Bench cutter

Abstract

To provide a bench cutter capable of suppressing twisting of a plurality of slide bars and keeping a state where the plurality of slide bars extend in parallel.SOLUTION: A bench cutter 1 comprises: a turn table on which a material to be cut is loaded; a first slide bar 42 and a second slide bar 43 supported by the turntable and extending in parallel in a sliding direction; a cutter body supported by the first slide bar 42 and the second slide bar 43 and movable in the sliding direction with respect to the turntable; and an electric motor housed in the cutter body, which is a driving source of a blade tool cutting the material to be cut. The bench cutter 1 has a first clamping member 51 abutting each of tip parts 42a, 43a at positions apart from each of base end parts. The bench cutter 1 has a second clamping member 52 facing the first clamping member 51 in a direction orthogonal to the sliding direction and clamping the first slide bar 42 and the second slide bar 43 in cooperation with the first clamping member 51.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a bench cutter used for cutting a material to be cut, such as wood. [Background technology]

[0002] This type of bench cutter has, for example, a table on which the material to be cut is placed, a slide bar that is supported by the table and extends in the front-rear direction, and a swinging support member that is attached to the slide bar and can move along the slide bar. A cutting machine body is attached to the swinging support member so that it can swing up and down. A roughly disk-shaped cutting tool that rotates using an electric motor as a power source is attached to the cutting machine body. The cutting tool is rotated and the cutting machine body is moved downward toward the material to be cut that is placed on the table below. This causes the cutting tool to cut into the material to be cut. Furthermore, the cutting machine body is moved together with the swinging support member along the extension direction of the slide bar. This causes the cutting tool to move horizontally along the extension direction of the slide bar to cut the material to be cut.

[0003] A plurality of slide bars, for example two, are provided to support the cutting machine body so that it can move in the sliding direction. In order to move the cutting machine body smoothly in the sliding direction, the plurality of slide bars extend in parallel. Patent Document 1 describes a holder that holds the tips of two slide bars extending in parallel. FIG. 16 shows a holder 101 described in Patent Document 1 (reference numbers have been renumbered). The holder 101 is provided with two circular insertion holes into which cylindrical slide bars 102, 103 can be inserted. The holder 101 is provided with screw holes that are perpendicular to each insertion hole and communicate with each insertion hole. The tips of the two slide bars 102, 103 are inserted into each insertion hole. As a result, the tips of the two slide bars 102, 103 are held with a predetermined pitch between them.

[0004] Set screws 104, 105 are attached to the screw holes of the holder 101. The tip of each slide bar 102, 103 is pressed in the radial direction by fastening the set screws 104, 105. This prevents the tip of each slide bar 102, 103 from rotating around its axis. The base ends of the two slide bars 102, 103 are press-fitted into insertion holes of a support arm provided at the rear of the cutting machine body. Therefore, the base ends of the two slide bars 102, 103 are held with a predetermined pitch between them and are prevented from rotating around their axis. Thus, the two slide bars 102, 103 extend parallel to each other with their base ends held by the support arm and their tip ends held by the holder 101.

[0005] When the cutting machine body is in an inclined position and a load is applied from above by hand to move the cutting machine body downward, a torsional load may be applied to the slide bars 102, 103. Only the fastening force of the set screws 104, 105 is applied to the slide bars 102, 103 as a force to counter the torsional load. Therefore, when the torsional load exceeds the fastening force of the set screws 104, 105, the tip of the set screws 104, 105 slips against the surface of the tip of the slide bars 102, 103. For example, when a rotational force R1 is generated around the axis of the lower slide bar 103, the upper slide bar 102 moves in a direction F1 approximately to the right. At this time, the holder 101 rotates around the axis of the lower slide bar 103 due to the rotational force R1. On the other hand, the upper slide bar 102 does not rotate much and moves approximately parallel to the right. As a result, the tip of the set screw 104 slips against the upper slide bar 102 and is unable to resist the load. At this time, the lower slide bar 103 rotates and twists relative to the upper slide bar 102. This twist is a dynamic twist that occurs in the two slide bars 102, 103 only when the user applies a load.

[0006] Patent Document 2 describes a bar holder that holds the tips of two slide bars in a manner different from that of Patent Document 1. The bar holder described in Patent Document 2 is shown in FIGS. 17 and 18 (reference numerals have been renumbered). The bar holder has a rectangular flat connecting plate 111. A flat portion extending in the axial direction is provided at the tip of each of the slide bars 112 and 113. The flat portion of each of the slide bars 112 and 113 is abutted against one flat surface of the connecting plate 111. The tips of each of the slide bars 112 and 113 and the connecting plate 111 are fixed by bolts 114 and 115, respectively. Therefore, the tips of the two slide bars 112 and 113 are held with a predetermined pitch between them and rotation around the axis is suppressed.

[0007] The slide bars 112, 113 are assembled by first pressing the base end of each slide bar 112, 113 into the support arm to fix it, and then fastening the tip end of each slide bar 112, 113 to the connecting plate 111. When the base end of each slide bar 112, 113 is pressed into the support arm, the flat surfaces provided at the tip end of each slide bar 112, 113 may not be flush. In a state where the flat surfaces are not flush, the tip end of each slide bar 112, 113 and the connecting plate 111 are fastened by the bolts 114, 115. At this time, the axial force of the bolt 114 fastened to the slide bar 112 also acts on the slide bar 113, and the axial force of the bolt 115 fastened to the slide bar 113 also acts on the other slide bar 112. As a result, a load is applied to the tip end of each slide bar 12, 113 so that the non-flush flat surfaces become flush following the connecting plate 111. When the load is large, the tips of the two slide bars 112, 113 cannot maintain their parallel state and twist. For example, when a load R2 occurs that tilts the flat surface of the lower slide bar 113 and rotates it around its axis, the upper slide bar 112 moves in a direction F2 approximately to the right. This twist is a static twist that is permanently maintained by the assembly of the parts, regardless of the load applied by the user.

[0008] As described above, in the conventional structure for holding the tips of the multiple slide bars, there was room for various improvements in order to suppress twisting of the multiple slide bars and make the multiple slide bars parallel. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2015-16514 A [Patent Document 2] Japanese Patent Application Publication No. 9-1502 Summary of the Invention [Problem to be solved by the invention]

[0010] Therefore, there is a need for a bench cutter that can suppress twisting of the multiple slide bars and maintain the multiple slide bars extended in parallel. [Means for solving the problem]

[0011] According to one feature of the present disclosure, a bench cutter has a table on which a workpiece is placed. The bench cutter has first and second slide bars supported on the table and extending parallel to each other in a sliding direction. The bench cutter has a cutting machine body supported on the first and second slide bars and movable in the sliding direction relative to the table. The bench cutter has an electric motor housed in the cutting machine body and serving as a drive source for a cutting tool for cutting the workpiece. The bench cutter has a first clamping member that abuts against each tip of the first and second slide bars at a position away from each base end of the first and second slide bars supported on the table. The bench cutter has a second clamping member that faces the first clamping member in a direction perpendicular to the sliding direction and cooperates with the first clamping member to clamp the first and second slide bars.

[0012] Therefore, the first and second slide bars are held by the first and second clamping members working together to clamp the respective tips. Therefore, the first and second slide bars are not fixed to either the first or second clamping members. Therefore, it is possible to suppress the occurrence of a load on the second slide bar due to the clamping force acting on the first slide bar. It is possible to suppress the occurrence of a load on the first slide bar due to the clamping force acting on the second slide bar. This makes it possible to suppress the occurrence of twisting in the first and second slide bars, both due to dynamic twisting caused by a load applied by the user and static twisting that is permanently maintained. Thus, it is possible to maintain the state in which the first and second slide bars extend parallel to each other. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a bench cutter according to a first embodiment of the present disclosure. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a right side view of the bench cutter with the cutter body positioned forward and at the top dead center. [Figure 4] FIG. 2 is a right side view of the bench cutter with the cutter body located at the rear and at the top dead center. [Diagram 5] FIG. 2 is a right side view of the bench cutter with the cutter body located at the rear and at the bottom dead center. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 2 is a perspective view of a slide bar and a bar holder. [Figure 11] FIG. 4 is an exploded perspective view of the slide bar and the bar holder. [Figure 12] 13 is a perspective view of the second clamping member as seen from the rear. FIG. [Figure 13] 7 is a cross-sectional view taken along line XIII-XIII in FIG. 6. [Figure 14] 13 is a longitudinal sectional view of a bar holding portion according to a second embodiment taken along line XIII-XIII in FIG. 6. [Figure 15] FIG. 13 is a perspective view of a slide bar and a bar holder according to a third embodiment of the present disclosure. [Figure 16] FIG. 1 is a schematic front view of the structure of a slide bar in Patent Document 1. [Figure 17] FIG. 1 is a schematic front view of the structure of the slide bar of Patent Document 2 rotated by 90 degrees. [Figure 18] FIG. 13 is a schematic front view showing a state in which a connecting plate is slightly rotated by 90 degrees with respect to the slide bar structure of Patent Document 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] According to another feature of the present disclosure, the bench cutter has a fastener that fixes the first clamping member and the second clamping member at a position separated from the first and second slide bars. Therefore, the fastener is not directly fastened to the first slide bar or the second slide bar. This makes it possible to prevent the fastening force of the fastener from acting on the first slide bar and the second slide bar. This makes it possible to prevent the first slide bar and the second slide bar from being subjected to a load that would cause them to twist relative to each other.

[0015] According to another feature of the present disclosure, the fastener is located between the first and second slide bars. Therefore, the first and second slide bars can be clamped between the first clamping member and the second clamping member with a small number of fasteners. This allows the structure for clamping the first and second slide bars to be made compact. In addition, the number of parts can be reduced, thereby suppressing manufacturing costs.

[0016] According to another feature of the present disclosure, the first clamping member and the second clamping member can be fixed with a single fastener, so that the first and second slide bars can be clamped by the first clamping member and the second clamping member while minimizing the number of fasteners.

[0017] According to another feature of the present disclosure, the fastener is a bolt, and therefore, by providing a simple structure for clamping the first and second slide bars, the workability of the assembly work can be improved.

[0018] According to another feature of the present disclosure, the second clamping member has a pitch regulating portion that abuts against the tip ends of the first and second slide bars and regulates the pitch of the first and second slide bars. This makes it possible to suppress relative radial movement of the first and second slide bars. This makes it easier to maintain the state in which the first and second slide bars extend parallel to each other. This allows the cutting machine body to move smoothly in the sliding direction.

[0019] According to another feature of the present disclosure, the pitch restricting portion of the second clamping member includes first and second insertion holes into which the tip ends of the first and second slide bars are inserted, respectively. Therefore, by providing the pitch restricting portion that restricts the pitch of the first and second slide bars with a simple structure, it is possible to improve the workability of the assembly work.

[0020] According to another feature of the present disclosure, the first clamping member is rod-shaped and has flat surfaces that come into contact with the tips of the first and second slide bars, thereby making it possible to precisely prevent the tips of the first and second slide bars from rotating about their axes.

[0021] According to another feature of the present disclosure, the first clamping member is rod-shaped with a curved outer circumferential surface, which reduces the number of processing steps for the first clamping member, thereby reducing manufacturing costs.

[0022] According to another feature of the present disclosure, the first clamping member is made of steel. Therefore, the first clamping member can be made of a material with high rigidity. Therefore, the load that would cause the tips of the first and second slide bars to twist relative to each other can be accurately suppressed.

[0023] According to another feature of the present disclosure, the second clamping member is made of a light metal, which allows the second clamping member to be made of a material that is easy to process, thereby reducing manufacturing costs.

[0024] According to another feature of the present disclosure, a bench cutter has a table on which a workpiece is placed. The bench cutter has first and second slide bars supported on the table and extending parallel to each other in a sliding direction. The bench cutter has a cutting machine body supported on the first and second slide bars and movable in the sliding direction relative to the table. The bench cutter has an electric motor housed in the cutting machine body and serving as a drive source for a cutting tool that cuts the workpiece. The bench cutter has a holder that holds each tip of the first and second slide bars. The bench cutter has a rotation restricting member that is attached to the holder at a position separate from the first and second slide bars and abuts against each tip of the first and second slide bars to restrict rotation of each tip around its axis.

[0025] Therefore, the rotation restricting member restricts the rotation of each tip of the first and second slide bars around the axis. However, the rotation restricting member prevents the occurrence of a load that would rotate each tip of the first and second slide bars around the axis. The holder holds each tip of the first and second slide bars. However, the holder prevents the occurrence of a load that would rotate each tip of the first and second slide bars around the axis. Therefore, it is possible to prevent the tips of the first and second slide bars from twisting relative to each other. This makes it possible to maintain a state in which the first and second slide bars extend parallel to each other.

[0026] A first embodiment of the present disclosure will be described with reference to Figs. 1 to 13. In this embodiment, a bench cutter 1, which is a so-called sliding circular saw, is illustrated. As shown in Fig. 1, the bench cutter 1 has a base 2 placed on a table or floor, a turntable 4 for placing a material to be cut, and a cutter body 10 located above the turntable 4. The turntable 4 is supported above the base 2. The turntable 4 can rotate horizontally around a table rotation support shaft 2a extending in the vertical direction. A substantially disk-shaped cutting tool (circular saw blade) 11, which is called a tipped saw blade, is rotatably supported on the cutter body 10. A user performs cutting work by positioning himself in front of the bench cutter 1. In the following description, the front side is the front side as seen from the user. The up, down, left, and right directions are defined based on the user.

[0027] As shown in Figures 1 and 6, the table top surface 4a of the turntable 4 is substantially circular in plan view and extends horizontally. The table rotation support shaft 2a is located in the center of the substantially circular plate shape of the turntable 4. The base 2 has auxiliary tables 3 on both the left and right sides of the turntable 4, which are at the same top surface height as the table top surface 4a. The turntable 4 has a table extension 5 that extends forward along the side surface of the cutting tool 11. A cutting edge plate 5a is provided on the top surfaces of the turntable 4 and the table extension 5. A notched groove 5b extending along the side surface of the cutting tool 11 is provided in the center of the cutting edge plate 5a.

[0028] As shown in Fig. 2, an adjustment bolt 67 is provided at the bottom of the table extension 5 to support the table extension 5 from below. The adjustment bolt 67 is supported by the table extension 5 and can be moved up and down by screwing. By moving the adjustment bolt 67 up and down, the lower end of the adjustment bolt 67 comes into contact with the installation surface. This allows the height of the table extension 5 to be adjusted. Also, any looseness in the installation of the table extension 5 can be eliminated.

[0029] 1 and 6, a wall-shaped positioning fence 6 that extends left-right and upward is provided above the turntable 4 and auxiliary table 3. The positioning fence 6 is supported by the left and right auxiliary tables 3. A positioning surface 6a, which is the front surface of the positioning fence 6, is located on a vertical plane that passes through the table rotation support shaft 2a. The workpiece placed on the turntable 4 is positioned in the front-rear direction by abutting it against the positioning surface 6a.

[0030] As shown in Figs. 1 to 3, a miter scale plate 7 having a circular arc shape extending horizontally is provided in a region of approximately half the circumference of the front part of the base 2. The miter scale plate 7 indicates the rotation angle (miter angle) of the turntable 4 in cooperation with indicators 8 provided on the left and right sides of the turntable 4. The miter angle is the angle formed by the side of the cutting tool 11 and the positioning surface 6a of the positioning fence 6. By rotating the turntable 4 to the left or right, the cutting tool 11 can be placed in an oblique position with respect to the positioning surface 6a of the positioning fence 6. Cutting the workpiece in this position is called an oblique cut (English name: miter cut). The miter scale plate 7 is provided with a plurality of groove-shaped positioning recesses 7b extending radially inward. The positioning recesses 7b are provided at predetermined angular intervals in the circumferential direction of the miter scale plate 7. The tip of a positioning pin 66a described later can enter the positioning recesses 7b. The miter scale plate 7 is fixed to the base 2 by a plurality of fixing screws 7a. The fixing screws 7a are inserted into long holes that penetrate the miter scale plate 7 in the vertical direction. The miter angle can be finely adjusted by loosening the fixing screws 7a and moving the miter scale plate 7 left and right. For example, when the positioning pin 66a is inserted into the positioning recess 7b at the right angle position, the miter angle can be precisely adjusted to a right angle. This adjustment is mainly performed during the production process of the product.

[0031] 1 to 3, a substantially cylindrical arm support part 4b with its axial direction extending in the front-rear direction is provided at the rear of the turntable 4. A support arm 40 extending substantially upward is provided behind the arm support part 4b. The support arm 40 is supported so as to be tiltable in the left-right direction relative to the arm support part 4b about a left-right tilting support shaft 40a extending in the front-rear direction.

[0032] 2 and 8, a maximum tilt angle switching lever 47 is provided on the lower rear of the support arm 40. By rotating the maximum tilt angle switching lever 47, the maximum tilt angle of the support arm 40 around the left-right tilt support shaft 40a can be changed, for example, from 45° to 46°. By tilting the cutting tool 11 left and right, a so-called bevel cut can be performed on the workpiece placed on the turntable 4.

[0033] As shown in FIGS. 3 and 4, a plurality of slide bars 41 extending in the front-rear direction parallel to the side surface of the cutting tool 11 are attached to the upper part of the support arm 40. The slide bar 41 is provided in a long cylindrical shape. The plurality of slide bars 41 include a first slide bar 42 on the upper side and a second slide bar 43 on the lower side. The first slide bar 42 has a tip portion 42a at the front end and a base portion 42c at the rear end. The second slide bar 43 has a tip portion 43a at the front end and a base portion 43c at the rear end. The base portion 42c of the first slide bar 42 is press-fitted into an insertion hole 40b provided in the support arm 40. The base portion 43c of the second slide bar 43 is press-fitted into an insertion hole 40c provided below the insertion hole 40b in the support arm 40. The tip portion 42a of the first slide bar 42 and the tip portion 43a of the second slide bar 43 are held by the bar holding portion 50. The first slide bar 42 and the second slide bar 43 extend parallel to each other and are held by the support arm 40 and the bar holder 50. The bar holder 50 will be described in detail later.

[0034] As shown in Figs. 4 and 5, the swing support member 44 is attached to the first slide bar 42 and the second slide bar 43 so as to be slidable in the front-rear direction. The bar attachment portion 44c of the swing support member 44 is provided with through holes through which the first slide bar 42 and the second slide bar 43 can be inserted. Bearings are interposed between each through hole of the bar attachment portion 44c and each slide bar 41. This allows the swing support member 44 to slide in the front-rear direction in which the first slide bar 42 and the second slide bar 43 extend. By sliding the swing support member 44 in the front-rear direction, for example, a wide workpiece placed on the turntable 4 can be cut. The bar attachment portion 44c is provided with a knob 44d that can be rotated. By rotating the knob 44d in the tightening direction, the swing support member 44 can be fixed at a predetermined front-rear position relative to the first slide bar 42 and the second slide bar 43.

[0035] As shown in Figs. 3, 6 and 7, the cutting machine body 10 is connected to the swing support member 44 to the left of the bar mounting portion 44c. The first slide bar 42 and the second slide bar 43 are located to the right of the cutting machine body 10 when the cutting tool 11 is vertical. The cutting machine body 10 can swing up and down relative to the swing support member 44 around a vertical swing support shaft 10a extending in the left and right direction. The vertical swing support shaft 10a is located behind the cutting tool 11. The cutting tool 11 is attached integrally to an output shaft 24 that extends in the left and right direction and is rotatably supported by the cutting machine body 10. The cutting machine body 10 can be swung downward to cause the cutting tool 11 to cut into the workpiece placed on the turntable 4.

[0036] As shown in Figs. 1 and 2, the cutting machine body 10 has a fixed cover 12 and a movable cover 13 that cover the cutting tool 11. The fixed cover 12 covers the upper half of the cutting tool 11 from both the left and right sides and from the radially outward direction. A white arrow 12a indicating the rotation direction of the cutting tool 11 is displayed on the left side of the fixed cover 12. The movable cover 13 can cover the lower half of the cutting tool 11. The movable cover 13 rotates in conjunction with the up and down swing of the cutting machine body 10 to open and close the lower half of the cutting tool 11. When the cutting machine body 10 is swung upward, the movable cover 13 rotates in the closed position direction (clockwise direction in Fig. 2). When the cutting machine body 10 is located at the top dead center, the lower half of the cutting tool 11 is covered. When the cutting machine body 10 is swung downward, the movable cover 13 rotates in the open position direction (counterclockwise direction in Fig. 2). Therefore, a lower half of the circumference of the cutting tool 11 is exposed, and the exposed area of ​​the cutting tool 11 can be made to cut into the workpiece placed on the turntable 4.

[0037] As shown in Figures 5 and 8, a bottom dead center stopper 16 is provided at the rear of the cutting machine body 10. The bottom dead center stopper 16 is composed of a bolt that is screwed to the cutting machine body 10 and protrudes downward. The swing support member 44 is provided with a flat bottom dead center stopper abutment portion 44a facing upward. When the cutting machine body 10 swings downward, the bottom dead center stopper 16 abuts against the bottom dead center stopper abutment portion 44a, thereby stopping the downward movement of the cutting machine body 10 at the bottom dead center. The downward protruding length of the bottom dead center stopper 16 can be changed, for example, by inserting a hexagonal wrench into the hexagonal hole in the head of the bottom dead center stopper 16 and rotating it. This allows fine adjustment of the bottom dead center position of the cutting machine body 10.

[0038] As shown in Figures 3 and 4, a top dead center stopper 17 that protrudes to the right is provided on the right side of the fixed cover 12. The top dead center stopper 17 is provided below the bottom dead center stopper 16. The top dead center stopper 17 is formed of a rubber sleeve and is screwed to the fixed cover 12. The swing support member 44 has a flat top dead center stopper abutment portion 44b that faces forward and downward below the bottom dead center stopper abutment portion 44a. When the cutting machine body 10 swings upward, the top dead center stopper 17 abuts against the top dead center stopper abutment portion 44b, thereby stopping the upward movement of the cutting machine body 10 at the top dead center.

[0039] 1 and 2, a bottom dead center lock pin 46 extending leftward is provided on the left side surface of the front part of the swing support member 44. The bottom dead center lock pin 46 is movable in the left and right directions. The fixed cover 12 is provided with a through hole into which the bottom dead center lock pin 46 can enter when the cutting machine body 10 moves to the bottom dead center. The left end of the bottom dead center lock pin 46 is pressed to move it to the right, and the bottom dead center lock pin 46 enters the through hole of the fixed cover 12, thereby locking the cutting machine body 10 at the bottom dead center.

[0040] 6 and 7, the cutting machine body 10 has a motor housing 20 to the right of the fixed cover 12 and to the left of the slide bar 41. The motor housing 20 accommodates an electric motor 21. A motor called a DC brushless motor is used as the electric motor 21. The motor shaft of the electric motor 21 extends in the front-rear direction along a motor axis J that is parallel to the side surface of the cutting tool 11.

[0041] 6, a gear housing 22 is connected to the front part of the motor housing 20 in the extending direction of the motor axis line J. The gear housing 22 accommodates a reduction gear train 23 that reduces the rotational power of the electric motor 21 and transmits it to an output shaft 24.

[0042] As shown in Figs. 3 to 5, a rectangular box-shaped controller housing 25 is provided at the upper rear of the motor housing 20. The controller housing 25 houses a controller 26 that mainly controls the operation of the electric motor 21. The controller 26 has a shallow, approximately rectangular parallelepiped case and a control board that is housed in the case and molded with resin. The control board is equipped with a control circuit having a microcomputer that transmits control signals to the electric motor 21, and a drive circuit having an FET that switches the current of the electric motor 21 based on a signal received from the control circuit. The control board also is equipped with an auto-stop circuit that cuts off the power supply to the electric motor 21 according to the detection result of the state of the battery 28 to prevent over-discharge or over-current.

[0043] As shown in Figs. 3 to 5, a battery mounting section 27 is provided at the rear of the controller housing 25. The mounting surface of the battery mounting section 27 faces rearward and extends generally vertically when the cutting machine body 10 is located at the top dead center. A substantially rectangular box-shaped battery 28 can be attached to the battery mounting section 27 by sliding it from top to bottom. The battery 28 can be removed from the battery mounting section 27 by sliding it from bottom to top. The battery 28 is, for example, a lithium-ion battery with an output voltage of 36V. The battery 28 can be removed from the battery mounting section 27 and repeatedly charged using a separately prepared charger. The battery 28 can be used as a power source for other rechargeable power tools such as a screwdriver or an electric drill.

[0044] As shown in Figs. 3 and 7, the cutting machine body 10 has a handle section 30. A loop-shaped operating handle 31 is provided on the front of the handle section 30. The operating handle 31 is provided to the right of the fixed cover 12 and to the left of the slide bar 41. A switch lever 32 is provided on the inner circumference of the operating handle 31. A user can pull the switch lever 32 with his or her finger while holding the operating handle 31. Pulling the switch lever 32 starts the electric motor 21 and rotates the blade 11. A lock-off button 33 is provided on the front of the operating handle 31. When the lock-off button 33 is not pressed, the switch lever 32 is in a locked state. Pressing the lock-off button 33 enables the switch lever 32 to be pulled. This prevents the electric motor 21 from being started unintentionally.

[0045] 1, 2 and 6, the handle unit 30 has a loop-shaped carrying handle 34 behind the operating handle 31. The carrying handle 34 is connected to the left side of the fixed cover 12 and the left side of the controller housing 25. The carrying handle 34 extends roughly horizontally in the front-to-rear direction when the cutting machine body 10 is moved to the bottom dead center. With the cutting machine body 10 locked at the bottom dead center by the bottom dead center lock pin 46, the user can carry the bench cutter 1 by gripping the carrying handle 34.

[0046] As shown in Fig. 3, switches 35 and 36 are provided on the right side of the operation handle 31. Pressing switch 35 can turn on and off the laser light of a laser irradiator 37 (see Fig. 7) for aligning corner lines. Pressing switch 36 can turn on and off the light emitted by an illuminator 38 provided above the cutting machine body 10. The illuminator 38 is supported by an arm 38a extending leftward from the top of the operation handle 31. The illuminator 38 illuminates the periphery of the cutting area of ​​the blade 11.

[0047] As shown in FIGS. 1 and 2, a turntable fixing mechanism 60 is provided at the bottom of the table extension 5. A grip portion 61 is provided at the front of the table extension 5. A user can grasp the grip portion 61 to rotate the turntable 4 horizontally relative to the base 2. A fixed rod 62 extends in the front-rear direction from the grip portion 61 toward the rear inside the table extension 5. A user can grasp the grip portion 61 to rotate it around its axis. When the grip portion 61 is rotated around its axis, the fixed rod 62 is displaced in the front-rear direction. The turntable 4 can be positioned at any miter angle relative to the base 2 by displacing the fixed rod 62 rearward to engage the rear end with the base 2. The positioning of the turntable 4 at any miter angle can be released by displacing the fixed rod 62 forward.

[0048] As shown in FIGS. 2 and 9, a positive lock mechanism 65 is provided at the bottom of the table extension 5. By using the positive lock mechanism 65, the turntable 4 can be positioned at a predetermined miter angle corresponding to the positioning recess 7b of the miter scale plate 7. The positive lock mechanism 65 has an unlocking lever 66 and a positioning pin 66a. The unlocking lever 66 is provided behind the grip portion 61 at the front of the table extension 5. The positioning pin 66a extends in the front-rear direction along the longitudinal direction of the table extension 5 at the bottom of the table extension 5. The positioning pin 66a is supported by a pin support portion 66c at approximately the same height as the miter scale plate 7 so as to be movable in the front-rear direction. The positioning pin 66a is urged rearward by a compression spring 66b provided in front of the pin support portion 66c.

[0049] As shown in FIGS. 2 and 9, the front part of the positioning pin 66a is connected to the unlocking lever 66. Inside the pin support part 66c, a lead surface is provided to convert the rotation of the positioning pin 66a into forward and backward movement of the positioning pin 66a. When the unlocking lever 66 is pressed downward, the positioning pin 66a rotates, and the rotation is converted into forward movement of the positioning pin 66a by the pin support part 66c. The positioning pin 66a moves forward against the biasing force of the compression spring 66b. The rear end of the positioning pin 66a that has moved forward is located outside the positioning recess 7b and is not engaged with the positioning recess 7b. Therefore, when the positioning of the turntable 4 is released, the turntable 4 can be freely rotated in the left and right directions by gripping the grip part 61. When the unlocking lever 66 is raised upward, the positioning pin 66a moves backward by the biasing force of the compression spring 66b. The rear end of the positioning pin 66a that has moved backward abuts against the outer periphery of the miter scale plate 7. When the turntable 4 is rotated horizontally by holding the grip portion 61, the positioning pin 66a enters one of the positioning recesses 7b provided on the outer periphery of the miter scale plate 7. Thus, the turntable 4 is positioned at a predetermined miter angle corresponding to the positioning recess 7b.

[0050] As shown in Figs. 2 and 9, a tilting and fixing mechanism 70 is provided at the front of the table extension 5 to hold the support arm 40 in a position so that it can tilt left and right. The tilting and fixing mechanism 70 has a tilting and fixing operation part 71, a reduction gear part 72, and a transmission shaft 73. The tilting and fixing operation part 71 is provided between the grip part 61 and the front end of the table extension 5. The tilting and fixing operation part 71 can rotate around an axis coaxial with the grip part 61. The rotational power of the tilting and fixing operation part 71 is transmitted to the transmission shaft 73 via the reduction gear part 72 provided at the lower part of the table extension 5. The transmission shaft 73 extends in the front-rear direction below the table extension 5 and the turntable 4. The transmission shaft 73 is connected to the lower part of the support arm 40. The transmission shaft 73 has a thrust needle bearing for generating an axial force at the boundary position between the arm support part 4b and the support arm 40. When the tilt fixation operation unit 71 is rotated to rotate the transmission shaft 73 in the tightening direction, the arm support unit 4b and the support arm 40 are fastened in the front-rear direction by the axial force. As a result, the support arm 40 is positioned at a predetermined left-right tilt angle relative to the arm support unit 4b. When the tilt fixation operation unit 71 is rotated to rotate the transmission shaft 73 in the loosening direction, the axial force is released and the fastened state between the arm support unit 4b and the support arm 40 is released. As a result, the support arm 40 becomes able to tilt left and right around the axis of the left-right tilt support shaft 40a.

[0051] As shown in Figs. 3, 11, and 13, the tip 42a of the first slide bar 42 and the tip 43a of the second slide bar 43 are provided in a substantially cylindrical shape. The second slide bar 43 is provided with an outer diameter slightly larger than that of the first slide bar 42. Therefore, the tip 43a of the second slide bar 43 is provided with an outer diameter slightly larger than that of the tip 42a of the first slide bar 42. The axis of the first slide bar 42 and the axis of the second slide bar 43 coincide in the left-right direction. That is, the axis of the first slide bar 42 and the axis of the second slide bar 43 extend on the same vertical plane. The tip 42a of the first slide bar 42 is provided with a flat portion 42b extending in the axial direction (front-rear direction). The tip 43a of the second slide bar 43 is provided with a flat portion 43b extending in the axial direction (front-rear direction). The flat surfaces 42b, 43b extend vertically and are aligned flush with each other when the first slide bar 42 and the second slide bar 43 are press-fitted into the support arm 40. The flat surfaces 42b, 43b are parallel to a vertical plane.

[0052] As shown in FIGS. 10 and 11, the bar holding section 50 has a first clamping member 51 and a second clamping member 52 that clamp the first slide bar 42 and the second slide bar 43 in the left-right direction. The first clamping member 51 is located on the left side, and the second clamping member 52 is located on the right side. The first clamping member 51 is made of steel and has a rectangular rod shape (square pillar shape) with the longitudinal direction being the up-down direction. The first clamping member 51 has a flat surface 51a that extends in the up-down direction. A circular through hole 51b is provided in the center of the first clamping member 51 in the up-down direction, penetrating the first clamping member 51 in the direction perpendicular to the flat surface 51a.

[0053] As shown in Figs. 11 to 13, the second clamping member 52 is made of a light metal such as aluminum or magnesium. The second clamping member 52 is formed in a generally oval cylindrical shape that is long in the vertical direction when viewed from the front. A first insertion hole 52b formed in a circular recess is provided in the upper rear surface of the second clamping member 52. The inner diameter of the first insertion hole 52b is approximately the same as or slightly larger than the outer diameter of the tip end 42a of the first slide bar 42. The tip end 42a of the first slide bar 42 is inserted into the first insertion hole 52b by intermediate fit, interference fit, or clearance fit. A second insertion hole 52c formed in a circular recess is provided in the lower rear surface of the second clamping member 52. The inner diameter of the second insertion hole 52c is approximately the same as or slightly larger than the outer diameter of the tip end 43a of the second slide bar 43. The tip portion 43a of the second slide bar 43 is inserted into the second insertion hole 52c with an intermediate fit, an interference fit, or a clearance fit.

[0054] 12 and 13, the second clamping member 52 has a pitch restricting portion 52a between the first insertion hole 52b and the second insertion hole 52c in the front-rear direction. A plurality of ribs for suppressing deformation are provided inside the pitch restricting portion 52a. The pitch restricting portion 52a restricts the relative radial movement of the tip end 42a of the first slide bar 42 inserted in the first insertion hole 52b and the tip end 43a of the second slide bar 43 inserted in the second insertion hole 52c.

[0055] 12 and 13, a flat surface 52d extending in the up-down and front-rear directions is provided at the left end of the pitch restricting portion 52a. The flat surface 52d is located slightly to the left of the flat surface 42b of the first slide bar 42 and the flat surface 43b of the second slide bar 43. A screw hole 52e extending perpendicular to the surface of the flat surface 52d is provided in the flat surface 52d. The screw hole 52e is located midway between the first insertion hole 52b and the second insertion hole 52c in the up-down direction.

[0056] As shown in Figs. 11 and 13, the bar holder 50 has a bolt 53 for fastening the first clamping member 51 and the second clamping member 52 in the left-right direction. The bolt 53 has a head 53a with a hexagonal hole that can be rotated around its axis with a wrench or the like, and a male screw 53b. The male screw 53b is inserted from left to right through the through hole 51b of the first clamping member 51, and is further fastened to the screw hole 52e of the second clamping member 52 arranged on the right. The flat surface 51a of the first clamping member 51 and the flat surface portion 52d of the second clamping member 52 face each other in a parallel positional relationship with a small gap therebetween. Fastening the bolt 53 causes the second clamping member 52 to bend slightly. As a result, the flat surface 51a of the first clamping member 51 and the flat surface portion 52d of the second clamping member 52 are slightly closer to each other, and are firmly integrated through the abutting slide bars 42, 43. That is, the four parts, ie, first clamping member 51, slide bars 42 and 43, and second clamping member 52, are integrated together.

[0057] As shown in FIG. 13, the tip 42a of the first slide bar 42 is inserted into the first insertion hole 52b of the second holding member 52, so that movement other than rotation about the axis is suppressed. At least a part of the flat surface portion 42b of the first slide bar 42 can abut against the flat surface 51a of the first holding member 51. This suppresses the tip 42a of the first slide bar 42 from rotating about the axis relative to the second slide bar 43 (dynamic twisting). The axial force of the bolt 53 acts between the first holding member 51 and the second holding member 52, and does not directly act on the tip 42a of the first slide bar 42. Therefore, the generation of a load that rotates the tip 42a of the first slide bar 42 about the axis (static twisting) is suppressed.

[0058] As shown in FIG. 13, the tip 43a of the second slide bar 43 is inserted into the second insertion hole 52c of the second clamping member 52, so that movement other than rotation around the axis is suppressed. At least a part of the flat surface portion 43b of the second slide bar 43 can abut against the flat surface 51a of the first clamping member 51. This suppresses the tip 43a of the second slide bar 43 from rotating around the axis relative to the first slide bar 42 (dynamic twisting). The axial force of the bolt 53 acts between the first clamping member 51 and the second clamping member 52, and does not directly act on the tip 43a of the second slide bar 43. Therefore, the generation of a load that rotates the tip 43a of the second slide bar 43 around the axis (static twisting) is suppressed.

[0059] As described above, the bench cutter 1 has a turntable 4 on which a material to be cut is placed, as shown in Figs. 3 and 6. The bench cutter 1 has a first slide bar 42 and a second slide bar 43 that are supported by the turntable 4 and extend parallel to each other in the sliding direction. The bench cutter 1 has a cutting machine body 10 that is supported by the first slide bar 42 and the second slide bar 43 and is movable in the sliding direction relative to the turntable 4. The bench cutter 1 has an electric motor 21 that is housed in the cutting machine body 10 and is a drive source for a blade 11 that cuts the material to be cut. The bench cutter 1 has a first clamping member 51 that abuts against the respective tip ends 42a, 43a of the first slide bar 42 and the second slide bar 43 at positions away from the respective base ends 42c, 43c supported by the turntable 4. The bench cutter 1 has a second clamping member 52 that faces the first clamping member 51 in a direction perpendicular to the sliding direction and cooperates with the first clamping member 51 to clamp the first slide bar 42 and the second slide bar 43.

[0060] Therefore, the first and second slide bars 42, 43 have their respective tips 42a, 43a held by the first and second clamping members 51, 52 working together to clamp them. Therefore, the first and second slide bars 42, 43 are not fixed to either the first and second clamping members 51, 52. Therefore, the clamping force acting on the first slide bar 42 can be prevented from causing a load on the second slide bar 43. The clamping force acting on the second slide bar 43 can be prevented from causing a load on the first slide bar 42. This can prevent the first and second slide bars 42, 43 from being twisted by either a dynamic twist caused by a load applied by the user or a static twist that is permanently maintained. Thus, the first and second slide bars 42, 43 can be maintained in a state of extending parallel to each other.

[0061] 13, bench cutter 1 has bolts (fasteners) 53 that secure first clamping member 51 and second clamping member 52 at positions offset from first slide bar 42 and second slide bar 43. Therefore, bolt 53 is not directly fastened to first slide bar 42 or second slide bar 43. This makes it possible to prevent the fastening force of bolt 53 from acting on first slide bar 42 and second slide bar 43. This makes it possible to prevent the first slide bar 42 and second slide bar 43 from being subjected to a load that would cause them to twist relative to each other.

[0062] 13, bolt 53 is positioned between first slide bar 42 and second slide bar 43. Therefore, the first clamping member 51 and second clamping member 52 can clamp first slide bar 42 and second slide bar 43 with a small number of bolts 53. This allows the structure for clamping first slide bar 42 and second slide bar 43 to be made compact. Also, the number of parts can be reduced, suppressing manufacturing costs.

[0063] 11 and 13, a single bolt 53 is capable of fixing first clamping member 51 and second clamping member 52 together. Therefore, first slide bar 42 and second slide bar 43 can be clamped by first clamping member 51 and second clamping member 52 while minimizing the number of bolts 53.

[0064] 11, fastener 53 is a bolt. Therefore, by simply providing a structure for clamping first slide bar 42 and second slide bar 43, the workability of the assembly work can be improved.

[0065] As shown in Fig. 13, the second clamping member 52 has a pitch restricting portion 52a that restricts the pitch of the first slide bar 42 and the second slide bar 43 by contacting the tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43, respectively. This restricts the first slide bar 42 and the second slide bar 43 from moving relatively in the radial direction. This makes it easier to maintain the first slide bar 42 and the second slide bar 43 in a state in which they extend parallel to each other. This allows the cutting machine body 10 (see Fig. 3) to move smoothly in the sliding direction.

[0066] 13, pitch restricting portion 52a of second clamping member 52 includes first insertion hole 52b and second insertion hole 52c into which tip ends 42a, 43a of first slide bar 42 and second slide bar 43 are respectively inserted. Therefore, by providing pitch restricting portion 52a, which restricts the pitch of first slide bar 42 and second slide bar 43, with a simple structure, it is possible to improve the workability of the assembly work.

[0067] 11 and 13, the first clamping member 51 is rod-shaped and has a flat surface 51a that abuts against the tip ends 42a, 43a of the first slide bar 42 and the second slide bar 43. Therefore, it is possible to precisely prevent the tip ends 42a, 43a of the first slide bar 42 and the second slide bar 43 from rotating about their axes and twisting.

[0068] 11 and 13, the first clamping member 51 is made of steel. Therefore, the first clamping member 51 can be made of a highly rigid material. This makes it possible to precisely prevent the tip ends 42a, 43a of the first slide bar 42 and the second slide bar 43 from being subjected to a twisting load relative to each other.

[0069] 11 and 13, the second clamping member 52 is made of a light metal. Therefore, the second clamping member 52 can be made of a material that is easy to process. This makes it possible to reduce manufacturing costs.

[0070] As shown in Figures 3 and 6, the bench cutter 1 has a turntable 4 on which a material to be cut is placed. The bench cutter 1 has a first slide bar 42 and a second slide bar 43 that are supported by the turntable 4 and extend parallel to each other in the sliding direction. The bench cutter 1 has a cutting machine body 10 that is supported by the first slide bar 42 and the second slide bar 43 and is movable in the sliding direction relative to the turntable 4. The bench cutter 1 has an electric motor 21 that is housed in the cutting machine body 10 and is the drive source of a blade 11 that cuts the material to be cut. The bench cutter 1 has a second clamping member (holder) 52 that holds the respective tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43. The bench cutter 1 has a first clamping member (rotation control member) 51 that is attached to a second clamping member 52 at a position separate from the first slide bar 42 and the second slide bar 43 and abuts against each of the tip ends 42a, 43a of the first slide bar 42 and the second slide bar 43 to control the rotation of each of the tip ends 42a, 43a around their axes.

[0071] Therefore, the first clamping member 51 restricts the tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43 from rotating around the axis. However, the first clamping member 51 suppresses the load of rotating around the axis on the tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43. The second clamping member 52 holds the tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43. However, the second clamping member 52 suppresses the load of rotating around the axis on the tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43. Therefore, the tip portions 42a, 43a of the first slide bar 42 and the second slide bar 43 can be suppressed from twisting relative to each other. This allows the first slide bar 42 and the second slide bar 43 to be maintained in a state of extending parallel to each other.

[0072] Next, a second embodiment of the present disclosure will be described with reference to Fig. 14. A bench cutter 80 of the second embodiment has a bar holding unit 81 instead of the bar holding unit 50 shown in Fig. 13. In the following description, only the differences from the first embodiment will be described in detail. As shown in Fig. 14, the bar holding unit 81 has a first clamping member 82 and a second clamping member 83 that clamp the first slide bar 42 and the second slide bar 43 in the left-right direction. The first clamping member 82 is located on the left side, and the second clamping member 83 is located on the right side.

[0073] 14, the first clamping member 82 is made of steel and has a rectangular rod shape (square prism shape) with the longitudinal direction being the up-down direction. The first clamping member 82 has a flat surface 82a extending in the up-down direction. A circular through hole 82b is provided in the center of the first clamping member 82 in the up-down direction, penetrating the first clamping member 82 in the direction perpendicular to the flat surface 82a.

[0074] As shown in Fig. 14, the second clamping member 83 is made of a light metal such as aluminum or magnesium. The second clamping member 83 is formed in a generally rectangular rod shape that is long in the vertical direction. The second clamping member 83 has a flat surface 83a that extends in the vertical direction. A screw hole 83b that extends from left to right is provided in the center of the second clamping member 83 in the vertical direction.

[0075] 14, the bar holding portion 81 has a bolt 53 that fastens a first clamping member 82 and a second clamping member 83 in the left-right direction. The male thread 53b of the bolt 53 is inserted from left to right through a through hole 82b of the first clamping member 82, and is further fastened to a screw hole 83b of the second clamping member 83 disposed on the right side.

[0076] As shown in FIG. 14, at least a part of the flat portion 42b of the first slide bar 42 can abut against the flat surface 82a of the first clamping member 82. This prevents the tip 42a of the first slide bar 42 from rotating about its axis. The outer periphery of the tip 42a of the first slide bar 42 abuts against the flat surface 83a of the second clamping member 83. At least a part of the flat portion 43b of the second slide bar 43 can abut against the flat surface 82a of the first clamping member 82. This prevents the tip 43a of the second slide bar 43 from rotating about its axis. The axial force of the bolt 53 acts between the first clamping member 82 and the second clamping member 83, and does not directly act on the tip 42a of the first slide bar 42 and the tip 43a of the second slide bar 43. Therefore, the generation of a load that rotates the tip 42a of the first slide bar 42 or the tip 43a of the second slide bar 43 around the axis is suppressed. Although there is no means for regulating the pitch of the first slide bar 42 and the second slide bar 43 in the second embodiment, a pitch regulating means may be provided. For example, one through hole is provided in each of the slide bars 42 and 43, and two through holes are provided in the second clamping member 83. A first pin is press-fitted into the through hole of the first slide bar 42 and the first hole of the second clamping member 83, and a second pin is press-fitted into the through hole of the second slide bar 43 and the second hole of the second clamping member 83. The pitch of the slide bars 42 and 43 can be regulated by the two pins.

[0077] Next, a third embodiment of the present disclosure will be described with reference to Fig. 15. A bench cutter 90 of the third embodiment has a bar holding unit 91 instead of the bar holding unit 50 shown in Fig. 13. In the following description, only the differences from the first and second embodiments will be described in detail. As shown in Fig. 15, the bar holding unit 91 has a first clamping member 92 and a second clamping member 52 that clamp the first slide bar 42 and the second slide bar 43 in the left-right direction. The first clamping member 92 is located on the left side, and the second clamping member 52 is located on the right side.

[0078] As shown in Fig. 15, the first clamping member 92 is made of steel and has a circular rod shape with the longitudinal direction being the up-down direction. The outer peripheral surface of the first clamping member 92 is provided as a cylindrical curved surface 92a. The curved surface 92a extends linearly in the up-down direction. A circular through hole is provided in the center of the first clamping member 92 in the up-down direction, penetrating the first clamping member 92 in the left-right direction.

[0079] 15, the bar holding portion 91 has a bolt 53 that fastens the first clamping member 92 and the second clamping member 52 in the left-right direction. The male thread 53b of the bolt 53 is inserted from left to right into the through hole of the first clamping member 92, and is further fastened to the screw hole 52e of the second clamping member 52 disposed on the right side.

[0080] As shown in FIG. 15, at least a part of the flat portion 42b of the first slide bar 42 can abut against the curved surface 92a of the first clamping member 92. This prevents the tip portion 42a of the first slide bar 42 from rotating about its axis. At least a part of the flat portion 43b of the second slide bar 43 can abut against the curved surface 92a of the first clamping member 92. This prevents the tip portion 43a of the second slide bar 43 from rotating about its axis. The axial force of the bolt 53 acts between the first clamping member 92 and the second clamping member 52, and does not directly act on the tip portion 42a of the first slide bar 42 and the tip portion 43a of the second slide bar 43. This prevents the generation of a load that rotates the tip portion 42a of the first slide bar 42 or the tip portion 43a of the second slide bar 43 about its axis.

[0081] As described above, the first clamping member 92 is rod-shaped with an outer circumferential surface formed by a curved surface 92a as shown in Fig. 15. This makes it possible to reduce the number of processing steps for the first clamping member 92. This makes it possible to reduce manufacturing costs.

[0082] Various modifications can be made to the bench cutters 1, 80, and 90 of the above-described embodiments. The slide bar 41 is exemplified as being located above the turntable 4, in front of the support arm 40, and to the right of the cutting machine body 10. Alternatively, the slide bar 41 may be provided, for example, below the turntable. For example, the slide bar 41 may be provided behind the support arm 40. For example, the slide bar 41 may be provided to the left, rear, or upper side of the cutting machine body 10. The bench cutter 1 is exemplified as being fixed by press-fitting the slide bar 41 into the support arm 40, and the swing support member 44 slides in the front-rear direction relative to the slide bar 41. Alternatively, the slide bar 41 may be fixed to the swing support member 44, for example, and may be slidable in the front-rear direction relative to the support arm 40.

[0083] A configuration including two mutually parallel slide bars 41, the first slide bar 42 and the second slide bar 43, has been exemplified. Alternatively, three or more slide bars 41 may be provided. The first slide bar 42 and the second slide bar 43 aligned vertically have been exemplified. Alternatively, the first slide bar 42 and the second slide bar 43 may be aligned horizontally, for example. For example, the first slide bar 42 and the second slide bar 43 may be aligned in a direction inclined relative to the vertical or horizontal direction. The slide bar 41 may be non-parallel to the side of the cutting tool 11. The slide bar 41 may be non-parallel to the horizontal line.

[0084] Although the configuration in which the first clamping member 51 is located on the left side and the second clamping member 52 is located on the right side has been exemplified, they may be arranged in reverse. The first clamping member 51 and the second clamping member 52 may clamp the first slide bar 42 and the second slide bar 43 in the vertical direction, for example. The configuration in which the first clamping member 51 and the second clamping member 52 are provided as separate members has been exemplified. Instead of this, the first clamping member 51 and the second clamping member 52 may be provided as a single member.

[0085] In the illustrated embodiment, the bolt 53 fastens the first clamping member 51 and the second clamping member 52 in the up-down direction between the first slide bar 42 and the second slide bar 43. Alternatively, the bolt 53 may fasten the first clamping member 51 and the second clamping member 52, for example, above the first slide bar 42 or below the second slide bar 43. Instead of the bolt 53, the first clamping member 51 and the second clamping member 52 may be fastened by, for example, a belt or the like.

[0086] The first clamping member 51 has a rectangular rod shape (square prism shape) as an example. Alternatively, the first clamping member 51 may have a semi-cylindrical shape, a polygonal prism shape, or the like, having at least one flat surface 51a. The first clamping member 92 has a cylindrical shape as an example. Alternatively, the first clamping member 92 may have an elliptical cylindrical shape, an oblong cylindrical shape, or the like, having a curved surface 92a.

[0087] The above example shows a bench cutter 1 in which the electric motor 21 is driven by the battery 28, which is a DC power source. Alternatively, the present invention may be applied to a bench cutter in which the electric motor 21 is driven by, for example, an AC power source. The attitude of the electric motor 21 (extension direction of the motor axis J), the mounting position of the battery 28, the arrangement of the operating handle 31, etc. are not limited to those shown in the example, and may be changed as appropriate. [Explanation of symbols]

[0088] 1. Benchtop cutting machine 2...base, 2a...table rotation shaft 3. Auxiliary table 4... turntable (table), 4a... table top, 4b... arm support 5...Table extension, 5a...Blade plate, 5b...Slot hole 6...positioning fence, 6a...positioning surface 7...Miter scale plate, 7a...Fixing screw, 7b...Positioning recess 8…Indicator 10...cutting machine body, 10a...up-down swing shaft 11...cutting tool 12…Fixed cover, 12a…Arrow 13... Movable cover 16…Bottom dead center stopper 17…Top dead center stopper 20…Motor housing 21...Electric motor 22...Gear housing 23...Reduction gear train 24…Output shaft 25…Controller housing 26…Controller 27…Battery mounting section 28…Battery 30…Handle section 31...Operation handle 32…Switch lever 33…Lock off button 34…Carrying handle 35...Switch (for laser irradiator) 36...Switch (for turning on lighting fixtures) 37...Laser irradiator 38...Lighting equipment, 38a...Arm 40...support arm, 40a...left-right tilting shaft, 40b, 40c...through holes 41...Slide bar 42...first slide bar, 42a...tip portion, 42b...flat portion, 42c...base end portion 43: second slide bar, 43a: tip portion, 43b: flat portion, 43c: base end portion 44... Swing support member, 44a... Bottom dead center stopper abutment portion, 44b... Top dead center stopper abutment portion, 44c... Bar mounting portion, 44d... Knob 46…Bottom dead center lock pin 47…Maximum inclination angle switching lever 50…Bar holder 51...first clamping member (rotation restricting member), 51a...flat surface (rotation restricting portion), 51b...through hole 52... second clamping member (holder), 52a... pitch regulation portion, 52b... first insertion hole 52c: second insertion hole, 52d: flat portion, 52e: screw hole 53...Bolt (fastener), 53a...Head, 53b...Male thread 60…Turntable fixing mechanism 61…Grip section 62…Fixed rod 65...Positive lock mechanism 66...lock release lever, 66a...positioning pin, 66b...compression spring 66c…Pin support 67…Adjusting bolt 70…Tilt fixing mechanism 71...Tilt fixed operation part 72…Reduction gear section 73...Transmission shaft 80…Benchtop cutting machine 81…Bar holder 82...first clamping member (rotation restricting member), 82a...flat surface (rotation restricting portion), 82b...through hole 83: second clamping member (holder), 83a: flat surface, 83b: screw hole 90…Benchtop cutting machine 91…Bar holder 92...first clamping member (rotation restricting member), 92a...curved surface 101...Holder 102, 103…Slide bar 104, 105...Set screws 111…Connecting plate 112,113…Slide bar 114,115…Volts J: Motor axis R1: rotational force, R2: load (in the rotational direction) F1,F2…direction

Claims

1. A benchtop cutting machine, a table on which the workpiece is placed; first and second slide bars supported on the table and extending parallel to each other in a sliding direction; a cutting machine body supported by the first and second slide bars and movable in the slide direction relative to the table; an electric motor housed in the cutting machine body and serving as a drive source for a cutting tool for cutting the workpiece; a first clamping member that contacts each of the tip ends of the first and second slide bars at positions spaced apart from each of the base ends of the first and second slide bars supported on the table; a bench cutter having a second clamping member that faces the first clamping member in a direction perpendicular to the sliding direction and cooperates with the first clamping member to clamp the first and second slide bars;

2. The bench cutter according to claim 1, A bench cutter having a fastener for fixing the first clamping member and the second clamping member at a position separated from the first and second slide bars.

3. The bench cutter according to claim 2, The fastener is located between the first and second slide bars of the bench cutter.

4. The bench cutter according to claim 2, The bench cutter includes a single fastener capable of fixing the first clamping member and the second clamping member together.

5. The bench cutter according to any one of claims 2 to 4, The fastener is a bolt.

6. The bench cutter according to any one of claims 1 to 4, The second clamping member has pitch regulating portions that abut against the tip ends of the first and second slide bars, respectively, to regulate the pitch of the first and second slide bars.

7. The bench cutter according to claim 6, The pitch regulating portion of the second clamping member has first and second insertion holes into which the tip ends of the first and second slide bars are inserted, respectively.

8. The bench cutter according to claim 1, The first clamping member is a rod-shaped bench cutter having a flat surface that abuts against the tip ends of the first and second slide bars.

9. The bench cutter according to claim 1, The first clamping member is a rod-shaped bench cutter having a curved outer periphery.

10. The bench cutter according to claim 1, The first clamping member is made of steel.

11. The bench cutter according to claim 1, The second clamping member is made of light metal.

12. A benchtop cutting machine, a table on which the workpiece is placed; first and second slide bars supported on the table and extending parallel to each other in a sliding direction; a cutting machine body supported by the first and second slide bars and movable in the slide direction relative to the table; an electric motor housed in the cutting machine body and serving as a drive source for a cutting tool for cutting the workpiece; a holder for holding the respective tip ends of the first and second slide bars; a bench cutter having a rotation restricting member attached to the holder at a position separate from the first and second slide bars and abutting against each tip end of the first and second slide bars to restrict rotation of each tip end around its axis.

Images