JPH09168404A - Skate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve driving force and cornering performance, and adjust bending strength despite lightweight by miniaturizing the width of the bottom part, which is an ice contact face of a blade in cross section viewed from the direction of movement, so as to be smaller than that of the top part. SOLUTION: A blade support 2 is coupled by a toe cup 3 and a heel cup 4 in the bottom of a shoe 7. A toe support 5 and a heel support 6 are provided in the front of the toe cup and the rear of the heel cup respectively and bending adjusters 25 for adjusting these bending rigidities are detachably provided thereon by bolts. The blade 1 is held by the blade support 2. The width of the top part 8 of the blade 1 is made larger than that of an ice contact face 9, for example, to be made into a V-shape cross sectional blade. This constitution can reduce frictional resistance, cause no lateral sliding, enables cornering at high speed, reduces development of crack in the blade, and adjusts bending rigidity of the blade.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to skates, and more particularly to ice skates featuring blades.

[0002]

2. Description of the Related Art In conventional skates, the width of the blade is constant from the uppermost portion to the ice contact portion when viewed from the traveling direction, and the width of the ice contact portion is constant from the front end portion to the rear end portion of the blade.
Such a blade is clamped and fixed by a blade support having a U-shaped cross section, and attached to the bottom of the shoe by a toe cup, a heel cup, and a toe support which are arranged so as to be coupled to the blade support. As the material of the blade, it is required to be lightweight, have strength, have wear resistance, have corrosion resistance, etc., but for most conventional blades, alloy tool steel is used,
At most, heat treatment was applied to improve hardness and the like. Such a conventional alloy tool steel blade has a heavy weight and a heavy burden on the skater. Further, since the abrasion resistance is low, the abrasion is severe and it is necessary to sharpen the edge frequently, and since the corrosion resistance is low, it is necessary to perform anticorrosion treatment each time it is used. Further, since alloy tool steel is brittle in a low temperature environment, an accident in which a blade is chipped sometimes occurs when it is used in an extremely cold region. Thus, conventional blades have not always been satisfactory.

[0003]

SUMMARY OF THE INVENTION In view of the problems of the prior art, the present invention provides a lightweight, easy-to-handle and safe skate. Furthermore, in skating competitions, especially speed skating competitions, skates that satisfy the demanding requirements that are being demanded from the situation in which competition is performed at a high level year by year due to the speeding up of the skating rink and the training of athletes. Is. Specifically, it provides more propulsive force and good cornering performance. By the way, in order to actually perform skating, the blade needs to be elastically deformed in the lateral direction with respect to the traveling direction or bent in the up-down direction, etc., and if it is not bent at all, good skating cannot be performed. is there. The bending strength has a great influence on the skating performance, particularly the performance at the time of cornering, and the strength required depends on the physical strength and skill of the user. However, in the past, this strength could not be adjusted, and in particular, top-ranked athletes have demanded skates with adjustable bending strength. The present invention provides skates having a mechanism capable of adjusting the bending strength.

[0004]

Means for Solving the Problems The present invention provides "1. Skating in which the width of the lowermost portion, which is the ice contact portion of the cross section of the blade viewed from the traveling direction, is smaller than the width of the uppermost portion. Is 0.3m wider than the width of the shoe
Skates described in item 1 that are smaller than m. 3. A minimum width part less than or equal to the lowermost part is provided at a position between the lowermost part and the uppermost part, which is the ice contact part of the cross section of the blade viewed from the traveling direction, and is approximately 1/2 or less of the height of the blade The width of the cross section of the blade is gradually reduced between the minimum width portions, and the width of the cross section of the blade is minimized or gradually increased between the minimum width portion and the bottom portion. The listed skates. 4. The skate according to any one of claims 1 to 3, which is a blade formed by welding separately formed blades between a lowermost portion and a minimum width portion and an uppermost portion and a minimum width portion. 5. The skates according to any one of items 1 to 4, wherein the width of the rear end of the blade when viewed from the ice contact portion is smaller than the width of the front end. 6. The skate according to any one of items 1 to 5, wherein the width of the rear end of the blade is 0.3 mm or more smaller than the width of the front end. 7. Between the front edge and the rear edge of the blade, a minimum width ice contact area smaller than the width of the front edge is provided, and the width of the blade ice contact area is gradually reduced between the front edge and the minimum width area of the blade. The skates according to any one of items 1 to 6, wherein the width of the blade is minimized or gradually increased between the rear ends. 8. Put the smallest width ice contact part from the rear end of the blade to 1 / of the front end.
The skates according to any one of items 1 to 7, which are arranged between the two. 9. 1 to 8 in which an opening is formed in the side surface of the blade
Skating according to any one of paragraphs. 10. A plurality of apertures are provided in series in the advancing direction of the blade,
The skates according to any one of items 1 to 9. 11. 11. The skate according to any one of items 1 to 10, wherein the opening in the front end direction and the rear end direction of the blade has an opening ratio smaller than that of the central part. 12. The skate according to any one of items 1 to 11, wherein collision-resistant portions having no openings are provided at the front end portion and the rear end portion of the blade. 13. The distance between the bottom of the blade and the bottom of the aperture is 3.0
˜10.0 mm, the distance between the top of the blade and the upper end of the aperture is 1.0 to 5.0 mm, and the distance between the upper and lower ends of the aperture is ¼ to 4 / the height of the blade. 5, which is 1
The skates according to any one of items 1 to 12. 14． The skate according to any one of items 1 to 13, further comprising a heel support for fixing a rear portion of the blade to the shoe. 15. A toe support and / or heel support for fixing the blade to the shoe is detachably provided with a bending adjusting material for adjusting the bending rigidity of the support.
The skates according to any one of items 1 to 14. 16. The skate according to any one of items 1 to 15, wherein the bending adjusting member is a plate-shaped member and is detachably installed on the support by a bolt. 17． Blade, blade support, toe cup,
The skates according to any one of items 1 to 16, wherein all or a part of the heel cup, the toe support, and the heel support are formed of one or two or more selected from titanium, titanium alloy, aluminum, and aluminum alloy. . 18. At least the ice contact part of the blade is Al or V, F
1 to 1 formed of an alloy in which TiC and Cr ₃ C ₂ and / or W ₂ C of particles of 50 μm or less are mixed in a Ti alloy containing 1 or more of e, N, Cu, Sn, Zn, and Mo. Skating according to any one of paragraphs 17. 19. The skate according to any one of items 1 to 18, wherein the blade support is a cylinder, and an upper part of the blade and a lower part of the blade support are welded and fixed to each other. 20. A taper groove that opens downward in the blade support and narrows on the lower side is formed in the length direction of the blade, and the blade is pressed onto the upper surface with a screw to crimp and fix the taper groove 1
Alternatively, the skate according to any one of items 1 to 19, which is provided with two or more screw holes. 21. The lock surface of the blade is a front surface, a front surface, an intermediate portion, and a rear surface, which are four curved surfaces, and the radius of the curved surface is a locking surface that gradually increases from the front portion toward the rear portion.
The skates described in any one of items 1 to 19. 22. The curve of the lock surface of the blade is r ² = 2a ³ co
The lemniskate curve represented by s2θ is 0 ≦ θ ≦ 4
The skate according to any one of items 1 to 21, wherein a curve included in the curve in the range of 5 ° and close to the origin is the rear part of the blade. 23. The curve of the blade lock surface is included in the curve of the hyperbolic spiral curve represented by rθ = a in the range of 30 ° ≦ θ ≦ 270 °, and the curve close to the origin is the rear part of the blade. The skates according to any one of items 1 to 21. About.

The first feature of the present invention is that the width of the lowermost portion which is the ice contact portion of the cross section as viewed from the advancing direction of the blade is smaller than the width of the uppermost portion which is the attachment portion, and is formed in a so-called wedge shape. By reducing the width of the ice contact surface, the area of the blade cross section can be reduced, and the weight of the blade can be reduced. Further, since the blade is wedge-shaped with respect to the ice, the ice is pressed in the width direction of the blade, so that the ice can slide without breaking, and more propulsive force can be obtained. This effect is the wedge effect. Further, since the width of the ice contact surface of the blade is small, it is possible to instantaneously switch from the outer edge to the inner edge, and the time for sliding on a flat surface is shortened, the frictional force is reduced, and the speed can be improved. This is an advanced person who slides into the ice diagonally from the outer edge side of the blade when sliding, then tilts to the inner edge side via the flat state and then kicks the ice,
Especially, it is a favorable effect for athletes. In addition, a minimum width that is less than or equal to the width of the bottom is formed between the bottom and the top, and the width gradually decreases from the width of the top to the width of the bottom. As the width gradually increases, the angle at which the blade enters the ice becomes sharp when kicking the ice or when cornering, so skidding does not occur, more efficient propulsion is obtained, and cornering can be performed at high speed. The effect that can be achieved is exhibited. Due to this effect, the accident of falling due to skidding due to centrifugal force being lost during cornering is eliminated.

A second feature of the present invention is that the width of the rear end of the ice contact surface of the blade is made smaller than the width of the front end. By reducing the width of the rear end portion, the area of the blade ice contact surface can be reduced, and the weight of the blade can be reduced. Further, the ice is melted at the front end, and the rear end having a small width after the front end passes over the water produced by the melting, so that it is possible to slide with less frictional force. Furthermore, at the last moment of kicking the ice, that is, when kicking at the front edge of the blade,
Due to the wedge effect of entering the ice in a wedge shape with respect to the kicking direction and the synergistic effect of being able to kick with a blade part having a large width, a large propulsive force forward can be obtained without breaking the ice. Further, a minimum width of the ice-contacting surface is formed between the front end and the rear end of the ice-contacting surface of the blade, and the minimum width of the ice-contacting surface is less than the width of the rear end, and The width gradually decreases up to the minimum width portion and the width gradually increases from the minimum width portion to the rear end portion, a turning force assisting effect occurs and cornering performance is improved. Because, with the above configuration, an edge in the same direction as the cornering direction is formed on the edge on the side used during cornering, that is, the edge in the inner circumferential direction of the corner ring, and when it actually slips it bends naturally in the direction of the radius. This is because.

The third feature of the present invention is that an opening is formed on the side surface of the blade. By forming the aperture, the weight of the blade can be reduced. In addition, depending on the size and the position of the opening, it is possible to adjust the bending in the lateral direction with the blade mounting portion as a fulcrum when viewed from the traveling direction of the blade. For example, by increasing the width of the uppermost portion, which is the mounting portion of the blade, more than necessary, greatly reducing the lateral bending with the blade mounting portion as a fulcrum when viewed from the traveling direction of the blade, and the blade of the blade. The blade with the stronger connection to the support is provided with an opening to adjust the bending. Therefore,
The strength of the connection of the blade to the blade support is sufficient, and it is possible to obtain a blade that is easily bent. In this way, when the blade is bent easily in the lateral direction with the blade mounting portion as a fulcrum when viewed from the traveling direction of the blade, the kick reaction force at the end of kicking the ice allows more kick force to be obtained and propulsive force to be obtained. It is possible. It should be noted that it is desirable to dispose collision-resistant portions having no openings at the front end portion and the rear end portion of the blade so that they will not be damaged when they collide.

A fourth feature of the present invention is that a toe support and / or a heel support can be detachably provided with a bending adjusting member for adjusting a bending rigidity in a lateral direction and / or a vertical direction with respect to a traveling direction of the toe support and / or the heel support. It has been installed. By adjusting the bending rigidity in the left-right direction and / or the up-down direction with respect to the advancing direction of the toe support and / or the heel support, the bending rigidity of the front part of the blade with respect to the toe cup and / or the rear part of the heel cup is adjusted. For example, prepare multiple metal plate-shaped members with different thicknesses, widths, and lengths that have different rigidity, select them according to the situation, and combine them in some cases with bolts for the toe support and / or heel support. It is installed in. As mentioned above, in order to actually perform skating, it is necessary for the blade to bend laterally with respect to the advancing direction, and to be elastically deformed in the vertical direction, etc.This bending strength is skating performance, especially during cornering. It has a great impact on performance. The blade withstands centrifugal force during cornering and receives a reaction force from the ice, but the part between the toe cup and the heel cup that is firmly supported by the toe cup and the heel cup does not bend, but its front and rear parts are the front end. It tries to bend inward because the part and rear end are free. Then, the cornering can be performed smoothly with less resistance by bending to the inner peripheral side. However, it is necessary to be able to adjust this bending strength, because how much force and how much to bend can vary depending on the weight and muscular strength of the user. Also, if it is adjustable like this,
Bending strength can be controlled numerically. For example, the toe cup and the heel cup are fixed, and a certain force is applied to the front and rear ends of the blade to measure the bending.

A fifth feature of the present invention is that all or a part of the blade, the blade support, the toe cup, the heel cup, the toe support, and the heel support are made of titanium, titanium alloy, and preferably, carbide-dispersed titanium alloy aluminum,
It is composed of one or more materials selected from aluminum alloys. Since titanium and titanium alloys are lightweight, it has been proposed to use them for blades. However, since titanium has a small Young's modulus, the width of the uppermost portion, which is the mounting portion of the blade, must be made larger than the width of the conventional alloy tool steel.Therefore, it is necessary to use a thick and thick blade. Not only that, the original purpose of reducing the weight cannot be obtained, but there is also a problem that the friction force is large due to the unnecessarily wide ice contact surface and the propulsion force cannot be obtained. According to the present invention, even if the width of the uppermost portion, which is the mounting portion of the blade, is increased, the width of the ice contact portion is formed to be small due to the first characteristic, so that the effect of the lightweight material can be sufficiently obtained. . Furthermore, by using a titanium material, rust prevention treatment is not necessary, it has high wear resistance and low friction resistance on the ice contact surface, it can be polished with a water grindstone, there is little occurrence of cracks, etc. Welding repairs are possible, and other effects are also achieved.

A sixth feature of the present invention is that the blade support is a cylindrical body, and the uppermost blade and the lower portion of the blade support are attached by welding. conventionally,
The blade was sandwiched by a blade support having a U-shaped cross section and welded to maintain the fixing strength, but in the present invention, as described above, the width of the uppermost portion, which is the mounting portion of the blade, can be made larger than before, Even if the blade support is formed of a complete cylindrical body and directly welded onto the cylindrical body, it is possible to maintain sufficient fixing strength. Therefore, a part of the blade support for sandwiching the blade is not necessary, and the weight can be reduced accordingly. In addition, a tapered groove is formed in the blade support in the direction of travel, and the blade is inserted in this groove from the front part or the rear part, and the blade is moved downward with a cotter-type holoset screw. It is also possible to pressurize and attach. This method is effective when a blade having a V-shaped cross section is adopted. That is, the blade is pressed into the tapered groove like a wedge and firmly fixed. Further, by loosening the screw, the blade can be removed, and the worn blade can be replaced.

The seventh feature of the present invention is that the curve of the blade lock is formed by four different rounded shapes of the tip portion, the front portion, the middle portion and the rear portion, and the size of the roundness is changed from the tip portion to the rear portion. It is a big thing toward. This is especially effective for speed skating. The curve of the lock of the conventional blade is that the radius is in the middle part, the rear part, the front part,
It was the tip. This rock curve is desirable for skates that repeatedly move forward and backward like figures and hockey, but was not suitable for speed skating where forward movement is the main. By increasing the radius of the rear part, propulsive force to the front part can be obtained. The most desirable curve is the lock surface curve r ² = 2a ³ cos 2θ
The curve included in the curve of 0 ≦ θ ≦ 45 ° of the lemniskate represented by the curve near the origin is the rear part of the blade, and the numerical value calculated from the curve is used for the NC machine. It can be set digitally to make a smooth curve without an inflection point. This makes it possible to smooth the fluctuation of the width of the blade. A blade in which the curve of the lock surface is included in the curve of the hyperbolic swirl curve represented by rθ = a in the range of 30 ° ≦ θ ≦ 270 °, and the curve close to the origin is the rear part of the blade is also preferable. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The width of an ice contact portion, which is a typical shape of a skate blade of the present invention, is made smaller than the width of the uppermost portion,
A blade having a width at the rear end smaller than that at the front end is formed of a titanium alloy or the like with a plate-shaped body having a V-shaped cross-section such that the rear end is located in the lower portion where the width of the plate-shaped body is small. The plate-shaped body can be manufactured by press-cutting and punching once. Of course, it can be manufactured by shaving, leather cutting, wire cutting, water jet cutting, or the like, but press cutting has an advantage that openings on the side surface of the blade can be simultaneously formed. Blades having various shapes can be manufactured by changing the shape of the plate-shaped body. A blade having a minimum width portion between the uppermost portion of the blade and the ice contact portion has a different titanium alloy in the upper and lower portions, for example, Ti-6Al-4V alloy in the upper portion,
The lower containing _cr 3 _{c 2} or _{W 2} C and TiC Ti-
The most rational is to make it from a tAl-4V alloy and weld it at the minimum width part. From the economical viewpoint, a titanium alloy containing Fe and N is desirable. The bending adjusting material for adjusting the bending of the toe support and the heel support is a plate-shaped member, but a rod-shaped member can also be used. Since it is necessary to select an adjusting material suitable for the skater's weight, muscle strength, ice quality, etc., attach it to the support with a removable fastener such as a bolt.

[0013]

EXAMPLES Next, examples of the present invention will be shown and specifically described in comparison with conventional examples.

FIG. 1 is an explanatory view showing an embodiment of the skates of the present invention. 7 is a shoe with a toe cup 3 on the bottom thereof
And a heel cup 4 are fixedly attached, and the blade support 2 is connected and installed by this cup. A toe support 5 that connects the shoe and the blade support is installed in front of the toe cup, and a bending adjusting material 25 that adjusts the bending rigidity of the toe support is detachably arranged by bolts. A heel support 6 that connects the shoe and the blade support is installed behind the heel cup, and a bending adjusting material 21 that adjusts the bending rigidity of the heel support is detachably arranged by a bolt. A blade 1 is held by a blade support. An opening 14 is provided on the side surface of the blade,
Collision-resistant parts 15 are provided at the front end and the rear end.

FIG. 2 is a sectional view of the skates, in which the blade is welded to a cylindrical blade support. The blade 1 has a minimum width portion 10 formed between the uppermost portion 8 welded to the blade support and the ice contact portion 9.

FIG. 3 is a view of the blade as seen from the ice contact surface. The width 11 of the front end portion in the advancing direction of the blade is wider than the width 12 of the rear end portion, and the ice contact is between the front end portion and the rear end portion. The minimum width portion 13 of the surface is formed.

FIG. 4 shows a cross section of the blade cut at a right angle to the longitudinal direction. The uppermost portion 8 of the blade is wider than the ice contact surface 9. The shape of this blade having a V-shaped cross section is the basic shape of the blade used in the present invention. In addition, the deformation of the blade whose top width is wider than that of the ice contact part is shown below.

In FIG. 5, the width of the blade is the uppermost width up to the central portion and the width of the blade is 16 near the middle portion of the rectangular cross section.
Is a blade in which the width is reduced to form a curved surface portion 17 and the curved portion 17 is connected to an ice contact portion having a narrow width. Also in this case, the width of the blade is larger at the uppermost portion than the ice contact portion.

FIG. 6 shows a blade having a Y-shaped cross section in which a rectangular lower portion 19 having the width of the ice contact portion is connected to an upper portion 18 having a V-shaped cross section. The width of the uppermost part of this blade is larger than the width of the ice contact part. FIG. 7 shows a blade having a K-shaped cross section in which a rectangular lower portion 19 having the width of an ice contact portion is connected to an upper portion 18 having a right triangle shape in cross section. The width of the uppermost part of this blade is larger than the width of the ice contact part. FIG. 8 shows a blade in which a rectangular upper portion 18 having the uppermost width is connected to a lower rectangular portion 19 having the width of the ice contact portion. The width of the uppermost part of this blade is larger than that of the ice contact part. Fig. 9 shows that the width is gradually reduced from the top, and it is about 1/3 of the height of the blade.
A blade having an X-shaped cross-section in which the minimum width portion 10 is formed at the position of and the width gradually increases toward the ice contact portion, and the width of the uppermost portion of this blade is larger than that of the ice contact portion. FIG. 10 shows a blade in which an upper portion 18 having a rectangular cross section of the uppermost width and an inverted V-shaped lower portion 19 whose width is gradually reduced is joined from the lowermost end of the width of the ice contacting portion. The width of the upper part is larger than the width of the ice contact part.

FIG. 11 is an explanatory view of one embodiment of manufacturing the blade. A plate-shaped body in which the front end portion 21 and the rear end portion 22 are formed in advance with a V-shaped titanium alloy or the like having the same width, and the rear end portion of the blade is lowered from the uppermost surface of the plate to the ice contact surface of the intermediate portion 20. Is cut at a lowermost part where the width of the plate is small, and in one step, a blade having a front end 20 of the ice contact surface 23 wider than the rear end 22 and a minimum width in the middle is manufactured. be able to.

12 and 13, a tapered groove having a narrower lower side is formed in the blade support in the advancing direction, and the blade is inserted into this groove and is downwardly applied by a cotter-type screw such as a holoset screw. 3 illustrates a cross section taken at a right angle to the length direction of the blade support and the blade for explaining the method of the embodiment of pressing and attaching. In the embodiment shown in FIG. 12, the blade support 2 is formed by welding the groove forming member 28 in which the tapered groove 29 is formed in the traveling direction to the pipe 27. A screw hole 30 is formed in the blade support 2 from above so as to communicate with the tapered groove. The pipe 27 has an insertion hole 31 for inserting the screw 26 and tightening the screw 26 with a screwdriver or the like. The blade 1 is inserted into the tapered groove 29, the ridge 26 is closed, and the blade 1 is pressed and fixed under pressure. In the embodiment, a horoset screw is used as the screw 26, and ten screws are arranged in the traveling direction. Further, the screw 26 was securely fixed with low temperature brazing. Of course, the groove forming member 28 may be formed separately in the traveling direction. Further, the number of screws to be arranged is not limited, and may be fixed at about 3 to 15.

In the embodiment shown in FIG. 13, the blade support 2 having a V-shaped cross section, the tapered groove 29, and the screw hole 30.
Was formed. In the embodiment, the blade support 2 is formed by integral molding of synthetic resin. It is desirable to securely fix the screws with an adhesive.

FIG. 14 is an explanatory view of a conventional skate, in which the blade support 2 is fixed by the toe cup 3, heel cup 4 and toe support 5 provided at the bottom of the shoe 7, and the blade 1 is held by the blade support. It has a structure. FIG. 15 shows a cross section of the skate of FIG. 14, in which the blade 1 has the same width as the uppermost portion and the ice contact portion, and is sandwiched and held by the blade support 2. FIG. 16 shows the ice contact portion of the blade, which has the same width from the front end portion to the rear end portion. A conventional blade with a width of 1.06 mm made of alloy tool steel has a width of 1.2 at the top.
It is possible to reduce the weight by 23g by providing an opening with a width of 0mm and a width of 0.53mm at the bottom, and by using titanium or a titanium alloy for the entire skates other than shoes, it is made of the same bending material and has high strength. Skating is safer and the skates that were 365g on one leg are 235g
And the weight was reduced by 130g.

[0024]

EFFECTS OF THE INVENTION The skates of the present invention are lightweight, have a high rust-free propulsive force, have a low frictional resistance, have a high wear resistance and have a long life, do not skid, and can corner at high speed.
Blades rarely crack, and even if they do occur, welding repairs can be performed, and the bending rigidity of the blades can be adjusted, so that excellent effects such as being able to deal with various types of ice can be achieved. .

[Brief description of the drawings]

FIG. 1 is an explanatory view of skates according to the present invention.

FIG. 2 is a cross-sectional view of skates.

FIG. 3 is an explanatory diagram of an ice contact surface of a blade.

FIG. 4 is a cross-sectional view of a blade of an example.

FIG. 5 is a cross-sectional view of a blade of another embodiment.

FIG. 6 is a cross-sectional view of a blade of another embodiment.

FIG. 7 is a cross-sectional view of a blade of another embodiment.

FIG. 8 is a sectional view of a blade of another embodiment.

FIG. 9 is a cross-sectional view of a blade of another embodiment.

FIG. 10 is a sectional view of a blade of another embodiment.

FIG. 11 is an explanatory diagram showing a method for manufacturing a blade according to the present invention.

FIG. 12 is an explanatory diagram showing a method of attaching the blade of the present invention.

FIG. 13 is an explanatory view showing a method of attaching the blade of the present invention.

FIG. 14 is an explanatory diagram of a conventional skate.

FIG. 15 is a cross-sectional view of a conventional skate.

FIG. 16 is an explanatory diagram of an ice contact surface of a conventional blade.

[Explanation of symbols]

 1 blade 2 blade support 3 toe cup 4 heel cup 5 toe support 6 heel support 7 shoes 8 uppermost blade 9 blade ice contact surface 10 blade minimum width 11 blade ice contact surface front end 12 blade ice contact surface rear end 13 blade contact Ice surface minimum width part 14 Opening hole 15 Collision resistant part 16 Blade middle part 17 Blade curved part 18 Blade upper part 19 Blade lower part 20 Middle part 21 Front end part 22 Rear end part 23 Blade rear end part 24 Ice contact surface 25 Bending adjustment Material

Claims (23)

[Claims] 1. A skate in which the width of the lowermost portion, which is the icing portion of the cross section of the blade as viewed from the traveling direction, is smaller than the width of the uppermost portion. 2. The skates according to claim 1, wherein the width of the lowermost portion is 0.3 mm or more smaller than the width of the attachment portion with the shoe. 3. The height of the blade between the lowermost portion and the uppermost portion, which is the icing portion of the cross section of the blade seen from the traveling direction, is approximately 1
The width of the blade cross section is gradually reduced between the uppermost part and the minimum width part by providing the minimum width part less than the lowermost part at the position of / 2 or less, and the blade cross section between the minimum width part and the lowermost part. The skates according to claim 1 or 2, wherein the width of the skates is the minimum width or the width is gradually increased. 4. The blade according to claim 1, wherein the blade is formed by welding a portion between the lowermost portion and the minimum width portion and a portion between the uppermost portion and the minimum width portion which are separately molded. The listed skates. 5. The width of the rear end of the blade as viewed from the ice contact portion is made smaller than the width of the front end.
Skating described in paragraph. 6. The width of the rear end of the blade is less than that of the front end.
Any one of claims 1 to 5, wherein the size is reduced by 3 mm or more.
Skating described in paragraph. 7. An ice contact portion having a minimum width smaller than the width of the front end is provided between the front end and the rear end of the blade, and the width of the ice contact portion of the blade is gradually reduced between the front end and the minimum width portion of the blade. The skate according to any one of claims 1 to 6, wherein the width of the blade is minimized or gradually increased between the minimum width portion and the rear end. 8. The skates according to claim 1, wherein the ice contact portion having the smallest width is arranged between the rear end and the front end of the blade. 9. The skates according to claim 1, wherein an opening is formed in the side surface of the blade. 10. The skates according to claim 1, wherein a plurality of apertures are continuously provided in the advancing direction of the blade. 11. The skate according to any one of claims 1 to 10, wherein the opening in the front end direction and the rear end direction of the blade is an opening having a smaller opening ratio than the opening in the central portion. 12. The skate according to any one of claims 1 to 11, wherein collision-resistant portions having no openings are arranged at the front end portion and the rear end portion of the blade. 13. The distance between the lowermost part of the blade and the lower end of the aperture is 3.0 to 10.0 mm, and the distance between the uppermost part of the blade and the upper end of the aperture is 1.0 to 5.0 mm, Skate according to any one of claims 1 to 12, wherein the distance between the upper end and the lower end of the opening is 1/4 to 4/5 of the height of the blade. 14. A heel support for fixing the rear part of the blade to the shoe is installed.
Skating described in paragraph. 15. A toe support and / or a heel support for fixing a blade to a shoe, wherein a bending adjusting material for adjusting the bending rigidity of the support is detachably installed. skate. 16. The bending adjustment material is a plate-shaped member, and is detachably installed on the support by bolts,
Skating according to any one of claims 1 to 15. 17. The blade, the blade support, the toe cup, the heel cup, the toe support and the heel support are wholly or partially formed of one or more selected from titanium, titanium alloy, aluminum and aluminum alloy. The skates according to any one of 1 to 16. 18. At least the ice contact portion of the blade is made of Al or V, Fe, N, Cu, Sn, Zn, or Mo.
Ti alloy containing the above TiC and C of particles of 50 μm or less
r ₃ is formed with C ₂ and or W _{2 C} contaminating alloy, skate as claimed in any one of claims 1 to 17. 19. The skates according to claim 1, wherein the blade support is a cylinder, and the upper part of the blade and the lower part of the blade support are fixed by welding. 20. A taper groove that opens downward in the blade support and narrows on the lower side is formed in the length direction of the blade,
20. The skates according to claim 1, wherein the upper surface is provided with one or more screw holes for pressing a blade with a screw and crimping and fixing it in a taper groove. 21. The lock surface of the blade is composed of four curved surfaces of a tip portion, a front portion, an intermediate portion, and a rear portion, and the radius of the curved surface is a lock surface which gradually increases from the tip portion to the rear portion. Skating according to any one of 1 to 19. 22. The curve of the lock surface of the blade is r ² = 2
0 of the curve of lemniskate represented by a ³ cos 2θ
The skate according to any one of claims 1 to 21, wherein a curve included in a curve in the range of ≤ θ ≤ 45 ° and close to the origin is the rear part of the blade. 23. The curve of the lock surface of the blade is rθ = a
The hyperbolic swirl curve represented by the curve included in the curve in the range of 30 ° ≦ θ ≦ 270 °, which is close to the origin is the rear portion of the blade. Skating described.