JPH11226905A - Angle indexing unit for bench cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an operating efficiency of a cutting angle matching by forming female threads on a spring container of a turntable, and vertically displaceably mounting a screw at the threads. SOLUTION: A steel ball 11 is always urged to an upper surface of a base 1 by a spring 12 contained in a turntable 4, and mounted to interlock with a rotation of the turntable 4. Female threads 15 are formed in a containing part of the spring 12 of the turntable 4, and a screw 16 is vertically displaceably mounted. The ball 11 is vertically moved to regulate a compression load of the spring. Thus, if a rotating load of the turntable 4 is large, the screw 16 is rotated to reduce he compression load of the spring 12. And, hence, the rotating load of the turntable 4 is reduced, thereby improving an operability at the time of cutting angle matching.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an angle index device for a tabletop cutting machine for setting a cutting angle.

[0002]

2. Description of the Related Art For example, Japanese Utility Model Publication No. 5-6010 discloses a conventional cutting angle indexing device for a tabletop cutting machine. As shown in FIG. 4, the conventional tabletop cutting machine cuts the workpiece 3 at right angles as well as diagonally, that is, as shown in FIG.
Turn the turntable 4 in the horizontal direction as shown in
There are many opportunities for cutting by changing the angle of the saw blade 8 with respect to the workpiece 3. For this reason, the recesses 13 are formed on the base 1 at some frequently used angle positions within the rotation range of the turntable 4. On the other hand, an index device for setting the cutting angle of the material 3 to be cut by a steel ball 11 provided on a lower surface of the turntable 4 mounted on the base 1 so as to press the concave portion 13 via a spring 12 such as a compression coil spring. Constitute.

[0003] The steel ball 11 is
The turntable 4 is always pressed against the base upper surface 1a by a constant pressing force by a spring 12 housed therein, and is moved together with the turntable 4 when the handle 14 is held. As shown in FIG. 5, the recesses 13 are provided at 0 ° (perpendicular) and 45 ° left and right, and the steel ball 11 moving on the base upper surface 1a by the rotation of the turntable 4 fits into the recess 13 so that the material to be cut is formed. When the cutting angle of No. 3 is 0 ° or 45 ° left and right, the cutting angle can be set by one-touch operation.

[0004]

The tabletop cutting machine having the above-described cutting angle stopper device suppresses backlash of the turntable 4 when the steel ball 11 is set in the concave portion 13, and furthermore, in manufacturing the spring 12. The spring 12
Was set to a large compression load. For this reason, when the turntable 4 is rotated by holding the handle 14 and the turntable 4 is rotated to an arbitrary cutting angle without the concave portion 13, the steel ball 11 detached from the concave portion 13 is lifted to the base upper surface 1a. As a result, the spring 12 is compressed, and the rotation load of the turntable 4 increases. Therefore, when it is desired to slightly turn the turntable 4 such as to finely adjust the turning angle of the turntable 4, it is difficult to turn the turntable 4 and the workability at the time of adjusting the cutting angle is deteriorated.

An object of the present invention is to eliminate the above-mentioned conventional disadvantages and to improve the efficiency of the cutting angle adjusting operation.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a base having a stopper for positioning a cutting angle, a turntable embedded in the base so as to be rotatable in a horizontal direction, and being sandwiched between the turntable and the base. A table cutter having a steel ball that is pressed against the base surface by a spring stored in the turntable and that is interlocked with the rotation of the turntable, wherein a female screw is formed in a spring storage portion of the turntable. This is achieved by allowing the screw attached to the female screw to be vertically displaceable.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a vertical sectional view of the angle index. 2 is a side view of the tabletop cutting machine, FIG. 3 is a plan view showing a cutting angle stopper position, FIG. 4 is a plan view around the base at the time of right angle cutting, and FIG. 5 is a plan view around the base at the time of angle cutting.

In FIG. 2, a workpiece 3 is supported on a fence 2 fixed to the rear of a base 1, a turntable 4 is buried in the center of the base 1 so as to be freely rotatable in a horizontal direction, and a holder is provided behind the turntable 4. 5 is erected. A circular saw part 10 having a handle 7 for cutting vertically above and below the holder 5 so as to be able to swing up and down with respect to the upper surface of the base 1 around a shaft 6
Is supported. The circular saw unit 10 includes a saw blade 8 and a motor unit 9 that drives the saw blade 8 to rotate in the arrow direction. When cutting the workpiece 3, the cutting handle 7 is pushed down.

As shown in FIG. 1, a steel ball 11 is mounted so as to always press the base upper surface 1a by a spring 12 housed in the turntable 4 and interlock with the rotation of the turntable 4. A female screw 15 is formed in the spring 12 housing portion of the turntable 4 and a female screw 16 is attached to the female screw 15 so as to be vertically displaceable, so that the steel ball 11 moves up and down,
The compression load of the spring 12 can be adjusted. As shown in FIG. 3, in the present embodiment, the concave portions 13 are provided on the base upper surface 1a at positions of 0 ° (perpendicular) and 45 ° left and right.

In the above configuration, when the turntable 4 is turned to an arbitrary cutting angle position by holding the handle 14 and the turning load of the turntable 4 is large, the screw 1
6 is rotated to reduce the compression load of the spring 12, the rotation load of the turntable 4 is reduced, and the workability at the time of adjusting the cutting angle is improved.

In this embodiment, the angle stopper position is set to 0 °
And 45 ° left and right, but the angle stopper position and the number of steel balls may be further increased.

[0012]

According to the present invention, a female screw is formed in the spring accommodating portion of the turntable, and the screw is mounted so as to be vertically displaceable so that the compression load of the spring can be adjusted. The rotation load of the table can be reduced, and the workability at the time of adjusting the cutting angle is improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of an angle index of a desk cutting machine according to an embodiment of the present invention.

FIG. 2 is a side view of the tabletop cutting machine.

FIG. 3 is a plan view showing a cutting angle stopper position.

FIG. 4 is a plan view around the base when cutting at right angles.

FIG. 5 is a plan view around a base at the time of angle cutting.

FIG. 6 is a longitudinal sectional view of a conventional angle index.

FIG. 7 is a longitudinal sectional view showing a state where a steel ball has come off in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base, 1a ... Top surface, 4 ... Turntable, 11 ...
Steel ball, 12 ... spring, 13 ... stopper,
15 ... female screw, 16 ... screw.

Claims (1)

[Claims] 1. A base having a stopper for positioning a cutting angle, a turntable embedded rotatably in a horizontal direction with respect to the base, sandwiched between the turntable and the base, and housed in the turntable. In a tabletop cutting machine provided with a steel ball that is pressed against the base surface by the provided spring and that is interlocked with the rotation of the turntable, a female screw is formed in the spring storage portion of the turntable, and the female screw is attached to the female screw. An angle indexing device for a desktop cutting machine, characterized in that the screw is freely displaceable in the vertical direction.