JPS5914169Y2 - Automatic induction safety cover for portable circular saws - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device that automatically guides opening and closing of a safety cover of a portable circular saw.

Conventionally, the light part of the saw blade exposed on the lower surface of the saw blade base 1 of a portable circular saw was covered with a safety cover that rotates forward and backward using the bearing of the saw blade shaft. .

This type of saw blade has a complicated shape, which increases the number of man-hours required to manufacture it. Furthermore, the part of the saw blade cover above the base plate 1 is large, resulting in a large amount of material cost. Furthermore, with this conventional type, The structure is fan-shaped toward the axis, and the tip of the saw blade is shaped to cover the tip of the saw blade, so saw dust returns to the cutting material, making it completely unusable for models with an airtight structure. .

The purpose of this invention is to eliminate all of these drawbacks, and in order to achieve this purpose, a shaft 4 with an automatic guide cover attached to the base plate 1 is installed parallel to the saw blade outlet 2 along the cutting direction of the saw blade. The automatic guide cover 3 is pivoted on the upper block 8, and the saw cutting direction side, that is, the advancing direction end 6 of the automatic guide cover 3 is placed in the direction opposite to the saw blade outlet 2 of the base plate 1 with respect to the rear end 7, that is, the upper side of the base plate. It is formed by twisting the saw 9 by about 90 degrees and standing up, and is set so as to be freely rotatable outward from one side of the saw 9 or both left and right sides as appropriate.

To explain this with reference to the attached drawings showing an embodiment of this invention, before starting, as shown in Figs. A presser spring 5 is inserted into the shaft 4. At this time, a notch 10 larger than the spring wire diameter and spring length of the presser spring 5 is provided in the automatic guide cover 3, and the spring 5 is hooked onto the base plate 1. When the saw 9 is left unattended with the automatic guide cover 3 always hanging downward, it completely covers the saw's blade edge 11, protecting the blade edge 11 and preventing danger. It is designed to complete its mission as a safety cover for prevention.

This automatic guiding cover 3 is configured so that when the saw 9 moves forward toward the workpiece 12, the tip 13 of the workpiece 12 reaches the end 6 in the automatic guiding cover advancing direction, as shown in FIGS. 4 and 5. Hold the twisted cover at an angle of about 90 degrees with the saw tip 1 below the base plate 1.
The upper surface of the workpiece 12 is pushed up and spread away from the base plate 1, and the upper surface of the workpiece 12 is in close contact with the lower surface of the base plate 1, so that the base plate 1 moves forward and performs the cutting process. The cover 3 is automatically pushed open by the tip 13 of the workpiece without using any human hands, and when the cutting work is finished, the automatic guidance cover 3 closes and covers the saw blade edge 11 automatically by the presser spring 5. This is what we do.

With the above-mentioned structure, the upper movement guiding cover 3 opens and closes without requiring any human intervention, completely protecting the cutting edge 11 and preventing dangers during work and handling, and collecting cutting dust. By perfectly adapting to the installation of the cover 14, etc., we have achieved the 6 which fully exhibits outstanding effects such as improving work efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG.
A side view of this invention when the 8-motion guide cover 3 covers the cutting edge 11 before starting work, Figure 2 is a perspective view of the base plate in the state shown in Figure 1, and Figure 3 is the saw blade outlet. FIG. 4 is a front view of the bottom side of the base plate 1 when the automatic guide covers 3 are installed on both the left and right sides of the workpiece 12, and FIG. FIG. 5 is a side view when it is being pushed upward by the material 12, and FIG. 5 is a perspective view of the base plate in the state shown in FIG. 4. In the figure, 4 is the shaft, 5 is the presser spring, 6 is the advancing direction end of the automatic guidance cover, 7 is the rear end of the automatic guidance cover, 8 is the block, 9 is the saw, 10 is the notch, and 13 is the edge of the workpiece. Tip, 14
15 is a cutting dust collection cover, 15 is a handle, 16 is a bottom part of the cutting dust collection cover, 17 is a switch, and 18 is a base plate mounting screw hole.

Claims (1)

[Scope of utility model registration request] In a portable circular saw, a saw blade outlet 2 is provided on a base plate 1 along the direction of cutting progress, and a shaft 4 parallel to the saw blade outlet 2 is supported by a block 8 on the base plate 1. A rotatable automatic guidance cover 3 with a part shaped like a door is attached to the shaft, and
The end 6 of the automatic guidance cover 3 in the cutting progress direction is twisted 90' in the direction opposite to the saw blade outlet 2 with respect to the rear end 7, and the automatic guidance cover is attached by a presser spring 5 inserted into the shaft 4. Tension is applied so that the rear end 7 of 3 is always vertical,
Automatic induction safety cover on portable circular saw