JP7151619B2 - Cutting machine - Google Patents

Description

The present invention relates to a cutting machine.

2. Description of the Related Art Conventionally, cutting tools have been widely used for cutting workpieces such as wood. As such a cutting tool, for example, a tabletop circular saw described in Patent Document 1 is known. The tabletop circular saw described in Patent Document 1 includes a cutting section to which a cutting blade can be attached, a base section having a mounting surface on which a workpiece can be mounted, and a cutting section that is positioned close to and apart from the mounting surface. and a cutting part supporting part that supports the cutting part so as to be able to swing. Further, the cutting section is provided with an illumination section capable of irradiating light toward the placement surface.

In the cutting operation using the tabletop circular saw, the operator places the workpiece on the mounting surface, and swings the workpiece so that the cutting portion approaches the mounting surface, thereby cutting the workpiece. disconnect.

JP 2016-209939 A

In the tabletop circular saw described above, since the lighting section is provided in the cutting section, when the cutting section is swung, the lighting section also swings integrally with the cutting section, and the mounting surface (base section) of the lighting section The position with respect to is also changed. Therefore, due to the swinging motion of the cutting part, the illuminated area (the area of the placing surface and the surface of the workpiece placed on the placing surface which is illuminated by the light emitted from the illumination part) is There has been a problem that it changes and the workability is lowered. For example, when the cutting part is swung so as to approach the mounting surface in order to cut the workpiece, the illumination part also approaches the mounting surface and the area to be illuminated is reduced. , the visibility of the work material is lowered, and the workability is lowered.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cutting machine capable of improving workability by suppressing changes in the illuminated area caused by swinging of the cutting portion.

In order to solve the above-mentioned problems, the present invention provides a cutting portion to which a cutting blade can be attached, a base portion having a mounting surface on which a workpiece can be placed, and a swing shaft extending through the cutting portion in a first direction. a cutting part supporting part that swingably supports the cutting part so as to approach and separate from the mounting surface centering on the center; and a portion, wherein the illumination portion is located on the opposite side of the base portion with respect to the swing axis in a second direction orthogonal to the mounting surface. .

According to the above configuration, when the cutting section swings about the swing axis with respect to the mounting surface, it is possible to suppress a change in the irradiation range of the light from the irradiation section, thereby improving workability. can be done. In addition, since the illumination section is positioned on the opposite side of the base section with respect to the swing axis, the irradiation range of the light from the illumination section can be widened compared to the case where the illumination section is provided on the base section side with respect to the swing axis. workability can be further improved.

In the above configuration, it is preferable that the cutting part supporting part has a first supporting part that supports the cutting part movably in a third direction that intersects with the first direction with respect to the mounting surface.

The said structure WHEREIN: It is preferable that the said illumination part is provided in the said 1st support part.

According to the above configuration, when the cutting section swings about the swing axis with respect to the mounting surface, it is possible to suppress a change in the irradiation range of the light from the irradiation section, thereby improving workability. can be done.

In the above configuration, the first supporting portion includes at least two shaft members extending in the third direction and supporting the cutting portion so as to be movable in the third direction with respect to the mounting surface; and a connecting portion for connecting the shaft member of the book, and the illumination portion is preferably provided in the connecting portion.

According to the above configuration, the cutting portion can be stably supported as compared with the case where only one shaft member is used.

In the above configuration, the cutting section support section further includes a second support section that is slidable in the third direction with respect to the first support section, and the second support section includes the cutting section. is swingably supported so as to approach and separate from the mounting surface about the swing axis, and the cutting section has the second support section slidable with respect to the first support section. It is preferable that the illumination unit is provided on the second support unit so as to move in the third direction with respect to the mounting surface.

According to the above configuration, it is possible to suppress the change of the illuminated area due to the swinging of the cutting section, so that the workability can be improved.

In the above configuration, it is preferable to further include a wiring connected to the lighting section for supplying power to the lighting section, and a wiring support section provided on the first support section and supporting the wiring.

In the above configuration, a motor for rotationally driving the cutting blade attached to the cutting section, a first power connection section connectable to a power source of the motor, and the lighting section different from the power source of the motor. and a second power connection connectable to a power source of the.

According to the above configuration, even when the power source for the motor is unavailable (for example, when the tabletop circular saw is transported while the power cord of the tabletop circular saw is not connected to an AC power supply), If the power source of the lighting section is connected, light can be emitted from the lighting section, and workability can be improved.

ADVANTAGE OF THE INVENTION According to this invention, the cutting machine which can suppress the change of the illuminated area|region resulting from the rocking|fluctuation of a cutting part, and can improve workability can be provided.

1 is a left side view showing the appearance of a tabletop circular saw according to a first embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing the appearance of a tabletop circular saw according to a first embodiment of the present invention; 1 is a block diagram showing an electrical configuration of a tabletop circular saw according to a first embodiment of the present invention; FIG. 1 is a front view showing the external appearance of a tabletop circular saw according to a first embodiment of the present invention, showing a state in which a holder is tilted; FIG. Fig. 2 is a left side view showing the external appearance of the tabletop circular saw according to the first embodiment of the present invention, showing a state in which the cutting portion is swung so as to approach the base portion; Fig. 2 is a left side view showing the external appearance of the tabletop circular saw according to the first embodiment of the present invention, showing a state in which the cutting portion has moved forward with respect to the mounting surface; FIG. 11 is a left side view showing the appearance of a tabletop circular saw according to a second embodiment of the present invention; FIG. 10 is a front view showing the appearance of a tabletop circular saw according to a second embodiment of the present invention; FIG. 11 is a left side view showing the appearance of a tabletop circular saw according to a third embodiment of the present invention; FIG. 11 is a front view showing the appearance of a tabletop circular saw according to a third embodiment of the present invention;

A cutting machine according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10. FIG. First, a tabletop circular saw 1, which is an example of a cutting machine according to a first embodiment of the present invention, will be described with reference to FIGS. 1 to 6. FIG.

A desktop circular saw 1 is an electric cutting machine for cutting wood or the like (work material), and as shown in FIGS. a holder 3; a cutting portion support portion 4; an illumination portion 5; a wiring support portion 6; Although the details will be described later, the holder 3, the cutting part support part 4, the lighting part 5, the wiring support part 6, and the cutting part 7 are configured to be tiltable in the horizontal direction integrally with respect to the mounting surface 2A. The cutting portion 7 is supported by the cutting portion supporting portion 4 so as to be swingable toward and away from the mounting surface 2A (base portion 2) and movable in the front-rear direction with respect to the mounting surface 2A. It is

In the following description, "up" shown in FIG. 1 is defined as upward, "down" as downward, "front" as forward, and "back" as rearward. Further, in FIG. 1, the direction from the back of the paper to the front of the paper is defined as the left direction, and the direction from the front of the paper to the back of the paper is defined as the right direction. In the following description, the state in which the cutting portion 7 is neither tilted nor oscillated with respect to the placement surface 2A will be described, unless otherwise specified.

As shown in FIGS. 1 and 2, the base portion 2 includes a base 21, a turntable 22, a fence portion 23, an operating portion 24, a tilting shaft 25, and a tilting position adjusting mechanism 26. have.

The base 21 is a metal part that is grounded on the floor or the like, and has a central circular portion 21A, a left leg portion 21B, and a right leg portion 21C.

The central circular portion 21A is a portion forming the central portion of the base 21 in the left-right direction, and is positioned below the turntable 22, as shown in FIG. The central circular portion 21A has a substantially circular shape in a plan view, and a rotating shaft (not shown) extending vertically is provided at substantially the center of the central circular portion 21A in a plan view.

The left leg portion 21B and the right leg portion 21C are connected to the left and right portions of the central circular portion 21A, respectively. The vertical dimension of the left leg portion 21B and the right leg portion 21C is larger than the vertical dimension of the central circular portion 21A. A housing space for housing the turntable 22 is defined by the upper surface of the circular portion 21A and the like. A left mounting surface 21D and a right mounting surface 21E are defined on the upper surface of the left leg portion 21B and the upper surface of the right leg portion 21C, respectively.

The turntable 22 is made of metal and has a substantially circular shape in plan view. The turntable 22 is connected to the central circular portion 21A via the rotation shaft while being housed in the housing space defined in the base 21. The turntable 22 rotates around the rotation shaft with respect to the base 21. It is rotatable clockwise and counterclockwise in plan view. The vertical position (height) of the upper surface 22A of the turntable 22 substantially coincides with the vertical positions of the left mounting surface 21D of the left leg 21B and the right mounting surface 21E of the right leg 21C. A mounting surface 2A is defined by an upper surface 22A of the turntable 22, a left mounting surface 21D, and a right mounting surface 21E. Further, the base 21 and the turntable 22 are provided to allow the cutting blade P attached to the cutting section 7 to enter when the cutting section 7 is swung so as to approach the mounting surface 2A during the cutting operation. A hollow groove is formed.

The operation part 24 is a part operated by the user when changing and fixing the rotational position of the turntable 22 with respect to the base 21, and as shown in FIG. there is

As shown in FIG. 2, the tilting shaft 25 is provided at the rear portion of the turntable 22 and extends in the front-rear direction. The vertical position of the axis of the tilting shaft 25 coincides with the vertical position of the upper surface 22A of the turntable 22 .

The tilting position adjusting mechanism 26 adjusts the tilting position of the holder 3 with respect to the mounting surface 2A, that is, the tilting position of the cutting unit 7 with respect to the mounting surface 2A (in other words, the side surface of the cutting blade P attached to the cutting unit 7 and the mounting surface). 2A) and is provided at the rear end of the turntable 22. As shown in FIG. The tilting position adjusting mechanism 26 has a projecting portion 26A and an operating lever 26B.

The protruding portion 26A protrudes upward from the rear end portion of the turntable 22 and has a substantially fan shape when viewed from the rear. The projecting portion 26A is formed with an elongated hole 26a that extends in an arc around the axis of the tilting shaft 25 when viewed from the rear.

The operation lever 26B is a portion operated by the user when changing and fixing the tilting position of the holder 3, and has a shaft portion 26C and a lever portion 26D. The shaft portion 26C extends in the front-rear direction and is inserted through the elongated hole 26a of the projecting portion 26A. A male screw is formed at the front end of the shaft portion 26C, and the front end of the shaft portion 26C is screwed to the rear lower portion of the holder 3. As shown in FIG. The shaft portion 26C can move within the elongated hole 26a of the projecting portion 26A as the holder 3 tilts with respect to the mounting surface 2A. The lever portion 26D is provided at the rear portion of the shaft portion 26C and extends in the radial direction of the shaft portion 26C.

The fence section 23 has a left fence 23A and a right fence 23B, as shown in FIG. The left fence 23A is connected to the upper surface of the left leg 21B and extends in the left-right direction. A front surface of the left fence 23A defines a contacted surface 23C substantially perpendicular to the mounting surface 2A. The right fence 23B is connected to the upper surface of the right leg 21C and extends in the left-right direction. A front surface of the right fence 23B defines a contacted surface 23D substantially perpendicular to the mounting surface 2A. The positions of the contacted surface 23C and the contacted surface 23D in the front-rear direction are substantially the same. When cutting the material to be cut, one surface of the material to be processed is brought into contact with the contacted surface 23C of the left fence 23A and the contacted surface 23D of the right fence 23B to perform stable cutting work. becomes possible.

As shown in FIGS. 1 and 2, the holder 3 is positioned in front of the tilt position adjustment mechanism 26 at the rear of the turntable 22 and extends upward. The lower part of the holder 3 is connected to the rear part of the turntable 22 via the tilting shaft 25, and the holder 3 is tilted horizontally with respect to the mounting surface 2A (base portion 2) about the axis of the tilting shaft 25. It can tilt in any direction. A screw hole is formed in the rear portion of the holder 3, and the shaft portion 26C of the operation lever 26B is screwed into the screw hole.

When changing the tilting position of the holder 3 to a desired tilting position, first, the lever portion 26D of the operating lever 26B is rotated counterclockwise in a rear view to loosen the screwing between the shaft portion 26C and the holder 3. , so that the holder 3 can be tilted with respect to the mounting surface 2A. Thereafter, the holder 3 is tilted to a desired tilting position, and the lever portion 26D is rotated clockwise in the rear view to fix the holder 3 at the desired tilting position. By the above procedure, the user can change and fix the tilting position of the holder 3 (cutting section 7) to a desired tilting position. The angle can be set as desired. As a result, so-called bevel cutting can be performed using the tabletop circular saw 1 .

As shown in FIGS. 1 and 2, the cutting part support part 4 is supported by the holder 3 and can tilt together with the holder 3 with respect to the mounting surface 2A. The cutting part support part 4 supports the cutting part 7 so as to be swingable toward and away from the mounting surface 2A and to be movable in the front-rear direction with respect to the mounting surface 2A. The wiring supporting portion 6 is provided on the cutting portion supporting portion 4 and supports a wiring 9 extending from the lighting portion 5 and supplying electric power to the lighting portion 5 . The lighting section 5 is provided at the front end portion of the cutting section support section 4 . The illumination unit 5 has a light source and is configured to irradiate the mounting surface 2A with light. Details of the cutting part support part 4, the lighting part 5, the wiring support part 6, and the wiring 9 will be described later.

The cutting part 7 is configured such that the cutting blade P is detachable, and can rotatably support the mounted cutting blade P around an axis A described later. As described above, the cutting part 7 is provided with a cutting part supporting part that can swing toward and away from the mounting surface 2A (base part 2) and can move in the front-rear direction with respect to the mounting surface 2A. 4 is supported. Further, the cutting part 7 can be tilted in the horizontal direction with respect to the mounting surface 2</b>A integrally with the holder 3 and the cutting part supporting part 4 . The cutting portion 7 includes a first housing 71, a second housing 72 that houses the motor 8, a cover portion 73, a handle portion 74, an output shaft portion (not shown), a power transmission mechanism (not shown), have.

The first housing 71 constitutes the left portion of the cutting portion 7 and has a flat shape with a dimension in the left-right direction that is smaller than the dimensions in the vertical direction and the front-rear direction. The lower portion of the first housing 71 is connected to the cutting portion support portion 4 via a swing shaft 42C, which will be described later, and the first housing 71 is cut so as to swing toward and away from the mounting surface 2A. It is supported by the part support part 4 . The first housing 71 accommodates an output shaft portion, a power transmission mechanism, wiring, and the like. Also, the first housing 71 is provided with a power cord 71A and a switch portion 71B.

The output shaft portion is arranged in the front portion within the first housing 71 and extends in the left-right direction. The right end portion of the output shaft portion is configured such that the cutting blade P can be attached and detached, and protrudes rightward from an opening formed in the front portion of the right side wall of the first housing 71 . The output shaft portion supports the cutting blade P so as to be rotatable about the axis A of the output shaft portion while the cutting blade P is mounted thereon.

The power transmission mechanism is a reduction mechanism having a plurality of pulleys, a plurality of belts, etc., and is provided between the motor 8 housed in the second housing 72 and the output shaft portion, and transmits the rotational force of the motor 8. It is configured to transmit to the output shaft portion.

The power cord 71A has a cord portion extending rearward from the rear end portion of the first housing 71, and an outlet plug (not shown) provided at the extending end portion of the cord portion. The outlet plug can be connected to an AC power source S that serves as a power source for the motor 8 . The AC power supply S is, for example, a commercial AC power supply, an AC generator, or the like. The AC power supply S is an example of a "motor power source" in the present invention. The outlet plug is an example of the "first power supply connecting part" in the present invention.

The switch section 71B is provided on the upper surface of the first housing 71, as shown in FIG. 2, and has an operation switch 71C and a signal output circuit (not shown). The operation switch 71C is a push button for switching between an ON state and an OFF state of the illumination unit 5 (that is, a state in which power is supplied to the light source of the illumination unit 5 and a state in which power is not supplied to the light source). is a switch.

The second housing 72 has a substantially cylindrical shape extending rightward from the upper portion of the right side wall of the first housing 71, as shown in FIG. Inside the second housing 72, the motor 8 is arranged such that a rotating shaft (not shown) of the motor 8 extends in the left-right direction. A rotating shaft (not shown) of the motor 8 is connected to a power transmission mechanism housed in the first housing 71 .

The cover portion 73 is located on the right side of the first housing 71 and in front of the second housing 72, and has a saw cover 73A and a protective cover 73B. The saw cover 73A has an arcuate shape in a side view so as to partially cover the cutting blade P attached to the output shaft, and is connected to the front portion of the right side wall of the first housing 71 . The protective cover 73B is provided on the saw cover 73A and is rotatable along the outer edge of the saw cover 73A.

The handle portion 74 is provided on the upper surface of the saw cover 73A and has a substantially inverted U shape when viewed from the side. The handle portion 74 is a portion that is gripped by the user when swinging the cutting portion 7 and has a trigger 74A for controlling driving of the motor 8 . Further, inside the handle portion 74, a switch mechanism 74B (FIG. 3) is provided that switches between an ON state and an OFF state in mechanical interlock with the operation of the trigger 74A. Details of the switch mechanism 74B will be described later.

Next, the electrical configuration of the tabletop circular saw 1 will be described with reference to FIG. FIG. 3 is a block diagram showing the electrical configuration of the tabletop circular saw 1, showing a state in which the outlet plug of the power cord 71A is connected to the AC power source S. As shown in FIG. The tabletop circular saw 1 includes, as electrical components, the motor 8, the first line 90, the second line 91, the switch mechanism 74B, the voltage converter 92, the plus line 93, and the minus line. 94, the illumination unit 5 described above, a switching element 95, the switch unit 71B described above, and a controller 96. The AC power source S is an example of the "power source for the lighting section" in the present invention.

The motor 8 is a motor with brushes, and has an armature coil 81 that rotates integrally with the aforementioned rotating shaft, a stator coil 82 and a brake coil 83 .

The first line 90 and the second line 91 are electric circuits for supplying electric power to the motor 8, and a part of the first line 90 and the second line 91 are accommodated in the cord portion of the power cord 71A.

The switch mechanism 74B has an ON contact 74C, an OFF contact 74D, and a COM contact 74E. When the trigger 74A is pulled (that is, the trigger 74A is turned ON), the switch mechanism 74B enters an ON state in which the ON contact 74C and the COM contact 74E are connected to supply power to the motor 8. A power supply circuit is formed for On the other hand, when the pull operation on the trigger 74A is released (that is, when the trigger 74A is turned OFF), the switch mechanism 74B is in an OFF state in which the OFF contact 74D and the COM contact 74E are connected, and brakes the motor 8. A braking circuit is formed for applying and stopping the motor.

The voltage converter 92 is connected to the first line 90 and the second line 91 . The voltage converter 92 is a circuit that rectifies, smoothes, and steps down the AC voltage of the AC power supply S applied between the first line 90 and the second line 91 to generate a control voltage.

A plus line 93 and a minus line 94 are electrical paths for supplying power to the illumination section 5, the controller 96, and the switch section 71B. The plus line 93 and the minus line 94 are connected to the voltage conversion section 92 , and a control voltage generated by the voltage conversion section 92 is applied between the plus line 93 and the minus line 94 . The minus line 94 is connected to GND (not shown).

The lighting section 5 is connected in series with the switching element 95 between the plus line 93 and the minus line 94 . More specifically, the lighting section 5 is connected to the plus line 93 by a first connection line 97 and to the switching element 95 by a second connection line 98 .

The switching element 95 is, for example, an FET. The drain of the switching element 95 is connected to the lighting section 5 by a second connection line 98 , the source is connected to the minus line 94 , and the gate is connected to the controller 96 . When an ON signal is input from the controller 96 to the gate of the switching element 95, power is supplied to the LED of the lighting section 5, and the lighting section 5 is turned ON to irradiate the mounting surface 2A with light. On the other hand, when the input of the ON signal to the gate of the switching element 95 is stopped, the power supply to the LED of the lighting unit 5 is cut off, and the lighting unit 5 is turned off to stop emitting light.

The switch section 71 B is connected between the plus line 93 and the minus line 94 , and the signal output circuit of the switch section 71 B is connected to the controller 96 . The signal output circuit is configured to output either the light ON signal or the light OFF signal to the controller 96 according to the operation of the operation switch 71C. More specifically, the signal output circuit is configured to switch the output signal between the light ON signal and the light OFF signal each time the operation switch 71C of the switch section 71B is pressed.

Controller 96 is connected between plus line 93 and minus line 94 . The controller 96 is, for example, a microcomputer, and is configured to control the ON state and OFF state of the lighting section 5 based on the light ON signal and the light OFF signal output from the signal output circuit of the switch section 71B. Specifically, when a light ON signal is output from the signal output circuit, the controller 96 outputs an ON signal to the switching element 95 to turn on the lighting unit 5 to emit light. On the other hand, when the light OFF signal is output from the signal output circuit, the controller 96 stops outputting the ON signal to the switching element 95 to turn off the illumination unit 5 to stop the light irradiation.

Next, the details of the cutting part supporting part 4, the lighting part 5, the wiring supporting part 6, and the wiring 9 will be described.

The cutting section support section 4 has a first support section 41 and a second support section 42 . As shown in FIG. 1, the first support portion 41 has a first rod 41A, a second rod 41B, and a connecting portion 41C.

The first rod 41A and the second rod 41B are made of a high-rigidity material such as a pipe material, and are arranged in a direction parallel to the mounting surface 2A of the base portion 2 and orthogonal to the axis A (in the present embodiment, It has a hollow cylindrical shape extending in the front-rear direction. The first rod 41A and the second rod 41B are arranged substantially parallel to each other with a predetermined gap in the vertical direction, and the rear ends of the first rod 41A and the second rod 41B are fixed to the holder 3. . Further, the lengths of the first rod 41A and the second rod 41B in the front-rear direction are substantially the same, and are configured to be shorter than the length in the front-rear direction of the mounting surface 2A. The first rod 41A and the second rod 41B are examples of "two shaft members" in the present invention.

The connecting portion 41C extends in the vertical direction, and the front ends of the first rod 41A and the second rod 41B are fixed to the rear portion of the connecting portion 41C by screws or the like. In other words, the first rod 41A and the second rod 41B are connected by the connecting portion 41C.

As shown in FIGS. 1 and 2, the second support portion 42 has a sliding portion 42A and a swing support portion 42B. The sliding portion 42A constitutes the left portion of the second support portion 42, and is provided so as to straddle the first rod 41A and the second rod 41B. Specifically, the first rod 41A and the second rod 41B are inserted through the sliding portion 42A, and the sliding portion 42A moves between the holder 3 and the connecting portion 41C. It is configured to be slidable on 41B (that is, slidable in the front-rear direction).

As shown in FIG. 2, the rocking support portion 42B is a portion extending downward to the right from the sliding portion 42A, and supports the cutting portion 7 so as to rock. More specifically, as shown in FIGS. 1 and 2, the swing support portion 42B has a swing shaft 42C extending in the left-right direction, and the cutting portion 7 moves through the swing shaft 42C. It is connected to the swing support portion 42B. Thus, the rocking support portion 42B supports the cutting portion 7 so as to move toward and away from the mounting surface 2A (base portion 2) about the axis B of the rocking shaft 42C. The axis B is an example of the "swing axis" in the present invention. The horizontal direction is an example of the "first direction" in the present invention.

Further, the swing shaft 42C is provided with a biasing member (not shown) that biases the cutting portion 7 in a direction (clockwise direction in FIG. 1) away from the mounting surface 2A. As a result, the cutting part 7 is biased by the biasing member in a state where no external force is applied, and the cutting part 7 is moved to the uppermost position in the swingable range, that is, away from the mounting surface 2A. It is configured to stop at a position (hereinafter referred to as "top dead center of the cutting section 7"). When the cutting portion 7 is swung to the lowest position (hereinafter referred to as the bottom dead center of the cutting portion 7), the lower end of the cutting blade P is positioned at the center of the placement surface 2A in the left-right direction. It is configured to be positioned inside a formed groove (not shown). 1 and 2 show a state in which the cutting portion 7 is positioned at the top dead center.

Thus, the second support portion 42 that rockably supports the cutting portion 7 can slide in the front-rear direction with respect to the first support portion 41 . In other words, the first support portion 41 supports the cutting portion 7 via the second support portion 42 so as to be movable in the front-rear direction with respect to the placement surface 2A (base portion 2). With such a configuration, the cutting part support part 4 can move the cutting part 7 in the front-rear direction with respect to the mounting surface 2A and move the cutting part 7 toward and away from the mounting surface 2A. It is supported swingably around B. The front-rear direction is an example of the "third direction" in the present invention.

The lighting section 5 is an LED unit having an LED as a light source, and is provided in front of the lower end of the connecting section 41C. The illumination unit 5 (more specifically, the LED of the illumination unit 5) is configured to irradiate the mounting surface 2A with irradiation light within a predetermined irradiation range. In addition, the lighting section 5 is located on the opposite side of the base section 2 with respect to the axis B of the swing shaft 42C in the direction perpendicular to the mounting surface 2A (vertical direction in this embodiment). That is, the lighting unit 5 is positioned above the axis B of the swing shaft 42C. The vertical direction is an example of the "second direction" in the present invention.

Here, the irradiation range of the irradiation light of the illumination unit 5 will be described. As shown in FIGS. 1 and 2, the illumination range of the illumination unit 5 is an area surrounded by a substantially conical shape centered on the optical axis RO. The irradiation light RF shown in FIGS. 1 and 2 is irradiation light that defines the conical outer peripheral surface.

The optical axis RO extends from the illumination section 5 and intersects the mounting surface 2A. More specifically, as shown in FIG. 1, the optical axis RO of the illumination unit 5 is orthogonal to the mounting surface 2A in a side view, and is positioned at the same position as the illumination unit 5 in the front-rear direction. It intersects with the mounting surface 2A. Further, as shown in FIG. 2, the optical axis RO intersects the mounting surface 2A at a position to the left of the tilting axis 25 when viewed from the front.

Further, the irradiation light RF defining the conical shape intersects the plane including the mounting surface 2A at a position forward of the front end of the base portion 2 and a position slightly forward of the holder 3 in a side view. . Therefore, the area to be illuminated (the area illuminated by the irradiation light) in the front-rear direction corresponds to substantially the entire range in the front-rear direction of the mounting surface 2A. Further, in a front view, the irradiation light RF intersects the mounting surface 2A at the right end and left end of the mounting surface 2A. Therefore, the area to be illuminated in the left-right direction corresponds to substantially the entire range in the left-right direction of the mounting surface 2A.

With such a configuration, when the workpiece is not placed on the placement surface 2A, substantially all of the upper surface 22A of the turntable 22 in the placement surface 2A is irradiated with the light from the illumination unit 5. In addition, substantially all of the left mounting surface 21D and the right mounting surface 21E of the base 21 among the mounting surfaces 2A are also irradiated with the light from the illumination unit 5. As shown in FIG.

Even when the workpiece is placed on the mounting surface 2A, the workpiece is positioned between the mounting surface 2A and the illumination unit 5, so the upper surface of the workpiece is irradiated with light. be done. At this time, the region to be illuminated on the upper surface of the workpiece includes a region corresponding to the position of the groove portion of the turntable 22 . As a result, when cutting the material to be processed, it is possible to irradiate light onto a region including the portion where the cutting blade P cuts into the material to be processed.

Further, when the holder 3 is tilted by a predetermined angle with respect to the mounting surface 2A, the lighting section 5 is also tilted by the predetermined angle. At this time, the angle formed by the optical axis RO and the placement surface 2A is tilted by the predetermined angle. Even when the holder 3 is tilted, the light from the illumination unit 5 is configured to irradiate a predetermined area on the mounting surface 2A. Specifically, as shown in FIG. 4, even if the tilting angle of the holder 3 is the maximum tiltable angle, the illuminated area does not include the grooves of the turntable 22 on the upper surface of the workpiece. is configured to include the positions of and corresponding regions.

Furthermore, since the illumination unit 5 is located on the opposite side of the base portion with respect to the axis B, the irradiation range of the light from the illumination unit 5 is larger than when the illumination unit 5 is provided on the base side with respect to the axis B. can be widened, workability can be further improved.

The wiring support portion 6 is provided on the first support portion 41 and has a front projection 61 , a rear projection 62 and a rod portion 63 .

The front projection 61 protrudes leftward from the left wall of the connecting portion 41C and is positioned between the first rod 41A and the second rod 41B in the vertical direction.

The rear projection 62 protrudes leftward from the upper left side surface of the holder 3 and is provided at the same position as the front projection 61 in the left-right direction and the vertical direction.

The rod portion 63 has a rod shape and extends in the same direction (that is, the front-rear direction) as the first rod 41A and the second rod 41B. A front end portion of the rod portion 63 is connected to a rear end portion of the front projection 61 , and a rear end portion of the rod portion 63 is connected to a front end portion of the rear projection 62 . In other words, the rod portion 63 extends in the front-rear direction at the same position as the front projection 61 and the rear projection 62 in the vertical direction and the left-right direction, and is fixed from the front and rear sides by the front projection 61 and the rear projection 62. . Further, the rod portion 63 is positioned between the first rod 41A and the second rod 41B in the vertical direction, and the left end of the rod portion 63 is positioned to the left of the left ends of the first rod 41A and the second rod 41B. located in

The wiring 9 is a wiring for supplying power to the lighting section 5, and corresponds to the first connection line 97 and the second connection line 98 in FIG. The wiring 9 has an extension portion 9A, a winding portion 9B, a connection portion 9C, and a accommodated portion 9D.

The extending portion 9A is a portion that extends outside from a hole (not shown) formed in the left wall of the first housing 71 . One end of the extending portion 9A is connected to a connection wire extending inside the first housing 71 from the wiring accommodated in the second housing 72, and the other end of the extending portion 9A is connected to the winding portion 9B. ing.

The wound portion 9B is a portion wound around the outer peripheral surface of the rod portion 52, and has a plurality of wound portions 9E. The wound portion 9E is a wire wound around the rod portion 63 for one round. In the state of FIG. 1, the two wound portions 9E adjacent to each other in the front and rear direction are wound around the rod portion 63 while being in contact with each other. Among the plurality of winding portions 9E, the most forward winding portion 9E is connected to the other end of the extension portion 9A, and the rearmost winding portion 9E is fixed to the rod portion 63. ing. When the winding portion 9B is pulled forward by an external force, the rod portion 63 is extended except for the most rearward winding portion 9E while widening the interval between the plurality of winding portions 9E and two adjacent winding portions 9E. It is configured to slide forward on the top. That is, the winding portion 9B is configured to be extendable in the front-rear direction.

The connecting portion 9C is a portion that connects the winding portion 9B and the accommodated portion 9D. One end of the connection portion 9C is connected to the rearmost winding portion 9E of the winding portions 9E of the winding portion 9B, and the other end of the connection portion 9C is connected to the accommodated portion 9D. there is A portion near one end of the connecting portion 9C is exposed to the outside, and a portion near the other end of the connecting portion 9C extends into the holder 3 through a hole (not shown) formed in the upper rear portion of the holder 3.

The accommodated portion 9D is a portion accommodated in the internal space of the second rod 41B. The accommodated portion 9D has substantially the same length as the second rod 41B and extends in the front-rear direction. The rear end of the accommodated portion 9D is connected to the other end of the connection portion 9C, and the front end of the accommodated portion 9D is connected to the illumination portion 5 (specifically, the LED). Even if the plurality of wound portions 9E slide forward on the rod portion 63 due to an external force, since the rearmost wound portion 9E is fixed to the rod portion 63, the portion 9D to be accommodated does not move. No external force is transmitted, and the position of the accommodated portion 9D inside the second rod 41B does not change.

Next, referring to FIGS. 1 and 5, a cutting operation for cutting a workpiece by swinging the cutting portion 7 so as to approach the placement surface 2A and the operation of the desktop circular saw 1 will be described. The cutting operation is started in a state where the outlet plug of the power cord 71A is connected to the AC power source S and the cutting portion 7 is positioned at the top dead center (state shown in FIG. 1). In this state, the lighting unit 5 is in the OFF state.

In the above state, when the operator presses the operation switch 71C, the signal output circuit outputs a light ON signal to the controller 12. FIG. When the controller 12 receives the light ON signal, it outputs an ON signal to the switching element 95 to turn on the lighting section 5 . As a result, the illumination unit 5 starts irradiating light, and the mounting surface 2A is irradiated with the light. In this state, when the operator places the workpiece on the placement surface 2A, the upper surface of the workpiece is irradiated with light.

Next, when the operator stands in front of the desktop circular saw 1, grips the handle portion 74, and pulls the trigger 74A, the ON contact 74C and the COM contact 74E of the switch mechanism 74B are connected. state, and power is supplied to the motor 8 . When electric power is supplied to the motor 8, the rotating shaft of the motor 8 starts rotating, and the rotational force of the motor 8 (rotating shaft) is transmitted to the output shaft portion via the power transmission mechanism. The cutting blade P attached to the part starts to rotate around the axis A.

With the cutting blade P rotating, when the operator swings the cutting part 7 about the axis B of the swing shaft 42C to the bottom dead center so as to approach the workpiece on the mounting surface 2A ( 5), the lower portion of the cutting blade P enters the groove of the turntable 22. As shown in FIG. Due to this swinging motion, the workpiece is cut by the rotating cutting blade P and divided into two.

In the cutting work described above, since the region corresponding to the position of the groove portion of the turntable 22 is included in the illuminated region on the upper surface of the workpiece, the portion where the cutting blade P cuts into the workpiece is irradiated with light. ing. Therefore, the operator can perform the cutting operation while confirming the cut portion of the workpiece, which improves workability.

Further, when the cutting part 7 swings so as to come close to the workpiece on the mounting surface 2A in the cutting work described above, the cutting part supporting part 4 and the lighting part provided on the cutting part supporting part 4 5 is not changed with respect to the mounting surface 2A. That is, in the above-described cutting work using the tabletop circular saw 1 according to the present embodiment, the irradiation range of the light from the illumination unit 5 does not change, and the illuminated area on the workpiece placed on the placement surface 2A is The extent of the area does not change either. With such a configuration, when the operator performs the cutting work, it is possible to suppress the change in the illuminated area due to the swinging of the cutting part 7, so that the workability can be improved.

Next, with reference to FIG. 6, a cutting operation for cutting by sliding the cutting portion 7 forward and backward with respect to the mounting surface 2A and the operation of the tabletop circular saw 1 will be described. This cutting operation is performed when cutting a workpiece that is long in the front-rear direction so that only a part of the workpiece can be cut only by swinging the cutting portion 7 .

When performing the cutting work, in the state shown in FIG. 1, the operator presses the operation switch 71C to turn on the illumination unit 5 to irradiate light, and places the workpiece on the placement surface 2A.

Next, the operator applies an external force so as to pull the cutting portion 7 forward. At this time, the sliding portion 42A of the second support portion 42 slides on the first rod 41A and the second rod 41B of the first support portion 41 to move forward. The cutting part 7 supported by 42 also moves forward while being positioned at the top dead center (FIG. 6).

Thereafter, the operator stands in front of the tabletop circular saw 1, grips the handle portion 74, pulls the trigger 74A to rotate the cutting blade P, and moves the cutting portion 7 from the top dead center to the bottom dead center. oscillate until This cuts the front part of the workpiece.

Next, the operator applies an external force so as to push the cutting portion 7 backward. At this time, the sliding portion 42A of the second support portion 42 slides on the first rod 41A and the second rod 41B of the first support portion 41 to move rearward. The cutting part 7 supported by 42 also moves backward while being positioned at the bottom dead center. Due to the rearward movement of the cutting part 7, the workpiece that is long in the front-rear direction is cut and divided into two.

In the above-described cutting work, as shown in FIG. 6, as the cutting portion 7 moves forward, the extending portion 9A of the wiring 9 extending outward from the cutting portion 7 also moves forward and extends. A wound portion 9B connected to the portion 9A extends forward. In addition, along with the rearward movement of the cutting portion 7, the extending portion 9A of the wiring 9 extending to the outside from the cutting portion 7 also moves rearward, and the winding portion 9B connected to the extending portion 9A is Compressed backwards.

In the above-described cutting work, when the cutting portion 7 moves forward with respect to the placement surface 2A (base portion 2), the cutting portion support portion 4 and the lighting portion 5 provided on the cutting portion support portion 4 are turned off. The position with respect to the mounting surface 2A (base portion 2) has not changed. That is, in the cutting work using the tabletop circular saw 1 according to the present embodiment, the range of the light emitted from the illumination unit 5 does not change, and the range of the illuminated area does not change. With such a configuration, when the operator performs the cutting work, it is possible to suppress the change in the illuminated area due to the swinging of the cutting part 7, so that the workability can be improved.

As described above, the desktop circular saw 1 includes the cutting portion 7 to which the cutting blade P can be attached, the base portion 2 having the mounting surface 2A on which the workpiece can be placed, and the cutting portion 7 arranged in a predetermined direction (this embodiment In the embodiment, the cutting part supporting part 4 is provided in the cutting part supporting part 4 and the cutting part supporting part 4 that swingably supports the mounting surface 2A so as to approach and separate from the mounting surface 2A about the axis B extending in the left and right direction). and an illumination unit 5 capable of irradiating light toward the mounting surface 2A. Further, the illumination section 5 is located on the side opposite to the base section 2 with respect to the axis B in the direction perpendicular to the mounting surface 2A (vertical direction in the present embodiment). With such a configuration, when the cutting section 7 swings about the axis B with respect to the mounting surface 2A, the positional relationship between the lighting section 5 and the mounting surface 2A does not change. It is possible to suppress changes in the light irradiation range and the illuminated region and improve workability. In addition, since the illumination unit 5 is positioned on the opposite side of the base portion with respect to the axis B, the illumination range of the light from the illumination unit 5 is reduced compared to the case where the illumination unit 5 is provided on the base side with respect to the axis B. Since it can be widened, workability can be further improved.

Further, the cutting portion supporting portion 4 of the tabletop circular saw 1 is capable of moving the cutting portion 7 with respect to the mounting surface 2A in a direction intersecting with the direction in which the axis B extends (in this embodiment, the front-rear direction). It has a first support portion 41 for supporting.

Also, the illumination section 5 of the tabletop circular saw 1 is provided on the first support section 41 . As a result, when the cutting part 7 swings about the axis B with respect to the mounting surface 2A, it is possible to suppress a change in the irradiation range of the light of the illumination part 5 and improve workability. .

The first support portion 41 of the tabletop circular saw 1 includes two shaft members, a first rod 41A and a second rod 41A, extending in a direction intersecting the direction in which the axis B extends (in this embodiment, the front-rear direction). It has a rod 41B and a connecting portion 41C that connects the first rod 41A and the second rod 41B. It is supported so as to be movable in a direction intersecting the direction in which B extends (in this embodiment, the front-rear direction). Furthermore, the lighting section 5 is provided in the connecting section 41C. Note that the tabletop circular saw 1 according to the present embodiment includes two shaft members, the first rod 41A and the second rod 41B, but the number of shaft members is not limited to two, and may be two or more. may be With such a configuration, the cutting part 7 can be stably supported as compared with the case where only one shaft member is used.

The tabletop circular saw 1 further includes a wiring 9 connected to the lighting section 5 to supply power to the lighting section 5, and a wiring support section 6 provided on the first support section 41 and supporting the wiring 9. ing.

Next, a desktop circular saw 100, which is an example of a cutting machine according to a second embodiment of the present invention, will be described with reference to FIGS. The same components and elements of the tabletop circular saw 100 as those of the tabletop circular saw 1 are denoted by the same reference numerals, and descriptions thereof are omitted, and only different configurations and elements are described. In addition, the configuration and elements of the tabletop circular saw 100 that are the same as those of the tabletop circular saw 1 produce the same effects as those of the tabletop circular saw 1 .

As shown in FIGS. 7 and 8, the tabletop circular saw 100 of the second embodiment includes a connecting portion 141C and a switching portion 171B instead of the connecting portion 41C and the switching portion 71B. Further, the tabletop circular saw 100 does not have the wiring support portion 6 and the wiring 9 that the tabletop circular saw 1 has.

A battery housing space 141D is defined in the connecting portion 141C, and a battery connecting portion 141E is housed in the battery housing space 141D.

The battery housing space 141D is formed in front of the first rod 41A inside the connecting portion 141C. The battery accommodation space 141D is configured to accommodate a DC power supply C (two dry batteries in the present embodiment) that supplies power to the illumination unit 5 . A lid (not shown) that can be opened and closed is provided at the upper end of the connecting portion 141C, and the battery housing space 141D is exposed to the outside when the lid is opened. When the user replaces the DC power supply C housed in the battery housing space 141D, the user opens the cover of the connecting part 141C to perform the work.

The battery connection portion 141E is configured to be connectable to the DC power supply C housed in the battery housing space 141D. A wiring extends from the battery connection portion 141E and is connected to the illumination portion 5 . As a result, power can be supplied from the DC power source C to the illumination unit 5 in a state where the DC power source C is connected to the battery connection unit 141E. The DC power supply C is an example of the "power source for the lighting section" in the present invention. The battery connector 141E is an example of the "second power connector" in the present invention.

The switch section 171B has an operation switch 171C in place of the operation switch 71C. The operation switch 171C is a push button switch for switching the ON state and the OFF state of the lighting unit 5, and is provided on the front wall portion of the connecting portion 141C.

Thus, in the desktop circular saw 100 described above, the power source for the motor 8 (that is, the AC power supply S) for rotating the cutting blade P attached to the cutting section 7 and the power source for the lighting section 5 (that is, , DC power source C), and includes an outlet plug that can be connected to the power source of the motor 8 and a battery connection portion 141E that can be connected to the power source of the illumination portion 5 . As a result, when the power source of the motor 8 cannot be used (for example, when the tabletop circular saw 1 is transported while the power cord 71A of the tabletop circular saw 1 is not connected to the AC power source S). However, if the power source of the lighting section 5 is connected, light can be emitted from the lighting section 5, and workability can be improved.

Next, a desktop circular saw 200, which is an example of a cutting machine according to a third embodiment of the present invention, will be described with reference to FIGS. 9 and 10. FIG. The same components and elements of the tabletop circular saw 200 as those of the tabletop circular saw 1 are denoted by the same reference numerals, and descriptions thereof are omitted, and only different configurations and elements are described. Also, the configuration and elements of the tabletop circular saw 200 that are the same as those of the tabletop circular saw 1 produce the same effects as those of the tabletop circular saw 1 .

As shown in FIGS. 9 and 10, the tabletop circular saw 200 of the third embodiment includes a second support 242 instead of the second support 42 provided in the tabletop circular saw 1, and the wiring 9 A wiring 209 is provided in place of the . Moreover, the tabletop circular saw 200 does not have the wiring support portion 6 that the tabletop circular saw 1 has.

The second support portion 242 has a projecting portion 242D. The projecting portion 242D extends rightward from the front portion of the lower end portion of the sliding portion 42A and has a substantially rectangular shape when viewed from the front. A lighting unit 5 is provided below the projecting portion 242D.

The wiring 209 has an accommodated portion 209D instead of the accommodated portion 9D, and does not have the winding portion 9B and the connection portion 9C.

The accommodated portion 209D is a portion accommodated in the internal space of the sliding portion 42A. One end of the accommodated portion 209D is connected to the other end of the extension portion 9A, and the other end of the accommodated portion 209D is connected to the illumination portion 5 (specifically, the LED).

In the desktop circular saw 200 of the present embodiment, when the cutting portion 7 is moved in the front-rear direction with respect to the mounting surface 2A (base portion 2), the position of the lighting portion 5 with respect to the mounting surface 2A (base portion 2) changes, but when the cutting part 7 is swung so as to approach the workpiece on the mounting surface 2A, the cutting part support part 4 and the lighting part 5 provided on the cutting part support part 4 are not changed with respect to the mounting surface 2A. That is, in the cutting operation using the tabletop circular saw 200 according to the present embodiment, there is no change in the irradiation range of the light of the illumination unit 5 caused by the swinging of the cutting unit 7, and the swinging of the cutting unit 7 The illuminated area does not change either. With such a configuration, when the operator performs the cutting work, it is possible to suppress the change in the illuminated area due to the swinging of the cutting part 7, so that the workability can be improved.

The cutting portion support portion 4 in the desktop circular saw 200 described above is provided slidably in a direction intersecting with the direction in which the axis B extends (in the front-rear direction in the present embodiment) with respect to the first support portion 41. The second support portion 42 further has a second support portion 42, which supports the cutting portion 7 so as to swing toward and away from the mounting surface 2A around the axis B. there is Further, the cutting portion 7 is cut in a direction (in the present embodiment, , back and forth), and the illumination unit 5 is provided on the second support unit 42 . As a result, it is possible to suppress the change in the illuminated area due to the swinging of the cutting part 7, so that the workability can be improved.

Although the first, second, and third embodiments of the present invention have been described in detail above, the cutting machine according to the present invention is not limited to the above-described embodiments. Various modifications are possible within the spirit and scope of the claimed invention.

For example, in the tabletop circular saw 1 according to the first embodiment, the rearmost winding portion 9E was fixed to the bar portion 63, but instead, the frontmost winding portion 9E is fixed to the rod portion 63. is fixed to the rod portion 63, one end of the winding portion 9E positioned most forward is connected to the illumination portion 5, and one end of the winding portion 9E positioned most rearward is connected to the left end of the extension portion 9A. good too. In this case, when the sliding portion 42A is at a position close to the holder 3, the two winding portions 9E adjacent to each other in the front and rear are spaced apart from each other, and the sliding portion 42A is at a position close to the connecting portion 41C. 2, the two wound portions 9E adjacent to each other in the front-rear direction are in contact with each other, and the configuration is such that the receiving portion 9D is not provided.

Further, in the desktop circular saw 1 according to the first embodiment, the accommodated portion 9D is accommodated in the inner space of the second rod 41B, but is not limited to this, and is accommodated in the inner space of the first rod 41A. may have been

In addition, in the desktop circular saw 1 according to the first embodiment, the bar portion 63 of the wiring support portion 6 extends to the left of the connecting portion 41C, but is not limited to this, and can extend in the left-right direction. It may extend at substantially the same position as the first rod 41A and the second rod 41B. In this case, the rod portion 63 is configured so as to pass through the sliding portion 42A, and it is possible to suppress an increase in size of the tool main body in the left-right direction.

In addition, in the tabletop circular saw 200 according to the third embodiment, the lighting section 5 is provided on the sliding section 42A, but is not limited to this, and is provided on the front wall section of the rocking support section 42B. may

DESCRIPTION OF SYMBOLS 1, 100, 200... Desk circular saw 2... Base part 2A... Mounting surface 4... Cutting part support part 5... Lighting part 6... Wiring support part 7... Cutting part 8... Motor 9, 209... Wiring 41A... First rod 41B... Second rod 41C, 141C... Connecting part 42, 242... Second supporting part 42C... Swing shaft 141E... Battery connecting part

Claims (7)

a cutting portion to which a cutting blade can be attached;
a base portion having a mounting surface on which a workpiece can be mounted;
a cutting part supporting part that swingably supports the cutting part so as to move toward and away from the mounting surface about a swing axis extending in a first direction;
a lighting unit provided in the cutting unit support unit and capable of irradiating light toward the mounting surface,
The cutting machine according to claim 1, wherein the illumination section is located on the opposite side of the base section with respect to the swing axis in a second direction orthogonal to the mounting surface. 2. The cutting part supporter according to claim 1, wherein the cutting part supporting part has a first supporting part that supports the cutting part movably in a third direction intersecting the first direction with respect to the mounting surface. cutting machine. 3. The cutting machine according to claim 2, wherein the lighting section is provided on the first support section. The first supporting portion includes at least two shaft members extending in the third direction and supporting the cutting portion movably in the third direction with respect to the mounting surface, and the at least two shaft members. and a connecting portion that connects the
4. The cutting machine according to claim 3, wherein the lighting section is provided on the connecting section. The cutting part supporting part further has a second supporting part slidably provided in the third direction with respect to the first supporting part,
The second support part supports the cutting part so as to be swingable about the swing axis so as to approach and separate from the mounting surface,
the cutting portion moves in the third direction with respect to the mounting surface by sliding the second support portion with respect to the first support portion;
3. The cutting machine according to claim 2, wherein the illumination section is provided on the second support section. Wiring connected to the lighting unit for supplying power to the lighting unit;
6. The cutting machine according to any one of claims 2 to 5, further comprising: a wiring support portion provided on said first support portion for supporting said wiring. a motor for rotating the cutting blade attached to the cutting part;
a first power connection connectable to a power source of the motor;
7. The cutting machine according to any one of claims 1 to 6, further comprising a second power supply connection unit connectable to a power source of the lighting unit different from a power source of the motor. .

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