JP2005297319A - Table cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a table cutter which increases strength without enlarging a guard and is small-sized and inexpensive. <P>SOLUTION: The table cutter has base parts 1 and 2 on which workpieces can be mounted, a cutting part 8 which houses a motor and supports a cutting blade 10 rotated by driving the motor rotatably, and a holder 5 which supports the cutting part 8 oscillatably by a shaft 7 being an oscillating shaft approximately in parallel with the axial direction of the cutting blade 10, crosses approximately at right angles with the axial direction of the cutting blade 10, and is tiltable in relation to the base parts 1 and 2 by a tilting shaft 4 extending approximately in parallel with the base parts 1 and 2. A leg part 14a which can be arranged on the side of the cutting blade 10 when the cutting part 8 is oscillated and a guard part 14 which has a rotary shaft 4a coaxial with the tilting shaft 4 and can be rotated in linkage to the tilting of the holder 5 are provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tabletop cutting machine provided with a guard portion that suppresses scattering of chips.

  A conventional tabletop cutting machine includes a base portion on which a workpiece can be placed, a cutting portion that houses a motor and rotatably supports a cutting blade that rotates by driving of the motor, and an axial direction of the cutting blade A holder that can swing with respect to the base portion by a tilting shaft that extends substantially parallel to the axial direction of the cutting blade and substantially parallel to the upper surface of the base portion. There is a configuration having a guard that is fixed to the holder and can be arranged so as to sandwich the cutting blade when the cutting portion swings. (For example, refer to Patent Document 1.)

Japanese Utility Model Publication No. 4-28721

  The above-described conventional tabletop cutting machine can suppress the scattering of the wood pieces by the guard, but since it has a configuration in which one end is fixed to the holder, it is easily deformed by the contact of the wood pieces or an external force. It was a thing. If the guard is deformed, the cutting blade may come into contact with the guard and the guard or the cutting blade may be damaged. To avoid this, the distance between the guard and the side of the cutting blade should be set wide beforehand. It was.

  If the guard is made of an expensive material so that the guard is difficult to deform, or if the size or thickness is increased, the guard becomes larger, which increases the cost and decreases the visibility and the workability. Met.

  In particular, the guard is more easily deformed as the position of the holder is further away from the cut portion.

  An object of the present invention is to provide a desktop cutting machine that eliminates the above-mentioned drawbacks of the prior art, increases the strength without increasing the size of the guard, and is small and inexpensive.

  The above-described object is to provide 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 is substantially parallel to the axial direction of the cutting blade. A table having a holder that can swing with respect to the base portion by a tilting shaft that supports the cutting portion by a swing shaft so as to be swingable and extends substantially perpendicular to the axial direction of the cutting blade and substantially parallel to the upper surface of the base portion. A guard that has a foot portion that can be disposed on the side surface of the cutting blade when the cutting portion swings, and a rotation shaft that is coaxial with the tilting shaft and that can rotate in conjunction with the tilting of the holder. This is achieved by providing a part.

  Alternatively, a base part on which a workpiece can be placed, a cutting part that accommodates an electric motor and rotatably supports a cutting blade that rotates by driving of the electric motor, and a swing that is substantially parallel to the axial direction of the cutting blade A tabletop cutting machine having a holder that can swing with respect to the base portion by a tilting shaft that supports the cutting portion by a shaft so as to be swingable, and extends substantially perpendicular to the axial direction of the cutting blade and substantially parallel to the upper surface of the base portion. In addition, this is achieved by attaching a guard portion having a foot portion that can be disposed on the side surface of the cutting blade when the cutting portion swings to the holder and rotatably attached to the base portion.

  According to the present invention, when the cutting portion swings, the guard has a foot portion that can be disposed on the side surface of the cutting blade and a rotation shaft that is coaxial with the tilting shaft, and can rotate in conjunction with the tilting of the holder. By providing the part, the support of the guard part has become the tip of the inclined shaft near the holder and the cutting part, so it is possible to receive the load when the wooden piece hits even near the cutting part, increasing the thickness of the guard In addition, since the size is not increased, the strength can be ensured, and the material can be made of an inexpensive material, so that a desktop cutting machine having a small and inexpensive guard device can be provided.

  In addition, since the deformation of the guard part can be suppressed, the distance between the side surface of the cutting blade and the foot part can be set small, the scattering of the chips can be further suppressed, and the chip guide by the guard can be suppressed. The function can be improved and the dust collection efficiency can be improved.

  An embodiment of the tabletop cutting machine of the present invention will be described below with reference to FIGS. 1 is a front view showing an embodiment of the tabletop cutting machine of the present invention, FIG. 2 is an enlarged left side view of the main part of the tabletop cutting machine shown in FIG. 1, and FIG. 3 is an enlarged right side of the main part of the tabletop cutting machine shown in FIG. FIG. 4 is an enlarged right side view of the main part showing a state where the holder is inclined with respect to the base part from the state shown in FIG. 3, and FIG. 5 is a state where the cutting part is swung downward from the state shown in FIG. FIG. 6 is an enlarged view of a main part of FIG. 1, and FIG. 7 is an enlarged view taken in the direction of arrow A in FIG. Hereinafter, the tabletop cutting machine will be described as a tabletop circular saw.

  As shown in the figure, the table-top circular saw of the present invention is a cutting that houses a base part 1, 2 on which a workpiece can be placed, and a cutting blade 10 that houses a motor and rotates by driving of the motor. The cutting portion 8 is swingably supported by the portion 8 and the shaft 7 which is a swinging shaft substantially parallel to the axial direction of the cutting blade 10, and is substantially orthogonal to the axial direction of the cutting blade 10 and is also provided with the base portions 1, 2. A holder 5 that can be tilted with respect to the base portions 1 and 2 by a holder shaft 4 that is a tilting shaft extending substantially parallel to the upper surface is provided.

  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 20 as shown in FIG. When processing, the cutting work is performed in a state where one surface of the workpiece 20 is in contact with the pressing surface 3a of the fence 3, so that a stable cutting work can be performed. When the turntable 2 is rotated with respect to the base 1, the position of the holder 5 connected to the turntable 2 and the cutting portion 8 with respect to the fence 3 is changed, whereby the holding surface 3 a of the fence 3 and the side surface of the cutting blade 10 are changed. The workpiece 20 in contact with the fence 3 can be cut at various angles.

  As shown in FIG. 1, in the vicinity of the rear side (left side shown in FIG. 1) end of the turntable 2, a holder 5 standing upward is a tilting shaft extending substantially parallel to the side surface of the cutting blade 10 and the upper surface of the turntable 2. Are connected via a holder shaft 4. With this holder shaft 4 as a fulcrum, the holder 5 can tilt with respect to the turntable 2 (see FIG. 4).

  Further, as shown in FIG. 2, the holder 5 is provided with an arc-shaped elongated hole 5a with the holder shaft 4 as a fulcrum, and the tilting restriction screwed into the rear end of the turntable 2 is inserted into the elongated hole 5a. The shaft portion of the clamp lever 6 as a means is positioned, and the tilting of the holder 5 and the turntable 2 can be fixed and released by the operation of the clamp lever 6. That is, when the clamp lever 6 is loosened, the holder 5 can be tilted with the holder shaft 4 as a fulcrum, and the clamp 5 is tightened to fix the holder 5 at an arbitrary tilt position. Can do.

  As shown in FIG. 2, the holder 5 is configured to support a shaft 7 that is a swinging shaft, and a part of the cutting portion 8 is disposed on the shaft 7 so as to be rotatable and sandwiched between the holders 5. The cutting part 8 is connected to the holder 5 through the shaft 7 (FIG. 2).

  A spring 9 is provided on the outer periphery of the shaft 7, and the cutting portion 8 is urged by the spring 9 to swing in a direction (upward) in which the cutting blade 10 is separated from the base portions 1 and 2. Thus, the uppermost position (on the side opposite to the base) shown in FIG. The cutting process is performed by swinging the cutting portion 8 downward (base portion side) with the shaft 7 as a fulcrum against the urging force of the spring 9.

  When the cutting portion 8 is swung downward (base portion side), the cutting blade 10 enters a groove portion provided in the turntable 2 (not shown), and stops swinging by a stopper mechanism (not shown) in a state where a predetermined amount has entered. Is done. 1a shown in FIG. 1 represents the position of the cutting blade 10 when the cutting portion 8 swings most toward the base portion.

  When the cutting part 8 is swung downward (base part side) with the shaft 7 as a fulcrum, as shown in FIG. 5, the protection provided on the cutting part 8 so as to be rotatable by the action of the link 18 provided on the holder 5. When the cover 19 is rotated upward, the cutting blade 10 is exposed, thereby enabling cutting.

  The cutting portion 8 is provided with a handle 11 that can be gripped when performing the swinging operation.

  As shown in FIGS. 3 and 4, a V-shaped convex portion 5 b is provided on the front surface (the fence 3 side) of the holder 5, and a stopper bolt located on the movement locus of the convex portion 5 b on the rear surface of the turntable 2. 12 and 13 are screwed in a right angle direction. When the holder 5 is tilted, the convex portion 5b comes into contact with the head of the stopper bolt 12 or the stopper bolt 13 at a predetermined tilt angle, and the tilt position of the cutting portion 8 can be positioned. Usually, the stopper bolt 12 is provided so as to abut on the convex portion 5b when the holder 5 is tilted to a position of 45 degrees leftward, and the stopper bolt 13 is provided so as to abut on the convex portion 5b when the holder 5 is tilted at 0 degree. ing.

  In the desktop circular saw of the present invention, a guard 14 as a guard portion is attached to the front surface of the holder 5 with screws 15 as shown in the figure. Also, a cylindrical protrusion 4a is provided at the tip of the holder shaft 4 (the end on the fence 3 side), and a plate 16 fixed to the guard 14 with a screw 17 is turnable on the protrusion 4a. Is provided. The pivot shaft of the guard 14 in the present invention is the protrusion 4a.

  Further, a foot 14a that can be positioned on the side of the cutting blade 10 when the cutting portion 8 swings downward is provided at the tip of the guard 14, and the guard 14 cuts chips from the cutting toward the duct 21. A slope 14b for guiding is provided (FIGS. 6 and 7). The duct 21 is provided in the cutting part 8 and has an opening shape provided for discharging chips generated during the cutting operation to the outside of the cutting part 8, and the duct 21 includes a dust bag or a dust collector (not shown). The hose can be connected.

  By providing the guard 14 as described above, when the cut relatively thin wood piece moves to the holder 5 side over the fence 3 by the rotating wind force or contact of the cutting blade 10, the wood piece is placed on the cutting edge portion of the cutting blade 10. It is possible to suppress contact, and thereby it is possible to suppress the pieces of wood from scattering upward.

  As shown in FIG. 7, the side surface 14c of the guard 14 is an inclined surface that is inclined so that the wall thickness decreases toward the tip of the foot portion 14a. Since it moves away from the side surface of the cutting blade 10 along the side surface 14c, it is possible to suppress the wood piece from coming into contact with the cutting edge portion 10 even during the inclined cutting as shown in FIG.

  Further, the foot portion 14a of the guard 14 is configured to be positioned at a predetermined distance on the side surface of the cutting blade 10. For this reason, the chips generated during the cutting operation come into contact with the lower end of the foot portion 14a. It is possible to suppress scattering upward. Further, since the chips rotated along the cutting edge portion of the cutting blade 10 pass through the space between the guard 14 and the cutting blade 10, the flow rate of the chips can be improved, and the chips are further directed toward the duct 21. Can be discharged.

  The guard 14 is connected to the holder shaft 4 via the screw 17 and the plate 16 as described above. Since the connecting portion with the plate 16 is in the vicinity of the foot portion 14a, the guard 14 is brought into contact with a piece of wood or an external force. It becomes difficult to deform | transform, it can make it difficult for the foot part 14a to contact the cutting blade 10, and the distance between the foot part 14a and the side surface of the cutting blade 10 can be kept at a predetermined distance. For this reason, it is possible to improve the life, and it is possible to set the distance between the foot portion 14a and the side surface of the cutting blade 10 and the distance between the guard 14 and the cutting blade 10 to be smaller, thereby preventing the scattering of chips and collecting. The dust efficiency can be improved.

  Further, as described above, the guard 14 is screwed to the holder 5 and is rotatably connected to the holder shaft 4. Even when the holder 5 is tilted as shown in FIG. The distance between 14 and the cutting blade 10 can be kept at a predetermined distance, and in the same manner as described above, it is possible to prevent the scattering of chips and improve the dust collection efficiency.

  Further, the guard 14 is configured to be connected to the holder 5 and the holder shaft 4, so that the deformation of the guard 14 can be further prevented.

  In addition, since the guard 14 is configured not to be easily deformed, the guard 14 can be formed of a relatively light material such as a resin, and the weight of the product can be reduced.

  Next, another embodiment of the tabletop circular saw of the present invention is shown in FIG. In the embodiment shown in FIG. 8, the guard 14 is provided with two foot portions 14a so that the foot portions 14a can be positioned on both side surfaces of the cutting blade 10 when the cutting portion 8 swings downward. . By adopting such a configuration, it is possible to further prevent the scattering of chips and improve the dust collection efficiency.

  In the above embodiment, the guard 14 is fixed to the holder 5 with the screw 15, but the holder 5 and the guard 14 are engaged in the tilting direction of the holder 5, and the guard 14 is tilted when the holder 5 is tilted. However, any configuration may be used as long as it can rotate around the rotation axis.

  Even if the guard 14 is not fixed or engaged with the holder 5, the guard 14 may be tilted in the same manner as the holder 5 when the holder 5 is tilted. For example, the holder 5 and the holder shaft 4 are rotationally fixed. The holder shaft 4 and the guard 14 may be configured to have a rotationally fixed relationship.

  Moreover, in the said embodiment, although the guard 14 is comprised on the projection part 4a provided in the holder shaft 4 so that rotation is possible, this invention is not limited to the said structure, A base is used. The structure provided so that rotation on the separate components coaxial with the holder shaft 4 provided in the parts 1 and 2 and the structure fixed to the separate components which can be rotated may be sufficient.

  Further, in the above embodiment, the cutting part 8 is connected to the holder 5 so as to be swingable. However, a guide bar extending substantially parallel to the upper surfaces of the base parts 1 and 2 is fixed to the holder 5 or the cutting part 8. It is also possible to adopt a configuration in which the cutting part 8 can slide on the guide bar or the guide bar can slide the holder 5, that is, a configuration having a slide function.

The front view which shows one Embodiment of this invention tabletop cutting machine The main part enlarged left side view of the tabletop cutting machine shown in FIG. Enlarged right side view of the main part of the tabletop cutting machine shown in FIG. 4 is an enlarged right side view of the main part showing a state in which the holder is inclined with respect to the base part from the state shown in FIG. The front view which shows the state which rock | fluctuated the cutting part below from the state shown in FIG. 1 is an enlarged view of the main part of FIG. A direction arrow enlarged view of FIG. The A direction arrow enlarged view of FIG. 6 which shows other embodiment of this invention tabletop cutting machine.

Explanation of symbols

4 is a holder shaft, 4a is a protrusion, 5 is a holder, 14 is a guard, 14a is a foot, 14b is a slope, 15 is a screw, 16 is a plate, and 17 is a screw.

Claims (5)

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 the electric motor, and swings substantially parallel to the axial direction of the cutting blade The shaft is supported by the shaft so as to be swingable, and has 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. A tabletop cutting machine,
A guard portion that has a foot portion that can be disposed on a side surface of the cutting blade when the cutting portion swings, and a rotation shaft that is coaxial with the tilting shaft, and that can rotate in conjunction with the tilting of the holder. A tabletop cutting machine characterized by being provided. 2. The tabletop cutting machine according to claim 1, wherein the rotation shaft is a protrusion provided at the tip of the tilt shaft. The desktop cutting machine according to claim 1 or 2, wherein the guard portion has two of the foot portions, and the foot portions can be arranged on both side surfaces of the cutting blade. The desktop cutting machine according to any one of claims 1 to 3, wherein the guard portion is fixed to a part 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 the electric motor, and swings substantially parallel to the axial direction of the cutting blade The shaft is supported by the shaft so as to be swingable, and has 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. A tabletop cutting machine,
A tabletop cutting machine, wherein a guard portion having a foot portion that can be disposed on a side surface of the cutting blade when the cutting portion swings is attached to the holder and is rotatably attached to the base portion. .

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