JP5248975B2 - Golf shoes - Google Patents

Description

  The present invention relates to a golf shoe.

  Golf shoes can affect golf swings. For example, a slippery golf shoe causes an unstable swing. An unstable swing adversely affects the shot. Golf shoes with high stability can contribute to swing stability.

Golf shoes have been proposed that can contribute to stability of the swing by reinforcing the arch portion or the like. Japanese Patent Laid-Open No. 2001-218603 discloses a shoe sole provided with a stabilizer made of a hard elastic body on an arch portion or the like. Japanese Patent Application Laid-Open No. 2005-143654 discloses a stabilizer having an arch portion and a heel portion.
JP 2001-218603 A JP 2005-143654 A

  The present inventor has studied in detail the relationship between swings and golf shoes. The movements during the swing were considered for each of the right and left feet. As a result, based on a new technical idea, a golf shoe capable of improving swing stability has been obtained.

  An object of the present invention is to provide a golf shoe that can contribute to the stability of a swing.

  The shoe according to the present invention includes a shoe sole and an upper. The shoe sole has an outsole and a reinforcing member. The reinforcing member is provided on the arch portion of the shoe sole. The reinforcing member has a first rib extending from the inside heel side toward the outside toe side and a second rib extending from the outside heel side toward the inside toe side. On the upper surface of the first rib, x grooves extending from the inside heel side toward the outside toe side are provided. On the upper surface of the second rib, y grooves extending from the outside heel side toward the inside toe side are provided. However, x is an integer greater than or equal to 1, and y is an integer greater than or equal to 0. In addition, y is 0 means that the groove | channel extended toward the inside toe side from the outside heel side is not provided in the upper surface of the said 2nd rib.

  Preferably, the x is larger than the y. Preferably, the first rib is thicker than the second rib.

  The torsional rigidity of the shoe sole can be appropriately improved by the first rib and the second rib intersecting each other. The torsional rigidity of the shoe sole can be appropriately adjusted by the groove provided on the upper surface of the rib. The swing can be stabilized by the first rib and the second rib.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings. In the present application, “upper” means the upper side when a shoe is placed on a horizontal plane with the ground contact surface as the lower side. “Lower” means the lower side when a shoe is placed on a horizontal surface with the ground contact surface on the lower side. In the present application, the front side has the same meaning as the toe side, and the rear side has the same meaning as the heel side.

  FIG.1 and FIG.2 is the figure by which the shoe 1 which concerns on 1st embodiment of this invention was shown. FIG. 1 is a view from the outside. FIG. 2 is a view from the inside. This shoe 1 is a golf shoe. FIG. 3 is a view of the shoe 1 as seen from the bottom side.

  1, 2 and 3 are views relating to the shoe 1 for the left foot. The shape of the ground contact surface in the shoe 1 for the right foot is the mirror image of FIG.

  The shoe 1 includes a shoe sole 3 and an upper 5. The shoe sole 3 includes an outsole 7, a midsole 9, and a reinforcing member 11.

  In FIG. 3, what is indicated by a symbol L1 is a line obtained by extending both ends of the length line L1. The length line L1 is the longest line segment that can be drawn within the contour of the bottom surface of the shoe sole 3. The direction of the length line L1 can be the front-rear direction.

  The outsole 7 has a ground plane. A part of the ground plane is the bottom surface of the outsole 7. The lower surface of the shoe 1 is a ground contact surface.

  The outsole 7 is divided. The outsole 7 includes a front divided body 7a located on the toe side and a rear divided body 7b located on the heel side (see FIG. 3). The front divided body 7 a is located on the toe side of the reinforcing member 11. The rear divided body 7 b is located on the heel side of the reinforcing member 11. The ground contact surface of the shoe 1 includes a front divided body 7a, a reinforcing member 11, and a rear divided body 7b.

  As shown in FIG. 3, the reinforcing member 11 is provided on the arch portion of the shoe sole 3. At least a part of the reinforcing member 11 is disposed on at least a part of the arch part. The reinforcing member 11 extends from the arch to the toe side. The reinforcing member 11 extends to the heel side from the arch portion.

  FIG. 4 is a view showing the reinforcing member 11 alone. FIG. 4 shows the reinforcing member 11 of the shoe 1 for the left foot. The shape of the reinforcing member 11 in the shoe 1 for the right foot is a mirror image of FIG.

  FIG. 5 is a cross-sectional view of the shoe sole 3 taken along line VV in FIG. 6 is a cross-sectional view of the shoe sole 3 taken along the line VI-VI in FIG. FIG. 7 is a cross-sectional view of the shoe sole 3 taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view of the shoe sole 3 taken along line VIII-VIII in FIG. FIG. 8 shows only a part of the cross section along the line VIII-VIII. FIG. 8 shows only a cross section near the reinforcing member 11. In FIG. 5, the description of the ridges (the ridges 13 and 17 described later) is omitted.

  As shown in FIG. 3, the outsole 7 is provided with a plurality of protrusions 15. The protrusion 15 protrudes downward. The protrusion 15 enhances the anti-slip performance of the shoe 1.

  The outsole 7 has a detachable collar 13. Moreover, the outsole 7 has the base 16 for attaching the collar 13 (refer FIG. 5). The pedestal 16 has a screw hole 16a. The flange 13 is fixed by being screwed into the base 16.

  The flange 13 protrudes downward. In the present embodiment, six ridges 13 are provided. As shown in FIGS. 1 and 2, the flange 13 protrudes downward from the protrusion 15. The heel 13 enhances the anti-slip performance of the shoe 1.

  The material of the outsole 7 is not particularly limited. Examples of the material of the outsole 7 include rubber, synthetic resin, and thermoplastic elastomer. For the purpose of receiving the dynamic load of the wearer, the outsole 7 is required to have strength and wear resistance. From this point of view, the outsole 7 is made of a non-porous material having no bubbles. In other words, the outsole 7 is a non-foamed body. As a preferable material of the outsole 7, a composition made of so-called solid rubber or resin can be used. Preferred materials for the outsole 7 include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), urethane rubber, thermoplastic resin and rubber. These composite elastomers are exemplified. Two or more of these may be used in combination. From the viewpoint of cushioning properties and flexibility, vulcanized rubber is most preferable as the material of the outsole 7.

  The outsole 7 preferably has a durometer A hardness of 40 or more. If the hardness is too low, there is a risk of wobbling the wearer's walk. In this respect, the hardness of the outsole 7 is more preferably 50 or more, further preferably 60 or more, and particularly preferably 70 or more. If the hardness is too high, the flexibility required for walking can be reduced. If the hardness is too high, the cushioning property at the buttocks tends to be insufficient. From these viewpoints, the hardness of the outsole 7 is preferably 85 or less, and more preferably 80 or less. In this application, durometer A hardness is measured based on JIS-K6253.

  The midsole 9 is made of a foam. The midsole 9 is integrally formed as a whole and is not divided. The material of the midsole 9 is an ethylene-vinyl acetate copolymer (hereinafter referred to as “EVA”). Using this polymer as a base material, an EVA composition containing a foaming agent or a minute hollow sphere (referred to as “microballoon” or the like) is used for the midsole 9. From the viewpoint of improving productivity, the material of the midsole 9 is preferably thermoplastic. The foam midsole 9 has a sponge shape. The midsole 9 is flexible. By making the midsole 9 into a foam, the shock absorption of the shoe sole 3 is enhanced. The expansion ratio of the midsole 9 is determined in consideration of the material of the outsole 7, the thickness of the outsole 7, the thickness of the midsole 9 itself, and the like. The expansion ratio of the midsole 9 is normally about 1.5 to 10 times.

  The midsole 9 has a durometer A hardness (JIS-K6253) of preferably 30 or more, and more preferably 40 or more. If the hardness is too low, there is a risk of wobbling the wearer's walk. If the hardness is too high, the cushioning property tends to be insufficient. From this viewpoint, the hardness of the midsole 9 is preferably 80 or less, and more preferably 70 or less.

  As shown in FIG. 4, the reinforcing member 11 has an exposed portion 11a and a non-exposed portion 11b. The exposed part 11a is exposed to the outside. The non-exposed portion 11b is not exposed to the outside. The non-exposed portion 11 b is provided at the front edge of the reinforcing member 11 and the rear edge of the reinforcing member 11. Two ribs to be described later are provided on the exposed portion 11a.

  As shown in FIGS. 7 and 8, the non-exposed portion 11 b is sandwiched between the outsole 7 and the midsole 9. The upper surface of the non-exposed portion 11b is bonded to the lower surface of the midsole 9. The lower surface of the non-exposed portion 11 b is bonded to the upper surface of the outsole 7. The reinforcing member 11 having a portion sandwiched between the outsole 7 and the midsole 9 is not easily detached from the shoe sole 3.

  In the shoe 1 of the present embodiment, the outsole 7, the midsole 9, and the reinforcing member 11 are separately formed. In the shoe 1, the outsole 7 and the midsole 9 are bonded with an adhesive. The outsole 7 and the midsole 9 may be vulcanized and bonded. The outsole 7 and the midsole 9 may be fused.

  As shown in FIGS. 6 and 8, the upper surface of the reinforcing member 11 is in contact with the lower surface of the midsole 9. The upper surface of the reinforcing member 11 and the lower surface of the midsole 9 are joined. An adhesive is used for this joining.

  As shown in FIGS. 3 and 4, the reinforcing member 11 includes a first rib R1 extending from the inside heel side toward the outside toe side, and a second rib R2 extending from the outside heel side toward the inside toe side. Have The first rib R1 extends so that the toe side becomes the outside. The 2nd rib R2 is extended so that it may become inside toward the toe side. A rib is a line-like protrusion. For the purpose of facilitating understanding, the first rib R1 and the second rib R2 are shown in dotted patterns (dots) in FIG.

  The first rib R1 and the second rib R2 intersect at the intersection K. At the intersection K, the protruding height of the first rib R1 is higher than the protruding height of the second rib R2. Therefore, at the intersection K, the outline of the first rib R1 exists, but the outline of the second rib R2 does not exist.

  The first rib R1 is provided with two grooves m1 (see the wavy line in FIG. 3). The groove m1 is provided substantially along the longitudinal direction of the first rib R1. As shown in FIG. 6, the groove m <b> 1 is provided on the upper surface of the reinforcing member 11. The groove m1 extends from the inside heel side toward the outside toe side. In the present embodiment, x is 2 when the number of grooves m1 is x. x may be an integer of 1 or more. The cross-sectional shape of the groove m1 is substantially V-shaped.

  The second rib R2 is provided with one groove m2 (see the wavy line in FIG. 3). The groove m2 is provided substantially along the longitudinal direction of the second rib R2. The groove m2 is provided on the upper surface of the reinforcing member 11. The groove m2 extends from the outside heel side toward the inside toe side. In the present embodiment, y is 1 when the number of grooves m2 is y. y may be an integer of 0 or more. Note that y being 0 means that the groove m2 is not provided. That is, the groove m2 provided on the upper surface of the second rib and extending from the outside heel side toward the inside toe side may be omitted. The cross-sectional shape of the groove m2 is substantially V-shaped.

  The groove m2 is divided in the middle. The groove m2 is divided at the intersection K. The groove m2 does not cross the intersection K. The groove m2 has an interruption point dt (see FIG. 3). Like the groove m2 of the present embodiment, the number of grooves m2 divided in the middle is regarded as one.

  The groove m1 is not divided on the way. The groove m1 is not divided at the intersection K. The groove m1 crosses the intersection K. The groove m1 is continuous from the rear of the intersection K to the front of the intersection K.

  The groove m1 is not divided at the intersection K, whereas the groove m2 is divided at the intersection K. Due to the presence or absence of this division, the effect by the groove m1 is higher than the effect by the groove m2. This difference can contribute to making the torsional rigidity A smaller than the torsional rigidity B. The torsional rigidity A and torsional rigidity B will be described later.

  The width W1 of the first rib R1 is made smaller toward the heel side. The width W1 of the first rib R1 is made smaller toward the inside. In the second rib R2, the portion where the width W2 of the second rib R2 increases toward the outside occupies half or more of the length of the second rib R2.

  The first rib R1 is thicker than the second rib R2. In the plan view shown in FIG. 3, the maximum value of the width W1 of the first rib R1 is larger than the maximum value of the width W2 of the second rib R2. The average value of the width W1 is larger than the average value of the width W2.

  The maximum value of the width W2 in the region in front of the intersection K is smaller than the minimum value of the width W1 in the region in front of the intersection K.

  The first rib R1 has a toe side end M1 and a rear end T1. The second rib R2 has a toe side end M2 and a rear end T2.

  The reinforcing member 11 has a flange 17 protruding downward from the first rib R1. The scissors 17 are detachable. The flange 17 can be attached to and detached from the first rib R1. The reinforcing member 11 has a pedestal 18 for attaching the flange 17 (see FIG. 5). The base 18 has a screw hole 18a. The flange 17 is screwed into the base 18 and fixed. The flange 17 protrudes below the protrusion 15. The flange 17 protrudes below a protrusion 19 described later. In the present embodiment, one ridge 17 is provided. The shape of the flange 17 is equal to the shape of the flange 13.

  Note that there is no protrusion protruding downward from the second rib R2.

  The flange 17 is provided in front of the intersection K. The flange 17 is provided on the outside of the intersection K. The coffin 17 is provided in front of the arch portion.

  As shown in FIG. 3, the reinforcing member 11 has a protrusion 19. The protrusion 19 is provided in the vicinity of the flange 17. The protrusion 19 is integrally formed with the main body of the reinforcing member 11. The protrusion 19 protrudes downward. The protrusion 19 enhances the anti-slip performance of the shoe 1.

  The protrusion 19 is provided in front of the intersection K. The protrusion 19 is provided on the outside of the intersection K. The protrusion 19 is provided in front of the arch portion.

  The reinforcing member 11 includes an inside reinforcing portion 21 disposed on the inside side surface of the shoe sole 3 and an outside reinforcing portion 23 disposed on the outside side surface of the shoe sole 3.

  The inside reinforcing portion 21 covers a part of the inside side surface of the midsole 9. Further, the inside reinforcing portion 21 covers a part of the inside side surface of the upper 5. In other words, the inside reinforcing portion 21 exists on the inside of the upper 5.

  The inside reinforcing portion 21 extends upward from the inside end of the first rib R1. The inside reinforcing portion 21 exists above the rear end T1 of the first rib R1 (see FIG. 2).

  The outside reinforcing portion 23 covers a part of the outside side surface of the midsole 9. Further, the outside reinforcing portion 23 covers a part of the outside side surface of the upper 5. In other words, the outside reinforcing portion 23 exists on the outside of the upper 5.

  The outside reinforcing portion 23 extends upward from the outside end of the second rib R2. The outside reinforcing portion 23 exists above the rear end T2 of the second rib R2 (see FIG. 1).

  When the contact area between the outside reinforcing portion 23 and the upper 5 is S1, and the contact area between the inside reinforcing portion 21 and the upper 5 is S2, S1 is larger than S2. By setting S1> S2, the foot is liable to fall down in the body inner direction. By setting S1> S2, it is difficult for the foot to fall down in the outward direction of the body. By setting S1> S2, the swing is easily stabilized.

  In FIG. 2, the rear end point of the inside reinforcing portion 21 is indicated by reference numeral X <b> 1. The rear end point X1 is located on the rear side (back side) from the rear end T1 of the first rib R1. With this configuration, the vicinity of the heel of the foot is easily stabilized. With this configuration, the stability of the shoe 1 resulting from the reinforcing member 11 can be improved, and the swing can be stabilized.

  In the region inside the intersection K, the reinforcing member 11 has an extending portion 25 extending between the first rib R1 and the second rib R2 (see FIGS. 3 and 4). The extension 25 can improve the stability of the shoe 1 and stabilize the swing.

  In the region outside the intersecting portion K, the reinforcing member 11 has an extending portion 27 extending between the first rib R1 and the second rib R2 (see FIGS. 3 and 4). The extension 27 can improve the stability of the shoe 1 and stabilize the swing.

  In FIG. 1, the rear end point of the outside reinforcing portion 23 is indicated by reference numeral X <b> 2. The rear end point X2 is located on the rear side (back side) from the rear end T2 of the second rib R2. With this configuration, the vicinity of the heel of the foot is easily stabilized. With this configuration, the stability of the shoe 1 resulting from the reinforcing member 11 can be improved, and the swing can be stabilized.

  9 to 12 are views showing a shoe 29 according to the second embodiment. FIG. 9 is a view of the shoe 29 as seen from the outside. FIG. 10 is a view of the shoe 29 as seen from the bottom side. 11 is a cross-sectional view taken along line F11-F11 in FIG. 12 is a part of a cross-sectional view taken along line F12-F12 in FIG. FIG. 12 shows only the vicinity of the reinforcing member 41.

  9 to 12 are views relating to the shoe 29 for the left foot. The shape of the contact surface in the right foot shoe 29 is the mirror image of FIG.

  The shoe 29 includes a shoe sole 31 and an upper 33. The shoe sole 31 includes an outsole 37, a midsole 39, and a reinforcing member 41.

  As shown in FIG. 10, the reinforcing member 41 is provided on the arch portion of the shoe sole 31. At least a part of the reinforcing member 41 is disposed on at least a part of the arch part. The reinforcing member 41 extends from the arch to the toe side. The reinforcing member 41 extends to the heel side from the arch portion.

  The outsole 37 is provided with a plurality of protrusions 43. The protrusion 43 protrudes downward. The protrusion 43 increases the anti-slip performance of the shoe 29. The outsole 37 has a protrusion 45 having a shape similar to a heel. The protrusion 45 increases the anti-slip performance of the shoe 29.

  The material of the outsole 37 is the same as that of the shoe 1 described above. The material of the midsole 39 is the same as that of the shoe 1 described above.

  As shown in FIG. 12, the reinforcing member 41 has an exposed portion 41a and a non-exposed portion 41b. The exposed portion 41a is exposed to the outside. The non-exposed portion 41b is not exposed to the outside. The non-exposed portion 41 b is provided on the front edge of the reinforcing member 41 and the rear edge of the reinforcing member 41. Two ribs, which will be described later, are provided on the exposed portion 41a.

  As shown in FIG. 12, the non-exposed portion 41 b is sandwiched between the outsole 37 and the midsole 39. The reinforcing member 41 having a portion sandwiched between the outsole 37 and the midsole 39 is difficult to come off from the shoe sole 31.

  As shown in FIG. 10, the reinforcing member 41 has a first rib R1 extending from the inside heel side toward the outside toe side, and a second rib R2 extending from the outside heel side toward the inside toe side. The first rib R1 extends so that the toe side becomes the outside. The 2nd rib R2 is extended so that it may become inside toward the toe side.

  The first rib R1 and the second rib R2 intersect at the intersection K. At the intersection K, the protruding height of the first rib R1 is higher than the protruding height of the second rib R2. Therefore, at the intersection K, the outline of the first rib R1 exists, but the outline of the second rib R2 does not exist.

  The first rib R1 is provided with one groove m1 (see the wavy line in FIG. 10). The groove m1 is provided substantially along the longitudinal direction of the first rib R1. As shown in FIGS. 11 and 12, the groove m <b> 1 is provided on the upper surface of the reinforcing member 41. The groove m1 extends from the inside heel side toward the outside toe side. The groove m1 extends to the outside toward the toe side. When the number of the grooves m1 is x, in the present embodiment, x is 1. The cross-sectional shape of the groove m1 is substantially V-shaped.

  The groove m1 crosses the intersection K. The groove m1 extends continuously from the toe side of the intersection K to the heel side of the intersection K. The groove m1 is not divided at the intersection K.

  On the upper surface of the second rib R2, a groove m2 extending from the outside heel side toward the inside toe side is not provided. In the present embodiment, y is 0 when the number of grooves m2 is y.

  The first rib R1 is thicker than the second rib R2. In the plan view shown in FIG. 10, the maximum value of the width W1 of the first rib R1 is larger than the maximum value of the width W2 of the second rib R2. The average value of the width W1 is larger than the average value of the width W2.

  As shown in FIG. 10, the first rib R1 has a toe side end M1 and a rear end T1. The second rib R2 has a toe side end M2 and a rear end T2.

  The reinforcing member 41 has a protrusion 47 that protrudes downward from the first rib R1. In the present embodiment, six protrusions 47 are provided. The protrusion 47 is integrally formed with the reinforcing member 41. The protrusion 47 protrudes downward. The protrusion 47 enhances the slip prevention performance of the shoe 29.

  As shown in FIG. 10, three of the protrusions 47 are provided outside the intersection K. There is a projection 47 located outside the intersection K. Three of the protrusions 47 are provided in front of the intersection K. There is a projection 47 located in front of the intersection K. The frontmost protrusion 47 is provided in front of the arch portion. The volume of the protrusion 47 is larger toward the outside. The volume of the protrusion 47 is larger toward the front side.

  As described above, the first rib R1 is thicker than the second rib R2. Thereby, a swing is easy to be stabilized. Hereinafter, this operation will be described.

  Here, the case of a right-handed golfer is described.

  First, the movement of the right foot is considered. During the backswing, a sway to the right side is likely to occur. The “right side” is the right side for a swinging golfer. Sway means the wobbling of the body in the lateral direction. Sway tends to hinder swing stability. Swing to the right can reduce swing efficiency. This reduction in efficiency can reduce the head speed. A sway to the right can cause a miss shot.

  Ideally, during the backswing, the right foot should not move or tilt slightly to the inside of the body (the left side of the swinging golfer) to suppress the sway to the right. This right foot movement suppresses sway. Conversely, in a backswing, if the right foot falls to the outside of the body, a sway is likely to occur.

Thus, from the viewpoint of suppressing the sway in the back swing, it is preferable that the right foot does not easily fall to the outside of the body. From this viewpoint, the torsional rigidity of the sole 3 in the right foot shoe 1 is preferably such that the following torsional rigidity B is greater than the torsional rigidity A.
[Torsional rigidity A] Torsional rigidity when the heel portion of the shoe sole 3 rotates inward with respect to the toe portion of the shoe sole 3.
[Torsional rigidity B] The torsional rigidity when the heel portion of the shoe sole 3 rotates outward with respect to the toe portion of the shoe sole 3.

  However, in the case of the shoe 1 for the right foot, “inside rotation” means counterclockwise rotation when viewed from the heel side. In the case of the shoe 1 for the left foot, “inside rotation” means clockwise rotation when viewed from the heel side. “Outward rotation” means clockwise rotation when viewed from the heel side in the case of the shoe 1 for the right foot. In the case of the shoe 1 for the left foot, “outward rotation” means counterclockwise rotation when viewed from the heel side.

  Further, in the definitions of [torsional rigidity A] and [torsional rigidity B], “the heel part of the shoe sole 3” means a part on the heel side with respect to the reinforcing member 11, and “the toe part of the shoe sole 3”. Means the toe side portion of the reinforcing member 11.

  Next, the movement of the right foot in impact is considered. In impact, it is preferable that the right foot falls inside the body and "kicks". By this “kicking with the right foot”, the body force can be efficiently converted into a swing. Due to this “kicking with the right foot”, the head speed can be improved.

  In order for a right-handed golfer to “kick with the right foot” smoothly, the right foot must fall into the body. In order for this to fall down, it is preferable that the torsional rigidity A is smaller than the torsional rigidity B. In order for the right-handed golfer to “stress with the left foot” smoothly, the left foot preferably falls into the body. In order for this to fall down, it is preferable that the torsional rigidity A is smaller than the torsional rigidity B.

  If the torsional rigidity of the reinforcing member 11 is too high as a whole, the torsional rigidity A becomes excessively high, and “kicking by the right foot” is not easily performed. By providing the rib R1 and the rib R2 that intersect each other, the torsional rigidity A is suppressed from being excessive, and the torsional rigidity A can be made smaller than the torsional rigidity B.

  Next, the movement of the left foot is considered. A sway to the left side tends to occur between the top and the impact. This “left side” is the left side for the swinging golfer. This sway tends to hinder swing stability. A sway to the left can reduce the efficiency of the swing. This reduction in efficiency can reduce the head speed. A sway to the left can cause a miss shot.

  In order to suppress the sway to the left side, it is ideal that the left foot does not move from the top to the impact. Therefore, during the period from the top to the impact, a force toward the inside of the body should be applied to the left foot. Sway is suppressed by the force toward the inside of the body. However, in a general golfer, the left foot falls to the outside and a sway is likely to occur. Moreover, in a general golfer, the left foot is not fixed and may be twisted.

  When the left foot falls to the outside (left side), the heel portion of the shoe sole 3 of the left foot rotates outward with respect to the toe portion of the shoe sole 3. In order to stabilize the left foot and suppress the sway, it is preferable that the torsional rigidity B is larger than the torsional rigidity A in the shoe 1 for the left foot.

  The case of a right-handed golfer has been described, but in the case of a left-handed golfer, the roles of the left and right feet are simply switched. The present invention is also effective for left-handed golfers.

  As described above, it has been found that the preferable torsional rigidity for stabilizing the swing is common to the shoes for the left foot and the shoe for the right foot. That is, it is preferable that the torsional rigidity A is smaller than the torsional rigidity B for both the right foot and the left foot.

  It has been found that the torsional rigidity A becomes smaller than the torsional rigidity B by making the first rib R1 thicker than the second rib R2. Therefore, it is considered that the first rib R1 and the second rib R2 contribute to the improvement of torsional rigidity in the extension direction rather than the compression direction.

  The toe side end M1 of the first rib R1 is located on the front side (toe side) of the toe side end M2 of the second rib R2 (see FIGS. 4 and 10). This configuration contributes to making the torsional rigidity A smaller than the torsional rigidity B.

From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, it is preferable that the following (a) is satisfied.
(A) The volume of the first rib R1 is Va, the volume of the second rib R2 is Vb, the maximum length of the first rib R1 is La, and the maximum length of the second rib R2 is Lb. The following relational expression (1) is satisfied.
[Va / La]> [Vb / Lb] (1)

  The length La and the length Lb are shown in FIG. The length La is a distance between the toe side end M1 and the rear end T1. The length Lb is a distance between the toe side end M2 and the rear end T2. Note that the volume of the intersection K is included in both the volume Va and the volume Vb.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the maximum value Sa of the cross-sectional area of the first rib R1 is preferably larger than the maximum value Sb of the cross-sectional area of the second rib R2. The cross-sectional area Sa and the cross-sectional area Sb are cross-sectional areas by a plane perpendicular to the longitudinal direction of the rib.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the volume Va of the first rib R1 is preferably larger than the volume Vb of the second rib R2.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the length La is preferably larger than the length Lb.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the protrusion height of the first rib R1 is preferably higher than the protrusion height of the second rib R2 at the intersection K. With this configuration, the rib effect at the intersection K is greater in the first rib R1 than in the second rib R2. Due to the configuration of the intersection K, the torsional rigidity A tends to be smaller than the torsional rigidity B.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, it is preferable that the maximum value of the width W2 in the region in front of the intersection K is smaller than the minimum value of the width W1 in the region in front of the intersection K. .

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, it is preferable that the number x of the grooves m1 is larger than the number y of the grooves m2. That is, x> y is preferable. When comparing under the condition that the volume of the first rib R1 is the same, the first rib R1 in which the groove m1 is present has a higher torsional rigidity B than the first rib R1 in which the groove m1 is not present. It was found that it could be further improved. Further, when the comparison is performed under the condition that the volume of the second rib R2 is the same, the second rib R2 in which the groove m2 is present has a torsional rigidity compared to the second rib R2 in which the groove m2 does not exist. It was found that A can be further improved. It is considered that the three-dimensional groove suppresses deformation of the rib (mainly due to tensile force). Therefore, x> y contributes to making the torsional rigidity A smaller than the torsional rigidity B. By setting x> y, the effect of ribs intersecting each other can be further improved.

  The number x of the grooves m1 is 1 or more. The upper limit of x is not limited. When the cross-sectional area of the groove m1 is excessively small, the above-described effect due to the groove may be reduced. In this respect, the number x is preferably 5 or less, more preferably 4 or less, and more preferably 3 or less.

  The number y of the grooves m2 is 0 or more. As described above, x> y is preferable. In light of x> y, the number y is preferably 4 or less, more preferably 3 or less, and more preferably 2 or less.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the difference (xy) is preferably 1 or more. From the viewpoint of setting the number x of the grooves m1 in a preferable range, the difference (xy) is preferably 3 or less, and more preferably 2 or less.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the average value of the cross-sectional area of the groove m1 is preferably larger than the average value of the cross-sectional area of the groove m2. This cross-sectional area is a cross-sectional area by a plane perpendicular to the extending direction of the groove.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the average value of the width (opening width) of the groove m1 is preferably larger than the average value of the width (opening width) of the groove m2.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the average depth of the groove m1 is preferably larger than the average depth of the groove m2.

  From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the ratio (Vm1 / Va) of the volume Vm1 of the groove m1 to the volume Va of the first rib R1 is preferably 0.05 or more, more preferably 0.07 or more. preferable. When the thickness of the first rib R1 is excessively small, the rigidity of the first rib R1 may be excessively decreased, and the torsional rigidity B may be excessively decreased. In this respect, the ratio (Vm1 / Va) is preferably equal to or less than 0.50, and more preferably equal to or less than 0.20. When there are a plurality of grooves m1, the volume Vm1 is the sum of the volumes of the respective grooves m1. The unit of the volume Vm1 and the volume Va is cc.

  From the viewpoint of appropriately setting the torsional rigidity A, when the groove m2 is provided, the ratio (Vm2 / Vb) of the volume Vm2 of the groove m2 to the volume Vb of the second rib R2 is preferably 0.03 or more. .05 or more is more preferable. From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the ratio (Vm2 / Vb) is preferably 0.50 or less, and more preferably 0.20 or less. When there are a plurality of grooves m2, the volume Vm2 is the sum of the volumes of the respective grooves m2. The unit of volume Vm2 and volume Vb is cc.

  As described above, the maximum length of the first rib R1 is La. From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the ratio (Lv1 / La) of the length Lv1 of the line segment connecting both ends of the groove m1 to the length La is preferably 0.30 or more, 0.50 The above is more preferable. The upper limit of the ratio (Lv1 / La) is 1 or less. When there are a plurality of grooves m1, the length Lv1 is the total length between both ends of each groove m1. The unit of the length Lv1 and the length La is mm.

  As described above, the maximum length of the second rib R2 is Lb. From the viewpoint of increasing the rigidity of the second rib R2, the ratio (Lv2 / Lb) of the length Lv2 of the line segment connecting both ends of the groove m2 to the length Lb is preferably 0.30 or more, more preferably 0.50 or more. preferable. From the viewpoint of making the torsional rigidity A smaller than the torsional rigidity B, the ratio (Lv2 / Lb) is preferably 0.90 or less, and more preferably 0.85 or less. When there are a plurality of grooves m2, the length Lv2 is the total length between both ends of each groove m2. The unit of the length Lv2 and the length Lb is mm.

  The groove m1 and the groove m2 are provided on the upper surface of the reinforcing member. The groove m1 and the groove m2 are not exposed to the outside. There is no fear that mud, lawn or the like enters the groove m1 and the groove m2.

  The material of the reinforcing member is not limited. Preferably, the reinforcing member is a non-foamed body. The reinforcing member suppresses deformation of the midsole and improves the stability of the shoe.

  From the viewpoints of rigidity and moldability, the material of the reinforcing member is preferably a thermoplastic resin, a thermoplastic elastomer, or EVA. From the viewpoints of rigidity, moldability and economy, a thermoplastic elastomer is more preferable. A preferred thermoplastic elastomer has a hard segment and a soft segment. Examples of the thermoplastic elastomer include styrene butadiene type thermoplastic elastomer (TPS), olefin type thermoplastic elastomer (TPO), polyester type thermoplastic elastomer (TPEE) and polyurethane type thermoplastic elastomer (TPU).

  A more preferable material of the reinforcing member is TPU. TPU is excellent in rigidity, moldability and economy. In the present invention, it is not preferable that the torsional rigidity of the reinforcing member is too high or too low. The TPU is suitable for appropriately setting the torsional rigidity of the reinforcing member.

  As specific examples of TPU, trade names “UTC-95” manufactured by Bayer, and trade names “XNY585”, “ET690”, and “ET590” manufactured by BASF Japan are exemplified.

  From the viewpoint of swing stability, it is preferable that the hardness of the reinforcing member is higher than the hardness of the outsole 7. The durometer A hardness (JIS-K6253) of the reinforcing member is preferably 90 or more. When the hardness of the reinforcing member is low, the torsional rigidity of the shoe sole 3 may be insufficient and the stability may be insufficient. If the hardness of the reinforcing member is too high, the torsional rigidity of the shoe sole 3 is too high and it is difficult to swing. From this viewpoint, the durometer A hardness of the reinforcing member is preferably 100 or less, more preferably 99 or less, and particularly preferably 95 or less.

  From the same viewpoint as the durometer A hardness, the Shore D hardness of the reinforcing member is preferably 50 or less, more preferably 45 or less, and particularly preferably 42 or less. Shore D hardness is determined by a Shore D type spring hardness meter attached to an automatic rubber hardness measuring device (trade name “P1” of Kobunshi Keiki Co., Ltd.) in accordance with the provisions of “ASTM-D 2240-68”. Measured. For the measurement, a slab having a thickness of about 2 mm formed by hot pressing is used. A slab stored for 2 weeks at a temperature of 23 ° C. is used for the measurement. At the time of measurement, three slabs are overlaid. A slab made of the same composition as the reinforcing member is used for the measurement.

  The present invention can be applied to at least one of left and right shoes. Preferably, the present invention applies to both left and right shoes. As described above, the present invention is effective for both the left and right shoes.

  The present invention can be applied to golf shoes.

FIG. 1 is a view of a shoe according to a first embodiment of the present invention viewed from the outside. FIG. 2 is a view of the shoe according to the first embodiment of the present invention as viewed from the inside. FIG. 3 is a diagram showing a ground contact surface of the shoe of FIG. FIG. 4 is a view showing a reinforcing member used in the shoe of FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. FIG. 9 is a view of a shoe according to the second embodiment of the present invention as seen from the outside. FIG. 10 is a diagram showing a ground contact surface of the shoe of FIG. 11 is a cross-sectional view taken along line F11-F11 in FIG. 12 is a part of a cross-sectional view taken along F12-F12 in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,29 ... Shoes 3,31 ... Shoe sole 5,33 ... Upper 7,37 ... Outsole 9,39 ... Midsole 11,41 ... Reinforcement member 13,45 .... Outsole ridges 15, 43 ... Outsole projections 17 ... ridges projecting downward from the first ribs 19, 47 ... projections projecting downward from the first ribs 21 ... Inside reinforcement Part 23 ... Outside reinforcing part 25 ... Extension part extending between the first rib and the second rib 27 ... Extension part R1 extending between the first rib and the second rib -1st rib R2 ... 2nd rib m1 ... Groove provided in the upper surface of the 1st rib m2 ... Groove provided in the upper surface of the 2nd rib T1 ... Rear end of the 1st rib T2 ... Rear end of second rib

Claims (2)

With shoe soles and uppers,
The shoe sole has an outsole and a reinforcing member,
The reinforcing member is provided on the arch of the sole,
The reinforcing member has a first rib extending from the inside heel side toward the outside toe side, and a second rib extending from the outside heel side toward the inside toe side,
On the upper surface of the first rib, x grooves extending from the inside heel side toward the outside toe side are provided,
A golf shoe in which y grooves extending from the outside heel side toward the inside toe side are provided on the upper surface of the second rib.
However, x is an integer of 1 or more, y is than zero or an integer der, x is greater than y. The golf shoe according to claim 1, wherein the first rib is thicker than the second rib.

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