JPS60176702A - Electric circular saw - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a portable electric circular saw, and particularly to an electric circular saw with a variable cutting angle.

[Background Art] A portable electric circular saw is generally configured so that the circular saw can be moved with two degrees of freedom relative to a material to be cut. To explain based on the drawings, in Figs. 1 and 2, reference numeral 1 is a main body that houses a motor and a speed reducer, and a circular saw 2 is installed in a fixed cover 10 provided at one end.
A base 3 is provided on the lower surface, and a handle 11 is provided on the upper surface. 12 is a movable cover. The base 3 is placed on its lower surface or on the two surfaces of the uncut material, and the front end in the direction of cutting progress is marked with an inking mark 13.
I've been kicked by 1. Now, regarding the degree of freedom of the circular saw 2, this is obtained by making the connection angle of the main body 1 to the base 3 freely adjustable, and the first degree of freedom is the cutting depth by the circular saw 2. In order to make the angle of cut variable, the main body 1 can be freely rotated in the vertical direction around a horizontal axis 15 located in front of the main body 1, and the second degree of freedom can be made to vary the cutting angle. This is achieved by making the main body 1 rotatable around the longitudinal axis 16. In addition, 4 in the figure shows a cutting angle adjustment part. Since it has two degrees of freedom in this way, the main body 1 is not directly attached to the base 3, but the shaft 1
An arm 5 connected to the base 3 at 6 is provided, a shaft 15 is provided at the other end of the arm 5, and the base 3 and the main body 1 are connected via the arm 5. Here, the cutting angle is adjusted by rotating the arm 5 and the main body 1 about the shaft 16, but in the conventional type, the circular saw 2 is perpendicular to the base 3. Since the lower surface of the main body 1 and the lower edge of the arm 5 were in contact with the upper surface of the base 3 when the cutting angle was adjusted to be in the state shown in FIG. 1 and the state shown in FIG. It was only possible to open the circular saw 2, and it was not possible to tilt the circular saw 2 in the opposite direction. Therefore, when cutting with a reverse cutting angle, the direction of the uncut material must be reversed or the user must change its position, and sometimes changing the orientation of the uncut material may also require the user to change its position. In some cases, it was not possible to change the angle of cut, making it impossible to cut at a desired cutting angle.

[Objective of the Invention] The present invention has been made in view of the above points, and its purpose is to maintain supination at all times without changing the supination of the uncut material or changing the position of the user. To provide an electric circular saw capable of performing cutting work at a cutting angle.

[Disclosure of the Invention] The present invention has a main body that includes a built-in motor and a circular saw attached to it, a base that is placed on the top surface of the uncut material, and one end that rotates in one direction at a position in front of the circular saw. It consists of an arm that is freely connected and whose other end located on the side of the circular saw is connected to the main body, and a connecting piece of the arm that connects to the base protrudes downward and there is a gap between the lower edge of the arm and the upper surface of the base. The device is characterized in that a space is provided between the bottom surface of the main body and the top surface of the base.

The present invention will be described in detail based on the illustrated embodiment shown in FIG. A connected circular saw 2 is arranged, a rectangular base 3 with a raised peripheral edge is provided on the lower surface, and a handle 11 is provided on the second surface. 12 is a movable cover. The lower surface of the base 3 is placed on the upper surface of the uncut material, and a marking 13 is attached to the curved end in the cutting direction, and one end of the arm 5 is attached to the shaft 16. A long hole 20 on an arc centered on the shaft 16 provided in the arm 5 and a square root bolt 21 inserted through the square hole 22 of the arm 5 and the long hole 20 are screwed into the square root bolt 21. A cutting angle adjustment section 4 consisting of a wing nut 23 is provided at the front end of the base 3. Also, at the other end of the arm 5 is a protrusion 1 that protrudes to the front of the main body 1 via a shaft 15.
7 are connected.

Here, in the arm 5, a hole 26 through which the shaft 16 is inserted is provided in a piece that projects downward from one end, and a hole 25 through which the shaft 15 is inserted is provided toward the back from both sides of the piece that projects upward from the other end. It is provided on a pair of protruding side pieces, and when the main body 1 is parallel to the base 3, the arm 5
A space is created between the lower edge of the main body 1 and the upper surface of the base 3, and a space is also created between the lower surface of the main body 1 and the upper surface of the base 3. Therefore, while the base 3 and the circular saw 2 are in a vertical relationship as shown in FIG. 4, the main body 1 and the circular saw 2 can be moved not only in the direction shown in FIG.
This allows for a greater degree of freedom in cutting angle.

[Effects of the Invention] As described above, the present invention [herein, the cutting angle can be adjusted in either the left or right direction, and for this reason, when cutting uncut material at a predetermined angle, It is possible to cut at a desired angle without supinating the uncut material or changing the position of the user.

[Brief explanation of drawings]

Figures 1 and 2 are front views of the conventional example, Figure 3 is a perspective view of an embodiment of the present invention, Figure 4 is a front view of the same, and Figures 5 and 6 are views with different cutting angles. 7 is an exploded perspective view of the same as above, 1 is the main body, 2 is a circular saw, 3 is a base,
5 indicates an arm. Agent Patent Attorney Ishi 1) Chief 7Figure 1Figure 2Figure 3Figure 4Figure 5Figure 6Figure jI7

Claims (1)

[Claims] (1) A main body with a built-in motor and a circular saw attached to it, a base that is placed on the top surface of the material to be cut, and a main body that is rotatably connected to the base at one end or at a position in front of the circular saw and on the side of the circular saw. The other end of the arm is connected to the main body, and the connecting piece of the arm with the base protrudes downward between the lower edge of the arm and the upper surface of the base and between the lower surface of the main tree and the upper surface of the base. The electric fliJ+ circular saw is characterized by having a space for each.