JP2013119127A - Cutting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting machine which can be reduced in size or save a space when compared with a conventional machine, or whose circular saw can be reduced in weight when compared with the conventional machine.SOLUTION: A bench cutting machine 1 includes: a base 2 on which a material to be cut can be mounted; the circular saw 4 having a circular saw edge 41 for cutting the material; and a holder 3 for swingingly supporting the circular saw 4 and standing from the base 2. A disk motor 6, a dust collecting fan 51 driven by the motor, and a dust box 52 are provided in a space in the base 2.

Description

  The present invention relates to a cutting machine that cuts a work material by rotating a cutter toward a base portion that supports the work material such as wood.

  FIG. 7 is a front view showing the structure of a conventional tabletop cutting machine 100. In the conventional tabletop cutting machine 100, a dust collection bag 856, a separate dust collector (not shown), or the like is used to collect dust generated when cutting wood or the like supported on the base portion 802. In addition, the motor that rotationally drives the circular saw blade 841 is usually provided in a circular saw portion 804 that supports the circular saw blade 841 so as to be able to swing, and is located on the side or above the circular saw blade 841.

JP 2009-179050 A JP 2009-143129 A (Motor is arranged above the circular saw blade)

  In the conventional tabletop cutting machine 100, the dust collecting back 856 comes out to the rear or upward of the main body, and the whole size is increased. In addition, when a separate dust collector is used, a wider installation space is required, and there is a disadvantage that it is inconvenient because it needs to be transported separately from the main body. Further, in the configuration in which the motor is supported by the circular saw portion 804, the weight of the circular saw portion 804 is large, and the deformation of the holder 803 that supports the circular saw portion 804 is likely to be large.

  The present invention has been made in view of such a situation, and an object of the present invention is to cut a circular saw portion that can be reduced in size or space compared with the conventional one, or can be reduced in weight compared to the conventional one. Is to provide a machine.

One embodiment of the present invention is a cutting machine. This cutting machine
A base portion on which a work material can be placed;
A circular saw part having a circular saw blade for cutting a work material;
A holder portion that supports the circular saw portion in a swingable manner and stands upright from a base portion;
A motor is disposed in the base portion.

  According to this aspect, it is possible to effectively utilize the dead space in the base portion, and to reduce the size or the space or to reduce the weight of the circular saw portion as compared with the conventional case.

The cutting machine has a dust collection mechanism for collecting dust generated during cutting,
The motor may drive the circular saw blade or at least one of the dust collecting mechanisms.

  In this case, if the circular saw blade is driven by a motor disposed in the base portion, the circular saw portion can be significantly reduced in weight. Thereby, the operability of the circular saw part is improved and the deformation of the holder part due to the weight of the circular saw part is reduced, so that the cutting accuracy can be improved. In addition, since the motor is not arranged in the circular saw part, the size in the width direction of the circular saw blade is smaller than the conventional machine where the motor is located on the side of the circular saw blade, and the circular saw part is inclined toward the base part side. A large inclination angle can be obtained. Further, the radial dimension (height dimension) of the circular saw blade is reduced with respect to the conventional machine in which the motor is positioned above the circular saw blade, and the packaging can be reduced. On the other hand, if the dust collection mechanism is driven by a motor disposed in the base portion, the dust collection performance can be improved without increasing the size of the cutting machine body. Furthermore, since the base portion is stabilized by arranging the motor in the base portion, the cutting operation can be performed stably.

  The dust collection mechanism includes at least a dust collection box for storing dust, a dust collection duct for guiding dust from the vicinity of the circular saw blade to the dust collection box, and an air flow for collecting dust. A dust collecting fan to be generated, and the dust collecting fan may be driven by the motor.

  The dust collection box and the dust collection fan may be disposed in the base portion.

  In this case, it is possible to arrange a large-diameter dust collecting fan by effectively using the space in the base portion, and it is possible to improve the dust collecting performance without increasing the size of the cutting machine body.

  The base portion may have a plurality of ventilation holes, and the ventilation holes may communicate with the dust collection box.

  In this case, the dust scattered on the surface of the base part can be sucked from the vent hole, and the dust collection performance can be further improved. Furthermore, the work material can be sucked and fixed by the vent holes, and the workability can be improved.

  The motor may be a disk motor.

  The motor includes a rotor, a stator, and a rotation shaft integrated with the rotor, and the rotation of the rotation shaft as viewed in the axial direction of the rotation shaft is performed on one of the rotor and the stator. A disk-shaped coil disk having a plurality of coils arranged in a circumferential direction around an axis is provided, and the coil disk is disposed in the axial direction of the rotating shaft on the other of the rotor and the stator. Magnetic flux generation means for generating a passing magnetic flux may be provided.

  In this case, it becomes a flat and small electric motor, and it is possible to increase the diameter of the dust collecting fan, increase the capacity of the dust collecting box, or reduce the weight of the circular saw part without increasing the size of the cutting machine body. .

  The motor and the circular saw blade may be connected and driven by a power transmission mechanism, and the power transmission mechanism may include a flexible shaft.

  In this case, by utilizing the flexible shaft, it is possible to obtain the swinging motion of the circular saw portion with a simple configuration.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  According to the present invention, it is possible to realize a cutting machine that can be reduced in size or space as compared with the prior art, or that can reduce the weight of the circular saw portion as compared with the prior art.

The front view which fractures | ruptures and shows a part of tabletop cutting machine which concerns on embodiment of this invention. The expanded sectional view of the base part of FIG. FIG. 2 is an enlarged sectional view of the disk motor of FIG. 1. The top view of the base part of FIG. The front sectional view of the tabletop cutting machine concerning an embodiment which also drives a circular saw blade with a disc motor. FIG. 6 is a front sectional view of a state where a circular saw blade is slid in the X-axis direction from the state of FIG. The front view which shows the conventional desktop cutting machine.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a tabletop cutting machine 1 according to an embodiment of the present invention. The XYZ axes that are three orthogonal axes are defined in FIG. FIG. 2 is an enlarged cross-sectional view of the base portion 2 of FIG. FIG. 3 is an enlarged cross-sectional view of the disk motor 6 of FIG. FIG. 4 is a plan view of the base portion 2 of FIG.

  In FIG. 1, the tabletop cutting machine 1 has a base part 2, a holder part 3, and a circular saw part 4. The holder portion 3 is connected to the base portion 2 and supported by the base portion 2 so as to be swingable in the axial direction of the circular saw blade shaft 42. The holder unit 3 includes a holder 31, a bar 33, and a sliding member 34. The holder portion 3 can swing about an inclination shaft (not shown) (an axis extending in the X-axis direction) as a center of swinging, whereby the circular saw blade 41 is perpendicular to the base portion 2 (XZ The cutting work can be performed in an inclined state with respect to a state parallel to the plane.

  The holder portion 3 is provided with two bars 33 extending in a direction substantially perpendicular to the holder 31 and substantially parallel to the upper surface of the base portion 2 (X-axis direction). One end of the bar 33 is connected to and supported by the holder 31, and an abutting member is connected to the other end so as to connect the two bars 33. The sliding member 34 is inserted so as to connect the two bars 33 and is slidable with respect to the bar 33. Thereby, the circular saw blade 41 is configured to be capable of changing the relative position with respect to the base portion 2 in the X-axis direction.

  The circular saw portion 4 is swingably supported by the sliding member 34 via a swing shaft 48 extending in the Y-axis direction. The circular saw portion 4 includes a motor (not shown) built in the housing 43, a circular saw blade 41 that is rotationally driven by the motor, a circular saw blade shaft 42 that rotatably supports the circular saw blade 41, and a circular saw blade 41. A circular saw cover 44 that covers a substantially upper portion, a safety cover 45 that covers a substantially lower portion of the circular saw blade, and a handle portion 46 that is held by an operator during a cutting operation. The handle portion 46 is provided with a trigger 47.

  The base unit 2 includes a fixed base 21, a turntable 22, and a fence 23 that stands on the fixed base 21. The turntable 22 is fitted to the fixed base 21 and supported by the fixed base 21 so as to be rotatable in the horizontal direction (with the Z-axis direction as the rotation axis). As shown in FIGS. 2 and 4, a plurality of ventilation holes 58 are provided on the upper surfaces of the fixed base 21 and the turntable 22, and each ventilation hole 58 passes through a dust collection passage 57 to be described later. 52A).

  As shown in FIGS. 1 and 2, the dust collection mechanism 5 includes a dust collection fan 51 attached to the disk motor 6, a dust collection box 52 that accumulates dust, and a dust collection guide that guides the dust to the suction holes 52 </ b> B of the dust collection box 52. The dust duct 53 includes a guide member 54 that guides dust from the vicinity of the work material to the dust collection duct 53, and the dust collection fan 51 and the dust collection box 52 are disposed inside the base portion 2. The dust collection box 52 has a filter 52 </ b> A for separating dust and air, and is connected (communication) to the dust collection fan 51 through an air passage 55.

  The disk motor 6 is fixed to the fixed base 21 inside the base portion 2. As shown in FIG. 3, the disk motor 6 includes a rotating shaft 61, a rotor 62, a stator 63, and a slider 64 (current supply means). The rotating shaft 61 integrated with the rotor 62 includes a rotating shaft 61. A dust collecting fan 51 is fixed. The rotor 62 has a coil disk 62A and a commutator 62B. The coil disk 62A and the commutator 62B are formed of a disk-shaped printed wiring board, and a plurality of unillustrated coils arranged in the circumferential direction around the rotating shaft 61 are formed on the coil disk 62A by a conductor pattern. . The plurality of coils are composed of a plurality of coil pieces radially formed around the rotation shaft 61, and each is formed in a substantially annular shape. For example, the coil disk 62A may be formed by stacking a plurality of printed wiring boards having conductor patterns formed on both surfaces, or a multilayer printed wiring board. The commutator 62B is formed in a flat plate shape by a plurality of unillustrated commutator pieces arranged in the circumferential direction around the rotating shaft 61, and each commutator piece is electrically connected to a corresponding coil of the coil disk 62A. .

  The stator 63 has magnetic flux generating means composed of a magnet 63A and yokes 63B and 63C. A plurality of magnets 63 </ b> A are arranged around the rotation shaft 61. The yokes 63B and 63C are made of a magnetic material such as iron, and are fixed to face the upper and lower surfaces of the coil disk 62A, respectively. The yokes 63B and 63C have, for example, a ring shape centered on the rotating shaft 61, and form a magnetic path so that the magnetic flux generated by the magnet 63A passes through the coil disk 62A in the rotating shaft direction.

  At least a pair of sliders 64 is urged to come into contact with the commutator 62B by a spring 64A, is supported so as to slide on the upper surface of the commutator 62B, and is disposed at a position facing the rotation shaft 61. . The slider 64 is made of carbon having electrical conductivity, and is connected to the trigger 47 by a power line 65.

  Next, the operation of this embodiment will be described.

  An operator connects a power cord (not shown) to an external power source (for example, a commercial power source), places a work material on the base portion 2, and then grips the handle portion 46 and operates the trigger 47, thereby making a circular saw blade. The drive motor (not shown) 41 and the disk motor 6 are energized to rotate, and the circular saw blade 41 rotates, and at the same time, the dust collecting fan 51 rotates. When the operator depresses the handle portion 46, the safety cover 45 rotates to expose the circular saw blade 41, and the workpiece is cut by sliding the circular saw portion 4 along the bar 33. . Dust generated by the cutting operation is sucked into the dust collecting duct 53 from the guide member 54 together with the air by the suction air (air flow in the suction direction) generated by the dust collecting fan 51 as shown by the broken arrow in FIG. Via the suction hole 52B, it is conveyed to the dust collection box 52. Only dust is collected in the dust collection box 52, and the air is discharged to the outside through a filter 52 </ b> A and a dust collection fan 51 through a wind window (not shown). 1 indicates that the circular saw portion 4 is swung to the base portion 2 side by the swing shaft 48, and the broken line B indicates that the circular saw portion 41 is slid forward (to the right in the drawing) along the bar 33. A state in which the base member 2 is swung by the rocking shaft 48 from the moved state is shown.

  In the present embodiment, by utilizing the space inside the base portion 2 and disposing the disk motor 6, it is possible to provide the large-diameter dust collecting fan 51 without increasing the size of the product. The performance can be dramatically improved. Furthermore, by providing the base portion 2 with the vent hole 58 connected to the dust collection box 52, suction force is generated by the rotation of the dust collection fan 51, so that the work material can be adsorbed and fixed, and workability is improved. Dust scattered on the upper surface of the base portion 2 can be collected from the vent hole, and the dust collection performance can be further improved. Further, since the drive motor of the dust collection fan 51 is the disk motor 6 which is a flat and small electric motor, the diameter of the dust collection fan 51 or the dust collection box 52 is increased without increasing the size of the tabletop cutting machine 1 main body. Large capacity can be realized. Although the disk motor 6 is used as the drive motor for the dust collection fan 51, the dust collection rate can be improved even with a motor similar to that generally used in a tabletop cutting machine, but the size of the main body is increased. Therefore, it is most effective to use a flat motor in which the axial dimension of the motor is shorter than the radial dimension.

  In the above-described embodiment, the case where the circular saw blade 41 is driven by a motor different from the disk motor 6 has been described, but the circular saw blade 41 is driven via the flexible shaft by the disk motor 6 disposed inside the base portion 2. It is good also as composition to do. Such a configuration will be described with reference to FIGS. FIG. 5 is a front sectional view of the tabletop cutting machine 10 according to the embodiment in which the circular saw blade 41 is also driven by the disc motor 6. FIG. 6 is a front sectional view of a state where the circular saw blade 41 is slid in the X-axis direction from the state of FIG. In these drawings, parts other than the configuration in which the circular saw blade 41 is driven by the disk motor 6 are as already described in FIG. 1 and the like, and these parts are shown in a simplified manner.

  The power transmission mechanism 7 transmits the torque of the disk motor 6 to the circular saw blade 41, includes a flexible shaft, and enables the circular saw portion 4 to tilt and swing relative to the base portion 2. The power transmission mechanism 7 includes a first pulley 71, a second pulley 72, a belt 73, a first flexible shaft 74, a second flexible shaft 75, a first pinion 76, a first gear 77, and a second gear. A pinion 78 and a second gear 79 are provided.

  The first pulley 71 is attached to the rotating shaft 61 of the disk motor 6 and rotates together with the rotating shaft 61. The rotation of the first pulley 71 is transmitted to the second pulley 72 via the belt 73. The first flexible shaft 74 is attached to the second pulley 72 and rotates together with the second pulley 72. The rotation of the first flexible shaft 74 is transmitted to the second flexible shaft 75 by the first pinion 76 and the first gear 77. The first gear 77 includes a gear portion 77 </ b> A that meshes with the first pinion 76 and a rotation transmission portion 77 </ b> B that transmits a rotational force to the flexible shaft 75. The rotation transmitting portion 77B supports one end of the flexible shaft 75, and transmits the rotation by making the support portion non-circular (two-sided width, square shape, etc.).

  The rotation of the second flexible shaft 75 is transmitted to the circular saw blade 41 by the second pinion 78 and the second gear 79. The second pinion 78 includes a gear portion 78A that meshes with the second gear 79, and a rotational force transmission portion 78B that transmits the rotational force from the flexible shaft 75. The rotational force transmitting portion 78B supports the other end of the flexible shaft 75, and transmits the rotation by making the support portion non-circular (two-sided width, square shape, etc.). The rotational force transmitting portion 78B has a divided structure and expands and contracts as the circular saw portion 4 slides in the X-axis direction (see FIG. 6). An extendable cover may be provided so as to cover the flexible shaft 75 to prevent dust from entering the rotational force transmitting portions 77B and 78B. Note that both ends of the flexible shaft 75 are non-circular (two-sided, quadrangular, etc.) and are fitted to the support portions of the rotation transmitting portions 77B and 78B.

  By driving the circular saw blade 41 with the disk motor 6 as described above, it is not necessary to provide a motor in the circular saw portion 4, and the circular saw portion 4 can be significantly reduced in weight. Thereby, since the deformation of the holder part 3 due to the weight of the circular saw part 4 is reduced, the cutting accuracy is improved and the weight of the product is reduced by reducing the thickness of the holder part 3 and the workability associated therewith is improved. Can do. Further, since it is not necessary to provide a motor for the circular saw portion 4, the size of the motor of the circular saw portion 4 is omitted from the configuration in which the motor as shown in FIG. be able to. That is, the portion surrounded by the broken line in FIG. 5 can be eliminated. Therefore, the dimension in the height direction (Z direction) can be suppressed. In particular, since packing is performed in a state where the circular saw portion 4 is swung toward the base portion 2 side at the time of packing, the packing box can be made small.

  In the case of the configuration in which the circular saw blade 41 is driven by the disk motor 6, the dust collection mechanism 5 described with reference to FIG. Also in this case, the effect of reducing deformation and reducing the thickness of the holder portion 3 can be obtained.

  The present invention has been described above by taking the embodiment as an example. However, it will be understood by those skilled in the art that various modifications can be made to each component of the embodiment within the scope of the claims.

1. Tabletop cutting machine 10. Desktop cutting machine2. Base part 21. Base 22. Turntable 23. Fence 3. Holder part 31. Holder 33. bar
34. 3. sliding member Circular saw part 41. Circular saw blade 42. Circular saw blade shaft 43. housing
44. Circular saw cover 45. Safety cover 46. Handle part 47. Trigger 48. 4. Swing shaft Dust collection mechanism 51. Dust collector fan 52. Dust collection box
53. Dust collection duct 54. Guide member 55. Air passage 56. Dust collection bag 57. Dust collection passage 6. Disc motor 61. Rotating shaft 62. Rotor 62A. Coil disk 62B. Commutator 63. Stator 63A. Magnet 63B, 63C. York 64. Slider 64A. Spring 65. 6. Power line Power transmission mechanism 71. First pulley 72. Second pulley 73. Belt 74. First flexible shaft 75. Second flexible shaft 76 First pinion 77. First gear 77A. Gear part 77B. Rotation transmission unit 78. Second pinion 78A. Gear part 78B. Rotation transmission unit 79. Second gear

Claims (8)

A base portion on which a work material can be placed;
A circular saw part having a circular saw blade for cutting a work material;
A holder portion that supports the circular saw portion in a swingable manner and stands upright from a base portion;
A cutting machine characterized in that a motor is disposed in the base portion. The cutting machine has a dust collection mechanism for collecting dust generated during cutting,
The cutting machine according to claim 1, wherein the motor drives the circular saw blade or at least one of the dust collecting mechanisms.   The dust collection mechanism includes at least a dust collection box for storing dust, a dust collection duct for guiding dust from the vicinity of the circular saw blade to the dust collection box, and an air flow for collecting dust. The cutting machine according to claim 2, further comprising a dust collection fan to be generated, wherein the dust collection fan is driven by the motor.   The cutting machine according to claim 3, wherein the dust collection box and the dust collection fan are disposed in the base portion.   The cutting machine according to claim 3 or 4, wherein the base portion has a plurality of ventilation holes, and the ventilation holes communicate with the dust collection box.   The cutting machine according to any one of claims 1 to 5, wherein the motor is a disk motor.   The motor includes a rotor, a stator, and a rotation shaft integrated with the rotor, and the rotation of the rotation shaft as viewed in the axial direction of the rotation shaft is performed on one of the rotor and the stator. A disk-shaped coil disk having a plurality of coils arranged in a circumferential direction around an axis is provided, and the coil disk is disposed in the axial direction of the rotating shaft on the other of the rotor and the stator. The cutting machine according to any one of claims 1 to 5, further comprising a magnetic flux generation means for generating a passing magnetic flux.   The cutting machine according to any one of claims 1 to 7, wherein the motor and the circular saw blade are connected and driven by a power transmission mechanism, and the power transmission mechanism includes a flexible shaft.

Images