JP7178095B2 - Polishing equipment for skate blades - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sharpening tool for sharpening blades of skates.

Ice skating shoes have a curvature called a lock radius of about R20 to R25m, for example, about R20 to R25m, like the bottom of a ship when viewed from the side, in order to allow them to smoothly bend and glide at the corners of a skating rink. It is This locking radius plays an important role when transferring power from the blade to the ice and when turning corners, but the edge of the blade surface wears due to friction with ice, so the blade surface should be cleaned regularly. must be polished to

However, when an operator grinds the blade surface, the number of times the grindstone is manually reciprocated, the degree of force applied, the grinding direction, etc. differ from operator to operator, and it is difficult to grind so as to maintain the lock radius. If the blade surface is ground using the wrong method, it will be in a state of double lock with several types of curvature. Therefore, the technique disclosed in Japanese Unexamined Patent Application Publication No. 2002-200001 is known as a conventional technique for suppressing variations in polishing accuracy due to individual differences.

The blade polishing apparatus for ice skates disclosed in Patent Document 1 is provided with a stand, a blade clamping means, a predetermined lock-shaped template, blade surface height alignment means, and a whetstone that moves while following the template. and polishing means. The operator sets the blade of the skate on the blade clamping means of the stand, aligns the height of the blade surface with the upper end surface of the template by the blade surface height aligning means, and moves the polishing means several times so as to follow the template. By moving it, the blade is ground into a lock shape.

However, the blade polishing apparatus for ice skating shoes of Patent Document 1 has a large number of parts, is complicated, and is large. It takes time and effort. Therefore, Japanese Patent Laid-Open No. 2002-300000 discloses a technique that can reduce the size of the polishing apparatus and reduce the time and effort required for the polishing work.

The edge sharpener disclosed in Patent Document 2 includes a cylindrical whetstone, a pair of holders holding the whetstone with a predetermined gap therebetween, and a fixture for holding the holder. With the blade of the skate shoe facing upward, the grindstone is brought into contact with the blade surface of the blade by sandwiching the blade between the holders. In this state, the grindstone is moved while being adjusted so that a blade surface with a predetermined lock radius is formed, and the blade surface is polished.

However, in the edge sharpener of Patent Document 2, since the whetstone extends linearly in the longitudinal direction of the blade, unless a skilled worker sharpens the blade surface to a predetermined lock radius. is difficult. In general, when polishing a blade surface with a predetermined lock radius with a straight grindstone, the blade surface is heated by frictional heat because the grindstone and the blade surface are reciprocated many times in a state of point contact. In order to prevent this from happening, oil and water are sometimes applied to the blade surface, which takes time and effort to polish.

Japanese Unexamined Patent Application Publication No. 2011-45971 JP-A-63-7272

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a small and simple skate blade sharpening tool that can easily sharpen a blade surface with a predetermined lock radius without variations in accuracy depending on the operator. and

[1] A skate blade sharpening tool for sharpening a blade surface formed with a predetermined lock radius that bulges outward in a side view of a skate blade,
a base metal provided with a recess having a curvature equal to the curvature of the locking radius of the blade surface;
and a polishing abrasive grain portion provided in the concave portion for polishing the blade surface.

According to such a configuration, since the base metal has the abrasive grain portion in the concave portion having a curvature equal to the lock radius curvature of the blade surface, the abrasive grain portion having a curvature equal to the lock radius curvature of the blade surface can be applied to the edge of the blade. The surface will be polished. Therefore, the operator can sharpen the blade surface to a predetermined lock radius simply by moving the base metal along the blade surface without being aware of the curvature of the predetermined lock radius. Furthermore, since the curvature of the abrasive grain portion and the curvature of the blade surface are the same, the abrasive grain portion makes contact with the entire blade surface along the blade surface instead of point contact, so the amount of polishing per movement is increased. be able to. Therefore, the polishing can be completed before the frictional heat becomes high, and the oil and water for cooling are unnecessary, so that the polishing can be easily performed without requiring much time and effort. Further, since a frame or the like for installing the skate blade is not required and the number of parts is small, the structure can be made small and simple.

[2] Preferably, the abrasive grain portion is an adhesive seal-type polishing sheet that can be attached to and detached from the recess.

With such a configuration, when the abrasive grain portion is worn out, the adhesive seal-type polishing sheet, which is the abrasive grain portion, can be easily attached and detached for replacement. For example, by changing to a polishing sheet with a higher grain size, polishing can be finished, and polishing can be performed according to the situation.

[3] Preferably, the base metal is plate-shaped, and provided with two side portions that are continuous with both edges of the arc shape of the recess,
Two holders formed larger than the base metal and abutting on the side portions to hold the base metal therebetween, and guide portions provided in the two holders for guiding the blade are provided.

According to such a configuration, since the plate-like base metal is sandwiched between the two holders, it can be easily held by the holders. Since the two holders are provided with guide portions, the base metal can be easily moved along the longitudinal direction of the blade.

[4] Preferably, the two holders and the base metal are fastened with a fastening member.

According to such a configuration, the base metal can be easily removed from the holder by releasing the fastening by the fastening member. Therefore, the base metal can be easily replaced with a base metal provided with a concave portion that matches the cutting surface of a blade with a different locking radius. Furthermore, by easily removing the base metal from the holder, the abrasive grain portion of the base metal can be easily replaced.

[5] Preferably, the guide portion is composed of a plurality of resin bushings that are spaced apart from each other along the guide direction of the blade on the opposing surfaces of the two holders.

According to such a configuration, since the guide portion is a plurality of bushings made of resin, the blade can be guided more smoothly.

[6] Preferably, each of the bushings is provided on the facing surfaces of the holder so as to be height-adjustable.

With such a configuration, by making the bushing detachable, it is possible to handle blades having different thicknesses for figure skating, speed skating, hockey, and the like. Furthermore, since blades for short track speed skating and the like are bent in plan view (in the direction in which the blade advances), it is preferable if the blade can be guided along the bend in plan view because it facilitates polishing. In this respect, according to the present invention, by adjusting the height of the bushing, the blade can be guided along the bending of the blade in a plan view, and sharpening can be easily performed.

[7] Preferably, the guide section includes an elastic member disposed between the bushing and the holder to urge the bushing toward the blade.

According to such a configuration, the bushing is urged toward the blade by the elastic member. Therefore, the blade can be sandwiched and guided in accordance with the thickness of the blade, and the polishing surface of the abrasive grain portion and the blade can always be maintained perpendicular to each other during polishing.

[8] Preferably, the bushing and the elastic member are detachably attached to the holder.

According to such a configuration, by making the bushing and the elastic member detachable, parts can be easily replaced when the bushing wears.

[9] Preferably, the holder is provided with an anti-slip portion that is gripped by the operator's hand and prevents the operator's hand from slipping.

According to such a configuration, the anti-slip portion allows the polishing operator to easily grip the holder.

[10] Preferably, a plurality of recesses are provided in the base metal,
The polishing abrasive grain portion is provided in each of the plurality of concave portions.

According to such a configuration, for example, roughing and finishing can be performed with one sharpening tool for skate blades by arranging abrasive grain portions with different grain sizes on one base metal.

It is possible to provide a sharpening tool for skate blades which is small in size and simple in structure and which can easily sharpen to a blade surface with a predetermined lock radius without variations in accuracy depending on the operator.

1 is a perspective view of a sharpening tool for skate blades according to the present invention; FIG. Fig. 2 is an exploded perspective view of the sharpening tool for skate blades of Fig. 1; FIG. 2 is a cross-sectional view of the essential parts of the skate blade sharpening tool of FIG. 1 ; FIG. 2 is an explanatory view showing how the sharpening tool for skate blades of FIG. 1 is used. 1 is a perspective view of a base metal and a skate blade according to the present invention; FIG. FIG. 4 is an explanatory diagram of exchanging the polishing sheet of the base metal; FIG. 2 is an enlarged view of a main part of the polishing sheet; FIG. 4 is an enlarged view of a principal portion of a polishing sheet in another embodiment; FIG. 9(a) is a view of the operation of the skate blade sharpening tool of the comparative example. FIG. 9(b) is a working diagram of the sharpening tool for skate blades of the embodiment. FIG. 10(a) is a graph showing the profile of the blade surface as a reference. FIG. 10(b) is a graph showing the blade surface profile of the comparative example. FIG. 10(c) is a graph showing the blade surface profile of a further comparative example. FIG. 10(d) is a graph showing the blade surface profile of the example. FIG. 3 is an illustration of a first alternative sharpening tool for skate blades; FIG. 4 is an explanatory view of a second alternative sharpening tool for skate blades; FIG. 11 is an explanatory view of a third alternative sharpening tool for skate blades; FIG. 11 is an explanatory diagram of a skate blade sharpening tool according to a fourth alternative embodiment; FIG. 11 is an explanatory view of a skate blade sharpening tool according to a fifth alternative embodiment;

An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings conceptually (schematically) show the sharpening tool for skate blades.

As shown in FIGS. 1 to 3, the skate blade sharpening tool 10 includes a base metal 20, a polishing abrasive grain portion 30 provided on the base metal 20, and two holders 40 holding the base metal 20 therebetween. , 50 , guide portions 60 provided on these two holders 40 , 50 , and a fastening member 70 for fastening the two holders 40 , 50 and the base metal 10 .

A skate 80 (see FIG. 4) is for speed skating, and a blade 81 of the skate 80 is formed with a blade surface 82 formed with a predetermined lock radius R that bulges outward when viewed from the side. The blade 81 has a curvature of R24m, for example, like the bottom of a ship when viewed from the side.

The base metal 20 is provided with a concave portion 21 having a curvature equal to the curvature of the lock radius R of the blade 81 . A polishing grain portion 30 for polishing the blade surface 82 is provided along the concave portion 21 . Therefore, the curvature of the surface of the abrasive grain portion 30 is equal to the curvature of the lock radius R of the blade 81 . Further, when the blade 81 is used for speed skating or ice hockey, the blade surface 82 is planar (edges are at right angles) in cross section, and the abrasive grain portion 30 is also planar.

The base metal 20 is a plate-shaped stainless steel elongated in one direction. The base metal 20 is provided with side portions 22 that are continuous with both edges of the arc shape in which the recesses 21 are formed. A plurality of through holes 23 are formed in these side portions 22 , and fastening members 70 are inserted through these through holes 23 .

In the embodiment, the base metal 20 is made of stainless steel, but is not limited to this, and may be made of a rust-resistant material or plated material, such as titanium alloy, nickel alloy, synthetic resin, or plated material. It may be iron or the like. Further, in the embodiment, the recess 21 is formed from the front end to the rear end in the longitudinal direction of the base metal 20, but is not limited to this, and may be formed in a part of the base metal 20 in the longitudinal direction.

The two holders 40 and 50 are formed larger than the base metal 20. - 特許庁Grooves 41 and 51 into which the base metal 20 is fitted are formed inside the holders 40 and 50, respectively. Further, chamfers 42, 52 are formed on the inner peripheral portions of the holders 40, 50, respectively, and chamfers 43, 53 are formed on the outer peripheral portions, respectively. The chamfers 42 , 52 on the inner periphery allow the blade 81 to be easily guided to the guide portion 60 when the blade 81 is fitted into the guide portion 60 . The holders 40 and 50 are preferably made of a rust-resistant material, such as aluminum, but are not limited to this, and may be made of other common metals such as iron, resin, wood, or the like.

Counterbore holes 44 are formed in the holder 40 coaxially with the through hole 23 of the base metal 20 , and the fastening member 70 is inserted through these counterbore holes 44 . A threaded hole 54 is formed in the holder 50 coaxially with the through hole 23 of the base metal 20 , and a fastening member 70 is fastened to the threaded hole 54 . The groove portions 41 and 51 of the holders 40 and 50 are in contact with the side portions 22 of the base metal 20 , and the base metal 20 is sandwiched between the holders 40 and 50 . Note that the fastening member 70 may be any member such as a bolt, a hexagonal bolt, or a screw as long as it can be fastened.

The guide portion 60 is composed of a plurality of resin bushings 61 and an elastic member 62 disposed between the bushings 61 and the holders 40 and 50 to urge some or all of the bushings 61 toward the blade 81 side. ing. The holders 40 and 50 are formed with a plurality of bushing counterbore holes 45 and 55 for accommodating only the bushing 61 or for accommodating the bushing 61 and the elastic member 62, respectively. Moreover, each of the bushings 61 of the guide portion 60 is provided so as to be adjustable in height by replacing with bushings 61 having different heights (protrusion amounts).

The bushings 61 are spaced apart from each other along the guide direction (longitudinal direction) of the blade 81 on the opposing surfaces of the two holders 40 and 50 . The bushings 61 are respectively fastened to the holders 40 and 50 by fastening members 71 . Although the fastening member 71 is a screw in the embodiment, the fastening member 71 is not limited to this, and may be a bolt, a pin, or the like.

Also, the thickness of the blade 81 of the speed skate is about 1.0 mm, and although the thickness varies slightly depending on the blade 81 , the bushing 61 is urged toward the blade 81 by the elastic member 62 . Therefore, the blade 81 can be sandwiched and guided according to the thickness of the blade 81, and the polishing surface of the polishing grain portion 30 and the blade surface 82 of the blade 81 can always be maintained perpendicular to each other during polishing.

Also, by changing the size and material of the O-ring, which is the elastic member 62, the cushioning effect of adjusting the thickness can be adjusted. In the embodiment, the elastic member 62 is made of a rubber O-ring, but is not limited to this, and may be made of synthetic resin, a compression spring, or the like as long as the bushing 61 can be biased toward the blade 81 side. good.

Further, since the blade 81 for speed skating such as short track has a bend in the direction of travel of the blade (there is a bend in a plan view), it is necessary to guide and grind along the bend. In this regard, in the present invention, the height of the bushings 61 can be adjusted by changing to bushings 61 with different heights (protrusion amounts). can be a guide portion 60. Therefore, polishing along the bending of the blade 81 can be easily performed.

The bushing 61 is made of Teflon (registered trademark, hereinafter omitted), and a chamfer 63 is formed at the end on the blade side. This chamfer 63 allows the blade 81 to be easily guided to the end face 64 of the bushing 61 . The end surface 64 is annular, and the bushing 61 is made of Teflon, which has excellent slipperiness and durability, so that the bushing 61 can be easily slid. A counterbore 65 is formed in the bushing 61 , and the fastening member 71 is inserted through the counterbore 65 . The head of the fastening member 71 is housed inside the end surface 64 . Although the bushing 61 is made of Teflon, it is not limited to this, and other resin such as POM (polyacetal) may be used as long as the material has good slipperiness and durability.

Next, how the skate blade sharpening tool 10 is used when sharpening the blade 81 will be described.
As shown in FIGS. 3 and 4, during the polishing operation, the operator directs the blade 81 of the skate 80 upward, moves the skate blade polishing tool 10, and places the polishing grain portion 30 on the blade surface 82 of the blade 81. abut on. At this time, since the chamfers 42 and 52 of the holders 40 and 50 and the chamfer 63 of the bushing 61 are guided in two stages, the blade surface 82 of the blade 81 can be easily guided to the abrasive grain portion 30 . Also, the width of the abrasive grain portion 30 is set larger than the width of the blade surface 82 .

Next, the abrasive grain portion 30 will be described.
As shown in FIG. 5, the recessed portion 21 of the base metal 20 is provided with a polishing grain portion 30 . The abrasive grain portion 30 has an arcuate shape when viewed from the side, and the curvature of the abrasive grain portion 30 is equal to the curvature of the lock radius R serving as the reference of the blade 81 . Therefore, when the abrasive grain portion 30 is brought into contact with the blade surface 82 of the blade 81 , the abrasive grain portion 30 matches the blade surface 82 .

As shown in FIG. 6 , the abrasive grain portion 30 is an adhesive seal-type polishing sheet that can be attached to and detached from the concave portion 21 . When the abrasive grain portion 30 is worn out, the abrasive grain portion (hereinafter referred to as abrasive sheet) 30, which is an adhesive seal-type abrasive sheet, can be easily detached and replaced. For example, by replacing the polishing sheet 30 with a polishing sheet 30 having a higher grain size, polishing can be finished, and polishing can be performed according to the situation.

As shown in FIG. 7, the polishing sheet 30 consists of an adhesive sheet 31 and a diamond layer 32 laminated on the adhesive sheet 31 . The diamond layer 32 is, for example, a sheet surface on which diamond abrasive grains are adhered with a water- and oil-resistant adhesive.

Next, another embodiment of the polishing sheet 30 will be described.
As shown in FIG. 8, another polishing sheet 30 comprises an adhesive sheet 31, a copper plate 33 laminated on the adhesive sheet 31, and a diamond layer 32 laminated on the copper plate 33. As shown in FIG. The diamond layer 32 is electrodeposited with diamond particles. Such a polishing sheet 30 is called diamond paper and comes in various types. Diamond paper formed on a metal sheet has excellent durability. In addition, diamond grain sizes of #200 to #3000 are mainly used. For example, metal-based diamond papers such as #400 and #800 manufactured by Fujiwara Sangyo Co., Ltd., and #1200 and #1800 manufactured by Nakanishi Co., Ltd. are used. By treating the back surface of the polishing sheet 30 with an adhesive sheet, it becomes easy to adhere to and peel off from the base metal 20 .

Further, the higher the hardness of the abrasive grain size, the better, and the greater the difference in hardness from the blade 81, the higher the polishing efficiency. Vickers hardness is 7140 to 15300 for diamond, 2300 for ruby, 2350 for grindstone (silicon carbide), and 722 for general blade 81 made of high-speed steel (high-speed steel). Since the difference between diamond and ruby (corundum) and silicon carbide, which are the next highest, is extremely large, it can be seen that the polishing efficiency of diamond is extremely high.

Next, the operation of the sharpening tool 10 for skate blades will be described.
FIG. 9(a) shows a skate blade polishing tool 100 of a comparative example, in which the polishing abrasive grain portion 101 is formed in a planar shape. During the polishing operation, the abrasive grain portion 101 is in point contact with the blade surface 82 of the blade 81 slightly worn from the curvature of the predetermined lock radius R. Therefore, the sharpening operator sharpens the blade surface 82 while adjusting the movement of the skate blade sharpening tool 100 so as to obtain the predetermined lock radius R, which takes time. When the skate blade sharpening tool 100 of the comparative example is used, the sharpening operation usually takes 1 to 2 hours. Moreover, it is difficult for a child to ask a skilled grinder to polish the blade surface 82 with the predetermined lock radius R unless it is a skilled grinder.

FIG. 9(b) shows the skate blade sharpening tool 10 of the embodiment, in which the abrasive grain portion 30 is formed with a curvature of a predetermined lock radius R. FIG. During the polishing operation, the polishing abrasive grain portion 30 comes into almost full contact with the edge surface 82 of the blade 81 which is slightly worn from the curvature of the predetermined lock radius R. Therefore, the sharpening operator can sharpen the blade surface 82 of the blade 81 to a curvature of the predetermined lock radius R simply by reciprocating the skate blade sharpening tool 10 several times without being particularly conscious of it. In the present invention, the polishing time is several seconds to several tens of seconds, and even an unskilled polishing operator such as a child can easily polish the blade face 82 and the desired edge.

Next, the profile of the blade surface 82 of the blade 81 before and after polishing will be described.
FIG. 10(a) is a reference profile of the blade surface 82 with a predetermined lock radius. The horizontal axis is the longitudinal position [mm] of the blade surface 82, and the vertical axis is the height [mm]. Measurement is performed with a predetermined dial gauge.

FIG. 10(b) shows the profile of the blade surface 82 after the grinding operation of the comparative example, which is in a so-called double-locked state having a plurality of curvatures with two curved portions. This may be formed when sharpening by an unskilled sharpener using a comparative skate blade sharpening tool 100 as shown in FIG. 9(a).

FIG. 10(c) shows the profile of the cutting edge 82 after the grinding operation of a further comparative example, which has a curvature much greater than the predetermined lock radius R or is nearly flat. This may also be formed when an unskilled sharpening operator sharpens using a comparative skate blade sharpening tool 100 as shown in FIG. 9(a).

FIG. 10(d) shows the profile of the cutting edge 82 after the grinding work in the example, and the curvature is the same as the curvature of the predetermined lock radius R as a reference. The profile was formed by an unskilled sharpener using the skate blade sharpener 10 of the example, and it can be seen that the sharpening accuracy is high.

Next, another aspect of the sharpening tool 10 for skate blades will be described.
As shown in FIG. 11, in the skate blade sharpening tool 10 of the first alternative, the holder 40 is provided with an uneven non-slip portion 46 that is gripped by the operator's hand and prevents the hand from slipping. The non-slip portion 46 allows the polishing operator to easily grip the holder 40 for work.

As shown in FIG. 12, in the skate blade sharpening tool 10 of the second alternative embodiment, the holder 40 and the base metal 20 have a triangular shape, and the base metal 20 is provided with a plurality of recesses 21. The abrasive grain portion 30 is provided in each of the plurality of recessed portions 21 . For example, by arranging abrasive grain portions 30 having different grain sizes on one base metal 20, rough processing, finishing processing, etc. can be performed with one skate blade polishing tool 10. FIG. Further, the lock radius R of the blade 81 differs depending on the sport of speed skating, figure skating, and ice hockey, and also slightly differs depending on the individual. At this time, the curvature radii R1, R2, and R3 of the plurality of concave portions 21 and the abrasive grain portions 30 are set to the curvature radii according to the competition or individual, respectively, so that one skate blade sharpening tool 10 can be used. can.

In the embodiment, the triangular shape is used, but the shape is not limited to this, and may be square, hexagonal, or the like. The shape does not matter as long as is provided.

As shown in FIG. 13, in the skate blade sharpening tool 10 of the third alternative embodiment, the holders 40 and 50 and the base metal 20 are hexagonal, and a hexagonal hole serving as an anti-slip portion 46 is formed in the center. formed. With this hole-shaped anti-slip portion 46, any side can be easily gripped, and workability can be improved.

As shown in FIG. 14, the fourth alternative skate blade sharpening tool 10 has flat inner surfaces of the holders 40 and 50 . The base metal 20 is fixed to the holders 40 and 50 by fastening members 70 . By making the inner surfaces of the holders 40 and 50 flat, processing is facilitated, and the manufacturing cost of the sharpening tool 10 for skate blades can be reduced. When the blade 81 is used for figure skating, the blade surface 82 has an inwardly recessed groove shape (with sharp edges) in a cross-sectional view, and the abrasive grain portion 30 has an outwardly bulging arc shape. be.

As shown in FIG. 15, in the skate blade sharpening tool 10 of the fifth alternative, the heights of the plurality of bushings 61 in plan view are different so that they form circular arcs (inside the holders 40, 50). The amount of protrusion from the surface of the surface is different). Even in speed skating, the short track has a small radius of curve, so the blade 81 for short track is bent in a plan view. By changing the height of the bushing 61 according to the bending of the short track blade 81, even the short track blade 81 can be easily guided.

In the present invention, the bushing 61 is detachably attached to the holders 40 and 50 by a fastening member 71 (see FIGS. 2 and 3). By making the bushing 61 detachable, blades 81 with different thicknesses for figure skating, speed skating, hockey, etc., and also blades 81 with different bending radii can be handled.

Next, the operation and effect of the sharpening tool 10 for skate blades described above will be described.
As described above, the base metal 20 includes the abrasive grain portion 30 in the concave portion 21 having a curvature equal to the curvature of the lock radius R of the blade surface 82 . The granules 30 grind the blade surface 82 of the blade 81 . Therefore, the operator simply moves the skate blade sharpening tool 10 (base metal 20) along the blade surface 82 without being conscious of the curvature of the predetermined lock radius R. can be ground to a lock radius R of Furthermore, since the curvature of the abrasive grain portion 30 and the curvature of the blade surface 30 are the same, the abrasive grain portion 30 does not make point contact with the blade surface 30 but makes contact with the blade surface 30 entirely along the blade surface 30. Abrasive amount can be increased. Therefore, the polishing can be completed before the frictional heat becomes high, and the oil and water for cooling are unnecessary, so that the polishing can be performed easily without requiring much time and effort. Furthermore, since a frame for installing the skate blade is not required and the number of parts is small, the structure can be small and simple, and can be easily carried.

Furthermore, since the plate-like base metal 20 is sandwiched between the two holders 40 and 50, the holders 40 and 50 make it easier to hold. Since the two holders 40 and 50 have guide portions 60 , the base metal 20 can be easily moved along the longitudinal direction of the blade 81 .

Further, the base metal 20 can be easily removed from the holders 40 and 50 by releasing the fastening by the fastening member 70 . Therefore, it is possible to easily replace the base metal 20 with a recess 21 that matches the blade surface 82 of the blade 81 having a different lock radius R. Furthermore, by easily removing the base metal 20 from the holders 40 and 50, the polishing abrasive grain portion 30 of the base metal 20 can be easily replaced.

Although the blade 81 of the embodiment is for speed skating and has a lock radius R of R24m, it is not limited thereto, and the lock radius R may be from R20m to 25m. Furthermore, for short tracks, the lock radius R of the blade 81 may be R7m to 10m, and the bending radius in plan view may be R25m to 30m. Although diamond paper is used as the abrasive grain portion 30 in the lock radius example, it is not limited to this. Further, in the embodiment, the base metal 20 is sandwiched between the holders 40 and 50, but it is not limited to this. In the embodiment, two or more polishing abrasive grain portions 30 are provided, but the present invention is not limited to this. Abrasive grain portion 30 may be provided there.

The present invention is suitable for sharpening skating blades with a predetermined lock radius R.

DESCRIPTION OF SYMBOLS 10... Polishing tool for skate blades, 20... Base metal, 21... Concave part, 30... Abrasive grain part (polishing sheet), 31... Adhesive sheet, 32... Diamond layer, 40, 50... Holder, 46... Anti-slip part, 60... Guide part, 61... Bushing, 62... Elastic member, 70, 71... Fastening member, 80... Skate boot, 81... Blade, 82... Blade surface, R... Predetermined lock radius.

Claims (10)

A skate blade polishing tool for polishing a blade surface formed with a predetermined lock radius that bulges outward in a side view of a skate blade,
a base metal provided with a recess having a curvature equal to the curvature of the locking radius of the blade surface;
A sharpening tool for a skate blade, comprising: a sharpening grain portion provided in the concave portion for sharpening the blade surface. The sharpening tool for skate blades according to claim 1,
A polishing tool for a skate blade, wherein the abrasive grain portion is an adhesive seal-type polishing sheet that can be attached to and detached from the concave portion. 3. The sharpening tool for skate blades according to claim 1 or 2,
The base metal has a plate shape, and is provided with two side portions that are continuous with both arc-shaped edges of the recess,
Two holders formed larger than the base metal and abutting on the side portions to hold the base metal therebetween; and guide portions provided in the two holders for guiding the blade. Sharpening equipment for skate blades characterized by: The sharpening tool for skate blades according to claim 3,
A sharpening tool for skate blades, wherein the two holders and the base metal are fastened by a fastening member. A sharpening tool for skate blades according to claim 3 or 4,
A sharpener for skate blades, wherein the guide portion is composed of a plurality of resin bushings provided on the opposing surfaces of the two holders along the guide direction of the blade. instrument. The sharpening tool for skate blades according to claim 5,
A sharpening tool for skate blades, wherein each of the bushings is provided on the opposing surfaces of the holder so as to be height-adjustable. A sharpening tool for skate blades according to claim 5 or claim 6,
A sharpening tool for a skate blade, wherein the guide portion includes an elastic member disposed between the bushing and the holder to urge the bushing toward the blade. The sharpening tool for skate blades according to any one of claims 5 to 7,
A sharpening tool for skate blades, wherein the bushing and the elastic member are detachably attached to the holder. The sharpening tool for skate blades according to any one of claims 3 to 8,
A sharpening tool for skate blades, wherein the holder is provided with an anti-slip portion which is gripped by the operator's hand and prevents the operator's hand from slipping. The sharpening tool for skate blades according to any one of claims 1 to 9,
A plurality of the recesses are provided in the base metal,
A sharpening tool for a skate blade, wherein the abrasive grain portion is provided in each of the plurality of concave portions.

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