JP2010132000A - Bench cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bench cutter with a rim saw which can oscillate with respect to a base upper surface, wherein a working space of the bench cutter being small and a bench rim saw has a good operability. <P>SOLUTION: The bench cutter comprises: at least two guide bars 7 of which one end being supported by a holder 5 and the other end being arranged so as to extend from the holder 5 to an upper position of a base 1; a tilt restricting means which is provided at the holder 5 and restricts the tilt of the holder 5 with respect to the base part 1; a supporting member 8 which is provided so as to be slidable on the at least two guide bars 7, the bars being movably supported by the holder 5; and an operating part 6 of the tilt restricting section which is provided so as to be operatable from the upper side of the holder 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a holder for a base portion by a tilting shaft extending substantially parallel to the axial direction of the cutting blade and substantially parallel to the upper surface of the base portion so that the angle between the side surface of the cutting blade and the upper surface of the base portion can be inclined. Relates to a tabletop cutting machine capable of tilting.

A configuration in which the holder can be tilted with respect to the base portion by a tilting shaft extending substantially parallel to the axial direction of the cutting blade and extending substantially parallel to the base upper surface so that the angle between the side surface of the conventional cutting blade and the upper surface of the base portion can be tilted In this tabletop cutting machine, the clamp lever, which is an operation member that is rotatably held behind the holder on the side opposite to the base portion, extends substantially parallel to the tilting shaft. The tilt can be fixed and released. (For example, see Patent Document 1)
There is also a tabletop cutting machine having a configuration in which an operation member for fixing / releasing the tilt between the holder and the base portion is provided on the front side of the base portion so as to extend substantially parallel to the tilt axis. (For example, see Patent Document 2)

Japanese Patent Laid-Open No. 11-254401 (FIGS. 1 and 2) Japanese Patent Laid-Open No. 11-48029 (FIGS. 1 and 2)

  In the former conventional tabletop cutting machine described above, in order to rotate the operation member protruding to the rear side (on the side opposite to the base portion) of the holder, it is necessary to wrap the hand behind the holder. In the worst case, there is a wall or an object on the wall, and it is impossible to rotate the hand between the wall or object and the operation member and to perform a rotation operation. Further, when arranging the tabletop cutting machine main body, it is necessary to consider the space behind the operation member.

  In addition, even if the rotation operation can be performed, it is necessary to operate the operation member while holding the cutting portion, so that the operator is positioned from the rear side of the main body side (side surface side of the circular saw blade). In this case, the tilting operation is performed, and the workability is deteriorated because the body must move greatly from the front position of the main body located at the time of the cutting work. In addition, in the case of a tabletop cutting machine having a slide mechanism that makes it possible to cut a wide workpiece by changing the distance between the support member that supports the swing fulcrum of the cutting part and the holder, When the distance between the operation member on the side and the cutting portion is large, the workability of the tilting operation is poor.

  In addition, the latter conventional tabletop cutting machine can fix and release the tilt by rotating the operation member located on the front side (on the side opposite to the holder) of the base portion. It is necessary to arrange the operation member up to the front surface of the base part, which increases the weight and the cost. In addition, since the distance between the operation part of the operation member and the part acting on the holder is long, the rotational force applied to the operation member during the tilting fixing operation becomes more than necessary, and the operation member may be deformed and break down. If the diameter of the shaft portion is increased in order to eliminate the problem, the weight further increases and the cost increases. In addition, since the operation members are arranged over a wide range, there is a disadvantage that the degree of freedom in tool design is reduced.

  Further, when the base portion has a base, a turntable that can be rotated with respect to the base and is connected to the holder, and further has a slide mechanism, the rotation axis of the turntable should be avoided. It is necessary to dispose the shaft portion of the operating member to the width of the protruding portion from the base in front of the turntable, which further increases the weight.

  An object of the present invention is to provide a tabletop cutting machine that eliminates the above-mentioned drawbacks, reduces the work space, and has good operability.

  The above-described object is that a base portion on which a workpiece can be placed, a cutting portion that accommodates an electric motor and rotatably supports a cutting blade that rotates by driving of the electric motor, and an axial direction of the cutting blade is substantially the same. It can be tilted with respect to the base part by a support member that supports the cutting part in a swingable manner by a parallel swinging shaft, and a tilting shaft that extends substantially perpendicular to the axial direction of the cutting blade and substantially parallel to the upper surface of the base part. A holder, one end held by the holder, the other end extending from the holder to a position above the base, and a tilting of the holder with respect to the base provided on the holder And the support member is slidably provided on at least two guide bars held immovably on the holder, and the operation portion of the tilt restriction means is a holder. Upward It is achieved by provided et operably.

  According to the present invention, it is not necessary to wrap the hand to the rear side of the holder during the tilting operation, and the tilting operation can be performed even when there is a wall or an object behind the holder. Even if it is not located on the rear side, the operation member can be reached, and the work space can be reduced in size and the operability of the tilting operation can be improved.

  Further, when arranging the tabletop cutting machine main body, it is not necessary to consider the space behind the holder and the operation member, and the work space can be reduced in size.

The front view which shows one Embodiment of this invention tabletop cutting machine. The right view of FIG. The BB sectional drawing of FIG. 1 which shows one Embodiment of the supporting member which comprises this invention tabletop cutting machine. The right view of FIG. 1 which shows the right side inclination state in this invention tabletop cutting machine. The right view of FIG. 1 which shows the left side inclination state in this invention tabletop cutting machine. The front view which shows one operation state of the tabletop cutting machine shown in FIG. The top view of FIG. AA sectional view taken on the line AA of FIG. The principal part expansion left view of FIG. 1 which shows one Embodiment of the tilt control mechanism which comprises this invention tabletop cutting machine. The principal part expansion left view of FIG. 1 which shows other embodiment of the tilt control mechanism which comprises this invention tabletop cutting machine. The front view which shows other embodiment of this invention tabletop cutting machine. The right view of FIG. The front view which shows other embodiment of this invention tabletop cutting machine. The principal part expansion left view of FIG. The principal part top view of FIG. The principal part expansion front view which shows other embodiment of the tilt control mechanism which comprises this invention tabletop cutting machine. The principal part expansion front view which shows other embodiment of the tilt control mechanism which comprises this invention tabletop cutting machine. The principal part enlarged plan view which shows other embodiment of the tilt control mechanism which comprises this invention tabletop cutting machine. The principal part expansion front view which shows other embodiment of the tilt control mechanism which comprises this invention tabletop cutting machine.

  An embodiment of the tabletop cutting machine of the present invention will be described below with reference to FIGS. Hereinafter, the tabletop cutting machine will be described as a tabletop circular saw.

  The table-top circular saw of the present invention shown in the figure accommodates base parts 1 and 2 on which a workpiece 35 can be placed and a motor 21 which is an electric motor, and rotates a circular saw blade 14 which rotates by driving of the motor 21. And a support member 8 that supports the circular saw portion 12 so as to be swingable by a swing shaft 11 substantially parallel to the axial direction of the circular saw blade 14. The angle of the side surface of the circular saw blade 14 with respect to the upper surface can be changed.

  The base portion has a base 1 that can be placed on a floor surface and the like, and an upper surface that is embedded in the base 1 and that is substantially flush with the upper surface of the base 1, and can be rotated via a rotation shaft orthogonal to the upper surface. It has the structure which has the turntable 2 connected with. During work, the workpiece 35 can be placed on the base 1 and the turntable 2 which are the base portions.

  The base 1 is provided with a pair of fences 3 having a pressing surface 3a (right end surface shown in FIG. 1) substantially orthogonal to the upper surface, and cuts a workpiece 35 as shown in FIG. When processing, the cutting work is performed in a state where one surface of the material to be cut 35 is in contact with the pressing surface 3a of the fence 3, so that the stable cutting work can be performed. When the turntable 2 is rotated with respect to the base 1, the positions of the holder 5, the guide portion 7, the support member 8, and the circular saw portion 12 connected to the turntable 2 with respect to the fence 3 are changed. The angle between the pressing surface 3a and the side surface of the circular saw blade 14 changes, and the workpiece 35 abutted against the fence 3 can be cut at various angles.

  As shown in FIG. 1, the holder 5 erected upward is tilted so as to extend substantially parallel to the side surface of the circular saw blade 14 and the upper surface of the turntable 2 near the rear end (left side shown in FIG. 1) of the turntable 2. They are connected via a shaft 4. The holder 5 can be tilted with respect to the turntable 2 with the tilting shaft 4 as a fulcrum (FIGS. 4 and 5).

  Further, a projecting portion 2 a projecting upward is provided at the rear end portion of the turntable 2, and the projecting portion 2 a is operated by operating a clamp bolt 6 that constitutes a tilt restricting means described later provided on the holder 5. And the tilting of the turntable 2 with respect to the base 1 is restricted (fixed). Thus, the tilting of the holder 5 and the turntable 2 can be fixed / released by operating the clamp lever 6. As shown in FIG. 9, the upper end surface of the projecting portion 2 a of the turntable 2 has an arc shape with the tilt shaft 4 as the center.

  The holder 5 is provided with a protrusion 28 having a shape that partially covers the upper end of the protrusion 2 a with the rear end surface of the holder 5.

  Further, two holes 5c are formed near the upper end of the holder 5 so as to be arranged substantially parallel to the side surface of the circular saw blade 14 and the upper surface of the base portion 1 (FIG. 6).

  A hard guide bar 7 made of a pipe material having substantially the same diameter or slightly larger diameter is inserted into the hole 5c of the holder 5. In the tabletop circular saw of the present invention, in order to prevent the guide bar 7 from coming off and rotating with respect to the holder 5, the holder 5 is provided with a fixing means 5d capable of projecting into the hole 5c (FIG. 6).

  The two guide bars 7 which are the guide portions of the present invention inserted into the hole 5c of the holder 5 have substantially the same length dimension, and the length dimension is shorter than the longitudinal direction of the turntable 2. .

  At the front end (right side shown in FIG. 1) of the guide bar 7 is an engaging member provided with two holes 9a arranged substantially in parallel with the side surface of the circular saw blade 14 and the upper surface of the base portion 1. A support 9 is attached. The support 9 is provided with a fixing means 9b that can project into the hole 9a. The fixing means 9b prevents the support 9 from coming off the guide bar 7 and prevents the guide bar 7 from rotating.

  A support member 8 that supports the swing shaft 11 of the circular saw portion 12 is provided on the guide bar 7 between the holder 5 and the support 9. Two holes 8a that are substantially concentric with the guide bar 7 are formed in the support member 8. One of the holes 8a (the lower hole 8a in FIG. 3) has an outer diameter approximately equal to that of the guide bar 7. A ball bearing 8b, which is one sliding portion having an inner diameter of the same size and capable of coming into contact with the outer diameter portion of the guide bar 7, is provided. In the other hole 8a (upper hole 8a in FIG. 3), two moving members 8c, which are the other sliding portions, are provided between the guide bar 7 and the moving member 8c. The tip of the bolt 8d that is screwed into the hole 8 prevents the hole 8a from falling off, and the movement can be adjusted by pressing the tip of the bolt 8d.

  Further, the support member 8 is provided with a knob 10 which is a fixing means capable of projecting into the upper hole portion 8a, and the tip of the knob 10 presses the outer diameter portion of the guide bar 7 so The position of the support member 8 can be fixed.

  By adjusting the position of the moving member 8c by operating the bolt 8d, the position of the guide bar 7 in the hole 8a can be adjusted. That is, if the two moving members 8c are moved in the left direction shown in FIG. 3, the support member 8 rotates clockwise with the lower guide bar 7 as a fulcrum. The saw blade 14 also rotates clockwise with the guide bar 7 as a fulcrum. As described above, the support member 8 can be pivotally adjusted with one guide bar 7 as a fulcrum, so that the angle of the side surface of the circular saw blade 14 with respect to the upper surface of the base 1 can be finely adjusted.

  It should be noted that the axial dimension of the hole portion 8a of the portion having the hole portion 8a of the support member 8 is substantially the same as the axial dimension of the ball bearing 8b which is one sliding portion, and the support member 8 has slidability. It has a dimension that is not less than the necessary minimum, and the movable member 8c, which is the other sliding portion, can be moved, provided with a fine angle adjustment mechanism, and a fixing means is provided in the vicinity of the other sliding portion. As a result, the size of the support member 8 can be kept small, the desktop circular saw body can be downsized, and the sliding amount of the circular saw portion 12 can be secured.

  Supports 9, which are engaging members that engage with the two guide bars 7 on the opposite side of the holder 5, are provided, and the support member 8 abuts the holder 5 so that the circular saw portion 12 The sliding to the holder 5 side is regulated, and the sliding in the direction away from the holder 5 is regulated by coming into contact with the support 9, and the supporting member 8 and the circular saw part 12 can be easily prevented from coming off. Can be done.

  According to the tabletop circular saw of the present invention, only the support member 8 and the circular saw portion 12 slide on the guide bar 7, and the force perpendicular to the sliding direction applied to the ball bearing 8b during sliding is reduced. Since the force perpendicular to the sliding direction applied to the ball bearing 8b depending on the sliding position does not increase depending on the sliding position, unlike the conventional tabletop circular saw, it is possible to reduce the size of the ball bearing 8b. It can be done.

  As shown in FIG. 3, a swing shaft 11 extending in a direction orthogonal to the axial direction of the guide bar 7 is fixed to the support member 8, and a circular saw portion 12 is connected to the support member 8 via the swing shaft 11. (FIGS. 1 and 6).

  As shown in FIGS. 1 and 3, a recess 8e is provided below the swing shaft 11 of the support member 8, and a laser oscillator 40 is provided in the recess 8e. The laser oscillator 40 is configured to be movable and adjustable at least in the axial direction of the circular saw blade 14, and can irradiate the workpiece 35 with laser light extending on an extension line on the side surface of the circular saw blade 14. .

  Further, a spring 13 is provided on the outer periphery of the swing shaft 11, and the circular saw portion 12 is urged by the spring 13 to swing in a direction (upward) in which the circular saw blade 14 is separated from the base portion. By the stopper mechanism that is not used, the uppermost position (on the side opposite to the base) shown in FIG. The cutting process is performed by swinging the circular saw portion 12 downward (base portion side) with the swing shaft 11 as a fulcrum against the urging force of the spring 13.

  When the circular saw portion 12 is swung downward (base portion side), the circular saw blade 14 enters a groove portion provided in the turntable 2 (not shown), and in a state where a predetermined amount has entered, a stopper mechanism (not shown) is used. As shown in FIG.

  As shown in FIG. 6, the tabletop circular saw of the present invention biases the circular saw portion 12 toward the holder 5 from the state in which the circular saw portion 12 is swung toward the base portion, so that the support member 8 is guided to the guide bar 7. The wide workpiece 35 can be cut while the circular saw portion 12 and the circular saw blade 14 are moved to the holder 5 side.

  As shown in FIG. 7, the circular saw portion 12 rotatably supports the gear 16 and the saw blade shaft portion 15 that is rotationally fixed, and can be mounted on the saw blade shaft portion 15 so that the circular saw blade 14 is rotationally fixed. It has a simple structure. Further, the pulley shaft 17 having a pinion 17 a meshing with the gear 16, the pulley 18 rotated and fixed to the pulley shaft 17, and the saw blade shaft portion 15 serving as the rotation shaft of the circular saw blade 14 are parallel to the circular saw blade 14. Motor 21 arranged so as to intersect the extension line of the side surface, pulley 23 that is rotationally fixed to motor shaft 22, winding around pulley 18 and pulley 23, and transmission for transmitting the rotational force of motor shaft 22 to pulley 18 Belt 24. The belt mechanism of the present invention includes a transmission belt 24 and pulleys 18 and 23.

  The housing of the circular saw portion 12 covers a part of the outer periphery of the circular saw blade 14 and a saw cover 20 shaped to cover the saw blade shaft portion 15, and is connected to the saw cover 20. The saw blade shaft portion 15, gear 16, pulley The gear cover 37 is configured to cover the shaft 17, the pulley 18, the pulley 23, and the like, and the motor housing 25 is connected to the gear cover 37 and covers the motor 21 and the motor shaft 22.

  An opened chip discharge port 20a is formed in the holder 5 side portion of the saw cover 20 (FIG. 6), and the dust collecting back 41 shown by a broken line in FIG. 1 is connected to the chip discharge port 20a or the chip discharge port. By connecting a hose connected to the dust collector to the outlet 20a, it is possible to suppress the scattering of chips generated during the cutting process.

  Note that when the support member 8 is positioned closest to the holder 5 side, the rear end surface of the dust collecting back 41 is closer to the base portion than the portion farthest from the base portion in the axial direction of the guide bar 7 (projecting portion 28 in FIG. 1). By adopting the configuration positioned at the position, it is possible to suppress the cutting operation from being affected even when the holder 5 has an obstacle such as a wall or an object behind it. Such a configuration takes into account the size of the dust collecting back 41 and, for example, the chip discharge port 20 a is angled with respect to the circular saw blade 14 so that the dust collecting back 41 is arranged on the side of the circular saw blade 14. This is achieved by having a shape extending with

  In the saw cover 20, a saw cover 19 having a shape covering the outer periphery of the circular saw blade 14 protruding from the saw cover 20 is rotatably provided. As shown in FIG. 1, the saw cover 19 rotates to a position covering the outer periphery of the circular saw blade 14 in a portion protruding from the saw cover 20 in a state where the circular saw portion 12 swings upward, as shown in FIG. In the state where the circular saw portion 12 is swinging downward, the circular saw blade 14 is accommodated in the saw cover 20 by a link mechanism (not shown) and rotated to a position where the outer periphery of the circular saw blade 14 protruding from the saw cover 20 is exposed.

  The motor housing 25 is integrally provided with a handle portion 26 positioned on an extension line of the side surface of the circular saw blade 14, and the handle portion 26 is provided with a switch 27 for controlling the driving of the motor 21. By providing the handle portion 26 on the extended line of the side surface of the circular saw blade 14, the reaction force applied to the circular saw portion 12 via the circular saw blade 14 during the cutting process (when swinging) is inclined to the circular saw portion 12. You can get without waking up.

  Further, the motor housing 25 has a sub handle having a shape in which the gripping portion is substantially parallel to the axial direction of the guide bar 7 when the circular saw portion 12 swings so as to be closest to the base portion as shown in FIG. 36, and a fixing means (not shown) for fixing the swinging of the support member 8 and the circular saw portion 12 while swinging downward. If the fixing means is operated and carried by holding the sub handle 36, it can be carried easily.

  As shown in FIGS. 2 and 8, the guide bar 7 is arranged substantially parallel to the side surface of the circular saw blade 14. In other words, the imaginary line connecting the two guide bars 7 is arranged so as to be substantially parallel to the side surface of the circular saw blade 14. With this configuration, when the circular saw portion 12 is swung, The rigidity against the load applied to the sliding portions 8b and 8c of the support member 8 and the portion of the holder 5 to which the guide bar 7 is fixed can be improved, and the rigidity against the load applied to the guide bar 7 during carrying can be improved. It becomes like this.

  The guide bar 7 is located at a position close to the extension line of the rotary shaft of the circular saw blade 14 in a state where the circular saw portion 12 is swung to the uppermost position farthest from the upper surface of the base portion. In a state where the saw portion 12 is swung to the lower position closest to the upper surface of the base portion (state of FIG. 6), the distance between the handle 26 and the circular saw blade 14 in the rotational axis direction is reduced. The guide bar 7 does not affect the overall height dimension of the tool and does not hinder downsizing, and the sliding operation during the cutting process in which the circular saw portion 12 is in the lower position can be performed more smoothly. It is like that.

  As described above, the motor 21 is arranged so as to have a portion intersecting with the extension line of the side surface of the circular saw blade 14, and the circular saw portion 12 has a belt mechanism for transmitting the rotational force of the motor 21 to the circular saw blade 14. Thus, the axial dimension of the circular saw blade 14 in the circular saw portion 12 can be reduced, and as a result, the holder 5 and the circular saw portion are arranged on the guide lever 7 side as shown in FIG. 12 can be inclined and can be inclined 45 degrees in the left-right direction.

  2, 4, and 5, stoppers 5 a and 5 b that are positioning means for tilting are provided on the base portion side portion of the holder 5, and stoppers 5 a and 5 b are provided on the upper surface of the turntable 2. Stopper bolts 30 and 31 which are fine tilt adjusting means located on the movement locus are screwed in the vertical direction. When the holder 5 is tilted with the tilt shaft 4 as a fulcrum, the stoppers 5a and 5b abut against the heads of the stopper bolts 30 and 31 at a predetermined tilt angle, and the tilt position of the circular saw portion 12 is positioned. The stopper bolt 30 is provided so as to engage with the stopper 5a when the holder 5 is tilted to a position of 45 degrees to the left. Further, the stopper bolt 31 is provided so as to engage with the stopper 5b when the holder 5 is inclined to the position of 45 degrees in the right direction.

  Further, a through hole 2b is provided in the upper part of the turntable 2, and a pin 32 serving as a positioning means at a right angle is provided in the through hole 2b so as to be horizontally movable back and forth, as shown in FIG. 5, a stopper bolt 33 is screwed in the vertical direction so as to be positioned on the movement locus of the pin 32. When the holder 5 is in a right-angle cutting position, the tip of the stopper bolt 33 and the outer diameter portion of the pin 32 come into contact with each other.

  In the above-described configuration, in order to set the circular saw portion 12 in a vertical position and cut the workpiece 35 at a right angle, the holder 5 is tilted with the pin 32 moved forward, the stopper bolt 33 tip and the pin 32 outer diameter. This is done by fixing the tilting position of the holder 5 by tightening the clamp lever 6 when the part is tilted to the contact position.

  In order to cut the workpiece 35, the switch 27 provided on the handle 26 is operated, the motor 21 is driven to rotate, and the circular saw blade 14 is rotated via the saw blade shaft 15. In this state, the handle 26 is held and the circular saw 12 is pushed down against the urging force of the spring 13 to cut the workpiece 35. When the circular saw blade 14 enters the groove portion of the turntable 2 and the cutting of the workpiece 35 is completed, when the pressing force to the circular saw portion 12 is released, the biasing force of the spring 13 returns to the original upper limit position. Return. When cutting an angle, the turntable 2 is rotated and the workpiece 35 is cut by the cutting method described above.

  Next, a description will be given of the configuration of the tilt restricting means for restricting (fixing) the tilt of the holder 5 with respect to the base parts 1 and 2 and the method of operating the tilt restricting means to tilt the circular saw part 12 left and right.

  As shown in FIG. 1 and FIG. 9, a projecting portion 2 a having an arcuate upper end surface projecting upward is formed on the end surface of the turntable 2 on the holder 5 side. It is covered with the end face and the protrusion 28 provided on the holder 5. A slider 29 as a moving member is disposed between the protrusion 2 a and the protrusion 28 in the axial direction of the tilting shaft 4.

  As shown in FIGS. 1 and 9, the protrusion 28 is formed with a through hole 28b extending substantially in the axial extension line of the tilt shaft 4, that is, extending in the radial direction of the tilt shaft 4. The clamp bolt 6 is rotatably located inside, and a slider 29 is screwed to the clamp bolt 6. A spring 34 is disposed between the upper end surface of the slider 29 shown in FIG. 1 and the lower end of the protrusion 28 and is a biasing means disposed on the outer periphery of the clamp bolt 6. It is biased toward the tilting shaft 4 side.

  A taper portion 28a that inclines so as to move away from the rear end surface of the holder 5 and the projecting portion 2a toward the tilting shaft 4 side (downward in FIG. 1) is provided at a location facing the rear end surface of the holder 5 and the projecting portion 2a of the projecting portion 28. Is provided. As shown in FIG. 1, the slider 29 is also formed with a tapered portion 29a formed at substantially the same inclination angle as the tapered portion 28a so as to be able to come into surface contact with the tapered portion 28a.

  In the state shown in FIG. 1, the tilt of the holder 5 is fixed with respect to the turntable 2, but in the state shown in the figure, the protrusion 2 a of the turntable 2 is tilted by the rear end surface of the holder 5 and the slider 29. It is clamped in the axial direction of the shaft 4 and cannot rotate relatively. Specifically, the taper portion 29a of the slider 29 and the taper portion 28a of the protrusion 28 are in contact with each other, the spring 34 is compressed in the axial direction, the clamp bolt 6 is in a tightened state, and the slider 29 is It is in a state of entering between the protrusion 28 and the protrusion 2a.

  In order to incline the circular saw portion 12 in the left-right direction from this state, the clamp bolt 6 is first loosened.

  By this loosening operation, the slider 29 moves to the tilting shaft 4 side (downward in FIG. 1) by the urging force of the spring 34 and its own gravity.

  By the movement of the slider 29 described above, the holding of the protruding portion 2a by the slider 29 and the rear end surface of the holder 5 is released, and the holder 5 can be tilted with respect to the turntable 2.

  Thereafter, the holder 5 is tilted at an arbitrary angle with respect to the turntable 2 by gripping the circular saw portion 12 and the clamp bolt 6 is tightened again in a state where the tilt position is held, so that the slider 29 is spring-loaded. While moving against the urging force of 34, the clamp bolt 6 moves in the axial direction, both tapered portions 28a, 29a come into contact with each other, and the slider 29 moves in the axial direction of the clamp bolt 6 so that the slider 29 moves toward the holder 5 side. In order to press the protrusion 2a, the protrusion 2a is sandwiched between the slider 29 and the holder 5, and the tilt of the holder 5 with respect to the turntable 2 can be fixed and the tilt position of the circular saw 12 can be fixed.

  It should be noted that the slider 29 bites in a relatively strong manner between the protruding portion 2a and the tapered surface 28a, and even if the clamp bolt 6 is loosened, the tilting shaft 4 side (FIG. 1) is applied by the urging force of the spring 34 and its own gravity. If the clamp bolt 6 protruding upward by the loosening operation is pushed downward, the slider 29 can be moved to the tilting shaft 4 side, and the holder 5 can be tilted with respect to the turntable 2 It can be in a state.

  The holder 5 is tilted and fixed by the slider 29 moving in the axial direction of the clamp bolt 6 as described above. Specifically, the slider 29 protrudes by the gap between the clamp bolt 6 and the through hole 28b. It also moves to the part 2a side. When there is a slight gap between the rear end surface of the holder 5 and the protruding portion 2a, the holder 5 moves or tilts so as to eliminate this gap, so that the protruding portion 2a is formed between the slider 29 and the rear end surface of the holder 5. Is pinched.

  As described above, by releasing the tilt fixing of the holder 5, the holder 5 can be tilted to the left or right with the tilt shaft 4 as a fulcrum, but the center of gravity of the motor 21 is substantially true of the holder shaft 4. Since it is located above, the circular saw 12 can be tilted with a substantially constant force on either the left or right side. When the clamp bolt 6 is loosened to release the fixed state of the holder 5 and the holder 5 is tilted to the left, the stopper 5a comes into contact with the stopper bolt 30 and the circular saw portion 12 is positioned in a state of 45 degrees to the left. In this state, after the clamp bolt 6 is tightened and the inclined position of the holder 5 is fixed, the workpiece 35 can be cut by the cutting method described above.

  Furthermore, when cutting a wide workpiece by right angle cutting, angle cutting, or inclined cutting, after pressing the workpiece 35 on the fence 3 surface and fixing it, the knob 10 is loosened, and the handle 26 is used on the front side (in FIG. 1). When pulled in the right direction), the circular saw holder 8 and the circular saw 12 move together.

  After the handle 26 is pushed down and cut, the cutting is performed while sliding the circular saw portion 12 toward the holder 5 (the state shown in FIG. 6). When the pressing force to the circular saw portion 12 is released after the end of cutting, the original upper limit position is restored by the biasing force of the spring 13.

  As described above, the table-top circular saw of the present invention can be slid, perpendicularly, angled, and angled, or combined with the above-mentioned angled cutting method and angled cutting method.

  By adopting the configuration as described above, it is not necessary to wrap the hand to the rear side of the holder 5 during the tilting operation, and the tilting operation can be performed even when there is a wall or an object behind the holder 5, The hand can reach the operation member 6 without being located on the rear side of the main body side during the tilting operation, and the operability of the tilting operation can be improved. Further, when arranging the tabletop cutting machine main body, it is not necessary to consider the space behind the holder 5 and the operation member, and the work space can be reduced in size.

  In addition, the base part contact part of this invention holder 5 is the holder 5 rear end surface, and the holder contact part of a base part is the protrusion part 2a of the turntable 2. FIG.

  Next, another embodiment of the tabletop circular saw of the present invention is shown in FIG. This embodiment is an improvement of the configuration of the tilt restricting means of the above embodiment, and the other parts are the same as those of the above embodiment, and the description thereof is omitted.

  In the present embodiment, as shown in the figure, the clamp bolt 6 is arranged so that the upper end of the clamp bolt 6 is separated from the guide bar 7, thereby widening the operation space of the clamp bolt 6 and improving the operability. Is.

Even with such a configuration, the operational effects of the above-described embodiment can be obtained. However, the through hole 28b and the clamp bolt 6 formed in the protruding portion 28 are virtually connected to the two guide bars 7. The circular saw blade 14 is inclined and extended with respect to the line, and the side surface of the circular saw blade 14 is arranged substantially parallel to the imaginary line connecting the two guide bars 7, so that the through hole 28b and the clamp bolt 6 are circular saws. It is inclined with respect to the side surface of the blade 14. Accordingly, the moving direction of the slider 29 is also inclined with respect to the side surface of the circular saw blade 14. In the above embodiment, the slider 29 moves substantially along the side surface of the circular saw blade 14 on the extended line of the side surface of the circular saw blade 14. With such a configuration, the holder 5 moves the tilt shaft 4 when the slider 29 moves. The above-described embodiment is preferable in that it is possible to prevent the tilt angle of the circular saw blade 14 from shifting even if it moves by a backlash.

11 and 12 show a sliding mechanism, that is, a guide bar and a tilting control mechanism having the same configuration as that of the above-described embodiment shown in FIGS. 1 to 9 in a table-shaped circular saw having no support member sliding on the guide bar. However, even with such a configuration, the same operational effects can be obtained.

  Next, another embodiment of the tabletop circular saw of the present invention is shown in FIGS. The present embodiment is an embodiment in which a slide mechanism different from the above-described embodiment shown in FIGS. The part which attaches | subjects the code | symbol similar to the said embodiment, and abbreviate | omits description has a function similar to the said embodiment.

  The two guide bars 7 are arranged so that a virtual line connecting the two extends in parallel with the rotation axis of the circular saw blade 14, and the circular saw portion 12 is provided at the end of the guide bar 7 on the side of the circular saw portion 12. A support member 8 is fixed so as to be swingable. The guide bar 7 can slide in a through hole 5 e formed at the upper end of the holder 5.

  In a tabletop circular saw having such a slide mechanism, the clamp bolt 6 is arranged so as to protrude between the through holes 5e as shown in the figure, so that the clamp bolt 6 has the same function as that of the above embodiment. It is possible to improve operability.

  Further, FIGS. 16 to 19 show various embodiments of the tilt regulating mechanism constituting the desktop circular saw of the present invention.

  In the embodiment shown in FIG. 16, the protrusion 5 and the clamp lever 6 are provided on the turntable 2 side, and a part of the holder 5 is sandwiched between the rear end surface of the turntable 2 and the slider 29, so It is the structure which controlled the inclination of.

  The clamp lever 6 is screwed with the protrusion 28 without being screwed with the slider 29, and when the clamp lever 6 is tightened, the slider 29 is partially pressed against the clamp lever 6 and moves downward in the figure.

  In the embodiment shown in FIG. 17, the tilt of the holder 5 with respect to the turntable 2 is restricted by sandwiching a part of the holder 5 between the rear end surface of the turntable 2 and the slider 29 as in FIG. 16. However, the inclined directions of the tapered surfaces 28 a and 29 a are reversed, and the clamp bolt 6 is configured to be screwed with the slider 29 without being screwed with the protrusion 28.

  The embodiment shown in FIG. 18 is an embodiment in which a plurality of tilt regulating mechanisms are provided. FIG. 18 is a cross-sectional plan view of the main part showing the tilt regulating mechanism.

  In this embodiment, the clamp lever 6 is screwed into a protrusion 28 provided on the holder 5, and the slider 29 is pressed against a part of the clamp lever 6 to move in the axial direction of the clamp lever 6. 29 and the holder 5 are configured to be able to sandwich the protruding portion 2a, but two clamp levers 6 and a slider 29 are provided respectively extending in the vertical direction in the figure from the center of the holder 5 and the protruding portion 28. . If any one of the clamp levers 6 is tightened, the tilt of the holder 5 with respect to the turntable 2 can be restricted (fixed).

  The clamp lever 6 is positioned on both sides of the circular saw blade 14 when the circular saw blade 14 is in a right angle position, and the operator can use either of the clamp levers 6 depending on the work situation, Workability can be improved.

  In addition, by providing a plurality of tilt fixing mechanisms, it is possible to prevent the tilt fixing from being released unexpectedly, and to improve safety.

  Yet another embodiment is shown in FIG. The embodiment shown in the figure does not have the slider 29 of the above embodiment, but has a configuration in which the clamp bolt 6 as an operation member is arranged to extend in a direction orthogonal to the axial direction of the tilting shaft 4. As in the above embodiment, it is not necessary to wrap the hand to the rear side of the holder 5 during the tilting operation, and the tilting operation can be performed even when there are walls or objects behind the holder 5, and during the tilting operation. Even if it is not located on the rear side of the main body, the operation member 6 can be reached and the operability of the tilting operation is good. Further, when arranging the tabletop cutting machine body, it is not necessary to consider the space behind the operation member, and the work space can be reduced in size.

  In the embodiment shown in FIGS. 1 to 9, the guide bar 7 is composed of two, but may be one or three.

  In the above-described embodiment, the left and right inclined structures may be used. However, in the above-described embodiment, the gear 16 and the pulleys 18 and 23 that transmit power to the right side of the circular saw blade 14 may be used. Although the guide bar 7 is disposed, a configuration in which each member is disposed on the left side opposite to the above embodiment is also good. Furthermore, the base part may be configured only by the base 1 without the turntable 2.

  1 is a base, 2 is a turntable, 2a is a protrusion, 3 is a fence, 4 is a tilting shaft, 5 is a holder, 6 is an operation member (clamp bolt, clamp lever), 7 is a guide bar, 8 is a support member, 8a Is a hole, 8b is a ball bearing, 8c is a moving member, 8d is a bolt, 9 is a support, 10 is a knob, 11 is a swing shaft, 12 is a circular saw part, 13 is a spring, 14 is a circular saw blade, 28 is The protrusion 28a is a tapered surface, 29 is a slider, and 29a is a tapered surface.

Claims (12)

A base portion on which a workpiece can be placed;
A cutting portion that houses an electric motor and rotatably supports a cutting blade that rotates by driving of the electric motor;
A support member for swingably supporting the cutting portion by a swing shaft substantially parallel to the axial direction of the cutting blade;
A holder that can be tilted with respect to the base portion by a tilting shaft that extends substantially perpendicular to the axial direction of the cutting blade and substantially parallel to the upper surface of the base portion;
At least two guide bars arranged so that one end is held by the holder and the other end extends from the holder to the base upper position;
A tilt regulating means provided on the holder for regulating the tilt of the holder with respect to the base portion;
The support member is slidably provided on at least two guide bars held immovably by the holder,
The desk cutting machine characterized in that the operation part of the tilt regulating means is provided so as to be operable from above the holder.   The tilt regulating means applies a pressing force between the base portion and the holder in a direction orthogonal to the axial direction of the swing shaft by operating the operation portion, thereby tilting the holder with respect to the base portion. The tabletop cutting machine according to claim 1, wherein The tilt restricting means has a moving member that is movable in a direction orthogonal to the axial direction of the swing shaft by the operation of the operation portion,
The tabletop cutting machine according to claim 2, wherein tilting of the holder with respect to the base portion is regulated by movement of the moving member.   4. The tabletop cutting machine according to claim 3, wherein tilting of the holder with respect to the base portion is restricted by sandwiching a part of the base portion between the moving member and the holder. Providing the base portion with a protruding portion protruding upward from the upper surface of the base portion,
3. The tabletop cutting machine according to claim 2, wherein the tilting of the holder with respect to the base portion is restricted by pressing the moving member against the protruding portion by operation of the operation portion.   2. The tabletop cutting machine according to claim 1, wherein the cutting portion can tilt at least 45 degrees in the direction of both sides of the cutting blade with the tilting shaft as a fulcrum.   The tabletop cutting machine according to claim 1, wherein the guide bar is positioned above a rotation axis of the cutting blade when the cutting portion is positioned below the swing.   The tabletop cutting machine according to claim 1, wherein the guide bar is positioned below a rotation axis of the cutting blade when the cutting portion is positioned above the swing.   2. The tabletop cutting machine according to claim 1, wherein the support member is provided with a fixing means capable of fixing the support member at an arbitrary position on the guide bar.   The tabletop cutting machine according to claim 9, wherein the fixing means is engaged with one of the two guide bars.   The tabletop cutting machine according to claim 1, wherein the operation portion of the tilt regulating means is provided in an upper portion of the holder. A base portion on which a workpiece can be placed;
A cutting portion that houses an electric motor and rotatably supports a cutting blade that rotates by driving of the electric motor;
A support member for swingably supporting the cutting portion by a swing shaft substantially parallel to the axial direction of the cutting blade;
A holder that can be tilted with respect to the base portion by a tilting shaft that extends substantially perpendicular to the axial direction of the cutting blade and substantially parallel to the upper surface of the base portion;
At least two guide bars arranged so that one end is held by the holder and the other end extends from the holder to the base upper position;
A tilt regulating means provided on the holder for regulating the tilt of the holder with respect to the base portion;
The support member is slidably provided on at least two guide bars held immovably by the holder,
The desk cutting machine according to claim 1, wherein an operation part of the tilt regulating means is provided in an upper part of a holder for holding the guide bar.