JP2011045995A - Cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting machine equipped with a suitable illuminating device as a dust-proof cutting machine. <P>SOLUTION: The cutting machine 1 is equipped with the illuminating device 5 for illuminating a blade edge of a cutting blade 22 positioned in a blade case 20 through an opening 20c formed at the blade case 20. The illuminating device 5 has a configuration to illuminate the blade edge by a light fixture 52 disposed at the lower part of the front surface of the blade case 20. Furthermore, the illuminating device 5 has the lighting fixture 54 for illuminating a marking line guide, and is integrated by storing two kinds lighting fixtures 52, 54 for the blade edge and the marking line guide and an illuminating switch 56 for switching the lighting fixtures on and off in a case 51 to constitute an assembly structure. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cutting machine used for cutting work such as a portable marnoco, particularly a masonry board and the like, and relates to a cutting machine provided with an illumination device that can illuminate a dark part brightly.

  Conventionally, this type of lighting device has been disclosed in, for example, Japanese Patent Application Laid-Open No. 11-170203. This conventional lighting device is the front part of the cutting machine main body and the side of the cutting part (the front end part of the cutting blade, where the cutting material is actually cut by the cutting edge, hereinafter the same), that is, An illuminating tool is arranged on a tilting support portion for attaching the cutting machine main body to the base so that the tilting adjustment is possible, and the cutting portion is illuminated from the back side (motor case side) by the illuminating tool. By brightly illuminating the cutting site with this illumination tool, the operator can efficiently and accurately perform the cutting operation while visually checking the position of the cutting edge of the cutting blade with respect to the smear line even in a dark place.

JP-A-11-170203

By the way, in a dustproof type cutting machine used for cutting masonry boards, etc., a cylindrical connection port is provided in the blade case covering the cutting blade, and a dust collector hose is connected to the connection port to remove dust generated by the cutting. It is forcibly sucked and collected in a dust collector. In such a dustproof cutting machine, the cutting blade is almost completely covered with the blade case in order to increase the dust collection efficiency.
However, in actual work, it is necessary to move while confirming the position of the cutting edge of the cutting blade with respect to the smear line. Therefore, on the front end side in the cutting movement direction of the cutting machine, the front side of the blade case (the opposite side of the motor case) ) Is provided with an opening so that the cutting edge and the smear line of the cutting blade can be seen through the opening.
For this reason, the illuminating device described in the publication that illuminates the cutting part from the back side of the blade case (motor case side) 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-described conventional problems, and an object of the present invention is to provide a cutting machine equipped with a lighting device suitable particularly for a dustproof cutting machine.

The above problems are solved by the following invention.
1st invention is a cutting machine provided with the cutting blade, the blade case which covers a cutting blade, and the illuminating device which illuminates the blade edge of the cutting movement direction of a cutting blade through the visual recognition part formed in the blade case, The apparatus is configured to illuminate the cutting edge of the cutting blade from the front in the cutting movement direction .
According to the first invention, 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 unit. In addition, the visual recognition part includes a transparent cover. As a result, the cutting edge of the cutting blade and its periphery 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 of the configuration that illuminates the cutting edge of the cutting blade from the front in the cutting movement direction, the dust-proof type that is restricted in terms of size, position, etc. due to dust-proofing regarding the visual recognition part formed on the blade case to see the cutting edge of the cutting blade It is effective when applied to a cutting machine.

In a second aspect based on the first aspect, the illuminating device integrates a lighting fixture, a lighting switch for turning on or off the lighting fixture, and a wiring for connecting the lighting fixture and the lighting switch to each other. It is a cutting machine characterized by comprising an assembly .
According to the second invention, the lighting device is configured by an assembly in which a lighting fixture, a lighting switch for turning on or off the lighting fixture, and a wiring interconnecting the lighting fixture and the lighting switch are integrated. ing. For this reason, 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 work is performed so that the attaching / detaching work can be easily performed. be able to.
A third invention is characterized in that, in the first or second invention, a base for supporting the blade case is provided, and the lighting device includes a lighting tool for illuminating a smear line guide provided on the base. Is a cutting machine .
According to the third aspect of the present invention, the lighting device includes a lighting tool that illuminates a smear line guide provided on a base that supports the blade case. When such a configuration is adopted, it is possible to perform the cutting operation while looking at not only the cutting edge of the cutting blade but also the Sumi line guide. That is, the operator can perform the cutting operation while appropriately checking the blade edge or the smear guide with the eyes according to the work situation.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the handle has a handle that is gripped by an operator, and the assembly is attached to the handle and extends from the handle to the front side of the blade case, and further downward. It is the cutting machine characterized by integrating through the extending member extended toward the direction .
According to the fourth aspect of the present invention, the handle is held by an operator, and the assembly is attached to the handle and extends from the handle to the front side of the blade case and further downward. It was set as the structure integrated through the existing extension member. Thereby, rational arrangement | positioning of a lighting switch and a lighting fixture is attained. That is, it is possible to improve the operability by arranging an illumination switch near the handle that the operator holds at the time of cutting work, and the illumination tool can be arranged near the cutting edge that is the illumination target. Further, since the assembly is attached to the handle, the cover member of the blade case can be removed for replacement of the cutting blade while the assembly is still attached to the handle.

It is a front view of the cutting machine concerning the embodiment of the present invention. It is a top view of a cutting machine similarly. It is a side view of the cutting machine which also shows a part broken away.

  Next, an embodiment of the present invention will be described with reference to FIGS. 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 with a part broken away. The cutting machine 1 according to the present embodiment is a dustproof marnoco machine used for cutting work such as a masonry board, and is supported so as to be tiltable left and right in the cutting direction with respect to the base 2 and the base 2. Cutting machine main body 3, cutting part (the front end part of the cutting blade 22, the part where the cutting material W is actually cut by the cutting edge, the same applies hereinafter), and a guide part for sumi line alignment (sumi line guide) 4a, 4b) is provided with a lighting device 5 for cutting work for illuminating brightly. In this specification, the cutting direction refers to the direction in which the cutting machine 1 moves in the cutting operation and the cutting proceeds. Accordingly, the right side in FIGS. 1 and 2 is the cutting direction.

Sumi wire guides 4a and 4b are provided at the front end (right end portion in the figure) of the base 2. In this example, two types are set: a smear line guide 4a for right angle cutting, and a smear line guide 4b for performing inclined 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 smear wire guide 4a (or 4b) with a smear wire (not shown) drawn in advance on the upper surface of the cutting material W. By doing so, the cutting edge can be moved along the smear line, whereby the cutting material W can be cut at a right angle (or inclined at 45 °) along the smear 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 the cutting blade 22 by 45 ° with respect to the cutting material W. The cutting blade 22 is tilted by tilting the cutting machine body 3 with respect to the base 2.

The cutting machine main 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 locations on the front portion and the rear portion of the base 2. A tilt support portion F on the front side is provided on the front side of the base 2 and on the rear side of the sumi guides 4a and 4b. This front tilt support portion F includes a tilt base 6 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 via a tilt shaft 7 so as to tilt up and down. As shown in FIG. 1, the tilting position of the tilting bracket 8 relative to the tilting base 6 is fixed by tightening a fixing nut (not shown) with a knob 8b on a fixing bolt (not shown) provided on the tilting bracket 8. The
As shown in FIG. 2, two support edge portions 8a and 8a are provided on the tilting tip side of the tilt bracket 8 so as to project rearward in a state of being parallel to each other. A tilting arm portion 29 provided at the front end portion of the cutting machine body 3 is supported between the support edge portions 8a and 8a via the support shaft 9 so as to be tiltable up and down. The tilting shaft 7 is arranged in a direction in which its axis is perpendicular to the support shaft 9.

On the other hand, as shown in FIG. 1, a rear tilt support portion R is provided at the rear portion of the base 2. The rear tilt support portion R includes a tilt base 10 fixed to the upper surface of the base 2. A guide bracket 12 is attached to the tilt base 10 via a support shaft 11 so as to be tiltable to the right 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 or 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 is provided with an arcuate guide groove 12 a that is long in the vertical direction. The guide bracket 12 is fixed to the back surface of the blade case 20 of the cutting machine body 3 through the guide groove 12a.
The front tilt bracket 8 is supported to be tiltable up and down about the tilt shaft 7, and the rear guide bracket 12 is supported to be tiltable in the cutting direction right and left about the support shaft 9. The cutting machine body 3 can be tilted to the left and right with respect to the cutting direction, whereby the angle of inclination of the cutting blade 22 with respect to the cutting material W can be changed to perform right-angle cutting or inclined cutting.
Further, in a state where the fixing nut 15 is loosened, the cutting machine main body 3 is tilted up and down around the front support shaft 9 to change the amount of protrusion of the cutting blade 22 from the lower surface of the base 2 to thereby change the cutting blade 22. The so-called depth of cut for the cutting material W can be changed.

Next, the cutting machine body 3 includes a blade case 20 that covers the cutting blade 22 and a motor case 21 that incorporates a drive motor. The blade case 20 includes a gear case portion 20a and a cover member 20b disposed on the front side of the gear case portion 20a. The motor case 21 is abutted against the gear case portion 20a so that the blade case 20 and the motor case 21 are fixed to the 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 outputted as the rotation of the circular cutting blade 22. The tilt arm portion 29 described above is provided below the gear case portion 20a, and the tilt arm portion 29 is formed so as to protrude forward.
The cutting blade 22 is located inside the blade case 20, and on the upper surface side of the base 2, the back surface side is covered with the gear case portion 20 a and the motor case 21, and the front surface side and the outer peripheral side are covered with the cover member 20 b. The lower end portion of the cover member 20b faces the upper surface of the base 2 with a predetermined interval as shown in FIG. Thereby, an opening 20c is formed in the lower part of the cover member 20b, and an operator can see the cutting edge and the smear line at the cutting tip of the cutting blade 22 through the opening 20c. Said opening part 20c respond | corresponds to the visual recognition part said by this invention.

  Moreover, the cover member 20b is formed in the L-shaped cross section provided with the circular-arc-shaped peripheral cover part which protrudes toward a back surface side in an outer peripheral part. Then, as shown in FIG. 3, the cover member 20b has a screw hole in the base portion 20d in a state where the peripheral cover portion is abutted against an outwardly projecting base portion 20d formed integrally with the gear case portion 20a. It is fixed by a fixing bolt 20f with a knob 20e to be screwed in. Therefore, by removing the fixing bolt 20f, 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 can be replaced. Has been.

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 is rotated upward during the cutting operation, thereby exposing a range protruding from the lower surface side of the base 2 of the cutting blade 22.
Further, a dust suction cylinder 20g extending upward is integrally formed at the front end of the cover member 20b, and a cylindrical connecting cylinder 20h is attached to the upper end of the cylinder 20g. Yes. A suction port along the tangential direction of the cutting blade 22 is formed by the cylindrical portion 20g and the connecting cylinder 20h. During the cutting operation, a dust collector is connected to the connecting cylinder 20h via the hose 24, and dust generated by the cutting is collected in the dust collector.

The motor case 21 has a substantially C-shaped main handle 25 (corresponding to the handle in the present invention) that protrudes obliquely rearward from the upper surface to the rear surface, and is located on the front side of the main handle 25, and the motor case The grip part 26 provided so that it may protrude ahead from the front surface of 21 is provided. A main switch 27 a that is turned on and off by a trigger 27 for starting and stopping the drive motor is disposed on the inner peripheral side of the main handle 25. A power cord 28 is drawn into the rear part of the main handle 25.
Therefore, the operator can hold the main handle 25 with one hand, hold the grip portion 26 with the other hand, and move the cutting machine 1 in the cutting direction while firmly supporting with both hands.

  The illuminating device 5 includes a translucent resin case 51, a substrate 53 on which an illuminator 52 that illuminates the cutting edge of the cutting blade 22, and a substrate 55 on which an illuminator 54 that illuminates the smear guides 4a and 4b is mounted. In addition, the lighting switch 56 for turning on and off the two lighting devices 52 and 54 and the wiring (not shown) for interconnecting them are housed and integrated. That is, the lighting device 5 is assembled. In the present embodiment, light emitting diodes (LEDs) are used for the lighting fixtures 52 and 54. The driving power of the cutting machine 1 obtained by the power cord 28 is diverted to the power source of the lighting device 5.

The case 51 of the illuminating device 5 is indicated by a thick line in each figure. As illustrated, the case 51 is disposed from 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 formed on the front surface of the cover member 20b and a horizontal portion 51a extending substantially horizontally in the front-rear direction (cutting direction) between the upper outer periphery of the gear case portion 20a of the blade case 20 and the main handle 25 of the motor case 21. It is formed in a substantially L shape (see FIG. 1) having a vertical portion 51b extending vertically downward along the vertical direction.
As shown in FIG. 3, the case 51 arranged in this manner is fixed to the main handle 25 with mounting bolts 51 c. That is, the illuminating device 5 of this embodiment is an external type with respect to the main handle 25 of the motor case 21, and can be removed as needed. Said case 51 respond | corresponds to the extending member said by this invention.

A lighting switch 56 is disposed at the rear end of the horizontal portion 51a of the case 51, a lighting tool 52 for cutting edge lighting is provided at the lower end of the vertical portion 51b, and a lighting tool 54 for smear line guide lighting is provided above. Is arranged. That is, the illumination switch 56 is arranged near the trigger 27 of the main handle 25, thereby enabling operation at hand and improving operability.
Further, as shown in FIGS. 1 and 3, the illumination tool 52 for cutting edge illumination is attached to the front of the cutting edge of the cutting blade 22 and to the side of the front side of the cover member 20b. With this arrangement, light is emitted obliquely from above toward the cutting site from the opening 20c. In order to cope with this oblique irradiation from above, in the present embodiment, the front lower end portion of the cover member 20b of the blade case 20 is partially cut out, and the illumination tool 52 is partially inserted into the cutout portion 20j. In addition, the lighting performance by light is ensured. In FIG. 1, the cleavage site is indicated by arrow C.

  Further, as shown in FIG. 1, the illumination tool 54 for the Sumi line guide illumination is attached so as to be inclined so that the light is irradiated from the oblique upper side over the head of the tilt base 6 toward the Sumi line guides 4a and 4b. It has been. In FIG. 1, the illumination direction by the illumination tools 52 and 54 is indicated by white arrows. In addition, since the illumination tool 54 for the Sumi line guide illumination is far away from the illumination tool 52 that illuminates the cut portion C, two illumination tools 54 are arranged in parallel. In addition, the vertical line (vertical surface) of the smear line guides 4a and 4b is cut (inclined) to an angle corresponding to the mounting angle of the lighting tool 54 so that the smear line is not hidden by the shadow of the light of the lighting tool 54. Yes.

  According to the cutting machine 1 of the embodiment configured as described above, when the lighting switch 56 provided near the main handle 25 is turned on, the lighting fixtures 52 and 54 arranged on the upper and lower portions of the front surface of the blade case 20 are turned on. To do. The light from the illuminator 52 is directed to the cutting site C, and the light from the illuminator 54 is directed to the smear line guides 4a and 4b. For this reason, the cutting | disconnection site | part C and its periphery and the sumi guides 4a and 4b and its periphery are illuminated simultaneously. Thereby, even when cutting work is performed in a dark place, for example, both the cutting part C and the smear line guides 4a and 4b are brightly illuminated, so the operator can visually recognize the position of the cutting edge in the cutting part C with respect to the smear line. The cutting operation can be performed easily and accurately while checking, and the right angle cutting (or inclined cutting at 45 °) can be performed while visually checking the position of the smear line guide 4a (or 4b) with respect to the smear line. .

In this case, in the present embodiment, the blade case 20 is configured such that the cutting tool 22 is disposed in front of the cutting blade 22 and the blade tip 20 is irradiated through the opening 20 c on the front side of the blade case 20. The suitable illuminating device 5 corresponding to the dustproof cutting machine which does not have an opening part in a back surface side can be provided.
Moreover, according to this Embodiment, the cutting blade 22 can be replaced | exchanged by removing the cover member 20b of the blade case 20 from the gear case part 20a in the state which attached the illuminating device 5 to the main handle 25. FIG. For this reason, the exchange work of the cutting blade 22 can be performed easily. In addition, since the lighting device 5 is an assembly structure in which all the components including the lighting switch 56 are housed in the case 51, the wiring device can be easily routed and it is necessary to remove it from the cutting machine 1. Even so, it can be easily removed. Even if the configuration of attaching to the cover member 20b of the blade case 20 is adopted, the attachment / detachment is simplified because it is assembled.

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 above-described embodiment, a case has been described in which two sets of lighting tools 52 and 54 for the blade edge and for the smear line guide are provided. However, the lighting tool is changed to a configuration that illuminates at least the cutting portion C with one set. May be. Moreover, it is good also as a structure which can arrange | position 2 sets of illumination switches and can turn on and off the lighting fixtures 52 and 54 for a blade edge | tip and a Sumi wire guide independently.
Moreover, although the structure which diverts the power supply for the said cutting machine drive was illustrated as a power supply of the illuminating device 5, it is good also considering a dry cell etc. as a power supply separately, for example. Moreover, although the illumination tools 52 and 54 were comprised by the light emitting diode (LED), you may change into not only a light emitting diode (LED) but a normal miniature light bulb.
The lighting device 5 is attached to the main handle 25 of the motor case 21, but is not limited thereto, and may be the blade case 20. Further, in the present embodiment, the opening 20c is formed over almost the entire cutting direction of the cover member 20b as a visual recognition part that allows the operator to see the cutting edge of the cutting blade 22, but at least the cutting movement direction. It suffices if there is a part where the tip of the tip can be visually recognized. In short, it suffices if the operator can see it visually, and the part or the whole of the cover member 20b may be formed of a transparent resin.
Further, in the present embodiment, the dust-proof cutting machine connected to the dust collector with a hose has been described. However, the present invention may be applied to a type of cutting machine provided with a dust collection dust box, and is not always required. It is not limited to a dust collection type cutting machine.
As described above in detail, according to the present invention, it is possible to provide a cutting machine equipped with a lighting device suitable for a dustproof cutting machine.

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

Claims (4)

A cutting machine comprising a cutting blade, a blade case covering the cutting blade, and an illumination device that illuminates the cutting edge in the cutting movement direction of the cutting blade through a visual recognition portion formed on the blade case,
A cutting machine characterized in that the illumination device illuminates the cutting edge of the cutting blade from the front in the cutting movement direction. The cutting machine according to claim 1,
The lighting device is configured by an assembly in which a lighting tool, a lighting switch for turning on or off the lighting tool, and a wiring interconnecting the lighting tool and the lighting switch are integrated. Cutting machine to do. The cutting machine according to claim 1 or 2,
A cutting machine comprising: a base that supports the blade case; and the lighting device includes a lighting tool that illuminates a smear guide provided on the base. The cutting machine according to claim 2,
The assembly has a handle that is gripped by an operator, and the assembly includes an extension member that extends from the handle to the front side of the blade case and further extends downward while being attached to the handle. A cutting machine characterized in that it is integrated with each other.

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