Both-shaft rotary file

Abstract

To solve the problem that since a conventional rotary file used to deburr a circular hole has a small contact part for a circular hole circumferential part, the rotary file may be flicked or slip because of unstable contact.SOLUTION: A conic file part 3 has a maximum diameter larger than the diameter of a circular hole 7 bored in a distribution board etc., and a circumferential part of the file part 3 comes into uniform contact with a circumferential part of the circular hole 7 to stabilize rotation, and a draw shaft side 2b and a push shaft side 2a are arranged before and behind a drive shaft 2 penetrating the file part to selectively perform outside rotary deburring in a pushing state shown in Fig. 10 and rotary deburring in a drawing state from the inside with an iron plate 6 sandwiched shown in Fig. 11 by replacement of shafts, so that the deburring work becomes stable without flicking nor slipping.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a rotary file suitable for removing burrs that occur on the inside and outside of the circumference of a hole when a round hole for passing an electric wire through is drilled in a box such as a distribution board. The rotary drive source shall be attached to an electric screwdriver or the like. [Background technology]

[0002] The most common method for removing burrs from a round hole is to use a semi-circular hand file or a rotary file as shown in Figure 1. Summary of the Invention [Problem to be solved by the invention]

[0003] Deburring a round hole with a semi-round bar-shaped manual file is inefficient and the finish is prone to unevenness. Deburring a round hole with a rotary file as shown in Figure 1 is more efficient than a manual file, but the contact between the rotary file and the circumference of the round hole is small, so the deburring is unstable and there is a risk of injury from bouncing or slipping.

[0004] To provide a rotary file which can safely and quickly deburr a round hole without the rotary file being bounced or slipped during the deburring of the round hole, and which allows the user to select whether to deburr the inside or outside of the round hole by replacing the drive shaft since the drive shaft is provided in front and behind the file part. [Means for solving the problem]

[0005] A polishing tool comprising a drive means and a polishing member attached to a drive shaft driven by the drive means, the polishing member being conical in shape and having a file portion formed in the conical portion, the drive shaft being fixed to the polishing member by penetrating the apex of the cone and the center portion on the opposite side, the drive shaft protruding a predetermined length from the apex and the bottom surface of the cone, and one of the protruding portions being connected and fixed to the drive means. Effect of the Invention

[0006] In the present invention, since the file portion is cone-shaped, it is pressed with uniform force against the entire circumference of a circular hole in a distribution board or the like, so that the file portion rotates stably without bouncing or slipping, and removes burrs.

[0007] To remove burrs on the outside of the round hole, the pushing shaft side 2a of the drive shaft 2 is attached to an electric screwdriver and rotated while pressing the file part against it to remove the burrs.

[0008] For burrs on the inside of the round hole, the pulling shaft side 2b of the drive shaft 2 is passed through the round hole from the inside of the distribution board, and the iron plate is clamped by attaching it to an electric screwdriver, and the burrs are removed by pulling it to the front side while rotating the file part. [Brief description of the drawings]

[0009] [Figure 1] Conventional rotary file [Diagram 2] FIG. 2 is a side view of the double-shaft rotary file according to the present invention. [Diagram 3] 2 is a cross-sectional view taken along the line AA in FIG. [Figure 4] This is a rear view of only the file portion. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 1 is a perspective view of the present invention. [Figure 8] FIG. 2 is a partial cross-sectional view of an example of use of the pusher of the present invention. [Figure 9] FIG. 2 is a partial cross-sectional view of an example of use of the present invention. [Figure 10] FIG. 1 is a perspective view of an example of use of the push button of the present invention. [Figure 11] FIG. 1 is a perspective view of an example of use of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The polishing tool of the present invention is composed of a driving means 1 such as an electric screwdriver, a driving shaft 2 driven by the driving means 1, and a conical file part 3 having a through hole 5 through which the driving shaft 2 passes.

[0010] Fig. 2 shows an embodiment of a double-shaft rotary file according to the present invention. In Fig. 2, a file part 3 having a shaft through hole is passed to the center of a drive shaft 2, and welding 4 is performed to fix the drive shaft 2 and the file part 3.

[0011] The surface of the conical file portion 3 is notched so that the file portion can be deburred and polished with the same efficiency whether the file portion rotates to the left or right. The file portion 3 may also be formed by solidifying abrasive grains such as silicon carbide into a cone shape.

[0012] According to the above-mentioned configuration, for burrs formed at the outer corners of the hole 7 formed in the iron plate 6 or the like, the pushing shaft side 2a of the drive shaft 2 is attached to the driving means 1 and rotated while being pressed against the driving means 1, whereby the burrs can be removed as shown in FIG.

[0013] To remove burrs that may occur at the inner corners of the hole 7, the pulling shaft side 2b of the drive shaft 2 is attached to the driving means 1 in such a manner that the iron plate 6 is sandwiched through the hole 7 from the inside of the distribution board, and the burrs can be removed by rotating the drive shaft 2 while pulling it toward the driving means 1 as shown in FIG. 11.

[0014] The above-mentioned double-shaft rotary file has a trapezoidal cross section with a conical file portion 3 formed in one direction, but it may also have a diamond-shaped cross section with the bases of the conical file portions 3 back-to-back in the center of the shaft. [Explanation of symbols]

[0015] 1. Driving means 2 Drive shaft 2a Push shaft side 2b Pull shaft side 3 File section 4 Welding 5 Through holes 6. Iron Plate 7 Molded Round Hole 8. Bali 9 Distribution Board

Claims

[Claim 1] A polishing tool comprising a drive means and a polishing member attached to a drive shaft driven by the drive means, the polishing member being conical in shape and having a file portion formed in the conical portion, the drive shaft being fixed to the polishing member by penetrating the apex of the cone and the center portion on the opposite side, the drive shaft protruding a predetermined length from the apex and the bottom surface of the cone, and one of the protruding portions being connected and fixed to the drive means.

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