JP5391839B2 - Tabletop cutting machine - Google Patents

Description

  The present invention relates to a tabletop cutting machine such as a tabletop circular saw, and more particularly to a tabletop cutting machine including a display unit that displays an inclination angle of a saw blade during inclined cutting.

  There is known a tabletop cutting machine including a turntable rotatably attached to a base portion and a cutting portion having a circular saw blade attached to the turntable so as to be tiltable (Patent Document 1). In such a tabletop cutting machine, the member to be cut can be cut at an angle by rotating the turntable relative to the base portion, and the member to be cut can be cut at an angle by tilting the cutting portion with respect to the turntable. It becomes possible. A scale for reading the angle of inclination of the circular saw blade is provided at the mounting portion between the turntable and the cutting portion behind the turntable. In some cases, the angle of inclination of the circular saw blade is detected using an optical sensor and a slit and displayed on a digital display (Patent Document 2).

Japanese Patent Laid-Open No. 11-254401 JP 2006-289800 A

  By the way, in the technique disclosed in Patent Document 2, since the tilt angle of the circular saw blade is digitally displayed, the angle can be easily grasped as compared with the technique of reading the tilt angle with a scale on the rear side of the turntable. However, in order to digitally display the tilt angle, in addition to the sensor unit using the optical sensor and the slit and the digital display unit, an arithmetic unit for calculating the tilt angle from the output of the sensor unit and displaying it on the digital display unit Etc. are required. For this reason, there exists a subject that the whole structure becomes complicated and cost increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a tabletop cutting machine capable of reducing the cost with a simple configuration and easily grasping the inclination angle of the circular saw blade.

  In order to achieve the above object, a tabletop cutting machine according to a first aspect of the present invention includes a base portion on which a workpiece can be placed and an upper portion of the base portion that can be rotated about a first axis. A cutting portion including a table portion provided in the table, a tilting portion provided in the table portion so as to be rotatable around a second axis, and a rotary blade and a rotary blade driving device for driving the rotary blade, A swinging portion provided in the tilting portion so as to be rotatable around a third axis so as to move the portion up and down above the table portion, and the tilting when the tilting portion is rotated with respect to the table portion A rotation angle accelerating unit that accelerates and transmits the rotation angle of the unit, and a tilt angle display unit that is connected to the rotation angle acceleration unit and displays the rotation angle of the tilt unit. It is characterized by.

In addition, the tilt angle display unit has a scale that is connected to the rotation angle acceleration unit and rotates.
It is preferable that the tilt angle display unit displays the rotation angle of the tilting unit by rotating the scale with respect to the indicating unit provided on the table unit.

  Further, the tilting part is provided at an end of the table part, and the table part is directed from the tilting part toward the first axis in the vicinity of the end facing the tilting part across the first shaft. A neck portion protruding in the direction may be provided, and the tilt angle display portion may be provided on the neck portion.

  In addition, the tilting unit has a tilting fixing unit that fixes the tilting unit with respect to the table unit, and the tilting unit operates the tilting fixing unit so that the tilting unit is fixed or rotatable with respect to the table unit A fixed operation unit may be provided on the neck.

  Furthermore, the table has a table fixing portion that fixes the table portion to the base portion, and operates the table fixing portion so that the table portion is fixed or rotatable with respect to the base portion. A fixed operation unit may be provided on the neck.

  Further, the rotation angle accelerating portion includes a first gear portion that is formed so that a tooth row is formed in an arc shape centering on the second axis and is rotated integrally with the tilting portion; A second gear portion meshing with the first gear portion and having a radius smaller than a radius of an arc of the first gear portion; and an axis fixed to the second gear portion and extending toward the neck portion A third gear portion fixed to the shaft and housed in the neck portion, and a fourth gear portion rotatably supported in the neck portion and meshing with the third gear portion. The tilt angle display unit may be connected to the fourth gear unit.

Furthermore, the tabletop cutting machine according to the second aspect of the present invention includes a base portion on which a workpiece can be placed on an upper portion, and a table portion provided on the base portion so as to be rotatable about a first axis. A tilting portion provided at an end of the table portion so as to be rotatable around a second axis, and the first tilting portion from the tilting portion in the vicinity of the end facing the tilting portion across the first shaft. A neck portion provided on the table portion protruding in a direction toward the axis; and a cutting portion including a rotary blade and a rotary blade driving device for driving the rotary blade, and the cutting portion is moved up and down above the table portion. A swinging portion provided in the tilting portion so as to be rotatable around a third axis, and a rotation angle for transmitting a rotation angle of the tilting portion when the tilting portion is rotated with respect to the table portion. A transmission unit and a rotation angle of the tilting unit connected to the rotation angle transmission unit; A tilt angle display unit provided on the neck, a tilt fixing unit that fixes the tilt unit to the table unit, and the tilt unit fixed or rotatable with respect to the table unit; A tilt fixing operation unit provided on the neck for operating the tilt fixing unit, and the rotation angle transmitting unit accelerates the tilt angle of the tilting unit with respect to the table unit to display the tilt angle display unit. It is characterized by transmitting .

Further, the tilt angle display unit is connected to the rotation angle transmission unit and has a scale that rotates.
It is preferable that the tilt angle display unit displays the rotation angle of the tilting unit by rotating the scale with respect to the indicating unit provided on the table unit.
A tabletop cutting machine according to a third aspect of the present invention includes a base portion on which a workpiece can be placed on an upper portion, and a table portion provided on the base portion so as to be rotatable around a first axis. A tilting portion provided at an end of the table portion so as to be rotatable around a second axis, and the first tilting portion from the tilting portion in the vicinity of the end facing the tilting portion across the first shaft. A neck portion provided on the table portion protruding in a direction toward the axis; and a cutting portion including a rotary blade and a rotary blade driving device for driving the rotary blade, and the cutting portion is moved up and down above the table portion. A swinging portion provided in the tilting portion so as to be rotatable around a third axis, and a rotation angle for transmitting a rotation angle of the tilting portion when the tilting portion is rotated with respect to the table portion. Connected to the transmission unit and the rotation angle transmission unit, and displays the rotation angle of the tilting unit; A tilt angle display section provided in the neck section, a tilt fixing section that fixes the tilt section to the table section, and the tilt section relative to the table section so that the tilt section is fixed or rotatable. A tilt fixing operation unit provided on the neck for operating the tilt fixing unit, the tilt angle display unit having a scale connected to the rotation angle transmitting unit and rotating, the scale being the table The tilt angle display unit displays the rotation angle of the tilt unit by rotating with respect to the instruction unit provided in the unit.

  According to the present invention, the rotation angle accelerating portion increases the rotation angle of the tilting portion and transmits the rotation angle to the rotation angle display portion, so that the cost can be reduced with a simple configuration and the inclination angle of the circular saw blade can be reduced. It can be displayed easily recognizable.

It is the perspective view seen from the left front of the desk circular saw which shows one Embodiment of this invention. It is the perspective view which looked at the desktop circular saw of FIG. 1 from the right rear. FIG. 2 is a left side cross-sectional view of the main part around the turntable and neck of the tabletop circular saw of FIG. 1. It is principal part sectional drawing which shows the relationship between the tilting support part and tilting part of the desktop circular saw of FIG. It is a rear view which shows the principal part periphery of the tilting part of the desktop circular saw of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a bottom view of the turntable of the tabletop circular saw of FIG. It is a top view which shows the principal part periphery of the neck part of the desktop circular saw of FIG. It is a front view at the time of tilting of the desktop circular saw of FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the tabletop circular saw 1 is installed on the floor surface and has a base portion 11 that carries a workpiece such as wood on the upper surface, and a direction indicated by an arrow A with respect to the base portion 11. A turntable 21 that is pivotally attached, a tilting portion that is tiltably attached to the rear end of the turntable 21 in FIG. 1 in the direction indicated by arrow B, and tilts with the cover 87, and an arrow C with respect to the tilting portion. A frame 31 (swinging part) attached so as to be swingable in the direction shown, and a cutting part 41 provided with a circular saw blade 123 (rotating blade) attached to the frame 31 for cutting a workpiece. The base portion 11 is a schematic top view that supports the disc-shaped turntable 21 by connecting the right base 12 and the left base 13 disposed on the left and right sides of the turntable 21 and the right base 12 and the left base 13. It is composed of a circular connecting portion 14. On the upper surfaces of the right base 12 and the left base 13 formed in a planar shape for placing the workpiece, a right fence 16 and a left fence 15 for abutting and fixing the workpiece are provided, respectively. . The turntable 21 has a neck portion 22 that protrudes radially outward at a position facing the cover 87 in which the tilting portion is accommodated on the outer periphery in a top view. The neck portion 22 is provided with a fixed handle 23 that is gripped when the turntable 21 is rotated. The cutting portion 41 is provided with a motor housing 122 containing a motor for driving the circular saw blade 123 and a handle 128 that is gripped when the cutting portion is swung toward the turntable 21. The circular saw blade 123 is covered with a saw blade cover 125 fixed to the cutting portion 41 and a safety cover 126 attached to the cutting portion 41 so as to be rotatable according to the swinging of the cutting portion 41. In the following description, as shown in FIG. 1, the direction facing the floor on which the base portion 11 is installed is the lower side of the tabletop circular saw 1 and the opposite direction is the upper side, and the right fence 16 and the left fence 15 are processed. The direction in which the surface in contact with the member faces is the front of the desk circular saw 1, the opposite direction is the rear, and the direction in which the right fence 16 and the left fence 15 extend is the left-right direction (the right fence 16 side is the right side and the left fence 15 side is the left side). ).

  As shown in FIG. 3, the connecting part 14 of the base part 11 has a hollow cylindrical circuit in which an upper part is opened at a substantially center between the right base 12 and the left base 13 and a through hole 17 is formed in the lower part. A dynamic support 18 is provided. In addition, a through hole 24 is formed at the center of the lower surface of the turntable 21 corresponding to the rotation support portion 18, and protrudes downward in a cylindrical shape having an outer diameter slightly smaller than the inner diameter of the rotation support portion 18. A rotating shaft portion 25 is provided. The rotation shaft portion 25 of the turntable 21 is inserted into the rotation support portion 18 of the base portion 11, and the nut 32 is inserted into the bolt 32 that passes through the through hole 24 of the rotation shaft portion 25 and the through hole 17 of the rotation support portion 18. By screwing 33, the turntable 21 is supported by the base portion 11 so as to be rotatable around a rotation shaft 50 (first shaft). Note that the upper surface of the turntable 21 supported by the base portion 11 is positioned on substantially the same plane as the upper surfaces of the right base 12 and the left base 13.

  As shown in FIG. 1, the connecting portion 14 between the right base 12 and the left base 13 has an arc portion 19 that protrudes forward in an arc shape centering on the rotation shaft 50 of the turntable 21 when viewed from above. Is provided. A plurality of locking grooves 60 that are engaged with convex portions 28 of the lock lever 26 described later are formed in the lower side of the arc portion 19. The plurality of locking grooves 60 are bilaterally symmetrical with respect to an axis (reference axis (0 °)) extending orthogonally to the left and right fences 15, 16 forward from the rotation shaft 50, for example, 15 °, 30 °, 45 It is formed at a position forming a predetermined angle such as °.

  As shown in FIG. 3, a lock lever 26 is fixed by a bolt 27 in front of the rotation shaft portion 25 on the lower surface of the turntable 21. The lock lever 26 is made of an elastic member such as a sheet metal, extends forward beyond the neck portion 22, is bent upward along the front end surface of the neck portion 22, and a pressing portion 29 is provided at the bent tip portion. It is formed. Further, a convex portion 28 that protrudes upward is provided at a position facing the lower portion of the side surface of the arc portion 19 of the lock lever 26. In the normal state of the lock lever 26, the convex portion 28 is urged upward, that is, toward the lower side of the arc portion 19. When the turntable 21 rotates and the convex portion 28 is positioned in the locking groove 60 of the arc portion 19, the convex portion 28 engages with the locking groove 60 and the turntable 21 is fixed at a predetermined angle. Is done. The turntable 21 can be rotated about the rotation shaft 50 with respect to the base portion 11 by operating the pressing portion 29 to release the engagement between the convex portion 28 and the locking groove 60. The fixed handle 23 provided on the neck portion 22 has a shaft 91 extending toward the rotation shaft 50, and a male screw portion 61 is formed on the outer periphery of the shaft 91 on the rotation shaft 50 side. The fixed handle 23 is supported by screwing a male screw portion 61 into a female screw portion 62 provided on the neck portion 22, and a distal end portion 63 of the male screw portion 61 that protrudes through the female screw portion 62 has a base portion. 11 faces the side surface of the arc portion 19. When the fixed handle 23 is tightened, the tip portion 63 comes into contact with the side surface of the arc portion 19, so that the turntable 21 cannot be rotated.

  A tilting support portion 70 for supporting the tilting portion 74 is provided at an end portion of the turntable 21 that faces the neck portion 22 across the rotation shaft 50. As shown in FIG. 4, the tilt support part 70 is formed with a recess 71 and a support hole 72. An extension line passing through the center of the support hole 72 is substantially flush with the upper surface of the turntable 21 and passes through the rotation shaft 50. In addition, a rotation wall 78 is formed in the tilting portion 74, and a rotation hole 75 is formed in the approximate center of the rotation wall 78. The rotating wall 78 of the tilting part 74 is brought into contact with the edge of the recess 71 of the tilting support part 70, and the pin-shaped bolt 76 is inserted into the rotating hole 75 and the support hole 72 and fastened with a nut (not shown). As a result, the tilting portion 74 is rotatably supported by the tilting support portion 70 around the tilting shaft 51 (second shaft) that is the center of the pin-shaped bolt 76 coaxial with the center of the support hole 72. When the tilting portion 74 rotates, the rotating wall 78 slides with respect to the edge of the recess 71. In the following description, the rotation around the tilting axis 51 (second axis) is referred to as tilting.

  As shown in FIG. 5, on the right side (left side in FIG. 5) of the rotation hole 75 of the tilting portion 74, there is a long hole 79 defined by an arc-shaped long hole edge 80 centering on the tilting shaft 51. The penetrating wall 78 is formed. Further, as shown in FIG. 6, the long hole edge 80 protrudes rearward from the rear surface of the tilting portion 74, and the inner wall facing the long hole edge 80 becomes narrower from the rear end toward the rotating wall 78. . In the state where the tilting part 74 is assembled to the tilting support part 70, the tilting support part 70 is provided with a clamp hole 73 at a position facing the long hole 79 of the tilting part 74.

  As shown in FIG. 6, a clamp shaft 81 is inserted into the clamp hole 73 and the long hole 79. The clamp shaft 81 has a hole 88 penetrating the center in the longitudinal direction, and a wide portion 89 wider than the width of the arcuate edge facing the long hole edge 80 at the rear end. The clamp shaft 81 is loosely fitted in the clamp hole 73, does not contact the inner wall of the long hole 79, and the wide portion 89 contacts the long hole edge 80. A wire 82 is inserted into the hole 88, and the wire 82 is connected to a lever 83 provided in the neck portion 22 as shown in FIG.

  When the lever 83 rotates, the wire 82 is pulled forward (leftward in FIG. 6), the clamp shaft 81 moves to the tilt support part 70 side, and the wide part 89 abuts on the long hole edge 80. Therefore, the frictional force between the rotation wall 78 of the tilting part 74 and the tilting support part 70 increases, and the tilting part 74 is fixed so as not to tilt with respect to the tilting support part 70. In a state where the lever 83 is released (a state where the wire 82 is not pulled), the tilting portion 74 can tilt with respect to the tilting support portion 70 within a range in which the clamp shaft 81 can move within the long hole 79. In the case of this embodiment, it can tilt to the left within a range of about 0 ° to 45 °.

  As shown in FIG. 5, on the left side (right side in FIG. 5) of the rotation hole 75 of the tilting portion 74, an arc-shaped long hole 151 centering on the tilting shaft 51 passes through the rotation wall 78. It is formed. In addition, the rear surface of the rotating wall 78 is coaxial with the arc-shaped long hole 151 in the rear view, and the tooth row slightly protrudes from the inner arc into the long hole 151 along the inner arc of the long hole 151. An arcuate external gear 77 (first gear portion) formed so as to be fixed is fixed with a screw 152. As shown in FIG. 2, the arc-shaped external gear 77, the long hole edge 80, and the pin-shaped bolt 76 are covered with the cover 87 and are not exposed to the outside.

  As shown in FIGS. 3 and 7, the turntable 21 is provided with a shaft support hole 156 formed in the recess of the tilt support portion 70 and a first shaft 153 that is rotatably supported by the plurality of shaft support portions 157. It is done. The rear end of the first shaft 153 extends beyond the rotation wall 78 of the tilting portion 74, and the first gear 154 is fixed to the rear end. The first gear 154 meshes with the arcuate external gear 77. The ratio of the number of teeth of the first gear 154 and the arcuate external gear 77 is set to, for example, 1:10 so that the rotation angle of the first gear is increased (accelerated) with respect to the tilt angle of the tilt portion 74. .

  Further, as shown in FIGS. 3 and 7, the front end of the first shaft 153 extends into the neck portion 22, and the second gear 155 is fixed to the front end. The second gear 155 meshes with an arcuate external gear 159 that is rotatably supported by the neck portion 22. The ratio of the number of teeth of the second gear 155 and the arcuate external gear 159 is such that, although the rotation angle of the second gear 155 is reduced, the rotation angle of the arcuate external gear 159 relative to the tilting angle of the tilting part 74 is increased. For example, it is set to 10: 4. As a result, when the tilting part 74 tilts by 1 °, for example, the arcuate external gear 159 rotates by 4 °. The first gear 154, the first shaft 153, the second gear 155, and the arcuate external gear 159 constitute a rotation angle speed increasing portion.

  A scale 160 indicating a tilt angle is fixed to the upper surface of the arcuate external gear 159, and an indicator 162 extending to the scale 160 is provided on the indicator mounting portion 161 fixed to the neck portion 22 of the turntable 21. When the arcuate external gear 159 rotates, the scale 160 also rotates. As shown in FIG. 8, the scale 160 and the indicator 162 are visible on the display unit 163 provided on the neck portion 22. The scale 160, the indicator 162, and the display unit 163 constitute a tilt angle display unit. The scale 160 corresponds to a scale, and the indicator 162 corresponds to an instruction unit. With this configuration, the tilt angle can be easily read with a simple configuration.

  As shown in FIGS. 3 to 5, a pair of swing support arms 84 is provided above the tilting portion 74. In the pair of swing support arms 84, the frame 31 is centered on a swing shaft 52 (third axis) passing through the center of the swing support pin 85 via a swing support pin 85 orthogonal to the tilt shaft 51. Mounted so that it can swing. As shown in FIG. 1, the frame 31 is provided with a cutting portion 41 having a circular saw blade 123. A spring (not shown) is charged between the frame 31 and the swing support arm 84, and the frame 31 is urged upward. Therefore, the cutting part 41 is in the uppermost position when not cut. At the time of cutting, the handle 128 is pushed down against the biasing force of the spring.

  In addition, as shown in FIG. 4, in order to prevent the circular saw blade 123 from coming into contact with the turntable 21 when the cutting portion 41 is pushed down between the neck portion 22 and the tilting support portion 70 of the turntable 21). An arcuate recess 124 (not shown) that is recessed in an arcuate shape is formed. As shown in FIG. 1, the upper surface of the arc-shaped recess 124 is covered with a cutting groove plate 125 (not shown) in which a cutting groove 126 (not shown) is formed substantially at the center. Each of the arcuate recess 124 and the cutting groove plate 125 has a sufficient width so that the circular saw blade 123 does not contact even when the tilting portion 74 tilts, and the circular saw blade when the cutting portion 41 is pushed down. 123 passes through the cutting groove 126 and enters the arcuate recess 124 and does not contact the turntable 21. Further, the wire 82 and the first shaft 153 are arranged so as to be biased toward the left and right ends of the arcuate recess 124 of the turntable 21 when viewed from above (the wire 82 is closer to the left end and the first shaft 153 is closer to the right end). Therefore, there is no contact with the circular saw blade 123 entering the arcuate recess 124. That is, the tilting portion 74 is configured to be tiltable in both directions around the second axis.

  Hereinafter, the operation when the workpiece is cut by the tabletop circular saw 1 will be described. When the workpiece is cut by the tabletop circular saw 1, the workpiece is brought into contact with the contact surfaces of the left and right fences 15, 16 and carried on the upper surfaces of the left and right bases 12, 13. Then, the cutting part 41 is pulled down by using the handle 128 and the workpiece is cut by the circular saw blade 123. In addition to this, for the workpiece, angle cutting is performed by cutting the circular saw blade 123 obliquely with respect to the contact surface of the fence 12, and the circular saw blade 123 is inclined with respect to the upper surface of the base portion 11. Inclined cutting is performed.

  When performing angle cutting of the workpiece, the turntable 21 is rotated. In this case, the cutting portion 41 rotates together with the turntable 21, while the workpiece is fixed to the left and right fences 15 and 16 and the left and right bases 12 and 13 and thus does not move. Therefore, when viewed from above, the circular saw blade 123 of the cutting portion 41 forms an angle with respect to the workpiece and can perform angle cutting. The cutting angle of the member to be processed when performing the angle cutting can be selected between a case where the angle is set in advance by the engagement between the locking groove 60 and the convex portion 28 and a case where the angle is an arbitrary angle.

  When the cutting angle is set to a preset angle, the lock table 26 is pushed down from the state where the lock lever 26 is not pushed down to release the engagement between the locking groove 60 and the projection 28 and the turntable 21 is moved. Rotate. After the desired angle is reached, the lock lever 26 is released, and the fixed handle 23 is tightened until it stops rotating at the position where the convex portion 28 is engaged with the locking groove 60, and the distal end portion 63 of the fixed handle 23 is fixed to the base portion 11. The turntable 21 is fixed to the base portion 11 by pressing against the side surface of the arc portion 19. In this case, since the rotation angle of the turntable 21 with respect to the base portion 11 is accurately determined by the engagement between the locking groove 60 and the convex portion 28, it is not particularly necessary to finely adjust the rotation angle.

  Further, when the cutting angle is set to an arbitrary angle, the pressing portion 29 of the lock lever 26 is pressed down, the turntable 21 is turned to the vicinity of the arbitrary angle, and then the fixed handle 23 is tightened until it cannot be turned. The turntable 21 is fixed to the base part 11 by pressing the tip part 63 of the base 23 against the side surface of the arc part 19 of the base part 11.

  Regardless of which method is used to set the cutting angle, the rotation angle of the turntable 21 can be fixed by operating the lock lever 26 and the fixed handle 23 that protrude in front of the neck portion 22 and are adjacent to each other. The operability is improved.

  When performing the inclined cutting of the workpiece, the cutting portion 41 is tilted in the direction of arrow B as shown in FIG. In this case, when viewed from the front, the circular saw blade 123 of the cutting portion 41 forms an angle with respect to the workpiece, so that it is possible to perform inclined cutting. In this case, as shown in FIG. 9, the circular fence 123 is formed by rotating a rotation fence 151 provided on the left fence 15 so as to be rotatable about the rotation shaft 150 counterclockwise. Avoid contact with the left fence 15.

  When the tilt angle is set, the lever 83 provided on the neck portion 22 is loosened to release the contact state between the rotation wall 78 and the tilt support portion 70, and the tilt portion 74 is moved with respect to the tilt support portion 70. The cutting part 41 is tilted in a state where tilting is possible. When the cutting part 41 is tilted, the arcuate external gear 77 fixed to the tilting part 74 rotates the first gear 154. As described above, this rotation is transmitted to the second gear 155 having a larger diameter than the first gear 154 via the first shaft 153, and the second gear 155 rotates the arcuate external gear 159. At this time, according to the ratio of the number of teeth of each gear, for example, in the case of the present embodiment, the tilting portion 74 is tilted by 1 °, and the first gear 154 and the second gear 155 are rotated by 10 °. The gear 159 is enlarged to a rotation angle of 4 °. Then, when the scale 160 provided on the arcuate internal gear 159 rotates, the rotation angle of the cutting unit 41 is enlarged and displayed on the display unit 163. The operator can tilt the cutting portion 41 to a desired tilt angle with high accuracy while easily confirming the tilt angle. When the desired tilt angle is reached, the lever 83 is tightened to bring the rotating wall 78 and the tilt support portion 70 into contact with each other, the tilt portion 74 is fixed to the tilt support portion 70, and tilt cutting is performed. It is also possible to cut by combining tilt cutting and angle cutting.

  According to the table-shaped circular saw 1 configured as described above, when the inclined cutting is performed, the tilt angle of the cutting portion 41 is set so that the arc-shaped external gear 77, the first gear 154, the second gear 155, and the arc-shaped external gear 159 are connected. And the scale 160 is rotated. Therefore, the manufacturing cost can be reduced with a simple configuration, the tilt angle of the cutting portion 41 can be easily confirmed, and the tilt angle can be set with high accuracy. Further, since the display unit 163 for confirming the scale 160 is provided on the upper surface of the neck portion 22, the operator can easily confirm the tilt angle, and the operability is improved. Further, a lever 83 that locks and unlocks the tilting of the cutting portion 41 (tilting portion 74) is provided on the neck portion 22 and is located in the vicinity of the display portion 163 for confirming the tilting angle. Therefore, the operation of locking the tilt angle of the cutting portion 41 can be easily performed while adjusting the tilt angle, and the operability is further improved. The neck 22 is provided with a fixed handle 23 for adjusting the rotation angle of the turntable 21, a pressing portion 29 of the lock lever 26, and a lever 83. Since the operation unit for fixing the rotation angle and the tilt angle to the neck portion 22 and the display unit 163 for confirming the tilt angle are provided in a concentrated manner, the tilt lock operation and the rotation while confirming the tilt angle are performed. The rotation lock operation can be performed without a large movement of the line of sight, and the operability can be further improved.

  The above-described tabletop circular saw 1 has a structure that can be tilted only to the left side. However, the present invention is not limited to such a tabletop circular saw 1, and for example, a tabletop circular saw that can tilt to both the left and right The present invention can also be applied to a desktop slide circular saw that can slide a circular saw blade in the front-rear direction and tilt to the left, right, left, or right.

DESCRIPTION OF SYMBOLS 1 Desktop circular saw 11 Base part 14 Connection part 21 Turntable 22 Neck part 23 Fixed handle 26 Lock lever 31 Frame 41 Cutting part 50 Turning shaft 51 Tilt shaft 52 Swing shaft 77 Arc-shaped external gear 83 Lever 153 First shaft 154 First Gear 155 Second gear 159 Arc-shaped external gear 160 Scale 162 Indicator 163 Display unit

Claims (9)

A base portion on which a workpiece can be placed;
A table portion provided on the base portion so as to be rotatable around a first axis;
A tilting portion provided in the table portion so as to be rotatable around a second axis;
A cutting part having a rotary blade and a rotary blade driving device for driving the rotary blade is provided, and the cutting part is provided in the tilting part so as to be rotatable around a third axis so as to move up and down above the table part. A swinging portion that is
A rotation angle accelerating unit that increases and transmits the rotation angle of the tilting unit when the tilting unit rotates with respect to the table unit;
A tilt angle display unit connected to the rotation angle accelerating unit and displaying a rotation angle of the tilt unit;
A tabletop cutting machine characterized by comprising: The tilt angle display unit is connected to the rotation angle acceleration unit and has a scale that rotates.
The tilt angle display unit displays the rotation angle of the tilting unit by rotating the scale with respect to the instruction unit provided in the table unit.
The tabletop cutting machine according to claim 1, wherein: The tilting part is provided at an end of the table part,
The table portion has a neck portion protruding in a direction from the tilting portion toward the first shaft in the vicinity of an end facing the tilting portion across the first shaft,
The tilt angle display is provided on the neck;
The tabletop cutting machine according to claim 1 or 2, characterized in that. A tilt fixing part for fixing the tilt part to the table part;
A tilt fixing operation portion for operating the tilt fixing portion so as to be in a fixed state or a rotatable state with respect to the table portion;
The tabletop cutting machine according to claim 3, wherein: A table fixing part for fixing the table part to the base part;
A table fixing operation part for operating the table fixing part so as to be in a fixed state or a rotatable state with respect to the base part is provided in the neck part.
The tabletop cutting machine according to claim 3 or 4, characterized in that. The rotation angle acceleration part is
A first gear portion formed so that a tooth row is formed in an arc shape centering on the second axis and rotated integrally with the tilting portion;
A second gear portion having a radius smaller than a radius of an arc of the first gear portion and meshing with the first gear portion;
An axis fixed to the second gear portion and extending toward the neck portion;
A third gear portion fixed to the shaft and housed in the neck portion;
A fourth gear part rotatably supported in the neck part and meshing with the third gear part;
With
The tilt angle display unit is connected to the fourth gear unit.
A tabletop cutting machine according to any one of claims 2 to 5, characterized in that: A base portion on which a workpiece can be placed;
A table portion provided on the base portion so as to be rotatable around a first axis;
A tilting portion provided at an end of the table portion so as to be rotatable around a second axis;
A neck portion provided on the table portion projecting in a direction from the tilting portion toward the first shaft in the vicinity of the end portion facing the tilting portion across the first shaft;
A cutting part having a rotary blade and a rotary blade driving device for driving the rotary blade is provided, and the cutting part is provided in the tilting part so as to be rotatable around a third axis so as to move up and down above the table part. A swinging portion that is
A rotation angle transmitting unit that transmits a rotation angle of the tilting unit when the tilting unit rotates with respect to the table unit;
A tilt angle display unit provided on the neck, which is connected to the rotation angle transmission unit and displays a rotation angle of the tilt unit;
A tilt fixing part for fixing the tilting part to the table part;
A tilt fixing operation unit provided on the neck for operating the tilt fixing unit so that the tilting unit is in a fixed state or a rotatable state with respect to the table unit;
Equipped with a,
The table cutting machine according to claim 1, wherein the rotation angle transmission unit increases the inclination angle of the tilting unit with respect to the table unit and transmits it to the tilting angle display unit . The tilt angle display unit is connected to the rotation angle transmission unit and has a scale that rotates.
The tilt angle display unit displays the rotation angle of the tilting unit by rotating the scale with respect to the instruction unit provided in the table unit.
The tabletop cutting machine according to claim 7, wherein: A base portion on which a workpiece can be placed;
A table portion provided on the base portion so as to be rotatable around a first axis;
A tilting portion provided at an end of the table portion so as to be rotatable around a second axis;
A neck portion provided on the table portion projecting in a direction from the tilting portion toward the first shaft in the vicinity of the end portion facing the tilting portion across the first shaft;
A cutting part having a rotary blade and a rotary blade driving device for driving the rotary blade is provided, and the cutting part is provided in the tilting part so as to be rotatable around a third axis so as to move up and down above the table part. A swinging portion that is
A rotation angle transmitting unit that transmits a rotation angle of the tilting unit when the tilting unit rotates with respect to the table unit;
A tilt angle display unit provided on the neck, which is connected to the rotation angle transmission unit and displays a rotation angle of the tilt unit;
A tilt fixing part for fixing the tilting part to the table part;
A tilt fixing operation unit provided on the neck for operating the tilt fixing unit so that the tilting unit is in a fixed state or a rotatable state with respect to the table unit;
With
The tilt angle display unit is connected to the rotation angle transmission unit and has a scale that rotates.
The tabletop cutting machine, wherein the scale is rotated with respect to an instruction section provided on the table section, and the tilt angle display section displays the rotation angle of the tilt section.

Images