Table cutting tool with positioning stop

Abstract

Table cutting device (1) comprising a table (20) on which a material (W) to be cut by a rotary cutter (12) is arranged, a tool body (10) which is supported by the table (20), and a positioning stop (50) for positioning the material (W) to be cut on a surface of the table (20) by bringing the material (W) to be cut, which is arranged on the table (20), into contact with the positioning stop (50), wherein the positioning stop (50) comprises a base section (53), a first movable stop (51), and a second movable stop (52), wherein the first and the second movable stops (51, 52) are movable with respect to the base section (53), each of the base section (53), the first movable stop (51), and the second movable stop (52) having a positioning surface (51a, 52a).53a) for positioning the material (W) to be cut on the surface of the table (20) by bringing the material (W) to be cut into contact with the positioning surface (51a, 52a, 53a), the first movable stop (51) being rotatable independently of any movement of the second movable stop (52), and the first movable stop (51) being configured such that it is movably supported on the second movable stop (52) such that the first movable stop (51) (i) is displaceable in a left-right direction, and (ii) is rotatable up and down between a position between one side of the rotary cutter (12) and the second movable stop (52) and a position on a side of the second movable stop (52) opposite the rotary cutter (12).

Description

Technical FieldThe present invention relates to a table cutting tool for cutting a cutting workpiece disposed on a table.General State of the ArtCutting tools of this type are provided with a positioning stop for positioning the cutting workpiece on the table. By abutting the cutting workpiece against a positioning surface of the positioning stopper, the cutting workpiece is positioned on the table. In many cases, the positioning stopper is disposed to the left and right of the cutting edge and has been improved such that the positioning surface reaches as close as possible to the cutting edge (cutting position) to enable stable cutting processing.However, cutting tools of this type are provided with functions that make it possible to turn the tool main body portion leftward or rightward and to make the cutting edge obliquely cut into the cutting workpiece or to turn the work table leftward or rightward and to make the cutting edge obliquely cut when viewed in plan view. In such oblique cutting, the position of the cutting edge relative to the positioning stop changes by being inclined to the left or right as viewed by the user. Therefore, in order to prevent interference with the cutting edge, a part of the positioning surface is usually provided movably in the positioning stopper and can be retracted in a direction away from the cutting edge. Techniques for such a movable positioning stopper are listed in the following prior art patents.Japanese Patent Laid-Open No. 2009-255273 discloses a technique in which a part of the positioning surface can be retracted by sliding in the transverse direction. Japanese Patent Laid-Open No. 2006-167885 and Japanese Patent Laid-Open No. H09-103913, a technique is disclosed in which a part of the positioning surface can be retracted by vertically rotating. In U.S. Pat. No. 5755148, a technique is disclosed in which a part of the positioning surface is slidable and another rotatable positioning surface is provided on the displacement receiving surface thereof.According to these conventional techniques, when the cutting edge is inclined approximately during the oblique cutting, a part of the positioning surface can be retracted to a position where the cutting edge is not obstructed, which enables positioning in close proximity to the positioning surface and thus more stable cutting processing when the cutting edge is positioned at right angles.Further table cutters with positioning stops are disclosed in US 2005 / 0 262 983 A1, US 7 757 593 B2, US 2009 0 235 797 A1 and DE 10 2005 031 062 A1.Brief SummaryProblem to be SolvedHowever, there is a need to even further approach the positioning surface of the positioning stopper in the perpendicular cutting when the cutting edge is positioned at the right angle, and in order to meet this need, the retraction structure is insufficient for the positioning surface of the related art, and there is a problem that a sufficient inclination angle of the cutting edge cannot be obtained.The present teachings have been made to solve the aforementioned problems of the prior art and it is its object to enable, on the one hand, a further approach of the positioning surface of the positioning stop to the cutting edge during right-angle cutting and, on the other hand, to enable the positioning surface to be partially or completely retracted during oblique cutting further than usual hitherto.means for achieving the objectThe object is achieved by a tabletop cutting device according to claim 1 or 3.The present teachings are a table cutting tool including a table for arranging a cutting workpiece, a tool main body portion supported on the table, and a positioning stopper that is brought into abutment with the cutting workpiece arranged on the table and performs positioning toward the table surface. In the present teachings, the positioning stop includes a base portion and first and second movable stops each slidable with respect to the base portion. In the present teachings, at least one of the base portion, the first movable stopper, and the second movable stopper includes a positioning surface that is brought into abutment with the cutting workpiece and performs positioning toward the table surface. In the present teachings, the movement of the first movable stopper and the second movable stopper is performed in a manner rotatable independently of each other.According to the present teachings, it is possible to select between a state in which only the first movable stopper has been rotationally operated and moved from a use position to a retraction position and a state in which the first and second movable stoppers have both been moved from the use position to the retraction position, to position the positioning stopper with respect to the cutting workpiece within an unobstructed range at a point of great approach and to perform the cutting processing.In the present teachings, a indexable cutting tool is possible wherein the second movable stopper is slidably supported leftward and rightward with respect to the base portion. In the present teachings, a indexable cutting tool is possible wherein the second movable stop is directly supported by the base portion. In the present teachings, a indexable cutting tool is possible wherein the second movable stop includes a positioning surface. According to this configuration, when the second movable stopper is placed in the use position, the cutting workpiece can be brought into abutment with the positioning surface and positioning in the table surface direction can be performed.In the present teachings, a indexable cutting tool is possible wherein the base portion includes a positioning surface. According to this configuration, the cutting workpiece can be brought into abutment with the positioning surface of the base portion and positioning in the table surface direction can be performed.In the present teachings, a indexable cutting tool is possible wherein the second movable stopper is supported on the upper part of the base portion. According to this configuration, the height of the positioning stopper can be changed. By reducing the height of the positioning stopper, interference with the cutter body can be prevented in the case of bevel cutting, whereby an increased inclination angle of the cutter body can be set.In the present teachings, in any one of the first to sixth aspects thereof, a indexable cutting tool is possible wherein the second movable stopper is slidable to a retraction position so as to be not higher than the first movable stopper.Brief Description of the FiguresFIG. 1 is a left side view of a table cutting tool of the present embodiment in its entirety. The view shows a state in which a tool main body portion is disposed at a top dead center. FIG. 2 is a right side view of the indexable cutting tool of the present embodiment in its entirety. The view shows a state in which a tool main body portion is disposed at a top dead center. FIG. 3 is a front view of the indexable cutting tool of the present embodiment taken in the direction of arrow (III) of FIG. 1. FIG. 4 is a rear side view of the indexable cutting tool of the present embodiment taken in the direction of arrow (IV) of FIG. 1. FIG. 5 is a left side view of the table cutting tool in its entirety. The view shows a state in which the tool main body portion is disposed at a bottom dead center. FIG. 6 is a right side view of the table cutting tool in its entirety. The view shows a state in which the tool main body portion is disposed at a bottom dead center. FIG. 7 shows a top view of the tabletop cutting tool in the direction of the arrow (VII) from FIG. 5. FIG. 8 is a front view of the table cutting tool in its entirety. The view shows a state in which the tool main body portion is inclined leftward. FIG. 9 is a rear side view of the table cutting tool in its entirety. The view shows a state in which the tool main body portion is inclined leftward. FIG. 10 is a perspective view of the positioning stopper in its entirety alone. In the view, a state is shown in which the first and second movable stoppers are both disposed in the use position. FIG. 11 is a sectional view of the positioning stopper in the direction of arrow (XI)-(XI) of FIG. 13. FIG. 12 is a front view of the positioning stopper. In the view, a state is shown in which the first and second movable stoppers are both disposed in the use position. FIG. 13 is a rear side view of the positioning stopper. The view shows a rear side view of the positioning stopper in the state of FIG. 12. FIG. 14 is a front view of the positioning stopper. The view shows a state in which the first movable stopper has been moved to an unlocking position. FIG. 15 is a rear side view of the positioning stopper. The view shows a rear side view of the positioning stopper in the state of FIG. 14. FIG. 16 is a front view of the positioning stopper. The view shows a state in which the first movable stopper has been moved to the retraction position. FIG. 17 is a rear side view of the positioning stopper. The view shows a rear side view of the positioning stopper in the state of FIG. 16. FIG. 18 is a front view of the positioning stopper. The view shows a state in which the first and second movable stoppers have both been moved to the retraction position. FIG. 19 is a rear side view of the positioning stopper. The view shows a rear side view of the positioning stopper in the state of FIG. 18. FIG. 20 is a longitudinal sectional view of a lighting device.EmbodimentAn embodiment of the present teachings will be described below with reference to FIGS. 1 to 20. In FIG. 1, a user is positioned to the right of a tabletop cutting tool 1. In the following description, position descriptions for components and configurations such as front, rear, left, right, top and bottom refer to the perspective of the user.As shown in FIGS. 1 to 7, the table cutting tool 1 of the present embodiment includes a table 20 for arranging a cutting workpiece W, a base 30 that rotatably supports the table 20 leftward and rightward (in the horizontal direction), and a tool main body portion 10 supported via a main body support portion 40 provided at the rear part of the table 20 so as to be pivotable upward and downward and slidable back and forth.At the front part of the table 20, two lock mechanisms for locking the rotational position of the table 20 and unlock levers 21, 22 for unlocking the same, etc. are disposed. On the base 30, left and right auxiliary table portions 31, 31 are provided in pairs. The left and right auxiliary table portions 31, 31 are disposed left and right of the table 20. The surface of the left and right auxiliary table portions 31, 31 and the surface of the table 20 are precisely flush with each other. Between the left and right auxiliary table portions 31, 31, a large cutting workpiece W can be placed in a stable state.On the left and right auxiliary table portions 31, 31, laterally widely protruding holders 32, 32 are provided. An auxiliary tool such as an auxiliary table (not shown) may be attached to the holders 32, 32 to arrange an even larger cutting workpiece W. The holders 32, 32 can be detached by loosening fastening screws 33, 33 provided at the rear part of the auxiliary table portion 31, 31.A positioning stopper 50 extends between the left and right auxiliary table portions 31, 31, and the positioning stopper 50 serves to position the cutting workpiece W in the table surface direction, and will be described in more detail later.A main body support portion 40 includes a tilting motion base portion 41 provided at the rear of the table 20, a tilting motion support portion 42 rotatably coupled to the tilting motion base portion 41, a support arm portion 43 integrally provided with the tilting motion support portion 42 and extending upward, a displacement support portion 44 provided at the upper of the support arm portion 43, and a swing support portion 45 provided at the front end of the displacement support portion 44 and pivotally supporting the tool main body portion 10 upward and downward. Between the tilting motion base portion 41 and the tilting motion support portion 42, a tilting positioning mechanism is accommodated to position the tool main body portion 10 to a right angle cutting position shown in FIGS. 3 and 4 or to a slant cutting position shown in FIGS. 8 and 9 in which it is inclined leftward by 45°. A leftward and rightward tilting movement axis of the tool main body portion 10, which is the rotation center of the tilting movement support portion 42 with respect to the inclination base portion 41, coincides with the surface of the table 20, and also coincides with an axis passing through the rotation center of the table 20. A posture for square cutting or an inclined posture of the tool main body portion 10, which is a rotational posture of the tilting movement support portion 42 with respect to the inclination base portion 41, is fixed by fastening a fastening lever 46.The slide support portion 44 includes a pair of front-and-rear slidable left and right slide rails 44 a, 44 awhich are parallel to each other. To the front portion of the slide rails 44 a, 44 a, the swing support portion 45 is attached. The tool main body portion 10 is supported on the swing support portion 45 so as to be swingable (tiltable) upward and downward via a swing shaft 47. By sliding the slide rails 44 a, 44 atoward and rearward, the tool main body portion 10 can be slid forward and rearward within a certain range, and moreover can be tiltably moved upward and downward within a certain angle.The tool main body portion 10 includes a saw blade 12 rotating by an electric motor 11, a saw blade case 13 covering the upper surface of the saw blade 12, and a movable cover 14 covering the lower surface of the saw blade 12. The rear part of the blade case 13 is supported on the pivot support portion 45 via the pivot shaft 47. On the rear side of the blade case 13 (right side), the electric motor 11 is mounted via a reduction gear portion 16. The reduction gear portion 16 includes a reduction gear and a gear box. By the reduction gear portion 16, the rotational power of the electric motor 11 is decreased and transmitted to a spindle not shown. The saw blade 12 is attached to the spindle.As shown in FIGS. 2 and 6, a plurality of ventilation holes are provided on the rear side of a motor housing of the electric motor 11. When the electric motor 11 is started, a cooling fan housed therein rotates, so that outside air (engine cooling air) enters the engine housing through the ventilation openings. By flowing the introduced engine cooling air forward in the engine housing, the electric motor 11 is cooled. Also, at the rear part of the motor housing, a controller for controlling the motor is housed. This controller is also cooled by the engine cooling air. A part of the introduced motor cooling air is discharged to the outside through exhaust ports provided at the front part of the motor housing, and the remaining air is discharged to the inside of the blade case 13.On the upper side of the gear box of the reduction gear portion 16, a large handle 15 is provided, which includes a front main handle 15a having a loop shape and a rear auxiliary handle 15b. On the inner peripheral side of the main handle 15a, a shift lever 15c for cranking is disposed.The positioning stopper 50 is provided on the rear side of the table 20. The positioning stopper 50 will be described in detail with reference to FIG. 10 ff. The positioning stopper 50 has a part disposed leftward with respect to the saw blade 12 and a part disposed rightward with respect thereto. These parts will be referred to as right stopper 50R and left stopper 50L hereinafter for differentiation. The right stopper 50R has a fixing stopper 55. The left stopper 50L includes a base portion 53, a first movable member 51, and a second movable member 52. The fixing stopper 55 of the right stopper 50R and the base portion 53 of the left stopper 50L are coupled to each other via a semicircular coupling arm 54. A front surface of the fixing stopper 55 of the right stopper 50R is a positioning surface 55 a, on the entire surface of which the back surface of a cutting workpiece W is abutted and positioned. The positioning surface 55a is made high in precision in flatness and perpendicularity with respect to the surface of the table 20.The positioning stopper 50 of the present embodiment has an important feature with respect to the left stopper 50L. The base portion 53 is formed lower than the fixing stopper 55 of the right stopper 50R. A right end portion 53 bof the base portion 53 (saw blade side end portion) is inclined at an angle of more than 45°. Meanwhile, a left end portion 55 b(blade side end portion) of the fixing stopper 55 of the right stopper 50R is inclined only at a small angle (for example, 10°). That is, as for the inclination angle of the tool main body portion 10 to the left or right, a large inclination angle to the left is permitted. In the present embodiment, the positioning surface 53 afor placing and positioning the cutting workpiece W is provided on the entire front surface of the base portion 53.Along the top of the base portion 53, the second movable stopper 52 is supported. The second movable stopper 52 has a transversely elongated and vertically narrow front surface and is supported slidably in the left and right directions. As shown in FIG. 11, a guide protrusion 52 bis provided on the lower side of the second movable stopper 52 in the longitudinal direction. The guide protrusion 52 bis inserted into a guide groove 53 cprovided on the upper surface of the base portion 53 so that the second movable stopper 52 is slidably supported on the upper surface of the base portion 53 in the left and right directions.The displacement position of the second movable stopper 52 can be fixed as desired by tightening a rotation screw 56. In the present embodiment, the entire front surface of the second movable stopper 52 is also a positioning surface 52 a.The first movable stop 51 is supported on the second movable stop 52. As shown in FIGS. 13, 15 and 17, a support arm portion 51 dis integrally provided on the first movable stopper 51. The first movable stopper 51 is supported at the rear of the second movable stopper 52 in a state of being rotatable up and down via a support shaft 57. The support shaft 57 is inserted into a long-groove-shaped support hole 51b provided at the left end portion (on the rotatable base portion side) on the support arm portion 51d. The first movable stopper 51 can be displaced leftward and rightward in the support bore 51 bwithin the range in which the support shaft 57 is relatively displaceable.The first movable stopper 51 can be laterally displaced between a use position shown in FIGS. 12 and 13 and an unlock position shown in FIGS. 14 and 15. As shown in FIGS. 12 and 13, when the first movable stopper 51 is placed in the use position, a state is obtained in which the front surface thereof is placed in a plane with the right side of the positioning surface 52 aof the second movable stopper 52 and the positioning surface 53 aof the base portion 53. In the present embodiment, the front surface of the first movable stopper 51 is also a positioning surface 51 aon which the cutting workpiece W is abutted. By the positioning surfaces 51 a, 52 aof the first and second movable stoppers 51, 52 and the positioning surface 53 aof the base portion 53, a wide positioning surface having approximately the same area as the right stopper 50R is formed.The thickness of the support arm portion 51 dis set so as not to protrude beyond the upper end of the second movable stopper 52 when the first movable stopper 51 is disposed in the use position and the unlock position.On the side where the rotational movement of the support arm portion 51d of the first movable stopper 51 terminates in the longitudinal direction, an engaging recess 51c is provided. The engaging recess 51c is elongated and formed in the same direction as the support hole 51b. In FIGS. 13, 15 and 17, the engaging recess 51 cis opened downward. On the rear side of the second movable stopper 52, in turn, an engaging shaft portion 58 is provided. The engaging shaft portion 58 is provided so as to protrude rearward. When the first movable stopper 51 is rotated downward and is placed in the use position (position of FIG. 13 ) and the unlock position (position of FIG. 15 ), the engagement shaft portion 58 enters the engagement recess 51 c. When the first movable stopper 51 is moved to the unlocking position of FIG. 15, the engaging shaft portion 58 is relatively displaced over the opening of the engaging recess 51 cand comes into a state of being able to relatively come out downward. Therefore, the first movable stopper 51 is rotatable upward in the unlocking position.As shown in FIGS. 16 and 17, the first movable stopper 51 can be turned by 180 degrees left and right around the support shaft 57. As shown in FIGS. 18 and 19, in the left-hand-turned state of the first movable stopper 51, by loosening the rotation screw 56, the second movable stopper 52 can be slid leftward and moved to the return position. By moving the second movable stopper 52 to the retraction position, the height of the left stopper 50L of the positioning stopper 50 can be reduced to the height of the base portion 53.In addition, on the front surface of the swing support portion 45 supporting the tool main body portion 10, an illumination device 60 is provided that illuminates the part to be cut to facilitate the cutting work in the night or in the dark. Details of this lighting device 60 are shown in FIG. 20. As shown in FIG. 3, the lighting device 60 is mounted on a side that is further right than the saw blade 12 in front view and is the right front surface of the swing support portion 45. Thus, the lighting device 60 is disposed below the pivot point (pivot shaft 47) of the tool main body portion 10. The illumination device 60 illuminates the part to be cut (the cutting edge).As shown in FIG. 20, the lighting device 60 includes three LEDs 62 to 62 (light emitting diodes) as a light source. The three LEDs 62 to 62 are mounted on a control board 61. The three LEDs 62 to 62 are arranged in a circle at approximately equal intervals. In addition, the three LEDs 62 to 62 are arranged adjacently such that their emission directions are parallel to each other.Three LEDs 62 to 62 are accommodated inside the lighting case 63. On the front side of the lighting case 63, a transparent cover 64 is attached. The transparent cover 64 faces straight forward (toward the user). However, the transparent cover 64 faces slightly downward.As shown in FIG. 20, the emission direction of the three LEDs 62 to 62 is inclined downward as viewed from the side. The emission direction of the three LEDs 62 to 62 is inclined to the left in plan view. Therefore, in FIG. 20 (viewed from the right), the back side of the control board 61 is seen.Thus, by mounting the lighting device 60 offset rightward with respect to the saw blade 12 when viewed from the front and accommodating the three LEDs 62 to 62 in a position in which the emission direction thereof is inclined downward when viewed from the side and leftward when viewed from the front, the cutting edge of the saw blade 12 (the part to be cut) is illuminated with high efficiency. In the present embodiment, as shown in FIG. 6, in a state in which the tool main body portion 10 has been moved down to the lowest lowering end, assuming an imaginary horizontal plane V passing through the lower surface of the reduction gear portion 16, the emission direction of the three LEDs 62 to 62 is set to illuminate the cutting edge in an area S that is below the imaginary horizontal plane V and above the surface of the table 20.In the table cutting tool 1 having the above-described configuration, the positioning stopper 50 for positioning the cutting workpiece W on the table 20 includes the two movable stoppers 51 and 52 that can be moved between the use position and the retraction position. The first movable stopper 51 is provided rotatably up and down, while the second movable stopper 52 is provided slidably leftward and rightward.As shown in FIGS. 12 and 13, in the case of square cutting, when the saw blade 12 is disposed at a right angle with respect to the table surface, the first and second movable stoppers 51 and 52 can be respectively disposed at the use position. By disposing the first and second movable stoppers 51 and 52 in the use position, respectively, the left and right stoppers 50L, 50R can approach the saw blade 12 to the maximum, thereby enabling secure positioning of the cutting workpiece W and also enabling backward stiebling of saw chips and the like to be effectively prevented.As shown in FIGS. 14 and 15, when the first movable stopper 51 is slightly slid to the right and moved to the unlocking position, the engagement shaft portion 58 relatively slides in the engagement recess 51 cvia the opening, whereby the first movable stopper 51 becomes an upwardly rotatable state.By rotating the first movable stopper 51 upward around the support shaft 57 and turning it left and right as shown in FIGS. 16 and 17, the first movable stopper 51 can be moved to the retraction position. By moving the first movable stopper 51 to the retraction position in this manner, the saw blade 12 can perform a bevel cutting operation by being tilted leftward by, for example, 45°. The oblique cutting operation can be carried out while the second movable stop 52 is arranged in the position of use.Furthermore, as shown in FIGS. 18 and 19, after the first movable stopper 51 is moved to the return position, the second movable stopper 52 can be slid leftward and moved to the return position. By moving the second movable stopper 52 to the retraction position, the height of the left stopper 50R can be substantially reduced to the height of the base portion 53. In this state, as shown in FIGS. 8 and 9, the tool main body 10 can be moved leftward with an even greater inclination to perform the bevel cutting operation.In this way, the first movable stopper 51 can be moved to the retraction position in a state where the second movable stopper 52 is disposed in the use position. Thus, between a state in which only the first movable stopper 51 has been rotated upward and moved from the use position to the retraction position and a state in which both the first and second movable stoppers 51, 52 have been moved from the use position to the retraction position, it is possible to select such that the positioning surface is located at a position in close proximity to the saw blade 12 within a range in which no interference with the saw blade 12 or the tool main body portion 10 takes place, to perform the cutting processing.Various changes may be made to the above-described embodiments. In addition to the first and second movable stoppers 51, 52, for example, a configuration has been described in which a positioning surface 53 ais also provided on the base portion 53, but the positioning surface 53 aon the base portion 53 may be omitted. Also, one of the positioning surfaces 51 a, 52 aof the first and second movable stoppers 51, 52 may be omitted. As a function of the positioning stopper 50, in addition to the function of positioning the cutting workpiece W, a chip removing function is also conceivable for preventing chips or cut pieces from sting rearward, wherein a positioning surface is set on the front surface of the first or second movable stopper 51, 52 or the base portion 53, and otherwise a configuration for the above-mentioned chip removing function can be realized.As for the left stopper 50L, a configuration including the first and second movable stoppers 51, 52 has been described by way of example, but this configuration is also possible for the right stopper 50R, and the exemplary movable stoppers may be provided on both.

Claims

A table cutting apparatus (1) including a table (20) on which a material (W) to be cut by a rotary cutter (12) is placed, a tool main body (10) supported by the table (20), and a positioning stopper (50) for positioning the material (W) to be cut on a surface of the table (20) by bringing the material (W) to be cut placed on the table (20) into contact with the positioning stopper (50), wherein the positioning stopper (50) includes a base portion (53), a first movable stopper (51), and a second movable stopper (52), wherein the first and second movable stoppers (51, 52) are movable with respect to the base portion (53), each of the base portion (53), the first movable stopper (51) and the second movable stopper (52) include a positioning surface (51a, 52a, 53a) for positioning the material (W) to be cut on the surface of the table (20) by bringing the material (W) to be cut into contact with the positioning surface (51a, 52a, 53a), the first movable stopper (51) is rotatable independently of a movement of the second movable stopper (52), and the first movable stopper (51) is configured to be movably supported on the second movable stopper (52) such that the first movable stopper (51) (i) is displaceable in a left-right direction, and (ii) being rotatable up and down between a position between a side of the rotary blade (12) and the second movable stopper (52) and a position on a side of the second movable stopper (52) opposite to the rotary blade (12).The tabletop cutting device (1) according to claim 1, wherein the first movable stopper (51) is configured to be movably supported on the second movable stopper (52), and the first movable stopper (51) is moved to an unlocking position by slightly shifting toward the rotary knife (12) in the left-right direction, whereby the first movable stopper (51) comes into an upward rotatable state to be rotated to a retracting position.A table cutting apparatus (1) including a table (20) on which a material (W) to be cut by a rotary cutter (12) is placed, a tool main body (10) supported by the table (20), and a positioning stopper (50) for positioning the material (W) to be cut on a surface of the table (20) by bringing the material (W) to be cut placed on the table (20) into contact with the positioning stopper (50), wherein the positioning stopper (50) includes a base portion (53), a first movable stopper (51), and a second movable stopper (52), wherein the first and second movable stoppers (51, 52) are movable with respect to the base portion (53), each of the base portion (53), the first movable stopper (51) and the second movable stopper (52) have a positioning surface (51a, 52a, 53a) for positioning the material (W) to be cut on the surface of the table (20) by bringing the material (W) to be cut into contact with the positioning surface (51a, 52a, 53a), the first movable stopper (51) is rotatable independently of a movement of the second movable stopper (52), and the first movable stopper (51) is configured to be movably supported on the second movable stopper (52), and the first movable stopper (51) is moved to an unlocking position by slightly shifting toward the rotary cutter (12) in a left-right direction, thereby bringing the first movable stopper (51) into an upward rotatable state, to be rotated into a return position.The tabletop cutting device (1) according to claim 3, wherein the first movable stopper (51) is configured to be movably supported on the second movable stopper (52) such that the first movable stopper (51) is (i) slidable in the left-right direction, and (ii) rotatable up and down between a position between a side of the rotary blade (12) and the second movable stopper (52) and a position on a side opposite to the rotary blade (12) of the second movable stopper 852).The tabletop cutting device (1) according to any one of claims 1 to 4, wherein the second movable stopper (52) is supported to be slidable in the right and left directions with respect to the base portion (53).The tabletop cutting device (1) according to any one of claims 1 to 5, wherein the second movable stopper (52) is directly supported by the base portion (53).The tabletop cutting device (1) according to any one of claims 1 to 6, wherein the second movable stopper (52) is supported above the base portion (53).The tabletop cutting device (1) according to any one of claims 1 to 7, wherein the second movable stopper (52) is configured to be movable to a retracted position such that the second movable stopper (52) is not located above the first movable stopper (51).

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