JP2009262269A - File - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a file easy to carry despite the fact that the file has a sufficient length of grinding section and capable of grinding both flat and curved blades. <P>SOLUTION: This file formed by adhering an abrasive material to the surface of a file body 1 comprises front and rear surfaces 30, 31 of a flat file body 1 which has a gradually changed thickness therebetween and projecting curved surfaces 32, 33 which form both side surfaces joining the front and rear surfaces 30, 31 to each other and which are gradually changed according the change of the thicknesses. The thickness between the front and rear surfaces 30, 31 is gradually reduced toward the end of the file body 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hand-held file in which an abrasive material such as fine diamond particles is attached to the surface of a file main body.

  A hand-held file (usually a diamond file) in which diamond particles are attached to the surface of the file body by means of electrodeposition or the like is known.

  Conventional diamond files have a circular cross section or a square cross section. As a hand-held file in which an abrasive is attached to the surface of a file body, Patent Document 1 discloses a file body having a circular, elliptical, or diamond-shaped cross section. In Patent Document 2, the rod-shaped polishing part is ceramic, and the cross-sectional shape is an ellipse, and Patent Document 3 is a hand-held file in which a sandpaper is pasted on the file body. In addition to a circular shape or an arc shape, a triangular shape is disclosed.

However, since the conventional hand-held file has a circular, square, or elliptical cross-sectional shape, the range of use is, for example, the inner surface of a through hole for a circular cross-sectional file, and the flat surface for a square cross-sectional file. It was limited. In addition, when polishing a curved surface such as a concave arc, it has not been possible to accurately perform polishing and polishing in accordance with the curved surface of the polishing surface. In other words, in the case of a knife such as a sickle or nata whose flank face is formed of a concave curved surface, it can be accurately polished to maintain the curved surface shape during mountain work. There wasn't.
Japanese Utility Model Publication No. 52-150888 Japanese Utility Model Publication No. 52-59058 Japanese Utility Model Publication No. 52-126287

  Therefore, in the present invention, it is easy to carry in spite of having a sufficiently long polishing portion, and a file that can be polished accurately even with a curved blade as well as a flat surface. The issue is to provide.

(Invention of Claim 1)
The present invention relates to a file formed by adhering an abrasive to the surface of a file main body, the front and back surfaces of a planar file main body whose thickness gradually changes, and both side surfaces connecting the front and back surfaces, and the thickness. And a projecting curved surface whose arc diameter gradually changes with the change of.

  When the file of the present invention is used, the flat portion can be polished by using the front and back surfaces where the thickness of the flat portion of the blade gradually changes, and the curved blade portions and the like connect the front and back surfaces. A concave curved surface or the like can be polished by using a projecting curved surface that is gradually changed with a change in thickness on both side surfaces.

  In addition, in the file of the present invention, the polishing portion on the front and back surfaces and the both side surface portions connecting the front and back surfaces are formed on the same peripheral surface, so the length of the file is short and can be carried even in the case of mountain work. Is not difficult.

(Invention of Claim 2)
This invention relates to the invention described in claim 1 above, and the thickness of the front and back surfaces is gradually reduced from the proximal end portion of the file main body toward the distal end side.

(Invention of Claim 3)
This invention relates to the invention according to claim 1 or 2, wherein a coarse abrasive material on one side of the front and back surfaces of the file main body and a fine abrasive material on the other surface are attached, respectively. Among the projecting curved surfaces, a coarse abrasive material is attached to one surface, and a fine abrasive material is attached to the other surface.

(Invention of Claim 4)
The present invention relates to the invention according to any one of claims 1 to 3, and the abrasive is diamond particles.

(Invention of Claim 5)
The present invention relates to the invention according to any one of claims 1 to 4, wherein the projecting curved surfaces which are both side surfaces connecting the front and back surfaces and gradually change with the change in thickness are arc-shaped. It is.

  The file of the present invention is easy to carry and can be polished accurately even with a blade on a curve as well as a flat surface.

  The best mode for carrying out the file of the present invention will be described in detail below.

  1 is a perspective view of a file 1 according to an embodiment of the present invention, FIG. 2 is a front view of the file 1, FIG. 3 is a side view of the file 1, FIG. 4 is a view seen from the tip of the file 1, and FIG. Is a sectional view of the vicinity of the cutting blade 93 of the sickle 9, FIG. 6 is a sectional view of the vicinity of the cutting blade 93 of the sickle 9, and a sectional view showing a state where the curved surface of the file main body 3 is in contact with the cutting blade 93 of the sickle. FIG. 6 is a front view showing a state in which the curved surface 32 of the file 1 is in contact with the concave arc surface 92 of the sickle 9.

(Basic configuration of file 1)
As shown in FIGS. 1 to 4, the file 1 of this embodiment is formed by fixing a handle 2 having a flange 20 on the base end side of the file main body 3, The front and back surfaces 30 and 31 of the flat file main body 3 whose thickness gradually decreases from the proximal end portion toward the distal end portion side, and both side surfaces connecting the front and back surfaces 30 and 31 to each other, and gradually as the thickness changes. And projecting curved surfaces 32 and 33 whose arc diameters change.

  In addition, diamond particles as an abrasive material are attached to the front and back surfaces 30 and 31 and the projecting curved surfaces 32 and 33 of the file main body 3 so that a cemented carbide chip or the like can be polished.

(About the size of file 1)
As shown in FIGS. 1 to 3, the file 1 includes a handle 2 and a file body 3 that is integrated in a manner of being inserted into the handle 2.

  Here, the handle 2 is set to have a length of 115 mm, a width of 29 mm, a thickness of 24 mm, and an outer dimension of the flange portion of about 39 mm × 34 mm. The file main body 3 has a length of 150 mm, a width of 23 mm, a proximal end thickness of 19 mm, The tip thickness is set to about 4 mm. That is, the total length of the file 1 is as short as 265 mm, and it is easy to grip the maximum diameter of the handle 2 and is not difficult to carry even in the case of mountain work, and is very convenient to use.

  The size of the file 1 is not limited to the above and can be set as appropriate.

(About the configuration of the file body 3 and the functions accompanying it)
The top surface 3 shown in FIG. 2 has a flat width 34 as a central portion with a constant width, and a protruding curved surface width 35 projecting on both sides of the file main body 3 has a constant width. As shown in FIGS. 1, 3, and 4, a curved surface having a large arc diameter is formed at the proximal end portion of the file main body 3, and a curved surface having a small arc diameter is formed at the distal end portion. That is, the file main body 1 gradually changes from a curved surface having a large arc diameter to a curved surface having a small arc diameter from the base end portion toward the distal end portion as shown in FIGS.

  In the file body 3, coarse diamond particles are attached to one of the front and back surfaces 30, 31 and fine diamond particles are attached to the other. The particles are each attached to the fine diamond particles.

  Accordingly, the polishing portions of the front and back surfaces 30 and 31 and the polishing portions of the curved surfaces 32 and 33 on both side surfaces connecting the front and back surfaces 30 and 31 are formed on the same peripheral surface. The entire length of the file main body 3 is used for all of the lengths of the polishing portions of the front and back surfaces 30, 31 and the polishing portions of the curved surfaces 32, 33. That is, it can be said that this file 1 has a sufficient length for polishing the blade.

  In the file main body 2, the front and back surfaces 30, 31 are tapered at the same taper angle in a side view shown in FIG.

(About the actual polishing work in this file 1)
The sickle used for farm work or mountain work usually has a flank of the cutting edge formed of a concave arc surface. A situation in which the blade surface of the sickle 9 is polished using the file of this embodiment will be described with reference to FIG.

  The cross section of the sickle 9 forms a sharp cutting edge 93 by joining a blade material 91 to one side of the blade plate 90 by forging or the like and forming a bladed portion of the blade plate 90 with a concave arc surface 92. .

  When the cutting blade 93 of the sickle 9 is polished, as shown in FIG. 6, the curved surface 32 of the file main body 3 is pressed against the cutting blade 93 and moved from the front to the back (or vice versa). Here, since the curved surface 32 is a convex arc, the cutting edge 93 extending in the concave arc shape of the sickle 9 can be smoothly formed.

In addition, when the file main body 3 is displaced in the longitudinal direction thereof, the arc diameter of the convex curved surface changes, so that it is possible to cope with cutting blades having various concave arc diameters.
(Summary of excellent functions of this file 1)
The file 1 has an excellent function as described below.
(1) The entire length of the file 1 is as short as 265 mm, and it is easy to grip the maximum diameter of the handle 2 and is not difficult to carry even in the case of mountain work, and is very convenient to use.
(2) Since the polishing portions of the front and back surfaces 30 and 31 and the polishing portions of the curved surfaces 32 and 33 on both sides connecting the front and back surfaces 30 and 31 are formed on the same peripheral surface, the file is as described above. Although the entire length of 1 is short, the entire length of the file main body 3 is used for the lengths of the polishing portions of the front and back surfaces 30 and 31 and the polishing portions of the curved surfaces 32 and 33. That is, the file 1 has a sufficient length for polishing the blade.
(3) When the file main body 3 is displaced in the longitudinal direction, the arc diameter of the convex curved surface changes, so that it can cope with various concave arc diameter cutting blades, so that polishing is performed at the most appropriate position. do it.
(4) Of the front and back surfaces of the file main body 3, a coarse abrasive material on one side and a fine abrasive material on the other surface are attached, and further, particles on one side of the two protruding curved surfaces. The coarse abrasive material and the finely-grained abrasive material are attached to the other surface, so after rough finishing on the surface with the coarse-grained abrasive material, the final finish is performed on the surface with the fine-grained abrasive material. If you do, you can quickly make a beautiful finish.

(About other configurations)
Instead of the file 1 of the first embodiment, as shown in FIG. 7, a configuration can be adopted in which the width of the file main body 3 is gradually narrowed from the middle or the like in plan view.

  In the file 1 of Example 1 described above, the abrasive material is diamond particles, but other materials may be used as long as they are hard such as a cemented carbide tip.

The perspective view of the file of the Example of this invention. The top view of the said file. The side view of the file. The figure seen from the front-end | tip of the said file. Sectional drawing near the cutting blade of a sickle. Sectional drawing which shows the state which the curved surface of the file main body contacted the cutting blade of the sickle. The perspective view of the file of other Examples.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 File 2 Grip 20 Gripper 3 File body 30 Front surface 31 Back surface 32 Curved surface 33 Curved surface 34 Width 35 Width

Claims (5)

In a file made by adhering abrasive to the surface of the file body, the front and back surfaces of the planar file body where the thickness gradually changes, and both side surfaces connecting the front and back surfaces with the change in the thickness A file having a projecting curved surface whose arc diameter gradually changes. The file according to claim 1, wherein the thickness of the front and back surfaces is gradually reduced from the proximal end portion of the file main body toward the distal end side. Of the front and back surfaces of the file body, a coarse abrasive material is attached to one surface, and a fine abrasive material is attached to the other surface. Further, of the two protruding curved surfaces, a coarse abrasive material is provided on one surface. The file according to claim 1 or 2, wherein a fine abrasive material is adhered to the other surface. The file according to any one of claims 1 to 3, wherein the abrasive is diamond particles. The file according to any one of claims 1 to 4, wherein the projecting curved surfaces which are both side surfaces connecting the front and back surfaces and gradually change as the thickness changes are arcuate.

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