Racing shoe

Abstract

To provide a racing shoe to be worn by a motor racing driver, preventing the driver from easily slipping and getting tired when stepping on a pedal and improving responsiveness of a pedal operation.SOLUTION: A racing shoe comprises: an insole 6 closely fitting to a sole of a driver's foot; an upper 2 joined to the insole and covering the driver's foot from above; and an outsole 4 joined to a lower part of the insole and coming into contact with a pedal of a vehicle. The outsole includes: a first protruding strip extending along just below a plantar fascia from a heel of the driver's foot to the toe base part of the driver's foot; a second protruding strip disposed at a side closer to a plantar arch cap than the first protruding strip; a third protruding strip disposed just below a cuboid bone of the driver's foot; and a pedal contact band part formed in a lateral direction of the outsole from the toe base part of the driver's foot to just below an adductor pollicis transverse head.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to racing shoes, and more particularly to racing shoes worn by drivers in motor racing events. [Background technology]

[0002] 2. Description of the Related Art In recent years, technology has been developed for shoes worn while driving a vehicle that are designed to reduce fatigue and provide good response to pedal operation.

[0003] For example, Patent Document 1 discloses a running shoe that enables smooth and quick walking and running movements by having a sole that can appropriately control the movement of the center of foot pressure with a simple structure.

[0004] The shoes disclosed in Patent Document 1 are shoes with a sole including a sole body constituting the bottom of the footwear, and a foot pressure guide part provided on the sole body to guide the center of foot pressure, which is the center of pressure applied to the sole of the foot that moves with walking and running, along a predetermined foot pressure center path from the heel to the base of the fourth toe. With this structure, the center of foot pressure accompanying walking and running movements can be guided from the heel to the base of the fourth toe regardless of the habits of the wearer of the footwear with this sole, and the thighs can be naturally rotated inward using the hip joint, and the lower legs and soles of the feet can be reflexively swung out without unnecessary muscle tension, so that wearing the shoes makes it easy to perform optimal walking and running movements. Therefore, the burden on the bones and muscles of the legs and hips can be reduced, and stable, smooth and quick walking and running movements can be performed regardless of the habits of walking and running movements.

[0005] In the case of the sole disclosed in Patent Document 1, the outsole is made of only a flat one-layer sheet, and the sheet surface is smooth. In general, when a person steps on and releases the pedal of a vehicle, the person moves the center of gravity by landing from the heel to the toe in sequence and then lifting off from the toe to the heel in sequence. At this time, it is known that the center of pressure on the sole of the foot also moves from the heel to the toe, especially from the thenar eminence, and the trajectory of this center of pressure is an important factor that indicates the aptitude of the action of stepping on and releasing the pedal. The pedals of automobiles used in automobile racing are not covered with rubber like ordinary passenger car pedals, but have exposed metal, and have a slippery structure with multiple openings on the pedal surface. For this reason, the outsole disclosed in Patent Document 1 has a smooth and slippery sheet surface, and since it is a flat one-layer sheet, there is a problem that if the pedal is pressed down many times in automobile racing, the plantar muscles are severely worn out, and the response of the pedal operation becomes poor. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2007 / 086251 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the present invention has been made in consideration of the above problems, and aims to provide racing shoes for use in automobile racing that can prevent the driver from slipping or getting tired when stepping on the pedals, and also improve the responsiveness of the pedal operation. [Means for solving the problem]

[0008] In order to solve the above problems, a racing shoe according to one embodiment of the present invention is a racing shoe worn by a driver in an automobile race, and comprises an insole that fits closely to the sole of the driver's foot, an upper that is joined to the insole and covers the driver's foot from above, and an outsole that is joined to the lower part of the insole and abuts against the pedal of the automobile, the outsole comprising a first protrusion extending along just below the plantar fascia from the heel of the driver's foot to the base of the driver's toes, a second protrusion positioned closer to the plantar arch than the first protrusion, a third protrusion positioned just below the cuboid bone of the driver's foot, and a pedal abutment zone formed in the short direction of the outsole from the base of the driver's toes to just below the transverse head of the adductor pollicis.

[0009] In the above-mentioned racing shoe, the upper and the outsole may be made of a flame-retardant material.

[0010] In the above-mentioned racing shoes, the outsole is formed from any one of nitrile rubber, butadiene rubber, and chloroprene rubber, or a mixture of these, and may contain at least vanadium, calcium carbonate, and calcium sulfate as a flame retardant.

[0011] In the above-mentioned racing shoe, the upper may be made of a flame-retardant fiber.

[0012] In the above-mentioned racing shoe, the pedal contact zone may have a plurality of equally spaced grooves.

[0013] In the above racing shoe, the first ridge may extend along immediately below the plantar fascia from the heel of the driver's foot to the base of the fourth toe of the driver's foot.

[0014] In the above-mentioned racing shoe, the tops of the first ridges, the second ridges and the third ridges may be flat and all have the same height.

[0015] In the racing shoe, a first narrow portion may be provided at an end of the first ridge.

[0016] In the racing shoe, the third ridge may be provided at an end thereof with a third narrow portion.

[0017] In the racing shoe, the first and third ridges may be disposed on an upper side of the pedal contact belt.

[0018] In the racing shoe, a midsole may be interposed between the insole and the outsole.

[0019] In the above-mentioned racing shoe, the upper may be provided with a heel protection portion for protecting the heel of the driver's foot. Effect of the Invention

[0020] The racing shoes of the present invention comprise an insole that fits closely to the sole of the driver's foot, an upper that is joined to the insole and covers the driver's foot from above, and an outsole that is joined to the lower part of the insole and abuts against the pedal of the automobile, the outsole comprising a first protrusion extending along just below the plantar fascia from the heel of the driver's foot to the base of the driver's toes, a second protrusion positioned closer to the plantar arch than the first protrusion, a third protrusion positioned just below the cuboid bone of the driver's foot, and a pedal abutment belt formed in the short direction of the outsole from the base of the driver's toes to just below the transverse head of the adductor pollicis, so that the racing shoes used in automobile racing are less likely to slip and tire the user when stepping on the pedals, and can improve the responsiveness of the pedal operation. [Brief description of the drawings]

[0021] [Figure 1] 1A to 1C are schematic diagrams illustrating the action of stepping on a pedal with a racing shoe according to an embodiment of the present invention. [Diagram 2] 1 is an exploded perspective view showing a racing shoe according to an embodiment of the present invention. [Diagram 3]1 is a diagram showing the entirety of a racing shoe according to an embodiment of the present invention in use. [Figure 4] FIG. 2 is a diagram showing a tongue of a racing shoe according to an embodiment of the present invention. [Diagram 5] 1 is a diagram showing a heel protection part of a racing shoe according to an embodiment of the present invention. [Figure 6] 1 is a diagram showing a hook-and-loop fastener and a label in a racing shoe according to an embodiment of the present invention. [Figure 7] 13 is another diagram showing a hook-and-loop fastener and a label in a racing shoe according to an embodiment of the present invention. FIG. [Figure 8] 1 is a bottom view of a racing shoe according to an embodiment of the present invention. [Figure 9] 1 is a front view of a racing shoe according to an embodiment of the present invention. [Figure 10] 1 is a left side view of a racing shoe according to an embodiment of the present invention. [Figure 11] FIG. 9 is an enlarged end view of a cut portion along line AA in FIG. 8. [Figure 12] 9 is an end view of the section taken along line BB in FIG. 8. [Figure 13] 1 is a bottom view showing a schematic diagram of a racing shoe according to an embodiment of the present invention. [Figure 14] 14 is an end view of the section taken along line VV in FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The racing shoes of this embodiment are used as footwear such as shoes for racing in various vehicles such as automobile races. The racing shoes increase the amount of friction between the soles of the shoes and the exposed metal on the pedal surfaces when the wearer operates pedals such as the accelerator pedal, brake pedal, clutch pedal, etc., on the driver's seat of the vehicle by stepping on these pedals, thereby preventing slipping. In addition, the racing shoes reduce fatigue caused by repeatedly stepping on and releasing the pedals during long races such as automobile races.

[0023] A racing shoe 1 according to the present embodiment will be described with reference to various figures, including Fig. 1. As can be seen from the schematic side view of Fig. 1, the sole of the racing shoe 1 is placed on the upper surfaces of various pedals protruding from the floor surface of the driver's seat of a vehicle, such as an accelerator pedal, a brake pedal, and a clutch pedal, and the user applies force with their foot to press down on a pedal 10 with that pressure.

[0024] The racing shoe 1 of this embodiment has a lining structure, and is entirely covered with NOMEX (registered trademark) manufactured by DuPont. NOMEX is made of 0.38 mm meta-aramid fiber. A heel counter manufactured by MILAX is placed in the heel part.

[0025] As can be seen from the exploded perspective view of FIG. 2, the racing shoe 1 of this embodiment is provided with an upper 2, an insole 6, a midsole 5, and an outsole 4, which are layered from the top. In the illustrated embodiment, the upper 2 is attached to the racing shoe 1. A heel protection part 7 is attached to the rear and bottom part of the upper 2. An insole 6 is attached as an inner sole of the racing shoe 1, and an outsole 4 is attached to the outer surface of the bottom of the racing shoe 1. A midsole 5 is attached between the insole 6 and the outsole 4 so as to cover the rear half of the racing shoe 1. Instead of the outsole 4, a material with a tuck feeling such as an anti-slip material may be attached to the bottom plate of the racing shoe 1.

[0026] 3 is a usage diagram showing the state in which the driver actually puts his foot into the racing shoe 1 after assembling the various components of the racing shoe 1. A hook-and-loop fastener 8 is provided so as to cross the center from above in the left-right direction. The hook-and-loop fastener 8 has a first hook-and-loop fastener 81 and a second hook-and-loop fastener 82. The upper 2 is restrained by these two hook-and-loop fasteners 81 and 82, thereby preventing the driver's foot from coming off the racing shoe 1. The fit (wearability) between the driver's foot and the racing shoe 1 is improved, and the racing shoe 1 moves in accordance with the movement of the foot, allowing the driver to operate the pedals without any wasted foot movement.

[0027] A tongue 3 is provided on the upper part of the racing shoe 1. The tongue 3 is provided on the back surface of the upper 2, and serves to protect the instep of the driver's foot when the hook-and-loop fastener 8 restrains the driver's foot. The tongue 3 can be made of smooth steer leather (cowhide).

[0028] FIG. 4 is a diagram showing the racing shoe 1 with the tongue 3 attached. (a) is a diagram showing the state where the hook-and-loop fastener 8 is attached and a cover is attached. (b) is a diagram showing the inside of the racing shoe 1 with the cover removed and the tongue 3 pulled up. (c) is a diagram showing the state where a label is attached to the upper surface of the tongue 3. By providing the tongue 3, the opening of the racing shoe 1 becomes easier to widen, making it easier to insert the foot into the racing shoe 1. In addition, after the foot is inserted, the hook-and-loop fastener 8 mentioned above holds the foot (ankle), making it less likely for the racing shoe 1 to slip off after being put on.

[0029] Figure 5 is a diagram showing the shape of the heel protection part 7. The heel protection part 7 has a hinge structure, and the heel is sandwiched between the open right and left sides. This structure makes it possible to protect the heel from side-to-side shaking during motor racing.

[0030] 6 is a diagram showing the shapes of the first hook-and-loop fastener 81 and the second hook-and-loop fastener 82. As shown in (a), the first hook-and-loop fastener 81 and the second hook-and-loop fastener 82 close from above the tongue 3 and the upper 2 to prevent the driver's foot from coming off the racing shoe 1. A care label 91 is attached to the back side of the first hook-and-loop fastener 81 that is located above the driver's foot, and a hologram label 92 is attached to the back side of the second hook-and-loop fastener 82 that is located below the driver's foot.

[0031] As shown in Fig. 6(b), the dimensions of the care label 91 are preferably, for example, 21 mm in length and 35 mm in width, and as shown in Fig. 6(c), the dimensions of the hologram label 92 are preferably, for example, 21 mm in length and 30 mm in width.

[0032] 7 is a diagram showing labels affixed to the hook-and-loop fastener 8 and the tongue 3. (a) is a diagram showing a care label 91 affixed to the back side of the first hook-and-loop fastener 81. (b) is a diagram showing a hologram label 92 affixed to the back side of the second hook-and-loop fastener 82. By affixing these labels, the driver can be identified even in the event of an accident.

[0033] The upper 2 and the outsole 4 are made of a flame-retardant material. Specifically, the upper 2 is made of flame-retardant fibers such as meta-aramid fibers, acrylic fibers, and polyester fibers. In automobile racing, heat and fire may occur due to an accident, and the driver must be protected from the heat and fire, so it is preferable that the upper 2 is made of a flame-retardant fiber. An example is Lastan (registered trademark) manufactured by Asahi Kasei Advance Corporation. Lastan is made of an oxidized acrylic material with excellent heat resistance, and has excellent electrical insulation, chemical resistance, and flame resistance.

[0034] The insole 6 is in close contact with the sole of the driver's foot. By being in close contact with the sole of the driver's foot, the insole 6 reduces the repulsive force acting on the sole of the foot when the driver steps on the pedal 10. The insole 6 is made of, for example, Fibotex.

[0035] The upper 2 is joined to the insole 6 and covers the driver's foot from above. In other words, it wraps the instep of the driver's foot. By covering the driver's foot from above, the upper 2 prevents the driver's foot from coming off the racing shoe 1. The outsole 4 is joined to the lower part of the insole 6 and comes into contact with the pedal 10 of the car.

[0036] For the material of Upper 2, kip nubuck is used for the center of the instep. Nubuck is a top-grain leather with a velvety finish, which is made by sanding the grain (outer surface) to make the short protein fibers fluffy (knapped), and is resistant to wear and tear, and can be white or colored. It has high strength, thickness, and a fine grain surface. The characteristics of nubuck are similar to aniline leather, and it is soft to the touch, easily scratched, and temporarily darkens with water droplets (the color returns to normal when dried). For the material of Upper 2, S-heron is used for both the left and right sides of the instep.

[0037] A midsole 5 is interposed between the insole 6 and the outsole 4. The midsole 5 is made of ethylene vinyl acetate (EVA). EVA is an elastomeric polymer that is flexible, durable at low temperatures, and resistant to stress cracking, and is suitable for use as a component of the racing shoe 1. The presence of the midsole 5 encases the heel and protects it from impacts during motor racing.

[0038] The outsole 4 is formed from any one of nitrile rubber, butadiene rubber, and chloroprene rubber, or a mixture of these, and contains at least vanadium, calcium carbonate, and calcium sulfate as a flame retardant.

[0039] As shown in FIG. 8, the outsole 4 has a first ridge 43, a second ridge 44, a third ridge 45, and a pedal contact belt 50. The first ridge 43 extends along the plantar fascia from the heel of the driver's foot to the base of the driver's toes. The second ridge 44 is a beam that is disposed on the plantar arch side of the first ridge 43, that is, in the arch part. The third ridge 45 is a beam that is disposed directly below the cuboid bone of the driver's foot, that is, on the outside of the foot. The pedal contact belt 50 is formed in the short direction of the outsole 4 from the base of the driver's toes to directly below the transverse head of the adductor pollicis. The first ridge 43 stabilizes the movement of the center of gravity and reduces or eliminates stress on the joints. The second ridge 44 can return the center of foot pressure to the first ridge 43 in the early stage of the movement of the center of foot pressure, especially when the center of foot pressure deviates to the left or right from the heel protrusion 42 and the first ridge 43. The third ridge 45 can make it easier to maintain the posture of the foot from the little toe side, thereby reducing fatigue.

[0040] The first ridge 43 is the longest of the three ridges and extends along the plantar fascia from the heel of the driver's foot to the base of the driver's toes. The first ridge 43 has a first narrow portion 46 and a second narrow portion 47. That is, the width of the first narrow portion 46 at the base of the toes and the second narrow portion 47 at the heel portion are formed narrower than the width of the central portion 48. This is because it is necessary to increase the exposure amount of the pedal contact belt portion 50 at the base of the toes (first narrow portion 46) and increase friction. Also, the amount of the first ridge 43 is reduced at the heel portion (second narrow portion 47) to make it easier to bend. Also, the first ridge 43 extends along the plantar fascia from the heel of the driver's toes to the base of the fourth toe.

[0041] The end of the third ridge 45 is provided with a third narrow portion 49. The third narrow portion 49 is on the little toe side and is intended not to interfere with the movement of the toes.

[0042] The first ridge 43 and the third ridge 45 are disposed on the upper side of the pedal contact belt 50. The first ridge 43 and the third ridge 45 are on the outer side of the pedal contact belt 50 (the side closer to the pedal 10), and extend to pass through the pedal contact belt 50 and extend forward of the pedal contact belt 50 to the tips of the toes. At this time, care is taken not to hide too much of the pedal contact belt 50. This is to prevent slipping, as hiding too much can make the belt more likely to slip.

[0043] 9 is a front view of the racing shoe 1. The portion where the sole body 41 is attached and the portion where the pedal contact belt portion 50 is attached are formed to be thick. In other words, the portion immediately behind the base of the toes is formed to be thick. This is because this is the portion where the driver applies the most force when stepping on the pedal 10, and this is to reduce wear and fatigue in this portion.

[0044] 10 is a left side view of the racing shoe 1. The tips of the first ridge 43 and the third ridge 45 are visible. In other words, the tips of the first ridge 43 and the third ridge 45 reach near the tips of the driver's toes. The first ridge 43 extends to near the tip of the fourth toe of the driver's foot, and the third ridge 45 extends to near the tip of the fifth toe of the driver's foot.

[0045] Fig. 11 is an enlarged end view of a cut portion taken along line AA in Fig. 3. Since line AA cuts the leg at its middle, the first ridges 43, second ridges 44, and third ridges 45 are aligned side by side on the end surface.

[0046] 11, the tops of the first ridges 43, second ridges 44, and third ridges 45 are flat and all have the same height. Since the tops are flat and all have the same height, the bottom surface of the racing shoe 1 fits tightly against the pedal 10 with no gaps, allowing the driver's foot to apply force evenly to the pedal 10.

[0047] FIG. 12 is an end view of the cut portion cut along line BB, similar to FIG. 8. Looking at the end view of the cut portion cut along line BB, the toe side 51 and the heel side 52 are flat. In addition to being flat from the toe side 51 to the heel side 52, a natural curve is also allowed. This shows that the pedal contact belt 50 is flat. The pedal contact belt 50 is formed so as to cover the part of the plantar muscle that is formed longest and thickest in the left-right direction of the foot, including the base of the toes of the driver's foot, the thenar eminence, and the little toe ball. The pedal contact belt 50 is also formed to have the same width. In addition, the pedal contact belt 50 has a plurality of equally spaced grooves. Due to the presence of these grooves, the pedal 10 is more likely to catch on the surface of the pedal 10 when it comes into contact with the pedal 10, causing friction and making it less likely to slip. In addition, the grooves are provided at equal intervals in order to make the friction of the pedal contact belt 50 uniform.

[0048] 13 is a bottom view showing a schematic diagram of the racing shoe 1 according to the present embodiment. The plantar fascia of the driver's foot is shown by a dashed line. It can be seen that the first ridge 43, the second ridge 44, and the third ridge 45 extend along the plantar fascia of the driver's foot.

[0049] 13, the portions indicated by F1 to F4 indicate the heel portion F1, arch portion F2, thenar eminence portion F3, and toe portion F4 of the outsole 4. Here, in this specification, the heel portion F1 refers to the portion corresponding to the tarsal bone in the longitudinal direction, the arch portion F2 refers to the portion corresponding to the metatarsal bone in the longitudinal direction, thenar eminence portion F3 refers to the portion corresponding to the sesamoid bone at the tip of the first metatarsal bone in the longitudinal direction, and the toe portion F4 refers to the portion corresponding to the phalanges in the longitudinal direction.

[0050] The sole body 41 is formed so as to become gradually thinner from the heel side to the toe side with the midsole 5 superimposed thereon, and is configured so that the toe part F4 is slightly curved upward. The bottom surface of the sole body 41 is formed flat, and a heel protrusion 42 is provided at the heel part F1.

[0051] The area where the heel protrusion 42 is provided is not particularly limited as long as it is an area corresponding to the heel portion F1, and in this embodiment, it is provided over the entire area including the center of the heel portion F1. By providing the heel protrusion 42 over the entire area including the center of the heel portion F1 of the sole body 41 in this way, a relatively wide area can be brought into contact with the ground during driving, and the center of foot pressure can be smoothly guided to the center of the heel protrusion 42, and the center of foot pressure can be easily guided to the first ridge 43, making it possible to guide the center of foot pressure in a stable state.

[0052] In addition, the heel protrusion 42 of the present invention is not particularly limited in terms of its position of formation as long as it is in a range corresponding to the heel portion F1 and the arch portion F2, and in addition to being provided over the entire area of ​​the heel portion F1 as in this embodiment, it may also be, for example, one that includes the heel portion F1 and has its tip extending into the arch portion F2.

[0053] The amount of protrusion of the heel protrusion 42 from the sole body 41 is not particularly limited, and is preferably set appropriately within the range of, for example, 3 to 10 mm, and more preferably 3 to 5 mm. That is, if the amount of protrusion is too small, it becomes difficult to properly guide the center of foot pressure to the first ridge 43 while absorbing the shock accompanying the driving motion during driving, and if the amount of protrusion is too large, it becomes easier to lose balance, which may hinder smooth driving motion.

[0054] As can be seen from Fig. 14 showing the VV end face in Fig. 13, the first ridge 43 is provided on the underside of the sole body 41. The first ridge 43 is a ridge extending linearly and continuously from the widthwise center of the heel protrusion 42 toward the base of the fourth toe T, and is formed in a rectangular shape in vertical cross section. Specifically, the first ridge 43 is disposed such that its tip 53 is located slightly toward the heel side relative to the portion corresponding to the base of the fourth toe T, as shown in Fig. 4, so that the center of foot pressure guided to the tip 53 is guided to the inside of the thenar eminence F3, as shown by the arrow P in Fig. 4.

[0055] Here, the reason why the tip of the first protrusion 43 is located near the base of the fourth toe T is to stabilize the movement of the center of gravity and to reduce or eliminate stress on the joints. In other words, if the tip of the first protrusion 43 is located further outboard than the base of the fourth toe T, for example, outboard of the fifth toe (little toe), the force tending to tilt the body inward will act too early, causing the ankle joint and knee joint to turn outward, resulting in stress on the joints such as the toes and ankle joints, as typified by hallux valgus. On the other hand, if the tip of the first protrusion 43 is located inside the base of the fourth toe T, for example, in the toe area around the second toe, the force tending to tilt the body outward will be too strong, causing the center of gravity to swing left and right, making the body unstable, and stress opposite to the stress on the joints will be applied to the joints. Therefore, it is necessary to position the tip of the first protrusion 43 in the toe portion around the base of the fourth toe T in order to stabilize the movement of the center of gravity and reduce or eliminate stress on the joints.

[0056] In particular, the above effect is remarkable when the portions of the first ridge 43 corresponding to the thenar eminence F3 and the toe F4 are extended so as to overlap with the straight line connecting the center of the heel protrusion 42 and the base of the fourth toe T. As a racing shoe in particular, it reduces the driver's foot fatigue during long endurance races.

[0057] The width of this first ridge 43 is narrower than the width of the heel protrusion 42 and is constant over its entire length, specifically, it is formed to be equal to the width of the fourth toe T. Furthermore, the first ridge 43 is formed so that its protrusion amount from the sole body 41 is the same as that of the heel protrusion 42 at the base end side (heel side), so that its underside is formed continuous with the underside of the heel protrusion 42. Furthermore, the protrusion amount of this first ridge 43 is set to gradually decrease toward its tip end side, and in this embodiment, the protrusion amount at the tip end 53 is set to be about half that of the central portion 48.

[0058] Needless to say, the width and protrusion amount of the first protrusion 43 can be changed as appropriate depending on the specifications of the racing shoe, and the rate of reduction when it gradually becomes smaller toward the tip can also be changed as appropriate depending on the application, etc.

[0059] Because the first ridge 43 is formed narrower than the heel protrusion 42 and its underside is continuous with the heel protrusion 42, the center of foot pressure at the heel protrusion 42 is accurately guided to the first ridge 43 and moves along the first ridge 43. In other words, the heel protrusion 42 and the first ridge 43 form a desirable path for the center of foot pressure, making it possible to easily control the movement of the center of foot pressure.

[0060] The second ridges 44 and the third ridges 45 are provided to protrude from both left and right sides of the central portion 48 of the first ridge 43, and from both widthwise ends of the underside of the sole body 41, as shown in Fig. 8 and Fig. 12. The second ridges 44 and the third ridges 45 are provided to return the center of foot pressure to the first ridge 43 side when the center of foot pressure deviates to the left or right from the first ridge 43 at the beginning of the movement process of the center of foot pressure, particularly when the center of foot pressure moves from the heel protrusion 42 to the first ridge 43. The amount of protrusion of the second ridges 44 and the third ridges 45 is also set to gradually decrease from the heel portion F1 side toward the arch portion F2 side, and the reduction rate of the amount of protrusion is set to be greater than the reduction rate of the first ridge 43. Therefore, the difference in the amount of protrusion between the second ridges 44 and the third ridges 45 and the first ridges 43 gradually increases toward the toe side. By gradually increasing the difference in the amount of protrusion between the ridges 43, 44, and 45 toward the toe side in this manner, the center of foot pressure can be more reliably guided to the first ridge 43.

[0061] The second ridges 44 and the third ridges 45 are formed continuously on the heel protrusions 42 on both sides, extend along the left and right side edges of the sole body 41, and are arranged so that their tips are both located in the center of the arch part F2. The width of the second ridges 44 and the third ridges 45 is constant in the longitudinal direction and is narrower than the first ridges 43. By arranging the first ridges 43 and the second ridges 44 and the third ridges 45 on the left and right sides of the first ridges 43 on the outsole 4 of the racing shoe 1 as in the embodiment, the adaptability of the pedal operation by the driver's foot is improved. In addition, it is effective in reducing the load on the foot when the sole of the foot is constantly stepping on the pedal and releasing the sole of the foot from the pedal while driving. [Explanation of symbols]

[0062] 1. Racing shoes 2. Upper 3 Tan 4 Outsole 5 Midsole 6 Insoles 7 Heel protection part 8. Hook and Loop Fastener 10 Pedals 41 Sole body 42 Heel protrusion 43 First protrusion 44 Second protrusion 45 3rd rib 46 1st narrow part 47 2nd narrow part 48 Central part 49 3rd narrow part 50 Pedal contact area 51 Toe side 52 Heel side 53 Tip 81 First hook-and-loop fastener 82 Second hook-and-loop fastener 91 Care Label 92 Holographic Label

Claims

1. A racing shoe worn by a driver in a motor racing event, comprising: An insole that fits closely to the sole of the driver's foot, an upper joined to the insole and covering the driver's foot from above; An outsole joined to a lower part of the insole and in contact with a pedal of a vehicle, The outsole is a first protrusion extending along a portion of the plantar fascia from the heel of the driver's foot to the base of the driver's toes; A second protrusion disposed closer to the plantar arch than the first protrusion; a third ridge disposed immediately below the cuboid bone of the driver's foot; a pedal contact zone formed in the short direction of the outsole from the base of the driver's toes to just below the lateral head of the adductor pollicis. A racing shoe characterized by its

2. The racing shoe according to claim 1 , wherein the upper and the outsole are made of a flame-retardant material.

3. 3. The racing shoe according to claim 2, wherein the outsole is made of any one of nitrile rubber, butadiene rubber, and chloroprene rubber, or a mixture of these, and contains at least vanadium, calcium carbonate, and calcium sulfate as a flame retardant.

4. The racing shoe according to claim 2, wherein the upper is made of a flame-retardant fiber.

5. 2. The racing shoe according to claim 1, wherein said pedal contact zone has a plurality of equally spaced grooves.

6. 2. The racing shoe according to claim 1, wherein the first protrusion extends along a portion immediately below the plantar fascia from the heel of the driver's foot to the base of the fourth toe of the driver's foot.

7. 2. The racing shoe according to claim 1, wherein the tops of the first ridges, the second ridges and the third ridges are flat and have the same height.

8. 2. The racing shoe according to claim 1, wherein the first ridge is provided at an end thereof with a first narrow portion.

9. 2. The racing shoe according to claim 1, wherein an end of the third ridge is provided with a third narrow portion.

10. 2. The racing shoe according to claim 1, wherein the first ridge and the third ridge are disposed on an upper side of the pedal contact belt portion.

11. The racing shoe according to claim 1, wherein a midsole is interposed between the insole and the outsole.

12. 2. The racing shoe according to claim 1, wherein the upper is provided with a heel protection portion for protecting the heel of the driver's foot.

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