JP5102458B2 - Sole sole structure - Google Patents

Description

  The present invention relates to a sole structure of a shoe, and more particularly, to an improvement of a sole structure for improving fit of a middle foot portion (arch portion) of a shoe without lowering shank rigidity.

  In shoes, there is a demand to improve the fit of the midfoot. As a measure for that, it is conceivable to reduce the width of the midfoot portion of the shoe so that the shape of the midfoot portion of the shoe conforms to the shape of the arch portion of the foot. However, in this case, the torsional rigidity and the bending rigidity of the middle foot portion of the shoe are lowered, and the shank rigidity is lowered, which may impair the stability of the shoe.

  The present invention has been made from such a viewpoint, and the main object is to improve the fit of the midfoot part of the shoe without reducing the shank rigidity. In the present invention, attention is paid to a sole structure in which the sole is composed of two layers of plate members.

  By the way, the conventional sole structure which consists of a two-layer plate member is described in Unexamined-Japanese-Patent No. 2003-9906 and Unexamined-Japanese-Patent No. 2003-339405, for example. In the thing shown in Unexamined-Japanese-Patent No. 2003-9906, the sole plate has a two-layer structure from the buttocks to the middle foot part, and in the thing shown in Japanese Patent Laid-Open No. 2003-339405, the sole plate has two sole plates. It has a layered structure.

However, any of these sole structures is intended only to increase the shank rigidity of the middle foot portion by forming the middle foot portion of the shoe into a two-layer structure. When the plate member has the same width, there is a gap between the upper and the foot in the middle foot of the shoe when the upper is secured to the upper plate member, improving the fit of the middle foot From this point of view, it is not enough.
Japanese Patent Laying-Open No. 2003-9906 (see FIG. 3) JP 2003-339405 A (see FIG. 2)

  The present invention has been made in view of such conventional circumstances, and the problem to be solved by the present invention is to improve the fit of the midfoot portion of the shoe without reducing the shank rigidity. is there.

The sole structure of the shoe according to the invention of claim 1 is disposed on the upper side of the sole structure, and extends on at least a middle foot portion of the sole structure, and on the lower side of the sole structure. The lower plate member is disposed between the upper plate member and the upper plate member via a gap, and extends to at least the middle foot portion of the sole structure. The width at the middle foot portion of the upper plate member is smaller than the width at the middle foot portion of the lower plate member. In the middle foot portion, the upper plate member is interposed via a midsole member disposed on the upper side thereof. Or, it is directly attached to the lower part of the upper part of the shoe .

According to the first aspect of the present invention, since the upper plate member disposed above the middle foot portion (that is, the position closer to the wearer's foot) is narrower than the lower plate member, shoes The middle foot portion can be easily adapted to the shape of the arch portion of the wearer's foot to improve the fit, and the middle foot portion is disposed below the upper plate member and more than the upper plate member. In addition, since the torsional rigidity of the midfoot part can be secured by the wide lower plate member, the shank rigidity of the midfoot part can be improved. In addition, if the upper plate member is fixed to the lower part of the upper part of the shoe through the midsole member arranged on the upper side, the cushioning property of the middle foot part can be secured, so that it can be used by beginner runners On the other hand, when the upper plate member is directly fixed to the lower part of the upper part of the shoe upper part, the fit of the middle foot part of the shoe can be further enhanced. As a result, it is possible to improve the sense of unity between the upper part and the sole structure, and as a result, a shoe suitable for an elite runner who pursues speed can be realized.

  In the middle foot part, the ratio of the width of the upper plate member to the lower plate member is preferably 0.22 to 0.63, more preferably as claimed in the invention of claim 2. As described in the invention of No. 3, it is 0.24 to 0.54.

  In general, the position in the front-rear direction of the narrowest part of the foot arch varies depending on the person, but this position is expressed by the ratio of the distance from the rear end of the heel to the total length of the foot (foot length). When data is collected from a person, it is as shown in the column of “arch length from foot end / foot length” in the table shown in FIG.

  In the same table, “High-1 to 6” indicates the data of six people of so-called high arch where the height of the arch is high, and similarly, “Low-1 to 6” indicates that the height of the arch is low. The data of 6 people of so-called low arch are shown. “High-average” indicates the average value of the data of six high arch people, similarly “Low-average” indicates the average value of the data of six low arch people, and “All-average” indicates the high arch. And the average value of the data of all the low arches is shown. “High-SD” indicates the standard deviation of the data of 6 high arch people, and similarly, “Low-SD” indicates the standard deviation of the data of 6 low arch people, and “All-SD” The standard deviation of the data for all high arches and low arches is shown.

  From these data, the range of the value of (arch length from the rear end of the heel) / (foot length) is determined. As the method, 0.39 ± 0.06 (that is, 0.33 to 0.45) was adopted based on the average value and standard deviation of all high arches and low arches. Therefore, the position in the front-rear direction of the narrowest part of the arch portion of the foot is 0.33L to 0.45L from the rear end of the heel when the foot length is L.

  Also, although the height of the foot arch varies depending on the person, it depends on the width dimension A of the arch ground contact area when the sole is in contact with the ground contact surface and the vertical projection line to the ground contact surface of the middle foot portion of the foot. Regarding the ratio A / B with the width dimension B in the middle foot region to be drawn, data of a large number of people are collected, and the result is shown in the column “A / B” in the table shown in FIG.

  From these data, the range of A / B values is determined. As one of the methods, 0.30−0.08 = 0.22 is set as the lower limit value of A / B from the average value and the standard deviation of the high arch and the low arch so as to include both the high arch and the low arch. Adopted, and 0.48 + 0.15 = 0.63 is adopted as the upper limit value. As another method, 0.39−0.15 = 0.24 is adopted as the lower limit value of A / B from the average value and standard deviation of all the high arch and the low arch, and 0.39 + 0. 15 = 0.54 is adopted.

  In the invention of claim 2, the former method is adopted, and in the invention of claim 3, the latter method is adopted, and the width dimensions A and B are replaced with the width of the upper plate member and the width of the lower plate member, respectively. is there. That is, in the invention of claim 2, the ratio of the width of the upper plate member to the width of the lower plate member is (0.22 to 0.63): 1, and in the invention of claim 3, the ratio is (0. 24-0.54): 1.

  Next, although the position in the width direction of the foot arch contact area varies depending on the person, the center line position of the arch contact area when the sole is in contact with the ground contact surface is projected vertically onto the foot contact surface. When the data of a large number of people are collected by representing the ratio of the distance from the instep side to the distance from the instep side of the middle foot region drawn by the line, the “arch portion in the table shown in FIG. As shown in the column “Ratio of the center line of the ground contact area from the inner side”.

  From these data, the value of “ratio of the arch ground contact area center line from the inner side” is determined. As the method, a value of 0.7 was adopted based on the average value of all high arches and low arches. Therefore, the center line of the foot arch contact area is 0.7 distance from the inner edge when the width of the middle foot area drawn by the vertical projection line on the foot contact surface is 1. It will be.

  The invention of claim 4 is adapted to adapt the position in the width direction of the upper plate member of the sole structure to the actual foot, and the center line of the middle foot portion of the upper plate member is set in the sole structure. It is arranged at a position of 7: 3 in the ratio of the inner side to the outer side of the foot.

  According to the invention of claim 4, the fitting performance of the middle foot portion of the shoe can be further enhanced.

  In the invention of claim 5, the upper plate member is constricted while curving inwardly on the inner shell side of the middle foot portion of the sole structure.

  In this case, for an average foot having a large inner arch, it is possible to improve the fit on the inner foot side of the shoe, and to realize a shoe adapted to the three-dimensional shape of the inner arch.

  In the invention of claim 6, the upper plate member is constricted while curving inwardly on the outer side of the middle foot portion of the sole structure.

  In this case, in particular, in indoor shoes, it is possible to improve the fit on the outer foot side of the middle foot part of the shoe, so that it is possible to reliably support lateral movement such as side steps.

  In the invention of claim 7, the upper plate member is constricted while curving inwardly on the inner shell side and the outer shell side of the middle foot portion of the sole structure.

  In this case, it is possible to improve the fit on both the inner side and the outer side of the middle foot portion of the shoe, so that it is possible to realize a shoe that is suitable for both running and indoor sports.

  In the invention of claim 8, the upper and lower plate members extend from the heel portion of the sole structure to the front foot portion through the middle foot portion, and all extend over the entire length of the shoe structure body.

  In this case, since the torsional rigidity and the bending rigidity can be improved over the entire length of the sole structure, it is possible to improve the running stability from landing to takeoff.

According to the ninth aspect of the present invention, a rib projecting toward the lower plate member and extending in the front-rear direction is provided on the lower surface of the upper plate member in the middle foot portion.

  In this case, the rib can increase the bending rigidity in the front-rear direction of the upper plate member, so that excessive sinking of the upper plate can be prevented during loading such as landing on shoes, and traveling stability can be improved. .

  As described above, according to the present invention, the upper and lower plate members of the upper and lower layers are provided in the middle foot portion, and the width of the upper plate member is made narrower than the width of the lower plate member, so that the shank rigidity is reduced. This makes it possible to improve the fit of the midfoot part of the shoe.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a plan view of a sole structure for shoes according to an embodiment of the present invention, and FIG. 2 is a partial sectional view of the shoe taken along the line II-II of FIG.

  As shown in FIG. 1 and FIG. 2, the sole structure 1 is disposed on the upper side of the sole structure 1, and includes an upper plate member 2 extending to at least a middle foot portion of the sole structure 1, and the sole structure 1. On the lower side, the lower plate member 3 is disposed between the upper plate member 2 via a gap and extends to at least the middle foot portion of the sole structure 1. In the example shown in FIG. 1, the upper plate member 2 and the lower plate member 3 extend from the buttocks of the sole structure 1 to the forefoot through the middle foot and extend over the entire length of the sole structure 1. Yes.

  As shown in FIG. 1, the width of the upper plate member 2 is smaller than the width of the lower plate member 3 in the middle leg portion of the sole structure 1. Here, when the total length of the sole structure 1 is L, the position of the middle leg portion of the sole structure 1 is 0.33L to 0.45L from the heel rear end He (in other words, 0.39L ± 0.06L). ). The reason for this is as already described with reference to the table of FIG. 6, in order to make the position of the middle foot portion of the sole structure 1 correspond to the narrowest portion of the average foot arch portion.

  The upper plate member 2 has a constricted shape while curving inwardly on the inner shell side of the middle foot portion. Further, it is preferable that the width of the upper plate member 2 is narrowest at a position of 0.39 L from the heel rear end He of the sole structure 1. On the other hand, the lower plate member 3 has a shape along the vertical projection line of the foot.

  Here, the position of the center line C in the middle foot portion of the upper plate member 2 is the inner side when the width in the middle foot portion of the entire sole structure (here, equal to the width of the lower plate member 3) is Wd. It is disposed at a distance of 0.7 Wd from the edge (in other words, 0.3 Wd from the outer edge). The reason for this is as already described with reference to the table of FIG. 6 and is to correspond to the average foot arch.

In the middle foot portion, when the width of the upper plate member 2 is Wu and the width of the lower plate member 3 is Wd, preferably,
Wu / Wd = 0.22 to 0.63
More preferably,
Wu / Wd = 0.24-0.54
It has become.
These grounds have already been described with reference to the table of FIG. 6 and are for correspondence to the average foot arch.

  As shown in FIG. 2, the upper plate member 2 is fixed to the lower portion of the upper part 5 of the shoe via a midsole member 4 disposed on the upper side thereof. Unlike this, the upper plate member 2 may be directly fixed to the lower part of the upper part of the shoe.

  In this case, the upper plate member 2 disposed above the middle foot portion (that is, a position closer to the wearer's foot) is narrower than the lower plate member 3, so The foot portion can be easily adapted to the shape of the arch portion of the wearer's foot to improve the fit, and the foot portion is disposed below the upper plate member 2 in the middle foot portion, and is higher than the upper plate member 2. In addition, since the torsional rigidity of the midfoot can be secured by the wide lower plate member 3, the shank rigidity of the midfoot can be improved.

  Further, in this case, the upper plate member 2 is constricted inwardly on the inner instep side of the middle foot portion, so that an average foot having a large inner arch is compared with the inner foot side in the inner foot portion of the shoe. It is possible to improve the fit and to realize a shoe adapted to the three-dimensional shape of the inner arch.

  In the above-described embodiment, the upper plate member is shown to be constricted while curving inwardly only on the inner instep side of the middle foot portion. However, as shown in FIG. It can also be applied to those that are constricted inwardly only on the outer side of the middle foot, and as shown in FIG. 5, the upper plate member 2 is inward on both the inner side and the outer side of the middle foot. It can also be applied to constricted items. Preferably, the constriction degree on the inner shell side is larger than the constriction degree on the outer shell side.

  In the example shown in FIG. 4, particularly in an indoor shoe, the fitting performance on the outer side of the middle foot portion of the shoe can be improved, so that it is possible to reliably support lateral movement such as side steps. Further, in the example of FIG. 5, it is possible to improve both the inner side and the outer side of the middle foot portion of the shoe, thereby realizing a shoe that is compatible with both running and indoor sports.

  As shown in FIG. 3, ribs 6 that protrude downward toward the lower plate member 3 and extend in the front-rear direction (perpendicular to the drawing in the figure) are provided on the lower surface of the upper plate member 2 in the middle foot portion. Good.

  In this case, the rib 6 can increase the bending rigidity of the upper plate member 2 in the front-rear direction, so that excessive sinking of the upper plate 2 can be prevented during loading such as landing on shoes, and running stability can be improved. It can be improved. The rib 6 may have a length that reaches the lower plate member 3.

It is a top view of the sole structure by one Example of this invention. FIG. 2 is a partial cross-sectional view of the shoe taken along the line II-II of the sole structure (FIG. 1). It is a figure which shows the modification of FIG. It is a top view of the sole structure by the other Example of this invention. It is a top view of the sole structure by other Example of this invention. It is a table | surface which shows the various data of a person of a high arch person and a low arch person.

1: Sole structure

2: Upper plate member 3: Lower plate member 4: Midsole member 6: Rib

Wu: Width of upper plate member Wd: Width of lower plate member L: Total length of shoes (foot length)

Claims (9)

A sole structure of a shoe,
An upper plate member disposed on an upper side of the sole structure and extending to at least a middle foot portion of the sole structure;
A lower plate member disposed below the sole structure with a gap between the upper plate member and extending to at least a middle foot portion of the sole structure;
The width of the middle foot portion of the upper plate member is smaller than the width of the middle foot portion of the lower plate member ,
In the midfoot part, the upper plate member is fixed to the lower part of the upper part of the shoe through a midsole member disposed on the upper side or directly .
A sole structure of a shoe characterized by that. In claim 1,
When the width at the middle foot portion of the lower plate member is 1, the width at the middle foot portion of the upper plate member is 0.22 to 0.63.
A sole structure of a shoe characterized by that. In claim 1,
When the width at the middle foot portion of the lower plate member is 1, the width at the middle foot portion of the upper plate member is 0.24 to 0.54.
A sole structure of a shoe characterized by that. In claim 1,
The center line in the middle foot portion of the upper plate member is disposed at a position of 7: 3 in the ratio of the inner shell side to the outer shell side in the middle foot portion of the sole structure.
A sole structure of a shoe characterized by that. In claim 1,
The upper plate member is constricted while curving inwardly on the inner shell side of the middle foot portion of the sole structure.
A sole structure of a shoe characterized by that. In claim 1,
The upper plate member is constricted while curving inward on the instep side of the middle foot portion of the sole structure.
A sole structure of a shoe characterized by that. In claim 1,
The upper plate member is constricted while curving inwardly on the inner shell side and the outer shell side of the middle foot portion of the sole structure,
A sole structure of a shoe characterized by that. In claim 1,
The upper plate member and the lower plate member extend from the buttocks of the sole structure to the forefoot through the middle foot.
A sole structure of a shoe characterized by that. In claim 1,
A rib projecting downward toward the lower plate member and extending in the front-rear direction is provided on the lower surface of the upper plate member in the middle foot portion.
A sole structure of a shoe characterized by that.

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