Interchangeable tap shaping tool compatible with multiple curvature levels

Abstract

To provide a tap shaping tool that allows for easy replacement of the polishing surface and can handle a wide range of curvature radii (R) with a single unit. [Solution] The tap shaping tool has a shaping body 1 that is divided into an upper and lower layer by a slit-shaped through hole 3 extending in the direction of the long side. Multiple elliptical grooves 2 with gradually different radii of curvature are formed in a row on the upper surface of the lower layer. Multiple openings corresponding to the upper position of each groove 2 are provided in the upper layer. A strip of abrasive paper inserted through the through hole 3 curves along each groove 2 on the upper surface of the lower layer, forming the polishing surface of the grooves 2. An indicator 4 showing the corresponding radius of curvature is provided near each groove 2. A back surface polishing section 8 is provided on the lower surface of the lower layer and can be used for the final shaping of the tap. Furthermore, by using a thin plate-shaped checker 5 having multiple measuring arcs 6 and holding holes 7 in combination, the shaping state of the tap can be precisely confirmed.

Description

Technical Field

[0004] ,

[0001] The present invention relates to a tap shaper for shaving the surface of a "tap", which is a tip part of a billiards cue, and adjusting it to an appropriate roundness (R).

Background Art

[0002] Many conventional tap shapers have a fixed metal file surface, and when the file wears out, it is necessary to replace the entire tool. In addition, the curvature (R) that can be shaped is limited to one type or a small number, making it difficult to meet the fine preferences of players.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a structure that can use commercially available paper files and the like at a low cost and always maintain high polishing performance. Another object is to enable one tool to correspond to a large number of radii of curvature and allow players to perform precise shaping according to their preferences.

Means for Solving the Problems

[0004] To solve the above problems, the tap shaping tool of this invention has a slit-shaped through hole extending in the long-side direction in the shaping section body, dividing the shaping section body into an upper layer and a lower layer with the through hole as the boundary. On the upper surface of the lower layer, a plurality of elliptical grooves with gradually different radii of curvature are formed in line in the long-side direction. The upper layer is provided with a plurality of openings corresponding to the positions above these grooves, allowing a tap to be inserted downward from the opening in the upper layer. By inserting a strip of sandpaper through the through hole, the sandpaper curves along the grooves on the upper surface of the lower layer, forming a polishing surface for the grooves. This allows the tap inserted from the opening in the upper layer to be pressed against the grooves covered with sandpaper and shaped to the desired curvature. In addition, the back surface of the shaping section body (the bottom surface of the lower layer) is provided with a polishing surface having a gentle curvature for use in the final shaping of the tap. [Effects of the Invention]

[0005] According to this invention, worn files can be easily replaced, making it economical and ensuring optimal cutting performance at all times. Furthermore, by providing multi-stage grooves, such as in 0.5mm increments from 7.5mm to 12.0mm, fine shape adjustments are possible. In addition, the polishing section on the back allows the finishing process, following the rough shaping by the grooves on the front, to be completed with a single machine. [Brief explanation of the drawing]

[0006] [Figure 1] This is a perspective view showing the entire tap shaping tool of the present invention. [Figure 2] This is a cross-sectional view showing sandpaper attached to the groove. [Figure 3] This is a plan view showing the included thin plate-shaped curvature checker. [Modes for carrying out the invention]

[0007] Figure 1 is a perspective view showing the entire tap shaping tool according to the present invention. The shaping body 1 has a substantially rectangular parallelepiped shape, and a plurality of arc-shaped grooves 2 with progressively different radii of curvature are formed on its upper surface. In this embodiment, the radii of curvature of the grooves 2 range from 7.5 mm to 12.0 mm in 0.5 mm increments, and a total of 10 types of grooves 2 are provided. This allows for precise selection of the radius of curvature according to the player's preference. Near each groove 2, there is a display section 4 engraved with a numerical value indicating the radius of curvature of that groove 2. This allows the user to easily identify the groove 2 corresponding to a desired radius of curvature. Figure 2 is a cross-sectional view showing the shaping section body 1 of Figure 1, cut in the direction of the shorter side perpendicular to the longer side of the shaping section body 1 at the center position of one of the grooves 2. As shown in Figure 2, the shaping section body 1 is divided into an upper and lower section by a slit-shaped through hole 3 that penetrates the interior in the direction of the longer side. The through hole 3 opens on both opposing sides (long sides) of the shaping section body 1. On the upper surface of the lower section, there are multiple elliptical grooves 2 in the direction of the longer side (3) The grooves 2 are formed in a row, and each groove 2 is a recess that serves as the polishing surface for the tap. Multiple openings corresponding to the upper positions of each groove 2 are formed in the upper part, and these openings function as passages for inserting the tap downwards. The user cuts commercially available sandpaper into a strip (for example, about 1.5 cm wide), inserts it through one opening of the through hole 3, and pulls it out from the other opening. As a result, the sandpaper curves in an elliptical shape along the groove 2 on the upper surface of the lower part, forming the polishing surface of the groove 2. In this state, the tap is pressed downwards from the opening of the upper part to polish on the polishing surface of the groove 2. When the sandpaper wears out, the unused surface can be easily fed to the polishing surface of the groove 2 by pulling the sandpaper in the long side direction, and it is also easy to replace the sandpaper with new sandpaper when it is completely worn out. The back surface of the shaping unit body 1 is provided with a back surface polishing section 8 having a gentle curvature. This back surface polishing section 8 is used for final shaping (finish polishing) after polishing by the groove 2 on the upper surface. This allows a series of operations from rough shaping to finish shaping to be completed with a single device. As shown in Figure 3, the tap shaping tool of this invention is equipped with a thin plate-shaped checker 5 for checking the radius of curvature of the tap after shaping. The checker 5 has multiple measuring arcs 6 formed on it, corresponding to the respective radii of curvature of the multiple grooves 2 provided in the shaping body 1. The user can easily and precisely measure the radius of curvature of the tap by placing the checker 5 against the shaped tap and identifying the most suitable measuring arc 6. Furthermore, a retaining hole 7 is provided at the end of the checker 5, and by attaching a keychain or the like to the retaining hole 7, the checker 5 can be carried in a cue case or the like. It should be noted that this invention is not limited to the above-described embodiments, and various modifications are possible without departing from its essence. For example, the numerical range of the radius of curvature of the groove 2 and the groove width can be appropriately changed depending on the application. Also, the material of the shaping part body 1 may be resin, wood, metal, or any other material. [Explanation of symbols]

[0008] 1. Main body of the shaping section 2. Concave groove (elliptical polishing area) 3 Slits (through holes for inserting abrasive paper) 4. Display section (numerical markings indicating the radius of curvature) 5. Checker (tool for checking curvature) 6. Measuring arc 7 Retention hole 8. Polished area on the back

Claims

1. A tip shaping tool for shaping the tip attached to the end of a billiard cue to a predetermined radius of curvature, comprising a shaping body, the shaping body having a slit-shaped through hole extending in the direction of its long side and opening on opposing sides, and being divided into an upper layer and a lower layer by the through hole, the upper surface of the lower layer having a plurality of elliptical grooves with progressively different radii of curvature arranged in the direction of its long side, and the upper layer having a plurality of openings corresponding to the position above each of the grooves, which are openings for inserting the tip downward, thereby allowing a strip of abrasive paper to be inserted through the through hole and curve along each of the grooves on the upper surface of the lower layer to form the polished surface of the grooves.

2. The tap shaping tool according to claim 1, further comprising a polishing surface on the lower surface of the lower layer for use in the final shaping of the tap.

3. A tap shaping set comprising a tap shaping tool according to claim 1 or 2 and a thin plate-shaped checker used together with the tap shaping tool, wherein the checker has a plurality of measuring arcs corresponding to the radius of curvature of the plurality of grooves and a holding hole.

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