JP2006069048A - Bench cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bench cutter capable of being enhanced in its portability by well keeping a weight balance at the time of carrying. <P>SOLUTION: The bench cutter 1 has a circular saw part 6 equipped with a base part 2, a holder 3 and a rotationally driven circular saw blade 5 and provided with a transport handle 50 and a support member 7 for supporting the circular saw part 6 so as to shake the same up and down and is constituted so that the support member 7 is held to the guide bar 8 almost horizontally supported on the holder 3 in a state possible to slide and a material to be processed can be cut by the circular saw blade 5 while moving the support member 7 along the guide bar 8 along with the circular saw part 6. The circular saw blade 5 is arranged at an almost central part in a width direction while the guide bar 8 is arranged at a position offset left or right by a predetermined quantity with respect to the central part in the breadthwise direction and the transport handle 50 provided to the circular saw part 6 is arranged between the circular saw blade 5 and the guide bar 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tabletop cutting machine capable of swinging a circular saw portion having a circular saw blade that is driven to rotate in the vertical direction with respect to a base portion and moving the circular saw portion in a horizontal direction.

  As this type of tabletop cutting machine, a base part on which a workpiece can be placed, a holder erected on the base part, a circular saw part provided with a drive source and a circular saw blade driven to rotate by this, A support member for pivotally supporting the circular saw portion so as to be swingable in the vertical direction; and the support member is attached to a front end portion of a guide bar supported by the holder so as to be slidable substantially horizontally. A material that cuts a workpiece with the circular saw blade while being moved with respect to the base portion together with the guide bar has been proposed (see Patent Documents 1 and 2).

  By the way, the circular saw part of such a tabletop cutting machine is provided with a carrying handle for holding the tabletop cutting machine for carrying, and the operator carries the tabletop cutting machine by holding the carrying handle. be able to.

Japanese Utility Model Publication No. 62-011526 (FIG. 1) Japanese Utility Model Publication No. 62-200401 (FIG. 1)

  However, in a conventional tabletop cutting machine, the carrying handle may be provided at a position that is greatly decentered to the left and right with respect to the center in the width direction. In such a case, the tabletop cutting is performed by grasping the carrying handle. When carrying the machine, the weight balance between the left and right sides was lost, which caused the tabletop cutting machine to tilt significantly left and right, making it difficult to carry it.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a tabletop cutting machine capable of improving the portability while maintaining a good weight balance when being carried.

  In order to achieve the above object, the invention according to claim 1 includes a base portion on which a workpiece can be placed, a holder erected on the base portion, and a circular saw blade that is rotationally driven by a drive source. A circular saw part, and a support member that pivotally supports the circular saw part so as to be swingable in the vertical direction.The support member is slidably held on a guide bar supported substantially horizontally by the holder, In a tabletop cutting machine capable of cutting a workpiece by the circular saw blade while moving a support member along the guide bar together with the circular saw portion, the circular saw blade is disposed at a substantially center in the width direction, and the guide The bar is disposed at a position offset by a predetermined amount on either the left or right side with respect to the center in the width direction, and a transport handle to be gripped during transport is disposed between the circular saw blade and the guide bar in the width direction. Features.

  The invention according to claim 2 is the invention according to claim 1, wherein the carrying handle has a shape in which the gripping portion is substantially horizontal when the circular saw portion swings to the lowest position. It is characterized by that.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the circular saw is moved to the rearmost position along the guide bar and locked when the tabletop cutting machine is transported. The carrying handle is positioned substantially in the center in the length direction.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the guide bar is provided in two upper and lower sides, and both guide bars have a plane passing through the center of each of the guide bars. It arrange | positions so that it may become substantially parallel with respect to.

  The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, the length of the guide bar is set shorter than the length in the longitudinal direction of the base portion.

  According to the first aspect of the present invention, the transport handle is disposed between the circular saw blade disposed substantially at the center in the width direction and the guide bar disposed at a position offset left or right by a predetermined amount therefrom. Therefore, the transport handle is disposed at a position close to the center of gravity of the tabletop cutting machine in the width direction, and the right and left weight balance when carrying the tabletop cutting machine by gripping the transport handle is well maintained. The tabletop cutting machine can be easily carried without tilting it to the left or right, improving the portability of the tabletop cutting machine.

  According to the second aspect of the present invention, when the circular saw part is swung to the lowermost position during the transportation of the tabletop cutting machine, the gripping part of the transport handle becomes substantially horizontal. The tabletop cutting machine can be easily carried and held.

  According to the third aspect of the present invention, the transport handle is positioned substantially in the center in the length direction in a state where the circular saw portion is moved to the rearmost position along the guide bar and locked during transport of the tabletop cutting machine. As a result, the front and back weight balance when carrying the tabletop cutting machine by holding the carrying handle can be maintained well, and the tabletop cutting machine can be easily carried without tilting left and right and back and forth. The portability of the cutting machine is further enhanced.

  According to the invention described in claim 4, since the two guide bars provided on the upper and lower sides are arranged so that the plane passing through each center thereof is substantially parallel to the side surface of the circular saw blade, the portable cutting machine can be carried. Sometimes the rigidity against the load applied to the guide bar is increased.

  According to the invention described in claim 5, since the length of the guide bar is shorter than the length in the longitudinal direction of the base portion, the tabletop cutting machine can be reduced in size in the longitudinal direction, and the portability can be reduced. It can be further increased.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a side view of a tabletop cutting machine according to the present invention, FIG. 2 is a plan view of the tabletop cutting machine, FIG. 3 is a front view of the tabletop cutting machine (a view in the direction of arrow A in FIG. 1), and FIG. FIG. 5 is a sectional view taken along the line CC in FIG. 1, FIG. 6 is a sectional view taken along the line DD in FIG. 1, and FIG. 7 is a cutting operation. FIG. 8 is a side view showing the state of the tabletop cutting machine during carrying, and FIG. 9 is a side view of the tabletop cutting machine showing the state in which the guide bar protrudes backward from the holder. FIG. 10 is a front view of a tabletop cutting machine showing a state where the circular saw portion is inclined to the right, FIG. 11 is a front view of the tabletop cutting machine showing a state where the circular saw portion is inclined to the left, and FIG. It is a side view of the tabletop cutting machine which shows work (slide cutting).

  A tabletop cutting machine 1 according to the present embodiment is a tabletop circular saw machine, and has a base portion 2 on which a workpiece W that is a square pillar-shaped wood can be placed, and is erected on the base portion 2 A holder 3, a motor 4 as a driving source, a circular saw portion 6 including a circular saw blade 5 driven to rotate by this, and a support member 7 that pivotally supports the circular saw portion 6 so as to be swingable in the vertical direction. The support member 7 is slidably held on two upper and lower guide bars 8 supported substantially horizontally by the holder 3, and the support member 7 is moved along the guide bar 8 together with the circular saw portion 6. The workpiece W is cut by the circular saw blade 5 while being moved.

  The base portion 2 includes a base 9 installed on a floor surface and the like, and a turntable 10 having a substantially circular shape in plan view that can be rotated horizontally around the base 9. The upper surface of 10 forms the same plane, and the workpiece W can be placed on this upper surface and cut. The turntable 10 is horizontally mounted with a knob 11 for rotating it and locking the rotation with respect to the base 9.

  The base 9 is provided with a pair of left and right fences 12 (see FIGS. 2 to 4) standing upright from the upper surface thereof, and each vertical end surface of the fence 12 constitutes a pressing surface 12a. As shown in FIG. 1, the cutting operation can be stably performed in a state in which one surface of the workpiece W is abutted against the pressing surface 12a.

  As shown in FIG. 1, at the rear end portion (left end portion of FIG. 1) of the turntable 10, the holder 3 standing upright is left and right by a tilting shaft 13 that is long in the front-rear direction (left-right direction in FIG. 1). The holder 3 is pivotally supported so as to be tiltable in the direction (see FIGS. 10 and 11), and the tilting of the right and left of the holder 3 is locked by a clamp mechanism 14 described below.

  That is, as shown in FIG. 1, a projecting portion 10a standing vertically is integrally formed at the rear end portion of the turntable 10, and a part of the projecting portion 10a is formed between the rear end surface of the holder 3 and the holder. 3 is covered with a projection 3a formed integrally with the projection 3a. A wedge-shaped slider 15 is interposed between the protrusion 10a of the turntable 10 and the protrusion 3a of the holder 3. The slider 15 is vertically inserted into the protrusion 3a of the holder 3 from above. The clamp bolt 16 to be engaged is screwed. Here, a clamp lever 17 is attached to the upper end of the clamp bolt 16, and the slider 15 is always biased downward (in the unclamping direction) by a spring 18. In the clamp mechanism 14 configured as described above, when the clamp lever 17 is rotated in the loosening direction, the clamp bolt 16 rotates together with the clamp lever 17 to move the slider 15 downward, and the clamp of the holder 3 by the slider 15 is released. The holder 3 can tilt left and right around the tilting shaft 13, and if the clamp lever 17 is rotated in the tightening direction, the clamp bolt 16 rotates in the reverse direction together with the clamp lever 17, and the slider 15 resists the biasing force of the spring 18. Therefore, the slider 15 is clamped by clamping the holder 3 with the protruding portion 10a of the turntable 10 by the wedge action, whereby the tilt of the holder 3 is locked.

  Here, as shown in FIGS. 3, 10, and 11, stoppers 3 b and 3 c that are positioning means for regulating the inclination angle of the holder 3 are provided at the base end portion of the holder 3 near the base portion 2. The stopper bolts 19 and 20 which are fine tilt adjusting means positioned on the movement trajectory of the stoppers 3b and 3c are screwed vertically on the upper surface of the turntable 10. Therefore, when the circular saw portion 6 is tilted left and right (herein, left and right are left and right from the front to the rear) with the tilt shaft 13 as the center, the stoppers 3b and 3c are stopper bolts 19 at a predetermined tilt angle. , 20 abuts on the respective heads, whereby the inclination angle of the circular saw portion 6 is regulated. Specifically, as shown in FIG. 10, when the circular saw part 6 is inclined 45 ° to the right, the stopper 3b comes into contact with the head of the stopper bolt 19, and the circular saw part 6 is turned to the left as shown in FIG. The stopper 3c is set so as to abut against the head of the stopper bolt 20 when tilted by 45 °, so that the holder 3, the support member 7 and the circular saw portion 6 have a maximum of 45 ° left and right around the tilting shaft 13. Can be tilted.

  Furthermore, as shown in FIG. 1, a through hole 10b is formed in the upper part of the turntable 10, and a pin 21 as a positioning means for holding the holder 3 vertically is provided in the through hole 10b in the front-rear direction. It is slidably inserted. As shown in FIG. 3, a stopper bolt 22 positioned on the movement locus of the pin 21 is screwed laterally to the holder 3, and the tip of the stopper bolt 22 contacts the outer peripheral surface of the pin 21. At the time of contact, the holder 3 is in the vertical standing state shown in FIGS. 3 and 4, and when the clamp lever 17 is tightened in this state, the tilting of the holder 3 is locked, and the holder 3 is kept in the vertical standing state. It is.

  By the way, as shown in FIGS. 2-4, the holder 3 is standingly inclined toward the upper right direction from the center part of the width direction of the said tabletop cutting machine 1, and the upper end vertical part has two upper and lower sides. The guide bar 8 is slidably inserted and supported. Here, each guide bar 8 is made of a pipe material, and its length is set to be shorter than the length in the longitudinal direction (length in the front-rear direction) of the base portion 2. The connecting members 23 are connected to each other. Accordingly, both guide bars 8 are prevented from coming off from the holder 3 by both connecting members 23. The lower guide bar 8 is slidably supported by a ball bearing 24 provided in the guide bar insertion hole 3d of the holder 3 as shown in detail in FIG. The guide bar 8 may be slidably supported on the holder 3 by the oil impregnated metal 25 as shown in FIG. 14, or directly slides into the guide bar insertion hole 3d of the holder 3 as shown in FIG. It may be inserted and supported freely.

  Further, a clamp knob 26 as a locking means is screwed onto the upper portion of the holder 3, and by rotating the clamp knob 26 and pressing the tip of the threaded portion against the outer peripheral surface of the guide bar 8, the guide bar 8 can be locked to the holder 3 to prevent its sliding.

  Here, as shown in FIGS. 3 and 4, the upper and lower two guide bars 8 are arranged substantially parallel to the side surface of the circular saw blade 5. That is, the two upper and lower guide bars 8 are arranged so that the plane passing through the center thereof is substantially parallel to the side surface of the circular saw blade 5.

  In addition, as shown in FIG. 16, if a scale is attached to the upper guide bar 8, the sliding amount of the guide bar 8 can be easily visually checked by the scale.

  Further, as the locking means for fixing the sliding of the guide bar 8 along the holder 3, the one shown in FIG. 17 can be adopted.

  That is, FIG. 17 is a cross-sectional view of the holder 3 portion showing another form of the locking means of the guide bar 8, and one guide bar 8 has a plurality of circular holes 8a formed at equal intervals in the length direction. The holder 3 is fitted with a stopper pin 27 slidably inserted in a direction perpendicular to the sliding direction of the guide bar 8. Here, the stopper pin 27 is constantly urged toward the guide bar 8 (upward in FIG. 17) by a spring 28 that is contracted on the outer periphery thereof, and its tip part is formed by a plurality of circular holes 8 a of the guide bar 8. By selectively fitting into one, the slide of the guide bar 8 can be locked, and the slide regulation amount of the guide bar 8 can be adjusted stepwise. Then, when the stopper pin 27 is pulled out from the state shown in FIG. 17 against the biasing force of the spring 28 (downward in FIG. 17), the stopper pin 27 is fitted to the circular hole 8a of the guide bar 8 at the tip. The guide bar 8 can be freely slid with respect to the holder 3. A pin 29 is inserted into and fixed to the stopper pin 27 in a direction perpendicular to the axis, and this pin 29 slides in a guide groove 3 e formed in the holder 3. Then, if the stopper pin 27 is pulled out from the state shown in FIG. 17 and rotated 90 ° about the axis center, the pin 27 is locked in the groove 3 f of the holder 3 and the stopper pin 27 is fixed to the guide bar of the holder 3. The stopper pin 27 is retracted from the insertion hole 3d and does not prevent the guide bar 8 from sliding.

  The support member 7 is slidably inserted into and supported by the two upper and lower guide bars 8. That is, as shown in FIG. 6, guide bar insertion holes 7a and 7b are provided on the upper and lower sides of the support member 7, and the support member 7 is provided at a portion opposite to the upper guide bar insertion hole 7a. The upper and lower two guide bars 8 are slidably held via a pair of left and right sliding members 30 and a ball bearing 31 fitted in the lower guide bar insertion hole 7b. Note that the guide bar 8 may be slidably supported on the support member 7 by an oil impregnated metal 25 shown in FIG. 14 instead of the ball bearing 31.

  The pair of left and right sliding members 30 are held by a pair of left and right bolts 32 that are screwed into the holder 3, and the guide of the guide bar 8 is adjusted by turning the bolts 32 to adjust the position of the sliding member 30. The position in the bar insertion hole 7a can be adjusted. That is, if the two sliding members 30 are moved in the left direction of FIG. 6, for example, the support member 7 rotates clockwise with the lower guide bar 8 as a fulcrum. It rotates in the same direction with the guide bar 8 as a fulcrum. Thus, the angle of the circular saw blade 5 with respect to the upper surface of the base portion 2 can be finely adjusted by adopting a configuration in which the support member 7 can be rotationally adjusted with one guide bar 8 as a fulcrum.

  Here, a clamp knob 33 as a locking means is screwed onto the upper portion of the support member 7, and by rotating the clamp knob 33 and pressing the tip of the screw portion against the outer peripheral surface of the guide bar 8, The support member 7 can be locked to the guide bar 8 to prevent the sliding thereof.

  Thus, the circular saw portion 6 is supported on the support member 7 so as to be swingable in the vertical direction by the swing shaft 34 disposed in the lateral direction. The circular saw portion 6 is shown in FIG. Thus, it is always urged upward by a return spring 35 wound around the outer periphery of the swing shaft 34, and when not cut, it is positioned at the uppermost position by a stopper mechanism (not shown) as shown by a solid line in FIG. Yes.

  As shown in FIG. 6, a recess 7c is formed below the swing shaft 34 of the support member 7, and a laser oscillator 36 is accommodated in the recess 7c. Here, the laser oscillator 36 is installed so that movement adjustment is possible at least in the lateral direction, and the laser beam L (see FIG. 1) extends on the extension line of the side surface of the circular saw blade 5 or the swing locus range of the circular saw blade 5. Is used as a guide for cutting.

  Next, details of the configuration of the circular saw section 6 will be described with reference to FIG.

  The housing of the circular saw portion 6 includes a motor housing 37, a gear cover 38, and a saw cover 39. The motor 4 is housed horizontally in the motor housing 37, and a motor shaft 4a extending in the lateral direction of the motor shaft 4a. A pulley 40 is attached to one end facing the gear cover 38.

  A pulley shaft 41 and a saw blade shaft 42 that are parallel to the motor shaft 4a are rotatably supported on the gear cover 38 and the saw cover 39, and the pulley 43 that is attached to one end of the pulley shaft 41 and the pulley. Between 40, an endless transmission belt 44 is wound. A pinion 45 is integrally formed at the other end of the pulley shaft 41, and the pinion 45 meshes with a gear 46 that is bound to the saw blade shaft 42. The pulleys 40 and 43, the transmission belt 44, the pinion 45, and the gear 46 are accommodated in the gear cover 38.

  Furthermore, the disc-shaped circular saw blade 5 is bound to the end of the saw blade shaft 42 facing the saw cover 39, and the circular saw blade 5 is substantially in the center in the width direction of the tabletop cutting machine 1. Is arranged. Here, in the saw cover 39, a saw cover 47 covering the outer peripheral portion of the portion exposed from the saw cover 39 of the circular saw blade 5 is rotatably provided. As shown in FIG. In a state where the circular saw portion 6 is swinging upward, the circular saw blade 6 is rotated to a position covering the outer periphery of the portion exposed from the saw cover 39 of the circular saw blade 5, and the circular saw portion 6 swings downward as shown in FIG. In the moving state, the workpiece is stored in the saw cover 39 by a link mechanism (not shown), and a part of the outer periphery of the circular saw blade 5 is exposed from the saw cover 39 to be used for cutting the workpiece W.

  Incidentally, a handle 48 positioned on an extended line of the side surface of the circular saw blade 5 is integrally formed at the front end of the motor housing 37, and a switch 49 for controlling the driving of the motor 4 is provided in the handle 48. Is provided. By arranging the handle 48 on the extended line of the side surface of the circular saw blade 5 in this way, the reaction force applied to the circular saw portion 6 via the circular saw blade 5 during cutting (when the circular saw portion 6 swings). Can be received without incurring the inclination of the circular saw portion 6 or the like.

  Further, a carrying handle 50 is integrally formed at the upper rear end of the motor housing 37, and the carrying handle 50 has the circular saw portion 6 oscillated most downward as shown in FIGS. In this case, the grip portion has a shape that is substantially horizontal. As shown in FIG. 2, the carrying handle 50 is formed between a circular saw blade 5 disposed substantially in the center in the width direction and a guide bar 8 disposed on the right side (upper side in FIG. 2) (width). It is arranged at a position offset by e to the right from the center in the direction.

  Here, between the support member 7 and the circular saw portion 6, the circular saw portion 6 swings downward as shown in FIGS. 7 to 9, and the circular saw portion 6 swings relative to the support member 7. Fixing means (not shown) for fixing the movement is provided.

  Thus, when carrying the tabletop cutting machine 1, the swinging portion is fixed with the circular saw portion 6 positioned at the lowest position by the fixing means, and the holder 3 is held by the clamp mechanism 14 including the clamp lever 17. The support member 7 and the circular saw portion 6 are kept upright as shown in FIGS. 3 and 4, and the guide bar 8 is brought into contact with the holder 3 as shown in FIG. The guide bar 8 is locked to the holder 3 by the clamp knob 26 until it comes into contact with the holder 3, and the support member 7 and the circular saw portion 6 are moved to the rearmost position along the guide bar 8 to support the support member 7. Is brought into contact with the holder 3 and the support member 7 is locked to the guide bar 8 by the clamp knob 33. In this state, the tabletop cutting machine 1 can be carried by holding the transport handle 50. In this case, the transport handle 50 is located at a position near the center of gravity at the approximate center of the tabletop cutting machine 1 in the length direction.

  In addition, the circular saw portion 6 which is a weight portion is located at a substantially central portion in the front-rear direction (longitudinal direction) (see FIG. 8), and the carrying handle 50 is a circle disposed substantially at the center in the width direction as described above. Since it is arranged at a position near the center between the saw blade 5 and the guide bar 8 arranged on the right side (the upper side in FIG. 2), it is arranged at a position near the center of gravity of the tabletop cutting machine 1 in the width direction. Will be.

  Therefore, the weight balance in the front-rear direction and the width direction when carrying the tabletop cutting machine 1 by holding the carrying handle 50 as described above is maintained well, and the tabletop cutting machine 1 can be easily carried without tilting to the left or right. And the portability of the tabletop cutting machine 1 is improved.

  Further, when the circular saw portion 6 is swung to the lowermost position during the transport of the tabletop cutting machine 1, the gripping portion of the transport handle 50 becomes substantially horizontal. The machine 1 can be carried easily.

  Furthermore, in the present embodiment, the two guide bars 8 provided at the top and bottom are arranged so that the plane passing through each center thereof is substantially parallel to the side surface of the circular saw blade 5. The rigidity with respect to the load applied to the guide bar 8 at the time of carrying is improved.

  In addition, since the length of the guide bar 8 is shorter than the length of the base portion 2 in the longitudinal direction, the length in the longitudinal direction when carrying the tabletop cutting machine 1 can be shortened to make it compact (see FIG. 8). The portability of the tabletop cutting machine 1 is further enhanced.

  Next, the cutting operation by the tabletop cutting machine 1 configured as described above will be described.

  In the case of cutting a narrow workpiece (wood) W as shown in FIG. 1 at a right angle, the guide bar 8 is extended forward until the connecting member 23 connected thereto contacts the holder 3. Thereafter, the guide bar 8 is locked to the holder 3 by the crank knob 26, and the support member 7 is moved backward along the guide bar 8 until it contacts the holder 3, and the support member 7 is moved to the clamp knob 33. To the guide bar 8. At this time, the holder 3, the support member 7, and the circular saw portion 6 are held in a vertically upright state as shown in FIGS.

  In the above state, if the motor 4 is driven by operating the switch 49 provided on the handle 48, the rotation of the motor shaft 4a is decelerated via the pulley 40, the transmission belt 44 and the pulley 43 shown in FIG. The rotation of the pulley shaft 41 is further decelerated through the pinion 45 and the gear 46 and transmitted to the saw blade shaft 42, and the saw blade shaft 42 and the circular saw blade 5 bonded thereto are predetermined. It is rotationally driven at a speed of If the circular saw portion 6 is pushed down by grasping the handle 48 in this state, the circular saw portion 6 resists the urging force of the spring 35 and moves from the solid line position in FIG. Therefore, the workpiece W placed on the base 9 is cut at right angles by the circular saw blade 5 along the laser light L emitted from the laser oscillator 36 (right angle cutting). At this time, the circular saw blade 5 enters a groove (not shown) provided in the turntable 10 and its swing is restricted by a stopper mechanism (not shown) in a state where it enters a predetermined amount.

  After the workpiece W is cut as described above, when the pressing force to the handle 48 is released, the circular saw portion 6 swings upward about the swing shaft 34 by the biasing force of the spring 35. Return to the original position indicated by the solid line in FIG.

  Further, when the workpiece W is cut at an angle in plan view, the knob 11 is turned to release the rotation lock of the turntable 10, the knob 11 is gripped, and the turntable 10 is centered on the base 9. As shown in FIG. 1, the boulder 3 connected to the turntable 10, the guide bar 8 inserted and supported by the holder 3, the support member 7 inserted and supported by the guide bar 8, and the support member Since the circular saw portion 6 supported by 7 also rotates integrally, the angle of the circular saw blade 5 with respect to the workpiece W changes, and the workpiece W is viewed in plan at an arbitrary angle by the same procedure as described above. Can be cut diagonally.

  Further, when the workpiece W is cut obliquely when viewed from the front (the cut surface becomes a slope inclined with respect to the base 9), the clamp lever 17 of the clamp mechanism 14 is loosened to clamp the holder 3 Is released, the holder 3 is tilted to the left or right as shown in FIG. 10 or FIG. 11 about the tilt shaft 13, and the clamp lever 17 is tightened to fix the holder 3 at a desired angle (FIGS. 10 and 11). 11 shows a state in which the stoppers 3b and 3c on the holder 3 side are in contact with the heads of the stopper bolts 19 and 20 on the turntable 10 side, respectively, and the holder 3 is fixed at an angle of 45 ° to the left and right. Then, the support member 7 and the circular saw portion 6 supported by the support member 7 are also tilted to the left or right by the same angle, and the angle of the circular saw blade 5 with respect to the work material W is changed. W can be tilted at an arbitrary angle. In addition, if the angle cutting and the inclination cutting are combined, the workpiece W can be cut three-dimensionally (composite cutting).

  As described above, if the cutting operation is performed with the guide bar 8 extending forward from the holder 3, the guide bar 8 does not protrude rearward from the holder 3. Even if there is an obstacle such as an object, cutting work can be performed in a small space.

  On the other hand, when there is no obstacle such as a wall or an object behind the holder 3, the guide bar 8 is slid rearward until the support member 7 comes into contact with the holder 3 as shown in FIG. If the cutting operation is performed with the bar 8 protruding greatly to the rear of the holder 3, the guide bar 8 does not interfere with the cutting portion, so that the cutting operation when there is enough space is performed with good workability. be able to.

  Next, the slide cutting of the wide workpiece W ′ will be described.

  When there is an obstacle such as a wall or an object behind the holder 3, in order to cut a wide workpiece (wood) W ′ shown by a chain line in FIG. 1 at a right angle, as shown in FIG. , The guide bar 8 is locked to the holder 3 by the crank knob 26, and the guide of the support member 7 is clamped by the clamp knob 33. The lock to the bar 8 is released, the circular saw portion 6 is moved forward along the guide bar 8 as shown in FIG. 7, and the circular saw blade 5 is driven to rotate, while the handle 48 is pushed down to turn the circular saw. The portion 6 is swung downwardly as shown in FIG. 7 against the urging force of the spring 35 as shown in FIG. 7, and the circular saw portion 6 and the support member 7 are moved backward along the guide bar 8 (see FIG. 7) to the position shown in FIG. 1, it is placed on the base 9. Workpiece W 'is cut at a right angle by the circular saw blade 5 along the laser beam L emitted from a laser oscillator 36 (perpendicular cutting).

  Then, after the workpiece W ′ is cut as described above, when the pressing force to the handle 48 is released, the circular saw portion 6 swings upward about the swing shaft 34 by the biasing force of the spring 35. Move back to the original position. Thereafter, the workpiece W 'can be successively cut one after another by repeating the same operation. In addition, the angle cutting, the inclination cutting, and the composite cutting of the workpiece W ′ can be performed in the same manner as described above.

  As described above, if the cutting operation is performed while moving the support member 7 and the circular saw portion 6 along the guide bar 8 with the guide bar 8 extending forward from the holder 3, the guide bar 8 Does not protrude to the rear of the holder 3, so that even if there are obstacles such as walls or objects behind the holder 3, the cutting work can be performed in a small space.

  In the present embodiment, the clamp knob 26 is provided as a first locking means for locking the guide bar 8 to the holder 3, but the sliding resistance of the guide bar 8 with respect to the holder 3 is reduced by the support member 7. If the guide bar 8 is set to be larger than the sliding resistance of the guide bar 8, the guide bar 8 slides against the holder 3 only when a large force of a predetermined value or more is applied to the guide bar 8 without providing the clamp knob 26. When the support member 7 is slid on the guide bar 8, the guide bar 8 does not slide with respect to the holder 3, and the guide bar slides unexpectedly during the cutting operation. Is prevented from occurring.

  Further, since the support member 7 is slidably supported by the guide bar 8 via the ball bearing 31, when the cutting operation is performed by moving the support member 7 along with the circular saw portion 6 along the guide bar 8, The support member 7 and the circular saw portion 6 can be moved with a small force with good slidability. As a result, workability is improved and deformation of the guide bar insertion holes 7a and 7b of the support member 7 is suppressed. Is done.

  On the other hand, when there is no obstacle such as a wall or an object behind the holder 3, the support member 7 is locked to the tip of the guide bar 8 by the clamp knob 33, and the holder 3 is moved to the holder 3 by the clamp knob 26 of the guide bar 8. 9, with the handle 48 pushed down and the circular saw portion 6 swung downward as shown in FIG. 9, the support member 7 and the circular saw portion 6 are connected to each other by the support member 7. The guide bar 8 can be protruded from the holder 3 by moving backward along the holder 3 together with the guide bar 8 until it abuts on the holder 3. Then, if the handle 48 is grasped from this state and the circular saw portion 6, the support member 7 and the guide bar 8 are moved forward along the holder 3 as shown in FIG. The workpiece W ′ can be cut at right angles along the laser beam L irradiated from the laser oscillator 36 (right angle cutting). In this case as well, the angle cutting, the inclination cutting and the composite cutting of the workpiece W 'can be performed according to the same procedure as described above.

  If the cutting operation is performed while moving the guide bar 8 along the holder 3 together with the support member 7 and the circular saw portion 6 with the guide bar 8 protruding greatly to the rear of the holder 3, the guide bar 8 Since 8 does not get in the way of the cutting part, the cutting work can be performed with good workability when there is enough space.

  By the way, in this Embodiment, since the length of the guide bar 8 was made shorter than the longitudinal direction length of the base part 2, the guide bar 8 does not protrude from the base part 2 in the longitudinal direction at the time of cutting work in a small space. The tabletop cutting machine 1 can be reduced in size in the longitudinal direction and can be made compact, and cutting work in a small space can be performed.

  Further, in the present embodiment, two guide bars 8 are provided on the upper and lower sides, and the ends of both guide bars 8 are connected to each other by the connecting member 23, so that the support rigidity of the guide bar 8 to the holder 3 is enhanced, The support rigidity of the support member 7 with respect to the guide bar 8 is also increased, and the slidability of the guide bar 8 with respect to the holder 3 and the slidability of the support member 7 with respect to the guide bar 8 are enhanced. Then, the guide member 8 is reliably prevented from coming off from the holder 3 by the connecting member 23.

  Further, in this embodiment, since the ball bearings 24 and 31 or the oil impregnated metal 25 are provided in the guide bar insertion portions 3d and 7b of the holder 3 and the support member 7, the sliding resistance and support of the guide bar 8 with respect to the holder 3 are supported. The sliding resistance of the member 7 with respect to the guide bar 8 is suppressed to be small, and the sliding property between the guide bar 8 and the support member 7 is further enhanced. When a member having low sliding resistance such as ball bearings 24 and 31 is used for the sliding portion of the holder 3 and the support member 7, the operator slides the support member 7 with respect to the guide bar 8 and cuts it. It is possible to select whether to perform the operation or to perform the cutting operation by sliding the guide bar 8 with respect to the holder 3, and the workability can be improved.

  In this embodiment, the configuration in which the guide bar 8 is arranged on the right side with respect to the center in the width direction of the tabletop cutting machine 1 is adopted. However, the configuration in which the guide bar 8 is arranged on the opposite left side may be adopted. .

  In the present embodiment, two upper and lower guide bars 8 are provided, but one or three guide bars may be provided.

  Further, in the present embodiment, a configuration in which the holder 3 tilts to the left and right together with the support member 7 and the circular saw portion 6 is adopted, but a one-side tilt configuration that can tilt only to either the left or right may be employed. .

  The present invention relates to an arbitrary tabletop including a tabletop circular saw machine in which a circular saw portion having a circular saw blade that is driven to rotate is swung up and down with respect to a base portion, and a carrying handle is provided in the circular saw portion. Applicable to cutting machines.

It is a side view of the tabletop cutting machine concerning the present invention. It is a top view of the tabletop cutting machine concerning the present invention. It is a front view (figure of the arrow A direction of FIG. 1) of the tabletop cutting machine which concerns on this invention. It is a rear view (figure of the arrow B direction of FIG. 1) of the tabletop cutting machine which concerns on this invention. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a side view of the tabletop cutting machine which shows cutting work (slide cutting). It is a side view which shows the state of the desktop cutting machine at the time of carrying. It is a side view of the tabletop cutting machine which shows the state which made the guide bar project back from the holder. It is a front view of the tabletop cutting machine which shows the state which inclined the circular saw part to the right. It is a front view of the tabletop cutting machine which shows the state which inclined the circular saw part to the left. It is a side view of the tabletop cutting machine which shows cutting work (slide cutting). It is a fragmentary sectional view which shows the sliding support structure to the holder of a guide bar. It is a fragmentary sectional view which shows the sliding support structure to the holder of a guide bar. It is a fragmentary sectional view which shows the sliding support structure to the holder of a guide bar. It is a fragmentary sectional view of the guide bar support part of the holder which shows other embodiments which gave a scale to a guide bar. It is sectional drawing of the holder part which shows another form of the latching means of a guide bar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Desktop cutting machine 2 Base part 3 Holder 3d Guide bar insertion hole 4 Motor (drive source)
DESCRIPTION OF SYMBOLS 5 Circular saw blade 6 Circular saw part 7 Support member 7a, 7b Guide bar insertion hole 8 Guide bar 9 Base 10 Turntable 13 Tilt shaft 23 Connecting member 24 Ball bearing 25 Oil impregnated metal 26 Clamp knob (1st locking means)
31 Ball bearing 33 Clamp knob (second locking means)
34 Oscillating shaft 35 Return spring 48 Handle 50 Transport handle W, W 'Workpiece

Claims (5)

A base portion on which a work material can be placed, a holder erected on the base portion, a circular saw portion having a circular saw blade that is rotationally driven by a drive source, and swinging the circular saw portion up and down A support member that pivotally supports the guide bar, the support member being slidably held by a guide bar supported substantially horizontally by the holder, and the support member being moved along the guide bar together with the circular saw portion. In the tabletop cutting machine that can cut the workpiece by the circular saw blade while letting
The circular saw blade is arranged at the center in the width direction, and the guide bar is arranged at a position offset by a predetermined amount on either the left or right side with respect to the center in the width direction. A tabletop cutting machine arranged between the circular saw blade and the guide bar.   2. The tabletop cutting machine according to claim 1, wherein the carrying handle has a shape in which the gripping portion is substantially horizontal when the circular saw portion swings to the lowest position.   The transport handle is positioned substantially at the center in the length direction in a state where the circular saw portion is moved to the last position along the guide bar and locked during transport. A tabletop cutting machine according to 1 or 2.   The guide bar according to any one of claims 1 to 3, wherein two guide bars are provided on the upper and lower sides, and both guide bars are arranged such that a plane passing through each center thereof is substantially parallel to a side surface of the circular saw blade. The tabletop cutting machine described in Crab.   The tabletop cutting machine according to any one of claims 1 to 4, wherein a length of the guide bar is set shorter than a length of the base portion in a longitudinal direction.

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