 for the guide line illumination is
Compared to the illuminator 52 that illuminates the cut portion C, the object to illuminate is farther from the illuminator 52. In addition, the vertical lines (vertical surfaces) of the sumi-ray guides 4a and 4b are cut (inclined) at an angle corresponding to the mounting angle of the illuminator 54 so that the sumi-rays are not hidden by the shadow of the light of the illuminator 54. There is.

The cutting machine 1 of the embodiment configured as described above
According to the above, when the illumination switch 56 provided near the main handle 25 is turned on, the illuminators 52 and 54 arranged on the upper and lower portions of the front surface of the blade case 20 are turned on.
The light of the illuminator 52 is directed to the cut portion C, and the light of the illuminator 54 is directed to the smear line guides 4a and 4b. Therefore, the cutting site C and its periphery and the smear line guides 4a and 4b.
And its surroundings are illuminated at the same time. As a result, even when the cutting operation is performed in a dark place, for example, both the cutting site C and the sumi-ray guides 4a and 4b are illuminated brightly, so that the operator visually recognizes the position of the cutting edge with respect to the smi-lines at the cutting site C. The cutting work can be done easily and accurately while checking, and the sumi wire guide 4a (or 4b)
It is possible to make a right angle cut (or a 45 ° angle cut) while visually observing the position with respect to the smear line.

In this case, in the present embodiment, the illuminating tool 52 for illuminating the cutting edge is arranged in front of the cutting blade 22 and the cutting edge is irradiated through the opening 20c on the front side of the blade case 20. It is possible to provide a suitable lighting device 5 corresponding to a dust-proof cutting machine having no opening on the back surface side of the blade case 20. Further, according to the present embodiment, with the lighting device 5 still attached to the main handle 25, the cover member 20b of the blade case 20 is removed from the gear case portion 20a, and the cutting blade 2
2 can be exchanged. Therefore, the replacement work of the cutting blade 22 can be easily performed. Further, since the lighting device 5 has an assembly structure in which all the constituent elements including the lighting switch 56 are housed in the case 51, the wiring can be easily routed, and when it is necessary to remove the wiring from the cutting machine 1. However, the removal can be easily performed. Even if a configuration is adopted in which the blade case 20 is attached to the cover member 20b, the attachment / detachment is simplified because it is an assembly.

The present invention is not limited to the illustrated embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment described above, two sets of illuminators 52, one for the cutting edge and one for the Sumi-line guide,
Although the case where 54 is provided has been described, the configuration may be such that one lighting unit is provided and at least the cut portion C is illuminated. Further, two sets of illumination switches may be arranged so that the illuminating tools 52 and 54 for the cutting edge and the umi line guide can be turned on and off independently. Further, as the power source of the illumination device 5, the configuration in which the power source for driving the cutting machine is diverted is illustrated, but, for example, a dry battery or the like may be separately used as the power source. Further, although the illuminators 52 and 54 are configured by the light emitting diode (LED), they are not limited to the light emitting diode (LED) and may be changed to a normal miniature light bulb. Further, although the lighting device 5 is attached to the main handle 25 of the motor case 21,
The blade case 20 is not limited to this. Further, in the present embodiment, the opening 20c is formed over almost the entire cutting direction of the cover member 20b as a visible portion through which the operator can see the cutting edge of the cutting blade 22,
It suffices if there is at least a portion where the cutting edge of the tip in the cutting movement direction can be visually recognized. In short, it suffices that the operator can see it, and the part or the whole of the cover member 20b may be formed of the transparent resin. Further, in the present embodiment, the case of the dust-proof type cutting machine which is used by connecting with the dust collector and the hose has been described, but it may be applied to a type of cutting machine provided with a dust box for collecting dust, and is not always required. It is not limited to the dust collector type cutting machine.

[0024]

As described in detail above, according to the present invention,
It is possible to provide a cutting machine equipped with an illumination device suitable for a dust-proof cutting machine.

[Brief description of drawings]

FIG. 1 is a front view of a cutting machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the cutting machine.

FIG. 3 is a side view of the cutting machine similarly showing a part of the cutting machine.

[Explanation of symbols] C ... Cleavage site 1 ... Cutting machine 2 ... Base 3… Cutting machine body 4a ... Sumi wire guide (for right-angle cutting) 4b ... Sumi wire guide (for 45 ° inclined cutting) 5 ... Lighting device 52 ... Lighting equipment (for cutting edge) 54 ... Lighting equipment (for Sumi line guide) 20 ... Blade case 20a ... Gear case part 20b ... Cover member 21 ... Motor case 22 ... Cutting blade 25 ... Main handle

Claims (4)

[Claims] 1. A cutting machine comprising: a cutting blade; a blade case that covers the cutting blade; and a lighting device that illuminates a cutting edge of the cutting blade in a cutting movement direction through a visual recognition portion formed on the blade case. The cutting device is characterized in that the lighting device is configured to illuminate the cutting edge of the cutting blade from the front in the cutting movement direction. 2. The cutting machine according to claim 1, wherein the lighting device includes a lighting fixture, a lighting switch for turning on or off the lighting fixture, and the lighting fixture and the lighting switch are connected to each other. The cutting machine is characterized by being configured by an assembly that is integrated with the wiring. 3. The cutting machine according to claim 1, further comprising a base that supports the blade case, wherein the lighting device includes a lighting device that illuminates a smear line guide provided on the base. A cutting machine characterized by being provided. 4. The cutting machine according to claim 2, further comprising a handle gripped by an operator, wherein the assembly is attached to the handle, and the assembly is attached to the front side of the blade case. A cutting machine characterized in that the cutting machine is extended to and is integrated with an extension member extending further downward.