JP2010064179A - Cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the flexibility of a lighting tool layout while ensuring the visibility of a cut part, in a cutter equipped with a lighting system lighting the cut part, such as a dust-proof circular saw covering the periphery of the cut part with a dust-proof cover, wherein the lighting tool is conventionally disposed just beside the cut part so as to prevent diffused reflection due to the dust-proof cover and its irradiating direction is made horizontal, and which has such a problem that the flexibility in the layout of the lighting tool is poor. <P>SOLUTION: In the cutter, a light permeating portion 35 through which the light of the lighting tool 32 permeates is made to be orthogonal to an irradiating direction (an optical axis J) of the lighting tool 32, thereby preventing diffused reflection. Therefore, the flexibility of the lighting tool layout can be improved. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention mainly relates to a portable cutting machine called a so-called dustproof marnoco.

A so-called dustproof marnoco has a base mounted on a cutting material and a main body of a cutting machine supported on the upper surface of the base. The main body of the cutting machine has a circular cutting blade that is rotated by a drive motor. I have. The lower part of the cutting blade is protruded to the lower surface side of the base, and this protruding part is cut into the cutting material for cutting. At the cutting edge cut into the cutting material, cutting powder is blown upward. For this reason, the dustproof marnoco is provided with a special configuration in which the cutting part is covered with a blade case or a dustproof cover to prevent scattering of cutting powder. The blade case covering the periphery of the cutting site is usually transparent to ensure its visibility.
On the other hand, this type of cutting machine is provided with a lighting device to facilitate work in a darker place than before. This illuminating device mainly includes an illuminating tool that brightly illuminates a cut site, and various techniques relating to this type of illuminating device are disclosed in the following patent documents. In Patent Document 1, a lighting tool is disposed right next to a cutting site and irradiated with light horizontally, thereby irradiating light at a right angle to the light transmitting portion of the blade case positioned between the cutting site. Thus, a technique is described in which irregular reflection of light is reduced to improve the visibility of a cut portion.
Japanese Patent No. 4097245 JP 2003-48118 A JP 2003-48202 A

However, according to the above-mentioned conventional lighting device, it is necessary to arrange the lighting device right next to the cutting portion and make the light irradiation direction horizontal, so that the degree of freedom is low with respect to the mounting portion and the irradiation direction of the lighting device. There was a problem. In addition, since the illumination switch of the normal illumination device is disposed at the handle part away from the cutting site, there is a problem that the wiring distance to the illumination tool becomes long and the handling becomes troublesome.
On the other hand, for example, when the blade case is provided with a through hole and the light of the illuminating device is irradiated toward the cut site through the through hole, the illuminator is applied to a site other than the vicinity of the cut site. Although the problem of irregular reflection in the blade case can be avoided even if it is arranged, in this case, the dust collection performance of the blade case is impaired.
Therefore, the present invention increases the degree of freedom with respect to the location of the illuminator and the irradiation direction, while maintaining the visibility of the cut site (preventing irregular reflection) without impairing the dust collection performance of the blade case. The purpose of this is to shorten the wiring distance to the lighting switch and simplify the handling.

For this reason, this invention was set as the cutting machine of the structure described in each claim of a claim.
According to the cutting machine of the first aspect, the illuminating device is disposed outside the blade case, and the light emitted from the illuminating device is transmitted through the light transmitting portion of the blade case and irradiated to the cutting site. . The light transmission part is provided in a state orthogonal to the light irradiation direction. For this reason, since light is incident on the light transmitting portion at a right angle, the irregular reflection of light is significantly suppressed or substantially not generated at the light transmitting portion (blade case), and the cut site is irradiated. As described above, since the light transmission part of the blade case is configured to be orthogonal to the irradiation direction to prevent irregular reflection of light, it is possible to arrange the illumination tool directly next to the cutting site as in the prior art, and The visibility of the cutting site by the lighting tool can be ensured without providing a through hole in the blade case. As a result, the illuminator can be arranged in an empty space closer to the illumination switch of the handle part, not just near the cutting part, and the degree of freedom with respect to the arrangement part of the illuminator and its irradiation direction is increased. be able to.
In addition, as a result of increasing the degree of freedom with respect to the location of the illuminator, the wiring distance between them can be shortened by arranging the illuminator closer to the illumination switch of the illuminator, thereby simplifying the routing of the wiring. Can be planned.
According to the cutting machine of the second aspect, the sumi line guide is brightly illuminated in addition to the cutting site, so that the working efficiency in a dark place can be further enhanced.
According to the cutting machine of Claim 3, since the 1st and 2nd lighting fixture can be handled as one assembly, while installing and removing the said lighting fixture can be simplified, the presence or absence of the said lighting device Product variations can be easily set.

Next, an embodiment of the present invention will be described with reference to FIGS. 1-3 has shown the whole cutting machine 1 which concerns on this embodiment. In the present embodiment, as an example of the cutting machine 1, a portable cutting machine referred to as a so-called dustproof marnoco is illustrated. In FIG. 1, the user is located on the left side of the cutting machine 1. The user advances the cutting process by moving the cutting machine 1 to the right side in FIG. Therefore, in the following description, the direction in which the cutting process proceeds in the front-rear direction of the member or the like is the front side (the front side in the cutting progress direction). Moreover, it uses on the basis of a user about the left-right direction of a member.
The cutting machine 1 includes a base 2 placed on a cutting material W and a cutting machine body 10 supported on the upper surface side of the base 2. The base 2 has a rectangular flat plate shape, and a window portion 2a for inserting the cutting blade 11 is provided in the middle and slightly to the right. A sum line guide 2b is provided in front of the window 2a and at the front end of the base 2.
The cutting machine main body 10 includes a circular cutting blade 11, a blade case 12 covering the periphery of the cutting blade 11, and a drive motor 13 attached to the back side (left side) of the blade case 12. The front and rear of the blade case 12 are supported on the upper surface of the base 2 via the brackets 16 and 17, whereby the cutting machine body 10 is supported on the upper surface of the base 2.
The output of the drive motor 13 attached to the back side of the blade case 12 is transmitted to the spindle 14 protruding inside the blade case 12. A cutting blade 11 is attached to the tip of the spindle 14.
A loop-shaped handle portion 18 is provided on the top of the drive motor 13. A trigger-type switch lever 18 a is disposed on the inner peripheral side of the handle portion 18. When the switch lever 18a is pulled with a fingertip, the drive motor 13 is activated and the cutting blade 11 rotates. A lighting switch 31 is disposed on the side of the handle portion 18. When the illumination switch 31 is turned on, the cutting site C is brightly illuminated by the illumination device 30 described later.
A power cord 19 is connected to the rear portion of the handle portion 18 (front side as viewed from the user). The power cord 19 supplies power to the power circuit of the drive motor 13.

The blade case 12 has a halved structure that bisects along the cutting blade 11 into a dustproof cover 20 on the front side (right side) and a main body side case 21 on the back side (left side). FIG. 2 shows the dustproof cover 20 on the front side removed from the main body side case 21. The removed dustproof cover 20 is shown alone in FIG.
The dust cover 20 is manufactured by integral molding of a transparent (or semi-transparent) resin to ensure the visibility of the cut portion C, and includes a semi-circular cover portion 20c along the periphery of the cutting blade 11 and the front thereof. A dust collecting cylinder portion 20a provided integrally with the portion is provided. The dust collection cylinder portion 20a has a substantially cylindrical shape extending upward from the periphery of the cutting site C. A semicircular halved portion 20b is formed on the upper part of the dust collecting cylinder portion 20a. On the other hand, the front portion of the main body side case 21 is provided with a half portion 21a that makes a pair with the half portion 20b.
The cover case 20c of the dustproof cover 20 is connected to the main body side case 21 so as to face each other, whereby the blade case 12 in which the periphery (the cutting edge) of the cutting blade 11 is accommodated is formed. Further, the half-split portion 20b on the dust-proof cover 20 side and the half-split portion 21a of the main body side case 21 are abutted to form a cylindrical discharge port 22. A dust collection duct 23 is connected to the discharge port 22. A dust collection bag (not shown) is attached to the upper portion of the dust collection cylinder portion 20a through the dust collection duct 23.
As shown in FIG. 1, an arrow indicating the rotation direction of the cutting blade 11 is displayed on the side surface of the dust cover 20. When the cutting blade 11 rotates counterclockwise as indicated by this arrow, the cutting powder is blown upward from the cutting portion C. In this specification, the part where the cutting edge of the cutting blade 11 is cut into the cutting material W, and the crossing part of the lower surface of the base 2 and the cutting edge of the cutting blade 11 in a side view is defined as a cutting part C.
The lower part of the cutting blade 11 is projected to the lower surface side through the window part 2a of the base 2. This protruding portion is cut into the cutting material W to be cut. This protruding portion is covered with a movable cover 15 that can be opened and closed. As shown in FIG. 1, the movable cover 15 is brought into contact with the end portion of the cutting material W, and the user moves the cutting machine 1 forward in the cutting progress direction in this contact state. It is pushed relatively and turns in the opening direction. When the movable cover 15 is opened, the cutting edge of the cutting blade 11 is exposed, and this exposed portion is cut into the cutting material W. The part to be cut is a cutting part C, and the cutting powder is blown up from the cutting part C into the dust collecting cylinder part 20a of the dust-proof cover 20 above the base 2.

The cutting site C is illuminated brightly by the lighting device 30. The lighting device 30 is provided in the cutting machine body 10. The lighting device 30 includes first and second lighting tools 32 and 33. In the present embodiment, LEDs (light emitting diodes) are used for the first illumination tool 32 and the second illumination tool 33, respectively. The two illuminators 32 and 33 are assembled in one illumination case 34. The lighting case 34 is disposed on the back side of the blade case 12 and in a vacant space slightly diagonally above and to the left of the cut portion C. The lighting case 34 is fixed to the back side of the blade case 12 (main body side case 21) by fixing screws 34a and 34a so as to be detachable.
The cutting part C is brightly illuminated by the first lighting tool 32. The second illumination tool 33 illuminates the smear line guide 2b brightly. The first and second lighting fixtures 32 and 33 are turned on by turning on the lighting switch 31 disposed on the handle portion 18.
As shown in FIG. 4, the first lighting device 32 is not diagonally adjacent to the cutting site C as in the prior art, but is disposed obliquely above the cutting site C. The light emitted from the first illuminating device 32 disposed outside the blade case 12 is transmitted through the back side of the blade case 12 and is applied to the cutting site C. Therefore, the irradiation direction (optical axis J) of the first illumination tool 32 is not horizontal (perpendicular to the back surface of the blade case 12) as in the prior art, but is inclined from obliquely upward to downward.
A light transmitting portion 35 is provided on a portion of the back surface of the blade case 12 where light from the first illumination tool 32 is transmitted. As shown in FIG. 5, the light transmission part 35 is provided integrally with the dust collecting cylinder part 20 a of the dustproof cover 20. The light transmission part 35 is made of a transparent resin plate. The light transmission part 35 is positioned at a right angle to the irradiation direction (optical axis J) of the light irradiated from the first lighting tool 32 toward the cutting site C. For this reason, this light transmission part 35 is provided in the state which inclined rather than parallel with respect to the back surface of the cutting blade 11 and the blade case 12.
Thus, since the light transmission part 35 is provided in a state orthogonal to the irradiation direction of the first illumination tool 32, the irradiated light is incident on the light transmission part 35 at a right angle. The cutting site C is efficiently irradiated with almost no reflection or irregular reflection. Therefore, the irradiated light is not reflected by the base 2 or the dust collecting cylinder portion 20a of the dustproof cover 20, and the cut portion C is not easily seen, and the high visibility can be ensured.

According to the cutting machine 1 of this embodiment demonstrated above, since the cutting | disconnection site | part C is illuminated by the 1st lighting tool 32 of the illuminating device 30, and the Sumi line guide 2b is illuminated by the 2nd lighting tool 33, it is dark. Cutting work at the place can be performed efficiently. The 1st lighting fixture 32 is arrange | positioned not in the vicinity of the cutting | disconnection site | part C but the diagonally upward empty space conventionally.
Even if the light of the first illumination tool 32 is transmitted through the blade case 12 and is irradiated obliquely from above the cutting site C, the light transmitting portion 35 of the blade case 12 is irradiated in the irradiation direction (optical axis J). Therefore, light is incident on the light transmission part 35 at a right angle. As a result, the light of the first illumination tool 32 is efficiently applied to the cutting part C without causing almost any light reflection or irregular reflection in the light transmitting part 35, thereby ensuring high visibility of the cutting part C. be able to.
Moreover, since the 1st lighting fixture 32 is diagonally above the cutting | disconnection site | part C and is arrange | positioned in the site | part close | similar to the lighting switch 31 of the handle | steering-wheel part 18, between the said 1st lighting fixture 32 and the lighting switch 31 The wiring distance between them can be shortened, whereby the wiring can be simplified.
Further, since the second illumination tool 33 for brightly illuminating the smear line guide 2b is provided in addition to the first illumination tool 32, it is possible to efficiently perform a cutting operation in a dark place. Since the first and second lighting fixtures 32 and 33 are assembled into one lighting case 34, it can be easily attached to and detached from the cutting machine body 10, and other parts such as the blade case 12. It becomes easy to set the product variation about the presence or absence of the illuminating device 30 while aiming at common parts.
In addition, the through hole of the blade case 12 is provided, and the cutting portion C is irradiated through the through hole to prevent irregular reflection at the blade case 12, but the resin plate that prevents the scattering of the cutting powder is light-transmitted. Since it is the structure used as the part 35, the dust collection performance of the said blade case 12 is not impaired.

Various modifications can be made to the embodiment described above. For example, the second lighting tool 33 may be omitted. Moreover, although the structure which incorporates the 1st lighting fixture 32 and the 2nd lighting fixture 33 in the one lighting case 34 was illustrated, it is good also as a structure attached to each separately.
The configuration in which the first lighting device 32 is disposed on the back side of the blade case 12 and slightly obliquely on the left side with respect to the cutting part C is illustrated. However, the front side of the blade case 12 (right diagonally as viewed from the user) It is good also as a structure arrange | positioned in upper direction. In this case, a similar effect can be obtained by providing a light transmitting portion on the front side of the blade case 12 in a direction orthogonal to the irradiation direction (optical axis J).
In addition, even when the illuminating device is disposed obliquely above the front side of the cutting part C and the cutting part C is illuminated from the front side in the cutting progress direction, irregular reflection is prevented by making the light transmission part of the blade case orthogonal to the irradiation direction. And the visibility of the said cutting | disconnection site | part C can be improved.
Furthermore, although the structure which uses LED (light emitting diode) as the 1st lighting tool 32 and the 2nd lighting tool 33 was illustrated, it is good also as a structure which uses a light bulb.
Moreover, it is applicable not only to the dust-proof marine saw illustrated but also to other types of cutting machines, and other parts such as a blade case positioned between the illuminator and the cutting part, which transmits the irradiated light. By making the transmission part orthogonal to the irradiation direction, the irregular reflection can be prevented and the visibility of the cut portion C can be improved.
Furthermore, although the light transmission part 35 was orthogonally crossed with respect to the irradiation direction (optical axis J) of the 1st lighting fixture 32, and this showed the structure which makes the incident angle of the light with respect to the said light transmission part 35 a right angle, In the specification, the term “orthogonal” or “right angle” is used to mean an angle having a certain width centered on 90 ° in addition to precisely 90 °. Therefore, in addition to the configuration in which the irradiation direction of the first illumination tool 32 is accurately set to 90 ° with respect to the light transmission portion 35, the irradiation direction may be set in the range of, for example, about 80 ° to 100 °. In short, the reflection or irregular reflection is reduced by appropriately setting the angle of the part (light transmission part) through which light passes, such as the blade case, in accordance with the irradiation direction of the first illuminating device arranged in an arbitrary part. The present invention has a great significance in that the degree of freedom with respect to the arrangement part of the lighting device can be increased while ensuring high visibility of the cutting part.

1 is an overall front view of a cutting machine according to an embodiment of the present invention. 1 is an overall perspective view of a cutting machine according to an embodiment of the present invention. This figure has shown the state which looked at the cutting machine from the arrow (II) direction in FIG. It is the whole top view which looked at the cutting machine which concerns on embodiment of this invention from the arrow (III) direction in FIG. It is the figure which looked at the cutting machine concerning this embodiment from the cutting progress direction front side. In this figure, the blade case is shown in the section of (IV)-(IV) in FIG. It is a perspective view of a dust cover alone. This figure has shown the state which looked at the dustproof cover inside.

Explanation of symbols

W ... Cutting material C ... Cutting part J ... Optical axis 1 ... Cutting machine 2 ... Base, 2a ... Window part, 2b ... Sumi wire guide 10 ... Cutting machine body 11 ... Cutting blade 12 ... Blade case 13 ... Drive motor 14 ... Spindle DESCRIPTION OF SYMBOLS 16, 17 ... Bracket 18 ... Handle part, 18a ... Switch lever 19 ... Power cord 20 ... Dust-proof cover, 20a ... Dust collection cylinder part, 20b ... Half split part, 20c ... Cover part 21 ... Main body side case, 21a ... Half split Unit 30 ... Lighting device 31 ... Lighting switch 32 ... First lighting fixture 33 ... Second lighting fixture 34 ... Lighting case 34a ... Fixed screw 35 ... Light transmission portion

Claims (3)

A cutting machine comprising a base placed on a cutting material, and a cutting machine body supported on the upper surface of the base and protruding the lower part of the cutting blade on the lower surface side of the base,
The cutting machine body is disposed on the outer side of the blade case that covers the periphery of the cutting blade, and illuminates the cutting portion of the cutting blade with respect to the cutting material by irradiating light obliquely from above. With lighting equipment,
A cutting machine in which the light transmission part of the blade case is orthogonal to the irradiation direction of the light. 2. The cutting machine according to claim 1, wherein the illumination device irradiates light to a smear line guide portion provided at a tip of the base in addition to the first illumination tool that irradiates light to the cutting portion. Cutting machine equipped with lighting equipment. 3. The cutting machine according to claim 2, wherein the first and second lighting devices are assembled and attached to the main body of the cutting machine.

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