JPH0435287B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention is directed to, for example, connecting both ends of a string chisel using an appropriate method to make it endless, and winding it between a main shaft and a driven wheel to run the string chisel. This method relates to sanding the surfaces of metals, wood, synthetic resins, etc. by utilizing their flexibility, regardless of whether they are flat or curved.

《Prior Art》 Conventional files, whether manually or electrically operated, simply reciprocate or rotate a rod-shaped or plate-shaped object, so they rely on the dexterity of the worker to handle curved surfaces. I was in trouble. Therefore, unmanned operation is extremely difficult and we have no choice but to rely on human power.

《Problems to be solved by the invention》 Recently, a wide variety of surface finishing techniques have been developed for flat surfaces, from super finishing to sand finishing, but these techniques can only be applied to curved surfaces and mixed surfaces of flat and curved surfaces. I can't find anything effective, including deburring.

This feeling is particularly strong in the file finishing class, as the surfaces to be finished are of a wide variety of sizes.
Therefore, there are problems such as labor saving, automation, and unmanned technology in this field lagging far behind.

<<Means for Solving the Problems>> The present invention was made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a flexible file.

Therefore, the present invention is constructed as follows.

A string made of elastic material with a plurality of V-shaped grooves arranged in a star-shaped arrangement formed in the axial direction of the surface is used as a core, and a ring made of elastic material with a round cross-sectional shape, whose inner diameter is externally fitted to the string, is inserted into the inner surface of the through hole. The hollow material has a V-shaped groove formed therein that fits snugly into the surface shape of the elastic material cord, and a round chisel forming a cutting edge on the outer peripheral surface of the hollow material is successively combined and communicated.

《Operation》 Supports both ends of the string file and performs cutting by reciprocating motion similar to normal filing work, and also supports both ends with a bow-shaped support and gives elasticity to this support to accommodate curved surfaces. In addition, it is possible to connect both ends using an appropriate method to create an endless chain, and by running it in a winding manner, it can run in contact with a mixture of curved surfaces and flat curved surfaces due to its flexibility. By interposing the wheel, it can be used in a variety of ways, such as for filing two-dimensional curved surfaces.

<<Example>> A specific example of the strap according to the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 is a perspective view of the cord. In the cross section of the elastic cord 1, a plurality of V-shaped grooves 2 are formed in a star-shaped arrangement in the axial direction of the surface. A round chisel 3 and an elastic ring 4 are shown in communication with an elastic cord 1.

A graze 5 is formed on the outer circumferential surface of the chisel 3, and the surface shape of the elastic material string 1 is formed on the inner surface of the through hole 6 of the chisel 3 so that the cutting edges of the chisel 5 are aligned in the axial direction. A matching V-shaped groove 6 is associated with the drill bit 5 and allows communication of the drill bit 3 in each position during assembly.

Further, the grain 5 of the round chisel 3 is the same as that of a well-known round chisel conventionally used for ironwork and other works. Figure 4 shows the case of bending the string file, and the minimum bending radius R is the dimension H shown in Figure 2, that is, the distance between the round file 3 and the ring 4 made of elastic material, and the width H of the round file 3. ′ is determined by the selection of .

《Effects of the Invention》 According to the present invention, it is not only possible to simply use the string as a filer, but also to run it around the string endlessly, so that it is possible to freely perform sanding and chamfering work on both flat and curved surfaces. Compared to conventional sanding work, it is several times more efficient, and by bonding abrasive grains to the outer circumferential surface as a cutting edge instead of a filer, polishing work is also possible, and it can also be automated as a pre-process tool such as a well-known profile sander. is possible.

[Brief explanation of drawings]

The drawings show an embodiment of the strapping according to the present invention, and FIG. 1 is a perspective view, FIG. 2 is a side sectional view, FIG. 3 is a cross-sectional view, and FIG. 4 is a view of the strap when it is bent. This shows the state of the minimum bending radius. 1...String made of elastic material, 3...Round, 4...Ring made of elastic material.

Claims (1)

[Claims] 1 A through-hole is formed between rings made of an elastic material with a round cross-sectional shape and whose inner diameter is externally fitted to a string made of an elastic material with a plurality of V-shaped grooves in a star-shaped arrangement formed in the axial direction of the surface as a core. A string chisel, characterized in that a V-shaped groove is formed on the inner surface to match the surface shape of the elastic material string, and round chisels forming a cutting edge on the outer circumferential surface of a hollow material are successively combined and communicated.