Miter saw having holder fixing mechanism

1. A miter saw comprising:

a base section having an upper surface on which a workpiece is mounted, the base section defining a frontward/rearward direction and a lateral direction perpendicular to the frontward/rearward direction;

a saw blade section rotatably supporting a circular saw blade, the circular saw blade having a rotation axis extending in the lateral direction;

a holder shaft extending in a direction perpendicular to the rotation axis and in the frontward/rearward direction;

a holder tiltable about the holder shaft in the lateral direction relative to the base section;

two guide bars disposed slidable with respect to the holder and extending in the frontward/rearward direction in parallel to each other;

a support segment fixed to the guide bars and supporting the saw blade section;

a pivot shaft disposed between the saw blade section and the support segment and extending in parallel with the rotation axis, the saw blade section being pivotable about the pivot shaft and movably supported to the support section toward and away from the upper surface; and

a holder fixing mechanism that fixes a tilting posture of the holder relative to the base section, the holder fixing mechanism comprising an operation member supported to the holder and provided with a rotatable shaft passing through a space between the two guide bars;

wherein the rotatable shaft of the operation member extends in a direction perpendicular to the holder shaft and in a direction substantially parallel with opposite side surfaces of the circular saw blade.

2. The miter saw as claimed in claim 1 , wherein the rotatable shaft of the operation member, the holder shaft, and the circular saw blade are positioned in substantially a same plane.

3. The miter saw as claimed in claim 1 , wherein the holder is tiltable laterally rightward and leftward by an angle of 45 degrees, respectively.

4. The miter saw as claimed in claim 1 , further comprising a knob engaged with the holder for stopping axial sliding movement of the guide bars.

5. The miter saw as claimed in claim 1 , further comprising an adjustment arrangement provided at the holder for finely controlling inclination of the guide bars.

6. A miter saw comprising:

a base section having an upper surface on which a workpiece is mounted, the base section defining a frontward/rearward direction and a lateral direction perpendicular to the frontward/rearward direction;

a saw blade section rotatably supporting a circular saw blade, the circular saw blade having a rotation axis extending in the lateral direction;

a holder shaft extending in a direction perpendicular to the rotation axis and in the frontward/rearward direction;

a holder tiltable about the holder shaft in the lateral direction relative to the base section;

two guide bars disposed slidable with respect to the holder and extending in the frontward/rearward direction in parallel to each other;

a support segment fixed to the guide bars and supporting the saw blade section;

a pivot shaft disposed between the saw blade section and the support segment and extending in parallel with the rotation axis, the saw blade section being pivotable about the pivot shaft and movably supported to the support section toward and away from the upper surface; and

a holder fixing mechanism that fixes a tilting posture of the holder relative to the base section, the holder fixing mechanism comprising an operation member supported to the holder and provided with a rotatable shaft passing through a space between the two guide bars;

wherein the operation member includes a part which is positioned above the two guide bars and the rotatable shaft extends from the part and passes through the space which extends between the two guide bars.

7. The miter saw as claimed in claim 6 , wherein the rotatable shaft of the operation member, the holder shaft, and the circular saw blade are positioned in substantially a same plane.

8. The miter saw as claimed in claim 6 , wherein the holder is tiltable laterally rightward and leftward by an angle of 45 degrees, respectively.

9. The miter saw as claimed in claim 6 , further comprising a knob engaged with the holder for stopping axial sliding movement of the guide bars.

10. The miter saw as claimed in claim 6 , further comprising an adjustment arrangement provided at the holder for finely controlling inclination of the guide bars.

11. The miter saw as claimed in claim 6 , wherein the rotatable shaft of the operation member extends in a direction perpendicular to the holder shaft and in a direction substantially parallel with opposite side surfaces of the circular saw blade.

12. The miter saw as claimed in claim 6 , wherein the two guide bars which extend in parallel to each other are spaced from each other so that the two guide bars lie in a single plane within the space extending between the two guide bars, and the rotatable shaft of the operation member of the holder fixing mechanism passes through the single plane within the space in a direction transverse to the single plane.

13. The miter saw as claimed in claim 6 , wherein the rotatable shaft of the operation member extends in a direction transverse to the extension direction of the holder shaft.