JP6896514B2 - Desktop cutting machine - Google Patents

Description

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

This type of tabletop cutting machine is provided with a table on which the cutting material is placed and a cutting machine body supported at the rear of the table so as to be movable up and down. The cutting machine main body is provided with a circular cutting blade (cutting tool) that rotates by using an electric motor as a drive source. Cutting is performed by cutting the rotating blade that rotates by moving the main body of the cutting machine downward into the cutting material on the table.

In this type of tabletop cutting machine, a device is made to collect dust and the like generated by the cutting process to ensure workability. Patent Document 1 below discloses a technique for collecting cutting powder in a dust box connected to a fixed cover covering a cutting tool. In Patent Document 2, a dust collector is connected to a duct for collecting sawdust attached to the rear of the table, and the cutting powder accumulated on the table and the cutting powder blown up into the saw blade cover from the cutting portion are collected through the duct. The technology for collecting dust is disclosed. In the latter prior art, the rear of the saw blade cover and the duct are connected by a flexible dust hose. This dust collecting hose is piped to the connection port of the duct through a path that is greatly curved upward and backward in order to realize smooth dust collection (wind flow).

Japanese Unexamined Patent Publication No. 2009-226526 Japanese Unexamined Patent Publication No. 6-21605

However, in the latter prior art, the end of the dust collecting hose is connected in a state of being completely fixed to the connection port of the saw blade cover or the connection port of the duct. Therefore, although there is a certain degree of flexibility (flexibility), when the dust collecting hose that curves upward and backward comes into contact with the wall surface or the operator comes into contact with it, an unreasonable external force is applied and the hose bends. As a result, the inside may be blocked and the flow of cutting powder may be obstructed.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent bending of a dust collecting hose and to ensure a smooth flow of cut powder at all times.

The above problems are solved by the following inventions. The first invention is a table on which a cutting material is placed, and a tabletop cutting machine in which the cutting machine main body is swingably provided in the vertical direction with respect to the table. In the first invention, a connection port for connecting a dust collecting hose is provided. In the first invention, the dust collecting hose is connected to the connection port in a state where it can smoothly rotate around its axis.

According to the first invention, the dust collecting hose is connected to the connection port in a state where it can smoothly rotate around its axis. Therefore, when an unreasonable external force is applied to the dust collecting hose, the dust collecting hose rotates around its axis and the unreasonable external force is released, so that the dust collecting hose bends and the inside is closed. This ensures a smooth flow of dust.

In the second invention, in the first invention, the cutting machine main body is provided with a main body side connection port as a connection port. In the second invention, a hose intermediate connecting portion for connecting the dust collecting hose is provided on the side that supports the cutting machine main body so as to be swingable in the vertical direction.

According to the second invention, one end side of the dust collecting hose is connected to the main body side connection port on the main body side of the cutting machine. In addition, a hose intermediate connection portion for connecting the dust collecting hose is provided on the side that supports the cutting machine body so as to be swingable in the vertical direction (main body support side) and on the side that does not move when the cutting machine body swings. Has been done. Therefore, the dust collecting hose connected to the main body side connection port of the cutting machine main body is displaced by the vertical swinging motion of the cutting machine main body, but rotates about the axis with respect to the main body side connection port. As a result, an unreasonable external force is released to prevent bending, which ensures a smooth flow of dust. In the form of connecting the dust collecting hose to the hose intermediate connection part, in addition to connecting the end of the dust collecting hose to the connection port, the middle of the dust collecting hose is smoothly arranged around the axis, for example, in a ring-shaped clip. It includes inserting and holding the hose in a rotatable state, and in any case, the dust collecting hose smoothly rotates around the axis to release an unreasonable external force.

In the third invention, in the second invention, a support side connection port is provided in the hose intermediate connection portion, and the dust collecting hose is connected to the support side connection port in a state where the hose can smoothly rotate around its axis. It is a desktop cutting machine.

According to the third invention, one end side of the dust collecting hose is connected to the main body side connection port of the cutting machine main body, and the other end side is connected to the support side connection port of the hose intermediate connection portion, respectively, around the axis. It is connected so that it can rotate smoothly. Therefore, even when the cutting machine main body swings in the vertical direction or the dust collecting hose is pressed against a wall surface or the like to change the curved handling path, both ends are on the main body side connection port and the support side, respectively. By smoothly rotating around the axis with respect to the connection port, bending is prevented and a smooth flow of dust is ensured.

According to a fourth aspect of the invention, in the third aspect, the support side connection port is communicated with a discharge nozzle for connecting a dust collector as an external device, and the discharge nozzle is provided so that the discharge direction can be changed. It is a desktop cutting machine.

According to the fourth invention, when connecting a connection hose of a dust collector as an external device to the discharge nozzle, for example, the discharge nozzle changes its direction in the vertical direction or the horizontal direction following the connection hose, so that the connection hose is connected. Twisting and bending of the hose are avoided, and this point provides convenience when connecting the connecting hose.

A fifth invention is a desktop cutting machine in which, in the third invention, a discharge nozzle for connecting a dust collector as an external device is branched and provided at a main body side connection port.

According to the fifth invention, a discharge nozzle for connecting a dust collector as an external device via a connecting hose is provided on the cutting machine main body side. The discharge nozzle for connecting the dust collector as an external device may be provided on the main body support side as in the fourth invention, or may be provided on the cutting machine main body side as in the fifth invention. .. According to the fifth invention, since the dust collector is connected to a portion closer to the rotary cutting tool (cutting powder generating portion), the dust collecting efficiency by the dust collector can be improved even when the dust collecting force due to the rotation of the rotary cutting tool is weak. Can be enhanced. In this case, by providing the main body side connection port coaxially with the cutting powder discharge direction which is the tangential direction of the rotary cutting tool, the cutting powder can smoothly flow into the main body side connection port. It is also possible to improve the dust collection efficiency by the dust collector which is made through the discharge nozzle branched from the connection port.

A sixth aspect of the present invention is the desktop cutting machine in which the cutting machine main body is supported so as to be swingable in the vertical direction and slidable in the front-rear direction via a main body support portion in the second to fifth inventions. In the fifth invention, the dust collecting hose is connected to a hose intermediate connection portion provided on the side portion of the main body support portion. In the fifth invention, the length of the dust collecting hose between the main body side connection port and the hose intermediate connection portion is set to a length that allows the sliding operation over the entire slide range of the cutting machine main body set by the main body support portion. Has been done.

According to the sixth invention, the length of the dust collecting hose is set to a length that allows the entire vertical swing range of the cutting machine main body and the entire sliding range in the front-rear direction. The vertical swinging motion and the sliding motion in the front-rear direction are not hindered by the dust collecting hose.

A seventh invention is a table on which a cutting material is placed, and a tabletop cutting machine in which the cutting machine main body is swingably provided in the vertical direction with respect to the table. In the seventh invention, an adapter for performing wireless communication for interlocking the start and stop of an external device used in the cutting process is provided inside the cutting machine main body so as to be removable.

According to the seventh invention, the dustproof property is enhanced by providing the adapter for wireless communication inside the main body of the cutting machine. In addition, since it is removable, it can be easily removed and used for another device, for example, when wireless communication is not performed. In this respect, the adapter and the wireless communication function or the desktop cutting machine are easy to use and general purpose. You can improve your sex. As an external device used incidentally to the cutting process, for example, a dust collector can be applied. By wireless communication via the adapter, for example, the dust collector can be started and stopped in conjunction with the start and stop operations of the desktop cutting machine, whereby the operability and workability of the external device can be improved.

It is an overall perspective view of the desktop cutting machine which concerns on 1st Embodiment. This figure shows a state seen from the diagonally front left side. It is the whole side view which looked at the tabletop cutting machine which concerns on 1st Embodiment from the left side (front side). It is an overall plan view of the tabletop cutting machine which concerns on 1st Embodiment. It is the whole front view which looked at the tabletop cutting machine which concerns on 1st Embodiment from the front side (user side). It is the whole side view which looked at the tabletop cutting machine which concerns on 1st Embodiment from the right side (back side). It is the whole rear view which looked at the tabletop cutting machine which concerns on 1st Embodiment from the rear side. It is a top view of a table and a base. It is a bottom view of a table and a base. It is the bottom view which looked at the rotation lock operation part of a table from the bottom. 9 is a cross-sectional view taken along the line (X)-(X) of FIG. 9, which is a vertical cross-sectional view mainly on the front side of the table. In this figure, the first rotation lock mechanism is mainly shown. 9 is a cross-sectional view taken along the line (XI)-(XI) of FIG. 9, which is a vertical cross-sectional view mainly on the front side of the table. In this figure, the second rotation lock mechanism is mainly shown. FIG. 10 is a cross-sectional view taken along the line (XII)-(XII) of FIG. 10, which is a vertical cross-sectional view of the rotation lock operation unit. It is a right side view of the rear part of a table and the lower part of a main body support part. FIG. 13 is a cross-sectional view taken along the line (XIV)-(XIV) of FIG. 13, which is a vertical cross-sectional view of the right-angle positioning mechanism. In this figure, the inclined receiving portion is shown in a vertical cross section. It is a left side view of the tilt positioning mechanism. In this figure, a state in which the inclined positioning rod is moved to the rear 45 ° positioning position is shown. It is a left side view of the tilt positioning mechanism. In this figure, a state in which the inclined positioning rod is moved to the 48 ° positioning position on the front side is shown. FIG. 15 is a cross-sectional view taken along the line (XVII)-(XVII) of FIG. 15, which is a vertical cross-sectional view of the tilt positioning mechanism. In this figure, the inclined support portion is shown in a vertical cross section. It is a perspective view of the tilt positioning rod alone. It is a vertical cross-sectional view of the tilt fixing mechanism. It is a rear view of the tilt fixing mechanism. FIG. 20 is a cross-sectional view taken along the line (XXI)-(XXI) of FIG. 20, which is a vertical cross-sectional view of the second pulley and its surroundings. It is a top view of the cutting machine main body. This figure shows a state in which the cutting machine main body is swung to the lower moving end. FIG. 22 is a cross-sectional view taken along the line (XXIII)-(XXIII) of FIG. 22, which is a vertical cross-sectional view of the main body of the cutting machine. This figure shows a state in which the cutting machine main body is swung to the lower moving end as viewed from the front side. FIG. 22 is a cross-sectional view taken along the line (XXIV)-(XXIV) of FIG. 22, which is a vertical cross-sectional view of the main body of the cutting machine. This figure shows a state in which the cutting machine main body is swung to the lower moving end as viewed from the front side. It is a cross-sectional view of an electric motor. FIG. 5 is a cross-sectional view taken along the line (XXVI)-(XXVI) of FIG. 5, which is a cross-sectional view of a dust collecting hose connection portion with respect to a main body side connection port. FIG. 5 is a cross-sectional view taken along the line (XXVII)-(XXVII) of FIG. 5, which is a cross-sectional view of the dust collecting hose connection portion with respect to the support side connection port of the relay duct. FIG. 5 is a cross-sectional view taken along the line (XXVIII)-(XXVIII) of FIG. 5, which is a cross-sectional view of the relay duct. It is the whole plan view of the tabletop cutting machine. This figure shows a state in which the auxiliary fence is stored on the pulled-out holder metal fittings. It is a perspective view which looked at the auxiliary fence stored on the holder metal fitting from diagonally below. It is a perspective view which looked at the auxiliary fence from diagonally below. It is the whole perspective view of the desktop cutting machine. This figure shows a state seen from diagonally left front. This figure shows a state in which a vertical vise is attached. It is a figure which shows the modification of the embodiment shown in FIGS. 29 to 32. This figure shows a state in which the auxiliary fence is held flush with the pedestal of the base. It is the whole perspective view of the desktop cutting machine. This figure shows a state in which a vertical vise is supported by an auxiliary fence held flush with the pedestal of the base. It is the whole perspective view of the desktop cutting machine. This figure shows a state in which the cutting machine main body is swung to the lower moving end position. It is a cross-sectional view of the swing lock mechanism. This figure shows the locked state. It is a cross-sectional view of the swing lock mechanism. This figure shows the unlocked state. It is the whole perspective view of the desktop cutting machine. This figure shows a stored state in which the cutting machine main body swung to the lower moving end position is slid to the sliding retracting end position. It is the whole side view which looked at the tabletop cutting machine of 2nd Embodiment from the right side. This figure shows a state in which the cutting machine main body is swung to the lower moving end. Further, in this figure, the rear side of the cutting machine main body is shown in a vertical cross section. It is the whole plan view of the tabletop cutting machine of 2nd Embodiment. It is an overall perspective view of the desktop cutting machine of 2nd Embodiment. This figure shows a state seen from the diagonally front right side. In this figure, the battery pack and the battery mounting portion are not shown.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 41. 1 to 6 show the entire tabletop cutting machine 1 according to the first embodiment. In FIGS. 1 and 2, the user is located on the right side of the desktop cutting machine 1 and performs cutting work. In the following description, the front, back, left, right, up and down directions of the members and configurations will be used with reference to the user. The front side when viewed from the user is the front side (user side).

The tabletop cutting machine 1 is a tabletop cutting machine also called a slide circular saw, and has a table 20 on which the cutting material W is placed, a base 10 for horizontally rotatably supporting the table 20, and a circular cutting tool. The cutting machine main body 100 provided with 102 is provided. Although not visible in FIGS. 1 to 6, the table 20 is supported so as to be horizontally rotatable via a rotation support shaft 21 provided at substantially the center of the upper surface of the base 10. The rotary support shaft 21 is visible below the cutting edge plate 22 in FIG. 7. The cutting edge plate 22 is a strip member having a groove for allowing the cutting tool 102 to escape, and is mounted flush with the upper surface of the table 20. The groove hole of the cutting edge plate 22 is provided long in the radial direction through the rotary support shaft 21 (the center of rotation of the table 20).

On the upper surface side of the table 20, a cutting edge plate 22 and a positioning fence 80 for positioning the cutting material W in the surface direction are provided. A rotation lock operation unit 30 for locking the rotation position is provided on the front portion of the table 20. A cutting machine main body 100 is supported on the rear portion of the table 20 via a main body support portion 60. The main body support portion 60 has a function of supporting the cutting machine main body 100 above the table 20 so that the cutting machine main body 100 can be swung up and down, tilted left and right, and slid back and forth. The cutting tool 102 is cut into the cutting material W placed on the table 20 by swinging the cutting machine main body 100 downward. Further, by sliding the cutting machine main body 100 backward in the cut state of the cutting tool 102, the cutting process of the cutting material W proceeds backward, and the wide cutting material W can be cut.

[Rotation lock mechanism of table 20]
The rotation position of the table 20 with respect to the base 10 can be locked to a constant angle position by selecting and using either the first rotation lock mechanism 31 or the second rotation lock mechanism 32. As shown in FIGS. 7 and 8, the operation units of the first and second rotation lock mechanisms 31 and 32 are arranged in the rotation lock operation unit 30 provided at the front portion of the table 20. Details of the first and second rotation lock mechanisms 31 and 32 are shown in FIGS. 9 and later. The first rotation lock mechanism 31 has a function of locking the table 20 at an arbitrary angle position. The first rotation lock mechanism 31 is locked and unlocked by rotating the operation member 33 arranged in the rotation lock operation unit 30. The second rotation lock mechanism 32 is locked and unlocked by swinging the operation member 34, which is also arranged in the rotation lock operation unit 30, up and down.

As shown in FIGS. 10 and 11, the operating member 33 of the first rotation lock mechanism 31 is attached to the end of the screw shaft portion 35. The screw shaft portion 35 is supported so as to straddle between the two support wall portions 20a and 20b provided on the front portion of the table 20. The screw shaft portion 35 is rotatably supported around the shaft while penetrating the two support wall portions 20a and 20b. The screw shaft portion 35 is inserted into the support hole 20d provided in the support wall portion 20a on the front side so as to be displaceable in the axial direction without rattling in the radial direction. A screw portion 35a is provided at the rear portion of the screw shaft portion 35. The screw portion 35a is tightened into the screw hole 20c provided in the support wall portion 20b on the rear side. Therefore, when the operating member 33 is rotated, the screw shaft portion 35 moves back and forth in the axial direction (front-back direction) due to the screw fitting action of the screw portion 35a on the screw hole 20c. When the operating member 33 is rotated to the lock side, the screw portion 35a is tightened with respect to the screw hole 20c, and the screw shaft portion 35 is displaced to the rear side. On the contrary, when the operating member 33 is rotated to the unlock side, the screw portion 35a is loosened with respect to the screw hole 20c, and the screw shaft portion 35 is displaced to the front side.

A transmission bracket 36 is supported behind the screw shaft portion 35. The transmission bracket 36 is a metal intermediate inclusion that is bent into a crank shape in cross section as shown in the left and right long steel strips, and includes an upper contact portion 36a and a lower contact portion 36b. As shown in FIG. 12, the transmission bracket 36 is movably attached across a pair of left and right pedestals 20e provided on the lower surface of the table 20. The transmission bracket 36 is attached by two fixing screws 37. The transmission bracket 36 is provided with an insertion hole 36c on the right side and an insertion groove hole 36d on the left side. The insertion hole 36c on the right side is formed in a circular hole, and the insertion groove hole 36d on the left side is formed in a long groove hole shape long in the front-rear direction. An annular sleeve member 38 made of iron is attached to the insertion hole 36c on the right side and the insertion groove hole 36d on the left side, respectively. Fixing screws 37 are inserted into the inner peripheral sides of the two sleeve members 38, respectively. The transmission bracket 36 is rotatably supported horizontally about the sleeve member 38 on the right side, and the transmission rod 40 is pushed rearward by this rotational operation.

The rear end of the screw shaft portion 35 is in contact with the front surface of the upper contact portion 36a of the transmission bracket 36. Therefore, when the operating member 33 is rotated in the locking direction as described above, the screw shaft portion 35 is displaced rearward and the transmission bracket 36 is pushed rearward. The transmission bracket 36 moves rearward while rotating around the sleeve member 38 due to the pressing force of the screw shaft portion 35.

The front end of the transmission rod 40 is in contact with the rear surface of the lower contact portion 36b of the transmission bracket 36. The transmission rod 40 is supported so as to be displaceable in the axial direction (front-back direction) via a rod receiving portion 41 provided on the lower surface of the table 20. Further, as shown in FIG. 9, the transmission rod 40 is arranged parallel to the screw shaft portion 35 so as to be displaced to the left side. As the transmission bracket 36 rotates rearward, the transmission rod 40 moves rearward.

As shown in FIG. 10, a lock member 42 is supported behind the transmission rod 40. The lock member 42 is rotatably supported on the lower surface of the table 20 via a support shaft 43. The lock member 42 has an L shape having an input portion 42a extending upward from the support shaft 43 and an output portion 42b in which the support shaft 43 extends forward. The rear end portion of the transmission rod 40 is in contact with the front surface of the input portion 42a. Therefore, when the transmission rod 40 moves backward, the input portion 42a is pushed backward, and as a result, the lock member 42 is in the direction of shifting the input portion 42a backward with respect to the support shaft 43. It rotates in the clockwise direction in FIG. 10). As described above, in the first embodiment, the transmission bracket 36 and the transmission rod 40 function as transmission members for transmitting the screw force generated by the rotation operation of the operation member 33 to the lock member 42.

When the input unit 42a is pushed backward and the lock member 42 rotates to the lock side, the output unit 42b is displaced upward. A locked portion provided on the base 10 side is located above the output portion 42b. In the first embodiment, the lock plate portion 11 is fixed to the base 10 side to form a locked portion. Above the lock plate portion 11, a sandwiching rib 20f provided on the lower surface of the table 20 is located. When the lock member 42 rotates to the lock side, the output portion 42b is displaced upward and the lock plate portion 11 is sandwiched between the output portion 42b and the sandwiching rib 20f.

A screw force is generated by the retracting operation of the screw shaft portion 35 performed by the rotational operation of the operating member 33. This screw force is transmitted to the lock member 42 via the transmission bracket 36 and the transmission rod 40. The output portion 42b of the lock member 42 is displaced upward due to the retracting operation of the screw shaft portion 35, so that the lock plate portion 11 is sandwiched and the rotational position of the table 20 with respect to the base 10 is locked. Since the lock plate portion 11 is sandwiched and locked between the output portion 42b and the sandwiching rib 20f, the table 20 can be locked at an arbitrary angle position within a fixed angle range.

As described above, according to the first rotation lock mechanism 31, the screw shaft portion 35 is configured to indirectly transmit the screw force to the lock member 42 via the transmission bracket 36 as the transmission member and the transmission rod 40. It is configured to be pressed by the transmission bracket 36 at a portion relatively close to the user. On the other hand, as conventionally disclosed in Japanese Patent Application Laid-Open No. 9-131701, in the configuration in which the long screw shaft portion is pressed against the lock member, the displacement (displacement of the pressing position) of the tip of the screw shaft portion with respect to the lock member is caused. As a result, there is a problem that the transmission loss becomes large and the fixing force of the lock member cannot be sufficiently exerted. Since the first rotary lock mechanism 31 illustrated above is configured to press the screw shaft shorter by the amount of the transmission member, the transmission loss of the screw force can be reduced as compared with the conventional case, whereby the lock member 42 of the lock member 42 can be reduced. Sufficient table locking power can be exerted.

Further, according to the first rotation lock mechanism 31, the lock plate portion 11 on the base 10 side is sandwiched vertically to lock the rotation position of the table 20, so that the displacement of the table 20 at the time of locking can be eliminated. it can. In this regard, as disclosed in, for example, JP-A-5-318402, JP-A-9-131701, JP-A-2002-200602, and JP-A-2010-58229, conventionally, the lock member is on the base side. Since the table is unilaterally pressed to lock the rotation position of the table, there is a problem that the table is slightly lifted due to the reaction caused by the pressing of the lock member and the cutting accuracy is impaired. In the first rotary lock mechanism 31 illustrated above, the lock plate portion 11 on the base 10 side is sandwiched and locked by the output portion 42b of the lock member 42 and the sandwiching rib 20f of the table 20 by pressing. As a result of the recoil canceling up and down, the table 20 is not displaced with respect to the base 10 such as floating, and high cutting accuracy can be ensured.

The desktop cutting machine 1 according to the first embodiment includes a second rotation lock mechanism 32 in addition to the first rotation lock mechanism 31. The second rotation lock mechanism 32 can lock the table 20 at a plurality of preset angle positions within a certain angle range (positive lock). The operation member 34 of the second rotation lock mechanism 32 is also arranged in the rotation lock operation unit 30. An operation knob 39 for holding the pushing down position (unlocking position) of the operation member 34 is provided on the left side portion of the rotation lock operation unit 30. As shown in FIGS. 10 and 11, the operating member 34 is supported by the rotation lock operating portion 30 so as to be swingable up and down via a swing shaft portion 34c integrally provided on the rear portion side. An operation unit 34a that the user pushes down is provided on the front portion of the operation member 34.

On the front side of the swing shaft portion 34c, the protrusion portion is linked to the operation member 34 via the engagement shaft 46. In the first embodiment, the lock pin 47 is used as the protrusion. The engaging shaft 46 is a pin having a diameter sufficiently smaller than that of the lock pin 47, and is provided in a state of being inserted in the radial direction through the central axis of the lock pin 47 and protruding in both the left and right directions. The engaging shaft 46 is in contact with the slope portion 34b of the operating member 34 from below. The lock pin 47 is supported so as to be displaceable back and forth via the support wall portion 20a and the rod receiving portion 41. The lock pin 47 is arranged in parallel with the screw shaft portion 35 of the first rotation lock mechanism 31. Further, the lock pin 47 is arranged coaxially with the screw shaft portion 35 when viewed in a plane as shown in FIG. Therefore, the lock pin 47 is arranged in parallel with the transmission rod 40 of the first rotation lock mechanism 31 so as to be displaced in the left-right direction.

The operating member 34 urges the lock pin 47 rearward by a compression spring 48 interposed between the engaging shaft 46 and the support wall portion 20a, and the engaging shaft 46 presses the slope portion 34b from below. It is urged to swing upward (lock side). By pushing down the operating portion 34a against the compression spring 48, the operating member 34 can be swung downward (unlocked side). When the operating member 34 is swung up and down, the lock pin 47 moves back and forth. A plurality of lock recesses 12 are provided behind the lock pin 47 and in a certain angle range at the front portion of the base 10. The plurality of lock recesses 12 are provided at each preset angle.

As shown in FIG. 11, when the operating member 34 is located on the upper lock position side due to the urging force of the compression spring 48, the lock pin 47 is displaced rearward. The rotation position of the table 20 is locked by the lock pin 47 being displaced rearward and entering any of the lock recesses 12. The lock position of the lock pin 47 is held by the urging force of the compression spring 48. When the operating portion 34a of the operating member 34 is pushed downward (unlocked side) against the urging force of the compression spring 48, the engaging shaft 46 is pushed downward by the slope portion 34b, so that the lock pin 47 moves forward. Displace. When the lock pin 47 is displaced forward, the rear portion is pulled out from the lock recess 12. When the lock pin 47 is displaced forward and is pulled out from the lock recess 12, the second rotation lock mechanism 32 is unlocked and the table 20 can be rotated.

The pushing-down operation (unlocking operation) of the operating member 34 can be locked by operating the operation knob 39 provided on the left side. By locking the operating member 34 in the depressed state, the lock pin 47 can be maintained in the state of being detached from the lock recess 12. When the table 20 is positioned at an arbitrary angle position by the first rotation lock mechanism 31 described above, the lock pin 47 is separated from the lock recess 12. Therefore, when positioning the rotation position of the table 20 by the first rotation lock mechanism 31, the operation knob 39 is operated to lock the operation member 34 of the second rotation lock mechanism 32 to the unlock position. By setting the position, the positioning operation by the first rotation lock mechanism 31 can be performed quickly and reliably. When the positioning by the first rotation lock mechanism 31 is not performed, the lock operation of the operation knob 39 is released to release the locked state of the push-down operation of the operation member 34. As a result, the operating member 34 is returned to the upper lock position by the urging force of the compression spring 48. When the operating member 34 is returned to the upper lock position, the lock pin 47 retracts, and the rear end thereof is inserted into the lock recess 12, so that the table 20 is positioned at a predetermined fixed angle position.

As shown in FIG. 7, an angle scale 13 for displaying the rotation position of the table 20 is attached to the front portion of the base 10. Pointer portions 23 are provided at symmetrical positions on the left side and the right side of the table 20, respectively. The angular position of the table 20 can be confirmed by reading the scale of the angle scale 13 pointed by the pointer unit 23. FIG. 7 shows a state in which the table 20 is locked at an angle position of 0 °. In the first embodiment, the rotation position of the table 20 can be changed to the left and right within an angle range of about 60 °. According to the first rotation lock mechanism 31, the table 20 can be locked at an arbitrary angle position in an angle range of about 60 ° to the left and right. According to the second rotation lock mechanism 32, the angular position of the table 20 can be repeatedly and accurately locked at intervals of, for example, 10 ° in an angle range of about 60 ° to the left and right. The angular position that cannot be locked by the second rotation lock mechanism 32 can be locked by the first rotation lock mechanism 31.

[Inclination positioning mechanism 62 of the cutting machine main body 100]
The cutting machine main body 100 is supported on the rear portion of the table 20 via the main body support portion 60. The cutting machine main body 100 can swing up and down and slide back and forth with respect to the upper surface of the table 20, and is supported so as to be tiltable in the left-right direction. The main body support portion 60 includes a main body support arm 61 extending upward from the rear portion of the table 20. A right-angle positioning mechanism 90 and an inclined positioning mechanism 62 are configured between the lower portion of the main body support arm 61 and the rear portion of the table 20.

A cylindrical inclined receiving portion 63 is integrally provided at the rear portion of the table 20. An inclined support portion 64 having a cylindrical mating surface is integrally provided on the lower front surface of the main body support arm 61. As shown in FIG. 17, the inclined support portion 64 is rotatably coupled to the inclined receiving portion 63 via one left and right inclined shaft 65. The left-right tilt axis 65 is shown in FIGS. 2, 19 and 20. The main body support arm 61 and the cutting machine main body 100 are supported so as to be tiltable to the left and right about the axis of the left and right tilting shaft 65. The axis of the left-right inclined shaft 65 coincides with the upper surface of the table 20 in the vertical direction.

Details of the right angle positioning mechanism 90 are shown in FIGS. 13, 14 and 17. The right-angle positioning mechanism 90 includes a right-angle positioning bolt 91, a right-angle positioning release button 68, and a right-angle positioning portion 69. The right-angle positioning bolt 91 is tightened to the upper part of the inclined receiving portion 63. A right-angle positioning portion 69 is arranged in front of the right-angle positioning bolt 91 in the tightening direction. The right-angle positioning portion 69 is supported on the inclined support portion 64 side. The right-angled positioning portion 69 is supported so as to be tiltable up and down via a support shaft 92. The right-angled positioning portion 69 is urged by a torsion spring 92 in a direction (counterclockwise in FIG. 14) to displace the abutting portion 69a provided at the tilting tip portion upward.

As shown in FIG. 17, an engaging portion 69b is provided on the left side portion of the right-angled positioning portion 69. A right-angled positioning release button 68 is arranged on the left side of the engaging portion 69b. The right-angle positioning release button 68 is provided on the left side of the inclined support portion 64. The right-angle positioning release button 68 can be moved back and forth to the left and right. The right-angled positioning release button 68 is urged by the compression spring 94 to the left right-angled positioning position (position shown by the solid line in FIG. 17). When the right-angle positioning release button 68 is positioned at the right-angled positioning position on the left side by the urging force of the compression spring 71, the right-angled positioning portion 69 is positioned at the right-angled positioning position shown by the solid line in FIG. 14 due to the urging force of the torsion spring 93. To do. The main body support arm 61 and thus the cutting machine main body 100 are tilted from the left side to the right side (clockwise in FIG. 14), and the contact portion 69a of the right angle positioning portion 69 located at the right angle positioning position is brought into contact with the right angle positioning bolt 91. As a result, the main body support arm 61 and thus the cutting machine main body 100 are positioned at the right-angled cutting position.

When the right-angled positioning release button 68 is pushed against the compression spring 94 to the right release position (the position indicated by the alternate long and short dash line in FIG. 17), the tip portion abuts on the engaging portion 69b and is pushed to the right. Is done. When the engaging portion 69b is pushed to the right, the right-angled positioning portion 69 moves to the release position shown by the alternate long and short dash line in FIG. When the right-angle positioning release button 68 is maintained and the right-angle positioning portion 69 is positioned at the release position, the right-angle positioning bolt 91 does not abut on the contact portion 69a. Can be tilted to the right after passing through the right-angled cutting position. When the cutting machine main body 100 is tilted to the left from the right-angle cutting position, the contact portion 69a of the right-angle positioning portion 69 is displaced in the direction away from the right-angle positioning bolt 91 to the left, so that the right-angle positioning mechanism 90 is released. No operation is required.

Details of the tilt positioning mechanism 62 are shown in FIGS. 15-18. As shown in FIG. 17, inclined stopper bolts 66 and 67 are provided on both left and right sides of the inclined support portion 64. Both inclined stopper bolts 66 and 67 are tightened with their tip portions obliquely downward. On the other hand, an inclined positioning rod 70 is provided below the inclined receiving portion 63. As shown in FIGS. 15 and 16, the inclined positioning rod 70 is supported by the rear portion of the table 20 so as to be movable in the front-rear direction (axial direction). The inclined positioning rod 70 is urged by a compression spring 71 in a direction of moving to a rearward 45 ° positioning position. The rear portion of the tilt positioning rod 70 is located obliquely downward (forward in the axial direction) to which the left and right tilt stopper bolts 66 and 67 are directed.

An operation bracket 72 is attached to the front portion of the inclined positioning rod 70. FIG. 18 shows the inclined positioning rod 70 and the operation bracket 72 in the state of parts. A pair of left and right operation knobs 72a are integrally provided on the upper part of the operation bracket 72 as a switching operation member for switching the inclination angle. As shown in FIG. 7, the left and right operation knobs 72a are projected upward from the upper surface of the table 20 through the insertion window portion 20g provided at the rear portion of the table 20. The left and right insertion window portions 20g are each formed in a rectangular shape into which an operation knob 72a can be inserted, and are arranged symmetrically with respect to the center line of the table 20. The front-rear width of the left and right insertion window portions 20g is set to a front-rear width that allows the operation knob 72a to be moved between the front 48 ° positioning position and the rear 45 ° positioning position. The user of the desktop cutting machine 1 can move the tilt positioning rod 70 back and forth by pinching the operation knob 72a on the left side or the right side and moving it back and forth.

The initial position of the operation knob 72a is a position displaced rearward by the urging force of the compression spring 71. Therefore, the inclined positioning rod 70 is held at the rear 45 ° positioning position by the urging force of the compression spring 71. FIG. 7 shows the initial position of the operation knob 72a, and FIG. 15 shows the 45 ° positioning position of the inclined positioning rod 70. The operation for moving the inclined positioning rod 70 to the 48 ° positioning position and the operation for moving the operation knob 72a forward is performed against the compression spring 71.

As shown in FIGS. 15 and 16, the rear portion of the inclined positioning rod 70 is provided with a contact portion 70a which is two flat surfaces parallel to each other. By moving the inclined positioning rod 70 back and forth, the contact portion 70a is displaced back and forth. FIG. 15 shows a state in which the inclined positioning rod 70 is positioned at the rear 45 ° positioning position by the urging force of the compression spring 71. In this state, the contact portion 70a is in a state of being detached from the front to the rear in the axial direction of the left and right inclined stopper bolts 66 and 67. Therefore, when the cutting machine main body 100 is tilted to the left or right from the right-angled cutting position and the main body support arm 61 is tilted to the left or right, the left and right tilt stopper bolts 66 and 67 are placed on the outer peripheral surface of the tilt positioning rod 70. Contact. When the left or right tilt stopper bolts 66, 67 abut on the outer peripheral surface of the tilt positioning rod 70, the cutting machine main body 100 is positioned at a position tilted by 45 ° to the left or right.

As shown in FIG. 16, by moving the left or right operation knob 72a to the front side (front side) with the fingertip, the tilt positioning rod 70 is positioned at the front 48 ° position against the urging force of the compression spring 71. Can be moved to. When the inclined positioning rod 70 is moved to the 48 ° positioning position on the front side, the contact portion 70a is positioned in front of the left and right inclined stopper bolts 66 and 67 in the axial direction. Therefore, when the cutting machine main body 100 is tilted to the left or right from the right-angled cutting position and the main body support arm 61 is tilted to the left or right, the left and right tilting stopper bolts 66 and 67 come into contact with the tilting positioning rod 70. It abuts on 70a. When the left or right tilt stopper bolts 66, 67 abut on the contact portion 70a of the tilt positioning rod 70, the cutting machine main body 100 is positioned at a position tilted by 48 ° to the left or right.

As shown in FIG. 17, when the cutting machine main body 100 is tilted to the left, the tilt stopper bolt 66 on the left side is abutted against the tilt positioning rod 70 and is positioned at 45 ° or 48 °. When the cutting machine main body 100 is tilted to the right, the tilt stopper bolt 67 on the right side is brought into contact with the tilt positioning rod 70 and is positioned at 45 ° or 48 °. In this way, the tilt positioning rod 70 for positioning the left-right tilt position of the cutting machine main body 100 at a position tilted at 45 ° or 48 ° is from the outer peripheral edge of the table 20 or the rear end of the virtual circle passing through the outer peripheral edge. By operating the operation knob 72a which is on the front side and is arranged on the user side (front side) of the tilt positioning mechanism 62, it is possible to switch to the 45 ° positioning position or the 48 ° positioning position. Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2011-41999 and Japanese Patent Application Laid-Open No. 2014-138961, this type of switching lever has been arranged on the rear surface side or the side surface of the main body support arm 61. Since the operation knob 72a according to the first embodiment is arranged at a portion closer to the user (rear part of the upper surface of the table 20) as compared with the conventional configuration, the user can take a more comfortable posture. The movement operation of 72a can be performed, and in this respect, the operability of the tabletop cutting machine 1 can be improved. Further, since the operation knobs 72a are arranged on the left and right, the user can easily move and operate the operation knob 72a with either the left hand or the right hand. Further, when tilted to the left, a large space is created near the operation knob 72a on the right side, and conversely, when tilted to the right, a wide space is created near the operation knob 72a on the left side. Therefore, the operation of the operation knob 72a is not hindered when the inclination is left or right.

[Inclination fixing mechanism 50 of cutting machine body 100]
The right-angle cutting position and the left-right tilt position of the cutting machine main body 100 are positioned by the right-angle positioning portion 69 or the tilt positioning rod 70, and then fixed by the tilt fixing mechanism 50 described below. Details of the tilt fixing mechanism 50 are shown in FIGS. 19 to 21. The left-right inclined shaft 65 is integrally provided so as to protrude rearward from the inclined receiving portion 63. The left-right inclined shaft 65 projects rearward from the rear surface of the inclined support portion 64 through the insertion hole 64a. A screw shaft portion 65a is provided at the rear portion of the left-right inclined shaft 65. A first pulley 51 is coupled to the screw shaft portion 65a. When the first pulley 51 is rotated with respect to the screw shaft portion 65a, the first pulley 51 is displaced in the axial direction (front-back direction) thereof. By tightening the first pulley 51 with respect to the screw shaft portion 65a, the first pulley 51 is pressed against the stepped portion 64b of the inclined support portion 64 via the thrust bearing 52 and the flange 53. When the first pulley 51 is tightened to the screw shaft portion 65a and pressed against the step portion 64b, the inclined support portion 64 is fixed to the inclined receiving portion 63, and the left and right inclined positions of the main body support arm 61 are fixed. To. When the tightening of the first pulley 51 with respect to the screw shaft portion 65a is loosened, the inclined support portion 64 becomes rotatable with respect to the inclined receiving portion 63, and the main body support arm 61 can be inclined to the left or right.

As shown in FIG. 20, a second pulley 54 is rotatably supported on the upper part of the main body support arm 61. A transmission belt 55 is bridged between the first pulley 51 and the second pulley 54. A toothed pulley is used for the first pulley 51 and the second pulley 54. Therefore, a toothed belt is used for the transmission belt 55. By engaging the first and second pulleys 51 and 54 with the transmission belt 55, power is reliably transmitted without causing slippage. The idler 56 is rotatably supported in the middle of the transmission path of the main body support arm 61. The idler 56 provides the proper tension for the transmission belt 55. By providing the transmission belt 55 with an appropriate tension by the idler 56, tooth skipping of the first and second pulleys 51 and 54 with respect to the transmission belt 55 is prevented, and reliable power transmission is also performed in this respect as well. ing.

A resin arm cover 57 is attached to the rear surface side of the main body support arm 61. The arm cover 57 is attached so as to cover almost the entire rear surface of the main body support arm 61. The arm cover 57 covers the power transmission path by the first and second pulleys 51, 54 and the transmission belt 55, thereby preventing interference or biting of each of the members 51, 54, 55 with other articles or the like. At the same time, it is protected from dust and the like.

As shown in FIG. 20, a belt pressing portion 57a is provided on the upper side of the main body support arm 61 and on the right side of the second pulley 54. In the case of the first embodiment, the belt pressing portion 57a is integrally provided with the arm cover 57. The belt pressing portion 57a is provided so as to project inward from the wall portion of the arm cover 57. As shown in the figure, the belt pressing portion 57a is pressed against the back surface (opposite surface of the tooth surface) of the transmission belt 55. The belt pressing portion 57a is arranged on the front side of the second pulley 54 in the tightening rotation direction (counterclockwise direction in FIG. 20, clockwise direction when viewed from the user). In FIG. 20, the tightening rotation direction of the first pulley 51 with respect to the screw shaft portion 65a of the left-right inclined shaft 65 is indicated by a white arrow. By rotating the second pulley 54 in the same direction as the white arrow, the left-right tilt position of the main body support arm 61 is fixed with respect to the tilt receiving portion 63, and therefore the left-right tilt position of the cutting machine main body 100 is fixed. Therefore, the transmission belt 55 tends to slacken on the front side (left side of the second pulley 54 in FIG. 20) in the tightening rotation direction of the second pulley 54. The occurrence of this slack is avoided by the belt pressing portion 57a. By avoiding the occurrence of slack in the transmission belt 55, tooth skipping of the transmission belt 55 with respect to the second pulley 54 is prevented, and reliable power transmission is performed.

According to the belt pressing portion 57a, it is possible to prevent the transmission belt 55 from slackening even in a narrow portion where the idler cannot be arranged. By providing the belt pressing portions 57a at a plurality of locations, the slack of the transmission belt 55 can be more reliably avoided. The belt pressing portion 57a can also be provided on the main body support arm 61 side.

As shown in FIGS. 20 and 21, the second pulley 54 is provided with a flange portion 54a. A plurality of engaging recesses 54b are provided on the rear surface of the flange portion 54a. The plurality of engaging recesses 54b are arranged at equal intervals along concentric circles centered on the center of rotation of the second pulley 54. On the other hand, one engaging pin 58 is provided on the upper portion of the arm cover 57 in a state of being urged in the protruding direction by the compression spring 59. The engaging pin 58 urged in the protruding direction by the compression spring 59 is pressed against the engaging recess 54b of the second pulley 54. The engaging pin 58 is elastically pressed against the engaging recess 54b by the compression spring 59, so that the second pulley 54 has a click feeling in the rotational direction.

As shown in FIG. 2, two slide bars 75 and 76 are supported on the upper part of the main body support arm 61. The two slide bars 75 and 76 are fixed so as to extend forward from the upper front surface of the main body support arm 61, and the tip end side thereof reaches the upper center of the table 20. The two slide bars 75 and 76 are supported in parallel with each other at regular intervals in the vertical direction. The front ends of the two slide bars 75 and 76 are connected to each other by a coupling member 78 at regular intervals. The main body slider 77 is slidably supported in the front-rear direction via two upper and lower slide bars 75 and 76. The cutting machine main body 100 is supported by the main body slider 77. The cutting machine main body 100 is supported so as to be slidable back and forth via a main body slider 77 and two upper and lower slide bars 75 and 76.

As shown in FIG. 2, steel pipes (pipe materials) are used for the upper and lower slide bars 75 and 76. A transmission rod 79 is inserted through the inner peripheral side of the upper slide bar 75. The transmission rod 79 is rotatably supported around its axis via a bearing 79a on the rear side and a bearing 79b on the front side. The bearing 79a on the rear side is held by the main body support arm 61. The bearing 79b on the front side is held by the coupling member 78. A second pulley 54 is coupled to the rear portion of the transmission rod 79. The second pulley 54 rotates integrally with the transmission rod 79.

An operation knob 73 is connected to the front portion of the transmission rod 79. By rotating the operation knob 73 clockwise, the second pulley 54 can be rotated in the tightening direction (the tightening direction of the first pulley 51 with respect to the screw shaft portion 65a) via the transmission rod 79. The user can rotate the second pulley 54 while directly receiving a click feeling at regular angles for the rotation operation of the operation knob 73 by the click mechanism arranged in parallel with the second pulley 54. The rotation of the second pulley 54 is transmitted to the first pulley 51 via the transmission belt 55. By rotating the operation knob 73, the first pulley 51 can be rotated to change the left-right tilt position of the main body support arm 61 and thus the cutting machine main body 100, and the cutting machine main body 100 can be fixed.

According to the tilt fixing mechanism 50 described above, the tilt fixing mechanism 50 can be remotely controlled by rotating the operation knob 73. Since the operation knob 73 is located substantially above the center of the table 20, the user can easily rotate the operation knob 73 without reaching out and taking a cramped posture. Further, the second pulley 54 is given a click feeling with respect to rotation by the engaging pin 58 (click mechanism) spring-urged by the compression spring 59. Therefore, the user can rotate the operation knob 73 while receiving a click feeling, and in this respect, the operation of the tilt fixing mechanism 50 is performed as compared with the conventional configuration disclosed in, for example, Japanese Patent Application Laid-Open No. 2015-150633. The sex is enhanced. Further, the belt pressing portion 61a avoids the slack of the transmission belt 55 on the front side in the tightening rotation direction of the second pulley 54, and the tooth skipping of the transmission belt 55 with respect to the second pulley 54 is avoided.

[Cutting machine body 100]
The cutting machine main body 100 is slidably supported back and forth via two slide bars 75 and 76 of the main body support portion 60. Details of the cutting machine main body 100 are shown in FIGS. 22 to 25. The cutting machine main body 100 includes a circular cutting tool 102 that rotates by using an AC power supply type electric motor 101 as a drive source. The range of the upper half circumference of the cutting tool 102 is covered with the fixed cover 103. The area of the lower half circumference of the cutting tool 102 is covered with the movable cover 104. As shown in FIG. 23, the movable cover 104 is rotatably supported (openable and closable up and down) on the left side surface of the fixed cover 103 via a bearing (ball bearing) 109 attached to the outer peripheral side of the boss portion 104a. The movable cover 104 is opened and closed in conjunction with the vertical movement of the cutting machine main body 100. When the movable cover 104 is opened, the lower portion of the cutting tool 102 is exposed. This exposed portion is cut into the cutting material W. The movable cover 104 is fully closed with the cutting machine main body 100 located at the top dead center (states shown in FIGS. 1 to 5). The movable cover 104 is gradually opened when the cutting machine main body 100 is moved downward from the top dead center. The movable cover 104 is fully opened in a state in which the cutting machine main body 100 is moved downward to the bottom dead center (state shown in FIG. 22).

As shown in FIG. 5, a base portion 107 is integrally provided at the rear portion of the fixed cover 103. The base portion 107 extends rearward. On the other hand, a bifurcated main body support portion 77a is provided on the right side portion of the main body slider 77. The rear portion of the base portion 107 is inserted into the main body support portion 77a and is coupled to the main body slider 77 in a state where it can swing up and down via the vertical swing support shaft 105. It is supported so that it can swing up and down. The cutting machine main body 100 can be swung up and down about the vertical swing support shaft 105. The cutting machine main body 100 is urged in a direction of being returned to the upper standby position by a torsion spring 106 (a part thereof can be seen in FIG. 4) mounted around the vertical swing support shaft 105.

As shown in FIGS. 23 and 25, the electric motor 101 has a structure in which a stator 111 and a rotor 112 are housed in a cylindrical motor housing 110. A stator 111 is fixed to the inner peripheral side of the motor housing 110. The rotor 112 is rotatably supported on the inner peripheral side of the stator 111. The rotor 112 is coupled to the motor shaft 113. The motor shaft 113 is rotatably supported via bearings 114 and 115 in the front-rear direction of the motor axis J direction. A cooling fan 116 is attached to the motor shaft 113 on the front side (lower left) of the rotor 112 in the motor axis direction. A commutator 112a is provided at the rear portion (upper right) of the rotor 112 in the J direction of the motor axis. Two carbon brushes 117 are slidably contacted with the commutator 112a from opposite sides.

As shown in FIG. 22, a plurality of intake ports 110a are provided on the rear surface of the motor housing 110 in the motor axis J direction. When the electric motor 101 is activated and the cooling fan 116 is rotated, outside air is introduced into the motor housing 110 via the intake port 110a. The outside air (cooling air) introduced from the intake port 110a flows forward in the J direction of the motor axis to cool the stator 111, rotor 112, and the like.

The electric motor 101 is mounted in an inclined posture in a direction in which the rear side in the J direction of the motor axis is displaced upward. As shown in FIG. 23, in a state where the cutting machine main body 100 is positioned at a right-angled cutting position where the cutting tool 102 is orthogonal to the upper surface of the table 20, the electric motor 101 directs its motor axis J to the upper surface of the table 20. It is arranged in an inclined posture rather than parallel. By arranging the electric motor 101 at an angle, it is possible to set a larger allowable inclination angle to the right side of the cutting machine main body 100.

The electric motor 101 is coupled to the back surface side (right side portion) of the fixed cover 103 via the gear head portion 120. The gear head portion 120 has a configuration in which a two-stage reduction gear train is built in the gear housing 121. The gear housing 121 is integrally provided on the back surface side of the fixed cover 103. An output gear portion 113a is provided at the tip of the motor shaft 113 of the electric motor 101. The output gear portion 113a is meshed with the first driven gear 122. The first driven gear 122 is fixed on the first driven shaft 123. A second driven gear 124 is fixed on the first driven shaft 123 on the left side of the first driven gear 122. The first driven shaft 123 is rotatably supported by the gear housing 121 via bearings 123a and 123b.

The second driven gear 124 is meshed with the third driven gear 125. The third driven gear 125 is fixed on the second driven shaft 126. The second driven shaft 126 is rotatably supported by the gear housing 121 via bearings 126a and 126b. The second driven shaft 126 is arranged parallel to the first driven shaft 123. The third driven gear 125 is meshed with the fourth driven gear 127. The fourth driven gear 127 is fixed on the spindle 130. The spindle 130 is rotatably supported under the gear housing 121 via bearings 130a and 130b. The spindle 130 is arranged in parallel with the first and second driven shafts 123 and 126.

The spindle 130 projects into the fixed cover 103. A cutting tool 102 is attached to this protruding portion. The cutting tool 102 is attached by tightening the cutting tool fixing screw 134 with its center sandwiched between the outer flange 131 and the inner flange 132.

A controller accommodating portion 140 is provided on the upper surface of the electric motor 101. The controller accommodating unit 140 mainly accommodates the controller 141 for controlling the operation of the electric motor 101. The controller 141 controls, for example, constant rotation control and soft start. A part of the outside air (motor cooling air) that has flowed into the motor housing 110 due to the rotation of the cooling fan 116 flows into the controller housing unit 140. The controller 141 is cooled by a part of the motor cooling air that has flowed into the controller housing unit 140. As shown in FIGS. 5, 6, 22 and 23, an exhaust port 145 for exhausting the motor cooling air is provided on the rear side of the gear head portion 120.

A handle portion 150 gripped by the user is provided on the side portion on the front side of the electric motor 101 when viewed from the user. The handle portion 150 is arranged substantially parallel to the rotation axis of the cutting tool 102 (the axis of the spindle 130) to form a lateral grip type handle portion. The left and right sides of the handle portion 150 are coupled to the front side portion of the electric motor 101 via the legs 151 and 151. A switch lever 152 is arranged on the rear surface of the handle portion 150. By grasping the handle portion 150 and manually pulling the switch lever 152 toward you, the electric motor 101 is activated and the cutting tool 102 is rotated. A lock-off switch 153 is provided on the front surface of the handle portion 150. The switch lever 152 can be pulled (on) while the lock-off switch 153 is pushed in.

As shown in FIG. 5, a carrying handle 154 for carrying is provided at the rear portion of the fixed cover 103. The carrying handle 154 extends from the upper rear surface of the fixed cover 103 to the rear portion of the base portion 107. The carrying handle 154 is provided so as to extend in a substantially horizontal direction in a state where the cutting machine main body 100 is locked near the bottom dead center by a swing lock mechanism 210 described later. By locking the cutting machine main body 100 near the bottom dead center and grasping the carrying handle 154 when carrying the desktop cutting machine 1, the desktop cutting machine 1 can be held in a balanced posture without tilting back and forth and left and right. It can be carried easily.

[Dust collection hose]
As shown in FIGS. 1 and 2, an arrow 103a indicating the rotation direction of the cutting tool 102 is displayed on the left side (front side) of the fixed cover 103. The cutting tool 102 rotates clockwise when viewed from the left side. Therefore, the cutting powder generated by the cutting process is blown up from the upper surface of the cutting material W on the rear side of the fixed cover 103. A dust guide 160 for receiving the blown-up cutting powder is attached to the lower surface of the rear portion of the base portion 107. Further, a main body side connection port 161 for connecting a dust collecting hose is provided on the rear portion of the carrying handle 154 and the upper surface of the rear portion of the base portion 107. The main body side connection port 161 has a sleeve shape, and the inner side thereof communicates with the dust guide 160 via the inside of the base portion 107. The dust received by the dust guide 160 is blown up to the inside of the main body side connection port 161 through the inside of the base portion 107. A dust collecting hose 162 is connected to the main body side connection port 161 via a connecting member 163. The connection structure of the dust collecting hose 162 and the connecting member 163 to the main body side connecting port 161 is shown in FIG.

The dust collecting hose 162 is a bellows-shaped flexible hose having appropriate elasticity and flexibility, and is connected to a relay duct 170 as a hose intermediate connection provided on the right side of the main body support portion 60. As shown in FIG. 5, the dust collecting hose 162 is connected between the main body side connection port 161 and the relay duct 170, for example, via a routing path that is greatly curved upward. The length of the dust collecting hose 162 between the main body side connection port 161 and the relay duct 170 (in the first embodiment, the total length of the dust collecting hose 162) is the total swing range in the vertical direction of the cutting machine main body 100 and the front and rear. The length is set to allow movement in the entire slide range in the direction. The connection structure of the dust collecting hose 162 to the main body side connection port 161 is shown in FIG. 26, and the connection structure to the relay duct 170 is shown in FIG. 27. As shown in FIG. 26, a cylindrical connecting member 163 is attached to the upstream end of the dust collecting hose 162. The upstream end of the dust collecting hose 162 is connected to the inner peripheral side of the connecting member 163. A groove portion 163a having a constant width is provided on the outer peripheral surface of the connecting member 163 over the entire circumference.

The holding member 164, to which the holding member 164 is mounted on the inner peripheral side of the main body side connection port 161, is a resin-made interposition component having an annular shape and has elasticity in the diameter-expanding direction. An engaging convex portion 164a is integrally provided at a position where the outer peripheral surface of the holding member 164 is bisected in the circumferential direction. The two engaging protrusions 164a are fitted into the engaging holes 161a provided at the circumferentially bisected positions of the main body side connection port 161. By fitting the two engaging protrusions 164a into the engaging holes 161a, the holding member 164 is held along the inner peripheral surface of the main body side connection port 161 in a state where the holding member 164 is not displaced around the axis H and in the axis H direction. Has been done.

Since the ring-shaped holding member 164 held along the inner peripheral surface of the main body side connecting port 161 is fitted into the groove portion 163a of the connecting member 163 as shown in the figure, the dust collecting hose 162 is rotated around its axis H. It is connected to the main body side connection port 161 in a rotatable state. The connecting member 163 can be pulled out from the inner peripheral side of the main body side connecting port 161 by pushing the two engaging convex portions 164a into the inner portion of the engaging hole 161a and elastically deforming the holding member 164 in the radial direction. As a result, the dust collecting hose 162 can be easily removed from the main body side connection port 161.

As shown in FIG. 27, a similar connecting member 165 is attached to the downstream end of the dust collecting hose 162. The downstream end of the dust collection hose 162 is connected to the support side connection port 171 of the relay duct 170 via the connection member 165. Grooves 165a are also provided on the outer peripheral surface of the connecting member 165 over the entire circumference. An annular holding member 172 is also held on the inner peripheral side of the support side connection port 171. An engaging convex portion 172a is integrally formed at a position where the outer peripheral surface of the holding member 172 is bisected. The two engaging convex portions 172a are fitted into the engaging holes 171a provided at the circumferentially bisected positions of the support side connection port 171, and the holding member 172 is positioned around the axis H and in the axis H direction. It is held along the inner peripheral surface of the support side connection port 171 in a state where it does not shift. Therefore, the dust collecting hose 162 is connected to the support side connection port 171 so as to be smoothly rotatable around the axis H of the support side connection port 171 even with a small external force on the downstream side as well as the upstream side.

As shown in FIG. 28, the relay duct 170 includes a base portion 173 integrally provided with the main body support arm 61 of the main body support portion 60. A large dust collecting duct 174 is attached to the front portion of the base portion 173. The dust collecting duct 174 is directed to the rear of the positioning fence 80. The cutting powder blown up behind the positioning fence 80 is collected by the dust collecting duct 174. A discharge nozzle 176 is connected to the right side portion of the base portion 173 via a joint 175. As shown in FIG. 5, the above-mentioned support side connection port 171 is provided on the upper portion of the base portion 173 in a state of being slightly inclined rearward.

As shown in FIG. 28, the dust collecting duct 174 and the support side connection port 171 communicate with the discharge nozzle 176 via the internal passage 173a of the base portion 173. The discharge nozzle 176 is supported so as to be rotatable (swingable) up and down via a joint 175. A hose of a dust collector prepared separately is connected to the discharge nozzle 176.

The upstream side (front side) of the dust collecting hose 162 is rotatably connected to the main body side connection port 161 around its axis H, and the downstream side (rear side) is connected to the support side connection port 171 around its axis H. It is connected to the hose in a rotatable state. According to the connection structure, for example, when the cutting machine main body 100 is swung in the vertical direction and the routing path is changed by the sliding operation in the front-rear direction, both upper and lower ends rotate around the axis H. Since no excessive bending or twisting (narrowing of the cross-sectional area) occurs in the middle of the path of the dust collecting hose 162, a smoothly curved handling path is maintained, whereby the original cross-sectional area is maintained over the entire path. It is secured and high dust collection efficiency can be reliably maintained.

In this respect, for example, as disclosed in Japanese Patent Application Laid-Open No. 6-21605, when the end of the dust collecting hose is connected to the connection port in a state of being fixed around the axis thereof, the routing route is changed. In this case, excessive bending or twisting occurs in the middle of the handling path, and a dust collecting passage having a sufficient cross-sectional area cannot be secured. According to the connection structure (rotary connection structure) of the dust collecting hose 162 illustrated above, the problem is solved. Regarding this point, for example, when the desktop cutting machine 1 is installed and stored with the wall surface of the building as the back, even if the dust collecting hose 162 interferes with the wall surface, both ends rotate around the axis H and the handling thereof. The path is smoothly followed along the wall surface, thereby avoiding deformation or damage of the dust collecting hose 162 and increasing its durability.

Instead of the holding members 164 and 172, the upstream end and the downstream end of the dust collecting hose 162 may be rotatably connected around the axis H by interposing a rolling bearing such as a ball bearing or a needle bearing. Good. It is also possible to remove the main body side connection port 161 and attach a dust bag or a dust box to the removed tubular portion instead of the dust collecting hose 162.

[Storage structure of auxiliary fence 82]
As shown in FIGS. 1 to 5, a positioning fence 80 for positioning the cutting material W in the surface direction is provided on the upper surface side of the table 20. The front surface (positioning surface 80a) of the positioning fence 80 coincides with the rotation center of the table 20 (the axis of the rotation support shaft 21). The cutting material W is positioned with respect to the upper surface (table surface direction) of the table 20 by bringing the rear surface of the cutting material W into contact with the positioning surface 80a of the positioning fence 80 and aligning the cutting material W to the left and right.

The positioning fence 80 has an upper and lower two-stage structure having a pair of left and right base portions 81 and a pair of left and right auxiliary fences 82 with respect to the cutting tool 102. The pair of left and right base portions 81 are integrally connected to the left and right via a semicircular connecting portion 83 on the rear surface side. The left and right sides of the base 10 project laterally from below the table 20. The left and right overhanging portions 14 are provided with pedestal portions 14a that bulge upward. A base portion 81 is supported along the upper surface of the table 20 so as to straddle the left and right pedestal portions 14a. FIG. 7 shows a state in which the positioning fence 80 is removed. Two auxiliary pedestal portions 14b are provided below the table 20 and on the upper surface of the base 10. In FIG. 7, two auxiliary pedestals 14b are visible through the arc-shaped insertion grooves 24 provided in the table 20. The base portion 81 is also supported along the upper surface of the table 20 by a support pillar (not shown) attached to the auxiliary pedestal portion 14b.

The left and right auxiliary fences 82 are supported flush with each other (with the positioning surface 80a exactly aligned) on the upper side of the base portion 81. By further attaching auxiliary fences 82 to the upper side of the left and right base portions 81 to increase the height of the positioning surface 80a, the cutting material W having a large height dimension can be positioned with higher accuracy, and the cutting material can be positioned with higher accuracy. The cutting process can be performed with W leaning diagonally between the upper surface of the table 20 and the positioning surface 80a. The left and right auxiliary fences 82 can be removed from the base portion 81, respectively. By removing the auxiliary fence 82, the cutting machine main body 100 can be tilted to the left or right at a larger angle. FIG. 29 shows a state in which the left and right auxiliary fences 82 are removed from the base portion 81. The left and right auxiliary fences 82 removed as shown in the figure can be stored on the holder metal fittings 15, respectively. The left and right holder metal fittings 15 are frame members manufactured by bending steel bars into a U shape, respectively, and are slidably supported by the overhanging portion 14 of the base 10 as shown in FIG. FIG. 8 shows a state in which the left and right holder metal fittings 15 are housed. As shown in FIG. 29, the left and right holder metal fittings 15 can be pulled out sideways, and the auxiliary fence 82 can be placed and stored on the upper surface side thereof.

As shown in FIG. 31, the auxiliary fence 82 is provided with a positioning pin portion 82a and a clip portion 82b. The positioning pin portion 82a is inserted into the positioning hole 81a provided in the base portion 81 when the auxiliary fence 82 is mounted flush with respect to the base portion 81. The clip portion 82b is used when it is removed from the base portion 81 and stored on the holder metal fitting 15. As shown in FIG. 30, the clip portion 82b elastically holds a part of the holder metal fitting 15, and the auxiliary fence 82 is held on the holder metal fitting 15. FIG. 30 shows a state in which the front support portion 15a of the holder metal fitting 15 is held by the clip portion 82b to store the auxiliary fence 82, but the auxiliary fence 82 is inverted back and forth and the clip portion 82b is behind the holder metal fitting 15. The support portion 15b can also be held and stored.

For example, as disclosed in Japanese Patent Application Laid-Open No. 2010-2800013, the portion accommodating the removed auxiliary fence in this type of tabletop cutting machine has not been particularly considered in the past. For this reason, it takes time to find the removed auxiliary fence, or if it is lost, the cutting material must be positioned with the low positioning surface, and as a result, the cutting accuracy may be deteriorated and the workability may be impaired. there were. According to the auxiliary fence storage structure illustrated above, since it can be stored on the left and right sides of the base 10, it does not take time to find it when necessary and there is no risk of it being lost, which causes a decrease in workability. There is no.

As shown in FIG. 32, a vertical vise 180 for fixing the cutting material W can be attached to the left and right overhanging portions 14 of the base 10. With the vertical vise 180, the cutting material W can be pressed from above against the upper surface of the table 20 to be sandwiched and fixed in the plate thickness direction. The vertical vise 180 is provided on the first column 181 and the first arm portion 182 connected to the upper part of the first column 181, the second column 183 supported on the tip of the first arm portion 182, and the lower part of the second column 183. It includes a combined second arm portion 184 and a screw shaft 185 supported at the tip of the second arm portion 184. The first support column 181 is inserted into and removed from the support hole 14c provided on the rear side of the pedestal portion 14a without rattling. The first support column 181 is fixed in the inserted state into the support hole 14c by tightening a fixing screw (not visible in FIG. 32) provided at the rear portion of the pedestal portion 14a. The first arm portion 182 is rotatably supported around the first support column 181. The second support column 183 is supported on the rotation tip side of the first arm portion 182 in a state where the position can be adjusted up and down. The second arm portion 184 is rotatably supported around the second support column 183. The screw shaft 185 is tightened to the rotation tip side of the second arm portion 184. A knob 187 that the user grips during the tightening operation is provided at the upper end of the screw shaft 185. A circular pressing plate 186 pressed against the upper surface of the cutting material W is supported at the lower end of the screw shaft 185.

With the pressing plate 186 in contact with the upper surface of the cutting material W placed on the table 20, the screw shaft 185 is rotated in the tightening direction to bring the pressing plate 186 to the upper surface of the cutting material W by screw force. The cutting material W can be fixed on the table 20 by pressing against the table 20. In the state shown in FIG. 32, the left and right auxiliary fences 82 are supported on the upper surface side of the base portion 81, respectively, to form a high positioning surface 80a. The vertical vise 180 is supported so as to straddle the positioning fence 80 from the rear side to the front side. In this way, the vertical vise 180 can be supported by using the support hole 14c of the pedestal portion 14a, or can be supported by using the auxiliary fence 82 that has been removed and stored in the pedestal portion 14a.

As shown in FIG. 33, the auxiliary fence 82 removed from the base portion 81 is held in a state in which the positioning pin portion 82a is inserted into the holding hole 14d provided on the side portion of the pedestal portion 14a and is projected laterally. can do. The inserted state of the positioning pin portion 82a into the holding hole 14d is locked by tightening the fixing screw 16. The rear portion 82c of the auxiliary fence 82 is placed and held on the upper surface of the overhanging portion 14. In this way, the auxiliary fence 82 holds the positioning surface 80a flush with the upper surface of the table 20, so that the cutting material W having a large left-right width can be placed on the table 20 more stably. As a result, the cutting material W having a large left-right width can be cut with high accuracy.

As shown in FIG. 34, the vertical vise 180 can be supported by using the auxiliary fence 82 held in this way. Although FIG. 34 shows a state in which the vertical vise 180 is supported only on the left side, the vertical vise 180 can also be supported on the right side by using the auxiliary fence 82 held by the pedestal portion 14a on the right side. The auxiliary fence 82 is provided with a support hole 82d. The vertical vise 180 can be supported by inserting the first support column 181 into the support hole 82d. Although not visible in the figure, a fixing screw is provided on the rear side of the support hole 82d. By tightening the fixing screw, the first support column 181 is fixed in a state of being inserted into the support hole 82d. By supporting the vertical vise 180 by using the support hole 82d of the auxiliary fence 82, the vertical vise 180 can be held at a position shifted to the left or right from the pedestal portion 14a, so that the width is wider. The large cutting material W can be fixed in a larger span in the left-right direction, and therefore the cutting material W having a larger left-right width can be fixed more reliably.

[Lower limit position switching mechanism 200]
Next, the desktop cutting machine 1 according to the first embodiment includes a lower limit position switching mechanism 200, a swing lock mechanism 210, a slide intermediate stopper mechanism 220, and a slide rear end position lock mechanism 230. The lower limit position switching mechanism 200 is a mechanism for switching the lower limit position of the vertical swing range of the cutting machine main body 100, and has a function of adjusting or switching the cutting depth of the cutting tool 102 with respect to the cutting material W. As shown in FIGS. 22, 29, 32, and 35, a stopper cradle is integrally provided below the main body slider 77. A stopper plate 201 is provided on the upper surface of the stopper cradle so that the position can be changed in the left-right direction. The stopper plate 201 is provided with a knob portion 201a. The user can pinch the knob portion 201a and move the stopper plate 201 in the horizontal direction (left-right direction) between the first position on the right side and the second position on the left side. In the state of being positioned at the first position on the right side, the elongated relief hole 201b provided in the stopper plate 201 and the insertion hole (not visible in the figure) provided vertically penetrating the stopper cradle overlap. When the stopper plate 201 is moved to the second position on the left side, the relief hole 201b is displaced to the left side with respect to the insertion hole of the stopper cradle, and as a result, the insertion hole of the stopper cradle is closed by the stopper plate 201.

A stopper support portion 202 is integrally provided on the left side portion of the base portion 107 of the cutting machine main body 100 so as to project laterally. Two front and rear stopper screws 203 and 204 are tightened to the stopper support portion 202. A knob 204a that the user grips when performing a tightening operation is provided on the upper portion of the second stopper screw 204 on the rear side. The lower side of the two stopper screws 203 and 204 protrudes downward from the lower surface of the stopper support portion 202. The rear stopper screw 204 extends further downward than the front stopper screw 203. By rotating the two stopper screws 203 and 204, respectively, the protrusion dimension from the lower surface of the stopper support portion 202 can be adjusted. As shown in FIG. 35, when the cutting machine main body 100 is moved downward, in the state where the stopper plate 201 is positioned at the first position on the right side, the relief holes 201b and the insertion holes on the rear side are the second ones on the rear side. The stopper screw 204 enters and is released (missing). In this case, the first stopper screw 203 on the front side is abutted against the stopper plate 201 to regulate the lower moving end position of the cutting machine main body 100.

Although not shown in the figure, when the cutting machine main body 100 is moved downward while the stopper plate 201 is moved to the second position, the relief hole 201b is displaced to the left with respect to the insertion hole. Therefore, the second stopper screw 204 on the rear side extending further downward is abutted against the stopper plate 201, and the position of the lower moving end of the cutting machine main body 100 is regulated. In this way, according to the lower limit position switching mechanism 200, the stopper plate 201 is positioned at the first position on the right side and the relief hole 201b and the insertion hole are overlapped with each other, and the stopper plate 201 is positioned at the second position on the left side and the relief hole 201b. By switching to a state in which the screw is displaced with respect to the insertion hole, it is possible to switch between a state in which the first stopper screw 203 is in contact with the stopper plate 201 and a state in which the second stopper screw 204 is in contact with the stopper plate 201. As a result, the lower moving end position of the cutting machine main body 100 can be switched between two upper and lower positions. The lower moving end position of the cutting machine main body 100 regulated by the first stopper screw 203 is set to the lowest lowering end position set by the positional relationship between the cutting tool 102 and the cutting edge plate 22. For example, grooving can be performed quickly by the lower moving end position above the lowest descending end position regulated by the first stopper screw 203 and regulated by the second stopper screw 204. .. The lower moving end positions of the two upper and lower positions can be individually adjusted by rotating the first stopper screw 203 and the second stopper screw 204 to adjust the tightening amount with respect to the stopper support portion 202.

[Swing lock mechanism 210]
The lower moving end position of the cutting machine main body 100 is regulated by the first and second stopper screws 203 and 204, and is also regulated by the swing lock mechanism 210. The rocking lock mechanism 210 can rock the cutting machine main body 100 downward as shown in FIG. 35 to lock it at the lock position. Details of the swing lock mechanism 210 are shown in FIGS. 36 and 37. The swing lock mechanism 210 is provided on the main body support portion 77a of the main body slider 77. A support cylinder portion 77b is provided at the tip of the main body support portion 77a. A lock pin 211 is supported on the inner peripheral side of the support cylinder portion 77b so as to be rotatable around its axis and movable in the left-right direction. The lock pin 211 is urged in a direction of moving to the left (lock side) by a compression spring 212 interposed between the lock pin 211 and the support cylinder portion 77b. A knob 213 that the user picks during operation is attached to the right end (head) of the lock pin 211. An engaging convex portion 213a is provided along the radial direction at the left end portion of the knob 213.

At the left end of the support cylinder portion 77b, a shallow engaging groove 77c and a deep engaging groove 77d are provided in a cross shape orthogonal to each other. When the knob 213 is rotated to insert the engaging convex portion 213a into the shallow engaging groove 77c as shown in FIG. 37, the lock pin 211 is held at the unlocked position displaced to the right. The lock pin 211 can be moved to the left lock position by rotating the knob 213 by about 90 ° from this unlock position and inserting the engaging protrusion 213a into the deep engaging groove 77d.

A lock hole 108 is provided on the right side of the base portion 107 of the cutting machine main body 100. The lock hole 108 is also shown in FIG. When the lock pin 211 is moved to the left lock position while the cutting machine main body 100 is moved downward to the lower lock position, the tip end portion thereof is inserted into the lock hole 108. By inserting the lock pin 211 into the lock hole 108, the cutting machine main body 100 is locked at the lower lock position. As described above, when the cutting machine main body 100 is locked at the locked position, the carrying handle 154 is positioned substantially horizontally. As shown in FIG. 38, the cutting machine main body 100 is locked to the lower lock position by the swing lock mechanism 210, and the cutting machine main body 100 is locked to the slide rear end position by the slide rear end position lock mechanism 230 described later. The user can easily carry the desktop cutting machine 1 in a well-balanced manner by grasping the carrying handle 154.

[Slide intermediate stopper mechanism 220]
As shown in FIGS. 3, 5, 32 to 34, the slide intermediate stopper mechanism 220 is provided on the upper right side of the main body support portion 60. The slide intermediate stopper mechanism 220 has a configuration in which the stopper plate 221 is rotatably supported back and forth via the support shaft 222. A stopper portion 221a projecting to the left is provided on the side portion of the stopper plate 221 by bending. The stopper plate 221 is rotated forward about the support shaft 222 from the retracted position (the position shown in the drawing) along the right side of the main body support portion 60 as shown by the white arrow in FIG. It can be moved to a stopper position (not shown in the figure) that overhangs the slide bar 75 to the side. When the stopper plate 221 is moved to the stopper position, the stopper portion 221a is in a state of entering the moving path of the main body slider 77. Therefore, when the cutting machine main body 100 is slid backward while the stopper plate 221 is moved to the stopper position, the rear end surface of the main body slider 77 comes into contact with the stopper portion 221a, and the sliding operation further backward is performed. Be regulated.

When the stopper plate 221 is positioned in the retracted position, the main body slider 77 can slide to a position (entire slide range) in which the rear end surface is in contact with the front surface of the main body support portion 60. By moving the stopper plate 221 to the stopper position on the front side, the retracted end position of the entire slide range can be displaced to the front side by the length of the stopper portion 221a. By restricting the position of the slide retracting end by the slide intermediate stopper mechanism 220, for example, when the cutting material W called the crown mold material is diagonally leaned against the positioning fence 80 to perform the cutting work, the attachment portion of the cutting tool 102 is performed. The sliding operation of the cutting machine main body 100 can be regulated before the outer flange 131, the inner flange 132, and the head of the cutting tool fixing screw 134 interfere with the cutting material W, thereby preventing the cutting material W from being damaged. It can be avoided.

[Slide rear end position lock mechanism 230]
The cutting machine main body 100 can be locked at the retracted end position (slide rear end position) of the entire slide range by the slide rear end position locking mechanism 230. The slide rear end position lock mechanism 230 is provided on the upper left side portion of the main body support portion 60. The slide rear end position lock mechanism 230 includes a lock pin 231 with a spring-loaded knob 231a on the lock side similar to the swing lock mechanism 210 described above. A relief recess 77e for releasing the slide rear end position lock mechanism 230 is provided at the rear portion of the left side portion of the main body slider 77. As shown in FIG. 2, a lock hole 77f is provided at the bottom of the relief recess 77e. As shown in FIG. 38, the cutting machine main body 100 is locked to the lower lock position by the above-mentioned swing lock mechanism 210, slid to the slide retracting end position, and the lock pin 231 is inserted into the lock hole 77f to insert the main body slider. 77 As a result, the cutting machine main body 100 is locked at the slide retracting end position. The lock pin 231 can be held in the unlocked position by pinching the knob 231a, moving the lock pin 231 to the unlocked position against the spring force, and rotating the lock pin 231 by about 90 °. By holding the lock pin 231 in the unlocked position, the main body slider 77 and thus the cutting machine main body 100 can be slid back and forth.

According to the desktop cutting machine 1 of the first embodiment described above, the dust collecting hose 162 for collecting cutting dust is connected to the hose intermediate connection provided at the main body side connection port 161 and the main body support portion 60 on the cutting machine main body 100 side. It is connected to the support side connection port 171 of the relay duct 170 as a part in a state where it can smoothly rotate around the axis H with a small external force. Therefore, when an unreasonable external force such as bending the curved routing path is applied to the dust collecting hose 162, or the cutting machine main body 100 swings in the vertical direction or slides in the front-rear direction, the routing path When is changed, the dust collecting hose 162 rotates around its axis H to release an unreasonable external force or the like, so that a smooth curved handling path is maintained and bending is prevented, whereby dust is prevented from bending. A smooth flow is ensured.

Further, for example, since the discharge nozzle 176 for connecting the dust collector is provided so that the discharge direction can be changed up and down (swinging), the discharge nozzle 176 is connected to the connection hose when the connection hose is connected to the discharge nozzle 176. By changing the discharge direction in the vertical direction in accordance with the above, twisting or bending of the connecting hose is avoided, and in this respect, convenience when connecting the connecting hose is achieved.

Further, the length of the dust collecting hose 162 is set to a length that allows swinging or sliding operation over the entire vertical swing range of the cutting machine main body 100 set by the main body support portion 60 and the entire sliding range in the front-rear direction. Has been done. Therefore, the vertical swing operation and the front-rear slide operation of the cutting machine main body 100 are not hindered by the dust collecting hose 162.

Various changes can be made to the embodiments described above. For example, a configuration in which the dust collecting hose 162 is connected to both the main body side connection port 161 on the cutting machine main body 100 side and the support side connection port 171 on the main body support portion 60 side in a rotatable state around the axis H has been illustrated. Only one of them may be connected in a state where it can rotate smoothly even with a small external force. The connection port to which the dust collecting hose 162 is smoothly rotatably connected around the axis H is a connection provided in another part of the cutting machine main body 100, another part of the main body support portion 60, or the base 10 or the table 20. The same can be applied to the mouth.

Further, the configuration in which the dust collecting hose 162 is rotatably connected around the axis H by using the ring-shaped holding members 164 and 172 is illustrated, but as a configuration in which the dust collecting hose 162 is rotatably connected by using a rolling bearing such as a needle bearing. May be good.

Further, the discharge nozzle 176 may be provided so as to be swingable in the vertical or horizontal direction and rotatably around the axis, and the connection hose of the dust collector may be rotatably connected around the axis.

Further, the case where the downstream end of the dust collecting hose 162 is connected to the support side connection port 171 is illustrated, but the intermediate position of the dust collecting hose 162 is connected to the relay duct 170 as the hose intermediate connecting part, for example, in a ring shape. When the clip is used for holding, the same effect can be obtained by inserting the dust collecting hose 162 on the inner peripheral side of the clip in a state in which the dust collecting hose 162 can be smoothly rotated around the axis H.

Further, although the AC power supply type desktop cutting machine 1 has been illustrated, the same can be applied to a battery type desktop cutting machine using a battery that can be repeatedly used by charging as a power source.

Further, from FIG. 39 onward, the desktop cutting machine 300 according to the second embodiment in which the portion to which the dust collector as an external device is connected is changed is shown. The desktop cutting machine 1 according to the first embodiment illustrated above has a configuration in which a dust collector as an external device is connected to a discharge nozzle 176 that communicates with a relay duct 170 provided on the main body support portion 60 side. On the other hand, the desktop cutting machine 300 of the second embodiment described below has a configuration in which the dust collector 320 as an external device is connected to the cutting machine main body 100 side. Further, the desktop cutting machine 300 of the second embodiment is a rechargeable desktop cutting machine powered by two battery packs 301. The two battery packs 301 are highly versatile slide-mounted lithium-ion batteries that can also be used as a power source for other rechargeable power tools such as screw tighteners, and are on the right side of the base 107 of the cutting machine body 100, respectively. It is attached to the battery attachment portion 307 provided in the portion. The attached battery pack 301 can be removed by sliding it upward. The removed battery pack 301 can be used repeatedly by charging it with a separately prepared charger. In addition, the same members and configurations as those of the desktop cutting machine 1 of the first embodiment will be described by using the same symbols.

A dust guide 160 for receiving the blown-up cutting powder is attached to the lower surface of the rear portion of the base portion 107 integrally provided at the rear portion of the fixed cover 103. Further, a main body side connection port 310 for connecting a dust collecting hose is provided on the rear portion of the carrying handle 154 and the upper surface of the rear portion of the base portion 107. As shown in FIG. 39, the main body side connection port 310 communicates with the dust guide 160 via the inside of the base portion 107. The cut powder received by the dust guide 160 is blown up into the main body side connection port 310 through the inside of the base portion 107. The main body side connection port 310 extends rearward along the tangential direction of the cutting powder generation site.

The tip side of the main body side connection port 310 is branched into a first connection port 311 and a second connection port 315. The first and second connection ports 311, 315 are bent in different directions with respect to the main body side connection port 310. As shown in FIG. 39, with the cutting machine main body 100 positioned at the lower moving end, the second connection port 315 is bent in a direction of opening substantially straight upward in the vertical direction. The second connection port 315 is bent in a direction (orthogonal direction) of opening from the tip end portion of the main body side connection port 310 to the right side. One end side of the dust collecting hose 162 is connected to the first connection port 311. Unlike the first embodiment, the connection structure of the dust collecting hose 162 to the first connection port 311 has a configuration in which the dust collecting hose 162 is fixedly connected around the hose axis H.

The other end side of the dust collecting hose 162 is connected to the support side connection port 313 of the relay duct 312 as a hose intermediate connection portion provided on the right side portion of the main body support portion 60. Similar to the first embodiment, the other end side of the dust collecting hose 162 is connected to the support side connection port 313 in a state of being rotatable around the axis H thereof. As shown by the alternate long and short dash line in FIG. 39, the dust collecting hose 162 is largely curved upward, for example, between the first connection port 311 on the cutting machine main body 100 side and the support side connection port 313 on the main body support portion 60 side. It is connected via a routing route. The length of the dust collecting hose 162 between the first connection port 311 and the support side connection port 313 is the total swing range in the vertical direction and the total slide range in the front-rear direction of the cutting machine main body 100 as in the first embodiment. It is set to a length that allows the movement of.

The inside of the relay duct 312 and the support side connection port 313 communicates with the dust collecting duct 174. The dust leaking from the dust guide 160 and scattered rearward is received by the dust collecting duct 174 and then flows into the inside of the relay duct 312 and the support side connection port 313. The direction in which the dust in the dust collecting hose 162 flows is opposite to that of the first embodiment, and flows from the support side connection port 313 toward the second connection port 315. In the second embodiment, the portion corresponding to the discharge nozzle 176 in the first embodiment is omitted from the relay duct 312. In the second embodiment, the connection hose 321 for connecting the dust collector is connected to the second connection port 315 of the main body side connection port 310. Therefore, in the second embodiment, the second connection port 315 corresponds to a discharge nozzle for connecting the dust collector 320 as an external device.

As shown in FIG. 41, the main body side connection port 310 is provided so as to extend substantially horizontally to the rear when the cutting machine main body 100 is returned to the top dead center position. Therefore, as shown in FIG. 39, when the cutting machine main body 100 is located at the lower moving end and the cutting process is performed, the connection hose 321 extends from the second connection port 315 almost straight upward in the vertical direction. Become. Since the connecting hose 321 is connected in a direction extending upward, the cutting machine main body 100 can be slid back and forth to smoothly perform the cutting process without causing a problem that the connecting hose 321 interferes with the rear wall surface or the like. It can be carried out. Further, since the connecting hose 321 is connected in a direction extending upward, the dust collector 320 can be connected while avoiding interference with the rear wall surface of the connecting hose 321, whereby the cutting machine can be connected in this connected state. The main body 100 can be locked at the lower moving end position to store the desktop cutting machine 300, and can be carried around.

In this way, one end side of the dust collecting hose 162 is connected to the first connection port 311 of the main body side connection port 310, and the other end side is connected to the support side connection port 313 in a rotatable state around its axis H. Therefore, as in the first embodiment, even when the cutting machine main body 100 is swung in the vertical direction and the handling path is changed by the sliding operation in the front-rear direction, the dust collecting hose 162 Since both ends rotate around the axis H and no excessive bending or twisting (narrowing of the cross-sectional area) occurs in the middle of the path of the dust collecting hose 162, a smoothly curved handling path is maintained. As a result, the original cross-sectional area is secured over the entire area, and high dust collection efficiency can be reliably maintained.

Further, in the desktop cutting machine 300 of the second embodiment, the dust collector 320 as an external device is connected to the second connection port 315 provided on the cutting machine main body 100 side and closer to the dust collecting guide 160. Therefore, as a result of the rotary cutting tool 102 having a relatively small diameter, even if the wind force of the dust collecting wind generated by the rotation is not sufficiently large, the cutting dust or the like received by the dust collecting guide 160 is efficiently collected by the dust collector. Dust can be collected at 320. In the case of the second embodiment, the cutting powder received in the dust collecting duct 174 on the main body support side flows into the second connection port 315 through the relay duct 312 and the dust collecting hose 162, and then flows through the connecting hose 321 to the dust collector. It is collected at 320.

The desktop cutting machine 300 of the second embodiment has a function of interlocking the start and stop of the dust collector 320 as an external device with the start and stop of the cutting machine main body 100 side. As shown in FIGS. 39 and 40, a communication adapter 302 for performing wireless communication with the dust collector 320 is mounted on the upper surface side of the base portion of the handle portion 150. The communication adapter 302 is previously associated (paired) with the dust collector 320 for wireless communication. The communication adapter 302 is detachably mounted inside the handle portion 150 in the upward direction. By being mounted inside, the dustproof and waterproof properties of the communication adapter 302 are ensured. Further, since the communication adapter 302 is removable, it can be easily removed and used for another device, for example, when wireless communication is not performed. In this respect, the communication adapter 302 and thus the wireless communication function or The usability and versatility of the desktop cutting machine 300 can be improved. By wireless communication via the communication adapter 302, the dust collector 320 can be started and stopped in conjunction with the start and stop operations of the desktop cutting machine 300, whereby the operability and workability of the dust collector 320 as an external device can be started. Can be enhanced.

In the second embodiment, unlike the first embodiment, a DC brushless motor is used for the electric motor 303. Similar to the first embodiment, the controller accommodating portion 305 is provided on the upper portion of the electric motor 303. The controller housing unit 305 mainly houses a rectangular flat plate-shaped controller in which a control board for controlling the operation of the electric motor 303 and the like is housed in a shallow-bottomed case and resin-molded. The control board of the controller is based on, for example, a control circuit composed of a microcomputer that transmits a control signal based on the rotation position information of the rotor detected by the sensor board built in the electric motor 303, and a control signal received from this control circuit. An auto stop that cuts off the power supply to the electric motor 303 so that it does not become over-discharged or over-current depending on the detection result of the state of the battery 301 as a power source and the drive circuit composed of the FET that switches the current of the electric motor 303. Circuits etc. are installed.

Although not shown in FIGS. 39 to 41, the electric motor 303 has a cooling fan inside the motor housing 304. When the electric motor 303 is started, the cooling fan rotates integrally with the output shaft. The rotation of the cooling fan introduces outside air into the motor housing 304. An intake port 304a for introducing outside air is provided at the right end (rear surface) of the motor housing 304. An intake port 305a for introducing outside air is also provided on the right end surface (rear surface) of the controller accommodating portion 305. Further, the inside of the controller housing portion 305 is communicated with the inside of the motor housing 304 via a communication passage. Therefore, when the electric motor 303 is activated and the cooling fan rotates, the outside air is introduced into the motor housing 304, and the outside air is also introduced into the controller housing portion 305 via the intake port 305a. The inside of the controller accommodating portion 305 and the control board are cooled by the outside air introduced through the intake port 305a. An exhaust port 306 is provided on the rear surface side of the gear head portion 120. The outside air (cooling air) introduced into the motor housing 304 and the controller housing portion 305 is exhausted to the outside from the exhaust port 306. A part of the exhaust port 306 is visible in FIGS. 39 and 41.

1 ... Desktop cutting machine (first embodiment)
W ... Cutting material 10 ... Base 11 ... Lock plate part 12 ... Lock recess 13 ... Angle scale 14 ... Overhanging part 14a ... Pedestal part, 14b ... Auxiliary pedestal part, 14c ... Support hole, 14d ... Holding hole 15 ... Holder metal fitting, 15a ... front support, 15b ... rear support 16 ... fixing screw 20 ... table 20a ... support wall (front side), 20b ... support wall (rear side), 20c ... screw hole 20d ... support hole, 20e ... pedestal, 20f ... Insertion rib, 20 g ... Insertion window 21 ... Rotation support shaft 22 ... Blade edge plate 23 ... Pointer 24 ... Insertion groove 30 ... Rotation lock operation unit 31 ... First rotation lock mechanism 32 ... Second rotation lock mechanism 33 ... Operating member (first rotation lock mechanism)
34 ... Operating member (second rotation lock mechanism)
34a ... Operation unit, 34b ... Slope portion, 34c ... Swing shaft portion 35 ... Screw shaft portion, 35a ... Screw portion 36 ... Transmission bracket (transmission member)
36a ... upper contact portion, 36b ... lower contact portion 36c ... insertion hole (right side), 36d ... insertion groove hole (left side)
37 ... Fixing screw 38 ... Sleeve member 39 ... Operation knob 40 ... Transmission rod (transmission member)
41 ... Rod receiving part 42 ... Lock member 42a ... Input part, 42b ... Output part 43 ... Support shaft 46 ... Engagement shaft 47 ... Lock pin 48 ... Compression spring 50 ... Tilt fixing mechanism 51 ... First pulley 52 ... Thrust bearing 53 ... Flange 54 ... Second pulley, 54a ... Flange portion, 54b ... Engagement recess 55 ... Transmission belt 56 ... Idler 57 ... Arm cover, 57a ... Belt pressing portion 58 ... Engagement pin 59 ... Compression spring 60 ... Main body support portion 61 ... Main body support arm, 61a ... Belt pressing portion 62 ... Tilt positioning mechanism 63 ... Tilt receiving portion 64 ... Tilt support portion, 64a ... Insertion hole, 64b ... Step portion 65 ... Left and right tilt shaft, 65a ... Screw shaft portion 66, 67 ... Tilt stopper bolt 68 ... Right angle positioning release button, 68a ... Right angle stopper bolt 69 ... Right angle positioning part, 69a ... Contact part, 69b ... Engagement part 70 ... Tilt positioning rod, 70a ... Contact part 71 ... Compression spring 72 ... Operation Bracket 72a ... Operation knob 73 ... Operation knob 75 ... Slide bar (upper side)
76 ... Slide bar (lower side)
77 ... Main body slider 77a ... Main body support part, 77b ... Support cylinder part, 77c ... Shallow engagement groove, 77d ... Deep engagement groove 77e ... Relief recess, 77f ... Lock hole 78 ... Coupling member 79 ... Transmission rod, 79a ... Bearing (Rear side), 79b ... Bearing (Front side)
80 ... Positioning fence, 80a ... Positioning surface 81 ... Base part, 81a ... Positioning hole 82 ... Auxiliary fence 82a ... Positioning pin part, 82b ... Clip part, 82c ... Rear part, 82d ... Support hole 83 ... Coupling part 90 ... Right angle positioning Mechanism 91 ... Right angle positioning bolt 92 ... Support shaft 93 ... Twisting spring 94 ... Compression spring 100 ... Cutting machine body 101 ... Electric motor 102 ... Cutting tool 103 ... Fixed cover, 103a ... Arrow 104 indicating the rotation direction of cutting tool 102 ... Movable Cover, 104a ... Boss 105 ... Vertical swing support shaft 106 ... Twisting spring 107 ... Base 108 ... Lock hole 109 ... Bearing (ball bearing)
110 ... motor housing, 110a ... intake port 111 ... stator 112 ... rotor, 112a ... rectifier 113 ... motor shaft, 113a ... output gear J ... motor axis 114, 115 ... bearing 116 ... cooling fan 117 ... carbon brush 120 ... Gear head portion 121 ... Gear housing 122 ... 1st driven gear 123 ... 1st driven shaft 123a, 123b ... Bearing 124 ... 2nd driven gear 125 ... 3rd driven gear 126 ... 2nd driven shaft 126a, 126b ... Bearing 127 ... 4 Driven gear 130 ... Spindle 130a, 130b ... Bearing 131 ... Outer flange 132 ... Inner flange 134 ... Cutting tool fixing screw 140 ... Controller housing 141 ... Controller 145 ... Exhaust port 150 ... Handle 151 ... Leg 152 ... Switch lever 153 ... Lock-off switch 154 ... Carrying handle 160 ... Dust guide 161 ... Main body side connection port, 161a ... Engagement hole 162 ... Dust collection hose, H ... Dust collection hose axis 163 ... Connection member, 163a ... Groove 164 ... Holding member 164a ... Engagement convex portion 165 ... Connection member, 165a ... Groove portion 170 ... Relay duct (hose intermediate connection portion)
171 ... Support side connection port, 171a ... Engagement hole 172 ... Holding member, 172a ... Engagement convex portion 173 ... Base portion, 173a ... Internal passage 174 ... Dust collection duct 175 ... Joint 176 ... Discharge nozzle 180 ... Vertical vise 181 ... 1st strut 182 ... 1st arm portion 183 ... 2nd strut 184 ... 2nd arm portion 185 ... Screw shaft 186 ... Pressing plate 187 ... Knob 200 ... Lower limit position switching mechanism 201 ... Stopper plate, 201a ... Knob portion, 201b ... Relief hole 202 ... Stopper support part 203 ... First stopper screw (front side)
204 ... 2nd stopper screw (rear side)
210 ... Swing lock mechanism 211 ... Lock pin 212 ... Compression spring 213 ... Knob 213a ... Engagement convex part 220 ... Slide intermediate stopper mechanism 221 ... Stopper plate 221a ... Stopper part 222 ... Support shaft 230 ... Slide rear end position lock Mechanism 231 ... Lock pin, 231a ... Knob 300 ... Desktop cutting machine (second embodiment)
301 ... Battery pack 302 ... Communication adapter 303 ... Electric motor (DC brushless motor)
304 ... Motor housing, 304a ... Intake port 305 ... Controller housing, 305a ... Intake port 306 ... Exhaust port 307 ... Battery mounting part 310 ... Main unit side connection port 311 ... First connection port 312 ... Relay duct 313 ... Support side connection port 315 ... 2nd connection port 320 ... Dust collector 321 ... Connection hose

Claims (7)

A table on which a cutting material is placed and a tabletop cutting machine in which the cutting machine main body is swingably provided in the vertical direction with respect to the table.
Comprises a body-side connecting port provided in the cutting unit for connecting the first end portion of the dust collecting hose, the first end portion of the dust collecting hose can be smoothly rotated around its axis In the state, it is connected to the main body side connection port and
In order to connect the second end portion of the dust collecting hose, a hose intermediate connecting portion is provided on the side that supports the cutting machine main body so as to be swingable in the vertical direction.
A support side connection port is provided in the hose intermediate connection portion, and the second end portion of the dust collecting hose is connected to the support side connection port in a state where it can smoothly rotate around its axis.
A holding member for connecting the first end portion and the second end portion of the dust collecting hose to the main body side connection port or the support side connection port, respectively, is provided.
By displacing the holding member in the radial direction intersecting the axis of the dust collecting hose, the holding member is disengaged from the main body side connection port or the support side connection port, and the dust collecting hose is moved to the main body side connection port and A desktop cutting machine that can be removed from the support side connection port. The desktop cutting machine according to claim 1.
The holding member has an annular shape and has an annular shape.
A desktop cutting machine in which a groove into which the holding member can enter is provided on the entire circumference of the outer peripheral surface of the first end portion and the second end portion of the dust collecting hose. The desktop cutting machine according to claim 1 or 2.
The holding member is inserted into the first end portion or the second end portion of the dust collecting hose, and is elastically deformed in the diameter-expanding direction to engage with the main body side connection port or the support side connection port. A desktop cutting machine that detaches from the main body side connection port or the support side connection port by being elastically deformed in the diameter reduction direction. The desktop cutting machine according to any one of claims 1 to 3.
The dust collecting hose is a desktop cutting machine which is a bellows-shaped flexible hose having elasticity in the hose axis direction. The desktop cutting machine according to any one of claims 1 to 4.
The support side connection port communicates with a discharge nozzle for connecting a dust collector as an external device, and the discharge nozzle is a desktop cutting machine having a configuration in which the discharge direction can be changed. The desktop cutting machine according to any one of claims 1 to 4.
A desktop cutting machine provided with a branching discharge nozzle for connecting a dust collector as an external device to the main body side connection port. The desktop cutting machine according to any one of claims 1 to 6.
The cutting machine main body is supported so as to be swingable in the vertical direction and slidable in the front-rear direction via a main body support portion, and the hose intermediate connection portion is provided on a side portion of the main body support portion. The length of the dust collecting hose between the main body side connection port and the hose intermediate connection portion is set to a length that allows the sliding operation over the entire sliding range of the cutting machine main body set by the main body support portion. Desktop cutting machine.

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