JP2001300901A - Lower limit position setting device for desk circle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a lower limit position adjusting operation of a circular saw part of a table circular saw easy. SOLUTION: A holder 4 is disposed in upright behind a base 1, and a circular saw part 7 is vertically swingably to a base 1 upper face is provided at an upper end of a holder 4. A bolt 19 pushed by a spring 18 if fitted by screwing to the circular saw part 9, and a stopper 4a abutting opposed to a bolt 19 is formed to the holder 4. The bolt 19 is made rotatable by a hand so that the bolt 19 abuts against the stopper 4a at any position when the circular part 7 is swung downward, made easy to transfer vertically, and adjustment of a lower limit position of the circular saw part 7 is made simple.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for setting a lower limit position of a desk circle.

[0002]

2. Description of the Related Art As a conventional tabletop cutting machine provided with a lower limit position setting device, there has been one disclosed in Japanese Utility Model Laid-Open No. 62-203002.

[0003] In this lower limit position setting device, a method of fixing a bolt with a wing nut when positioning a bolt at an arbitrary position has been adopted.

[0004] Further, in the conventional apparatus, a nut is tightened by a tool to position the bolt.

[0005]

As described above, the conventional lower limit position setting device has a disadvantage that the second operation is required to fix the bolt.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to make it easier to adjust the lower limit position of the circular saw.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a desktop having a holder standing upright behind a base for supporting a material to be cut and having a circular saw at the upper end of the holder so as to be vertically swingable with respect to the upper surface of the base. At the circular saw, a bolt pressed by a spring is screwed into the circular saw, a stopper is formed on the holder to abut against the bolt, and the circular saw is pivoted down to an arbitrary position. This is achieved by allowing the bolt to move up and down so that the bolt abuts on the stopper, regulating the lower limit position of the circular saw portion, and adjusting the cut amount of the workpiece.

[0008]

1 to 8 show an embodiment of the present invention.
This will be described below.

A turntable 2 is embedded in the center of the base 1 so as to be rotatable in the horizontal direction so that the upper surface of the turntable 2 is flush with the upper surface of the base 1. A cutting material 40 such as wood is placed on the upper surfaces of the base 1 and the turntable 2. A fence 3 that supports the side surface of the workpiece 40 is fixed to the upper surface of the base 1.

A holder 4 is erected at the rear end of the turntable 2, and a circular saw 7 is supported above the holder 4 via a shaft 6 so as to be vertically swingable with respect to the upper surface of the base 1.
A spring 8 for urging the circular saw 7 upward is provided between the holder 4 and the circular saw 7.

The circular saw 7 includes a spindle 9 and a saw blade 1.
2, a gear case 13 integrally forming a saw cover that covers the upper half of the saw blade 12, and a motor 14 for driving the saw blade 12.
And a handle 17 and the like.

Below the gear case 13, a horizontally extending spindle 9 is provided.
1, a saw blade 12 is attached to the tip of a spindle 9 via a bolt 20. A motor housing 16 is provided on a side surface of the gear case 13, and a motor 14 for driving the saw blade 12 is provided therein. The rotation of the motor 14 is transmitted to the saw blade 12 via a pinion at the end of the motor shaft of the motor 14 rotatably supported by the bearing 15 and a gear mounted on the spindle 9.

On the upper surface of the turntable 2, a blade plate (not shown) having a groove into which the saw blade 12 enters is fixed at the center. When it descends from the upper surface, it penetrates into the groove of the blade plate to prevent the cut material 40 from fuzzing on the finished surface.

A spring 18 is embedded in the gear case 13 of the circular saw portion 7, and a bolt 19 pressed by the spring 18 is screw-fitted, and the bolt 19 abuts against the lower end of the boss 13a of the gear case 13. A stopper 4a is provided on the front (right side in FIG. 1) of the holder 4. The stopper 4a is mounted so as to face a position where the stopper 4a comes into contact with the bolt 19 by swinging of the circular saw portion 7. The upper surface (bolt contact surface) of the stopper 4a is formed as a concave arc connecting the contact point between the bolt 19 and the stopper 4a within the lower limit position restriction range of the circular saw portion 7.

In the above configuration, when cutting the workpiece 40 as shown in FIG. 3, the circular saw portion 7 is lowered by the handle 17 so that the bolt 19 comes into contact with the upper surface of the stopper 4a and the cutting is completed. Press down.

As shown in FIG. 5, the work of cutting the workpiece 40 halfway is performed when the joining plate 41 is joined to the workpiece 40 as shown in FIGS. 7 and 8. In this case, the lower limit position of the saw blade 12 is set by lowering the circular saw part 7 to an arbitrary cutting position, and by manually rotating the bolt 19 on the upper surface of the stopper 4a at this position, bringing the saw blade 1 into contact.
Set the lower limit position of 2. At this time, the gear case 13 and the bolt 19 are pressed by the spring 18 so that the bolt 19 rotates and the position does not shift.

After setting the cut lower limit position, the same cut depth can be continuously provided to the workpiece 40.

[0018]

According to the present invention, since the gear case and the bolt are pressed by the spring, and the screw fitting portions of the gear case and the bolt are pre-pressed to each other, as long as no external rotational force is applied. The bolt does not rotate and the position does not shift. Since the bolt can be rotated by hand, the lower limit position of the circular saw can be easily adjusted without tools.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the desk circle of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an overall side view of the desk circle according to the present invention when cutting is completed.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a side view of the desk circle according to the present invention when the cutting amount is regulated and the cutting is completed.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a side view showing an example of a joint between the workpiece and the joint plate.

FIG. 8 is a front view showing an example of a joint between the workpiece and the joint plate.

[Explanation of symbols]

4 is a holder, 4a is a stopper, 7 is a circular saw, 12 is a saw blade, 13 is a gear case, 18 ... spring, 19 is a bolt, and 40 is a workpiece.

Claims (1)

[Claims] 1. A desktop circular saw having a holder standing upright behind a base for supporting a material to be cut, and having a circular saw at the upper end of the holder so as to be vertically swingable with respect to the upper surface of the base. A bolt pressed by a spring is screwed into the saw, and a stopper is formed on the holder to abut against the bolt, and when the circular saw is swung downward, the bolt is inserted into the stopper at any position. A lower limit position setting device for a desk circle, wherein a bolt can be moved up and down so as to abut, and a lower limit position of a circular saw portion is regulated to adjust a cutting amount of a workpiece.