JP2021104662A - Bench cutting machine - Google Patents

Abstract

To enhance a dust resistance by restricting cut powder blown from a fixed cover when the cut powder is dispersed toward a user as the cut powder occurred by the cutting is blown from a front region of the fixed cover covering a blade tool to downward in a bench cutting machine.SOLUTION: A shield member 22 is provided along a front end rim of a fixed cover 13 utilizing a light emitting device 20 equipped at the fixed cover 13. The shield member 22 is projected from an inner periphery of the fixed cover 13 toward a blade tool 12. The shield member 22 restricts cut powder of a cutting material from blowing out from the front end rim of the fixed cover 13.SELECTED DRAWING: Figure 2

Description

The present invention relates to a tabletop cutting machine, for example, called a slide circular saw or a tabletop circular saw, which is mainly used for cutting wood.

The desktop cutting machine has a table on which the cutting material is placed and a cutting machine main body that is supported so as to be movable up and down with respect to the table. The cutting machine main body has, for example, a circular rotary cutting tool rotated by an electric motor and a fixed cover for covering the rotary cutting tool.

The technology relating to the desktop cutting machine is disclosed in the following patent documents. The desktop cutting machine of Patent Document 1 has a light emitting device that irradiates light from the rear to the front of the rotary cutting tool. This light emitting device enhances the visibility of the cut portion. The desktop cutting machine of Patent Document 2 has a light emitting device at the front portion of the fixed cover. Light is emitted downward from this light emitting device to improve the visibility of the cut portion. Patent Document 3 discloses a desktop cutting machine in which a laser beam for positioning a cutting material is irradiated from the rear of the cutting machine main body toward the upper surface of the cutting material. Patent Document 4 discloses a desktop cutting machine in which a laser beam for positioning a cutting material is emitted from a front end portion of a fixed cover to an upper surface of a cutting material through a transmission window portion of a movable cover.

Japanese Unexamined Patent Publication No. 2015-123543 U.S. Pat. No. 6,742,430 Japanese Unexamined Patent Publication No. 2002-178220 Japanese Unexamined Patent Publication No. 2011-245564

In the desktop cutting machine, a user (a worker who operates the desktop cutting machine) is located on the front side of the fixed cover. The cutting powder generated by cutting flows in the fixed cover. For this reason, it is desirable that the fixed cover is a portion where the light emitting device is arranged and is configured so as to prevent the cut powder from being scattered to the user in particular. In the present invention, the dustproof property of the fixed cover is enhanced.

According to one feature of the present disclosure, the tabletop cutting machine has a table on which the cutting material is placed, and a cutting machine main body in which the rear portion is rotatably supported with respect to the table and swings in the vertical direction. Further, the desktop cutting machine has a cutting tool rotated by an electric motor provided in the cutting machine main body, a fixed cover covering the upper side of the cutting tool, and a shielding member. The shielding member projects from the inner peripheral side of the front region of the fixed cover toward the cutting tool and regulates the cutting powder of the cutting material from being blown out from the front region.

Therefore, the shielding member reduces the amount of cutting powder blown downward from the front region of the fixed cover. This enhances the dust resistance of the fixed cover. Scattering of cutting powder from the front area of the fixed cover toward the user is reduced.

According to another feature of the present disclosure, the tabletop cutting machine has a table on which the cutting material is placed, and a cutting machine main body in which the rear portion is rotatably supported with respect to the table and swings in the vertical direction. Further, the desktop cutting machine is a light emitting device including a cutting tool rotated by an electric motor provided in the cutting machine main body, a fixed cover covering the upper side of the cutting tool, and a light source that emits light toward the cutting material or the cutting tool on the table. Has. The light emitting device has a shielding member that projects from the light emitting device in the direction from the inner circumference of the fixed cover toward the cutting tool and regulates the cutting powder of the cutting material to be blown out from the fixed cover.

Therefore, the cutting powder blown out from the fixed cover by the shielding member is reduced. As a result, the scattering of cutting powder from the fixed cover toward the user is reduced, and the dustproof property of the fixed cover is improved.

According to other features of the present disclosure, the shielding member is located in the anterior region of the fixed cover. Therefore, it is efficiently suppressed that the cutting powder is blown out from the front region of the fixed cover.

According to another feature of the present disclosure, it has a translucent member that covers the light source and transmits the light emitted by the light source. A shielding member protrudes from the translucent member. Therefore, a part of the translucent member is used as a shielding member. A shielding member is arranged using the translucent member of the light emitting device.

According to another feature of the present disclosure, the translucent member and the shielding member are connected at an angle. Therefore, the shielding member is appropriately arranged with respect to the flow of the cutting powder flowing along the inner circumference of the fixed cover. For example, the translucent member extends tangentially to the circular cutting tool, and the shielding member extends in the radial direction. The cutting edge of the cutting tool is efficiently illuminated by the translucent member extending in the tangential direction. The shielding member extending in the radial direction efficiently shields the cutting powder flowing along the cutting edge of the cutting tool.

According to another feature of the present disclosure, the cutting tool is arranged between the cutting material and the light source on the table so that the shadow of the cutting tool is cast on the upper surface of the cutting material when the light source emits light. Therefore, the cutting tool can be used for the alignment with respect to the Sumi line in which the shadow of the cutting tool is drawn on the cutting material.

According to another feature of the present disclosure, the light source is a light emitting diode. Therefore, the durability and maintainability of the light emitting portion are enhanced.

According to another feature of the present disclosure, the light source is a light emitting device that emits laser light. Therefore, the irradiation area is narrowed and illuminated efficiently. Laser light can be used for Sumi line alignment.

According to another feature of the present disclosure, it has a holding member that holds the translucent member in cooperation with the fixing cover. Therefore, the attachment structure of the translucent member and the shielding member is simplified, and the maintainability at the time of attachment / detachment is improved.

According to another feature of the present disclosure, the shielding member is formed with a recess into which the outer peripheral edge of the cutting tool enters. Therefore, the flow of cutting powder in a wider range around the cutting edge is efficiently shielded by the shielding member that overlaps the outer peripheral edge (cutting edge) of the cutting tool.

It is the whole perspective view of the desktop cutting machine. It is the left side view of the tabletop cutting machine seen from the direction of arrow (II) in FIG. It is a top view of the tabletop cutting machine seen from the direction of middle arrow (III) in FIG. FIG. 2 is an enlarged view of part (IV) in FIG. FIG. 4 is a cross-sectional view taken along the line (V)-(V) in FIG. It is an exploded perspective view of a light emitting device. It is the whole perspective view of the desktop cutting machine. This figure shows a state in which the main body of the cutting machine is moved downward to align the lines of the cutting material. It is a vertical sectional view of a laser apparatus.

Next, an embodiment will be described with reference to FIGS. 1 to 8. As shown in FIGS. 1 to 3, the tabletop cutting machine 1 called a slide circular saw is a cutting machine in which the table 2 on which the cutting material W is placed and the rear portion of the table 2 are rotatably supported and swing in the vertical direction. It has a main body 10. The user is located on the front side of the desktop cutting machine 1 and the cutting machine main body 10 is moved up and down. In the following description, the front side is the front side and the opposite side is the rear side with respect to the user. The user is also used as a reference for the vertical and horizontal directions.

The table 2 has a table upper surface 2a formed on a horizontal plane having a substantially circular shape in a plan view on the upper portion, and is rotatably supported on the upper surface of the base 3 in the left-right direction. On the left and right sides of the table 2, upper surface surfaces 3a of the base, which are integrally provided with the base 3, are arranged. The base upper surface 3a is a horizontal plane formed so as to be flush with the table upper surface 2a. Auxiliary tables 38 are provided on the left and right sides of the upper surface 3a of the base. The auxiliary table 38 can be moved in the left-right direction.

A positioning fence 4 is arranged so as to straddle the upper part of the table 2 between the left and right base upper surfaces 3a. The cutting material W can be brought into contact with the positioning fence 4 to position the table 2 in the surface direction. The positioning fence 4 is composed of a lower base portion 4a and a sub fence 4b. The base portion 4a is fixed to the upper surface 2a of the base. Although the base portion 4a projects above the auxiliary table 38, it is not fixed to the auxiliary table 38 and does not hinder the left and right movement of the auxiliary table 38.

The sub-fence 4b can move in the left-right direction with respect to the base portion 4a. When cutting a cutting material having a long length in the left-right direction, the auxiliary table 38 and the sub-fence 4b can be moved outward to support the cutting material W. By rotating the table 2 left and right with respect to the supported cutting material W, the cutting direction of the cutting tool 12 with respect to the edge of the cutting material W can be changed. The cutting tool 12 can be cut diagonally with respect to the edge of the cutting material W to perform so-called diagonal cutting.

A holder portion 6 that supports the cutting edge plate 5 on the upper surface is provided on the front portion of the table 2 so as to project forward. The front portion of the holder portion 6 is provided with operating members 41 and 42 of two systems of locking mechanisms for locking the rotation position of the table 2. The first operating member 41 for operating the first locking mechanism is arranged in the foreground when viewed from the user. The first operating member 41 is a grip that is gripped with one hand, and the table 2 can be locked at an arbitrary angle position by rotating it around an axis. A first engaging rod (not visible in the figure because it is housed in the holder portion 6) is connected to the first operating member 41. The first engaging rod reaches the upper surface of the base 3 through the inside of the holder portion 6. When the first operating member 41 is rotated to the lock side, the first engaging rod is displaced rearward in the axial direction. As a result, the engaging portion provided on the base 3 is sandwiched and the table 2 is locked at an arbitrary rotation position. When the first operating member 41 is rotated to the unlock side, the engaging portion of the base 3 is released from being sandwiched and the table 2 can be rotated.

The second operating member 42 is arranged on the left side with respect to the first operating member 41. The second operating member 42 is a lever that swings up and down, and is pushed down to release the locked state of the table 2 at a fixed angle position. A second engaging rod 42a is coupled to the second operating member 42. As shown in FIG. 2, the second engaging rod 42a extends back and forth along the lower side of the holder portion 6. When the second operating member 42 is pushed down, the second engaging rod 42a retracts and its tip portion retracts from the lock recess provided in the base 3, so that the table 2 is in a rotatable unlocked state. When the second operating member 42 that releases the push-down operation is returned to the upper lock position by the spring-forced force, the tip of the second engaging rod 42a enters the lock recess of the base 3, and the table 2 has a constant angle. Locked non-rotatably in position.

In addition to the first and second operating members 41 and 42 for locking the rotation position of the table 2, the front portion of the holder portion 6 has a third operating member 43 for fixing the tilting position of the cutting machine main body 10. Is provided. The third operating member 43 is a dial-shaped rotary operating member, which is coaxially arranged behind the first operating member 41. When the third operating member 43 is rotated, a long fixed rod (not visible in the figure) up to the tilting support portion 39 provided at the rear of the table 2 is displaced back and forth.

As will be described later, the cutting machine main body 10 is supported so as to be tiltable to the left and right via the tilt support portion 39. When the third operating member 43 is rotated to the unlock side, the tilting support portion 39 is unlocked and the cutting machine main body 10 can be tilted to the left or right. When the third operating member 43 is rotated to the lock side, the tilting support portion 39 is locked and the cutting machine main body 10 is fixed at a right-angled position or a left-right tilting position. A third operating member 43 for locking and unlocking the tilting support portion 39 is arranged at a close portion where the user can easily operate the tilting support portion 39 without reaching for a large amount. As a result, better operability is ensured as compared with the configuration in which the lock lever, which is conventionally arranged on the rear surface of the tilt support portion, is operated.

As shown in FIG. 2, an adjuster 44 is provided on the lower surface of the holder portion 6. The adjuster 44 is displaced up and down by the rotation operation. By adjusting the vertical position of the adjuster 44 and bringing it into contact with the installation surface, a stable installation state of the desktop cutting machine 1 is ensured while receiving an overhang load during cutting processing on the holder portion 6.

The main body support arm 7 is supported on the rear portion of the table 2 in a state of extending upward via the tilt support portion 39. The main body support arm 7 is supported by a tilt support portion 39 so that the tilt position in the left-right direction can be changed. The tilt support portion 39 is equipped with a right-angle positioning mechanism for positioning the cutting machine main body 10 at a right-angle cutting position and a tilt positioning mechanism for positioning the cutting machine main body 10 at, for example, a 45 ° tilt cutting position. The tilting position of the cutting machine main body 10 is locked by the rotation operation of the third operating member 43.

It has two upper and lower slide bars 8 on the upper part of the main body support arm 7. The two slide bars 8 extend parallel to each other from the upper part of the main body support arm 7 to the front. One main body slider 9 is slidably supported back and forth with respect to the two slide bars 8. The cutting machine main body 10 is supported on the main body slider 9 so as to be swingable up and down via a main body support shaft (not visible in the figure). A slide lock device 8a for locking the position of the rear end of the slide of the cutting machine main body 10 is provided on the upper portion of the main body support arm 7. By locking the cutting machine main body 10 to the rear end position of the slide by the slide lock device 8a, the desktop cutting machine 1 can be conveniently carried and stored.

The cutting machine main body 10 can be swung up and down by the movement operation of the user, and can be slid backward or slid toward the front. By tilting the main body support arm 7 to the left or right via the tilting support portion 39, the cutting material W can be cut diagonally into the cutting tool 12 to perform so-called diagonal cutting.

The cutting machine main body 10 has a circular cutting tool 12 called a tip saw that is rotated by an electric motor 11. As shown in FIG. 3, the electric motor 11 is housed in a motor housing 11a attached to the right side of the fixed cover 13 via a gearhead housing. A DC brushless motor is used for the electric motor 11. The electric motor 11 and the motor housing 11a are attached in an inclined posture in which the right side thereof is inclined in a direction of upward displacement. This makes it possible to set a larger allowable tilt angle to the right side of the cutting machine main body 10.

Although not shown in the figure, the gear head housing includes a reduction gear train for reducing the output of the electric motor 11. The final shaft (spindle) of the reduction gear train is projected into the fixed cover 13. The cutting tool 12 is attached to the protruding portion of the spindle.

A controller housing 11c is provided behind the motor housing 11a. The controller 11b is housed in the controller housing 11c. The operation of the electric motor 11 is controlled by the control board housed in the controller 11b.

The controller 11b is a controller 11b in which a control substrate is housed in a shallow-bottomed case and insulated by a resin mold, and has a substantially rectangular flat plate shape. The control board of the controller 11b includes a control circuit including a microcomputer that transmits a control signal based on the rotor position information detected by the sensor board of the electric motor 11, and an electric motor based on the control signal received from the control circuit. A drive circuit composed of an FET that switches the current of 11 and an auto stop circuit that cuts off the power supply to the electric motor 11 so as not to be over-discharged or over-current depending on the detection result of the state of the battery pack 17 are installed. ing.

The area of approximately half the circumference of the upper side of the cutting tool 12 is covered with the fixed cover 13. A main body support portion 14 is integrally provided on the rear side of the fixed cover 13. The main body support portion 14 is rotatably supported by the main body slider 9 via the main body support shaft, so that the fixed cover 13 is rotatably supported up and down. As shown in FIG. 6, a support hole 14b is provided at the rear portion of the main body support portion 14. Although not visible in the figure, the main body support shaft is inserted into the support hole 14b.

The position of the lower movement end during the lower movement operation of the cutting machine main body 10 is regulated by the hexagon bolt 14c provided on the side portion of the main body support portion 14 coming into contact with the stopper receiving portion 9a on the main body slider 9 side. A switching bolt 14d is provided on the front side of the hexagon bolt 14c to switch the lower moving end position of the cutting machine main body 10. On the other hand, a stopper switching plate 9b is provided on the upper surface of the stopper receiving portion 9a so that the position can be changed to the left or right. By changing the position of the stopper switching plate 9b to the left or right, the switching bolt 14d can be enabled or disabled. When the switching bolt 14d is disabled, the hexagon bolt 14c abuts on the stopper receiving portion 9a to regulate the lower moving end position of the cutting machine main body 10. When the switching bolt 14d is enabled, the switching bolt 14d abuts on the switching plate 9b to regulate the lower moving end position of the cutting machine main body 10.

By switching between valid and invalid of the switching bolt 14d in this way, the cutting depth of the cutting tool 12 with respect to the cutting material W at the lower moving end position of the cutting machine main body 10 can be quickly and accurately switched in two steps. The hexagon bolt 14c and the switching bolt 14d can be finely adjusted in their respective regulation positions by individually adjusting the tightening amount. When the downward operation of the cutting machine main body 10 is released, the cutting machine main body 10 is returned to the upper moving end position by the spring-forced force.

The lower part of the cutting tool 12 is covered with a movable cover 15 that can be opened and closed. The movable cover 15 is gradually opened upward in conjunction with the downward movement of the cutting machine main body 10. When the cutting machine main body 10 is returned upward, the movable cover 15 rotates downward and is closed.

A loop-shaped front handle 16 and a carry handle 18 are provided above the electric motor 11, respectively. The front handle 16 on the front side is gripped when the cutting machine main body 10 is operated up and down. The rear carry handle 18 is gripped when carrying the desktop cutting machine 1.

An adapter accommodating portion 18a for accommodating a communication adapter for short-range wireless communication is provided on the rear side of the carry handle 18. By pairing the communication adapter accommodated in the adapter accommodating portion 18a with an external device (for example, the dust collector 7d described later) arranged at a short distance, the dust collector 7d is linked to the start / stop operation of the desktop cutting machine 1. Is started and stopped. As a result, the work efficiency of the cutting work using the dust collector 7d is improved.

One battery pack 17 is attached to the rear side of the electric motor 11. The electric motor 11 is started by using the electric power of the battery pack 17 as a power source. The battery pack 17 is a lithium-ion battery, which can be used repeatedly by removing it and charging it with a separately prepared charger.

In FIG. 2, the cutting tool 12 that rotates clockwise causes the cutting powder to be blown up from the cutting portion diagonally upward and backward. The blown-up cutting powder is collected by two front and rear dust collection paths of the dust collection guide 19 and the dust collection duct 7a. The dust collection path on the front side has a dust collection guide 19. The dust collection guide 19 is provided on the lower surface side of the main body support portion 14 and behind the cutting tool 12. As shown by the arrow in the figure, a part of the cut powder blown up from the cut portion is received by the dust collection guide 19 and collected (dust collection path on the front side). The dust collection guide 19 has a U-shaped groove shape, and the inside thereof communicates with a connection port 14a provided at the rear portion of the main body support portion 14.

The dust collection path on the rear side has a dust collection duct 7a. The dust collecting duct 7a is provided on the front surface of the main body support arm 7. The dust collecting duct 7a communicates with a dust collecting hose 7b connected to the right side of the main body support arm 7. The dust collecting hose 7b is connected to the right side portion of the main body support portion 14. The dust collecting hose 7b is communicated with the connection port 14a through the inside of the main body support portion 14. Similarly, as indicated by an arrow in the figure, in the dust collection path on the rear side, the cut dust collected by the dust collection duct 7a is collected at the connection port 14a via the dust collection hose 7b.

As the dust collecting hose 7b, a bellows-shaped flexible hose having appropriate elasticity and flexibility is used. As shown in FIG. 1, the dust collecting hose 7b is routed between the connection port of the main body support arm 7 and the connection port of the main body support 14 by a path that is largely curved upward. As a result, a smooth slide operation is performed for the entire slide range in the front-rear direction of the cutting machine main body 10. Moreover, the dust collecting hose 7b is connected to the connection port of the main body support arm 7 and the connection port of the main body support 14 in a state in which they can rotate around the axis. As a result, excessive bending and twisting are released in the middle of the path of the dust collecting hose 7b, and a smoothly curved handling path is maintained. Since excessive bending and twisting do not occur, a sufficient flow path area is secured over the entire path of the dust collection hose, whereby high dust collection efficiency is ensured.

The front and rear dust collection paths are merged inside the main body support portion 14 and on the upstream side of the connection port 14a. Therefore, the cutting powder received by the dust collecting duct 7a is merged with the cutting powder received by the dust collecting guide 19 in front of the connection port 14a. A dust collector 7d is connected to the connection port 14a via a dust collecting hose 7c. The cutting powder of both the front and rear dust collection paths merged on the upstream side of the connection port 14a (the cutting powder received by the dust collection guide 19 and the cutting powder collected by the dust collection duct 7a) are the connection port 14a and the dust collection. Dust is collected by the dust collector 7d via the hose 7c. A simpler dust bag can be attached to the connection port 14a instead of the dust collector 7d.

As shown by the broken line arrow in FIG. 2, a part of the cutting powder that has come off the dust collecting guide 19 and has flowed into the fixed cover 13 flows forward on the wind generated by the rotation of the cutting tool 12. The front region (front portion) of the fixed cover 13 is devised to control the flow of cutting powder. In the present embodiment, as in the cutting machine disclosed in Patent Document 4, one light emitting device 20 is provided in the front region (front portion) of the fixed cover 13. The front region of the fixed cover 13 is a region on the front side of the rotation center C (see FIG. 2) of the cutting tool 12 in a state where the cutting machine main body 10 is substantially located at the lower moving end (during cutting process), and the cutting tool 12 has a front region. It refers to a certain range on the front side corresponding to the exit side in the rotation direction (clockwise direction in FIG. 4). The cutting edge of the cutting tool 12 is displaced downward from the front end portion of the fixed cover 13 and exposed.

Details of the light emitting device 20 of this embodiment are shown in FIGS. 4 to 6. The light emitting device 20 includes a light source 21 that emits light toward the cutting edge of the cutting tool 12 and the cutting material W on the table 2. Further, the light emitting device 20 has a shielding member 22 that regulates the cutting powder to be blown downward from the front end of the fixed cover 13. As shown in FIG. 6, the light emitting device 20 has an arc-shaped base portion 23 that constitutes the outer shell of the fixed cover 13.

The base portion 23 has a pair of engaging portions 23b on the left and right sides of the front portion. Correspondingly, the front portion of the fixed cover 13 has a pair of left and right engaging receiving portions 13b. The left and right engaging portions 23b are engaged with the left and right engaging receiving portions 13b, respectively, and the front side of the base portion 23 is coupled to the fixed cover 13. The rear side of the base portion 23 is connected to the fixing cover 13 side with one fixing screw 25.

It has one light emitting substrate 24 along the inner surface of the base portion 23. The light emitting substrate 24 is positioned by the protrusion 23a provided on the base portion 23, and is coupled to the base portion 23 by one fixing screw 26. As shown in FIG. 4, one light source 21 is provided on the lower surface of the light emitting substrate 24. A light emitting diode (LED) is used as the light source 21.

One light source 21 is arranged on the extension surface of the cutting tool 12 and on the outer peripheral side of the cutting edge of the cutting tool 12 in the radial direction. As a result, as shown in FIG. 7, the shadow of the cutting tool 12 is projected onto the upper surface of the cutting material W as a single line by the light emitted from the light source 21. Since the one line is located on the same surface as the cutting tool 12, it functions as a positioning line L for aligning the sumi lines.

As shown in FIG. 4, one translucent member 27 is provided below the light source 21. The light-transmitting member 27 is a colorless and transparent resin plate that efficiently transmits the light emitted by the light source 21. The light transmitting member 27 shields the light source 21 from the inner peripheral side of the fixed cover 13 to prevent the light source 21 from dusting.

A light emitting port 28 is provided below the light transmitting member 27. The light emitted by the light source 21 is emitted toward the cutting edge of the cutting tool 12 and the cutting material W on the table 2 through the translucent member 27 and the light emitting port 28. The front portion of the translucent member 27 is sandwiched between the pedestal portion 13a of the fixed cover 13 and the cylindrical portion 23c of the base portion 23.

A circular pressing portion 27a is provided on the upper surface of the front portion of the translucent member 27. A cylindrical portion 23c is arranged so as to face the pressing portion 27a above the pressing portion 27a. A set screw 29 is inserted into the inner circumference of the cylindrical portion 23c. The set screw 29 is screwed onto the upper part of the cylindrical portion 23c. The holding screw 29 is tightened, and its tip is pressed against the holding portion 27a of the translucent member 27. As a result, the translucent member 27 is fixed along the pedestal portion 13a of the fixing cover 13. The translucent member 27 is fixed to the cutting tool 12 substantially along the tangential direction.

The set screw 29 functions as a holding member for holding the translucent member 27 in cooperation with the fixing cover 13. By loosening the holding screw 29 as the holding member, the translucent member 27 can be pulled out forward. Only the translucent member 27 can be removed without removing the light emitting device 20. As a result, maintenance work such as removal of cutting powder from the translucent member 27 can be easily performed. By maintaining the transparency of the light transmitting member 27, the brightness of the light emitting device 20 is maintained.

A shielding member 22 is provided at the front portion of the light transmitting member 27. The shielding member 22 is integrally molded of the same material as the translucent member 27. Therefore, the shielding member 22 is also colorless and transparent. The shielding member 22 is provided so as to project downward at a substantially right angle from the front end of the translucent member 27. The shielding member 22 projects from the inner peripheral side (inside) of the front region of the fixed cover 13 toward the inner peripheral side (radial direction) of the cutting tool 12, so that the shielding member 22 extends along the inner peripheral side (inner side) of the fixed cover 13. The flow of cutting powder is obstructed. As a result, the amount of cutting powder blown downward from the front end portion of the fixed cover 13 is reduced, and spraying on the cutting material W and the user is suppressed.

As shown in FIG. 5, the shielding member 22 has a substantially rectangular flat plate shape, and the cutting tool 12 is arranged so as to straddle both the front and back surfaces (left-right direction) in the plate thickness direction. As a result, the flow of the cutting powder is obstructed on both the front and back surfaces of the cutting tool 12, and the blowout is suppressed. The shielding member 22 is arranged on the front end edge of the fixed cover 13.

Further, a recess 22a is provided in the lower part of the shielding member 22. This makes it possible to position the overhanging tip of the shielding member 22 on the inner peripheral side of the cutting edge of the cutting tool 12 (overlapping in side view). However, in FIG. 4, the overhanging tip of the shielding member 22 is shown at a position substantially aligned with the cutting edge of the cutting tool 12. The overhanging tip of the shielding member 22 overlaps both the front and back surfaces of the cutting tool 12 from the cutting edge to the inner peripheral side, so that the shielding function of the cutting powder is further enhanced.

According to the desktop cutting machine 1 configured as described above, the shielding member 22 obstructs the flow of cutting powder flowing on the inner peripheral side of the fixed cover 13. Therefore, the cutting powder blown out from the front end portion of the fixed cover 13 is suppressed. As a result, the scattering of cutting powder from the fixed cover 13 toward the user is reduced, and the dustproof property of the fixed cover 13 is improved.

Further, the shielding member 22 is provided by utilizing the light transmitting member 27 of the light emitting device 20. Therefore, the shielding member 22 is arranged at an appropriate portion without increasing the number of parts. Thereby, the mounting structure of the shielding member 22 can be simplified.

The light transmitting member 27 and the shielding member 22 are connected at an angle. In the illustrated embodiment, the translucent member 27 extends substantially along the tangential direction with respect to the cutting tool 12. The shielding member 22 projects from the end of the translucent member 27 toward the inner peripheral side (generally in the radial direction) of the cutting tool 12. The cutting edge of the cutting tool 12 is efficiently illuminated by the translucent member 27 extending in the tangential direction. The shielding member 22 extending in the radial direction efficiently shields the cutting powder flowing along the cutting edge of the cutting tool 12.

In the light emitting device 20 illustrated as shown in FIG. 7, one light source 21 is arranged on the same surface as the cutting tool 12. As a result, the shadow of the cutting tool 12 is projected as a single line on the upper surface of the cutting material W. Such a line can be used as a positioning line L for aligning the cutting tool 12 with respect to the Sumi line. With this positioning line L, quick and accurate cutting can be realized.

Various changes can be made to the embodiments described above. For example, although the light emitting device 20 using the LED as the light source 21 has been illustrated, it may be replaced with the light emitting device 30 that emits laser light. FIG. 8 shows a light emitting device 30 according to a second embodiment in which a laser light emitting element 31 is used as a light source instead of an LED.

The laser emitting element 31 is supported on the inner surface of the base portion 32 that constitutes the outer shell of the fixed cover 13 as in the first embodiment. The rear side of the base portion 32 is connected to the fixing cover 13 side with one fixing screw 33. Although not shown in the figure, the front side of the base portion 32 is coupled to the fixed cover 13 by concave-convex engagement as in the first embodiment.

The translucent member 34 is located below the laser emitting element 31. The irradiation port 35 is located below the translucent member 34. The irradiation port 35 is provided on the pedestal portion 13a of the translucent member 34. Similar to the first embodiment, the translucent member 34 is fixed along the pedestal portion 13a by abutting one pressing screw 37 as a holding member against the pressing portion 34a.

The translucent member 34 is fixed to the cutting tool 12 substantially along the tangential direction. A shielding member 36 is provided at the front end of the light transmitting member 34. The shielding member 36 is integrally molded with the translucent member 34. The shielding member 36 projects toward the inner peripheral side of the cutting tool 12 at the front end edge of the fixed cover 13.

Similar to the first embodiment, the recess 36a is provided in the lower part of the shielding member 36. The recesses 36a allow the left and right sides of the shielding member 36 to overlap the cutting tool 12. As a result, the shielding function of the cutting powder is further enhanced.

According to the light emitting device 30 according to the second embodiment, since the light source is the laser light emitting element 31 that emits laser light, the irradiation area is narrowed and the positioning line L is irradiated more clearly. As a result, the sumi line alignment work can be performed more quickly and accurately.

According to the first and second embodiments, the translucent members 27 and 34 are abutted and fixed to the pedestal portion 13a of the fixing cover 13 by one set screw 29 and 37. By fixing the light transmitting members 27 and 34, the shielding members 22 and 36 are fixed at a fixed position. As a result, the attachment structure of the shielding members 22 and 36 is simplified, and the maintainability at the time of attachment / detachment is improved.

According to the first and second embodiments, the shielding members 22 and 36 are formed with recesses 22a and 36a into which the outer peripheral end (cutting edge) of the cutting tool 12 enters. Therefore, the shielding members 22 and 36 that overlap the cutting edge of the cutting tool 12 in a side view efficiently shield the flow of cutting powder in a wider range around the cutting edge.

Although the configuration in which the shielding members 22 and 36 are arranged along the front end edge of the fixed cover 13 has been illustrated, the shielding members 22 and 36 may be arranged at positions shifted rearward (inward) by an appropriate distance from the front end edge.

The shielding members 22 and 36 may be separate from the translucent members 27 and 34.

The illustrated shielding members 22 and 36 exemplify the configuration in which the light emitting devices 20 and 30 are arranged using the translucent members 27 and 34, but apart from the light emitting devices 20 and 30, the inner circumference of the front portion of the fixed cover 13 is illustrated. It may be configured to be provided independently on the side.

Although the slide circular saw has been illustrated as a desktop cutting machine, the same can be applied to a desktop cutting machine that does not have a front-back slide function.

W ... Cutting material 1 ... Desktop cutting machine 2 ... Table 2a ... Table upper surface 3 ... Base 3a ... Base upper surface 4 ... Positioning fence 4a ... Base part, 4b ... Sub fence 5 ... Cutting edge plate 6 ... Holder part 7 ... Main body support Arm 7a ... Dust collection duct, 7b ... Dust collection hose, 7c ... Dust collection hose, 7d ... Dust collector (external device)
8 ... Slide bar 8a ... Slide lock device 9 ... Main body slider 9a ... Stopper receiving part, 9b ... Switching plate 10 ... Cutting machine main body 11 ... Electric motor 11a ... Motor housing, 11b ... Controller, 11c ... Controller housing 12 ... Cutting tool C ... Rotation center 13 of the cutting tool 12 ... Fixed cover 13a ... Stand part, 13b ... Engagement receiving part 14 ... Body support part 14a ... Connection port, 14b ... Support hole, 14c ... Hexagon bolt, 14d ... Switching bolt 15 ... Movable cover 16 ... Front handle 17 ... Battery pack 18 ... Carry handle 18a ... Adapter housing 19 ... Dust collection guide 20 ... Light emitting device (first embodiment)
21 ... Light source (LED)
22 ... Shielding member 22a ... Recessed portion 23 ... Base portion 23a ... Protruding portion, 23b ... Engaging portion, 23c ... Cylindrical portion 24 ... Light emitting substrate 25 ... Fixing screw 26 ... Fixing screw L ... Positioning line 27 ... Translucent member 27a ... Holding part 28 ... Light emitting port 29 ... Holding screw (holding member)
30 ... Light emitting device (second embodiment)
31 ... Laser light emitting element 32 ... Base 33 ... Fixing screw 34 ... Translucent member 34a ... Holding part 35 ... Irradiation port 36 ... Shielding member 36a ... Recessed 37 ... Holding screw (holding member)
38 ... Auxiliary table 39 ... Tilt support portion 41 ... First operating member 42 ... Second operating member 42a ... Second engaging rod 43 ... Third operating member 44 ... Adjuster

Claims (10)

It ’s a desktop cutting machine.
A table on which the cutting material is placed and
A cutting machine body whose rear portion is rotatably supported with respect to the table and swings in the vertical direction,
A cutting tool that is rotated by an electric motor provided in the cutting machine body, and
A fixed cover that covers the upper side of the cutting tool and
A desktop cutting machine having a shielding member that projects from the inner peripheral side of the front region of the fixed cover toward the cutting tool and regulates the cutting powder of the cutting material from being blown out from the front region. It ’s a desktop cutting machine.
A table on which the cutting material is placed and
A cutting machine body whose rear portion is rotatably supported with respect to the table and tilts in the vertical direction,
A cutting tool that is rotated by an electric motor provided in the cutting machine body, and
A fixed cover that covers the upper side of the cutting tool and
A light emitting device including a light source that emits light toward the cutting material or the cutting tool on the table.
The light emitting device is a desktop cutting machine having a shielding member that protrudes from the light emitting device in a direction from the inner peripheral side of the fixed cover toward the cutting tool and regulates cutting powder of the cutting material from being blown out from the fixed cover. The desktop cutting machine according to claim 2.
A desktop cutting machine in which the shielding member is arranged in the front area of the fixed cover. The desktop cutting machine according to claim 2 or 3.
The light emitting device is a desktop cutting machine that has a light transmitting member that covers the light source and transmits light emitted by the light source, and the shielding member projects from the light transmitting member. The desktop cutting machine according to claim 4.
A desktop cutting machine in which the translucent member and the shielding member are connected at an angle. The desktop cutting machine according to any one of claims 2 to 5.
A tabletop cutting machine in which the cutting tool is arranged between the cutting material and the light source on the table so that a shadow of the cutting tool is generated on the upper surface of the cutting material when the light source emits light. The desktop cutting machine according to any one of claims 2 to 6.
A desktop cutting machine in which the light source is a light emitting diode. The desktop cutting machine according to any one of claims 2 to 7.
A desktop cutting machine in which the light source is a light emitting element that emits laser light. The desktop cutting machine according to any one of claims 4 to 8.
The light emitting device is a desktop cutting machine having a holding member that holds the translucent member in cooperation with the fixed cover. The desktop cutting machine according to any one of claims 2 to 9.
A desktop cutting machine in which the shielding member is formed with a recess into which the outer peripheral edge of the cutting tool enters.

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